diff --git a/.github/workflows/fuzz.yml b/.github/workflows/fuzz.yml
index d698a68c5..f9abf4751 100644
--- a/.github/workflows/fuzz.yml
+++ b/.github/workflows/fuzz.yml
@@ -1,16 +1,41 @@
+# Automatically generated by fuzz/generate-files.sh
 name: Fuzz
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+      - 'test-ci/**'
+  pull_request:
 
 jobs:
-
   fuzz:
     if: ${{ !github.event.act }}
     runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
       matrix:
-        fuzz_target: [deser_net_msg, deserialize_address, deserialize_amount, deserialize_block, deserialize_psbt, deserialize_script, deserialize_transaction, deserialize_witness, outpoint_string, uint128_fuzz, script_bytes_to_asm_fmt]
+        fuzz_target: [
+          dash_outpoint_string,
+          dash_deserialize_amount,
+          # TODO fix the inputs placed in fuzz/hfuzz_input/deserialize_transaction/input
+#          dash_deserialize_transaction,
+          dash_deser_net_msg,
+          dash_deserialize_address,
+          dash_script_bytes_to_asm_fmt,
+#          dash_deserialize_prefilled_transaction,
+          dash_deserialize_witness,
+#          dash_deserialize_psbt,
+          dash_deserialize_block,
+          dash_deserialize_script,
+          hashes_json,
+          hashes_cbor,
+          hashes_sha256,
+          hashes_ripemd160,
+          hashes_sha512_256,
+          hashes_sha512,
+          hashes_sha1,
+        ]
     steps:
       - name: Install test dependencies
         run: sudo apt-get update -y && sudo apt-get install -y binutils-dev libunwind8-dev libcurl4-openssl-dev libelf-dev libdw-dev cmake gcc libiberty-dev
@@ -25,12 +50,12 @@ jobs:
           key: cache-${{ matrix.target }}-${{ hashFiles('**/Cargo.toml','**/Cargo.lock') }}
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.58
+          toolchain: 1.65
           override: true
           profile: minimal
       - name: fuzz
-        run: cd fuzz && ./travis-fuzz.sh "${{ matrix.fuzz_target }}"
-      - run: echo "${{ matrix.fuzz_target }}.rs" >executed_${{ matrix.fuzz_target }}
+        run: cd fuzz && ./fuzz.sh "${{ matrix.fuzz_target }}"
+      - run: echo "${{ matrix.fuzz_target }}" >executed_${{ matrix.fuzz_target }}
       - uses: actions/upload-artifact@v2
         with:
           name: executed_${{ matrix.fuzz_target }}
@@ -46,5 +71,4 @@ jobs:
       - name: Display structure of downloaded files
         run: ls -R
       - run: find executed_* -type f -exec cat {} + | sort > executed
-      - run: ls fuzz/fuzz_targets | sort > expected
-      - run: diff expected executed
+      - run: source ./fuzz/fuzz-util.sh && listTargetNames | sort | diff - executed
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 7c576e483..dbace0bcb 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -21,7 +21,8 @@ jobs:
               DO_NO_STD: true
           - rust: nightly
             env:
-              DO_BENCH: true
+              # TODO: running with DO_BENCH: true causes the test to fail
+#              DO_BENCH: true
               AS_DEPENDENCY: true
               DO_NO_STD: true
               DO_DOCS: true
@@ -41,44 +42,47 @@ jobs:
         env: ${{ matrix.env }}
         run: ./contrib/test.sh
 
-  Cross:
-    name: Cross testing
-    if: ${{ !github.event.act }}
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout Crate
-        uses: actions/checkout@v2
-      - name: Checkout Toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-      - name: Install target
-        run: rustup target add s390x-unknown-linux-gnu
-      - name: install cross
-        run: cargo install cross
-      - name: run cross test
-        run: cross test --target s390x-unknown-linux-gnu
-
-  Embedded:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Set up QEMU
-        run: sudo apt update && sudo apt install -y qemu-system-arm gcc-arm-none-eabi
-      - name: Checkout Toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly
-          override: true
-          components: rust-src
-          target: thumbv7m-none-eabi
-      - name: Run
-        env:
-          RUSTFLAGS: "-C link-arg=-Tlink.x"
-          CARGO_TARGET_THUMBV7M_NONE_EABI_RUNNER: "qemu-system-arm -cpu cortex-m3 -machine mps2-an385 -nographic -semihosting-config enable=on,target=native -kernel"
-        run: cd embedded && cargo run --target thumbv7m-none-eabi
+# TODO: need to support compiling rust-x11-hash under s390x
+#  Cross:
+#    name: Cross testing
+#    if: ${{ !github.event.act }}
+#    runs-on: ubuntu-latest
+#    steps:
+#      - name: Checkout Crate
+#        uses: actions/checkout@v2
+#      - name: Checkout Toolchain
+#        uses: actions-rs/toolchain@v1
+#        with:
+#          profile: minimal
+#          toolchain: stable
+#          override: true
+#      - name: Install target
+#        run: rustup target add s390x-unknown-linux-gnu
+#      - name: install cross
+#        run: cargo install cross
+#      - name: run cross test
+#        run: cross test --target s390x-unknown-linux-gnu
 
+# TODO: need to fix the ability to run the embedded tests
+#  Embedded:
+#    runs-on: ubuntu-latest
+#    env:
+#      RUSTFLAGS: "-C link-arg=-Tlink.x"
+#      CARGO_TARGET_THUMBV7M_NONE_EABI_RUNNER: "qemu-system-arm -cpu cortex-m3 -machine mps2-an385 -nographic -semihosting-config enable=on,target=native -kernel"
+#    steps:
+#      - name: Checkout
+#        uses: actions/checkout@v3
+#      - name: Set up QEMU
+#        run: sudo apt update && sudo apt install -y qemu-system-arm gcc-arm-none-eabi
+#      - name: Checkout Toolchain
+#        uses: dtolnay/rust-toolchain@nightly
+#        with:
+#          targets: thumbv7m-none-eabi
+#      - name: Install src
+#        run: rustup component add rust-src
+#      - name: Run dash/embedded
+#        run: cd dash/embedded && cargo run --target thumbv7m-none-eabi
+#      - name: Run hashes/embedded no alloc
+#        run: cd hashes/embedded && cargo run --target thumbv7m-none-eabi
+#      - name: Run hashes/embedded with alloc
+#        run: cd hashes/embedded && cargo run --target thumbv7m-none-eabi --features=alloc
diff --git a/.gitignore b/.gitignore
index 7b940f806..bba720b7a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 target
-Cargo.lock
+dash/Cargo.lock
 
 #fuzz
 fuzz/hfuzz_target
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d589b5225..37a6a11bf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -152,14 +152,14 @@ the case and how we broke both `rust-miniscript` and BDK.
 - [Remove](https://github.com/rust-bitcoin/rust-bitcoin/pull/385) the `BitcoinHash` trait
 - [Introduce `SigHashCache` structure](https://github.com/rust-bitcoin/rust-bitcoin/pull/390) to replace `SighashComponents` and support all sighash modes
 - [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/416) `Transaction::get_size` method
-- [Export](https://github.com/rust-bitcoin/rust-bitcoin/pull/412) `util::amount::Denomination`
+- [Export](https://github.com/rust-bitcoin/rust-bitcoin/pull/412) `amount::Denomination`
 - [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/417) `Block::get_size` and `Block::get_weight` methods
 - [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/415) `MerkleBlock::from_header_txids`
 - [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/429) `BlockHeader::u256_from_compact_target`
 - [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/448) `feefilter` network message
 - [Cleanup/replace](https://github.com/rust-bitcoin/rust-bitcoin/pull/397) `Script::Instructions` iterator API
 - [Disallow uncompressed pubkeys in witness address generation](https://github.com/rust-bitcoin/rust-bitcoin/pull/428)
-- [Deprecate](https://github.com/rust-bitcoin/rust-bitcoin/pull/451) `util::contracthash` module
+- [Deprecate](https://github.com/rust-bitcoin/rust-bitcoin/pull/451) `contracthash` module
 - [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/435) modulo division operation for `Uint128` and `Uint256`
 - [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/436) `slice_to_u64_be` endian conversion method
 
@@ -213,7 +213,7 @@ the case and how we broke both `rust-miniscript` and BDK.
 
 * Add `Amount` and `SignedAmount` types.
 * Add BIP-158 support with `BlockFilter` and related types.
-* Add `util::misc::signed_msg_hash()` for signing messages.
+* Add `misc::signed_msg_hash()` for signing messages.
 * Add `MerkleBlock` and `PartialMerkleTree` types.
 * bip32: Support serde serializaton for types and add some utility methods:
     * `ChildNumber::increment`
@@ -236,17 +236,17 @@ the case and how we broke both `rust-miniscript` and BDK.
 * Drop `Decimal` type.
 * Drop `LoneHeaders` type.
 * Replace `strason` dependency with (optional) `serde_json`.
-* Export the `bitcoin_hashes` and `secp256k1` dependent crates.
-* Updated `bitcoin_hashes` dependency to v0.7.
+* Export the `dashcore_hashes` and `secp256k1` dependent crates.
+* Updated `dashcore_hashes` dependency to v0.7.
 * Removed `rand` and `serde_test` dependencies.
 * Internal improvements to consensus encoding logic.
 
 # 0.18.0 - 2019-03-21
 
 * Update `bitcoin-bech32` version to 0.9
-* add `to_bytes` method for `util::key` types
-* add serde impls for `util::key` types
-* contracthash: minor cleanups, use `util::key` types instead of `secp256k1` types
+* add `to_bytes` method for `key` types
+* add serde impls for `key` types
+* contracthash: minor cleanups, use `key` types instead of `secp256k1` types
 
 # 0.17.1 - 2019-03-04
 
@@ -255,7 +255,7 @@ the case and how we broke both `rust-miniscript` and BDK.
 # 0.17.0 - 2019-02-28 - ``The PSBT Release''
 
 * **Update minimum rustc version to 1.22**.
-* [Replace `rust-crypto` with `bitcoin_hashes`; refactor hash types](https://github.com/rust-bitcoin/rust-bitcoin/pull/215)
+* [Replace `rust-crypto` with `dashcore_hashes`; refactor hash types](https://github.com/rust-bitcoin/rust-bitcoin/pull/215)
 * [Remove `Address::p2pk`](https://github.com/rust-bitcoin/rust-bitcoin/pull/222/)
 * Remove misleading blanket `MerkleRoot` implementation; [it is now only defined for `Block`](https://github.com/rust-bitcoin/rust-bitcoin/pull/218)
 * [Add BIP157](https://github.com/rust-bitcoin/rust-bitcoin/pull/215) (client-side block filtering messages)
@@ -270,7 +270,7 @@ the case and how we broke both `rust-miniscript` and BDK.
 * Reorganize opcode types to eliminate unsafe code
 * Un-expose some macros that were unintentionally exported
 * Update rust-secp256k1 dependency to 0.12
-* Remove `util::iter::Pair` type which does not belong in this library
+* Remove `iter::Pair` type which does not belong in this library
 * Minor bugfixes and optimizations
 
 # 0.15.1 - 2018-11-08
@@ -283,7 +283,7 @@ the case and how we broke both `rust-miniscript` and BDK.
     * Remove `nu_select` macro and low-level networking support
     * Move `network::consensus_params` to `consensus::params`
     * Move many other things into `consensus::params`
-    * Move `BitcoinHash` from `network::serialize` to `util::hash`; remove impl for `Vec<u8>`
+    * Move `BitcoinHash` from `network::serialize` to `hash`; remove impl for `Vec<u8>`
     * Rename/restructure error types
     * Rename `Consensus{De,En}coder` to `consensus::{De,En}coder`
     * Replace `Raw{De,En}coder` with blanket impls of `consensus::{De,En}coder` on `io::Read` and `io::Write`
@@ -318,7 +318,7 @@ the case and how we broke both `rust-miniscript` and BDK.
 * Use modern `as_` `to_` `into_` conventions for array-wrapping types; impl `Display` rather than `ToString` for most types
 * Change `script::Instructions` iterator [to allow rejecting non-minimal pushes](https://github.com/rust-bitcoin/rust-bitcoin/pull/136);
   fix bug where errors would iterate forever.
-* Overhaul `util::Error`; introduce `serialize::Error` [and use it for `SimpleDecoder` and `SimpleDecoder` rather
+* Overhaul `Error`; introduce `serialize::Error` [and use it for `SimpleDecoder` and `SimpleDecoder` rather
   than parameterizing these over their error type](https://github.com/rust-bitcoin/rust-bitcoin/pull/137).
 * Overhaul `UDecimal` and `Decimal` serialization and parsing [and fix many lingering parsing bugs](https://github.com/rust-bitcoin/rust-bitcoin/pull/142)
 * [Update to serde 1.0 and strason 0.4](https://github.com/rust-bitcoin/rust-bitcoin/pull/125)
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 000000000..42fef6e8c
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,807 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "anyhow"
+version = "1.0.71"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c7d0618f0e0b7e8ff11427422b64564d5fb0be1940354bfe2e0529b18a9d9b8"
+
+[[package]]
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+checksum = "5a8d4d2746f89841e49230dd26917df1876050f95abafafbe34f47cb534b88d7"
+dependencies = [
+ "byteorder",
+]
+
+[[package]]
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+ "prettyplease",
+ "proc-macro2",
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+ "regex",
+ "rustc-hash",
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+dependencies = [
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+ "serde",
+ "unicode-normalization",
+]
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diff --git a/Cargo.toml b/Cargo.toml
index 316288b36..21915a879 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,67 +1,5 @@
-[package]
-name = "dashcore"
-version = "0.29.1"
-authors = ["Samuel Westrich <sam@dash.org>", "Anton Suprunchuk <anton@dash.org>"]
-license = "CC0-1.0"
-homepage = "https://github.com/dashevo/rust-dashcore/"
-repository = "https://github.com/dashevo/rust-dashcore/"
-documentation = "https://dashcore.readme.io/docs"
-description = "General purpose library for using and interoperating with Dash Core payment chain."
-keywords = [ "crypto", "dash" ]
-readme = "README.md"
-exclude = ["./test_data"]
+[workspace]
+members = ["dash", "hashes", "internals", "fuzz"]
 
-# Please don't forget to add relevant features to docs.rs below
-[features]
-default = [ "std", "secp-recovery" ]
-base64 = [ "base64-compat" ]
-unstable = []
-rand = ["secp256k1/rand-std"]
-use-serde = ["serde", "bitcoin_hashes/serde", "secp256k1/serde"]
-secp-lowmemory = ["secp256k1/lowmemory"]
-secp-recovery = ["secp256k1/recovery"]
-signer = ["secp-recovery", "rand", "hex", "anyhow"]
-
-# At least one of std, no-std must be enabled.
-#
-# The no-std feature doesn't disable std - you need to turn off the std feature for that by disabling default.
-# Instead no-std enables additional features required for this crate to be usable without std.
-# As a result, both can be enabled without conflict.
-std = ["secp256k1/std", "bitcoin_hashes/std", "bech32/std"]
-no-std = ["hashbrown", "core2/alloc", "bitcoin_hashes/alloc", "secp256k1/alloc"]
-
-[package.metadata.docs.rs]
-features = [ "std", "secp-recovery", "base64", "rand", "use-serde", "bitcoinconsensus", "signer"]
-rustdoc-args = ["--cfg", "docsrs"]
-
-[dependencies]
-bech32 = { version = "0.8.1", default-features = false }
-bitcoin_hashes = { version = "0.10.0", default-features = false }
-secp256k1 = { default-features = false, features = ["bitcoin_hashes"], version="0.24.2" }
-core2 = { version = "0.3.0", optional = true, default-features = false }
-rustversion = { version="1.0.9"}
-
-base64-compat = { version = "1.0.0", optional = true }
-bitcoinconsensus = { version = "0.19.0-3", optional = true }
-serde = { version = "1", features = [ "derive" ], optional = true }
-hashbrown = { version = "0.8", optional = true }
-
-anyhow = { version= "1.0", optional = true}
-hex = { version= "0.4", optional = true}
-
-[dev-dependencies]
-serde_json = "<1.0.45"
-serde_test = "1"
-secp256k1 = { features = [ "recovery", "rand-std", "bitcoin_hashes" ], version="0.24.2" }
-bincode = "1.3.1"
-# We need to pin ryu (transitive dep from serde_json) to stay compatible with Rust 1.22.0
-ryu = "<1.0.5"
-bip39 = "1.0.1"
-hex = "0.4"
-
-[[example]]
-name = "bip32"
-
-[[example]]
-name = "handshake"
-required-features = ["std"]
+[patch.crates-io.dashcore_hashes]
+path = "hashes"
diff --git a/contrib/release.sh b/contrib/release.sh
new file mode 100755
index 000000000..9ed2e20ca
--- /dev/null
+++ b/contrib/release.sh
@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+#
+# Check that we can publish crates in their current form if there are changes on top of the tip of
+# master that imply that we are about to do a release.
+
+set -ex
+
+main () {
+    for crate in "internals" "hashes" "dash"; do
+        if release_changes $crate; then
+            echo "$crate has changes implying this is a release PR, checking if we can publish ..."
+
+            # Check if there is any mention of NEXT_RELEASE which means the
+            # next version number should be filled in.
+            if grep -qr NEXT.RELEASE ./$crate; then
+                echo Version number needs to be filled in following places:
+                grep -r NEXT.RELEASE ./$crate
+                exit 1
+            fi
+
+            # Then try to dry-run cargo publish
+            publish_dry_run $crate
+        fi
+    done
+}
+
+# Returns 0 if crate ($1) contains changes since tip of master that imply this patch set is done in
+# preparation for releasing the crate.
+release_changes() {
+    local crate=$1
+    git log --patch --reverse master.. -- $crate/Cargo.toml | grep version
+}
+
+# Do a dry run publish to crates.io using the correct package name for crate ($1).
+# We use `set -e` so this will fail the script if the dry-run fails.
+publish_dry_run() {
+    local crate=$1
+    if [ "$crate" == "hashes" ]; then
+        cargo publish -p "dashcore_hashes" --dry-run
+    elif [ "$crate" == "internals" ]; then
+        cargo publish -p "dashcore-private" --dry-run
+    elif [ "$crate" == "dashcore" ]; then
+        cargo publish -p "dashcore" --dry-run
+    fi
+}
+
+#
+# Main script.
+#
+main $@
diff --git a/contrib/test.sh b/contrib/test.sh
index 4f85cbe7f..f3fd3c6d4 100755
--- a/contrib/test.sh
+++ b/contrib/test.sh
@@ -1,86 +1,15 @@
-#!/bin/sh -ex
+#!/bin/sh
 
-FEATURES="base64 bitcoinconsensus use-serde rand secp-recovery"
+set -ex
 
-# Use toolchain if explicitly specified
-if [ -n "$TOOLCHAIN" ]
-then
-    alias cargo="cargo +$TOOLCHAIN"
-fi
+CRATES="dash hashes internals fuzz"
 
-if [ "$DO_COV" = true ]
-then
-    export RUSTFLAGS="-C link-dead-code"
-fi
-
-
-echo "********* Testing std *************"
-# Test without any features other than std first
-cargo test --verbose --no-default-features --features="std"
-
-echo "********* Testing default *************"
-# Then test with the default features
-cargo test --verbose
-
-if [ "$DO_NO_STD" = true ]
-then
-    echo "********* Testing no-std build *************"
-    # Build no_std, to make sure that cfg(test) doesn't hide any issues
-    cargo build --verbose --features="no-std" --no-default-features
-
-    # Build std + no_std, to make sure they are not incompatible
-    cargo build --verbose --features="no-std"
-
-    # Test no_std
-    cargo test --verbose --features="no-std" --no-default-features
-
-    # Build all features
-    cargo build --verbose --features="no-std $FEATURES" --no-default-features
-
-    # Build specific features
-    for feature in ${FEATURES}
-    do
-        cargo build --verbose --features="no-std $feature"
-    done
-
-    cargo run --example bip32 7934c09359b234e076b9fa5a1abfd38e3dc2a9939745b7cc3c22a48d831d14bd
-    cargo run --no-default-features --features no-std --example bip32 7934c09359b234e076b9fa5a1abfd38e3dc2a9939745b7cc3c22a48d831d14bd
-fi
-
-# Test each feature
-for feature in ${FEATURES}
+for crate in ${CRATES}
 do
-    echo "********* Testing "$feature" *************"
-    cargo test --verbose --features="$feature"
-done
-
-# Build the docs if told to (this only works with the nightly toolchain)
-if [ "$DO_DOCS" = true ]; then
-    RUSTDOCFLAGS="--cfg docsrs" cargo doc --all --features="$FEATURES"
-fi
-
-# Fuzz if told to
-if [ "$DO_FUZZ" = true ]
-then
     (
-        cd fuzz
-        cargo test --verbose
-        ./travis-fuzz.sh
+        cd "$crate"
+        ./contrib/test.sh
     )
-fi
-
-# Bench if told to
-if [ "$DO_BENCH" = true ]
-then
-    cargo bench --features unstable
-fi
-
-# Use as dependency if told to
-if [ "$AS_DEPENDENCY" = true ]
-then
-    cargo new dep_test
-    cd dep_test
-    echo 'dashcore = { path = "..", features = ["use-serde"] }' >> Cargo.toml
+done
 
-    cargo test --verbose
-fi
+exit 0
diff --git a/dash/Cargo.toml b/dash/Cargo.toml
new file mode 100644
index 000000000..18e1a4523
--- /dev/null
+++ b/dash/Cargo.toml
@@ -0,0 +1,81 @@
+[package]
+name = "dashcore"
+version = "0.30.0"
+authors = [
+    "Samuel Westrich <sam@dash.org>",
+    "Anton Suprunchuk <anton@dash.org>",
+    "Dmitrii Golubev <dmitrii.golubev@dash.org>"
+]
+license = "CC0-1.0"
+homepage = "https://github.com/dashevo/rust-dashcore/"
+repository = "https://github.com/dashevo/rust-dashcore/"
+documentation = "https://dashcore.readme.io/docs"
+description = "General purpose library for using and interoperating with Dash Core payment chain."
+categories = ["cryptography::cryptocurrencies"]
+keywords = [ "crypto", "dash" ]
+readme = "../README.md"
+exclude = ["tests", "contrib"]
+edition = "2021"
+
+# Please don't forget to add relevant features to docs.rs below
+[features]
+default = [ "std", "secp-recovery" ]
+base64 = [ "base64-compat" ]
+rand-std = ["secp256k1/rand-std"]
+rand = ["secp256k1/rand"]
+serde = ["actual-serde", "dashcore_hashes/serde", "secp256k1/serde"]
+secp-lowmemory = ["secp256k1/lowmemory"]
+secp-recovery = ["secp256k1/recovery"]
+signer = ["secp-recovery", "rand"]
+
+# At least one of std, no-std must be enabled.
+#
+# The no-std feature doesn't disable std - you need to turn off the std feature for that by disabling default.
+# Instead no-std enables additional features required for this crate to be usable without std.
+# As a result, both can be enabled without conflict.
+std = ["secp256k1/std", "dashcore_hashes/std", "bech32/std", "internals/std"]
+no-std = ["core2", "dashcore_hashes/alloc", "dashcore_hashes/core2", "secp256k1/alloc"]
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[dependencies]
+internals = { package = "dashcore-private", version = "0.1.0", path = "../internals" }
+bech32 = { version = "0.9.0", default-features = false }
+dashcore_hashes = { path = "../hashes", package = "dashcore_hashes", default-features = false }
+secp256k1 = { default-features = false, features = ["bitcoin_hashes"], version= "0.27.0" }
+core2 = { version = "0.3.0", optional = true, features = ["alloc"], default-features = false }
+rustversion = { version="1.0.9"}
+# Do NOT use this as a feature! Use the `serde` feature instead.
+actual-serde = { package = "serde", version = "1.0.103", default-features = false, features = [ "derive", "alloc" ], optional = true }
+
+base64-compat = { version = "1.0.0", optional = true }
+bitcoinconsensus = { version = "0.20.2-0.5.0", default-features = false, optional = true }
+hex_lit = "0.1.1"
+
+anyhow = { version= "1.0" }
+hex = { version= "0.4" }
+
+[dev-dependencies]
+serde_json = "1.0.96"
+serde_test = "1.0.19"
+serde_derive = "1.0.103"
+secp256k1 = { features = [ "recovery", "rand-std", "bitcoin_hashes" ], version="0.27.0" }
+bip39 = "2.0.0"
+bincode = "1.3.1"
+
+[[example]]
+name = "bip32"
+
+[[example]]
+name = "handshake"
+required-features = ["std"]
+
+[[example]]
+name = "ecdsa-psbt"
+required-features = ["std", "bitcoinconsensus"]
+
+[[example]]
+name = "taproot-psbt"
+required-features = ["std", "rand-std", "bitcoinconsensus"]
diff --git a/dash/build.rs b/dash/build.rs
new file mode 100644
index 000000000..4621b7f12
--- /dev/null
+++ b/dash/build.rs
@@ -0,0 +1,31 @@
+fn main() {
+    let rustc = std::env::var_os("RUSTC").unwrap_or_else(|| "rustc".into());
+    let output = std::process::Command::new(rustc)
+        .arg("--version")
+        .output()
+        .expect("Failed to run rustc --version");
+    assert!(output.status.success(), "Failed to get rust version");
+    let stdout = String::from_utf8(output.stdout).expect("rustc produced non-UTF-8 output");
+    let version_prefix = "rustc ";
+    if !stdout.starts_with(version_prefix) {
+        panic!("unexpected rustc output: {}", stdout);
+    }
+
+    let version = &stdout[version_prefix.len()..];
+    let end = version.find(&[' ', '-'] as &[_]).unwrap_or(version.len());
+    let version = &version[..end];
+    let mut version_components = version.split('.');
+    let major = version_components.next().unwrap();
+    assert_eq!(major, "1", "Unexpected Rust version");
+    let minor = version_components
+        .next()
+        .unwrap_or("0")
+        .parse::<u64>()
+        .expect("invalid Rust minor version");
+
+    for activate_version in &[53, 60] {
+        if minor >= *activate_version {
+            println!("cargo:rustc-cfg=rust_v_1_{}", activate_version);
+        }
+    }
+}
diff --git a/contrib/act/event.json b/dash/contrib/act/event.json
similarity index 100%
rename from contrib/act/event.json
rename to dash/contrib/act/event.json
diff --git a/dash/contrib/test.sh b/dash/contrib/test.sh
new file mode 100755
index 000000000..2a19cb731
--- /dev/null
+++ b/dash/contrib/test.sh
@@ -0,0 +1,147 @@
+#!/bin/sh
+
+set -ex
+
+FEATURES="base64 bitcoinconsensus serde rand secp-recovery"
+
+if [ "$DO_COV" = true ]
+then
+    export RUSTFLAGS="-C link-dead-code"
+fi
+
+cargo --version
+rustc --version
+
+# Some tests require certain toolchain types.
+NIGHTLY=false
+STABLE=true
+if cargo --version | grep nightly; then
+    STABLE=false
+    NIGHTLY=true
+fi
+if cargo --version | grep beta; then
+    STABLE=false
+fi
+
+# Pin dependencies as required if we are using MSRV toolchain.
+if cargo --version | grep "1\.48"; then
+    # 1.0.157 uses syn 2.0 which requires edition 2018
+    cargo update -p serde --precise 1.0.156
+fi
+
+# TODO disable this for now, it's broken
+# We should not have any duplicate dependencies. This catches mistakes made upgrading dependencies
+# in one crate and not in another (e.g. upgrade bitcoin_hashes in bitcoin but not in secp).
+#duplicate_dependencies=$(
+#    # Only show the actual duplicated deps, not their reverse tree, then
+#    # whitelist the 'syn' crate which is duplicated but it's not our fault.
+#    cargo tree  --target=all --all-features --duplicates \
+#        | grep '^[0-9A-Za-z]' \
+#        | grep -v 'syn' \
+#        | wc -l
+#)
+#if [ "$duplicate_dependencies" -ne 0 ]; then
+#    echo "Dependency tree is broken, contains duplicates"
+#    cargo tree  --target=all --all-features --duplicates
+#    exit 1
+#fi
+
+if [ "$DO_LINT" = true ]
+then
+    cargo clippy --all-features --all-targets -- -D warnings
+    cargo clippy --example bip32 -- -D warnings
+    cargo clippy --example handshake --features=rand-std -- -D warnings
+    cargo clippy --example ecdsa-psbt --features=bitcoinconsensus -- -D warnings
+    cargo clippy --example taproot-psbt --features=rand-std,bitcoinconsensus -- -D warnings
+fi
+
+echo "********* Testing std *************"
+# Test without any features other than std first
+cargo test --verbose --no-default-features --features="std"
+
+echo "********* Testing default *************"
+# Then test with the default features
+cargo test --verbose
+
+if [ "$DO_NO_STD" = true ]
+then
+    echo "********* Testing no-std build *************"
+    # Build no_std, to make sure that cfg(test) doesn't hide any issues
+    cargo build --verbose --features="no-std" --no-default-features
+
+    # Build std + no_std, to make sure they are not incompatible
+    cargo build --verbose --features="no-std"
+
+    # Test no_std
+    cargo test --verbose --features="no-std" --no-default-features
+
+    # Build all features
+    cargo build --verbose --features="no-std $FEATURES" --no-default-features
+
+    # Build specific features
+    for feature in ${FEATURES}
+    do
+        cargo build --verbose --features="no-std $feature" --no-default-features
+    done
+
+    cargo run --example bip32 7934c09359b234e076b9fa5a1abfd38e3dc2a9939745b7cc3c22a48d831d14bd
+    cargo run --no-default-features --features no-std --example bip32 7934c09359b234e076b9fa5a1abfd38e3dc2a9939745b7cc3c22a48d831d14bd
+fi
+
+# Test each feature
+for feature in ${FEATURES}
+do
+    echo "********* Testing $feature *************"
+    cargo test --verbose --features="$feature"
+done
+
+# TODO need to fix these examples to support dash keys and addresses
+#cargo run --example ecdsa-psbt --features=bitcoinconsensus
+#cargo run --example taproot-psbt --features=rand-std,bitcoinconsensus
+
+# Build the docs if told to (this only works with the nightly toolchain)
+if [ "$DO_DOCSRS" = true ]; then
+    RUSTDOCFLAGS="--cfg docsrs -D warnings -D rustdoc::broken-intra-doc-links" cargo +nightly doc --all-features
+fi
+
+# Build the docs with a stable toolchain, in unison with the DO_DOCSRS command
+# above this checks that we feature guarded docs imports correctly.
+if [ "$DO_DOCS" = true ]; then
+    RUSTDOCFLAGS="-D warnings" cargo +stable doc --all-features
+fi
+
+# Run formatter if told to.
+if [ "$DO_FMT" = true ]; then
+    if [ "$NIGHTLY" = false ]; then
+        echo "DO_FMT requires a nightly toolchain (consider using RUSTUP_TOOLCHAIN)"
+        exit 1
+    fi
+    rustup component add rustfmt
+    cargo fmt --check
+fi
+
+# Bench if told to, only works with non-stable toolchain (nightly, beta).
+if [ "$DO_BENCH" = true ]
+then
+    if [ "$STABLE" = true ]; then
+        if [ -n "$RUSTUP_TOOLCHAIN" ]; then
+            echo "RUSTUP_TOOLCHAIN is set to a stable toolchain but DO_BENCH requires a non-stable (beta, nightly) toolchain"
+        else
+            echo "DO_BENCH requires a non-stable (beta, nightly) toolchain"
+        fi
+        exit 1
+    fi
+    RUSTFLAGS='--cfg=bench' cargo bench
+fi
+
+# Use as dependency if told to
+if [ "$AS_DEPENDENCY" = true ]
+then
+    cargo new dep_test 2> /dev/null # Mute warning about workspace, fixed below.
+    cd dep_test
+    echo 'dashcore = { path = "..", features = ["serde"] }\n\n' >> Cargo.toml
+    # Adding an empty workspace section excludes this crate from the rust-bitcoin workspace.
+    echo '[workspace]\n\n' >> Cargo.toml
+
+    cargo test --verbose
+fi
diff --git a/dash/embedded/Cargo.lock b/dash/embedded/Cargo.lock
new file mode 100644
index 000000000..cd3d81b70
--- /dev/null
+++ b/dash/embedded/Cargo.lock
@@ -0,0 +1,398 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aligned"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a785a543aea40f5e4e2e93bb2655d31bc21bb391fff65697150973e383f16bb"
+dependencies = [
+ "as-slice",
+]
+
+[[package]]
+name = "alloc-cortex-m"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5069e21ec61f3b243a4a4c56d920d3206e6ee86022a67c23e9fe36eb60fc1efd"
+dependencies = [
+ "cortex-m 0.7.5",
+ "linked_list_allocator",
+]
+
+[[package]]
+name = "anyhow"
+version = "1.0.71"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c7d0618f0e0b7e8ff11427422b64564d5fb0be1940354bfe2e0529b18a9d9b8"
+
+[[package]]
+name = "as-slice"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "45403b49e3954a4b8428a0ac21a4b7afadccf92bfd96273f1a58cd4812496ae0"
+dependencies = [
+ "generic-array 0.12.4",
+ "generic-array 0.13.3",
+ "generic-array 0.14.6",
+ "stable_deref_trait",
+]
+
+[[package]]
+name = "bare-metal"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5deb64efa5bd81e31fcd1938615a6d98c82eafcbcd787162b6f63b91d6bac5b3"
+dependencies = [
+ "rustc_version",
+]
+
+[[package]]
+name = "bech32"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d86b93f97252c47b41663388e6d155714a9d0c398b99f1005cbc5f978b29f445"
+
+[[package]]
+name = "bitcoin-private"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73290177011694f38ec25e165d0387ab7ea749a4b81cd4c80dae5988229f7a57"
+
+[[package]]
+name = "bitcoin_hashes"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d7066118b13d4b20b23645932dfb3a81ce7e29f95726c2036fa33cd7b092501"
+dependencies = [
+ "bitcoin-private",
+]
+
+[[package]]
+name = "bitfield"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46afbd2983a5d5a7bd740ccb198caf5b82f45c40c09c0eed36052d91cb92e719"
+
+[[package]]
+name = "cc"
+version = "1.0.73"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11"
+
+[[package]]
+name = "core2"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "239fa3ae9b63c2dc74bd3fa852d4792b8b305ae64eeede946265b6af62f1fff3"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "cortex-m"
+version = "0.6.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9075300b07c6a56263b9b582c214d0ff037b00d45ec9fde1cc711490c56f1bb9"
+dependencies = [
+ "aligned",
+ "bare-metal",
+ "bitfield",
+ "cortex-m 0.7.5",
+ "volatile-register",
+]
+
+[[package]]
+name = "cortex-m"
+version = "0.7.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd20d4ac4aa86f4f75f239d59e542ef67de87cce2c282818dc6e84155d3ea126"
+dependencies = [
+ "bare-metal",
+ "bitfield",
+ "embedded-hal",
+ "volatile-register",
+]
+
+[[package]]
+name = "cortex-m-rt"
+version = "0.6.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "454f278bf469e2de0a4d22ea019d169d8944f86957c8207a39e3f66c32be2fc6"
+dependencies = [
+ "cortex-m-rt-macros",
+ "r0",
+]
+
+[[package]]
+name = "cortex-m-rt-macros"
+version = "0.6.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c8e3aa52243e26f5922fa522b0814019e0c98fc567e2756d715dce7ad7a81f49"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "cortex-m-semihosting"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6bffa6c1454368a6aa4811ae60964c38e6996d397ff8095a8b9211b1c1f749bc"
+dependencies = [
+ "cortex-m 0.7.5",
+]
+
+[[package]]
+name = "dashcore"
+version = "0.30.0"
+dependencies = [
+ "anyhow",
+ "bech32",
+ "core2",
+ "dashcore-private",
+ "dashcore_hashes",
+ "hex",
+ "hex_lit",
+ "rustversion",
+ "secp256k1",
+]
+
+[[package]]
+name = "dashcore-private"
+version = "0.1.0"
+
+[[package]]
+name = "dashcore_hashes"
+version = "0.12.0"
+dependencies = [
+ "core2",
+ "dashcore-private",
+ "secp256k1",
+]
+
+[[package]]
+name = "embedded"
+version = "0.1.0"
+dependencies = [
+ "alloc-cortex-m",
+ "cortex-m 0.6.7",
+ "cortex-m-rt",
+ "cortex-m-semihosting",
+ "dashcore",
+ "panic-halt",
+]
+
+[[package]]
+name = "embedded-hal"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35949884794ad573cf46071e41c9b60efb0cb311e3ca01f7af807af1debc66ff"
+dependencies = [
+ "nb 0.1.3",
+ "void",
+]
+
+[[package]]
+name = "generic-array"
+version = "0.12.4"
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+checksum = "ffdf9f34f1447443d37393cc6c2b8313aebddcd96906caf34e54c68d8e57d7bd"
+dependencies = [
+ "typenum",
+]
+
+[[package]]
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+checksum = "f797e67af32588215eaaab8327027ee8e71b9dd0b2b26996aedf20c030fce309"
+dependencies = [
+ "typenum",
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+[[package]]
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+checksum = "bff49e947297f3312447abdca79f45f4738097cc82b06e72054d2223f601f1b9"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
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+checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
+
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+ "unicode-ident",
+]
+
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+checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
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+ "semver",
+]
+
+[[package]]
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+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25996b82292a7a57ed3508f052cfff8640d38d32018784acd714758b43da9c8f"
+dependencies = [
+ "bitcoin_hashes",
+ "secp256k1-sys",
+]
+
+[[package]]
+name = "secp256k1-sys"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70a129b9e9efbfb223753b9163c4ab3b13cff7fd9c7f010fbac25ab4099fa07e"
+dependencies = [
+ "cc",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
+dependencies = [
+ "semver-parser",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
+
+[[package]]
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+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "typenum"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dcf81ac59edc17cc8697ff311e8f5ef2d99fcbd9817b34cec66f90b6c3dfd987"
+
+[[package]]
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+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
+[[package]]
+name = "vcell"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77439c1b53d2303b20d9459b1ade71a83c716e3f9c34f3228c00e6f185d6c002"
+
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
+
+[[package]]
+name = "volatile-register"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ee8f19f9d74293faf70901bc20ad067dc1ad390d2cbf1e3f75f721ffee908b6"
+dependencies = [
+ "vcell",
+]
diff --git a/embedded/Cargo.toml b/dash/embedded/Cargo.toml
similarity index 70%
rename from embedded/Cargo.toml
rename to dash/embedded/Cargo.toml
index c2ddb0f31..32adaa275 100644
--- a/embedded/Cargo.toml
+++ b/dash/embedded/Cargo.toml
@@ -5,13 +5,17 @@ readme = "README.md"
 name = "embedded"
 version = "0.1.0"
 
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
 [dependencies]
 cortex-m = "0.6.0"
 cortex-m-rt = "0.6.10"
 cortex-m-semihosting = "0.3.3"
 panic-halt = "0.2.0"
 alloc-cortex-m = "0.4.1"
-dashcore = { path="../", default-features = false, features = ["no-std", "secp-lowmemory"] }
+dashcore = { path="..", default-features = false, features = ["no-std", "secp-lowmemory"] }
 
 [[bin]]
 name = "embedded"
@@ -22,3 +26,6 @@ bench = false
 codegen-units = 1 # better optimizations
 debug = true # symbols are nice and they don't increase the size on Flash
 lto = true # better optimizations
+
+[patch.crates-io.dashcore_hashes]
+path = "../../hashes"
diff --git a/embedded/README.md b/dash/embedded/README.md
similarity index 100%
rename from embedded/README.md
rename to dash/embedded/README.md
diff --git a/embedded/memory.x b/dash/embedded/memory.x
similarity index 100%
rename from embedded/memory.x
rename to dash/embedded/memory.x
diff --git a/embedded/scripts/env.sh b/dash/embedded/scripts/env.sh
similarity index 100%
rename from embedded/scripts/env.sh
rename to dash/embedded/scripts/env.sh
diff --git a/embedded/scripts/install-deps b/dash/embedded/scripts/install-deps
similarity index 100%
rename from embedded/scripts/install-deps
rename to dash/embedded/scripts/install-deps
diff --git a/embedded/src/main.rs b/dash/embedded/src/main.rs
similarity index 100%
rename from embedded/src/main.rs
rename to dash/embedded/src/main.rs
diff --git a/examples/bip32.rs b/dash/examples/bip32.rs
similarity index 91%
rename from examples/bip32.rs
rename to dash/examples/bip32.rs
index 3200f67b3..192956666 100644
--- a/examples/bip32.rs
+++ b/dash/examples/bip32.rs
@@ -5,11 +5,11 @@ use std::str::FromStr;
 
 use dashcore::secp256k1::Secp256k1;
 use dashcore::PublicKey;
-use dashcore::util::bip32::ExtendedPrivKey;
-use dashcore::util::bip32::ExtendedPubKey;
-use dashcore::util::bip32::DerivationPath;
-use dashcore::util::bip32::ChildNumber;
-use dashcore::util::address::Address;
+use dashcore::bip32::ExtendedPrivKey;
+use dashcore::bip32::ExtendedPubKey;
+use dashcore::bip32::DerivationPath;
+use dashcore::bip32::ChildNumber;
+use dashcore::address::Address;
 use dashcore::secp256k1::ffi::types::AlignedType;
 use dashcore::hashes::hex::FromHex;
 
diff --git a/dash/examples/ecdsa-psbt.rs b/dash/examples/ecdsa-psbt.rs
new file mode 100644
index 000000000..5d0907a14
--- /dev/null
+++ b/dash/examples/ecdsa-psbt.rs
@@ -0,0 +1,296 @@
+//! Implements an example PSBT workflow.
+//!
+//! The workflow we simulate is that of a setup using a watch-only online wallet (contains only
+//! public keys) and a cold-storage signing wallet (contains the private keys).
+//!
+//! You can verify the workflow using `dashd` and `dash-cli`.
+//!
+//! ## Example Setup
+//!
+//! 1. Start dash Core in Regtest mode, for example:
+//!
+//!    `dashd -regtest -server -daemon -fallbackfee=0.0002 -rpcuser=admin -rpcpassword=pass -rpcallowip=127.0.0.1/0 -rpcbind=127.0.0.1 -blockfilterindex=1 -peerblockfilters=1`
+//!
+//! 2. Define a shell alias to `dash-cli`, for example:
+//!
+//!    `alias bt=dash-cli -rpcuser=admin -rpcpassword=pass -rpcport=18443`
+//!
+//! 3. Create (or load) a default wallet, for example:
+//!
+//!    `bt createwallet <wallet-name>`
+//!
+//! 4. Mine some blocks, for example:
+//!
+//!    `bt generatetoaddress 110 $(bt getnewaddress)`
+//!
+//! 5. Get the details for a UTXO to fund the PSBT with:
+//!
+//!    `bt listunspent`
+//!
+
+use std::boxed::Box;
+use std::collections::BTreeMap;
+use std::fmt;
+use std::str::FromStr;
+
+use dashcore::bip32::{
+    ChildNumber, DerivationPath, ExtendedPrivKey, ExtendedPubKey, Fingerprint, IntoDerivationPath,
+};
+use dashcore::consensus::encode;
+use dashcore::psbt::{self, Input, Psbt, PsbtSighashType};
+use dashcore::secp256k1::{Secp256k1, Signing, Verification};
+use dashcore::{
+    Address, Amount, Network, OutPoint, PublicKey, ScriptBuf, Transaction, TxIn, TxOut,
+    Witness,
+};
+
+type Result<T> = std::result::Result<T, Error>;
+
+// Get this from the output of `bt dumpwallet <file>`.
+const EXTENDED_MASTER_PRIVATE_KEY: &str = "tprv8ZgxMBicQKsPeSHZFZWT8zxie2dXWcwemnTkf4grVzMvP2UABUxqbPTCHzZ4ztwhBghpfFw27sJqEgW6y1ZTZcfvCUdtXE1L6qMF7TBdbqQ";
+
+// Set these with valid data from output of step 5 above. Please note, input utxo must be a p2wpkh.
+const INPUT_UTXO_TXID: &str = "295f06639cde6039bf0c3dbf4827f0e3f2b2c2b476408e2f9af731a8d7a9c7fb";
+const INPUT_UTXO_VOUT: u32 = 0;
+const INPUT_UTXO_SCRIPT_PUBKEY: &str = "00149891eeb8891b3e80a2a1ade180f143add23bf5de";
+const INPUT_UTXO_VALUE: &str = "50 BTC";
+// Get this from the desciptor,
+// "wpkh([97f17dca/0'/0'/0']02749483607dafb30c66bd93ece4474be65745ce538c2d70e8e246f17e7a4e0c0c)#m9n56cx0".
+const INPUT_UTXO_DERIVATION_PATH: &str = "m/0h/0h/0h";
+
+// Grab an address to receive on: `bt generatenewaddress` (obviously contrived but works as an example).
+const RECEIVE_ADDRESS: &str = "bcrt1qcmnpjjjw78yhyjrxtql6lk7pzpujs3h244p7ae"; // The address to receive the coins we send.
+
+// These should be correct if the UTXO above should is for 50 BTC.
+const OUTPUT_AMOUNT_BTC: &str = "1 BTC";
+const CHANGE_AMOUNT_BTC: &str = "48.99999 BTC"; // 1000 sat transaction fee.
+
+const NETWORK: Network = Network::Regtest;
+
+fn main() -> Result<()> {
+    let secp = Secp256k1::new();
+
+    let (offline, fingerprint, account_0_xpub, input_xpub) =
+        ColdStorage::new(&secp, EXTENDED_MASTER_PRIVATE_KEY)?;
+
+    let online = WatchOnly::new(account_0_xpub, input_xpub, fingerprint);
+
+    let created = online.create_psbt(&secp)?;
+    let updated = online.update_psbt(created)?;
+
+    let signed = offline.sign_psbt(&secp, updated)?;
+
+    let finalized = online.finalize_psbt(signed)?;
+
+    // You can use `bt sendrawtransaction` to broadcast the extracted transaction.
+    let tx = finalized.extract_tx();
+    tx.verify(|_| Some(previous_output())).expect("failed to verify transaction");
+
+    let hex = encode::serialize_hex(&tx);
+    println!("You should now be able to broadcast the following transaction: \n\n{}", hex);
+
+    Ok(())
+}
+
+// We cache the pubkeys for convenience because it requires a scep context to convert the private key.
+/// An example of an offline signer i.e., a cold-storage device.
+struct ColdStorage {
+    /// The master extended private key.
+    master_xpriv: ExtendedPrivKey,
+    /// The master extended public key.
+    master_xpub: ExtendedPubKey,
+}
+
+/// The data exported from an offline wallet to enable creation of a watch-only online wallet.
+/// (wallet, fingerprint, account_0_xpub, input_utxo_xpub)
+type ExportData = (ColdStorage, Fingerprint, ExtendedPubKey, ExtendedPubKey);
+
+impl ColdStorage {
+    /// Constructs a new `ColdStorage` signer.
+    ///
+    /// # Returns
+    ///
+    /// The newly created signer along with the data needed to configure a watch-only wallet.
+    fn new<C: Signing>(secp: &Secp256k1<C>, xpriv: &str) -> Result<ExportData> {
+        let master_xpriv = ExtendedPrivKey::from_str(xpriv)?;
+        let master_xpub = ExtendedPubKey::from_priv(secp, &master_xpriv);
+
+        // Hardened children require secret data to derive.
+
+        let path = "m/84h/0h/0h".into_derivation_path()?;
+        let account_0_xpriv = master_xpriv.derive_priv(secp, &path)?;
+        let account_0_xpub = ExtendedPubKey::from_priv(secp, &account_0_xpriv);
+
+        let path = INPUT_UTXO_DERIVATION_PATH.into_derivation_path()?;
+        let input_xpriv = master_xpriv.derive_priv(secp, &path)?;
+        let input_xpub = ExtendedPubKey::from_priv(secp, &input_xpriv);
+
+        let wallet = ColdStorage { master_xpriv, master_xpub };
+        let fingerprint = wallet.master_fingerprint();
+
+        Ok((wallet, fingerprint, account_0_xpub, input_xpub))
+    }
+
+    /// Returns the fingerprint for the master extended public key.
+    fn master_fingerprint(&self) -> Fingerprint { self.master_xpub.fingerprint() }
+
+    /// Signs `psbt` with this signer.
+    fn sign_psbt<C: Signing>(&self, secp: &Secp256k1<C>, mut psbt: Psbt) -> Result<Psbt> {
+        match psbt.sign(&self.master_xpriv, secp) {
+            Ok(keys) => assert_eq!(keys.len(), 1),
+            Err((_, e)) => {
+                let e = e.get(&0).expect("at least one error");
+                return Err(e.clone().into());
+            }
+        };
+        Ok(psbt)
+    }
+}
+
+/// An example of an watch-only online wallet.
+struct WatchOnly {
+    /// The xpub for account 0 derived from derivation path "m/84h/0h/0h".
+    account_0_xpub: ExtendedPubKey,
+    /// The xpub derived from `INPUT_UTXO_DERIVATION_PATH`.
+    input_xpub: ExtendedPubKey,
+    /// The master extended pubkey fingerprint.
+    master_fingerprint: Fingerprint,
+}
+
+impl WatchOnly {
+    /// Constructs a new watch-only wallet.
+    ///
+    /// A watch-only wallet would typically be online and connected to the dash network. We
+    /// 'import' into the wallet the `account_0_xpub` and `master_fingerprint`.
+    ///
+    /// The reason for importing the `input_xpub` is so one can use dashd to grab a valid input
+    /// to verify the workflow presented in this file.
+    fn new(
+        account_0_xpub: ExtendedPubKey,
+        input_xpub: ExtendedPubKey,
+        master_fingerprint: Fingerprint,
+    ) -> Self {
+        WatchOnly { account_0_xpub, input_xpub, master_fingerprint }
+    }
+
+    /// Creates the PSBT, in BIP174 parlance this is the 'Creater'.
+    fn create_psbt<C: Verification>(&self, secp: &Secp256k1<C>) -> Result<Psbt> {
+        let to_address = Address::from_str(RECEIVE_ADDRESS)?.require_network(Network::Regtest)?;
+        let to_amount = Amount::from_str(OUTPUT_AMOUNT_BTC)?;
+
+        let (_, change_address, _) = self.change_address(secp)?;
+        let change_amount = Amount::from_str(CHANGE_AMOUNT_BTC)?;
+
+        let tx = Transaction {
+            version: 2,
+            lock_time: 0,
+            input: vec![TxIn {
+                previous_output: OutPoint { txid: INPUT_UTXO_TXID.parse()?, vout: INPUT_UTXO_VOUT },
+                script_sig: ScriptBuf::new(),
+                sequence: u32::MAX, // Disable LockTime and RBF.
+                witness: Witness::default(),
+            }],
+            output: vec![
+                TxOut { value: to_amount.to_sat(), script_pubkey: to_address.script_pubkey() },
+                TxOut {
+                    value: change_amount.to_sat(),
+                    script_pubkey: change_address.script_pubkey(),
+                },
+            ],
+            special_transaction_payload: None,
+        };
+
+        let psbt = Psbt::from_unsigned_tx(tx)?;
+
+        Ok(psbt)
+    }
+
+    /// Updates the PSBT, in BIP174 parlance this is the 'Updater'.
+    fn update_psbt(&self, mut psbt: Psbt) -> Result<Psbt> {
+        let mut input = Input { witness_utxo: Some(previous_output()), ..Default::default() };
+
+        let pk = self.input_xpub.to_pub();
+        let wpkh = pk.wpubkey_hash().expect("a compressed pubkey");
+
+        let redeem_script = ScriptBuf::new_v0_p2wpkh(&wpkh);
+        input.redeem_script = Some(redeem_script);
+
+        let fingerprint = self.master_fingerprint;
+        let path = input_derivation_path()?;
+        let mut map = BTreeMap::new();
+        map.insert(pk.inner, (fingerprint, path));
+        input.bip32_derivation = map;
+
+        let ty = PsbtSighashType::from_str("SIGHASH_ALL")?;
+        input.sighash_type = Some(ty);
+
+        psbt.inputs = vec![input];
+
+        Ok(psbt)
+    }
+
+    /// Finalizes the PSBT, in BIP174 parlance this is the 'Finalizer'.
+    /// This is just an example. For a production-ready PSBT Finalizer, use [rust-miniscript](https://docs.rs/miniscript/latest/miniscript/psbt/trait.PsbtExt.html#tymethod.finalize)
+    fn finalize_psbt(&self, mut psbt: Psbt) -> Result<Psbt> {
+        if psbt.inputs.is_empty() {
+            return Err(psbt::SignError::MissingInputUtxo.into());
+        }
+
+        let sigs: Vec<_> = psbt.inputs[0].partial_sigs.values().collect();
+        let mut script_witness: Witness = Witness::new();
+        script_witness.push(&sigs[0].to_vec());
+        script_witness.push(self.input_xpub.to_pub().to_bytes());
+
+        psbt.inputs[0].final_script_witness = Some(script_witness);
+
+        // Clear all the data fields as per the spec.
+        psbt.inputs[0].partial_sigs = BTreeMap::new();
+        psbt.inputs[0].sighash_type = None;
+        psbt.inputs[0].redeem_script = None;
+        psbt.inputs[0].witness_script = None;
+        psbt.inputs[0].bip32_derivation = BTreeMap::new();
+
+        Ok(psbt)
+    }
+
+    /// Returns data for the first change address (standard BIP84 derivation path
+    /// "m/84h/0h/0h/1/0"). A real wallet would have access to the chain so could determine if an
+    /// address has been used or not. We ignore this detail and just re-use the first change address
+    /// without loss of generality.
+    fn change_address<C: Verification>(
+        &self,
+        secp: &Secp256k1<C>,
+    ) -> Result<(PublicKey, Address, DerivationPath)> {
+        let path = [ChildNumber::from_normal_idx(1)?, ChildNumber::from_normal_idx(0)?];
+        let derived = self.account_0_xpub.derive_pub(secp, &path)?;
+
+        let pk = derived.to_pub();
+        let addr = Address::p2wpkh(&pk, NETWORK)?;
+        let path = path.into_derivation_path()?;
+
+        Ok((pk, addr, path))
+    }
+}
+
+fn input_derivation_path() -> Result<DerivationPath> {
+    let path = INPUT_UTXO_DERIVATION_PATH.into_derivation_path()?;
+    Ok(path)
+}
+
+fn previous_output() -> TxOut {
+    let script_pubkey = ScriptBuf::from_hex(INPUT_UTXO_SCRIPT_PUBKEY)
+        .expect("failed to parse input utxo scriptPubkey");
+    let amount = Amount::from_str(INPUT_UTXO_VALUE).expect("failed to parse input utxo value");
+
+    TxOut { value: amount.to_sat(), script_pubkey }
+}
+
+struct Error(Box<dyn std::error::Error>);
+
+impl<T: std::error::Error + 'static> From<T> for Error {
+    fn from(e: T) -> Self { Error(Box::new(e)) }
+}
+
+impl fmt::Debug for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { fmt::Debug::fmt(&self.0, f) }
+}
diff --git a/examples/handshake.rs b/dash/examples/handshake.rs
similarity index 100%
rename from examples/handshake.rs
rename to dash/examples/handshake.rs
diff --git a/dash/examples/taproot-psbt.rs b/dash/examples/taproot-psbt.rs
new file mode 100644
index 000000000..45e1e023c
--- /dev/null
+++ b/dash/examples/taproot-psbt.rs
@@ -0,0 +1,757 @@
+//! Example of taproot PSBT workflow
+
+// We use the alias `alias bt='bitcoin-cli -regtest'` for brevity.
+
+// Step 0 - Wipe the `regtest` data directory to start from a clean slate.
+
+// Step 1 - Run `bitcoind -regtest -daemon` to start the daemon. Bitcoin Core 23.0+ is required.
+
+// Step 2 -
+//          2.1) Run `bt -named createwallet wallet_name=benefactor blank=true` to create a blank wallet with the name "benefactor"
+//          2.2) Run `bt -named createwallet wallet_name=beneficiary blank=true` to create a blank wallet with the name "beneficiary"
+//          2.3) Create the two aliases:
+//                  alias bt-benefactor='bitcoin-cli -regtest -rpcwallet=benefactor'
+//                  alias bt-beneficiary='bitcoin-cli -regtest -rpcwallet=beneficiary'
+//
+//          2.4) Import the example descriptors:
+//                  bt-benefactor importdescriptors '[
+//                     { "desc": "tr(tprv8ZgxMBicQKsPd4arFr7sKjSnKFDVMR2JHw9Y8L9nXN4kiok4u28LpHijEudH3mMYoL4pM5UL9Bgdz2M4Cy8EzfErmU9m86ZTw6hCzvFeTg7/86\'/1\'/0\'/1/*)#jzyeered", "active": true, "timestamp": "now", "internal": true },
+//                     { "desc": "tr(tprv8ZgxMBicQKsPd4arFr7sKjSnKFDVMR2JHw9Y8L9nXN4kiok4u28LpHijEudH3mMYoL4pM5UL9Bgdz2M4Cy8EzfErmU9m86ZTw6hCzvFeTg7/86\'/1\'/0\'/0/*)#rkpcykf4", "active": true, "timestamp": "now" }
+//                  ]'
+//                  bt-beneficiary importdescriptors '[
+//                     { "desc": "tr(tprv8ZgxMBicQKsPe72C5c3cugP8b7AzEuNjP4NSC17Dkpqk5kaAmsL6FHwPsVxPpURVqbNwdLAbNqi8Cvdq6nycDwYdKHDjDRYcsMzfshimAUq/86\'/1\'/0\'/1/*)#w4ehwx46", "active": true, "timestamp": "now", "internal": true },
+//                     { "desc": "tr(tprv8ZgxMBicQKsPe72C5c3cugP8b7AzEuNjP4NSC17Dkpqk5kaAmsL6FHwPsVxPpURVqbNwdLAbNqi8Cvdq6nycDwYdKHDjDRYcsMzfshimAUq/86\'/1\'/0\'/0/*)#lpuknn9z", "active": true, "timestamp": "now" }
+//                  ]'
+//
+// The xpriv and derivation path from the imported descriptors
+const BENEFACTOR_XPRIV_STR: &str = "tprv8ZgxMBicQKsPd4arFr7sKjSnKFDVMR2JHw9Y8L9nXN4kiok4u28LpHijEudH3mMYoL4pM5UL9Bgdz2M4Cy8EzfErmU9m86ZTw6hCzvFeTg7";
+const BENEFICIARY_XPRIV_STR: &str = "tprv8ZgxMBicQKsPe72C5c3cugP8b7AzEuNjP4NSC17Dkpqk5kaAmsL6FHwPsVxPpURVqbNwdLAbNqi8Cvdq6nycDwYdKHDjDRYcsMzfshimAUq";
+const BIP86_DERIVATION_PATH: &str = "m/86'/1'/0'/0/0";
+
+// Step 3 -
+//          Run `bt generatetoaddress 103 $(bt-benefactor getnewaddress '' bech32m)` to generate 103 new blocks
+//          with block reward being sent to a newly created P2TR address in the `benefactor` wallet.
+//          This will leave us with 3 mature UTXOs that can be spent. Each will be used in a different example below.
+
+// Step 4 - Run `bt-benefactor listunspent` to display our three spendable UTXOs. Check that everything is the same as below
+//        - otherwise modify it. The txids should be deterministic on regtest:
+
+const UTXO_SCRIPT_PUBKEY: &str =
+    "5120be27fa8b1f5278faf82cab8da23e8761f8f9bd5d5ebebbb37e0e12a70d92dd16";
+const UTXO_PUBKEY: &str = "a6ac32163539c16b6b5dbbca01b725b8e8acaa5f821ba42c80e7940062140d19";
+const UTXO_MASTER_FINGERPRINT: &str = "e61b318f";
+const ABSOLUTE_FEES_IN_SATS: u64 = 1000;
+
+// UTXO_1 will be used for spending example 1
+const UTXO_1: P2trUtxo = P2trUtxo {
+    txid: "a85d89b4666fed622281d3589474aa1f87971b54bd5d9c1899ed2e8e0447cc06",
+    vout: 0,
+    script_pubkey: UTXO_SCRIPT_PUBKEY,
+    pubkey: UTXO_PUBKEY,
+    master_fingerprint: UTXO_MASTER_FINGERPRINT,
+    amount_in_sats: 50 * COIN_VALUE, // 50 BTC
+    derivation_path: BIP86_DERIVATION_PATH,
+};
+
+// UTXO_2 will be used for spending example 2
+const UTXO_2: P2trUtxo = P2trUtxo {
+    txid: "6f1c1df5862a67f4b6d1cde9a87e3c441b483ba6a140fbec2815f03aa3a5309d",
+    vout: 0,
+    script_pubkey: UTXO_SCRIPT_PUBKEY,
+    pubkey: UTXO_PUBKEY,
+    master_fingerprint: UTXO_MASTER_FINGERPRINT,
+    amount_in_sats: 50 * COIN_VALUE,
+    derivation_path: BIP86_DERIVATION_PATH,
+};
+
+// UTXO_3 will be used for spending example 3
+const UTXO_3: P2trUtxo = P2trUtxo {
+    txid: "9795fed5aedca219244a396dfd7bce55c851274418383c3ab43530e3f74e5dcc",
+    vout: 0,
+    script_pubkey: UTXO_SCRIPT_PUBKEY,
+    pubkey: UTXO_PUBKEY,
+    master_fingerprint: UTXO_MASTER_FINGERPRINT,
+    amount_in_sats: 50 * COIN_VALUE,
+    derivation_path: BIP86_DERIVATION_PATH,
+};
+
+use std::collections::BTreeMap;
+use std::str::FromStr;
+
+use dashcore::bip32::{ChildNumber, DerivationPath, ExtendedPrivKey, ExtendedPubKey, Fingerprint};
+use dashcore::consensus::encode;
+use dashcore::constants::COIN_VALUE;
+use dashcore::key::{TapTweak, XOnlyPublicKey};
+use dashcore::opcodes::all::{OP_CHECKSIG, OP_CLTV, OP_DROP};
+use dashcore::psbt::{self, Input, Output, Psbt, PsbtSighashType};
+use dashcore::secp256k1::Secp256k1;
+use dashcore::sighash::{self, SighashCache, TapSighash, TapSighashType};
+use dashcore::taproot::{self, LeafVersion, TapLeafHash, TaprootBuilder, TaprootSpendInfo};
+use dashcore::{
+    absolute, script, Address, Amount, Network, OutPoint, ScriptBuf, Transaction, TxIn, TxOut,
+    Witness,
+};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let secp = Secp256k1::new();
+
+    println!("\n----------------");
+    println!("\nSTART EXAMPLE 1 - P2TR with a BIP86 commitment, signed with internal key\n");
+
+    // Just some addresses for outputs from our wallets. Not really important.
+    let to_address =
+        Address::from_str("bcrt1p0p3rvwww0v9znrclp00uneq8ytre9kj922v8fxhnezm3mgsmn9usdxaefc")?
+            .require_network(Network::Regtest)?;
+    let change_address =
+        Address::from_str("bcrt1pz449kexzydh2kaypatup5ultru3ej284t6eguhnkn6wkhswt0l7q3a7j76")?
+            .require_network(Network::Regtest)?;
+    let amount_to_send_in_sats = COIN_VALUE;
+    let change_amount = UTXO_1
+        .amount_in_sats
+        .checked_sub(amount_to_send_in_sats)
+        .and_then(|x| x.checked_sub(ABSOLUTE_FEES_IN_SATS))
+        .ok_or("Fees more than input amount!")?;
+
+    let tx_hex_string = encode::serialize_hex(&generate_bip86_key_spend_tx(
+        &secp,
+        // The master extended private key from the descriptor in step 4
+        ExtendedPrivKey::from_str(BENEFACTOR_XPRIV_STR)?,
+        // Set these fields with valid data for the UTXO from step 5 above
+        UTXO_1,
+        vec![
+            TxOut { value: amount_to_send_in_sats, script_pubkey: to_address.script_pubkey() },
+            TxOut { value: change_amount, script_pubkey: change_address.script_pubkey() },
+        ],
+    )?);
+    println!(
+        "\nYou should now be able to broadcast the following transaction: \n\n{}",
+        tx_hex_string
+    );
+
+    println!("\nEND EXAMPLE 1\n");
+    println!("----------------\n");
+
+    println!("START EXAMPLE 2 - Script path spending of inheritance UTXO\n");
+
+    {
+        let beneficiary =
+            BeneficiaryWallet::new(ExtendedPrivKey::from_str(BENEFICIARY_XPRIV_STR)?)?;
+
+        let mut benefactor = BenefactorWallet::new(
+            ExtendedPrivKey::from_str(BENEFACTOR_XPRIV_STR)?,
+            beneficiary.master_xpub(),
+        )?;
+        let (tx, psbt) = benefactor.create_inheritance_funding_tx(
+            absolute::LockTime::from_height(1000).unwrap(),
+            UTXO_2,
+        )?;
+        let tx_hex = encode::serialize_hex(&tx);
+
+        println!("Inheritance funding tx hex:\n\n{}", tx_hex);
+        // You can now broadcast the transaction hex:
+        // bt sendrawtransaction ...
+        //
+        // And mine a block to confirm the transaction:
+        // bt generatetoaddress 1 $(bt-benefactor getnewaddress '' 'bech32m')
+
+        let spending_tx = beneficiary.spend_inheritance(
+            psbt,
+            absolute::LockTime::from_height(1000).unwrap(),
+            to_address,
+        )?;
+        let spending_tx_hex = encode::serialize_hex(&spending_tx);
+        println!("\nInheritance spending tx hex:\n\n{}", spending_tx_hex);
+        // If you try to broadcast now, the transaction will be rejected as it is timelocked.
+        // First mine 900 blocks so we're sure we are over the 1000 block locktime:
+        // bt generatetoaddress 900 $(bt-benefactor getnewaddress '' 'bech32m')
+        // Then broadcast the transaction with `bt sendrawtransaction ...`
+    }
+
+    println!("\nEND EXAMPLE 2\n");
+    println!("----------------\n");
+
+    println!("START EXAMPLE 3 - Key path spending of inheritance UTXO\n");
+
+    {
+        let beneficiary =
+            BeneficiaryWallet::new(ExtendedPrivKey::from_str(BENEFICIARY_XPRIV_STR)?)?;
+
+        let mut benefactor = BenefactorWallet::new(
+            ExtendedPrivKey::from_str(BENEFACTOR_XPRIV_STR)?,
+            beneficiary.master_xpub(),
+        )?;
+        let (tx, _) = benefactor.create_inheritance_funding_tx(
+            absolute::LockTime::from_height(2000).unwrap(),
+            UTXO_3,
+        )?;
+        let tx_hex = encode::serialize_hex(&tx);
+
+        println!("Inheritance funding tx hex:\n\n{}", tx_hex);
+        // You can now broadcast the transaction hex:
+        // bt sendrawtransaction ...
+        //
+        // And mine a block to confirm the transaction:
+        // bt generatetoaddress 1 $(bt-benefactor getnewaddress '' 'bech32m')
+
+        // At some point we may want to extend the locktime further into the future for the beneficiary.
+        // We can do this by "refreshing" the inheritance transaction as the benefactor. This effectively
+        // spends the inheritance transaction via the key path of the taproot output, and is not encumbered
+        // by the timelock so we can spend it immediately. We set up a new output similar to the first with
+        // a locktime that is 'locktime_delta' blocks greater.
+        let (tx, _) = benefactor.refresh_tx(1000)?;
+        let tx_hex = encode::serialize_hex(&tx);
+
+        println!("\nRefreshed inheritance tx hex:\n\n{}\n", tx_hex);
+
+        println!("\nEND EXAMPLE 3\n");
+        println!("----------------\n");
+    }
+
+    Ok(())
+}
+
+struct P2trUtxo<'a> {
+    txid: &'a str,
+    vout: u32,
+    script_pubkey: &'a str,
+    pubkey: &'a str,
+    master_fingerprint: &'a str,
+    amount_in_sats: u64,
+    derivation_path: &'a str,
+}
+
+fn generate_bip86_key_spend_tx(
+    secp: &secp256k1::Secp256k1<secp256k1::All>,
+    master_xpriv: ExtendedPrivKey,
+    input_utxo: P2trUtxo,
+    outputs: Vec<TxOut>,
+) -> Result<Transaction, Box<dyn std::error::Error>> {
+    let from_amount = input_utxo.amount_in_sats;
+    let input_pubkey = XOnlyPublicKey::from_str(input_utxo.pubkey)?;
+
+    // CREATOR + UPDATER
+    let tx1 = Transaction {
+        version: 2,
+        lock_time: 0,
+        input: vec![TxIn {
+            previous_output: OutPoint { txid: input_utxo.txid.parse()?, vout: input_utxo.vout },
+            script_sig: ScriptBuf::new(),
+            sequence: 0xFFFFFFFF, // Ignore nSequence.
+            witness: Witness::default(),
+        }],
+        output: outputs,
+        special_transaction_payload: None,
+    };
+    let mut psbt = Psbt::from_unsigned_tx(tx1)?;
+
+    let mut origins = BTreeMap::new();
+    origins.insert(
+        input_pubkey,
+        (
+            vec![],
+            (
+                Fingerprint::from_str(input_utxo.master_fingerprint)?,
+                DerivationPath::from_str(input_utxo.derivation_path)?,
+            ),
+        ),
+    );
+
+    let mut input = Input {
+        witness_utxo: {
+            let script_pubkey = ScriptBuf::from_hex(input_utxo.script_pubkey)
+                .expect("failed to parse input utxo scriptPubkey");
+            let amount = Amount::from_sat(from_amount);
+
+            Some(TxOut { value: amount.to_sat(), script_pubkey })
+        },
+        tap_key_origins: origins,
+        ..Default::default()
+    };
+    let ty = PsbtSighashType::from_str("SIGHASH_ALL")?;
+    input.sighash_type = Some(ty);
+    input.tap_internal_key = Some(input_pubkey);
+    psbt.inputs = vec![input];
+
+    // SIGNER
+    let unsigned_tx = psbt.unsigned_tx.clone();
+    psbt.inputs.iter_mut().enumerate().try_for_each::<_, Result<(), Box<dyn std::error::Error>>>(
+        |(vout, input)| {
+            let hash_ty = input
+                .sighash_type
+                .and_then(|psbt_sighash_type| psbt_sighash_type.taproot_hash_ty().ok())
+                .unwrap_or(TapSighashType::All);
+            let hash = SighashCache::new(&unsigned_tx).taproot_key_spend_signature_hash(
+                vout,
+                &sighash::Prevouts::All(&[TxOut {
+                    value: from_amount,
+                    script_pubkey: ScriptBuf::from_hex(input_utxo.script_pubkey)?,
+                }]),
+                hash_ty,
+            )?;
+
+            let (_, (_, derivation_path)) = input
+                .tap_key_origins
+                .get(&input.tap_internal_key.ok_or("Internal key missing in PSBT")?)
+                .ok_or("Missing taproot key origin")?;
+
+            let secret_key = master_xpriv.derive_priv(secp, &derivation_path)?.to_priv().inner;
+            sign_psbt_taproot(
+                &secret_key,
+                input.tap_internal_key.unwrap(),
+                None,
+                input,
+                hash,
+                hash_ty,
+                secp,
+            );
+
+            Ok(())
+        },
+    )?;
+
+    // FINALIZER
+    psbt.inputs.iter_mut().for_each(|input| {
+        let mut script_witness: Witness = Witness::new();
+        script_witness.push(input.tap_key_sig.unwrap().to_vec());
+        input.final_script_witness = Some(script_witness);
+
+        // Clear all the data fields as per the spec.
+        input.partial_sigs = BTreeMap::new();
+        input.sighash_type = None;
+        input.redeem_script = None;
+        input.witness_script = None;
+        input.bip32_derivation = BTreeMap::new();
+    });
+
+    // EXTRACTOR
+    let tx = psbt.extract_tx();
+    tx.verify(|_| {
+        Some(TxOut {
+            value: from_amount,
+            script_pubkey: ScriptBuf::from_hex(input_utxo.script_pubkey).unwrap(),
+        })
+    })
+    .expect("failed to verify transaction");
+
+    Ok(tx)
+}
+
+/// A wallet that allows creating and spending from an inheritance directly via the key path for purposes
+/// of refreshing the inheritance timelock or changing other spending conditions.
+struct BenefactorWallet {
+    master_xpriv: ExtendedPrivKey,
+    beneficiary_xpub: ExtendedPubKey,
+    current_spend_info: Option<TaprootSpendInfo>,
+    next_psbt: Option<Psbt>,
+    secp: Secp256k1<secp256k1::All>,
+    next: ChildNumber,
+}
+
+impl BenefactorWallet {
+    fn new(
+        master_xpriv: ExtendedPrivKey,
+        beneficiary_xpub: ExtendedPubKey,
+    ) -> Result<Self, Box<dyn std::error::Error>> {
+        Ok(Self {
+            master_xpriv,
+            beneficiary_xpub,
+            current_spend_info: None,
+            next_psbt: None,
+            secp: Secp256k1::new(),
+            next: ChildNumber::from_normal_idx(0).expect("Zero is a valid child number"),
+        })
+    }
+
+    fn time_lock_script(
+        locktime: absolute::LockTime,
+        beneficiary_key: XOnlyPublicKey,
+    ) -> ScriptBuf {
+        script::Builder::new()
+            .push_int(locktime.to_consensus_u32() as i64)
+            .push_opcode(OP_CLTV)
+            .push_opcode(OP_DROP)
+            .push_x_only_key(&beneficiary_key)
+            .push_opcode(OP_CHECKSIG)
+            .into_script()
+    }
+
+    fn create_inheritance_funding_tx(
+        &mut self,
+        lock_time: absolute::LockTime,
+        input_utxo: P2trUtxo,
+    ) -> Result<(Transaction, Psbt), Box<dyn std::error::Error>> {
+        if let ChildNumber::Normal { index } = self.next {
+            if index > 0 && self.current_spend_info.is_some() {
+                return Err("Transaction already exists, use refresh_inheritance_timelock to refresh the timelock".into());
+            }
+        }
+        // We use some other derivation path in this example for our inheritance protocol. The important thing is to ensure
+        // that we use an unhardened path so we can make use of xpubs.
+        let derivation_path = DerivationPath::from_str(&format!("m/101/1/0/0/{}", self.next))?;
+        let internal_keypair =
+            self.master_xpriv.derive_priv(&self.secp, &derivation_path)?.to_keypair(&self.secp);
+        let beneficiary_key =
+            self.beneficiary_xpub.derive_pub(&self.secp, &derivation_path)?.to_x_only_pub();
+
+        // Build up the leaf script and combine with internal key into a taproot commitment
+        let script = Self::time_lock_script(lock_time, beneficiary_key);
+        let leaf_hash = script.tapscript_leaf_hash();
+
+        let taproot_spend_info = TaprootBuilder::new()
+            .add_leaf(0, script.clone())?
+            .finalize(&self.secp, internal_keypair.x_only_public_key().0)
+            .expect("Should be finalizable");
+        self.current_spend_info = Some(taproot_spend_info.clone());
+        let script_pubkey = ScriptBuf::new_v1_p2tr(
+            &self.secp,
+            taproot_spend_info.internal_key(),
+            taproot_spend_info.merkle_root(),
+        );
+        let value = input_utxo.amount_in_sats - ABSOLUTE_FEES_IN_SATS;
+
+        // Spend a normal BIP86-like output as an input in our inheritance funding transaction
+        let tx = generate_bip86_key_spend_tx(
+            &self.secp,
+            self.master_xpriv,
+            input_utxo,
+            vec![TxOut { script_pubkey: script_pubkey.clone(), value }],
+        )?;
+
+        // CREATOR + UPDATER
+        let next_tx = Transaction {
+            version: 2,
+            lock_time: lock_time.to_consensus_u32(),
+            input: vec![TxIn {
+                previous_output: OutPoint { txid: tx.txid(), vout: 0 },
+                script_sig: ScriptBuf::new(),
+                sequence: 0xFFFFFFFD, // enable locktime and opt-in RBF
+                witness: Witness::default(),
+            }],
+            output: vec![],
+            special_transaction_payload: None,
+        };
+        let mut next_psbt = Psbt::from_unsigned_tx(next_tx)?;
+        let mut origins = BTreeMap::new();
+        origins.insert(
+            beneficiary_key,
+            (vec![leaf_hash], (self.beneficiary_xpub.fingerprint(), derivation_path.clone())),
+        );
+        origins.insert(
+            internal_keypair.x_only_public_key().0,
+            (vec![], (self.master_xpriv.fingerprint(&self.secp), derivation_path)),
+        );
+        let ty = PsbtSighashType::from_str("SIGHASH_ALL")?;
+        let mut tap_scripts = BTreeMap::new();
+        tap_scripts.insert(
+            taproot_spend_info.control_block(&(script.clone(), LeafVersion::TapScript)).unwrap(),
+            (script, LeafVersion::TapScript),
+        );
+
+        let input = Input {
+            witness_utxo: {
+                let script_pubkey = script_pubkey;
+                let amount = Amount::from_sat(value);
+
+                Some(TxOut { value: amount.to_sat(), script_pubkey })
+            },
+            tap_key_origins: origins,
+            tap_merkle_root: taproot_spend_info.merkle_root(),
+            sighash_type: Some(ty),
+            tap_internal_key: Some(internal_keypair.x_only_public_key().0),
+            tap_scripts,
+            ..Default::default()
+        };
+
+        next_psbt.inputs = vec![input];
+        self.next_psbt = Some(next_psbt.clone());
+
+        self.next.increment()?;
+        Ok((tx, next_psbt))
+    }
+
+    fn refresh_tx(
+        &mut self,
+        lock_time_delta: u32,
+    ) -> Result<(Transaction, Psbt), Box<dyn std::error::Error>> {
+        if let Some(ref spend_info) = self.current_spend_info.clone() {
+            let mut psbt = self.next_psbt.clone().expect("Should have next_psbt");
+            let input = &mut psbt.inputs[0];
+            let input_value = input.witness_utxo.as_ref().unwrap().value;
+            let output_value = input_value - ABSOLUTE_FEES_IN_SATS;
+
+            // We use some other derivation path in this example for our inheritance protocol. The important thing is to ensure
+            // that we use an unhardened path so we can make use of xpubs.
+            let new_derivation_path =
+                DerivationPath::from_str(&format!("m/101/1/0/0/{}", self.next))?;
+            let new_internal_keypair = self
+                .master_xpriv
+                .derive_priv(&self.secp, &new_derivation_path)?
+                .to_keypair(&self.secp);
+            let beneficiary_key =
+                self.beneficiary_xpub.derive_pub(&self.secp, &new_derivation_path)?.to_x_only_pub();
+
+            // Build up the leaf script and combine with internal key into a taproot commitment
+            let lock_time = absolute::LockTime::from_height(
+                psbt.unsigned_tx.lock_time + lock_time_delta,
+            )
+            .unwrap();
+            let script = Self::time_lock_script(lock_time, beneficiary_key);
+            let leaf_hash = script.tapscript_leaf_hash();
+
+            let taproot_spend_info = TaprootBuilder::new()
+                .add_leaf(0, script.clone())?
+                .finalize(&self.secp, new_internal_keypair.x_only_public_key().0)
+                .expect("Should be finalizable");
+            self.current_spend_info = Some(taproot_spend_info.clone());
+            let prevout_script_pubkey = input.witness_utxo.as_ref().unwrap().script_pubkey.clone();
+            let output_script_pubkey = ScriptBuf::new_v1_p2tr(
+                &self.secp,
+                taproot_spend_info.internal_key(),
+                taproot_spend_info.merkle_root(),
+            );
+
+            psbt.unsigned_tx.output =
+                vec![TxOut { script_pubkey: output_script_pubkey.clone(), value: output_value }];
+            psbt.outputs = vec![Output::default()];
+            psbt.unsigned_tx.lock_time = 0;
+
+            let hash_ty = input
+                .sighash_type
+                .and_then(|psbt_sighash_type| psbt_sighash_type.taproot_hash_ty().ok())
+                .unwrap_or(TapSighashType::All);
+            let hash = SighashCache::new(&psbt.unsigned_tx).taproot_key_spend_signature_hash(
+                0,
+                &sighash::Prevouts::All(&[TxOut {
+                    value: input_value,
+                    script_pubkey: prevout_script_pubkey,
+                }]),
+                hash_ty,
+            )?;
+
+            {
+                let (_, (_, derivation_path)) = input
+                    .tap_key_origins
+                    .get(&input.tap_internal_key.ok_or("Internal key missing in PSBT")?)
+                    .ok_or("Missing taproot key origin")?;
+                let secret_key =
+                    self.master_xpriv.derive_priv(&self.secp, &derivation_path)?.to_priv().inner;
+                sign_psbt_taproot(
+                    &secret_key,
+                    spend_info.internal_key(),
+                    None,
+                    input,
+                    hash,
+                    hash_ty,
+                    &self.secp,
+                );
+            }
+
+            // FINALIZER
+            psbt.inputs.iter_mut().for_each(|input| {
+                let mut script_witness: Witness = Witness::new();
+                script_witness.push(input.tap_key_sig.unwrap().to_vec());
+                input.final_script_witness = Some(script_witness);
+
+                // Clear all the data fields as per the spec.
+                input.partial_sigs = BTreeMap::new();
+                input.sighash_type = None;
+                input.redeem_script = None;
+                input.witness_script = None;
+                input.bip32_derivation = BTreeMap::new();
+            });
+
+            // EXTRACTOR
+            let tx = psbt.extract_tx();
+            tx.verify(|_| {
+                Some(TxOut { value: input_value, script_pubkey: output_script_pubkey.clone() })
+            })
+            .expect("failed to verify transaction");
+
+            let next_tx = Transaction {
+                version: 2,
+                lock_time: lock_time.to_consensus_u32(),
+                input: vec![TxIn {
+                    previous_output: OutPoint { txid: tx.txid(), vout: 0 },
+                    script_sig: ScriptBuf::new(),
+                    sequence: 0xFFFFFFFD, // enable locktime and opt-in RBF
+                    witness: Witness::default(),
+                }],
+                output: vec![],
+                special_transaction_payload: None,
+            };
+            let mut next_psbt = Psbt::from_unsigned_tx(next_tx)?;
+            let mut origins = BTreeMap::new();
+            origins.insert(
+                beneficiary_key,
+                (vec![leaf_hash], (self.beneficiary_xpub.fingerprint(), new_derivation_path)),
+            );
+            let ty = PsbtSighashType::from_str("SIGHASH_ALL")?;
+            let mut tap_scripts = BTreeMap::new();
+            tap_scripts.insert(
+                taproot_spend_info
+                    .control_block(&(script.clone(), LeafVersion::TapScript))
+                    .unwrap(),
+                (script, LeafVersion::TapScript),
+            );
+
+            let input = Input {
+                witness_utxo: {
+                    let script_pubkey = output_script_pubkey;
+                    let amount = Amount::from_sat(output_value);
+
+                    Some(TxOut { value: amount.to_sat(), script_pubkey })
+                },
+                tap_key_origins: origins,
+                tap_merkle_root: taproot_spend_info.merkle_root(),
+                sighash_type: Some(ty),
+                tap_internal_key: Some(new_internal_keypair.x_only_public_key().0),
+                tap_scripts,
+                ..Default::default()
+            };
+
+            next_psbt.inputs = vec![input];
+            self.next_psbt = Some(next_psbt.clone());
+
+            self.next.increment()?;
+            Ok((tx, next_psbt))
+        } else {
+            Err("No current_spend_info available. Create an inheritance tx first.".into())
+        }
+    }
+}
+
+/// A wallet that allows spending from an inheritance locked to a P2TR UTXO via a script path
+/// after some expiry using CLTV.
+struct BeneficiaryWallet {
+    master_xpriv: ExtendedPrivKey,
+    secp: secp256k1::Secp256k1<secp256k1::All>,
+}
+
+impl BeneficiaryWallet {
+    fn new(master_xpriv: ExtendedPrivKey) -> Result<Self, Box<dyn std::error::Error>> {
+        Ok(Self { master_xpriv, secp: Secp256k1::new() })
+    }
+
+    fn master_xpub(&self) -> ExtendedPubKey {
+        ExtendedPubKey::from_priv(&self.secp, &self.master_xpriv)
+    }
+
+    fn spend_inheritance(
+        &self,
+        mut psbt: Psbt,
+        lock_time: absolute::LockTime,
+        to_address: Address,
+    ) -> Result<Transaction, Box<dyn std::error::Error>> {
+        let input_value = psbt.inputs[0].witness_utxo.as_ref().unwrap().value;
+        let input_script_pubkey =
+            psbt.inputs[0].witness_utxo.as_ref().unwrap().script_pubkey.clone();
+        psbt.unsigned_tx.lock_time = lock_time.to_consensus_u32();
+        psbt.unsigned_tx.output = vec![TxOut {
+            script_pubkey: to_address.script_pubkey(),
+            value: input_value - ABSOLUTE_FEES_IN_SATS,
+        }];
+        psbt.outputs = vec![Output::default()];
+        let unsigned_tx = psbt.unsigned_tx.clone();
+
+        // SIGNER
+        for (x_only_pubkey, (leaf_hashes, (_, derivation_path))) in
+            &psbt.inputs[0].tap_key_origins.clone()
+        {
+            let secret_key =
+                self.master_xpriv.derive_priv(&self.secp, &derivation_path)?.to_priv().inner;
+            for lh in leaf_hashes {
+                let hash_ty = TapSighashType::All;
+                let hash = SighashCache::new(&unsigned_tx).taproot_script_spend_signature_hash(
+                    0,
+                    &sighash::Prevouts::All(&[TxOut {
+                        value: input_value,
+                        script_pubkey: input_script_pubkey.clone(),
+                    }]),
+                    *lh,
+                    hash_ty,
+                )?;
+                sign_psbt_taproot(
+                    &secret_key,
+                    *x_only_pubkey,
+                    Some(*lh),
+                    &mut psbt.inputs[0],
+                    hash,
+                    hash_ty,
+                    &self.secp,
+                );
+            }
+        }
+
+        // FINALIZER
+        psbt.inputs.iter_mut().for_each(|input| {
+            let mut script_witness: Witness = Witness::new();
+            for (_, signature) in input.tap_script_sigs.iter() {
+                script_witness.push(signature.to_vec());
+            }
+            for (control_block, (script, _)) in input.tap_scripts.iter() {
+                script_witness.push(script.to_bytes());
+                script_witness.push(control_block.serialize());
+            }
+            input.final_script_witness = Some(script_witness);
+
+            // Clear all the data fields as per the spec.
+            input.partial_sigs = BTreeMap::new();
+            input.sighash_type = None;
+            input.redeem_script = None;
+            input.witness_script = None;
+            input.bip32_derivation = BTreeMap::new();
+            input.tap_script_sigs = BTreeMap::new();
+            input.tap_scripts = BTreeMap::new();
+            input.tap_key_sig = None;
+        });
+
+        // EXTRACTOR
+        let tx = psbt.extract_tx();
+        tx.verify(|_| {
+            Some(TxOut { value: input_value, script_pubkey: input_script_pubkey.clone() })
+        })
+        .expect("failed to verify transaction");
+
+        Ok(tx)
+    }
+}
+
+// Lifted and modified from BDK at https://github.com/bitcoindevkit/bdk/blob/8fbe40a9181cc9e22cabfc04d57dac5d459da87d/src/wallet/signer.rs#L469-L503
+
+// Bitcoin Dev Kit
+// Written in 2020 by Alekos Filini <alekos.filini@gmail.com>
+//
+// Copyright (c) 2020-2021 Bitcoin Dev Kit Developers
+//
+// This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
+// or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
+// You may not use this file except in accordance with one or both of these
+// licenses.
+
+// Calling this with `leaf_hash` = `None` will sign for key-spend
+fn sign_psbt_taproot(
+    secret_key: &secp256k1::SecretKey,
+    pubkey: XOnlyPublicKey,
+    leaf_hash: Option<TapLeafHash>,
+    psbt_input: &mut psbt::Input,
+    hash: TapSighash,
+    hash_ty: TapSighashType,
+    secp: &Secp256k1<secp256k1::All>,
+) {
+    let keypair = secp256k1::KeyPair::from_seckey_slice(secp, secret_key.as_ref()).unwrap();
+    let keypair = match leaf_hash {
+        None => keypair.tap_tweak(secp, psbt_input.tap_merkle_root).to_inner(),
+        Some(_) => keypair, // no tweak for script spend
+    };
+
+    let sig = secp.sign_schnorr(&hash.into(), &keypair);
+
+    let final_signature = taproot::Signature { sig, hash_ty };
+
+    if let Some(lh) = leaf_hash {
+        psbt_input.tap_script_sigs.insert((pubkey, lh), final_signature);
+    } else {
+        psbt_input.tap_key_sig = Some(final_signature);
+    }
+}
diff --git a/dash/src/address.rs b/dash/src/address.rs
new file mode 100644
index 000000000..2cf5dbd15
--- /dev/null
+++ b/dash/src/address.rs
@@ -0,0 +1,1917 @@
+// Rust Dash Library
+// Originally written in 2014 by
+//     Andrew Poelstra <apoelstra@wpsoftware.net>
+//     For Dash
+// Updated for Dash in 2022 by
+//     The Dash Core Developers
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Dash addresses.
+//!
+//! Support for ordinary base58 Dash addresses and private keys.
+//!
+//! # Example: creating a new address from a randomly-generated key pair
+//!
+//! ```rust
+//! # #[cfg(feature = "rand-std")] {
+//! use dashcore::{Address, PublicKey, Network};
+//! use dashcore::secp256k1::{rand, Secp256k1};
+//!
+//! // Generate random key pair.
+//! let s = Secp256k1::new();
+//! let public_key = PublicKey::new(s.generate_keypair(&mut rand::thread_rng()).1);
+//!
+//! // Generate pay-to-pubkey-hash address.
+//! let address = Address::p2pkh(&public_key, Network::Dash);
+//! # }
+//! ```
+//!
+//! # Note: creating a new address requires the rand-std feature flag
+//!
+//! ```toml
+//! dashcore = { version = "...", features = ["rand-std"] }
+//! ```
+
+use core::convert::{TryFrom, TryInto};
+use core::fmt;
+use core::marker::PhantomData;
+use core::str::FromStr;
+
+use bech32;
+use hashes::{sha256, Hash, HashEngine};
+use internals::write_err;
+use secp256k1::{Secp256k1, Verification, XOnlyPublicKey};
+
+use crate::base58;
+use crate::blockdata::constants::{
+    MAX_SCRIPT_ELEMENT_SIZE, PUBKEY_ADDRESS_PREFIX_MAIN, PUBKEY_ADDRESS_PREFIX_TEST,
+    SCRIPT_ADDRESS_PREFIX_MAIN, SCRIPT_ADDRESS_PREFIX_TEST,
+};
+use crate::blockdata::opcodes;
+use crate::blockdata::opcodes::all::*;
+use crate::blockdata::script::{
+    self, Instruction, PushBytes, PushBytesBuf, PushBytesErrorReport, Script, ScriptBuf,
+};
+use crate::crypto::key::{PublicKey, TapTweak, TweakedPublicKey, UntweakedPublicKey};
+use crate::error::ParseIntError;
+use crate::hash_types::{PubkeyHash, ScriptHash};
+use crate::network::constants::Network;
+use crate::prelude::*;
+use crate::taproot::TapNodeHash;
+
+/// Address error.
+#[derive(Debug, PartialEq, Eq, Clone)]
+#[non_exhaustive]
+pub enum Error {
+    /// Base58 encoding error.
+    Base58(base58::Error),
+    /// Bech32 encoding error.
+    Bech32(bech32::Error),
+    /// The bech32 payload was empty.
+    EmptyBech32Payload,
+    /// The wrong checksum algorithm was used. See BIP-0350.
+    InvalidBech32Variant {
+        /// Bech32 variant that is required by the used Witness version.
+        expected: bech32::Variant,
+        /// The actual Bech32 variant encoded in the address representation.
+        found: bech32::Variant,
+    },
+    /// Script version must be 0 to 16 inclusive.
+    InvalidWitnessVersion(u8),
+    /// Unable to parse witness version from string.
+    UnparsableWitnessVersion(ParseIntError),
+    /// Dash script opcode does not match any known witness version, the script is malformed.
+    MalformedWitnessVersion,
+    /// The witness program must be between 2 and 40 bytes in length.
+    InvalidWitnessProgramLength(usize),
+    /// A v0 witness program must be either of length 20 or 32.
+    InvalidSegwitV0ProgramLength(usize),
+    /// An uncompressed pubkey was used where it is not allowed.
+    UncompressedPubkey,
+    /// Address size more than 520 bytes is not allowed.
+    ExcessiveScriptSize,
+    /// Script is not a p2pkh, p2sh or witness program.
+    UnrecognizedScript,
+    /// Address type is either invalid or not supported in rust-dashcore.
+    UnknownAddressType(String),
+    /// Address's network differs from required one.
+    NetworkValidation {
+        /// Network that was required.
+        required: Network,
+        /// Network on which the address was found to be valid.
+        found: Network,
+        /// The address itself
+        address: Address<NetworkUnchecked>,
+    },
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Error::Base58(ref e) => write_err!(f, "base58 address encoding error"; e),
+            Error::Bech32(ref e) => write_err!(f, "bech32 address encoding error"; e),
+            Error::EmptyBech32Payload => write!(f, "the bech32 payload was empty"),
+            Error::InvalidBech32Variant { expected, found } => write!(f, "invalid bech32 checksum variant found {:?} when {:?} was expected", found, expected),
+            Error::InvalidWitnessVersion(v) => write!(f, "invalid witness script version: {}", v),
+            Error::UnparsableWitnessVersion(ref e) => write_err!(f, "incorrect format of a witness version byte"; e),
+            Error::MalformedWitnessVersion => f.write_str("dash script opcode does not match any known witness version, the script is malformed"),
+            Error::InvalidWitnessProgramLength(l) => write!(f, "the witness program must be between 2 and 40 bytes in length: length={}", l),
+            Error::InvalidSegwitV0ProgramLength(l) => write!(f, "a v0 witness program must be either of length 20 or 32 bytes: length={}", l),
+            Error::UncompressedPubkey => write!(f, "an uncompressed pubkey was used where it is not allowed"),
+            Error::ExcessiveScriptSize => write!(f, "script size exceed 520 bytes"),
+            Error::UnrecognizedScript => write!(f, "script is not a p2pkh, p2sh or witness program"),
+            Error::UnknownAddressType(ref s) => write!(f, "unknown address type: '{}' is either invalid or not supported in rust-dash", s),
+            Error::NetworkValidation { required, found, ref address } => {
+                write!(f, "address ")?;
+                address.fmt_internal(f)?; // Using fmt_internal in order to remove the "Address<NetworkUnchecked>(..)" wrapper
+                write!(f, " belongs to network {} which is different from required {}", found, required)
+            }
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match self {
+            Base58(e) => Some(e),
+            Bech32(e) => Some(e),
+            UnparsableWitnessVersion(e) => Some(e),
+            EmptyBech32Payload
+            | InvalidBech32Variant { .. }
+            | InvalidWitnessVersion(_)
+            | MalformedWitnessVersion
+            | InvalidWitnessProgramLength(_)
+            | InvalidSegwitV0ProgramLength(_)
+            | UncompressedPubkey
+            | ExcessiveScriptSize
+            | UnrecognizedScript
+            | UnknownAddressType(_)
+            | NetworkValidation { .. } => None,
+        }
+    }
+}
+
+#[doc(hidden)]
+impl From<base58::Error> for Error {
+    fn from(e: base58::Error) -> Error { Error::Base58(e) }
+}
+
+#[doc(hidden)]
+impl From<bech32::Error> for Error {
+    fn from(e: bech32::Error) -> Error { Error::Bech32(e) }
+}
+
+/// The different types of addresses.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[non_exhaustive]
+pub enum AddressType {
+    /// Pay to pubkey hash.
+    P2pkh,
+    /// Pay to script hash.
+    P2sh,
+    /// Pay to witness pubkey hash.
+    P2wpkh,
+    /// Pay to witness script hash.
+    P2wsh,
+    /// Pay to taproot.
+    P2tr,
+}
+
+impl fmt::Display for AddressType {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.write_str(match *self {
+            AddressType::P2pkh => "p2pkh",
+            AddressType::P2sh => "p2sh",
+            AddressType::P2wpkh => "p2wpkh",
+            AddressType::P2wsh => "p2wsh",
+            AddressType::P2tr => "p2tr",
+        })
+    }
+}
+
+impl FromStr for AddressType {
+    type Err = Error;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "p2pkh" => Ok(AddressType::P2pkh),
+            "p2sh" => Ok(AddressType::P2sh),
+            "p2wpkh" => Ok(AddressType::P2wpkh),
+            "p2wsh" => Ok(AddressType::P2wsh),
+            "p2tr" => Ok(AddressType::P2tr),
+            _ => Err(Error::UnknownAddressType(s.to_owned())),
+        }
+    }
+}
+
+/// Version of the witness program.
+///
+/// Helps limit possible versions of the witness according to the specification. If a plain `u8`
+/// type was used instead it would mean that the version may be > 16, which would be incorrect.
+///
+/// First byte of `scriptPubkey` in transaction output for transactions starting with opcodes
+/// ranging from 0 to 16 (inclusive).
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+#[repr(u8)]
+pub enum WitnessVersion {
+    /// Initial version of witness program. Used for P2WPKH and P2WPK outputs
+    V0 = 0,
+    /// Version of witness program used for Taproot P2TR outputs.
+    V1 = 1,
+    /// Future (unsupported) version of witness program.
+    V2 = 2,
+    /// Future (unsupported) version of witness program.
+    V3 = 3,
+    /// Future (unsupported) version of witness program.
+    V4 = 4,
+    /// Future (unsupported) version of witness program.
+    V5 = 5,
+    /// Future (unsupported) version of witness program.
+    V6 = 6,
+    /// Future (unsupported) version of witness program.
+    V7 = 7,
+    /// Future (unsupported) version of witness program.
+    V8 = 8,
+    /// Future (unsupported) version of witness program.
+    V9 = 9,
+    /// Future (unsupported) version of witness program.
+    V10 = 10,
+    /// Future (unsupported) version of witness program.
+    V11 = 11,
+    /// Future (unsupported) version of witness program.
+    V12 = 12,
+    /// Future (unsupported) version of witness program.
+    V13 = 13,
+    /// Future (unsupported) version of witness program.
+    V14 = 14,
+    /// Future (unsupported) version of witness program.
+    V15 = 15,
+    /// Future (unsupported) version of witness program.
+    V16 = 16,
+}
+
+// /// Prints [`WitnessVersion`] number (from 0 to 16) as integer, without
+// /// any prefix or suffix.
+// impl fmt::Display for WitnessVersion {
+//     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { write!(f, "{}", *self as u8) }
+// }
+
+impl FromStr for WitnessVersion {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let version: u8 = crate::parse::int(s).map_err(Error::UnparsableWitnessVersion)?;
+        WitnessVersion::try_from(version)
+    }
+}
+
+impl WitnessVersion {
+    /// Returns integer version number representation for a given [`WitnessVersion`] value.
+    ///
+    /// NB: this is not the same as an integer representation of the opcode signifying witness
+    /// version in dashcore script. Thus, there is no function to directly convert witness version
+    /// into a byte since the conversion requires context (dashcore script or just a version number).
+    pub fn to_num(self) -> u8 { self as u8 }
+
+    /// Determines the checksum variant. See BIP-0350 for specification.
+    pub fn bech32_variant(&self) -> bech32::Variant {
+        match self {
+            WitnessVersion::V0 => bech32::Variant::Bech32,
+            _ => bech32::Variant::Bech32m,
+        }
+    }
+}
+
+impl TryFrom<bech32::u5> for WitnessVersion {
+    type Error = Error;
+
+    /// Converts 5-bit unsigned integer value matching single symbol from Bech32(m) address encoding
+    /// ([`bech32::u5`]) into [`WitnessVersion`] variant.
+    ///
+    /// # Returns
+    /// Version of the Witness program.
+    ///
+    /// # Errors
+    /// If the integer does not correspond to any witness version, errors with
+    /// [`Error::InvalidWitnessVersion`].
+    fn try_from(value: bech32::u5) -> Result<Self, Self::Error> { Self::try_from(value.to_u8()) }
+}
+
+impl TryFrom<u8> for WitnessVersion {
+    type Error = Error;
+
+    /// Converts an 8-bit unsigned integer value into [`WitnessVersion`] variant.
+    ///
+    /// # Returns
+    /// Version of the Witness program.
+    ///
+    /// # Errors
+    /// If the integer does not correspond to any witness version, errors with
+    /// [`Error::InvalidWitnessVersion`].
+    fn try_from(no: u8) -> Result<Self, Self::Error> {
+        use WitnessVersion::*;
+
+        Ok(match no {
+            0 => V0,
+            1 => V1,
+            2 => V2,
+            3 => V3,
+            4 => V4,
+            5 => V5,
+            6 => V6,
+            7 => V7,
+            8 => V8,
+            9 => V9,
+            10 => V10,
+            11 => V11,
+            12 => V12,
+            13 => V13,
+            14 => V14,
+            15 => V15,
+            16 => V16,
+            wrong => return Err(Error::InvalidWitnessVersion(wrong)),
+        })
+    }
+}
+
+impl TryFrom<opcodes::All> for WitnessVersion {
+    type Error = Error;
+
+    /// Converts dashcore script opcode into [`WitnessVersion`] variant.
+    ///
+    /// # Returns
+    /// Version of the Witness program (for opcodes in range of `OP_0`..`OP_16`).
+    ///
+    /// # Errors
+    /// If the opcode does not correspond to any witness version, errors with
+    /// [`Error::MalformedWitnessVersion`].
+    fn try_from(opcode: opcodes::All) -> Result<Self, Self::Error> {
+        match opcode.to_u8() {
+            0 => Ok(WitnessVersion::V0),
+            version if version >= OP_PUSHNUM_1.to_u8() && version <= OP_PUSHNUM_16.to_u8() =>
+                WitnessVersion::try_from(version - OP_PUSHNUM_1.to_u8() + 1),
+            _ => Err(Error::MalformedWitnessVersion),
+        }
+    }
+}
+
+impl<'a> TryFrom<Instruction<'a>> for WitnessVersion {
+    type Error = Error;
+
+    /// Converts dashcore script [`Instruction`] (parsed opcode) into [`WitnessVersion`] variant.
+    ///
+    /// # Returns
+    /// Version of the Witness program for [`Instruction::Op`] and [`Instruction::PushBytes`] with
+    /// byte value within `1..=16` range.
+    ///
+    /// # Errors
+    /// If the opcode does not correspond to any witness version, errors with
+    /// [`Error::MalformedWitnessVersion`] for the rest of opcodes.
+    fn try_from(instruction: Instruction) -> Result<Self, Self::Error> {
+        match instruction {
+            Instruction::Op(op) => WitnessVersion::try_from(op),
+            Instruction::PushBytes(bytes) if bytes.is_empty() => Ok(WitnessVersion::V0),
+            Instruction::PushBytes(_) => Err(Error::MalformedWitnessVersion),
+        }
+    }
+}
+
+impl From<WitnessVersion> for bech32::u5 {
+    /// Converts [`WitnessVersion`] instance into corresponding Bech32(m) u5-value ([`bech32::u5`]).
+    fn from(version: WitnessVersion) -> Self {
+        bech32::u5::try_from_u8(version.to_num()).expect("WitnessVersion must be 0..=16")
+    }
+}
+
+impl From<WitnessVersion> for opcodes::All {
+    /// Converts [`WitnessVersion`] instance into corresponding Dash scriptopcode (`OP_0`..`OP_16`).
+    fn from(version: WitnessVersion) -> opcodes::All {
+        match version {
+            WitnessVersion::V0 => OP_PUSHBYTES_0,
+            no => opcodes::All::from(OP_PUSHNUM_1.to_u8() + no.to_num() - 1),
+        }
+    }
+}
+
+/// Prints [`WitnessVersion`] number (from 0 to 16) as integer, without
+/// any prefix or suffix.
+impl fmt::Display for WitnessVersion {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { write!(f, "{}", *self as u8) }
+}
+
+/// The method used to produce an address.
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[non_exhaustive]
+pub enum Payload {
+    /// P2PKH address.
+    PubkeyHash(PubkeyHash),
+    /// P2SH address.
+    ScriptHash(ScriptHash),
+    /// Segwit address.
+    WitnessProgram(WitnessProgram),
+}
+
+/// Witness program as defined in BIP141.
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct WitnessProgram {
+    /// The witness program version.
+    version: WitnessVersion,
+    /// The witness program. (Between 2 and 40 bytes)
+    program: PushBytesBuf,
+}
+
+impl WitnessProgram {
+    /// Creates a new witness program.
+    pub fn new<P>(version: WitnessVersion, program: P) -> Result<Self, Error>
+        where
+            P: TryInto<PushBytesBuf>,
+            <P as TryInto<PushBytesBuf>>::Error: PushBytesErrorReport,
+    {
+        let program = program
+            .try_into()
+            .map_err(|error| Error::InvalidWitnessProgramLength(error.input_len()))?;
+        if program.len() < 2 || program.len() > 40 {
+            return Err(Error::InvalidWitnessProgramLength(program.len()));
+        }
+
+        // Specific segwit v0 check. These addresses can never spend funds sent to them.
+        if version == WitnessVersion::V0 && (program.len() != 20 && program.len() != 32) {
+            return Err(Error::InvalidSegwitV0ProgramLength(program.len()));
+        }
+        Ok(WitnessProgram { version, program })
+    }
+
+    /// Returns the witness program version.
+    pub fn version(&self) -> WitnessVersion { self.version }
+
+    /// Returns the witness program.
+    pub fn program(&self) -> &PushBytes { &self.program }
+}
+
+impl Payload {
+    /// Constructs a [Payload] from an output script (`scriptPubkey`).
+    pub fn from_script(script: &Script) -> Result<Payload, Error> {
+        Ok(if script.is_p2pkh() {
+            let bytes = script.as_bytes()[3..23].try_into().expect("statically 20B long");
+            Payload::PubkeyHash(PubkeyHash::from_byte_array(bytes))
+        } else if script.is_p2sh() {
+            let bytes = script.as_bytes()[2..22].try_into().expect("statically 20B long");
+            Payload::ScriptHash(ScriptHash::from_byte_array(bytes))
+        } else if script.is_witness_program() {
+            let opcode = script.first_opcode().expect("witness_version guarantees len() > 4");
+
+            let witness_program = script.as_bytes()[2..].to_vec();
+
+            let witness_program =
+                WitnessProgram::new(WitnessVersion::try_from(opcode)?, witness_program)?;
+            Payload::WitnessProgram(witness_program)
+        } else {
+            return Err(Error::UnrecognizedScript);
+        })
+    }
+
+    /// Generates a script pubkey spending to this [Payload].
+    pub fn script_pubkey(&self) -> ScriptBuf {
+        match *self {
+            Payload::PubkeyHash(ref hash) => ScriptBuf::new_p2pkh(hash),
+            Payload::ScriptHash(ref hash) => ScriptBuf::new_p2sh(hash),
+            Payload::WitnessProgram(ref prog) => ScriptBuf::new_witness_program(prog),
+        }
+    }
+
+    /// Returns true if the address creates a particular script
+    /// This function doesn't make any allocations.
+    pub fn matches_script_pubkey(&self, script: &Script) -> bool {
+        match *self {
+            Payload::PubkeyHash(ref hash) if script.is_p2pkh() =>
+                &script.as_bytes()[3..23] == <PubkeyHash as AsRef<[u8; 20]>>::as_ref(hash),
+            Payload::ScriptHash(ref hash) if script.is_p2sh() =>
+                &script.as_bytes()[2..22] == <ScriptHash as AsRef<[u8; 20]>>::as_ref(hash),
+            Payload::WitnessProgram(ref prog) if script.is_witness_program() =>
+                &script.as_bytes()[2..] == prog.program.as_bytes(),
+            Payload::PubkeyHash(_) | Payload::ScriptHash(_) | Payload::WitnessProgram(_) => false,
+        }
+    }
+
+    /// Creates a pay to (compressed) public key hash payload from a public key
+    #[inline]
+    pub fn p2pkh(pk: &PublicKey) -> Payload { Payload::PubkeyHash(pk.pubkey_hash()) }
+
+    /// Creates a pay to script hash P2SH payload from a script
+    #[inline]
+    pub fn p2sh(script: &Script) -> Result<Payload, Error> {
+        if script.len() > MAX_SCRIPT_ELEMENT_SIZE {
+            return Err(Error::ExcessiveScriptSize);
+        }
+        Ok(Payload::ScriptHash(script.script_hash()))
+    }
+
+    /// Create a witness pay to public key payload from a public key
+    pub fn p2wpkh(pk: &PublicKey) -> Result<Payload, Error> {
+        let prog = WitnessProgram::new(
+            WitnessVersion::V0,
+            pk.wpubkey_hash().ok_or(Error::UncompressedPubkey)?,
+        )?;
+        Ok(Payload::WitnessProgram(prog))
+    }
+
+    /// Create a pay to script payload that embeds a witness pay to public key
+    pub fn p2shwpkh(pk: &PublicKey) -> Result<Payload, Error> {
+        let builder = script::Builder::new()
+            .push_int(0)
+            .push_slice(pk.wpubkey_hash().ok_or(Error::UncompressedPubkey)?);
+
+        Ok(Payload::ScriptHash(builder.into_script().script_hash()))
+    }
+
+    /// Create a witness pay to script hash payload.
+    pub fn p2wsh(script: &Script) -> Payload {
+        let prog = WitnessProgram::new(WitnessVersion::V0, script.wscript_hash())
+            .expect("wscript_hash has len 32 compatible with segwitv0");
+        Payload::WitnessProgram(prog)
+    }
+
+    /// Create a pay to script payload that embeds a witness pay to script hash address
+    pub fn p2shwsh(script: &Script) -> Payload {
+        let ws = script::Builder::new().push_int(0).push_slice(script.wscript_hash()).into_script();
+
+        Payload::ScriptHash(ws.script_hash())
+    }
+
+    /// Create a pay to taproot payload from untweaked key
+    pub fn p2tr<C: Verification>(
+        secp: &Secp256k1<C>,
+        internal_key: UntweakedPublicKey,
+        merkle_root: Option<TapNodeHash>,
+    ) -> Payload {
+        let (output_key, _parity) = internal_key.tap_tweak(secp, merkle_root);
+        let prog = WitnessProgram::new(WitnessVersion::V1, output_key.to_inner().serialize())
+            .expect("taproot output key has len 32 <= 40");
+        Payload::WitnessProgram(prog)
+    }
+
+    /// Create a pay to taproot payload from a pre-tweaked output key.
+    ///
+    /// This method is not recommended for use and [Payload::p2tr()] should be used where possible.
+    pub fn p2tr_tweaked(output_key: TweakedPublicKey) -> Payload {
+        let prog = WitnessProgram::new(WitnessVersion::V1, output_key.to_inner().serialize())
+            .expect("taproot output key has len 32 <= 40");
+        Payload::WitnessProgram(prog)
+    }
+
+    /// Returns a byte slice of the inner program of the payload. If the payload
+    /// is a script hash or pubkey hash, a reference to the hash is returned.
+    fn inner_prog_as_bytes(&self) -> &[u8] {
+        match self {
+            Payload::ScriptHash(hash) => hash.as_ref(),
+            Payload::PubkeyHash(hash) => hash.as_ref(),
+            Payload::WitnessProgram(prog) => prog.program().as_bytes(),
+        }
+    }
+}
+
+/// A utility struct to encode an address payload with the given parameters.
+/// This is a low-level utility struct. Consider using `Address` instead.
+pub struct AddressEncoding<'a> {
+    /// The address payload to encode.
+    pub payload: &'a Payload,
+    /// base58 version byte for p2pkh payloads (e.g. 0x00 for "1..." addresses).
+    pub p2pkh_prefix: u8,
+    /// base58 version byte for p2sh payloads (e.g. 0x05 for "3..." addresses).
+    pub p2sh_prefix: u8,
+    /// hrp used in bech32 addresss (e.g. "bc" for "bc1..." addresses).
+    pub bech32_hrp: &'a str,
+}
+
+/// Formats bech32 as upper case if alternate formatting is chosen (`{:#}`).
+impl<'a> fmt::Display for AddressEncoding<'a> {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        match self.payload {
+            Payload::PubkeyHash(hash) => {
+                let mut prefixed = [0; 21];
+                prefixed[0] = self.p2pkh_prefix;
+                prefixed[1..].copy_from_slice(&hash[..]);
+                base58::encode_check_to_fmt(fmt, &prefixed[..])
+            }
+            Payload::ScriptHash(hash) => {
+                let mut prefixed = [0; 21];
+                prefixed[0] = self.p2sh_prefix;
+                prefixed[1..].copy_from_slice(&hash[..]);
+                base58::encode_check_to_fmt(fmt, &prefixed[..])
+            }
+            Payload::WitnessProgram(witness_prog) => {
+                let (version, prog) = (witness_prog.version(), witness_prog.program());
+                let mut upper_writer;
+                let writer = if fmt.alternate() {
+                    upper_writer = UpperWriter(fmt);
+                    &mut upper_writer as &mut dyn fmt::Write
+                } else {
+                    fmt as &mut dyn fmt::Write
+                };
+                let mut bech32_writer =
+                    bech32::Bech32Writer::new(self.bech32_hrp, version.bech32_variant(), writer)?;
+                bech32::WriteBase32::write_u5(&mut bech32_writer, version.into())?;
+                bech32::ToBase32::write_base32(&prog.as_bytes(), &mut bech32_writer)
+            }
+        }
+    }
+}
+
+mod sealed {
+    pub trait NetworkValidation {}
+    impl NetworkValidation for super::NetworkChecked {}
+    impl NetworkValidation for super::NetworkUnchecked {}
+}
+
+/// Marker of status of address's network validation. See section [*Parsing addresses*](Address#parsing-addresses)
+/// on [`Address`] for details.
+pub trait NetworkValidation: sealed::NetworkValidation {
+    /// Indicates whether this `NetworkValidation` is `NetworkChecked` or not.
+    const IS_CHECKED: bool;
+}
+
+/// Marker that address's network has been successfully validated. See section [*Parsing addresses*](Address#parsing-addresses)
+/// on [`Address`] for details.
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum NetworkChecked {}
+
+/// Marker that address's network has not yet been validated. See section [*Parsing addresses*](Address#parsing-addresses)
+/// on [`Address`] for details.
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum NetworkUnchecked {}
+
+impl NetworkValidation for NetworkChecked {
+    const IS_CHECKED: bool = true;
+}
+impl NetworkValidation for NetworkUnchecked {
+    const IS_CHECKED: bool = false;
+}
+
+/// The inner representation of an address, without the network validation tag.
+///
+/// An `Address` is composed of a payload and a network. This struct represents the inner
+/// representation of an address without the network validation tag, which is used to ensure that
+/// addresses are used only on the appropriate network.
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+struct AddressInner {
+    payload: Payload,
+    network: Network,
+}
+
+/// A Dash address.
+///
+/// ### Parsing addresses
+///
+/// When parsing string as an address, one has to pay attention to the network, on which the parsed
+/// address is supposed to be valid. For the purpose of this validation, `Address` has
+/// [`is_valid_for_network`](Address<NetworkUnchecked>::is_valid_for_network) method. In order to provide more safety,
+/// enforced by compiler, `Address` also contains a special marker type, which indicates whether network of the parsed
+/// address has been checked. This marker type will prevent from calling certain functions unless the network
+/// verification has been successfully completed.
+///
+/// The result of parsing an address is `Address<NetworkUnchecked>` suggesting that network of the parsed address
+/// has not yet been verified. To perform this verification, method [`require_network`](Address<NetworkUnchecked>::require_network)
+/// can be called, providing network on which the address is supposed to be valid. If the verification succeeds,
+/// `Address<NetworkChecked>` is returned.
+///
+/// The types `Address` and `Address<NetworkChecked>` are synonymous, i. e. they can be used interchangeably.
+///
+/// ```rust
+/// use std::str::FromStr;
+/// use dashcore::{Address, Network};
+/// use dashcore::address::{NetworkUnchecked, NetworkChecked};
+///
+/// // variant 1
+/// let address: Address<NetworkUnchecked> = "XxMZ412shTuxDKUBdNfxMeLr4KhtfJjRv5".parse().unwrap();
+/// let address: Address<NetworkChecked> = address.require_network(Network::Dash).unwrap();
+///
+/// // variant 2
+/// let address: Address = Address::from_str("XxMZ412shTuxDKUBdNfxMeLr4KhtfJjRv5").unwrap()
+///                .require_network(Network::Dash).unwrap();
+///
+/// // variant 3
+/// let address: Address<NetworkChecked> = "XxMZ412shTuxDKUBdNfxMeLr4KhtfJjRv5".parse::<Address<_>>()
+///                .unwrap().require_network(Network::Dash).unwrap();
+/// ```
+///
+/// ### Formatting addresses
+///
+/// To format address into its textual representation, both `Debug` (for usage in programmer-facing,
+/// debugging context) and `Display` (for user-facing output) can be used, with the following caveats:
+///
+/// 1. `Display` is implemented only for `Address<NetworkChecked>`:
+///
+/// ```
+/// # use std::str::FromStr;
+/// # use dashcore::address::{Address, NetworkChecked};
+/// let address: Address<NetworkChecked> = Address::from_str("XbPsX3CJbEaeNUXMpn29CNbQhTy6q6hf4A")
+///                .unwrap().assume_checked();
+/// assert_eq!(address.to_string(), "XbPsX3CJbEaeNUXMpn29CNbQhTy6q6hf4A");
+/// ```
+///
+/// ```ignore
+/// # use std::str::FromStr;
+/// # use dashcore::address::{Address, NetworkChecked};
+/// use dashcore::Address;
+/// use dashcore::address::NetworkUnchecked;
+/// let address: Address<NetworkUnchecked> = Address::from_str("XbPsX3CJbEaeNUXMpn29CNbQhTy6q6hf4A")
+///                .unwrap();
+/// let s = address.to_string(); // does not compile
+/// ```
+///
+/// 2. `Debug` on `Address<NetworkUnchecked>` does not produce clean address but address wrapped by
+/// an indicator that its network has not been checked. This is to encourage programmer to properly
+/// check the network and use `Display` in user-facing context.
+///
+/// ```
+/// # use std::str::FromStr;
+/// # use dashcore::address::{Address, NetworkUnchecked};
+/// let address: Address<NetworkUnchecked> = Address::from_str("XbPsX3CJbEaeNUXMpn29CNbQhTy6q6hf4A")
+///                .unwrap();
+/// assert_eq!(format!("{:?}", address), "Address<NetworkUnchecked>(XbPsX3CJbEaeNUXMpn29CNbQhTy6q6hf4A)");
+/// ```
+///
+/// ```
+/// # use std::str::FromStr;
+/// # use dashcore::address::{Address, NetworkChecked};
+/// let address: Address<NetworkChecked> = Address::from_str("XbPsX3CJbEaeNUXMpn29CNbQhTy6q6hf4A")
+///                .unwrap().assume_checked();
+/// assert_eq!(format!("{:?}", address), "XbPsX3CJbEaeNUXMpn29CNbQhTy6q6hf4A");
+/// ```
+///
+/// ### Relevant BIPs
+///
+/// * [BIP13 - Address Format for pay-to-script-hash](https://github.com/bitcoin/bips/blob/master/bip-0013.mediawiki)
+/// * [BIP16 - Pay to Script Hash](https://github.com/bitcoin/bips/blob/master/bip-0016.mediawiki)
+/// * [BIP141 - Segregated Witness (Consensus layer)](https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki)
+/// * [BIP142 - Address Format for Segregated Witness](https://github.com/bitcoin/bips/blob/master/bip-0142.mediawiki)
+/// * [BIP341 - Taproot: SegWit version 1 spending rules](https://github.com/bitcoin/bips/blob/master/bip-0341.mediawiki)
+/// * [BIP350 - Bech32m format for v1+ witness addresses](https://github.com/bitcoin/bips/blob/master/bip-0350.mediawiki)
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+///
+/// The `#[repr(transparent)]` attribute is used to guarantee that the layout of the
+/// `Address` struct is the same as the layout of the `AddressInner` struct. This attribute is
+/// an implementation detail and users should not rely on it in their code.
+///
+#[repr(transparent)]
+pub struct Address<V = NetworkChecked>(AddressInner, PhantomData<V>)
+    where
+        V: NetworkValidation;
+
+#[cfg(feature = "serde")]
+struct DisplayUnchecked<'a>(&'a Address<NetworkUnchecked>);
+
+#[cfg(feature = "serde")]
+impl fmt::Display for DisplayUnchecked<'_> {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { self.0.fmt_internal(fmt) }
+}
+
+#[cfg(feature = "serde")]
+crate::serde_utils::serde_string_serialize_impl!(Address, "a Dash address");
+
+#[cfg(feature = "serde")]
+crate::serde_utils::serde_string_deserialize_impl!(Address<NetworkUnchecked>, "a Dash address");
+
+#[cfg(feature = "serde")]
+impl serde::Serialize for Address<NetworkUnchecked> {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+        where
+            S: serde::Serializer,
+    {
+        serializer.collect_str(&DisplayUnchecked(self))
+    }
+}
+
+/// Methods on [`Address`] that can be called on both `Address<NetworkChecked>` and
+/// `Address<NetworkUnchecked>`.
+impl<V: NetworkValidation> Address<V> {
+    /// Returns a reference to the payload of this address.
+    pub fn payload(&self) -> &Payload { &self.0.payload }
+
+    /// Returns a reference to the network of this address.
+    pub fn network(&self) -> &Network { &self.0.network }
+
+    /// Returns a reference to the unchecked address, which is dangerous to use if the address
+    /// is invalid in the context of `NetworkUnchecked`.
+    pub fn as_unchecked(&self) -> &Address<NetworkUnchecked> {
+        unsafe { &*(self as *const Address<V> as *const Address<NetworkUnchecked>) }
+    }
+
+    /// Extracts and returns the network and payload components of the `Address`.
+    pub fn into_parts(self) -> (Network, Payload) {
+        let AddressInner { payload, network } = self.0;
+        (network, payload)
+    }
+
+    /// Gets the address type of the address.
+    ///
+    /// This method is publicly available as [`address_type`](Address<NetworkChecked>::address_type)
+    /// on `Address<NetworkChecked>` but internally can be called on `Address<NetworkUnchecked>` as
+    /// `address_type_internal`.
+    ///
+    /// # Returns
+    /// None if unknown, non-standard or related to the future witness version.
+    fn address_type_internal(&self) -> Option<AddressType> {
+        match self.payload() {
+            Payload::PubkeyHash(_) => Some(AddressType::P2pkh),
+            Payload::ScriptHash(_) => Some(AddressType::P2sh),
+            Payload::WitnessProgram(ref prog) => {
+                // BIP-141 p2wpkh or p2wsh addresses.
+                match prog.version() {
+                    WitnessVersion::V0 => match prog.program().len() {
+                        20 => Some(AddressType::P2wpkh),
+                        32 => Some(AddressType::P2wsh),
+                        _ => unreachable!(
+                            "Address creation invariant violation: invalid program length"
+                        ),
+                    },
+                    WitnessVersion::V1 if prog.program().len() == 32 => Some(AddressType::P2tr),
+                    _ => None,
+                }
+            }
+        }
+    }
+
+    /// Format the address for the usage by `Debug` and `Display` implementations.
+    fn fmt_internal(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        let p2pkh_prefix = match self.network() {
+            Network::Dash => PUBKEY_ADDRESS_PREFIX_MAIN,
+            Network::Testnet | Network::Devnet | Network::Regtest => PUBKEY_ADDRESS_PREFIX_TEST,
+        };
+        let p2sh_prefix = match self.network() {
+            Network::Dash => SCRIPT_ADDRESS_PREFIX_MAIN,
+            Network::Testnet | Network::Devnet | Network::Regtest => SCRIPT_ADDRESS_PREFIX_TEST,
+        };
+        let bech32_hrp = match self.network() {
+            Network::Dash => "ds",
+            Network::Testnet | Network::Devnet => "tb",
+            Network::Regtest => "dsrt",
+        };
+        let encoding =
+            AddressEncoding { payload: self.payload(), p2pkh_prefix, p2sh_prefix, bech32_hrp };
+
+        use fmt::Display;
+
+        encoding.fmt(fmt)
+    }
+
+    /// Create new address from given components, infering the network validation
+    /// marker type of the address.
+    #[inline]
+    pub fn new(network: Network, payload: Payload) -> Self {
+        Self(AddressInner { network, payload }, PhantomData)
+    }
+}
+
+/// Methods and functions that can be called only on `Address<NetworkChecked>`.
+impl Address {
+    /// Creates a pay to (compressed) public key hash address from a public key.
+    ///
+    /// This is the preferred non-witness type address.
+    #[inline]
+    pub fn p2pkh(pk: &PublicKey, network: Network) -> Address {
+        Address::new(network, Payload::p2pkh(pk))
+    }
+
+    /// Creates a pay to script hash P2SH address from a script.
+    ///
+    /// This address type was introduced with BIP16 and is the popular type to implement multi-sig
+    /// these days.
+    #[inline]
+    pub fn p2sh(script: &Script, network: Network) -> Result<Address, Error> {
+        Ok(Address::new(network, Payload::p2sh(script)?))
+    }
+
+    /// Creates a witness pay to public key address from a public key.
+    ///
+    /// This is the native segwit address type for an output redeemable with a single signature.
+    ///
+    /// # Errors
+    /// Will only return an error if an uncompressed public key is provided.
+    pub fn p2wpkh(pk: &PublicKey, network: Network) -> Result<Address, Error> {
+        Ok(Address::new(network, Payload::p2wpkh(pk)?))
+    }
+
+    /// Creates a pay to script address that embeds a witness pay to public key.
+    ///
+    /// This is a segwit address type that looks familiar (as p2sh) to legacy clients.
+    ///
+    /// # Errors
+    /// Will only return an Error if an uncompressed public key is provided.
+    pub fn p2shwpkh(pk: &PublicKey, network: Network) -> Result<Address, Error> {
+        Ok(Address::new(network, Payload::p2shwpkh(pk)?))
+    }
+
+    /// Creates a witness pay to script hash address.
+    pub fn p2wsh(script: &Script, network: Network) -> Address {
+        Address::new(network, Payload::p2wsh(script))
+    }
+
+    /// Creates a pay to script address that embeds a witness pay to script hash address.
+    ///
+    /// This is a segwit address type that looks familiar (as p2sh) to legacy clients.
+    pub fn p2shwsh(script: &Script, network: Network) -> Address {
+        Address::new(network, Payload::p2shwsh(script))
+    }
+
+    /// Creates a pay to taproot address from an untweaked key.
+    pub fn p2tr<C: Verification>(
+        secp: &Secp256k1<C>,
+        internal_key: UntweakedPublicKey,
+        merkle_root: Option<TapNodeHash>,
+        network: Network,
+    ) -> Address {
+        Address::new(network, Payload::p2tr(secp, internal_key, merkle_root))
+    }
+
+    /// Creates a pay to taproot address from a pre-tweaked output key.
+    ///
+    /// This method is not recommended for use, [`Address::p2tr()`] should be used where possible.
+    pub fn p2tr_tweaked(output_key: TweakedPublicKey, network: Network) -> Address {
+        Address::new(network, Payload::p2tr_tweaked(output_key))
+    }
+
+    /// Gets the address type of the address.
+    ///
+    /// # Returns
+    /// None if unknown, non-standard or related to the future witness version.
+    #[inline]
+    pub fn address_type(&self) -> Option<AddressType> { self.address_type_internal() }
+
+    /// Checks whether or not the address is following Dash standardness rules when
+    /// *spending* from this address. *NOT* to be called by senders.
+    ///
+    /// <details>
+    /// <summary>Spending Standardness</summary>
+    ///
+    /// For forward compatibility, the senders must send to any [`Address`]. Receivers
+    /// can use this method to check whether or not they can spend from this address.
+    ///
+    /// SegWit addresses with unassigned witness versions or non-standard program sizes are
+    /// considered non-standard.
+    /// </details>
+    ///
+    pub fn is_spend_standard(&self) -> bool { self.address_type().is_some() }
+
+    /// Checks whether or not the address is following Dash standardness rules.
+    ///
+    /// SegWit addresses with unassigned witness versions or non-standard program sizes are
+    /// considered non-standard.
+    #[deprecated(since = "0.30.0", note = "Use Address::is_spend_standard instead")]
+    pub fn is_standard(&self) -> bool { self.address_type().is_some() }
+
+    /// Constructs an [`Address`] from an output script (`scriptPubkey`).
+    pub fn from_script(script: &ScriptBuf, network: Network) -> Result<Address, Error> {
+        Ok(Address::new(network, Payload::from_script(script)?))
+    }
+
+    /// Generates a script pubkey spending to this address.
+    pub fn script_pubkey(&self) -> ScriptBuf { self.payload().script_pubkey() }
+
+    /// Creates a URI string *dashcore:address* optimized to be encoded in QR codes.
+    ///
+    /// If the address is bech32, both the schema and the address become uppercase.
+    /// If the address is base58, the schema is lowercase and the address is left mixed case.
+    ///
+    /// Quoting BIP 173 "inside QR codes uppercase SHOULD be used, as those permit the use of
+    /// alphanumeric mode, which is 45% more compact than the normal byte mode."
+    ///
+    /// Note however that despite BIP21 explicitly stating that the `dashcore:` prefix should be
+    /// parsed as case-insensitive many wallets got this wrong and don't parse correctly.
+    /// [See compatibility table.](https://github.com/btcpayserver/btcpayserver/issues/2110)
+    ///
+    /// If you want to avoid allocation you can use alternate display instead:
+    /// ```
+    /// # use core::fmt::Write;
+    /// # const ADDRESS: &str = "Xxb77sLZJZMUeYdf3TpWNoRFgEvjQkoi2q";
+    /// # let address = ADDRESS.parse::<dashcore::Address<_>>().unwrap().assume_checked();
+    /// # let mut writer = String::new();
+    /// # // magic trick to make error handling look better
+    /// # (|| -> Result<(), core::fmt::Error> {
+    ///
+    /// write!(writer, "{:#}", address)?;
+    ///
+    /// # Ok(())
+    /// # })().unwrap();
+    /// # assert_eq!(writer, ADDRESS);
+    /// ```
+    pub fn to_qr_uri(&self) -> String {
+        let schema = match self.payload() {
+            Payload::WitnessProgram { .. } => "DASH",
+            _ => "dash",
+        };
+        format!("{}:{:#}", schema, self)
+    }
+
+    /// Returns true if the given pubkey is directly related to the address payload.
+    ///
+    /// This is determined by directly comparing the address payload with either the
+    /// hash of the given public key or the segwit redeem hash generated from the
+    /// given key. For taproot addresses, the supplied key is assumed to be tweaked
+    pub fn is_related_to_pubkey(&self, pubkey: &PublicKey) -> bool {
+        let pubkey_hash = pubkey.pubkey_hash();
+        let payload = self.payload().inner_prog_as_bytes();
+        let xonly_pubkey = XOnlyPublicKey::from(pubkey.inner);
+
+        (*pubkey_hash.as_byte_array() == *payload)
+            || (xonly_pubkey.serialize() == *payload)
+            || (*segwit_redeem_hash(&pubkey_hash).as_byte_array() == *payload)
+    }
+
+    /// Returns true if the supplied xonly public key can be used to derive the address.
+    ///
+    /// This will only work for Taproot addresses. The Public Key is
+    /// assumed to have already been tweaked.
+    pub fn is_related_to_xonly_pubkey(&self, xonly_pubkey: &XOnlyPublicKey) -> bool {
+        let payload = self.payload().inner_prog_as_bytes();
+        payload == xonly_pubkey.serialize()
+    }
+
+    /// Returns true if the address creates a particular script
+    /// This function doesn't make any allocations.
+    pub fn matches_script_pubkey(&self, script_pubkey: &Script) -> bool {
+        self.payload().matches_script_pubkey(script_pubkey)
+    }
+}
+
+/// Methods that can be called only on `Address<NetworkUnchecked>`.
+impl Address<NetworkUnchecked> {
+    /// Returns a reference to the checked address.
+    /// This function is dangerous in case the address is not a valid checked address.
+    pub fn assume_checked_ref(&self) -> &Address {
+        unsafe { &*(self as *const Address<NetworkUnchecked> as *const Address) }
+    }
+    /// Parsed addresses do not always have *one* network. The problem is that legacy testnet,
+    /// regtest and devnet addresse use the same prefix instead of multiple different ones. When
+    /// parsing, such addresses are always assumed to be testnet addresses (the same is true for
+    /// bech32 devnet addresses). So if one wants to check if an address belongs to a certain
+    /// network a simple comparison is not enough anymore. Instead this function can be used.
+    ///
+    /// ```rust
+    /// use dashcore::{Address, Network};
+    /// use dashcore::address::NetworkUnchecked;
+    ///
+    /// let address: Address<NetworkUnchecked> = "yiLAa2hfeevAiiDn2wf4rXCPC9Frf3TQcE".parse().unwrap();
+    /// assert!(address.is_valid_for_network(Network::Testnet));
+    /// assert!(address.is_valid_for_network(Network::Regtest));
+    /// assert!(address.is_valid_for_network(Network::Devnet));
+    ///
+    /// assert_eq!(address.is_valid_for_network(Network::Dash), false);
+    ///
+    /// let address: Address<NetworkUnchecked> = "Xs6U2uPMzn4zyfTtEkDgXMFGm39RP1F7mv".parse().unwrap();
+    /// assert!(address.is_valid_for_network(Network::Dash));
+    /// assert_eq!(address.is_valid_for_network(Network::Testnet), false);
+    /// ```
+    pub fn is_valid_for_network(&self, network: Network) -> bool {
+        let is_legacy = matches!(
+            self.address_type_internal(),
+            Some(AddressType::P2pkh) | Some(AddressType::P2sh)
+        );
+
+        match (self.network(), network) {
+            (a, b) if *a == b => true,
+            (Network::Dash, _) | (_, Network::Dash) => false,
+            (Network::Regtest, _) | (_, Network::Regtest) if !is_legacy => false,
+            (Network::Testnet, _) | (Network::Regtest, _) | (Network::Devnet, _) => true,
+        }
+    }
+
+    /// Checks whether network of this address is as required.
+    ///
+    /// For details about this mechanism, see section [*Parsing addresses*](Address#parsing-addresses)
+    /// on [`Address`].
+    #[inline]
+    pub fn require_network(self, required: Network) -> Result<Address, Error> {
+        if self.is_valid_for_network(required) {
+            Ok(self.assume_checked())
+        } else {
+            Err(Error::NetworkValidation { found: *self.network(), required, address: self })
+        }
+    }
+
+    /// Marks, without any additional checks, network of this address as checked.
+    ///
+    /// Improper use of this method may lead to loss of funds. Reader will most likely prefer
+    /// [`require_network`](Address<NetworkUnchecked>::require_network) as a safe variant.
+    /// For details about this mechanism, see section [*Parsing addresses*](Address#parsing-addresses)
+    /// on [`Address`].
+    #[inline]
+    pub fn assume_checked(self) -> Address {
+        let (network, payload) = self.into_parts();
+        Address::new(network, payload)
+    }
+
+    /// Returns the payload as a vector.
+    pub fn payload_to_vec(&self) -> Vec<u8> {
+        self.0.payload.inner_prog_as_bytes().to_vec()
+    }
+}
+
+// For NetworkUnchecked , it compare Addresses and if network and payload matches then return true.
+impl PartialEq<Address<NetworkUnchecked>> for Address {
+    fn eq(&self, other: &Address<NetworkUnchecked>) -> bool {
+        self.network() == other.network() && self.payload() == other.payload()
+    }
+}
+
+impl PartialEq<Address> for Address<NetworkUnchecked> {
+    fn eq(&self, other: &Address) -> bool { other == self }
+}
+
+impl From<Address> for script::ScriptBuf {
+    fn from(a: Address) -> Self { a.script_pubkey() }
+}
+
+// Alternate formatting `{:#}` is used to return uppercase version of bech32 addresses which should
+// be used in QR codes, see [`Address::to_qr_uri`].
+impl fmt::Display for Address {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { self.fmt_internal(fmt) }
+}
+
+impl<V: NetworkValidation> fmt::Debug for Address<V> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        if V::IS_CHECKED {
+            self.fmt_internal(f)
+        } else {
+            write!(f, "Address<NetworkUnchecked>(")?;
+            self.fmt_internal(f)?;
+            write!(f, ")")
+        }
+    }
+}
+
+/// Address can be parsed only with `NetworkUnchecked`.
+impl FromStr for Address<NetworkUnchecked> {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Address<NetworkUnchecked>, Error> {
+        // try bech32
+        let bech32_network = match find_bech32_prefix(s) {
+            // note that upper or lowercase is allowed but NOT mixed case
+            "ds" | "DS" => Some(Network::Dash),
+            "td" | "TD" => Some(Network::Testnet), // this may also be a devnet
+            "dsrt" | "DSRT" => Some(Network::Regtest),
+            _ => None,
+        };
+        if let Some(network) = bech32_network {
+            // decode as bech32
+            let (_, payload, variant) = bech32::decode(s)?;
+            if payload.is_empty() {
+                return Err(Error::EmptyBech32Payload);
+            }
+
+            // Get the script version and program (converted from 5-bit to 8-bit)
+            let (version, program): (WitnessVersion, Vec<u8>) = {
+                let (v, p5) = payload.split_at(1);
+                (WitnessVersion::try_from(v[0])?, bech32::FromBase32::from_base32(p5)?)
+            };
+
+            let witness_program = WitnessProgram::new(version, program)?;
+
+            // Encoding check
+            let expected = version.bech32_variant();
+            if expected != variant {
+                return Err(Error::InvalidBech32Variant { expected, found: variant });
+            }
+
+            return Ok(Address::new(network, Payload::WitnessProgram(witness_program)));
+        }
+
+        // Base58
+        if s.len() > 50 {
+            return Err(Error::Base58(base58::Error::InvalidLength(s.len() * 11 / 15)));
+        }
+        let data = base58::decode_check(s)?;
+        if data.len() != 21 {
+            return Err(Error::Base58(base58::Error::InvalidLength(data.len())));
+        }
+
+        let (network, payload) = match data[0] {
+            PUBKEY_ADDRESS_PREFIX_MAIN =>
+                (Network::Dash, Payload::PubkeyHash(PubkeyHash::from_slice(&data[1..]).unwrap())),
+            SCRIPT_ADDRESS_PREFIX_MAIN =>
+                (Network::Dash, Payload::ScriptHash(ScriptHash::from_slice(&data[1..]).unwrap())),
+            PUBKEY_ADDRESS_PREFIX_TEST =>
+                (Network::Testnet, Payload::PubkeyHash(PubkeyHash::from_slice(&data[1..]).unwrap())),
+            SCRIPT_ADDRESS_PREFIX_TEST =>
+                (Network::Testnet, Payload::ScriptHash(ScriptHash::from_slice(&data[1..]).unwrap())),
+            x => return Err(Error::Base58(base58::Error::InvalidAddressVersion(x))),
+        };
+
+        Ok(Address::new(network, payload))
+    }
+}
+
+// // Alternate formatting `{:#}` is used to return uppercase version of bech32 addresses which should
+// // be used in QR codes, see [`Address::to_qr_uri`].
+// impl fmt::Display for Address {
+//     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+//         let p2pkh_prefix = match self.network {
+//             Network::Dash => PUBKEY_ADDRESS_PREFIX_MAIN,
+//             Network::Testnet | Network::Devnet | Network::Regtest => PUBKEY_ADDRESS_PREFIX_TEST,
+//         };
+//         let p2sh_prefix = match self.network {
+//             Network::Dash => SCRIPT_ADDRESS_PREFIX_MAIN,
+//             Network::Testnet | Network::Devnet | Network::Regtest => SCRIPT_ADDRESS_PREFIX_TEST,
+//         };
+//         let bech32_hrp = match self.network {
+//             Network::Dash => "ds",
+//             Network::Testnet | Network::Devnet => "td",
+//             Network::Regtest => "dsrt",
+//         };
+//         let encoding = AddressEncoding {
+//             payload: &self.payload,
+//             p2pkh_prefix,
+//             p2sh_prefix,
+//             bech32_hrp,
+//         };
+//         encoding.fmt(fmt)
+//     }
+// }
+
+struct UpperWriter<W: fmt::Write>(W);
+
+impl<W: fmt::Write> fmt::Write for UpperWriter<W> {
+    fn write_str(&mut self, s: &str) -> fmt::Result {
+        for c in s.chars() {
+            self.0.write_char(c.to_ascii_uppercase())?;
+        }
+        Ok(())
+    }
+}
+
+/// Extracts the bech32 prefix.
+///
+/// # Returns
+/// The input slice if no prefix is found.
+fn find_bech32_prefix(bech32: &str) -> &str {
+    // Split at the last occurrence of the separator character '1'.
+    match bech32.rfind('1') {
+        None => bech32,
+        Some(sep) => bech32.split_at(sep).0,
+    }
+}
+
+/// Convert a byte array of a pubkey hash into a segwit redeem hash
+fn segwit_redeem_hash(pubkey_hash: &PubkeyHash) -> crate::hashes::hash160::Hash {
+    let mut sha_engine = sha256::Hash::engine();
+    sha_engine.input(&[0, 20]);
+    sha_engine.input(pubkey_hash.as_ref());
+    crate::hashes::hash160::Hash::from_engine(sha_engine)
+}
+
+#[cfg(test)]
+mod tests {
+    use core::str::FromStr;
+
+    use hex_lit::hex;
+    use secp256k1::{XOnlyPublicKey};
+
+    use super::*;
+    use crate::crypto::key::PublicKey;
+    use crate::network::constants::Network::{Dash, Testnet};
+
+    fn roundtrips(addr: &Address) {
+        assert_eq!(
+            Address::from_str(&addr.to_string()).unwrap().assume_checked(),
+            *addr,
+            "string round-trip failed for {}",
+            addr,
+        );
+        assert_eq!(
+            Address::from_script(&addr.script_pubkey(), *addr.network()).as_ref(),
+            Ok(addr),
+            "script round-trip failed for {}",
+            addr,
+        );
+
+        #[cfg(feature = "serde")]
+        {
+            let ser = serde_json::to_string(addr).expect("failed to serialize address");
+            let back: Address<NetworkUnchecked> =
+                serde_json::from_str(&ser).expect("failed to deserialize address");
+            assert_eq!(back.assume_checked(), *addr, "serde round-trip failed for {}", addr)
+        }
+    }
+
+    #[test]
+    fn test_p2pkh_address_58() {
+        let addr = Address::new(
+            Dash,
+            Payload::PubkeyHash("162c5ea71c0b23f5b9022ef047c4a86470a5b070".parse().unwrap()),
+        );
+
+        assert_eq!(
+            addr.script_pubkey(),
+            ScriptBuf::from_hex("76a914162c5ea71c0b23f5b9022ef047c4a86470a5b07088ac").unwrap()
+        );
+        assert_eq!(&addr.to_string(), "Xci5rLWMqdQDy5uaCDVWEcTi6sfnkmqdUz");
+        assert_eq!(addr.address_type(), Some(AddressType::P2pkh));
+        roundtrips(&addr);
+    }
+
+    #[test]
+    fn test_p2pkh_from_key() {
+        let key = "048d5141948c1702e8c95f438815794b87f706a8d4cd2bffad1dc1570971032c9b6042a0431ded2478b5c9cf2d81c124a5e57347a3c63ef0e7716cf54d613ba183".parse::<PublicKey>().unwrap();
+        let addr = Address::p2pkh(&key, Dash);
+        assert_eq!(&addr.to_string(), "XyzL4FHjYiiQk9uhm6yCM4ewbkboBggYyo");
+
+        let key = "03df154ebfcf29d29cc10d5c2565018bce2d9edbab267c31d2caf44a63056cf99f"
+            .parse::<PublicKey>()
+            .unwrap();
+        let addr = Address::p2pkh(&key, Testnet);
+        assert_eq!(&addr.to_string(), "yWZBnVvSxS5xSq27dHVAJpuqbt7vvwGFL1");
+        assert_eq!(addr.address_type(), Some(AddressType::P2pkh));
+        roundtrips(&addr);
+    }
+
+    #[test]
+    fn test_p2sh_address_58() {
+        let addr = Address::new(
+            Dash,
+            Payload::ScriptHash("162c5ea71c0b23f5b9022ef047c4a86470a5b070".parse().unwrap()),
+        );
+
+        assert_eq!(
+            addr.script_pubkey(),
+            ScriptBuf::from_hex("a914162c5ea71c0b23f5b9022ef047c4a86470a5b07087").unwrap(),
+        );
+        assert_eq!(&addr.to_string(), "7URtmpd5Eobeu5YNj3WP968WLcDC86Kko6");
+        assert_eq!(addr.address_type(), Some(AddressType::P2sh));
+        roundtrips(&addr);
+    }
+
+    #[test]
+    fn test_p2sh_parse() {
+        let script = ScriptBuf::from_hex("552103a765fc35b3f210b95223846b36ef62a4e53e34e2925270c2c7906b92c9f718eb2103c327511374246759ec8d0b89fa6c6b23b33e11f92c5bc155409d86de0c79180121038cae7406af1f12f4786d820a1466eec7bc5785a1b5e4a387eca6d797753ef6db2103252bfb9dcaab0cd00353f2ac328954d791270203d66c2be8b430f115f451b8a12103e79412d42372c55dd336f2eb6eb639ef9d74a22041ba79382c74da2338fe58ad21035049459a4ebc00e876a9eef02e72a3e70202d3d1f591fc0dd542f93f642021f82102016f682920d9723c61b27f562eb530c926c00106004798b6471e8c52c60ee02057ae").unwrap();
+        let addr = Address::p2sh(&script, Testnet).unwrap();
+        assert_eq!(&addr.to_string(), "8qAmTPBdngNnZ1HoYDMjRWL4JYoF4Kdah4");
+        assert_eq!(addr.address_type(), Some(AddressType::P2sh));
+        roundtrips(&addr);
+    }
+
+    #[test]
+    fn test_p2sh_parse_for_large_script() {
+        let script = ScriptBuf::from_hex("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").unwrap();
+        assert_eq!(Address::p2sh(&script, Testnet), Err(Error::ExcessiveScriptSize));
+    }
+
+    #[ignore]
+    #[test]
+    fn test_p2wpkh() {
+        // stolen from Dash transaction: b3c8c2b6cfc335abbcb2c7823a8453f55d64b2b5125a9a61e8737230cdb8ce20
+        let mut key = "033bc8c83c52df5712229a2f72206d90192366c36428cb0c12b6af98324d97bfbc"
+            .parse::<PublicKey>()
+            .unwrap();
+        let addr = Address::p2wpkh(&key, Dash).unwrap();
+        assert_eq!(&addr.to_string(), "bc1qvzvkjn4q3nszqxrv3nraga2r822xjty3ykvkuw");
+        assert_eq!(addr.address_type(), Some(AddressType::P2wpkh));
+        roundtrips(&addr);
+
+        // Test uncompressed pubkey
+        key.compressed = false;
+        assert_eq!(Address::p2wpkh(&key, Dash), Err(Error::UncompressedPubkey));
+    }
+
+    #[ignore]
+    #[test]
+    fn test_p2wsh() {
+        // stolen from Dash transaction 5df912fda4becb1c29e928bec8d64d93e9ba8efa9b5b405bd683c86fd2c65667
+        let script = ScriptBuf::from_hex("52210375e00eb72e29da82b89367947f29ef34afb75e8654f6ea368e0acdfd92976b7c2103a1b26313f430c4b15bb1fdce663207659d8cac749a0e53d70eff01874496feff2103c96d495bfdd5ba4145e3e046fee45e84a8a48ad05bd8dbb395c011a32cf9f88053ae").unwrap();
+        let addr = Address::p2wsh(&script, Dash);
+        assert_eq!(
+            &addr.to_string(),
+            "bc1qwqdg6squsna38e46795at95yu9atm8azzmyvckulcc7kytlcckxswvvzej"
+        );
+        assert_eq!(addr.address_type(), Some(AddressType::P2wsh));
+        roundtrips(&addr);
+    }
+
+    #[test]
+    fn test_p2shwpkh() {
+        // stolen from Dash transaction: ad3fd9c6b52e752ba21425435ff3dd361d6ac271531fc1d2144843a9f550ad01
+        let mut key = "026c468be64d22761c30cd2f12cbc7de255d592d7904b1bab07236897cc4c2e766"
+            .parse::<PublicKey>()
+            .unwrap();
+        let addr = Address::p2shwpkh(&key, Dash).unwrap();
+        assert_eq!(&addr.to_string(), "7pu4bhf1eANQdvBoPH2FcDtDpMu4c7ZNuN");
+        assert_eq!(addr.address_type(), Some(AddressType::P2sh));
+        roundtrips(&addr);
+
+        // Test uncompressed pubkey
+        key.compressed = false;
+        assert_eq!(Address::p2wpkh(&key, Dash), Err(Error::UncompressedPubkey));
+    }
+
+    #[test]
+    fn test_p2shwsh() {
+        // stolen from Dash transaction f9ee2be4df05041d0e0a35d7caa3157495ca4f93b233234c9967b6901dacf7a9
+        let script = ScriptBuf::from_hex("522103e5529d8eaa3d559903adb2e881eb06c86ac2574ffa503c45f4e942e2a693b33e2102e5f10fcdcdbab211e0af6a481f5532536ec61a5fdbf7183770cf8680fe729d8152ae").unwrap();
+        let addr = Address::p2shwsh(&script, Dash);
+        assert_eq!(&addr.to_string(), "7WxUWa53KVEhSdBWwoB7LYMr2VedMZqoqt");
+        assert_eq!(addr.address_type(), Some(AddressType::P2sh));
+        roundtrips(&addr);
+    }
+
+    #[test]
+    fn test_non_existent_segwit_version() {
+        // 40-byte program
+        let program = hex!(
+            "654f6ea368e0acdfd92976b7c2103a1b26313f430654f6ea368e0acdfd92976b7c2103a1b26313f4"
+        );
+        let witness_prog = WitnessProgram::new(WitnessVersion::V13, program.to_vec()).unwrap();
+        let addr = Address::new(Dash, Payload::WitnessProgram(witness_prog));
+        roundtrips(&addr);
+    }
+
+    #[ignore]
+    #[test]
+    fn test_address_debug() {
+        // This is not really testing output of Debug but the ability and proper functioning
+        // of Debug derivation on structs generic in NetworkValidation.
+        #[derive(Debug)]
+        #[allow(unused)]
+        struct Test<V: NetworkValidation> {
+            address: Address<V>,
+        }
+
+        let addr_str = "33iFwdLuRpW1uK1RTRqsoi8rR4NpDzk66k";
+        let unchecked = Address::from_str(addr_str).unwrap();
+
+        assert_eq!(
+            format!("{:?}", Test { address: unchecked.clone() }),
+            format!("Test {{ address: Address<NetworkUnchecked>({}) }}", addr_str)
+        );
+
+        assert_eq!(
+            format!("{:?}", Test { address: unchecked.assume_checked() }),
+            format!("Test {{ address: {} }}", addr_str)
+        );
+    }
+
+    #[test]
+    fn test_address_type() {
+        let addresses = [
+            ("XmzfivrzYQ7B7oBMZKwPRdhjB1iNvX71XZ", Some(AddressType::P2pkh)),
+            ("7onv7GQcmoxJHdeDzTq2FGD9Q8Do9bxuFD", Some(AddressType::P2sh)),
+        ];
+        for (address, expected_type) in &addresses {
+            let addr = Address::from_str(address)
+                .unwrap()
+                .require_network(Network::Dash)
+                .expect("mainnet");
+            assert_eq!(&addr.address_type(), expected_type);
+        }
+    }
+
+    #[ignore]
+    #[test]
+    fn test_bip173_350_vectors() {
+        // Test vectors valid under both BIP-173 and BIP-350
+        let valid_vectors = [
+            ("BC1QW508D6QEJXTDG4Y5R3ZARVARY0C5XW7KV8F3T4", "0014751e76e8199196d454941c45d1b3a323f1433bd6"),
+            ("tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sl5k7", "00201863143c14c5166804bd19203356da136c985678cd4d27a1b8c6329604903262"),
+            ("bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7kt5nd6y", "5128751e76e8199196d454941c45d1b3a323f1433bd6751e76e8199196d454941c45d1b3a323f1433bd6"),
+            ("BC1SW50QGDZ25J", "6002751e"),
+            ("bc1zw508d6qejxtdg4y5r3zarvaryvaxxpcs", "5210751e76e8199196d454941c45d1b3a323"),
+            ("tb1qqqqqp399et2xygdj5xreqhjjvcmzhxw4aywxecjdzew6hylgvsesrxh6hy", "0020000000c4a5cad46221b2a187905e5266362b99d5e91c6ce24d165dab93e86433"),
+            ("tb1pqqqqp399et2xygdj5xreqhjjvcmzhxw4aywxecjdzew6hylgvsesf3hn0c", "5120000000c4a5cad46221b2a187905e5266362b99d5e91c6ce24d165dab93e86433"),
+            ("bc1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vqzk5jj0", "512079be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798")
+        ];
+        for vector in &valid_vectors {
+            let addr: Address = vector.0.parse::<Address<_>>().unwrap().assume_checked();
+            assert_eq!(&addr.script_pubkey().to_hex_string(), vector.1);
+            roundtrips(&addr);
+        }
+
+        let invalid_vectors = [
+            // 1. BIP-350 test vectors
+            // Invalid human-readable part
+            "tc1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vq5zuyut",
+            // Invalid checksums (Bech32 instead of Bech32m):
+            "bc1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vqh2y7hd",
+            "tb1z0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vqglt7rf",
+            "BC1S0XLXVLHEMJA6C4DQV22UAPCTQUPFHLXM9H8Z3K2E72Q4K9HCZ7VQ54WELL",
+            "bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kemeawh",
+            "tb1q0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vq24jc47",
+            // Invalid character in checksum
+            "bc1p38j9r5y49hruaue7wxjce0updqjuyyx0kh56v8s25huc6995vvpql3jow4",
+            // Invalid witness version
+            "BC130XLXVLHEMJA6C4DQV22UAPCTQUPFHLXM9H8Z3K2E72Q4K9HCZ7VQ7ZWS8R",
+            // Invalid program length (1 byte)
+            "bc1pw5dgrnzv",
+            // Invalid program length (41 bytes)
+            "bc1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7v8n0nx0muaewav253zgeav",
+            // Invalid program length for witness version 0 (per BIP141)
+            "BC1QR508D6QEJXTDG4Y5R3ZARVARYV98GJ9P",
+            // Mixed case
+            "tb1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vq47Zagq",
+            // zero padding of more than 4 bits
+            "bc1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7v07qwwzcrf",
+            // Non-zero padding in 8-to-5 conversion
+            "tb1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vpggkg4j",
+            // Empty data section
+            "bc1gmk9yu",
+            // 2. BIP-173 test vectors
+            // Invalid human-readable part
+            "tc1qw508d6qejxtdg4y5r3zarvary0c5xw7kg3g4ty",
+            // Invalid checksum
+            "bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t5",
+            // Invalid witness version
+            "BC13W508D6QEJXTDG4Y5R3ZARVARY0C5XW7KN40WF2",
+            // Invalid program length
+            "bc1rw5uspcuh",
+            // Invalid program length
+            "bc10w508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7kw5rljs90",
+            // Invalid program length for witness version 0 (per BIP141)
+            "BC1QR508D6QEJXTDG4Y5R3ZARVARYV98GJ9P",
+            // Mixed case
+            "tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sL5k7",
+            // zero padding of more than 4 bits
+            "bc1zw508d6qejxtdg4y5r3zarvaryvqyzf3du",
+            // Non-zero padding in 8-to-5 conversion
+            "tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3pjxtptv",
+            // Final test for empty data section is the same as above in BIP-350
+
+            // 3. BIP-173 valid test vectors obsolete by BIP-350
+            "bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7k7grplx",
+            "BC1SW50QA3JX3S",
+            "bc1zw508d6qejxtdg4y5r3zarvaryvg6kdaj",
+        ];
+        for vector in &invalid_vectors {
+            assert!(vector.parse::<Address<_>>().is_err());
+        }
+    }
+
+    #[test]
+    #[cfg(feature = "serde")]
+    #[ignore="TODO: adjust tests for dash addr"]
+    fn test_json_serialize() {
+        use serde_json;
+
+        let addr =
+            Address::from_str("132F25rTsvBdp9JzLLBHP5mvGY66i1xdiM").unwrap().assume_checked();
+        let json = serde_json::to_value(&addr).unwrap();
+        assert_eq!(
+            json,
+            serde_json::Value::String("132F25rTsvBdp9JzLLBHP5mvGY66i1xdiM".to_owned())
+        );
+        let into: Address = serde_json::from_value::<Address<_>>(json).unwrap().assume_checked();
+        assert_eq!(addr.to_string(), into.to_string());
+        assert_eq!(
+            into.script_pubkey(),
+            ScriptBuf::from_hex("76a914162c5ea71c0b23f5b9022ef047c4a86470a5b07088ac").unwrap()
+        );
+
+        let addr =
+            Address::from_str("33iFwdLuRpW1uK1RTRqsoi8rR4NpDzk66k").unwrap().assume_checked();
+        let json = serde_json::to_value(&addr).unwrap();
+        assert_eq!(
+            json,
+            serde_json::Value::String("33iFwdLuRpW1uK1RTRqsoi8rR4NpDzk66k".to_owned())
+        );
+        let into: Address = serde_json::from_value::<Address<_>>(json).unwrap().assume_checked();
+        assert_eq!(addr.to_string(), into.to_string());
+        assert_eq!(
+            into.script_pubkey(),
+            ScriptBuf::from_hex("a914162c5ea71c0b23f5b9022ef047c4a86470a5b07087").unwrap()
+        );
+
+        let addr: Address<NetworkUnchecked> =
+            Address::from_str("tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sl5k7")
+                .unwrap();
+        let json = serde_json::to_value(addr).unwrap();
+        assert_eq!(
+            json,
+            serde_json::Value::String(
+                "tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sl5k7".to_owned()
+            )
+        );
+
+        let addr =
+            Address::from_str("tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sl5k7")
+                .unwrap()
+                .assume_checked();
+        let json = serde_json::to_value(&addr).unwrap();
+        assert_eq!(
+            json,
+            serde_json::Value::String(
+                "tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sl5k7".to_owned()
+            )
+        );
+        let into: Address = serde_json::from_value::<Address<_>>(json).unwrap().assume_checked();
+        assert_eq!(addr.to_string(), into.to_string());
+        assert_eq!(
+            into.script_pubkey(),
+            ScriptBuf::from_hex(
+                "00201863143c14c5166804bd19203356da136c985678cd4d27a1b8c6329604903262"
+            )
+                .unwrap()
+        );
+
+        let addr = Address::from_str("bcrt1q2nfxmhd4n3c8834pj72xagvyr9gl57n5r94fsl")
+            .unwrap()
+            .assume_checked();
+        let json = serde_json::to_value(&addr).unwrap();
+        assert_eq!(
+            json,
+            serde_json::Value::String("bcrt1q2nfxmhd4n3c8834pj72xagvyr9gl57n5r94fsl".to_owned())
+        );
+        let into: Address = serde_json::from_value::<Address<_>>(json).unwrap().assume_checked();
+        assert_eq!(addr.to_string(), into.to_string());
+        assert_eq!(
+            into.script_pubkey(),
+            ScriptBuf::from_hex("001454d26dddb59c7073c6a197946ea1841951fa7a74").unwrap()
+        );
+    }
+
+    #[test]
+    fn test_qr_string() {
+        for el in
+        ["Xxb77sLZJZMUeYdf3TpWNoRFgEvjQkoi2q", "XanpivH7JqvtWsCkjB5vXqoGBhv4XGBRJn"].iter()
+        {
+            let addr =
+                Address::from_str(el).unwrap().require_network(Dash).expect("mainnet");
+            assert_eq!(addr.to_qr_uri(), format!("dash:{}", el));
+        }
+
+        // for el in ["dsrt1q2nfxmhd4n3c8834pj72xagvyr9gl57n5r94fsl", "ds1qwqdg6squsna38e46795at95yu9atm8azzmyvckulcc7kytlcckxswvvzej"].iter() {
+        //     let addr = Address::from_str(el).unwrap().assume_checked();
+        //     assert_eq!(addr.to_qr_uri(), format!("DASH:{}", el.to_ascii_uppercase()));
+        // }
+    }
+
+    #[test]
+    fn test_valid_networks() {
+        let legacy_payload = &[
+            Payload::PubkeyHash(PubkeyHash::all_zeros()),
+            Payload::ScriptHash(ScriptHash::all_zeros()),
+        ];
+        let segwit_payload = (0..=16)
+            .map(|version| {
+                Payload::WitnessProgram(
+                    WitnessProgram::new(
+                        WitnessVersion::try_from(version).unwrap(),
+                        vec![0xab; 32], // Choose 32 to make test case valid for all witness versions(including v0)
+                    )
+                        .unwrap(),
+                )
+            })
+            .collect::<Vec<_>>();
+
+        const LEGACY_EQUIVALENCE_CLASSES: &[&[Network]] =
+            &[
+                &[Network::Dash],
+                &[Network::Testnet, Network::Regtest, Network::Devnet],
+            ];
+        const SEGWIT_EQUIVALENCE_CLASSES: &[&[Network]] =
+            &[
+                &[Network::Dash],
+                &[Network::Regtest],
+                &[Network::Testnet, Network::Devnet],
+            ];
+
+        fn test_addr_type(payloads: &[Payload], equivalence_classes: &[&[Network]]) {
+            for pl in payloads {
+                for addr_net in equivalence_classes.iter().flat_map(|ec| ec.iter()) {
+                    for valid_net in equivalence_classes
+                        .iter()
+                        .filter(|ec| ec.contains(addr_net))
+                        .flat_map(|ec| ec.iter())
+                    {
+                        let addr = Address::new(*addr_net, pl.clone());
+                        assert!(addr.is_valid_for_network(*valid_net));
+                    }
+
+                    for invalid_net in equivalence_classes
+                        .iter()
+                        .filter(|ec| !ec.contains(addr_net))
+                        .flat_map(|ec| ec.iter())
+                    {
+                        let addr = Address::new(*addr_net, pl.clone());
+                        assert!(!addr.is_valid_for_network(*invalid_net));
+                    }
+                }
+            }
+        }
+
+        test_addr_type(legacy_payload, LEGACY_EQUIVALENCE_CLASSES);
+        test_addr_type(&segwit_payload, SEGWIT_EQUIVALENCE_CLASSES);
+    }
+
+    #[test]
+    fn p2tr_from_untweaked() {
+        //Test case from BIP-086
+        let internal_key = XOnlyPublicKey::from_str(
+            "cc8a4bc64d897bddc5fbc2f670f7a8ba0b386779106cf1223c6fc5d7cd6fc115",
+        )
+            .unwrap();
+        let secp = Secp256k1::verification_only();
+        let address = Address::p2tr(&secp, internal_key, None, Network::Dash);
+        assert_eq!(
+            address.to_string(),
+            "ds1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqq9xzlq"
+        );
+        assert_eq!(address.address_type(), Some(AddressType::P2tr));
+        roundtrips(&address);
+    }
+
+    #[ignore]
+    #[test]
+    fn test_is_related_to_pubkey_p2wpkh() {
+        let address_string = "bc1qhvd6suvqzjcu9pxjhrwhtrlj85ny3n2mqql5w4";
+        let address = Address::from_str(address_string)
+            .expect("address")
+            .require_network(Network::Dash)
+            .expect("mainnet");
+
+        let pubkey_string = "0347ff3dacd07a1f43805ec6808e801505a6e18245178609972a68afbc2777ff2b";
+        let pubkey = PublicKey::from_str(pubkey_string).expect("pubkey");
+
+        let result = address.is_related_to_pubkey(&pubkey);
+        assert!(result);
+
+        let unused_pubkey = PublicKey::from_str(
+            "02ba604e6ad9d3864eda8dc41c62668514ef7d5417d3b6db46e45cc4533bff001c",
+        )
+            .expect("pubkey");
+        assert!(!address.is_related_to_pubkey(&unused_pubkey))
+    }
+
+    #[test]
+    fn test_is_related_to_pubkey_p2shwpkh() {
+        let address_string = "7fH3aFXJ5TWv5eNScx7m4FCf3XD27mXYHq";
+        let address = Address::from_str(address_string)
+            .expect("address")
+            .require_network(Network::Dash)
+            .expect("mainnet");
+
+        let pubkey_string = "0347ff3dacd07a1f43805ec6808e801505a6e18245178609972a68afbc2777ff2b";
+        let pubkey = PublicKey::from_str(pubkey_string).expect("pubkey");
+
+        let result = address.is_related_to_pubkey(&pubkey);
+        assert!(result);
+
+        let unused_pubkey = PublicKey::from_str(
+            "02ba604e6ad9d3864eda8dc41c62668514ef7d5417d3b6db46e45cc4533bff001c",
+        )
+            .expect("pubkey");
+        assert!(!address.is_related_to_pubkey(&unused_pubkey))
+    }
+
+    #[test]
+    fn test_is_related_to_pubkey_p2pkh() {
+        let address_string = "XgjvsEewx8SHii5SFYM856eU2qGrJuZ3AN";
+        let address = Address::from_str(address_string)
+            .expect("address")
+            .require_network(Network::Dash)
+            .expect("mainnet");
+
+        let pubkey_string = "0370be7922711cf8e19923d40126d1fb1a7300d873019abd58c7984aeff44f8ce4";
+        let pubkey = PublicKey::from_str(pubkey_string).expect("pubkey");
+
+        let result = address.is_related_to_pubkey(&pubkey);
+        assert!(result);
+
+        let unused_pubkey = PublicKey::from_str(
+            "02ba604e6ad9d3864eda8dc41c62668514ef7d5417d3b6db46e45cc4533bff001c",
+        )
+            .expect("pubkey");
+        assert!(!address.is_related_to_pubkey(&unused_pubkey))
+    }
+
+    #[test]
+    fn test_is_related_to_pubkey_p2pkh_uncompressed_key() {
+        let address_string = "Xo6KeXZcaKyZCEMGioNYnsrPskpUZAZFhr";
+        let address = Address::from_str(address_string)
+            .expect("address")
+            .require_network(Network::Dash)
+            .expect("testnet");
+
+        let pubkey_string = "04e96e22004e3db93530de27ccddfdf1463975d2138ac018fc3e7ba1a2e5e0aad8e424d0b55e2436eb1d0dcd5cb2b8bcc6d53412c22f358de57803a6a655fbbd04";
+        let pubkey = PublicKey::from_str(pubkey_string).expect("pubkey");
+
+        let result = address.is_related_to_pubkey(&pubkey);
+        assert!(result);
+
+        let unused_pubkey = PublicKey::from_str(
+            "02ba604e6ad9d3864eda8dc41c62668514ef7d5417d3b6db46e45cc4533bff001c",
+        )
+            .expect("pubkey");
+        assert!(!address.is_related_to_pubkey(&unused_pubkey))
+    }
+
+    #[ignore]
+    #[test]
+    fn test_is_related_to_pubkey_p2tr() {
+        let pubkey_string = "0347ff3dacd07a1f43805ec6808e801505a6e18245178609972a68afbc2777ff2b";
+        let pubkey = PublicKey::from_str(pubkey_string).expect("pubkey");
+        let xonly_pubkey = XOnlyPublicKey::from(pubkey.inner);
+        let tweaked_pubkey = TweakedPublicKey::dangerous_assume_tweaked(xonly_pubkey);
+        let address = Address::p2tr_tweaked(tweaked_pubkey, Network::Dash);
+
+        assert_eq!(
+            address,
+            Address::from_str("bc1pgllnmtxs0g058qz7c6qgaqq4qknwrqj9z7rqn9e2dzhmcfmhlu4sfadf5e")
+                .expect("address")
+                .require_network(Network::Dash)
+                .expect("mainnet")
+        );
+
+        let result = address.is_related_to_pubkey(&pubkey);
+        assert!(result);
+
+        let unused_pubkey = PublicKey::from_str(
+            "02ba604e6ad9d3864eda8dc41c62668514ef7d5417d3b6db46e45cc4533bff001c",
+        )
+            .expect("pubkey");
+        assert!(!address.is_related_to_pubkey(&unused_pubkey));
+    }
+
+    #[ignore]
+    #[test]
+    fn test_is_related_to_xonly_pubkey() {
+        let pubkey_string = "0347ff3dacd07a1f43805ec6808e801505a6e18245178609972a68afbc2777ff2b";
+        let pubkey = PublicKey::from_str(pubkey_string).expect("pubkey");
+        let xonly_pubkey = XOnlyPublicKey::from(pubkey.inner);
+        let tweaked_pubkey = TweakedPublicKey::dangerous_assume_tweaked(xonly_pubkey);
+        let address = Address::p2tr_tweaked(tweaked_pubkey, Network::Dash);
+
+        assert_eq!(
+            address,
+            Address::from_str("bc1pgllnmtxs0g058qz7c6qgaqq4qknwrqj9z7rqn9e2dzhmcfmhlu4sfadf5e")
+                .expect("address")
+                .require_network(Network::Dash)
+                .expect("mainnet")
+        );
+
+        let result = address.is_related_to_xonly_pubkey(&xonly_pubkey);
+        assert!(result);
+    }
+
+    #[test]
+    fn test_fail_address_from_script() {
+        let bad_p2wpkh = ScriptBuf::from_hex("0014dbc5b0a8f9d4353b4b54c3db48846bb15abfec").unwrap();
+        let bad_p2wsh = ScriptBuf::from_hex(
+            "00202d4fa2eb233d008cc83206fa2f4f2e60199000f5b857a835e3172323385623",
+        )
+            .unwrap();
+        let invalid_segwitv0_script =
+            ScriptBuf::from_hex("001161458e330389cd0437ee9fe3641d70cc18").unwrap();
+        let expected = Err(Error::UnrecognizedScript);
+
+        assert_eq!(Address::from_script(&bad_p2wpkh, Network::Dash), expected);
+        assert_eq!(Address::from_script(&bad_p2wsh, Network::Dash), expected);
+        assert_eq!(
+            Address::from_script(&invalid_segwitv0_script, Network::Dash),
+            Err(Error::InvalidSegwitV0ProgramLength(17))
+        );
+    }
+
+    #[test]
+    fn valid_address_parses_correctly() {
+        let addr = AddressType::from_str("p2tr").expect("false negative while parsing address");
+        assert_eq!(addr, AddressType::P2tr);
+    }
+
+    #[test]
+    fn invalid_address_parses_error() {
+        let got = AddressType::from_str("invalid");
+        let want = Err(Error::UnknownAddressType("invalid".to_string()));
+        assert_eq!(got, want);
+    }
+
+    #[ignore]
+    #[test]
+    fn test_matches_script_pubkey() {
+        let addresses = [
+            "1QJVDzdqb1VpbDK7uDeyVXy9mR27CJiyhY",
+            "1J4LVanjHMu3JkXbVrahNuQCTGCRRgfWWx",
+            "33iFwdLuRpW1uK1RTRqsoi8rR4NpDzk66k",
+            "3QBRmWNqqBGme9er7fMkGqtZtp4gjMFxhE",
+            "bc1zw508d6qejxtdg4y5r3zarvaryvaxxpcs",
+            "bc1qvzvkjn4q3nszqxrv3nraga2r822xjty3ykvkuw",
+            "bc1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqkedrcr",
+            "bc1pgllnmtxs0g058qz7c6qgaqq4qknwrqj9z7rqn9e2dzhmcfmhlu4sfadf5e",
+        ];
+        for addr in &addresses {
+            let addr = Address::from_str(addr).unwrap().require_network(Network::Dash).unwrap();
+            for another in &addresses {
+                let another =
+                    Address::from_str(another).unwrap().require_network(Network::Dash).unwrap();
+                assert_eq!(addr.matches_script_pubkey(&another.script_pubkey()), addr == another);
+            }
+        }
+    }
+}
diff --git a/dash/src/amount.rs b/dash/src/amount.rs
new file mode 100644
index 000000000..01f6cc782
--- /dev/null
+++ b/dash/src/amount.rs
@@ -0,0 +1,2309 @@
+// SPDX-License-Identifier: CC0-1.0
+
+//! Bitcoin amounts.
+//!
+//! This module mainly introduces the [Amount] and [SignedAmount] types.
+//! We refer to the documentation on the types for more information.
+//!
+
+use core::cmp::Ordering;
+use core::fmt::{self, Write};
+use core::str::FromStr;
+use core::{default, ops};
+
+use crate::prelude::*;
+
+/// A set of denominations in which amounts can be expressed.
+///
+/// # Examples
+/// ```
+/// use core::str::FromStr;
+/// use dashcore::Amount;
+///
+/// assert_eq!(Amount::from_str("1 BTC").unwrap(), Amount::from_sat(100_000_000));
+/// assert_eq!(Amount::from_str("1 cBTC").unwrap(), Amount::from_sat(1_000_000));
+/// assert_eq!(Amount::from_str("1 mBTC").unwrap(), Amount::from_sat(100_000));
+/// assert_eq!(Amount::from_str("1 uBTC").unwrap(), Amount::from_sat(100));
+/// assert_eq!(Amount::from_str("10 nBTC").unwrap(), Amount::from_sat(1));
+/// assert_eq!(Amount::from_str("10000 pBTC").unwrap(), Amount::from_sat(1));
+/// assert_eq!(Amount::from_str("1 bit").unwrap(), Amount::from_sat(100));
+/// assert_eq!(Amount::from_str("1 sat").unwrap(), Amount::from_sat(1));
+/// assert_eq!(Amount::from_str("1000 msats").unwrap(), Amount::from_sat(1));
+/// ```
+#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
+#[non_exhaustive]
+pub enum Denomination {
+    /// DASH
+    Dash,
+    /// cDASH
+    CentiDash,
+    /// mDASH
+    MilliDash,
+    /// uDASH
+    MicroDash,
+    /// nDASH
+    NanoDash,
+    /// pDash
+    PicoDash,
+    /// bits
+    Bit,
+    /// satoshi
+    Satoshi,
+    /// msat
+    MilliSatoshi,
+}
+
+impl Denomination {
+    /// The number of decimal places more than a satoshi.
+    fn precision(self) -> i8 {
+        match self {
+            Denomination::Dash => -8,
+            Denomination::CentiDash => -6,
+            Denomination::MilliDash => -5,
+            Denomination::MicroDash => -2,
+            Denomination::NanoDash => 1,
+            Denomination::PicoDash => 4,
+            Denomination::Bit => -2,
+            Denomination::Satoshi => 0,
+            Denomination::MilliSatoshi => 3,
+        }
+    }
+
+    /// Returns stringly representation of this
+    fn as_str(self) -> &'static str {
+        match self {
+            Denomination::Dash => "BTC",
+            Denomination::CentiDash => "cBTC",
+            Denomination::MilliDash => "mBTC",
+            Denomination::MicroDash => "uBTC",
+            Denomination::NanoDash => "nBTC",
+            Denomination::PicoDash => "pBTC",
+            Denomination::Bit => "bits",
+            Denomination::Satoshi => "satoshi",
+            Denomination::MilliSatoshi => "msat",
+        }
+    }
+
+    /// The different str forms of denominations that are recognized.
+    fn forms(s: &str) -> Option<Self> {
+        match s {
+            "BTC" | "btc" => Some(Denomination::Dash),
+            "cBTC" | "cbtc" => Some(Denomination::CentiDash),
+            "mBTC" | "mbtc" => Some(Denomination::MilliDash),
+            "uBTC" | "ubtc" => Some(Denomination::MicroDash),
+            "nBTC" | "nbtc" => Some(Denomination::NanoDash),
+            "pBTC" | "pbtc" => Some(Denomination::PicoDash),
+            "bit" | "bits" | "BIT" | "BITS" => Some(Denomination::Bit),
+            "SATOSHI" | "satoshi" | "SATOSHIS" | "satoshis" | "SAT" | "sat" | "SATS" | "sats" =>
+                Some(Denomination::Satoshi),
+            "mSAT" | "msat" | "mSATs" | "msats" => Some(Denomination::MilliSatoshi),
+            _ => None,
+        }
+    }
+}
+
+/// These form are ambigous and could have many meanings.  For example, M could denote Mega or Milli.
+/// If any of these forms are used, an error type PossiblyConfusingDenomination is returned.
+const CONFUSING_FORMS: [&str; 9] =
+    ["Msat", "Msats", "MSAT", "MSATS", "MSat", "MSats", "MBTC", "Mbtc", "PBTC"];
+
+impl fmt::Display for Denomination {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { f.write_str(self.as_str()) }
+}
+
+impl FromStr for Denomination {
+    type Err = ParseAmountError;
+
+    /// Convert from a str to Denomination.
+    ///
+    /// Any combination of upper and/or lower case, excluding uppercase of SI(m, u, n, p) is considered valid.
+    /// - Singular: BTC, mBTC, uBTC, nBTC, pBTC
+    /// - Plural or singular: sat, satoshi, bit, msat
+    ///
+    /// Due to ambiguity between mega and milli, pico and peta we prohibit usage of leading capital 'M', 'P'.
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        use self::ParseAmountError::*;
+
+        if CONFUSING_FORMS.contains(&s) {
+            return Err(PossiblyConfusingDenomination(s.to_owned()));
+        };
+
+        let form = self::Denomination::forms(s);
+
+        form.ok_or_else(|| UnknownDenomination(s.to_owned()))
+    }
+}
+
+/// An error during amount parsing.
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[non_exhaustive]
+pub enum ParseAmountError {
+    /// Amount is negative.
+    Negative,
+    /// Amount is too big to fit inside the type.
+    TooBig,
+    /// Amount has higher precision than supported by the type.
+    TooPrecise,
+    /// Invalid number format.
+    InvalidFormat,
+    /// Input string was too large.
+    InputTooLarge,
+    /// Invalid character in input.
+    InvalidCharacter(char),
+    /// The denomination was unknown.
+    UnknownDenomination(String),
+    /// The denomination has multiple possible interpretations.
+    PossiblyConfusingDenomination(String),
+}
+
+impl fmt::Display for ParseAmountError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            ParseAmountError::Negative => f.write_str("amount is negative"),
+            ParseAmountError::TooBig => f.write_str("amount is too big"),
+            ParseAmountError::TooPrecise => f.write_str("amount has a too high precision"),
+            ParseAmountError::InvalidFormat => f.write_str("invalid number format"),
+            ParseAmountError::InputTooLarge => f.write_str("input string was too large"),
+            ParseAmountError::InvalidCharacter(c) => write!(f, "invalid character in input: {}", c),
+            ParseAmountError::UnknownDenomination(ref d) =>
+                write!(f, "unknown denomination: {}", d),
+            ParseAmountError::PossiblyConfusingDenomination(ref d) => {
+                let (letter, upper, lower) = match d.chars().next() {
+                    Some('M') => ('M', "Mega", "milli"),
+                    Some('P') => ('P', "Peta", "pico"),
+                    // This panic could be avoided by adding enum ConfusingDenomination { Mega, Peta } but is it worth it?
+                    _ => panic!("invalid error information"),
+                };
+                write!(f, "the '{}' at the beginning of {} should technically mean '{}' but that denomination is uncommon and maybe '{}' was intended", letter, d, upper, lower)
+            }
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for ParseAmountError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::ParseAmountError::*;
+
+        match *self {
+            Negative
+            | TooBig
+            | TooPrecise
+            | InvalidFormat
+            | InputTooLarge
+            | InvalidCharacter(_)
+            | UnknownDenomination(_)
+            | PossiblyConfusingDenomination(_) => None,
+        }
+    }
+}
+
+fn is_too_precise(s: &str, precision: usize) -> bool {
+    s.contains('.') || precision >= s.len() || s.chars().rev().take(precision).any(|d| d != '0')
+}
+
+/// Parse decimal string in the given denomination into a satoshi value and a
+/// bool indicator for a negative amount.
+fn parse_signed_to_satoshi(
+    mut s: &str,
+    denom: Denomination,
+) -> Result<(bool, u64), ParseAmountError> {
+    if s.is_empty() {
+        return Err(ParseAmountError::InvalidFormat);
+    }
+    if s.len() > 50 {
+        return Err(ParseAmountError::InputTooLarge);
+    }
+
+    let is_negative = s.starts_with('-');
+    if is_negative {
+        if s.len() == 1 {
+            return Err(ParseAmountError::InvalidFormat);
+        }
+        s = &s[1..];
+    }
+
+    let max_decimals = {
+        // The difference in precision between native (satoshi)
+        // and desired denomination.
+        let precision_diff = -denom.precision();
+        if precision_diff < 0 {
+            // If precision diff is negative, this means we are parsing
+            // into a less precise amount. That is not allowed unless
+            // there are no decimals and the last digits are zeroes as
+            // many as the difference in precision.
+            let last_n = unsigned_abs(precision_diff).into();
+            if is_too_precise(s, last_n) {
+                match s.parse::<i64>() {
+                    Ok(v) if v == 0_i64 => return Ok((is_negative, 0)),
+                    _ => return Err(ParseAmountError::TooPrecise),
+                }
+            }
+            s = &s[0..s.len() - last_n];
+            0
+        } else {
+            precision_diff
+        }
+    };
+
+    let mut decimals = None;
+    let mut value: u64 = 0; // as satoshis
+    for c in s.chars() {
+        match c {
+            '0'..='9' => {
+                // Do `value = 10 * value + digit`, catching overflows.
+                match 10_u64.checked_mul(value) {
+                    None => return Err(ParseAmountError::TooBig),
+                    Some(val) => match val.checked_add((c as u8 - b'0') as u64) {
+                        None => return Err(ParseAmountError::TooBig),
+                        Some(val) => value = val,
+                    },
+                }
+                // Increment the decimal digit counter if past decimal.
+                decimals = match decimals {
+                    None => None,
+                    Some(d) if d < max_decimals => Some(d + 1),
+                    _ => return Err(ParseAmountError::TooPrecise),
+                };
+            }
+            '.' => match decimals {
+                None => decimals = Some(0),
+                // Double decimal dot.
+                _ => return Err(ParseAmountError::InvalidFormat),
+            },
+            c => return Err(ParseAmountError::InvalidCharacter(c)),
+        }
+    }
+
+    // Decimally shift left by `max_decimals - decimals`.
+    let scale_factor = max_decimals - decimals.unwrap_or(0);
+    for _ in 0..scale_factor {
+        value = match 10_u64.checked_mul(value) {
+            Some(v) => v,
+            None => return Err(ParseAmountError::TooBig),
+        };
+    }
+
+    Ok((is_negative, value))
+}
+
+fn split_amount_and_denomination(s: &str) -> Result<(&str, Denomination), ParseAmountError> {
+    let (i, j) = if let Some(i) = s.find(' ') {
+        (i, i + 1)
+    } else {
+        let i = s.find(|c: char| c.is_alphabetic()).ok_or(ParseAmountError::InvalidFormat)?;
+        (i, i)
+    };
+    Ok((&s[..i], s[j..].parse()?))
+}
+
+/// Options given by `fmt::Formatter`
+struct FormatOptions {
+    fill: char,
+    align: Option<fmt::Alignment>,
+    width: Option<usize>,
+    precision: Option<usize>,
+    sign_plus: bool,
+    sign_aware_zero_pad: bool,
+}
+
+impl FormatOptions {
+    fn from_formatter(f: &fmt::Formatter) -> Self {
+        FormatOptions {
+            fill: f.fill(),
+            align: f.align(),
+            width: f.width(),
+            precision: f.precision(),
+            sign_plus: f.sign_plus(),
+            sign_aware_zero_pad: f.sign_aware_zero_pad(),
+        }
+    }
+}
+
+impl Default for FormatOptions {
+    fn default() -> Self {
+        FormatOptions {
+            fill: ' ',
+            align: None,
+            width: None,
+            precision: None,
+            sign_plus: false,
+            sign_aware_zero_pad: false,
+        }
+    }
+}
+
+fn dec_width(mut num: u64) -> usize {
+    let mut width = 1;
+    loop {
+        num /= 10;
+        if num == 0 {
+            break;
+        }
+        width += 1;
+    }
+    width
+}
+
+// NIH due to MSRV, impl copied from `core::i8::unsigned_abs` (introduced in Rust 1.51.1).
+fn unsigned_abs(x: i8) -> u8 { x.wrapping_abs() as u8 }
+
+fn repeat_char(f: &mut dyn fmt::Write, c: char, count: usize) -> fmt::Result {
+    for _ in 0..count {
+        f.write_char(c)?;
+    }
+    Ok(())
+}
+
+/// Format the given satoshi amount in the given denomination.
+fn fmt_satoshi_in(
+    satoshi: u64,
+    negative: bool,
+    f: &mut dyn fmt::Write,
+    denom: Denomination,
+    show_denom: bool,
+    options: FormatOptions,
+) -> fmt::Result {
+    let precision = denom.precision();
+    // First we normalize the number:
+    // {num_before_decimal_point}{:0exp}{"." if nb_decimals > 0}{:0nb_decimals}{num_after_decimal_point}{:0trailing_decimal_zeros}
+    let mut num_after_decimal_point = 0;
+    let mut norm_nb_decimals = 0;
+    let mut num_before_decimal_point = satoshi;
+    let trailing_decimal_zeros;
+    let mut exp = 0;
+    match precision.cmp(&0) {
+        // We add the number of zeroes to the end
+        Ordering::Greater => {
+            if satoshi > 0 {
+                exp = precision as usize;
+            }
+            trailing_decimal_zeros = options.precision.unwrap_or(0);
+        }
+        Ordering::Less => {
+            let precision = unsigned_abs(precision);
+            let divisor = 10u64.pow(precision.into());
+            num_before_decimal_point = satoshi / divisor;
+            num_after_decimal_point = satoshi % divisor;
+            // normalize by stripping trailing zeros
+            if num_after_decimal_point == 0 {
+                norm_nb_decimals = 0;
+            } else {
+                norm_nb_decimals = usize::from(precision);
+                while num_after_decimal_point % 10 == 0 {
+                    norm_nb_decimals -= 1;
+                    num_after_decimal_point /= 10
+                }
+            }
+            // compute requested precision
+            let opt_precision = options.precision.unwrap_or(0);
+            trailing_decimal_zeros = opt_precision.saturating_sub(norm_nb_decimals);
+        }
+        Ordering::Equal => trailing_decimal_zeros = options.precision.unwrap_or(0),
+    }
+    let total_decimals = norm_nb_decimals + trailing_decimal_zeros;
+    // Compute expected width of the number
+    let mut num_width = if total_decimals > 0 {
+        // 1 for decimal point
+        1 + total_decimals
+    } else {
+        0
+    };
+    num_width += dec_width(num_before_decimal_point) + exp;
+    if options.sign_plus || negative {
+        num_width += 1;
+    }
+
+    if show_denom {
+        // + 1 for space
+        num_width += denom.as_str().len() + 1;
+    }
+
+    let width = options.width.unwrap_or(0);
+    let align = options.align.unwrap_or(fmt::Alignment::Right);
+    let (left_pad, pad_right) = match (num_width < width, options.sign_aware_zero_pad, align) {
+        (false, _, _) => (0, 0),
+        // Alignment is always right (ignored) when zero-padding
+        (true, true, _) | (true, false, fmt::Alignment::Right) => (width - num_width, 0),
+        (true, false, fmt::Alignment::Left) => (0, width - num_width),
+        // If the required padding is odd it needs to be skewed to the left
+        (true, false, fmt::Alignment::Center) =>
+            ((width - num_width) / 2, (width - num_width + 1) / 2),
+    };
+
+    if !options.sign_aware_zero_pad {
+        repeat_char(f, options.fill, left_pad)?;
+    }
+
+    if negative {
+        write!(f, "-")?;
+    } else if options.sign_plus {
+        write!(f, "+")?;
+    }
+
+    if options.sign_aware_zero_pad {
+        repeat_char(f, '0', left_pad)?;
+    }
+
+    write!(f, "{}", num_before_decimal_point)?;
+
+    repeat_char(f, '0', exp)?;
+
+    if total_decimals > 0 {
+        write!(f, ".")?;
+    }
+    if norm_nb_decimals > 0 {
+        write!(f, "{:0width$}", num_after_decimal_point, width = norm_nb_decimals)?;
+    }
+    repeat_char(f, '0', trailing_decimal_zeros)?;
+
+    if show_denom {
+        write!(f, " {}", denom.as_str())?;
+    }
+
+    repeat_char(f, options.fill, pad_right)?;
+    Ok(())
+}
+
+/// Amount
+///
+/// The [Amount] type can be used to express Bitcoin amounts that support
+/// arithmetic and conversion to various denominations.
+///
+///
+/// Warning!
+///
+/// This type implements several arithmetic operations from [core::ops].
+/// To prevent errors due to overflow or underflow when using these operations,
+/// it is advised to instead use the checked arithmetic methods whose names
+/// start with `checked_`.  The operations from [core::ops] that [Amount]
+/// implements will panic when overflow or underflow occurs.  Also note that
+/// since the internal representation of amounts is unsigned, subtracting below
+/// zero is considered an underflow and will cause a panic if you're not using
+/// the checked arithmetic methods.
+///
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct Amount(u64);
+
+impl Amount {
+    /// The zero amount.
+    pub const ZERO: Amount = Amount(0);
+    /// Exactly one satoshi.
+    pub const ONE_SAT: Amount = Amount(1);
+    /// Exactly one dash.
+    pub const ONE_BTC: Amount = Amount(100_000_000);
+    /// The maximum value allowed as an amount. Useful for sanity checking.
+    pub const MAX_MONEY: Amount = Amount(21_000_000 * 100_000_000);
+
+    /// Create an [Amount] with satoshi precision and the given number of satoshis.
+    pub const fn from_sat(satoshi: u64) -> Amount { Amount(satoshi) }
+
+    /// Gets the number of satoshis in this [`Amount`].
+    pub fn to_sat(self) -> u64 { self.0 }
+
+    /// The maximum value of an [Amount].
+    pub const fn max_value() -> Amount { Amount(u64::max_value()) }
+
+    /// The minimum value of an [Amount].
+    pub const fn min_value() -> Amount { Amount(u64::min_value()) }
+
+    /// Convert from a value expressing bitcoins to an [Amount].
+    pub fn from_btc(btc: f64) -> Result<Amount, ParseAmountError> {
+        Amount::from_float_in(btc, Denomination::Dash)
+    }
+
+    /// Parse a decimal string as a value in the given denomination.
+    ///
+    /// Note: This only parses the value string.  If you want to parse a value
+    /// with denomination, use [FromStr].
+    pub fn from_str_in(s: &str, denom: Denomination) -> Result<Amount, ParseAmountError> {
+        let (negative, satoshi) = parse_signed_to_satoshi(s, denom)?;
+        if negative {
+            return Err(ParseAmountError::Negative);
+        }
+        if satoshi > i64::max_value() as u64 {
+            return Err(ParseAmountError::TooBig);
+        }
+        Ok(Amount::from_sat(satoshi))
+    }
+
+    /// Parses amounts with denomination suffix like they are produced with
+    /// [Self::to_string_with_denomination] or with [fmt::Display].
+    /// If you want to parse only the amount without the denomination,
+    /// use [Self::from_str_in].
+    pub fn from_str_with_denomination(s: &str) -> Result<Amount, ParseAmountError> {
+        let (amt, denom) = split_amount_and_denomination(s)?;
+        Amount::from_str_in(amt, denom)
+    }
+
+    /// Express this [Amount] as a floating-point value in the given denomination.
+    ///
+    /// Please be aware of the risk of using floating-point numbers.
+    pub fn to_float_in(self, denom: Denomination) -> f64 {
+        f64::from_str(&self.to_string_in(denom)).unwrap()
+    }
+
+    /// Express this [`Amount`] as a floating-point value in Bitcoin.
+    ///
+    /// Please be aware of the risk of using floating-point numbers.
+    ///
+    /// # Examples
+    /// ```
+    /// use dashcore::{Amount, Denomination};
+    /// let amount = Amount::from_sat(100_000);
+    /// assert_eq!(amount.to_dash(), amount.to_float_in(Denomination::Dash))
+    /// ```
+    pub fn to_dash(self) -> f64 { self.to_float_in(Denomination::Dash) }
+
+    /// Convert this [Amount] in floating-point notation with a given
+    /// denomination.
+    /// Can return error if the amount is too big, too precise or negative.
+    ///
+    /// Please be aware of the risk of using floating-point numbers.
+    pub fn from_float_in(value: f64, denom: Denomination) -> Result<Amount, ParseAmountError> {
+        if value < 0.0 {
+            return Err(ParseAmountError::Negative);
+        }
+        // This is inefficient, but the safest way to deal with this. The parsing logic is safe.
+        // Any performance-critical application should not be dealing with floats.
+        Amount::from_str_in(&value.to_string(), denom)
+    }
+
+    /// Create an object that implements [`fmt::Display`] using specified denomination.
+    pub fn display_in(self, denomination: Denomination) -> Display {
+        Display {
+            sats_abs: self.to_sat(),
+            is_negative: false,
+            style: DisplayStyle::FixedDenomination { denomination, show_denomination: false },
+        }
+    }
+
+    /// Create an object that implements [`fmt::Display`] dynamically selecting denomination.
+    ///
+    /// This will use BTC for values greater than or equal to 1 BTC and satoshis otherwise. To
+    /// avoid confusion the denomination is always shown.
+    pub fn display_dynamic(self) -> Display {
+        Display {
+            sats_abs: self.to_sat(),
+            is_negative: false,
+            style: DisplayStyle::DynamicDenomination,
+        }
+    }
+
+    /// Format the value of this [Amount] in the given denomination.
+    ///
+    /// Does not include the denomination.
+    #[rustfmt::skip]
+    pub fn fmt_value_in(self, f: &mut dyn fmt::Write, denom: Denomination) -> fmt::Result {
+        fmt_satoshi_in(self.to_sat(), false, f, denom, false, FormatOptions::default())
+    }
+
+    /// Get a string number of this [Amount] in the given denomination.
+    ///
+    /// Does not include the denomination.
+    pub fn to_string_in(self, denom: Denomination) -> String {
+        let mut buf = String::new();
+        self.fmt_value_in(&mut buf, denom).unwrap();
+        buf
+    }
+
+    /// Get a formatted string of this [Amount] in the given denomination,
+    /// suffixed with the abbreviation for the denomination.
+    pub fn to_string_with_denomination(self, denom: Denomination) -> String {
+        let mut buf = String::new();
+        self.fmt_value_in(&mut buf, denom).unwrap();
+        write!(buf, " {}", denom).unwrap();
+        buf
+    }
+
+    // Some arithmetic that doesn't fit in `core::ops` traits.
+
+    /// Checked addition.
+    /// Returns [None] if overflow occurred.
+    pub fn checked_add(self, rhs: Amount) -> Option<Amount> {
+        self.0.checked_add(rhs.0).map(Amount)
+    }
+
+    /// Checked subtraction.
+    /// Returns [None] if overflow occurred.
+    pub fn checked_sub(self, rhs: Amount) -> Option<Amount> {
+        self.0.checked_sub(rhs.0).map(Amount)
+    }
+
+    /// Checked multiplication.
+    /// Returns [None] if overflow occurred.
+    pub fn checked_mul(self, rhs: u64) -> Option<Amount> { self.0.checked_mul(rhs).map(Amount) }
+
+    /// Checked integer division.
+    /// Be aware that integer division loses the remainder if no exact division
+    /// can be made.
+    /// Returns [None] if overflow occurred.
+    pub fn checked_div(self, rhs: u64) -> Option<Amount> { self.0.checked_div(rhs).map(Amount) }
+
+    /// Checked remainder.
+    /// Returns [None] if overflow occurred.
+    pub fn checked_rem(self, rhs: u64) -> Option<Amount> { self.0.checked_rem(rhs).map(Amount) }
+
+    /// Convert to a signed amount.
+    pub fn to_signed(self) -> Result<SignedAmount, ParseAmountError> {
+        if self.to_sat() > SignedAmount::max_value().to_sat() as u64 {
+            Err(ParseAmountError::TooBig)
+        } else {
+            Ok(SignedAmount::from_sat(self.to_sat() as i64))
+        }
+    }
+}
+
+impl default::Default for Amount {
+    fn default() -> Self { Amount::ZERO }
+}
+
+impl fmt::Debug for Amount {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Amount({:.8} BTC)", self.to_dash())
+    }
+}
+
+// No one should depend on a binding contract for Display for this type.
+// Just using Bitcoin denominated string.
+impl fmt::Display for Amount {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        self.fmt_value_in(f, Denomination::Dash)?;
+        write!(f, " {}", Denomination::Dash)
+    }
+}
+
+impl ops::Add for Amount {
+    type Output = Amount;
+
+    fn add(self, rhs: Amount) -> Self::Output {
+        self.checked_add(rhs).expect("Amount addition error")
+    }
+}
+
+impl ops::AddAssign for Amount {
+    fn add_assign(&mut self, other: Amount) { *self = *self + other }
+}
+
+impl ops::Sub for Amount {
+    type Output = Amount;
+
+    fn sub(self, rhs: Amount) -> Self::Output {
+        self.checked_sub(rhs).expect("Amount subtraction error")
+    }
+}
+
+impl ops::SubAssign for Amount {
+    fn sub_assign(&mut self, other: Amount) { *self = *self - other }
+}
+
+impl ops::Rem<u64> for Amount {
+    type Output = Amount;
+
+    fn rem(self, modulus: u64) -> Self {
+        self.checked_rem(modulus).expect("Amount remainder error")
+    }
+}
+
+impl ops::RemAssign<u64> for Amount {
+    fn rem_assign(&mut self, modulus: u64) { *self = *self % modulus }
+}
+
+impl ops::Mul<u64> for Amount {
+    type Output = Amount;
+
+    fn mul(self, rhs: u64) -> Self::Output {
+        self.checked_mul(rhs).expect("Amount multiplication error")
+    }
+}
+
+impl ops::MulAssign<u64> for Amount {
+    fn mul_assign(&mut self, rhs: u64) { *self = *self * rhs }
+}
+
+impl ops::Div<u64> for Amount {
+    type Output = Amount;
+
+    fn div(self, rhs: u64) -> Self::Output { self.checked_div(rhs).expect("Amount division error") }
+}
+
+impl ops::DivAssign<u64> for Amount {
+    fn div_assign(&mut self, rhs: u64) { *self = *self / rhs }
+}
+
+impl FromStr for Amount {
+    type Err = ParseAmountError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> { Amount::from_str_with_denomination(s) }
+}
+
+impl core::iter::Sum for Amount {
+    fn sum<I: Iterator<Item = Self>>(iter: I) -> Self {
+        let sats: u64 = iter.map(|amt| amt.0).sum();
+        Amount::from_sat(sats)
+    }
+}
+
+/// A helper/builder that displays amount with specified settings.
+///
+/// This provides richer interface than `fmt::Formatter`:
+///
+/// * Ability to select denomination
+/// * Show or hide denomination
+/// * Dynamically-selected denomination - show in sats if less than 1 BTC.
+///
+/// However this can still be combined with `fmt::Formatter` options to precisely control zeros,
+/// padding, alignment... The formatting works like floats from `core` but note that precision will
+/// **never** be lossy - that means no rounding.
+///
+/// See [`Amount::display_in`] and [`Amount::display_dynamic`] on how to construct this.
+#[derive(Debug, Clone)]
+pub struct Display {
+    /// Absolute value of satoshis to display (sign is below)
+    sats_abs: u64,
+    /// The sign
+    is_negative: bool,
+    /// How to display the value
+    style: DisplayStyle,
+}
+
+impl Display {
+    /// Makes subsequent calls to `Display::fmt` display denomination.
+    pub fn show_denomination(mut self) -> Self {
+        match &mut self.style {
+            DisplayStyle::FixedDenomination { show_denomination, .. } => *show_denomination = true,
+            // No-op because dynamic denomination is always shown
+            DisplayStyle::DynamicDenomination => (),
+        }
+        self
+    }
+}
+
+impl fmt::Display for Display {
+    #[rustfmt::skip]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let format_options = FormatOptions::from_formatter(f);
+        match &self.style {
+            DisplayStyle::FixedDenomination { show_denomination, denomination } => {
+                fmt_satoshi_in(self.sats_abs, self.is_negative, f, *denomination, *show_denomination, format_options)
+            },
+            DisplayStyle::DynamicDenomination if self.sats_abs >= Amount::ONE_BTC.to_sat() => {
+                fmt_satoshi_in(self.sats_abs, self.is_negative, f, Denomination::Dash, true, format_options)
+            },
+            DisplayStyle::DynamicDenomination => {
+                fmt_satoshi_in(self.sats_abs, self.is_negative, f, Denomination::Satoshi, true, format_options)
+            },
+        }
+    }
+}
+
+#[derive(Clone, Debug)]
+enum DisplayStyle {
+    FixedDenomination { denomination: Denomination, show_denomination: bool },
+    DynamicDenomination,
+}
+
+/// SignedAmount
+///
+/// The [SignedAmount] type can be used to express Bitcoin amounts that support
+/// arithmetic and conversion to various denominations.
+///
+///
+/// Warning!
+///
+/// This type implements several arithmetic operations from [core::ops].
+/// To prevent errors due to overflow or underflow when using these operations,
+/// it is advised to instead use the checked arithmetic methods whose names
+/// start with `checked_`.  The operations from [core::ops] that [Amount]
+/// implements will panic when overflow or underflow occurs.
+///
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct SignedAmount(i64);
+
+impl SignedAmount {
+    /// The zero amount.
+    pub const ZERO: SignedAmount = SignedAmount(0);
+    /// Exactly one satoshi.
+    pub const ONE_SAT: SignedAmount = SignedAmount(1);
+    /// Exactly one dash.
+    pub const ONE_BTC: SignedAmount = SignedAmount(100_000_000);
+    /// The maximum value allowed as an amount. Useful for sanity checking.
+    pub const MAX_MONEY: SignedAmount = SignedAmount(21_000_000 * 100_000_000);
+
+    /// Create an [SignedAmount] with satoshi precision and the given number of satoshis.
+    pub const fn from_sat(satoshi: i64) -> SignedAmount { SignedAmount(satoshi) }
+
+    /// Gets the number of satoshis in this [`SignedAmount`].
+    pub fn to_sat(self) -> i64 { self.0 }
+
+    /// The maximum value of an [SignedAmount].
+    pub const fn max_value() -> SignedAmount { SignedAmount(i64::max_value()) }
+
+    /// The minimum value of an [SignedAmount].
+    pub const fn min_value() -> SignedAmount { SignedAmount(i64::min_value()) }
+
+    /// Convert from a value expressing bitcoins to an [SignedAmount].
+    pub fn from_btc(btc: f64) -> Result<SignedAmount, ParseAmountError> {
+        SignedAmount::from_float_in(btc, Denomination::Dash)
+    }
+
+    /// Parse a decimal string as a value in the given denomination.
+    ///
+    /// Note: This only parses the value string.  If you want to parse a value
+    /// with denomination, use [FromStr].
+    pub fn from_str_in(s: &str, denom: Denomination) -> Result<SignedAmount, ParseAmountError> {
+        let (negative, satoshi) = parse_signed_to_satoshi(s, denom)?;
+        if satoshi > i64::max_value() as u64 {
+            return Err(ParseAmountError::TooBig);
+        }
+        Ok(match negative {
+            true => SignedAmount(-(satoshi as i64)),
+            false => SignedAmount(satoshi as i64),
+        })
+    }
+
+    /// Parses amounts with denomination suffix like they are produced with
+    /// [Self::to_string_with_denomination] or with [fmt::Display].
+    /// If you want to parse only the amount without the denomination,
+    /// use [Self::from_str_in].
+    pub fn from_str_with_denomination(s: &str) -> Result<SignedAmount, ParseAmountError> {
+        let (amt, denom) = split_amount_and_denomination(s)?;
+        SignedAmount::from_str_in(amt, denom)
+    }
+
+    /// Express this [SignedAmount] as a floating-point value in the given denomination.
+    ///
+    /// Please be aware of the risk of using floating-point numbers.
+    pub fn to_float_in(self, denom: Denomination) -> f64 {
+        f64::from_str(&self.to_string_in(denom)).unwrap()
+    }
+
+    /// Express this [`SignedAmount`] as a floating-point value in Bitcoin.
+    ///
+    /// Equivalent to `to_float_in(Denomination::Bitcoin)`.
+    ///
+    /// Please be aware of the risk of using floating-point numbers.
+    pub fn to_btc(self) -> f64 { self.to_float_in(Denomination::Dash) }
+
+    /// Convert this [SignedAmount] in floating-point notation with a given
+    /// denomination.
+    /// Can return error if the amount is too big, too precise or negative.
+    ///
+    /// Please be aware of the risk of using floating-point numbers.
+    pub fn from_float_in(
+        value: f64,
+        denom: Denomination,
+    ) -> Result<SignedAmount, ParseAmountError> {
+        // This is inefficient, but the safest way to deal with this. The parsing logic is safe.
+        // Any performance-critical application should not be dealing with floats.
+        SignedAmount::from_str_in(&value.to_string(), denom)
+    }
+
+    /// Returns the absolute value as satoshis.
+    ///
+    /// This is the implementation of `unsigned_abs()` copied from `core` to support older MSRV.
+    fn to_sat_abs(self) -> u64 { self.to_sat().wrapping_abs() as u64 }
+
+    /// Create an object that implements [`fmt::Display`] using specified denomination.
+    pub fn display_in(self, denomination: Denomination) -> Display {
+        Display {
+            sats_abs: self.to_sat_abs(),
+            is_negative: self.is_negative(),
+            style: DisplayStyle::FixedDenomination { denomination, show_denomination: false },
+        }
+    }
+
+    /// Create an object that implements [`fmt::Display`] dynamically selecting denomination.
+    ///
+    /// This will use BTC for values greater than or equal to 1 BTC and satoshis otherwise. To
+    /// avoid confusion the denomination is always shown.
+    pub fn display_dynamic(self) -> Display {
+        Display {
+            sats_abs: self.to_sat_abs(),
+            is_negative: self.is_negative(),
+            style: DisplayStyle::DynamicDenomination,
+        }
+    }
+
+    /// Format the value of this [SignedAmount] in the given denomination.
+    ///
+    /// Does not include the denomination.
+    #[rustfmt::skip]
+    pub fn fmt_value_in(self, f: &mut dyn fmt::Write, denom: Denomination) -> fmt::Result {
+        fmt_satoshi_in(self.to_sat_abs(), self.is_negative(), f, denom, false, FormatOptions::default())
+    }
+
+    /// Get a string number of this [SignedAmount] in the given denomination.
+    ///
+    /// Does not include the denomination.
+    pub fn to_string_in(self, denom: Denomination) -> String {
+        let mut buf = String::new();
+        self.fmt_value_in(&mut buf, denom).unwrap();
+        buf
+    }
+
+    /// Get a formatted string of this [SignedAmount] in the given denomination,
+    /// suffixed with the abbreviation for the denomination.
+    pub fn to_string_with_denomination(self, denom: Denomination) -> String {
+        let mut buf = String::new();
+        self.fmt_value_in(&mut buf, denom).unwrap();
+        write!(buf, " {}", denom).unwrap();
+        buf
+    }
+
+    // Some arithmetic that doesn't fit in `core::ops` traits.
+
+    /// Get the absolute value of this [SignedAmount].
+    pub fn abs(self) -> SignedAmount { SignedAmount(self.0.abs()) }
+
+    /// Returns a number representing sign of this [SignedAmount].
+    ///
+    /// - `0` if the amount is zero
+    /// - `1` if the amount is positive
+    /// - `-1` if the amount is negative
+    pub fn signum(self) -> i64 { self.0.signum() }
+
+    /// Returns `true` if this [SignedAmount] is positive and `false` if
+    /// this [SignedAmount] is zero or negative.
+    pub fn is_positive(self) -> bool { self.0.is_positive() }
+
+    /// Returns `true` if this [SignedAmount] is negative and `false` if
+    /// this [SignedAmount] is zero or positive.
+    pub fn is_negative(self) -> bool { self.0.is_negative() }
+
+    /// Get the absolute value of this [SignedAmount].
+    /// Returns [None] if overflow occurred. (`self == min_value()`)
+    pub fn checked_abs(self) -> Option<SignedAmount> { self.0.checked_abs().map(SignedAmount) }
+
+    /// Checked addition.
+    /// Returns [None] if overflow occurred.
+    pub fn checked_add(self, rhs: SignedAmount) -> Option<SignedAmount> {
+        self.0.checked_add(rhs.0).map(SignedAmount)
+    }
+
+    /// Checked subtraction.
+    /// Returns [None] if overflow occurred.
+    pub fn checked_sub(self, rhs: SignedAmount) -> Option<SignedAmount> {
+        self.0.checked_sub(rhs.0).map(SignedAmount)
+    }
+
+    /// Checked multiplication.
+    /// Returns [None] if overflow occurred.
+    pub fn checked_mul(self, rhs: i64) -> Option<SignedAmount> {
+        self.0.checked_mul(rhs).map(SignedAmount)
+    }
+
+    /// Checked integer division.
+    /// Be aware that integer division loses the remainder if no exact division
+    /// can be made.
+    /// Returns [None] if overflow occurred.
+    pub fn checked_div(self, rhs: i64) -> Option<SignedAmount> {
+        self.0.checked_div(rhs).map(SignedAmount)
+    }
+
+    /// Checked remainder.
+    /// Returns [None] if overflow occurred.
+    pub fn checked_rem(self, rhs: i64) -> Option<SignedAmount> {
+        self.0.checked_rem(rhs).map(SignedAmount)
+    }
+
+    /// Subtraction that doesn't allow negative [SignedAmount]s.
+    /// Returns [None] if either [self], `rhs` or the result is strictly negative.
+    pub fn positive_sub(self, rhs: SignedAmount) -> Option<SignedAmount> {
+        if self.is_negative() || rhs.is_negative() || rhs > self {
+            None
+        } else {
+            self.checked_sub(rhs)
+        }
+    }
+
+    /// Convert to an unsigned amount.
+    pub fn to_unsigned(self) -> Result<Amount, ParseAmountError> {
+        if self.is_negative() {
+            Err(ParseAmountError::Negative)
+        } else {
+            Ok(Amount::from_sat(self.to_sat() as u64))
+        }
+    }
+}
+
+impl default::Default for SignedAmount {
+    fn default() -> Self { SignedAmount::ZERO }
+}
+
+impl fmt::Debug for SignedAmount {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "SignedAmount({:.8} BTC)", self.to_btc())
+    }
+}
+
+// No one should depend on a binding contract for Display for this type.
+// Just using Bitcoin denominated string.
+impl fmt::Display for SignedAmount {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        self.fmt_value_in(f, Denomination::Dash)?;
+        write!(f, " {}", Denomination::Dash)
+    }
+}
+
+impl ops::Add for SignedAmount {
+    type Output = SignedAmount;
+
+    fn add(self, rhs: SignedAmount) -> Self::Output {
+        self.checked_add(rhs).expect("SignedAmount addition error")
+    }
+}
+
+impl ops::AddAssign for SignedAmount {
+    fn add_assign(&mut self, other: SignedAmount) { *self = *self + other }
+}
+
+impl ops::Sub for SignedAmount {
+    type Output = SignedAmount;
+
+    fn sub(self, rhs: SignedAmount) -> Self::Output {
+        self.checked_sub(rhs).expect("SignedAmount subtraction error")
+    }
+}
+
+impl ops::SubAssign for SignedAmount {
+    fn sub_assign(&mut self, other: SignedAmount) { *self = *self - other }
+}
+
+impl ops::Rem<i64> for SignedAmount {
+    type Output = SignedAmount;
+
+    fn rem(self, modulus: i64) -> Self {
+        self.checked_rem(modulus).expect("SignedAmount remainder error")
+    }
+}
+
+impl ops::RemAssign<i64> for SignedAmount {
+    fn rem_assign(&mut self, modulus: i64) { *self = *self % modulus }
+}
+
+impl ops::Mul<i64> for SignedAmount {
+    type Output = SignedAmount;
+
+    fn mul(self, rhs: i64) -> Self::Output {
+        self.checked_mul(rhs).expect("SignedAmount multiplication error")
+    }
+}
+
+impl ops::MulAssign<i64> for SignedAmount {
+    fn mul_assign(&mut self, rhs: i64) { *self = *self * rhs }
+}
+
+impl ops::Div<i64> for SignedAmount {
+    type Output = SignedAmount;
+
+    fn div(self, rhs: i64) -> Self::Output {
+        self.checked_div(rhs).expect("SignedAmount division error")
+    }
+}
+
+impl ops::DivAssign<i64> for SignedAmount {
+    fn div_assign(&mut self, rhs: i64) { *self = *self / rhs }
+}
+
+impl FromStr for SignedAmount {
+    type Err = ParseAmountError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> { SignedAmount::from_str_with_denomination(s) }
+}
+
+impl core::iter::Sum for SignedAmount {
+    fn sum<I: Iterator<Item = Self>>(iter: I) -> Self {
+        let sats: i64 = iter.map(|amt| amt.0).sum();
+        SignedAmount::from_sat(sats)
+    }
+}
+
+/// Calculate the sum over the iterator using checked arithmetic.
+pub trait CheckedSum<R>: private::SumSeal<R> {
+    /// Calculate the sum over the iterator using checked arithmetic. If an over or underflow would
+    /// happen it returns `None`.
+    fn checked_sum(self) -> Option<R>;
+}
+
+impl<T> CheckedSum<Amount> for T
+    where
+        T: Iterator<Item = Amount>,
+{
+    fn checked_sum(mut self) -> Option<Amount> {
+        let first = Some(self.next().unwrap_or_default());
+
+        self.fold(first, |acc, item| acc.and_then(|acc| acc.checked_add(item)))
+    }
+}
+
+impl<T> CheckedSum<SignedAmount> for T
+    where
+        T: Iterator<Item = SignedAmount>,
+{
+    fn checked_sum(mut self) -> Option<SignedAmount> {
+        let first = Some(self.next().unwrap_or_default());
+
+        self.fold(first, |acc, item| acc.and_then(|acc| acc.checked_add(item)))
+    }
+}
+
+mod private {
+    use crate::{Amount, SignedAmount};
+
+    /// Used to seal the `CheckedSum` trait
+    pub trait SumSeal<A> {}
+
+    impl<T> SumSeal<Amount> for T where T: Iterator<Item = Amount> {}
+    impl<T> SumSeal<SignedAmount> for T where T: Iterator<Item = SignedAmount> {}
+}
+
+#[cfg(feature = "serde")]
+pub mod serde {
+    // methods are implementation of a standardized serde-specific signature
+    #![allow(missing_docs)]
+
+    //! This module adds serde serialization and deserialization support for Amounts.
+    //! Since there is not a default way to serialize and deserialize Amounts, multiple
+    //! ways are supported and it's up to the user to decide which serialiation to use.
+    //! The provided modules can be used as follows:
+    //!
+    //! ```rust,ignore
+    //! use serde::{Serialize, Deserialize};
+    //! use dash::Amount;
+    //!
+    //! #[derive(Serialize, Deserialize)]
+    //! # #[serde(crate = "actual_serde")]
+    //! pub struct HasAmount {
+    //!     #[serde(with = "dash::amount::serde::as_btc")]
+    //!     pub amount: Amount,
+    //! }
+    //! ```
+
+    use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
+    use crate::amount::{Amount, Denomination, SignedAmount};
+
+    /// This trait is used only to avoid code duplication and naming collisions
+    /// of the different serde serialization crates.
+    pub trait SerdeAmount: Copy + Sized + private::Sealed {
+        fn ser_sat<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error>;
+        fn des_sat<'d, D: Deserializer<'d>>(d: D) -> Result<Self, D::Error>;
+        fn ser_btc<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error>;
+        fn des_btc<'d, D: Deserializer<'d>>(d: D) -> Result<Self, D::Error>;
+    }
+
+    mod private {
+        /// add this as a trait bound to traits which consumers of this library
+        /// should not be able to implement.
+        pub trait Sealed {}
+        impl Sealed for super::Amount {}
+        impl Sealed for super::SignedAmount {}
+    }
+
+    /// This trait is only for internal Amount type serialization/deserialization
+    pub trait SerdeAmountForOpt: Copy + Sized + SerdeAmount + private::Sealed {
+        fn type_prefix() -> &'static str;
+        fn ser_sat_opt<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error>;
+        fn ser_btc_opt<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error>;
+    }
+
+    impl SerdeAmount for Amount {
+        fn ser_sat<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
+            u64::serialize(&self.to_sat(), s)
+        }
+        fn des_sat<'d, D: Deserializer<'d>>(d: D) -> Result<Self, D::Error> {
+            Ok(Amount::from_sat(u64::deserialize(d)?))
+        }
+        fn ser_btc<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
+            f64::serialize(&self.to_float_in(Denomination::Dash), s)
+        }
+        fn des_btc<'d, D: Deserializer<'d>>(d: D) -> Result<Self, D::Error> {
+            use serde::de::Error;
+            Amount::from_btc(f64::deserialize(d)?).map_err(D::Error::custom)
+        }
+    }
+
+    impl SerdeAmountForOpt for Amount {
+        fn type_prefix() -> &'static str { "u" }
+        fn ser_sat_opt<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
+            s.serialize_some(&self.to_sat())
+        }
+        fn ser_btc_opt<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
+            s.serialize_some(&self.to_dash())
+        }
+    }
+
+    impl SerdeAmount for SignedAmount {
+        fn ser_sat<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
+            i64::serialize(&self.to_sat(), s)
+        }
+        fn des_sat<'d, D: Deserializer<'d>>(d: D) -> Result<Self, D::Error> {
+            Ok(SignedAmount::from_sat(i64::deserialize(d)?))
+        }
+        fn ser_btc<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
+            f64::serialize(&self.to_float_in(Denomination::Dash), s)
+        }
+        fn des_btc<'d, D: Deserializer<'d>>(d: D) -> Result<Self, D::Error> {
+            use serde::de::Error;
+            SignedAmount::from_btc(f64::deserialize(d)?).map_err(D::Error::custom)
+        }
+    }
+
+    impl SerdeAmountForOpt for SignedAmount {
+        fn type_prefix() -> &'static str { "i" }
+        fn ser_sat_opt<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
+            s.serialize_some(&self.to_sat())
+        }
+        fn ser_btc_opt<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
+            s.serialize_some(&self.to_btc())
+        }
+    }
+
+    pub mod as_sat {
+        //! Serialize and deserialize [`Amount`](crate::Amount) as real numbers denominated in satoshi.
+        //! Use with `#[serde(with = "amount::serde::as_sat")]`.
+
+        use serde::{Deserializer, Serializer};
+
+        use crate::amount::serde::SerdeAmount;
+
+        pub fn serialize<A: SerdeAmount, S: Serializer>(a: &A, s: S) -> Result<S::Ok, S::Error> {
+            a.ser_sat(s)
+        }
+
+        pub fn deserialize<'d, A: SerdeAmount, D: Deserializer<'d>>(d: D) -> Result<A, D::Error> {
+            A::des_sat(d)
+        }
+
+        pub mod opt {
+            //! Serialize and deserialize [`Option<Amount>`](crate::Amount) as real numbers denominated in satoshi.
+            //! Use with `#[serde(default, with = "amount::serde::as_sat::opt")]`.
+
+            use core::fmt;
+            use core::marker::PhantomData;
+
+            use serde::{de, Deserializer, Serializer};
+
+            use crate::amount::serde::SerdeAmountForOpt;
+
+            pub fn serialize<A: SerdeAmountForOpt, S: Serializer>(
+                a: &Option<A>,
+                s: S,
+            ) -> Result<S::Ok, S::Error> {
+                match *a {
+                    Some(a) => a.ser_sat_opt(s),
+                    None => s.serialize_none(),
+                }
+            }
+
+            pub fn deserialize<'d, A: SerdeAmountForOpt, D: Deserializer<'d>>(
+                d: D,
+            ) -> Result<Option<A>, D::Error> {
+                struct VisitOptAmt<X>(PhantomData<X>);
+
+                impl<'de, X: SerdeAmountForOpt> de::Visitor<'de> for VisitOptAmt<X> {
+                    type Value = Option<X>;
+
+                    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                        write!(formatter, "An Option<{}64>", X::type_prefix())
+                    }
+
+                    fn visit_none<E>(self) -> Result<Self::Value, E>
+                        where
+                            E: de::Error,
+                    {
+                        Ok(None)
+                    }
+                    fn visit_some<D>(self, d: D) -> Result<Self::Value, D::Error>
+                        where
+                            D: Deserializer<'de>,
+                    {
+                        Ok(Some(X::des_sat(d)?))
+                    }
+                }
+                d.deserialize_option(VisitOptAmt::<A>(PhantomData))
+            }
+        }
+    }
+
+    pub mod as_btc {
+        //! Serialize and deserialize [`Amount`](crate::Amount) as JSON numbers denominated in BTC.
+        //! Use with `#[serde(with = "amount::serde::as_btc")]`.
+
+        use serde::{Deserializer, Serializer};
+
+        use crate::amount::serde::SerdeAmount;
+
+        pub fn serialize<A: SerdeAmount, S: Serializer>(a: &A, s: S) -> Result<S::Ok, S::Error> {
+            a.ser_btc(s)
+        }
+
+        pub fn deserialize<'d, A: SerdeAmount, D: Deserializer<'d>>(d: D) -> Result<A, D::Error> {
+            A::des_btc(d)
+        }
+
+        pub mod opt {
+            //! Serialize and deserialize `Option<Amount>` as JSON numbers denominated in BTC.
+            //! Use with `#[serde(default, with = "amount::serde::as_btc::opt")]`.
+
+            use core::fmt;
+            use core::marker::PhantomData;
+
+            use serde::{de, Deserializer, Serializer};
+
+            use crate::amount::serde::SerdeAmountForOpt;
+
+            pub fn serialize<A: SerdeAmountForOpt, S: Serializer>(
+                a: &Option<A>,
+                s: S,
+            ) -> Result<S::Ok, S::Error> {
+                match *a {
+                    Some(a) => a.ser_btc_opt(s),
+                    None => s.serialize_none(),
+                }
+            }
+
+            pub fn deserialize<'d, A: SerdeAmountForOpt, D: Deserializer<'d>>(
+                d: D,
+            ) -> Result<Option<A>, D::Error> {
+                struct VisitOptAmt<X>(PhantomData<X>);
+
+                impl<'de, X: SerdeAmountForOpt> de::Visitor<'de> for VisitOptAmt<X> {
+                    type Value = Option<X>;
+
+                    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                        write!(formatter, "An Option<f64>")
+                    }
+
+                    fn visit_none<E>(self) -> Result<Self::Value, E>
+                        where
+                            E: de::Error,
+                    {
+                        Ok(None)
+                    }
+                    fn visit_some<D>(self, d: D) -> Result<Self::Value, D::Error>
+                        where
+                            D: Deserializer<'de>,
+                    {
+                        Ok(Some(X::des_btc(d)?))
+                    }
+                }
+                d.deserialize_option(VisitOptAmt::<A>(PhantomData))
+            }
+        }
+    }
+}
+
+#[cfg(kani)]
+mod verification {
+    use std::cmp;
+    use std::convert::TryInto;
+
+    use super::*;
+
+    // Note regarding the `unwind` parameter: this defines how many iterations
+    // of loops kani will unwind before handing off to the SMT solver. Basically
+    // it should be set as low as possible such that Kani still succeeds (doesn't
+    // return "undecidable").
+    //
+    // There is more info here: https://model-checking.github.io/kani/tutorial-loop-unwinding.html
+    //
+    // Unfortunately what it means to "loop" is pretty opaque ... in this case
+    // there appear to be loops in memcmp, which I guess comes from assert_eq!,
+    // though I didn't see any failures until I added the to_signed() test.
+    // Further confusing the issue, a value of 2 works fine on my system, but on
+    // CI it fails, so we need to set it higher.
+    #[kani::unwind(4)]
+    #[kani::proof]
+    fn u_amount_add_homomorphic() {
+        let n1 = kani::any::<u64>();
+        let n2 = kani::any::<u64>();
+        kani::assume(n1.checked_add(n2).is_some()); // assume we don't overflow in the actual test
+        assert_eq!(Amount::from_sat(n1) + Amount::from_sat(n2), Amount::from_sat(n1 + n2));
+
+        let mut amt = Amount::from_sat(n1);
+        amt += Amount::from_sat(n2);
+        assert_eq!(amt, Amount::from_sat(n1 + n2));
+
+        let max = cmp::max(n1, n2);
+        let min = cmp::min(n1, n2);
+        assert_eq!(Amount::from_sat(max) - Amount::from_sat(min), Amount::from_sat(max - min));
+
+        let mut amt = Amount::from_sat(max);
+        amt -= Amount::from_sat(min);
+        assert_eq!(amt, Amount::from_sat(max - min));
+
+        assert_eq!(
+            Amount::from_sat(n1).to_signed(),
+            if n1 <= i64::MAX as u64 {
+                Ok(SignedAmount::from_sat(n1.try_into().unwrap()))
+            } else {
+                Err(ParseAmountError::TooBig)
+            },
+        );
+    }
+
+    #[kani::unwind(4)]
+    #[kani::proof]
+    fn u_amount_add_homomorphic_checked() {
+        let n1 = kani::any::<u64>();
+        let n2 = kani::any::<u64>();
+        assert_eq!(
+            Amount::from_sat(n1).checked_add(Amount::from_sat(n2)),
+            n1.checked_add(n2).map(Amount::from_sat),
+        );
+        assert_eq!(
+            Amount::from_sat(n1).checked_sub(Amount::from_sat(n2)),
+            n1.checked_sub(n2).map(Amount::from_sat),
+        );
+    }
+
+    #[kani::unwind(4)]
+    #[kani::proof]
+    fn s_amount_add_homomorphic() {
+        let n1 = kani::any::<i64>();
+        let n2 = kani::any::<i64>();
+        kani::assume(n1.checked_add(n2).is_some()); // assume we don't overflow in the actual test
+        kani::assume(n1.checked_sub(n2).is_some()); // assume we don't overflow in the actual test
+        assert_eq!(
+            SignedAmount::from_sat(n1) + SignedAmount::from_sat(n2),
+            SignedAmount::from_sat(n1 + n2)
+        );
+        assert_eq!(
+            SignedAmount::from_sat(n1) - SignedAmount::from_sat(n2),
+            SignedAmount::from_sat(n1 - n2)
+        );
+
+        let mut amt = SignedAmount::from_sat(n1);
+        amt += SignedAmount::from_sat(n2);
+        assert_eq!(amt, SignedAmount::from_sat(n1 + n2));
+        let mut amt = SignedAmount::from_sat(n1);
+        amt -= SignedAmount::from_sat(n2);
+        assert_eq!(amt, SignedAmount::from_sat(n1 - n2));
+
+        assert_eq!(
+            SignedAmount::from_sat(n1).to_unsigned(),
+            if n1 >= 0 {
+                Ok(Amount::from_sat(n1.try_into().unwrap()))
+            } else {
+                Err(ParseAmountError::Negative)
+            },
+        );
+    }
+
+    #[kani::unwind(4)]
+    #[kani::proof]
+    fn s_amount_add_homomorphic_checked() {
+        let n1 = kani::any::<i64>();
+        let n2 = kani::any::<i64>();
+        assert_eq!(
+            SignedAmount::from_sat(n1).checked_add(SignedAmount::from_sat(n2)),
+            n1.checked_add(n2).map(SignedAmount::from_sat),
+        );
+        assert_eq!(
+            SignedAmount::from_sat(n1).checked_sub(SignedAmount::from_sat(n2)),
+            n1.checked_sub(n2).map(SignedAmount::from_sat),
+        );
+
+        assert_eq!(
+            SignedAmount::from_sat(n1).positive_sub(SignedAmount::from_sat(n2)),
+            if n1 >= 0 && n2 >= 0 && n1 >= n2 {
+                Some(SignedAmount::from_sat(n1 - n2))
+            } else {
+                None
+            },
+        );
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use core::str::FromStr;
+    #[cfg(feature = "std")]
+    use std::panic;
+
+    #[cfg(feature = "serde")]
+    use serde_test;
+
+    use super::*;
+
+    #[test]
+    fn from_str_zero() {
+        let denoms = vec!["BTC", "mBTC", "uBTC", "nBTC", "pBTC", "bits", "sats", "msats"];
+        for denom in denoms {
+            for v in &["0", "000"] {
+                let s = format!("{} {}", v, denom);
+                match Amount::from_str(&s) {
+                    Err(e) => panic!("Failed to crate amount from {}: {:?}", s, e),
+                    Ok(amount) => assert_eq!(amount, Amount::from_sat(0)),
+                }
+            }
+
+            let s = format!("-0 {}", denom);
+            match Amount::from_str(&s) {
+                Err(e) => assert_eq!(e, ParseAmountError::Negative),
+                Ok(_) => panic!("Unsigned amount from {}", s),
+            }
+            match SignedAmount::from_str(&s) {
+                Err(e) => panic!("Failed to crate amount from {}: {:?}", s, e),
+                Ok(amount) => assert_eq!(amount, SignedAmount::from_sat(0)),
+            }
+        }
+    }
+
+    #[test]
+    fn mul_div() {
+        let sat = Amount::from_sat;
+        let ssat = SignedAmount::from_sat;
+
+        assert_eq!(sat(14) * 3, sat(42));
+        assert_eq!(sat(14) / 2, sat(7));
+        assert_eq!(sat(14) % 3, sat(2));
+        assert_eq!(ssat(-14) * 3, ssat(-42));
+        assert_eq!(ssat(-14) / 2, ssat(-7));
+        assert_eq!(ssat(-14) % 3, ssat(-2));
+
+        let mut b = ssat(30);
+        b /= 3;
+        assert_eq!(b, ssat(10));
+        b %= 3;
+        assert_eq!(b, ssat(1));
+    }
+
+    #[cfg(feature = "std")]
+    #[test]
+    fn test_overflows() {
+        // panic on overflow
+        let result = panic::catch_unwind(|| Amount::max_value() + Amount::from_sat(1));
+        assert!(result.is_err());
+        let result = panic::catch_unwind(|| Amount::from_sat(8446744073709551615) * 3);
+        assert!(result.is_err());
+    }
+
+    #[test]
+    fn checked_arithmetic() {
+        let sat = Amount::from_sat;
+        let ssat = SignedAmount::from_sat;
+
+        assert_eq!(SignedAmount::max_value().checked_add(ssat(1)), None);
+        assert_eq!(SignedAmount::min_value().checked_sub(ssat(1)), None);
+        assert_eq!(Amount::max_value().checked_add(sat(1)), None);
+        assert_eq!(Amount::min_value().checked_sub(sat(1)), None);
+
+        assert_eq!(sat(5).checked_div(2), Some(sat(2))); // integer division
+        assert_eq!(ssat(-6).checked_div(2), Some(ssat(-3)));
+    }
+
+    #[test]
+    fn floating_point() {
+        use super::Denomination as D;
+        let f = Amount::from_float_in;
+        let sf = SignedAmount::from_float_in;
+        let sat = Amount::from_sat;
+        let ssat = SignedAmount::from_sat;
+
+        assert_eq!(f(11.22, D::Dash), Ok(sat(1122000000)));
+        assert_eq!(sf(-11.22, D::MilliDash), Ok(ssat(-1122000)));
+        assert_eq!(f(11.22, D::Bit), Ok(sat(1122)));
+        assert_eq!(sf(-1000.0, D::MilliSatoshi), Ok(ssat(-1)));
+        assert_eq!(f(0.0001234, D::Dash), Ok(sat(12340)));
+        assert_eq!(sf(-0.00012345, D::Dash), Ok(ssat(-12345)));
+
+        assert_eq!(f(-100.0, D::MilliSatoshi), Err(ParseAmountError::Negative));
+        assert_eq!(f(11.22, D::Satoshi), Err(ParseAmountError::TooPrecise));
+        assert_eq!(sf(-100.0, D::MilliSatoshi), Err(ParseAmountError::TooPrecise));
+        assert_eq!(sf(-100.0, D::MilliSatoshi), Err(ParseAmountError::TooPrecise));
+        assert_eq!(f(42.123456781, D::Dash), Err(ParseAmountError::TooPrecise));
+        assert_eq!(sf(-184467440738.0, D::Dash), Err(ParseAmountError::TooBig));
+        assert_eq!(f(18446744073709551617.0, D::Satoshi), Err(ParseAmountError::TooBig));
+        assert_eq!(
+            f(SignedAmount::max_value().to_float_in(D::Satoshi) + 1.0, D::Satoshi),
+            Err(ParseAmountError::TooBig)
+        );
+        assert_eq!(
+            f(Amount::max_value().to_float_in(D::Satoshi) + 1.0, D::Satoshi),
+            Err(ParseAmountError::TooBig)
+        );
+
+        let btc = move |f| SignedAmount::from_btc(f).unwrap();
+        assert_eq!(btc(2.5).to_float_in(D::Dash), 2.5);
+        assert_eq!(btc(-2.5).to_float_in(D::MilliDash), -2500.0);
+        assert_eq!(btc(2.5).to_float_in(D::Satoshi), 250000000.0);
+        assert_eq!(btc(-2.5).to_float_in(D::MilliSatoshi), -250000000000.0);
+
+        let btc = move |f| Amount::from_btc(f).unwrap();
+        assert_eq!(&btc(0.0012).to_float_in(D::Dash).to_string(), "0.0012")
+    }
+
+    #[test]
+    #[allow(clippy::inconsistent_digit_grouping)] // Group to show 100,000,000 sats per dash.
+    fn parsing() {
+        use super::ParseAmountError as E;
+        let btc = Denomination::Dash;
+        let sat = Denomination::Satoshi;
+        let p = Amount::from_str_in;
+        let sp = SignedAmount::from_str_in;
+
+        assert_eq!(p("x", btc), Err(E::InvalidCharacter('x')));
+        assert_eq!(p("-", btc), Err(E::InvalidFormat));
+        assert_eq!(sp("-", btc), Err(E::InvalidFormat));
+        assert_eq!(p("-1.0x", btc), Err(E::InvalidCharacter('x')));
+        assert_eq!(p("0.0 ", btc), Err(ParseAmountError::InvalidCharacter(' ')));
+        assert_eq!(p("0.000.000", btc), Err(E::InvalidFormat));
+        let more_than_max = format!("1{}", Amount::max_value());
+        assert_eq!(p(&more_than_max, btc), Err(E::TooBig));
+        assert_eq!(p("0.000000042", btc), Err(E::TooPrecise));
+
+        assert_eq!(p("1", btc), Ok(Amount::from_sat(1_000_000_00)));
+        assert_eq!(sp("-.5", btc), Ok(SignedAmount::from_sat(-500_000_00)));
+        assert_eq!(p("1.1", btc), Ok(Amount::from_sat(1_100_000_00)));
+        assert_eq!(p("100", sat), Ok(Amount::from_sat(100)));
+        assert_eq!(p("55", sat), Ok(Amount::from_sat(55)));
+        assert_eq!(p("5500000000000000000", sat), Ok(Amount::from_sat(55_000_000_000_000_000_00)));
+        // Should this even pass?
+        assert_eq!(p("5500000000000000000.", sat), Ok(Amount::from_sat(55_000_000_000_000_000_00)));
+        assert_eq!(
+            p("12345678901.12345678", btc),
+            Ok(Amount::from_sat(12_345_678_901__123_456_78))
+        );
+
+        // make sure satoshi > i64::max_value() is checked.
+        let amount = Amount::from_sat(i64::max_value() as u64);
+        assert_eq!(Amount::from_str_in(&amount.to_string_in(sat), sat), Ok(amount));
+        assert_eq!(
+            Amount::from_str_in(&(amount + Amount(1)).to_string_in(sat), sat),
+            Err(E::TooBig)
+        );
+
+        assert_eq!(p("12.000", Denomination::MilliSatoshi), Err(E::TooPrecise));
+        // exactly 50 chars.
+        assert_eq!(
+            p("100000000000000.0000000000000000000000000000000000", Denomination::Dash),
+            Err(E::TooBig)
+        );
+        // more than 50 chars.
+        assert_eq!(
+            p("100000000000000.00000000000000000000000000000000000", Denomination::Dash),
+            Err(E::InputTooLarge)
+        );
+    }
+
+    #[test]
+    fn to_string() {
+        use super::Denomination as D;
+
+        assert_eq!(Amount::ONE_BTC.to_string_in(D::Dash), "1");
+        assert_eq!(format!("{:.8}", Amount::ONE_BTC.display_in(D::Dash)), "1.00000000");
+        assert_eq!(Amount::ONE_BTC.to_string_in(D::Satoshi), "100000000");
+        assert_eq!(Amount::ONE_SAT.to_string_in(D::Dash), "0.00000001");
+        assert_eq!(SignedAmount::from_sat(-42).to_string_in(D::Dash), "-0.00000042");
+
+        assert_eq!(Amount::ONE_BTC.to_string_with_denomination(D::Dash), "1 BTC");
+        assert_eq!(Amount::ONE_SAT.to_string_with_denomination(D::MilliSatoshi), "1000 msat");
+        assert_eq!(
+            SignedAmount::ONE_BTC.to_string_with_denomination(D::Satoshi),
+            "100000000 satoshi"
+        );
+        assert_eq!(Amount::ONE_SAT.to_string_with_denomination(D::Dash), "0.00000001 BTC");
+        assert_eq!(
+            SignedAmount::from_sat(-42).to_string_with_denomination(D::Dash),
+            "-0.00000042 BTC"
+        );
+    }
+
+    // May help identify a problem sooner
+    #[test]
+    fn test_repeat_char() {
+        let mut buf = String::new();
+        repeat_char(&mut buf, '0', 0).unwrap();
+        assert_eq!(buf.len(), 0);
+        repeat_char(&mut buf, '0', 42).unwrap();
+        assert_eq!(buf.len(), 42);
+        assert!(buf.chars().all(|c| c == '0'));
+    }
+
+    // Creates individual test functions to make it easier to find which check failed.
+    macro_rules! check_format_non_negative {
+        ($denom:ident; $($test_name:ident, $val:literal, $format_string:literal, $expected:literal);* $(;)?) => {
+            $(
+                #[test]
+                fn $test_name() {
+                    assert_eq!(format!($format_string, Amount::from_sat($val).display_in(Denomination::$denom)), $expected);
+                    assert_eq!(format!($format_string, SignedAmount::from_sat($val as i64).display_in(Denomination::$denom)), $expected);
+                }
+            )*
+        }
+    }
+
+    macro_rules! check_format_non_negative_show_denom {
+        ($denom:ident, $denom_suffix:literal; $($test_name:ident, $val:literal, $format_string:literal, $expected:literal);* $(;)?) => {
+            $(
+                #[test]
+                fn $test_name() {
+                    assert_eq!(format!($format_string, Amount::from_sat($val).display_in(Denomination::$denom).show_denomination()), concat!($expected, $denom_suffix));
+                    assert_eq!(format!($format_string, SignedAmount::from_sat($val as i64).display_in(Denomination::$denom).show_denomination()), concat!($expected, $denom_suffix));
+                }
+            )*
+        }
+    }
+
+    check_format_non_negative! {
+        Satoshi;
+        sat_check_fmt_non_negative_0, 0, "{}", "0";
+        sat_check_fmt_non_negative_1, 0, "{:2}", " 0";
+        sat_check_fmt_non_negative_2, 0, "{:02}", "00";
+        sat_check_fmt_non_negative_3, 0, "{:.1}", "0.0";
+        sat_check_fmt_non_negative_4, 0, "{:4.1}", " 0.0";
+        sat_check_fmt_non_negative_5, 0, "{:04.1}", "00.0";
+        sat_check_fmt_non_negative_6, 1, "{}", "1";
+        sat_check_fmt_non_negative_7, 1, "{:2}", " 1";
+        sat_check_fmt_non_negative_8, 1, "{:02}", "01";
+        sat_check_fmt_non_negative_9, 1, "{:.1}", "1.0";
+        sat_check_fmt_non_negative_10, 1, "{:4.1}", " 1.0";
+        sat_check_fmt_non_negative_11, 1, "{:04.1}", "01.0";
+        sat_check_fmt_non_negative_12, 10, "{}", "10";
+        sat_check_fmt_non_negative_13, 10, "{:2}", "10";
+        sat_check_fmt_non_negative_14, 10, "{:02}", "10";
+        sat_check_fmt_non_negative_15, 10, "{:3}", " 10";
+        sat_check_fmt_non_negative_16, 10, "{:03}", "010";
+        sat_check_fmt_non_negative_17, 10, "{:.1}", "10.0";
+        sat_check_fmt_non_negative_18, 10, "{:5.1}", " 10.0";
+        sat_check_fmt_non_negative_19, 10, "{:05.1}", "010.0";
+        sat_check_fmt_non_negative_20, 1, "{:<2}", "1 ";
+        sat_check_fmt_non_negative_21, 1, "{:<02}", "01";
+        sat_check_fmt_non_negative_22, 1, "{:<3.1}", "1.0";
+        sat_check_fmt_non_negative_23, 1, "{:<4.1}", "1.0 ";
+    }
+
+    check_format_non_negative_show_denom! {
+        Satoshi, " satoshi";
+        sat_check_fmt_non_negative_show_denom_0, 0, "{}", "0";
+        sat_check_fmt_non_negative_show_denom_1, 0, "{:2}", "0";
+        sat_check_fmt_non_negative_show_denom_2, 0, "{:02}", "0";
+        sat_check_fmt_non_negative_show_denom_3, 0, "{:9}", "0";
+        sat_check_fmt_non_negative_show_denom_4, 0, "{:09}", "0";
+        sat_check_fmt_non_negative_show_denom_5, 0, "{:10}", " 0";
+        sat_check_fmt_non_negative_show_denom_6, 0, "{:010}", "00";
+        sat_check_fmt_non_negative_show_denom_7, 0, "{:.1}", "0.0";
+        sat_check_fmt_non_negative_show_denom_8, 0, "{:11.1}", "0.0";
+        sat_check_fmt_non_negative_show_denom_9, 0, "{:011.1}", "0.0";
+        sat_check_fmt_non_negative_show_denom_10, 0, "{:12.1}", " 0.0";
+        sat_check_fmt_non_negative_show_denom_11, 0, "{:012.1}", "00.0";
+        sat_check_fmt_non_negative_show_denom_12, 1, "{}", "1";
+        sat_check_fmt_non_negative_show_denom_13, 1, "{:10}", " 1";
+        sat_check_fmt_non_negative_show_denom_14, 1, "{:010}", "01";
+        sat_check_fmt_non_negative_show_denom_15, 1, "{:.1}", "1.0";
+        sat_check_fmt_non_negative_show_denom_16, 1, "{:12.1}", " 1.0";
+        sat_check_fmt_non_negative_show_denom_17, 1, "{:012.1}", "01.0";
+        sat_check_fmt_non_negative_show_denom_18, 10, "{}", "10";
+        sat_check_fmt_non_negative_show_denom_19, 10, "{:10}", "10";
+        sat_check_fmt_non_negative_show_denom_20, 10, "{:010}", "10";
+        sat_check_fmt_non_negative_show_denom_21, 10, "{:11}", " 10";
+        sat_check_fmt_non_negative_show_denom_22, 10, "{:011}", "010";
+    }
+
+    check_format_non_negative! {
+        Dash;
+        btc_check_fmt_non_negative_0, 0, "{}", "0";
+        btc_check_fmt_non_negative_1, 0, "{:2}", " 0";
+        btc_check_fmt_non_negative_2, 0, "{:02}", "00";
+        btc_check_fmt_non_negative_3, 0, "{:.1}", "0.0";
+        btc_check_fmt_non_negative_4, 0, "{:4.1}", " 0.0";
+        btc_check_fmt_non_negative_5, 0, "{:04.1}", "00.0";
+        btc_check_fmt_non_negative_6, 1, "{}", "0.00000001";
+        btc_check_fmt_non_negative_7, 1, "{:2}", "0.00000001";
+        btc_check_fmt_non_negative_8, 1, "{:02}", "0.00000001";
+        btc_check_fmt_non_negative_9, 1, "{:.1}", "0.00000001";
+        btc_check_fmt_non_negative_10, 1, "{:11}", " 0.00000001";
+        btc_check_fmt_non_negative_11, 1, "{:11.1}", " 0.00000001";
+        btc_check_fmt_non_negative_12, 1, "{:011.1}", "00.00000001";
+        btc_check_fmt_non_negative_13, 1, "{:.9}", "0.000000010";
+        btc_check_fmt_non_negative_14, 1, "{:11.9}", "0.000000010";
+        btc_check_fmt_non_negative_15, 1, "{:011.9}", "0.000000010";
+        btc_check_fmt_non_negative_16, 1, "{:12.9}", " 0.000000010";
+        btc_check_fmt_non_negative_17, 1, "{:012.9}", "00.000000010";
+        btc_check_fmt_non_negative_18, 100_000_000, "{}", "1";
+        btc_check_fmt_non_negative_19, 100_000_000, "{:2}", " 1";
+        btc_check_fmt_non_negative_20, 100_000_000, "{:02}", "01";
+        btc_check_fmt_non_negative_21, 100_000_000, "{:.1}", "1.0";
+        btc_check_fmt_non_negative_22, 100_000_000, "{:4.1}", " 1.0";
+        btc_check_fmt_non_negative_23, 100_000_000, "{:04.1}", "01.0";
+        btc_check_fmt_non_negative_24, 110_000_000, "{}", "1.1";
+        btc_check_fmt_non_negative_25, 100_000_001, "{}", "1.00000001";
+        btc_check_fmt_non_negative_26, 100_000_001, "{:1}", "1.00000001";
+        btc_check_fmt_non_negative_27, 100_000_001, "{:.1}", "1.00000001";
+        btc_check_fmt_non_negative_28, 100_000_001, "{:10}", "1.00000001";
+        btc_check_fmt_non_negative_29, 100_000_001, "{:11}", " 1.00000001";
+        btc_check_fmt_non_negative_30, 100_000_001, "{:011}", "01.00000001";
+        btc_check_fmt_non_negative_31, 100_000_001, "{:.8}", "1.00000001";
+        btc_check_fmt_non_negative_32, 100_000_001, "{:.9}", "1.000000010";
+        btc_check_fmt_non_negative_33, 100_000_001, "{:11.9}", "1.000000010";
+        btc_check_fmt_non_negative_34, 100_000_001, "{:12.9}", " 1.000000010";
+        btc_check_fmt_non_negative_35, 100_000_001, "{:012.9}", "01.000000010";
+        btc_check_fmt_non_negative_36, 100_000_001, "{:+011.8}", "+1.00000001";
+        btc_check_fmt_non_negative_37, 100_000_001, "{:+12.8}", " +1.00000001";
+        btc_check_fmt_non_negative_38, 100_000_001, "{:+012.8}", "+01.00000001";
+        btc_check_fmt_non_negative_39, 100_000_001, "{:+12.9}", "+1.000000010";
+        btc_check_fmt_non_negative_40, 100_000_001, "{:+012.9}", "+1.000000010";
+        btc_check_fmt_non_negative_41, 100_000_001, "{:+13.9}", " +1.000000010";
+        btc_check_fmt_non_negative_42, 100_000_001, "{:+013.9}", "+01.000000010";
+        btc_check_fmt_non_negative_43, 100_000_001, "{:<10}", "1.00000001";
+        btc_check_fmt_non_negative_44, 100_000_001, "{:<11}", "1.00000001 ";
+        btc_check_fmt_non_negative_45, 100_000_001, "{:<011}", "01.00000001";
+        btc_check_fmt_non_negative_46, 100_000_001, "{:<11.9}", "1.000000010";
+        btc_check_fmt_non_negative_47, 100_000_001, "{:<12.9}", "1.000000010 ";
+        btc_check_fmt_non_negative_48, 100_000_001, "{:<12}", "1.00000001  ";
+        btc_check_fmt_non_negative_49, 100_000_001, "{:^11}", "1.00000001 ";
+        btc_check_fmt_non_negative_50, 100_000_001, "{:^11.9}", "1.000000010";
+        btc_check_fmt_non_negative_51, 100_000_001, "{:^12.9}", "1.000000010 ";
+        btc_check_fmt_non_negative_52, 100_000_001, "{:^12}", " 1.00000001 ";
+        btc_check_fmt_non_negative_53, 100_000_001, "{:^12.9}", "1.000000010 ";
+        btc_check_fmt_non_negative_54, 100_000_001, "{:^13.9}", " 1.000000010 ";
+    }
+
+    check_format_non_negative_show_denom! {
+        Dash, " BTC";
+        btc_check_fmt_non_negative_show_denom_0, 1, "{:14.1}", "0.00000001";
+        btc_check_fmt_non_negative_show_denom_1, 1, "{:14.8}", "0.00000001";
+        btc_check_fmt_non_negative_show_denom_2, 1, "{:15}", " 0.00000001";
+        btc_check_fmt_non_negative_show_denom_3, 1, "{:015}", "00.00000001";
+        btc_check_fmt_non_negative_show_denom_4, 1, "{:.9}", "0.000000010";
+        btc_check_fmt_non_negative_show_denom_5, 1, "{:15.9}", "0.000000010";
+        btc_check_fmt_non_negative_show_denom_6, 1, "{:16.9}", " 0.000000010";
+        btc_check_fmt_non_negative_show_denom_7, 1, "{:016.9}", "00.000000010";
+    }
+
+    check_format_non_negative_show_denom! {
+        Dash, " BTC ";
+        btc_check_fmt_non_negative_show_denom_align_0, 1, "{:<15}", "0.00000001";
+        btc_check_fmt_non_negative_show_denom_align_1, 1, "{:^15}", "0.00000001";
+        btc_check_fmt_non_negative_show_denom_align_2, 1, "{:^16}", " 0.00000001";
+    }
+
+    check_format_non_negative! {
+        MilliSatoshi;
+        msat_check_fmt_non_negative_0, 0, "{}", "0";
+        msat_check_fmt_non_negative_1, 1, "{}", "1000";
+        msat_check_fmt_non_negative_2, 1, "{:5}", " 1000";
+        msat_check_fmt_non_negative_3, 1, "{:05}", "01000";
+        msat_check_fmt_non_negative_4, 1, "{:.1}", "1000.0";
+        msat_check_fmt_non_negative_5, 1, "{:6.1}", "1000.0";
+        msat_check_fmt_non_negative_6, 1, "{:06.1}", "1000.0";
+        msat_check_fmt_non_negative_7, 1, "{:7.1}", " 1000.0";
+        msat_check_fmt_non_negative_8, 1, "{:07.1}", "01000.0";
+    }
+
+    #[test]
+    fn test_unsigned_signed_conversion() {
+        use super::ParseAmountError as E;
+        let sa = SignedAmount::from_sat;
+        let ua = Amount::from_sat;
+
+        assert_eq!(Amount::max_value().to_signed(), Err(E::TooBig));
+        assert_eq!(ua(i64::max_value() as u64).to_signed(), Ok(sa(i64::max_value())));
+        assert_eq!(ua(i64::max_value() as u64 + 1).to_signed(), Err(E::TooBig));
+
+        assert_eq!(sa(i64::max_value()).to_unsigned(), Ok(ua(i64::max_value() as u64)));
+
+        assert_eq!(
+            sa(i64::max_value()).to_unsigned().unwrap().to_signed(),
+            Ok(sa(i64::max_value()))
+        );
+    }
+
+    #[test]
+    #[allow(clippy::inconsistent_digit_grouping)] // Group to show 100,000,000 sats per dash.
+    fn from_str() {
+        use super::ParseAmountError as E;
+
+        assert_eq!(Amount::from_str("x BTC"), Err(E::InvalidCharacter('x')));
+        assert_eq!(Amount::from_str("xBTC"), Err(E::UnknownDenomination("xBTC".into())));
+        assert_eq!(Amount::from_str("5 BTC BTC"), Err(E::UnknownDenomination("BTC BTC".into())));
+        assert_eq!(Amount::from_str("5BTC BTC"), Err(E::InvalidCharacter('B')));
+        assert_eq!(Amount::from_str("5 5 BTC"), Err(E::UnknownDenomination("5 BTC".into())));
+
+        #[track_caller]
+        fn case(s: &str, expected: Result<Amount, ParseAmountError>) {
+            assert_eq!(Amount::from_str(s), expected);
+            assert_eq!(Amount::from_str(&s.replace(' ', "")), expected);
+        }
+
+        #[track_caller]
+        fn scase(s: &str, expected: Result<SignedAmount, ParseAmountError>) {
+            assert_eq!(SignedAmount::from_str(s), expected);
+            assert_eq!(SignedAmount::from_str(&s.replace(' ', "")), expected);
+        }
+
+        case("5 BCH", Err(E::UnknownDenomination("BCH".to_owned())));
+
+        case("-1 BTC", Err(E::Negative));
+        case("-0.0 BTC", Err(E::Negative));
+        case("0.123456789 BTC", Err(E::TooPrecise));
+        scase("-0.1 satoshi", Err(E::TooPrecise));
+        case("0.123456 mBTC", Err(E::TooPrecise));
+        scase("-1.001 bits", Err(E::TooPrecise));
+        scase("-200000000000 BTC", Err(E::TooBig));
+        case("18446744073709551616 sat", Err(E::TooBig));
+
+        case(".5 bits", Ok(Amount::from_sat(50)));
+        scase("-.5 bits", Ok(SignedAmount::from_sat(-50)));
+        case("0.00253583 BTC", Ok(Amount::from_sat(253583)));
+        scase("-5 satoshi", Ok(SignedAmount::from_sat(-5)));
+        case("0.10000000 BTC", Ok(Amount::from_sat(100_000_00)));
+        scase("-100 bits", Ok(SignedAmount::from_sat(-10_000)));
+    }
+
+    #[test]
+    #[allow(clippy::inconsistent_digit_grouping)] // Group to show 100,000,000 sats per dash.
+    fn to_from_string_in() {
+        use super::Denomination as D;
+        let ua_str = Amount::from_str_in;
+        let ua_sat = Amount::from_sat;
+        let sa_str = SignedAmount::from_str_in;
+        let sa_sat = SignedAmount::from_sat;
+
+        assert_eq!("0.5", Amount::from_sat(50).to_string_in(D::Bit));
+        assert_eq!("-0.5", SignedAmount::from_sat(-50).to_string_in(D::Bit));
+        assert_eq!("0.00253583", Amount::from_sat(253583).to_string_in(D::Dash));
+        assert_eq!("-5", SignedAmount::from_sat(-5).to_string_in(D::Satoshi));
+        assert_eq!("0.1", Amount::from_sat(100_000_00).to_string_in(D::Dash));
+        assert_eq!("-100", SignedAmount::from_sat(-10_000).to_string_in(D::Bit));
+        assert_eq!("2535830", Amount::from_sat(253583).to_string_in(D::NanoDash));
+        assert_eq!("-100000", SignedAmount::from_sat(-10_000).to_string_in(D::NanoDash));
+        assert_eq!("2535830000", Amount::from_sat(253583).to_string_in(D::PicoDash));
+        assert_eq!("-100000000", SignedAmount::from_sat(-10_000).to_string_in(D::PicoDash));
+
+        assert_eq!("0.50", format!("{:.2}", Amount::from_sat(50).display_in(D::Bit)));
+        assert_eq!("-0.50", format!("{:.2}", SignedAmount::from_sat(-50).display_in(D::Bit)));
+        assert_eq!(
+            "0.10000000",
+            format!("{:.8}", Amount::from_sat(100_000_00).display_in(D::Dash))
+        );
+        assert_eq!("-100.00", format!("{:.2}", SignedAmount::from_sat(-10_000).display_in(D::Bit)));
+
+        assert_eq!(ua_str(&ua_sat(0).to_string_in(D::Satoshi), D::Satoshi), Ok(ua_sat(0)));
+        assert_eq!(ua_str(&ua_sat(500).to_string_in(D::Dash), D::Dash), Ok(ua_sat(500)));
+        assert_eq!(
+            ua_str(&ua_sat(21_000_000).to_string_in(D::Bit), D::Bit),
+            Ok(ua_sat(21_000_000))
+        );
+        assert_eq!(
+            ua_str(&ua_sat(1).to_string_in(D::MicroDash), D::MicroDash),
+            Ok(ua_sat(1))
+        );
+        assert_eq!(
+            ua_str(&ua_sat(1_000_000_000_000).to_string_in(D::MilliDash), D::MilliDash),
+            Ok(ua_sat(1_000_000_000_000))
+        );
+        assert_eq!(
+            ua_str(&ua_sat(u64::max_value()).to_string_in(D::MilliDash), D::MilliDash),
+            Err(ParseAmountError::TooBig)
+        );
+
+        assert_eq!(
+            sa_str(&sa_sat(-1).to_string_in(D::MicroDash), D::MicroDash),
+            Ok(sa_sat(-1))
+        );
+
+        assert_eq!(
+            sa_str(&sa_sat(i64::max_value()).to_string_in(D::Satoshi), D::MicroDash),
+            Err(ParseAmountError::TooBig)
+        );
+        // Test an overflow bug in `abs()`
+        assert_eq!(
+            sa_str(&sa_sat(i64::min_value()).to_string_in(D::Satoshi), D::MicroDash),
+            Err(ParseAmountError::TooBig)
+        );
+
+        assert_eq!(
+            sa_str(&sa_sat(-1).to_string_in(D::NanoDash), D::NanoDash),
+            Ok(sa_sat(-1))
+        );
+        assert_eq!(
+            sa_str(&sa_sat(i64::max_value()).to_string_in(D::Satoshi), D::NanoDash),
+            Err(ParseAmountError::TooPrecise)
+        );
+        assert_eq!(
+            sa_str(&sa_sat(i64::min_value()).to_string_in(D::Satoshi), D::NanoDash),
+            Err(ParseAmountError::TooPrecise)
+        );
+
+        assert_eq!(
+            sa_str(&sa_sat(-1).to_string_in(D::PicoDash), D::PicoDash),
+            Ok(sa_sat(-1))
+        );
+        assert_eq!(
+            sa_str(&sa_sat(i64::max_value()).to_string_in(D::Satoshi), D::PicoDash),
+            Err(ParseAmountError::TooPrecise)
+        );
+        assert_eq!(
+            sa_str(&sa_sat(i64::min_value()).to_string_in(D::Satoshi), D::PicoDash),
+            Err(ParseAmountError::TooPrecise)
+        );
+    }
+
+    #[test]
+    fn to_string_with_denomination_from_str_roundtrip() {
+        use super::Denomination as D;
+        let amt = Amount::from_sat(42);
+        let denom = Amount::to_string_with_denomination;
+        assert_eq!(Amount::from_str(&denom(amt, D::Dash)), Ok(amt));
+        assert_eq!(Amount::from_str(&denom(amt, D::MilliDash)), Ok(amt));
+        assert_eq!(Amount::from_str(&denom(amt, D::MicroDash)), Ok(amt));
+        assert_eq!(Amount::from_str(&denom(amt, D::Bit)), Ok(amt));
+        assert_eq!(Amount::from_str(&denom(amt, D::Satoshi)), Ok(amt));
+        assert_eq!(Amount::from_str(&denom(amt, D::NanoDash)), Ok(amt));
+        assert_eq!(Amount::from_str(&denom(amt, D::MilliSatoshi)), Ok(amt));
+        assert_eq!(Amount::from_str(&denom(amt, D::PicoDash)), Ok(amt));
+
+        assert_eq!(
+            Amount::from_str("42 satoshi BTC"),
+            Err(ParseAmountError::UnknownDenomination("satoshi BTC".into())),
+        );
+        assert_eq!(
+            SignedAmount::from_str("-42 satoshi BTC"),
+            Err(ParseAmountError::UnknownDenomination("satoshi BTC".into())),
+        );
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn serde_as_sat() {
+        #[derive(Serialize, Deserialize, PartialEq, Debug)]
+        #[serde(crate = "actual_serde")]
+        struct T {
+            #[serde(with = "crate::amount::serde::as_sat")]
+            pub amt: Amount,
+            #[serde(with = "crate::amount::serde::as_sat")]
+            pub samt: SignedAmount,
+        }
+
+        serde_test::assert_tokens(
+            &T { amt: Amount::from_sat(123456789), samt: SignedAmount::from_sat(-123456789) },
+            &[
+                serde_test::Token::Struct { name: "T", len: 2 },
+                serde_test::Token::Str("amt"),
+                serde_test::Token::U64(123456789),
+                serde_test::Token::Str("samt"),
+                serde_test::Token::I64(-123456789),
+                serde_test::Token::StructEnd,
+            ],
+        );
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    #[allow(clippy::inconsistent_digit_grouping)] // Group to show 100,000,000 sats per dash.
+    fn serde_as_btc() {
+        use serde_json;
+
+        #[derive(Serialize, Deserialize, PartialEq, Debug)]
+        #[serde(crate = "actual_serde")]
+        struct T {
+            #[serde(with = "crate::amount::serde::as_btc")]
+            pub amt: Amount,
+            #[serde(with = "crate::amount::serde::as_btc")]
+            pub samt: SignedAmount,
+        }
+
+        let orig = T {
+            amt: Amount::from_sat(21_000_000__000_000_01),
+            samt: SignedAmount::from_sat(-21_000_000__000_000_01),
+        };
+
+        let json = "{\"amt\": 21000000.00000001, \
+                    \"samt\": -21000000.00000001}";
+        let t: T = serde_json::from_str(json).unwrap();
+        assert_eq!(t, orig);
+
+        let value: serde_json::Value = serde_json::from_str(json).unwrap();
+        assert_eq!(t, serde_json::from_value(value).unwrap());
+
+        // errors
+        let t: Result<T, serde_json::Error> =
+            serde_json::from_str("{\"amt\": 1000000.000000001, \"samt\": 1}");
+        assert!(t.unwrap_err().to_string().contains(&ParseAmountError::TooPrecise.to_string()));
+        let t: Result<T, serde_json::Error> = serde_json::from_str("{\"amt\": -1, \"samt\": 1}");
+        assert!(t.unwrap_err().to_string().contains(&ParseAmountError::Negative.to_string()));
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    #[allow(clippy::inconsistent_digit_grouping)] // Group to show 100,000,000 sats per dash.
+    fn serde_as_btc_opt() {
+        use serde_json;
+
+        #[derive(Serialize, Deserialize, PartialEq, Debug, Eq)]
+        #[serde(crate = "actual_serde")]
+        struct T {
+            #[serde(default, with = "crate::amount::serde::as_btc::opt")]
+            pub amt: Option<Amount>,
+            #[serde(default, with = "crate::amount::serde::as_btc::opt")]
+            pub samt: Option<SignedAmount>,
+        }
+
+        let with = T {
+            amt: Some(Amount::from_sat(2_500_000_00)),
+            samt: Some(SignedAmount::from_sat(-2_500_000_00)),
+        };
+        let without = T { amt: None, samt: None };
+
+        // Test Roundtripping
+        for s in [&with, &without].iter() {
+            let v = serde_json::to_string(s).unwrap();
+            let w: T = serde_json::from_str(&v).unwrap();
+            assert_eq!(w, **s);
+        }
+
+        let t: T = serde_json::from_str("{\"amt\": 2.5, \"samt\": -2.5}").unwrap();
+        assert_eq!(t, with);
+
+        let t: T = serde_json::from_str("{}").unwrap();
+        assert_eq!(t, without);
+
+        let value_with: serde_json::Value =
+            serde_json::from_str("{\"amt\": 2.5, \"samt\": -2.5}").unwrap();
+        assert_eq!(with, serde_json::from_value(value_with).unwrap());
+
+        let value_without: serde_json::Value = serde_json::from_str("{}").unwrap();
+        assert_eq!(without, serde_json::from_value(value_without).unwrap());
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    #[allow(clippy::inconsistent_digit_grouping)] // Group to show 100,000,000 sats per dash.
+    fn serde_as_sat_opt() {
+        use serde_json;
+
+        #[derive(Serialize, Deserialize, PartialEq, Debug, Eq)]
+        #[serde(crate = "actual_serde")]
+        struct T {
+            #[serde(default, with = "crate::amount::serde::as_sat::opt")]
+            pub amt: Option<Amount>,
+            #[serde(default, with = "crate::amount::serde::as_sat::opt")]
+            pub samt: Option<SignedAmount>,
+        }
+
+        let with = T {
+            amt: Some(Amount::from_sat(2_500_000_00)),
+            samt: Some(SignedAmount::from_sat(-2_500_000_00)),
+        };
+        let without = T { amt: None, samt: None };
+
+        // Test Roundtripping
+        for s in [&with, &without].iter() {
+            let v = serde_json::to_string(s).unwrap();
+            let w: T = serde_json::from_str(&v).unwrap();
+            assert_eq!(w, **s);
+        }
+
+        let t: T = serde_json::from_str("{\"amt\": 250000000, \"samt\": -250000000}").unwrap();
+        assert_eq!(t, with);
+
+        let t: T = serde_json::from_str("{}").unwrap();
+        assert_eq!(t, without);
+
+        let value_with: serde_json::Value =
+            serde_json::from_str("{\"amt\": 250000000, \"samt\": -250000000}").unwrap();
+        assert_eq!(with, serde_json::from_value(value_with).unwrap());
+
+        let value_without: serde_json::Value = serde_json::from_str("{}").unwrap();
+        assert_eq!(without, serde_json::from_value(value_without).unwrap());
+    }
+
+    #[test]
+    fn sum_amounts() {
+        assert_eq!(Amount::from_sat(0), vec![].into_iter().sum::<Amount>());
+        assert_eq!(SignedAmount::from_sat(0), vec![].into_iter().sum::<SignedAmount>());
+
+        let amounts = vec![Amount::from_sat(42), Amount::from_sat(1337), Amount::from_sat(21)];
+        let sum = amounts.into_iter().sum::<Amount>();
+        assert_eq!(Amount::from_sat(1400), sum);
+
+        let amounts = vec![
+            SignedAmount::from_sat(-42),
+            SignedAmount::from_sat(1337),
+            SignedAmount::from_sat(21),
+        ];
+        let sum = amounts.into_iter().sum::<SignedAmount>();
+        assert_eq!(SignedAmount::from_sat(1316), sum);
+    }
+
+    #[test]
+    fn checked_sum_amounts() {
+        assert_eq!(Some(Amount::from_sat(0)), vec![].into_iter().checked_sum());
+        assert_eq!(Some(SignedAmount::from_sat(0)), vec![].into_iter().checked_sum());
+
+        let amounts = vec![Amount::from_sat(42), Amount::from_sat(1337), Amount::from_sat(21)];
+        let sum = amounts.into_iter().checked_sum();
+        assert_eq!(Some(Amount::from_sat(1400)), sum);
+
+        let amounts =
+            vec![Amount::from_sat(u64::max_value()), Amount::from_sat(1337), Amount::from_sat(21)];
+        let sum = amounts.into_iter().checked_sum();
+        assert_eq!(None, sum);
+
+        let amounts = vec![
+            SignedAmount::from_sat(i64::min_value()),
+            SignedAmount::from_sat(-1),
+            SignedAmount::from_sat(21),
+        ];
+        let sum = amounts.into_iter().checked_sum();
+        assert_eq!(None, sum);
+
+        let amounts = vec![
+            SignedAmount::from_sat(i64::max_value()),
+            SignedAmount::from_sat(1),
+            SignedAmount::from_sat(21),
+        ];
+        let sum = amounts.into_iter().checked_sum();
+        assert_eq!(None, sum);
+
+        let amounts = vec![
+            SignedAmount::from_sat(42),
+            SignedAmount::from_sat(3301),
+            SignedAmount::from_sat(21),
+        ];
+        let sum = amounts.into_iter().checked_sum();
+        assert_eq!(Some(SignedAmount::from_sat(3364)), sum);
+    }
+
+    #[test]
+    fn denomination_string_acceptable_forms() {
+        // Non-exhaustive list of valid forms.
+        let valid = vec![
+            "BTC", "btc", "mBTC", "mbtc", "uBTC", "ubtc", "SATOSHI", "satoshi", "SATOSHIS",
+            "satoshis", "SAT", "sat", "SATS", "sats", "bit", "bits", "nBTC", "pBTC",
+        ];
+        for denom in valid.iter() {
+            assert!(Denomination::from_str(denom).is_ok());
+        }
+    }
+
+    #[test]
+    fn disallow_confusing_forms() {
+        let confusing =
+            vec!["Msat", "Msats", "MSAT", "MSATS", "MSat", "MSats", "MBTC", "Mbtc", "PBTC"];
+        for denom in confusing.iter() {
+            match Denomination::from_str(denom) {
+                Ok(_) => panic!("from_str should error for {}", denom),
+                Err(ParseAmountError::PossiblyConfusingDenomination(_)) => {}
+                Err(e) => panic!("unexpected error: {}", e),
+            }
+        }
+    }
+
+    #[test]
+    fn disallow_unknown_denomination() {
+        // Non-exhaustive list of unknown forms.
+        let unknown = vec!["NBTC", "UBTC", "ABC", "abc", "cBtC", "Sat", "Sats"];
+        for denom in unknown.iter() {
+            match Denomination::from_str(denom) {
+                Ok(_) => panic!("from_str should error for {}", denom),
+                Err(ParseAmountError::UnknownDenomination(_)) => {}
+                Err(e) => panic!("unexpected error: {}", e),
+            }
+        }
+    }
+}
diff --git a/src/util/base58.rs b/dash/src/base58.rs
similarity index 81%
rename from src/util/base58.rs
rename to dash/src/base58.rs
index 0f0dee472..a785a5b8d 100644
--- a/src/util/base58.rs
+++ b/dash/src/base58.rs
@@ -21,14 +21,14 @@
 //! strings respectively.
 //!
 
-use prelude::*;
+use crate::prelude::*;
 
 use core::{fmt, str, iter, slice};
 
 use hashes::{sha256d, Hash, hex};
 use secp256k1;
 
-use util::{endian, key};
+use crate::key;
 
 /// An error that might occur during base58 decoding
 #[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone)]
@@ -70,7 +70,6 @@ impl fmt::Display for Error {
 }
 
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 impl ::std::error::Error for Error {}
 
 /// Vector-like object that holds the first 100 elements on the stack. If more space is needed it
@@ -132,7 +131,10 @@ static BASE58_DIGITS: [Option<u8>; 128] = [
 ];
 
 /// Decode base58-encoded string into a byte vector
-pub fn from(data: &str) -> Result<Vec<u8>, Error> {
+pub fn from(data: &str) -> Result<Vec<u8>, Error> { decode(data) }
+
+/// Decodes a base58-encoded string into a byte vector.
+pub fn decode(data: &str) -> Result<Vec<u8>, Error> {
     // 11/15 is just over log_256(58)
     let mut scratch = vec![0u8; 1 + data.len() * 11 / 15];
     // Build in base 256
@@ -143,7 +145,9 @@ pub fn from(data: &str) -> Result<Vec<u8>, Error> {
         }
         let mut carry = match BASE58_DIGITS[d58 as usize] {
             Some(d58) => d58 as u32,
-            None => { return Err(Error::BadByte(d58)); }
+            None => {
+                return Err(Error::BadByte(d58));
+            }
         };
         for d256 in scratch.iter_mut().rev() {
             carry += *d256 as u32 * 58;
@@ -154,28 +158,36 @@ pub fn from(data: &str) -> Result<Vec<u8>, Error> {
     }
 
     // Copy leading zeroes directly
-    let mut ret: Vec<u8> = data.bytes().take_while(|&x| x == BASE58_CHARS[0])
-                                       .map(|_| 0)
-                                       .collect();
+    let mut ret: Vec<u8> = data.bytes().take_while(|&x| x == BASE58_CHARS[0]).map(|_| 0).collect();
     // Copy rest of string
     ret.extend(scratch.into_iter().skip_while(|&x| x == 0));
     Ok(ret)
 }
 
-/// Decode a base58check-encoded string
-pub fn from_check(data: &str) -> Result<Vec<u8>, Error> {
-    let mut ret: Vec<u8> = from(data)?;
+/// Decodes a base58check-encoded string into a byte vector verifying the checksum.
+#[deprecated(since = "0.30.0", note = "Use base58::decode_check() instead")]
+pub fn from_check(data: &str) -> Result<Vec<u8>, Error> { decode_check(data) }
+
+/// Decodes a base58check-encoded string into a byte vector verifying the checksum.
+pub fn decode_check(data: &str) -> Result<Vec<u8>, Error> {
+    let mut ret: Vec<u8> = decode(data)?;
     if ret.len() < 4 {
         return Err(Error::TooShort(ret.len()));
     }
-    let ck_start = ret.len() - 4;
-    let expected = endian::slice_to_u32_le(&sha256d::Hash::hash(&ret[..ck_start])[..4]);
-    let actual = endian::slice_to_u32_le(&ret[ck_start..(ck_start + 4)]);
+    let check_start = ret.len() - 4;
+
+    let hash_check =
+        sha256d::Hash::hash(&ret[..check_start])[..4].try_into().expect("4 byte slice");
+    let data_check = ret[check_start..].try_into().expect("4 byte slice");
+
+    let expected = u32::from_le_bytes(hash_check);
+    let actual = u32::from_le_bytes(data_check);
+
     if expected != actual {
         return Err(Error::BadChecksum(expected, actual));
     }
 
-    ret.truncate(ck_start);
+    ret.truncate(check_start);
     Ok(ret)
 }
 
@@ -235,6 +247,14 @@ pub fn encode_slice(data: &[u8]) -> String {
     encode_iter(data.iter().cloned())
 }
 
+/// Encodes `data` as a base58 string including the checksum.
+///
+/// The checksum is the first four bytes of the sha256d of the data, concatenated onto the end.
+pub fn encode_check(data: &[u8]) -> String {
+    let checksum = sha256d::Hash::hash(data);
+    encode_iter(data.iter().cloned().chain(checksum[0..4].iter().cloned()))
+}
+
 /// Obtain a string with the base58check encoding of a slice
 /// (Tack the first 4 256-digits of the object's Bitcoin hash onto the end.)
 pub fn check_encode_slice(data: &[u8]) -> String {
@@ -246,13 +266,19 @@ pub fn check_encode_slice(data: &[u8]) -> String {
     )
 }
 
-/// Obtain a string with the base58check encoding of a slice
-/// (Tack the first 4 256-digits of the object's Bitcoin hash onto the end.)
+/// Encodes `data` as base58, including the checksum, into a formatter.
+///
+/// The checksum is the first four bytes of the sha256d of the data, concatenated onto the end.
+#[deprecated(since = "0.30.0", note = "Use base58::encode_check_to_fmt() instead")]
 pub fn check_encode_slice_to_fmt(fmt: &mut fmt::Formatter, data: &[u8]) -> fmt::Result {
+    encode_check_to_fmt(fmt, data)
+}
+/// Encodes a slice as base58, including the checksum, into a formatter.
+///
+/// The checksum is the first four bytes of the sha256d of the data, concatenated onto the end.
+pub fn encode_check_to_fmt(fmt: &mut fmt::Formatter, data: &[u8]) -> fmt::Result {
     let checksum = sha256d::Hash::hash(data);
-    let iter = data.iter()
-        .cloned()
-        .chain(checksum[0..4].iter().cloned());
+    let iter = data.iter().cloned().chain(checksum[0..4].iter().cloned());
     format_iter(fmt, iter)
 }
 
@@ -263,7 +289,8 @@ impl From<key::Error> for Error {
             key::Error::Secp256k1(e) => Error::Secp256k1(e),
             key::Error::Base58(e) => e,
             key::Error::InvalidKeyPrefix(_) => Error::Secp256k1(secp256k1::Error::InvalidPublicKey),
-            key::Error::Hex(e) => Error::Hex(e)
+            key::Error::Hex(e) => Error::Hex(e),
+            key::Error::InvalidHexLength(size) => Error::InvalidLength(size),
         }
     }
 }
@@ -311,7 +338,7 @@ mod tests {
         assert_eq!(from("111211").ok(), Some(vec![0u8, 0, 0, 13, 36]));
 
         // Addresses
-        assert_eq!(from_check("1PfJpZsjreyVrqeoAfabrRwwjQyoSQMmHH").ok(),
+        assert_eq!(decode_check("1PfJpZsjreyVrqeoAfabrRwwjQyoSQMmHH").ok(),
                    Some(Vec::from_hex("00f8917303bfa8ef24f292e8fa1419b20460ba064d").unwrap()));
         // Non Base58 char.
         assert_eq!(from("¢").unwrap_err(), Error::BadByte(194));
@@ -320,14 +347,14 @@ mod tests {
     #[test]
     fn test_base58_roundtrip() {
         let s = "xprv9wTYmMFdV23N2TdNG573QoEsfRrWKQgWeibmLntzniatZvR9BmLnvSxqu53Kw1UmYPxLgboyZQaXwTCg8MSY3H2EU4pWcQDnRnrVA1xe8fs";
-        let v: Vec<u8> = from_check(s).unwrap();
+        let v: Vec<u8> = decode_check(s).unwrap();
         assert_eq!(check_encode_slice(&v[..]), s);
-        assert_eq!(from_check(&check_encode_slice(&v[..])).ok(), Some(v));
+        assert_eq!(decode_check(&check_encode_slice(&v[..])).ok(), Some(v));
 
         // Check that empty slice passes roundtrip.
-        assert_eq!(from_check(&check_encode_slice(&[])), Ok(vec![]));
+        assert_eq!(decode_check(&check_encode_slice(&[])), Ok(vec![]));
         // Check that `len > 4` is enforced.
-        assert_eq!(from_check(&encode_slice(&[1,2,3])), Err(Error::TooShort(3)));
+        assert_eq!(decode_check(&encode_slice(&[1,2,3])), Err(Error::TooShort(3)));
 
     }
 }
diff --git a/src/util/bip143.rs b/dash/src/bip143.rs
similarity index 99%
rename from src/util/bip143.rs
rename to dash/src/bip143.rs
index d7ff535de..703a0e8e6 100644
--- a/src/util/bip143.rs
+++ b/dash/src/bip143.rs
@@ -30,7 +30,7 @@ use io;
 use core::ops::{Deref, DerefMut};
 use blockdata::transaction::special_transaction::TransactionPayload;
 use blockdata::transaction::txin::TxIn;
-use util::sighash;
+use sighash;
 
 /// Parts of a sighash which are common across inputs or signatures, and which are
 /// sufficient (in conjunction with a private key) to sign the transaction
@@ -170,7 +170,7 @@ impl<R: DerefMut<Target = Transaction>> SigHashCache<R> {
     ///
     /// ```
     /// use dashcore::blockdata::transaction::{Transaction, hash_type::EcdsaSighashType};
-    /// use dashcore::util::bip143::SigHashCache;
+    /// use dashcore::bip143::SigHashCache;
     /// use dashcore::Script;
     ///
     /// let mut tx_to_sign = Transaction { version: 2, lock_time: 0, input: Vec::new(), output: Vec::new(), special_transaction_payload: None };
@@ -198,8 +198,8 @@ mod tests {
     use blockdata::transaction::Transaction;
     use consensus::encode::deserialize;
     use network::constants::Network;
-    use util::address::Address;
-    use util::key::PublicKey;
+    use address::Address;
+    use key::PublicKey;
     use hashes::hex::FromHex;
 
     use super::*;
diff --git a/dash/src/bip152.rs b/dash/src/bip152.rs
new file mode 100644
index 000000000..f2818dc9f
--- /dev/null
+++ b/dash/src/bip152.rs
@@ -0,0 +1,500 @@
+// SPDX-License-Identifier: CC0-1.0
+
+//! BIP152 Compact Blocks
+//!
+//! Implementation of compact blocks data structure and algorithms.
+//!
+
+use core::convert::{TryFrom, TryInto};
+use core::{convert, fmt, mem};
+#[cfg(feature = "std")]
+use std::error;
+
+use hashes::{sha256, siphash24, Hash};
+use internals::impl_array_newtype;
+
+use crate::consensus::encode::{self, Decodable, Encodable, VarInt};
+use crate::internal_macros::{impl_bytes_newtype, impl_consensus_encoding};
+use crate::prelude::*;
+use crate::{block, io, Block, BlockHash, Transaction};
+
+/// A BIP-152 error
+#[derive(Clone, PartialEq, Eq, Debug, Copy, PartialOrd, Ord, Hash)]
+#[non_exhaustive]
+pub enum Error {
+    /// An unknown version number was used.
+    UnknownVersion,
+    /// The prefill slice provided was invalid.
+    InvalidPrefill,
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Error::UnknownVersion => write!(f, "an unknown version number was used"),
+            Error::InvalidPrefill => write!(f, "the prefill slice provided was invalid"),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match *self {
+            UnknownVersion | InvalidPrefill => None,
+        }
+    }
+}
+
+/// A [PrefilledTransaction] structure is used in [HeaderAndShortIds] to
+/// provide a list of a few transactions explicitly.
+#[derive(PartialEq, Eq, Clone, Debug, PartialOrd, Ord, Hash)]
+pub struct PrefilledTransaction {
+    /// The index of the transaction in the block.
+    ///
+    /// This field is differentially encoded relative to the previous
+    /// prefilled transaction as described as follows:
+    ///
+    /// > Several uses of CompactSize below are "differentially encoded". For
+    /// > these, instead of using raw indexes, the number encoded is the
+    /// > difference between the current index and the previous index, minus one.
+    /// > For example, a first index of 0 implies a real index of 0, a second
+    /// > index of 0 thereafter refers to a real index of 1, etc.
+    pub idx: u16,
+    /// The actual transaction.
+    pub tx: Transaction,
+}
+
+impl convert::AsRef<Transaction> for PrefilledTransaction {
+    fn as_ref(&self) -> &Transaction { &self.tx }
+}
+
+impl Encodable for PrefilledTransaction {
+    #[inline]
+    fn consensus_encode<S: io::Write + ?Sized>(&self, mut s: &mut S) -> Result<usize, io::Error> {
+        Ok(VarInt(self.idx as u64).consensus_encode(&mut s)? + self.tx.consensus_encode(&mut s)?)
+    }
+}
+
+impl Decodable for PrefilledTransaction {
+    #[inline]
+    fn consensus_decode<D: io::Read + ?Sized>(
+        mut d: &mut D,
+    ) -> Result<PrefilledTransaction, encode::Error> {
+        let idx = VarInt::consensus_decode(&mut d)?.0;
+        let idx = u16::try_from(idx)
+            .map_err(|_| encode::Error::ParseFailed("BIP152 prefilled tx index out of bounds"))?;
+        let tx = Transaction::consensus_decode(&mut d)?;
+        Ok(PrefilledTransaction { idx, tx })
+    }
+}
+
+/// Short transaction IDs are used to represent a transaction without sending a full 256-bit hash.
+#[derive(PartialEq, Eq, Clone, Copy, Hash, Default, PartialOrd, Ord)]
+pub struct ShortId([u8; 6]);
+impl_array_newtype!(ShortId, u8, 6);
+impl_bytes_newtype!(ShortId, 6);
+
+impl ShortId {
+    /// Calculate the SipHash24 keys used to calculate short IDs.
+    pub fn calculate_siphash_keys(header: &block::Header, nonce: u64) -> (u64, u64) {
+        // 1. single-SHA256 hashing the block header with the nonce appended (in little-endian)
+        let h = {
+            let mut engine = sha256::Hash::engine();
+            header.consensus_encode(&mut engine).expect("engines don't error");
+            nonce.consensus_encode(&mut engine).expect("engines don't error");
+            sha256::Hash::from_engine(engine)
+        };
+
+        // 2. Running SipHash-2-4 with the input being the transaction ID and the keys (k0/k1)
+        // set to the first two little-endian 64-bit integers from the above hash, respectively.
+        (
+            u64::from_le_bytes(h[0..8].try_into().expect("8 byte slice")),
+            u64::from_le_bytes(h[8..16].try_into().expect("8 byte slice")),
+        )
+    }
+
+    /// Calculate the short ID with the given (w)txid and using the provided SipHash keys.
+    pub fn with_siphash_keys<T: AsRef<[u8]>>(txid: &T, siphash_keys: (u64, u64)) -> ShortId {
+        // 2. Running SipHash-2-4 with the input being the transaction ID and the keys (k0/k1)
+        // set to the first two little-endian 64-bit integers from the above hash, respectively.
+        let hash = siphash24::Hash::hash_with_keys(siphash_keys.0, siphash_keys.1, txid.as_ref());
+
+        // 3. Dropping the 2 most significant bytes from the SipHash output to make it 6 bytes.
+        let mut id = ShortId([0; 6]);
+        id.0.copy_from_slice(&hash[0..6]);
+        id
+    }
+}
+
+impl Encodable for ShortId {
+    #[inline]
+    fn consensus_encode<S: io::Write + ?Sized>(&self, s: &mut S) -> Result<usize, io::Error> {
+        self.0.consensus_encode(s)
+    }
+}
+
+impl Decodable for ShortId {
+    #[inline]
+    fn consensus_decode<D: io::Read + ?Sized>(d: &mut D) -> Result<ShortId, encode::Error> {
+        Ok(ShortId(Decodable::consensus_decode(d)?))
+    }
+}
+
+/// A [HeaderAndShortIds] structure is used to relay a block header, the short
+/// transactions IDs used for matching already-available transactions, and a
+/// select few transactions which we expect a peer may be missing.
+#[derive(PartialEq, Eq, Clone, Debug, PartialOrd, Ord, Hash)]
+pub struct HeaderAndShortIds {
+    /// The header of the block being provided.
+    pub header: block::Header,
+    ///  A nonce for use in short transaction ID calculations.
+    pub nonce: u64,
+    ///  The short transaction IDs calculated from the transactions
+    ///  which were not provided explicitly in prefilled_txs.
+    pub short_ids: Vec<ShortId>,
+    ///  Used to provide the coinbase transaction and a select few
+    ///  which we expect a peer may be missing.
+    pub prefilled_txs: Vec<PrefilledTransaction>,
+}
+impl_consensus_encoding!(HeaderAndShortIds, header, nonce, short_ids, prefilled_txs);
+
+impl HeaderAndShortIds {
+    /// Create a new [HeaderAndShortIds] from a full block.
+    ///
+    /// The version number must be either 1 or 2.
+    ///
+    /// The `prefill` slice indicates which transactions should be prefilled in
+    /// the block. It should contain the indexes in the block of the txs to
+    /// prefill. It must be ordered. 0 should not be included as the
+    /// coinbase tx is always prefilled.
+    ///
+    /// > Nodes SHOULD NOT use the same nonce across multiple different blocks.
+    pub fn from_block(
+        block: &Block,
+        nonce: u64,
+        version: u32,
+        mut prefill: &[usize],
+    ) -> Result<HeaderAndShortIds, Error> {
+        if version != 1 && version != 2 {
+            return Err(Error::UnknownVersion);
+        }
+
+        let siphash_keys = ShortId::calculate_siphash_keys(&block.header, nonce);
+
+        let mut prefilled = Vec::with_capacity(prefill.len() + 1); // +1 for coinbase tx
+        let mut short_ids = Vec::with_capacity(block.txdata.len() - prefill.len());
+        let mut last_prefill = 0;
+        for (idx, tx) in block.txdata.iter().enumerate() {
+            // Check if we should prefill this tx.
+            let prefill_tx = if prefill.first() == Some(&idx) {
+                prefill = &prefill[1..];
+                true
+            } else {
+                idx == 0 // Always prefill coinbase.
+            };
+
+            if prefill_tx {
+                let diff_idx = idx - last_prefill;
+                last_prefill = idx + 1;
+                prefilled.push(PrefilledTransaction {
+                    idx: diff_idx as u16,
+                    tx: match version {
+                        // >  As encoded in "tx" messages sent in response to getdata MSG_TX
+                        1 => {
+                            // strip witness for version 1
+                            let mut no_witness = tx.clone();
+                            no_witness.input.iter_mut().for_each(|i| i.witness.clear());
+                            no_witness
+                        }
+                        // > Transactions inside cmpctblock messages (both those used as direct
+                        // > announcement and those in response to getdata) and in blocktxn should
+                        // > include witness data, using the same format as responses to getdata
+                        // > MSG_WITNESS_TX, specified in BIP144.
+                        2 => tx.clone(),
+                        _ => unreachable!(),
+                    },
+                });
+            } else {
+                short_ids.push(ShortId::with_siphash_keys(
+                    &match version {
+                        1 => tx.txid().to_raw_hash(),
+                        2 => tx.wtxid().to_raw_hash(),
+                        _ => unreachable!(),
+                    },
+                    siphash_keys,
+                ));
+            }
+        }
+
+        if !prefill.is_empty() {
+            return Err(Error::InvalidPrefill);
+        }
+
+        Ok(HeaderAndShortIds {
+            header: block.header,
+            nonce,
+            // Provide coinbase prefilled.
+            prefilled_txs: prefilled,
+            short_ids,
+        })
+    }
+}
+
+/// A [BlockTransactionsRequest] structure is used to list transaction indexes
+/// in a block being requested.
+#[derive(PartialEq, Eq, Clone, Debug, PartialOrd, Ord, Hash)]
+pub struct BlockTransactionsRequest {
+    ///  The blockhash of the block which the transactions being requested are in.
+    pub block_hash: BlockHash,
+    ///  The indexes of the transactions being requested in the block.
+    ///
+    ///  Warning: Encoding panics with [`u64::MAX`] values. See [`BlockTransactionsRequest::consensus_encode()`]
+    pub indexes: Vec<u64>,
+}
+
+impl Encodable for BlockTransactionsRequest {
+    /// # Panics
+    ///
+    /// Panics if the index overflows [`u64::MAX`]. This happens when [`BlockTransactionsRequest::indexes`]
+    /// contains an entry with the value [`u64::MAX`] as `u64` overflows during differential encoding.
+    fn consensus_encode<S: io::Write + ?Sized>(&self, mut s: &mut S) -> Result<usize, io::Error> {
+        let mut len = self.block_hash.consensus_encode(&mut s)?;
+        // Manually encode indexes because they are differentially encoded VarInts.
+        len += VarInt(self.indexes.len() as u64).consensus_encode(&mut s)?;
+        let mut last_idx = 0;
+        for idx in &self.indexes {
+            len += VarInt(*idx - last_idx).consensus_encode(&mut s)?;
+            last_idx = *idx + 1; // can panic here
+        }
+        Ok(len)
+    }
+}
+
+impl Decodable for BlockTransactionsRequest {
+    fn consensus_decode<D: io::Read + ?Sized>(
+        mut d: &mut D,
+    ) -> Result<BlockTransactionsRequest, encode::Error> {
+        Ok(BlockTransactionsRequest {
+            block_hash: BlockHash::consensus_decode(&mut d)?,
+            indexes: {
+                // Manually decode indexes because they are differentially encoded VarInts.
+                let nb_indexes = VarInt::consensus_decode(&mut d)?.0 as usize;
+
+                // Since the number of indices ultimately represent transactions,
+                // we can limit the number of indices to the maximum number of
+                // transactions that would be allowed in a vector.
+                let byte_size = (nb_indexes)
+                    .checked_mul(mem::size_of::<Transaction>())
+                    .ok_or(encode::Error::ParseFailed("Invalid length"))?;
+                if byte_size > encode::MAX_VEC_SIZE {
+                    return Err(encode::Error::OversizedVectorAllocation {
+                        requested: byte_size,
+                        max: encode::MAX_VEC_SIZE,
+                    });
+                }
+
+                let mut indexes = Vec::with_capacity(nb_indexes);
+                let mut last_index: u64 = 0;
+                for _ in 0..nb_indexes {
+                    let differential: VarInt = Decodable::consensus_decode(&mut d)?;
+                    last_index = match last_index.checked_add(differential.0) {
+                        Some(r) => r,
+                        None => return Err(encode::Error::ParseFailed("block index overflow")),
+                    };
+                    indexes.push(last_index);
+                    last_index = match last_index.checked_add(1) {
+                        Some(r) => r,
+                        None => return Err(encode::Error::ParseFailed("block index overflow")),
+                    };
+                }
+                indexes
+            },
+        })
+    }
+}
+
+/// A transaction index is requested that is out of range from the
+/// corresponding block.
+#[derive(Clone, PartialEq, Eq, Debug, Copy, PartialOrd, Ord, Hash)]
+pub struct TxIndexOutOfRangeError(u64);
+
+impl fmt::Display for TxIndexOutOfRangeError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "a transaction index is requested that is \
+            out of range from the corresponding block: {}",
+            self.0,
+        )
+    }
+}
+
+#[cfg(feature = "std")]
+impl error::Error for TxIndexOutOfRangeError {}
+
+/// A [BlockTransactions] structure is used to provide some of the transactions
+/// in a block, as requested.
+#[derive(PartialEq, Eq, Clone, Debug, PartialOrd, Ord, Hash)]
+pub struct BlockTransactions {
+    ///  The blockhash of the block which the transactions being provided are in.
+    pub block_hash: BlockHash,
+    ///  The transactions provided.
+    pub transactions: Vec<Transaction>,
+}
+impl_consensus_encoding!(BlockTransactions, block_hash, transactions);
+
+impl BlockTransactions {
+    /// Construct a [BlockTransactions] from a [BlockTransactionsRequest] and
+    /// the corresponsing full [Block] by providing all requested transactions.
+    pub fn from_request(
+        request: &BlockTransactionsRequest,
+        block: &Block,
+    ) -> Result<BlockTransactions, TxIndexOutOfRangeError> {
+        Ok(BlockTransactions {
+            block_hash: request.block_hash,
+            transactions: {
+                let mut txs = Vec::with_capacity(request.indexes.len());
+                for idx in &request.indexes {
+                    if *idx >= block.txdata.len() as u64 {
+                        return Err(TxIndexOutOfRangeError(*idx));
+                    }
+                    txs.push(block.txdata[*idx as usize].clone());
+                }
+                txs
+            },
+        })
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use hashes::hex::FromHex;
+    use crate::blockdata::script::ScriptBuf;
+    use crate::blockdata::transaction::{Transaction, txin::TxIn, txout::TxOut, outpoint::OutPoint};
+
+    use super::*;
+    use crate::blockdata::locktime::absolute;
+    use crate::consensus::encode::{deserialize, serialize};
+    use crate::hash_types::TxMerkleNode;
+    use crate::pow::CompactTarget;
+    use crate::blockdata::witness::Witness;
+    use crate::hash_types::{Txid};
+
+    fn dummy_tx(nonce: &[u8]) -> Transaction {
+        Transaction {
+            version: 1,
+            lock_time: absolute::LockTime::from_consensus(2).to_consensus_u32(),
+            input: vec![TxIn {
+                previous_output: OutPoint::new(Txid::hash(nonce), 0),
+                script_sig: ScriptBuf::new(),
+                sequence: 1,
+                witness: Witness::new(),
+            }],
+            output: vec![TxOut { value: 1, script_pubkey: ScriptBuf::new() }],
+            special_transaction_payload: None,
+        }
+    }
+
+    fn dummy_block() -> Block {
+        Block {
+            header: block::Header {
+                version: block::Version::ONE,
+                prev_blockhash: BlockHash::hash(&[0]),
+                merkle_root: TxMerkleNode::hash(&[1]),
+                time: 2,
+                bits: CompactTarget::from_consensus(3),
+                nonce: 4,
+            },
+            txdata: vec![dummy_tx(&[2]), dummy_tx(&[3]), dummy_tx(&[4])],
+        }
+    }
+
+    #[test]
+    fn test_header_and_short_ids_from_block() {
+        let block = dummy_block();
+
+        let compact = HeaderAndShortIds::from_block(&block, 42, 2, &[]).unwrap();
+        assert_eq!(compact.nonce, 42);
+        assert_eq!(compact.short_ids.len(), 2);
+        assert_eq!(compact.prefilled_txs.len(), 1);
+        assert_eq!(compact.prefilled_txs[0].idx, 0);
+        assert_eq!(&compact.prefilled_txs[0].tx, &block.txdata[0]);
+
+        let compact = HeaderAndShortIds::from_block(&block, 42, 2, &[0, 1, 2]).unwrap();
+        let idxs = compact.prefilled_txs.iter().map(|t| t.idx).collect::<Vec<_>>();
+        assert_eq!(idxs, vec![0, 0, 0]);
+
+        let compact = HeaderAndShortIds::from_block(&block, 42, 2, &[2]).unwrap();
+        let idxs = compact.prefilled_txs.iter().map(|t| t.idx).collect::<Vec<_>>();
+        assert_eq!(idxs, vec![0, 1]);
+    }
+
+    #[test]
+    fn test_compact_block_vector() {
+        // Tested with Elements implementation of compact blocks.
+        let raw_block = Vec::<u8>::from_hex("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").unwrap();
+        let raw_compact = Vec::<u8>::from_hex("000000206c750a364035aefd5f81508a08769975116d9195312ee4520dceac39e1fdc62c4dc67473b8e354358c1e610afeaff7410858bd45df43e2940f8a62bd3d5e3ac943c2975cffff7f2000000000a4df3c3744da89fa010a6979e971450100020000000001010000000000000000000000000000000000000000000000000000000000000000ffffffff04016b0101ffffffff020006062a0100000001510000000000000000266a24aa21a9ed4a3d9f3343dafcc0d6f6d4310f2ee5ce273ed34edca6c75db3a73e7f368734200120000000000000000000000000000000000000000000000000000000000000000000000000").unwrap();
+
+        let block: Block = deserialize(&raw_block).unwrap();
+        let nonce = 18053200567810711460;
+        let compact = HeaderAndShortIds::from_block(&block, nonce, 2, &[]).unwrap();
+        let compact_expected: HeaderAndShortIds = deserialize(&raw_compact).unwrap();
+
+        assert_eq!(compact, compact_expected);
+    }
+
+    #[test]
+    fn test_getblocktx_differential_encoding_de_and_serialization() {
+        let testcases = vec![
+            // differentially encoded VarInts, indicies
+            (vec![4, 0, 5, 1, 10], vec![0, 6, 8, 19]),
+            (vec![1, 0], vec![0]),
+            (vec![5, 0, 0, 0, 0, 0], vec![0, 1, 2, 3, 4]),
+            (vec![3, 1, 1, 1], vec![1, 3, 5]),
+            (vec![3, 0, 0, 253, 0, 1], vec![0, 1, 258]), // .., 253, 0, 1] == VarInt(256)
+        ];
+        let deser_errorcases = vec![
+            vec![2, 255, 254, 255, 255, 255, 255, 255, 255, 255, 0], // .., 255, 254, .., 255] == VarInt(u64::MAX-1)
+            vec![1, 255, 255, 255, 255, 255, 255, 255, 255, 255], // .., 255, 255, .., 255] == VarInt(u64::MAX)
+        ];
+        for testcase in testcases {
+            {
+                // test deserialization
+                let mut raw: Vec<u8> = [0u8; 32].to_vec();
+                raw.extend(testcase.0.clone());
+                let btr: BlockTransactionsRequest = deserialize(&raw.to_vec()).unwrap();
+                assert_eq!(testcase.1, btr.indexes);
+            }
+            {
+                // test serialization
+                let raw: Vec<u8> = serialize(&BlockTransactionsRequest {
+                    block_hash: Hash::all_zeros(),
+                    indexes: testcase.1,
+                });
+                let mut expected_raw: Vec<u8> = [0u8; 32].to_vec();
+                expected_raw.extend(testcase.0);
+                assert_eq!(expected_raw, raw);
+            }
+        }
+        for errorcase in deser_errorcases {
+            {
+                // test that we return Err() if deserialization fails (and don't panic)
+                let mut raw: Vec<u8> = [0u8; 32].to_vec();
+                raw.extend(errorcase);
+                assert!(deserialize::<BlockTransactionsRequest>(&raw.to_vec()).is_err());
+            }
+        }
+    }
+
+    #[test]
+    #[should_panic] // 'attempt to add with overflow' in consensus_encode()
+    fn test_getblocktx_panic_when_encoding_u64_max() {
+        serialize(&BlockTransactionsRequest {
+            block_hash: Hash::all_zeros(),
+            indexes: vec![core::u64::MAX],
+        });
+    }
+}
diff --git a/dash/src/bip158.rs b/dash/src/bip158.rs
new file mode 100644
index 000000000..df6665a75
--- /dev/null
+++ b/dash/src/bip158.rs
@@ -0,0 +1,735 @@
+// Written in 2019 by Tammas Blummer.
+// SPDX-License-Identifier: CC0-1.0
+
+// This module was largely copied from https://github.com/rust-bitcoin/murmel/blob/master/src/blockfilter.rs
+// on 11. June 2019 which is licensed under Apache, that file specifically
+// was written entirely by Tamas Blummer, who is re-licensing its contents here as CC0.
+
+//! BIP 158 Compact Block Filters for Light Clients.
+//!
+//! This module implements a structure for compact filters on block data, for
+//! use in the BIP 157 light client protocol. The filter construction proposed
+//! is an alternative to Bloom filters, as used in BIP 37, that minimizes filter
+//! size by using Golomb-Rice coding for compression.
+//!
+//! ### Relevant BIPS
+//!
+//! * [BIP 157 - Client Side Block Filtering](https://github.com/bitcoin/bips/blob/master/bip-0157.mediawiki)
+//! * [BIP 158 - Compact Block Filters for Light Clients](https://github.com/bitcoin/bips/blob/master/bip-0158.mediawiki)
+//!
+//! # Examples
+//!
+//! ```ignore
+//! fn get_script_for_coin(coin: &OutPoint) -> Result<ScriptBuf, BlockFilterError> {
+//!   // get utxo ...
+//! }
+//!
+//! // create a block filter for a block (server side)
+//! let filter = BlockFilter::new_script_filter(&block, get_script_for_coin)?;
+//!
+//! // or create a filter from known raw data
+//! let filter = BlockFilter::new(content);
+//!
+//! // read and evaluate a filter
+//!
+//! let query: Iterator<Item=ScriptBuf> = // .. some scripts you care about
+//! if filter.match_any(&block_hash, &mut query.map(|s| s.as_bytes())) {
+//!   // get this block
+//! }
+//!  ```
+//!
+
+use core::cmp::{self, Ordering};
+use core::convert::TryInto;
+use core::fmt::{self, Display, Formatter};
+
+use hashes::{siphash24, Hash};
+use internals::write_err;
+
+use crate::blockdata::block::Block;
+use crate::blockdata::script::Script;
+use crate::blockdata::transaction::OutPoint;
+use crate::consensus::encode::VarInt;
+use crate::consensus::{Decodable, Encodable};
+use crate::hash_types::{BlockHash, FilterHash, FilterHeader};
+use crate::io;
+use crate::prelude::*;
+
+/// Golomb encoding parameter as in BIP-158, see also https://gist.github.com/sipa/576d5f09c3b86c3b1b75598d799fc845
+const P: u8 = 19;
+const M: u64 = 784931;
+
+/// Errors for blockfilter.
+#[derive(Debug)]
+#[non_exhaustive]
+pub enum Error {
+    /// Missing UTXO, cannot calculate script filter.
+    UtxoMissing(OutPoint),
+    /// IO error reading or writing binary serialization of the filter.
+    Io(io::Error),
+}
+
+impl Display for Error {
+    fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
+        match *self {
+            Error::UtxoMissing(ref coin) => write!(f, "unresolved UTXO {}", coin),
+            Error::Io(ref e) => write_err!(f, "IO error"; e),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match self {
+            UtxoMissing(_) => None,
+            Io(e) => Some(e),
+        }
+    }
+}
+
+impl From<io::Error> for Error {
+    fn from(io: io::Error) -> Self { Error::Io(io) }
+}
+
+/// A block filter, as described by BIP 158.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct BlockFilter {
+    /// Golomb encoded filter
+    pub content: Vec<u8>,
+}
+
+impl FilterHash {
+    /// Computes the filter header from a filter hash and previous filter header.
+    pub fn filter_header(&self, previous_filter_header: &FilterHeader) -> FilterHeader {
+        let mut header_data = [0u8; 64];
+        header_data[0..32].copy_from_slice(&self[..]);
+        header_data[32..64].copy_from_slice(&previous_filter_header[..]);
+        FilterHeader::hash(&header_data)
+    }
+}
+
+impl BlockFilter {
+    /// Creates a new filter from pre-computed data.
+    pub fn new(content: &[u8]) -> BlockFilter { BlockFilter { content: content.to_vec() } }
+
+    /// Computes a SCRIPT_FILTER that contains spent and output scripts.
+    pub fn new_script_filter<M, S>(block: &Block, script_for_coin: M) -> Result<BlockFilter, Error>
+        where
+            M: Fn(&OutPoint) -> Result<S, Error>,
+            S: Borrow<Script>,
+    {
+        let mut out = Vec::new();
+        let mut writer = BlockFilterWriter::new(&mut out, block);
+
+        writer.add_output_scripts();
+        writer.add_input_scripts(script_for_coin)?;
+        writer.finish()?;
+
+        Ok(BlockFilter { content: out })
+    }
+
+    /// Computes this filter's ID in a chain of filters (see [BIP 157]).
+    ///
+    /// [BIP 157]: <https://github.com/bitcoin/bips/blob/master/bip-0157.mediawiki#Filter_Headers>
+    pub fn filter_header(&self, previous_filter_header: &FilterHeader) -> FilterHeader {
+        let filter_hash = FilterHash::hash(self.content.as_slice());
+        filter_hash.filter_header(previous_filter_header)
+    }
+
+    /// Returns true if any query matches against this [`BlockFilter`].
+    pub fn match_any<I>(&self, block_hash: &BlockHash, query: I) -> Result<bool, Error>
+        where
+            I: Iterator,
+            I::Item: Borrow<[u8]>,
+    {
+        let filter_reader = BlockFilterReader::new(block_hash);
+        filter_reader.match_any(&mut self.content.as_slice(), query)
+    }
+
+    /// Returns true if all queries match against this [`BlockFilter`].
+    pub fn match_all<I>(&self, block_hash: &BlockHash, query: I) -> Result<bool, Error>
+        where
+            I: Iterator,
+            I::Item: Borrow<[u8]>,
+    {
+        let filter_reader = BlockFilterReader::new(block_hash);
+        filter_reader.match_all(&mut self.content.as_slice(), query)
+    }
+}
+
+/// Compiles and writes a block filter.
+pub struct BlockFilterWriter<'a, W> {
+    block: &'a Block,
+    writer: GcsFilterWriter<'a, W>,
+}
+
+impl<'a, W: io::Write> BlockFilterWriter<'a, W> {
+    /// Creates a new [`BlockFilterWriter`] from `block`.
+    pub fn new(writer: &'a mut W, block: &'a Block) -> BlockFilterWriter<'a, W> {
+        let block_hash_as_int = block.block_hash().to_byte_array();
+        let k0 = u64::from_le_bytes(block_hash_as_int[0..8].try_into().expect("8 byte slice"));
+        let k1 = u64::from_le_bytes(block_hash_as_int[8..16].try_into().expect("8 byte slice"));
+        let writer = GcsFilterWriter::new(writer, k0, k1, M, P);
+        BlockFilterWriter { block, writer }
+    }
+
+    /// Adds output scripts of the block to filter (excluding OP_RETURN scripts).
+    pub fn add_output_scripts(&mut self) {
+        for transaction in &self.block.txdata {
+            for output in &transaction.output {
+                if !output.script_pubkey.is_op_return() {
+                    self.add_element(output.script_pubkey.as_bytes());
+                }
+            }
+        }
+    }
+
+    /// Adds consumed output scripts of a block to filter.
+    pub fn add_input_scripts<M, S>(&mut self, script_for_coin: M) -> Result<(), Error>
+        where
+            M: Fn(&OutPoint) -> Result<S, Error>,
+            S: Borrow<Script>,
+    {
+        for script in self
+            .block
+            .txdata
+            .iter()
+            .skip(1) // skip coinbase
+            .flat_map(|t| t.input.iter().map(|i| &i.previous_output))
+            .map(script_for_coin)
+        {
+            match script {
+                Ok(script) => self.add_element(script.borrow().as_bytes()),
+                Err(e) => return Err(e),
+            }
+        }
+        Ok(())
+    }
+
+    /// Adds an arbitrary element to filter.
+    pub fn add_element(&mut self, data: &[u8]) { self.writer.add_element(data); }
+
+    /// Writes the block filter.
+    pub fn finish(&mut self) -> Result<usize, io::Error> { self.writer.finish() }
+}
+
+/// Reads and interprets a block filter.
+pub struct BlockFilterReader {
+    reader: GcsFilterReader,
+}
+
+impl BlockFilterReader {
+    /// Creates a new [`BlockFilterReader`] from `block_hash`.
+    pub fn new(block_hash: &BlockHash) -> BlockFilterReader {
+        let block_hash_as_int = block_hash.to_byte_array();
+        let k0 = u64::from_le_bytes(block_hash_as_int[0..8].try_into().expect("8 byte slice"));
+        let k1 = u64::from_le_bytes(block_hash_as_int[8..16].try_into().expect("8 byte slice"));
+        BlockFilterReader { reader: GcsFilterReader::new(k0, k1, M, P) }
+    }
+
+    /// Returns true if any query matches against this [`BlockFilterReader`].
+    pub fn match_any<I, R>(&self, reader: &mut R, query: I) -> Result<bool, Error>
+        where
+            I: Iterator,
+            I::Item: Borrow<[u8]>,
+            R: io::Read + ?Sized,
+    {
+        self.reader.match_any(reader, query)
+    }
+
+    /// Returns true if all queries match against this [`BlockFilterReader`].
+    pub fn match_all<I, R>(&self, reader: &mut R, query: I) -> Result<bool, Error>
+        where
+            I: Iterator,
+            I::Item: Borrow<[u8]>,
+            R: io::Read + ?Sized,
+    {
+        self.reader.match_all(reader, query)
+    }
+}
+
+/// Golomb-Rice encoded filter reader.
+pub struct GcsFilterReader {
+    filter: GcsFilter,
+    m: u64,
+}
+
+impl GcsFilterReader {
+    /// Creates a new [`GcsFilterReader`] with specific seed to siphash.
+    pub fn new(k0: u64, k1: u64, m: u64, p: u8) -> GcsFilterReader {
+        GcsFilterReader { filter: GcsFilter::new(k0, k1, p), m }
+    }
+
+    /// Returns true if any query matches against this [`GcsFilterReader`].
+    pub fn match_any<I, R>(&self, reader: &mut R, query: I) -> Result<bool, Error>
+        where
+            I: Iterator,
+            I::Item: Borrow<[u8]>,
+            R: io::Read + ?Sized,
+    {
+        let mut decoder = reader;
+        let n_elements: VarInt = Decodable::consensus_decode(&mut decoder).unwrap_or(VarInt(0));
+        let reader = &mut decoder;
+        // map hashes to [0, n_elements << grp]
+        let nm = n_elements.0 * self.m;
+        let mut mapped =
+            query.map(|e| map_to_range(self.filter.hash(e.borrow()), nm)).collect::<Vec<_>>();
+        // sort
+        mapped.sort_unstable();
+        if mapped.is_empty() {
+            return Ok(true);
+        }
+        if n_elements.0 == 0 {
+            return Ok(false);
+        }
+
+        // find first match in two sorted arrays in one read pass
+        let mut reader = BitStreamReader::new(reader);
+        let mut data = self.filter.golomb_rice_decode(&mut reader)?;
+        let mut remaining = n_elements.0 - 1;
+        for p in mapped {
+            loop {
+                match data.cmp(&p) {
+                    Ordering::Equal => return Ok(true),
+                    Ordering::Less =>
+                        if remaining > 0 {
+                            data += self.filter.golomb_rice_decode(&mut reader)?;
+                            remaining -= 1;
+                        } else {
+                            return Ok(false);
+                        },
+                    Ordering::Greater => break,
+                }
+            }
+        }
+        Ok(false)
+    }
+
+    /// Returns true if all queries match against this [`GcsFilterReader`].
+    pub fn match_all<I, R>(&self, reader: &mut R, query: I) -> Result<bool, Error>
+        where
+            I: Iterator,
+            I::Item: Borrow<[u8]>,
+            R: io::Read + ?Sized,
+    {
+        let mut decoder = reader;
+        let n_elements: VarInt = Decodable::consensus_decode(&mut decoder).unwrap_or(VarInt(0));
+        let reader = &mut decoder;
+        // map hashes to [0, n_elements << grp]
+        let nm = n_elements.0 * self.m;
+        let mut mapped =
+            query.map(|e| map_to_range(self.filter.hash(e.borrow()), nm)).collect::<Vec<_>>();
+        // sort
+        mapped.sort_unstable();
+        mapped.dedup();
+        if mapped.is_empty() {
+            return Ok(true);
+        }
+        if n_elements.0 == 0 {
+            return Ok(false);
+        }
+
+        // figure if all mapped are there in one read pass
+        let mut reader = BitStreamReader::new(reader);
+        let mut data = self.filter.golomb_rice_decode(&mut reader)?;
+        let mut remaining = n_elements.0 - 1;
+        for p in mapped {
+            loop {
+                match data.cmp(&p) {
+                    Ordering::Equal => break,
+                    Ordering::Less =>
+                        if remaining > 0 {
+                            data += self.filter.golomb_rice_decode(&mut reader)?;
+                            remaining -= 1;
+                        } else {
+                            return Ok(false);
+                        },
+                    Ordering::Greater => return Ok(false),
+                }
+            }
+        }
+        Ok(true)
+    }
+}
+
+/// Fast reduction of hash to [0, nm) range.
+fn map_to_range(hash: u64, nm: u64) -> u64 { ((hash as u128 * nm as u128) >> 64) as u64 }
+
+/// Golomb-Rice encoded filter writer.
+pub struct GcsFilterWriter<'a, W> {
+    filter: GcsFilter,
+    writer: &'a mut W,
+    elements: BTreeSet<Vec<u8>>,
+    m: u64,
+}
+
+impl<'a, W: io::Write> GcsFilterWriter<'a, W> {
+    /// Creates a new [`GcsFilterWriter`] wrapping a generic writer, with specific seed to siphash.
+    pub fn new(writer: &'a mut W, k0: u64, k1: u64, m: u64, p: u8) -> GcsFilterWriter<'a, W> {
+        GcsFilterWriter { filter: GcsFilter::new(k0, k1, p), writer, elements: BTreeSet::new(), m }
+    }
+
+    /// Adds data to the filter.
+    pub fn add_element(&mut self, element: &[u8]) {
+        if !element.is_empty() {
+            self.elements.insert(element.to_vec());
+        }
+    }
+
+    /// Writes the filter to the wrapped writer.
+    pub fn finish(&mut self) -> Result<usize, io::Error> {
+        let nm = self.elements.len() as u64 * self.m;
+
+        // map hashes to [0, n_elements * M)
+        let mut mapped: Vec<_> = self
+            .elements
+            .iter()
+            .map(|e| map_to_range(self.filter.hash(e.as_slice()), nm))
+            .collect();
+        mapped.sort_unstable();
+
+        // write number of elements as varint
+        let mut wrote = VarInt(mapped.len() as u64).consensus_encode(&mut self.writer)?;
+
+        // write out deltas of sorted values into a Golonb-Rice coded bit stream
+        let mut writer = BitStreamWriter::new(self.writer);
+        let mut last = 0;
+        for data in mapped {
+            wrote += self.filter.golomb_rice_encode(&mut writer, data - last)?;
+            last = data;
+        }
+        wrote += writer.flush()?;
+        Ok(wrote)
+    }
+}
+
+/// Golomb Coded Set Filter.
+struct GcsFilter {
+    k0: u64, // sip hash key
+    k1: u64, // sip hash key
+    p: u8,
+}
+
+impl GcsFilter {
+    /// Creates a new [`GcsFilter`].
+    fn new(k0: u64, k1: u64, p: u8) -> GcsFilter { GcsFilter { k0, k1, p } }
+
+    /// Golomb-Rice encodes a number `n` to a bit stream (parameter 2^k).
+    fn golomb_rice_encode<W>(
+        &self,
+        writer: &mut BitStreamWriter<'_, W>,
+        n: u64,
+    ) -> Result<usize, io::Error>
+        where
+            W: io::Write,
+    {
+        let mut wrote = 0;
+        let mut q = n >> self.p;
+        while q > 0 {
+            let nbits = cmp::min(q, 64);
+            wrote += writer.write(!0u64, nbits as u8)?;
+            q -= nbits;
+        }
+        wrote += writer.write(0, 1)?;
+        wrote += writer.write(n, self.p)?;
+        Ok(wrote)
+    }
+
+    /// Golomb-Rice decodes a number from a bit stream (parameter 2^k).
+    fn golomb_rice_decode<R>(&self, reader: &mut BitStreamReader<R>) -> Result<u64, io::Error>
+        where
+            R: io::Read,
+    {
+        let mut q = 0u64;
+        while reader.read(1)? == 1 {
+            q += 1;
+        }
+        let r = reader.read(self.p)?;
+        Ok((q << self.p) + r)
+    }
+
+    /// Hashes an arbitrary slice with siphash using parameters of this filter.
+    fn hash(&self, element: &[u8]) -> u64 {
+        siphash24::Hash::hash_to_u64_with_keys(self.k0, self.k1, element)
+    }
+}
+
+/// Bitwise stream reader.
+pub struct BitStreamReader<'a, R> {
+    buffer: [u8; 1],
+    offset: u8,
+    reader: &'a mut R,
+}
+
+impl<'a, R: io::Read> BitStreamReader<'a, R> {
+    /// Creates a new [`BitStreamReader`] that reads bitwise from a given `reader`.
+    pub fn new(reader: &'a mut R) -> BitStreamReader<'a, R> {
+        BitStreamReader { buffer: [0u8], reader, offset: 8 }
+    }
+
+    /// Reads nbit bits, returning the bits in a `u64` starting with the rightmost bit.
+    ///
+    /// # Examples
+    /// ```
+    /// # use dashcore::bip158::BitStreamReader;
+    /// # let data = vec![0xff];
+    /// # let mut input = data.as_slice();
+    /// let mut reader = BitStreamReader::new(&mut input); // input contains all 1's
+    /// let res = reader.read(1).expect("read failed");
+    /// assert_eq!(res, 1_u64);
+    /// ```
+    pub fn read(&mut self, mut nbits: u8) -> Result<u64, io::Error> {
+        if nbits > 64 {
+            return Err(io::Error::new(
+                io::ErrorKind::Other,
+                "can not read more than 64 bits at once",
+            ));
+        }
+        let mut data = 0u64;
+        while nbits > 0 {
+            if self.offset == 8 {
+                self.reader.read_exact(&mut self.buffer)?;
+                self.offset = 0;
+            }
+            let bits = cmp::min(8 - self.offset, nbits);
+            data <<= bits;
+            data |= ((self.buffer[0] << self.offset) >> (8 - bits)) as u64;
+            self.offset += bits;
+            nbits -= bits;
+        }
+        Ok(data)
+    }
+}
+
+/// Bitwise stream writer.
+pub struct BitStreamWriter<'a, W> {
+    buffer: [u8; 1],
+    offset: u8,
+    writer: &'a mut W,
+}
+
+impl<'a, W: io::Write> BitStreamWriter<'a, W> {
+    /// Creates a new [`BitStreamWriter`] that writes bitwise to a given `writer`.
+    pub fn new(writer: &'a mut W) -> BitStreamWriter<'a, W> {
+        BitStreamWriter { buffer: [0u8], writer, offset: 0 }
+    }
+
+    /// Writes nbits bits from data.
+    pub fn write(&mut self, data: u64, mut nbits: u8) -> Result<usize, io::Error> {
+        if nbits > 64 {
+            return Err(io::Error::new(
+                io::ErrorKind::Other,
+                "can not write more than 64 bits at once",
+            ));
+        }
+        let mut wrote = 0;
+        while nbits > 0 {
+            let bits = cmp::min(8 - self.offset, nbits);
+            self.buffer[0] |= ((data << (64 - nbits)) >> (64 - 8 + self.offset)) as u8;
+            self.offset += bits;
+            nbits -= bits;
+            if self.offset == 8 {
+                wrote += self.flush()?;
+            }
+        }
+        Ok(wrote)
+    }
+
+    /// flush bits not yet written.
+    pub fn flush(&mut self) -> Result<usize, io::Error> {
+        if self.offset > 0 {
+            self.writer.write_all(&self.buffer)?;
+            self.buffer[0] = 0u8;
+            self.offset = 0;
+            Ok(1)
+        } else {
+            Ok(0)
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use std::collections::HashMap;
+
+    use serde_json::Value;
+
+    use super::*;
+    use crate::consensus::encode::deserialize;
+    use crate::hash_types::BlockHash;
+    use crate::internal_macros::hex;
+    use crate::ScriptBuf;
+
+    #[ignore]
+    #[test]
+    fn test_blockfilters() {
+        // test vectors from: https://github.com/jimpo/bitcoin/blob/c7efb652f3543b001b4dd22186a354605b14f47e/src/test/data/blockfilters.json
+        let data = include_str!("../tests/data/blockfilters.json");
+
+        let testdata = serde_json::from_str::<Value>(data).unwrap().as_array().unwrap().clone();
+        for t in testdata.iter().skip(1) {
+            let block_hash = t.get(1).unwrap().as_str().unwrap().parse::<BlockHash>().unwrap();
+            let block: Block = deserialize(&hex!(t.get(2).unwrap().as_str().unwrap())).unwrap();
+            assert_eq!(block.block_hash(), block_hash);
+            let scripts = t.get(3).unwrap().as_array().unwrap();
+            let previous_filter_header =
+                t.get(4).unwrap().as_str().unwrap().parse::<FilterHeader>().unwrap();
+            let filter_content = hex!(t.get(5).unwrap().as_str().unwrap());
+            let filter_header =
+                t.get(6).unwrap().as_str().unwrap().parse::<FilterHeader>().unwrap();
+
+            let mut txmap = HashMap::new();
+            let mut si = scripts.iter();
+            for tx in block.txdata.iter().skip(1) {
+                for input in tx.input.iter() {
+                    txmap.insert(
+                        input.previous_output,
+                        ScriptBuf::from(hex!(si.next().unwrap().as_str().unwrap())),
+                    );
+                }
+            }
+
+            let filter = BlockFilter::new_script_filter(&block, |o| {
+                if let Some(s) = txmap.get(o) {
+                    Ok(s.clone())
+                } else {
+                    Err(Error::UtxoMissing(*o))
+                }
+            })
+                .unwrap();
+
+            let test_filter = BlockFilter::new(filter_content.as_slice());
+
+            assert_eq!(test_filter.content, filter.content);
+
+            let block_hash = &block.block_hash();
+            assert!(filter
+                .match_all(
+                    block_hash,
+                    &mut txmap.iter().filter_map(|(_, s)| if !s.is_empty() {
+                        Some(s.as_bytes())
+                    } else {
+                        None
+                    })
+                )
+                .unwrap());
+
+            for script in txmap.values() {
+                let query = vec![script];
+                if !script.is_empty() {
+                    assert!(filter
+                        .match_any(block_hash, &mut query.iter().map(|s| s.as_bytes()))
+                        .unwrap());
+                }
+            }
+
+            assert_eq!(filter_header, filter.filter_header(&previous_filter_header));
+        }
+    }
+
+    #[test]
+    fn test_filter() {
+        let mut patterns = BTreeSet::new();
+
+        patterns.insert(hex!("000000"));
+        patterns.insert(hex!("111111"));
+        patterns.insert(hex!("222222"));
+        patterns.insert(hex!("333333"));
+        patterns.insert(hex!("444444"));
+        patterns.insert(hex!("555555"));
+        patterns.insert(hex!("666666"));
+        patterns.insert(hex!("777777"));
+        patterns.insert(hex!("888888"));
+        patterns.insert(hex!("999999"));
+        patterns.insert(hex!("aaaaaa"));
+        patterns.insert(hex!("bbbbbb"));
+        patterns.insert(hex!("cccccc"));
+        patterns.insert(hex!("dddddd"));
+        patterns.insert(hex!("eeeeee"));
+        patterns.insert(hex!("ffffff"));
+
+        let mut out = Vec::new();
+        {
+            let mut writer = GcsFilterWriter::new(&mut out, 0, 0, M, P);
+            for p in &patterns {
+                writer.add_element(p.as_slice());
+            }
+            writer.finish().unwrap();
+        }
+
+        let bytes = out;
+
+        {
+            let query = vec![hex!("abcdef"), hex!("eeeeee")];
+            let reader = GcsFilterReader::new(0, 0, M, P);
+            assert!(reader
+                .match_any(&mut bytes.as_slice(), &mut query.iter().map(|v| v.as_slice()))
+                .unwrap());
+        }
+        {
+            let query = vec![hex!("abcdef"), hex!("123456")];
+            let reader = GcsFilterReader::new(0, 0, M, P);
+            assert!(!reader
+                .match_any(&mut bytes.as_slice(), &mut query.iter().map(|v| v.as_slice()))
+                .unwrap());
+        }
+        {
+            let reader = GcsFilterReader::new(0, 0, M, P);
+            let mut query = Vec::new();
+            for p in &patterns {
+                query.push(p.clone());
+            }
+            assert!(reader
+                .match_all(&mut bytes.as_slice(), &mut query.iter().map(|v| v.as_slice()))
+                .unwrap());
+        }
+        {
+            let reader = GcsFilterReader::new(0, 0, M, P);
+            let mut query = Vec::new();
+            for p in &patterns {
+                query.push(p.clone());
+            }
+            query.push(hex!("abcdef"));
+            assert!(!reader
+                .match_all(&mut bytes.as_slice(), &mut query.iter().map(|v| v.as_slice()))
+                .unwrap());
+        }
+    }
+
+    #[test]
+    fn test_bit_stream() {
+        let mut out = Vec::new();
+        {
+            let mut writer = BitStreamWriter::new(&mut out);
+            writer.write(0, 1).unwrap(); // 0
+            writer.write(2, 2).unwrap(); // 10
+            writer.write(6, 3).unwrap(); // 110
+            writer.write(11, 4).unwrap(); // 1011
+            writer.write(1, 5).unwrap(); // 00001
+            writer.write(32, 6).unwrap(); // 100000
+            writer.write(7, 7).unwrap(); // 0000111
+            writer.flush().unwrap();
+        }
+        let bytes = out;
+        assert_eq!(
+            "01011010110000110000000001110000",
+            format!("{:08b}{:08b}{:08b}{:08b}", bytes[0], bytes[1], bytes[2], bytes[3])
+        );
+        {
+            let mut input = bytes.as_slice();
+            let mut reader = BitStreamReader::new(&mut input);
+            assert_eq!(reader.read(1).unwrap(), 0);
+            assert_eq!(reader.read(2).unwrap(), 2);
+            assert_eq!(reader.read(3).unwrap(), 6);
+            assert_eq!(reader.read(4).unwrap(), 11);
+            assert_eq!(reader.read(5).unwrap(), 1);
+            assert_eq!(reader.read(6).unwrap(), 32);
+            assert_eq!(reader.read(7).unwrap(), 7);
+            // 4 bits remained
+            assert!(reader.read(5).is_err());
+        }
+    }
+}
diff --git a/src/util/bip32.rs b/dash/src/bip32.rs
similarity index 88%
rename from src/util/bip32.rs
rename to dash/src/bip32.rs
index 08932cb7c..bb31a4229 100644
--- a/src/util/bip32.rs
+++ b/dash/src/bip32.rs
@@ -21,21 +21,23 @@
 //! at <https://github.com/Dash/bips/blob/master/bip-0032.mediawiki>.
 //!
 
-use prelude::*;
+use crate::prelude::*;
 
-use io::Write;
 use core::{fmt, str::FromStr, default::Default};
 use core::ops::Index;
 #[cfg(feature = "std")] use std::error;
 #[cfg(feature = "serde")] use serde;
 
-use hash_types::XpubIdentifier;
+use crate::hash_types::XpubIdentifier;
 use hashes::{sha512, Hash, HashEngine, Hmac, HmacEngine, hex};
 use secp256k1::{self, Secp256k1, XOnlyPublicKey};
 
-use network::constants::Network;
-use util::{base58, endian, key};
-use util::key::{PublicKey, PrivateKey, KeyPair};
+use crate::network::constants::Network;
+use crate::base58;
+use crate::crypto::key::{self, KeyPair, PrivateKey, PublicKey};
+use crate::internal_macros::impl_bytes_newtype;
+use internals::{impl_array_newtype};
+use crate::io::Write;
 
 /// A chain code
 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
@@ -43,6 +45,12 @@ pub struct ChainCode([u8; 32]);
 impl_array_newtype!(ChainCode, u8, 32);
 impl_bytes_newtype!(ChainCode, 32);
 
+impl ChainCode {
+    fn from_hmac(hmac: Hmac<sha512::Hash>) -> Self {
+        hmac[32..].try_into().expect("half of hmac is guaranteed to be 32 bytes")
+    }
+}
+
 /// A fingerprint
 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Default)]
 pub struct Fingerprint([u8; 4]);
@@ -66,7 +74,8 @@ pub struct ExtendedPrivKey {
     /// Chain code
     pub chain_code: ChainCode
 }
-serde_string_impl!(ExtendedPrivKey, "a BIP-32 extended private key");
+#[cfg(feature = "serde")]
+crate::serde_utils::serde_string_impl!(ExtendedPrivKey, "a BIP-32 extended private key");
 
 #[cfg(not(feature = "std"))]
 #[cfg_attr(docsrs, doc(cfg(not(feature = "std"))))]
@@ -98,7 +107,8 @@ pub struct ExtendedPubKey {
     /// Chain code
     pub chain_code: ChainCode
 }
-serde_string_impl!(ExtendedPubKey, "a BIP-32 extended public key");
+#[cfg(feature = "serde")]
+crate::serde_utils::serde_string_impl!(ExtendedPubKey, "a BIP-32 extended public key");
 
 /// A child number for a derived key
 #[derive(Copy, Clone, PartialEq, Eq, Debug, PartialOrd, Ord, Hash)]
@@ -212,7 +222,6 @@ impl FromStr for ChildNumber {
 }
 
 #[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
 impl<'de> serde::Deserialize<'de> for ChildNumber {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
     where
@@ -223,7 +232,6 @@ impl<'de> serde::Deserialize<'de> for ChildNumber {
 }
 
 #[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
 impl serde::Serialize for ChildNumber {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where
@@ -243,7 +251,9 @@ pub trait IntoDerivationPath {
 /// A BIP-32 derivation path.
 #[derive(Clone, PartialEq, Eq, Ord, PartialOrd, Hash)]
 pub struct DerivationPath(Vec<ChildNumber>);
-serde_string_impl!(DerivationPath, "a BIP-32 derivation path");
+
+#[cfg(feature = "serde")]
+crate::serde_utils::serde_string_impl!(DerivationPath, "a BIP-32 derivation path");
 
 impl<I> Index<I> for DerivationPath
 where
@@ -418,7 +428,7 @@ impl DerivationPath {
     /// Concatenate `self` with `path` and return the resulting new path.
     ///
     /// ```
-    /// use dashcore::util::bip32::{DerivationPath, ChildNumber};
+    /// use dashcore::bip32::{DerivationPath, ChildNumber};
     /// use std::str::FromStr;
     ///
     /// let base = DerivationPath::from_str("m/42").unwrap();
@@ -479,7 +489,9 @@ pub enum Error {
     /// Base58 encoding error
     Base58(base58::Error),
     /// Hexadecimal decoding error
-    Hex(hex::Error)
+    Hex(hex::Error),
+    /// `PublicKey` hex should be 66 or 130 digits long.
+    InvalidPublicKeyHexLength(usize),
 }
 
 impl fmt::Display for Error {
@@ -493,13 +505,14 @@ impl fmt::Display for Error {
             Error::UnknownVersion(ref bytes) => write!(f, "unknown version magic bytes: {:?}", bytes),
             Error::WrongExtendedKeyLength(ref len) => write!(f, "encoded extended key data has wrong length {}", len),
             Error::Base58(ref err) => write!(f, "base58 encoding error: {}", err),
-            Error::Hex(ref e) => write!(f, "Hexadecimal decoding error: {}", e)
+            Error::Hex(ref e) => write!(f, "Hexadecimal decoding error: {}", e),
+            Error::InvalidPublicKeyHexLength(got) =>
+                write!(f, "PublicKey hex should be 66 or 130 digits long, got: {}", got),
         }
     }
 }
 
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 impl error::Error for Error {
     fn cause(&self) -> Option<&dyn error::Error> {
         if let Error::Secp256k1(ref e) = *self {
@@ -516,7 +529,8 @@ impl From<key::Error> for Error {
             key::Error::Base58(e) => Error::Base58(e),
             key::Error::Secp256k1(e) => Error::Secp256k1(e),
             key::Error::InvalidKeyPrefix(_) => Error::Secp256k1(secp256k1::Error::InvalidPublicKey),
-            key::Error::Hex(e) => Error::Hex(e)
+            key::Error::Hex(e) => Error::Hex(e),
+            key::Error::InvalidHexLength(got) => Error::InvalidPublicKeyHexLength(got),
         }
     }
 }
@@ -544,7 +558,7 @@ impl ExtendedPrivKey {
             parent_fingerprint: Default::default(),
             child_number: ChildNumber::from_normal_idx(0)?,
             private_key: secp256k1::SecretKey::from_slice(&hmac_result[..32])?,
-            chain_code: ChainCode::from(&hmac_result[32..]),
+            chain_code: ChainCode::from_hmac(hmac_result),
         })
     }
 
@@ -579,12 +593,19 @@ impl ExtendedPrivKey {
     }
 
     /// Private->Private child key derivation
-    pub fn ckd_priv<C: secp256k1::Signing>(&self, secp: &Secp256k1<C>, i: ChildNumber) -> Result<ExtendedPrivKey, Error> {
+    /// Private->Private child key derivation
+    pub fn ckd_priv<C: secp256k1::Signing>(
+        &self,
+        secp: &Secp256k1<C>,
+        i: ChildNumber,
+    ) -> Result<ExtendedPrivKey, Error> {
         let mut hmac_engine: HmacEngine<sha512::Hash> = HmacEngine::new(&self.chain_code[..]);
         match i {
             ChildNumber::Normal { .. } => {
                 // Non-hardened key: compute public data and use that
-                hmac_engine.input(&secp256k1::PublicKey::from_secret_key(secp, &self.private_key).serialize()[..]);
+                hmac_engine.input(
+                    &secp256k1::PublicKey::from_secret_key(secp, &self.private_key).serialize()[..],
+                );
             }
             ChildNumber::Hardened { .. } => {
                 // Hardened key: use only secret data to prevent public derivation
@@ -593,10 +614,12 @@ impl ExtendedPrivKey {
             }
         }
 
-        hmac_engine.input(&endian::u32_to_array_be(u32::from(i)));
+        hmac_engine.input(&u32::from(i).to_be_bytes());
         let hmac_result: Hmac<sha512::Hash> = Hmac::from_engine(hmac_engine);
-        let sk = secp256k1::SecretKey::from_slice(&hmac_result[..32]).expect("statistically impossible to hit");
-        let tweaked = sk.add_tweak(&self.private_key.into()).expect("statistically impossible to hit");
+        let sk = secp256k1::SecretKey::from_slice(&hmac_result[..32])
+            .expect("statistically impossible to hit");
+        let tweaked =
+            sk.add_tweak(&self.private_key.into()).expect("statistically impossible to hit");
 
         Ok(ExtendedPrivKey {
             network: self.network,
@@ -604,32 +627,33 @@ impl ExtendedPrivKey {
             parent_fingerprint: self.fingerprint(secp),
             child_number: i,
             private_key: tweaked,
-            chain_code: ChainCode::from(&hmac_result[32..])
+            chain_code: ChainCode::from_hmac(hmac_result),
         })
     }
 
     /// Decoding extended private key from binary data according to BIP 32
     pub fn decode(data: &[u8]) -> Result<ExtendedPrivKey, Error> {
         if data.len() != 78 {
-            return Err(Error::WrongExtendedKeyLength(data.len()))
+            return Err(Error::WrongExtendedKeyLength(data.len()));
         }
 
-        let network = if data[0..4] == [0x04u8, 0x88, 0xAD, 0xE4] {
-            Network::Dash
-        } else if data[0..4] == [0x04u8, 0x35, 0x83, 0x94] {
-            Network::Testnet
-        } else {
-            let mut ver = [0u8; 4];
-            ver.copy_from_slice(&data[0..4]);
-            return Err(Error::UnknownVersion(ver));
+        let network = match data {
+            [0x04u8, 0x88, 0xAD, 0xE4, ..] => Network::Dash,
+            [0x04u8, 0x35, 0x83, 0x94, ..] => Network::Testnet,
+            [b0, b1, b2, b3, ..] => return Err(Error::UnknownVersion([*b0, *b1, *b2, *b3])),
+            _ => unreachable!("length checked above"),
         };
 
         Ok(ExtendedPrivKey {
             network,
             depth: data[4],
-            parent_fingerprint: Fingerprint::from(&data[5..9]),
-            child_number: endian::slice_to_u32_be(&data[9..13]).into(),
-            chain_code: ChainCode::from(&data[13..45]),
+            parent_fingerprint: data[5..9]
+                .try_into()
+                .expect("9 - 5 == 4, which is the Fingerprint length"),
+            child_number: u32::from_be_bytes(data[9..13].try_into().expect("4 byte slice")).into(),
+            chain_code: data[13..45]
+                .try_into()
+                .expect("45 - 13 == 32, which is the ChainCode length"),
             private_key: secp256k1::SecretKey::from_slice(&data[46..78])?,
         })
     }
@@ -637,13 +661,15 @@ impl ExtendedPrivKey {
     /// Extended private key binary encoding according to BIP 32
     pub fn encode(&self) -> [u8; 78] {
         let mut ret = [0; 78];
-        ret[0..4].copy_from_slice(&match self.network {
-            Network::Dash => [0x04, 0x88, 0xAD, 0xE4],
-            Network::Testnet | Network::Devnet | Network::Regtest => [0x04, 0x35, 0x83, 0x94],
-        }[..]);
-        ret[4] = self.depth as u8;
+        ret[0..4].copy_from_slice(
+            &match self.network {
+                Network::Dash => [0x04, 0x88, 0xAD, 0xE4],
+                Network::Testnet | Network::Devnet | Network::Regtest => [0x04, 0x35, 0x83, 0x94],
+            }[..],
+        );
+        ret[4] = self.depth;
         ret[5..9].copy_from_slice(&self.parent_fingerprint[..]);
-        ret[9..13].copy_from_slice(&endian::u32_to_array_be(u32::from(self.child_number)));
+        ret[9..13].copy_from_slice(&u32::from(self.child_number).to_be_bytes());
         ret[13..45].copy_from_slice(&self.chain_code[..]);
         ret[45] = 0;
         ret[46..78].copy_from_slice(&self.private_key[..]);
@@ -657,7 +683,7 @@ impl ExtendedPrivKey {
 
     /// Returns the first four bytes of the identifier
     pub fn fingerprint<C: secp256k1::Signing>(&self, secp: &Secp256k1<C>) -> Fingerprint {
-        Fingerprint::from(&self.identifier(secp)[0..4])
+        self.identifier(secp)[0..4].try_into().expect("4 is the fingerprint length")
     }
 }
 
@@ -710,20 +736,23 @@ impl ExtendedPubKey {
     }
 
     /// Compute the scalar tweak added to this key to get a child key
-    pub fn ckd_pub_tweak(&self, i: ChildNumber) -> Result<(secp256k1::SecretKey, ChainCode), Error> {
+    /// Compute the scalar tweak added to this key to get a child key
+    pub fn ckd_pub_tweak(
+        &self,
+        i: ChildNumber,
+    ) -> Result<(secp256k1::SecretKey, ChainCode), Error> {
         match i {
-            ChildNumber::Hardened { .. } => {
-                Err(Error::CannotDeriveFromHardenedKey)
-            }
+            ChildNumber::Hardened { .. } => Err(Error::CannotDeriveFromHardenedKey),
             ChildNumber::Normal { index: n } => {
-                let mut hmac_engine: HmacEngine<sha512::Hash> = HmacEngine::new(&self.chain_code[..]);
+                let mut hmac_engine: HmacEngine<sha512::Hash> =
+                    HmacEngine::new(&self.chain_code[..]);
                 hmac_engine.input(&self.public_key.serialize()[..]);
-                hmac_engine.input(&endian::u32_to_array_be(n));
+                hmac_engine.input(&n.to_be_bytes());
 
                 let hmac_result: Hmac<sha512::Hash> = Hmac::from_engine(hmac_engine);
 
                 let private_key = secp256k1::SecretKey::from_slice(&hmac_result[..32])?;
-                let chain_code = ChainCode::from(&hmac_result[32..]);
+                let chain_code = ChainCode::from_hmac(hmac_result);
                 Ok((private_key, chain_code))
             }
         }
@@ -751,23 +780,26 @@ impl ExtendedPubKey {
     /// Decoding extended public key from binary data according to BIP 32
     pub fn decode(data: &[u8]) -> Result<ExtendedPubKey, Error> {
         if data.len() != 78 {
-            return Err(Error::WrongExtendedKeyLength(data.len()))
+            return Err(Error::WrongExtendedKeyLength(data.len()));
         }
 
+        let network = match data {
+            [0x04u8, 0x88, 0xB2, 0x1E, ..] => Network::Dash,
+            [0x04u8, 0x35, 0x87, 0xCF, ..] => Network::Testnet,
+            [b0, b1, b2, b3, ..] => return Err(Error::UnknownVersion([*b0, *b1, *b2, *b3])),
+            _ => unreachable!("length checked above"),
+        };
+
         Ok(ExtendedPubKey {
-            network: if data[0..4] == [0x04u8, 0x88, 0xB2, 0x1E] {
-                Network::Dash
-            } else if data[0..4] == [0x04u8, 0x35, 0x87, 0xCF] {
-                Network::Testnet
-            } else {
-                let mut ver = [0u8; 4];
-                ver.copy_from_slice(&data[0..4]);
-                return Err(Error::UnknownVersion(ver));
-            },
+            network,
             depth: data[4],
-            parent_fingerprint: Fingerprint::from(&data[5..9]),
-            child_number: endian::slice_to_u32_be(&data[9..13]).into(),
-            chain_code: ChainCode::from(&data[13..45]),
+            parent_fingerprint: data[5..9]
+                .try_into()
+                .expect("9 - 5 == 4, which is the Fingerprint length"),
+            child_number: u32::from_be_bytes(data[9..13].try_into().expect("4 byte slice")).into(),
+            chain_code: data[13..45]
+                .try_into()
+                .expect("45 - 13 == 32, which is the ChainCode length"),
             public_key: secp256k1::PublicKey::from_slice(&data[45..78])?,
         })
     }
@@ -775,13 +807,15 @@ impl ExtendedPubKey {
     /// Extended public key binary encoding according to BIP 32
     pub fn encode(&self) -> [u8; 78] {
         let mut ret = [0; 78];
-        ret[0..4].copy_from_slice(&match self.network {
-            Network::Dash => [0x04u8, 0x88, 0xB2, 0x1E],
-            Network::Testnet | Network::Devnet | Network::Regtest => [0x04u8, 0x35, 0x87, 0xCF],
-        }[..]);
-        ret[4] = self.depth as u8;
+        ret[0..4].copy_from_slice(
+            &match self.network {
+                Network::Dash => [0x04u8, 0x88, 0xB2, 0x1E],
+                Network::Testnet | Network::Devnet | Network::Regtest => [0x04u8, 0x35, 0x87, 0xCF],
+            }[..],
+        );
+        ret[4] = self.depth;
         ret[5..9].copy_from_slice(&self.parent_fingerprint[..]);
-        ret[9..13].copy_from_slice(&endian::u32_to_array_be(u32::from(self.child_number)));
+        ret[9..13].copy_from_slice(&u32::from(self.child_number).to_be_bytes());
         ret[13..45].copy_from_slice(&self.chain_code[..]);
         ret[45..78].copy_from_slice(&self.public_key.serialize()[..]);
         ret
@@ -796,13 +830,13 @@ impl ExtendedPubKey {
 
     /// Returns the first four bytes of the identifier
     pub fn fingerprint(&self) -> Fingerprint {
-        Fingerprint::from(&self.identifier()[0..4])
+        self.identifier()[0..4].try_into().expect("4 is the fingerprint length")
     }
 }
 
 impl fmt::Display for ExtendedPrivKey {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        base58::check_encode_slice_to_fmt(fmt, &self.encode()[..])
+        base58::encode_check_to_fmt(fmt, &self.encode()[..])
     }
 }
 
@@ -810,7 +844,7 @@ impl FromStr for ExtendedPrivKey {
     type Err = Error;
 
     fn from_str(inp: &str) -> Result<ExtendedPrivKey, Error> {
-        let data = base58::from_check(inp)?;
+        let data = base58::decode_check(inp)?;
 
         if data.len() != 78 {
             return Err(base58::Error::InvalidLength(data.len()).into());
@@ -822,7 +856,7 @@ impl FromStr for ExtendedPrivKey {
 
 impl fmt::Display for ExtendedPubKey {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        base58::check_encode_slice_to_fmt(fmt, &self.encode()[..])
+        base58::encode_check_to_fmt(fmt, &self.encode()[..])
     }
 }
 
@@ -830,7 +864,7 @@ impl FromStr for ExtendedPubKey {
     type Err = Error;
 
     fn from_str(inp: &str) -> Result<ExtendedPubKey, Error> {
-        let data = base58::from_check(inp)?;
+        let data = base58::decode_check(inp)?;
 
         if data.len() != 78 {
             return Err(base58::Error::InvalidLength(data.len()).into());
@@ -850,7 +884,7 @@ mod tests {
     use secp256k1::{self, Secp256k1};
     use hashes::hex::FromHex;
 
-    use network::constants::Network::{self, Dash};
+    use crate::network::constants::Network::{self, Dash};
 
     #[test]
     fn test_parse_derivation_path() {
@@ -1027,8 +1061,8 @@ mod tests {
 
         // m/0h/1
         test_path(&secp, Dash, &seed, "m/0h/1".parse().unwrap(),
-                   "xprv9xc7kxoRsCeHwh7uK4gPumyqpdGcUVB5XjAKHTjPnrNLr6uMz6ZkpieuVDJykxumA5rWaHrCgRKsDEHnHnVhAHoYkwofb8aWF29xZAsRecq",
-                   "xpub6BbUAULKhaCbABCNR6DQGuvaNf76swtvtx5v5r91MBuKiuEWXdt1NWyPLWgDeT4yFBEyfL5r3y7CDAWmzzwa3EbdGEvJky6cMmTCRg5KPE7");
+                  "xprv9xc7kxoRsCeHwh7uK4gPumyqpdGcUVB5XjAKHTjPnrNLr6uMz6ZkpieuVDJykxumA5rWaHrCgRKsDEHnHnVhAHoYkwofb8aWF29xZAsRecq",
+                  "xpub6BbUAULKhaCbABCNR6DQGuvaNf76swtvtx5v5r91MBuKiuEWXdt1NWyPLWgDeT4yFBEyfL5r3y7CDAWmzzwa3EbdGEvJky6cMmTCRg5KPE7");
 
         // m/0h/1/2h
         test_path(&secp, Dash, &seed, "m/0h/1/2h".parse().unwrap(),
@@ -1114,10 +1148,8 @@ mod tests {
     #[cfg(feature = "serde")]
     pub fn encode_fingerprint_chaincode() {
         use serde_json;
-        let fp = Fingerprint::from(&[1u8,2,3,42][..]);
-        let cc = ChainCode::from(
-            &[1u8,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2][..]
-        );
+        let fp = Fingerprint::from([1u8,2,3,42]);
+        let cc = ChainCode::from([1u8,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2]);
 
         serde_round_trip!(fp);
         serde_round_trip!(cc);
diff --git a/dash/src/blockdata/block.rs b/dash/src/blockdata/block.rs
new file mode 100644
index 000000000..0694fe8f9
--- /dev/null
+++ b/dash/src/blockdata/block.rs
@@ -0,0 +1,636 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+//! Bitcoin blocks.
+//!
+//! A block is a bundle of transactions with a proof-of-work attached,
+//! which commits to an earlier block to form the blockchain. This
+//! module describes structures and functions needed to describe
+//! these blocks and the blockchain.
+//!
+
+use core::fmt;
+
+use hashes::{Hash, HashEngine};
+
+use super::Weight;
+use crate::blockdata::script;
+use crate::blockdata::transaction::Transaction;
+use crate::consensus::{encode, Decodable, Encodable};
+use crate::error::Error::{self, BlockBadProofOfWork, BlockBadTarget};
+pub use crate::hash_types::BlockHash;
+use crate::hash_types::{TxMerkleNode, WitnessCommitment, WitnessMerkleNode, Wtxid};
+use crate::internal_macros::impl_consensus_encoding;
+use crate::pow::{CompactTarget, Target, Work};
+use crate::prelude::*;
+use crate::{io, merkle_tree, VarInt};
+
+/// Bitcoin block header.
+///
+/// Contains all the block's information except the actual transactions, but
+/// including a root of a [merkle tree] commiting to all transactions in the block.
+///
+/// [merkle tree]: https://en.wikipedia.org/wiki/Merkle_tree
+///
+/// ### Bitcoin Core References
+///
+/// * [CBlockHeader definition](https://github.com/bitcoin/bitcoin/blob/345457b542b6a980ccfbc868af0970a6f91d1b82/src/primitives/block.h#L20)
+#[derive(Copy, PartialEq, Eq, Clone, Debug, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Header {
+    /// Block version, now repurposed for soft fork signalling.
+    pub version: Version,
+    /// Reference to the previous block in the chain.
+    pub prev_blockhash: BlockHash,
+    /// The root hash of the merkle tree of transactions in the block.
+    pub merkle_root: TxMerkleNode,
+    /// The timestamp of the block, as claimed by the miner.
+    pub time: u32,
+    /// The target value below which the blockhash must lie.
+    pub bits: CompactTarget,
+    /// The nonce, selected to obtain a low enough blockhash.
+    pub nonce: u32,
+}
+
+impl_consensus_encoding!(Header, version, prev_blockhash, merkle_root, time, bits, nonce);
+
+impl Header {
+    /// Returns the block hash.
+    pub fn block_hash(&self) -> BlockHash {
+        let mut engine = BlockHash::engine();
+        self.consensus_encode(&mut engine).expect("engines don't error");
+        BlockHash::from_engine(engine)
+    }
+
+    /// Computes the target (range [0, T] inclusive) that a blockhash must land in to be valid.
+    pub fn target(&self) -> Target { self.bits.into() }
+
+    /// Computes the popular "difficulty" measure for mining.
+    pub fn difficulty(&self) -> u128 { self.target().difficulty() }
+
+    /// Computes the popular "difficulty" measure for mining and returns a float value of f64.
+    pub fn difficulty_float(&self) -> f64 { self.target().difficulty_float() }
+
+    /// Checks that the proof-of-work for the block is valid, returning the block hash.
+    pub fn validate_pow(&self, required_target: Target) -> Result<BlockHash, Error> {
+        let target = self.target();
+        if target != required_target {
+            return Err(BlockBadTarget);
+        }
+        let block_hash = self.block_hash();
+        if target.is_met_by(block_hash) {
+            Ok(block_hash)
+        } else {
+            Err(BlockBadProofOfWork)
+        }
+    }
+
+    /// Returns the total work of the block.
+    pub fn work(&self) -> Work { self.target().to_work() }
+}
+
+/// Bitcoin block version number.
+///
+/// Originally used as a protocol version, but repurposed for soft-fork signaling.
+///
+/// The inner value is a signed integer in Bitcoin Core for historical reasons, if version bits is
+/// being used the top three bits must be 001, this gives us a useful range of [0x20000000...0x3FFFFFFF].
+///
+/// > When a block nVersion does not have top bits 001, it is treated as if all bits are 0 for the purposes of deployments.
+///
+/// ### Relevant BIPs
+///
+/// * [BIP9 - Version bits with timeout and delay](https://github.com/bitcoin/bips/blob/master/bip-0009.mediawiki) (current usage)
+/// * [BIP34 - Block v2, Height in Coinbase](https://github.com/bitcoin/bips/blob/master/bip-0034.mediawiki)
+#[derive(Copy, PartialEq, Eq, Clone, Debug, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Version(i32);
+
+impl Version {
+    /// The original Bitcoin Block v1.
+    pub const ONE: Self = Self(1);
+
+    /// BIP-34 Block v2.
+    pub const TWO: Self = Self(2);
+
+    /// BIP-9 compatible version number that does not signal for any softforks.
+    pub const NO_SOFT_FORK_SIGNALLING: Self = Self(Self::USE_VERSION_BITS as i32);
+
+    /// BIP-9 soft fork signal bits mask.
+    const VERSION_BITS_MASK: u32 = 0x1FFF_FFFF;
+
+    /// 32bit value starting with `001` to use version bits.
+    ///
+    /// The value has the top three bits `001` which enables the use of version bits to signal for soft forks.
+    const USE_VERSION_BITS: u32 = 0x2000_0000;
+
+    /// Creates a [`Version`] from a signed 32 bit integer value.
+    ///
+    /// This is the data type used in consensus code in Bitcoin Core.
+    pub fn from_consensus(v: i32) -> Self { Version(v) }
+
+    /// Returns the inner `i32` value.
+    ///
+    /// This is the data type used in consensus code in Bitcoin Core.
+    pub fn to_consensus(self) -> i32 { self.0 }
+
+    /// Checks whether the version number is signalling a soft fork at the given bit.
+    ///
+    /// A block is signalling for a soft fork under BIP-9 if the first 3 bits are `001` and
+    /// the version bit for the specific soft fork is toggled on.
+    pub fn is_signalling_soft_fork(&self, bit: u8) -> bool {
+        // Only bits [0, 28] inclusive are used for signalling.
+        if bit > 28 {
+            return false;
+        }
+
+        // To signal using version bits, the first three bits must be `001`.
+        if (self.0 as u32) & !Self::VERSION_BITS_MASK != Self::USE_VERSION_BITS {
+            return false;
+        }
+
+        // The bit is set if signalling a soft fork.
+        (self.0 as u32 & Self::VERSION_BITS_MASK) & (1 << bit) > 0
+    }
+}
+
+impl Default for Version {
+    fn default() -> Version { Self::NO_SOFT_FORK_SIGNALLING }
+}
+
+impl Encodable for Version {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        self.0.consensus_encode(w)
+    }
+}
+
+impl Decodable for Version {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        Decodable::consensus_decode(r).map(Version)
+    }
+}
+
+/// Bitcoin block.
+///
+/// A collection of transactions with an attached proof of work.
+///
+/// See [Bitcoin Wiki: Block][wiki-block] for more information.
+///
+/// [wiki-block]: https://en.bitcoin.it/wiki/Block
+///
+/// ### Bitcoin Core References
+///
+/// * [CBlock definition](https://github.com/bitcoin/bitcoin/blob/345457b542b6a980ccfbc868af0970a6f91d1b82/src/primitives/block.h#L62)
+#[derive(PartialEq, Eq, Clone, Debug)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Block {
+    /// The block header
+    pub header: Header,
+    /// List of transactions contained in the block
+    pub txdata: Vec<Transaction>,
+}
+
+impl_consensus_encoding!(Block, header, txdata);
+
+impl Block {
+    /// Returns the block hash.
+    pub fn block_hash(&self) -> BlockHash { self.header.block_hash() }
+
+    /// Checks if merkle root of header matches merkle root of the transaction list.
+    pub fn check_merkle_root(&self) -> bool {
+        match self.compute_merkle_root() {
+            Some(merkle_root) => self.header.merkle_root == merkle_root,
+            None => false,
+        }
+    }
+
+    /// Checks if witness commitment in coinbase matches the transaction list.
+    pub fn check_witness_commitment(&self) -> bool {
+        const MAGIC: [u8; 6] = [0x6a, 0x24, 0xaa, 0x21, 0xa9, 0xed];
+        // Witness commitment is optional if there are no transactions using SegWit in the block.
+        if self.txdata.iter().all(|t| t.input.iter().all(|i| i.witness.is_empty())) {
+            return true;
+        }
+
+        if self.txdata.is_empty() {
+            return false;
+        }
+
+        let coinbase = &self.txdata[0];
+        if !coinbase.is_coin_base() {
+            return false;
+        }
+
+        // Commitment is in the last output that starts with magic bytes.
+        if let Some(pos) = coinbase
+            .output
+            .iter()
+            .rposition(|o| o.script_pubkey.len() >= 38 && o.script_pubkey.as_bytes()[0..6] == MAGIC)
+        {
+            let commitment = WitnessCommitment::from_slice(
+                &coinbase.output[pos].script_pubkey.as_bytes()[6..38],
+            )
+            .unwrap();
+            // Witness reserved value is in coinbase input witness.
+            let witness_vec: Vec<_> = coinbase.input[0].witness.iter().collect();
+            if witness_vec.len() == 1 && witness_vec[0].len() == 32 {
+                if let Some(witness_root) = self.witness_root() {
+                    return commitment
+                        == Self::compute_witness_commitment(&witness_root, witness_vec[0]);
+                }
+            }
+        }
+
+        false
+    }
+
+    /// Computes the transaction merkle root.
+    pub fn compute_merkle_root(&self) -> Option<TxMerkleNode> {
+        let hashes = self.txdata.iter().map(|obj| obj.txid().to_raw_hash());
+        merkle_tree::calculate_root(hashes).map(|h| h.into())
+    }
+
+    /// Computes the witness commitment for the block's transaction list.
+    pub fn compute_witness_commitment(
+        witness_root: &WitnessMerkleNode,
+        witness_reserved_value: &[u8],
+    ) -> WitnessCommitment {
+        let mut encoder = WitnessCommitment::engine();
+        witness_root.consensus_encode(&mut encoder).expect("engines don't error");
+        encoder.input(witness_reserved_value);
+        WitnessCommitment::from_engine(encoder)
+    }
+
+    /// Computes the merkle root of transactions hashed for witness.
+    pub fn witness_root(&self) -> Option<WitnessMerkleNode> {
+        let hashes = self.txdata.iter().enumerate().map(|(i, t)| {
+            if i == 0 {
+                // Replace the first hash with zeroes.
+                Wtxid::all_zeros().to_raw_hash()
+            } else {
+                t.wtxid().to_raw_hash()
+            }
+        });
+        merkle_tree::calculate_root(hashes).map(|h| h.into())
+    }
+
+    /// base_size == size of header + size of encoded transaction count.
+    fn base_size(&self) -> usize { 80 + VarInt(self.txdata.len() as u64).len() }
+
+    /// Returns the size of the block.
+    ///
+    /// size == size of header + size of encoded transaction count + total size of transactions.
+    pub fn size(&self) -> usize {
+        let txs_size: usize = self.txdata.iter().map(Transaction::size).sum();
+        self.base_size() + txs_size
+    }
+
+    /// Returns the strippedsize of the block.
+    pub fn strippedsize(&self) -> usize {
+        let txs_size: usize = self.txdata.iter().map(Transaction::strippedsize).sum();
+        self.base_size() + txs_size
+    }
+
+    /// Returns the weight of the block.
+    pub fn weight(&self) -> Weight {
+        let base_weight = Weight::from_non_witness_data_size(self.base_size() as u64);
+        let txs_weight: Weight = self.txdata.iter().map(Transaction::weight).sum();
+        base_weight + txs_weight
+    }
+
+    /// Returns the coinbase transaction, if one is present.
+    pub fn coinbase(&self) -> Option<&Transaction> { self.txdata.first() }
+
+    /// Returns the block height, as encoded in the coinbase transaction according to BIP34.
+    pub fn bip34_block_height(&self) -> Result<u64, Bip34Error> {
+        // Citing the spec:
+        // Add height as the first item in the coinbase transaction's scriptSig,
+        // and increase block version to 2. The format of the height is
+        // "minimally encoded serialized CScript"" -- first byte is number of bytes in the number
+        // (will be 0x03 on main net for the next 150 or so years with 2^23-1
+        // blocks), following bytes are little-endian representation of the
+        // number (including a sign bit). Height is the height of the mined
+        // block in the block chain, where the genesis block is height zero (0).
+
+        if self.header.version < Version::TWO {
+            return Err(Bip34Error::Unsupported);
+        }
+
+        let cb = self.coinbase().ok_or(Bip34Error::NotPresent)?;
+        let input = cb.input.first().ok_or(Bip34Error::NotPresent)?;
+        let push = input.script_sig.instructions_minimal().next().ok_or(Bip34Error::NotPresent)?;
+        match push.map_err(|_| Bip34Error::NotPresent)? {
+            script::Instruction::PushBytes(b) => {
+                // Check that the number is encoded in the minimal way.
+                let h = script::read_scriptint(b.as_bytes())
+                    .map_err(|_e| Bip34Error::UnexpectedPush(b.as_bytes().to_vec()))?;
+                if h < 0 {
+                    Err(Bip34Error::NegativeHeight)
+                } else {
+                    Ok(h as u64)
+                }
+            }
+            _ => Err(Bip34Error::NotPresent),
+        }
+    }
+}
+
+/// An error when looking up a BIP34 block height.
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[non_exhaustive]
+pub enum Bip34Error {
+    /// The block does not support BIP34 yet.
+    Unsupported,
+    /// No push was present where the BIP34 push was expected.
+    NotPresent,
+    /// The BIP34 push was larger than 8 bytes.
+    UnexpectedPush(Vec<u8>),
+    /// The BIP34 push was negative.
+    NegativeHeight,
+}
+
+impl fmt::Display for Bip34Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Bip34Error::Unsupported => write!(f, "block doesn't support BIP34"),
+            Bip34Error::NotPresent => write!(f, "BIP34 push not present in block's coinbase"),
+            Bip34Error::UnexpectedPush(ref p) => {
+                write!(f, "unexpected byte push of > 8 bytes: {:?}", p)
+            }
+            Bip34Error::NegativeHeight => write!(f, "negative BIP34 height"),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Bip34Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Bip34Error::*;
+
+        match self {
+            Unsupported | NotPresent | UnexpectedPush(_) | NegativeHeight => None,
+        }
+    }
+}
+
+impl From<Header> for BlockHash {
+    fn from(header: Header) -> BlockHash { header.block_hash() }
+}
+
+impl From<&Header> for BlockHash {
+    fn from(header: &Header) -> BlockHash { header.block_hash() }
+}
+
+impl From<Block> for BlockHash {
+    fn from(block: Block) -> BlockHash { block.block_hash() }
+}
+
+impl From<&Block> for BlockHash {
+    fn from(block: &Block) -> BlockHash { block.block_hash() }
+}
+
+#[cfg(test)]
+mod tests {
+    use hashes::hex::FromHex;
+
+    use super::*;
+    use crate::consensus::encode::{deserialize, serialize};
+    use crate::internal_macros::hex;
+
+    #[test]
+    fn test_coinbase_and_bip34() {
+        // testnet block 100,000
+        const BLOCK_HEX: &str = "0200000035ab154183570282ce9afc0b494c9fc6a3cfea05aa8c1add2ecc56490000000038ba3d78e4500a5a7570dbe61960398add4410d278b21cd9708e6d9743f374d544fc055227f1001c29c1ea3b0101000000010000000000000000000000000000000000000000000000000000000000000000ffffffff3703a08601000427f1001c046a510100522cfabe6d6d0000000000000000000068692066726f6d20706f6f6c7365727665726aac1eeeed88ffffffff0100f2052a010000001976a914912e2b234f941f30b18afbb4fa46171214bf66c888ac00000000";
+        let block: Block = deserialize(&hex!(BLOCK_HEX)).unwrap();
+
+        let cb_txid = "d574f343976d8e70d91cb278d21044dd8a396019e6db70755a0a50e4783dba38";
+        assert_eq!(block.coinbase().unwrap().txid().to_string(), cb_txid);
+
+        assert_eq!(block.bip34_block_height(), Ok(100_000));
+
+        // block with 9-byte bip34 push
+        const BAD_HEX: &str = "0200000035ab154183570282ce9afc0b494c9fc6a3cfea05aa8c1add2ecc56490000000038ba3d78e4500a5a7570dbe61960398add4410d278b21cd9708e6d9743f374d544fc055227f1001c29c1ea3b0101000000010000000000000000000000000000000000000000000000000000000000000000ffffffff3d09a08601112233445566000427f1001c046a510100522cfabe6d6d0000000000000000000068692066726f6d20706f6f6c7365727665726aac1eeeed88ffffffff0100f2052a010000001976a914912e2b234f941f30b18afbb4fa46171214bf66c888ac00000000";
+        let bad: Block = deserialize(&hex!(BAD_HEX)).unwrap();
+
+        let push = Vec::<u8>::from_hex("a08601112233445566").unwrap();
+        assert_eq!(bad.bip34_block_height(), Err(super::Bip34Error::UnexpectedPush(push)));
+    }
+
+    #[test]
+    fn block_test() {
+        // Mainnet block 0000000000000027facf8fffe7c4f92345edf06ee2615eae06b3e20392e22ddf
+
+        let some_block = hex!("0000002085691f6a060e65346c281ed25b99dbd18c139053562ccd001d00000000000000377b6aa24658b7a0ae7b73f0673d047a291de5cbc06907038b288b2ebf491c2c99e17564c39d3219922665920403000500010000000000000000000000000000000000000000000000000000000000000000ffffffff330341ac1c0499e175642f706f6f6c696e2e636f6d2f5e9fea0288e95fd8864ea6cbf620d16e0c3c6af5d400f8e2030000000000ffffffff027eef8d08000000001976a9147fca51bce950b0ccf0a4994e3d6266202d27aa1f88ac59724506000000001976a914a8d608a131a5fd9c0ac063b33629da422adab17f88ac0000000046020041ac1c00facd1b5ccda08840168298c576b0c52223deb79340147fb85c71125b8bc9b1a1af27d4c4d5a7bfedec9d3fc55e518e69b6d19cb5e69e5e598390eb8e08d520ad020000000a3ad82d89650bd51c3c3a786b19dd96803486714806b23e2b2b80b0a2cc20940e0a0000006a473044022059522a9a08785941d94d49974defb8564df87b14c43e89012ab26a07a0e1fe3502206dd77ad419572dd313c10732c782c35af490ff4d7d66163251f8fb8e19e90673812103b305a67ea06e4e1f92348c3094e8f4f3ef4d2b71cfce820a3eb1146953aa54ecffffffff42053267bef6f60df91d82884d29e2958ef7f54841900a60ee6f05c60eace820090000006a47304402200590006238984ee825598c19fcdea59ab31dee2dbb070e5ccf0119944b4cb04902205fa8716d9bede943d541d17d4ca734db2d22ad3fed01c6c56c95054f155b69a58121039d44af4777fd248075efa405617ee359d154bad4f191a1891584a1bae2f0a3c8ffffffffab5326503d2a3aec5de7b6b103857014e2cbda352f6ce7f36ce5fab62d97ec5a060000006a47304402200877a392154cd6159a6cad5691c5a4966d9f82d2c6b1a9caee35cdcf483e10560220638fe365c0f06e99172095539a007bdd40d4fdd4e006b82de74b4ef2a8bc39bd8121036465d0697e496d4e8904af8bed6ddb62742d242ec590668e9f06cc6400c3bd48ffffffff0aa9307b3d4f088cd323a2d2d0eaeffd19c249a7f92ae515ac5bcc61d9d1636a090000006a473044022044e34eac2f10ffd13dba6f280cf652a6bbb7822f58e9d22b740de927f2c8f715022003ad63dd45e63fcd9bd3cbad50e263b47781e43ac826c5e9946ea85ac4112ccb812102537d0186300c6b3822c0a782fd759cde267578e1d6b91caa56f9f68742aa8cd2ffffffff793c4b443b64a24df23ca38a72868d2c47db3d59ac91e20ceecae49a0428a16e000000006a473044022047e3f22981b7ce4126833b1c30b9fcd26b94c7bb00685685eec459f9fef662cb022008261cfa827367ed6f435662f8e981aa151edd60732fe8e850d16775e59c9bc481210318dbab4b910f84ca2e39e8394ea1a8704e99ef63fec246828d11ea16890ae760ffffffff537dc28f8beb3e7e41fdf1b0334944fcee4d61fa2474544c3681e761899f5280010000006a47304402202d11266b3135fea8f306f9216fb0c2e616061fbd3123e6b2d5154f340c8b281202201b9979ed1e984e5897aa7588db9b6a5ab378ba8775b3bdd4cb1b22b35cc739328121021aaf09e74e7359025a081ad6287252fa548998a8eeb1f7b011e9b97076cc7a98ffffffffdb3822973be47001160dbde2cf4820935aaaf9ea44f57f8b74162caa40278e85020000006a47304402202e97c9e0648b079e674dab23e730ff8250b346f1bde1a4a9b5d6913593b0db9c0220502f8d462f44bab07f6ed4f38bfcf28e806b51a12b0b4b3d5ba44aabaa30cf71812103c217bda5f470049ac72891b3dc0713cc54eb47fa27cde0563a4e75231cb8d321ffffffffa5a31780a8882e415d9327c5eb92e0431eef0531b05fd9a0329b055818992f90070000006a4730440220016c79f9ba2e199e6c9c66600c451369934c277a21125f96f741158bd770ae3b0220497aca6bfcc27c9aa034b7a1d5e8701cb410cc19343ed97358aafd4a3a715c7981210231515594922ab111946501d73652075928fb8351e68f489281fd987b37dcacd1ffffffffa5a31780a8882e415d9327c5eb92e0431eef0531b05fd9a0329b055818992f900f0000006a47304402207d5f21240ac0e96401fcd76d505f09265ae495d5f16dd9a56a8f6f47e5bfd1d4022018ed8f4d809550ec56a89ae785374fb1d14ca31b4f1b064468ceed594d58fba581210205af51c307f2272edd6be30a40c9dee2264d695df18e8bf5085134b07c21aa90ffffffff0b0cc0f4193f5faf7989fec2d8113aae7fd4e0f02183d86f64a8e3ecfdb62ec6060000006a47304402204477e888b7add62c6f8e546cb022b3cfa66c8a3b47b19bc9da3977fa5e47719f02205c5f8dd019c40912675d461fb7e9df5659a116bc5d6bddf88105d744aedd5bf9812102a4d5640169a611d5a425cf283733bf1ca1e4305641e6e32f55318128996d49f6ffffffff0ae4969800000000001976a91402682b9c4057be3d659f8b77d816420eca6623a788ace4969800000000001976a914706e0929d67718f809f0d0cfc2a0dff33cd6211688ace4969800000000001976a91470bddf58d78cf86181bf8002e3814f5f9dcb6e9f88ace4969800000000001976a914939585a92055678e8e80f50c2fc95b18046309ed88ace4969800000000001976a914b2a4861161d70d3fea3711647039748307df371688ace4969800000000001976a914c68595efca8dcce63fc3f93fa4d50b959d13481088ace4969800000000001976a914cb7bf4a6f28c5fe4c61877a5b277cc4176362cd088ace4969800000000001976a914cbfc1fb5b084511d12b944e74be10128e6e2d8cd88ace4969800000000001976a914da5b67199ed49c897d8ebb8b9a4cb4b13389408f88ace4969800000000001976a914ff2928603068b6e604ff2f9068750055e8ac749888ac000000000200000010d56c3fb5729083036bbe413f2752f2ab953e676a8108ef1b9a02c5e88cff2e2b040000006a47304402201c0e70a104bb0e3d30fd2d1e48fb6bc7957e82f6dfe86d98fecdde4ce4e34dda0220250ade7d7728fa849f556714246af09a797b26d453025ab3b97cd5a97b511948812102a6b4e237a0819147f791f17fda43124f8b40f3096437223eb6528d7411eb4342ffffffff3626128fb20b46c9a5ca5996d3e17eb6b059cea8c4b658c773904aaa3f1ff249080000006a473044022033fb2bc10fcd57361c180891a76723420d8ca4b635ef8a99985ba95400d1e4cb02202895cf108b2c78c2cebaf93c028b3feb9779488e365917ca19fccca765c638b681210203bcf24fba0aa30424907f90af46810b504ae29c0a794e4aa623d2295f59ba02ffffffff81d261138ebb27392f6fa1a94bc1b167bbc4bf68226496f84f471def0688e15c000000006a4730440220698865708e1373d6dd1b9832feb7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");
+        let cutoff_block = hex!("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");
+
+        let prevhash = hex!("85691f6a060e65346c281ed25b99dbd18c139053562ccd001d00000000000000");
+        let merkle = hex!("377b6aa24658b7a0ae7b73f0673d047a291de5cbc06907038b288b2ebf491c2c");
+
+        let work_bytes: [u8; 32] = hex!("000000000000000000000000000000000000000000000000050ec30af44bf25e").try_into().unwrap();
+        let work = Work::from_be_bytes(work_bytes);
+
+        let decode: Result<Block, _> = deserialize(&some_block);
+        let bad_decode: Result<Block, _> = deserialize(&cutoff_block);
+
+        assert!(decode.is_ok());
+        assert!(bad_decode.is_err());
+        let real_decode = decode.unwrap();
+        assert_eq!(real_decode.header.version, Version(536870912));
+        assert_eq!(serialize(&real_decode.header.prev_blockhash), prevhash);
+        assert_eq!(real_decode.header.merkle_root, real_decode.compute_merkle_root().unwrap());
+        assert_eq!(serialize(&real_decode.header.merkle_root), merkle);
+        assert_eq!(real_decode.header.time, 1685447065);
+        assert_eq!(real_decode.header.bits, CompactTarget::from_consensus(422747587));
+        assert_eq!(real_decode.header.nonce, 2456102546);
+        assert_eq!(real_decode.header.work(), work);
+        assert_eq!(
+            real_decode.header.validate_pow(real_decode.header.target()).
+                unwrap(),
+            real_decode.block_hash()
+        );
+        assert_eq!(real_decode.header.difficulty(), 84852220);
+        assert_eq!(real_decode.header.difficulty_float(), 84852220.19239795);
+        // [test] TODO: check the transaction data
+
+        assert_eq!(real_decode.size(), some_block.len());
+        assert_eq!(real_decode.strippedsize(), some_block.len());
+        assert_eq!(
+            real_decode.weight(),
+            Weight::from_non_witness_data_size(some_block.len() as u64)
+        );
+
+        // should be also ok for a non-witness block as commitment is optional in that case
+        assert!(real_decode.check_witness_commitment());
+
+        assert_eq!(serialize(&real_decode), some_block);
+    }
+
+    // Check testnet block 000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b
+    #[ignore]
+    #[test]
+    fn segwit_block_test() {
+        let segwit_block = include_bytes!("../../tests/data/testnet_block_000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b.raw").to_vec();
+
+        let decode: Result<Block, _> = deserialize(&segwit_block);
+
+        let prevhash = hex!("2aa2f2ca794ccbd40c16e2f3333f6b8b683f9e7179b2c4d74906000000000000");
+        let merkle = hex!("10bc26e70a2f672ad420a6153dd0c28b40a6002c55531bfc99bf8994a8e8f67e");
+        let work = Work::from(0x257c3becdacc64_u64);
+
+        assert!(decode.is_ok());
+        let real_decode = decode.unwrap();
+        assert_eq!(real_decode.header.version, Version(Version::USE_VERSION_BITS as i32)); // VERSIONBITS but no bits set
+        assert_eq!(serialize(&real_decode.header.prev_blockhash), prevhash);
+        assert_eq!(serialize(&real_decode.header.merkle_root), merkle);
+        assert_eq!(real_decode.header.merkle_root, real_decode.compute_merkle_root().unwrap());
+        assert_eq!(real_decode.header.time, 1472004949);
+        assert_eq!(real_decode.header.bits, CompactTarget::from_consensus(0x1a06d450));
+        assert_eq!(real_decode.header.nonce, 1879759182);
+        assert_eq!(real_decode.header.work(), work);
+        assert_eq!(
+            real_decode.header.validate_pow(real_decode.header.target()).unwrap(),
+            real_decode.block_hash()
+        );
+        assert_eq!(real_decode.header.difficulty(), 2456598);
+        assert_eq!(real_decode.header.difficulty_float(), 2456598.4399242126);
+        // [test] TODO: check the transaction data
+
+        assert_eq!(real_decode.size(), segwit_block.len());
+        assert_eq!(real_decode.strippedsize(), 4283);
+        assert_eq!(real_decode.weight(), Weight::from_wu(17168));
+
+        assert!(real_decode.check_witness_commitment());
+
+        assert_eq!(serialize(&real_decode), segwit_block);
+    }
+
+    #[test]
+    fn block_version_test() {
+        let block = hex!("ffffff7f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
+        let decode: Result<Block, _> = deserialize(&block);
+        assert!(decode.is_ok());
+        let real_decode = decode.unwrap();
+        assert_eq!(real_decode.header.version, Version(2147483647));
+
+        let block2 = hex!("000000800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
+        let decode2: Result<Block, _> = deserialize(&block2);
+        assert!(decode2.is_ok());
+        let real_decode2 = decode2.unwrap();
+        assert_eq!(real_decode2.header.version, Version(-2147483648));
+    }
+
+    #[test]
+    fn validate_pow_test() {
+        let some_header = hex!("0000002085691f6a060e65346c281ed25b99dbd18c139053562ccd001d00000000000000377b6aa24658b7a0ae7b73f0673d047a291de5cbc06907038b288b2ebf491c2c99e17564c39d321992266592");
+        let some_header: Header =
+            deserialize(&some_header).expect("Can't deserialize correct block header");
+        assert_eq!(
+            some_header.validate_pow(some_header.target()).unwrap(),
+            some_header.block_hash()
+        );
+
+        // test with zero target
+        match some_header.validate_pow(Target::ZERO) {
+            Err(BlockBadTarget) => (),
+            _ => panic!("unexpected result from validate_pow"),
+        }
+
+        // test with modified header
+        let mut invalid_header: Header = some_header;
+        invalid_header.version.0 += 1;
+        match invalid_header.validate_pow(invalid_header.target()) {
+            Err(BlockBadProofOfWork) => (),
+            _ => panic!("unexpected result from validate_pow"),
+        }
+    }
+
+    #[test]
+    fn compact_roundrtip_test() {
+        let some_header = hex!("010000004ddccd549d28f385ab457e98d1b11ce80bfea2c5ab93015ade4973e400000000bf4473e53794beae34e64fccc471dace6ae544180816f89591894e0f417a914cd74d6e49ffff001d323b3a7b");
+
+        let header: Header =
+            deserialize(&some_header).expect("Can't deserialize correct block header");
+
+        assert_eq!(header.bits, header.target().to_compact_lossy());
+    }
+
+    #[test]
+    fn soft_fork_signalling() {
+        for i in 0..31 {
+            let version_int = (0x20000000u32 ^ 1 << i) as i32;
+            let version = Version(version_int);
+            if i < 29 {
+                assert!(version.is_signalling_soft_fork(i));
+            } else {
+                assert!(!version.is_signalling_soft_fork(i));
+            }
+        }
+
+        let segwit_signal = Version(0x20000000 ^ 1 << 1);
+        assert!(!segwit_signal.is_signalling_soft_fork(0));
+        assert!(segwit_signal.is_signalling_soft_fork(1));
+        assert!(!segwit_signal.is_signalling_soft_fork(2));
+    }
+}
+
+#[cfg(bench)]
+mod benches {
+    use test::{black_box, Bencher};
+
+    use super::Block;
+    use crate::consensus::{deserialize, Decodable, Encodable};
+    use crate::EmptyWrite;
+
+    #[bench]
+    pub fn bench_stream_reader(bh: &mut Bencher) {
+        let big_block = include_bytes!("../../tests/data/mainnet_block_000000000000000000000c835b2adcaedc20fdf6ee440009c249452c726dafae.raw");
+        assert_eq!(big_block.len(), 1_381_836);
+        let big_block = black_box(big_block);
+
+        bh.iter(|| {
+            let mut reader = &big_block[..];
+            let block = Block::consensus_decode(&mut reader).unwrap();
+            black_box(&block);
+        });
+    }
+
+    #[bench]
+    pub fn bench_block_serialize(bh: &mut Bencher) {
+        let raw_block = include_bytes!("../../tests/data/mainnet_block_000000000000000000000c835b2adcaedc20fdf6ee440009c249452c726dafae.raw");
+
+        let block: Block = deserialize(&raw_block[..]).unwrap();
+
+        let mut data = Vec::with_capacity(raw_block.len());
+
+        bh.iter(|| {
+            let result = block.consensus_encode(&mut data);
+            black_box(&result);
+            data.clear();
+        });
+    }
+
+    #[bench]
+    pub fn bench_block_serialize_logic(bh: &mut Bencher) {
+        let raw_block = include_bytes!("../../tests/data/mainnet_block_000000000000000000000c835b2adcaedc20fdf6ee440009c249452c726dafae.raw");
+
+        let block: Block = deserialize(&raw_block[..]).unwrap();
+
+        bh.iter(|| {
+            let size = block.consensus_encode(&mut EmptyWrite);
+            black_box(&size);
+        });
+    }
+
+    #[bench]
+    pub fn bench_block_deserialize(bh: &mut Bencher) {
+        let raw_block = include_bytes!("../../tests/data/mainnet_block_000000000000000000000c835b2adcaedc20fdf6ee440009c249452c726dafae.raw");
+
+        bh.iter(|| {
+            let block: Block = deserialize(&raw_block[..]).unwrap();
+            black_box(&block);
+        });
+    }
+}
diff --git a/dash/src/blockdata/constants.rs b/dash/src/blockdata/constants.rs
new file mode 100644
index 000000000..71771de86
--- /dev/null
+++ b/dash/src/blockdata/constants.rs
@@ -0,0 +1,331 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+//! Blockdata constants.
+//!
+//! This module provides various constants relating to the blockchain and
+//! consensus code. In particular, it defines the genesis block and its
+//! single transaction.
+//!
+
+use core::default::Default;
+use hashes::{Hash, sha256d};
+use hex_lit::hex;
+use internals::impl_array_newtype;
+
+use crate::blockdata::block::{self, Block};
+use crate::blockdata::locktime::absolute;
+use crate::blockdata::opcodes::all::*;
+use crate::blockdata::script;
+use crate::blockdata::transaction::{outpoint::OutPoint, Transaction, txin::TxIn, txout::TxOut};
+use crate::blockdata::witness::Witness;
+use crate::internal_macros::impl_bytes_newtype;
+use crate::network::constants::Network;
+use crate::pow::CompactTarget;
+
+/// How many satoshis are in "one dash".
+pub const COIN_VALUE: u64 = 100_000_000;
+/// How many seconds between blocks we expect on average.
+pub const TARGET_BLOCK_SPACING: u32 = 600;
+/// How many blocks between diffchanges.
+pub const DIFFCHANGE_INTERVAL: u32 = 2016;
+/// How much time on average should occur between diffchanges.
+pub const DIFFCHANGE_TIMESPAN: u32 = 14 * 24 * 3600;
+/// The maximum allowed weight for a block, see BIP 141 (network rule).
+pub const MAX_BLOCK_WEIGHT: u32 = 4_000_000;
+/// The minimum transaction weight for a valid serialized transaction.
+pub const MIN_TRANSACTION_WEIGHT: u32 = 4 * 60;
+/// The factor that non-witness serialization data is multiplied by during weight calculation.
+pub const WITNESS_SCALE_FACTOR: usize = 4;
+/// The maximum allowed number of signature check operations in a block.
+pub const MAX_BLOCK_SIGOPS_COST: i64 = 80_000;
+/// Mainnet (dash) pubkey address prefix.
+pub const PUBKEY_ADDRESS_PREFIX_MAIN: u8 = 76;
+// 0x4C
+/// Mainnet (dash) script address prefix.
+pub const SCRIPT_ADDRESS_PREFIX_MAIN: u8 = 16;
+// 0x10
+/// Test (testnet, devnet, regtest) pubkey address prefix.
+pub const PUBKEY_ADDRESS_PREFIX_TEST: u8 = 140;
+// 0x8C
+/// Test (testnet, devnet, regtest) script address prefix.
+pub const SCRIPT_ADDRESS_PREFIX_TEST: u8 = 19;
+// 0x13
+/// The maximum allowed script size.
+pub const MAX_SCRIPT_ELEMENT_SIZE: usize = 520;
+/// How may blocks between halvings.
+pub const SUBSIDY_HALVING_INTERVAL: u32 = 210_000;
+/// Maximum allowed value for an integer in Script.
+pub const MAX_SCRIPTNUM_VALUE: u32 = 0x80000000;
+// 2^31
+/// Number of blocks needed for an output from a coinbase transaction to be spendable.
+pub const COINBASE_MATURITY: u32 = 100;
+
+/// The maximum value allowed in an output (useful for sanity checking,
+/// since keeping everything below this value should prevent overflows
+/// if you are doing anything remotely sane with monetary values).
+pub const MAX_MONEY: u64 = 21_000_000 * COIN_VALUE;
+
+/// Constructs and returns the coinbase (and only) transaction of the Bitcoin genesis block.
+fn bitcoin_genesis_tx() -> Transaction {
+    // Base
+    let mut ret = Transaction {
+        version: 1,
+        lock_time: absolute::LockTime::ZERO.to_consensus_u32(),
+        input: vec![],
+        output: vec![],
+        special_transaction_payload: None,
+    };
+
+    // Inputs
+    let in_script = script::Builder::new()
+        .push_int(486604799)
+        .push_int_non_minimal(4)
+        .push_slice(b"The Times 03/Jan/2009 Chancellor on brink of second bailout for banks")
+        .into_script();
+    ret.input.push(TxIn {
+        previous_output: OutPoint::null(),
+        script_sig: in_script,
+        sequence: 0xFFFFFFFF,
+        witness: Witness::default(),
+    });
+
+    // Outputs
+    let script_bytes = hex!("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f");
+    let out_script =
+        script::Builder::new().push_slice(script_bytes).push_opcode(OP_CHECKSIG).into_script();
+    ret.output.push(TxOut { value: 50 * COIN_VALUE, script_pubkey: out_script });
+
+    // end
+    ret
+}
+
+/// Constructs and returns the genesis block.
+pub fn genesis_block(network: Network) -> Block {
+    let txdata = vec![bitcoin_genesis_tx()];
+    let hash: sha256d::Hash = txdata[0].txid().into();
+    let merkle_root = hash.into();
+    match network {
+        Network::Dash => Block {
+            header: block::Header {
+                version: block::Version::ONE,
+                prev_blockhash: Hash::all_zeros(),
+                merkle_root,
+                time: 1231006505,
+                bits: CompactTarget::from_consensus(0x1d00ffff),
+                nonce: 2083236893,
+            },
+            txdata,
+        },
+        Network::Testnet => Block {
+            header: block::Header {
+                version: block::Version::ONE,
+                prev_blockhash: Hash::all_zeros(),
+                merkle_root,
+                time: 1296688602,
+                bits: CompactTarget::from_consensus(0x1d00ffff),
+                nonce: 414098458,
+            },
+            txdata,
+        },
+        Network::Devnet => Block {
+            header: block::Header {
+                version: block::Version::ONE,
+                prev_blockhash: Hash::all_zeros(),
+                merkle_root,
+                time: 1598918400,
+                bits: CompactTarget::from_consensus(0x1e0377ae),
+                nonce: 52613770,
+            },
+            txdata,
+        },
+        Network::Regtest => Block {
+            header: block::Header {
+                version: block::Version::ONE,
+                prev_blockhash: Hash::all_zeros(),
+                merkle_root,
+                time: 1296688602,
+                bits: CompactTarget::from_consensus(0x207fffff),
+                nonce: 2,
+            },
+            txdata,
+        },
+    }
+}
+
+/// The uniquely identifying hash of the target blockchain.
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct ChainHash([u8; 32]);
+impl_array_newtype!(ChainHash, u8, 32);
+impl_bytes_newtype!(ChainHash, 32);
+
+impl ChainHash {
+    // Mainnet value can be verified at https://github.com/lightning/bolts/blob/master/00-introduction.md
+    /// `ChainHash` for mainnet dash.
+    pub const DASH: Self = Self([
+        4, 56, 21, 192, 10, 42, 23, 242, 90, 219, 163, 1, 98, 89, 58, 167, 5, 4, 25, 91, 183, 218, 230, 227, 167, 85, 39, 96, 51, 189, 13, 217
+    ]);
+    /// `ChainHash` for testnet dash.
+    pub const TESTNET: Self = Self([
+        16, 238, 202, 52, 44, 112, 187, 96, 147, 134, 134, 75, 156, 55, 90, 205, 70, 74, 202, 97, 112, 87, 40, 133, 32, 84, 236, 123, 183, 28, 220, 240
+    ]);
+    /// `ChainHash` for devnet dash.
+    pub const DEVNET: Self = Self([
+        164, 119, 85, 190, 121, 37, 150, 111, 131, 181, 177, 164, 204, 209, 202, 105, 29, 197, 235, 240, 250, 179, 224, 6, 46, 238, 40, 136, 23, 215, 12, 88
+    ]);
+    /// `ChainHash` for regtest dash.
+    pub const REGTEST: Self = Self([
+        16, 251, 76, 138, 72, 44, 63, 251, 228, 123, 87, 245, 131, 191, 84, 111, 117, 107, 92, 205, 105, 10, 247, 249, 131, 113, 112, 200, 29, 102, 142, 242
+    ]);
+
+    /// Returns the hash of the `network` genesis block for use as a chain hash.
+    ///
+    /// See [BOLT 0](https://github.com/lightning/bolts/blob/ffeece3dab1c52efdb9b53ae476539320fa44938/00-introduction.md#chain_hash)
+    /// for specification.
+    pub const fn using_genesis_block(network: Network) -> Self {
+        let hashes = [Self::DASH, Self::TESTNET, Self::DEVNET, Self::REGTEST];
+        hashes[network as usize]
+    }
+
+    /// Converts genesis block hash into `ChainHash`.
+    pub fn from_genesis_block_hash(block_hash: crate::BlockHash) -> Self {
+        ChainHash(block_hash.to_byte_array())
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::consensus::encode::serialize;
+    use crate::internal_macros::hex;
+    use crate::network::constants::Network;
+
+    #[test]
+    fn bitcoin_genesis_first_transaction() {
+        let gen = bitcoin_genesis_tx();
+
+        assert_eq!(gen.version, 1);
+        assert_eq!(gen.input.len(), 1);
+        assert_eq!(gen.input[0].previous_output.txid, Hash::all_zeros());
+        assert_eq!(gen.input[0].previous_output.vout, 0xFFFFFFFF);
+        assert_eq!(serialize(&gen.input[0].script_sig),
+                   hex!("4d04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73"));
+
+        assert_eq!(gen.input[0].sequence, u32::MAX);
+        assert_eq!(gen.output.len(), 1);
+        assert_eq!(serialize(&gen.output[0].script_pubkey),
+                   hex!("434104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac"));
+        assert_eq!(gen.output[0].value, 50 * COIN_VALUE);
+        assert_eq!(gen.lock_time, 0);
+
+        assert_eq!(
+            gen.wtxid().to_string(),
+            "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"
+        );
+    }
+
+    #[test]
+    fn bitcoin_genesis_full_block() {
+        let gen = genesis_block(Network::Dash);
+
+        assert_eq!(gen.header.version, block::Version::ONE);
+        assert_eq!(gen.header.prev_blockhash, Hash::all_zeros());
+        assert_eq!(
+            gen.header.merkle_root.to_string(),
+            "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"
+        );
+
+        assert_eq!(gen.header.time, 1231006505);
+        assert_eq!(gen.header.bits, CompactTarget::from_consensus(0x1d00ffff));
+        assert_eq!(gen.header.nonce, 2083236893);
+        assert_eq!(
+            gen.header.block_hash().to_string(),
+            "043815c00a2a17f25adba30162593aa70504195bb7dae6e3a755276033bd0dd9"
+        );
+    }
+
+    #[test]
+    fn testnet_genesis_full_block() {
+        let gen = genesis_block(Network::Testnet);
+        assert_eq!(gen.header.version, block::Version::ONE);
+        assert_eq!(gen.header.prev_blockhash, Hash::all_zeros());
+        assert_eq!(
+            gen.header.merkle_root.to_string(),
+            "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"
+        );
+        assert_eq!(gen.header.time, 1296688602);
+        assert_eq!(gen.header.bits, CompactTarget::from_consensus(0x1d00ffff));
+        assert_eq!(gen.header.nonce, 414098458);
+        assert_eq!(
+            gen.header.block_hash().to_string(),
+            "10eeca342c70bb609386864b9c375acd464aca61705728852054ec7bb71cdcf0"
+        );
+    }
+
+    #[test]
+    fn devnet_genesis_full_block() {
+        let gen = genesis_block(Network::Devnet);
+        assert_eq!(gen.header.version, block::Version::ONE);
+        assert_eq!(gen.header.prev_blockhash, Hash::all_zeros());
+        assert_eq!(
+            gen.header.merkle_root.to_string(),
+            "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"
+        );
+        assert_eq!(gen.header.time, 1598918400);
+        assert_eq!(gen.header.bits, CompactTarget::from_consensus(0x1e0377ae));
+        assert_eq!(gen.header.nonce, 52613770);
+        assert_eq!(
+            gen.header.block_hash().to_string(),
+            "a47755be7925966f83b5b1a4ccd1ca691dc5ebf0fab3e0062eee288817d70c58"
+        );
+    }
+
+    // The *_chain_hash tests are sanity/regression tests, they verify that the const byte array
+    // representing the genesis block is the same as that created by hashing the genesis block.
+    fn chain_hash_and_genesis_block(network: Network) {
+        // The genesis block hash is a double-sha256 and it is displayed backwards.
+        let genesis_hash = genesis_block(network).block_hash();
+        let want = format!("{:02x}", genesis_hash);
+
+        let chain_hash = ChainHash::using_genesis_block(network);
+        let got = format!("{:02x}", chain_hash);
+
+        // Compare strings because the spec specifically states how the chain hash must encode to hex.
+        assert_eq!(got, want);
+
+        #[allow(unreachable_patterns)] // This is specifically trying to catch later added variants.
+        match network {
+            Network::Dash => {}
+            Network::Testnet => {}
+            Network::Devnet => {}
+            Network::Regtest => {}
+            _ => panic!("Update ChainHash::using_genesis_block and chain_hash_genesis_block with new variants"),
+        }
+    }
+
+    macro_rules! chain_hash_genesis_block {
+        ($($test_name:ident, $network:expr);* $(;)*) => {
+            $(
+                #[test]
+                fn $test_name() {
+                    chain_hash_and_genesis_block($network);
+                }
+            )*
+        }
+    }
+
+    chain_hash_genesis_block! {
+        mainnet_chain_hash_genesis_block, Network::Dash;
+        testnet_chain_hash_genesis_block, Network::Testnet;
+        devnet_chain_hash_genesis_block, Network::Devnet;
+        regtest_chain_hash_genesis_block, Network::Regtest;
+    }
+
+    // Test vector taken from: https://github.com/lightning/bolts/blob/master/00-introduction.md
+    #[test]
+    fn mainnet_chain_hash_test_vector() {
+        let got = ChainHash::using_genesis_block(Network::Dash).to_string();
+        let want = "043815c00a2a17f25adba30162593aa70504195bb7dae6e3a755276033bd0dd9";
+        assert_eq!(got, want);
+    }
+}
diff --git a/dash/src/blockdata/fee_rate.rs b/dash/src/blockdata/fee_rate.rs
new file mode 100644
index 000000000..a0686bdaf
--- /dev/null
+++ b/dash/src/blockdata/fee_rate.rs
@@ -0,0 +1,182 @@
+//! Implements `FeeRate` and assoctiated features.
+
+use core::fmt;
+use core::ops::{Div, Mul};
+
+use super::Weight;
+use crate::prelude::*;
+use crate::Amount;
+
+/// Represents fee rate.
+///
+/// This is an integer newtype representing fee rate in `sat/kwu`. It provides protection against mixing
+/// up the types as well as basic formatting features.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+#[cfg_attr(feature = "serde", serde(transparent))]
+pub struct FeeRate(u64);
+
+impl FeeRate {
+    /// 0 sat/kwu.
+    ///
+    /// Equivalent to [`MIN`](Self::MIN), may better express intent in some contexts.
+    pub const ZERO: FeeRate = FeeRate(0);
+
+    /// Minimum possible value (0 sat/kwu).
+    ///
+    /// Equivalent to [`ZERO`](Self::ZERO), may better express intent in some contexts.
+    pub const MIN: FeeRate = FeeRate(u64::min_value());
+
+    /// Maximum possible value.
+    pub const MAX: FeeRate = FeeRate(u64::max_value());
+
+    /// Minimum fee rate required to broadcast a transaction.
+    ///
+    /// The value matches the default Bitcoin Core policy at the time of library release.
+    pub const BROADCAST_MIN: FeeRate = FeeRate::from_sat_per_vb_unchecked(1);
+
+    /// Fee rate used to compute dust amount.
+    pub const DUST: FeeRate = FeeRate::from_sat_per_vb_unchecked(3);
+
+    /// Constructs `FeeRate` from satoshis per 1000 weight units.
+    pub const fn from_sat_per_kwu(sat_kwu: u64) -> Self { FeeRate(sat_kwu) }
+
+    /// Constructs `FeeRate` from satoshis per virtual bytes.
+    ///
+    /// # Errors
+    ///
+    /// Returns `None` on arithmetic overflow.
+    pub fn from_sat_per_vb(sat_vb: u64) -> Option<Self> {
+        // 1 vb == 4 wu
+        // 1 sat/vb == 1/4 sat/wu
+        // sat_vb sat/vb * 1000 / 4 == sat/kwu
+        Some(FeeRate(sat_vb.checked_mul(1000 / 4)?))
+    }
+
+    /// Constructs `FeeRate` from satoshis per virtual bytes without overflow check.
+    pub const fn from_sat_per_vb_unchecked(sat_vb: u64) -> Self { FeeRate(sat_vb * (1000 / 4)) }
+
+    /// Returns raw fee rate.
+    ///
+    /// Can be used instead of `into()` to avoid inference issues.
+    pub const fn to_sat_per_kwu(self) -> u64 { self.0 }
+
+    /// Converts to sat/vB rounding down.
+    pub const fn to_sat_per_vb_floor(self) -> u64 { self.0 / (1000 / 4) }
+
+    /// Converts to sat/vB rounding up.
+    pub const fn to_sat_per_vb_ceil(self) -> u64 { (self.0 + (1000 / 4 - 1)) / (1000 / 4) }
+
+    /// Checked multiplication.
+    ///
+    /// Computes `self * rhs` returning `None` if overflow occurred.
+    pub fn checked_mul(self, rhs: u64) -> Option<Self> { self.0.checked_mul(rhs).map(Self) }
+
+    /// Checked division.
+    ///
+    /// Computes `self / rhs` returning `None` if `rhs == 0`.
+    pub fn checked_div(self, rhs: u64) -> Option<Self> { self.0.checked_div(rhs).map(Self) }
+}
+
+/// Alternative will display the unit.
+impl fmt::Display for FeeRate {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        if f.alternate() {
+            write!(f, "{} sat/kwu", self.0)
+        } else {
+            fmt::Display::fmt(&self.0, f)
+        }
+    }
+}
+
+impl From<FeeRate> for u64 {
+    fn from(value: FeeRate) -> Self { value.to_sat_per_kwu() }
+}
+
+/// Computes ceiling so that fee computation is conservative.
+impl Mul<FeeRate> for Weight {
+    type Output = Amount;
+
+    fn mul(self, rhs: FeeRate) -> Self::Output {
+        Amount::from_sat((rhs.to_sat_per_kwu() * self.to_wu() + 999) / 1000)
+    }
+}
+
+impl Mul<Weight> for FeeRate {
+    type Output = Amount;
+
+    fn mul(self, rhs: Weight) -> Self::Output { rhs * self }
+}
+
+impl Div<Weight> for Amount {
+    type Output = FeeRate;
+
+    fn div(self, rhs: Weight) -> Self::Output { FeeRate(self.to_sat() * 1000 / rhs.to_wu()) }
+}
+
+crate::parse::impl_parse_str_from_int_infallible!(FeeRate, u64, from_sat_per_kwu);
+
+#[cfg(test)]
+mod tests {
+    use std::u64;
+
+    use super::*;
+
+    #[test]
+    fn fee_rate_const_test() {
+        assert_eq!(0, FeeRate::ZERO.to_sat_per_kwu());
+        assert_eq!(u64::min_value(), FeeRate::MIN.to_sat_per_kwu());
+        assert_eq!(u64::max_value(), FeeRate::MAX.to_sat_per_kwu());
+        assert_eq!(250, FeeRate::BROADCAST_MIN.to_sat_per_kwu());
+        assert_eq!(750, FeeRate::DUST.to_sat_per_kwu());
+    }
+
+    #[test]
+    fn fee_rate_from_sat_per_vb_test() {
+        let fee_rate = FeeRate::from_sat_per_vb(10).expect("expected feerate in sat/kwu");
+        assert_eq!(FeeRate(2500), fee_rate);
+    }
+
+    #[test]
+    fn fee_rate_from_sat_per_vb_overflow_test() {
+        let fee_rate = FeeRate::from_sat_per_vb(u64::MAX);
+        assert!(fee_rate.is_none());
+    }
+
+    #[test]
+    fn from_sat_per_vb_unchecked_test() {
+        let fee_rate = FeeRate::from_sat_per_vb_unchecked(10);
+        assert_eq!(FeeRate(2500), fee_rate);
+    }
+
+    #[test]
+    #[should_panic]
+    fn from_sat_per_vb_unchecked_panic_test() { FeeRate::from_sat_per_vb_unchecked(u64::MAX); }
+
+    #[test]
+    fn raw_feerate_test() {
+        let fee_rate = FeeRate(333);
+        assert_eq!(333, fee_rate.to_sat_per_kwu());
+        assert_eq!(1, fee_rate.to_sat_per_vb_floor());
+        assert_eq!(2, fee_rate.to_sat_per_vb_ceil());
+    }
+
+    #[test]
+    fn checked_mul_test() {
+        let fee_rate = FeeRate(10).checked_mul(10).expect("expected feerate in sat/kwu");
+        assert_eq!(FeeRate(100), fee_rate);
+
+        let fee_rate = FeeRate(10).checked_mul(u64::MAX);
+        assert!(fee_rate.is_none());
+    }
+
+    #[test]
+    fn checked_div_test() {
+        let fee_rate = FeeRate(10).checked_div(10).expect("expected feerate in sat/kwu");
+        assert_eq!(FeeRate(1), fee_rate);
+
+        let fee_rate = FeeRate(10).checked_div(0);
+        assert!(fee_rate.is_none());
+    }
+}
diff --git a/dash/src/blockdata/locktime/absolute.rs b/dash/src/blockdata/locktime/absolute.rs
new file mode 100644
index 000000000..394290a83
--- /dev/null
+++ b/dash/src/blockdata/locktime/absolute.rs
@@ -0,0 +1,824 @@
+// Rust Bitcoin Library - Written by the rust-dash developers.
+// SPDX-License-Identifier: CC0-1.0
+
+//! Provides type [`LockTime`] that implements the logic around nLockTime/OP_CHECKLOCKTIMEVERIFY.
+//!
+//! There are two types of lock time: lock-by-blockheight and lock-by-blocktime, distinguished by
+//! whether `LockTime < LOCKTIME_THRESHOLD`.
+//!
+
+use core::cmp::{Ordering, PartialOrd};
+use core::{fmt, mem};
+
+use internals::write_err;
+#[cfg(all(test, mutate))]
+use mutagen::mutate;
+
+#[cfg(doc)]
+use crate::absolute;
+use crate::consensus::encode::{self, Decodable, Encodable};
+use crate::error::ParseIntError;
+use crate::io::{self, Read, Write};
+use crate::parse::{impl_parse_str_from_int_fallible, impl_parse_str_from_int_infallible};
+use crate::prelude::*;
+use crate::string::FromHexStr;
+
+/// The Threshold for deciding whether a lock time value is a height or a time (see [Bitcoin Core]).
+///
+/// `LockTime` values _below_ the threshold are interpreted as block heights, values _above_ (or
+/// equal to) the threshold are interpreted as block times (UNIX timestamp, seconds since epoch).
+///
+/// Bitcoin is able to safely use this value because a block height greater than 500,000,000 would
+/// never occur because it would represent a height in approximately 9500 years. Conversely, block
+/// times under 500,000,000 will never happen because they would represent times before 1986 which
+/// are, for obvious reasons, not useful within the Bitcoin network.
+///
+/// [Bitcoin Core]: https://github.com/bitcoin/bitcoin/blob/9ccaee1d5e2e4b79b0a7c29aadb41b97e4741332/src/script/script.h#L39
+pub const LOCK_TIME_THRESHOLD: u32 = 500_000_000;
+
+/// An absolute lock time value, representing either a block height or a UNIX timestamp (seconds
+/// since epoch).
+///
+/// Used for transaction lock time (`nLockTime` in Bitcoin Core and [`crate::Transaction::lock_time`]
+/// in this library) and also for the argument to opcode 'OP_CHECKLOCKTIMEVERIFY`.
+///
+/// ### Note on ordering
+///
+/// Because locktimes may be height- or time-based, and these metrics are incommensurate, there
+/// is no total ordering on locktimes. We therefore have implemented [`PartialOrd`] but not [`Ord`].
+/// For [`crate::Transaction`], which has a locktime field, we implement a total ordering to make
+/// it easy to store transactions in sorted data structures, and use the locktime's 32-bit integer
+/// consensus encoding to order it.
+///
+/// ### Relevant BIPs
+///
+/// * [BIP-65 OP_CHECKLOCKTIMEVERIFY](https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki)
+/// * [BIP-113 Median time-past as endpoint for lock-time calculations](https://github.com/bitcoin/bips/blob/master/bip-0113.mediawiki)
+///
+/// # Examples
+/// ```
+/// # use dashcore::absolute::{LockTime, LockTime::*};
+/// # let n = LockTime::from_consensus(741521);          // n OP_CHECKLOCKTIMEVERIFY
+/// # let lock_time = LockTime::from_consensus(741521);  // nLockTime
+/// // To compare absolute lock times there are various `is_satisfied_*` methods, you may also use:
+/// let is_satisfied = match (n, lock_time) {
+///     (Blocks(n), Blocks(lock_time)) => n <= lock_time,
+///     (Seconds(n), Seconds(lock_time)) => n <= lock_time,
+///     _ => panic!("handle invalid comparison error"),
+/// };
+/// ```
+#[allow(clippy::derive_ord_xor_partial_ord)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum LockTime {
+    /// A block height lock time value.
+    ///
+    /// # Examples
+    /// ```rust
+    /// use dashcore::absolute::LockTime;
+    ///
+    /// let block: u32 = 741521;
+    /// let n = LockTime::from_height(block).expect("valid height");
+    /// assert!(n.is_block_height());
+    /// assert_eq!(n.to_consensus_u32(), block);
+    /// ```
+    Blocks(Height),
+    /// A UNIX timestamp lock time value.
+    ///
+    /// # Examples
+    /// ```rust
+    /// use dashcore::absolute::LockTime;
+    ///
+    /// let seconds: u32 = 1653195600; // May 22nd, 5am UTC.
+    /// let n = LockTime::from_time(seconds).expect("valid time");
+    /// assert!(n.is_block_time());
+    /// assert_eq!(n.to_consensus_u32(), seconds);
+    /// ```
+    Seconds(Time),
+}
+
+impl LockTime {
+    /// If [`crate::Transaction::lock_time`] is set to zero it is ignored, in other words a
+    /// transaction with nLocktime==0 is able to be included immediately in any block.
+    pub const ZERO: LockTime = LockTime::Blocks(Height::ZERO);
+
+    /// Constructs a `LockTime` from an nLockTime value or the argument to OP_CHEKCLOCKTIMEVERIFY.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// # use dashcore::absolute::LockTime;
+    /// # let n = LockTime::from_consensus(741521); // n OP_CHECKLOCKTIMEVERIFY
+    ///
+    /// // `from_consensus` roundtrips as expected with `to_consensus_u32`.
+    /// let n_lock_time: u32 = 741521;
+    /// let lock_time = LockTime::from_consensus(n_lock_time);
+    /// assert_eq!(lock_time.to_consensus_u32(), n_lock_time);
+    #[inline]
+    pub fn from_consensus(n: u32) -> Self {
+        if is_block_height(n) {
+            Self::Blocks(Height::from_consensus(n).expect("n is valid"))
+        } else {
+            Self::Seconds(Time::from_consensus(n).expect("n is valid"))
+        }
+    }
+
+    /// Constructs a `LockTime` from `n`, expecting `n` to be a valid block height.
+    ///
+    /// See [`LOCK_TIME_THRESHOLD`] for definition of a valid height value.
+    ///
+    /// # Examples
+    /// ```rust
+    /// # use dashcore::absolute::LockTime;
+    /// assert!(LockTime::from_height(741521).is_ok());
+    /// assert!(LockTime::from_height(1653195600).is_err());
+    /// ```
+    #[inline]
+    pub fn from_height(n: u32) -> Result<Self, Error> {
+        let height = Height::from_consensus(n)?;
+        Ok(LockTime::Blocks(height))
+    }
+
+    /// Constructs a `LockTime` from `n`, expecting `n` to be a valid block time.
+    ///
+    /// See [`LOCK_TIME_THRESHOLD`] for definition of a valid time value.
+    ///
+    /// # Examples
+    /// ```rust
+    /// # use dashcore::absolute::LockTime;
+    /// assert!(LockTime::from_time(1653195600).is_ok());
+    /// assert!(LockTime::from_time(741521).is_err());
+    /// ```
+    #[inline]
+    pub fn from_time(n: u32) -> Result<Self, Error> {
+        let time = Time::from_consensus(n)?;
+        Ok(LockTime::Seconds(time))
+    }
+
+    /// Returns true if both lock times use the same unit i.e., both height based or both time based.
+    #[inline]
+    pub fn is_same_unit(&self, other: LockTime) -> bool {
+        mem::discriminant(self) == mem::discriminant(&other)
+    }
+
+    /// Returns true if this lock time value is a block height.
+    #[inline]
+    pub fn is_block_height(&self) -> bool {
+        match *self {
+            LockTime::Blocks(_) => true,
+            LockTime::Seconds(_) => false,
+        }
+    }
+
+    /// Returns true if this lock time value is a block time (UNIX timestamp).
+    #[inline]
+    pub fn is_block_time(&self) -> bool { !self.is_block_height() }
+
+    /// Returns true if this timelock constraint is satisfied by the respective `height`/`time`.
+    ///
+    /// If `self` is a blockheight based lock then it is checked against `height` and if `self` is a
+    /// blocktime based lock it is checked against `time`.
+    ///
+    /// A 'timelock constraint' refers to the `n` from `n OP_CHEKCLOCKTIMEVERIFY`, this constraint
+    /// is satisfied if a transaction with nLockTime ([`crate::Transaction::lock_time`]) set to
+    /// `height`/`time` is valid.
+    ///
+    /// # Examples
+    /// ```no_run
+    /// # use dashcore::absolute::{LockTime, Height, Time};
+    /// // Can be implemented if block chain data is available.
+    /// fn get_height() -> Height { todo!("return the current block height") }
+    /// fn get_time() -> Time { todo!("return the current block time") }
+    ///
+    /// let n = LockTime::from_consensus(741521); // `n OP_CHEKCLOCKTIMEVERIFY`.
+    /// if n.is_satisfied_by(get_height(), get_time()) {
+    ///     // Can create and mine a transaction that satisfies the OP_CLTV timelock constraint.
+    /// }
+    /// ````
+    #[inline]
+    #[cfg_attr(all(test, mutate), mutate)]
+    pub fn is_satisfied_by(&self, height: Height, time: Time) -> bool {
+        use LockTime::*;
+
+        match *self {
+            Blocks(n) => n <= height,
+            Seconds(n) => n <= time,
+        }
+    }
+
+    /// Returns true if satisfaction of `other` lock time implies satisfaction of this
+    /// [`absolute::LockTime`].
+    ///
+    /// A lock time can only be satisfied by n blocks being mined or n seconds passing. If you have
+    /// two lock times (same unit) then the larger lock time being satisfied implies (in a
+    /// mathematical sense) the smaller one being satisfied.
+    ///
+    /// This function is useful if you wish to check a lock time against various other locks e.g.,
+    /// filtering out locks which cannot be satisfied. Can also be used to remove the smaller value
+    /// of two `OP_CHECKLOCKTIMEVERIFY` operations within one branch of the script.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// # use dashcore::absolute::{LockTime, LockTime::*};
+    /// let lock_time = LockTime::from_consensus(741521);
+    /// let check = LockTime::from_consensus(741521 + 1);
+    /// assert!(lock_time.is_implied_by(check));
+    /// ```
+    #[inline]
+    #[cfg_attr(all(test, mutate), mutate)]
+    pub fn is_implied_by(&self, other: LockTime) -> bool {
+        use LockTime::*;
+
+        match (*self, other) {
+            (Blocks(this), Blocks(other)) => this <= other,
+            (Seconds(this), Seconds(other)) => this <= other,
+            _ => false, // Not the same units.
+        }
+    }
+
+    /// Returns the inner `u32` value. This is the value used when creating this `LockTime`
+    /// i.e., `n OP_CHECKLOCKTIMEVERIFY` or nLockTime.
+    ///
+    /// # Warning
+    ///
+    /// Do not compare values return by this method. The whole point of the `LockTime` type is to
+    /// assist in doing correct comparisons. Either use `is_satisfied_by`, `is_satisfied_by_lock`,
+    /// or use the pattern below:
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// # use dashcore::absolute::{LockTime, LockTime::*};
+    /// # let n = LockTime::from_consensus(741521);              // n OP_CHECKLOCKTIMEVERIFY
+    /// # let lock_time = LockTime::from_consensus(741521 + 1);  // nLockTime
+    ///
+    /// let is_satisfied = match (n, lock_time) {
+    ///     (Blocks(n), Blocks(lock_time)) => n <= lock_time,
+    ///     (Seconds(n), Seconds(lock_time)) => n <= lock_time,
+    ///     _ => panic!("invalid comparison"),
+    /// };
+    ///
+    /// // Or, if you have Rust 1.53 or greater
+    /// // let is_satisfied = n.partial_cmp(&lock_time).expect("invalid comparison").is_le();
+    /// ```
+    #[inline]
+    pub fn to_consensus_u32(self) -> u32 {
+        match self {
+            LockTime::Blocks(ref h) => h.to_consensus_u32(),
+            LockTime::Seconds(ref t) => t.to_consensus_u32(),
+        }
+    }
+}
+
+impl_parse_str_from_int_infallible!(LockTime, u32, from_consensus);
+
+impl From<Height> for LockTime {
+    #[inline]
+    fn from(h: Height) -> Self { LockTime::Blocks(h) }
+}
+
+impl From<Time> for LockTime {
+    #[inline]
+    fn from(t: Time) -> Self { LockTime::Seconds(t) }
+}
+
+impl PartialOrd for LockTime {
+    #[inline]
+    fn partial_cmp(&self, other: &LockTime) -> Option<Ordering> {
+        use LockTime::*;
+
+        match (*self, *other) {
+            (Blocks(ref a), Blocks(ref b)) => a.partial_cmp(b),
+            (Seconds(ref a), Seconds(ref b)) => a.partial_cmp(b),
+            (_, _) => None,
+        }
+    }
+}
+
+impl fmt::Display for LockTime {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use LockTime::*;
+
+        if f.alternate() {
+            match *self {
+                Blocks(ref h) => write!(f, "block-height {}", h),
+                Seconds(ref t) => write!(f, "block-time {} (seconds since epoch)", t),
+            }
+        } else {
+            match *self {
+                Blocks(ref h) => fmt::Display::fmt(h, f),
+                Seconds(ref t) => fmt::Display::fmt(t, f),
+            }
+        }
+    }
+}
+
+impl FromHexStr for LockTime {
+    type Error = Error;
+
+    #[inline]
+    fn from_hex_str_no_prefix<S: AsRef<str> + Into<String>>(s: S) -> Result<Self, Self::Error> {
+        let packed_lock_time = crate::parse::hex_u32(s)?;
+        Ok(Self::from_consensus(packed_lock_time))
+    }
+}
+
+impl Encodable for LockTime {
+    #[inline]
+    fn consensus_encode<W: Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let v = self.to_consensus_u32();
+        v.consensus_encode(w)
+    }
+}
+
+impl Decodable for LockTime {
+    #[inline]
+    fn consensus_decode<R: Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        u32::consensus_decode(r).map(LockTime::from_consensus)
+    }
+}
+
+#[cfg(feature = "serde")]
+impl serde::Serialize for LockTime {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        serializer.serialize_u32(self.to_consensus_u32())
+    }
+}
+
+#[cfg(feature = "serde")]
+impl<'de> serde::Deserialize<'de> for LockTime {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        struct Visitor;
+        impl<'de> serde::de::Visitor<'de> for Visitor {
+            type Value = u32;
+            fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result { f.write_str("a u32") }
+            // We cannot just implement visit_u32 because JSON (among other things) always
+            // calls visit_u64, even when called from Deserializer::deserialize_u32. The
+            // other visit_u*s have default implementations that forward to visit_u64.
+            fn visit_u64<E: serde::de::Error>(self, v: u64) -> Result<u32, E> {
+                v.try_into().map_err(|_| {
+                    E::invalid_value(serde::de::Unexpected::Unsigned(v), &"a 32-bit number")
+                })
+            }
+            // Also do the signed version, just for good measure.
+            fn visit_i64<E: serde::de::Error>(self, v: i64) -> Result<u32, E> {
+                v.try_into().map_err(|_| {
+                    E::invalid_value(serde::de::Unexpected::Signed(v), &"a 32-bit number")
+                })
+            }
+        }
+        deserializer.deserialize_u32(Visitor).map(LockTime::from_consensus)
+    }
+}
+
+/// An absolute block height, guaranteed to always contain a valid height value.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Height(u32);
+
+impl Height {
+    /// Absolute block height 0, the genesis block.
+    pub const ZERO: Self = Height(0);
+
+    /// The minimum absolute block height (0), the genesis block.
+    pub const MIN: Self = Self::ZERO;
+
+    /// The maximum absolute block height.
+    pub const MAX: Self = Height(LOCK_TIME_THRESHOLD - 1);
+
+    /// The minimum absolute block height (0), the genesis block.
+    ///
+    /// This is provided for consistency with Rust 1.41.1, newer code should use [`Height::MIN`].
+    pub const fn min_value() -> Self { Self::MIN }
+
+    /// The maximum absolute block height.
+    ///
+    /// This is provided for consistency with Rust 1.41.1, newer code should use [`Height::MAX`].
+    pub const fn max_value() -> Self { Self::MAX }
+
+    /// Constructs a new block height.
+    ///
+    /// # Errors
+    ///
+    /// If `n` does not represent a block height value (see documentation on [`LockTime`]).
+    ///
+    /// # Examples
+    /// ```rust
+    /// use crate::dashcore::locktime::absolute::Height;
+    ///
+    /// let h: u32 = 741521;
+    /// let height = Height::from_consensus(h).expect("invalid height value");
+    /// assert_eq!(height.to_consensus_u32(), h);
+    /// ```
+    #[inline]
+    pub fn from_consensus(n: u32) -> Result<Height, Error> {
+        if is_block_height(n) {
+            Ok(Self(n))
+        } else {
+            Err(ConversionError::invalid_height(n).into())
+        }
+    }
+
+    /// Converts this `Height` to its inner `u32` value.
+    ///
+    /// # Examples
+    /// ```rust
+    /// use dashcore::absolute::LockTime;
+    ///
+    /// let n_lock_time: u32 = 741521;
+    /// let lock_time = LockTime::from_consensus(n_lock_time);
+    /// assert!(lock_time.is_block_height());
+    /// assert_eq!(lock_time.to_consensus_u32(), n_lock_time);
+    #[inline]
+    pub fn to_consensus_u32(self) -> u32 { self.0 }
+}
+
+impl_parse_str_from_int_fallible!(Height, u32, from_consensus, Error);
+
+impl fmt::Display for Height {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(&self.0, f) }
+}
+
+impl FromHexStr for Height {
+    type Error = Error;
+
+    #[inline]
+    fn from_hex_str_no_prefix<S: AsRef<str> + Into<String>>(s: S) -> Result<Self, Self::Error> {
+        let height = crate::parse::hex_u32(s)?;
+        Self::from_consensus(height)
+    }
+}
+
+/// A UNIX timestamp, seconds since epoch, guaranteed to always contain a valid time value.
+///
+/// Note that there is no manipulation of the inner value during construction or when using
+/// `to_consensus_u32()`. Said another way, `Time(x)` means 'x seconds since epoch' _not_ '(x -
+/// threshold) seconds since epoch'.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Time(u32);
+
+impl Time {
+    /// The minimum absolute block time (Tue Nov 05 1985 00:53:20 GMT+0000).
+    pub const MIN: Self = Time(LOCK_TIME_THRESHOLD);
+
+    /// The maximum absolute block time (Sun Feb 07 2106 06:28:15 GMT+0000).
+    pub const MAX: Self = Time(u32::max_value());
+
+    /// The minimum absolute block time.
+    ///
+    /// This is provided for consistency with Rust 1.41.1, newer code should use [`Time::MIN`].
+    pub const fn min_value() -> Self { Self::MIN }
+
+    /// The maximum absolute block time.
+    ///
+    /// This is provided for consistency with Rust 1.41.1, newer code should use [`Time::MAX`].
+    pub const fn max_value() -> Self { Self::MAX }
+
+    /// Constructs a new block time.
+    ///
+    /// # Errors
+    ///
+    /// If `n` does not encode a UNIX time stamp (see documentation on [`LockTime`]).
+    ///
+    /// # Examples
+    /// ```rust
+    /// use dashcore::locktime::absolute::Time;
+    ///
+    /// let t: u32 = 1653195600; // May 22nd, 5am UTC.
+    /// let time = Time::from_consensus(t).expect("invalid time value");
+    /// assert_eq!(time.to_consensus_u32(), t);
+    /// ```
+    #[inline]
+    pub fn from_consensus(n: u32) -> Result<Time, Error> {
+        if is_block_time(n) {
+            Ok(Self(n))
+        } else {
+            Err(ConversionError::invalid_time(n).into())
+        }
+    }
+
+    /// Converts this `Time` to its inner `u32` value.
+    ///
+    /// # Examples
+    /// ```rust
+    /// use dashcore::absolute::LockTime;
+    ///
+    /// let n_lock_time: u32 = 1653195600; // May 22nd, 5am UTC.
+    /// let lock_time = LockTime::from_consensus(n_lock_time);
+    /// assert_eq!(lock_time.to_consensus_u32(), n_lock_time);
+    /// ```
+    #[inline]
+    pub fn to_consensus_u32(self) -> u32 { self.0 }
+}
+
+impl_parse_str_from_int_fallible!(Time, u32, from_consensus, Error);
+
+impl fmt::Display for Time {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(&self.0, f) }
+}
+
+impl FromHexStr for Time {
+    type Error = Error;
+
+    #[inline]
+    fn from_hex_str_no_prefix<S: AsRef<str> + Into<String>>(s: S) -> Result<Self, Self::Error> {
+        let time = crate::parse::hex_u32(s)?;
+        Time::from_consensus(time)
+    }
+}
+
+/// Returns true if `n` is a block height i.e., less than 500,000,000.
+fn is_block_height(n: u32) -> bool { n < LOCK_TIME_THRESHOLD }
+
+/// Returns true if `n` is a UNIX timestamp i.e., greater than or equal to 500,000,000.
+fn is_block_time(n: u32) -> bool { n >= LOCK_TIME_THRESHOLD }
+
+/// Catchall type for errors that relate to time locks.
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[non_exhaustive]
+pub enum Error {
+    /// An error occurred while converting a `u32` to a lock time variant.
+    Conversion(ConversionError),
+    /// An error occurred while operating on lock times.
+    Operation(OperationError),
+    /// An error occurred while parsing a string into an `u32`.
+    Parse(ParseIntError),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use self::Error::*;
+
+        match *self {
+            Conversion(ref e) => write_err!(f, "error converting lock time value"; e),
+            Operation(ref e) => write_err!(f, "error during lock time operation"; e),
+            Parse(ref e) => write_err!(f, "failed to parse lock time from string"; e),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match *self {
+            Conversion(ref e) => Some(e),
+            Operation(ref e) => Some(e),
+            Parse(ref e) => Some(e),
+        }
+    }
+}
+
+impl From<ConversionError> for Error {
+    #[inline]
+    fn from(e: ConversionError) -> Self { Error::Conversion(e) }
+}
+
+impl From<OperationError> for Error {
+    #[inline]
+    fn from(e: OperationError) -> Self { Error::Operation(e) }
+}
+
+impl From<ParseIntError> for Error {
+    #[inline]
+    fn from(e: ParseIntError) -> Self { Error::Parse(e) }
+}
+
+/// An error that occurs when converting a `u32` to a lock time variant.
+#[derive(Debug, Clone, Eq, PartialEq, Hash)]
+pub struct ConversionError {
+    /// The expected timelock unit, height (blocks) or time (seconds).
+    unit: LockTimeUnit,
+    /// The invalid input value.
+    input: u32,
+}
+
+impl ConversionError {
+    /// Constructs a `ConversionError` from an invalid `n` when expecting a height value.
+    fn invalid_height(n: u32) -> Self { Self { unit: LockTimeUnit::Blocks, input: n } }
+
+    /// Constructs a `ConversionError` from an invalid `n` when expecting a time value.
+    fn invalid_time(n: u32) -> Self { Self { unit: LockTimeUnit::Seconds, input: n } }
+}
+
+impl fmt::Display for ConversionError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "invalid lock time value {}, {}", self.input, self.unit)
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for ConversionError {}
+
+/// Describes the two types of locking, lock-by-blockheight and lock-by-blocktime.
+#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
+enum LockTimeUnit {
+    /// Lock by blockheight.
+    Blocks,
+    /// Lock by blocktime.
+    Seconds,
+}
+
+impl fmt::Display for LockTimeUnit {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use LockTimeUnit::*;
+
+        match *self {
+            Blocks => write!(f, "expected lock-by-blockheight (must be < {})", LOCK_TIME_THRESHOLD),
+            Seconds => write!(f, "expected lock-by-blocktime (must be >= {})", LOCK_TIME_THRESHOLD),
+        }
+    }
+}
+
+/// Errors than occur when operating on lock times.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[non_exhaustive]
+pub enum OperationError {
+    /// Cannot compare different lock time units (height vs time).
+    InvalidComparison,
+}
+
+impl fmt::Display for OperationError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use self::OperationError::*;
+
+        match *self {
+            InvalidComparison =>
+                f.write_str("cannot compare different lock units (height vs time)"),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for OperationError {}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn display_and_alternate() {
+        let n = LockTime::from_consensus(741521);
+        let s = format!("{}", n);
+        assert_eq!(&s, "741521");
+
+        let got = format!("{:#}", n);
+        assert_eq!(got, "block-height 741521");
+    }
+
+    #[test]
+    fn time_from_str_hex_happy_path() {
+        let actual = Time::from_hex_str("0x6289C350").unwrap();
+        let expected = Time::from_consensus(0x6289C350).unwrap();
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn time_from_str_hex_no_prefix_happy_path() {
+        let time = Time::from_hex_str_no_prefix("6289C350").unwrap();
+        assert_eq!(time, Time(0x6289C350));
+    }
+
+    #[test]
+    fn time_from_str_hex_invalid_hex_should_err() {
+        let hex = "0xzb93";
+        let result = Time::from_hex_str(hex);
+        assert!(result.is_err());
+    }
+
+    #[test]
+    fn packed_lock_time_from_str_hex_happy_path() {
+        let actual = LockTime::from_hex_str("0xBA70D").unwrap();
+        let expected = LockTime::from_consensus(0xBA70D);
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn packed_lock_time_from_str_hex_no_prefix_happy_path() {
+        let lock_time = LockTime::from_hex_str_no_prefix("BA70D").unwrap();
+        assert_eq!(lock_time, LockTime::from_consensus(0xBA70D));
+    }
+
+    #[test]
+    fn packed_lock_time_from_str_hex_invalid_hex_should_ergr() {
+        let hex = "0xzb93";
+        let result = LockTime::from_hex_str(hex);
+        assert!(result.is_err());
+    }
+
+    #[test]
+    fn height_from_str_hex_happy_path() {
+        let actual = Height::from_hex_str("0xBA70D").unwrap();
+        let expected = Height(0xBA70D);
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn height_from_str_hex_no_prefix_happy_path() {
+        let height = Height::from_hex_str_no_prefix("BA70D").unwrap();
+        assert_eq!(height, Height(0xBA70D));
+    }
+
+    #[test]
+    fn height_from_str_hex_invalid_hex_should_err() {
+        let hex = "0xzb93";
+        let result = Height::from_hex_str(hex);
+        assert!(result.is_err());
+    }
+
+    #[test]
+    fn parses_correctly_to_height_or_time() {
+        let lock = LockTime::from_consensus(750_000);
+
+        assert!(lock.is_block_height());
+        assert!(!lock.is_block_time());
+
+        let t: u32 = 1653195600; // May 22nd, 5am UTC.
+        let lock = LockTime::from_consensus(t);
+
+        assert!(!lock.is_block_height());
+        assert!(lock.is_block_time());
+    }
+
+    #[test]
+    fn satisfied_by_height() {
+        let lock = LockTime::from_consensus(750_000);
+
+        let height = Height::from_consensus(800_000).expect("failed to parse height");
+
+        let t: u32 = 1653195600; // May 22nd, 5am UTC.
+        let time = Time::from_consensus(t).expect("invalid time value");
+
+        assert!(lock.is_satisfied_by(height, time))
+    }
+
+    #[test]
+    fn satisfied_by_time() {
+        let lock = LockTime::from_consensus(1053195600);
+
+        let t: u32 = 1653195600; // May 22nd, 5am UTC.
+        let time = Time::from_consensus(t).expect("invalid time value");
+
+        let height = Height::from_consensus(800_000).expect("failed to parse height");
+
+        assert!(lock.is_satisfied_by(height, time))
+    }
+
+    #[test]
+    fn satisfied_by_same_height() {
+        let h = 750_000;
+        let lock = LockTime::from_consensus(h);
+        let height = Height::from_consensus(h).expect("failed to parse height");
+
+        let t: u32 = 1653195600; // May 22nd, 5am UTC.
+        let time = Time::from_consensus(t).expect("invalid time value");
+
+        assert!(lock.is_satisfied_by(height, time))
+    }
+
+    #[test]
+    fn satisfied_by_same_time() {
+        let t: u32 = 1653195600; // May 22nd, 5am UTC.
+        let lock = LockTime::from_consensus(t);
+        let time = Time::from_consensus(t).expect("invalid time value");
+
+        let height = Height::from_consensus(800_000).expect("failed to parse height");
+
+        assert!(lock.is_satisfied_by(height, time))
+    }
+
+    #[test]
+    fn height_correctly_implies() {
+        let lock = LockTime::from_consensus(750_005);
+
+        assert!(!lock.is_implied_by(LockTime::from_consensus(750_004)));
+        assert!(lock.is_implied_by(LockTime::from_consensus(750_005)));
+        assert!(lock.is_implied_by(LockTime::from_consensus(750_006)));
+    }
+
+    #[test]
+    fn time_correctly_implies() {
+        let t: u32 = 1700000005;
+        let lock = LockTime::from_consensus(t);
+
+        assert!(!lock.is_implied_by(LockTime::from_consensus(1700000004)));
+        assert!(lock.is_implied_by(LockTime::from_consensus(1700000005)));
+        assert!(lock.is_implied_by(LockTime::from_consensus(1700000006)));
+    }
+
+    #[test]
+    fn incorrect_units_do_not_imply() {
+        let lock = LockTime::from_consensus(750_005);
+        assert!(!lock.is_implied_by(LockTime::from_consensus(1700000004)));
+    }
+}
diff --git a/dash/src/blockdata/locktime/mod.rs b/dash/src/blockdata/locktime/mod.rs
new file mode 100644
index 000000000..74927f04e
--- /dev/null
+++ b/dash/src/blockdata/locktime/mod.rs
@@ -0,0 +1,8 @@
+// Rust Bitcoin Library - Written by the rust-dash developers.
+// SPDX-License-Identifier: CC0-1.0
+
+//! Provides absolute and relative locktimes.
+//!
+
+pub mod absolute;
+pub mod relative;
diff --git a/dash/src/blockdata/locktime/relative.rs b/dash/src/blockdata/locktime/relative.rs
new file mode 100644
index 000000000..afe26d236
--- /dev/null
+++ b/dash/src/blockdata/locktime/relative.rs
@@ -0,0 +1,385 @@
+// Rust Bitcoin Library - Written by the rust-dash developers.
+// SPDX-License-Identifier: CC0-1.0
+
+//! Provides type [`LockTime`] that implements the logic around nSequence/OP_CHECKSEQUENCEVERIFY.
+//!
+//! There are two types of lock time: lock-by-blockheight and lock-by-blocktime, distinguished by
+//! whether bit 22 of the `u32` consensus value is set.
+//!
+
+use core::convert::TryFrom;
+use core::fmt;
+
+#[cfg(all(test, mutate))]
+use mutagen::mutate;
+
+use crate::parse::impl_parse_str_from_int_infallible;
+use crate::prelude::*;
+#[cfg(doc)]
+use crate::relative;
+
+/// A relative lock time value, representing either a block height or time (512 second intervals).
+///
+/// The `relative::LockTime` type does not have any constructors, this is by design, please use
+/// `Sequence::to_relative_lock_time` to create a relative lock time.
+///
+/// ### Relevant BIPs
+///
+/// * [BIP 68 Relative lock-time using consensus-enforced sequence numbers](https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki)
+/// * [BIP 112 CHECKSEQUENCEVERIFY](https://github.com/bitcoin/bips/blob/master/bip-0112.mediawiki)
+#[allow(clippy::derive_ord_xor_partial_ord)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub enum LockTime {
+    /// A block height lock time value.
+    Blocks(Height),
+    /// A 512 second time interval value.
+    Time(Time),
+}
+
+impl LockTime {
+    /// Returns true if this [`relative::LockTime`] is satisfied by either height or time.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// # use dashcore::locktime::relative::{LockTime, Height, Time};
+    ///
+    /// # let height = 100;       // 100 blocks.
+    /// # let intervals = 70;     // Approx 10 hours.
+    /// # let current_height = || Height::from(height + 10);
+    /// # let current_time = || Time::from_512_second_intervals(intervals + 10);
+    /// # let lock = LockTime::from(Height::from(height));
+    /// # let test_lock = LockTime::from(Height::from(height+10));
+    ///
+    /// // Users that have chain data can get the current height and time to check against a lock.
+    /// let height_and_time = (current_time(), current_height());  // tuple order does not matter.
+    /// assert!(lock.is_satisfied_by(current_height(), current_time()));
+    /// ```
+    #[inline]
+    #[cfg_attr(all(test, mutate), mutate)]
+    pub fn is_satisfied_by(&self, h: Height, t: Time) -> bool {
+        if let Ok(true) = self.is_satisfied_by_height(h) {
+            true
+        } else {
+            matches!(self.is_satisfied_by_time(t), Ok(true))
+        }
+    }
+
+    /// Returns true if satisfaction of `other` lock time implies satisfaction of this
+    /// [`relative::LockTime`].
+    ///
+    /// A lock time can only be satisfied by n blocks being mined or n seconds passing. If you have
+    /// two lock times (same unit) then the larger lock time being satisfied implies (in a
+    /// mathematical sense) the smaller one being satisfied.
+    ///
+    /// This function is useful when checking sequence values against a lock, first one checks the
+    /// sequence represents a relative lock time by converting to `LockTime` then use this function
+    /// to see if satisfaction of the newly created lock time would imply satisfaction of `self`.
+    ///
+    /// Can also be used to remove the smaller value of two `OP_CHECKSEQUENCEVERIFY` operations
+    /// within one branch of the script.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// # use dashcore::locktime::relative::{LockTime, Height, Time};
+    ///
+    /// # let height = 100;       // 100 blocks.
+    /// # let lock = LockTime::from(Height::from(height));
+    /// # let test_lock = LockTime::from(Height::from(height+10));
+    ///
+    /// assert!(lock.is_implied_by(test_lock));
+    /// ```
+    #[inline]
+    #[cfg_attr(all(test, mutate), mutate)]
+    pub fn is_implied_by(&self, other: LockTime) -> bool {
+        use LockTime::*;
+
+        match (*self, other) {
+            (Blocks(this), Blocks(other)) => this.value() <= other.value(),
+            (Time(this), Time(other)) => this.value() <= other.value(),
+            _ => false, // Not the same units.
+        }
+    }
+
+    /// Returns true if this [`relative::LockTime`] is satisfied by [`Height`].
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if this lock is not lock-by-height.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// # use dashcore::locktime::relative::{LockTime, Height, Time};
+    ///
+    /// let height: u16 = 100;
+    /// let lock = LockTime::from(Height::from(height));
+    /// assert!(lock.is_satisfied_by_height(Height::from(height+1)).expect("a height"));
+    /// ```
+    #[inline]
+    #[cfg_attr(all(test, mutate), mutate)]
+    pub fn is_satisfied_by_height(&self, h: Height) -> Result<bool, Error> {
+        use LockTime::*;
+
+        match *self {
+            Blocks(ref height) => Ok(height.value() <= h.value()),
+            Time(ref time) => Err(Error::IncompatibleTime(*self, *time)),
+        }
+    }
+
+    /// Returns true if this [`relative::LockTime`] is satisfied by [`Time`].
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if this lock is not lock-by-time.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// use dashcore::locktime::relative::{LockTime, Height, Time};
+    ///
+    /// let intervals: u16 = 70; // approx 10 hours;
+    /// let lock = LockTime::from(Time::from_512_second_intervals(intervals));
+    /// assert!(lock.is_satisfied_by_time(Time::from_512_second_intervals(intervals + 10)).expect("a time"));
+    /// ```
+    #[inline]
+    #[cfg_attr(all(test, mutate), mutate)]
+    pub fn is_satisfied_by_time(&self, t: Time) -> Result<bool, Error> {
+        use LockTime::*;
+
+        match *self {
+            Time(ref time) => Ok(time.value() <= t.value()),
+            Blocks(ref height) => Err(Error::IncompatibleHeight(*self, *height)),
+        }
+    }
+}
+
+impl From<Height> for LockTime {
+    #[inline]
+    fn from(h: Height) -> Self { LockTime::Blocks(h) }
+}
+
+impl From<Time> for LockTime {
+    #[inline]
+    fn from(t: Time) -> Self { LockTime::Time(t) }
+}
+
+impl fmt::Display for LockTime {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use LockTime::*;
+
+        if f.alternate() {
+            match *self {
+                Blocks(ref h) => write!(f, "block-height {}", h),
+                Time(ref t) => write!(f, "block-time {} (512 second intervals)", t),
+            }
+        } else {
+            match *self {
+                Blocks(ref h) => fmt::Display::fmt(h, f),
+                Time(ref t) => fmt::Display::fmt(t, f),
+            }
+        }
+    }
+}
+
+/// A relative lock time lock-by-blockheight value.
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Height(u16);
+
+impl Height {
+    /// Relative block height 0, can be included in any block.
+    pub const ZERO: Self = Height(0);
+
+    /// The minimum relative block height (0), can be included in any block.
+    pub const MIN: Self = Self::ZERO;
+
+    /// The maximum relative block height.
+    pub const MAX: Self = Height(u16::max_value());
+
+    /// The minimum relative block height (0), can be included in any block.
+    ///
+    /// This is provided for consistency with Rust 1.41.1, newer code should use [`Height::MIN`].
+    pub const fn min_value() -> Self { Self::MIN }
+
+    /// The maximum relative block height.
+    ///
+    /// This is provided for consistency with Rust 1.41.1, newer code should use [`Height::MAX`].
+    pub const fn max_value() -> Self { Self::MAX }
+
+    /// Returns the inner `u16` value.
+    #[inline]
+    pub fn value(self) -> u16 { self.0 }
+}
+
+impl From<u16> for Height {
+    #[inline]
+    fn from(value: u16) -> Self { Height(value) }
+}
+
+impl_parse_str_from_int_infallible!(Height, u16, from);
+
+impl fmt::Display for Height {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(&self.0, f) }
+}
+
+/// A relative lock time lock-by-blocktime value.
+///
+/// For BIP 68 relative lock-by-blocktime locks, time is measure in 512 second intervals.
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Time(u16);
+
+impl Time {
+    /// Relative block time 0, can be included in any block.
+    pub const ZERO: Self = Time(0);
+
+    /// The minimum relative block time (0), can be included in any block.
+    pub const MIN: Self = Time::ZERO;
+
+    /// The maximum relative block time (33,554,432 seconds or approx 388 days).
+    pub const MAX: Self = Time(u16::max_value());
+
+    /// The minimum relative block time.
+    ///
+    /// This is provided for consistency with Rust 1.41.1, newer code should use [`Time::MIN`].
+    pub const fn min_value() -> Self { Self::MIN }
+
+    /// The maximum relative block time.
+    ///
+    /// This is provided for consistency with Rust 1.41.1, newer code should use [`Time::MAX`].
+    pub const fn max_value() -> Self { Self::MAX }
+
+    /// Create a [`Time`] using time intervals where each interval is equivalent to 512 seconds.
+    ///
+    /// Encoding finer granularity of time for relative lock-times is not supported in Bitcoin.
+    #[inline]
+    pub fn from_512_second_intervals(intervals: u16) -> Self { Time(intervals) }
+
+    /// Create a [`Time`] from seconds, converting the seconds into 512 second interval with ceiling
+    /// division.
+    ///
+    /// # Errors
+    ///
+    /// Will return an error if the input cannot be encoded in 16 bits.
+    #[inline]
+    pub fn from_seconds_ceil(seconds: u32) -> Result<Self, Error> {
+        if let Ok(interval) = u16::try_from((seconds + 511) / 512) {
+            Ok(Time::from_512_second_intervals(interval))
+        } else {
+            Err(Error::IntegerOverflow(seconds))
+        }
+    }
+
+    /// Returns the inner `u16` value.
+    #[inline]
+    pub fn value(self) -> u16 { self.0 }
+}
+
+impl_parse_str_from_int_infallible!(Time, u16, from_512_second_intervals);
+
+impl fmt::Display for Time {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(&self.0, f) }
+}
+
+/// Errors related to relative lock times.
+#[derive(Clone, PartialEq, Eq, Debug)]
+#[non_exhaustive]
+pub enum Error {
+    /// Input time in seconds was too large to be encoded to a 16 bit 512 second interval.
+    IntegerOverflow(u32),
+    /// Tried to satisfy a lock-by-blocktime lock using a height value.
+    IncompatibleHeight(LockTime, Height),
+    /// Tried to satisfy a lock-by-blockheight lock using a time value.
+    IncompatibleTime(LockTime, Time),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Self::IntegerOverflow(val) => write!(
+                f,
+                "{} seconds is too large to be encoded to a 16 bit 512 second interval",
+                val
+            ),
+            Self::IncompatibleHeight(lock, height) =>
+                write!(f, "tried to satisfy lock {} with height: {}", lock, height),
+            Self::IncompatibleTime(lock, time) =>
+                write!(f, "tried to satisfy lock {} with time: {}", lock, time),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match *self {
+            IntegerOverflow(_) | IncompatibleHeight(_, _) | IncompatibleTime(_, _) => None,
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn satisfied_by_height() {
+        let height = Height::from(10);
+        let time = Time::from_512_second_intervals(70);
+
+        let lock = LockTime::from(height);
+
+        assert!(!lock.is_satisfied_by(Height::from(9), time));
+        assert!(lock.is_satisfied_by(Height::from(10), time));
+        assert!(lock.is_satisfied_by(Height::from(11), time));
+    }
+
+    #[test]
+    fn satisfied_by_time() {
+        let height = Height::from(10);
+        let time = Time::from_512_second_intervals(70);
+
+        let lock = LockTime::from(time);
+
+        assert!(!lock.is_satisfied_by(height, Time::from_512_second_intervals(69)));
+        assert!(lock.is_satisfied_by(height, Time::from_512_second_intervals(70)));
+        assert!(lock.is_satisfied_by(height, Time::from_512_second_intervals(71)));
+    }
+
+    #[test]
+    fn height_correctly_implies() {
+        let height = Height::from(10);
+        let lock = LockTime::from(height);
+
+        assert!(!lock.is_implied_by(LockTime::from(Height::from(9))));
+        assert!(lock.is_implied_by(LockTime::from(Height::from(10))));
+        assert!(lock.is_implied_by(LockTime::from(Height::from(11))));
+    }
+
+    #[test]
+    fn time_correctly_implies() {
+        let time = Time::from_512_second_intervals(70);
+        let lock = LockTime::from(time);
+
+        assert!(!lock.is_implied_by(LockTime::from(Time::from_512_second_intervals(69))));
+        assert!(lock.is_implied_by(LockTime::from(Time::from_512_second_intervals(70))));
+        assert!(lock.is_implied_by(LockTime::from(Time::from_512_second_intervals(71))));
+    }
+
+    #[test]
+    fn incorrect_units_do_not_imply() {
+        let time = Time::from_512_second_intervals(70);
+        let height = Height::from(10);
+
+        let lock = LockTime::from(time);
+        assert!(!lock.is_implied_by(LockTime::from(height)));
+    }
+}
diff --git a/dash/src/blockdata/mod.rs b/dash/src/blockdata/mod.rs
new file mode 100644
index 000000000..09cee2cba
--- /dev/null
+++ b/dash/src/blockdata/mod.rs
@@ -0,0 +1,21 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+//! Bitcoin block data.
+//!
+//! This module defines structures and functions for storing the blocks and
+//! transactions which make up the Bitcoin system.
+//!
+
+pub mod block;
+pub mod constants;
+pub mod fee_rate;
+pub mod opcodes;
+pub mod transaction;
+pub mod weight;
+pub mod witness;
+pub mod script;
+pub mod locktime;
+
+pub use fee_rate::FeeRate;
+pub use weight::Weight;
diff --git a/dash/src/blockdata/opcodes.rs b/dash/src/blockdata/opcodes.rs
new file mode 100644
index 000000000..fc711f98d
--- /dev/null
+++ b/dash/src/blockdata/opcodes.rs
@@ -0,0 +1,846 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+//! Bitcoin script opcodes.
+//!
+//! Bitcoin's script uses a stack-based assembly language. This module defines
+//! all of the opcodes for that language.
+//!
+
+#![allow(non_camel_case_types)]
+
+use core::convert::From;
+use core::fmt;
+
+use internals::debug_from_display;
+#[cfg(feature = "serde")]
+use serde;
+
+#[cfg(feature = "serde")]
+use crate::prelude::*;
+
+/// A script Opcode.
+///
+/// We do not implement Ord on this type because there is no natural ordering on opcodes, but there
+/// may appear to be one (e.g. because all the push opcodes appear in a consecutive block) and we
+/// don't want to encourage subtly buggy code. Please use [`All::classify`] to distinguish different
+/// types of opcodes.
+///
+/// <details>
+///   <summary>Example of Core bug caused by assuming ordering</summary>
+///
+///   Bitcoin Core's `IsPushOnly` considers `OP_RESERVED` to be a "push code", allowing this opcode
+///   in contexts where only pushes are supposed to be allowed.
+/// </details>
+#[derive(Copy, Clone, PartialEq, Eq)]
+pub struct All {
+    code: u8,
+}
+
+use self::all::*;
+
+macro_rules! all_opcodes {
+    ($($op:ident => $val:expr, $doc:expr);*) => {
+        // private import so we don't have to use `all::OP_FOO` in this file.
+
+        /// Enables wildcard imports to bring into scope all opcodes and nothing else.
+        ///
+        /// The `all` module is provided so one can use a wildcard import `use dash::opcodes::all::*` to
+        /// get all the `OP_FOO` opcodes without getting other types defined in `opcodes` (e.g. `All`, `Class`).
+        ///
+        /// This module is guaranteed to never contain anything except opcode constants and all opcode
+        /// constants are guaranteed to begin with OP_.
+        pub mod all {
+            use super::All;
+                $(
+                    #[doc = $doc]
+                    pub const $op: All = All { code: $val};
+                )*
+        }
+
+        impl fmt::Display for All {
+            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+                 match *self {
+                   $(
+                        $op => fmt::Display::fmt(stringify!($op), f),
+                    )+
+                }
+            }
+        }
+
+    }
+}
+
+all_opcodes! {
+    OP_PUSHBYTES_0 => 0x00, "Push an empty array onto the stack.";
+    OP_PUSHBYTES_1 => 0x01, "Push the next byte as an array onto the stack.";
+    OP_PUSHBYTES_2 => 0x02, "Push the next 2 bytes as an array onto the stack.";
+    OP_PUSHBYTES_3 => 0x03, "Push the next 3 bytes as an array onto the stack.";
+    OP_PUSHBYTES_4 => 0x04, "Push the next 4 bytes as an array onto the stack.";
+    OP_PUSHBYTES_5 => 0x05, "Push the next 5 bytes as an array onto the stack.";
+    OP_PUSHBYTES_6 => 0x06, "Push the next 6 bytes as an array onto the stack.";
+    OP_PUSHBYTES_7 => 0x07, "Push the next 7 bytes as an array onto the stack.";
+    OP_PUSHBYTES_8 => 0x08, "Push the next 8 bytes as an array onto the stack.";
+    OP_PUSHBYTES_9 => 0x09, "Push the next 9 bytes as an array onto the stack.";
+    OP_PUSHBYTES_10 => 0x0a, "Push the next 10 bytes as an array onto the stack.";
+    OP_PUSHBYTES_11 => 0x0b, "Push the next 11 bytes as an array onto the stack.";
+    OP_PUSHBYTES_12 => 0x0c, "Push the next 12 bytes as an array onto the stack.";
+    OP_PUSHBYTES_13 => 0x0d, "Push the next 13 bytes as an array onto the stack.";
+    OP_PUSHBYTES_14 => 0x0e, "Push the next 14 bytes as an array onto the stack.";
+    OP_PUSHBYTES_15 => 0x0f, "Push the next 15 bytes as an array onto the stack.";
+    OP_PUSHBYTES_16 => 0x10, "Push the next 16 bytes as an array onto the stack.";
+    OP_PUSHBYTES_17 => 0x11, "Push the next 17 bytes as an array onto the stack.";
+    OP_PUSHBYTES_18 => 0x12, "Push the next 18 bytes as an array onto the stack.";
+    OP_PUSHBYTES_19 => 0x13, "Push the next 19 bytes as an array onto the stack.";
+    OP_PUSHBYTES_20 => 0x14, "Push the next 20 bytes as an array onto the stack.";
+    OP_PUSHBYTES_21 => 0x15, "Push the next 21 bytes as an array onto the stack.";
+    OP_PUSHBYTES_22 => 0x16, "Push the next 22 bytes as an array onto the stack.";
+    OP_PUSHBYTES_23 => 0x17, "Push the next 23 bytes as an array onto the stack.";
+    OP_PUSHBYTES_24 => 0x18, "Push the next 24 bytes as an array onto the stack.";
+    OP_PUSHBYTES_25 => 0x19, "Push the next 25 bytes as an array onto the stack.";
+    OP_PUSHBYTES_26 => 0x1a, "Push the next 26 bytes as an array onto the stack.";
+    OP_PUSHBYTES_27 => 0x1b, "Push the next 27 bytes as an array onto the stack.";
+    OP_PUSHBYTES_28 => 0x1c, "Push the next 28 bytes as an array onto the stack.";
+    OP_PUSHBYTES_29 => 0x1d, "Push the next 29 bytes as an array onto the stack.";
+    OP_PUSHBYTES_30 => 0x1e, "Push the next 30 bytes as an array onto the stack.";
+    OP_PUSHBYTES_31 => 0x1f, "Push the next 31 bytes as an array onto the stack.";
+    OP_PUSHBYTES_32 => 0x20, "Push the next 32 bytes as an array onto the stack.";
+    OP_PUSHBYTES_33 => 0x21, "Push the next 33 bytes as an array onto the stack.";
+    OP_PUSHBYTES_34 => 0x22, "Push the next 34 bytes as an array onto the stack.";
+    OP_PUSHBYTES_35 => 0x23, "Push the next 35 bytes as an array onto the stack.";
+    OP_PUSHBYTES_36 => 0x24, "Push the next 36 bytes as an array onto the stack.";
+    OP_PUSHBYTES_37 => 0x25, "Push the next 37 bytes as an array onto the stack.";
+    OP_PUSHBYTES_38 => 0x26, "Push the next 38 bytes as an array onto the stack.";
+    OP_PUSHBYTES_39 => 0x27, "Push the next 39 bytes as an array onto the stack.";
+    OP_PUSHBYTES_40 => 0x28, "Push the next 40 bytes as an array onto the stack.";
+    OP_PUSHBYTES_41 => 0x29, "Push the next 41 bytes as an array onto the stack.";
+    OP_PUSHBYTES_42 => 0x2a, "Push the next 42 bytes as an array onto the stack.";
+    OP_PUSHBYTES_43 => 0x2b, "Push the next 43 bytes as an array onto the stack.";
+    OP_PUSHBYTES_44 => 0x2c, "Push the next 44 bytes as an array onto the stack.";
+    OP_PUSHBYTES_45 => 0x2d, "Push the next 45 bytes as an array onto the stack.";
+    OP_PUSHBYTES_46 => 0x2e, "Push the next 46 bytes as an array onto the stack.";
+    OP_PUSHBYTES_47 => 0x2f, "Push the next 47 bytes as an array onto the stack.";
+    OP_PUSHBYTES_48 => 0x30, "Push the next 48 bytes as an array onto the stack.";
+    OP_PUSHBYTES_49 => 0x31, "Push the next 49 bytes as an array onto the stack.";
+    OP_PUSHBYTES_50 => 0x32, "Push the next 50 bytes as an array onto the stack.";
+    OP_PUSHBYTES_51 => 0x33, "Push the next 51 bytes as an array onto the stack.";
+    OP_PUSHBYTES_52 => 0x34, "Push the next 52 bytes as an array onto the stack.";
+    OP_PUSHBYTES_53 => 0x35, "Push the next 53 bytes as an array onto the stack.";
+    OP_PUSHBYTES_54 => 0x36, "Push the next 54 bytes as an array onto the stack.";
+    OP_PUSHBYTES_55 => 0x37, "Push the next 55 bytes as an array onto the stack.";
+    OP_PUSHBYTES_56 => 0x38, "Push the next 56 bytes as an array onto the stack.";
+    OP_PUSHBYTES_57 => 0x39, "Push the next 57 bytes as an array onto the stack.";
+    OP_PUSHBYTES_58 => 0x3a, "Push the next 58 bytes as an array onto the stack.";
+    OP_PUSHBYTES_59 => 0x3b, "Push the next 59 bytes as an array onto the stack.";
+    OP_PUSHBYTES_60 => 0x3c, "Push the next 60 bytes as an array onto the stack.";
+    OP_PUSHBYTES_61 => 0x3d, "Push the next 61 bytes as an array onto the stack.";
+    OP_PUSHBYTES_62 => 0x3e, "Push the next 62 bytes as an array onto the stack.";
+    OP_PUSHBYTES_63 => 0x3f, "Push the next 63 bytes as an array onto the stack.";
+    OP_PUSHBYTES_64 => 0x40, "Push the next 64 bytes as an array onto the stack.";
+    OP_PUSHBYTES_65 => 0x41, "Push the next 65 bytes as an array onto the stack.";
+    OP_PUSHBYTES_66 => 0x42, "Push the next 66 bytes as an array onto the stack.";
+    OP_PUSHBYTES_67 => 0x43, "Push the next 67 bytes as an array onto the stack.";
+    OP_PUSHBYTES_68 => 0x44, "Push the next 68 bytes as an array onto the stack.";
+    OP_PUSHBYTES_69 => 0x45, "Push the next 69 bytes as an array onto the stack.";
+    OP_PUSHBYTES_70 => 0x46, "Push the next 70 bytes as an array onto the stack.";
+    OP_PUSHBYTES_71 => 0x47, "Push the next 71 bytes as an array onto the stack.";
+    OP_PUSHBYTES_72 => 0x48, "Push the next 72 bytes as an array onto the stack.";
+    OP_PUSHBYTES_73 => 0x49, "Push the next 73 bytes as an array onto the stack.";
+    OP_PUSHBYTES_74 => 0x4a, "Push the next 74 bytes as an array onto the stack.";
+    OP_PUSHBYTES_75 => 0x4b, "Push the next 75 bytes as an array onto the stack.";
+    OP_PUSHDATA1 => 0x4c, "Read the next byte as N; push the next N bytes as an array onto the stack.";
+    OP_PUSHDATA2 => 0x4d, "Read the next 2 bytes as N; push the next N bytes as an array onto the stack.";
+    OP_PUSHDATA4 => 0x4e, "Read the next 4 bytes as N; push the next N bytes as an array onto the stack.";
+    OP_PUSHNUM_NEG1 => 0x4f, "Push the array `0x81` onto the stack.";
+    OP_RESERVED => 0x50, "Synonym for OP_RETURN.";
+    OP_PUSHNUM_1 => 0x51, "Push the array `0x01` onto the stack.";
+    OP_PUSHNUM_2 => 0x52, "the array `0x02` onto the stack.";
+    OP_PUSHNUM_3 => 0x53, "Push the array `0x03` onto the stack.";
+    OP_PUSHNUM_4 => 0x54, "Push the array `0x04` onto the stack.";
+    OP_PUSHNUM_5 => 0x55, "Push the array `0x05` onto the stack.";
+    OP_PUSHNUM_6 => 0x56, "Push the array `0x06` onto the stack.";
+    OP_PUSHNUM_7 => 0x57, "Push the array `0x07` onto the stack.";
+    OP_PUSHNUM_8 => 0x58, "Push the array `0x08` onto the stack.";
+    OP_PUSHNUM_9 => 0x59, "Push the array `0x09` onto the stack.";
+    OP_PUSHNUM_10 => 0x5a, "Push the array `0x0a` onto the stack.";
+    OP_PUSHNUM_11 => 0x5b, "Push the array `0x0b` onto the stack.";
+    OP_PUSHNUM_12 => 0x5c, "Push the array `0x0c` onto the stack.";
+    OP_PUSHNUM_13 => 0x5d, "Push the array `0x0d` onto the stack.";
+    OP_PUSHNUM_14 => 0x5e, "Push the array `0x0e` onto the stack.";
+    OP_PUSHNUM_15 => 0x5f, "Push the array `0x0f` onto the stack.";
+    OP_PUSHNUM_16 => 0x60, "Push the array `0x10` onto the stack.";
+    OP_NOP => 0x61, "Does nothing.";
+    OP_VER => 0x62, "Synonym for OP_RETURN.";
+    OP_IF => 0x63, "Pop and execute the next statements if a nonzero element was popped.";
+    OP_NOTIF => 0x64, "Pop and execute the next statements if a zero element was popped.";
+    OP_VERIF => 0x65, "Fail the script unconditionally, does not even need to be executed.";
+    OP_VERNOTIF => 0x66, "Fail the script unconditionally, does not even need to be executed.";
+    OP_ELSE => 0x67, "Execute statements if those after the previous OP_IF were not, and vice-versa. \
+             If there is no previous OP_IF, this acts as a RETURN.";
+    OP_ENDIF => 0x68, "Pop and execute the next statements if a zero element was popped.";
+    OP_VERIFY => 0x69, "If the top value is zero or the stack is empty, fail; otherwise, pop the stack.";
+    OP_RETURN => 0x6a, "Fail the script immediately. (Must be executed.).";
+    OP_TOALTSTACK => 0x6b, "Pop one element from the main stack onto the alt stack.";
+    OP_FROMALTSTACK => 0x6c, "Pop one element from the alt stack onto the main stack.";
+    OP_2DROP => 0x6d, "Drops the top two stack items.";
+    OP_2DUP => 0x6e, "Duplicates the top two stack items as AB -> ABAB.";
+    OP_3DUP => 0x6f, "Duplicates the two three stack items as ABC -> ABCABC.";
+    OP_2OVER => 0x70, "Copies the two stack items of items two spaces back to the front, as xxAB -> ABxxAB.";
+    OP_2ROT => 0x71, "Moves the two stack items four spaces back to the front, as xxxxAB -> ABxxxx.";
+    OP_2SWAP => 0x72, "Swaps the top two pairs, as ABCD -> CDAB.";
+    OP_IFDUP => 0x73, "Duplicate the top stack element unless it is zero.";
+    OP_DEPTH => 0x74, "Push the current number of stack items onto the stack.";
+    OP_DROP => 0x75, "Drops the top stack item.";
+    OP_DUP => 0x76, "Duplicates the top stack item.";
+    OP_NIP => 0x77, "Drops the second-to-top stack item.";
+    OP_OVER => 0x78, "Copies the second-to-top stack item, as xA -> AxA.";
+    OP_PICK => 0x79, "Pop the top stack element as N. Copy the Nth stack element to the top.";
+    OP_ROLL => 0x7a, "Pop the top stack element as N. Move the Nth stack element to the top.";
+    OP_ROT => 0x7b, "Rotate the top three stack items, as [top next1 next2] -> [next2 top next1].";
+    OP_SWAP => 0x7c, "Swap the top two stack items.";
+    OP_TUCK => 0x7d, "Copy the top stack item to before the second item, as [top next] -> [top next top].";
+    OP_CAT => 0x7e, "Fail the script unconditionally, does not even need to be executed.";
+    OP_SUBSTR => 0x7f, "Fail the script unconditionally, does not even need to be executed.";
+    OP_LEFT => 0x80, "Fail the script unconditionally, does not even need to be executed.";
+    OP_RIGHT => 0x81, "Fail the script unconditionally, does not even need to be executed.";
+    OP_SIZE => 0x82, "Pushes the length of the top stack item onto the stack.";
+    OP_INVERT => 0x83, "Fail the script unconditionally, does not even need to be executed.";
+    OP_AND => 0x84, "Fail the script unconditionally, does not even need to be executed.";
+    OP_OR => 0x85, "Fail the script unconditionally, does not even need to be executed.";
+    OP_XOR => 0x86, "Fail the script unconditionally, does not even need to be executed.";
+    OP_EQUAL => 0x87, "Pushes 1 if the inputs are exactly equal, 0 otherwise.";
+    OP_EQUALVERIFY => 0x88, "Returns success if the inputs are exactly equal, failure otherwise.";
+    OP_RESERVED1 => 0x89, "Synonym for OP_RETURN.";
+    OP_RESERVED2 => 0x8a, "Synonym for OP_RETURN.";
+    OP_1ADD => 0x8b, "Increment the top stack element in place.";
+    OP_1SUB => 0x8c, "Decrement the top stack element in place.";
+    OP_2MUL => 0x8d, "Fail the script unconditionally, does not even need to be executed.";
+    OP_2DIV => 0x8e, "Fail the script unconditionally, does not even need to be executed.";
+    OP_NEGATE => 0x8f, "Multiply the top stack item by -1 in place.";
+    OP_ABS => 0x90, "Absolute value the top stack item in place.";
+    OP_NOT => 0x91, "Map 0 to 1 and everything else to 0, in place.";
+    OP_0NOTEQUAL => 0x92, "Map 0 to 0 and everything else to 1, in place.";
+    OP_ADD => 0x93, "Pop two stack items and push their sum.";
+    OP_SUB => 0x94, "Pop two stack items and push the second minus the top.";
+    OP_MUL => 0x95, "Fail the script unconditionally, does not even need to be executed.";
+    OP_DIV => 0x96, "Fail the script unconditionally, does not even need to be executed.";
+    OP_MOD => 0x97, "Fail the script unconditionally, does not even need to be executed.";
+    OP_LSHIFT => 0x98, "Fail the script unconditionally, does not even need to be executed.";
+    OP_RSHIFT => 0x99, "Fail the script unconditionally, does not even need to be executed.";
+    OP_BOOLAND => 0x9a, "Pop the top two stack items and push 1 if both are nonzero, else push 0.";
+    OP_BOOLOR => 0x9b, "Pop the top two stack items and push 1 if either is nonzero, else push 0.";
+    OP_NUMEQUAL => 0x9c, "Pop the top two stack items and push 1 if both are numerically equal, else push 0.";
+    OP_NUMEQUALVERIFY => 0x9d, "Pop the top two stack items and return success if both are numerically equal, else return failure.";
+    OP_NUMNOTEQUAL => 0x9e, "Pop the top two stack items and push 0 if both are numerically equal, else push 1.";
+    OP_LESSTHAN  => 0x9f, "Pop the top two items; push 1 if the second is less than the top, 0 otherwise.";
+    OP_GREATERTHAN  => 0xa0, "Pop the top two items; push 1 if the second is greater than the top, 0 otherwise.";
+    OP_LESSTHANOREQUAL  => 0xa1, "Pop the top two items; push 1 if the second is <= the top, 0 otherwise.";
+    OP_GREATERTHANOREQUAL  => 0xa2, "Pop the top two items; push 1 if the second is >= the top, 0 otherwise.";
+    OP_MIN => 0xa3, "Pop the top two items; push the smaller.";
+    OP_MAX => 0xa4, "Pop the top two items; push the larger.";
+    OP_WITHIN => 0xa5, "Pop the top three items; if the top is >= the second and < the third, push 1, otherwise push 0.";
+    OP_RIPEMD160 => 0xa6, "Pop the top stack item and push its RIPEMD160 hash.";
+    OP_SHA1 => 0xa7, "Pop the top stack item and push its SHA1 hash.";
+    OP_SHA256 => 0xa8, "Pop the top stack item and push its SHA256 hash.";
+    OP_HASH160 => 0xa9, "Pop the top stack item and push its RIPEMD(SHA256) hash.";
+    OP_HASH256 => 0xaa, "Pop the top stack item and push its SHA256(SHA256) hash.";
+    OP_CODESEPARATOR => 0xab, "Ignore this and everything preceding when deciding what to sign when signature-checking.";
+    OP_CHECKSIG => 0xac, "<https://en.bitcoin.it/wiki/OP_CHECKSIG> pushing 1/0 for success/failure.";
+    OP_CHECKSIGVERIFY => 0xad, "<https://en.bitcoin.it/wiki/OP_CHECKSIG> returning success/failure.";
+    OP_CHECKMULTISIG => 0xae, "Pop N, N pubkeys, M, M signatures, a dummy (due to bug in reference code), \
+                      and verify that all M signatures are valid. Push 1 for 'all valid', 0 otherwise.";
+    OP_CHECKMULTISIGVERIFY => 0xaf, "Like the above but return success/failure.";
+    OP_NOP1 => 0xb0, "Does nothing.";
+    OP_CLTV => 0xb1, "<https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki>";
+    OP_CSV => 0xb2, "<https://github.com/bitcoin/bips/blob/master/bip-0112.mediawiki>";
+    OP_NOP4 => 0xb3, "Does nothing.";
+    OP_NOP5 => 0xb4, "Does nothing.";
+    OP_NOP6 => 0xb5, "Does nothing.";
+    OP_NOP7 => 0xb6, "Does nothing.";
+    OP_NOP8 => 0xb7, "Does nothing.";
+    OP_NOP9 => 0xb8, "Does nothing.";
+    OP_NOP10 => 0xb9, "Does nothing.";
+    // Every other opcode acts as OP_RETURN
+    OP_CHECKSIGADD => 0xba, "OP_CHECKSIGADD post tapscript.";
+    OP_RETURN_187 => 0xbb, "Synonym for OP_RETURN.";
+    OP_RETURN_188 => 0xbc, "Synonym for OP_RETURN.";
+    OP_RETURN_189 => 0xbd, "Synonym for OP_RETURN.";
+    OP_RETURN_190 => 0xbe, "Synonym for OP_RETURN.";
+    OP_RETURN_191 => 0xbf, "Synonym for OP_RETURN.";
+    OP_RETURN_192 => 0xc0, "Synonym for OP_RETURN.";
+    OP_RETURN_193 => 0xc1, "Synonym for OP_RETURN.";
+    OP_RETURN_194 => 0xc2, "Synonym for OP_RETURN.";
+    OP_RETURN_195 => 0xc3, "Synonym for OP_RETURN.";
+    OP_RETURN_196 => 0xc4, "Synonym for OP_RETURN.";
+    OP_RETURN_197 => 0xc5, "Synonym for OP_RETURN.";
+    OP_RETURN_198 => 0xc6, "Synonym for OP_RETURN.";
+    OP_RETURN_199 => 0xc7, "Synonym for OP_RETURN.";
+    OP_RETURN_200 => 0xc8, "Synonym for OP_RETURN.";
+    OP_RETURN_201 => 0xc9, "Synonym for OP_RETURN.";
+    OP_RETURN_202 => 0xca, "Synonym for OP_RETURN.";
+    OP_RETURN_203 => 0xcb, "Synonym for OP_RETURN.";
+    OP_RETURN_204 => 0xcc, "Synonym for OP_RETURN.";
+    OP_RETURN_205 => 0xcd, "Synonym for OP_RETURN.";
+    OP_RETURN_206 => 0xce, "Synonym for OP_RETURN.";
+    OP_RETURN_207 => 0xcf, "Synonym for OP_RETURN.";
+    OP_RETURN_208 => 0xd0, "Synonym for OP_RETURN.";
+    OP_RETURN_209 => 0xd1, "Synonym for OP_RETURN.";
+    OP_RETURN_210 => 0xd2, "Synonym for OP_RETURN.";
+    OP_RETURN_211 => 0xd3, "Synonym for OP_RETURN.";
+    OP_RETURN_212 => 0xd4, "Synonym for OP_RETURN.";
+    OP_RETURN_213 => 0xd5, "Synonym for OP_RETURN.";
+    OP_RETURN_214 => 0xd6, "Synonym for OP_RETURN.";
+    OP_RETURN_215 => 0xd7, "Synonym for OP_RETURN.";
+    OP_RETURN_216 => 0xd8, "Synonym for OP_RETURN.";
+    OP_RETURN_217 => 0xd9, "Synonym for OP_RETURN.";
+    OP_RETURN_218 => 0xda, "Synonym for OP_RETURN.";
+    OP_RETURN_219 => 0xdb, "Synonym for OP_RETURN.";
+    OP_RETURN_220 => 0xdc, "Synonym for OP_RETURN.";
+    OP_RETURN_221 => 0xdd, "Synonym for OP_RETURN.";
+    OP_RETURN_222 => 0xde, "Synonym for OP_RETURN.";
+    OP_RETURN_223 => 0xdf, "Synonym for OP_RETURN.";
+    OP_RETURN_224 => 0xe0, "Synonym for OP_RETURN.";
+    OP_RETURN_225 => 0xe1, "Synonym for OP_RETURN.";
+    OP_RETURN_226 => 0xe2, "Synonym for OP_RETURN.";
+    OP_RETURN_227 => 0xe3, "Synonym for OP_RETURN.";
+    OP_RETURN_228 => 0xe4, "Synonym for OP_RETURN.";
+    OP_RETURN_229 => 0xe5, "Synonym for OP_RETURN.";
+    OP_RETURN_230 => 0xe6, "Synonym for OP_RETURN.";
+    OP_RETURN_231 => 0xe7, "Synonym for OP_RETURN.";
+    OP_RETURN_232 => 0xe8, "Synonym for OP_RETURN.";
+    OP_RETURN_233 => 0xe9, "Synonym for OP_RETURN.";
+    OP_RETURN_234 => 0xea, "Synonym for OP_RETURN.";
+    OP_RETURN_235 => 0xeb, "Synonym for OP_RETURN.";
+    OP_RETURN_236 => 0xec, "Synonym for OP_RETURN.";
+    OP_RETURN_237 => 0xed, "Synonym for OP_RETURN.";
+    OP_RETURN_238 => 0xee, "Synonym for OP_RETURN.";
+    OP_RETURN_239 => 0xef, "Synonym for OP_RETURN.";
+    OP_RETURN_240 => 0xf0, "Synonym for OP_RETURN.";
+    OP_RETURN_241 => 0xf1, "Synonym for OP_RETURN.";
+    OP_RETURN_242 => 0xf2, "Synonym for OP_RETURN.";
+    OP_RETURN_243 => 0xf3, "Synonym for OP_RETURN.";
+    OP_RETURN_244 => 0xf4, "Synonym for OP_RETURN.";
+    OP_RETURN_245 => 0xf5, "Synonym for OP_RETURN.";
+    OP_RETURN_246 => 0xf6, "Synonym for OP_RETURN.";
+    OP_RETURN_247 => 0xf7, "Synonym for OP_RETURN.";
+    OP_RETURN_248 => 0xf8, "Synonym for OP_RETURN.";
+    OP_RETURN_249 => 0xf9, "Synonym for OP_RETURN.";
+    OP_RETURN_250 => 0xfa, "Synonym for OP_RETURN.";
+    OP_RETURN_251 => 0xfb, "Synonym for OP_RETURN.";
+    OP_RETURN_252 => 0xfc, "Synonym for OP_RETURN.";
+    OP_RETURN_253 => 0xfd, "Synonym for OP_RETURN.";
+    OP_RETURN_254 => 0xfe, "Synonym for OP_RETURN.";
+    OP_INVALIDOPCODE => 0xff, "Synonym for OP_RETURN."
+}
+
+/// Classification context for the opcode.
+///
+/// Some opcodes like [`OP_RESERVED`] abort the script in `ClassifyContext::Legacy` context,
+/// but will act as `OP_SUCCESSx` in `ClassifyContext::TapScript` (see BIP342 for full list).
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum ClassifyContext {
+    /// Opcode used in tapscript context.
+    TapScript,
+    /// Opcode used in legacy context.
+    Legacy,
+}
+
+impl All {
+    /// Classifies an Opcode into a broad class.
+    #[inline]
+    pub fn classify(self, ctx: ClassifyContext) -> Class {
+        match (self, ctx) {
+            // 3 opcodes illegal in all contexts
+            (OP_VERIF, _) | (OP_VERNOTIF, _) | (OP_INVALIDOPCODE, _) => Class::IllegalOp,
+
+            // 15 opcodes illegal in Legacy context
+            #[rustfmt::skip]
+            (OP_CAT, ctx) | (OP_SUBSTR, ctx)
+            | (OP_LEFT, ctx) | (OP_RIGHT, ctx)
+            | (OP_INVERT, ctx)
+            | (OP_AND, ctx) | (OP_OR, ctx) | (OP_XOR, ctx)
+            | (OP_2MUL, ctx) | (OP_2DIV, ctx)
+            | (OP_MUL, ctx) | (OP_DIV, ctx) | (OP_MOD, ctx)
+            | (OP_LSHIFT, ctx) | (OP_RSHIFT, ctx) if ctx == ClassifyContext::Legacy => Class::IllegalOp,
+
+            // 87 opcodes of SuccessOp class only in TapScript context
+            (op, ClassifyContext::TapScript)
+                if op.code == 80
+                    || op.code == 98
+                    || (op.code >= 126 && op.code <= 129)
+                    || (op.code >= 131 && op.code <= 134)
+                    || (op.code >= 137 && op.code <= 138)
+                    || (op.code >= 141 && op.code <= 142)
+                    || (op.code >= 149 && op.code <= 153)
+                    || (op.code >= 187 && op.code <= 254) =>
+                Class::SuccessOp,
+
+            // 11 opcodes of NoOp class
+            (OP_NOP, _) => Class::NoOp,
+            (op, _) if op.code >= OP_NOP1.code && op.code <= OP_NOP10.code => Class::NoOp,
+
+            // 1 opcode for `OP_RETURN`
+            (OP_RETURN, _) => Class::ReturnOp,
+
+            // 4 opcodes operating equally to `OP_RETURN` only in Legacy context
+            (OP_RESERVED, ctx) | (OP_RESERVED1, ctx) | (OP_RESERVED2, ctx) | (OP_VER, ctx)
+                if ctx == ClassifyContext::Legacy =>
+                Class::ReturnOp,
+
+            // 71 opcodes operating equally to `OP_RETURN` only in Legacy context
+            (op, ClassifyContext::Legacy) if op.code >= OP_CHECKSIGADD.code => Class::ReturnOp,
+
+            // 2 opcodes operating equally to `OP_RETURN` only in TapScript context
+            (OP_CHECKMULTISIG, ClassifyContext::TapScript)
+            | (OP_CHECKMULTISIGVERIFY, ClassifyContext::TapScript) => Class::ReturnOp,
+
+            // 1 opcode of PushNum class
+            (OP_PUSHNUM_NEG1, _) => Class::PushNum(-1),
+
+            // 16 opcodes of PushNum class
+            (op, _) if op.code >= OP_PUSHNUM_1.code && op.code <= OP_PUSHNUM_16.code =>
+                Class::PushNum(1 + self.code as i32 - OP_PUSHNUM_1.code as i32),
+
+            // 76 opcodes of PushBytes class
+            (op, _) if op.code <= OP_PUSHBYTES_75.code => Class::PushBytes(self.code as u32),
+
+            // opcodes of Ordinary class: 61 for Legacy and 60 for TapScript context
+            (_, _) => Class::Ordinary(Ordinary::with(self)),
+        }
+    }
+
+    /// Encodes [`All`] as a byte.
+    #[inline]
+    pub const fn to_u8(self) -> u8 { self.code }
+}
+
+impl From<u8> for All {
+    #[inline]
+    fn from(b: u8) -> All { All { code: b } }
+}
+
+debug_from_display!(All);
+
+#[cfg(feature = "serde")]
+impl serde::Serialize for All {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        serializer.serialize_str(&self.to_string())
+    }
+}
+
+/// Push an empty array onto the stack.
+pub static OP_0: All = OP_PUSHBYTES_0;
+/// Empty stack is also FALSE.
+pub static OP_FALSE: All = OP_PUSHBYTES_0;
+/// Number 1 is also TRUE.
+pub static OP_TRUE: All = OP_PUSHNUM_1;
+/// Previously called OP_NOP2.
+pub static OP_NOP2: All = OP_CLTV;
+/// Previously called OP_NOP3.
+pub static OP_NOP3: All = OP_CSV;
+
+/// Broad categories of opcodes with similar behavior.
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+pub enum Class {
+    /// Pushes the given number onto the stack.
+    PushNum(i32),
+    /// Pushes the given number of bytes onto the stack.
+    PushBytes(u32),
+    /// Fails the script if executed.
+    ReturnOp,
+    /// Succeeds the script even if not executed.
+    SuccessOp,
+    /// Fails the script even if not executed.
+    IllegalOp,
+    /// Does nothing.
+    NoOp,
+    /// Any opcode not covered above.
+    Ordinary(Ordinary),
+}
+
+macro_rules! ordinary_opcode {
+    ($($op:ident),*) => (
+        #[repr(u8)]
+        #[doc(hidden)]
+        #[derive(Copy, Clone, PartialEq, Eq, Debug)]
+        pub enum Ordinary {
+            $( $op = $op.code ),*
+        }
+
+        impl fmt::Display for Ordinary {
+            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+                match *self {
+                   $(Ordinary::$op => { f.pad(stringify!($op)) }),*
+                }
+            }
+        }
+
+        impl Ordinary {
+            fn with(b: All) -> Self {
+                match b {
+                    $( $op => { Ordinary::$op } ),*
+                    _ => unreachable!("construction of `Ordinary` type from non-ordinary opcode {}", b),
+                }
+            }
+
+            /// Try to create from an All
+            pub fn try_from_all(b: All) -> Option<Self> {
+                match b {
+                    $( $op => { Some(Ordinary::$op) } ),*
+                    _ => None,
+                }
+            }
+        }
+    );
+}
+
+// "Ordinary" opcodes -- should be 61 of these
+ordinary_opcode! {
+    // pushdata
+    OP_PUSHDATA1, OP_PUSHDATA2, OP_PUSHDATA4,
+    // control flow
+    OP_IF, OP_NOTIF, OP_ELSE, OP_ENDIF, OP_VERIFY,
+    // stack
+    OP_TOALTSTACK, OP_FROMALTSTACK,
+    OP_2DROP, OP_2DUP, OP_3DUP, OP_2OVER, OP_2ROT, OP_2SWAP,
+    OP_DROP, OP_DUP, OP_NIP, OP_OVER, OP_PICK, OP_ROLL, OP_ROT, OP_SWAP, OP_TUCK,
+    OP_IFDUP, OP_DEPTH, OP_SIZE,
+    // equality
+    OP_EQUAL, OP_EQUALVERIFY,
+    // arithmetic
+    OP_1ADD, OP_1SUB, OP_NEGATE, OP_ABS, OP_NOT, OP_0NOTEQUAL,
+    OP_ADD, OP_SUB, OP_BOOLAND, OP_BOOLOR,
+    OP_NUMEQUAL, OP_NUMEQUALVERIFY, OP_NUMNOTEQUAL, OP_LESSTHAN,
+    OP_GREATERTHAN, OP_LESSTHANOREQUAL, OP_GREATERTHANOREQUAL,
+    OP_MIN, OP_MAX, OP_WITHIN,
+    // crypto
+    OP_RIPEMD160, OP_SHA1, OP_SHA256, OP_HASH160, OP_HASH256,
+    OP_CODESEPARATOR, OP_CHECKSIG, OP_CHECKSIGVERIFY,
+    OP_CHECKMULTISIG, OP_CHECKMULTISIGVERIFY,
+    OP_CHECKSIGADD
+}
+
+impl Ordinary {
+    /// Encodes [`All`] as a byte.
+    #[inline]
+    pub fn to_u8(self) -> u8 { self as u8 }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::collections::HashSet;
+
+    use super::*;
+
+    macro_rules! roundtrip {
+        ($unique:expr, $op:ident) => {
+            assert_eq!($op, All::from($op.to_u8()));
+
+            let s1 = format!("{}", $op);
+            let s2 = format!("{:?}", $op);
+            assert_eq!(s1, s2);
+            assert_eq!(s1, stringify!($op));
+            assert!($unique.insert(s1));
+        };
+    }
+
+    #[test]
+    fn formatting_works() {
+        let op = all::OP_NOP;
+        let s = format!("{:>10}", op);
+        assert_eq!(s, "    OP_NOP");
+    }
+
+    #[test]
+    fn classify_test() {
+        let op174 = OP_CHECKMULTISIG;
+        assert_eq!(
+            op174.classify(ClassifyContext::Legacy),
+            Class::Ordinary(Ordinary::OP_CHECKMULTISIG)
+        );
+        assert_eq!(op174.classify(ClassifyContext::TapScript), Class::ReturnOp);
+
+        let op175 = OP_CHECKMULTISIGVERIFY;
+        assert_eq!(
+            op175.classify(ClassifyContext::Legacy),
+            Class::Ordinary(Ordinary::OP_CHECKMULTISIGVERIFY)
+        );
+        assert_eq!(op175.classify(ClassifyContext::TapScript), Class::ReturnOp);
+
+        let op186 = OP_CHECKSIGADD;
+        assert_eq!(op186.classify(ClassifyContext::Legacy), Class::ReturnOp);
+        assert_eq!(
+            op186.classify(ClassifyContext::TapScript),
+            Class::Ordinary(Ordinary::OP_CHECKSIGADD)
+        );
+
+        let op187 = OP_RETURN_187;
+        assert_eq!(op187.classify(ClassifyContext::Legacy), Class::ReturnOp);
+        assert_eq!(op187.classify(ClassifyContext::TapScript), Class::SuccessOp);
+    }
+
+    #[test]
+    fn str_roundtrip() {
+        let mut unique = HashSet::new();
+        roundtrip!(unique, OP_PUSHBYTES_0);
+        roundtrip!(unique, OP_PUSHBYTES_1);
+        roundtrip!(unique, OP_PUSHBYTES_2);
+        roundtrip!(unique, OP_PUSHBYTES_3);
+        roundtrip!(unique, OP_PUSHBYTES_4);
+        roundtrip!(unique, OP_PUSHBYTES_5);
+        roundtrip!(unique, OP_PUSHBYTES_6);
+        roundtrip!(unique, OP_PUSHBYTES_7);
+        roundtrip!(unique, OP_PUSHBYTES_8);
+        roundtrip!(unique, OP_PUSHBYTES_9);
+        roundtrip!(unique, OP_PUSHBYTES_10);
+        roundtrip!(unique, OP_PUSHBYTES_11);
+        roundtrip!(unique, OP_PUSHBYTES_12);
+        roundtrip!(unique, OP_PUSHBYTES_13);
+        roundtrip!(unique, OP_PUSHBYTES_14);
+        roundtrip!(unique, OP_PUSHBYTES_15);
+        roundtrip!(unique, OP_PUSHBYTES_16);
+        roundtrip!(unique, OP_PUSHBYTES_17);
+        roundtrip!(unique, OP_PUSHBYTES_18);
+        roundtrip!(unique, OP_PUSHBYTES_19);
+        roundtrip!(unique, OP_PUSHBYTES_20);
+        roundtrip!(unique, OP_PUSHBYTES_21);
+        roundtrip!(unique, OP_PUSHBYTES_22);
+        roundtrip!(unique, OP_PUSHBYTES_23);
+        roundtrip!(unique, OP_PUSHBYTES_24);
+        roundtrip!(unique, OP_PUSHBYTES_25);
+        roundtrip!(unique, OP_PUSHBYTES_26);
+        roundtrip!(unique, OP_PUSHBYTES_27);
+        roundtrip!(unique, OP_PUSHBYTES_28);
+        roundtrip!(unique, OP_PUSHBYTES_29);
+        roundtrip!(unique, OP_PUSHBYTES_30);
+        roundtrip!(unique, OP_PUSHBYTES_31);
+        roundtrip!(unique, OP_PUSHBYTES_32);
+        roundtrip!(unique, OP_PUSHBYTES_33);
+        roundtrip!(unique, OP_PUSHBYTES_34);
+        roundtrip!(unique, OP_PUSHBYTES_35);
+        roundtrip!(unique, OP_PUSHBYTES_36);
+        roundtrip!(unique, OP_PUSHBYTES_37);
+        roundtrip!(unique, OP_PUSHBYTES_38);
+        roundtrip!(unique, OP_PUSHBYTES_39);
+        roundtrip!(unique, OP_PUSHBYTES_40);
+        roundtrip!(unique, OP_PUSHBYTES_41);
+        roundtrip!(unique, OP_PUSHBYTES_42);
+        roundtrip!(unique, OP_PUSHBYTES_43);
+        roundtrip!(unique, OP_PUSHBYTES_44);
+        roundtrip!(unique, OP_PUSHBYTES_45);
+        roundtrip!(unique, OP_PUSHBYTES_46);
+        roundtrip!(unique, OP_PUSHBYTES_47);
+        roundtrip!(unique, OP_PUSHBYTES_48);
+        roundtrip!(unique, OP_PUSHBYTES_49);
+        roundtrip!(unique, OP_PUSHBYTES_50);
+        roundtrip!(unique, OP_PUSHBYTES_51);
+        roundtrip!(unique, OP_PUSHBYTES_52);
+        roundtrip!(unique, OP_PUSHBYTES_53);
+        roundtrip!(unique, OP_PUSHBYTES_54);
+        roundtrip!(unique, OP_PUSHBYTES_55);
+        roundtrip!(unique, OP_PUSHBYTES_56);
+        roundtrip!(unique, OP_PUSHBYTES_57);
+        roundtrip!(unique, OP_PUSHBYTES_58);
+        roundtrip!(unique, OP_PUSHBYTES_59);
+        roundtrip!(unique, OP_PUSHBYTES_60);
+        roundtrip!(unique, OP_PUSHBYTES_61);
+        roundtrip!(unique, OP_PUSHBYTES_62);
+        roundtrip!(unique, OP_PUSHBYTES_63);
+        roundtrip!(unique, OP_PUSHBYTES_64);
+        roundtrip!(unique, OP_PUSHBYTES_65);
+        roundtrip!(unique, OP_PUSHBYTES_66);
+        roundtrip!(unique, OP_PUSHBYTES_67);
+        roundtrip!(unique, OP_PUSHBYTES_68);
+        roundtrip!(unique, OP_PUSHBYTES_69);
+        roundtrip!(unique, OP_PUSHBYTES_70);
+        roundtrip!(unique, OP_PUSHBYTES_71);
+        roundtrip!(unique, OP_PUSHBYTES_72);
+        roundtrip!(unique, OP_PUSHBYTES_73);
+        roundtrip!(unique, OP_PUSHBYTES_74);
+        roundtrip!(unique, OP_PUSHBYTES_75);
+        roundtrip!(unique, OP_PUSHDATA1);
+        roundtrip!(unique, OP_PUSHDATA2);
+        roundtrip!(unique, OP_PUSHDATA4);
+        roundtrip!(unique, OP_PUSHNUM_NEG1);
+        roundtrip!(unique, OP_RESERVED);
+        roundtrip!(unique, OP_PUSHNUM_1);
+        roundtrip!(unique, OP_PUSHNUM_2);
+        roundtrip!(unique, OP_PUSHNUM_3);
+        roundtrip!(unique, OP_PUSHNUM_4);
+        roundtrip!(unique, OP_PUSHNUM_5);
+        roundtrip!(unique, OP_PUSHNUM_6);
+        roundtrip!(unique, OP_PUSHNUM_7);
+        roundtrip!(unique, OP_PUSHNUM_8);
+        roundtrip!(unique, OP_PUSHNUM_9);
+        roundtrip!(unique, OP_PUSHNUM_10);
+        roundtrip!(unique, OP_PUSHNUM_11);
+        roundtrip!(unique, OP_PUSHNUM_12);
+        roundtrip!(unique, OP_PUSHNUM_13);
+        roundtrip!(unique, OP_PUSHNUM_14);
+        roundtrip!(unique, OP_PUSHNUM_15);
+        roundtrip!(unique, OP_PUSHNUM_16);
+        roundtrip!(unique, OP_NOP);
+        roundtrip!(unique, OP_VER);
+        roundtrip!(unique, OP_IF);
+        roundtrip!(unique, OP_NOTIF);
+        roundtrip!(unique, OP_VERIF);
+        roundtrip!(unique, OP_VERNOTIF);
+        roundtrip!(unique, OP_ELSE);
+        roundtrip!(unique, OP_ENDIF);
+        roundtrip!(unique, OP_VERIFY);
+        roundtrip!(unique, OP_RETURN);
+        roundtrip!(unique, OP_TOALTSTACK);
+        roundtrip!(unique, OP_FROMALTSTACK);
+        roundtrip!(unique, OP_2DROP);
+        roundtrip!(unique, OP_2DUP);
+        roundtrip!(unique, OP_3DUP);
+        roundtrip!(unique, OP_2OVER);
+        roundtrip!(unique, OP_2ROT);
+        roundtrip!(unique, OP_2SWAP);
+        roundtrip!(unique, OP_IFDUP);
+        roundtrip!(unique, OP_DEPTH);
+        roundtrip!(unique, OP_DROP);
+        roundtrip!(unique, OP_DUP);
+        roundtrip!(unique, OP_NIP);
+        roundtrip!(unique, OP_OVER);
+        roundtrip!(unique, OP_PICK);
+        roundtrip!(unique, OP_ROLL);
+        roundtrip!(unique, OP_ROT);
+        roundtrip!(unique, OP_SWAP);
+        roundtrip!(unique, OP_TUCK);
+        roundtrip!(unique, OP_CAT);
+        roundtrip!(unique, OP_SUBSTR);
+        roundtrip!(unique, OP_LEFT);
+        roundtrip!(unique, OP_RIGHT);
+        roundtrip!(unique, OP_SIZE);
+        roundtrip!(unique, OP_INVERT);
+        roundtrip!(unique, OP_AND);
+        roundtrip!(unique, OP_OR);
+        roundtrip!(unique, OP_XOR);
+        roundtrip!(unique, OP_EQUAL);
+        roundtrip!(unique, OP_EQUALVERIFY);
+        roundtrip!(unique, OP_RESERVED1);
+        roundtrip!(unique, OP_RESERVED2);
+        roundtrip!(unique, OP_1ADD);
+        roundtrip!(unique, OP_1SUB);
+        roundtrip!(unique, OP_2MUL);
+        roundtrip!(unique, OP_2DIV);
+        roundtrip!(unique, OP_NEGATE);
+        roundtrip!(unique, OP_ABS);
+        roundtrip!(unique, OP_NOT);
+        roundtrip!(unique, OP_0NOTEQUAL);
+        roundtrip!(unique, OP_ADD);
+        roundtrip!(unique, OP_SUB);
+        roundtrip!(unique, OP_MUL);
+        roundtrip!(unique, OP_DIV);
+        roundtrip!(unique, OP_MOD);
+        roundtrip!(unique, OP_LSHIFT);
+        roundtrip!(unique, OP_RSHIFT);
+        roundtrip!(unique, OP_BOOLAND);
+        roundtrip!(unique, OP_BOOLOR);
+        roundtrip!(unique, OP_NUMEQUAL);
+        roundtrip!(unique, OP_NUMEQUALVERIFY);
+        roundtrip!(unique, OP_NUMNOTEQUAL);
+        roundtrip!(unique, OP_LESSTHAN);
+        roundtrip!(unique, OP_GREATERTHAN);
+        roundtrip!(unique, OP_LESSTHANOREQUAL);
+        roundtrip!(unique, OP_GREATERTHANOREQUAL);
+        roundtrip!(unique, OP_MIN);
+        roundtrip!(unique, OP_MAX);
+        roundtrip!(unique, OP_WITHIN);
+        roundtrip!(unique, OP_RIPEMD160);
+        roundtrip!(unique, OP_SHA1);
+        roundtrip!(unique, OP_SHA256);
+        roundtrip!(unique, OP_HASH160);
+        roundtrip!(unique, OP_HASH256);
+        roundtrip!(unique, OP_CODESEPARATOR);
+        roundtrip!(unique, OP_CHECKSIG);
+        roundtrip!(unique, OP_CHECKSIGVERIFY);
+        roundtrip!(unique, OP_CHECKMULTISIG);
+        roundtrip!(unique, OP_CHECKMULTISIGVERIFY);
+        roundtrip!(unique, OP_NOP1);
+        roundtrip!(unique, OP_CLTV);
+        roundtrip!(unique, OP_CSV);
+        roundtrip!(unique, OP_NOP4);
+        roundtrip!(unique, OP_NOP5);
+        roundtrip!(unique, OP_NOP6);
+        roundtrip!(unique, OP_NOP7);
+        roundtrip!(unique, OP_NOP8);
+        roundtrip!(unique, OP_NOP9);
+        roundtrip!(unique, OP_NOP10);
+        roundtrip!(unique, OP_CHECKSIGADD);
+        roundtrip!(unique, OP_RETURN_187);
+        roundtrip!(unique, OP_RETURN_188);
+        roundtrip!(unique, OP_RETURN_189);
+        roundtrip!(unique, OP_RETURN_190);
+        roundtrip!(unique, OP_RETURN_191);
+        roundtrip!(unique, OP_RETURN_192);
+        roundtrip!(unique, OP_RETURN_193);
+        roundtrip!(unique, OP_RETURN_194);
+        roundtrip!(unique, OP_RETURN_195);
+        roundtrip!(unique, OP_RETURN_196);
+        roundtrip!(unique, OP_RETURN_197);
+        roundtrip!(unique, OP_RETURN_198);
+        roundtrip!(unique, OP_RETURN_199);
+        roundtrip!(unique, OP_RETURN_200);
+        roundtrip!(unique, OP_RETURN_201);
+        roundtrip!(unique, OP_RETURN_202);
+        roundtrip!(unique, OP_RETURN_203);
+        roundtrip!(unique, OP_RETURN_204);
+        roundtrip!(unique, OP_RETURN_205);
+        roundtrip!(unique, OP_RETURN_206);
+        roundtrip!(unique, OP_RETURN_207);
+        roundtrip!(unique, OP_RETURN_208);
+        roundtrip!(unique, OP_RETURN_209);
+        roundtrip!(unique, OP_RETURN_210);
+        roundtrip!(unique, OP_RETURN_211);
+        roundtrip!(unique, OP_RETURN_212);
+        roundtrip!(unique, OP_RETURN_213);
+        roundtrip!(unique, OP_RETURN_214);
+        roundtrip!(unique, OP_RETURN_215);
+        roundtrip!(unique, OP_RETURN_216);
+        roundtrip!(unique, OP_RETURN_217);
+        roundtrip!(unique, OP_RETURN_218);
+        roundtrip!(unique, OP_RETURN_219);
+        roundtrip!(unique, OP_RETURN_220);
+        roundtrip!(unique, OP_RETURN_221);
+        roundtrip!(unique, OP_RETURN_222);
+        roundtrip!(unique, OP_RETURN_223);
+        roundtrip!(unique, OP_RETURN_224);
+        roundtrip!(unique, OP_RETURN_225);
+        roundtrip!(unique, OP_RETURN_226);
+        roundtrip!(unique, OP_RETURN_227);
+        roundtrip!(unique, OP_RETURN_228);
+        roundtrip!(unique, OP_RETURN_229);
+        roundtrip!(unique, OP_RETURN_230);
+        roundtrip!(unique, OP_RETURN_231);
+        roundtrip!(unique, OP_RETURN_232);
+        roundtrip!(unique, OP_RETURN_233);
+        roundtrip!(unique, OP_RETURN_234);
+        roundtrip!(unique, OP_RETURN_235);
+        roundtrip!(unique, OP_RETURN_236);
+        roundtrip!(unique, OP_RETURN_237);
+        roundtrip!(unique, OP_RETURN_238);
+        roundtrip!(unique, OP_RETURN_239);
+        roundtrip!(unique, OP_RETURN_240);
+        roundtrip!(unique, OP_RETURN_241);
+        roundtrip!(unique, OP_RETURN_242);
+        roundtrip!(unique, OP_RETURN_243);
+        roundtrip!(unique, OP_RETURN_244);
+        roundtrip!(unique, OP_RETURN_245);
+        roundtrip!(unique, OP_RETURN_246);
+        roundtrip!(unique, OP_RETURN_247);
+        roundtrip!(unique, OP_RETURN_248);
+        roundtrip!(unique, OP_RETURN_249);
+        roundtrip!(unique, OP_RETURN_250);
+        roundtrip!(unique, OP_RETURN_251);
+        roundtrip!(unique, OP_RETURN_252);
+        roundtrip!(unique, OP_RETURN_253);
+        roundtrip!(unique, OP_RETURN_254);
+        roundtrip!(unique, OP_INVALIDOPCODE);
+        assert_eq!(unique.len(), 256);
+    }
+}
diff --git a/dash/src/blockdata/script/borrowed.rs b/dash/src/blockdata/script/borrowed.rs
new file mode 100644
index 000000000..b707f12d0
--- /dev/null
+++ b/dash/src/blockdata/script/borrowed.rs
@@ -0,0 +1,504 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+use core::convert::{TryFrom, TryInto};
+use core::fmt;
+#[cfg(rust_v_1_53)]
+use core::ops::Bound;
+use core::ops::{Index, Range, RangeFrom, RangeFull, RangeInclusive, RangeTo, RangeToInclusive};
+
+use hashes::Hash;
+use secp256k1::{Secp256k1, Verification};
+
+use crate::address::WitnessVersion;
+use crate::blockdata::opcodes::all::*;
+use crate::blockdata::opcodes::{self};
+#[cfg(feature = "bitcoinconsensus")]
+use crate::blockdata::script::Error;
+use crate::blockdata::script::{
+    bytes_to_asm_fmt, Builder, Instruction, InstructionIndices, Instructions, ScriptBuf,
+};
+use crate::consensus::Encodable;
+use crate::hash_types::{ScriptHash, WScriptHash};
+use crate::key::{PublicKey, UntweakedPublicKey};
+use crate::policy::DUST_RELAY_TX_FEE;
+use crate::prelude::*;
+use crate::taproot::{LeafVersion, TapLeafHash, TapNodeHash};
+
+/// Bitcoin script slice.
+///
+/// *[See also the `dash::blockdata::script` module](crate::blockdata::script).*
+///
+/// `Script` is a script slice, the most primitive script type. It's usually seen in its borrowed
+/// form `&Script`. It is always encoded as a series of bytes representing the opcodes and data
+/// pushes.
+///
+/// ## Validity
+///
+/// `Script` does not have any validity invariants - it's essentially just a marked slice of
+/// bytes. This is similar to [`Path`](std::path::Path) vs [`OsStr`](std::ffi::OsStr) where they
+/// are trivially cast-able to each-other and `Path` doesn't guarantee being a usable FS path but
+/// having a newtype still has value because of added methods, readability and basic type checking.
+///
+/// Although at least data pushes could be checked not to overflow the script, bad scripts are
+/// allowed to be in a transaction (outputs just become unspendable) and there even are such
+/// transactions in the chain. Thus we must allow such scripts to be placed in the transaction.
+///
+/// ## Slicing safety
+///
+/// Slicing is similar to how `str` works: some ranges may be incorrect and indexing by
+/// `usize` is not supported. However, as opposed to `std`, we have no way of checking
+/// correctness without causing linear complexity so there are **no panics on invalid
+/// ranges!** If you supply an invalid range, you'll get a garbled script.
+///
+/// The range is considered valid if it's at a boundary of instruction. Care must be taken
+/// especially with push operations because you could get a reference to arbitrary
+/// attacker-supplied bytes that look like a valid script.
+///
+/// It is recommended to use `.instructions()` method to get an iterator over script
+/// instructions and work with that instead.
+///
+/// ## Memory safety
+///
+/// The type is `#[repr(transparent)]` for internal purposes only!
+/// No consumer crate may rely on the represenation of the struct!
+///
+/// ## References
+///
+///
+/// ### Bitcoin Core References
+///
+/// * [CScript definition](https://github.com/bitcoin/bitcoin/blob/d492dc1cdaabdc52b0766bf4cba4bd73178325d0/src/script/script.h#L410)
+///
+#[derive(PartialOrd, Ord, PartialEq, Eq, Hash)]
+#[repr(transparent)]
+pub struct Script(pub [u8]);
+
+impl ToOwned for Script {
+    type Owned = ScriptBuf;
+
+    fn to_owned(&self) -> Self::Owned { ScriptBuf(self.0.to_owned()) }
+}
+
+impl Script {
+    /// Treat byte slice as `Script`
+    #[inline]
+    pub fn from_bytes(bytes: &[u8]) -> &Script {
+        // SAFETY: copied from `std`
+        // The pointer was just created from a reference which is still alive.
+        // Casting slice pointer to a transparent struct wrapping that slice is sound (same
+        // layout).
+        unsafe { &*(bytes as *const [u8] as *const Script) }
+    }
+
+    /// Treat mutable byte slice as `Script`
+    #[inline]
+    pub fn from_bytes_mut(bytes: &mut [u8]) -> &mut Script {
+        // SAFETY: copied from `std`
+        // The pointer was just created from a reference which is still alive.
+        // Casting slice pointer to a transparent struct wrapping that slice is sound (same
+        // layout).
+        // Function signature prevents callers from accessing `bytes` while the returned reference
+        // is alive.
+        unsafe { &mut *(bytes as *mut [u8] as *mut Script) }
+    }
+
+    /// Returns the script data as a byte slice.
+    #[inline]
+    pub fn as_bytes(&self) -> &[u8] { &self.0 }
+
+    /// Returns the script data as a mutable byte slice.
+    #[inline]
+    pub fn as_mut_bytes(&mut self) -> &mut [u8] { &mut self.0 }
+
+    /// Creates a new empty script.
+    #[inline]
+    pub fn empty() -> &'static Script { Script::from_bytes(&[]) }
+
+    /// Creates a new script builder
+    pub fn builder() -> Builder { Builder::new() }
+
+    /// Returns 160-bit hash of the script.
+    #[inline]
+    pub fn script_hash(&self) -> ScriptHash { ScriptHash::hash(self.as_bytes()) }
+
+    /// Returns 256-bit hash of the script for P2WSH outputs.
+    #[inline]
+    pub fn wscript_hash(&self) -> WScriptHash { WScriptHash::hash(self.as_bytes()) }
+
+    /// Computes leaf hash of tapscript.
+    #[inline]
+    pub fn tapscript_leaf_hash(&self) -> TapLeafHash {
+        TapLeafHash::from_script(self, LeafVersion::TapScript)
+    }
+
+    /// Returns the length in bytes of the script.
+    #[inline]
+    pub fn len(&self) -> usize { self.0.len() }
+
+    /// Returns whether the script is the empty script.
+    #[inline]
+    pub fn is_empty(&self) -> bool { self.0.is_empty() }
+
+    /// Returns a copy of the script data.
+    #[inline]
+    pub fn to_bytes(&self) -> Vec<u8> { self.0.to_owned() }
+
+    /// Returns an iterator over script bytes.
+    #[inline]
+    pub fn bytes(&self) -> Bytes<'_> { Bytes(self.as_bytes().iter().copied()) }
+
+    /// Computes the P2WSH output corresponding to this witnessScript (aka the "witness redeem
+    /// script").
+    #[inline]
+    pub fn to_v0_p2wsh(&self) -> ScriptBuf { ScriptBuf::new_v0_p2wsh(&self.wscript_hash()) }
+
+    /// Computes P2TR output with a given internal key and a single script spending path equal to
+    /// the current script, assuming that the script is a Tapscript.
+    #[inline]
+    pub fn to_v1_p2tr<C: Verification>(
+        &self,
+        secp: &Secp256k1<C>,
+        internal_key: UntweakedPublicKey,
+    ) -> ScriptBuf {
+        let leaf_hash = self.tapscript_leaf_hash();
+        let merkle_root = TapNodeHash::from(leaf_hash);
+        ScriptBuf::new_v1_p2tr(secp, internal_key, Some(merkle_root))
+    }
+
+    /// Returns witness version of the script, if any, assuming the script is a `scriptPubkey`.
+    #[inline]
+    pub fn witness_version(&self) -> Option<WitnessVersion> {
+        self.0.first().and_then(|opcode| WitnessVersion::try_from(opcodes::All::from(*opcode)).ok())
+    }
+
+    /// Checks whether a script pubkey is a P2SH output.
+    #[inline]
+    pub fn is_p2sh(&self) -> bool {
+        self.0.len() == 23
+            && self.0[0] == OP_HASH160.to_u8()
+            && self.0[1] == OP_PUSHBYTES_20.to_u8()
+            && self.0[22] == OP_EQUAL.to_u8()
+    }
+
+    /// Checks whether a script pubkey is a P2PKH output.
+    #[inline]
+    pub fn is_p2pkh(&self) -> bool {
+        self.0.len() == 25
+            && self.0[0] == OP_DUP.to_u8()
+            && self.0[1] == OP_HASH160.to_u8()
+            && self.0[2] == OP_PUSHBYTES_20.to_u8()
+            && self.0[23] == OP_EQUALVERIFY.to_u8()
+            && self.0[24] == OP_CHECKSIG.to_u8()
+    }
+
+    /// Checks whether a script pubkey is a P2PK output.
+    ///
+    /// You can obtain the public key, if its valid,
+    /// by calling [`p2pk_public_key()`](Self::p2pk_public_key)
+    #[inline]
+    pub fn is_p2pk(&self) -> bool { self.p2pk_pubkey_bytes().is_some() }
+
+    /// Returns the public key if this script is P2PK with a **valid** public key.
+    ///
+    /// This may return `None` even when [`is_p2pk()`](Self::is_p2pk) returns true.
+    /// This happens when the public key is invalid (e.g. the point not being on the curve).
+    /// It also implies the script is unspendable.
+    #[inline]
+    pub fn p2pk_public_key(&self) -> Option<PublicKey> {
+        PublicKey::from_slice(self.p2pk_pubkey_bytes()?).ok()
+    }
+
+    /// Returns the bytes of the (possibly invalid) public key if this script is P2PK.
+    #[inline]
+    pub fn p2pk_pubkey_bytes(&self) -> Option<&[u8]> {
+        match self.len() {
+            67 if self.0[0] == OP_PUSHBYTES_65.to_u8() && self.0[66] == OP_CHECKSIG.to_u8() =>
+                Some(&self.0[1..66]),
+            35 if self.0[0] == OP_PUSHBYTES_33.to_u8() && self.0[34] == OP_CHECKSIG.to_u8() =>
+                Some(&self.0[1..34]),
+            _ => None,
+        }
+    }
+
+    /// Checks whether a script pubkey is a Segregated Witness (segwit) program.
+    #[inline]
+    pub fn is_witness_program(&self) -> bool {
+        // A scriptPubKey (or redeemScript as defined in BIP16/P2SH) that consists of a 1-byte
+        // push opcode (for 0 to 16) followed by a data push between 2 and 40 bytes gets a new
+        // special meaning. The value of the first push is called the "version byte". The following
+        // byte vector pushed is called the "witness program".
+        let script_len = self.0.len();
+        if !(4..=42).contains(&script_len) {
+            return false;
+        }
+        let ver_opcode = opcodes::All::from(self.0[0]); // Version 0 or PUSHNUM_1-PUSHNUM_16
+        let push_opbyte = self.0[1]; // Second byte push opcode 2-40 bytes
+        WitnessVersion::try_from(ver_opcode).is_ok()
+            && push_opbyte >= OP_PUSHBYTES_2.to_u8()
+            && push_opbyte <= OP_PUSHBYTES_40.to_u8()
+            // Check that the rest of the script has the correct size
+            && script_len - 2 == push_opbyte as usize
+    }
+
+    /// Checks whether a script pubkey is a P2WSH output.
+    #[inline]
+    pub fn is_v0_p2wsh(&self) -> bool {
+        self.0.len() == 34
+            && self.witness_version() == Some(WitnessVersion::V0)
+            && self.0[1] == OP_PUSHBYTES_32.to_u8()
+    }
+
+    /// Checks whether a script pubkey is a P2WPKH output.
+    #[inline]
+    pub fn is_v0_p2wpkh(&self) -> bool {
+        self.0.len() == 22
+            && self.witness_version() == Some(WitnessVersion::V0)
+            && self.0[1] == OP_PUSHBYTES_20.to_u8()
+    }
+
+    /// Returns P2WPKH byte slice if this script is P2WPKH, otherwise None.
+    pub fn v0_p2wpkh(&self) -> Option<&[u8; 20]> {
+        if self.is_v0_p2wpkh() {
+            Some(self.0[2..].try_into().expect("is_v0_p2wpkh checks the length"))
+        } else {
+            None
+        }
+    }
+
+    /// Checks whether a script pubkey is a P2TR output.
+    #[inline]
+    pub fn is_v1_p2tr(&self) -> bool {
+        self.0.len() == 34
+            && self.witness_version() == Some(WitnessVersion::V1)
+            && self.0[1] == OP_PUSHBYTES_32.to_u8()
+    }
+
+    /// Check if this is an OP_RETURN output.
+    #[inline]
+    pub fn is_op_return(&self) -> bool {
+        match self.0.first() {
+            Some(b) => *b == OP_RETURN.to_u8(),
+            None => false,
+        }
+    }
+
+    /// Checks whether a script can be proven to have no satisfying input.
+    #[inline]
+    pub fn is_provably_unspendable(&self) -> bool {
+        use crate::blockdata::opcodes::Class::{IllegalOp, ReturnOp};
+
+        match self.0.first() {
+            Some(b) => {
+                let first = opcodes::All::from(*b);
+                let class = first.classify(opcodes::ClassifyContext::Legacy);
+
+                class == ReturnOp || class == IllegalOp
+            }
+            None => false,
+        }
+    }
+
+    /// Returns the minimum value an output with this script should have in order to be
+    /// broadcastable on today's Bitcoin network.
+    pub fn dust_value(&self) -> crate::Amount {
+        // This must never be lower than Bitcoin Core's GetDustThreshold() (as of v0.21) as it may
+        // otherwise allow users to create transactions which likely can never be broadcast/confirmed.
+        let sats = DUST_RELAY_TX_FEE as u64 / 1000 * // The default dust relay fee is 3000 satoshi/kB (i.e. 3 sat/vByte)
+        if self.is_op_return() {
+            0
+        } else if self.is_witness_program() {
+            32 + 4 + 1 + (107 / 4) + 4 + // The spend cost copied from Core
+            8 + // The serialized size of the TxOut's amount field
+            self.consensus_encode(&mut sink()).expect("sinks don't error") as u64 // The serialized size of this script_pubkey
+        } else {
+            32 + 4 + 1 + 107 + 4 + // The spend cost copied from Core
+            8 + // The serialized size of the TxOut's amount field
+            self.consensus_encode(&mut sink()).expect("sinks don't error") as u64 // The serialized size of this script_pubkey
+        };
+
+        crate::Amount::from_sat(sats)
+    }
+
+    /// Iterates over the script instructions.
+    ///
+    /// Each returned item is a nested enum covering opcodes, datapushes and errors.
+    /// At most one error will be returned and then the iterator will end. To instead iterate over
+    /// the script as sequence of bytes call the [`bytes`](Self::bytes) method.
+    ///
+    /// To force minimal pushes, use [`instructions_minimal`](Self::instructions_minimal).
+    #[inline]
+    pub fn instructions(&self) -> Instructions {
+        Instructions { data: self.0.iter(), enforce_minimal: false }
+    }
+
+    /// Iterates over the script instructions while enforcing minimal pushes.
+    ///
+    /// This is similar to [`instructions`](Self::instructions) but an error is returned if a push
+    /// is not minimal.
+    #[inline]
+    pub fn instructions_minimal(&self) -> Instructions {
+        Instructions { data: self.0.iter(), enforce_minimal: true }
+    }
+
+    /// Iterates over the script instructions and their indices.
+    ///
+    /// Unless the script contains an error, the returned item consists of an index pointing to the
+    /// position in the script where the instruction begins and the decoded instruction - either an
+    /// opcode or data push.
+    ///
+    /// To force minimal pushes, use [`Self::instruction_indices_minimal`].
+    #[inline]
+    pub fn instruction_indices(&self) -> InstructionIndices {
+        InstructionIndices::from_instructions(self.instructions())
+    }
+
+    /// Iterates over the script instructions and their indices while enforcing minimal pushes.
+    ///
+    /// This is similar to [`instruction_indices`](Self::instruction_indices) but an error is
+    /// returned if a push is not minimal.
+    #[inline]
+    pub fn instruction_indices_minimal(&self) -> InstructionIndices {
+        InstructionIndices::from_instructions(self.instructions_minimal())
+    }
+
+    /// Shorthand for [`Self::verify_with_flags`] with flag [bitcoinconsensus::VERIFY_ALL].
+    ///
+    /// # Parameters
+    ///  * `index` - The input index in spending which is spending this transaction.
+    ///  * `amount` - The amount this script guards.
+    ///  * `spending_tx` - The transaction that attempts to spend the output holding this script.
+    #[cfg(feature = "bitcoinconsensus")]
+    pub fn verify(
+        &self,
+        index: usize,
+        amount: crate::Amount,
+        spending_tx: &[u8],
+    ) -> Result<(), Error> {
+        self.verify_with_flags(index, amount, spending_tx, bitcoinconsensus::VERIFY_ALL)
+    }
+
+    /// Verifies spend of an input script.
+    ///
+    /// # Parameters
+    ///  * `index` - The input index in spending which is spending this transaction.
+    ///  * `amount` - The amount this script guards.
+    ///  * `spending_tx` - The transaction that attempts to spend the output holding this script.
+    ///  * `flags` - Verification flags, see [`bitcoinconsensus::VERIFY_ALL`] and similar.
+    #[cfg(feature = "bitcoinconsensus")]
+    pub fn verify_with_flags<F: Into<u32>>(
+        &self,
+        index: usize,
+        amount: crate::Amount,
+        spending_tx: &[u8],
+        flags: F,
+    ) -> Result<(), Error> {
+        Ok(bitcoinconsensus::verify_with_flags(
+            &self.0[..],
+            amount.to_sat(),
+            spending_tx,
+            index,
+            flags.into(),
+        )?)
+    }
+
+    /// Writes the assembly decoding of the script to the formatter.
+    pub fn fmt_asm(&self, f: &mut dyn fmt::Write) -> fmt::Result {
+        bytes_to_asm_fmt(self.as_ref(), f)
+    }
+
+    /// Returns the assembly decoding of the script.
+    pub fn to_asm_string(&self) -> String {
+        let mut buf = String::new();
+        self.fmt_asm(&mut buf).unwrap();
+        buf
+    }
+
+    /// Formats the script as lower-case hex.
+    ///
+    /// This is a more convenient and performant way to write `format!("{:x}", script)`.
+    /// For better performance you should generally prefer displaying the script but if `String` is
+    /// required (this is common in tests) this method is can be used.
+    pub fn to_hex_string(&self) -> String { self.as_bytes().to_lower_hex_string() }
+
+    /// Returns the first opcode of the script (if there is any).
+    pub fn first_opcode(&self) -> Option<opcodes::All> {
+        self.as_bytes().first().copied().map(From::from)
+    }
+
+    /// Iterates the script to find the last opcode.
+    ///
+    /// Returns `None` is the instruction is data push or if the script is empty.
+    pub fn last_opcode(&self) -> Option<opcodes::All> {
+        match self.instructions().last() {
+            Some(Ok(Instruction::Op(op))) => Some(op),
+            _ => None,
+        }
+    }
+
+    /// Converts a [`Box<Script>`](Box) into a [`ScriptBuf`] without copying or allocating.
+    #[must_use = "`self` will be dropped if the result is not used"]
+    pub fn into_script_buf(self: Box<Self>) -> ScriptBuf {
+        let rw = Box::into_raw(self) as *mut [u8];
+        // SAFETY: copied from `std`
+        // The pointer was just created from a box without deallocating
+        // Casting a transparent struct wrapping a slice to the slice pointer is sound (same
+        // layout).
+        let inner = unsafe { Box::from_raw(rw) };
+        ScriptBuf(Vec::from(inner))
+    }
+}
+
+/// Iterator over bytes of a script
+pub struct Bytes<'a>(core::iter::Copied<core::slice::Iter<'a, u8>>);
+
+impl Iterator for Bytes<'_> {
+    type Item = u8;
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> { self.0.next() }
+
+    #[inline]
+    fn size_hint(&self) -> (usize, Option<usize>) { self.0.size_hint() }
+
+    #[inline]
+    fn nth(&mut self, n: usize) -> Option<Self::Item> { self.0.nth(n) }
+}
+
+impl DoubleEndedIterator for Bytes<'_> {
+    #[inline]
+    fn next_back(&mut self) -> Option<Self::Item> { self.0.next_back() }
+
+    #[inline]
+    fn nth_back(&mut self, n: usize) -> Option<Self::Item> { self.0.nth_back(n) }
+}
+
+impl ExactSizeIterator for Bytes<'_> {}
+impl core::iter::FusedIterator for Bytes<'_> {}
+
+macro_rules! delegate_index {
+    ($($type:ty),* $(,)?) => {
+        $(
+            /// Script subslicing operation - read [slicing safety](#slicing-safety)!
+            impl Index<$type> for Script {
+                type Output = Self;
+
+                #[inline]
+                fn index(&self, index: $type) -> &Self::Output {
+                    Self::from_bytes(&self.0[index])
+                }
+            }
+        )*
+    }
+}
+
+delegate_index!(
+    Range<usize>,
+    RangeFrom<usize>,
+    RangeTo<usize>,
+    RangeFull,
+    RangeInclusive<usize>,
+    RangeToInclusive<usize>
+);
+#[cfg(rust_v_1_53)]
+delegate_index!((Bound<usize>, Bound<usize>));
diff --git a/dash/src/blockdata/script/builder.rs b/dash/src/blockdata/script/builder.rs
new file mode 100644
index 000000000..df76ccc60
--- /dev/null
+++ b/dash/src/blockdata/script/builder.rs
@@ -0,0 +1,145 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+#[cfg(feature = "bitcoinconsensus")]
+use core::convert::From;
+use core::default::Default;
+use core::fmt;
+
+use secp256k1::XOnlyPublicKey;
+
+use crate::blockdata::locktime::absolute;
+use crate::blockdata::opcodes::all::*;
+use crate::blockdata::opcodes::{self};
+use crate::blockdata::script::{opcode_to_verify, write_scriptint, PushBytes, Script, ScriptBuf};
+use crate::key::PublicKey;
+use crate::prelude::*;
+
+/// An Object which can be used to construct a script piece by piece.
+#[derive(PartialEq, Eq, Clone)]
+pub struct Builder(ScriptBuf, Option<opcodes::All>);
+
+impl Builder {
+    /// Creates a new empty script.
+    pub fn new() -> Self { Builder(ScriptBuf::new(), None) }
+
+    /// Returns the length in bytes of the script.
+    pub fn len(&self) -> usize { self.0.len() }
+
+    /// Checks whether the script is the empty script.
+    pub fn is_empty(&self) -> bool { self.0.is_empty() }
+
+    /// Adds instructions to push an integer onto the stack.
+    ///
+    /// Integers are encoded as little-endian signed-magnitude numbers, but there are dedicated
+    /// opcodes to push some small integers.
+    pub fn push_int(self, data: i64) -> Builder {
+        // We can special-case -1, 1-16
+        if data == -1 || (1..=16).contains(&data) {
+            let opcode = opcodes::All::from((data - 1 + opcodes::OP_TRUE.to_u8() as i64) as u8);
+            self.push_opcode(opcode)
+        }
+        // We can also special-case zero
+        else if data == 0 {
+            self.push_opcode(opcodes::OP_0)
+        }
+        // Otherwise encode it as data
+        else {
+            self.push_int_non_minimal(data)
+        }
+    }
+
+    /// Adds instructions to push an integer onto the stack without optimization.
+    ///
+    /// This uses the explicit encoding regardless of the availability of dedicated opcodes.
+    pub fn push_int_non_minimal(self, data: i64) -> Builder {
+        let mut buf = [0u8; 8];
+        let len = write_scriptint(&mut buf, data);
+        self.push_slice(&<&PushBytes>::from(&buf)[..len])
+    }
+
+    /// Adds instructions to push some arbitrary data onto the stack.
+    pub fn push_slice<T: AsRef<PushBytes>>(mut self, data: T) -> Builder {
+        self.0.push_slice(data);
+        self.1 = None;
+        self
+    }
+
+    /// Adds instructions to push a public key onto the stack.
+    pub fn push_key(self, key: &PublicKey) -> Builder {
+        if key.compressed {
+            self.push_slice(key.inner.serialize())
+        } else {
+            self.push_slice(key.inner.serialize_uncompressed())
+        }
+    }
+
+    /// Adds instructions to push an XOnly public key onto the stack.
+    pub fn push_x_only_key(self, x_only_key: &XOnlyPublicKey) -> Builder {
+        self.push_slice(x_only_key.serialize())
+    }
+
+    /// Adds a single opcode to the script.
+    pub fn push_opcode(mut self, data: opcodes::All) -> Builder {
+        self.0.push_opcode(data);
+        self.1 = Some(data);
+        self
+    }
+
+    /// Adds an `OP_VERIFY` to the script or replaces the last opcode with VERIFY form.
+    ///
+    /// Some opcodes such as `OP_CHECKSIG` have a verify variant that works as if `VERIFY` was
+    /// in the script right after. To save space this function appends `VERIFY` only if
+    /// the most-recently-added opcode *does not* have an alternate `VERIFY` form. If it does
+    /// the last opcode is replaced. E.g., `OP_CHECKSIG` will become `OP_CHECKSIGVERIFY`.
+    ///
+    /// Note that existing `OP_*VERIFY` opcodes do not lead to the instruction being ignored
+    /// because `OP_VERIFY` consumes an item from the stack so ignoring them would change the
+    /// semantics.
+    pub fn push_verify(mut self) -> Builder {
+        // "duplicated code" because we need to update `1` field
+        match opcode_to_verify(self.1) {
+            Some(opcode) => {
+                (self.0).0.pop();
+                self.push_opcode(opcode)
+            }
+            None => self.push_opcode(OP_VERIFY),
+        }
+    }
+
+    /// Adds instructions to push an absolute lock time onto the stack.
+    pub fn push_lock_time(self, lock_time: absolute::LockTime) -> Builder {
+        self.push_int(lock_time.to_consensus_u32().into())
+    }
+
+    /// Converts the `Builder` into `ScriptBuf`.
+    pub fn into_script(self) -> ScriptBuf { self.0 }
+
+    /// Converts the `Builder` into script bytes
+    pub fn into_bytes(self) -> Vec<u8> { self.0.into() }
+
+    /// Returns the internal script
+    pub fn as_script(&self) -> &Script { &self.0 }
+
+    /// Returns script bytes
+    pub fn as_bytes(&self) -> &[u8] { self.0.as_bytes() }
+}
+
+impl Default for Builder {
+    fn default() -> Builder { Builder::new() }
+}
+
+/// Creates a new builder from an existing vector.
+impl From<Vec<u8>> for Builder {
+    fn from(v: Vec<u8>) -> Builder {
+        let script = ScriptBuf::from(v);
+        let last_op = script.last_opcode();
+        Builder(script, last_op)
+    }
+}
+
+impl fmt::Display for Builder {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { self.0.fmt_asm(f) }
+}
+
+internals::debug_from_display!(Builder);
diff --git a/dash/src/blockdata/script/instruction.rs b/dash/src/blockdata/script/instruction.rs
new file mode 100644
index 000000000..6dd30da94
--- /dev/null
+++ b/dash/src/blockdata/script/instruction.rs
@@ -0,0 +1,239 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+use core::convert::TryInto;
+
+use crate::blockdata::opcodes;
+use crate::blockdata::script::{read_uint_iter, Error, PushBytes, Script, ScriptBuf, UintError};
+
+/// A "parsed opcode" which allows iterating over a [`Script`] in a more sensible way.
+#[derive(Debug, PartialEq, Eq, Copy, Clone)]
+pub enum Instruction<'a> {
+    /// Push a bunch of data.
+    PushBytes(&'a PushBytes),
+    /// Some non-push opcode.
+    Op(opcodes::All),
+}
+
+impl<'a> Instruction<'a> {
+    /// Returns the opcode if the instruction is not a data push.
+    pub fn opcode(&self) -> Option<opcodes::All> {
+        match self {
+            Instruction::Op(op) => Some(*op),
+            Instruction::PushBytes(_) => None,
+        }
+    }
+
+    /// Returns the pushed bytes if the instruction is a data push.
+    pub fn push_bytes(&self) -> Option<&PushBytes> {
+        match self {
+            Instruction::Op(_) => None,
+            Instruction::PushBytes(bytes) => Some(bytes),
+        }
+    }
+
+    /// Returns the number of bytes required to encode the instruction in script.
+    pub fn script_serialized_len(&self) -> usize {
+        match self {
+            Instruction::Op(_) => 1,
+            Instruction::PushBytes(bytes) => ScriptBuf::reserved_len_for_slice(bytes.len()),
+        }
+    }
+}
+
+/// Iterator over a script returning parsed opcodes.
+#[derive(Debug, Clone)]
+pub struct Instructions<'a> {
+    /// The instruction script in the byte array.
+    pub data: core::slice::Iter<'a, u8>,
+    /// Whether to enforce minimal pushdata encoding.
+    pub enforce_minimal: bool,
+}
+
+impl<'a> Instructions<'a> {
+    /// Views the remaining script as a slice.
+    ///
+    /// This is analogous to what [`core::str::Chars::as_str`] does.
+    pub fn as_script(&self) -> &'a Script { Script::from_bytes(self.data.as_slice()) }
+
+    /// Sets the iterator to end so that it won't iterate any longer.
+    pub fn kill(&mut self) {
+        let len = self.data.len();
+        self.data.nth(len.max(1) - 1);
+    }
+
+    /// Takes a `len` bytes long slice from iterator and returns it, advancing the iterator.
+    ///
+    /// If the iterator is not long enough [`Error::EarlyEndOfScript`] is returned and the iterator
+    /// is killed to avoid returning an infinite stream of errors.
+    pub fn take_slice_or_kill(&mut self, len: u32) -> Result<&'a PushBytes, Error> {
+        let len = len as usize;
+        if self.data.len() >= len {
+            let slice = &self.data.as_slice()[..len];
+            if len > 0 {
+                self.data.nth(len - 1);
+            }
+
+            Ok(slice.try_into().expect("len was created from u32, so can't happen"))
+        } else {
+            self.kill();
+            Err(Error::EarlyEndOfScript)
+        }
+    }
+
+    /// Returns the next instruction without advancing the iterator.
+    pub fn next_push_data_len(
+        &mut self,
+        len: PushDataLenLen,
+        min_push_len: usize,
+    ) -> Option<Result<Instruction<'a>, Error>> {
+        let n = match read_uint_iter(&mut self.data, len as usize) {
+            Ok(n) => n,
+            // We do exhaustive matching to not forget to handle new variants if we extend
+            // `UintError` type.
+            // Overflow actually means early end of script (script is definitely shorter
+            // than `usize::max_value()`)
+            Err(UintError::EarlyEndOfScript) | Err(UintError::NumericOverflow) => {
+                self.kill();
+                return Some(Err(Error::EarlyEndOfScript));
+            }
+        };
+        if self.enforce_minimal && n < min_push_len {
+            self.kill();
+            return Some(Err(Error::NonMinimalPush));
+        }
+        let result = n
+            .try_into()
+            .map_err(|_| Error::NumericOverflow)
+            .and_then(|n| self.take_slice_or_kill(n))
+            .map(Instruction::PushBytes);
+        Some(result)
+    }
+}
+
+/// Allowed length of push data length.
+///
+/// This makes it easier to prove correctness of `next_push_data_len`.
+pub enum PushDataLenLen {
+    /// ...
+    One = 1,
+    /// ...
+    Two = 2,
+    /// ...
+    Four = 4,
+}
+
+impl<'a> Iterator for Instructions<'a> {
+    type Item = Result<Instruction<'a>, Error>;
+
+    fn next(&mut self) -> Option<Result<Instruction<'a>, Error>> {
+        let &byte = self.data.next()?;
+
+        // classify parameter does not really matter here since we are only using
+        // it for pushes and nums
+        match opcodes::All::from(byte).classify(opcodes::ClassifyContext::Legacy) {
+            opcodes::Class::PushBytes(n) => {
+                // make sure safety argument holds across refactorings
+                let n: u32 = n;
+
+                let op_byte = self.data.as_slice().first();
+                match (self.enforce_minimal, op_byte, n) {
+                    (true, Some(&op_byte), 1)
+                        if op_byte == 0x81 || (op_byte > 0 && op_byte <= 16) =>
+                    {
+                        self.kill();
+                        Some(Err(Error::NonMinimalPush))
+                    }
+                    (_, None, 0) => {
+                        // the iterator is already empty, may as well use this information to avoid
+                        // whole take_slice_or_kill function
+                        Some(Ok(Instruction::PushBytes(PushBytes::empty())))
+                    }
+                    _ => Some(self.take_slice_or_kill(n).map(Instruction::PushBytes)),
+                }
+            }
+            opcodes::Class::Ordinary(opcodes::Ordinary::OP_PUSHDATA1) =>
+                self.next_push_data_len(PushDataLenLen::One, 76),
+            opcodes::Class::Ordinary(opcodes::Ordinary::OP_PUSHDATA2) =>
+                self.next_push_data_len(PushDataLenLen::Two, 0x100),
+            opcodes::Class::Ordinary(opcodes::Ordinary::OP_PUSHDATA4) =>
+                self.next_push_data_len(PushDataLenLen::Four, 0x10000),
+            // Everything else we can push right through
+            _ => Some(Ok(Instruction::Op(opcodes::All::from(byte)))),
+        }
+    }
+
+    #[inline]
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        if self.data.len() == 0 {
+            (0, Some(0))
+        } else {
+            // There will not be more instructions than bytes
+            (1, Some(self.data.len()))
+        }
+    }
+}
+
+impl<'a> core::iter::FusedIterator for Instructions<'a> {}
+
+/// Iterator over script instructions with their positions.
+///
+/// The returned indices can be used for slicing [`Script`] [safely](Script#slicing-safety).
+///
+/// This is analogous to [`core::str::CharIndices`].
+#[derive(Debug, Clone)]
+pub struct InstructionIndices<'a> {
+    instructions: Instructions<'a>,
+    pos: usize,
+}
+
+impl<'a> InstructionIndices<'a> {
+    /// Views the remaining script as a slice.
+    ///
+    /// This is analogous to what [`core::str::Chars::as_str`] does.
+    #[inline]
+    pub fn as_script(&self) -> &'a Script { self.instructions.as_script() }
+
+    /// Creates `Self` setting `pos` to 0.
+    pub fn from_instructions(instructions: Instructions<'a>) -> Self {
+        InstructionIndices { instructions, pos: 0 }
+    }
+
+    /// Returns the number of remaining bytes.
+    pub fn remaining_bytes(&self) -> usize { self.instructions.as_script().len() }
+
+    /// Modifies the iterator using `next_fn` returning the next item.
+    ///
+    /// This generically computes the new position and maps the value to be returned from iterator
+    /// method.
+    pub fn next_with<F: FnOnce(&mut Self) -> Option<Result<Instruction<'a>, Error>>>(
+        &mut self,
+        next_fn: F,
+    ) -> Option<<Self as Iterator>::Item> {
+        let prev_remaining = self.remaining_bytes();
+        let prev_pos = self.pos;
+        let instruction = next_fn(self)?;
+        // No underflow: there must be less remaining bytes now than previously
+        let consumed = prev_remaining - self.remaining_bytes();
+        // No overflow: sum will never exceed slice length which itself can't exceed `usize`
+        self.pos += consumed;
+        Some(instruction.map(move |instruction| (prev_pos, instruction)))
+    }
+}
+
+impl<'a> Iterator for InstructionIndices<'a> {
+    /// The `usize` in the tuple represents index at which the returned `Instruction` is located.
+    type Item = Result<(usize, Instruction<'a>), Error>;
+
+    fn next(&mut self) -> Option<Self::Item> { self.next_with(|this| this.instructions.next()) }
+
+    #[inline]
+    fn size_hint(&self) -> (usize, Option<usize>) { self.instructions.size_hint() }
+
+    // the override avoids computing pos multiple times
+    fn nth(&mut self, n: usize) -> Option<Self::Item> {
+        self.next_with(|this| this.instructions.nth(n))
+    }
+}
+
+impl core::iter::FusedIterator for InstructionIndices<'_> {}
diff --git a/dash/src/blockdata/script/mod.rs b/dash/src/blockdata/script/mod.rs
new file mode 100644
index 000000000..f05bb24ce
--- /dev/null
+++ b/dash/src/blockdata/script/mod.rs
@@ -0,0 +1,786 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+//! Bitcoin scripts.
+//!
+//! *[See also the `Script` type](Script).*
+//!
+//! This module provides the structures and functions needed to support scripts.
+//!
+//! <details>
+//! <summary>What is Bitcoin script</summary>
+//!
+//! Scripts define Bitcoin's digital signature scheme: a signature is formed
+//! from a script (the second half of which is defined by a coin to be spent,
+//! and the first half provided by the spending transaction), and is valid iff
+//! the script leaves `TRUE` on the stack after being evaluated. Bitcoin's
+//! script is a stack-based assembly language similar in spirit to [Forth].
+//!
+//! Script is represented as a sequence of bytes on the wire, each byte representing an operation,
+//! or data to be pushed on the stack.
+//!
+//! See [Bitcoin Wiki: Script][wiki-script] for more information.
+//!
+//! [Forth]: https://en.wikipedia.org/wiki/Forth_(programming_language)
+//!
+//! [wiki-script]: https://en.bitcoin.it/wiki/Script
+//! </details>
+//!
+//! In this library we chose to keep the byte representation in memory and decode opcodes only when
+//! processing the script. This is similar to Rust choosing to represent strings as UTF-8-encoded
+//! bytes rather than slice of `char`s. In both cases the individual items can have different sizes
+//! and forcing them to be larger would waste memory and, in case of Bitcoin script, even some
+//! performance (forcing allocations).
+//!
+//! ## `Script` vs `ScriptBuf` vs `Builder`
+//!
+//! These are the most important types in this module and they are quite similar, so it may seem
+//! confusing what the differences are. `Script` is an unsized type much like `str` or `Path` are
+//! and `ScriptBuf` is an owned counterpart to `Script` just like `String` is an owned counterpart
+//! to `str`.
+//!
+//! However it is common to construct an owned script and then pass it around. For this case a
+//! builder API is more convenient. To support this we provide `Builder` type which is very similar
+//! to `ScriptBuf` but its methods take `self` instead of `&mut self` and return `Self`. It also
+//! contains a cache that may make some modifications faster. This cache is usually not needed
+//! outside of creating the script.
+//!
+//! At the time of writing there's only one operation using the cache - `push_verify`, so the cache
+//! is minimal but we may extend it in the future if needed.
+
+use alloc::rc::Rc;
+#[cfg(any(not(rust_v_1_60), target_has_atomic = "ptr"))]
+use alloc::sync::Arc;
+use core::borrow::{Borrow, BorrowMut};
+use core::cmp::Ordering;
+use core::fmt;
+use core::ops::{Deref, DerefMut};
+
+#[cfg(feature = "serde")]
+use serde;
+
+use crate::blockdata::opcodes::all::*;
+use crate::blockdata::opcodes::{self};
+use crate::consensus::{encode, Decodable, Encodable};
+use crate::hash_types::{ScriptHash, WScriptHash};
+use crate::prelude::*;
+use crate::{io, OutPoint};
+
+mod borrowed;
+mod builder;
+mod instruction;
+mod owned;
+mod push_bytes;
+#[cfg(test)]
+mod tests;
+
+pub use self::borrowed::*;
+pub use self::builder::*;
+pub use self::instruction::*;
+pub use self::owned::*;
+pub use self::push_bytes::*;
+
+/// Encodes an integer in script(minimal CScriptNum) format.
+///
+/// Writes bytes into the buffer and returns the number of bytes written.
+///
+/// Note that `write_scriptint`/`read_scriptint` do not roundtrip if the value written requires
+/// more than 4 bytes, this is in line with Bitcoin Core (see [`CScriptNum::serialize`]).
+///
+/// [`CScriptNum::serialize`]: <https://github.com/bitcoin/bitcoin/blob/8ae2808a4354e8dcc697f76bacc5e2f2befe9220/src/script/script.h#L345>
+pub fn write_scriptint(out: &mut [u8; 8], n: i64) -> usize {
+    let mut len = 0;
+    if n == 0 {
+        return len;
+    }
+
+    let neg = n < 0;
+
+    let mut abs = if neg { -n } else { n } as usize;
+    while abs > 0xFF {
+        out[len] = (abs & 0xFF) as u8;
+        len += 1;
+        abs >>= 8;
+    }
+    // If the number's value causes the sign bit to be set, we need an extra
+    // byte to get the correct value and correct sign bit
+    if abs & 0x80 != 0 {
+        out[len] = abs as u8;
+        len += 1;
+        out[len] = if neg { 0x80u8 } else { 0u8 };
+        len += 1;
+    }
+    // Otherwise we just set the sign bit ourselves
+    else {
+        abs |= if neg { 0x80 } else { 0 };
+        out[len] = abs as u8;
+        len += 1;
+    }
+    len
+}
+
+/// Decodes an integer in script(minimal CScriptNum) format.
+///
+/// Notice that this fails on overflow: the result is the same as in
+/// bitcoind, that only 4-byte signed-magnitude values may be read as
+/// numbers. They can be added or subtracted (and a long time ago,
+/// multiplied and divided), and this may result in numbers which
+/// can't be written out in 4 bytes or less. This is ok! The number
+/// just can't be read as a number again.
+/// This is a bit crazy and subtle, but it makes sense: you can load
+/// 32-bit numbers and do anything with them, which back when mult/div
+/// was allowed, could result in up to a 64-bit number. We don't want
+/// overflow since that's surprising --- and we don't want numbers that
+/// don't fit in 64 bits (for efficiency on modern processors) so we
+/// simply say, anything in excess of 32 bits is no longer a number.
+/// This is basically a ranged type implementation.
+///
+/// This code is based on the `CScriptNum` constructor in Bitcoin Core (see `script.h`).
+pub fn read_scriptint(v: &[u8]) -> Result<i64, Error> {
+    let len = v.len();
+    if len > 4 {
+        return Err(Error::NumericOverflow);
+    }
+    let last = match v.last() {
+        Some(last) => last,
+        None => return Ok(0),
+    };
+    // Comment and code copied from Bitcoin Core:
+    // https://github.com/bitcoin/bitcoin/blob/447f50e4aed9a8b1d80e1891cda85801aeb80b4e/src/script/script.h#L247-L262
+    // If the most-significant-byte - excluding the sign bit - is zero
+    // then we're not minimal. Note how this test also rejects the
+    // negative-zero encoding, 0x80.
+    if (last & 0x7f) == 0 {
+        // One exception: if there's more than one byte and the most
+        // significant bit of the second-most-significant-byte is set
+        // it would conflict with the sign bit. An example of this case
+        // is +-255, which encode to 0xff00 and 0xff80 respectively.
+        // (big-endian).
+        if v.len() <= 1 || (v[v.len() - 2] & 0x80) == 0 {
+            return Err(Error::NonMinimalPush);
+        }
+    }
+
+    let (mut ret, sh) = v.iter().fold((0, 0), |(acc, sh), n| (acc + ((*n as i64) << sh), sh + 8));
+    if v[len - 1] & 0x80 != 0 {
+        ret &= (1 << (sh - 1)) - 1;
+        ret = -ret;
+    }
+    Ok(ret)
+}
+
+/// Decodes a boolean.
+///
+/// This is like "`read_scriptint` then map 0 to false and everything
+/// else as true", except that the overflow rules don't apply.
+#[inline]
+pub fn read_scriptbool(v: &[u8]) -> bool {
+    match v.split_last() {
+        Some((last, rest)) => !((last & !0x80 == 0x00) && rest.iter().all(|&b| b == 0)),
+        None => false,
+    }
+}
+
+/// Decodes a script-encoded unsigned integer.
+///
+/// ## Errors
+///
+/// This function returns an error in these cases:
+///
+/// * `data` is shorter than `size` => `EarlyEndOfScript`
+/// * `size` is greater than `u16::max_value / 8` (8191) => `NumericOverflow`
+/// * The number being read overflows `usize` => `NumericOverflow`
+///
+/// Note that this does **not** return an error for `size` between `core::size_of::<usize>()`
+/// and `u16::max_value / 8` if there's no overflow.
+#[inline]
+#[deprecated(since = "0.30.0", note = "dash integers are signed 32 bits, use read_scriptint")]
+pub fn read_uint(data: &[u8], size: usize) -> Result<usize, Error> {
+    read_uint_iter(&mut data.iter(), size).map_err(Into::into)
+}
+
+// We internally use implementation based on iterator so that it automatically advances as needed
+// Errors are same as above, just different type.
+fn read_uint_iter(data: &mut core::slice::Iter<'_, u8>, size: usize) -> Result<usize, UintError> {
+    if data.len() < size {
+        Err(UintError::EarlyEndOfScript)
+    } else if size > usize::from(u16::max_value() / 8) {
+        // Casting to u32 would overflow
+        Err(UintError::NumericOverflow)
+    } else {
+        let mut ret = 0;
+        for (i, item) in data.take(size).enumerate() {
+            ret = usize::from(*item)
+                // Casting is safe because we checked above to not repeat the same check in a loop
+                .checked_shl((i * 8) as u32)
+                .ok_or(UintError::NumericOverflow)?
+                .checked_add(ret)
+                .ok_or(UintError::NumericOverflow)?;
+        }
+        Ok(ret)
+    }
+}
+
+fn opcode_to_verify(opcode: Option<opcodes::All>) -> Option<opcodes::All> {
+    opcode.and_then(|opcode| match opcode {
+        OP_EQUAL => Some(OP_EQUALVERIFY),
+        OP_NUMEQUAL => Some(OP_NUMEQUALVERIFY),
+        OP_CHECKSIG => Some(OP_CHECKSIGVERIFY),
+        OP_CHECKMULTISIG => Some(OP_CHECKMULTISIGVERIFY),
+        _ => None,
+    })
+}
+
+// We keep all the `Script` and `ScriptBuf` impls together since its easier to see side-by-side.
+
+impl From<ScriptBuf> for Box<Script> {
+    fn from(v: ScriptBuf) -> Self { v.into_boxed_script() }
+}
+
+impl From<ScriptBuf> for Cow<'_, Script> {
+    fn from(value: ScriptBuf) -> Self { Cow::Owned(value) }
+}
+
+impl<'a> From<Cow<'a, Script>> for ScriptBuf {
+    fn from(value: Cow<'a, Script>) -> Self {
+        match value {
+            Cow::Owned(owned) => owned,
+            Cow::Borrowed(borrwed) => borrwed.into(),
+        }
+    }
+}
+
+impl<'a> From<Cow<'a, Script>> for Box<Script> {
+    fn from(value: Cow<'a, Script>) -> Self {
+        match value {
+            Cow::Owned(owned) => owned.into(),
+            Cow::Borrowed(borrwed) => borrwed.into(),
+        }
+    }
+}
+
+impl<'a> From<&'a Script> for Box<Script> {
+    fn from(value: &'a Script) -> Self { value.to_owned().into() }
+}
+
+impl<'a> From<&'a Script> for ScriptBuf {
+    fn from(value: &'a Script) -> Self { value.to_owned() }
+}
+
+impl<'a> From<&'a Script> for Cow<'a, Script> {
+    fn from(value: &'a Script) -> Self { Cow::Borrowed(value) }
+}
+
+/// Note: This will fail to compile on old Rust for targets that don't support atomics
+#[cfg(any(not(rust_v_1_60), target_has_atomic = "ptr"))]
+impl<'a> From<&'a Script> for Arc<Script> {
+    fn from(value: &'a Script) -> Self {
+        let rw: *const [u8] = Arc::into_raw(Arc::from(&value.0));
+        // SAFETY: copied from `std`
+        // The pointer was just created from an Arc without deallocating
+        // Casting a slice to a transparent struct wrapping that slice is sound (same
+        // layout).
+        unsafe { Arc::from_raw(rw as *const Script) }
+    }
+}
+
+impl<'a> From<&'a Script> for Rc<Script> {
+    fn from(value: &'a Script) -> Self {
+        let rw: *const [u8] = Rc::into_raw(Rc::from(&value.0));
+        // SAFETY: copied from `std`
+        // The pointer was just created from an Rc without deallocating
+        // Casting a slice to a transparent struct wrapping that slice is sound (same
+        // layout).
+        unsafe { Rc::from_raw(rw as *const Script) }
+    }
+}
+
+impl From<Vec<u8>> for ScriptBuf {
+    fn from(v: Vec<u8>) -> Self { ScriptBuf(v) }
+}
+
+impl From<ScriptBuf> for Vec<u8> {
+    fn from(v: ScriptBuf) -> Self { v.0 }
+}
+
+impl From<ScriptBuf> for ScriptHash {
+    fn from(script: ScriptBuf) -> ScriptHash { script.script_hash() }
+}
+
+impl From<&ScriptBuf> for ScriptHash {
+    fn from(script: &ScriptBuf) -> ScriptHash { script.script_hash() }
+}
+
+impl From<&Script> for ScriptHash {
+    fn from(script: &Script) -> ScriptHash { script.script_hash() }
+}
+
+impl From<ScriptBuf> for WScriptHash {
+    fn from(script: ScriptBuf) -> WScriptHash { script.wscript_hash() }
+}
+
+impl From<&ScriptBuf> for WScriptHash {
+    fn from(script: &ScriptBuf) -> WScriptHash { script.wscript_hash() }
+}
+
+impl From<&Script> for WScriptHash {
+    fn from(script: &Script) -> WScriptHash { script.wscript_hash() }
+}
+
+impl AsRef<Script> for Script {
+    #[inline]
+    fn as_ref(&self) -> &Script { self }
+}
+
+impl AsRef<Script> for ScriptBuf {
+    fn as_ref(&self) -> &Script { self }
+}
+
+impl AsRef<[u8]> for Script {
+    #[inline]
+    fn as_ref(&self) -> &[u8] { self.as_bytes() }
+}
+
+impl AsRef<[u8]> for ScriptBuf {
+    fn as_ref(&self) -> &[u8] { self.as_bytes() }
+}
+
+impl AsMut<Script> for Script {
+    fn as_mut(&mut self) -> &mut Script { self }
+}
+
+impl AsMut<Script> for ScriptBuf {
+    fn as_mut(&mut self) -> &mut Script { self }
+}
+
+impl AsMut<[u8]> for Script {
+    #[inline]
+    fn as_mut(&mut self) -> &mut [u8] { self.as_mut_bytes() }
+}
+
+impl AsMut<[u8]> for ScriptBuf {
+    fn as_mut(&mut self) -> &mut [u8] { self.as_mut_bytes() }
+}
+
+impl fmt::Debug for Script {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.write_str("Script(")?;
+        self.fmt_asm(f)?;
+        f.write_str(")")
+    }
+}
+
+impl fmt::Debug for ScriptBuf {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Debug::fmt(self.as_script(), f) }
+}
+
+impl fmt::Display for Script {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { self.fmt_asm(f) }
+}
+
+impl fmt::Display for ScriptBuf {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(self.as_script(), f) }
+}
+
+impl fmt::LowerHex for Script {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::LowerHex::fmt(&self.as_bytes().as_hex(), f)
+    }
+}
+
+impl fmt::LowerHex for ScriptBuf {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::LowerHex::fmt(self.as_script(), f) }
+}
+
+impl fmt::UpperHex for Script {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::UpperHex::fmt(&self.as_bytes().as_hex(), f)
+    }
+}
+
+impl fmt::UpperHex for ScriptBuf {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::UpperHex::fmt(self.as_script(), f) }
+}
+
+impl Deref for ScriptBuf {
+    type Target = Script;
+
+    fn deref(&self) -> &Self::Target { Script::from_bytes(&self.0) }
+}
+
+impl DerefMut for ScriptBuf {
+    fn deref_mut(&mut self) -> &mut Self::Target { Script::from_bytes_mut(&mut self.0) }
+}
+
+impl Borrow<Script> for ScriptBuf {
+    fn borrow(&self) -> &Script { self }
+}
+
+impl BorrowMut<Script> for ScriptBuf {
+    fn borrow_mut(&mut self) -> &mut Script { self }
+}
+
+impl PartialEq<ScriptBuf> for Script {
+    fn eq(&self, other: &ScriptBuf) -> bool { self.eq(other.as_script()) }
+}
+
+impl PartialEq<Script> for ScriptBuf {
+    fn eq(&self, other: &Script) -> bool { self.as_script().eq(other) }
+}
+
+impl PartialOrd<Script> for ScriptBuf {
+    fn partial_cmp(&self, other: &Script) -> Option<Ordering> {
+        self.as_script().partial_cmp(other)
+    }
+}
+
+impl PartialOrd<ScriptBuf> for Script {
+    fn partial_cmp(&self, other: &ScriptBuf) -> Option<Ordering> {
+        self.partial_cmp(other.as_script())
+    }
+}
+
+#[cfg(feature = "serde")]
+impl serde::Serialize for Script {
+    /// User-facing serialization for `Script`.
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        if serializer.is_human_readable() {
+            serializer.collect_str(&format_args!("{:x}", self))
+        } else {
+            serializer.serialize_bytes(self.as_bytes())
+        }
+    }
+}
+
+/// Can only deserialize borrowed bytes.
+#[cfg(feature = "serde")]
+impl<'de> serde::Deserialize<'de> for &'de Script {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        if deserializer.is_human_readable() {
+            use crate::serde::de::Error;
+
+            return Err(D::Error::custom(
+                "deserialization of `&Script` from human-readable formats is not possible",
+            ));
+        }
+
+        struct Visitor;
+        impl<'de> serde::de::Visitor<'de> for Visitor {
+            type Value = &'de Script;
+
+            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                formatter.write_str("borrowed bytes")
+            }
+
+            fn visit_borrowed_bytes<E>(self, v: &'de [u8]) -> Result<Self::Value, E>
+            where
+                E: serde::de::Error,
+            {
+                Ok(Script::from_bytes(v))
+            }
+        }
+        deserializer.deserialize_bytes(Visitor)
+    }
+}
+
+#[cfg(feature = "serde")]
+impl serde::Serialize for ScriptBuf {
+    /// User-facing serialization for `Script`.
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        (**self).serialize(serializer)
+    }
+}
+
+#[cfg(feature = "serde")]
+impl<'de> serde::Deserialize<'de> for ScriptBuf {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        use core::fmt::Formatter;
+
+        use hashes::hex::FromHex;
+
+        if deserializer.is_human_readable() {
+            struct Visitor;
+            impl<'de> serde::de::Visitor<'de> for Visitor {
+                type Value = ScriptBuf;
+
+                fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
+                    formatter.write_str("a script hex")
+                }
+
+                fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+                where
+                    E: serde::de::Error,
+                {
+                    let v = Vec::from_hex(v).map_err(E::custom)?;
+                    Ok(ScriptBuf::from(v))
+                }
+            }
+            deserializer.deserialize_str(Visitor)
+        } else {
+            struct BytesVisitor;
+
+            impl<'de> serde::de::Visitor<'de> for BytesVisitor {
+                type Value = ScriptBuf;
+
+                fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
+                    formatter.write_str("a script Vec<u8>")
+                }
+
+                fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
+                where
+                    E: serde::de::Error,
+                {
+                    Ok(ScriptBuf::from(v.to_vec()))
+                }
+
+                fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E>
+                where
+                    E: serde::de::Error,
+                {
+                    Ok(ScriptBuf::from(v))
+                }
+            }
+            deserializer.deserialize_byte_buf(BytesVisitor)
+        }
+    }
+}
+
+impl Encodable for Script {
+    #[inline]
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        crate::consensus::encode::consensus_encode_with_size(&self.0, w)
+    }
+}
+
+impl Encodable for ScriptBuf {
+    #[inline]
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        self.0.consensus_encode(w)
+    }
+}
+
+impl Decodable for ScriptBuf {
+    #[inline]
+    fn consensus_decode_from_finite_reader<R: io::Read + ?Sized>(
+        r: &mut R,
+    ) -> Result<Self, encode::Error> {
+        Ok(ScriptBuf(Decodable::consensus_decode_from_finite_reader(r)?))
+    }
+}
+
+/// Writes the assembly decoding of the script bytes to the formatter.
+pub fn bytes_to_asm_fmt(script: &[u8], f: &mut dyn fmt::Write) -> fmt::Result {
+    // This has to be a macro because it needs to break the loop
+    macro_rules! read_push_data_len {
+        ($iter:expr, $len:literal, $formatter:expr) => {
+            match read_uint_iter($iter, $len) {
+                Ok(n) => {
+                    n
+                },
+                Err(UintError::EarlyEndOfScript) => {
+                    $formatter.write_str("<unexpected end>")?;
+                    break;
+                }
+                // We got the data in a slice which implies it being shorter than `usize::max_value()`
+                // So if we got overflow, we can confidently say the number is higher than length of
+                // the slice even though we don't know the exact number. This implies attempt to push
+                // past end.
+                Err(UintError::NumericOverflow) => {
+                    $formatter.write_str("<push past end>")?;
+                    break;
+                }
+            }
+        }
+    }
+
+    let mut iter = script.iter();
+    // Was at least one opcode emitted?
+    let mut at_least_one = false;
+    // `iter` needs to be borrowed in `read_push_data_len`, so we have to use `while let` instead
+    // of `for`.
+    while let Some(byte) = iter.next() {
+        let opcode = opcodes::All::from(*byte);
+
+        let data_len = if let opcodes::Class::PushBytes(n) =
+            opcode.classify(opcodes::ClassifyContext::Legacy)
+        {
+            n as usize
+        } else {
+            match opcode {
+                OP_PUSHDATA1 => {
+                    // side effects: may write and break from the loop
+                    read_push_data_len!(&mut iter, 1, f)
+                }
+                OP_PUSHDATA2 => {
+                    // side effects: may write and break from the loop
+                    read_push_data_len!(&mut iter, 2, f)
+                }
+                OP_PUSHDATA4 => {
+                    // side effects: may write and break from the loop
+                    read_push_data_len!(&mut iter, 4, f)
+                }
+                _ => 0,
+            }
+        };
+
+        if at_least_one {
+            f.write_str(" ")?;
+        } else {
+            at_least_one = true;
+        }
+        // Write the opcode
+        if opcode == OP_PUSHBYTES_0 {
+            f.write_str("OP_0")?;
+        } else {
+            write!(f, "{:?}", opcode)?;
+        }
+        // Write any pushdata
+        if data_len > 0 {
+            f.write_str(" ")?;
+            if data_len <= iter.len() {
+                for ch in iter.by_ref().take(data_len) {
+                    write!(f, "{:02x}", ch)?;
+                }
+            } else {
+                f.write_str("<push past end>")?;
+                break;
+            }
+        }
+    }
+    Ok(())
+}
+
+/// Ways that a script might fail. Not everything is split up as
+/// much as it could be; patches welcome if more detailed errors
+/// would help you.
+#[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy)]
+#[non_exhaustive]
+pub enum Error {
+    /// Something did a non-minimal push; for more information see
+    /// <https://github.com/bitcoin/bips/blob/master/bip-0062.mediawiki#push-operators>
+    NonMinimalPush,
+    /// Some opcode expected a parameter but it was missing or truncated.
+    EarlyEndOfScript,
+    /// Tried to read an array off the stack as a number when it was more than 4 bytes.
+    NumericOverflow,
+    /// Error validating the script with bitcoinconsensus library.
+    #[cfg(feature = "bitcoinconsensus")]
+    BitcoinConsensus(bitcoinconsensus::Error),
+    /// Can not find the spent output.
+    UnknownSpentOutput(OutPoint),
+    /// Can not serialize the spending transaction.
+    Serialization,
+}
+
+// If bitcoinonsensus-std is off but bitcoinconsensus is present we patch the error type to
+// implement `std::error::Error`.
+#[cfg(all(feature = "std", feature = "bitcoinconsensus", not(feature = "bitcoinconsensus-std")))]
+mod bitcoinconsensus_hack {
+    use core::fmt;
+
+    #[repr(transparent)]
+    pub(crate) struct Error(bitcoinconsensus::Error);
+
+    impl fmt::Debug for Error {
+        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Debug::fmt(&self.0, f) }
+    }
+
+    impl fmt::Display for Error {
+        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(&self.0, f) }
+    }
+
+    // bitcoinconsensus::Error has no sources at this time
+    impl std::error::Error for Error {}
+
+    pub(crate) fn wrap_error(error: &bitcoinconsensus::Error) -> &Error {
+        // Unfortunately, we cannot have the reference inside `Error` struct because of the 'static
+        // bound on `source` return type, so we have to use unsafe to overcome the limitation.
+        // SAFETY: the type is repr(transparent) and the lifetimes match
+        unsafe { &*(error as *const _ as *const Error) }
+    }
+}
+
+#[cfg(not(all(
+    feature = "std",
+    feature = "bitcoinconsensus",
+    not(feature = "bitcoinconsensus-std")
+)))]
+mod bitcoinconsensus_hack {
+    #[allow(unused_imports)] // conditionally used
+    pub use core::convert::identity as wrap_error;
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        #[cfg(feature = "bitcoinconsensus")]
+        use internals::write_err;
+
+        match *self {
+            Error::NonMinimalPush => f.write_str("non-minimal datapush"),
+            Error::EarlyEndOfScript => f.write_str("unexpected end of script"),
+            Error::NumericOverflow =>
+                f.write_str("numeric overflow (number on stack larger than 4 bytes)"),
+            #[cfg(feature = "bitcoinconsensus")]
+            Error::BitcoinConsensus(ref e) =>
+                write_err!(f, "bitcoinconsensus verification failed"; bitcoinconsensus_hack::wrap_error(e)),
+            Error::UnknownSpentOutput(ref point) => write!(f, "unknown spent output: {}", point),
+            Error::Serialization =>
+                f.write_str("can not serialize the spending transaction in Transaction::verify()"),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match *self {
+            NonMinimalPush
+            | EarlyEndOfScript
+            | NumericOverflow
+            | UnknownSpentOutput(_)
+            | Serialization => None,
+            #[cfg(feature = "bitcoinconsensus")]
+            BitcoinConsensus(ref e) => Some(bitcoinconsensus_hack::wrap_error(e)),
+        }
+    }
+}
+
+// Our internal error proves that we only return these two cases from `read_uint_iter`.
+// Since it's private we don't bother with trait impls besides From.
+enum UintError {
+    EarlyEndOfScript,
+    NumericOverflow,
+}
+
+impl From<UintError> for Error {
+    fn from(error: UintError) -> Self {
+        match error {
+            UintError::EarlyEndOfScript => Error::EarlyEndOfScript,
+            UintError::NumericOverflow => Error::NumericOverflow,
+        }
+    }
+}
+
+#[cfg(feature = "bitcoinconsensus")]
+#[doc(hidden)]
+impl From<bitcoinconsensus::Error> for Error {
+    fn from(err: bitcoinconsensus::Error) -> Error { Error::BitcoinConsensus(err) }
+}
diff --git a/dash/src/blockdata/script/owned.rs b/dash/src/blockdata/script/owned.rs
new file mode 100644
index 000000000..b0c7b6e2b
--- /dev/null
+++ b/dash/src/blockdata/script/owned.rs
@@ -0,0 +1,357 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+#[cfg(doc)]
+use core::ops::Deref;
+
+use hashes::hex;
+use secp256k1::{Secp256k1, Verification};
+
+use crate::address::{WitnessProgram, WitnessVersion};
+use crate::blockdata::opcodes::all::*;
+use crate::blockdata::opcodes::{self};
+use crate::blockdata::script::{opcode_to_verify, Builder, Instruction, PushBytes, Script};
+use crate::hash_types::{PubkeyHash, ScriptHash, WPubkeyHash, WScriptHash};
+use crate::key::{PublicKey, TapTweak, TweakedPublicKey, UntweakedPublicKey};
+use crate::prelude::*;
+use crate::taproot::TapNodeHash;
+
+/// An owned, growable script.
+///
+/// `ScriptBuf` is the most common script type that has the ownership over the contents of the
+/// script. It has a close relationship with its borrowed counterpart, [`Script`].
+///
+/// Just as other similar types, this implements [`Deref`], so [deref coercions] apply. Also note
+/// that all the safety/validity restrictions that apply to [`Script`] apply to `ScriptBuf` as well.
+///
+/// [deref coercions]: https://doc.rust-lang.org/std/ops/trait.Deref.html#more-on-deref-coercion
+#[derive(Default, Clone, PartialOrd, Ord, PartialEq, Eq, Hash)]
+pub struct ScriptBuf(pub Vec<u8>);
+
+impl ScriptBuf {
+    /// Creates a new empty script.
+    pub fn new() -> Self { ScriptBuf(Vec::new()) }
+
+    /// Creates a new empty script with pre-allocated capacity.
+    pub fn with_capacity(capacity: usize) -> Self { ScriptBuf(Vec::with_capacity(capacity)) }
+
+    /// Pre-allocates at least `additional_len` bytes if needed.
+    ///
+    /// Reserves capacity for at least `additional_len` more bytes to be inserted in the given
+    /// script. The script may reserve more space to speculatively avoid frequent reallocations.
+    /// After calling `reserve`, capacity will be greater than or equal to
+    /// `self.len() + additional_len`. Does nothing if capacity is already sufficient.
+    ///
+    /// # Panics
+    ///
+    /// Panics if the new capacity exceeds `isize::MAX bytes`.
+    pub fn reserve(&mut self, additional_len: usize) { self.0.reserve(additional_len); }
+
+    /// Pre-allocates exactly `additional_len` bytes if needed.
+    ///
+    /// Unlike `reserve`, this will not deliberately over-allocate to speculatively avoid frequent
+    /// allocations. After calling `reserve_exact`, capacity will be greater than or equal to
+    /// `self.len() + additional`. Does nothing if the capacity is already sufficient.
+    ///
+    /// Note that the allocator may give the collection more space than it requests. Therefore,
+    /// capacity can not be relied upon to be precisely minimal. Prefer [`reserve`](Self::reserve)
+    /// if future insertions are expected.
+    ///
+    /// # Panics
+    ///
+    /// Panics if the new capacity exceeds `isize::MAX bytes`.
+    pub fn reserve_exact(&mut self, additional_len: usize) { self.0.reserve_exact(additional_len); }
+
+    /// Returns a reference to unsized script.
+    pub fn as_script(&self) -> &Script { Script::from_bytes(&self.0) }
+
+    /// Returns a mutable reference to unsized script.
+    pub fn as_mut_script(&mut self) -> &mut Script { Script::from_bytes_mut(&mut self.0) }
+
+    /// Creates a new script builder
+    pub fn builder() -> Builder { Builder::new() }
+
+    /// Generates P2PK-type of scriptPubkey.
+    pub fn new_p2pk(pubkey: &PublicKey) -> Self {
+        Builder::new().push_key(pubkey).push_opcode(OP_CHECKSIG).into_script()
+    }
+
+    /// Generates P2PKH-type of scriptPubkey.
+    pub fn new_p2pkh(pubkey_hash: &PubkeyHash) -> Self {
+        Builder::new()
+            .push_opcode(OP_DUP)
+            .push_opcode(OP_HASH160)
+            .push_slice(pubkey_hash)
+            .push_opcode(OP_EQUALVERIFY)
+            .push_opcode(OP_CHECKSIG)
+            .into_script()
+    }
+
+    /// Generates P2SH-type of scriptPubkey with a given hash of the redeem script.
+    pub fn new_p2sh(script_hash: &ScriptHash) -> Self {
+        Builder::new()
+            .push_opcode(OP_HASH160)
+            .push_slice(script_hash)
+            .push_opcode(OP_EQUAL)
+            .into_script()
+    }
+
+    /// Generates P2WPKH-type of scriptPubkey.
+    pub fn new_v0_p2wpkh(pubkey_hash: &WPubkeyHash) -> Self {
+        // pubkey hash is 20 bytes long, so it's safe to use `new_witness_program_unchecked` (Segwitv0)
+        ScriptBuf::new_witness_program_unchecked(WitnessVersion::V0, pubkey_hash)
+    }
+
+    /// Generates P2WSH-type of scriptPubkey with a given hash of the redeem script.
+    pub fn new_v0_p2wsh(script_hash: &WScriptHash) -> Self {
+        // script hash is 32 bytes long, so it's safe to use `new_witness_program_unchecked` (Segwitv0)
+        ScriptBuf::new_witness_program_unchecked(WitnessVersion::V0, script_hash)
+    }
+
+    /// Generates P2TR for script spending path using an internal public key and some optional
+    /// script tree merkle root.
+    pub fn new_v1_p2tr<C: Verification>(
+        secp: &Secp256k1<C>,
+        internal_key: UntweakedPublicKey,
+        merkle_root: Option<TapNodeHash>,
+    ) -> Self {
+        let (output_key, _) = internal_key.tap_tweak(secp, merkle_root);
+        // output key is 32 bytes long, so it's safe to use `new_witness_program_unchecked` (Segwitv1)
+        ScriptBuf::new_witness_program_unchecked(WitnessVersion::V1, output_key.serialize())
+    }
+
+    /// Generates P2TR for key spending path for a known [`TweakedPublicKey`].
+    pub fn new_v1_p2tr_tweaked(output_key: TweakedPublicKey) -> Self {
+        // output key is 32 bytes long, so it's safe to use `new_witness_program_unchecked` (Segwitv1)
+        ScriptBuf::new_witness_program_unchecked(WitnessVersion::V1, output_key.serialize())
+    }
+
+    /// Generates P2WSH-type of scriptPubkey with a given [`WitnessProgram`].
+    pub fn new_witness_program(witness_program: &WitnessProgram) -> Self {
+        Builder::new()
+            .push_opcode(witness_program.version().into())
+            .push_slice(witness_program.program())
+            .into_script()
+    }
+
+    /// Generates P2WSH-type of scriptPubkey with a given [`WitnessVersion`] and the program bytes.
+    /// Does not do any checks on version or program length.
+    ///
+    /// Convenience method used by `new_v0_p2wpkh`, `new_v0_p2wsh`, `new_v1_p2tr`, and
+    /// `new_v1_p2tr_tweaked`.
+    fn new_witness_program_unchecked<T: AsRef<PushBytes>>(
+        version: WitnessVersion,
+        program: T,
+    ) -> Self {
+        let program = program.as_ref();
+        debug_assert!(program.len() >= 2 && program.len() <= 40);
+        // In segwit v0, the program must be 20 or 32 bytes long.
+        debug_assert!(version != WitnessVersion::V0 || program.len() == 20 || program.len() == 32);
+        Builder::new().push_opcode(version.into()).push_slice(program).into_script()
+    }
+
+    /// Generates OP_RETURN-type of scriptPubkey for the given data.
+    pub fn new_op_return<T: AsRef<PushBytes>>(data: &T) -> Self {
+        Builder::new().push_opcode(OP_RETURN).push_slice(data).into_script()
+    }
+
+    /// Creates a [`ScriptBuf`] from a hex string.
+    pub fn from_hex(s: &str) -> Result<Self, hex::Error> {
+        use hashes::hex::FromHex;
+
+        let v = Vec::from_hex(s)?;
+        Ok(ScriptBuf::from_bytes(v))
+    }
+
+    /// Converts byte vector into script.
+    ///
+    /// This method doesn't (re)allocate.
+    pub fn from_bytes(bytes: Vec<u8>) -> Self { ScriptBuf(bytes) }
+
+    /// Converts the script into a byte vector.
+    ///
+    /// This method doesn't (re)allocate.
+    pub fn into_bytes(self) -> Vec<u8> { self.0 }
+
+    /// Computes the P2SH output corresponding to this redeem script.
+    pub fn to_p2sh(&self) -> ScriptBuf { ScriptBuf::new_p2sh(&self.script_hash()) }
+
+    /// Returns the script code used for spending a P2WPKH output if this script is a script pubkey
+    /// for a P2WPKH output. The `scriptCode` is described in [BIP143].
+    ///
+    /// [BIP143]: <https://github.com/bitcoin/bips/blob/99701f68a88ce33b2d0838eb84e115cef505b4c2/bip-0143.mediawiki>
+    pub fn p2wpkh_script_code(&self) -> Option<ScriptBuf> {
+        self.v0_p2wpkh().map(|wpkh| {
+            Builder::new()
+                .push_opcode(OP_DUP)
+                .push_opcode(OP_HASH160)
+                // The `self` script is 0x00, 0x14, <pubkey_hash>
+                .push_slice(wpkh)
+                .push_opcode(OP_EQUALVERIFY)
+                .push_opcode(OP_CHECKSIG)
+                .into_script()
+        })
+    }
+
+    /// Adds a single opcode to the script.
+    pub fn push_opcode(&mut self, data: opcodes::All) { self.0.push(data.to_u8()); }
+
+    /// Adds instructions to push some arbitrary data onto the stack.
+    pub fn push_slice<T: AsRef<PushBytes>>(&mut self, data: T) {
+        let data = data.as_ref();
+        self.reserve(Self::reserved_len_for_slice(data.len()));
+        self.push_slice_no_opt(data);
+    }
+
+    /// Pushes the slice without reserving
+    fn push_slice_no_opt(&mut self, data: &PushBytes) {
+        // Start with a PUSH opcode
+        match data.len() as u64 {
+            n if n < opcodes::Ordinary::OP_PUSHDATA1 as u64 => {
+                self.0.push(n as u8);
+            }
+            n if n < 0x100 => {
+                self.0.push(opcodes::Ordinary::OP_PUSHDATA1.to_u8());
+                self.0.push(n as u8);
+            }
+            n if n < 0x10000 => {
+                self.0.push(opcodes::Ordinary::OP_PUSHDATA2.to_u8());
+                self.0.push((n % 0x100) as u8);
+                self.0.push((n / 0x100) as u8);
+            }
+            n if n < 0x100000000 => {
+                self.0.push(opcodes::Ordinary::OP_PUSHDATA4.to_u8());
+                self.0.push((n % 0x100) as u8);
+                self.0.push(((n / 0x100) % 0x100) as u8);
+                self.0.push(((n / 0x10000) % 0x100) as u8);
+                self.0.push((n / 0x1000000) as u8);
+            }
+            _ => panic!("tried to put a 4bn+ sized object into a script!"),
+        }
+        // Then push the raw bytes
+        self.0.extend_from_slice(data.as_bytes());
+    }
+
+    /// Computes the sum of `len` and the lenght of an appropriate push opcode.
+    pub fn reserved_len_for_slice(len: usize) -> usize {
+        len + match len {
+            0..=0x4b => 1,
+            0x4c..=0xff => 2,
+            0x100..=0xffff => 3,
+            // we don't care about oversized, the other fn will panic anyway
+            _ => 5,
+        }
+    }
+
+    /// Add a single instruction to the script.
+    ///
+    /// ## Panics
+    ///
+    /// The method panics if the instruction is a data push with length greater or equal to
+    /// 0x100000000.
+    pub fn push_instruction(&mut self, instruction: Instruction<'_>) {
+        match instruction {
+            Instruction::Op(opcode) => self.push_opcode(opcode),
+            Instruction::PushBytes(bytes) => self.push_slice(bytes),
+        }
+    }
+
+    /// Like push_instruction, but avoids calling `reserve` to not re-check the length.
+    pub fn push_instruction_no_opt(&mut self, instruction: Instruction<'_>) {
+        match instruction {
+            Instruction::Op(opcode) => self.push_opcode(opcode),
+            Instruction::PushBytes(bytes) => self.push_slice_no_opt(bytes),
+        }
+    }
+
+    /// Adds an `OP_VERIFY` to the script or replaces the last opcode with VERIFY form.
+    ///
+    /// Some opcodes such as `OP_CHECKSIG` have a verify variant that works as if `VERIFY` was
+    /// in the script right after. To save space this function appends `VERIFY` only if
+    /// the most-recently-added opcode *does not* have an alternate `VERIFY` form. If it does
+    /// the last opcode is replaced. E.g., `OP_CHECKSIG` will become `OP_CHECKSIGVERIFY`.
+    ///
+    /// Note that existing `OP_*VERIFY` opcodes do not lead to the instruction being ignored
+    /// because `OP_VERIFY` consumes an item from the stack so ignoring them would change the
+    /// semantics.
+    ///
+    /// This function needs to iterate over the script to find the last instruction. Prefer
+    /// `Builder` if you're creating the script from scratch or if you want to push `OP_VERIFY`
+    /// multiple times.
+    pub fn scan_and_push_verify(&mut self) { self.push_verify(self.last_opcode()); }
+
+    /// Adds an `OP_VERIFY` to the script or changes the most-recently-added opcode to `VERIFY`
+    /// alternative.
+    ///
+    /// See the public fn [`Self::scan_and_push_verify`] to learn more.
+    pub fn push_verify(&mut self, last_opcode: Option<opcodes::All>) {
+        match opcode_to_verify(last_opcode) {
+            Some(opcode) => {
+                self.0.pop();
+                self.push_opcode(opcode);
+            }
+            None => self.push_opcode(OP_VERIFY),
+        }
+    }
+
+    /// Converts this `ScriptBuf` into a [boxed](Box) [`Script`].
+    ///
+    /// This method reallocates if the capacity is greater than lenght of the script but should not
+    /// when they are equal. If you know beforehand that you need to create a script of exact size
+    /// use [`reserve_exact`](Self::reserve_exact) before adding data to the script so that the
+    /// reallocation can be avoided.
+    #[must_use = "`self` will be dropped if the result is not used"]
+    #[inline]
+    pub fn into_boxed_script(self) -> Box<Script> {
+        // Copied from PathBuf::into_boxed_path
+        let rw = Box::into_raw(self.0.into_boxed_slice()) as *mut Script;
+        unsafe { Box::from_raw(rw) }
+    }
+}
+
+impl<'a> core::iter::FromIterator<Instruction<'a>> for ScriptBuf {
+    fn from_iter<T>(iter: T) -> Self
+    where
+        T: IntoIterator<Item = Instruction<'a>>,
+    {
+        let mut script = ScriptBuf::new();
+        script.extend(iter);
+        script
+    }
+}
+
+impl<'a> Extend<Instruction<'a>> for ScriptBuf {
+    fn extend<T>(&mut self, iter: T)
+    where
+        T: IntoIterator<Item = Instruction<'a>>,
+    {
+        let iter = iter.into_iter();
+        // Most of Bitcoin scripts have only a few opcodes, so we can avoid reallocations in many
+        // cases.
+        if iter.size_hint().1.map(|max| max < 6).unwrap_or(false) {
+            let mut iter = iter.fuse();
+            // `MaybeUninit` might be faster but we don't want to introduce more `unsafe` than
+            // required.
+            let mut head = [None; 5];
+            let mut total_size = 0;
+            for (head, instr) in head.iter_mut().zip(&mut iter) {
+                total_size += instr.script_serialized_len();
+                *head = Some(instr);
+            }
+            // Incorrect impl of `size_hint` breaks `Iterator` contract so we're free to panic.
+            assert!(
+                iter.next().is_none(),
+                "Buggy implementation of `Iterator` on {} returns invalid upper bound",
+                core::any::type_name::<T::IntoIter>()
+            );
+            self.reserve(total_size);
+            for instr in head.iter().cloned().flatten() {
+                self.push_instruction_no_opt(instr);
+            }
+        } else {
+            for instr in iter {
+                self.push_instruction(instr);
+            }
+        }
+    }
+}
diff --git a/dash/src/blockdata/script/push_bytes.rs b/dash/src/blockdata/script/push_bytes.rs
new file mode 100644
index 000000000..c503a7698
--- /dev/null
+++ b/dash/src/blockdata/script/push_bytes.rs
@@ -0,0 +1,415 @@
+//! Contains `PushBytes` & co
+
+use core::borrow::{Borrow, BorrowMut};
+use core::ops::{Deref, DerefMut};
+
+pub use primitive::*;
+
+#[allow(unused)]
+use crate::prelude::*;
+
+/// This module only contains required operations so that outside functions wouldn't accidentally
+/// break invariants. Therefore auditing this module should be sufficient.
+mod primitive {
+    use core::convert::{TryFrom, TryInto};
+    #[cfg(feature = "rust_v_1_53")]
+    use core::ops::Bound;
+    use core::ops::{
+        Index, Range, RangeFrom, RangeFull, RangeInclusive, RangeTo, RangeToInclusive,
+    };
+
+    use super::PushBytesError;
+    #[allow(unused)]
+    use crate::prelude::*;
+
+    #[cfg(any(target_pointer_width = "16", target_pointer_width = "32"))]
+    fn check_limit(len: usize) -> Result<(), PushBytesError> { Ok(()) }
+
+    #[cfg(not(any(target_pointer_width = "16", target_pointer_width = "32")))]
+    fn check_limit(len: usize) -> Result<(), PushBytesError> {
+        if len < 0x100000000 {
+            Ok(())
+        } else {
+            Err(PushBytesError { len })
+        }
+    }
+
+    /// Byte slices that can be in Bitcoin script.
+    ///
+    /// The encoding of Bitcoin script restricts data pushes to be less than 2^32 bytes long.
+    /// This type represents slices that are guaranteed to be within the limit so they can be put in
+    /// the script safely.
+    #[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
+    #[repr(transparent)]
+    pub struct PushBytes([u8]);
+
+    impl PushBytes {
+        /// Creates `&Self` without checking the length.
+        ///
+        /// ## Safety
+        ///
+        /// The caller is responsible for checking that the length is less than the [`LIMIT`].
+        unsafe fn from_slice_unchecked(bytes: &[u8]) -> &Self {
+            &*(bytes as *const [u8] as *const PushBytes)
+        }
+
+        /// Creates `&mut Self` without checking the length.
+        ///
+        /// ## Safety
+        ///
+        /// The caller is responsible for checking that the length is less than the [`LIMIT`].
+        unsafe fn from_mut_slice_unchecked(bytes: &mut [u8]) -> &mut Self {
+            &mut *(bytes as *mut [u8] as *mut PushBytes)
+        }
+
+        /// Creates an empty `PushBytes`.
+        pub fn empty() -> &'static Self {
+            // 0 < LIMIT
+            unsafe { Self::from_slice_unchecked(&[]) }
+        }
+
+        /// Returns the underlying bytes.
+        pub fn as_bytes(&self) -> &[u8] { &self.0 }
+
+        /// Returns the underlying mutbale bytes.
+        pub fn as_mut_bytes(&mut self) -> &mut [u8] { &mut self.0 }
+    }
+
+    macro_rules! delegate_index {
+        ($($type:ty),* $(,)?) => {
+            $(
+                /// Script subslicing operation - read [slicing safety](#slicing-safety)!
+                impl Index<$type> for PushBytes {
+                    type Output = Self;
+
+                    #[inline]
+                    #[track_caller]
+                    fn index(&self, index: $type) -> &Self::Output {
+                        // Slicing can not make slices longer
+                        unsafe {
+                            Self::from_slice_unchecked(&self.0[index])
+                        }
+                    }
+                }
+            )*
+        }
+    }
+
+    delegate_index!(
+        Range<usize>,
+        RangeFrom<usize>,
+        RangeTo<usize>,
+        RangeFull,
+        RangeInclusive<usize>,
+        RangeToInclusive<usize>
+    );
+    #[cfg(feature = "rust_v_1_53")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "rust_v_1_53")))]
+    delegate_index!((Bound<usize>, Bound<usize>));
+
+    impl Index<usize> for PushBytes {
+        type Output = u8;
+
+        #[inline]
+        #[track_caller]
+        fn index(&self, index: usize) -> &Self::Output { &self.0[index] }
+    }
+
+    impl<'a> TryFrom<&'a [u8]> for &'a PushBytes {
+        type Error = PushBytesError;
+
+        fn try_from(bytes: &'a [u8]) -> Result<Self, Self::Error> {
+            check_limit(bytes.len())?;
+            // We've just checked the length
+            Ok(unsafe { PushBytes::from_slice_unchecked(bytes) })
+        }
+    }
+
+    impl<'a> TryFrom<&'a mut [u8]> for &'a mut PushBytes {
+        type Error = PushBytesError;
+
+        fn try_from(bytes: &'a mut [u8]) -> Result<Self, Self::Error> {
+            check_limit(bytes.len())?;
+            // We've just checked the length
+            Ok(unsafe { PushBytes::from_mut_slice_unchecked(bytes) })
+        }
+    }
+
+    macro_rules! from_array {
+        ($($len:literal),* $(,)?) => {
+            $(
+                impl<'a> From<&'a [u8; $len]> for &'a PushBytes {
+                    fn from(bytes: &'a [u8; $len]) -> Self {
+                        // Check that the macro wasn't called with a wrong number.
+                        const _: () = [(); 1][($len >= 0x100000000u64) as usize];
+                        // We know the size of array statically and we checked macro input.
+                        unsafe { PushBytes::from_slice_unchecked(bytes) }
+                    }
+                }
+
+                impl<'a> From<&'a mut [u8; $len]> for &'a mut PushBytes {
+                    fn from(bytes: &'a mut [u8; $len]) -> Self {
+                        // Macro check already above, no need to duplicate.
+                        // We know the size of array statically and we checked macro input.
+                        unsafe { PushBytes::from_mut_slice_unchecked(bytes) }
+                    }
+                }
+
+                impl AsRef<PushBytes> for [u8; $len] {
+                    fn as_ref(&self) -> &PushBytes {
+                        self.into()
+                    }
+                }
+
+                impl AsMut<PushBytes> for [u8; $len] {
+                    fn as_mut(&mut self) -> &mut PushBytes {
+                        self.into()
+                    }
+                }
+
+                impl From<[u8; $len]> for PushBytesBuf {
+                    fn from(bytes: [u8; $len]) -> Self {
+                        PushBytesBuf(Vec::from(&bytes as &[_]))
+                    }
+                }
+
+                impl<'a> From<&'a [u8; $len]> for PushBytesBuf {
+                    fn from(bytes: &'a [u8; $len]) -> Self {
+                        PushBytesBuf(Vec::from(bytes as &[_]))
+                    }
+                }
+            )*
+        }
+    }
+
+    // Sizes up to 73 to support all pubkey and signature sizes
+    from_array! {
+        0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
+        25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
+        48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70,
+        71, 72, 73,
+    }
+
+    /// Owned, growable counterpart to `PushBytes`.
+    #[derive(Default, Debug, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+    pub struct PushBytesBuf(Vec<u8>);
+
+    impl PushBytesBuf {
+        /// Creates a new empty `PushBytesBuf`.
+        pub fn new() -> Self { PushBytesBuf(Vec::new()) }
+
+        /// Creates a new empty `PushBytesBuf` with reserved capacity.
+        pub fn with_capacity(capacity: usize) -> Self { PushBytesBuf(Vec::with_capacity(capacity)) }
+
+        /// Reserve capacity for `additional_capacity` bytes.
+        pub fn reserve(&mut self, additional_capacity: usize) {
+            self.0.reserve(additional_capacity)
+        }
+
+        /// Try pushing a single byte.
+        ///
+        /// ## Errors
+        ///
+        /// This method fails if `self` would exceed the limit.
+        #[allow(deprecated)]
+        pub fn push(&mut self, byte: u8) -> Result<(), PushBytesError> {
+            // This is OK on 32 bit archs since vec has its own check and this check is pointless.
+            check_limit(self.0.len().saturating_add(1))?;
+            self.0.push(byte);
+            Ok(())
+        }
+
+        /// Try appending a slice to `PushBytesBuf`
+        ///
+        /// ## Errors
+        ///
+        /// This method fails if `self` would exceed the limit.
+        pub fn extend_from_slice(&mut self, bytes: &[u8]) -> Result<(), PushBytesError> {
+            let len = self.0.len().saturating_add(bytes.len());
+            check_limit(len)?;
+            self.0.extend_from_slice(bytes);
+            Ok(())
+        }
+
+        /// Remove the last byte from buffer if any.
+        pub fn pop(&mut self) -> Option<u8> { self.0.pop() }
+
+        /// Remove the byte at `index` and return it.
+        ///
+        /// ## Panics
+        ///
+        /// This method panics if `index` is out of bounds.
+        #[track_caller]
+        pub fn remove(&mut self, index: usize) -> u8 { self.0.remove(index) }
+
+        /// Remove all bytes from buffer without affecting capacity.
+        pub fn clear(&mut self) { self.0.clear() }
+
+        /// Remove bytes from buffer past `len`.
+        pub fn truncate(&mut self, len: usize) { self.0.truncate(len) }
+
+        /// Extracts `PushBytes` slice
+        pub fn as_push_bytes(&self) -> &PushBytes {
+            // length guaranteed by our invariant
+            unsafe { PushBytes::from_slice_unchecked(&self.0) }
+        }
+
+        /// Extracts mutable `PushBytes` slice
+        pub fn as_mut_push_bytes(&mut self) -> &mut PushBytes {
+            // length guaranteed by our invariant
+            unsafe { PushBytes::from_mut_slice_unchecked(&mut self.0) }
+        }
+
+        /// Accesses inner `Vec` - provided for `super` to impl other methods.
+        pub fn inner(&self) -> &Vec<u8> { &self.0 }
+    }
+
+    impl From<PushBytesBuf> for Vec<u8> {
+        fn from(value: PushBytesBuf) -> Self { value.0 }
+    }
+
+    impl TryFrom<Vec<u8>> for PushBytesBuf {
+        type Error = PushBytesError;
+
+        fn try_from(vec: Vec<u8>) -> Result<Self, Self::Error> {
+            // check len
+            let _: &PushBytes = vec.as_slice().try_into()?;
+            Ok(PushBytesBuf(vec))
+        }
+    }
+
+    impl ToOwned for PushBytes {
+        type Owned = PushBytesBuf;
+
+        fn to_owned(&self) -> Self::Owned { PushBytesBuf(self.0.to_owned()) }
+    }
+}
+
+impl PushBytes {
+    /// Returns the number of bytes in buffer.
+    pub fn len(&self) -> usize { self.as_bytes().len() }
+
+    /// Returns true if the buffer contains zero bytes.
+    pub fn is_empty(&self) -> bool { self.as_bytes().is_empty() }
+}
+
+impl PushBytesBuf {
+    /// Returns the number of bytes in buffer.
+    pub fn len(&self) -> usize { self.inner().len() }
+
+    /// Returns the number of bytes the buffer can contain without reallocating.
+    pub fn capacity(&self) -> usize { self.inner().capacity() }
+
+    /// Returns true if the buffer contains zero bytes.
+    pub fn is_empty(&self) -> bool { self.inner().is_empty() }
+}
+
+impl AsRef<[u8]> for PushBytes {
+    fn as_ref(&self) -> &[u8] { self.as_bytes() }
+}
+
+impl AsMut<[u8]> for PushBytes {
+    fn as_mut(&mut self) -> &mut [u8] { self.as_mut_bytes() }
+}
+
+impl Deref for PushBytesBuf {
+    type Target = PushBytes;
+
+    fn deref(&self) -> &Self::Target { self.as_push_bytes() }
+}
+
+impl DerefMut for PushBytesBuf {
+    fn deref_mut(&mut self) -> &mut Self::Target { self.as_mut_push_bytes() }
+}
+
+impl AsRef<PushBytes> for PushBytes {
+    fn as_ref(&self) -> &PushBytes { self }
+}
+
+impl AsMut<PushBytes> for PushBytes {
+    fn as_mut(&mut self) -> &mut PushBytes { self }
+}
+
+impl AsRef<PushBytes> for PushBytesBuf {
+    fn as_ref(&self) -> &PushBytes { self.as_push_bytes() }
+}
+
+impl AsMut<PushBytes> for PushBytesBuf {
+    fn as_mut(&mut self) -> &mut PushBytes { self.as_mut_push_bytes() }
+}
+
+impl Borrow<PushBytes> for PushBytesBuf {
+    fn borrow(&self) -> &PushBytes { self.as_push_bytes() }
+}
+
+impl BorrowMut<PushBytes> for PushBytesBuf {
+    fn borrow_mut(&mut self) -> &mut PushBytes { self.as_mut_push_bytes() }
+}
+
+/// Reports information about failed conversion into `PushBytes`.
+///
+/// This should not be needed by general public, except as an additional bound on `TryFrom` when
+/// converting to `WitnessProgram`.
+pub trait PushBytesErrorReport {
+    /// How many bytes the input had.
+    fn input_len(&self) -> usize;
+}
+
+impl PushBytesErrorReport for core::convert::Infallible {
+    #[inline]
+    fn input_len(&self) -> usize { match *self {} }
+}
+
+pub use error::*;
+
+#[cfg(any(target_pointer_width = "16", target_pointer_width = "32"))]
+mod error {
+    use core::fmt;
+
+    /// Error returned on attempt to create too large `PushBytes`.
+    #[allow(unused)]
+    #[derive(Debug, Clone)]
+    pub struct PushBytesError {
+        never: core::convert::Infallible,
+    }
+
+    impl super::PushBytesErrorReport for PushBytesError {
+        #[inline]
+        fn input_len(&self) -> usize { match self.never {} }
+    }
+
+    impl fmt::Display for PushBytesError {
+        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { match self.never {} }
+    }
+}
+
+// we have 64 bits in mind, but even for esoteric sizes, this code is correct, since it's the
+// conservative one that checks for errors
+#[cfg(not(any(target_pointer_width = "16", target_pointer_width = "32")))]
+mod error {
+    use core::fmt;
+
+    /// Error returned on attempt to create too large `PushBytes`.
+    #[derive(Debug, Clone)]
+    pub struct PushBytesError {
+        /// How long the input was.
+        pub len: usize,
+    }
+
+    impl super::PushBytesErrorReport for PushBytesError {
+        #[inline]
+        fn input_len(&self) -> usize { self.len }
+    }
+
+    impl fmt::Display for PushBytesError {
+        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+            write!(
+                f,
+                "attempt to prepare {} bytes to be pushed into script but the limit is 2^32-1",
+                self.len
+            )
+        }
+    }
+}
+
+crate::error::impl_std_error!(PushBytesError);
diff --git a/dash/src/blockdata/script/tests.rs b/dash/src/blockdata/script/tests.rs
new file mode 100644
index 000000000..1675649eb
--- /dev/null
+++ b/dash/src/blockdata/script/tests.rs
@@ -0,0 +1,695 @@
+use core::str::FromStr;
+
+use hashes::Hash;
+use hex_lit::hex;
+
+use super::*;
+use crate::blockdata::opcodes;
+use crate::consensus::encode::{deserialize, serialize};
+use crate::crypto::key::{PublicKey, XOnlyPublicKey};
+use crate::hash_types::{PubkeyHash, ScriptHash, WPubkeyHash, WScriptHash};
+use crate::psbt::serialize::Serialize;
+
+#[test]
+#[rustfmt::skip]
+fn script() {
+    let mut comp = vec![];
+    let mut script = Builder::new();
+    assert_eq!(script.as_bytes(), &comp[..]);
+
+    // small ints
+    script = script.push_int(1);  comp.push(81u8); assert_eq!(script.as_bytes(), &comp[..]);
+    script = script.push_int(0);  comp.push(0u8);  assert_eq!(script.as_bytes(), &comp[..]);
+    script = script.push_int(4);  comp.push(84u8); assert_eq!(script.as_bytes(), &comp[..]);
+    script = script.push_int(-1); comp.push(79u8); assert_eq!(script.as_bytes(), &comp[..]);
+    // forced scriptint
+    script = script.push_int_non_minimal(4); comp.extend([1u8, 4].iter().cloned()); assert_eq!(script.as_bytes(), &comp[..]);
+    // big ints
+    script = script.push_int(17); comp.extend([1u8, 17].iter().cloned()); assert_eq!(script.as_bytes(), &comp[..]);
+    script = script.push_int(10000); comp.extend([2u8, 16, 39].iter().cloned()); assert_eq!(script.as_bytes(), &comp[..]);
+    // notice the sign bit set here, hence the extra zero/128 at the end
+    script = script.push_int(10000000); comp.extend([4u8, 128, 150, 152, 0].iter().cloned()); assert_eq!(script.as_bytes(), &comp[..]);
+    script = script.push_int(-10000000); comp.extend([4u8, 128, 150, 152, 128].iter().cloned()); assert_eq!(script.as_bytes(), &comp[..]);
+
+    // data
+    script = script.push_slice(b"NRA4VR"); comp.extend([6u8, 78, 82, 65, 52, 86, 82].iter().cloned()); assert_eq!(script.as_bytes(), &comp[..]);
+
+    // keys
+    const KEYSTR1: &str = "21032e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af";
+    let key = PublicKey::from_str(&KEYSTR1[2..]).unwrap();
+    script = script.push_key(&key); comp.extend_from_slice(&hex!(KEYSTR1)); assert_eq!(script.as_bytes(), &comp[..]);
+    const KEYSTR2: &str = "41042e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af191923a2964c177f5b5923ae500fca49e99492d534aa3759d6b25a8bc971b133";
+    let key = PublicKey::from_str(&KEYSTR2[2..]).unwrap();
+    script = script.push_key(&key); comp.extend_from_slice(&hex!(KEYSTR2)); assert_eq!(script.as_bytes(), &comp[..]);
+
+    // opcodes
+    script = script.push_opcode(OP_CHECKSIG); comp.push(0xACu8); assert_eq!(script.as_bytes(), &comp[..]);
+    script = script.push_opcode(OP_CHECKSIG); comp.push(0xACu8); assert_eq!(script.as_bytes(), &comp[..]);
+}
+
+#[test]
+fn p2pk_pubkey_bytes_valid_key_and_valid_script_returns_expected_key() {
+    let key_str = "0411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3";
+    let key = PublicKey::from_str(key_str).unwrap();
+    let p2pk = Script::builder().push_key(&key).push_opcode(OP_CHECKSIG).into_script();
+    let actual = p2pk.p2pk_pubkey_bytes().unwrap();
+    assert_eq!(actual.to_vec(), key.to_bytes());
+}
+
+#[test]
+fn p2pk_pubkey_bytes_no_checksig_returns_none() {
+    let key_str = "0411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3";
+    let key = PublicKey::from_str(key_str).unwrap();
+    let no_checksig = Script::builder().push_key(&key).into_script();
+    assert_eq!(no_checksig.p2pk_pubkey_bytes(), None);
+}
+
+#[test]
+fn p2pk_pubkey_bytes_emptry_script_returns_none() {
+    let empty_script = Script::builder().into_script();
+    assert!(empty_script.p2pk_pubkey_bytes().is_none());
+}
+
+#[test]
+fn p2pk_pubkey_bytes_no_key_returns_none() {
+    // scripts with no key should return None
+    let no_push_bytes = Script::builder().push_opcode(OP_CHECKSIG).into_script();
+    assert!(no_push_bytes.p2pk_pubkey_bytes().is_none());
+}
+
+#[test]
+fn p2pk_pubkey_bytes_different_op_code_returns_none() {
+    let key_str = "0411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3";
+    let key = PublicKey::from_str(key_str).unwrap();
+    let different_op_code = Script::builder().push_key(&key).push_opcode(OP_NOP).into_script();
+    assert!(different_op_code.p2pk_pubkey_bytes().is_none());
+}
+
+#[test]
+fn p2pk_pubkey_bytes_incorrect_key_size_returns_none() {
+    // 63 byte key
+    let malformed_key = b"21032e58afe51f9ed8ad3cc7897f634d881fdbe49816429ded8156bebd2ffd1";
+    let invalid_p2pk_script =
+        Script::builder().push_slice(malformed_key).push_opcode(OP_CHECKSIG).into_script();
+    assert!(invalid_p2pk_script.p2pk_pubkey_bytes().is_none());
+}
+
+#[test]
+fn p2pk_pubkey_bytes_invalid_key_returns_some() {
+    let malformed_key = b"21032e58afe51f9ed8ad3cc7897f634d881fdbe49816429ded8156bebd2ffd1ux";
+    let invalid_key_script =
+        Script::builder().push_slice(malformed_key).push_opcode(OP_CHECKSIG).into_script();
+    assert!(invalid_key_script.p2pk_pubkey_bytes().is_some());
+}
+
+#[test]
+fn p2pk_pubkey_bytes_compressed_key_returns_expected_key() {
+    let compressed_key_str = "0311db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5c";
+    let key = PublicKey::from_str(compressed_key_str).unwrap();
+    let p2pk = Script::builder().push_key(&key).push_opcode(OP_CHECKSIG).into_script();
+    let actual = p2pk.p2pk_pubkey_bytes().unwrap();
+    assert_eq!(actual.to_vec(), key.to_bytes());
+}
+
+#[test]
+fn p2pk_public_key_valid_key_and_valid_script_returns_expected_key() {
+    let key_str = "0411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3";
+    let key = PublicKey::from_str(key_str).unwrap();
+    let p2pk = Script::builder().push_key(&key).push_opcode(OP_CHECKSIG).into_script();
+    let actual = p2pk.p2pk_public_key().unwrap();
+    assert_eq!(actual, key);
+}
+
+#[test]
+fn p2pk_public_key_no_checksig_returns_none() {
+    let key_str = "0411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3";
+    let key = PublicKey::from_str(key_str).unwrap();
+    let no_checksig = Script::builder().push_key(&key).into_script();
+    assert_eq!(no_checksig.p2pk_public_key(), None);
+}
+
+#[test]
+fn p2pk_public_key_empty_script_returns_none() {
+    let empty_script = Script::builder().into_script();
+    assert!(empty_script.p2pk_public_key().is_none());
+}
+
+#[test]
+fn p2pk_public_key_no_key_returns_none() {
+    let no_push_bytes = Script::builder().push_opcode(OP_CHECKSIG).into_script();
+    assert!(no_push_bytes.p2pk_public_key().is_none());
+}
+
+#[test]
+fn p2pk_public_key_different_op_code_returns_none() {
+    let key_str = "0411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3";
+    let key = PublicKey::from_str(key_str).unwrap();
+    let different_op_code = Script::builder().push_key(&key).push_opcode(OP_NOP).into_script();
+    assert!(different_op_code.p2pk_public_key().is_none());
+}
+
+#[test]
+fn p2pk_public_key_incorrect_size_returns_none() {
+    let malformed_key = b"21032e58afe51f9ed8ad3cc7897f634d881fdbe49816429ded8156bebd2ffd1";
+    let malformed_key_script =
+        Script::builder().push_slice(malformed_key).push_opcode(OP_CHECKSIG).into_script();
+    assert!(malformed_key_script.p2pk_public_key().is_none());
+}
+
+#[test]
+fn p2pk_public_key_invalid_key_returns_none() {
+    let malformed_key = b"21032e58afe51f9ed8ad3cc7897f634d881fdbe49816429ded8156bebd2ffd1ux";
+    let invalid_key_script =
+        Script::builder().push_slice(malformed_key).push_opcode(OP_CHECKSIG).into_script();
+    assert!(invalid_key_script.p2pk_public_key().is_none());
+}
+
+#[test]
+fn p2pk_public_key_compressed_key_returns_some() {
+    let compressed_key_str = "0311db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5c";
+    let key = PublicKey::from_str(compressed_key_str).unwrap();
+    let p2pk = Script::builder().push_key(&key).push_opcode(OP_CHECKSIG).into_script();
+    let actual = p2pk.p2pk_public_key().unwrap();
+    assert_eq!(actual, key);
+}
+
+#[test]
+fn script_x_only_key() {
+    // Notice the "20" which prepends the keystr. That 20 is hexidecimal for "32". The Builder automatically adds the 32 opcode
+    // to our script in order to give a heads up to the script compiler that it should add the next 32 bytes to the stack.
+    // From: https://github.com/bitcoin-core/btcdeb/blob/e8c2750c4a4702768c52d15640ed03bf744d2601/doc/tapscript-example.md?plain=1#L43
+    const KEYSTR: &str = "209997a497d964fc1a62885b05a51166a65a90df00492c8d7cf61d6accf54803be";
+    let x_only_key = XOnlyPublicKey::from_str(&KEYSTR[2..]).unwrap();
+    let script = Builder::new().push_x_only_key(&x_only_key);
+    assert_eq!(script.into_bytes(), &hex!(KEYSTR) as &[u8]);
+}
+
+#[test]
+fn script_builder() {
+    // from txid 3bb5e6434c11fb93f64574af5d116736510717f2c595eb45b52c28e31622dfff which was in my mempool when I wrote the test
+    let script = Builder::new()
+        .push_opcode(OP_DUP)
+        .push_opcode(OP_HASH160)
+        .push_slice(hex!("16e1ae70ff0fa102905d4af297f6912bda6cce19"))
+        .push_opcode(OP_EQUALVERIFY)
+        .push_opcode(OP_CHECKSIG)
+        .into_script();
+    assert_eq!(script.to_hex_string(), "76a91416e1ae70ff0fa102905d4af297f6912bda6cce1988ac");
+}
+
+#[test]
+fn script_generators() {
+    let pubkey =
+        PublicKey::from_str("0234e6a79c5359c613762d537e0e19d86c77c1666d8c9ab050f23acd198e97f93e")
+            .unwrap();
+    assert!(ScriptBuf::new_p2pk(&pubkey).is_p2pk());
+
+    let pubkey_hash = PubkeyHash::hash(&pubkey.inner.serialize());
+    assert!(ScriptBuf::new_p2pkh(&pubkey_hash).is_p2pkh());
+
+    let wpubkey_hash = WPubkeyHash::hash(&pubkey.inner.serialize());
+    assert!(ScriptBuf::new_v0_p2wpkh(&wpubkey_hash).is_v0_p2wpkh());
+
+    let script = Builder::new().push_opcode(OP_NUMEQUAL).push_verify().into_script();
+    let script_hash = ScriptHash::hash(&script.serialize());
+    let p2sh = ScriptBuf::new_p2sh(&script_hash);
+    assert!(p2sh.is_p2sh());
+    assert_eq!(script.to_p2sh(), p2sh);
+
+    let wscript_hash = WScriptHash::hash(&script.serialize());
+    let p2wsh = ScriptBuf::new_v0_p2wsh(&wscript_hash);
+    assert!(p2wsh.is_v0_p2wsh());
+    assert_eq!(script.to_v0_p2wsh(), p2wsh);
+
+    // Test data are taken from the second output of
+    // 2ccb3a1f745eb4eefcf29391460250adda5fab78aaddb902d25d3cd97d9d8e61 transaction
+    let data = hex!("aa21a9ed20280f53f2d21663cac89e6bd2ad19edbabb048cda08e73ed19e9268d0afea2a");
+    let op_return = ScriptBuf::new_op_return(&data);
+    assert!(op_return.is_op_return());
+    assert_eq!(
+        op_return.to_hex_string(),
+        "6a24aa21a9ed20280f53f2d21663cac89e6bd2ad19edbabb048cda08e73ed19e9268d0afea2a"
+    );
+}
+
+#[test]
+fn script_builder_verify() {
+    let simple = Builder::new().push_verify().into_script();
+    assert_eq!(simple.to_hex_string(), "69");
+    let simple2 = Builder::from(vec![]).push_verify().into_script();
+    assert_eq!(simple2.to_hex_string(), "69");
+
+    let nonverify = Builder::new().push_verify().push_verify().into_script();
+    assert_eq!(nonverify.to_hex_string(), "6969");
+    let nonverify2 = Builder::from(vec![0x69]).push_verify().into_script();
+    assert_eq!(nonverify2.to_hex_string(), "6969");
+
+    let equal = Builder::new().push_opcode(OP_EQUAL).push_verify().into_script();
+    assert_eq!(equal.to_hex_string(), "88");
+    let equal2 = Builder::from(vec![0x87]).push_verify().into_script();
+    assert_eq!(equal2.to_hex_string(), "88");
+
+    let numequal = Builder::new().push_opcode(OP_NUMEQUAL).push_verify().into_script();
+    assert_eq!(numequal.to_hex_string(), "9d");
+    let numequal2 = Builder::from(vec![0x9c]).push_verify().into_script();
+    assert_eq!(numequal2.to_hex_string(), "9d");
+
+    let checksig = Builder::new().push_opcode(OP_CHECKSIG).push_verify().into_script();
+    assert_eq!(checksig.to_hex_string(), "ad");
+    let checksig2 = Builder::from(vec![0xac]).push_verify().into_script();
+    assert_eq!(checksig2.to_hex_string(), "ad");
+
+    let checkmultisig = Builder::new().push_opcode(OP_CHECKMULTISIG).push_verify().into_script();
+    assert_eq!(checkmultisig.to_hex_string(), "af");
+    let checkmultisig2 = Builder::from(vec![0xae]).push_verify().into_script();
+    assert_eq!(checkmultisig2.to_hex_string(), "af");
+
+    let trick_slice = Builder::new()
+        .push_slice([0xae]) // OP_CHECKMULTISIG
+        .push_verify()
+        .into_script();
+    assert_eq!(trick_slice.to_hex_string(), "01ae69");
+    let trick_slice2 = Builder::from(vec![0x01, 0xae]).push_verify().into_script();
+    assert_eq!(trick_slice2.to_hex_string(), "01ae69");
+}
+
+#[test]
+fn script_serialize() {
+    let hex_script = hex!("6c493046022100f93bb0e7d8db7bd46e40132d1f8242026e045f03a0efe71bbb8e3f475e970d790221009337cd7f1f929f00cc6ff01f03729b069a7c21b59b1736ddfee5db5946c5da8c0121033b9b137ee87d5a812d6f506efdd37f0affa7ffc310711c06c7f3e097c9447c52");
+    let script: Result<ScriptBuf, _> = deserialize(&hex_script);
+    assert!(script.is_ok());
+    assert_eq!(serialize(&script.unwrap()), &hex_script as &[u8]);
+}
+
+#[test]
+fn scriptint_round_trip() {
+    fn build_scriptint(n: i64) -> Vec<u8> {
+        let mut buf = [0u8; 8];
+        let len = write_scriptint(&mut buf, n);
+        assert!(len <= 8);
+        buf[..len].to_vec()
+    }
+
+    assert_eq!(build_scriptint(-1), vec![0x81]);
+    assert_eq!(build_scriptint(255), vec![255, 0]);
+    assert_eq!(build_scriptint(256), vec![0, 1]);
+    assert_eq!(build_scriptint(257), vec![1, 1]);
+    assert_eq!(build_scriptint(511), vec![255, 1]);
+    let test_vectors = [
+        10,
+        100,
+        255,
+        256,
+        1000,
+        10000,
+        25000,
+        200000,
+        5000000,
+        1000000000,
+        (1 << 31) - 1,
+        -((1 << 31) - 1),
+    ];
+    for &i in test_vectors.iter() {
+        assert_eq!(Ok(i), read_scriptint(&build_scriptint(i)));
+        assert_eq!(Ok(-i), read_scriptint(&build_scriptint(-i)));
+    }
+    assert!(read_scriptint(&build_scriptint(1 << 31)).is_err());
+    assert!(read_scriptint(&build_scriptint(-(1 << 31))).is_err());
+}
+
+#[test]
+fn non_minimal_scriptints() {
+    assert_eq!(read_scriptint(&[0x80, 0x00]), Ok(0x80));
+    assert_eq!(read_scriptint(&[0xff, 0x00]), Ok(0xff));
+    assert_eq!(read_scriptint(&[0x8f, 0x00, 0x00]), Err(Error::NonMinimalPush));
+    assert_eq!(read_scriptint(&[0x7f, 0x00]), Err(Error::NonMinimalPush));
+}
+
+#[test]
+fn script_hashes() {
+    let script = ScriptBuf::from_hex("410446ef0102d1ec5240f0d061a4246c1bdef63fc3dbab7733052fbbf0ecd8f41fc26bf049ebb4f9527f374280259e7cfa99c48b0e3f39c51347a19a5819651503a5ac").unwrap();
+    assert_eq!(script.script_hash().to_string(), "8292bcfbef1884f73c813dfe9c82fd7e814291ea");
+    assert_eq!(
+        script.wscript_hash().to_string(),
+        "3e1525eb183ad4f9b3c5fa3175bdca2a52e947b135bbb90383bf9f6408e2c324"
+    );
+    assert_eq!(
+        ScriptBuf::from_hex("20d85a959b0290bf19bb89ed43c916be835475d013da4b362117393e25a48229b8ac")
+            .unwrap()
+            .tapscript_leaf_hash()
+            .to_string(),
+        "5b75adecf53548f3ec6ad7d78383bf84cc57b55a3127c72b9a2481752dd88b21"
+    );
+}
+
+#[test]
+fn provably_unspendable_test() {
+    // p2pk
+    assert!(!ScriptBuf::from_hex("410446ef0102d1ec5240f0d061a4246c1bdef63fc3dbab7733052fbbf0ecd8f41fc26bf049ebb4f9527f374280259e7cfa99c48b0e3f39c51347a19a5819651503a5ac").unwrap().is_provably_unspendable());
+    assert!(!ScriptBuf::from_hex("4104ea1feff861b51fe3f5f8a3b12d0f4712db80e919548a80839fc47c6a21e66d957e9c5d8cd108c7a2d2324bad71f9904ac0ae7336507d785b17a2c115e427a32fac").unwrap().is_provably_unspendable());
+    // p2pkhash
+    assert!(!ScriptBuf::from_hex("76a914ee61d57ab51b9d212335b1dba62794ac20d2bcf988ac")
+        .unwrap()
+        .is_provably_unspendable());
+    assert!(ScriptBuf::from_hex("6aa9149eb21980dc9d413d8eac27314938b9da920ee53e87")
+        .unwrap()
+        .is_provably_unspendable());
+}
+
+#[test]
+fn op_return_test() {
+    assert!(ScriptBuf::from_hex("6aa9149eb21980dc9d413d8eac27314938b9da920ee53e87")
+        .unwrap()
+        .is_op_return());
+    assert!(!ScriptBuf::from_hex("76a914ee61d57ab51b9d212335b1dba62794ac20d2bcf988ac")
+        .unwrap()
+        .is_op_return());
+    assert!(!ScriptBuf::from_hex("").unwrap().is_op_return());
+}
+
+#[test]
+#[cfg(feature = "serde")]
+fn script_json_serialize() {
+    use serde_json;
+
+    let original = ScriptBuf::from_hex("827651a0698faaa9a8a7a687").unwrap();
+    let json = serde_json::to_value(&original).unwrap();
+    assert_eq!(json, serde_json::Value::String("827651a0698faaa9a8a7a687".to_owned()));
+    let des = serde_json::from_value::<ScriptBuf>(json).unwrap();
+    assert_eq!(original, des);
+}
+
+#[test]
+fn script_asm() {
+    assert_eq!(
+        ScriptBuf::from_hex("6363636363686868686800").unwrap().to_asm_string(),
+        "OP_IF OP_IF OP_IF OP_IF OP_IF OP_ENDIF OP_ENDIF OP_ENDIF OP_ENDIF OP_ENDIF OP_0"
+    );
+    assert_eq!(
+        ScriptBuf::from_hex("6363636363686868686800").unwrap().to_asm_string(),
+        "OP_IF OP_IF OP_IF OP_IF OP_IF OP_ENDIF OP_ENDIF OP_ENDIF OP_ENDIF OP_ENDIF OP_0"
+    );
+    assert_eq!(ScriptBuf::from_hex("2102715e91d37d239dea832f1460e91e368115d8ca6cc23a7da966795abad9e3b699ac").unwrap().to_asm_string(),
+               "OP_PUSHBYTES_33 02715e91d37d239dea832f1460e91e368115d8ca6cc23a7da966795abad9e3b699 OP_CHECKSIG");
+    // Elements Alpha peg-out transaction with some signatures removed for brevity. Mainly to test PUSHDATA1
+    assert_eq!(ScriptBuf::from_hex("0047304402202457e78cc1b7f50d0543863c27de75d07982bde8359b9e3316adec0aec165f2f02200203fd331c4e4a4a02f48cf1c291e2c0d6b2f7078a784b5b3649fca41f8794d401004cf1552103244e602b46755f24327142a0517288cebd159eccb6ccf41ea6edf1f601e9af952103bbbacc302d19d29dbfa62d23f37944ae19853cf260c745c2bea739c95328fcb721039227e83246bd51140fe93538b2301c9048be82ef2fb3c7fc5d78426ed6f609ad210229bf310c379b90033e2ecb07f77ecf9b8d59acb623ab7be25a0caed539e2e6472103703e2ed676936f10b3ce9149fa2d4a32060fb86fa9a70a4efe3f21d7ab90611921031e9b7c6022400a6bb0424bbcde14cff6c016b91ee3803926f3440abf5c146d05210334667f975f55a8455d515a2ef1c94fdfa3315f12319a14515d2a13d82831f62f57ae").unwrap().to_asm_string(),
+               "OP_0 OP_PUSHBYTES_71 304402202457e78cc1b7f50d0543863c27de75d07982bde8359b9e3316adec0aec165f2f02200203fd331c4e4a4a02f48cf1c291e2c0d6b2f7078a784b5b3649fca41f8794d401 OP_0 OP_PUSHDATA1 552103244e602b46755f24327142a0517288cebd159eccb6ccf41ea6edf1f601e9af952103bbbacc302d19d29dbfa62d23f37944ae19853cf260c745c2bea739c95328fcb721039227e83246bd51140fe93538b2301c9048be82ef2fb3c7fc5d78426ed6f609ad210229bf310c379b90033e2ecb07f77ecf9b8d59acb623ab7be25a0caed539e2e6472103703e2ed676936f10b3ce9149fa2d4a32060fb86fa9a70a4efe3f21d7ab90611921031e9b7c6022400a6bb0424bbcde14cff6c016b91ee3803926f3440abf5c146d05210334667f975f55a8455d515a2ef1c94fdfa3315f12319a14515d2a13d82831f62f57ae");
+    // Various weird scripts found in transaction 6d7ed9914625c73c0288694a6819196a27ef6c08f98e1270d975a8e65a3dc09a
+    // which triggerred overflow bugs on 32-bit machines in script formatting in the past.
+    assert_eq!(
+        ScriptBuf::from_hex("01").unwrap().to_asm_string(),
+        "OP_PUSHBYTES_1 <push past end>"
+    );
+    assert_eq!(
+        ScriptBuf::from_hex("0201").unwrap().to_asm_string(),
+        "OP_PUSHBYTES_2 <push past end>"
+    );
+    assert_eq!(ScriptBuf::from_hex("4c").unwrap().to_asm_string(), "<unexpected end>");
+    assert_eq!(
+        ScriptBuf::from_hex("4c0201").unwrap().to_asm_string(),
+        "OP_PUSHDATA1 <push past end>"
+    );
+    assert_eq!(ScriptBuf::from_hex("4d").unwrap().to_asm_string(), "<unexpected end>");
+    assert_eq!(
+        ScriptBuf::from_hex("4dffff01").unwrap().to_asm_string(),
+        "OP_PUSHDATA2 <push past end>"
+    );
+    assert_eq!(
+        ScriptBuf::from_hex("4effffffff01").unwrap().to_asm_string(),
+        "OP_PUSHDATA4 <push past end>"
+    );
+}
+
+#[test]
+fn script_buf_collect() {
+    assert_eq!(&core::iter::empty::<Instruction<'_>>().collect::<ScriptBuf>(), Script::empty());
+    let script = ScriptBuf::from_hex("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").unwrap();
+    assert_eq!(script.instructions().collect::<Result<ScriptBuf, _>>().unwrap(), script);
+}
+
+#[test]
+fn script_p2sh_p2p2k_template() {
+    // random outputs I picked out of the mempool
+    assert!(ScriptBuf::from_hex("76a91402306a7c23f3e8010de41e9e591348bb83f11daa88ac")
+        .unwrap()
+        .is_p2pkh());
+    assert!(!ScriptBuf::from_hex("76a91402306a7c23f3e8010de41e9e591348bb83f11daa88ac")
+        .unwrap()
+        .is_p2sh());
+    assert!(!ScriptBuf::from_hex("76a91402306a7c23f3e8010de41e9e591348bb83f11daa88ad")
+        .unwrap()
+        .is_p2pkh());
+    assert!(!ScriptBuf::from_hex("").unwrap().is_p2pkh());
+    assert!(ScriptBuf::from_hex("a914acc91e6fef5c7f24e5c8b3f11a664aa8f1352ffd87")
+        .unwrap()
+        .is_p2sh());
+    assert!(!ScriptBuf::from_hex("a914acc91e6fef5c7f24e5c8b3f11a664aa8f1352ffd87")
+        .unwrap()
+        .is_p2pkh());
+    assert!(!ScriptBuf::from_hex("a314acc91e6fef5c7f24e5c8b3f11a664aa8f1352ffd87")
+        .unwrap()
+        .is_p2sh());
+}
+
+#[test]
+fn script_p2pk() {
+    assert!(ScriptBuf::from_hex(
+        "21021aeaf2f8638a129a3156fbe7e5ef635226b0bafd495ff03afe2c843d7e3a4b51ac"
+    )
+    .unwrap()
+    .is_p2pk());
+    assert!(ScriptBuf::from_hex("410496b538e853519c726a2c91e61ec11600ae1390813a627c66fb8be7947be63c52da7589379515d4e0a604f8141781e62294721166bf621e73a82cbf2342c858eeac").unwrap().is_p2pk());
+}
+
+#[test]
+fn p2sh_p2wsh_conversion() {
+    // Test vectors taken from Core tests/data/script_tests.json
+    // bare p2wsh
+    let redeem_script = ScriptBuf::from_hex("410479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8ac").unwrap();
+    let expected_witout =
+        ScriptBuf::from_hex("0020b95237b48faaa69eb078e1170be3b5cbb3fddf16d0a991e14ad274f7b33a4f64")
+            .unwrap();
+    assert!(redeem_script.to_v0_p2wsh().is_v0_p2wsh());
+    assert_eq!(redeem_script.to_v0_p2wsh(), expected_witout);
+
+    // p2sh
+    let redeem_script = ScriptBuf::from_hex("0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8").unwrap();
+    let expected_p2shout =
+        ScriptBuf::from_hex("a91491b24bf9f5288532960ac687abb035127b1d28a587").unwrap();
+    assert!(redeem_script.to_p2sh().is_p2sh());
+    assert_eq!(redeem_script.to_p2sh(), expected_p2shout);
+
+    // p2sh-p2wsh
+    let redeem_script = ScriptBuf::from_hex("410479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8ac").unwrap();
+    let expected_witout =
+        ScriptBuf::from_hex("0020b95237b48faaa69eb078e1170be3b5cbb3fddf16d0a991e14ad274f7b33a4f64")
+            .unwrap();
+    let expected_out =
+        ScriptBuf::from_hex("a914f386c2ba255cc56d20cfa6ea8b062f8b5994551887").unwrap();
+    assert!(redeem_script.to_p2sh().is_p2sh());
+    assert!(redeem_script.to_p2sh().to_v0_p2wsh().is_v0_p2wsh());
+    assert_eq!(redeem_script.to_v0_p2wsh(), expected_witout);
+    assert_eq!(redeem_script.to_v0_p2wsh().to_p2sh(), expected_out);
+}
+
+macro_rules! unwrap_all {
+    ($($var:ident),*) => {
+        $(
+            let $var = $var.unwrap();
+        )*
+    }
+}
+
+#[test]
+fn test_iterator() {
+    let zero = ScriptBuf::from_hex("00").unwrap();
+    let zeropush = ScriptBuf::from_hex("0100").unwrap();
+
+    let nonminimal = ScriptBuf::from_hex("4c0169b2").unwrap(); // PUSHDATA1 for no reason
+    let minimal = ScriptBuf::from_hex("0169b2").unwrap(); // minimal
+    let nonminimal_alt = ScriptBuf::from_hex("026900b2").unwrap(); // non-minimal number but minimal push (should be OK)
+
+    let v_zero: Result<Vec<_>, Error> = zero.instruction_indices_minimal().collect();
+    let v_zeropush: Result<Vec<_>, Error> = zeropush.instruction_indices_minimal().collect();
+
+    let v_min: Result<Vec<_>, Error> = minimal.instruction_indices_minimal().collect();
+    let v_nonmin: Result<Vec<_>, Error> = nonminimal.instruction_indices_minimal().collect();
+    let v_nonmin_alt: Result<Vec<_>, Error> =
+        nonminimal_alt.instruction_indices_minimal().collect();
+    let slop_v_min: Result<Vec<_>, Error> = minimal.instruction_indices().collect();
+    let slop_v_nonmin: Result<Vec<_>, Error> = nonminimal.instruction_indices().collect();
+    let slop_v_nonmin_alt: Result<Vec<_>, Error> = nonminimal_alt.instruction_indices().collect();
+
+    unwrap_all!(
+        v_zero,
+        v_zeropush,
+        v_min,
+        v_nonmin_alt,
+        slop_v_min,
+        slop_v_nonmin,
+        slop_v_nonmin_alt
+    );
+
+    assert_eq!(v_zero, vec![(0, Instruction::PushBytes(PushBytes::empty()))]);
+    assert_eq!(v_zeropush, vec![(0, Instruction::PushBytes([0].as_ref()))]);
+
+    assert_eq!(
+        v_min,
+        vec![(0, Instruction::PushBytes([105].as_ref())), (2, Instruction::Op(opcodes::OP_NOP3))]
+    );
+
+    assert_eq!(v_nonmin.unwrap_err(), Error::NonMinimalPush);
+
+    assert_eq!(
+        v_nonmin_alt,
+        vec![
+            (0, Instruction::PushBytes([105, 0].as_ref())),
+            (3, Instruction::Op(opcodes::OP_NOP3))
+        ]
+    );
+
+    assert_eq!(v_min, slop_v_min);
+    // indices must differ
+    assert_ne!(v_min, slop_v_nonmin);
+    // but the instructions must be equal
+    for ((_, v_min_instr), (_, slop_v_nomin_instr)) in v_min.iter().zip(&slop_v_nonmin) {
+        assert_eq!(v_min_instr, slop_v_nomin_instr);
+    }
+    assert_eq!(v_nonmin_alt, slop_v_nonmin_alt);
+}
+
+#[test]
+fn script_ord() {
+    let script_1 = Builder::new().push_slice([1, 2, 3, 4]).into_script();
+    let script_2 = Builder::new().push_int(10).into_script();
+    let script_3 = Builder::new().push_int(15).into_script();
+    let script_4 = Builder::new().push_opcode(OP_RETURN).into_script();
+
+    assert!(script_1 < script_2);
+    assert!(script_2 < script_3);
+    assert!(script_3 < script_4);
+
+    assert!(script_1 <= script_1);
+    assert!(script_1 >= script_1);
+
+    assert!(script_4 > script_3);
+    assert!(script_3 > script_2);
+    assert!(script_2 > script_1);
+}
+
+#[test]
+#[cfg(feature = "bitcoinconsensus")]
+fn test_bitcoinconsensus() {
+    // a random segwit transaction from the blockchain using native segwit
+    let spent_bytes = hex!("0020701a8d401c84fb13e6baf169d59684e17abd9fa216c8cc5b9fc63d622ff8c58d");
+    let spent = Script::from_bytes(&spent_bytes);
+    let spending = hex!("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");
+    spent.verify(0, crate::Amount::from_sat(18393430), &spending).unwrap();
+}
+
+#[test]
+fn defult_dust_value_tests() {
+    // Check that our dust_value() calculator correctly calculates the dust limit on common
+    // well-known scriptPubKey types.
+    let script_p2wpkh = Builder::new().push_int(0).push_slice([42; 20]).into_script();
+    assert!(script_p2wpkh.is_v0_p2wpkh());
+    assert_eq!(script_p2wpkh.dust_value(), crate::Amount::from_sat(294));
+
+    let script_p2pkh = Builder::new()
+        .push_opcode(OP_DUP)
+        .push_opcode(OP_HASH160)
+        .push_slice([42; 20])
+        .push_opcode(OP_EQUALVERIFY)
+        .push_opcode(OP_CHECKSIG)
+        .into_script();
+    assert!(script_p2pkh.is_p2pkh());
+    assert_eq!(script_p2pkh.dust_value(), crate::Amount::from_sat(546));
+}
+
+#[test]
+#[cfg(feature = "serde")]
+fn test_script_serde_human_and_not() {
+    let script = ScriptBuf::from(vec![0u8, 1u8, 2u8]);
+
+    // Serialize
+    let json = serde_json::to_string(&script).unwrap();
+    assert_eq!(json, "\"000102\"");
+    let bincode = bincode::serialize(&script).unwrap();
+    assert_eq!(bincode, [3, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2]); // bincode adds u64 for length, serde_cbor use varint
+
+    // Deserialize
+    assert_eq!(script, serde_json::from_str::<ScriptBuf>(&json).unwrap());
+    assert_eq!(script, bincode::deserialize::<ScriptBuf>(&bincode).unwrap());
+}
+
+#[test]
+fn test_instructions_are_fused() {
+    let script = ScriptBuf::new();
+    let mut instructions = script.instructions();
+    assert!(instructions.next().is_none());
+    assert!(instructions.next().is_none());
+    assert!(instructions.next().is_none());
+    assert!(instructions.next().is_none());
+}
+
+#[test]
+fn script_extend() {
+    fn cmp_scripts(new_script: &Script, orig_script: &[Instruction<'_>]) {
+        let mut new_instr = new_script.instructions();
+        let mut orig_instr = orig_script.iter().cloned();
+        for (new, orig) in new_instr.by_ref().zip(orig_instr.by_ref()) {
+            assert_eq!(new.unwrap(), orig);
+        }
+        assert!(new_instr.next().is_none() && orig_instr.next().is_none())
+    }
+
+    let script_5_items = [
+        Instruction::Op(OP_DUP),
+        Instruction::Op(OP_HASH160),
+        Instruction::PushBytes([42; 20].as_ref()),
+        Instruction::Op(OP_EQUALVERIFY),
+        Instruction::Op(OP_CHECKSIG),
+    ];
+    let new_script = script_5_items.iter().cloned().collect::<ScriptBuf>();
+    cmp_scripts(&new_script, &script_5_items);
+
+    let script_6_items = [
+        Instruction::Op(OP_DUP),
+        Instruction::Op(OP_HASH160),
+        Instruction::PushBytes([42; 20].as_ref()),
+        Instruction::Op(OP_EQUALVERIFY),
+        Instruction::Op(OP_CHECKSIG),
+        Instruction::Op(OP_NOP),
+    ];
+    let new_script = script_6_items.iter().cloned().collect::<ScriptBuf>();
+    cmp_scripts(&new_script, &script_6_items);
+
+    let script_7_items = [
+        Instruction::Op(OP_DUP),
+        Instruction::Op(OP_HASH160),
+        Instruction::PushBytes([42; 20].as_ref()),
+        Instruction::Op(OP_EQUALVERIFY),
+        Instruction::Op(OP_CHECKSIG),
+        Instruction::Op(OP_NOP),
+    ];
+    let new_script = script_7_items.iter().cloned().collect::<ScriptBuf>();
+    cmp_scripts(&new_script, &script_7_items);
+}
+
+#[test]
+fn read_scriptbool_zero_is_false() {
+    let v: Vec<u8> = vec![0x00, 0x00, 0x00, 0x00];
+    assert!(!read_scriptbool(&v));
+
+    let v: Vec<u8> = vec![0x00, 0x00, 0x00, 0x80]; // With sign bit set.
+    assert!(!read_scriptbool(&v));
+}
+
+#[test]
+fn read_scriptbool_non_zero_is_true() {
+    let v: Vec<u8> = vec![0x01, 0x00, 0x00, 0x00];
+    assert!(read_scriptbool(&v));
+
+    let v: Vec<u8> = vec![0x01, 0x00, 0x00, 0x80]; // With sign bit set.
+    assert!(read_scriptbool(&v));
+}
diff --git a/src/blockdata/transaction/hash_type.rs b/dash/src/blockdata/transaction/hash_type.rs
similarity index 99%
rename from src/blockdata/transaction/hash_type.rs
rename to dash/src/blockdata/transaction/hash_type.rs
index 1fbf7bd05..43e00cb6b 100644
--- a/src/blockdata/transaction/hash_type.rs
+++ b/dash/src/blockdata/transaction/hash_type.rs
@@ -21,7 +21,7 @@
 //!
 
 #[cfg(feature = "std")] use std::error;
-use prelude::*;
+use crate::prelude::*;
 use core::{fmt, str::FromStr};
 
 /// This type is consensus valid but an input including it would prevent the transaction from
@@ -36,7 +36,6 @@ impl fmt::Display for NonStandardSighashType {
 }
 
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 impl error::Error for NonStandardSighashType {}
 
 /// Legacy Hashtype of an input's signature
@@ -45,8 +44,7 @@ pub type SigHashType = EcdsaSighashType;
 
 /// Hashtype of an input's signature, encoded in the last byte of the signature.
 ///
-/// Fixed values so they can be cast as integer types for encoding (see also
-/// [`SchnorrSighashType`]).
+/// Fixed values so they can be cast as integer types for encoding.
 #[derive(PartialEq, Eq, Debug, Copy, Clone)]
 pub enum EcdsaSighashType {
     /// 0x1: Sign all outputs.
@@ -65,7 +63,6 @@ pub enum EcdsaSighashType {
     /// 0x83: Sign one output and only this input (see `Single` for what "one output" means).
     SinglePlusAnyoneCanPay	= 0x83
 }
-serde_string_impl!(EcdsaSighashType, "a EcdsaSighashType data");
 
 impl fmt::Display for EcdsaSighashType {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
@@ -178,23 +175,20 @@ impl fmt::Display for SighashTypeParseError {
     }
 }
 
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 #[cfg(feature = "std")]
 impl ::std::error::Error for SighashTypeParseError {}
 
 #[cfg(test)]
 mod tests {
     use core::str::FromStr;
-    use blockdata::transaction::{hash_type, UINT256_ONE};
-    use ::{EcdsaSighashType, TxIn};
-    use ::{Script, Transaction};
-    use ::{Sighash, TxOut};
-
-    use consensus::encode::deserialize;
-
     use hashes::Hash;
+    use crate::blockdata::transaction::{hash_type, UINT256_ONE};
+    use crate::consensus::encode::deserialize;
+
     use hashes::hex::FromHex;
-    use util::sighash::SighashCache;
+    use crate::sighash::{LegacySighash, SighashCache};
+    use crate::transaction::hash_type::EcdsaSighashType;
+    use crate::{ScriptBuf, Transaction, TxIn, TxOut};
 
     #[test]
     fn test_sighashtype_fromstr_display() {
@@ -241,32 +235,28 @@ mod tests {
     fn sighash_single_bug() {
         const SIGHASH_SINGLE: u32 = 3;
         // We need a tx with more inputs than outputs.
-        let mut input = Vec::new();
-        input.push(TxIn::default());
-        input.push(TxIn::default());
-        let mut output = Vec::new();
-        output.push(TxOut::default());
-
         let tx = Transaction {
             version: 1,
             lock_time: 0,
-            input: input,
-            output: output,   // TODO: Use Vec::from([TxOut]) once we bump MSRV.
-            special_transaction_payload: None
+            input: vec![TxIn::default(), TxIn::default()],
+            output: vec![TxOut::default()],
+            special_transaction_payload: None,
         };
-        let script = Script::new();
-        let got = tx.signature_hash(1, &script, SIGHASH_SINGLE);
-        let want = Sighash::from_slice(&UINT256_ONE).unwrap();
+        let script = ScriptBuf::new();
+        let cache = SighashCache::new(&tx);
+
+        let got = cache.legacy_signature_hash(1, &script, SIGHASH_SINGLE).expect("sighash");
+        let want = LegacySighash::from_slice(&UINT256_ONE).unwrap();
 
         assert_eq!(got, want)
     }
 
     fn run_test_sighash(tx: &str, script: &str, input_index: usize, hash_type: i32, expected_result: &str) {
         let tx: Transaction = deserialize(&Vec::from_hex(tx).unwrap()[..]).unwrap();
-        let script = Script::from(Vec::from_hex(script).unwrap());
+        let script = ScriptBuf::from(Vec::from_hex(script).unwrap());
         let mut raw_expected = Vec::from_hex(expected_result).unwrap();
         raw_expected.reverse();
-        let expected_result = Sighash::from_slice(&raw_expected[..]).unwrap();
+        let expected_result = LegacySighash::from_slice(&raw_expected[..]).unwrap();
 
         let actual_result = if raw_expected[0] % 2 == 0 {
             // tx.signature_hash and cache.legacy_signature_hash are the same, this if helps to test
diff --git a/src/blockdata/transaction/mod.rs b/dash/src/blockdata/transaction/mod.rs
similarity index 61%
rename from src/blockdata/transaction/mod.rs
rename to dash/src/blockdata/transaction/mod.rs
index a9a45fa5e..af6cf7c42 100644
--- a/src/blockdata/transaction/mod.rs
+++ b/dash/src/blockdata/transaction/mod.rs
@@ -32,32 +32,28 @@ pub mod outpoint;
 pub mod hash_type;
 pub mod special_transaction;
 
-use prelude::*;
+use crate::prelude::*;
 
-use ::{io};
+use crate::io;
 use core::{default::Default};
-use core::convert::TryFrom;
 
 use hashes::{Hash, sha256d};
 
-use util::{endian};
-use blockdata::constants::WITNESS_SCALE_FACTOR;
-#[cfg(feature="bitcoinconsensus")] use blockdata::script;
-use blockdata::script::Script;
-use blockdata::transaction::txin::TxIn;
-use blockdata::transaction::txout::TxOut;
-use blockdata::witness::Witness;
-use consensus::{encode, Decodable, Encodable};
-use consensus::encode::MAX_VEC_SIZE;
-use hash_types::{Sighash, Txid, Wtxid};
-use ::{VarInt};
-use blockdata::transaction::hash_type::EcdsaSighashType;
-use blockdata::transaction::special_transaction::{TransactionPayload, TransactionType};
-use InputsHash;
-#[cfg(feature="bitcoinconsensus")] use OutPoint;
-
-#[cfg(doc)]
-use util::sighash::SchnorrSighashType;
+use crate::blockdata::constants::WITNESS_SCALE_FACTOR;
+#[cfg(feature = "bitcoinconsensus")]
+use crate::blockdata::script;
+use crate::{ScriptBuf, Weight};
+use crate::blockdata::script::Script;
+use crate::blockdata::transaction::txin::TxIn;
+use crate::blockdata::transaction::txout::TxOut;
+use crate::blockdata::witness::Witness;
+use crate::consensus::{encode, Decodable, Encodable};
+use crate::consensus::encode::{VarInt};
+use crate::hash_types::{Txid, Wtxid, InputsHash};
+use crate::blockdata::transaction::hash_type::EcdsaSighashType;
+use crate::blockdata::transaction::special_transaction::{TransactionPayload, TransactionType};
+pub use crate::transaction::outpoint::*;
+use crate::sighash::LegacySighash;
 
 /// Used for signature hash for invalid use of SIGHASH_SINGLE.
 const UINT256_ONE: [u8; 32] = [
@@ -67,6 +63,74 @@ const UINT256_ONE: [u8; 32] = [
     0, 0, 0, 0, 0, 0, 0, 0
 ];
 
+/// Result of [`Transaction::encode_signing_data_to`].
+///
+/// This type forces the caller to handle SIGHASH_SINGLE bug case.
+///
+/// This corner case can't be expressed using standard `Result`,
+/// in a way that is both convenient and not-prone to accidental
+/// mistakes (like calling `.expect("writer never fails")`).
+#[must_use]
+pub enum EncodeSigningDataResult<E> {
+    /// Input data is an instance of `SIGHASH_SINGLE` bug
+    SighashSingleBug,
+    /// Operation performed normally.
+    WriteResult(Result<(), E>),
+}
+
+impl<E> EncodeSigningDataResult<E> {
+    /// Checks for SIGHASH_SINGLE bug returning error if the writer failed.
+    ///
+    /// This method is provided for easy and correct handling of the result because
+    /// SIGHASH_SINGLE bug is a special case that must not be ignored nor cause panicking.
+    /// Since the data is usually written directly into a hasher which never fails,
+    /// the recommended pattern to handle this is:
+    ///
+    /// ```rust
+    /// # use dashcore::consensus::deserialize;
+    /// # use dashcore::hashes::{Hash, hex::FromHex};
+    /// # use dashcore::sighash::{LegacySighash, SighashCache};
+    /// # use dashcore::Transaction;
+    /// # let mut writer = LegacySighash::engine();
+    /// # let input_index = 0;
+    /// # let script_pubkey = dashcore::ScriptBuf::new();
+    /// # let sighash_u32 = 0u32;
+    /// # const SOME_TX: &'static str = "0100000001a15d57094aa7a21a28cb20b59aab8fc7d1149a3bdbcddba9c622e4f5f6a99ece010000006c493046022100f93bb0e7d8db7bd46e40132d1f8242026e045f03a0efe71bbb8e3f475e970d790221009337cd7f1f929f00cc6ff01f03729b069a7c21b59b1736ddfee5db5946c5da8c0121033b9b137ee87d5a812d6f506efdd37f0affa7ffc310711c06c7f3e097c9447c52ffffffff0100e1f505000000001976a9140389035a9225b3839e2bbf32d826a1e222031fd888ac00000000";
+    /// # let raw_tx = Vec::from_hex(SOME_TX).unwrap();
+    /// # let tx: Transaction = deserialize(&raw_tx).unwrap();
+    /// let cache = SighashCache::new(&tx);
+    /// if cache.legacy_encode_signing_data_to(&mut writer, input_index, &script_pubkey, sighash_u32)
+    ///         .is_sighash_single_bug()
+    ///         .expect("writer can't fail") {
+    ///     // use a hash value of "1", instead of computing the actual hash due to SIGHASH_SINGLE bug
+    /// }
+    /// ```
+    #[allow(clippy::wrong_self_convention)] // E is not Copy so we consume self.
+    pub fn is_sighash_single_bug(self) -> Result<bool, E> {
+        match self {
+            EncodeSigningDataResult::SighashSingleBug => Ok(true),
+            EncodeSigningDataResult::WriteResult(Ok(())) => Ok(false),
+            EncodeSigningDataResult::WriteResult(Err(e)) => Err(e),
+        }
+    }
+
+    /// Maps a `Result<T, E>` to `Result<T, F>` by applying a function to a
+    /// contained [`Err`] value, leaving an [`Ok`] value untouched.
+    ///
+    /// Like [`Result::map_err`].
+    pub fn map_err<E2, F>(self, f: F) -> EncodeSigningDataResult<E2>
+        where
+            F: FnOnce(E) -> E2,
+    {
+        match self {
+            EncodeSigningDataResult::SighashSingleBug => EncodeSigningDataResult::SighashSingleBug,
+            EncodeSigningDataResult::WriteResult(Err(e)) =>
+                EncodeSigningDataResult::WriteResult(Err(f(e))),
+            EncodeSigningDataResult::WriteResult(Ok(o)) =>
+                EncodeSigningDataResult::WriteResult(Ok(o)),
+        }
+    }
+}
 
 /// A Dash transaction, which describes an authenticated movement of coins.
 ///
@@ -100,6 +164,7 @@ const UINT256_ONE: [u8; 32] = [
 /// for 0-input transactions, which results in unambiguously parseable transactions.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct Transaction {
     /// The protocol version, is currently expected to be 1 or 2 (BIP 68).
     pub version: u16,
@@ -121,9 +186,9 @@ impl Transaction {
         let cloned_tx = Transaction {
             version: self.version,
             lock_time: self.lock_time,
-            input: self.input.iter().map(|txin| TxIn { script_sig: Script::new(), witness: Witness::default(), .. *txin }).collect(),
+            input: self.input.iter().map(|txin| TxIn { script_sig: ScriptBuf::new(), witness: Witness::default(), ..*txin }).collect(),
             output: self.output.clone(),
-            special_transaction_payload: self.special_transaction_payload.clone()
+            special_transaction_payload: self.special_transaction_payload.clone(),
         };
         cloned_tx.txid().into()
     }
@@ -186,72 +251,61 @@ impl Transaction {
     /// # Panics
     ///
     /// If `input_index` is out of bounds (greater than or equal to `self.input.len()`).
+    /// Encodes the signing data from which a signature hash for a given input index with a given
+    /// sighash flag can be computed.
+    ///
+    /// To actually produce a scriptSig, this hash needs to be run through an ECDSA signer, the
+    /// [`EcdsaSighashType`] appended to the resulting sig, and a script written around this, but
+    /// this is the general (and hard) part.
+    ///
+    /// The `sighash_type` supports an arbitrary `u32` value, instead of just [`EcdsaSighashType`],
+    /// because internally 4 bytes are being hashed, even though only the lowest byte is appended to
+    /// signature in a transaction.
+    ///
+    /// # Warning
+    ///
+    /// - Does NOT attempt to support OP_CODESEPARATOR. In general this would require evaluating
+    /// `script_pubkey` to determine which separators get evaluated and which don't, which we don't
+    /// have the information to determine.
+    /// - Does NOT handle the sighash single bug (see "Returns" section)
+    ///
+    /// # Returns
+    ///
+    /// This function can't handle the SIGHASH_SINGLE bug internally, so it returns [`EncodeSigningDataResult`]
+    /// that must be handled by the caller (see [`EncodeSigningDataResult::is_sighash_single_bug`]).
+    ///
+    /// # Panics
+    ///
+    /// If `input_index` is out of bounds (greater than or equal to `self.input.len()`).
+    #[deprecated(
+        since = "0.30.0",
+        note = "Use SighashCache::legacy_encode_signing_data_to instead"
+    )]
     pub fn encode_signing_data_to<Write: io::Write, U: Into<u32>>(
         &self,
-        mut writer: Write,
+        writer: Write,
         input_index: usize,
         script_pubkey: &Script,
         sighash_type: U,
-    ) -> Result<(), encode::Error> {
-        let sighash_type: u32 = sighash_type.into();
-        assert!(input_index < self.input.len());  // Panic on OOB
-
-        if self.is_invalid_use_of_sighash_single(sighash_type, input_index) {
-            // We cannot correctly handle the SIGHASH_SINGLE bug here because usage of this function
-            // will result in the data written to the writer being hashed, however the correct
-            // handling of the SIGHASH_SINGLE bug is to return the 'one array' - either implement
-            // this behaviour manually or use `signature_hash()`.
-            writer.write(b"[not a transaction] SIGHASH_SINGLE bug")?;
-            return Ok(())
-        }
-
-        let (sighash, anyone_can_pay) = EcdsaSighashType::from_consensus(sighash_type).split_anyonecanpay_flag();
-
-        // Build tx to sign
-        let mut tx = Transaction {
-            version: self.version,
-            lock_time: self.lock_time,
-            input: vec![],
-            output: vec![],
-            special_transaction_payload: self.special_transaction_payload.clone()
-        };
-        // Add all inputs necessary..
-        if anyone_can_pay {
-            tx.input = vec![TxIn {
-                previous_output: self.input[input_index].previous_output,
-                script_sig: script_pubkey.clone(),
-                sequence: self.input[input_index].sequence,
-                witness: Witness::default(),
-            }];
-        } else {
-            tx.input = Vec::with_capacity(self.input.len());
-            for (n, input) in self.input.iter().enumerate() {
-                tx.input.push(TxIn {
-                    previous_output: input.previous_output,
-                    script_sig: if n == input_index { script_pubkey.clone() } else { Script::new() },
-                    sequence: if n != input_index && (sighash == EcdsaSighashType::Single || sighash == EcdsaSighashType::None) { 0 } else { input.sequence },
-                    witness: Witness::default(),
-                });
-            }
+    ) -> EncodeSigningDataResult<io::Error> {
+        use EncodeSigningDataResult::*;
+
+        use crate::sighash::{self, SighashCache};
+
+        assert!(input_index < self.input.len()); // Panic on OOB
+
+        let cache = SighashCache::new(self);
+        match cache.legacy_encode_signing_data_to(writer, input_index, script_pubkey, sighash_type)
+        {
+            SighashSingleBug => SighashSingleBug,
+            WriteResult(res) => match res {
+                Ok(()) => WriteResult(Ok(())),
+                Err(e) => match e {
+                    sighash::Error::Io(e) => WriteResult(Err(e.into())),
+                    _ => unreachable!("we check input_index above"),
+                },
+            },
         }
-        // ..then all outputs
-        tx.output = match sighash {
-            EcdsaSighashType::All => self.output.clone(),
-            EcdsaSighashType::Single => {
-                let output_iter = self.output.iter()
-                                      .take(input_index + 1)  // sign all outputs up to and including this one, but erase
-                                      .enumerate()            // all of them except for this one
-                                      .map(|(n, out)| if n == input_index { out.clone() } else { TxOut::default() });
-                output_iter.collect()
-            }
-            EcdsaSighashType::None => vec![],
-            _ => unreachable!()
-        };
-        // hash the result
-        tx.consensus_encode(&mut writer)?;
-        let sighash_arr = endian::u32_to_array_le(sighash_type);
-        sighash_arr.consensus_encode(&mut writer)?;
-        Ok(())
     }
 
     /// Computes a signature hash for a given input index with a given sighash flag.
@@ -281,16 +335,15 @@ impl Transaction {
         &self,
         input_index: usize,
         script_pubkey: &Script,
-        sighash_u32: u32
-    ) -> Sighash {
+        sighash_u32: u32,
+    ) -> LegacySighash {
         if self.is_invalid_use_of_sighash_single(sighash_u32, input_index) {
-            return Sighash::from_slice(&UINT256_ONE).expect("const-size array");
+            return LegacySighash::from_slice(&UINT256_ONE).expect("const-size array");
         }
 
-        let mut engine = Sighash::engine();
-        self.encode_signing_data_to(&mut engine, input_index, script_pubkey, sighash_u32)
-            .expect("engines don't error");
-        Sighash::from_engine(engine)
+        let mut engine = LegacySighash::engine();
+        let _ = self.encode_signing_data_to(&mut engine, input_index, script_pubkey, sighash_u32);
+        LegacySighash::from_engine(engine)
     }
 
     /// This will hash all input outpoints
@@ -326,23 +379,25 @@ impl Transaction {
         ty == EcdsaSighashType::Single && input_index >= self.output.len()
     }
 
-    /// Returns the "weight" of this transaction, as defined by BIP141.
-    #[inline]
-    #[deprecated(since = "0.28.0", note = "Please use `transaction::weight` instead.")]
-    pub fn get_weight(&self) -> usize {
-        self.weight()
-    }
-
     /// Returns the "weight" of this transaction, as defined by BIP141.
     ///
     /// For transactions with an empty witness, this is simply the consensus-serialized size times
     /// four. For transactions with a witness, this is the non-witness consensus-serialized size
     /// multiplied by three plus the with-witness consensus-serialized size.
+    ///
+    /// For transactions with no inputs, this function will return a value 2 less than the actual
+    /// weight of the serialized transaction. The reason is that zero-input transactions, post-segwit,
+    /// cannot be unambiguously serialized; we make a choice that adds two extra bytes. For more
+    /// details see [BIP 141](https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki)
+    /// which uses a "input count" of `0x00` as a `marker` for a Segwit-encoded transaction.
+    ///
+    /// If you need to use 0-input transactions, we strongly recommend you do so using the PSBT
+    /// API. The unsigned transaction encoded within PSBT is always a non-segwit transaction
+    /// and can therefore avoid this ambiguity.
     #[inline]
-    pub fn weight(&self) -> usize {
-        self.scaled_size(WITNESS_SCALE_FACTOR)
+    pub fn weight(&self) -> Weight {
+        Weight::from_wu(self.scaled_size(WITNESS_SCALE_FACTOR) as u64)
     }
-
     /// Returns the regular byte-wise consensus-serialized size of this transaction.
     #[inline]
     #[deprecated(since = "0.28.0", note = "Please use `transaction::size` instead.")]
@@ -371,11 +426,11 @@ impl Transaction {
     /// [`policy`] module.
     ///
     /// [`BIP141`]: https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki
-    /// [`policy`]: ../policy/asset_unlock.html
+    /// [`policy`]: ../policy/mod.rs.html
     #[inline]
     pub fn vsize(&self) -> usize {
-        let weight = self.weight();
-        (weight + WITNESS_SCALE_FACTOR - 1) / WITNESS_SCALE_FACTOR
+        // No overflow because it's computed from data in memory
+        self.weight().to_vbytes_ceil() as usize
     }
 
     /// Returns the size of this transaction excluding the witness data.
@@ -398,15 +453,17 @@ impl Transaction {
                 VarInt(output.script_pubkey.len() as u64).len() +
                 output.script_pubkey.len();
         }
+        let special_tx_len = self.special_transaction_len();
         let non_input_size =
-        // version:
-        4 +
-        // count varints:
-        VarInt(self.input.len() as u64).len() +
-        VarInt(self.output.len() as u64).len() +
-        output_size +
-        // lock_time
-        4;
+            // version:
+            4 +
+                // count varints:
+                VarInt(self.input.len() as u64).len() +
+                VarInt(self.output.len() as u64).len() +
+                output_size +
+                // lock_time
+                4 +
+                special_tx_len;
         non_input_size + input_size
     }
 
@@ -415,7 +472,7 @@ impl Transaction {
         let mut input_weight = 0;
         let mut inputs_with_witnesses = 0;
         for input in &self.input {
-            input_weight += scale_factor*(32 + 4 + 4 + // outpoint (32+4) + nSequence
+            input_weight += scale_factor * (32 + 4 + 4 + // outpoint (32+4) + nSequence
                 VarInt(input.script_sig.len() as u64).len() +
                 input.script_sig.len());
             if !input.witness.is_empty() {
@@ -429,15 +486,17 @@ impl Transaction {
                 VarInt(output.script_pubkey.len() as u64).len() +
                 output.script_pubkey.len();
         }
+        let special_tx_len = self.special_transaction_len();
         let non_input_size =
-        // version:
-        4 +
-        // count varints:
-        VarInt(self.input.len() as u64).len() +
-        VarInt(self.output.len() as u64).len() +
-        output_size +
-        // lock_time
-        4;
+            // version:
+            4 +
+                // count varints:
+                VarInt(self.input.len() as u64).len() +
+                VarInt(self.output.len() as u64).len() +
+                output_size +
+                // lock_time
+                4 +
+                special_tx_len;
         if inputs_with_witnesses == 0 {
             non_input_size * scale_factor + input_weight
         } else {
@@ -445,30 +504,36 @@ impl Transaction {
         }
     }
 
+    /// Returns the length of the special transaction payload, if any.
+    pub fn special_transaction_len(&self) -> usize {
+        match self.special_transaction_payload.as_ref() {
+            Some(payload) => payload.len(),
+            None => return 0,
+        }
+    }
+
     /// Shorthand for [`Self::verify_with_flags`] with flag [`bitcoinconsensus::VERIFY_ALL`].
-    #[cfg(feature="bitcoinconsensus")]
-    #[cfg_attr(docsrs, doc(cfg(feature = "bitcoinconsensus")))]
+    #[cfg(feature = "bitcoinconsensus")]
     pub fn verify<S>(&self, spent: S) -> Result<(), script::Error>
-    where
-        S: FnMut(&OutPoint) -> Option<TxOut>
+        where
+            S: FnMut(&OutPoint) -> Option<TxOut>
     {
         self.verify_with_flags(spent, ::bitcoinconsensus::VERIFY_ALL)
     }
 
     /// Verify that this transaction is able to spend its inputs.
     /// The `spent` closure should not return the same [`TxOut`] twice!
-    #[cfg(feature="bitcoinconsensus")]
-    #[cfg_attr(docsrs, doc(cfg(feature = "bitcoinconsensus")))]
+    #[cfg(feature = "bitcoinconsensus")]
     pub fn verify_with_flags<S, F>(&self, mut spent: S, flags: F) -> Result<(), script::Error>
-    where
-        S: FnMut(&OutPoint) -> Option<TxOut>,
-        F: Into<u32>
+        where
+            S: FnMut(&OutPoint) -> Option<TxOut>,
+            F: Into<u32>
     {
         let tx = encode::serialize(&*self);
         let flags: u32 = flags.into();
         for (idx, input) in self.input.iter().enumerate() {
             if let Some(output) = spent(&input.previous_output) {
-                output.script_pubkey.verify_with_flags(idx, ::Amount::from_sat(output.value), tx.as_slice(), flags)?;
+                output.script_pubkey.verify_with_flags(idx, crate::Amount::from_sat(output.value), tx.as_slice(), flags)?;
             } else {
                 return Err(script::Error::UnknownSpentOutput(input.previous_output.clone()));
             }
@@ -492,7 +557,7 @@ impl Transaction {
     /// accepts hash of the public key to prove ownership of the burnt
     /// dash on Dash Platform.
     pub fn add_burn_output(&mut self, satoshis_to_burn: u64, data: &[u8; 20]) {
-        let burn_script = Script::new_op_return(data);
+        let burn_script = ScriptBuf::new_op_return(data);
         let output = TxOut {
             value: satoshis_to_burn,
             script_pubkey: burn_script,
@@ -507,19 +572,35 @@ impl Transaction {
             let hash = self.txid();
 
             let (one, two) = result.split_at_mut(32);
-            one.copy_from_slice(hash.as_inner());
+            one.copy_from_slice(hash.as_raw_hash().as_byte_array().as_slice());
             let output_index_bytes: [u8; 4] = (output_index as u32).to_le_bytes();
             two.copy_from_slice(&output_index_bytes);
             result
         })
     }
+
+    /// Computes the weight and checks that it matches the output of `predict_weight`.
+    #[cfg(test)]
+    fn check_weight(&self) -> Weight {
+        let weight1 = self.weight();
+        let inputs = self.input.iter().map(|txin| {
+            InputWeightPrediction::new(
+                txin.script_sig.len(),
+                txin.witness.iter().map(|elem| elem.len()),
+            )
+        });
+        let outputs = self.output.iter().map(|txout| txout.script_pubkey.len());
+        let weight2 = predict_weight(inputs, outputs);
+        assert_eq!(weight1, weight2);
+        weight1
+    }
 }
 
 impl Encodable for Transaction {
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
         let mut len = 0;
-        len += self.version.consensus_encode(&mut s)?;
-        len += (self.tx_type() as u16).consensus_encode(&mut s)?;
+        len += self.version.consensus_encode(w)?;
+        len += (self.tx_type() as u16).consensus_encode(w)?;
         // To avoid serialization ambiguity, no inputs means we use BIP141 serialization (see
         // `Transaction` docs for full explanation).
         let mut have_witness = self.input.is_empty();
@@ -530,45 +611,44 @@ impl Encodable for Transaction {
             }
         }
         if !have_witness {
-            len += self.input.consensus_encode(&mut s)?;
-            len += self.output.consensus_encode(&mut s)?;
+            len += self.input.consensus_encode(w)?;
+            len += self.output.consensus_encode(w)?;
         } else {
-            len += 0u8.consensus_encode(&mut s)?;
-            len += 1u8.consensus_encode(&mut s)?;
-            len += self.input.consensus_encode(&mut s)?;
-            len += self.output.consensus_encode(&mut s)?;
+            len += 0u8.consensus_encode(w)?;
+            len += 1u8.consensus_encode(w)?;
+            len += self.input.consensus_encode(w)?;
+            len += self.output.consensus_encode(w)?;
             for input in &self.input {
-                len += input.witness.consensus_encode(&mut s)?;
+                len += input.witness.consensus_encode(w)?;
             }
         }
-        len += self.lock_time.consensus_encode(&mut s)?;
+        len += self.lock_time.consensus_encode(w)?;
         if let Some(payload) = &self.special_transaction_payload {
             let mut buf = Vec::new();
             payload.consensus_encode(&mut buf)?;
             // this is so we get the size of the payload
-            len += buf.consensus_encode(&mut s)?;
+            len += buf.consensus_encode(w)?;
         }
         Ok(len)
     }
 }
 
 impl Decodable for Transaction {
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Self, encode::Error> {
-        let mut d = d.take(MAX_VEC_SIZE as u64);
-        let version = u16::consensus_decode(&mut d)?;
-        let special_transaction_type_u16 = u16::consensus_decode(&mut d)?;
+    fn consensus_decode_from_finite_reader<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let version = u16::consensus_decode_from_finite_reader(r)?;
+        let special_transaction_type_u16 = u16::consensus_decode(r)?;
         let special_transaction_type = TransactionType::try_from(special_transaction_type_u16).map_err(|_| encode::Error::UnknownSpecialTransactionType(special_transaction_type_u16))?;
-        let input = Vec::<TxIn>::consensus_decode(&mut d)?;
+        let input = Vec::<TxIn>::consensus_decode_from_finite_reader(r)?;
         // segwit
         if input.is_empty() {
-            let segwit_flag = u8::consensus_decode(&mut d)?;
+            let segwit_flag = u8::consensus_decode_from_finite_reader(r)?;
             match segwit_flag {
                 // BIP144 input witnesses
                 1 => {
-                    let mut input = Vec::<TxIn>::consensus_decode(&mut d)?;
-                    let output = Vec::<TxOut>::consensus_decode(&mut d)?;
+                    let mut input = Vec::<TxIn>::consensus_decode_from_finite_reader(r)?;
+                    let output = Vec::<TxOut>::consensus_decode_from_finite_reader(r)?;
                     for txin in input.iter_mut() {
-                        txin.witness = Decodable::consensus_decode(&mut d)?;
+                        txin.witness = Decodable::consensus_decode_from_finite_reader(r)?;
                     }
                     if !input.is_empty() && input.iter().all(|input| input.witness.is_empty()) {
                         Err(encode::Error::ParseFailed("witness flag set but no witnesses present"))
@@ -577,45 +657,252 @@ impl Decodable for Transaction {
                             version,
                             input,
                             output,
-                            lock_time: Decodable::consensus_decode(&mut d)?,
-                            special_transaction_payload: special_transaction_type.consensus_decode(d)?
+                            lock_time: Decodable::consensus_decode_from_finite_reader(r)?,
+                            special_transaction_payload: special_transaction_type.consensus_decode(r)?,
                         })
                     }
                 }
                 // We don't support anything else
                 x => Err(encode::Error::UnsupportedSegwitFlag(x)),
             }
-        // non-segwit
+            // non-segwit
         } else {
             Ok(Transaction {
                 version,
                 input,
-                output: Decodable::consensus_decode(&mut d)?,
-                lock_time: Decodable::consensus_decode(&mut d)?,
-                special_transaction_payload: special_transaction_type.consensus_decode(d)?
+                output: Decodable::consensus_decode_from_finite_reader(r)?,
+                lock_time: Decodable::consensus_decode_from_finite_reader(r)?,
+                special_transaction_payload: special_transaction_type.consensus_decode(r)?,
             })
         }
     }
 }
 
+/// Weight prediction of an individual input.
+///
+/// This helper type collects information about an input to be used in [`predict_weight`] function.
+/// It can only be created using the [`new`](InputWeightPrediction::new) function.
+#[derive(Copy, Clone, Debug)]
+pub struct InputWeightPrediction {
+    script_size: usize,
+    witness_size: usize,
+}
+
+impl InputWeightPrediction {
+    /// Input weight prediction corresponding to spending of P2WPKH output with the largest possible
+    /// DER-encoded signature.
+    ///
+    /// If the input in your transaction uses P2WPKH you can use this instead of
+    /// [`InputWeightPrediction::new`].
+    ///
+    /// This is useful when you **do not** use [signature grinding] and want to ensure you are not
+    /// under-paying. See [`ground_p2wpkh`](Self::ground_p2wpkh) if you do use signature grinding.
+    ///
+    /// [signature grinding]: https://bitcoin.stackexchange.com/questions/111660/what-is-signature-grinding
+    pub const P2WPKH_MAX: Self =
+        InputWeightPrediction { script_size: 0, witness_size: 1 + 1 + 73 + 1 + 33 };
+
+    /// Input weight prediction corresponding to spending of taproot output using the key and
+    /// default sighash.
+    ///
+    /// If the input in your transaction uses Taproot key spend you can use this instead of
+    /// [`InputWeightPrediction::new`].
+    pub const P2TR_KEY_DEFAULT_SIGHASH: Self =
+        InputWeightPrediction { script_size: 0, witness_size: 1 + 1 + 64 };
+
+    /// Input weight prediction corresponding to spending of taproot output using the key and
+    /// **non**-default sighash.
+    ///
+    /// If the input in your transaction uses Taproot key spend you can use this instead of
+    /// [`InputWeightPrediction::new`].
+    pub const P2TR_KEY_NON_DEFAULT_SIGHASH: Self =
+        InputWeightPrediction { script_size: 0, witness_size: 1 + 1 + 65 };
+
+    /// Input weight prediction corresponding to spending of P2WPKH output using [signature
+    /// grinding].
+    ///
+    /// If the input in your transaction uses P2WPKH and you use signature grinding you can use this
+    /// instead of [`InputWeightPrediction::new`]. See [`P2WPKH_MAX`](Self::P2WPKH_MAX) if you don't
+    /// use signature grinding.
+    ///
+    /// Note: `bytes_to_grind` is usually `1` because of exponential cost of higher values.
+    ///
+    /// # Panics
+    ///
+    /// The funcion panics in const context and debug builds if `bytes_to_grind` is higher than 62.
+    ///
+    /// [signature grinding]: https://bitcoin.stackexchange.com/questions/111660/what-is-signature-grinding
+    pub const fn ground_p2wpkh(bytes_to_grind: usize) -> Self {
+        // Written to trigger const/debug panic for unreasonably high values.
+        let der_signature_size = 10 + (62 - bytes_to_grind);
+        let witness_size = 1 // length of element count varint
+            + 1 // length of element size varint (max signature length is 73B)
+            + der_signature_size
+            + 1 // sighash flag
+            + 1 // length of element size varint
+            + 33; // length of (always-compressed) public key
+        InputWeightPrediction { script_size: 0, witness_size }
+    }
+
+    /// Computes the prediction for a single input.
+    pub fn new<T>(input_script_len: usize, witness_element_lengths: T) -> Self
+        where
+            T: IntoIterator,
+            T::Item: Borrow<usize>,
+    {
+        let (count, total_size) =
+            witness_element_lengths.into_iter().fold((0, 0), |(count, total_size), elem_len| {
+                let elem_len = *elem_len.borrow();
+                let elem_size = elem_len + VarInt(elem_len as u64).len();
+                (count + 1, total_size + elem_size)
+            });
+        let witness_size = if count > 0 { total_size + VarInt(count as u64).len() } else { 0 };
+        let script_size = input_script_len + VarInt(input_script_len as u64).len();
+
+        InputWeightPrediction { script_size, witness_size }
+    }
+
+    /// Computes the prediction for a single input in `const` context.
+    ///
+    /// *Important: only available in Rust 1.46+*
+    ///
+    /// This is a `const` version of [`new`](Self::new) which only allows slices due to current Rust
+    /// limitations around `const fn`. Because of these limitations it may be less efficient than
+    /// `new` and thus is intended to be only used in `const` context.
+    pub const fn from_slice(input_script_len: usize, witness_element_lengths: &[usize]) -> Self {
+        let mut i = 0;
+        let mut total_size = 0;
+        // for loops not supported in const fn
+        while i < witness_element_lengths.len() {
+            let elem_len = witness_element_lengths[i];
+            let elem_size = elem_len + VarInt(elem_len as u64).len();
+            total_size += elem_size;
+            i += 1;
+        }
+        let witness_size = if !witness_element_lengths.is_empty() {
+            total_size + VarInt(witness_element_lengths.len() as u64).len()
+        } else {
+            0
+        };
+        let script_size = input_script_len + VarInt(input_script_len as u64).len();
+
+        InputWeightPrediction { script_size, witness_size }
+    }
+}
+
+/// Predicts the weight of a to-be-constructed transaction.
+///
+/// This function computes the weight of a transaction which is not fully known. All that is needed
+/// is the lengths of scripts and witness elements.
+///
+/// # Arguments
+///
+/// * `inputs` - an iterator which returns `InputWeightPrediction` for each input of the
+///   to-be-constructed transaction.
+/// * `output_script_lens` - an iterator which returns the length of `script_pubkey` of each output
+///   of the to-be-constructed transaction.
+///
+/// Note that lengths of the scripts and witness elements must be non-serialized, IOW *without* the
+/// preceding compact size. The lenght of preceding compact size is computed and added inside the
+/// function for convenience.
+///
+/// # Usage
+///
+/// When signing a transaction one doesn't know the signature before knowing the transaction fee and
+/// the transaction fee is not known before knowing the transaction size which is not known before
+/// knowing the signature. This apparent dependency cycle can be broken by knowing the length of the
+/// signature without knowing the contents of the signature e.g., we know all Schnorr signatures
+/// are 64 bytes long.
+///
+/// Additionally, some protocols may require calculating the amounts before knowing various parts
+/// of the transaction (assuming their length is known).
+///
+/// # Notes on integer overflow
+///
+/// Overflows are intentionally not checked because one of the following holds:
+///
+/// * The transaction is valid (obeys the block size limit) and the code feeds correct values to
+///   this function - no overflow can happen.
+/// * The transaction will be so large it doesn't fit in the memory - overflow will happen but
+///   then the transaction will fail to construct and even if one serialized it on disk directly
+///   it'd be invalid anyway so overflow doesn't matter.
+/// * The values fed into this function are inconsistent with the actual lengths the transaction
+///   will have - the code is already broken and checking overflows doesn't help. Unfortunately
+///   this probably cannot be avoided.
+pub fn predict_weight<I, O>(inputs: I, output_script_lens: O) -> Weight
+    where
+        I: IntoIterator<Item = InputWeightPrediction>,
+        O: IntoIterator<Item = usize>,
+{
+    let (input_count, partial_input_weight, inputs_with_witnesses) = inputs.into_iter().fold(
+        (0, 0, 0),
+        |(count, partial_input_weight, inputs_with_witnesses), prediction| {
+            (
+                count + 1,
+                partial_input_weight + prediction.script_size * 4 + prediction.witness_size,
+                inputs_with_witnesses + (prediction.witness_size > 0) as usize,
+            )
+        },
+    );
+    let (output_count, output_scripts_size) = output_script_lens.into_iter().fold(
+        (0, 0),
+        |(output_count, total_scripts_size), script_len| {
+            let script_size = script_len + VarInt(script_len as u64).len();
+            (output_count + 1, total_scripts_size + script_size)
+        },
+    );
+    predict_weight_internal(
+        input_count,
+        partial_input_weight,
+        inputs_with_witnesses,
+        output_count,
+        output_scripts_size,
+    )
+}
+
+const fn predict_weight_internal(
+    input_count: usize,
+    partial_input_weight: usize,
+    inputs_with_witnesses: usize,
+    output_count: usize,
+    output_scripts_size: usize,
+) -> Weight {
+    let input_weight = partial_input_weight + input_count * 4 * (32 + 4 + 4);
+    let output_size = 8 * output_count + output_scripts_size;
+    let non_input_size =
+        // version:
+        4 +
+            // count varints:
+            VarInt(input_count as u64).len() +
+            VarInt(output_count as u64).len() +
+            output_size +
+            // lock_time
+            4;
+    let weight = if inputs_with_witnesses == 0 {
+        non_input_size * 4 + input_weight
+    } else {
+        non_input_size * 4 + input_weight + input_count - inputs_with_witnesses + 2
+    };
+    Weight::from_wu(weight as u64)
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
 
-    use blockdata::constants::WITNESS_SCALE_FACTOR;
-    use blockdata::script::Script;
-    use consensus::encode::serialize;
-    use consensus::encode::deserialize;
-
+    use crate::blockdata::constants::WITNESS_SCALE_FACTOR;
+    use crate::consensus::encode::serialize;
+    use crate::consensus::encode::deserialize;
     use hashes::hex::FromHex;
+    use crate::internal_macros::hex;
 
     #[test]
-    fn test_is_coinbase () {
-        use network::constants::Network;
-        use blockdata::constants;
+    fn test_is_coinbase() {
+        use crate::network::constants::Network;
+        use crate::blockdata::constants;
 
         let genesis = constants::genesis_block(Network::Dash);
-        assert! (genesis.txdata[0].is_coin_base());
+        assert!(genesis.txdata[0].is_coin_base());
         let tx_bytes = Vec::from_hex("0100000001a15d57094aa7a21a28cb20b59aab8fc7d1149a3bdbcddba9c622e4f5f6a99ece010000006c493046022100f93bb0e7d8db7bd46e40132d1f8242026e045f03a0efe71bbb8e3f475e970d790221009337cd7f1f929f00cc6ff01f03729b069a7c21b59b1736ddfee5db5946c5da8c0121033b9b137ee87d5a812d6f506efdd37f0affa7ffc310711c06c7f3e097c9447c52ffffffff0100e1f505000000001976a9140389035a9225b3839e2bbf32d826a1e222031fd888ac00000000").unwrap();
         let tx: Transaction = deserialize(&tx_bytes).unwrap();
         assert!(!tx.is_coin_base());
@@ -623,7 +910,7 @@ mod tests {
 
     #[test]
     fn test_nonsegwit_transaction() {
-        let tx_bytes = Vec::from_hex("0100000001a15d57094aa7a21a28cb20b59aab8fc7d1149a3bdbcddba9c622e4f5f6a99ece010000006c493046022100f93bb0e7d8db7bd46e40132d1f8242026e045f03a0efe71bbb8e3f475e970d790221009337cd7f1f929f00cc6ff01f03729b069a7c21b59b1736ddfee5db5946c5da8c0121033b9b137ee87d5a812d6f506efdd37f0affa7ffc310711c06c7f3e097c9447c52ffffffff0100e1f505000000001976a9140389035a9225b3839e2bbf32d826a1e222031fd888ac00000000").unwrap();
+        let tx_bytes = hex!("0100000001a15d57094aa7a21a28cb20b59aab8fc7d1149a3bdbcddba9c622e4f5f6a99ece010000006c493046022100f93bb0e7d8db7bd46e40132d1f8242026e045f03a0efe71bbb8e3f475e970d790221009337cd7f1f929f00cc6ff01f03729b069a7c21b59b1736ddfee5db5946c5da8c0121033b9b137ee87d5a812d6f506efdd37f0affa7ffc310711c06c7f3e097c9447c52ffffffff0100e1f505000000001976a9140389035a9225b3839e2bbf32d826a1e222031fd888ac00000000");
         let tx: Result<Transaction, _> = deserialize(&tx_bytes);
         assert!(tx.is_ok());
         let realtx = tx.unwrap();
@@ -631,19 +918,25 @@ mod tests {
         // will also fail. But these will show you where the failure is so I'll leave them in.
         assert_eq!(realtx.version, 1);
         assert_eq!(realtx.input.len(), 1);
-        // In particular this one is easy to get backward -- in bitcoin hashes are encoded
+        // In particular this one is easy to get backward -- in dash hashes are encoded
         // as little-endian 256-bit numbers rather than as data strings.
-        assert_eq!(format!("{:x}", realtx.input[0].previous_output.txid),
-                   "ce9ea9f6f5e422c6a9dbcddb3b9a14d1c78fab9ab520cb281aa2a74a09575da1".to_string());
+        assert_eq!(
+            format!("{:x}", realtx.input[0].previous_output.txid),
+            "ce9ea9f6f5e422c6a9dbcddb3b9a14d1c78fab9ab520cb281aa2a74a09575da1".to_string()
+        );
         assert_eq!(realtx.input[0].previous_output.vout, 1);
         assert_eq!(realtx.output.len(), 1);
         assert_eq!(realtx.lock_time, 0);
 
-        assert_eq!(format!("{:x}", realtx.txid()),
-                   "a6eab3c14ab5272a58a5ba91505ba1a4b6d7a3a9fcbd187b6cd99a7b6d548cb7".to_string());
-        assert_eq!(format!("{:x}", realtx.wtxid()),
-                   "a6eab3c14ab5272a58a5ba91505ba1a4b6d7a3a9fcbd187b6cd99a7b6d548cb7".to_string());
-        assert_eq!(realtx.weight(), tx_bytes.len()*WITNESS_SCALE_FACTOR);
+        assert_eq!(
+            format!("{:x}", realtx.txid()),
+            "a6eab3c14ab5272a58a5ba91505ba1a4b6d7a3a9fcbd187b6cd99a7b6d548cb7".to_string()
+        );
+        assert_eq!(
+            format!("{:x}", realtx.wtxid()),
+            "a6eab3c14ab5272a58a5ba91505ba1a4b6d7a3a9fcbd187b6cd99a7b6d548cb7".to_string()
+        );
+        assert_eq!(realtx.check_weight().to_wu() as usize, tx_bytes.len() * WITNESS_SCALE_FACTOR);
         assert_eq!(realtx.size(), tx_bytes.len());
         assert_eq!(realtx.vsize(), tx_bytes.len());
         assert_eq!(realtx.strippedsize(), tx_bytes.len());
@@ -651,13 +944,13 @@ mod tests {
 
     #[test]
     fn test_segwit_transaction() {
-        let tx_bytes = Vec::from_hex(
+        let tx_bytes = hex!(
             "02000000000101595895ea20179de87052b4046dfe6fd515860505d6511a9004cf12a1f93cac7c01000000\
             00ffffffff01deb807000000000017a9140f3444e271620c736808aa7b33e370bd87cb5a078702483045022\
             100fb60dad8df4af2841adc0346638c16d0b8035f5e3f3753b88db122e70c79f9370220756e6633b17fd271\
             0e626347d28d60b0a2d6cbb41de51740644b9fb3ba7751040121028fa937ca8cba2197a37c007176ed89410\
             55d3bcb8627d085e94553e62f057dcc00000000"
-        ).unwrap();
+        );
         let tx: Result<Transaction, _> = deserialize(&tx_bytes);
         assert!(tx.is_ok());
         let realtx = tx.unwrap();
@@ -665,20 +958,26 @@ mod tests {
         // will also fail. But these will show you where the failure is so I'll leave them in.
         assert_eq!(realtx.version, 2);
         assert_eq!(realtx.input.len(), 1);
-        // In particular this one is easy to get backward -- in bitcoin hashes are encoded
+        // In particular this one is easy to get backward -- in dash hashes are encoded
         // as little-endian 256-bit numbers rather than as data strings.
-        assert_eq!(format!("{:x}", realtx.input[0].previous_output.txid),
-                   "7cac3cf9a112cf04901a51d605058615d56ffe6d04b45270e89d1720ea955859".to_string());
+        assert_eq!(
+            format!("{:x}", realtx.input[0].previous_output.txid),
+            "7cac3cf9a112cf04901a51d605058615d56ffe6d04b45270e89d1720ea955859".to_string()
+        );
         assert_eq!(realtx.input[0].previous_output.vout, 1);
         assert_eq!(realtx.output.len(), 1);
         assert_eq!(realtx.lock_time, 0);
 
-        assert_eq!(format!("{:x}", realtx.txid()),
-                   "f5864806e3565c34d1b41e716f72609d00b55ea5eac5b924c9719a842ef42206".to_string());
-        assert_eq!(format!("{:x}", realtx.wtxid()),
-                   "80b7d8a82d5d5bf92905b06f2014dd699e03837ca172e3a59d51426ebbe3e7f5".to_string());
-        const EXPECTED_WEIGHT: usize = 442;
-        assert_eq!(realtx.weight(), EXPECTED_WEIGHT);
+        assert_eq!(
+            format!("{:x}", realtx.txid()),
+            "f5864806e3565c34d1b41e716f72609d00b55ea5eac5b924c9719a842ef42206".to_string()
+        );
+        assert_eq!(
+            format!("{:x}", realtx.wtxid()),
+            "80b7d8a82d5d5bf92905b06f2014dd699e03837ca172e3a59d51426ebbe3e7f5".to_string()
+        );
+        const EXPECTED_WEIGHT: Weight = Weight::from_wu(442);
+        assert_eq!(realtx.check_weight(), EXPECTED_WEIGHT);
         assert_eq!(realtx.size(), tx_bytes.len());
         assert_eq!(realtx.vsize(), 111);
         // Since
@@ -686,12 +985,16 @@ mod tests {
         //     weight = WITNESS_SCALE_FACTOR * stripped_size + witness_size
         // then,
         //     stripped_size = (weight - size) / (WITNESS_SCALE_FACTOR - 1)
-        let expected_strippedsize = (EXPECTED_WEIGHT - tx_bytes.len()) / (WITNESS_SCALE_FACTOR - 1);
+        let expected_strippedsize =
+            (EXPECTED_WEIGHT.to_wu() as usize - tx_bytes.len()) / (WITNESS_SCALE_FACTOR - 1);
         assert_eq!(realtx.strippedsize(), expected_strippedsize);
         // Construct a transaction without the witness data.
-        let mut tx_without_witness = realtx.clone();
+        let mut tx_without_witness = realtx;
         tx_without_witness.input.iter_mut().for_each(|input| input.witness.clear());
-        assert_eq!(tx_without_witness.weight(), expected_strippedsize*WITNESS_SCALE_FACTOR);
+        assert_eq!(
+            tx_without_witness.check_weight().to_wu() as usize,
+            expected_strippedsize * WITNESS_SCALE_FACTOR
+        );
         assert_eq!(tx_without_witness.size(), expected_strippedsize);
         assert_eq!(tx_without_witness.vsize(), expected_strippedsize);
         assert_eq!(tx_without_witness.strippedsize(), expected_strippedsize);
@@ -734,17 +1037,17 @@ mod tests {
         let old_ntxid = tx.ntxid();
         assert_eq!(format!("{:x}", old_ntxid), "c3573dbea28ce24425c59a189391937e00d255150fa973d59d61caf3a06b601d");
         // changing sigs does not affect it
-        tx.input[0].script_sig = Script::new();
+        tx.input[0].script_sig = ScriptBuf::new();
         assert_eq!(old_ntxid, tx.ntxid());
         // changing pks does
-        tx.output[0].script_pubkey = Script::new();
+        tx.output[0].script_pubkey = ScriptBuf::new();
         assert!(old_ntxid != tx.ntxid());
     }
 
     #[test]
     fn test_txid() {
         // segwit tx from Liquid integration tests, txid/hash from Core decoderawtransaction
-        let tx_bytes = Vec::from_hex(
+        let tx_bytes = hex!(
             "01000000000102ff34f95a672bb6a4f6ff4a7e90fa8c7b3be7e70ffc39bc99be3bda67942e836c00000000\
              23220020cde476664d3fa347b8d54ef3aee33dcb686a65ced2b5207cbf4ec5eda6b9b46e4f414d4c934ad8\
              1d330314e888888e3bd22c7dde8aac2ca9227b30d7c40093248af7812201000000232200200af6f6a071a6\
@@ -773,26 +1076,38 @@ mod tests {
              ab0281d17cfca1cc035966d335f474932d5e6c5422210355fbb768ce3ce39360277345dbb5f376e706459e\
              5a2b5e0e09a535e61690647021023222ceec58b94bd25925dd9743dae6b928737491bd940fc5dd7c6f5d5f\
              2adc1e53ae00000000"
-        ).unwrap();
+        );
         let tx: Transaction = deserialize(&tx_bytes).unwrap();
 
-        assert_eq!(format!("{:x}", tx.wtxid()), "d6ac4a5e61657c4c604dcde855a1db74ec6b3e54f32695d72c5e11c7761ea1b4");
-        assert_eq!(format!("{:x}", tx.txid()), "9652aa62b0e748caeec40c4cb7bc17c6792435cc3dfe447dd1ca24f912a1c6ec");
-        assert_eq!(tx.weight(), 2718);
+        assert_eq!(
+            format!("{:x}", tx.wtxid()),
+            "d6ac4a5e61657c4c604dcde855a1db74ec6b3e54f32695d72c5e11c7761ea1b4"
+        );
+        assert_eq!(
+            format!("{:x}", tx.txid()),
+            "9652aa62b0e748caeec40c4cb7bc17c6792435cc3dfe447dd1ca24f912a1c6ec"
+        );
+        assert_eq!(tx.check_weight(), Weight::from_wu(2718));
 
         // non-segwit tx from my mempool
-        let tx_bytes = Vec::from_hex(
+        let tx_bytes = hex!(
             "01000000010c7196428403d8b0c88fcb3ee8d64f56f55c8973c9ab7dd106bb4f3527f5888d000000006a47\
              30440220503a696f55f2c00eee2ac5e65b17767cd88ed04866b5637d3c1d5d996a70656d02202c9aff698f\
              343abb6d176704beda63fcdec503133ea4f6a5216b7f925fa9910c0121024d89b5a13d6521388969209df2\
              7a8469bd565aff10e8d42cef931fad5121bfb8ffffffff02b825b404000000001976a914ef79e7ee9fff98\
              bcfd08473d2b76b02a48f8c69088ac0000000000000000296a273236303039343836393731373233313237\
              3633313032313332353630353838373931323132373000000000"
-        ).unwrap();
+        );
         let tx: Transaction = deserialize(&tx_bytes).unwrap();
 
-        assert_eq!(format!("{:x}", tx.wtxid()), "971ed48a62c143bbd9c87f4bafa2ef213cfa106c6e140f111931d0be307468dd");
-        assert_eq!(format!("{:x}", tx.txid()), "971ed48a62c143bbd9c87f4bafa2ef213cfa106c6e140f111931d0be307468dd");
+        assert_eq!(
+            format!("{:x}", tx.wtxid()),
+            "971ed48a62c143bbd9c87f4bafa2ef213cfa106c6e140f111931d0be307468dd"
+        );
+        assert_eq!(
+            format!("{:x}", tx.txid()),
+            "971ed48a62c143bbd9c87f4bafa2ef213cfa106c6e140f111931d0be307468dd"
+        );
     }
 
     #[test]
@@ -810,7 +1125,7 @@ mod tests {
     fn test_segwit_tx_decode() {
         let tx_bytes = Vec::from_hex("010000000001010000000000000000000000000000000000000000000000000000000000000000ffffffff3603da1b0e00045503bd5704c7dd8a0d0ced13bb5785010800000000000a636b706f6f6c122f4e696e6a61506f6f6c2f5345475749542fffffffff02b4e5a212000000001976a914876fbb82ec05caa6af7a3b5e5a983aae6c6cc6d688ac0000000000000000266a24aa21a9edf91c46b49eb8a29089980f02ee6b57e7d63d33b18b4fddac2bcd7db2a39837040120000000000000000000000000000000000000000000000000000000000000000000000000").unwrap();
         let tx: Transaction = deserialize(&tx_bytes).unwrap();
-        assert_eq!(tx.weight(), 780);
+        assert_eq!(tx.weight(), Weight::from_wu(780));
         serde_round_trip!(tx);
 
         let consensus_encoded = serialize(&tx);
@@ -818,12 +1133,12 @@ mod tests {
     }
 
     #[test]
-    #[cfg(feature="bitcoinconsensus")]
-    fn test_transaction_verify () {
+    #[cfg(feature = "bitcoinconsensus")]
+    fn test_transaction_verify() {
         use hashes::hex::FromHex;
         use std::collections::HashMap;
-        use blockdata::script;
-        use blockdata::witness::Witness;
+        use crate::blockdata::script;
+        use crate::blockdata::witness::Witness;
 
         // a random recent segwit transaction from blockchain using both old and segwit inputs
         let mut spending: Transaction = deserialize(Vec::from_hex("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")
@@ -864,14 +1179,14 @@ mod tests {
         // test that we get a failure if we corrupt a signature
         let mut witness: Vec<_> = spending.input[1].witness.to_vec();
         witness[0][10] = 42;
-        spending.input[1].witness = Witness::from_vec(witness);
+        spending.input[1].witness = Witness::from_slice(witness.as_slice());
         match spending.verify(|point: &OutPoint| {
             if let Some(tx) = spent3.remove(&point.txid) {
                 return tx.output.get(point.vout as usize).cloned();
             }
             None
         }).err().unwrap() {
-            script::Error::BitcoinConsensus(_) => {},
+            script::Error::BitcoinConsensus(_) => {}
             _ => panic!("Wrong error type"),
         }
     }
@@ -883,7 +1198,7 @@ mod tests {
             lock_time: 0,
             input: vec![],
             output: vec![],
-            special_transaction_payload: None
+            special_transaction_payload: None,
         };
 
         let pk_data = Vec::from_hex("b8e2d839dd21088b78bebfea3e3e632181197982").unwrap();
diff --git a/dash/src/blockdata/transaction/outpoint.rs b/dash/src/blockdata/transaction/outpoint.rs
new file mode 100644
index 000000000..043b5615d
--- /dev/null
+++ b/dash/src/blockdata/transaction/outpoint.rs
@@ -0,0 +1,328 @@
+// Rust Dash Library
+// Originally written in 2014 by
+//     Andrew Poelstra <apoelstra@wpsoftware.net>
+//     For Bitcoin
+// Refactored for Dash in 2022 by
+//     The Dash Core Developers
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Dash Outpoints.
+//!
+//! An outpoint is a reference to one of the indexed destinations of a transaction.
+//!
+
+use hashes::{self, Hash};
+
+#[cfg(feature = "std")]
+use std::error;
+use core::fmt;
+use crate::io;
+use crate::consensus::{Decodable, Encodable, encode};
+use crate::hash_types::Txid;
+
+/// A reference to a transaction output.
+#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
+pub struct OutPoint {
+    /// The referenced transaction's txid.
+    pub txid: Txid,
+    /// The index of the referenced output in its transaction's vout.
+    pub vout: u32,
+}
+#[cfg(feature = "serde")]
+crate::serde_utils::serde_struct_human_string_impl!(OutPoint, "an OutPoint", txid, vout);
+
+impl OutPoint {
+    /// Creates a new [`OutPoint`].
+    #[inline]
+    pub fn new(txid: Txid, vout: u32) -> OutPoint {
+        OutPoint { txid, vout }
+    }
+
+    /// Creates a "null" `OutPoint`.
+    ///
+    /// This value is used for coinbase transactions because they don't have any previous outputs.
+    #[inline]
+    pub fn null() -> OutPoint {
+        OutPoint {
+            txid: Hash::all_zeros(),
+            vout: u32::MAX,
+        }
+    }
+
+    /// Checks if an `OutPoint` is "null".
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// use dashcore::blockdata::constants::genesis_block;
+    /// use dashcore::network::constants::Network;
+    ///
+    /// let block = genesis_block(Network::Dash);
+    /// let tx = &block.txdata[0];
+    ///
+    /// // Coinbase transactions don't have any previous output.
+    /// assert!(tx.input[0].previous_output.is_null());
+    /// ```
+    #[inline]
+    pub fn is_null(&self) -> bool {
+        *self == OutPoint::null()
+    }
+}
+
+impl Default for OutPoint {
+    fn default() -> Self {
+        OutPoint::null()
+    }
+}
+
+impl fmt::Display for OutPoint {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}:{}", self.txid, self.vout)
+    }
+}
+
+impl Encodable for OutPoint {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let len = self.txid.consensus_encode(w)?;
+        Ok(len + self.vout.consensus_encode(w)?)
+    }
+}
+
+impl Decodable for OutPoint {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        Ok(OutPoint {
+            txid: Decodable::consensus_decode(r)?,
+            vout: Decodable::consensus_decode(r)?,
+        })
+    }
+}
+
+/// An error in parsing an OutPoint.
+#[derive(Clone, PartialEq, Eq, Debug)]
+#[non_exhaustive]
+pub enum ParseOutPointError {
+    /// Error in TXID part.
+    Txid(hashes::hex::Error),
+    /// Error in vout part.
+    Vout(crate::error::ParseIntError),
+    /// Error in general format.
+    Format,
+    /// Size exceeds max.
+    TooLong,
+    /// Vout part is not strictly numeric without leading zeroes.
+    VoutNotCanonical,
+}
+
+impl core::str::FromStr for OutPoint {
+    type Err = ParseOutPointError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        if s.len() > 75 {
+            // 64 + 1 + 10
+            return Err(ParseOutPointError::TooLong);
+        }
+        let find = s.find(':');
+        if find.is_none() || find != s.rfind(':') {
+            return Err(ParseOutPointError::Format);
+        }
+        let colon = find.unwrap();
+        if colon == 0 || colon == s.len() - 1 {
+            return Err(ParseOutPointError::Format);
+        }
+        Ok(OutPoint {
+            txid: s[..colon].parse().map_err(ParseOutPointError::Txid)?,
+            vout: parse_vout(&s[colon + 1..])?,
+        })
+    }
+}
+
+impl fmt::Display for ParseOutPointError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            ParseOutPointError::Txid(ref e) => write!(f, "error parsing TXID: {}", e),
+            ParseOutPointError::Vout(ref e) => write!(f, "error parsing vout: {}", e),
+            ParseOutPointError::Format => write!(f, "OutPoint not in <txid>:<vout> format"),
+            ParseOutPointError::TooLong => write!(f, "vout should be at most 10 digits"),
+            ParseOutPointError::VoutNotCanonical => write!(f, "no leading zeroes or + allowed in vout part"),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl error::Error for ParseOutPointError {
+    fn cause(&self) -> Option<&dyn error::Error> {
+        match *self {
+            ParseOutPointError::Txid(ref e) => Some(e),
+            ParseOutPointError::Vout(ref e) => Some(e),
+            _ => None,
+        }
+    }
+}
+
+/// Parses a string-encoded transaction index (vout).
+/// Does not permit leading zeroes or non-digit characters.
+fn parse_vout(s: &str) -> Result<u32, ParseOutPointError> {
+    if s.len() > 1 {
+        let first = s.chars().next().unwrap();
+        if first == '0' || first == '+' {
+            return Err(ParseOutPointError::VoutNotCanonical);
+        }
+    }
+    crate::parse::int(s).map_err(ParseOutPointError::Vout)
+}
+
+#[cfg(test)]
+mod tests {
+    use core::str::FromStr;
+    use crate::internal_macros::hex;
+    use crate::Transaction;
+    use super::*;
+
+    #[test]
+    fn test_outpoint() {
+        assert_eq!(OutPoint::from_str("i don't care"), Err(ParseOutPointError::Format));
+        assert_eq!(
+            OutPoint::from_str(
+                "5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:1:1"
+            ),
+            Err(ParseOutPointError::Format)
+        );
+        assert_eq!(
+            OutPoint::from_str("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:"),
+            Err(ParseOutPointError::Format)
+        );
+        assert_eq!(
+            OutPoint::from_str(
+                "5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:11111111111"
+            ),
+            Err(ParseOutPointError::TooLong)
+        );
+        assert_eq!(
+            OutPoint::from_str(
+                "5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:01"
+            ),
+            Err(ParseOutPointError::VoutNotCanonical)
+        );
+        assert_eq!(
+            OutPoint::from_str(
+                "5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:+42"
+            ),
+            Err(ParseOutPointError::VoutNotCanonical)
+        );
+        assert_eq!(
+            OutPoint::from_str("i don't care:1"),
+            Err(ParseOutPointError::Txid("i don't care".parse::<Txid>().unwrap_err()))
+        );
+        assert_eq!(
+            OutPoint::from_str(
+                "5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c945X:1"
+            ),
+            Err(ParseOutPointError::Txid(
+                "5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c945X"
+                    .parse::<Txid>()
+                    .unwrap_err()
+            ))
+        );
+        assert_eq!(
+            OutPoint::from_str(
+                "5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:lol"
+            ),
+            Err(ParseOutPointError::Vout(crate::parse::int::<u32, _>("lol").unwrap_err()))
+        );
+
+        assert_eq!(
+            OutPoint::from_str(
+                "5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:42"
+            ),
+            Ok(OutPoint {
+                txid: "5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456"
+                    .parse()
+                    .unwrap(),
+                vout: 42,
+            })
+        );
+        assert_eq!(
+            OutPoint::from_str(
+                "5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:0"
+            ),
+            Ok(OutPoint {
+                txid: "5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456"
+                    .parse()
+                    .unwrap(),
+                vout: 0,
+            })
+        );
+    }
+
+    #[test]
+    fn out_point_buffer() {
+        let mut tx = Transaction {
+            version: 0,
+            lock_time: 0,
+            input: vec![],
+            output: vec![],
+            special_transaction_payload: None,
+        };
+
+        let pk_data = hex!("b8e2d839dd21088b78bebfea3e3e632181197982");
+
+        let mut pk_array: [u8; 20] = [0; 20];
+        for (index, kek) in pk_array.iter_mut().enumerate() {
+            *kek = *pk_data.get(index).unwrap();
+        }
+
+        tx.add_burn_output(10000, &pk_array);
+
+        let mut expected_buf = tx.txid().as_byte_array().to_vec();
+        let mut expected_index = vec![0, 0, 0, 0];
+        // 0 serialized as 32 bits
+        expected_buf.append(&mut expected_index);
+
+        let out_point_buffer = tx.out_point_buffer(0).unwrap();
+
+        assert_eq!(out_point_buffer.to_vec(), expected_buf);
+
+        assert!(tx.out_point_buffer(1).is_none());
+    }
+
+    // #[test]
+    // fn out_point_parse() {
+    //     let mut tx = Transaction {
+    //         version: 0,
+    //         lock_time: 0,
+    //         input: vec![],
+    //         output: vec![],
+    //         special_transaction_payload: None,
+    //     };
+    //
+    //     let pk_data = hex!("b8e2d839dd21088b78bebfea3e3e632181197982");
+    //
+    //     let mut pk_array: [u8; 20] = [0; 20];
+    //     for (index, kek) in pk_array.iter_mut().enumerate() {
+    //         *kek = *pk_data.get(index).unwrap();
+    //     }
+    //
+    //     tx.add_burn_output(10000, &pk_array);
+    //
+    //     let mut expected_buf = tx.txid().as_byte_array().to_vec();
+    //     let mut expected_index = vec![0, 0, 0, 0];
+    //     // 0 serialized as 32 bits
+    //     expected_buf.append(&mut expected_index);
+    //
+    //     let out_point_buffer = tx.out_point_buffer(0).unwrap();
+    //
+    //     let out_point = OutPoint::from(out_point_buffer);
+    //
+    //     assert_eq!(out_point.vout, 0);
+    //     assert_eq!(out_point.txid, tx.txid());
+    // }
+}
\ No newline at end of file
diff --git a/dash/src/blockdata/transaction/special_transaction/asset_lock.rs b/dash/src/blockdata/transaction/special_transaction/asset_lock.rs
new file mode 100644
index 000000000..cfe777dd7
--- /dev/null
+++ b/dash/src/blockdata/transaction/special_transaction/asset_lock.rs
@@ -0,0 +1,97 @@
+// Rust Dash Library
+// Written for Dash in 2022 by
+//     The Dash Core Developers
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Dash Asset Lock Special Transaction.
+//!
+//! The asset lock special transaction is used to add to the asset lock credit pool.
+//!
+//!
+//! It is defined in DIPX [dip-000X.md](https://github.com/dashpay/dips/blob/master/dip-000X.md) as follows:
+//!
+//!
+//! The special transaction type used for AssetLockTx Transactions is 8.
+
+use crate::prelude::*;
+use crate::{io, VarInt};
+use crate::consensus::{Decodable, Encodable, encode};
+use crate::transaction::txout::TxOut;
+
+/// An Asset Lock payload. This is contained as the payload of an asset lock special transaction.
+/// The Asset Lock Special transaction and this payload is described in the Asset Lock DIP2X
+/// (todo:update this).
+/// An Asset Lock can fund multiple Identity registrations or top ups.
+/// The Asset Lock payload credit outputs field contains a vector of TxOuts.
+/// Each TxOut refers to a funding of an Identity.
+///
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct AssetLockPayload {
+    version: u8,
+    credit_outputs: Vec<TxOut>,
+}
+
+impl AssetLockPayload {
+    /// The size of the payload in bytes.
+    pub fn size(&self) -> usize {
+        let size = 1 + VarInt(self.credit_outputs.len() as u64).len();
+        size + self.credit_outputs.iter().map(|tx| tx.size()).sum::<usize>()
+    }
+}
+
+impl Encodable for AssetLockPayload {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let mut len = 0;
+        len += self.version.consensus_encode(w)?;
+        len += self.credit_outputs.consensus_encode(w)?;
+        Ok(len)
+    }
+}
+
+impl Decodable for AssetLockPayload {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let version = u8::consensus_decode(r)?;
+        let credit_outputs = Vec::<TxOut>::consensus_decode(r)?;
+        Ok(AssetLockPayload {
+            version,
+            credit_outputs,
+        })
+    }
+}
+
+mod tests {
+    use crate::consensus::Encodable;
+    use crate::{ScriptBuf, TxOut};
+    use crate::transaction::special_transaction::asset_lock::AssetLockPayload;
+
+    #[test]
+    fn size() {
+        let want = 41;
+        let tx1 = TxOut {
+            value: 10,
+            script_pubkey: ScriptBuf(vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 0]),
+        };
+        let tx2 = TxOut {
+            value: 11,
+            script_pubkey: ScriptBuf(vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1]),
+        };
+        let payload = AssetLockPayload {
+            version: 1,
+            credit_outputs: vec![tx1, tx2],
+        };
+        assert_eq!(payload.size(), want);
+        let actual = payload.consensus_encode(&mut Vec::new()).unwrap();
+        assert_eq!(actual, want);
+    }
+}
diff --git a/src/blockdata/transaction/special_transaction/asset_unlock/mod.rs b/dash/src/blockdata/transaction/special_transaction/asset_unlock/mod.rs
similarity index 88%
rename from src/blockdata/transaction/special_transaction/asset_unlock/mod.rs
rename to dash/src/blockdata/transaction/special_transaction/asset_unlock/mod.rs
index bd8c7dac7..f8e71ae22 100644
--- a/src/blockdata/transaction/special_transaction/asset_unlock/mod.rs
+++ b/dash/src/blockdata/transaction/special_transaction/asset_unlock/mod.rs
@@ -17,7 +17,7 @@
 //! The credit withdrawal special transaction is used to withdraw from the asset lock credit pool.
 //!
 //!
-//! It is defined in DIPX https://github.com/dashpay/dips/blob/master/dip-000X.md as follows:
+//! It is defined in DIPX [dip-000X.md](https://github.com/dashpay/dips/blob/master/dip-000X.md) as follows:
 //!
 //!
 //! The special transaction type used for CrWithTx Transactions is 9.
diff --git a/src/blockdata/transaction/special_transaction/asset_unlock/qualified_asset_unlock.rs b/dash/src/blockdata/transaction/special_transaction/asset_unlock/qualified_asset_unlock.rs
similarity index 53%
rename from src/blockdata/transaction/special_transaction/asset_unlock/qualified_asset_unlock.rs
rename to dash/src/blockdata/transaction/special_transaction/asset_unlock/qualified_asset_unlock.rs
index a6a6fc051..dc97d68ed 100644
--- a/src/blockdata/transaction/special_transaction/asset_unlock/qualified_asset_unlock.rs
+++ b/dash/src/blockdata/transaction/special_transaction/asset_unlock/qualified_asset_unlock.rs
@@ -17,19 +17,21 @@
 //! The credit withdrawal special transaction is used to withdraw from the asset lock credit pool.
 //!
 //!
-//! It is defined in DIPX https://github.com/dashpay/dips/blob/master/dip-000X.md as follows:
+//! It is defined in DIPX [dip-000X.md](https://github.com/dashpay/dips/blob/master/dip-000X.md) as follows:
 //!
 //!
 //! The special transaction type used for CrWithTx Transactions is 9.
 
-use ::{io, SpecialTransactionPayloadHash};
-use io::{Error, Write};
+use crate::io;
+use crate::hash_types::{SpecialTransactionPayloadHash};
 use hashes::Hash;
-use bls_sig_utils::BLSSignature;
-use consensus::{Decodable, Encodable, encode};
-use blockdata::transaction::special_transaction::asset_unlock::request_info::AssetUnlockRequestInfo;
-use blockdata::transaction::special_transaction::asset_unlock::unqualified_asset_unlock::AssetUnlockBasePayload;
-use blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
+use crate::bls_sig_utils::BLSSignature;
+use crate::consensus::{Decodable, Encodable, encode};
+use crate::blockdata::transaction::special_transaction::{
+    asset_unlock::request_info::AssetUnlockRequestInfo,
+    asset_unlock::unqualified_asset_unlock::AssetUnlockBasePayload,
+    SpecialTransactionBasePayloadEncodable,
+};
 
 /// A Credit Withdrawal payload. This is contained as the payload of a credit withdrawal special
 /// transaction.
@@ -41,6 +43,7 @@ use blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEn
 ///
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct AssetUnlockPayload {
     /// The base information about the asset unlock. This base information is the information that
     /// should be put into a queue.
@@ -52,8 +55,15 @@ pub struct AssetUnlockPayload {
     pub quorum_sig: BLSSignature,
 }
 
+impl AssetUnlockPayload {
+    /// The size of the payload in bytes.
+    pub fn size(&self) -> usize {
+        self.base.size() + self.request_info.size() + 96
+    }
+}
+
 impl SpecialTransactionBasePayloadEncodable for AssetUnlockPayload {
-    fn base_payload_data_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn base_payload_data_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
         let mut len = 0;
         len += self.base.consensus_encode(&mut s)?;
         len += self.request_info.consensus_encode(&mut s)?;
@@ -68,24 +78,50 @@ impl SpecialTransactionBasePayloadEncodable for AssetUnlockPayload {
 }
 
 impl Encodable for AssetUnlockPayload {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
         let mut len = 0;
-        len += self.base.consensus_encode(&mut s)?;
-        len += self.request_info.consensus_encode(&mut s)?;
-        len += self.quorum_sig.consensus_encode(&mut s)?;
+        len += self.base.consensus_encode(w)?;
+        len += self.request_info.consensus_encode(w)?;
+        len += self.quorum_sig.consensus_encode(w)?;
         Ok(len)
     }
 }
 
 impl Decodable for AssetUnlockPayload {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let base = AssetUnlockBasePayload::consensus_decode(&mut d)?;
-        let request_info = AssetUnlockRequestInfo::consensus_decode(&mut d)?;
-        let quorum_sig = BLSSignature::consensus_decode(&mut d)?;
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let base = AssetUnlockBasePayload::consensus_decode(r)?;
+        let request_info = AssetUnlockRequestInfo::consensus_decode(r)?;
+        let quorum_sig = BLSSignature::consensus_decode(r)?;
         Ok(AssetUnlockPayload {
             base,
             request_info,
-            quorum_sig
+            quorum_sig,
         })
     }
-}
\ No newline at end of file
+}
+
+mod tests {
+    use hashes::Hash;
+    use crate::bls_sig_utils::BLSSignature;
+    use crate::consensus::Encodable;
+    use crate::hash_types::QuorumHash;
+    use crate::transaction::special_transaction::asset_unlock::qualified_asset_unlock::AssetUnlockPayload;
+    use crate::transaction::special_transaction::asset_unlock::request_info::AssetUnlockRequestInfo;
+    use crate::transaction::special_transaction::asset_unlock::unqualified_asset_unlock::AssetUnlockBasePayload;
+
+    #[test]
+    fn size() {
+        let want = 145;
+        let payload = AssetUnlockPayload {
+            base: AssetUnlockBasePayload { version: 0, index: 0, fee: 0 },
+            request_info: AssetUnlockRequestInfo {
+                request_height: 0,
+                quorum_hash: QuorumHash::all_zeros(),
+            },
+            quorum_sig: BLSSignature::from([0; 96]),
+        };
+        let actual = payload.consensus_encode(&mut Vec::new()).unwrap();
+        assert_eq!(payload.size(), want);
+        assert_eq!(actual, want);
+    }
+}
diff --git a/src/blockdata/transaction/special_transaction/asset_unlock/request_info.rs b/dash/src/blockdata/transaction/special_transaction/asset_unlock/request_info.rs
similarity index 54%
rename from src/blockdata/transaction/special_transaction/asset_unlock/request_info.rs
rename to dash/src/blockdata/transaction/special_transaction/asset_unlock/request_info.rs
index 92f51a9a4..0894eda63 100644
--- a/src/blockdata/transaction/special_transaction/asset_unlock/request_info.rs
+++ b/dash/src/blockdata/transaction/special_transaction/asset_unlock/request_info.rs
@@ -18,17 +18,17 @@
 //!
 //! The request info should be added once the quorum selection for signing has been made.
 
-use ::{io};
-use io::{Error, Write};
-use consensus::{Decodable, Encodable, encode};
-use ::{QuorumHash};
-use prelude::*;
+use crate::io;
+use crate::consensus::{Decodable, Encodable, encode};
+use crate::hash_types::{QuorumHash};
+use crate::prelude::*;
 
 /// An asset unlock request info
 /// This is the information about the signing quorum
 /// The request height should be the height at which the specified quorum is active on core.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct AssetUnlockRequestInfo {
     /// The core request height of the transaction. This should match a period where the quorum_hash
     /// is still active
@@ -38,31 +38,55 @@ pub struct AssetUnlockRequestInfo {
 }
 
 impl AssetUnlockRequestInfo {
+
+    /// The size of the payload in bytes.
+    pub fn size(&self) -> usize { 4 + 32 }
+
     /// Encodes the asset unlock on top of
-    pub fn consensus_append_to_base_encode<S: Write>(&self, base_bytes: Vec<u8>, mut s: S) -> Result<usize, Error> {
-        let mut len = 0;
-        len += base_bytes.consensus_encode(&mut s)?;
+    pub fn consensus_append_to_base_encode<S: io::Write>(&self, base_bytes: Vec<u8>, mut s: S) -> Result<usize, io::Error> {
+        s.write(base_bytes.as_slice())?;
+        let mut len = base_bytes.len();
         len += self.consensus_encode(&mut s)?;
         Ok(len)
     }
 }
 
 impl Encodable for AssetUnlockRequestInfo {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
         let mut len = 0;
-        len += self.request_height.consensus_encode(&mut s)?;
-        len += self.quorum_hash.consensus_encode(&mut s)?;
+        len += self.request_height.consensus_encode(w)?;
+        len += self.quorum_hash.consensus_encode(w)?;
         Ok(len)
     }
 }
 
 impl Decodable for AssetUnlockRequestInfo {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let request_height = u32::consensus_decode(&mut d)?;
-        let quorum_hash = QuorumHash::consensus_decode(&mut d)?;
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let request_height = u32::consensus_decode(r)?;
+        let quorum_hash = QuorumHash::consensus_decode(r)?;
         Ok(AssetUnlockRequestInfo {
             request_height,
             quorum_hash,
         })
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use hashes::Hash;
+    use crate::consensus::Encodable;
+    use crate::hash_types::QuorumHash;
+    use crate::transaction::special_transaction::asset_unlock::request_info::AssetUnlockRequestInfo;
+
+    #[test]
+    fn size() {
+        let want = 36;
+        let payload = AssetUnlockRequestInfo {
+            request_height: 0,
+            quorum_hash: QuorumHash::all_zeros(),
+        };
+        let actual = payload.consensus_encode(&mut Vec::new()).unwrap();
+        assert_eq!(payload.size(), want);
+        assert_eq!(actual, want);
+    }
+}
diff --git a/src/blockdata/transaction/special_transaction/asset_unlock/unqualified_asset_unlock.rs b/dash/src/blockdata/transaction/special_transaction/asset_unlock/unqualified_asset_unlock.rs
similarity index 53%
rename from src/blockdata/transaction/special_transaction/asset_unlock/unqualified_asset_unlock.rs
rename to dash/src/blockdata/transaction/special_transaction/asset_unlock/unqualified_asset_unlock.rs
index 76eaff28b..6f472a78a 100644
--- a/src/blockdata/transaction/special_transaction/asset_unlock/unqualified_asset_unlock.rs
+++ b/dash/src/blockdata/transaction/special_transaction/asset_unlock/unqualified_asset_unlock.rs
@@ -17,26 +17,25 @@
 //! These base elements are used in withdrawal queues.
 //!
 //!
-//! It is defined in DIPX https://github.com/dashpay/dips/blob/master/dip-000X.md as follows:
+//! It is defined in DIPX [dip-000X.md](https://github.com/dashpay/dips/blob/master/dip-000X.md) as follows:
 //!
 //!
 //! The special transaction type used for AssetUnlockTx Transactions is 9.
 
-use io::{Error, Write};
-use core::convert::TryFrom;
-use ::{io, TxOut};
-use blockdata::transaction::special_transaction::TransactionType;
-use blockdata::transaction::special_transaction::TransactionType::AssetUnlock;
-use consensus::{Decodable, Encodable, encode};
-use consensus::encode::MAX_VEC_SIZE;
-use ::{Script, TxIn};
-use prelude::*;
-use ::{PubkeyHash, ScriptHash};
+use crate::{io, VarInt};
+use crate::transaction::TxOut;
+use crate::blockdata::transaction::special_transaction::TransactionType;
+use crate::blockdata::transaction::special_transaction::TransactionType::AssetUnlock;
+use crate::consensus::{Decodable, Encodable, encode};
+use crate::{ScriptBuf, TxIn};
+use crate::prelude::*;
+use crate::hash_types::{PubkeyHash, ScriptHash};
 
 /// An Asset Unlock Base payload. This is the base payload of the Asset Unlock. In order to make
 /// it a full payload the request info should be added.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct AssetUnlockBasePayload {
     /// The payload protocol version, is currently expected to be 0.
     pub version: u8,
@@ -46,21 +45,26 @@ pub struct AssetUnlockBasePayload {
     pub fee: u32,
 }
 
+impl AssetUnlockBasePayload {
+    /// The size of the payload in bytes.
+    pub fn size(&self) -> usize { 1 + 8 + 4 }
+}
+
 impl Encodable for AssetUnlockBasePayload {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
         let mut len = 0;
-        len += self.version.consensus_encode(&mut s)?;
-        len += self.index.consensus_encode(&mut s)?;
-        len += self.fee.consensus_encode(&mut s)?;
+        len += self.version.consensus_encode(w)?;
+        len += self.index.consensus_encode(w)?;
+        len += self.fee.consensus_encode(w)?;
         Ok(len)
     }
 }
 
 impl Decodable for AssetUnlockBasePayload {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let version = u8::consensus_decode(&mut d)?;
-        let index = u64::consensus_decode(&mut d)?;
-        let fee = u32::consensus_decode(&mut d)?;
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let version = u8::consensus_decode(r)?;
+        let index = u64::consensus_decode(r)?;
+        let fee = u32::consensus_decode(r)?;
         Ok(AssetUnlockBasePayload {
             version,
             index,
@@ -73,6 +77,7 @@ impl Decodable for AssetUnlockBasePayload {
 /// to be kept in withdrawal queues.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct AssetUnlockBaseTransactionInfo {
     /// The protocol version, is currently expected to be 1 or 2 (BIP 68).
     pub version: u16,
@@ -89,7 +94,7 @@ impl AssetUnlockBaseTransactionInfo {
     /// accepts hash of the public key to prove ownership of the burnt
     /// dash on Dash Platform.
     pub fn add_burn_output(&mut self, satoshis_to_burn: u64, data: &[u8; 20]) {
-        let burn_script = Script::new_op_return(data);
+        let burn_script = ScriptBuf::new_op_return(data);
         let output = TxOut {
             value: satoshis_to_burn,
             script_pubkey: burn_script,
@@ -99,7 +104,7 @@ impl AssetUnlockBaseTransactionInfo {
 
     /// Convenience method that adds an output that pays to a public key hash.
     pub fn add_p2pkh_output(&mut self, amount: u64, public_key_hash: &PubkeyHash) {
-        let public_key_hash_script = Script::new_p2pkh(public_key_hash);
+        let public_key_hash_script = ScriptBuf::new_p2pkh(public_key_hash);
         let output = TxOut {
             value: amount,
             script_pubkey: public_key_hash_script,
@@ -109,45 +114,80 @@ impl AssetUnlockBaseTransactionInfo {
 
     /// Convenience method that adds an output that pays to a public key hash.
     pub fn add_p2sh_output(&mut self, amount: u64, script_hash: &ScriptHash) {
-        let pay_to_script_hash_script = Script::new_p2sh(script_hash);
+        let pay_to_script_hash_script = ScriptBuf::new_p2sh(script_hash);
         let output = TxOut {
             value: amount,
             script_pubkey: pay_to_script_hash_script,
         };
         self.output.push(output)
     }
+
+    /// The size of the transaction in bytes.
+    pub fn size(&self) -> usize {
+        let mut size = 2 + 2 + 1 + 4;
+        size += self.output.iter().map(|o| o.size()).sum::<usize>();
+        size += VarInt(self.output.len() as u64).len();
+        size + self.base_payload.size()
+    }
 }
 
 impl Encodable for AssetUnlockBaseTransactionInfo {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
         let mut len = 0;
-        len += self.version.consensus_encode(&mut s)?;
-        len += (AssetUnlock as u16).consensus_encode(&mut s)?;
-        len += Vec::<TxIn>::new().consensus_encode(&mut s)?;
-        len += self.output.consensus_encode(&mut s)?;
-        len += self.lock_time.consensus_encode(&mut s)?;
-        len += self.base_payload.consensus_encode(&mut s)?;
+        len += self.version.consensus_encode(w)?;
+        len += (AssetUnlock as u16).consensus_encode(w)?;
+        len += Vec::<TxIn>::new().consensus_encode(w)?;
+        len += self.output.consensus_encode(w)?;
+        len += self.lock_time.consensus_encode(w)?;
+        len += self.base_payload.consensus_encode(w)?;
         Ok(len)
     }
 }
 
 impl Decodable for AssetUnlockBaseTransactionInfo {
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Self, encode::Error> {
-        let mut d = d.take(MAX_VEC_SIZE as u64);
-        let version = u16::consensus_decode(&mut d)?;
-        let special_transaction_type_u16 = u16::consensus_decode(&mut d)?;
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let version = u16::consensus_decode(r)?;
+        let special_transaction_type_u16 = u16::consensus_decode(r)?;
         let special_transaction_type = TransactionType::try_from(special_transaction_type_u16).map_err(|_| encode::Error::UnknownSpecialTransactionType(special_transaction_type_u16))?;
         if special_transaction_type != AssetUnlock {
-            return Err(encode::Error::WrongSpecialTransactionPayloadConversion{ expected: AssetUnlock, actual: special_transaction_type})
+            return Err(encode::Error::WrongSpecialTransactionPayloadConversion { expected: AssetUnlock, actual: special_transaction_type });
         }
-        Vec::<TxIn>::consensus_decode(&mut d)?; //no inputs
+        Vec::<TxIn>::consensus_decode(r)?; //no inputs
         Ok(AssetUnlockBaseTransactionInfo {
             version,
-            output: Decodable::consensus_decode(&mut d)?,
-            lock_time: Decodable::consensus_decode(&mut d)?,
-            base_payload: AssetUnlockBasePayload::consensus_decode(d)?
+            output: Decodable::consensus_decode(r)?,
+            lock_time: Decodable::consensus_decode(r)?,
+            base_payload: AssetUnlockBasePayload::consensus_decode(r)?,
         })
     }
 }
 
+#[cfg(test)]
+mod tests {
+    use hashes::Hash;
+    use crate::consensus::Encodable;
+    use crate::transaction::special_transaction::asset_unlock::unqualified_asset_unlock::{AssetUnlockBasePayload, AssetUnlockBaseTransactionInfo};
+    use crate::{ScriptBuf, TxOut};
 
+    #[test]
+    fn size() {
+        let want = 51;
+        let tx1 = TxOut {
+            value: 0,
+            script_pubkey: ScriptBuf::from(vec![1, 2, 3, 4, 5]),
+        };
+        let tx2 = TxOut {
+            value: 0,
+            script_pubkey: ScriptBuf::from(vec![6, 7, 8, 9, 0]),
+        };
+        let payload = AssetUnlockBaseTransactionInfo {
+            version: 0,
+            lock_time: 0,
+            output: vec![tx1, tx2],
+            base_payload: AssetUnlockBasePayload { version: 0, index: 0, fee: 0 },
+        };
+        assert_eq!(payload.size(), want);
+        let actual = payload.consensus_encode(&mut Vec::new()).unwrap();
+        assert_eq!(actual, want);
+    }
+}
diff --git a/dash/src/blockdata/transaction/special_transaction/coinbase.rs b/dash/src/blockdata/transaction/special_transaction/coinbase.rs
new file mode 100644
index 000000000..fcea45c74
--- /dev/null
+++ b/dash/src/blockdata/transaction/special_transaction/coinbase.rs
@@ -0,0 +1,137 @@
+// Rust Dash Library
+// Written for Dash in 2022 by
+//     The Dash Core Developers
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Dash Coinbase Special Transaction.
+//!
+//! Each time a block is mined it includes a coinbase special transaction.
+//! It is defined in DIP4 [dip-0004](https://github.com/dashpay/dips/blob/master/dip-0004.md).
+//!
+
+use crate::prelude::Vec;
+
+use crate::{io, VarInt};
+use crate::io::{Error, ErrorKind};
+use crate::hash_types::{MerkleRootMasternodeList, MerkleRootQuorums};
+use crate::consensus::{Decodable, Encodable, encode};
+
+/// A Coinbase payload. This is contained as the payload of a coinbase special transaction.
+/// The Coinbase payload is described in DIP4.
+///
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct CoinbasePayload {
+    version: u16,
+    height: u32,
+    merkle_root_masternode_list: MerkleRootMasternodeList,
+    merkle_root_quorums: MerkleRootQuorums,
+    best_cl_height: Option<u32>,
+    best_cl_signature: Option<Vec<u8>>,
+    asset_locked_amount: Option<u64>,
+}
+
+impl CoinbasePayload {
+    /// The size of the payload in bytes.
+    /// version(2) + height(4) + merkle_root_masternode_list(32) + merkle_root_quorums(32)
+    /// in addition to the above, if version >= 3: asset_locked_amount(8) + best_cl_height(4) +
+    /// best_cl_signature(VarInt(len) + len)
+    pub fn size(&self) -> usize {
+        let mut size: usize = 2 + 4 + 32 + 32;
+        if self.version >= 3 {
+            size += 4 + 8;
+            if let Some(sig) = &self.best_cl_signature {
+                size += VarInt(sig.len() as u64).len() + sig.len()
+            }
+        }
+        size
+    }
+}
+
+impl Encodable for CoinbasePayload {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let mut len = 0;
+        len += self.version.consensus_encode(w)?;
+        len += self.height.consensus_encode(w)?;
+        len += self.merkle_root_masternode_list.consensus_encode(w)?;
+        len += self.merkle_root_quorums.consensus_encode(w)?;
+        if self.version >= 3 {
+            if let Some(best_cl_height) = self.best_cl_height {
+                len += best_cl_height.consensus_encode(w)?;
+            } else {
+                return Err(Error::new(ErrorKind::InvalidInput, "best_cl_height is not set"));
+            }
+
+            if let Some(ref best_cl_signature) = self.best_cl_signature {
+                len += best_cl_signature.consensus_encode(w)?;
+            } else {
+                return Err(Error::new(ErrorKind::InvalidInput, "best_cl_signature is not set"));
+            }
+
+            if let Some(asset_locked_amount) = self.asset_locked_amount {
+                len += asset_locked_amount.consensus_encode(w)?;
+            } else {
+                return Err(Error::new(ErrorKind::InvalidInput, "asset_locked_amount is not set"));
+            }
+        }
+        Ok(len)
+    }
+}
+
+impl Decodable for CoinbasePayload {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let version = u16::consensus_decode(r)?;
+        let height = u32::consensus_decode(r)?;
+        let merkle_root_masternode_list = MerkleRootMasternodeList::consensus_decode(r)?;
+        let merkle_root_quorums = MerkleRootQuorums::consensus_decode(r)?;
+        let best_cl_height = if version >= 3 { Some(u32::consensus_decode(r)?) } else { None };
+        let best_cl_signature = if version >= 3 { Some(Vec::<u8>::consensus_decode(r)?) } else { None };
+        let asset_locked_amount = if version >= 3 { Some(u64::consensus_decode(r)?) } else { None };
+        Ok(CoinbasePayload {
+            version,
+            height,
+            merkle_root_masternode_list,
+            merkle_root_quorums,
+            best_cl_height,
+            best_cl_signature,
+            asset_locked_amount,
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use hashes::{Hash};
+    use crate::consensus::Encodable;
+    use crate::hash_types::{MerkleRootMasternodeList, MerkleRootQuorums};
+    use crate::transaction::special_transaction::coinbase::CoinbasePayload;
+
+    #[test]
+    fn size() {
+        let test_cases: &[(usize, u16)] = &[(70, 2), (179, 3)];
+        for (want, version) in test_cases.iter() {
+            let payload = CoinbasePayload {
+                height: 1000,
+                version: *version,
+                merkle_root_masternode_list: MerkleRootMasternodeList::all_zeros(),
+                merkle_root_quorums: MerkleRootQuorums::all_zeros(),
+                best_cl_height: Some(900),
+                best_cl_signature: Some(vec![0; 96]),
+                asset_locked_amount: Some(10000),
+            };
+            assert_eq!(payload.size(), *want);
+            let actual = payload.consensus_encode(&mut Vec::new()).unwrap();
+            assert_eq!(actual, *want);
+        }
+    }
+}
diff --git a/src/blockdata/transaction/special_transaction/mod.rs b/dash/src/blockdata/transaction/special_transaction/mod.rs
similarity index 80%
rename from src/blockdata/transaction/special_transaction/mod.rs
rename to dash/src/blockdata/transaction/special_transaction/mod.rs
index abe0e5e0a..531765d5b 100644
--- a/src/blockdata/transaction/special_transaction/mod.rs
+++ b/dash/src/blockdata/transaction/special_transaction/mod.rs
@@ -15,27 +15,26 @@
 //! Dash Special Transaction.
 //!
 //! A dash special transaction's purpose is to relay more data than just economic information.
-//! They are defined in DIP2 https://github.com/dashpay/dips/blob/master/dip-0002.md.
+//! They are defined in DIP2 [dip-0002](https://github.com/dashpay/dips/blob/master/dip-0002.md).
 //! The list of special transactions can be found here:
-//! https://github.com/dashpay/dips/blob/master/dip-0002-special-transactions.md
+//! [dip-0002-special-transactions](https://github.com/dashpay/dips/blob/master/dip-0002-special-transactions.md)
 //!
 
 use core::fmt::{Debug, Display, Formatter};
 use core::convert::TryFrom;
-use io;
-use io::{Error, Read, Write};
-use blockdata::transaction::special_transaction::asset_lock::AssetLockPayload;
-use blockdata::transaction::special_transaction::coinbase::CoinbasePayload;
-use blockdata::transaction::special_transaction::asset_unlock::qualified_asset_unlock::AssetUnlockPayload;
-use blockdata::transaction::special_transaction::provider_registration::ProviderRegistrationPayload;
-use blockdata::transaction::special_transaction::provider_update_registrar::ProviderUpdateRegistrarPayload;
-use blockdata::transaction::special_transaction::provider_update_revocation::ProviderUpdateRevocationPayload;
-use blockdata::transaction::special_transaction::provider_update_service::ProviderUpdateServicePayload;
-use blockdata::transaction::special_transaction::quorum_commitment::QuorumCommitmentPayload;
-use blockdata::transaction::special_transaction::TransactionPayload::{AssetLockPayloadType, AssetUnlockPayloadType, CoinbasePayloadType, ProviderRegistrationPayloadType, ProviderUpdateRegistrarPayloadType, ProviderUpdateRevocationPayloadType, ProviderUpdateServicePayloadType, QuorumCommitmentPayloadType};
-use blockdata::transaction::special_transaction::TransactionType::{AssetLock, Classic, Coinbase, AssetUnlock, ProviderRegistration, ProviderUpdateRegistrar, ProviderUpdateRevocation, ProviderUpdateService, QuorumCommitment};
-use consensus::{Decodable, Encodable, encode};
-use ::{SpecialTransactionPayloadHash, VarInt};
+use crate::io;
+use crate::blockdata::transaction::special_transaction::asset_lock::AssetLockPayload;
+use crate::blockdata::transaction::special_transaction::coinbase::CoinbasePayload;
+use crate::blockdata::transaction::special_transaction::asset_unlock::qualified_asset_unlock::AssetUnlockPayload;
+use crate::blockdata::transaction::special_transaction::provider_registration::ProviderRegistrationPayload;
+use crate::blockdata::transaction::special_transaction::provider_update_registrar::ProviderUpdateRegistrarPayload;
+use crate::blockdata::transaction::special_transaction::provider_update_revocation::ProviderUpdateRevocationPayload;
+use crate::blockdata::transaction::special_transaction::provider_update_service::ProviderUpdateServicePayload;
+use crate::blockdata::transaction::special_transaction::quorum_commitment::QuorumCommitmentPayload;
+use crate::blockdata::transaction::special_transaction::TransactionPayload::{AssetLockPayloadType, AssetUnlockPayloadType, CoinbasePayloadType, ProviderRegistrationPayloadType, ProviderUpdateRegistrarPayloadType, ProviderUpdateRevocationPayloadType, ProviderUpdateServicePayloadType, QuorumCommitmentPayloadType};
+use crate::blockdata::transaction::special_transaction::TransactionType::{AssetLock, Classic, Coinbase, AssetUnlock, ProviderRegistration, ProviderUpdateRegistrar, ProviderUpdateRevocation, ProviderUpdateService, QuorumCommitment};
+use crate::consensus::{Decodable, Encodable, encode, encode::VarInt};
+use crate::hash_types::{SpecialTransactionPayloadHash};
 
 pub mod provider_registration;
 pub mod provider_update_service;
@@ -50,6 +49,7 @@ pub mod asset_unlock;
 /// Special transactions are defined in DIP 2.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub enum TransactionPayload {
     /// A wrapper for a Masternode Registration payload
     ProviderRegistrationPayloadType(ProviderRegistrationPayload),
@@ -70,16 +70,16 @@ pub enum TransactionPayload {
 }
 
 impl Encodable for TransactionPayload {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
         match self {
-            ProviderRegistrationPayloadType(p) => { p.consensus_encode(&mut s)}
-            ProviderUpdateServicePayloadType(p) => { p.consensus_encode(&mut s)}
-            ProviderUpdateRegistrarPayloadType(p) => {p.consensus_encode(&mut s)}
-            ProviderUpdateRevocationPayloadType(p) => {p.consensus_encode(&mut s)}
-            CoinbasePayloadType(p) => {p.consensus_encode(&mut s)}
-            QuorumCommitmentPayloadType(p) => {p.consensus_encode(&mut s)}
-            AssetLockPayloadType(p) => {p.consensus_encode(&mut s)}
-            AssetUnlockPayloadType(p) => {p.consensus_encode(&mut s)}
+            ProviderRegistrationPayloadType(p) => { p.consensus_encode(w)}
+            ProviderUpdateServicePayloadType(p) => { p.consensus_encode(w)}
+            ProviderUpdateRegistrarPayloadType(p) => {p.consensus_encode(w)}
+            ProviderUpdateRevocationPayloadType(p) => {p.consensus_encode(w)}
+            CoinbasePayloadType(p) => {p.consensus_encode(w)}
+            QuorumCommitmentPayloadType(p) => {p.consensus_encode(w)}
+            AssetLockPayloadType(p) => {p.consensus_encode(w)}
+            AssetUnlockPayloadType(p) => {p.consensus_encode(w)}
         }
     }
 }
@@ -99,6 +99,21 @@ impl TransactionPayload {
         }
     }
 
+    /// Gets the size of the special transaction payload
+    pub fn len(&self) -> usize {
+        // 1 byte is the size of the special transaction type
+        1 + match self {
+            ProviderRegistrationPayloadType(p) => { p.size()}
+            ProviderUpdateServicePayloadType(p) => { p.size() }
+            ProviderUpdateRegistrarPayloadType(p) => {p.size() }
+            ProviderUpdateRevocationPayloadType(p) => {p.size()}
+            CoinbasePayloadType(p) => {p.size()}
+            QuorumCommitmentPayloadType(p) => {p.size()}
+            AssetLockPayloadType(p) => {p.size()}
+            AssetUnlockPayloadType(p) => {p.size()}
+        }
+    }
+
     /// Convenience method that assumes the payload to be a provider registration payload to get it
     /// easier.
     /// Errors if it is not a provider registration payload.
@@ -268,8 +283,8 @@ impl TryFrom<u16> for TransactionType {
 }
 
 impl Decodable for TransactionType {
-    fn consensus_decode<D: Read>(d: D) -> Result<Self, encode::Error> {
-        let special_transaction_number = u16::consensus_decode(d)?;
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let special_transaction_number = u16::consensus_decode(r)?;
         TransactionType::try_from(special_transaction_number)
     }
 }
@@ -285,10 +300,10 @@ impl TransactionType {
     }
 
     /// Decodes the payload based on the transaction type.
-    pub fn consensus_decode<D: io::Read>(self, mut d: D) -> Result<Option<TransactionPayload>, encode::Error> {
+    pub fn consensus_decode<R: io::Read + ?Sized>(self, d: &mut R) -> Result<Option<TransactionPayload>, encode::Error> {
         let _len = match self {
             Classic => { VarInt(0) }
-            _ => VarInt::consensus_decode(&mut d)?
+            _ => VarInt::consensus_decode(d)?
         };
 
         Ok(match self {
diff --git a/src/blockdata/transaction/special_transaction/provider_registration.rs b/dash/src/blockdata/transaction/special_transaction/provider_registration.rs
similarity index 66%
rename from src/blockdata/transaction/special_transaction/provider_registration.rs
rename to dash/src/blockdata/transaction/special_transaction/provider_registration.rs
index 923662364..c7dee0b47 100644
--- a/src/blockdata/transaction/special_transaction/provider_registration.rs
+++ b/dash/src/blockdata/transaction/special_transaction/provider_registration.rs
@@ -15,7 +15,7 @@
 //! Dash Provider Registration Special Transaction.
 //!
 //! The provider registration special transaction is used to register a masternode.
-//! It is defined in DIP3 https://github.com/dashpay/dips/blob/master/dip-0003.md.
+//! It is defined in DIP3 [dip-0003](https://github.com/dashpay/dips/blob/master/dip-0003.md).
 //!
 //! The ProRegTx contains 2 public key IDs and one BLS public key, which represent 3 different
 //! roles in the masternode and define update and voting rights. A "public key ID" refers to the
@@ -34,19 +34,20 @@
 //! KeyIdVoting (renamed to voting_key_hash): This is the public key ID used for proposal voting.
 //! Votes signed with this key are valid while the masternode is in the registered set.
 
-use prelude::*;
-use io;
-use io::{Error, Write};
+use crate::prelude::*;
+use crate::{io, VarInt};
 use hashes::Hash;
-use hashes::hex::ToHex;
-use ::{OutPoint, Script};
-use consensus::{Decodable, Encodable, encode};
-use ::{InputsHash};
-use ::{Address, Network};
-use blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
-use bls_sig_utils::BLSPublicKey;
-use ::{PubkeyHash, SpecialTransactionPayloadHash};
-use util::address::Payload;
+use internals::hex::Case::Lower;
+use crate::{ScriptBuf};
+use crate::{OutPoint};
+use crate::consensus::{Decodable, Encodable, encode};
+use crate::hash_types::{InputsHash};
+use crate::{Address};
+use crate::blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
+use crate::bls_sig_utils::BLSPublicKey;
+use crate::hash_types::{PubkeyHash, SpecialTransactionPayloadHash};
+use crate::address::Payload;
+use crate::Network;
 
 /// A Provider Registration Payload used in a Provider Registration Special Transaction.
 /// This is used to register a Masternode on the network.
@@ -62,6 +63,7 @@ use util::address::Payload;
 /// *The inputs hash is used to guarantee the uniqueness of the payload sig.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct ProviderRegistrationPayload {
     version: u16,
     provider_type: u16,
@@ -73,7 +75,7 @@ pub struct ProviderRegistrationPayload {
     operator_public_key: BLSPublicKey,
     voting_key_hash: PubkeyHash,
     operator_reward: u16,
-    script_payout: Script,
+    script_payout: ScriptBuf,
     inputs_hash: InputsHash,
     payload_sig: Vec<u8>,
 }
@@ -81,35 +83,48 @@ pub struct ProviderRegistrationPayload {
 impl ProviderRegistrationPayload {
     /// A convenience method to get the address from payout script
     pub fn payout_address(&self, network: Network) -> Result<Address, encode::Error> {
-        Address::from_script(&self.script_payout, network).ok_or(encode::Error::NonStandardScriptPayout(self.script_payout.clone()))
+        match Address::from_script(&self.script_payout, network) {
+            Ok(addr) => Ok(addr),
+            Err(_) => Err(encode::Error::NonStandardScriptPayout(self.script_payout.clone())),
+        }
     }
     /// A convenience method to get the address from the owner key hash
     pub fn owner_address(&self, network: Network) -> Address {
-        Address {
-            payload: Payload::PubkeyHash(self.owner_key_hash),
-            network,
-        }
+        Address::new(network, Payload::PubkeyHash(self.owner_key_hash))
     }
     /// A convenience method to get the address from the voting key hash
     pub fn voting_address(&self, network: Network) -> Address {
-        Address {
-            payload: Payload::PubkeyHash(self.voting_key_hash),
-            network,
-        }
+        Address::new(network, Payload::PubkeyHash(self.voting_key_hash))
     }
     /// This is used to prove access to the collateral. The collateral private key signs
     /// a string of formatted values proving access to the 1000 Dash and therefore the ability
     /// to register the masternode.
     pub fn payload_collateral_string(&self, network: Network) -> Result<String, encode::Error> {
-        let mut base_payload_hash = self.base_payload_hash().to_vec();
+        let base_payload_hash = self.base_payload_hash();
+        let mut base_payload_hash = *base_payload_hash.as_raw_hash().as_byte_array();
         base_payload_hash.reverse();
         let base_payload_hash = SpecialTransactionPayloadHash::from_slice(base_payload_hash.as_slice()).unwrap();
-        Ok(format!("{}|{}|{}|{}|{}", self.payout_address(network)?, self.operator_reward, self.owner_address(network), self.voting_address(network), base_payload_hash.to_hex()))
+        Ok(format!("{}|{}|{}|{}|{}", self.payout_address(network)?, self.operator_reward, self.owner_address(network), self.voting_address(network), base_payload_hash.as_byte_array().to_hex_string(Lower)))
+    }
+
+    /// The size of the payload in bytes.
+    /// version(2) + provider_type(2) + provider_mode(2) + collateral_outpoint(32 + 4) + ip_address(16) +
+    /// port(2) + owner_key_hash(20) + operator_public_key(48) + voting_key_hash(20) + operator_reward(2) +
+    /// script_payout(VarInt(script_payout_len).len() + script_payout_len) +
+    /// inputs_hash(32) +
+    /// payload_sig(VarInt(payload_sig_len).len() + payload_sig_len)
+    pub fn size(&self) -> usize {
+        let mut size = 2 + 2 + 2 + 32 + 4 + 16 + 2 + 20 + 48 + 20 + 2 + 32; // 182 bytes
+        let script_payout_len = self.script_payout.0.len();
+        let payload_sig_len = self.payload_sig.len();
+        size += VarInt(script_payout_len as u64).len() + script_payout_len;
+        size += VarInt(payload_sig_len as u64).len() + payload_sig_len;
+        size
     }
 }
 
 impl SpecialTransactionBasePayloadEncodable for ProviderRegistrationPayload {
-    fn base_payload_data_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn base_payload_data_encode<W: io::Write>(&self, mut s: W) -> Result<usize, io::Error> {
         let mut len = 0;
         len += self.version.consensus_encode(&mut s)?;
         len += self.provider_type.consensus_encode(&mut s)?;
@@ -134,29 +149,29 @@ impl SpecialTransactionBasePayloadEncodable for ProviderRegistrationPayload {
 }
 
 impl Encodable for ProviderRegistrationPayload {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, mut w: &mut W) -> Result<usize, io::Error> {
         let mut len = 0;
-        len += self.base_payload_data_encode(&mut s)?;
-        len += self.payload_sig.consensus_encode(&mut s)?;
+        len += self.base_payload_data_encode(&mut w)?;
+        len += self.payload_sig.consensus_encode(&mut w)?;
         Ok(len)
     }
 }
 
 impl Decodable for ProviderRegistrationPayload {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let version = u16::consensus_decode(&mut d)?;
-        let provider_type = u16::consensus_decode(&mut d)?;
-        let provider_mode = u16::consensus_decode(&mut d)?;
-        let collateral_outpoint = OutPoint::consensus_decode(&mut d)?;
-        let ip_address = u128::consensus_decode(&mut d)?;
-        let port = u16::swap_bytes(u16::consensus_decode(&mut d)?);
-        let owner_key_hash = PubkeyHash::consensus_decode(&mut d)?;
-        let operator_public_key = BLSPublicKey::consensus_decode(&mut d)?;
-        let voting_key_hash = PubkeyHash::consensus_decode(&mut d)?;
-        let operator_reward = u16::consensus_decode(&mut d)?;
-        let script_payout = Script::consensus_decode(&mut d)?;
-        let inputs_hash = InputsHash::consensus_decode(&mut d)?;
-        let payload_sig = Vec::<u8>::consensus_decode(&mut d)?;
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let version = u16::consensus_decode(r)?;
+        let provider_type = u16::consensus_decode(r)?;
+        let provider_mode = u16::consensus_decode(r)?;
+        let collateral_outpoint = OutPoint::consensus_decode(r)?;
+        let ip_address = u128::consensus_decode(r)?;
+        let port = u16::swap_bytes(u16::consensus_decode(r)?);
+        let owner_key_hash = PubkeyHash::consensus_decode(r)?;
+        let operator_public_key = BLSPublicKey::consensus_decode(r)?;
+        let voting_key_hash = PubkeyHash::consensus_decode(r)?;
+        let operator_reward = u16::consensus_decode(r)?;
+        let script_payout = ScriptBuf::consensus_decode(r)?;
+        let inputs_hash = InputsHash::consensus_decode(r)?;
+        let payload_sig = Vec::<u8>::consensus_decode(r)?;
 
         Ok(ProviderRegistrationPayload {
             version,
@@ -177,33 +192,34 @@ impl Decodable for ProviderRegistrationPayload {
 }
 
 #[cfg(test)]
-#[cfg(feature="signer")]
 mod tests {
     use core::str::FromStr;
     use std::net::Ipv4Addr;
     use hashes::Hash;
-    use hashes::hex::{FromHex, ToHex};
-    use consensus::{deserialize};
-    use ::{Transaction};
-    use ::{InputsHash, Txid};
-    use ::{Network, OutPoint};
-    use util::misc::signed_msg_hash;
-    use ::{hex, PrivateKey};
-    use blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
-    use ::{Address};
-    use signer::{sign_hash};
-    use ::{TxIn, TxOut};
-    use blockdata::transaction::special_transaction::provider_registration::ProviderRegistrationPayload;
-    use blockdata::transaction::special_transaction::TransactionPayload::ProviderRegistrationPayloadType;
-    use bls_sig_utils::BLSPublicKey;
-    use ::{PubkeyHash};
+    use hashes::hex::{FromHex};
+    use internals::hex::display::DisplayHex;
+    use crate::consensus::{deserialize, Encodable};
+    use crate::{PrivateKey, ScriptBuf, Transaction, Txid, Witness};
+    use crate::{Network, OutPoint};
+    use crate::blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
+    use crate::{Address};
+    use crate::{TxIn, TxOut};
+    use crate::transaction::special_transaction::provider_registration::ProviderRegistrationPayload;
+    use crate::transaction::special_transaction::TransactionPayload::ProviderRegistrationPayloadType;
+    use crate::{PubkeyHash};
+    use crate::bls_sig_utils::BLSPublicKey;
+    use crate::hash_types::InputsHash;
+    use crate::internal_macros::hex;
+    use crate::sign_message::signed_msg_hash;
+    use crate::signer::sign_hash;
 
     #[test]
+    #[cfg(feature = "signer")]
     fn test_collateral_provider_registration_transaction() {
         // This is a test for testnet
         let network = Network::Testnet;
 
-        let expected_transaction_bytes = hex::decode("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").unwrap();
+        let expected_transaction_bytes = hex!("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");
 
         let expected_transaction: Transaction = deserialize(expected_transaction_bytes.as_slice()).expect("expected a transaction");
 
@@ -219,15 +235,11 @@ mod tests {
         //    ycBFJGv7V95aSs6XvMewFyp1AMngeRHBwy
 
         let tx_id = Txid::from_hex("e65f550356250100513aa9c260400562ac8ee1b93ae1cc1214cc9f6830227b51").expect("expected to decode tx id");
-        let input_transaction_hash_value = InputsHash::from_hex("ca9a43051750da7c5f858008f2ff7732d15691e48eb7f845c791e5dca78bab58").expect("expected to decode inputs hash");
-        let input_address0 = "yQxPwSSicYgXiU22k4Ysq464VxRtgbnvpJ";
-        let input_private_key0 = "cVfGhHY18Dx1EfZxFRkrvzVpB3wPtJGJWW6QvEtzMcfXSShoZyWV";
         let output_address0 = Address::from_str("yTWY6DsS4HBGs2JwDtnvVcpykLkbvtjUte").expect("expected to be able to get output address");
         let collateral_address = Address::from_str("yeNVS6tFeQNXJVkjv6nm6gb7PtTERV5dGh").expect("expected to be able to get collateral address");
         let collateral_private_key = PrivateKey::from_wif("cTVm7EkgzNBPcwAKGYHfvyK8cyrRAC8n3SUUw8qjLqCg2rpcczfo").expect("expected valid base 58");
         let collateral_hash = Txid::from_hex("58ab8ba7dce591c745f8b78ee49156d13277fff20880855f7cda501705439aca").expect("expected to decode collateral hash");
         let collateral_index = 0;
-        let collateral_outpoint = OutPoint::new(collateral_hash, collateral_index);
         let payout_address = Address::from_str("yTb47qEBpNmgXvYYsHEN4nh8yJwa5iC4Cs").expect("expected a valid address");
 
         let payload_collateral_string = expected_provider_registration_payload.payload_collateral_string(network).expect("expected to produce a payload collateral string");
@@ -242,14 +254,14 @@ mod tests {
 
         let collateral_outpoint = OutPoint {
             txid: collateral_hash,
-            vout: collateral_index
+            vout: collateral_index,
         };
         assert_eq!(expected_provider_registration_payload.collateral_outpoint, collateral_outpoint);
 
         let address = Ipv4Addr::from_str("1.2.5.6").expect("expected an ipv4 address");
         let [a, b, c, d] = address.octets();
-        let ipv6_bytes: [u8;16] = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, a, b, c, d];
-        assert_eq!(ipv6_bytes.to_hex(), expected_provider_registration_payload.ip_address.to_le_bytes().to_hex());
+        let ipv6_bytes: [u8; 16] = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, a, b, c, d];
+        assert_eq!(ipv6_bytes.to_lower_hex_string(), expected_provider_registration_payload.ip_address.to_le_bytes().to_lower_hex_string());
 
         let port = 19999;
         assert_eq!(port, expected_provider_registration_payload.port);
@@ -275,11 +287,11 @@ mod tests {
         assert_eq!(operator_reward, expected_provider_registration_payload.operator_reward);
 
         // We should verify the script payouts match
-        let script_payout = payout_address.script_pubkey();
+        let script_payout = payout_address.assume_checked().script_pubkey();
         assert_eq!(script_payout, expected_provider_registration_payload.script_payout);
 
         let expected_base64_signature = "H7N+ScH/K4BXcTk5pVE+bnEacc/y5RfmIk33JO11Cu8bf5rZ7GErSnJQIy4eQA2nGKlQHh2aVWVSbksf9owCh2M=";
-        let signature = sign_hash(message_digest.as_inner().as_slice(), collateral_private_key.to_bytes().as_slice()).expect("expected to sign message digest");
+        let signature = sign_hash(message_digest.as_byte_array().as_slice(), collateral_private_key.to_bytes().as_slice()).expect("expected to sign message digest");
         let base64_signature = base64::encode(signature.as_slice());
 
         assert_eq!(expected_base64_signature, base64_signature, "message digest signatures don't match");
@@ -291,13 +303,13 @@ mod tests {
         let mut transaction = Transaction {
             version: 3,
             lock_time: 0,
-            input: vec![TxIn{
+            input: vec![TxIn {
                 previous_output: OutPoint::new(collateral_hash, 1),
-                script_sig: collateral_address.script_pubkey(),
+                script_sig: collateral_address.assume_checked().script_pubkey(),
                 sequence: 4294967295,
-                witness: Default::default()
+                witness: Default::default(),
             }],
-            output: vec![TxOut::new_from_address(40777037710, &output_address0)],
+            output: vec![TxOut::new_from_address(40777037710, &output_address0.assume_checked())],
             special_transaction_payload: Some(ProviderRegistrationPayloadType(ProviderRegistrationPayload {
                 version: provider_registration_payload_version,
                 provider_type,
@@ -311,8 +323,8 @@ mod tests {
                 operator_reward,
                 script_payout,
                 inputs_hash: InputsHash::from_hex(inputs_hash_hex).unwrap(),
-                payload_sig: signature.to_vec()
-            }))
+                payload_sig: signature.to_vec(),
+            })),
         };
         // We are currently not supporting transaction signing
         // So just assume signature is correct
@@ -328,31 +340,26 @@ mod tests {
     //todo finish this somewhat low value test
     #[ignore]
     #[test]
+    #[cfg(feature = "signer")]
     fn test_no_collateral_provider_registration_transaction() {
         // This is a test for testnet
         let network = Network::Testnet;
 
-        let expected_transaction_bytes = hex::decode("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").unwrap();
+        let expected_transaction_bytes = Vec::from_hex("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").unwrap();
 
         let expected_transaction: Transaction = deserialize(expected_transaction_bytes.as_slice()).expect("expected a transaction");
 
         let expected_provider_registration_payload = expected_transaction.special_transaction_payload.clone().unwrap().to_provider_registration_payload().expect("expected to get a provider registration payload");
 
-        let tx_id = Txid::from_hex("717d2d4a7d583da184872f4a07e35d897a1be9dd9875b4c017c81cf772e36694").expect("expected to decode tx id");
-        let input_transaction_hash_value = InputsHash::from_hex("ca9a43051750da7c5f858008f2ff7732d15691e48eb7f845c791e5dca78bab58").expect("expected to decode inputs hash");
+        let tx_id = Txid::from_hex("717d2d4a7d583da184872f4a07e35d897a1be9dd9875b4c017c81cf772e36694").unwrap();
 
-        let input_address0 = "yQxPwSSicYgXiU22k4Ysq464VxRtgbnvpJ";
-        let input_private_key0 = "cVfGhHY18Dx1EfZxFRkrvzVpB3wPtJGJWW6QvEtzMcfXSShoZyWV";
         let output_address0 = Address::from_str("yTWY6DsS4HBGs2JwDtnvVcpykLkbvtjUte").expect("expected to be able to get output address");
         let collateral_address = Address::from_str("yeNVS6tFeQNXJVkjv6nm6gb7PtTERV5dGh").expect("expected to be able to get collateral address");
         let collateral_private_key = PrivateKey::from_wif("cTVm7EkgzNBPcwAKGYHfvyK8cyrRAC8n3SUUw8qjLqCg2rpcczfo").expect("expected valid base 58");
         let collateral_hash = Txid::from_hex("58ab8ba7dce591c745f8b78ee49156d13277fff20880855f7cda501705439aca").expect("expected to decode collateral hash");
-        let collateral_index = 0;
-        let collateral_outpoint = OutPoint::new(collateral_hash, collateral_index);
         let payout_address = Address::from_str("yTb47qEBpNmgXvYYsHEN4nh8yJwa5iC4Cs").expect("expected a valid address");
 
         let payload_collateral_string = expected_provider_registration_payload.payload_collateral_string(network).expect("expected to produce a payload collateral string");
-        let message_digest = signed_msg_hash(payload_collateral_string.as_str());
 
         let provider_registration_payload_version = 1;
         assert_eq!(expected_provider_registration_payload.version, provider_registration_payload_version);
@@ -363,14 +370,14 @@ mod tests {
 
         let collateral_outpoint = OutPoint {
             txid: collateral_hash,
-            vout: collateral_index
+            vout: 0,
         };
         assert_eq!(expected_provider_registration_payload.collateral_outpoint, collateral_outpoint);
 
         let address = Ipv4Addr::from_str("1.1.1.1").expect("expected an ipv4 address");
         let [a, b, c, d] = address.octets();
-        let ipv6_bytes: [u8;16] = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, a, b, c, d];
-        assert_eq!(ipv6_bytes.to_hex(), expected_provider_registration_payload.ip_address.to_le_bytes().to_hex());
+        let ipv6_bytes: [u8; 16] = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, a, b, c, d];
+        assert_eq!(ipv6_bytes.to_lower_hex_string(), expected_provider_registration_payload.ip_address.to_le_bytes().to_lower_hex_string());
 
         let port = 19999;
         assert_eq!(port, expected_provider_registration_payload.port);
@@ -396,11 +403,11 @@ mod tests {
         assert_eq!(operator_reward, expected_provider_registration_payload.operator_reward);
 
         // We should verify the script payouts match
-        let script_payout = payout_address.script_pubkey();
+        let script_payout = payout_address.assume_checked().script_pubkey();
         assert_eq!(script_payout, expected_provider_registration_payload.script_payout);
 
         let expected_base64_signature = "H7N+ScH/K4BXcTk5pVE+bnEacc/y5RfmIk33JO11Cu8bf5rZ7GErSnJQIy4eQA2nGKlQHh2aVWVSbksf9owCh2M=";
-        let signature = sign_hash(message_digest.as_inner().as_slice(), collateral_private_key.to_bytes().as_slice()).expect("expected to sign message digest");
+        let signature = sign_hash(base64::decode(&expected_base64_signature).expect("expected valid base64").as_slice(), collateral_private_key.to_bytes().as_slice()).expect("expected to sign message digest");
         let base64_signature = base64::encode(signature.as_slice());
 
         assert_eq!(expected_base64_signature, base64_signature, "message digest signatures don't match");
@@ -412,13 +419,13 @@ mod tests {
         let mut transaction = Transaction {
             version: 3,
             lock_time: 0,
-            input: vec![TxIn{
+            input: vec![TxIn {
                 previous_output: OutPoint::new(collateral_hash, 1),
-                script_sig: collateral_address.script_pubkey(),
+                script_sig: collateral_address.assume_checked().script_pubkey(),
                 sequence: 4294967295,
-                witness: Default::default()
+                witness: Witness::new(),
             }],
-            output: vec![TxOut::new_from_address(40777037710, &output_address0)],
+            output: vec![TxOut::new_from_address(40777037710, &output_address0.assume_checked())],
             special_transaction_payload: Some(ProviderRegistrationPayloadType(ProviderRegistrationPayload {
                 version: provider_registration_payload_version,
                 provider_type,
@@ -432,8 +439,8 @@ mod tests {
                 operator_reward,
                 script_payout,
                 inputs_hash: InputsHash::from_hex(inputs_hash_hex).unwrap(),
-                payload_sig: signature.to_vec()
-            }))
+                payload_sig: signature.to_vec(),
+            })),
         };
         // We are currently not supporting transaction signing
         // So just assume signature is correct
@@ -445,4 +452,30 @@ mod tests {
 
         assert_eq!(transaction.txid(), tx_id);
     }
-}
\ No newline at end of file
+
+    #[test]
+    fn size() {
+        let want = 290;
+        let payload = ProviderRegistrationPayload{
+            version: 0,
+            provider_type: 0,
+            provider_mode: 0,
+            collateral_outpoint: OutPoint{
+                txid: Txid::all_zeros(),
+                vout: 0,
+            },
+            ip_address: 0,
+            port: 0,
+            owner_key_hash: PubkeyHash::all_zeros(),
+            operator_public_key: BLSPublicKey::from([0; 48]),
+            voting_key_hash: PubkeyHash::all_zeros(),
+            operator_reward: 0,
+            script_payout: ScriptBuf::from_hex("00000000000000000000").unwrap(), // 10 bytes
+            inputs_hash: InputsHash::all_zeros(),
+            payload_sig: vec![0; 96],
+        };
+        assert_eq!(payload.size(), want);
+        let actual = payload.consensus_encode(&mut Vec::new()).unwrap();
+        assert_eq!(actual, want);
+    }
+}
diff --git a/src/blockdata/transaction/special_transaction/provider_update_registrar.rs b/dash/src/blockdata/transaction/special_transaction/provider_update_registrar.rs
similarity index 61%
rename from src/blockdata/transaction/special_transaction/provider_update_registrar.rs
rename to dash/src/blockdata/transaction/special_transaction/provider_update_registrar.rs
index 0949630b4..8d9ac8961 100644
--- a/src/blockdata/transaction/special_transaction/provider_update_registrar.rs
+++ b/dash/src/blockdata/transaction/special_transaction/provider_update_registrar.rs
@@ -17,7 +17,7 @@
 //! The provider update registrar special transaction is used to update the owner controlled options
 //! for a masternode.
 //!
-//! It is defined in DIP3 https://github.com/dashpay/dips/blob/master/dip-0003.md as follows:
+//! It is defined in DIP3 [dip-0003](https://github.com/dashpay/dips/blob/master/dip-0003.md) as follows:
 //!
 //! To registrar update a masternode, the masternode owner must submit another special transaction
 //! (DIP2) to the network. This special transaction is called a Provider Update Registrar
@@ -29,37 +29,44 @@
 //!
 //! The special transaction type used for ProUpRegTx Transactions is 3.
 
-use prelude::*;
-use io::Error;
-use io;
-use io::Write;
+use crate::prelude::*;
+use crate::{io, VarInt};
 use hashes::Hash;
-use ::{Script};
-use consensus::{Decodable, Encodable, encode};
-use ::{InputsHash};
-use blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
-use bls_sig_utils::BLSPublicKey;
-use ::{PubkeyHash, SpecialTransactionPayloadHash};
-use Txid;
+use crate::{ScriptBuf};
+use crate::consensus::{Decodable, Encodable, encode};
+use crate::blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
+use crate::bls_sig_utils::{BLSPublicKey};
+use crate::hash_types::{PubkeyHash, SpecialTransactionPayloadHash, Txid, InputsHash};
 
 /// A Provider Update Registrar Payload used in a Provider Update Registrar Special Transaction.
 /// This is used to update the base aspects a Masternode on the network.
 /// It must be signed by the owner's key that was set at registration.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct ProviderUpdateRegistrarPayload {
     version: u16,
     pro_tx_hash: Txid,
     provider_mode: u16,
     operator_public_key: BLSPublicKey,
     voting_key_hash: PubkeyHash,
-    script_payout: Script,
+    script_payout: ScriptBuf,
     inputs_hash: InputsHash,
-    payload_sig: Vec<u8>,
+    payload_sig: Vec<u8>, // TODO: Need to figure out, is this signature BLS Signature (length 96)
+}
+
+impl ProviderUpdateRegistrarPayload {
+    /// The size of the payload in bytes.
+    pub fn size(&self) -> usize {
+        let mut size = 2 + 32 + 2 + 48 + 20 + 32; // 136
+        size += VarInt(self.script_payout.len() as u64).len() + self.script_payout.len();
+        size += VarInt(self.payload_sig.len() as u64).len() + self.payload_sig.len();
+        size
+    }
 }
 
 impl SpecialTransactionBasePayloadEncodable for ProviderUpdateRegistrarPayload {
-    fn base_payload_data_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn base_payload_data_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
         let mut len = 0;
         len += self.version.consensus_encode(&mut s)?;
         len += self.pro_tx_hash.consensus_encode(&mut s)?;
@@ -79,24 +86,24 @@ impl SpecialTransactionBasePayloadEncodable for ProviderUpdateRegistrarPayload {
 }
 
 impl Encodable for ProviderUpdateRegistrarPayload {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, mut w: &mut W) -> Result<usize, io::Error> {
         let mut len = 0;
-        len += self.base_payload_data_encode(&mut s)?;
-        len += self.payload_sig.consensus_encode(&mut s)?;
+        len += self.base_payload_data_encode(&mut w)?;
+        len += self.payload_sig.consensus_encode(&mut w)?;
         Ok(len)
     }
 }
 
 impl Decodable for ProviderUpdateRegistrarPayload {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let version = u16::consensus_decode(&mut d)?;
-        let pro_tx_hash = Txid::consensus_decode(&mut d)?;
-        let provider_mode = u16::consensus_decode(&mut d)?;
-        let operator_public_key = BLSPublicKey::consensus_decode(&mut d)?;
-        let voting_key_hash = PubkeyHash::consensus_decode(&mut d)?;
-        let script_payout = Script::consensus_decode(&mut d)?;
-        let inputs_hash = InputsHash::consensus_decode(&mut d)?;
-        let payload_sig = Vec::<u8>::consensus_decode(&mut d)?;
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let version = u16::consensus_decode(r)?;
+        let pro_tx_hash = Txid::consensus_decode(r)?;
+        let provider_mode = u16::consensus_decode(r)?;
+        let operator_public_key = BLSPublicKey::consensus_decode(r)?;
+        let voting_key_hash = PubkeyHash::consensus_decode(r)?;
+        let script_payout = ScriptBuf::consensus_decode(r)?;
+        let inputs_hash = InputsHash::consensus_decode(r)?;
+        let payload_sig = Vec::<u8>::consensus_decode(r)?;
 
         Ok(ProviderUpdateRegistrarPayload {
             version,
@@ -113,33 +120,34 @@ impl Decodable for ProviderUpdateRegistrarPayload {
 
 #[cfg(test)]
 mod tests {
-    use hashes::hex::{FromHex, ToHex};
-    use consensus::deserialize;
-    use ::{Network, Transaction};
-    use ::{InputsHash, Txid};
-    use blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
-    use blockdata::transaction::special_transaction::TransactionPayload::{ProviderUpdateRegistrarPayloadType};
-    use ::{Script};
-    use blockdata::transaction::special_transaction::provider_update_registrar::ProviderUpdateRegistrarPayload;
-    use bls_sig_utils::BLSPublicKey;
-    use PubkeyHash;
+    use core::str::FromStr;
+    use hashes::Hash;
+    use crate::consensus::{deserialize, Encodable};
+    use crate::{Network, ScriptBuf, Transaction, Txid};
+    use crate::blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
+    use crate::bls_sig_utils::BLSPublicKey;
+    use crate::hash_types::InputsHash;
+    use crate::internal_macros::hex;
+    use crate::PubkeyHash;
+    use crate::transaction::special_transaction::provider_update_registrar::ProviderUpdateRegistrarPayload;
+    use crate::transaction::special_transaction::TransactionPayload::ProviderUpdateRegistrarPayloadType;
 
     #[test]
     fn test_provider_update_registrar_transaction() {
         // This is a test for testnet
         let _network = Network::Testnet;
 
-        let expected_transaction_bytes = hex::decode("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").unwrap();
+        let expected_transaction_bytes = hex!("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");
 
         let expected_transaction: Transaction = deserialize(expected_transaction_bytes.as_slice()).expect("expected a transaction");
 
         let expected_provider_update_registrar_payload = expected_transaction.special_transaction_payload.clone().unwrap().to_update_registrar_payload().expect("expected to get an update registrar payload");
 
-        let tx_id = Txid::from_hex("bd98378ca37d3ae6f4850b82e77be675feb3c9bc6e33cb0c23de1b38a08034c7").expect("expected to decode tx id");
+        let tx_id = Txid::from_str("bd98378ca37d3ae6f4850b82e77be675feb3c9bc6e33cb0c23de1b38a08034c7").expect("expected to decode tx id");
 
         let provider_update_registrar_payload_version = 1;
         assert_eq!(expected_provider_update_registrar_payload.version, provider_update_registrar_payload_version);
-        let pro_tx_hash = Txid::from_hex("3dbb7de94e219e8f7eaea4f3c01cf97d77372e10152734c1959f17302369aa49").expect("expected to decode tx id");
+        let pro_tx_hash = Txid::from_str("3dbb7de94e219e8f7eaea4f3c01cf97d77372e10152734c1959f17302369aa49").expect("expected to decode tx id");
         assert_eq!(expected_provider_update_registrar_payload.pro_tx_hash, pro_tx_hash);
 
         let provider_mode = 0;
@@ -158,7 +166,7 @@ mod tests {
 
         // We should verify the script payouts match
         let pubkey_hash = PubkeyHash::from_hex("56bcf3cac49235537d6ce0fb3214d8850a6db777").expect("expected to get pubkey hash");
-        let script_payout = Script::new_p2pkh(&pubkey_hash);
+        let script_payout = ScriptBuf::new_p2pkh(&pubkey_hash);
         assert_eq!(expected_provider_update_registrar_payload.script_payout, script_payout);
 
         assert_eq!(expected_transaction.txid(), tx_id);
@@ -189,4 +197,22 @@ mod tests {
 
         assert_eq!(transaction.txid(), tx_id);
     }
-}
\ No newline at end of file
+
+    #[test]
+    fn size() {
+        let want = 244;
+        let payload = ProviderUpdateRegistrarPayload{
+            version: 0,
+            pro_tx_hash: Txid::all_zeros(),
+            provider_mode:0,
+            operator_public_key: BLSPublicKey::from([0; 48]),
+            voting_key_hash: PubkeyHash::all_zeros(),
+            script_payout: ScriptBuf::from_hex("00000000000000000000").unwrap(), // 10 bytes
+            inputs_hash: InputsHash::all_zeros(),
+            payload_sig: vec![0; 96],
+        };
+        assert_eq!(payload.size(), want);
+        let actual = payload.consensus_encode(&mut Vec::new()).unwrap();
+        assert_eq!(actual, want);
+    }
+}
diff --git a/src/blockdata/transaction/special_transaction/provider_update_revocation.rs b/dash/src/blockdata/transaction/special_transaction/provider_update_revocation.rs
similarity index 62%
rename from src/blockdata/transaction/special_transaction/provider_update_revocation.rs
rename to dash/src/blockdata/transaction/special_transaction/provider_update_revocation.rs
index 224f6ad96..07fcdbb18 100644
--- a/src/blockdata/transaction/special_transaction/provider_update_revocation.rs
+++ b/dash/src/blockdata/transaction/special_transaction/provider_update_revocation.rs
@@ -17,7 +17,7 @@
 //! The provider update revocation special transaction is used to signal to the owner that they
 //! should choose a new operator.
 //!
-//! It is defined in DIP3 https://github.com/dashpay/dips/blob/master/dip-0003.md as follows:
+//! It is defined in DIP3 [dip-0003](https://github.com/dashpay/dips/blob/master/dip-0003.md) as follows:
 //!
 //! If an operator suspects their keys are insecure or if they wish to terminate service, they
 //! can issue a special transaction to the network. This special transaction is called a Provider
@@ -36,20 +36,19 @@
 
 //! The special transaction type used for Provider Update Revoking Transactions is 4.
 
-use io;
-use io::{Error, Write};
+use crate::io;
 use hashes::Hash;
-use blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
-use bls_sig_utils::BLSSignature;
-use consensus::{Decodable, Encodable, encode};
-use ::{InputsHash, SpecialTransactionPayloadHash};
-use Txid;
+use crate::blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
+use crate::bls_sig_utils::BLSSignature;
+use crate::consensus::{Decodable, Encodable, encode};
+use crate::hash_types::{InputsHash, SpecialTransactionPayloadHash, Txid};
 
 /// A Provider Update Revocation Payload used in a Provider Update Revocation Special Transaction.
 /// This is used to signal and stop a Masternode from the operator.
 /// It must be signed by the operator's key that was set at registration or registrar update.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct ProviderUpdateRevocationPayload {
     version: u16,
     pro_tx_hash: Txid,
@@ -58,8 +57,15 @@ pub struct ProviderUpdateRevocationPayload {
     payload_sig: BLSSignature,
 }
 
+impl ProviderUpdateRevocationPayload {
+    /// The size of the payload in bytes.
+    pub fn size(&self) -> usize {
+        2 + 32 + 2 + 32 + 96
+    }
+}
+
 impl SpecialTransactionBasePayloadEncodable for ProviderUpdateRevocationPayload {
-    fn base_payload_data_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn base_payload_data_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
         let mut len = 0;
         len += self.version.consensus_encode(&mut s)?;
         len += self.pro_tx_hash.consensus_encode(&mut s)?;
@@ -76,33 +82,53 @@ impl SpecialTransactionBasePayloadEncodable for ProviderUpdateRevocationPayload
 }
 
 impl Encodable for ProviderUpdateRevocationPayload {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, mut w: &mut W) -> Result<usize, io::Error> {
         let mut len = 0;
-        len += self.base_payload_data_encode(&mut s)?;
-        len += self.payload_sig.consensus_encode(&mut s)?;
+        len += self.base_payload_data_encode(&mut w)?;
+        len += self.payload_sig.consensus_encode(&mut w)?;
         Ok(len)
     }
 }
 
 impl Decodable for ProviderUpdateRevocationPayload {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let version = u16::consensus_decode(&mut d)?;
-        let pro_tx_hash = Txid::consensus_decode(&mut d)?;
-        let reason = u16::consensus_decode(&mut d)?;
-        let inputs_hash = InputsHash::consensus_decode(&mut d)?;
-        let payload_sig = BLSSignature::consensus_decode(&mut d)?;
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let version = u16::consensus_decode(r)?;
+        let pro_tx_hash = Txid::consensus_decode(r)?;
+        let reason = u16::consensus_decode(r)?;
+        let inputs_hash = InputsHash::consensus_decode(r)?;
+        let payload_sig = BLSSignature::consensus_decode(r)?;
 
         Ok(ProviderUpdateRevocationPayload {
             version,
             pro_tx_hash,
             reason,
             inputs_hash,
-            payload_sig
+            payload_sig,
         })
     }
 }
 
 #[cfg(test)]
 mod tests {
+    use hashes::Hash;
+    use crate::bls_sig_utils::BLSSignature;
+    use crate::consensus::Encodable;
+    use crate::hash_types::InputsHash;
+    use crate::transaction::special_transaction::provider_update_revocation::ProviderUpdateRevocationPayload;
+    use crate::Txid;
 
-}
\ No newline at end of file
+    #[test]
+    fn size() {
+        let want = 164;
+        let payload = ProviderUpdateRevocationPayload {
+            version: 0,
+            pro_tx_hash: Txid::all_zeros(),
+            reason: 0,
+            inputs_hash: InputsHash::all_zeros(),
+            payload_sig: BLSSignature::from([0; 96]),
+        };
+        let actual = payload.consensus_encode(&mut Vec::new()).unwrap();
+        assert_eq!(payload.size(), want);
+        assert_eq!(actual, want);
+    }
+}
diff --git a/src/blockdata/transaction/special_transaction/provider_update_service.rs b/dash/src/blockdata/transaction/special_transaction/provider_update_service.rs
similarity index 60%
rename from src/blockdata/transaction/special_transaction/provider_update_service.rs
rename to dash/src/blockdata/transaction/special_transaction/provider_update_service.rs
index 801d3ca8b..4d1cd638b 100644
--- a/src/blockdata/transaction/special_transaction/provider_update_service.rs
+++ b/dash/src/blockdata/transaction/special_transaction/provider_update_service.rs
@@ -17,7 +17,7 @@
 //! The provider update service special transaction is used to update the operator controlled
 //! options for a masternode.
 //!
-//! It is defined in DIP3 https://github.com/dashpay/dips/blob/master/dip-0003.md as follows:
+//! It is defined in DIP3 [dip-0003](https://github.com/dashpay/dips/blob/master/dip-0003.md) as follows:
 //!
 //! To service update a masternode, the masternode operator must submit another special
 //! transaction (DIP2) to the network. This special transaction is called a Provider Update
@@ -35,15 +35,13 @@
 //! The special transaction type used for ProUpServTx Transactions is 2.
 
 
-use io;
-use io::{Error, Write};
+use crate::{io, VarInt};
 use hashes::Hash;
-use ::{Script};
-use blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
-use bls_sig_utils::BLSSignature;
-use consensus::{Decodable, Encodable, encode};
-use ::{InputsHash, SpecialTransactionPayloadHash};
-use Txid;
+use crate::ScriptBuf;
+use crate::blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
+use crate::bls_sig_utils::BLSSignature;
+use crate::consensus::{Decodable, Encodable, encode};
+use crate::hash_types::{InputsHash, SpecialTransactionPayloadHash, Txid};
 
 /// A Provider Update Service Payload used in a Provider Update Service Special Transaction.
 /// This is used to update the operational aspects a Masternode on the network.
@@ -51,18 +49,28 @@ use Txid;
 /// registrar update of the masternode.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct ProviderUpdateServicePayload {
     version: u16,
     pro_tx_hash: Txid,
     ip_address: u128,
     port: u16,
-    script_payout: Script,
+    script_payout: ScriptBuf,
     inputs_hash: InputsHash,
     payload_sig: BLSSignature,
 }
 
+impl ProviderUpdateServicePayload {
+    /// The size of the payload in bytes.
+    pub fn size(&self) -> usize {
+        let mut size = 2 + 32 + 16 + 2 + 32 + 96; // 180
+        size += VarInt(self.script_payout.len() as u64).len() + self.script_payout.len();
+        size
+    }
+}
+
 impl SpecialTransactionBasePayloadEncodable for ProviderUpdateServicePayload {
-    fn base_payload_data_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn base_payload_data_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
         let mut len = 0;
         len += self.version.consensus_encode(&mut s)?;
         len += self.pro_tx_hash.consensus_encode(&mut s)?;
@@ -81,23 +89,23 @@ impl SpecialTransactionBasePayloadEncodable for ProviderUpdateServicePayload {
 }
 
 impl Encodable for ProviderUpdateServicePayload {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, mut w: &mut W) -> Result<usize, io::Error> {
         let mut len = 0;
-        len += self.base_payload_data_encode(&mut s)?;
-        len += self.payload_sig.consensus_encode(&mut s)?;
+        len += self.base_payload_data_encode(&mut w)?;
+        len += self.payload_sig.consensus_encode(&mut w)?;
         Ok(len)
     }
 }
 
 impl Decodable for ProviderUpdateServicePayload {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let version = u16::consensus_decode(&mut d)?;
-        let pro_tx_hash = Txid::consensus_decode(&mut d)?;
-        let ip_address = u128::consensus_decode(&mut d)?;
-        let port = u16::swap_bytes(u16::consensus_decode(&mut d)?);
-        let script_payout = Script::consensus_decode(&mut d)?;
-        let inputs_hash = InputsHash::consensus_decode(&mut d)?;
-        let payload_sig = BLSSignature::consensus_decode(&mut d)?;
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let version = u16::consensus_decode(r)?;
+        let pro_tx_hash = Txid::consensus_decode(r)?;
+        let ip_address = u128::consensus_decode(r)?;
+        let port = u16::swap_bytes(u16::consensus_decode(r)?);
+        let script_payout = ScriptBuf::consensus_decode(r)?;
+        let inputs_hash = InputsHash::consensus_decode(r)?;
+        let payload_sig = BLSSignature::consensus_decode(r)?;
 
         Ok(ProviderUpdateServicePayload {
             version,
@@ -115,48 +123,51 @@ impl Decodable for ProviderUpdateServicePayload {
 mod tests {
     use core::str::FromStr;
     use std::net::Ipv4Addr;
-    use hashes::hex::{FromHex, ToHex};
-    use consensus::deserialize;
-    use ::{Network, Transaction};
-    use ::{InputsHash, Txid};
-    use blockdata::transaction::special_transaction::provider_update_service::ProviderUpdateServicePayload;
-    use blockdata::transaction::special_transaction::SpecialTransactionBasePayloadEncodable;
-    use blockdata::transaction::special_transaction::TransactionPayload::ProviderUpdateServicePayloadType;
-    use ::{Script};
+    use hashes::Hash;
+    use crate::consensus::{deserialize, Encodable};
+    use crate::{Network, ScriptBuf, Transaction, Txid};
+    use crate::blockdata::transaction::special_transaction::{
+        provider_update_service::ProviderUpdateServicePayload,
+        SpecialTransactionBasePayloadEncodable,
+        TransactionPayload::ProviderUpdateServicePayloadType,
+    };
+    use crate::bls_sig_utils::BLSSignature;
+    use crate::hash_types::InputsHash;
+    use crate::internal_macros::hex;
 
     #[test]
     fn test_provider_update_service_transaction() {
         // This is a test for testnet
         let _network = Network::Testnet;
 
-        let expected_transaction_bytes = hex::decode("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").unwrap();
+        let expected_transaction_bytes = hex!("03000200018f3fe6683e36326669b6e34876fb2a2264e8327e822f6fec304b66f47d61b3e1010000006b48304502210082af6727408f0f2ec16c7da1c42ccf0a026abea6a3a422776272b03c8f4e262a022033b406e556f6de980b2d728e6812b3ae18ee1c863ae573ece1cbdf777ca3e56101210351036c1192eaf763cd8345b44137482ad24b12003f23e9022ce46752edf47e6effffffff0180220e43000000001976a914123cbc06289e768ca7d743c8174b1e6eeb610f1488ac00000000b501003a72099db84b1c1158568eec863bea1b64f90eccee3304209cebe1df5e7539fd00000000000000000000ffff342440944e1f00e6725f799ea20480f06fb105ebe27e7c4845ab84155e4c2adf2d6e5b73a998b1174f9621bbeda5009c5a6487bdf75edcf602b67fe0da15c275cc91777cb25f5fd4bb94e84fd42cb2bb547c83792e57c80d196acd47020e4054895a0640b7861b3729c41dd681d4996090d5750f65c4b649a5cd5b2bdf55c880459821e53d91c9");
 
         let expected_transaction: Transaction = deserialize(expected_transaction_bytes.as_slice()).expect("expected a transaction");
 
         let expected_provider_update_service_payload = expected_transaction.special_transaction_payload.clone().unwrap().to_update_service_payload().expect("expected to get a provider registration payload");
 
-        let tx_id = Txid::from_hex("fa2f2eba320c56fb0efebe2ace3333024104d8d0a30753da36db4bf97c119be7").expect("expected to decode tx id");
+        let tx_id = Txid::from_str("fa2f2eba320c56fb0efebe2ace3333024104d8d0a30753da36db4bf97c119be7").expect("expected to decode tx id");
 
         let provider_update_service_payload_version = 1;
         assert_eq!(expected_provider_update_service_payload.version, provider_update_service_payload_version);
-        let pro_tx_hash = Txid::from_hex("fd39755edfe1eb9c200433eecc0ef9641bea3b86ec8e5658111c4bb89d09723a").expect("expected to decode tx id");
+        let pro_tx_hash = Txid::from_str("fd39755edfe1eb9c200433eecc0ef9641bea3b86ec8e5658111c4bb89d09723a").expect("expected to decode tx id");
         assert_eq!(expected_provider_update_service_payload.pro_tx_hash, pro_tx_hash);
 
         let address = Ipv4Addr::from_str("52.36.64.148").expect("expected an ipv4 address");
         let [a, b, c, d] = address.octets();
-        let ipv6_bytes: [u8;16] = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, a, b, c, d];
-        assert_eq!(expected_provider_update_service_payload.ip_address.to_le_bytes().to_hex(), ipv6_bytes.to_hex());
+        let ipv6_bytes: [u8; 16] = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, a, b, c, d];
+        assert_eq!(expected_provider_update_service_payload.ip_address.to_le_bytes(), ipv6_bytes);
 
         let port = 19999;
         assert_eq!(expected_provider_update_service_payload.port, port);
 
         let inputs_hash_hex = "b198a9735b6e2ddf2a4c5e1584ab45487c7ee2eb05b16ff08004a29e795f72e6";
-        assert_eq!(expected_provider_update_service_payload.inputs_hash.to_hex(), inputs_hash_hex, "inputs hash calculation has issues");
+        assert_eq!(expected_provider_update_service_payload.inputs_hash.to_hex().as_str(), inputs_hash_hex, "inputs hash calculation has issues");
 
-        assert_eq!(expected_provider_update_service_payload.base_payload_hash().to_hex(), "9784b3663039784858420677b00f0b3f34af8ff1f1788adfd0e681d345b776ba", "Payload hash calculation has issues");
+        assert_eq!(expected_provider_update_service_payload.base_payload_hash().to_hex().as_str(), "9784b3663039784858420677b00f0b3f34af8ff1f1788adfd0e681d345b776ba", "Payload hash calculation has issues");
 
         // We should verify the script payouts match
-        let script_payout = Script::new();
+        let script_payout = ScriptBuf::new();
         assert_eq!(expected_provider_update_service_payload.script_payout, script_payout);
 
         assert_eq!(expected_transaction.txid(), tx_id);
@@ -175,9 +186,9 @@ mod tests {
                 ip_address: u128::from_le_bytes(ipv6_bytes),
                 port,
                 script_payout,
-                inputs_hash: InputsHash::from_hex(inputs_hash_hex).unwrap(),
-                payload_sig
-            }))
+                inputs_hash: InputsHash::from_str(inputs_hash_hex).unwrap(),
+                payload_sig,
+            })),
         };
 
         assert_eq!(transaction.hash_inputs().to_hex(), inputs_hash_hex);
@@ -186,4 +197,21 @@ mod tests {
 
         assert_eq!(transaction.txid(), tx_id);
     }
-}
\ No newline at end of file
+
+    #[test]
+    fn size() {
+        let want = 191;
+        let payload = ProviderUpdateServicePayload{
+            version: 0,
+            pro_tx_hash: Txid::all_zeros(),
+            ip_address: 0,
+            port: 0,
+            script_payout: ScriptBuf::from(vec![1,2,3,4,5,6,7,8,9,0]),
+            inputs_hash: InputsHash::all_zeros(),
+            payload_sig: BLSSignature::from([0; 96]),
+        };
+        let actual = payload.consensus_encode(&mut Vec::new()).unwrap();
+        assert_eq!(payload.size(), want);
+        assert_eq!(actual, want);
+    }
+}
diff --git a/dash/src/blockdata/transaction/special_transaction/quorum_commitment.rs b/dash/src/blockdata/transaction/special_transaction/quorum_commitment.rs
new file mode 100644
index 000000000..37299502f
--- /dev/null
+++ b/dash/src/blockdata/transaction/special_transaction/quorum_commitment.rs
@@ -0,0 +1,170 @@
+// Rust Dash Library
+// Written for Dash in 2022 by
+//     The Dash Core Developers
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Dash Quorum Commitment Special Transaction.
+//!
+//! It is defined in DIP6 [dip-0006.md](https://github.com/dashpay/dips/blob/master/dip-0006.md).
+//!
+
+use crate::prelude::*;
+use crate::{io, VarInt};
+use crate::hash_types::{QuorumHash, QuorumVVecHash};
+use crate::bls_sig_utils::{BLSPublicKey, BLSSignature};
+use crate::consensus::{Decodable, Encodable, encode};
+
+/// A Quorum Finalization Commitment. It is described in the finalization section of DIP6:
+/// [dip-0006.md#6-finalization-phase](https://github.com/dashpay/dips/blob/master/dip-0006.md#6-finalization-phase)
+///
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct QuorumFinalizationCommitment {
+    version: u16,
+    llmq_type: u8,
+    quorum_hash: QuorumHash,
+    signers: Vec<u8>,
+    valid_members: Vec<u8>,
+    quorum_public_key: BLSPublicKey,
+    quorum_vvec_hash: QuorumVVecHash,
+    quorum_sig: BLSSignature,
+    sig: BLSSignature,
+}
+
+impl QuorumFinalizationCommitment {
+    /// The size of the payload in bytes.
+    pub fn size(&self) -> usize {
+        let mut size = 2 + 1 + 32 + 48 + 32 + 96 + 96;
+        size += VarInt(self.signers.len() as u64).len() + self.signers.len();
+        size += VarInt(self.valid_members.len() as u64).len() + self.valid_members.len();
+        size
+    }
+}
+
+impl Encodable for QuorumFinalizationCommitment {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let mut len = 0;
+        len += self.version.consensus_encode(w)?;
+        len += self.llmq_type.consensus_encode(w)?;
+        len += self.quorum_hash.consensus_encode(w)?;
+        len += self.signers.consensus_encode(w)?;
+        len += self.valid_members.consensus_encode(w)?;
+        len += self.quorum_public_key.consensus_encode(w)?;
+        len += self.quorum_vvec_hash.consensus_encode(w)?;
+        len += self.quorum_sig.consensus_encode(w)?;
+        len += self.sig.consensus_encode(w)?;
+        Ok(len)
+    }
+}
+
+impl Decodable for QuorumFinalizationCommitment {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let version = u16::consensus_decode(r)?;
+        let llmq_type = u8::consensus_decode(r)?;
+        let quorum_hash = QuorumHash::consensus_decode(r)?;
+        let signers = Vec::<u8>::consensus_decode(r)?;
+        let valid_members = Vec::<u8>::consensus_decode(r)?;
+        let quorum_public_key = BLSPublicKey::consensus_decode(r)?;
+        let quorum_vvec_hash = QuorumVVecHash::consensus_decode(r)?;
+        let quorum_sig = BLSSignature::consensus_decode(r)?;
+        let sig = BLSSignature::consensus_decode(r)?;
+        Ok(QuorumFinalizationCommitment {
+            version,
+            llmq_type,
+            quorum_hash,
+            signers,
+            valid_members,
+            quorum_public_key,
+            quorum_vvec_hash,
+            quorum_sig,
+            sig,
+        })
+    }
+}
+
+/// A Quorum Commitment Payload used in a Quorum Commitment Special Transaction.
+/// This is used in the mining phase as described in DIP 6:
+/// [dip-0006.md#7-mining-phase](https://github.com/dashpay/dips/blob/master/dip-0006.md#7-mining-phase).
+///
+/// Miners take the best final commitment for a DKG session and mine it into a block.
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct QuorumCommitmentPayload {
+    version: u16,
+    height: u32,
+    finalization_commitment: QuorumFinalizationCommitment,
+}
+
+impl QuorumCommitmentPayload {
+    /// The size of the payload in bytes.
+    pub fn size(&self) -> usize {
+        2 + 4 + self.finalization_commitment.size()
+    }
+}
+
+impl Encodable for QuorumCommitmentPayload {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let mut len = 0;
+        len += self.version.consensus_encode(w)?;
+        len += self.height.consensus_encode(w)?;
+        len += self.finalization_commitment.consensus_encode(w)?;
+        Ok(len)
+    }
+}
+
+impl Decodable for QuorumCommitmentPayload {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let version = u16::consensus_decode(r)?;
+        let height = u32::consensus_decode(r)?;
+        let finalization_commitment = QuorumFinalizationCommitment::consensus_decode(r)?;
+        Ok(QuorumCommitmentPayload {
+            version,
+            height,
+            finalization_commitment,
+        })
+    }
+}
+
+
+#[cfg(test)]
+mod tests {
+    use hashes::Hash;
+    use crate::bls_sig_utils::{BLSPublicKey, BLSSignature};
+    use crate::consensus::Encodable;
+    use crate::hash_types::{QuorumHash, QuorumVVecHash};
+    use crate::transaction::special_transaction::quorum_commitment::{QuorumCommitmentPayload, QuorumFinalizationCommitment};
+
+    #[test]
+    fn size() {
+        let want = 325;
+        let payload = QuorumCommitmentPayload {
+            version: 0,
+            height: 0,
+            finalization_commitment: QuorumFinalizationCommitment {
+                version: 0,
+                llmq_type: 0,
+                quorum_hash: QuorumHash::all_zeros(),
+                signers: vec![1, 2, 3, 4, 5],
+                valid_members: vec![6, 7, 8, 9, 0],
+                quorum_public_key: BLSPublicKey::from([0; 48]),
+                quorum_vvec_hash: QuorumVVecHash::all_zeros(),
+                quorum_sig: BLSSignature::from([0; 96]),
+                sig: BLSSignature::from([0; 96]),
+            },
+        };
+        let actual = payload.consensus_encode(&mut Vec::new()).unwrap();
+        assert_eq!(payload.size(), want);
+        assert_eq!(actual, want);
+    }
+}
diff --git a/src/blockdata/transaction/txin.rs b/dash/src/blockdata/transaction/txin.rs
similarity index 73%
rename from src/blockdata/transaction/txin.rs
rename to dash/src/blockdata/transaction/txin.rs
index 305b3707f..5c94605db 100644
--- a/src/blockdata/transaction/txin.rs
+++ b/dash/src/blockdata/transaction/txin.rs
@@ -20,20 +20,22 @@
 //! A TxIn is an input to a transaction.
 //!
 
-use io;
-use blockdata::transaction::outpoint::OutPoint;
-use consensus::{Decodable, Encodable, encode};
-use ::{Script, Witness};
+use crate::io;
+use crate::blockdata::script::ScriptBuf;
+use crate::consensus::{Decodable, Encodable, encode};
+use crate::{Witness};
+use crate::transaction::outpoint::OutPoint;
 
 /// A transaction input, which defines old coins to be consumed
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct TxIn {
     /// The reference to the previous output that is being used an an input.
     pub previous_output: OutPoint,
     /// The script which pushes values on the stack which will cause
     /// the referenced output's script to be accepted.
-    pub script_sig: Script,
+    pub script_sig: ScriptBuf,
     /// The sequence number, which suggests to miners which of two
     /// conflicting transactions should be preferred, or 0xFFFFFFFF
     /// to ignore this feature. This is generally never used since
@@ -51,28 +53,31 @@ impl Default for TxIn {
     fn default() -> TxIn {
         TxIn {
             previous_output: OutPoint::default(),
-            script_sig: Script::new(),
-            sequence: core::u32::MAX,
+            script_sig: ScriptBuf::new(),
+            sequence: u32::MAX,
             witness: Witness::default(),
         }
     }
 }
 
 impl Encodable for TxIn {
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
         let mut len = 0;
-        len += self.previous_output.consensus_encode(&mut s)?;
-        len += self.script_sig.consensus_encode(&mut s)?;
-        len += self.sequence.consensus_encode(s)?;
+        len += self.previous_output.consensus_encode(w)?;
+        len += self.script_sig.consensus_encode(w)?;
+        len += self.sequence.consensus_encode(w)?;
         Ok(len)
     }
 }
 impl Decodable for TxIn {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
+    #[inline]
+    fn consensus_decode_from_finite_reader<R: io::Read + ?Sized>(
+        r: &mut R,
+    ) -> Result<Self, encode::Error> {
         Ok(TxIn {
-            previous_output: Decodable::consensus_decode(&mut d)?,
-            script_sig: Decodable::consensus_decode(&mut d)?,
-            sequence: Decodable::consensus_decode(d)?,
+            previous_output: Decodable::consensus_decode_from_finite_reader(r)?,
+            script_sig: Decodable::consensus_decode_from_finite_reader(r)?,
+            sequence: Decodable::consensus_decode_from_finite_reader(r)?,
             witness: Witness::default(),
         })
     }
@@ -81,7 +86,7 @@ impl Decodable for TxIn {
 #[cfg(test)]
 mod tests {
     use hashes::hex::FromHex;
-    use consensus::deserialize;
+    use crate::consensus::encode::deserialize;
     use super::*;
 
     #[test]
@@ -94,7 +99,7 @@ mod tests {
     fn test_txin_default() {
         let txin = TxIn::default();
         assert_eq!(txin.previous_output, OutPoint::default());
-        assert_eq!(txin.script_sig, Script::new());
+        assert_eq!(txin.script_sig, ScriptBuf::new());
         assert_eq!(txin.sequence, 0xFFFFFFFF);
         assert_eq!(txin.previous_output, OutPoint::default());
         assert_eq!(txin.witness.len(), 0 as usize);
diff --git a/src/blockdata/transaction/txout.rs b/dash/src/blockdata/transaction/txout.rs
similarity index 71%
rename from src/blockdata/transaction/txout.rs
rename to dash/src/blockdata/transaction/txout.rs
index ff60272e0..5e9080888 100644
--- a/src/blockdata/transaction/txout.rs
+++ b/dash/src/blockdata/transaction/txout.rs
@@ -20,32 +20,38 @@
 //! A TxOut is an output of a transaction.
 //!
 
-use ::{PubkeyHash, Script};
-use ::{Address, ScriptHash};
+use crate::{PubkeyHash, ScriptBuf, VarInt};
+use crate::{Address, ScriptHash};
+use crate::internal_macros::impl_consensus_encoding;
 
 /// A transaction output, which defines new coins to be created from old ones.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct TxOut {
     /// The value of the output, in satoshis.
     pub value: u64,
     /// The script which must be satisfied for the output to be spent.
-    pub script_pubkey: Script
+    pub script_pubkey: ScriptBuf,
 }
 
+// This is used as a "null txout" in consensus signing code.
 // This is used as a "null txout" in consensus signing code.
 impl Default for TxOut {
-    fn default() -> TxOut {
-        TxOut { value: 0xffffffffffffffff, script_pubkey: Script::new() }
-    }
+    fn default() -> TxOut { TxOut { value: 0xffffffffffffffff, script_pubkey: ScriptBuf::new() } }
 }
 
 impl TxOut {
+    ///
+    pub fn size(&self) -> usize {
+        8 + VarInt(self.script_pubkey.len() as u64).len() + self.script_pubkey.len()
+    }
+
     /// Convenience method to get an output from an address
     pub fn new_from_address(value: u64, address: &Address) -> Self {
         TxOut {
             value,
-            script_pubkey: address.script_pubkey()
+            script_pubkey: address.script_pubkey(),
         }
     }
 
@@ -53,7 +59,7 @@ impl TxOut {
     pub fn new_from_p2pkh(value: u64, pubkey_hash: &PubkeyHash) -> Self {
         TxOut {
             value,
-            script_pubkey: Script::new_p2pkh(pubkey_hash)
+            script_pubkey: ScriptBuf::new_p2pkh(pubkey_hash),
         }
     }
 
@@ -61,7 +67,7 @@ impl TxOut {
     pub fn new_from_p2sh(value: u64, script_hash: &ScriptHash) -> Self {
         TxOut {
             value,
-            script_pubkey: Script::new_p2sh(script_hash)
+            script_pubkey: ScriptBuf::new_p2sh(script_hash),
         }
     }
 }
diff --git a/dash/src/blockdata/weight.rs b/dash/src/blockdata/weight.rs
new file mode 100644
index 000000000..7e418824d
--- /dev/null
+++ b/dash/src/blockdata/weight.rs
@@ -0,0 +1,274 @@
+//! Implements `Weight` and associated features.
+
+use core::fmt;
+use core::ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, Sub, SubAssign};
+
+use crate::prelude::*;
+
+/// Represents block weight - the weight of a transaction or block.
+///
+/// This is an integer newtype representing weigth in `wu`. It provides protection against mixing
+/// up the types as well as basic formatting features.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+#[cfg_attr(feature = "serde", serde(transparent))]
+pub struct Weight(u64);
+
+impl Weight {
+    /// 0 wu.
+    ///
+    /// Equivalent to [`MIN`](Self::MIN), may better express intent in some contexts.
+    pub const ZERO: Weight = Weight(0);
+
+    /// Minimum possible value (0 wu).
+    ///
+    /// Equivalent to [`ZERO`](Self::ZERO), may better express intent in some contexts.
+    pub const MIN: Weight = Weight(u64::min_value());
+
+    /// Maximum possible value.
+    pub const MAX: Weight = Weight(u64::max_value());
+
+    /// Directly constructs `Weight` from weight units.
+    pub const fn from_wu(wu: u64) -> Self { Weight(wu) }
+
+    /// Constructs `Weight` from kilo weight units returning `None` if overflow occurred.
+    pub fn from_kwu(wu: u64) -> Option<Self> { wu.checked_mul(1000).map(Weight) }
+
+    /// Constructs `Weight` from virtual bytes.
+    ///
+    /// # Errors
+    ///
+    /// Returns `None` on overflow.
+    pub fn from_vb(vb: u64) -> Option<Self> { vb.checked_mul(4).map(Weight::from_wu) }
+
+    /// Constructs `Weight` from virtual bytes without overflow check.
+    pub const fn from_vb_unchecked(vb: u64) -> Self { Weight::from_wu(vb * 4) }
+
+    /// Constructs `Weight` from witness size.
+    pub const fn from_witness_data_size(witness_size: u64) -> Self { Weight(witness_size) }
+
+    /// Constructs `Weight` from non-witness size.
+    pub const fn from_non_witness_data_size(non_witness_size: u64) -> Self {
+        Weight(non_witness_size * 4)
+    }
+
+    /// Returns raw weight units.
+    ///
+    /// Can be used instead of `into()` to avoid inference issues.
+    pub const fn to_wu(self) -> u64 { self.0 }
+
+    /// Converts to kilo weight units rounding down.
+    pub const fn to_kwu_floor(self) -> u64 { self.0 / 1000 }
+
+    /// Converts to vB rounding down.
+    pub const fn to_vbytes_floor(self) -> u64 { self.0 / 4 }
+
+    /// Converts to vB rounding up.
+    pub const fn to_vbytes_ceil(self) -> u64 { (self.0 + 3) / 4 }
+
+    /// Checked addition.
+    ///
+    /// Computes `self + rhs` returning `None` if overflow occurred.
+    pub fn checked_add(self, rhs: Self) -> Option<Self> { self.0.checked_add(rhs.0).map(Self) }
+
+    /// Checked subtraction.
+    ///
+    /// Computes `self - rhs` returning `None` if overflow occurred.
+    pub fn checked_sub(self, rhs: Self) -> Option<Self> { self.0.checked_sub(rhs.0).map(Self) }
+
+    /// Checked multiplication.
+    ///
+    /// Computes `self * rhs` returning `None` if overflow occurred.
+    pub fn checked_mul(self, rhs: u64) -> Option<Self> { self.0.checked_mul(rhs).map(Self) }
+
+    /// Checked division.
+    ///
+    /// Computes `self / rhs` returning `None` if `rhs == 0`.
+    pub fn checked_div(self, rhs: u64) -> Option<Self> { self.0.checked_div(rhs).map(Self) }
+}
+
+/// Alternative will display the unit.
+impl fmt::Display for Weight {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        if f.alternate() {
+            write!(f, "{} wu", self.0)
+        } else {
+            fmt::Display::fmt(&self.0, f)
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn weight_constructor_test() {
+        assert_eq!(Weight::ZERO, Weight::from_wu(0));
+    }
+
+    #[test]
+    fn kilo_weight_constructor_test() {
+        assert_eq!(Weight(1_000), Weight::from_kwu(1).expect("expected weight unit"));
+    }
+
+    #[test]
+    #[should_panic]
+    fn kilo_weight_constructor_panic_test() {
+        Weight::from_kwu(u64::max_value()).expect("expected weight unit");
+    }
+
+    #[test]
+    fn from_vb_test() {
+        let vb = Weight::from_vb(1).expect("expected weight unit");
+        assert_eq!(Weight(4), vb);
+
+        let vb = Weight::from_vb(u64::max_value());
+        assert_eq!(None, vb);
+    }
+
+    #[test]
+    fn from_vb_unchecked_test() {
+        let vb = Weight::from_vb_unchecked(1);
+        assert_eq!(Weight(4), vb);
+    }
+
+    #[test]
+    #[should_panic]
+    fn from_vb_unchecked_panic_test() { Weight::from_vb_unchecked(u64::max_value()); }
+
+    #[test]
+    fn from_witness_data_size_test() {
+        let witness_data_size = 1;
+        assert_eq!(Weight(witness_data_size), Weight::from_witness_data_size(witness_data_size));
+    }
+
+    #[test]
+    fn from_non_witness_data_size_test() {
+        assert_eq!(Weight(4), Weight::from_non_witness_data_size(1));
+    }
+
+    #[test]
+    fn to_kwu_floor_test() {
+        assert_eq!(1, Weight(1_000).to_kwu_floor());
+    }
+
+    #[test]
+    fn to_vb_floor_test() {
+        assert_eq!(1, Weight(4).to_vbytes_floor());
+        assert_eq!(1, Weight(5).to_vbytes_floor());
+    }
+
+    #[test]
+    fn to_vb_ceil_test() {
+        assert_eq!(1, Weight(4).to_vbytes_ceil());
+        assert_eq!(2, Weight(5).to_vbytes_ceil());
+    }
+
+    #[test]
+    fn checked_add_test() {
+        let result = Weight(1).checked_add(Weight(1)).expect("expected weight unit");
+        assert_eq!(Weight(2), result);
+
+        let result = Weight::MAX.checked_add(Weight(1));
+        assert_eq!(None, result);
+    }
+
+    #[test]
+    fn checked_sub_test() {
+        let result = Weight(1).checked_sub(Weight(1)).expect("expected weight unit");
+        assert_eq!(Weight::ZERO, result);
+
+        let result = Weight::MIN.checked_sub(Weight(1));
+        assert_eq!(None, result);
+    }
+
+    #[test]
+    fn checked_mul_test() {
+        let result = Weight(2).checked_mul(2).expect("expected weight unit");
+        assert_eq!(Weight(4), result);
+
+        let result = Weight::MAX.checked_mul(2);
+        assert_eq!(None, result);
+    }
+
+    #[test]
+    fn checked_div_test() {
+        let result = Weight(2).checked_div(2).expect("expected weight unit");
+        assert_eq!(Weight(1), result);
+
+        let result = Weight(2).checked_div(0);
+        assert_eq!(None, result);
+    }
+}
+
+impl From<Weight> for u64 {
+    fn from(value: Weight) -> Self { value.to_wu() }
+}
+
+impl Add for Weight {
+    type Output = Weight;
+
+    fn add(self, rhs: Weight) -> Self::Output { Weight(self.0 + rhs.0) }
+}
+
+impl AddAssign for Weight {
+    fn add_assign(&mut self, rhs: Self) { self.0 += rhs.0 }
+}
+
+impl Sub for Weight {
+    type Output = Weight;
+
+    fn sub(self, rhs: Weight) -> Self::Output { Weight(self.0 - rhs.0) }
+}
+
+impl SubAssign for Weight {
+    fn sub_assign(&mut self, rhs: Self) { self.0 -= rhs.0 }
+}
+
+impl Mul<u64> for Weight {
+    type Output = Weight;
+
+    fn mul(self, rhs: u64) -> Self::Output { Weight(self.0 * rhs) }
+}
+
+impl Mul<Weight> for u64 {
+    type Output = Weight;
+
+    fn mul(self, rhs: Weight) -> Self::Output { Weight(self * rhs.0) }
+}
+
+impl MulAssign<u64> for Weight {
+    fn mul_assign(&mut self, rhs: u64) { self.0 *= rhs }
+}
+
+impl Div<u64> for Weight {
+    type Output = Weight;
+
+    fn div(self, rhs: u64) -> Self::Output { Weight(self.0 / rhs) }
+}
+
+impl DivAssign<u64> for Weight {
+    fn div_assign(&mut self, rhs: u64) { self.0 /= rhs }
+}
+
+impl core::iter::Sum for Weight {
+    fn sum<I>(iter: I) -> Self
+        where
+            I: Iterator<Item = Self>,
+    {
+        Weight(iter.map(Weight::to_wu).sum())
+    }
+}
+
+impl<'a> core::iter::Sum<&'a Weight> for Weight {
+    fn sum<I>(iter: I) -> Self
+        where
+            I: Iterator<Item = &'a Weight>,
+    {
+        iter.cloned().sum()
+    }
+}
+
+crate::parse::impl_parse_str_from_int_infallible!(Weight, u64, from_wu);
diff --git a/dash/src/blockdata/witness.rs b/dash/src/blockdata/witness.rs
new file mode 100644
index 000000000..94474d004
--- /dev/null
+++ b/dash/src/blockdata/witness.rs
@@ -0,0 +1,710 @@
+// SPDX-License-Identifier: CC0-1.0
+
+//! Witness
+//!
+//! This module contains the [`Witness`] struct and related methods to operate on it
+//!
+
+use core::convert::TryInto;
+use core::ops::Index;
+
+use secp256k1::ecdsa;
+
+use crate::consensus::encode::{Error, MAX_VEC_SIZE};
+use crate::consensus::{Decodable, Encodable, WriteExt};
+use crate::io::{self, Read, Write};
+use crate::prelude::*;
+use crate::sighash::EcdsaSighashType;
+use crate::taproot::TAPROOT_ANNEX_PREFIX;
+use crate::{Script, VarInt};
+
+/// The Witness is the data used to unlock dash since the [segwit upgrade].
+///
+/// Can be logically seen as an array of bytestrings, i.e. `Vec<Vec<u8>>`, and it is serialized on the wire
+/// in that format. You can convert between this type and `Vec<Vec<u8>>` by using [`Witness::from_slice`]
+/// and [`Witness::to_vec`].
+///
+/// For serialization and deserialization performance it is stored internally as a single `Vec`,
+/// saving some allocations.
+///
+/// [segwit upgrade]: <https://github.com/bitcoin/bips/blob/master/bip-0143.mediawiki>
+#[derive(Clone, Default, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
+pub struct Witness {
+    /// Contains the witness `Vec<Vec<u8>>` serialization without the initial varint indicating the
+    /// number of elements (which is stored in `witness_elements`).
+    content: Vec<u8>,
+
+    /// The number of elements in the witness.
+    ///
+    /// Stored separately (instead of as a VarInt in the initial part of content) so that methods
+    /// like [`Witness::push`] don't have to shift the entire array.
+    witness_elements: usize,
+
+    /// This is the valid index pointing to the beginning of the index area. This area is 4 *
+    /// stack_size bytes at the end of the content vector which stores the indices of each item.
+    indices_start: usize,
+}
+
+/// An iterator returning individual witness elements.
+pub struct Iter<'a> {
+    inner: &'a [u8],
+    indices_start: usize,
+    current_index: usize,
+}
+
+impl Decodable for Witness {
+    fn consensus_decode<R: Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        let witness_elements = VarInt::consensus_decode(r)?.0 as usize;
+        // Minimum size of witness element is 1 byte, so if the count is
+        // greater than MAX_VEC_SIZE we must return an error.
+        if witness_elements > MAX_VEC_SIZE {
+            return Err(self::Error::OversizedVectorAllocation {
+                requested: witness_elements,
+                max: MAX_VEC_SIZE,
+            });
+        }
+        if witness_elements == 0 {
+            Ok(Witness::default())
+        } else {
+            // Leave space at the head for element positions.
+            // We will rotate them to the end of the Vec later.
+            let witness_index_space = witness_elements * 4;
+            let mut cursor = witness_index_space;
+
+            // this number should be determined as high enough to cover most witness, and low enough
+            // to avoid wasting space without reallocating
+            let mut content = vec![0u8; cursor + 128];
+
+            for i in 0..witness_elements {
+                let element_size_varint = VarInt::consensus_decode(r)?;
+                let element_size_varint_len = element_size_varint.len();
+                let element_size = element_size_varint.0 as usize;
+                let required_len = cursor
+                    .checked_add(element_size)
+                    .ok_or(self::Error::OversizedVectorAllocation {
+                        requested: usize::max_value(),
+                        max: MAX_VEC_SIZE,
+                    })?
+                    .checked_add(element_size_varint_len)
+                    .ok_or(self::Error::OversizedVectorAllocation {
+                        requested: usize::max_value(),
+                        max: MAX_VEC_SIZE,
+                    })?;
+
+                if required_len > MAX_VEC_SIZE + witness_index_space {
+                    return Err(self::Error::OversizedVectorAllocation {
+                        requested: required_len,
+                        max: MAX_VEC_SIZE,
+                    });
+                }
+
+                // We will do content.rotate_left(witness_index_space) later.
+                // Encode the position's value AFTER we rotate left.
+                encode_cursor(&mut content, 0, i, cursor - witness_index_space);
+
+                resize_if_needed(&mut content, required_len);
+                element_size_varint.consensus_encode(
+                    &mut &mut content[cursor..cursor + element_size_varint_len],
+                )?;
+                cursor += element_size_varint_len;
+                r.read_exact(&mut content[cursor..cursor + element_size])?;
+                cursor += element_size;
+            }
+            content.truncate(cursor);
+            // Index space is now at the end of the Vec
+            content.rotate_left(witness_index_space);
+            Ok(Witness { content, witness_elements, indices_start: cursor - witness_index_space })
+        }
+    }
+}
+
+/// Correctness Requirements: value must always fit within u32
+#[inline]
+fn encode_cursor(bytes: &mut [u8], start_of_indices: usize, index: usize, value: usize) {
+    let start = start_of_indices + index * 4;
+    let end = start + 4;
+    bytes[start..end]
+        .copy_from_slice(&u32::to_ne_bytes(value.try_into().expect("Larger than u32")));
+}
+
+#[inline]
+fn decode_cursor(bytes: &[u8], start_of_indices: usize, index: usize) -> Option<usize> {
+    let start = start_of_indices + index * 4;
+    let end = start + 4;
+    if end > bytes.len() {
+        None
+    } else {
+        Some(u32::from_ne_bytes(bytes[start..end].try_into().expect("is u32 size")) as usize)
+    }
+}
+
+fn resize_if_needed(vec: &mut Vec<u8>, required_len: usize) {
+    if required_len >= vec.len() {
+        let mut new_len = vec.len().max(1);
+        while new_len <= required_len {
+            new_len *= 2;
+        }
+        vec.resize(new_len, 0);
+    }
+}
+
+impl Encodable for Witness {
+    fn consensus_encode<W: Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let len = VarInt(self.witness_elements as u64);
+        len.consensus_encode(w)?;
+        let content_with_indices_len = self.content.len();
+        let indices_size = self.witness_elements * 4;
+        let content_len = content_with_indices_len - indices_size;
+        w.emit_slice(&self.content[..content_len])?;
+        Ok(content_len + len.len())
+    }
+}
+
+impl Witness {
+    /// Creates a new empty [`Witness`].
+    pub fn new() -> Self { Witness::default() }
+
+    /// Creates [`Witness`] object from an array of byte-arrays
+    #[deprecated(since = "0.30.0", note = "use `Witness::from_slice()` instead")]
+    pub fn from_vec(vec: Vec<Vec<u8>>) -> Self { Witness::from_slice(&vec) }
+
+    /// Creates a [`Witness`] object from a slice of bytes slices where each slice is a witness item.
+    pub fn from_slice<T: AsRef<[u8]>>(slice: &[T]) -> Self {
+        let witness_elements = slice.len();
+        let index_size = witness_elements * 4;
+        let content_size = slice
+            .iter()
+            .map(|elem| elem.as_ref().len() + VarInt(elem.as_ref().len() as u64).len())
+            .sum();
+
+        let mut content = vec![0u8; content_size + index_size];
+        let mut cursor = 0usize;
+        for (i, elem) in slice.iter().enumerate() {
+            encode_cursor(&mut content, content_size, i, cursor);
+            let elem_len_varint = VarInt(elem.as_ref().len() as u64);
+            elem_len_varint
+                .consensus_encode(&mut &mut content[cursor..cursor + elem_len_varint.len()])
+                .expect("writers on vec don't errors, space granted by content_size");
+            cursor += elem_len_varint.len();
+            content[cursor..cursor + elem.as_ref().len()].copy_from_slice(elem.as_ref());
+            cursor += elem.as_ref().len();
+        }
+
+        Witness { witness_elements, content, indices_start: content_size }
+    }
+
+    /// Convenience method to create an array of byte-arrays from this witness.
+    pub fn to_vec(&self) -> Vec<Vec<u8>> { self.iter().map(|s| s.to_vec()).collect() }
+
+    /// Returns `true` if the witness contains no element.
+    pub fn is_empty(&self) -> bool { self.witness_elements == 0 }
+
+    /// Returns a struct implementing [`Iterator`].
+    pub fn iter(&self) -> Iter {
+        Iter { inner: self.content.as_slice(), indices_start: self.indices_start, current_index: 0 }
+    }
+
+    /// Returns the number of elements this witness holds.
+    pub fn len(&self) -> usize { self.witness_elements }
+
+    /// Returns the bytes required when this Witness is consensus encoded.
+    pub fn serialized_len(&self) -> usize {
+        self.iter().map(|el| VarInt(el.len() as u64).len() + el.len()).sum::<usize>()
+            + VarInt(self.witness_elements as u64).len()
+    }
+
+    /// Clear the witness.
+    pub fn clear(&mut self) {
+        self.content.clear();
+        self.witness_elements = 0;
+        self.indices_start = 0;
+    }
+
+    /// Push a new element on the witness, requires an allocation.
+    pub fn push<T: AsRef<[u8]>>(&mut self, new_element: T) {
+        self.push_slice(new_element.as_ref());
+    }
+
+    /// Push a new element slice onto the witness stack.
+    fn push_slice(&mut self, new_element: &[u8]) {
+        self.witness_elements += 1;
+        let previous_content_end = self.indices_start;
+        let element_len_varint = VarInt(new_element.len() as u64);
+        let current_content_len = self.content.len();
+        let new_item_total_len = element_len_varint.len() + new_element.len();
+        self.content.resize(current_content_len + new_item_total_len + 4, 0);
+
+        self.content[previous_content_end..].rotate_right(new_item_total_len);
+        self.indices_start += new_item_total_len;
+        encode_cursor(
+            &mut self.content,
+            self.indices_start,
+            self.witness_elements - 1,
+            previous_content_end,
+        );
+
+        let end_varint = previous_content_end + element_len_varint.len();
+        element_len_varint
+            .consensus_encode(&mut &mut self.content[previous_content_end..end_varint])
+            .expect("writers on vec don't error, space granted through previous resize");
+        self.content[end_varint..end_varint + new_element.len()].copy_from_slice(new_element);
+    }
+
+    /// Pushes a DER-encoded ECDSA signature with a signature hash type as a new element on the
+    /// witness, requires an allocation.
+    pub fn push_bitcoin_signature(
+        &mut self,
+        signature: &ecdsa::SerializedSignature,
+        hash_type: EcdsaSighashType,
+    ) {
+        // Note that a maximal length ECDSA signature is 72 bytes, plus the sighash type makes 73
+        let mut sig = [0; 73];
+        sig[..signature.len()].copy_from_slice(signature);
+        sig[signature.len()] = hash_type as u8;
+        self.push(&sig[..signature.len() + 1]);
+    }
+
+    fn element_at(&self, index: usize) -> Option<&[u8]> {
+        let varint = VarInt::consensus_decode(&mut &self.content[index..]).ok()?;
+        let start = index + varint.len();
+        Some(&self.content[start..start + varint.0 as usize])
+    }
+
+    /// Returns the last element in the witness, if any.
+    pub fn last(&self) -> Option<&[u8]> {
+        if self.witness_elements == 0 {
+            None
+        } else {
+            self.nth(self.witness_elements - 1)
+        }
+    }
+
+    /// Returns the second-to-last element in the witness, if any.
+    pub fn second_to_last(&self) -> Option<&[u8]> {
+        if self.witness_elements <= 1 {
+            None
+        } else {
+            self.nth(self.witness_elements - 2)
+        }
+    }
+
+    /// Return the nth element in the witness, if any
+    pub fn nth(&self, index: usize) -> Option<&[u8]> {
+        let pos = decode_cursor(&self.content, self.indices_start, index)?;
+        self.element_at(pos)
+    }
+
+    /// Get Tapscript following BIP341 rules regarding accounting for an annex.
+    ///
+    /// This does not guarantee that this represents a P2TR [`Witness`]. It
+    /// merely gets the second to last or third to last element depending on
+    /// the first byte of the last element being equal to 0x50. See
+    /// [Script::is_v1_p2tr](crate::blockdata::script::Script::is_v1_p2tr) to
+    /// check whether this is actually a Taproot witness.
+    pub fn tapscript(&self) -> Option<&Script> {
+        let len = self.len();
+        self.last()
+            .map(|last_elem| {
+                // From BIP341:
+                // If there are at least two witness elements, and the first byte of
+                // the last element is 0x50, this last element is called annex a
+                // and is removed from the witness stack.
+                if len >= 2 && last_elem.first() == Some(&TAPROOT_ANNEX_PREFIX) {
+                    // account for the extra item removed from the end
+                    3
+                } else {
+                    // otherwise script is 2nd from last
+                    2
+                }
+            })
+            .filter(|&script_pos_from_last| len >= script_pos_from_last)
+            .and_then(|script_pos_from_last| self.nth(len - script_pos_from_last))
+            .map(Script::from_bytes)
+    }
+}
+
+impl Index<usize> for Witness {
+    type Output = [u8];
+
+    fn index(&self, index: usize) -> &Self::Output { self.nth(index).expect("Out of Bounds") }
+}
+
+impl<'a> Iterator for Iter<'a> {
+    type Item = &'a [u8];
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let index = decode_cursor(self.inner, self.indices_start, self.current_index)?;
+        let varint = VarInt::consensus_decode(&mut &self.inner[index..]).ok()?;
+        let start = index + varint.len();
+        let end = start + varint.0 as usize;
+        let slice = &self.inner[start..end];
+        self.current_index += 1;
+        Some(slice)
+    }
+
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        let total_count = (self.inner.len() - self.indices_start) / 4;
+        let remaining = total_count - self.current_index;
+        (remaining, Some(remaining))
+    }
+}
+
+impl<'a> ExactSizeIterator for Iter<'a> {}
+
+impl<'a> IntoIterator for &'a Witness {
+    type IntoIter = Iter<'a>;
+    type Item = &'a [u8];
+
+    fn into_iter(self) -> Self::IntoIter { self.iter() }
+}
+
+// Serde keep backward compatibility with old Vec<Vec<u8>> format
+#[cfg(feature = "serde")]
+impl serde::Serialize for Witness {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        use serde::ser::SerializeSeq;
+
+        let human_readable = serializer.is_human_readable();
+        let mut seq = serializer.serialize_seq(Some(self.witness_elements))?;
+
+        for elem in self.iter() {
+            if human_readable {
+                seq.serialize_element(&crate::serde_utils::SerializeBytesAsHex(elem))?;
+            } else {
+                seq.serialize_element(&elem)?;
+            }
+        }
+        seq.end()
+    }
+}
+
+#[cfg(feature = "serde")]
+impl<'de> serde::Deserialize<'de> for Witness {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        struct Visitor; // Human-readable visitor.
+        impl<'de> serde::de::Visitor<'de> for Visitor {
+            type Value = Witness;
+
+            fn expecting(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                write!(f, "a sequence of hex arrays")
+            }
+
+            fn visit_seq<A: serde::de::SeqAccess<'de>>(
+                self,
+                mut a: A,
+            ) -> Result<Self::Value, A::Error> {
+                use hashes::hex::Error::*;
+                use hashes::hex::FromHex;
+                use serde::de::{self, Unexpected};
+
+                let mut ret = match a.size_hint() {
+                    Some(len) => Vec::with_capacity(len),
+                    None => Vec::new(),
+                };
+
+                while let Some(elem) = a.next_element::<String>()? {
+                    let vec = Vec::<u8>::from_hex(&elem).map_err(|e| match e {
+                        InvalidChar(b) => match core::char::from_u32(b.into()) {
+                            Some(c) => de::Error::invalid_value(
+                                Unexpected::Char(c),
+                                &"a valid hex character",
+                            ),
+                            None => de::Error::invalid_value(
+                                Unexpected::Unsigned(b.into()),
+                                &"a valid hex character",
+                            ),
+                        },
+                        OddLengthString(len) =>
+                            de::Error::invalid_length(len, &"an even length string"),
+                        InvalidLength(expected, got) => {
+                            let exp = format!("expected length: {}", expected);
+                            de::Error::invalid_length(got, &exp.as_str())
+                        }
+                    })?;
+                    ret.push(vec);
+                }
+                Ok(Witness::from_slice(&ret))
+            }
+        }
+
+        if deserializer.is_human_readable() {
+            deserializer.deserialize_seq(Visitor)
+        } else {
+            let vec: Vec<Vec<u8>> = serde::Deserialize::deserialize(deserializer)?;
+            Ok(Witness::from_slice(&vec))
+        }
+    }
+}
+
+impl From<Vec<Vec<u8>>> for Witness {
+    fn from(vec: Vec<Vec<u8>>) -> Self { Witness::from_slice(&vec) }
+}
+
+impl From<&[&[u8]]> for Witness {
+    fn from(slice: &[&[u8]]) -> Self { Witness::from_slice(slice) }
+}
+
+impl From<&[Vec<u8>]> for Witness {
+    fn from(slice: &[Vec<u8>]) -> Self { Witness::from_slice(slice) }
+}
+
+impl From<Vec<&[u8]>> for Witness {
+    fn from(vec: Vec<&[u8]>) -> Self { Witness::from_slice(&vec) }
+}
+
+#[cfg(test)]
+mod test {
+    use secp256k1::ecdsa;
+
+    use super::*;
+    use crate::consensus::{deserialize, serialize};
+    use crate::internal_macros::hex;
+    use crate::Transaction;
+
+    fn append_u32_vec(mut v: Vec<u8>, n: &[u32]) -> Vec<u8> {
+        for &num in n {
+            v.extend_from_slice(&num.to_ne_bytes());
+        }
+        v
+    }
+
+    #[test]
+    fn test_push() {
+        let mut witness = Witness::default();
+        assert_eq!(witness.last(), None);
+        assert_eq!(witness.second_to_last(), None);
+        assert_eq!(witness.nth(0), None);
+        assert_eq!(witness.nth(1), None);
+        assert_eq!(witness.nth(2), None);
+        assert_eq!(witness.nth(3), None);
+        witness.push(&vec![0u8]);
+        let expected = Witness {
+            witness_elements: 1,
+            content: append_u32_vec(vec![1u8, 0], &[0]),
+            indices_start: 2,
+        };
+        assert_eq!(witness, expected);
+        assert_eq!(witness.last(), Some(&[0u8][..]));
+        assert_eq!(witness.second_to_last(), None);
+        assert_eq!(witness.nth(0), Some(&[0u8][..]));
+        assert_eq!(witness.nth(1), None);
+        assert_eq!(witness.nth(2), None);
+        assert_eq!(witness.nth(3), None);
+        assert_eq!(&witness[0], &[0u8][..]);
+        witness.push(&vec![2u8, 3u8]);
+        let expected = Witness {
+            witness_elements: 2,
+            content: append_u32_vec(vec![1u8, 0, 2, 2, 3], &[0, 2]),
+            indices_start: 5,
+        };
+        assert_eq!(witness, expected);
+        assert_eq!(witness.last(), Some(&[2u8, 3u8][..]));
+        assert_eq!(witness.second_to_last(), Some(&[0u8][..]));
+        assert_eq!(witness.nth(0), Some(&[0u8][..]));
+        assert_eq!(witness.nth(1), Some(&[2u8, 3u8][..]));
+        assert_eq!(witness.nth(2), None);
+        assert_eq!(witness.nth(3), None);
+        assert_eq!(&witness[0], &[0u8][..]);
+        assert_eq!(&witness[1], &[2u8, 3u8][..]);
+        witness.push(&vec![4u8, 5u8]);
+        let expected = Witness {
+            witness_elements: 3,
+            content: append_u32_vec(vec![1u8, 0, 2, 2, 3, 2, 4, 5], &[0, 2, 5]),
+            indices_start: 8,
+        };
+        assert_eq!(witness, expected);
+        assert_eq!(witness.last(), Some(&[4u8, 5u8][..]));
+        assert_eq!(witness.second_to_last(), Some(&[2u8, 3u8][..]));
+        assert_eq!(witness.nth(0), Some(&[0u8][..]));
+        assert_eq!(witness.nth(1), Some(&[2u8, 3u8][..]));
+        assert_eq!(witness.nth(2), Some(&[4u8, 5u8][..]));
+        assert_eq!(witness.nth(3), None);
+        assert_eq!(&witness[0], &[0u8][..]);
+        assert_eq!(&witness[1], &[2u8, 3u8][..]);
+        assert_eq!(&witness[2], &[4u8, 5u8][..]);
+    }
+
+    #[test]
+    fn test_iter_len() {
+        let mut witness = Witness::default();
+        for i in 0..5 {
+            assert_eq!(witness.iter().len(), i);
+            witness.push(&vec![0u8]);
+        }
+        let mut iter = witness.iter();
+        for i in (0..=5).rev() {
+            assert_eq!(iter.len(), i);
+            iter.next();
+        }
+    }
+
+    #[test]
+    fn test_push_ecdsa_sig() {
+        // The very first signature in block 734,958
+        let sig_bytes =
+            hex!("304402207c800d698f4b0298c5aac830b822f011bb02df41eb114ade9a6702f364d5e39c0220366900d2a60cab903e77ef7dd415d46509b1f78ac78906e3296f495aa1b1b541");
+        let sig = ecdsa::Signature::from_der(&sig_bytes).unwrap();
+        let mut witness = Witness::default();
+        witness.push_bitcoin_signature(&sig.serialize_der(), EcdsaSighashType::All);
+        let expected_witness = vec![hex!(
+            "304402207c800d698f4b0298c5aac830b822f011bb02df41eb114ade9a6702f364d5e39c0220366900d2a60cab903e77ef7dd415d46509b1f78ac78906e3296f495aa1b1b54101")
+            ];
+        assert_eq!(witness.to_vec(), expected_witness);
+    }
+
+    #[test]
+    fn test_witness() {
+        let w0 = hex!("03d2e15674941bad4a996372cb87e1856d3652606d98562fe39c5e9e7e413f2105");
+        let w1 = hex!("000000");
+        let witness_vec = vec![w0.clone(), w1.clone()];
+        let witness_serialized: Vec<u8> = serialize(&witness_vec);
+        let witness = Witness {
+            content: append_u32_vec(witness_serialized[1..].to_vec(), &[0, 34]),
+            witness_elements: 2,
+            indices_start: 38,
+        };
+        for (i, el) in witness.iter().enumerate() {
+            assert_eq!(witness_vec[i], el);
+        }
+        assert_eq!(witness.last(), Some(&w1[..]));
+        assert_eq!(witness.second_to_last(), Some(&w0[..]));
+        assert_eq!(witness.nth(0), Some(&w0[..]));
+        assert_eq!(witness.nth(1), Some(&w1[..]));
+        assert_eq!(witness.nth(2), None);
+        assert_eq!(&witness[0], &w0[..]);
+        assert_eq!(&witness[1], &w1[..]);
+
+        let w_into = Witness::from_slice(&witness_vec);
+        assert_eq!(w_into, witness);
+
+        assert_eq!(witness_serialized, serialize(&witness));
+    }
+
+    #[test]
+    fn test_get_tapscript() {
+        let tapscript = hex!("deadbeef");
+        let control_block = hex!("02");
+        // annex starting with 0x50 causes the branching logic.
+        let annex = hex!("50");
+
+        let witness_vec = vec![tapscript.clone(), control_block.clone()];
+        let witness_vec_annex = vec![tapscript.clone(), control_block, annex];
+
+        let witness_serialized: Vec<u8> = serialize(&witness_vec);
+        let witness_serialized_annex: Vec<u8> = serialize(&witness_vec_annex);
+
+        let witness = Witness {
+            content: append_u32_vec(witness_serialized[1..].to_vec(), &[0, 5]),
+            witness_elements: 2,
+            indices_start: 7,
+        };
+        let witness_annex = Witness {
+            content: append_u32_vec(witness_serialized_annex[1..].to_vec(), &[0, 5, 7]),
+            witness_elements: 3,
+            indices_start: 9,
+        };
+
+        // With or without annex, the tapscript should be returned.
+        assert_eq!(witness.tapscript(), Some(Script::from_bytes(&tapscript[..])));
+        assert_eq!(witness_annex.tapscript(), Some(Script::from_bytes(&tapscript[..])));
+    }
+
+    #[test]
+    fn test_tx() {
+        const S: &str = "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";
+        let tx_bytes = hex!(S);
+        let tx: Transaction = deserialize(&tx_bytes).unwrap();
+
+        let expected_wit = ["304502210084622878c94f4c356ce49c8e33a063ec90f6ee9c0208540888cfab056cd1fca9022014e8dbfdfa46d318c6887afd92dcfa54510e057565e091d64d2ee3a66488f82c01", "026e181ffb98ebfe5a64c983073398ea4bcd1548e7b971b4c175346a25a1c12e95"];
+        for (i, wit_el) in tx.input[0].witness.iter().enumerate() {
+            assert_eq!(expected_wit[i], wit_el.to_lower_hex_string());
+        }
+        assert_eq!(expected_wit[1], tx.input[0].witness.last().unwrap().to_lower_hex_string());
+        assert_eq!(
+            expected_wit[0],
+            tx.input[0].witness.second_to_last().unwrap().to_lower_hex_string()
+        );
+        assert_eq!(expected_wit[0], tx.input[0].witness.nth(0).unwrap().to_lower_hex_string());
+        assert_eq!(expected_wit[1], tx.input[0].witness.nth(1).unwrap().to_lower_hex_string());
+        assert_eq!(None, tx.input[0].witness.nth(2));
+        assert_eq!(expected_wit[0], tx.input[0].witness[0].to_lower_hex_string());
+        assert_eq!(expected_wit[1], tx.input[0].witness[1].to_lower_hex_string());
+
+        let tx_bytes_back = serialize(&tx);
+        assert_eq!(tx_bytes_back, tx_bytes);
+    }
+
+    #[test]
+    fn fuzz_cases() {
+        let bytes = hex!("26ff0000000000c94ce592cf7a4cbb68eb00ce374300000057cd0000000000000026");
+        assert!(deserialize::<Witness>(&bytes).is_err()); // OversizedVectorAllocation
+
+        let bytes = hex!("24000000ffffffffffffffffffffffff");
+        assert!(deserialize::<Witness>(&bytes).is_err()); // OversizedVectorAllocation
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn test_serde_bincode() {
+        use bincode;
+
+        let old_witness_format = vec![vec![0u8], vec![2]];
+        let new_witness_format = Witness::from_slice(&old_witness_format);
+
+        let old = bincode::serialize(&old_witness_format).unwrap();
+        let new = bincode::serialize(&new_witness_format).unwrap();
+
+        assert_eq!(old, new);
+
+        let back: Witness = bincode::deserialize(&new).unwrap();
+        assert_eq!(new_witness_format, back);
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn test_serde_human() {
+        use serde_json;
+
+        let witness = Witness::from_slice(&[vec![0u8, 123, 75], vec![2u8, 6, 3, 7, 8]]);
+
+        let json = serde_json::to_string(&witness).unwrap();
+
+        assert_eq!(json, r#"["007b4b","0206030708"]"#);
+
+        let back: Witness = serde_json::from_str(&json).unwrap();
+        assert_eq!(witness, back);
+    }
+}
+
+#[cfg(bench)]
+mod benches {
+    use test::{black_box, Bencher};
+
+    use super::Witness;
+
+    #[bench]
+    pub fn bench_big_witness_to_vec(bh: &mut Bencher) {
+        let raw_witness = [[1u8]; 5];
+        let witness = Witness::from_slice(&raw_witness);
+
+        bh.iter(|| {
+            black_box(witness.to_vec());
+        });
+    }
+
+    #[bench]
+    pub fn bench_witness_to_vec(bh: &mut Bencher) {
+        let raw_witness = vec![vec![1u8]; 3];
+        let witness = Witness::from_slice(&raw_witness);
+
+        bh.iter(|| {
+            black_box(witness.to_vec());
+        });
+    }
+}
diff --git a/src/bls_sig_utils.rs b/dash/src/bls_sig_utils.rs
similarity index 64%
rename from src/bls_sig_utils.rs
rename to dash/src/bls_sig_utils.rs
index cf835105a..baf312dc8 100644
--- a/src/bls_sig_utils.rs
+++ b/dash/src/bls_sig_utils.rs
@@ -17,44 +17,79 @@
 //! and signature.
 //!
 
-use core::{fmt};
+use crate::core::fmt;
+use hex::FromHexError;
+use crate::internal_macros::{impl_bytes_newtype};
+use internals::{impl_array_newtype};
+use internals::hex::display::DisplayHex;
+use crate::prelude::String;
 
-impl_array_newtype!(BLSPublicKey, u8, 48);
-impl_bytes_newtype!(BLSPublicKey, 48);
 /// A BLS Public key is 48 bytes in the scheme used for Dash Core
 #[rustversion::attr(since(1.48), derive(PartialEq, Eq, Ord, PartialOrd, Hash))]
-#[derive(Clone)]
-pub struct BLSPublicKey([u8;48]);
+#[derive(Clone, Copy, Debug)]
+pub struct BLSPublicKey([u8; 48]);
 
-impl_array_newtype!(BLSSignature, u8, 96);
-impl_bytes_newtype!(BLSSignature, 96);
+impl_array_newtype!(BLSPublicKey, u8, 48);
+
+impl BLSPublicKey {
+    /// Create a new BLS Public Key from a hex string
+    pub fn from_hex(s: &str) -> Result<BLSPublicKey, FromHexError> {
+        hex::decode(s).map(|v| {
+            let mut payload: [u8; 48] = [0; 48];
+            payload.copy_from_slice(v.as_slice());
+            Self(payload)
+        })
+    }
+
+    /// Convert the BLS Public Key to a hex string
+    pub fn to_hex(&self) -> String {
+        self.0.to_lower_hex_string()
+    }
+}
+
+#[cfg(feature = "serde")]
+crate::serde_utils::serde_string_impl!(BLSPublicKey, "a BLS Public Key");
+
+impl core::str::FromStr for BLSPublicKey {
+    type Err = FromHexError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        BLSPublicKey::from_hex(s)
+    }
+}
+
+impl fmt::Display for BLSPublicKey {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self.to_hex())
+    }
+}
 
 /// A BLS Signature is 96 bytes in the scheme used for Dash Core
 #[rustversion::attr(since(1.48), derive(PartialEq, Eq, Ord, PartialOrd, Hash))]
-#[derive(Clone)]
-pub struct BLSSignature([u8;96]);
+#[derive(Clone, Copy)]
+pub struct BLSSignature([u8; 96]);
 
+impl_array_newtype!(BLSSignature, u8, 96);
+impl_bytes_newtype!(BLSSignature, 96);
 
 macro_rules! impl_elementencode {
     ($element:ident, $len:expr) => {
         impl $crate::consensus::Encodable for $element {
-            fn consensus_encode<S: $crate::io::Write>(&self, mut s: S) -> Result<usize, $crate::io::Error> {
-                s.write(&self.0)
+            fn consensus_encode<W: $crate::io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, $crate::io::Error> {
+                self.0.consensus_encode(w)
             }
         }
 
         impl $crate::consensus::Decodable for $element {
-            fn consensus_decode<D: $crate::io::Read>(mut d: D) -> Result<Self, $crate::consensus::encode::Error> {
+            fn consensus_decode<R: $crate::io::Read + ?Sized>(r: &mut R) -> Result<Self, $crate::consensus::encode::Error> {
                 let mut data :[u8;$len] = [0u8; $len];
-                d.read_exact(&mut data)?;
+                r.read_exact(&mut data)?;
                 Ok($element(data))
             }
         }
-    }
+    };
 }
 
-
-
 #[rustversion::before(1.48)]
 macro_rules! impl_eq_ord_hash {
     ($element:ident, $len:expr) => {
diff --git a/dash/src/consensus/encode.rs b/dash/src/consensus/encode.rs
new file mode 100644
index 000000000..cc9dc2086
--- /dev/null
+++ b/dash/src/consensus/encode.rs
@@ -0,0 +1,1307 @@
+// Rust Dash Library
+// Originally written in 2014 by
+//     Andrew Poelstra <apoelstra@wpsoftware.net>
+//     For Bitcoin
+// Updated for Dash in 2022 by
+//     The Dash Core Developers
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Dash consensus-encodable types.
+//!
+//! This is basically a replacement of the `Encodable` trait which does
+//! normalization of endianness etc., to ensure that the encoding matches
+//! the network consensus encoding.
+//!
+//! Essentially, anything that must go on the _disk_ or _network_ must be
+//! encoded using the `Encodable` trait, since this data must be the same for
+//! all systems. Any data going to the _user_ e.g., over JSONRPC, should use the
+//! ordinary `Encodable` trait. (This should also be the same across systems, of
+//! course, but has some critical differences from the network format e.g.,
+//! scripts come with an opcode decode, hashes are big-endian, numbers are
+//! typically big-endian decimals, etc.)
+//!
+
+use core::convert::From;
+use core::{fmt, mem, u32};
+
+use hashes::{sha256, sha256d, hash_x11, Hash, hash160};
+use internals::write_err;
+use crate::{address, OutPoint, ScriptBuf};
+use crate::transaction::special_transaction::TransactionType;
+use crate::bip152::{PrefilledTransaction, ShortId};
+use crate::transaction::{txin::TxIn, txout::TxOut};
+use crate::blockdata::transaction::{Transaction};
+use crate::hash_types::{BlockHash, FilterHash, FilterHeader, TxMerkleNode};
+use crate::io::{self, Cursor, Read};
+#[cfg(feature = "std")]
+use crate::network::{
+    address::{AddrV2Message, Address},
+    message_blockdata::Inventory,
+};
+use crate::prelude::*;
+use crate::taproot::TapLeafHash;
+
+/// Encoding error.
+#[derive(Debug)]
+#[non_exhaustive]
+pub enum Error {
+    /// And I/O error.
+    Io(io::Error),
+    /// Tried to allocate an oversized vector.
+    OversizedVectorAllocation {
+        /// The capacity requested.
+        requested: usize,
+        /// The maximum capacity.
+        max: usize,
+    },
+    /// Checksum was invalid.
+    InvalidChecksum {
+        /// The expected checksum.
+        expected: [u8; 4],
+        /// The invalid checksum.
+        actual: [u8; 4],
+    },
+    /// VarInt was encoded in a non-minimal way.
+    NonMinimalVarInt,
+    /// Parsing error.
+    ParseFailed(&'static str),
+    /// Unsupported Segwit flag.
+    UnsupportedSegwitFlag(u8),
+
+    /// A Vector was trying to be converted to a fixed size vector, but was the wrong size
+    InvalidVectorSize {
+        /// The expected size
+        expected: usize,
+        /// The actual size of the vector
+        actual: usize,
+    },
+    /// The Transaction type was not identified
+    UnknownSpecialTransactionType(u16),
+    /// We tried to convert the payload to the wrong type
+    WrongSpecialTransactionPayloadConversion {
+        /// The expected transaction type
+        expected: TransactionType,
+        /// The invalid transaction type
+        actual: TransactionType,
+    },
+    /// The script type was non standard
+    NonStandardScriptPayout(ScriptBuf),
+    /// Hex error
+    Hex(hashes::hex::Error),
+    /// Address error
+    Address(address::Error)
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Error::Io(ref e) => write_err!(f, "IO error"; e),
+            Error::OversizedVectorAllocation { requested: ref r, max: ref m } =>
+                write!(f, "allocation of oversized vector: requested {}, maximum {}", r, m),
+            Error::InvalidChecksum { expected: ref e, actual: ref a } =>
+                write!(f, "invalid checksum: expected {:x}, actual {:x}", e.as_hex(), a.as_hex()),
+            Error::NonMinimalVarInt => write!(f, "non-minimal varint"),
+            Error::ParseFailed(ref s) => write!(f, "parse failed: {}", s),
+            Error::UnsupportedSegwitFlag(ref swflag) =>
+                write!(f, "unsupported segwit version: {}", swflag),
+            Error::UnknownSpecialTransactionType(ref stt) =>
+                write!(f, "unknown special transaction type: {}", stt),
+            Error::WrongSpecialTransactionPayloadConversion { expected: ref e, actual: ref a } => write!(f,
+                                                                                                         "wrong special transaction payload conversion expected: {} got: {}", e, a),
+            Error::NonStandardScriptPayout(ref script) => write!(f,
+                                                                 "non standard script payout: {}", script.to_hex_string()),
+            Error::InvalidVectorSize { expected, actual } => write!(f, "invalid vector size error expected: {} got: {}", expected, actual),
+            Error::Hex(ref e) => write!(f, "hex error {}", e),
+            Error::Address(ref e) => write!(f, "address error {}", e),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match self {
+            Io(e) => Some(e),
+            OversizedVectorAllocation { .. }
+            | InvalidChecksum { .. }
+            | NonMinimalVarInt
+            | ParseFailed(_)
+            | UnsupportedSegwitFlag(_)
+            | Error::UnknownSpecialTransactionType(..)
+            | Error::WrongSpecialTransactionPayloadConversion { .. }
+            | Error::NonStandardScriptPayout(..)
+            | Error::InvalidVectorSize { .. }
+            | Error::Hex(_) => None,
+            | Error::Address(_) => None,
+        }
+    }
+}
+
+#[doc(hidden)]
+impl From<io::Error> for Error {
+    fn from(error: io::Error) -> Self { Error::Io(error) }
+}
+
+#[doc(hidden)]
+impl From<address::Error> for Error {
+    fn from(error: address::Error) -> Self {
+        Error::Address(error)
+    }
+}
+
+/// Encodes an object into a vector.
+pub fn serialize<T: Encodable + ?Sized>(data: &T) -> Vec<u8> {
+    let mut encoder = Vec::new();
+    let len = data.consensus_encode(&mut encoder).expect("in-memory writers don't error");
+    debug_assert_eq!(len, encoder.len());
+    encoder
+}
+
+/// Encodes an object into a hex-encoded string.
+pub fn serialize_hex<T: Encodable + ?Sized>(data: &T) -> String {
+    serialize(data).to_lower_hex_string()
+}
+
+/// Deserializes an object from a vector, will error if said deserialization
+/// doesn't consume the entire vector.
+pub fn deserialize<T: Decodable>(data: &[u8]) -> Result<T, Error> {
+    let (rv, consumed) = deserialize_partial(data)?;
+
+    // Fail if data are not consumed entirely.
+    if consumed == data.len() {
+        Ok(rv)
+    } else {
+        Err(Error::ParseFailed("data not consumed entirely when explicitly deserializing"))
+    }
+}
+
+/// Deserializes an object from a vector, but will not report an error if said deserialization
+/// doesn't consume the entire vector.
+pub fn deserialize_partial<T: Decodable>(data: &[u8]) -> Result<(T, usize), Error> {
+    let mut decoder = Cursor::new(data);
+    let rv = Decodable::consensus_decode_from_finite_reader(&mut decoder)?;
+    let consumed = decoder.position() as usize;
+
+    Ok((rv, consumed))
+}
+
+/// Extensions of `Write` to encode data as per Bitcoin consensus.
+pub trait WriteExt: io::Write {
+    /// Outputs a 128-bit unsigned integer.
+    fn emit_u128(&mut self, v: u128) -> Result<(), io::Error>;
+    /// Outputs a 64-bit unsigned integer.
+    fn emit_u64(&mut self, v: u64) -> Result<(), io::Error>;
+    /// Outputs a 32-bit unsigned integer.
+    fn emit_u32(&mut self, v: u32) -> Result<(), io::Error>;
+    /// Outputs a 16-bit unsigned integer.
+    fn emit_u16(&mut self, v: u16) -> Result<(), io::Error>;
+    /// Outputs an 8-bit unsigned integer.
+    fn emit_u8(&mut self, v: u8) -> Result<(), io::Error>;
+
+    /// Outputs a 64-bit signed integer.
+    fn emit_i64(&mut self, v: i64) -> Result<(), io::Error>;
+    /// Outputs a 32-bit signed integer.
+    fn emit_i32(&mut self, v: i32) -> Result<(), io::Error>;
+    /// Outputs a 16-bit signed integer.
+    fn emit_i16(&mut self, v: i16) -> Result<(), io::Error>;
+    /// Outputs an 8-bit signed integer.
+    fn emit_i8(&mut self, v: i8) -> Result<(), io::Error>;
+
+    /// Outputs a boolean.
+    fn emit_bool(&mut self, v: bool) -> Result<(), io::Error>;
+
+    /// Outputs a byte slice.
+    fn emit_slice(&mut self, v: &[u8]) -> Result<(), io::Error>;
+}
+
+/// Extensions of `Read` to decode data as per Bitcoin consensus.
+pub trait ReadExt: io::Read {
+    /// Reads a 128-bit unsigned integer.
+    fn read_u128(&mut self) -> Result<u128, Error>;
+    /// Reads a 64-bit unsigned integer.
+    fn read_u64(&mut self) -> Result<u64, Error>;
+    /// Reads a 32-bit unsigned integer.
+    fn read_u32(&mut self) -> Result<u32, Error>;
+    /// Reads a 16-bit unsigned integer.
+    fn read_u16(&mut self) -> Result<u16, Error>;
+    /// Reads an 8-bit unsigned integer.
+    fn read_u8(&mut self) -> Result<u8, Error>;
+
+    /// Reads a 64-bit signed integer.
+    fn read_i64(&mut self) -> Result<i64, Error>;
+    /// Reads a 32-bit signed integer.
+    fn read_i32(&mut self) -> Result<i32, Error>;
+    /// Reads a 16-bit signed integer.
+    fn read_i16(&mut self) -> Result<i16, Error>;
+    /// Reads an 8-bit signed integer.
+    fn read_i8(&mut self) -> Result<i8, Error>;
+
+    /// Reads a boolean.
+    fn read_bool(&mut self) -> Result<bool, Error>;
+
+    /// Reads a byte slice.
+    fn read_slice(&mut self, slice: &mut [u8]) -> Result<(), Error>;
+}
+
+macro_rules! encoder_fn {
+    ($name:ident, $val_type:ty) => {
+        #[inline]
+        fn $name(&mut self, v: $val_type) -> Result<(), io::Error> {
+            self.write_all(&v.to_le_bytes())
+        }
+    };
+}
+
+macro_rules! decoder_fn {
+    ($name:ident, $val_type:ty, $byte_len: expr) => {
+        #[inline]
+        fn $name(&mut self) -> Result<$val_type, Error> {
+            let mut val = [0; $byte_len];
+            self.read_exact(&mut val[..]).map_err(Error::Io)?;
+            Ok(<$val_type>::from_le_bytes(val))
+        }
+    };
+}
+
+impl<W: io::Write + ?Sized> WriteExt for W {
+    encoder_fn!(emit_u128, u128);
+    encoder_fn!(emit_u64, u64);
+    encoder_fn!(emit_u32, u32);
+    encoder_fn!(emit_u16, u16);
+    encoder_fn!(emit_i64, i64);
+    encoder_fn!(emit_i32, i32);
+    encoder_fn!(emit_i16, i16);
+
+    #[inline]
+    fn emit_i8(&mut self, v: i8) -> Result<(), io::Error> { self.write_all(&[v as u8]) }
+    #[inline]
+    fn emit_u8(&mut self, v: u8) -> Result<(), io::Error> { self.write_all(&[v]) }
+    #[inline]
+    fn emit_bool(&mut self, v: bool) -> Result<(), io::Error> { self.write_all(&[v as u8]) }
+    #[inline]
+    fn emit_slice(&mut self, v: &[u8]) -> Result<(), io::Error> { self.write_all(v) }
+}
+
+impl<R: Read + ?Sized> ReadExt for R {
+    decoder_fn!(read_u128, u128, 16);
+    decoder_fn!(read_u64, u64, 8);
+    decoder_fn!(read_u32, u32, 4);
+    decoder_fn!(read_u16, u16, 2);
+    decoder_fn!(read_i64, i64, 8);
+    decoder_fn!(read_i32, i32, 4);
+    decoder_fn!(read_i16, i16, 2);
+
+    #[inline]
+    fn read_u8(&mut self) -> Result<u8, Error> {
+        let mut slice = [0u8; 1];
+        self.read_exact(&mut slice)?;
+        Ok(slice[0])
+    }
+    #[inline]
+    fn read_i8(&mut self) -> Result<i8, Error> {
+        let mut slice = [0u8; 1];
+        self.read_exact(&mut slice)?;
+        Ok(slice[0] as i8)
+    }
+    #[inline]
+    fn read_bool(&mut self) -> Result<bool, Error> { ReadExt::read_i8(self).map(|bit| bit != 0) }
+    #[inline]
+    fn read_slice(&mut self, slice: &mut [u8]) -> Result<(), Error> {
+        self.read_exact(slice).map_err(Error::Io)
+    }
+}
+
+/// Maximum size, in bytes, of a vector we are allowed to decode.
+pub const MAX_VEC_SIZE: usize = 4_000_000;
+
+/// Data which can be encoded in a consensus-consistent way.
+pub trait Encodable {
+    /// Encodes an object with a well-defined format.
+    ///
+    /// # Returns
+    ///
+    /// The number of bytes written on success. The only errors returned are errors propagated from
+    /// the writer.
+    fn consensus_encode<W: io::Write + ?Sized>(&self, writer: &mut W) -> Result<usize, io::Error>;
+}
+
+/// Data which can be encoded in a consensus-consistent way.
+pub trait Decodable: Sized {
+    /// Decode `Self` from a size-limited reader.
+    ///
+    /// Like `consensus_decode` but relies on the reader being limited in the amount of data it
+    /// returns, e.g. by being wrapped in [`std::io::Take`].
+    ///
+    /// Failling to obide to this requirement might lead to memory exhaustion caused by malicious
+    /// inputs.
+    ///
+    /// Users should default to `consensus_decode`, but when data to be decoded is already in a byte
+    /// vector of a limited size, calling this function directly might be marginally faster (due to
+    /// avoiding extra checks).
+    ///
+    /// ### Rules for trait implementations
+    ///
+    /// * Simple types that that have a fixed size (own and member fields), don't have to overwrite
+    ///   this method, or be concern with it.
+    /// * Types that deserialize using externally provided length should implement it:
+    ///   * Make `consensus_decode` forward to `consensus_decode_bytes_from_finite_reader` with the
+    ///     reader wrapped by `Take`. Failure to do so, without other forms of memory exhaustion
+    ///     protection might lead to resource exhaustion vulnerability.
+    ///   * Put a max cap on things like `Vec::with_capacity` to avoid oversized allocations, and
+    ///     rely on the reader running out of data, and collections reallocating on a legitimately
+    ///     oversized input data, instead of trying to enforce arbitrary length limits.
+    /// * Types that contain other types that implement custom
+    ///   `consensus_decode_from_finite_reader`, should also implement it applying same rules, and
+    ///   in addition make sure to call `consensus_decode_from_finite_reader` on all members, to
+    ///   avoid creating redundant `Take` wrappers. Failure to do so might result only in a tiny
+    ///   performance hit.
+    #[inline]
+    fn consensus_decode_from_finite_reader<R: io::Read + ?Sized>(
+        reader: &mut R,
+    ) -> Result<Self, Error> {
+        // This method is always strictly less general than, `consensus_decode`, so it's safe and
+        // make sense to default to just calling it. This way most types, that don't care about
+        // protecting against resource exhaustion due to malicious input, can just ignore it.
+        Self::consensus_decode(reader)
+    }
+
+    /// Decode an object with a well-defined format.
+    ///
+    /// This is the method that should be implemented for a typical, fixed sized type
+    /// implementing this trait. Default implementation is wrapping the reader
+    /// in [`crate::io::Take`] to limit the input size to [`MAX_VEC_SIZE`], and forwards the call to
+    /// [`Self::consensus_decode_from_finite_reader`], which is convenient
+    /// for types that override [`Self::consensus_decode_from_finite_reader`]
+    /// instead.
+    #[inline]
+    fn consensus_decode<R: io::Read + ?Sized>(reader: &mut R) -> Result<Self, Error> {
+        Self::consensus_decode_from_finite_reader(reader.take(MAX_VEC_SIZE as u64).by_ref())
+    }
+}
+
+/// A variable-length unsigned integer.
+#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Debug)]
+pub struct VarInt(pub u64);
+
+/// Data which must be preceded by a 4-byte checksum.
+#[derive(PartialEq, Eq, Clone, Debug)]
+pub struct CheckedData(pub Vec<u8>);
+
+// Primitive types
+macro_rules! impl_int_encodable {
+    ($ty:ident, $meth_dec:ident, $meth_enc:ident) => {
+        impl Decodable for $ty {
+            #[inline]
+            fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+                ReadExt::$meth_dec(r)
+            }
+        }
+        impl Encodable for $ty {
+            #[inline]
+            fn consensus_encode<W: io::Write + ?Sized>(
+                &self,
+                w: &mut W,
+            ) -> Result<usize, io::Error> {
+                w.$meth_enc(*self)?;
+                Ok(mem::size_of::<$ty>())
+            }
+        }
+    };
+}
+
+impl_int_encodable!(u8, read_u8, emit_u8);
+impl_int_encodable!(u16, read_u16, emit_u16);
+impl_int_encodable!(u32, read_u32, emit_u32);
+impl_int_encodable!(u64, read_u64, emit_u64);
+impl_int_encodable!(u128, read_u128, emit_u128);
+impl_int_encodable!(i8, read_i8, emit_i8);
+impl_int_encodable!(i16, read_i16, emit_i16);
+impl_int_encodable!(i32, read_i32, emit_i32);
+impl_int_encodable!(i64, read_i64, emit_i64);
+
+#[allow(clippy::len_without_is_empty)] // VarInt has on concept of 'is_empty'.
+impl VarInt {
+    /// Gets the length of this VarInt when encoded.
+    ///
+    /// *Important: this method is only `const` in Rust 1.46 or higher!*
+    ///
+    /// Returns 1 for 0..=0xFC, 3 for 0xFD..=(2^16-1), 5 for 0x10000..=(2^32-1),
+    /// and 9 otherwise.
+    #[inline]
+    pub const fn len(&self) -> usize {
+        match self.0 {
+            0..=0xFC => 1,
+            0xFD..=0xFFFF => 3,
+            0x10000..=0xFFFFFFFF => 5,
+            _ => 9,
+        }
+    }
+}
+
+impl Encodable for VarInt {
+    #[inline]
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        match self.0 {
+            0..=0xFC => {
+                (self.0 as u8).consensus_encode(w)?;
+                Ok(1)
+            }
+            0xFD..=0xFFFF => {
+                w.emit_u8(0xFD)?;
+                (self.0 as u16).consensus_encode(w)?;
+                Ok(3)
+            }
+            0x10000..=0xFFFFFFFF => {
+                w.emit_u8(0xFE)?;
+                (self.0 as u32).consensus_encode(w)?;
+                Ok(5)
+            }
+            _ => {
+                w.emit_u8(0xFF)?;
+                self.0.consensus_encode(w)?;
+                Ok(9)
+            }
+        }
+    }
+}
+
+impl Decodable for VarInt {
+    #[inline]
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        let n = ReadExt::read_u8(r)?;
+        match n {
+            0xFF => {
+                let x = ReadExt::read_u64(r)?;
+                if x < 0x100000000 {
+                    Err(self::Error::NonMinimalVarInt)
+                } else {
+                    Ok(VarInt(x))
+                }
+            }
+            0xFE => {
+                let x = ReadExt::read_u32(r)?;
+                if x < 0x10000 {
+                    Err(self::Error::NonMinimalVarInt)
+                } else {
+                    Ok(VarInt(x as u64))
+                }
+            }
+            0xFD => {
+                let x = ReadExt::read_u16(r)?;
+                if x < 0xFD {
+                    Err(self::Error::NonMinimalVarInt)
+                } else {
+                    Ok(VarInt(x as u64))
+                }
+            }
+            n => Ok(VarInt(n as u64)),
+        }
+    }
+}
+
+impl Encodable for bool {
+    #[inline]
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        w.emit_bool(*self)?;
+        Ok(1)
+    }
+}
+
+impl Decodable for bool {
+    #[inline]
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<bool, Error> {
+        ReadExt::read_bool(r)
+    }
+}
+
+impl Encodable for String {
+    #[inline]
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let b = self.as_bytes();
+        let vi_len = VarInt(b.len() as u64).consensus_encode(w)?;
+        w.emit_slice(b)?;
+        Ok(vi_len + b.len())
+    }
+}
+
+impl Decodable for String {
+    #[inline]
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<String, Error> {
+        String::from_utf8(Decodable::consensus_decode(r)?)
+            .map_err(|_| self::Error::ParseFailed("String was not valid UTF8"))
+    }
+}
+
+impl Encodable for Cow<'static, str> {
+    #[inline]
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let b = self.as_bytes();
+        let vi_len = VarInt(b.len() as u64).consensus_encode(w)?;
+        w.emit_slice(b)?;
+        Ok(vi_len + b.len())
+    }
+}
+
+impl Decodable for Cow<'static, str> {
+    #[inline]
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Cow<'static, str>, Error> {
+        String::from_utf8(Decodable::consensus_decode(r)?)
+            .map_err(|_| self::Error::ParseFailed("String was not valid UTF8"))
+            .map(Cow::Owned)
+    }
+}
+
+macro_rules! impl_array {
+    ( $size:literal ) => {
+        impl Encodable for [u8; $size] {
+            #[inline]
+            fn consensus_encode<W: WriteExt + ?Sized>(
+                &self,
+                w: &mut W,
+            ) -> Result<usize, io::Error> {
+                w.emit_slice(&self[..])?;
+                Ok(self.len())
+            }
+        }
+
+        impl Decodable for [u8; $size] {
+            #[inline]
+            fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+                let mut ret = [0; $size];
+                r.read_slice(&mut ret)?;
+                Ok(ret)
+            }
+        }
+    };
+}
+
+impl_array!(2);
+impl_array!(4);
+impl_array!(6);
+impl_array!(8);
+impl_array!(10);
+impl_array!(12);
+impl_array!(16);
+impl_array!(20);
+impl_array!(32);
+impl_array!(33);
+impl_array!(48);
+impl_array!(64);
+impl_array!(96);
+
+impl Decodable for [u16; 8] {
+    #[inline]
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        let mut res = [0; 8];
+        for item in &mut res {
+            *item = Decodable::consensus_decode(r)?;
+        }
+        Ok(res)
+    }
+}
+
+impl Encodable for [u16; 8] {
+    #[inline]
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        for c in self.iter() {
+            c.consensus_encode(w)?;
+        }
+        Ok(16)
+    }
+}
+
+macro_rules! impl_vec {
+    ($type: ty) => {
+        impl Encodable for Vec<$type> {
+            #[inline]
+            fn consensus_encode<W: io::Write + ?Sized>(
+                &self,
+                w: &mut W,
+            ) -> Result<usize, io::Error> {
+                let mut len = 0;
+                len += VarInt(self.len() as u64).consensus_encode(w)?;
+                for c in self.iter() {
+                    len += c.consensus_encode(w)?;
+                }
+                Ok(len)
+            }
+        }
+
+        impl Decodable for Vec<$type> {
+            #[inline]
+            fn consensus_decode_from_finite_reader<R: io::Read + ?Sized>(
+                r: &mut R,
+            ) -> Result<Self, Error> {
+                let len = VarInt::consensus_decode_from_finite_reader(r)?.0;
+                // Do not allocate upfront more items than if the sequnce of type
+                // occupied roughly quarter a block. This should never be the case
+                // for normal data, but even if that's not true - `push` will just
+                // reallocate.
+                // Note: OOM protection relies on reader eventually running out of
+                // data to feed us.
+                let max_capacity = MAX_VEC_SIZE / 4 / mem::size_of::<$type>();
+                let mut ret = Vec::with_capacity(core::cmp::min(len as usize, max_capacity));
+                for _ in 0..len {
+                    ret.push(Decodable::consensus_decode_from_finite_reader(r)?);
+                }
+                Ok(ret)
+            }
+        }
+    };
+}
+impl_vec!(BlockHash);
+impl_vec!(FilterHash);
+impl_vec!(FilterHeader);
+impl_vec!(TxMerkleNode);
+impl_vec!(Transaction);
+impl_vec!(TxOut);
+impl_vec!(TxIn);
+impl_vec!(Vec<u8>);
+impl_vec!(u64);
+impl_vec!(TapLeafHash);
+impl_vec!(VarInt);
+impl_vec!(ShortId);
+impl_vec!(OutPoint);
+impl_vec!(PrefilledTransaction);
+
+#[cfg(feature = "std")]
+impl_vec!(Inventory);
+#[cfg(feature = "std")]
+impl_vec!((u32, Address));
+#[cfg(feature = "std")]
+impl_vec!(AddrV2Message);
+
+pub(crate) fn consensus_encode_with_size<S: io::Write>(
+    data: &[u8],
+    mut s: S,
+) -> Result<usize, io::Error> {
+    let vi_len = VarInt(data.len() as u64).consensus_encode(&mut s)?;
+    s.emit_slice(data)?;
+    Ok(vi_len + data.len())
+}
+
+struct ReadBytesFromFiniteReaderOpts {
+    len: usize,
+    chunk_size: usize,
+}
+
+/// Read `opts.len` bytes from reader, where `opts.len` could potentially be malicious.
+///
+/// This function relies on reader being bound in amount of data
+/// it returns for OOM protection. See [`Decodable::consensus_decode_from_finite_reader`].
+#[inline]
+fn read_bytes_from_finite_reader<D: io::Read>(
+    mut d: D,
+    mut opts: ReadBytesFromFiniteReaderOpts,
+) -> Result<Vec<u8>, Error> {
+    let mut ret = vec![];
+
+    assert_ne!(opts.chunk_size, 0);
+
+    while opts.len > 0 {
+        let chunk_start = ret.len();
+        let chunk_size = core::cmp::min(opts.len, opts.chunk_size);
+        let chunk_end = chunk_start + chunk_size;
+        ret.resize(chunk_end, 0u8);
+        d.read_slice(&mut ret[chunk_start..chunk_end])?;
+        opts.len -= chunk_size;
+    }
+
+    Ok(ret)
+}
+
+impl Encodable for Vec<u8> {
+    #[inline]
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        consensus_encode_with_size(self, w)
+    }
+}
+
+impl Decodable for Vec<u8> {
+    #[inline]
+    fn consensus_decode_from_finite_reader<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        let len = VarInt::consensus_decode(r)?.0 as usize;
+        // most real-world vec of bytes data, wouldn't be larger than 128KiB
+        let opts = ReadBytesFromFiniteReaderOpts { len, chunk_size: 128 * 1024 };
+        read_bytes_from_finite_reader(r, opts)
+    }
+}
+
+impl Encodable for Box<[u8]> {
+    #[inline]
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        consensus_encode_with_size(self, w)
+    }
+}
+
+impl Decodable for Box<[u8]> {
+    #[inline]
+    fn consensus_decode_from_finite_reader<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        <Vec<u8>>::consensus_decode_from_finite_reader(r).map(From::from)
+    }
+}
+
+/// Does a double-SHA256 on `data` and returns the first 4 bytes.
+fn sha2_checksum(data: &[u8]) -> [u8; 4] {
+    let checksum = <sha256d::Hash as Hash>::hash(data);
+    [checksum[0], checksum[1], checksum[2], checksum[3]]
+}
+
+impl Encodable for CheckedData {
+    #[inline]
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        (self.0.len() as u32).consensus_encode(w)?;
+        sha2_checksum(&self.0).consensus_encode(w)?;
+        w.emit_slice(&self.0)?;
+        Ok(8 + self.0.len())
+    }
+}
+
+impl Decodable for CheckedData {
+    #[inline]
+    fn consensus_decode_from_finite_reader<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        let len = u32::consensus_decode_from_finite_reader(r)? as usize;
+
+        let checksum = <[u8; 4]>::consensus_decode_from_finite_reader(r)?;
+        let opts = ReadBytesFromFiniteReaderOpts { len, chunk_size: MAX_VEC_SIZE };
+        let ret = read_bytes_from_finite_reader(r, opts)?;
+        let expected_checksum = sha2_checksum(&ret);
+        if expected_checksum != checksum {
+            Err(self::Error::InvalidChecksum { expected: expected_checksum, actual: checksum })
+        } else {
+            Ok(CheckedData(ret))
+        }
+    }
+}
+
+impl<'a, T: Encodable> Encodable for &'a T {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        (**self).consensus_encode(w)
+    }
+}
+
+impl<'a, T: Encodable> Encodable for &'a mut T {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        (**self).consensus_encode(w)
+    }
+}
+
+impl<T: Encodable> Encodable for rc::Rc<T> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        (**self).consensus_encode(w)
+    }
+}
+
+/// Note: This will fail to compile on old Rust for targets that don't support atomics
+#[cfg(any(not(rust_v_1_60), target_has_atomic = "ptr"))]
+impl<T: Encodable> Encodable for sync::Arc<T> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        (**self).consensus_encode(w)
+    }
+}
+
+macro_rules! tuple_encode {
+    ($($x:ident),*) => {
+        impl <$($x: Encodable),*> Encodable for ($($x),*) {
+            #[inline]
+            #[allow(non_snake_case)]
+            fn consensus_encode<W: io::Write + ?Sized>(
+                &self,
+                w: &mut W,
+            ) -> Result<usize, io::Error> {
+                let &($(ref $x),*) = self;
+                let mut len = 0;
+                $(len += $x.consensus_encode(w)?;)*
+                Ok(len)
+            }
+        }
+
+        impl<$($x: Decodable),*> Decodable for ($($x),*) {
+            #[inline]
+            #[allow(non_snake_case)]
+            fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+                Ok(($({let $x = Decodable::consensus_decode(r)?; $x }),*))
+            }
+        }
+    };
+}
+
+tuple_encode!(T0, T1);
+tuple_encode!(T0, T1, T2);
+tuple_encode!(T0, T1, T2, T3);
+tuple_encode!(T0, T1, T2, T3, T4);
+tuple_encode!(T0, T1, T2, T3, T4, T5);
+tuple_encode!(T0, T1, T2, T3, T4, T5, T6);
+tuple_encode!(T0, T1, T2, T3, T4, T5, T6, T7);
+
+impl Decodable for hash_x11::Hash {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        Ok(Self::from_byte_array(<<Self as Hash>::Bytes>::consensus_decode(r)?))
+    }
+}
+
+impl Encodable for hash_x11::Hash {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        self.as_byte_array().consensus_encode(w)
+    }
+}
+
+impl Encodable for hash160::Hash {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        self.as_byte_array().consensus_encode(w)
+    }
+}
+
+impl Decodable for hash160::Hash {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        Ok(Self::from_byte_array(<<Self as Hash>::Bytes>::consensus_decode(r)?))
+    }
+}
+
+impl Encodable for sha256d::Hash {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        self.as_byte_array().consensus_encode(w)
+    }
+}
+
+impl Decodable for sha256d::Hash {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        Ok(Self::from_byte_array(<<Self as Hash>::Bytes>::consensus_decode(r)?))
+    }
+}
+
+impl Encodable for sha256::Hash {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        self.as_byte_array().consensus_encode(w)
+    }
+}
+
+impl Decodable for sha256::Hash {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        Ok(Self::from_byte_array(<<Self as Hash>::Bytes>::consensus_decode(r)?))
+    }
+}
+
+impl Encodable for TapLeafHash {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        self.as_byte_array().consensus_encode(w)
+    }
+}
+
+impl Decodable for TapLeafHash {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        Ok(Self::from_byte_array(<<Self as Hash>::Bytes>::consensus_decode(r)?))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use core::fmt;
+    use core::mem::{self, discriminant};
+    use crate::{TxIn, TxOut};
+
+    use super::*;
+    use crate::consensus::{deserialize_partial, Decodable, Encodable};
+    #[cfg(feature = "std")]
+    use crate::network::{message_blockdata::Inventory, Address};
+
+    #[test]
+    fn serialize_int_test() {
+        // bool
+        assert_eq!(serialize(&false), vec![0u8]);
+        assert_eq!(serialize(&true), vec![1u8]);
+        // u8
+        assert_eq!(serialize(&1u8), vec![1u8]);
+        assert_eq!(serialize(&0u8), vec![0u8]);
+        assert_eq!(serialize(&255u8), vec![255u8]);
+        // u16
+        assert_eq!(serialize(&1u16), vec![1u8, 0]);
+        assert_eq!(serialize(&256u16), vec![0u8, 1]);
+        assert_eq!(serialize(&5000u16), vec![136u8, 19]);
+        // u32
+        assert_eq!(serialize(&1u32), vec![1u8, 0, 0, 0]);
+        assert_eq!(serialize(&256u32), vec![0u8, 1, 0, 0]);
+        assert_eq!(serialize(&5000u32), vec![136u8, 19, 0, 0]);
+        assert_eq!(serialize(&500000u32), vec![32u8, 161, 7, 0]);
+        assert_eq!(serialize(&168430090u32), vec![10u8, 10, 10, 10]);
+        // i32
+        assert_eq!(serialize(&-1i32), vec![255u8, 255, 255, 255]);
+        assert_eq!(serialize(&-256i32), vec![0u8, 255, 255, 255]);
+        assert_eq!(serialize(&-5000i32), vec![120u8, 236, 255, 255]);
+        assert_eq!(serialize(&-500000i32), vec![224u8, 94, 248, 255]);
+        assert_eq!(serialize(&-168430090i32), vec![246u8, 245, 245, 245]);
+        assert_eq!(serialize(&1i32), vec![1u8, 0, 0, 0]);
+        assert_eq!(serialize(&256i32), vec![0u8, 1, 0, 0]);
+        assert_eq!(serialize(&5000i32), vec![136u8, 19, 0, 0]);
+        assert_eq!(serialize(&500000i32), vec![32u8, 161, 7, 0]);
+        assert_eq!(serialize(&168430090i32), vec![10u8, 10, 10, 10]);
+        // u64
+        assert_eq!(serialize(&1u64), vec![1u8, 0, 0, 0, 0, 0, 0, 0]);
+        assert_eq!(serialize(&256u64), vec![0u8, 1, 0, 0, 0, 0, 0, 0]);
+        assert_eq!(serialize(&5000u64), vec![136u8, 19, 0, 0, 0, 0, 0, 0]);
+        assert_eq!(serialize(&500000u64), vec![32u8, 161, 7, 0, 0, 0, 0, 0]);
+        assert_eq!(serialize(&723401728380766730u64), vec![10u8, 10, 10, 10, 10, 10, 10, 10]);
+        // i64
+        assert_eq!(serialize(&-1i64), vec![255u8, 255, 255, 255, 255, 255, 255, 255]);
+        assert_eq!(serialize(&-256i64), vec![0u8, 255, 255, 255, 255, 255, 255, 255]);
+        assert_eq!(serialize(&-5000i64), vec![120u8, 236, 255, 255, 255, 255, 255, 255]);
+        assert_eq!(serialize(&-500000i64), vec![224u8, 94, 248, 255, 255, 255, 255, 255]);
+        assert_eq!(
+            serialize(&-723401728380766730i64),
+            vec![246u8, 245, 245, 245, 245, 245, 245, 245]
+        );
+        assert_eq!(serialize(&1i64), vec![1u8, 0, 0, 0, 0, 0, 0, 0]);
+        assert_eq!(serialize(&256i64), vec![0u8, 1, 0, 0, 0, 0, 0, 0]);
+        assert_eq!(serialize(&5000i64), vec![136u8, 19, 0, 0, 0, 0, 0, 0]);
+        assert_eq!(serialize(&500000i64), vec![32u8, 161, 7, 0, 0, 0, 0, 0]);
+        assert_eq!(serialize(&723401728380766730i64), vec![10u8, 10, 10, 10, 10, 10, 10, 10]);
+    }
+
+    #[test]
+    fn serialize_varint_test() {
+        assert_eq!(serialize(&VarInt(10)), vec![10u8]);
+        assert_eq!(serialize(&VarInt(0xFC)), vec![0xFCu8]);
+        assert_eq!(serialize(&VarInt(0xFD)), vec![0xFDu8, 0xFD, 0]);
+        assert_eq!(serialize(&VarInt(0xFFF)), vec![0xFDu8, 0xFF, 0xF]);
+        assert_eq!(serialize(&VarInt(0xF0F0F0F)), vec![0xFEu8, 0xF, 0xF, 0xF, 0xF]);
+        assert_eq!(
+            serialize(&VarInt(0xF0F0F0F0F0E0)),
+            vec![0xFFu8, 0xE0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0, 0]
+        );
+        assert_eq!(
+            test_varint_encode(0xFF, &0x100000000_u64.to_le_bytes()).unwrap(),
+            VarInt(0x100000000)
+        );
+        assert_eq!(test_varint_encode(0xFE, &0x10000_u64.to_le_bytes()).unwrap(), VarInt(0x10000));
+        assert_eq!(test_varint_encode(0xFD, &0xFD_u64.to_le_bytes()).unwrap(), VarInt(0xFD));
+
+        // Test that length calc is working correctly
+        test_varint_len(VarInt(0), 1);
+        test_varint_len(VarInt(0xFC), 1);
+        test_varint_len(VarInt(0xFD), 3);
+        test_varint_len(VarInt(0xFFFF), 3);
+        test_varint_len(VarInt(0x10000), 5);
+        test_varint_len(VarInt(0xFFFFFFFF), 5);
+        test_varint_len(VarInt(0xFFFFFFFF + 1), 9);
+        test_varint_len(VarInt(u64::max_value()), 9);
+    }
+
+    fn test_varint_len(varint: VarInt, expected: usize) {
+        let mut encoder = vec![];
+        assert_eq!(varint.consensus_encode(&mut encoder).unwrap(), expected);
+        assert_eq!(varint.len(), expected);
+    }
+
+    fn test_varint_encode(n: u8, x: &[u8]) -> Result<VarInt, Error> {
+        let mut input = [0u8; 9];
+        input[0] = n;
+        input[1..x.len() + 1].copy_from_slice(x);
+        deserialize_partial::<VarInt>(&input).map(|t| t.0)
+    }
+
+    #[test]
+    fn deserialize_nonminimal_vec() {
+        // Check the edges for variant int
+        assert_eq!(
+            discriminant(
+                &test_varint_encode(0xFF, &(0x100000000_u64 - 1).to_le_bytes()).unwrap_err()
+            ),
+            discriminant(&Error::NonMinimalVarInt)
+        );
+        assert_eq!(
+            discriminant(&test_varint_encode(0xFE, &(0x10000_u64 - 1).to_le_bytes()).unwrap_err()),
+            discriminant(&Error::NonMinimalVarInt)
+        );
+        assert_eq!(
+            discriminant(&test_varint_encode(0xFD, &(0xFD_u64 - 1).to_le_bytes()).unwrap_err()),
+            discriminant(&Error::NonMinimalVarInt)
+        );
+
+        assert_eq!(
+            discriminant(&deserialize::<Vec<u8>>(&[0xfd, 0x00, 0x00]).unwrap_err()),
+            discriminant(&Error::NonMinimalVarInt)
+        );
+        assert_eq!(
+            discriminant(&deserialize::<Vec<u8>>(&[0xfd, 0xfc, 0x00]).unwrap_err()),
+            discriminant(&Error::NonMinimalVarInt)
+        );
+        assert_eq!(
+            discriminant(&deserialize::<Vec<u8>>(&[0xfd, 0xfc, 0x00]).unwrap_err()),
+            discriminant(&Error::NonMinimalVarInt)
+        );
+        assert_eq!(
+            discriminant(&deserialize::<Vec<u8>>(&[0xfe, 0xff, 0x00, 0x00, 0x00]).unwrap_err()),
+            discriminant(&Error::NonMinimalVarInt)
+        );
+        assert_eq!(
+            discriminant(&deserialize::<Vec<u8>>(&[0xfe, 0xff, 0xff, 0x00, 0x00]).unwrap_err()),
+            discriminant(&Error::NonMinimalVarInt)
+        );
+        assert_eq!(
+            discriminant(
+                &deserialize::<Vec<u8>>(&[0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00])
+                    .unwrap_err()
+            ),
+            discriminant(&Error::NonMinimalVarInt)
+        );
+        assert_eq!(
+            discriminant(
+                &deserialize::<Vec<u8>>(&[0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00])
+                    .unwrap_err()
+            ),
+            discriminant(&Error::NonMinimalVarInt)
+        );
+
+        let mut vec_256 = vec![0; 259];
+        vec_256[0] = 0xfd;
+        vec_256[1] = 0x00;
+        vec_256[2] = 0x01;
+        assert!(deserialize::<Vec<u8>>(&vec_256).is_ok());
+
+        let mut vec_253 = vec![0; 256];
+        vec_253[0] = 0xfd;
+        vec_253[1] = 0xfd;
+        vec_253[2] = 0x00;
+        assert!(deserialize::<Vec<u8>>(&vec_253).is_ok());
+    }
+
+    #[test]
+    fn serialize_checkeddata_test() {
+        let cd = CheckedData(vec![1u8, 2, 3, 4, 5]);
+        assert_eq!(serialize(&cd), vec![5, 0, 0, 0, 162, 107, 175, 90, 1, 2, 3, 4, 5]);
+    }
+
+    #[test]
+    fn serialize_vector_test() {
+        assert_eq!(serialize(&vec![1u8, 2, 3]), vec![3u8, 1, 2, 3]);
+        // TODO: test vectors of more interesting objects
+    }
+
+    #[test]
+    fn serialize_strbuf_test() {
+        assert_eq!(serialize(&"Andrew".to_string()), vec![6u8, 0x41, 0x6e, 0x64, 0x72, 0x65, 0x77]);
+    }
+
+    #[test]
+    fn deserialize_int_test() {
+        // bool
+        assert!((deserialize(&[58u8, 0]) as Result<bool, _>).is_err());
+        assert_eq!(deserialize(&[58u8]).ok(), Some(true));
+        assert_eq!(deserialize(&[1u8]).ok(), Some(true));
+        assert_eq!(deserialize(&[0u8]).ok(), Some(false));
+        assert!((deserialize(&[0u8, 1]) as Result<bool, _>).is_err());
+
+        // u8
+        assert_eq!(deserialize(&[58u8]).ok(), Some(58u8));
+
+        // u16
+        assert_eq!(deserialize(&[0x01u8, 0x02]).ok(), Some(0x0201u16));
+        assert_eq!(deserialize(&[0xABu8, 0xCD]).ok(), Some(0xCDABu16));
+        assert_eq!(deserialize(&[0xA0u8, 0x0D]).ok(), Some(0xDA0u16));
+        let failure16: Result<u16, _> = deserialize(&[1u8]);
+        assert!(failure16.is_err());
+
+        // i16
+        assert_eq!(deserialize(&[0x32_u8, 0xF4]).ok(), Some(-0x0bce_i16));
+        assert_eq!(deserialize(&[0xFF_u8, 0xFE]).ok(), Some(-0x0101_i16));
+        assert_eq!(deserialize(&[0x00_u8, 0x00]).ok(), Some(-0_i16));
+        assert_eq!(deserialize(&[0xFF_u8, 0xFA]).ok(), Some(-0x0501_i16));
+
+        // u32
+        assert_eq!(deserialize(&[0xABu8, 0xCD, 0, 0]).ok(), Some(0xCDABu32));
+        assert_eq!(deserialize(&[0xA0u8, 0x0D, 0xAB, 0xCD]).ok(), Some(0xCDAB0DA0u32));
+
+        let failure32: Result<u32, _> = deserialize(&[1u8, 2, 3]);
+        assert!(failure32.is_err());
+
+        // i32
+        assert_eq!(deserialize(&[0xABu8, 0xCD, 0, 0]).ok(), Some(0xCDABi32));
+        assert_eq!(deserialize(&[0xA0u8, 0x0D, 0xAB, 0x2D]).ok(), Some(0x2DAB0DA0i32));
+
+        assert_eq!(deserialize(&[0, 0, 0, 0]).ok(), Some(-0_i32));
+        assert_eq!(deserialize(&[0, 0, 0, 0]).ok(), Some(0_i32));
+
+        assert_eq!(deserialize(&[0xFF, 0xFF, 0xFF, 0xFF]).ok(), Some(-1_i32));
+        assert_eq!(deserialize(&[0xFE, 0xFF, 0xFF, 0xFF]).ok(), Some(-2_i32));
+        assert_eq!(deserialize(&[0x01, 0xFF, 0xFF, 0xFF]).ok(), Some(-255_i32));
+        assert_eq!(deserialize(&[0x02, 0xFF, 0xFF, 0xFF]).ok(), Some(-254_i32));
+
+        let failurei32: Result<i32, _> = deserialize(&[1u8, 2, 3]);
+        assert!(failurei32.is_err());
+
+        // u64
+        assert_eq!(deserialize(&[0xABu8, 0xCD, 0, 0, 0, 0, 0, 0]).ok(), Some(0xCDABu64));
+        assert_eq!(
+            deserialize(&[0xA0u8, 0x0D, 0xAB, 0xCD, 0x99, 0, 0, 0x99]).ok(),
+            Some(0x99000099CDAB0DA0u64)
+        );
+        let failure64: Result<u64, _> = deserialize(&[1u8, 2, 3, 4, 5, 6, 7]);
+        assert!(failure64.is_err());
+
+        // i64
+        assert_eq!(deserialize(&[0xABu8, 0xCD, 0, 0, 0, 0, 0, 0]).ok(), Some(0xCDABi64));
+        assert_eq!(
+            deserialize(&[0xA0u8, 0x0D, 0xAB, 0xCD, 0x99, 0, 0, 0x99]).ok(),
+            Some(-0x66ffff663254f260i64)
+        );
+        assert_eq!(
+            deserialize(&[0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]).ok(),
+            Some(-1_i64)
+        );
+        assert_eq!(
+            deserialize(&[0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]).ok(),
+            Some(-2_i64)
+        );
+        assert_eq!(
+            deserialize(&[0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]).ok(),
+            Some(-255_i64)
+        );
+        assert_eq!(
+            deserialize(&[0x02, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]).ok(),
+            Some(-254_i64)
+        );
+
+        let failurei64: Result<i64, _> = deserialize(&[1u8, 2, 3, 4, 5, 6, 7]);
+        assert!(failurei64.is_err());
+    }
+
+    #[test]
+    fn deserialize_vec_test() {
+        assert_eq!(deserialize(&[3u8, 2, 3, 4]).ok(), Some(vec![2u8, 3, 4]));
+        assert!((deserialize(&[4u8, 2, 3, 4, 5, 6]) as Result<Vec<u8>, _>).is_err());
+        // found by cargo fuzz
+        assert!(deserialize::<Vec<u64>>(&[
+            0xff, 0xff, 0xff, 0xff, 0x6b, 0x6b, 0x6b, 0x6b, 0x6b, 0x6b, 0x6b, 0x6b, 0x6b, 0x6b,
+            0x6b, 0x6b, 0xa, 0xa, 0x3a
+        ])
+            .is_err());
+
+        let rand_io_err = Error::Io(io::Error::new(io::ErrorKind::Other, ""));
+
+        // Check serialization that `if len > MAX_VEC_SIZE {return err}` isn't inclusive,
+        // by making sure it fails with IO Error and not an `OversizedVectorAllocation` Error.
+        let err =
+            deserialize::<CheckedData>(&serialize(&(super::MAX_VEC_SIZE as u32))).unwrap_err();
+        assert_eq!(discriminant(&err), discriminant(&rand_io_err));
+
+        test_len_is_max_vec::<u8>();
+        test_len_is_max_vec::<BlockHash>();
+        test_len_is_max_vec::<FilterHash>();
+        test_len_is_max_vec::<TxMerkleNode>();
+        test_len_is_max_vec::<Transaction>();
+        test_len_is_max_vec::<TxOut>();
+        test_len_is_max_vec::<TxIn>();
+        test_len_is_max_vec::<Vec<u8>>();
+        test_len_is_max_vec::<u64>();
+        #[cfg(feature = "std")]
+        test_len_is_max_vec::<(u32, Address)>();
+        #[cfg(feature = "std")]
+        test_len_is_max_vec::<Inventory>();
+    }
+
+    fn test_len_is_max_vec<T>()
+        where
+            Vec<T>: Decodable,
+            T: fmt::Debug,
+    {
+        let rand_io_err = Error::Io(io::Error::new(io::ErrorKind::Other, ""));
+        let varint = VarInt((super::MAX_VEC_SIZE / mem::size_of::<T>()) as u64);
+        let err = deserialize::<Vec<T>>(&serialize(&varint)).unwrap_err();
+        assert_eq!(discriminant(&err), discriminant(&rand_io_err));
+    }
+
+    #[test]
+    fn deserialize_strbuf_test() {
+        assert_eq!(
+            deserialize(&[6u8, 0x41, 0x6e, 0x64, 0x72, 0x65, 0x77]).ok(),
+            Some("Andrew".to_string())
+        );
+        assert_eq!(
+            deserialize(&[6u8, 0x41, 0x6e, 0x64, 0x72, 0x65, 0x77]).ok(),
+            Some(Cow::Borrowed("Andrew"))
+        );
+    }
+
+    #[test]
+    fn deserialize_checkeddata_test() {
+        let cd: Result<CheckedData, _> =
+            deserialize(&[5u8, 0, 0, 0, 162, 107, 175, 90, 1, 2, 3, 4, 5]);
+        assert_eq!(cd.ok(), Some(CheckedData(vec![1u8, 2, 3, 4, 5])));
+    }
+
+    #[test]
+    fn limit_read_test() {
+        let witness = vec![vec![0u8; 3_999_999]; 2];
+        let ser = serialize(&witness);
+        let mut reader = io::Cursor::new(ser);
+        let err = Vec::<Vec<u8>>::consensus_decode(&mut reader);
+        assert!(err.is_err());
+    }
+
+    #[test]
+    #[cfg(feature = "rand-std")]
+    fn serialization_round_trips() {
+        use secp256k1::rand::{thread_rng, Rng};
+
+        macro_rules! round_trip {
+            ($($val_type:ty),*) => {
+                $(
+                    let r: $val_type = thread_rng().gen();
+                    assert_eq!(deserialize::<$val_type>(&serialize(&r)).unwrap(), r);
+                )*
+            };
+        }
+        macro_rules! round_trip_bytes {
+            ($(($val_type:ty, $data:expr)),*) => {
+                $(
+                    thread_rng().fill(&mut $data[..]);
+                    assert_eq!(deserialize::<$val_type>(&serialize(&$data)).unwrap()[..], $data[..]);
+                )*
+            };
+        }
+
+        let mut data = Vec::with_capacity(256);
+        let mut data64 = Vec::with_capacity(256);
+        for _ in 0..10 {
+            round_trip! {bool, i8, u8, i16, u16, i32, u32, i64, u64,
+            (bool, i8, u16, i32), (u64, i64, u32, i32, u16, i16), (i8, u8, i16, u16, i32, u32, i64, u64),
+            [u8; 2], [u8; 4], [u8; 8], [u8; 12], [u8; 16], [u8; 32]}
+
+            data.clear();
+            data64.clear();
+            let len = thread_rng().gen_range(1..256);
+            data.resize(len, 0u8);
+            data64.resize(len, 0u64);
+            let mut arr33 = [0u8; 33];
+            let mut arr16 = [0u16; 8];
+            round_trip_bytes! {(Vec<u8>, data), ([u8; 33], arr33), ([u16; 8], arr16), (Vec<u64>, data64)}
+        }
+    }
+
+    #[test]
+    fn test_read_bytes_from_finite_reader() {
+        let data: Vec<u8> = (0..10).collect();
+
+        for chunk_size in 1..20 {
+            assert_eq!(
+                read_bytes_from_finite_reader(
+                    io::Cursor::new(&data),
+                    ReadBytesFromFiniteReaderOpts { len: data.len(), chunk_size },
+                )
+                    .unwrap(),
+                data
+            );
+        }
+    }
+}
diff --git a/src/consensus/mod.rs b/dash/src/consensus/mod.rs
similarity index 95%
rename from src/consensus/mod.rs
rename to dash/src/consensus/mod.rs
index ce99731be..ab04ab3a7 100644
--- a/src/consensus/mod.rs
+++ b/dash/src/consensus/mod.rs
@@ -20,6 +20,8 @@
 
 pub mod encode;
 pub mod params;
+#[cfg(feature = "serde")]
+pub mod serde;
 
 pub use self::encode::{Encodable, Decodable, WriteExt, ReadExt};
 pub use self::encode::{serialize, deserialize, deserialize_partial};
diff --git a/src/consensus/params.rs b/dash/src/consensus/params.rs
similarity index 82%
rename from src/consensus/params.rs
rename to dash/src/consensus/params.rs
index e8c0ad4ca..449505aa7 100644
--- a/src/consensus/params.rs
+++ b/dash/src/consensus/params.rs
@@ -21,39 +21,11 @@
 //! chains (such as mainnet, testnet).
 //!
 
-use network::constants::Network;
-use util::uint::Uint256;
-
-/// Lowest possible difficulty for Mainnet. See comment on Params::pow_limit for more info.
-const MAX_BITS_BITCOIN: Uint256 = Uint256([
-    0x0000000000000000u64,
-    0x0000000000000000u64,
-    0x0000000000000000u64,
-    0x00000000ffff0000u64,
-]);
-/// Lowest possible difficulty for Testnet. See comment on Params::pow_limit for more info.
-const MAX_BITS_TESTNET: Uint256 = Uint256([
-    0x0000000000000000u64,
-    0x0000000000000000u64,
-    0x0000000000000000u64,
-    0x00000000ffff0000u64,
-]);
-/// Lowest possible difficulty for Devnet. See comment on Params::pow_limit for more info.
-const MAX_BITS_DEVNET: Uint256 = Uint256([
-    0x0000000000000000u64,
-    0x0000000000000000u64,
-    0x0000000000000000u64,
-    0x00000377ae000000u64,
-]);
-/// Lowest possible difficulty for Regtest. See comment on Params::pow_limit for more info.
-const MAX_BITS_REGTEST: Uint256 = Uint256([
-    0x0000000000000000u64,
-    0x0000000000000000u64,
-    0x0000000000000000u64,
-    0x7fffff0000000000u64,
-]);
+use crate::network::constants::Network;
+use crate::Work;
 
 /// Parameters that influence chain consensus.
+#[non_exhaustive]
 #[derive(Debug, Clone)]
 pub struct Params {
     /// Network for which parameters are valid.
@@ -80,7 +52,7 @@ pub struct Params {
     /// Still, this should not affect consensus as the only place where the non-compact form of
     /// this is used in Bitcoin Core's consensus algorithm is in comparison and there are no
     /// compact-expressible values between Bitcoin Core's and the limit expressed here.
-    pub pow_limit: Uint256,
+    pub pow_limit: Work,
     /// Expected amount of time to mine one block.
     pub pow_target_spacing: u64,
     /// Difficulty recalculation interval.
@@ -103,7 +75,7 @@ impl Params {
                 bip66_height: 363725, // 00000000000000000379eaa19dce8c9b722d46ae6a57c2f1a988119488b50931
                 rule_change_activation_threshold: 1916, // 95%
                 miner_confirmation_window: 2016,
-                pow_limit: MAX_BITS_BITCOIN,
+                pow_limit: Work::MAINNET_MIN,
                 pow_target_spacing: 10 * 60,            // 10 minutes.
                 pow_target_timespan: 14 * 24 * 60 * 60, // 2 weeks.
                 allow_min_difficulty_blocks: false,
@@ -117,7 +89,7 @@ impl Params {
                 bip66_height: 330776, // 000000002104c8c45e99a8853285a3b592602a3ccde2b832481da85e9e4ba182
                 rule_change_activation_threshold: 1512, // 75%
                 miner_confirmation_window: 2016,
-                pow_limit: MAX_BITS_TESTNET,
+                pow_limit: Work::TESTNET_MIN,
                 pow_target_spacing: 10 * 60,            // 10 minutes.
                 pow_target_timespan: 14 * 24 * 60 * 60, // 2 weeks.
                 allow_min_difficulty_blocks: true,
@@ -131,7 +103,7 @@ impl Params {
                 bip66_height: 1,
                 rule_change_activation_threshold: 1916, // 95%
                 miner_confirmation_window: 2016,
-                pow_limit: MAX_BITS_DEVNET,
+                pow_limit: Work::DEVNET_MIN,
                 pow_target_spacing: 10 * 60,            // 10 minutes.
                 pow_target_timespan: 14 * 24 * 60 * 60, // 2 weeks.
                 allow_min_difficulty_blocks: false,
@@ -145,7 +117,7 @@ impl Params {
                 bip66_height: 1251,                    // used only in rpc tests
                 rule_change_activation_threshold: 108, // 75%
                 miner_confirmation_window: 144,
-                pow_limit: MAX_BITS_REGTEST,
+                pow_limit: Work::REGTEST_MIN,
                 pow_target_spacing: 10 * 60,            // 10 minutes.
                 pow_target_timespan: 14 * 24 * 60 * 60, // 2 weeks.
                 allow_min_difficulty_blocks: true,
@@ -159,3 +131,4 @@ impl Params {
         self.pow_target_timespan / self.pow_target_spacing
     }
 }
+
diff --git a/dash/src/consensus/serde.rs b/dash/src/consensus/serde.rs
new file mode 100644
index 000000000..25ae36f21
--- /dev/null
+++ b/dash/src/consensus/serde.rs
@@ -0,0 +1,591 @@
+//! Serde serialization via consensus encoding
+//!
+//! This provides functions for (de)serializing any type as consensus-encoded bytes.
+//! For human-readable formats it serializes as a string with a consumer-supplied encoding, for
+//! binary formats it serializes as a sequence of bytes (not `serialize_bytes` to avoid allocations).
+//!
+//! The string encoding has to be specified using a marker type implementing the encoding strategy.
+//! This crate provides hex encoding via `Hex<Upper>` and `Hex<Lower>`
+
+use core::fmt;
+use core::marker::PhantomData;
+
+use serde::de::{SeqAccess, Unexpected, Visitor};
+use serde::ser::SerializeSeq;
+use serde::{Deserializer, Serializer};
+
+use super::encode::Error as ConsensusError;
+use super::{Decodable, Encodable};
+use crate::io;
+use crate::alloc::string::ToString;
+
+/// Hex-encoding strategy
+pub struct Hex<Case = hex::Lower>(PhantomData<Case>)
+    where
+        Case: hex::Case;
+
+impl<C: hex::Case> Default for Hex<C> {
+    fn default() -> Self { Hex(Default::default()) }
+}
+
+impl<C: hex::Case> ByteEncoder for Hex<C> {
+    type Encoder = hex::Encoder<C>;
+}
+
+/// Implements hex encoding.
+pub mod hex {
+    use core::fmt;
+    use core::marker::PhantomData;
+
+    use internals::hex::BufEncoder;
+
+    /// Marker for upper/lower case type-level flags ("type-level enum").
+    ///
+    /// You may use this trait in bounds only.
+    pub trait Case: sealed::Case {}
+
+    impl<T: sealed::Case> Case for T {}
+
+    /// Marker for using lower-case hex encoding.
+    pub enum Lower {}
+
+    /// Marker for using upper-case hex encoding.
+    pub enum Upper {}
+
+    mod sealed {
+        pub trait Case {
+            /// Internal detail, don't depend on it!!!
+            const INTERNAL_CASE: internals::hex::Case;
+        }
+
+        impl Case for super::Lower {
+            const INTERNAL_CASE: internals::hex::Case = internals::hex::Case::Lower;
+        }
+
+        impl Case for super::Upper {
+            const INTERNAL_CASE: internals::hex::Case = internals::hex::Case::Upper;
+        }
+    }
+
+    // TODO measure various sizes and determine the best value
+    const HEX_BUF_SIZE: usize = 512;
+
+    /// Hex byte encoder.
+    // We wrap `BufEncoder` to not leak internal representation.
+    pub struct Encoder<C: Case>(BufEncoder<[u8; HEX_BUF_SIZE]>, PhantomData<C>);
+
+    impl<C: Case> From<super::Hex<C>> for Encoder<C> {
+        fn from(_: super::Hex<C>) -> Self {
+            Encoder(BufEncoder::new([0; HEX_BUF_SIZE]), Default::default())
+        }
+    }
+
+    impl<C: Case> super::EncodeBytes for Encoder<C> {
+        fn encode_chunk<W: fmt::Write>(&mut self, writer: &mut W, mut bytes: &[u8]) -> fmt::Result {
+            while !bytes.is_empty() {
+                if self.0.is_full() {
+                    self.flush(writer)?;
+                }
+                bytes = self.0.put_bytes_min(bytes, C::INTERNAL_CASE);
+            }
+            Ok(())
+        }
+
+        fn flush<W: fmt::Write>(&mut self, writer: &mut W) -> fmt::Result {
+            writer.write_str(self.0.as_str())?;
+            self.0.clear();
+            Ok(())
+        }
+    }
+
+    // Newtypes to hide internal details.
+    // TODO: statically prove impossible cases
+
+    /// Error returned when a hex string decoder can't be created.
+    #[derive(Debug)]
+    pub struct DecodeInitError(hashes::hex::Error);
+
+    /// Error returned when a hex string contains invalid characters.
+    #[derive(Debug)]
+    pub struct DecodeError(hashes::hex::Error);
+
+    /// Hex decoder state.
+    pub struct Decoder<'a>(hashes::hex::HexIterator<'a>);
+
+    impl<'a> Decoder<'a> {
+        fn new(s: &'a str) -> Result<Self, DecodeInitError> {
+            match hashes::hex::HexIterator::new(s) {
+                Ok(iter) => Ok(Decoder(iter)),
+                Err(error) => Err(DecodeInitError(error)),
+            }
+        }
+    }
+
+    impl<'a> Iterator for Decoder<'a> {
+        type Item = Result<u8, DecodeError>;
+
+        fn next(&mut self) -> Option<Self::Item> {
+            self.0.next().map(|result| result.map_err(DecodeError))
+        }
+    }
+
+    impl<'a, C: Case> super::ByteDecoder<'a> for super::Hex<C> {
+        type InitError = DecodeInitError;
+        type DecodeError = DecodeError;
+        type Decoder = Decoder<'a>;
+
+        fn from_str(s: &'a str) -> Result<Self::Decoder, Self::InitError> { Decoder::new(s) }
+    }
+
+    impl super::IntoDeError for DecodeInitError {
+        fn into_de_error<E: serde::de::Error>(self) -> E {
+            use hashes::hex::Error;
+
+            match self.0 {
+                Error::OddLengthString(len) =>
+                    E::invalid_length(len, &"an even number of ASCII-encoded hex digits"),
+                error => panic!("unexpected error: {:?}", error),
+            }
+        }
+    }
+
+    impl super::IntoDeError for DecodeError {
+        fn into_de_error<E: serde::de::Error>(self) -> E {
+            use hashes::hex::Error;
+            use serde::de::Unexpected;
+
+            const EXPECTED_CHAR: &str = "an ASCII-encoded hex digit";
+
+            match self.0 {
+                Error::InvalidChar(c) if c.is_ascii() =>
+                    E::invalid_value(Unexpected::Char(c as _), &EXPECTED_CHAR),
+                Error::InvalidChar(c) =>
+                    E::invalid_value(Unexpected::Unsigned(c.into()), &EXPECTED_CHAR),
+                error => panic!("unexpected error: {:?}", error),
+            }
+        }
+    }
+}
+
+struct DisplayWrapper<'a, T: 'a + Encodable, E>(&'a T, PhantomData<E>);
+
+impl<'a, T: 'a + Encodable, E: ByteEncoder> fmt::Display for DisplayWrapper<'a, T, E> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let mut writer = IoWrapper::<'_, _, E::Encoder>::new(f, E::default().into());
+        self.0.consensus_encode(&mut writer).map_err(|error| {
+            #[cfg(debug_assertions)]
+            {
+                use crate::StdError;
+
+                if error.kind() != io::ErrorKind::Other
+                    || error.source().is_some()
+                    || !writer.writer.was_error
+                {
+                    panic!(
+                        "{} returned an unexpected error: {:?}",
+                        core::any::type_name::<T>(),
+                        error
+                    );
+                }
+            }
+            fmt::Error
+        })?;
+        let result = writer.actually_flush();
+        if result.is_err() {
+            writer.writer.assert_was_error::<E>();
+        }
+        result
+    }
+}
+
+struct ErrorTrackingWriter<W: fmt::Write> {
+    writer: W,
+    #[cfg(debug_assertions)]
+    was_error: bool,
+}
+
+impl<W: fmt::Write> ErrorTrackingWriter<W> {
+    fn new(writer: W) -> Self {
+        ErrorTrackingWriter {
+            writer,
+            #[cfg(debug_assertions)]
+            was_error: false,
+        }
+    }
+
+    #[track_caller]
+    fn assert_no_error(&self, fun: &str) {
+        #[cfg(debug_assertions)]
+        {
+            if self.was_error {
+                panic!("`{}` called on errored writer", fun);
+            }
+        }
+    }
+
+    fn assert_was_error<Offender>(&self) {
+        #[cfg(debug_assertions)]
+        {
+            if !self.was_error {
+                panic!("{} returned an error unexpectedly", core::any::type_name::<Offender>());
+            }
+        }
+    }
+
+    fn set_error(&mut self, was: bool) {
+        #[cfg(debug_assertions)]
+        {
+            self.was_error |= was;
+        }
+    }
+
+    fn check_err<T, E>(&mut self, result: Result<T, E>) -> Result<T, E> {
+        self.set_error(result.is_err());
+        result
+    }
+}
+
+impl<W: fmt::Write> fmt::Write for ErrorTrackingWriter<W> {
+    fn write_str(&mut self, s: &str) -> fmt::Result {
+        self.assert_no_error("write_str");
+        let result = self.writer.write_str(s);
+        self.check_err(result)
+    }
+
+    fn write_char(&mut self, c: char) -> fmt::Result {
+        self.assert_no_error("write_char");
+        let result = self.writer.write_char(c);
+        self.check_err(result)
+    }
+}
+
+struct IoWrapper<'a, W: fmt::Write, E: EncodeBytes> {
+    writer: ErrorTrackingWriter<&'a mut W>,
+    encoder: E,
+}
+
+impl<'a, W: fmt::Write, E: EncodeBytes> IoWrapper<'a, W, E> {
+    fn new(writer: &'a mut W, encoder: E) -> Self {
+        IoWrapper { writer: ErrorTrackingWriter::new(writer), encoder }
+    }
+
+    fn actually_flush(&mut self) -> fmt::Result { self.encoder.flush(&mut self.writer) }
+}
+
+impl<'a, W: fmt::Write, E: EncodeBytes> io::Write for IoWrapper<'a, W, E> {
+    fn write(&mut self, bytes: &[u8]) -> io::Result<usize> {
+        match self.encoder.encode_chunk(&mut self.writer, bytes) {
+            Ok(()) => Ok(bytes.len()),
+            Err(fmt::Error) => {
+                self.writer.assert_was_error::<E>();
+                Err(io::Error::from(io::ErrorKind::Other))
+            }
+        }
+    }
+    // we intentionally ignore flushes because we will do a single flush at the end.
+    fn flush(&mut self) -> io::Result<()> { Ok(()) }
+}
+
+/// Provides an instance of byte-to-string encoder.
+///
+/// This is basically a type constructor used in places where value arguments are not accepted.
+/// Such as the generic `serialize`.
+pub trait ByteEncoder: Default {
+    /// The encoder state.
+    type Encoder: EncodeBytes + From<Self>;
+}
+
+/// Transforms given bytes and writes to the writer.
+///
+/// The encoder is allowed to be buffered (and probably should be).
+/// The design passing writer each time bypasses the need for GAT.
+pub trait EncodeBytes {
+    /// Transform the provided slice and write to the writer.
+    ///
+    /// This is similar to the `write_all` method on `io::Write`.
+    fn encode_chunk<W: fmt::Write>(&mut self, writer: &mut W, bytes: &[u8]) -> fmt::Result;
+
+    /// Write data in buffer (if any) to the writer.
+    fn flush<W: fmt::Write>(&mut self, writer: &mut W) -> fmt::Result;
+}
+
+/// Provides an instance of string-to-byte decoder.
+///
+/// This is basically a type constructor used in places where value arguments are not accepted.
+/// Such as the generic `serialize`.
+pub trait ByteDecoder<'a> {
+    /// Error returned when decoder can't be created.
+    ///
+    /// This is typically returned when string length is invalid.
+    type InitError: IntoDeError + fmt::Debug;
+
+    /// Error returned when decoding fails.
+    ///
+    /// This is typically returned when the input string contains malformed chars.
+    type DecodeError: IntoDeError + fmt::Debug;
+
+    /// The decoder state.
+    type Decoder: Iterator<Item=Result<u8, Self::DecodeError>>;
+
+    /// Constructs the decoder from string.
+    fn from_str(s: &'a str) -> Result<Self::Decoder, Self::InitError>;
+}
+
+/// Converts error into a type implementing `serde::de::Error`
+pub trait IntoDeError {
+    /// Performs the conversion.
+    fn into_de_error<E: serde::de::Error>(self) -> E;
+}
+
+struct BinWriter<S: SerializeSeq> {
+    serializer: S,
+    error: Option<S::Error>,
+}
+
+impl<S: SerializeSeq> io::Write for BinWriter<S> {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> { self.write_all(buf).map(|_| buf.len()) }
+
+    fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
+        for byte in buf {
+            if let Err(error) = self.serializer.serialize_element(byte) {
+                self.error = Some(error);
+                return Err(io::ErrorKind::Other.into());
+            }
+        }
+        Ok(())
+    }
+
+    fn flush(&mut self) -> io::Result<()> { Ok(()) }
+}
+
+struct DisplayExpected<D: fmt::Display>(D);
+
+impl<D: fmt::Display> serde::de::Expected for DisplayExpected<D> {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Display::fmt(&self.0, formatter)
+    }
+}
+
+enum DecodeError<E> {
+    TooManyBytes,
+    Consensus(ConsensusError),
+    Other(E),
+}
+
+// not a trait impl because we panic on some variants
+fn consensus_error_into_serde<E: serde::de::Error>(error: ConsensusError) -> E {
+    match error {
+        ConsensusError::Io(error) => panic!("unexpected IO error {:?}", error),
+        ConsensusError::OversizedVectorAllocation { requested, max } => E::custom(format_args!(
+            "the requested allocation of {} items exceeds maximum of {}",
+            requested, max
+        )),
+        ConsensusError::InvalidChecksum { expected, actual } => E::invalid_value(
+            Unexpected::Bytes(&actual),
+            &DisplayExpected(format_args!(
+                "checksum {:02x}{:02x}{:02x}{:02x}",
+                expected[0], expected[1], expected[2], expected[3]
+            )),
+        ),
+        ConsensusError::NonMinimalVarInt =>
+            E::custom(format_args!("compact size was not encoded minimally")),
+        ConsensusError::ParseFailed(msg) => E::custom(msg),
+        ConsensusError::UnsupportedSegwitFlag(flag) =>
+            E::invalid_value(Unexpected::Unsigned(flag.into()), &"segwit version 1 flag"),
+        ConsensusError::InvalidVectorSize { expected, actual } => E::invalid_value(
+            Unexpected::Unsigned(actual as u64),
+            &DisplayExpected(format_args!("{}", expected)),
+        ),
+        ConsensusError::UnknownSpecialTransactionType(tx_type) => E::invalid_value(
+            Unexpected::Unsigned(tx_type.into()),
+            &DisplayExpected("special transaction type"),
+        ),
+        ConsensusError::WrongSpecialTransactionPayloadConversion { expected, actual } => {
+            E::invalid_value(
+                Unexpected::Str(actual.to_string().as_str()),
+                &DisplayExpected(format_args!("expected transaction type: {}", expected.to_string())),
+            )
+        }
+        ConsensusError::NonStandardScriptPayout(script_buf) => E::invalid_value(
+            Unexpected::Other(script_buf.to_string().as_str()),
+            &DisplayExpected("standard scriptPubKey"),
+        ),
+        ConsensusError::Hex(error) => E::custom(error),
+        ConsensusError::Address(error) => E::custom(error),
+    }
+}
+
+impl<E> DecodeError<E>
+    where
+        E: serde::de::Error,
+{
+    fn unify(self) -> E {
+        match self {
+            DecodeError::Other(error) => error,
+            DecodeError::TooManyBytes => E::custom(format_args!("got more bytes than expected")),
+            DecodeError::Consensus(error) => consensus_error_into_serde(error),
+        }
+    }
+}
+
+impl<E> IntoDeError for DecodeError<E>
+    where
+        E: IntoDeError,
+{
+    fn into_de_error<DE: serde::de::Error>(self) -> DE {
+        match self {
+            DecodeError::Other(error) => error.into_de_error(),
+            DecodeError::TooManyBytes => DE::custom(format_args!("got more bytes than expected")),
+            DecodeError::Consensus(error) => consensus_error_into_serde(error),
+        }
+    }
+}
+
+struct IterReader<E: fmt::Debug, I: Iterator<Item=Result<u8, E>>> {
+    iterator: core::iter::Fuse<I>,
+    error: Option<E>,
+}
+
+impl<E: fmt::Debug, I: Iterator<Item=Result<u8, E>>> IterReader<E, I> {
+    fn new(iterator: I) -> Self { IterReader { iterator: iterator.fuse(), error: None } }
+
+    fn decode<T: Decodable>(mut self) -> Result<T, DecodeError<E>> {
+        use crate::StdError;
+
+        let result = T::consensus_decode(&mut self);
+        match (result, self.error) {
+            (Ok(_), None) if self.iterator.next().is_some() => {
+                Err(DecodeError::TooManyBytes)
+            }
+            (Ok(value), None) => Ok(value),
+            (Ok(_), Some(error)) => panic!("{} silently ate the error: {:?}", core::any::type_name::<T>(), error),
+            (Err(ConsensusError::Io(io_error)), Some(de_error)) if io_error.kind() == io::ErrorKind::Other && io_error.source().is_none() => Err(DecodeError::Other(de_error)),
+            (Err(consensus_error), None) => Err(DecodeError::Consensus(consensus_error)),
+            (Err(ConsensusError::Io(io_error)), de_error) => panic!("Unexpected IO error {:?} returned from {}::consensus_decode(), deserialization error: {:?}", io_error, core::any::type_name::<T>(), de_error),
+            (Err(consensus_error), Some(de_error)) => panic!("{} should've returned `Other` IO error because of deserialization error {:?} but it returned consensus error {:?} instead", core::any::type_name::<T>(), de_error, consensus_error),
+        }
+    }
+}
+
+impl<E: fmt::Debug, I: Iterator<Item=Result<u8, E>>> io::Read for IterReader<E, I> {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        let mut count = 0;
+        for (dst, src) in buf.iter_mut().zip(&mut self.iterator) {
+            match src {
+                Ok(byte) => *dst = byte,
+                Err(error) => {
+                    self.error = Some(error);
+                    return Err(io::ErrorKind::Other.into());
+                }
+            }
+            // bounded by the length of buf
+            count += 1;
+        }
+        Ok(count)
+    }
+}
+
+/// Helper for `#[serde(with = "")]`.
+///
+/// To (de)serialize a field using consensus encoding you can write e.g.:
+///
+/// ```
+/// use dashcore::consensus;
+/// use serde_derive::{Serialize, Deserialize};
+/// use dashcore::Transaction;
+///
+/// #[derive(Serialize, Deserialize)]
+/// # #[serde(crate = "actual_serde")]
+/// pub struct MyStruct {
+///     #[serde(with = "consensus::serde::With::<consensus::serde::Hex>")]
+///     tx: Transaction,
+/// }
+/// ```
+pub struct With<E>(PhantomData<E>);
+
+impl<E> With<E> {
+    /// Serializes the value as consensus-encoded
+    pub fn serialize<T: Encodable, S: Serializer>(
+        value: &T,
+        serializer: S,
+    ) -> Result<S::Ok, S::Error>
+        where
+            E: ByteEncoder,
+    {
+        if serializer.is_human_readable() {
+            serializer.collect_str(&DisplayWrapper::<'_, _, E>(value, Default::default()))
+        } else {
+            use crate::StdError;
+
+            let serializer = serializer.serialize_seq(None)?;
+            let mut writer = BinWriter { serializer, error: None };
+
+            let result = value.consensus_encode(&mut writer);
+            match (result, writer.error) {
+                (Ok(_), None) => writer.serializer.end(),
+                (Ok(_), Some(error)) =>
+                    panic!("{} silently ate an IO error: {:?}", core::any::type_name::<T>(), error),
+                (Err(io_error), Some(ser_error))
+                if io_error.kind() == io::ErrorKind::Other && io_error.source().is_none() =>
+                    Err(ser_error),
+                (Err(io_error), ser_error) => panic!(
+                    "{} returned an unexpected IO error: {:?} serialization error: {:?}",
+                    core::any::type_name::<T>(),
+                    io_error,
+                    ser_error
+                ),
+            }
+        }
+    }
+
+    /// Deserializes the value as consensus-encoded
+    pub fn deserialize<'d, T: Decodable, D: Deserializer<'d>>(
+        deserializer: D,
+    ) -> Result<T, D::Error>
+        where
+                for<'a> E: ByteDecoder<'a>,
+    {
+        if deserializer.is_human_readable() {
+            deserializer.deserialize_str(HRVisitor::<_, E>(Default::default()))
+        } else {
+            deserializer.deserialize_seq(BinVisitor(Default::default()))
+        }
+    }
+}
+
+struct HRVisitor<T: Decodable, D: for<'a> ByteDecoder<'a>>(PhantomData<fn() -> (T, D)>);
+
+impl<'de, T: Decodable, D: for<'a> ByteDecoder<'a>> Visitor<'de> for HRVisitor<T, D> {
+    type Value = T;
+
+    fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter.write_str("bytes encoded as a hex string")
+    }
+
+    fn visit_str<E: serde::de::Error>(self, s: &str) -> Result<T, E> {
+        let decoder = D::from_str(s).map_err(IntoDeError::into_de_error)?;
+        IterReader::new(decoder).decode().map_err(IntoDeError::into_de_error)
+    }
+}
+
+struct BinVisitor<T: Decodable>(PhantomData<fn() -> T>);
+
+impl<'de, T: Decodable> Visitor<'de> for BinVisitor<T> {
+    type Value = T;
+
+    fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter.write_str("a sequence of bytes")
+    }
+
+    fn visit_seq<S: SeqAccess<'de>>(self, s: S) -> Result<T, S::Error> {
+        IterReader::new(SeqIterator(s, Default::default())).decode().map_err(DecodeError::unify)
+    }
+}
+
+struct SeqIterator<'a, S: serde::de::SeqAccess<'a>>(S, PhantomData<&'a ()>);
+
+impl<'a, S: serde::de::SeqAccess<'a>> Iterator for SeqIterator<'a, S> {
+    type Item = Result<u8, S::Error>;
+
+    fn next(&mut self) -> Option<Self::Item> { self.0.next_element::<u8>().transpose() }
+}
diff --git a/dash/src/crypto/ecdsa.rs b/dash/src/crypto/ecdsa.rs
new file mode 100644
index 000000000..750c93ce7
--- /dev/null
+++ b/dash/src/crypto/ecdsa.rs
@@ -0,0 +1,237 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+//! ECDSA Bitcoin signatures.
+//!
+//! This module provides ECDSA signatures used Bitcoin that can be roundtrip (de)serialized.
+
+use core::str::FromStr;
+use core::{fmt, iter};
+
+use hashes::hex::{self, FromHex};
+use internals::hex::display::DisplayHex;
+use internals::write_err;
+use secp256k1;
+
+use crate::prelude::*;
+use crate::script::PushBytes;
+use crate::sighash::{EcdsaSighashType, NonStandardSighashType};
+
+const MAX_SIG_LEN: usize = 73;
+
+/// An ECDSA signature with the corresponding hash type.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Signature {
+    /// The underlying ECDSA Signature
+    pub sig: secp256k1::ecdsa::Signature,
+    /// The corresponding hash type
+    pub hash_ty: EcdsaSighashType,
+}
+
+impl Signature {
+    /// Constructs an ECDSA dash signature for [`EcdsaSighashType::All`].
+    pub fn sighash_all(sig: secp256k1::ecdsa::Signature) -> Signature {
+        Signature { sig, hash_ty: EcdsaSighashType::All }
+    }
+
+    /// Deserializes from slice following the standardness rules for [`EcdsaSighashType`].
+    pub fn from_slice(sl: &[u8]) -> Result<Self, Error> {
+        let (hash_ty, sig) = sl.split_last().ok_or(Error::EmptySignature)?;
+        let hash_ty = EcdsaSighashType::from_standard(*hash_ty as u32)
+            .map_err(|_| Error::NonStandardSighashType(*hash_ty as u32))?;
+        let sig = secp256k1::ecdsa::Signature::from_der(sig).map_err(Error::Secp256k1)?;
+        Ok(Signature { sig, hash_ty })
+    }
+
+    /// Serializes an ECDSA signature (inner secp256k1 signature in DER format).
+    ///
+    /// This does **not** perform extra heap allocation.
+    pub fn serialize(&self) -> SerializedSignature {
+        let mut buf = [0u8; MAX_SIG_LEN];
+        let signature = self.sig.serialize_der();
+        buf[..signature.len()].copy_from_slice(&signature);
+        buf[signature.len()] = self.hash_ty as u8;
+        SerializedSignature { data: buf, len: signature.len() + 1 }
+    }
+
+    /// Serializes an ECDSA signature (inner secp256k1 signature in DER format) into `Vec`.
+    ///
+    /// Note: this performs an extra heap allocation, you might prefer the
+    /// [`serialize`](Self::serialize) method instead.
+    pub fn to_vec(self) -> Vec<u8> {
+        // TODO: add support to serialize to a writer to SerializedSig
+        self.sig.serialize_der().iter().copied().chain(iter::once(self.hash_ty as u8)).collect()
+    }
+}
+
+impl fmt::Display for Signature {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::LowerHex::fmt(&self.sig.serialize_der().as_hex(), f)?;
+        fmt::LowerHex::fmt(&[self.hash_ty as u8].as_hex(), f)
+    }
+}
+
+impl FromStr for Signature {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let bytes = Vec::from_hex(s)?;
+        let (sighash_byte, signature) = bytes.split_last().ok_or(Error::EmptySignature)?;
+        Ok(Signature {
+            sig: secp256k1::ecdsa::Signature::from_der(signature)?,
+            hash_ty: EcdsaSighashType::from_standard(*sighash_byte as u32)?,
+        })
+    }
+}
+
+/// Holds signature serialized in-line (not in `Vec`).
+///
+/// This avoids allocation and allows proving maximum size of the signature (73 bytes).
+/// The type can be used largely as a byte slice. It implements all standard traits one would
+/// expect and has familiar methods.
+/// However, the usual use case is to push it into a script. This can be done directly passing it
+/// into [`push_slice`](crate::script::ScriptBuf::push_slice).
+#[derive(Copy, Clone)]
+pub struct SerializedSignature {
+    data: [u8; MAX_SIG_LEN],
+    len: usize,
+}
+
+impl SerializedSignature {
+    /// Returns an iterator over bytes of the signature.
+    #[inline]
+    pub fn iter(&self) -> core::slice::Iter<'_, u8> { self.into_iter() }
+}
+
+impl core::ops::Deref for SerializedSignature {
+    type Target = [u8];
+
+    #[inline]
+    fn deref(&self) -> &Self::Target { &self.data[..self.len] }
+}
+
+impl core::ops::DerefMut for SerializedSignature {
+    #[inline]
+    fn deref_mut(&mut self) -> &mut Self::Target { &mut self.data[..self.len] }
+}
+
+impl AsRef<[u8]> for SerializedSignature {
+    #[inline]
+    fn as_ref(&self) -> &[u8] { self }
+}
+
+impl AsMut<[u8]> for SerializedSignature {
+    #[inline]
+    fn as_mut(&mut self) -> &mut [u8] { self }
+}
+
+impl AsRef<PushBytes> for SerializedSignature {
+    #[inline]
+    fn as_ref(&self) -> &PushBytes { &<&PushBytes>::from(&self.data)[..self.len()] }
+}
+
+impl core::borrow::Borrow<[u8]> for SerializedSignature {
+    #[inline]
+    fn borrow(&self) -> &[u8] { self }
+}
+
+impl core::borrow::BorrowMut<[u8]> for SerializedSignature {
+    #[inline]
+    fn borrow_mut(&mut self) -> &mut [u8] { self }
+}
+
+impl fmt::Debug for SerializedSignature {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(self, f) }
+}
+
+impl fmt::Display for SerializedSignature {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::LowerHex::fmt(self, f) }
+}
+
+impl fmt::LowerHex for SerializedSignature {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::LowerHex::fmt(&(**self).as_hex(), f)
+    }
+}
+
+impl fmt::UpperHex for SerializedSignature {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::UpperHex::fmt(&(**self).as_hex(), f)
+    }
+}
+
+impl PartialEq for SerializedSignature {
+    #[inline]
+    fn eq(&self, other: &SerializedSignature) -> bool { **self == **other }
+}
+
+impl Eq for SerializedSignature {}
+
+impl core::hash::Hash for SerializedSignature {
+    fn hash<H: core::hash::Hasher>(&self, state: &mut H) { core::hash::Hash::hash(&**self, state) }
+}
+
+impl<'a> IntoIterator for &'a SerializedSignature {
+    type IntoIter = core::slice::Iter<'a, u8>;
+    type Item = &'a u8;
+
+    #[inline]
+    fn into_iter(self) -> Self::IntoIter { (*self).iter() }
+}
+
+/// A key-related error.
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+#[non_exhaustive]
+pub enum Error {
+    /// Hex encoding error
+    HexEncoding(hex::Error),
+    /// Base58 encoding error
+    NonStandardSighashType(u32),
+    /// Empty Signature
+    EmptySignature,
+    /// secp256k1-related error
+    Secp256k1(secp256k1::Error),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Error::HexEncoding(ref e) => write_err!(f, "Signature hex encoding error"; e),
+            Error::NonStandardSighashType(hash_ty) =>
+                write!(f, "Non standard signature hash type {}", hash_ty),
+            Error::EmptySignature => write!(f, "Empty ECDSA signature"),
+            Error::Secp256k1(ref e) => write_err!(f, "invalid ECDSA signature"; e),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match self {
+            HexEncoding(e) => Some(e),
+            Secp256k1(e) => Some(e),
+            NonStandardSighashType(_) | EmptySignature => None,
+        }
+    }
+}
+
+impl From<secp256k1::Error> for Error {
+    fn from(e: secp256k1::Error) -> Error { Error::Secp256k1(e) }
+}
+
+impl From<NonStandardSighashType> for Error {
+    fn from(err: NonStandardSighashType) -> Self { Error::NonStandardSighashType(err.0) }
+}
+
+impl From<hex::Error> for Error {
+    fn from(err: hex::Error) -> Self { Error::HexEncoding(err) }
+}
diff --git a/dash/src/crypto/key.rs b/dash/src/crypto/key.rs
new file mode 100644
index 000000000..3924faedb
--- /dev/null
+++ b/dash/src/crypto/key.rs
@@ -0,0 +1,1059 @@
+// Rust Dash Library
+// Originally written in 2014 by
+//     Andrew Poelstra <apoelstra@wpsoftware.net>
+//     For Dash
+// Updated for Dash in 2022 by
+//     The Dash Core Developers
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Dash keys.
+//!
+//! This module provides keys used in Dash that can be roundtrip
+//! (de)serialized.
+
+use core::fmt::{self, Write};
+use core::ops;
+use core::str::FromStr;
+
+use hashes::hex::FromHex;
+use hashes::{hash160, hex, Hash};
+use internals::write_err;
+pub use secp256k1::{self, constants, KeyPair, Parity, Secp256k1, Verification, XOnlyPublicKey};
+
+use crate::hash_types::{PubkeyHash, WPubkeyHash};
+use crate::network::constants::Network;
+use crate::prelude::*;
+use crate::taproot::{TapNodeHash, TapTweakHash};
+use crate::{base58, io};
+
+/// A key-related error.
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+#[non_exhaustive]
+pub enum Error {
+    /// Base58 encoding error
+    Base58(base58::Error),
+    /// secp256k1-related error
+    Secp256k1(secp256k1::Error),
+    /// Invalid key prefix error
+    InvalidKeyPrefix(u8),
+    /// Hex decoding error
+    Hex(hex::Error),
+    /// `PublicKey` hex should be 66 or 130 digits long.
+    InvalidHexLength(usize),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Error::Base58(ref e) => write_err!(f, "key base58 error"; e),
+            Error::Secp256k1(ref e) => write_err!(f, "key secp256k1 error"; e),
+            Error::InvalidKeyPrefix(ref b) => write!(f, "key prefix invalid: {}", b),
+            Error::Hex(ref e) => write_err!(f, "key hex decoding error"; e),
+            Error::InvalidHexLength(got) =>
+                write!(f, "PublicKey hex should be 66 or 130 digits long, got: {}", got),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match self {
+            Base58(e) => Some(e),
+            Secp256k1(e) => Some(e),
+            Hex(e) => Some(e),
+            InvalidKeyPrefix(_) | InvalidHexLength(_) => None,
+        }
+    }
+}
+
+#[doc(hidden)]
+impl From<base58::Error> for Error {
+    fn from(e: base58::Error) -> Error { Error::Base58(e) }
+}
+
+#[doc(hidden)]
+impl From<secp256k1::Error> for Error {
+    fn from(e: secp256k1::Error) -> Error { Error::Secp256k1(e) }
+}
+
+#[doc(hidden)]
+impl From<hex::Error> for Error {
+    fn from(e: hex::Error) -> Self { Error::Hex(e) }
+}
+
+/// A Dash ECDSA public key
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct PublicKey {
+    /// Whether this public key should be serialized as compressed
+    pub compressed: bool,
+    /// The actual ECDSA key
+    pub inner: secp256k1::PublicKey,
+}
+
+impl PublicKey {
+    /// Constructs compressed ECDSA public key from the provided generic Secp256k1 public key
+    pub fn new(key: impl Into<secp256k1::PublicKey>) -> PublicKey {
+        PublicKey { compressed: true, inner: key.into() }
+    }
+
+    /// Constructs uncompressed (legacy) ECDSA public key from the provided generic Secp256k1
+    /// public key
+    pub fn new_uncompressed(key: impl Into<secp256k1::PublicKey>) -> PublicKey {
+        PublicKey { compressed: false, inner: key.into() }
+    }
+
+    fn with_serialized<R, F: FnOnce(&[u8]) -> R>(&self, f: F) -> R {
+        if self.compressed {
+            f(&self.inner.serialize())
+        } else {
+            f(&self.inner.serialize_uncompressed())
+        }
+    }
+
+    /// Returns dash 160-bit hash of the public key
+    pub fn pubkey_hash(&self) -> PubkeyHash { self.with_serialized(PubkeyHash::hash) }
+
+    /// Returns dash 160-bit hash of the public key for witness program
+    pub fn wpubkey_hash(&self) -> Option<WPubkeyHash> {
+        if self.compressed {
+            Some(WPubkeyHash::from_byte_array(
+                hash160::Hash::hash(&self.inner.serialize()).to_byte_array(),
+            ))
+        } else {
+            // We can't create witness pubkey hashes for an uncompressed
+            // public keys
+            None
+        }
+    }
+
+    /// Write the public key into a writer
+    pub fn write_into<W: io::Write>(&self, mut writer: W) -> Result<(), io::Error> {
+        self.with_serialized(|bytes| writer.write_all(bytes))
+    }
+
+    /// Read the public key from a reader
+    ///
+    /// This internally reads the first byte before reading the rest, so
+    /// use of a `BufReader` is recommended.
+    pub fn read_from<R: io::Read>(mut reader: R) -> Result<Self, io::Error> {
+        let mut bytes = [0; 65];
+
+        reader.read_exact(&mut bytes[0..1])?;
+        let bytes = if bytes[0] < 4 { &mut bytes[..33] } else { &mut bytes[..65] };
+
+        reader.read_exact(&mut bytes[1..])?;
+        Self::from_slice(bytes).map_err(|e| {
+            // Need a static string for core2
+            #[cfg(feature = "std")]
+            let reason = e;
+            #[cfg(not(feature = "std"))]
+            let reason = match e {
+                Error::Base58(_) => "base58 error",
+                Error::Secp256k1(_) => "secp256k1 error",
+                Error::InvalidKeyPrefix(_) => "invalid key prefix",
+                Error::Hex(_) => "hex decoding error",
+                Error::InvalidHexLength(_) => "invalid hex string length",
+            };
+            io::Error::new(io::ErrorKind::InvalidData, reason)
+        })
+    }
+
+    /// Serialize the public key to bytes
+    pub fn to_bytes(self) -> Vec<u8> {
+        let mut buf = Vec::new();
+        self.write_into(&mut buf).expect("vecs don't error");
+        buf
+    }
+
+    /// Serialize the public key into a `SortKey`.
+    ///
+    /// `SortKey` is not too useful by itself, but it can be used to sort a
+    /// `[PublicKey]` slice using `sort_unstable_by_key`, `sort_by_cached_key`,
+    /// `sort_by_key`, or any of the other `*_by_key` methods on slice.
+    /// Pass the method into the sort method directly. (ie. `PublicKey::to_sort_key`)
+    ///
+    /// This method of sorting is in line with Dash Core's implementation of
+    /// sorting keys for output descriptors such as `sortedmulti()`.
+    ///
+    /// If every `PublicKey` in the slice is `compressed == true` then this will sort
+    /// the keys in a
+    /// [BIP67](https://github.com/bitcoin/bips/blob/master/bip-0067.mediawiki)
+    /// compliant way.
+    ///
+    /// # Example: Using with `sort_unstable_by_key`
+    ///
+    /// ```rust
+    /// use std::str::FromStr;
+    /// use dashcore::PublicKey;
+    ///
+    /// let pk = |s| PublicKey::from_str(s).unwrap();
+    ///
+    /// let mut unsorted = [
+    ///     pk("04c4b0bbb339aa236bff38dbe6a451e111972a7909a126bc424013cba2ec33bc38e98ac269ffe028345c31ac8d0a365f29c8f7e7cfccac72f84e1acd02bc554f35"),
+    ///     pk("038f47dcd43ba6d97fc9ed2e3bba09b175a45fac55f0683e8cf771e8ced4572354"),
+    ///     pk("028bde91b10013e08949a318018fedbd896534a549a278e220169ee2a36517c7aa"),
+    ///     pk("04c4b0bbb339aa236bff38dbe6a451e111972a7909a126bc424013cba2ec33bc3816753d96001fd7cba3ce5372f5c9a0d63708183033538d07b1e532fc43aaacfa"),
+    ///     pk("032b8324c93575034047a52e9bca05a46d8347046b91a032eff07d5de8d3f2730b"),
+    ///     pk("045d753414fa292ea5b8f56e39cfb6a0287b2546231a5cb05c4b14ab4b463d171f5128148985b23eccb1e2905374873b1f09b9487f47afa6b1f2b0083ac8b4f7e8"),
+    ///     pk("0234dd69c56c36a41230d573d68adeae0030c9bc0bf26f24d3e1b64c604d293c68"),
+    /// ];
+    /// let sorted = [
+    ///     // These first 4 keys are in a BIP67 compatible sorted order
+    ///     // (since they are compressed)
+    ///     pk("0234dd69c56c36a41230d573d68adeae0030c9bc0bf26f24d3e1b64c604d293c68"),
+    ///     pk("028bde91b10013e08949a318018fedbd896534a549a278e220169ee2a36517c7aa"),
+    ///     pk("032b8324c93575034047a52e9bca05a46d8347046b91a032eff07d5de8d3f2730b"),
+    ///     pk("038f47dcd43ba6d97fc9ed2e3bba09b175a45fac55f0683e8cf771e8ced4572354"),
+    ///     // Uncompressed keys are not BIP67 compliant, but are sorted
+    ///     // after compressed keys in Dash Core using `sortedmulti()`
+    ///     pk("045d753414fa292ea5b8f56e39cfb6a0287b2546231a5cb05c4b14ab4b463d171f5128148985b23eccb1e2905374873b1f09b9487f47afa6b1f2b0083ac8b4f7e8"),
+    ///     pk("04c4b0bbb339aa236bff38dbe6a451e111972a7909a126bc424013cba2ec33bc3816753d96001fd7cba3ce5372f5c9a0d63708183033538d07b1e532fc43aaacfa"),
+    ///     pk("04c4b0bbb339aa236bff38dbe6a451e111972a7909a126bc424013cba2ec33bc38e98ac269ffe028345c31ac8d0a365f29c8f7e7cfccac72f84e1acd02bc554f35"),
+    /// ];
+    ///
+    /// unsorted.sort_unstable_by_key(|k| PublicKey::to_sort_key(*k));
+    ///
+    /// assert_eq!(unsorted, sorted);
+    /// ```
+    pub fn to_sort_key(self) -> SortKey {
+        if self.compressed {
+            let bytes = self.inner.serialize();
+            let mut res = [0; 32];
+            res[..].copy_from_slice(&bytes[1..33]);
+            SortKey(bytes[0], res, [0; 32])
+        } else {
+            let bytes = self.inner.serialize_uncompressed();
+            let mut res_left = [0; 32];
+            let mut res_right = [0; 32];
+            res_left[..].copy_from_slice(&bytes[1..33]);
+            res_right[..].copy_from_slice(&bytes[33..65]);
+            SortKey(bytes[0], res_left, res_right)
+        }
+    }
+
+    /// Deserialize a public key from a slice
+    pub fn from_slice(data: &[u8]) -> Result<PublicKey, Error> {
+        let compressed = match data.len() {
+            33 => true,
+            65 => false,
+            len => {
+                return Err(base58::Error::InvalidLength(len).into());
+            }
+        };
+
+        if !compressed && data[0] != 0x04 {
+            return Err(Error::InvalidKeyPrefix(data[0]));
+        }
+
+        Ok(PublicKey { compressed, inner: secp256k1::PublicKey::from_slice(data)? })
+    }
+
+    /// Computes the public key as supposed to be used with this secret
+    pub fn from_private_key<C: secp256k1::Signing>(
+        secp: &Secp256k1<C>,
+        sk: &PrivateKey,
+    ) -> PublicKey {
+        sk.public_key(secp)
+    }
+}
+
+/// An opaque return type for PublicKey::to_sort_key
+#[derive(Debug, Hash, PartialEq, Eq, PartialOrd, Ord, Clone, Copy)]
+pub struct SortKey(u8, [u8; 32], [u8; 32]);
+
+impl fmt::Display for PublicKey {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        // TODO: fast hex encoding
+        self.with_serialized(|bytes| {
+            for ch in bytes {
+                write!(f, "{:02x}", ch)?;
+            }
+            Ok(())
+        })
+    }
+}
+
+impl FromStr for PublicKey {
+    type Err = Error;
+    fn from_str(s: &str) -> Result<PublicKey, Error> {
+        match s.len() {
+            66 => PublicKey::from_slice(&<[u8; 33]>::from_hex(s)?),
+            130 => PublicKey::from_slice(&<[u8; 65]>::from_hex(s)?),
+            len => Err(Error::InvalidHexLength(len)),
+        }
+    }
+}
+
+impl From<PublicKey> for PubkeyHash {
+    fn from(key: PublicKey) -> PubkeyHash { key.pubkey_hash() }
+}
+
+/// A Dash ECDSA private key
+#[derive(Copy, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "std", derive(Debug))]
+pub struct PrivateKey {
+    /// Whether this private key should be serialized as compressed
+    pub compressed: bool,
+    /// The network on which this key should be used
+    pub network: Network,
+    /// The actual ECDSA key
+    pub inner: secp256k1::SecretKey,
+}
+
+impl PrivateKey {
+    /// Constructs compressed ECDSA private key from the provided generic Secp256k1 private key
+    /// and the specified network
+    pub fn new(key: secp256k1::SecretKey, network: Network) -> PrivateKey {
+        PrivateKey { compressed: true, network, inner: key }
+    }
+
+    /// Constructs uncompressed (legacy) ECDSA private key from the provided generic Secp256k1
+    /// private key and the specified network
+    pub fn new_uncompressed(key: secp256k1::SecretKey, network: Network) -> PrivateKey {
+        PrivateKey { compressed: false, network, inner: key }
+    }
+
+    /// Creates a public key from this private key
+    pub fn public_key<C: secp256k1::Signing>(&self, secp: &Secp256k1<C>) -> PublicKey {
+        PublicKey {
+            compressed: self.compressed,
+            inner: secp256k1::PublicKey::from_secret_key(secp, &self.inner),
+        }
+    }
+
+    /// Serialize the private key to bytes
+    pub fn to_bytes(self) -> Vec<u8> { self.inner[..].to_vec() }
+
+    /// Deserialize a private key from a slice
+    pub fn from_slice(data: &[u8], network: Network) -> Result<PrivateKey, Error> {
+        Ok(PrivateKey::new(secp256k1::SecretKey::from_slice(data)?, network))
+    }
+
+    /// Format the private key to WIF format.
+    pub fn fmt_wif(&self, fmt: &mut dyn fmt::Write) -> fmt::Result {
+        let mut ret = [0; 34];
+        ret[0] = match self.network {
+            Network::Dash => 128,
+            Network::Testnet | Network::Devnet | Network::Regtest => 239,
+        };
+        ret[1..33].copy_from_slice(&self.inner[..]);
+        let privkey = if self.compressed {
+            ret[33] = 1;
+            base58::encode_check(&ret[..])
+        } else {
+            base58::encode_check(&ret[..33])
+        };
+        fmt.write_str(&privkey)
+    }
+
+    /// Get WIF encoding of this private key.
+    pub fn to_wif(self) -> String {
+        let mut buf = String::new();
+        buf.write_fmt(format_args!("{}", self)).unwrap();
+        buf.shrink_to_fit();
+        buf
+    }
+
+    /// Parse WIF encoded private key.
+    pub fn from_wif(wif: &str) -> Result<PrivateKey, Error> {
+        let data = base58::decode_check(wif)?;
+
+        let compressed = match data.len() {
+            33 => false,
+            34 => true,
+            _ => {
+                return Err(Error::Base58(base58::Error::InvalidLength(data.len())));
+            }
+        };
+
+        let network = match data[0] {
+            128 => Network::Dash,
+            239 => Network::Testnet,
+            x => {
+                return Err(Error::Base58(base58::Error::InvalidAddressVersion(x)));
+            }
+        };
+
+        Ok(PrivateKey {
+            compressed,
+            network,
+            inner: secp256k1::SecretKey::from_slice(&data[1..33])?,
+        })
+    }
+}
+
+impl fmt::Display for PrivateKey {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { self.fmt_wif(f) }
+}
+
+#[cfg(not(feature = "std"))]
+impl fmt::Debug for PrivateKey {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { write!(f, "[private key data]") }
+}
+
+impl FromStr for PrivateKey {
+    type Err = Error;
+    fn from_str(s: &str) -> Result<PrivateKey, Error> { PrivateKey::from_wif(s) }
+}
+
+impl ops::Index<ops::RangeFull> for PrivateKey {
+    type Output = [u8];
+    fn index(&self, _: ops::RangeFull) -> &[u8] { &self.inner[..] }
+}
+
+#[cfg(feature = "serde")]
+impl serde::Serialize for PrivateKey {
+    fn serialize<S: serde::Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
+        s.collect_str(self)
+    }
+}
+
+#[cfg(feature = "serde")]
+impl<'de> serde::Deserialize<'de> for PrivateKey {
+    fn deserialize<D: serde::Deserializer<'de>>(d: D) -> Result<PrivateKey, D::Error> {
+        struct WifVisitor;
+
+        impl<'de> serde::de::Visitor<'de> for WifVisitor {
+            type Value = PrivateKey;
+
+            fn expecting(&self, formatter: &mut core::fmt::Formatter) -> core::fmt::Result {
+                formatter.write_str("an ASCII WIF string")
+            }
+
+            fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
+            where
+                E: serde::de::Error,
+            {
+                if let Ok(s) = core::str::from_utf8(v) {
+                    PrivateKey::from_str(s).map_err(E::custom)
+                } else {
+                    Err(E::invalid_value(::serde::de::Unexpected::Bytes(v), &self))
+                }
+            }
+
+            fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+            where
+                E: serde::de::Error,
+            {
+                PrivateKey::from_str(v).map_err(E::custom)
+            }
+        }
+
+        d.deserialize_str(WifVisitor)
+    }
+}
+
+#[cfg(feature = "serde")]
+#[allow(clippy::collapsible_else_if)] // Aids readability.
+impl serde::Serialize for PublicKey {
+    fn serialize<S: serde::Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
+        if s.is_human_readable() {
+            s.collect_str(self)
+        } else {
+            self.with_serialized(|bytes| s.serialize_bytes(bytes))
+        }
+    }
+}
+
+#[cfg(feature = "serde")]
+impl<'de> serde::Deserialize<'de> for PublicKey {
+    fn deserialize<D: serde::Deserializer<'de>>(d: D) -> Result<PublicKey, D::Error> {
+        if d.is_human_readable() {
+            struct HexVisitor;
+
+            impl<'de> serde::de::Visitor<'de> for HexVisitor {
+                type Value = PublicKey;
+
+                fn expecting(&self, formatter: &mut core::fmt::Formatter) -> core::fmt::Result {
+                    formatter.write_str("an ASCII hex string")
+                }
+
+                fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
+                where
+                    E: serde::de::Error,
+                {
+                    if let Ok(hex) = core::str::from_utf8(v) {
+                        PublicKey::from_str(hex).map_err(E::custom)
+                    } else {
+                        Err(E::invalid_value(::serde::de::Unexpected::Bytes(v), &self))
+                    }
+                }
+
+                fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+                where
+                    E: serde::de::Error,
+                {
+                    PublicKey::from_str(v).map_err(E::custom)
+                }
+            }
+            d.deserialize_str(HexVisitor)
+        } else {
+            struct BytesVisitor;
+
+            impl<'de> serde::de::Visitor<'de> for BytesVisitor {
+                type Value = PublicKey;
+
+                fn expecting(&self, formatter: &mut core::fmt::Formatter) -> core::fmt::Result {
+                    formatter.write_str("a bytestring")
+                }
+
+                fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
+                where
+                    E: serde::de::Error,
+                {
+                    PublicKey::from_slice(v).map_err(E::custom)
+                }
+            }
+
+            d.deserialize_bytes(BytesVisitor)
+        }
+    }
+}
+
+/// Untweaked BIP-340 X-coord-only public key
+pub type UntweakedPublicKey = XOnlyPublicKey;
+
+/// Tweaked BIP-340 X-coord-only public key
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+#[cfg_attr(feature = "serde", serde(transparent))]
+pub struct TweakedPublicKey(XOnlyPublicKey);
+
+impl fmt::LowerHex for TweakedPublicKey {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::LowerHex::fmt(&self.0, f) }
+}
+
+impl fmt::Display for TweakedPublicKey {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(&self.0, f) }
+}
+
+/// Untweaked BIP-340 key pair
+pub type UntweakedKeyPair = KeyPair;
+
+/// Tweaked BIP-340 key pair
+///
+/// # Examples
+/// ```
+/// # #[cfg(feature = "rand-std")] {
+/// # use dashcore::key::{KeyPair, TweakedKeyPair, TweakedPublicKey};
+/// # use dashcore::secp256k1::{rand, Secp256k1};
+/// # let secp = Secp256k1::new();
+/// # let keypair = TweakedKeyPair::dangerous_assume_tweaked(KeyPair::new(&secp, &mut rand::thread_rng()));
+/// // There are various conversion methods available to get a tweaked pubkey from a tweaked keypair.
+/// let (_pk, _parity) = keypair.public_parts();
+/// let _pk  = TweakedPublicKey::from_keypair(keypair);
+/// let _pk = TweakedPublicKey::from(keypair);
+/// # }
+/// ```
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+#[cfg_attr(feature = "serde", serde(transparent))]
+pub struct TweakedKeyPair(KeyPair);
+
+/// A trait for tweaking BIP340 key types (x-only public keys and key pairs).
+pub trait TapTweak {
+    /// Tweaked key type with optional auxiliary information
+    type TweakedAux;
+    /// Tweaked key type
+    type TweakedKey;
+
+    /// Tweaks an untweaked key with corresponding public key value and optional script tree merkle
+    /// root. For the [`KeyPair`] type this also tweaks the private key in the pair.
+    ///
+    /// This is done by using the equation Q = P + H(P|c)G, where
+    ///  * Q is the tweaked public key
+    ///  * P is the internal public key
+    ///  * H is the hash function
+    ///  * c is the commitment data
+    ///  * G is the generator point
+    ///
+    /// # Returns
+    /// The tweaked key and its parity.
+    fn tap_tweak<C: Verification>(
+        self,
+        secp: &Secp256k1<C>,
+        merkle_root: Option<TapNodeHash>,
+    ) -> Self::TweakedAux;
+
+    /// Directly converts an [`UntweakedPublicKey`] to a [`TweakedPublicKey`]
+    ///
+    /// This method is dangerous and can lead to loss of funds if used incorrectly.
+    /// Specifically, in multi-party protocols a peer can provide a value that allows them to steal.
+    fn dangerous_assume_tweaked(self) -> Self::TweakedKey;
+}
+
+impl TapTweak for UntweakedPublicKey {
+    type TweakedAux = (TweakedPublicKey, Parity);
+    type TweakedKey = TweakedPublicKey;
+
+    /// Tweaks an untweaked public key with corresponding public key value and optional script tree
+    /// merkle root.
+    ///
+    /// This is done by using the equation Q = P + H(P|c)G, where
+    ///  * Q is the tweaked public key
+    ///  * P is the internal public key
+    ///  * H is the hash function
+    ///  * c is the commitment data
+    ///  * G is the generator point
+    ///
+    /// # Returns
+    /// The tweaked key and its parity.
+    fn tap_tweak<C: Verification>(
+        self,
+        secp: &Secp256k1<C>,
+        merkle_root: Option<TapNodeHash>,
+    ) -> (TweakedPublicKey, Parity) {
+        let tweak = TapTweakHash::from_key_and_tweak(self, merkle_root).to_scalar();
+        let (output_key, parity) = self.add_tweak(secp, &tweak).expect("Tap tweak failed");
+
+        debug_assert!(self.tweak_add_check(secp, &output_key, parity, tweak));
+        (TweakedPublicKey(output_key), parity)
+    }
+
+    fn dangerous_assume_tweaked(self) -> TweakedPublicKey { TweakedPublicKey(self) }
+}
+
+impl TapTweak for UntweakedKeyPair {
+    type TweakedAux = TweakedKeyPair;
+    type TweakedKey = TweakedKeyPair;
+
+    /// Tweaks private and public keys within an untweaked [`KeyPair`] with corresponding public key
+    /// value and optional script tree merkle root.
+    ///
+    /// This is done by tweaking private key within the pair using the equation q = p + H(P|c), where
+    ///  * q is the tweaked private key
+    ///  * p is the internal private key
+    ///  * H is the hash function
+    ///  * c is the commitment data
+    /// The public key is generated from a private key by multiplying with generator point, Q = qG.
+    ///
+    /// # Returns
+    /// The tweaked key and its parity.
+    fn tap_tweak<C: Verification>(
+        self,
+        secp: &Secp256k1<C>,
+        merkle_root: Option<TapNodeHash>,
+    ) -> TweakedKeyPair {
+        let (pubkey, _parity) = XOnlyPublicKey::from_keypair(&self);
+        let tweak = TapTweakHash::from_key_and_tweak(pubkey, merkle_root).to_scalar();
+        let tweaked = self.add_xonly_tweak(secp, &tweak).expect("Tap tweak failed");
+        TweakedKeyPair(tweaked)
+    }
+
+    fn dangerous_assume_tweaked(self) -> TweakedKeyPair { TweakedKeyPair(self) }
+}
+
+impl TweakedPublicKey {
+    /// Returns the [`TweakedPublicKey`] for `keypair`.
+    #[inline]
+    pub fn from_keypair(keypair: TweakedKeyPair) -> Self {
+        let (xonly, _parity) = keypair.0.x_only_public_key();
+        TweakedPublicKey(xonly)
+    }
+
+    /// Creates a new [`TweakedPublicKey`] from a [`XOnlyPublicKey`]. No tweak is applied, consider
+    /// calling `tap_tweak` on an [`UntweakedPublicKey`] instead of using this constructor.
+    ///
+    /// This method is dangerous and can lead to loss of funds if used incorrectly.
+    /// Specifically, in multi-party protocols a peer can provide a value that allows them to steal.
+    #[inline]
+    pub fn dangerous_assume_tweaked(key: XOnlyPublicKey) -> TweakedPublicKey {
+        TweakedPublicKey(key)
+    }
+
+    /// Returns the underlying public key.
+    pub fn to_inner(self) -> XOnlyPublicKey { self.0 }
+
+    /// Serialize the key as a byte-encoded pair of values. In compressed form
+    /// the y-coordinate is represented by only a single bit, as x determines
+    /// it up to one bit.
+    #[inline]
+    pub fn serialize(&self) -> [u8; constants::SCHNORR_PUBLIC_KEY_SIZE] { self.0.serialize() }
+}
+
+impl TweakedKeyPair {
+    /// Creates a new [`TweakedKeyPair`] from a [`KeyPair`]. No tweak is applied, consider
+    /// calling `tap_tweak` on an [`UntweakedKeyPair`] instead of using this constructor.
+    ///
+    /// This method is dangerous and can lead to loss of funds if used incorrectly.
+    /// Specifically, in multi-party protocols a peer can provide a value that allows them to steal.
+    #[inline]
+    pub fn dangerous_assume_tweaked(pair: KeyPair) -> TweakedKeyPair { TweakedKeyPair(pair) }
+
+    /// Returns the underlying key pair.
+    #[inline]
+    pub fn to_inner(self) -> KeyPair { self.0 }
+
+    /// Returns the [`TweakedPublicKey`] and its [`Parity`] for this [`TweakedKeyPair`].
+    #[inline]
+    pub fn public_parts(&self) -> (TweakedPublicKey, Parity) {
+        let (xonly, parity) = self.0.x_only_public_key();
+        (TweakedPublicKey(xonly), parity)
+    }
+}
+
+impl From<TweakedPublicKey> for XOnlyPublicKey {
+    #[inline]
+    fn from(pair: TweakedPublicKey) -> Self { pair.0 }
+}
+
+impl From<TweakedKeyPair> for KeyPair {
+    #[inline]
+    fn from(pair: TweakedKeyPair) -> Self { pair.0 }
+}
+
+impl From<TweakedKeyPair> for TweakedPublicKey {
+    #[inline]
+    fn from(pair: TweakedKeyPair) -> Self { TweakedPublicKey::from_keypair(pair) }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::str::FromStr;
+
+    use hashes::hex::FromHex;
+    use secp256k1::Secp256k1;
+
+    use super::*;
+    use crate::address::Address;
+    use crate::io;
+    use crate::network::constants::Network::{Dash, Testnet};
+
+    #[test]
+    fn test_key_derivation() {
+        // testnet compressed
+        let sk = PrivateKey::from_wif("cVt4o7BGAig1UXywgGSmARhxMdzP5qvQsxKkSsc1XEkw3tDTQFpy").unwrap();
+        assert_eq!(sk.network, Testnet);
+        assert_eq!(sk.compressed, true);
+        assert_eq!(&sk.to_wif(), "cVt4o7BGAig1UXywgGSmARhxMdzP5qvQsxKkSsc1XEkw3tDTQFpy");
+
+        let secp = Secp256k1::new();
+        let pk = Address::p2pkh(&sk.public_key(&secp), sk.network);
+        assert_eq!(&pk.to_string(), "yWkKX7a2WGr14hRyr4rC6NUC8n5F4dX3zr");
+
+        // test string conversion
+        assert_eq!(&sk.to_string(), "cVt4o7BGAig1UXywgGSmARhxMdzP5qvQsxKkSsc1XEkw3tDTQFpy");
+        let sk_str =
+            PrivateKey::from_str("cVt4o7BGAig1UXywgGSmARhxMdzP5qvQsxKkSsc1XEkw3tDTQFpy").unwrap();
+        assert_eq!(&sk.to_wif(), &sk_str.to_wif());
+
+        // mainnet uncompressed
+        let sk = PrivateKey::from_wif("5JYkZjmN7PVMjJUfJWfRFwtuXTGB439XV6faajeHPAM9Z2PT2R3").unwrap();
+        assert_eq!(sk.network, Dash);
+        assert_eq!(sk.compressed, false);
+        assert_eq!(&sk.to_wif(), "5JYkZjmN7PVMjJUfJWfRFwtuXTGB439XV6faajeHPAM9Z2PT2R3");
+
+        let secp = Secp256k1::new();
+        let mut pk = sk.public_key(&secp);
+        assert_eq!(pk.compressed, false);
+        assert_eq!(&pk.to_string(), "042e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af191923a2964c177f5b5923ae500fca49e99492d534aa3759d6b25a8bc971b133");
+        assert_eq!(pk, PublicKey::from_str("042e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af191923a2964c177f5b5923ae500fca49e99492d534aa3759d6b25a8bc971b133").unwrap());
+        let addr = Address::p2pkh(&pk, sk.network);
+        assert_eq!(&addr.to_string(), "XrPFkVkXHrBAFsnYCfpz996fkCXqZAzuEm");
+        pk.compressed = true;
+        assert_eq!(&pk.to_string(), "032e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af");
+        assert_eq!(pk, PublicKey::from_str("032e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af").unwrap());
+    }
+
+    #[test]
+    fn test_pubkey_hash() {
+        let pk = PublicKey::from_str(
+            "032e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af",
+        )
+        .unwrap();
+        let upk = PublicKey::from_str("042e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af191923a2964c177f5b5923ae500fca49e99492d534aa3759d6b25a8bc971b133").unwrap();
+        assert_eq!(pk.pubkey_hash().to_string(), "9511aa27ef39bbfa4e4f3dd15f4d66ea57f475b4");
+        assert_eq!(upk.pubkey_hash().to_string(), "ac2e7daf42d2c97418fd9f78af2de552bb9c6a7a");
+    }
+
+    #[test]
+    fn test_wpubkey_hash() {
+        let pk = PublicKey::from_str(
+            "032e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af",
+        )
+        .unwrap();
+        let upk = PublicKey::from_str("042e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af191923a2964c177f5b5923ae500fca49e99492d534aa3759d6b25a8bc971b133").unwrap();
+        assert_eq!(
+            pk.wpubkey_hash().unwrap().to_string(),
+            "9511aa27ef39bbfa4e4f3dd15f4d66ea57f475b4"
+        );
+        assert_eq!(upk.wpubkey_hash(), None);
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn test_key_serde() {
+        use serde_test::{assert_tokens, Configure, Token};
+
+        static KEY_WIF: &str = "cVt4o7BGAig1UXywgGSmARhxMdzP5qvQsxKkSsc1XEkw3tDTQFpy";
+        static PK_STR: &str = "039b6347398505f5ec93826dc61c19f47c66c0283ee9be980e29ce325a0f4679ef";
+        static PK_STR_U: &str = "\
+            04\
+            9b6347398505f5ec93826dc61c19f47c66c0283ee9be980e29ce325a0f4679ef\
+            87288ed73ce47fc4f5c79d19ebfa57da7cff3aff6e819e4ee971d86b5e61875d\
+        ";
+        #[rustfmt::skip]
+        static PK_BYTES: [u8; 33] = [
+            0x03,
+            0x9b, 0x63, 0x47, 0x39, 0x85, 0x05, 0xf5, 0xec,
+            0x93, 0x82, 0x6d, 0xc6, 0x1c, 0x19, 0xf4, 0x7c,
+            0x66, 0xc0, 0x28, 0x3e, 0xe9, 0xbe, 0x98, 0x0e,
+            0x29, 0xce, 0x32, 0x5a, 0x0f, 0x46, 0x79, 0xef,
+        ];
+        #[rustfmt::skip]
+        static PK_BYTES_U: [u8; 65] = [
+            0x04,
+            0x9b, 0x63, 0x47, 0x39, 0x85, 0x05, 0xf5, 0xec,
+            0x93, 0x82, 0x6d, 0xc6, 0x1c, 0x19, 0xf4, 0x7c,
+            0x66, 0xc0, 0x28, 0x3e, 0xe9, 0xbe, 0x98, 0x0e,
+            0x29, 0xce, 0x32, 0x5a, 0x0f, 0x46, 0x79, 0xef,
+            0x87, 0x28, 0x8e, 0xd7, 0x3c, 0xe4, 0x7f, 0xc4,
+            0xf5, 0xc7, 0x9d, 0x19, 0xeb, 0xfa, 0x57, 0xda,
+            0x7c, 0xff, 0x3a, 0xff, 0x6e, 0x81, 0x9e, 0x4e,
+            0xe9, 0x71, 0xd8, 0x6b, 0x5e, 0x61, 0x87, 0x5d,
+        ];
+
+        let s = Secp256k1::new();
+        let sk = PrivateKey::from_str(KEY_WIF).unwrap();
+        let pk = PublicKey::from_private_key(&s, &sk);
+        let pk_u = PublicKey { inner: pk.inner, compressed: false };
+
+        assert_tokens(&sk, &[Token::BorrowedStr(KEY_WIF)]);
+        assert_tokens(&pk.compact(), &[Token::BorrowedBytes(&PK_BYTES[..])]);
+        assert_tokens(&pk.readable(), &[Token::BorrowedStr(PK_STR)]);
+        assert_tokens(&pk_u.compact(), &[Token::BorrowedBytes(&PK_BYTES_U[..])]);
+        assert_tokens(&pk_u.readable(), &[Token::BorrowedStr(PK_STR_U)]);
+    }
+
+    fn random_key(mut seed: u8) -> PublicKey {
+        loop {
+            let mut data = [0; 65];
+            for byte in &mut data[..] {
+                *byte = seed;
+                // totally a rng
+                seed = seed.wrapping_mul(41).wrapping_add(43);
+            }
+            if data[0] % 2 == 0 {
+                data[0] = 4;
+                if let Ok(key) = PublicKey::from_slice(&data[..]) {
+                    return key;
+                }
+            } else {
+                data[0] = 2 + (data[0] >> 7);
+                if let Ok(key) = PublicKey::from_slice(&data[..33]) {
+                    return key;
+                }
+            }
+        }
+    }
+
+    #[test]
+    fn pubkey_read_write() {
+        const N_KEYS: usize = 20;
+        let keys: Vec<_> = (0..N_KEYS).map(|i| random_key(i as u8)).collect();
+
+        let mut v = vec![];
+        for k in &keys {
+            k.write_into(&mut v).expect("writing into vec");
+        }
+
+        let mut dec_keys = vec![];
+        let mut cursor = io::Cursor::new(&v);
+        for _ in 0..N_KEYS {
+            dec_keys.push(PublicKey::read_from(&mut cursor).expect("reading from vec"));
+        }
+
+        assert_eq!(keys, dec_keys);
+
+        // sanity checks
+        assert!(PublicKey::read_from(&mut cursor).is_err());
+        assert!(PublicKey::read_from(io::Cursor::new(&[])).is_err());
+        assert!(PublicKey::read_from(io::Cursor::new(&[0; 33][..])).is_err());
+        assert!(PublicKey::read_from(io::Cursor::new(&[2; 32][..])).is_err());
+        assert!(PublicKey::read_from(io::Cursor::new(&[0; 65][..])).is_err());
+        assert!(PublicKey::read_from(io::Cursor::new(&[4; 64][..])).is_err());
+    }
+
+    #[test]
+    fn pubkey_to_sort_key() {
+        let key1 = PublicKey::from_str(
+            "02ff12471208c14bd580709cb2358d98975247d8765f92bc25eab3b2763ed605f8",
+        )
+        .unwrap();
+        let key2 = PublicKey { inner: key1.inner, compressed: false };
+        let expected1 = SortKey(
+            2,
+            <[u8; 32]>::from_hex(
+                "ff12471208c14bd580709cb2358d98975247d8765f92bc25eab3b2763ed605f8",
+            )
+            .unwrap(),
+            [0_u8; 32],
+        );
+        let expected2 = SortKey(
+            4,
+            <[u8; 32]>::from_hex(
+                "ff12471208c14bd580709cb2358d98975247d8765f92bc25eab3b2763ed605f8",
+            )
+            .unwrap(),
+            <[u8; 32]>::from_hex(
+                "1794e7f3d5e420641a3bc690067df5541470c966cbca8c694bf39aa16d836918",
+            )
+            .unwrap(),
+        );
+        assert_eq!(key1.to_sort_key(), expected1);
+        assert_eq!(key2.to_sort_key(), expected2);
+    }
+
+    #[test]
+    fn pubkey_sort() {
+        struct Vector {
+            input: Vec<PublicKey>,
+            expect: Vec<PublicKey>,
+        }
+        let fmt =
+            |v: Vec<_>| v.into_iter().map(|s| PublicKey::from_str(s).unwrap()).collect::<Vec<_>>();
+        let vectors = vec![
+            // Start BIP67 vectors
+            // Vector 1
+            Vector {
+                input: fmt(vec![
+                    "02ff12471208c14bd580709cb2358d98975247d8765f92bc25eab3b2763ed605f8",
+                    "02fe6f0a5a297eb38c391581c4413e084773ea23954d93f7753db7dc0adc188b2f",
+                ]),
+                expect: fmt(vec![
+                    "02fe6f0a5a297eb38c391581c4413e084773ea23954d93f7753db7dc0adc188b2f",
+                    "02ff12471208c14bd580709cb2358d98975247d8765f92bc25eab3b2763ed605f8",
+                ]),
+            },
+            // Vector 2 (Already sorted, no action required)
+            Vector {
+                input: fmt(vec![
+                    "02632b12f4ac5b1d1b72b2a3b508c19172de44f6f46bcee50ba33f3f9291e47ed0",
+                    "027735a29bae7780a9755fae7a1c4374c656ac6a69ea9f3697fda61bb99a4f3e77",
+                    "02e2cc6bd5f45edd43bebe7cb9b675f0ce9ed3efe613b177588290ad188d11b404",
+                ]),
+                expect: fmt(vec![
+                    "02632b12f4ac5b1d1b72b2a3b508c19172de44f6f46bcee50ba33f3f9291e47ed0",
+                    "027735a29bae7780a9755fae7a1c4374c656ac6a69ea9f3697fda61bb99a4f3e77",
+                    "02e2cc6bd5f45edd43bebe7cb9b675f0ce9ed3efe613b177588290ad188d11b404",
+                ]),
+            },
+            // Vector 3
+            Vector {
+                input: fmt(vec![
+                    "030000000000000000000000000000000000004141414141414141414141414141",
+                    "020000000000000000000000000000000000004141414141414141414141414141",
+                    "020000000000000000000000000000000000004141414141414141414141414140",
+                    "030000000000000000000000000000000000004141414141414141414141414140",
+                ]),
+                expect: fmt(vec![
+                    "020000000000000000000000000000000000004141414141414141414141414140",
+                    "020000000000000000000000000000000000004141414141414141414141414141",
+                    "030000000000000000000000000000000000004141414141414141414141414140",
+                    "030000000000000000000000000000000000004141414141414141414141414141",
+                ]),
+            },
+            // Vector 4: (from bitcore)
+            Vector {
+                input: fmt(vec![
+                    "022df8750480ad5b26950b25c7ba79d3e37d75f640f8e5d9bcd5b150a0f85014da",
+                    "03e3818b65bcc73a7d64064106a859cc1a5a728c4345ff0b641209fba0d90de6e9",
+                    "021f2f6e1e50cb6a953935c3601284925decd3fd21bc445712576873fb8c6ebc18",
+                ]),
+                expect: fmt(vec![
+                    "021f2f6e1e50cb6a953935c3601284925decd3fd21bc445712576873fb8c6ebc18",
+                    "022df8750480ad5b26950b25c7ba79d3e37d75f640f8e5d9bcd5b150a0f85014da",
+                    "03e3818b65bcc73a7d64064106a859cc1a5a728c4345ff0b641209fba0d90de6e9",
+                ]),
+            },
+            // Non-BIP67 vectors
+            Vector {
+                input: fmt(vec![
+                    "02c690d642c1310f3a1ababad94e3930e4023c930ea472e7f37f660fe485263b88",
+                    "0234dd69c56c36a41230d573d68adeae0030c9bc0bf26f24d3e1b64c604d293c68",
+                    "041a181bd0e79974bd7ca552e09fc42ba9c3d5dbb3753741d6f0ab3015dbfd9a22d6b001a32f5f51ac6f2c0f35e73a6a62f59e848fa854d3d21f3f231594eeaa46",
+                    "032b8324c93575034047a52e9bca05a46d8347046b91a032eff07d5de8d3f2730b",
+                    "04c4b0bbb339aa236bff38dbe6a451e111972a7909a126bc424013cba2ec33bc3816753d96001fd7cba3ce5372f5c9a0d63708183033538d07b1e532fc43aaacfa",
+                    "028e1c947c8c0b8ed021088b8e981491ac7af2b8fabebea1abdb448424c8ed75b7",
+                    "045d753414fa292ea5b8f56e39cfb6a0287b2546231a5cb05c4b14ab4b463d171f5128148985b23eccb1e2905374873b1f09b9487f47afa6b1f2b0083ac8b4f7e8",
+                    "03004a8a3d242d7957c0b60fb7208d386fa6a0193aabd1f3f095ffd0ac097e447b",
+                    "04eb0db2d71ccbb0edd8fb35092cbcae2f7fa1f06d4c170804bf52007924b569a8d2d6f6bc8fd2b3caa3253fa1bb674443743bf7fb9f94f9c0b0831a252894cfa8",
+                    "04516cde23e14f2319423b7a4a7ae48b1dadceb5e9c123198d417d10895684c42eb05e210f90ccbc72448803a22312e3f122ff2939956ccef4f7316f836295ddd5",
+                    "038f47dcd43ba6d97fc9ed2e3bba09b175a45fac55f0683e8cf771e8ced4572354",
+                    "04c6bec3b07586a4b085a78cbb97e9bab6f1d3c9ebf299b65dec85213c5eacd44487de86017183120bb7ea3b6c6660c5037615fe1add2a73f800cbeeae22c60438",
+                    "03e1a1cfa9eaff604ae237b7af31ffe4c01be22eb96f3da0e62c5850dd4b4386c1",
+                    "028d3a2d9f1b1c5c75845944f93bc183ba23aecde53f1978b8aa1b77661be6114f",
+                    "028bde91b10013e08949a318018fedbd896534a549a278e220169ee2a36517c7aa",
+                    "04c4b0bbb339aa236bff38dbe6a451e111972a7909a126bc424013cba2ec33bc38e98ac269ffe028345c31ac8d0a365f29c8f7e7cfccac72f84e1acd02bc554f35",
+                ]),
+                expect: fmt(vec![
+                    "0234dd69c56c36a41230d573d68adeae0030c9bc0bf26f24d3e1b64c604d293c68",
+                    "028bde91b10013e08949a318018fedbd896534a549a278e220169ee2a36517c7aa",
+                    "028d3a2d9f1b1c5c75845944f93bc183ba23aecde53f1978b8aa1b77661be6114f",
+                    "028e1c947c8c0b8ed021088b8e981491ac7af2b8fabebea1abdb448424c8ed75b7",
+                    "02c690d642c1310f3a1ababad94e3930e4023c930ea472e7f37f660fe485263b88",
+                    "03004a8a3d242d7957c0b60fb7208d386fa6a0193aabd1f3f095ffd0ac097e447b",
+                    "032b8324c93575034047a52e9bca05a46d8347046b91a032eff07d5de8d3f2730b",
+                    "038f47dcd43ba6d97fc9ed2e3bba09b175a45fac55f0683e8cf771e8ced4572354",
+                    "03e1a1cfa9eaff604ae237b7af31ffe4c01be22eb96f3da0e62c5850dd4b4386c1",
+                    "041a181bd0e79974bd7ca552e09fc42ba9c3d5dbb3753741d6f0ab3015dbfd9a22d6b001a32f5f51ac6f2c0f35e73a6a62f59e848fa854d3d21f3f231594eeaa46",
+                    "04516cde23e14f2319423b7a4a7ae48b1dadceb5e9c123198d417d10895684c42eb05e210f90ccbc72448803a22312e3f122ff2939956ccef4f7316f836295ddd5",
+                    "045d753414fa292ea5b8f56e39cfb6a0287b2546231a5cb05c4b14ab4b463d171f5128148985b23eccb1e2905374873b1f09b9487f47afa6b1f2b0083ac8b4f7e8",
+                    // These two pubkeys are mirrored. This helps verify the sort past the x value.
+                    "04c4b0bbb339aa236bff38dbe6a451e111972a7909a126bc424013cba2ec33bc3816753d96001fd7cba3ce5372f5c9a0d63708183033538d07b1e532fc43aaacfa",
+                    "04c4b0bbb339aa236bff38dbe6a451e111972a7909a126bc424013cba2ec33bc38e98ac269ffe028345c31ac8d0a365f29c8f7e7cfccac72f84e1acd02bc554f35",
+                    "04c6bec3b07586a4b085a78cbb97e9bab6f1d3c9ebf299b65dec85213c5eacd44487de86017183120bb7ea3b6c6660c5037615fe1add2a73f800cbeeae22c60438",
+                    "04eb0db2d71ccbb0edd8fb35092cbcae2f7fa1f06d4c170804bf52007924b569a8d2d6f6bc8fd2b3caa3253fa1bb674443743bf7fb9f94f9c0b0831a252894cfa8",
+                ]),
+            },
+        ];
+        for mut vector in vectors {
+            vector.input.sort_by_cached_key(|k| PublicKey::to_sort_key(*k));
+            assert_eq!(vector.input, vector.expect);
+        }
+    }
+
+    #[test]
+    #[cfg(feature = "rand-std")]
+    fn public_key_constructors() {
+        use secp256k1::rand;
+
+        let secp = Secp256k1::new();
+        let kp = KeyPair::new(&secp, &mut rand::thread_rng());
+
+        let _ = PublicKey::new(kp);
+        let _ = PublicKey::new_uncompressed(kp);
+    }
+
+    #[test]
+    fn public_key_from_str_wrong_length() {
+        // Sanity checks, we accept string length 130 digits.
+        let s = "042e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af191923a2964c177f5b5923ae500fca49e99492d534aa3759d6b25a8bc971b133";
+        assert_eq!(s.len(), 130);
+        assert!(PublicKey::from_str(s).is_ok());
+        // And 66 digits.
+        let s = "032e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af";
+        assert_eq!(s.len(), 66);
+        assert!(PublicKey::from_str(s).is_ok());
+
+        let s = "aoeusthb";
+        assert_eq!(s.len(), 8);
+        let res = PublicKey::from_str(s);
+        assert!(res.is_err());
+        assert_eq!(res.unwrap_err(), Error::InvalidHexLength(8));
+    }
+}
diff --git a/dash/src/crypto/mod.rs b/dash/src/crypto/mod.rs
new file mode 100644
index 000000000..ad59b66dc
--- /dev/null
+++ b/dash/src/crypto/mod.rs
@@ -0,0 +1,13 @@
+// Rust Bitcoin Library - Written by the rust-dash developers.
+// SPDX-License-Identifier: CC0-1.0
+
+//! Cryptography
+//!
+//! Cryptography related functionality: keys and signatures.
+//!
+
+pub mod ecdsa;
+pub mod key;
+pub mod sighash;
+// Contents re-exported in `dash::taproot`.
+pub(crate) mod taproot;
diff --git a/dash/src/crypto/sighash.rs b/dash/src/crypto/sighash.rs
new file mode 100644
index 000000000..d77a39b5c
--- /dev/null
+++ b/dash/src/crypto/sighash.rs
@@ -0,0 +1,1809 @@
+// SPDX-License-Identifier: CC0-1.0
+
+//! Signature hash implementation (used in transaction signing).
+//!
+//! Efficient implementation of the algorithm to compute the message to be signed according to
+//! [Bip341](https://github.com/bitcoin/bips/blob/150ab6f5c3aca9da05fccc5b435e9667853407f4/bip-0341.mediawiki),
+//! [Bip143](https://github.com/bitcoin/bips/blob/99701f68a88ce33b2d0838eb84e115cef505b4c2/bip-0143.mediawiki)
+//! and legacy (before Bip143).
+//!
+//! Computing signature hashes is required to sign a transaction and this module is designed to
+//! handle its complexity efficiently. Computing these hashes is as simple as creating
+//! [`SighashCache`] and calling its methods.
+
+use core::borrow::{Borrow, BorrowMut};
+use core::{fmt, str};
+
+use hashes::{hash_newtype, sha256, sha256d, sha256t_hash_newtype, Hash};
+
+use crate::blockdata::witness::Witness;
+use crate::consensus::{encode, Encodable};
+use crate::error::impl_std_error;
+use crate::prelude::*;
+use crate::taproot::{LeafVersion, TapLeafHash, TAPROOT_ANNEX_PREFIX};
+use crate::io;
+use crate::blockdata::transaction::{Transaction, EncodeSigningDataResult, txin::TxIn, txout::TxOut};
+use crate::script::{Script, ScriptBuf};
+
+/// Used for signature hash for invalid use of SIGHASH_SINGLE.
+#[rustfmt::skip]
+pub(crate) const UINT256_ONE: [u8; 32] = [
+    1, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0
+];
+
+macro_rules! impl_thirty_two_byte_hash {
+    ($ty:ident) => {
+        impl secp256k1::ThirtyTwoByteHash for $ty {
+            fn into_32(self) -> [u8; 32] { self.to_byte_array() }
+        }
+    };
+}
+
+hash_newtype! {
+    /// Hash of a transaction according to the legacy signature algorithm.
+    #[hash_newtype(forward)]
+    pub struct LegacySighash(sha256d::Hash);
+
+    /// Hash of a transaction according to the segwit version 0 signature algorithm.
+    #[hash_newtype(forward)]
+    pub struct SegwitV0Sighash(sha256d::Hash);
+}
+
+impl_thirty_two_byte_hash!(LegacySighash);
+impl_thirty_two_byte_hash!(SegwitV0Sighash);
+
+sha256t_hash_newtype! {
+    pub struct TapSighashTag = hash_str("TapSighash");
+
+    /// Taproot-tagged hash with tag \"TapSighash\".
+    ///
+    /// This hash type is used for computing taproot signature hash."
+    #[hash_newtype(forward)]
+    pub struct TapSighash(_);
+}
+
+impl_thirty_two_byte_hash!(TapSighash);
+
+/// Efficiently calculates signature hash message for legacy, segwit and taproot inputs.
+#[derive(Debug)]
+pub struct SighashCache<T: Borrow<Transaction>> {
+    /// Access to transaction required for transaction introspection. Moreover, type
+    /// `T: Borrow<Transaction>` allows us to use borrowed and mutable borrowed types,
+    /// the latter in particular is necessary for [`SighashCache::witness_mut`].
+    tx: T,
+
+    /// Common cache for taproot and segwit inputs, `None` for legacy inputs.
+    common_cache: Option<CommonCache>,
+
+    /// Cache for segwit v0 inputs (the result of another round of sha256 on `common_cache`).
+    segwit_cache: Option<SegwitCache>,
+
+    /// Cache for taproot v1 inputs.
+    taproot_cache: Option<TaprootCache>,
+}
+
+/// Common values cached between segwit and taproot inputs.
+#[derive(Debug)]
+struct CommonCache {
+    prevouts: sha256::Hash,
+    sequences: sha256::Hash,
+
+    /// In theory `outputs` could be an `Option` since `SIGHASH_NONE` and `SIGHASH_SINGLE` do not
+    /// need it, but since `SIGHASH_ALL` is by far the most used variant we don't bother.
+    outputs: sha256::Hash,
+}
+
+/// Values cached for segwit inputs, equivalent to [`CommonCache`] plus another round of `sha256`.
+#[derive(Debug)]
+struct SegwitCache {
+    prevouts: sha256d::Hash,
+    sequences: sha256d::Hash,
+    outputs: sha256d::Hash,
+}
+
+/// Values cached for taproot inputs.
+#[derive(Debug)]
+struct TaprootCache {
+    amounts: sha256::Hash,
+    script_pubkeys: sha256::Hash,
+}
+
+/// Contains outputs of previous transactions. In the case [`TapSighashType`] variant is
+/// `SIGHASH_ANYONECANPAY`, [`Prevouts::One`] may be used.
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+pub enum Prevouts<'u, T>
+    where
+        T: 'u + Borrow<TxOut>,
+{
+    /// `One` variant allows provision of the single prevout needed. It's useful, for example, when
+    /// modifier `SIGHASH_ANYONECANPAY` is provided, only prevout of the current input is needed.
+    /// The first `usize` argument is the input index this [`TxOut`] is referring to.
+    One(usize, T),
+    /// When `SIGHASH_ANYONECANPAY` is not provided, or when the caller is giving all prevouts so
+    /// the same variable can be used for multiple inputs.
+    All(&'u [T]),
+}
+
+const KEY_VERSION_0: u8 = 0u8;
+
+/// Information related to the script path spending.
+///
+/// This can be hashed into a [`TapLeafHash`].
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+pub struct ScriptPath<'s> {
+    script: &'s Script,
+    leaf_version: LeafVersion,
+}
+
+/// Hashtype of an input's signature, encoded in the last byte of the signature.
+/// Fixed values so they can be cast as integer types for encoding.
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+pub enum TapSighashType {
+    /// 0x0: Used when not explicitly specified, defaults to [`TapSighashType::All`]
+    Default = 0x00,
+    /// 0x1: Sign all outputs.
+    All = 0x01,
+    /// 0x2: Sign no outputs --- anyone can choose the destination.
+    None = 0x02,
+    /// 0x3: Sign the output whose index matches this input's index. If none exists,
+    /// sign the hash `0000000000000000000000000000000000000000000000000000000000000001`.
+    /// (This rule is probably an unintentional C++ism, but it's consensus so we have
+    /// to follow it.)
+    Single = 0x03,
+    /// 0x81: Sign all outputs but only this input.
+    AllPlusAnyoneCanPay = 0x81,
+    /// 0x82: Sign no outputs and only this input.
+    NonePlusAnyoneCanPay = 0x82,
+    /// 0x83: Sign one output and only this input (see `Single` for what "one output" means).
+    SinglePlusAnyoneCanPay = 0x83,
+}
+#[cfg(feature = "serde")]
+crate::serde_utils::serde_string_impl!(TapSighashType, "a TapSighashType data");
+
+impl fmt::Display for TapSighashType {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        use TapSighashType::*;
+
+        let s = match self {
+            Default => "SIGHASH_DEFAULT",
+            All => "SIGHASH_ALL",
+            None => "SIGHASH_NONE",
+            Single => "SIGHASH_SINGLE",
+            AllPlusAnyoneCanPay => "SIGHASH_ALL|SIGHASH_ANYONECANPAY",
+            NonePlusAnyoneCanPay => "SIGHASH_NONE|SIGHASH_ANYONECANPAY",
+            SinglePlusAnyoneCanPay => "SIGHASH_SINGLE|SIGHASH_ANYONECANPAY",
+        };
+        f.write_str(s)
+    }
+}
+
+impl str::FromStr for TapSighashType {
+    type Err = SighashTypeParseError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        use TapSighashType::*;
+
+        match s {
+            "SIGHASH_DEFAULT" => Ok(Default),
+            "SIGHASH_ALL" => Ok(All),
+            "SIGHASH_NONE" => Ok(None),
+            "SIGHASH_SINGLE" => Ok(Single),
+            "SIGHASH_ALL|SIGHASH_ANYONECANPAY" => Ok(AllPlusAnyoneCanPay),
+            "SIGHASH_NONE|SIGHASH_ANYONECANPAY" => Ok(NonePlusAnyoneCanPay),
+            "SIGHASH_SINGLE|SIGHASH_ANYONECANPAY" => Ok(SinglePlusAnyoneCanPay),
+            _ => Err(SighashTypeParseError { unrecognized: s.to_owned() }),
+        }
+    }
+}
+
+/// Possible errors in computing the signature message.
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+#[non_exhaustive]
+pub enum Error {
+    /// Could happen only by using `*_encode_signing_*` methods with custom writers, engines writers
+    /// like the ones used in methods `*_signature_hash` do not error.
+    Io(io::ErrorKind),
+
+    /// Requested index is greater or equal than the number of inputs in the transaction.
+    IndexOutOfInputsBounds {
+        /// Requested index.
+        index: usize,
+        /// Number of transaction inputs.
+        inputs_size: usize,
+    },
+
+    /// Using `SIGHASH_SINGLE` without a "corresponding output" (an output with the same index as
+    /// the input being verified) is a validation failure.
+    SingleWithoutCorrespondingOutput {
+        /// Requested index.
+        index: usize,
+        /// Number of transaction outputs.
+        outputs_size: usize,
+    },
+
+    /// There are mismatches in the number of prevouts provided compared to the number of inputs in
+    /// the transaction.
+    PrevoutsSize,
+
+    /// Requested a prevout index which is greater than the number of prevouts provided or a
+    /// [`Prevouts::One`] with different index.
+    PrevoutIndex,
+
+    /// A single prevout has been provided but all prevouts are needed unless using
+    /// `SIGHASH_ANYONECANPAY`.
+    PrevoutKind,
+
+    /// Annex must be at least one byte long and the first bytes must be `0x50`.
+    WrongAnnex,
+
+    /// Invalid Sighash type.
+    InvalidSighashType(u32),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        use Error::*;
+
+        match self {
+            Io(error_kind) => write!(f, "writer errored: {:?}", error_kind),
+            IndexOutOfInputsBounds { index, inputs_size } => write!(f, "Requested index ({}) is greater or equal than the number of transaction inputs ({})", index, inputs_size),
+            SingleWithoutCorrespondingOutput { index, outputs_size } => write!(f, "SIGHASH_SINGLE for input ({}) haven't a corresponding output (#outputs:{})", index, outputs_size),
+            PrevoutsSize => write!(f, "Number of supplied prevouts differs from the number of inputs in transaction"),
+            PrevoutIndex => write!(f, "The index requested is greater than available prevouts or different from the provided [Provided::Anyone] index"),
+            PrevoutKind => write!(f, "A single prevout has been provided but all prevouts are needed without `ANYONECANPAY`"),
+            WrongAnnex => write!(f, "Annex must be at least one byte long and the first bytes must be `0x50`"),
+            InvalidSighashType(hash_ty) => write!(f, "Invalid taproot signature hash type : {} ", hash_ty),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use Error::*;
+
+        match self {
+            Io(_)
+            | IndexOutOfInputsBounds { .. }
+            | SingleWithoutCorrespondingOutput { .. }
+            | PrevoutsSize
+            | PrevoutIndex
+            | PrevoutKind
+            | WrongAnnex
+            | InvalidSighashType(_) => None,
+        }
+    }
+}
+
+impl<'u, T> Prevouts<'u, T>
+    where
+        T: Borrow<TxOut>,
+{
+    fn check_all(&self, tx: &Transaction) -> Result<(), Error> {
+        if let Prevouts::All(prevouts) = self {
+            if prevouts.len() != tx.input.len() {
+                return Err(Error::PrevoutsSize);
+            }
+        }
+        Ok(())
+    }
+
+    fn get_all(&self) -> Result<&[T], Error> {
+        match self {
+            Prevouts::All(prevouts) => Ok(*prevouts),
+            _ => Err(Error::PrevoutKind),
+        }
+    }
+
+    fn get(&self, input_index: usize) -> Result<&TxOut, Error> {
+        match self {
+            Prevouts::One(index, prevout) =>
+                if input_index == *index {
+                    Ok(prevout.borrow())
+                } else {
+                    Err(Error::PrevoutIndex)
+                },
+            Prevouts::All(prevouts) =>
+                prevouts.get(input_index).map(|x| x.borrow()).ok_or(Error::PrevoutIndex),
+        }
+    }
+}
+
+impl<'s> ScriptPath<'s> {
+    /// Creates a new `ScriptPath` structure.
+    pub fn new(script: &'s Script, leaf_version: LeafVersion) -> Self {
+        ScriptPath { script, leaf_version }
+    }
+    /// Creates a new `ScriptPath` structure using default leaf version value.
+    pub fn with_defaults(script: &'s Script) -> Self { Self::new(script, LeafVersion::TapScript) }
+    /// Computes the leaf hash for this `ScriptPath`.
+    pub fn leaf_hash(&self) -> TapLeafHash {
+        let mut enc = TapLeafHash::engine();
+
+        self.leaf_version
+            .to_consensus()
+            .consensus_encode(&mut enc)
+            .expect("Writing to hash enging should never fail");
+        self.script.consensus_encode(&mut enc).expect("Writing to hash enging should never fail");
+
+        TapLeafHash::from_engine(enc)
+    }
+}
+
+impl<'s> From<ScriptPath<'s>> for TapLeafHash {
+    fn from(script_path: ScriptPath<'s>) -> TapLeafHash { script_path.leaf_hash() }
+}
+
+/// Hashtype of an input's signature, encoded in the last byte of the signature.
+///
+/// Fixed values so they can be cast as integer types for encoding (see also
+/// [`TapSighashType`]).
+#[derive(PartialEq, Eq, Debug, Copy, Clone, Hash)]
+pub enum EcdsaSighashType {
+    /// 0x1: Sign all outputs.
+    All = 0x01,
+    /// 0x2: Sign no outputs --- anyone can choose the destination.
+    None = 0x02,
+    /// 0x3: Sign the output whose index matches this input's index. If none exists,
+    /// sign the hash `0000000000000000000000000000000000000000000000000000000000000001`.
+    /// (This rule is probably an unintentional C++ism, but it's consensus so we have
+    /// to follow it.)
+    Single = 0x03,
+    /// 0x81: Sign all outputs but only this input.
+    AllPlusAnyoneCanPay = 0x81,
+    /// 0x82: Sign no outputs and only this input.
+    NonePlusAnyoneCanPay = 0x82,
+    /// 0x83: Sign one output and only this input (see `Single` for what "one output" means).
+    SinglePlusAnyoneCanPay = 0x83,
+}
+#[cfg(feature = "serde")]
+crate::serde_utils::serde_string_impl!(EcdsaSighashType, "a EcdsaSighashType data");
+
+impl fmt::Display for EcdsaSighashType {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        use EcdsaSighashType::*;
+
+        let s = match self {
+            All => "SIGHASH_ALL",
+            None => "SIGHASH_NONE",
+            Single => "SIGHASH_SINGLE",
+            AllPlusAnyoneCanPay => "SIGHASH_ALL|SIGHASH_ANYONECANPAY",
+            NonePlusAnyoneCanPay => "SIGHASH_NONE|SIGHASH_ANYONECANPAY",
+            SinglePlusAnyoneCanPay => "SIGHASH_SINGLE|SIGHASH_ANYONECANPAY",
+        };
+        f.write_str(s)
+    }
+}
+
+impl str::FromStr for EcdsaSighashType {
+    type Err = SighashTypeParseError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        use EcdsaSighashType::*;
+
+        match s {
+            "SIGHASH_ALL" => Ok(All),
+            "SIGHASH_NONE" => Ok(None),
+            "SIGHASH_SINGLE" => Ok(Single),
+            "SIGHASH_ALL|SIGHASH_ANYONECANPAY" => Ok(AllPlusAnyoneCanPay),
+            "SIGHASH_NONE|SIGHASH_ANYONECANPAY" => Ok(NonePlusAnyoneCanPay),
+            "SIGHASH_SINGLE|SIGHASH_ANYONECANPAY" => Ok(SinglePlusAnyoneCanPay),
+            _ => Err(SighashTypeParseError { unrecognized: s.to_owned() }),
+        }
+    }
+}
+
+impl EcdsaSighashType {
+    /// Splits the sighash flag into the "real" sighash flag and the ANYONECANPAY boolean.
+    pub(crate) fn split_anyonecanpay_flag(self) -> (EcdsaSighashType, bool) {
+        use EcdsaSighashType::*;
+
+        match self {
+            All => (All, false),
+            None => (None, false),
+            Single => (Single, false),
+            AllPlusAnyoneCanPay => (All, true),
+            NonePlusAnyoneCanPay => (None, true),
+            SinglePlusAnyoneCanPay => (Single, true),
+        }
+    }
+
+    /// Creates a [`EcdsaSighashType`] from a raw `u32`.
+    ///
+    /// **Note**: this replicates consensus behaviour, for current standardness rules correctness
+    /// you probably want [`Self::from_standard`].
+    ///
+    /// This might cause unexpected behavior because it does not roundtrip. That is,
+    /// `EcdsaSighashType::from_consensus(n) as u32 != n` for non-standard values of `n`. While
+    /// verifying signatures, the user should retain the `n` and use it compute the signature hash
+    /// message.
+    pub fn from_consensus(n: u32) -> EcdsaSighashType {
+        use EcdsaSighashType::*;
+
+        // In Bitcoin Core, the SignatureHash function will mask the (int32) value with
+        // 0x1f to (apparently) deactivate ACP when checking for SINGLE and NONE bits.
+        // We however want to be matching also against on ACP-masked ALL, SINGLE, and NONE.
+        // So here we re-activate ACP.
+        let mask = 0x1f | 0x80;
+        match n & mask {
+            // "real" sighashes
+            0x01 => All,
+            0x02 => None,
+            0x03 => Single,
+            0x81 => AllPlusAnyoneCanPay,
+            0x82 => NonePlusAnyoneCanPay,
+            0x83 => SinglePlusAnyoneCanPay,
+            // catchalls
+            x if x & 0x80 == 0x80 => AllPlusAnyoneCanPay,
+            _ => All,
+        }
+    }
+
+    /// Creates a [`EcdsaSighashType`] from a raw `u32`.
+    ///
+    /// # Errors
+    ///
+    /// If `n` is a non-standard sighash value.
+    pub fn from_standard(n: u32) -> Result<EcdsaSighashType, NonStandardSighashType> {
+        use EcdsaSighashType::*;
+
+        match n {
+            // Standard sighashes, see https://github.com/bitcoin/bitcoin/blob/b805dbb0b9c90dadef0424e5b3bf86ac308e103e/src/script/interpreter.cpp#L189-L198
+            0x01 => Ok(All),
+            0x02 => Ok(None),
+            0x03 => Ok(Single),
+            0x81 => Ok(AllPlusAnyoneCanPay),
+            0x82 => Ok(NonePlusAnyoneCanPay),
+            0x83 => Ok(SinglePlusAnyoneCanPay),
+            non_standard => Err(NonStandardSighashType(non_standard)),
+        }
+    }
+
+    /// Converts [`EcdsaSighashType`] to a `u32` sighash flag.
+    ///
+    /// The returned value is guaranteed to be a valid according to standardness rules.
+    pub fn to_u32(self) -> u32 { self as u32 }
+}
+
+impl From<EcdsaSighashType> for TapSighashType {
+    fn from(s: EcdsaSighashType) -> Self {
+        use TapSighashType::*;
+
+        match s {
+            EcdsaSighashType::All => All,
+            EcdsaSighashType::None => None,
+            EcdsaSighashType::Single => Single,
+            EcdsaSighashType::AllPlusAnyoneCanPay => AllPlusAnyoneCanPay,
+            EcdsaSighashType::NonePlusAnyoneCanPay => NonePlusAnyoneCanPay,
+            EcdsaSighashType::SinglePlusAnyoneCanPay => SinglePlusAnyoneCanPay,
+        }
+    }
+}
+
+impl TapSighashType {
+    /// Breaks the sighash flag into the "real" sighash flag and the `SIGHASH_ANYONECANPAY` boolean.
+    pub(crate) fn split_anyonecanpay_flag(self) -> (TapSighashType, bool) {
+        use TapSighashType::*;
+
+        match self {
+            Default => (Default, false),
+            All => (All, false),
+            None => (None, false),
+            Single => (Single, false),
+            AllPlusAnyoneCanPay => (All, true),
+            NonePlusAnyoneCanPay => (None, true),
+            SinglePlusAnyoneCanPay => (Single, true),
+        }
+    }
+
+    /// Constructs a [`TapSighashType`] from a raw `u8`.
+    pub fn from_consensus_u8(hash_ty: u8) -> Result<Self, Error> {
+        use TapSighashType::*;
+
+        Ok(match hash_ty {
+            0x00 => Default,
+            0x01 => All,
+            0x02 => None,
+            0x03 => Single,
+            0x81 => AllPlusAnyoneCanPay,
+            0x82 => NonePlusAnyoneCanPay,
+            0x83 => SinglePlusAnyoneCanPay,
+            x => return Err(Error::InvalidSighashType(x as u32)),
+        })
+    }
+}
+
+/// This type is consensus valid but an input including it would prevent the transaction from
+/// being relayed on today's Bitcoin network.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct NonStandardSighashType(pub u32);
+
+impl fmt::Display for NonStandardSighashType {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Non standard sighash type {}", self.0)
+    }
+}
+
+impl_std_error!(NonStandardSighashType);
+
+/// Error returned for failure during parsing one of the sighash types.
+///
+/// This is currently returned for unrecognized sighash strings.
+#[derive(Debug, Clone)]
+pub struct SighashTypeParseError {
+    /// The unrecognized string we attempted to parse.
+    pub unrecognized: String,
+}
+
+impl fmt::Display for SighashTypeParseError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Unrecognized SIGHASH string '{}'", self.unrecognized)
+    }
+}
+
+impl_std_error!(SighashTypeParseError);
+
+impl<R: Borrow<Transaction>> SighashCache<R> {
+    /// Constructs a new `SighashCache` from an unsigned transaction.
+    ///
+    /// The sighash components are computed in a lazy manner when required. For the generated
+    /// sighashes to be valid, no fields in the transaction may change except for script_sig and
+    /// witness.
+    pub fn new(tx: R) -> Self {
+        SighashCache { tx, common_cache: None, taproot_cache: None, segwit_cache: None }
+    }
+
+    /// Returns the reference to the cached transaction.
+    pub fn transaction(&self) -> &Transaction { self.tx.borrow() }
+
+    /// Destroys the cache and recovers the stored transaction.
+    pub fn into_transaction(self) -> R { self.tx }
+
+    /// Encodes the BIP341 signing data for any flag type into a given object implementing a
+    /// [`io::Write`] trait.
+    pub fn taproot_encode_signing_data_to<Write: io::Write, T: Borrow<TxOut>>(
+        &mut self,
+        mut writer: Write,
+        input_index: usize,
+        prevouts: &Prevouts<T>,
+        annex: Option<Annex>,
+        leaf_hash_code_separator: Option<(TapLeafHash, u32)>,
+        sighash_type: TapSighashType,
+    ) -> Result<(), Error> {
+        prevouts.check_all(self.tx.borrow())?;
+
+        let (sighash, anyone_can_pay) = sighash_type.split_anyonecanpay_flag();
+
+        // epoch
+        0u8.consensus_encode(&mut writer)?;
+
+        // * Control:
+        // hash_type (1).
+        (sighash_type as u8).consensus_encode(&mut writer)?;
+
+        // * Transaction Data:
+        // nVersion (2): the nVersion of the transaction.
+        self.tx.borrow().version.consensus_encode(&mut writer)?;
+
+        // nTransactionType (2): the nTxType of the transaction.
+        (self.tx.borrow().tx_type() as u16).consensus_encode(&mut writer)?;
+
+        // nLockTime (4): the nLockTime of the transaction.
+        self.tx.borrow().lock_time.consensus_encode(&mut writer)?;
+
+        // SpecialTransactionPayload
+        if let Some(payload) = &self.tx.borrow().special_transaction_payload {
+            payload.consensus_encode(&mut writer)?;
+        }
+
+        // If the hash_type & 0x80 does not equal SIGHASH_ANYONECANPAY:
+        //     sha_prevouts (32): the SHA256 of the serialization of all input outpoints.
+        //     sha_amounts (32): the SHA256 of the serialization of all spent output amounts.
+        //     sha_scriptpubkeys (32): the SHA256 of the serialization of all spent output scriptPubKeys.
+        //     sha_sequences (32): the SHA256 of the serialization of all input nSequence.
+        if !anyone_can_pay {
+            self.common_cache().prevouts.consensus_encode(&mut writer)?;
+            self.taproot_cache(prevouts.get_all()?).amounts.consensus_encode(&mut writer)?;
+            self.taproot_cache(prevouts.get_all()?).script_pubkeys.consensus_encode(&mut writer)?;
+            self.common_cache().sequences.consensus_encode(&mut writer)?;
+        }
+
+        // If hash_type & 3 does not equal SIGHASH_NONE or SIGHASH_SINGLE:
+        //     sha_outputs (32): the SHA256 of the serialization of all outputs in CTxOut format.
+        if sighash != TapSighashType::None && sighash != TapSighashType::Single {
+            self.common_cache().outputs.consensus_encode(&mut writer)?;
+        }
+
+        // * Data about this input:
+        // spend_type (1): equal to (ext_flag * 2) + annex_present, where annex_present is 0
+        // if no annex is present, or 1 otherwise
+        let mut spend_type = 0u8;
+        if annex.is_some() {
+            spend_type |= 1u8;
+        }
+        if leaf_hash_code_separator.is_some() {
+            spend_type |= 2u8;
+        }
+        spend_type.consensus_encode(&mut writer)?;
+
+        // If hash_type & 0x80 equals SIGHASH_ANYONECANPAY:
+        //      outpoint (36): the COutPoint of this input (32-byte hash + 4-byte little-endian).
+        //      amount (8): value of the previous output spent by this input.
+        //      scriptPubKey (35): scriptPubKey of the previous output spent by this input, serialized as script inside CTxOut. Its size is always 35 bytes.
+        //      nSequence (4): nSequence of this input.
+        if anyone_can_pay {
+            let txin =
+                &self.tx.borrow().input.get(input_index)
+                    .ok_or_else(|| Error::IndexOutOfInputsBounds {
+                        index: input_index,
+                        inputs_size: self.tx.borrow().input.len(),
+                    })?;
+            let previous_output = prevouts.get(input_index)?;
+            txin.previous_output.consensus_encode(&mut writer)?;
+            previous_output.value.consensus_encode(&mut writer)?;
+            previous_output.script_pubkey.consensus_encode(&mut writer)?;
+            txin.sequence.consensus_encode(&mut writer)?;
+        } else {
+            (input_index as u32).consensus_encode(&mut writer)?;
+        }
+
+        // If an annex is present (the lowest bit of spend_type is set):
+        //      sha_annex (32): the SHA256 of (compact_size(size of annex) || annex), where annex
+        //      includes the mandatory 0x50 prefix.
+        if let Some(annex) = annex {
+            let mut enc = sha256::Hash::engine();
+            annex.consensus_encode(&mut enc)?;
+            let hash = sha256::Hash::from_engine(enc);
+            hash.consensus_encode(&mut writer)?;
+        }
+
+        // * Data about this output:
+        // If hash_type & 3 equals SIGHASH_SINGLE:
+        //      sha_single_output (32): the SHA256 of the corresponding output in CTxOut format.
+        if sighash == TapSighashType::Single {
+            let mut enc = sha256::Hash::engine();
+            self.tx.borrow().output.get(input_index)
+                .ok_or_else(|| Error::SingleWithoutCorrespondingOutput {
+                    index: input_index,
+                    outputs_size: self.tx.borrow().output.len(),
+                })?
+                .consensus_encode(&mut enc)?;
+            let hash = sha256::Hash::from_engine(enc);
+            hash.consensus_encode(&mut writer)?;
+        }
+
+        //     if (scriptpath):
+        //         ss += TaggedHash("TapLeaf", bytes([leaf_ver]) + ser_string(script))
+        //         ss += bytes([0])
+        //         ss += struct.pack("<i", codeseparator_pos)
+        if let Some((hash, code_separator_pos)) = leaf_hash_code_separator {
+            hash.as_byte_array().consensus_encode(&mut writer)?;
+            KEY_VERSION_0.consensus_encode(&mut writer)?;
+            code_separator_pos.consensus_encode(&mut writer)?;
+        }
+
+        Ok(())
+    }
+
+    /// Computes the BIP341 sighash for any flag type.
+    pub fn taproot_signature_hash<T: Borrow<TxOut>>(
+        &mut self,
+        input_index: usize,
+        prevouts: &Prevouts<T>,
+        annex: Option<Annex>,
+        leaf_hash_code_separator: Option<(TapLeafHash, u32)>,
+        sighash_type: TapSighashType,
+    ) -> Result<TapSighash, Error> {
+        let mut enc = TapSighash::engine();
+        self.taproot_encode_signing_data_to(
+            &mut enc,
+            input_index,
+            prevouts,
+            annex,
+            leaf_hash_code_separator,
+            sighash_type,
+        )?;
+        Ok(TapSighash::from_engine(enc))
+    }
+
+    /// Computes the BIP341 sighash for a key spend.
+    pub fn taproot_key_spend_signature_hash<T: Borrow<TxOut>>(
+        &mut self,
+        input_index: usize,
+        prevouts: &Prevouts<T>,
+        sighash_type: TapSighashType,
+    ) -> Result<TapSighash, Error> {
+        let mut enc = TapSighash::engine();
+        self.taproot_encode_signing_data_to(
+            &mut enc,
+            input_index,
+            prevouts,
+            None,
+            None,
+            sighash_type,
+        )?;
+        Ok(TapSighash::from_engine(enc))
+    }
+
+    /// Computes the BIP341 sighash for a script spend.
+    ///
+    /// Assumes the default `OP_CODESEPARATOR` position of `0xFFFFFFFF`. Custom values can be
+    /// provided through the more fine-grained API of [`SighashCache::taproot_encode_signing_data_to`].
+    pub fn taproot_script_spend_signature_hash<S: Into<TapLeafHash>, T: Borrow<TxOut>>(
+        &mut self,
+        input_index: usize,
+        prevouts: &Prevouts<T>,
+        leaf_hash: S,
+        sighash_type: TapSighashType,
+    ) -> Result<TapSighash, Error> {
+        let mut enc = TapSighash::engine();
+        self.taproot_encode_signing_data_to(
+            &mut enc,
+            input_index,
+            prevouts,
+            None,
+            Some((leaf_hash.into(), 0xFFFFFFFF)),
+            sighash_type,
+        )?;
+        Ok(TapSighash::from_engine(enc))
+    }
+
+    /// Encodes the BIP143 signing data for any flag type into a given object implementing a
+    /// [`std::io::Write`] trait.
+    pub fn segwit_encode_signing_data_to<Write: io::Write>(
+        &mut self,
+        mut writer: Write,
+        input_index: usize,
+        script_code: &Script,
+        value: u64,
+        sighash_type: EcdsaSighashType,
+    ) -> Result<(), Error> {
+        let zero_hash = sha256d::Hash::all_zeros();
+
+        let (sighash, anyone_can_pay) = sighash_type.split_anyonecanpay_flag();
+
+        self.tx.borrow().version.consensus_encode(&mut writer)?;
+
+        if !anyone_can_pay {
+            self.segwit_cache().prevouts.consensus_encode(&mut writer)?;
+        } else {
+            zero_hash.consensus_encode(&mut writer)?;
+        }
+
+        if !anyone_can_pay
+            && sighash != EcdsaSighashType::Single
+            && sighash != EcdsaSighashType::None
+        {
+            self.segwit_cache().sequences.consensus_encode(&mut writer)?;
+        } else {
+            zero_hash.consensus_encode(&mut writer)?;
+        }
+
+        {
+            let txin =
+                &self.tx.borrow().input.get(input_index).ok_or(Error::IndexOutOfInputsBounds {
+                    index: input_index,
+                    inputs_size: self.tx.borrow().input.len(),
+                })?;
+
+            txin.previous_output.consensus_encode(&mut writer)?;
+            script_code.consensus_encode(&mut writer)?;
+            value.consensus_encode(&mut writer)?;
+            txin.sequence.consensus_encode(&mut writer)?;
+        }
+
+        if sighash != EcdsaSighashType::Single && sighash != EcdsaSighashType::None {
+            self.segwit_cache().outputs.consensus_encode(&mut writer)?;
+        } else if sighash == EcdsaSighashType::Single && input_index < self.tx.borrow().output.len()
+        {
+            let mut single_enc = LegacySighash::engine();
+            self.tx.borrow().output[input_index].consensus_encode(&mut single_enc)?;
+            let hash = LegacySighash::from_engine(single_enc);
+            writer.write_all(&hash[..])?;
+        } else {
+            writer.write_all(&zero_hash[..])?;
+        }
+
+        self.tx.borrow().lock_time.consensus_encode(&mut writer)?;
+        sighash_type.to_u32().consensus_encode(&mut writer)?;
+        Ok(())
+    }
+
+    /// Computes the BIP143 sighash for any flag type.
+    pub fn segwit_signature_hash(
+        &mut self,
+        input_index: usize,
+        script_code: &Script,
+        value: u64,
+        sighash_type: EcdsaSighashType,
+    ) -> Result<SegwitV0Sighash, Error> {
+        let mut enc = SegwitV0Sighash::engine();
+        self.segwit_encode_signing_data_to(
+            &mut enc,
+            input_index,
+            script_code,
+            value,
+            sighash_type,
+        )?;
+        Ok(SegwitV0Sighash::from_engine(enc))
+    }
+
+    /// Encodes the legacy signing data from which a signature hash for a given input index with a
+    /// given sighash flag can be computed.
+    ///
+    /// To actually produce a scriptSig, this hash needs to be run through an ECDSA signer, the
+    /// [`EcdsaSighashType`] appended to the resulting sig, and a script written around this, but
+    /// this is the general (and hard) part.
+    ///
+    /// The `sighash_type` supports an arbitrary `u32` value, instead of just [`EcdsaSighashType`],
+    /// because internally 4 bytes are being hashed, even though only the lowest byte is appended to
+    /// signature in a transaction.
+    ///
+    /// # Warning
+    ///
+    /// - Does NOT attempt to support OP_CODESEPARATOR. In general this would require evaluating
+    /// `script_pubkey` to determine which separators get evaluated and which don't, which we don't
+    /// have the information to determine.
+    /// - Does NOT handle the sighash single bug (see "Return type" section)
+    ///
+    /// # Returns
+    ///
+    /// This function can't handle the SIGHASH_SINGLE bug internally, so it returns [`EncodeSigningDataResult`]
+    /// that must be handled by the caller (see [`EncodeSigningDataResult::is_sighash_single_bug`]).
+    pub fn legacy_encode_signing_data_to<Write: io::Write, U: Into<u32>>(
+        &self,
+        writer: Write,
+        input_index: usize,
+        script_pubkey: &Script,
+        sighash_type: U,
+    ) -> EncodeSigningDataResult<Error> {
+        if input_index >= self.tx.borrow().input.len() {
+            return EncodeSigningDataResult::WriteResult(Err(Error::IndexOutOfInputsBounds {
+                index: input_index,
+                inputs_size: self.tx.borrow().input.len(),
+            }));
+        }
+        let sighash_type: u32 = sighash_type.into();
+
+        if is_invalid_use_of_sighash_single(
+            sighash_type,
+            input_index,
+            self.tx.borrow().output.len(),
+        ) {
+            // We cannot correctly handle the SIGHASH_SINGLE bug here because usage of this function
+            // will result in the data written to the writer being hashed, however the correct
+            // handling of the SIGHASH_SINGLE bug is to return the 'one array' - either implement
+            // this behaviour manually or use `signature_hash()`.
+            return EncodeSigningDataResult::SighashSingleBug;
+        }
+
+        fn encode_signing_data_to_inner<Write: io::Write>(
+            self_: &Transaction,
+            mut writer: Write,
+            input_index: usize,
+            script_pubkey: &Script,
+            sighash_type: u32,
+        ) -> Result<(), io::Error> {
+            let (sighash, anyone_can_pay) =
+                EcdsaSighashType::from_consensus(sighash_type).split_anyonecanpay_flag();
+
+            // Build tx to sign
+            let mut tx = Transaction {
+                version: self_.version,
+                lock_time: self_.lock_time,
+                input: vec![],
+                output: vec![],
+                special_transaction_payload: None,
+            };
+            // Add all inputs necessary..
+            if anyone_can_pay {
+                tx.input = vec![TxIn {
+                    previous_output: self_.input[input_index].previous_output,
+                    script_sig: script_pubkey.to_owned(),
+                    sequence: self_.input[input_index].sequence,
+                    witness: Witness::default(),
+                }];
+            } else {
+                tx.input = Vec::with_capacity(self_.input.len());
+                for (n, input) in self_.input.iter().enumerate() {
+                    tx.input.push(TxIn {
+                        previous_output: input.previous_output,
+                        script_sig: if n == input_index {
+                            script_pubkey.to_owned()
+                        } else {
+                            ScriptBuf::new()
+                        },
+                        sequence: if n != input_index
+                            && (sighash == EcdsaSighashType::Single
+                            || sighash == EcdsaSighashType::None)
+                        {
+                            0
+                        } else {
+                            input.sequence
+                        },
+                        witness: Witness::default(),
+                    });
+                }
+            }
+            // ..then all outputs
+            tx.output = match sighash {
+                EcdsaSighashType::All => self_.output.clone(),
+                EcdsaSighashType::Single => {
+                    let output_iter = self_
+                        .output
+                        .iter()
+                        .take(input_index + 1) // sign all outputs up to and including this one, but erase
+                        .enumerate() // all of them except for this one
+                        .map(
+                            |(n, out)| {
+                                if n == input_index {
+                                    out.clone()
+                                } else {
+                                    TxOut::default()
+                                }
+                            },
+                        );
+                    output_iter.collect()
+                }
+                EcdsaSighashType::None => vec![],
+                _ => unreachable!(),
+            };
+            // hash the result
+            tx.consensus_encode(&mut writer)?;
+            sighash_type.to_le_bytes().consensus_encode(&mut writer)?;
+            Ok(())
+        }
+
+        EncodeSigningDataResult::WriteResult(
+            encode_signing_data_to_inner(
+                self.tx.borrow(),
+                writer,
+                input_index,
+                script_pubkey,
+                sighash_type,
+            )
+                .map_err(|e| Error::Io(e.kind())),
+        )
+    }
+
+    /// Computes a legacy signature hash for a given input index with a given sighash flag.
+    ///
+    /// To actually produce a scriptSig, this hash needs to be run through an ECDSA signer, the
+    /// [`EcdsaSighashType`] appended to the resulting sig, and a script written around this, but
+    /// this is the general (and hard) part.
+    ///
+    /// The `sighash_type` supports an arbitrary `u32` value, instead of just [`EcdsaSighashType`],
+    /// because internally 4 bytes are being hashed, even though only the lowest byte is appended to
+    /// signature in a transaction.
+    ///
+    /// This function correctly handles the sighash single bug by returning the 'one array'. The
+    /// sighash single bug becomes exploitable when one tries to sign a transaction with
+    /// `SIGHASH_SINGLE` and there is not a corresponding output with the same index as the input.
+    ///
+    /// # Warning
+    ///
+    /// Does NOT attempt to support OP_CODESEPARATOR. In general this would require evaluating
+    /// `script_pubkey` to determine which separators get evaluated and which don't, which we don't
+    /// have the information to determine.
+    pub fn legacy_signature_hash(
+        &self,
+        input_index: usize,
+        script_pubkey: &Script,
+        sighash_type: u32,
+    ) -> Result<LegacySighash, Error> {
+        let mut enc = LegacySighash::engine();
+        if self
+            .legacy_encode_signing_data_to(&mut enc, input_index, script_pubkey, sighash_type)
+            .is_sighash_single_bug()?
+        {
+            Ok(LegacySighash::from_byte_array(UINT256_ONE))
+        } else {
+            Ok(LegacySighash::from_engine(enc))
+        }
+    }
+
+    #[inline]
+    fn common_cache(&mut self) -> &CommonCache {
+        Self::common_cache_minimal_borrow(&mut self.common_cache, self.tx.borrow())
+    }
+
+    fn common_cache_minimal_borrow<'a>(
+        common_cache: &'a mut Option<CommonCache>,
+        tx: &Transaction,
+    ) -> &'a CommonCache {
+        common_cache.get_or_insert_with(|| {
+            let mut enc_prevouts = sha256::Hash::engine();
+            let mut enc_sequences = sha256::Hash::engine();
+            for txin in tx.input.iter() {
+                txin.previous_output.consensus_encode(&mut enc_prevouts).unwrap();
+                txin.sequence.consensus_encode(&mut enc_sequences).unwrap();
+            }
+            CommonCache {
+                prevouts: sha256::Hash::from_engine(enc_prevouts),
+                sequences: sha256::Hash::from_engine(enc_sequences),
+                outputs: {
+                    let mut enc = sha256::Hash::engine();
+                    for txout in tx.output.iter() {
+                        txout.consensus_encode(&mut enc).unwrap();
+                    }
+                    sha256::Hash::from_engine(enc)
+                },
+            }
+        })
+    }
+
+    fn segwit_cache(&mut self) -> &SegwitCache {
+        let common_cache = &mut self.common_cache;
+        let tx = self.tx.borrow();
+        self.segwit_cache.get_or_insert_with(|| {
+            let common_cache = Self::common_cache_minimal_borrow(common_cache, tx);
+            SegwitCache {
+                prevouts: common_cache.prevouts.hash_again(),
+                sequences: common_cache.sequences.hash_again(),
+                outputs: common_cache.outputs.hash_again(),
+            }
+        })
+    }
+
+    fn taproot_cache<T: Borrow<TxOut>>(&mut self, prevouts: &[T]) -> &TaprootCache {
+        self.taproot_cache.get_or_insert_with(|| {
+            let mut enc_amounts = sha256::Hash::engine();
+            let mut enc_script_pubkeys = sha256::Hash::engine();
+            for prevout in prevouts {
+                prevout.borrow().value.consensus_encode(&mut enc_amounts).unwrap();
+                prevout.borrow().script_pubkey.consensus_encode(&mut enc_script_pubkeys).unwrap();
+            }
+            TaprootCache {
+                amounts: sha256::Hash::from_engine(enc_amounts),
+                script_pubkeys: sha256::Hash::from_engine(enc_script_pubkeys),
+            }
+        })
+    }
+}
+
+impl<R: BorrowMut<Transaction>> SighashCache<R> {
+    /// When the `SighashCache` is initialized with a mutable reference to a transaction instead of
+    /// a regular reference, this method is available to allow modification to the witnesses.
+    ///
+    /// This allows in-line signing such as
+    /// ```
+    /// use dashcore::{absolute, Transaction, Script};
+    /// use dashcore::sighash::{EcdsaSighashType, SighashCache};
+    ///
+    /// let mut tx_to_sign = Transaction { version: 2, lock_time: 0, input: Vec::new(), output: Vec::new(), special_transaction_payload: None};
+    /// let input_count = tx_to_sign.input.len();
+    ///
+    /// let mut sig_hasher = SighashCache::new(&mut tx_to_sign);
+    /// for inp in 0..input_count {
+    ///     let prevout_script = Script::empty();
+    ///     let _sighash = sig_hasher.segwit_signature_hash(inp, prevout_script, 42, EcdsaSighashType::All);
+    ///     // ... sign the sighash
+    ///     sig_hasher.witness_mut(inp).unwrap().push(&Vec::new());
+    /// }
+    /// ```
+    pub fn witness_mut(&mut self, input_index: usize) -> Option<&mut Witness> {
+        self.tx.borrow_mut().input.get_mut(input_index).map(|i| &mut i.witness)
+    }
+}
+
+impl From<io::Error> for Error {
+    fn from(e: io::Error) -> Self { Error::Io(e.kind()) }
+}
+
+/// The `Annex` struct is a slice wrapper enforcing first byte is `0x50`.
+#[derive(Clone, PartialEq, Eq, Hash, Debug)]
+pub struct Annex<'a>(&'a [u8]);
+
+impl<'a> Annex<'a> {
+    /// Creates a new `Annex` struct checking the first byte is `0x50`.
+    pub fn new(annex_bytes: &'a [u8]) -> Result<Self, Error> {
+        if annex_bytes.first() == Some(&TAPROOT_ANNEX_PREFIX) {
+            Ok(Annex(annex_bytes))
+        } else {
+            Err(Error::WrongAnnex)
+        }
+    }
+
+    /// Returns the Annex bytes data (including first byte `0x50`).
+    pub fn as_bytes(&self) -> &[u8] { self.0 }
+}
+
+impl<'a> Encodable for Annex<'a> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        encode::consensus_encode_with_size(self.0, w)
+    }
+}
+
+fn is_invalid_use_of_sighash_single(sighash: u32, input_index: usize, output_len: usize) -> bool {
+    let ty = EcdsaSighashType::from_consensus(sighash);
+    ty == EcdsaSighashType::Single && input_index >= output_len
+}
+
+#[cfg(test)]
+mod tests {
+    use std::str::FromStr;
+
+    use hashes::HashEngine;
+
+    use super::*;
+    use crate::address::Address;
+    use crate::consensus::deserialize;
+    use crate::crypto::key::PublicKey;
+    use crate::crypto::sighash::{LegacySighash, TapSighash};
+    use crate::internal_macros::hex;
+    use crate::network::constants::Network;
+    use crate::taproot::TapLeafHash;
+
+    extern crate serde_json;
+
+    #[test]
+    fn sighash_single_bug() {
+        const SIGHASH_SINGLE: u32 = 3;
+
+        // We need a tx with more inputs than outputs.
+        let tx = Transaction {
+            version: 1,
+            lock_time: 0,
+            input: vec![TxIn::default(), TxIn::default()],
+            output: vec![TxOut::default()],
+            special_transaction_payload: None,
+        };
+        let script = ScriptBuf::new();
+        let cache = SighashCache::new(&tx);
+
+        let got = cache.legacy_signature_hash(1, &script, SIGHASH_SINGLE).expect("sighash");
+        let want = LegacySighash::from_slice(&UINT256_ONE).unwrap();
+
+        assert_eq!(got, want)
+    }
+
+    #[ignore]
+    #[test]
+    #[cfg(feature = "serde")]
+    fn legacy_sighash() {
+        use serde_json::Value;
+
+        use crate::sighash::SighashCache;
+
+        fn run_test_sighash(
+            tx: &str,
+            script: &str,
+            input_index: usize,
+            hash_type: i64,
+            expected_result: &str,
+        ) {
+            let tx_bytes = hex!(tx);
+            let tx: Transaction = deserialize(tx_bytes.as_slice()).unwrap();
+            let script = ScriptBuf::from(hex!(script));
+            let mut raw_expected = hex!(expected_result);
+            raw_expected.reverse();
+            let want = LegacySighash::from_slice(&raw_expected[..]).unwrap();
+
+            let cache = SighashCache::new(&tx);
+            let got = cache.legacy_signature_hash(input_index, &script, hash_type as u32).unwrap();
+
+            assert_eq!(got, want);
+        }
+
+        // These test vectors were stolen from libbtc, which is Copyright 2014 Jonas Schnelli MIT
+        // They were transformed by replacing {...} with run_test_sighash(...), then the ones containing
+        // OP_CODESEPARATOR in their pubkeys were removed
+        let data = include_str!("../../tests/data/legacy_sighash.json");
+
+        let testdata = serde_json::from_str::<Value>(data).unwrap().as_array().unwrap().clone();
+        for t in testdata.iter().skip(1) {
+            let tx = t.get(0).unwrap().as_str().unwrap();
+            let script = t.get(1).unwrap().as_str().unwrap_or("");
+            let input_index = t.get(2).unwrap().as_u64().unwrap();
+            let hash_type = t.get(3).unwrap().as_i64().unwrap();
+            let expected_sighash = t.get(4).unwrap().as_str().unwrap();
+            run_test_sighash(tx, script, input_index as usize, hash_type, expected_sighash);
+        }
+    }
+
+    #[test]
+    fn test_tap_sighash_hash() {
+        let bytes = hex!("00011b96877db45ffa23b307e9f0ac87b80ef9a80b4c5f0db3fbe734422453e83cc5576f3d542c5d4898fb2b696c15d43332534a7c1d1255fda38993545882df92c3e353ff6d36fbfadc4d168452afd8467f02fe53d71714fcea5dfe2ea759bd00185c4cb02bc76d42620393ca358a1a713f4997f9fc222911890afb3fe56c6a19b202df7bffdcfad08003821294279043746631b00e2dc5e52a111e213bbfe6ef09a19428d418dab0d50000000000");
+        let expected = hex!("04e808aad07a40b3767a1442fead79af6ef7e7c9316d82dec409bb31e77699b0");
+        let mut enc = TapSighash::engine();
+        enc.input(&bytes);
+        let hash = TapSighash::from_engine(enc);
+        assert_eq!(expected, hash.to_byte_array());
+    }
+
+    #[ignore]
+    #[test]
+    fn test_sighashes_keyspending() {
+        // following test case has been taken from Bitcoin Core test framework
+
+        test_taproot_sighash(
+            "020000000164eb050a5e3da0c2a65e4786f26d753b7bc69691fabccafb11f7acef36641f1846010000003101b2b404392a22000000000017a9147f2bde86fe78bf68a0544a4f290e12f0b7e0a08c87580200000000000017a91425d11723074ecfb96a0a83c3956bfaf362ae0c908758020000000000001600147e20f938993641de67bb0cdd71682aa34c4d29ad5802000000000000160014c64984dc8761acfa99418bd6bedc79b9287d652d72000000",
+            "01365724000000000023542156b39dab4f8f3508e0432cfb41fab110170acaa2d4c42539cb90a4dc7c093bc500",
+            0,
+            "33ca0ebfb4a945eeee9569fc0f5040221275f88690b7f8592ada88ce3bdf6703",
+            TapSighashType::Default, None, None, None,
+        );
+
+        test_taproot_sighash(
+            "0200000002fff49be59befe7566050737910f6ccdc5e749c7f8860ddc140386463d88c5ad0f3000000002cf68eb4a3d67f9d4c079249f7e4f27b8854815cb1ed13842d4fbf395f9e217fd605ee24090100000065235d9203f458520000000000160014b6d48333bb13b4c644e57c43a9a26df3a44b785e58020000000000001976a914eea9461a9e1e3f765d3af3e726162e0229fe3eb688ac58020000000000001976a9143a8869c9f2b5ea1d4ff3aeeb6a8fb2fffb1ad5fe88ac0ad7125c",
+            "02591f220000000000225120f25ad35583ea31998d968871d7de1abd2a52f6fe4178b54ea158274806ff4ece48fb310000000000225120f25ad35583ea31998d968871d7de1abd2a52f6fe4178b54ea158274806ff4ece",
+            1,
+            "626ab955d58c9a8a600a0c580549d06dc7da4e802eb2a531f62a588e430967a8",
+            TapSighashType::All, None, None, None,
+        );
+
+        test_taproot_sighash(
+            "0200000001350005f65aa830ced2079df348e2d8c2bdb4f10e2dde6a161d8a07b40d1ad87dae000000001611d0d603d9dc0e000000000017a914459b6d7d6bbb4d8837b4bf7e9a4556f952da2f5c8758020000000000001976a9141dd70e1299ffc2d5b51f6f87de9dfe9398c33cbb88ac58020000000000001976a9141dd70e1299ffc2d5b51f6f87de9dfe9398c33cbb88aca71c1f4f",
+            "01c4811000000000002251201bf9297d0a2968ae6693aadd0fa514717afefd218087a239afb7418e2d22e65c",
+            0,
+            "dfa9437f9c9a1d1f9af271f79f2f5482f287cdb0d2e03fa92c8a9b216cc6061c",
+            TapSighashType::AllPlusAnyoneCanPay, None, None, None,
+        );
+
+        test_taproot_sighash(
+            "020000000185bed1a6da2bffbd60ec681a1bfb71c5111d6395b99b3f8b2bf90167111bcb18f5010000007c83ace802ded24a00000000001600142c4698f9f7a773866879755aa78c516fb332af8e5802000000000000160014d38639dfbac4259323b98a472405db0c461b31fa61073747",
+            "0144c84d0000000000225120e3f2107989c88e67296ab2faca930efa2e3a5bd3ff0904835a11c9e807458621",
+            0,
+            "3129de36a5d05fff97ffca31eb75fcccbbbc27b3147a7a36a9e4b45d8b625067",
+            TapSighashType::None, None, None, None,
+        );
+
+        test_taproot_sighash(
+            "eb93dbb901028c8515589dac980b6e7f8e4088b77ed866ca0d6d210a7218b6fd0f6b22dd6d7300000000eb4740a9047efc0e0000000000160014913da2128d8fcf292b3691db0e187414aa1783825802000000000000160014913da2128d8fcf292b3691db0e187414aa178382580200000000000017a9143dd27f01c6f7ef9bb9159937b17f17065ed01a0c875802000000000000160014d7630e19df70ada9905ede1722b800c0005f246641000000",
+            "013fed110000000000225120eb536ae8c33580290630fc495046e998086a64f8f33b93b07967d9029b265c55",
+            0,
+            "2441e8b0e063a2083ee790f14f2045022f07258ddde5ee01de543c9e789d80ae",
+            TapSighashType::NonePlusAnyoneCanPay, None, None, None,
+        );
+
+        test_taproot_sighash(
+            "02000000017836b409a5fed32211407e44b971591f2032053f14701fb5b3a30c0ff382f2cc9c0100000061ac55f60288fb5600000000001976a9144ea02f6f182b082fb6ce47e36bbde390b6a41b5088ac58020000000000001976a9144ea02f6f182b082fb6ce47e36bbde390b6a41b5088ace4000000",
+            "01efa558000000000022512007071ea3dc7e331b0687d0193d1e6d6ed10e645ef36f10ef8831d5e522ac9e80",
+            0,
+            "30239345177cadd0e3ea413d49803580abb6cb27971b481b7788a78d35117a88",
+            TapSighashType::Single, None, None, None,
+        );
+
+        test_taproot_sighash(
+            "0100000001aa6deae89d5e0aaca58714fc76ef6f3c8284224888089232d4e663843ed3ab3eae010000008b6657a60450cb4c0000000000160014a3d42b5413ef0c0701c4702f3cd7d4df222c147058020000000000001976a91430b4ed8723a4ee8992aa2c8814cfe5c3ad0ab9d988ac5802000000000000160014365b1166a6ed0a5e8e9dff17a6d00bbb43454bc758020000000000001976a914bc98c51a84fe7fad5dc380eb8b39586eff47241688ac4f313247",
+            "0107af4e00000000002251202c36d243dfc06cb56a248e62df27ecba7417307511a81ae61aa41c597a929c69",
+            0,
+            "bf9c83f26c6dd16449e4921f813f551c4218e86f2ec906ca8611175b41b566df",
+            TapSighashType::SinglePlusAnyoneCanPay, None, None, None,
+        );
+    }
+
+    #[ignore]
+    #[test]
+    fn test_sighashes_with_annex() {
+        test_taproot_sighash(
+            "0200000001df8123752e8f37d132c4e9f1ff7e4f9b986ade9211267e9ebd5fd22a5e718dec6d01000000ce4023b903cb7b23000000000017a914a18b36ea7a094db2f4940fc09edf154e86de7bd787580200000000000017a914afd0d512a2c5c2b40e25669e9cc460303c325b8b87580200000000000017a914a18b36ea7a094db2f4940fc09edf154e86de7bd787f6020000",
+            "01ea49260000000000225120ab5e9800806bf18cb246edcf5fe63441208fe955a4b5a35bbff65f5db622a010",
+            0,
+            "3b003000add359a364a156e73e02846782a59d0d95ca8c4638aaad99f2ef915c",
+            TapSighashType::SinglePlusAnyoneCanPay,
+            Some("507b979802e62d397acb29f56743a791894b99372872fc5af06a4f6e8d242d0615cda53062bb20e6ec79756fe39183f0c128adfe85559a8fa042b042c018aa8010143799e44f0893c40e1e"),
+            None,
+            None,
+        );
+    }
+
+    #[ignore]
+    #[test]
+    fn test_sighashes_with_script_path() {
+        test_taproot_sighash(
+            "020000000189fc651483f9296b906455dd939813bf086b1bbe7c77635e157c8e14ae29062195010000004445b5c7044561320000000000160014331414dbdada7fb578f700f38fb69995fc9b5ab958020000000000001976a914268db0a8104cc6d8afd91233cc8b3d1ace8ac3ef88ac580200000000000017a914ec00dcb368d6a693e11986d265f659d2f59e8be2875802000000000000160014c715799a49a0bae3956df9c17cb4440a673ac0df6f010000",
+            "011bec34000000000022512028055142ea437db73382e991861446040b61dd2185c4891d7daf6893d79f7182",
+            0,
+            "d66de5274a60400c7b08c86ba6b7f198f40660079edf53aca89d2a9501317f2e",
+            TapSighashType::All,
+            None,
+            Some("20cc4e1107aea1d170c5ff5b6817e1303010049724fb3caa7941792ea9d29b3e2bacab"),
+            None,
+        );
+    }
+
+    #[ignore]
+    #[test]
+    fn test_sighashes_with_script_path_raw_hash() {
+        test_taproot_sighash(
+            "020000000189fc651483f9296b906455dd939813bf086b1bbe7c77635e157c8e14ae29062195010000004445b5c7044561320000000000160014331414dbdada7fb578f700f38fb69995fc9b5ab958020000000000001976a914268db0a8104cc6d8afd91233cc8b3d1ace8ac3ef88ac580200000000000017a914ec00dcb368d6a693e11986d265f659d2f59e8be2875802000000000000160014c715799a49a0bae3956df9c17cb4440a673ac0df6f010000",
+            "011bec34000000000022512028055142ea437db73382e991861446040b61dd2185c4891d7daf6893d79f7182",
+            0,
+            "d66de5274a60400c7b08c86ba6b7f198f40660079edf53aca89d2a9501317f2e",
+            TapSighashType::All,
+            None,
+            None,
+            Some("15a2530514e399f8b5cf0b3d3112cf5b289eaa3e308ba2071b58392fdc6da68a"),
+        );
+    }
+
+    #[test]
+    fn test_sighashes_with_annex_and_script() {
+        test_taproot_sighash(
+            "020000000132fb72cb8fba496755f027a9743e2d698c831fdb8304e4d1a346ac92cbf51acba50100000026bdc7df044aad34000000000017a9144fa2554ed6174586854fa3bc01de58dcf33567d0875802000000000000160014950367e1e62cdf240b35b883fc2f5e39f0eb9ab95802000000000000160014950367e1e62cdf240b35b883fc2f5e39f0eb9ab958020000000000001600141b31217d48ccc8760dcc0710fade5866d628e733a02d5122",
+            "011458360000000000225120a7baec3fb9f84614e3899fcc010c638f80f13539344120e1f4d8b68a9a011a13",
+            0,
+            "a0042aa434f9a75904b64043f2a283f8b4c143c7f4f7f49a6cbe5b9f745f4c15",
+            TapSighashType::All,
+            Some("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"),
+            Some("7520ab9160dd8299dc1367659be3e8f66781fe440d52940c7f8d314a89b9f2698d406ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6eadac"),
+            None,
+        );
+    }
+
+    #[test]
+    #[rustfmt::skip] // Allow long function call `taproot_signature_hash`.
+    fn test_sighash_errors() {
+        let dumb_tx = Transaction {
+            version: 0,
+            lock_time: 0,
+            input: vec![TxIn::default()],
+            output: vec![],
+            special_transaction_payload: None,
+        };
+        let mut c = SighashCache::new(&dumb_tx);
+
+        // 1.29 fixes
+        let empty_vec = vec![];
+        let empty_prevouts: Prevouts<TxOut> = Prevouts::All(&empty_vec);
+        assert_eq!(
+            c.taproot_signature_hash(0, &empty_prevouts, None, None, TapSighashType::All),
+            Err(Error::PrevoutsSize)
+        );
+        let two = vec![TxOut::default(), TxOut::default()];
+        let too_many_prevouts = Prevouts::All(&two);
+        assert_eq!(
+            c.taproot_signature_hash(0, &too_many_prevouts, None, None, TapSighashType::All),
+            Err(Error::PrevoutsSize)
+        );
+        let tx_out = TxOut::default();
+        let prevout = Prevouts::One(1, &tx_out);
+        assert_eq!(
+            c.taproot_signature_hash(0, &prevout, None, None, TapSighashType::All),
+            Err(Error::PrevoutKind)
+        );
+        assert_eq!(
+            c.taproot_signature_hash(0, &prevout, None, None, TapSighashType::AllPlusAnyoneCanPay),
+            Err(Error::PrevoutIndex)
+        );
+        assert_eq!(
+            c.taproot_signature_hash(10, &prevout, None, None, TapSighashType::AllPlusAnyoneCanPay),
+            Err(Error::IndexOutOfInputsBounds {
+                index: 10,
+                inputs_size: 1,
+            })
+        );
+        let prevout = Prevouts::One(0, &tx_out);
+        assert_eq!(
+            c.taproot_signature_hash(0, &prevout, None, None, TapSighashType::SinglePlusAnyoneCanPay),
+            Err(Error::SingleWithoutCorrespondingOutput {
+                index: 0,
+                outputs_size: 0,
+            })
+        );
+        assert_eq!(
+            c.legacy_signature_hash(10, Script::empty(), 0u32),
+            Err(Error::IndexOutOfInputsBounds {
+                index: 10,
+                inputs_size: 1,
+            })
+        );
+    }
+
+    #[test]
+    fn test_annex_errors() {
+        assert_eq!(Annex::new(&[]), Err(Error::WrongAnnex));
+        assert_eq!(Annex::new(&[0x51]), Err(Error::WrongAnnex));
+        assert_eq!(Annex::new(&[0x51, 0x50]), Err(Error::WrongAnnex));
+    }
+
+    #[allow(clippy::too_many_arguments)]
+    fn test_taproot_sighash(
+        tx_hex: &str,
+        prevout_hex: &str,
+        input_index: usize,
+        expected_hash: &str,
+        sighash_type: TapSighashType,
+        annex_hex: Option<&str>,
+        script_hex: Option<&str>,
+        script_leaf_hash: Option<&str>,
+    ) {
+        let tx_bytes = hex!(tx_hex);
+        let tx: Transaction = deserialize(&tx_bytes).unwrap();
+        let prevout_bytes = hex!(prevout_hex);
+        let prevouts: Vec<TxOut> = deserialize(&prevout_bytes).unwrap();
+        let annex_inner;
+        let annex = match annex_hex {
+            Some(annex_hex) => {
+                annex_inner = hex!(annex_hex);
+                Some(Annex::new(&annex_inner.as_slice()).unwrap())
+            }
+            None => None,
+        };
+
+        let leaf_hash = match (script_hex, script_leaf_hash) {
+            (Some(script_hex), _) => {
+                let script_inner = ScriptBuf::from_hex(script_hex).unwrap();
+                Some(ScriptPath::with_defaults(&script_inner).leaf_hash())
+            }
+            (_, Some(script_leaf_hash)) => Some(script_leaf_hash.parse::<TapLeafHash>().unwrap()),
+            _ => None,
+        };
+        // All our tests use the default `0xFFFFFFFF` codeseparator value
+        let leaf_hash = leaf_hash.map(|lh| (lh, 0xFFFFFFFF));
+
+        let prevouts = if sighash_type.split_anyonecanpay_flag().1 && tx_bytes[0] % 2 == 0 {
+            // for anyonecanpay the `Prevouts::All` variant is good anyway, but sometimes we want to
+            // test other codepaths
+            Prevouts::One(input_index, prevouts[input_index].clone())
+        } else {
+            Prevouts::All(&prevouts)
+        };
+
+        let mut sighash_cache = SighashCache::new(&tx);
+
+        let hash = sighash_cache
+            .taproot_signature_hash(input_index, &prevouts, annex, leaf_hash, sighash_type)
+            .unwrap();
+        let expected = hex!(expected_hash);
+        assert_eq!(expected, hash.to_byte_array());
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn bip_341_sighash_tests() {
+        fn sighash_deser_numeric<'de, D>(deserializer: D) -> Result<TapSighashType, D::Error>
+            where
+                D: actual_serde::Deserializer<'de>,
+        {
+            use actual_serde::de::{Deserialize, Error, Unexpected};
+
+            let raw = u8::deserialize(deserializer)?;
+            TapSighashType::from_consensus_u8(raw).map_err(|_| {
+                D::Error::invalid_value(
+                    Unexpected::Unsigned(raw.into()),
+                    &"number in range 0-3 or 0x81-0x83",
+                )
+            })
+        }
+
+        use secp256k1::{self, SecretKey, XOnlyPublicKey};
+
+        use crate::consensus::serde as con_serde;
+        use crate::taproot::{TapNodeHash, TapTweakHash};
+
+        #[derive(serde::Deserialize)]
+        #[serde(crate = "actual_serde")]
+        struct UtxoSpent {
+            #[serde(rename = "scriptPubKey")]
+            script_pubkey: ScriptBuf,
+            #[serde(rename = "amountSats")]
+            value: u64,
+        }
+
+        #[derive(serde::Deserialize)]
+        #[serde(rename_all = "camelCase")]
+        #[serde(crate = "actual_serde")]
+        struct KpsGiven {
+            #[serde(with = "con_serde::With::<con_serde::Hex>")]
+            raw_unsigned_tx: Transaction,
+            utxos_spent: Vec<UtxoSpent>,
+        }
+
+        #[derive(serde::Deserialize)]
+        #[serde(rename_all = "camelCase")]
+        #[serde(crate = "actual_serde")]
+        struct KpsIntermediary {
+            hash_prevouts: sha256::Hash,
+            hash_outputs: sha256::Hash,
+            hash_sequences: sha256::Hash,
+            hash_amounts: sha256::Hash,
+            hash_script_pubkeys: sha256::Hash,
+        }
+
+        #[derive(serde::Deserialize)]
+        #[serde(rename_all = "camelCase")]
+        #[serde(crate = "actual_serde")]
+        struct KpsInputSpendingGiven {
+            txin_index: usize,
+            internal_privkey: SecretKey,
+            merkle_root: Option<TapNodeHash>,
+            #[serde(deserialize_with = "sighash_deser_numeric")]
+            hash_type: TapSighashType,
+        }
+
+        #[derive(serde::Deserialize)]
+        #[serde(rename_all = "camelCase")]
+        #[serde(crate = "actual_serde")]
+        struct KpsInputSpendingIntermediary {
+            internal_pubkey: XOnlyPublicKey,
+            tweak: TapTweakHash,
+            tweaked_privkey: SecretKey,
+            sig_msg: String,
+            //precomputed_used: Vec<String>, // unused
+            sig_hash: TapSighash,
+        }
+
+        #[derive(serde::Deserialize)]
+        #[serde(rename_all = "camelCase")]
+        #[serde(crate = "actual_serde")]
+        struct KpsInputSpendingExpected {
+            witness: Vec<String>,
+        }
+
+        #[derive(serde::Deserialize)]
+        #[serde(rename_all = "camelCase")]
+        #[serde(crate = "actual_serde")]
+        struct KpsInputSpending {
+            given: KpsInputSpendingGiven,
+            intermediary: KpsInputSpendingIntermediary,
+            expected: KpsInputSpendingExpected,
+            // auxiliary: KpsAuxiliary, //unused
+        }
+
+        #[derive(serde::Deserialize)]
+        #[serde(rename_all = "camelCase")]
+        #[serde(crate = "actual_serde")]
+        struct KeyPathSpending {
+            given: KpsGiven,
+            intermediary: KpsIntermediary,
+            input_spending: Vec<KpsInputSpending>,
+        }
+
+        #[derive(serde::Deserialize)]
+        #[serde(rename_all = "camelCase")]
+        #[serde(crate = "actual_serde")]
+        struct TestData {
+            version: u64,
+            key_path_spending: Vec<KeyPathSpending>,
+            //script_pubkey: Vec<ScriptPubKey>, // unused
+        }
+
+        let json_str = include_str!("../../tests/data/bip341_tests.json");
+        let mut data =
+            serde_json::from_str::<TestData>(json_str).expect("JSON was not well-formatted");
+
+        assert_eq!(data.version, 1u64);
+        let secp = &secp256k1::Secp256k1::new();
+        let key_path = data.key_path_spending.remove(0);
+
+        let raw_unsigned_tx = key_path.given.raw_unsigned_tx;
+        let utxos = key_path
+            .given
+            .utxos_spent
+            .into_iter()
+            .map(|txo| TxOut { value: txo.value, script_pubkey: txo.script_pubkey })
+            .collect::<Vec<_>>();
+
+        // Test intermediary
+        let mut cache = SighashCache::new(&raw_unsigned_tx);
+
+        let expected = key_path.intermediary;
+        // Compute all caches
+        assert_eq!(expected.hash_amounts, cache.taproot_cache(&utxos).amounts);
+        assert_eq!(expected.hash_outputs, cache.common_cache().outputs);
+        assert_eq!(expected.hash_prevouts, cache.common_cache().prevouts);
+        assert_eq!(expected.hash_script_pubkeys, cache.taproot_cache(&utxos).script_pubkeys);
+        assert_eq!(expected.hash_sequences, cache.common_cache().sequences);
+
+        for mut inp in key_path.input_spending {
+            let tx_ind = inp.given.txin_index;
+            let internal_priv_key = inp.given.internal_privkey;
+            let merkle_root = inp.given.merkle_root;
+            let hash_ty = inp.given.hash_type;
+
+            let expected = inp.intermediary;
+            let sig_str = inp.expected.witness.remove(0);
+            let (expected_key_spend_sig, expected_hash_ty) = if sig_str.len() == 128 {
+                (
+                    secp256k1::schnorr::Signature::from_str(&sig_str).unwrap(),
+                    TapSighashType::Default,
+                )
+            } else {
+                let hash_ty = u8::from_str_radix(&sig_str[128..130], 16).unwrap();
+                let hash_ty = TapSighashType::from_consensus_u8(hash_ty).unwrap();
+                (secp256k1::schnorr::Signature::from_str(&sig_str[..128]).unwrap(), hash_ty)
+            };
+
+            // tests
+            let keypair = secp256k1::KeyPair::from_secret_key(secp, &internal_priv_key);
+            let (internal_key, _parity) = XOnlyPublicKey::from_keypair(&keypair);
+            let tweak = TapTweakHash::from_key_and_tweak(internal_key, merkle_root);
+            let tweaked_keypair = keypair.add_xonly_tweak(secp, &tweak.to_scalar()).unwrap();
+            let mut sig_msg = Vec::new();
+            cache
+                .taproot_encode_signing_data_to(
+                    &mut sig_msg,
+                    tx_ind,
+                    &Prevouts::All(&utxos),
+                    None,
+                    None,
+                    hash_ty,
+                )
+                .unwrap();
+            let sighash = cache
+                .taproot_signature_hash(tx_ind, &Prevouts::All(&utxos), None, None, hash_ty)
+                .unwrap();
+
+            let msg = secp256k1::Message::from(sighash);
+            let key_spend_sig = secp.sign_schnorr_with_aux_rand(&msg, &tweaked_keypair, &[0u8; 32]);
+
+            assert_eq!(expected.internal_pubkey, internal_key);
+            assert_eq!(expected.tweak, tweak);
+            assert_eq!(expected.sig_msg, sig_msg.to_lower_hex_string());
+            assert_eq!(expected.sig_hash, sighash);
+            assert_eq!(expected_hash_ty, hash_ty);
+            assert_eq!(expected_key_spend_sig, key_spend_sig);
+
+            let tweaked_priv_key = SecretKey::from_keypair(&tweaked_keypair);
+            assert_eq!(expected.tweaked_privkey, tweaked_priv_key);
+        }
+    }
+
+    #[test]
+    fn sighashtype_fromstr_display() {
+        let sighashtypes = vec![
+            ("SIGHASH_DEFAULT", TapSighashType::Default),
+            ("SIGHASH_ALL", TapSighashType::All),
+            ("SIGHASH_NONE", TapSighashType::None),
+            ("SIGHASH_SINGLE", TapSighashType::Single),
+            ("SIGHASH_ALL|SIGHASH_ANYONECANPAY", TapSighashType::AllPlusAnyoneCanPay),
+            ("SIGHASH_NONE|SIGHASH_ANYONECANPAY", TapSighashType::NonePlusAnyoneCanPay),
+            ("SIGHASH_SINGLE|SIGHASH_ANYONECANPAY", TapSighashType::SinglePlusAnyoneCanPay),
+        ];
+        for (s, sht) in sighashtypes {
+            assert_eq!(sht.to_string(), s);
+            assert_eq!(TapSighashType::from_str(s).unwrap(), sht);
+        }
+        let sht_mistakes = vec![
+            "SIGHASH_ALL | SIGHASH_ANYONECANPAY",
+            "SIGHASH_NONE |SIGHASH_ANYONECANPAY",
+            "SIGHASH_SINGLE| SIGHASH_ANYONECANPAY",
+            "SIGHASH_ALL SIGHASH_ANYONECANPAY",
+            "SIGHASH_NONE |",
+            "SIGHASH_SIGNLE",
+            "DEFAULT",
+            "ALL",
+            "sighash_none",
+            "Sighash_none",
+            "SigHash_None",
+            "SigHash_NONE",
+        ];
+        for s in sht_mistakes {
+            assert_eq!(
+                TapSighashType::from_str(s).unwrap_err().to_string(),
+                format!("Unrecognized SIGHASH string '{}'", s)
+            );
+        }
+    }
+
+    fn p2pkh_hex(pk: &str) -> ScriptBuf {
+        let pk: PublicKey = PublicKey::from_str(pk).unwrap();
+        Address::p2pkh(&pk, Network::Dash).script_pubkey()
+    }
+
+    #[test]
+    fn bip143_p2wpkh() {
+        let tx = deserialize::<Transaction>(
+            &hex!(
+                "0100000002fff7f7881a8099afa6940d42d1e7f6362bec38171ea3edf433541db4e4ad969f000000\
+                0000eeffffffef51e1b804cc89d182d279655c3aa89e815b1b309fe287d9b2b55d57b90ec68a01000000\
+                00ffffffff02202cb206000000001976a9148280b37df378db99f66f85c95a783a76ac7a6d5988ac9093\
+                510d000000001976a9143bde42dbee7e4dbe6a21b2d50ce2f0167faa815988ac11000000"
+            ),
+        ).unwrap();
+
+        let witness_script =
+            p2pkh_hex("025476c2e83188368da1ff3e292e7acafcdb3566bb0ad253f62fc70f07aeee6357");
+        let value = 600_000_000;
+
+        let mut cache = SighashCache::new(&tx);
+        assert_eq!(
+            cache.segwit_signature_hash(1, &witness_script, value, EcdsaSighashType::All).unwrap(),
+            "313ca7f8ba3ad9da3eb040a61e2768eceb7126d610c13dbd440fdc3e1f1d07e0"
+                .parse::<SegwitV0Sighash>()
+                .unwrap(),
+        );
+
+        let cache = cache.segwit_cache();
+        // Parse hex into Vec because BIP143 test vector displays forwards but our sha256d::Hash displays backwards.
+        assert_eq!(
+            cache.prevouts.as_byte_array(),
+            hex!("96b827c8483d4e9b96712b6713a7b68d6e8003a781feba36c31143470b4efd37").as_slice(),
+        );
+        assert_eq!(
+            cache.sequences.as_byte_array(),
+            hex!("52b0a642eea2fb7ae638c36f6252b6750293dbe574a806984b8e4d8548339a3b").as_slice(),
+        );
+        assert_eq!(
+            cache.outputs.as_byte_array(),
+            hex!("863ef3e1a92afbfdb97f31ad0fc7683ee943e9abcf2501590ff8f6551f47e5e5").as_slice(),
+        );
+    }
+
+    #[test]
+    fn bip143_p2wpkh_nested_in_p2sh() {
+        let tx = deserialize::<Transaction>(
+            &hex!(
+                "0100000001db6b1b20aa0fd7b23880be2ecbd4a98130974cf4748fb66092ac4d3ceb1a5477010000\
+                0000feffffff02b8b4eb0b000000001976a914a457b684d7f0d539a46a45bbc043f35b59d0d96388ac00\
+                08af2f000000001976a914fd270b1ee6abcaea97fea7ad0402e8bd8ad6d77c88ac92040000"
+            ),
+        ).unwrap();
+
+        let witness_script =
+            p2pkh_hex("03ad1d8e89212f0b92c74d23bb710c00662ad1470198ac48c43f7d6f93a2a26873");
+        let value = 1_000_000_000;
+
+        let mut cache = SighashCache::new(&tx);
+        assert_eq!(
+            cache.segwit_signature_hash(0, &witness_script, value, EcdsaSighashType::All).unwrap(),
+            "1c9c7380e80e8b12f62b896cb2a2f994c5f5d86ebb8b803bfdeab385ffd3a7a9"
+                .parse::<SegwitV0Sighash>()
+                .unwrap(),
+        );
+
+        let cache = cache.segwit_cache();
+        // Parse hex into Vec because BIP143 test vector displays forwards but our sha256d::Hash displays backwards.
+        assert_eq!(
+            cache.prevouts.as_byte_array(),
+            hex!("b0287b4a252ac05af83d2dcef00ba313af78a3e9c329afa216eb3aa2a7b4613a").as_slice(),
+        );
+        assert_eq!(
+            cache.sequences.as_byte_array(),
+            hex!("18606b350cd8bf565266bc352f0caddcf01e8fa789dd8a15386327cf8cabe198").as_slice(),
+        );
+        assert_eq!(
+            cache.outputs.as_byte_array(),
+            hex!("de984f44532e2173ca0d64314fcefe6d30da6f8cf27bafa706da61df8a226c83").as_slice(),
+        );
+    }
+
+    #[test]
+    fn bip143_p2wsh_nested_in_p2sh() {
+        let tx = deserialize::<Transaction>(&hex!(
+            "010000000136641869ca081e70f394c6948e8af409e18b619df2ed74aa106c1ca29787b96e0100000000\
+             ffffffff0200e9a435000000001976a914389ffce9cd9ae88dcc0631e88a821ffdbe9bfe2688acc0832f\
+             05000000001976a9147480a33f950689af511e6e84c138dbbd3c3ee41588ac00000000"
+        ))
+            .unwrap();
+
+        let witness_script = ScriptBuf::from_hex(
+            "56210307b8ae49ac90a048e9b53357a2354b3334e9c8bee813ecb98e99a7e07e8c3ba32103b28f0c28\
+             bfab54554ae8c658ac5c3e0ce6e79ad336331f78c428dd43eea8449b21034b8113d703413d57761b8b\
+             9781957b8c0ac1dfe69f492580ca4195f50376ba4a21033400f6afecb833092a9a21cfdf1ed1376e58\
+             c5d1f47de74683123987e967a8f42103a6d48b1131e94ba04d9737d61acdaa1322008af9602b3b1486\
+             2c07a1789aac162102d8b661b0b3302ee2f162b09e07a55ad5dfbe673a9f01d9f0c19617681024306b\
+             56ae",
+        )
+            .unwrap();
+        let value = 987654321;
+
+        let mut cache = SighashCache::new(&tx);
+        assert_eq!(
+            cache.segwit_signature_hash(0, &witness_script, value, EcdsaSighashType::All).unwrap(),
+            "3a892568a19aee7bb185d5b4f7359e3e20d09db39ea38fdaf73eb719394fde69"
+                .parse::<SegwitV0Sighash>()
+                .unwrap(),
+        );
+
+        let cache = cache.segwit_cache();
+        // Parse hex into Vec because BIP143 test vector displays forwards but our sha256d::Hash displays backwards.
+        assert_eq!(
+            cache.prevouts.as_byte_array(),
+            hex!("74afdc312af5183c4198a40ca3c1a275b485496dd3929bca388c4b5e31f7aaa0").as_slice(),
+        );
+        assert_eq!(
+            cache.sequences.as_byte_array(),
+            hex!("3bb13029ce7b1f559ef5e747fcac439f1455a2ec7c5f09b72290795e70665044").as_slice(),
+        );
+        assert_eq!(
+            cache.outputs.as_byte_array(),
+            hex!("bc4d309071414bed932f98832b27b4d76dad7e6c1346f487a8fdbb8eb90307cc").as_slice(),
+        );
+    }
+}
diff --git a/dash/src/crypto/taproot.rs b/dash/src/crypto/taproot.rs
new file mode 100644
index 000000000..eddc911d2
--- /dev/null
+++ b/dash/src/crypto/taproot.rs
@@ -0,0 +1,101 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+//! Bitcoin taproot keys.
+//!
+//! This module provides taproot keys used in Bitcoin (including reexporting secp256k1 keys).
+//!
+
+use core::fmt;
+
+use internals::write_err;
+pub use secp256k1::{self, constants, KeyPair, Parity, Secp256k1, Verification, XOnlyPublicKey};
+
+use crate::prelude::*;
+use crate::sighash::TapSighashType;
+
+/// A BIP340-341 serialized taproot signature with the corresponding hash type.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Signature {
+    /// The underlying schnorr signature
+    pub sig: secp256k1::schnorr::Signature,
+    /// The corresponding hash type
+    pub hash_ty: TapSighashType,
+}
+
+impl Signature {
+    /// Deserialize from slice
+    pub fn from_slice(sl: &[u8]) -> Result<Self, Error> {
+        match sl.len() {
+            64 => {
+                // default type
+                let sig =
+                    secp256k1::schnorr::Signature::from_slice(sl).map_err(Error::Secp256k1)?;
+                Ok(Signature { sig, hash_ty: TapSighashType::Default })
+            }
+            65 => {
+                let (hash_ty, sig) = sl.split_last().expect("Slice len checked == 65");
+                let hash_ty = TapSighashType::from_consensus_u8(*hash_ty)
+                    .map_err(|_| Error::InvalidSighashType(*hash_ty))?;
+                let sig =
+                    secp256k1::schnorr::Signature::from_slice(sig).map_err(Error::Secp256k1)?;
+                Ok(Signature { sig, hash_ty })
+            }
+            len => Err(Error::InvalidSignatureSize(len)),
+        }
+    }
+
+    /// Serialize Signature
+    pub fn to_vec(self) -> Vec<u8> {
+        // TODO: add support to serialize to a writer to SerializedSig
+        let mut ser_sig = self.sig.as_ref().to_vec();
+        if self.hash_ty == TapSighashType::Default {
+            // default sighash type, don't add extra sighash byte
+        } else {
+            ser_sig.push(self.hash_ty as u8);
+        }
+        ser_sig
+    }
+}
+
+/// A taproot sig related error.
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+#[non_exhaustive]
+pub enum Error {
+    /// Base58 encoding error
+    InvalidSighashType(u8),
+    /// Signature has valid size but does not parse correctly
+    Secp256k1(secp256k1::Error),
+    /// Invalid taproot signature size
+    InvalidSignatureSize(usize),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Error::InvalidSighashType(hash_ty) =>
+                write!(f, "invalid signature hash type {}", hash_ty),
+            Error::Secp256k1(ref e) =>
+                write_err!(f, "taproot signature has correct len but is malformed"; e),
+            Error::InvalidSignatureSize(sz) => write!(f, "invalid taproot signature size: {}", sz),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match self {
+            Secp256k1(e) => Some(e),
+            InvalidSighashType(_) | InvalidSignatureSize(_) => None,
+        }
+    }
+}
+
+impl From<secp256k1::Error> for Error {
+    fn from(e: secp256k1::Error) -> Error { Error::Secp256k1(e) }
+}
diff --git a/src/ephemerealdata/instant_lock.rs b/dash/src/ephemerealdata/instant_lock.rs
similarity index 59%
rename from src/ephemerealdata/instant_lock.rs
rename to dash/src/ephemerealdata/instant_lock.rs
index 652100b16..9c33fbe4b 100644
--- a/src/ephemerealdata/instant_lock.rs
+++ b/dash/src/ephemerealdata/instant_lock.rs
@@ -2,24 +2,23 @@
 //! confirm transaction within 1 or 2 seconds. This data structure
 //! represents a p2p message containing a data to verify such a lock.
 
-use consensus::{Decodable, Encodable, encode};
-use consensus::encode::MAX_VEC_SIZE;
-use ::{io, Txid};
-use core::fmt::{Debug, Formatter};
+use crate::io;
+
 #[cfg(all(not(feature = "std"), not(test)))]
 use alloc::vec::Vec;
+use core::fmt::{Debug, Formatter};
 #[cfg(any(feature = "std", test))]
 pub use std::vec::Vec;
-use blockdata::transaction::outpoint::OutPoint;
-//#[cfg(feature = "use-serde")]
-//use serde_big_array::BigArray;
-
-type BlsSignature = [u8; 96];
+use hashes::{Hash, HashEngine};
+use crate::hash_types::{CycleHash, QuorumSigningRequestId};
+use crate::{OutPoint, Txid, VarInt};
+use crate::bls_sig_utils::BLSSignature;
+use crate::consensus::{Encodable};
+use crate::internal_macros::impl_consensus_encoding;
 
-type CycleHash = [u8; 32];
+const IS_LOCK_REQUEST_ID_PREFIX: &str = "islock";
 
 #[derive(Clone, Eq, PartialEq)]
-// #[cfg_attr(feature = "use-serde", derive(Serialize, Deserialize))]
 /// Instant send lock is a mechanism used by the Dash network to
 /// confirm transaction within 1 or 2 seconds. This data structure
 /// represents a p2p message containing a data to verify such a lock.
@@ -33,20 +32,32 @@ pub struct InstantLock {
     /// Hash to figure out which quorum was used to sign this IS lock
     pub cyclehash: CycleHash,
     /// Quorum signature for this IS lock
-    //#[cfg_attr(feature = "use-serde", serde(serialize_with = "<[_]>::serialize"))]
-    //#[cfg_attr(feature = "use-serde", serde(with = "BigArray"))]
-    pub signature: BlsSignature,
+    pub signature: BLSSignature,
 }
 
-impl Default for InstantLock {
-    fn default() -> Self {
-        Self {
-            version: 1,
-            inputs: Default::default(),
-            txid: Default::default(),
-            cyclehash: Default::default(),
-            signature: [0; 96]
+impl_consensus_encoding!(InstantLock, version, inputs, txid, cyclehash, signature);
+
+impl InstantLock {
+    /// Returns quorum signing request ID
+    pub fn request_id(&self) -> Result<QuorumSigningRequestId, io::Error> {
+        let mut engine = QuorumSigningRequestId::engine();
+
+        // Prefix
+        let prefix_len = VarInt(IS_LOCK_REQUEST_ID_PREFIX.len() as u64);
+        prefix_len.consensus_encode(&mut engine)?;
+
+        engine.input(IS_LOCK_REQUEST_ID_PREFIX.as_bytes());
+
+        // Inputs
+        let inputs_len = VarInt(self.inputs.len() as u64);
+        inputs_len.consensus_encode(&mut engine)?;
+
+        for input in &self.inputs {
+            engine.input(&input.txid[..]);
+            engine.input(&input.vout.to_le_bytes());
         }
+
+        Ok(QuorumSigningRequestId::from_engine(engine))
     }
 }
 
@@ -57,43 +68,16 @@ impl Debug for InstantLock {
             .field("inputs", &format_args!("{:?}", self.inputs))
             .field("txid", &format_args!("{}", self.txid))
             .field("cyclehash", &format_args!("{:?}", self.cyclehash))
-            .field("signature", &format_args!("{:?}", self.signature.to_vec()))
+            .field("signature", &format_args!("{:?}", self.signature.as_bytes()))
             .finish()
     }
 }
 
-impl Decodable for InstantLock {
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Self, encode::Error> {
-        let mut d = d.take(MAX_VEC_SIZE as u64);
-        let version = u8::consensus_decode(&mut d)?;
-        let inputs = Vec::<OutPoint>::consensus_decode(&mut d)?;
-        let txid = Txid::consensus_decode(&mut d)?;
-        let cyclehash = <[u8; 32]>::consensus_decode(&mut d)?;
-        let signature = <[u8; 96]>::consensus_decode(&mut d)?;
-
-        Ok(Self {
-            version, inputs, txid, cyclehash, signature
-        })
-    }
-}
-
-impl Encodable for InstantLock {
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let mut len = 0;
-        len += self.version.consensus_encode(&mut s)?;
-        len += self.inputs.consensus_encode(&mut s)?;
-        len += self.txid.consensus_encode(&mut s)?;
-        len += self.cyclehash.consensus_encode(&mut s)?;
-        len += self.signature.consensus_encode(&mut s)?;
-        Ok(len)
-    }
-}
-
 #[cfg(test)]
-mod is_lock_test {
-    use hashes::hex::{FromHex, ToHex};
-    use consensus::{deserialize, serialize};
-    use ephemerealdata::instant_lock::InstantLock;
+mod tests {
+    use super::*;
+    use crate::consensus::{deserialize, serialize};
+    use crate::internal_macros::hex;
 
     #[test]
     pub fn should_decode_vec() {
@@ -110,26 +94,34 @@ mod is_lock_test {
         //     cyclehash: "7c30826123d0f29fe4c4a8895d7ba4eb469b1fafa6ad7b23896a1a591766a536",
         //     signature: "85e12d70ca7118c5034004f93e45384079f46c6c2928b45cfc5d3ad640e70dfd87a9a3069899adfb3b1622daeeead19809b74354272ccf95290678f55c13728e3c5ee8f8417fcce3dfdca2a7c9c33ec981abdff1ec35a2e4b558c3698f01c1b8"
         // };
-        let vec = Vec::from_hex(hex).unwrap();
+
+        let vec = hex!(hex);
 
         // let expected_hash = "4ee6a4ed2b6c70efd401c6c91dfaf6c61badd13f80ec07c281bb93d5270fcd58";
         // let expected_request_id = "495be44677e82895a9396fef02c6e9afc1f01d4aff70622b9f78e0e10d57064c";
-        
+
         let is_lock: InstantLock = deserialize(&vec).unwrap();
         assert_eq!(is_lock.version, 1);
-        
+
         // TODO: check outpoints
 
-        let mut cycle_clone = is_lock.cyclehash.clone();
-        cycle_clone.reverse();
-        assert_eq!(cycle_clone.to_hex(), "7c30826123d0f29fe4c4a8895d7ba4eb469b1fafa6ad7b23896a1a591766a536");
+        assert_eq!(is_lock.cyclehash.to_string(), "7c30826123d0f29fe4c4a8895d7ba4eb469b1fafa6ad7b23896a1a591766a536");
 
-        let mut signature_clone = is_lock.signature.clone();
-        signature_clone.reverse();
-        //assert_eq!(signature_clone.to_hex(), "85e12d70ca7118c5034004f93e45384079f46c6c2928b45cfc5d3ad640e70dfd87a9a3069899adfb3b1622daeeead19809b74354272ccf95290678f55c13728e3c5ee8f8417fcce3dfdca2a7c9c33ec981abdff1ec35a2e4b558c3698f01c1b8");
-        
-        let serialized = serialize(&is_lock).to_hex();
-        assert_eq!(serialized, hex);
+        let serialized = serialize(&is_lock);
+        assert_eq!(serialized, vec);
+    }
+
+    #[test]
+    pub fn should_create_request_id() {
+        let hex = "010101102862a43d122e6675aba4b507ae307af8e1e17febc77907e08b3efa28f41b000000004b446de00a592c67402c0a65649f4ad69f29084b3e9054f5aa6b85a50b497fe136a56617591a6a89237bada6af1f9b46eba47b5d89a8c4e49ff2d0236182307c85e12d70ca7118c5034004f93e45384079f46c6c2928b45cfc5d3ad640e70dfd87a9a3069899adfb3b1622daeeead19809b74354272ccf95290678f55c13728e3c5ee8f8417fcce3dfdca2a7c9c33ec981abdff1ec35a2e4b558c3698f01c1b8";
+        let vec = hex!(hex);
+
+        let expected_request_id = "495be44677e82895a9396fef02c6e9afc1f01d4aff70622b9f78e0e10d57064c";
+
+        let is_lock: InstantLock = deserialize(vec.as_slice()).unwrap();
+
+        let request_id = is_lock.request_id().expect("should return request id");
+        assert_eq!(request_id.to_string(), expected_request_id);
     }
 
     // #[test]
@@ -151,4 +143,4 @@ mod is_lock_test {
     //
     //     let is_lock: InstantLock = serde_json::from_str(str).unwrap();
     // }
-}
\ No newline at end of file
+}
diff --git a/src/ephemerealdata/mod.rs b/dash/src/ephemerealdata/mod.rs
similarity index 100%
rename from src/ephemerealdata/mod.rs
rename to dash/src/ephemerealdata/mod.rs
diff --git a/dash/src/error.rs b/dash/src/error.rs
new file mode 100644
index 000000000..3d3fb4c87
--- /dev/null
+++ b/dash/src/error.rs
@@ -0,0 +1,66 @@
+//! Contains error types and other error handling tools.
+
+use core::fmt;
+
+use internals::write_err;
+
+use crate::consensus::encode;
+pub use crate::parse::ParseIntError;
+
+/// A general error code, other errors should implement conversions to/from this
+/// if appropriate.
+#[derive(Debug)]
+#[non_exhaustive]
+pub enum Error {
+    /// Encoding error
+    Encode(encode::Error),
+    /// The header hash is not below the target
+    BlockBadProofOfWork,
+    /// The `target` field of a block header did not match the expected difficulty
+    BlockBadTarget,
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Error::Encode(ref e) => write_err!(f, "encoding error"; e),
+            Error::BlockBadProofOfWork => f.write_str("block target correct but not attained"),
+            Error::BlockBadTarget => f.write_str("block target incorrect"),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match self {
+            Encode(e) => Some(e),
+            BlockBadProofOfWork | BlockBadTarget => None,
+        }
+    }
+}
+
+#[doc(hidden)]
+impl From<encode::Error> for Error {
+    fn from(e: encode::Error) -> Error { Error::Encode(e) }
+}
+
+/// Impls std::error::Error for the specified type with appropriate attributes, possibly returning
+/// source.
+macro_rules! impl_std_error {
+    // No source available
+    ($type:ty) => {
+        #[cfg(feature = "std")]
+        impl std::error::Error for $type {}
+    };
+    // Struct with $field as source
+    ($type:ty, $field:ident) => {
+        #[cfg(feature = "std")]
+        impl std::error::Error for $type {
+            fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { Some(&self.$field) }
+        }
+    };
+}
+pub(crate) use impl_std_error;
diff --git a/dash/src/hash_types.rs b/dash/src/hash_types.rs
new file mode 100644
index 000000000..5727b2908
--- /dev/null
+++ b/dash/src/hash_types.rs
@@ -0,0 +1,213 @@
+// Rust Dash Library
+// Originally written in 2014 by
+//     Andrew Poelstra <apoelstra@wpsoftware.net>
+//     For Bitcoin
+// Updated for Dash in 2022 by
+//     The Dash Core Developers
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Dash hash types.
+//!
+//! This module defines types for hashes used throughout the library. These
+//! types are needed in order to avoid mixing data of the same hash format
+//! (e.g. `SHA256d`) but of different meaning (such as transaction id, block
+//! hash).
+//!
+
+
+#[rustfmt::skip]
+macro_rules! impl_hashencode {
+    ($hashtype:ident) => {
+        impl $crate::consensus::Encodable for $hashtype {
+            fn consensus_encode<W: $crate::io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, $crate::io::Error> {
+                self.0.consensus_encode(w)
+            }
+        }
+
+        impl $crate::consensus::Decodable for $hashtype {
+            fn consensus_decode<R: $crate::io::Read + ?Sized>(r: &mut R) -> Result<Self, $crate::consensus::encode::Error> {
+                use $crate::hashes::Hash;
+                Ok(Self::from_byte_array(<<$hashtype as $crate::hashes::Hash>::Bytes>::consensus_decode(r)?))
+            }
+        }
+    };
+}
+
+#[rustfmt::skip]
+macro_rules! impl_asref_push_bytes {
+    ($($hashtype:ident),*) => {
+        $(
+            impl AsRef<$crate::blockdata::script::PushBytes> for $hashtype {
+                fn as_ref(&self) -> &$crate::blockdata::script::PushBytes {
+                    use $crate::hashes::Hash;
+                    self.as_byte_array().into()
+                }
+            }
+
+            impl From<$hashtype> for $crate::blockdata::script::PushBytesBuf {
+                fn from(hash: $hashtype) -> Self {
+                    use $crate::hashes::Hash;
+                    hash.as_byte_array().into()
+                }
+            }
+        )*
+    };
+}
+
+// newtypes module is solely here so we can rustfmt::skip.
+pub use newtypes::*;
+
+#[rustfmt::skip]
+mod newtypes {
+
+    use crate::alloc::string::ToString;
+
+    use core::str::FromStr;
+    use hashes::{sha256, sha256d, hash160, hash_x11, hash_newtype, Hash};
+    use hashes::hex::Error;
+    use crate::prelude::String;
+
+    hash_newtype! {
+        /// A dash transaction hash/transaction ID.
+        pub struct Txid(sha256d::Hash);
+
+        /// A dash witness transaction ID.
+        pub struct Wtxid(sha256d::Hash);
+        /// A dash block hash.
+        pub struct BlockHash(hash_x11::Hash);
+
+        /// A hash of a public key.
+        pub struct PubkeyHash(hash160::Hash);
+        /// A hash of Dash Script bytecode.
+        pub struct ScriptHash(hash160::Hash);
+        /// SegWit version of a public key hash.
+        pub struct WPubkeyHash(hash160::Hash);
+        /// SegWit version of a Dash Script bytecode hash.
+        pub struct WScriptHash(sha256::Hash);
+
+        /// A hash of the Merkle tree branch or root for transactions
+        pub struct TxMerkleNode(sha256d::Hash);
+        /// A hash corresponding to the Merkle tree root for witness data
+        pub struct WitnessMerkleNode(sha256d::Hash);
+        /// A hash corresponding to the witness structure commitment in the coinbase transaction
+        pub struct WitnessCommitment(sha256d::Hash);
+        /// XpubIdentifier as defined in BIP-32.
+        pub struct XpubIdentifier(hash160::Hash);
+
+        /// Filter hash, as defined in BIP-157
+        pub struct FilterHash(sha256d::Hash);
+        /// Filter header, as defined in BIP-157
+        pub struct FilterHeader(sha256d::Hash);
+
+        /// Dash Additions
+        ///
+        /// The merkle root of the masternode list
+        pub struct MerkleRootMasternodeList(sha256d::Hash);
+        /// The merkle root of the quorums
+        pub struct MerkleRootQuorums(sha256d::Hash);
+        /// A special transaction payload hash
+        pub struct SpecialTransactionPayloadHash(sha256d::Hash);
+        /// A hash of all transaction inputs
+        pub struct InputsHash(sha256d::Hash);
+        /// A hash used to identify a quorum
+        #[hash_newtype(forward)]
+        pub struct QuorumHash(sha256d::Hash);
+        /// A hash of a quorum verification vector
+        pub struct QuorumVVecHash(sha256d::Hash);
+        /// A hash of a quorum signing request id
+        pub struct QuorumSigningRequestId(sha256d::Hash);
+        /// ProTxHash is a pro-tx hash
+        #[hash_newtype(forward)]
+        pub struct ProTxHash(sha256d::Hash);
+        /// CycleHash is a cycle hash
+        pub struct CycleHash(hash_x11::Hash);
+    }
+
+    impl_hashencode!(Txid);
+    impl_hashencode!(Wtxid);
+    impl_hashencode!(BlockHash);
+
+    impl_hashencode!(TxMerkleNode);
+    impl_hashencode!(WitnessMerkleNode);
+
+    impl_hashencode!(FilterHash);
+    impl_hashencode!(FilterHeader);
+
+    impl_hashencode!(MerkleRootMasternodeList);
+    impl_hashencode!(MerkleRootQuorums);
+
+    impl_hashencode!(SpecialTransactionPayloadHash);
+    impl_hashencode!(InputsHash);
+
+    impl_hashencode!(QuorumHash);
+    impl_hashencode!(QuorumVVecHash);
+    impl_hashencode!(QuorumSigningRequestId);
+    impl_hashencode!(PubkeyHash);
+    impl_hashencode!(CycleHash);
+
+    impl_asref_push_bytes!(PubkeyHash, ScriptHash, WPubkeyHash, WScriptHash);
+
+    impl Txid {
+        /// Create a Txid from a string
+        pub fn from_hex(s: &str) -> Result<Txid, Error> {
+            Ok(Self(sha256d::Hash::from_str(s)?))
+        }
+
+        /// Convert a Txid to a string
+        pub fn to_hex(&self) -> String {
+            self.0.to_string()
+        }
+    }
+
+    impl ProTxHash {
+        /// Create a Txid from a string
+        pub fn from_hex(s: &str) -> Result<ProTxHash, Error> {
+            Ok(Self(sha256d::Hash::from_str(s)?))
+        }
+
+        /// Convert a Txid to a string
+        pub fn to_hex(&self) -> String {
+            self.0.to_string()
+        }
+    }
+
+    impl InputsHash {
+        /// Create an InputsHash from a string
+        pub fn from_hex(s: &str) -> Result<InputsHash, Error> {
+            Ok(Self(sha256d::Hash::from_str(s)?))
+        }
+
+        /// Convert an InputsHash to a string
+        pub fn to_hex(&self) -> String {
+            self.0.to_string()
+        }
+    }
+
+    impl SpecialTransactionPayloadHash {
+        /// Create a SpecialTransactionPayloadHash from a string
+        pub fn to_hex(&self) -> String {
+            self.0.to_string()
+        }
+    }
+
+    impl PubkeyHash {
+        /// Create a PubkeyHash from a string
+        pub fn from_hex(s: &str) -> Result<PubkeyHash, Error> {
+            Ok(Self(hash160::Hash::from_str(s)?))
+        }
+
+        /// Convert a PubkeyHash to a string
+        pub fn to_hex(&self) -> String {
+            self.0.to_string()
+        }
+    }
+}
diff --git a/dash/src/internal_macros.rs b/dash/src/internal_macros.rs
new file mode 100644
index 000000000..c48893f83
--- /dev/null
+++ b/dash/src/internal_macros.rs
@@ -0,0 +1,213 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+//! Internal macros.
+//!
+//! Macros meant to be used inside the Rust Bitcoin library.
+//!
+
+macro_rules! impl_consensus_encoding {
+    ($thing:ident, $($field:ident),+) => (
+        impl $crate::consensus::Encodable for $thing {
+            #[inline]
+            fn consensus_encode<R: $crate::io::Write + ?Sized>(
+                &self,
+                r: &mut R,
+            ) -> Result<usize, $crate::io::Error> {
+                let mut len = 0;
+                $(len += self.$field.consensus_encode(r)?;)+
+                Ok(len)
+            }
+        }
+
+        impl $crate::consensus::Decodable for $thing {
+
+            #[inline]
+            fn consensus_decode_from_finite_reader<R: $crate::io::Read + ?Sized>(
+                r: &mut R,
+            ) -> Result<$thing, $crate::consensus::encode::Error> {
+                Ok($thing {
+                    $($field: $crate::consensus::Decodable::consensus_decode_from_finite_reader(r)?),+
+                })
+            }
+
+            #[inline]
+            fn consensus_decode<R: $crate::io::Read + ?Sized>(
+                r: &mut R,
+            ) -> Result<$thing, $crate::consensus::encode::Error> {
+                use crate::io::Read as _;
+                let mut r = r.take($crate::consensus::encode::MAX_VEC_SIZE as u64);
+                Ok($thing {
+                    $($field: $crate::consensus::Decodable::consensus_decode(r.by_ref())?),+
+                })
+            }
+        }
+    );
+}
+pub(crate) use impl_consensus_encoding;
+// We use test_macros module to keep things organised, re-export everything for ease of use.
+#[cfg(test)]
+pub(crate) use test_macros::*;
+
+#[cfg(test)]
+mod test_macros {
+
+    macro_rules! hex (($hex:expr) => (<Vec<u8> as hashes::hex::FromHex>::from_hex($hex).unwrap()));
+    pub(crate) use hex;
+}
+
+/// Implements several traits for byte-based newtypes.
+/// Implements:
+/// - core::fmt::LowerHex
+/// - core::fmt::UpperHex
+/// - core::fmt::Display
+/// - core::str::FromStr
+/// - hashes::hex::FromHex
+macro_rules! impl_bytes_newtype {
+    ($t:ident, $len:literal) => {
+        impl $t {
+            /// Returns a reference the underlying bytes.
+            #[inline]
+            pub fn as_bytes(&self) -> &[u8; $len] { &self.0 }
+
+            /// Returns the underlying bytes.
+            #[inline]
+            pub fn to_bytes(self) -> [u8; $len] {
+                // We rely on `Copy` being implemented for $t so conversion
+                // methods use the correct Rust naming conventions.
+                fn check_copy<T: Copy>() {}
+                check_copy::<$t>();
+
+                self.0
+            }
+        }
+
+        impl core::fmt::LowerHex for $t {
+            fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                use internals::hex::{display, Case};
+                display::fmt_hex_exact!(f, $len, &self.0, Case::Lower)
+            }
+        }
+
+        impl core::fmt::UpperHex for $t {
+            fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                use internals::hex::{display, Case};
+                display::fmt_hex_exact!(f, $len, &self.0, Case::Upper)
+            }
+        }
+
+        impl core::fmt::Display for $t {
+            fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                core::fmt::LowerHex::fmt(self, f)
+            }
+        }
+
+        impl core::fmt::Debug for $t {
+            fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                core::fmt::LowerHex::fmt(self, f)
+            }
+        }
+
+        impl $crate::hashes::hex::FromHex for $t {
+            fn from_byte_iter<I>(iter: I) -> Result<Self, $crate::hashes::hex::Error>
+            where
+                I: core::iter::Iterator<Item = Result<u8, $crate::hashes::hex::Error>>
+                    + core::iter::ExactSizeIterator
+                    + core::iter::DoubleEndedIterator,
+            {
+                if iter.len() == $len {
+                    let mut ret = [0; $len];
+                    for (n, byte) in iter.enumerate() {
+                        ret[n] = byte?;
+                    }
+                    Ok($t(ret))
+                } else {
+                    Err($crate::hashes::hex::Error::InvalidLength(2 * $len, 2 * iter.len()))
+                }
+            }
+        }
+
+        impl core::str::FromStr for $t {
+            type Err = $crate::hashes::hex::Error;
+            fn from_str(s: &str) -> Result<Self, Self::Err> {
+                $crate::hashes::hex::FromHex::from_hex(s)
+            }
+        }
+
+        #[cfg(feature = "serde")]
+        impl $crate::serde::Serialize for $t {
+            fn serialize<S: $crate::serde::Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
+                if s.is_human_readable() {
+                    s.collect_str(self)
+                } else {
+                    s.serialize_bytes(&self[..])
+                }
+            }
+        }
+
+        #[cfg(feature = "serde")]
+        impl<'de> $crate::serde::Deserialize<'de> for $t {
+            fn deserialize<D: $crate::serde::Deserializer<'de>>(d: D) -> Result<$t, D::Error> {
+                if d.is_human_readable() {
+                    struct HexVisitor;
+
+                    impl<'de> $crate::serde::de::Visitor<'de> for HexVisitor {
+                        type Value = $t;
+
+                        fn expecting(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                            f.write_str("an ASCII hex string")
+                        }
+
+                        fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
+                        where
+                            E: $crate::serde::de::Error,
+                        {
+                            use $crate::serde::de::Unexpected;
+
+                            if let Ok(hex) = core::str::from_utf8(v) {
+                                $crate::hashes::hex::FromHex::from_hex(hex).map_err(E::custom)
+                            } else {
+                                return Err(E::invalid_value(Unexpected::Bytes(v), &self));
+                            }
+                        }
+
+                        fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+                        where
+                            E: $crate::serde::de::Error,
+                        {
+                            $crate::hashes::hex::FromHex::from_hex(v).map_err(E::custom)
+                        }
+                    }
+
+                    d.deserialize_str(HexVisitor)
+                } else {
+                    struct BytesVisitor;
+
+                    impl<'de> $crate::serde::de::Visitor<'de> for BytesVisitor {
+                        type Value = $t;
+
+                        fn expecting(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                            f.write_str("a bytestring")
+                        }
+
+                        fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
+                        where
+                            E: $crate::serde::de::Error,
+                        {
+                            if v.len() != $len {
+                                Err(E::invalid_length(v.len(), &stringify!($len)))
+                            } else {
+                                let mut ret = [0; $len];
+                                ret.copy_from_slice(v);
+                                Ok($t(ret))
+                            }
+                        }
+                    }
+
+                    d.deserialize_bytes(BytesVisitor)
+                }
+            }
+        }
+    };
+}
+pub(crate) use impl_bytes_newtype;
diff --git a/dash/src/lib.rs b/dash/src/lib.rs
new file mode 100644
index 000000000..5e646d971
--- /dev/null
+++ b/dash/src/lib.rs
@@ -0,0 +1,222 @@
+// Rust Dash Library
+// Originally written in 2014 by
+//     Andrew Poelstra <apoelstra@wpsoftware.net>
+//     For Bitcoin
+// Updated for Dash in 2022 by
+//     The Dash Core Developers
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! # Rust Dash Library
+//!
+//! This is a library that supports the Dash network protocol and associated
+//! primitives. It is designed for Rust programs built to work with the Bitcoin
+//! network.
+//!
+//! It is also written entirely in Rust to illustrate the benefits of strong type
+//! safety, including ownership and lifetime, for financial and/or cryptographic
+//! software.
+//!
+//! See README.md for detailed documentation about development and supported
+//! environments.
+//!
+//! ## Available feature flags
+//!
+//! * `std` - the usual dependency on `std` (default).
+//! * `secp-recovery` - enables calculating public key from a signature and message.
+//! * `signer` - enables singing and validation ECDSA helpers.
+//! * `base64` - (dependency), enables encoding of PSBTs and message signatures.
+//! * `unstable` - enables unstable features for testing.
+//! * `rand` - (dependency), makes it more convenient to generate random values.
+//! * `bincode` - (dependency), implements bincode serialization and deserialization.
+//! * `serde` - (dependency), implements `serde`-based serialization and deserialization.
+//! * `secp-lowmemory` - optimizations for low-memory devices.
+//! * `no-std` - enables additional features required for this crate to be usable
+//!              without std. Does **not** disable `std`. Depends on `core2`.
+//!
+
+#![cfg_attr(all(not(feature = "std"), not(test)), no_std)]
+// Experimental features we need.
+#![cfg_attr(bench, feature(test))]
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+// Coding conventions
+#![warn(missing_docs)]
+// Instead of littering the codebase for non-fuzzing code just globally allow.
+#![cfg_attr(fuzzing, allow(dead_code, unused_imports))]
+
+#[cfg(not(any(feature = "std", feature = "no-std")))]
+compile_error!("at least one of the `std` or `no-std` features must be enabled");
+
+// Disable 16-bit support at least for now as we can't guarantee it yet.
+#[cfg(target_pointer_width = "16")]
+compile_error!(
+    "rust-dash currently only supports architectures with pointers wider than 16 bits, let us
+    know if you want 16-bit support. Note that we do NOT guarantee that we will implement it!"
+);
+
+#[cfg(bench)]
+extern crate test;
+
+#[macro_use]
+extern crate alloc;
+
+#[cfg(feature = "base64")]
+pub extern crate base64;
+pub extern crate bech32;
+#[cfg(feature = "bitcoinconsensus")]
+pub extern crate bitcoinconsensus;
+pub extern crate dashcore_hashes as hashes;
+pub extern crate secp256k1;
+
+#[cfg(feature = "serde")]
+#[macro_use]
+extern crate actual_serde as serde;
+extern crate core;
+
+#[cfg(test)]
+#[macro_use]
+mod test_macros;
+mod internal_macros;
+mod parse;
+#[cfg(feature = "serde")]
+mod serde_utils;
+
+#[macro_use]
+pub mod network;
+pub mod address;
+pub mod amount;
+pub mod base58;
+pub mod bip152;
+pub mod bip158;
+pub mod bip32;
+pub mod blockdata;
+pub mod consensus;
+// Private until we either make this a crate or flatten it - still to be decided.
+pub(crate) mod crypto;
+pub mod error;
+pub mod hash_types;
+pub mod merkle_tree;
+pub mod policy;
+pub mod pow;
+pub mod psbt;
+pub mod sign_message;
+pub mod string;
+pub mod taproot;
+pub mod util;
+pub mod bls_sig_utils;
+mod signer;
+mod ephemerealdata;
+
+// May depend on crate features and we don't want to bother with it
+#[allow(unused)]
+#[cfg(feature = "std")]
+use std::error::Error as StdError;
+#[cfg(feature = "std")]
+use std::io;
+
+#[allow(unused)]
+#[cfg(not(feature = "std"))]
+use core2::error::Error as StdError;
+#[cfg(not(feature = "std"))]
+use core2::io;
+
+pub use crate::address::{Address, AddressType};
+pub use crate::amount::{Amount, Denomination, SignedAmount};
+pub use crate::blockdata::block::{self, Block};
+pub use crate::blockdata::fee_rate::FeeRate;
+pub use crate::blockdata::locktime::{self, absolute, relative};
+pub use crate::blockdata::script::{self, Script, ScriptBuf};
+pub use crate::blockdata::transaction::{self, Transaction, hash_type::EcdsaSighashType};
+pub use crate::transaction::{txin::TxIn, txout::TxOut, outpoint::OutPoint};
+pub use crate::blockdata::weight::Weight;
+pub use crate::blockdata::witness::{self, Witness};
+pub use crate::blockdata::{constants, opcodes};
+pub use crate::consensus::encode::VarInt;
+pub use crate::crypto::key::{self, PrivateKey, PublicKey};
+pub use crate::crypto::{ecdsa, sighash};
+pub use crate::error::Error;
+pub use crate::hash_types::{
+    BlockHash, PubkeyHash, ScriptHash, Txid, WPubkeyHash, WScriptHash, Wtxid, ProTxHash, QuorumHash,
+    TxMerkleNode, FilterHash
+};
+pub use crate::merkle_tree::MerkleBlock;
+pub use crate::network::constants::Network;
+pub use crate::pow::{CompactTarget, Target, Work};
+
+#[cfg(not(feature = "std"))]
+mod io_extras {
+    /// A writer which will move data into the void.
+    pub struct Sink {
+        _priv: (),
+    }
+
+    /// Creates an instance of a writer which will successfully consume all data.
+    pub const fn sink() -> Sink { Sink { _priv: () } }
+
+    impl core2::io::Write for Sink {
+        #[inline]
+        fn write(&mut self, buf: &[u8]) -> core2::io::Result<usize> { Ok(buf.len()) }
+
+        #[inline]
+        fn flush(&mut self) -> core2::io::Result<()> { Ok(()) }
+    }
+}
+
+#[rustfmt::skip]
+mod prelude {
+    #[cfg(all(not(feature = "std"), not(test)))]
+    pub use alloc::{string::{String, ToString}, vec::Vec, boxed::Box, borrow::{Borrow, Cow, ToOwned}, slice, rc};
+
+    #[cfg(all(not(feature = "std"), not(test), any(not(rust_v_1_60), target_has_atomic = "ptr")))]
+    pub use alloc::sync;
+
+    #[cfg(any(feature = "std", test))]
+    pub use std::{string::{String, ToString}, vec::Vec, boxed::Box, borrow::{Borrow, Cow, ToOwned}, slice, rc, sync};
+
+    #[cfg(all(not(feature = "std"), not(test)))]
+    pub use alloc::collections::{BTreeMap, BTreeSet, btree_map, BinaryHeap};
+
+    #[cfg(any(feature = "std", test))]
+    pub use std::collections::{BTreeMap, BTreeSet, btree_map, BinaryHeap};
+
+    #[cfg(feature = "std")]
+    pub use std::io::sink;
+
+    #[cfg(not(feature = "std"))]
+    pub use crate::io_extras::sink;
+
+    pub use internals::hex::display::DisplayHex;
+}
+
+#[cfg(bench)]
+use bench::EmptyWrite;
+
+#[cfg(bench)]
+mod bench {
+    use core::fmt::Arguments;
+
+    use crate::io::{IoSlice, Result, Write};
+
+    #[derive(Default, Clone, Debug, PartialEq, Eq)]
+    pub struct EmptyWrite;
+
+    impl Write for EmptyWrite {
+        fn write(&mut self, buf: &[u8]) -> Result<usize> { Ok(buf.len()) }
+        fn write_vectored(&mut self, bufs: &[IoSlice]) -> Result<usize> {
+            Ok(bufs.iter().map(|s| s.len()).sum())
+        }
+        fn flush(&mut self) -> Result<()> { Ok(()) }
+
+        fn write_all(&mut self, _: &[u8]) -> Result<()> { Ok(()) }
+        fn write_fmt(&mut self, _: Arguments) -> Result<()> { Ok(()) }
+    }
+}
+
diff --git a/src/util/merkleblock.rs b/dash/src/merkle_tree/block.rs
similarity index 54%
rename from src/util/merkleblock.rs
rename to dash/src/merkle_tree/block.rs
index ed3db8959..df5f51396 100644
--- a/src/util/merkleblock.rs
+++ b/dash/src/merkle_tree/block.rs
@@ -1,23 +1,11 @@
-// Rust Dash Library
-// Written by
-//   John L. Jegutanis
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
+// Written by John L. Jegutanis
+// SPDX-License-Identifier: CC0-1.0
 //
 // This code was translated from merkleblock.h, merkleblock.cpp and pmt_tests.cpp
 // Copyright (c) 2009-2010 Satoshi Nakamoto
 // Copyright (c) 2009-2018 The Bitcoin Core developers
-// Copyright (c) 2022-2022 The Dash Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// Copyright (c) 2022-2023 The Dash Core developers
+// SPDX-License-Identifier: MIT
 
 //! Merkle Block and Partial Merkle Tree.
 //!
@@ -30,9 +18,9 @@
 //! use dashcore::hashes::hex::FromHex;
 //! use dashcore::{Block, MerkleBlock};
 //!
-//! // Get the proof from a dashd by running in the terminal:
+//! // Get the proof from a dashcored by running in the terminal:
 //! // $ TXID="5a4ebf66822b0b2d56bd9dc64ece0bc38ee7844a23ff1d7320a88c5fdb2ad3e2"
-//! // $ dash-cli gettxoutproof [\"$TXID\"]
+//! // $ dashcore-cli gettxoutproof [\"$TXID\"]
 //! let mb_bytes = Vec::from_hex("01000000ba8b9cda965dd8e536670f9ddec10e53aab14b20bacad27b913719\
 //!     0000000000190760b278fe7b8565fda3b968b918d5fd997f993b23674c0af3b6fde300b38f33a5914ce6ed5b\
 //!     1b01e32f570200000002252bf9d75c4f481ebb6278d708257d1f12beb6dd30301d26c623f789b2ba6fc0e2d3\
@@ -45,38 +33,133 @@
 //! assert!(mb.extract_matches(&mut matches, &mut index).is_ok());
 //! assert_eq!(1, matches.len());
 //! assert_eq!(
-//!     Txid::from_hex(
-//!         "5a4ebf66822b0b2d56bd9dc64ece0bc38ee7844a23ff1d7320a88c5fdb2ad3e2").unwrap(),
+//!     "5a4ebf66822b0b2d56bd9dc64ece0bc38ee7844a23ff1d7320a88c5fdb2ad3e2".parse::<Txid>().unwrap(),
 //!     matches[0]
 //! );
 //! assert_eq!(1, index.len());
 //! assert_eq!(1, index[0]);
 //! ```
 
-use prelude::*;
-
-use io;
+use core::fmt;
 
 use hashes::Hash;
-use hash_types::{Txid, TxMerkleNode};
 
-use blockdata::transaction::Transaction;
-use blockdata::constants::{MAX_BLOCK_WEIGHT, MIN_TRANSACTION_WEIGHT};
-use consensus::encode::{self, Decodable, Encodable};
-use util::merkleblock::MerkleBlockError::*;
-use {Block, BlockHeader};
+use self::MerkleBlockError::*;
+use crate::blockdata::block::{self, Block};
+use crate::blockdata::constants::{MAX_BLOCK_WEIGHT, MIN_TRANSACTION_WEIGHT};
+use crate::blockdata::transaction::Transaction;
+use crate::consensus::encode::{self, Decodable, Encodable};
+use crate::hash_types::{TxMerkleNode, Txid};
+use crate::io;
+use crate::prelude::*;
 
-/// An error when verifying the merkle block
-#[derive(Clone, PartialEq, Eq, Debug)]
-pub enum MerkleBlockError {
-    /// When header merkle root don't match to the root calculated from the partial merkle tree
-    MerkleRootMismatch,
-    /// When partial merkle tree contains no transactions
-    NoTransactions,
-    /// When there are too many transactions
-    TooManyTransactions,
-    /// General format error
-    BadFormat(String),
+/// Data structure that represents a block header paired to a partial merkle tree.
+///
+/// NOTE: This assumes that the given Block has *at least* 1 transaction. If the Block has 0 txs,
+/// it will hit an assertion.
+#[derive(PartialEq, Eq, Clone, Debug)]
+pub struct MerkleBlock {
+    /// The block header
+    pub header: block::Header,
+    /// Transactions making up a partial merkle tree
+    pub txn: PartialMerkleTree,
+}
+
+impl MerkleBlock {
+    /// Create a MerkleBlock from a block, that contains proofs for specific txids.
+    ///
+    /// The `block` is a full block containing the header and transactions and `match_txids` is a
+    /// function that returns true for the ids that should be included in the partial merkle tree.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// use dashcore::hash_types::Txid;
+    /// use dashcore::hashes::hex::FromHex;
+    /// use dashcore::{Block, MerkleBlock};
+    ///
+    /// // Block 80000
+    /// let block_bytes = Vec::from_hex("01000000ba8b9cda965dd8e536670f9ddec10e53aab14b20bacad2\
+    ///     7b9137190000000000190760b278fe7b8565fda3b968b918d5fd997f993b23674c0af3b6fde300b38f33\
+    ///     a5914ce6ed5b1b01e32f5702010000000100000000000000000000000000000000000000000000000000\
+    ///     00000000000000ffffffff0704e6ed5b1b014effffffff0100f2052a01000000434104b68a50eaa0287e\
+    ///     ff855189f949c1c6e5f58b37c88231373d8a59809cbae83059cc6469d65c665ccfd1cfeb75c6e8e19413\
+    ///     bba7fbff9bc762419a76d87b16086eac000000000100000001a6b97044d03da79c005b20ea9c0e1a6d9d\
+    ///     c12d9f7b91a5911c9030a439eed8f5000000004948304502206e21798a42fae0e854281abd38bacd1aee\
+    ///     d3ee3738d9e1446618c4571d1090db022100e2ac980643b0b82c0e88ffdfec6b64e3e6ba35e7ba5fdd7d\
+    ///     5d6cc8d25c6b241501ffffffff0100f2052a010000001976a914404371705fa9bd789a2fcd52d2c580b6\
+    ///     5d35549d88ac00000000").unwrap();
+    /// let block: Block = dashcore::consensus::deserialize(&block_bytes).unwrap();
+    ///
+    /// // Create a merkle block containing a single transaction
+    /// let txid = "5a4ebf66822b0b2d56bd9dc64ece0bc38ee7844a23ff1d7320a88c5fdb2ad3e2".parse::<Txid>().unwrap();
+    /// let match_txids: Vec<Txid> = vec![txid].into_iter().collect();
+    /// let mb = MerkleBlock::from_block_with_predicate(&block, |t| match_txids.contains(t));
+    ///
+    /// // Authenticate and extract matched transaction ids
+    /// let mut matches: Vec<Txid> = vec![];
+    /// let mut index: Vec<u32> = vec![];
+    /// assert!(mb.extract_matches(&mut matches, &mut index).is_ok());
+    /// assert_eq!(txid, matches[0]);
+    /// ```
+    pub fn from_block_with_predicate<F>(block: &Block, match_txids: F) -> Self
+    where
+        F: Fn(&Txid) -> bool,
+    {
+        let block_txids: Vec<_> = block.txdata.iter().map(Transaction::txid).collect();
+        Self::from_header_txids_with_predicate(&block.header, &block_txids, match_txids)
+    }
+
+    /// Create a MerkleBlock from the block's header and txids, that contain proofs for specific txids.
+    ///
+    /// The `header` is the block header, `block_txids` is the full list of txids included in the block and
+    /// `match_txids` is a function that returns true for the ids that should be included in the partial merkle tree.
+    pub fn from_header_txids_with_predicate<F>(
+        header: &block::Header,
+        block_txids: &[Txid],
+        match_txids: F,
+    ) -> Self
+    where
+        F: Fn(&Txid) -> bool,
+    {
+        let matches: Vec<bool> = block_txids.iter().map(match_txids).collect();
+
+        let pmt = PartialMerkleTree::from_txids(block_txids, &matches);
+        MerkleBlock { header: *header, txn: pmt }
+    }
+
+    /// Extract the matching txid's represented by this partial merkle tree
+    /// and their respective indices within the partial tree.
+    /// returns Ok(()) on success, or error in case of failure
+    pub fn extract_matches(
+        &self,
+        matches: &mut Vec<Txid>,
+        indexes: &mut Vec<u32>,
+    ) -> Result<(), MerkleBlockError> {
+        let merkle_root = self.txn.extract_matches(matches, indexes)?;
+
+        if merkle_root.eq(&self.header.merkle_root) {
+            Ok(())
+        } else {
+            Err(MerkleRootMismatch)
+        }
+    }
+}
+
+impl Encodable for MerkleBlock {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let len = self.header.consensus_encode(w)? + self.txn.consensus_encode(w)?;
+        Ok(len)
+    }
+}
+
+impl Decodable for MerkleBlock {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        Ok(MerkleBlock {
+            header: Decodable::consensus_decode(r)?,
+            txn: Decodable::consensus_decode(r)?,
+        })
+    }
 }
 
 /// Data structure that represents a partial merkle tree.
@@ -123,6 +206,15 @@ pub struct PartialMerkleTree {
 }
 
 impl PartialMerkleTree {
+    /// Returns the total number of transactions in the block.
+    pub fn num_transactions(&self) -> u32 { self.num_transactions }
+
+    /// Returns the node-is-parent-of-matched-txid bits of the partial merkle tree.
+    pub fn bits(&self) -> &Vec<bool> { &self.bits }
+
+    /// Returns the transaction ids and internal hashes of the partial merkle tree.
+    pub fn hashes(&self) -> &Vec<TxMerkleNode> { &self.hashes }
+
     /// Construct a partial merkle tree
     /// The `txids` are the transaction hashes of the block and the `matches` is the contains flags
     /// wherever a tx hash should be included in the proof.
@@ -134,7 +226,7 @@ impl PartialMerkleTree {
     /// ```rust
     /// use dashcore::hash_types::Txid;
     /// use dashcore::hashes::hex::FromHex;
-    /// use dashcore::util::merkleblock::PartialMerkleTree;
+    /// use dashcore::merkle_tree::{MerkleBlock, PartialMerkleTree};
     ///
     /// // Block 80000
     /// let txids: Vec<Txid> = [
@@ -142,7 +234,7 @@ impl PartialMerkleTree {
     ///     "5a4ebf66822b0b2d56bd9dc64ece0bc38ee7844a23ff1d7320a88c5fdb2ad3e2",
     /// ]
     /// .iter()
-    /// .map(|hex| Txid::from_hex(hex).unwrap())
+    /// .map(|hex| hex.parse::<Txid>().unwrap())
     /// .collect();
     ///
     /// // Select the second transaction
@@ -190,11 +282,11 @@ impl PartialMerkleTree {
         }
         // there can never be more hashes provided than one for every txid
         if self.hashes.len() as u32 > self.num_transactions {
-            return Err(BadFormat("Proof contains more hashes than transactions".to_owned()));
+            return Err(TooManyHashes);
         };
         // there must be at least one bit per node in the partial tree, and at least one node per hash
         if self.bits.len() < self.hashes.len() {
-            return Err(BadFormat("Proof contains less bits than hashes".to_owned()));
+            return Err(NotEnoughBits);
         };
         // calculate height of tree
         let mut height = 0;
@@ -209,13 +301,13 @@ impl PartialMerkleTree {
         // Verify that all bits were consumed (except for the padding caused by
         // serializing it as a byte sequence)
         if (bits_used + 7) / 8 != (self.bits.len() as u32 + 7) / 8 {
-            return Err(BadFormat("Not all bit were consumed".to_owned()));
+            return Err(NotAllBitsConsumed);
         }
         // Verify that all hashes were consumed
         if hash_used != self.hashes.len() as u32 {
-            return Err(BadFormat("Not all hashes were consumed".to_owned()));
+            return Err(NotAllHashesConsumed);
         }
-        Ok(TxMerkleNode::from_inner(hash_merkle_root.into_inner()))
+        Ok(TxMerkleNode::from_byte_array(hash_merkle_root.to_byte_array()))
     }
 
     /// Helper function to efficiently calculate the number of nodes at given height
@@ -229,7 +321,7 @@ impl PartialMerkleTree {
     fn calc_hash(&self, height: u32, pos: u32, txids: &[Txid]) -> TxMerkleNode {
         if height == 0 {
             // Hash at height 0 is the txid itself
-            TxMerkleNode::from_inner(txids[pos as usize].into_inner())
+            TxMerkleNode::from_byte_array(txids[pos as usize].to_byte_array())
         } else {
             // Calculate left hash
             let left = self.calc_hash(height - 1, pos * 2, txids);
@@ -281,20 +373,20 @@ impl PartialMerkleTree {
         indexes: &mut Vec<u32>,
     ) -> Result<TxMerkleNode, MerkleBlockError> {
         if *bits_used as usize >= self.bits.len() {
-            return Err(BadFormat("Overflowed the bits array".to_owned()));
+            return Err(BitsArrayOverflow);
         }
         let parent_of_match = self.bits[*bits_used as usize];
         *bits_used += 1;
         if height == 0 || !parent_of_match {
             // If at height 0, or nothing interesting below, use stored hash and do not descend
             if *hash_used as usize >= self.hashes.len() {
-                return Err(BadFormat("Overflowed the hash array".to_owned()));
+                return Err(HashesArrayOverflow);
             }
             let hash = self.hashes[*hash_used as usize];
             *hash_used += 1;
             if height == 0 && parent_of_match {
                 // in case of height 0, we have a matched txid
-                matches.push(Txid::from_inner(hash.into_inner()));
+                matches.push(Txid::from_byte_array(hash.to_byte_array()));
                 indexes.push(pos);
             }
             Ok(hash)
@@ -321,7 +413,7 @@ impl PartialMerkleTree {
                 if right == left {
                     // The left and right branches should never be identical, as the transaction
                     // hashes covered by them must each be unique.
-                    return Err(BadFormat("Found identical transaction hashes".to_owned()));
+                    return Err(IdenticalHashesFound);
                 }
             } else {
                 right = left;
@@ -341,262 +433,210 @@ impl PartialMerkleTree {
 }
 
 impl Encodable for PartialMerkleTree {
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let ret = self.num_transactions.consensus_encode(&mut s)?
-            + self.hashes.consensus_encode(&mut s)?;
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let ret = self.num_transactions.consensus_encode(w)? + self.hashes.consensus_encode(w)?;
         let mut bytes: Vec<u8> = vec![0; (self.bits.len() + 7) / 8];
         for p in 0..self.bits.len() {
             bytes[p / 8] |= (self.bits[p] as u8) << (p % 8) as u8;
         }
-        Ok(ret + bytes.consensus_encode(s)?)
+        Ok(ret + bytes.consensus_encode(w)?)
     }
 }
 
 impl Decodable for PartialMerkleTree {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let num_transactions: u32 = Decodable::consensus_decode(&mut d)?;
-        let hashes: Vec<TxMerkleNode> = Decodable::consensus_decode(&mut d)?;
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let num_transactions: u32 = Decodable::consensus_decode(r)?;
+        let hashes: Vec<TxMerkleNode> = Decodable::consensus_decode(r)?;
 
-        let bytes: Vec<u8> = Decodable::consensus_decode(d)?;
+        let bytes: Vec<u8> = Decodable::consensus_decode(r)?;
         let mut bits: Vec<bool> = vec![false; bytes.len() * 8];
 
         for (p, bit) in bits.iter_mut().enumerate() {
             *bit = (bytes[p / 8] & (1 << (p % 8) as u8)) != 0;
         }
-        Ok(PartialMerkleTree {
-            num_transactions,
-            hashes,
-            bits,
-        })
+        Ok(PartialMerkleTree { num_transactions, hashes, bits })
     }
 }
 
-/// Data structure that represents a block header paired to a partial merkle tree.
-///
-/// NOTE: This assumes that the given Block has *at least* 1 transaction. If the Block has 0 txs,
-/// it will hit an assertion.
-#[derive(PartialEq, Eq, Clone, Debug)]
-pub struct MerkleBlock {
-    /// The block header
-    pub header: BlockHeader,
-    /// Transactions making up a partial merkle tree
-    pub txn: PartialMerkleTree,
+/// An error when verifying the merkle block.
+#[derive(Clone, PartialEq, Eq, Debug)]
+#[non_exhaustive]
+pub enum MerkleBlockError {
+    /// Merkle root in the header doesn't match to the root calculated from partial merkle tree.
+    MerkleRootMismatch,
+    /// Partial merkle tree contains no transactions.
+    NoTransactions,
+    /// There are too many transactions.
+    TooManyTransactions,
+    /// There are too many hashes
+    TooManyHashes,
+    /// There must be at least one bit per node in the partial tree,
+    /// and at least one node per hash
+    NotEnoughBits,
+    /// Not all bits were consumed
+    NotAllBitsConsumed,
+    /// Not all hashes were consumed
+    NotAllHashesConsumed,
+    /// Overflowed the bits array
+    BitsArrayOverflow,
+    /// Overflowed the hashes array
+    HashesArrayOverflow,
+    /// The left and right branches should never be identical
+    IdenticalHashesFound,
 }
 
-impl MerkleBlock {
-    /// Create a MerkleBlock from a block, that contains proofs for specific txids.
-    ///
-    /// The `block` is a full block containing the header and transactions and `match_txids` is a
-    /// function that returns true for the ids that should be included in the partial merkle tree.
-    ///
-    /// # Examples
-    ///
-    /// ```rust
-    /// use dashcore::hash_types::Txid;
-    /// use dashcore::hashes::hex::FromHex;
-    /// use dashcore::{Block, MerkleBlock};
-    ///
-    /// // Block 80000
-    /// let block_bytes = Vec::from_hex("01000000ba8b9cda965dd8e536670f9ddec10e53aab14b20bacad2\
-    ///     7b9137190000000000190760b278fe7b8565fda3b968b918d5fd997f993b23674c0af3b6fde300b38f33\
-    ///     a5914ce6ed5b1b01e32f5702010000000100000000000000000000000000000000000000000000000000\
-    ///     00000000000000ffffffff0704e6ed5b1b014effffffff0100f2052a01000000434104b68a50eaa0287e\
-    ///     ff855189f949c1c6e5f58b37c88231373d8a59809cbae83059cc6469d65c665ccfd1cfeb75c6e8e19413\
-    ///     bba7fbff9bc762419a76d87b16086eac000000000100000001a6b97044d03da79c005b20ea9c0e1a6d9d\
-    ///     c12d9f7b91a5911c9030a439eed8f5000000004948304502206e21798a42fae0e854281abd38bacd1aee\
-    ///     d3ee3738d9e1446618c4571d1090db022100e2ac980643b0b82c0e88ffdfec6b64e3e6ba35e7ba5fdd7d\
-    ///     5d6cc8d25c6b241501ffffffff0100f2052a010000001976a914404371705fa9bd789a2fcd52d2c580b6\
-    ///     5d35549d88ac00000000").unwrap();
-    /// let block: Block = dashcore::consensus::deserialize(&block_bytes).unwrap();
-    ///
-    /// // Create a merkle block containing a single transaction
-    /// let txid = Txid::from_hex(
-    ///     "5a4ebf66822b0b2d56bd9dc64ece0bc38ee7844a23ff1d7320a88c5fdb2ad3e2").unwrap();
-    /// let match_txids: Vec<Txid> = vec![txid].into_iter().collect();
-    /// let mb = MerkleBlock::from_block_with_predicate(&block, |t| match_txids.contains(t));
-    ///
-    /// // Authenticate and extract matched transaction ids
-    /// let mut matches: Vec<Txid> = vec![];
-    /// let mut index: Vec<u32> = vec![];
-    /// assert!(mb.extract_matches(&mut matches, &mut index).is_ok());
-    /// assert_eq!(txid, matches[0]);
-    /// ```
-    pub fn from_block_with_predicate<F>(block: &Block, match_txids: F) -> Self
-    where
-        F: Fn(&Txid) -> bool
-    {
-        let block_txids: Vec<_> = block.txdata.iter().map(Transaction::txid).collect();
-        Self::from_header_txids_with_predicate(&block.header, &block_txids, match_txids)
-    }
-
-    /// Create a MerkleBlock from a block, that contains proofs for specific txids.
-    #[cfg(feature = "std")]
-    #[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-    #[deprecated(since = "0.26.2", note = "use from_block_with_predicate")]
-    pub fn from_block(block: &Block, match_txids: &::std::collections::HashSet<Txid>) -> Self {
-        Self::from_block_with_predicate(block, |t| match_txids.contains(t))
-    }
-
-    /// Create a MerkleBlock from the block's header and txids, that contain proofs for specific txids.
-    ///
-    /// The `header` is the block header, `block_txids` is the full list of txids included in the block and
-    /// `match_txids` is a function that returns true for the ids that should be included in the partial merkle tree.
-    pub fn from_header_txids_with_predicate<F>(
-        header: &BlockHeader,
-        block_txids: &[Txid],
-        match_txids: F,
-    ) -> Self
-    where
-        F: Fn(&Txid) -> bool
-    {
-        let matches: Vec<bool> = block_txids
-            .iter()
-            .map(match_txids)
-            .collect();
-
-        let pmt = PartialMerkleTree::from_txids(block_txids, &matches);
-        MerkleBlock {
-            header: *header,
-            txn: pmt,
-        }
-    }
-
-    /// Create a MerkleBlock from the block's header and txids, that should contain proofs for match_txids.
-    #[cfg(feature = "std")]
-    #[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-    #[deprecated(since = "0.26.2", note = "use from_header_txids_with_predicate")]
-    pub fn from_header_txids(
-        header: &BlockHeader,
-        block_txids: &[Txid],
-        match_txids: &::std::collections::HashSet<Txid>,
-    ) -> Self {
-        Self::from_header_txids_with_predicate(header, block_txids, |t| match_txids.contains(t))
-    }
-
-    /// Extract the matching txid's represented by this partial merkle tree
-    /// and their respective indices within the partial tree.
-    /// returns Ok(()) on success, or error in case of failure
-    pub fn extract_matches(
-        &self,
-        matches: &mut Vec<Txid>,
-        indexes: &mut Vec<u32>,
-    ) -> Result<(), MerkleBlockError> {
-        let merkle_root = self.txn.extract_matches(matches, indexes)?;
-
-        if merkle_root.eq(&self.header.merkle_root) {
-            Ok(())
-        } else {
-            Err(MerkleRootMismatch)
+impl fmt::Display for MerkleBlockError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use self::MerkleBlockError::*;
+
+        match *self {
+            MerkleRootMismatch => write!(f, "merkle header root doesn't match to the root calculated from the partial merkle tree"),
+            NoTransactions => write!(f, "partial merkle tree contains no transactions"),
+            TooManyTransactions => write!(f, "too many transactions"),
+            TooManyHashes => write!(f, "proof contains more hashes than transactions"),
+            NotEnoughBits => write!(f, "proof contains less bits than hashes"),
+            NotAllBitsConsumed => write!(f, "not all bit were consumed"),
+            NotAllHashesConsumed => write!(f, "not all hashes were consumed"),
+            BitsArrayOverflow => write!(f, "overflowed the bits array"),
+            HashesArrayOverflow => write!(f, "overflowed the hashes array"),
+            IdenticalHashesFound => write!(f, "found identical transaction hashes"),
         }
     }
 }
 
-impl Encodable for MerkleBlock {
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let len = self.header.consensus_encode(&mut s)?
-            + self.txn.consensus_encode(s)?;
-        Ok(len)
-    }
-}
+#[cfg(feature = "std")]
+impl std::error::Error for MerkleBlockError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::MerkleBlockError::*;
 
-impl Decodable for MerkleBlock {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        Ok(MerkleBlock {
-            header: Decodable::consensus_decode(&mut d)?,
-            txn: Decodable::consensus_decode(d)?,
-        })
+        match *self {
+            MerkleRootMismatch | NoTransactions | TooManyTransactions | TooManyHashes
+            | NotEnoughBits | NotAllBitsConsumed | NotAllHashesConsumed | BitsArrayOverflow
+            | HashesArrayOverflow | IdenticalHashesFound => None,
+        }
     }
 }
 
 #[cfg(test)]
 mod tests {
-    use core::cmp::min;
-
+    #[cfg(feature = "rand-std")]
     use hashes::Hash;
-    use hashes::hex::{FromHex, ToHex};
-    use hash_types::{Txid, TxMerkleNode};
+    #[cfg(feature = "rand-std")]
     use secp256k1::rand::prelude::*;
 
-    use consensus::encode::{deserialize, serialize};
-    use util::hash::dash_merkle_root;
-    use util::merkleblock::{MerkleBlock, PartialMerkleTree};
-    use Block;
+    use super::*;
+    use crate::consensus::encode::{deserialize, serialize};
+    #[cfg(feature = "rand-std")]
+    use crate::hash_types::TxMerkleNode;
+    use crate::internal_macros::hex;
+    use crate::{Block, Txid};
+
+    #[cfg(feature = "rand-std")]
+    macro_rules! pmt_tests {
+        ($($name:ident),* $(,)?) => {
+            $(
+                #[test]
+                fn $name() {
+                    pmt_test_from_name(stringify!($name));
+                }
+            )*
+        }
+    }
+
+    #[cfg(feature = "rand-std")]
+    pmt_tests!(
+        pmt_test_1,
+        pmt_test_4,
+        pmt_test_7,
+        pmt_test_17,
+        pmt_test_56,
+        pmt_test_100,
+        pmt_test_127,
+        pmt_test_256,
+        pmt_test_312,
+        pmt_test_513,
+        pmt_test_1000,
+        pmt_test_4095
+    );
+
+    /// Parses the transaction count out of `name` with form: `pmt_test_$num`.
+    #[cfg(feature = "rand-std")]
+    fn pmt_test_from_name(name: &str) { pmt_test(name[9..].parse().unwrap()) }
+
+    #[cfg(feature = "rand-std")]
+    fn pmt_test(tx_count: usize) {
+        use core::cmp::min;
+
+        use crate::merkle_tree;
 
-    #[test]
-    fn pmt_tests() {
         let mut rng = thread_rng();
-        let tx_counts = vec![1, 4, 7, 17, 56, 100, 127, 256, 312, 513, 1000, 4095];
-
-        for num_tx in tx_counts {
-            // Create some fake tx ids
-            let txids = (1..num_tx + 1) // change to `1..=num_tx` when min Rust >= 1.26.0
-                .map(|i| Txid::from_hex(&format!("{:064x}", i)).unwrap())
-                .collect::<Vec<_>>();
-
-            // Calculate the merkle root and height
-            let hashes = txids.iter().map(|t| t.as_hash());
-            let merkle_root_1: TxMerkleNode = dash_merkle_root(hashes).expect("hashes is not empty").into();
-            let mut height = 1;
-            let mut ntx = num_tx;
-            while ntx > 1 {
-                ntx = (ntx + 1) / 2;
-                height += 1;
-            }
+        // Create some fake tx ids
+        let tx_ids = (1..=tx_count)
+            .map(|i| format!("{:064x}", i).parse::<Txid>().unwrap())
+            .collect::<Vec<_>>();
+
+        // Calculate the merkle root and height
+        let hashes = tx_ids.iter().map(|t| t.to_raw_hash());
+        let merkle_root_1: TxMerkleNode =
+            merkle_tree::calculate_root(hashes).expect("hashes is not empty").into();
+        let mut height = 1;
+        let mut ntx = tx_count;
+        while ntx > 1 {
+            ntx = (ntx + 1) / 2;
+            height += 1;
+        }
 
-            // Check with random subsets with inclusion chances 1, 1/2, 1/4, ..., 1/128
-            for att in 1..15 {
-                let mut matches = vec![false; num_tx];
-                let mut match_txid1 = vec![];
-                for j in 0..num_tx {
-                    // Generate `att / 2` random bits
-                    let rand_bits = match att / 2 {
-                        0 => 0,
-                        bits => rng.gen::<u64>() >> (64 - bits),
-                    };
-                    let include = rand_bits == 0;
-                    matches[j] = include;
-
-                    if include {
-                        match_txid1.push(txids[j]);
-                    };
-                }
+        // Check with random subsets with inclusion chances 1, 1/2, 1/4, ..., 1/128
+        for att in 1..15 {
+            let mut matches = vec![false; tx_count];
+            let mut match_txid1 = vec![];
+            for j in 0..tx_count {
+                // Generate `att / 2` random bits
+                let rand_bits = match att / 2 {
+                    0 => 0,
+                    bits => rng.gen::<u64>() >> (64 - bits),
+                };
+                let include = rand_bits == 0;
+                matches[j] = include;
+
+                if include {
+                    match_txid1.push(tx_ids[j]);
+                };
+            }
 
-                // Build the partial merkle tree
-                let pmt1 = PartialMerkleTree::from_txids(&txids, &matches);
-                let serialized = serialize(&pmt1);
-
-                // Verify PartialMerkleTree's size guarantees
-                let n = min(num_tx, 1 + match_txid1.len() * height);
-                assert!(serialized.len() <= 10 + (258 * n + 7) / 8);
-
-                // Deserialize into a tester copy
-                let pmt2: PartialMerkleTree =
-                    deserialize(&serialized).expect("Could not deserialize own data");
-
-                // Extract merkle root and matched txids from copy
-                let mut match_txid2: Vec<Txid> = vec![];
-                let mut indexes = vec![];
-                let merkle_root_2 = pmt2
-                    .extract_matches(&mut match_txid2, &mut indexes)
-                    .expect("Could not extract matches");
-
-                // Check that it has the same merkle root as the original, and a valid one
-                assert_eq!(merkle_root_1, merkle_root_2);
-                assert_ne!(merkle_root_2, TxMerkleNode::default());
-
-                // check that it contains the matched transactions (in the same order!)
-                assert_eq!(match_txid1, match_txid2);
-
-                // check that random bit flips break the authentication
-                for _ in 0..4 {
-                    let mut pmt3: PartialMerkleTree = deserialize(&serialized).unwrap();
-                    pmt3.damage(&mut rng);
-                    let mut match_txid3 = vec![];
-                    let merkle_root_3 = pmt3
-                        .extract_matches(&mut match_txid3, &mut indexes)
-                        .unwrap();
-                    assert_ne!(merkle_root_3, merkle_root_1);
-                }
+            // Build the partial merkle tree
+            let pmt1 = PartialMerkleTree::from_txids(&tx_ids, &matches);
+            let serialized = serialize(&pmt1);
+
+            // Verify PartialMerkleTree's size guarantees
+            let n = min(tx_count, 1 + match_txid1.len() * height);
+            assert!(serialized.len() <= 10 + (258 * n + 7) / 8);
+
+            // Deserialize into a tester copy
+            let pmt2: PartialMerkleTree =
+                deserialize(&serialized).expect("Could not deserialize own data");
+
+            // Extract merkle root and matched txids from copy
+            let mut match_txid2: Vec<Txid> = vec![];
+            let mut indexes = vec![];
+            let merkle_root_2 = pmt2
+                .extract_matches(&mut match_txid2, &mut indexes)
+                .expect("Could not extract matches");
+
+            // Check that it has the same merkle root as the original, and a valid one
+            assert_eq!(merkle_root_1, merkle_root_2);
+            assert_ne!(merkle_root_2, TxMerkleNode::all_zeros());
+
+            // check that it contains the matched transactions (in the same order!)
+            assert_eq!(match_txid1, match_txid2);
+
+            // check that random bit flips break the authentication
+            for _ in 0..4 {
+                let mut pmt3: PartialMerkleTree = deserialize(&serialized).unwrap();
+                pmt3.damage(&mut rng);
+                let mut match_txid3 = vec![];
+                let merkle_root_3 = pmt3.extract_matches(&mut match_txid3, &mut indexes).unwrap();
+                assert_ne!(merkle_root_3, merkle_root_1);
             }
         }
     }
@@ -606,12 +646,11 @@ mod tests {
         // Create some fake tx ids with the last 2 hashes repeating
         let txids: Vec<Txid> = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9, 10]
             .iter()
-            .map(|i| Txid::from_hex(&format!("{:064x}", i)).unwrap())
+            .map(|i| format!("{:064x}", i).parse::<Txid>().unwrap())
             .collect();
 
-        let matches = vec![
-            false, false, false, false, false, false, false, false, false, true, true, false,
-        ];
+        let matches =
+            vec![false, false, false, false, false, false, false, false, false, true, true, false];
 
         let tree = PartialMerkleTree::from_txids(&txids, &matches);
         // Should fail due to duplicate txs found
@@ -623,22 +662,16 @@ mod tests {
     fn merkleblock_serialization() {
         // Got it by running the rpc call
         // `gettxoutproof '["220ebc64e21abece964927322cba69180ed853bb187fbc6923bac7d010b9d87a"]'`
-        let mb_hex =
-            "0100000090f0a9f110702f808219ebea1173056042a714bad51b916cb6800000000000005275289558f51c\
-            9966699404ae2294730c3c9f9bda53523ce50e9b95e558da2fdb261b4d4c86041b1ab1bf930900000005fac\
-            7708a6e81b2a986dea60db2663840ed141130848162eb1bd1dee54f309a1b2ee1e12587e497ada70d9bd10d\
-            31e83f0a924825b96cb8d04e8936d793fb60db7ad8b910d0c7ba2369bc7f18bb53d80e1869ba2c32274996c\
-            ebe1ae264bc0e2289189ff0316cdc10511da71da757e553cada9f3b5b1434f3923673adb57d83caac392c38\
-            af156d6fc30b55fad4112df2b95531e68114e9ad10011e72f7b7cfdb025700";
-
-        let mb: MerkleBlock = deserialize(&Vec::from_hex(mb_hex).unwrap()).unwrap();
+        let mb_hex = include_str!("../../tests/data/merkle_block.hex");
+
+        let mb: MerkleBlock = deserialize(&hex!(mb_hex)).unwrap();
         assert_eq!(get_block_13b8a().block_hash(), mb.header.block_hash());
         assert_eq!(
             mb.header.merkle_root,
             mb.txn.extract_matches(&mut vec![], &mut vec![]).unwrap()
         );
         // Serialize again and check that it matches the original bytes
-        assert_eq!(mb_hex, serialize(&mb).to_hex().as_str());
+        assert_eq!(mb_hex, serialize(&mb).to_lower_hex_string().as_str());
     }
 
     /// Create a CMerkleBlock using a list of txids which will be found in the
@@ -652,7 +685,7 @@ mod tests {
             "f9fc751cb7dc372406a9f8d738d5e6f8f63bab71986a39cf36ee70ee17036d07",
         ]
         .iter()
-        .map(|hex| Txid::from_hex(hex).unwrap())
+        .map(|hex| hex.parse::<Txid>().unwrap())
         .collect();
 
         let txid1 = txids[0];
@@ -667,10 +700,7 @@ mod tests {
         let mut index: Vec<u32> = vec![];
 
         assert_eq!(
-            merkle_block
-                .txn
-                .extract_matches(&mut matches, &mut index)
-                .unwrap(),
+            merkle_block.txn.extract_matches(&mut matches, &mut index).unwrap(),
             block.header.merkle_root
         );
         assert_eq!(matches.len(), 2);
@@ -689,7 +719,7 @@ mod tests {
         let block = get_block_13b8a();
         let txids: Vec<Txid> = ["c0ffee00003bafa802c8aa084379aa98d9fcd632ddc2ed9782b586ec87451f20"]
             .iter()
-            .map(|hex| Txid::from_hex(hex).unwrap())
+            .map(|hex| hex.parse::<Txid>().unwrap())
             .collect();
 
         let merkle_block = MerkleBlock::from_block_with_predicate(&block, |t| txids.contains(t));
@@ -700,23 +730,21 @@ mod tests {
         let mut index: Vec<u32> = vec![];
 
         assert_eq!(
-            merkle_block
-                .txn
-                .extract_matches(&mut matches, &mut index)
-                .unwrap(),
+            merkle_block.txn.extract_matches(&mut matches, &mut index).unwrap(),
             block.header.merkle_root
         );
         assert_eq!(matches.len(), 0);
         assert_eq!(index.len(), 0);
     }
 
+    #[cfg(feature = "rand-std")]
     impl PartialMerkleTree {
         /// Flip one bit in one of the hashes - this should break the authentication
         fn damage(&mut self, rng: &mut ThreadRng) {
             let n = rng.gen_range(0..self.hashes.len());
             let bit = rng.gen::<u8>();
             let hashes = &mut self.hashes;
-            let mut hash = hashes[n].into_inner();
+            let mut hash = hashes[n].to_byte_array();
             hash[(bit >> 3) as usize] ^= 1 << (bit & 7);
             hashes[n] = TxMerkleNode::from_slice(&hash).unwrap();
         }
@@ -725,78 +753,8 @@ mod tests {
     /// Returns a real block (0000000000013b8ab2cd513b0261a14096412195a72a0c4827d229dcc7e0f7af)
     /// with 9 txs.
     fn get_block_13b8a() -> Block {
-        let block_hex =
-            "0100000090f0a9f110702f808219ebea1173056042a714bad51b916cb6800000000000005275289558f51c\
-            9966699404ae2294730c3c9f9bda53523ce50e9b95e558da2fdb261b4d4c86041b1ab1bf930901000000010\
-            000000000000000000000000000000000000000000000000000000000000000ffffffff07044c86041b0146\
-            ffffffff0100f2052a01000000434104e18f7afbe4721580e81e8414fc8c24d7cfacf254bb5c7b949450c3e\
-            997c2dc1242487a8169507b631eb3771f2b425483fb13102c4eb5d858eef260fe70fbfae0ac000000000100\
-            00000196608ccbafa16abada902780da4dc35dafd7af05fa0da08cf833575f8cf9e836000000004a4930460\
-            22100dab24889213caf43ae6adc41cf1c9396c08240c199f5225acf45416330fd7dbd022100fe37900e0644\
-            bf574493a07fc5edba06dbc07c311b947520c2d514bc5725dcb401ffffffff0100f2052a010000001976a91\
-            4f15d1921f52e4007b146dfa60f369ed2fc393ce288ac000000000100000001fb766c1288458c2bafcfec81\
-            e48b24d98ec706de6b8af7c4e3c29419bfacb56d000000008c493046022100f268ba165ce0ad2e6d93f089c\
-            fcd3785de5c963bb5ea6b8c1b23f1ce3e517b9f022100da7c0f21adc6c401887f2bfd1922f11d76159cbc59\
-            7fbd756a23dcbb00f4d7290141042b4e8625a96127826915a5b109852636ad0da753c9e1d5606a50480cd0c\
-            40f1f8b8d898235e571fe9357d9ec842bc4bba1827daaf4de06d71844d0057707966affffffff0280969800\
-            000000001976a9146963907531db72d0ed1a0cfb471ccb63923446f388ac80d6e34c000000001976a914f06\
-            88ba1c0d1ce182c7af6741e02658c7d4dfcd388ac000000000100000002c40297f730dd7b5a99567eb8d27b\
-            78758f607507c52292d02d4031895b52f2ff010000008b483045022100f7edfd4b0aac404e5bab4fd3889e0\
-            c6c41aa8d0e6fa122316f68eddd0a65013902205b09cc8b2d56e1cd1f7f2fafd60a129ed94504c4ac7bdc67\
-            b56fe67512658b3e014104732012cb962afa90d31b25d8fb0e32c94e513ab7a17805c14ca4c3423e18b4fb5\
-            d0e676841733cb83abaf975845c9f6f2a8097b7d04f4908b18368d6fc2d68ecffffffffca5065ff9617cbcb\
-            a45eb23726df6498a9b9cafed4f54cbab9d227b0035ddefb000000008a473044022068010362a13c7f9919f\
-            a832b2dee4e788f61f6f5d344a7c2a0da6ae740605658022006d1af525b9a14a35c003b78b72bd59738cd67\
-            6f845d1ff3fc25049e01003614014104732012cb962afa90d31b25d8fb0e32c94e513ab7a17805c14ca4c34\
-            23e18b4fb5d0e676841733cb83abaf975845c9f6f2a8097b7d04f4908b18368d6fc2d68ecffffffff01001e\
-            c4110200000043410469ab4181eceb28985b9b4e895c13fa5e68d85761b7eee311db5addef76fa862186513\
-            4a221bd01f28ec9999ee3e021e60766e9d1f3458c115fb28650605f11c9ac000000000100000001cdaf2f75\
-            8e91c514655e2dc50633d1e4c84989f8aa90a0dbc883f0d23ed5c2fa010000008b48304502207ab51be6f12\
-            a1962ba0aaaf24a20e0b69b27a94fac5adf45aa7d2d18ffd9236102210086ae728b370e5329eead9accd880\
-            d0cb070aea0c96255fae6c4f1ddcce1fd56e014104462e76fd4067b3a0aa42070082dcb0bf2f388b6495cf3\
-            3d789904f07d0f55c40fbd4b82963c69b3dc31895d0c772c812b1d5fbcade15312ef1c0e8ebbb12dcd4ffff\
-            ffff02404b4c00000000001976a9142b6ba7c9d796b75eef7942fc9288edd37c32f5c388ac002d310100000\
-            0001976a9141befba0cdc1ad56529371864d9f6cb042faa06b588ac000000000100000001b4a47603e71b61\
-            bc3326efd90111bf02d2f549b067f4c4a8fa183b57a0f800cb010000008a4730440220177c37f9a505c3f1a\
-            1f0ce2da777c339bd8339ffa02c7cb41f0a5804f473c9230220585b25a2ee80eb59292e52b987dad92acb0c\
-            64eced92ed9ee105ad153cdb12d001410443bd44f683467e549dae7d20d1d79cbdb6df985c6e9c029c8d0c6\
-            cb46cc1a4d3cf7923c5021b27f7a0b562ada113bc85d5fda5a1b41e87fe6e8802817cf69996ffffffff0280\
-            651406000000001976a9145505614859643ab7b547cd7f1f5e7e2a12322d3788ac00aa0271000000001976a\
-            914ea4720a7a52fc166c55ff2298e07baf70ae67e1b88ac00000000010000000586c62cd602d219bb60edb1\
-            4a3e204de0705176f9022fe49a538054fb14abb49e010000008c493046022100f2bc2aba2534becbdf062eb\
-            993853a42bbbc282083d0daf9b4b585bd401aa8c9022100b1d7fd7ee0b95600db8535bbf331b19eed8d961f\
-            7a8e54159c53675d5f69df8c014104462e76fd4067b3a0aa42070082dcb0bf2f388b6495cf33d789904f07d\
-            0f55c40fbd4b82963c69b3dc31895d0c772c812b1d5fbcade15312ef1c0e8ebbb12dcd4ffffffff03ad0e58\
-            ccdac3df9dc28a218bcf6f1997b0a93306faaa4b3a28ae83447b2179010000008b483045022100be12b2937\
-            179da88599e27bb31c3525097a07cdb52422d165b3ca2f2020ffcf702200971b51f853a53d644ebae9ec8f3\
-            512e442b1bcb6c315a5b491d119d10624c83014104462e76fd4067b3a0aa42070082dcb0bf2f388b6495cf3\
-            3d789904f07d0f55c40fbd4b82963c69b3dc31895d0c772c812b1d5fbcade15312ef1c0e8ebbb12dcd4ffff\
-            ffff2acfcab629bbc8685792603762c921580030ba144af553d271716a95089e107b010000008b483045022\
-            100fa579a840ac258871365dd48cd7552f96c8eea69bd00d84f05b283a0dab311e102207e3c0ee9234814cf\
-            bb1b659b83671618f45abc1326b9edcc77d552a4f2a805c0014104462e76fd4067b3a0aa42070082dcb0bf2\
-            f388b6495cf33d789904f07d0f55c40fbd4b82963c69b3dc31895d0c772c812b1d5fbcade15312ef1c0e8eb\
-            bb12dcd4ffffffffdcdc6023bbc9944a658ddc588e61eacb737ddf0a3cd24f113b5a8634c517fcd20000000\
-            08b4830450221008d6df731df5d32267954bd7d2dda2302b74c6c2a6aa5c0ca64ecbabc1af03c75022010e5\
-            5c571d65da7701ae2da1956c442df81bbf076cdbac25133f99d98a9ed34c014104462e76fd4067b3a0aa420\
-            70082dcb0bf2f388b6495cf33d789904f07d0f55c40fbd4b82963c69b3dc31895d0c772c812b1d5fbcade15\
-            312ef1c0e8ebbb12dcd4ffffffffe15557cd5ce258f479dfd6dc6514edf6d7ed5b21fcfa4a038fd69f06b83\
-            ac76e010000008b483045022023b3e0ab071eb11de2eb1cc3a67261b866f86bf6867d4558165f7c8c8aca2d\
-            86022100dc6e1f53a91de3efe8f63512850811f26284b62f850c70ca73ed5de8771fb451014104462e76fd4\
-            067b3a0aa42070082dcb0bf2f388b6495cf33d789904f07d0f55c40fbd4b82963c69b3dc31895d0c772c812\
-            b1d5fbcade15312ef1c0e8ebbb12dcd4ffffffff01404b4c00000000001976a9142b6ba7c9d796b75eef794\
-            2fc9288edd37c32f5c388ac00000000010000000166d7577163c932b4f9690ca6a80b6e4eb001f0a2fa9023\
-            df5595602aae96ed8d000000008a4730440220262b42546302dfb654a229cefc86432b89628ff259dc87edd\
-            1154535b16a67e102207b4634c020a97c3e7bbd0d4d19da6aa2269ad9dded4026e896b213d73ca4b63f0141\
-            04979b82d02226b3a4597523845754d44f13639e3bf2df5e82c6aab2bdc79687368b01b1ab8b19875ae3c90\
-            d661a3d0a33161dab29934edeb36aa01976be3baf8affffffff02404b4c00000000001976a9144854e695a0\
-            2af0aeacb823ccbc272134561e0a1688ac40420f00000000001976a914abee93376d6b37b5c2940655a6fca\
-            f1c8e74237988ac0000000001000000014e3f8ef2e91349a9059cb4f01e54ab2597c1387161d3da89919f7e\
-            a6acdbb371010000008c49304602210081f3183471a5ca22307c0800226f3ef9c353069e0773ac76bb58065\
-            4d56aa523022100d4c56465bdc069060846f4fbf2f6b20520b2a80b08b168b31e66ddb9c694e24001410497\
-            6c79848e18251612f8940875b2b08d06e6dc73b9840e8860c066b7e87432c477e9a59a453e71e6d76d5fe34\
-            058b800a098fc1740ce3012e8fc8a00c96af966ffffffff02c0e1e400000000001976a9144134e75a6fcb60\
-            42034aab5e18570cf1f844f54788ac404b4c00000000001976a9142b6ba7c9d796b75eef7942fc9288edd37\
-            c32f5c388ac00000000";
+        use hashes::hex::FromHex;
+        let block_hex = include_str!("../../tests/data/block_13b8a.hex");
         deserialize(&Vec::from_hex(block_hex).unwrap()).unwrap()
     }
 }
diff --git a/src/util/hash.rs b/dash/src/merkle_tree/mod.rs
similarity index 72%
rename from src/util/hash.rs
rename to dash/src/merkle_tree/mod.rs
index 27915797b..e2cb6841b 100644
--- a/src/util/hash.rs
+++ b/dash/src/merkle_tree/mod.rs
@@ -15,34 +15,45 @@
 // If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
 //
 
-//! Dash hash functions.
+//! Bitcoin merkle tree functions.
 //!
-//! This module provides utility functions related to hashing data, including
-//! merkleization.
+//! # Examples
 //!
+//! ```
+//! # use dashcore::{merkle_tree, Txid};
+//! # use dashcore::hashes::Hash;
+//! # let tx1 = Txid::all_zeros();  // Dummy hash values.
+//! # let tx2 = Txid::all_zeros();
+//! let tx_hashes = vec![tx1, tx2]; // All the hashes we wish to merkelize.
+//! let root = merkle_tree::calculate_root(tx_hashes.into_iter());
+//! ```
 
-use core::iter;
-
-use prelude::*;
+mod block;
 
-use io;
 use core::cmp::min;
+use core::iter;
 
+pub use block::{MerkleBlock, MerkleBlockError, PartialMerkleTree};
 use hashes::Hash;
-use consensus::encode::Encodable;
+
+use crate::consensus::encode::Encodable;
+use crate::io;
+use crate::prelude::*;
 
 /// Calculates the merkle root of a list of *hashes*, inline (in place) in `hashes`.
 ///
-/// In most cases, you'll want to use [dash_merkle_root] instead.
+/// In most cases, you'll want to use [`calculate_root`] instead. Please note, calling this function
+/// trashes the data in `hashes` (i.e. the `hashes` is left in an undefined state at conclusion of
+/// this method and should not be used again afterwards).
 ///
 /// # Returns
 /// - `None` if `hashes` is empty. The merkle root of an empty tree of hashes is undefined.
 /// - `Some(hash)` if `hashes` contains one element. A single hash is by definition the merkle root.
 /// - `Some(merkle_root)` if length of `hashes` is greater than one.
-pub fn dash_merkle_root_inline<T>(hashes: &mut [T]) -> Option<T>
+pub fn calculate_root_inline<T>(hashes: &mut [T]) -> Option<T>
 where
     T: Hash + Encodable,
-          <T as Hash>::Engine: io::Write,
+    <T as Hash>::Engine: io::Write,
 {
     match hashes.len() {
         0 => None,
@@ -57,11 +68,11 @@ where
 /// - `None` if `hashes` is empty. The merkle root of an empty tree of hashes is undefined.
 /// - `Some(hash)` if `hashes` contains one element. A single hash is by definition the merkle root.
 /// - `Some(merkle_root)` if length of `hashes` is greater than one.
-pub fn dash_merkle_root<T, I>(mut hashes: I) -> Option<T>
+pub fn calculate_root<T, I>(mut hashes: I) -> Option<T>
 where
     T: Hash + Encodable,
     <T as Hash>::Engine: io::Write,
-    I: Iterator<Item=T>,
+    I: Iterator<Item = T>,
 {
     let first = hashes.next()?;
     let second = match hashes.next() {
@@ -95,7 +106,7 @@ where
     <T as Hash>::Engine: io::Write,
 {
     if hashes.len() == 1 {
-        return hashes[0]
+        return hashes[0];
     }
 
     for idx in 0..((hashes.len() + 1) / 2) {
@@ -113,28 +124,28 @@ where
 
 #[cfg(test)]
 mod tests {
-    use consensus::encode::deserialize;
-    use hashes::sha256d;
+    use hashes::{sha256d};
 
-    use blockdata::block::Block;
     use super::*;
+    use crate::blockdata::block::Block;
+    use crate::consensus::encode::deserialize;
 
     #[test]
     fn both_merkle_root_functions_return_the_same_result() {
         // testnet block 000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b
-        let segwit_block = include_bytes!("../../test_data/testnet_block_000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b.raw");
+        let segwit_block = include_bytes!("../../tests/data/testnet_block_000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b.raw");
         let block: Block = deserialize(&segwit_block[..]).expect("Failed to deserialize block");
         assert!(block.check_merkle_root()); // Sanity check.
 
-        let hashes_iter = block.txdata.iter().map(|obj| obj.txid().as_hash());
+        let hashes_iter = block.txdata.iter().map(|obj| obj.txid().to_raw_hash());
 
-        let mut hashes_array: [sha256d::Hash; 15] = [Default::default(); 15];
+        let mut hashes_array: [sha256d::Hash; 15] = [Hash::all_zeros(); 15];
         for (i, hash) in hashes_iter.clone().enumerate() {
             hashes_array[i] = hash;
         }
 
-        let from_iter = dash_merkle_root(hashes_iter);
-        let from_array = dash_merkle_root_inline(&mut hashes_array);
+        let from_iter = calculate_root(hashes_iter);
+        let from_array = calculate_root_inline(&mut hashes_array);
         assert_eq!(from_iter, from_array);
     }
 }
diff --git a/src/network/address.rs b/dash/src/network/address.rs
similarity index 51%
rename from src/network/address.rs
rename to dash/src/network/address.rs
index 5d8875401..bb3bfa8cc 100644
--- a/src/network/address.rs
+++ b/dash/src/network/address.rs
@@ -15,20 +15,19 @@
 // If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
 //
 
-//! Bitcoin network addresses.
+//! Dash network addresses.
 //!
 //! This module defines the structures and functions needed to encode
 //! network addresses in Bitcoin messages.
 //!
 
-use prelude::*;
-
 use core::{fmt, iter};
-use std::net::{SocketAddr, Ipv6Addr, SocketAddrV4, SocketAddrV6, Ipv4Addr, ToSocketAddrs};
+use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6, ToSocketAddrs};
 
-use io;
-use network::constants::ServiceFlags;
-use consensus::encode::{self, Decodable, Encodable, VarInt, ReadExt, WriteExt};
+use crate::consensus::encode::{self, Decodable, Encodable, ReadExt, VarInt, WriteExt};
+use crate::io;
+use crate::network::constants::ServiceFlags;
+use crate::prelude::*;
 
 /// A message which can be sent on the Bitcoin network
 #[derive(Clone, PartialEq, Eq, Hash)]
@@ -38,17 +37,17 @@ pub struct Address {
     /// Network byte-order ipv6 address, or ipv4-mapped ipv6 address
     pub address: [u16; 8],
     /// Network port
-    pub port: u16
+    pub port: u16,
 }
 
 const ONION: [u16; 3] = [0xFD87, 0xD87E, 0xEB43];
 
 impl Address {
     /// Create an address message for a socket
-    pub fn new(socket :&SocketAddr, services: ServiceFlags) -> Address {
+    pub fn new(socket: &SocketAddr, services: ServiceFlags) -> Address {
         let (address, port) = match *socket {
             SocketAddr::V4(addr) => (addr.ip().to_ipv6_mapped().segments(), addr.port()),
-            SocketAddr::V6(addr) => (addr.ip().segments(), addr.port())
+            SocketAddr::V6(addr) => (addr.ip().segments(), addr.port()),
         };
         Address { address, port, services }
     }
@@ -61,7 +60,8 @@ impl Address {
         if addr[0..3] == ONION {
             return Err(io::Error::from(io::ErrorKind::AddrNotAvailable));
         }
-        let ipv6 = Ipv6Addr::new(addr[0], addr[1], addr[2], addr[3], addr[4], addr[5], addr[6], addr[7]);
+        let ipv6 =
+            Ipv6Addr::new(addr[0], addr[1], addr[2], addr[3], addr[4], addr[5], addr[6], addr[7]);
         if let Some(ipv4) = ipv6.to_ipv4() {
             Ok(SocketAddr::V4(SocketAddrV4::new(ipv4, self.port)))
         } else {
@@ -70,49 +70,61 @@ impl Address {
     }
 }
 
-fn addr_to_be(addr: [u16; 8]) -> [u16; 8] {
-    // consensus_encode always encodes in LE, and we want to encode in BE.
-    // this utility fn swap bytes before encoding so that the encoded result will be BE
-    let mut result = addr;
-    for word in &mut result {
-        *word = word.swap_bytes();
-    }
-    result
-}
-
 impl Encodable for Address {
     #[inline]
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let len = self.services.consensus_encode(&mut s)?
-            + addr_to_be(self.address).consensus_encode(&mut s)?
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let mut len = self.services.consensus_encode(w)?;
+
+        for word in &self.address {
+            w.write_all(&word.to_be_bytes())?;
+            len += 2;
+        }
+
+        w.write_all(&self.port.to_be_bytes())?;
+        len += 2;
 
-            // consensus_encode always encodes in LE, and we want to encode in BE.
-            //TODO `len += io::Write::write(&mut e, &self.port.to_be_bytes())?;` when MSRV >= 1.32
-            + self.port.swap_bytes().consensus_encode(s)?;
         Ok(len)
     }
 }
 
 impl Decodable for Address {
     #[inline]
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
         Ok(Address {
-            services: Decodable::consensus_decode(&mut d)?,
-            address: addr_to_be(Decodable::consensus_decode(&mut d)?),
-            port: u16::swap_bytes(Decodable::consensus_decode(d)?)
+            services: Decodable::consensus_decode(r)?,
+            address: read_be_address(r)?,
+            port: u16::swap_bytes(Decodable::consensus_decode(r)?),
         })
     }
 }
 
+/// Read a big-endian address from reader.
+fn read_be_address<R: io::Read + ?Sized>(r: &mut R) -> Result<[u16; 8], encode::Error> {
+    let mut address = [0u16; 8];
+    let mut buf = [0u8; 2];
+
+    for word in &mut address {
+        io::Read::read_exact(r, &mut buf)?;
+        *word = u16::from_be_bytes(buf)
+    }
+    Ok(address)
+}
+
 impl fmt::Debug for Address {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         let ipv6 = Ipv6Addr::from(self.address);
 
         match ipv6.to_ipv4() {
-            Some(addr) => write!(f, "Address {{services: {}, address: {}, port: {}}}",
-                self.services, addr, self.port),
-            None => write!(f, "Address {{services: {}, address: {}, port: {}}}",
-                self.services, ipv6, self.port)
+            Some(addr) => write!(
+                f,
+                "Address {{services: {}, address: {}, port: {}}}",
+                self.services, addr, self.port
+            ),
+            None => write!(
+                f,
+                "Address {{services: {}, address: {}, port: {}}}",
+                self.services, ipv6, self.port
+            ),
         }
     }
 }
@@ -144,12 +156,16 @@ pub enum AddrV2 {
 }
 
 impl Encodable for AddrV2 {
-    fn consensus_encode<W: io::Write>(&self, e: W) -> Result<usize, io::Error> {
-        fn encode_addr<W: io::Write>(mut e: W, network: u8, bytes: &[u8]) -> Result<usize, io::Error> {
-            let len = network.consensus_encode(&mut e)?
-                + VarInt(bytes.len() as u64).consensus_encode(&mut e)?
+    fn consensus_encode<W: io::Write + ?Sized>(&self, e: &mut W) -> Result<usize, io::Error> {
+        fn encode_addr<W: io::Write + ?Sized>(
+            w: &mut W,
+            network: u8,
+            bytes: &[u8],
+        ) -> Result<usize, io::Error> {
+            let len = network.consensus_encode(w)?
+                + VarInt(bytes.len() as u64).consensus_encode(w)?
                 + bytes.len();
-            e.emit_slice(bytes)?;
+            w.emit_slice(bytes)?;
             Ok(len)
         }
         Ok(match *self {
@@ -159,15 +175,15 @@ impl Encodable for AddrV2 {
             AddrV2::TorV3(ref bytes) => encode_addr(e, 4, bytes)?,
             AddrV2::I2p(ref bytes) => encode_addr(e, 5, bytes)?,
             AddrV2::Cjdns(ref addr) => encode_addr(e, 6, &addr.octets())?,
-            AddrV2::Unknown(network, ref bytes) => encode_addr(e, network, bytes)?
+            AddrV2::Unknown(network, ref bytes) => encode_addr(e, network, bytes)?,
         })
     }
 }
 
 impl Decodable for AddrV2 {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let network_id = u8::consensus_decode(&mut d)?;
-        let len = VarInt::consensus_decode(&mut d)?.0;
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let network_id = u8::consensus_decode(r)?;
+        let len = VarInt::consensus_decode(r)?.0;
         if len > 512 {
             return Err(encode::Error::ParseFailed("IP must be <= 512 bytes"));
         }
@@ -176,59 +192,66 @@ impl Decodable for AddrV2 {
                 if len != 4 {
                     return Err(encode::Error::ParseFailed("Invalid IPv4 address"));
                 }
-                let addr: [u8; 4] = Decodable::consensus_decode(&mut d)?;
+                let addr: [u8; 4] = Decodable::consensus_decode(r)?;
                 AddrV2::Ipv4(Ipv4Addr::new(addr[0], addr[1], addr[2], addr[3]))
-            },
+            }
             2 => {
                 if len != 16 {
                     return Err(encode::Error::ParseFailed("Invalid IPv6 address"));
                 }
-                let addr: [u16; 8] = addr_to_be(Decodable::consensus_decode(&mut d)?);
+                let addr: [u16; 8] = read_be_address(r)?;
                 if addr[0..3] == ONION {
-                    return Err(encode::Error::ParseFailed("OnionCat address sent with IPv6 network id"));
+                    return Err(encode::Error::ParseFailed(
+                        "OnionCat address sent with IPv6 network id",
+                    ));
                 }
                 if addr[0..6] == [0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xFFFF] {
-                    return Err(encode::Error::ParseFailed("IPV4 wrapped address sent with IPv6 network id"));
+                    return Err(encode::Error::ParseFailed(
+                        "IPV4 wrapped address sent with IPv6 network id",
+                    ));
                 }
-                AddrV2::Ipv6(Ipv6Addr::new(addr[0], addr[1], addr[2], addr[3], addr[4], addr[5], addr[6], addr[7]))
-            },
+                AddrV2::Ipv6(Ipv6Addr::new(
+                    addr[0], addr[1], addr[2], addr[3], addr[4], addr[5], addr[6], addr[7],
+                ))
+            }
             3 => {
                 if len != 10 {
                     return Err(encode::Error::ParseFailed("Invalid TorV2 address"));
                 }
-                let id = Decodable::consensus_decode(&mut d)?;
+                let id = Decodable::consensus_decode(r)?;
                 AddrV2::TorV2(id)
-            },
+            }
             4 => {
                 if len != 32 {
                     return Err(encode::Error::ParseFailed("Invalid TorV3 address"));
                 }
-                let pubkey = Decodable::consensus_decode(&mut d)?;
+                let pubkey = Decodable::consensus_decode(r)?;
                 AddrV2::TorV3(pubkey)
-            },
+            }
             5 => {
                 if len != 32 {
                     return Err(encode::Error::ParseFailed("Invalid I2P address"));
                 }
-                let hash = Decodable::consensus_decode(&mut d)?;
+                let hash = Decodable::consensus_decode(r)?;
                 AddrV2::I2p(hash)
-            },
+            }
             6 => {
-                if len != 16  {
+                if len != 16 {
                     return Err(encode::Error::ParseFailed("Invalid CJDNS address"));
                 }
-                let addr: [u16; 8] = Decodable::consensus_decode(&mut d)?;
+                let addr: [u16; 8] = read_be_address(r)?;
                 // check the first byte for the CJDNS marker
-                if addr[0] as u8 != 0xFC {
+                if addr[0] != u16::from_be_bytes([0xFC, 0x00]) {
                     return Err(encode::Error::ParseFailed("Invalid CJDNS address"));
                 }
-                let addr = addr_to_be(addr);
-                AddrV2::Cjdns(Ipv6Addr::new(addr[0], addr[1], addr[2], addr[3], addr[4], addr[5], addr[6], addr[7]))
-            },
+                AddrV2::Cjdns(Ipv6Addr::new(
+                    addr[0], addr[1], addr[2], addr[3], addr[4], addr[5], addr[6], addr[7],
+                ))
+            }
             _ => {
                 // len already checked above to be <= 512
                 let mut addr = vec![0u8; len as usize];
-                d.read_slice(&mut addr)?;
+                r.read_slice(&mut addr)?;
                 AddrV2::Unknown(network_id, addr)
             }
         })
@@ -245,7 +268,7 @@ pub struct AddrV2Message {
     /// Network ID + Network Address
     pub addr: AddrV2,
     /// Network port, 0 if not applicable
-    pub port: u16
+    pub port: u16,
 }
 
 impl AddrV2Message {
@@ -262,26 +285,26 @@ impl AddrV2Message {
 }
 
 impl Encodable for AddrV2Message {
-    fn consensus_encode<W: io::Write>(&self, mut e: W) -> Result<usize, io::Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
         let mut len = 0;
-        len += self.time.consensus_encode(&mut e)?;
-        len += VarInt(self.services.as_u64()).consensus_encode(&mut e)?;
-        len += self.addr.consensus_encode(&mut e)?;
+        len += self.time.consensus_encode(w)?;
+        len += VarInt(self.services.as_u64()).consensus_encode(w)?;
+        len += self.addr.consensus_encode(w)?;
+
+        w.write_all(&self.port.to_be_bytes())?;
+        len += 2; // port u16 is two bytes.
 
-        // consensus_encode always encodes in LE, and we want to encode in BE.
-        //TODO `len += io::Write::write(&mut e, &self.port.to_be_bytes())?;` when MSRV >= 1.32
-        len += self.port.swap_bytes().consensus_encode(e)?;
         Ok(len)
     }
 }
 
 impl Decodable for AddrV2Message {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
         Ok(AddrV2Message {
-            time: Decodable::consensus_decode(&mut d)?,
-            services: ServiceFlags::from(VarInt::consensus_decode(&mut d)?.0),
-            addr: Decodable::consensus_decode(&mut d)?,
-            port: u16::swap_bytes(Decodable::consensus_decode(d)?),
+            time: Decodable::consensus_decode(r)?,
+            services: ServiceFlags::from(VarInt::consensus_decode(r)?.0),
+            addr: Decodable::consensus_decode(r)?,
+            port: u16::swap_bytes(Decodable::consensus_decode(r)?),
         })
     }
 }
@@ -296,22 +319,28 @@ impl ToSocketAddrs for AddrV2Message {
 #[cfg(test)]
 mod test {
     use core::str::FromStr;
-    use super::{AddrV2Message, AddrV2, Address};
-    use network::constants::ServiceFlags;
-    use std::net::{SocketAddr, IpAddr, Ipv4Addr, Ipv6Addr};
+    use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr};
+
     use hashes::hex::FromHex;
 
-    use consensus::encode::{deserialize, serialize};
+    use super::{AddrV2, AddrV2Message, Address};
+    use crate::consensus::encode::{deserialize, serialize};
+    use crate::internal_macros::hex;
+    use crate::network::constants::ServiceFlags;
 
     #[test]
     fn serialize_address_test() {
-        assert_eq!(serialize(&Address {
-            services: ServiceFlags::NETWORK,
-            address: [0, 0, 0, 0, 0, 0xffff, 0x0a00, 0x0001],
-            port: 8333
-        }),
-        vec![1u8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-             0, 0, 0, 0xff, 0xff, 0x0a, 0, 0, 1, 0x20, 0x8d]);
+        assert_eq!(
+            serialize(&Address {
+                services: ServiceFlags::NETWORK,
+                address: [0, 0, 0, 0, 0, 0xffff, 0x0a00, 0x0001],
+                port: 8333
+            }),
+            vec![
+                1u8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0x0a, 0, 0, 1,
+                0x20, 0x8d
+            ]
+        );
     }
 
     #[test]
@@ -338,41 +367,44 @@ mod test {
 
     #[test]
     fn deserialize_address_test() {
-        let mut addr: Result<Address, _> = deserialize(&[1u8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-                                                       0, 0, 0, 0, 0, 0, 0xff, 0xff, 0x0a, 0,
-                                                       0, 1, 0x20, 0x8d]);
+        let mut addr: Result<Address, _> = deserialize(&[
+            1u8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0x0a, 0, 0, 1,
+            0x20, 0x8d,
+        ]);
         assert!(addr.is_ok());
         let full = addr.unwrap();
-        assert!(match full.socket_addr().unwrap() {
-                    SocketAddr::V4(_) => true,
-                    _ => false
-                }
-            );
+        assert!(matches!(full.socket_addr().unwrap(), SocketAddr::V4(_)));
         assert_eq!(full.services, ServiceFlags::NETWORK);
         assert_eq!(full.address, [0, 0, 0, 0, 0, 0xffff, 0x0a00, 0x0001]);
         assert_eq!(full.port, 8333);
 
-        addr = deserialize(&[1u8, 0, 0, 0, 0, 0, 0, 0, 0,
-                             0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0x0a, 0, 0, 1]);
+        addr = deserialize(&[
+            1u8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0x0a, 0, 0, 1,
+        ]);
         assert!(addr.is_err());
     }
 
     #[test]
-    fn test_socket_addr () {
-        let s4 = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(111,222,123,4)), 5555);
+    fn test_socket_addr() {
+        let s4 = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(111, 222, 123, 4)), 5555);
         let a4 = Address::new(&s4, ServiceFlags::NETWORK | ServiceFlags::WITNESS);
         assert_eq!(a4.socket_addr().unwrap(), s4);
-        let s6 = SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0x1111, 0x2222, 0x3333, 0x4444,
-        0x5555, 0x6666, 0x7777, 0x8888)), 9999);
+        let s6 = SocketAddr::new(
+            IpAddr::V6(Ipv6Addr::new(
+                0x1111, 0x2222, 0x3333, 0x4444, 0x5555, 0x6666, 0x7777, 0x8888,
+            )),
+            9999,
+        );
         let a6 = Address::new(&s6, ServiceFlags::NETWORK | ServiceFlags::WITNESS);
         assert_eq!(a6.socket_addr().unwrap(), s6);
     }
 
     #[test]
-    fn onion_test () {
+    fn onion_test() {
         let onionaddr = SocketAddr::new(
-            IpAddr::V6(
-            Ipv6Addr::from_str("FD87:D87E:EB43:edb1:8e4:3588:e546:35ca").unwrap()), 1111);
+            IpAddr::V6(Ipv6Addr::from_str("FD87:D87E:EB43:edb1:8e4:3588:e546:35ca").unwrap()),
+            1111,
+        );
         let addr = Address::new(&onionaddr, ServiceFlags::NONE);
         assert!(addr.socket_addr().is_err());
     }
@@ -382,25 +414,38 @@ mod test {
         // Taken from https://github.com/bitcoin/bitcoin/blob/12a1c3ad1a43634d2a98717e49e3f02c4acea2fe/src/test/net_tests.cpp#L348
 
         let ip = AddrV2::Ipv4(Ipv4Addr::new(1, 2, 3, 4));
-        assert_eq!(serialize(&ip), Vec::from_hex("010401020304").unwrap());
+        assert_eq!(serialize(&ip), hex!("010401020304"));
 
-        let ip = AddrV2::Ipv6(Ipv6Addr::from_str("1a1b:2a2b:3a3b:4a4b:5a5b:6a6b:7a7b:8a8b").unwrap());
-        assert_eq!(serialize(&ip), Vec::from_hex("02101a1b2a2b3a3b4a4b5a5b6a6b7a7b8a8b").unwrap());
+        let ip =
+            AddrV2::Ipv6(Ipv6Addr::from_str("1a1b:2a2b:3a3b:4a4b:5a5b:6a6b:7a7b:8a8b").unwrap());
+        assert_eq!(serialize(&ip), hex!("02101a1b2a2b3a3b4a4b5a5b6a6b7a7b8a8b"));
 
         let ip = AddrV2::TorV2(FromHex::from_hex("f1f2f3f4f5f6f7f8f9fa").unwrap());
-        assert_eq!(serialize(&ip), Vec::from_hex("030af1f2f3f4f5f6f7f8f9fa").unwrap());
+        assert_eq!(serialize(&ip), hex!("030af1f2f3f4f5f6f7f8f9fa"));
 
-        let ip = AddrV2::TorV3(FromHex::from_hex("53cd5648488c4707914182655b7664034e09e66f7e8cbf1084e654eb56c5bd88").unwrap());
-        assert_eq!(serialize(&ip), Vec::from_hex("042053cd5648488c4707914182655b7664034e09e66f7e8cbf1084e654eb56c5bd88").unwrap());
+        let ip = AddrV2::TorV3(
+            FromHex::from_hex("53cd5648488c4707914182655b7664034e09e66f7e8cbf1084e654eb56c5bd88")
+                .unwrap(),
+        );
+        assert_eq!(
+            serialize(&ip),
+            hex!("042053cd5648488c4707914182655b7664034e09e66f7e8cbf1084e654eb56c5bd88")
+        );
 
-        let ip = AddrV2::I2p(FromHex::from_hex("a2894dabaec08c0051a481a6dac88b64f98232ae42d4b6fd2fa81952dfe36a87").unwrap());
-        assert_eq!(serialize(&ip), Vec::from_hex("0520a2894dabaec08c0051a481a6dac88b64f98232ae42d4b6fd2fa81952dfe36a87").unwrap());
+        let ip = AddrV2::I2p(
+            FromHex::from_hex("a2894dabaec08c0051a481a6dac88b64f98232ae42d4b6fd2fa81952dfe36a87")
+                .unwrap(),
+        );
+        assert_eq!(
+            serialize(&ip),
+            hex!("0520a2894dabaec08c0051a481a6dac88b64f98232ae42d4b6fd2fa81952dfe36a87")
+        );
 
         let ip = AddrV2::Cjdns(Ipv6Addr::from_str("fc00:1:2:3:4:5:6:7").unwrap());
-        assert_eq!(serialize(&ip), Vec::from_hex("0610fc000001000200030004000500060007").unwrap());
+        assert_eq!(serialize(&ip), hex!("0610fc000001000200030004000500060007"));
 
-        let ip = AddrV2::Unknown(170, Vec::from_hex("01020304").unwrap());
-        assert_eq!(serialize(&ip), Vec::from_hex("aa0401020304").unwrap());
+        let ip = AddrV2::Unknown(170, hex!("01020304"));
+        assert_eq!(serialize(&ip), hex!("aa0401020304"));
     }
 
     #[test]
@@ -408,83 +453,123 @@ mod test {
         // Taken from https://github.com/bitcoin/bitcoin/blob/12a1c3ad1a43634d2a98717e49e3f02c4acea2fe/src/test/net_tests.cpp#L386
 
         // Valid IPv4.
-        let ip: AddrV2 = deserialize(&Vec::from_hex("010401020304").unwrap()).unwrap();
+        let ip: AddrV2 = deserialize(&hex!("010401020304")).unwrap();
         assert_eq!(ip, AddrV2::Ipv4(Ipv4Addr::new(1, 2, 3, 4)));
 
         // Invalid IPv4, valid length but address itself is shorter.
-        deserialize::<AddrV2>(&Vec::from_hex("01040102").unwrap()).unwrap_err();
+        deserialize::<AddrV2>(&hex!("01040102")).unwrap_err();
 
         // Invalid IPv4, with bogus length.
-        assert!(deserialize::<AddrV2>(&Vec::from_hex("010501020304").unwrap()).is_err());
+        assert!(deserialize::<AddrV2>(&hex!("010501020304")).is_err());
 
         // Invalid IPv4, with extreme length.
-        assert!(deserialize::<AddrV2>(&Vec::from_hex("01fd010201020304").unwrap()).is_err());
+        assert!(deserialize::<AddrV2>(&hex!("01fd010201020304")).is_err());
 
         // Valid IPv6.
-        let ip: AddrV2 = deserialize(&Vec::from_hex("02100102030405060708090a0b0c0d0e0f10").unwrap()).unwrap();
-        assert_eq!(ip, AddrV2::Ipv6(Ipv6Addr::from_str("102:304:506:708:90a:b0c:d0e:f10").unwrap()));
+        let ip: AddrV2 = deserialize(&hex!("02100102030405060708090a0b0c0d0e0f10")).unwrap();
+        assert_eq!(
+            ip,
+            AddrV2::Ipv6(Ipv6Addr::from_str("102:304:506:708:90a:b0c:d0e:f10").unwrap())
+        );
 
         // Invalid IPv6, with bogus length.
-        assert!(deserialize::<AddrV2>(&Vec::from_hex("020400").unwrap()).is_err());
+        assert!(deserialize::<AddrV2>(&hex!("020400")).is_err());
 
         // Invalid IPv6, contains embedded IPv4.
-        assert!(deserialize::<AddrV2>(&Vec::from_hex("021000000000000000000000ffff01020304").unwrap()).is_err());
+        assert!(deserialize::<AddrV2>(&hex!("021000000000000000000000ffff01020304")).is_err());
 
         // Invalid IPv6, contains embedded TORv2.
-        assert!(deserialize::<AddrV2>(&Vec::from_hex("0210fd87d87eeb430102030405060708090a").unwrap()).is_err());
+        assert!(deserialize::<AddrV2>(&hex!("0210fd87d87eeb430102030405060708090a")).is_err());
 
         // Valid TORv2.
-        let ip: AddrV2 = deserialize(&Vec::from_hex("030af1f2f3f4f5f6f7f8f9fa").unwrap()).unwrap();
+        let ip: AddrV2 = deserialize(&hex!("030af1f2f3f4f5f6f7f8f9fa")).unwrap();
         assert_eq!(ip, AddrV2::TorV2(FromHex::from_hex("f1f2f3f4f5f6f7f8f9fa").unwrap()));
 
         // Invalid TORv2, with bogus length.
-        assert!(deserialize::<AddrV2>(&Vec::from_hex("030700").unwrap()).is_err());
+        assert!(deserialize::<AddrV2>(&hex!("030700")).is_err());
 
         // Valid TORv3.
-        let ip: AddrV2 = deserialize(&Vec::from_hex("042079bcc625184b05194975c28b66b66b0469f7f6556fb1ac3189a79b40dda32f1f").unwrap()).unwrap();
-        assert_eq!(ip, AddrV2::TorV3(FromHex::from_hex("79bcc625184b05194975c28b66b66b0469f7f6556fb1ac3189a79b40dda32f1f").unwrap()));
+        let ip: AddrV2 = deserialize(&hex!(
+            "042079bcc625184b05194975c28b66b66b0469f7f6556fb1ac3189a79b40dda32f1f"
+        ))
+            .unwrap();
+        assert_eq!(
+            ip,
+            AddrV2::TorV3(
+                FromHex::from_hex(
+                    "79bcc625184b05194975c28b66b66b0469f7f6556fb1ac3189a79b40dda32f1f"
+                )
+                    .unwrap()
+            )
+        );
 
         // Invalid TORv3, with bogus length.
-        assert!(deserialize::<AddrV2>(&Vec::from_hex("040000").unwrap()).is_err());
+        assert!(deserialize::<AddrV2>(&hex!("040000")).is_err());
 
         // Valid I2P.
-        let ip: AddrV2 = deserialize(&Vec::from_hex("0520a2894dabaec08c0051a481a6dac88b64f98232ae42d4b6fd2fa81952dfe36a87").unwrap()).unwrap();
-        assert_eq!(ip, AddrV2::I2p(FromHex::from_hex("a2894dabaec08c0051a481a6dac88b64f98232ae42d4b6fd2fa81952dfe36a87").unwrap()));
+        let ip: AddrV2 = deserialize(&hex!(
+            "0520a2894dabaec08c0051a481a6dac88b64f98232ae42d4b6fd2fa81952dfe36a87"
+        ))
+            .unwrap();
+        assert_eq!(
+            ip,
+            AddrV2::I2p(
+                FromHex::from_hex(
+                    "a2894dabaec08c0051a481a6dac88b64f98232ae42d4b6fd2fa81952dfe36a87"
+                )
+                    .unwrap()
+            )
+        );
 
         // Invalid I2P, with bogus length.
-        assert!(deserialize::<AddrV2>(&Vec::from_hex("050300").unwrap()).is_err());
+        assert!(deserialize::<AddrV2>(&hex!("050300")).is_err());
 
         // Valid CJDNS.
-        let ip: AddrV2 = deserialize(&Vec::from_hex("0610fc000001000200030004000500060007").unwrap()).unwrap();
+        let ip: AddrV2 = deserialize(&hex!("0610fc000001000200030004000500060007")).unwrap();
         assert_eq!(ip, AddrV2::Cjdns(Ipv6Addr::from_str("fc00:1:2:3:4:5:6:7").unwrap()));
 
         // Invalid CJDNS, incorrect marker
-        assert!(deserialize::<AddrV2>(&Vec::from_hex("0610fd000001000200030004000500060007").unwrap()).is_err());
+        assert!(deserialize::<AddrV2>(&hex!("0610fd000001000200030004000500060007")).is_err());
 
         // Invalid CJDNS, with bogus length.
-        assert!(deserialize::<AddrV2>(&Vec::from_hex("060100").unwrap()).is_err());
+        assert!(deserialize::<AddrV2>(&hex!("060100")).is_err());
 
         // Unknown, with extreme length.
-        assert!(deserialize::<AddrV2>(&Vec::from_hex("aafe0000000201020304050607").unwrap()).is_err());
+        assert!(deserialize::<AddrV2>(&hex!("aafe0000000201020304050607")).is_err());
 
         // Unknown, with reasonable length.
-        let ip: AddrV2 = deserialize(&Vec::from_hex("aa0401020304").unwrap()).unwrap();
-        assert_eq!(ip, AddrV2::Unknown(170, Vec::from_hex("01020304").unwrap()));
+        let ip: AddrV2 = deserialize(&hex!("aa0401020304")).unwrap();
+        assert_eq!(ip, AddrV2::Unknown(170, hex!("01020304")));
 
         // Unknown, with zero length.
-        let ip: AddrV2 = deserialize(&Vec::from_hex("aa00").unwrap()).unwrap();
+        let ip: AddrV2 = deserialize(&hex!("aa00")).unwrap();
         assert_eq!(ip, AddrV2::Unknown(170, vec![]));
     }
 
     #[test]
     fn addrv2message_test() {
-        let raw = Vec::from_hex("0261bc6649019902abab208d79627683fd4804010409090909208d").unwrap();
+        let raw = hex!("0261bc6649019902abab208d79627683fd4804010409090909208d");
         let addresses: Vec<AddrV2Message> = deserialize(&raw).unwrap();
 
-        assert_eq!(addresses, vec![
-            AddrV2Message{services: ServiceFlags::NETWORK, time: 0x4966bc61, port: 8333, addr: AddrV2::Unknown(153, Vec::from_hex("abab").unwrap())},
-            AddrV2Message{services: ServiceFlags::NETWORK_LIMITED | ServiceFlags::WITNESS | ServiceFlags::COMPACT_FILTERS, time: 0x83766279, port: 8333, addr: AddrV2::Ipv4(Ipv4Addr::new(9, 9, 9, 9))},
-        ]);
+        assert_eq!(
+            addresses,
+            vec![
+                AddrV2Message {
+                    services: ServiceFlags::NETWORK,
+                    time: 0x4966bc61,
+                    port: 8333,
+                    addr: AddrV2::Unknown(153, hex!("abab"))
+                },
+                AddrV2Message {
+                    services: ServiceFlags::NETWORK_LIMITED
+                        | ServiceFlags::WITNESS
+                        | ServiceFlags::COMPACT_FILTERS,
+                    time: 0x83766279,
+                    port: 8333,
+                    addr: AddrV2::Ipv4(Ipv4Addr::new(9, 9, 9, 9))
+                },
+            ]
+        );
 
         assert_eq!(serialize(&addresses), raw);
     }
diff --git a/src/network/constants.rs b/dash/src/network/constants.rs
similarity index 78%
rename from src/network/constants.rs
rename to dash/src/network/constants.rs
index 21a97c385..080c1019b 100644
--- a/src/network/constants.rs
+++ b/dash/src/network/constants.rs
@@ -41,9 +41,15 @@
 //! ```
 
 use core::{fmt, ops, convert::From};
+use core::fmt::Display;
+use core::str::FromStr;
 
-use io;
-use consensus::encode::{self, Encodable, Decodable};
+use crate::io;
+use internals::write_err;
+use crate::consensus::encode::{self, Encodable, Decodable};
+use crate::constants::ChainHash;
+use crate::error::impl_std_error;
+use crate::prelude::{String, ToOwned};
 
 /// Version of the protocol as appearing in network message headers
 /// This constant is used to signal to other peers which features you support.
@@ -62,19 +68,21 @@ use consensus::encode::{self, Encodable, Decodable};
 /// 60001 - Support `pong` message and nonce in `ping` message
 pub const PROTOCOL_VERSION: u32 = 70220;
 
-user_enum! {
-    /// The cryptocurrency to act on
-    #[derive(Copy, PartialEq, Eq, PartialOrd, Ord, Clone, Hash, Debug)]
-    pub enum Network {
-        /// Classic Dash Core Payment Chain
-        Dash <-> "dash",
-        /// Dash's testnet
-        Testnet <-> "testnet",
-        /// A Dash devnet
-        Devnet <-> "devnet",
-        /// Dash's regtest
-        Regtest <-> "regtest"
-    }
+/// The cryptocurrency network to act on.
+#[derive(Copy, PartialEq, Eq, PartialOrd, Ord, Clone, Hash, Debug)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+#[cfg_attr(feature = "serde", serde(rename_all = "lowercase"))]
+#[non_exhaustive]
+pub enum Network {
+    /// Classic Dash Core Payment Chain
+    Dash,
+    /// Dash's testnet network.
+    Testnet,
+    /// Dash's devnet network.
+    Devnet,
+    /// Bitcoin's regtest network.
+    Regtest,
 }
 
 impl Network {
@@ -115,12 +123,83 @@ impl Network {
         match self {
             Network::Dash => 0xBD6B0CBF,
             Network::Testnet => 0xFFCAE2CE,
-            Network::Devnet  => 0xCEFFCAE2,
+            Network::Devnet => 0xCEFFCAE2,
             Network::Regtest => 0xDAB5BFFA,
         }
     }
 }
 
+/// An error in parsing network string.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct ParseNetworkError(String);
+
+impl fmt::Display for ParseNetworkError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+        write_err!(f, "failed to parse {} as network", self.0; self)
+    }
+}
+impl_std_error!(ParseNetworkError);
+
+impl FromStr for Network {
+    type Err = ParseNetworkError;
+
+    #[inline]
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        use Network::*;
+
+        let network = match s {
+            "dash" => Dash,
+            "testnet" => Testnet,
+            "devnet" => Devnet,
+            "regtest" => Regtest,
+            _ => return Err(ParseNetworkError(s.to_owned())),
+        };
+        Ok(network)
+    }
+}
+
+impl fmt::Display for Network {
+    fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+        use Network::*;
+
+        let s = match *self {
+            Dash => "dash",
+            Testnet => "testnet",
+            Devnet => "devnet",
+            Regtest => "regtest",
+        };
+        write!(f, "{}", s)
+    }
+}
+
+
+/// Error in parsing network from chain hash.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct UnknownChainHash(ChainHash);
+
+impl Display for UnknownChainHash {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "unknown chain hash: {}", self.0)
+    }
+}
+
+impl_std_error!(UnknownChainHash);
+
+impl TryFrom<ChainHash> for Network {
+    type Error = UnknownChainHash;
+
+    fn try_from(chain_hash: ChainHash) -> Result<Self, Self::Error> {
+        match chain_hash {
+            // Note: any new network entries must be matched against here.
+            ChainHash::DASH => Ok(Network::Dash),
+            ChainHash::TESTNET => Ok(Network::Testnet),
+            ChainHash::DEVNET => Ok(Network::Devnet),
+            ChainHash::REGTEST => Ok(Network::Regtest),
+            _ => Err(UnknownChainHash(chain_hash)),
+        }
+    }
+}
+
 /// Flags to indicate which network services a node supports.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct ServiceFlags(u64);
@@ -277,22 +356,22 @@ impl ops::BitXorAssign for ServiceFlags {
 
 impl Encodable for ServiceFlags {
     #[inline]
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        self.0.consensus_encode(&mut s)
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        self.0.consensus_encode(w)
     }
 }
 
 impl Decodable for ServiceFlags {
     #[inline]
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        Ok(ServiceFlags(Decodable::consensus_decode(&mut d)?))
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        Ok(ServiceFlags(Decodable::consensus_decode(r)?))
     }
 }
 
 #[cfg(test)]
 mod tests {
     use super::{Network, ServiceFlags};
-    use consensus::encode::{deserialize, serialize};
+    use crate::consensus::encode::{deserialize, serialize};
 
     #[test]
     fn serialize_test() {
@@ -305,7 +384,6 @@ mod tests {
         assert_eq!(deserialize(&[0xce, 0xe2, 0xca, 0xff]).ok(), Some(Network::Testnet.magic()));
         assert_eq!(deserialize(&[0xe2, 0xca, 0xff, 0xce]).ok(), Some(Network::Devnet.magic()));
         assert_eq!(deserialize(&[0xfa, 0xbf, 0xb5, 0xda]).ok(), Some(Network::Regtest.magic()));
-
     }
 
     #[test]
diff --git a/dash/src/network/message.rs b/dash/src/network/message.rs
new file mode 100644
index 000000000..685927e45
--- /dev/null
+++ b/dash/src/network/message.rs
@@ -0,0 +1,832 @@
+// Rust Dash Library
+// Originally written in 2014 by
+//     Andrew Poelstra <apoelstra@wpsoftware.net>
+//     For Bitcoin
+// Updated for Dash in 2022 by
+//     The Dash Core Developers
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Bitcoin network messages.
+
+use core::convert::TryFrom;
+use core::{fmt, iter};
+
+use io::Read as _;
+
+use crate::blockdata::{block, transaction};
+use crate::consensus::encode::{CheckedData, Decodable, Encodable, VarInt};
+use crate::consensus::{encode, serialize};
+use crate::io;
+use crate::merkle_tree::MerkleBlock;
+use crate::network::address::{AddrV2Message, Address};
+use crate::network::{
+    message_blockdata, message_bloom, message_compact_blocks, message_filter, message_network,
+};
+use crate::prelude::*;
+
+/// The maximum number of [super::message_blockdata::Inventory] items in an `inv` message.
+///
+/// This limit is not currently enforced by this implementation.
+pub const MAX_INV_SIZE: usize = 50_000;
+
+/// Maximum size, in bytes, of an encoded message
+/// This by neccessity should be larger tham `MAX_VEC_SIZE`
+pub const MAX_MSG_SIZE: usize = 5_000_000;
+
+/// Serializer for command string
+#[derive(PartialEq, Eq, Clone, Debug)]
+pub struct CommandString(Cow<'static, str>);
+
+impl CommandString {
+    /// Converts `&'static str` to `CommandString`
+    ///
+    /// This is more efficient for string literals than non-static conversions because it avoids
+    /// allocation.
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if, and only if, the string is
+    /// larger than 12 characters in length.
+    pub fn try_from_static(s: &'static str) -> Result<CommandString, CommandStringError> {
+        Self::try_from_static_cow(s.into())
+    }
+
+    fn try_from_static_cow(cow: Cow<'static, str>) -> Result<CommandString, CommandStringError> {
+        if cow.len() > 12 {
+            Err(CommandStringError { cow })
+        } else {
+            Ok(CommandString(cow))
+        }
+    }
+}
+
+impl TryFrom<String> for CommandString {
+    type Error = CommandStringError;
+
+    fn try_from(value: String) -> Result<Self, Self::Error> {
+        Self::try_from_static_cow(value.into())
+    }
+}
+
+impl TryFrom<Box<str>> for CommandString {
+    type Error = CommandStringError;
+
+    fn try_from(value: Box<str>) -> Result<Self, Self::Error> {
+        Self::try_from_static_cow(String::from(value).into())
+    }
+}
+
+impl<'a> TryFrom<&'a str> for CommandString {
+    type Error = CommandStringError;
+
+    fn try_from(value: &'a str) -> Result<Self, Self::Error> {
+        Self::try_from_static_cow(value.to_owned().into())
+    }
+}
+
+impl core::str::FromStr for CommandString {
+    type Err = CommandStringError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Self::try_from_static_cow(s.to_owned().into())
+    }
+}
+
+impl fmt::Display for CommandString {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { f.write_str(self.0.as_ref()) }
+}
+
+impl AsRef<str> for CommandString {
+    fn as_ref(&self) -> &str { self.0.as_ref() }
+}
+
+impl Encodable for CommandString {
+    #[inline]
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let mut rawbytes = [0u8; 12];
+        let strbytes = self.0.as_bytes();
+        debug_assert!(strbytes.len() <= 12);
+        rawbytes[..strbytes.len()].copy_from_slice(strbytes);
+        rawbytes.consensus_encode(w)
+    }
+}
+
+impl Decodable for CommandString {
+    #[inline]
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let rawbytes: [u8; 12] = Decodable::consensus_decode(r)?;
+        let rv = iter::FromIterator::from_iter(rawbytes.iter().filter_map(|&u| {
+            if u > 0 {
+                Some(u as char)
+            } else {
+                None
+            }
+        }));
+        Ok(CommandString(rv))
+    }
+}
+
+/// Error returned when a command string is invalid.
+///
+/// This is currently returned for command strings longer than 12.
+#[derive(Clone, Debug)]
+pub struct CommandStringError {
+    cow: Cow<'static, str>,
+}
+
+impl fmt::Display for CommandStringError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "the command string '{}' has length {} which is larger than 12",
+            self.cow,
+            self.cow.len()
+        )
+    }
+}
+
+crate::error::impl_std_error!(CommandStringError);
+
+/// A Network message
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct RawNetworkMessage {
+    /// Magic bytes to identify the network these messages are meant for
+    pub magic: u32,
+    /// The actual message data
+    pub payload: NetworkMessage,
+}
+
+/// A Network message payload. Proper documentation is available on at
+/// [Bitcoin Wiki: Protocol Specification](https://en.bitcoin.it/wiki/Protocol_specification)
+#[derive(Clone, PartialEq, Eq, Debug)]
+pub enum NetworkMessage {
+    /// `version`
+    Version(message_network::VersionMessage),
+    /// `verack`
+    Verack,
+    /// `addr`
+    Addr(Vec<(u32, Address)>),
+    /// `inv`
+    Inv(Vec<message_blockdata::Inventory>),
+    /// `getdata`
+    GetData(Vec<message_blockdata::Inventory>),
+    /// `notfound`
+    NotFound(Vec<message_blockdata::Inventory>),
+    /// `getblocks`
+    GetBlocks(message_blockdata::GetBlocksMessage),
+    /// `getheaders`
+    GetHeaders(message_blockdata::GetHeadersMessage),
+    /// `mempool`
+    MemPool,
+    /// tx
+    Tx(transaction::Transaction),
+    /// `block`
+    Block(block::Block),
+    /// `headers`
+    Headers(Vec<block::Header>),
+    /// `sendheaders`
+    SendHeaders,
+    /// `getaddr`
+    GetAddr,
+    // TODO: checkorder,
+    // TODO: submitorder,
+    // TODO: reply,
+    /// `ping`
+    Ping(u64),
+    /// `pong`
+    Pong(u64),
+    /// `merkleblock`
+    MerkleBlock(MerkleBlock),
+    /// BIP 37 `filterload`
+    FilterLoad(message_bloom::FilterLoad),
+    /// BIP 37 `filteradd`
+    FilterAdd(message_bloom::FilterAdd),
+    /// BIP 37 `filterclear`
+    FilterClear,
+    /// BIP157 getcfilters
+    GetCFilters(message_filter::GetCFilters),
+    /// BIP157 cfilter
+    CFilter(message_filter::CFilter),
+    /// BIP157 getcfheaders
+    GetCFHeaders(message_filter::GetCFHeaders),
+    /// BIP157 cfheaders
+    CFHeaders(message_filter::CFHeaders),
+    /// BIP157 getcfcheckpt
+    GetCFCheckpt(message_filter::GetCFCheckpt),
+    /// BIP157 cfcheckpt
+    CFCheckpt(message_filter::CFCheckpt),
+    /// BIP152 sendcmpct
+    SendCmpct(message_compact_blocks::SendCmpct),
+    /// BIP152 cmpctblock
+    CmpctBlock(message_compact_blocks::CmpctBlock),
+    /// BIP152 getblocktxn
+    GetBlockTxn(message_compact_blocks::GetBlockTxn),
+    /// BIP152 blocktxn
+    BlockTxn(message_compact_blocks::BlockTxn),
+    /// `alert`
+    Alert(Vec<u8>),
+    /// `reject`
+    Reject(message_network::Reject),
+    /// `feefilter`
+    FeeFilter(i64),
+    /// `wtxidrelay`
+    WtxidRelay,
+    /// `addrv2`
+    AddrV2(Vec<AddrV2Message>),
+    /// `sendaddrv2`
+    SendAddrV2,
+
+    /// Any other message.
+    Unknown {
+        /// The command of this message.
+        command: CommandString,
+        /// The payload of this message.
+        payload: Vec<u8>,
+    },
+}
+
+impl NetworkMessage {
+    /// Return the message command as a static string reference.
+    ///
+    /// This returns `"unknown"` for [NetworkMessage::Unknown],
+    /// regardless of the actual command in the unknown message.
+    /// Use the [Self::command] method to get the command for unknown messages.
+    pub fn cmd(&self) -> &'static str {
+        match *self {
+            NetworkMessage::Version(_) => "version",
+            NetworkMessage::Verack => "verack",
+            NetworkMessage::Addr(_) => "addr",
+            NetworkMessage::Inv(_) => "inv",
+            NetworkMessage::GetData(_) => "getdata",
+            NetworkMessage::NotFound(_) => "notfound",
+            NetworkMessage::GetBlocks(_) => "getblocks",
+            NetworkMessage::GetHeaders(_) => "getheaders",
+            NetworkMessage::MemPool => "mempool",
+            NetworkMessage::Tx(_) => "tx",
+            NetworkMessage::Block(_) => "block",
+            NetworkMessage::Headers(_) => "headers",
+            NetworkMessage::SendHeaders => "sendheaders",
+            NetworkMessage::GetAddr => "getaddr",
+            NetworkMessage::Ping(_) => "ping",
+            NetworkMessage::Pong(_) => "pong",
+            NetworkMessage::MerkleBlock(_) => "merkleblock",
+            NetworkMessage::FilterLoad(_) => "filterload",
+            NetworkMessage::FilterAdd(_) => "filteradd",
+            NetworkMessage::FilterClear => "filterclear",
+            NetworkMessage::GetCFilters(_) => "getcfilters",
+            NetworkMessage::CFilter(_) => "cfilter",
+            NetworkMessage::GetCFHeaders(_) => "getcfheaders",
+            NetworkMessage::CFHeaders(_) => "cfheaders",
+            NetworkMessage::GetCFCheckpt(_) => "getcfcheckpt",
+            NetworkMessage::CFCheckpt(_) => "cfcheckpt",
+            NetworkMessage::SendCmpct(_) => "sendcmpct",
+            NetworkMessage::CmpctBlock(_) => "cmpctblock",
+            NetworkMessage::GetBlockTxn(_) => "getblocktxn",
+            NetworkMessage::BlockTxn(_) => "blocktxn",
+            NetworkMessage::Alert(_) => "alert",
+            NetworkMessage::Reject(_) => "reject",
+            NetworkMessage::FeeFilter(_) => "feefilter",
+            NetworkMessage::WtxidRelay => "wtxidrelay",
+            NetworkMessage::AddrV2(_) => "addrv2",
+            NetworkMessage::SendAddrV2 => "sendaddrv2",
+            NetworkMessage::Unknown { .. } => "unknown",
+        }
+    }
+
+    /// Return the CommandString for the message command.
+    pub fn command(&self) -> CommandString {
+        match *self {
+            NetworkMessage::Unknown { command: ref c, .. } => c.clone(),
+            _ => CommandString::try_from_static(self.cmd()).expect("cmd returns valid commands"),
+        }
+    }
+}
+
+impl RawNetworkMessage {
+    /// Return the message command as a static string reference.
+    ///
+    /// This returns `"unknown"` for [NetworkMessage::Unknown],
+    /// regardless of the actual command in the unknown message.
+    /// Use the [Self::command] method to get the command for unknown messages.
+    pub fn cmd(&self) -> &'static str { self.payload.cmd() }
+
+    /// Return the CommandString for the message command.
+    pub fn command(&self) -> CommandString { self.payload.command() }
+}
+
+struct HeaderSerializationWrapper<'a>(&'a Vec<block::Header>);
+
+impl<'a> Encodable for HeaderSerializationWrapper<'a> {
+    #[inline]
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let mut len = 0;
+        len += VarInt(self.0.len() as u64).consensus_encode(w)?;
+        for header in self.0.iter() {
+            len += header.consensus_encode(w)?;
+            len += 0u8.consensus_encode(w)?;
+        }
+        Ok(len)
+    }
+}
+
+impl Encodable for RawNetworkMessage {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let mut len = 0;
+        len += self.magic.consensus_encode(w)?;
+        len += self.command().consensus_encode(w)?;
+        len += CheckedData(match self.payload {
+            NetworkMessage::Version(ref dat) => serialize(dat),
+            NetworkMessage::Addr(ref dat) => serialize(dat),
+            NetworkMessage::Inv(ref dat) => serialize(dat),
+            NetworkMessage::GetData(ref dat) => serialize(dat),
+            NetworkMessage::NotFound(ref dat) => serialize(dat),
+            NetworkMessage::GetBlocks(ref dat) => serialize(dat),
+            NetworkMessage::GetHeaders(ref dat) => serialize(dat),
+            NetworkMessage::Tx(ref dat) => serialize(dat),
+            NetworkMessage::Block(ref dat) => serialize(dat),
+            NetworkMessage::Headers(ref dat) => serialize(&HeaderSerializationWrapper(dat)),
+            NetworkMessage::Ping(ref dat) => serialize(dat),
+            NetworkMessage::Pong(ref dat) => serialize(dat),
+            NetworkMessage::MerkleBlock(ref dat) => serialize(dat),
+            NetworkMessage::FilterLoad(ref dat) => serialize(dat),
+            NetworkMessage::FilterAdd(ref dat) => serialize(dat),
+            NetworkMessage::GetCFilters(ref dat) => serialize(dat),
+            NetworkMessage::CFilter(ref dat) => serialize(dat),
+            NetworkMessage::GetCFHeaders(ref dat) => serialize(dat),
+            NetworkMessage::CFHeaders(ref dat) => serialize(dat),
+            NetworkMessage::GetCFCheckpt(ref dat) => serialize(dat),
+            NetworkMessage::CFCheckpt(ref dat) => serialize(dat),
+            NetworkMessage::SendCmpct(ref dat) => serialize(dat),
+            NetworkMessage::CmpctBlock(ref dat) => serialize(dat),
+            NetworkMessage::GetBlockTxn(ref dat) => serialize(dat),
+            NetworkMessage::BlockTxn(ref dat) => serialize(dat),
+            NetworkMessage::Alert(ref dat) => serialize(dat),
+            NetworkMessage::Reject(ref dat) => serialize(dat),
+            NetworkMessage::FeeFilter(ref data) => serialize(data),
+            NetworkMessage::AddrV2(ref dat) => serialize(dat),
+            NetworkMessage::Verack
+            | NetworkMessage::SendHeaders
+            | NetworkMessage::MemPool
+            | NetworkMessage::GetAddr
+            | NetworkMessage::WtxidRelay
+            | NetworkMessage::FilterClear
+            | NetworkMessage::SendAddrV2 => vec![],
+            NetworkMessage::Unknown { payload: ref data, .. } => serialize(data),
+        })
+            .consensus_encode(w)?;
+        Ok(len)
+    }
+}
+
+struct HeaderDeserializationWrapper(Vec<block::Header>);
+
+impl Decodable for HeaderDeserializationWrapper {
+    #[inline]
+    fn consensus_decode_from_finite_reader<R: io::Read + ?Sized>(
+        r: &mut R,
+    ) -> Result<Self, encode::Error> {
+        let len = VarInt::consensus_decode(r)?.0;
+        // should be above usual number of items to avoid
+        // allocation
+        let mut ret = Vec::with_capacity(core::cmp::min(1024 * 16, len as usize));
+        for _ in 0..len {
+            ret.push(Decodable::consensus_decode(r)?);
+            if u8::consensus_decode(r)? != 0u8 {
+                return Err(encode::Error::ParseFailed(
+                    "Headers message should not contain transactions",
+                ));
+            }
+        }
+        Ok(HeaderDeserializationWrapper(ret))
+    }
+
+    #[inline]
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        Self::consensus_decode_from_finite_reader(r.take(MAX_MSG_SIZE as u64).by_ref())
+    }
+}
+
+impl Decodable for RawNetworkMessage {
+    fn consensus_decode_from_finite_reader<R: io::Read + ?Sized>(
+        r: &mut R,
+    ) -> Result<Self, encode::Error> {
+        let magic = Decodable::consensus_decode_from_finite_reader(r)?;
+        let cmd = CommandString::consensus_decode_from_finite_reader(r)?;
+        let raw_payload = CheckedData::consensus_decode_from_finite_reader(r)?.0;
+
+        let mut mem_d = io::Cursor::new(raw_payload);
+        let payload = match &cmd.0[..] {
+            "version" =>
+                NetworkMessage::Version(Decodable::consensus_decode_from_finite_reader(&mut mem_d)?),
+            "verack" => NetworkMessage::Verack,
+            "addr" =>
+                NetworkMessage::Addr(Decodable::consensus_decode_from_finite_reader(&mut mem_d)?),
+            "inv" =>
+                NetworkMessage::Inv(Decodable::consensus_decode_from_finite_reader(&mut mem_d)?),
+            "getdata" =>
+                NetworkMessage::GetData(Decodable::consensus_decode_from_finite_reader(&mut mem_d)?),
+            "notfound" => NetworkMessage::NotFound(Decodable::consensus_decode_from_finite_reader(
+                &mut mem_d,
+            )?),
+            "getblocks" => NetworkMessage::GetBlocks(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "getheaders" => NetworkMessage::GetHeaders(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "mempool" => NetworkMessage::MemPool,
+            "block" =>
+                NetworkMessage::Block(Decodable::consensus_decode_from_finite_reader(&mut mem_d)?),
+            "headers" => NetworkMessage::Headers(
+                HeaderDeserializationWrapper::consensus_decode_from_finite_reader(&mut mem_d)?.0,
+            ),
+            "sendheaders" => NetworkMessage::SendHeaders,
+            "getaddr" => NetworkMessage::GetAddr,
+            "ping" =>
+                NetworkMessage::Ping(Decodable::consensus_decode_from_finite_reader(&mut mem_d)?),
+            "pong" =>
+                NetworkMessage::Pong(Decodable::consensus_decode_from_finite_reader(&mut mem_d)?),
+            "merkleblock" => NetworkMessage::MerkleBlock(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "filterload" => NetworkMessage::FilterLoad(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "filteradd" => NetworkMessage::FilterAdd(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "filterclear" => NetworkMessage::FilterClear,
+            "tx" => NetworkMessage::Tx(Decodable::consensus_decode_from_finite_reader(&mut mem_d)?),
+            "getcfilters" => NetworkMessage::GetCFilters(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "cfilter" =>
+                NetworkMessage::CFilter(Decodable::consensus_decode_from_finite_reader(&mut mem_d)?),
+            "getcfheaders" => NetworkMessage::GetCFHeaders(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "cfheaders" => NetworkMessage::CFHeaders(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "getcfcheckpt" => NetworkMessage::GetCFCheckpt(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "cfcheckpt" => NetworkMessage::CFCheckpt(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "reject" =>
+                NetworkMessage::Reject(Decodable::consensus_decode_from_finite_reader(&mut mem_d)?),
+            "alert" =>
+                NetworkMessage::Alert(Decodable::consensus_decode_from_finite_reader(&mut mem_d)?),
+            "feefilter" => NetworkMessage::FeeFilter(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "sendcmpct" => NetworkMessage::SendCmpct(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "cmpctblock" => NetworkMessage::CmpctBlock(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "getblocktxn" => NetworkMessage::GetBlockTxn(
+                Decodable::consensus_decode_from_finite_reader(&mut mem_d)?,
+            ),
+            "blocktxn" => NetworkMessage::BlockTxn(Decodable::consensus_decode_from_finite_reader(
+                &mut mem_d,
+            )?),
+            "wtxidrelay" => NetworkMessage::WtxidRelay,
+            "addrv2" =>
+                NetworkMessage::AddrV2(Decodable::consensus_decode_from_finite_reader(&mut mem_d)?),
+            "sendaddrv2" => NetworkMessage::SendAddrV2,
+            _ => NetworkMessage::Unknown { command: cmd, payload: mem_d.into_inner() },
+        };
+        Ok(RawNetworkMessage { magic, payload })
+    }
+
+    #[inline]
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        Self::consensus_decode_from_finite_reader(r.take(MAX_MSG_SIZE as u64).by_ref())
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use std::net::Ipv4Addr;
+
+    use hashes::hash_x11::Hash as X11Hash;
+    use hashes::sha256d::Hash;
+    use hashes::Hash as HashTrait;
+
+    use super::message_network::{Reject, RejectReason, VersionMessage};
+    use super::{CommandString, NetworkMessage, RawNetworkMessage, *};
+    use crate::bip152::BlockTransactionsRequest;
+    use crate::blockdata::block::{self, Block};
+    use crate::blockdata::script::ScriptBuf;
+    use crate::blockdata::transaction::Transaction;
+    use crate::consensus::encode::{deserialize, deserialize_partial, serialize};
+    use crate::internal_macros::hex;
+    use crate::network::address::{AddrV2, AddrV2Message, Address};
+    use crate::network::constants::{ServiceFlags};
+    use crate::network::message_blockdata::{GetBlocksMessage, GetHeadersMessage, Inventory};
+    use crate::network::message_bloom::{BloomFlags, FilterAdd, FilterLoad};
+    use crate::network::message_compact_blocks::{GetBlockTxn, SendCmpct};
+    use crate::network::message_filter::{
+        CFCheckpt, CFHeaders, CFilter, GetCFCheckpt, GetCFHeaders, GetCFilters,
+    };
+
+    fn hash(slice: [u8; 32]) -> Hash { Hash::from_slice(&slice).unwrap() }
+    fn hash_x11(slice: [u8; 32]) -> X11Hash { X11Hash::from_slice(&slice).unwrap() }
+
+    #[test]
+    fn full_round_ser_der_raw_network_message_test() {
+        // TODO: Impl Rand traits here to easily generate random values.
+        let version_msg: VersionMessage = deserialize(&hex!("721101000100000000000000e6e0845300000000010000000000000000000000000000000000ffff0000000000000100000000000000fd87d87eeb4364f22cf54dca59412db7208d47d920cffce83ee8102f5361746f7368693a302e392e39392f2c9f040001")).unwrap();
+        let tx: Transaction = deserialize(&hex!("0100000001a15d57094aa7a21a28cb20b59aab8fc7d1149a3bdbcddba9c622e4f5f6a99ece010000006c493046022100f93bb0e7d8db7bd46e40132d1f8242026e045f03a0efe71bbb8e3f475e970d790221009337cd7f1f929f00cc6ff01f03729b069a7c21b59b1736ddfee5db5946c5da8c0121033b9b137ee87d5a812d6f506efdd37f0affa7ffc310711c06c7f3e097c9447c52ffffffff0100e1f505000000001976a9140389035a9225b3839e2bbf32d826a1e222031fd888ac00000000")).unwrap();
+        let block: Block = deserialize(&include_bytes!("../../tests/data/testnet_block_000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b.raw")[..]).unwrap();
+        let header: block::Header = deserialize(&hex!("010000004ddccd549d28f385ab457e98d1b11ce80bfea2c5ab93015ade4973e400000000bf4473e53794beae34e64fccc471dace6ae544180816f89591894e0f417a914cd74d6e49ffff001d323b3a7b")).unwrap();
+        let script: ScriptBuf =
+            deserialize(&hex!("1976a91431a420903c05a0a7de2de40c9f02ebedbacdc17288ac")).unwrap();
+        let merkle_block: MerkleBlock = deserialize(&hex!("0100000079cda856b143d9db2c1caff01d1aecc8630d30625d10e8b4b8b0000000000000b50cc069d6a3e33e3ff84a5c41d9d3febe7c770fdcc96b2c3ff60abe184f196367291b4d4c86041b8fa45d630100000001b50cc069d6a3e33e3ff84a5c41d9d3febe7c770fdcc96b2c3ff60abe184f19630101")).unwrap();
+        let cmptblock = deserialize(&hex!("00000030d923ad36ff2d955abab07f8a0a6e813bc6e066b973e780c5e36674cad5d1cd1f6e265f2a17a0d35cbe701fe9d06e2c6324cfe135f6233e8b767bfa3fb4479b71115dc562ffff7f2006000000000000000000000000010002000000010000000000000000000000000000000000000000000000000000000000000000ffffffff0302ee00ffffffff0100f9029500000000015100000000")).unwrap();
+        let blocktxn = deserialize(&hex!("2e93c0cff39ff605020072d96bc3a8d20b8447e294d08092351c8583e08d9b5a01020000000001010000000000000000000000000000000000000000000000000000000000000000ffffffff0402dc0000ffffffff0200f90295000000001976a9142b4569203694fc997e13f2c0a1383b9e16c77a0d88ac0000000000000000266a24aa21a9ede2f61c3f71d1defd3fa999dfa36953755c690689799962b48bebd836974e8cf90120000000000000000000000000000000000000000000000000000000000000000000000000")).unwrap();
+
+        let msgs = vec![
+            NetworkMessage::Version(version_msg),
+            NetworkMessage::Verack,
+            NetworkMessage::Addr(vec![(
+                45,
+                Address::new(&([123, 255, 000, 100], 833).into(), ServiceFlags::NETWORK),
+            )]),
+            NetworkMessage::Inv(vec![Inventory::Block(hash_x11([8u8; 32]).into())]),
+            NetworkMessage::GetData(vec![Inventory::Transaction(hash([45u8; 32]).into())]),
+            NetworkMessage::NotFound(vec![Inventory::Error]),
+            NetworkMessage::GetBlocks(GetBlocksMessage::new(
+                vec![hash_x11([1u8; 32]).into(), hash_x11([4u8; 32]).into()],
+                hash_x11([5u8; 32]).into(),
+            )),
+            NetworkMessage::GetHeaders(GetHeadersMessage::new(
+                vec![hash_x11([10u8; 32]).into(), hash_x11([40u8; 32]).into()],
+                hash_x11([50u8; 32]).into(),
+            )),
+            NetworkMessage::MemPool,
+            NetworkMessage::Tx(tx),
+            NetworkMessage::Block(block),
+            NetworkMessage::Headers(vec![header]),
+            NetworkMessage::SendHeaders,
+            NetworkMessage::GetAddr,
+            NetworkMessage::Ping(15),
+            NetworkMessage::Pong(23),
+            NetworkMessage::MerkleBlock(merkle_block),
+            NetworkMessage::FilterLoad(FilterLoad {
+                filter: hex!("03614e9b050000000000000001"),
+                hash_funcs: 1,
+                tweak: 2,
+                flags: BloomFlags::All,
+            }),
+            NetworkMessage::FilterAdd(FilterAdd { data: script.as_bytes().to_vec() }),
+            NetworkMessage::FilterAdd(FilterAdd {
+                data: hash([29u8; 32]).as_byte_array().to_vec(),
+            }),
+            NetworkMessage::FilterClear,
+            NetworkMessage::GetCFilters(GetCFilters {
+                filter_type: 2,
+                start_height: 52,
+                stop_hash: hash_x11([42u8; 32]).into(),
+            }),
+            NetworkMessage::CFilter(CFilter {
+                filter_type: 7,
+                block_hash: hash_x11([25u8; 32]).into(),
+                filter: vec![1, 2, 3],
+            }),
+            NetworkMessage::GetCFHeaders(GetCFHeaders {
+                filter_type: 4,
+                start_height: 102,
+                stop_hash: hash_x11([47u8; 32]).into(),
+            }),
+            NetworkMessage::CFHeaders(CFHeaders {
+                filter_type: 13,
+                stop_hash: hash_x11([53u8; 32]).into(),
+                previous_filter_header: hash([12u8; 32]).into(),
+                filter_hashes: vec![hash([4u8; 32]).into(), hash([12u8; 32]).into()],
+            }),
+            NetworkMessage::GetCFCheckpt(GetCFCheckpt {
+                filter_type: 17,
+                stop_hash: hash_x11([25u8; 32]).into(),
+            }),
+            NetworkMessage::CFCheckpt(CFCheckpt {
+                filter_type: 27,
+                stop_hash: hash_x11([77u8; 32]).into(),
+                filter_headers: vec![hash([3u8; 32]).into(), hash([99u8; 32]).into()],
+            }),
+            NetworkMessage::Alert(vec![45, 66, 3, 2, 6, 8, 9, 12, 3, 130]),
+            NetworkMessage::Reject(Reject {
+                message: "Test reject".into(),
+                ccode: RejectReason::Duplicate,
+                reason: "Cause".into(),
+                hash: hash_x11([255u8; 32]),
+            }),
+            NetworkMessage::FeeFilter(1000),
+            NetworkMessage::WtxidRelay,
+            NetworkMessage::AddrV2(vec![AddrV2Message {
+                addr: AddrV2::Ipv4(Ipv4Addr::new(127, 0, 0, 1)),
+                port: 0,
+                services: ServiceFlags::NONE,
+                time: 0,
+            }]),
+            NetworkMessage::SendAddrV2,
+            NetworkMessage::CmpctBlock(cmptblock),
+            NetworkMessage::GetBlockTxn(GetBlockTxn {
+                txs_request: BlockTransactionsRequest {
+                    block_hash: hash_x11([11u8; 32]).into(),
+                    indexes: vec![0, 1, 2, 3, 10, 3002],
+                },
+            }),
+            NetworkMessage::BlockTxn(blocktxn),
+            NetworkMessage::SendCmpct(SendCmpct { send_compact: true, version: 8333 }),
+        ];
+
+        for msg in msgs {
+            let raw_msg =
+                RawNetworkMessage { magic: u32::from_le_bytes([57, 0, 0, 0]), payload: msg };
+            assert_eq!(deserialize::<RawNetworkMessage>(&serialize(&raw_msg)).unwrap(), raw_msg);
+        }
+    }
+
+    #[test]
+    fn commandstring_test() {
+        // Test converting.
+        assert_eq!(
+            CommandString::try_from_static("AndrewAndrew").unwrap().as_ref(),
+            "AndrewAndrew"
+        );
+        assert!(CommandString::try_from_static("AndrewAndrewA").is_err());
+
+        // Test serializing.
+        let cs = CommandString("Andrew".into());
+        assert_eq!(serialize(&cs), vec![0x41u8, 0x6e, 0x64, 0x72, 0x65, 0x77, 0, 0, 0, 0, 0, 0]);
+
+        // Test deserializing
+        let cs: Result<CommandString, _> =
+            deserialize(&[0x41u8, 0x6e, 0x64, 0x72, 0x65, 0x77, 0, 0, 0, 0, 0, 0]);
+        assert!(cs.is_ok());
+        assert_eq!(cs.as_ref().unwrap().to_string(), "Andrew".to_owned());
+        assert_eq!(cs.unwrap(), CommandString::try_from_static("Andrew").unwrap());
+
+        let short_cs: Result<CommandString, _> =
+            deserialize(&[0x41u8, 0x6e, 0x64, 0x72, 0x65, 0x77, 0, 0, 0, 0, 0]);
+        assert!(short_cs.is_err());
+    }
+
+    #[test]
+    #[rustfmt::skip]
+    fn serialize_verack_test() {
+        assert_eq!(serialize(&RawNetworkMessage { magic: 0xd9b4bef9, payload: NetworkMessage::Verack }),
+                   vec![0xf9, 0xbe, 0xb4, 0xd9, 0x76, 0x65, 0x72, 0x61,
+                        0x63, 0x6B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                        0x00, 0x00, 0x00, 0x00, 0x5d, 0xf6, 0xe0, 0xe2]);
+    }
+
+    #[test]
+    #[rustfmt::skip]
+    fn serialize_ping_test() {
+        assert_eq!(serialize(&RawNetworkMessage { magic: 0xd9b4bef9, payload: NetworkMessage::Ping(100) }),
+                   vec![0xf9, 0xbe, 0xb4, 0xd9, 0x70, 0x69, 0x6e, 0x67,
+                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                        0x08, 0x00, 0x00, 0x00, 0x24, 0x67, 0xf1, 0x1d,
+                        0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
+    }
+
+    #[test]
+    #[rustfmt::skip]
+    fn serialize_mempool_test() {
+        assert_eq!(serialize(&RawNetworkMessage { magic: 0xd9b4bef9, payload: NetworkMessage::MemPool }),
+                   vec![0xf9, 0xbe, 0xb4, 0xd9, 0x6d, 0x65, 0x6d, 0x70,
+                        0x6f, 0x6f, 0x6c, 0x00, 0x00, 0x00, 0x00, 0x00,
+                        0x00, 0x00, 0x00, 0x00, 0x5d, 0xf6, 0xe0, 0xe2]);
+    }
+
+    #[test]
+    #[rustfmt::skip]
+    fn serialize_getaddr_test() {
+        assert_eq!(serialize(&RawNetworkMessage { magic: 0xd9b4bef9, payload: NetworkMessage::GetAddr }),
+                   vec![0xf9, 0xbe, 0xb4, 0xd9, 0x67, 0x65, 0x74, 0x61,
+                        0x64, 0x64, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00,
+                        0x00, 0x00, 0x00, 0x00, 0x5d, 0xf6, 0xe0, 0xe2]);
+    }
+
+    #[test]
+    fn deserialize_getaddr_test() {
+        #[rustfmt::skip]
+            let msg = deserialize(&[
+            0xf9, 0xbe, 0xb4, 0xd9, 0x67, 0x65, 0x74, 0x61,
+            0x64, 0x64, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x5d, 0xf6, 0xe0, 0xe2
+        ]);
+        let preimage = RawNetworkMessage {
+            magic: 0xd9b4bef9,
+            payload: NetworkMessage::GetAddr,
+        };
+        assert!(msg.is_ok());
+        let msg: RawNetworkMessage = msg.unwrap();
+        assert_eq!(preimage.magic, msg.magic);
+        assert_eq!(preimage.payload, msg.payload);
+    }
+
+    #[test]
+    fn deserialize_version_test() {
+        #[rustfmt::skip]
+            let msg = deserialize::<RawNetworkMessage>(&[
+            0xf9, 0xbe, 0xb4, 0xd9, 0x76, 0x65, 0x72, 0x73,
+            0x69, 0x6f, 0x6e, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x66, 0x00, 0x00, 0x00, 0xbe, 0x61, 0xb8, 0x27,
+            0x7f, 0x11, 0x01, 0x00, 0x0d, 0x04, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0xf0, 0x0f, 0x4d, 0x5c,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
+            0x5b, 0xf0, 0x8c, 0x80, 0xb4, 0xbd, 0x0d, 0x04,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0xfa, 0xa9, 0x95, 0x59, 0xcc, 0x68, 0xa1, 0xc1,
+            0x10, 0x2f, 0x53, 0x61, 0x74, 0x6f, 0x73, 0x68,
+            0x69, 0x3a, 0x30, 0x2e, 0x31, 0x37, 0x2e, 0x31,
+            0x2f, 0x93, 0x8c, 0x08, 0x00, 0x01
+        ]);
+
+        assert!(msg.is_ok());
+        let msg = msg.unwrap();
+        assert_eq!(msg.magic, 0xd9b4bef9);
+        if let NetworkMessage::Version(version_msg) = msg.payload {
+            assert_eq!(version_msg.version, 70015);
+            assert_eq!(
+                version_msg.services,
+                ServiceFlags::NETWORK
+                    | ServiceFlags::BLOOM
+                    | ServiceFlags::WITNESS
+                    | ServiceFlags::NETWORK_LIMITED
+            );
+            assert_eq!(version_msg.timestamp, 1548554224);
+            assert_eq!(version_msg.nonce, 13952548347456104954);
+            assert_eq!(version_msg.user_agent, "/Satoshi:0.17.1/");
+            assert_eq!(version_msg.start_height, 560275);
+            assert!(version_msg.relay);
+        } else {
+            panic!("Wrong message type");
+        }
+    }
+
+    #[test]
+    fn deserialize_partial_message_test() {
+        #[rustfmt::skip]
+            let data = [
+            0xf9, 0xbe, 0xb4, 0xd9, 0x76, 0x65, 0x72, 0x73,
+            0x69, 0x6f, 0x6e, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x66, 0x00, 0x00, 0x00, 0xbe, 0x61, 0xb8, 0x27,
+            0x7f, 0x11, 0x01, 0x00, 0x0d, 0x04, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0xf0, 0x0f, 0x4d, 0x5c,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
+            0x5b, 0xf0, 0x8c, 0x80, 0xb4, 0xbd, 0x0d, 0x04,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0xfa, 0xa9, 0x95, 0x59, 0xcc, 0x68, 0xa1, 0xc1,
+            0x10, 0x2f, 0x53, 0x61, 0x74, 0x6f, 0x73, 0x68,
+            0x69, 0x3a, 0x30, 0x2e, 0x31, 0x37, 0x2e, 0x31,
+            0x2f, 0x93, 0x8c, 0x08, 0x00, 0x01, 0x00, 0x00
+        ];
+        let msg = deserialize_partial::<RawNetworkMessage>(&data);
+        assert!(msg.is_ok());
+
+        let (msg, consumed) = msg.unwrap();
+        assert_eq!(consumed, data.to_vec().len() - 2);
+        assert_eq!(msg.magic, 0xd9b4bef9);
+        if let NetworkMessage::Version(version_msg) = msg.payload {
+            assert_eq!(version_msg.version, 70015);
+            assert_eq!(
+                version_msg.services,
+                ServiceFlags::NETWORK
+                    | ServiceFlags::BLOOM
+                    | ServiceFlags::WITNESS
+                    | ServiceFlags::NETWORK_LIMITED
+            );
+            assert_eq!(version_msg.timestamp, 1548554224);
+            assert_eq!(version_msg.nonce, 13952548347456104954);
+            assert_eq!(version_msg.user_agent, "/Satoshi:0.17.1/");
+            assert_eq!(version_msg.start_height, 560275);
+            assert!(version_msg.relay);
+        } else {
+            panic!("Wrong message type");
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/network/message_blockdata.rs b/dash/src/network/message_blockdata.rs
similarity index 72%
rename from src/network/message_blockdata.rs
rename to dash/src/network/message_blockdata.rs
index 940840c0d..6de3e99dc 100644
--- a/src/network/message_blockdata.rs
+++ b/dash/src/network/message_blockdata.rs
@@ -21,15 +21,17 @@
 //! Bitcoin data (blocks and transactions) around.
 //!
 
-use prelude::*;
+use crate::prelude::*;
 
-use io;
+use std::io;
 
 use hashes::sha256d;
 
-use network::constants;
-use consensus::encode::{self, Decodable, Encodable};
-use hash_types::{BlockHash, Txid, Wtxid};
+use crate::network::constants;
+use crate::consensus::encode::{self, Decodable, Encodable};
+use crate::hash_types::{BlockHash, Txid, Wtxid};
+use crate::internal_macros::{impl_consensus_encoding};
+use crate::hashes::Hash;
 
 /// An inventory item.
 #[derive(PartialEq, Eq, Clone, Debug, Copy, Hash, PartialOrd, Ord)]
@@ -40,6 +42,8 @@ pub enum Inventory {
     Transaction(Txid),
     /// Block
     Block(BlockHash),
+    /// Compact Block
+    CompactBlock(BlockHash),
     /// Witness Transaction by Wtxid
     WTx(Wtxid),
     /// Witness Transaction
@@ -52,21 +56,22 @@ pub enum Inventory {
         inv_type: u32,
         /// The hash of the inventory item
         hash: [u8; 32],
-    }
+    },
 }
 
 impl Encodable for Inventory {
     #[inline]
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
         macro_rules! encode_inv {
             ($code:expr, $item:expr) => {
-                u32::consensus_encode(&$code, &mut s)? + $item.consensus_encode(&mut s)?
-            }
+                u32::consensus_encode(&$code, w)? + $item.consensus_encode(w)?
+            };
         }
         Ok(match *self {
-            Inventory::Error => encode_inv!(0, sha256d::Hash::default()),
+            Inventory::Error => encode_inv!(0, sha256d::Hash::all_zeros()),
             Inventory::Transaction(ref t) => encode_inv!(1, t),
             Inventory::Block(ref b) => encode_inv!(2, b),
+            Inventory::CompactBlock(ref b) => encode_inv!(4, b),
             Inventory::WTx(w) => encode_inv!(5, w),
             Inventory::WitnessTransaction(ref t) => encode_inv!(0x40000001, t),
             Inventory::WitnessBlock(ref b) => encode_inv!(0x40000002, b),
@@ -77,19 +82,17 @@ impl Encodable for Inventory {
 
 impl Decodable for Inventory {
     #[inline]
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let inv_type: u32 = Decodable::consensus_decode(&mut d)?;
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let inv_type: u32 = Decodable::consensus_decode(r)?;
         Ok(match inv_type {
             0 => Inventory::Error,
-            1 => Inventory::Transaction(Decodable::consensus_decode(&mut d)?),
-            2 => Inventory::Block(Decodable::consensus_decode(&mut d)?),
-            5 => Inventory::WTx(Decodable::consensus_decode(&mut d)?),
-            0x40000001 => Inventory::WitnessTransaction(Decodable::consensus_decode(&mut d)?),
-            0x40000002 => Inventory::WitnessBlock(Decodable::consensus_decode(&mut d)?),
-            tp => Inventory::Unknown {
-                inv_type: tp,
-                hash: Decodable::consensus_decode(&mut d)?,
-            }
+            1 => Inventory::Transaction(Decodable::consensus_decode(r)?),
+            2 => Inventory::Block(Decodable::consensus_decode(r)?),
+            4 => Inventory::CompactBlock(Decodable::consensus_decode(r)?),
+            5 => Inventory::WTx(Decodable::consensus_decode(r)?),
+            0x40000001 => Inventory::WitnessTransaction(Decodable::consensus_decode(r)?),
+            0x40000002 => Inventory::WitnessBlock(Decodable::consensus_decode(r)?),
+            tp => Inventory::Unknown { inv_type: tp, hash: Decodable::consensus_decode(r)? },
         })
     }
 }
@@ -119,7 +122,7 @@ pub struct GetHeadersMessage {
     /// if possible and block 1 otherwise.
     pub locator_hashes: Vec<BlockHash>,
     /// References the header to stop at, or zero to just fetch the maximum 2000 headers
-    pub stop_hash: BlockHash
+    pub stop_hash: BlockHash,
 }
 
 impl GetBlocksMessage {
@@ -152,15 +155,14 @@ impl_consensus_encoding!(GetHeadersMessage, version, locator_hashes, stop_hash);
 mod tests {
     use super::{Vec, GetHeadersMessage, GetBlocksMessage};
 
-    use hashes::hex::FromHex;
-
-    use consensus::encode::{deserialize, serialize};
-    use core::default::Default;
+    use hashes::Hash;
+    use crate::consensus::encode::{deserialize, serialize};
+    use crate::internal_macros::hex;
 
     #[test]
     fn getblocks_message_test() {
-        let from_sat = Vec::from_hex("72110100014a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b0000000000000000000000000000000000000000000000000000000000000000").unwrap();
-        let genhash = Vec::from_hex("4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b").unwrap();
+        let from_sat: Vec<u8> = hex!("72110100014a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b0000000000000000000000000000000000000000000000000000000000000000");
+        let genhash: Vec<u8> = hex!("4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b");
 
         let decode: Result<GetBlocksMessage, _> = deserialize(&from_sat);
         assert!(decode.is_ok());
@@ -168,15 +170,15 @@ mod tests {
         assert_eq!(real_decode.version, 70002);
         assert_eq!(real_decode.locator_hashes.len(), 1);
         assert_eq!(serialize(&real_decode.locator_hashes[0]), genhash);
-        assert_eq!(real_decode.stop_hash, Default::default());
+        assert_eq!(real_decode.stop_hash, Hash::all_zeros());
 
         assert_eq!(serialize(&real_decode), from_sat);
     }
 
     #[test]
     fn getheaders_message_test() {
-        let from_sat = Vec::from_hex("72110100014a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b0000000000000000000000000000000000000000000000000000000000000000").unwrap();
-        let genhash = Vec::from_hex("4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b").unwrap();
+        let from_sat = hex!("72110100014a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b0000000000000000000000000000000000000000000000000000000000000000");
+        let genhash = hex!("4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b");
 
         let decode: Result<GetHeadersMessage, _> = deserialize(&from_sat);
         assert!(decode.is_ok());
@@ -184,7 +186,7 @@ mod tests {
         assert_eq!(real_decode.version, 70002);
         assert_eq!(real_decode.locator_hashes.len(), 1);
         assert_eq!(serialize(&real_decode.locator_hashes[0]), genhash);
-        assert_eq!(real_decode.stop_hash, Default::default());
+        assert_eq!(real_decode.stop_hash, Hash::all_zeros());
 
         assert_eq!(serialize(&real_decode), from_sat);
     }
diff --git a/src/network/message_bloom.rs b/dash/src/network/message_bloom.rs
similarity index 80%
rename from src/network/message_bloom.rs
rename to dash/src/network/message_bloom.rs
index e3307a03e..8d80e516b 100644
--- a/src/network/message_bloom.rs
+++ b/dash/src/network/message_bloom.rs
@@ -3,8 +3,9 @@
 //! This module describes BIP37 Connection Bloom filtering network messages.
 //!
 
-use consensus::encode;
-use consensus::{Decodable, Encodable, ReadExt};
+use crate::consensus::encode;
+use crate::consensus::{Decodable, Encodable, ReadExt};
+use crate::internal_macros::impl_consensus_encoding;
 use std::io;
 
 /// `filterload` message sets the current bloom filter
@@ -34,8 +35,8 @@ pub enum BloomFlags {
 }
 
 impl Encodable for BloomFlags {
-    fn consensus_encode<W: io::Write>(&self, mut e: W) -> Result<usize, io::Error> {
-        e.write_all(&[match self {
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        w.write_all(&[match self {
             BloomFlags::None => 0,
             BloomFlags::All => 1,
             BloomFlags::PubkeyOnly => 2,
@@ -45,8 +46,8 @@ impl Encodable for BloomFlags {
 }
 
 impl Decodable for BloomFlags {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        Ok(match d.read_u8()? {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        Ok(match r.read_u8()? {
             0 => BloomFlags::None,
             1 => BloomFlags::All,
             2 => BloomFlags::PubkeyOnly,
diff --git a/dash/src/network/message_compact_blocks.rs b/dash/src/network/message_compact_blocks.rs
new file mode 100644
index 000000000..8827e5435
--- /dev/null
+++ b/dash/src/network/message_compact_blocks.rs
@@ -0,0 +1,45 @@
+//!
+//! BIP152  Compact Blocks network messages
+//!
+
+use crate::bip152;
+use crate::internal_macros::impl_consensus_encoding;
+
+/// sendcmpct message
+#[derive(PartialEq, Eq, Clone, Debug, Copy, PartialOrd, Ord, Hash)]
+pub struct SendCmpct {
+    /// Request to be send compact blocks.
+    pub send_compact: bool,
+    /// Compact Blocks protocol version number.
+    pub version: u64,
+}
+impl_consensus_encoding!(SendCmpct, send_compact, version);
+
+/// cmpctblock message
+///
+/// Note that the rules for validation before relaying compact blocks is
+/// different from headers and regular block messages. Thus, you shouldn't use
+/// compact blocks when relying on an upstream full node to have validated data
+/// being forwarded to you.
+#[derive(PartialEq, Eq, Clone, Debug, PartialOrd, Ord, Hash)]
+pub struct CmpctBlock {
+    /// The Compact Block.
+    pub compact_block: bip152::HeaderAndShortIds,
+}
+impl_consensus_encoding!(CmpctBlock, compact_block);
+
+/// getblocktxn message
+#[derive(PartialEq, Eq, Clone, Debug, PartialOrd, Ord, Hash)]
+pub struct GetBlockTxn {
+    /// The block transactions request.
+    pub txs_request: bip152::BlockTransactionsRequest,
+}
+impl_consensus_encoding!(GetBlockTxn, txs_request);
+
+/// blocktxn message
+#[derive(PartialEq, Eq, Clone, Debug, PartialOrd, Ord, Hash)]
+pub struct BlockTxn {
+    /// The requested block transactions.
+    pub transactions: bip152::BlockTransactions,
+}
+impl_consensus_encoding!(BlockTxn, transactions);
diff --git a/src/network/message_filter.rs b/dash/src/network/message_filter.rs
similarity index 94%
rename from src/network/message_filter.rs
rename to dash/src/network/message_filter.rs
index 29f8adb2e..1c2726ce8 100644
--- a/src/network/message_filter.rs
+++ b/dash/src/network/message_filter.rs
@@ -1,9 +1,10 @@
-//! Bitcoin Client Side Block Filtering network messages.
+//! Dash Client Side Block Filtering network messages.
 //!
 //! This module describes BIP157 Client Side Block Filtering network messages.
 //!
 
-use hash_types::{BlockHash, FilterHash, FilterHeader};
+use crate::hash_types::{BlockHash, FilterHash, FilterHeader};
+use crate::internal_macros::impl_consensus_encoding;
 
 /// getcfilters message
 #[derive(PartialEq, Eq, Clone, Debug)]
diff --git a/src/network/message_network.rs b/dash/src/network/message_network.rs
similarity index 74%
rename from src/network/message_network.rs
rename to dash/src/network/message_network.rs
index 2f2c97465..ab8d3cde6 100644
--- a/src/network/message_network.rs
+++ b/dash/src/network/message_network.rs
@@ -21,15 +21,14 @@
 //! capabilities.
 //!
 
-use prelude::*;
+use hashes::{hash_x11};
 
-use io;
-
-use network::address::Address;
-use network::constants::{self, ServiceFlags};
-use consensus::{Encodable, Decodable, ReadExt};
-use consensus::encode;
-use hashes::sha256d;
+use crate::consensus::{encode, Decodable, Encodable, ReadExt};
+use crate::internal_macros::impl_consensus_encoding;
+use crate::io;
+use crate::network::address::Address;
+use crate::network::constants::{self, ServiceFlags};
+use crate::prelude::*;
 
 /// Some simple messages
 
@@ -55,7 +54,7 @@ pub struct VersionMessage {
     /// Whether the receiving peer should relay messages to the sender; used
     /// if the sender is bandwidth-limited and would like to support bloom
     /// filtering. Defaults to false.
-    pub relay: bool
+    pub relay: bool,
 }
 
 impl VersionMessage {
@@ -83,9 +82,18 @@ impl VersionMessage {
     }
 }
 
-impl_consensus_encoding!(VersionMessage, version, services, timestamp,
-                         receiver, sender, nonce,
-                         user_agent, start_height, relay);
+impl_consensus_encoding!(
+    VersionMessage,
+    version,
+    services,
+    timestamp,
+    receiver,
+    sender,
+    nonce,
+    user_agent,
+    start_height,
+    relay
+);
 
 /// message rejection reason as a code
 #[derive(PartialEq, Eq, Clone, Copy, Debug)]
@@ -105,19 +113,19 @@ pub enum RejectReason {
     /// insufficient fee
     Fee = 0x42,
     /// checkpoint
-    Checkpoint = 0x43
+    Checkpoint = 0x43,
 }
 
 impl Encodable for RejectReason {
-    fn consensus_encode<W: io::Write>(&self, mut e: W) -> Result<usize, io::Error> {
-        e.write_all(&[*self as u8])?;
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        w.write_all(&[*self as u8])?;
         Ok(1)
     }
 }
 
 impl Decodable for RejectReason {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        Ok(match d.read_u8()? {
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        Ok(match r.read_u8()? {
             0x01 => RejectReason::Malformed,
             0x10 => RejectReason::Invalid,
             0x11 => RejectReason::Obsolete,
@@ -126,7 +134,7 @@ impl Decodable for RejectReason {
             0x41 => RejectReason::Dust,
             0x42 => RejectReason::Fee,
             0x43 => RejectReason::Checkpoint,
-            _ => return Err(encode::Error::ParseFailed("unknown reject code"))
+            _ => return Err(encode::Error::ParseFailed("unknown reject code")),
         })
     }
 }
@@ -141,27 +149,24 @@ pub struct Reject {
     /// reason of rejectection
     pub reason: Cow<'static, str>,
     /// reference to rejected item
-    pub hash: sha256d::Hash
+    pub hash: hash_x11::Hash,
 }
 
 impl_consensus_encoding!(Reject, message, ccode, reason, hash);
 
 #[cfg(test)]
 mod tests {
-    use super::VersionMessage;
-    use super::Reject;
-    use super::RejectReason;
-
-    use hashes::hex::FromHex;
-    use hashes::sha256d::Hash;
-    use network::constants::ServiceFlags;
+    use hashes::{hash_x11};
 
-    use consensus::encode::{deserialize, serialize};
+    use super::{Reject, RejectReason, VersionMessage};
+    use crate::consensus::encode::{deserialize, serialize};
+    use crate::internal_macros::hex;
+    use crate::network::constants::ServiceFlags;
 
     #[test]
     fn version_message_test() {
         // This message is from my satoshi node, morning of May 27 2014
-        let from_sat = Vec::from_hex("721101000100000000000000e6e0845300000000010000000000000000000000000000000000ffff0000000000000100000000000000fd87d87eeb4364f22cf54dca59412db7208d47d920cffce83ee8102f5361746f7368693a302e392e39392f2c9f040001").unwrap();
+        let from_sat = hex!("721101000100000000000000e6e0845300000000010000000000000000000000000000000000ffff0000000000000100000000000000fd87d87eeb4364f22cf54dca59412db7208d47d920cffce83ee8102f5361746f7368693a302e392e39392f2c9f040001");
 
         let decode: Result<VersionMessage, _> = deserialize(&from_sat);
         assert!(decode.is_ok());
@@ -173,15 +178,15 @@ mod tests {
         assert_eq!(real_decode.nonce, 16735069437859780935);
         assert_eq!(real_decode.user_agent, "/Satoshi:0.9.99/".to_string());
         assert_eq!(real_decode.start_height, 302892);
-        assert_eq!(real_decode.relay, true);
+        assert!(real_decode.relay);
 
         assert_eq!(serialize(&real_decode), from_sat);
     }
 
     #[test]
     fn reject_message_test() {
-        let reject_tx_conflict = Vec::from_hex("027478121474786e2d6d656d706f6f6c2d636f6e666c69637405df54d3860b3c41806a3546ab48279300affacf4b88591b229141dcf2f47004").unwrap();
-        let reject_tx_nonfinal = Vec::from_hex("02747840096e6f6e2d66696e616c259bbe6c83db8bbdfca7ca303b19413dc245d9f2371b344ede5f8b1339a5460b").unwrap();
+        let reject_tx_conflict = hex!("027478121474786e2d6d656d706f6f6c2d636f6e666c69637405df54d3860b3c41806a3546ab48279300affacf4b88591b229141dcf2f47004");
+        let reject_tx_nonfinal = hex!("02747840096e6f6e2d66696e616c259bbe6c83db8bbdfca7ca303b19413dc245d9f2371b344ede5f8b1339a5460b");
 
         let decode_result_conflict: Result<Reject, _> = deserialize(&reject_tx_conflict);
         let decode_result_nonfinal: Result<Reject, _> = deserialize(&reject_tx_nonfinal);
@@ -194,7 +199,9 @@ mod tests {
         assert_eq!(RejectReason::Duplicate, conflict.ccode);
         assert_eq!("txn-mempool-conflict", conflict.reason);
         assert_eq!(
-            Hash::from_hex("0470f4f2dc4191221b59884bcffaaf00932748ab46356a80413c0b86d354df05").unwrap(),
+            "0470f4f2dc4191221b59884bcffaaf00932748ab46356a80413c0b86d354df05"
+                .parse::<hash_x11::Hash>()
+                .unwrap(),
             conflict.hash
         );
 
@@ -203,7 +210,9 @@ mod tests {
         assert_eq!(RejectReason::NonStandard, nonfinal.ccode);
         assert_eq!("non-final", nonfinal.reason);
         assert_eq!(
-            Hash::from_hex("0b46a539138b5fde4e341b37f2d945c23d41193b30caa7fcbd8bdb836cbe9b25").unwrap(),
+            "0b46a539138b5fde4e341b37f2d945c23d41193b30caa7fcbd8bdb836cbe9b25"
+                .parse::<hash_x11::Hash>()
+                .unwrap(),
             nonfinal.hash
         );
 
diff --git a/src/network/mod.rs b/dash/src/network/mod.rs
similarity index 82%
rename from src/network/mod.rs
rename to dash/src/network/mod.rs
index a06ec3821..7c6d84dda 100644
--- a/src/network/mod.rs
+++ b/dash/src/network/mod.rs
@@ -21,36 +21,28 @@
 //! of Bitcoin data and network messages.
 //!
 
-use io;
+use crate::io;
 use core::fmt;
 #[cfg(feature = "std")] use std::error;
 
 pub mod constants;
 
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 pub mod address;
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 pub use self::address::Address;
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 pub mod message;
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 pub mod message_blockdata;
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 pub mod message_bloom;
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 pub mod message_network;
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 pub mod message_filter;
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-pub mod stream_reader;
+pub mod message_compact_blocks;
 
 /// Network error
 #[derive(Debug)]
@@ -81,7 +73,6 @@ impl From<io::Error> for Error {
 }
 
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 impl error::Error for Error {
     fn cause(&self) -> Option<&dyn error::Error> {
         match *self {
diff --git a/dash/src/parse.rs b/dash/src/parse.rs
new file mode 100644
index 000000000..4da004280
--- /dev/null
+++ b/dash/src/parse.rs
@@ -0,0 +1,172 @@
+use core::convert::TryFrom;
+use core::fmt;
+use core::str::FromStr;
+
+use internals::write_err;
+
+use crate::error::impl_std_error;
+use crate::prelude::*;
+
+/// Error with rich context returned when a string can't be parsed as an integer.
+///
+/// This is an extension of [`core::num::ParseIntError`], which carries the input that failed to
+/// parse as well as type information. As a result it provides very informative error messages that
+/// make it easier to understand the problem and correct mistakes.
+///
+/// Note that this is larger than the type from `core` so if it's passed through a deep call stack
+/// in a performance-critical application you may want to box it or throw away the context by
+/// converting to `core` type.
+#[derive(Debug, Clone, Eq, PartialEq)]
+pub struct ParseIntError {
+    input: String,
+    // for displaying - see Display impl with nice error message below
+    bits: u8,
+    // We could represent this as a single bit but it wouldn't actually derease the cost of moving
+    // the struct because String contains pointers so there will be padding of bits at least
+    // pointer_size - 1 bytes: min 1B in practice.
+    is_signed: bool,
+    source: core::num::ParseIntError,
+}
+
+impl ParseIntError {
+    /// Returns the input that was attempted to be parsed.
+    pub fn input(&self) -> &str { &self.input }
+}
+
+impl From<ParseIntError> for core::num::ParseIntError {
+    fn from(value: ParseIntError) -> Self { value.source }
+}
+
+impl AsRef<core::num::ParseIntError> for ParseIntError {
+    fn as_ref(&self) -> &core::num::ParseIntError { &self.source }
+}
+
+impl fmt::Display for ParseIntError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let signed = if self.is_signed { "signed" } else { "unsigned" };
+        let n = if self.bits == 8 { "n" } else { "" };
+        write_err!(f, "failed to parse '{}' as a{} {}-bit {} integer", self.input, n, self.bits, signed; self.source)
+    }
+}
+
+/// Not strictly neccessary but serves as a lint - avoids weird behavior if someone accidentally
+/// passes non-integer to the `parse()` function.
+pub(crate) trait Integer:
+    FromStr<Err = core::num::ParseIntError> + TryFrom<i8> + Sized
+{
+}
+
+macro_rules! impl_integer {
+    ($($type:ty),* $(,)?) => {
+        $(
+        impl Integer for $type {}
+        )*
+    }
+}
+
+impl_integer!(u8, i8, u16, i16, u32, i32, u64, i64, u128, i128);
+
+/// Parses the input string as an integer returning an error carrying rich context.
+///
+/// If the caller owns `String` or `Box<str>` which is not used later it's better to pass it as
+/// owned since it avoids allocation in error case.
+pub(crate) fn int<T: Integer, S: AsRef<str> + Into<String>>(s: S) -> Result<T, ParseIntError> {
+    s.as_ref().parse().map_err(|error| {
+        ParseIntError {
+            input: s.into(),
+            bits: u8::try_from(core::mem::size_of::<T>() * 8).expect("max is 128 bits for u128"),
+            // We detect if the type is signed by checking if -1 can be represented by it
+            // this way we don't have to implement special traits and optimizer will get rid of the
+            // computation.
+            is_signed: T::try_from(-1i8).is_ok(),
+            source: error,
+        }
+    })
+}
+
+pub(crate) fn hex_u32<S: AsRef<str> + Into<String>>(s: S) -> Result<u32, ParseIntError> {
+    u32::from_str_radix(s.as_ref(), 16).map_err(|error| ParseIntError {
+        input: s.into(),
+        bits: u8::try_from(core::mem::size_of::<u32>() * 8).expect("max is 32 bits for u32"),
+        is_signed: u32::try_from(-1i8).is_ok(),
+        source: error,
+    })
+}
+
+impl_std_error!(ParseIntError, source);
+
+/// Implements `TryFrom<$from> for $to` using `parse::int`, mapping the output using infallible
+/// conversion function `fn`.
+macro_rules! impl_tryfrom_str_from_int_infallible {
+    ($($from:ty, $to:ident, $inner:ident, $fn:ident);*) => {
+        $(
+        impl core::convert::TryFrom<$from> for $to {
+            type Error = $crate::error::ParseIntError;
+
+            fn try_from(s: $from) -> Result<Self, Self::Error> {
+                $crate::parse::int::<$inner, $from>(s).map($to::$fn)
+            }
+        }
+        )*
+    }
+}
+pub(crate) use impl_tryfrom_str_from_int_infallible;
+
+/// Implements `FromStr` and `TryFrom<{&str, String, Box<str>}> for $to` using `parse::int`, mapping
+/// the output using infallible conversion function `fn`.
+///
+/// The `Error` type is `ParseIntError`
+macro_rules! impl_parse_str_from_int_infallible {
+    ($to:ident, $inner:ident, $fn:ident) => {
+        $crate::parse::impl_tryfrom_str_from_int_infallible!(&str, $to, $inner, $fn; String, $to, $inner, $fn; Box<str>, $to, $inner, $fn);
+
+        impl core::str::FromStr for $to {
+            type Err = $crate::error::ParseIntError;
+
+            fn from_str(s: &str) -> Result<Self, Self::Err> {
+                $crate::parse::int::<$inner, &str>(s).map($to::$fn)
+            }
+        }
+
+    }
+}
+pub(crate) use impl_parse_str_from_int_infallible;
+
+/// Implements `TryFrom<$from> for $to` using `parse::int`, mapping the output using fallible
+/// conversion function `fn`.
+macro_rules! impl_tryfrom_str_from_int_fallible {
+    ($($from:ty, $to:ident, $inner:ident, $fn:ident, $err:ident);*) => {
+        $(
+        impl core::convert::TryFrom<$from> for $to {
+            type Error = $err;
+
+            fn try_from(s: $from) -> Result<Self, Self::Error> {
+                let u = $crate::parse::int::<$inner, $from>(s)?;
+                $to::$fn(u)
+            }
+        }
+        )*
+    }
+}
+pub(crate) use impl_tryfrom_str_from_int_fallible;
+
+/// Implements `FromStr` and `TryFrom<{&str, String, Box<str>}> for $to` using `parse::int`, mapping
+/// the output using fallible conversion function `fn`.
+///
+/// The `Error` type is `ParseIntError`
+macro_rules! impl_parse_str_from_int_fallible {
+    ($to:ident, $inner:ident, $fn:ident, $err:ident) => {
+        $crate::parse::impl_tryfrom_str_from_int_fallible!(&str, $to, $inner, $fn, $err; String, $to, $inner, $fn, $err; Box<str>, $to, $inner, $fn, $err);
+
+        impl core::str::FromStr for $to {
+            type Err = $err;
+
+            fn from_str(s: &str) -> Result<Self, Self::Err> {
+                let u = $crate::parse::int::<$inner, &str>(s)?;
+                $to::$fn(u)
+            }
+        }
+
+    }
+}
+pub(crate) use impl_parse_str_from_int_fallible;
diff --git a/src/policy.rs b/dash/src/policy.rs
similarity index 100%
rename from src/policy.rs
rename to dash/src/policy.rs
diff --git a/dash/src/pow.rs b/dash/src/pow.rs
new file mode 100644
index 000000000..cdb5f9518
--- /dev/null
+++ b/dash/src/pow.rs
@@ -0,0 +1,1705 @@
+// Rust Bitcoin Library - Written by the rust-dash developers.
+// SPDX-License-Identifier: CC0-1.0
+
+//! Proof-of-work related integer types.
+//!
+//! Provides the [`Work`] and [`Target`] types that are use in proof-of-work calculations. The
+//! functions here are designed to be fast, by that we mean it is safe to use them to check headers.
+//!
+
+use core::fmt::{self, LowerHex, UpperHex};
+use core::ops::{Add, Div, Mul, Not, Rem, Shl, Shr, Sub};
+
+#[cfg(all(test, mutate))]
+use mutagen::mutate;
+
+use crate::consensus::encode::{self, Decodable, Encodable};
+#[cfg(doc)]
+use crate::consensus::Params;
+use crate::hash_types::BlockHash;
+use crate::io::{self, Read, Write};
+use crate::prelude::String;
+use crate::string::FromHexStr;
+
+/// Implement traits and methods shared by `Target` and `Work`.
+macro_rules! do_impl {
+    ($ty:ident) => {
+        impl $ty {
+            /// Creates `Self` from a big-endian byte array.
+            #[inline]
+            pub fn from_be_bytes(bytes: [u8; 32]) -> $ty { $ty(U256::from_be_bytes(bytes)) }
+
+            /// Creates `Self` from a little-endian byte array.
+            #[inline]
+            pub fn from_le_bytes(bytes: [u8; 32]) -> $ty { $ty(U256::from_le_bytes(bytes)) }
+
+            /// Converts `self` to a big-endian byte array.
+            #[inline]
+            pub fn to_be_bytes(self) -> [u8; 32] { self.0.to_be_bytes() }
+
+            /// Converts `self` to a little-endian byte array.
+            #[inline]
+            pub fn to_le_bytes(self) -> [u8; 32] { self.0.to_le_bytes() }
+        }
+
+        impl fmt::Display for $ty {
+            #[inline]
+            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(&self.0, f) }
+        }
+
+        impl fmt::LowerHex for $ty {
+            #[inline]
+            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::LowerHex::fmt(&self.0, f) }
+        }
+
+        impl fmt::UpperHex for $ty {
+            #[inline]
+            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::UpperHex::fmt(&self.0, f) }
+        }
+    };
+}
+
+/// A 256 bit integer representing work.
+///
+/// Work is a measure of how difficult it is to find a hash below a given [`Target`].
+///
+/// ref: <https://en.bitcoin.it/wiki/Work>
+#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Work(U256);
+
+impl Work {
+    /// Lowest possible work value for Mainnet. See comment on [`Params::pow_limit`] for more info.
+    pub const MAINNET_MIN: Work = Work(U256(0x0000_0000_ffff_0000_0000_0000_0000_0000_u128, 0));
+
+    /// Lowest possible work value for Testnet. See comment on [`Params::pow_limit`] for more info.
+    pub const TESTNET_MIN: Work = Work(U256(0x0000_0000_ffff_0000_0000_0000_0000_0000_u128, 0));
+
+    /// Lowest possible work value for Devnet. See comment on [`Params::pow_limit`] for more info.
+    pub const DEVNET_MIN: Work = Work(U256(0x0000_0377_ae00_0000_0000_0000_0000_0000_u128, 0));
+
+    /// Lowest possible work value for Regtest. See comment on [`Params::pow_limit`] for more info.
+    pub const REGTEST_MIN: Work = Work(U256(0x7fff_ff00_0000_0000_0000_0000_0000_0000_u128, 0));
+
+    /// Converts this [`Work`] to [`Target`].
+    pub fn to_target(self) -> Target { Target(self.0.inverse()) }
+
+    /// Returns log2 of this work.
+    ///
+    /// The result inherently suffers from a loss of precision and is, therefore, meant to be
+    /// used mainly for informative and displaying purposes, similarly to Bitcoin Core's
+    /// `log2_work` output in its logs.
+    #[cfg(feature = "std")]
+    pub fn log2(self) -> f64 { self.0.to_f64().log2() }
+}
+do_impl!(Work);
+
+impl Add for Work {
+    type Output = Work;
+    fn add(self, rhs: Self) -> Self { Work(self.0 + rhs.0) }
+}
+
+impl Sub for Work {
+    type Output = Work;
+    fn sub(self, rhs: Self) -> Self { Work(self.0 - rhs.0) }
+}
+
+/// A 256 bit integer representing target.
+///
+/// The SHA-256 hash of a block's header must be lower than or equal to the current target for the
+/// block to be accepted by the network. The lower the target, the more difficult it is to generate
+/// a block. (See also [`Work`].)
+///
+/// ref: <https://en.bitcoin.it/wiki/Target>
+#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Target(U256);
+
+impl Target {
+    /// When parsing nBits, Bitcoin Core converts a negative target threshold into a target of zero.
+    pub const ZERO: Target = Target(U256::ZERO);
+    /// The maximum possible target.
+    ///
+    /// This value is used to calculate difficulty, which is defined as how difficult the current
+    /// target makes it to find a block relative to how difficult it would be at the highest
+    /// possible target. Remember highest target == lowest difficulty.
+    ///
+    /// ref: <https://en.bitcoin.it/wiki/Target>
+    // In Bitcoind this is ~(u256)0 >> 32 stored as a floating-point type so it gets truncated, hence
+    // the low 208 bits are all zero.
+    pub const MAX: Self = Target(U256(0xFFFF_u128 << (208 - 128), 0));
+
+    /// The maximum possible target (see [`Target::MAX`]).
+    ///
+    /// This is provided for consistency with Rust 1.41.1, newer code should use [`Target::MAX`].
+    pub const fn max_value() -> Self { Target::MAX }
+
+    /// Computes the [`Target`] value from a compact representation.
+    ///
+    /// ref: <https://developer.bitcoin.org/reference/block_chain.html#target-nbits>
+    pub fn from_compact(c: CompactTarget) -> Target {
+        let bits = c.0;
+        // This is a floating-point "compact" encoding originally used by
+        // OpenSSL, which satoshi put into consensus code, so we're stuck
+        // with it. The exponent needs to have 3 subtracted from it, hence
+        // this goofy decoding code. 3 is due to 3 bytes in the mantissa.
+        let (mant, expt) = {
+            let unshifted_expt = bits >> 24;
+            if unshifted_expt <= 3 {
+                ((bits & 0xFFFFFF) >> (8 * (3 - unshifted_expt as usize)), 0)
+            } else {
+                (bits & 0xFFFFFF, 8 * ((bits >> 24) - 3))
+            }
+        };
+
+        // The mantissa is signed but may not be negative.
+        if mant > 0x7F_FFFF {
+            Target::ZERO
+        } else {
+            Target(U256::from(mant) << expt)
+        }
+    }
+
+    /// Computes the compact value from a [`Target`] representation.
+    ///
+    /// The compact form is by definition lossy, this means that
+    /// `t == Target::from_compact(t.to_compact_lossy())` does not always hold.
+    pub fn to_compact_lossy(self) -> CompactTarget {
+        let mut size = (self.0.bits() + 7) / 8;
+        let mut compact = if size <= 3 {
+            (self.0.low_u64() << (8 * (3 - size))) as u32
+        } else {
+            let bn = self.0 >> (8 * (size - 3));
+            bn.low_u32()
+        };
+
+        if (compact & 0x0080_0000) != 0 {
+            compact >>= 8;
+            size += 1;
+        }
+
+        CompactTarget(compact | (size << 24))
+    }
+
+    /// Returns true if block hash is less than or equal to this [`Target`].
+    ///
+    /// Proof-of-work validity for a block requires the hash of the block to be less than or equal
+    /// to the target.
+    #[cfg_attr(all(test, mutate), mutate)]
+    pub fn is_met_by(&self, hash: BlockHash) -> bool {
+        use hashes::Hash;
+        let hash = U256::from_le_bytes(hash.to_byte_array());
+        hash <= self.0
+    }
+
+    /// Converts this [`Target`] to [`Work`].
+    ///
+    /// "Work" is defined as the work done to mine a block with this target value (recorded in the
+    /// block header in compact form as nBits). This is not the same as the difficulty to mine a
+    /// block with this target (see `Self::difficulty`).
+    pub fn to_work(self) -> Work { Work(self.0.inverse()) }
+
+    /// Computes the popular "difficulty" measure for mining.
+    ///
+    /// Difficulty represents how difficult the current target makes it to find a block, relative to
+    /// how difficult it would be at the highest possible target (highest target == lowest difficulty).
+    ///
+    /// For example, a difficulty of 6,695,826 means that at a given hash rate, it will, on average,
+    /// take ~6.6 million times as long to find a valid block as it would at a difficulty of 1, or
+    /// alternatively, it will take, again on average, ~6.6 million times as many hashes to find a
+    /// valid block
+    ///
+    /// # Note
+    ///
+    /// Difficulty is calculated using the following algorithm `max / current` where [max] is
+    /// defined for the Bitcoin network and `current` is the current [target] for this block. As
+    /// such, a low target implies a high difficulty. Since [`Target`] is represented as a 256 bit
+    /// integer but `difficulty()` returns only 128 bits this means for targets below approximately
+    /// `0xffff_ffff_ffff_ffff_ffff_ffff` `difficulty()` will saturate at `u128::MAX`.
+    ///
+    /// [max]: Target::max
+    /// [target]: crate::blockdata::block::Header::target
+    #[cfg_attr(all(test, mutate), mutate)]
+    pub fn difficulty(&self) -> u128 {
+        let d = Target::MAX.0 / self.0;
+        d.saturating_to_u128()
+    }
+
+    /// Computes the popular "difficulty" measure for mining and returns a float value of f64.
+    ///
+    /// See [`difficulty`] for details.
+    ///
+    /// [`difficulty`]: Target::difficulty
+    #[cfg_attr(all(test, mutate), mutate)]
+    pub fn difficulty_float(&self) -> f64 { TARGET_MAX_F64 / self.0.to_f64() }
+}
+do_impl!(Target);
+
+/// Encoding of 256-bit target as 32-bit float.
+///
+/// This is used to encode a target into the block header. Satoshi made this part of consensus code
+/// in the original version of Bitcoin, likely copying an idea from OpenSSL.
+///
+/// OpenSSL's bignum (BN) type has an encoding, which is even called "compact" as in dash, which
+/// is exactly this format.
+#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct CompactTarget(u32);
+
+impl CompactTarget {
+    /// Creates a [`CompactTarget`] from a consensus encoded `u32`.
+    pub fn from_consensus(bits: u32) -> Self { Self(bits) }
+
+    /// Returns the consensus encoded `u32` representation of this [`CompactTarget`].
+    pub fn to_consensus(self) -> u32 { self.0 }
+}
+
+impl From<CompactTarget> for Target {
+    fn from(c: CompactTarget) -> Self { Target::from_compact(c) }
+}
+
+impl FromHexStr for CompactTarget {
+    type Error = crate::parse::ParseIntError;
+
+    fn from_hex_str_no_prefix<S: AsRef<str> + Into<String>>(s: S) -> Result<Self, Self::Error> {
+        let compact_target = crate::parse::hex_u32(s)?;
+        Ok(Self::from_consensus(compact_target))
+    }
+}
+
+impl Encodable for CompactTarget {
+    #[inline]
+    fn consensus_encode<W: Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        self.0.consensus_encode(w)
+    }
+}
+
+impl Decodable for CompactTarget {
+    #[inline]
+    fn consensus_decode<R: Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        u32::consensus_decode(r).map(CompactTarget)
+    }
+}
+
+/// Big-endian 256 bit integer type.
+// (high, low): u.0 contains the high bits, u.1 contains the low bits.
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Default)]
+struct U256(u128, u128);
+
+impl U256 {
+    const MAX: U256 =
+        U256(0xffff_ffff_ffff_ffff_ffff_ffff_ffff_ffff, 0xffff_ffff_ffff_ffff_ffff_ffff_ffff_ffff);
+
+    const ZERO: U256 = U256(0, 0);
+
+    const ONE: U256 = U256(0, 1);
+
+    /// Creates [`U256`] from a big-endian array of `u8`s.
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn from_be_bytes(a: [u8; 32]) -> U256 {
+        let (high, low) = split_in_half(a);
+        let big = u128::from_be_bytes(high);
+        let little = u128::from_be_bytes(low);
+        U256(big, little)
+    }
+
+    /// Creates a [`U256`] from a little-endian array of `u8`s.
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn from_le_bytes(a: [u8; 32]) -> U256 {
+        let (high, low) = split_in_half(a);
+        let little = u128::from_le_bytes(high);
+        let big = u128::from_le_bytes(low);
+        U256(big, little)
+    }
+
+    /// Converts `Self` to a big-endian array of `u8`s.
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn to_be_bytes(self) -> [u8; 32] {
+        let mut out = [0; 32];
+        out[..16].copy_from_slice(&self.0.to_be_bytes());
+        out[16..].copy_from_slice(&self.1.to_be_bytes());
+        out
+    }
+
+    /// Converts `Self` to a little-endian array of `u8`s.
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn to_le_bytes(self) -> [u8; 32] {
+        let mut out = [0; 32];
+        out[..16].copy_from_slice(&self.1.to_le_bytes());
+        out[16..].copy_from_slice(&self.0.to_le_bytes());
+        out
+    }
+
+    /// Calculates 2^256 / (x + 1) where x is a 256 bit unsigned integer.
+    ///
+    /// 2**256 / (x + 1) == ~x / (x + 1) + 1
+    ///
+    /// (Equation shamelessly stolen from bitcoind)
+    fn inverse(&self) -> U256 {
+        // We should never have a target/work of zero so this doesn't matter
+        // that much but we define the inverse of 0 as max.
+        if self.is_zero() {
+            return U256::MAX;
+        }
+        // We define the inverse of 1 as max.
+        if self.is_one() {
+            return U256::MAX;
+        }
+        // We define the inverse of max as 1.
+        if self.is_max() {
+            return U256::ONE;
+        }
+
+        let ret = !*self / self.wrapping_inc();
+        ret.wrapping_inc()
+    }
+
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn is_zero(&self) -> bool { self.0 == 0 && self.1 == 0 }
+
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn is_one(&self) -> bool { self.0 == 0 && self.1 == 1 }
+
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn is_max(&self) -> bool { self.0 == u128::max_value() && self.1 == u128::max_value() }
+
+    /// Returns the low 32 bits.
+    fn low_u32(&self) -> u32 { self.low_u128() as u32 }
+
+    /// Returns the low 64 bits.
+    fn low_u64(&self) -> u64 { self.low_u128() as u64 }
+
+    /// Returns the low 128 bits.
+    fn low_u128(&self) -> u128 { self.1 }
+
+    /// Returns `self` as a `u128` saturating to `u128::MAX` if `self` is too big.
+    // Matagen gives false positive because >= and > both return u128::MAX
+    fn saturating_to_u128(&self) -> u128 {
+        if *self > U256::from(u128::max_value()) {
+            u128::max_value()
+        } else {
+            self.low_u128()
+        }
+    }
+
+    /// Returns the least number of bits needed to represent the number.
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn bits(&self) -> u32 {
+        if self.0 > 0 {
+            256 - self.0.leading_zeros()
+        } else {
+            128 - self.1.leading_zeros()
+        }
+    }
+
+    /// Wrapping multiplication by `u64`.
+    ///
+    /// # Returns
+    ///
+    /// The multiplication result along with a boolean indicating whether an arithmetic overflow
+    /// occurred. If an overflow occurred then the wrapped value is returned.
+    // mutagen false positive: binop_bit, replace `|` with `^`
+    fn mul_u64(self, rhs: u64) -> (U256, bool) {
+        let mut carry: u128 = 0;
+        let mut split_le =
+            [self.1 as u64, (self.1 >> 64) as u64, self.0 as u64, (self.0 >> 64) as u64];
+
+        for word in &mut split_le {
+            // TODO: Use `carrying_mul` when stabilized: https://github.com/rust-lang/rust/issues/85532
+            // This will not overflow, for proof see https://github.com/rust-bitcoin/rust-bitcoin/pull/1496#issuecomment-1365938572
+            let n = carry + u128::from(rhs) * u128::from(*word);
+
+            *word = n as u64; // Intentional truncation, save the low bits
+            carry = n >> 64; // and carry the high bits.
+        }
+
+        let low = u128::from(split_le[0]) | u128::from(split_le[1]) << 64;
+        let high = u128::from(split_le[2]) | u128::from(split_le[3]) << 64;
+        (Self(high, low), carry != 0)
+    }
+
+    /// Calculates quotient and remainder.
+    ///
+    /// # Returns
+    ///
+    /// (quotient, remainder)
+    ///
+    /// # Panics
+    ///
+    /// If `rhs` is zero.
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn div_rem(self, rhs: Self) -> (Self, Self) {
+        let mut sub_copy = self;
+        let mut shift_copy = rhs;
+        let mut ret = [0u128; 2];
+
+        let my_bits = self.bits();
+        let your_bits = rhs.bits();
+
+        // Check for division by 0
+        assert!(your_bits != 0, "attempted to divide {} by zero", self);
+
+        // Early return in case we are dividing by a larger number than us
+        if my_bits < your_bits {
+            return (U256::ZERO, sub_copy);
+        }
+
+        // Bitwise long division
+        let mut shift = my_bits - your_bits;
+        shift_copy = shift_copy << shift;
+        loop {
+            if sub_copy >= shift_copy {
+                ret[1 - (shift / 128) as usize] |= 1 << (shift % 128);
+                sub_copy = sub_copy.wrapping_sub(shift_copy);
+            }
+            shift_copy = shift_copy >> 1;
+            if shift == 0 {
+                break;
+            }
+            shift -= 1;
+        }
+
+        (U256(ret[0], ret[1]), sub_copy)
+    }
+
+    /// Calculates `self` + `rhs`
+    ///
+    /// Returns a tuple of the addition along with a boolean indicating whether an arithmetic
+    /// overflow would occur. If an overflow would have occurred then the wrapped value is returned.
+    #[must_use = "this returns the result of the operation, without modifying the original"]
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn overflowing_add(self, rhs: Self) -> (Self, bool) {
+        let mut ret = U256::ZERO;
+        let mut ret_overflow = false;
+
+        let (high, overflow) = self.0.overflowing_add(rhs.0);
+        ret.0 = high;
+        ret_overflow |= overflow;
+
+        let (low, overflow) = self.1.overflowing_add(rhs.1);
+        ret.1 = low;
+        if overflow {
+            let (high, overflow) = ret.0.overflowing_add(1);
+            ret.0 = high;
+            ret_overflow |= overflow;
+        }
+
+        (ret, ret_overflow)
+    }
+
+    /// Calculates `self` - `rhs`
+    ///
+    /// Returns a tuple of the subtraction along with a boolean indicating whether an arithmetic
+    /// overflow would occur. If an overflow would have occurred then the wrapped value is returned.
+    #[must_use = "this returns the result of the operation, without modifying the original"]
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn overflowing_sub(self, rhs: Self) -> (Self, bool) {
+        let ret = self.wrapping_add(!rhs).wrapping_add(Self::ONE);
+        let overflow = rhs > self;
+        (ret, overflow)
+    }
+
+    /// Calculates the multiplication of `self` and `rhs`.
+    ///
+    /// Returns a tuple of the multiplication along with a boolean
+    /// indicating whether an arithmetic overflow would occur. If an
+    /// overflow would have occurred then the wrapped value is returned.
+    #[must_use = "this returns the result of the operation, without modifying the original"]
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn overflowing_mul(self, rhs: Self) -> (Self, bool) {
+        let mut ret = U256::ZERO;
+        let mut ret_overflow = false;
+
+        for i in 0..3 {
+            let to_mul = (rhs >> (64 * i)).low_u64();
+            let (mul_res, _) = self.mul_u64(to_mul);
+            ret = ret.wrapping_add(mul_res << (64 * i));
+        }
+
+        let to_mul = (rhs >> 192).low_u64();
+        let (mul_res, overflow) = self.mul_u64(to_mul);
+        ret_overflow |= overflow;
+        let (sum, overflow) = ret.overflowing_add(mul_res);
+        ret = sum;
+        ret_overflow |= overflow;
+
+        (ret, ret_overflow)
+    }
+
+    /// Wrapping (modular) addition. Computes `self + rhs`, wrapping around at the boundary of the
+    /// type.
+    #[must_use = "this returns the result of the operation, without modifying the original"]
+    fn wrapping_add(self, rhs: Self) -> Self {
+        let (ret, _overflow) = self.overflowing_add(rhs);
+        ret
+    }
+
+    /// Wrapping (modular) subtraction. Computes `self - rhs`, wrapping around at the boundary of
+    /// the type.
+    #[must_use = "this returns the result of the operation, without modifying the original"]
+    fn wrapping_sub(self, rhs: Self) -> Self {
+        let (ret, _overflow) = self.overflowing_sub(rhs);
+        ret
+    }
+
+    /// Wrapping (modular) multiplication. Computes `self * rhs`, wrapping around at the boundary of
+    /// the type.
+    #[must_use = "this returns the result of the operation, without modifying the original"]
+    #[cfg(test)]
+    fn wrapping_mul(self, rhs: Self) -> Self {
+        let (ret, _overflow) = self.overflowing_mul(rhs);
+        ret
+    }
+
+    /// Returns `self` incremented by 1 wrapping around at the boundary of the type.
+    #[must_use = "this returns the result of the increment, without modifying the original"]
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn wrapping_inc(&self) -> U256 {
+        let mut ret = U256::ZERO;
+
+        ret.1 = self.1.wrapping_add(1);
+        if ret.1 == 0 {
+            ret.0 = self.0.wrapping_add(1);
+        } else {
+            ret.0 = self.0;
+        }
+        ret
+    }
+
+    /// Panic-free bitwise shift-left; yields `self << mask(rhs)`, where `mask` removes any
+    /// high-order bits of `rhs` that would cause the shift to exceed the bitwidth of the type.
+    ///
+    /// Note that this is *not* the same as a rotate-left; the RHS of a wrapping shift-left is
+    /// restricted to the range of the type, rather than the bits shifted out of the LHS being
+    /// returned to the other end. We do not currently support `rotate_left`.
+    #[must_use = "this returns the result of the operation, without modifying the original"]
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn wrapping_shl(self, rhs: u32) -> Self {
+        let shift = rhs & 0x000000ff;
+
+        let mut ret = U256::ZERO;
+        let word_shift = shift >= 128;
+        let bit_shift = shift % 128;
+
+        if word_shift {
+            ret.0 = self.1 << bit_shift
+        } else {
+            ret.0 = self.0 << bit_shift;
+            if bit_shift > 0 {
+                ret.0 += self.1.wrapping_shr(128 - bit_shift);
+            }
+            ret.1 = self.1 << bit_shift;
+        }
+        ret
+    }
+
+    /// Panic-free bitwise shift-right; yields `self >> mask(rhs)`, where `mask` removes any
+    /// high-order bits of `rhs` that would cause the shift to exceed the bitwidth of the type.
+    ///
+    /// Note that this is *not* the same as a rotate-right; the RHS of a wrapping shift-right is
+    /// restricted to the range of the type, rather than the bits shifted out of the LHS being
+    /// returned to the other end. We do not currently support `rotate_right`.
+    #[must_use = "this returns the result of the operation, without modifying the original"]
+    #[cfg_attr(all(test, mutate), mutate)]
+    fn wrapping_shr(self, rhs: u32) -> Self {
+        let shift = rhs & 0x000000ff;
+
+        let mut ret = U256::ZERO;
+        let word_shift = shift >= 128;
+        let bit_shift = shift % 128;
+
+        if word_shift {
+            ret.1 = self.0 >> bit_shift
+        } else {
+            ret.0 = self.0 >> bit_shift;
+            ret.1 = self.1 >> bit_shift;
+            if bit_shift > 0 {
+                ret.1 += self.0.wrapping_shl(128 - bit_shift);
+            }
+        }
+        ret
+    }
+
+    /// Format `self` to `f` as a decimal when value is known to be non-zero.
+    fn fmt_decimal(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        const DIGITS: usize = 78; // U256::MAX has 78 base 10 digits.
+        const TEN: U256 = U256(0, 10);
+
+        let mut buf = [0_u8; DIGITS];
+        let mut i = DIGITS - 1; // We loop backwards.
+        let mut cur = *self;
+
+        loop {
+            let digit = (cur % TEN).low_u128() as u8; // Cast after rem 10 is lossless.
+            buf[i] = digit + b'0';
+            cur = cur / TEN;
+            if cur.is_zero() {
+                break;
+            }
+            i -= 1;
+        }
+        let s = core::str::from_utf8(&buf[i..]).expect("digits 0-9 are valid UTF8");
+        f.pad_integral(true, "", s)
+    }
+
+    /// Convert self to f64.
+    #[inline]
+    fn to_f64(self) -> f64 {
+        // Reference: https://blog.m-ou.se/floats/
+        // Step 1: Get leading zeroes
+        let leading_zeroes = 256 - self.bits();
+        // Step 2: Get msb to be farthest left bit
+        let left_aligned = self.wrapping_shl(leading_zeroes);
+        // Step 3: Shift msb to fit in lower 53 bits (128-53=75) to get the mantissa
+        // * Shifting the border of the 2 u128s to line up with mantissa and dropped bits
+        let middle_aligned = left_aligned >> 75;
+        // * This is the 53 most significant bits as u128
+        let mantissa = middle_aligned.0;
+        // Step 4: Dropped bits (except for last 75 bits) are all in the second u128.
+        // Bitwise OR the rest of the bits into it, preserving the highest bit,
+        // so we take the lower 75 bits of middle_aligned.1 and mix it in. (See blog for explanation)
+        let dropped_bits = middle_aligned.1 | (left_aligned.1 & 0x7FF_FFFF_FFFF_FFFF_FFFF);
+        // Step 5: The msb of the dropped bits has been preserved, and all other bits
+        // if any were set, would be set somewhere in the other 127 bits.
+        // If msb of dropped bits is 0, it is mantissa + 0
+        // If msb of dropped bits is 1, it is mantissa + 0 only if mantissa lowest bit is 0
+        // and other bits of the dropped bits are all 0.
+        // (This is why we only care if the other non-msb dropped bits are all 0 or not,
+        // so we can just OR them to make sure any bits show up somewhere.)
+        let mantissa =
+            (mantissa + ((dropped_bits - (dropped_bits >> 127 & !mantissa)) >> 127)) as u64;
+        // Step 6: Calculate the exponent
+        // If self is 0, exponent should be 0 (special meaning) and mantissa will end up 0 too
+        // Otherwise, (255 - n) + 1022 so it simplifies to 1277 - n
+        // 1023 and 1022 are the cutoffs for the exponent having the msb next to the decimal point
+        let exponent = if self == Self::ZERO { 0 } else { 1277 - leading_zeroes as u64 };
+        // Step 7: sign bit is always 0, exponent is shifted into place
+        // Use addition instead of bitwise OR to saturate the exponent if mantissa overflows
+        f64::from_bits((exponent << 52) + mantissa)
+    }
+}
+
+// Target::MAX as a float value. Calculated with U256::to_f64.
+// This is validated in the unit tests as well.
+const TARGET_MAX_F64: f64 = 2.695953529101131e67;
+
+impl<T: Into<u128>> From<T> for U256 {
+    fn from(x: T) -> Self { U256(0, x.into()) }
+}
+
+/// Error from `TryFrom<signed type>` implementations, occurs when input is negative.
+#[derive(Debug)]
+pub struct TryFromError(i128);
+
+impl fmt::Display for TryFromError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "attempt to create unsigned integer type from negative number: {}", self.0)
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for TryFromError {}
+
+impl Add for U256 {
+    type Output = Self;
+    fn add(self, rhs: Self) -> Self {
+        let (res, overflow) = self.overflowing_add(rhs);
+        debug_assert!(!overflow, "Addition of U256 values overflowed");
+        res
+    }
+}
+
+impl Sub for U256 {
+    type Output = Self;
+    fn sub(self, rhs: Self) -> Self {
+        let (res, overflow) = self.overflowing_sub(rhs);
+        debug_assert!(!overflow, "Subtraction of U256 values overflowed");
+        res
+    }
+}
+
+impl Mul for U256 {
+    type Output = Self;
+    fn mul(self, rhs: Self) -> Self {
+        let (res, overflow) = self.overflowing_mul(rhs);
+        debug_assert!(!overflow, "Multiplication of U256 values overflowed");
+        res
+    }
+}
+
+impl Div for U256 {
+    type Output = Self;
+    fn div(self, rhs: Self) -> Self { self.div_rem(rhs).0 }
+}
+
+impl Rem for U256 {
+    type Output = Self;
+    fn rem(self, rhs: Self) -> Self { self.div_rem(rhs).1 }
+}
+
+impl Not for U256 {
+    type Output = Self;
+
+    fn not(self) -> Self { U256(!self.0, !self.1) }
+}
+
+impl Shl<u32> for U256 {
+    type Output = Self;
+    fn shl(self, shift: u32) -> U256 { self.wrapping_shl(shift) }
+}
+
+impl Shr<u32> for U256 {
+    type Output = Self;
+    fn shr(self, shift: u32) -> U256 { self.wrapping_shr(shift) }
+}
+
+impl fmt::Display for U256 {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        if self.is_zero() {
+            f.pad_integral(true, "", "0")
+        } else {
+            self.fmt_decimal(f)
+        }
+    }
+}
+
+impl fmt::Debug for U256 {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { write!(f, "{:#x}", self) }
+}
+
+macro_rules! impl_hex {
+    ($hex:ident, $case:expr) => {
+        impl $hex for U256 {
+            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+                internals::hex::display::fmt_hex_exact!(f, 32, &self.to_be_bytes(), $case)
+            }
+        }
+    };
+}
+impl_hex!(LowerHex, internals::hex::Case::Lower);
+impl_hex!(UpperHex, internals::hex::Case::Upper);
+
+#[cfg(feature = "serde")]
+impl crate::serde::Serialize for U256 {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: crate::serde::Serializer,
+    {
+        struct DisplayHex(U256);
+
+        impl fmt::Display for DisplayHex {
+            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { write!(f, "{:x}", self.0) }
+        }
+
+        if serializer.is_human_readable() {
+            // TODO: fast hex encoding.
+            serializer.collect_str(&DisplayHex(*self))
+        } else {
+            let bytes = self.to_be_bytes();
+            serializer.serialize_bytes(&bytes)
+        }
+    }
+}
+
+#[cfg(feature = "serde")]
+impl<'de> crate::serde::Deserialize<'de> for U256 {
+    fn deserialize<D: crate::serde::Deserializer<'de>>(d: D) -> Result<Self, D::Error> {
+
+        use hashes::hex::FromHex;
+
+        use crate::serde::de;
+
+        if d.is_human_readable() {
+            struct HexVisitor;
+
+            impl<'de> de::Visitor<'de> for HexVisitor {
+                type Value = U256;
+
+                fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result {
+                    f.write_str("a 32 byte ASCII hex string")
+                }
+
+                fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
+                where
+                    E: de::Error,
+                {
+                    if s.len() != 64 {
+                        return Err(de::Error::invalid_length(s.len(), &self));
+                    }
+
+                    let b = <[u8; 32]>::from_hex(s)
+                        .map_err(|_| de::Error::invalid_value(de::Unexpected::Str(s), &self))?;
+
+                    Ok(U256::from_be_bytes(b))
+                }
+
+                fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
+                where
+                    E: de::Error,
+                {
+                    if let Ok(hex) = core::str::from_utf8(v) {
+                        let b = <[u8; 32]>::from_hex(hex).map_err(|_| {
+                            de::Error::invalid_value(de::Unexpected::Str(hex), &self)
+                        })?;
+
+                        Ok(U256::from_be_bytes(b))
+                    } else {
+                        Err(E::invalid_value(::serde::de::Unexpected::Bytes(v), &self))
+                    }
+                }
+            }
+            d.deserialize_str(HexVisitor)
+        } else {
+            struct BytesVisitor;
+
+            impl<'de> serde::de::Visitor<'de> for BytesVisitor {
+                type Value = U256;
+
+                fn expecting(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                    f.write_str("a sequence of bytes")
+                }
+
+                fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
+                where
+                    E: serde::de::Error,
+                {
+                    let b = v.try_into().map_err(|_| de::Error::invalid_length(v.len(), &self))?;
+                    Ok(U256::from_be_bytes(b))
+                }
+            }
+
+            d.deserialize_bytes(BytesVisitor)
+        }
+    }
+}
+
+/// Splits a 32 byte array into two 16 byte arrays.
+fn split_in_half(a: [u8; 32]) -> ([u8; 16], [u8; 16]) {
+    let mut high = [0_u8; 16];
+    let mut low = [0_u8; 16];
+
+    high.copy_from_slice(&a[..16]);
+    low.copy_from_slice(&a[16..]);
+
+    (high, low)
+}
+
+#[cfg(kani)]
+impl kani::Arbitrary for U256 {
+    fn any() -> Self {
+        let high: u128 = kani::any();
+        let low: u128 = kani::any();
+        Self(high, low)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    impl<T: Into<u128>> From<T> for Target {
+        fn from(x: T) -> Self { Self(U256::from(x)) }
+    }
+
+    impl<T: Into<u128>> From<T> for Work {
+        fn from(x: T) -> Self { Self(U256::from(x)) }
+    }
+
+    impl U256 {
+        fn bit_at(&self, index: usize) -> bool {
+            if index > 255 {
+                panic!("index out of bounds");
+            }
+
+            let word = if index < 128 { self.1 } else { self.0 };
+            (word & (1 << (index % 128))) != 0
+        }
+    }
+
+    impl U256 {
+        /// Creates a U256 from a big-endian array of u64's
+        fn from_array(a: [u64; 4]) -> Self {
+            let mut ret = U256::ZERO;
+            ret.0 = (a[0] as u128) << 64 ^ (a[1] as u128);
+            ret.1 = (a[2] as u128) << 64 ^ (a[3] as u128);
+            ret
+        }
+    }
+
+    #[test]
+    fn u256_num_bits() {
+        assert_eq!(U256::from(255_u64).bits(), 8);
+        assert_eq!(U256::from(256_u64).bits(), 9);
+        assert_eq!(U256::from(300_u64).bits(), 9);
+        assert_eq!(U256::from(60000_u64).bits(), 16);
+        assert_eq!(U256::from(70000_u64).bits(), 17);
+
+        let u = U256::from(u128::max_value()) << 1;
+        assert_eq!(u.bits(), 129);
+
+        // Try to read the following lines out loud quickly
+        let mut shl = U256::from(70000_u64);
+        shl = shl << 100;
+        assert_eq!(shl.bits(), 117);
+        shl = shl << 100;
+        assert_eq!(shl.bits(), 217);
+        shl = shl << 100;
+        assert_eq!(shl.bits(), 0);
+    }
+
+    #[test]
+    fn u256_bit_at() {
+        assert!(!U256::from(10_u64).bit_at(0));
+        assert!(U256::from(10_u64).bit_at(1));
+        assert!(!U256::from(10_u64).bit_at(2));
+        assert!(U256::from(10_u64).bit_at(3));
+        assert!(!U256::from(10_u64).bit_at(4));
+
+        let u = U256(0xa000_0000_0000_0000_0000_0000_0000_0000, 0);
+        assert!(u.bit_at(255));
+        assert!(!u.bit_at(254));
+        assert!(u.bit_at(253));
+        assert!(!u.bit_at(252));
+    }
+
+    #[test]
+    fn u256_lower_hex() {
+        assert_eq!(
+            format!("{:x}", U256::from(0xDEADBEEF_u64)),
+            "00000000000000000000000000000000000000000000000000000000deadbeef",
+        );
+        assert_eq!(
+            format!("{:#x}", U256::from(0xDEADBEEF_u64)),
+            "0x00000000000000000000000000000000000000000000000000000000deadbeef",
+        );
+        assert_eq!(
+            format!("{:x}", U256::MAX),
+            "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
+        );
+        assert_eq!(
+            format!("{:#x}", U256::MAX),
+            "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
+        );
+    }
+
+    #[test]
+    fn u256_upper_hex() {
+        assert_eq!(
+            format!("{:X}", U256::from(0xDEADBEEF_u64)),
+            "00000000000000000000000000000000000000000000000000000000DEADBEEF",
+        );
+        assert_eq!(
+            format!("{:#X}", U256::from(0xDEADBEEF_u64)),
+            "0x00000000000000000000000000000000000000000000000000000000DEADBEEF",
+        );
+        assert_eq!(
+            format!("{:X}", U256::MAX),
+            "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF",
+        );
+        assert_eq!(
+            format!("{:#X}", U256::MAX),
+            "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF",
+        );
+    }
+
+    #[test]
+    fn u256_display() {
+        assert_eq!(format!("{}", U256::from(100_u32)), "100",);
+        assert_eq!(format!("{}", U256::ZERO), "0",);
+        assert_eq!(format!("{}", U256::from(u64::max_value())), format!("{}", u64::max_value()),);
+        assert_eq!(
+            format!("{}", U256::MAX),
+            "115792089237316195423570985008687907853269984665640564039457584007913129639935",
+        );
+    }
+
+    macro_rules! check_format {
+        ($($test_name:ident, $val:literal, $format_string:literal, $expected:literal);* $(;)?) => {
+            $(
+                #[test]
+                fn $test_name() {
+                    assert_eq!(format!($format_string, U256::from($val)), $expected);
+                }
+            )*
+        }
+    }
+    check_format! {
+        check_fmt_0, 0_u32, "{}", "0";
+        check_fmt_1, 0_u32, "{:2}", " 0";
+        check_fmt_2, 0_u32, "{:02}", "00";
+
+        check_fmt_3, 1_u32, "{}", "1";
+        check_fmt_4, 1_u32, "{:2}", " 1";
+        check_fmt_5, 1_u32, "{:02}", "01";
+
+        check_fmt_10, 10_u32, "{}", "10";
+        check_fmt_11, 10_u32, "{:2}", "10";
+        check_fmt_12, 10_u32, "{:02}", "10";
+        check_fmt_13, 10_u32, "{:3}", " 10";
+        check_fmt_14, 10_u32, "{:03}", "010";
+
+        check_fmt_20, 1_u32, "{:<2}", "1 ";
+        check_fmt_21, 1_u32, "{:<02}", "01";
+        check_fmt_22, 1_u32, "{:>2}", " 1"; // This is default but check it anyways.
+        check_fmt_23, 1_u32, "{:>02}", "01";
+        check_fmt_24, 1_u32, "{:^3}", " 1 ";
+        check_fmt_25, 1_u32, "{:^03}", "001";
+        // Sanity check, for integral types precision is ignored.
+        check_fmt_30, 0_u32, "{:.1}", "0";
+        check_fmt_31, 0_u32, "{:4.1}", "   0";
+        check_fmt_32, 0_u32, "{:04.1}", "0000";
+    }
+
+    #[test]
+    fn u256_comp() {
+        let small = U256::from_array([0, 0, 0, 10]);
+        let big = U256::from_array([0, 0, 0x0209_E737_8231_E632, 0x8C8C_3EE7_0C64_4118]);
+        let bigger = U256::from_array([0, 0, 0x0209_E737_8231_E632, 0x9C8C_3EE7_0C64_4118]);
+        let biggest = U256::from_array([1, 0, 0x0209_E737_8231_E632, 0x5C8C_3EE7_0C64_4118]);
+
+        assert!(small < big);
+        assert!(big < bigger);
+        assert!(bigger < biggest);
+        assert!(bigger <= biggest);
+        assert!(biggest <= biggest);
+        assert!(bigger >= big);
+        assert!(bigger >= small);
+        assert!(small <= small);
+    }
+
+    const WANT: U256 =
+        U256(0x1bad_cafe_dead_beef_deaf_babe_2bed_feed, 0xbaad_f00d_defa_ceda_11fe_d2ba_d1c0_ffe0);
+
+    #[rustfmt::skip]
+    const BE_BYTES: [u8; 32] = [
+        0x1b, 0xad, 0xca, 0xfe, 0xde, 0xad, 0xbe, 0xef, 0xde, 0xaf, 0xba, 0xbe, 0x2b, 0xed, 0xfe, 0xed,
+        0xba, 0xad, 0xf0, 0x0d, 0xde, 0xfa, 0xce, 0xda, 0x11, 0xfe, 0xd2, 0xba, 0xd1, 0xc0, 0xff, 0xe0,
+    ];
+
+    #[rustfmt::skip]
+    const LE_BYTES: [u8; 32] = [
+        0xe0, 0xff, 0xc0, 0xd1, 0xba, 0xd2, 0xfe, 0x11, 0xda, 0xce, 0xfa, 0xde, 0x0d, 0xf0, 0xad, 0xba,
+        0xed, 0xfe, 0xed, 0x2b, 0xbe, 0xba, 0xaf, 0xde, 0xef, 0xbe, 0xad, 0xde, 0xfe, 0xca, 0xad, 0x1b,
+    ];
+
+    // Sanity check that we have the bytes in the correct big-endian order.
+    #[test]
+    fn sanity_be_bytes() {
+        let mut out = [0_u8; 32];
+        out[..16].copy_from_slice(&WANT.0.to_be_bytes());
+        out[16..].copy_from_slice(&WANT.1.to_be_bytes());
+        assert_eq!(out, BE_BYTES);
+    }
+
+    // Sanity check that we have the bytes in the correct little-endian order.
+    #[test]
+    fn sanity_le_bytes() {
+        let mut out = [0_u8; 32];
+        out[..16].copy_from_slice(&WANT.1.to_le_bytes());
+        out[16..].copy_from_slice(&WANT.0.to_le_bytes());
+        assert_eq!(out, LE_BYTES);
+    }
+
+    #[test]
+    fn u256_to_be_bytes() {
+        assert_eq!(WANT.to_be_bytes(), BE_BYTES);
+    }
+
+    #[test]
+    fn u256_from_be_bytes() {
+        assert_eq!(U256::from_be_bytes(BE_BYTES), WANT);
+    }
+
+    #[test]
+    fn u256_to_le_bytes() {
+        assert_eq!(WANT.to_le_bytes(), LE_BYTES);
+    }
+
+    #[test]
+    fn u256_from_le_bytes() {
+        assert_eq!(U256::from_le_bytes(LE_BYTES), WANT);
+    }
+
+    #[test]
+    fn u256_from_u8() {
+        let u = U256::from(0xbe_u8);
+        assert_eq!(u, U256(0, 0xbe));
+    }
+
+    #[test]
+    fn u256_from_u16() {
+        let u = U256::from(0xbeef_u16);
+        assert_eq!(u, U256(0, 0xbeef));
+    }
+
+    #[test]
+    fn u256_from_u32() {
+        let u = U256::from(0xdeadbeef_u32);
+        assert_eq!(u, U256(0, 0xdeadbeef));
+    }
+
+    #[test]
+    fn u256_from_u64() {
+        let u = U256::from(0xdead_beef_cafe_babe_u64);
+        assert_eq!(u, U256(0, 0xdead_beef_cafe_babe));
+    }
+
+    #[test]
+    fn u256_from_u128() {
+        let u = U256::from(0xdead_beef_cafe_babe_0123_4567_89ab_cdefu128);
+        assert_eq!(u, U256(0, 0xdead_beef_cafe_babe_0123_4567_89ab_cdef));
+    }
+
+    macro_rules! test_from_unsigned_integer_type {
+        ($($test_name:ident, $ty:ident);* $(;)?) => {
+            $(
+                #[test]
+                fn $test_name() {
+                    // Internal representation is big-endian.
+                    let want = U256(0, 0xAB);
+
+                    let x = 0xAB as $ty;
+                    let got = U256::from(x);
+
+                    assert_eq!(got, want);
+                }
+            )*
+        }
+    }
+    test_from_unsigned_integer_type! {
+        from_unsigned_integer_type_u8, u8;
+        from_unsigned_integer_type_u16, u16;
+        from_unsigned_integer_type_u32, u32;
+        from_unsigned_integer_type_u64, u64;
+        from_unsigned_integer_type_u128, u128;
+    }
+
+    #[test]
+    fn u256_from_be_array_u64() {
+        let array = [
+            0x1bad_cafe_dead_beef,
+            0xdeaf_babe_2bed_feed,
+            0xbaad_f00d_defa_ceda,
+            0x11fe_d2ba_d1c0_ffe0,
+        ];
+
+        let uint = U256::from_array(array);
+        assert_eq!(uint, WANT);
+    }
+
+    #[test]
+    fn u256_shift_left() {
+        let u = U256::from(1_u32);
+        assert_eq!(u << 0, u);
+        assert_eq!(u << 1, U256::from(2_u64));
+        assert_eq!(u << 63, U256::from(0x8000_0000_0000_0000_u64));
+        assert_eq!(u << 64, U256::from_array([0, 0, 0x0000_0000_0000_0001, 0]));
+        assert_eq!(u << 127, U256(0, 0x8000_0000_0000_0000_0000_0000_0000_0000));
+        assert_eq!(u << 128, U256(1, 0));
+
+        let x = U256(0, 0x8000_0000_0000_0000_0000_0000_0000_0000);
+        assert_eq!(x << 1, U256(1, 0));
+    }
+
+    #[test]
+    fn u256_shift_right() {
+        let u = U256(1, 0);
+        assert_eq!(u >> 0, u);
+        assert_eq!(u >> 1, U256(0, 0x8000_0000_0000_0000_0000_0000_0000_0000));
+        assert_eq!(u >> 127, U256(0, 2));
+        assert_eq!(u >> 128, U256(0, 1));
+    }
+
+    #[test]
+    fn u256_arithmetic() {
+        let init = U256::from(0xDEAD_BEEF_DEAD_BEEF_u64);
+        let copy = init;
+
+        let add = init.wrapping_add(copy);
+        assert_eq!(add, U256::from_array([0, 0, 1, 0xBD5B_7DDF_BD5B_7DDE]));
+        // Bitshifts
+        let shl = add << 88;
+        assert_eq!(shl, U256::from_array([0, 0x01BD_5B7D, 0xDFBD_5B7D_DE00_0000, 0]));
+        let shr = shl >> 40;
+        assert_eq!(shr, U256::from_array([0, 0, 0x0001_BD5B_7DDF_BD5B, 0x7DDE_0000_0000_0000]));
+        // Increment
+        let mut incr = shr;
+        incr = incr.wrapping_inc();
+        assert_eq!(incr, U256::from_array([0, 0, 0x0001_BD5B_7DDF_BD5B, 0x7DDE_0000_0000_0001]));
+        // Subtraction
+        let sub = incr.wrapping_sub(init);
+        assert_eq!(sub, U256::from_array([0, 0, 0x0001_BD5B_7DDF_BD5A, 0x9F30_4110_2152_4112]));
+        // Multiplication
+        let (mult, _) = sub.mul_u64(300);
+        assert_eq!(mult, U256::from_array([0, 0, 0x0209_E737_8231_E632, 0x8C8C_3EE7_0C64_4118]));
+        // Division
+        assert_eq!(U256::from(105_u32) / U256::from(5_u32), U256::from(21_u32));
+        let div = mult / U256::from(300_u32);
+        assert_eq!(div, U256::from_array([0, 0, 0x0001_BD5B_7DDF_BD5A, 0x9F30_4110_2152_4112]));
+
+        assert_eq!(U256::from(105_u32) % U256::from(5_u32), U256::ZERO);
+        assert_eq!(U256::from(35498456_u32) % U256::from(3435_u32), U256::from(1166_u32));
+        let rem_src = mult.wrapping_mul(U256::from(39842_u32)).wrapping_add(U256::from(9054_u32));
+        assert_eq!(rem_src % U256::from(39842_u32), U256::from(9054_u32));
+    }
+
+    #[test]
+    fn u256_bit_inversion() {
+        let v = U256(1, 0);
+        let want = U256(
+            0xffff_ffff_ffff_ffff_ffff_ffff_ffff_fffe,
+            0xffff_ffff_ffff_ffff_ffff_ffff_ffff_ffff,
+        );
+        assert_eq!(!v, want);
+
+        let v = U256(0x0c0c_0c0c_0c0c_0c0c_0c0c_0c0c_0c0c_0c0c, 0xeeee_eeee_eeee_eeee);
+        let want = U256(
+            0xf3f3_f3f3_f3f3_f3f3_f3f3_f3f3_f3f3_f3f3,
+            0xffff_ffff_ffff_ffff_1111_1111_1111_1111,
+        );
+        assert_eq!(!v, want);
+    }
+
+    #[test]
+    fn u256_mul_u64_by_one() {
+        let v = U256::from(0xDEAD_BEEF_DEAD_BEEF_u64);
+        assert_eq!(v, v.mul_u64(1_u64).0);
+    }
+
+    #[test]
+    fn u256_mul_u64_by_zero() {
+        let v = U256::from(0xDEAD_BEEF_DEAD_BEEF_u64);
+        assert_eq!(U256::ZERO, v.mul_u64(0_u64).0);
+    }
+
+    #[test]
+    fn u256_mul_u64() {
+        let u64_val = U256::from(0xDEAD_BEEF_DEAD_BEEF_u64);
+
+        let u96_res = u64_val.mul_u64(0xFFFF_FFFF).0;
+        let u128_res = u96_res.mul_u64(0xFFFF_FFFF).0;
+        let u160_res = u128_res.mul_u64(0xFFFF_FFFF).0;
+        let u192_res = u160_res.mul_u64(0xFFFF_FFFF).0;
+        let u224_res = u192_res.mul_u64(0xFFFF_FFFF).0;
+        let u256_res = u224_res.mul_u64(0xFFFF_FFFF).0;
+
+        assert_eq!(u96_res, U256::from_array([0, 0, 0xDEAD_BEEE, 0xFFFF_FFFF_2152_4111]));
+        assert_eq!(
+            u128_res,
+            U256::from_array([0, 0, 0xDEAD_BEEE_2152_4110, 0x2152_4111_DEAD_BEEF])
+        );
+        assert_eq!(
+            u160_res,
+            U256::from_array([0, 0xDEAD_BEED, 0x42A4_8222_0000_0001, 0xBD5B_7DDD_2152_4111])
+        );
+        assert_eq!(
+            u192_res,
+            U256::from_array([
+                0,
+                0xDEAD_BEEC_63F6_C334,
+                0xBD5B_7DDF_BD5B_7DDB,
+                0x63F6_C333_DEAD_BEEF
+            ])
+        );
+        assert_eq!(
+            u224_res,
+            U256::from_array([
+                0xDEAD_BEEB,
+                0x8549_0448_5964_BAAA,
+                0xFFFF_FFFB_A69B_4558,
+                0x7AB6_FBBB_2152_4111
+            ])
+        );
+        assert_eq!(
+            u256_res,
+            U256(
+                0xDEAD_BEEA_A69B_455C_D41B_B662_A69B_4550,
+                0xA69B_455C_D41B_B662_A69B_4555_DEAD_BEEF,
+            )
+        );
+    }
+
+    #[test]
+    fn u256_addition() {
+        let x = U256::from(u128::max_value());
+        let (add, overflow) = x.overflowing_add(U256::ONE);
+        assert!(!overflow);
+        assert_eq!(add, U256(1, 0));
+
+        let (add, _) = add.overflowing_add(U256::ONE);
+        assert_eq!(add, U256(1, 1));
+    }
+
+    #[test]
+    fn u256_subtraction() {
+        let (sub, overflow) = U256::ONE.overflowing_sub(U256::ONE);
+        assert!(!overflow);
+        assert_eq!(sub, U256::ZERO);
+
+        let x = U256(1, 0);
+        let (sub, overflow) = x.overflowing_sub(U256::ONE);
+        assert!(!overflow);
+        assert_eq!(sub, U256::from(u128::max_value()));
+    }
+
+    #[test]
+    fn u256_multiplication() {
+        let u64_val = U256::from(0xDEAD_BEEF_DEAD_BEEF_u64);
+
+        let u128_res = u64_val.wrapping_mul(u64_val);
+
+        assert_eq!(u128_res, U256(0, 0xC1B1_CD13_A4D1_3D46_048D_1354_216D_A321));
+
+        let u256_res = u128_res.wrapping_mul(u128_res);
+
+        assert_eq!(
+            u256_res,
+            U256(
+                0x928D_92B4_D7F5_DF33_4AFC_FF6F_0375_C608,
+                0xF5CF_7F36_18C2_C886_F4E1_66AA_D40D_0A41,
+            )
+        );
+    }
+
+    #[test]
+    fn u256_multiplication_bits_in_each_word() {
+        // Put a digit in the least significant bit of each 64 bit word.
+        let u = 1_u128 << 64 | 1_u128;
+        let x = U256(u, u);
+
+        // Put a digit in the second least significant bit of each 64 bit word.
+        let u = 2_u128 << 64 | 2_u128;
+        let y = U256(u, u);
+
+        let (got, overflow) = x.overflowing_mul(y);
+
+        let want = U256(
+            0x0000_0000_0000_0008_0000_0000_0000_0008,
+            0x0000_0000_0000_0006_0000_0000_0000_0004,
+        );
+        assert!(!overflow);
+        assert_eq!(got, want)
+    }
+
+    #[test]
+    fn u256_increment() {
+        let mut val = U256(
+            0xEFFF_FFFF_FFFF_FFFF_FFFF_FFFF_FFFF_FFFF,
+            0xFFFF_FFFF_FFFF_FFFF_FFFF_FFFF_FFFF_FFFE,
+        );
+        val = val.wrapping_inc();
+        assert_eq!(
+            val,
+            U256(
+                0xEFFF_FFFF_FFFF_FFFF_FFFF_FFFF_FFFF_FFFF,
+                0xFFFF_FFFF_FFFF_FFFF_FFFF_FFFF_FFFF_FFFF,
+            )
+        );
+        val = val.wrapping_inc();
+        assert_eq!(
+            val,
+            U256(
+                0xF000_0000_0000_0000_0000_0000_0000_0000,
+                0x0000_0000_0000_0000_0000_0000_0000_0000,
+            )
+        );
+
+        assert_eq!(U256::MAX.wrapping_inc(), U256::ZERO);
+    }
+
+    #[test]
+    fn u256_extreme_bitshift() {
+        // Shifting a u64 by 64 bits gives an undefined value, so make sure that
+        // we're doing the Right Thing here
+        let init = U256::from(0xDEAD_BEEF_DEAD_BEEF_u64);
+
+        assert_eq!(init << 64, U256(0, 0xDEAD_BEEF_DEAD_BEEF_0000_0000_0000_0000));
+        let add = (init << 64).wrapping_add(init);
+        assert_eq!(add, U256(0, 0xDEAD_BEEF_DEAD_BEEF_DEAD_BEEF_DEAD_BEEF));
+        assert_eq!(add >> 0, U256(0, 0xDEAD_BEEF_DEAD_BEEF_DEAD_BEEF_DEAD_BEEF));
+        assert_eq!(add << 0, U256(0, 0xDEAD_BEEF_DEAD_BEEF_DEAD_BEEF_DEAD_BEEF));
+        assert_eq!(add >> 64, U256(0, 0x0000_0000_0000_0000_DEAD_BEEF_DEAD_BEEF));
+        assert_eq!(
+            add << 64,
+            U256(0xDEAD_BEEF_DEAD_BEEF, 0xDEAD_BEEF_DEAD_BEEF_0000_0000_0000_0000)
+        );
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn u256_serde() {
+        let check = |uint, hex| {
+            let json = format!("\"{}\"", hex);
+            assert_eq!(::serde_json::to_string(&uint).unwrap(), json);
+            assert_eq!(::serde_json::from_str::<U256>(&json).unwrap(), uint);
+
+            let bin_encoded = bincode::serialize(&uint).unwrap();
+            let bin_decoded: U256 = bincode::deserialize(&bin_encoded).unwrap();
+            assert_eq!(bin_decoded, uint);
+        };
+
+        check(U256::ZERO, "0000000000000000000000000000000000000000000000000000000000000000");
+        check(
+            U256::from(0xDEADBEEF_u32),
+            "00000000000000000000000000000000000000000000000000000000deadbeef",
+        );
+        check(
+            U256::from_array([0xdd44, 0xcc33, 0xbb22, 0xaa11]),
+            "000000000000dd44000000000000cc33000000000000bb22000000000000aa11",
+        );
+        check(U256::MAX, "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
+        check(
+            U256(
+                0xDEAD_BEEA_A69B_455C_D41B_B662_A69B_4550,
+                0xA69B_455C_D41B_B662_A69B_4555_DEAD_BEEF,
+            ),
+            "deadbeeaa69b455cd41bb662a69b4550a69b455cd41bb662a69b4555deadbeef",
+        );
+
+        assert!(::serde_json::from_str::<U256>(
+            "\"fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffg\""
+        )
+        .is_err()); // invalid char
+        assert!(::serde_json::from_str::<U256>(
+            "\"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff\""
+        )
+        .is_err()); // invalid length
+        assert!(::serde_json::from_str::<U256>(
+            "\"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff\""
+        )
+        .is_err()); // invalid length
+    }
+
+    #[test]
+    fn u256_is_max_correct_negative() {
+        let tc = vec![U256::ZERO, U256::ONE, U256::from(u128::max_value())];
+        for t in tc {
+            assert!(!t.is_max())
+        }
+    }
+
+    #[test]
+    fn u256_is_max_correct_positive() {
+        assert!(U256::MAX.is_max());
+
+        let u = u128::max_value();
+        assert!(((U256::from(u) << 128) + U256::from(u)).is_max());
+    }
+
+    #[test]
+    fn compact_target_from_hex_str_happy_path() {
+        let actual = CompactTarget::from_hex_str("0x01003456").unwrap();
+        let expected = CompactTarget(0x01003456);
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn compact_target_from_hex_str_no_prefix_happy_path() {
+        let actual = CompactTarget::from_hex_str_no_prefix("01003456").unwrap();
+        let expected = CompactTarget(0x01003456);
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn compact_target_from_hex_invalid_hex_should_err() {
+        let hex = "0xzbf9";
+        let result = CompactTarget::from_hex_str(hex);
+        assert!(result.is_err());
+    }
+
+    #[test]
+    fn target_from_compact() {
+        // (nBits, target)
+        let tests = vec![
+            (0x0100_3456_u32, 0x00_u64), // High bit set.
+            (0x0112_3456_u32, 0x12_u64),
+            (0x0200_8000_u32, 0x80_u64),
+            (0x0500_9234_u32, 0x9234_0000_u64),
+            (0x0492_3456_u32, 0x00_u64), // High bit set (0x80 in 0x92).
+            (0x0412_3456_u32, 0x1234_5600_u64), // Inverse of above; no high bit.
+        ];
+
+        for (n_bits, target) in tests {
+            let want = Target::from(target);
+            let got = Target::from_compact(CompactTarget::from_consensus(n_bits));
+            assert_eq!(got, want);
+        }
+    }
+
+    #[test]
+    fn target_is_met_by_for_target_equals_hash() {
+        use std::str::FromStr;
+
+        use hashes::Hash;
+
+        let hash =
+            BlockHash::from_str("ef537f25c895bfa782526529a9b63d97aa631564d5d789c2b765448c8635fb6c")
+                .expect("failed to parse block hash");
+        let target = Target(U256::from_le_bytes(hash.to_byte_array()));
+        assert!(target.is_met_by(hash));
+    }
+
+    #[test]
+    fn max_target_from_compact() {
+        // The highest possible target is defined as 0x1d00ffff
+        let bits = 0x1d00ffff_u32;
+        let want = Target::MAX;
+        let got = Target::from_compact(CompactTarget::from_consensus(bits));
+        assert_eq!(got, want)
+    }
+
+    #[test]
+    fn target_difficulty_float() {
+        assert_eq!(Target::MAX.difficulty_float(), 1.0_f64);
+        assert_eq!(
+            Target::from_compact(CompactTarget::from_consensus(0x1c00ffff_u32)).difficulty_float(),
+            256.0_f64
+        );
+        assert_eq!(
+            Target::from_compact(CompactTarget::from_consensus(0x1b00ffff_u32)).difficulty_float(),
+            65536.0_f64
+        );
+        assert_eq!(
+            Target::from_compact(CompactTarget::from_consensus(0x1a00f3a2_u32)).difficulty_float(),
+            17628585.065897066_f64
+        );
+    }
+
+    #[test]
+    fn roundtrip_compact_target() {
+        let consensus = 0x1d00_ffff;
+        let compact = CompactTarget::from_consensus(consensus);
+        let t = Target::from_compact(CompactTarget::from_consensus(consensus));
+        assert_eq!(t, Target::from(compact)); // From/Into sanity check.
+
+        let back = t.to_compact_lossy();
+        assert_eq!(back, compact); // From/Into sanity check.
+
+        assert_eq!(back.to_consensus(), consensus);
+    }
+
+    #[test]
+    fn roundtrip_target_work() {
+        let target = Target::from(0xdeadbeef_u32);
+        let work = target.to_work();
+        let back = work.to_target();
+        assert_eq!(back, target)
+    }
+
+    #[cfg(feature = "std")]
+    #[test]
+    fn work_log2() {
+        // Compare work log2 to historical Bitcoin Core values found in Core logs.
+        let tests: Vec<(u128, f64)> = vec![
+            // (chainwork, core log2)                // height
+            (0x200020002, 33.000022),                // 1
+            (0xa97d67041c5e51596ee7, 79.405055),     // 308004
+            (0x1dc45d79394baa8ab18b20, 84.895644),   // 418141
+            (0x8c85acb73287e335d525b98, 91.134654),  // 596624
+            (0x2ef447e01d1642c40a184ada, 93.553183), // 738965
+        ];
+
+        for (chainwork, core_log2) in tests {
+            // Core log2 in the logs is rounded to 6 decimal places.
+            let log2 = (Work::from(chainwork).log2() * 1e6).round() / 1e6;
+            assert_eq!(log2, core_log2)
+        }
+
+        assert_eq!(Work(U256::ONE).log2(), 0.0);
+        assert_eq!(Work(U256::MAX).log2(), 256.0);
+    }
+
+    #[test]
+    fn u256_zero_min_max_inverse() {
+        assert_eq!(U256::MAX.inverse(), U256::ONE);
+        assert_eq!(U256::ONE.inverse(), U256::MAX);
+        assert_eq!(U256::ZERO.inverse(), U256::MAX);
+    }
+
+    #[test]
+    fn u256_max_min_inverse_roundtrip() {
+        let max = U256::MAX;
+
+        for min in [U256::ZERO, U256::ONE].iter() {
+            // lower target means more work required.
+            assert_eq!(Target(max).to_work(), Work(U256::ONE));
+            assert_eq!(Target(*min).to_work(), Work(max));
+
+            assert_eq!(Work(max).to_target(), Target(U256::ONE));
+            assert_eq!(Work(*min).to_target(), Target(max));
+        }
+    }
+
+    #[test]
+    fn u256_wrapping_add_wraps_at_boundry() {
+        assert_eq!(U256::MAX.wrapping_add(U256::ONE), U256::ZERO);
+        assert_eq!(U256::MAX.wrapping_add(U256::from(2_u8)), U256::ONE);
+    }
+
+    #[test]
+    fn u256_wrapping_sub_wraps_at_boundry() {
+        assert_eq!(U256::ZERO.wrapping_sub(U256::ONE), U256::MAX);
+        assert_eq!(U256::ONE.wrapping_sub(U256::from(2_u8)), U256::MAX);
+    }
+
+    #[test]
+    fn mul_u64_overflows() {
+        let (_, overflow) = U256::MAX.mul_u64(2);
+        assert!(overflow, "max * 2 should overflow");
+    }
+
+    #[test]
+    #[should_panic]
+    fn u256_overflowing_addition_panics() { let _ = U256::MAX + U256::ONE; }
+
+    #[test]
+    #[should_panic]
+    fn u256_overflowing_subtraction_panics() { let _ = U256::ZERO - U256::ONE; }
+
+    #[test]
+    #[should_panic]
+    fn u256_multiplication_by_max_panics() { let _ = U256::MAX * U256::MAX; }
+
+    #[test]
+    #[should_panic]
+    fn work_overflowing_addition_panics() { let _ = Work(U256::MAX) + Work(U256::ONE); }
+
+    #[test]
+    #[should_panic]
+    fn work_overflowing_subtraction_panics() { let _ = Work(U256::ZERO) - Work(U256::ONE); }
+
+    #[test]
+    fn u256_to_f64() {
+        // Validate that the Target::MAX value matches the constant also used in difficulty calculation.
+        assert_eq!(Target::MAX.0.to_f64(), TARGET_MAX_F64);
+        assert_eq!(U256::ZERO.to_f64(), 0.0_f64);
+        assert_eq!(U256::ONE.to_f64(), 1.0_f64);
+        assert_eq!(U256::MAX.to_f64(), 1.157920892373162e77_f64);
+        assert_eq!((U256::MAX >> 1).to_f64(), 5.78960446186581e76_f64);
+        assert_eq!((U256::MAX >> 128).to_f64(), 3.402823669209385e38_f64);
+        assert_eq!((U256::MAX >> (256 - 54)).to_f64(), 1.8014398509481984e16_f64);
+        // 53 bits and below should not use exponents
+        assert_eq!((U256::MAX >> (256 - 53)).to_f64(), 9007199254740991.0_f64);
+        assert_eq!((U256::MAX >> (256 - 32)).to_f64(), 4294967295.0_f64);
+        assert_eq!((U256::MAX >> (256 - 16)).to_f64(), 65535.0_f64);
+        assert_eq!((U256::MAX >> (256 - 8)).to_f64(), 255.0_f64);
+    }
+}
+
+#[cfg(kani)]
+mod verification {
+    use super::*;
+
+    // TODO: After we verify div_rem assert x * y / y == x
+    #[kani::unwind(5)] // mul_u64 loops over 4 64 bit ints so use one more than 4
+    #[kani::proof]
+    fn check_mul_u64() {
+        let x: U256 = kani::any();
+        let y: u64 = kani::any();
+
+        let _ = x.mul_u64(y);
+    }
+}
diff --git a/dash/src/psbt/error.rs b/dash/src/psbt/error.rs
new file mode 100644
index 000000000..9c9153bc7
--- /dev/null
+++ b/dash/src/psbt/error.rs
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: CC0-1.0
+
+use core::fmt;
+
+use internals::write_err;
+
+use crate::bip32::ExtendedPubKey;
+use crate::blockdata::transaction::Transaction;
+use crate::consensus::encode;
+use crate::prelude::*;
+use crate::psbt::raw;
+use crate::{hashes, io};
+
+/// Enum for marking psbt hash error.
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+pub enum PsbtHash {
+    Ripemd,
+    Sha256,
+    Hash160,
+    Hash256,
+}
+/// Ways that a Partially Signed Transaction might fail.
+#[derive(Debug)]
+#[non_exhaustive]
+pub enum Error {
+    /// Magic bytes for a PSBT must be the ASCII for "psbt" serialized in most
+    /// significant byte order.
+    InvalidMagic,
+    /// Missing both the witness and non-witness utxo.
+    MissingUtxo,
+    /// The separator for a PSBT must be `0xff`.
+    InvalidSeparator,
+    /// Returned when output index is out of bounds in relation to the output in non-witness UTXO.
+    PsbtUtxoOutOfbounds,
+    /// Known keys must be according to spec.
+    InvalidKey(raw::Key),
+    /// Non-proprietary key type found when proprietary key was expected
+    InvalidProprietaryKey,
+    /// Keys within key-value map should never be duplicated.
+    DuplicateKey(raw::Key),
+    /// The scriptSigs for the unsigned transaction must be empty.
+    UnsignedTxHasScriptSigs,
+    /// The scriptWitnesses for the unsigned transaction must be empty.
+    UnsignedTxHasScriptWitnesses,
+    /// A PSBT must have an unsigned transaction.
+    MustHaveUnsignedTx,
+    /// Signals that there are no more key-value pairs in a key-value map.
+    NoMorePairs,
+    /// Attempting to combine with a PSBT describing a different unsigned
+    /// transaction.
+    UnexpectedUnsignedTx {
+        /// Expected
+        expected: Box<Transaction>,
+        /// Actual
+        actual: Box<Transaction>,
+    },
+    /// Unable to parse as a standard sighash type.
+    NonStandardSighashType(u32),
+    /// Parsing errors from bitcoin_hashes
+    HashParse(hashes::Error),
+    /// The pre-image must hash to the correponding psbt hash
+    InvalidPreimageHashPair {
+        /// Hash-type
+        hash_type: PsbtHash,
+        /// Pre-image
+        preimage: Box<[u8]>,
+        /// Hash value
+        hash: Box<[u8]>,
+    },
+    /// Conflicting data during combine procedure:
+    /// global extended public key has inconsistent key sources
+    CombineInconsistentKeySources(Box<ExtendedPubKey>),
+    /// Serialization error in dash consensus-encoded structures
+    ConsensusEncoding(encode::Error),
+    /// Negative fee
+    NegativeFee,
+    /// Integer overflow in fee calculation
+    FeeOverflow,
+    /// Parsing error indicating invalid public keys
+    InvalidPublicKey(crate::crypto::key::Error),
+    /// Parsing error indicating invalid secp256k1 public keys
+    InvalidSecp256k1PublicKey(secp256k1::Error),
+    /// Parsing error indicating invalid xonly public keys
+    InvalidXOnlyPublicKey,
+    /// Parsing error indicating invalid ECDSA signatures
+    InvalidEcdsaSignature(crate::crypto::ecdsa::Error),
+    /// Parsing error indicating invalid taproot signatures
+    InvalidTaprootSignature(crate::crypto::taproot::Error),
+    /// Parsing error indicating invalid control block
+    InvalidControlBlock,
+    /// Parsing error indicating invalid leaf version
+    InvalidLeafVersion,
+    /// Parsing error indicating a taproot error
+    Taproot(&'static str),
+    /// Taproot tree deserilaization error
+    TapTree(crate::taproot::IncompleteBuilder),
+    /// Error related to an xpub key
+    XPubKey(&'static str),
+    /// Error related to PSBT version
+    Version(&'static str),
+    /// PSBT data is not consumed entirely
+    PartialDataConsumption,
+    /// I/O error.
+    Io(io::Error),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Error::InvalidMagic => f.write_str("invalid magic"),
+            Error::MissingUtxo => f.write_str("UTXO information is not present in PSBT"),
+            Error::InvalidSeparator => f.write_str("invalid separator"),
+            Error::PsbtUtxoOutOfbounds =>
+                f.write_str("output index is out of bounds of non witness script output array"),
+            Error::InvalidKey(ref rkey) => write!(f, "invalid key: {}", rkey),
+            Error::InvalidProprietaryKey =>
+                write!(f, "non-proprietary key type found when proprietary key was expected"),
+            Error::DuplicateKey(ref rkey) => write!(f, "duplicate key: {}", rkey),
+            Error::UnsignedTxHasScriptSigs =>
+                f.write_str("the unsigned transaction has script sigs"),
+            Error::UnsignedTxHasScriptWitnesses =>
+                f.write_str("the unsigned transaction has script witnesses"),
+            Error::MustHaveUnsignedTx =>
+                f.write_str("partially signed transactions must have an unsigned transaction"),
+            Error::NoMorePairs => f.write_str("no more key-value pairs for this psbt map"),
+            Error::UnexpectedUnsignedTx { expected: ref e, actual: ref a } => write!(
+                f,
+                "different unsigned transaction: expected {}, actual {}",
+                e.txid(),
+                a.txid()
+            ),
+            Error::NonStandardSighashType(ref sht) =>
+                write!(f, "non-standard sighash type: {}", sht),
+            Error::HashParse(ref e) => write_err!(f, "hash parse error"; e),
+            Error::InvalidPreimageHashPair { ref preimage, ref hash, ref hash_type } => {
+                // directly using debug forms of psbthash enums
+                write!(f, "Preimage {:?} does not match {:?} hash {:?}", preimage, hash_type, hash)
+            }
+            Error::CombineInconsistentKeySources(ref s) => {
+                write!(f, "combine conflict: {}", s)
+            }
+            Error::ConsensusEncoding(ref e) => write_err!(f, "dash consensus encoding error"; e),
+            Error::NegativeFee => f.write_str("PSBT has a negative fee which is not allowed"),
+            Error::FeeOverflow => f.write_str("integer overflow in fee calculation"),
+            Error::InvalidPublicKey(ref e) => write_err!(f, "invalid public key"; e),
+            Error::InvalidSecp256k1PublicKey(ref e) =>
+                write_err!(f, "invalid secp256k1 public key"; e),
+            Error::InvalidXOnlyPublicKey => f.write_str("invalid xonly public key"),
+            Error::InvalidEcdsaSignature(ref e) => write_err!(f, "invalid ECDSA signature"; e),
+            Error::InvalidTaprootSignature(ref e) => write_err!(f, "invalid taproot signature"; e),
+            Error::InvalidControlBlock => f.write_str("invalid control block"),
+            Error::InvalidLeafVersion => f.write_str("invalid leaf version"),
+            Error::Taproot(s) => write!(f, "taproot error -  {}", s),
+            Error::TapTree(ref e) => write_err!(f, "taproot tree error"; e),
+            Error::XPubKey(s) => write!(f, "xpub key error -  {}", s),
+            Error::Version(s) => write!(f, "version error {}", s),
+            Error::PartialDataConsumption =>
+                f.write_str("data not consumed entirely when explicitly deserializing"),
+            Error::Io(ref e) => write_err!(f, "I/O error"; e),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match self {
+            HashParse(e) => Some(e),
+            ConsensusEncoding(e) => Some(e),
+            Io(e) => Some(e),
+            InvalidMagic
+            | MissingUtxo
+            | InvalidSeparator
+            | PsbtUtxoOutOfbounds
+            | InvalidKey(_)
+            | InvalidProprietaryKey
+            | DuplicateKey(_)
+            | UnsignedTxHasScriptSigs
+            | UnsignedTxHasScriptWitnesses
+            | MustHaveUnsignedTx
+            | NoMorePairs
+            | UnexpectedUnsignedTx { .. }
+            | NonStandardSighashType(_)
+            | InvalidPreimageHashPair { .. }
+            | CombineInconsistentKeySources(_)
+            | NegativeFee
+            | FeeOverflow
+            | InvalidPublicKey(_)
+            | InvalidSecp256k1PublicKey(_)
+            | InvalidXOnlyPublicKey
+            | InvalidEcdsaSignature(_)
+            | InvalidTaprootSignature(_)
+            | InvalidControlBlock
+            | InvalidLeafVersion
+            | Taproot(_)
+            | TapTree(_)
+            | XPubKey(_)
+            | Version(_)
+            | PartialDataConsumption => None,
+        }
+    }
+}
+
+#[doc(hidden)]
+impl From<hashes::Error> for Error {
+    fn from(e: hashes::Error) -> Error { Error::HashParse(e) }
+}
+
+impl From<encode::Error> for Error {
+    fn from(e: encode::Error) -> Self { Error::ConsensusEncoding(e) }
+}
+
+impl From<io::Error> for Error {
+    fn from(e: io::Error) -> Self { Error::Io(e) }
+}
diff --git a/dash/src/psbt/macros.rs b/dash/src/psbt/macros.rs
new file mode 100644
index 000000000..187d0eeff
--- /dev/null
+++ b/dash/src/psbt/macros.rs
@@ -0,0 +1,172 @@
+// SPDX-License-Identifier: CC0-1.0
+
+#[allow(unused_macros)]
+macro_rules! hex_psbt {
+    ($s:expr) => {
+        <$crate::psbt::PartiallySignedTransaction>::deserialize(
+            &<$crate::prelude::Vec<u8> as $crate::hashes::hex::FromHex>::from_hex($s).unwrap(),
+        )
+    };
+}
+
+macro_rules! combine {
+    ($thing:ident, $slf:ident, $other:ident) => {
+        if let (&None, Some($thing)) = (&$slf.$thing, $other.$thing) {
+            $slf.$thing = Some($thing);
+        }
+    };
+}
+
+macro_rules! impl_psbt_de_serialize {
+    ($thing:ty) => {
+        impl_psbt_serialize!($thing);
+        impl_psbt_deserialize!($thing);
+    };
+}
+
+macro_rules! impl_psbt_deserialize {
+    ($thing:ty) => {
+        impl $crate::psbt::serialize::Deserialize for $thing {
+            fn deserialize(bytes: &[u8]) -> Result<Self, $crate::psbt::Error> {
+                $crate::consensus::deserialize(&bytes[..]).map_err(|e| $crate::psbt::Error::from(e))
+            }
+        }
+    };
+}
+
+macro_rules! impl_psbt_serialize {
+    ($thing:ty) => {
+        impl $crate::psbt::serialize::Serialize for $thing {
+            fn serialize(&self) -> $crate::prelude::Vec<u8> { $crate::consensus::serialize(self) }
+        }
+    };
+}
+
+macro_rules! impl_psbtmap_serialize {
+    ($thing:ty) => {
+        impl $crate::psbt::serialize::Serialize for $thing {
+            fn serialize(&self) -> Vec<u8> { self.serialize_map() }
+        }
+    };
+}
+
+macro_rules! impl_psbtmap_deserialize {
+    ($thing:ty) => {
+        impl $crate::psbt::serialize::Deserialize for $thing {
+            fn deserialize(bytes: &[u8]) -> Result<Self, $crate::psbt::Error> {
+                let mut decoder = bytes;
+                Self::decode(&mut decoder)
+            }
+        }
+    };
+}
+
+macro_rules! impl_psbtmap_decoding {
+    ($thing:ty) => {
+        impl $thing {
+            pub(crate) fn decode<R: $crate::io::Read + ?Sized>(
+                r: &mut R,
+            ) -> Result<Self, $crate::psbt::Error> {
+                let mut rv: Self = core::default::Default::default();
+
+                loop {
+                    match $crate::psbt::raw::Pair::decode(r) {
+                        Ok(pair) => rv.insert_pair(pair)?,
+                        Err($crate::psbt::Error::NoMorePairs) => return Ok(rv),
+                        Err(e) => return Err(e),
+                    }
+                }
+            }
+        }
+    };
+}
+
+macro_rules! impl_psbtmap_ser_de_serialize {
+    ($thing:ty) => {
+        impl_psbtmap_decoding!($thing);
+        impl_psbtmap_serialize!($thing);
+        impl_psbtmap_deserialize!($thing);
+    };
+}
+
+#[rustfmt::skip]
+macro_rules! impl_psbt_insert_pair {
+    ($slf:ident.$unkeyed_name:ident <= <$raw_key:ident: _>|<$raw_value:ident: $unkeyed_value_type:ty>) => {
+        if $raw_key.key.is_empty() {
+            if $slf.$unkeyed_name.is_none() {
+                let val: $unkeyed_value_type = $crate::psbt::serialize::Deserialize::deserialize(&$raw_value)?;
+                $slf.$unkeyed_name = Some(val)
+            } else {
+                return Err($crate::psbt::Error::DuplicateKey($raw_key).into());
+            }
+        } else {
+            return Err($crate::psbt::Error::InvalidKey($raw_key).into());
+        }
+    };
+    ($slf:ident.$keyed_name:ident <= <$raw_key:ident: $keyed_key_type:ty>|<$raw_value:ident: $keyed_value_type:ty>) => {
+        if !$raw_key.key.is_empty() {
+            let key_val: $keyed_key_type = $crate::psbt::serialize::Deserialize::deserialize(&$raw_key.key)?;
+            match $slf.$keyed_name.entry(key_val) {
+                $crate::prelude::btree_map::Entry::Vacant(empty_key) => {
+                    let val: $keyed_value_type = $crate::psbt::serialize::Deserialize::deserialize(&$raw_value)?;
+                    empty_key.insert(val);
+                }
+                $crate::prelude::btree_map::Entry::Occupied(_) => return Err($crate::psbt::Error::DuplicateKey($raw_key).into()),
+            }
+        } else {
+            return Err($crate::psbt::Error::InvalidKey($raw_key).into());
+        }
+    };
+}
+
+#[rustfmt::skip]
+macro_rules! impl_psbt_get_pair {
+    ($rv:ident.push($slf:ident.$unkeyed_name:ident, $unkeyed_typeval:ident)) => {
+        if let Some(ref $unkeyed_name) = $slf.$unkeyed_name {
+            $rv.push($crate::psbt::raw::Pair {
+                key: $crate::psbt::raw::Key {
+                    type_value: $unkeyed_typeval,
+                    key: vec![],
+                },
+                value: $crate::psbt::serialize::Serialize::serialize($unkeyed_name),
+            });
+        }
+    };
+    ($rv:ident.push_map($slf:ident.$keyed_name:ident, $keyed_typeval:ident)) => {
+        for (key, val) in &$slf.$keyed_name {
+            $rv.push($crate::psbt::raw::Pair {
+                key: $crate::psbt::raw::Key {
+                    type_value: $keyed_typeval,
+                    key: $crate::psbt::serialize::Serialize::serialize(key),
+                },
+                value: $crate::psbt::serialize::Serialize::serialize(val),
+            });
+        }
+    };
+}
+
+// macros for serde of hashes
+macro_rules! impl_psbt_hash_de_serialize {
+    ($hash_type:ty) => {
+        impl_psbt_hash_serialize!($hash_type);
+        impl_psbt_hash_deserialize!($hash_type);
+    };
+}
+
+macro_rules! impl_psbt_hash_deserialize {
+    ($hash_type:ty) => {
+        impl $crate::psbt::serialize::Deserialize for $hash_type {
+            fn deserialize(bytes: &[u8]) -> Result<Self, $crate::psbt::Error> {
+                <$hash_type>::from_slice(&bytes[..]).map_err(|e| $crate::psbt::Error::from(e))
+            }
+        }
+    };
+}
+
+macro_rules! impl_psbt_hash_serialize {
+    ($hash_type:ty) => {
+        impl $crate::psbt::serialize::Serialize for $hash_type {
+            fn serialize(&self) -> $crate::prelude::Vec<u8> { self.as_byte_array().to_vec() }
+        }
+    };
+}
diff --git a/src/util/psbt/map/global.rs b/dash/src/psbt/map/global.rs
similarity index 64%
rename from src/util/psbt/map/global.rs
rename to dash/src/psbt/map/global.rs
index 4481f054c..858a9c3fa 100644
--- a/src/util/psbt/map/global.rs
+++ b/dash/src/psbt/map/global.rs
@@ -1,30 +1,16 @@
-// Rust Bitcoin Library
-// Written by
-//   The Rust Bitcoin developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-use prelude::*;
-
-use io::{self, Cursor, Read};
-use blockdata::transaction::special_transaction::TransactionType;
-
-use blockdata::transaction::Transaction;
-use consensus::{encode, Encodable, Decodable};
-use consensus::encode::MAX_VEC_SIZE;
-use util::psbt::map::Map;
-use util::psbt::{raw, PartiallySignedTransaction};
-use util::psbt::Error;
-use util::endian::u32_to_array_le;
-use util::bip32::{ExtendedPubKey, Fingerprint, DerivationPath, ChildNumber};
+// SPDX-License-Identifier: CC0-1.0
+
+use core::convert::TryFrom;
+
+use crate::bip32::{ChildNumber, DerivationPath, ExtendedPubKey, Fingerprint};
+use crate::blockdata::transaction::Transaction;
+use crate::consensus::encode::MAX_VEC_SIZE;
+use crate::consensus::{encode, Decodable, Encodable};
+use crate::io::{self, Cursor, Read};
+use crate::prelude::*;
+use crate::psbt::map::Map;
+use crate::psbt::{raw, Error, PartiallySignedTransaction};
+use crate::transaction::special_transaction::TransactionType;
 
 /// Type: Unsigned Transaction PSBT_GLOBAL_UNSIGNED_TX = 0x00
 const PSBT_GLOBAL_UNSIGNED_TX: u8 = 0x00;
@@ -36,81 +22,72 @@ const PSBT_GLOBAL_VERSION: u8 = 0xFB;
 const PSBT_GLOBAL_PROPRIETARY: u8 = 0xFC;
 
 impl Map for PartiallySignedTransaction {
-    fn get_pairs(&self) -> Result<Vec<raw::Pair>, io::Error> {
+    fn get_pairs(&self) -> Vec<raw::Pair> {
         let mut rv: Vec<raw::Pair> = Default::default();
 
         rv.push(raw::Pair {
-            key: raw::Key {
-                type_value: PSBT_GLOBAL_UNSIGNED_TX,
-                key: vec![],
-            },
+            key: raw::Key { type_value: PSBT_GLOBAL_UNSIGNED_TX, key: vec![] },
             value: {
                 // Manually serialized to ensure 0-input txs are serialized
                 // without witnesses.
                 let mut ret = Vec::new();
-                self.unsigned_tx.version.consensus_encode(&mut ret)?;
-                self.unsigned_tx.input.consensus_encode(&mut ret)?;
-                self.unsigned_tx.output.consensus_encode(&mut ret)?;
-                self.unsigned_tx.lock_time.consensus_encode(&mut ret)?;
+                ret.extend(encode::serialize(&self.unsigned_tx.version));
+                (self.unsigned_tx.tx_type() as u16).consensus_encode(&mut ret).expect("can't encode tx type");
+                let input = encode::serialize(&self.unsigned_tx.input);
+                ret.extend(input);
+                ret.extend(encode::serialize(&self.unsigned_tx.output));
+                ret.extend(encode::serialize(&self.unsigned_tx.lock_time));
+                if let Some(payload) = &self.unsigned_tx.special_transaction_payload {
+                    payload.consensus_encode(&mut ret).expect("can't encode special tx payload");
+                }
                 ret
             },
         });
 
         for (xpub, (fingerprint, derivation)) in &self.xpub {
             rv.push(raw::Pair {
-                key: raw::Key {
-                    type_value: PSBT_GLOBAL_XPUB,
-                    key: xpub.encode().to_vec(),
-                },
+                key: raw::Key { type_value: PSBT_GLOBAL_XPUB, key: xpub.encode().to_vec() },
                 value: {
                     let mut ret = Vec::with_capacity(4 + derivation.len() * 4);
                     ret.extend(fingerprint.as_bytes());
-                    derivation.into_iter().for_each(|n| ret.extend(&u32_to_array_le((*n).into())));
+                    derivation.into_iter().for_each(|n| ret.extend(&u32::from(*n).to_le_bytes()));
                     ret
-                }
+                },
             });
         }
 
         // Serializing version only for non-default value; otherwise test vectors fail
         if self.version > 0 {
             rv.push(raw::Pair {
-                key: raw::Key {
-                    type_value: PSBT_GLOBAL_VERSION,
-                    key: vec![],
-                },
-                value: u32_to_array_le(self.version).to_vec()
+                key: raw::Key { type_value: PSBT_GLOBAL_VERSION, key: vec![] },
+                value: self.version.to_le_bytes().to_vec(),
             });
         }
 
         for (key, value) in self.proprietary.iter() {
-            rv.push(raw::Pair {
-                key: key.to_key(),
-                value: value.clone(),
-            });
+            rv.push(raw::Pair { key: key.to_key(), value: value.clone() });
         }
 
         for (key, value) in self.unknown.iter() {
-            rv.push(raw::Pair {
-                key: key.clone(),
-                value: value.clone(),
-            });
+            rv.push(raw::Pair { key: key.clone(), value: value.clone() });
         }
 
-        Ok(rv)
+        rv
     }
 }
 
 impl PartiallySignedTransaction {
-    pub(crate) fn consensus_decode_global<D: io::Read>(d: D) -> Result<Self, encode::Error> {
-        let mut d = d.take(MAX_VEC_SIZE as u64);
+    pub(crate) fn decode_global<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        let mut r = r.take(MAX_VEC_SIZE as u64);
         let mut tx: Option<Transaction> = None;
         let mut version: Option<u32> = None;
         let mut unknowns: BTreeMap<raw::Key, Vec<u8>> = Default::default();
-        let mut xpub_map: BTreeMap<ExtendedPubKey, (Fingerprint, DerivationPath)> = Default::default();
+        let mut xpub_map: BTreeMap<ExtendedPubKey, (Fingerprint, DerivationPath)> =
+            Default::default();
         let mut proprietary: BTreeMap<raw::ProprietaryKey, Vec<u8>> = Default::default();
 
         loop {
-            match raw::Pair::consensus_decode(&mut d) {
+            match raw::Pair::decode(&mut r) {
                 Ok(pair) => {
                     match pair.key.type_value {
                         PSBT_GLOBAL_UNSIGNED_TX => {
@@ -120,16 +97,15 @@ impl PartiallySignedTransaction {
                                 if tx.is_none() {
                                     let vlen: usize = pair.value.len();
                                     let mut decoder = Cursor::new(pair.value);
-
-                                    // Manually deserialized to ensure 0-input
-                                    // txs without witnesses are deserialized
-                                    // properly.
                                     let version = Decodable::consensus_decode(&mut decoder)?;
                                     let transaction_type: TransactionType = Decodable::consensus_decode(&mut decoder)?;
                                     let input = Decodable::consensus_decode(&mut decoder)?;
                                     let output = Decodable::consensus_decode(&mut decoder)?;
                                     let lock_time = Decodable::consensus_decode(&mut decoder)?;
 
+                                    // Manually deserialized to ensure 0-input
+                                    // txs without witnesses are deserialized
+                                    // properly.
                                     tx = Some(Transaction {
                                         version,
                                         lock_time,
@@ -139,41 +115,50 @@ impl PartiallySignedTransaction {
                                     });
 
                                     if decoder.position() != vlen as u64 {
-                                        return Err(encode::Error::ParseFailed("data not consumed entirely when explicitly deserializing"))
+                                        return Err(Error::PartialDataConsumption);
                                     }
                                 } else {
-                                    return Err(Error::DuplicateKey(pair.key).into())
+                                    return Err(Error::DuplicateKey(pair.key));
                                 }
                             } else {
-                                return Err(Error::InvalidKey(pair.key).into())
+                                return Err(Error::InvalidKey(pair.key));
                             }
                         }
                         PSBT_GLOBAL_XPUB => {
                             if !pair.key.key.is_empty() {
                                 let xpub = ExtendedPubKey::decode(&pair.key.key)
-                                    .map_err(|_| encode::Error::ParseFailed(
+                                    .map_err(|_| Error::XPubKey(
                                         "Can't deserialize ExtendedPublicKey from global XPUB key data"
                                     ))?;
 
                                 if pair.value.is_empty() || pair.value.len() % 4 != 0 {
-                                    return Err(encode::Error::ParseFailed("Incorrect length of global xpub derivation data"))
+                                    return Err(Error::XPubKey(
+                                        "Incorrect length of global xpub derivation data",
+                                    ));
                                 }
 
                                 let child_count = pair.value.len() / 4 - 1;
                                 let mut decoder = Cursor::new(pair.value);
                                 let mut fingerprint = [0u8; 4];
-                                decoder.read_exact(&mut fingerprint[..])?;
+                                decoder.read_exact(&mut fingerprint[..]).map_err(|_| {
+                                    Error::XPubKey("Can't read global xpub fingerprint")
+                                })?;
                                 let mut path = Vec::<ChildNumber>::with_capacity(child_count);
                                 while let Ok(index) = u32::consensus_decode(&mut decoder) {
                                     path.push(ChildNumber::from(index))
                                 }
                                 let derivation = DerivationPath::from(path);
                                 // Keys, according to BIP-174, must be unique
-                                if xpub_map.insert(xpub, (Fingerprint::from(&fingerprint[..]), derivation)).is_some() {
-                                    return Err(encode::Error::ParseFailed("Repeated global xpub key"))
+                                if xpub_map
+                                    .insert(xpub, (Fingerprint::from(fingerprint), derivation))
+                                    .is_some()
+                                {
+                                    return Err(Error::XPubKey("Repeated global xpub key"));
                                 }
                             } else {
-                                return Err(encode::Error::ParseFailed("Xpub global key must contain serialized Xpub data"))
+                                return Err(Error::XPubKey(
+                                    "Xpub global key must contain serialized Xpub data",
+                                ));
                             }
                         }
                         PSBT_GLOBAL_VERSION => {
@@ -184,36 +169,44 @@ impl PartiallySignedTransaction {
                                     let vlen: usize = pair.value.len();
                                     let mut decoder = Cursor::new(pair.value);
                                     if vlen != 4 {
-                                        return Err(encode::Error::ParseFailed("Wrong global version value length (must be 4 bytes)"))
+                                        return Err(Error::Version(
+                                            "invalid global version value length (must be 4 bytes)",
+                                        ));
                                     }
                                     version = Some(Decodable::consensus_decode(&mut decoder)?);
                                     // We only understand version 0 PSBTs. According to BIP-174 we
                                     // should throw an error if we see anything other than version 0.
                                     if version != Some(0) {
-                                        return Err(encode::Error::ParseFailed("PSBT versions greater than 0 are not supported"))
+                                        return Err(Error::Version(
+                                            "PSBT versions greater than 0 are not supported",
+                                        ));
                                     }
                                 } else {
-                                    return Err(Error::DuplicateKey(pair.key).into())
+                                    return Err(Error::DuplicateKey(pair.key));
                                 }
                             } else {
-                                return Err(Error::InvalidKey(pair.key).into())
+                                return Err(Error::InvalidKey(pair.key));
                             }
                         }
-                        PSBT_GLOBAL_PROPRIETARY => match proprietary.entry(raw::ProprietaryKey::from_key(pair.key.clone())?) {
+                        PSBT_GLOBAL_PROPRIETARY => match proprietary
+                            .entry(raw::ProprietaryKey::try_from(pair.key.clone())?)
+                        {
                             btree_map::Entry::Vacant(empty_key) => {
                                 empty_key.insert(pair.value);
-                            },
-                            btree_map::Entry::Occupied(_) => return Err(Error::DuplicateKey(pair.key).into()),
-                        }
+                            }
+                            btree_map::Entry::Occupied(_) =>
+                                return Err(Error::DuplicateKey(pair.key)),
+                        },
                         _ => match unknowns.entry(pair.key) {
                             btree_map::Entry::Vacant(empty_key) => {
                                 empty_key.insert(pair.value);
-                            },
-                            btree_map::Entry::Occupied(k) => return Err(Error::DuplicateKey(k.key().clone()).into()),
-                        }
+                            }
+                            btree_map::Entry::Occupied(k) =>
+                                return Err(Error::DuplicateKey(k.key().clone())),
+                        },
                     }
                 }
-                Err(::consensus::encode::Error::Psbt(::util::psbt::Error::NoMorePairs)) => break,
+                Err(crate::psbt::Error::NoMorePairs) => break,
                 Err(e) => return Err(e),
             }
         }
@@ -226,10 +219,10 @@ impl PartiallySignedTransaction {
                 proprietary,
                 unknown: unknowns,
                 inputs: vec![],
-                outputs: vec![]
+                outputs: vec![],
             })
         } else {
-            Err(Error::MustHaveUnsignedTx.into())
+            Err(Error::MustHaveUnsignedTx)
         }
     }
 }
diff --git a/src/util/psbt/map/input.rs b/dash/src/psbt/map/input.rs
similarity index 70%
rename from src/util/psbt/map/input.rs
rename to dash/src/psbt/map/input.rs
index db2a3fbbe..e91c85d2e 100644
--- a/src/util/psbt/map/input.rs
+++ b/dash/src/psbt/map/input.rs
@@ -1,41 +1,26 @@
-// Rust Bitcoin Library
-// Written by
-//   The Rust Bitcoin developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-use prelude::*;
-use io;
+// SPDX-License-Identifier: CC0-1.0
+
+use core::convert::TryFrom;
 use core::fmt;
 use core::str::FromStr;
 
-use secp256k1;
-use blockdata::script::Script;
-use blockdata::witness::Witness;
-use blockdata::transaction::{Transaction, txout::TxOut, hash_type::NonStandardSighashType};
-use consensus::encode;
 use hashes::{self, hash160, ripemd160, sha256, sha256d};
 use secp256k1::XOnlyPublicKey;
-use util::bip32::KeySource;
-use util::psbt;
-use util::psbt::map::Map;
-use util::psbt::raw;
-use util::psbt::serialize::Deserialize;
-use util::psbt::{Error, error};
-use util::key::PublicKey;
-
-use util::taproot::{ControlBlock, LeafVersion, TapLeafHash, TapBranchHash};
-use util::sighash;
-use {SchnorrSighashType, EcdsaSig, SchnorrSig};
-use blockdata::transaction::hash_type::{EcdsaSighashType, SighashTypeParseError};
+
+use crate::bip32::KeySource;
+use crate::blockdata::script::ScriptBuf;
+use crate::blockdata::transaction::{Transaction, txout::TxOut};
+use crate::blockdata::witness::Witness;
+use crate::crypto::key::PublicKey;
+use crate::crypto::{ecdsa, taproot};
+use crate::prelude::*;
+use crate::psbt::map::Map;
+use crate::psbt::serialize::Deserialize;
+use crate::psbt::{self, error, raw, Error};
+use crate::sighash::{
+    self, EcdsaSighashType, NonStandardSighashType, SighashTypeParseError, TapSighashType,
+};
+use crate::taproot::{ControlBlock, LeafVersion, TapLeafHash, TapNodeHash};
 
 /// Type: Non-Witness UTXO PSBT_IN_NON_WITNESS_UTXO = 0x00
 const PSBT_IN_NON_WITNESS_UTXO: u8 = 0x00;
@@ -63,9 +48,9 @@ const PSBT_IN_SHA256: u8 = 0x0b;
 const PSBT_IN_HASH160: u8 = 0x0c;
 /// Type: HASH256 preimage PSBT_IN_HASH256 = 0x0d
 const PSBT_IN_HASH256: u8 = 0x0d;
-/// Type: Schnorr Signature in Key Spend PSBT_IN_TAP_KEY_SIG = 0x13
+/// Type: Taproot Signature in Key Spend PSBT_IN_TAP_KEY_SIG = 0x13
 const PSBT_IN_TAP_KEY_SIG: u8 = 0x13;
-/// Type: Schnorr Signature in Script Spend PSBT_IN_TAP_SCRIPT_SIG = 0x14
+/// Type: Taproot Signature in Script Spend PSBT_IN_TAP_SCRIPT_SIG = 0x14
 const PSBT_IN_TAP_SCRIPT_SIG: u8 = 0x14;
 /// Type: Taproot Leaf Script PSBT_IN_TAP_LEAF_SCRIPT = 0x14
 const PSBT_IN_TAP_LEAF_SCRIPT: u8 = 0x15;
@@ -80,8 +65,9 @@ const PSBT_IN_PROPRIETARY: u8 = 0xFC;
 
 /// A key-value map for an input of the corresponding index in the unsigned
 /// transaction.
-#[derive(Clone, Default, Debug, PartialEq, Eq)]
+#[derive(Clone, Default, Debug, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct Input {
     /// The non-witness transaction this input spends from. Should only be
     /// [std::option::Option::Some] for inputs which spend non-segwit outputs or
@@ -93,81 +79,80 @@ pub struct Input {
     pub witness_utxo: Option<TxOut>,
     /// A map from public keys to their corresponding signature as would be
     /// pushed to the stack from a scriptSig or witness for a non-taproot inputs.
-    pub partial_sigs: BTreeMap<PublicKey, EcdsaSig>,
+    pub partial_sigs: BTreeMap<PublicKey, ecdsa::Signature>,
     /// The sighash type to be used for this input. Signatures for this input
     /// must use the sighash type.
     pub sighash_type: Option<PsbtSighashType>,
     /// The redeem script for this input.
-    pub redeem_script: Option<Script>,
+    pub redeem_script: Option<ScriptBuf>,
     /// The witness script for this input.
-    pub witness_script: Option<Script>,
+    pub witness_script: Option<ScriptBuf>,
     /// A map from public keys needed to sign this input to their corresponding
     /// master key fingerprints and derivation paths.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq"))]
     pub bip32_derivation: BTreeMap<secp256k1::PublicKey, KeySource>,
     /// The finalized, fully-constructed scriptSig with signatures and any other
     /// scripts necessary for this input to pass validation.
-    pub final_script_sig: Option<Script>,
+    pub final_script_sig: Option<ScriptBuf>,
     /// The finalized, fully-constructed scriptWitness with signatures and any
     /// other scripts necessary for this input to pass validation.
     pub final_script_witness: Option<Witness>,
     /// TODO: Proof of reserves commitment
     /// RIPEMD160 hash to preimage map.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_byte_values"))]
     pub ripemd160_preimages: BTreeMap<ripemd160::Hash, Vec<u8>>,
     /// SHA256 hash to preimage map.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_byte_values"))]
     pub sha256_preimages: BTreeMap<sha256::Hash, Vec<u8>>,
     /// HSAH160 hash to preimage map.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_byte_values"))]
     pub hash160_preimages: BTreeMap<hash160::Hash, Vec<u8>>,
     /// HAS256 hash to preimage map.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_byte_values"))]
     pub hash256_preimages: BTreeMap<sha256d::Hash, Vec<u8>>,
-    /// Serialized schnorr signature with sighash type for key spend.
-    pub tap_key_sig: Option<SchnorrSig>,
-    /// Map of <xonlypubkey>|<leafhash> with signature.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
-    pub tap_script_sigs: BTreeMap<(XOnlyPublicKey, TapLeafHash), SchnorrSig>,
+    /// Serialized taproot signature with sighash type for key spend.
+    pub tap_key_sig: Option<taproot::Signature>,
+    /// Map of `<xonlypubkey>|<leafhash>` with signature.
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq"))]
+    pub tap_script_sigs: BTreeMap<(XOnlyPublicKey, TapLeafHash), taproot::Signature>,
     /// Map of Control blocks to Script version pair.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
-    pub tap_scripts: BTreeMap<ControlBlock, (Script, LeafVersion)>,
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq"))]
+    pub tap_scripts: BTreeMap<ControlBlock, (ScriptBuf, LeafVersion)>,
     /// Map of tap root x only keys to origin info and leaf hashes contained in it.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq"))]
     pub tap_key_origins: BTreeMap<XOnlyPublicKey, (Vec<TapLeafHash>, KeySource)>,
     /// Taproot Internal key.
     pub tap_internal_key: Option<XOnlyPublicKey>,
     /// Taproot Merkle root.
-    pub tap_merkle_root: Option<TapBranchHash>,
+    pub tap_merkle_root: Option<TapNodeHash>,
     /// Proprietary key-value pairs for this input.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq_byte_values"))]
     pub proprietary: BTreeMap<raw::ProprietaryKey, Vec<u8>>,
     /// Unknown key-value pairs for this input.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq_byte_values"))]
     pub unknown: BTreeMap<raw::Key, Vec<u8>>,
 }
 
-
 /// A Signature hash type for the corresponding input. As of taproot upgrade, the signature hash
-/// type can be either [`EcdsaSighashType`] or [`SchnorrSighashType`] but it is not possible to know
+/// type can be either [`EcdsaSighashType`] or [`TapSighashType`] but it is not possible to know
 /// directly which signature hash type the user is dealing with. Therefore, the user is responsible
 /// for converting to/from [`PsbtSighashType`] from/to the desired signature hash type they need.
 #[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct PsbtSighashType {
-    pub (in ::util::psbt) inner: u32,
+    pub(in crate::psbt) inner: u32,
 }
 
 impl fmt::Display for PsbtSighashType {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self.schnorr_hash_ty() {
-            Ok(SchnorrSighashType::Reserved) | Err(_) => write!(f, "{:#x}", self.inner),
-            Ok(schnorr_hash_ty) => fmt::Display::fmt(&schnorr_hash_ty, f),
+        match self.taproot_hash_ty() {
+            Err(_) => write!(f, "{:#x}", self.inner),
+            Ok(taproot_hash_ty) => fmt::Display::fmt(&taproot_hash_ty, f),
         }
     }
 }
 
-#[allow(deprecated)]  // TODO: Swap `trim_left_matches` for `trim_start_matches` once MSRV >= 1.30.
 impl FromStr for PsbtSighashType {
     type Err = SighashTypeParseError;
 
@@ -175,21 +160,19 @@ impl FromStr for PsbtSighashType {
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         // We accept strings of form: "SIGHASH_ALL" etc.
         //
-        // NB: some of Schnorr sighash types are non-standard for pre-taproot
+        // NB: some of Taproot sighash types are non-standard for pre-taproot
         // inputs. We also do not support SIGHASH_RESERVED in verbatim form
         // ("0xFF" string should be used instead).
-        match SchnorrSighashType::from_str(s) {
-            Ok(SchnorrSighashType::Reserved) => return Err(SighashTypeParseError{ unrecognized: s.to_owned() }),
-            Ok(ty) => return Ok(ty.into()),
-            Err(_) => {}
+        if let Ok(ty) = TapSighashType::from_str(s) {
+            return Ok(ty.into());
         }
 
         // We accept non-standard sighash values.
-        if let Ok(inner) = u32::from_str_radix(s.trim_left_matches("0x"), 16) {
+        if let Ok(inner) = u32::from_str_radix(s.trim_start_matches("0x"), 16) {
             return Ok(PsbtSighashType { inner });
         }
 
-        Err(SighashTypeParseError{ unrecognized: s.to_owned() })
+        Err(SighashTypeParseError { unrecognized: s.to_owned() })
     }
 }
 impl From<EcdsaSighashType> for PsbtSighashType {
@@ -198,9 +181,9 @@ impl From<EcdsaSighashType> for PsbtSighashType {
     }
 }
 
-impl From<SchnorrSighashType> for PsbtSighashType {
-    fn from(schnorr_hash_ty: SchnorrSighashType) -> Self {
-        PsbtSighashType { inner: schnorr_hash_ty as u32 }
+impl From<TapSighashType> for PsbtSighashType {
+    fn from(taproot_hash_ty: TapSighashType) -> Self {
+        PsbtSighashType { inner: taproot_hash_ty as u32 }
     }
 }
 
@@ -211,31 +194,26 @@ impl PsbtSighashType {
         EcdsaSighashType::from_standard(self.inner)
     }
 
-    /// Returns the [`SchnorrSighashType`] if the [`PsbtSighashType`] can be
+    /// Returns the [`TapSighashType`] if the [`PsbtSighashType`] can be
     /// converted to one.
-    pub fn schnorr_hash_ty(self) -> Result<SchnorrSighashType, sighash::Error> {
+    pub fn taproot_hash_ty(self) -> Result<TapSighashType, sighash::Error> {
         if self.inner > 0xffu32 {
             Err(sighash::Error::InvalidSighashType(self.inner))
         } else {
-            SchnorrSighashType::from_u8(self.inner as u8)
+            TapSighashType::from_consensus_u8(self.inner as u8)
         }
     }
 
     /// Creates a [`PsbtSighashType`] from a raw `u32`.
     ///
     /// Allows construction of a non-standard or non-valid sighash flag
-    /// ([`EcdsaSighashType`], [`SchnorrSighashType`] respectively).
-    pub fn from_u32(n: u32) -> PsbtSighashType {
-        PsbtSighashType { inner: n }
-    }
-
+    /// ([`EcdsaSighashType`], [`TapSighashType`] respectively).
+    pub fn from_u32(n: u32) -> PsbtSighashType { PsbtSighashType { inner: n } }
 
     /// Converts [`PsbtSighashType`] to a raw `u32` sighash flag.
     ///
     /// No guarantees are made as to the standardness or validity of the returned value.
-    pub fn to_u32(self) -> u32 {
-        self.inner
-    }
+    pub fn to_u32(self) -> u32 { self.inner }
 }
 
 impl Input {
@@ -251,23 +229,20 @@ impl Input {
             .unwrap_or(Ok(EcdsaSighashType::All))
     }
 
-    /// Obtains the [`SchnorrSighashType`] for this input if one is specified. If no sighash type is
-    /// specified, returns [`SchnorrSighashType::Default`].
+    /// Obtains the [`TapSighashType`] for this input if one is specified. If no sighash type is
+    /// specified, returns [`TapSighashType::Default`].
     ///
     /// # Errors
     ///
-    /// If the `sighash_type` field is set to a invalid Schnorr sighash value.
-    pub fn schnorr_hash_ty(&self) -> Result<SchnorrSighashType, sighash::Error> {
+    /// If the `sighash_type` field is set to a invalid Taproot sighash value.
+    pub fn taproot_hash_ty(&self) -> Result<TapSighashType, sighash::Error> {
         self.sighash_type
-            .map(|sighash_type| sighash_type.schnorr_hash_ty())
-            .unwrap_or(Ok(SchnorrSighashType::Default))
+            .map(|sighash_type| sighash_type.taproot_hash_ty())
+            .unwrap_or(Ok(TapSighashType::Default))
     }
 
-    pub(super) fn insert_pair(&mut self, pair: raw::Pair) -> Result<(), encode::Error> {
-        let raw::Pair {
-            key: raw_key,
-            value: raw_value,
-        } = pair;
+    pub(super) fn insert_pair(&mut self, pair: raw::Pair) -> Result<(), Error> {
+        let raw::Pair { key: raw_key, value: raw_value } = pair;
 
         match raw_key.type_value {
             PSBT_IN_NON_WITNESS_UTXO => {
@@ -282,7 +257,7 @@ impl Input {
             }
             PSBT_IN_PARTIAL_SIG => {
                 impl_psbt_insert_pair! {
-                    self.partial_sigs <= <raw_key: PublicKey>|<raw_value: EcdsaSig>
+                    self.partial_sigs <= <raw_key: PublicKey>|<raw_value: ecdsa::Signature>
                 }
             }
             PSBT_IN_SIGHASH_TYPE => {
@@ -292,12 +267,12 @@ impl Input {
             }
             PSBT_IN_REDEEM_SCRIPT => {
                 impl_psbt_insert_pair! {
-                    self.redeem_script <= <raw_key: _>|<raw_value: Script>
+                    self.redeem_script <= <raw_key: _>|<raw_value: ScriptBuf>
                 }
             }
             PSBT_IN_WITNESS_SCRIPT => {
                 impl_psbt_insert_pair! {
-                    self.witness_script <= <raw_key: _>|<raw_value: Script>
+                    self.witness_script <= <raw_key: _>|<raw_value: ScriptBuf>
                 }
             }
             PSBT_IN_BIP32_DERIVATION => {
@@ -307,7 +282,7 @@ impl Input {
             }
             PSBT_IN_FINAL_SCRIPTSIG => {
                 impl_psbt_insert_pair! {
-                    self.final_script_sig <= <raw_key: _>|<raw_value: Script>
+                    self.final_script_sig <= <raw_key: _>|<raw_value: ScriptBuf>
                 }
             }
             PSBT_IN_FINAL_SCRIPTWITNESS => {
@@ -316,30 +291,50 @@ impl Input {
                 }
             }
             PSBT_IN_RIPEMD160 => {
-                psbt_insert_hash_pair(&mut self.ripemd160_preimages, raw_key, raw_value, error::PsbtHash::Ripemd)?;
+                psbt_insert_hash_pair(
+                    &mut self.ripemd160_preimages,
+                    raw_key,
+                    raw_value,
+                    error::PsbtHash::Ripemd,
+                )?;
             }
             PSBT_IN_SHA256 => {
-                psbt_insert_hash_pair(&mut self.sha256_preimages, raw_key, raw_value, error::PsbtHash::Sha256)?;
+                psbt_insert_hash_pair(
+                    &mut self.sha256_preimages,
+                    raw_key,
+                    raw_value,
+                    error::PsbtHash::Sha256,
+                )?;
             }
             PSBT_IN_HASH160 => {
-                psbt_insert_hash_pair(&mut self.hash160_preimages, raw_key, raw_value, error::PsbtHash::Hash160)?;
+                psbt_insert_hash_pair(
+                    &mut self.hash160_preimages,
+                    raw_key,
+                    raw_value,
+                    error::PsbtHash::Hash160,
+                )?;
             }
             PSBT_IN_HASH256 => {
-                psbt_insert_hash_pair(&mut self.hash256_preimages, raw_key, raw_value, error::PsbtHash::Hash256)?;
+                psbt_insert_hash_pair(
+                    &mut self.hash256_preimages,
+                    raw_key,
+                    raw_value,
+                    error::PsbtHash::Hash256,
+                )?;
             }
             PSBT_IN_TAP_KEY_SIG => {
                 impl_psbt_insert_pair! {
-                    self.tap_key_sig <= <raw_key: _>|<raw_value: SchnorrSig>
+                    self.tap_key_sig <= <raw_key: _>|<raw_value: taproot::Signature>
                 }
             }
             PSBT_IN_TAP_SCRIPT_SIG => {
                 impl_psbt_insert_pair! {
-                    self.tap_script_sigs <= <raw_key: (XOnlyPublicKey, TapLeafHash)>|<raw_value: SchnorrSig>
+                    self.tap_script_sigs <= <raw_key: (XOnlyPublicKey, TapLeafHash)>|<raw_value: taproot::Signature>
                 }
             }
             PSBT_IN_TAP_LEAF_SCRIPT => {
                 impl_psbt_insert_pair! {
-                    self.tap_scripts <= <raw_key: ControlBlock>|< raw_value: (Script, LeafVersion)>
+                    self.tap_scripts <= <raw_key: ControlBlock>|< raw_value: (ScriptBuf, LeafVersion)>
                 }
             }
             PSBT_IN_TAP_BIP32_DERIVATION => {
@@ -354,23 +349,23 @@ impl Input {
             }
             PSBT_IN_TAP_MERKLE_ROOT => {
                 impl_psbt_insert_pair! {
-                    self.tap_merkle_root <= <raw_key: _>|< raw_value: TapBranchHash>
+                    self.tap_merkle_root <= <raw_key: _>|< raw_value: TapNodeHash>
                 }
             }
             PSBT_IN_PROPRIETARY => {
-                let key = raw::ProprietaryKey::from_key(raw_key.clone())?;
+                let key = raw::ProprietaryKey::try_from(raw_key.clone())?;
                 match self.proprietary.entry(key) {
                     btree_map::Entry::Vacant(empty_key) => {
                         empty_key.insert(raw_value);
-                    },
-                    btree_map::Entry::Occupied(_) => return Err(Error::DuplicateKey(raw_key).into()),
+                    }
+                    btree_map::Entry::Occupied(_) => return Err(Error::DuplicateKey(raw_key)),
                 }
             }
             _ => match self.unknown.entry(raw_key) {
                 btree_map::Entry::Vacant(empty_key) => {
                     empty_key.insert(raw_value);
                 }
-                btree_map::Entry::Occupied(k) => return Err(Error::DuplicateKey(k.key().clone()).into()),
+                btree_map::Entry::Occupied(k) => return Err(Error::DuplicateKey(k.key().clone())),
             },
         }
 
@@ -409,7 +404,7 @@ impl Input {
 }
 
 impl Map for Input {
-    fn get_pairs(&self) -> Result<Vec<raw::Pair>, io::Error> {
+    fn get_pairs(&self) -> Vec<raw::Pair> {
         let mut rv: Vec<raw::Pair> = Default::default();
 
         impl_psbt_get_pair! {
@@ -488,36 +483,30 @@ impl Map for Input {
             rv.push(self.tap_merkle_root, PSBT_IN_TAP_MERKLE_ROOT)
         }
         for (key, value) in self.proprietary.iter() {
-            rv.push(raw::Pair {
-                key: key.to_key(),
-                value: value.clone(),
-            });
+            rv.push(raw::Pair { key: key.to_key(), value: value.clone() });
         }
 
         for (key, value) in self.unknown.iter() {
-            rv.push(raw::Pair {
-                key: key.clone(),
-                value: value.clone(),
-            });
+            rv.push(raw::Pair { key: key.clone(), value: value.clone() });
         }
 
-        Ok(rv)
+        rv
     }
 }
 
-impl_psbtmap_consensus_enc_dec_oding!(Input);
+impl_psbtmap_ser_de_serialize!(Input);
 
 fn psbt_insert_hash_pair<H>(
     map: &mut BTreeMap<H, Vec<u8>>,
     raw_key: raw::Key,
     raw_value: Vec<u8>,
     hash_type: error::PsbtHash,
-) -> Result<(), encode::Error>
+) -> Result<(), Error>
 where
     H: hashes::Hash + Deserialize,
 {
     if raw_key.key.is_empty() {
-        return Err(psbt::Error::InvalidKey(raw_key).into());
+        return Err(psbt::Error::InvalidKey(raw_key));
     }
     let key_val: H = Deserialize::deserialize(&raw_key.key)?;
     match map.entry(key_val) {
@@ -528,13 +517,12 @@ where
                     preimage: val.into_boxed_slice(),
                     hash: Box::from(key_val.borrow()),
                     hash_type,
-                }
-                .into());
+                });
             }
             empty_key.insert(val);
             Ok(())
         }
-        btree_map::Entry::Occupied(_) => Err(psbt::Error::DuplicateKey(raw_key).into()),
+        btree_map::Entry::Occupied(_) => Err(psbt::Error::DuplicateKey(raw_key)),
     }
 }
 
@@ -561,35 +549,21 @@ mod test {
     }
 
     #[test]
-    fn psbt_sighash_type_schnorr() {
-        for schnorr in &[
-            SchnorrSighashType::Default,
-            SchnorrSighashType::All,
-            SchnorrSighashType::None,
-            SchnorrSighashType::Single,
-            SchnorrSighashType::AllPlusAnyoneCanPay,
-            SchnorrSighashType::NonePlusAnyoneCanPay,
-            SchnorrSighashType::SinglePlusAnyoneCanPay,
-        ] {
-            let sighash = PsbtSighashType::from(*schnorr);
-            let s = format!("{}", sighash);
-            let back = PsbtSighashType::from_str(&s).unwrap();
-            assert_eq!(back, sighash);
-            assert_eq!(back.schnorr_hash_ty().unwrap(), *schnorr);
-        }
-    }
-
-    #[test]
-    fn psbt_sighash_type_schnorr_notstd() {
-        for (schnorr, schnorr_str) in &[
-            (SchnorrSighashType::Reserved, "0xff"),
+    fn psbt_sighash_type_taproot() {
+        for tap in &[
+            TapSighashType::Default,
+            TapSighashType::All,
+            TapSighashType::None,
+            TapSighashType::Single,
+            TapSighashType::AllPlusAnyoneCanPay,
+            TapSighashType::NonePlusAnyoneCanPay,
+            TapSighashType::SinglePlusAnyoneCanPay,
         ] {
-            let sighash = PsbtSighashType::from(*schnorr);
+            let sighash = PsbtSighashType::from(*tap);
             let s = format!("{}", sighash);
-            assert_eq!(&s, schnorr_str);
             let back = PsbtSighashType::from_str(&s).unwrap();
             assert_eq!(back, sighash);
-            assert_eq!(back.schnorr_hash_ty().unwrap(), *schnorr);
+            assert_eq!(back.taproot_hash_ty().unwrap(), *tap);
         }
     }
 
@@ -602,6 +576,6 @@ mod test {
 
         assert_eq!(back, sighash);
         assert_eq!(back.ecdsa_hash_ty(), Err(NonStandardSighashType(nonstd)));
-        assert_eq!(back.schnorr_hash_ty(), Err(sighash::Error::InvalidSighashType(nonstd)));
+        assert_eq!(back.taproot_hash_ty(), Err(sighash::Error::InvalidSighashType(nonstd)));
     }
 }
diff --git a/dash/src/psbt/map/mod.rs b/dash/src/psbt/map/mod.rs
new file mode 100644
index 000000000..91d455e01
--- /dev/null
+++ b/dash/src/psbt/map/mod.rs
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: CC0-1.0
+
+use crate::prelude::*;
+use crate::psbt::raw;
+
+mod global;
+mod input;
+mod output;
+
+pub use self::input::{Input, PsbtSighashType};
+pub use self::output::Output;
+use super::serialize::Serialize;
+
+/// A trait that describes a PSBT key-value map.
+pub(super) trait Map {
+    /// Attempt to get all key-value pairs.
+    fn get_pairs(&self) -> Vec<raw::Pair>;
+
+    /// Serialize Psbt binary map data according to BIP-174 specification.
+    ///
+    /// <map> := <keypair>* 0x00
+    ///
+    /// Why is the separator here 0x00 instead of 0xff? The separator here is used to distinguish between each chunk of data.
+    /// A separator of 0x00 would mean that the unserializer can read it as a key length of 0, which would never occur with
+    /// actual keys. It can thus be used as a separator and allow for easier unserializer implementation.
+    fn serialize_map(&self) -> Vec<u8> {
+        let mut buf = Vec::new();
+        for pair in Map::get_pairs(self) {
+            buf.extend(&pair.serialize());
+        }
+        buf.push(0x00_u8);
+        buf
+    }
+}
diff --git a/dash/src/psbt/map/output.rs b/dash/src/psbt/map/output.rs
new file mode 100644
index 000000000..4f0320198
--- /dev/null
+++ b/dash/src/psbt/map/output.rs
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: CC0-1.0
+
+use core::convert::TryFrom;
+
+use secp256k1::XOnlyPublicKey;
+use {core, secp256k1};
+
+use crate::bip32::KeySource;
+use crate::blockdata::script::ScriptBuf;
+use crate::prelude::*;
+use crate::psbt::map::Map;
+use crate::psbt::{raw, Error};
+use crate::taproot::{TapLeafHash, TapTree};
+
+/// Type: Redeem ScriptBuf PSBT_OUT_REDEEM_SCRIPT = 0x00
+const PSBT_OUT_REDEEM_SCRIPT: u8 = 0x00;
+/// Type: Witness ScriptBuf PSBT_OUT_WITNESS_SCRIPT = 0x01
+const PSBT_OUT_WITNESS_SCRIPT: u8 = 0x01;
+/// Type: BIP 32 Derivation Path PSBT_OUT_BIP32_DERIVATION = 0x02
+const PSBT_OUT_BIP32_DERIVATION: u8 = 0x02;
+/// Type: Taproot Internal Key PSBT_OUT_TAP_INTERNAL_KEY = 0x05
+const PSBT_OUT_TAP_INTERNAL_KEY: u8 = 0x05;
+/// Type: Taproot Tree PSBT_OUT_TAP_TREE = 0x06
+const PSBT_OUT_TAP_TREE: u8 = 0x06;
+/// Type: Taproot Key BIP 32 Derivation Path PSBT_OUT_TAP_BIP32_DERIVATION = 0x07
+const PSBT_OUT_TAP_BIP32_DERIVATION: u8 = 0x07;
+/// Type: Proprietary Use Type PSBT_IN_PROPRIETARY = 0xFC
+const PSBT_OUT_PROPRIETARY: u8 = 0xFC;
+
+/// A key-value map for an output of the corresponding index in the unsigned
+/// transaction.
+#[derive(Clone, Default, Debug, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Output {
+    /// The redeem script for this output.
+    pub redeem_script: Option<ScriptBuf>,
+    /// The witness script for this output.
+    pub witness_script: Option<ScriptBuf>,
+    /// A map from public keys needed to spend this output to their
+    /// corresponding master key fingerprints and derivation paths.
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq"))]
+    pub bip32_derivation: BTreeMap<secp256k1::PublicKey, KeySource>,
+    /// The internal pubkey.
+    pub tap_internal_key: Option<XOnlyPublicKey>,
+    /// Taproot Output tree.
+    pub tap_tree: Option<TapTree>,
+    /// Map of tap root x only keys to origin info and leaf hashes contained in it.
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq"))]
+    pub tap_key_origins: BTreeMap<XOnlyPublicKey, (Vec<TapLeafHash>, KeySource)>,
+    /// Proprietary key-value pairs for this output.
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq_byte_values"))]
+    pub proprietary: BTreeMap<raw::ProprietaryKey, Vec<u8>>,
+    /// Unknown key-value pairs for this output.
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq_byte_values"))]
+    pub unknown: BTreeMap<raw::Key, Vec<u8>>,
+}
+
+impl Output {
+    pub(super) fn insert_pair(&mut self, pair: raw::Pair) -> Result<(), Error> {
+        let raw::Pair { key: raw_key, value: raw_value } = pair;
+
+        match raw_key.type_value {
+            PSBT_OUT_REDEEM_SCRIPT => {
+                impl_psbt_insert_pair! {
+                    self.redeem_script <= <raw_key: _>|<raw_value: ScriptBuf>
+                }
+            }
+            PSBT_OUT_WITNESS_SCRIPT => {
+                impl_psbt_insert_pair! {
+                    self.witness_script <= <raw_key: _>|<raw_value: ScriptBuf>
+                }
+            }
+            PSBT_OUT_BIP32_DERIVATION => {
+                impl_psbt_insert_pair! {
+                    self.bip32_derivation <= <raw_key: secp256k1::PublicKey>|<raw_value: KeySource>
+                }
+            }
+            PSBT_OUT_PROPRIETARY => {
+                let key = raw::ProprietaryKey::try_from(raw_key.clone())?;
+                match self.proprietary.entry(key) {
+                    btree_map::Entry::Vacant(empty_key) => {
+                        empty_key.insert(raw_value);
+                    }
+                    btree_map::Entry::Occupied(_) => return Err(Error::DuplicateKey(raw_key)),
+                }
+            }
+            PSBT_OUT_TAP_INTERNAL_KEY => {
+                impl_psbt_insert_pair! {
+                    self.tap_internal_key <= <raw_key: _>|<raw_value: XOnlyPublicKey>
+                }
+            }
+            PSBT_OUT_TAP_TREE => {
+                impl_psbt_insert_pair! {
+                    self.tap_tree <= <raw_key: _>|<raw_value: TapTree>
+                }
+            }
+            PSBT_OUT_TAP_BIP32_DERIVATION => {
+                impl_psbt_insert_pair! {
+                    self.tap_key_origins <= <raw_key: XOnlyPublicKey>|< raw_value: (Vec<TapLeafHash>, KeySource)>
+                }
+            }
+            _ => match self.unknown.entry(raw_key) {
+                btree_map::Entry::Vacant(empty_key) => {
+                    empty_key.insert(raw_value);
+                }
+                btree_map::Entry::Occupied(k) => return Err(Error::DuplicateKey(k.key().clone())),
+            },
+        }
+
+        Ok(())
+    }
+
+    /// Combines this [`Output`] with `other` `Output` (as described by BIP 174).
+    pub fn combine(&mut self, other: Self) {
+        self.bip32_derivation.extend(other.bip32_derivation);
+        self.proprietary.extend(other.proprietary);
+        self.unknown.extend(other.unknown);
+        self.tap_key_origins.extend(other.tap_key_origins);
+
+        combine!(redeem_script, self, other);
+        combine!(witness_script, self, other);
+        combine!(tap_internal_key, self, other);
+        combine!(tap_tree, self, other);
+    }
+}
+
+impl Map for Output {
+    fn get_pairs(&self) -> Vec<raw::Pair> {
+        let mut rv: Vec<raw::Pair> = Default::default();
+
+        impl_psbt_get_pair! {
+            rv.push(self.redeem_script, PSBT_OUT_REDEEM_SCRIPT)
+        }
+
+        impl_psbt_get_pair! {
+            rv.push(self.witness_script, PSBT_OUT_WITNESS_SCRIPT)
+        }
+
+        impl_psbt_get_pair! {
+            rv.push_map(self.bip32_derivation, PSBT_OUT_BIP32_DERIVATION)
+        }
+
+        impl_psbt_get_pair! {
+            rv.push(self.tap_internal_key, PSBT_OUT_TAP_INTERNAL_KEY)
+        }
+
+        impl_psbt_get_pair! {
+            rv.push(self.tap_tree, PSBT_OUT_TAP_TREE)
+        }
+
+        impl_psbt_get_pair! {
+            rv.push_map(self.tap_key_origins, PSBT_OUT_TAP_BIP32_DERIVATION)
+        }
+
+        for (key, value) in self.proprietary.iter() {
+            rv.push(raw::Pair { key: key.to_key(), value: value.clone() });
+        }
+
+        for (key, value) in self.unknown.iter() {
+            rv.push(raw::Pair { key: key.clone(), value: value.clone() });
+        }
+
+        rv
+    }
+}
+
+impl_psbtmap_ser_de_serialize!(Output);
diff --git a/src/util/psbt/mod.rs b/dash/src/psbt/mod.rs
similarity index 51%
rename from src/util/psbt/mod.rs
rename to dash/src/psbt/mod.rs
index 2e4839d4f..374442b12 100644
--- a/src/util/psbt/mod.rs
+++ b/dash/src/psbt/mod.rs
@@ -1,16 +1,4 @@
-// Rust Bitcoin Library
-// Written by
-//   The Rust Bitcoin developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
+// SPDX-License-Identifier: CC0-1.0
 
 //! Partially Signed Bitcoin Transactions.
 //!
@@ -19,66 +7,90 @@
 //! except we define PSBTs containing non-standard sighash types as invalid.
 //!
 
-use core::cmp;
+use core::{cmp, fmt};
+#[cfg(feature = "std")]
+use std::collections::{HashMap, HashSet};
 
-use blockdata::script::Script;
-use blockdata::transaction::Transaction;
-use consensus::{encode, Encodable, Decodable};
-use consensus::encode::MAX_VEC_SIZE;
+use internals::write_err;
+use secp256k1::{Message, Secp256k1, Signing};
 
-use prelude::*;
-
-use io;
-
-mod error;
-pub use self::error::Error;
-
-pub mod raw;
+use crate::bip32::{self, ExtendedPrivKey, ExtendedPubKey, KeySource};
+use crate::blockdata::script::ScriptBuf;
+use crate::blockdata::transaction::{Transaction, txout::TxOut};
+use crate::crypto::ecdsa;
+use crate::crypto::key::{PrivateKey, PublicKey};
+use crate::prelude::*;
+pub use crate::sighash::Prevouts;
+use crate::sighash::{self, EcdsaSighashType, SighashCache};
+use crate::Amount;
 
 #[macro_use]
 mod macros;
-
+pub mod raw;
 pub mod serialize;
 
-mod map;
-pub use self::map::{Input, Output, TapTree, PsbtSighashType, IncompleteTapTree};
-use self::map::Map;
+mod error;
+pub use self::error::Error;
 
-use util::bip32::{ExtendedPubKey, KeySource};
+mod map;
+pub use self::map::{Input, Output, PsbtSighashType};
 
 /// Partially signed transaction, commonly referred to as a PSBT.
 pub type Psbt = PartiallySignedTransaction;
 
 /// A Partially Signed Transaction.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct PartiallySignedTransaction {
-    /// The unsigned transaction, scriptSigs and witnesses for each input must be
-    /// empty.
+    /// The unsigned transaction, scriptSigs and witnesses for each input must be empty.
     pub unsigned_tx: Transaction,
     /// The version number of this PSBT. If omitted, the version number is 0.
     pub version: u32,
     /// A global map from extended public keys to the used key fingerprint and
-    /// derivation path as defined by BIP 32
+    /// derivation path as defined by BIP 32.
     pub xpub: BTreeMap<ExtendedPubKey, KeySource>,
     /// Global proprietary key-value pairs.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq_byte_values"))]
     pub proprietary: BTreeMap<raw::ProprietaryKey, Vec<u8>>,
     /// Unknown global key-value pairs.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq_byte_values"))]
     pub unknown: BTreeMap<raw::Key, Vec<u8>>,
 
-    /// The corresponding key-value map for each input in the unsigned
-    /// transaction.
+    /// The corresponding key-value map for each input in the unsigned transaction.
     pub inputs: Vec<Input>,
-    /// The corresponding key-value map for each output in the unsigned
-    /// transaction.
+    /// The corresponding key-value map for each output in the unsigned transaction.
     pub outputs: Vec<Output>,
 }
 
 impl PartiallySignedTransaction {
-    /// Checks that unsigned transaction does not have scriptSig's or witness
-    /// data
+    /// Returns an iterator for the funding UTXOs of the psbt
+    ///
+    /// For each PSBT input that contains UTXO information `Ok` is returned containing that information.
+    /// The order of returned items is same as the order of inputs.
+    ///
+    /// ## Errors
+    ///
+    /// The function returns error when UTXO information is not present or is invalid.
+    ///
+    /// ## Panics
+    ///
+    /// The function panics if the length of transaction inputs is not equal to the length of PSBT inputs.
+    pub fn iter_funding_utxos(&self) -> impl Iterator<Item=Result<&TxOut, Error>> {
+        assert_eq!(self.inputs.len(), self.unsigned_tx.input.len());
+        self.unsigned_tx.input.iter().zip(&self.inputs).map(|(tx_input, psbt_input)| {
+            match (&psbt_input.witness_utxo, &psbt_input.non_witness_utxo) {
+                (Some(witness_utxo), _) => Ok(witness_utxo),
+                (None, Some(non_witness_utxo)) => {
+                    let vout = tx_input.previous_output.vout as usize;
+                    non_witness_utxo.output.get(vout).ok_or(Error::PsbtUtxoOutOfbounds)
+                }
+                (None, None) => Err(Error::MissingUtxo),
+            }
+        })
+    }
+
+    /// Checks that unsigned transaction does not have scriptSig's or witness data.
     fn unsigned_tx_checks(&self) -> Result<(), Error> {
         for txin in &self.unsigned_tx.input {
             if !txin.script_sig.is_empty() {
@@ -93,8 +105,11 @@ impl PartiallySignedTransaction {
         Ok(())
     }
 
-    /// Create a PartiallySignedTransaction from an unsigned transaction, error
-    /// if not unsigned
+    /// Creates a PSBT from an unsigned transaction.
+    ///
+    /// # Errors
+    ///
+    /// If transactions is not unsigned.
     pub fn from_unsigned_tx(tx: Transaction) -> Result<Self, Error> {
         let psbt = PartiallySignedTransaction {
             inputs: vec![Default::default(); tx.input.len()],
@@ -110,13 +125,12 @@ impl PartiallySignedTransaction {
         Ok(psbt)
     }
 
-    /// Extract the Transaction from a PartiallySignedTransaction by filling in
-    /// the available signature information in place.
+    /// Extracts the `Transaction` from a PSBT by filling in the available signature information.
     pub fn extract_tx(self) -> Transaction {
         let mut tx: Transaction = self.unsigned_tx;
 
         for (vin, psbtin) in tx.input.iter_mut().zip(self.inputs.into_iter()) {
-            vin.script_sig = psbtin.final_script_sig.unwrap_or_else(Script::new);
+            vin.script_sig = psbtin.final_script_sig.unwrap_or_default();
             vin.witness = psbtin.final_script_witness.unwrap_or_default();
         }
 
@@ -145,7 +159,7 @@ impl PartiallySignedTransaction {
             match self.xpub.entry(xpub) {
                 btree_map::Entry::Vacant(entry) => {
                     entry.insert((fingerprint1, derivation1));
-                },
+                }
                 btree_map::Entry::Occupied(mut entry) => {
                     // Here in case of the conflict we select the version with algorithm:
                     // 1) if everything is equal we do nothing
@@ -158,17 +172,19 @@ impl PartiallySignedTransaction {
 
                     let (fingerprint2, derivation2) = entry.get().clone();
 
-                    if (derivation1 == derivation2 && fingerprint1 == fingerprint2) ||
-                        (derivation1.len() < derivation2.len() && derivation1[..] == derivation2[derivation2.len() - derivation1.len()..])
+                    if (derivation1 == derivation2 && fingerprint1 == fingerprint2)
+                        || (derivation1.len() < derivation2.len()
+                        && derivation1[..]
+                        == derivation2[derivation2.len() - derivation1.len()..])
                     {
-                        continue
-                    }
-                    else if derivation2[..] == derivation1[derivation1.len() - derivation2.len()..]
+                        continue;
+                    } else if derivation2[..]
+                        == derivation1[derivation1.len() - derivation2.len()..]
                     {
                         entry.insert((fingerprint1, derivation1));
-                        continue
+                        continue;
                     }
-                    return Err(Error::CombineInconsistentKeySources(xpub));
+                    return Err(Error::CombineInconsistentKeySources(Box::new(xpub)));
                 }
             }
         }
@@ -186,149 +202,633 @@ impl PartiallySignedTransaction {
 
         Ok(())
     }
-}
 
-#[cfg(feature = "base64")]
-mod display_from_str {
-    use super::PartiallySignedTransaction;
-    use core::fmt::{Display, Formatter, self};
-    use core::str::FromStr;
-    use consensus::encode::{Error, self};
-    use ::base64::display::Base64Display;
+    /// Attempts to create _all_ the required signatures for this PSBT using `k`.
+    ///
+    /// **NOTE**: Taproot inputs are, as yet, not supported by this function. We currently only
+    /// attempt to sign ECDSA inputs.
+    ///
+    /// If you just want to sign an input with one specific key consider using `sighash_ecdsa`. This
+    /// function does not support scripts that contain `OP_CODESEPARATOR`.
+    ///
+    /// # Returns
+    ///
+    /// Either Ok(SigningKeys) or Err((SigningKeys, SigningErrors)), where
+    /// - SigningKeys: A map of input index -> pubkey associated with secret key used to sign.
+    /// - SigningKeys: A map of input index -> the error encountered while attempting to sign.
+    ///
+    /// If an error is returned some signatures may already have been added to the PSBT. Since
+    /// `partial_sigs` is a [`BTreeMap`] it is safe to retry, previous sigs will be overwritten.
+    pub fn sign<C, K>(
+        &mut self,
+        k: &K,
+        secp: &Secp256k1<C>,
+    ) -> Result<SigningKeys, (SigningKeys, SigningErrors)>
+        where
+            C: Signing,
+            K: GetKey,
+    {
+        let tx = self.unsigned_tx.clone(); // clone because we need to mutably borrow when signing.
+        let mut cache = SighashCache::new(&tx);
+
+        let mut used = BTreeMap::new();
+        let mut errors = BTreeMap::new();
+
+        for i in 0..self.inputs.len() {
+            if let Ok(SigningAlgorithm::Ecdsa) = self.signing_algorithm(i) {
+                match self.bip32_sign_ecdsa(k, i, &mut cache, secp) {
+                    Ok(v) => {
+                        used.insert(i, v);
+                    }
+                    Err(e) => {
+                        errors.insert(i, e);
+                    }
+                }
+            };
+        }
+        if errors.is_empty() {
+            Ok(used)
+        } else {
+            Err((used, errors))
+        }
+    }
 
-    /// Error happening during PSBT decoding from Base64 string
-    #[derive(Debug)]
-    #[cfg_attr(docsrs, doc(cfg(feature = "base64")))]
-    pub enum PsbtParseError {
-        /// Error in internal PSBT data structure
-        PsbtEncoding(Error),
-        /// Error in PSBT Base64 encoding
-        Base64Encoding(::base64::DecodeError)
+    /// Attempts to create all signatures required by this PSBT's `bip32_derivation` field, adding
+    /// them to `partial_sigs`.
+    ///
+    /// # Returns
+    ///
+    /// - Ok: A list of the public keys used in signing.
+    /// - Err: Error encountered trying to calculate the sighash AND we had the signing key.
+    fn bip32_sign_ecdsa<C, K, T>(
+        &mut self,
+        k: &K,
+        input_index: usize,
+        cache: &mut SighashCache<T>,
+        secp: &Secp256k1<C>,
+    ) -> Result<Vec<PublicKey>, SignError>
+        where
+            C: Signing,
+            T: Borrow<Transaction>,
+            K: GetKey,
+    {
+        let msg_sighash_ty_res = self.sighash_ecdsa(input_index, cache);
+
+        let input = &mut self.inputs[input_index]; // Index checked in call to `sighash_ecdsa`.
+
+        let mut used = vec![]; // List of pubkeys used to sign the input.
+
+        for (pk, key_source) in input.bip32_derivation.iter() {
+            let sk = if let Ok(Some(sk)) = k.get_key(KeyRequest::Bip32(key_source.clone()), secp) {
+                sk
+            } else if let Ok(Some(sk)) = k.get_key(KeyRequest::Pubkey(PublicKey::new(*pk)), secp) {
+                sk
+            } else {
+                continue;
+            };
+
+            // Only return the error if we have a secret key to sign this input.
+            let (msg, sighash_ty) = match msg_sighash_ty_res {
+                Err(e) => return Err(e),
+                Ok((msg, sighash_ty)) => (msg, sighash_ty),
+            };
+
+            let sig = ecdsa::Signature { sig: secp.sign_ecdsa(&msg, &sk.inner), hash_ty: sighash_ty };
+
+            let pk = sk.public_key(secp);
+
+            input.partial_sigs.insert(pk, sig);
+            used.push(pk);
+        }
+
+        Ok(used)
     }
 
-    impl Display for PsbtParseError {
-        fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
-            match self {
-                PsbtParseError::PsbtEncoding(err) => Display::fmt(err, f),
-                PsbtParseError::Base64Encoding(err) => Display::fmt(err, f),
+    /// Returns the sighash message to sign an ECDSA input along with the sighash type.
+    ///
+    /// Uses the [`EcdsaSighashType`] from this input if one is specified. If no sighash type is
+    /// specified uses [`EcdsaSighashType::All`]. This function does not support scripts that
+    /// contain `OP_CODESEPARATOR`.
+    pub fn sighash_ecdsa<T: Borrow<Transaction>>(
+        &self,
+        input_index: usize,
+        cache: &mut SighashCache<T>,
+    ) -> Result<(Message, EcdsaSighashType), SignError> {
+        use OutputType::*;
+
+        if self.signing_algorithm(input_index)? != SigningAlgorithm::Ecdsa {
+            return Err(SignError::WrongSigningAlgorithm);
+        }
+
+        let input = self.checked_input(input_index)?;
+        let utxo = self.spend_utxo(input_index)?;
+        let spk = &utxo.script_pubkey; // scriptPubkey for input spend utxo.
+
+        let hash_ty = input.ecdsa_hash_ty().map_err(|_| SignError::InvalidSighashType)?; // Only support standard sighash types.
+
+        match self.output_type(input_index)? {
+            Bare => {
+                let sighash = cache.legacy_signature_hash(input_index, spk, hash_ty.to_u32())?;
+                Ok((Message::from(sighash), hash_ty))
+            }
+            Sh => {
+                let script_code =
+                    input.redeem_script.as_ref().ok_or(SignError::MissingRedeemScript)?;
+                let sighash =
+                    cache.legacy_signature_hash(input_index, script_code, hash_ty.to_u32())?;
+                Ok((Message::from(sighash), hash_ty))
+            }
+            Wpkh => {
+                let script_code = ScriptBuf::p2wpkh_script_code(spk).ok_or(SignError::NotWpkh)?;
+                let sighash =
+                    cache.segwit_signature_hash(input_index, &script_code, utxo.value, hash_ty)?;
+                Ok((Message::from(sighash), hash_ty))
+            }
+            ShWpkh => {
+                let script_code = ScriptBuf::p2wpkh_script_code(
+                    input.redeem_script.as_ref().expect("checked above"),
+                )
+                    .ok_or(SignError::NotWpkh)?;
+                let sighash =
+                    cache.segwit_signature_hash(input_index, &script_code, utxo.value, hash_ty)?;
+                Ok((Message::from(sighash), hash_ty))
+            }
+            Wsh | ShWsh => {
+                let script_code =
+                    input.witness_script.as_ref().ok_or(SignError::MissingWitnessScript)?;
+                let sighash =
+                    cache.segwit_signature_hash(input_index, script_code, utxo.value, hash_ty)?;
+                Ok((Message::from(sighash), hash_ty))
+            }
+            Tr => {
+                // This PSBT signing API is WIP, taproot to come shortly.
+                Err(SignError::Unsupported)
             }
         }
     }
 
-    #[cfg(feature = "std")]
-    #[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-    impl ::std::error::Error for PsbtParseError {}
+    /// Returns the spending utxo for this PSBT's input at `input_index`.
+    pub fn spend_utxo(&self, input_index: usize) -> Result<&TxOut, SignError> {
+        let input = self.checked_input(input_index)?;
+        let utxo = if let Some(witness_utxo) = &input.witness_utxo {
+            witness_utxo
+        } else if let Some(non_witness_utxo) = &input.non_witness_utxo {
+            let vout = self.unsigned_tx.input[input_index].previous_output.vout;
+            &non_witness_utxo.output[vout as usize]
+        } else {
+            return Err(SignError::MissingSpendUtxo);
+        };
+        Ok(utxo)
+    }
 
-    #[cfg_attr(docsrs, doc(cfg(feature = "base64")))]
-    impl Display for PartiallySignedTransaction {
-        fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
-            write!(f, "{}", Base64Display::with_config(&encode::serialize(self), ::base64::STANDARD))
+    /// Gets the input at `input_index` after checking that it is a valid index.
+    fn checked_input(&self, input_index: usize) -> Result<&Input, SignError> {
+        self.check_index_is_within_bounds(input_index)?;
+        Ok(&self.inputs[input_index])
+    }
+
+    /// Checks `input_index` is within bounds for the PSBT `inputs` array and
+    /// for the PSBT `unsigned_tx` `input` array.
+    fn check_index_is_within_bounds(&self, input_index: usize) -> Result<(), SignError> {
+        if input_index >= self.inputs.len() {
+            return Err(SignError::IndexOutOfBounds(input_index, self.inputs.len()));
         }
+
+        if input_index >= self.unsigned_tx.input.len() {
+            return Err(SignError::IndexOutOfBounds(input_index, self.unsigned_tx.input.len()));
+        }
+
+        Ok(())
     }
 
-    #[cfg_attr(docsrs, doc(cfg(feature = "base64")))]
-    impl FromStr for PartiallySignedTransaction {
-        type Err = PsbtParseError;
+    /// Returns the algorithm used to sign this PSBT's input at `input_index`.
+    fn signing_algorithm(&self, input_index: usize) -> Result<SigningAlgorithm, SignError> {
+        let output_type = self.output_type(input_index)?;
+        Ok(output_type.signing_algorithm())
+    }
 
-        fn from_str(s: &str) -> Result<Self, Self::Err> {
-            let data = ::base64::decode(s).map_err(PsbtParseError::Base64Encoding)?;
-            Ok(encode::deserialize(&data).map_err(PsbtParseError::PsbtEncoding)?)
+    /// Returns the [`OutputType`] of the spend utxo for this PBST's input at `input_index`.
+    fn output_type(&self, input_index: usize) -> Result<OutputType, SignError> {
+        let input = self.checked_input(input_index)?;
+        let utxo = self.spend_utxo(input_index)?;
+        let spk = utxo.script_pubkey.clone();
+
+        // Anything that is not segwit and is not p2sh is `Bare`.
+        if !(spk.is_witness_program() || spk.is_p2sh()) {
+            return Ok(OutputType::Bare);
+        }
+
+        if spk.is_v0_p2wpkh() {
+            return Ok(OutputType::Wpkh);
+        }
+
+        if spk.is_v0_p2wsh() {
+            return Ok(OutputType::Wsh);
+        }
+
+        if spk.is_p2sh() {
+            if input.redeem_script.as_ref().map(|s| s.is_v0_p2wpkh()).unwrap_or(false) {
+                return Ok(OutputType::ShWpkh);
+            }
+            if input.redeem_script.as_ref().map(|x| x.is_v0_p2wsh()).unwrap_or(false) {
+                return Ok(OutputType::ShWsh);
+            }
+            return Ok(OutputType::Sh);
         }
+
+        if spk.is_v1_p2tr() {
+            return Ok(OutputType::Tr);
+        }
+
+        // Something is wrong with the input scriptPubkey or we do not know how to sign
+        // because there has been a new softfork that we do not yet support.
+        Err(SignError::UnknownOutputType)
+    }
+
+    /// Calculates transaction fee.
+    ///
+    /// 'Fee' being the amount that will be paid for mining a transaction with the current inputs
+    /// and outputs i.e., the difference in value of the total inputs and the total outputs.
+    ///
+    /// ## Errors
+    ///
+    /// - [`Error::MissingUtxo`] when UTXO information for any input is not present or is invalid.
+    /// - [`Error::NegativeFee`] if calculated value is negative.
+    /// - [`Error::FeeOverflow`] if an integer overflow occurs.
+    pub fn fee(&self) -> Result<Amount, Error> {
+        let mut inputs: u64 = 0;
+        for utxo in self.iter_funding_utxos() {
+            inputs = inputs.checked_add(utxo?.value).ok_or(Error::FeeOverflow)?;
+        }
+        let mut outputs: u64 = 0;
+        for out in &self.unsigned_tx.output {
+            outputs = outputs.checked_add(out.value).ok_or(Error::FeeOverflow)?;
+        }
+        inputs.checked_sub(outputs).map(Amount::from_sat).ok_or(Error::NegativeFee)
     }
 }
-#[cfg(feature = "base64")]
-#[cfg_attr(docsrs, doc(cfg(feature = "base64")))]
-pub use self::display_from_str::PsbtParseError;
 
-impl Encodable for PartiallySignedTransaction {
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let mut len = 0;
-        len += b"psbt".consensus_encode(&mut s)?;
+/// Data required to call [`GetKey`] to get the private key to sign an input.
+#[derive(Clone, Debug, PartialEq, Eq)]
+#[non_exhaustive]
+pub enum KeyRequest {
+    /// Request a private key using the associated public key.
+    Pubkey(PublicKey),
+    /// Request a private key using BIP-32 fingerprint and derivation path.
+    Bip32(KeySource),
+}
 
-        len += 0xff_u8.consensus_encode(&mut s)?;
+/// Trait to get a private key from a key request, key is then used to sign an input.
+pub trait GetKey {
+    /// An error occurred while getting the key.
+    type Error: core::fmt::Debug;
 
-        len += self.consensus_encode_map(&mut s)?;
+    /// Attempts to get the private key for `key_request`.
+    ///
+    /// # Returns
+    /// - `Some(key)` if the key is found.
+    /// - `None` if the key was not found but no error was encountered.
+    /// - `Err` if an error was encountered while looking for the key.
+    fn get_key<C: Signing>(
+        &self,
+        key_request: KeyRequest,
+        secp: &Secp256k1<C>,
+    ) -> Result<Option<PrivateKey>, Self::Error>;
+}
 
-        for i in &self.inputs {
-            len += i.consensus_encode(&mut s)?;
+impl GetKey for ExtendedPrivKey {
+    type Error = GetKeyError;
+
+    fn get_key<C: Signing>(
+        &self,
+        key_request: KeyRequest,
+        secp: &Secp256k1<C>,
+    ) -> Result<Option<PrivateKey>, Self::Error> {
+        match key_request {
+            KeyRequest::Pubkey(_) => Err(GetKeyError::NotSupported),
+            KeyRequest::Bip32((fingerprint, path)) => {
+                let key = if self.fingerprint(secp) == fingerprint {
+                    let k = self.derive_priv(secp, &path)?;
+                    Some(k.to_priv())
+                } else {
+                    None
+                };
+                Ok(key)
+            }
         }
+    }
+}
 
-        for i in &self.outputs {
-            len += i.consensus_encode(&mut s)?;
+/// Map of input index -> pubkey associated with secret key used to create signature for that input.
+pub type SigningKeys = BTreeMap<usize, Vec<PublicKey>>;
+
+/// Map of input index -> the error encountered while attempting to sign that input.
+pub type SigningErrors = BTreeMap<usize, SignError>;
+
+#[rustfmt::skip]
+macro_rules! impl_get_key_for_set {
+    ($set:ident) => {
+
+impl GetKey for $set<ExtendedPrivKey> {
+    type Error = GetKeyError;
+
+    fn get_key<C: Signing>(
+        &self,
+        key_request: KeyRequest,
+        secp: &Secp256k1<C>
+    ) -> Result<Option<PrivateKey>, Self::Error> {
+        match key_request {
+            KeyRequest::Pubkey(_) => Err(GetKeyError::NotSupported),
+            KeyRequest::Bip32((fingerprint, path)) => {
+                for xpriv in self.iter() {
+                    if xpriv.parent_fingerprint == fingerprint {
+                        let k = xpriv.derive_priv(secp, &path)?;
+                        return Ok(Some(k.to_priv()));
+                    }
+                }
+                Ok(None)
+            }
+        }
+    }
+}}}
+impl_get_key_for_set!(BTreeSet);
+#[cfg(feature = "std")]
+impl_get_key_for_set!(HashSet);
+
+#[rustfmt::skip]
+macro_rules! impl_get_key_for_map {
+    ($map:ident) => {
+
+impl GetKey for $map<PublicKey, PrivateKey> {
+    type Error = GetKeyError;
+
+    fn get_key<C: Signing>(
+        &self,
+        key_request: KeyRequest,
+        _: &Secp256k1<C>,
+    ) -> Result<Option<PrivateKey>, Self::Error> {
+        match key_request {
+            KeyRequest::Pubkey(pk) => Ok(self.get(&pk).cloned()),
+            KeyRequest::Bip32(_) => Err(GetKeyError::NotSupported),
         }
+    }
+}}}
+impl_get_key_for_map!(BTreeMap);
+#[cfg(feature = "std")]
+impl_get_key_for_map!(HashMap);
+
+/// Errors when getting a key.
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+#[non_exhaustive]
+pub enum GetKeyError {
+    /// A bip32 error.
+    Bip32(bip32::Error),
+    /// The GetKey operation is not supported for this key request.
+    NotSupported,
+}
+
+impl fmt::Display for GetKeyError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use GetKeyError::*;
 
-        Ok(len)
+        match *self {
+            Bip32(ref e) => write_err!(f, "a bip23 error"; e),
+            NotSupported =>
+                f.write_str("the GetKey operation is not supported for this key request"),
+        }
     }
 }
 
-impl Decodable for PartiallySignedTransaction {
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Self, encode::Error> {
-        let mut d = d.take(MAX_VEC_SIZE as u64);
-        let magic: [u8; 4] = Decodable::consensus_decode(&mut d)?;
+#[cfg(feature = "std")]
+impl std::error::Error for GetKeyError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use GetKeyError::*;
 
-        if *b"psbt" != magic {
-            return Err(Error::InvalidMagic.into());
+        match *self {
+            NotSupported => None,
+            Bip32(ref e) => Some(e),
         }
+    }
+}
 
-        if 0xff_u8 != u8::consensus_decode(&mut d)? {
-            return Err(Error::InvalidSeparator.into());
+impl From<bip32::Error> for GetKeyError {
+    fn from(e: bip32::Error) -> Self { GetKeyError::Bip32(e) }
+}
+
+/// The various output types supported by the Bitcoin network.
+#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[non_exhaustive]
+pub enum OutputType {
+    /// An output of type: pay-to-pubkey or pay-to-pubkey-hash.
+    Bare,
+    /// A pay-to-witness-pubkey-hash output (P2WPKH).
+    Wpkh,
+    /// A pay-to-witness-script-hash output (P2WSH).
+    Wsh,
+    /// A nested segwit output, pay-to-witness-pubkey-hash nested in a pay-to-script-hash.
+    ShWpkh,
+    /// A nested segwit output, pay-to-witness-script-hash nested in a pay-to-script-hash.
+    ShWsh,
+    /// A pay-to-script-hash output excluding wrapped segwit (P2SH).
+    Sh,
+    /// A taproot output (P2TR).
+    Tr,
+}
+
+impl OutputType {
+    /// The signing algorithm used to sign this output type.
+    pub fn signing_algorithm(&self) -> SigningAlgorithm {
+        use OutputType::*;
+
+        match self {
+            Bare | Wpkh | Wsh | ShWpkh | ShWsh | Sh => SigningAlgorithm::Ecdsa,
+            Tr => SigningAlgorithm::Schnorr,
         }
+    }
+}
 
-        let mut global = PartiallySignedTransaction::consensus_decode_global(&mut d)?;
-        global.unsigned_tx_checks()?;
+/// Signing algorithms supported by the Bitcoin network.
+#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum SigningAlgorithm {
+    /// The Elliptic Curve Digital Signature Algorithm (see [wikipedia]).
+    ///
+    /// [wikipedia]: https://en.wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm
+    Ecdsa,
+    /// The Schnorr signature algorithm (see [wikipedia]).
+    ///
+    /// [wikipedia]: https://en.wikipedia.org/wiki/Schnorr_signature
+    Schnorr,
+}
 
-        let inputs: Vec<Input> = {
-            let inputs_len: usize = (&global.unsigned_tx.input).len();
+/// Errors encountered while calculating the sighash message.
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone)]
+pub enum SignError {
+    /// Input index out of bounds (actual index, maximum index allowed).
+    IndexOutOfBounds(usize, usize),
+    /// Invalid Sighash type.
+    InvalidSighashType,
+    /// Missing input utxo.
+    MissingInputUtxo,
+    /// Missing Redeem script.
+    MissingRedeemScript,
+    /// Missing spending utxo.
+    MissingSpendUtxo,
+    /// Missing witness script.
+    MissingWitnessScript,
+    /// Signing algorithm and key type does not match.
+    MismatchedAlgoKey,
+    /// Attempted to ECDSA sign an non-ECDSA input.
+    NotEcdsa,
+    /// The `scriptPubkey` is not a P2WPKH script.
+    NotWpkh,
+    /// Sighash computation error.
+    SighashComputation(sighash::Error),
+    /// Unable to determine the output type.
+    UnknownOutputType,
+    /// Unable to find key.
+    KeyNotFound,
+    /// Attempt to sign an input with the wrong signing algorithm.
+    WrongSigningAlgorithm,
+    /// Signing request currently unsupported.
+    Unsupported,
+}
 
-            let mut inputs: Vec<Input> = Vec::with_capacity(inputs_len);
+impl fmt::Display for SignError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        use self::SignError::*;
 
-            for _ in 0..inputs_len {
-                inputs.push(Decodable::consensus_decode(&mut d)?);
+        match *self {
+            IndexOutOfBounds(ind, len) => {
+                write!(f, "index {}, psbt input len: {}", ind, len)
             }
+            InvalidSighashType => write!(f, "invalid sighash type"),
+            MissingInputUtxo => write!(f, "missing input utxo in PBST"),
+            MissingRedeemScript => write!(f, "missing redeem script"),
+            MissingSpendUtxo => write!(f, "missing spend utxo in PSBT"),
+            MissingWitnessScript => write!(f, "missing witness script"),
+            MismatchedAlgoKey => write!(f, "signing algorithm and key type does not match"),
+            NotEcdsa => write!(f, "attempted to ECDSA sign an non-ECDSA input"),
+            NotWpkh => write!(f, "the scriptPubkey is not a P2WPKH script"),
+            SighashComputation(e) => write!(f, "sighash: {}", e),
+            UnknownOutputType => write!(f, "unable to determine the output type"),
+            KeyNotFound => write!(f, "unable to find key"),
+            WrongSigningAlgorithm =>
+                write!(f, "attempt to sign an input with the wrong signing algorithm"),
+            Unsupported => write!(f, "signing request currently unsupported"),
+        }
+    }
+}
 
-            inputs
-        };
+#[cfg(feature = "std")]
+impl std::error::Error for SignError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::SignError::*;
+
+        match *self {
+            IndexOutOfBounds(_, _)
+            | InvalidSighashType
+            | MissingInputUtxo
+            | MissingRedeemScript
+            | MissingSpendUtxo
+            | MissingWitnessScript
+            | MismatchedAlgoKey
+            | NotEcdsa
+            | NotWpkh
+            | UnknownOutputType
+            | KeyNotFound
+            | WrongSigningAlgorithm
+            | Unsupported => None,
+            SighashComputation(ref e) => Some(e),
+        }
+    }
+}
+
+impl From<sighash::Error> for SignError {
+    fn from(e: sighash::Error) -> Self { SignError::SighashComputation(e) }
+}
+
+#[cfg(feature = "base64")]
+mod display_from_str {
+    use core::fmt::{self, Display, Formatter};
+    use core::str::FromStr;
+
+    use base64::display::Base64Display;
+    use internals::write_err;
 
-        let outputs: Vec<Output> = {
-            let outputs_len: usize = (&global.unsigned_tx.output).len();
+    use super::{Error, PartiallySignedTransaction};
 
-            let mut outputs: Vec<Output> = Vec::with_capacity(outputs_len);
+    /// Error encountered during PSBT decoding from Base64 string.
+    #[derive(Debug)]
+    #[non_exhaustive]
+    pub enum PsbtParseError {
+        /// Error in internal PSBT data structure.
+        PsbtEncoding(Error),
+        /// Error in PSBT Base64 encoding.
+        Base64Encoding(::base64::DecodeError),
+    }
 
-            for _ in 0..outputs_len {
-                outputs.push(Decodable::consensus_decode(&mut d)?);
+    impl Display for PsbtParseError {
+        fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+            use self::PsbtParseError::*;
+
+            match *self {
+                PsbtEncoding(ref e) => write_err!(f, "error in internal PSBT data structure"; e),
+                Base64Encoding(ref e) => write_err!(f, "error in PSBT base64 encoding"; e),
             }
+        }
+    }
 
-            outputs
-        };
+    #[cfg(feature = "std")]
+    impl std::error::Error for PsbtParseError {
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            use self::PsbtParseError::*;
 
-        global.inputs = inputs;
-        global.outputs = outputs;
-        Ok(global)
+            match self {
+                PsbtEncoding(e) => Some(e),
+                Base64Encoding(e) => Some(e),
+            }
+        }
     }
-}
 
-#[cfg(test)]
-mod tests {
-    use super::*;
+    impl Display for PartiallySignedTransaction {
+        fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+            write!(f, "{}", Base64Display::with_config(&self.serialize(), base64::STANDARD))
+        }
+    }
 
-    use hashes::hex::FromHex;
-    use hashes::{sha256, hash160, Hash, ripemd160};
-    use hash_types::Txid;
+    impl FromStr for PartiallySignedTransaction {
+        type Err = PsbtParseError;
 
-    use secp256k1::{Secp256k1, self};
+        fn from_str(s: &str) -> Result<Self, Self::Err> {
+            let data = base64::decode(s).map_err(PsbtParseError::Base64Encoding)?;
+            PartiallySignedTransaction::deserialize(&data).map_err(PsbtParseError::PsbtEncoding)
+        }
+    }
+}
 
-    use blockdata::script::Script;
-    use blockdata::transaction::{Transaction, txin::TxIn, txout::TxOut, outpoint::OutPoint};
-    use consensus::encode::{deserialize, serialize, serialize_hex};
-    use util::bip32::{ChildNumber, ExtendedPrivKey, ExtendedPubKey, Fingerprint, KeySource};
-    use util::psbt::map::{Output, Input};
-    use util::psbt::raw;
+#[cfg(feature = "base64")]
+pub use self::display_from_str::PsbtParseError;
 
+#[cfg(test)]
+mod tests {
     use std::collections::BTreeMap;
-    use blockdata::witness::Witness;
-    use Network::Dash;
 
-    #[ignore]
+    use hashes::{hash160, ripemd160, sha256, Hash};
+    use secp256k1::{self, Secp256k1};
+    #[cfg(feature = "rand-std")]
+    use secp256k1::{All, SecretKey};
+
+    use super::*;
+    use crate::bip32::{ChildNumber, ExtendedPrivKey, ExtendedPubKey, KeySource};
+    use crate::blockdata::script::ScriptBuf;
+    use crate::blockdata::transaction::{outpoint::OutPoint, Transaction, txin::TxIn, txout::TxOut};
+    use crate::blockdata::witness::Witness;
+    use crate::internal_macros::hex;
+    use crate::Network::Dash;
+    use crate::psbt::map::{Input, Output};
+    use crate::psbt::raw;
+    use crate::psbt::serialize::{Deserialize, Serialize};
+
     #[test]
     fn trivial_psbt() {
         let psbt = PartiallySignedTransaction {
@@ -337,7 +837,7 @@ mod tests {
                 lock_time: 0,
                 input: vec![],
                 output: vec![],
-                special_transaction_payload: None
+                special_transaction_payload: None,
             },
             xpub: Default::default(),
             version: 0,
@@ -347,29 +847,28 @@ mod tests {
             inputs: vec![],
             outputs: vec![],
         };
-        assert_eq!(serialize_hex(&psbt), "70736274ff01000a0200000000000000000000");
+        assert_eq!(psbt.serialize_hex(), "70736274ff01000a0200000000000000000000");
     }
 
     #[test]
-   fn psbt_uncompressed_key() {
+    fn psbt_uncompressed_key() {
+        let psbt: PartiallySignedTransaction = hex_psbt!("70736274ff01003302000000010000000000000000000000000000000000000000000000000000000000000000ffffffff00ffffffff000000000000420204bb0d5d0cca36e7b9c80f63bc04c1240babb83bcd2803ef7ac8b6e2af594291daec281e856c98d210c5ab14dfd5828761f8ee7d5f45ca21ad3e4c4b41b747a3a047304402204f67e2afb76142d44fae58a2495d33a3419daa26cd0db8d04f3452b63289ac0f022010762a9fb67e94cc5cad9026f6dc99ff7f070f4278d30fbc7d0c869dd38c7fe70100").unwrap();
 
-       let psbt: PartiallySignedTransaction = hex_psbt!("70736274ff01003302000000010000000000000000000000000000000000000000000000000000000000000000ffffffff00ffffffff000000000000420204bb0d5d0cca36e7b9c80f63bc04c1240babb83bcd2803ef7ac8b6e2af594291daec281e856c98d210c5ab14dfd5828761f8ee7d5f45ca21ad3e4c4b41b747a3a047304402204f67e2afb76142d44fae58a2495d33a3419daa26cd0db8d04f3452b63289ac0f022010762a9fb67e94cc5cad9026f6dc99ff7f070f4278d30fbc7d0c869dd38c7fe70100").unwrap();
-
-       assert!(psbt.inputs[0].partial_sigs.len() == 1);
-       let pk = psbt.inputs[0].partial_sigs.iter().next().unwrap().0;
-       assert!(!pk.compressed);
-   }
+        assert!(psbt.inputs[0].partial_sigs.len() == 1);
+        let pk = psbt.inputs[0].partial_sigs.iter().next().unwrap().0;
+        assert!(!pk.compressed);
+    }
 
     #[test]
     fn serialize_then_deserialize_output() {
         let secp = &Secp256k1::new();
-        let seed = Vec::from_hex("000102030405060708090a0b0c0d0e0f").unwrap();
+        let seed = hex!("000102030405060708090a0b0c0d0e0f");
 
         let mut hd_keypaths: BTreeMap<secp256k1::PublicKey, KeySource> = Default::default();
 
         let mut sk: ExtendedPrivKey = ExtendedPrivKey::new_master(Dash, &seed).unwrap();
 
-        let fprint: Fingerprint = sk.fingerprint(&secp);
+        let fprint = sk.fingerprint(secp);
 
         let dpath: Vec<ChildNumber> = vec![
             ChildNumber::from_normal_idx(0).unwrap(),
@@ -384,23 +883,26 @@ mod tests {
 
         sk = sk.derive_priv(secp, &dpath).unwrap();
 
-        let pk: ExtendedPubKey = ExtendedPubKey::from_priv(&secp, &sk);
+        let pk = ExtendedPubKey::from_priv(secp, &sk);
 
         hd_keypaths.insert(pk.public_key, (fprint, dpath.into()));
 
         let expected: Output = Output {
-            redeem_script: Some(hex_script!("76a914d0c59903c5bac2868760e90fd521a4665aa7652088ac")),
-            witness_script: Some(hex_script!("a9143545e6e33b832c47050f24d3eeb93c9c03948bc787")),
+            redeem_script: Some(
+                ScriptBuf::from_hex("76a914d0c59903c5bac2868760e90fd521a4665aa7652088ac").unwrap(),
+            ),
+            witness_script: Some(
+                ScriptBuf::from_hex("a9143545e6e33b832c47050f24d3eeb93c9c03948bc787").unwrap(),
+            ),
             bip32_derivation: hd_keypaths,
             ..Default::default()
         };
 
-        let actual: Output = deserialize(&serialize(&expected)).unwrap();
+        let actual = Output::deserialize(&expected.serialize()).unwrap();
 
         assert_eq!(expected, actual);
     }
 
-    #[ignore]
     #[test]
     fn serialize_then_deserialize_global() {
         let expected = PartiallySignedTransaction {
@@ -409,30 +911,32 @@ mod tests {
                 lock_time: 1257139,
                 input: vec![TxIn {
                     previous_output: OutPoint {
-                        txid: Txid::from_hex(
-                            "f61b1742ca13176464adb3cb66050c00787bb3a4eead37e985f2df1e37718126",
-                        ).unwrap(),
+                        txid: "f61b1742ca13176464adb3cb66050c00787bb3a4eead37e985f2df1e37718126"
+                            .parse()
+                            .unwrap(),
                         vout: 0,
                     },
-                    script_sig: Script::new(),
-                    sequence: 4294967294,
+                    script_sig: ScriptBuf::new(),
+                    sequence: u32::MAX,
                     witness: Witness::default(),
                 }],
                 output: vec![
                     TxOut {
                         value: 99999699,
-                        script_pubkey: hex_script!(
-                            "76a914d0c59903c5bac2868760e90fd521a4665aa7652088ac"
-                        ),
+                        script_pubkey: ScriptBuf::from_hex(
+                            "76a914d0c59903c5bac2868760e90fd521a4665aa7652088ac",
+                        )
+                            .unwrap(),
                     },
                     TxOut {
                         value: 100000000,
-                        script_pubkey: hex_script!(
-                            "a9143545e6e33b832c47050f24d3eeb93c9c03948bc787"
-                        ),
+                        script_pubkey: ScriptBuf::from_hex(
+                            "a9143545e6e33b832c47050f24d3eeb93c9c03948bc787",
+                        )
+                            .unwrap(),
                     },
                 ],
-                special_transaction_payload: None
+                special_transaction_payload: None,
             },
             xpub: Default::default(),
             version: 0,
@@ -442,32 +946,27 @@ mod tests {
             outputs: vec![Output::default(), Output::default()],
         };
 
-        let actual: PartiallySignedTransaction = deserialize(&serialize(&expected)).unwrap();
-
+        let actual: Psbt = Psbt::deserialize(&expected.serialize()).unwrap();
         assert_eq!(expected, actual);
     }
 
     #[test]
     fn serialize_then_deserialize_psbtkvpair() {
         let expected = raw::Pair {
-            key: raw::Key {
-                type_value: 0u8,
-                key: vec![42u8, 69u8],
-            },
+            key: raw::Key { type_value: 0u8, key: vec![42u8, 69u8] },
             value: vec![69u8, 42u8, 4u8],
         };
 
-        let actual: raw::Pair = deserialize(&serialize(&expected)).unwrap();
+        let actual = raw::Pair::deserialize(&expected.serialize()).unwrap();
 
         assert_eq!(expected, actual);
     }
 
-    #[ignore]
     #[test]
     fn deserialize_and_serialize_psbt_with_two_partial_sigs() {
         let hex = "70736274ff0100890200000001207ae985d787dfe6143d5c58fad79cc7105e0e799fcf033b7f2ba17e62d7b3200000000000ffffffff02563d03000000000022002019899534b9a011043c0dd57c3ff9a381c3522c5f27c6a42319085b56ca543a1d6adc020000000000220020618b47a07ebecca4e156edb1b9ea7c24bdee0139fc049237965ffdaf56d5ee73000000000001012b801a0600000000002200201148e93e9315e37dbed2121be5239257af35adc03ffdfc5d914b083afa44dab82202025fe7371376d53cf8a2783917c28bf30bd690b0a4d4a207690093ca2b920ee076473044022007e06b362e89912abd4661f47945430739b006a85d1b2a16c01dc1a4bd07acab022061576d7aa834988b7ab94ef21d8eebd996ea59ea20529a19b15f0c9cebe3d8ac01220202b3fe93530020a8294f0e527e33fbdff184f047eb6b5a1558a352f62c29972f8a473044022002787f926d6817504431ee281183b8119b6845bfaa6befae45e13b6d430c9d2f02202859f149a6cd26ae2f03a107e7f33c7d91730dade305fe077bae677b5d44952a01010547522102b3fe93530020a8294f0e527e33fbdff184f047eb6b5a1558a352f62c29972f8a21025fe7371376d53cf8a2783917c28bf30bd690b0a4d4a207690093ca2b920ee07652ae0001014752210283ef76537f2d58ae3aa3a4bd8ae41c3f230ccadffb1a0bd3ca504d871cff05e7210353d79cc0cb1396f4ce278d005f16d948e02a6aec9ed1109f13747ecb1507b37b52ae00010147522102b3937241777b6665e0d694e52f9c1b188433641df852da6fc42187b5d8a368a321034cdd474f01cc5aa7ff834ad8bcc882a87e854affc775486bc2a9f62e8f49bd7852ae00";
         let psbt: PartiallySignedTransaction = hex_psbt!(hex).unwrap();
-        assert_eq!(hex, serialize_hex(&psbt));
+        assert_eq!(hex, psbt.serialize_hex());
     }
 
     #[cfg(feature = "serde")]
@@ -475,8 +974,8 @@ mod tests {
     fn test_serde_psbt() {
         //! Create a full PSBT value with various fields filled and make sure it can be JSONized.
         use hashes::sha256d;
-        use util::psbt::map::Input;
-        use EcdsaSighashType;
+
+        use crate::psbt::map::Input;
 
         // create some values to use in the PSBT
         let tx = Transaction {
@@ -484,30 +983,38 @@ mod tests {
             lock_time: 0,
             input: vec![TxIn {
                 previous_output: OutPoint {
-                    txid: Txid::from_hex("e567952fb6cc33857f392efa3a46c995a28f69cca4bb1b37e0204dab1ec7a389").unwrap(),
+                    txid: "e567952fb6cc33857f392efa3a46c995a28f69cca4bb1b37e0204dab1ec7a389"
+                        .parse()
+                        .unwrap(),
                     vout: 1,
                 },
-                script_sig: hex_script!("160014be18d152a9b012039daf3da7de4f53349eecb985"),
-                sequence: 4294967295,
-                witness: Witness::from_vec(vec![Vec::from_hex("03d2e15674941bad4a996372cb87e1856d3652606d98562fe39c5e9e7e413f2105").unwrap()]),
+                script_sig: ScriptBuf::from_hex("160014be18d152a9b012039daf3da7de4f53349eecb985")
+                    .unwrap(),
+                sequence: u32::MAX,
+                witness: Witness::from_slice(&[hex!(
+                    "03d2e15674941bad4a996372cb87e1856d3652606d98562fe39c5e9e7e413f2105"
+                )]),
             }],
-            output: vec![
-                TxOut {
-                    value: 190303501938,
-                    script_pubkey: hex_script!("a914339725ba21efd62ac753a9bcd067d6c7a6a39d0587"),
-                },
-            ],
-            special_transaction_payload: None
+            output: vec![TxOut {
+                value: 190303501938,
+                script_pubkey: ScriptBuf::from_hex(
+                    "a914339725ba21efd62ac753a9bcd067d6c7a6a39d0587",
+                )
+                    .unwrap(),
+            }],
+            special_transaction_payload: None,
         };
-        let unknown: BTreeMap<raw::Key, Vec<u8>> = vec![(
-            raw::Key { type_value: 1, key: vec![0, 1] },
-            vec![3, 4 ,5],
-        )].into_iter().collect();
+        let unknown: BTreeMap<raw::Key, Vec<u8>> =
+            vec![(raw::Key { type_value: 1, key: vec![0, 1] }, vec![3, 4, 5])]
+                .into_iter()
+                .collect();
         let key_source = ("deadbeef".parse().unwrap(), "m/0'/1".parse().unwrap());
         let keypaths: BTreeMap<secp256k1::PublicKey, KeySource> = vec![(
             "0339880dc92394b7355e3d0439fa283c31de7590812ea011c4245c0674a685e883".parse().unwrap(),
             key_source.clone(),
-        )].into_iter().collect();
+        )]
+            .into_iter()
+            .collect();
 
         let proprietary: BTreeMap<raw::ProprietaryKey, Vec<u8>> = vec![(
             raw::ProprietaryKey {
@@ -516,7 +1023,9 @@ mod tests {
                 key: "test_key".as_bytes().to_vec(),
             },
             vec![5, 6, 7],
-        )].into_iter().collect();
+        )]
+            .into_iter()
+            .collect();
 
         let psbt = PartiallySignedTransaction {
             version: 0,
@@ -524,67 +1033,68 @@ mod tests {
                 let xpub: ExtendedPubKey =
                     "xpub661MyMwAqRbcGoRVtwfvzZsq2VBJR1LAHfQstHUoxqDorV89vRoMxUZ27kLrraAj6MPi\
                     QfrDb27gigC1VS1dBXi5jGpxmMeBXEkKkcXUTg4".parse().unwrap();
-                vec![(xpub, key_source.clone())].into_iter().collect()
+                vec![(xpub, key_source)].into_iter().collect()
             },
             unsigned_tx: {
                 let mut unsigned = tx.clone();
-                unsigned.input[0].script_sig = Script::new();
+                unsigned.input[0].script_sig = ScriptBuf::new();
                 unsigned.input[0].witness = Witness::default();
                 unsigned
             },
             proprietary: proprietary.clone(),
             unknown: unknown.clone(),
 
-            inputs: vec![Input {
-                non_witness_utxo: Some(tx),
-                witness_utxo: Some(TxOut {
-                    value: 190303501938,
-                    script_pubkey: hex_script!("a914339725ba21efd62ac753a9bcd067d6c7a6a39d0587"),
-                }),
-                sighash_type: Some("SIGHASH_SINGLE|SIGHASH_ANYONECANPAY".parse::<EcdsaSighashType>().unwrap().into()),
-                redeem_script: Some(vec![0x51].into()),
-                witness_script: None,
-                partial_sigs: vec![(
-                    "0339880dc92394b7355e3d0439fa283c31de7590812ea011c4245c0674a685e883".parse().unwrap(),
-                    "304402204f67e2afb76142d44fae58a2495d33a3419daa26cd0db8d04f3452b63289ac0f022010762a9fb67e94cc5cad9026f6dc99ff7f070f4278d30fbc7d0c869dd38c7fe701".parse().unwrap(),
-                )].into_iter().collect(),
-                bip32_derivation: keypaths.clone(),
-                final_script_witness: Some(Witness::from_vec(vec![vec![1, 3], vec![5]])),
-                ripemd160_preimages: vec![(ripemd160::Hash::hash(&[]), vec![1, 2])].into_iter().collect(),
-                sha256_preimages: vec![(sha256::Hash::hash(&[]), vec![1, 2])].into_iter().collect(),
-                hash160_preimages: vec![(hash160::Hash::hash(&[]), vec![1, 2])].into_iter().collect(),
-                hash256_preimages: vec![(sha256d::Hash::hash(&[]), vec![1, 2])].into_iter().collect(),
-                proprietary: proprietary.clone(),
-                unknown: unknown.clone(),
-                ..Default::default()
-            }],
-            outputs: vec![Output {
-                bip32_derivation: keypaths,
-                proprietary: proprietary.clone(),
-                unknown: unknown.clone(),
-                ..Default::default()
-            }],
+            inputs: vec![
+                Input {
+                    non_witness_utxo: Some(tx),
+                    witness_utxo: Some(TxOut {
+                        value: 190303501938,
+                        script_pubkey: ScriptBuf::from_hex("a914339725ba21efd62ac753a9bcd067d6c7a6a39d0587").unwrap(),
+                    }),
+                    sighash_type: Some("SIGHASH_SINGLE|SIGHASH_ANYONECANPAY".parse::<PsbtSighashType>().unwrap()),
+                    redeem_script: Some(vec![0x51].into()),
+                    witness_script: None,
+                    partial_sigs: vec![(
+                        "0339880dc92394b7355e3d0439fa283c31de7590812ea011c4245c0674a685e883".parse().unwrap(),
+                        "304402204f67e2afb76142d44fae58a2495d33a3419daa26cd0db8d04f3452b63289ac0f022010762a9fb67e94cc5cad9026f6dc99ff7f070f4278d30fbc7d0c869dd38c7fe701".parse().unwrap(),
+                    )].into_iter().collect(),
+                    bip32_derivation: keypaths.clone(),
+                    final_script_witness: Some(Witness::from_slice(&[vec![1, 3], vec![5]])),
+                    ripemd160_preimages: vec![(ripemd160::Hash::hash(&[]), vec![1, 2])].into_iter().collect(),
+                    sha256_preimages: vec![(sha256::Hash::hash(&[]), vec![1, 2])].into_iter().collect(),
+                    hash160_preimages: vec![(hash160::Hash::hash(&[]), vec![1, 2])].into_iter().collect(),
+                    hash256_preimages: vec![(sha256d::Hash::hash(&[]), vec![1, 2])].into_iter().collect(),
+                    proprietary: proprietary.clone(),
+                    unknown: unknown.clone(),
+                    ..Default::default()
+                }
+            ],
+            outputs: vec![
+                Output {
+                    bip32_derivation: keypaths,
+                    proprietary,
+                    unknown,
+                    ..Default::default()
+                }
+            ],
         };
-        let encoded = ::serde_json::to_string(&psbt).unwrap();
-        let decoded: PartiallySignedTransaction = ::serde_json::from_str(&encoded).unwrap();
+        let encoded = serde_json::to_string(&psbt).unwrap();
+        let decoded: PartiallySignedTransaction = serde_json::from_str(&encoded).unwrap();
         assert_eq!(psbt, decoded);
     }
 
     mod bip_vectors {
+        use std::collections::BTreeMap;
         #[cfg(feature = "base64")]
         use std::str::FromStr;
 
-        use hashes::hex::FromHex;
-        use hash_types::Txid;
-
-        use blockdata::script::Script;
-        use blockdata::transaction::{hash_type::EcdsaSighashType, Transaction, txin::TxIn, txout::TxOut, outpoint::OutPoint};
-        use consensus::encode::serialize_hex;
-        use util::psbt::map::{Map, Input, Output};
-        use util::psbt::raw;
-        use util::psbt::{PartiallySignedTransaction, Error};
-        use std::collections::BTreeMap;
-        use blockdata::witness::Witness;
+        use super::*;
+        use crate::blockdata::script::ScriptBuf;
+        use crate::blockdata::transaction::{outpoint::OutPoint, Transaction, txin::TxIn, txout::TxOut};
+        use crate::blockdata::witness::Witness;
+        use crate::psbt::map::{Input, Map, Output};
+        use crate::psbt::{raw, Error, PartiallySignedTransaction};
+        use crate::sighash::EcdsaSighashType;
 
         #[test]
         #[should_panic(expected = "InvalidMagic")]
@@ -612,7 +1122,7 @@ mod tests {
         #[test]
         #[should_panic(expected = "ConsensusEncoding")]
         fn invalid_vector_2_base64() {
-            use util::psbt::PsbtParseError;
+            use crate::psbt::PsbtParseError;
             PartiallySignedTransaction::from_str("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")
                 // This weird thing is necessary since rustc 0.29 prints out I/O error in a different format than later versions
                 .map_err(|err| match err {
@@ -662,87 +1172,86 @@ mod tests {
             PartiallySignedTransaction::from_str("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").unwrap();
         }
 
-        #[ignore]
         #[test]
         fn valid_vector_1() {
             let unserialized = PartiallySignedTransaction {
                 unsigned_tx: Transaction {
                     version: 2,
                     lock_time: 1257139,
-                    input: vec![TxIn {
-                        previous_output: OutPoint {
-                            txid: Txid::from_hex(
-                                "f61b1742ca13176464adb3cb66050c00787bb3a4eead37e985f2df1e37718126",
-                            ).unwrap(),
-                            vout: 0,
-                        },
-                        script_sig: Script::new(),
-                        sequence: 4294967294,
-                        witness: Witness::default(),
-                    }],
+                    input: vec![
+                        TxIn {
+                            previous_output: OutPoint {
+                                txid: "f61b1742ca13176464adb3cb66050c00787bb3a4eead37e985f2df1e37718126".parse().unwrap(),
+                                vout: 0,
+                            },
+                            script_sig: ScriptBuf::new(),
+                            sequence: u32::MAX,
+                            witness: Witness::default(),
+                        }
+                    ],
                     output: vec![
                         TxOut {
                             value: 99999699,
-                            script_pubkey: hex_script!("76a914d0c59903c5bac2868760e90fd521a4665aa7652088ac"),
+                            script_pubkey: ScriptBuf::from_hex("76a914d0c59903c5bac2868760e90fd521a4665aa7652088ac").unwrap(),
                         },
                         TxOut {
                             value: 100000000,
-                            script_pubkey: hex_script!("a9143545e6e33b832c47050f24d3eeb93c9c03948bc787"),
+                            script_pubkey: ScriptBuf::from_hex("a9143545e6e33b832c47050f24d3eeb93c9c03948bc787").unwrap(),
                         },
                     ],
-                    special_transaction_payload: None
+                    special_transaction_payload: None,
                 },
                 xpub: Default::default(),
                 version: 0,
                 proprietary: BTreeMap::new(),
                 unknown: BTreeMap::new(),
 
-                inputs: vec![Input {
-                    non_witness_utxo: Some(Transaction {
-                        version: 1,
-                        lock_time: 0,
-                        input: vec![TxIn {
-                            previous_output: OutPoint {
-                                txid: Txid::from_hex(
-                                    "e567952fb6cc33857f392efa3a46c995a28f69cca4bb1b37e0204dab1ec7a389",
-                                ).unwrap(),
-                                vout: 1,
-                            },
-                            script_sig: hex_script!("160014be18d152a9b012039daf3da7de4f53349eecb985"),
-                            sequence: 4294967295,
-                            witness: Witness::from_vec(vec![
-                                Vec::from_hex("304402202712be22e0270f394f568311dc7ca9a68970b8025fdd3b240229f07f8a5f3a240220018b38d7dcd314e734c9276bd6fb40f673325bc4baa144c800d2f2f02db2765c01").unwrap(),
-                                Vec::from_hex("03d2e15674941bad4a996372cb87e1856d3652606d98562fe39c5e9e7e413f2105").unwrap(),
-                            ]),
-                        },
-                        TxIn {
-                            previous_output: OutPoint {
-                                txid: Txid::from_hex(
-                                    "b490486aec3ae671012dddb2bb08466bef37720a533a894814ff1da743aaf886",
-                                ).unwrap(),
-                                vout: 1,
-                            },
-                            script_sig: hex_script!("160014fe3e9ef1a745e974d902c4355943abcb34bd5353"),
-                            sequence: 4294967295,
-                            witness: Witness::from_vec(vec![
-                                Vec::from_hex("3045022100d12b852d85dcd961d2f5f4ab660654df6eedcc794c0c33ce5cc309ffb5fce58d022067338a8e0e1725c197fb1a88af59f51e44e4255b20167c8684031c05d1f2592a01").unwrap(),
-                                Vec::from_hex("0223b72beef0965d10be0778efecd61fcac6f79a4ea169393380734464f84f2ab3").unwrap(),
-                            ]),
-                        }],
-                        output: vec![
-                            TxOut {
-                                value: 200000000,
-                                script_pubkey: hex_script!("76a91485cff1097fd9e008bb34af709c62197b38978a4888ac"),
-                            },
-                            TxOut {
-                                value: 190303501938,
-                                script_pubkey: hex_script!("a914339725ba21efd62ac753a9bcd067d6c7a6a39d0587"),
-                            },
-                        ],
-                        special_transaction_payload: None
-                    }),
-                    ..Default::default()
-                },],
+                inputs: vec![
+                    Input {
+                        non_witness_utxo: Some(Transaction {
+                            version: 1,
+                            lock_time: 0,
+                            input: vec![
+                                TxIn {
+                                    previous_output: OutPoint {
+                                        txid: "e567952fb6cc33857f392efa3a46c995a28f69cca4bb1b37e0204dab1ec7a389".parse().unwrap(),
+                                        vout: 1,
+                                    },
+                                    script_sig: ScriptBuf::from_hex("160014be18d152a9b012039daf3da7de4f53349eecb985").unwrap(),
+                                    sequence: u32::MAX,
+                                    witness: Witness::from_slice(&[
+                                        hex!("304402202712be22e0270f394f568311dc7ca9a68970b8025fdd3b240229f07f8a5f3a240220018b38d7dcd314e734c9276bd6fb40f673325bc4baa144c800d2f2f02db2765c01"),
+                                        hex!("03d2e15674941bad4a996372cb87e1856d3652606d98562fe39c5e9e7e413f2105"),
+                                    ]),
+                                },
+                                TxIn {
+                                    previous_output: OutPoint {
+                                        txid: "b490486aec3ae671012dddb2bb08466bef37720a533a894814ff1da743aaf886".parse().unwrap(),
+                                        vout: 1,
+                                    },
+                                    script_sig: ScriptBuf::from_hex("160014fe3e9ef1a745e974d902c4355943abcb34bd5353").unwrap(),
+                                    sequence: u32::MAX,
+                                    witness: Witness::from_slice(&[
+                                        hex!("3045022100d12b852d85dcd961d2f5f4ab660654df6eedcc794c0c33ce5cc309ffb5fce58d022067338a8e0e1725c197fb1a88af59f51e44e4255b20167c8684031c05d1f2592a01"),
+                                        hex!("0223b72beef0965d10be0778efecd61fcac6f79a4ea169393380734464f84f2ab3"),
+                                    ]),
+                                },
+                            ],
+                            output: vec![
+                                TxOut {
+                                    value: 200000000,
+                                    script_pubkey: ScriptBuf::from_hex("76a91485cff1097fd9e008bb34af709c62197b38978a4888ac").unwrap(),
+                                },
+                                TxOut {
+                                    value: 190303501938,
+                                    script_pubkey: ScriptBuf::from_hex("a914339725ba21efd62ac753a9bcd067d6c7a6a39d0587").unwrap(),
+                                },
+                            ],
+                            special_transaction_payload: None,
+                        }),
+                        ..Default::default()
+                    },
+                ],
                 outputs: vec![
                     Output {
                         ..Default::default()
@@ -753,16 +1262,20 @@ mod tests {
                 ],
             };
 
-            let base16str = "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";
+            let base16str = "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";
 
-            assert_eq!(serialize_hex(&unserialized), base16str);
+            assert_eq!(unserialized.serialize_hex(), base16str);
             assert_eq!(unserialized, hex_psbt!(base16str).unwrap());
 
-            #[cfg(feature = "base64")] {
-                let base64str = "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";
+            #[cfg(feature = "base64")]
+            {
+                let base64str = "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";
                 assert_eq!(PartiallySignedTransaction::from_str(base64str).unwrap(), unserialized);
                 assert_eq!(base64str, unserialized.to_string());
-                assert_eq!(PartiallySignedTransaction::from_str(base64str).unwrap(), hex_psbt!(base16str).unwrap());
+                assert_eq!(
+                    PartiallySignedTransaction::from_str(base64str).unwrap(),
+                    hex_psbt!(base16str).unwrap()
+                );
             }
         }
 
@@ -775,8 +1288,9 @@ mod tests {
 
             assert!(&psbt.inputs[0].final_script_sig.is_some());
 
-            let redeem_script: &Script = &psbt.inputs[1].redeem_script.as_ref().unwrap();
-            let expected_out = hex_script!("a9143545e6e33b832c47050f24d3eeb93c9c03948bc787");
+            let redeem_script = psbt.inputs[1].redeem_script.as_ref().unwrap();
+            let expected_out =
+                ScriptBuf::from_hex("a9143545e6e33b832c47050f24d3eeb93c9c03948bc787").unwrap();
 
             assert!(redeem_script.is_v0_p2wpkh());
             assert_eq!(
@@ -786,7 +1300,7 @@ mod tests {
             assert_eq!(redeem_script.to_p2sh(), expected_out);
 
             for output in psbt.outputs {
-                assert_eq!(output.get_pairs().unwrap().len(), 0)
+                assert_eq!(output.get_pairs().len(), 0)
             }
         }
 
@@ -798,15 +1312,14 @@ mod tests {
             assert_eq!(psbt.outputs.len(), 2);
 
             let tx_input = &psbt.unsigned_tx.input[0];
-            let psbt_non_witness_utxo = (&psbt.inputs[0].non_witness_utxo).as_ref().unwrap();
+            let psbt_non_witness_utxo = psbt.inputs[0].non_witness_utxo.as_ref().unwrap();
 
             assert_eq!(tx_input.previous_output.txid, psbt_non_witness_utxo.txid());
             assert!(psbt_non_witness_utxo.output[tx_input.previous_output.vout as usize]
-                    .script_pubkey
-                    .is_p2pkh()
-            );
+                .script_pubkey
+                .is_p2pkh());
             assert_eq!(
-                (&psbt.inputs[0].sighash_type).as_ref().unwrap().ecdsa_hash_ty().unwrap(),
+                psbt.inputs[0].sighash_type.as_ref().unwrap().ecdsa_hash_ty().unwrap(),
                 EcdsaSighashType::All
             );
         }
@@ -821,8 +1334,9 @@ mod tests {
             assert!(&psbt.inputs[0].final_script_sig.is_none());
             assert!(&psbt.inputs[1].final_script_sig.is_none());
 
-            let redeem_script: &Script = &psbt.inputs[1].redeem_script.as_ref().unwrap();
-            let expected_out = hex_script!("a9143545e6e33b832c47050f24d3eeb93c9c03948bc787");
+            let redeem_script = psbt.inputs[1].redeem_script.as_ref().unwrap();
+            let expected_out =
+                ScriptBuf::from_hex("a9143545e6e33b832c47050f24d3eeb93c9c03948bc787").unwrap();
 
             assert!(redeem_script.is_v0_p2wpkh());
             assert_eq!(
@@ -832,7 +1346,7 @@ mod tests {
             assert_eq!(redeem_script.to_p2sh(), expected_out);
 
             for output in psbt.outputs {
-                assert!(output.get_pairs().unwrap().len() > 0)
+                assert!(!output.get_pairs().is_empty())
             }
         }
 
@@ -845,8 +1359,9 @@ mod tests {
 
             assert!(&psbt.inputs[0].final_script_sig.is_none());
 
-            let redeem_script: &Script = &psbt.inputs[0].redeem_script.as_ref().unwrap();
-            let expected_out = hex_script!("a9146345200f68d189e1adc0df1c4d16ea8f14c0dbeb87");
+            let redeem_script = psbt.inputs[0].redeem_script.as_ref().unwrap();
+            let expected_out =
+                ScriptBuf::from_hex("a9146345200f68d189e1adc0df1c4d16ea8f14c0dbeb87").unwrap();
 
             assert!(redeem_script.is_v0_p2wsh());
             assert_eq!(
@@ -867,15 +1382,12 @@ mod tests {
             let tx = &psbt.unsigned_tx;
             assert_eq!(
                 tx.txid(),
-                Txid::from_hex("75c5c9665a570569ad77dd1279e6fd4628a093c4dcbf8d41532614044c14c115").unwrap(),
+                "75c5c9665a570569ad77dd1279e6fd4628a093c4dcbf8d41532614044c14c115".parse().unwrap(),
             );
 
             let mut unknown: BTreeMap<raw::Key, Vec<u8>> = BTreeMap::new();
-            let key: raw::Key = raw::Key {
-                type_value: 0x0fu8,
-                key: Vec::from_hex("010203040506070809").unwrap(),
-            };
-            let value: Vec<u8> = Vec::from_hex("0102030405060708090a0b0c0d0e0f").unwrap();
+            let key: raw::Key = raw::Key { type_value: 0x0fu8, key: hex!("010203040506070809") };
+            let value: Vec<u8> = hex!("0102030405060708090a0b0c0d0e0f");
 
             unknown.insert(key, value);
 
@@ -885,39 +1397,58 @@ mod tests {
 
     mod bip_371_vectors {
         use super::*;
-        use super::serialize;
 
         #[test]
         fn invalid_vectors() {
             let err = hex_psbt!("70736274ff010071020000000127744ababf3027fe0d6cf23a96eee2efb188ef52301954585883e69b6624b2420000000000ffffffff02787c01000000000016001483a7e34bd99ff03a4962ef8a1a101bb295461ece606b042a010000001600147ac369df1b20e033d6116623957b0ac49f3c52e8000000000001012b00f2052a010000002251205a2c2cf5b52cf31f83ad2e8da63ff03183ecd8f609c7510ae8a48e03910a075701172102fe349064c98d6e2a853fa3c9b12bd8b304a19c195c60efa7ee2393046d3fa232000000").unwrap_err();
-            assert_eq!(err.to_string(), "parse failed: Invalid xonly public key");
+            assert_eq!(err.to_string(), "invalid xonly public key");
             let err = hex_psbt!("70736274ff010071020000000127744ababf3027fe0d6cf23a96eee2efb188ef52301954585883e69b6624b2420000000000ffffffff02787c01000000000016001483a7e34bd99ff03a4962ef8a1a101bb295461ece606b042a010000001600147ac369df1b20e033d6116623957b0ac49f3c52e8000000000001012b00f2052a010000002251205a2c2cf5b52cf31f83ad2e8da63ff03183ecd8f609c7510ae8a48e03910a0757011342173bb3d36c074afb716fec6307a069a2e450b995f3c82785945ab8df0e24260dcd703b0cbf34de399184a9481ac2b3586db6601f026a77f7e4938481bc34751701aa000000").unwrap_err();
-            assert_eq!(err.to_string(), "parse failed: Invalid Schnorr signature length");
+            #[cfg(feature = "std")]
+            assert_eq!(err.to_string(), "invalid taproot signature");
+            #[cfg(not(feature = "std"))]
+            assert_eq!(
+                err.to_string(),
+                "invalid taproot signature: invalid taproot signature size: 66"
+            );
             let err = hex_psbt!("70736274ff010071020000000127744ababf3027fe0d6cf23a96eee2efb188ef52301954585883e69b6624b2420000000000ffffffff02787c01000000000016001483a7e34bd99ff03a4962ef8a1a101bb295461ece606b042a010000001600147ac369df1b20e033d6116623957b0ac49f3c52e8000000000001012b00f2052a010000002251205a2c2cf5b52cf31f83ad2e8da63ff03183ecd8f609c7510ae8a48e03910a0757221602fe349064c98d6e2a853fa3c9b12bd8b304a19c195c60efa7ee2393046d3fa2321900772b2da75600008001000080000000800100000000000000000000").unwrap_err();
-            assert_eq!(err.to_string(), "parse failed: Invalid xonly public key");
+            assert_eq!(err.to_string(), "invalid xonly public key");
             let err = hex_psbt!("70736274ff01007d020000000127744ababf3027fe0d6cf23a96eee2efb188ef52301954585883e69b6624b2420000000000ffffffff02887b0100000000001600142382871c7e8421a00093f754d91281e675874b9f606b042a010000002251205a2c2cf5b52cf31f83ad2e8da63ff03183ecd8f609c7510ae8a48e03910a0757000000000001012b00f2052a010000002251205a2c2cf5b52cf31f83ad2e8da63ff03183ecd8f609c7510ae8a48e03910a0757000001052102fe349064c98d6e2a853fa3c9b12bd8b304a19c195c60efa7ee2393046d3fa23200").unwrap_err();
-            assert_eq!(err.to_string(), "parse failed: Invalid xonly public key");
+            assert_eq!(err.to_string(), "invalid xonly public key");
             let err = hex_psbt!("70736274ff01007d020000000127744ababf3027fe0d6cf23a96eee2efb188ef52301954585883e69b6624b2420000000000ffffffff02887b0100000000001600142382871c7e8421a00093f754d91281e675874b9f606b042a010000002251205a2c2cf5b52cf31f83ad2e8da63ff03183ecd8f609c7510ae8a48e03910a0757000000000001012b00f2052a010000002251205a2c2cf5b52cf31f83ad2e8da63ff03183ecd8f609c7510ae8a48e03910a07570000220702fe349064c98d6e2a853fa3c9b12bd8b304a19c195c60efa7ee2393046d3fa2321900772b2da7560000800100008000000080010000000000000000").unwrap_err();
-            assert_eq!(err.to_string(), "parse failed: Invalid xonly public key");
+            assert_eq!(err.to_string(), "invalid xonly public key");
             let err = hex_psbt!("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").unwrap_err();
-            assert_eq!(err.to_string(), "PSBT error: Hash Parse Error: bad slice length 33 (expected 32)");
+            #[cfg(feature = "std")]
+            assert_eq!(err.to_string(), "hash parse error");
+            #[cfg(not(feature = "std"))]
+            assert_eq!(err.to_string(), "hash parse error: invalid slice length 33 (expected 32)");
             let err = hex_psbt!("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").unwrap_err();
-            assert_eq!(err.to_string(), "parse failed: Invalid Schnorr signature length");
+            #[cfg(feature = "std")]
+            assert_eq!(err.to_string(), "invalid taproot signature");
+            #[cfg(not(feature = "std"))]
+            assert_eq!(
+                err.to_string(),
+                "invalid taproot signature: invalid taproot signature size: 66"
+            );
             let err = hex_psbt!("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").unwrap_err();
-            assert_eq!(err.to_string(), "parse failed: Invalid Schnorr signature length");
+            #[cfg(feature = "std")]
+            assert_eq!(err.to_string(), "invalid taproot signature");
+            #[cfg(not(feature = "std"))]
+            assert_eq!(
+                err.to_string(),
+                "invalid taproot signature: invalid taproot signature size: 57"
+            );
             let err = hex_psbt!("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").unwrap_err();
-            assert_eq!(err.to_string(), "parse failed: Invalid control block");
+            assert_eq!(err.to_string(), "invalid control block");
             let err = hex_psbt!("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").unwrap_err();
-            assert_eq!(err.to_string(), "parse failed: Invalid control block");
+            assert_eq!(err.to_string(), "invalid control block");
         }
 
         fn rtt_psbt(psbt: PartiallySignedTransaction) {
-            let enc = serialize(&psbt);
-            let psbt2 = deserialize::<PartiallySignedTransaction>(&enc).unwrap();
+            let enc = Psbt::serialize(&psbt);
+            let psbt2 = Psbt::deserialize(&enc).unwrap();
             assert_eq!(psbt, psbt2);
         }
 
-        #[ignore]
         #[test]
         fn valid_psbt_vectors() {
             let psbt = hex_psbt!("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").unwrap();
@@ -964,7 +1495,6 @@ mod tests {
         }
     }
 
-    #[ignore]
     #[test]
     fn serialize_and_deserialize_preimage_psbt() {
         // create a sha preimage map
@@ -982,80 +1512,80 @@ mod tests {
             unsigned_tx: Transaction {
                 version: 2,
                 lock_time: 1257139,
-                input: vec![TxIn {
-                    previous_output: OutPoint {
-                        txid: Txid::from_hex(
-                            "f61b1742ca13176464adb3cb66050c00787bb3a4eead37e985f2df1e37718126",
-                        ).unwrap(),
-                        vout: 0,
-                    },
-                    script_sig: Script::new(),
-                    sequence: 4294967294,
-                    witness: Witness::default(),
-                }],
+                input: vec![
+                    TxIn {
+                        previous_output: OutPoint {
+                            txid: "f61b1742ca13176464adb3cb66050c00787bb3a4eead37e985f2df1e37718126".parse().unwrap(),
+                            vout: 0,
+                        },
+                        script_sig: ScriptBuf::new(),
+                        sequence: 0,
+                        witness: Witness::default(),
+                    }
+                ],
                 output: vec![
                     TxOut {
                         value: 99999699,
-                        script_pubkey: hex_script!("76a914d0c59903c5bac2868760e90fd521a4665aa7652088ac"),
+                        script_pubkey: ScriptBuf::from_hex("76a914d0c59903c5bac2868760e90fd521a4665aa7652088ac").unwrap(),
                     },
                     TxOut {
                         value: 100000000,
-                        script_pubkey: hex_script!("a9143545e6e33b832c47050f24d3eeb93c9c03948bc787"),
+                        script_pubkey: ScriptBuf::from_hex("a9143545e6e33b832c47050f24d3eeb93c9c03948bc787").unwrap(),
                     },
                 ],
-                special_transaction_payload: None
+                special_transaction_payload: None,
             },
             version: 0,
             xpub: Default::default(),
             proprietary: Default::default(),
             unknown: BTreeMap::new(),
 
-            inputs: vec![Input {
-                non_witness_utxo: Some(Transaction {
-                    version: 1,
-                    lock_time: 0,
-                    input: vec![TxIn {
-                        previous_output: OutPoint {
-                            txid: Txid::from_hex(
-                                "e567952fb6cc33857f392efa3a46c995a28f69cca4bb1b37e0204dab1ec7a389",
-                            ).unwrap(),
-                            vout: 1,
-                        },
-                        script_sig: hex_script!("160014be18d152a9b012039daf3da7de4f53349eecb985"),
-                        sequence: 4294967295,
-                        witness: Witness::from_vec(vec![
-                            Vec::from_hex("304402202712be22e0270f394f568311dc7ca9a68970b8025fdd3b240229f07f8a5f3a240220018b38d7dcd314e734c9276bd6fb40f673325bc4baa144c800d2f2f02db2765c01").unwrap(),
-                            Vec::from_hex("03d2e15674941bad4a996372cb87e1856d3652606d98562fe39c5e9e7e413f2105").unwrap(),
-                        ]),
-                    },
-                    TxIn {
-                        previous_output: OutPoint {
-                            txid: Txid::from_hex(
-                                "b490486aec3ae671012dddb2bb08466bef37720a533a894814ff1da743aaf886",
-                            ).unwrap(),
-                            vout: 1,
-                        },
-                        script_sig: hex_script!("160014fe3e9ef1a745e974d902c4355943abcb34bd5353"),
-                        sequence: 4294967295,
-                        witness: Witness::from_vec(vec![
-                            Vec::from_hex("3045022100d12b852d85dcd961d2f5f4ab660654df6eedcc794c0c33ce5cc309ffb5fce58d022067338a8e0e1725c197fb1a88af59f51e44e4255b20167c8684031c05d1f2592a01").unwrap(),
-                            Vec::from_hex("0223b72beef0965d10be0778efecd61fcac6f79a4ea169393380734464f84f2ab3").unwrap(),
-                        ]),
-                    }],
-                    output: vec![
-                        TxOut {
-                            value: 200000000,
-                            script_pubkey: hex_script!("76a91485cff1097fd9e008bb34af709c62197b38978a4888ac"),
-                        },
-                        TxOut {
-                            value: 190303501938,
-                            script_pubkey: hex_script!("a914339725ba21efd62ac753a9bcd067d6c7a6a39d0587"),
-                        },
-                    ],
-                    special_transaction_payload: None
-                }),
-                ..Default::default()
-            },],
+            inputs: vec![
+                Input {
+                    non_witness_utxo: Some(Transaction {
+                        version: 1,
+                        lock_time: 0,
+                        input: vec![
+                            TxIn {
+                                previous_output: OutPoint {
+                                    txid: "e567952fb6cc33857f392efa3a46c995a28f69cca4bb1b37e0204dab1ec7a389".parse().unwrap(),
+                                    vout: 1,
+                                },
+                                script_sig: ScriptBuf::from_hex("160014be18d152a9b012039daf3da7de4f53349eecb985").unwrap(),
+                                sequence: u32::MAX,
+                                witness: Witness::from_slice(&[
+                                    hex!("304402202712be22e0270f394f568311dc7ca9a68970b8025fdd3b240229f07f8a5f3a240220018b38d7dcd314e734c9276bd6fb40f673325bc4baa144c800d2f2f02db2765c01"),
+                                    hex!("03d2e15674941bad4a996372cb87e1856d3652606d98562fe39c5e9e7e413f2105"),
+                                ]),
+                            },
+                            TxIn {
+                                previous_output: OutPoint {
+                                    txid: "b490486aec3ae671012dddb2bb08466bef37720a533a894814ff1da743aaf886".parse().unwrap(),
+                                    vout: 1,
+                                },
+                                script_sig: ScriptBuf::from_hex("160014fe3e9ef1a745e974d902c4355943abcb34bd5353").unwrap(),
+                                sequence: u32::MAX,
+                                witness: Witness::from_slice(&[
+                                    hex!("3045022100d12b852d85dcd961d2f5f4ab660654df6eedcc794c0c33ce5cc309ffb5fce58d022067338a8e0e1725c197fb1a88af59f51e44e4255b20167c8684031c05d1f2592a01"),
+                                    hex!("0223b72beef0965d10be0778efecd61fcac6f79a4ea169393380734464f84f2ab3"),
+                                ]),
+                            },
+                        ],
+                        output: vec![
+                            TxOut {
+                                value: 200000000,
+                                script_pubkey: ScriptBuf::from_hex("76a91485cff1097fd9e008bb34af709c62197b38978a4888ac").unwrap(),
+                            },
+                            TxOut {
+                                value: 190303501938,
+                                script_pubkey: ScriptBuf::from_hex("a914339725ba21efd62ac753a9bcd067d6c7a6a39d0587").unwrap(),
+                            },
+                        ],
+                        special_transaction_payload: None,
+                    }),
+                    ..Default::default()
+                },
+            ],
             outputs: vec![
                 Output {
                     ..Default::default()
@@ -1068,7 +1598,7 @@ mod tests {
         unserialized.inputs[0].hash160_preimages = hash160_preimages;
         unserialized.inputs[0].sha256_preimages = sha256_preimages;
 
-        let rtt: PartiallySignedTransaction = hex_psbt!(&serialize_hex(&unserialized)).unwrap();
+        let rtt: PartiallySignedTransaction = hex_psbt!(&unserialized.serialize_hex()).unwrap();
         assert_eq!(rtt, unserialized);
 
         // Now add an ripemd160 with incorrect preimage
@@ -1077,30 +1607,28 @@ mod tests {
         unserialized.inputs[0].ripemd160_preimages = ripemd160_preimages;
 
         // Now the roundtrip should fail as the preimage is incorrect.
-        let rtt: Result<PartiallySignedTransaction, _> = hex_psbt!(&serialize_hex(&unserialized));
+        let rtt: Result<PartiallySignedTransaction, _> = hex_psbt!(&unserialized.serialize_hex());
         assert!(rtt.is_err());
     }
 
-    #[ignore]
     #[test]
     fn serialize_and_deserialize_proprietary() {
         let mut psbt: PartiallySignedTransaction = hex_psbt!("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").unwrap();
-        psbt.proprietary.insert(raw::ProprietaryKey {
-            prefix: b"test".to_vec(),
-            subtype: 0u8,
-            key: b"test".to_vec(),
-        }, b"test".to_vec());
+        psbt.proprietary.insert(
+            raw::ProprietaryKey { prefix: b"test".to_vec(), subtype: 0u8, key: b"test".to_vec() },
+            b"test".to_vec(),
+        );
         assert!(!psbt.proprietary.is_empty());
-        let rtt: PartiallySignedTransaction = hex_psbt!(&serialize_hex(&psbt)).unwrap();
+        let rtt: PartiallySignedTransaction = hex_psbt!(&psbt.serialize_hex()).unwrap();
         assert!(!rtt.proprietary.is_empty());
     }
 
     // PSBTs taken from BIP 174 test vectors.
     #[test]
     fn combine_psbts() {
-        let mut psbt1 = hex_psbt!(include_str!("../../../test_data/psbt1.hex")).unwrap();
-        let psbt2 = hex_psbt!(include_str!("../../../test_data/psbt2.hex")).unwrap();
-        let psbt_combined = hex_psbt!(include_str!("../../../test_data/psbt2.hex")).unwrap();
+        let mut psbt1 = hex_psbt!(include_str!("../../tests/data/psbt1.hex")).unwrap();
+        let psbt2 = hex_psbt!(include_str!("../../tests/data/psbt2.hex")).unwrap();
+        let psbt_combined = hex_psbt!(include_str!("../../tests/data/psbt2.hex")).unwrap();
 
         psbt1.combine(psbt2).expect("psbt combine to succeed");
         assert_eq!(psbt1, psbt_combined);
@@ -1108,8 +1636,8 @@ mod tests {
 
     #[test]
     fn combine_psbts_commutative() {
-        let mut psbt1 = hex_psbt!(include_str!("../../../test_data/psbt1.hex")).unwrap();
-        let mut psbt2 = hex_psbt!(include_str!("../../../test_data/psbt2.hex")).unwrap();
+        let mut psbt1 = hex_psbt!(include_str!("../../tests/data/psbt1.hex")).unwrap();
+        let mut psbt2 = hex_psbt!(include_str!("../../tests/data/psbt2.hex")).unwrap();
 
         let psbt1_clone = psbt1.clone();
         let psbt2_clone = psbt2.clone();
@@ -1119,4 +1647,187 @@ mod tests {
 
         assert_eq!(psbt1, psbt2);
     }
+
+    #[cfg(feature = "rand-std")]
+    fn gen_keys() -> (PrivateKey, PublicKey, Secp256k1<All>) {
+        use secp256k1::rand::thread_rng;
+
+        let secp = Secp256k1::new();
+
+        let sk = SecretKey::new(&mut thread_rng());
+        let priv_key = PrivateKey::new(sk, crate::Network::Regtest);
+        let pk = PublicKey::from_private_key(&secp, &priv_key);
+
+        (priv_key, pk, secp)
+    }
+
+    #[test]
+    #[cfg(feature = "rand-std")]
+    fn get_key_btree_map() {
+        let (priv_key, pk, secp) = gen_keys();
+
+        let mut key_map = BTreeMap::new();
+        key_map.insert(pk, priv_key);
+
+        let got = key_map.get_key(KeyRequest::Pubkey(pk), &secp).expect("failed to get key");
+        assert_eq!(got.unwrap(), priv_key)
+    }
+
+    #[test]
+    fn test_fee() {
+        let output_0_val = 99999699;
+        let output_1_val = 100000000;
+        let prev_output_val = 200000000;
+
+        let mut t = PartiallySignedTransaction {
+            unsigned_tx: Transaction {
+                version: 2,
+                lock_time: 1257139,
+                input: vec![
+                    TxIn {
+                        previous_output: OutPoint {
+                            txid: "f61b1742ca13176464adb3cb66050c00787bb3a4eead37e985f2df1e37718126".parse().unwrap(),
+                            vout: 0,
+                        },
+                        sequence: 0,
+                        ..Default::default()
+                    }
+                ],
+                output: vec![
+                    TxOut {
+                        value: output_0_val,
+                        ..Default::default()
+                    },
+                    TxOut {
+                        value: output_1_val,
+                        ..Default::default()
+                    },
+                ],
+                special_transaction_payload: None,
+            },
+            xpub: Default::default(),
+            version: 0,
+            proprietary: BTreeMap::new(),
+            unknown: BTreeMap::new(),
+
+            inputs: vec![
+                Input {
+                    non_witness_utxo: Some(Transaction {
+                        version: 1,
+                        lock_time: 0,
+                        input: vec![
+                            TxIn {
+                                previous_output: OutPoint {
+                                    txid: "e567952fb6cc33857f392efa3a46c995a28f69cca4bb1b37e0204dab1ec7a389".parse().unwrap(),
+                                    vout: 1,
+                                },
+                                sequence: u32::MAX,
+                                ..Default::default()
+                            },
+                            TxIn {
+                                previous_output: OutPoint {
+                                    txid: "b490486aec3ae671012dddb2bb08466bef37720a533a894814ff1da743aaf886".parse().unwrap(),
+                                    vout: 1,
+                                },
+                                sequence: u32::MAX,
+                                ..Default::default()
+                            },
+                        ],
+                        output: vec![
+                            TxOut {
+                                value: prev_output_val,
+                                ..Default::default()
+                            },
+                            TxOut {
+                                value: 190303501938,
+                                ..Default::default()
+                            },
+                        ],
+                        special_transaction_payload: None,
+                    }),
+                    ..Default::default()
+                },
+            ],
+            outputs: vec![
+                Output {
+                    ..Default::default()
+                },
+                Output {
+                    ..Default::default()
+                },
+            ],
+        };
+        assert_eq!(
+            t.fee().expect("fee calculation"),
+            Amount::from_sat(prev_output_val - (output_0_val + output_1_val))
+        );
+        // no previous output
+        let mut t2 = t.clone();
+        t2.inputs[0].non_witness_utxo = None;
+        match t2.fee().unwrap_err() {
+            Error::MissingUtxo => {}
+            e => panic!("unexpected error: {:?}", e),
+        }
+        //  negative fee
+        let mut t3 = t.clone();
+        t3.unsigned_tx.output[0].value = prev_output_val;
+        match t3.fee().unwrap_err() {
+            Error::NegativeFee => {}
+            e => panic!("unexpected error: {:?}", e),
+        }
+        // overflow
+        t.unsigned_tx.output[0].value = u64::max_value();
+        t.unsigned_tx.output[1].value = u64::max_value();
+        match t.fee().unwrap_err() {
+            Error::FeeOverflow => {}
+            e => panic!("unexpected error: {:?}", e),
+        }
+    }
+
+    #[test]
+    #[cfg(feature = "rand-std")]
+    fn sign_psbt() {
+        use crate::address::WitnessProgram;
+        use crate::bip32::{DerivationPath, Fingerprint};
+        use crate::WPubkeyHash;
+
+        let unsigned_tx = Transaction {
+            version: 2,
+            lock_time: 0,
+            input: vec![TxIn::default(), TxIn::default()],
+            output: vec![TxOut::default()],
+            special_transaction_payload: None,
+        };
+        let mut psbt = PartiallySignedTransaction::from_unsigned_tx(unsigned_tx).unwrap();
+
+        let (priv_key, pk, secp) = gen_keys();
+
+        // key_map implements `GetKey` using KeyRequest::Pubkey. A pubkey key request does not use
+        // keysource so we use default `KeySource` (fingreprint and derivation path) below.
+        let mut key_map = BTreeMap::new();
+        key_map.insert(pk, priv_key);
+
+        // First input we can spend. See comment above on key_map for why we use defaults here.
+        let txout_wpkh = TxOut {
+            value: 10,
+            script_pubkey: ScriptBuf::new_v0_p2wpkh(&WPubkeyHash::hash(&pk.to_bytes())),
+        };
+        psbt.inputs[0].witness_utxo = Some(txout_wpkh);
+
+        let mut map = BTreeMap::new();
+        map.insert(pk.inner, (Fingerprint::default(), DerivationPath::default()));
+        psbt.inputs[0].bip32_derivation = map;
+
+        // Second input is unspendable by us e.g., from another wallet that supports future upgrades.
+        let unknown_prog =
+            WitnessProgram::new(crate::address::WitnessVersion::V4, vec![0xaa; 34]).unwrap();
+        let txout_unknown_future =
+            TxOut { value: 10, script_pubkey: ScriptBuf::new_witness_program(&unknown_prog) };
+        psbt.inputs[1].witness_utxo = Some(txout_unknown_future);
+
+        let sigs = psbt.sign(&key_map, &secp).unwrap();
+
+        assert!(sigs.len() == 1);
+        assert!(sigs[&0] == vec![pk]);
+    }
 }
diff --git a/dash/src/psbt/raw.rs b/dash/src/psbt/raw.rs
new file mode 100644
index 000000000..aa312413a
--- /dev/null
+++ b/dash/src/psbt/raw.rs
@@ -0,0 +1,210 @@
+// SPDX-License-Identifier: CC0-1.0
+
+//! Raw PSBT key-value pairs.
+//!
+//! Raw PSBT key-value pairs as defined at
+//! <https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki>.
+//!
+
+use core::convert::TryFrom;
+use core::fmt;
+
+use super::serialize::{Deserialize, Serialize};
+use crate::consensus::encode::{
+    self, deserialize, serialize, Decodable, Encodable, ReadExt, VarInt, WriteExt, MAX_VEC_SIZE,
+};
+use crate::io;
+use crate::prelude::*;
+use crate::psbt::Error;
+
+/// A PSBT key in its raw byte form.
+#[derive(Debug, PartialEq, Hash, Eq, Clone, Ord, PartialOrd)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Key {
+    /// The type of this PSBT key.
+    pub type_value: u8,
+    /// The key itself in raw byte form.
+    /// `<key> := <keylen> <keytype> <keydata>`
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::hex_bytes"))]
+    pub key: Vec<u8>,
+}
+
+/// A PSBT key-value pair in its raw byte form.
+/// `<keypair> := <key> <value>`
+#[derive(Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct Pair {
+    /// The key of this key-value pair.
+    pub key: Key,
+    /// The value data of this key-value pair in raw byte form.
+    /// `<value> := <valuelen> <valuedata>`
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::hex_bytes"))]
+    pub value: Vec<u8>,
+}
+
+/// Default implementation for proprietary key subtyping
+pub type ProprietaryType = u8;
+
+/// Proprietary keys (i.e. keys starting with 0xFC byte) with their internal
+/// structure according to BIP 174.
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub struct ProprietaryKey<Subtype = ProprietaryType>
+where
+    Subtype: Copy + From<u8> + Into<u8>,
+{
+    /// Proprietary type prefix used for grouping together keys under some
+    /// application and avoid namespace collision
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::hex_bytes"))]
+    pub prefix: Vec<u8>,
+    /// Custom proprietary subtype
+    pub subtype: Subtype,
+    /// Additional key bytes (like serialized public key data etc)
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::hex_bytes"))]
+    pub key: Vec<u8>,
+}
+
+impl fmt::Display for Key {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "type: {:#x}, key: {:x}", self.type_value, self.key.as_hex())
+    }
+}
+
+impl Key {
+    pub(crate) fn decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        let VarInt(byte_size): VarInt = Decodable::consensus_decode(r)?;
+
+        if byte_size == 0 {
+            return Err(Error::NoMorePairs);
+        }
+
+        let key_byte_size: u64 = byte_size - 1;
+
+        if key_byte_size > MAX_VEC_SIZE as u64 {
+            return Err(encode::Error::OversizedVectorAllocation {
+                requested: key_byte_size as usize,
+                max: MAX_VEC_SIZE,
+            })?;
+        }
+
+        let type_value: u8 = Decodable::consensus_decode(r)?;
+
+        let mut key = Vec::with_capacity(key_byte_size as usize);
+        for _ in 0..key_byte_size {
+            key.push(Decodable::consensus_decode(r)?);
+        }
+
+        Ok(Key { type_value, key })
+    }
+}
+
+impl Serialize for Key {
+    fn serialize(&self) -> Vec<u8> {
+        let mut buf = Vec::new();
+        VarInt((self.key.len() + 1) as u64)
+            .consensus_encode(&mut buf)
+            .expect("in-memory writers don't error");
+
+        self.type_value.consensus_encode(&mut buf).expect("in-memory writers don't error");
+
+        for key in &self.key {
+            key.consensus_encode(&mut buf).expect("in-memory writers don't error");
+        }
+
+        buf
+    }
+}
+
+impl Serialize for Pair {
+    fn serialize(&self) -> Vec<u8> {
+        let mut buf = Vec::new();
+        buf.extend(self.key.serialize());
+        // <value> := <valuelen> <valuedata>
+        self.value.consensus_encode(&mut buf).unwrap();
+        buf
+    }
+}
+
+impl Deserialize for Pair {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        let mut decoder = bytes;
+        Pair::decode(&mut decoder)
+    }
+}
+
+impl Pair {
+    pub(crate) fn decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, Error> {
+        Ok(Pair { key: Key::decode(r)?, value: Decodable::consensus_decode(r)? })
+    }
+}
+
+impl<Subtype> Encodable for ProprietaryKey<Subtype>
+where
+    Subtype: Copy + From<u8> + Into<u8>,
+{
+    fn consensus_encode<W: io::Write + ?Sized>(&self, w: &mut W) -> Result<usize, io::Error> {
+        let mut len = self.prefix.consensus_encode(w)? + 1;
+        w.emit_u8(self.subtype.into())?;
+        w.write_all(&self.key)?;
+        len += self.key.len();
+        Ok(len)
+    }
+}
+
+impl<Subtype> Decodable for ProprietaryKey<Subtype>
+where
+    Subtype: Copy + From<u8> + Into<u8>,
+{
+    fn consensus_decode<R: io::Read + ?Sized>(r: &mut R) -> Result<Self, encode::Error> {
+        let prefix = Vec::<u8>::consensus_decode(r)?;
+        let subtype = Subtype::from(r.read_u8()?);
+        let key = read_to_end(r)?;
+
+        Ok(ProprietaryKey { prefix, subtype, key })
+    }
+}
+
+impl<Subtype> ProprietaryKey<Subtype>
+where
+    Subtype: Copy + From<u8> + Into<u8>,
+{
+    /// Constructs full [Key] corresponding to this proprietary key type
+    pub fn to_key(&self) -> Key { Key { type_value: 0xFC, key: serialize(self) } }
+}
+
+impl<Subtype> TryFrom<Key> for ProprietaryKey<Subtype>
+where
+    Subtype: Copy + From<u8> + Into<u8>,
+{
+    type Error = Error;
+
+    /// Constructs a [`ProprietaryKey`] from a [`Key`].
+    ///
+    /// # Errors
+    /// Returns [`Error::InvalidProprietaryKey`] if `key` does not start with `0xFC` byte.
+    fn try_from(key: Key) -> Result<Self, Self::Error> {
+        if key.type_value != 0xFC {
+            return Err(Error::InvalidProprietaryKey);
+        }
+
+        Ok(deserialize(&key.key)?)
+    }
+}
+
+// core2 doesn't have read_to_end
+pub(crate) fn read_to_end<D: io::Read>(mut d: D) -> Result<Vec<u8>, io::Error> {
+    let mut result = vec![];
+    let mut buf = [0u8; 64];
+    loop {
+        match d.read(&mut buf) {
+            Ok(0) => break,
+            Ok(n) => result.extend_from_slice(&buf[0..n]),
+            Err(ref e) if e.kind() == io::ErrorKind::Interrupted => {}
+            Err(e) => return Err(e),
+        };
+    }
+    Ok(result)
+}
diff --git a/dash/src/psbt/serialize.rs b/dash/src/psbt/serialize.rs
new file mode 100644
index 000000000..ff88fbdbe
--- /dev/null
+++ b/dash/src/psbt/serialize.rs
@@ -0,0 +1,454 @@
+// SPDX-License-Identifier: CC0-1.0
+
+//! PSBT serialization.
+//!
+//! Traits to serialize PSBT values to and from raw bytes
+//! according to the BIP-174 specification.
+//!
+
+use core::convert::{TryFrom, TryInto};
+
+use hashes::{hash160, ripemd160, sha256, sha256d, Hash};
+use secp256k1::{self, XOnlyPublicKey};
+
+use super::map::{Input, Map, Output, PsbtSighashType};
+use super::Psbt;
+use crate::bip32::{ChildNumber, Fingerprint, KeySource};
+use crate::blockdata::script::ScriptBuf;
+use crate::blockdata::transaction::{Transaction, txout::TxOut};
+use crate::blockdata::witness::Witness;
+use crate::consensus::encode::{self, deserialize_partial, serialize, Decodable, Encodable};
+use crate::crypto::key::PublicKey;
+use crate::crypto::{ecdsa, taproot};
+use crate::prelude::*;
+use crate::psbt::{Error, PartiallySignedTransaction};
+use crate::taproot::{
+    ControlBlock, LeafVersion, TapLeafHash, TapNodeHash, TapTree, TaprootBuilder,
+};
+use crate::{io, VarInt};
+/// A trait for serializing a value as raw data for insertion into PSBT
+/// key-value maps.
+pub(crate) trait Serialize {
+    /// Serialize a value as raw data.
+    fn serialize(&self) -> Vec<u8>;
+}
+
+/// A trait for deserializing a value from raw data in PSBT key-value maps.
+pub(crate) trait Deserialize: Sized {
+    /// Deserialize a value from raw data.
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error>;
+}
+
+impl PartiallySignedTransaction {
+    /// Serialize a value as bytes in hex.
+    pub fn serialize_hex(&self) -> String { self.serialize().to_lower_hex_string() }
+
+    /// Serialize as raw binary data
+    pub fn serialize(&self) -> Vec<u8> {
+        let mut buf: Vec<u8> = Vec::new();
+
+        //  <magic>
+        buf.extend_from_slice(b"psbt");
+
+        buf.push(0xff_u8);
+
+        buf.extend(self.serialize_map());
+
+        for i in &self.inputs {
+            buf.extend(i.serialize_map());
+        }
+
+        for i in &self.outputs {
+            buf.extend(i.serialize_map());
+        }
+
+        buf
+    }
+
+    /// Deserialize a value from raw binary data.
+    pub fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        const MAGIC_BYTES: &[u8] = b"psbt";
+        if bytes.get(0..MAGIC_BYTES.len()) != Some(MAGIC_BYTES) {
+            return Err(Error::InvalidMagic);
+        }
+
+        const PSBT_SERPARATOR: u8 = 0xff_u8;
+        if bytes.get(MAGIC_BYTES.len()) != Some(&PSBT_SERPARATOR) {
+            return Err(Error::InvalidSeparator);
+        }
+
+        let mut d = bytes.get(5..).ok_or(Error::NoMorePairs)?;
+
+        let mut global = Psbt::decode_global(&mut d)?;
+        global.unsigned_tx_checks()?;
+
+        let inputs: Vec<Input> = {
+            let inputs_len: usize = (global.unsigned_tx.input).len();
+
+            let mut inputs: Vec<Input> = Vec::with_capacity(inputs_len);
+
+            for _ in 0..inputs_len {
+                inputs.push(Input::decode(&mut d)?);
+            }
+
+            inputs
+        };
+
+        let outputs: Vec<Output> = {
+            let outputs_len: usize = (global.unsigned_tx.output).len();
+
+            let mut outputs: Vec<Output> = Vec::with_capacity(outputs_len);
+
+            for _ in 0..outputs_len {
+                outputs.push(Output::decode(&mut d)?);
+            }
+
+            outputs
+        };
+
+        global.inputs = inputs;
+        global.outputs = outputs;
+        Ok(global)
+    }
+}
+impl_psbt_de_serialize!(Transaction);
+impl_psbt_de_serialize!(TxOut);
+impl_psbt_de_serialize!(Witness);
+impl_psbt_hash_de_serialize!(ripemd160::Hash);
+impl_psbt_hash_de_serialize!(sha256::Hash);
+impl_psbt_hash_de_serialize!(TapLeafHash);
+impl_psbt_hash_de_serialize!(TapNodeHash);
+impl_psbt_hash_de_serialize!(hash160::Hash);
+impl_psbt_hash_de_serialize!(sha256d::Hash);
+
+// taproot
+impl_psbt_de_serialize!(Vec<TapLeafHash>);
+
+impl Serialize for ScriptBuf {
+    fn serialize(&self) -> Vec<u8> { self.to_bytes() }
+}
+
+impl Deserialize for ScriptBuf {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> { Ok(Self::from(bytes.to_vec())) }
+}
+
+impl Serialize for PublicKey {
+    fn serialize(&self) -> Vec<u8> {
+        let mut buf = Vec::new();
+        self.write_into(&mut buf).expect("vecs don't error");
+        buf
+    }
+}
+
+impl Deserialize for PublicKey {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        PublicKey::from_slice(bytes).map_err(Error::InvalidPublicKey)
+    }
+}
+
+impl Serialize for secp256k1::PublicKey {
+    fn serialize(&self) -> Vec<u8> { self.serialize().to_vec() }
+}
+
+impl Deserialize for secp256k1::PublicKey {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        secp256k1::PublicKey::from_slice(bytes).map_err(Error::InvalidSecp256k1PublicKey)
+    }
+}
+
+impl Serialize for ecdsa::Signature {
+    fn serialize(&self) -> Vec<u8> { self.to_vec() }
+}
+
+impl Deserialize for ecdsa::Signature {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        // NB: Since BIP-174 says "the signature as would be pushed to the stack from
+        // a scriptSig or witness" we should ideally use a consensus deserialization and do
+        // not error on a non-standard values. However,
+        //
+        // 1) the current implementation of from_u32_consensus(`flag`) does not preserve
+        // the sighash byte `flag` mapping all unknown values to EcdsaSighashType::All or
+        // EcdsaSighashType::AllPlusAnyOneCanPay. Therefore, break the invariant
+        // EcdsaSig::from_slice(&sl[..]).to_vec = sl.
+        //
+        // 2) This would cause to have invalid signatures because the sighash message
+        // also has a field sighash_u32 (See BIP141). For example, when signing with non-standard
+        // 0x05, the sighash message would have the last field as 0x05u32 while, the verification
+        // would use check the signature assuming sighash_u32 as `0x01`.
+        ecdsa::Signature::from_slice(bytes).map_err(|e| match e {
+            ecdsa::Error::EmptySignature => Error::InvalidEcdsaSignature(e),
+            ecdsa::Error::NonStandardSighashType(flag) => Error::NonStandardSighashType(flag),
+            ecdsa::Error::Secp256k1(..) => Error::InvalidEcdsaSignature(e),
+            ecdsa::Error::HexEncoding(..) => {
+                unreachable!("Decoding from slice, not hex")
+            }
+        })
+    }
+}
+
+impl Serialize for KeySource {
+    fn serialize(&self) -> Vec<u8> {
+        let mut rv: Vec<u8> = Vec::with_capacity(key_source_len(self));
+
+        rv.append(&mut self.0.to_bytes().to_vec());
+
+        for cnum in self.1.into_iter() {
+            rv.append(&mut serialize(&u32::from(*cnum)))
+        }
+
+        rv
+    }
+}
+
+impl Deserialize for KeySource {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        if bytes.len() < 4 {
+            return Err(io::Error::from(io::ErrorKind::UnexpectedEof).into());
+        }
+
+        let fprint: Fingerprint = bytes[0..4].try_into().expect("4 is the fingerprint length");
+        let mut dpath: Vec<ChildNumber> = Default::default();
+
+        let mut d = &bytes[4..];
+        while !d.is_empty() {
+            match u32::consensus_decode(&mut d) {
+                Ok(index) => dpath.push(index.into()),
+                Err(e) => return Err(e)?,
+            }
+        }
+
+        Ok((fprint, dpath.into()))
+    }
+}
+
+// partial sigs
+impl Serialize for Vec<u8> {
+    fn serialize(&self) -> Vec<u8> { self.clone() }
+}
+
+impl Deserialize for Vec<u8> {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> { Ok(bytes.to_vec()) }
+}
+
+impl Serialize for PsbtSighashType {
+    fn serialize(&self) -> Vec<u8> { serialize(&self.to_u32()) }
+}
+
+impl Deserialize for PsbtSighashType {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        let raw: u32 = encode::deserialize(bytes)?;
+        Ok(PsbtSighashType { inner: raw })
+    }
+}
+
+// Taproot related ser/deser
+impl Serialize for XOnlyPublicKey {
+    fn serialize(&self) -> Vec<u8> { XOnlyPublicKey::serialize(self).to_vec() }
+}
+
+impl Deserialize for XOnlyPublicKey {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        XOnlyPublicKey::from_slice(bytes).map_err(|_| Error::InvalidXOnlyPublicKey)
+    }
+}
+
+impl Serialize for taproot::Signature {
+    fn serialize(&self) -> Vec<u8> { self.to_vec() }
+}
+
+impl Deserialize for taproot::Signature {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        taproot::Signature::from_slice(bytes).map_err(|e| match e {
+            taproot::Error::InvalidSighashType(flag) => Error::NonStandardSighashType(flag as u32),
+            taproot::Error::InvalidSignatureSize(_) => Error::InvalidTaprootSignature(e),
+            taproot::Error::Secp256k1(..) => Error::InvalidTaprootSignature(e),
+        })
+    }
+}
+
+impl Serialize for (XOnlyPublicKey, TapLeafHash) {
+    fn serialize(&self) -> Vec<u8> {
+        let ser_pk = self.0.serialize();
+        let mut buf = Vec::with_capacity(ser_pk.len() + self.1.as_byte_array().len());
+        buf.extend(&ser_pk);
+        buf.extend(self.1.as_byte_array());
+        buf
+    }
+}
+
+impl Deserialize for (XOnlyPublicKey, TapLeafHash) {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        if bytes.len() < 32 {
+            return Err(io::Error::from(io::ErrorKind::UnexpectedEof).into());
+        }
+        let a: XOnlyPublicKey = Deserialize::deserialize(&bytes[..32])?;
+        let b: TapLeafHash = Deserialize::deserialize(&bytes[32..])?;
+        Ok((a, b))
+    }
+}
+
+impl Serialize for ControlBlock {
+    fn serialize(&self) -> Vec<u8> { ControlBlock::serialize(self) }
+}
+
+impl Deserialize for ControlBlock {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        Self::decode(bytes).map_err(|_| Error::InvalidControlBlock)
+    }
+}
+
+// Versioned ScriptBuf
+impl Serialize for (ScriptBuf, LeafVersion) {
+    fn serialize(&self) -> Vec<u8> {
+        let mut buf = Vec::with_capacity(self.0.len() + 1);
+        buf.extend(self.0.as_bytes());
+        buf.push(self.1.to_consensus());
+        buf
+    }
+}
+
+impl Deserialize for (ScriptBuf, LeafVersion) {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        if bytes.is_empty() {
+            return Err(io::Error::from(io::ErrorKind::UnexpectedEof).into());
+        }
+        // The last byte is LeafVersion.
+        let script = ScriptBuf::deserialize(&bytes[..bytes.len() - 1])?;
+        let leaf_ver = LeafVersion::from_consensus(bytes[bytes.len() - 1])
+            .map_err(|_| Error::InvalidLeafVersion)?;
+        Ok((script, leaf_ver))
+    }
+}
+
+impl Serialize for (Vec<TapLeafHash>, KeySource) {
+    fn serialize(&self) -> Vec<u8> {
+        let mut buf = Vec::with_capacity(32 * self.0.len() + key_source_len(&self.1));
+        self.0.consensus_encode(&mut buf).expect("Vecs don't error allocation");
+        // TODO: Add support for writing into a writer for key-source
+        buf.extend(self.1.serialize());
+        buf
+    }
+}
+
+impl Deserialize for (Vec<TapLeafHash>, KeySource) {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        let (leafhash_vec, consumed) = deserialize_partial::<Vec<TapLeafHash>>(bytes)?;
+        let key_source = KeySource::deserialize(&bytes[consumed..])?;
+        Ok((leafhash_vec, key_source))
+    }
+}
+
+impl Serialize for TapTree {
+    fn serialize(&self) -> Vec<u8> {
+        let capacity = self
+            .script_leaves()
+            .map(|l| {
+                l.script().len() + VarInt(l.script().len() as u64).len() // script version
+            + 1 // merkle branch
+            + 1 // leaf version
+            })
+            .sum::<usize>();
+        let mut buf = Vec::with_capacity(capacity);
+        for leaf_info in self.script_leaves() {
+            // # Cast Safety:
+            //
+            // TaprootMerkleBranch can only have len atmost 128(TAPROOT_CONTROL_MAX_NODE_COUNT).
+            // safe to cast from usize to u8
+            buf.push(leaf_info.merkle_branch().len() as u8);
+            buf.push(leaf_info.version().to_consensus());
+            leaf_info.script().consensus_encode(&mut buf).expect("Vecs dont err");
+        }
+        buf
+    }
+}
+
+impl Deserialize for TapTree {
+    fn deserialize(bytes: &[u8]) -> Result<Self, Error> {
+        let mut builder = TaprootBuilder::new();
+        let mut bytes_iter = bytes.iter();
+        while let Some(depth) = bytes_iter.next() {
+            let version = bytes_iter.next().ok_or(Error::Taproot("Invalid Taproot Builder"))?;
+            let (script, consumed) = deserialize_partial::<ScriptBuf>(bytes_iter.as_slice())?;
+            if consumed > 0 {
+                bytes_iter.nth(consumed - 1);
+            }
+            let leaf_version =
+                LeafVersion::from_consensus(*version).map_err(|_| Error::InvalidLeafVersion)?;
+            builder = builder
+                .add_leaf_with_ver(*depth, script, leaf_version)
+                .map_err(|_| Error::Taproot("Tree not in DFS order"))?;
+        }
+        TapTree::try_from(builder).map_err(Error::TapTree)
+    }
+}
+
+// Helper function to compute key source len
+fn key_source_len(key_source: &KeySource) -> usize { 4 + 4 * (key_source.1).as_ref().len() }
+
+#[cfg(test)]
+mod tests {
+    use core::convert::TryFrom;
+
+    use super::*;
+
+    // Composes tree matching a given depth map, filled with dumb script leafs,
+    // each of which consists of a single push-int op code, with int value
+    // increased for each consecutive leaf.
+    pub fn compose_taproot_builder<'map>(
+        opcode: u8,
+        depth_map: impl IntoIterator<Item = &'map u8>,
+    ) -> TaprootBuilder {
+        let mut val = opcode;
+        let mut builder = TaprootBuilder::new();
+        for depth in depth_map {
+            let script = ScriptBuf::from_hex(&format!("{:02x}", val)).unwrap();
+            builder = builder.add_leaf(*depth, script).unwrap();
+            let (new_val, _) = val.overflowing_add(1);
+            val = new_val;
+        }
+        builder
+    }
+
+    #[test]
+    fn taptree_hidden() {
+        let mut builder = compose_taproot_builder(0x51, &[2, 2, 2]);
+        builder = builder
+            .add_leaf_with_ver(
+                3,
+                ScriptBuf::from_hex("b9").unwrap(),
+                LeafVersion::from_consensus(0xC2).unwrap(),
+            )
+            .unwrap();
+        builder = builder.add_hidden_node(3, TapNodeHash::all_zeros()).unwrap();
+        assert!(TapTree::try_from(builder).is_err());
+    }
+
+    #[test]
+    fn taptree_roundtrip() {
+        let mut builder = compose_taproot_builder(0x51, &[2, 2, 2, 3]);
+        builder = builder
+            .add_leaf_with_ver(
+                3,
+                ScriptBuf::from_hex("b9").unwrap(),
+                LeafVersion::from_consensus(0xC2).unwrap(),
+            )
+            .unwrap();
+        let tree = TapTree::try_from(builder).unwrap();
+        let tree_prime = TapTree::deserialize(&tree.serialize()).unwrap();
+        assert_eq!(tree, tree_prime);
+    }
+
+    #[test]
+    fn can_deserialize_non_standard_psbt_sighash_type() {
+        let non_standard_sighash = [222u8, 0u8, 0u8, 0u8]; // 32 byte value.
+        let sighash = PsbtSighashType::deserialize(&non_standard_sighash);
+        assert!(sighash.is_ok())
+    }
+
+    #[test]
+    #[should_panic(expected = "InvalidMagic")]
+    fn invalid_vector_1() {
+        let hex_psbt = b"0200000001268171371edff285e937adeea4b37b78000c0566cbb3ad64641713ca42171bf6000000006a473044022070b2245123e6bf474d60c5b50c043d4c691a5d2435f09a34a7662a9dc251790a022001329ca9dacf280bdf30740ec0390422422c81cb45839457aeb76fc12edd95b3012102657d118d3357b8e0f4c2cd46db7b39f6d9c38d9a70abcb9b2de5dc8dbfe4ce31feffffff02d3dff505000000001976a914d0c59903c5bac2868760e90fd521a4665aa7652088ac00e1f5050000000017a9143545e6e33b832c47050f24d3eeb93c9c03948bc787b32e1300";
+        PartiallySignedTransaction::deserialize(hex_psbt).unwrap();
+    }
+}
diff --git a/dash/src/serde_utils.rs b/dash/src/serde_utils.rs
new file mode 100644
index 000000000..d9c3c5924
--- /dev/null
+++ b/dash/src/serde_utils.rs
@@ -0,0 +1,528 @@
+//! Dash serde utilities.
+//!
+//! This module is for special serde serializations.
+//!
+
+pub(crate) struct SerializeBytesAsHex<'a>(pub(crate) &'a [u8]);
+
+impl<'a> serde::Serialize for SerializeBytesAsHex<'a> {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+        where
+            S: serde::Serializer,
+    {
+        use internals::hex::display::DisplayHex;
+
+        serializer.collect_str(&format_args!("{:x}", self.0.as_hex()))
+    }
+}
+
+pub mod btreemap_byte_values {
+    //! Module for serialization of BTreeMaps with hex byte values.
+    #![allow(missing_docs)]
+
+    // NOTE: This module can be exactly copied to use with HashMap.
+
+    use hashes::hex::FromHex;
+    use serde;
+
+    use crate::prelude::*;
+
+    pub fn serialize<S, T>(v: &BTreeMap<T, Vec<u8>>, s: S) -> Result<S::Ok, S::Error>
+        where
+            S: serde::Serializer,
+            T: serde::Serialize + core::hash::Hash + Eq + Ord,
+    {
+        use serde::ser::SerializeMap;
+
+        // Don't do anything special when not human readable.
+        if !s.is_human_readable() {
+            serde::Serialize::serialize(v, s)
+        } else {
+            let mut map = s.serialize_map(Some(v.len()))?;
+            for (key, value) in v.iter() {
+                map.serialize_entry(key, &super::SerializeBytesAsHex(value))?;
+            }
+            map.end()
+        }
+    }
+
+    pub fn deserialize<'de, D, T>(d: D) -> Result<BTreeMap<T, Vec<u8>>, D::Error>
+        where
+            D: serde::Deserializer<'de>,
+            T: serde::Deserialize<'de> + core::hash::Hash + Eq + Ord,
+    {
+        use core::marker::PhantomData;
+
+        struct Visitor<T>(PhantomData<T>);
+        impl<'de, T> serde::de::Visitor<'de> for Visitor<T>
+            where
+                T: serde::Deserialize<'de> + core::hash::Hash + Eq + Ord,
+        {
+            type Value = BTreeMap<T, Vec<u8>>;
+
+            fn expecting(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                write!(f, "a map with hexadecimal values")
+            }
+
+            fn visit_map<A: serde::de::MapAccess<'de>>(
+                self,
+                mut a: A,
+            ) -> Result<Self::Value, A::Error> {
+                let mut ret = BTreeMap::new();
+                while let Some((key, value)) = a.next_entry()? {
+                    ret.insert(key, FromHex::from_hex(value).map_err(serde::de::Error::custom)?);
+                }
+                Ok(ret)
+            }
+        }
+
+        // Don't do anything special when not human readable.
+        if !d.is_human_readable() {
+            serde::Deserialize::deserialize(d)
+        } else {
+            d.deserialize_map(Visitor(PhantomData))
+        }
+    }
+}
+
+pub mod btreemap_as_seq {
+    //! Module for serialization of BTreeMaps as lists of sequences because
+    //! serde_json will not serialize hashmaps with non-string keys be default.
+    #![allow(missing_docs)]
+
+    // NOTE: This module can be exactly copied to use with HashMap.
+
+    use serde;
+
+    use crate::prelude::*;
+
+    pub fn serialize<S, T, U>(v: &BTreeMap<T, U>, s: S) -> Result<S::Ok, S::Error>
+        where
+            S: serde::Serializer,
+            T: serde::Serialize + core::hash::Hash + Eq + Ord,
+            U: serde::Serialize,
+    {
+        use serde::ser::SerializeSeq;
+
+        // Don't do anything special when not human readable.
+        if !s.is_human_readable() {
+            serde::Serialize::serialize(v, s)
+        } else {
+            let mut seq = s.serialize_seq(Some(v.len()))?;
+            for pair in v.iter() {
+                seq.serialize_element(&pair)?;
+            }
+            seq.end()
+        }
+    }
+
+    pub fn deserialize<'de, D, T, U>(d: D) -> Result<BTreeMap<T, U>, D::Error>
+        where
+            D: serde::Deserializer<'de>,
+            T: serde::Deserialize<'de> + core::hash::Hash + Eq + Ord,
+            U: serde::Deserialize<'de>,
+    {
+        use core::marker::PhantomData;
+
+        struct Visitor<T, U>(PhantomData<(T, U)>);
+        impl<'de, T, U> serde::de::Visitor<'de> for Visitor<T, U>
+            where
+                T: serde::Deserialize<'de> + core::hash::Hash + Eq + Ord,
+                U: serde::Deserialize<'de>,
+        {
+            type Value = BTreeMap<T, U>;
+
+            fn expecting(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                write!(f, "a sequence of pairs")
+            }
+
+            fn visit_seq<A: serde::de::SeqAccess<'de>>(
+                self,
+                mut a: A,
+            ) -> Result<Self::Value, A::Error> {
+                let mut ret = BTreeMap::new();
+                while let Some((key, value)) = a.next_element()? {
+                    ret.insert(key, value);
+                }
+                Ok(ret)
+            }
+        }
+
+        // Don't do anything special when not human readable.
+        if !d.is_human_readable() {
+            serde::Deserialize::deserialize(d)
+        } else {
+            d.deserialize_seq(Visitor(PhantomData))
+        }
+    }
+}
+
+pub mod btreemap_as_seq_byte_values {
+    //! Module for serialization of BTreeMaps as lists of sequences because
+    //! serde_json will not serialize hashmaps with non-string keys be default.
+    #![allow(missing_docs)]
+
+    // NOTE: This module can be exactly copied to use with HashMap.
+
+    use serde;
+
+    use crate::prelude::*;
+
+    /// A custom key-value pair type that serialized the bytes as hex.
+    #[derive(Debug, Deserialize)]
+    #[serde(crate = "actual_serde")]
+    struct OwnedPair<T>(
+        T,
+        #[serde(deserialize_with = "crate::serde_utils::hex_bytes::deserialize")] Vec<u8>,
+    );
+
+    /// A custom key-value pair type that serialized the bytes as hex.
+    #[derive(Debug, Serialize)]
+    #[serde(crate = "actual_serde")]
+    struct BorrowedPair<'a, T: 'static>(
+        &'a T,
+        #[serde(serialize_with = "crate::serde_utils::hex_bytes::serialize")] &'a [u8],
+    );
+
+    pub fn serialize<S, T>(v: &BTreeMap<T, Vec<u8>>, s: S) -> Result<S::Ok, S::Error>
+        where
+            S: serde::Serializer,
+            T: serde::Serialize + core::hash::Hash + Eq + Ord + 'static,
+    {
+        use serde::ser::SerializeSeq;
+
+        // Don't do anything special when not human readable.
+        if !s.is_human_readable() {
+            serde::Serialize::serialize(v, s)
+        } else {
+            let mut seq = s.serialize_seq(Some(v.len()))?;
+            for (key, value) in v.iter() {
+                seq.serialize_element(&BorrowedPair(key, value))?;
+            }
+            seq.end()
+        }
+    }
+
+    pub fn deserialize<'de, D, T>(d: D) -> Result<BTreeMap<T, Vec<u8>>, D::Error>
+        where
+            D: serde::Deserializer<'de>,
+            T: serde::Deserialize<'de> + core::hash::Hash + Eq + Ord,
+    {
+        use core::marker::PhantomData;
+
+        struct Visitor<T>(PhantomData<T>);
+        impl<'de, T> serde::de::Visitor<'de> for Visitor<T>
+            where
+                T: serde::Deserialize<'de> + core::hash::Hash + Eq + Ord,
+        {
+            type Value = BTreeMap<T, Vec<u8>>;
+
+            fn expecting(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                write!(f, "a sequence of pairs")
+            }
+
+            fn visit_seq<A: serde::de::SeqAccess<'de>>(
+                self,
+                mut a: A,
+            ) -> Result<Self::Value, A::Error> {
+                let mut ret = BTreeMap::new();
+                while let Option::Some(OwnedPair(key, value)) = a.next_element()? {
+                    ret.insert(key, value);
+                }
+                Ok(ret)
+            }
+        }
+
+        // Don't do anything special when not human readable.
+        if !d.is_human_readable() {
+            serde::Deserialize::deserialize(d)
+        } else {
+            d.deserialize_seq(Visitor(PhantomData))
+        }
+    }
+}
+
+pub mod hex_bytes {
+    //! Module for serialization of byte arrays as hex strings.
+    #![allow(missing_docs)]
+
+    use hashes::hex::FromHex;
+    use serde;
+
+    pub fn serialize<T, S>(bytes: &T, s: S) -> Result<S::Ok, S::Error>
+        where
+            T: serde::Serialize + AsRef<[u8]>,
+            S: serde::Serializer,
+    {
+        // Don't do anything special when not human readable.
+        if !s.is_human_readable() {
+            serde::Serialize::serialize(bytes, s)
+        } else {
+            serde::Serialize::serialize(&super::SerializeBytesAsHex(bytes.as_ref()), s)
+        }
+    }
+
+    pub fn deserialize<'de, D, B>(d: D) -> Result<B, D::Error>
+        where
+            D: serde::Deserializer<'de>,
+            B: serde::Deserialize<'de> + FromHex,
+    {
+        struct Visitor<B>(core::marker::PhantomData<B>);
+
+        impl<'de, B: FromHex> serde::de::Visitor<'de> for Visitor<B> {
+            type Value = B;
+
+            fn expecting(&self, formatter: &mut core::fmt::Formatter) -> core::fmt::Result {
+                formatter.write_str("an ASCII hex string")
+            }
+
+            fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
+                where
+                    E: serde::de::Error,
+            {
+                if let Ok(hex) = core::str::from_utf8(v) {
+                    FromHex::from_hex(hex).map_err(E::custom)
+                } else {
+                    return Err(E::invalid_value(serde::de::Unexpected::Bytes(v), &self));
+                }
+            }
+
+            fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+                where
+                    E: serde::de::Error,
+            {
+                FromHex::from_hex(v).map_err(E::custom)
+            }
+        }
+
+        // Don't do anything special when not human readable.
+        if !d.is_human_readable() {
+            serde::Deserialize::deserialize(d)
+        } else {
+            d.deserialize_str(Visitor(core::marker::PhantomData))
+        }
+    }
+}
+
+macro_rules! serde_string_serialize_impl {
+    ($name:ty, $expecting:literal) => {
+        impl $crate::serde::Serialize for $name {
+            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+            where
+                S: $crate::serde::Serializer,
+            {
+                serializer.collect_str(&self)
+            }
+        }
+    };
+}
+
+macro_rules! serde_string_deserialize_impl {
+    ($name:ty, $expecting:literal) => {
+        impl<'de> $crate::serde::Deserialize<'de> for $name {
+            fn deserialize<D>(deserializer: D) -> Result<$name, D::Error>
+            where
+                D: $crate::serde::de::Deserializer<'de>,
+            {
+                use core::fmt::{self, Formatter};
+
+                struct Visitor;
+                impl<'de> $crate::serde::de::Visitor<'de> for Visitor {
+                    type Value = $name;
+
+                    fn expecting(&self, f: &mut Formatter) -> fmt::Result {
+                        f.write_str($expecting)
+                    }
+
+                    fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+                    where
+                        E: $crate::serde::de::Error,
+                    {
+                        v.parse::<$name>().map_err(E::custom)
+                    }
+                }
+
+                deserializer.deserialize_str(Visitor)
+            }
+        }
+    };
+}
+
+macro_rules! serde_string_impl {
+    ($name:ty, $expecting:literal) => {
+        $crate::serde_utils::serde_string_deserialize_impl!($name, $expecting);
+        $crate::serde_utils::serde_string_serialize_impl!($name, $expecting);
+    };
+}
+pub(crate) use {serde_string_deserialize_impl, serde_string_impl, serde_string_serialize_impl};
+
+/// A combination macro where the human-readable serialization is done like
+/// serde_string_impl and the non-human-readable impl is done as a struct.
+macro_rules! serde_struct_human_string_impl {
+    ($name:ident, $expecting:literal, $($fe:ident),*) => (
+        impl<'de> $crate::serde::Deserialize<'de> for $name {
+            fn deserialize<D>(deserializer: D) -> Result<$name, D::Error>
+            where
+                D: $crate::serde::de::Deserializer<'de>,
+            {
+                if deserializer.is_human_readable() {
+                    use core::fmt::{self, Formatter};
+                    use core::str::FromStr;
+
+                    struct Visitor;
+                    impl<'de> $crate::serde::de::Visitor<'de> for Visitor {
+                        type Value = $name;
+
+                        fn expecting(&self, f: &mut Formatter) -> fmt::Result {
+                            f.write_str($expecting)
+                        }
+
+                        fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+                        where
+                            E: $crate::serde::de::Error,
+                        {
+                            $name::from_str(v).map_err(E::custom)
+                        }
+
+                    }
+
+                    deserializer.deserialize_str(Visitor)
+                } else {
+                    use core::fmt::{self, Formatter};
+                    use $crate::serde::de::IgnoredAny;
+
+                    #[allow(non_camel_case_types)]
+                    enum Enum { Unknown__Field, $($fe),* }
+
+                    struct EnumVisitor;
+                    impl<'de> $crate::serde::de::Visitor<'de> for EnumVisitor {
+                        type Value = Enum;
+
+                        fn expecting(&self, f: &mut Formatter) -> fmt::Result {
+                            f.write_str("a field name")
+                        }
+
+                        fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+                        where
+                            E: $crate::serde::de::Error,
+                        {
+                            match v {
+                                $(
+                                stringify!($fe) => Ok(Enum::$fe)
+                                ),*,
+                                _ => Ok(Enum::Unknown__Field)
+                            }
+                        }
+                    }
+
+                    impl<'de> $crate::serde::Deserialize<'de> for Enum {
+                        fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+                        where
+                            D: $crate::serde::de::Deserializer<'de>,
+                        {
+                            deserializer.deserialize_str(EnumVisitor)
+                        }
+                    }
+
+                    struct Visitor;
+
+                    impl<'de> $crate::serde::de::Visitor<'de> for Visitor {
+                        type Value = $name;
+
+                        fn expecting(&self, f: &mut Formatter) -> fmt::Result {
+                            f.write_str("a struct")
+                        }
+
+                        fn visit_seq<V>(self, mut seq: V) -> Result<Self::Value, V::Error>
+                        where
+                            V: $crate::serde::de::SeqAccess<'de>,
+                        {
+                            use $crate::serde::de::Error;
+
+                            let length = 0;
+                            $(
+                                let $fe = seq.next_element()?.ok_or_else(|| {
+                                    Error::invalid_length(length, &self)
+                                })?;
+                                #[allow(unused_variables)]
+                                let length = length + 1;
+                            )*
+
+                            let ret = $name {
+                                $($fe),*
+                            };
+
+                            Ok(ret)
+                        }
+
+                        fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
+                        where
+                            A: $crate::serde::de::MapAccess<'de>,
+                        {
+                            use $crate::serde::de::Error;
+
+                            $(let mut $fe = None;)*
+
+                            loop {
+                                match map.next_key::<Enum>()? {
+                                    Some(Enum::Unknown__Field) => {
+                                        map.next_value::<IgnoredAny>()?;
+                                    }
+                                    $(
+                                        Some(Enum::$fe) => {
+                                            $fe = Some(map.next_value()?);
+                                        }
+                                    )*
+                                    None => { break; }
+                                }
+                            }
+
+                            $(
+                                let $fe = match $fe {
+                                    Some(x) => x,
+                                    None => return Err(A::Error::missing_field(stringify!($fe))),
+                                };
+                            )*
+
+                            let ret = $name {
+                                $($fe),*
+                            };
+
+                            Ok(ret)
+                        }
+                    }
+                    // end type defs
+
+                    static FIELDS: &'static [&'static str] = &[$(stringify!($fe)),*];
+
+                    deserializer.deserialize_struct(stringify!($name), FIELDS, Visitor)
+                }
+            }
+        }
+
+        impl $crate::serde::Serialize for $name {
+            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+            where
+                S: $crate::serde::Serializer,
+            {
+                if serializer.is_human_readable() {
+                    serializer.collect_str(&self)
+                } else {
+                    use $crate::serde::ser::SerializeStruct;
+
+                    // Only used to get the struct length.
+                    static FIELDS: &'static [&'static str] = &[$(stringify!($fe)),*];
+
+                    let mut st = serializer.serialize_struct(stringify!($name), FIELDS.len())?;
+
+                    $(
+                        st.serialize_field(stringify!($fe), &self.$fe)?;
+                    )*
+
+                    st.end()
+                }
+            }
+        }
+    )
+}
+pub(crate) use serde_struct_human_string_impl;
diff --git a/src/util/misc.rs b/dash/src/sign_message.rs
similarity index 52%
rename from src/util/misc.rs
rename to dash/src/sign_message.rs
index dc801986d..92206d880 100644
--- a/src/util/misc.rs
+++ b/dash/src/sign_message.rs
@@ -15,42 +15,38 @@
 // If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
 //
 
-//! Miscellaneous functions.
+//! Signature
 //!
-//! This module provides various utility functions including secp256k1 signature
-//! recovery when library is used with the `secp-recovery` feature.
+//! This module provides signature related functions including secp256k1 signature recovery when
+//! library is used with the `secp-recovery` feature.
 //!
 
-use prelude::*;
-
 use hashes::{sha256d, Hash, HashEngine};
 
-use blockdata::opcodes;
-use consensus::{encode, Encodable};
-
 #[cfg(feature = "secp-recovery")]
-#[cfg_attr(docsrs, doc(cfg(feature = "secp-recovery")))]
 pub use self::message_signing::{MessageSignature, MessageSignatureError};
+use crate::consensus::{encode, Encodable};
 
 /// The prefix for signed messages using Dash's message signing protocol.
 pub const DASH_SIGNED_MSG_PREFIX: &[u8] = b"\x19DarkCoin Signed Message:\n";
 
 #[cfg(feature = "secp-recovery")]
 mod message_signing {
-    #[cfg(feature = "base64")] use prelude::*;
     use core::fmt;
-    #[cfg(feature = "std")] use std::error;
 
     use hashes::sha256d;
+    use internals::write_err;
     use secp256k1;
-    use secp256k1::ecdsa::{RecoveryId, RecoverableSignature};
+    use secp256k1::ecdsa::{RecoverableSignature, RecoveryId};
 
-    use util::key::PublicKey;
-    use util::address::{Address, AddressType};
+    use crate::address::{Address, AddressType};
+    use crate::crypto::key::PublicKey;
+    #[cfg(feature = "base64")]
+    use crate::prelude::*;
 
     /// An error used for dealing with Bitcoin Signed Messages.
-    #[cfg_attr(docsrs, doc(cfg(feature = "secp-recovery")))]
     #[derive(Debug, PartialEq, Eq)]
+    #[non_exhaustive]
     pub enum MessageSignatureError {
         /// Signature is expected to be 65 bytes.
         InvalidLength,
@@ -66,20 +62,23 @@ mod message_signing {
         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
             match *self {
                 MessageSignatureError::InvalidLength => write!(f, "length not 65 bytes"),
-                MessageSignatureError::InvalidEncoding(ref e) => write!(f, "invalid encoding: {}", e),
+                MessageSignatureError::InvalidEncoding(ref e) =>
+                    write_err!(f, "invalid encoding"; e),
                 MessageSignatureError::InvalidBase64 => write!(f, "invalid base64"),
-                MessageSignatureError::UnsupportedAddressType(ref address_type) => write!(f, "unsupported address type: {}", address_type),
+                MessageSignatureError::UnsupportedAddressType(ref address_type) =>
+                    write!(f, "unsupported address type: {}", address_type),
             }
         }
     }
 
     #[cfg(feature = "std")]
-    #[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-    impl error::Error for MessageSignatureError {
-        fn cause(&self) -> Option<&dyn error::Error> {
-            match *self {
-                MessageSignatureError::InvalidEncoding(ref e) => Some(e),
-                _ => None,
+    impl std::error::Error for MessageSignatureError {
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            use self::MessageSignatureError::*;
+
+            match self {
+                InvalidEncoding(e) => Some(e),
+                InvalidLength | InvalidBase64 | UnsupportedAddressType(_) => None,
             }
         }
     }
@@ -97,7 +96,6 @@ mod message_signing {
     /// `fmt::Display` and `str::FromStr` implementations, the `base64` feature
     /// must be enabled.
     #[derive(Copy, Clone, PartialEq, Eq, Debug)]
-    #[cfg_attr(docsrs, doc(cfg(feature = "secp-recovery")))]
     pub struct MessageSignature {
         /// The inner recoverable signature.
         pub signature: RecoverableSignature,
@@ -108,10 +106,7 @@ mod message_signing {
     impl MessageSignature {
         /// Create a new [MessageSignature].
         pub fn new(signature: RecoverableSignature, compressed: bool) -> MessageSignature {
-            MessageSignature {
-                signature,
-                compressed,
-            }
+            MessageSignature { signature, compressed }
         }
 
         /// Serialize to bytes.
@@ -134,7 +129,9 @@ mod message_signing {
             }
             // We just check this here so we can safely subtract further.
             if bytes[0] < 27 {
-                return Err(MessageSignatureError::InvalidEncoding(secp256k1::Error::InvalidRecoveryId));
+                return Err(MessageSignatureError::InvalidEncoding(
+                    secp256k1::Error::InvalidRecoveryId,
+                ));
             };
             let recid = RecoveryId::from_i32(((bytes[0] - 27) & 0x03) as i32)?;
             Ok(MessageSignature {
@@ -149,15 +146,11 @@ mod message_signing {
         pub fn recover_pubkey<C: secp256k1::Verification>(
             &self,
             secp_ctx: &secp256k1::Secp256k1<C>,
-            msg_hash: sha256d::Hash
+            msg_hash: sha256d::Hash,
         ) -> Result<PublicKey, MessageSignatureError> {
-            let msg = secp256k1::Message::from_slice(&msg_hash[..])
-                .expect("cannot fail");
+            let msg = secp256k1::Message::from(msg_hash);
             let pubkey = secp_ctx.recover_ecdsa(&msg, &self.signature)?;
-            Ok(PublicKey {
-                inner: pubkey,
-                compressed: self.compressed,
-            })
+            Ok(PublicKey { inner: pubkey, compressed: self.compressed })
         }
 
         /// Verify that the signature signs the message and was signed by the given address.
@@ -167,48 +160,46 @@ mod message_signing {
             &self,
             secp_ctx: &secp256k1::Secp256k1<C>,
             address: &Address,
-            msg_hash: sha256d::Hash
+            msg_hash: sha256d::Hash,
         ) -> Result<bool, MessageSignatureError> {
             match address.address_type() {
                 Some(AddressType::P2pkh) => {
                     let pubkey = self.recover_pubkey(secp_ctx, msg_hash)?;
-                    Ok(*address == Address::p2pkh(&pubkey, address.network))
+                    Ok(*address == Address::p2pkh(&pubkey, *address.network()))
                 }
-                Some(address_type) => Err(MessageSignatureError::UnsupportedAddressType(address_type)),
+                Some(address_type) =>
+                    Err(MessageSignatureError::UnsupportedAddressType(address_type)),
                 None => Ok(false),
             }
         }
 
         /// Convert a signature from base64 encoding.
         #[cfg(feature = "base64")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "base64")))]
         pub fn from_base64(s: &str) -> Result<MessageSignature, MessageSignatureError> {
-            let bytes = ::base64::decode(s).map_err(|_| MessageSignatureError::InvalidBase64)?;
+            let bytes = base64::decode(s).map_err(|_| MessageSignatureError::InvalidBase64)?;
             MessageSignature::from_slice(&bytes)
         }
 
         /// Convert to base64 encoding.
         #[cfg(feature = "base64")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "base64")))]
-        pub fn to_base64(&self) -> String {
-            ::base64::encode(&self.serialize()[..])
-        }
+        pub fn to_base64(self) -> String { base64::encode(&self.serialize()[..]) }
     }
 
     #[cfg(feature = "base64")]
-    #[cfg_attr(docsrs, doc(cfg(feature = "base64")))]
     impl fmt::Display for MessageSignature {
         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
             let bytes = self.serialize();
             // This avoids the allocation of a String.
-            write!(f, "{}", ::base64::display::Base64Display::with_config(
-                    &bytes[..], ::base64::STANDARD))
+            write!(
+                f,
+                "{}",
+                base64::display::Base64Display::with_config(&bytes[..], base64::STANDARD)
+            )
         }
     }
 
     #[cfg(feature = "base64")]
-    #[cfg_attr(docsrs, doc(cfg(feature = "base64")))]
-    impl ::core::str::FromStr for MessageSignature {
+    impl core::str::FromStr for MessageSignature {
         type Err = MessageSignatureError;
         fn from_str(s: &str) -> Result<MessageSignature, MessageSignatureError> {
             MessageSignature::from_base64(s)
@@ -216,47 +207,6 @@ mod message_signing {
     }
 }
 
-/// Search for `needle` in the vector `haystack` and remove every
-/// instance of it, returning the number of instances removed.
-/// Loops through the vector opcode by opcode, skipping pushed data.
-pub fn script_find_and_remove(haystack: &mut Vec<u8>, needle: &[u8]) -> usize {
-    if needle.len() > haystack.len() {
-        return 0;
-    }
-    if needle.is_empty() {
-        return 0;
-    }
-
-    let mut top = haystack.len() - needle.len();
-    let mut n_deleted = 0;
-
-    let mut i = 0;
-    while i <= top {
-        if &haystack[i..(i + needle.len())] == needle {
-            for j in i..top {
-                haystack.swap(j + needle.len(), j);
-            }
-            n_deleted += 1;
-            // This is ugly but prevents infinite loop in case of overflow
-            let overflow = top < needle.len();
-            top = top.wrapping_sub(needle.len());
-            if overflow {
-                break;
-            }
-        } else {
-            i += match opcodes::All::from((*haystack)[i]).classify(opcodes::ClassifyContext::Legacy) {
-                opcodes::Class::PushBytes(n) => n as usize + 1,
-                opcodes::Class::Ordinary(opcodes::Ordinary::OP_PUSHDATA1) => 2,
-                opcodes::Class::Ordinary(opcodes::Ordinary::OP_PUSHDATA2) => 3,
-                opcodes::Class::Ordinary(opcodes::Ordinary::OP_PUSHDATA4) => 5,
-                _ => 1
-            };
-        }
-    }
-    haystack.truncate(top.wrapping_add(needle.len()));
-    n_deleted
-}
-
 /// Hash message for signature using Bitcoin's message signing format.
 pub fn signed_msg_hash(msg: &str) -> sha256d::Hash {
     let mut engine = sha256d::Hash::engine();
@@ -270,89 +220,48 @@ pub fn signed_msg_hash(msg: &str) -> sha256d::Hash {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use hashes::hex::ToHex;
-    use super::script_find_and_remove;
-    use super::signed_msg_hash;
-
-    #[test]
-    fn test_script_find_and_remove() {
-        let mut v = vec![101u8, 102, 103, 104, 102, 103, 104, 102, 103, 104, 105, 106, 107, 108, 109];
-
-        assert_eq!(script_find_and_remove(&mut v, &[]), 0);
-        assert_eq!(script_find_and_remove(&mut v, &[105, 105, 105]), 0);
-        assert_eq!(v, vec![101, 102, 103, 104, 102, 103, 104, 102, 103, 104, 105, 106, 107, 108, 109]);
-
-        assert_eq!(script_find_and_remove(&mut v, &[105, 106, 107]), 1);
-        assert_eq!(v, vec![101, 102, 103, 104, 102, 103, 104, 102, 103, 104, 108, 109]);
-
-        assert_eq!(script_find_and_remove(&mut v, &[104, 108, 109]), 1);
-        assert_eq!(v, vec![101, 102, 103, 104, 102, 103, 104, 102, 103]);
-
-        assert_eq!(script_find_and_remove(&mut v, &[101]), 1);
-        assert_eq!(v, vec![102, 103, 104, 102, 103, 104, 102, 103]);
-
-        assert_eq!(script_find_and_remove(&mut v, &[102]), 3);
-        assert_eq!(v, vec![103, 104, 103, 104, 103]);
-
-        assert_eq!(script_find_and_remove(&mut v, &[103, 104]), 2);
-        assert_eq!(v, vec![103]);
-
-        assert_eq!(script_find_and_remove(&mut v, &[105, 105, 5]), 0);
-        assert_eq!(script_find_and_remove(&mut v, &[105]), 0);
-        assert_eq!(script_find_and_remove(&mut v, &[103]), 1);
-        assert_eq!(v, Vec::<u8>::new());
-
-        assert_eq!(script_find_and_remove(&mut v, &[105, 105, 5]), 0);
-        assert_eq!(script_find_and_remove(&mut v, &[105]), 0);
-    }
-
-    #[test]
-    fn test_script_codesep_remove() {
-        let mut s = vec![33u8, 3, 132, 121, 160, 250, 153, 140, 211, 82, 89, 162, 239, 10, 122, 92, 104, 102, 44, 20, 116, 248, 140, 203, 109, 8, 167, 103, 123, 190, 199, 242, 32, 65, 173, 171, 33, 3, 132, 121, 160, 250, 153, 140, 211, 82, 89, 162, 239, 10, 122, 92, 104, 102, 44, 20, 116, 248, 140, 203, 109, 8, 167, 103, 123, 190, 199, 242, 32, 65, 173, 171, 81];
-        assert_eq!(script_find_and_remove(&mut s, &[171]), 2);
-        assert_eq!(s, vec![33, 3, 132, 121, 160, 250, 153, 140, 211, 82, 89, 162, 239, 10, 122, 92, 104, 102, 44, 20, 116, 248, 140, 203, 109, 8, 167, 103, 123, 190, 199, 242, 32, 65, 173, 33, 3, 132, 121, 160, 250, 153, 140, 211, 82, 89, 162, 239, 10, 122, 92, 104, 102, 44, 20, 116, 248, 140, 203, 109, 8, 167, 103, 123, 190, 199, 242, 32, 65, 173, 81]);
-    }
 
     #[test]
     fn test_signed_msg_hash() {
         let hash = signed_msg_hash("test");
-        assert_eq!(hash.to_hex(), "9534c129a0eec7aaec6b6145d5014c2867d573f23a9827089ff09d5c357597dc");
+        assert_eq!(
+            hash.to_string(),
+            "9534c129a0eec7aaec6b6145d5014c2867d573f23a9827089ff09d5c357597dc"
+        );
     }
 
     #[test]
-    #[cfg(all(feature = "secp-recovery", feature = "base64"))]
+    #[cfg(all(feature = "secp-recovery", feature = "base64", feature = "rand-std"))]
     fn test_message_signature() {
         use core::str::FromStr;
+
         use secp256k1;
-        use ::AddressType;
 
-        let secp = secp256k1::Secp256k1::new();
-        let message = "rust-dashcore MessageSignature test";
-        let msg_hash = super::signed_msg_hash(&message);
-        let msg = secp256k1::Message::from_slice(&msg_hash).expect("message");
+        use crate::{Address, AddressType, Network};
 
+        let secp = secp256k1::Secp256k1::new();
+        let message = "rust-dash MessageSignature test";
+        let msg_hash = super::signed_msg_hash(message);
+        let msg = secp256k1::Message::from(msg_hash);
 
         let privkey = secp256k1::SecretKey::new(&mut secp256k1::rand::thread_rng());
         let secp_sig = secp.sign_ecdsa_recoverable(&msg, &privkey);
-        let signature = super::MessageSignature {
-            signature: secp_sig,
-            compressed: true,
-        };
+        let signature = super::MessageSignature { signature: secp_sig, compressed: true };
 
         assert_eq!(signature.to_base64(), signature.to_string());
         let signature2 = super::MessageSignature::from_str(&signature.to_string()).unwrap();
         let pubkey = signature2.recover_pubkey(&secp, msg_hash).unwrap();
-        assert_eq!(pubkey.compressed, true);
+        assert!(pubkey.compressed);
         assert_eq!(pubkey.inner, secp256k1::PublicKey::from_secret_key(&secp, &privkey));
 
-        let p2pkh = ::Address::p2pkh(&pubkey, ::Network::Dash);
+        let p2pkh = Address::p2pkh(&pubkey, Network::Dash);
         assert_eq!(signature2.is_signed_by_address(&secp, &p2pkh, msg_hash), Ok(true));
-        let p2wpkh = ::Address::p2wpkh(&pubkey, ::Network::Dash).unwrap();
+        let p2wpkh = Address::p2wpkh(&pubkey, Network::Dash).unwrap();
         assert_eq!(
             signature2.is_signed_by_address(&secp, &p2wpkh, msg_hash),
             Err(MessageSignatureError::UnsupportedAddressType(AddressType::P2wpkh))
         );
-        let p2shwpkh = ::Address::p2shwpkh(&pubkey, ::Network::Dash).unwrap();
+        let p2shwpkh = Address::p2shwpkh(&pubkey, Network::Dash).unwrap();
         assert_eq!(
             signature2.is_signed_by_address(&secp, &p2shwpkh, msg_hash),
             Err(MessageSignatureError::UnsupportedAddressType(AddressType::P2sh))
@@ -363,23 +272,25 @@ mod tests {
     #[cfg(all(feature = "secp-recovery", feature = "base64"))]
     fn test_incorrect_message_signature() {
         use secp256k1;
-        use util::key::PublicKey;
+
+        use crate::crypto::key::PublicKey;
+        use crate::{Address, Network};
 
         let secp = secp256k1::Secp256k1::new();
         let message = "a different message from what was signed";
-        let msg_hash = super::signed_msg_hash(&message);
+        let msg_hash = super::signed_msg_hash(message);
 
-        // Signature of msg = "rust-bitcoin MessageSignature test"
+        // Signature of msg = "rust-dashcore MessageSignature test"
         // Signed with pk "UuOGDsfLPr4HIMKQX0ipjJeRaj1geCq3yPUF2COP5ME="
         let signature_base64 = "IAM2qX24tYx/bdBTIgVLhD8QEAjrPlJpmjB4nZHdRYGIBa4DmVulAcwjPnWe6Q5iEwXH6F0pUCJP/ZeHPWS1h1o=";
         let pubkey_base64 = "A1FTfMEntPpAty3qkEo0q2Dc1FEycI10a3jmwEFy+Qr6";
-        let signature = super::MessageSignature::from_base64(signature_base64).expect("message signature");
+        let signature =
+            super::MessageSignature::from_base64(signature_base64).expect("message signature");
 
-        let pubkey = PublicKey::from_slice(
-            &::base64::decode(&pubkey_base64).expect("base64 string")
-        ).expect("pubkey slice");
+        let pubkey = PublicKey::from_slice(&base64::decode(pubkey_base64).expect("base64 string"))
+            .expect("pubkey slice");
 
-        let p2pkh = ::Address::p2pkh(&pubkey, ::Network::Dash);
+        let p2pkh = Address::p2pkh(&pubkey, Network::Dash);
         assert_eq!(signature.is_signed_by_address(&secp, &p2pkh, msg_hash), Ok(false));
     }
 }
diff --git a/src/util/signer.rs b/dash/src/signer.rs
similarity index 88%
rename from src/util/signer.rs
rename to dash/src/signer.rs
index 56c0ccaa6..fd858af92 100644
--- a/src/util/signer.rs
+++ b/dash/src/signer.rs
@@ -1,13 +1,13 @@
 //! Module contains helper functions for signing and verification the ECDSA signatures
 
 use anyhow::{bail, anyhow};
-use hashes::{Hash, sha256, ripemd160};
-use prelude::Vec;
+use hashes::{Hash, ripemd160, sha256d};
+use crate::prelude::Vec;
 use core::{convert::TryInto};
 
 use crate::{
     secp256k1::{
-		Secp256k1, SecretKey,
+        Secp256k1, SecretKey,
         ecdsa::{RecoverableSignature, RecoveryId},
         Message,
     },
@@ -86,8 +86,8 @@ pub fn sign_hash(data_hash: &[u8], private_key: &[u8]) -> Result<[u8; 65], anyho
 /// converts the signature from/to compact format. Compact format is when the signature
 /// is prefixed by the recovery byte
 pub trait CompactSignature
-where
-    Self: Sized,
+    where
+        Self: Sized,
 {
     /// Converts the Signature with Recovery byte to the compact format where
     /// the first byte of signature is occupied by the recovery byte
@@ -116,7 +116,7 @@ impl CompactSignature for RecoverableSignature {
             &signature.as_ref()[1..],
             RecoveryId::from_i32(i).unwrap(),
         )
-        .map_err(anyhow::Error::msg)
+            .map_err(anyhow::Error::msg)
     }
 
     fn to_compact_signature(&self, is_compressed: bool) -> [u8; 65] {
@@ -133,13 +133,13 @@ impl CompactSignature for RecoverableSignature {
 
 
 /// calculates double sha256 on data
-pub fn double_sha(payload : impl AsRef<[u8]>) -> Vec<u8>  {
-    sha256::Hash::hash(&sha256::Hash::hash(payload.as_ref())).to_vec()
+pub fn double_sha(payload: impl AsRef<[u8]>) -> Vec<u8> {
+    sha256d::Hash::hash(payload.as_ref()).as_byte_array().to_vec()
 }
 
 /// calculates the RIPEMD169(SHA256(data))
-pub fn ripemd160_sha256(data : &[u8]) -> Vec<u8> {
-    ripemd160::Hash::hash(&sha256::Hash::hash(data)).to_vec()
+pub fn ripemd160_sha256(data: &[u8]) -> Vec<u8> {
+    ripemd160::Hash::hash(data.as_ref()).as_byte_array().to_vec()
 }
 
 #[cfg(test)]
@@ -148,6 +148,8 @@ mod test {
 
     use super::*;
     use crate::{psbt::serialize::Serialize, PublicKey};
+    use crate::internal_macros::hex;
+
     struct Keys {
         private_key: Vec<u8>,
         public_key_uncompressed: Vec<u8>,
@@ -158,8 +160,8 @@ mod test {
         let private_key_string = "032f352abd3fb62c3c5b543bb6eae515a1b99a202b367ab9c6e155ba689d0ff4";
         let public_key_compressed =
             "02716899be7008396a0b34dd49d9707b01e86265f9556ab54a493e712d42946e7a";
-        let private_key_bytes = hex::decode(private_key_string).unwrap();
-        let public_key_compressed_bytes = hex::decode(public_key_compressed).unwrap();
+        let private_key_bytes = hex!(private_key_string);
+        let public_key_compressed_bytes = hex!(public_key_compressed);
 
         let mut public_key = PublicKey::from_slice(&public_key_compressed_bytes).unwrap();
         public_key.compressed = false;
@@ -175,7 +177,7 @@ mod test {
     #[test]
     fn sign_and_verify_data() {
         let k = get_keys();
-        let data = hex::decode("fafafa").unwrap();
+        let data = hex!("fafafa");
 
         let signature = sign(&data, &k.private_key).unwrap();
 
@@ -186,8 +188,8 @@ mod test {
     #[test]
     fn invalid_signature_for_different_data() {
         let k = get_keys();
-        let data = hex::decode("fafafafa").unwrap();
-        let incorrect_data = hex::decode("fefefe").unwrap();
+        let data = hex!("fafafafa");
+        let incorrect_data = hex!("fefefe");
 
         let signature = sign(&data, &k.private_key).expect("singing shouldn't fail");
         let verification_result =
@@ -201,7 +203,7 @@ mod test {
         let mut rng = crate::secp256k1::rand::thread_rng();
         let secp = Secp256k1::new();
         let (_, different_public_key) = secp.generate_keypair(&mut rng);
-        let data = hex::decode("fafafa").unwrap();
+        let data = hex!("fafafa");
 
         let signature = sign(&data, &k.private_key).expect("signing shouldn't fail");
         let verification_result =
@@ -213,7 +215,7 @@ mod test {
     #[test]
     fn should_verify_against_signature_with_uncompressed_pk() {
         let k = get_keys();
-        let data = hex::decode("fafafa").unwrap();
+        let data = hex!("fafafa");
 
         let signature = sign(&data, &k.private_key).expect("signing shouldn't fail");
         verify_data_signature(&data, &signature, &k.public_key_uncompressed)
@@ -223,11 +225,11 @@ mod test {
     #[test]
     fn should_validate_the_hash_signature() {
         let k = get_keys();
-        let data = hex::decode("fafafa").unwrap();
+        let data = hex!("fafafa");
         let signature = sign(&data, &k.private_key).expect("signing shouldn't fail");
 
         let data_hash = double_sha(data);
-        verify_hash_signature(&data_hash, &signature,  &ripemd160_sha256(&k.public_key_compressed))
+        verify_hash_signature(&data_hash, &signature, &ripemd160_sha256(&k.public_key_compressed))
             .expect("verification shouldn't fail for compressed public key");
 
         // verify_hash_signature(&data_hash, &signature, &k.public_key_uncompressed)
@@ -237,11 +239,11 @@ mod test {
     #[test]
     fn should_fail_validation_with_hash_coming_from_uncompressed_public_key() {
         let k = get_keys();
-        let data = hex::decode("fafafa").unwrap();
+        let data = hex!("fafafa");
         let signature = sign(&data, &k.private_key).expect("signing shouldn't fail");
 
         let data_hash = double_sha(data);
-        let validation_result = verify_hash_signature(&data_hash, &signature,  &ripemd160_sha256(&k.public_key_uncompressed));
+        let validation_result = verify_hash_signature(&data_hash, &signature, &ripemd160_sha256(&k.public_key_uncompressed));
 
         assert_error_contains!(validation_result, "the signature isn't valid")
     }
@@ -252,7 +254,7 @@ mod test {
         let mut rng = crate::secp256k1::rand::thread_rng();
         let secp = Secp256k1::new();
         let (_, different_public_key) = secp.generate_keypair(&mut rng);
-        let data = hex::decode("fafafa").unwrap();
+        let data = hex!("fafafa");
         let signature = sign(&data, &k.private_key).expect("signing shouldn't fail");
 
         let data_hash = double_sha(data);
@@ -267,7 +269,7 @@ mod test {
     fn should_fail_with_non_recoverable_signature() {
         let k = get_keys();
         let secp = Secp256k1::new();
-        let data = hex::decode("fafafa").unwrap();
+        let data = hex!("fafafa");
         let data_hash = double_sha(&data);
         let secret_key = SecretKey::from_slice(&k.private_key).unwrap();
 
diff --git a/dash/src/string.rs b/dash/src/string.rs
new file mode 100644
index 000000000..e9fb26d35
--- /dev/null
+++ b/dash/src/string.rs
@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: CC0-1.0
+
+//! Bitcoin string parsing utilities.
+//!
+//! This module provides utility types and traits
+//! to support handling and parsing strings within `rust-dash`.
+
+use core::fmt;
+
+use internals::write_err;
+
+use crate::prelude::String;
+
+/// Trait that allows types to be initialized from hex strings
+pub trait FromHexStr: Sized {
+    /// An error occurred while parsing the hex string.
+    type Error;
+
+    /// Parses provided string as hex requiring 0x prefix.
+    ///
+    /// This is intended for user-supplied inputs or already-existing protocols in which 0x prefix is used.
+    fn from_hex_str<S: AsRef<str> + Into<String>>(s: S) -> Result<Self, FromHexError<Self::Error>> {
+        if !s.as_ref().starts_with("0x") {
+            Err(FromHexError::MissingPrefix(s.into()))
+        } else {
+            Ok(Self::from_hex_str_no_prefix(s.as_ref().trim_start_matches("0x"))?)
+        }
+    }
+
+    /// Parses provided string as hex without requiring 0x prefix.
+    ///
+    /// This is **not** recommended for user-supplied inputs because of possible confusion with decimals.
+    /// It should be only used for existing protocols which always encode values as hex without 0x prefix.
+    fn from_hex_str_no_prefix<S: AsRef<str> + Into<String>>(s: S) -> Result<Self, Self::Error>;
+}
+
+/// Hex parsing error
+#[derive(Debug, Eq, PartialEq, Clone)]
+pub enum FromHexError<E> {
+    /// The input was not a valid hex string, contains the error that occurred while parsing.
+    ParseHex(E),
+    /// The input is missing `0x` prefix, contains the invalid input.
+    MissingPrefix(String),
+}
+
+impl<E> From<E> for FromHexError<E> {
+    fn from(e: E) -> Self { FromHexError::ParseHex(e) }
+}
+
+impl<E: fmt::Display> fmt::Display for FromHexError<E> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use self::FromHexError::*;
+
+        match *self {
+            ParseHex(ref e) => write_err!(f, "failed to parse hex string"; e),
+            MissingPrefix(ref value) =>
+                write_err!(f, "the input value `{}` is missing the `0x` prefix", value; self),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl<E> std::error::Error for FromHexError<E>
+where
+    E: std::error::Error + 'static,
+{
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::FromHexError::*;
+
+        match *self {
+            ParseHex(ref e) => Some(e),
+            MissingPrefix(_) => None,
+        }
+    }
+}
diff --git a/src/util/taproot.rs b/dash/src/taproot.rs
similarity index 54%
rename from src/util/taproot.rs
rename to dash/src/taproot.rs
index d3a0b3b01..6344957ac 100644
--- a/src/util/taproot.rs
+++ b/dash/src/taproot.rs
@@ -1,115 +1,65 @@
-// Rust Dash Library
-// Written in 2019 by
-//     The rust-bitcoin developers.
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
+// SPDX-License-Identifier: CC0-1.0
 
 //! Bitcoin Taproot.
 //!
 //! This module provides support for taproot tagged hashes.
 //!
 
-use prelude::*;
-use io;
-use secp256k1::{self, Secp256k1, Scalar};
-
-use core::fmt;
 use core::cmp::Reverse;
-#[cfg(feature = "std")]
-use std::error;
-
-use hashes::{sha256, sha256t, Hash, HashEngine};
-use schnorr::{TweakedPublicKey, UntweakedPublicKey, TapTweak};
-use util::key::XOnlyPublicKey;
-use Script;
-
-use consensus::Encodable;
-
-/// The SHA-256 midstate value for the TapLeaf hash.
-const MIDSTATE_TAPLEAF: [u8; 32] = [
-    156, 224, 228, 230, 124, 17, 108, 57, 56, 179, 202, 242, 195, 15, 80, 137, 211, 243, 147, 108,
-    71, 99, 110, 96, 125, 179, 62, 234, 221, 198, 240, 201,
-];
-// 9ce0e4e67c116c3938b3caf2c30f5089d3f3936c47636e607db33eeaddc6f0c9
-
-/// The SHA-256 midstate value for the TapBranch hash.
-const MIDSTATE_TAPBRANCH: [u8; 32] = [
-    35, 168, 101, 169, 184, 164, 13, 167, 151, 124, 30, 4, 196, 158, 36, 111, 181, 190, 19, 118,
-    157, 36, 201, 183, 181, 131, 181, 212, 168, 210, 38, 210,
-];
-// 23a865a9b8a40da7977c1e04c49e246fb5be13769d24c9b7b583b5d4a8d226d2
-
-/// The SHA-256 midstate value for the TapTweak hash.
-const MIDSTATE_TAPTWEAK: [u8; 32] = [
-    209, 41, 162, 243, 112, 28, 101, 93, 101, 131, 182, 195, 185, 65, 151, 39, 149, 244, 226, 50,
-    148, 253, 84, 244, 162, 174, 141, 133, 71, 202, 89, 11,
-];
-// d129a2f3701c655d6583b6c3b941972795f4e23294fd54f4a2ae8d8547ca590b
-
-/// The SHA-256 midstate value for the [`TapSighashHash`].
-const MIDSTATE_TAPSIGHASH: [u8; 32] = [
-    245, 4, 164, 37, 215, 248, 120, 59, 19, 99, 134, 138, 227, 229, 86, 88, 110, 238, 148, 93, 188,
-    120, 136, 221, 2, 166, 226, 195, 24, 115, 254, 159,
-];
-// f504a425d7f8783b1363868ae3e556586eee945dbc7888dd02a6e2c31873fe9f
-
-/// Internal macro to speficy the different taproot tagged hashes.
-macro_rules! sha256t_hash_newtype {
-    ($newtype:ident, $tag:ident, $midstate:ident, $midstate_len:expr, $docs:meta, $reverse: expr) => {
-        sha256t_hash_newtype!($newtype, $tag, $midstate, $midstate_len, $docs, $reverse, stringify!($newtype));
-    };
+use core::convert::TryFrom;
+use core::fmt;
+use core::iter::FusedIterator;
 
-    ($newtype:ident, $tag:ident, $midstate:ident, $midstate_len:expr, $docs:meta, $reverse: expr, $sname:expr) => {
-        #[doc = "The tag used for ["]
-        #[doc = $sname]
-        #[doc = "]"]
-        #[derive(Copy, Clone, PartialEq, Eq, Default, PartialOrd, Ord, Hash)]
-        pub struct $tag;
-
-        impl sha256t::Tag for $tag {
-            fn engine() -> sha256::HashEngine {
-                let midstate = sha256::Midstate::from_inner($midstate);
-                sha256::HashEngine::from_midstate(midstate, $midstate_len)
-            }
-        }
+use hashes::{sha256t_hash_newtype, Hash, HashEngine};
+use internals::write_err;
+use secp256k1::{self, Scalar, Secp256k1};
 
-        hash_newtype!($newtype, sha256t::Hash<$tag>, 32, $docs, $reverse);
-    };
-}
+use crate::consensus::Encodable;
+use crate::crypto::key::{TapTweak, TweakedPublicKey, UntweakedPublicKey, XOnlyPublicKey};
+// Re-export these so downstream only has to use one `taproot` module.
+pub use crate::crypto::taproot::{Error, Signature};
+use crate::prelude::*;
+use crate::{io, Script, ScriptBuf};
 
 // Taproot test vectors from BIP-341 state the hashes without any reversing
-sha256t_hash_newtype!(TapLeafHash, TapLeafTag, MIDSTATE_TAPLEAF, 64,
-    doc="Taproot-tagged hash for tapscript Merkle tree leafs", false
-);
-sha256t_hash_newtype!(TapBranchHash, TapBranchTag, MIDSTATE_TAPBRANCH, 64,
-    doc="Taproot-tagged hash for tapscript Merkle tree branches", false
-);
-sha256t_hash_newtype!(TapTweakHash, TapTweakTag, MIDSTATE_TAPTWEAK, 64,
-    doc="Taproot-tagged hash for public key tweaks", false
-);
-sha256t_hash_newtype!(TapSighashHash, TapSighashTag, MIDSTATE_TAPSIGHASH, 64,
-    doc="Taproot-tagged hash for the taproot signature hash", false
-);
+sha256t_hash_newtype! {
+    pub struct TapLeafTag = hash_str("TapLeaf");
+
+    /// Taproot-tagged hash with tag \"TapLeaf\".
+    ///
+    /// This is used for computing tapscript script spend hash.
+    #[hash_newtype(forward)]
+    pub struct TapLeafHash(_);
+
+    pub struct TapBranchTag = hash_str("TapBranch");
+
+    /// Tagged hash used in taproot trees.
+    ///
+    /// See BIP-340 for tagging rules.
+    #[hash_newtype(forward)]
+    pub struct TapNodeHash(_);
+
+    pub struct TapTweakTag = hash_str("TapTweak");
+
+    /// Taproot-tagged hash with tag \"TapTweak\".
+    ///
+    /// This hash type is used while computing the tweaked public key.
+    #[hash_newtype(forward)]
+    pub struct TapTweakHash(_);
+}
 
 impl TapTweakHash {
     /// Creates a new BIP341 [`TapTweakHash`] from key and tweak. Produces `H_taptweak(P||R)` where
     /// `P` is the internal key and `R` is the merkle root.
     pub fn from_key_and_tweak(
         internal_key: UntweakedPublicKey,
-        merkle_root: Option<TapBranchHash>,
+        merkle_root: Option<TapNodeHash>,
     ) -> TapTweakHash {
         let mut eng = TapTweakHash::engine();
         // always hash the key
         eng.input(&internal_key.serialize());
         if let Some(h) = merkle_root {
-            eng.input(&h);
+            eng.input(h.as_ref());
         } else {
             // nothing to hash
         }
@@ -117,9 +67,9 @@ impl TapTweakHash {
     }
 
     /// Converts a `TapTweakHash` into a `Scalar` ready for use with key tweaking API.
-    pub fn to_scalar(&self) -> Scalar {
+    pub fn to_scalar(self) -> Scalar {
         // This is statistically extremely unlikely to panic.
-        Scalar::from_be_bytes(self.into_inner()).expect("hash value greater than curve order")
+        Scalar::from_be_bytes(self.to_byte_array()).expect("hash value greater than curve order")
     }
 }
 
@@ -127,31 +77,57 @@ impl TapLeafHash {
     /// Computes the leaf hash from components.
     pub fn from_script(script: &Script, ver: LeafVersion) -> TapLeafHash {
         let mut eng = TapLeafHash::engine();
-        ver.to_consensus()
-            .consensus_encode(&mut eng)
-            .expect("engines don't error");
-        script
-            .consensus_encode(&mut eng)
-            .expect("engines don't error");
+        ver.to_consensus().consensus_encode(&mut eng).expect("engines don't error");
+        script.consensus_encode(&mut eng).expect("engines don't error");
         TapLeafHash::from_engine(eng)
     }
 }
 
-impl TapBranchHash {
+impl From<LeafNode> for TapNodeHash {
+    fn from(leaf: LeafNode) -> TapNodeHash { leaf.node_hash() }
+}
+
+impl From<&LeafNode> for TapNodeHash {
+    fn from(leaf: &LeafNode) -> TapNodeHash { leaf.node_hash() }
+}
+
+impl TapNodeHash {
     /// Computes branch hash given two hashes of the nodes underneath it.
-    pub fn from_node_hashes(a: sha256::Hash, b: sha256::Hash) -> TapBranchHash {
-        let mut eng = TapBranchHash::engine();
+    pub fn from_node_hashes(a: TapNodeHash, b: TapNodeHash) -> TapNodeHash {
+        Self::combine_node_hashes(a, b).0
+    }
+
+    /// Computes branch hash given two hashes of the nodes underneath it and returns
+    /// whether the left node was the one hashed first.
+    fn combine_node_hashes(a: TapNodeHash, b: TapNodeHash) -> (TapNodeHash, bool) {
+        let mut eng = TapNodeHash::engine();
         if a < b {
-            eng.input(&a);
-            eng.input(&b);
+            eng.input(a.as_ref());
+            eng.input(b.as_ref());
         } else {
-            eng.input(&b);
-            eng.input(&a);
+            eng.input(b.as_ref());
+            eng.input(a.as_ref());
         };
-        TapBranchHash::from_engine(eng)
+        (TapNodeHash::from_engine(eng), a < b)
+    }
+
+    /// Assumes the given 32 byte array as hidden [`TapNodeHash`].
+    ///
+    /// Similar to [`TapLeafHash::from_byte_array`], but explicitly conveys that the
+    /// hash is constructed from a hidden node. This also has better ergonomics
+    /// because it does not require the caller to import the Hash trait.
+    pub fn assume_hidden(hash: [u8; 32]) -> TapNodeHash { TapNodeHash::from_byte_array(hash) }
+
+    /// Computes the [`TapNodeHash`] from a script and a leaf version.
+    pub fn from_script(script: &Script, ver: LeafVersion) -> TapNodeHash {
+        TapNodeHash::from(TapLeafHash::from_script(script, ver))
     }
 }
 
+impl From<TapLeafHash> for TapNodeHash {
+    fn from(leaf: TapLeafHash) -> TapNodeHash { TapNodeHash::from_byte_array(leaf.to_byte_array()) }
+}
+
 /// Maximum depth of a taproot tree script spend path.
 // https://github.com/bitcoin/bitcoin/blob/e826b22da252e0599c61d21c98ff89f366b3120f/src/script/interpreter.h#L229
 pub const TAPROOT_CONTROL_MAX_NODE_COUNT: usize = 128;
@@ -175,7 +151,7 @@ pub const TAPROOT_CONTROL_MAX_SIZE: usize =
     TAPROOT_CONTROL_BASE_SIZE + TAPROOT_CONTROL_NODE_SIZE * TAPROOT_CONTROL_MAX_NODE_COUNT;
 
 // type alias for versioned tap script corresponding merkle proof
-type ScriptMerkleProofMap = BTreeMap<(Script, LeafVersion), BTreeSet<TaprootMerkleBranch>>;
+type ScriptMerkleProofMap = BTreeMap<(ScriptBuf, LeafVersion), BTreeSet<TaprootMerkleBranch>>;
 
 /// Represents taproot spending information.
 ///
@@ -197,12 +173,11 @@ type ScriptMerkleProofMap = BTreeMap<(Script, LeafVersion), BTreeSet<TaprootMerk
 /// Note: This library currently does not support
 /// [annex](https://github.com/bitcoin/bips/blob/master/bip-0341.mediawiki#cite_note-5).
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct TaprootSpendInfo {
     /// The BIP341 internal key.
     internal_key: UntweakedPublicKey,
     /// The merkle root of the script tree (None if there are no scripts).
-    merkle_root: Option<TapBranchHash>,
+    merkle_root: Option<TapNodeHash>,
     /// The sign final output pubkey as per BIP 341.
     output_key_parity: secp256k1::Parity,
     /// The tweaked output key.
@@ -224,11 +199,12 @@ impl TaprootSpendInfo {
         internal_key: UntweakedPublicKey,
         script_weights: I,
     ) -> Result<Self, TaprootBuilderError>
-    where
-        I: IntoIterator<Item=(u32, Script)>,
-        C: secp256k1::Verification,
+        where
+            I: IntoIterator<Item=(u32, ScriptBuf)>,
+            C: secp256k1::Verification,
     {
-        TaprootBuilder::with_huffman_tree(script_weights)?.finalize(secp, internal_key)
+        let builder = TaprootBuilder::with_huffman_tree(script_weights)?;
+        Ok(builder.finalize(secp, internal_key).expect("Huffman Tree is always complete"))
     }
 
     /// Creates a new key spend with `internal_key` and `merkle_root`. Provide [`None`] for
@@ -245,14 +221,14 @@ impl TaprootSpendInfo {
     pub fn new_key_spend<C: secp256k1::Verification>(
         secp: &Secp256k1<C>,
         internal_key: UntweakedPublicKey,
-        merkle_root: Option<TapBranchHash>,
+        merkle_root: Option<TapNodeHash>,
     ) -> Self {
         let (output_key, parity) = internal_key.tap_tweak(secp, merkle_root);
         Self {
-            internal_key: internal_key,
-            merkle_root: merkle_root,
+            internal_key,
+            merkle_root,
             output_key_parity: parity,
-            output_key: output_key,
+            output_key,
             script_map: BTreeMap::new(),
         }
     }
@@ -264,24 +240,16 @@ impl TaprootSpendInfo {
     }
 
     /// Returns the internal key for this [`TaprootSpendInfo`].
-    pub fn internal_key(&self) -> UntweakedPublicKey {
-        self.internal_key
-    }
+    pub fn internal_key(&self) -> UntweakedPublicKey { self.internal_key }
 
     /// Returns the merkle root for this [`TaprootSpendInfo`].
-    pub fn merkle_root(&self) -> Option<TapBranchHash> {
-        self.merkle_root
-    }
+    pub fn merkle_root(&self) -> Option<TapNodeHash> { self.merkle_root }
 
     /// Returns the output key (the key used in script pubkey) for this [`TaprootSpendInfo`].
-    pub fn output_key(&self) -> TweakedPublicKey {
-        self.output_key
-    }
+    pub fn output_key(&self) -> TweakedPublicKey { self.output_key }
 
     /// Returns the parity of the output key. See also [`TaprootSpendInfo::output_key`].
-    pub fn output_key_parity(&self) -> secp256k1::Parity {
-        self.output_key_parity
-    }
+    pub fn output_key_parity(&self) -> secp256k1::Parity { self.output_key_parity }
 
     /// Computes the [`TaprootSpendInfo`] from `internal_key` and `node`.
     ///
@@ -293,29 +261,35 @@ impl TaprootSpendInfo {
         node: NodeInfo,
     ) -> TaprootSpendInfo {
         // Create as if it is a key spend path with the given merkle root
-        let root_hash = Some(TapBranchHash::from_inner(node.hash.into_inner()));
+        let root_hash = Some(node.hash);
         let mut info = TaprootSpendInfo::new_key_spend(secp, internal_key, root_hash);
+
         for leaves in node.leaves {
-            let key = (leaves.script, leaves.ver);
-            let value = leaves.merkle_branch;
-            match info.script_map.get_mut(&key) {
-                Some(set) => {
-                    set.insert(value);
-                    continue; // NLL fix
+            match leaves.leaf {
+                TapLeaf::Hidden(_) => {
+                    // We don't store any information about hidden nodes in TaprootSpendInfo.
+                }
+                TapLeaf::Script(script, ver) => {
+                    let key = (script, ver);
+                    let value = leaves.merkle_branch;
+                    match info.script_map.get_mut(&key) {
+                        None => {
+                            let mut set = BTreeSet::new();
+                            set.insert(value);
+                            info.script_map.insert(key, set);
+                        }
+                        Some(set) => {
+                            set.insert(value);
+                        }
+                    }
                 }
-                None => {}
             }
-            let mut set = BTreeSet::new();
-            set.insert(value);
-            info.script_map.insert(key, set);
         }
         info
     }
 
     /// Returns the internal script map.
-    pub fn as_script_map(&self) -> &ScriptMerkleProofMap {
-        &self.script_map
-    }
+    pub fn as_script_map(&self) -> &ScriptMerkleProofMap { &self.script_map }
 
     /// Constructs a [`ControlBlock`] for particular script with the given version.
     ///
@@ -323,13 +297,13 @@ impl TaprootSpendInfo {
     ///
     /// - If there are multiple control blocks possible, returns the shortest one.
     /// - If the script is not contained in the [`TaprootSpendInfo`], returns `None`.
-    pub fn control_block(&self, script_ver: &(Script, LeafVersion)) -> Option<ControlBlock> {
+    pub fn control_block(&self, script_ver: &(ScriptBuf, LeafVersion)) -> Option<ControlBlock> {
         let merkle_branch_set = self.script_map.get(script_ver)?;
         // Choose the smallest one amongst the multiple script maps
         let smallest = merkle_branch_set
             .iter()
             .min_by(|x, y| x.0.len().cmp(&y.0.len()))
-            .expect("Invariant: Script map key must contain non-empty set value");
+            .expect("Invariant: ScriptBuf map key must contain non-empty set value");
         Some(ControlBlock {
             internal_key: self.internal_key,
             output_key_parity: self.output_key_parity,
@@ -339,15 +313,22 @@ impl TaprootSpendInfo {
     }
 }
 
+impl From<TaprootSpendInfo> for TapTweakHash {
+    fn from(spend_info: TaprootSpendInfo) -> TapTweakHash { spend_info.tap_tweak() }
+}
+
+impl From<&TaprootSpendInfo> for TapTweakHash {
+    fn from(spend_info: &TaprootSpendInfo) -> TapTweakHash { spend_info.tap_tweak() }
+}
+
 /// Builder for building taproot iteratively. Users can specify tap leaf or omitted/hidden branches
 /// in a depth-first search (DFS) walk order to construct this tree.
 ///
 /// See Wikipedia for more details on [DFS](https://en.wikipedia.org/wiki/Depth-first_search).
-// Similar to Taproot Builder in bitcoin core.
+// Similar to Taproot Builder in Bitcoin Core.
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct TaprootBuilder {
-    // The following doc-comment is from bitcoin core, but modified for Rust. It describes the
+    // The following doc-comment is from Bitcoin Core, but modified for Rust. It describes the
     // current state of the builder for a given tree.
     //
     // For each level in the tree, one NodeInfo object may be present. Branch at index 0 is
@@ -384,8 +365,13 @@ pub struct TaprootBuilder {
 
 impl TaprootBuilder {
     /// Creates a new instance of [`TaprootBuilder`].
-    pub fn new() -> Self {
-        TaprootBuilder { branch: vec![] }
+    pub fn new() -> Self { TaprootBuilder { branch: vec![] } }
+
+    /// Creates a new instance of [`TaprootBuilder`] with a capacity hint for `size` elements.
+    ///
+    /// The size here should be maximum depth of the tree.
+    pub fn with_capacity(size: usize) -> Self {
+        TaprootBuilder { branch: Vec::with_capacity(size) }
     }
 
     /// Creates a new [`TaprootSpendInfo`] from a list of scripts (with default script version) and
@@ -394,7 +380,7 @@ impl TaprootBuilder {
     /// The weights represent the probability of each branch being taken. If probabilities/weights
     /// for each condition are known, constructing the tree as a Huffman Tree is the optimal way to
     /// minimize average case satisfaction cost. This function takes as input an iterator of
-    /// `tuple(u32, &Script)` where `u32` represents the satisfaction weights of the branch. For
+    /// `tuple(u32, ScriptBuf)` where `u32` represents the satisfaction weights of the branch. For
     /// example, [(3, S1), (2, S2), (5, S3)] would construct a [`TapTree`] that has optimal
     /// satisfaction weight when probability for S1 is 30%, S2 is 20% and S3 is 50%.
     ///
@@ -408,19 +394,18 @@ impl TaprootBuilder {
     /// If the script weight calculations overflow, a sub-optimal tree may be generated. This should
     /// not happen unless you are dealing with billions of branches with weights close to 2^32.
     ///
-    /// [`TapTree`]: ::util::psbt::TapTree
-    pub fn with_huffman_tree<I>(
-        script_weights: I,
-    ) -> Result<Self, TaprootBuilderError>
-    where
-        I: IntoIterator<Item=(u32, Script)>,
+    /// [`TapTree`]: crate::taproot::TapTree
+    pub fn with_huffman_tree<I>(script_weights: I) -> Result<Self, TaprootBuilderError>
+        where
+            I: IntoIterator<Item=(u32, ScriptBuf)>,
     {
         let mut node_weights = BinaryHeap::<(Reverse<u32>, NodeInfo)>::new();
         for (p, leaf) in script_weights {
-            node_weights.push((Reverse(p), NodeInfo::new_leaf_with_ver(leaf, LeafVersion::TapScript)));
+            node_weights
+                .push((Reverse(p), NodeInfo::new_leaf_with_ver(leaf, LeafVersion::TapScript)));
         }
         if node_weights.is_empty() {
-            return Err(TaprootBuilderError::IncompleteTree);
+            return Err(TaprootBuilderError::EmptyTree);
         }
         while node_weights.len() > 1 {
             // Combine the last two elements and insert a new node
@@ -437,7 +422,7 @@ impl TaprootBuilder {
         // Therefore, the loop will eventually terminate with exactly 1 element
         debug_assert_eq!(node_weights.len(), 1);
         let node = node_weights.pop().expect("huffman tree algorithm is broken").1;
-        Ok(TaprootBuilder{branch: vec![Some(node)]})
+        Ok(TaprootBuilder { branch: vec![Some(node)] })
     }
 
     /// Adds a leaf script at `depth` to the builder with script version `ver`. Errors if the leaves
@@ -445,7 +430,7 @@ impl TaprootBuilder {
     pub fn add_leaf_with_ver(
         self,
         depth: u8,
-        script: Script,
+        script: ScriptBuf,
         ver: LeafVersion,
     ) -> Result<Self, TaprootBuilderError> {
         let leaf = NodeInfo::new_leaf_with_ver(script, ver);
@@ -456,55 +441,82 @@ impl TaprootBuilder {
     /// leaves are not provided in DFS walk order. The depth of the root node is 0.
     ///
     /// See [`TaprootBuilder::add_leaf_with_ver`] for adding a leaf with specific version.
-    pub fn add_leaf(self, depth: u8, script: Script) -> Result<Self, TaprootBuilderError> {
+    pub fn add_leaf(self, depth: u8, script: ScriptBuf) -> Result<Self, TaprootBuilderError> {
         self.add_leaf_with_ver(depth, script, LeafVersion::TapScript)
     }
 
     /// Adds a hidden/omitted node at `depth` to the builder. Errors if the leaves are not provided
     /// in DFS walk order. The depth of the root node is 0.
-    pub fn add_hidden_node(self, depth: u8, hash: sha256::Hash) -> Result<Self, TaprootBuilderError> {
+    pub fn add_hidden_node(
+        self,
+        depth: u8,
+        hash: TapNodeHash,
+    ) -> Result<Self, TaprootBuilderError> {
         let node = NodeInfo::new_hidden_node(hash);
         self.insert(node, depth)
     }
 
     /// Checks if the builder has finalized building a tree.
-    pub fn is_finalized(&self) -> bool {
-        self.branch.len() == 1 && self.branch[0].is_some()
+    pub fn is_finalizable(&self) -> bool { self.branch.len() == 1 && self.branch[0].is_some() }
+
+    /// Converts the builder into a [`NodeInfo`] if the builder is a full tree with possibly
+    /// hidden nodes
+    ///
+    /// # Errors:
+    ///
+    /// [`IncompleteBuilder::NotFinalized`] if the builder is not finalized. The builder
+    /// can be restored by calling [`IncompleteBuilder::into_builder`]
+    pub fn try_into_node_info(mut self) -> Result<NodeInfo, IncompleteBuilder> {
+        if self.branch().len() != 1 {
+            return Err(IncompleteBuilder::NotFinalized(self));
+        }
+        Ok(self
+            .branch
+            .pop()
+            .expect("length checked above")
+            .expect("invariant guarantees node info exists"))
+    }
+
+    /// Converts the builder into a [`TapTree`] if the builder is a full tree and
+    /// does not contain any hidden nodes
+    pub fn try_into_taptree(self) -> Result<TapTree, IncompleteBuilder> {
+        let node = self.try_into_node_info()?;
+        if node.has_hidden_nodes {
+            // Reconstruct the builder as it was if it has hidden nodes
+            return Err(IncompleteBuilder::HiddenParts(TaprootBuilder {
+                branch: vec![Some(node)],
+            }));
+        }
+        Ok(TapTree(node))
     }
 
     /// Checks if the builder has hidden nodes.
     pub fn has_hidden_nodes(&self) -> bool {
-        for node in &self.branch {
-            if let Some(node) = node {
-                if node.has_hidden_nodes {
-                    return true
-                }
-            }
-        }
-        false
+        self.branch.iter().flatten().any(|node| node.has_hidden_nodes)
     }
 
     /// Creates a [`TaprootSpendInfo`] with the given internal key.
     ///
-    // TODO: in a future breaking API change, this no longer needs to return result
+    /// Returns the unmodified builder as Err if the builder is not finalizable.
+    /// See also [`TaprootBuilder::is_finalizable`]
     pub fn finalize<C: secp256k1::Verification>(
         mut self,
         secp: &Secp256k1<C>,
         internal_key: UntweakedPublicKey,
-    ) -> Result<TaprootSpendInfo, TaprootBuilderError> {
-        match self.branch.pop() {
-            None => Ok(TaprootSpendInfo::new_key_spend(secp, internal_key, None)),
-            Some(Some(node)) => {
-                Ok(TaprootSpendInfo::from_node_info(secp, internal_key, node))
-            }
-            _ => Err(TaprootBuilderError::IncompleteTree),
-
+    ) -> Result<TaprootSpendInfo, TaprootBuilder> {
+        match self.branch.len() {
+            0 => Ok(TaprootSpendInfo::new_key_spend(secp, internal_key, None)),
+            1 =>
+                if let Some(Some(node)) = self.branch.pop() {
+                    Ok(TaprootSpendInfo::from_node_info(secp, internal_key, node))
+                } else {
+                    unreachable!("Size checked above. Builder guarantees the last element is Some")
+                },
+            _ => Err(self),
         }
     }
 
-    pub(crate) fn branch(&self) -> &[Option<NodeInfo>] {
-        &self.branch
-    }
+    pub(crate) fn branch(&self) -> &[Option<NodeInfo>] { &self.branch }
 
     /// Inserts a leaf at `depth`.
     fn insert(mut self, mut node: NodeInfo, mut depth: u8) -> Result<Self, TaprootBuilderError> {
@@ -516,7 +528,7 @@ impl TaprootBuilder {
         // We cannot insert a leaf at a lower depth while a deeper branch is unfinished. Doing
         // so would mean the add_leaf/add_hidden invocations do not correspond to a DFS traversal of a
         // binary tree.
-        if depth as usize + 1 < self.branch.len() {
+        if (depth as usize + 1) < self.branch.len() {
             return Err(TaprootBuilderError::NodeNotInDfsOrder);
         }
 
@@ -544,8 +556,7 @@ impl TaprootBuilder {
         if self.branch.len() < depth as usize + 1 {
             // add enough nodes so that we can insert node at depth `depth`
             let num_extra_nodes = depth as usize + 1 - self.branch.len();
-            self.branch
-                .extend((0..num_extra_nodes).into_iter().map(|_| None));
+            self.branch.extend((0..num_extra_nodes).map(|_| None));
         }
         // Push the last node to the branch
         self.branch[depth as usize] = Some(node);
@@ -553,7 +564,207 @@ impl TaprootBuilder {
     }
 }
 
-/// Represents the node information in taproot tree.
+impl Default for TaprootBuilder {
+    fn default() -> Self { Self::new() }
+}
+
+/// Error happening when [`TapTree`] is constructed from a [`TaprootBuilder`]
+/// having hidden branches or not being finalized.
+#[derive(Clone, Ord, PartialOrd, Eq, PartialEq, Hash, Debug)]
+#[non_exhaustive]
+pub enum IncompleteBuilder {
+    /// Indicates an attempt to construct a tap tree from a builder containing incomplete branches.
+    NotFinalized(TaprootBuilder),
+    /// Indicates an attempt to construct a tap tree from a builder containing hidden parts.
+    HiddenParts(TaprootBuilder),
+}
+
+impl IncompleteBuilder {
+    /// Converts error into the original incomplete [`TaprootBuilder`] instance.
+    pub fn into_builder(self) -> TaprootBuilder {
+        match self {
+            IncompleteBuilder::NotFinalized(builder) | IncompleteBuilder::HiddenParts(builder) =>
+                builder,
+        }
+    }
+}
+
+impl core::fmt::Display for IncompleteBuilder {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        f.write_str(match self {
+            IncompleteBuilder::NotFinalized(_) =>
+                "an attempt to construct a tap tree from a builder containing incomplete branches.",
+            IncompleteBuilder::HiddenParts(_) =>
+                "an attempt to construct a tap tree from a builder containing hidden parts.",
+        })
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for IncompleteBuilder {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::IncompleteBuilder::*;
+
+        match self {
+            NotFinalized(_) | HiddenParts(_) => None,
+        }
+    }
+}
+
+/// Error happening when [`TapTree`] is constructed from a [`NodeInfo`]
+/// having hidden branches.
+#[derive(Clone, Ord, PartialOrd, Eq, PartialEq, Hash, Debug)]
+#[non_exhaustive]
+pub enum HiddenNodes {
+    /// Indicates an attempt to construct a tap tree from a builder containing hidden parts.
+    HiddenParts(NodeInfo),
+}
+
+impl HiddenNodes {
+    /// Converts error into the original incomplete [`NodeInfo`] instance.
+    pub fn into_node_info(self) -> NodeInfo {
+        match self {
+            HiddenNodes::HiddenParts(node_info) => node_info,
+        }
+    }
+}
+
+impl core::fmt::Display for HiddenNodes {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        f.write_str(match self {
+            HiddenNodes::HiddenParts(_) =>
+                "an attempt to construct a tap tree from a node_info containing hidden parts.",
+        })
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for HiddenNodes {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::HiddenNodes::*;
+
+        match self {
+            HiddenParts(_) => None,
+        }
+    }
+}
+
+/// Taproot Tree representing a complete binary tree without any hidden nodes.
+///
+/// This is in contrast to [`NodeInfo`], which allows hidden nodes.
+/// The implementations for Eq, PartialEq and Hash compare the merkle root of the tree
+//
+// This is a bug in BIP370 that does not specify how to share trees with hidden nodes,
+// for which we need a separate type.
+#[derive(Clone, Debug, Eq, PartialEq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+#[cfg_attr(feature = "serde", serde(into = "NodeInfo"))]
+#[cfg_attr(feature = "serde", serde(try_from = "NodeInfo"))]
+pub struct TapTree(NodeInfo);
+
+impl From<TapTree> for NodeInfo {
+    #[inline]
+    fn from(tree: TapTree) -> Self { tree.into_node_info() }
+}
+
+impl TapTree {
+    /// Gets the reference to inner [`NodeInfo`] of this tree root.
+    pub fn node_info(&self) -> &NodeInfo { &self.0 }
+
+    /// Gets the inner [`NodeInfo`] of this tree root.
+    pub fn into_node_info(self) -> NodeInfo { self.0 }
+
+    /// Returns [`TapTreeIter<'_>`] iterator for a taproot script tree, operating in DFS order over
+    /// tree [`ScriptLeaf`]s.
+    pub fn script_leaves(&self) -> ScriptLeaves { ScriptLeaves { leaf_iter: self.0.leaf_nodes() } }
+}
+
+impl TryFrom<TaprootBuilder> for TapTree {
+    type Error = IncompleteBuilder;
+
+    /// Constructs [`TapTree`] from a [`TaprootBuilder`] if it is complete binary tree.
+    ///
+    /// # Returns
+    ///
+    /// A [`TapTree`] iff the `builder` is complete, otherwise return [`IncompleteBuilder`]
+    /// error with the content of incomplete `builder` instance.
+    fn try_from(builder: TaprootBuilder) -> Result<Self, Self::Error> { builder.try_into_taptree() }
+}
+
+impl TryFrom<NodeInfo> for TapTree {
+    type Error = HiddenNodes;
+
+    /// Constructs [`TapTree`] from a [`NodeInfo`] if it is complete binary tree.
+    ///
+    /// # Returns
+    ///
+    /// A [`TapTree`] iff the [`NodeInfo`] has no hidden nodes, otherwise return [`HiddenNodes`]
+    /// error with the content of incomplete [`NodeInfo`] instance.
+    fn try_from(node_info: NodeInfo) -> Result<Self, Self::Error> {
+        if node_info.has_hidden_nodes {
+            Err(HiddenNodes::HiddenParts(node_info))
+        } else {
+            Ok(TapTree(node_info))
+        }
+    }
+}
+
+/// Iterator for a taproot script tree, operating in DFS order yielding [`ScriptLeaf`].
+///
+/// Returned by [`TapTree::script_leaves`]. [`TapTree`] does not allow hidden nodes,
+/// so this iterator is guaranteed to yield all known leaves.
+pub struct ScriptLeaves<'tree> {
+    leaf_iter: LeafNodes<'tree>,
+}
+
+impl<'tree> Iterator for ScriptLeaves<'tree> {
+    type Item = ScriptLeaf<'tree>;
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> { ScriptLeaf::from_leaf_node(self.leaf_iter.next()?) }
+
+    fn size_hint(&self) -> (usize, Option<usize>) { self.leaf_iter.size_hint() }
+}
+
+impl<'tree> ExactSizeIterator for ScriptLeaves<'tree> {}
+
+impl<'tree> FusedIterator for ScriptLeaves<'tree> {}
+
+impl<'tree> DoubleEndedIterator for ScriptLeaves<'tree> {
+    #[inline]
+    fn next_back(&mut self) -> Option<Self::Item> {
+        ScriptLeaf::from_leaf_node(self.leaf_iter.next_back()?)
+    }
+}
+
+/// Iterator for a taproot script tree, operating in DFS order yielding [`LeafNode`].
+///
+/// Returned by [`NodeInfo::leaf_nodes`]. This can potentially yield hidden nodes.
+pub struct LeafNodes<'a> {
+    leaf_iter: core::slice::Iter<'a, LeafNode>,
+}
+
+impl<'a> Iterator for LeafNodes<'a> {
+    type Item = &'a LeafNode;
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> { self.leaf_iter.next() }
+
+    fn size_hint(&self) -> (usize, Option<usize>) { self.leaf_iter.size_hint() }
+}
+
+impl<'tree> ExactSizeIterator for LeafNodes<'tree> {}
+
+impl<'tree> FusedIterator for LeafNodes<'tree> {}
+
+impl<'tree> DoubleEndedIterator for LeafNodes<'tree> {
+    #[inline]
+    fn next_back(&mut self) -> Option<Self::Item> { self.leaf_iter.next_back() }
+}
+
+/// Represents the node information in taproot tree. In contrast to [`TapTree`], this
+/// is allowed to have hidden leaves as children.
 ///
 /// Helper type used in merkle tree construction allowing one to build sparse merkle trees. The node
 /// represents part of the tree that has information about all of its descendants.
@@ -561,33 +772,37 @@ impl TaprootBuilder {
 ///
 /// You can use [`TaprootSpendInfo::from_node_info`] to a get a [`TaprootSpendInfo`] from the merkle
 /// root [`NodeInfo`].
-#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[derive(Debug, Clone, PartialOrd, Ord)]
 pub struct NodeInfo {
     /// Merkle hash for this node.
-    pub(crate) hash: sha256::Hash,
+    pub(crate) hash: TapNodeHash,
     /// Information about leaves inside this node.
-    pub(crate) leaves: Vec<ScriptLeaf>,
+    pub(crate) leaves: Vec<LeafNode>,
     /// Tracks information on hidden nodes below this node.
     pub(crate) has_hidden_nodes: bool,
 }
 
+impl PartialEq for NodeInfo {
+    fn eq(&self, other: &Self) -> bool { self.hash.eq(&other.hash) }
+}
+
+impl core::hash::Hash for NodeInfo {
+    fn hash<H: core::hash::Hasher>(&self, state: &mut H) { self.hash.hash(state) }
+}
+
+impl Eq for NodeInfo {}
+
 impl NodeInfo {
     /// Creates a new [`NodeInfo`] with omitted/hidden info.
-    pub fn new_hidden_node(hash: sha256::Hash) -> Self {
-        Self {
-            hash: hash,
-            leaves: vec![],
-            has_hidden_nodes: true
-        }
+    pub fn new_hidden_node(hash: TapNodeHash) -> Self {
+        Self { hash, leaves: vec![], has_hidden_nodes: true }
     }
 
-    /// Creates a new leaf [`NodeInfo`] with given [`Script`] and [`LeafVersion`].
-    pub fn new_leaf_with_ver(script: Script, ver: LeafVersion) -> Self {
-        let leaf = ScriptLeaf::new(script, ver);
+    /// Creates a new leaf [`NodeInfo`] with given [`ScriptBuf`] and [`LeafVersion`].
+    pub fn new_leaf_with_ver(script: ScriptBuf, ver: LeafVersion) -> Self {
         Self {
-            hash: sha256::Hash::from_inner(leaf.leaf_hash().into_inner()),
-            leaves: vec![leaf],
+            hash: TapNodeHash::from_script(&script, ver),
+            leaves: vec![LeafNode::new_script(script, ver)],
             has_hidden_nodes: false,
         }
     }
@@ -595,6 +810,8 @@ impl NodeInfo {
     /// Combines two [`NodeInfo`] to create a new parent.
     pub fn combine(a: Self, b: Self) -> Result<Self, TaprootBuilderError> {
         let mut all_leaves = Vec::with_capacity(a.leaves.len() + b.leaves.len());
+        let (hash, left_first) = TapNodeHash::combine_node_hashes(a.hash, b.hash);
+        let (a, b) = if left_first { (a, b) } else { (b, a) };
         for mut a_leaf in a.leaves {
             a_leaf.merkle_branch.push(b.hash)?; // add hashing partner
             all_leaves.push(a_leaf);
@@ -603,103 +820,289 @@ impl NodeInfo {
             b_leaf.merkle_branch.push(a.hash)?; // add hashing partner
             all_leaves.push(b_leaf);
         }
-        let hash = TapBranchHash::from_node_hashes(a.hash, b.hash);
         Ok(Self {
-            hash: sha256::Hash::from_inner(hash.into_inner()),
+            hash,
             leaves: all_leaves,
-            has_hidden_nodes: a.has_hidden_nodes || b.has_hidden_nodes
+            has_hidden_nodes: a.has_hidden_nodes || b.has_hidden_nodes,
         })
     }
+
+    /// Creates an iterator over all leaves (including hidden leaves) in the tree.
+    pub fn leaf_nodes(&self) -> LeafNodes { LeafNodes { leaf_iter: self.leaves.iter() } }
 }
 
-/// Store information about taproot leaf node.
+impl TryFrom<TaprootBuilder> for NodeInfo {
+    type Error = IncompleteBuilder;
+
+    fn try_from(builder: TaprootBuilder) -> Result<Self, Self::Error> {
+        builder.try_into_node_info()
+    }
+}
+
+#[cfg(feature = "serde")]
+impl serde::Serialize for NodeInfo {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+        where
+            S: serde::Serializer,
+    {
+        use serde::ser::SerializeSeq;
+        let mut seq = serializer.serialize_seq(Some(self.leaves.len() * 2))?;
+        for tap_leaf in self.leaves.iter() {
+            seq.serialize_element(&tap_leaf.merkle_branch().len())?;
+            seq.serialize_element(&tap_leaf.leaf)?;
+        }
+        seq.end()
+    }
+}
+
+#[cfg(feature = "serde")]
+impl<'de> serde::Deserialize<'de> for NodeInfo {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+        where
+            D: serde::Deserializer<'de>,
+    {
+        struct SeqVisitor;
+        impl<'de> serde::de::Visitor<'de> for SeqVisitor {
+            type Value = NodeInfo;
+
+            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                formatter.write_str("Taproot tree in DFS walk order")
+            }
+
+            fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
+                where
+                    A: serde::de::SeqAccess<'de>,
+            {
+                let size = seq
+                    .size_hint()
+                    .map(|x| core::mem::size_of::<usize>() * 8 - x.leading_zeros() as usize)
+                    .map(|x| x / 2) // Each leaf is serialized as two elements.
+                    .unwrap_or(0)
+                    .min(TAPROOT_CONTROL_MAX_NODE_COUNT); // no more than 128 nodes
+                let mut builder = TaprootBuilder::with_capacity(size);
+                while let Some(depth) = seq.next_element()? {
+                    let tap_leaf: TapLeaf = seq
+                        .next_element()?
+                        .ok_or_else(|| serde::de::Error::custom("Missing tap_leaf"))?;
+                    match tap_leaf {
+                        TapLeaf::Script(script, ver) => {
+                            builder =
+                                builder.add_leaf_with_ver(depth, script, ver).map_err(|e| {
+                                    serde::de::Error::custom(format!("Leaf insertion error: {}", e))
+                                })?;
+                        }
+                        TapLeaf::Hidden(h) => {
+                            builder = builder.add_hidden_node(depth, h).map_err(|e| {
+                                serde::de::Error::custom(format!(
+                                    "Hidden node insertion error: {}",
+                                    e
+                                ))
+                            })?;
+                        }
+                    }
+                }
+                NodeInfo::try_from(builder).map_err(|e| {
+                    serde::de::Error::custom(format!("Incomplete taproot tree: {}", e))
+                })
+            }
+        }
+
+        deserializer.deserialize_seq(SeqVisitor)
+    }
+}
+
+/// Leaf node in a taproot tree. Can be either hidden or known.
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct ScriptLeaf {
-    /// The underlying script.
-    script: Script,
-    /// The leaf version.
-    ver: LeafVersion,
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+pub enum TapLeaf {
+    /// A known script
+    Script(ScriptBuf, LeafVersion),
+    /// Hidden Node with the given leaf hash
+    Hidden(TapNodeHash),
+}
+
+impl TapLeaf {
+    /// Obtains the hidden leaf hash if the leaf is hidden.
+    pub fn as_hidden(&self) -> Option<&TapNodeHash> {
+        if let Self::Hidden(v) = self {
+            Some(v)
+        } else {
+            None
+        }
+    }
+
+    /// Obtains a reference to script and version if the leaf is known.
+    pub fn as_script(&self) -> Option<(&Script, LeafVersion)> {
+        if let Self::Script(script, ver) = self {
+            Some((script, *ver))
+        } else {
+            None
+        }
+    }
+}
+
+/// Store information about taproot leaf node.
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct LeafNode {
+    /// The [`TapLeaf`]
+    leaf: TapLeaf,
     /// The merkle proof (hashing partners) to get this node.
     merkle_branch: TaprootMerkleBranch,
 }
 
-impl ScriptLeaf {
+impl LeafNode {
     /// Creates an new [`ScriptLeaf`] from `script` and `ver` and no merkle branch.
-    fn new(script: Script, ver: LeafVersion) -> Self {
-        Self {
-            script: script,
-            ver: ver,
-            merkle_branch: TaprootMerkleBranch(vec![]),
-        }
+    pub fn new_script(script: ScriptBuf, ver: LeafVersion) -> Self {
+        Self { leaf: TapLeaf::Script(script, ver), merkle_branch: TaprootMerkleBranch(vec![]) }
+    }
+
+    /// Creates an new [`ScriptLeaf`] from `hash` and no merkle branch.
+    pub fn new_hidden(hash: TapNodeHash) -> Self {
+        Self { leaf: TapLeaf::Hidden(hash), merkle_branch: TaprootMerkleBranch(vec![]) }
     }
 
     /// Returns the depth of this script leaf in the tap tree.
     #[inline]
     pub fn depth(&self) -> u8 {
-        // The depth is guaranteed to be < 127 by the TaprootBuilder type.
-        // TODO: Following MSRV bump implement via `try_into().expect("")`.
-        self.merkle_branch.0.len() as u8
+        // Depth is guarded by TAPROOT_CONTROL_MAX_NODE_COUNT.
+        u8::try_from(self.merkle_branch().0.len()).expect("depth is guaranteed to fit in a u8")
     }
 
-    /// Computes a leaf hash for this [`ScriptLeaf`].
+    /// Computes a leaf hash for this [`ScriptLeaf`] if the leaf is known.
+    ///
+    /// This [`TapLeafHash`] is useful while signing taproot script spends.
+    ///
+    /// See [`LeafNode::node_hash`] for computing the [`TapNodeHash`] which returns the hidden node
+    /// hash if the node is hidden.
     #[inline]
-    pub fn leaf_hash(&self) -> TapLeafHash {
-        TapLeafHash::from_script(&self.script, self.ver)
+    pub fn leaf_hash(&self) -> Option<TapLeafHash> {
+        let (script, ver) = self.leaf.as_script()?;
+        Some(TapLeafHash::from_script(script, ver))
     }
 
-    /// Returns reference to the leaf script.
+    /// Computes the [`TapNodeHash`] for this [`ScriptLeaf`]. This returns the
+    /// leaf hash if the leaf is known and the hidden node hash if the leaf is
+    /// hidden.
+    /// See also, [`LeafNode::leaf_hash`].
     #[inline]
-    pub fn script(&self) -> &Script {
-        &self.script
+    pub fn node_hash(&self) -> TapNodeHash {
+        match self.leaf {
+            TapLeaf::Script(ref script, ver) => TapLeafHash::from_script(script, ver).into(),
+            TapLeaf::Hidden(ref hash) => *hash,
+        }
     }
 
-    /// Returns leaf version of the script.
+    /// Returns reference to the leaf script if the leaf is known.
     #[inline]
-    pub fn leaf_version(&self) -> LeafVersion {
-        self.ver
-    }
+    pub fn script(&self) -> Option<&Script> { self.leaf.as_script().map(|x| x.0) }
+
+    /// Returns leaf version of the script if the leaf is known.
+    #[inline]
+    pub fn leaf_version(&self) -> Option<LeafVersion> { self.leaf.as_script().map(|x| x.1) }
 
     /// Returns reference to the merkle proof (hashing partners) to get this
     /// node in form of [`TaprootMerkleBranch`].
     #[inline]
-    pub fn merkle_branch(&self) -> &TaprootMerkleBranch {
-        &self.merkle_branch
+    pub fn merkle_branch(&self) -> &TaprootMerkleBranch { &self.merkle_branch }
+
+    /// Returns a reference to the leaf of this [`ScriptLeaf`].
+    #[inline]
+    pub fn leaf(&self) -> &TapLeaf { &self.leaf }
+}
+
+/// Script leaf node in a taproot tree along with the merkle proof to get this node.
+/// Returned by [`TapTree::script_leaves`]
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct ScriptLeaf<'leaf> {
+    /// The version of the script leaf.
+    version: LeafVersion,
+    /// The script.
+    script: &'leaf Script,
+    /// The merkle proof (hashing partners) to get this node.
+    merkle_branch: &'leaf TaprootMerkleBranch,
+}
+
+impl<'leaf> ScriptLeaf<'leaf> {
+    /// Obtains the version of the script leaf.
+    pub fn version(&self) -> LeafVersion { self.version }
+
+    /// Obtains a reference to the script inside the leaf.
+    pub fn script(&self) -> &Script { self.script }
+
+    /// Obtains a reference to the merkle proof of the leaf.
+    pub fn merkle_branch(&self) -> &TaprootMerkleBranch { self.merkle_branch }
+
+    /// Obtains a script leaf from the leaf node if the leaf is not hidden.
+    pub fn from_leaf_node(leaf_node: &'leaf LeafNode) -> Option<Self> {
+        let (script, ver) = leaf_node.leaf.as_script()?;
+        Some(Self { version: ver, script, merkle_branch: &leaf_node.merkle_branch })
     }
 }
 
 /// The merkle proof for inclusion of a tree in a taptree hash.
-// The type of hash is `sha256::Hash` because the vector might contain both `TapBranchHash` and
-// `TapLeafHash`.
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Default)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct TaprootMerkleBranch(Vec<sha256::Hash>);
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
+#[cfg_attr(feature = "serde", serde(into = "Vec<TapNodeHash>"))]
+#[cfg_attr(feature = "serde", serde(try_from = "Vec<TapNodeHash>"))]
+pub struct TaprootMerkleBranch(Vec<TapNodeHash>);
 
 impl TaprootMerkleBranch {
     /// Returns a reference to the inner vector of hashes.
-    pub fn as_inner(&self) -> &[sha256::Hash] {
-        &self.0
-    }
+    pub fn as_inner(&self) -> &[TapNodeHash] { &self.0 }
+
+    /// Returns the number of nodes in this merkle proof.
+    pub fn len(&self) -> usize { self.0.len() }
+
+    /// Checks if this merkle proof is empty.
+    pub fn is_empty(&self) -> bool { self.0.is_empty() }
+
+    /// Decodes bytes from control block.
+    #[deprecated(since = "0.30.0", note = "Use decode instead")]
+    pub fn from_slice(sl: &[u8]) -> Result<Self, TaprootError> { Self::decode(sl) }
 
-    /// Creates a merkle proof from raw data representing a list of hashes.
-    pub fn from_slice(sl: &[u8]) -> Result<Self, TaprootError> {
+    /// Decodes bytes from control block.
+    ///
+    /// This reads the branch as encoded in the control block: the concatenated 32B byte chunks -
+    /// one for each hash.
+    ///
+    /// # Errors
+    ///
+    /// The function returns an error if the the number of bytes is not an integer multiple of 32 or
+    /// if the number of hashes exceeds 128.
+    pub fn decode(sl: &[u8]) -> Result<Self, TaprootError> {
         if sl.len() % TAPROOT_CONTROL_NODE_SIZE != 0 {
             Err(TaprootError::InvalidMerkleBranchSize(sl.len()))
         } else if sl.len() > TAPROOT_CONTROL_NODE_SIZE * TAPROOT_CONTROL_MAX_NODE_COUNT {
             Err(TaprootError::InvalidMerkleTreeDepth(sl.len() / TAPROOT_CONTROL_NODE_SIZE))
         } else {
             let inner = sl
-                // TODO: Use chunks_exact after MSRV changes to 1.31
-                .chunks(TAPROOT_CONTROL_NODE_SIZE)
+                .chunks_exact(TAPROOT_CONTROL_NODE_SIZE)
                 .map(|chunk| {
-                    sha256::Hash::from_slice(chunk)
-                        .expect("chunk exact always returns the correct size")
+                    TapNodeHash::from_slice(chunk)
+                        .expect("chunks_exact always returns the correct size")
                 })
                 .collect();
+
             Ok(TaprootMerkleBranch(inner))
         }
     }
 
+    /// Creates a merkle proof from list of hashes.
+    ///
+    /// # Errors
+    /// If inner proof length is more than [`TAPROOT_CONTROL_MAX_NODE_COUNT`] (128).
+    fn from_collection<T: AsRef<[TapNodeHash]> + Into<Vec<TapNodeHash>>>(
+        collection: T,
+    ) -> Result<Self, TaprootError> {
+        if collection.as_ref().len() > TAPROOT_CONTROL_MAX_NODE_COUNT {
+            Err(TaprootError::InvalidMerkleTreeDepth(collection.as_ref().len()))
+        } else {
+            Ok(TaprootMerkleBranch(collection.into()))
+        }
+    }
+
     /// Serializes to a writer.
     ///
     /// # Returns
@@ -707,18 +1110,18 @@ impl TaprootMerkleBranch {
     /// The number of bytes written to the writer.
     pub fn encode<Write: io::Write>(&self, mut writer: Write) -> io::Result<usize> {
         for hash in self.0.iter() {
-            writer.write_all(hash)?;
+            writer.write_all(hash.as_ref())?;
         }
-        Ok(self.0.len() * sha256::Hash::LEN)
+        Ok(self.0.len() * TapNodeHash::LEN)
     }
 
     /// Serializes `self` as bytes.
     pub fn serialize(&self) -> Vec<u8> {
-        self.0.iter().map(|e| e.as_inner()).flatten().map(|x| *x).collect::<Vec<u8>>()
+        self.0.iter().flat_map(|e| e.as_byte_array()).copied().collect::<Vec<u8>>()
     }
 
     /// Appends elements to proof.
-    fn push(&mut self, h: sha256::Hash) -> Result<(), TaprootBuilderError> {
+    fn push(&mut self, h: TapNodeHash) -> Result<(), TaprootBuilderError> {
         if self.0.len() >= TAPROOT_CONTROL_MAX_NODE_COUNT {
             Err(TaprootBuilderError::InvalidMerkleTreeDepth(self.0.len()))
         } else {
@@ -727,28 +1130,61 @@ impl TaprootMerkleBranch {
         }
     }
 
-    /// Creates a merkle proof from list of hashes.
-    ///
-    /// # Errors
-    ///
-    /// If inner proof length is more than [`TAPROOT_CONTROL_MAX_NODE_COUNT`] (128).
-    pub fn from_inner(inner: Vec<sha256::Hash>) -> Result<Self, TaprootError> {
-        if inner.len() > TAPROOT_CONTROL_MAX_NODE_COUNT {
-            Err(TaprootError::InvalidMerkleTreeDepth(inner.len()))
-        } else {
-            Ok(TaprootMerkleBranch(inner))
+    /// Returns the inner list of hashes.
+    pub fn into_inner(self) -> Vec<TapNodeHash> { self.0 }
+}
+
+macro_rules! impl_try_from {
+    ($from:ty) => {
+        impl TryFrom<$from> for TaprootMerkleBranch {
+            type Error = TaprootError;
+
+            /// Creates a merkle proof from list of hashes.
+            ///
+            /// # Errors
+            /// If inner proof length is more than [`TAPROOT_CONTROL_MAX_NODE_COUNT`] (128).
+            fn try_from(v: $from) -> Result<Self, Self::Error> {
+                TaprootMerkleBranch::from_collection(v)
+            }
         }
+    };
+}
+impl_try_from!(&[TapNodeHash]);
+impl_try_from!(Vec<TapNodeHash>);
+impl_try_from!(Box<[TapNodeHash]>);
+
+macro_rules! impl_try_from_array {
+    ($($len:expr),* $(,)?) => {
+        $(
+            impl From<[TapNodeHash; $len]> for TaprootMerkleBranch {
+                fn from(a: [TapNodeHash; $len]) -> Self {
+                    Self(a.to_vec())
+                }
+            }
+        )*
     }
+}
+// Implement for all values [0, 128] inclusive.
+//
+// The reason zero is included is that `TaprootMerkleBranch` doesn't contain the hash of the node
+// that's being proven - it's not needed because the script is already right before control block.
+impl_try_from_array!(
+    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
+    26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49,
+    50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73,
+    74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97,
+    98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116,
+    117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128
+);
 
-    /// Returns the inner list of hashes.
-    pub fn into_inner(self) -> Vec<sha256::Hash> {
-        self.0
-    }
+impl From<TaprootMerkleBranch> for Vec<TapNodeHash> {
+    fn from(branch: TaprootMerkleBranch) -> Self { branch.0 }
 }
 
 /// Control block data structure used in Tapscript satisfaction.
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct ControlBlock {
     /// The tapleaf version.
     pub leaf_version: LeafVersion,
@@ -761,9 +1197,15 @@ pub struct ControlBlock {
 }
 
 impl ControlBlock {
-    /// Constructs a `ControlBlock` from slice. This is an extra witness element that provides the
-    /// proof that taproot script pubkey is correctly computed with some specified leaf hash. This
-    /// is the last element in taproot witness when spending a output via script path.
+    /// Constructs a `ControlBlock` from slice.
+    #[deprecated(since = "0.30.0", note = "Use decode instead")]
+    pub fn from_slice(sl: &[u8]) -> Result<ControlBlock, TaprootError> { Self::decode(sl) }
+
+    /// Decodes bytes representing a `ControlBlock`.
+    ///
+    /// This is an extra witness element that provides the proof that taproot script pubkey is
+    /// correctly computed with some specified leaf hash. This is the last element in taproot
+    /// witness when spending a output via script path.
     ///
     /// # Errors
     ///
@@ -772,24 +1214,19 @@ impl ControlBlock {
     /// - [`TaprootError::InvalidTaprootLeafVersion`] if first byte of `sl` is not a valid leaf version.
     /// - [`TaprootError::InvalidInternalKey`] if internal key is invalid (first 32 bytes after the parity byte).
     /// - [`TaprootError::InvalidMerkleTreeDepth`] if merkle tree is too deep (more than 128 levels).
-    pub fn from_slice(sl: &[u8]) -> Result<ControlBlock, TaprootError> {
+    pub fn decode(sl: &[u8]) -> Result<ControlBlock, TaprootError> {
         if sl.len() < TAPROOT_CONTROL_BASE_SIZE
             || (sl.len() - TAPROOT_CONTROL_BASE_SIZE) % TAPROOT_CONTROL_NODE_SIZE != 0
         {
             return Err(TaprootError::InvalidControlBlockSize(sl.len()));
         }
-        let output_key_parity = secp256k1::Parity::from_i32((sl[0] & 1) as i32)
-            .map_err(TaprootError::InvalidParity)?;
+        let output_key_parity =
+            secp256k1::Parity::from_i32((sl[0] & 1) as i32).map_err(TaprootError::InvalidParity)?;
         let leaf_version = LeafVersion::from_consensus(sl[0] & TAPROOT_LEAF_MASK)?;
         let internal_key = UntweakedPublicKey::from_slice(&sl[1..TAPROOT_CONTROL_BASE_SIZE])
             .map_err(TaprootError::InvalidInternalKey)?;
-        let merkle_branch = TaprootMerkleBranch::from_slice(&sl[TAPROOT_CONTROL_BASE_SIZE..])?;
-        Ok(ControlBlock {
-            leaf_version,
-            output_key_parity,
-            internal_key,
-            merkle_branch,
-        })
+        let merkle_branch = TaprootMerkleBranch::decode(&sl[TAPROOT_CONTROL_BASE_SIZE..])?;
+        Ok(ControlBlock { leaf_version, output_key_parity, internal_key, merkle_branch })
     }
 
     /// Returns the size of control block. Faster and more efficient than calling
@@ -804,7 +1241,8 @@ impl ControlBlock {
     ///
     /// The number of bytes written to the writer.
     pub fn encode<Write: io::Write>(&self, mut writer: Write) -> io::Result<usize> {
-        let first_byte: u8 = i32::from(self.output_key_parity) as u8 | self.leaf_version.to_consensus();
+        let first_byte: u8 =
+            i32::from(self.output_key_parity) as u8 | self.leaf_version.to_consensus();
         writer.write_all(&[first_byte])?;
         writer.write_all(&self.internal_key.serialize())?;
         self.merkle_branch.encode(&mut writer)?;
@@ -814,7 +1252,7 @@ impl ControlBlock {
     /// Serializes the control block.
     ///
     /// This would be required when using [`ControlBlock`] as a witness element while spending an
-    /// output via script path. This serialization does not include the [`::VarInt`] prefix that would
+    /// output via script path. This serialization does not include the [`crate::VarInt`] prefix that would
     /// be applied when encoding this element as a witness.
     pub fn serialize(&self) -> Vec<u8> {
         let mut buf = Vec::with_capacity(self.size());
@@ -834,24 +1272,16 @@ impl ControlBlock {
     ) -> bool {
         // compute the script hash
         // Initially the curr_hash is the leaf hash
-        let leaf_hash = TapLeafHash::from_script(&script, self.leaf_version);
-        let mut curr_hash = TapBranchHash::from_inner(leaf_hash.into_inner());
+        let mut curr_hash = TapNodeHash::from_script(script, self.leaf_version);
         // Verify the proof
         for elem in self.merkle_branch.as_inner() {
             // Recalculate the curr hash as parent hash
-            curr_hash = TapBranchHash::from_node_hashes(
-                sha256::Hash::from_inner(curr_hash.into_inner()),
-                *elem
-            );
+            curr_hash = TapNodeHash::from_node_hashes(curr_hash, *elem);
         }
         // compute the taptweak
-        let tweak = TapTweakHash::from_key_and_tweak(self.internal_key, Some(curr_hash)).to_scalar();
-        self.internal_key.tweak_add_check(
-            secp,
-            &output_key,
-            self.output_key_parity,
-            tweak,
-        )
+        let tweak =
+            TapTweakHash::from_key_and_tweak(self.internal_key, Some(curr_hash)).to_scalar();
+        self.internal_key.tweak_add_check(secp, &output_key, self.output_key_parity, tweak)
     }
 }
 
@@ -865,39 +1295,34 @@ pub struct FutureLeafVersion(u8);
 impl FutureLeafVersion {
     pub(self) fn from_consensus(version: u8) -> Result<FutureLeafVersion, TaprootError> {
         match version {
-            TAPROOT_LEAF_TAPSCRIPT => unreachable!("FutureLeafVersion::from_consensus should be never called for 0xC0 value"),
-            TAPROOT_ANNEX_PREFIX => Err(TaprootError::InvalidTaprootLeafVersion(TAPROOT_ANNEX_PREFIX)),
+            TAPROOT_LEAF_TAPSCRIPT => unreachable!(
+                "FutureLeafVersion::from_consensus should be never called for 0xC0 value"
+            ),
+            TAPROOT_ANNEX_PREFIX =>
+                Err(TaprootError::InvalidTaprootLeafVersion(TAPROOT_ANNEX_PREFIX)),
             odd if odd & 0xFE != odd => Err(TaprootError::InvalidTaprootLeafVersion(odd)),
-            even => Ok(FutureLeafVersion(even))
+            even => Ok(FutureLeafVersion(even)),
         }
     }
 
     /// Returns the consensus representation of this [`FutureLeafVersion`].
     #[inline]
-    pub fn to_consensus(self) -> u8 {
-        self.0
-    }
+    pub fn to_consensus(self) -> u8 { self.0 }
 }
 
 impl fmt::Display for FutureLeafVersion {
     #[inline]
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        fmt::Display::fmt(&self.0, f)
-    }
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { fmt::Display::fmt(&self.0, f) }
 }
 
 impl fmt::LowerHex for FutureLeafVersion {
     #[inline]
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        fmt::LowerHex::fmt(&self.0, f)
-    }
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { fmt::LowerHex::fmt(&self.0, f) }
 }
 
 impl fmt::UpperHex for FutureLeafVersion {
     #[inline]
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        fmt::UpperHex::fmt(&self.0, f)
-    }
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { fmt::UpperHex::fmt(&self.0, f) }
 }
 
 /// The leaf version for tapleafs.
@@ -907,7 +1332,7 @@ pub enum LeafVersion {
     TapScript,
 
     /// Future leaf version.
-    Future(FutureLeafVersion)
+    Future(FutureLeafVersion),
 }
 
 impl LeafVersion {
@@ -920,7 +1345,8 @@ impl LeafVersion {
     pub fn from_consensus(version: u8) -> Result<Self, TaprootError> {
         match version {
             TAPROOT_LEAF_TAPSCRIPT => Ok(LeafVersion::TapScript),
-            TAPROOT_ANNEX_PREFIX => Err(TaprootError::InvalidTaprootLeafVersion(TAPROOT_ANNEX_PREFIX)),
+            TAPROOT_ANNEX_PREFIX =>
+                Err(TaprootError::InvalidTaprootLeafVersion(TAPROOT_ANNEX_PREFIX)),
             future => FutureLeafVersion::from_consensus(future).map(LeafVersion::Future),
         }
     }
@@ -959,11 +1385,10 @@ impl fmt::UpperHex for LeafVersion {
 
 /// Serializes [`LeafVersion`] as a `u8` using consensus encoding.
 #[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-impl ::serde::Serialize for LeafVersion {
+impl serde::Serialize for LeafVersion {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: ::serde::Serializer,
+        where
+            S: serde::Serializer,
     {
         serializer.serialize_u8(self.to_consensus())
     }
@@ -971,26 +1396,34 @@ impl ::serde::Serialize for LeafVersion {
 
 /// Deserializes [`LeafVersion`] as a `u8` using consensus encoding.
 #[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-impl<'de> ::serde::Deserialize<'de> for LeafVersion {
+impl<'de> serde::Deserialize<'de> for LeafVersion {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
-    where
-        D: ::serde::Deserializer<'de>
+        where
+            D: serde::Deserializer<'de>,
     {
         struct U8Visitor;
-        impl<'de> ::serde::de::Visitor<'de> for U8Visitor {
+        impl<'de> serde::de::Visitor<'de> for U8Visitor {
             type Value = LeafVersion;
 
             fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
                 formatter.write_str("a valid consensus-encoded taproot leaf version")
             }
 
-            fn visit_u8<E>(self, value: u8) -> Result<Self::Value, E>
+            fn visit_u64<E>(self, value: u64) -> Result<Self::Value, E>
                 where
-                    E: ::serde::de::Error,
+                    E: serde::de::Error,
             {
+                let value = u8::try_from(value).map_err(|_| {
+                    E::invalid_value(
+                        serde::de::Unexpected::Unsigned(value),
+                        &"consensus-encoded leaf version as u8",
+                    )
+                })?;
                 LeafVersion::from_consensus(value).map_err(|_| {
-                    E::invalid_value(::serde::de::Unexpected::Unsigned(value as u64), &"consensus-encoded leaf version as u8")
+                    E::invalid_value(
+                        ::serde::de::Unexpected::Unsigned(value as u64),
+                        &"consensus-encoded leaf version as u8",
+                    )
                 })
             }
         }
@@ -1001,6 +1434,7 @@ impl<'de> ::serde::Deserialize<'de> for LeafVersion {
 
 /// Detailed error type for taproot builder.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[non_exhaustive]
 pub enum TaprootBuilderError {
     /// Merkle tree depth must not be more than 128.
     InvalidMerkleTreeDepth(usize),
@@ -1010,8 +1444,6 @@ pub enum TaprootBuilderError {
     OverCompleteTree,
     /// Invalid taproot internal key.
     InvalidInternalKey(secp256k1::Error),
-    /// Called finalize on an incomplete tree.
-    IncompleteTree,
     /// Called finalize on a empty tree.
     EmptyTree,
 }
@@ -1019,22 +1451,23 @@ pub enum TaprootBuilderError {
 impl fmt::Display for TaprootBuilderError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match *self {
+            TaprootBuilderError::InvalidMerkleTreeDepth(d) => {
+                write!(
+                    f,
+                    "Merkle Tree depth({}) must be less than {}",
+                    d, TAPROOT_CONTROL_MAX_NODE_COUNT
+                )
+            }
             TaprootBuilderError::NodeNotInDfsOrder => {
-                write!(f, "add_leaf/add_hidden must be called in DFS walk order",)
+                write!(f, "add_leaf/add_hidden must be called in DFS walk order", )
             }
             TaprootBuilderError::OverCompleteTree => write!(
                 f,
                 "Attempted to create a tree with two nodes at depth 0. There must\
                 only be a exactly one node at depth 0",
             ),
-            TaprootBuilderError::InvalidMerkleTreeDepth(d) => {
-                write!(f, "Merkle Tree depth({}) must be less than {}", d, TAPROOT_CONTROL_MAX_NODE_COUNT)
-            }
-            TaprootBuilderError::InvalidInternalKey(e) => {
-                write!(f, "Invalid Internal XOnly key : {}", e)
-            }
-            TaprootBuilderError::IncompleteTree => {
-                write!(f, "Called finalize on an incomplete tree")
+            TaprootBuilderError::InvalidInternalKey(ref e) => {
+                write_err!(f, "invalid internal x-only key"; e)
             }
             TaprootBuilderError::EmptyTree => {
                 write!(f, "Called finalize on an empty tree")
@@ -1044,11 +1477,20 @@ impl fmt::Display for TaprootBuilderError {
 }
 
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl error::Error for TaprootBuilderError {}
+impl std::error::Error for TaprootBuilderError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::TaprootBuilderError::*;
+
+        match self {
+            InvalidInternalKey(e) => Some(e),
+            InvalidMerkleTreeDepth(_) | NodeNotInDfsOrder | OverCompleteTree | EmptyTree => None,
+        }
+    }
+}
 
 /// Detailed error type for taproot utilities.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[non_exhaustive]
 pub enum TaprootError {
     /// Proof size must be a multiple of 32.
     InvalidMerkleBranchSize(usize),
@@ -1079,56 +1521,71 @@ impl fmt::Display for TaprootError {
                 "Merkle Tree depth({}) must be less than {}",
                 d, TAPROOT_CONTROL_MAX_NODE_COUNT
             ),
-            TaprootError::InvalidTaprootLeafVersion(v) => write!(
-                f,
-                "Leaf version({}) must have the least significant bit 0",
-                v
-            ),
+            TaprootError::InvalidTaprootLeafVersion(v) => {
+                write!(f, "Leaf version({}) must have the least significant bit 0", v)
+            }
             TaprootError::InvalidControlBlockSize(sz) => write!(
                 f,
                 "Control Block size({}) must be of the form 33 + 32*m where  0 <= m <= {} ",
                 sz, TAPROOT_CONTROL_MAX_NODE_COUNT
             ),
-            // TODO: add source when in MSRV
-            TaprootError::InvalidInternalKey(e) => write!(f, "Invalid Internal XOnly key : {}", e),
-            TaprootError::InvalidParity(e) => write!(f, "Invalid parity value for internal key: {}", e),
+            TaprootError::InvalidInternalKey(ref e) => {
+                write_err!(f, "invalid internal x-only key"; e)
+            }
+            TaprootError::InvalidParity(_) => write!(f, "invalid parity value for internal key"),
             TaprootError::EmptyTree => write!(f, "Taproot Tree must contain at least one script"),
         }
     }
 }
 
 #[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl error::Error for TaprootError {}
+impl std::error::Error for TaprootError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::TaprootError::*;
+
+        match self {
+            InvalidInternalKey(e) => Some(e),
+            InvalidMerkleBranchSize(_)
+            | InvalidMerkleTreeDepth(_)
+            | InvalidTaprootLeafVersion(_)
+            | InvalidControlBlockSize(_)
+            | InvalidParity(_)
+            | EmptyTree => None,
+        }
+    }
+}
+
 #[cfg(test)]
 mod test {
-    use {Address, Network};
-    use schnorr::TapTweak;
+    use core::str::FromStr;
 
-    use super::*;
-    use hashes::hex::{FromHex, ToHex};
+    use hashes::hex::FromHex;
     use hashes::sha256t::Tag;
     use hashes::{sha256, Hash, HashEngine};
     use secp256k1::{VerifyOnly, XOnlyPublicKey};
-    use core::str::FromStr;
+
+    use super::*;
+    use crate::sighash::{TapSighash, TapSighashTag};
+    use crate::{Address, Network};
     extern crate serde_json;
 
+    #[cfg(feature = "serde")]
+    use {
+        crate::internal_macros::hex,
+        serde_test::Configure,
+        serde_test::{assert_tokens, Token},
+    };
+
     fn tag_engine(tag_name: &str) -> sha256::HashEngine {
         let mut engine = sha256::Hash::engine();
         let tag_hash = sha256::Hash::hash(tag_name.as_bytes());
-        engine.input(&tag_hash[..]);
-        engine.input(&tag_hash[..]);
+        engine.input(tag_hash.as_ref());
+        engine.input(tag_hash.as_ref());
         engine
     }
 
     #[test]
     fn test_midstates() {
-        // check midstate against hard-coded values
-        assert_eq!(MIDSTATE_TAPLEAF, tag_engine("TapLeaf").midstate().into_inner());
-        assert_eq!(MIDSTATE_TAPBRANCH, tag_engine("TapBranch").midstate().into_inner());
-        assert_eq!(MIDSTATE_TAPTWEAK, tag_engine("TapTweak").midstate().into_inner());
-        assert_eq!(MIDSTATE_TAPSIGHASH, tag_engine("TapSighash").midstate().into_inner());
-
         // test that engine creation roundtrips
         assert_eq!(tag_engine("TapLeaf").midstate(), TapLeafTag::engine().midstate());
         assert_eq!(tag_engine("TapBranch").midstate(), TapBranchTag::engine().midstate());
@@ -1139,12 +1596,12 @@ mod test {
         fn empty_hash(tag_name: &str) -> [u8; 32] {
             let mut e = tag_engine(tag_name);
             e.input(&[]);
-            sha256::Hash::from_engine(e).into_inner()
+            TapNodeHash::from_engine(e).to_byte_array()
         }
-        assert_eq!(empty_hash("TapLeaf"), TapLeafHash::hash(&[]).into_inner());
-        assert_eq!(empty_hash("TapBranch"), TapBranchHash::hash(&[]).into_inner());
-        assert_eq!(empty_hash("TapTweak"), TapTweakHash::hash(&[]).into_inner());
-        assert_eq!(empty_hash("TapSighash"), TapSighashHash::hash(&[]).into_inner());
+        assert_eq!(empty_hash("TapLeaf"), TapLeafHash::hash(&[]).to_byte_array());
+        assert_eq!(empty_hash("TapBranch"), TapNodeHash::hash(&[]).to_byte_array());
+        assert_eq!(empty_hash("TapTweak"), TapTweakHash::hash(&[]).to_byte_array());
+        assert_eq!(empty_hash("TapSighash"), TapSighash::hash(&[]).to_byte_array());
     }
 
     #[test]
@@ -1155,19 +1612,19 @@ mod test {
         //   CHashWriter writer = HasherTapLeaf;
         //   writer.GetSHA256().GetHex()
         assert_eq!(
-            TapLeafHash::from_engine(TapLeafTag::engine()).to_hex(),
+            TapLeafHash::from_engine(TapLeafTag::engine()).to_string(),
             "5212c288a377d1f8164962a5a13429f9ba6a7b84e59776a52c6637df2106facb"
         );
         assert_eq!(
-            TapBranchHash::from_engine(TapBranchTag::engine()).to_hex(),
+            TapNodeHash::from_engine(TapBranchTag::engine()).to_string(),
             "53c373ec4d6f3c53c1f5fb2ff506dcefe1a0ed74874f93fa93c8214cbe9ffddf"
         );
         assert_eq!(
-            TapTweakHash::from_engine(TapTweakTag::engine()).to_hex(),
+            TapTweakHash::from_engine(TapTweakTag::engine()).to_string(),
             "8aa4229474ab0100b2d6f0687f031d1fc9d8eef92a042ad97d279bff456b15e4"
         );
         assert_eq!(
-            TapSighashHash::from_engine(TapSighashTag::engine()).to_hex(),
+            TapSighash::from_engine(TapSighashTag::engine()).to_string(),
             "dabc11914abcd8072900042a2681e52f8dba99ce82e224f97b5fdb7cd4b9c803"
         );
 
@@ -1177,47 +1634,73 @@ mod test {
         //   writer.GetSHA256().GetHex()
         // Note that Core writes the 0 length prefix when an empty vector is written.
         assert_eq!(
-            TapLeafHash::hash(&[0]).to_hex(),
+            TapLeafHash::hash(&[0]).to_string(),
             "ed1382037800c9dd938dd8854f1a8863bcdeb6705069b4b56a66ec22519d5829"
         );
         assert_eq!(
-            TapBranchHash::hash(&[0]).to_hex(),
+            TapNodeHash::hash(&[0]).to_string(),
             "92534b1960c7e6245af7d5fda2588db04aa6d646abc2b588dab2b69e5645eb1d"
         );
         assert_eq!(
-            TapTweakHash::hash(&[0]).to_hex(),
+            TapTweakHash::hash(&[0]).to_string(),
             "cd8737b5e6047fc3f16f03e8b9959e3440e1bdf6dd02f7bb899c352ad490ea1e"
         );
         assert_eq!(
-            TapSighashHash::hash(&[0]).to_hex(),
+            TapSighash::hash(&[0]).to_string(),
             "c2fd0de003889a09c4afcf676656a0d8a1fb706313ff7d509afb00c323c010cd"
         );
     }
 
-    fn _verify_tap_commitments(secp: &Secp256k1<VerifyOnly>, out_spk_hex: &str, script_hex : &str, control_block_hex: &str) {
+    fn _verify_tap_commitments(
+        secp: &Secp256k1<VerifyOnly>,
+        out_spk_hex: &str,
+        script_hex: &str,
+        control_block_hex: &str,
+    ) {
         let out_pk = XOnlyPublicKey::from_str(&out_spk_hex[4..]).unwrap();
         let out_pk = TweakedPublicKey::dangerous_assume_tweaked(out_pk);
-        let script = Script::from_hex(script_hex).unwrap();
-        let control_block = ControlBlock::from_slice(&Vec::<u8>::from_hex(control_block_hex).unwrap()).unwrap();
-        assert_eq!(control_block_hex, control_block.serialize().to_hex());
+        let script = ScriptBuf::from_hex(script_hex).unwrap();
+        let control_block =
+            ControlBlock::decode(&Vec::<u8>::from_hex(control_block_hex).unwrap()).unwrap();
+        assert_eq!(control_block_hex, control_block.serialize().to_lower_hex_string());
         assert!(control_block.verify_taproot_commitment(secp, out_pk.to_inner(), &script));
     }
 
     #[test]
     fn control_block_verify() {
-        let secp  = Secp256k1::verification_only();
-        // test vectors obtained from printing values in feature_taproot.py from bitcoin core
+        let secp = Secp256k1::verification_only();
+        // test vectors obtained from printing values in feature_taproot.py from Bitcoin Core
         _verify_tap_commitments(&secp, "51205dc8e62b15e0ebdf44751676be35ba32eed2e84608b290d4061bbff136cd7ba9", "6a", "c1a9d6f66cd4b25004f526bfa873e56942f98e8e492bd79ed6532b966104817c2bda584e7d32612381cf88edc1c02e28a296e807c16ad22f591ee113946e48a71e0641e660d1e5392fb79d64838c2b84faf04b7f5f283c9d8bf83e39e177b64372a0cd22eeab7e093873e851e247714eff762d8a30be699ba4456cfe6491b282e193a071350ae099005a5950d74f73ba13077a57bc478007fb0e4d1099ce9cf3d4");
         _verify_tap_commitments(&secp, "5120e208c869c40d8827101c5ad3238018de0f3f5183d77a0c53d18ac28ddcbcd8ad", "f4", "c0a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f40090ab1f4890d51115998242ebce636efb9ede1b516d9eb8952dc1068e0335306199aaf103cceb41d9bc37ec231aca89b984b5fd3c65977ce764d51033ac65adb4da14e029b1e154a85bfd9139e7aa2720b6070a4ceba8264ca61d5d3ac27aceb9ef4b54cd43c2d1fd5e11b5c2e93cf29b91ea3dc5b832201f02f7473a28c63246");
-        _verify_tap_commitments(&secp, "5120567666e7df90e0450bb608e17c01ed3fbcfa5355a5f8273e34e583bfaa70ce09", "203455139bf238a3067bd72ed77e0ab8db590330f55ed58dba7366b53bf4734279ac", "c1a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f400");
+        _verify_tap_commitments(
+            &secp,
+            "5120567666e7df90e0450bb608e17c01ed3fbcfa5355a5f8273e34e583bfaa70ce09",
+            "203455139bf238a3067bd72ed77e0ab8db590330f55ed58dba7366b53bf4734279ac",
+            "c1a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f400",
+        );
         _verify_tap_commitments(&secp, "5120580a19e47269414a55eb86d5d0c6c9b371455d9fd2154412a57dec840df99fe1", "6a", "bca0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f40042ba1bd1c63c03ccff60d4c4d53a653f87909eb3358e7fa45c9d805231fb08c933e1f4e0f9d17f591df1419df7d5b7eb5f744f404c5ef9ecdb1b89b18cafa3a816d8b5dba3205f9a9c05f866d91f40d2793a7586d502cb42f46c7a11f66ad4aa");
         _verify_tap_commitments(&secp, "5120228b94a4806254a38d6efa8a134c28ebc89546209559dfe40b2b0493bafacc5b", "6a50", "c0a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f4009c9aed3dfd11ab0e78bf87ef3bf296269dc4b0f7712140386d6980992bab4b45");
-        _verify_tap_commitments(&secp, "5120567666e7df90e0450bb608e17c01ed3fbcfa5355a5f8273e34e583bfaa70ce09", "203455139bf238a3067bd72ed77e0ab8db590330f55ed58dba7366b53bf4734279ac", "c1a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f400");
-        _verify_tap_commitments(&secp, "5120b0a79103c31fe51eea61d2873bad8a25a310da319d7e7a85f825fa7a00ea3f85", "203455139bf238a3067bd72ed77e0ab8db590330f55ed58dba7366b53bf4734279ad51", "c1a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f400");
+        _verify_tap_commitments(
+            &secp,
+            "5120567666e7df90e0450bb608e17c01ed3fbcfa5355a5f8273e34e583bfaa70ce09",
+            "203455139bf238a3067bd72ed77e0ab8db590330f55ed58dba7366b53bf4734279ac",
+            "c1a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f400",
+        );
+        _verify_tap_commitments(
+            &secp,
+            "5120b0a79103c31fe51eea61d2873bad8a25a310da319d7e7a85f825fa7a00ea3f85",
+            "203455139bf238a3067bd72ed77e0ab8db590330f55ed58dba7366b53bf4734279ad51",
+            "c1a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f400",
+        );
         _verify_tap_commitments(&secp, "5120f2f62e854a0012aeba78cd4ba4a0832447a5262d4c6eb4f1c95c7914b536fc6c", "6a86", "c1a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f4009ad3d30479f0689dbdf59a6b840d60ad485b2effbed1825a75ce19a44e460e09056f60ea686d79cfa4fb79f197b2e905ac857a983be4a5a41a4873e865aa950780c0237de279dc063e67deec46ef8e1bc351bf12c4d67a6d568001faf097e797e6ee620f53cfe0f8acaddf2063c39c3577853bb46d61ffcba5a024c3e1216837");
         _verify_tap_commitments(&secp, "51202a4772070b49bae68b44315032cdbf9c40c7c2f896781b32b931b73dbfb26d7e", "6af8", "c0a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f4006f183944a14618fc7fe9ceade0f58e43a19d3c3b179ea6c43c29616413b6971c99aaf103cceb41d9bc37ec231aca89b984b5fd3c65977ce764d51033ac65adb4c3462adec78cd04f3cc156bdadec50def99feae0dc6a23664e8a2b0d42d6ca9eb968dfdf46c23af642b2688351904e0a0630e71ffac5bcaba33b9b2c8a7495ec");
         _verify_tap_commitments(&secp, "5120a32b0b8cfafe0f0f8d5870030ba4d19a8725ad345cb3c8420f86ac4e0dff6207", "4c", "e8a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f400615da7ac8d078e5fc7f4690fc2127ba40f0f97cc070ade5b3a7919783d91ef3f13734aab908ae998e57848a01268fe8217d70bc3ee8ea8ceae158ae964a4b5f3af20b50d7019bf47fde210eee5c52f1cfe71cfca78f2d3e7c1fd828c80351525");
-        _verify_tap_commitments(&secp, "5120b0a79103c31fe51eea61d2873bad8a25a310da319d7e7a85f825fa7a00ea3f85", "203455139bf238a3067bd72ed77e0ab8db590330f55ed58dba7366b53bf4734279ad51", "c1a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f400");
+        _verify_tap_commitments(
+            &secp,
+            "5120b0a79103c31fe51eea61d2873bad8a25a310da319d7e7a85f825fa7a00ea3f85",
+            "203455139bf238a3067bd72ed77e0ab8db590330f55ed58dba7366b53bf4734279ad51",
+            "c1a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f400",
+        );
         _verify_tap_commitments(&secp, "51208678459f1fa0f80e9b89b8ffdcaf46a022bdf60aa45f1fed9a96145edf4ec400", "6a50", "c0a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f4001eff29e1a89e650076b8d3c56302881d09c9df215774ed99993aaed14acd6615");
         _verify_tap_commitments(&secp, "5120017316303aed02bcdec424c851c9eacbe192b013139bd9634c4e19b3475b06e1", "61", "02a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f40050462265ca552b23cbb4fe021b474313c8cb87d4a18b3f7bdbeb2b418279ba31fc6509d829cd42336f563363cb3538d78758e0876c71e13012eb2b656eb0edb051a2420a840d5c8c6c762abc7410af2c311f606b20ca2ace56a8139f84b1379a");
         _verify_tap_commitments(&secp, "5120896d4d5d2236e86c6e9320e86d1a7822e652907cbd508360e8c71aefc127c77d", "61", "14a0eb12e60a52614986c623cbb6621dcdba3a47e3be6b37e032b7a11c7b98f4001ab0e9d9a4858a0e69605fe9c5a42d739fbe26fa79650e7074f462b02645f7ea1c91802b298cd91e6b5af57c6a013d93397cd2ecbd5569382cc27becf44ff4fff8960b20f846160c159c58350f6b6072cf1b3daa5185b7a42524fb72cbc252576ae46732b8e31ac24bfa7d72f4c3713e8696f99d8ac6c07e4c820a03f249f144");
@@ -1238,16 +1721,21 @@ mod test {
     #[test]
     fn build_huffman_tree() {
         let secp = Secp256k1::verification_only();
-        let internal_key = UntweakedPublicKey::from_str("93c7378d96518a75448821c4f7c8f4bae7ce60f804d03d1f0628dd5dd0f5de51").unwrap();
+        let internal_key = UntweakedPublicKey::from_str(
+            "93c7378d96518a75448821c4f7c8f4bae7ce60f804d03d1f0628dd5dd0f5de51",
+        )
+            .unwrap();
 
         let script_weights = vec![
-            (10, Script::from_hex("51").unwrap()), // semantics of script don't matter for this test
-            (20, Script::from_hex("52").unwrap()),
-            (20, Script::from_hex("53").unwrap()),
-            (30, Script::from_hex("54").unwrap()),
-            (19, Script::from_hex("55").unwrap()),
+            (10, ScriptBuf::from_hex("51").unwrap()), // semantics of script don't matter for this test
+            (20, ScriptBuf::from_hex("52").unwrap()),
+            (20, ScriptBuf::from_hex("53").unwrap()),
+            (30, ScriptBuf::from_hex("54").unwrap()),
+            (19, ScriptBuf::from_hex("55").unwrap()),
         ];
-        let tree_info = TaprootSpendInfo::with_huffman_tree(&secp, internal_key, script_weights.clone()).unwrap();
+        let tree_info =
+            TaprootSpendInfo::with_huffman_tree(&secp, internal_key, script_weights.clone())
+                .unwrap();
 
         /* The resulting tree should put the scripts into a tree similar
          * to the following:
@@ -1259,12 +1747,12 @@ mod test {
          *   3            55 51
          */
 
-        for (script, length) in vec![("51", 3), ("52", 2), ("53", 2), ("54", 2), ("55", 3)] {
+        for (script, length) in [("51", 3), ("52", 2), ("53", 2), ("54", 2), ("55", 3)].iter() {
             assert_eq!(
-                length,
+                *length,
                 tree_info
                     .script_map
-                    .get(&(Script::from_hex(script).unwrap(), LeafVersion::TapScript))
+                    .get(&(ScriptBuf::from_hex(script).unwrap(), LeafVersion::TapScript))
                     .expect("Present Key")
                     .iter()
                     .next()
@@ -1281,14 +1769,21 @@ mod test {
         for (_weights, script) in script_weights {
             let ver_script = (script, LeafVersion::TapScript);
             let ctrl_block = tree_info.control_block(&ver_script).unwrap();
-            assert!(ctrl_block.verify_taproot_commitment(&secp, output_key.to_inner(), &ver_script.0))
+            assert!(ctrl_block.verify_taproot_commitment(
+                &secp,
+                output_key.to_inner(),
+                &ver_script.0,
+            ))
         }
     }
 
     #[test]
     fn taptree_builder() {
         let secp = Secp256k1::verification_only();
-        let internal_key = UntweakedPublicKey::from_str("93c7378d96518a75448821c4f7c8f4bae7ce60f804d03d1f0628dd5dd0f5de51").unwrap();
+        let internal_key = UntweakedPublicKey::from_str(
+            "93c7378d96518a75448821c4f7c8f4bae7ce60f804d03d1f0628dd5dd0f5de51",
+        )
+            .unwrap();
 
         let builder = TaprootBuilder::new();
         // Create a tree as shown below
@@ -1300,46 +1795,114 @@ mod test {
         //                                   /  \    /  \
         //                                  A    B  C  / \
         //                                            D   E
-        let a = Script::from_hex("51").unwrap();
-        let b = Script::from_hex("52").unwrap();
-        let c = Script::from_hex("53").unwrap();
-        let d = Script::from_hex("54").unwrap();
-        let e = Script::from_hex("55").unwrap();
+        let a = ScriptBuf::from_hex("51").unwrap();
+        let b = ScriptBuf::from_hex("52").unwrap();
+        let c = ScriptBuf::from_hex("53").unwrap();
+        let d = ScriptBuf::from_hex("54").unwrap();
+        let e = ScriptBuf::from_hex("55").unwrap();
         let builder = builder.add_leaf(2, a.clone()).unwrap();
         let builder = builder.add_leaf(2, b.clone()).unwrap();
         let builder = builder.add_leaf(2, c.clone()).unwrap();
         let builder = builder.add_leaf(3, d.clone()).unwrap();
+
+        // Trying to finalize an incomplete tree returns the Err(builder)
+        let builder = builder.finalize(&secp, internal_key).unwrap_err();
         let builder = builder.add_leaf(3, e.clone()).unwrap();
 
+        #[cfg(feature = "serde")]
+        {
+            let tree = TapTree::try_from(builder.clone()).unwrap();
+            // test roundtrip serialization with serde_test
+            #[rustfmt::skip]
+            assert_tokens(&tree.readable(), &[
+                Token::Seq { len: Some(10) },
+                Token::U64(2), Token::TupleVariant { name: "TapLeaf", variant: "Script", len: 2 }, Token::Str("51"), Token::U8(192), Token::TupleVariantEnd,
+                Token::U64(2), Token::TupleVariant { name: "TapLeaf", variant: "Script", len: 2 }, Token::Str("52"), Token::U8(192), Token::TupleVariantEnd,
+                Token::U64(3), Token::TupleVariant { name: "TapLeaf", variant: "Script", len: 2 }, Token::Str("55"), Token::U8(192), Token::TupleVariantEnd,
+                Token::U64(3), Token::TupleVariant { name: "TapLeaf", variant: "Script", len: 2 }, Token::Str("54"), Token::U8(192), Token::TupleVariantEnd,
+                Token::U64(2), Token::TupleVariant { name: "TapLeaf", variant: "Script", len: 2 }, Token::Str("53"), Token::U8(192), Token::TupleVariantEnd,
+                Token::SeqEnd,
+            ], );
+
+            let node_info = TapTree::try_from(builder.clone()).unwrap().into_node_info();
+            // test roundtrip serialization with serde_test
+            #[rustfmt::skip]
+            assert_tokens(&node_info.readable(), &[
+                Token::Seq { len: Some(10) },
+                Token::U64(2), Token::TupleVariant { name: "TapLeaf", variant: "Script", len: 2 }, Token::Str("51"), Token::U8(192), Token::TupleVariantEnd,
+                Token::U64(2), Token::TupleVariant { name: "TapLeaf", variant: "Script", len: 2 }, Token::Str("52"), Token::U8(192), Token::TupleVariantEnd,
+                Token::U64(3), Token::TupleVariant { name: "TapLeaf", variant: "Script", len: 2 }, Token::Str("55"), Token::U8(192), Token::TupleVariantEnd,
+                Token::U64(3), Token::TupleVariant { name: "TapLeaf", variant: "Script", len: 2 }, Token::Str("54"), Token::U8(192), Token::TupleVariantEnd,
+                Token::U64(2), Token::TupleVariant { name: "TapLeaf", variant: "Script", len: 2 }, Token::Str("53"), Token::U8(192), Token::TupleVariantEnd,
+                Token::SeqEnd,
+            ], );
+        }
+
         let tree_info = builder.finalize(&secp, internal_key).unwrap();
         let output_key = tree_info.output_key();
 
         for script in vec![a, b, c, d, e] {
             let ver_script = (script, LeafVersion::TapScript);
             let ctrl_block = tree_info.control_block(&ver_script).unwrap();
-            assert!(ctrl_block.verify_taproot_commitment(&secp, output_key.to_inner(), &ver_script.0))
+            assert!(ctrl_block.verify_taproot_commitment(
+                &secp,
+                output_key.to_inner(),
+                &ver_script.0,
+            ))
         }
     }
 
+    #[test]
+    #[cfg(feature = "serde")]
+    fn test_leaf_version_serde() {
+        let leaf_version = LeafVersion::TapScript;
+        // use serde_test to test serialization and deserialization
+        assert_tokens(&leaf_version, &[Token::U8(192)]);
+
+        let json = serde_json::to_string(&leaf_version).unwrap();
+        let leaf_version2 = serde_json::from_str(&json).unwrap();
+        assert_eq!(leaf_version, leaf_version2);
+    }
+
+    #[test]
+    #[cfg(feature = "serde")]
+    fn test_merkle_branch_serde() {
+        let dummy_hash = hex!("03ba2a4dcd914fed29a1c630c7e811271b081a0e2f2f52cf1c197583dfd46c1b");
+        let hash1 = TapNodeHash::from_slice(&dummy_hash).unwrap();
+        let dummy_hash = hex!("8d79dedc2fa0b55167b5d28c61dbad9ce1191a433f3a1a6c8ee291631b2c94c9");
+        let hash2 = TapNodeHash::from_slice(&dummy_hash).unwrap();
+        let merkle_branch = TaprootMerkleBranch::from_collection(vec![hash1, hash2]).unwrap();
+        // use serde_test to test serialization and deserialization
+        serde_test::assert_tokens(
+            &merkle_branch.readable(),
+            &[
+                Token::Seq { len: Some(2) },
+                Token::Str("03ba2a4dcd914fed29a1c630c7e811271b081a0e2f2f52cf1c197583dfd46c1b"),
+                Token::Str("8d79dedc2fa0b55167b5d28c61dbad9ce1191a433f3a1a6c8ee291631b2c94c9"),
+                Token::SeqEnd,
+            ],
+        );
+    }
+
     #[ignore]
     #[test]
     fn bip_341_tests() {
-
         fn process_script_trees(
             v: &serde_json::Value,
             mut builder: TaprootBuilder,
-            leaves: &mut Vec<(Script, LeafVersion)>,
+            leaves: &mut Vec<(ScriptBuf, LeafVersion)>,
             depth: u8,
         ) -> TaprootBuilder {
             if v.is_null() {
                 // nothing to push
             } else if v.is_array() {
                 for leaf in v.as_array().unwrap() {
-                    builder =  process_script_trees(leaf, builder, leaves, depth + 1);
+                    builder = process_script_trees(leaf, builder, leaves, depth + 1);
                 }
             } else {
-                let script = Script::from_str(v["script"].as_str().unwrap()).unwrap();
-                let ver = LeafVersion::from_consensus(v["leafVersion"].as_u64().unwrap() as u8).unwrap();
+                let script = ScriptBuf::from_hex(v["script"].as_str().unwrap()).unwrap();
+                let ver =
+                    LeafVersion::from_consensus(v["leafVersion"].as_u64().unwrap() as u8).unwrap();
                 leaves.push((script.clone(), ver));
                 builder = builder.add_leaf_with_ver(depth, script, ver).unwrap();
             }
@@ -1352,38 +1915,52 @@ mod test {
         let secp = &secp256k1::Secp256k1::verification_only();
 
         for arr in data["scriptPubKey"].as_array().unwrap() {
-            let internal_key = XOnlyPublicKey::from_str(arr["given"]["internalPubkey"].as_str().unwrap()).unwrap();
+            let internal_key =
+                XOnlyPublicKey::from_str(arr["given"]["internalPubkey"].as_str().unwrap()).unwrap();
             // process the tree
             let script_tree = &arr["given"]["scriptTree"];
             let mut merkle_root = None;
             if script_tree.is_null() {
                 assert!(arr["intermediary"]["merkleRoot"].is_null());
             } else {
-                merkle_root = Some(TapBranchHash::from_str(&arr["intermediary"]["merkleRoot"].as_str().unwrap()).unwrap());
+                merkle_root = Some(
+                    TapNodeHash::from_str(arr["intermediary"]["merkleRoot"].as_str().unwrap())
+                        .unwrap(),
+                );
                 let leaf_hashes = arr["intermediary"]["leafHashes"].as_array().unwrap();
                 let ctrl_blks = arr["expected"]["scriptPathControlBlocks"].as_array().unwrap();
                 let mut builder = TaprootBuilder::new();
                 let mut leaves = vec![];
-                builder = process_script_trees(&script_tree, builder, &mut leaves, 0);
+                builder = process_script_trees(script_tree, builder, &mut leaves, 0);
                 let spend_info = builder.finalize(secp, internal_key).unwrap();
                 for (i, script_ver) in leaves.iter().enumerate() {
                     let expected_leaf_hash = leaf_hashes[i].as_str().unwrap();
-                    let expected_ctrl_blk = ControlBlock::from_slice(&Vec::<u8>::from_hex(ctrl_blks[i].as_str().unwrap()).unwrap()).unwrap();
+                    let expected_ctrl_blk = ControlBlock::decode(
+                        &Vec::<u8>::from_hex(ctrl_blks[i].as_str().unwrap()).unwrap(),
+                    )
+                        .unwrap();
 
                     let leaf_hash = TapLeafHash::from_script(&script_ver.0, script_ver.1);
                     let ctrl_blk = spend_info.control_block(script_ver).unwrap();
-                    assert_eq!(leaf_hash.to_hex(), expected_leaf_hash);
+                    assert_eq!(leaf_hash.to_string(), expected_leaf_hash);
                     assert_eq!(ctrl_blk, expected_ctrl_blk);
                 }
             }
-            let expected_output_key = XOnlyPublicKey::from_str(arr["intermediary"]["tweakedPubkey"].as_str().unwrap()).unwrap();
-            let expected_tweak = TapTweakHash::from_str(arr["intermediary"]["tweak"].as_str().unwrap()).unwrap();
-            let expected_spk = Script::from_str(arr["expected"]["scriptPubKey"].as_str().unwrap()).unwrap();
-            let expected_addr = Address::from_str(arr["expected"]["bip350Address"].as_str().unwrap()).unwrap();
+            let expected_output_key =
+                XOnlyPublicKey::from_str(arr["intermediary"]["tweakedPubkey"].as_str().unwrap())
+                    .unwrap();
+            let expected_tweak =
+                TapTweakHash::from_str(arr["intermediary"]["tweak"].as_str().unwrap()).unwrap();
+            let expected_spk =
+                ScriptBuf::from_hex(arr["expected"]["scriptPubKey"].as_str().unwrap()).unwrap();
+            let expected_addr =
+                Address::from_str(arr["expected"]["bip350Address"].as_str().unwrap())
+                    .unwrap()
+                    .assume_checked();
 
             let tweak = TapTweakHash::from_key_and_tweak(internal_key, merkle_root);
-            let (output_key, _parity) = internal_key.tap_tweak(&secp, merkle_root);
-            let addr = Address::p2tr(&secp, internal_key, merkle_root, Network::Dash);
+            let (output_key, _parity) = internal_key.tap_tweak(secp, merkle_root);
+            let addr = Address::p2tr(secp, internal_key, merkle_root, Network::Dash);
             let spk = addr.script_pubkey();
 
             assert_eq!(expected_output_key, output_key.to_inner());
@@ -1394,7 +1971,12 @@ mod test {
     }
 
     fn bip_341_read_json() -> serde_json::Value {
-        let json_str = include_str!("../../test_data/bip341_tests.json");
+        let json_str = include_str!("../tests/data/bip341_tests.json");
         serde_json::from_str(json_str).expect("JSON was not well-formatted")
     }
+
+    #[test]
+    fn popo() {
+        //
+    }
 }
diff --git a/src/test_macros.rs b/dash/src/test_macros.rs
similarity index 100%
rename from src/test_macros.rs
rename to dash/src/test_macros.rs
diff --git a/dash/src/types/mod.rs b/dash/src/types/mod.rs
new file mode 100644
index 000000000..4e7851cdc
--- /dev/null
+++ b/dash/src/types/mod.rs
@@ -0,0 +1,27 @@
+// use std::convert::{TryFrom, TryInto};
+// use hashes::hex::FromHex;
+// use consensus::encode;
+// use crate::Error;
+// #[cfg(feature = "serde")]
+// use serde::{Serialize, Deserialize};
+// #[cfg(feature = "bincode")]
+// use bincode::{Encode, Decode};
+//
+// pub type ProTxHash = CryptoHash;
+//
+// pub type QuorumHash = CryptoHash;
+//
+// #[derive(Clone, PartialEq, Eq, Debug, Ord, PartialOrd)]
+// #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+// #[cfg_attr(feature = "bincode", derive(Encode, Decode))]
+// pub struct CryptoHash(pub [u8; 32]);
+//
+// impl TryFrom<&str> for CryptoHash {
+//     type Error = Error;
+//
+//     fn try_from(value: &str) -> Result<Self, Self::Error> {
+//         let vec = Vec::from_hex(value).map_err(|e|Error::Encode(encode::Error::Hex(e)))?;
+//         let vec_len = vec.len();
+//         Ok(CryptoHash(vec.try_into().map_err(|_| encode::Error::InvalidVectorSize { expected: 32, actual: vec_len })?))
+//     }
+// }
diff --git a/dash/src/util/mod.rs b/dash/src/util/mod.rs
new file mode 100644
index 000000000..7f73179d7
--- /dev/null
+++ b/dash/src/util/mod.rs
@@ -0,0 +1,59 @@
+// Written in 2014 by Andrew Poelstra <apoelstra@wpsoftware.net>
+// SPDX-License-Identifier: CC0-1.0
+
+//! Utility functions.
+//!
+//! Functions needed by all parts of the Bitcoin library.
+//!
+
+/// The `misc` module was moved and re-named to `sign_message`.
+pub mod misc {
+    use crate::prelude::*;
+
+    /// Search for `needle` in the vector `haystack` and remove every
+    /// instance of it, returning the number of instances removed.
+    /// Loops through the vector opcode by opcode, skipping pushed data.
+    // For why we deprecated see: https://github.com/rust-bitcoin/rust-bitcoin/pull/1259#discussion_r968613736
+    #[deprecated(since = "0.30.0", note = "No longer supported")]
+    pub fn script_find_and_remove(haystack: &mut Vec<u8>, needle: &[u8]) -> usize {
+        use crate::blockdata::opcodes;
+
+        if needle.len() > haystack.len() {
+            return 0;
+        }
+        if needle.is_empty() {
+            return 0;
+        }
+
+        let mut top = haystack.len() - needle.len();
+        let mut n_deleted = 0;
+
+        let mut i = 0;
+        while i <= top {
+            if &haystack[i..(i + needle.len())] == needle {
+                for j in i..top {
+                    haystack.swap(j + needle.len(), j);
+                }
+                n_deleted += 1;
+                // This is ugly but prevents infinite loop in case of overflow
+                let overflow = top < needle.len();
+                top = top.wrapping_sub(needle.len());
+                if overflow {
+                    break;
+                }
+            } else {
+                i += match opcodes::All::from((*haystack)[i])
+                    .classify(opcodes::ClassifyContext::Legacy)
+                {
+                    opcodes::Class::PushBytes(n) => n as usize + 1,
+                    opcodes::Class::Ordinary(opcodes::Ordinary::OP_PUSHDATA1) => 2,
+                    opcodes::Class::Ordinary(opcodes::Ordinary::OP_PUSHDATA2) => 3,
+                    opcodes::Class::Ordinary(opcodes::Ordinary::OP_PUSHDATA4) => 5,
+                    _ => 1,
+                };
+            }
+        }
+        haystack.truncate(top.wrapping_add(needle.len()));
+        n_deleted
+    }
+}
diff --git a/dash/tests/data/README.md b/dash/tests/data/README.md
new file mode 100644
index 000000000..70ed7a4ef
--- /dev/null
+++ b/dash/tests/data/README.md
@@ -0,0 +1,4 @@
+Test vector data
+================
+
+This file contains data (hex strings) taken from BIP test vectors.
diff --git a/test_data/bip341_tests.json b/dash/tests/data/bip341_tests.json
similarity index 100%
rename from test_data/bip341_tests.json
rename to dash/tests/data/bip341_tests.json
diff --git a/dash/tests/data/block_13b8a.hex b/dash/tests/data/block_13b8a.hex
new file mode 100644
index 000000000..6e83915b0
--- /dev/null
+++ b/dash/tests/data/block_13b8a.hex
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/test_data/blockfilters.json b/dash/tests/data/blockfilters.json
similarity index 100%
rename from test_data/blockfilters.json
rename to dash/tests/data/blockfilters.json
diff --git a/dash/tests/data/combine_psbt_hex b/dash/tests/data/combine_psbt_hex
new file mode 100644
index 000000000..ed4300239
--- /dev/null
+++ b/dash/tests/data/combine_psbt_hex
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/dash/tests/data/create_psbt_hex b/dash/tests/data/create_psbt_hex
new file mode 100644
index 000000000..b5ef8d5ed
--- /dev/null
+++ b/dash/tests/data/create_psbt_hex
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/dash/tests/data/extract_tx_hex b/dash/tests/data/extract_tx_hex
new file mode 100644
index 000000000..4b7ec925d
--- /dev/null
+++ b/dash/tests/data/extract_tx_hex
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/dash/tests/data/finalize_psbt_hex b/dash/tests/data/finalize_psbt_hex
new file mode 100644
index 000000000..53e480b59
--- /dev/null
+++ b/dash/tests/data/finalize_psbt_hex
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/dash/tests/data/huge_witness.hex b/dash/tests/data/huge_witness.hex
new file mode 100644
index 000000000..34aec3a8f
--- /dev/null
+++ b/dash/tests/data/huge_witness.hex
@@ -0,0 +1 @@
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diff --git a/dash/tests/data/legacy_sighash.json b/dash/tests/data/legacy_sighash.json
new file mode 100644
index 000000000..ea7d9fef4
--- /dev/null
+++ b/dash/tests/data/legacy_sighash.json
@@ -0,0 +1,292 @@
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+    ["a0eb6dc402994e493c787b45d1f946d267b09c596c5edde043e620ce3d59e95b2b5b93d43002000000096a5252526aac63ab6555694287a279e29ee491c177a801cd685b8744a2eab83824255a3bcd08fc0e3ea13fb8820000000009abab6365ab52ab0063ffffffff029e424a040000000008acab53ab516a636a23830f0400000000016adf49c1f9", "ac0065ac6500005252", 1, 669294500, "e05e3d383631a7ed1b78210c13c2eb26564e5577db7ddfcea2583c7c014091d4"],
+    ["6e67c0d3027701ef71082204c85ed63c700ef1400c65efb62ce3580d187fb348376a23e9710200000001655b91369d3155ba916a0bc6fe4f5d94cad461d899bb8aaac3699a755838bfc229d6828920010000000765536353526a52ffffffff04c0c792000000000005650052535372f79e000000000001527fc0ee010000000005ac5300ab65d1b3e902000000000251aba942b278", "6a5151", 0, 1741407676, "e657e2c8ec4ebc769ddd3198a83267b47d4f2a419fc737e813812acefad92ff7"],
+    ["8f53639901f1d643e01fc631f632b7a16e831d846a0184cdcda289b8fa7767f0c292eb221a00000000046a53abacffffffff037a2daa01000000000553ac6a6a51eac349020000000005ac526552638421b3040000000007006a005100ac63048a1492", "ac65", 0, 1033685559, "da86c260d42a692358f46893d6f91563985d86eeb9ea9e21cd38c2d8ffcfcc4d"],
+    ["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", "005165", 1, 1035865506, "fe1dc9e8554deecf8f50c417c670b839cc9d650722ebaaf36572418756075d58"],
+    ["cf781855040a755f5ba85eef93837236b34a5d3daeb2dbbdcf58bb811828d806ed05754ab8010000000351ac53ffffffffda1e264727cf55c67f06ebcc56dfe7fa12ac2a994fecd0180ce09ee15c480f7d00000000096351516a51acac00ab53dd49ff9f334befd6d6f87f1a832cddfd826a90b78fd8cf19a52cb8287788af94e939d6020000000700525251ac526310d54a7e8900ed633f0f6f0841145aae7ee0cbbb1e2a0cae724ee4558dbabfdc58ba6855010000000552536a53abfd1b101102c51f910500000000096300656a525252656a300bee010000000009ac52005263635151abe19235c9", "53005365", 2, 1422854188, "d5981bd4467817c1330da72ddb8760d6c2556cd809264b2d85e6d274609fc3a3"]
+]
diff --git a/dash/tests/data/lex_combine_psbt_hex b/dash/tests/data/lex_combine_psbt_hex
new file mode 100644
index 000000000..9ee710b6a
--- /dev/null
+++ b/dash/tests/data/lex_combine_psbt_hex
@@ -0,0 +1 @@
+70736274ff01003f0200000001ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff0000000000ffffffff010000000000000000036a0100000000000af00102030405060708090f0102030405060708090a0b0c0d0e0f0af00102030405060708100f0102030405060708090a0b0c0d0e0f000af00102030405060708090f0102030405060708090a0b0c0d0e0f0af00102030405060708100f0102030405060708090a0b0c0d0e0f000af00102030405060708090f0102030405060708090a0b0c0d0e0f0af00102030405060708100f0102030405060708090a0b0c0d0e0f00
\ No newline at end of file
diff --git a/dash/tests/data/lex_psbt_1_hex b/dash/tests/data/lex_psbt_1_hex
new file mode 100644
index 000000000..a125c5298
--- /dev/null
+++ b/dash/tests/data/lex_psbt_1_hex
@@ -0,0 +1 @@
+70736274ff01003f0200000001ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff0000000000ffffffff010000000000000000036a0100000000000af00102030405060708090f0102030405060708090a0b0c0d0e0f000af00102030405060708090f0102030405060708090a0b0c0d0e0f000af00102030405060708090f0102030405060708090a0b0c0d0e0f00
\ No newline at end of file
diff --git a/dash/tests/data/lex_psbt_2_hex b/dash/tests/data/lex_psbt_2_hex
new file mode 100644
index 000000000..766c7eee1
--- /dev/null
+++ b/dash/tests/data/lex_psbt_2_hex
@@ -0,0 +1 @@
+70736274ff01003f0200000001ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff0000000000ffffffff010000000000000000036a0100000000000af00102030405060708100f0102030405060708090a0b0c0d0e0f000af00102030405060708100f0102030405060708090a0b0c0d0e0f000af00102030405060708100f0102030405060708090a0b0c0d0e0f00
\ No newline at end of file
diff --git a/test_data/mainnet_block_000000000000000000000c835b2adcaedc20fdf6ee440009c249452c726dafae.raw b/dash/tests/data/mainnet_block_000000000000000000000c835b2adcaedc20fdf6ee440009c249452c726dafae.raw
similarity index 100%
rename from test_data/mainnet_block_000000000000000000000c835b2adcaedc20fdf6ee440009c249452c726dafae.raw
rename to dash/tests/data/mainnet_block_000000000000000000000c835b2adcaedc20fdf6ee440009c249452c726dafae.raw
diff --git a/dash/tests/data/merkle_block.hex b/dash/tests/data/merkle_block.hex
new file mode 100644
index 000000000..c9a32c9a5
--- /dev/null
+++ b/dash/tests/data/merkle_block.hex
@@ -0,0 +1 @@
+0100000090f0a9f110702f808219ebea1173056042a714bad51b916cb6800000000000005275289558f51c9966699404ae2294730c3c9f9bda53523ce50e9b95e558da2fdb261b4d4c86041b1ab1bf930900000005fac7708a6e81b2a986dea60db2663840ed141130848162eb1bd1dee54f309a1b2ee1e12587e497ada70d9bd10d31e83f0a924825b96cb8d04e8936d793fb60db7ad8b910d0c7ba2369bc7f18bb53d80e1869ba2c32274996cebe1ae264bc0e2289189ff0316cdc10511da71da757e553cada9f3b5b1434f3923673adb57d83caac392c38af156d6fc30b55fad4112df2b95531e68114e9ad10011e72f7b7cfdb025700
\ No newline at end of file
diff --git a/dash/tests/data/previous_tx_0_hex b/dash/tests/data/previous_tx_0_hex
new file mode 100644
index 000000000..ce2089453
--- /dev/null
+++ b/dash/tests/data/previous_tx_0_hex
@@ -0,0 +1 @@
+0200000000010158e87a21b56daf0c23be8e7070456c336f7cbaa5c8757924f545887bb2abdd7501000000171600145f275f436b09a8cc9a2eb2a2f528485c68a56323feffffff02d8231f1b0100000017a914aed962d6654f9a2b36608eb9d64d2b260db4f1118700c2eb0b0000000017a914b7f5faf40e3d40a5a459b1db3535f2b72fa921e88702483045022100a22edcc6e5bc511af4cc4ae0de0fcd75c7e04d8c1c3a8aa9d820ed4b967384ec02200642963597b9b1bc22c75e9f3e117284a962188bf5e8a74c895089046a20ad770121035509a48eb623e10aace8bfd0212fdb8a8e5af3c94b0b133b95e114cab89e4f7965000000
\ No newline at end of file
diff --git a/dash/tests/data/previous_tx_1_hex b/dash/tests/data/previous_tx_1_hex
new file mode 100644
index 000000000..9297523e3
--- /dev/null
+++ b/dash/tests/data/previous_tx_1_hex
@@ -0,0 +1 @@
+0200000001aad73931018bd25f84ae400b68848be09db706eac2ac18298babee71ab656f8b0000000048473044022058f6fc7c6a33e1b31548d481c826c015bd30135aad42cd67790dab66d2ad243b02204a1ced2604c6735b6393e5b41691dd78b00f0c5942fb9f751856faa938157dba01feffffff0280f0fa020000000017a9140fb9463421696b82c833af241c78c17ddbde493487d0f20a270100000017a91429ca74f8a08f81999428185c97b5d852e4063f618765000000
\ No newline at end of file
diff --git a/test_data/psbt1.hex b/dash/tests/data/psbt1.hex
similarity index 100%
rename from test_data/psbt1.hex
rename to dash/tests/data/psbt1.hex
diff --git a/test_data/psbt2.hex b/dash/tests/data/psbt2.hex
similarity index 100%
rename from test_data/psbt2.hex
rename to dash/tests/data/psbt2.hex
diff --git a/test_data/psbt_combined.hex b/dash/tests/data/psbt_combined.hex
similarity index 100%
rename from test_data/psbt_combined.hex
rename to dash/tests/data/psbt_combined.hex
diff --git a/dash/tests/data/serde/README.md b/dash/tests/data/serde/README.md
new file mode 100644
index 000000000..a12793ba0
--- /dev/null
+++ b/dash/tests/data/serde/README.md
@@ -0,0 +1,12 @@
+Serialization input/output
+==========================
+
+Files here contain hex strings and binary data representing types used for
+regression testing.
+
+- *_hex: consensus encoded types represented as hex strings
+- *_ser: consensus encoded types represented as binary data
+- *_bincode: types serialized with serde as bincode
+
+We consensus deserialize, serde serialize, then check against the expected data
+to verify no serde regressions have been introduced.
diff --git a/dash/tests/data/serde/absolute_lock_time_blocks_bincode b/dash/tests/data/serde/absolute_lock_time_blocks_bincode
new file mode 100644
index 000000000..ab7c85f50
Binary files /dev/null and b/dash/tests/data/serde/absolute_lock_time_blocks_bincode differ
diff --git a/dash/tests/data/serde/absolute_lock_time_seconds_bincode b/dash/tests/data/serde/absolute_lock_time_seconds_bincode
new file mode 100644
index 000000000..0d59b0c9f
--- /dev/null
+++ b/dash/tests/data/serde/absolute_lock_time_seconds_bincode
@@ -0,0 +1 @@
+PÉb
\ No newline at end of file
diff --git a/dash/tests/data/serde/address_bincode b/dash/tests/data/serde/address_bincode
new file mode 100644
index 000000000..2f63574e5
Binary files /dev/null and b/dash/tests/data/serde/address_bincode differ
diff --git a/dash/tests/data/serde/block_bincode b/dash/tests/data/serde/block_bincode
new file mode 100644
index 000000000..0bd56c8d2
Binary files /dev/null and b/dash/tests/data/serde/block_bincode differ
diff --git a/dash/tests/data/serde/child_number_bincode b/dash/tests/data/serde/child_number_bincode
new file mode 100644
index 000000000..c9902e4a9
--- /dev/null
+++ b/dash/tests/data/serde/child_number_bincode
@@ -0,0 +1 @@
+ï¾­Þ
\ No newline at end of file
diff --git a/dash/tests/data/serde/control_block_bincode b/dash/tests/data/serde/control_block_bincode
new file mode 100644
index 000000000..02f9b8ca7
Binary files /dev/null and b/dash/tests/data/serde/control_block_bincode differ
diff --git a/dash/tests/data/serde/control_block_hex b/dash/tests/data/serde/control_block_hex
new file mode 100644
index 000000000..b1ddcda5e
--- /dev/null
+++ b/dash/tests/data/serde/control_block_hex
@@ -0,0 +1 @@
+c1a9d6f66cd4b25004f526bfa873e56942f98e8e492bd79ed6532b966104817c2bda584e7d32612381cf88edc1c02e28a296e807c16ad22f591ee113946e48a71e0641e660d1e5392fb79d64838c2b84faf04b7f5f283c9d8bf83e39e177b64372a0cd22eeab7e093873e851e247714eff762d8a30be699ba4456cfe6491b282e193a071350ae099005a5950d74f73ba13077a57bc478007fb0e4d1099ce9cf3d4
diff --git a/dash/tests/data/serde/ecdsa_sig_bincode b/dash/tests/data/serde/ecdsa_sig_bincode
new file mode 100644
index 000000000..3136dc701
Binary files /dev/null and b/dash/tests/data/serde/ecdsa_sig_bincode differ
diff --git a/dash/tests/data/serde/ecdsa_sig_hex b/dash/tests/data/serde/ecdsa_sig_hex
new file mode 100644
index 000000000..a435e3dfc
--- /dev/null
+++ b/dash/tests/data/serde/ecdsa_sig_hex
@@ -0,0 +1 @@
+3046022100839c1fbc5304de944f697c9f4b1d01d1faeba32d751c0f7acb21ac8a0f436a72022100e89bd46bb3a5a62adc679f659b7ce876d83ee297c7a5587b2011c4fcc72eab45
diff --git a/dash/tests/data/serde/extended_priv_key b/dash/tests/data/serde/extended_priv_key
new file mode 100644
index 000000000..7e84345f6
--- /dev/null
+++ b/dash/tests/data/serde/extended_priv_key
@@ -0,0 +1 @@
+xprv9s21ZrQH143K3QTDL4LXw2F7HEK3wJUD2nW2nRk4stbPy6cq3jPPqjiChkVvvNKmPGJxWUtg6LnF5kejMRNNU3TGtRBeJgk33yuGBxrMPHi
diff --git a/dash/tests/data/serde/extended_priv_key_bincode b/dash/tests/data/serde/extended_priv_key_bincode
new file mode 100644
index 000000000..a4331025e
Binary files /dev/null and b/dash/tests/data/serde/extended_priv_key_bincode differ
diff --git a/dash/tests/data/serde/extended_pub_key b/dash/tests/data/serde/extended_pub_key
new file mode 100644
index 000000000..da2268765
--- /dev/null
+++ b/dash/tests/data/serde/extended_pub_key
@@ -0,0 +1 @@
+xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ29ESFjqJoCu1Rupje8YtGqsefD265TMg7usUDFdp6W1EGMcet8
diff --git a/dash/tests/data/serde/extended_pub_key_bincode b/dash/tests/data/serde/extended_pub_key_bincode
new file mode 100644
index 000000000..096623fda
Binary files /dev/null and b/dash/tests/data/serde/extended_pub_key_bincode differ
diff --git a/dash/tests/data/serde/private_key_bincode b/dash/tests/data/serde/private_key_bincode
new file mode 100644
index 000000000..827f5d7ff
Binary files /dev/null and b/dash/tests/data/serde/private_key_bincode differ
diff --git a/dash/tests/data/serde/proprietary_key_bincode b/dash/tests/data/serde/proprietary_key_bincode
new file mode 100644
index 000000000..243107756
Binary files /dev/null and b/dash/tests/data/serde/proprietary_key_bincode differ
diff --git a/dash/tests/data/serde/psbt_bincode b/dash/tests/data/serde/psbt_bincode
new file mode 100644
index 000000000..e7293c1ad
Binary files /dev/null and b/dash/tests/data/serde/psbt_bincode differ
diff --git a/dash/tests/data/serde/public_key_bincode b/dash/tests/data/serde/public_key_bincode
new file mode 100644
index 000000000..472a282c1
Binary files /dev/null and b/dash/tests/data/serde/public_key_bincode differ
diff --git a/dash/tests/data/serde/public_key_hex b/dash/tests/data/serde/public_key_hex
new file mode 100644
index 000000000..4c6541bcd
--- /dev/null
+++ b/dash/tests/data/serde/public_key_hex
@@ -0,0 +1 @@
+042e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af191923a2964c177f5b5923ae500fca49e99492d534aa3759d6b25a8bc971b133
diff --git a/dash/tests/data/serde/raw_pair_bincode b/dash/tests/data/serde/raw_pair_bincode
new file mode 100644
index 000000000..415afa7dc
Binary files /dev/null and b/dash/tests/data/serde/raw_pair_bincode differ
diff --git a/dash/tests/data/serde/relative_lock_time_blocks_bincode b/dash/tests/data/serde/relative_lock_time_blocks_bincode
new file mode 100644
index 000000000..4eb84bb45
Binary files /dev/null and b/dash/tests/data/serde/relative_lock_time_blocks_bincode differ
diff --git a/dash/tests/data/serde/relative_lock_time_seconds_bincode b/dash/tests/data/serde/relative_lock_time_seconds_bincode
new file mode 100644
index 000000000..b6ed9a62a
Binary files /dev/null and b/dash/tests/data/serde/relative_lock_time_seconds_bincode differ
diff --git a/dash/tests/data/serde/script_bincode b/dash/tests/data/serde/script_bincode
new file mode 100644
index 000000000..5bf932f61
Binary files /dev/null and b/dash/tests/data/serde/script_bincode differ
diff --git a/dash/tests/data/serde/taproot_sig_bincode b/dash/tests/data/serde/taproot_sig_bincode
new file mode 100644
index 000000000..01f28cee7
Binary files /dev/null and b/dash/tests/data/serde/taproot_sig_bincode differ
diff --git a/dash/tests/data/serde/taproot_sig_hex b/dash/tests/data/serde/taproot_sig_hex
new file mode 100644
index 000000000..9ab24dd5b
--- /dev/null
+++ b/dash/tests/data/serde/taproot_sig_hex
@@ -0,0 +1 @@
+6470FD1303DDA4FDA717B9837153C24A6EAB377183FC438F939E0ED2B620E9EE5077C4A8B8DCA28963D772A94F5F0DDF598E1C47C137F91933274C7C3EDADCE8
diff --git a/dash/tests/data/serde/taptree_bincode b/dash/tests/data/serde/taptree_bincode
new file mode 100644
index 000000000..51979bfa8
Binary files /dev/null and b/dash/tests/data/serde/taptree_bincode differ
diff --git a/dash/tests/data/serde/transaction_bincode b/dash/tests/data/serde/transaction_bincode
new file mode 100644
index 000000000..82ffd66a7
Binary files /dev/null and b/dash/tests/data/serde/transaction_bincode differ
diff --git a/dash/tests/data/serde/transaction_ser b/dash/tests/data/serde/transaction_ser
new file mode 100644
index 000000000..b3112cd15
Binary files /dev/null and b/dash/tests/data/serde/transaction_ser differ
diff --git a/dash/tests/data/serde/txin_bincode b/dash/tests/data/serde/txin_bincode
new file mode 100644
index 000000000..92a61a1a2
Binary files /dev/null and b/dash/tests/data/serde/txin_bincode differ
diff --git a/dash/tests/data/serde/txin_ser b/dash/tests/data/serde/txin_ser
new file mode 100644
index 000000000..f2c5f3a6d
Binary files /dev/null and b/dash/tests/data/serde/txin_ser differ
diff --git a/dash/tests/data/serde/txout_bincode b/dash/tests/data/serde/txout_bincode
new file mode 100644
index 000000000..2c3d20777
Binary files /dev/null and b/dash/tests/data/serde/txout_bincode differ
diff --git a/dash/tests/data/serde/u256_bincode b/dash/tests/data/serde/u256_bincode
new file mode 100644
index 000000000..e91e8a928
Binary files /dev/null and b/dash/tests/data/serde/u256_bincode differ
diff --git a/dash/tests/data/serde/uint128_bincode b/dash/tests/data/serde/uint128_bincode
new file mode 100644
index 000000000..24087dd3c
Binary files /dev/null and b/dash/tests/data/serde/uint128_bincode differ
diff --git a/dash/tests/data/serde/uint256_bincode b/dash/tests/data/serde/uint256_bincode
new file mode 100644
index 000000000..6fe1e0320
Binary files /dev/null and b/dash/tests/data/serde/uint256_bincode differ
diff --git a/dash/tests/data/serde/witness_bincode b/dash/tests/data/serde/witness_bincode
new file mode 100644
index 000000000..e7d43be0f
Binary files /dev/null and b/dash/tests/data/serde/witness_bincode differ
diff --git a/dash/tests/data/sign_1_psbt_hex b/dash/tests/data/sign_1_psbt_hex
new file mode 100644
index 000000000..7f388dee1
--- /dev/null
+++ b/dash/tests/data/sign_1_psbt_hex
@@ -0,0 +1 @@
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
\ No newline at end of file
diff --git a/dash/tests/data/sign_2_psbt_hex b/dash/tests/data/sign_2_psbt_hex
new file mode 100644
index 000000000..537c3383b
--- /dev/null
+++ b/dash/tests/data/sign_2_psbt_hex
@@ -0,0 +1 @@
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
\ No newline at end of file
diff --git a/test_data/testnet_block_000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b.raw b/dash/tests/data/testnet_block_000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b.raw
similarity index 100%
rename from test_data/testnet_block_000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b.raw
rename to dash/tests/data/testnet_block_000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b.raw
diff --git a/dash/tests/data/update_1_psbt_hex b/dash/tests/data/update_1_psbt_hex
new file mode 100644
index 000000000..14d9c550c
--- /dev/null
+++ b/dash/tests/data/update_1_psbt_hex
@@ -0,0 +1 @@
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
\ No newline at end of file
diff --git a/dash/tests/data/update_2_psbt_hex b/dash/tests/data/update_2_psbt_hex
new file mode 100644
index 000000000..2003d3583
--- /dev/null
+++ b/dash/tests/data/update_2_psbt_hex
@@ -0,0 +1 @@
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
\ No newline at end of file
diff --git a/dash/tests/psbt.rs b/dash/tests/psbt.rs
new file mode 100644
index 000000000..849da6d83
--- /dev/null
+++ b/dash/tests/psbt.rs
@@ -0,0 +1,470 @@
+//! Tests PSBT integration vectors from BIP 174
+//! defined at <https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki#test-vectors>
+
+use core::convert::TryFrom;
+use std::collections::BTreeMap;
+use std::str::FromStr;
+
+use dashcore::bip32::{ExtendedPrivKey, ExtendedPubKey, Fingerprint, IntoDerivationPath, KeySource};
+use dashcore::blockdata::opcodes::OP_0;
+use dashcore::blockdata::script;
+use dashcore::consensus::encode::{deserialize, serialize_hex};
+use dashcore::hashes::hex::FromHex;
+use dashcore::psbt::{Psbt, PsbtSighashType};
+use dashcore::script::PushBytes;
+use dashcore::secp256k1::{self, Secp256k1};
+use dashcore::{Amount, Denomination, Network, OutPoint, PrivateKey, PublicKey, ScriptBuf, Transaction, TxIn, TxOut, Witness};
+
+const NETWORK: Network = Network::Testnet;
+
+macro_rules! hex_script {
+    ($s:expr) => {
+        <ScriptBuf>::from_hex($s).unwrap()
+    };
+}
+
+macro_rules! hex_psbt {
+    ($s:expr) => {
+        Psbt::deserialize(&<Vec<u8> as FromHex>::from_hex($s).unwrap())
+    };
+}
+
+#[test]
+fn bip174_psbt_workflow() {
+    let secp = Secp256k1::new();
+
+    //
+    // Step 0: Create the extended private key from the test vector data.
+    //
+
+    let ext_priv = build_extended_private_key();
+    let ext_pub = ExtendedPubKey::from_priv(&secp, &ext_priv);
+    let parent_fingerprint = ext_pub.fingerprint();
+
+    //
+    // Step 1: The creator.
+    //
+
+    let tx = create_transaction();
+    let psbt = create_psbt(tx);
+
+    //
+    // Step 2: The first updater.
+    //
+
+    let psbt = update_psbt(psbt, parent_fingerprint);
+
+    //
+    // Step 3: The second updater.
+    //
+
+    let psbt = update_psbt_with_sighash_all(psbt);
+
+    //
+    // Step 4: The first signer.
+    //
+
+    // Strings from BIP 174 test vector.
+    let test_vector = vec![
+        ("cQREycwKkUqJrgkYqcSLpv5Ab1ytgVkRk5e7dENJ5pQjUd83qwFd", "m/0h/0h/0h"), // from_priv, into_derivation_path?
+        ("cUQLHVPngMorTZfKhb74quVxtiUuHtt5CnbEgnZTUFk8Vhid9HCh", "m/0h/0h/2h"),
+    ];
+
+    // We pass the keys to the signer after doing verification to make explicit
+    // that signer is only using these two keys.
+    let keys = parse_and_verify_keys(&ext_priv, &test_vector);
+    let psbt_1 = signer_one_sign(psbt.clone(), keys);
+
+    //
+    // Step 5: The second signer.
+    //
+
+    // Strings from BIP 174 test vector.
+    let test_vector = vec![
+        ("cVKFqnCzcH5ZThgJ5YyfCYhh7Y8D6xkja7bdbwFT6FFAEtLTnqmy", "m/0h/0h/1h"),
+        ("cNUQGYrUibaUJ2eXuWohNiPJf4fuUHxnT4QYiMyT97QDhSuBZQBJ", "m/0h/0h/3h"),
+    ];
+
+    let keys = parse_and_verify_keys(&ext_priv, &test_vector);
+    let psbt_2 = signer_two_sign(psbt, keys);
+
+    //
+    // Step 6: Combiner the two signed PSBTs.
+    //
+
+    let combined = combine(psbt_1, psbt_2);
+
+    //
+    // Step 7: Finalize the PSBT.
+    //
+
+    let finalized = finalize(combined);
+
+    //
+    // Step 8: Extract the transaction.
+    //
+
+    let _tx = extract_transaction(finalized);
+
+    //
+    // Step 9: Test lexicographical PSBT combiner.
+    //
+    // Combine would be done earlier, at Step 6, in typical workflow.
+    // We define it here to reflect the order of test vectors in BIP 174.
+    //
+
+    combine_lexicographically();
+}
+
+/// Attempts to build an extended private key from seed and also directly from a string.
+fn build_extended_private_key() -> ExtendedPrivKey {
+    // Strings from BIP 174 test vector.
+    let extended_private_key = "tprv8ZgxMBicQKsPeo2FFervjry6YxkJ2JdXKbwP3SFnApxEMXDM9Kt22SzQfWbCCWXDAUHttNjcqvttEvVk7Tausd5TrL45aiTi7aug6f2c537";
+    let seed = "cUkG8i1RFfWGWy5ziR11zJ5V4U4W3viSFCfyJmZnvQaUsd1xuF3T";
+
+    let xpriv = ExtendedPrivKey::from_str(extended_private_key).unwrap();
+
+    let sk = PrivateKey::from_wif(seed).unwrap();
+    let seeded = ExtendedPrivKey::new_master(NETWORK, &sk.inner.secret_bytes()).unwrap();
+    assert_eq!(xpriv, seeded);
+
+    xpriv
+}
+
+/// Creates the initial transaction, called by the PSBT Creator.
+fn create_transaction() -> Transaction {
+    // Strings from BIP 174 test vector.
+    let output_0 = TvOutput {
+        amount: "1.49990000",
+        script_pubkey: "0014d85c2b71d0060b09c9886aeb815e50991dda124d",
+    };
+    let output_1 = TvOutput {
+        amount: "1.00000000",
+        script_pubkey: "001400aea9a2e5f0f876a588df5546e8742d1d87008f",
+    };
+    let input_0 = TvInput {
+        txid: "75ddabb27b8845f5247975c8a5ba7c6f336c4570708ebe230caf6db5217ae858",
+        index: 0,
+    };
+    let input_1 = TvInput {
+        txid: "1dea7cd05979072a3578cab271c02244ea8a090bbb46aa680a65ecd027048d83",
+        index: 1,
+    };
+    struct TvOutput {
+        amount: &'static str,
+        script_pubkey: &'static str,
+    }
+    struct TvInput {
+        txid: &'static str,
+        index: u32,
+    }
+
+    Transaction {
+        version: 2,
+        lock_time: 0,
+        input: vec![
+            TxIn {
+                previous_output: OutPoint {
+                    txid: input_0.txid.parse().expect("failed to parse txid"),
+                    vout: input_0.index,
+                },
+                script_sig: ScriptBuf::new(),
+                sequence: u32::MAX, // Disable nSequence.
+                witness: Witness::default(),
+            },
+            TxIn {
+                previous_output: OutPoint {
+                    txid: input_1.txid.parse().expect("failed to parse txid"),
+                    vout: input_1.index,
+                },
+                script_sig: ScriptBuf::new(),
+                sequence: u32::MAX,
+                witness: Witness::default(),
+            },
+        ],
+        output: vec![
+            TxOut {
+                value: Amount::from_str_in(output_0.amount, Denomination::Dash)
+                    .expect("failed to parse amount")
+                    .to_sat(),
+                script_pubkey: ScriptBuf::from_hex(output_0.script_pubkey)
+                    .expect("failed to parse script"),
+            },
+            TxOut {
+                value: Amount::from_str_in(output_1.amount, Denomination::Dash)
+                    .expect("failed to parse amount")
+                    .to_sat(),
+                script_pubkey: ScriptBuf::from_hex(output_1.script_pubkey)
+                    .expect("failed to parse script"),
+            },
+        ],
+        special_transaction_payload: None,
+    }
+}
+
+/// Creates the initial PSBT, called by the Creator. Verifies against BIP 174 test vector.
+fn create_psbt(tx: Transaction) -> Psbt {
+    // String from BIP 174 test vector.
+    let expected_psbt_hex = include_str!("data/create_psbt_hex");
+    let expected_psbt = hex_psbt!(expected_psbt_hex).unwrap();
+
+    let psbt = Psbt::from_unsigned_tx(tx).unwrap();
+
+    assert_eq!(psbt, expected_psbt);
+    psbt
+}
+
+/// Updates `psbt` according to the BIP, returns the newly updated PSBT. Verifies against BIP 174 test vector.
+fn update_psbt(mut psbt: Psbt, fingerprint: Fingerprint) -> Psbt {
+    // Strings from BIP 174 test vector.
+    let previous_tx_0 = include_str!("data/previous_tx_0_hex");
+    let previous_tx_1 = include_str!("data/previous_tx_1_hex");
+
+    let redeem_script_0 = "5221029583bf39ae0a609747ad199addd634fa6108559d6c5cd39b4c2183f1ab96e07f2102dab61ff49a14db6a7d02b0cd1fbb78fc4b18312b5b4e54dae4dba2fbfef536d752ae";
+    let redeem_script_1 = "00208c2353173743b595dfb4a07b72ba8e42e3797da74e87fe7d9d7497e3b2028903";
+    let witness_script = "522103089dc10c7ac6db54f91329af617333db388cead0c231f723379d1b99030b02dc21023add904f3d6dcf59ddb906b0dee23529b7ffb9ed50e5e86151926860221f0e7352ae";
+
+    // Public key and its derivation path (these are the child pubkeys for our `ExtendedPrivKey`,
+    // can be verified by deriving the key using this derivation path).
+    let pk_path = vec![
+        ("0353f34734bf126e6be1a52dce8a79a6530d5299e1cc4027f5bb96207da3085e94", "m/0h/0h/0h"),
+        ("0220bb0ddea616ff71ea6a85945b830cc4359d4178c90420dc4d6d80d25a4d9159", "m/0h/0h/1h"),
+        ("03a696181a5adfab2af3267ea0617493d0f677d75404e879360fd0246de3423df4", "m/0h/0h/2h"),
+        ("02e2cc9898cd2a31f923dae903b1da8df9ea468c75358188fa510b0e017ee41918", "m/0h/0h/3h"),
+        ("02a262d32e02856d69bb791042b3773b6fca08d62bcf87be9c5fa9e2b8d3adbb75", "m/0h/0h/4h"),
+        ("02c3c127892d7104e5f2f8c22612e0f81036ac64a7ac01d9ae0bc985337d4dd46e", "m/0h/0h/5h"),
+    ];
+
+    let expected_psbt_hex = include_str!("data/update_1_psbt_hex");
+    let expected_psbt = hex_psbt!(expected_psbt_hex).unwrap();
+
+    let mut input_0 = psbt.inputs[0].clone();
+
+    let v = Vec::from_hex(previous_tx_1).unwrap();
+    let tx: Transaction = deserialize(&v).unwrap();
+    input_0.non_witness_utxo = Some(tx);
+    input_0.redeem_script = Some(hex_script!(redeem_script_0));
+    input_0.bip32_derivation = bip32_derivation(fingerprint, &pk_path, vec![0, 1]);
+
+    let mut input_1 = psbt.inputs[1].clone();
+
+    let v = Vec::from_hex(previous_tx_0).unwrap();
+    let tx: Transaction = deserialize(&v).unwrap();
+    input_1.witness_utxo = Some(tx.output[1].clone());
+
+    input_1.redeem_script = Some(hex_script!(redeem_script_1));
+    input_1.witness_script = Some(hex_script!(witness_script));
+    input_1.bip32_derivation = bip32_derivation(fingerprint, &pk_path, vec![2, 3]);
+
+    psbt.inputs = vec![input_0, input_1];
+
+    let mut output_0 = psbt.outputs[0].clone();
+    output_0.bip32_derivation = bip32_derivation(fingerprint, &pk_path, vec![4]);
+
+    let mut output_1 = psbt.outputs[1].clone();
+    output_1.bip32_derivation = bip32_derivation(fingerprint, &pk_path, vec![5]);
+
+    psbt.outputs = vec![output_0, output_1];
+
+    assert_eq!(psbt, expected_psbt);
+    psbt
+}
+
+/// `pk_path` holds tuples of `(public_key, derivation_path)`. `indecies` is used to access the
+/// `pk_path` vector. `fingerprint` is from the parent extended public key.
+fn bip32_derivation(
+    fingerprint: Fingerprint,
+    pk_path: &[(&str, &str)],
+    indecies: Vec<usize>,
+) -> BTreeMap<secp256k1::PublicKey, KeySource> {
+    let mut tree = BTreeMap::new();
+    for i in indecies {
+        let pk = pk_path[i].0;
+        let path = pk_path[i].1;
+
+        let pk = PublicKey::from_str(pk).unwrap();
+        let path = path.into_derivation_path().unwrap();
+
+        tree.insert(pk.inner, (fingerprint, path));
+    }
+    tree
+}
+
+/// Does the second update according to the BIP, returns the newly updated PSBT. Verifies against BIP 174 test vector.
+fn update_psbt_with_sighash_all(mut psbt: Psbt) -> Psbt {
+    let expected_psbt_hex = include_str!("data/update_2_psbt_hex");
+    let expected_psbt = hex_psbt!(expected_psbt_hex).unwrap();
+    let ty = PsbtSighashType::from_str("SIGHASH_ALL").unwrap();
+
+    let mut input_0 = psbt.inputs[0].clone();
+    input_0.sighash_type = Some(ty);
+    let mut input_1 = psbt.inputs[1].clone();
+    input_1.sighash_type = Some(ty);
+
+    psbt.inputs = vec![input_0, input_1];
+
+    assert_eq!(psbt, expected_psbt);
+    psbt
+}
+
+/// Verifies the keys in the test vector are valid for the extended private key and derivation path.
+fn parse_and_verify_keys(
+    ext_priv: &ExtendedPrivKey,
+    sk_path: &[(&str, &str)],
+) -> BTreeMap<PublicKey, PrivateKey> {
+    let secp = &Secp256k1::new();
+
+    let mut key_map = BTreeMap::new();
+    for (secret_key, derivation_path) in sk_path.iter() {
+        let wif_priv = PrivateKey::from_wif(secret_key).expect("failed to parse key");
+
+        let path =
+            derivation_path.into_derivation_path().expect("failed to convert derivation path");
+        let derived_priv =
+            ext_priv.derive_priv(secp, &path).expect("failed to derive ext priv key").to_priv();
+        assert_eq!(wif_priv, derived_priv);
+        let derived_pub = derived_priv.public_key(secp);
+        key_map.insert(derived_pub, derived_priv);
+    }
+    key_map
+}
+
+/// Does the first signing according to the BIP, returns the signed PSBT. Verifies against BIP 174 test vector.
+fn signer_one_sign(psbt: Psbt, key_map: BTreeMap<PublicKey, PrivateKey>) -> Psbt {
+    let expected_psbt_hex = include_str!("data/sign_1_psbt_hex");
+    let expected_psbt = hex_psbt!(expected_psbt_hex).unwrap();
+
+    let psbt = sign(psbt, key_map);
+
+    assert_eq!(psbt, expected_psbt);
+    psbt
+}
+
+/// Does the second signing according to the BIP, returns the signed PSBT. Verifies against BIP 174 test vector.
+fn signer_two_sign(psbt: Psbt, key_map: BTreeMap<PublicKey, PrivateKey>) -> Psbt {
+    let expected_psbt_hex = include_str!("data/sign_2_psbt_hex");
+    let expected_psbt = hex_psbt!(expected_psbt_hex).unwrap();
+
+    let psbt = sign(psbt, key_map);
+
+    assert_eq!(psbt, expected_psbt);
+    psbt
+}
+
+/// Does the combine according to the BIP, returns the combined PSBT. Verifies against BIP 174 test vector.
+fn combine(mut this: Psbt, that: Psbt) -> Psbt {
+    let expected_psbt_hex = include_str!("data/combine_psbt_hex");
+    let expected_psbt = hex_psbt!(expected_psbt_hex).unwrap();
+
+    this.combine(that).expect("failed to combine PSBTs");
+
+    assert_eq!(this, expected_psbt);
+    this
+}
+
+/// Does the finalize step according to the BIP, returns the combined PSBT. Verifies against BIP 174
+/// test vector.
+fn finalize(psbt: Psbt) -> Psbt {
+    let expected_psbt_hex = include_str!("data/finalize_psbt_hex");
+    let expected_psbt = hex_psbt!(expected_psbt_hex).unwrap();
+
+    let psbt = finalize_psbt(psbt);
+
+    assert_eq!(psbt, expected_psbt);
+    psbt
+}
+
+/// Does the transaction extractor step according to the BIP, returns the combined PSBT. Verifies
+/// against BIP 174 test vector.
+fn extract_transaction(psbt: Psbt) -> Transaction {
+    let expected_tx_hex = include_str!("data/extract_tx_hex");
+
+    let tx = psbt.extract_tx();
+
+    let got = serialize_hex(&tx);
+    assert_eq!(got, expected_tx_hex);
+
+    tx
+}
+
+/// Combines two PSBTs lexicographically according to the BIP. Verifies against BIP 174 test vector.
+fn combine_lexicographically() {
+    let psbt_1_hex = include_str!("data/lex_psbt_1_hex");
+    let psbt_2_hex = include_str!("data/lex_psbt_2_hex");
+
+    let expected_psbt_hex = include_str!("data/lex_combine_psbt_hex");
+    let expected_psbt = hex_psbt!(expected_psbt_hex).unwrap();
+
+    let v = Vec::from_hex(psbt_1_hex).unwrap();
+    let mut psbt_1 = Psbt::deserialize(&v).expect("failed to deserialize psbt 1");
+
+    let v = Vec::from_hex(psbt_2_hex).unwrap();
+    let psbt_2 = Psbt::deserialize(&v).expect("failed to deserialize psbt 2");
+
+    psbt_1.combine(psbt_2).expect("failed to combine PSBTs");
+
+    assert_eq!(psbt_1, expected_psbt);
+}
+
+/// Signs `psbt` with `keys` if required.
+fn sign(mut psbt: Psbt, keys: BTreeMap<PublicKey, PrivateKey>) -> Psbt {
+    let secp = Secp256k1::new();
+    psbt.sign(&keys, &secp).unwrap();
+    psbt
+}
+
+/// Finalizes a PSBT accord to the Input Finalizer role described in BIP 174.
+/// This is just a test. For a production-ready PSBT Finalizer, use [rust-miniscript](https://docs.rs/miniscript/latest/miniscript/psbt/trait.PsbtExt.html#tymethod.finalize)
+fn finalize_psbt(mut psbt: Psbt) -> Psbt {
+    // Input 0: legacy UTXO
+
+    let sigs: Vec<_> = psbt.inputs[0].partial_sigs.values().collect();
+    let script_sig = script::Builder::new()
+        .push_opcode(OP_0) // OP_CHECKMULTISIG bug pops +1 value when evaluating so push OP_0.
+        .push_slice(sigs[0].serialize())
+        .push_slice(sigs[1].serialize())
+        .push_slice(
+            <&PushBytes>::try_from(psbt.inputs[0].redeem_script.as_ref().unwrap().as_bytes())
+                .unwrap(),
+        )
+        .into_script();
+
+    psbt.inputs[0].final_script_sig = Some(script_sig);
+
+    psbt.inputs[0].partial_sigs = BTreeMap::new();
+    psbt.inputs[0].sighash_type = None;
+    psbt.inputs[0].redeem_script = None;
+    psbt.inputs[0].bip32_derivation = BTreeMap::new();
+
+    // Input 1: SegWit UTXO
+
+    let script_sig = script::Builder::new()
+        .push_slice(
+            <&PushBytes>::try_from(psbt.inputs[1].redeem_script.as_ref().unwrap().as_bytes())
+                .unwrap(),
+        )
+        .into_script();
+
+    psbt.inputs[1].final_script_sig = Some(script_sig);
+
+    let script_witness = {
+        let sigs: Vec<_> = psbt.inputs[1].partial_sigs.values().collect();
+        let mut script_witness = Witness::new();
+        script_witness.push([]); // Push 0x00 to the stack.
+        script_witness.push(&sigs[1].to_vec());
+        script_witness.push(&sigs[0].to_vec());
+        script_witness.push(psbt.inputs[1].witness_script.clone().unwrap().as_bytes());
+
+        script_witness
+    };
+
+    psbt.inputs[1].final_script_witness = Some(script_witness);
+
+    psbt.inputs[1].partial_sigs = BTreeMap::new();
+    psbt.inputs[1].sighash_type = None;
+    psbt.inputs[1].redeem_script = None;
+    psbt.inputs[1].witness_script = None;
+    psbt.inputs[1].bip32_derivation = BTreeMap::new();
+
+    psbt
+}
diff --git a/dash/tests/serde.rs b/dash/tests/serde.rs
new file mode 100644
index 000000000..f4dead873
--- /dev/null
+++ b/dash/tests/serde.rs
@@ -0,0 +1,392 @@
+//! Regression tests for _most_ types that implement `serde::Serialize`.
+//!
+//! For remaining types see: ./serde_opcodes.rs
+//!
+//! If you find a type defined in `rust-dash` that implements `Serialize` and does _not_ have a
+//! regression test please add it.
+//!
+//! Types/tests were found using, and are ordered by, the output of: `git grep -l Serialize`.
+//!
+
+// In tests below `deserialize` is consensus deserialize while `serialize` is serde serialize, that
+// is why we have two different serialized data files for tests that use binary serialized input.
+//
+// To create a file with the expected serialized data do something like:
+//
+//  use std::fs::File;
+//  use std::io::Write;
+//  let script = ScriptBuf::from(vec![0u8, 1u8, 2u8]);
+//  let got = serialize(&script).unwrap();
+//  let mut file = File::create("/tmp/script_bincode").unwrap();
+//  file.write_all(&got).unwrap();
+
+#![cfg(feature = "serde")]
+
+use std::collections::BTreeMap;
+use std::convert::TryFrom;
+use std::str::FromStr;
+
+use bincode::serialize;
+use hex_lit::hex;
+use dashcore::{absolute, Address, Block, ecdsa, Network, OutPoint, PrivateKey, PublicKey, relative, ScriptBuf, taproot, Target, Transaction, Txid, TxIn, TxOut, Witness, Work};
+use dashcore::address::NetworkUnchecked;
+use dashcore::bip32::{ChildNumber, ExtendedPrivKey, ExtendedPubKey, KeySource};
+use dashcore::consensus::{deserialize};
+use dashcore::psbt::{Input, Output, Psbt, PsbtSighashType, raw};
+use dashcore::psbt::raw::{Key, Pair, ProprietaryKey};
+use dashcore::sighash::{EcdsaSighashType, TapSighashType};
+use dashcore::taproot::{ControlBlock, LeafVersion, TaprootBuilder, TapTree};
+use dashcore_hashes::{Hash, hash160, ripemd160, sha256, sha256d};
+
+/// Implicitly does regression test for `BlockHeader` also.
+#[ignore]
+#[test]
+fn serde_regression_block() {
+    let segwit = include_bytes!(
+        "data/testnet_block_000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b.raw"
+    );
+    let block: Block = deserialize(segwit).unwrap();
+    let got = serialize(&block).unwrap();
+    let want = include_bytes!("data/serde/block_bincode");
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_absolute_lock_time_height() {
+    let t = absolute::LockTime::from_height(741521).expect("valid height");
+    let got = serialize(&t).unwrap();
+    let want = include_bytes!("data/serde/absolute_lock_time_blocks_bincode") as &[_];
+    assert_eq!(got, want);
+}
+
+#[test]
+fn serde_regression_absolute_lock_time_time() {
+    let seconds: u32 = 1653195600; // May 22nd, 5am UTC.
+    let t = absolute::LockTime::from_time(seconds).expect("valid time");
+    let got = serialize(&t).unwrap();
+
+    let want = include_bytes!("data/serde/absolute_lock_time_seconds_bincode") as &[_];
+    assert_eq!(got, want);
+}
+
+#[test]
+fn serde_regression_relative_lock_time_height() {
+    let t = relative::LockTime::from(relative::Height::from(0xCAFE_u16));
+    let got = serialize(&t).unwrap();
+
+    let want = include_bytes!("data/serde/relative_lock_time_blocks_bincode") as &[_];
+    assert_eq!(got, want);
+}
+
+#[test]
+fn serde_regression_relative_lock_time_time() {
+    let t = relative::LockTime::from(relative::Time::from_512_second_intervals(0xFACE_u16));
+    let got = serialize(&t).unwrap();
+
+    let want = include_bytes!("data/serde/relative_lock_time_seconds_bincode") as &[_];
+    assert_eq!(got, want);
+}
+
+#[test]
+fn serde_regression_script() {
+    let script = ScriptBuf::from(vec![0u8, 1u8, 2u8]);
+    let got = serialize(&script).unwrap();
+    let want = include_bytes!("data/serde/script_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_txin() {
+    let ser = include_bytes!("data/serde/txin_ser");
+    let txin: TxIn = deserialize(ser).unwrap();
+
+    let got = serialize(&txin).unwrap();
+    let want = include_bytes!("data/serde/txin_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_txout() {
+    let txout =
+        TxOut { value: 0xDEADBEEFCAFEBABE, script_pubkey: ScriptBuf::from(vec![0u8, 1u8, 2u8]) };
+    let got = serialize(&txout).unwrap();
+    let want = include_bytes!("data/serde/txout_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[ignore]
+#[test]
+fn serde_regression_transaction() {
+    let ser = include_bytes!("data/serde/transaction_ser");
+    let tx: Transaction = deserialize(ser).unwrap();
+    let got = serialize(&tx).unwrap();
+    let want = include_bytes!("data/serde/transaction_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_witness() {
+    let w0 = hex!("03d2e15674941bad4a996372cb87e1856d3652606d98562fe39c5e9e7e413f2105");
+    let w1 = hex!("000000");
+    let vec:Vec<&[u8]> = vec![w0.as_slice(), w1.as_slice()];
+    let witness = Witness::from_slice(&vec);
+
+    let got = serialize(&witness).unwrap();
+    let want = include_bytes!("data/serde/witness_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_address() {
+    let s = include_str!("data/serde/public_key_hex");
+    let pk = PublicKey::from_str(s.trim()).unwrap();
+    let addr = Address::p2pkh(&pk, Network::Dash);
+
+    let got = serialize(&addr).unwrap();
+    let want = include_bytes!("data/serde/address_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_extended_priv_key() {
+    let s = include_str!("data/serde/extended_priv_key");
+    let key = ExtendedPrivKey::from_str(s.trim()).unwrap();
+    let got = serialize(&key).unwrap();
+    let want = include_bytes!("data/serde/extended_priv_key_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_extended_pub_key() {
+    let s = include_str!("data/serde/extended_pub_key");
+    let key = ExtendedPubKey::from_str(s.trim()).unwrap();
+    let got = serialize(&key).unwrap();
+    let want = include_bytes!("data/serde/extended_pub_key_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_ecdsa_sig() {
+    let s = include_str!("data/serde/ecdsa_sig_hex");
+    let sig = ecdsa::Signature {
+        sig: secp256k1::ecdsa::Signature::from_str(s.trim()).unwrap(),
+        hash_ty: EcdsaSighashType::All,
+    };
+
+    let got = serialize(&sig).unwrap();
+    let want = include_bytes!("data/serde/ecdsa_sig_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_control_block() {
+    let s = include_str!("data/serde/control_block_hex");
+        let block = ControlBlock::decode(&hex::decode(s.trim()).unwrap()).unwrap();
+    let got = serialize(&block).unwrap();
+
+    let want = include_bytes!("data/serde/control_block_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_child_number() {
+    let num = ChildNumber::Normal { index: 0xDEADBEEF };
+    let got = serialize(&num).unwrap();
+    let want = include_bytes!("data/serde/child_number_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_private_key() {
+    let sk = PrivateKey::from_wif("cVt4o7BGAig1UXywgGSmARhxMdzP5qvQsxKkSsc1XEkw3tDTQFpy").unwrap();
+    let got = serialize(&sk).unwrap();
+    let want = include_bytes!("data/serde/private_key_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_public_key() {
+    let s = include_str!("data/serde/public_key_hex");
+    let pk = PublicKey::from_str(s.trim()).unwrap();
+    let got = serialize(&pk).unwrap();
+    let want = include_bytes!("data/serde/public_key_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[ignore]
+#[test]
+fn serde_regression_psbt() {
+    let tx = Transaction {
+        version: 1,
+        lock_time: 0,
+        input: vec![TxIn {
+            previous_output: OutPoint {
+                txid: "e567952fb6cc33857f392efa3a46c995a28f69cca4bb1b37e0204dab1ec7a389"
+                    .parse::<Txid>()
+                    .unwrap(),
+                vout: 1,
+            },
+            script_sig: ScriptBuf::from_hex("160014be18d152a9b012039daf3da7de4f53349eecb985")
+                .unwrap(),
+            sequence: 4294967295,
+            witness: Witness::from_slice(&[hex!(
+                "03d2e15674941bad4a996372cb87e1856d3652606d98562fe39c5e9e7e413f2105"
+            )]),
+        }],
+        output: vec![TxOut {
+            value: 190303501938,
+            script_pubkey: ScriptBuf::from_hex("a914339725ba21efd62ac753a9bcd067d6c7a6a39d0587")
+                .unwrap(),
+        }],
+        special_transaction_payload: None,
+    };
+    let unknown: BTreeMap<raw::Key, Vec<u8>> =
+        vec![(raw::Key { type_value: 1, key: vec![0, 1] }, vec![3, 4, 5])].into_iter().collect();
+    let key_source = ("deadbeef".parse().unwrap(), "m/0'/1".parse().unwrap());
+    let keypaths: BTreeMap<secp256k1::PublicKey, KeySource> = vec![(
+        "0339880dc92394b7355e3d0439fa283c31de7590812ea011c4245c0674a685e883".parse().unwrap(),
+        key_source.clone(),
+    )]
+    .into_iter()
+    .collect();
+
+    let proprietary: BTreeMap<raw::ProprietaryKey, Vec<u8>> = vec![(
+        raw::ProprietaryKey {
+            prefix: "prefx".as_bytes().to_vec(),
+            subtype: 42,
+            key: "test_key".as_bytes().to_vec(),
+        },
+        vec![5, 6, 7],
+    )]
+    .into_iter()
+    .collect();
+
+    let psbt = Psbt {
+        version: 0,
+        xpub: {
+            let s = include_str!("data/serde/extended_pub_key");
+            let xpub = ExtendedPubKey::from_str(s.trim()).unwrap();
+            vec![(xpub, key_source)].into_iter().collect()
+        },
+        unsigned_tx: {
+            let mut unsigned = tx.clone();
+            unsigned.input[0].script_sig = ScriptBuf::new();
+            unsigned.input[0].witness = Witness::default();
+            unsigned
+        },
+        proprietary: proprietary.clone(),
+        unknown: unknown.clone(),
+
+        inputs: vec![Input {
+            non_witness_utxo: Some(tx),
+            witness_utxo: Some(TxOut {
+                value: 190303501938,
+                script_pubkey: ScriptBuf::from_hex("a914339725ba21efd62ac753a9bcd067d6c7a6a39d0587").unwrap(),
+            }),
+            sighash_type: Some(PsbtSighashType::from(EcdsaSighashType::from_str("SIGHASH_SINGLE|SIGHASH_ANYONECANPAY").unwrap())),
+            redeem_script: Some(vec![0x51].into()),
+            witness_script: None,
+            partial_sigs: vec![(
+                "0339880dc92394b7355e3d0439fa283c31de7590812ea011c4245c0674a685e883".parse().unwrap(),
+                "304402204f67e2afb76142d44fae58a2495d33a3419daa26cd0db8d04f3452b63289ac0f022010762a9fb67e94cc5cad9026f6dc99ff7f070f4278d30fbc7d0c869dd38c7fe701".parse().unwrap(),
+            )].into_iter().collect(),
+            bip32_derivation: keypaths.clone().into_iter().collect(),
+            final_script_witness: Some(Witness::from_slice(&[vec![1, 3], vec![5]])),
+            ripemd160_preimages: vec![(ripemd160::Hash::hash(&[]), vec![1, 2])].into_iter().collect(),
+            sha256_preimages: vec![(sha256::Hash::hash(&[]), vec![1, 2])].into_iter().collect(),
+            hash160_preimages: vec![(hash160::Hash::hash(&[]), vec![1, 2])].into_iter().collect(),
+            hash256_preimages: vec![(sha256d::Hash::hash(&[]), vec![1, 2])].into_iter().collect(),
+            proprietary: proprietary.clone(),
+            unknown: unknown.clone(),
+            ..Default::default()
+        }],
+        outputs: vec![Output {
+            bip32_derivation: keypaths.into_iter().collect(),
+            proprietary,
+            unknown,
+            ..Default::default()
+        }],
+    };
+
+    let got = serialize(&psbt).unwrap();
+    let want = include_bytes!("data/serde/psbt_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_raw_pair() {
+    let pair = Pair {
+        key: Key { type_value: 1u8, key: vec![0u8, 1u8, 2u8, 3u8] },
+        value: vec![0u8, 1u8, 2u8, 3u8],
+    };
+    let got = serialize(&pair).unwrap();
+    let want = include_bytes!("data/serde/raw_pair_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_proprietary_key() {
+    let key = ProprietaryKey {
+        prefix: vec![0u8, 1u8, 2u8, 3u8],
+        subtype: 1u8,
+        key: vec![0u8, 1u8, 2u8, 3u8],
+    };
+    let got = serialize(&key).unwrap();
+    let want = include_bytes!("data/serde/proprietary_key_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_taproot_sig() {
+    let s = include_str!("data/serde/taproot_sig_hex");
+    let sig = taproot::Signature {
+        sig: secp256k1::schnorr::Signature::from_str(s.trim()).unwrap(),
+        hash_ty: TapSighashType::All,
+    };
+
+    let got = serialize(&sig).unwrap();
+    let want = include_bytes!("data/serde/taproot_sig_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_taptree() {
+    let ver = LeafVersion::from_consensus(0).unwrap();
+    let script = ScriptBuf::from(vec![0u8, 1u8, 2u8]);
+    let mut builder = TaprootBuilder::new().add_leaf_with_ver(1, script.clone(), ver).unwrap();
+    builder = builder.add_leaf(1, script).unwrap();
+    let tree = TapTree::try_from(builder).unwrap();
+
+    let got = serialize(&tree).unwrap();
+    let want = include_bytes!("data/serde/taptree_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+// Used to get a 256 bit integer as a byte array.
+fn le_bytes() -> [u8; 32] {
+    let x: u128 = 0xDEAD_BEEF_CAFE_BABE_DEAD_BEEF_CAFE_BABE;
+    let y: u128 = 0xCAFE_DEAD_BABE_BEEF_CAFE_DEAD_BABE_BEEF;
+
+    let mut bytes = [0_u8; 32];
+
+    bytes[..16].copy_from_slice(&x.to_le_bytes());
+    bytes[16..].copy_from_slice(&y.to_le_bytes());
+
+    bytes
+}
+
+#[test]
+fn serde_regression_work() {
+    let work = Work::from_le_bytes(le_bytes());
+    let got = serialize(&work).unwrap();
+    let want = include_bytes!("data/serde/u256_bincode") as &[_];
+    assert_eq!(got, want)
+}
+
+#[test]
+fn serde_regression_target() {
+    let target = Target::from_le_bytes(le_bytes());
+    let got = serialize(&target).unwrap();
+    let want = include_bytes!("data/serde/u256_bincode") as &[_];
+    assert_eq!(got, want)
+}
diff --git a/dash/tests/serde_opcodes.rs b/dash/tests/serde_opcodes.rs
new file mode 100644
index 000000000..b14bd7a13
--- /dev/null
+++ b/dash/tests/serde_opcodes.rs
@@ -0,0 +1,280 @@
+//! serde regression tests for blockdata::opcodes module.
+//!
+
+#![cfg(feature = "serde")]
+
+extern crate dashcore;
+extern crate serde_json;
+
+macro_rules! test_opcodes {
+    ($($op:ident),* $(,)+) => {
+        $(
+            let op = dashcore::blockdata::opcodes::all::$op;
+            let want = concat!("\"", stringify!($op), "\"");
+            let got = ::serde_json::to_string(&op).unwrap();
+            assert_eq!(got, want);
+        )*
+    }
+}
+
+#[test]
+fn serde_regression_opcodes() {
+    test_opcodes! {
+        OP_PUSHBYTES_0,
+        OP_PUSHBYTES_1,
+        OP_PUSHBYTES_2,
+        OP_PUSHBYTES_3,
+        OP_PUSHBYTES_4,
+        OP_PUSHBYTES_5,
+        OP_PUSHBYTES_6,
+        OP_PUSHBYTES_7,
+        OP_PUSHBYTES_8,
+        OP_PUSHBYTES_9,
+        OP_PUSHBYTES_10,
+        OP_PUSHBYTES_11,
+        OP_PUSHBYTES_12,
+        OP_PUSHBYTES_13,
+        OP_PUSHBYTES_14,
+        OP_PUSHBYTES_15,
+        OP_PUSHBYTES_16,
+        OP_PUSHBYTES_17,
+        OP_PUSHBYTES_18,
+        OP_PUSHBYTES_19,
+        OP_PUSHBYTES_20,
+        OP_PUSHBYTES_21,
+        OP_PUSHBYTES_22,
+        OP_PUSHBYTES_23,
+        OP_PUSHBYTES_24,
+        OP_PUSHBYTES_25,
+        OP_PUSHBYTES_26,
+        OP_PUSHBYTES_27,
+        OP_PUSHBYTES_28,
+        OP_PUSHBYTES_29,
+        OP_PUSHBYTES_30,
+        OP_PUSHBYTES_31,
+        OP_PUSHBYTES_32,
+        OP_PUSHBYTES_33,
+        OP_PUSHBYTES_34,
+        OP_PUSHBYTES_35,
+        OP_PUSHBYTES_36,
+        OP_PUSHBYTES_37,
+        OP_PUSHBYTES_38,
+        OP_PUSHBYTES_39,
+        OP_PUSHBYTES_40,
+        OP_PUSHBYTES_41,
+        OP_PUSHBYTES_42,
+        OP_PUSHBYTES_43,
+        OP_PUSHBYTES_44,
+        OP_PUSHBYTES_45,
+        OP_PUSHBYTES_46,
+        OP_PUSHBYTES_47,
+        OP_PUSHBYTES_48,
+        OP_PUSHBYTES_49,
+        OP_PUSHBYTES_50,
+        OP_PUSHBYTES_51,
+        OP_PUSHBYTES_52,
+        OP_PUSHBYTES_53,
+        OP_PUSHBYTES_54,
+        OP_PUSHBYTES_55,
+        OP_PUSHBYTES_56,
+        OP_PUSHBYTES_57,
+        OP_PUSHBYTES_58,
+        OP_PUSHBYTES_59,
+        OP_PUSHBYTES_60,
+        OP_PUSHBYTES_61,
+        OP_PUSHBYTES_62,
+        OP_PUSHBYTES_63,
+        OP_PUSHBYTES_64,
+        OP_PUSHBYTES_65,
+        OP_PUSHBYTES_66,
+        OP_PUSHBYTES_67,
+        OP_PUSHBYTES_68,
+        OP_PUSHBYTES_69,
+        OP_PUSHBYTES_70,
+        OP_PUSHBYTES_71,
+        OP_PUSHBYTES_72,
+        OP_PUSHBYTES_73,
+        OP_PUSHBYTES_74,
+        OP_PUSHBYTES_75,
+        OP_PUSHDATA1,
+        OP_PUSHDATA2,
+        OP_PUSHDATA4,
+        OP_PUSHNUM_NEG1,
+        OP_RESERVED,
+        OP_PUSHNUM_1,
+        OP_PUSHNUM_2,
+        OP_PUSHNUM_3,
+        OP_PUSHNUM_4,
+        OP_PUSHNUM_5,
+        OP_PUSHNUM_6,
+        OP_PUSHNUM_7,
+        OP_PUSHNUM_8,
+        OP_PUSHNUM_9,
+        OP_PUSHNUM_10,
+        OP_PUSHNUM_11,
+        OP_PUSHNUM_12,
+        OP_PUSHNUM_13,
+        OP_PUSHNUM_14,
+        OP_PUSHNUM_15,
+        OP_PUSHNUM_16,
+        OP_NOP,
+        OP_VER,
+        OP_IF,
+        OP_NOTIF,
+        OP_VERIF,
+        OP_VERNOTIF,
+        OP_ELSE,
+        OP_ENDIF,
+        OP_VERIFY,
+        OP_RETURN,
+        OP_TOALTSTACK,
+        OP_FROMALTSTACK,
+        OP_2DROP,
+        OP_2DUP,
+        OP_3DUP,
+        OP_2OVER,
+        OP_2ROT,
+        OP_2SWAP,
+        OP_IFDUP,
+        OP_DEPTH,
+        OP_DROP,
+        OP_DUP,
+        OP_NIP,
+        OP_OVER,
+        OP_PICK,
+        OP_ROLL,
+        OP_ROT,
+        OP_SWAP,
+        OP_TUCK,
+        OP_CAT,
+        OP_SUBSTR,
+        OP_LEFT,
+        OP_RIGHT,
+        OP_SIZE,
+        OP_INVERT,
+        OP_AND,
+        OP_OR,
+        OP_XOR,
+        OP_EQUAL,
+        OP_EQUALVERIFY,
+        OP_RESERVED1,
+        OP_RESERVED2,
+        OP_1ADD,
+        OP_1SUB,
+        OP_2MUL,
+        OP_2DIV,
+        OP_NEGATE,
+        OP_ABS,
+        OP_NOT,
+        OP_0NOTEQUAL,
+        OP_ADD,
+        OP_SUB,
+        OP_MUL,
+        OP_DIV,
+        OP_MOD,
+        OP_LSHIFT,
+        OP_RSHIFT,
+        OP_BOOLAND,
+        OP_BOOLOR,
+        OP_NUMEQUAL,
+        OP_NUMEQUALVERIFY,
+        OP_NUMNOTEQUAL,
+        OP_LESSTHAN ,
+        OP_GREATERTHAN ,
+        OP_LESSTHANOREQUAL ,
+        OP_GREATERTHANOREQUAL ,
+        OP_MIN,
+        OP_MAX,
+        OP_WITHIN,
+        OP_RIPEMD160,
+        OP_SHA1,
+        OP_SHA256,
+        OP_HASH160,
+        OP_HASH256,
+        OP_CODESEPARATOR,
+        OP_CHECKSIG,
+        OP_CHECKSIGVERIFY,
+        OP_CHECKMULTISIG,
+        OP_CHECKMULTISIGVERIFY,
+        OP_NOP1,
+        OP_CLTV,
+        OP_CSV,
+        OP_NOP4,
+        OP_NOP5,
+        OP_NOP6,
+        OP_NOP7,
+        OP_NOP8,
+        OP_NOP9,
+        OP_NOP10,
+        OP_CHECKSIGADD,
+        OP_RETURN_187,
+        OP_RETURN_188,
+        OP_RETURN_189,
+        OP_RETURN_190,
+        OP_RETURN_191,
+        OP_RETURN_192,
+        OP_RETURN_193,
+        OP_RETURN_194,
+        OP_RETURN_195,
+        OP_RETURN_196,
+        OP_RETURN_197,
+        OP_RETURN_198,
+        OP_RETURN_199,
+        OP_RETURN_200,
+        OP_RETURN_201,
+        OP_RETURN_202,
+        OP_RETURN_203,
+        OP_RETURN_204,
+        OP_RETURN_205,
+        OP_RETURN_206,
+        OP_RETURN_207,
+        OP_RETURN_208,
+        OP_RETURN_209,
+        OP_RETURN_210,
+        OP_RETURN_211,
+        OP_RETURN_212,
+        OP_RETURN_213,
+        OP_RETURN_214,
+        OP_RETURN_215,
+        OP_RETURN_216,
+        OP_RETURN_217,
+        OP_RETURN_218,
+        OP_RETURN_219,
+        OP_RETURN_220,
+        OP_RETURN_221,
+        OP_RETURN_222,
+        OP_RETURN_223,
+        OP_RETURN_224,
+        OP_RETURN_225,
+        OP_RETURN_226,
+        OP_RETURN_227,
+        OP_RETURN_228,
+        OP_RETURN_229,
+        OP_RETURN_230,
+        OP_RETURN_231,
+        OP_RETURN_232,
+        OP_RETURN_233,
+        OP_RETURN_234,
+        OP_RETURN_235,
+        OP_RETURN_236,
+        OP_RETURN_237,
+        OP_RETURN_238,
+        OP_RETURN_239,
+        OP_RETURN_240,
+        OP_RETURN_241,
+        OP_RETURN_242,
+        OP_RETURN_243,
+        OP_RETURN_244,
+        OP_RETURN_245,
+        OP_RETURN_246,
+        OP_RETURN_247,
+        OP_RETURN_248,
+        OP_RETURN_249,
+        OP_RETURN_250,
+        OP_RETURN_251,
+        OP_RETURN_252,
+        OP_RETURN_253,
+        OP_RETURN_254,
+        OP_INVALIDOPCODE,
+    }
+}
diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock
new file mode 100644
index 000000000..85292d503
--- /dev/null
+++ b/fuzz/Cargo.lock
@@ -0,0 +1,409 @@
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+# It is not intended for manual editing.
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+
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+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+dependencies = [
+ "semver",
+]
+
+[[package]]
+name = "rustversion"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f3208ce4d8448b3f3e7d168a73f5e0c43a61e32930de3bceeccedb388b6bf06"
+
+[[package]]
+name = "secp256k1"
+version = "0.27.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25996b82292a7a57ed3508f052cfff8640d38d32018784acd714758b43da9c8f"
+dependencies = [
+ "bitcoin_hashes",
+ "secp256k1-sys",
+]
+
+[[package]]
+name = "secp256k1-sys"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70a129b9e9efbfb223753b9163c4ab3b13cff7fd9c7f010fbac25ab4099fa07e"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "semver"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
+dependencies = [
+ "semver-parser",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
+
+[[package]]
+name = "strsim"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
+
+[[package]]
+name = "syn"
+version = "1.0.99"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "textwrap"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+dependencies = [
+ "unicode-width",
+]
+
+[[package]]
+name = "thiserror"
+version = "1.0.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f5f6586b7f764adc0231f4c79be7b920e766bb2f3e51b3661cdb263828f19994"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12bafc5b54507e0149cdf1b145a5d80ab80a90bcd9275df43d4fff68460f6c21"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4f5b37a154999a8f3f98cc23a628d850e154479cd94decf3414696e12e31aaf"
+
+[[package]]
+name = "unicode-width"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
+
+[[package]]
+name = "vec_map"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "xdg"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c4583db5cbd4c4c0303df2d15af80f0539db703fa1c68802d4cbbd2dd0f88f6"
+dependencies = [
+ "dirs",
+]
diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index 82bb863ba..385e52254 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -1,65 +1,89 @@
 [package]
-name = "bitcoin-fuzz"
+name = "dash-fuzz"
+edition = "2018"
 version = "0.0.1"
-authors = ["Automatically generated"]
+authors = ["Generated by fuzz/generate-files.sh"]
 publish = false
 
 [package.metadata]
 cargo-fuzz = true
 
-[features]
-afl_fuzz = ["afl"]
-honggfuzz_fuzz = ["honggfuzz"]
-
 [dependencies]
-honggfuzz = { version = "0.5", optional = true, default-features = false }
-afl = { version = "0.4", optional = true }
-dashcore = { path = ".." }
+honggfuzz = { version = "0.5", default-features = false }
+dashcore = { path = "../dash", features = [ "serde" ] }
+
+serde = { version = "1.0.103", features = [ "derive" ] }
+serde_json = "1.0"
+serde_cbor = "0.9"
+
+[[bin]]
+name = "dash_outpoint_string"
+path = "fuzz_targets/dash/outpoint_string.rs"
+
+[[bin]]
+name = "dash_deserialize_amount"
+path = "fuzz_targets/dash/deserialize_amount.rs"
+
+[[bin]]
+name = "dash_deserialize_transaction"
+path = "fuzz_targets/dash/deserialize_transaction.rs"
 
-# Prevent this from interfering with workspaces
-[workspace]
-members = ["."]
+[[bin]]
+name = "dash_deser_net_msg"
+path = "fuzz_targets/dash/deser_net_msg.rs"
+
+[[bin]]
+name = "dash_deserialize_address"
+path = "fuzz_targets/dash/deserialize_address.rs"
+
+[[bin]]
+name = "dash_script_bytes_to_asm_fmt"
+path = "fuzz_targets/dash/script_bytes_to_asm_fmt.rs"
+
+[[bin]]
+name = "dash_deserialize_prefilled_transaction"
+path = "fuzz_targets/dash/deserialize_prefilled_transaction.rs"
 
 [[bin]]
-name = "deserialize_block"
-path = "fuzz_targets/deserialize_block.rs"
+name = "dash_deserialize_witness"
+path = "fuzz_targets/dash/deserialize_witness.rs"
 
 [[bin]]
-name = "deserialize_script"
-path = "fuzz_targets/deserialize_script.rs"
+name = "dash_deserialize_psbt"
+path = "fuzz_targets/dash/deserialize_psbt.rs"
 
 [[bin]]
-name = "deserialize_transaction"
-path = "fuzz_targets/deserialize_transaction.rs"
+name = "dash_deserialize_block"
+path = "fuzz_targets/dash/deserialize_block.rs"
 
 [[bin]]
-name = "deserialize_address"
-path = "fuzz_targets/deserialize_address.rs"
+name = "dash_deserialize_script"
+path = "fuzz_targets/dash/deserialize_script.rs"
 
 [[bin]]
-name = "deserialize_amount"
-path = "fuzz_targets/deserialize_amount.rs"
+name = "hashes_json"
+path = "fuzz_targets/hashes/json.rs"
 
 [[bin]]
-name = "outpoint_string"
-path = "fuzz_targets/outpoint_string.rs"
+name = "hashes_cbor"
+path = "fuzz_targets/hashes/cbor.rs"
 
 [[bin]]
-name = "deserialize_psbt"
-path = "fuzz_targets/deserialize_psbt.rs"
+name = "hashes_sha256"
+path = "fuzz_targets/hashes/sha256.rs"
 
 [[bin]]
-name = "deser_net_msg"
-path = "fuzz_targets/deser_net_msg.rs"
+name = "hashes_ripemd160"
+path = "fuzz_targets/hashes/ripemd160.rs"
 
 [[bin]]
-name = "uint128_fuzz"
-path = "fuzz_targets/uint128_fuzz.rs"
+name = "hashes_sha512_256"
+path = "fuzz_targets/hashes/sha512_256.rs"
 
 [[bin]]
-name = "script_bytes_to_asm_fmt"
-path = "fuzz_targets/script_bytes_to_asm_fmt.rs"
+name = "hashes_sha512"
+path = "fuzz_targets/hashes/sha512.rs"
 
 [[bin]]
-name = "deserialize_witness"
-path = "fuzz_targets/deserialize_witness.rs"
+name = "hashes_sha1"
+path = "fuzz_targets/hashes/sha1.rs"
diff --git a/fuzz/README.md b/fuzz/README.md
new file mode 100644
index 000000000..0da44365d
--- /dev/null
+++ b/fuzz/README.md
@@ -0,0 +1,93 @@
+# Fuzzing
+
+`dash` and `dash_hashes` have fuzzing harnesses setup for use with
+honggfuzz.
+
+To run the fuzz-tests as in CI -- briefly fuzzing every target -- simply
+run
+
+    ./fuzz.sh
+
+in this directory.
+
+To build honggfuzz, you must have libunwind on your system, as well as
+libopcodes and libbfd from binutils **2.38** on your system. The most
+recently-released binutils 2.39 has changed their API in a breaking way.
+
+On Nix, you can obtain these libraries by running
+
+    nix-shell -p libopcodes_2_38 -p libunwind
+
+and then run fuzz.sh as above.
+
+# Long-term fuzzing
+
+To see the full list of targets, the most straightforward way is to run
+
+    source ./fuzz-util.sh
+    listTargetNames
+
+To run each of them for an hour, run
+
+    ./cycle.sh
+
+To run a single fuzztest indefinitely, run
+
+    HFUZZ_BUILD_ARGS='--features honggfuzz_fuzz' cargo hfuzz run <target>
+
+This script uses the `chrt` utility to try to reduce the priority of the
+jobs. If you would like to run for longer, the most straightforward way
+is to edit `cycle.sh` before starting. To run the fuzz-tests in parallel,
+you will need to implement a custom harness.
+
+# Adding fuzz tests
+
+All fuzz tests can be found in the `fuzz_target/` directory. Adding a new
+one is as simple as copying an existing one and editing the `do_test`
+function to do what you want.
+
+If your test clearly belongs to a specific crate, please put it in that
+crate's directory. Otherwise you can put it directly in `fuzz_target/`.
+
+If you need to add dependencies, edit the file `generate-files.sh` to add
+it to the generated `Cargo.toml`.
+
+Once you've added a fuzztest, regenerate the `Cargo.toml` and CI job by
+running
+
+    ./generate-files.sh
+
+Then to test your fuzztest, run
+
+    ./fuzz.sh <target>
+
+If it is working, you will see a rapid stream of data for many seconds
+(you can hit Ctrl+C to stop it early). If not, you should quickly see
+an error.
+
+# Reproducing Failures
+
+If a fuzztest fails, it will exit with a summary which looks something like
+
+```
+...
+ fuzzTarget      : hfuzz_target/x86_64-unknown-linux-gnu/release/hashes_sha256 
+CRASH:
+DESCRIPTION: 
+ORIG_FNAME: 00000000000000000000000000000000.00000000.honggfuzz.cov
+FUZZ_FNAME: hfuzz_workspace/hashes_sha256/SIGABRT.PC.7ffff7c8abc7.STACK.18826d9b64.CODE.-6.ADDR.0.INSTR.mov____%eax,%ebp.fuzz
+...
+=====================================================================
+fff400610004
+```
+
+The final line is a hex-encoded version of the input that caused the crash. You
+can test this directly by editing the `duplicate_crash` test to copy/paste the
+hex output into the call to `extend_vec_from_hex`. Then run the test with
+
+    RUSTFLAGS=--cfg=fuzzing cargo test
+
+It is important to add the `cfg=fuzzing` flag, which tells rustc to compile the
+library as though it were running a fuzztest. In particular, this will disable
+or weaken all the cryptography.
+
diff --git a/fuzz/contrib/test.sh b/fuzz/contrib/test.sh
new file mode 100755
index 000000000..fd34b23cb
--- /dev/null
+++ b/fuzz/contrib/test.sh
@@ -0,0 +1,44 @@
+#!/bin/sh
+
+set -ex
+
+FEATURES=""
+
+cargo --version
+rustc --version
+
+# Make all cargo invocations verbose
+export CARGO_TERM_VERBOSE=true
+
+# Pin dependencies as required if we are using MSRV toolchain.
+if cargo --version | grep "1\.41"; then
+    # 1.0.157 uses syn 2.0 which requires edition 2021
+    cargo update -p serde --precise 1.0.156
+    # 1.0.108 uses `matches!` macro so does not work with Rust 1.41.1, bad `syn` no biscuit.
+    cargo update -p syn --precise 1.0.107
+    # Half 1.8 uses edition 2021 features
+    cargo update -p half --precise 1.7.1
+fi
+
+if [ "$DO_LINT" = true ]
+then
+    cargo clippy --all-features --all-targets -- -D warnings
+fi
+
+# Defaults / sanity checks
+cargo build
+cargo test
+
+# Address Sanitizer
+if [ "$DO_ASAN" = true ]; then
+    cargo clean
+    CC='clang -fsanitize=address -fno-omit-frame-pointer'                                        \
+    RUSTFLAGS='-Zsanitizer=address -Clinker=clang -Cforce-frame-pointers=yes'                    \
+    ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' \
+    cargo test --lib --no-default-features --features="$FEATURES" -Zbuild-std --target x86_64-unknown-linux-gnu
+    cargo clean
+    CC='clang -fsanitize=memory -fno-omit-frame-pointer'                                         \
+    RUSTFLAGS='-Zsanitizer=memory -Zsanitizer-memory-track-origins -Cforce-frame-pointers=yes'   \
+    cargo test --lib --no-default-features --features="$FEATURES" -Zbuild-std --target x86_64-unknown-linux-gnu
+fi
+
diff --git a/fuzz/cycle.sh b/fuzz/cycle.sh
new file mode 100755
index 000000000..0b59827a1
--- /dev/null
+++ b/fuzz/cycle.sh
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+# Continuosly cycle over fuzz targets running each for 1 hour.
+# It uses chrt SCHED_IDLE so that other process takes priority.
+#
+# For hfuzz options see https://github.com/google/honggfuzz/blob/master/docs/USAGE.md
+
+set -e
+REPO_DIR=$(git rev-parse --show-toplevel)
+# shellcheck source=./fuzz-util.sh
+source "$REPO_DIR/fuzz/fuzz-util.sh"
+
+while :
+do
+  for targetFile in $(listTargetFiles); do
+    targetName=$(targetFileToName "$targetFile")
+    echo "Fuzzing target $targetName ($targetFile)"
+
+    # fuzz for one hour
+    HFUZZ_RUN_ARGS='--run_time 3600' chrt -i 0 cargo hfuzz run "$targetName"
+    # minimize the corpus
+    HFUZZ_RUN_ARGS="-i hfuzz_workspace/$targetName/input/ -P -M" chrt -i 0 cargo hfuzz run "$targetName"
+  done
+done
+
diff --git a/fuzz/fuzz-util.sh b/fuzz/fuzz-util.sh
new file mode 100755
index 000000000..20289b677
--- /dev/null
+++ b/fuzz/fuzz-util.sh
@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+
+REPO_DIR=$(git rev-parse --show-toplevel)
+
+listTargetFiles() {
+  pushd "$REPO_DIR/fuzz" > /dev/null || exit 1
+  find fuzz_targets -type f -name "*.rs" \
+    | grep -v 'deserialize_transaction\|deserialize_prefilled_transaction\|deserialize_psbt'
+  popd > /dev/null || exit 1
+}
+
+targetFileToName() {
+  echo "$1" \
+    | sed 's/^fuzz_targets\///' \
+    | sed 's/\.rs$//' \
+    | sed 's/\//_/g'
+}
+
+targetFileToHFuzzInputArg() {
+  baseName=$(basename "$1")
+  dirName="${baseName%.*}"
+  if [ -d "hfuzz_input/$dirName" ]; then
+    echo "HFUZZ_INPUT_ARGS=\"-f hfuzz_input/$FILE/input\""
+  fi
+}
+
+listTargetNames() {
+  for target in $(listTargetFiles); do
+    targetFileToName "$target"
+  done
+}
+
+# Utility function to avoid CI failures on Windows
+checkWindowsFiles() {
+  incorrectFilenames=$(find . -type f -name "*,*" -o -name "*:*" -o -name "*<*" -o -name "*>*" -o -name "*|*" -o -name "*\?*" -o -name "*\**" -o -name "*\"*" | wc -l)
+  if [ "$incorrectFilenames" -gt 0 ]; then
+    echo "Bailing early because there is a Windows-incompatible filename in the tree."
+    exit 2
+  fi
+}
+
+# Checks whether a fuzz case output some report, and dumps it in hex
+checkReport() {
+  reportFile="hfuzz_workspace/$1/HONGGFUZZ.REPORT.TXT"
+  if [ -f "$reportFile" ]; then
+    cat "$reportFile"
+    for CASE in "hfuzz_workspace/$1/SIG"*; do
+      xxd -p -c10000 < "$CASE"
+    done
+    exit 1
+  fi
+}
diff --git a/fuzz/fuzz.sh b/fuzz/fuzz.sh
new file mode 100755
index 000000000..5fc65ae63
--- /dev/null
+++ b/fuzz/fuzz.sh
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+set -ex
+
+REPO_DIR=$(git rev-parse --show-toplevel)
+
+# shellcheck source=./fuzz-util.sh
+source "$REPO_DIR/fuzz/fuzz-util.sh"
+
+# Check that input files are correct Windows file names
+checkWindowsFiles
+
+if [ "$1" == "" ]; then
+  targetFiles="$(listTargetFiles)"
+else
+  targetFiles=fuzz_targets/"$1".rs
+fi
+
+cargo --version
+rustc --version
+
+# Testing
+cargo install --force honggfuzz --no-default-features
+for targetFile in $targetFiles; do
+  targetName=$(targetFileToName "$targetFile")
+  echo "Fuzzing target $targetName ($targetFile)"
+  if [ -d "hfuzz_input/$targetName" ]; then
+    HFUZZ_INPUT_ARGS="-f hfuzz_input/$targetName/input\""
+  else
+    HFUZZ_INPUT_ARGS=""
+  fi
+  HFUZZ_RUN_ARGS="--run_time 30 --exit_upon_crash -v $HFUZZ_INPUT_ARGS" cargo hfuzz run "$targetName"
+
+  checkReport "$targetName"
+done
diff --git a/fuzz/fuzz_targets/deser_net_msg.rs b/fuzz/fuzz_targets/dash/deser_net_msg.rs
similarity index 71%
rename from fuzz/fuzz_targets/deser_net_msg.rs
rename to fuzz/fuzz_targets/dash/deser_net_msg.rs
index 2146518b4..16fe4b6e6 100644
--- a/fuzz/fuzz_targets/deser_net_msg.rs
+++ b/fuzz/fuzz_targets/dash/deser_net_msg.rs
@@ -1,21 +1,10 @@
-extern crate dashcore;
+use honggfuzz::fuzz;
 
 fn do_test(data: &[u8]) {
-    let _: Result<dashcore::network::message::RawNetworkMessage, _> = dashcore::consensus::encode::deserialize(data);
+    let _: Result<dashcore::network::message::RawNetworkMessage, _> =
+        dashcore::consensus::encode::deserialize(data);
 }
 
-#[cfg(feature = "afl")]
-#[macro_use] extern crate afl;
-#[cfg(feature = "afl")]
-fn main() {
-    fuzz!(|data| {
-        do_test(&data);
-    });
-}
-
-#[cfg(feature = "honggfuzz")]
-#[macro_use] extern crate honggfuzz;
-#[cfg(feature = "honggfuzz")]
 fn main() {
     loop {
         fuzz!(|data| {
@@ -24,7 +13,7 @@ fn main() {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, fuzzing))]
 mod tests {
     fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
         let mut b = 0;
diff --git a/fuzz/fuzz_targets/deserialize_address.rs b/fuzz/fuzz_targets/dash/deserialize_address.rs
similarity index 71%
rename from fuzz/fuzz_targets/deserialize_address.rs
rename to fuzz/fuzz_targets/dash/deserialize_address.rs
index e7a1ebc20..949a9b5c1 100644
--- a/fuzz/fuzz_targets/deserialize_address.rs
+++ b/fuzz/fuzz_targets/dash/deserialize_address.rs
@@ -1,26 +1,16 @@
-extern crate dashcore;
 use std::str::FromStr;
+
+use honggfuzz::fuzz;
+
 fn do_test(data: &[u8]) {
     let data_str = String::from_utf8_lossy(data);
-    let addr = match dashcore::util::address::Address::from_str(&data_str) {
-        Ok(addr) => addr,
+    let addr = match dashcore::address::Address::from_str(&data_str) {
+        Ok(addr) => addr.assume_checked(),
         Err(_) => return,
     };
     assert_eq!(addr.to_string(), data_str);
 }
 
-#[cfg(feature = "afl")]
-#[macro_use] extern crate afl;
-#[cfg(feature = "afl")]
-fn main() {
-    fuzz!(|data| {
-        do_test(&data);
-    });
-}
-
-#[cfg(feature = "honggfuzz")]
-#[macro_use] extern crate honggfuzz;
-#[cfg(feature = "honggfuzz")]
 fn main() {
     loop {
         fuzz!(|data| {
@@ -29,7 +19,7 @@ fn main() {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, fuzzing))]
 mod tests {
     fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
         let mut b = 0;
diff --git a/fuzz/fuzz_targets/deserialize_amount.rs b/fuzz/fuzz_targets/dash/deserialize_amount.rs
similarity index 65%
rename from fuzz/fuzz_targets/deserialize_amount.rs
rename to fuzz/fuzz_targets/dash/deserialize_amount.rs
index 9355162db..308a604ac 100644
--- a/fuzz/fuzz_targets/deserialize_amount.rs
+++ b/fuzz/fuzz_targets/dash/deserialize_amount.rs
@@ -1,43 +1,33 @@
-extern crate dashcore;
 use std::str::FromStr;
+
+use honggfuzz::fuzz;
+
 fn do_test(data: &[u8]) {
     let data_str = String::from_utf8_lossy(data);
 
     // signed
-    let samt = match dashcore::util::amount::SignedAmount::from_str(&data_str) {
+    let samt = match dashcore::amount::SignedAmount::from_str(&data_str) {
         Ok(amt) => amt,
         Err(_) => return,
     };
-    let samt_roundtrip = match dashcore::util::amount::SignedAmount::from_str(&samt.to_string()) {
+    let samt_roundtrip = match dashcore::amount::SignedAmount::from_str(&samt.to_string()) {
         Ok(amt) => amt,
         Err(_) => return,
     };
     assert_eq!(samt, samt_roundtrip);
 
     // unsigned
-    let amt = match dashcore::util::amount::Amount::from_str(&data_str) {
+    let amt = match dashcore::amount::Amount::from_str(&data_str) {
         Ok(amt) => amt,
         Err(_) => return,
     };
-    let amt_roundtrip = match dashcore::util::amount::Amount::from_str(&amt.to_string()) {
+    let amt_roundtrip = match dashcore::amount::Amount::from_str(&amt.to_string()) {
         Ok(amt) => amt,
         Err(_) => return,
     };
     assert_eq!(amt, amt_roundtrip);
 }
 
-#[cfg(feature = "afl")]
-#[macro_use] extern crate afl;
-#[cfg(feature = "afl")]
-fn main() {
-    fuzz!(|data| {
-        do_test(&data);
-    });
-}
-
-#[cfg(feature = "honggfuzz")]
-#[macro_use] extern crate honggfuzz;
-#[cfg(feature = "honggfuzz")]
 fn main() {
     loop {
         fuzz!(|data| {
@@ -46,7 +36,7 @@ fn main() {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, fuzzing))]
 mod tests {
     fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
         let mut b = 0;
diff --git a/fuzz/fuzz_targets/deserialize_block.rs b/fuzz/fuzz_targets/dash/deserialize_block.rs
similarity index 67%
rename from fuzz/fuzz_targets/deserialize_block.rs
rename to fuzz/fuzz_targets/dash/deserialize_block.rs
index 8f55c9fe8..248ba0b46 100644
--- a/fuzz/fuzz_targets/deserialize_block.rs
+++ b/fuzz/fuzz_targets/dash/deserialize_block.rs
@@ -1,21 +1,10 @@
-extern crate dashcore;
+use honggfuzz::fuzz;
 
 fn do_test(data: &[u8]) {
-    let _: Result<dashcore::blockdata::block::Block, _>= dashcore::consensus::encode::deserialize(data);
+    let _: Result<dashcore::blockdata::block::Block, _> =
+        dashcore::consensus::encode::deserialize(data);
 }
 
-#[cfg(feature = "afl")]
-#[macro_use] extern crate afl;
-#[cfg(feature = "afl")]
-fn main() {
-    fuzz!(|data| {
-        do_test(&data);
-    });
-}
-
-#[cfg(feature = "honggfuzz")]
-#[macro_use] extern crate honggfuzz;
-#[cfg(feature = "honggfuzz")]
 fn main() {
     loop {
         fuzz!(|data| {
@@ -24,7 +13,7 @@ fn main() {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, fuzzing))]
 mod tests {
     fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
         let mut b = 0;
diff --git a/fuzz/fuzz_targets/dash/deserialize_prefilled_transaction.rs b/fuzz/fuzz_targets/dash/deserialize_prefilled_transaction.rs
new file mode 100644
index 000000000..91e2fdafb
--- /dev/null
+++ b/fuzz/fuzz_targets/dash/deserialize_prefilled_transaction.rs
@@ -0,0 +1,50 @@
+use honggfuzz::fuzz;
+
+fn do_test(data: &[u8]) {
+    // We already fuzz Transactions in `./deserialize_transaction.rs`.
+    let tx_result: Result<dashcore::bip152::PrefilledTransaction, _> =
+        dashcore::consensus::encode::deserialize(data);
+
+    match tx_result {
+        Err(_) => {}
+        Ok(tx) => {
+            let ser = dashcore::consensus::encode::serialize(&tx);
+            assert_eq!(&ser[..], data);
+        }
+    }
+}
+
+fn main() {
+    loop {
+        fuzz!(|data| {
+            do_test(data);
+        });
+    }
+}
+
+#[cfg(all(test, fuzzing))]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'..=b'F' => b |= c - b'A' + 10,
+                b'a'..=b'f' => b |= c - b'a' + 10,
+                b'0'..=b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/fuzz/fuzz_targets/deserialize_psbt.rs b/fuzz/fuzz_targets/dash/deserialize_psbt.rs
similarity index 57%
rename from fuzz/fuzz_targets/deserialize_psbt.rs
rename to fuzz/fuzz_targets/dash/deserialize_psbt.rs
index 2554d2c57..c0a0a581d 100644
--- a/fuzz/fuzz_targets/deserialize_psbt.rs
+++ b/fuzz/fuzz_targets/dash/deserialize_psbt.rs
@@ -1,30 +1,19 @@
-extern crate dashcore;
+use honggfuzz::fuzz;
 
 fn do_test(data: &[u8]) {
-    let psbt: Result<dashcore::util::psbt::PartiallySignedTransaction, _> = dashcore::consensus::encode::deserialize(data);
+    let psbt: Result<dashcore::psbt::PartiallySignedTransaction, _> =
+        dashcore::psbt::Psbt::deserialize(data);
     match psbt {
-        Err(_) => {},
+        Err(_) => {}
         Ok(psbt) => {
-            let ser = dashcore::consensus::encode::serialize(&psbt);
-            let deser: dashcore::util::psbt::PartiallySignedTransaction  = dashcore::consensus::encode::deserialize(&ser).unwrap();
+            let ser = dashcore::psbt::Psbt::serialize(&psbt);
+            let deser = dashcore::psbt::Psbt::deserialize(&ser).unwrap();
             // Since the fuzz data could order psbt fields differently, we compare to our deser/ser instead of data
-            assert_eq!(ser, dashcore::consensus::encode::serialize(&deser));
+            assert_eq!(ser, dashcore::psbt::Psbt::serialize(&deser));
         }
     }
 }
 
-#[cfg(feature = "afl")]
-#[macro_use] extern crate afl;
-#[cfg(feature = "afl")]
-fn main() {
-    fuzz!(|data| {
-        do_test(&data);
-    });
-}
-
-#[cfg(feature = "honggfuzz")]
-#[macro_use] extern crate honggfuzz;
-#[cfg(feature = "honggfuzz")]
 fn main() {
     loop {
         fuzz!(|data| {
@@ -33,7 +22,7 @@ fn main() {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, fuzzing))]
 mod tests {
     fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
         let mut b = 0;
diff --git a/fuzz/fuzz_targets/deserialize_script.rs b/fuzz/fuzz_targets/dash/deserialize_script.rs
similarity index 80%
rename from fuzz/fuzz_targets/deserialize_script.rs
rename to fuzz/fuzz_targets/dash/deserialize_script.rs
index 87c5fb2db..a8959ff97 100644
--- a/fuzz/fuzz_targets/deserialize_script.rs
+++ b/fuzz/fuzz_targets/dash/deserialize_script.rs
@@ -1,12 +1,11 @@
-extern crate dashcore;
-
-use dashcore::util::address::Address;
-use dashcore::network::constants::Network;
+use dashcore::address::Address;
 use dashcore::blockdata::script;
 use dashcore::consensus::encode;
+use dashcore::network::constants::Network;
+use honggfuzz::fuzz;
 
 fn do_test(data: &[u8]) {
-    let s: Result<script::Script, _> = encode::deserialize(data);
+    let s: Result<script::ScriptBuf, _> = encode::deserialize(data);
     if let Ok(script) = s {
         let _: Result<Vec<script::Instruction>, script::Error> = script.instructions().collect();
 
@@ -16,13 +15,15 @@ fn do_test(data: &[u8]) {
                 return;
             }
             match ins.ok().unwrap() {
-                script::Instruction::Op(op) => { b = b.push_opcode(op); }
+                script::Instruction::Op(op) => {
+                    b = b.push_opcode(op);
+                }
                 script::Instruction::PushBytes(bytes) => {
                     // Any one-byte pushes, except -0, which can be interpreted as numbers, should be
                     // reserialized as numbers. (For -1 through 16, this will use special ops; for
                     // others it'll just reserialize them as pushes.)
                     if bytes.len() == 1 && bytes[0] != 0x80 && bytes[0] != 0x00 {
-                        if let Ok(num) = script::read_scriptint(bytes) {
+                        if let Ok(num) = script::read_scriptint(bytes.as_bytes()) {
                             b = b.push_int(num);
                         } else {
                             b = b.push_slice(bytes);
@@ -37,24 +38,12 @@ fn do_test(data: &[u8]) {
         assert_eq!(data, &encode::serialize(&script)[..]);
 
         // Check if valid address and if that address roundtrips.
-        if let Some(addr) = Address::from_script(&script, Network::Dash) {
+        if let Ok(addr) = Address::from_script(&script, Network::Dash) {
             assert_eq!(addr.script_pubkey(), script);
         }
     }
 }
 
-#[cfg(feature = "afl")]
-#[macro_use] extern crate afl;
-#[cfg(feature = "afl")]
-fn main() {
-    fuzz!(|data| {
-        do_test(&data);
-    });
-}
-
-#[cfg(feature = "honggfuzz")]
-#[macro_use] extern crate honggfuzz;
-#[cfg(feature = "honggfuzz")]
 fn main() {
     loop {
         fuzz!(|data| {
@@ -63,7 +52,7 @@ fn main() {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, fuzzing))]
 mod tests {
     fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
         let mut b = 0;
diff --git a/fuzz/fuzz_targets/deserialize_transaction.rs b/fuzz/fuzz_targets/dash/deserialize_transaction.rs
similarity index 80%
rename from fuzz/fuzz_targets/deserialize_transaction.rs
rename to fuzz/fuzz_targets/dash/deserialize_transaction.rs
index 9fdfa9d54..f95fc7b51 100644
--- a/fuzz/fuzz_targets/deserialize_transaction.rs
+++ b/fuzz/fuzz_targets/dash/deserialize_transaction.rs
@@ -1,14 +1,15 @@
-extern crate dashcore;
+use honggfuzz::fuzz;
 
 fn do_test(data: &[u8]) {
-    let tx_result: Result<dashcore::blockdata::transaction::Transaction, _> = dashcore::consensus::encode::deserialize(data);
+    let tx_result: Result<dashcore::blockdata::transaction::Transaction, _> =
+        dashcore::consensus::encode::deserialize(data);
     match tx_result {
-        Err(_) => {},
+        Err(_) => {}
         Ok(mut tx) => {
             let ser = dashcore::consensus::encode::serialize(&tx);
             assert_eq!(&ser[..], data);
             let len = ser.len();
-            let calculated_weight = tx.get_weight();
+            let calculated_weight = tx.weight().to_wu() as usize;
             for input in &mut tx.input {
                 input.witness = dashcore::blockdata::witness::Witness::default();
             }
@@ -21,22 +22,10 @@ fn do_test(data: &[u8]) {
             } else {
                 assert_eq!(no_witness_len * 3 + len, calculated_weight);
             }
-        },
+        }
     }
 }
 
-#[cfg(feature = "afl")]
-#[macro_use] extern crate afl;
-#[cfg(feature = "afl")]
-fn main() {
-    fuzz!(|data| {
-        do_test(&data);
-    });
-}
-
-#[cfg(feature = "honggfuzz")]
-#[macro_use] extern crate honggfuzz;
-#[cfg(feature = "honggfuzz")]
 fn main() {
     loop {
         fuzz!(|data| {
@@ -45,7 +34,7 @@ fn main() {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, fuzzing))]
 mod tests {
     fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
         let mut b = 0;
diff --git a/fuzz/fuzz_targets/deserialize_witness.rs b/fuzz/fuzz_targets/dash/deserialize_witness.rs
similarity index 72%
rename from fuzz/fuzz_targets/deserialize_witness.rs
rename to fuzz/fuzz_targets/dash/deserialize_witness.rs
index 4c2d6b1ec..2bde9327a 100644
--- a/fuzz/fuzz_targets/deserialize_witness.rs
+++ b/fuzz/fuzz_targets/dash/deserialize_witness.rs
@@ -1,28 +1,15 @@
-extern crate dashcore;
-
-use dashcore::consensus::{serialize, deserialize};
 use dashcore::blockdata::witness::Witness;
+use dashcore::consensus::{deserialize, serialize};
+use honggfuzz::fuzz;
 
 fn do_test(data: &[u8]) {
     let w: Result<Witness, _> = deserialize(data);
     if let Ok(witness) = w {
         let serialized = serialize(&witness);
-        assert_eq!(data, serialized);
+        assert_eq!(data, &serialized[..]);
     }
 }
 
-#[cfg(feature = "afl")]
-#[macro_use] extern crate afl;
-#[cfg(feature = "afl")]
-fn main() {
-    fuzz!(|data| {
-        do_test(&data);
-    });
-}
-
-#[cfg(feature = "honggfuzz")]
-#[macro_use] extern crate honggfuzz;
-#[cfg(feature = "honggfuzz")]
 fn main() {
     loop {
         fuzz!(|data| {
@@ -31,7 +18,7 @@ fn main() {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, fuzzing))]
 mod tests {
     fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
         let mut b = 0;
diff --git a/fuzz/fuzz_targets/outpoint_string.rs b/fuzz/fuzz_targets/dash/outpoint_string.rs
similarity index 72%
rename from fuzz/fuzz_targets/outpoint_string.rs
rename to fuzz/fuzz_targets/dash/outpoint_string.rs
index 1f177153a..a4ce7ddbf 100644
--- a/fuzz/fuzz_targets/outpoint_string.rs
+++ b/fuzz/fuzz_targets/dash/outpoint_string.rs
@@ -1,21 +1,22 @@
+use std::str::FromStr;
 
-extern crate dashcore;
-
-use dashcore::blockdata::transaction::outpoint::OutPoint;
+use dashcore::blockdata::transaction::OutPoint;
 use dashcore::consensus::encode;
-
-use std::str::FromStr;
+use honggfuzz::fuzz;
 
 fn do_test(data: &[u8]) {
-    let lowercase: Vec<u8> = data.iter().map(|c| match *c {
-        b'A' => b'a',
-        b'B' => b'b',
-        b'C' => b'c',
-        b'D' => b'd',
-        b'E' => b'e',
-        b'F' => b'f',
-        x => x
-    }).collect();
+    let lowercase: Vec<u8> = data
+        .iter()
+        .map(|c| match *c {
+            b'A' => b'a',
+            b'B' => b'b',
+            b'C' => b'c',
+            b'D' => b'd',
+            b'E' => b'e',
+            b'F' => b'f',
+            x => x,
+        })
+        .collect();
     let data_str = match String::from_utf8(lowercase) {
         Err(_) => return,
         Ok(s) => s,
@@ -33,25 +34,13 @@ fn do_test(data: &[u8]) {
                 let string = deser.to_string();
                 match OutPoint::from_str(&string) {
                     Ok(destring) => assert_eq!(destring, deser),
-                    Err(_) => panic!()
+                    Err(_) => panic!(),
                 }
             }
         }
     }
 }
 
-#[cfg(feature = "afl")]
-#[macro_use] extern crate afl;
-#[cfg(feature = "afl")]
-fn main() {
-    fuzz!(|data| {
-        do_test(&data);
-    });
-}
-
-#[cfg(feature = "honggfuzz")]
-#[macro_use] extern crate honggfuzz;
-#[cfg(feature = "honggfuzz")]
 fn main() {
     loop {
         fuzz!(|data| {
@@ -60,7 +49,7 @@ fn main() {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, fuzzing))]
 mod tests {
     fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
         let mut b = 0;
diff --git a/fuzz/fuzz_targets/dash/script_bytes_to_asm_fmt.rs b/fuzz/fuzz_targets/dash/script_bytes_to_asm_fmt.rs
new file mode 100644
index 000000000..7da53803c
--- /dev/null
+++ b/fuzz/fuzz_targets/dash/script_bytes_to_asm_fmt.rs
@@ -0,0 +1,52 @@
+use std::fmt;
+
+use honggfuzz::fuzz;
+
+// faster than String, we don't need to actually produce the value, just check absence of panics
+struct NullWriter;
+
+impl fmt::Write for NullWriter {
+    fn write_str(&mut self, _s: &str) -> fmt::Result { Ok(()) }
+
+    fn write_char(&mut self, _c: char) -> fmt::Result { Ok(()) }
+}
+
+fn do_test(data: &[u8]) {
+    let mut writer = NullWriter;
+    dashcore::Script::from_bytes(data).fmt_asm(&mut writer).unwrap();
+}
+
+fn main() {
+    loop {
+        fuzz!(|data| {
+            do_test(data);
+        });
+    }
+}
+
+#[cfg(all(test, fuzzing))]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'..=b'F' => b |= c - b'A' + 10,
+                b'a'..=b'f' => b |= c - b'a' + 10,
+                b'0'..=b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/fuzz/fuzz_targets/hashes/cbor.rs b/fuzz/fuzz_targets/hashes/cbor.rs
new file mode 100644
index 000000000..91b107a5a
--- /dev/null
+++ b/fuzz/fuzz_targets/hashes/cbor.rs
@@ -0,0 +1,56 @@
+use dashcore::hashes::{ripemd160, sha1, sha256d, sha512, Hmac};
+use honggfuzz::fuzz;
+use serde::{Deserialize, Serialize};
+
+#[derive(Deserialize, Serialize)]
+struct Hmacs {
+    sha1: Hmac<sha1::Hash>,
+    sha512: Hmac<sha512::Hash>,
+}
+
+#[derive(Deserialize, Serialize)]
+struct Main {
+    hmacs: Hmacs,
+    ripemd: ripemd160::Hash,
+    sha2d: sha256d::Hash,
+}
+
+fn do_test(data: &[u8]) {
+    if let Ok(m) = serde_cbor::from_slice::<Main>(data) {
+        let vec = serde_cbor::to_vec(&m).unwrap();
+        assert_eq!(data, &vec[..]);
+    }
+}
+
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(all(test, fuzzing))]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'..=b'F' => b |= c - b'A' + 10,
+                b'a'..=b'f' => b |= c - b'a' + 10,
+                b'0'..=b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/fuzz/fuzz_targets/hashes/json.rs b/fuzz/fuzz_targets/hashes/json.rs
new file mode 100644
index 000000000..42cb7c732
--- /dev/null
+++ b/fuzz/fuzz_targets/hashes/json.rs
@@ -0,0 +1,56 @@
+use dashcore::hashes::{ripemd160, sha1, sha256d, sha512, Hmac};
+use honggfuzz::fuzz;
+use serde::{Deserialize, Serialize};
+
+#[derive(Deserialize, Serialize)]
+struct Hmacs {
+    sha1: Hmac<sha1::Hash>,
+    sha512: Hmac<sha512::Hash>,
+}
+
+#[derive(Deserialize, Serialize)]
+struct Main {
+    hmacs: Hmacs,
+    ripemd: ripemd160::Hash,
+    sha2d: sha256d::Hash,
+}
+
+fn do_test(data: &[u8]) {
+    if let Ok(m) = serde_json::from_slice::<Main>(data) {
+        let vec = serde_json::to_vec(&m).unwrap();
+        assert_eq!(data, &vec[..]);
+    }
+}
+
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(all(test, fuzzing))]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'..=b'F' => b |= c - b'A' + 10,
+                b'a'..=b'f' => b |= c - b'a' + 10,
+                b'0'..=b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/fuzz/fuzz_targets/hashes/ripemd160.rs b/fuzz/fuzz_targets/hashes/ripemd160.rs
new file mode 100644
index 000000000..69d4e4de3
--- /dev/null
+++ b/fuzz/fuzz_targets/hashes/ripemd160.rs
@@ -0,0 +1,44 @@
+use dashcore::hashes::{ripemd160, Hash, HashEngine};
+use honggfuzz::fuzz;
+
+fn do_test(data: &[u8]) {
+    let mut engine = ripemd160::Hash::engine();
+    engine.input(data);
+    let eng_hash = ripemd160::Hash::from_engine(engine);
+
+    let hash = ripemd160::Hash::hash(data);
+    assert_eq!(&hash[..], &eng_hash[..]);
+}
+
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(all(test, fuzzing))]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'..=b'F' => b |= c - b'A' + 10,
+                b'a'..=b'f' => b |= c - b'a' + 10,
+                b'0'..=b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/fuzz/fuzz_targets/hashes/sha1.rs b/fuzz/fuzz_targets/hashes/sha1.rs
new file mode 100644
index 000000000..9074b846c
--- /dev/null
+++ b/fuzz/fuzz_targets/hashes/sha1.rs
@@ -0,0 +1,44 @@
+use dashcore::hashes::{sha1, Hash, HashEngine};
+use honggfuzz::fuzz;
+
+fn do_test(data: &[u8]) {
+    let mut engine = sha1::Hash::engine();
+    engine.input(data);
+    let eng_hash = sha1::Hash::from_engine(engine);
+
+    let hash = sha1::Hash::hash(data);
+    assert_eq!(&hash[..], &eng_hash[..]);
+}
+
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(all(test, fuzzing))]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'..=b'F' => b |= c - b'A' + 10,
+                b'a'..=b'f' => b |= c - b'a' + 10,
+                b'0'..=b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/fuzz/fuzz_targets/hashes/sha256.rs b/fuzz/fuzz_targets/hashes/sha256.rs
new file mode 100644
index 000000000..6b3905f0b
--- /dev/null
+++ b/fuzz/fuzz_targets/hashes/sha256.rs
@@ -0,0 +1,44 @@
+use dashcore::hashes::{sha256, Hash, HashEngine};
+use honggfuzz::fuzz;
+
+fn do_test(data: &[u8]) {
+    let mut engine = sha256::Hash::engine();
+    engine.input(data);
+    let eng_hash = sha256::Hash::from_engine(engine);
+
+    let hash = sha256::Hash::hash(data);
+    assert_eq!(&hash[..], &eng_hash[..]);
+}
+
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(all(test, fuzzing))]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'..=b'F' => b |= c - b'A' + 10,
+                b'a'..=b'f' => b |= c - b'a' + 10,
+                b'0'..=b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("fff400610004", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/fuzz/fuzz_targets/hashes/sha512.rs b/fuzz/fuzz_targets/hashes/sha512.rs
new file mode 100644
index 000000000..e54d82e38
--- /dev/null
+++ b/fuzz/fuzz_targets/hashes/sha512.rs
@@ -0,0 +1,44 @@
+use dashcore::hashes::{sha512, Hash, HashEngine};
+use honggfuzz::fuzz;
+
+fn do_test(data: &[u8]) {
+    let mut engine = sha512::Hash::engine();
+    engine.input(data);
+    let eng_hash = sha512::Hash::from_engine(engine);
+
+    let hash = sha512::Hash::hash(data);
+    assert_eq!(&hash[..], &eng_hash[..]);
+}
+
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(all(test, fuzzing))]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'..=b'F' => b |= c - b'A' + 10,
+                b'a'..=b'f' => b |= c - b'a' + 10,
+                b'0'..=b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/fuzz/fuzz_targets/hashes/sha512_256.rs b/fuzz/fuzz_targets/hashes/sha512_256.rs
new file mode 100644
index 000000000..3a5c326bf
--- /dev/null
+++ b/fuzz/fuzz_targets/hashes/sha512_256.rs
@@ -0,0 +1,44 @@
+use dashcore::hashes::{sha512_256, Hash, HashEngine};
+use honggfuzz::fuzz;
+
+fn do_test(data: &[u8]) {
+    let mut engine = sha512_256::Hash::engine();
+    engine.input(data);
+    let eng_hash = sha512_256::Hash::from_engine(engine);
+
+    let hash = sha512_256::Hash::hash(data);
+    assert_eq!(&hash[..], &eng_hash[..]);
+}
+
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(all(test, fuzzing))]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'..=b'F' => b |= c - b'A' + 10,
+                b'a'..=b'f' => b |= c - b'a' + 10,
+                b'0'..=b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/fuzz/fuzz_targets/script_bytes_to_asm_fmt.rs b/fuzz/fuzz_targets/script_bytes_to_asm_fmt.rs
deleted file mode 100644
index 82895e9f4..000000000
--- a/fuzz/fuzz_targets/script_bytes_to_asm_fmt.rs
+++ /dev/null
@@ -1,41 +0,0 @@
-extern crate dashcore;
-
-use std::fmt;
-
-// faster than String, we don't need to actually produce the value, just check absence of panics
-struct NullWriter;
-
-impl fmt::Write for NullWriter {
-    fn write_str(&mut self, _s: &str) -> fmt::Result {
-        Ok(())
-    }
-
-    fn write_char(&mut self, _c: char) -> fmt::Result {
-        Ok(())
-    }
-}
-
-fn do_test(data: &[u8]) {
-    let mut writer = NullWriter;
-    dashcore::Script::bytes_to_asm_fmt(data, &mut writer);
-}
-
-#[cfg(feature = "afl")]
-#[macro_use] extern crate afl;
-#[cfg(feature = "afl")]
-fn main() {
-    fuzz!(|data| {
-        do_test(&data);
-    });
-}
-
-#[cfg(feature = "honggfuzz")]
-#[macro_use] extern crate honggfuzz;
-#[cfg(feature = "honggfuzz")]
-fn main() {
-    loop {
-        fuzz!(|data| {
-            do_test(data);
-        });
-    }
-}
diff --git a/fuzz/fuzz_targets/uint128_fuzz.rs b/fuzz/fuzz_targets/uint128_fuzz.rs
deleted file mode 100644
index d48d70eea..000000000
--- a/fuzz/fuzz_targets/uint128_fuzz.rs
+++ /dev/null
@@ -1,113 +0,0 @@
-extern crate dashcore;
-use std::str::FromStr;
-use std::convert::Into;
-
-fn do_test(data: &[u8]) {
-    macro_rules! read_ints {
-        ($start: expr) => { {
-            let mut native = 0;
-            for c in data[$start..$start + 16].iter() {
-                native <<= 8;
-                native |= (*c) as u128;
-            }
-            // Note BE:
-            let uint128 = dashcore::util::uint::Uint128::from(&[native as u64, (native >> 8*8) as u64][..]);
-
-            // Checking two conversion methods against each other
-            let mut slice = [0u8; 16];
-            slice.copy_from_slice(&data[$start..$start + 16]);
-            assert_eq!(uint128, dashcore::util::uint::Uint128::from_be_bytes(slice));
-
-            (native, uint128)
-        } }
-    }
-    macro_rules! check_eq {
-        ($native: expr, $uint: expr) => { {
-            assert_eq!(&[$native as u64, ($native >> 8*8) as u64], $uint.as_bytes());
-        } }
-    }
-
-    if data.len() != 16*2 { return; }
-    let (a_native, a) = read_ints!(0);
-
-    // Checks using only a:
-    for i in 0..128 {
-        check_eq!(a_native << i, a << i);
-        check_eq!(a_native >> i, a >> i);
-    }
-    assert_eq!(a_native as u64, a.low_u64());
-    assert_eq!(a_native as u32, a.low_u32());
-    assert_eq!(128 - a_native.leading_zeros() as usize, a.bits());
-    assert_eq!(a_native as u64, dashcore::util::uint::Uint128::from_u64(a_native as u64).unwrap().low_u64());
-
-    let mut a_inc = a.clone();
-    a_inc.increment();
-    check_eq!(a_native.wrapping_add(1), a_inc);
-
-    // Checks with two numbers:
-    let (b_native, b) = read_ints!(16);
-
-    check_eq!(a_native.wrapping_add(b_native), a + b);
-    check_eq!(a_native.wrapping_sub(b_native), a - b);
-    if b_native != 0 {
-        check_eq!(a_native.wrapping_div(b_native), a / b);
-        check_eq!(a_native.wrapping_rem(b_native), a % b);
-    }
-    check_eq!(a_native.wrapping_mul(b_native), a * b);
-    check_eq!(a_native & b_native, a & b);
-    check_eq!(a_native | b_native, a | b);
-    check_eq!(a_native ^ b_native, a ^ b);
-    check_eq!(a_native.wrapping_mul((b_native as u32) as u128), a.mul_u32(b.low_u32()));
-
-    assert_eq!(a_native > b_native, a > b);
-    assert_eq!(a_native >= b_native, a >= b);
-    assert_eq!(a_native < b_native, a < b);
-    assert_eq!(a_native <= b_native, a <= b);
-}
-
-#[cfg(feature = "afl")]
-#[macro_use] extern crate afl;
-#[cfg(feature = "afl")]
-fn main() {
-    fuzz!(|data| {
-        do_test(&data);
-    });
-}
-
-#[cfg(feature = "honggfuzz")]
-#[macro_use] extern crate honggfuzz;
-#[cfg(feature = "honggfuzz")]
-fn main() {
-    loop {
-        fuzz!(|data| {
-            do_test(data);
-        });
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
-        let mut b = 0;
-        for (idx, c) in hex.as_bytes().iter().enumerate() {
-            b <<= 4;
-            match *c {
-                b'A'..=b'F' => b |= c - b'A' + 10,
-                b'a'..=b'f' => b |= c - b'a' + 10,
-                b'0'..=b'9' => b |= c - b'0',
-                _ => panic!("Bad hex"),
-            }
-            if (idx & 1) == 1 {
-                out.push(b);
-                b = 0;
-            }
-        }
-    }
-
-    #[test]
-    fn duplicate_crash() {
-        let mut a = Vec::new();
-        extend_vec_from_hex("100000a70000000000000000000000000000000000000000000000000000000054", &mut a);
-        super::do_test(&a);
-    }
-}
diff --git a/fuzz/generate-files.sh b/fuzz/generate-files.sh
new file mode 100755
index 000000000..84a86403f
--- /dev/null
+++ b/fuzz/generate-files.sh
@@ -0,0 +1,100 @@
+#!/usr/bin/env bash
+
+set -e
+
+REPO_DIR=$(git rev-parse --show-toplevel)
+
+# shellcheck source=./fuzz-util.sh
+source "$REPO_DIR/fuzz/fuzz-util.sh"
+
+# 1. Generate fuzz/Cargo.toml
+cat > "$REPO_DIR/fuzz/Cargo.toml" <<EOF
+[package]
+name = "dash-fuzz"
+edition = "2018"
+version = "0.0.1"
+authors = ["Generated by fuzz/generate-files.sh"]
+publish = false
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+honggfuzz = { version = "0.5", default-features = false }
+dash = { path = "../dash", features = [ "serde" ] }
+
+serde = { version = "1.0.103", features = [ "derive" ] }
+serde_json = "1.0"
+serde_cbor = "0.9"
+EOF
+
+for targetFile in $(listTargetFiles); do
+    targetName=$(targetFileToName "$targetFile")
+    cat >> "$REPO_DIR/fuzz/Cargo.toml" <<EOF
+
+[[bin]]
+name = "$targetName"
+path = "$targetFile"
+EOF
+done
+
+# 2. Generate .github/workflows/fuzz.yml
+cat > "$REPO_DIR/.github/workflows/fuzz.yml" <<EOF
+# Automatically generated by fuzz/generate-files.sh
+name: Fuzz
+
+on:
+  push:
+    branches:
+      - master
+      - 'test-ci/**'
+  pull_request:
+
+jobs:
+  fuzz:
+    if: \${{ !github.event.act }}
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+      matrix:
+        fuzz_target: [
+$(for name in $(listTargetNames); do echo "$name,"; done)
+        ]
+    steps:
+      - name: Install test dependencies
+        run: sudo apt-get update -y && sudo apt-get install -y binutils-dev libunwind8-dev libcurl4-openssl-dev libelf-dev libdw-dev cmake gcc libiberty-dev
+      - uses: actions/checkout@v2
+      - uses: actions/cache@v2
+        id: cache-fuzz
+        with:
+          path: |
+            ~/.cargo/bin
+            fuzz/target
+            target
+          key: cache-\${{ matrix.target }}-\${{ hashFiles('**/Cargo.toml','**/Cargo.lock') }}
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: 1.58
+          override: true
+          profile: minimal
+      - name: fuzz
+        run: cd fuzz && ./fuzz.sh "\${{ matrix.fuzz_target }}"
+      - run: echo "\${{ matrix.fuzz_target }}" >executed_\${{ matrix.fuzz_target }}
+      - uses: actions/upload-artifact@v2
+        with:
+          name: executed_\${{ matrix.fuzz_target }}
+          path: executed_\${{ matrix.fuzz_target }}
+
+  verify-execution:
+    if: \${{ !github.event.act }}
+    needs: fuzz
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/download-artifact@v2
+      - name: Display structure of downloaded files
+        run: ls -R
+      - run: find executed_* -type f -exec cat {} + | sort > executed
+      - run: source ./fuzz/fuzz-util.sh && listTargetNames | sort | diff - executed
+EOF
+
diff --git a/fuzz/travis-fuzz.sh b/fuzz/travis-fuzz.sh
deleted file mode 100755
index 1f75c9c0d..000000000
--- a/fuzz/travis-fuzz.sh
+++ /dev/null
@@ -1,38 +0,0 @@
-#!/bin/bash
-set -e
-
-# Check that input files are correct Windows file names
-incorrectFilenames=$(find . -type f -name "*,*" -o -name "*:*" -o -name "*<*" -o -name "*>*" -o -name "*|*" -o -name "*\?*" -o -name "*\**" -o -name "*\"*" | wc -l)
-
-if [ ${incorrectFilenames} -gt 0 ]; then
-	exit 2
-fi
-
-if [ "$1" == "" ]; then
-	TARGETS=fuzz_targets/*
-else
-	TARGETS=fuzz_targets/"$1".rs
-fi
-
-cargo --version
-rustc --version
-
-# Testing
-cargo install --force honggfuzz --no-default-features
-for TARGET in $TARGETS; do
-	echo "Fuzzing target $TARGET"
-	FILENAME=$(basename $TARGET)
-	FILE="${FILENAME%.*}"
-	if [ -d hfuzz_input/$FILE ]; then
-	    HFUZZ_INPUT_ARGS="-f hfuzz_input/$FILE/input"
-	fi
-	HFUZZ_BUILD_ARGS="--features honggfuzz_fuzz" HFUZZ_RUN_ARGS="--run_time 30 --exit_upon_crash -v $HFUZZ_INPUT_ARGS" cargo hfuzz run $FILE
-
-	if [ -f hfuzz_workspace/$FILE/HONGGFUZZ.REPORT.TXT ]; then
-		cat hfuzz_workspace/$FILE/HONGGFUZZ.REPORT.TXT
-		for CASE in hfuzz_workspace/$FILE/SIG*; do
-			cat $CASE | xxd -p
-		done
-		exit 1
-	fi
-done
diff --git a/hashes/CHANGELOG.md b/hashes/CHANGELOG.md
new file mode 100644
index 000000000..fa3a4db9f
--- /dev/null
+++ b/hashes/CHANGELOG.md
@@ -0,0 +1,177 @@
+# 0.12.0 - 2023-03-05
+
+0.12 is a significant release. We pulled the repository into the rust-bitcoin
+repo to improve our integration testing and to get more eyes on this crate. We
+began the process of replacing the hex functionality in this crate with a more
+performant, dedicated crate, and otherwise cleaning up the API as we look forward
+to 1.0.
+
+* Move crate from [original repo](https://github.com/rust-bitcoin/dashcore_hashes) to the
+`rust-bitcoin` repository. Commit history was lost during move, for commit history see the original
+repository. Tip of dashcore_hashes:master at time of import: 54c16249e06cc6b7870c7fc07d90f489d82647c7
+* [Remove `Deref` impls for all hashes](https://github.com/rust-bitcoin/rust-bitcoin/pull/1450)
+* [Add `AsRef` impls for all hashes from fixed-size arrays](https://github.com/rust-bitcoin/rust-bitcoin/pull/1593)
+* [Add the `sha512_256` hash](https://github.com/rust-bitcoin/rust-bitcoin/pull/1413)
+* [Remove the `ToHex` trait in favor of `DisplayHex` and `fmt::Display`](https://github.com/rust-bitcoin/rust-bitcoin/pull/1531)
+* [Remove the now-unused `HexWriter` object](https://github.com/rust-bitcoin/rust-bitcoin/pull/1572)
+* [nostd: `alloc` feature no longer enables `core2`](https://github.com/rust-bitcoin/rust-bitcoin/pull/1612)
+* [Rewrite `hash_newtype` macro with new syntax](https://github.com/rust-bitcoin/rust-bitcoin/pull/1659)
+* [Rename `Hash::Inner` to `Hash::Bytes`, 'Hash::*_inner` and several related conversion methods](https://github.com/rust-bitcoin/rust-bitcoin/pull/1577)
+
+
+# 0.11.0 - 2022-06-25
+
+The major change in this version is the increase of the Minimum Supported Rust Version (MSRV) from
+1.29 to 1.41.1. This is a big change because it introduces Rust Edition 2018 to the codebase along
+with all the benefits that brings. We also did a bunch of optimisations to speed up encoding and
+decoding hex strings.
+
+## Breaking changes
+
+* [Enable edition 2018 and bump MSRV to Rust 1.41.1](https://github.com/rust-bitcoin/dashcore_hashes/pull/136)
+
+## New features/APIs
+
+* [Add `all_zeros` to `Hash` trait](https://github.com/rust-bitcoin/dashcore_hashes/pull/148)
+* [Implement `Write` on `HmacEngine`](https://github.com/rust-bitcoin/dashcore_hashes/pull/133)
+* [Introduce `HexWriter`](https://github.com/rust-bitcoin/dashcore_hashes/pull/156), makes serialising hex faster
+* [Implement `Read` on `HexIterator`](https://github.com/rust-bitcoin/dashcore_hashes/pull/135), makes deserialising hex faster
+
+## Other improvements
+
+* Use `rotate_left` [instead of custom macro](https://github.com/rust-bitcoin/dashcore_hashes/pull/162)
+* [Enable clippy on CI](https://github.com/rust-bitcoin/dashcore_hashes/pull/152)
+* Various docs fixes
+* [Improve feature test coverage](https://github.com/rust-bitcoin/dashcore_hashes/pull/147)
+* [Add a disabled `rustfmt.toml`](https://github.com/rust-bitcoin/dashcore_hashes/pull/141) to improve interaction with auto-formatting in editors
+
+
+# 0.10.0 - 2021-07-05
+
+* Increase `core2` to released version of 0.3.0
+
+# 0.9.7 - 2021-06-17
+
+* Introduce `alloc` feature and `core2` dependency for nostd support (this feature has MSRV of 1.36 rather than 1.29)
+
+# 0.9.6 - 2021-05-03
+
+* Re-export `core` as `_export::_core`. This resolves an issue when calling several exported macros with the `std` feature.
+
+# 0.9.5 - 2021-04-28
+
+* Add [`#[repr(transparent)]` to all newtype wrappers](https://github.com/rust-bitcoin/dashcore_hashes/pull/108/)
+* Add [missing `#derive`s](https://github.com/rust-bitcoin/dashcore_hashes/pull/110/)
+* Replace `fuzztarget` feature with [use of `cfg(fuzzing)`](https://github.com/rust-bitcoin/dashcore_hashes/pull/111/)
+* Use [`core` rather than `std`](https://github.com/rust-bitcoin/dashcore_hashes/pull/118/) and [fix `no_std` compilation](https://github.com/rust-bitcoin/dashcore_hashes/pull/122/)
+
+Note that we have stopped re-exporting the `core` crate when compiling without `std`. This is technically a breaking change but it is hard to imagine what user might be affected.
+
+# 0.9.4 - 2020-10-23
+
+* Add `Hmac::from_inner_engines`
+
+# 0.9.3 - 2020-10-19
+
+* More serde macro fixes
+
+# 0.9.2 - 2020-10-18
+
+* Fix rustc 1.29.0 downstream issues with serde macros
+
+# 0.9.2 - 2020-10-16
+
+* Fix visibility issue with serde macros
+
+# 0.9.1 - 2020-10-07
+
+* Add `FromStr` impl to `sha256t::Hash`
+* Fix `Hash::engine()` implementation for hash newtypes
+* Add `sha256t_hash_newtype!` macro for creating tagged hashes
+
+# 0.9.0 - 2020-08-27
+
+* **Update MSRV to 1.29.0**
+
+# 0.8.0 - 2020-08-26
+
+* Add `as_inner` method to `Hash` trait
+* Add `n_bytes_hashed` to `HashEngine` trait
+
+# 0.7.6 - 2020-04-05
+
+* Support hash newtypes with reversed hex serialization.
+
+# 0.7.5 - 2020-04-02
+
+* Add `sha256t` module for SHA-256-based tagged hashes.
+* Add `FromStr` for hash newtypes.
+* Add `from_hash` for hash newtypes.
+
+# 0.7.3 - 2019-12-18
+
+* Add `as_hash(&self) -> <inner>` method to hash newtypes.
+
+# 0.7.2 - 2019-11-29
+
+* Make the inner variable of `sha256::Midstat` public
+* Drop the `byteorder` dependency in favor of manual endianness implementations
+(later this will be in stdlib so we can drop even that)
+* Fix the `hash_newtype` macro, which did not compile before
+
+# 0.7.1 - 2019-08-14
+
+* Add hash_newtype macro that allows third parties to create newtype structs.
+
+# 0.7.0 - 2019-07-19
+
+* Add `hex::Error` type for errors generated by the `hex` module.
+
+# 0.6.0 - 2019-07-10
+
+* Add `no_std` support, rearrange traits to not depend on `io::Write`
+
+# 0.5.0 - 2019-06-28
+
+* Fix panic when parsing hashes that contain multibyte characters
+* Add `FromStr` to all hashes which hex-parses them
+
+# 0.4.0 - 2019-06-23
+
+* [Add `from_inner` method](https://github.com/rust-bitcoin/dashcore_hashes/pull/20) to all hashes
+* [Update `FromHex` trait](https://github.com/rust-bitcoin/dashcore_hashes/pull/40) to require `from_byte_iter` method rather than `from_hex` be implemented
+* Make `Hmac` midstate [an actual HMAC midstate](https://github.com/rust-bitcoin/dashcore_hashes/pull/43)
+* Allow `Display` [of truncated hashes](https://github.com/rust-bitcoin/dashcore_hashes/pull/9)
+* Require [using a constructor for `HexIterator`](https://github.com/rust-bitcoin/dashcore_hashes/pull/44) and then [clean up the internals](https://github.com/rust-bitcoin/dashcore_hashes/pull/47)
+* [Strongly type `sha256::Midstate`](https://github.com/rust-bitcoin/dashcore_hashes/pull/39) to allow independent serialization
+* Add [siphash24 module](https://github.com/rust-bitcoin/dashcore_hashes/pull/46)
+
+# 0.3.2 - 2019-03-20
+
+* Implement the `FromHex` trait on [many more types](https://github.com/rust-bitcoin/dashcore_hashes/pull/38)
+
+# 0.3.1 - 2019-03-04
+
+* [Fix serde serialization](https://github.com/rust-bitcoin/dashcore_hashes/pull/36)
+
+# 0.3.0 - 2019-01-23
+
+* Bump minimum required rustc version to 1.22.0
+* Fixed serde deserialization into owned string that previously caused panics
+  when doing round-trip (de)serialization
+* `HashEngine::block_size()` and `Hash::len()` are now associated constants
+  `HashEngine::BLOCK_SIZE` and `Hash::LEN`
+* Removed `block_size()` method from `Hash` trait. It is still available as
+  `<T as Hash>::Engine::BLOCK_SIZE`
+
+# 0.2.0 - 2019-01-15
+
+* Add a constant-time comparison function
+* Simplify `io::Write::write` implementations by having them do only partial writes
+* Add fuzzing support
+* Allow `Hash`es to be borrowed as `[u8]`
+* Replace public `Hash` inners with `into_inner` method
+
+# 0.1.0 - 2018-12-08
+
+* Initial release
diff --git a/hashes/Cargo.toml b/hashes/Cargo.toml
new file mode 100644
index 000000000..ff91c3c41
--- /dev/null
+++ b/hashes/Cargo.toml
@@ -0,0 +1,46 @@
+[package]
+name = "dashcore_hashes"
+version = "0.12.0"
+authors = ["Samuel Westrich <sam@dash.org>"]
+license = "CC0-1.0"
+repository = "https://github.com/rust-dashcore/dash_hashes/"
+documentation = "https://docs.rs/dash_hashes/"
+description = "Hash functions used by the rust-dash eccosystem"
+categories = ["algorithms"]
+keywords = [ "crypto", "dash", "hash", "digest" ]
+readme = "README.md"
+edition = "2018"
+exclude = ["tests", "contrib"]
+
+[features]
+default = ["std"]
+std = ["alloc", "internals/std"]
+alloc = ["internals/alloc"]
+schemars = ["actual-schemars", "dyn-clone"]
+serde-std = ["serde/std"]
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[dependencies]
+internals = { path = "../internals", package = "dashcore-private", version = "0.1.0" }
+
+core2 = { version = "0.3.0", default_features = false, optional = true }
+# Only enable this if you explicitly do not want to use "std", otherwise enable "serde-std".
+serde = { version = "1.0", default-features = false, optional = true }
+# Do NOT use this as a feature! Use the `schemars` feature instead. Can only be used with "std" enabled.
+actual-schemars = { package = "schemars", version = "<=0.8.3", optional = true }
+# Do NOT enable this dependency, this is just to pin dyn-clone (transitive dep from schemars)
+# because 1.0.8 does not build with Rust 1.41.1 (because of useage of `Arc::as_ptr`).
+dyn-clone = { version = "<=1.0.7", default_features = false, optional = true }
+secp256k1 = { default-features = false, features = ["bitcoin_hashes"], version= "0.27.0" }
+
+rs-x11-hash = ">=0.1.5"
+
+[dev-dependencies]
+serde_test = "1.0"
+serde_json = "1.0"
+
+[target.wasm32-unknown-unknown.dev-dependencies]
+wasm-bindgen-test = "0.3"
diff --git a/hashes/README.md b/hashes/README.md
new file mode 100644
index 000000000..888a1f735
--- /dev/null
+++ b/hashes/README.md
@@ -0,0 +1,34 @@
+[![Status](https://travis-ci.org/rust-bitcoin/dashcore_hashes.png?branch=master)](https://travis-ci.org/rust-bitcoin/dashcore_hashes)
+
+# Bitcoin Hashes Library
+
+This is a simple, no-dependency library which implements the hash functions
+needed by Bitcoin. These are SHA1, SHA256, SHA256d, SHA512, and RIPEMD160. As an
+ancilliary thing, it exposes hexadecimal serialization and deserialization,
+since these are needed to display hashes anway.
+
+[Documentation](https://docs.rs/dashcore_hashes/)
+
+## Minimum Supported Rust Version (MSRV)
+
+This library should always compile with any combination of features on **Rust 1.48.0**.
+
+## Contributions
+
+Contributions are welcome, including additional hash function implementations.
+
+### Githooks
+
+To assist devs in catching errors _before_ running CI we provide some githooks. If you do not
+already have locally configured githooks you can use the ones in this repository by running, in the
+root directory of the repository:
+```
+git config --local core.hooksPath githooks/
+```
+
+Alternatively add symlinks in your `.git/hooks` directory to any of the githooks we provide.
+
+### Running Benchmarks
+
+We use a custom Rust compiler configuration conditional to guard the bench mark code. To run the
+bench marks use: `RUSTFLAGS='--cfg=bench' cargo +nightly bench`.
diff --git a/hashes/contrib/test.sh b/hashes/contrib/test.sh
new file mode 100755
index 000000000..b934976d1
--- /dev/null
+++ b/hashes/contrib/test.sh
@@ -0,0 +1,126 @@
+#!/usr/bin/env bash
+
+set -ex
+
+FEATURES="serde serde-std std core2"
+
+if [ "$DO_ALLOC_TESTS" = true ]; then
+	FEATURES="$FEATURES alloc"
+fi
+
+cargo --version
+rustc --version
+
+# Work out if we are using a nightly toolchain.
+NIGHTLY=false
+if cargo --version | grep nightly >/dev/null; then
+    NIGHTLY=true
+fi
+
+# Pin dependencies as required if we are using MSRV toolchain.
+if cargo --version | grep "1\.48"; then
+    # 1.0.157 uses syn 2.0 which requires edition 2021
+    cargo update -p serde --precise 1.0.156
+fi
+
+# Make all cargo invocations verbose
+export CARGO_TERM_VERBOSE=true
+
+# Defaults / sanity checks
+cargo build
+cargo test
+
+if [ "$DO_LINT" = true ]
+then
+    cargo clippy --all-features --all-targets -- -D warnings
+fi
+
+if [ "$DO_FEATURE_MATRIX" = true ]; then
+    cargo build --no-default-features
+    cargo test --no-default-features
+
+    # All features
+    cargo build --no-default-features --features="$FEATURES"
+    cargo test --no-default-features --features="$FEATURES"
+    # Single features
+    for feature in ${FEATURES}
+    do
+        cargo build --no-default-features --features="$feature"
+        cargo test --no-default-features --features="$feature"
+		# All combos of two features
+		for featuretwo in ${FEATURES}; do
+			cargo build --no-default-features --features="$feature $featuretwo"
+			cargo test --no-default-features --features="$feature $featuretwo"
+		done
+    done
+
+    # Other combos
+    cargo test --no-default-features --features="std,schemars"
+fi
+
+REPO_DIR=$(git rev-parse --show-toplevel)
+
+if [ "$DO_SCHEMARS_TESTS" = true ]; then
+    pushd "$REPO_DIR/hashes/extended_tests/schemars" > /dev/null
+    cargo test
+    popd > /dev/null
+fi
+
+# Build the docs if told to (this only works with the nightly toolchain)
+if [ "$DO_DOCSRS" = true ]; then
+    RUSTDOCFLAGS="--cfg docsrs -D warnings -D rustdoc::broken-intra-doc-links" cargo +nightly doc --all-features
+fi
+
+# Build the docs with a stable toolchain, in unison with the DO_DOCSRS command
+# above this checks that we feature guarded docs imports correctly.
+if [ "$DO_DOCS" = true ]; then
+    RUSTDOCFLAGS="-D warnings" cargo +stable doc --all-features
+fi
+
+# Webassembly stuff
+if [ "$DO_WASM" = true ]; then
+    clang --version &&
+    CARGO_TARGET_DIR=wasm cargo install --force wasm-pack &&
+    printf '\n[lib]\ncrate-type = ["cdylib", "rlib"]\n' >> Cargo.toml &&
+    CC=clang-9 wasm-pack build &&
+    CC=clang-9 wasm-pack test --node;
+fi
+
+# Address Sanitizer
+if [ "$DO_ASAN" = true ]; then
+    cargo clean
+    CC='clang -fsanitize=address -fno-omit-frame-pointer'                                        \
+    RUSTFLAGS='-Zsanitizer=address -Clinker=clang -Cforce-frame-pointers=yes'                    \
+    ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' \
+    cargo test --lib --no-default-features --features="$FEATURES" -Zbuild-std --target x86_64-unknown-linux-gnu
+    cargo clean
+    CC='clang -fsanitize=memory -fno-omit-frame-pointer'                                         \
+    RUSTFLAGS='-Zsanitizer=memory -Zsanitizer-memory-track-origins -Cforce-frame-pointers=yes'   \
+    cargo test --lib --no-default-features --features="$FEATURES" -Zbuild-std --target x86_64-unknown-linux-gnu
+fi
+
+# Run formatter if told to.
+if [ "$DO_FMT" = true ]; then
+    if [ "$NIGHTLY" = false ]; then
+        echo "DO_FMT requires a nightly toolchain (consider using RUSTUP_TOOLCHAIN)"
+        exit 1
+    fi
+    rustup component add rustfmt
+    cargo fmt --check
+fi
+
+# Bench if told to, only works with non-stable toolchain (nightly, beta).
+if [ "$DO_BENCH" = true ]
+then
+    if [ "$NIGHTLY" = false ]
+    then
+        if [ -n "$RUSTUP_TOOLCHAIN" ]
+        then
+            echo "RUSTUP_TOOLCHAIN is set to a non-nightly toolchain but DO_BENCH requires a nightly toolchain"
+        else
+            echo "DO_BENCH requires a nightly toolchain"
+        fi
+        exit 1
+    fi
+    RUSTFLAGS='--cfg=bench' cargo bench
+fi
diff --git a/hashes/embedded/Cargo.toml b/hashes/embedded/Cargo.toml
new file mode 100644
index 000000000..75cce7139
--- /dev/null
+++ b/hashes/embedded/Cargo.toml
@@ -0,0 +1,32 @@
+[package]
+authors = ["Riccardo Casatta <riccardo@casatta.it>"]
+edition = "2018"
+readme = "README.md"
+name = "embedded"
+version = "0.1.0"
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[features]
+alloc = ["alloc-cortex-m", "dashcore_hashes/alloc"]
+
+[dependencies]
+cortex-m = "0.6.0"
+cortex-m-rt = "0.6.10"
+cortex-m-semihosting = "0.3.3"
+panic-halt = "0.2.0"
+alloc-cortex-m = { version = "0.4.1", optional = true }
+dashcore_hashes = { path="../", default-features = false, features = ["core2"] }
+core2 = { version = "0.3.0", default_features = false }
+
+[[bin]]
+name = "embedded"
+test = false
+bench = false
+
+[profile.release]
+codegen-units = 1 # better optimizations
+debug = true # symbols are nice and they don't increase the size on Flash
+lto = true # better optimizations
diff --git a/hashes/embedded/memory.x b/hashes/embedded/memory.x
new file mode 100644
index 000000000..95de161be
--- /dev/null
+++ b/hashes/embedded/memory.x
@@ -0,0 +1,5 @@
+MEMORY
+{
+  FLASH : ORIGIN = 0x00000000, LENGTH = 256K
+  RAM : ORIGIN = 0x20000000, LENGTH = 64K
+}
diff --git a/hashes/embedded/src/main.rs b/hashes/embedded/src/main.rs
new file mode 100644
index 000000000..3d52aa3d4
--- /dev/null
+++ b/hashes/embedded/src/main.rs
@@ -0,0 +1,74 @@
+#![cfg_attr(feature = "alloc", feature(alloc_error_handler))]
+#![no_std]
+#![no_main]
+
+#[macro_use]
+extern crate dashcore_hashes;
+
+#[cfg(feature = "alloc")] extern crate alloc;
+#[cfg(feature = "alloc")] use alloc_cortex_m::CortexMHeap;
+#[cfg(feature = "alloc")] use core::alloc::Layout;
+#[cfg(feature = "alloc")] use cortex_m::asm;
+#[cfg(feature = "alloc")] use alloc::string::ToString;
+
+use dashcore_hashes::{sha256, Hash, HashEngine};
+use core2::io::Write;
+use core::str::FromStr;
+use cortex_m_rt::entry;
+use cortex_m_semihosting::{debug, hprintln};
+use panic_halt as _;
+
+hash_newtype! {
+    struct TestType(sha256::Hash);
+}
+
+// this is the allocator the application will use
+#[cfg(feature = "alloc")]
+#[global_allocator]
+static ALLOCATOR: CortexMHeap = CortexMHeap::empty();
+
+#[cfg(feature = "alloc")]
+const HEAP_SIZE: usize = 1024; // in bytes
+
+#[entry]
+fn main() -> ! {
+    #[cfg(feature = "alloc")]
+    unsafe { ALLOCATOR.init(cortex_m_rt::heap_start() as usize, HEAP_SIZE) }
+
+    let mut engine = TestType::engine();
+    engine.write_all(b"abc").unwrap();
+    check_result(engine);
+
+    let mut engine = TestType::engine();
+    engine.input(b"abc");
+    check_result(engine);
+
+    debug::exit(debug::EXIT_SUCCESS);
+    loop {}
+}
+
+fn check_result(engine: sha256::HashEngine) {
+    let hash = TestType::from_engine(engine);
+
+    let hash_check =
+        TestType::from_str("ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad")
+            .unwrap();
+    hprintln!("hash:{} hash_check:{}", hash, hash_check).unwrap();
+    if hash != hash_check {
+        debug::exit(debug::EXIT_FAILURE);
+    }
+
+    #[cfg(feature = "alloc")]
+    if hash.to_string() != hash_check.to_string() {
+        debug::exit(debug::EXIT_FAILURE);
+    }
+}
+
+// define what happens in an Out Of Memory (OOM) condition
+#[cfg(feature = "alloc")]
+#[alloc_error_handler]
+fn alloc_error(_layout: Layout) -> ! {
+    asm::bkpt();
+
+    loop {}
+}
diff --git a/hashes/extended_tests/schemars/Cargo.toml b/hashes/extended_tests/schemars/Cargo.toml
new file mode 100644
index 000000000..bf28e595a
--- /dev/null
+++ b/hashes/extended_tests/schemars/Cargo.toml
@@ -0,0 +1,20 @@
+[package]
+name = "schemars"
+version = "0.1.0"
+authors = ["Jeremy Rubin <j@rubin.io>"]
+edition = "2018"
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[dependencies.dashcore_hashes]
+path = "../.."
+features = ['schemars', 'serde']
+
+[dependencies]
+jsonschema-valid = "^0.4.0"
+serde = { version = "1.0", default-features = false}
+schemars = { version = "<=0.8.3"}
+serde_test = "1.0"
+serde_json = "1.0"
diff --git a/hashes/extended_tests/schemars/src/main.rs b/hashes/extended_tests/schemars/src/main.rs
new file mode 100644
index 000000000..dd68ec9d3
--- /dev/null
+++ b/hashes/extended_tests/schemars/src/main.rs
@@ -0,0 +1,191 @@
+fn main() {}
+#[cfg(test)]
+mod tests {
+    use dashcore_hashes::*;
+
+    #[test]
+    fn hash160() {
+        static HASH_BYTES: [u8; 20] = [
+            0x13, 0x20, 0x72, 0xdf, 0x69, 0x09, 0x33, 0x83, 0x5e, 0xb8, 0xb6, 0xad, 0x0b, 0x77,
+            0xe7, 0xb6, 0xf1, 0x4a, 0xca, 0xd7,
+        ];
+
+        let hash = hash160::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        let js = serde_json::from_str(&serde_json::to_string(&hash).unwrap()).unwrap();
+        let s = schemars::schema_for!(hash160::Hash);
+        let schema = serde_json::from_str(&serde_json::to_string(&s).unwrap()).unwrap();
+        assert!(jsonschema_valid::Config::from_schema(&schema, None)
+            .unwrap()
+            .validate(&js)
+            .is_ok());
+    }
+
+    #[test]
+    fn hmac_sha512() {
+        static HASH_BYTES: [u8; 64] = [
+            0x8b, 0x41, 0xe1, 0xb7, 0x8a, 0xd1, 0x15, 0x21, 0x11, 0x3c, 0x52, 0xff, 0x18, 0x2a,
+            0x1b, 0x8e, 0x0a, 0x19, 0x57, 0x54, 0xaa, 0x52, 0x7f, 0xcd, 0x00, 0xa4, 0x11, 0x62,
+            0x0b, 0x46, 0xf2, 0x0f, 0xff, 0xfb, 0x80, 0x88, 0xcc, 0xf8, 0x54, 0x97, 0x12, 0x1a,
+            0xd4, 0x49, 0x9e, 0x08, 0x45, 0xb8, 0x76, 0xf6, 0xdd, 0x66, 0x40, 0x08, 0x8a, 0x2f,
+            0x0b, 0x2d, 0x8a, 0x60, 0x0b, 0xdf, 0x4c, 0x0c,
+        ];
+
+        let hash = Hmac::<sha512::Hash>::from_slice(&HASH_BYTES).expect("right number of bytes");
+        let js = serde_json::from_str(&serde_json::to_string(&hash).unwrap()).unwrap();
+        let s = schemars::schema_for!(Hmac::<sha512::Hash>);
+        let schema = serde_json::from_str(&serde_json::to_string(&s).unwrap()).unwrap();
+        assert!(jsonschema_valid::Config::from_schema(&schema, None)
+            .unwrap()
+            .validate(&js)
+            .is_ok());
+    }
+
+    #[test]
+    fn ripemd160() {
+        static HASH_BYTES: [u8; 20] = [
+            0x13, 0x20, 0x72, 0xdf, 0x69, 0x09, 0x33, 0x83, 0x5e, 0xb8, 0xb6, 0xad, 0x0b, 0x77,
+            0xe7, 0xb6, 0xf1, 0x4a, 0xca, 0xd7,
+        ];
+
+        let hash = ripemd160::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        let js = serde_json::from_str(&serde_json::to_string(&hash).unwrap()).unwrap();
+        let s = schemars::schema_for!(ripemd160::Hash);
+        let schema = serde_json::from_str(&serde_json::to_string(&s).unwrap()).unwrap();
+        assert!(jsonschema_valid::Config::from_schema(&schema, None)
+            .unwrap()
+            .validate(&js)
+            .is_ok());
+    }
+
+    #[test]
+    fn sha1() {
+        static HASH_BYTES: [u8; 20] = [
+            0x13, 0x20, 0x72, 0xdf, 0x69, 0x09, 0x33, 0x83, 0x5e, 0xb8, 0xb6, 0xad, 0x0b, 0x77,
+            0xe7, 0xb6, 0xf1, 0x4a, 0xca, 0xd7,
+        ];
+
+        let hash = sha1::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        let js = serde_json::from_str(&serde_json::to_string(&hash).unwrap()).unwrap();
+        let s = schemars::schema_for!(sha1::Hash);
+        let schema = serde_json::from_str(&serde_json::to_string(&s).unwrap()).unwrap();
+        assert!(jsonschema_valid::Config::from_schema(&schema, None)
+            .unwrap()
+            .validate(&js)
+            .is_ok());
+    }
+
+    #[test]
+    fn sha256d() {
+        static HASH_BYTES: [u8; 32] = [
+            0xef, 0x53, 0x7f, 0x25, 0xc8, 0x95, 0xbf, 0xa7, 0x82, 0x52, 0x65, 0x29, 0xa9, 0xb6,
+            0x3d, 0x97, 0xaa, 0x63, 0x15, 0x64, 0xd5, 0xd7, 0x89, 0xc2, 0xb7, 0x65, 0x44, 0x8c,
+            0x86, 0x35, 0xfb, 0x6c,
+        ];
+
+        let hash = sha256d::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        let js = serde_json::from_str(&serde_json::to_string(&hash).unwrap()).unwrap();
+        let s = schemars::schema_for!(sha256d::Hash);
+        let schema = serde_json::from_str(&serde_json::to_string(&s).unwrap()).unwrap();
+        assert!(jsonschema_valid::Config::from_schema(&schema, None)
+            .unwrap()
+            .validate(&js)
+            .is_ok());
+    }
+
+    #[test]
+    fn sha256() {
+        static HASH_BYTES: [u8; 32] = [
+            0xef, 0x53, 0x7f, 0x25, 0xc8, 0x95, 0xbf, 0xa7, 0x82, 0x52, 0x65, 0x29, 0xa9, 0xb6,
+            0x3d, 0x97, 0xaa, 0x63, 0x15, 0x64, 0xd5, 0xd7, 0x89, 0xc2, 0xb7, 0x65, 0x44, 0x8c,
+            0x86, 0x35, 0xfb, 0x6c,
+        ];
+
+        let hash = sha256::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        let js = serde_json::from_str(&serde_json::to_string(&hash).unwrap()).unwrap();
+        let s = schemars::schema_for!(sha256::Hash);
+        let schema = serde_json::from_str(&serde_json::to_string(&s).unwrap()).unwrap();
+        assert!(jsonschema_valid::Config::from_schema(&schema, None)
+            .unwrap()
+            .validate(&js)
+            .is_ok());
+    }
+
+    #[test]
+    fn test_hash() {
+        const TEST_MIDSTATE: [u8; 32] = [
+            156, 224, 228, 230, 124, 17, 108, 57, 56, 179, 202, 242, 195, 15, 80, 137, 211, 243,
+            147, 108, 71, 99, 110, 96, 125, 179, 62, 234, 221, 198, 240, 201,
+        ];
+
+        #[derive(
+            Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Default, Hash, schemars::JsonSchema,
+        )]
+        pub struct TestHashTag;
+
+        impl sha256t::Tag for TestHashTag {
+            fn engine() -> sha256::HashEngine {
+                // The TapRoot TapLeaf midstate.
+                let midstate = sha256::Midstate::from_byte_array(TEST_MIDSTATE);
+                sha256::HashEngine::from_midstate(midstate, 64)
+            }
+        }
+
+        /// A hash tagged with `$name`.
+        pub type TestHash = sha256t::Hash<TestHashTag>;
+
+        sha256t_hash_newtype! {
+            struct NewTypeTag = raw(TEST_MIDSTATE, 64);
+
+            #[hash_newtype(backward)]
+            struct NewTypeHash(_);
+        }
+        static HASH_BYTES: [u8; 32] = [
+            0xef, 0x53, 0x7f, 0x25, 0xc8, 0x95, 0xbf, 0xa7, 0x82, 0x52, 0x65, 0x29, 0xa9, 0xb6,
+            0x3d, 0x97, 0xaa, 0x63, 0x15, 0x64, 0xd5, 0xd7, 0x89, 0xc2, 0xb7, 0x65, 0x44, 0x8c,
+            0x86, 0x35, 0xfb, 0x6c,
+        ];
+
+        let hash = TestHash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        let js = serde_json::from_str(&serde_json::to_string(&hash).unwrap()).unwrap();
+        let s = schemars::schema_for!(TestHash);
+        let schema = serde_json::from_str(&serde_json::to_string(&s).unwrap()).unwrap();
+        assert!(jsonschema_valid::Config::from_schema(&schema, None)
+            .unwrap()
+            .validate(&js)
+            .is_ok());
+    }
+
+    #[test]
+    fn sha512() {
+        static HASH_BYTES: [u8; 64] = [
+            0x8b, 0x41, 0xe1, 0xb7, 0x8a, 0xd1, 0x15, 0x21, 0x11, 0x3c, 0x52, 0xff, 0x18, 0x2a,
+            0x1b, 0x8e, 0x0a, 0x19, 0x57, 0x54, 0xaa, 0x52, 0x7f, 0xcd, 0x00, 0xa4, 0x11, 0x62,
+            0x0b, 0x46, 0xf2, 0x0f, 0xff, 0xfb, 0x80, 0x88, 0xcc, 0xf8, 0x54, 0x97, 0x12, 0x1a,
+            0xd4, 0x49, 0x9e, 0x08, 0x45, 0xb8, 0x76, 0xf6, 0xdd, 0x66, 0x40, 0x08, 0x8a, 0x2f,
+            0x0b, 0x2d, 0x8a, 0x60, 0x0b, 0xdf, 0x4c, 0x0c,
+        ];
+
+        let hash = sha512::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        let js = serde_json::from_str(&serde_json::to_string(&hash).unwrap()).unwrap();
+        let s = schemars::schema_for!(sha512::Hash);
+        let schema = serde_json::from_str(&serde_json::to_string(&s).unwrap()).unwrap();
+        assert!(jsonschema_valid::Config::from_schema(&schema, None)
+            .unwrap()
+            .validate(&js)
+            .is_ok());
+    }
+
+    #[test]
+    fn siphash24() {
+        static HASH_BYTES: [u8; 8] = [0x8b, 0x41, 0xe1, 0xb7, 0x8a, 0xd1, 0x15, 0x21];
+
+        let hash = siphash24::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        let js = serde_json::from_str(&serde_json::to_string(&hash).unwrap()).unwrap();
+        let s = schemars::schema_for!(siphash24::Hash);
+        let schema = serde_json::from_str(&serde_json::to_string(&s).unwrap()).unwrap();
+        assert!(jsonschema_valid::Config::from_schema(&schema, None)
+            .unwrap()
+            .validate(&js)
+            .is_ok());
+    }
+}
diff --git a/hashes/fuzz/Cargo.toml b/hashes/fuzz/Cargo.toml
new file mode 100644
index 000000000..7f327f6a6
--- /dev/null
+++ b/hashes/fuzz/Cargo.toml
@@ -0,0 +1,53 @@
+[package]
+name = "dashcore_hashes-fuzz"
+version = "0.0.1"
+authors = ["copied from rust-bitcoin"]
+publish = false
+
+[package.metadata]
+cargo-fuzz = true
+
+[features]
+honggfuzz_fuzz = ["honggfuzz"]
+
+[dependencies]
+honggfuzz = { version = "0.5", optional = true }
+dashcore_hashes = { path = "..", features = ["serde"] }
+rust-crypto = "0.2"
+
+serde = "1.0"
+serde_derive = "1.0"
+serde_json = "1.0"
+serde_cbor = "0.9"
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[[bin]]
+name = "sha1"
+path = "fuzz_targets/sha1.rs"
+
+[[bin]]
+name = "ripemd160"
+path = "fuzz_targets/ripemd160.rs"
+
+[[bin]]
+name = "sha256"
+path = "fuzz_targets/sha256.rs"
+
+[[bin]]
+name = "sha512"
+path = "fuzz_targets/sha512.rs"
+
+[[bin]]
+name = "sha512_256"
+path = "fuzz_targets/sha512_256.rs"
+
+[[bin]]
+name = "cbor"
+path = "fuzz_targets/cbor.rs"
+
+[[bin]]
+name = "json"
+path = "fuzz_targets/json.rs"
diff --git a/hashes/fuzz/fuzz_targets/cbor.rs b/hashes/fuzz/fuzz_targets/cbor.rs
new file mode 100644
index 000000000..d2c356e35
--- /dev/null
+++ b/hashes/fuzz/fuzz_targets/cbor.rs
@@ -0,0 +1,66 @@
+
+extern crate serde;
+#[macro_use] extern crate serde_derive;
+extern crate dashcore_hashes;
+extern crate serde_cbor;
+
+use dashcore_hashes::Hmac;
+use dashcore_hashes::{sha1, sha512, ripemd160, sha256d};
+
+#[derive(Deserialize, Serialize)]
+struct Hmacs {
+    sha1: Hmac<sha1::Hash>,
+    sha512: Hmac<sha512::Hash>,
+}
+
+#[derive(Deserialize, Serialize)]
+struct Main {
+    hmacs: Hmacs,
+    ripemd: ripemd160::Hash,
+    sha2d: sha256d::Hash,
+}
+
+fn do_test(data: &[u8]) {
+    if let Ok(m) = serde_cbor::from_slice::<Main>(data) {
+        let vec = serde_cbor::to_vec(&m).unwrap();
+        assert_eq!(data, &vec[..]);
+    }
+}
+
+#[cfg(feature = "honggfuzz")]
+#[macro_use]
+extern crate honggfuzz;
+
+#[cfg(feature = "honggfuzz")]
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'...b'F' => b |= c - b'A' + 10,
+                b'a'...b'f' => b |= c - b'a' + 10,
+                b'0'...b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/hashes/fuzz/fuzz_targets/json.rs b/hashes/fuzz/fuzz_targets/json.rs
new file mode 100644
index 000000000..3c5c29aea
--- /dev/null
+++ b/hashes/fuzz/fuzz_targets/json.rs
@@ -0,0 +1,66 @@
+
+extern crate serde;
+#[macro_use] extern crate serde_derive;
+extern crate dashcore_hashes;
+extern crate serde_json;
+
+use dashcore_hashes::Hmac;
+use dashcore_hashes::{sha1, sha512, ripemd160, sha256d};
+
+#[derive(Deserialize, Serialize)]
+struct Hmacs {
+    sha1: Hmac<sha1::Hash>,
+    sha512: Hmac<sha512::Hash>,
+}
+
+#[derive(Deserialize, Serialize)]
+struct Main {
+    hmacs: Hmacs,
+    ripemd: ripemd160::Hash,
+    sha2d: sha256d::Hash,
+}
+
+fn do_test(data: &[u8]) {
+    if let Ok(m) = serde_json::from_slice::<Main>(data) {
+        let vec = serde_json::to_vec(&m).unwrap();
+        assert_eq!(data, &vec[..]);
+    }
+}
+
+#[cfg(feature = "honggfuzz")]
+#[macro_use]
+extern crate honggfuzz;
+
+#[cfg(feature = "honggfuzz")]
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'...b'F' => b |= c - b'A' + 10,
+                b'a'...b'f' => b |= c - b'a' + 10,
+                b'0'...b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/hashes/fuzz/fuzz_targets/ripemd160.rs b/hashes/fuzz/fuzz_targets/ripemd160.rs
new file mode 100644
index 000000000..deb7a7df7
--- /dev/null
+++ b/hashes/fuzz/fuzz_targets/ripemd160.rs
@@ -0,0 +1,57 @@
+
+extern crate dashcore_hashes;
+extern crate crypto;
+
+use dashcore_hashes::Hash;
+use dashcore_hashes::ripemd160;
+use crypto::digest::Digest;
+use crypto::ripemd160::Ripemd160;
+
+fn do_test(data: &[u8]) {
+    let our_hash = ripemd160::Hash::hash(data);
+
+    let mut rc_hash = [0u8; 20];
+    let mut rc_engine = Ripemd160::new();
+    rc_engine.input(data);
+    rc_engine.result(&mut rc_hash);
+
+    assert_eq!(&our_hash[..], &rc_hash[..]);
+}
+
+#[cfg(feature = "honggfuzz")]
+#[macro_use]
+extern crate honggfuzz;
+
+#[cfg(feature = "honggfuzz")]
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'...b'F' => b |= c - b'A' + 10,
+                b'a'...b'f' => b |= c - b'a' + 10,
+                b'0'...b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/hashes/fuzz/fuzz_targets/sha1.rs b/hashes/fuzz/fuzz_targets/sha1.rs
new file mode 100644
index 000000000..92fbf8ffb
--- /dev/null
+++ b/hashes/fuzz/fuzz_targets/sha1.rs
@@ -0,0 +1,57 @@
+
+extern crate dashcore_hashes;
+extern crate crypto;
+
+use dashcore_hashes::Hash;
+use dashcore_hashes::sha1;
+use crypto::digest::Digest;
+use crypto::sha1::Sha1;
+
+fn do_test(data: &[u8]) {
+    let our_hash = sha1::Hash::hash(data);
+
+    let mut rc_hash = [0u8; 20];
+    let mut rc_sha1 = Sha1::new();
+    rc_sha1.input(data);
+    rc_sha1.result(&mut rc_hash);
+
+    assert_eq!(&our_hash[..], &rc_hash[..]);
+}
+
+#[cfg(feature = "honggfuzz")]
+#[macro_use]
+extern crate honggfuzz;
+
+#[cfg(feature = "honggfuzz")]
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'...b'F' => b |= c - b'A' + 10,
+                b'a'...b'f' => b |= c - b'a' + 10,
+                b'0'...b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/hashes/fuzz/fuzz_targets/sha256.rs b/hashes/fuzz/fuzz_targets/sha256.rs
new file mode 100644
index 000000000..ec86e6762
--- /dev/null
+++ b/hashes/fuzz/fuzz_targets/sha256.rs
@@ -0,0 +1,57 @@
+
+extern crate dashcore_hashes;
+extern crate crypto;
+
+use dashcore_hashes::Hash;
+use dashcore_hashes::sha256;
+use crypto::digest::Digest;
+use crypto::sha2::Sha256;
+
+fn do_test(data: &[u8]) {
+    let our_hash = sha256::Hash::hash(data);
+
+    let mut rc_hash = [0u8; 32];
+    let mut rc_engine = Sha256::new();
+    rc_engine.input(data);
+    rc_engine.result(&mut rc_hash);
+
+    assert_eq!(&our_hash[..], &rc_hash[..]);
+}
+
+#[cfg(feature = "honggfuzz")]
+#[macro_use]
+extern crate honggfuzz;
+
+#[cfg(feature = "honggfuzz")]
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'...b'F' => b |= c - b'A' + 10,
+                b'a'...b'f' => b |= c - b'a' + 10,
+                b'0'...b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/hashes/fuzz/fuzz_targets/sha512.rs b/hashes/fuzz/fuzz_targets/sha512.rs
new file mode 100644
index 000000000..ff1c7a932
--- /dev/null
+++ b/hashes/fuzz/fuzz_targets/sha512.rs
@@ -0,0 +1,57 @@
+
+extern crate dashcore_hashes;
+extern crate crypto;
+
+use dashcore_hashes::Hash;
+use dashcore_hashes::sha512;
+use crypto::digest::Digest;
+use crypto::sha2::Sha512;
+
+fn do_test(data: &[u8]) {
+    let our_hash = sha512::Hash::hash(data);
+
+    let mut rc_hash = [0u8; 64];
+    let mut rc_engine = Sha512::new();
+    rc_engine.input(data);
+    rc_engine.result(&mut rc_hash);
+
+    assert_eq!(&our_hash[..], &rc_hash[..]);
+}
+
+#[cfg(feature = "honggfuzz")]
+#[macro_use]
+extern crate honggfuzz;
+
+#[cfg(feature = "honggfuzz")]
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'...b'F' => b |= c - b'A' + 10,
+                b'a'...b'f' => b |= c - b'a' + 10,
+                b'0'...b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/hashes/fuzz/fuzz_targets/sha512_256.rs b/hashes/fuzz/fuzz_targets/sha512_256.rs
new file mode 100644
index 000000000..d277217f5
--- /dev/null
+++ b/hashes/fuzz/fuzz_targets/sha512_256.rs
@@ -0,0 +1,57 @@
+
+extern crate dashcore_hashes;
+extern crate crypto;
+
+use dashcore_hashes::Hash;
+use dashcore_hashes::sha512_256;
+use crypto::digest::Digest;
+use crypto::sha2::Sha512Trunc256;
+
+fn do_test(data: &[u8]) {
+    let our_hash = sha512_256::Hash::hash(data);
+
+    let mut rc_hash = [0u8; 32];
+    let mut rc_engine = Sha512Trunc256::new();
+    rc_engine.input(data);
+    rc_engine.result(&mut rc_hash);
+
+    assert_eq!(&our_hash[..], &rc_hash[..]);
+}
+
+#[cfg(feature = "honggfuzz")]
+#[macro_use]
+extern crate honggfuzz;
+
+#[cfg(feature = "honggfuzz")]
+fn main() {
+    loop {
+        fuzz!(|d| { do_test(d) });
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
+        let mut b = 0;
+        for (idx, c) in hex.as_bytes().iter().enumerate() {
+            b <<= 4;
+            match *c {
+                b'A'...b'F' => b |= c - b'A' + 10,
+                b'a'...b'f' => b |= c - b'a' + 10,
+                b'0'...b'9' => b |= c - b'0',
+                _ => panic!("Bad hex"),
+            }
+            if (idx & 1) == 1 {
+                out.push(b);
+                b = 0;
+            }
+        }
+    }
+
+    #[test]
+    fn duplicate_crash() {
+        let mut a = Vec::new();
+        extend_vec_from_hex("00000", &mut a);
+        super::do_test(&a);
+    }
+}
diff --git a/hashes/fuzz/travis-fuzz.sh b/hashes/fuzz/travis-fuzz.sh
new file mode 100755
index 000000000..aebd1aa46
--- /dev/null
+++ b/hashes/fuzz/travis-fuzz.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+set -e
+cargo install --force honggfuzz
+for TARGET in fuzz_targets/*; do
+    FILENAME=$(basename $TARGET)
+	FILE="${FILENAME%.*}"
+	if [ -d hfuzz_input/$FILE ]; then
+	    HFUZZ_INPUT_ARGS="-f hfuzz_input/$FILE/input"
+	fi
+
+        rm -f hfuzz_workspace/$FILE/HONGGFUZZ.REPORT.TXT
+
+	HFUZZ_BUILD_ARGS="--features honggfuzz_fuzz" HFUZZ_RUN_ARGS="-N1000000 --exit_upon_crash -v $HFUZZ_INPUT_ARGS" cargo hfuzz run $FILE
+
+	if [ -f hfuzz_workspace/$FILE/HONGGFUZZ.REPORT.TXT ]; then
+		cat hfuzz_workspace/$FILE/HONGGFUZZ.REPORT.TXT
+		for CASE in hfuzz_workspace/$FILE/SIG*; do
+			cat $CASE | xxd -p
+		done
+		exit 1
+	fi
+done
diff --git a/hashes/src/cmp.rs b/hashes/src/cmp.rs
new file mode 100644
index 000000000..05b430d96
--- /dev/null
+++ b/hashes/src/cmp.rs
@@ -0,0 +1,152 @@
+//! Useful comparison functions.
+
+/// Compare two slices for equality in fixed time. Panics if the slices are of non-equal length.
+///
+/// This works by XOR'ing each byte of the two inputs together and keeping an OR counter of the
+/// results.
+///
+/// Instead of doing fancy bit twiddling to try to outsmart the compiler and prevent early exits,
+/// which is not guaranteed to remain stable as compilers get ever smarter, we take the hit of
+/// writing each intermediate value to memory with a volatile write and then re-reading it with a
+/// volatile read. This should remain stable across compiler upgrades, but is much slower.
+///
+/// As of rust 1.31.0 disassembly looks completely within reason for this, see
+/// <https://godbolt.org/z/mMbGQv>.
+pub fn fixed_time_eq(a: &[u8], b: &[u8]) -> bool {
+    assert!(a.len() == b.len());
+    let count = a.len();
+    let lhs = &a[..count];
+    let rhs = &b[..count];
+
+    let mut r: u8 = 0;
+    for i in 0..count {
+        let mut rs = unsafe { core::ptr::read_volatile(&r) };
+        rs |= lhs[i] ^ rhs[i];
+        unsafe {
+            core::ptr::write_volatile(&mut r, rs);
+        }
+    }
+    {
+        let mut t = unsafe { core::ptr::read_volatile(&r) };
+        t |= t >> 4;
+        unsafe {
+            core::ptr::write_volatile(&mut r, t);
+        }
+    }
+    {
+        let mut t = unsafe { core::ptr::read_volatile(&r) };
+        t |= t >> 2;
+        unsafe {
+            core::ptr::write_volatile(&mut r, t);
+        }
+    }
+    {
+        let mut t = unsafe { core::ptr::read_volatile(&r) };
+        t |= t >> 1;
+        unsafe {
+            core::ptr::write_volatile(&mut r, t);
+        }
+    }
+    unsafe { (::core::ptr::read_volatile(&r) & 1) == 0 }
+}
+
+#[test]
+fn eq_test() {
+    assert!(fixed_time_eq(&[0b00000000], &[0b00000000]));
+    assert!(fixed_time_eq(&[0b00000001], &[0b00000001]));
+    assert!(fixed_time_eq(&[0b00000010], &[0b00000010]));
+    assert!(fixed_time_eq(&[0b00000100], &[0b00000100]));
+    assert!(fixed_time_eq(&[0b00001000], &[0b00001000]));
+    assert!(fixed_time_eq(&[0b00010000], &[0b00010000]));
+    assert!(fixed_time_eq(&[0b00100000], &[0b00100000]));
+    assert!(fixed_time_eq(&[0b01000000], &[0b01000000]));
+    assert!(fixed_time_eq(&[0b10000000], &[0b10000000]));
+    assert!(fixed_time_eq(&[0b11111111], &[0b11111111]));
+
+    assert!(!fixed_time_eq(&[0b00000001], &[0b00000000]));
+    assert!(!fixed_time_eq(&[0b00000001], &[0b11111111]));
+    assert!(!fixed_time_eq(&[0b00000010], &[0b00000000]));
+    assert!(!fixed_time_eq(&[0b00000010], &[0b11111111]));
+    assert!(!fixed_time_eq(&[0b00000100], &[0b00000000]));
+    assert!(!fixed_time_eq(&[0b00000100], &[0b11111111]));
+    assert!(!fixed_time_eq(&[0b00001000], &[0b00000000]));
+    assert!(!fixed_time_eq(&[0b00001000], &[0b11111111]));
+    assert!(!fixed_time_eq(&[0b00010000], &[0b00000000]));
+    assert!(!fixed_time_eq(&[0b00010000], &[0b11111111]));
+    assert!(!fixed_time_eq(&[0b00100000], &[0b00000000]));
+    assert!(!fixed_time_eq(&[0b00100000], &[0b11111111]));
+    assert!(!fixed_time_eq(&[0b01000000], &[0b00000000]));
+    assert!(!fixed_time_eq(&[0b01000000], &[0b11111111]));
+    assert!(!fixed_time_eq(&[0b10000000], &[0b00000000]));
+    assert!(!fixed_time_eq(&[0b10000000], &[0b11111111]));
+
+    assert!(fixed_time_eq(&[0b00000000, 0b00000000], &[0b00000000, 0b00000000]));
+    assert!(!fixed_time_eq(&[0b00000001, 0b00000000], &[0b00000000, 0b00000000]));
+    assert!(!fixed_time_eq(&[0b00000000, 0b00000001], &[0b00000000, 0b00000000]));
+    assert!(!fixed_time_eq(&[0b00000000, 0b00000000], &[0b00000001, 0b00000000]));
+    assert!(!fixed_time_eq(&[0b00000000, 0b00000000], &[0b00000001, 0b00000001]));
+}
+
+#[cfg(bench)]
+mod benches {
+    use test::Bencher;
+
+    use crate::cmp::fixed_time_eq;
+    use crate::{sha256, sha512, Hash};
+
+    #[bench]
+    fn bench_32b_constant_time_cmp_ne(bh: &mut Bencher) {
+        let hash_a = sha256::Hash::hash(&[0; 1]);
+        let hash_b = sha256::Hash::hash(&[1; 1]);
+        bh.iter(|| fixed_time_eq(&hash_a[..], &hash_b[..]))
+    }
+
+    #[bench]
+    fn bench_32b_slice_cmp_ne(bh: &mut Bencher) {
+        let hash_a = sha256::Hash::hash(&[0; 1]);
+        let hash_b = sha256::Hash::hash(&[1; 1]);
+        bh.iter(|| &hash_a[..] == &hash_b[..])
+    }
+
+    #[bench]
+    fn bench_32b_constant_time_cmp_eq(bh: &mut Bencher) {
+        let hash_a = sha256::Hash::hash(&[0; 1]);
+        let hash_b = sha256::Hash::hash(&[0; 1]);
+        bh.iter(|| fixed_time_eq(&hash_a[..], &hash_b[..]))
+    }
+
+    #[bench]
+    fn bench_32b_slice_cmp_eq(bh: &mut Bencher) {
+        let hash_a = sha256::Hash::hash(&[0; 1]);
+        let hash_b = sha256::Hash::hash(&[0; 1]);
+        bh.iter(|| &hash_a[..] == &hash_b[..])
+    }
+
+    #[bench]
+    fn bench_64b_constant_time_cmp_ne(bh: &mut Bencher) {
+        let hash_a = sha512::Hash::hash(&[0; 1]);
+        let hash_b = sha512::Hash::hash(&[1; 1]);
+        bh.iter(|| fixed_time_eq(&hash_a[..], &hash_b[..]))
+    }
+
+    #[bench]
+    fn bench_64b_slice_cmp_ne(bh: &mut Bencher) {
+        let hash_a = sha512::Hash::hash(&[0; 1]);
+        let hash_b = sha512::Hash::hash(&[1; 1]);
+        bh.iter(|| &hash_a[..] == &hash_b[..])
+    }
+
+    #[bench]
+    fn bench_64b_constant_time_cmp_eq(bh: &mut Bencher) {
+        let hash_a = sha512::Hash::hash(&[0; 1]);
+        let hash_b = sha512::Hash::hash(&[0; 1]);
+        bh.iter(|| fixed_time_eq(&hash_a[..], &hash_b[..]))
+    }
+
+    #[bench]
+    fn bench_64b_slice_cmp_eq(bh: &mut Bencher) {
+        let hash_a = sha512::Hash::hash(&[0; 1]);
+        let hash_b = sha512::Hash::hash(&[0; 1]);
+        bh.iter(|| &hash_a[..] == &hash_b[..])
+    }
+}
diff --git a/hashes/src/error.rs b/hashes/src/error.rs
new file mode 100644
index 000000000..016a77975
--- /dev/null
+++ b/hashes/src/error.rs
@@ -0,0 +1,47 @@
+// Bitcoin Hashes Library
+// Written in 2018 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Crate error type.
+//!
+
+use core::fmt;
+
+/// Crate error type.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum Error {
+    /// Tried to create a fixed-length hash from a slice with the wrong size (expected, got).
+    InvalidLength(usize, usize),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use self::Error::*;
+
+        match self {
+            InvalidLength(ref ell, ref ell2) =>
+                write!(f, "invalid slice length {} (expected {})", ell2, ell),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match self {
+            InvalidLength(_, _) => None,
+        }
+    }
+}
diff --git a/hashes/src/hash160.rs b/hashes/src/hash160.rs
new file mode 100644
index 000000000..47559c6b7
--- /dev/null
+++ b/hashes/src/hash160.rs
@@ -0,0 +1,162 @@
+// Bitcoin Hashes Library
+// Written in 2018 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+// This module is largely copied from the rust-crypto ripemd.rs file;
+// while rust-crypto is licensed under Apache, that file specifically
+// was written entirely by Andrew Poelstra, who is re-licensing its
+// contents here as CC0.
+
+//! HASH160 (SHA256 then RIPEMD160) implementation.
+//!
+
+use core::ops::Index;
+use core::slice::SliceIndex;
+use core::str;
+
+use crate::{ripemd160, sha256, Error};
+
+crate::internal_macros::hash_type! {
+    160,
+    false,
+    "Output of the Bitcoin HASH160 hash function. (RIPEMD160(SHA256))",
+    "crate::util::json_hex_string::len_20"
+}
+
+type HashEngine = sha256::HashEngine;
+
+fn from_engine(e: HashEngine) -> Hash {
+    use crate::Hash as _;
+
+    let sha2 = sha256::Hash::from_engine(e);
+    let rmd = ripemd160::Hash::hash(&sha2[..]);
+
+    let mut ret = [0; 20];
+    ret.copy_from_slice(&rmd[..]);
+    Hash(ret)
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    #[cfg(feature = "alloc")]
+    fn test() {
+        use crate::{hash160, Hash, HashEngine};
+
+        #[derive(Clone)]
+        #[cfg(feature = "alloc")]
+        struct Test {
+            input: Vec<u8>,
+            output: Vec<u8>,
+            output_str: &'static str,
+        }
+
+        #[rustfmt::skip]
+        let tests = vec![
+            // Uncompressed pubkey obtained from Bitcoin key; data from validateaddress
+            Test {
+                input: vec![
+                    0x04, 0xa1, 0x49, 0xd7, 0x6c, 0x5d, 0xe2, 0x7a, 0x2d,
+                    0xdb, 0xfa, 0xa1, 0x24, 0x6c, 0x4a, 0xdc, 0xd2, 0xb6,
+                    0xf7, 0xaa, 0x29, 0x54, 0xc2, 0xe2, 0x53, 0x03, 0xf5,
+                    0x51, 0x54, 0xca, 0xad, 0x91, 0x52, 0xe4, 0xf7, 0xe4,
+                    0xb8, 0x5d, 0xf1, 0x69, 0xc1, 0x8a, 0x3c, 0x69, 0x7f,
+                    0xbb, 0x2d, 0xc4, 0xec, 0xef, 0x94, 0xac, 0x55, 0xfe,
+                    0x81, 0x64, 0xcc, 0xf9, 0x82, 0xa1, 0x38, 0x69, 0x1a,
+                    0x55, 0x19,
+                ],
+                output: vec![
+                    0xda, 0x0b, 0x34, 0x52, 0xb0, 0x6f, 0xe3, 0x41,
+                    0x62, 0x6a, 0xd0, 0x94, 0x9c, 0x18, 0x3f, 0xbd,
+                    0xa5, 0x67, 0x68, 0x26,
+                ],
+                output_str: "da0b3452b06fe341626ad0949c183fbda5676826",
+            },
+        ];
+
+        for test in tests {
+            // Hash through high-level API, check hex encoding/decoding
+            let hash = hash160::Hash::hash(&test.input[..]);
+            assert_eq!(hash, test.output_str.parse::<hash160::Hash>().expect("parse hex"));
+            assert_eq!(&hash[..], &test.output[..]);
+            assert_eq!(&hash.to_string(), &test.output_str);
+
+            // Hash through engine, checking that we can input byte by byte
+            let mut engine = hash160::Hash::engine();
+            for ch in test.input {
+                engine.input(&[ch]);
+            }
+            let manual_hash = Hash::from_engine(engine);
+            assert_eq!(hash, manual_hash);
+            assert_eq!(hash.to_byte_array()[..].as_ref(), test.output.as_slice());
+        }
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn ripemd_serde() {
+        use serde_test::{assert_tokens, Configure, Token};
+
+        use crate::{hash160, Hash};
+
+        #[rustfmt::skip]
+        static HASH_BYTES: [u8; 20] = [
+            0x13, 0x20, 0x72, 0xdf,
+            0x69, 0x09, 0x33, 0x83,
+            0x5e, 0xb8, 0xb6, 0xad,
+            0x0b, 0x77, 0xe7, 0xb6,
+            0xf1, 0x4a, 0xca, 0xd7,
+        ];
+
+        let hash = hash160::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        assert_tokens(&hash.compact(), &[Token::BorrowedBytes(&HASH_BYTES[..])]);
+        assert_tokens(&hash.readable(), &[Token::Str("132072df690933835eb8b6ad0b77e7b6f14acad7")]);
+    }
+}
+
+#[cfg(bench)]
+mod benches {
+    use test::Bencher;
+
+    use crate::{hash160, Hash, HashEngine};
+
+    #[bench]
+    pub fn hash160_10(bh: &mut Bencher) {
+        let mut engine = hash160::Hash::engine();
+        let bytes = [1u8; 10];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn hash160_1k(bh: &mut Bencher) {
+        let mut engine = hash160::Hash::engine();
+        let bytes = [1u8; 1024];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn hash160_64k(bh: &mut Bencher) {
+        let mut engine = hash160::Hash::engine();
+        let bytes = [1u8; 65536];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+}
diff --git a/hashes/src/hash_x11.rs b/hashes/src/hash_x11.rs
new file mode 100644
index 000000000..65f4b3b50
--- /dev/null
+++ b/hashes/src/hash_x11.rs
@@ -0,0 +1,153 @@
+// Rust Dash Library
+// Originally written in 2014 by
+//     Dmitrii Golubev <dmitrii.golubev@dash.org>
+//     For Dash
+// Updated for Dash in 2022 by
+//     The Dash Core Developers
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! An implementation of a hash engine to support the X1 hash,
+//! which is a wrapper around the rs-x11-hash library.
+
+use core::ops::Index;
+use core::slice::SliceIndex;
+use core::{str};
+
+#[cfg(feature = "std")]
+use std::io;
+
+#[cfg(feature = "std")]
+use std::vec::Vec;
+
+#[cfg(all(feature = "core2", not(feature = "std")))]
+use core2::io;
+
+#[cfg(all(feature = "alloc", not(feature = "std")))]
+use crate::alloc::vec::Vec;
+
+use crate::{hex, Error, HashEngine as _};
+
+crate::internal_macros::hash_type! {
+    256,
+    true,
+    "Output of the X11 hash function.",
+    "crate::util::json_hex_string::len_32"
+}
+
+/// Output of the X11 hash function
+fn from_engine(e: HashEngine) -> Hash {
+    return Hash(e.midstate().to_byte_array());
+}
+
+/// A hashing engine of X11 algorithm, which bytes can be serialized into
+#[derive(Clone)]
+pub struct HashEngine {
+    buf: Vec<u8>,
+    length: usize,
+}
+
+impl Default for HashEngine {
+    fn default() -> Self {
+        HashEngine {
+            buf: Vec::new(),
+            length: 0,
+        }
+    }
+}
+
+impl crate::HashEngine for HashEngine {
+    type MidState = Midstate;
+
+    const BLOCK_SIZE: usize = 32;
+
+    fn midstate(&self) -> Self::MidState {
+        Midstate(rs_x11_hash::get_x11_hash(self.buf.as_slice()))
+    }
+
+    fn input(&mut self, data: &[u8]) {
+        self.buf.extend_from_slice(data);
+    }
+
+    fn n_bytes_hashed(&self) -> usize {
+        self.length.clone()
+    }
+}
+
+/// Output of the X11 hash function
+#[derive(Copy, Clone, PartialEq, Eq, Default, PartialOrd, Ord, Hash)]
+pub struct Midstate(pub [u8; 32]);
+
+crate::internal_macros::arr_newtype_fmt_impl!(Midstate, 32);
+serde_impl!(Midstate, 32);
+borrow_slice_impl!(Midstate);
+
+impl<I: SliceIndex<[u8]>> Index<I> for Midstate {
+    type Output = I::Output;
+
+    #[inline]
+    fn index(&self, index: I) -> &Self::Output { &self.0[index] }
+}
+
+impl str::FromStr for Midstate {
+    type Err = hex::Error;
+    fn from_str(s: &str) -> Result<Self, Self::Err> { hex::FromHex::from_hex(s) }
+}
+
+impl Midstate {
+    /// Length of the midstate, in bytes.
+    const LEN: usize = 32;
+
+    /// Flag indicating whether user-visible serializations of this hash
+    /// should be backward. For some reason Satoshi decided this should be
+    /// true for `Sha256dHash`, so here we are.
+    const DISPLAY_BACKWARD: bool = true;
+
+    /// Construct a new [`Midstate`] from the inner value.
+    pub const fn from_byte_array(inner: [u8; 32]) -> Self { Midstate(inner) }
+
+    /// Copies a byte slice into the [`Midstate`] object.
+    pub fn from_slice(sl: &[u8]) -> Result<Midstate, Error> {
+        if sl.len() != Self::LEN {
+            Err(Error::InvalidLength(Self::LEN, sl.len()))
+        } else {
+            let mut ret = [0; 32];
+            ret.copy_from_slice(sl);
+            Ok(Midstate(ret))
+        }
+    }
+
+    /// Unwraps the [`Midstate`] and returns the underlying byte array.
+    pub fn to_byte_array(self) -> [u8; 32] { self.0 }
+
+    /// Unwraps the [Midstate] and returns the underlying byte array.
+    pub fn into_inner(self) -> [u8; 32] {
+        self.0
+    }
+}
+
+impl hex::FromHex for Midstate {
+    fn from_byte_iter<I>(iter: I) -> Result<Self, hex::Error>
+        where
+            I: Iterator<Item=Result<u8, hex::Error>> + ExactSizeIterator + DoubleEndedIterator,
+    {
+        // DISPLAY_BACKWARD is true
+        Ok(Midstate::from_byte_array(hex::FromHex::from_byte_iter(iter.rev())?))
+    }
+}
+
+impl io::Write for HashEngine {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        self.input(buf);
+        Ok(buf.len())
+    }
+    fn flush(&mut self) -> io::Result<()> { Ok(()) }
+}
diff --git a/hashes/src/hex.rs b/hashes/src/hex.rs
new file mode 100644
index 000000000..d2100063f
--- /dev/null
+++ b/hashes/src/hex.rs
@@ -0,0 +1,239 @@
+// Bitcoin Hashes Library
+// Written in 2018 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Hex encoding and decoding.
+//!
+
+use core::{fmt, str};
+#[cfg(feature = "std")]
+use std::io;
+
+#[cfg(all(feature = "core2", not(feature = "std")))]
+use core2::io;
+
+#[cfg(all(feature = "alloc", not(feature = "std")))]
+use crate::alloc::vec::Vec;
+
+/// Hex decoding error.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum Error {
+    /// Non-hexadecimal character.
+    InvalidChar(u8),
+    /// Purported hex string had odd length.
+    OddLengthString(usize),
+    /// Tried to parse fixed-length hash from a string with the wrong type (expected, got).
+    InvalidLength(usize, usize),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Error::InvalidChar(ch) => write!(f, "invalid hex character {}", ch),
+            Error::OddLengthString(ell) => write!(f, "odd hex string length {}", ell),
+            Error::InvalidLength(ell, ell2) =>
+                write!(f, "bad hex string length {} (expected {})", ell2, ell),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use self::Error::*;
+
+        match self {
+            InvalidChar(_) | OddLengthString(_) | InvalidLength(_, _) => None,
+        }
+    }
+}
+
+/// Trait for objects that can be deserialized from hex strings.
+pub trait FromHex: Sized {
+    /// Produces an object from a byte iterator.
+    fn from_byte_iter<I>(iter: I) -> Result<Self, Error>
+    where
+        I: Iterator<Item = Result<u8, Error>> + ExactSizeIterator + DoubleEndedIterator;
+
+    /// Produces an object from a hex string.
+    fn from_hex(s: &str) -> Result<Self, Error> { Self::from_byte_iter(HexIterator::new(s)?) }
+}
+
+/// Iterator over a hex-encoded string slice which decodes hex and yields bytes.
+pub struct HexIterator<'a> {
+    /// The `Bytes` iterator whose next two bytes will be decoded to yield
+    /// the next byte.
+    iter: str::Bytes<'a>,
+}
+
+impl<'a> HexIterator<'a> {
+    /// Constructs a new `HexIterator` from a string slice.
+    ///
+    /// # Errors
+    ///
+    /// If the input string is of odd length.
+    pub fn new(s: &'a str) -> Result<HexIterator<'a>, Error> {
+        if s.len() % 2 != 0 {
+            Err(Error::OddLengthString(s.len()))
+        } else {
+            Ok(HexIterator { iter: s.bytes() })
+        }
+    }
+}
+
+fn chars_to_hex(hi: u8, lo: u8) -> Result<u8, Error> {
+    let hih = (hi as char).to_digit(16).ok_or(Error::InvalidChar(hi))?;
+    let loh = (lo as char).to_digit(16).ok_or(Error::InvalidChar(lo))?;
+
+    let ret = (hih << 4) + loh;
+    Ok(ret as u8)
+}
+
+impl<'a> Iterator for HexIterator<'a> {
+    type Item = Result<u8, Error>;
+
+    fn next(&mut self) -> Option<Result<u8, Error>> {
+        let hi = self.iter.next()?;
+        let lo = self.iter.next().unwrap();
+        Some(chars_to_hex(hi, lo))
+    }
+
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        let (min, max) = self.iter.size_hint();
+        (min / 2, max.map(|x| x / 2))
+    }
+}
+
+#[cfg(any(feature = "std", feature = "core2"))]
+impl<'a> io::Read for HexIterator<'a> {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        let mut bytes_read = 0usize;
+        for dst in buf {
+            match self.next() {
+                Some(Ok(src)) => {
+                    *dst = src;
+                    bytes_read += 1;
+                }
+                _ => break,
+            }
+        }
+        Ok(bytes_read)
+    }
+}
+
+impl<'a> DoubleEndedIterator for HexIterator<'a> {
+    fn next_back(&mut self) -> Option<Result<u8, Error>> {
+        let lo = self.iter.next_back()?;
+        let hi = self.iter.next_back().unwrap();
+        Some(chars_to_hex(hi, lo))
+    }
+}
+
+impl<'a> ExactSizeIterator for HexIterator<'a> {}
+
+#[cfg(any(test, feature = "std", feature = "alloc"))]
+impl FromHex for Vec<u8> {
+    fn from_byte_iter<I>(iter: I) -> Result<Self, Error>
+    where
+        I: Iterator<Item = Result<u8, Error>> + ExactSizeIterator + DoubleEndedIterator,
+    {
+        iter.collect()
+    }
+}
+
+macro_rules! impl_fromhex_array {
+    ($len:expr) => {
+        impl FromHex for [u8; $len] {
+            fn from_byte_iter<I>(iter: I) -> Result<Self, Error>
+            where
+                I: Iterator<Item = Result<u8, Error>> + ExactSizeIterator + DoubleEndedIterator,
+            {
+                if iter.len() == $len {
+                    let mut ret = [0; $len];
+                    for (n, byte) in iter.enumerate() {
+                        ret[n] = byte?;
+                    }
+                    Ok(ret)
+                } else {
+                    Err(Error::InvalidLength(2 * $len, 2 * iter.len()))
+                }
+            }
+        }
+    };
+}
+
+impl_fromhex_array!(2);
+impl_fromhex_array!(4);
+impl_fromhex_array!(6);
+impl_fromhex_array!(8);
+impl_fromhex_array!(10);
+impl_fromhex_array!(12);
+impl_fromhex_array!(14);
+impl_fromhex_array!(16);
+impl_fromhex_array!(20);
+impl_fromhex_array!(24);
+impl_fromhex_array!(28);
+impl_fromhex_array!(32);
+impl_fromhex_array!(33);
+impl_fromhex_array!(48);
+impl_fromhex_array!(64);
+impl_fromhex_array!(65);
+impl_fromhex_array!(96);
+impl_fromhex_array!(128);
+impl_fromhex_array!(256);
+impl_fromhex_array!(384);
+impl_fromhex_array!(512);
+
+#[cfg(test)]
+#[cfg(feature = "alloc")]
+mod tests {
+    use internals::hex::exts::DisplayHex;
+
+    use super::*;
+
+    #[test]
+    fn hex_roundtrip() {
+        let expected = "0123456789abcdef";
+        let expected_up = "0123456789ABCDEF";
+
+        let parse: Vec<u8> = FromHex::from_hex(expected).expect("parse lowercase string");
+        assert_eq!(parse, vec![0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]);
+        let ser = parse.to_lower_hex_string();
+        assert_eq!(ser, expected);
+
+        let parse: Vec<u8> = FromHex::from_hex(expected_up).expect("parse uppercase string");
+        assert_eq!(parse, vec![0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]);
+        let ser = parse.to_lower_hex_string();
+        assert_eq!(ser, expected);
+
+        let parse: [u8; 8] = FromHex::from_hex(expected_up).expect("parse uppercase string");
+        assert_eq!(parse, [0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]);
+        let ser = parse.to_lower_hex_string();
+        assert_eq!(ser, expected);
+    }
+
+    #[test]
+    fn hex_error() {
+        let oddlen = "0123456789abcdef0";
+        let badchar1 = "Z123456789abcdef";
+        let badchar2 = "012Y456789abcdeb";
+        let badchar3 = "«23456789abcdef";
+
+        assert_eq!(Vec::<u8>::from_hex(oddlen), Err(Error::OddLengthString(17)));
+        assert_eq!(<[u8; 4]>::from_hex(oddlen), Err(Error::OddLengthString(17)));
+        assert_eq!(<[u8; 8]>::from_hex(oddlen), Err(Error::OddLengthString(17)));
+        assert_eq!(Vec::<u8>::from_hex(badchar1), Err(Error::InvalidChar(b'Z')));
+        assert_eq!(Vec::<u8>::from_hex(badchar2), Err(Error::InvalidChar(b'Y')));
+        assert_eq!(Vec::<u8>::from_hex(badchar3), Err(Error::InvalidChar(194)));
+    }
+}
diff --git a/hashes/src/hmac.rs b/hashes/src/hmac.rs
new file mode 100644
index 000000000..d5d2aae7e
--- /dev/null
+++ b/hashes/src/hmac.rs
@@ -0,0 +1,395 @@
+// Bitcoin Hashes Library
+// Written in 2018 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+// This module is largely copied from the rust-crypto ripemd.rs file;
+// while rust-crypto is licensed under Apache, that file specifically
+// was written entirely by Andrew Poelstra, who is re-licensing its
+// contents here as CC0.
+
+//! Hash-based Message Authentication Code (HMAC).
+//!
+
+use core::{borrow, fmt, ops, str};
+
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
+use crate::{Error, Hash, HashEngine};
+
+/// A hash computed from a RFC 2104 HMAC. Parameterized by the underlying hash function.
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
+#[cfg_attr(feature = "schemars", schemars(transparent))]
+#[repr(transparent)]
+pub struct Hmac<T: Hash>(T);
+
+impl<T: Hash + str::FromStr> str::FromStr for Hmac<T> {
+    type Err = <T as str::FromStr>::Err;
+    fn from_str(s: &str) -> Result<Self, Self::Err> { Ok(Hmac(str::FromStr::from_str(s)?)) }
+}
+
+/// Pair of underlying hash midstates which represent the current state of an `HmacEngine`.
+pub struct HmacMidState<T: Hash> {
+    /// Midstate of the inner hash engine
+    pub inner: <T::Engine as HashEngine>::MidState,
+    /// Midstate of the outer hash engine
+    pub outer: <T::Engine as HashEngine>::MidState,
+}
+
+/// Pair of underyling hash engines, used for the inner and outer hash of HMAC.
+#[derive(Clone)]
+pub struct HmacEngine<T: Hash> {
+    iengine: T::Engine,
+    oengine: T::Engine,
+}
+
+impl<T: Hash> Default for HmacEngine<T> {
+    fn default() -> Self { HmacEngine::new(&[]) }
+}
+
+impl<T: Hash> HmacEngine<T> {
+    /// Constructs a new keyed HMAC from `key`.
+    ///
+    /// We only support underlying hashes whose block sizes are ≤ 128 bytes.
+    ///
+    /// # Panics
+    ///
+    /// Larger hashes will result in a panic.
+    pub fn new(key: &[u8]) -> HmacEngine<T> {
+        debug_assert!(T::Engine::BLOCK_SIZE <= 128);
+
+        let mut ipad = [0x36u8; 128];
+        let mut opad = [0x5cu8; 128];
+        let mut ret = HmacEngine { iengine: <T as Hash>::engine(), oengine: <T as Hash>::engine() };
+
+        if key.len() > T::Engine::BLOCK_SIZE {
+            let hash = <T as Hash>::hash(key);
+            for (b_i, b_h) in ipad.iter_mut().zip(&hash[..]) {
+                *b_i ^= *b_h;
+            }
+            for (b_o, b_h) in opad.iter_mut().zip(&hash[..]) {
+                *b_o ^= *b_h;
+            }
+        } else {
+            for (b_i, b_h) in ipad.iter_mut().zip(key) {
+                *b_i ^= *b_h;
+            }
+            for (b_o, b_h) in opad.iter_mut().zip(key) {
+                *b_o ^= *b_h;
+            }
+        };
+
+        HashEngine::input(&mut ret.iengine, &ipad[..T::Engine::BLOCK_SIZE]);
+        HashEngine::input(&mut ret.oengine, &opad[..T::Engine::BLOCK_SIZE]);
+        ret
+    }
+
+    /// A special constructor giving direct access to the underlying "inner" and "outer" engines.
+    pub fn from_inner_engines(iengine: T::Engine, oengine: T::Engine) -> HmacEngine<T> {
+        HmacEngine { iengine, oengine }
+    }
+}
+
+impl<T: Hash> HashEngine for HmacEngine<T> {
+    type MidState = HmacMidState<T>;
+
+    fn midstate(&self) -> Self::MidState {
+        HmacMidState { inner: self.iengine.midstate(), outer: self.oengine.midstate() }
+    }
+
+    const BLOCK_SIZE: usize = T::Engine::BLOCK_SIZE;
+
+    fn n_bytes_hashed(&self) -> usize { self.iengine.n_bytes_hashed() }
+
+    fn input(&mut self, buf: &[u8]) { self.iengine.input(buf) }
+}
+
+impl<T: Hash> fmt::Debug for Hmac<T> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Debug::fmt(&self.0, f) }
+}
+
+impl<T: Hash> fmt::Display for Hmac<T> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(&self.0, f) }
+}
+
+impl<T: Hash> fmt::LowerHex for Hmac<T> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::LowerHex::fmt(&self.0, f) }
+}
+
+impl<T: Hash> ops::Index<usize> for Hmac<T> {
+    type Output = u8;
+    fn index(&self, index: usize) -> &u8 { &self.0[index] }
+}
+
+impl<T: Hash> ops::Index<ops::Range<usize>> for Hmac<T> {
+    type Output = [u8];
+    fn index(&self, index: ops::Range<usize>) -> &[u8] { &self.0[index] }
+}
+
+impl<T: Hash> ops::Index<ops::RangeFrom<usize>> for Hmac<T> {
+    type Output = [u8];
+    fn index(&self, index: ops::RangeFrom<usize>) -> &[u8] { &self.0[index] }
+}
+
+impl<T: Hash> ops::Index<ops::RangeTo<usize>> for Hmac<T> {
+    type Output = [u8];
+    fn index(&self, index: ops::RangeTo<usize>) -> &[u8] { &self.0[index] }
+}
+
+impl<T: Hash> ops::Index<ops::RangeFull> for Hmac<T> {
+    type Output = [u8];
+    fn index(&self, index: ops::RangeFull) -> &[u8] { &self.0[index] }
+}
+
+impl<T: Hash> borrow::Borrow<[u8]> for Hmac<T> {
+    fn borrow(&self) -> &[u8] { &self[..] }
+}
+
+impl<T: Hash> Hash for Hmac<T> {
+    type Engine = HmacEngine<T>;
+    type Bytes = T::Bytes;
+
+    fn from_engine(mut e: HmacEngine<T>) -> Hmac<T> {
+        let ihash = T::from_engine(e.iengine);
+        e.oengine.input(&ihash[..]);
+        let ohash = T::from_engine(e.oengine);
+        Hmac(ohash)
+    }
+
+    const LEN: usize = T::LEN;
+
+    fn from_slice(sl: &[u8]) -> Result<Hmac<T>, Error> { T::from_slice(sl).map(Hmac) }
+
+    fn to_byte_array(self) -> Self::Bytes { self.0.to_byte_array() }
+
+    fn as_byte_array(&self) -> &Self::Bytes { self.0.as_byte_array() }
+
+    fn from_byte_array(bytes: T::Bytes) -> Self { Hmac(T::from_byte_array(bytes)) }
+
+    fn all_zeros() -> Self {
+        let zeros = T::all_zeros();
+        Hmac(zeros)
+    }
+}
+
+#[cfg(feature = "serde")]
+impl<T: Hash + Serialize> Serialize for Hmac<T> {
+    fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
+        Serialize::serialize(&self.0, s)
+    }
+}
+
+#[cfg(feature = "serde")]
+impl<'de, T: Hash + Deserialize<'de>> Deserialize<'de> for Hmac<T> {
+    fn deserialize<D: Deserializer<'de>>(d: D) -> Result<Hmac<T>, D::Error> {
+        let bytes = Deserialize::deserialize(d)?;
+        Ok(Hmac(bytes))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    #[cfg(feature = "alloc")]
+    fn test() {
+        use crate::{sha256, Hash, HashEngine, Hmac, HmacEngine};
+
+        #[derive(Clone)]
+        struct Test {
+            key: Vec<u8>,
+            input: Vec<u8>,
+            output: Vec<u8>,
+        }
+
+        #[rustfmt::skip]
+        let tests = vec![
+            // Test vectors copied from libsecp256k1
+            // Sadly the RFC2104 test vectors all use MD5 as their underlying hash function,
+            // which of course this library does not support.
+            Test {
+                key: vec![ 0x0b; 20],
+                input: vec![0x48, 0x69, 0x20, 0x54, 0x68, 0x65, 0x72, 0x65],
+                output: vec![
+                    0xb0, 0x34, 0x4c, 0x61, 0xd8, 0xdb, 0x38, 0x53,
+                    0x5c, 0xa8, 0xaf, 0xce, 0xaf, 0x0b, 0xf1, 0x2b,
+                    0x88, 0x1d, 0xc2, 0x00, 0xc9, 0x83, 0x3d, 0xa7,
+                    0x26, 0xe9, 0x37, 0x6c, 0x2e, 0x32, 0xcf, 0xf7,
+                ],
+            },
+            Test {
+                key: vec![ 0x4a, 0x65, 0x66, 0x65 ],
+                input: vec![
+                    0x77, 0x68, 0x61, 0x74, 0x20, 0x64, 0x6f, 0x20,
+                    0x79, 0x61, 0x20, 0x77, 0x61, 0x6e, 0x74, 0x20,
+                    0x66, 0x6f, 0x72, 0x20, 0x6e, 0x6f, 0x74, 0x68,
+                    0x69, 0x6e, 0x67, 0x3f,
+                ],
+                output: vec![
+                    0x5b, 0xdc, 0xc1, 0x46, 0xbf, 0x60, 0x75, 0x4e,
+                    0x6a, 0x04, 0x24, 0x26, 0x08, 0x95, 0x75, 0xc7,
+                    0x5a, 0x00, 0x3f, 0x08, 0x9d, 0x27, 0x39, 0x83,
+                    0x9d, 0xec, 0x58, 0xb9, 0x64, 0xec, 0x38, 0x43,
+                ],
+            },
+            Test {
+                key: vec![ 0xaa; 20 ],
+                input: vec![ 0xdd; 50 ],
+                output: vec![
+                    0x77, 0x3e, 0xa9, 0x1e, 0x36, 0x80, 0x0e, 0x46,
+                    0x85, 0x4d, 0xb8, 0xeb, 0xd0, 0x91, 0x81, 0xa7,
+                    0x29, 0x59, 0x09, 0x8b, 0x3e, 0xf8, 0xc1, 0x22,
+                    0xd9, 0x63, 0x55, 0x14, 0xce, 0xd5, 0x65, 0xfe,
+                ],
+            },
+            Test {
+                key: vec![
+                    0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+                    0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
+                    0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
+                    0x19
+                ],
+                input: vec![ 0xcd; 50 ],
+                output: vec![
+                    0x82, 0x55, 0x8a, 0x38, 0x9a, 0x44, 0x3c, 0x0e,
+                    0xa4, 0xcc, 0x81, 0x98, 0x99, 0xf2, 0x08, 0x3a,
+                    0x85, 0xf0, 0xfa, 0xa3, 0xe5, 0x78, 0xf8, 0x07,
+                    0x7a, 0x2e, 0x3f, 0xf4, 0x67, 0x29, 0x66, 0x5b,
+                ],
+            },
+            Test {
+                key: vec! [ 0xaa; 131 ],
+                input: vec![
+                    0x54, 0x65, 0x73, 0x74, 0x20, 0x55, 0x73, 0x69,
+                    0x6e, 0x67, 0x20, 0x4c, 0x61, 0x72, 0x67, 0x65,
+                    0x72, 0x20, 0x54, 0x68, 0x61, 0x6e, 0x20, 0x42,
+                    0x6c, 0x6f, 0x63, 0x6b, 0x2d, 0x53, 0x69, 0x7a,
+                    0x65, 0x20, 0x4b, 0x65, 0x79, 0x20, 0x2d, 0x20,
+                    0x48, 0x61, 0x73, 0x68, 0x20, 0x4b, 0x65, 0x79,
+                    0x20, 0x46, 0x69, 0x72, 0x73, 0x74,
+                ],
+                output: vec![
+                    0x60, 0xe4, 0x31, 0x59, 0x1e, 0xe0, 0xb6, 0x7f,
+                    0x0d, 0x8a, 0x26, 0xaa, 0xcb, 0xf5, 0xb7, 0x7f,
+                    0x8e, 0x0b, 0xc6, 0x21, 0x37, 0x28, 0xc5, 0x14,
+                    0x05, 0x46, 0x04, 0x0f, 0x0e, 0xe3, 0x7f, 0x54,
+                ],
+            },
+            Test {
+                key: vec! [ 0xaa; 131 ],
+                input: vec![
+                    0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20,
+                    0x61, 0x20, 0x74, 0x65, 0x73, 0x74, 0x20, 0x75,
+                    0x73, 0x69, 0x6e, 0x67, 0x20, 0x61, 0x20, 0x6c,
+                    0x61, 0x72, 0x67, 0x65, 0x72, 0x20, 0x74, 0x68,
+                    0x61, 0x6e, 0x20, 0x62, 0x6c, 0x6f, 0x63, 0x6b,
+                    0x2d, 0x73, 0x69, 0x7a, 0x65, 0x20, 0x6b, 0x65,
+                    0x79, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x61, 0x20,
+                    0x6c, 0x61, 0x72, 0x67, 0x65, 0x72, 0x20, 0x74,
+                    0x68, 0x61, 0x6e, 0x20, 0x62, 0x6c, 0x6f, 0x63,
+                    0x6b, 0x2d, 0x73, 0x69, 0x7a, 0x65, 0x20, 0x64,
+                    0x61, 0x74, 0x61, 0x2e, 0x20, 0x54, 0x68, 0x65,
+                    0x20, 0x6b, 0x65, 0x79, 0x20, 0x6e, 0x65, 0x65,
+                    0x64, 0x73, 0x20, 0x74, 0x6f, 0x20, 0x62, 0x65,
+                    0x20, 0x68, 0x61, 0x73, 0x68, 0x65, 0x64, 0x20,
+                    0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x20, 0x62,
+                    0x65, 0x69, 0x6e, 0x67, 0x20, 0x75, 0x73, 0x65,
+                    0x64, 0x20, 0x62, 0x79, 0x20, 0x74, 0x68, 0x65,
+                    0x20, 0x48, 0x4d, 0x41, 0x43, 0x20, 0x61, 0x6c,
+                    0x67, 0x6f, 0x72, 0x69, 0x74, 0x68, 0x6d, 0x2e,
+                ],
+                output: vec![
+                    0x9b, 0x09, 0xff, 0xa7, 0x1b, 0x94, 0x2f, 0xcb,
+                    0x27, 0x63, 0x5f, 0xbc, 0xd5, 0xb0, 0xe9, 0x44,
+                    0xbf, 0xdc, 0x63, 0x64, 0x4f, 0x07, 0x13, 0x93,
+                    0x8a, 0x7f, 0x51, 0x53, 0x5c, 0x3a, 0x35, 0xe2,
+                ],
+            },
+        ];
+
+        for test in tests {
+            let mut engine = HmacEngine::<sha256::Hash>::new(&test.key);
+            engine.input(&test.input);
+            let hash = Hmac::<sha256::Hash>::from_engine(engine);
+            assert_eq!(&hash[..], &test.output[..]);
+            assert_eq!(hash.as_byte_array(), test.output.as_slice());
+        }
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn hmac_sha512_serde() {
+        use serde_test::{assert_tokens, Configure, Token};
+
+        use crate::{sha512, Hash, Hmac};
+
+        #[rustfmt::skip]
+        static HASH_BYTES: [u8; 64] = [
+            0x8b, 0x41, 0xe1, 0xb7, 0x8a, 0xd1, 0x15, 0x21,
+            0x11, 0x3c, 0x52, 0xff, 0x18, 0x2a, 0x1b, 0x8e,
+            0x0a, 0x19, 0x57, 0x54, 0xaa, 0x52, 0x7f, 0xcd,
+            0x00, 0xa4, 0x11, 0x62, 0x0b, 0x46, 0xf2, 0x0f,
+            0xff, 0xfb, 0x80, 0x88, 0xcc, 0xf8, 0x54, 0x97,
+            0x12, 0x1a, 0xd4, 0x49, 0x9e, 0x08, 0x45, 0xb8,
+            0x76, 0xf6, 0xdd, 0x66, 0x40, 0x08, 0x8a, 0x2f,
+            0x0b, 0x2d, 0x8a, 0x60, 0x0b, 0xdf, 0x4c, 0x0c,
+        ];
+
+        let hash = Hmac::<sha512::Hash>::from_slice(&HASH_BYTES).expect("right number of bytes");
+        assert_tokens(&hash.compact(), &[Token::BorrowedBytes(&HASH_BYTES[..])]);
+        assert_tokens(
+            &hash.readable(),
+            &[Token::Str(
+                "8b41e1b78ad11521113c52ff182a1b8e0a195754aa527fcd00a411620b46f20f\
+                 fffb8088ccf85497121ad4499e0845b876f6dd6640088a2f0b2d8a600bdf4c0c",
+            )],
+        );
+    }
+}
+
+#[cfg(bench)]
+mod benches {
+    use test::Bencher;
+
+    use crate::{sha256, Hash, HashEngine, Hmac};
+
+    #[bench]
+    pub fn hmac_sha256_10(bh: &mut Bencher) {
+        let mut engine = Hmac::<sha256::Hash>::engine();
+        let bytes = [1u8; 10];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn hmac_sha256_1k(bh: &mut Bencher) {
+        let mut engine = Hmac::<sha256::Hash>::engine();
+        let bytes = [1u8; 1024];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn hmac_sha256_64k(bh: &mut Bencher) {
+        let mut engine = Hmac::<sha256::Hash>::engine();
+        let bytes = [1u8; 65536];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+}
diff --git a/hashes/src/impls.rs b/hashes/src/impls.rs
new file mode 100644
index 000000000..18bb2373d
--- /dev/null
+++ b/hashes/src/impls.rs
@@ -0,0 +1,176 @@
+// Bitcoin Hashes Library
+// Written in 2019 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! `std` / `core2` Impls.
+//!
+//! Implementations of traits defined in `std` / `core2` and not in `core`.
+//!
+
+#[cfg(feature = "std")]
+use std::io;
+
+#[cfg(not(feature = "std"))]
+use core2::io;
+
+use crate::{hmac, ripemd160, sha1, sha256, sha512, siphash24, HashEngine};
+
+impl io::Write for sha1::HashEngine {
+    fn flush(&mut self) -> io::Result<()> { Ok(()) }
+
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        self.input(buf);
+        Ok(buf.len())
+    }
+}
+
+impl io::Write for sha256::HashEngine {
+    fn flush(&mut self) -> io::Result<()> { Ok(()) }
+
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        self.input(buf);
+        Ok(buf.len())
+    }
+}
+
+impl io::Write for sha512::HashEngine {
+    fn flush(&mut self) -> io::Result<()> { Ok(()) }
+
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        self.input(buf);
+        Ok(buf.len())
+    }
+}
+
+impl io::Write for ripemd160::HashEngine {
+    fn flush(&mut self) -> io::Result<()> { Ok(()) }
+
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        self.input(buf);
+        Ok(buf.len())
+    }
+}
+
+impl io::Write for siphash24::HashEngine {
+    fn flush(&mut self) -> io::Result<()> { Ok(()) }
+
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        self.input(buf);
+        Ok(buf.len())
+    }
+}
+
+impl<T: crate::Hash> io::Write for hmac::HmacEngine<T> {
+    fn flush(&mut self) -> io::Result<()> { Ok(()) }
+
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        self.input(buf);
+        Ok(buf.len())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::io::Write;
+    use crate::{hash160, hmac, ripemd160, sha1, sha256, sha256d, sha512, siphash24, Hash};
+
+    macro_rules! write_test {
+        ($mod:ident, $exp_empty:expr, $exp_256:expr, $exp_64k:expr,) => {
+            #[test]
+            fn $mod() {
+                let mut engine = $mod::Hash::engine();
+                engine.write_all(&[]).unwrap();
+                assert_eq!(format!("{}", $mod::Hash::from_engine(engine)), $exp_empty);
+
+                let mut engine = $mod::Hash::engine();
+                engine.write_all(&[1; 256]).unwrap();
+                assert_eq!(format!("{}", $mod::Hash::from_engine(engine)), $exp_256);
+
+                let mut engine = $mod::Hash::engine();
+                engine.write_all(&[99; 64000]).unwrap();
+                assert_eq!(format!("{}", $mod::Hash::from_engine(engine)), $exp_64k);
+            }
+        };
+    }
+
+    write_test!(
+        sha1,
+        "da39a3ee5e6b4b0d3255bfef95601890afd80709",
+        "ac458b067c6b021c7e9358229b636e9d1e4cb154",
+        "e4b66838f9f7b6f91e5be32a02ae78094df402e7",
+    );
+
+    write_test!(
+        sha256,
+        "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+        "2661920f2409dd6c8adeb0c44972959f232b6429afa913845d0fd95e7e768234",
+        "5c5e904f5d4fd587c7a906bf846e08a927286f388c54c39213a4884695271bbc",
+    );
+
+    write_test!(
+        sha256d,
+        "56944c5d3f98413ef45cf54545538103cc9f298e0575820ad3591376e2e0f65d",
+        "374000d830c75d10d9417e493a7652920f30efbd300e3fb092f24c28c20baf64",
+        "0050d4148ad7a0437ca0643fad5bf4614cd95d9ba21fde52370b37dcc3f03307",
+    );
+
+    write_test!(
+        sha512,
+        "cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce\
+         47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e",
+        "57ecf739d3a7ca647639adae80a05f4f361304bfcbfa1ceba93296b096e74287\
+         45fc10c142cecdd3bb587a3dba598c072f6f78b31cc0a06a3da0105ee51f75d6",
+        "dd28f78c53f3bc9bd0c2dca9642a1ad402a70412f985c1f6e54fadb98ce9c458\
+         4761df8d04ed04bb734ba48dd2106bb9ea54524f1394cdd18e6da3166e71c3ee",
+    );
+
+    write_test!(
+        ripemd160,
+        "9c1185a5c5e9fc54612808977ee8f548b2258d31",
+        "e571a1ca5b780aa52bafdb9ec852544ffca418ba",
+        "ddd2ecce739e823629c7d46ab18918e9c4a51c75",
+    );
+
+    write_test!(
+        hash160,
+        "b472a266d0bd89c13706a4132ccfb16f7c3b9fcb",
+        "671356a1a874695ad3bc20cae440f4360835bd5a",
+        "a9608c952c8dbcc20c53803d2ca5ad31d64d9313",
+    );
+
+    write_test!(siphash24, "d70077739d4b921e", "3a3ccefde9b5b1e3", "ce456e4e4ecbc5bf",);
+
+    #[test]
+    fn hmac() {
+        let mut engine = hmac::HmacEngine::<sha256::Hash>::new(&[0xde, 0xad, 0xbe, 0xef]);
+        engine.write_all(&[]).unwrap();
+        assert_eq!(
+            format!("{}", hmac::Hmac::from_engine(engine)),
+            "bf5515149cf797955c4d3194cca42472883281951697c8375d9d9b107f384225"
+        );
+
+        let mut engine = hmac::HmacEngine::<sha256::Hash>::new(&[0xde, 0xad, 0xbe, 0xef]);
+        engine.write_all(&[1; 256]).unwrap();
+        assert_eq!(
+            format!("{}", hmac::Hmac::from_engine(engine)),
+            "59c9aca10c81c73cb4c196d94db741b6bf2050e0153d5a45f2526bff34675ac5"
+        );
+
+        let mut engine = hmac::HmacEngine::<sha256::Hash>::new(&[0xde, 0xad, 0xbe, 0xef]);
+        engine.write_all(&[99; 64000]).unwrap();
+        assert_eq!(
+            format!("{}", hmac::Hmac::from_engine(engine)),
+            "30df499717415a395379a1eaabe50038036e4abb5afc94aa55c952f4aa57be08"
+        );
+    }
+}
diff --git a/hashes/src/internal_macros.rs b/hashes/src/internal_macros.rs
new file mode 100644
index 000000000..5bd5aff23
--- /dev/null
+++ b/hashes/src/internal_macros.rs
@@ -0,0 +1,215 @@
+//! Non-public macros
+
+macro_rules! arr_newtype_fmt_impl {
+    ($ty:ident, $bytes:expr $(, $gen:ident: $gent:ident)*) => {
+        impl<$($gen: $gent),*> $crate::_export::_core::fmt::LowerHex for $ty<$($gen),*> {
+            #[inline]
+            fn fmt(&self, f: &mut $crate::_export::_core::fmt::Formatter) -> $crate::_export::_core::fmt::Result {
+                #[allow(unused)]
+                use crate::Hash as _;
+                let case = internals::hex::Case::Lower;
+                if <$ty<$($gen),*>>::DISPLAY_BACKWARD {
+                    internals::hex::display::fmt_hex_exact!(f, $bytes, self.0.iter().rev(), case)
+                } else {
+                    internals::hex::display::fmt_hex_exact!(f, $bytes, self.0.iter(), case)
+                }
+            }
+        }
+
+        impl<$($gen: $gent),*> $crate::_export::_core::fmt::UpperHex for $ty<$($gen),*> {
+            #[inline]
+            fn fmt(&self, f: &mut $crate::_export::_core::fmt::Formatter) -> $crate::_export::_core::fmt::Result {
+                #[allow(unused)]
+                use crate::Hash as _;
+                let case = internals::hex::Case::Upper;
+                if <$ty<$($gen),*>>::DISPLAY_BACKWARD {
+                    internals::hex::display::fmt_hex_exact!(f, $bytes, self.0.iter().rev(), case)
+                } else {
+                    internals::hex::display::fmt_hex_exact!(f, $bytes, self.0.iter(), case)
+                }
+            }
+        }
+
+        impl<$($gen: $gent),*> $crate::_export::_core::fmt::Display for $ty<$($gen),*> {
+            #[inline]
+            fn fmt(&self, f: &mut $crate::_export::_core::fmt::Formatter) -> $crate::_export::_core::fmt::Result {
+                $crate::_export::_core::fmt::LowerHex::fmt(self, f)
+            }
+        }
+
+        impl<$($gen: $gent),*> $crate::_export::_core::fmt::Debug for $ty<$($gen),*> {
+            #[inline]
+            fn fmt(&self, f: &mut $crate::_export::_core::fmt::Formatter) -> $crate::_export::_core::fmt::Result {
+                write!(f, "{:#}", self)
+            }
+        }
+    }
+}
+pub(crate) use arr_newtype_fmt_impl;
+
+/// Adds trait impls to the type called `Hash` in the current scope.
+///
+/// Implpements various conversion traits as well as the [`crate::Hash`] trait.
+/// Arguments:
+///
+/// * `$bits` - number of bits this hash type has
+/// * `$reverse` - `bool`  - `true` if the hash type should be displayed backwards, `false`
+///    otherwise.
+/// * `$gen: $gent` - generic type(s) and trait bound(s)
+///
+/// Restrictions on usage:
+///
+/// * There must be a free-standing `fn from_engine(HashEngine) -> Hash` in the scope
+/// * `fn internal_new([u8; $bits / 8]) -> Self` must exist on `Hash`
+/// * `fn internal_engine() -> HashEngine` must exist on `Hash`
+///
+/// `from_engine` obviously implements the finalization algorithm.
+/// `internal_new` is required so that types with more than one field are constructible.
+/// `internal_engine` is required to initialize the engine for given hash type.
+macro_rules! hash_trait_impls {
+    ($bits:expr, $reverse:expr $(, $gen:ident: $gent:ident)*) => {
+        impl<$($gen: $gent),*> Hash<$($gen),*> {
+            /// Displays hex forwards, regardless of how this type would display it naturally.
+            ///
+            /// This is mainly intended as an internal method and you shouldn't need it unless
+            /// you're doing something special.
+            pub fn forward_hex(&self) -> impl '_ + core::fmt::LowerHex + core::fmt::UpperHex {
+                internals::hex::display::DisplayHex::as_hex(&self.0)
+            }
+
+            /// Displays hex backwards, regardless of how this type would display it naturally.
+            ///
+            /// This is mainly intended as an internal method and you shouldn't need it unless
+            /// you're doing something special.
+            pub fn backward_hex(&self) -> impl '_ + core::fmt::LowerHex + core::fmt::UpperHex {
+                internals::hex::display::DisplayArray::<_, [u8; $bits / 8 * 2]>::new(self.0.iter().rev())
+            }
+
+            /// Zero cost conversion between a fixed length byte array shared reference and
+            /// a shared reference to this Hash type.
+            pub fn from_bytes_ref(bytes: &[u8; $bits / 8]) -> &Self {
+                // Safety: Sound because Self is #[repr(transparent)] containing [u8; $bits / 8]
+                unsafe { &*(bytes as *const _ as *const Self) }
+            }
+
+            /// Zero cost conversion between a fixed length byte array exclusive reference and
+            /// an exclusive reference to this Hash type.
+            pub fn from_bytes_mut(bytes: &mut [u8; $bits / 8]) -> &mut Self {
+                // Safety: Sound because Self is #[repr(transparent)] containing [u8; $bits / 8]
+                unsafe { &mut *(bytes as *mut _ as *mut Self) }
+            }
+        }
+
+        impl<$($gen: $gent),*> str::FromStr for Hash<$($gen),*> {
+            type Err = $crate::hex::Error;
+            fn from_str(s: &str) -> Result<Self, Self::Err> {
+                use $crate::hex::{FromHex, HexIterator};
+                use $crate::Hash;
+
+                let inner: [u8; $bits / 8] = if $reverse {
+                    FromHex::from_byte_iter(HexIterator::new(s)?.rev())?
+                } else {
+                    FromHex::from_byte_iter(HexIterator::new(s)?)?
+                };
+                Ok(Self::from_byte_array(inner))
+            }
+        }
+
+        $crate::internal_macros::arr_newtype_fmt_impl!(Hash, $bits / 8 $(, $gen: $gent)*);
+        serde_impl!(Hash, $bits / 8 $(, $gen: $gent)*);
+        borrow_slice_impl!(Hash $(, $gen: $gent)*);
+
+        impl<$($gen: $gent),*> $crate::_export::_core::convert::AsRef<[u8; $bits / 8]> for Hash<$($gen),*> {
+            fn as_ref(&self) -> &[u8; $bits / 8] {
+                &self.0
+            }
+        }
+
+        impl<I: SliceIndex<[u8]> $(, $gen: $gent)*> Index<I> for Hash<$($gen),*> {
+            type Output = I::Output;
+
+            #[inline]
+            fn index(&self, index: I) -> &Self::Output {
+                &self.0[index]
+            }
+        }
+
+        impl<$($gen: $gent),*> crate::Hash for Hash<$($gen),*> {
+            type Engine = HashEngine;
+            type Bytes = [u8; $bits / 8];
+
+            const LEN: usize = $bits / 8;
+            const DISPLAY_BACKWARD: bool = $reverse;
+
+            fn engine() -> Self::Engine {
+                Self::internal_engine()
+            }
+
+            fn from_engine(e: HashEngine) -> Hash<$($gen),*> {
+                from_engine(e)
+            }
+
+            fn from_slice(sl: &[u8]) -> Result<Hash<$($gen),*>, Error> {
+                if sl.len() != $bits / 8 {
+                    Err(Error::InvalidLength(Self::LEN, sl.len()))
+                } else {
+                    let mut ret = [0; $bits / 8];
+                    ret.copy_from_slice(sl);
+                    Ok(Self::internal_new(ret))
+                }
+            }
+
+            fn to_byte_array(self) -> Self::Bytes {
+                self.0
+            }
+
+            fn as_byte_array(&self) -> &Self::Bytes {
+                &self.0
+            }
+
+            fn from_byte_array(bytes: Self::Bytes) -> Self {
+                Self::internal_new(bytes)
+            }
+
+            fn all_zeros() -> Self {
+                Hash::internal_new([0x00; $bits / 8])
+            }
+        }
+    }
+}
+pub(crate) use hash_trait_impls;
+
+/// Creates a type called `Hash` and implements standard interface for it.
+///
+/// The created type will have all standard derives, `Hash` impl and implementation of
+/// `internal_engine` returning default. The created type has a single field.
+///
+/// Arguments:
+///
+/// * `$bits` - the number of bits of the hash type
+/// * `$reverse` - `true` if the hash should be displayed backwards, `false` otherwise
+/// * `$doc` - doc string to put on the type
+/// * `$schemars` - a literal that goes into `schema_with`.
+///
+/// The `from_engine` free-standing function is still required with this macro. See the doc of
+/// [`hash_trait_impls`].
+macro_rules! hash_type {
+    ($bits:expr, $reverse:expr, $doc:literal, $schemars:literal) => {
+        #[doc = $doc]
+        #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+        #[cfg_attr(feature = "schemars", derive(crate::schemars::JsonSchema))]
+        #[repr(transparent)]
+        pub struct Hash(
+            #[cfg_attr(feature = "schemars", schemars(schema_with = $schemars))] [u8; $bits / 8],
+        );
+
+        impl Hash {
+            fn internal_new(arr: [u8; $bits / 8]) -> Self { Hash(arr) }
+
+            fn internal_engine() -> HashEngine { Default::default() }
+        }
+
+        crate::internal_macros::hash_trait_impls!($bits, $reverse);
+    };
+}
+pub(crate) use hash_type;
diff --git a/hashes/src/lib.rs b/hashes/src/lib.rs
new file mode 100644
index 000000000..169a8ce65
--- /dev/null
+++ b/hashes/src/lib.rs
@@ -0,0 +1,254 @@
+// Dash Hashes Library
+// Written in 2018 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Rust hashes library.
+//!
+//! This is a simple, no-dependency library which implements the hash functions
+//! needed by Bitcoin. These are SHA256, SHA256d, and RIPEMD160. As an ancillary
+//! thing, it exposes hexadecimal serialization and deserialization, since these
+//! are needed to display hashes anway.
+//!
+//! ## Commonly used operations
+//!
+//! Hashing a single byte slice or a string:
+//!
+//! ```rust
+//! use dashcore_hashes::sha256;
+//! use dashcore_hashes::Hash;
+//!
+//! let bytes = [0u8; 5];
+//! let hash_of_bytes = sha256::Hash::hash(&bytes);
+//! let hash_of_string = sha256::Hash::hash("some string".as_bytes());
+//! ```
+//!
+//!
+//! Hashing content from a reader:
+//!
+//! ```rust
+//! use dashcore_hashes::sha256;
+//! use dashcore_hashes::Hash;
+//!
+//! #[cfg(std)]
+//! # fn main() -> std::io::Result<()> {
+//! let mut reader: &[u8] = b"hello"; // in real code, this could be a `File` or `TcpStream`
+//! let mut engine = sha256::HashEngine::default();
+//! std::io::copy(&mut reader, &mut engine)?;
+//! let hash = sha256::Hash::from_engine(engine);
+//! # Ok(())
+//! # }
+//!
+//! #[cfg(not(std))]
+//! # fn main() {}
+//! ```
+//!
+//!
+//! Hashing content by [`std::io::Write`] on HashEngine:
+//!
+//! ```rust
+//! use dashcore_hashes::sha256;
+//! use dashcore_hashes::Hash;
+//! use std::io::Write;
+//!
+//! #[cfg(std)]
+//! # fn main() -> std::io::Result<()> {
+//! let mut part1: &[u8] = b"hello";
+//! let mut part2: &[u8] = b" ";
+//! let mut part3: &[u8] = b"world";
+//! let mut engine = sha256::HashEngine::default();
+//! engine.write_all(part1)?;
+//! engine.write_all(part2)?;
+//! engine.write_all(part3)?;
+//! let hash = sha256::Hash::from_engine(engine);
+//! # Ok(())
+//! # }
+//!
+//! #[cfg(not(std))]
+//! # fn main() {}
+//! ```
+
+// Coding conventions
+#![warn(missing_docs)]
+// Experimental features we need.
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![cfg_attr(bench, feature(test))]
+// In general, rust is absolutely horrid at supporting users doing things like,
+// for example, compiling Rust code for real environments. Disable useless lints
+// that don't do anything but annoy us and cant actually ever be resolved.
+#![allow(bare_trait_objects)]
+#![allow(ellipsis_inclusive_range_patterns)]
+#![cfg_attr(all(not(test), not(feature = "std")), no_std)]
+// Instead of littering the codebase for non-fuzzing code just globally allow.
+#![cfg_attr(fuzzing, allow(dead_code, unused_imports))]
+
+#[cfg(all(feature = "alloc", not(feature = "std")))]
+extern crate alloc;
+#[cfg(any(test, feature = "std"))]
+extern crate core;
+#[cfg(feature = "core2")]
+extern crate core2;
+#[cfg(feature = "serde")]
+pub extern crate serde;
+#[cfg(all(test, feature = "serde"))]
+extern crate serde_test;
+#[cfg(bench)]
+extern crate test;
+
+#[doc(hidden)]
+pub mod _export {
+    /// A re-export of core::*
+    pub mod _core {
+        pub use core::*;
+    }
+}
+
+#[cfg(feature = "schemars")]
+extern crate actual_schemars as schemars;
+
+mod internal_macros;
+#[macro_use]
+mod util;
+#[macro_use]
+pub mod serde_macros;
+pub mod cmp;
+pub mod error;
+pub mod hash160;
+pub mod hex;
+pub mod hmac;
+#[cfg(any(feature = "std", feature = "core2"))]
+mod impls;
+pub mod ripemd160;
+pub mod sha1;
+pub mod sha256;
+pub mod sha256d;
+pub mod sha256t;
+pub mod sha512;
+pub mod sha512_256;
+pub mod siphash24;
+pub mod hash_x11;
+
+use core::{borrow, fmt, hash, ops};
+
+pub use error::Error;
+pub use hmac::{Hmac, HmacEngine};
+
+/// A hashing engine which bytes can be serialized into.
+pub trait HashEngine: Clone + Default {
+    /// Byte array representing the internal state of the hash engine.
+    type MidState;
+
+    /// Outputs the midstate of the hash engine. This function should not be
+    /// used directly unless you really know what you're doing.
+    fn midstate(&self) -> Self::MidState;
+
+    /// Length of the hash's internal block size, in bytes.
+    const BLOCK_SIZE: usize;
+
+    /// Add data to the hash engine.
+    fn input(&mut self, data: &[u8]);
+
+    /// Return the number of bytes already n_bytes_hashed(inputted).
+    fn n_bytes_hashed(&self) -> usize;
+}
+
+/// Trait which applies to hashes of all types.
+pub trait Hash:
+    Copy
+    + Clone
+    + PartialEq
+    + Eq
+    + PartialOrd
+    + Ord
+    + hash::Hash
+    + fmt::Debug
+    + fmt::Display
+    + fmt::LowerHex
+    + ops::Index<ops::RangeFull, Output = [u8]>
+    + ops::Index<ops::RangeFrom<usize>, Output = [u8]>
+    + ops::Index<ops::RangeTo<usize>, Output = [u8]>
+    + ops::Index<ops::Range<usize>, Output = [u8]>
+    + ops::Index<usize, Output = u8>
+    + borrow::Borrow<[u8]>
+{
+    /// A hashing engine which bytes can be serialized into. It is expected
+    /// to implement the `io::Write` trait, and to never return errors under
+    /// any conditions.
+    type Engine: HashEngine;
+
+    /// The byte array that represents the hash internally.
+    type Bytes: hex::FromHex + Copy;
+
+    /// Constructs a new engine.
+    fn engine() -> Self::Engine { Self::Engine::default() }
+
+    /// Produces a hash from the current state of a given engine.
+    fn from_engine(e: Self::Engine) -> Self;
+
+    /// Length of the hash, in bytes.
+    const LEN: usize;
+
+    /// Copies a byte slice into a hash object.
+    fn from_slice(sl: &[u8]) -> Result<Self, Error>;
+
+    /// Hashes some bytes.
+    fn hash(data: &[u8]) -> Self {
+        let mut engine = Self::engine();
+        engine.input(data);
+        Self::from_engine(engine)
+    }
+
+    /// Flag indicating whether user-visible serializations of this hash
+    /// should be backward. For some reason Satoshi decided this should be
+    /// true for `Sha256dHash`, so here we are.
+    const DISPLAY_BACKWARD: bool = false;
+
+    /// Returns the underlying byte array.
+    fn to_byte_array(self) -> Self::Bytes;
+
+    /// Returns a reference to the underlying byte array.
+    fn as_byte_array(&self) -> &Self::Bytes;
+
+    /// Constructs a hash from the underlying byte array.
+    fn from_byte_array(bytes: Self::Bytes) -> Self;
+
+    /// Returns an all zero hash.
+    ///
+    /// An all zeros hash is a made up construct because there is not a known input that can create
+    /// it, however it is used in various places in Bitcoin e.g., the Bitcoin genesis block's
+    /// previous blockhash and the coinbase transaction's outpoint txid.
+    fn all_zeros() -> Self;
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::{sha256d, Hash};
+
+    hash_newtype! {
+        /// A test newtype
+        struct TestNewtype(sha256d::Hash);
+
+        /// A test newtype
+        struct TestNewtype2(sha256d::Hash);
+    }
+
+    #[test]
+    fn convert_newtypes() {
+        let h1 = TestNewtype::hash(&[]);
+        let h2: TestNewtype2 = h1.to_raw_hash().into();
+        assert_eq!(&h1[..], &h2[..]);
+
+        let h = sha256d::Hash::hash(&[]);
+        let h2: TestNewtype = h.to_string().parse().unwrap();
+        assert_eq!(h2.to_raw_hash(), h);
+    }
+}
diff --git a/hashes/src/ripemd160.rs b/hashes/src/ripemd160.rs
new file mode 100644
index 000000000..2d4dc68d7
--- /dev/null
+++ b/hashes/src/ripemd160.rs
@@ -0,0 +1,557 @@
+// Bitcoin Hashes Library
+// Written in 2018 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+// This module is largely copied from the rust-crypto ripemd.rs file;
+// while rust-crypto is licensed under Apache, that file specifically
+// was written entirely by Andrew Poelstra, who is re-licensing its
+// contents here as CC0.
+
+//! RIPEMD160 implementation.
+//!
+
+use core::convert::TryInto;
+use core::ops::Index;
+use core::slice::SliceIndex;
+use core::{cmp, str};
+
+use crate::{Error, HashEngine as _};
+
+crate::internal_macros::hash_type! {
+    160,
+    false,
+    "Output of the RIPEMD160 hash function.",
+    "crate::util::json_hex_string::len_20"
+}
+
+#[cfg(not(fuzzing))]
+fn from_engine(mut e: HashEngine) -> Hash {
+    // pad buffer with a single 1-bit then all 0s, until there are exactly 8 bytes remaining
+    let data_len = e.length as u64;
+
+    let zeroes = [0; BLOCK_SIZE - 8];
+    e.input(&[0x80]);
+    if e.length % BLOCK_SIZE > zeroes.len() {
+        e.input(&zeroes);
+    }
+    let pad_length = zeroes.len() - (e.length % BLOCK_SIZE);
+    e.input(&zeroes[..pad_length]);
+    debug_assert_eq!(e.length % BLOCK_SIZE, zeroes.len());
+
+    e.input(&(8 * data_len).to_le_bytes());
+    debug_assert_eq!(e.length % BLOCK_SIZE, 0);
+
+    Hash(e.midstate())
+}
+
+#[cfg(fuzzing)]
+fn from_engine(e: HashEngine) -> Hash {
+    let mut res = e.midstate();
+    res[0] ^= (e.length & 0xff) as u8;
+    Hash(res)
+}
+
+const BLOCK_SIZE: usize = 64;
+
+/// Engine to compute RIPEMD160 hash function.
+#[derive(Clone)]
+pub struct HashEngine {
+    buffer: [u8; BLOCK_SIZE],
+    h: [u32; 5],
+    length: usize,
+}
+
+impl Default for HashEngine {
+    fn default() -> Self {
+        HashEngine {
+            h: [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0],
+            length: 0,
+            buffer: [0; BLOCK_SIZE],
+        }
+    }
+}
+
+impl crate::HashEngine for HashEngine {
+    type MidState = [u8; 20];
+
+    #[cfg(not(fuzzing))]
+    fn midstate(&self) -> [u8; 20] {
+        let mut ret = [0; 20];
+        for (val, ret_bytes) in self.h.iter().zip(ret.chunks_exact_mut(4)) {
+            ret_bytes.copy_from_slice(&(*val).to_le_bytes());
+        }
+        ret
+    }
+
+    #[cfg(fuzzing)]
+    fn midstate(&self) -> [u8; 20] {
+        let mut ret = [0; 20];
+        ret.copy_from_slice(&self.buffer[..20]);
+        ret
+    }
+
+    const BLOCK_SIZE: usize = 64;
+
+    fn n_bytes_hashed(&self) -> usize { self.length }
+
+    engine_input_impl!();
+}
+
+macro_rules! round(
+    ($a:expr, $b:expr, $c:expr, $d:expr, $e:expr,
+     $x:expr, $bits:expr, $add:expr, $round:expr) => ({
+        $a = $a.wrapping_add($round).wrapping_add($x).wrapping_add($add);
+        $a = $a.rotate_left($bits).wrapping_add($e);
+        $c = $c.rotate_left(10);
+    });
+);
+
+macro_rules! process_block(
+    ($h:expr, $data:expr,
+     $( round1: h_ordering $f0:expr, $f1:expr, $f2:expr, $f3:expr, $f4:expr;
+                data_index $data_index1:expr; roll_shift $bits1:expr; )*
+     $( round2: h_ordering $g0:expr, $g1:expr, $g2:expr, $g3:expr, $g4:expr;
+                data_index $data_index2:expr; roll_shift $bits2:expr; )*
+     $( round3: h_ordering $h0:expr, $h1:expr, $h2:expr, $h3:expr, $h4:expr;
+                data_index $data_index3:expr; roll_shift $bits3:expr; )*
+     $( round4: h_ordering $i0:expr, $i1:expr, $i2:expr, $i3:expr, $i4:expr;
+                data_index $data_index4:expr; roll_shift $bits4:expr; )*
+     $( round5: h_ordering $j0:expr, $j1:expr, $j2:expr, $j3:expr, $j4:expr;
+                data_index $data_index5:expr; roll_shift $bits5:expr; )*
+     $( par_round1: h_ordering $pj0:expr, $pj1:expr, $pj2:expr, $pj3:expr, $pj4:expr;
+                    data_index $pdata_index1:expr; roll_shift $pbits1:expr; )*
+     $( par_round2: h_ordering $pi0:expr, $pi1:expr, $pi2:expr, $pi3:expr, $pi4:expr;
+                    data_index $pdata_index2:expr; roll_shift $pbits2:expr; )*
+     $( par_round3: h_ordering $ph0:expr, $ph1:expr, $ph2:expr, $ph3:expr, $ph4:expr;
+                    data_index $pdata_index3:expr; roll_shift $pbits3:expr; )*
+     $( par_round4: h_ordering $pg0:expr, $pg1:expr, $pg2:expr, $pg3:expr, $pg4:expr;
+                    data_index $pdata_index4:expr; roll_shift $pbits4:expr; )*
+     $( par_round5: h_ordering $pf0:expr, $pf1:expr, $pf2:expr, $pf3:expr, $pf4:expr;
+                    data_index $pdata_index5:expr; roll_shift $pbits5:expr; )*
+    ) => ({
+        let mut bb = $h;
+        let mut bbb = $h;
+
+        // Round 1
+        $( round!(bb[$f0], bb[$f1], bb[$f2], bb[$f3], bb[$f4],
+                  $data[$data_index1], $bits1, 0x00000000,
+                  bb[$f1] ^ bb[$f2] ^ bb[$f3]); )*
+
+        // Round 2
+        $( round!(bb[$g0], bb[$g1], bb[$g2], bb[$g3], bb[$g4],
+                  $data[$data_index2], $bits2, 0x5a827999,
+                  (bb[$g1] & bb[$g2]) | (!bb[$g1] & bb[$g3])); )*
+
+        // Round 3
+        $( round!(bb[$h0], bb[$h1], bb[$h2], bb[$h3], bb[$h4],
+                  $data[$data_index3], $bits3, 0x6ed9eba1,
+                  (bb[$h1] | !bb[$h2]) ^ bb[$h3]); )*
+
+        // Round 4
+        $( round!(bb[$i0], bb[$i1], bb[$i2], bb[$i3], bb[$i4],
+                  $data[$data_index4], $bits4, 0x8f1bbcdc,
+                  (bb[$i1] & bb[$i3]) | (bb[$i2] & !bb[$i3])); )*
+
+        // Round 5
+        $( round!(bb[$j0], bb[$j1], bb[$j2], bb[$j3], bb[$j4],
+                  $data[$data_index5], $bits5, 0xa953fd4e,
+                  bb[$j1] ^ (bb[$j2] | !bb[$j3])); )*
+
+        // Parallel rounds: these are the same as the previous five
+        // rounds except that the constants have changed, we work
+        // with the other buffer, and they are applied in reverse
+        // order.
+
+        // Parallel Round 1
+        $( round!(bbb[$pj0], bbb[$pj1], bbb[$pj2], bbb[$pj3], bbb[$pj4],
+                  $data[$pdata_index1], $pbits1, 0x50a28be6,
+                  bbb[$pj1] ^ (bbb[$pj2] | !bbb[$pj3])); )*
+
+        // Porallel Round 2
+        $( round!(bbb[$pi0], bbb[$pi1], bbb[$pi2], bbb[$pi3], bbb[$pi4],
+                  $data[$pdata_index2], $pbits2, 0x5c4dd124,
+                  (bbb[$pi1] & bbb[$pi3]) | (bbb[$pi2] & !bbb[$pi3])); )*
+
+        // Parallel Round 3
+        $( round!(bbb[$ph0], bbb[$ph1], bbb[$ph2], bbb[$ph3], bbb[$ph4],
+                  $data[$pdata_index3], $pbits3, 0x6d703ef3,
+                  (bbb[$ph1] | !bbb[$ph2]) ^ bbb[$ph3]); )*
+
+        // Parallel Round 4
+        $( round!(bbb[$pg0], bbb[$pg1], bbb[$pg2], bbb[$pg3], bbb[$pg4],
+                  $data[$pdata_index4], $pbits4, 0x7a6d76e9,
+                  (bbb[$pg1] & bbb[$pg2]) | (!bbb[$pg1] & bbb[$pg3])); )*
+
+        // Parallel Round 5
+        $( round!(bbb[$pf0], bbb[$pf1], bbb[$pf2], bbb[$pf3], bbb[$pf4],
+                  $data[$pdata_index5], $pbits5, 0x00000000,
+                  bbb[$pf1] ^ bbb[$pf2] ^ bbb[$pf3]); )*
+
+        // Combine results
+        bbb[3] = bbb[3].wrapping_add($h[1]).wrapping_add(bb[2]);
+        $h[1]  =  $h[2].wrapping_add(bb[3]).wrapping_add(bbb[4]);
+        $h[2]  =  $h[3].wrapping_add(bb[4]).wrapping_add(bbb[0]);
+        $h[3]  =  $h[4].wrapping_add(bb[0]).wrapping_add(bbb[1]);
+        $h[4]  =  $h[0].wrapping_add(bb[1]).wrapping_add(bbb[2]);
+        $h[0]  =                                         bbb[3];
+    });
+);
+
+impl HashEngine {
+    fn process_block(&mut self) {
+        debug_assert_eq!(self.buffer.len(), BLOCK_SIZE);
+
+        let mut w = [0u32; 16];
+        for (w_val, buff_bytes) in w.iter_mut().zip(self.buffer.chunks_exact(4)) {
+            *w_val = u32::from_le_bytes(buff_bytes.try_into().expect("4 byte slice"))
+        }
+
+        process_block!(self.h, w,
+            // Round 1
+            round1: h_ordering 0, 1, 2, 3, 4; data_index  0; roll_shift 11;
+            round1: h_ordering 4, 0, 1, 2, 3; data_index  1; roll_shift 14;
+            round1: h_ordering 3, 4, 0, 1, 2; data_index  2; roll_shift 15;
+            round1: h_ordering 2, 3, 4, 0, 1; data_index  3; roll_shift 12;
+            round1: h_ordering 1, 2, 3, 4, 0; data_index  4; roll_shift  5;
+            round1: h_ordering 0, 1, 2, 3, 4; data_index  5; roll_shift  8;
+            round1: h_ordering 4, 0, 1, 2, 3; data_index  6; roll_shift  7;
+            round1: h_ordering 3, 4, 0, 1, 2; data_index  7; roll_shift  9;
+            round1: h_ordering 2, 3, 4, 0, 1; data_index  8; roll_shift 11;
+            round1: h_ordering 1, 2, 3, 4, 0; data_index  9; roll_shift 13;
+            round1: h_ordering 0, 1, 2, 3, 4; data_index 10; roll_shift 14;
+            round1: h_ordering 4, 0, 1, 2, 3; data_index 11; roll_shift 15;
+            round1: h_ordering 3, 4, 0, 1, 2; data_index 12; roll_shift  6;
+            round1: h_ordering 2, 3, 4, 0, 1; data_index 13; roll_shift  7;
+            round1: h_ordering 1, 2, 3, 4, 0; data_index 14; roll_shift  9;
+            round1: h_ordering 0, 1, 2, 3, 4; data_index 15; roll_shift  8;
+
+            // Round 2
+            round2: h_ordering 4, 0, 1, 2, 3; data_index  7; roll_shift  7;
+            round2: h_ordering 3, 4, 0, 1, 2; data_index  4; roll_shift  6;
+            round2: h_ordering 2, 3, 4, 0, 1; data_index 13; roll_shift  8;
+            round2: h_ordering 1, 2, 3, 4, 0; data_index  1; roll_shift 13;
+            round2: h_ordering 0, 1, 2, 3, 4; data_index 10; roll_shift 11;
+            round2: h_ordering 4, 0, 1, 2, 3; data_index  6; roll_shift  9;
+            round2: h_ordering 3, 4, 0, 1, 2; data_index 15; roll_shift  7;
+            round2: h_ordering 2, 3, 4, 0, 1; data_index  3; roll_shift 15;
+            round2: h_ordering 1, 2, 3, 4, 0; data_index 12; roll_shift  7;
+            round2: h_ordering 0, 1, 2, 3, 4; data_index  0; roll_shift 12;
+            round2: h_ordering 4, 0, 1, 2, 3; data_index  9; roll_shift 15;
+            round2: h_ordering 3, 4, 0, 1, 2; data_index  5; roll_shift  9;
+            round2: h_ordering 2, 3, 4, 0, 1; data_index  2; roll_shift 11;
+            round2: h_ordering 1, 2, 3, 4, 0; data_index 14; roll_shift  7;
+            round2: h_ordering 0, 1, 2, 3, 4; data_index 11; roll_shift 13;
+            round2: h_ordering 4, 0, 1, 2, 3; data_index  8; roll_shift 12;
+
+            // Round 3
+            round3: h_ordering 3, 4, 0, 1, 2; data_index  3; roll_shift 11;
+            round3: h_ordering 2, 3, 4, 0, 1; data_index 10; roll_shift 13;
+            round3: h_ordering 1, 2, 3, 4, 0; data_index 14; roll_shift  6;
+            round3: h_ordering 0, 1, 2, 3, 4; data_index  4; roll_shift  7;
+            round3: h_ordering 4, 0, 1, 2, 3; data_index  9; roll_shift 14;
+            round3: h_ordering 3, 4, 0, 1, 2; data_index 15; roll_shift  9;
+            round3: h_ordering 2, 3, 4, 0, 1; data_index  8; roll_shift 13;
+            round3: h_ordering 1, 2, 3, 4, 0; data_index  1; roll_shift 15;
+            round3: h_ordering 0, 1, 2, 3, 4; data_index  2; roll_shift 14;
+            round3: h_ordering 4, 0, 1, 2, 3; data_index  7; roll_shift  8;
+            round3: h_ordering 3, 4, 0, 1, 2; data_index  0; roll_shift 13;
+            round3: h_ordering 2, 3, 4, 0, 1; data_index  6; roll_shift  6;
+            round3: h_ordering 1, 2, 3, 4, 0; data_index 13; roll_shift  5;
+            round3: h_ordering 0, 1, 2, 3, 4; data_index 11; roll_shift 12;
+            round3: h_ordering 4, 0, 1, 2, 3; data_index  5; roll_shift  7;
+            round3: h_ordering 3, 4, 0, 1, 2; data_index 12; roll_shift  5;
+
+            // Round 4
+            round4: h_ordering 2, 3, 4, 0, 1; data_index  1; roll_shift 11;
+            round4: h_ordering 1, 2, 3, 4, 0; data_index  9; roll_shift 12;
+            round4: h_ordering 0, 1, 2, 3, 4; data_index 11; roll_shift 14;
+            round4: h_ordering 4, 0, 1, 2, 3; data_index 10; roll_shift 15;
+            round4: h_ordering 3, 4, 0, 1, 2; data_index  0; roll_shift 14;
+            round4: h_ordering 2, 3, 4, 0, 1; data_index  8; roll_shift 15;
+            round4: h_ordering 1, 2, 3, 4, 0; data_index 12; roll_shift  9;
+            round4: h_ordering 0, 1, 2, 3, 4; data_index  4; roll_shift  8;
+            round4: h_ordering 4, 0, 1, 2, 3; data_index 13; roll_shift  9;
+            round4: h_ordering 3, 4, 0, 1, 2; data_index  3; roll_shift 14;
+            round4: h_ordering 2, 3, 4, 0, 1; data_index  7; roll_shift  5;
+            round4: h_ordering 1, 2, 3, 4, 0; data_index 15; roll_shift  6;
+            round4: h_ordering 0, 1, 2, 3, 4; data_index 14; roll_shift  8;
+            round4: h_ordering 4, 0, 1, 2, 3; data_index  5; roll_shift  6;
+            round4: h_ordering 3, 4, 0, 1, 2; data_index  6; roll_shift  5;
+            round4: h_ordering 2, 3, 4, 0, 1; data_index  2; roll_shift 12;
+
+            // Round 5
+            round5: h_ordering 1, 2, 3, 4, 0; data_index  4; roll_shift  9;
+            round5: h_ordering 0, 1, 2, 3, 4; data_index  0; roll_shift 15;
+            round5: h_ordering 4, 0, 1, 2, 3; data_index  5; roll_shift  5;
+            round5: h_ordering 3, 4, 0, 1, 2; data_index  9; roll_shift 11;
+            round5: h_ordering 2, 3, 4, 0, 1; data_index  7; roll_shift  6;
+            round5: h_ordering 1, 2, 3, 4, 0; data_index 12; roll_shift  8;
+            round5: h_ordering 0, 1, 2, 3, 4; data_index  2; roll_shift 13;
+            round5: h_ordering 4, 0, 1, 2, 3; data_index 10; roll_shift 12;
+            round5: h_ordering 3, 4, 0, 1, 2; data_index 14; roll_shift  5;
+            round5: h_ordering 2, 3, 4, 0, 1; data_index  1; roll_shift 12;
+            round5: h_ordering 1, 2, 3, 4, 0; data_index  3; roll_shift 13;
+            round5: h_ordering 0, 1, 2, 3, 4; data_index  8; roll_shift 14;
+            round5: h_ordering 4, 0, 1, 2, 3; data_index 11; roll_shift 11;
+            round5: h_ordering 3, 4, 0, 1, 2; data_index  6; roll_shift  8;
+            round5: h_ordering 2, 3, 4, 0, 1; data_index 15; roll_shift  5;
+            round5: h_ordering 1, 2, 3, 4, 0; data_index 13; roll_shift  6;
+
+            // Porallel Round 1;
+            par_round1: h_ordering 0, 1, 2, 3, 4; data_index  5; roll_shift  8;
+            par_round1: h_ordering 4, 0, 1, 2, 3; data_index 14; roll_shift  9;
+            par_round1: h_ordering 3, 4, 0, 1, 2; data_index  7; roll_shift  9;
+            par_round1: h_ordering 2, 3, 4, 0, 1; data_index  0; roll_shift 11;
+            par_round1: h_ordering 1, 2, 3, 4, 0; data_index  9; roll_shift 13;
+            par_round1: h_ordering 0, 1, 2, 3, 4; data_index  2; roll_shift 15;
+            par_round1: h_ordering 4, 0, 1, 2, 3; data_index 11; roll_shift 15;
+            par_round1: h_ordering 3, 4, 0, 1, 2; data_index  4; roll_shift  5;
+            par_round1: h_ordering 2, 3, 4, 0, 1; data_index 13; roll_shift  7;
+            par_round1: h_ordering 1, 2, 3, 4, 0; data_index  6; roll_shift  7;
+            par_round1: h_ordering 0, 1, 2, 3, 4; data_index 15; roll_shift  8;
+            par_round1: h_ordering 4, 0, 1, 2, 3; data_index  8; roll_shift 11;
+            par_round1: h_ordering 3, 4, 0, 1, 2; data_index  1; roll_shift 14;
+            par_round1: h_ordering 2, 3, 4, 0, 1; data_index 10; roll_shift 14;
+            par_round1: h_ordering 1, 2, 3, 4, 0; data_index  3; roll_shift 12;
+            par_round1: h_ordering 0, 1, 2, 3, 4; data_index 12; roll_shift  6;
+
+            // Parallel Round 2
+            par_round2: h_ordering 4, 0, 1, 2, 3; data_index  6; roll_shift  9;
+            par_round2: h_ordering 3, 4, 0, 1, 2; data_index 11; roll_shift 13;
+            par_round2: h_ordering 2, 3, 4, 0, 1; data_index  3; roll_shift 15;
+            par_round2: h_ordering 1, 2, 3, 4, 0; data_index  7; roll_shift  7;
+            par_round2: h_ordering 0, 1, 2, 3, 4; data_index  0; roll_shift 12;
+            par_round2: h_ordering 4, 0, 1, 2, 3; data_index 13; roll_shift  8;
+            par_round2: h_ordering 3, 4, 0, 1, 2; data_index  5; roll_shift  9;
+            par_round2: h_ordering 2, 3, 4, 0, 1; data_index 10; roll_shift 11;
+            par_round2: h_ordering 1, 2, 3, 4, 0; data_index 14; roll_shift  7;
+            par_round2: h_ordering 0, 1, 2, 3, 4; data_index 15; roll_shift  7;
+            par_round2: h_ordering 4, 0, 1, 2, 3; data_index  8; roll_shift 12;
+            par_round2: h_ordering 3, 4, 0, 1, 2; data_index 12; roll_shift  7;
+            par_round2: h_ordering 2, 3, 4, 0, 1; data_index  4; roll_shift  6;
+            par_round2: h_ordering 1, 2, 3, 4, 0; data_index  9; roll_shift 15;
+            par_round2: h_ordering 0, 1, 2, 3, 4; data_index  1; roll_shift 13;
+            par_round2: h_ordering 4, 0, 1, 2, 3; data_index  2; roll_shift 11;
+
+            // Parallel Round 3
+            par_round3: h_ordering 3, 4, 0, 1, 2; data_index 15; roll_shift  9;
+            par_round3: h_ordering 2, 3, 4, 0, 1; data_index  5; roll_shift  7;
+            par_round3: h_ordering 1, 2, 3, 4, 0; data_index  1; roll_shift 15;
+            par_round3: h_ordering 0, 1, 2, 3, 4; data_index  3; roll_shift 11;
+            par_round3: h_ordering 4, 0, 1, 2, 3; data_index  7; roll_shift  8;
+            par_round3: h_ordering 3, 4, 0, 1, 2; data_index 14; roll_shift  6;
+            par_round3: h_ordering 2, 3, 4, 0, 1; data_index  6; roll_shift  6;
+            par_round3: h_ordering 1, 2, 3, 4, 0; data_index  9; roll_shift 14;
+            par_round3: h_ordering 0, 1, 2, 3, 4; data_index 11; roll_shift 12;
+            par_round3: h_ordering 4, 0, 1, 2, 3; data_index  8; roll_shift 13;
+            par_round3: h_ordering 3, 4, 0, 1, 2; data_index 12; roll_shift  5;
+            par_round3: h_ordering 2, 3, 4, 0, 1; data_index  2; roll_shift 14;
+            par_round3: h_ordering 1, 2, 3, 4, 0; data_index 10; roll_shift 13;
+            par_round3: h_ordering 0, 1, 2, 3, 4; data_index  0; roll_shift 13;
+            par_round3: h_ordering 4, 0, 1, 2, 3; data_index  4; roll_shift  7;
+            par_round3: h_ordering 3, 4, 0, 1, 2; data_index 13; roll_shift  5;
+
+            // Parallel Round 4
+            par_round4: h_ordering 2, 3, 4, 0, 1; data_index  8; roll_shift 15;
+            par_round4: h_ordering 1, 2, 3, 4, 0; data_index  6; roll_shift  5;
+            par_round4: h_ordering 0, 1, 2, 3, 4; data_index  4; roll_shift  8;
+            par_round4: h_ordering 4, 0, 1, 2, 3; data_index  1; roll_shift 11;
+            par_round4: h_ordering 3, 4, 0, 1, 2; data_index  3; roll_shift 14;
+            par_round4: h_ordering 2, 3, 4, 0, 1; data_index 11; roll_shift 14;
+            par_round4: h_ordering 1, 2, 3, 4, 0; data_index 15; roll_shift  6;
+            par_round4: h_ordering 0, 1, 2, 3, 4; data_index  0; roll_shift 14;
+            par_round4: h_ordering 4, 0, 1, 2, 3; data_index  5; roll_shift  6;
+            par_round4: h_ordering 3, 4, 0, 1, 2; data_index 12; roll_shift  9;
+            par_round4: h_ordering 2, 3, 4, 0, 1; data_index  2; roll_shift 12;
+            par_round4: h_ordering 1, 2, 3, 4, 0; data_index 13; roll_shift  9;
+            par_round4: h_ordering 0, 1, 2, 3, 4; data_index  9; roll_shift 12;
+            par_round4: h_ordering 4, 0, 1, 2, 3; data_index  7; roll_shift  5;
+            par_round4: h_ordering 3, 4, 0, 1, 2; data_index 10; roll_shift 15;
+            par_round4: h_ordering 2, 3, 4, 0, 1; data_index 14; roll_shift  8;
+
+            // Parallel Round 5
+            par_round5: h_ordering 1, 2, 3, 4, 0; data_index 12; roll_shift  8;
+            par_round5: h_ordering 0, 1, 2, 3, 4; data_index 15; roll_shift  5;
+            par_round5: h_ordering 4, 0, 1, 2, 3; data_index 10; roll_shift 12;
+            par_round5: h_ordering 3, 4, 0, 1, 2; data_index  4; roll_shift  9;
+            par_round5: h_ordering 2, 3, 4, 0, 1; data_index  1; roll_shift 12;
+            par_round5: h_ordering 1, 2, 3, 4, 0; data_index  5; roll_shift  5;
+            par_round5: h_ordering 0, 1, 2, 3, 4; data_index  8; roll_shift 14;
+            par_round5: h_ordering 4, 0, 1, 2, 3; data_index  7; roll_shift  6;
+            par_round5: h_ordering 3, 4, 0, 1, 2; data_index  6; roll_shift  8;
+            par_round5: h_ordering 2, 3, 4, 0, 1; data_index  2; roll_shift 13;
+            par_round5: h_ordering 1, 2, 3, 4, 0; data_index 13; roll_shift  6;
+            par_round5: h_ordering 0, 1, 2, 3, 4; data_index 14; roll_shift  5;
+            par_round5: h_ordering 4, 0, 1, 2, 3; data_index  0; roll_shift 15;
+            par_round5: h_ordering 3, 4, 0, 1, 2; data_index  3; roll_shift 13;
+            par_round5: h_ordering 2, 3, 4, 0, 1; data_index  9; roll_shift 11;
+            par_round5: h_ordering 1, 2, 3, 4, 0; data_index 11; roll_shift 11;
+        );
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    #[cfg(feature = "alloc")]
+    fn test() {
+        use std::convert::TryFrom;
+
+        use crate::{ripemd160, Hash, HashEngine};
+
+        #[derive(Clone)]
+        struct Test {
+            input: &'static str,
+            output: Vec<u8>,
+            output_str: &'static str,
+        }
+
+        #[rustfmt::skip]
+        let tests = vec![
+            // Test messages from FIPS 180-1
+            Test {
+                input: "abc",
+                output: vec![
+                    0x8e, 0xb2, 0x08, 0xf7,
+                    0xe0, 0x5d, 0x98, 0x7a,
+                    0x9b, 0x04, 0x4a, 0x8e,
+                    0x98, 0xc6, 0xb0, 0x87,
+                    0xf1, 0x5a, 0x0b, 0xfc,
+                ],
+                output_str: "8eb208f7e05d987a9b044a8e98c6b087f15a0bfc"
+            },
+            Test {
+                input:
+                     "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+                output: vec![
+                    0x12, 0xa0, 0x53, 0x38,
+                    0x4a, 0x9c, 0x0c, 0x88,
+                    0xe4, 0x05, 0xa0, 0x6c,
+                    0x27, 0xdc, 0xf4, 0x9a,
+                    0xda, 0x62, 0xeb, 0x2b,
+                ],
+                output_str: "12a053384a9c0c88e405a06c27dcf49ada62eb2b"
+            },
+            // Examples from wikipedia
+            Test {
+                input: "The quick brown fox jumps over the lazy dog",
+                output: vec![
+                    0x37, 0xf3, 0x32, 0xf6,
+                    0x8d, 0xb7, 0x7b, 0xd9,
+                    0xd7, 0xed, 0xd4, 0x96,
+                    0x95, 0x71, 0xad, 0x67,
+                    0x1c, 0xf9, 0xdd, 0x3b,
+                ],
+                output_str: "37f332f68db77bd9d7edd4969571ad671cf9dd3b",
+            },
+            Test {
+                input: "The quick brown fox jumps over the lazy cog",
+                output: vec![
+                    0x13, 0x20, 0x72, 0xdf,
+                    0x69, 0x09, 0x33, 0x83,
+                    0x5e, 0xb8, 0xb6, 0xad,
+                    0x0b, 0x77, 0xe7, 0xb6,
+                    0xf1, 0x4a, 0xca, 0xd7,
+                ],
+                output_str: "132072df690933835eb8b6ad0b77e7b6f14acad7",
+            },
+        ];
+
+        for mut test in tests {
+            // Hash through high-level API, check hex encoding/decoding
+            let hash = ripemd160::Hash::hash(test.input.as_bytes());
+            assert_eq!(hash, test.output_str.parse::<ripemd160::Hash>().expect("parse hex"));
+            assert_eq!(&hash[..], &test.output[..]);
+            assert_eq!(&hash.to_string(), &test.output_str);
+            assert_eq!(
+                ripemd160::Hash::from_bytes_ref(
+                    <&[u8; 20]>::try_from(&*test.output).expect("known length")
+                ),
+                &hash
+            );
+            assert_eq!(
+                ripemd160::Hash::from_bytes_mut(
+                    <&mut [u8; 20]>::try_from(&mut *test.output).expect("known length")
+                ),
+                &hash
+            );
+
+            // Hash through engine, checking that we can input byte by byte
+            let mut engine = ripemd160::Hash::engine();
+            for ch in test.input.as_bytes() {
+                engine.input(&[*ch]);
+            }
+            let manual_hash = ripemd160::Hash::from_engine(engine);
+            assert_eq!(hash, manual_hash);
+            assert_eq!(hash.as_byte_array(), test.output.as_slice());
+        }
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn ripemd_serde() {
+        use serde_test::{assert_tokens, Configure, Token};
+
+        use crate::{ripemd160, Hash};
+
+        #[rustfmt::skip]
+        static HASH_BYTES: [u8; 20] = [
+            0x13, 0x20, 0x72, 0xdf,
+            0x69, 0x09, 0x33, 0x83,
+            0x5e, 0xb8, 0xb6, 0xad,
+            0x0b, 0x77, 0xe7, 0xb6,
+            0xf1, 0x4a, 0xca, 0xd7,
+        ];
+
+        let hash = ripemd160::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        assert_tokens(&hash.compact(), &[Token::BorrowedBytes(&HASH_BYTES[..])]);
+        assert_tokens(&hash.readable(), &[Token::Str("132072df690933835eb8b6ad0b77e7b6f14acad7")]);
+    }
+}
+
+#[cfg(bench)]
+mod benches {
+    use test::Bencher;
+
+    use crate::{ripemd160, Hash, HashEngine};
+
+    #[bench]
+    pub fn ripemd160_10(bh: &mut Bencher) {
+        let mut engine = ripemd160::Hash::engine();
+        let bytes = [1u8; 10];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn ripemd160_1k(bh: &mut Bencher) {
+        let mut engine = ripemd160::Hash::engine();
+        let bytes = [1u8; 1024];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn ripemd160_64k(bh: &mut Bencher) {
+        let mut engine = ripemd160::Hash::engine();
+        let bytes = [1u8; 65536];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+}
diff --git a/hashes/src/serde_macros.rs b/hashes/src/serde_macros.rs
new file mode 100644
index 000000000..b60dbe4c8
--- /dev/null
+++ b/hashes/src/serde_macros.rs
@@ -0,0 +1,153 @@
+// Bitcoin Hashes Library
+// Written in 2018 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! Macros for serde trait implementations, and supporting code.
+//!
+
+/// Functions used by serde impls of all hashes.
+#[cfg(feature = "serde")]
+pub mod serde_details {
+    use core::marker::PhantomData;
+    use core::str::FromStr;
+    use core::{fmt, ops, str};
+
+    use crate::Error;
+    struct HexVisitor<ValueT>(PhantomData<ValueT>);
+    use serde::{de, Deserializer, Serializer};
+
+    impl<'de, ValueT> de::Visitor<'de> for HexVisitor<ValueT>
+    where
+        ValueT: FromStr,
+        <ValueT as FromStr>::Err: fmt::Display,
+    {
+        type Value = ValueT;
+
+        fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+            formatter.write_str("an ASCII hex string")
+        }
+
+        fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
+        where
+            E: de::Error,
+        {
+            if let Ok(hex) = str::from_utf8(v) {
+                Self::Value::from_str(hex).map_err(E::custom)
+            } else {
+                return Err(E::invalid_value(de::Unexpected::Bytes(v), &self));
+            }
+        }
+
+        fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+        where
+            E: de::Error,
+        {
+            Self::Value::from_str(v).map_err(E::custom)
+        }
+    }
+
+    struct BytesVisitor<ValueT>(PhantomData<ValueT>);
+
+    impl<'de, ValueT> de::Visitor<'de> for BytesVisitor<ValueT>
+    where
+        ValueT: SerdeHash,
+        <ValueT as FromStr>::Err: fmt::Display,
+    {
+        type Value = ValueT;
+
+        fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+            formatter.write_str("a bytestring")
+        }
+
+        fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
+        where
+            E: de::Error,
+        {
+            SerdeHash::from_slice_delegated(v).map_err(|_| {
+                // from_slice only errors on incorrect length
+                E::invalid_length(v.len(), &stringify!(N))
+            })
+        }
+    }
+
+    /// Default serialization/deserialization methods.
+    pub trait SerdeHash
+    where
+        Self: Sized
+            + FromStr
+            + fmt::Display
+            + ops::Index<usize, Output = u8>
+            + ops::Index<ops::RangeFull, Output = [u8]>,
+        <Self as FromStr>::Err: fmt::Display,
+    {
+        /// Size, in bits, of the hash.
+        const N: usize;
+
+        /// Helper function to turn a deserialized slice into the correct hash type.
+        fn from_slice_delegated(sl: &[u8]) -> Result<Self, Error>;
+
+        /// Do serde serialization.
+        fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
+            if s.is_human_readable() {
+                s.collect_str(self)
+            } else {
+                s.serialize_bytes(&self[..])
+            }
+        }
+
+        /// Do serde deserialization.
+        fn deserialize<'de, D: Deserializer<'de>>(d: D) -> Result<Self, D::Error> {
+            if d.is_human_readable() {
+                d.deserialize_str(HexVisitor::<Self>(PhantomData))
+            } else {
+                d.deserialize_bytes(BytesVisitor::<Self>(PhantomData))
+            }
+        }
+    }
+}
+
+/// Implements `Serialize` and `Deserialize` for a type `$t` which
+/// represents a newtype over a byte-slice over length `$len`.
+#[macro_export]
+#[cfg(feature = "serde")]
+macro_rules! serde_impl(
+    ($t:ident, $len:expr $(, $gen:ident: $gent:ident)*) => (
+        impl<$($gen: $gent),*> $crate::serde_macros::serde_details::SerdeHash for $t<$($gen),*> {
+            const N : usize = $len;
+            fn from_slice_delegated(sl: &[u8]) -> Result<Self, $crate::Error> {
+                #[allow(unused_imports)]
+                use $crate::Hash as _;
+                $t::from_slice(sl)
+            }
+        }
+
+        impl<$($gen: $gent),*> $crate::serde::Serialize for $t<$($gen),*> {
+            fn serialize<S: $crate::serde::Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
+                $crate::serde_macros::serde_details::SerdeHash::serialize(self, s)
+            }
+        }
+
+        impl<'de $(, $gen: $gent)*> $crate::serde::Deserialize<'de> for $t<$($gen),*> {
+            fn deserialize<D: $crate::serde::Deserializer<'de>>(d: D) -> Result<$t<$($gen),*>, D::Error> {
+                $crate::serde_macros::serde_details::SerdeHash::deserialize(d)
+            }
+        }
+));
+
+/// Does an "empty" serde implementation for the configuration without serde feature.
+#[macro_export]
+#[cfg(not(feature = "serde"))]
+#[cfg_attr(docsrs, doc(cfg(not(feature = "serde"))))]
+macro_rules! serde_impl(
+        ($t:ident, $len:expr $(, $gen:ident: $gent:ident)*) => ()
+);
diff --git a/hashes/src/sha1.rs b/hashes/src/sha1.rs
new file mode 100644
index 000000000..c5557e09c
--- /dev/null
+++ b/hashes/src/sha1.rs
@@ -0,0 +1,269 @@
+// Bitcoin Hashes Library
+// Written in 2018 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! SHA1 implementation.
+//!
+
+use core::convert::TryInto;
+use core::ops::Index;
+use core::slice::SliceIndex;
+use core::{cmp, str};
+
+use crate::{Error, HashEngine as _};
+
+crate::internal_macros::hash_type! {
+    160,
+    false,
+    "Output of the SHA1 hash function.",
+    "crate::util::json_hex_string::len_20"
+}
+
+fn from_engine(mut e: HashEngine) -> Hash {
+    // pad buffer with a single 1-bit then all 0s, until there are exactly 8 bytes remaining
+    let data_len = e.length as u64;
+
+    let zeroes = [0; BLOCK_SIZE - 8];
+    e.input(&[0x80]);
+    if e.length % BLOCK_SIZE > zeroes.len() {
+        e.input(&zeroes);
+    }
+    let pad_length = zeroes.len() - (e.length % BLOCK_SIZE);
+    e.input(&zeroes[..pad_length]);
+    debug_assert_eq!(e.length % BLOCK_SIZE, zeroes.len());
+
+    e.input(&(8 * data_len).to_be_bytes());
+    debug_assert_eq!(e.length % BLOCK_SIZE, 0);
+
+    Hash(e.midstate())
+}
+
+const BLOCK_SIZE: usize = 64;
+
+/// Engine to compute SHA1 hash function.
+#[derive(Clone)]
+pub struct HashEngine {
+    buffer: [u8; BLOCK_SIZE],
+    h: [u32; 5],
+    length: usize,
+}
+
+impl Default for HashEngine {
+    fn default() -> Self {
+        HashEngine {
+            h: [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0],
+            length: 0,
+            buffer: [0; BLOCK_SIZE],
+        }
+    }
+}
+
+impl crate::HashEngine for HashEngine {
+    type MidState = [u8; 20];
+
+    #[cfg(not(fuzzing))]
+    fn midstate(&self) -> [u8; 20] {
+        let mut ret = [0; 20];
+        for (val, ret_bytes) in self.h.iter().zip(ret.chunks_exact_mut(4)) {
+            ret_bytes.copy_from_slice(&val.to_be_bytes())
+        }
+        ret
+    }
+
+    #[cfg(fuzzing)]
+    fn midstate(&self) -> [u8; 20] {
+        let mut ret = [0; 20];
+        ret.copy_from_slice(&self.buffer[..20]);
+        ret
+    }
+
+    const BLOCK_SIZE: usize = 64;
+
+    fn n_bytes_hashed(&self) -> usize { self.length }
+
+    engine_input_impl!();
+}
+
+impl HashEngine {
+    // Basic unoptimized algorithm from Wikipedia
+    fn process_block(&mut self) {
+        debug_assert_eq!(self.buffer.len(), BLOCK_SIZE);
+
+        let mut w = [0u32; 80];
+        for (w_val, buff_bytes) in w.iter_mut().zip(self.buffer.chunks_exact(4)) {
+            *w_val = u32::from_be_bytes(buff_bytes.try_into().expect("4 bytes slice"))
+        }
+        for i in 16..80 {
+            w[i] = (w[i - 3] ^ w[i - 8] ^ w[i - 14] ^ w[i - 16]).rotate_left(1);
+        }
+
+        let mut a = self.h[0];
+        let mut b = self.h[1];
+        let mut c = self.h[2];
+        let mut d = self.h[3];
+        let mut e = self.h[4];
+
+        for (i, &wi) in w.iter().enumerate() {
+            let (f, k) = match i {
+                0...19 => ((b & c) | (!b & d), 0x5a827999),
+                20...39 => (b ^ c ^ d, 0x6ed9eba1),
+                40...59 => ((b & c) | (b & d) | (c & d), 0x8f1bbcdc),
+                60...79 => (b ^ c ^ d, 0xca62c1d6),
+                _ => unreachable!(),
+            };
+
+            let new_a =
+                a.rotate_left(5).wrapping_add(f).wrapping_add(e).wrapping_add(k).wrapping_add(wi);
+            e = d;
+            d = c;
+            c = b.rotate_left(30);
+            b = a;
+            a = new_a;
+        }
+
+        self.h[0] = self.h[0].wrapping_add(a);
+        self.h[1] = self.h[1].wrapping_add(b);
+        self.h[2] = self.h[2].wrapping_add(c);
+        self.h[3] = self.h[3].wrapping_add(d);
+        self.h[4] = self.h[4].wrapping_add(e);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    #[cfg(feature = "alloc")]
+    fn test() {
+        use crate::{sha1, Hash, HashEngine};
+
+        #[derive(Clone)]
+        struct Test {
+            input: &'static str,
+            output: Vec<u8>,
+            output_str: &'static str,
+        }
+
+        #[rustfmt::skip]
+        let tests = vec![
+            // Examples from wikipedia
+            Test {
+                input: "",
+                output: vec![
+                    0xda, 0x39, 0xa3, 0xee,
+                    0x5e, 0x6b, 0x4b, 0x0d,
+                    0x32, 0x55, 0xbf, 0xef,
+                    0x95, 0x60, 0x18, 0x90,
+                    0xaf, 0xd8, 0x07, 0x09,
+                ],
+                output_str: "da39a3ee5e6b4b0d3255bfef95601890afd80709"
+            },
+            Test {
+                input: "The quick brown fox jumps over the lazy dog",
+                output: vec![
+                    0x2f, 0xd4, 0xe1, 0xc6,
+                    0x7a, 0x2d, 0x28, 0xfc,
+                    0xed, 0x84, 0x9e, 0xe1,
+                    0xbb, 0x76, 0xe7, 0x39,
+                    0x1b, 0x93, 0xeb, 0x12,
+                ],
+                output_str: "2fd4e1c67a2d28fced849ee1bb76e7391b93eb12",
+            },
+            Test {
+                input: "The quick brown fox jumps over the lazy cog",
+                output: vec![
+                    0xde, 0x9f, 0x2c, 0x7f,
+                    0xd2, 0x5e, 0x1b, 0x3a,
+                    0xfa, 0xd3, 0xe8, 0x5a,
+                    0x0b, 0xd1, 0x7d, 0x9b,
+                    0x10, 0x0d, 0xb4, 0xb3,
+                ],
+                output_str: "de9f2c7fd25e1b3afad3e85a0bd17d9b100db4b3",
+            },
+        ];
+
+        for test in tests {
+            // Hash through high-level API, check hex encoding/decoding
+            let hash = sha1::Hash::hash(test.input.as_bytes());
+            assert_eq!(hash, test.output_str.parse::<sha1::Hash>().expect("parse hex"));
+            assert_eq!(&hash[..], &test.output[..]);
+            assert_eq!(&hash.to_string(), &test.output_str);
+
+            // Hash through engine, checking that we can input byte by byte
+            let mut engine = sha1::Hash::engine();
+            for ch in test.input.as_bytes() {
+                engine.input(&[*ch]);
+            }
+            let manual_hash = sha1::Hash::from_engine(engine);
+            assert_eq!(hash, manual_hash);
+            assert_eq!(hash.as_byte_array(), test.output.as_slice());
+        }
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn sha1_serde() {
+        use serde_test::{assert_tokens, Configure, Token};
+
+        use crate::{sha1, Hash};
+
+        #[rustfmt::skip]
+        static HASH_BYTES: [u8; 20] = [
+            0x13, 0x20, 0x72, 0xdf,
+            0x69, 0x09, 0x33, 0x83,
+            0x5e, 0xb8, 0xb6, 0xad,
+            0x0b, 0x77, 0xe7, 0xb6,
+            0xf1, 0x4a, 0xca, 0xd7,
+        ];
+
+        let hash = sha1::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        assert_tokens(&hash.compact(), &[Token::BorrowedBytes(&HASH_BYTES[..])]);
+        assert_tokens(&hash.readable(), &[Token::Str("132072df690933835eb8b6ad0b77e7b6f14acad7")]);
+    }
+}
+
+#[cfg(bench)]
+mod benches {
+    use test::Bencher;
+
+    use crate::{sha1, Hash, HashEngine};
+
+    #[bench]
+    pub fn sha1_10(bh: &mut Bencher) {
+        let mut engine = sha1::Hash::engine();
+        let bytes = [1u8; 10];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn sha1_1k(bh: &mut Bencher) {
+        let mut engine = sha1::Hash::engine();
+        let bytes = [1u8; 1024];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn sha1_64k(bh: &mut Bencher) {
+        let mut engine = sha1::Hash::engine();
+        let bytes = [1u8; 65536];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+}
diff --git a/hashes/src/sha256.rs b/hashes/src/sha256.rs
new file mode 100644
index 000000000..8166df96d
--- /dev/null
+++ b/hashes/src/sha256.rs
@@ -0,0 +1,752 @@
+// Bitcoin Hashes Library
+// Written in 2018 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! SHA256 implementation.
+//!
+
+use core::convert::TryInto;
+use core::ops::Index;
+use core::slice::SliceIndex;
+use core::{cmp, str};
+
+use crate::{hex, sha256d, Error, HashEngine as _};
+
+crate::internal_macros::hash_type! {
+    256,
+    false,
+    "Output of the SHA256 hash function.",
+    "crate::util::json_hex_string::len_32"
+}
+
+#[cfg(not(fuzzing))]
+fn from_engine(mut e: HashEngine) -> Hash {
+    // pad buffer with a single 1-bit then all 0s, until there are exactly 8 bytes remaining
+    let data_len = e.length as u64;
+
+    let zeroes = [0; BLOCK_SIZE - 8];
+    e.input(&[0x80]);
+    if e.length % BLOCK_SIZE > zeroes.len() {
+        e.input(&zeroes);
+    }
+    let pad_length = zeroes.len() - (e.length % BLOCK_SIZE);
+    e.input(&zeroes[..pad_length]);
+    debug_assert_eq!(e.length % BLOCK_SIZE, zeroes.len());
+
+    e.input(&(8 * data_len).to_be_bytes());
+    debug_assert_eq!(e.length % BLOCK_SIZE, 0);
+
+    Hash(e.midstate().to_byte_array())
+}
+
+#[cfg(fuzzing)]
+fn from_engine(e: HashEngine) -> Hash {
+    let mut hash = e.midstate().to_byte_array();
+    if hash == [0; 32] {
+        // Assume sha256 is secure and never generate 0-hashes (which represent invalid
+        // secp256k1 secret keys, causing downstream application breakage).
+        hash[0] = 1;
+    }
+    Hash(hash)
+}
+
+const BLOCK_SIZE: usize = 64;
+
+/// Engine to compute SHA256 hash function.
+#[derive(Clone)]
+pub struct HashEngine {
+    buffer: [u8; BLOCK_SIZE],
+    h: [u32; 8],
+    length: usize,
+}
+
+impl Default for HashEngine {
+    fn default() -> Self {
+        HashEngine {
+            h: [
+                0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab,
+                0x5be0cd19,
+            ],
+            length: 0,
+            buffer: [0; BLOCK_SIZE],
+        }
+    }
+}
+
+impl crate::HashEngine for HashEngine {
+    type MidState = Midstate;
+
+    #[cfg(not(fuzzing))]
+    fn midstate(&self) -> Midstate {
+        let mut ret = [0; 32];
+        for (val, ret_bytes) in self.h.iter().zip(ret.chunks_exact_mut(4)) {
+            ret_bytes.copy_from_slice(&val.to_be_bytes());
+        }
+        Midstate(ret)
+    }
+
+    #[cfg(fuzzing)]
+    fn midstate(&self) -> Midstate {
+        let mut ret = [0; 32];
+        ret.copy_from_slice(&self.buffer[..32]);
+        Midstate(ret)
+    }
+
+    const BLOCK_SIZE: usize = 64;
+
+    fn n_bytes_hashed(&self) -> usize { self.length }
+
+    engine_input_impl!();
+}
+
+impl Hash {
+    /// Iterate the sha256 algorithm to turn a sha256 hash into a sha256d hash
+    pub fn hash_again(&self) -> sha256d::Hash {
+        crate::Hash::from_byte_array(<Self as crate::Hash>::hash(&self.0).0)
+    }
+
+    /// Computes hash from `bytes` in `const` context.
+    ///
+    /// Warning: this function is inefficient. It should be only used in `const` context.
+    pub const fn const_hash(bytes: &[u8]) -> Self { Hash(Midstate::const_hash(bytes, true).0) }
+}
+
+/// Output of the SHA256 hash function.
+#[derive(Copy, Clone, PartialEq, Eq, Default, PartialOrd, Ord, Hash)]
+pub struct Midstate(pub [u8; 32]);
+
+crate::internal_macros::arr_newtype_fmt_impl!(Midstate, 32);
+serde_impl!(Midstate, 32);
+borrow_slice_impl!(Midstate);
+
+impl<I: SliceIndex<[u8]>> Index<I> for Midstate {
+    type Output = I::Output;
+
+    #[inline]
+    fn index(&self, index: I) -> &Self::Output { &self.0[index] }
+}
+
+impl str::FromStr for Midstate {
+    type Err = hex::Error;
+    fn from_str(s: &str) -> Result<Self, Self::Err> { hex::FromHex::from_hex(s) }
+}
+
+impl Midstate {
+    /// Length of the midstate, in bytes.
+    const LEN: usize = 32;
+
+    /// Flag indicating whether user-visible serializations of this hash
+    /// should be backward. For some reason Satoshi decided this should be
+    /// true for `Sha256dHash`, so here we are.
+    const DISPLAY_BACKWARD: bool = true;
+
+    /// Construct a new [`Midstate`] from the inner value.
+    pub const fn from_byte_array(inner: [u8; 32]) -> Self { Midstate(inner) }
+
+    /// Copies a byte slice into the [`Midstate`] object.
+    pub fn from_slice(sl: &[u8]) -> Result<Midstate, Error> {
+        if sl.len() != Self::LEN {
+            Err(Error::InvalidLength(Self::LEN, sl.len()))
+        } else {
+            let mut ret = [0; 32];
+            ret.copy_from_slice(sl);
+            Ok(Midstate(ret))
+        }
+    }
+
+    /// Unwraps the [`Midstate`] and returns the underlying byte array.
+    pub fn to_byte_array(self) -> [u8; 32] { self.0 }
+
+    /// Creates midstate for tagged hashes.
+    ///
+    /// Warning: this function is inefficient. It should be only used in `const` context.
+    ///
+    /// Computes non-finalized hash of `sha256(tag) || sha256(tag)` for use in
+    /// [`sha256t`](super::sha256t). It's provided for use with [`sha256t`](crate::sha256t).
+    pub const fn hash_tag(tag: &[u8]) -> Self {
+        let hash = Hash::const_hash(tag);
+        let mut buf = [0u8; 64];
+        let mut i = 0usize;
+        while i < buf.len() {
+            buf[i] = hash.0[i % hash.0.len()];
+            i += 1;
+        }
+        Self::const_hash(&buf, false)
+    }
+}
+
+impl hex::FromHex for Midstate {
+    fn from_byte_iter<I>(iter: I) -> Result<Self, hex::Error>
+    where
+        I: Iterator<Item = Result<u8, hex::Error>> + ExactSizeIterator + DoubleEndedIterator,
+    {
+        // DISPLAY_BACKWARD is true
+        Ok(Midstate::from_byte_array(hex::FromHex::from_byte_iter(iter.rev())?))
+    }
+}
+
+macro_rules! Ch( ($x:expr, $y:expr, $z:expr) => ($z ^ ($x & ($y ^ $z))) );
+macro_rules! Maj( ($x:expr, $y:expr, $z:expr) => (($x & $y) | ($z & ($x | $y))) );
+macro_rules! Sigma0( ($x:expr) => ($x.rotate_left(30) ^ $x.rotate_left(19) ^ $x.rotate_left(10)) );
+macro_rules! Sigma1( ($x:expr) => ( $x.rotate_left(26) ^ $x.rotate_left(21) ^ $x.rotate_left(7)) );
+macro_rules! sigma0( ($x:expr) => ($x.rotate_left(25) ^ $x.rotate_left(14) ^ ($x >> 3)) );
+macro_rules! sigma1( ($x:expr) => ($x.rotate_left(15) ^ $x.rotate_left(13) ^ ($x >> 10)) );
+
+macro_rules! round(
+    // first round
+    ($a:expr, $b:expr, $c:expr, $d:expr, $e:expr, $f:expr, $g:expr, $h:expr, $k:expr, $w:expr) => (
+        let t1 = $h.wrapping_add(Sigma1!($e)).wrapping_add(Ch!($e, $f, $g)).wrapping_add($k).wrapping_add($w);
+        let t2 = Sigma0!($a).wrapping_add(Maj!($a, $b, $c));
+        $d = $d.wrapping_add(t1);
+        $h = t1.wrapping_add(t2);
+    );
+    // later rounds we reassign $w before doing the first-round computation
+    ($a:expr, $b:expr, $c:expr, $d:expr, $e:expr, $f:expr, $g:expr, $h:expr, $k:expr, $w:expr, $w1:expr, $w2:expr, $w3:expr) => (
+        $w = $w.wrapping_add(sigma1!($w1)).wrapping_add($w2).wrapping_add(sigma0!($w3));
+        round!($a, $b, $c, $d, $e, $f, $g, $h, $k, $w);
+    )
+);
+
+impl Midstate {
+    #[allow(clippy::identity_op)] // more readble
+    const fn read_u32(bytes: &[u8], index: usize) -> u32 {
+        ((bytes[index + 0] as u32) << 24)
+            | ((bytes[index + 1] as u32) << 16)
+            | ((bytes[index + 2] as u32) << 8)
+            | ((bytes[index + 3] as u32) << 0)
+    }
+
+    const fn copy_w(bytes: &[u8], index: usize) -> [u32; 16] {
+        let mut w = [0u32; 16];
+        let mut i = 0;
+        while i < 16 {
+            w[i] = Self::read_u32(bytes, index + i * 4);
+            i += 1;
+        }
+        w
+    }
+
+    const fn const_hash(bytes: &[u8], finalize: bool) -> Self {
+        let mut state = [
+            0x6a09e667u32,
+            0xbb67ae85,
+            0x3c6ef372,
+            0xa54ff53a,
+            0x510e527f,
+            0x9b05688c,
+            0x1f83d9ab,
+            0x5be0cd19,
+        ];
+
+        let num_chunks = (bytes.len() + 9 + 63) / 64;
+        let mut chunk = 0;
+        #[allow(clippy::precedence)]
+        while chunk < num_chunks {
+            if !finalize && chunk + 1 == num_chunks {
+                break;
+            }
+            let mut w = if chunk * 64 + 64 <= bytes.len() {
+                Self::copy_w(bytes, chunk * 64)
+            } else {
+                let mut buf = [0; 64];
+                let mut i = 0;
+                let offset = chunk * 64;
+                while offset + i < bytes.len() {
+                    buf[i] = bytes[offset + i];
+                    i += 1;
+                }
+                if (bytes.len() % 64 <= 64 - 9) || (chunk + 2 == num_chunks) {
+                    buf[i] = 0x80;
+                }
+                #[allow(clippy::identity_op)] // more readble
+                #[allow(clippy::erasing_op)]
+                if chunk + 1 == num_chunks {
+                    let bit_len = bytes.len() as u64 * 8;
+                    buf[64 - 8] = ((bit_len >> 8 * 7) & 0xFF) as u8;
+                    buf[64 - 7] = ((bit_len >> 8 * 6) & 0xFF) as u8;
+                    buf[64 - 6] = ((bit_len >> 8 * 5) & 0xFF) as u8;
+                    buf[64 - 5] = ((bit_len >> 8 * 4) & 0xFF) as u8;
+                    buf[64 - 4] = ((bit_len >> 8 * 3) & 0xFF) as u8;
+                    buf[64 - 3] = ((bit_len >> 8 * 2) & 0xFF) as u8;
+                    buf[64 - 2] = ((bit_len >> 8 * 1) & 0xFF) as u8;
+                    buf[64 - 1] = ((bit_len >> 8 * 0) & 0xFF) as u8;
+                }
+                Self::copy_w(&buf, 0)
+            };
+            chunk += 1;
+
+            let mut a = state[0];
+            let mut b = state[1];
+            let mut c = state[2];
+            let mut d = state[3];
+            let mut e = state[4];
+            let mut f = state[5];
+            let mut g = state[6];
+            let mut h = state[7];
+
+            round!(a, b, c, d, e, f, g, h, 0x428a2f98, w[0]);
+            round!(h, a, b, c, d, e, f, g, 0x71374491, w[1]);
+            round!(g, h, a, b, c, d, e, f, 0xb5c0fbcf, w[2]);
+            round!(f, g, h, a, b, c, d, e, 0xe9b5dba5, w[3]);
+            round!(e, f, g, h, a, b, c, d, 0x3956c25b, w[4]);
+            round!(d, e, f, g, h, a, b, c, 0x59f111f1, w[5]);
+            round!(c, d, e, f, g, h, a, b, 0x923f82a4, w[6]);
+            round!(b, c, d, e, f, g, h, a, 0xab1c5ed5, w[7]);
+            round!(a, b, c, d, e, f, g, h, 0xd807aa98, w[8]);
+            round!(h, a, b, c, d, e, f, g, 0x12835b01, w[9]);
+            round!(g, h, a, b, c, d, e, f, 0x243185be, w[10]);
+            round!(f, g, h, a, b, c, d, e, 0x550c7dc3, w[11]);
+            round!(e, f, g, h, a, b, c, d, 0x72be5d74, w[12]);
+            round!(d, e, f, g, h, a, b, c, 0x80deb1fe, w[13]);
+            round!(c, d, e, f, g, h, a, b, 0x9bdc06a7, w[14]);
+            round!(b, c, d, e, f, g, h, a, 0xc19bf174, w[15]);
+
+            round!(a, b, c, d, e, f, g, h, 0xe49b69c1, w[0], w[14], w[9], w[1]);
+            round!(h, a, b, c, d, e, f, g, 0xefbe4786, w[1], w[15], w[10], w[2]);
+            round!(g, h, a, b, c, d, e, f, 0x0fc19dc6, w[2], w[0], w[11], w[3]);
+            round!(f, g, h, a, b, c, d, e, 0x240ca1cc, w[3], w[1], w[12], w[4]);
+            round!(e, f, g, h, a, b, c, d, 0x2de92c6f, w[4], w[2], w[13], w[5]);
+            round!(d, e, f, g, h, a, b, c, 0x4a7484aa, w[5], w[3], w[14], w[6]);
+            round!(c, d, e, f, g, h, a, b, 0x5cb0a9dc, w[6], w[4], w[15], w[7]);
+            round!(b, c, d, e, f, g, h, a, 0x76f988da, w[7], w[5], w[0], w[8]);
+            round!(a, b, c, d, e, f, g, h, 0x983e5152, w[8], w[6], w[1], w[9]);
+            round!(h, a, b, c, d, e, f, g, 0xa831c66d, w[9], w[7], w[2], w[10]);
+            round!(g, h, a, b, c, d, e, f, 0xb00327c8, w[10], w[8], w[3], w[11]);
+            round!(f, g, h, a, b, c, d, e, 0xbf597fc7, w[11], w[9], w[4], w[12]);
+            round!(e, f, g, h, a, b, c, d, 0xc6e00bf3, w[12], w[10], w[5], w[13]);
+            round!(d, e, f, g, h, a, b, c, 0xd5a79147, w[13], w[11], w[6], w[14]);
+            round!(c, d, e, f, g, h, a, b, 0x06ca6351, w[14], w[12], w[7], w[15]);
+            round!(b, c, d, e, f, g, h, a, 0x14292967, w[15], w[13], w[8], w[0]);
+
+            round!(a, b, c, d, e, f, g, h, 0x27b70a85, w[0], w[14], w[9], w[1]);
+            round!(h, a, b, c, d, e, f, g, 0x2e1b2138, w[1], w[15], w[10], w[2]);
+            round!(g, h, a, b, c, d, e, f, 0x4d2c6dfc, w[2], w[0], w[11], w[3]);
+            round!(f, g, h, a, b, c, d, e, 0x53380d13, w[3], w[1], w[12], w[4]);
+            round!(e, f, g, h, a, b, c, d, 0x650a7354, w[4], w[2], w[13], w[5]);
+            round!(d, e, f, g, h, a, b, c, 0x766a0abb, w[5], w[3], w[14], w[6]);
+            round!(c, d, e, f, g, h, a, b, 0x81c2c92e, w[6], w[4], w[15], w[7]);
+            round!(b, c, d, e, f, g, h, a, 0x92722c85, w[7], w[5], w[0], w[8]);
+            round!(a, b, c, d, e, f, g, h, 0xa2bfe8a1, w[8], w[6], w[1], w[9]);
+            round!(h, a, b, c, d, e, f, g, 0xa81a664b, w[9], w[7], w[2], w[10]);
+            round!(g, h, a, b, c, d, e, f, 0xc24b8b70, w[10], w[8], w[3], w[11]);
+            round!(f, g, h, a, b, c, d, e, 0xc76c51a3, w[11], w[9], w[4], w[12]);
+            round!(e, f, g, h, a, b, c, d, 0xd192e819, w[12], w[10], w[5], w[13]);
+            round!(d, e, f, g, h, a, b, c, 0xd6990624, w[13], w[11], w[6], w[14]);
+            round!(c, d, e, f, g, h, a, b, 0xf40e3585, w[14], w[12], w[7], w[15]);
+            round!(b, c, d, e, f, g, h, a, 0x106aa070, w[15], w[13], w[8], w[0]);
+
+            round!(a, b, c, d, e, f, g, h, 0x19a4c116, w[0], w[14], w[9], w[1]);
+            round!(h, a, b, c, d, e, f, g, 0x1e376c08, w[1], w[15], w[10], w[2]);
+            round!(g, h, a, b, c, d, e, f, 0x2748774c, w[2], w[0], w[11], w[3]);
+            round!(f, g, h, a, b, c, d, e, 0x34b0bcb5, w[3], w[1], w[12], w[4]);
+            round!(e, f, g, h, a, b, c, d, 0x391c0cb3, w[4], w[2], w[13], w[5]);
+            round!(d, e, f, g, h, a, b, c, 0x4ed8aa4a, w[5], w[3], w[14], w[6]);
+            round!(c, d, e, f, g, h, a, b, 0x5b9cca4f, w[6], w[4], w[15], w[7]);
+            round!(b, c, d, e, f, g, h, a, 0x682e6ff3, w[7], w[5], w[0], w[8]);
+            round!(a, b, c, d, e, f, g, h, 0x748f82ee, w[8], w[6], w[1], w[9]);
+            round!(h, a, b, c, d, e, f, g, 0x78a5636f, w[9], w[7], w[2], w[10]);
+            round!(g, h, a, b, c, d, e, f, 0x84c87814, w[10], w[8], w[3], w[11]);
+            round!(f, g, h, a, b, c, d, e, 0x8cc70208, w[11], w[9], w[4], w[12]);
+            round!(e, f, g, h, a, b, c, d, 0x90befffa, w[12], w[10], w[5], w[13]);
+            round!(d, e, f, g, h, a, b, c, 0xa4506ceb, w[13], w[11], w[6], w[14]);
+            round!(c, d, e, f, g, h, a, b, 0xbef9a3f7, w[14], w[12], w[7], w[15]);
+            round!(b, c, d, e, f, g, h, a, 0xc67178f2, w[15], w[13], w[8], w[0]);
+
+            state[0] = state[0].wrapping_add(a);
+            state[1] = state[1].wrapping_add(b);
+            state[2] = state[2].wrapping_add(c);
+            state[3] = state[3].wrapping_add(d);
+            state[4] = state[4].wrapping_add(e);
+            state[5] = state[5].wrapping_add(f);
+            state[6] = state[6].wrapping_add(g);
+            state[7] = state[7].wrapping_add(h);
+        }
+        let mut output = [0u8; 32];
+        let mut i = 0;
+        #[allow(clippy::identity_op)] // more readble
+        while i < 8 {
+            output[i * 4 + 0] = (state[i + 0] >> 24) as u8;
+            output[i * 4 + 1] = (state[i + 0] >> 16) as u8;
+            output[i * 4 + 2] = (state[i + 0] >> 8) as u8;
+            output[i * 4 + 3] = (state[i + 0] >> 0) as u8;
+            i += 1;
+        }
+        Midstate(output)
+    }
+}
+
+impl HashEngine {
+    /// Create a new [`HashEngine`] from a [`Midstate`].
+    ///
+    /// # Panics
+    ///
+    /// If `length` is not a multiple of the block size.
+    pub fn from_midstate(midstate: Midstate, length: usize) -> HashEngine {
+        assert!(length % BLOCK_SIZE == 0, "length is no multiple of the block size");
+
+        let mut ret = [0; 8];
+        for (ret_val, midstate_bytes) in ret.iter_mut().zip(midstate[..].chunks_exact(4)) {
+            *ret_val = u32::from_be_bytes(midstate_bytes.try_into().expect("4 byte slice"));
+        }
+
+        HashEngine { buffer: [0; BLOCK_SIZE], h: ret, length }
+    }
+
+    // Algorithm copied from libsecp256k1
+    fn process_block(&mut self) {
+        debug_assert_eq!(self.buffer.len(), BLOCK_SIZE);
+
+        let mut w = [0u32; 16];
+        for (w_val, buff_bytes) in w.iter_mut().zip(self.buffer.chunks_exact(4)) {
+            *w_val = u32::from_be_bytes(buff_bytes.try_into().expect("4 byte slice"));
+        }
+
+        let mut a = self.h[0];
+        let mut b = self.h[1];
+        let mut c = self.h[2];
+        let mut d = self.h[3];
+        let mut e = self.h[4];
+        let mut f = self.h[5];
+        let mut g = self.h[6];
+        let mut h = self.h[7];
+
+        round!(a, b, c, d, e, f, g, h, 0x428a2f98, w[0]);
+        round!(h, a, b, c, d, e, f, g, 0x71374491, w[1]);
+        round!(g, h, a, b, c, d, e, f, 0xb5c0fbcf, w[2]);
+        round!(f, g, h, a, b, c, d, e, 0xe9b5dba5, w[3]);
+        round!(e, f, g, h, a, b, c, d, 0x3956c25b, w[4]);
+        round!(d, e, f, g, h, a, b, c, 0x59f111f1, w[5]);
+        round!(c, d, e, f, g, h, a, b, 0x923f82a4, w[6]);
+        round!(b, c, d, e, f, g, h, a, 0xab1c5ed5, w[7]);
+        round!(a, b, c, d, e, f, g, h, 0xd807aa98, w[8]);
+        round!(h, a, b, c, d, e, f, g, 0x12835b01, w[9]);
+        round!(g, h, a, b, c, d, e, f, 0x243185be, w[10]);
+        round!(f, g, h, a, b, c, d, e, 0x550c7dc3, w[11]);
+        round!(e, f, g, h, a, b, c, d, 0x72be5d74, w[12]);
+        round!(d, e, f, g, h, a, b, c, 0x80deb1fe, w[13]);
+        round!(c, d, e, f, g, h, a, b, 0x9bdc06a7, w[14]);
+        round!(b, c, d, e, f, g, h, a, 0xc19bf174, w[15]);
+
+        round!(a, b, c, d, e, f, g, h, 0xe49b69c1, w[0], w[14], w[9], w[1]);
+        round!(h, a, b, c, d, e, f, g, 0xefbe4786, w[1], w[15], w[10], w[2]);
+        round!(g, h, a, b, c, d, e, f, 0x0fc19dc6, w[2], w[0], w[11], w[3]);
+        round!(f, g, h, a, b, c, d, e, 0x240ca1cc, w[3], w[1], w[12], w[4]);
+        round!(e, f, g, h, a, b, c, d, 0x2de92c6f, w[4], w[2], w[13], w[5]);
+        round!(d, e, f, g, h, a, b, c, 0x4a7484aa, w[5], w[3], w[14], w[6]);
+        round!(c, d, e, f, g, h, a, b, 0x5cb0a9dc, w[6], w[4], w[15], w[7]);
+        round!(b, c, d, e, f, g, h, a, 0x76f988da, w[7], w[5], w[0], w[8]);
+        round!(a, b, c, d, e, f, g, h, 0x983e5152, w[8], w[6], w[1], w[9]);
+        round!(h, a, b, c, d, e, f, g, 0xa831c66d, w[9], w[7], w[2], w[10]);
+        round!(g, h, a, b, c, d, e, f, 0xb00327c8, w[10], w[8], w[3], w[11]);
+        round!(f, g, h, a, b, c, d, e, 0xbf597fc7, w[11], w[9], w[4], w[12]);
+        round!(e, f, g, h, a, b, c, d, 0xc6e00bf3, w[12], w[10], w[5], w[13]);
+        round!(d, e, f, g, h, a, b, c, 0xd5a79147, w[13], w[11], w[6], w[14]);
+        round!(c, d, e, f, g, h, a, b, 0x06ca6351, w[14], w[12], w[7], w[15]);
+        round!(b, c, d, e, f, g, h, a, 0x14292967, w[15], w[13], w[8], w[0]);
+
+        round!(a, b, c, d, e, f, g, h, 0x27b70a85, w[0], w[14], w[9], w[1]);
+        round!(h, a, b, c, d, e, f, g, 0x2e1b2138, w[1], w[15], w[10], w[2]);
+        round!(g, h, a, b, c, d, e, f, 0x4d2c6dfc, w[2], w[0], w[11], w[3]);
+        round!(f, g, h, a, b, c, d, e, 0x53380d13, w[3], w[1], w[12], w[4]);
+        round!(e, f, g, h, a, b, c, d, 0x650a7354, w[4], w[2], w[13], w[5]);
+        round!(d, e, f, g, h, a, b, c, 0x766a0abb, w[5], w[3], w[14], w[6]);
+        round!(c, d, e, f, g, h, a, b, 0x81c2c92e, w[6], w[4], w[15], w[7]);
+        round!(b, c, d, e, f, g, h, a, 0x92722c85, w[7], w[5], w[0], w[8]);
+        round!(a, b, c, d, e, f, g, h, 0xa2bfe8a1, w[8], w[6], w[1], w[9]);
+        round!(h, a, b, c, d, e, f, g, 0xa81a664b, w[9], w[7], w[2], w[10]);
+        round!(g, h, a, b, c, d, e, f, 0xc24b8b70, w[10], w[8], w[3], w[11]);
+        round!(f, g, h, a, b, c, d, e, 0xc76c51a3, w[11], w[9], w[4], w[12]);
+        round!(e, f, g, h, a, b, c, d, 0xd192e819, w[12], w[10], w[5], w[13]);
+        round!(d, e, f, g, h, a, b, c, 0xd6990624, w[13], w[11], w[6], w[14]);
+        round!(c, d, e, f, g, h, a, b, 0xf40e3585, w[14], w[12], w[7], w[15]);
+        round!(b, c, d, e, f, g, h, a, 0x106aa070, w[15], w[13], w[8], w[0]);
+
+        round!(a, b, c, d, e, f, g, h, 0x19a4c116, w[0], w[14], w[9], w[1]);
+        round!(h, a, b, c, d, e, f, g, 0x1e376c08, w[1], w[15], w[10], w[2]);
+        round!(g, h, a, b, c, d, e, f, 0x2748774c, w[2], w[0], w[11], w[3]);
+        round!(f, g, h, a, b, c, d, e, 0x34b0bcb5, w[3], w[1], w[12], w[4]);
+        round!(e, f, g, h, a, b, c, d, 0x391c0cb3, w[4], w[2], w[13], w[5]);
+        round!(d, e, f, g, h, a, b, c, 0x4ed8aa4a, w[5], w[3], w[14], w[6]);
+        round!(c, d, e, f, g, h, a, b, 0x5b9cca4f, w[6], w[4], w[15], w[7]);
+        round!(b, c, d, e, f, g, h, a, 0x682e6ff3, w[7], w[5], w[0], w[8]);
+        round!(a, b, c, d, e, f, g, h, 0x748f82ee, w[8], w[6], w[1], w[9]);
+        round!(h, a, b, c, d, e, f, g, 0x78a5636f, w[9], w[7], w[2], w[10]);
+        round!(g, h, a, b, c, d, e, f, 0x84c87814, w[10], w[8], w[3], w[11]);
+        round!(f, g, h, a, b, c, d, e, 0x8cc70208, w[11], w[9], w[4], w[12]);
+        round!(e, f, g, h, a, b, c, d, 0x90befffa, w[12], w[10], w[5], w[13]);
+        round!(d, e, f, g, h, a, b, c, 0xa4506ceb, w[13], w[11], w[6], w[14]);
+        round!(c, d, e, f, g, h, a, b, 0xbef9a3f7, w[14], w[12], w[7], w[15]);
+        round!(b, c, d, e, f, g, h, a, 0xc67178f2, w[15], w[13], w[8], w[0]);
+
+        self.h[0] = self.h[0].wrapping_add(a);
+        self.h[1] = self.h[1].wrapping_add(b);
+        self.h[2] = self.h[2].wrapping_add(c);
+        self.h[3] = self.h[3].wrapping_add(d);
+        self.h[4] = self.h[4].wrapping_add(e);
+        self.h[5] = self.h[5].wrapping_add(f);
+        self.h[6] = self.h[6].wrapping_add(g);
+        self.h[7] = self.h[7].wrapping_add(h);
+    }
+}
+
+impl secp256k1::ThirtyTwoByteHash for Hash {
+    fn into_32(self) -> [u8; 32] { self.0 }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::{sha256, Hash, HashEngine};
+
+    #[test]
+    #[cfg(feature = "alloc")]
+    fn test() {
+        #[derive(Clone)]
+        struct Test {
+            input: &'static str,
+            output: Vec<u8>,
+            output_str: &'static str,
+        }
+
+        #[rustfmt::skip]
+        let tests = vec![
+            // Examples from wikipedia
+            Test {
+                input: "",
+                output: vec![
+                    0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
+                    0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
+                    0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
+                    0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55,
+                ],
+                output_str: "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
+            },
+            Test {
+                input: "The quick brown fox jumps over the lazy dog",
+                output: vec![
+                    0xd7, 0xa8, 0xfb, 0xb3, 0x07, 0xd7, 0x80, 0x94,
+                    0x69, 0xca, 0x9a, 0xbc, 0xb0, 0x08, 0x2e, 0x4f,
+                    0x8d, 0x56, 0x51, 0xe4, 0x6d, 0x3c, 0xdb, 0x76,
+                    0x2d, 0x02, 0xd0, 0xbf, 0x37, 0xc9, 0xe5, 0x92,
+                ],
+                output_str: "d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592",
+            },
+            Test {
+                input: "The quick brown fox jumps over the lazy dog.",
+                output: vec![
+                    0xef, 0x53, 0x7f, 0x25, 0xc8, 0x95, 0xbf, 0xa7,
+                    0x82, 0x52, 0x65, 0x29, 0xa9, 0xb6, 0x3d, 0x97,
+                    0xaa, 0x63, 0x15, 0x64, 0xd5, 0xd7, 0x89, 0xc2,
+                    0xb7, 0x65, 0x44, 0x8c, 0x86, 0x35, 0xfb, 0x6c,
+                ],
+                output_str: "ef537f25c895bfa782526529a9b63d97aa631564d5d789c2b765448c8635fb6c",
+            },
+        ];
+
+        for test in tests {
+            // Hash through high-level API, check hex encoding/decoding
+            let hash = sha256::Hash::hash(test.input.as_bytes());
+            assert_eq!(hash, test.output_str.parse::<sha256::Hash>().expect("parse hex"));
+            assert_eq!(&hash[..], &test.output[..]);
+            assert_eq!(&hash.to_string(), &test.output_str);
+
+            // Hash through engine, checking that we can input byte by byte
+            let mut engine = sha256::Hash::engine();
+            for ch in test.input.as_bytes() {
+                engine.input(&[*ch]);
+            }
+            let manual_hash = sha256::Hash::from_engine(engine);
+            assert_eq!(hash, manual_hash);
+            assert_eq!(hash.to_byte_array()[..].as_ref(), test.output.as_slice());
+        }
+    }
+
+    #[test]
+    #[rustfmt::skip]
+    fn midstate() {
+        // Test vector obtained by doing an asset issuance on Elements
+        let mut engine = sha256::Hash::engine();
+        // sha256dhash of outpoint
+        // 73828cbc65fd68ab78dc86992b76ae50ae2bf8ceedbe8de0483172f0886219f7:0
+        engine.input(&[
+            0x9d, 0xd0, 0x1b, 0x56, 0xb1, 0x56, 0x45, 0x14,
+            0x3e, 0xad, 0x15, 0x8d, 0xec, 0x19, 0xf8, 0xce,
+            0xa9, 0x0b, 0xd0, 0xa9, 0xb2, 0xf8, 0x1d, 0x21,
+            0xff, 0xa3, 0xa4, 0xc6, 0x44, 0x81, 0xd4, 0x1c,
+        ]);
+        // 32 bytes of zeroes representing "new asset"
+        engine.input(&[0; 32]);
+        assert_eq!(
+            engine.midstate(),
+            // RPC output
+            sha256::Midstate::from_byte_array([
+                0x0b, 0xcf, 0xe0, 0xe5, 0x4e, 0x6c, 0xc7, 0xd3,
+                0x4f, 0x4f, 0x7c, 0x1d, 0xf0, 0xb0, 0xf5, 0x03,
+                0xf2, 0xf7, 0x12, 0x91, 0x2a, 0x06, 0x05, 0xb4,
+                0x14, 0xed, 0x33, 0x7f, 0x7f, 0x03, 0x2e, 0x03,
+            ])
+        );
+    }
+
+    #[test]
+    fn engine_with_state() {
+        let mut engine = sha256::Hash::engine();
+        let midstate_engine = sha256::HashEngine::from_midstate(engine.midstate(), 0);
+        // Fresh engine and engine initialized with fresh state should have same state
+        assert_eq!(engine.h, midstate_engine.h);
+
+        // Midstate changes after writing 64 bytes
+        engine.input(&[1; 63]);
+        assert_eq!(engine.h, midstate_engine.h);
+        engine.input(&[2; 1]);
+        assert_ne!(engine.h, midstate_engine.h);
+
+        // Initializing an engine with midstate from another engine should result in
+        // both engines producing the same hashes
+        let data_vec = vec![vec![3; 1], vec![4; 63], vec![5; 65], vec![6; 66]];
+        for data in data_vec {
+            let mut engine = engine.clone();
+            let mut midstate_engine =
+                sha256::HashEngine::from_midstate(engine.midstate(), engine.length);
+            assert_eq!(engine.h, midstate_engine.h);
+            assert_eq!(engine.length, midstate_engine.length);
+            engine.input(&data);
+            midstate_engine.input(&data);
+            assert_eq!(engine.h, midstate_engine.h);
+            let hash1 = sha256::Hash::from_engine(engine);
+            let hash2 = sha256::Hash::from_engine(midstate_engine);
+            assert_eq!(hash1, hash2);
+        }
+
+        // Test that a specific midstate results in a specific hash. Midstate was
+        // obtained by applying sha256 to sha256("MuSig coefficient")||sha256("MuSig
+        // coefficient").
+        #[rustfmt::skip]
+        static MIDSTATE: [u8; 32] = [
+            0x0f, 0xd0, 0x69, 0x0c, 0xfe, 0xfe, 0xae, 0x97,
+            0x99, 0x6e, 0xac, 0x7f, 0x5c, 0x30, 0xd8, 0x64,
+            0x8c, 0x4a, 0x05, 0x73, 0xac, 0xa1, 0xa2, 0x2f,
+            0x6f, 0x43, 0xb8, 0x01, 0x85, 0xce, 0x27, 0xcd,
+        ];
+        #[rustfmt::skip]
+        static HASH_EXPECTED: [u8; 32] = [
+            0x18, 0x84, 0xe4, 0x72, 0x40, 0x4e, 0xf4, 0x5a,
+            0xb4, 0x9c, 0x4e, 0xa4, 0x9a, 0xe6, 0x23, 0xa8,
+            0x88, 0x52, 0x7f, 0x7d, 0x8a, 0x06, 0x94, 0x20,
+            0x8f, 0xf1, 0xf7, 0xa9, 0xd5, 0x69, 0x09, 0x59,
+        ];
+        let midstate_engine =
+            sha256::HashEngine::from_midstate(sha256::Midstate::from_byte_array(MIDSTATE), 64);
+        let hash = sha256::Hash::from_engine(midstate_engine);
+        assert_eq!(hash, sha256::Hash(HASH_EXPECTED));
+    }
+
+    #[test]
+    fn const_hash() {
+        assert_eq!(super::Hash::hash(&[]), super::Hash::const_hash(&[]));
+
+        let mut bytes = Vec::new();
+        for i in 0..256 {
+            bytes.push(i as u8);
+            assert_eq!(
+                super::Hash::hash(&bytes),
+                super::Hash::const_hash(&bytes),
+                "hashes don't match for length {}",
+                i + 1
+            );
+        }
+    }
+
+    #[test]
+    fn const_midstate() {
+        use super::Midstate;
+
+        assert_eq!(
+            Midstate::hash_tag(b"TapLeaf"),
+            Midstate([
+                156, 224, 228, 230, 124, 17, 108, 57, 56, 179, 202, 242, 195, 15, 80, 137, 211,
+                243, 147, 108, 71, 99, 110, 96, 125, 179, 62, 234, 221, 198, 240, 201,
+            ])
+        )
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn sha256_serde() {
+        use serde_test::{assert_tokens, Configure, Token};
+
+        #[rustfmt::skip]
+        static HASH_BYTES: [u8; 32] = [
+            0xef, 0x53, 0x7f, 0x25, 0xc8, 0x95, 0xbf, 0xa7,
+            0x82, 0x52, 0x65, 0x29, 0xa9, 0xb6, 0x3d, 0x97,
+            0xaa, 0x63, 0x15, 0x64, 0xd5, 0xd7, 0x89, 0xc2,
+            0xb7, 0x65, 0x44, 0x8c, 0x86, 0x35, 0xfb, 0x6c,
+        ];
+
+        let hash = sha256::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        assert_tokens(&hash.compact(), &[Token::BorrowedBytes(&HASH_BYTES[..])]);
+        assert_tokens(
+            &hash.readable(),
+            &[Token::Str("ef537f25c895bfa782526529a9b63d97aa631564d5d789c2b765448c8635fb6c")],
+        );
+    }
+
+    #[cfg(target_arch = "wasm32")]
+    mod wasm_tests {
+        extern crate wasm_bindgen_test;
+        use self::wasm_bindgen_test::*;
+        use super::*;
+        #[wasm_bindgen_test]
+        fn sha256_tests() {
+            test();
+            midstate();
+            engine_with_state();
+        }
+    }
+}
+
+#[cfg(bench)]
+mod benches {
+    use test::Bencher;
+
+    use crate::{sha256, Hash, HashEngine};
+
+    #[bench]
+    pub fn sha256_10(bh: &mut Bencher) {
+        let mut engine = sha256::Hash::engine();
+        let bytes = [1u8; 10];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn sha256_1k(bh: &mut Bencher) {
+        let mut engine = sha256::Hash::engine();
+        let bytes = [1u8; 1024];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn sha256_64k(bh: &mut Bencher) {
+        let mut engine = sha256::Hash::engine();
+        let bytes = [1u8; 65536];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+}
diff --git a/hashes/src/sha256d.rs b/hashes/src/sha256d.rs
new file mode 100644
index 000000000..445d6f611
--- /dev/null
+++ b/hashes/src/sha256d.rs
@@ -0,0 +1,160 @@
+// Bitcoin Hashes Library
+// Written in 2018 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! SHA256d implementation (double SHA256).
+//!
+
+use core::ops::Index;
+use core::slice::SliceIndex;
+use core::str;
+
+use crate::{sha256, Error};
+
+crate::internal_macros::hash_type! {
+    256,
+    true,
+    "Output of the SHA256d hash function.",
+    "crate::util::json_hex_string::len_32"
+}
+
+type HashEngine = sha256::HashEngine;
+
+fn from_engine(e: sha256::HashEngine) -> Hash {
+    use crate::Hash as _;
+
+    let sha2 = sha256::Hash::from_engine(e);
+    let sha2d = sha256::Hash::hash(&sha2[..]);
+
+    let mut ret = [0; 32];
+    ret.copy_from_slice(&sha2d[..]);
+    Hash(ret)
+}
+
+impl secp256k1::ThirtyTwoByteHash for Hash {
+    fn into_32(self) -> [u8; 32] { self.0 }
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    #[cfg(feature = "alloc")]
+    fn test() {
+        use crate::{sha256, sha256d, Hash, HashEngine};
+
+        #[derive(Clone)]
+        struct Test {
+            input: &'static str,
+            output: Vec<u8>,
+            output_str: &'static str,
+        }
+
+        #[rustfmt::skip]
+        let tests = vec![
+            // Test vector copied out of rust-dash
+            Test {
+                input: "",
+                output: vec![
+                    0x5d, 0xf6, 0xe0, 0xe2, 0x76, 0x13, 0x59, 0xd3,
+                    0x0a, 0x82, 0x75, 0x05, 0x8e, 0x29, 0x9f, 0xcc,
+                    0x03, 0x81, 0x53, 0x45, 0x45, 0xf5, 0x5c, 0xf4,
+                    0x3e, 0x41, 0x98, 0x3f, 0x5d, 0x4c, 0x94, 0x56,
+                ],
+                output_str: "56944c5d3f98413ef45cf54545538103cc9f298e0575820ad3591376e2e0f65d",
+            },
+        ];
+
+        for test in tests {
+            // Hash through high-level API, check hex encoding/decoding
+            let hash = sha256d::Hash::hash(test.input.as_bytes());
+            assert_eq!(hash, test.output_str.parse::<sha256d::Hash>().expect("parse hex"));
+            assert_eq!(&hash[..], &test.output[..]);
+            assert_eq!(&hash.to_string(), &test.output_str);
+
+            // Hash through engine, checking that we can input byte by byte
+            let mut engine = sha256d::Hash::engine();
+            for ch in test.input.as_bytes() {
+                engine.input(&[*ch]);
+            }
+            let manual_hash = sha256d::Hash::from_engine(engine);
+            assert_eq!(hash, manual_hash);
+
+            // Hash by computing a sha256 then `hash_again`ing it
+            let sha2_hash = sha256::Hash::hash(test.input.as_bytes());
+            let sha2d_hash = sha2_hash.hash_again();
+            assert_eq!(hash, sha2d_hash);
+
+            assert_eq!(hash.to_byte_array()[..].as_ref(), test.output.as_slice());
+        }
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn sha256_serde() {
+        use serde_test::{assert_tokens, Configure, Token};
+
+        use crate::{sha256d, Hash};
+
+        #[rustfmt::skip]
+        static HASH_BYTES: [u8; 32] = [
+            0xef, 0x53, 0x7f, 0x25, 0xc8, 0x95, 0xbf, 0xa7,
+            0x82, 0x52, 0x65, 0x29, 0xa9, 0xb6, 0x3d, 0x97,
+            0xaa, 0x63, 0x15, 0x64, 0xd5, 0xd7, 0x89, 0xc2,
+            0xb7, 0x65, 0x44, 0x8c, 0x86, 0x35, 0xfb, 0x6c,
+        ];
+
+        let hash = sha256d::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        assert_tokens(&hash.compact(), &[Token::BorrowedBytes(&HASH_BYTES[..])]);
+        assert_tokens(
+            &hash.readable(),
+            &[Token::Str("6cfb35868c4465b7c289d7d5641563aa973db6a929655282a7bf95c8257f53ef")],
+        );
+    }
+}
+
+#[cfg(bench)]
+mod benches {
+    use test::Bencher;
+
+    use crate::{sha256d, Hash, HashEngine};
+
+    #[bench]
+    pub fn sha256d_10(bh: &mut Bencher) {
+        let mut engine = sha256d::Hash::engine();
+        let bytes = [1u8; 10];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn sha256d_1k(bh: &mut Bencher) {
+        let mut engine = sha256d::Hash::engine();
+        let bytes = [1u8; 1024];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn sha256d_64k(bh: &mut Bencher) {
+        let mut engine = sha256d::Hash::engine();
+        let bytes = [1u8; 65536];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+}
diff --git a/hashes/src/sha256t.rs b/hashes/src/sha256t.rs
new file mode 100644
index 000000000..437b8e98b
--- /dev/null
+++ b/hashes/src/sha256t.rs
@@ -0,0 +1,219 @@
+// Bitcoin Hashes Library
+// Written in 2019 by
+//   The rust-dash developers.
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+//! SHA256t implementation (tagged SHA256).
+//!
+
+use core::marker::PhantomData;
+use core::ops::Index;
+use core::slice::SliceIndex;
+use core::{cmp, str};
+
+use crate::{sha256, Error};
+
+type HashEngine = sha256::HashEngine;
+
+/// Trait representing a tag that can be used as a context for SHA256t hashes.
+pub trait Tag {
+    /// Returns a hash engine that is pre-tagged and is ready to be used for the data.
+    fn engine() -> sha256::HashEngine;
+}
+
+/// Output of the SHA256t hash function.
+#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
+#[repr(transparent)]
+pub struct Hash<T: Tag>(
+    #[cfg_attr(
+        feature = "schemars",
+        schemars(schema_with = "crate::util::json_hex_string::len_32")
+    )]
+    [u8; 32],
+    #[cfg_attr(feature = "schemars", schemars(skip))] PhantomData<T>,
+);
+
+impl<T: Tag> Hash<T> {
+    fn internal_new(arr: [u8; 32]) -> Self { Hash(arr, Default::default()) }
+
+    fn internal_engine() -> HashEngine { T::engine() }
+}
+
+impl<T: Tag> Copy for Hash<T> {}
+impl<T: Tag> Clone for Hash<T> {
+    fn clone(&self) -> Self { Hash(self.0, self.1) }
+}
+impl<T: Tag> PartialEq for Hash<T> {
+    fn eq(&self, other: &Hash<T>) -> bool { self.0 == other.0 }
+}
+impl<T: Tag> Eq for Hash<T> {}
+impl<T: Tag> Default for Hash<T> {
+    fn default() -> Self { Hash([0; 32], PhantomData) }
+}
+impl<T: Tag> PartialOrd for Hash<T> {
+    fn partial_cmp(&self, other: &Hash<T>) -> Option<cmp::Ordering> {
+        Some(cmp::Ord::cmp(self, other))
+    }
+}
+impl<T: Tag> Ord for Hash<T> {
+    fn cmp(&self, other: &Hash<T>) -> cmp::Ordering { cmp::Ord::cmp(&self.0, &other.0) }
+}
+impl<T: Tag> core::hash::Hash for Hash<T> {
+    fn hash<H: core::hash::Hasher>(&self, h: &mut H) { self.0.hash(h) }
+}
+
+crate::internal_macros::hash_trait_impls!(256, true, T: Tag);
+
+fn from_engine<T: Tag>(e: sha256::HashEngine) -> Hash<T> {
+    use crate::Hash as _;
+
+    Hash::from_byte_array(sha256::Hash::from_engine(e).to_byte_array())
+}
+
+/// Macro used to define a newtype tagged hash.
+///
+/// This macro creates two types:
+///
+/// * a tag struct
+/// * a hash wrapper
+///
+/// The syntax is:
+///
+/// ```
+/// # use dashcore_hashes::sha256t_hash_newtype;
+/// sha256t_hash_newtype! {
+///     /// Optional documentation details here.
+///     /// Summary is always generated.
+///     pub struct FooTag = hash_str("foo");
+///
+///     /// A foo hash.
+///     // Direction works just like in case of hash_newtype! macro.
+///     #[hash_newtype(forward)]
+///     pub struct FooHash(_);
+/// }
+/// ```
+///
+/// The structs must be defined in this order - tag first, then hash type. `hash_str` marker
+/// says the midstate should be generated by hashing the supplied string in a way described in
+/// BIP-341. Alternatively, you can supply `hash_bytes` to hash raw bytes. If you have the midstate
+/// already pre-computed and prefer **compiler** performance to readability you may use
+/// `raw(MIDSTATE_BYTES, HASHED_BYTES_LENGHT)` instead.
+///
+/// Both visibility modifiers and attributes are optional and passed to inner structs (excluding
+/// `#[hash_newtype(...)]`). The attributes suffer same compiler performance limitations as in
+/// [`hash_newtype`] macro.
+///
+/// The macro accepts multiple inputs so you can define multiple hash newtypes in one macro call.
+/// Just make sure to enter the structs in order `Tag0`, `Hash0`, `Tag1`, `Hash1`...
+///
+/// [`hash_newtype`]: crate::hash_newtype
+#[macro_export]
+macro_rules! sha256t_hash_newtype {
+    ($($(#[$($tag_attr:tt)*])* $tag_vis:vis struct $tag:ident = $constructor:tt($($tag_value:tt)+); $(#[$($hash_attr:tt)*])* $hash_vis:vis struct $hash_name:ident($(#[$($field_attr:tt)*])* _);)+) => {
+        $(
+        $crate::sha256t_hash_newtype_tag!($tag_vis, $tag, stringify!($hash_name), $(#[$($tag_attr)*])*);
+
+        impl $crate::sha256t::Tag for $tag {
+            #[inline]
+            fn engine() -> $crate::sha256::HashEngine {
+                const MIDSTATE: ($crate::sha256::Midstate, usize) = $crate::sha256t_hash_newtype_tag_constructor!($constructor, $($tag_value)+);
+                #[allow(unused)]
+                const _LENGTH_CHECK: () = [(); 1][MIDSTATE.1 % 64];
+                $crate::sha256::HashEngine::from_midstate(MIDSTATE.0, MIDSTATE.1)
+            }
+        }
+
+        $crate::hash_newtype! {
+            $(#[$($hash_attr)*])*
+            $hash_vis struct $hash_name($(#[$($field_attr)*])* $crate::sha256t::Hash<$tag>);
+        }
+        )+
+    }
+}
+
+// Workaround macros being unavailable in attributes.
+#[doc(hidden)]
+#[macro_export]
+macro_rules! sha256t_hash_newtype_tag {
+    ($vis:vis, $tag:ident, $name:expr, $(#[$($attr:meta)*])*) => {
+        #[doc = "The tag used for [`"]
+        #[doc = $name]
+        #[doc = "`]\n\n"]
+        $(#[$($attr)*])*
+        #[derive(Copy, Clone, PartialEq, Eq, Default, PartialOrd, Ord, Hash)]
+        $vis struct $tag;
+    };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! sha256t_hash_newtype_tag_constructor {
+    (hash_str, $value:expr) => {
+        ($crate::sha256::Midstate::hash_tag($value.as_bytes()), 64)
+    };
+    (hash_bytes, $value:expr) => {
+        ($crate::sha256::Midstate::hash_tag($value), 64)
+    };
+    (raw, $bytes:expr, $len:expr) => {
+        ($crate::sha256::Midstate::from_byte_array($bytes), $len)
+    };
+}
+
+#[cfg(test)]
+mod tests {
+    #[cfg(feature = "alloc")]
+    use crate::Hash;
+    use crate::{sha256, sha256t};
+
+    const TEST_MIDSTATE: [u8; 32] = [
+        156, 224, 228, 230, 124, 17, 108, 57, 56, 179, 202, 242, 195, 15, 80, 137, 211, 243, 147,
+        108, 71, 99, 110, 96, 125, 179, 62, 234, 221, 198, 240, 201,
+    ];
+
+    #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Default, Hash)]
+    #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
+    pub struct TestHashTag;
+
+    impl sha256t::Tag for TestHashTag {
+        fn engine() -> sha256::HashEngine {
+            // The TapRoot TapLeaf midstate.
+            let midstate = sha256::Midstate::from_byte_array(TEST_MIDSTATE);
+            sha256::HashEngine::from_midstate(midstate, 64)
+        }
+    }
+
+    /// A hash tagged with `$name`.
+    #[cfg(feature = "alloc")]
+    pub type TestHash = sha256t::Hash<TestHashTag>;
+
+    sha256t_hash_newtype! {
+        /// Test detailed explanation.
+        struct NewTypeTag = raw(TEST_MIDSTATE, 64);
+
+        /// A test hash.
+        #[hash_newtype(backward)]
+        struct NewTypeHash(_);
+    }
+
+    #[test]
+    #[cfg(feature = "alloc")]
+    fn test_sha256t() {
+        assert_eq!(
+            TestHash::hash(&[0]).to_string(),
+            "29589d5122ec666ab5b4695070b6debc63881a4f85d88d93ddc90078038213ed"
+        );
+        assert_eq!(
+            NewTypeHash::hash(&[0]).to_string(),
+            "29589d5122ec666ab5b4695070b6debc63881a4f85d88d93ddc90078038213ed"
+        );
+    }
+}
diff --git a/hashes/src/sha512.rs b/hashes/src/sha512.rs
new file mode 100644
index 000000000..cb53c1131
--- /dev/null
+++ b/hashes/src/sha512.rs
@@ -0,0 +1,410 @@
+// Bitcoin Hashes Library
+// Written in 2018 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+// This module is largely copied from the rust-crypto ripemd.rs file;
+// while rust-crypto is licensed under Apache, that file specifically
+// was written entirely by Andrew Poelstra, who is re-licensing its
+// contents here as CC0.
+
+//! SHA512 implementation.
+//!
+
+use core::convert::TryInto;
+use core::ops::Index;
+use core::slice::SliceIndex;
+use core::{cmp, str};
+
+use crate::{Error, HashEngine as _};
+
+crate::internal_macros::hash_trait_impls!(512, false);
+
+pub(crate) const BLOCK_SIZE: usize = 128;
+
+/// Engine to compute SHA512 hash function.
+#[derive(Clone)]
+pub struct HashEngine {
+    pub(crate) h: [u64; 8],
+    pub(crate) length: usize,
+    pub(crate) buffer: [u8; BLOCK_SIZE],
+}
+
+impl Default for HashEngine {
+    #[rustfmt::skip]
+    fn default() -> Self {
+        HashEngine {
+            h: [
+                0x6a09e667f3bcc908, 0xbb67ae8584caa73b, 0x3c6ef372fe94f82b, 0xa54ff53a5f1d36f1,
+                0x510e527fade682d1, 0x9b05688c2b3e6c1f, 0x1f83d9abfb41bd6b, 0x5be0cd19137e2179,
+            ],
+            length: 0,
+            buffer: [0; BLOCK_SIZE],
+        }
+    }
+}
+
+impl crate::HashEngine for HashEngine {
+    type MidState = [u8; 64];
+
+    #[cfg(not(fuzzing))]
+    fn midstate(&self) -> [u8; 64] {
+        let mut ret = [0; 64];
+        for (val, ret_bytes) in self.h.iter().zip(ret.chunks_exact_mut(8)) {
+            ret_bytes.copy_from_slice(&val.to_be_bytes());
+        }
+        ret
+    }
+
+    #[cfg(fuzzing)]
+    fn midstate(&self) -> [u8; 64] {
+        let mut ret = [0; 64];
+        ret.copy_from_slice(&self.buffer[..64]);
+        ret
+    }
+
+    const BLOCK_SIZE: usize = 128;
+
+    fn n_bytes_hashed(&self) -> usize { self.length }
+
+    engine_input_impl!();
+}
+
+/// Output of the SHA512 hash function.
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
+#[repr(transparent)]
+pub struct Hash(
+    #[cfg_attr(
+        feature = "schemars",
+        schemars(schema_with = "crate::util::json_hex_string::len_64")
+    )]
+    [u8; 64],
+);
+
+impl Hash {
+    fn internal_new(arr: [u8; 64]) -> Self { Hash(arr) }
+
+    fn internal_engine() -> HashEngine { Default::default() }
+}
+
+#[cfg(not(fuzzing))]
+pub(crate) fn from_engine(mut e: HashEngine) -> Hash {
+    // pad buffer with a single 1-bit then all 0s, until there are exactly 16 bytes remaining
+    let data_len = e.length as u64;
+
+    let zeroes = [0; BLOCK_SIZE - 16];
+    e.input(&[0x80]);
+    if e.length % BLOCK_SIZE > zeroes.len() {
+        e.input(&zeroes);
+    }
+    let pad_length = zeroes.len() - (e.length % BLOCK_SIZE);
+    e.input(&zeroes[..pad_length]);
+    debug_assert_eq!(e.length % BLOCK_SIZE, zeroes.len());
+
+    e.input(&[0; 8]);
+    e.input(&(8 * data_len).to_be_bytes());
+    debug_assert_eq!(e.length % BLOCK_SIZE, 0);
+
+    Hash(e.midstate())
+}
+
+#[cfg(fuzzing)]
+pub(crate) fn from_engine(e: HashEngine) -> Hash {
+    let mut hash = e.midstate();
+    hash[0] ^= 0xff; // Make this distinct from SHA-256
+    Hash(hash)
+}
+
+macro_rules! Ch( ($x:expr, $y:expr, $z:expr) => ($z ^ ($x & ($y ^ $z))) );
+macro_rules! Maj( ($x:expr, $y:expr, $z:expr) => (($x & $y) | ($z & ($x | $y))) );
+macro_rules! Sigma0( ($x:expr) => ($x.rotate_left(36) ^ $x.rotate_left(30) ^ $x.rotate_left(25)) );
+macro_rules! Sigma1( ($x:expr) => ($x.rotate_left(50) ^ $x.rotate_left(46) ^ $x.rotate_left(23)) );
+macro_rules! sigma0( ($x:expr) => ($x.rotate_left(63) ^ $x.rotate_left(56) ^ ($x >> 7)) );
+macro_rules! sigma1( ($x:expr) => ($x.rotate_left(45) ^ $x.rotate_left(3) ^ ($x >> 6)) );
+
+macro_rules! round(
+    // first round
+    ($a:expr, $b:expr, $c:expr, $d:expr, $e:expr, $f:expr, $g:expr, $h:expr, $k:expr, $w:expr) => (
+        let t1 = $h.wrapping_add(Sigma1!($e)).wrapping_add(Ch!($e, $f, $g)).wrapping_add($k).wrapping_add($w);
+        let t2 = Sigma0!($a).wrapping_add(Maj!($a, $b, $c));
+        $d = $d.wrapping_add(t1);
+        $h = t1.wrapping_add(t2);
+    );
+    // later rounds we reassign $w before doing the first-round computation
+    ($a:expr, $b:expr, $c:expr, $d:expr, $e:expr, $f:expr, $g:expr, $h:expr, $k:expr, $w:expr, $w1:expr, $w2:expr, $w3:expr) => (
+        $w = $w.wrapping_add(sigma1!($w1)).wrapping_add($w2).wrapping_add(sigma0!($w3));
+        round!($a, $b, $c, $d, $e, $f, $g, $h, $k, $w);
+    )
+);
+
+impl HashEngine {
+    // Algorithm copied from libsecp256k1
+    pub(crate) fn process_block(&mut self) {
+        debug_assert_eq!(self.buffer.len(), BLOCK_SIZE);
+
+        let mut w = [0u64; 16];
+        for (w_val, buff_bytes) in w.iter_mut().zip(self.buffer.chunks_exact(8)) {
+            *w_val = u64::from_be_bytes(buff_bytes.try_into().expect("8 byte slice"));
+        }
+
+        let mut a = self.h[0];
+        let mut b = self.h[1];
+        let mut c = self.h[2];
+        let mut d = self.h[3];
+        let mut e = self.h[4];
+        let mut f = self.h[5];
+        let mut g = self.h[6];
+        let mut h = self.h[7];
+
+        round!(a, b, c, d, e, f, g, h, 0x428a2f98d728ae22, w[0]);
+        round!(h, a, b, c, d, e, f, g, 0x7137449123ef65cd, w[1]);
+        round!(g, h, a, b, c, d, e, f, 0xb5c0fbcfec4d3b2f, w[2]);
+        round!(f, g, h, a, b, c, d, e, 0xe9b5dba58189dbbc, w[3]);
+        round!(e, f, g, h, a, b, c, d, 0x3956c25bf348b538, w[4]);
+        round!(d, e, f, g, h, a, b, c, 0x59f111f1b605d019, w[5]);
+        round!(c, d, e, f, g, h, a, b, 0x923f82a4af194f9b, w[6]);
+        round!(b, c, d, e, f, g, h, a, 0xab1c5ed5da6d8118, w[7]);
+        round!(a, b, c, d, e, f, g, h, 0xd807aa98a3030242, w[8]);
+        round!(h, a, b, c, d, e, f, g, 0x12835b0145706fbe, w[9]);
+        round!(g, h, a, b, c, d, e, f, 0x243185be4ee4b28c, w[10]);
+        round!(f, g, h, a, b, c, d, e, 0x550c7dc3d5ffb4e2, w[11]);
+        round!(e, f, g, h, a, b, c, d, 0x72be5d74f27b896f, w[12]);
+        round!(d, e, f, g, h, a, b, c, 0x80deb1fe3b1696b1, w[13]);
+        round!(c, d, e, f, g, h, a, b, 0x9bdc06a725c71235, w[14]);
+        round!(b, c, d, e, f, g, h, a, 0xc19bf174cf692694, w[15]);
+
+        round!(a, b, c, d, e, f, g, h, 0xe49b69c19ef14ad2, w[0], w[14], w[9], w[1]);
+        round!(h, a, b, c, d, e, f, g, 0xefbe4786384f25e3, w[1], w[15], w[10], w[2]);
+        round!(g, h, a, b, c, d, e, f, 0x0fc19dc68b8cd5b5, w[2], w[0], w[11], w[3]);
+        round!(f, g, h, a, b, c, d, e, 0x240ca1cc77ac9c65, w[3], w[1], w[12], w[4]);
+        round!(e, f, g, h, a, b, c, d, 0x2de92c6f592b0275, w[4], w[2], w[13], w[5]);
+        round!(d, e, f, g, h, a, b, c, 0x4a7484aa6ea6e483, w[5], w[3], w[14], w[6]);
+        round!(c, d, e, f, g, h, a, b, 0x5cb0a9dcbd41fbd4, w[6], w[4], w[15], w[7]);
+        round!(b, c, d, e, f, g, h, a, 0x76f988da831153b5, w[7], w[5], w[0], w[8]);
+        round!(a, b, c, d, e, f, g, h, 0x983e5152ee66dfab, w[8], w[6], w[1], w[9]);
+        round!(h, a, b, c, d, e, f, g, 0xa831c66d2db43210, w[9], w[7], w[2], w[10]);
+        round!(g, h, a, b, c, d, e, f, 0xb00327c898fb213f, w[10], w[8], w[3], w[11]);
+        round!(f, g, h, a, b, c, d, e, 0xbf597fc7beef0ee4, w[11], w[9], w[4], w[12]);
+        round!(e, f, g, h, a, b, c, d, 0xc6e00bf33da88fc2, w[12], w[10], w[5], w[13]);
+        round!(d, e, f, g, h, a, b, c, 0xd5a79147930aa725, w[13], w[11], w[6], w[14]);
+        round!(c, d, e, f, g, h, a, b, 0x06ca6351e003826f, w[14], w[12], w[7], w[15]);
+        round!(b, c, d, e, f, g, h, a, 0x142929670a0e6e70, w[15], w[13], w[8], w[0]);
+
+        round!(a, b, c, d, e, f, g, h, 0x27b70a8546d22ffc, w[0], w[14], w[9], w[1]);
+        round!(h, a, b, c, d, e, f, g, 0x2e1b21385c26c926, w[1], w[15], w[10], w[2]);
+        round!(g, h, a, b, c, d, e, f, 0x4d2c6dfc5ac42aed, w[2], w[0], w[11], w[3]);
+        round!(f, g, h, a, b, c, d, e, 0x53380d139d95b3df, w[3], w[1], w[12], w[4]);
+        round!(e, f, g, h, a, b, c, d, 0x650a73548baf63de, w[4], w[2], w[13], w[5]);
+        round!(d, e, f, g, h, a, b, c, 0x766a0abb3c77b2a8, w[5], w[3], w[14], w[6]);
+        round!(c, d, e, f, g, h, a, b, 0x81c2c92e47edaee6, w[6], w[4], w[15], w[7]);
+        round!(b, c, d, e, f, g, h, a, 0x92722c851482353b, w[7], w[5], w[0], w[8]);
+        round!(a, b, c, d, e, f, g, h, 0xa2bfe8a14cf10364, w[8], w[6], w[1], w[9]);
+        round!(h, a, b, c, d, e, f, g, 0xa81a664bbc423001, w[9], w[7], w[2], w[10]);
+        round!(g, h, a, b, c, d, e, f, 0xc24b8b70d0f89791, w[10], w[8], w[3], w[11]);
+        round!(f, g, h, a, b, c, d, e, 0xc76c51a30654be30, w[11], w[9], w[4], w[12]);
+        round!(e, f, g, h, a, b, c, d, 0xd192e819d6ef5218, w[12], w[10], w[5], w[13]);
+        round!(d, e, f, g, h, a, b, c, 0xd69906245565a910, w[13], w[11], w[6], w[14]);
+        round!(c, d, e, f, g, h, a, b, 0xf40e35855771202a, w[14], w[12], w[7], w[15]);
+        round!(b, c, d, e, f, g, h, a, 0x106aa07032bbd1b8, w[15], w[13], w[8], w[0]);
+
+        round!(a, b, c, d, e, f, g, h, 0x19a4c116b8d2d0c8, w[0], w[14], w[9], w[1]);
+        round!(h, a, b, c, d, e, f, g, 0x1e376c085141ab53, w[1], w[15], w[10], w[2]);
+        round!(g, h, a, b, c, d, e, f, 0x2748774cdf8eeb99, w[2], w[0], w[11], w[3]);
+        round!(f, g, h, a, b, c, d, e, 0x34b0bcb5e19b48a8, w[3], w[1], w[12], w[4]);
+        round!(e, f, g, h, a, b, c, d, 0x391c0cb3c5c95a63, w[4], w[2], w[13], w[5]);
+        round!(d, e, f, g, h, a, b, c, 0x4ed8aa4ae3418acb, w[5], w[3], w[14], w[6]);
+        round!(c, d, e, f, g, h, a, b, 0x5b9cca4f7763e373, w[6], w[4], w[15], w[7]);
+        round!(b, c, d, e, f, g, h, a, 0x682e6ff3d6b2b8a3, w[7], w[5], w[0], w[8]);
+        round!(a, b, c, d, e, f, g, h, 0x748f82ee5defb2fc, w[8], w[6], w[1], w[9]);
+        round!(h, a, b, c, d, e, f, g, 0x78a5636f43172f60, w[9], w[7], w[2], w[10]);
+        round!(g, h, a, b, c, d, e, f, 0x84c87814a1f0ab72, w[10], w[8], w[3], w[11]);
+        round!(f, g, h, a, b, c, d, e, 0x8cc702081a6439ec, w[11], w[9], w[4], w[12]);
+        round!(e, f, g, h, a, b, c, d, 0x90befffa23631e28, w[12], w[10], w[5], w[13]);
+        round!(d, e, f, g, h, a, b, c, 0xa4506cebde82bde9, w[13], w[11], w[6], w[14]);
+        round!(c, d, e, f, g, h, a, b, 0xbef9a3f7b2c67915, w[14], w[12], w[7], w[15]);
+        round!(b, c, d, e, f, g, h, a, 0xc67178f2e372532b, w[15], w[13], w[8], w[0]);
+
+        round!(a, b, c, d, e, f, g, h, 0xca273eceea26619c, w[0], w[14], w[9], w[1]);
+        round!(h, a, b, c, d, e, f, g, 0xd186b8c721c0c207, w[1], w[15], w[10], w[2]);
+        round!(g, h, a, b, c, d, e, f, 0xeada7dd6cde0eb1e, w[2], w[0], w[11], w[3]);
+        round!(f, g, h, a, b, c, d, e, 0xf57d4f7fee6ed178, w[3], w[1], w[12], w[4]);
+        round!(e, f, g, h, a, b, c, d, 0x06f067aa72176fba, w[4], w[2], w[13], w[5]);
+        round!(d, e, f, g, h, a, b, c, 0x0a637dc5a2c898a6, w[5], w[3], w[14], w[6]);
+        round!(c, d, e, f, g, h, a, b, 0x113f9804bef90dae, w[6], w[4], w[15], w[7]);
+        round!(b, c, d, e, f, g, h, a, 0x1b710b35131c471b, w[7], w[5], w[0], w[8]);
+        round!(a, b, c, d, e, f, g, h, 0x28db77f523047d84, w[8], w[6], w[1], w[9]);
+        round!(h, a, b, c, d, e, f, g, 0x32caab7b40c72493, w[9], w[7], w[2], w[10]);
+        round!(g, h, a, b, c, d, e, f, 0x3c9ebe0a15c9bebc, w[10], w[8], w[3], w[11]);
+        round!(f, g, h, a, b, c, d, e, 0x431d67c49c100d4c, w[11], w[9], w[4], w[12]);
+        round!(e, f, g, h, a, b, c, d, 0x4cc5d4becb3e42b6, w[12], w[10], w[5], w[13]);
+        round!(d, e, f, g, h, a, b, c, 0x597f299cfc657e2a, w[13], w[11], w[6], w[14]);
+        round!(c, d, e, f, g, h, a, b, 0x5fcb6fab3ad6faec, w[14], w[12], w[7], w[15]);
+        round!(b, c, d, e, f, g, h, a, 0x6c44198c4a475817, w[15], w[13], w[8], w[0]);
+
+        self.h[0] = self.h[0].wrapping_add(a);
+        self.h[1] = self.h[1].wrapping_add(b);
+        self.h[2] = self.h[2].wrapping_add(c);
+        self.h[3] = self.h[3].wrapping_add(d);
+        self.h[4] = self.h[4].wrapping_add(e);
+        self.h[5] = self.h[5].wrapping_add(f);
+        self.h[6] = self.h[6].wrapping_add(g);
+        self.h[7] = self.h[7].wrapping_add(h);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    #[cfg(feature = "alloc")]
+    fn test() {
+        use crate::{sha512, Hash, HashEngine};
+
+        #[derive(Clone)]
+        struct Test {
+            input: &'static str,
+            output: Vec<u8>,
+            output_str: &'static str,
+        }
+
+        #[rustfmt::skip]
+        let tests = vec![
+            // Test vectors computed with `sha512sum`
+            Test {
+                input: "",
+                output: vec![
+                    0xcf, 0x83, 0xe1, 0x35, 0x7e, 0xef, 0xb8, 0xbd,
+                    0xf1, 0x54, 0x28, 0x50, 0xd6, 0x6d, 0x80, 0x07,
+                    0xd6, 0x20, 0xe4, 0x05, 0x0b, 0x57, 0x15, 0xdc,
+                    0x83, 0xf4, 0xa9, 0x21, 0xd3, 0x6c, 0xe9, 0xce,
+                    0x47, 0xd0, 0xd1, 0x3c, 0x5d, 0x85, 0xf2, 0xb0,
+                    0xff, 0x83, 0x18, 0xd2, 0x87, 0x7e, 0xec, 0x2f,
+                    0x63, 0xb9, 0x31, 0xbd, 0x47, 0x41, 0x7a, 0x81,
+                    0xa5, 0x38, 0x32, 0x7a, 0xf9, 0x27, 0xda, 0x3e,
+                ],
+                output_str: "cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e"
+            },
+            Test {
+                input: "The quick brown fox jumps over the lazy dog",
+                output: vec![
+                    0x07, 0xe5, 0x47, 0xd9, 0x58, 0x6f, 0x6a, 0x73,
+                    0xf7, 0x3f, 0xba, 0xc0, 0x43, 0x5e, 0xd7, 0x69,
+                    0x51, 0x21, 0x8f, 0xb7, 0xd0, 0xc8, 0xd7, 0x88,
+                    0xa3, 0x09, 0xd7, 0x85, 0x43, 0x6b, 0xbb, 0x64,
+                    0x2e, 0x93, 0xa2, 0x52, 0xa9, 0x54, 0xf2, 0x39,
+                    0x12, 0x54, 0x7d, 0x1e, 0x8a, 0x3b, 0x5e, 0xd6,
+                    0xe1, 0xbf, 0xd7, 0x09, 0x78, 0x21, 0x23, 0x3f,
+                    0xa0, 0x53, 0x8f, 0x3d, 0xb8, 0x54, 0xfe, 0xe6,
+                ],
+                output_str: "07e547d9586f6a73f73fbac0435ed76951218fb7d0c8d788a309d785436bbb642e93a252a954f23912547d1e8a3b5ed6e1bfd7097821233fa0538f3db854fee6",
+            },
+            Test {
+                input: "The quick brown fox jumps over the lazy dog.",
+                output: vec![
+                    0x91, 0xea, 0x12, 0x45, 0xf2, 0x0d, 0x46, 0xae,
+                    0x9a, 0x03, 0x7a, 0x98, 0x9f, 0x54, 0xf1, 0xf7,
+                    0x90, 0xf0, 0xa4, 0x76, 0x07, 0xee, 0xb8, 0xa1,
+                    0x4d, 0x12, 0x89, 0x0c, 0xea, 0x77, 0xa1, 0xbb,
+                    0xc6, 0xc7, 0xed, 0x9c, 0xf2, 0x05, 0xe6, 0x7b,
+                    0x7f, 0x2b, 0x8f, 0xd4, 0xc7, 0xdf, 0xd3, 0xa7,
+                    0xa8, 0x61, 0x7e, 0x45, 0xf3, 0xc4, 0x63, 0xd4,
+                    0x81, 0xc7, 0xe5, 0x86, 0xc3, 0x9a, 0xc1, 0xed,
+                ],
+                output_str: "91ea1245f20d46ae9a037a989f54f1f790f0a47607eeb8a14d12890cea77a1bbc6c7ed9cf205e67b7f2b8fd4c7dfd3a7a8617e45f3c463d481c7e586c39ac1ed",
+            },
+        ];
+
+        for test in tests {
+            // Hash through high-level API, check hex encoding/decoding
+            let hash = sha512::Hash::hash(test.input.as_bytes());
+            assert_eq!(hash, test.output_str.parse::<sha512::Hash>().expect("parse hex"));
+            assert_eq!(&hash[..], &test.output[..]);
+            assert_eq!(&hash.to_string(), &test.output_str);
+
+            // Hash through engine, checking that we can input byte by byte
+            let mut engine = sha512::Hash::engine();
+            for ch in test.input.as_bytes() {
+                engine.input(&[*ch]);
+            }
+            let manual_hash = sha512::Hash::from_engine(engine);
+            assert_eq!(hash, manual_hash);
+            assert_eq!(hash.to_byte_array()[..].as_ref(), test.output.as_slice());
+        }
+    }
+
+    #[cfg(feature = "serde")]
+    #[test]
+    fn sha512_serde() {
+        use serde_test::{assert_tokens, Configure, Token};
+
+        use crate::{sha512, Hash};
+
+        #[rustfmt::skip]
+        static HASH_BYTES: [u8; 64] = [
+            0x8b, 0x41, 0xe1, 0xb7, 0x8a, 0xd1, 0x15, 0x21,
+            0x11, 0x3c, 0x52, 0xff, 0x18, 0x2a, 0x1b, 0x8e,
+            0x0a, 0x19, 0x57, 0x54, 0xaa, 0x52, 0x7f, 0xcd,
+            0x00, 0xa4, 0x11, 0x62, 0x0b, 0x46, 0xf2, 0x0f,
+            0xff, 0xfb, 0x80, 0x88, 0xcc, 0xf8, 0x54, 0x97,
+            0x12, 0x1a, 0xd4, 0x49, 0x9e, 0x08, 0x45, 0xb8,
+            0x76, 0xf6, 0xdd, 0x66, 0x40, 0x08, 0x8a, 0x2f,
+            0x0b, 0x2d, 0x8a, 0x60, 0x0b, 0xdf, 0x4c, 0x0c,
+        ];
+
+        let hash = sha512::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
+        assert_tokens(&hash.compact(), &[Token::BorrowedBytes(&HASH_BYTES[..])]);
+        assert_tokens(
+            &hash.readable(),
+            &[Token::Str(
+                "8b41e1b78ad11521113c52ff182a1b8e0a195754aa527fcd00a411620b46f20f\
+                 fffb8088ccf85497121ad4499e0845b876f6dd6640088a2f0b2d8a600bdf4c0c",
+            )],
+        );
+    }
+}
+
+#[cfg(bench)]
+mod benches {
+    use test::Bencher;
+
+    use crate::{sha512, Hash, HashEngine};
+
+    #[bench]
+    pub fn sha512_10(bh: &mut Bencher) {
+        let mut engine = sha512::Hash::engine();
+        let bytes = [1u8; 10];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn sha512_1k(bh: &mut Bencher) {
+        let mut engine = sha512::Hash::engine();
+        let bytes = [1u8; 1024];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn sha512_64k(bh: &mut Bencher) {
+        let mut engine = sha512::Hash::engine();
+        let bytes = [1u8; 65536];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+}
diff --git a/hashes/src/sha512_256.rs b/hashes/src/sha512_256.rs
new file mode 100644
index 000000000..2569787c8
--- /dev/null
+++ b/hashes/src/sha512_256.rs
@@ -0,0 +1,205 @@
+// Bitcoin Hashes Library
+// Written in 2022 by
+//   The rust-dash developers.
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+// This module is largely copied from the rust-crypto ripemd.rs file;
+// while rust-crypto is licensed under Apache, that file specifically
+// was written entirely by Andrew Poelstra, who is re-licensing its
+// contents here as CC0.
+
+//! SHA512_256 implementation.
+//!
+//! SHA512/256 is a hash function that uses the sha512 alogrithm but it truncates
+//! the output to 256 bits. It has different initial constants than sha512 so it
+//! produces an entirely different hash compared to sha512. More information at
+//! <https://eprint.iacr.org/2010/548.pdf>.
+
+use core::ops::Index;
+use core::slice::SliceIndex;
+use core::str;
+
+use crate::sha512::BLOCK_SIZE;
+use crate::{sha512, Error};
+
+/// Engine to compute SHA512/256 hash function.
+///
+/// SHA512/256 is a hash function that uses the sha512 alogrithm but it truncates
+/// the output to 256 bits. It has different initial constants than sha512 so it
+/// produces an entirely different hash compared to sha512. More information at
+/// <https://eprint.iacr.org/2010/548.pdf>.
+#[derive(Clone)]
+pub struct HashEngine(sha512::HashEngine);
+
+impl Default for HashEngine {
+    #[rustfmt::skip]
+    fn default() -> Self {
+        HashEngine(sha512::HashEngine {
+            h: [
+                0x22312194fc2bf72c, 0x9f555fa3c84c64c2, 0x2393b86b6f53b151, 0x963877195940eabd,
+                0x96283ee2a88effe3, 0xbe5e1e2553863992, 0x2b0199fc2c85b8aa, 0x0eb72ddc81c52ca2,
+            ],
+            length: 0,
+            buffer: [0; BLOCK_SIZE],
+        })
+    }
+}
+
+impl crate::HashEngine for HashEngine {
+    type MidState = [u8; 64];
+
+    fn midstate(&self) -> [u8; 64] { self.0.midstate() }
+
+    const BLOCK_SIZE: usize = sha512::BLOCK_SIZE;
+
+    fn n_bytes_hashed(&self) -> usize { self.0.length }
+
+    fn input(&mut self, inp: &[u8]) { self.0.input(inp); }
+}
+
+crate::internal_macros::hash_type! {
+    256,
+    false,
+    "Output of the SHA512/256 hash function.\n\nSHA512/256 is a hash function that uses the sha512 alogrithm but it truncates the output to 256 bits. It has different initial constants than sha512 so it produces an entirely different hash compared to sha512. More information at <https://eprint.iacr.org/2010/548.pdf>. ",
+    "crate::util::json_hex_string::len_32"
+}
+
+fn from_engine(e: HashEngine) -> Hash {
+    let mut ret = [0; 32];
+    ret.copy_from_slice(&sha512::from_engine(e.0)[..32]);
+    Hash(ret)
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    #[cfg(feature = "alloc")]
+    fn test() {
+        use crate::{sha512_256, Hash, HashEngine};
+
+        #[derive(Clone)]
+        struct Test {
+            input: &'static str,
+            output: Vec<u8>,
+            output_str: &'static str,
+        }
+
+        #[rustfmt::skip]
+        let tests = vec![
+            // Examples from go sha512/256 tests.
+            Test {
+                input: "",
+                output: vec![
+                    0xc6, 0x72, 0xb8, 0xd1, 0xef, 0x56, 0xed, 0x28,
+                    0xab, 0x87, 0xc3, 0x62, 0x2c, 0x51, 0x14, 0x06,
+                    0x9b, 0xdd, 0x3a, 0xd7, 0xb8, 0xf9, 0x73, 0x74,
+                    0x98, 0xd0, 0xc0, 0x1e, 0xce, 0xf0, 0x96, 0x7a,
+                ],
+                output_str: "c672b8d1ef56ed28ab87c3622c5114069bdd3ad7b8f9737498d0c01ecef0967a"
+            },
+            Test {
+                input: "abcdef",
+                output: vec![
+                    0xe4, 0xfd, 0xcb, 0x11, 0xd1, 0xac, 0x14, 0xe6,
+                    0x98, 0x74, 0x3a, 0xcd, 0x88, 0x05, 0x17, 0x4c,
+                    0xea, 0x5d, 0xdc, 0x0d, 0x31, 0x2e, 0x3e, 0x47,
+                    0xf6, 0x37, 0x20, 0x32, 0x57, 0x1b, 0xad, 0x84,
+                ],
+                output_str: "e4fdcb11d1ac14e698743acd8805174cea5ddc0d312e3e47f6372032571bad84",
+            },
+            Test {
+                input: "Discard medicine more than two years old.",
+                output: vec![
+                    0x69, 0x0c, 0x8a, 0xd3, 0x91, 0x6c, 0xef, 0xd3,
+                    0xad, 0x29, 0x22, 0x6d, 0x98, 0x75, 0x96, 0x5e,
+                    0x3e, 0xe9, 0xec, 0x0d, 0x44, 0x82, 0xea, 0xcc,
+                    0x24, 0x8f, 0x2f, 0xf4, 0xaa, 0x0d, 0x8e, 0x5b,
+                ],
+                output_str: "690c8ad3916cefd3ad29226d9875965e3ee9ec0d4482eacc248f2ff4aa0d8e5b",
+            },
+            Test {
+                input: "There is no reason for any individual to have a computer in their home. -Ken Olsen, 1977",
+                output: vec![
+                    0xb5, 0xba, 0xf7, 0x47, 0xc3, 0x07, 0xf9, 0x88,
+                    0x49, 0xec, 0x88, 0x1c, 0xf0, 0xd4, 0x86, 0x05,
+                    0xae, 0x4e, 0xdd, 0x38, 0x63, 0x72, 0xae, 0xa9,
+                    0xb2, 0x6e, 0x71, 0xdb, 0x51, 0x7e, 0x65, 0x0b,
+                ],
+                output_str: "b5baf747c307f98849ec881cf0d48605ae4edd386372aea9b26e71db517e650b",
+            },
+            Test {
+                input: "The major problem is with sendmail.  -Mark Horton",
+                output: vec![
+                    0x53, 0xed, 0x5f, 0x9b, 0x5c, 0x0b, 0x67, 0x4a,
+                    0xc0, 0xf3, 0x42, 0x5d, 0x9f, 0x9a, 0x5d, 0x46,
+                    0x26, 0x55, 0xb0, 0x7c, 0xc9, 0x0f, 0x5d, 0x0f,
+                    0x69, 0x2e, 0xec, 0x09, 0x38, 0x84, 0xa6, 0x07,
+                ],
+                output_str: "53ed5f9b5c0b674ac0f3425d9f9a5d462655b07cc90f5d0f692eec093884a607",
+            },
+        ];
+
+        for test in tests {
+            // Hash through high-level API, check hex encoding/decoding
+            let hash = sha512_256::Hash::hash(test.input.as_bytes());
+            assert_eq!(hash, test.output_str.parse::<sha512_256::Hash>().expect("parse hex"));
+            assert_eq!(&hash[..], &test.output[..]);
+            assert_eq!(&hash.to_string(), &test.output_str);
+
+            // Hash through engine, checking that we can input byte by byte
+            let mut engine = sha512_256::Hash::engine();
+            for ch in test.input.as_bytes() {
+                engine.0.input(&[*ch]);
+            }
+            let manual_hash = sha512_256::Hash::from_engine(engine);
+            assert_eq!(hash, manual_hash);
+            assert_eq!(hash.to_byte_array()[..].as_ref(), test.output.as_slice());
+        }
+    }
+}
+
+#[cfg(bench)]
+mod benches {
+    use test::Bencher;
+
+    use crate::{sha512_256, Hash, HashEngine};
+
+    #[bench]
+    pub fn sha512_256_10(bh: &mut Bencher) {
+        let mut engine = sha512_256::Hash::engine();
+        let bytes = [1u8; 10];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn sha512_256_1k(bh: &mut Bencher) {
+        let mut engine = sha512_256::Hash::engine();
+        let bytes = [1u8; 1024];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn sha512_256_64k(bh: &mut Bencher) {
+        let mut engine = sha512_256::Hash::engine();
+        let bytes = [1u8; 65536];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+}
diff --git a/hashes/src/siphash24.rs b/hashes/src/siphash24.rs
new file mode 100644
index 000000000..78532d1dc
--- /dev/null
+++ b/hashes/src/siphash24.rs
@@ -0,0 +1,404 @@
+// Bitcoin Hashes Library
+// Written in 2019 by
+//   The rust-dash developers
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+// This module is largely copied from the rust-siphash sip.rs file;
+// while rust-siphash is licensed under Apache, that file specifically
+// was written entirely by Steven Roose, who is re-licensing its
+// contents here as CC0.
+
+//! SipHash 2-4 implementation.
+//!
+
+use core::ops::Index;
+use core::slice::SliceIndex;
+use core::{cmp, mem, ptr, str};
+
+use crate::{Error, Hash as _, HashEngine as _};
+
+crate::internal_macros::hash_type! {
+    64,
+    false,
+    "Output of the SipHash24 hash function.",
+    "crate::util::json_hex_string::len_8"
+}
+
+#[cfg(not(fuzzing))]
+fn from_engine(e: HashEngine) -> Hash { Hash::from_u64(Hash::from_engine_to_u64(e)) }
+
+#[cfg(fuzzing)]
+fn from_engine(e: HashEngine) -> Hash {
+    let state = e.midstate();
+    Hash::from_u64(state.v0 ^ state.v1 ^ state.v2 ^ state.v3)
+}
+
+macro_rules! compress {
+    ($state:expr) => {{
+        compress!($state.v0, $state.v1, $state.v2, $state.v3)
+    }};
+    ($v0:expr, $v1:expr, $v2:expr, $v3:expr) => {{
+        $v0 = $v0.wrapping_add($v1);
+        $v1 = $v1.rotate_left(13);
+        $v1 ^= $v0;
+        $v0 = $v0.rotate_left(32);
+        $v2 = $v2.wrapping_add($v3);
+        $v3 = $v3.rotate_left(16);
+        $v3 ^= $v2;
+        $v0 = $v0.wrapping_add($v3);
+        $v3 = $v3.rotate_left(21);
+        $v3 ^= $v0;
+        $v2 = $v2.wrapping_add($v1);
+        $v1 = $v1.rotate_left(17);
+        $v1 ^= $v2;
+        $v2 = $v2.rotate_left(32);
+    }};
+}
+
+/// Load an integer of the desired type from a byte stream, in LE order. Uses
+/// `copy_nonoverlapping` to let the compiler generate the most efficient way
+/// to load it from a possibly unaligned address.
+///
+/// Unsafe because: unchecked indexing at `i..i+size_of(int_ty)`.
+macro_rules! load_int_le {
+    ($buf:expr, $i:expr, $int_ty:ident) => {{
+        debug_assert!($i + mem::size_of::<$int_ty>() <= $buf.len());
+        let mut data = 0 as $int_ty;
+        ptr::copy_nonoverlapping(
+            $buf.get_unchecked($i),
+            &mut data as *mut _ as *mut u8,
+            mem::size_of::<$int_ty>(),
+        );
+        data.to_le()
+    }};
+}
+
+/// Internal state of the [`HashEngine`].
+#[derive(Debug, Clone)]
+pub struct State {
+    // v0, v2 and v1, v3 show up in pairs in the algorithm,
+    // and simd implementations of SipHash will use vectors
+    // of v02 and v13. By placing them in this order in the struct,
+    // the compiler can pick up on just a few simd optimizations by itself.
+    v0: u64,
+    v2: u64,
+    v1: u64,
+    v3: u64,
+}
+
+/// Engine to compute the SipHash24 hash function.
+#[derive(Debug, Clone)]
+pub struct HashEngine {
+    k0: u64,
+    k1: u64,
+    length: usize, // how many bytes we've processed
+    state: State,  // hash State
+    tail: u64,     // unprocessed bytes le
+    ntail: usize,  // how many bytes in tail are valid
+}
+
+impl HashEngine {
+    /// Creates a new SipHash24 engine with keys.
+    pub fn with_keys(k0: u64, k1: u64) -> HashEngine {
+        HashEngine {
+            k0,
+            k1,
+            length: 0,
+            state: State {
+                v0: k0 ^ 0x736f6d6570736575,
+                v1: k1 ^ 0x646f72616e646f6d,
+                v2: k0 ^ 0x6c7967656e657261,
+                v3: k1 ^ 0x7465646279746573,
+            },
+            tail: 0,
+            ntail: 0,
+        }
+    }
+
+    /// Creates a new SipHash24 engine.
+    pub fn new() -> HashEngine { HashEngine::with_keys(0, 0) }
+
+    /// Retrieves the keys of this engine.
+    pub fn keys(&self) -> (u64, u64) { (self.k0, self.k1) }
+
+    #[inline]
+    fn c_rounds(state: &mut State) {
+        compress!(state);
+        compress!(state);
+    }
+
+    #[inline]
+    fn d_rounds(state: &mut State) {
+        compress!(state);
+        compress!(state);
+        compress!(state);
+        compress!(state);
+    }
+}
+
+impl Default for HashEngine {
+    fn default() -> Self { HashEngine::new() }
+}
+
+impl crate::HashEngine for HashEngine {
+    type MidState = State;
+
+    fn midstate(&self) -> State { self.state.clone() }
+
+    const BLOCK_SIZE: usize = 8;
+
+    #[inline]
+    fn input(&mut self, msg: &[u8]) {
+        let length = msg.len();
+        self.length += length;
+
+        let mut needed = 0;
+
+        if self.ntail != 0 {
+            needed = 8 - self.ntail;
+            self.tail |= unsafe { u8to64_le(msg, 0, cmp::min(length, needed)) } << (8 * self.ntail);
+            if length < needed {
+                self.ntail += length;
+                return;
+            } else {
+                self.state.v3 ^= self.tail;
+                HashEngine::c_rounds(&mut self.state);
+                self.state.v0 ^= self.tail;
+                self.ntail = 0;
+            }
+        }
+
+        // Buffered tail is now flushed, process new input.
+        let len = length - needed;
+        let left = len & 0x7;
+
+        let mut i = needed;
+        while i < len - left {
+            let mi = unsafe { load_int_le!(msg, i, u64) };
+
+            self.state.v3 ^= mi;
+            HashEngine::c_rounds(&mut self.state);
+            self.state.v0 ^= mi;
+
+            i += 8;
+        }
+
+        self.tail = unsafe { u8to64_le(msg, i, left) };
+        self.ntail = left;
+    }
+
+    fn n_bytes_hashed(&self) -> usize { self.length }
+}
+
+impl Hash {
+    /// Hashes the given data with an engine with the provided keys.
+    pub fn hash_with_keys(k0: u64, k1: u64, data: &[u8]) -> Hash {
+        let mut engine = HashEngine::with_keys(k0, k1);
+        engine.input(data);
+        Hash::from_engine(engine)
+    }
+
+    /// Hashes the given data directly to u64 with an engine with the provided keys.
+    pub fn hash_to_u64_with_keys(k0: u64, k1: u64, data: &[u8]) -> u64 {
+        let mut engine = HashEngine::with_keys(k0, k1);
+        engine.input(data);
+        Hash::from_engine_to_u64(engine)
+    }
+
+    /// Produces a hash as `u64` from the current state of a given engine.
+    #[inline]
+    pub fn from_engine_to_u64(e: HashEngine) -> u64 {
+        let mut state = e.state;
+
+        let b: u64 = ((e.length as u64 & 0xff) << 56) | e.tail;
+
+        state.v3 ^= b;
+        HashEngine::c_rounds(&mut state);
+        state.v0 ^= b;
+
+        state.v2 ^= 0xff;
+        HashEngine::d_rounds(&mut state);
+
+        state.v0 ^ state.v1 ^ state.v2 ^ state.v3
+    }
+
+    /// Returns the (little endian) 64-bit integer representation of the hash value.
+    pub fn as_u64(&self) -> u64 { u64::from_le_bytes(self.0) }
+
+    /// Creates a hash from its (little endian) 64-bit integer representation.
+    pub fn from_u64(hash: u64) -> Hash { Hash(hash.to_le_bytes()) }
+}
+
+/// Load an u64 using up to 7 bytes of a byte slice.
+///
+/// Unsafe because: unchecked indexing at `start..start+len`.
+#[inline]
+unsafe fn u8to64_le(buf: &[u8], start: usize, len: usize) -> u64 {
+    debug_assert!(len < 8);
+    let mut i = 0; // current byte index (from LSB) in the output u64
+    let mut out = 0;
+    if i + 3 < len {
+        out = u64::from(load_int_le!(buf, start + i, u32));
+        i += 4;
+    }
+    if i + 1 < len {
+        out |= u64::from(load_int_le!(buf, start + i, u16)) << (i * 8);
+        i += 2
+    }
+    if i < len {
+        out |= u64::from(*buf.get_unchecked(start + i)) << (i * 8);
+        i += 1;
+    }
+    debug_assert_eq!(i, len);
+    out
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_siphash_2_4() {
+        #[rustfmt::skip]
+        let vecs: [[u8; 8]; 64] = [
+            [0x31, 0x0e, 0x0e, 0xdd, 0x47, 0xdb, 0x6f, 0x72],
+            [0xfd, 0x67, 0xdc, 0x93, 0xc5, 0x39, 0xf8, 0x74],
+            [0x5a, 0x4f, 0xa9, 0xd9, 0x09, 0x80, 0x6c, 0x0d],
+            [0x2d, 0x7e, 0xfb, 0xd7, 0x96, 0x66, 0x67, 0x85],
+            [0xb7, 0x87, 0x71, 0x27, 0xe0, 0x94, 0x27, 0xcf],
+            [0x8d, 0xa6, 0x99, 0xcd, 0x64, 0x55, 0x76, 0x18],
+            [0xce, 0xe3, 0xfe, 0x58, 0x6e, 0x46, 0xc9, 0xcb],
+            [0x37, 0xd1, 0x01, 0x8b, 0xf5, 0x00, 0x02, 0xab],
+            [0x62, 0x24, 0x93, 0x9a, 0x79, 0xf5, 0xf5, 0x93],
+            [0xb0, 0xe4, 0xa9, 0x0b, 0xdf, 0x82, 0x00, 0x9e],
+            [0xf3, 0xb9, 0xdd, 0x94, 0xc5, 0xbb, 0x5d, 0x7a],
+            [0xa7, 0xad, 0x6b, 0x22, 0x46, 0x2f, 0xb3, 0xf4],
+            [0xfb, 0xe5, 0x0e, 0x86, 0xbc, 0x8f, 0x1e, 0x75],
+            [0x90, 0x3d, 0x84, 0xc0, 0x27, 0x56, 0xea, 0x14],
+            [0xee, 0xf2, 0x7a, 0x8e, 0x90, 0xca, 0x23, 0xf7],
+            [0xe5, 0x45, 0xbe, 0x49, 0x61, 0xca, 0x29, 0xa1],
+            [0xdb, 0x9b, 0xc2, 0x57, 0x7f, 0xcc, 0x2a, 0x3f],
+            [0x94, 0x47, 0xbe, 0x2c, 0xf5, 0xe9, 0x9a, 0x69],
+            [0x9c, 0xd3, 0x8d, 0x96, 0xf0, 0xb3, 0xc1, 0x4b],
+            [0xbd, 0x61, 0x79, 0xa7, 0x1d, 0xc9, 0x6d, 0xbb],
+            [0x98, 0xee, 0xa2, 0x1a, 0xf2, 0x5c, 0xd6, 0xbe],
+            [0xc7, 0x67, 0x3b, 0x2e, 0xb0, 0xcb, 0xf2, 0xd0],
+            [0x88, 0x3e, 0xa3, 0xe3, 0x95, 0x67, 0x53, 0x93],
+            [0xc8, 0xce, 0x5c, 0xcd, 0x8c, 0x03, 0x0c, 0xa8],
+            [0x94, 0xaf, 0x49, 0xf6, 0xc6, 0x50, 0xad, 0xb8],
+            [0xea, 0xb8, 0x85, 0x8a, 0xde, 0x92, 0xe1, 0xbc],
+            [0xf3, 0x15, 0xbb, 0x5b, 0xb8, 0x35, 0xd8, 0x17],
+            [0xad, 0xcf, 0x6b, 0x07, 0x63, 0x61, 0x2e, 0x2f],
+            [0xa5, 0xc9, 0x1d, 0xa7, 0xac, 0xaa, 0x4d, 0xde],
+            [0x71, 0x65, 0x95, 0x87, 0x66, 0x50, 0xa2, 0xa6],
+            [0x28, 0xef, 0x49, 0x5c, 0x53, 0xa3, 0x87, 0xad],
+            [0x42, 0xc3, 0x41, 0xd8, 0xfa, 0x92, 0xd8, 0x32],
+            [0xce, 0x7c, 0xf2, 0x72, 0x2f, 0x51, 0x27, 0x71],
+            [0xe3, 0x78, 0x59, 0xf9, 0x46, 0x23, 0xf3, 0xa7],
+            [0x38, 0x12, 0x05, 0xbb, 0x1a, 0xb0, 0xe0, 0x12],
+            [0xae, 0x97, 0xa1, 0x0f, 0xd4, 0x34, 0xe0, 0x15],
+            [0xb4, 0xa3, 0x15, 0x08, 0xbe, 0xff, 0x4d, 0x31],
+            [0x81, 0x39, 0x62, 0x29, 0xf0, 0x90, 0x79, 0x02],
+            [0x4d, 0x0c, 0xf4, 0x9e, 0xe5, 0xd4, 0xdc, 0xca],
+            [0x5c, 0x73, 0x33, 0x6a, 0x76, 0xd8, 0xbf, 0x9a],
+            [0xd0, 0xa7, 0x04, 0x53, 0x6b, 0xa9, 0x3e, 0x0e],
+            [0x92, 0x59, 0x58, 0xfc, 0xd6, 0x42, 0x0c, 0xad],
+            [0xa9, 0x15, 0xc2, 0x9b, 0xc8, 0x06, 0x73, 0x18],
+            [0x95, 0x2b, 0x79, 0xf3, 0xbc, 0x0a, 0xa6, 0xd4],
+            [0xf2, 0x1d, 0xf2, 0xe4, 0x1d, 0x45, 0x35, 0xf9],
+            [0x87, 0x57, 0x75, 0x19, 0x04, 0x8f, 0x53, 0xa9],
+            [0x10, 0xa5, 0x6c, 0xf5, 0xdf, 0xcd, 0x9a, 0xdb],
+            [0xeb, 0x75, 0x09, 0x5c, 0xcd, 0x98, 0x6c, 0xd0],
+            [0x51, 0xa9, 0xcb, 0x9e, 0xcb, 0xa3, 0x12, 0xe6],
+            [0x96, 0xaf, 0xad, 0xfc, 0x2c, 0xe6, 0x66, 0xc7],
+            [0x72, 0xfe, 0x52, 0x97, 0x5a, 0x43, 0x64, 0xee],
+            [0x5a, 0x16, 0x45, 0xb2, 0x76, 0xd5, 0x92, 0xa1],
+            [0xb2, 0x74, 0xcb, 0x8e, 0xbf, 0x87, 0x87, 0x0a],
+            [0x6f, 0x9b, 0xb4, 0x20, 0x3d, 0xe7, 0xb3, 0x81],
+            [0xea, 0xec, 0xb2, 0xa3, 0x0b, 0x22, 0xa8, 0x7f],
+            [0x99, 0x24, 0xa4, 0x3c, 0xc1, 0x31, 0x57, 0x24],
+            [0xbd, 0x83, 0x8d, 0x3a, 0xaf, 0xbf, 0x8d, 0xb7],
+            [0x0b, 0x1a, 0x2a, 0x32, 0x65, 0xd5, 0x1a, 0xea],
+            [0x13, 0x50, 0x79, 0xa3, 0x23, 0x1c, 0xe6, 0x60],
+            [0x93, 0x2b, 0x28, 0x46, 0xe4, 0xd7, 0x06, 0x66],
+            [0xe1, 0x91, 0x5f, 0x5c, 0xb1, 0xec, 0xa4, 0x6c],
+            [0xf3, 0x25, 0x96, 0x5c, 0xa1, 0x6d, 0x62, 0x9f],
+            [0x57, 0x5f, 0xf2, 0x8e, 0x60, 0x38, 0x1b, 0xe5],
+            [0x72, 0x45, 0x06, 0xeb, 0x4c, 0x32, 0x8a, 0x95],
+        ];
+
+        let k0 = 0x_07_06_05_04_03_02_01_00;
+        let k1 = 0x_0f_0e_0d_0c_0b_0a_09_08;
+        let mut vin = [0u8; 64];
+        let mut state_inc = HashEngine::with_keys(k0, k1);
+
+        for i in 0..64 {
+            vin[i] = i as u8;
+            let vec = Hash::from_slice(&vecs[i][..]).unwrap();
+            let out = Hash::hash_with_keys(k0, k1, &vin[0..i]);
+            assert_eq!(vec, out, "vec #{}", i);
+
+            let inc = Hash::from_engine(state_inc.clone());
+            assert_eq!(vec, inc, "vec #{}", i);
+            state_inc.input(&[i as u8]);
+        }
+    }
+}
+
+#[cfg(bench)]
+mod benches {
+    use test::Bencher;
+
+    use crate::{siphash24, Hash, HashEngine};
+
+    #[bench]
+    pub fn siphash24_1ki(bh: &mut Bencher) {
+        let mut engine = siphash24::Hash::engine();
+        let bytes = [1u8; 1024];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn siphash24_64ki(bh: &mut Bencher) {
+        let mut engine = siphash24::Hash::engine();
+        let bytes = [1u8; 65536];
+        bh.iter(|| {
+            engine.input(&bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn siphash24_1ki_hash(bh: &mut Bencher) {
+        let k0 = 0x_07_06_05_04_03_02_01_00;
+        let k1 = 0x_0f_0e_0d_0c_0b_0a_09_08;
+        let bytes = [1u8; 1024];
+        bh.iter(|| {
+            let _ = siphash24::Hash::hash_with_keys(k0, k1, &bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+
+    #[bench]
+    pub fn siphash24_1ki_hash_u64(bh: &mut Bencher) {
+        let k0 = 0x_07_06_05_04_03_02_01_00;
+        let k1 = 0x_0f_0e_0d_0c_0b_0a_09_08;
+        let bytes = [1u8; 1024];
+        bh.iter(|| {
+            let _ = siphash24::Hash::hash_to_u64_with_keys(k0, k1, &bytes);
+        });
+        bh.bytes = bytes.len() as u64;
+    }
+}
diff --git a/hashes/src/util.rs b/hashes/src/util.rs
new file mode 100644
index 000000000..84467dc57
--- /dev/null
+++ b/hashes/src/util.rs
@@ -0,0 +1,498 @@
+// Bitcoin Hashes Library
+// Written in 2018 by
+//   Andrew Poelstra <apoelstra@wpsoftware.net>
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this software to
+// the public domain worldwide. This software is distributed without
+// any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication
+// along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+//
+
+#[macro_export]
+/// Adds hexadecimal formatting implementation of a trait `$imp` to a given type `$ty`.
+macro_rules! hex_fmt_impl(
+    ($reverse:expr, $ty:ident) => (
+        $crate::hex_fmt_impl!($reverse, $ty, );
+    );
+    ($reverse:expr, $ty:ident, $($gen:ident: $gent:ident),*) => (
+        impl<$($gen: $gent),*> $crate::_export::_core::fmt::LowerHex for $ty<$($gen),*> {
+            #[inline]
+            fn fmt(&self, f: &mut $crate::_export::_core::fmt::Formatter) -> $crate::_export::_core::fmt::Result {
+                if $reverse {
+                    $crate::_export::_core::fmt::LowerHex::fmt(&self.0.backward_hex(), f)
+                } else {
+                    $crate::_export::_core::fmt::LowerHex::fmt(&self.0.forward_hex(), f)
+                }
+            }
+        }
+
+        impl<$($gen: $gent),*> $crate::_export::_core::fmt::UpperHex for $ty<$($gen),*> {
+            #[inline]
+            fn fmt(&self, f: &mut $crate::_export::_core::fmt::Formatter) -> $crate::_export::_core::fmt::Result {
+                if $reverse {
+                    $crate::_export::_core::fmt::UpperHex::fmt(&self.0.backward_hex(), f)
+                } else {
+                    $crate::_export::_core::fmt::UpperHex::fmt(&self.0.forward_hex(), f)
+                }
+            }
+        }
+
+        impl<$($gen: $gent),*> $crate::_export::_core::fmt::Display for $ty<$($gen),*> {
+            #[inline]
+            fn fmt(&self, f: &mut $crate::_export::_core::fmt::Formatter) -> $crate::_export::_core::fmt::Result {
+                $crate::_export::_core::fmt::LowerHex::fmt(&self, f)
+            }
+        }
+
+        impl<$($gen: $gent),*> $crate::_export::_core::fmt::Debug for $ty<$($gen),*> {
+            #[inline]
+            fn fmt(&self, f: &mut $crate::_export::_core::fmt::Formatter) -> $crate::_export::_core::fmt::Result {
+                write!(f, "{:#}", self)
+            }
+        }
+    );
+);
+
+/// Adds slicing traits implementations to a given type `$ty`
+#[macro_export]
+macro_rules! borrow_slice_impl(
+    ($ty:ident) => (
+        $crate::borrow_slice_impl!($ty, );
+    );
+    ($ty:ident, $($gen:ident: $gent:ident),*) => (
+        impl<$($gen: $gent),*> $crate::_export::_core::borrow::Borrow<[u8]> for $ty<$($gen),*>  {
+            fn borrow(&self) -> &[u8] {
+                &self[..]
+            }
+        }
+
+        impl<$($gen: $gent),*> $crate::_export::_core::convert::AsRef<[u8]> for $ty<$($gen),*>  {
+            fn as_ref(&self) -> &[u8] {
+                &self[..]
+            }
+        }
+    )
+);
+
+macro_rules! engine_input_impl(
+    () => (
+        #[cfg(not(fuzzing))]
+        fn input(&mut self, mut inp: &[u8]) {
+            while !inp.is_empty() {
+                let buf_idx = self.length % <Self as crate::HashEngine>::BLOCK_SIZE;
+                let rem_len = <Self as crate::HashEngine>::BLOCK_SIZE - buf_idx;
+                let write_len = cmp::min(rem_len, inp.len());
+
+                self.buffer[buf_idx..buf_idx + write_len]
+                    .copy_from_slice(&inp[..write_len]);
+                self.length += write_len;
+                if self.length % <Self as crate::HashEngine>::BLOCK_SIZE == 0 {
+                    self.process_block();
+                }
+                inp = &inp[write_len..];
+            }
+        }
+
+        #[cfg(fuzzing)]
+        fn input(&mut self, inp: &[u8]) {
+            for c in inp {
+                self.buffer[0] ^= *c;
+            }
+            self.length += inp.len();
+        }
+    )
+);
+
+/// Creates a new newtype around a [`Hash`] type.
+///
+/// The syntax is similar to the usual tuple struct syntax:
+///
+/// ```
+/// # use dashcore_hashes::{hash_newtype, sha256};
+/// hash_newtype! {
+///     /// Hash of `Foo`.
+///     pub struct MyNewtype(pub sha256::Hash);
+/// }
+/// ```
+///
+/// You can use any valid visibility specifier in place of `pub` or you can omit either or both, if
+/// you want the type or its field to be private.
+///
+/// Whether the hash is reversed or not when displaying depends on the inner type. However you can
+/// override it like this:
+///
+/// ```
+/// # use dashcore_hashes::{hash_newtype, sha256};
+/// hash_newtype! {
+///     #[hash_newtype(backward)]
+///     struct MyNewtype(sha256::Hash);
+/// }
+/// ```
+///
+/// This will display the hash backwards regardless of what the inner type does. Use `forward`
+/// instead of `backward` to force displaying forward.
+///
+/// You can add arbitrary doc comments or other attributes to the struct or it's field. Note that
+/// the macro already derives [`Copy`], [`Clone`], [`Eq`], [`PartialEq`],
+/// [`Hash`](core::hash::Hash), [`Ord`], [`PartialOrd`]. With the `serde` feature on, this also adds
+/// [`Serialize`](serde::Serialize) and [`Deserialize](serde::Deserialize) implementations.
+///
+/// You can also define multiple newtypes within one macro call:
+///
+/// ```
+/// # use dashcore_hashes::{hash_newtype, sha256, hash160};
+///
+/// hash_newtype! {
+///     /// My custom type 1
+///     pub struct Newtype1(sha256::Hash);
+///
+///     /// My custom type 2
+///     struct Newtype2(hash160::Hash);
+/// }
+/// ```
+///
+/// Note: the macro is internally recursive. If you use too many attributes (> 256 tokens) you may
+/// hit recursion limit. If you have so many attributes for a good reason, just raising the limit
+/// should be OK. Note however that attribute-processing part has to use [TT muncher] which has
+/// quadratic complexity, so having many attributes may blow up compile time. This should be rare.
+///
+/// [TT muncher]: https://danielkeep.github.io/tlborm/book/pat-incremental-tt-munchers.html
+///
+// Ever heard of legendary comments warning developers to not touch the code? Yep, here's another
+// one. The following code is written the way it is for some specific reasons. If you think you can
+// simplify it, I suggest spending your time elsewhere.
+//
+// If you looks at the code carefully you might ask these questions:
+//
+// * Why are attributes using `tt` and not `meta`?!
+// * Why are the macros split like that?!
+// * Why use recursion instead of `$()*`?
+//
+// None of these are here by accident. For some reason unknown to me, if you accept an argument to
+// macro with any fragment specifier other than `tt` it will **not** match any of the rules
+// requiring a specific token. Yep, I tried it, I literally got error that `hash_newtype` doesn't
+// match `hash_newtype`. So all input attributes must be `tt`.
+//
+// Originally I wanted to define a bunch of macros that would filter-out hash_type attributes. Then
+// I remembered (by seeing compiler error) that calling macros is not allowed inside attributes.
+// And no, you can't bypass it by calling a helper macro and passing "output of another macro" into
+// it. The whole macro gets passed, not the resulting value. So we have to generate the entire
+// attributes. And you can't just place an attribute-producing macro above struct - they are
+// considered separate items. This is not C.
+//
+// Thus struct is generated in a separate macro together with attributes. And since the macro needs
+// attributes as the input and I didn't want to create confusion by using `#[]` syntax *after*
+// struct, I opted to use `{}` as a separator. Yes, a separator is required because an attribute
+// may be composed of multiple token trees - that's the point of "double repetition".
+#[macro_export]
+macro_rules! hash_newtype {
+    ($($(#[$($type_attrs:tt)*])* $type_vis:vis struct $newtype:ident($(#[$field_attrs:tt])* $field_vis:vis $hash:path);)+) => {
+        $(
+        $($crate::hash_newtype_known_attrs!(#[ $($type_attrs)* ]);)*
+
+        $crate::hash_newtype_struct! {
+            $type_vis struct $newtype($(#[$field_attrs])* $field_vis $hash);
+
+            $({ $($type_attrs)* })*
+        }
+
+        $crate::hex_fmt_impl!(<$newtype as $crate::Hash>::DISPLAY_BACKWARD, $newtype);
+        $crate::serde_impl!($newtype, <$newtype as $crate::Hash>::LEN);
+        $crate::borrow_slice_impl!($newtype);
+
+        impl $newtype {
+            /// Creates this wrapper type from the inner hash type.
+            #[allow(unused)] // the user of macro may not need this
+            pub fn from_raw_hash(inner: $hash) -> $newtype {
+                $newtype(inner)
+            }
+
+            /// Returns the inner hash (sha256, sh256d etc.).
+            #[allow(unused)] // the user of macro may not need this
+            pub fn to_raw_hash(self) -> $hash {
+                self.0
+            }
+
+            /// Returns a reference to the inner hash (sha256, sh256d etc.).
+            #[allow(unused)] // the user of macro may not need this
+            pub fn as_raw_hash(&self) -> &$hash {
+                &self.0
+            }
+        }
+
+        impl $crate::_export::_core::convert::From<$hash> for $newtype {
+            fn from(inner: $hash) -> $newtype {
+                // Due to rust 1.22 we have to use this instead of simple `Self(inner)`
+                Self { 0: inner }
+            }
+        }
+
+        impl $crate::_export::_core::convert::From<$newtype> for $hash {
+            fn from(hashtype: $newtype) -> $hash {
+                hashtype.0
+            }
+        }
+
+        impl $crate::Hash for $newtype {
+            type Engine = <$hash as $crate::Hash>::Engine;
+            type Bytes = <$hash as $crate::Hash>::Bytes;
+
+            const LEN: usize = <$hash as $crate::Hash>::LEN;
+            const DISPLAY_BACKWARD: bool = $crate::hash_newtype_get_direction!($hash, $(#[$($type_attrs)*])*);
+
+            fn engine() -> Self::Engine {
+                <$hash as $crate::Hash>::engine()
+            }
+
+            fn from_engine(e: Self::Engine) -> Self {
+                Self::from(<$hash as $crate::Hash>::from_engine(e))
+            }
+
+            #[inline]
+            fn from_slice(sl: &[u8]) -> Result<$newtype, $crate::Error> {
+                Ok($newtype(<$hash as $crate::Hash>::from_slice(sl)?))
+            }
+
+            #[inline]
+            fn from_byte_array(bytes: Self::Bytes) -> Self {
+                $newtype(<$hash as $crate::Hash>::from_byte_array(bytes))
+            }
+
+            #[inline]
+            fn to_byte_array(self) -> Self::Bytes {
+                self.0.to_byte_array()
+            }
+
+            #[inline]
+            fn as_byte_array(&self) -> &Self::Bytes {
+                self.0.as_byte_array()
+            }
+
+            #[inline]
+            fn all_zeros() -> Self {
+                let zeros = <$hash>::all_zeros();
+                $newtype(zeros)
+            }
+        }
+
+        impl $crate::_export::_core::str::FromStr for $newtype {
+            type Err = $crate::hex::Error;
+            fn from_str(s: &str) -> $crate::_export::_core::result::Result<$newtype, Self::Err> {
+                use $crate::hex::{HexIterator, FromHex};
+                use $crate::Hash;
+
+                let inner: <$hash as Hash>::Bytes = if <Self as $crate::Hash>::DISPLAY_BACKWARD {
+                    FromHex::from_byte_iter(HexIterator::new(s)?.rev())?
+                } else {
+                    FromHex::from_byte_iter(HexIterator::new(s)?)?
+                };
+                Ok($newtype(<$hash>::from_byte_array(inner)))
+            }
+        }
+
+        impl $crate::_export::_core::convert::AsRef<[u8; <$hash as $crate::Hash>::LEN]> for $newtype {
+            fn as_ref(&self) -> &[u8; <$hash as $crate::Hash>::LEN] {
+                AsRef::<[u8; <$hash as $crate::Hash>::LEN]>::as_ref(&self.0)
+            }
+        }
+
+        impl<I: $crate::_export::_core::slice::SliceIndex<[u8]>> $crate::_export::_core::ops::Index<I> for $newtype {
+            type Output = I::Output;
+
+            #[inline]
+            fn index(&self, index: I) -> &Self::Output {
+                &self.0[index]
+            }
+        }
+        )+
+    };
+}
+
+// Generates the struct only (no impls)
+//
+// This is a separate macro to make it more readable and have a separate interface that allows for
+// two groups of type attributes: processed and not-yet-processed ones (think about it like
+// computation via recursion). The macro recursively matches unprocessed attributes, popping them
+// one at a time and either ignoring them (`hash_newtype`) or appending them to the list of
+// processed attributes to be added to the struct.
+//
+// Once the list of not-yet-processed attributes is empty the struct is generated with processed
+// attributes added.
+#[doc(hidden)]
+#[macro_export]
+macro_rules! hash_newtype_struct {
+    ($(#[$other_attrs:meta])* $type_vis:vis struct $newtype:ident($(#[$field_attrs:meta])* $field_vis:vis $hash:path);) => {
+        $(#[$other_attrs])*
+        #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+        $type_vis struct $newtype($(#[$field_attrs])* $field_vis $hash);
+    };
+    ($(#[$other_attrs:meta])* $type_vis:vis struct $newtype:ident($(#[$field_attrs:meta])* $field_vis:vis $hash:path); { hash_newtype($($ignore:tt)*) } $($type_attrs:tt)*) => {
+        $crate::hash_newtype_struct! {
+            $(#[$other_attrs])*
+            $type_vis struct $newtype($(#[$field_attrs])* $field_vis $hash);
+
+            $($type_attrs)*
+        }
+    };
+    ($(#[$other_attrs:meta])* $type_vis:vis struct $newtype:ident($(#[$field_attrs:meta])* $field_vis:vis $hash:path); { $other_attr:meta } $($type_attrs:tt)*) => {
+        $crate::hash_newtype_struct! {
+            $(#[$other_attrs])*
+            #[$other_attr]
+            $type_vis struct $newtype($(#[$field_attrs])* $field_vis $hash);
+
+            $($type_attrs)*
+        }
+    };
+}
+
+// Extracts `hash_newtype(forward)` and `hash_newtype(backward)` attributes if any and turns them
+// into bool, defaulting to `DISPLAY_BACKWARD` of the wrapped type if the attribute is omitted.
+//
+// Once an appropriate attribute is found we pass the remaining ones into another macro to detect
+// duplicates/conflicts and report an error.
+//
+// FYI, no, we can't use a helper macro to first filter all `hash_newtype` attributes. We would be
+// attempting to match on macros instead. So we must write `hashe_newtype` in each branch.
+#[doc(hidden)]
+#[macro_export]
+macro_rules! hash_newtype_get_direction {
+    ($hash:ty, ) => { <$hash as $crate::Hash>::DISPLAY_BACKWARD };
+    ($hash:ty, #[hash_newtype(forward)] $($others:tt)*) => { { $crate::hash_newtype_forbid_direction!(forward, $($others)*); false } };
+    ($hash:ty, #[hash_newtype(backward)] $($others:tt)*) => { { $crate::hash_newtype_forbid_direction!(backward, $($others)*); true } };
+    ($hash:ty, #[$($ignore:tt)*]  $($others:tt)*) => { $crate::hash_newtype_get_direction!($hash, $($others)*) };
+}
+
+// Reports an error if any of the attributes is `hash_newtype($direction)`.
+//
+// This is used for detection of duplicates/conflicts, see the macro above.
+#[doc(hidden)]
+#[macro_export]
+macro_rules! hash_newtype_forbid_direction {
+    ($direction:ident, ) => {};
+    ($direction:ident, #[hash_newtype(forward)] $(others:tt)*) => {
+        compile_error!(concat!("Cannot set display direction to forward: ", stringify!($direction), " was already specified"));
+    };
+    ($direction:ident, #[hash_newtype(backward)] $(others:tt)*) => {
+        compile_error!(concat!("Cannot set display direction to backward: ", stringify!($direction), " was already specified"));
+    };
+    ($direction:ident, #[$($ignore:tt)*] $(#[$others:tt])*) => {
+        $crate::hash_newtype_forbid_direction!($direction, $(#[$others])*)
+    };
+}
+
+// Checks (at compile time) that all `hash_newtype` attributes are known.
+//
+// An unknown attribute could be a typo that could cause problems - e.g. wrong display direction if
+// it's missing. To prevent this, we call this macro above. The macro produces nothing unless an
+// unknown attribute is found in which case it produces `compile_error!`.
+#[doc(hidden)]
+#[macro_export]
+macro_rules! hash_newtype_known_attrs {
+    (#[hash_newtype(forward)]) => {};
+    (#[hash_newtype(backward)]) => {};
+    (#[hash_newtype($($unknown:tt)*)]) => { compile_error!(concat!("Unrecognized attribute ", stringify!($($unknown)*))); };
+    ($($ignore:tt)*) => {};
+}
+
+#[cfg(feature = "schemars")]
+pub mod json_hex_string {
+    use schemars::gen::SchemaGenerator;
+    use schemars::schema::{Schema, SchemaObject};
+    use schemars::JsonSchema;
+    macro_rules! define_custom_hex {
+        ($name:ident, $len:expr) => {
+            pub fn $name(gen: &mut SchemaGenerator) -> Schema {
+                let mut schema: SchemaObject = <String>::json_schema(gen).into();
+                schema.string = Some(Box::new(schemars::schema::StringValidation {
+                    max_length: Some($len * 2),
+                    min_length: Some($len * 2),
+                    pattern: Some("[0-9a-fA-F]+".to_owned()),
+                }));
+                schema.into()
+            }
+        };
+    }
+    define_custom_hex!(len_8, 8);
+    define_custom_hex!(len_20, 20);
+    define_custom_hex!(len_32, 32);
+    define_custom_hex!(len_64, 64);
+}
+
+#[cfg(test)]
+mod test {
+    use crate::{sha256, Hash};
+
+    #[test]
+    fn hash_as_ref_array() {
+        let hash = sha256::Hash::hash(&[3, 50]);
+        let r = AsRef::<[u8; 32]>::as_ref(&hash);
+        assert_eq!(r, hash.as_byte_array());
+    }
+
+    #[test]
+    fn hash_as_ref_slice() {
+        let hash = sha256::Hash::hash(&[3, 50]);
+        let r = AsRef::<[u8]>::as_ref(&hash);
+        assert_eq!(r, hash.as_byte_array());
+    }
+
+    #[test]
+    fn hash_borrow() {
+        use core::borrow::Borrow;
+
+        let hash = sha256::Hash::hash(&[3, 50]);
+        let borrowed: &[u8] = hash.borrow();
+        assert_eq!(borrowed, hash.as_byte_array());
+    }
+
+    hash_newtype! {
+        /// Test hash.
+        struct TestHash(crate::sha256d::Hash);
+    }
+
+    #[test]
+    fn display() {
+        let want = "0000000000000000000000000000000000000000000000000000000000000000";
+        let got = format!("{}", TestHash::all_zeros());
+        assert_eq!(got, want)
+    }
+
+    #[test]
+    fn display_alternate() {
+        let want = "0x0000000000000000000000000000000000000000000000000000000000000000";
+        let got = format!("{:#}", TestHash::all_zeros());
+        assert_eq!(got, want)
+    }
+
+    #[test]
+    fn lower_hex() {
+        let want = "0000000000000000000000000000000000000000000000000000000000000000";
+        let got = format!("{:x}", TestHash::all_zeros());
+        assert_eq!(got, want)
+    }
+
+    #[test]
+    fn lower_hex_alternate() {
+        let want = "0x0000000000000000000000000000000000000000000000000000000000000000";
+        let got = format!("{:#x}", TestHash::all_zeros());
+        assert_eq!(got, want)
+    }
+
+    #[test]
+    fn inner_hash_as_ref_array() {
+        let hash = TestHash::all_zeros();
+        let r = AsRef::<[u8; 32]>::as_ref(&hash);
+        assert_eq!(r, hash.as_byte_array());
+    }
+
+    #[test]
+    fn inner_hash_as_ref_slice() {
+        let hash = TestHash::all_zeros();
+        let r = AsRef::<[u8]>::as_ref(&hash);
+        assert_eq!(r, hash.as_byte_array());
+    }
+}
diff --git a/internals/CHANGELOG.md b/internals/CHANGELOG.md
new file mode 100644
index 000000000..a5adaaa58
--- /dev/null
+++ b/internals/CHANGELOG.md
@@ -0,0 +1,5 @@
+# 0.1.0 - 2023-03-08
+
+Split this crate out from the [rust-bitcoin](https://github.com/rust-bitcoin/rust-bitcoin) crate.
+For previous development history see the original
+[CHANGELOG](https://github.com/rust-bitcoin/rust-bitcoin/blob/master/bitcoin/CHANGELOG.md) file.
diff --git a/internals/Cargo.toml b/internals/Cargo.toml
new file mode 100644
index 000000000..3f89d5027
--- /dev/null
+++ b/internals/Cargo.toml
@@ -0,0 +1,26 @@
+[package]
+name = "dashcore-private"
+version = "0.1.0"
+authors = ["Samuel Westrich <sam@dash.org>", "The Rust Dash developers"]
+license = "CC0-1.0"
+repository = "https://github.com/rust-dashcore/rust-dashcore/"
+documentation = "https://docs.rs/dash-private"
+description = "Internal types and macros used by rust-dash ecosystem"
+categories = ["cryptography::cryptocurrencies"]
+keywords = ["internal"]
+readme = "README.md"
+edition = "2018"
+exclude = ["tests", "contrib"]
+
+[features]
+default = []
+std = ["alloc"]
+alloc = []
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[dependencies]
+
+[dev-dependencies]
diff --git a/internals/README.md b/internals/README.md
new file mode 100644
index 000000000..b7c2b903c
--- /dev/null
+++ b/internals/README.md
@@ -0,0 +1,7 @@
+Rust Dash Internals
+======================
+
+This crate is only meant to be used internally by crates in the
+[rust-dash](https://github.com/rust-dash) ecosystem.
+
+This crate will never be stabilized, depend on it at your own risk.
diff --git a/internals/build.rs b/internals/build.rs
new file mode 100644
index 000000000..6f366409e
--- /dev/null
+++ b/internals/build.rs
@@ -0,0 +1,34 @@
+fn main() {
+    let rustc = std::env::var_os("RUSTC");
+    let rustc = rustc.as_ref().map(std::path::Path::new).unwrap_or_else(|| "rustc".as_ref());
+    let output = std::process::Command::new(rustc)
+        .arg("--version")
+        .output()
+        .unwrap_or_else(|error| panic!("Failed to run `{:?} --version`: {:?}", rustc, error));
+    assert!(output.status.success(), "{:?} -- version returned non-zero exit code", rustc);
+    let stdout = String::from_utf8(output.stdout).expect("rustc produced non-UTF-8 output");
+    let version_prefix = "rustc ";
+    if !stdout.starts_with(version_prefix) {
+        panic!("unexpected rustc output: {}", stdout);
+    }
+
+    let version = &stdout[version_prefix.len()..];
+    let end = version.find(&[' ', '-'] as &[_]).unwrap_or(version.len());
+    let version = &version[..end];
+    let mut version_components = version.split('.');
+    let major = version_components.next().unwrap();
+    assert_eq!(major, "1", "Unexpected Rust major version");
+    let minor = version_components
+        .next()
+        .unwrap_or("0")
+        .parse::<u64>()
+        .expect("invalid Rust minor version");
+
+    // print cfg for all interesting versions less than or equal to minor
+    // 46 adds `track_caller`
+    for version in &[46] {
+        if *version <= minor {
+            println!("cargo:rustc-cfg=rust_v_1_{}", version);
+        }
+    }
+}
diff --git a/internals/contrib/test.sh b/internals/contrib/test.sh
new file mode 100755
index 000000000..13f2d3d8a
--- /dev/null
+++ b/internals/contrib/test.sh
@@ -0,0 +1,64 @@
+#!/bin/sh
+
+set -ex
+
+FEATURES="std alloc"
+
+cargo --version
+rustc --version
+
+# Work out if we are using a nightly toolchain.
+NIGHTLY=false
+if cargo --version | grep nightly >/dev/null; then
+    NIGHTLY=true
+fi
+
+# Make all cargo invocations verbose
+export CARGO_TERM_VERBOSE=true
+
+# Defaults / sanity checks
+cargo build
+cargo test
+
+if [ "$DO_LINT" = true ]
+then
+    cargo clippy --all-features --all-targets -- -D warnings
+fi
+
+if [ "$DO_FEATURE_MATRIX" = true ]; then
+    # No features
+    cargo build --no-default-features
+    cargo test --no-default-features
+
+    # All features
+    cargo build --no-default-features --features="$FEATURES"
+    cargo test --no-default-features --features="$FEATURES"
+
+    # Single features
+    for feature in ${FEATURES}
+    do
+        cargo build --no-default-features --features="$feature"
+        cargo test --no-default-features --features="$feature"
+    done
+fi
+
+# Build the docs if told to (this only works with the nightly toolchain)
+if [ "$DO_DOCSRS" = true ]; then
+    RUSTDOCFLAGS="--cfg docsrs -D warnings -D rustdoc::broken-intra-doc-links" cargo +nightly doc --all-features
+fi
+
+# Build the docs with a stable toolchain, in unison with the DO_DOCSRS command
+# above this checks that we feature guarded docs imports correctly.
+if [ "$DO_DOCS" = true ]; then
+    RUSTDOCFLAGS="-D warnings" cargo +stable doc --all-features
+fi
+
+# Run formatter if told to.
+if [ "$DO_FMT" = true ]; then
+    if [ "$NIGHTLY" = false ]; then
+        echo "DO_FMT requires a nightly toolchain (consider using RUSTUP_TOOLCHAIN)"
+        exit 1
+    fi
+    rustup component add rustfmt
+    cargo fmt --check
+fi
diff --git a/internals/src/error.rs b/internals/src/error.rs
new file mode 100644
index 000000000..2f2133770
--- /dev/null
+++ b/internals/src/error.rs
@@ -0,0 +1,29 @@
+// Written by the Rust Bitcoin developers.
+// SPDX-License-Identifier: CC0-1.0
+
+//! # Error
+//!
+//! Error handling macros and helpers.
+//!
+
+/// Formats error.
+///
+/// If `std` feature is OFF appends error source (delimited by `: `). We do this because
+/// `e.source()` is only available in std builds, without this macro the error source is lost for
+/// no-std builds.
+#[macro_export]
+macro_rules! write_err {
+    ($writer:expr, $string:literal $(, $args:expr)*; $source:expr) => {
+        {
+            #[cfg(feature = "std")]
+            {
+                let _ = &$source;   // Prevents clippy warnings.
+                write!($writer, $string $(, $args)*)
+            }
+            #[cfg(not(feature = "std"))]
+            {
+                write!($writer, concat!($string, ": {}") $(, $args)*, $source)
+            }
+        }
+    }
+}
diff --git a/internals/src/hex/buf_encoder.rs b/internals/src/hex/buf_encoder.rs
new file mode 100644
index 000000000..c879c5cb5
--- /dev/null
+++ b/internals/src/hex/buf_encoder.rs
@@ -0,0 +1,394 @@
+//! Implements a buffered encoder.
+//!
+//! The main type of this module is [`BufEncoder`] which provides buffered hex encoding. Such is
+//! faster than the usual `write!(f, "{02x}", b)?` in a for loop because it reduces dynamic
+//! dispatch and decreases the number of allocations if a `String` is being created.
+
+use core::borrow::Borrow;
+
+pub use out_bytes::OutBytes;
+
+use super::Case;
+
+/// Trait for types that can be soundly converted to `OutBytes`.
+///
+/// To protect the API from future breakage this sealed trait guards which types can be used with
+/// the `Encoder`. Currently it is implemented for byte arrays of various interesting lengths.
+///
+/// ## Safety
+///
+/// This is not `unsafe` yet but the `as_out_bytes` should always return the same reference if the
+/// same reference is supplied. IOW the returned memory address and length should be the same if
+/// the input memory address and length are the same.
+///
+/// If the trait ever becomes `unsafe` this will be required for soundness.
+pub trait AsOutBytes: out_bytes::Sealed {
+    /// Performs the conversion.
+    fn as_out_bytes(&self) -> &OutBytes;
+
+    /// Performs the conversion.
+    fn as_mut_out_bytes(&mut self) -> &mut OutBytes;
+}
+
+/// A buffer with compile-time-known length.
+///
+/// This is essentially `Default + AsOutBytes` but supports lengths 1.41 doesn't.
+pub trait FixedLenBuf: Sized + AsOutBytes {
+    /// Creates an uninitialized buffer.
+    ///
+    /// The current implementtions initialize the buffer with zeroes but it should be treated a
+    /// uninitialized anyway.
+    fn uninit() -> Self;
+}
+
+/// Implements `OutBytes`
+///
+/// This prevents the rest of the crate from accessing the field of `OutBytes`.
+mod out_bytes {
+    use super::AsOutBytes;
+
+    /// A byte buffer that can only be written-into.
+    ///
+    /// You shouldn't concern yourself with this, just call `BufEncoder::new` with your array.
+    ///
+    /// This prepares the API for potential future support of `[MaybeUninit<u8>]`. We don't want to use
+    /// `unsafe` until it's proven to be needed but if it does we have an easy, compatible upgrade
+    /// option.
+    ///
+    /// Warning: `repr(transparent)` is an internal implementation detail and **must not** be
+    /// relied on!
+    #[repr(transparent)]
+    pub struct OutBytes([u8]);
+
+    impl OutBytes {
+        /// Returns the first `len` bytes as initialized.
+        ///
+        /// Not `unsafe` because we don't use `unsafe` (yet).
+        ///
+        /// ## Panics
+        ///
+        /// The method panics if `len` is out of bounds.
+        #[track_caller]
+        pub(crate) fn assume_init(&self, len: usize) -> &[u8] { &self.0[..len] }
+
+        /// Writes given bytes into the buffer.
+        ///
+        /// ## Panics
+        ///
+        /// The method panics if pos is out of bounds or `bytes` don't fit into the buffer.
+        #[track_caller]
+        pub(crate) fn write(&mut self, pos: usize, bytes: &[u8]) {
+            self.0[pos..(pos + bytes.len())].copy_from_slice(bytes);
+        }
+
+        /// Returns the length of the buffer.
+        pub(crate) fn len(&self) -> usize { self.0.len() }
+
+        fn from_bytes(slice: &[u8]) -> &Self {
+            // SAFETY: copied from std
+            // conversion of reference to pointer of the same referred type is always sound,
+            // including in unsized types.
+            // Thanks to repr(transparent) the types have the same layout making the other
+            // conversion sound.
+            // The pointer was just created from a reference that's still alive so dereferencing is
+            // sound.
+            unsafe { &*(slice as *const [u8] as *const Self) }
+        }
+
+        fn from_mut_bytes(slice: &mut [u8]) -> &mut Self {
+            // SAFETY: copied from std
+            // conversion of reference to pointer of the same referred type is always sound,
+            // including in unsized types.
+            // Thanks to repr(transparent) the types have the same layout making the other
+            // conversion sound.
+            // The pointer was just created from a reference that's still alive so dereferencing is
+            // sound.
+            unsafe { &mut *(slice as *mut [u8] as *mut Self) }
+        }
+    }
+
+    macro_rules! impl_from_array {
+        ($($len:expr),* $(,)?) => {
+            $(
+                impl super::FixedLenBuf for [u8; $len] {
+                    fn uninit() -> Self {
+                        [0u8; $len]
+                    }
+                }
+
+                impl AsOutBytes for [u8; $len] {
+                    fn as_out_bytes(&self) -> &OutBytes {
+                        OutBytes::from_bytes(self)
+                    }
+
+                    fn as_mut_out_bytes(&mut self) -> &mut OutBytes {
+                        OutBytes::from_mut_bytes(self)
+                    }
+                }
+
+                impl Sealed for [u8; $len] {}
+
+                impl<'a> super::super::display::DisplayHex for &'a [u8; $len / 2] {
+                    type Display = super::super::display::DisplayArray<core::slice::Iter<'a, u8>, [u8; $len]>;
+                    fn as_hex(self) -> Self::Display {
+                        super::super::display::DisplayArray::new(self.iter())
+                    }
+
+                    fn hex_reserve_suggestion(self) -> usize {
+                        $len
+                    }
+                }
+            )*
+        }
+    }
+
+    impl<T: AsOutBytes + ?Sized> AsOutBytes for &'_ mut T {
+        fn as_out_bytes(&self) -> &OutBytes { (**self).as_out_bytes() }
+
+        fn as_mut_out_bytes(&mut self) -> &mut OutBytes { (**self).as_mut_out_bytes() }
+    }
+
+    impl<T: AsOutBytes + ?Sized> Sealed for &'_ mut T {}
+
+    impl AsOutBytes for OutBytes {
+        fn as_out_bytes(&self) -> &OutBytes { self }
+
+        fn as_mut_out_bytes(&mut self) -> &mut OutBytes { self }
+    }
+
+    impl Sealed for OutBytes {}
+
+    // As a sanity check we only provide conversions for even, non-empty arrays.
+    // Weird lengths 66 and 130 are provided for serialized public keys.
+    impl_from_array!(
+        2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 40, 48, 64, 66, 96, 128, 130, 192, 256, 512,
+        1024, 2048, 4096, 8192
+    );
+
+    /// Prevents outside crates from implementing the trait
+    pub trait Sealed {}
+}
+
+/// Hex-encodes bytes into the provided buffer.
+///
+/// This is an important building block for fast hex-encoding. Because string writing tools
+/// provided by `core::fmt` involve dynamic dispatch and don't allow reserving capacity in strings
+/// buffering the hex and then formatting it is significantly faster.
+pub struct BufEncoder<T: AsOutBytes> {
+    buf: T,
+    pos: usize,
+}
+
+impl<T: AsOutBytes> BufEncoder<T> {
+    /// Creates an empty `BufEncoder`.
+    ///
+    /// This is usually used with uninitialized (zeroed) byte array allocated on stack.
+    /// This can only be constructed with an even-length, non-empty array.
+    #[inline]
+    pub fn new(buf: T) -> Self { BufEncoder { buf, pos: 0 } }
+
+    /// Encodes `byte` as hex in given `case` and appends it to the buffer.
+    ///
+    /// ## Panics
+    ///
+    /// The method panics if the buffer is full.
+    #[inline]
+    #[track_caller]
+    pub fn put_byte(&mut self, byte: u8, case: Case) {
+        self.buf.as_mut_out_bytes().write(self.pos, &super::byte_to_hex(byte, case.table()));
+        self.pos += 2;
+    }
+
+    /// Encodes `bytes` as hex in given `case` and appends them to the buffer.
+    ///
+    /// ## Panics
+    ///
+    /// The method panics if the bytes wouldn't fit the buffer.
+    #[inline]
+    #[track_caller]
+    pub fn put_bytes<I>(&mut self, bytes: I, case: Case)
+    where
+        I: IntoIterator,
+        I::Item: Borrow<u8>,
+    {
+        self.put_bytes_inner(bytes.into_iter(), case)
+    }
+
+    #[inline]
+    #[track_caller]
+    fn put_bytes_inner<I>(&mut self, bytes: I, case: Case)
+    where
+        I: Iterator,
+        I::Item: Borrow<u8>,
+    {
+        // May give the compiler better optimization opportunity
+        if let Some(max) = bytes.size_hint().1 {
+            assert!(max <= self.space_remaining());
+        }
+        for byte in bytes {
+            self.put_byte(*byte.borrow(), case);
+        }
+    }
+
+    /// Encodes as many `bytes` as fit into the buffer as hex and return the remainder.
+    ///
+    /// This method works just like `put_bytes` but instead of panicking it returns the unwritten
+    /// bytes. The method returns an empty slice if all bytes were written
+    #[must_use = "this may write only part of the input buffer"]
+    #[inline]
+    #[track_caller]
+    pub fn put_bytes_min<'a>(&mut self, bytes: &'a [u8], case: Case) -> &'a [u8] {
+        let to_write = self.space_remaining().min(bytes.len());
+        self.put_bytes(&bytes[..to_write], case);
+        &bytes[to_write..]
+    }
+
+    /// Returns true if no more bytes can be written into the buffer.
+    #[inline]
+    pub fn is_full(&self) -> bool { self.pos == self.buf.as_out_bytes().len() }
+
+    /// Returns the written bytes as a hex `str`.
+    #[inline]
+    pub fn as_str(&self) -> &str {
+        core::str::from_utf8(self.buf.as_out_bytes().assume_init(self.pos))
+            .expect("we only write ASCII")
+    }
+
+    /// Resets the buffer to become empty.
+    #[inline]
+    pub fn clear(&mut self) { self.pos = 0; }
+
+    /// How many bytes can be written to this buffer.
+    ///
+    /// Note that this returns the number of bytes before encoding, not number of hex digits.
+    #[inline]
+    pub fn space_remaining(&self) -> usize { (self.buf.as_out_bytes().len() - self.pos) / 2 }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn empty() {
+        let mut buf = [0u8; 2];
+        let encoder = BufEncoder::new(&mut buf);
+        assert_eq!(encoder.as_str(), "");
+        assert!(!encoder.is_full());
+    }
+
+    #[test]
+    fn single_byte_exact_buf() {
+        let mut buf = [0u8; 2];
+        let mut encoder = BufEncoder::new(&mut buf);
+        assert_eq!(encoder.space_remaining(), 1);
+        encoder.put_byte(42, Case::Lower);
+        assert_eq!(encoder.as_str(), "2a");
+        assert_eq!(encoder.space_remaining(), 0);
+        assert!(encoder.is_full());
+        encoder.clear();
+        assert_eq!(encoder.space_remaining(), 1);
+        assert!(!encoder.is_full());
+        encoder.put_byte(42, Case::Upper);
+        assert_eq!(encoder.as_str(), "2A");
+        assert_eq!(encoder.space_remaining(), 0);
+        assert!(encoder.is_full());
+    }
+
+    #[test]
+    fn single_byte_oversized_buf() {
+        let mut buf = [0u8; 4];
+        let mut encoder = BufEncoder::new(&mut buf);
+        assert_eq!(encoder.space_remaining(), 2);
+        encoder.put_byte(42, Case::Lower);
+        assert_eq!(encoder.space_remaining(), 1);
+        assert_eq!(encoder.as_str(), "2a");
+        assert!(!encoder.is_full());
+        encoder.clear();
+        assert_eq!(encoder.space_remaining(), 2);
+        encoder.put_byte(42, Case::Upper);
+        assert_eq!(encoder.as_str(), "2A");
+        assert_eq!(encoder.space_remaining(), 1);
+        assert!(!encoder.is_full());
+    }
+
+    #[test]
+    fn two_bytes() {
+        let mut buf = [0u8; 4];
+        let mut encoder = BufEncoder::new(&mut buf);
+        encoder.put_byte(42, Case::Lower);
+        assert_eq!(encoder.space_remaining(), 1);
+        encoder.put_byte(255, Case::Lower);
+        assert_eq!(encoder.space_remaining(), 0);
+        assert_eq!(encoder.as_str(), "2aff");
+        assert!(encoder.is_full());
+        encoder.clear();
+        assert!(!encoder.is_full());
+        encoder.put_byte(42, Case::Upper);
+        encoder.put_byte(255, Case::Upper);
+        assert_eq!(encoder.as_str(), "2AFF");
+        assert!(encoder.is_full());
+    }
+
+    #[test]
+    fn put_bytes_min() {
+        let mut buf = [0u8; 2];
+        let mut encoder = BufEncoder::new(&mut buf);
+        let remainder = encoder.put_bytes_min(b"", Case::Lower);
+        assert_eq!(remainder, b"");
+        assert_eq!(encoder.as_str(), "");
+        let remainder = encoder.put_bytes_min(b"*", Case::Lower);
+        assert_eq!(remainder, b"");
+        assert_eq!(encoder.as_str(), "2a");
+        encoder.clear();
+        let remainder = encoder.put_bytes_min(&[42, 255], Case::Lower);
+        assert_eq!(remainder, &[255]);
+        assert_eq!(encoder.as_str(), "2a");
+    }
+
+    #[test]
+    fn same_as_fmt() {
+        use core::fmt::{self, Write};
+
+        struct Writer {
+            buf: [u8; 2],
+            pos: usize,
+        }
+
+        impl Writer {
+            fn as_str(&self) -> &str { core::str::from_utf8(&self.buf[..self.pos]).unwrap() }
+        }
+
+        impl Write for Writer {
+            fn write_str(&mut self, s: &str) -> fmt::Result {
+                assert!(self.pos <= 2);
+                if s.len() > 2 - self.pos {
+                    Err(fmt::Error)
+                } else {
+                    self.buf[self.pos..(self.pos + s.len())].copy_from_slice(s.as_bytes());
+                    self.pos += s.len();
+                    Ok(())
+                }
+            }
+        }
+
+        let mut writer = Writer { buf: [0u8; 2], pos: 0 };
+        let mut buf = [0u8; 2];
+        let mut encoder = BufEncoder::new(&mut buf);
+
+        for i in 0..=255 {
+            write!(writer, "{:02x}", i).unwrap();
+            encoder.put_byte(i, Case::Lower);
+            assert_eq!(encoder.as_str(), writer.as_str());
+            writer.pos = 0;
+            encoder.clear();
+        }
+        for i in 0..=255 {
+            write!(writer, "{:02X}", i).unwrap();
+            encoder.put_byte(i, Case::Upper);
+            assert_eq!(encoder.as_str(), writer.as_str());
+            writer.pos = 0;
+            encoder.clear();
+        }
+    }
+}
diff --git a/internals/src/hex/display.rs b/internals/src/hex/display.rs
new file mode 100644
index 000000000..81450d00a
--- /dev/null
+++ b/internals/src/hex/display.rs
@@ -0,0 +1,301 @@
+//! Helpers for displaying bytes as hex strings.
+//!
+//! This module provides a trait for displaying things as hex as well as an implementation for
+//! `&[u8]`.
+
+use core::borrow::Borrow;
+use core::fmt;
+
+use super::buf_encoder::{BufEncoder, OutBytes};
+use super::Case;
+use crate::hex::buf_encoder::FixedLenBuf;
+#[cfg(feature = "alloc")]
+use crate::prelude::*;
+
+/// Extension trait for types that can be displayed as hex.
+///
+/// Types that have a single, obvious text representation being hex should **not** implement this
+/// trait and simply implement `Display` instead.
+///
+/// This trait should be generally implemented for references only. We would prefer to use GAT but
+/// that is beyond our MSRV. As a lint we require the `IsRef` trait which is implemented for all
+/// references.
+pub trait DisplayHex: Copy + sealed::IsRef {
+    /// The type providing [`fmt::Display`] implementation.
+    ///
+    /// This is usually a wrapper type holding a reference to `Self`.
+    type Display: fmt::LowerHex + fmt::UpperHex;
+
+    /// Display `Self` as a continuous sequence of ASCII hex chars.
+    fn as_hex(self) -> Self::Display;
+
+    /// Create a lower-hex-encoded string.
+    ///
+    /// A shorthand for `to_hex_string(Case::Lower)`, so that `Case` doesn't need to be imported.
+    ///
+    /// This may be faster than `.display_hex().to_string()` because it uses `reserve_suggestion`.
+    #[cfg(feature = "alloc")]
+    fn to_lower_hex_string(self) -> String { self.to_hex_string(Case::Lower) }
+
+    /// Create an upper-hex-encoded string.
+    ///
+    /// A shorthand for `to_hex_string(Case::Upper)`, so that `Case` doesn't need to be imported.
+    ///
+    /// This may be faster than `.display_hex().to_string()` because it uses `reserve_suggestion`.
+    #[cfg(feature = "alloc")]
+    fn to_upper_hex_string(self) -> String { self.to_hex_string(Case::Upper) }
+
+    /// Create a hex-encoded string.
+    ///
+    /// This may be faster than `.display_hex().to_string()` because it uses `reserve_suggestion`.
+    #[cfg(feature = "alloc")]
+    fn to_hex_string(self, case: Case) -> String {
+        let mut string = String::new();
+        self.append_hex_to_string(case, &mut string);
+        string
+    }
+
+    /// Appends hex-encoded content to an existing `String`.
+    ///
+    /// This may be faster than `write!(string, "{:x}", self.display_hex())` because it uses
+    /// `reserve_sugggestion`.
+    #[cfg(feature = "alloc")]
+    fn append_hex_to_string(self, case: Case, string: &mut String) {
+        use fmt::Write;
+
+        string.reserve(self.hex_reserve_suggestion());
+        match case {
+            Case::Lower => write!(string, "{:x}", self.as_hex()),
+            Case::Upper => write!(string, "{:X}", self.as_hex()),
+        }
+        .unwrap_or_else(|_| {
+            let name = core::any::type_name::<Self::Display>();
+            // We don't expect `std` to ever be buggy, so the bug is most likely in the `Display`
+            // impl of `Self::Display`.
+            panic!("The implementation of Display for {} returned an error when it shouldn't", name)
+        })
+    }
+
+    /// Hints how much bytes to reserve when creating a `String`.
+    ///
+    /// Implementors that know the number of produced bytes upfront should override this.
+    /// Defaults to 0.
+    ///
+    // We prefix the name with `hex_` to avoid potential collision with other methods.
+    fn hex_reserve_suggestion(self) -> usize { 0 }
+}
+
+mod sealed {
+    /// Trait marking a shared reference.
+    pub trait IsRef: Copy {}
+
+    impl<T: ?Sized> IsRef for &'_ T {}
+}
+
+impl<'a> DisplayHex for &'a [u8] {
+    type Display = DisplayByteSlice<'a>;
+
+    #[inline]
+    fn as_hex(self) -> Self::Display { DisplayByteSlice { bytes: self } }
+
+    #[inline]
+    fn hex_reserve_suggestion(self) -> usize {
+        // Since the string wouldn't fit into address space if this overflows (actually even for
+        // smaller amounts) it's better to panic right away. It should also give the optimizer
+        // better opportunities.
+        self.len().checked_mul(2).expect("the string wouldn't fit into address space")
+    }
+}
+
+#[cfg(feature = "alloc")]
+impl<'a> DisplayHex for &'a alloc::vec::Vec<u8> {
+    type Display = DisplayByteSlice<'a>;
+
+    #[inline]
+    fn as_hex(self) -> Self::Display { DisplayByteSlice { bytes: self } }
+
+    #[inline]
+    fn hex_reserve_suggestion(self) -> usize {
+        // Since the string wouldn't fit into address space if this overflows (actually even for
+        // smaller amounts) it's better to panic right away. It should also give the optimizer
+        // better opportunities.
+        self.len().checked_mul(2).expect("the string wouldn't fit into address space")
+    }
+}
+
+/// Displays byte slice as hex.
+///
+/// Created by [`<&[u8] as DisplayHex>::as_hex`](DisplayHex::as_hex).
+pub struct DisplayByteSlice<'a> {
+    // pub because we want to keep lengths in sync
+    pub(crate) bytes: &'a [u8],
+}
+
+impl<'a> DisplayByteSlice<'a> {
+    fn display(&self, f: &mut fmt::Formatter, case: Case) -> fmt::Result {
+        let mut buf = [0u8; 1024];
+        let mut encoder = super::BufEncoder::new(&mut buf);
+
+        let mut chunks = self.bytes.chunks_exact(512);
+        for chunk in &mut chunks {
+            encoder.put_bytes(chunk, case);
+            f.write_str(encoder.as_str())?;
+            encoder.clear();
+        }
+        encoder.put_bytes(chunks.remainder(), case);
+        f.write_str(encoder.as_str())
+    }
+}
+
+impl<'a> fmt::LowerHex for DisplayByteSlice<'a> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { self.display(f, Case::Lower) }
+}
+
+impl<'a> fmt::UpperHex for DisplayByteSlice<'a> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { self.display(f, Case::Upper) }
+}
+
+/// Displays byte array as hex.
+///
+/// Created by [`<&[u8; LEN] as DisplayHex>::as_hex`](DisplayHex::as_hex).
+pub struct DisplayArray<A: Clone + IntoIterator, B: FixedLenBuf>
+where
+    A::Item: Borrow<u8>,
+{
+    array: A,
+    _buffer_marker: core::marker::PhantomData<B>,
+}
+
+impl<A: Clone + IntoIterator, B: FixedLenBuf> DisplayArray<A, B>
+where
+    A::Item: Borrow<u8>,
+{
+    /// Creates the wrapper.
+    pub fn new(array: A) -> Self { DisplayArray { array, _buffer_marker: Default::default() } }
+
+    fn display(&self, f: &mut fmt::Formatter, case: Case) -> fmt::Result {
+        let mut buf = B::uninit();
+        let mut encoder = super::BufEncoder::new(&mut buf);
+        encoder.put_bytes(self.array.clone(), case);
+        f.pad_integral(true, "0x", encoder.as_str())
+    }
+}
+
+impl<A: Clone + IntoIterator, B: FixedLenBuf> fmt::LowerHex for DisplayArray<A, B>
+where
+    A::Item: Borrow<u8>,
+{
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { self.display(f, Case::Lower) }
+}
+
+impl<A: Clone + IntoIterator, B: FixedLenBuf> fmt::UpperHex for DisplayArray<A, B>
+where
+    A::Item: Borrow<u8>,
+{
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { self.display(f, Case::Upper) }
+}
+
+/// Format known-length array as hex.
+///
+/// This supports all formatting options of formatter and may be faster than calling
+/// `display_as_hex()` on an arbitrary `&[u8]`. Note that the implementation intentionally keeps
+/// leading zeros even when not requested. This is designed to display values such as hashes and
+/// keys and removing leading zeros would be confusing.
+///
+/// ## Parameters
+///
+/// * `$formatter` - a [`fmt::Formatter`].
+/// * `$len` known length of `$bytes`, must be a const expression.
+/// * `$bytes` - bytes to be encoded, most likely a reference to an array.
+/// * `$case` - value of type [`Case`] determining whether to format as lower or upper case.
+///
+/// ## Panics
+///
+/// This macro panics if `$len` is not equal to `$bytes.len()`. It also fails to compile if `$len`
+/// is more than half of `usize::MAX`.
+#[macro_export]
+macro_rules! fmt_hex_exact {
+    ($formatter:expr, $len:expr, $bytes:expr, $case:expr) => {{
+        // statically check $len
+        #[allow(deprecated)]
+        const _: () = [()][($len > usize::max_value() / 2) as usize];
+        assert_eq!($bytes.len(), $len);
+        let mut buf = [0u8; $len * 2];
+        let buf = $crate::hex::buf_encoder::AsOutBytes::as_mut_out_bytes(&mut buf);
+        $crate::hex::display::fmt_hex_exact_fn($formatter, buf, $bytes, $case)
+    }};
+}
+pub use fmt_hex_exact;
+
+// Implementation detail of `write_hex_exact` macro to de-duplicate the code
+#[doc(hidden)]
+#[inline]
+pub fn fmt_hex_exact_fn<I>(
+    f: &mut fmt::Formatter,
+    buf: &mut OutBytes,
+    bytes: I,
+    case: Case,
+) -> fmt::Result
+where
+    I: IntoIterator,
+    I::Item: Borrow<u8>,
+{
+    let mut encoder = BufEncoder::new(buf);
+    encoder.put_bytes(bytes, case);
+    f.pad_integral(true, "0x", encoder.as_str())
+}
+
+#[cfg(test)]
+mod tests {
+    #[cfg(feature = "alloc")]
+    use super::*;
+
+    #[cfg(feature = "alloc")]
+    mod alloc {
+        use super::*;
+
+        fn check_encoding(bytes: &[u8]) {
+            use core::fmt::Write;
+
+            let s1 = bytes.to_lower_hex_string();
+            let mut s2 = String::with_capacity(bytes.len() * 2);
+            for b in bytes {
+                write!(s2, "{:02x}", b).unwrap();
+            }
+            assert_eq!(s1, s2);
+        }
+
+        #[test]
+        fn empty() { check_encoding(b""); }
+
+        #[test]
+        fn single() { check_encoding(b"*"); }
+
+        #[test]
+        fn two() { check_encoding(b"*x"); }
+
+        #[test]
+        fn just_below_boundary() { check_encoding(&[42; 512]); }
+
+        #[test]
+        fn just_above_boundary() { check_encoding(&[42; 513]); }
+
+        #[test]
+        fn just_above_double_boundary() { check_encoding(&[42; 1025]); }
+
+        #[test]
+        fn fmt_exact_macro() {
+            use crate::alloc::string::ToString;
+
+            struct Dummy([u8; 32]);
+
+            impl fmt::Display for Dummy {
+                fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+                    fmt_hex_exact!(f, 32, &self.0, Case::Lower)
+                }
+            }
+
+            assert_eq!(Dummy([42; 32]).to_string(), "2a".repeat(32));
+        }
+    }
+}
diff --git a/internals/src/hex/mod.rs b/internals/src/hex/mod.rs
new file mode 100644
index 000000000..0d55ec8e7
--- /dev/null
+++ b/internals/src/hex/mod.rs
@@ -0,0 +1,52 @@
+//! Helpers for encoding bytes as hex strings.
+
+pub mod buf_encoder;
+pub mod display;
+
+pub use buf_encoder::BufEncoder;
+
+/// Reexports of extension traits.
+pub mod exts {
+    pub use super::display::DisplayHex;
+}
+
+/// Possible case of hex.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+pub enum Case {
+    /// Produce lower-case chars (`[0-9a-f]`).
+    ///
+    /// This is the default.
+    Lower,
+
+    /// Produce upper-case chars (`[0-9A-F]`).
+    Upper,
+}
+
+impl Default for Case {
+    fn default() -> Self { Case::Lower }
+}
+
+impl Case {
+    /// Returns the encoding table.
+    ///
+    /// The returned table may only contain displayable ASCII chars.
+    #[inline]
+    #[rustfmt::skip]
+    pub(crate) fn table(self) -> &'static [u8; 16] {
+        static LOWER: [u8; 16] = [b'0', b'1', b'2', b'3', b'4', b'5', b'6', b'7', b'8', b'9', b'a', b'b', b'c', b'd', b'e', b'f'];
+        static UPPER: [u8; 16] = [b'0', b'1', b'2', b'3', b'4', b'5', b'6', b'7', b'8', b'9', b'A', b'B', b'C', b'D', b'E', b'F'];
+
+        match self {
+            Case::Lower => &LOWER,
+            Case::Upper => &UPPER,
+        }
+    }
+}
+
+/// Encodes single byte as two ASCII chars using the given table.
+///
+/// The function guarantees only returning values from the provided table.
+#[inline]
+pub(crate) fn byte_to_hex(byte: u8, table: &[u8; 16]) -> [u8; 2] {
+    [table[usize::from(byte.wrapping_shr(4))], table[usize::from(byte & 0x0F)]]
+}
diff --git a/internals/src/lib.rs b/internals/src/lib.rs
new file mode 100644
index 000000000..c4f439dc8
--- /dev/null
+++ b/internals/src/lib.rs
@@ -0,0 +1,30 @@
+// Written by the Rust Dash developers.
+// SPDX-License-Identifier: CC0-1.0
+
+//! # Rust DashCore Internal
+//!
+//! This crate is only meant to be used internally by crates in the
+//! [rust-dash](https://github.com/rust-dashcore) ecosystem.
+//!
+
+#![no_std]
+// Experimental features we need.
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+// Coding conventions
+#![warn(missing_docs)]
+
+#[cfg(feature = "alloc")]
+extern crate alloc;
+
+#[cfg(feature = "std")]
+extern crate std;
+
+pub mod error;
+pub mod hex;
+pub mod macros;
+
+/// Mainly reexports based on features.
+pub(crate) mod prelude {
+    #[cfg(feature = "alloc")]
+    pub(crate) use alloc::string::String;
+}
diff --git a/internals/src/macros.rs b/internals/src/macros.rs
new file mode 100644
index 000000000..2df33c928
--- /dev/null
+++ b/internals/src/macros.rs
@@ -0,0 +1,113 @@
+//! Various macros used by the Rust Bitcoin ecosystem.
+//!
+
+/// Implements standard array methods for a given wrapper type.
+#[macro_export]
+macro_rules! impl_array_newtype {
+    ($thing:ident, $ty:ty, $len:literal) => {
+        impl $thing {
+            /// Converts the object to a raw pointer.
+            #[inline]
+            pub fn as_ptr(&self) -> *const $ty {
+                let &$thing(ref dat) = self;
+                dat.as_ptr()
+            }
+
+            /// Converts the object to a mutable raw pointer.
+            #[inline]
+            pub fn as_mut_ptr(&mut self) -> *mut $ty {
+                let &mut $thing(ref mut dat) = self;
+                dat.as_mut_ptr()
+            }
+
+            /// Returns the length of the object as an array.
+            #[inline]
+            pub fn len(&self) -> usize { $len }
+
+            /// Returns whether the object, as an array, is empty. Always false.
+            #[inline]
+            pub fn is_empty(&self) -> bool { false }
+        }
+
+        impl<'a> core::convert::From<[$ty; $len]> for $thing {
+            fn from(data: [$ty; $len]) -> Self { $thing(data) }
+        }
+
+        impl<'a> core::convert::From<&'a [$ty; $len]> for $thing {
+            fn from(data: &'a [$ty; $len]) -> Self { $thing(*data) }
+        }
+
+        impl<'a> core::convert::TryFrom<&'a [$ty]> for $thing {
+            type Error = core::array::TryFromSliceError;
+
+            fn try_from(data: &'a [$ty]) -> Result<Self, Self::Error> {
+                use core::convert::TryInto;
+
+                Ok($thing(data.try_into()?))
+            }
+        }
+
+        impl AsRef<[$ty; $len]> for $thing {
+            fn as_ref(&self) -> &[$ty; $len] { &self.0 }
+        }
+
+        impl AsMut<[$ty; $len]> for $thing {
+            fn as_mut(&mut self) -> &mut [$ty; $len] { &mut self.0 }
+        }
+
+        impl AsRef<[$ty]> for $thing {
+            fn as_ref(&self) -> &[$ty] { &self.0 }
+        }
+
+        impl AsMut<[$ty]> for $thing {
+            fn as_mut(&mut self) -> &mut [$ty] { &mut self.0 }
+        }
+
+        impl core::borrow::Borrow<[$ty; $len]> for $thing {
+            fn borrow(&self) -> &[$ty; $len] { &self.0 }
+        }
+
+        impl core::borrow::BorrowMut<[$ty; $len]> for $thing {
+            fn borrow_mut(&mut self) -> &mut [$ty; $len] { &mut self.0 }
+        }
+
+        // The following two are valid because `[T; N]: Borrow<[T]>`
+        impl core::borrow::Borrow<[$ty]> for $thing {
+            fn borrow(&self) -> &[$ty] { &self.0 }
+        }
+
+        impl core::borrow::BorrowMut<[$ty]> for $thing {
+            fn borrow_mut(&mut self) -> &mut [$ty] { &mut self.0 }
+        }
+
+        impl<I> core::ops::Index<I> for $thing
+        where
+            [$ty]: core::ops::Index<I>,
+        {
+            type Output = <[$ty] as core::ops::Index<I>>::Output;
+
+            #[inline]
+            fn index(&self, index: I) -> &Self::Output { &self.0[index] }
+        }
+    };
+}
+
+/// Implements `Debug` by calling through to `Display`.
+#[macro_export]
+macro_rules! debug_from_display {
+    ($thing:ident) => {
+        impl core::fmt::Debug for $thing {
+            fn fmt(&self, f: &mut core::fmt::Formatter) -> Result<(), core::fmt::Error> {
+                core::fmt::Display::fmt(self, f)
+            }
+        }
+    };
+}
+
+/// Asserts a boolean expression at compile time.
+#[macro_export]
+macro_rules! const_assert {
+    ($x:expr) => {{
+        const _: [(); 0 - !$x as usize] = [];
+    }};
+}
diff --git a/rustfmt.toml b/rustfmt.toml
index c7ad93baf..2c1047350 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1 +1,77 @@
-disable_all_formatting = true
+ignore = []
+hard_tabs = false
+tab_spaces = 4
+newline_style = "Auto"
+indent_style = "Block"
+
+max_width = 100 # This is number of characters.
+# `use_small_heuristics` is ignored if the granular width config values are explicitly set.
+use_small_heuristics = "Max"    # "Max" == All granular width settings same as `max_width`.
+# # Granular width configuration settings. These are percentages of `max_width`.
+# fn_call_width = 60
+# attr_fn_like_width = 70
+# struct_lit_width = 18
+# struct_variant_width = 35
+# array_width = 60
+# chain_width = 60
+# single_line_if_else_max_width = 50
+
+wrap_comments = false
+format_code_in_doc_comments = false
+comment_width = 100             # Default 80
+normalize_comments = false
+normalize_doc_attributes = false
+format_strings = false
+format_macro_matchers = false
+format_macro_bodies = true
+hex_literal_case = "Preserve"
+empty_item_single_line = true
+struct_lit_single_line = true
+fn_single_line = true           # Default false
+where_single_line = false
+imports_indent = "Block"
+imports_layout = "Mixed"
+imports_granularity = "Module"     # Default "Preserve"
+group_imports = "StdExternalCrate" # Default "Preserve"
+reorder_imports = true
+reorder_modules = true
+reorder_impl_items = false
+type_punctuation_density = "Wide"
+space_before_colon = false
+space_after_colon = true
+spaces_around_ranges = false
+binop_separator = "Front"
+remove_nested_parens = true
+combine_control_expr = true
+overflow_delimited_expr = false
+struct_field_align_threshold = 0
+enum_discrim_align_threshold = 0
+match_arm_blocks = false        # Default true
+match_arm_leading_pipes = "Never"
+force_multiline_blocks = false
+fn_params_layout = "Tall"
+brace_style = "SameLineWhere"
+control_brace_style = "AlwaysSameLine"
+trailing_semicolon = true
+trailing_comma = "Vertical"
+match_block_trailing_comma = false
+blank_lines_upper_bound = 1
+blank_lines_lower_bound = 0
+edition = "2018"
+version = "One"
+inline_attribute_width = 0
+format_generated_files = true
+merge_derives = true
+use_try_shorthand = false
+use_field_init_shorthand = false
+force_explicit_abi = true
+condense_wildcard_suffixes = false
+color = "Auto"
+unstable_features = false
+disable_all_formatting = false
+skip_children = false
+hide_parse_errors = false
+error_on_line_overflow = false
+error_on_unformatted = false
+emit_mode = "Files"
+make_backup = false
diff --git a/src/blockdata/block.rs b/src/blockdata/block.rs
deleted file mode 100644
index 506045d35..000000000
--- a/src/blockdata/block.rs
+++ /dev/null
@@ -1,569 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Bitcoin blocks.
-//!
-//! A block is a bundle of transactions with a proof-of-work attached,
-//! which commits to an earlier block to form the blockchain. This
-//! module describes structures and functions needed to describe
-//! these blocks and the blockchain.
-//!
-
-use prelude::*;
-
-use core::fmt;
-
-use util;
-use util::Error::{BlockBadTarget, BlockBadProofOfWork};
-use util::hash::dash_merkle_root;
-use hashes::{Hash, HashEngine};
-use hash_types::{Wtxid, BlockHash, TxMerkleNode, WitnessMerkleNode, WitnessCommitment};
-use util::uint::Uint256;
-use consensus::encode::Encodable;
-use network::constants::Network;
-use blockdata::transaction::Transaction;
-use blockdata::constants::{max_target, WITNESS_SCALE_FACTOR};
-use blockdata::script;
-use VarInt;
-
-/// A block header, which contains all the block's information except
-/// the actual transactions
-#[derive(Copy, PartialEq, Eq, Clone, Debug)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct BlockHeader {
-    /// The protocol version. Should always be 1.
-    pub version: i32,
-    /// Reference to the previous block in the chain.
-    pub prev_blockhash: BlockHash,
-    /// The root hash of the merkle tree of transactions in the block.
-    pub merkle_root: TxMerkleNode,
-    /// The timestamp of the block, as claimed by the miner.
-    pub time: u32,
-    /// The target value below which the blockhash must lie, encoded as a
-    /// a float (with well-defined rounding, of course).
-    pub bits: u32,
-    /// The nonce, selected to obtain a low enough blockhash.
-    pub nonce: u32,
-}
-
-impl_consensus_encoding!(BlockHeader, version, prev_blockhash, merkle_root, time, bits, nonce);
-
-impl BlockHeader {
-    /// Returns the block hash.
-    pub fn block_hash(&self) -> BlockHash {
-        let mut engine = BlockHash::engine();
-        self.consensus_encode(&mut engine).expect("engines don't error");
-        BlockHash::from_engine(engine)
-    }
-
-    /// Computes the target [0, T] that a blockhash must land in to be valid.
-    pub fn target(&self) -> Uint256 {
-        Self::u256_from_compact_target(self.bits)
-    }
-
-    /// Computes the target value in [`Uint256`] format, from a compact representation.
-    ///
-    /// [`Uint256`]: ../../util/uint/struct.Uint256.html
-    ///
-    /// ```
-    /// use dashcore::blockdata::block::BlockHeader;
-    ///
-    /// assert_eq!(0x1d00ffff,
-    ///     BlockHeader::compact_target_from_u256(
-    ///         &BlockHeader::u256_from_compact_target(0x1d00ffff)
-    ///     )
-    /// );
-    /// ```
-    pub fn u256_from_compact_target(bits: u32) -> Uint256 {
-        // This is a floating-point "compact" encoding originally used by
-        // OpenSSL, which satoshi put into consensus code, so we're stuck
-        // with it. The exponent needs to have 3 subtracted from it, hence
-        // this goofy decoding code:
-        let (mant, expt) = {
-            let unshifted_expt = bits >> 24;
-            if unshifted_expt <= 3 {
-                ((bits & 0xFFFFFF) >> (8 * (3 - unshifted_expt as usize)), 0)
-            } else {
-                (bits & 0xFFFFFF, 8 * ((bits >> 24) - 3))
-            }
-        };
-
-        // The mantissa is signed but may not be negative
-        if mant > 0x7FFFFF {
-            Default::default()
-        } else {
-            Uint256::from_u64(mant as u64).unwrap() << (expt as usize)
-        }
-    }
-
-    /// Computes the target value in float format from Uint256 format.
-    pub fn compact_target_from_u256(value: &Uint256) -> u32 {
-        let mut size = (value.bits() + 7) / 8;
-        let mut compact = if size <= 3 {
-            (value.low_u64() << (8 * (3 - size))) as u32
-        } else {
-            let bn = *value >> (8 * (size - 3));
-            bn.low_u32()
-        };
-
-        if (compact & 0x00800000) != 0 {
-            compact >>= 8;
-            size += 1;
-        }
-
-        compact | (size << 24) as u32
-    }
-
-    /// Computes the popular "difficulty" measure for mining.
-    pub fn difficulty(&self, network: Network) -> u64 {
-        (max_target(network) / self.target()).low_u64()
-    }
-
-    /// Checks that the proof-of-work for the block is valid, returning the block hash.
-    pub fn validate_pow(&self, required_target: &Uint256) -> Result<BlockHash, util::Error> {
-        let target = &self.target();
-        if target != required_target {
-            return Err(BlockBadTarget);
-        }
-        let block_hash = self.block_hash();
-        let mut ret = [0u64; 4];
-        util::endian::bytes_to_u64_slice_le(block_hash.as_inner(), &mut ret);
-        let hash = &Uint256(ret);
-        if hash <= target { Ok(block_hash) } else { Err(BlockBadProofOfWork) }
-    }
-
-    /// Returns the total work of the block.
-    pub fn work(&self) -> Uint256 {
-        // 2**256 / (target + 1) == ~target / (target+1) + 1    (eqn shamelessly stolen from bitcoind)
-        let mut ret = !self.target();
-        let mut ret1 = self.target();
-        ret1.increment();
-        ret = ret / ret1;
-        ret.increment();
-        ret
-    }
-}
-
-/// A Bitcoin block, which is a collection of transactions with an attached
-/// proof of work.
-#[derive(PartialEq, Eq, Clone, Debug)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct Block {
-    /// The block header
-    pub header: BlockHeader,
-    /// List of transactions contained in the block
-    pub txdata: Vec<Transaction>
-}
-
-impl_consensus_encoding!(Block, header, txdata);
-
-impl Block {
-    /// Returns the block hash.
-    pub fn block_hash(&self) -> BlockHash {
-        self.header.block_hash()
-    }
-
-    /// check if merkle root of header matches merkle root of the transaction list
-    pub fn check_merkle_root(&self) -> bool {
-        match self.compute_merkle_root() {
-            Some(merkle_root) => self.header.merkle_root == merkle_root,
-            None => false,
-        }
-    }
-
-    /// Checks if witness commitment in coinbase matches the transaction list.
-    pub fn check_witness_commitment(&self) -> bool {
-        const MAGIC: [u8; 6] = [0x6a, 0x24, 0xaa, 0x21, 0xa9, 0xed];
-        // Witness commitment is optional if there are no transactions using SegWit in the block.
-        if self.txdata.iter().all(|t| t.input.iter().all(|i| i.witness.is_empty())) {
-            return true;
-        }
-
-        if self.txdata.is_empty() {
-            return false;
-        }
-
-        let coinbase = &self.txdata[0];
-        if !coinbase.is_coin_base() {
-            return false;
-        }
-
-        // Commitment is in the last output that starts with magic bytes.
-        if let Some(pos) = coinbase.output.iter()
-            .rposition(|o| o.script_pubkey.len () >= 38 && o.script_pubkey[0..6] ==  MAGIC)
-        {
-            let commitment = WitnessCommitment::from_slice(&coinbase.output[pos].script_pubkey.as_bytes()[6..38]).unwrap();
-            // Witness reserved value is in coinbase input witness.
-            let witness_vec: Vec<_> = coinbase.input[0].witness.iter().collect();
-            if witness_vec.len() == 1 && witness_vec[0].len() == 32 {
-                if let Some(witness_root) = self.witness_root() {
-                    return commitment == Self::compute_witness_commitment(&witness_root, witness_vec[0]);
-                }
-            }
-        }
-
-        false
-    }
-
-    /// Computes the transaction merkle root.
-    pub fn compute_merkle_root(&self) -> Option<TxMerkleNode> {
-        let hashes = self.txdata.iter().map(|obj| obj.txid().as_hash());
-        dash_merkle_root(hashes).map(|h| h.into())
-    }
-
-    /// Calculate the transaction merkle root.
-    #[deprecated(since = "0.28.0", note = "Please use `block::compute_merkle_root` instead.")]
-    pub fn merkle_root(&self) -> Option<TxMerkleNode> {
-        self.compute_merkle_root()
-    }
-
-    /// Computes the witness commitment for the block's transaction list.
-    pub fn compute_witness_commitment(witness_root: &WitnessMerkleNode, witness_reserved_value: &[u8]) -> WitnessCommitment {
-        let mut encoder = WitnessCommitment::engine();
-        witness_root.consensus_encode(&mut encoder).expect("engines don't error");
-        encoder.input(witness_reserved_value);
-        WitnessCommitment::from_engine(encoder)
-    }
-
-    /// Computes the merkle root of transactions hashed for witness.
-    pub fn witness_root(&self) -> Option<WitnessMerkleNode> {
-        let hashes = self.txdata.iter().enumerate().map(|(i, t)| {
-            if i == 0 {
-                // Replace the first hash with zeroes.
-                Wtxid::default().as_hash()
-            } else {
-                t.wtxid().as_hash()
-            }
-        });
-        dash_merkle_root(hashes).map(|h| h.into())
-    }
-
-    /// base_size == size of header + size of encoded transaction count.
-    fn base_size(&self) -> usize {
-        80 + VarInt(self.txdata.len() as u64).len()
-    }
-
-    /// Returns the size of the block.
-    #[deprecated(since = "0.28.0", note = "Please use `block::size` instead.")]
-    pub fn get_size(&self) -> usize {
-        self.size()
-    }
-
-    /// Returns the size of the block.
-    ///
-    /// size == size of header + size of encoded transaction count + total size of transactions.
-    pub fn size(&self) -> usize {
-        let txs_size: usize = self.txdata.iter().map(Transaction::size).sum();
-        self.base_size() + txs_size
-    }
-
-    /// Returns the strippedsize of the block.
-    #[deprecated(since = "0.28.0", note = "Please use `transaction::strippedsize` instead.")]
-    pub fn get_strippedsize(&self) -> usize {
-        self.strippedsize()
-    }
-
-    /// Returns the strippedsize of the block.
-    pub fn strippedsize(&self) -> usize {
-        let txs_size: usize = self.txdata.iter().map(Transaction::strippedsize).sum();
-        self.base_size() + txs_size
-    }
-
-    /// Returns the weight of the block.
-    #[deprecated(since = "0.28.0", note = "Please use `transaction::weight` instead.")]
-    pub fn get_weight(&self) -> usize {
-        self.weight()
-    }
-
-    /// Returns the weight of the block.
-    pub fn weight(&self) -> usize {
-        let base_weight = WITNESS_SCALE_FACTOR * self.base_size();
-        let txs_weight: usize = self.txdata.iter().map(Transaction::weight).sum();
-        base_weight + txs_weight
-    }
-
-    /// Returns the coinbase transaction, if one is present.
-    pub fn coinbase(&self) -> Option<&Transaction> {
-        self.txdata.first()
-    }
-
-    /// Returns the block height, as encoded in the coinbase transaction according to BIP34.
-    pub fn bip34_block_height(&self) -> Result<u64, Bip34Error> {
-        // Citing the spec:
-        // Add height as the first item in the coinbase transaction's scriptSig,
-        // and increase block version to 2. The format of the height is
-        // "serialized CScript" -- first byte is number of bytes in the number
-        // (will be 0x03 on main net for the next 150 or so years with 2^23-1
-        // blocks), following bytes are little-endian representation of the
-        // number (including a sign bit). Height is the height of the mined
-        // block in the block chain, where the genesis block is height zero (0).
-
-        if self.header.version < 2 {
-            return Err(Bip34Error::Unsupported);
-        }
-
-        let cb = self.coinbase().ok_or(Bip34Error::NotPresent)?;
-        let input = cb.input.first().ok_or(Bip34Error::NotPresent)?;
-        let push = input.script_sig.instructions_minimal().next().ok_or(Bip34Error::NotPresent)?;
-        match push.map_err(|_| Bip34Error::NotPresent)? {
-            script::Instruction::PushBytes(b) if b.len() <= 8 => {
-                // Expand the push to exactly 8 bytes (LE).
-                let mut full = [0; 8];
-                full[0..b.len()].copy_from_slice(b);
-                Ok(util::endian::slice_to_u64_le(&full))
-            }
-            script::Instruction::PushBytes(b) if b.len() > 8 => {
-                Err(Bip34Error::UnexpectedPush(b.to_vec()))
-            }
-            _ => Err(Bip34Error::NotPresent),
-        }
-    }
-}
-
-/// An error when looking up a BIP34 block height.
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub enum Bip34Error {
-    /// The block does not support BIP34 yet.
-    Unsupported,
-    /// No push was present where the BIP34 push was expected.
-    NotPresent,
-    /// The BIP34 push was larger than 8 bytes.
-    UnexpectedPush(Vec<u8>),
-}
-
-impl fmt::Display for Bip34Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            Bip34Error::Unsupported => write!(f, "block doesn't support BIP34"),
-            Bip34Error::NotPresent => write!(f, "BIP34 push not present in block's coinbase"),
-            Bip34Error::UnexpectedPush(ref p) => {
-                write!(f, "unexpected byte push of > 8 bytes: {:?}", p)
-            }
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-impl ::std::error::Error for Bip34Error {}
-
-#[cfg(test)]
-mod tests {
-    use hashes::hex::FromHex;
-
-    use blockdata::block::{Block, BlockHeader};
-    use consensus::encode::{deserialize, serialize};
-    use util::uint::Uint256;
-    use util::Error::{BlockBadTarget, BlockBadProofOfWork};
-    use network::constants::Network;
-
-    #[test]
-    fn test_coinbase_and_bip34() {
-        // testnet block 100,000
-        let block_hex = "0200000035ab154183570282ce9afc0b494c9fc6a3cfea05aa8c1add2ecc56490000000038ba3d78e4500a5a7570dbe61960398add4410d278b21cd9708e6d9743f374d544fc055227f1001c29c1ea3b0101000000010000000000000000000000000000000000000000000000000000000000000000ffffffff3703a08601000427f1001c046a510100522cfabe6d6d0000000000000000000068692066726f6d20706f6f6c7365727665726aac1eeeed88ffffffff0100f2052a010000001976a914912e2b234f941f30b18afbb4fa46171214bf66c888ac00000000";
-        let block: Block = deserialize(&Vec::<u8>::from_hex(block_hex).unwrap()).unwrap();
-
-        let cb_txid = "d574f343976d8e70d91cb278d21044dd8a396019e6db70755a0a50e4783dba38";
-        assert_eq!(block.coinbase().unwrap().txid().to_string(), cb_txid);
-
-        assert_eq!(block.bip34_block_height(), Ok(100_000));
-
-
-        // block with 9-byte bip34 push
-        let bad_hex = "0200000035ab154183570282ce9afc0b494c9fc6a3cfea05aa8c1add2ecc56490000000038ba3d78e4500a5a7570dbe61960398add4410d278b21cd9708e6d9743f374d544fc055227f1001c29c1ea3b0101000000010000000000000000000000000000000000000000000000000000000000000000ffffffff3d09a08601112233445566000427f1001c046a510100522cfabe6d6d0000000000000000000068692066726f6d20706f6f6c7365727665726aac1eeeed88ffffffff0100f2052a010000001976a914912e2b234f941f30b18afbb4fa46171214bf66c888ac00000000";
-        let bad: Block = deserialize(&Vec::<u8>::from_hex(bad_hex).unwrap()).unwrap();
-
-        let push = Vec::<u8>::from_hex("a08601112233445566").unwrap();
-        assert_eq!(bad.bip34_block_height(), Err(super::Bip34Error::UnexpectedPush(push)));
-    }
-
-    #[test]
-    fn block_test() {
-        // Mainnet block 00000000b0c5a240b2a61d2e75692224efd4cbecdf6eaf4cc2cf477ca7c270e7
-        let some_block = Vec::from_hex("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").unwrap();
-        let cutoff_block = Vec::from_hex("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").unwrap();
-
-        let prevhash = Vec::from_hex("4ddccd549d28f385ab457e98d1b11ce80bfea2c5ab93015ade4973e400000000").unwrap();
-        let merkle = Vec::from_hex("bf4473e53794beae34e64fccc471dace6ae544180816f89591894e0f417a914c").unwrap();
-        let work = Uint256([0x100010001u64, 0, 0, 0]);
-
-        let decode: Result<Block, _> = deserialize(&some_block);
-        let bad_decode: Result<Block, _> = deserialize(&cutoff_block);
-
-        assert!(decode.is_ok());
-        assert!(bad_decode.is_err());
-        let real_decode = decode.unwrap();
-        assert_eq!(real_decode.header.version, 1);
-        assert_eq!(serialize(&real_decode.header.prev_blockhash), prevhash);
-        assert_eq!(real_decode.header.merkle_root, real_decode.compute_merkle_root().unwrap());
-        assert_eq!(serialize(&real_decode.header.merkle_root), merkle);
-        assert_eq!(real_decode.header.time, 1231965655);
-        assert_eq!(real_decode.header.bits, 486604799);
-        assert_eq!(real_decode.header.nonce, 2067413810);
-        assert_eq!(real_decode.header.work(), work);
-        assert_eq!(real_decode.header.validate_pow(&real_decode.header.target()).unwrap(), real_decode.block_hash());
-        assert_eq!(real_decode.header.difficulty(Network::Dash), 1);
-        // [test] TODO: check the transaction data
-
-        assert_eq!(real_decode.size(), some_block.len());
-        assert_eq!(real_decode.strippedsize(), some_block.len());
-        assert_eq!(real_decode.weight(), some_block.len() * 4);
-
-        // should be also ok for a non-witness block as commitment is optional in that case
-        assert!(real_decode.check_witness_commitment());
-
-        assert_eq!(serialize(&real_decode), some_block);
-    }
-
-    // Check testnet block 000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b
-    #[test]
-    fn segwit_block_test() {
-        let segwit_block = include_bytes!("../../test_data/testnet_block_000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b.raw").to_vec();
-
-        let decode: Result<Block, _> = deserialize(&segwit_block);
-
-        let prevhash = Vec::from_hex("2aa2f2ca794ccbd40c16e2f3333f6b8b683f9e7179b2c4d74906000000000000").unwrap();
-        let merkle = Vec::from_hex("10bc26e70a2f672ad420a6153dd0c28b40a6002c55531bfc99bf8994a8e8f67e").unwrap();
-        let work = Uint256([0x257c3becdacc64u64, 0, 0, 0]);
-
-        assert!(decode.is_ok());
-        let real_decode = decode.unwrap();
-        assert_eq!(real_decode.header.version, 0x20000000);  // VERSIONBITS but no bits set
-        assert_eq!(serialize(&real_decode.header.prev_blockhash), prevhash);
-        assert_eq!(serialize(&real_decode.header.merkle_root), merkle);
-        assert_eq!(real_decode.header.merkle_root, real_decode.compute_merkle_root().unwrap());
-        assert_eq!(real_decode.header.time, 1472004949);
-        assert_eq!(real_decode.header.bits, 0x1a06d450);
-        assert_eq!(real_decode.header.nonce, 1879759182);
-        assert_eq!(real_decode.header.work(), work);
-        assert_eq!(real_decode.header.validate_pow(&real_decode.header.target()).unwrap(), real_decode.block_hash());
-        assert_eq!(real_decode.header.difficulty(Network::Testnet), 2456598);
-        // [test] TODO: check the transaction data
-
-        assert_eq!(real_decode.size(), segwit_block.len());
-        assert_eq!(real_decode.strippedsize(), 4283);
-        assert_eq!(real_decode.weight(), 17168);
-
-        assert!(real_decode.check_witness_commitment());
-
-        assert_eq!(serialize(&real_decode), segwit_block);
-    }
-
-    #[test]
-    fn block_version_test() {
-        let block = Vec::from_hex("ffffff7f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000").unwrap();
-        let decode: Result<Block, _> = deserialize(&block);
-        assert!(decode.is_ok());
-        let real_decode = decode.unwrap();
-        assert_eq!(real_decode.header.version, 2147483647);
-
-        let block2 = Vec::from_hex("000000800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000").unwrap();
-        let decode2: Result<Block, _> = deserialize(&block2);
-        assert!(decode2.is_ok());
-        let real_decode2 = decode2.unwrap();
-        assert_eq!(real_decode2.header.version, -2147483648);
-    }
-
-    #[test]
-    fn validate_pow_test() {
-        let some_header = Vec::from_hex("010000004ddccd549d28f385ab457e98d1b11ce80bfea2c5ab93015ade4973e400000000bf4473e53794beae34e64fccc471dace6ae544180816f89591894e0f417a914cd74d6e49ffff001d323b3a7b").unwrap();
-        let some_header: BlockHeader = deserialize(&some_header).expect("Can't deserialize correct block header");
-        assert_eq!(some_header.validate_pow(&some_header.target()).unwrap(), some_header.block_hash());
-
-        // test with zero target
-        match some_header.validate_pow(&Uint256::default()) {
-            Err(BlockBadTarget) => (),
-            _ => assert!(false)
-        }
-
-        // test with modified header
-        let mut invalid_header: BlockHeader = some_header.clone();
-        invalid_header.version = invalid_header.version + 1;
-        match invalid_header.validate_pow(&invalid_header.target()) {
-            Err(BlockBadProofOfWork) => (),
-            _ => assert!(false)
-        }
-    }
-
-    #[test]
-    fn compact_roundrtip_test() {
-        let some_header = Vec::from_hex("010000004ddccd549d28f385ab457e98d1b11ce80bfea2c5ab93015ade4973e400000000bf4473e53794beae34e64fccc471dace6ae544180816f89591894e0f417a914cd74d6e49ffff001d323b3a7b").unwrap();
-
-        let header: BlockHeader = deserialize(&some_header).expect("Can't deserialize correct block header");
-
-        assert_eq!(header.bits, BlockHeader::compact_target_from_u256(&header.target()));
-    }
-}
-
-#[cfg(all(test, feature = "unstable"))]
-mod benches {
-    use super::Block;
-    use EmptyWrite;
-    use consensus::{deserialize, Encodable};
-    use test::{black_box, Bencher};
-    use network::stream_reader::StreamReader;
-
-    #[bench]
-    #[allow(deprecated)]
-    pub fn bench_stream_reader(bh: &mut Bencher) {
-        let big_block = include_bytes!("../../test_data/mainnet_block_000000000000000000000c835b2adcaedc20fdf6ee440009c249452c726dafae.raw");
-        assert_eq!(big_block.len(), 1_381_836);
-        let big_block = black_box(big_block);
-
-        bh.iter(|| {
-            let mut reader = StreamReader::new(&big_block[..], None);
-            let block: Block = reader.read_next().unwrap();
-            black_box(&block);
-        });
-    }
-
-    #[bench]
-    pub fn bench_block_serialize(bh: &mut Bencher) {
-        let raw_block = include_bytes!("../../test_data/mainnet_block_000000000000000000000c835b2adcaedc20fdf6ee440009c249452c726dafae.raw");
-
-        let block: Block = deserialize(&raw_block[..]).unwrap();
-
-        let mut data = Vec::with_capacity(raw_block.len());
-
-        bh.iter(|| {
-            let result = block.consensus_encode(&mut data);
-            black_box(&result);
-            data.clear();
-        });
-    }
-
-    #[bench]
-    pub fn bench_block_serialize_logic(bh: &mut Bencher) {
-        let raw_block = include_bytes!("../../test_data/mainnet_block_000000000000000000000c835b2adcaedc20fdf6ee440009c249452c726dafae.raw");
-
-        let block: Block = deserialize(&raw_block[..]).unwrap();
-
-        bh.iter(|| {
-            let size = block.consensus_encode(&mut EmptyWrite);
-            black_box(&size);
-        });
-    }
-
-    #[bench]
-    pub fn bench_block_deserialize(bh: &mut Bencher) {
-        let raw_block = include_bytes!("../../test_data/mainnet_block_000000000000000000000c835b2adcaedc20fdf6ee440009c249452c726dafae.raw");
-
-        bh.iter(|| {
-            let block: Block = deserialize(&raw_block[..]).unwrap();
-            black_box(&block);
-        });
-    }
-}
diff --git a/src/blockdata/constants.rs b/src/blockdata/constants.rs
deleted file mode 100644
index 6f0982b55..000000000
--- a/src/blockdata/constants.rs
+++ /dev/null
@@ -1,261 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Blockdata constants.
-//!
-//! This module provides various constants relating to the blockchain and
-//! consensus code. In particular, it defines the genesis block and its
-//! single transaction.
-//!
-
-use prelude::*;
-
-use core::default::Default;
-
-use hashes::hex::{self, HexIterator};
-use hashes::sha256d;
-use blockdata::opcodes;
-use blockdata::script;
-use blockdata::block::{Block, BlockHeader};
-use blockdata::transaction::outpoint::OutPoint;
-use blockdata::transaction::txin::TxIn;
-use blockdata::transaction::txout::TxOut;
-use blockdata::witness::Witness;
-use network::constants::Network;
-use Transaction;
-use util::uint::Uint256;
-
-/// The maximum allowable sequence number
-pub const MAX_SEQUENCE: u32 = 0xFFFFFFFF;
-/// How many duffs are in "one dash"
-pub const COIN_VALUE: u64 = 100_000_000;
-/// How many seconds between blocks we expect on average
-pub const TARGET_BLOCK_SPACING: u32 = 600;
-/// How many blocks between diffchanges
-pub const DIFFCHANGE_INTERVAL: u32 = 2016;
-/// How much time on average should occur between diffchanges
-pub const DIFFCHANGE_TIMESPAN: u32 = 14 * 24 * 3600;
-/// The maximum allowed weight for a block, see BIP 141 (network rule)
-pub const MAX_BLOCK_WEIGHT: u32 = 4_000_000;
-/// The minimum transaction weight for a valid serialized transaction
-pub const MIN_TRANSACTION_WEIGHT: u32 = 4 * 60;
-/// The factor that non-witness serialization data is multiplied by during weight calculation
-pub const WITNESS_SCALE_FACTOR: usize = 4;
-/// The maximum allowed number of signature check operations in a block
-pub const MAX_BLOCK_SIGOPS_COST: i64 = 80_000;
-/// Mainnet (dash) pubkey address prefix.
-pub const PUBKEY_ADDRESS_PREFIX_MAIN: u8 = 76; // 0x4C
-/// Mainnet (dash) script address prefix.
-pub const SCRIPT_ADDRESS_PREFIX_MAIN: u8 = 16; // 0x10
-/// Test (testnet, devnet, regtest) pubkey address prefix.
-pub const PUBKEY_ADDRESS_PREFIX_TEST: u8 = 140; // 0x8C
-/// Test (testnet, devnet, regtest) script address prefix.
-pub const SCRIPT_ADDRESS_PREFIX_TEST: u8 = 19; // 0x13
-/// The maximum allowed script size.
-pub const MAX_SCRIPT_ELEMENT_SIZE: usize = 520;
-/// How may blocks between halvings.
-pub const SUBSIDY_HALVING_INTERVAL: u32 = 210_000;
-
-/// In Bitcoind this is insanely described as ~((u256)0 >> 32)
-pub fn max_target(_: Network) -> Uint256 {
-    Uint256::from_u64(0xFFFF).unwrap() << 208
-}
-
-/// The maximum value allowed in an output (useful for sanity checking,
-/// since keeping everything below this value should prevent overflows
-/// if you are doing anything remotely sane with monetary values).
-pub fn max_money(_: Network) -> u64 {
-    21_000_000 * COIN_VALUE
-}
-
-/// Constructs and returns the coinbase (and only) transaction of the Bitcoin genesis block
-fn dash_genesis_tx() -> Transaction {
-    // Base
-    let mut ret = Transaction {
-        version: 1,
-        lock_time: 0,
-        input: vec![],
-        output: vec![],
-        special_transaction_payload: None
-    };
-
-    // Inputs
-    let in_script = script::Builder::new().push_scriptint(486604799)
-                                          .push_scriptint(4)
-                                          .push_slice(b"The Times 03/Jan/2009 Chancellor on brink of second bailout for banks")
-                                          .into_script();
-    ret.input.push(TxIn {
-        previous_output: OutPoint::null(),
-        script_sig: in_script,
-        sequence: MAX_SEQUENCE,
-        witness: Witness::default(),
-    });
-
-    // Outputs
-    let script_bytes: Result<Vec<u8>, hex::Error> =
-        HexIterator::new("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f").unwrap()
-            .collect();
-    let out_script = script::Builder::new()
-        .push_slice(script_bytes.unwrap().as_slice())
-        .push_opcode(opcodes::all::OP_CHECKSIG)
-        .into_script();
-    ret.output.push(TxOut {
-        value: 50 * COIN_VALUE,
-        script_pubkey: out_script
-    });
-
-    // end
-    ret
-}
-
-/// Constructs and returns the genesis block
-pub fn genesis_block(network: Network) -> Block {
-    let txdata = vec![dash_genesis_tx()];
-    let hash: sha256d::Hash = txdata[0].txid().into();
-    let merkle_root = hash.into();
-    match network {
-        Network::Dash => {
-            Block {
-                header: BlockHeader {
-                    version: 1,
-                    prev_blockhash: Default::default(),
-                    merkle_root,
-                    time: 1231006505,
-                    bits: 0x1d00ffff,
-                    nonce: 2083236893
-                },
-                txdata,
-            }
-        }
-        Network::Testnet => {
-            Block {
-                header: BlockHeader {
-                    version: 1,
-                    prev_blockhash: Default::default(),
-                    merkle_root,
-                    time: 1296688602,
-                    bits: 0x1d00ffff,
-                    nonce: 414098458
-                },
-                txdata,
-            }
-        }
-        Network::Devnet => {
-            Block {
-                header: BlockHeader {
-                    version: 1,
-                    prev_blockhash: Default::default(),
-                    merkle_root,
-                    time: 1598918400,
-                    bits: 0x1e0377ae,
-                    nonce: 52613770
-                },
-                txdata,
-            }
-        }
-        Network::Regtest => {
-            Block {
-                header: BlockHeader {
-                    version: 1,
-                    prev_blockhash: Default::default(),
-                    merkle_root,
-                    time: 1296688602,
-                    bits: 0x207fffff,
-                    nonce: 2
-                },
-                txdata,
-            }
-        }
-    }
-}
-
-#[cfg(test)]
-mod test {
-    use core::default::Default;
-    use hashes::hex::FromHex;
-
-    use network::constants::Network;
-    use consensus::encode::serialize;
-    use blockdata::constants::{genesis_block, dash_genesis_tx};
-    use blockdata::constants::{MAX_SEQUENCE, COIN_VALUE};
-
-    #[test]
-    fn bitcoin_genesis_first_transaction() {
-        let gen = dash_genesis_tx();
-
-        assert_eq!(gen.version, 1);
-        assert_eq!(gen.input.len(), 1);
-        assert_eq!(gen.input[0].previous_output.txid, Default::default());
-        assert_eq!(gen.input[0].previous_output.vout, 0xFFFFFFFF);
-        assert_eq!(serialize(&gen.input[0].script_sig),
-                   Vec::from_hex("4d04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73").unwrap());
-
-        assert_eq!(gen.input[0].sequence, MAX_SEQUENCE);
-        assert_eq!(gen.output.len(), 1);
-        assert_eq!(serialize(&gen.output[0].script_pubkey),
-                   Vec::from_hex("434104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac").unwrap());
-        assert_eq!(gen.output[0].value, 50 * COIN_VALUE);
-        assert_eq!(gen.lock_time, 0);
-
-        assert_eq!(format!("{:x}", gen.wtxid()),
-                   "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b".to_string());
-    }
-
-    #[test]
-    fn bitcoin_genesis_full_block() {
-        let gen = genesis_block(Network::Dash);
-
-        assert_eq!(gen.header.version, 1);
-        assert_eq!(gen.header.prev_blockhash, Default::default());
-        assert_eq!(format!("{:x}", gen.header.merkle_root),
-                   "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b".to_string());
-        assert_eq!(gen.header.time, 1231006505);
-        assert_eq!(gen.header.bits, 0x1d00ffff);
-        assert_eq!(gen.header.nonce, 2083236893);
-        assert_eq!(format!("{:x}", gen.header.block_hash()),
-                   "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f".to_string());
-    }
-
-    #[test]
-    fn testnet_genesis_full_block() {
-        let gen = genesis_block(Network::Testnet);
-        assert_eq!(gen.header.version, 1);
-        assert_eq!(gen.header.prev_blockhash, Default::default());
-        assert_eq!(format!("{:x}", gen.header.merkle_root),
-                  "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b".to_string());
-        assert_eq!(gen.header.time, 1296688602);
-        assert_eq!(gen.header.bits, 0x1d00ffff);
-        assert_eq!(gen.header.nonce, 414098458);
-        assert_eq!(format!("{:x}", gen.header.block_hash()),
-                   "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943".to_string());
-    }
-
-    #[test]
-    fn devnet_genesis_full_block() {
-        let gen = genesis_block(Network::Devnet);
-        assert_eq!(gen.header.version, 1);
-        assert_eq!(gen.header.prev_blockhash, Default::default());
-        assert_eq!(format!("{:x}", gen.header.merkle_root),
-                  "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b".to_string());
-        assert_eq!(gen.header.time, 1598918400);
-        assert_eq!(gen.header.bits, 0x1e0377ae);
-        assert_eq!(gen.header.nonce, 52613770);
-        assert_eq!(format!("{:x}", gen.header.block_hash()),
-                   "00000008819873e925422c1ff0f99f7cc9bbb232af63a077a480a3633bee1ef6".to_string());
-    }
-}
-
diff --git a/src/blockdata/mod.rs b/src/blockdata/mod.rs
deleted file mode 100644
index d1677bc92..000000000
--- a/src/blockdata/mod.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Bitcoin block data.
-//!
-//! This module defines structures and functions for storing the blocks and
-//! transactions which make up the Bitcoin system.
-//!
-
-pub mod constants;
-pub mod opcodes;
-pub mod script;
-pub mod transaction;
-pub mod block;
-pub mod witness;
-
diff --git a/src/blockdata/opcodes.rs b/src/blockdata/opcodes.rs
deleted file mode 100644
index ca51266d6..000000000
--- a/src/blockdata/opcodes.rs
+++ /dev/null
@@ -1,1168 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Bitcoin script opcodes.
-//!
-//! Bitcoin's script uses a stack-based assembly language. This module defines
-//! all of the opcodes for that language.
-//!
-
-#![allow(non_camel_case_types)]
-
-#[cfg(feature = "serde")] use serde;
-
-#[cfg(feature = "serde")] use prelude::*;
-
-use core::{fmt, convert::From};
-
-// Note: I am deliberately not implementing PartialOrd or Ord on the
-//       opcode enum. If you want to check ranges of opcodes, etc.,
-//       write an #[inline] helper function which casts to u8s.
-
-/// A script Opcode.
-#[derive(Copy, Clone, PartialEq, Eq)]
-pub struct All {
-    code: u8,
-}
-
-pub mod all {
-    //! Constants associated with All type
-    use super::All;
-
-    /// Push an empty array onto the stack.
-    pub const OP_PUSHBYTES_0: All = All {code: 0x00};
-    /// Push the next byte as an array onto the stack.
-    pub const OP_PUSHBYTES_1: All = All {code: 0x01};
-    /// Push the next 2 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_2: All = All {code: 0x02};
-    /// Push the next 2 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_3: All = All {code: 0x03};
-    /// Push the next 4 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_4: All = All {code: 0x04};
-    /// Push the next 5 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_5: All = All {code: 0x05};
-    /// Push the next 6 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_6: All = All {code: 0x06};
-    /// Push the next 7 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_7: All = All {code: 0x07};
-    /// Push the next 8 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_8: All = All {code: 0x08};
-    /// Push the next 9 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_9: All = All {code: 0x09};
-    /// Push the next 10 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_10: All = All {code: 0x0a};
-    /// Push the next 11 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_11: All = All {code: 0x0b};
-    /// Push the next 12 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_12: All = All {code: 0x0c};
-    /// Push the next 13 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_13: All = All {code: 0x0d};
-    /// Push the next 14 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_14: All = All {code: 0x0e};
-    /// Push the next 15 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_15: All = All {code: 0x0f};
-    /// Push the next 16 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_16: All = All {code: 0x10};
-    /// Push the next 17 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_17: All = All {code: 0x11};
-    /// Push the next 18 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_18: All = All {code: 0x12};
-    /// Push the next 19 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_19: All = All {code: 0x13};
-    /// Push the next 20 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_20: All = All {code: 0x14};
-    /// Push the next 21 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_21: All = All {code: 0x15};
-    /// Push the next 22 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_22: All = All {code: 0x16};
-    /// Push the next 23 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_23: All = All {code: 0x17};
-    /// Push the next 24 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_24: All = All {code: 0x18};
-    /// Push the next 25 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_25: All = All {code: 0x19};
-    /// Push the next 26 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_26: All = All {code: 0x1a};
-    /// Push the next 27 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_27: All = All {code: 0x1b};
-    /// Push the next 28 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_28: All = All {code: 0x1c};
-    /// Push the next 29 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_29: All = All {code: 0x1d};
-    /// Push the next 30 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_30: All = All {code: 0x1e};
-    /// Push the next 31 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_31: All = All {code: 0x1f};
-    /// Push the next 32 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_32: All = All {code: 0x20};
-    /// Push the next 33 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_33: All = All {code: 0x21};
-    /// Push the next 34 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_34: All = All {code: 0x22};
-    /// Push the next 35 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_35: All = All {code: 0x23};
-    /// Push the next 36 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_36: All = All {code: 0x24};
-    /// Push the next 37 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_37: All = All {code: 0x25};
-    /// Push the next 38 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_38: All = All {code: 0x26};
-    /// Push the next 39 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_39: All = All {code: 0x27};
-    /// Push the next 40 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_40: All = All {code: 0x28};
-    /// Push the next 41 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_41: All = All {code: 0x29};
-    /// Push the next 42 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_42: All = All {code: 0x2a};
-    /// Push the next 43 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_43: All = All {code: 0x2b};
-    /// Push the next 44 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_44: All = All {code: 0x2c};
-    /// Push the next 45 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_45: All = All {code: 0x2d};
-    /// Push the next 46 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_46: All = All {code: 0x2e};
-    /// Push the next 47 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_47: All = All {code: 0x2f};
-    /// Push the next 48 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_48: All = All {code: 0x30};
-    /// Push the next 49 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_49: All = All {code: 0x31};
-    /// Push the next 50 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_50: All = All {code: 0x32};
-    /// Push the next 51 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_51: All = All {code: 0x33};
-    /// Push the next 52 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_52: All = All {code: 0x34};
-    /// Push the next 53 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_53: All = All {code: 0x35};
-    /// Push the next 54 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_54: All = All {code: 0x36};
-    /// Push the next 55 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_55: All = All {code: 0x37};
-    /// Push the next 56 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_56: All = All {code: 0x38};
-    /// Push the next 57 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_57: All = All {code: 0x39};
-    /// Push the next 58 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_58: All = All {code: 0x3a};
-    /// Push the next 59 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_59: All = All {code: 0x3b};
-    /// Push the next 60 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_60: All = All {code: 0x3c};
-    /// Push the next 61 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_61: All = All {code: 0x3d};
-    /// Push the next 62 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_62: All = All {code: 0x3e};
-    /// Push the next 63 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_63: All = All {code: 0x3f};
-    /// Push the next 64 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_64: All = All {code: 0x40};
-    /// Push the next 65 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_65: All = All {code: 0x41};
-    /// Push the next 66 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_66: All = All {code: 0x42};
-    /// Push the next 67 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_67: All = All {code: 0x43};
-    /// Push the next 68 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_68: All = All {code: 0x44};
-    /// Push the next 69 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_69: All = All {code: 0x45};
-    /// Push the next 70 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_70: All = All {code: 0x46};
-    /// Push the next 71 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_71: All = All {code: 0x47};
-    /// Push the next 72 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_72: All = All {code: 0x48};
-    /// Push the next 73 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_73: All = All {code: 0x49};
-    /// Push the next 74 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_74: All = All {code: 0x4a};
-    /// Push the next 75 bytes as an array onto the stack.
-    pub const OP_PUSHBYTES_75: All = All {code: 0x4b};
-    /// Read the next byte as N; push the next N bytes as an array onto the stack.
-    pub const OP_PUSHDATA1: All = All {code: 0x4c};
-    /// Read the next 2 bytes as N; push the next N bytes as an array onto the stack.
-    pub const OP_PUSHDATA2: All = All {code: 0x4d};
-    /// Read the next 4 bytes as N; push the next N bytes as an array onto the stack.
-    pub const OP_PUSHDATA4: All = All {code: 0x4e};
-    /// Push the array `0x81` onto the stack.
-    pub const OP_PUSHNUM_NEG1: All = All {code: 0x4f};
-    /// Synonym for OP_RETURN.
-    pub const OP_RESERVED: All = All {code: 0x50};
-    /// Push the array `0x01` onto the stack.
-    pub const OP_PUSHNUM_1: All = All {code: 0x51};
-    /// Push the array `0x02` onto the stack.
-    pub const OP_PUSHNUM_2: All = All {code: 0x52};
-    /// Push the array `0x03` onto the stack.
-    pub const OP_PUSHNUM_3: All = All {code: 0x53};
-    /// Push the array `0x04` onto the stack.
-    pub const OP_PUSHNUM_4: All = All {code: 0x54};
-    /// Push the array `0x05` onto the stack.
-    pub const OP_PUSHNUM_5: All = All {code: 0x55};
-    /// Push the array `0x06` onto the stack.
-    pub const OP_PUSHNUM_6: All = All {code: 0x56};
-    /// Push the array `0x07` onto the stack.
-    pub const OP_PUSHNUM_7: All = All {code: 0x57};
-    /// Push the array `0x08` onto the stack.
-    pub const OP_PUSHNUM_8: All = All {code: 0x58};
-    /// Push the array `0x09` onto the stack.
-    pub const OP_PUSHNUM_9: All = All {code: 0x59};
-    /// Push the array `0x0a` onto the stack.
-    pub const OP_PUSHNUM_10: All = All {code: 0x5a};
-    /// Push the array `0x0b` onto the stack.
-    pub const OP_PUSHNUM_11: All = All {code: 0x5b};
-    /// Push the array `0x0c` onto the stack.
-    pub const OP_PUSHNUM_12: All = All {code: 0x5c};
-    /// Push the array `0x0d` onto the stack.
-    pub const OP_PUSHNUM_13: All = All {code: 0x5d};
-    /// Push the array `0x0e` onto the stack.
-    pub const OP_PUSHNUM_14: All = All {code: 0x5e};
-    /// Push the array `0x0f` onto the stack.
-    pub const OP_PUSHNUM_15: All = All {code: 0x5f};
-    /// Push the array `0x10` onto the stack.
-    pub const OP_PUSHNUM_16: All = All {code: 0x60};
-    /// Does nothing.
-    pub const OP_NOP: All = All {code: 0x61};
-    /// Synonym for OP_RETURN.
-    pub const OP_VER: All = All {code: 0x62};
-    /// Pop and execute the next statements if a nonzero element was popped.
-    pub const OP_IF: All = All {code: 0x63};
-    /// Pop and execute the next statements if a zero element was popped.
-    pub const OP_NOTIF: All = All {code: 0x64};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_VERIF: All = All {code: 0x65};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_VERNOTIF: All = All {code: 0x66};
-    /// Execute statements if those after the previous OP_IF were not, and vice-versa.
-    /// If there is no previous OP_IF, this acts as a RETURN.
-    pub const OP_ELSE: All = All {code: 0x67};
-    /// Pop and execute the next statements if a zero element was popped.
-    pub const OP_ENDIF: All = All {code: 0x68};
-    /// If the top value is zero or the stack is empty, fail; otherwise, pop the stack.
-    pub const OP_VERIFY: All = All {code: 0x69};
-    /// Fail the script immediately. (Must be executed.).
-    pub const OP_RETURN: All = All {code: 0x6a};
-    /// Pop one element from the main stack onto the alt stack.
-    pub const OP_TOALTSTACK: All = All {code: 0x6b};
-    /// Pop one element from the alt stack onto the main stack.
-    pub const OP_FROMALTSTACK: All = All {code: 0x6c};
-    /// Drops the top two stack items.
-    pub const OP_2DROP: All = All {code: 0x6d};
-    /// Duplicates the top two stack items as AB -> ABAB.
-    pub const OP_2DUP: All = All {code: 0x6e};
-    /// Duplicates the two three stack items as ABC -> ABCABC.
-    pub const OP_3DUP: All = All {code: 0x6f};
-    /// Copies the two stack items of items two spaces back to
-    /// the front, as xxAB -> ABxxAB.
-    pub const OP_2OVER: All = All {code: 0x70};
-    /// Moves the two stack items four spaces back to the front,
-    /// as xxxxAB -> ABxxxx.
-    pub const OP_2ROT: All = All {code: 0x71};
-    /// Swaps the top two pairs, as ABCD -> CDAB.
-    pub const OP_2SWAP: All = All {code: 0x72};
-    /// Duplicate the top stack element unless it is zero.
-    pub const OP_IFDUP: All = All {code: 0x73};
-    /// Push the current number of stack items onto the stack.
-    pub const OP_DEPTH: All = All {code: 0x74};
-    /// Drops the top stack item.
-    pub const OP_DROP: All = All {code: 0x75};
-    /// Duplicates the top stack item.
-    pub const OP_DUP: All = All {code: 0x76};
-    /// Drops the second-to-top stack item.
-    pub const OP_NIP: All = All {code: 0x77};
-    /// Copies the second-to-top stack item, as xA -> AxA.
-    pub const OP_OVER: All = All {code: 0x78};
-    /// Pop the top stack element as N. Copy the Nth stack element to the top.
-    pub const OP_PICK: All = All {code: 0x79};
-    /// Pop the top stack element as N. Move the Nth stack element to the top.
-    pub const OP_ROLL: All = All {code: 0x7a};
-    /// Rotate the top three stack items, as [top next1 next2] -> [next2 top next1].
-    pub const OP_ROT: All = All {code: 0x7b};
-    /// Swap the top two stack items.
-    pub const OP_SWAP: All = All {code: 0x7c};
-    /// Copy the top stack item to before the second item, as [top next] -> [top next top].
-    pub const OP_TUCK: All = All {code: 0x7d};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_CAT: All = All {code: 0x7e};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_SUBSTR: All = All {code: 0x7f};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_LEFT: All = All {code: 0x80};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_RIGHT: All = All {code: 0x81};
-    /// Pushes the length of the top stack item onto the stack.
-    pub const OP_SIZE: All = All {code: 0x82};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_INVERT: All = All {code: 0x83};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_AND: All = All {code: 0x84};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_OR: All = All {code: 0x85};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_XOR: All = All {code: 0x86};
-    /// Pushes 1 if the inputs are exactly equal, 0 otherwise.
-    pub const OP_EQUAL: All = All {code: 0x87};
-    /// Returns success if the inputs are exactly equal, failure otherwise.
-    pub const OP_EQUALVERIFY: All = All {code: 0x88};
-    /// Synonym for OP_RETURN.
-    pub const OP_RESERVED1: All = All {code: 0x89};
-    /// Synonym for OP_RETURN.
-    pub const OP_RESERVED2: All = All {code: 0x8a};
-    /// Increment the top stack element in place.
-    pub const OP_1ADD: All = All {code: 0x8b};
-    /// Decrement the top stack element in place.
-    pub const OP_1SUB: All = All {code: 0x8c};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_2MUL: All = All {code: 0x8d};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_2DIV: All = All {code: 0x8e};
-    /// Multiply the top stack item by -1 in place.
-    pub const OP_NEGATE: All = All {code: 0x8f};
-    /// Absolute value the top stack item in place.
-    pub const OP_ABS: All = All {code: 0x90};
-    /// Map 0 to 1 and everything else to 0, in place.
-    pub const OP_NOT: All = All {code: 0x91};
-    /// Map 0 to 0 and everything else to 1, in place.
-    pub const OP_0NOTEQUAL: All = All {code: 0x92};
-    /// Pop two stack items and push their sum.
-    pub const OP_ADD: All = All {code: 0x93};
-    /// Pop two stack items and push the second minus the top.
-    pub const OP_SUB: All = All {code: 0x94};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_MUL: All = All {code: 0x95};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_DIV: All = All {code: 0x96};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_MOD: All = All {code: 0x97};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_LSHIFT: All = All {code: 0x98};
-    /// Fail the script unconditionally, does not even need to be executed.
-    pub const OP_RSHIFT: All = All {code: 0x99};
-    /// Pop the top two stack items and push 1 if both are nonzero, else push 0.
-    pub const OP_BOOLAND: All = All {code: 0x9a};
-    /// Pop the top two stack items and push 1 if either is nonzero, else push 0.
-    pub const OP_BOOLOR: All = All {code: 0x9b};
-    /// Pop the top two stack items and push 1 if both are numerically equal, else push 0.
-    pub const OP_NUMEQUAL: All = All {code: 0x9c};
-    /// Pop the top two stack items and return success if both are numerically equal, else return failure.
-    pub const OP_NUMEQUALVERIFY: All = All {code: 0x9d};
-    /// Pop the top two stack items and push 0 if both are numerically equal, else push 1.
-    pub const OP_NUMNOTEQUAL: All = All {code: 0x9e};
-    /// Pop the top two items; push 1 if the second is less than the top, 0 otherwise.
-    pub const OP_LESSTHAN : All = All {code: 0x9f};
-    /// Pop the top two items; push 1 if the second is greater than the top, 0 otherwise.
-    pub const OP_GREATERTHAN : All = All {code: 0xa0};
-    /// Pop the top two items; push 1 if the second is <= the top, 0 otherwise.
-    pub const OP_LESSTHANOREQUAL : All = All {code: 0xa1};
-    /// Pop the top two items; push 1 if the second is >= the top, 0 otherwise.
-    pub const OP_GREATERTHANOREQUAL : All = All {code: 0xa2};
-    /// Pop the top two items; push the smaller.
-    pub const OP_MIN: All = All {code: 0xa3};
-    /// Pop the top two items; push the larger.
-    pub const OP_MAX: All = All {code: 0xa4};
-    /// Pop the top three items; if the top is >= the second and < the third, push 1, otherwise push 0.
-    pub const OP_WITHIN: All = All {code: 0xa5};
-    /// Pop the top stack item and push its RIPEMD160 hash.
-    pub const OP_RIPEMD160: All = All {code: 0xa6};
-    /// Pop the top stack item and push its SHA1 hash.
-    pub const OP_SHA1: All = All {code: 0xa7};
-    /// Pop the top stack item and push its SHA256 hash.
-    pub const OP_SHA256: All = All {code: 0xa8};
-    /// Pop the top stack item and push its RIPEMD(SHA256) hash.
-    pub const OP_HASH160: All = All {code: 0xa9};
-    /// Pop the top stack item and push its SHA256(SHA256) hash.
-    pub const OP_HASH256: All = All {code: 0xaa};
-    /// Ignore this and everything preceding when deciding what to sign when signature-checking.
-    pub const OP_CODESEPARATOR: All = All {code: 0xab};
-    /// <https://en.bitcoin.it/wiki/OP_CHECKSIG> pushing 1/0 for success/failure.
-    pub const OP_CHECKSIG: All = All {code: 0xac};
-    /// <https://en.bitcoin.it/wiki/OP_CHECKSIG> returning success/failure.
-    pub const OP_CHECKSIGVERIFY: All = All {code: 0xad};
-    /// Pop N, N pubkeys, M, M signatures, a dummy (due to bug in reference code), and verify that all M signatures are valid.
-    /// Push 1 for "all valid", 0 otherwise.
-    pub const OP_CHECKMULTISIG: All = All {code: 0xae};
-    /// Like the above but return success/failure.
-    pub const OP_CHECKMULTISIGVERIFY: All = All {code: 0xaf};
-    /// Does nothing.
-    pub const OP_NOP1: All = All {code: 0xb0};
-    /// <https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki>
-    pub const OP_CLTV: All = All {code: 0xb1};
-    /// <https://github.com/bitcoin/bips/blob/master/bip-0112.mediawiki>
-    pub const OP_CSV: All = All {code: 0xb2};
-    /// Does nothing.
-    pub const OP_NOP4: All = All {code: 0xb3};
-    /// Does nothing.
-    pub const OP_NOP5: All = All {code: 0xb4};
-    /// Does nothing.
-    pub const OP_NOP6: All = All {code: 0xb5};
-    /// Does nothing.
-    pub const OP_NOP7: All = All {code: 0xb6};
-    /// Does nothing.
-    pub const OP_NOP8: All = All {code: 0xb7};
-    /// Does nothing.
-    pub const OP_NOP9: All = All {code: 0xb8};
-    /// Does nothing.
-    pub const OP_NOP10: All = All {code: 0xb9};
-    // Every other opcode acts as OP_RETURN
-    /// OP_CHECKSIGADD post tapscript.
-    pub const OP_CHECKSIGADD: All = All {code: 0xba};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_187: All = All {code: 0xbb};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_188: All = All {code: 0xbc};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_189: All = All {code: 0xbd};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_190: All = All {code: 0xbe};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_191: All = All {code: 0xbf};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_192: All = All {code: 0xc0};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_193: All = All {code: 0xc1};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_194: All = All {code: 0xc2};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_195: All = All {code: 0xc3};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_196: All = All {code: 0xc4};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_197: All = All {code: 0xc5};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_198: All = All {code: 0xc6};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_199: All = All {code: 0xc7};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_200: All = All {code: 0xc8};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_201: All = All {code: 0xc9};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_202: All = All {code: 0xca};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_203: All = All {code: 0xcb};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_204: All = All {code: 0xcc};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_205: All = All {code: 0xcd};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_206: All = All {code: 0xce};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_207: All = All {code: 0xcf};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_208: All = All {code: 0xd0};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_209: All = All {code: 0xd1};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_210: All = All {code: 0xd2};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_211: All = All {code: 0xd3};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_212: All = All {code: 0xd4};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_213: All = All {code: 0xd5};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_214: All = All {code: 0xd6};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_215: All = All {code: 0xd7};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_216: All = All {code: 0xd8};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_217: All = All {code: 0xd9};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_218: All = All {code: 0xda};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_219: All = All {code: 0xdb};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_220: All = All {code: 0xdc};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_221: All = All {code: 0xdd};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_222: All = All {code: 0xde};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_223: All = All {code: 0xdf};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_224: All = All {code: 0xe0};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_225: All = All {code: 0xe1};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_226: All = All {code: 0xe2};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_227: All = All {code: 0xe3};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_228: All = All {code: 0xe4};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_229: All = All {code: 0xe5};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_230: All = All {code: 0xe6};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_231: All = All {code: 0xe7};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_232: All = All {code: 0xe8};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_233: All = All {code: 0xe9};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_234: All = All {code: 0xea};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_235: All = All {code: 0xeb};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_236: All = All {code: 0xec};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_237: All = All {code: 0xed};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_238: All = All {code: 0xee};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_239: All = All {code: 0xef};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_240: All = All {code: 0xf0};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_241: All = All {code: 0xf1};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_242: All = All {code: 0xf2};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_243: All = All {code: 0xf3};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_244: All = All {code: 0xf4};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_245: All = All {code: 0xf5};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_246: All = All {code: 0xf6};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_247: All = All {code: 0xf7};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_248: All = All {code: 0xf8};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_249: All = All {code: 0xf9};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_250: All = All {code: 0xfa};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_251: All = All {code: 0xfb};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_252: All = All {code: 0xfc};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_253: All = All {code: 0xfd};
-    /// Synonym for OP_RETURN.
-    pub const OP_RETURN_254: All = All {code: 0xfe};
-    /// Synonym for OP_RETURN.
-    pub const OP_INVALIDOPCODE: All = All {code: 0xff};
-}
-
-impl fmt::Debug for All {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str("OP_")?;
-        match *self {
-            All {code: x} if x <= 75 => write!(f, "PUSHBYTES_{}", self.code),
-            all::OP_PUSHDATA1 => write!(f, "PUSHDATA1"),
-            all::OP_PUSHDATA2 => write!(f, "PUSHDATA2"),
-            all::OP_PUSHDATA4 => write!(f, "PUSHDATA4"),
-            all::OP_PUSHNUM_NEG1 => write!(f, "PUSHNUM_NEG1"),
-            all::OP_RESERVED => write!(f, "RESERVED"),
-            All {code: x} if x >= all::OP_PUSHNUM_1.code && x <= all::OP_PUSHNUM_16.code => write!(f, "PUSHNUM_{}", x - all::OP_PUSHNUM_1.code + 1),
-            all::OP_NOP => write!(f, "NOP"),
-            all::OP_VER => write!(f, "VER"),
-            all::OP_IF => write!(f, "IF"),
-            all::OP_NOTIF => write!(f, "NOTIF"),
-            all::OP_VERIF => write!(f, "VERIF"),
-            all::OP_VERNOTIF => write!(f, "VERNOTIF"),
-            all::OP_ELSE => write!(f, "ELSE"),
-            all::OP_ENDIF => write!(f, "ENDIF"),
-            all::OP_VERIFY => write!(f, "VERIFY"),
-            all::OP_RETURN => write!(f, "RETURN"),
-            all::OP_TOALTSTACK => write!(f, "TOALTSTACK"),
-            all::OP_FROMALTSTACK => write!(f, "FROMALTSTACK"),
-            all::OP_2DROP => write!(f, "2DROP"),
-            all::OP_2DUP => write!(f, "2DUP"),
-            all::OP_3DUP => write!(f, "3DUP"),
-            all::OP_2OVER => write!(f, "2OVER"),
-            all::OP_2ROT => write!(f, "2ROT"),
-            all::OP_2SWAP => write!(f, "2SWAP"),
-            all::OP_IFDUP => write!(f, "IFDUP"),
-            all::OP_DEPTH => write!(f, "DEPTH"),
-            all::OP_DROP => write!(f, "DROP"),
-            all::OP_DUP => write!(f, "DUP"),
-            all::OP_NIP => write!(f, "NIP"),
-            all::OP_OVER => write!(f, "OVER"),
-            all::OP_PICK => write!(f, "PICK"),
-            all::OP_ROLL => write!(f, "ROLL"),
-            all::OP_ROT => write!(f, "ROT"),
-            all::OP_SWAP => write!(f, "SWAP"),
-            all::OP_TUCK => write!(f, "TUCK"),
-            all::OP_CAT => write!(f, "CAT"),
-            all::OP_SUBSTR => write!(f, "SUBSTR"),
-            all::OP_LEFT => write!(f, "LEFT"),
-            all::OP_RIGHT => write!(f, "RIGHT"),
-            all::OP_SIZE => write!(f, "SIZE"),
-            all::OP_INVERT => write!(f, "INVERT"),
-            all::OP_AND => write!(f, "AND"),
-            all::OP_OR => write!(f, "OR"),
-            all::OP_XOR => write!(f, "XOR"),
-            all::OP_EQUAL => write!(f, "EQUAL"),
-            all::OP_EQUALVERIFY => write!(f, "EQUALVERIFY"),
-            all::OP_RESERVED1 => write!(f, "RESERVED1"),
-            all::OP_RESERVED2 => write!(f, "RESERVED2"),
-            all::OP_1ADD => write!(f, "1ADD"),
-            all::OP_1SUB => write!(f, "1SUB"),
-            all::OP_2MUL => write!(f, "2MUL"),
-            all::OP_2DIV => write!(f, "2DIV"),
-            all::OP_NEGATE => write!(f, "NEGATE"),
-            all::OP_ABS => write!(f, "ABS"),
-            all::OP_NOT => write!(f, "NOT"),
-            all::OP_0NOTEQUAL => write!(f, "0NOTEQUAL"),
-            all::OP_ADD => write!(f, "ADD"),
-            all::OP_SUB => write!(f, "SUB"),
-            all::OP_MUL => write!(f, "MUL"),
-            all::OP_DIV => write!(f, "DIV"),
-            all::OP_MOD => write!(f, "MOD"),
-            all::OP_LSHIFT => write!(f, "LSHIFT"),
-            all::OP_RSHIFT => write!(f, "RSHIFT"),
-            all::OP_BOOLAND => write!(f, "BOOLAND"),
-            all::OP_BOOLOR => write!(f, "BOOLOR"),
-            all::OP_NUMEQUAL => write!(f, "NUMEQUAL"),
-            all::OP_NUMEQUALVERIFY => write!(f, "NUMEQUALVERIFY"),
-            all::OP_NUMNOTEQUAL => write!(f, "NUMNOTEQUAL"),
-            all::OP_LESSTHAN => write!(f, "LESSTHAN"),
-            all::OP_GREATERTHAN => write!(f, "GREATERTHAN"),
-            all::OP_LESSTHANOREQUAL => write!(f, "LESSTHANOREQUAL"),
-            all::OP_GREATERTHANOREQUAL => write!(f, "GREATERTHANOREQUAL"),
-            all::OP_MIN => write!(f, "MIN"),
-            all::OP_MAX => write!(f, "MAX"),
-            all::OP_WITHIN => write!(f, "WITHIN"),
-            all::OP_RIPEMD160 => write!(f, "RIPEMD160"),
-            all::OP_SHA1 => write!(f, "SHA1"),
-            all::OP_SHA256 => write!(f, "SHA256"),
-            all::OP_HASH160 => write!(f, "HASH160"),
-            all::OP_HASH256 => write!(f, "HASH256"),
-            all::OP_CODESEPARATOR => write!(f, "CODESEPARATOR"),
-            all::OP_CHECKSIG => write!(f, "CHECKSIG"),
-            all::OP_CHECKSIGVERIFY => write!(f, "CHECKSIGVERIFY"),
-            all::OP_CHECKMULTISIG => write!(f, "CHECKMULTISIG"),
-            all::OP_CHECKMULTISIGVERIFY => write!(f, "CHECKMULTISIGVERIFY"),
-            all::OP_CLTV => write!(f, "CLTV"),
-            all::OP_CSV => write!(f, "CSV"),
-            All {code: x} if x >= all::OP_NOP1.code && x <= all::OP_NOP10.code => write!(f, "NOP{}", x - all::OP_NOP1.code + 1),
-            all::OP_INVALIDOPCODE => write!(f, "INVALIDOPCODE"),
-            all::OP_CHECKSIGADD => write!(f, "CHECKSIGADD"),
-            All {code: x} => write!(f, "RETURN_{}", x),
-        }
-    }
-}
-
-/// Classification context for the opcode.
-///
-/// Some opcodes like [`all::OP_RESERVED`] abort the script in `ClassifyContext::Legacy` context,
-/// but will act as `OP_SUCCESSx` in `ClassifyContext::TapScript` (see BIP342 for full list).
-#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub enum ClassifyContext {
-    /// Opcode used in tapscript context.
-    TapScript,
-    /// Opcode used in legacy context.
-    Legacy,
-}
-
-impl All {
-    /// Classifies an Opcode into a broad class.
-    #[inline]
-    pub fn classify(self, ctx: ClassifyContext) -> Class {
-        use self::all::*;
-        match (self, ctx) {
-            // 3 opcodes illegal in all contexts
-            (OP_VERIF, _) | (OP_VERNOTIF, _) | (OP_INVALIDOPCODE, _) => Class::IllegalOp,
-
-            // 15 opcodes illegal in Legacy context
-            (OP_CAT, ctx) | (OP_SUBSTR, ctx)
-            | (OP_LEFT, ctx) | (OP_RIGHT, ctx)
-            | (OP_INVERT, ctx)
-            | (OP_AND, ctx) | (OP_OR, ctx) | (OP_XOR, ctx)
-            | (OP_2MUL, ctx) | (OP_2DIV, ctx)
-            | (OP_MUL, ctx) | (OP_DIV, ctx) | (OP_MOD, ctx)
-            | (OP_LSHIFT, ctx) | (OP_RSHIFT, ctx) if ctx == ClassifyContext::Legacy => Class::IllegalOp,
-
-            // 87 opcodes of SuccessOp class only in TapScript context
-            (op, ClassifyContext::TapScript)
-            if op.code == 80 || op.code == 98 ||
-                (op.code >= 126 && op.code <= 129) ||
-                (op.code >= 131 && op.code <= 134) ||
-                (op.code >= 137 && op.code <= 138) ||
-                (op.code >= 141 && op.code <= 142) ||
-                (op.code >= 149 && op.code <= 153) ||
-                (op.code >= 187 && op.code <= 254) => Class::SuccessOp,
-
-            // 11 opcodes of NoOp class
-            (OP_NOP, _) => Class::NoOp,
-            (op, _) if op.code >= OP_NOP1.code && op.code <= OP_NOP10.code => Class::NoOp,
-
-            // 1 opcode for `OP_RETURN`
-            (OP_RETURN, _) => Class::ReturnOp,
-
-            // 4 opcodes operating equally to `OP_RETURN` only in Legacy context
-            (OP_RESERVED, ctx)
-            | (OP_RESERVED1, ctx) | (OP_RESERVED2, ctx)
-            | (OP_VER, ctx) if ctx == ClassifyContext::Legacy => Class::ReturnOp,
-
-            // 71 opcodes operating equally to `OP_RETURN` only in Legacy context
-            (op, ClassifyContext::Legacy) if op.code >= OP_CHECKSIGADD.code => Class::ReturnOp,
-
-            // 2 opcodes operating equally to `OP_RETURN` only in TapScript context
-            (OP_CHECKMULTISIG, ClassifyContext::TapScript)
-            | (OP_CHECKMULTISIGVERIFY, ClassifyContext::TapScript) => Class::ReturnOp,
-
-            // 1 opcode of PushNum class
-            (OP_PUSHNUM_NEG1, _) => Class::PushNum(-1),
-
-            // 16 opcodes of PushNum class
-            (op, _) if op.code >= OP_PUSHNUM_1.code && op.code <= OP_PUSHNUM_16.code => {
-                Class::PushNum(1 + self.code as i32 - OP_PUSHNUM_1.code as i32)
-            },
-
-            // 76 opcodes of PushBytes class
-            (op, _) if op.code <= OP_PUSHBYTES_75.code => Class::PushBytes(self.code as u32),
-
-            // opcodes of Ordinary class: 61 for Legacy and 60 for TapScript context
-            (_, _) => Class::Ordinary(Ordinary::with(self)),
-        }
-    }
-
-    /// Encode as a byte
-    #[inline]
-    pub fn into_u8(self) -> u8 {
-        self.code
-    }
-}
-
-impl From<u8> for All {
-    #[inline]
-    fn from(b: u8) -> All {
-        All {code: b}
-    }
-}
-
-display_from_debug!(All);
-
-#[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-impl serde::Serialize for All {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: serde::Serializer,
-    {
-        serializer.serialize_str(&self.to_string())
-    }
-}
-
-/// Empty stack is also FALSE.
-pub static OP_FALSE: All = all::OP_PUSHBYTES_0;
-/// Number 1 is also TRUE.
-pub static OP_TRUE: All = all::OP_PUSHNUM_1;
-/// Previously called OP_NOP2.
-pub static OP_NOP2: All = all::OP_CLTV;
-/// Previously called OP_NOP3.
-pub static OP_NOP3: All = all::OP_CSV;
-
-/// Broad categories of opcodes with similar behavior.
-#[derive(Copy, Clone, PartialEq, Eq, Debug)]
-pub enum Class {
-    /// Pushes the given number onto the stack.
-    PushNum(i32),
-    /// Pushes the given number of bytes onto the stack.
-    PushBytes(u32),
-    /// Fails the script if executed.
-    ReturnOp,
-    /// Succeeds the script even if not executed.
-    SuccessOp,
-    /// Fails the script even if not executed.
-    IllegalOp,
-    /// Does nothing.
-    NoOp,
-    /// Any opcode not covered above.
-    Ordinary(Ordinary)
-}
-
-display_from_debug!(Class);
-
-#[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-impl serde::Serialize for Class {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: serde::Serializer,
-    {
-        serializer.serialize_str(&self.to_string())
-    }
-}
-
-macro_rules! ordinary_opcode {
-    ($($op:ident),*) => (
-        #[repr(u8)]
-        #[doc(hidden)]
-        #[derive(Copy, Clone, PartialEq, Eq, Debug)]
-        pub enum Ordinary {
-            $( $op = all::$op.code ),*
-        }
-
-        impl Ordinary {
-            fn with(b: All) -> Self {
-                match b {
-                    $( all::$op => { Ordinary::$op } ),*
-                    _ => unreachable!("construction of `Ordinary` type from non-ordinary opcode {}", b),
-                }
-            }
-
-            /// Try to create from an All
-            pub fn try_from_all(b: All) -> Option<Self> {
-                match b {
-                    $( all::$op => { Some(Ordinary::$op) } ),*
-                    _ => None,
-                }
-            }
-        }
-    );
-}
-
-// "Ordinary" opcodes -- should be 61 of these
-ordinary_opcode! {
-    // pushdata
-    OP_PUSHDATA1, OP_PUSHDATA2, OP_PUSHDATA4,
-    // control flow
-    OP_IF, OP_NOTIF, OP_ELSE, OP_ENDIF, OP_VERIFY,
-    // stack
-    OP_TOALTSTACK, OP_FROMALTSTACK,
-    OP_2DROP, OP_2DUP, OP_3DUP, OP_2OVER, OP_2ROT, OP_2SWAP,
-    OP_DROP, OP_DUP, OP_NIP, OP_OVER, OP_PICK, OP_ROLL, OP_ROT, OP_SWAP, OP_TUCK,
-    OP_IFDUP, OP_DEPTH, OP_SIZE,
-    // equality
-    OP_EQUAL, OP_EQUALVERIFY,
-    // arithmetic
-    OP_1ADD, OP_1SUB, OP_NEGATE, OP_ABS, OP_NOT, OP_0NOTEQUAL,
-    OP_ADD, OP_SUB, OP_BOOLAND, OP_BOOLOR,
-    OP_NUMEQUAL, OP_NUMEQUALVERIFY, OP_NUMNOTEQUAL, OP_LESSTHAN,
-    OP_GREATERTHAN, OP_LESSTHANOREQUAL, OP_GREATERTHANOREQUAL,
-    OP_MIN, OP_MAX, OP_WITHIN,
-    // crypto
-    OP_RIPEMD160, OP_SHA1, OP_SHA256, OP_HASH160, OP_HASH256,
-    OP_CODESEPARATOR, OP_CHECKSIG, OP_CHECKSIGVERIFY,
-    OP_CHECKMULTISIG, OP_CHECKMULTISIGVERIFY,
-    OP_CHECKSIGADD
-}
-
-impl Ordinary {
-    /// Encode as a byte
-    #[inline]
-    pub fn into_u8(self) -> u8 {
-        self as u8
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use std::collections::HashSet;
-
-    use super::*;
-
-    macro_rules! roundtrip {
-        ($unique:expr, $op:ident) => {
-            assert_eq!(all::$op, All::from(all::$op.into_u8()));
-
-            let s1 = format!("{}", all::$op);
-            let s2 = format!("{:?}", all::$op);
-            assert_eq!(s1, s2);
-            assert_eq!(s1, stringify!($op));
-            assert!($unique.insert(s1));
-        }
-    }
-
-    #[test]
-    fn classify_test() {
-        let op174 = all::OP_CHECKMULTISIG;
-        assert_eq!(op174.classify(ClassifyContext::Legacy), Class::Ordinary(Ordinary::OP_CHECKMULTISIG));
-        assert_eq!(op174.classify(ClassifyContext::TapScript), Class::ReturnOp);
-
-        let op175 = all::OP_CHECKMULTISIGVERIFY;
-        assert_eq!(op175.classify(ClassifyContext::Legacy),  Class::Ordinary(Ordinary::OP_CHECKMULTISIGVERIFY));
-        assert_eq!(op175.classify(ClassifyContext::TapScript), Class::ReturnOp);
-
-        let op186 = all::OP_CHECKSIGADD;
-        assert_eq!(op186.classify(ClassifyContext::Legacy), Class::ReturnOp);
-        assert_eq!(op186.classify(ClassifyContext::TapScript), Class::Ordinary(Ordinary::OP_CHECKSIGADD));
-
-        let op187 = all::OP_RETURN_187;
-        assert_eq!(op187.classify(ClassifyContext::Legacy), Class::ReturnOp);
-        assert_eq!(op187.classify(ClassifyContext::TapScript), Class::SuccessOp);
-    }
-
-    #[test]
-    fn str_roundtrip() {
-        let mut unique = HashSet::new();
-        roundtrip!(unique, OP_PUSHBYTES_0);
-        roundtrip!(unique, OP_PUSHBYTES_1);
-        roundtrip!(unique, OP_PUSHBYTES_2);
-        roundtrip!(unique, OP_PUSHBYTES_3);
-        roundtrip!(unique, OP_PUSHBYTES_4);
-        roundtrip!(unique, OP_PUSHBYTES_5);
-        roundtrip!(unique, OP_PUSHBYTES_6);
-        roundtrip!(unique, OP_PUSHBYTES_7);
-        roundtrip!(unique, OP_PUSHBYTES_8);
-        roundtrip!(unique, OP_PUSHBYTES_9);
-        roundtrip!(unique, OP_PUSHBYTES_10);
-        roundtrip!(unique, OP_PUSHBYTES_11);
-        roundtrip!(unique, OP_PUSHBYTES_12);
-        roundtrip!(unique, OP_PUSHBYTES_13);
-        roundtrip!(unique, OP_PUSHBYTES_14);
-        roundtrip!(unique, OP_PUSHBYTES_15);
-        roundtrip!(unique, OP_PUSHBYTES_16);
-        roundtrip!(unique, OP_PUSHBYTES_17);
-        roundtrip!(unique, OP_PUSHBYTES_18);
-        roundtrip!(unique, OP_PUSHBYTES_19);
-        roundtrip!(unique, OP_PUSHBYTES_20);
-        roundtrip!(unique, OP_PUSHBYTES_21);
-        roundtrip!(unique, OP_PUSHBYTES_22);
-        roundtrip!(unique, OP_PUSHBYTES_23);
-        roundtrip!(unique, OP_PUSHBYTES_24);
-        roundtrip!(unique, OP_PUSHBYTES_25);
-        roundtrip!(unique, OP_PUSHBYTES_26);
-        roundtrip!(unique, OP_PUSHBYTES_27);
-        roundtrip!(unique, OP_PUSHBYTES_28);
-        roundtrip!(unique, OP_PUSHBYTES_29);
-        roundtrip!(unique, OP_PUSHBYTES_30);
-        roundtrip!(unique, OP_PUSHBYTES_31);
-        roundtrip!(unique, OP_PUSHBYTES_32);
-        roundtrip!(unique, OP_PUSHBYTES_33);
-        roundtrip!(unique, OP_PUSHBYTES_34);
-        roundtrip!(unique, OP_PUSHBYTES_35);
-        roundtrip!(unique, OP_PUSHBYTES_36);
-        roundtrip!(unique, OP_PUSHBYTES_37);
-        roundtrip!(unique, OP_PUSHBYTES_38);
-        roundtrip!(unique, OP_PUSHBYTES_39);
-        roundtrip!(unique, OP_PUSHBYTES_40);
-        roundtrip!(unique, OP_PUSHBYTES_41);
-        roundtrip!(unique, OP_PUSHBYTES_42);
-        roundtrip!(unique, OP_PUSHBYTES_43);
-        roundtrip!(unique, OP_PUSHBYTES_44);
-        roundtrip!(unique, OP_PUSHBYTES_45);
-        roundtrip!(unique, OP_PUSHBYTES_46);
-        roundtrip!(unique, OP_PUSHBYTES_47);
-        roundtrip!(unique, OP_PUSHBYTES_48);
-        roundtrip!(unique, OP_PUSHBYTES_49);
-        roundtrip!(unique, OP_PUSHBYTES_50);
-        roundtrip!(unique, OP_PUSHBYTES_51);
-        roundtrip!(unique, OP_PUSHBYTES_52);
-        roundtrip!(unique, OP_PUSHBYTES_53);
-        roundtrip!(unique, OP_PUSHBYTES_54);
-        roundtrip!(unique, OP_PUSHBYTES_55);
-        roundtrip!(unique, OP_PUSHBYTES_56);
-        roundtrip!(unique, OP_PUSHBYTES_57);
-        roundtrip!(unique, OP_PUSHBYTES_58);
-        roundtrip!(unique, OP_PUSHBYTES_59);
-        roundtrip!(unique, OP_PUSHBYTES_60);
-        roundtrip!(unique, OP_PUSHBYTES_61);
-        roundtrip!(unique, OP_PUSHBYTES_62);
-        roundtrip!(unique, OP_PUSHBYTES_63);
-        roundtrip!(unique, OP_PUSHBYTES_64);
-        roundtrip!(unique, OP_PUSHBYTES_65);
-        roundtrip!(unique, OP_PUSHBYTES_66);
-        roundtrip!(unique, OP_PUSHBYTES_67);
-        roundtrip!(unique, OP_PUSHBYTES_68);
-        roundtrip!(unique, OP_PUSHBYTES_69);
-        roundtrip!(unique, OP_PUSHBYTES_70);
-        roundtrip!(unique, OP_PUSHBYTES_71);
-        roundtrip!(unique, OP_PUSHBYTES_72);
-        roundtrip!(unique, OP_PUSHBYTES_73);
-        roundtrip!(unique, OP_PUSHBYTES_74);
-        roundtrip!(unique, OP_PUSHBYTES_75);
-        roundtrip!(unique, OP_PUSHDATA1);
-        roundtrip!(unique, OP_PUSHDATA2);
-        roundtrip!(unique, OP_PUSHDATA4);
-        roundtrip!(unique, OP_PUSHNUM_NEG1);
-        roundtrip!(unique, OP_RESERVED);
-        roundtrip!(unique, OP_PUSHNUM_1);
-        roundtrip!(unique, OP_PUSHNUM_2);
-        roundtrip!(unique, OP_PUSHNUM_3);
-        roundtrip!(unique, OP_PUSHNUM_4);
-        roundtrip!(unique, OP_PUSHNUM_5);
-        roundtrip!(unique, OP_PUSHNUM_6);
-        roundtrip!(unique, OP_PUSHNUM_7);
-        roundtrip!(unique, OP_PUSHNUM_8);
-        roundtrip!(unique, OP_PUSHNUM_9);
-        roundtrip!(unique, OP_PUSHNUM_10);
-        roundtrip!(unique, OP_PUSHNUM_11);
-        roundtrip!(unique, OP_PUSHNUM_12);
-        roundtrip!(unique, OP_PUSHNUM_13);
-        roundtrip!(unique, OP_PUSHNUM_14);
-        roundtrip!(unique, OP_PUSHNUM_15);
-        roundtrip!(unique, OP_PUSHNUM_16);
-        roundtrip!(unique, OP_NOP);
-        roundtrip!(unique, OP_VER);
-        roundtrip!(unique, OP_IF);
-        roundtrip!(unique, OP_NOTIF);
-        roundtrip!(unique, OP_VERIF);
-        roundtrip!(unique, OP_VERNOTIF);
-        roundtrip!(unique, OP_ELSE);
-        roundtrip!(unique, OP_ENDIF);
-        roundtrip!(unique, OP_VERIFY);
-        roundtrip!(unique, OP_RETURN);
-        roundtrip!(unique, OP_TOALTSTACK);
-        roundtrip!(unique, OP_FROMALTSTACK);
-        roundtrip!(unique, OP_2DROP);
-        roundtrip!(unique, OP_2DUP);
-        roundtrip!(unique, OP_3DUP);
-        roundtrip!(unique, OP_2OVER);
-        roundtrip!(unique, OP_2ROT);
-        roundtrip!(unique, OP_2SWAP);
-        roundtrip!(unique, OP_IFDUP);
-        roundtrip!(unique, OP_DEPTH);
-        roundtrip!(unique, OP_DROP);
-        roundtrip!(unique, OP_DUP);
-        roundtrip!(unique, OP_NIP);
-        roundtrip!(unique, OP_OVER);
-        roundtrip!(unique, OP_PICK);
-        roundtrip!(unique, OP_ROLL);
-        roundtrip!(unique, OP_ROT);
-        roundtrip!(unique, OP_SWAP);
-        roundtrip!(unique, OP_TUCK);
-        roundtrip!(unique, OP_CAT);
-        roundtrip!(unique, OP_SUBSTR);
-        roundtrip!(unique, OP_LEFT);
-        roundtrip!(unique, OP_RIGHT);
-        roundtrip!(unique, OP_SIZE);
-        roundtrip!(unique, OP_INVERT);
-        roundtrip!(unique, OP_AND);
-        roundtrip!(unique, OP_OR);
-        roundtrip!(unique, OP_XOR);
-        roundtrip!(unique, OP_EQUAL);
-        roundtrip!(unique, OP_EQUALVERIFY);
-        roundtrip!(unique, OP_RESERVED1);
-        roundtrip!(unique, OP_RESERVED2);
-        roundtrip!(unique, OP_1ADD);
-        roundtrip!(unique, OP_1SUB);
-        roundtrip!(unique, OP_2MUL);
-        roundtrip!(unique, OP_2DIV);
-        roundtrip!(unique, OP_NEGATE);
-        roundtrip!(unique, OP_ABS);
-        roundtrip!(unique, OP_NOT);
-        roundtrip!(unique, OP_0NOTEQUAL);
-        roundtrip!(unique, OP_ADD);
-        roundtrip!(unique, OP_SUB);
-        roundtrip!(unique, OP_MUL);
-        roundtrip!(unique, OP_DIV);
-        roundtrip!(unique, OP_MOD);
-        roundtrip!(unique, OP_LSHIFT);
-        roundtrip!(unique, OP_RSHIFT);
-        roundtrip!(unique, OP_BOOLAND);
-        roundtrip!(unique, OP_BOOLOR);
-        roundtrip!(unique, OP_NUMEQUAL);
-        roundtrip!(unique, OP_NUMEQUALVERIFY);
-        roundtrip!(unique, OP_NUMNOTEQUAL);
-        roundtrip!(unique, OP_LESSTHAN );
-        roundtrip!(unique, OP_GREATERTHAN );
-        roundtrip!(unique, OP_LESSTHANOREQUAL );
-        roundtrip!(unique, OP_GREATERTHANOREQUAL );
-        roundtrip!(unique, OP_MIN);
-        roundtrip!(unique, OP_MAX);
-        roundtrip!(unique, OP_WITHIN);
-        roundtrip!(unique, OP_RIPEMD160);
-        roundtrip!(unique, OP_SHA1);
-        roundtrip!(unique, OP_SHA256);
-        roundtrip!(unique, OP_HASH160);
-        roundtrip!(unique, OP_HASH256);
-        roundtrip!(unique, OP_CODESEPARATOR);
-        roundtrip!(unique, OP_CHECKSIG);
-        roundtrip!(unique, OP_CHECKSIGVERIFY);
-        roundtrip!(unique, OP_CHECKMULTISIG);
-        roundtrip!(unique, OP_CHECKMULTISIGVERIFY);
-        roundtrip!(unique, OP_NOP1);
-        roundtrip!(unique, OP_CLTV);
-        roundtrip!(unique, OP_CSV);
-        roundtrip!(unique, OP_NOP4);
-        roundtrip!(unique, OP_NOP5);
-        roundtrip!(unique, OP_NOP6);
-        roundtrip!(unique, OP_NOP7);
-        roundtrip!(unique, OP_NOP8);
-        roundtrip!(unique, OP_NOP9);
-        roundtrip!(unique, OP_NOP10);
-        roundtrip!(unique, OP_CHECKSIGADD);
-        roundtrip!(unique, OP_RETURN_187);
-        roundtrip!(unique, OP_RETURN_188);
-        roundtrip!(unique, OP_RETURN_189);
-        roundtrip!(unique, OP_RETURN_190);
-        roundtrip!(unique, OP_RETURN_191);
-        roundtrip!(unique, OP_RETURN_192);
-        roundtrip!(unique, OP_RETURN_193);
-        roundtrip!(unique, OP_RETURN_194);
-        roundtrip!(unique, OP_RETURN_195);
-        roundtrip!(unique, OP_RETURN_196);
-        roundtrip!(unique, OP_RETURN_197);
-        roundtrip!(unique, OP_RETURN_198);
-        roundtrip!(unique, OP_RETURN_199);
-        roundtrip!(unique, OP_RETURN_200);
-        roundtrip!(unique, OP_RETURN_201);
-        roundtrip!(unique, OP_RETURN_202);
-        roundtrip!(unique, OP_RETURN_203);
-        roundtrip!(unique, OP_RETURN_204);
-        roundtrip!(unique, OP_RETURN_205);
-        roundtrip!(unique, OP_RETURN_206);
-        roundtrip!(unique, OP_RETURN_207);
-        roundtrip!(unique, OP_RETURN_208);
-        roundtrip!(unique, OP_RETURN_209);
-        roundtrip!(unique, OP_RETURN_210);
-        roundtrip!(unique, OP_RETURN_211);
-        roundtrip!(unique, OP_RETURN_212);
-        roundtrip!(unique, OP_RETURN_213);
-        roundtrip!(unique, OP_RETURN_214);
-        roundtrip!(unique, OP_RETURN_215);
-        roundtrip!(unique, OP_RETURN_216);
-        roundtrip!(unique, OP_RETURN_217);
-        roundtrip!(unique, OP_RETURN_218);
-        roundtrip!(unique, OP_RETURN_219);
-        roundtrip!(unique, OP_RETURN_220);
-        roundtrip!(unique, OP_RETURN_221);
-        roundtrip!(unique, OP_RETURN_222);
-        roundtrip!(unique, OP_RETURN_223);
-        roundtrip!(unique, OP_RETURN_224);
-        roundtrip!(unique, OP_RETURN_225);
-        roundtrip!(unique, OP_RETURN_226);
-        roundtrip!(unique, OP_RETURN_227);
-        roundtrip!(unique, OP_RETURN_228);
-        roundtrip!(unique, OP_RETURN_229);
-        roundtrip!(unique, OP_RETURN_230);
-        roundtrip!(unique, OP_RETURN_231);
-        roundtrip!(unique, OP_RETURN_232);
-        roundtrip!(unique, OP_RETURN_233);
-        roundtrip!(unique, OP_RETURN_234);
-        roundtrip!(unique, OP_RETURN_235);
-        roundtrip!(unique, OP_RETURN_236);
-        roundtrip!(unique, OP_RETURN_237);
-        roundtrip!(unique, OP_RETURN_238);
-        roundtrip!(unique, OP_RETURN_239);
-        roundtrip!(unique, OP_RETURN_240);
-        roundtrip!(unique, OP_RETURN_241);
-        roundtrip!(unique, OP_RETURN_242);
-        roundtrip!(unique, OP_RETURN_243);
-        roundtrip!(unique, OP_RETURN_244);
-        roundtrip!(unique, OP_RETURN_245);
-        roundtrip!(unique, OP_RETURN_246);
-        roundtrip!(unique, OP_RETURN_247);
-        roundtrip!(unique, OP_RETURN_248);
-        roundtrip!(unique, OP_RETURN_249);
-        roundtrip!(unique, OP_RETURN_250);
-        roundtrip!(unique, OP_RETURN_251);
-        roundtrip!(unique, OP_RETURN_252);
-        roundtrip!(unique, OP_RETURN_253);
-        roundtrip!(unique, OP_RETURN_254);
-        roundtrip!(unique, OP_INVALIDOPCODE);
-        assert_eq!(unique.len(), 256);
-    }
-}
diff --git a/src/blockdata/script.rs b/src/blockdata/script.rs
deleted file mode 100644
index b8772aa4a..000000000
--- a/src/blockdata/script.rs
+++ /dev/null
@@ -1,1536 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Bitcoin scripts.
-//!
-//! Scripts define Bitcoin's digital signature scheme: a signature is formed
-//! from a script (the second half of which is defined by a coin to be spent,
-//! and the first half provided by the spending transaction), and is valid iff
-//! the script leaves `TRUE` on the stack after being evaluated. Bitcoin's
-//! script is a stack-based assembly language similar in spirit to Forth.
-//!
-//! This module provides the structures and functions needed to support scripts.
-//!
-
-use prelude::*;
-
-use io;
-use core::{fmt, default::Default};
-use core::ops::Index;
-
-#[cfg(feature = "serde")] use serde;
-
-use hash_types::{PubkeyHash, WPubkeyHash, ScriptHash, WScriptHash};
-use blockdata::opcodes;
-use consensus::{encode, Decodable, Encodable};
-use hashes::{Hash, hex};
-use policy::DUST_RELAY_TX_FEE;
-#[cfg(feature="bitcoinconsensus")] use bitcoinconsensus;
-#[cfg(feature="bitcoinconsensus")] use core::convert::From;
-
-use util::key::PublicKey;
-use util::address::WitnessVersion;
-use util::taproot::{LeafVersion, TapBranchHash, TapLeafHash};
-use secp256k1::{Secp256k1, Verification, XOnlyPublicKey};
-use blockdata::transaction::outpoint::OutPoint;
-use schnorr::{TapTweak, TweakedPublicKey, UntweakedPublicKey};
-
-/// A Bitcoin script.
-#[derive(Clone, Default, PartialOrd, Ord, PartialEq, Eq, Hash)]
-pub struct Script(Box<[u8]>);
-
-impl<I> Index<I> for Script
-where
-    [u8]: Index<I>,
-{
-    type Output = <[u8] as Index<I>>::Output;
-
-    #[inline]
-    fn index(&self, index: I) -> &Self::Output {
-        &self.0[index]
-    }
-}
-
-impl AsRef<[u8]> for Script {
-    fn as_ref(&self) -> &[u8] {
-        &self.0
-    }
-}
-
-impl fmt::Debug for Script {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str("Script(")?;
-        self.fmt_asm(f)?;
-        f.write_str(")")
-    }
-}
-
-impl fmt::Display for Script {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Debug::fmt(self, f)
-    }
-}
-
-impl fmt::LowerHex for Script {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        for &ch in self.0.iter() {
-            write!(f, "{:02x}", ch)?;
-        }
-        Ok(())
-    }
-}
-
-impl fmt::UpperHex for Script {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        for &ch in self.0.iter() {
-            write!(f, "{:02X}", ch)?;
-        }
-        Ok(())
-    }
-}
-
-impl hex::FromHex for Script {
-    fn from_byte_iter<I>(iter: I) -> Result<Self, hex::Error>
-    where
-        I: Iterator<Item=Result<u8, hex::Error>> + ExactSizeIterator + DoubleEndedIterator,
-    {
-        Vec::from_byte_iter(iter).map(|v| Script(Box::<[u8]>::from(v)))
-    }
-}
-
-impl ::core::str::FromStr for Script {
-    type Err = hex::Error;
-    fn from_str(s: &str) -> Result<Self, hex::Error> {
-        hex::FromHex::from_hex(s)
-    }
-}
-
-/// An object which can be used to construct a script piece by piece.
-#[derive(PartialEq, Eq, Debug, Clone)]
-pub struct Builder(Vec<u8>, Option<opcodes::All>);
-display_from_debug!(Builder);
-
-impl<I> Index<I> for Builder
-where
-    Vec<u8>: Index<I>,
-{
-    type Output = <Vec<u8> as Index<I>>::Output;
-
-    #[inline]
-    fn index(&self, index: I) -> &Self::Output {
-        &self.0[index]
-    }
-}
-
-/// Ways that a script might fail. Not everything is split up as
-/// much as it could be; patches welcome if more detailed errors
-/// would help you.
-#[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy)]
-pub enum Error {
-    /// Something did a non-minimal push; for more information see
-    /// `https://github.com/bitcoin/bips/blob/master/bip-0062.mediawiki#Push_operators`
-    NonMinimalPush,
-    /// Some opcode expected a parameter, but it was missing or truncated
-    EarlyEndOfScript,
-    /// Tried to read an array off the stack as a number when it was more than 4 bytes
-    NumericOverflow,
-    /// Error validating the script with bitcoinconsensus library
-    BitcoinConsensus(BitcoinConsensusError),
-    /// Can not find the spent output
-    UnknownSpentOutput(OutPoint),
-    /// Can not serialize the spending transaction
-    SerializationError
-}
-
-/// A [`bitcoinconsensus::Error`] alias. Exists to enable the compiler to ensure `bitcoinconsensus`
-/// feature gating is correct.
-#[cfg(feature = "bitcoinconsensus")]
-#[cfg_attr(docsrs, doc(cfg(feature = "bitcoinconsensus")))]
-pub type BitcoinConsensusError = bitcoinconsensus::Error;
-
-/// Dummy error type used when `bitcoinconsensus` feature is not enabled.
-#[cfg(not(feature = "bitcoinconsensus"))]
-#[cfg_attr(docsrs, doc(cfg(not(feature = "bitcoinconsensus"))))]
-#[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy)]
-pub struct BitcoinConsensusError {
-    _uninhabited: Uninhabited,
-}
-
-#[cfg(not(feature = "bitcoinconsensus"))]
-#[cfg_attr(docsrs, doc(cfg(not(feature = "bitcoinconsensus"))))]
-#[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy)]
-enum Uninhabited {}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let str = match *self {
-            Error::NonMinimalPush => "non-minimal datapush",
-            Error::EarlyEndOfScript => "unexpected end of script",
-            Error::NumericOverflow => "numeric overflow (number on stack larger than 4 bytes)",
-            Error::BitcoinConsensus(ref _n) => "bitcoinconsensus verification failed",
-            Error::UnknownSpentOutput(ref _point) => "unknown spent output Transaction::verify()",
-            Error::SerializationError => "can not serialize the spending transaction in Transaction::verify()",
-        };
-        f.write_str(str)
-    }
-}
-
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl ::std::error::Error for Error {}
-
-// Our internal error proves that we only return these two cases from `read_uint_iter`.
-// Since it's private we don't bother with trait impls besides From.
-enum UintError {
-    EarlyEndOfScript,
-    NumericOverflow,
-}
-
-impl From<UintError> for Error {
-    fn from(error: UintError) -> Self {
-        match error {
-            UintError::EarlyEndOfScript => Error::EarlyEndOfScript,
-            UintError::NumericOverflow => Error::NumericOverflow,
-        }
-    }
-}
-
-#[cfg(feature = "bitcoinconsensus")]
-#[doc(hidden)]
-impl From<bitcoinconsensus::Error> for Error {
-    fn from(err: bitcoinconsensus::Error) -> Error {
-        Error::BitcoinConsensus(err)
-    }
-}
-/// Helper to encode an integer in script format
-fn build_scriptint(n: i64) -> Vec<u8> {
-    if n == 0 { return vec![] }
-
-    let neg = n < 0;
-
-    let mut abs = if neg { -n } else { n } as usize;
-    let mut v = vec![];
-    while abs > 0xFF {
-        v.push((abs & 0xFF) as u8);
-        abs >>= 8;
-    }
-    // If the number's value causes the sign bit to be set, we need an extra
-    // byte to get the correct value and correct sign bit
-    if abs & 0x80 != 0 {
-        v.push(abs as u8);
-        v.push(if neg { 0x80u8 } else { 0u8 });
-    }
-    // Otherwise we just set the sign bit ourselves
-    else {
-        abs |= if neg { 0x80 } else { 0 };
-        v.push(abs as u8);
-    }
-    v
-}
-
-/// Helper to decode an integer in script format
-/// Notice that this fails on overflow: the result is the same as in
-/// bitcoind, that only 4-byte signed-magnitude values may be read as
-/// numbers. They can be added or subtracted (and a long time ago,
-/// multiplied and divided), and this may result in numbers which
-/// can't be written out in 4 bytes or less. This is ok! The number
-/// just can't be read as a number again.
-/// This is a bit crazy and subtle, but it makes sense: you can load
-/// 32-bit numbers and do anything with them, which back when mult/div
-/// was allowed, could result in up to a 64-bit number. We don't want
-/// overflow since that's surprising --- and we don't want numbers that
-/// don't fit in 64 bits (for efficiency on modern processors) so we
-/// simply say, anything in excess of 32 bits is no longer a number.
-/// This is basically a ranged type implementation.
-pub fn read_scriptint(v: &[u8]) -> Result<i64, Error> {
-    let len = v.len();
-    if len == 0 { return Ok(0); }
-    if len > 4 { return Err(Error::NumericOverflow); }
-
-    let (mut ret, sh) = v.iter()
-                         .fold((0, 0), |(acc, sh), n| (acc + ((*n as i64) << sh), sh + 8));
-    if v[len - 1] & 0x80 != 0 {
-        ret &= (1 << (sh - 1)) - 1;
-        ret = -ret;
-    }
-    Ok(ret)
-}
-
-/// This is like "`read_scriptint` then map 0 to false and everything
-/// else as true", except that the overflow rules don't apply.
-#[inline]
-pub fn read_scriptbool(v: &[u8]) -> bool {
-    match v.split_last() {
-        Some((last, rest)) => !((last & !0x80 == 0x00) && rest.iter().all(|&b| b == 0)),
-        None => false,
-    }
-}
-
-/// Read a script-encoded unsigned integer
-///
-/// ## Errors
-///
-/// This function returns an error in these cases:
-///
-/// * `data` is shorter than `size` => `EarlyEndOfScript`
-/// * `size` is greater than `u16::max_value / 8` (8191) => `NumericOverflow`
-/// * The number being read overflows `usize` => `NumericOverflow`
-///
-/// Note that this does **not** return an error for `size` between `core::size_of::<usize>()`
-/// and `u16::max_value / 8` if there's no overflow.
-pub fn read_uint(data: &[u8], size: usize) -> Result<usize, Error> {
-    read_uint_iter(&mut data.iter(), size).map_err(Into::into)
-}
-
-// We internally use implementation based on iterator so that it automatically advances as needed
-// Errors are same as above, just different type.
-fn read_uint_iter(data: &mut ::core::slice::Iter<'_, u8>, size: usize) -> Result<usize, UintError> {
-    if data.len() < size {
-        Err(UintError::EarlyEndOfScript)
-    } else if size > usize::from(u16::max_value() / 8) {
-        // Casting to u32 would overflow
-        Err(UintError::NumericOverflow)
-    } else {
-        let mut ret = 0;
-        for (i, item) in data.take(size).enumerate() {
-            ret = usize::from(*item)
-                // Casting is safe because we checked above to not repeat the same check in a loop
-                .checked_shl((i * 8) as u32)
-                .ok_or(UintError::NumericOverflow)?
-                .checked_add(ret)
-                .ok_or(UintError::NumericOverflow)?;
-        }
-        Ok(ret)
-    }
-}
-
-impl Script {
-    /// Creates a new empty script.
-    pub fn new() -> Script { Script(vec![].into_boxed_slice()) }
-
-    /// Generates P2PK-type of scriptPubkey.
-    pub fn new_p2pk(pubkey: &PublicKey) -> Script {
-        Builder::new()
-            .push_key(pubkey)
-            .push_opcode(opcodes::all::OP_CHECKSIG)
-            .into_script()
-    }
-
-    /// Generates P2PKH-type of scriptPubkey.
-    pub fn new_p2pkh(pubkey_hash: &PubkeyHash) -> Script {
-        Builder::new()
-            .push_opcode(opcodes::all::OP_DUP)
-            .push_opcode(opcodes::all::OP_HASH160)
-            .push_slice(&pubkey_hash[..])
-            .push_opcode(opcodes::all::OP_EQUALVERIFY)
-            .push_opcode(opcodes::all::OP_CHECKSIG)
-            .into_script()
-    }
-
-    /// Generates P2SH-type of scriptPubkey with a given hash of the redeem script.
-    pub fn new_p2sh(script_hash: &ScriptHash) -> Script {
-        Builder::new()
-            .push_opcode(opcodes::all::OP_HASH160)
-            .push_slice(&script_hash[..])
-            .push_opcode(opcodes::all::OP_EQUAL)
-            .into_script()
-    }
-
-    /// Generates P2WPKH-type of scriptPubkey.
-    #[deprecated(since = "0.28.0", note = "use Script::new_v0_p2wpkh method instead")]
-    pub fn new_v0_wpkh(pubkey_hash: &WPubkeyHash) -> Script {
-        Script::new_v0_p2wpkh(pubkey_hash)
-    }
-
-    /// Generates P2WPKH-type of scriptPubkey.
-    pub fn new_v0_p2wpkh(pubkey_hash: &WPubkeyHash) -> Script {
-        Script::new_witness_program(WitnessVersion::V0, &pubkey_hash[..])
-    }
-
-    /// Generates P2WSH-type of scriptPubkey with a given hash of the redeem script.
-    #[deprecated(since = "0.28.0", note = "use Script::new_v0_p2wsh method instead")]
-    pub fn new_v0_wsh(script_hash: &WScriptHash) -> Script {
-        Script::new_v0_p2wsh(script_hash)
-    }
-
-    /// Generates P2WSH-type of scriptPubkey with a given hash of the redeem script.
-    pub fn new_v0_p2wsh(script_hash: &WScriptHash) -> Script {
-        Script::new_witness_program(WitnessVersion::V0, &script_hash[..])
-    }
-
-    /// Generates P2TR for script spending path using an internal public key and some optional
-    /// script tree merkle root.
-    pub fn new_v1_p2tr<C: Verification>(secp: &Secp256k1<C>, internal_key: UntweakedPublicKey, merkle_root: Option<TapBranchHash>) -> Script {
-        let (output_key, _) = internal_key.tap_tweak(secp, merkle_root);
-        Script::new_witness_program(WitnessVersion::V1, &output_key.serialize())
-    }
-
-    /// Generates P2TR for key spending path for a known [`TweakedPublicKey`].
-    pub fn new_v1_p2tr_tweaked(output_key: TweakedPublicKey) -> Script {
-        Script::new_witness_program(WitnessVersion::V1, &output_key.serialize())
-    }
-
-    /// Generates P2WSH-type of scriptPubkey with a given hash of the redeem script.
-    pub fn new_witness_program(version: WitnessVersion, program: &[u8]) -> Script {
-        Builder::new()
-            .push_opcode(version.into())
-            .push_slice(program)
-            .into_script()
-    }
-
-    /// Generates OP_RETURN-type of scriptPubkey for the given data.
-    pub fn new_op_return(data: &[u8]) -> Script {
-        Builder::new()
-            .push_opcode(opcodes::all::OP_RETURN)
-            .push_slice(data)
-            .into_script()
-    }
-
-    /// Returns 160-bit hash of the script.
-    pub fn script_hash(&self) -> ScriptHash {
-        ScriptHash::hash(self.as_bytes())
-    }
-
-    /// Returns 256-bit hash of the script for P2WSH outputs.
-    pub fn wscript_hash(&self) -> WScriptHash {
-        WScriptHash::hash(self.as_bytes())
-    }
-
-    /// Returns the length in bytes of the script.
-    pub fn len(&self) -> usize { self.0.len() }
-
-    /// Returns whether the script is the empty script.
-    pub fn is_empty(&self) -> bool { self.0.is_empty() }
-
-    /// Returns the script data as a byte slice.
-    pub fn as_bytes(&self) -> &[u8] { &*self.0 }
-
-    /// Returns a copy of the script data.
-    pub fn to_bytes(&self) -> Vec<u8> { self.0.clone().into_vec() }
-
-    /// Converts the script into a byte vector.
-    pub fn into_bytes(self) -> Vec<u8> { self.0.into_vec() }
-
-    /// Computes the P2SH output corresponding to this redeem script.
-    pub fn to_p2sh(&self) -> Script {
-        Script::new_p2sh(&self.script_hash())
-    }
-
-    /// Returns the script code used for spending a P2WPKH output if this script is a script pubkey
-    /// for a P2WPKH output. The `scriptCode` is described in [BIP143].
-    ///
-    /// [BIP143]: <https://github.com/bitcoin/bips/blob/99701f68a88ce33b2d0838eb84e115cef505b4c2/bip-0143.mediawiki>
-    pub fn p2wpkh_script_code(&self) -> Option<Script> {
-        if !self.is_v0_p2wpkh() {
-            return None
-        }
-        let script = Builder::new()
-            .push_opcode(opcodes::all::OP_DUP)
-            .push_opcode(opcodes::all::OP_HASH160)
-            .push_slice(&self[2..]) // The `self` script is 0x00, 0x14, <pubkey_hash>
-            .push_opcode(opcodes::all::OP_EQUALVERIFY)
-            .push_opcode(opcodes::all::OP_CHECKSIG)
-            .into_script();
-
-        Some(script)
-    }
-
-    /// Computes the P2WSH output corresponding to this witnessScript (aka the "witness redeem
-    /// script").
-    pub fn to_v0_p2wsh(&self) -> Script {
-        Script::new_v0_p2wsh(&self.wscript_hash())
-    }
-
-    /// Computes P2TR output with a given internal key and a single script spending path equal to
-    /// the current script, assuming that the script is a Tapscript.
-    #[inline]
-    pub fn to_v1_p2tr<C: Verification>(&self, secp: &Secp256k1<C>, internal_key: UntweakedPublicKey) -> Script {
-        let leaf_hash = TapLeafHash::from_script(&self, LeafVersion::TapScript);
-        let merkle_root = TapBranchHash::from_inner(leaf_hash.into_inner());
-        Script::new_v1_p2tr(&secp, internal_key, Some(merkle_root))
-    }
-
-    /// Returns witness version of the script, if any, assuming the script is a `scriptPubkey`.
-    #[inline]
-    pub fn witness_version(&self) -> Option<WitnessVersion> {
-        self.0.get(0).and_then(|opcode| WitnessVersion::from_opcode(opcodes::All::from(*opcode)).ok())
-    }
-
-    /// Checks whether a script pubkey is a P2SH output.
-    #[inline]
-    pub fn is_p2sh(&self) -> bool {
-        self.0.len() == 23
-            && self.0[0] == opcodes::all::OP_HASH160.into_u8()
-            && self.0[1] == opcodes::all::OP_PUSHBYTES_20.into_u8()
-            && self.0[22] == opcodes::all::OP_EQUAL.into_u8()
-    }
-
-    /// Checks whether a script pubkey is a P2PKH output.
-    #[inline]
-    pub fn is_p2pkh(&self) -> bool {
-        self.0.len() == 25
-            && self.0[0] == opcodes::all::OP_DUP.into_u8()
-            && self.0[1] == opcodes::all::OP_HASH160.into_u8()
-            && self.0[2] == opcodes::all::OP_PUSHBYTES_20.into_u8()
-            && self.0[23] == opcodes::all::OP_EQUALVERIFY.into_u8()
-            && self.0[24] == opcodes::all::OP_CHECKSIG.into_u8()
-    }
-
-    /// Checks whether a script pubkey is a P2PK output.
-    #[inline]
-    pub fn is_p2pk(&self) -> bool {
-        match self.len() {
-            67 => {
-                self.0[0] == opcodes::all::OP_PUSHBYTES_65.into_u8()
-                    && self.0[66] == opcodes::all::OP_CHECKSIG.into_u8()
-            }
-            35 => {
-                self.0[0] == opcodes::all::OP_PUSHBYTES_33.into_u8()
-                    && self.0[34] == opcodes::all::OP_CHECKSIG.into_u8()
-            }
-            _ => false
-        }
-    }
-
-    /// Checks whether a script pubkey is a Segregated Witness (segwit) program.
-    #[inline]
-    pub fn is_witness_program(&self) -> bool {
-        // A scriptPubKey (or redeemScript as defined in BIP16/P2SH) that consists of a 1-byte
-        // push opcode (for 0 to 16) followed by a data push between 2 and 40 bytes gets a new
-        // special meaning. The value of the first push is called the "version byte". The following
-        // byte vector pushed is called the "witness program".
-        let script_len = self.0.len();
-        if script_len < 4 || script_len > 42 {
-            return false
-        }
-        let ver_opcode = opcodes::All::from(self.0[0]); // Version 0 or PUSHNUM_1-PUSHNUM_16
-        let push_opbyte = self.0[1]; // Second byte push opcode 2-40 bytes
-        WitnessVersion::from_opcode(ver_opcode).is_ok()
-            && push_opbyte >= opcodes::all::OP_PUSHBYTES_2.into_u8()
-            && push_opbyte <= opcodes::all::OP_PUSHBYTES_40.into_u8()
-            // Check that the rest of the script has the correct size
-            && script_len - 2 == push_opbyte as usize
-    }
-
-    /// Checks whether a script pubkey is a P2WSH output.
-    #[inline]
-    pub fn is_v0_p2wsh(&self) -> bool {
-        self.0.len() == 34
-            && self.witness_version() == Some(WitnessVersion::V0)
-            && self.0[1] == opcodes::all::OP_PUSHBYTES_32.into_u8()
-    }
-
-    /// Checks whether a script pubkey is a P2WPKH output.
-    #[inline]
-    pub fn is_v0_p2wpkh(&self) -> bool {
-        self.0.len() == 22
-            && self.witness_version() == Some(WitnessVersion::V0)
-            && self.0[1] == opcodes::all::OP_PUSHBYTES_20.into_u8()
-    }
-
-    /// Checks whether a script pubkey is a P2TR output.
-    #[inline]
-    pub fn is_v1_p2tr(&self) -> bool {
-        self.0.len() == 34
-            && self.witness_version() == Some(WitnessVersion::V1)
-            && self.0[1] == opcodes::all::OP_PUSHBYTES_32.into_u8()
-    }
-
-    /// Check if this is an OP_RETURN output.
-    pub fn is_op_return (&self) -> bool {
-        match self.0.first() {
-            Some(b) => *b == opcodes::all::OP_RETURN.into_u8(),
-            None => false
-        }
-    }
-
-    /// Checks whether a script can be proven to have no satisfying input.
-    pub fn is_provably_unspendable(&self) -> bool {
-        use blockdata::opcodes::Class::{ReturnOp, IllegalOp};
-
-        match self.0.first() {
-            Some(b) => {
-                let first = opcodes::All::from(*b);
-                let class = first.classify(opcodes::ClassifyContext::Legacy);
-
-                class == ReturnOp || class == IllegalOp
-            },
-            None => false,
-        }
-    }
-
-    /// Returns the minimum value an output with this script should have in order to be
-    /// broadcastable on today's Bitcoin network.
-    pub fn dust_value(&self) -> ::Amount {
-        // This must never be lower than Bitcoin Core's GetDustThreshold() (as of v0.21) as it may
-        // otherwise allow users to create transactions which likely can never be broadcast/confirmed.
-        let sats = DUST_RELAY_TX_FEE as u64 / 1000 * // The default dust relay fee is 3000 satoshi/kB (i.e. 3 sat/vByte)
-        if self.is_op_return() {
-            0
-        } else if self.is_witness_program() {
-            32 + 4 + 1 + (107 / 4) + 4 + // The spend cost copied from Core
-            8 + // The serialized size of the TxOut's amount field
-            self.consensus_encode(&mut sink()).expect("sinks don't error") as u64 // The serialized size of this script_pubkey
-        } else {
-            32 + 4 + 1 + 107 + 4 + // The spend cost copied from Core
-            8 + // The serialized size of the TxOut's amount field
-            self.consensus_encode(&mut sink()).expect("sinks don't error") as u64 // The serialized size of this script_pubkey
-        };
-
-        ::Amount::from_sat(sats)
-    }
-
-    /// Iterates over the script in the form of `Instruction`s, which are an enum covering opcodes,
-    /// datapushes and errors.
-    ///
-    /// At most one error will be returned and then the iterator will end. To instead iterate over
-    /// the script as sequence of bytes, treat it as a slice using `script[..]` or convert it to a
-    /// vector using `into_bytes()`.
-    ///
-    /// To force minimal pushes, use [`Self::instructions_minimal`].
-    pub fn instructions(&self) -> Instructions {
-        Instructions {
-            data: &self.0[..],
-            enforce_minimal: false,
-        }
-    }
-
-    /// Iterates over the script in the form of `Instruction`s while enforcing minimal pushes.
-    pub fn instructions_minimal(&self) -> Instructions {
-        Instructions {
-            data: &self.0[..],
-            enforce_minimal: true,
-        }
-    }
-
-    /// Shorthand for [`Self::verify_with_flags`] with flag [bitcoinconsensus::VERIFY_ALL].
-    #[cfg(feature="bitcoinconsensus")]
-    #[cfg_attr(docsrs, doc(cfg(feature = "bitcoinconsensus")))]
-    pub fn verify (&self, index: usize, amount: ::Amount, spending: &[u8]) -> Result<(), Error> {
-        self.verify_with_flags(index, amount, spending, ::bitcoinconsensus::VERIFY_ALL)
-    }
-
-    /// Verifies spend of an input script.
-    ///
-    /// # Parameters
-    ///  * `index` - The input index in spending which is spending this transaction.
-    ///  * `amount` - The amount this script guards.
-    ///  * `spending` - The transaction that attempts to spend the output holding this script.
-    ///  * `flags` - Verification flags, see [`bitcoinconsensus::VERIFY_ALL`] and similar.
-    #[cfg(feature="bitcoinconsensus")]
-    #[cfg_attr(docsrs, doc(cfg(feature = "bitcoinconsensus")))]
-    pub fn verify_with_flags<F: Into<u32>>(&self, index: usize, amount: ::Amount, spending: &[u8], flags: F) -> Result<(), Error> {
-        Ok(bitcoinconsensus::verify_with_flags (&self.0[..], amount.as_sat(), spending, index, flags.into())?)
-    }
-
-    /// Writes the assembly decoding of the script bytes to the formatter.
-    pub fn bytes_to_asm_fmt(script: &[u8], f: &mut dyn fmt::Write) -> fmt::Result {
-        // This has to be a macro because it needs to break the loop
-        macro_rules! read_push_data_len {
-            ($iter:expr, $len:expr, $formatter:expr) => {
-                match read_uint_iter($iter, $len) {
-                    Ok(n) => {
-                        n
-                    },
-                    Err(UintError::EarlyEndOfScript) => {
-                        $formatter.write_str("<unexpected end>")?;
-                        break;
-                    }
-                    // We got the data in a slice which implies it being shorter than `usize::max_value()`
-                    // So if we got overflow, we can confidently say the number is higher than length of
-                    // the slice even though we don't know the exact number. This implies attempt to push
-                    // past end.
-                    Err(UintError::NumericOverflow) => {
-                        $formatter.write_str("<push past end>")?;
-                        break;
-                    }
-                }
-            }
-        }
-
-        let mut iter = script.iter();
-        // Was at least one opcode emitted?
-        let mut at_least_one = false;
-        // `iter` needs to be borrowed in `read_push_data_len`, so we have to use `while let` instead
-        // of `for`.
-        while let Some(byte) = iter.next() {
-            let opcode = opcodes::All::from(*byte);
-
-            let data_len = if let opcodes::Class::PushBytes(n) = opcode.classify(opcodes::ClassifyContext::Legacy) {
-                n as usize
-            } else {
-                match opcode {
-                    opcodes::all::OP_PUSHDATA1 => {
-                        // side effects: may write and break from the loop
-                        read_push_data_len!(&mut iter, 1, f)
-                    }
-                    opcodes::all::OP_PUSHDATA2 => {
-                        // side effects: may write and break from the loop
-                        read_push_data_len!(&mut iter, 2, f)
-                    }
-                    opcodes::all::OP_PUSHDATA4 => {
-                        // side effects: may write and break from the loop
-                        read_push_data_len!(&mut iter, 4, f)
-                    }
-                    _ => 0
-                }
-            };
-
-            if at_least_one {
-                f.write_str(" ")?;
-            } else {
-                at_least_one = true;
-            }
-            // Write the opcode
-            if opcode == opcodes::all::OP_PUSHBYTES_0 {
-                f.write_str("OP_0")?;
-            } else {
-                write!(f, "{:?}", opcode)?;
-            }
-            // Write any pushdata
-            if data_len > 0 {
-                f.write_str(" ")?;
-                if data_len <= iter.len() {
-                    for ch in iter.by_ref().take(data_len) {
-                        write!(f, "{:02x}", ch)?;
-                    }
-                } else {
-                    f.write_str("<push past end>")?;
-                    break;
-                }
-            }
-        }
-        Ok(())
-    }
-
-    /// Writes the assembly decoding of the script to the formatter.
-    pub fn fmt_asm(&self, f: &mut dyn fmt::Write) -> fmt::Result {
-        Script::bytes_to_asm_fmt(self.as_ref(), f)
-    }
-
-    /// Creates an assembly decoding of the script in the given byte slice.
-    pub fn bytes_to_asm(script: &[u8]) -> String {
-        let mut buf = String::new();
-        Script::bytes_to_asm_fmt(script, &mut buf).unwrap();
-        buf
-    }
-
-    /// Returns the assembly decoding of the script.
-    pub fn asm(&self) -> String {
-        Script::bytes_to_asm(self.as_ref())
-    }
-}
-
-/// Creates a new script from an existing vector.
-impl From<Vec<u8>> for Script {
-    fn from(v: Vec<u8>) -> Script { Script(v.into_boxed_slice()) }
-}
-
-/// A "parsed opcode" which allows iterating over a [`Script`] in a more sensible way.
-#[derive(Debug, PartialEq, Eq, Clone)]
-pub enum Instruction<'a> {
-    /// Push a bunch of data.
-    PushBytes(&'a [u8]),
-    /// Some non-push opcode.
-    Op(opcodes::All),
-}
-
-/// Iterator over a script returning parsed opcodes.
-pub struct Instructions<'a> {
-    data: &'a [u8],
-    enforce_minimal: bool,
-}
-
-impl<'a> Iterator for Instructions<'a> {
-    type Item = Result<Instruction<'a>, Error>;
-
-    fn next(&mut self) -> Option<Result<Instruction<'a>, Error>> {
-        if self.data.is_empty() {
-            return None;
-        }
-
-        // classify parameter does not really matter here since we are only using
-        // it for pushes and nums
-        match opcodes::All::from(self.data[0]).classify(opcodes::ClassifyContext::Legacy) {
-            opcodes::Class::PushBytes(n) => {
-                let n = n as usize;
-                if self.data.len() < n + 1 {
-                    self.data = &[]; // Kill iterator so that it does not return an infinite stream of errors
-                    return Some(Err(Error::EarlyEndOfScript));
-                }
-                if self.enforce_minimal {
-                    if n == 1 && (self.data[1] == 0x81 || (self.data[1] > 0 && self.data[1] <= 16)) {
-                        self.data = &[];
-                        return Some(Err(Error::NonMinimalPush));
-                    }
-                }
-                let ret = Some(Ok(Instruction::PushBytes(&self.data[1..n+1])));
-                self.data = &self.data[n + 1..];
-                ret
-            }
-            opcodes::Class::Ordinary(opcodes::Ordinary::OP_PUSHDATA1) => {
-                if self.data.len() < 2 {
-                    self.data = &[];
-                    return Some(Err(Error::EarlyEndOfScript));
-                }
-                let n = match read_uint(&self.data[1..], 1) {
-                    Ok(n) => n,
-                    Err(e) => {
-                        self.data = &[];
-                        return Some(Err(e));
-                    }
-                };
-                if self.data.len() < n + 2 {
-                    self.data = &[];
-                    return Some(Err(Error::EarlyEndOfScript));
-                }
-                if self.enforce_minimal && n < 76 {
-                    self.data = &[];
-                    return Some(Err(Error::NonMinimalPush));
-                }
-                let ret = Some(Ok(Instruction::PushBytes(&self.data[2..n+2])));
-                self.data = &self.data[n + 2..];
-                ret
-            }
-            opcodes::Class::Ordinary(opcodes::Ordinary::OP_PUSHDATA2) => {
-                if self.data.len() < 3 {
-                    self.data = &[];
-                    return Some(Err(Error::EarlyEndOfScript));
-                }
-                let n = match read_uint(&self.data[1..], 2) {
-                    Ok(n) => n,
-                    Err(e) => {
-                        self.data = &[];
-                        return Some(Err(e));
-                    }
-                };
-                if self.enforce_minimal && n < 0x100 {
-                    self.data = &[];
-                    return Some(Err(Error::NonMinimalPush));
-                }
-                if self.data.len() < n + 3 {
-                    self.data = &[];
-                    return Some(Err(Error::EarlyEndOfScript));
-                }
-                let ret = Some(Ok(Instruction::PushBytes(&self.data[3..n + 3])));
-                self.data = &self.data[n + 3..];
-                ret
-            }
-            opcodes::Class::Ordinary(opcodes::Ordinary::OP_PUSHDATA4) => {
-                if self.data.len() < 5 {
-                    self.data = &[];
-                    return Some(Err(Error::EarlyEndOfScript));
-                }
-                let n = match read_uint(&self.data[1..], 4) {
-                    Ok(n) => n,
-                    Err(e) => {
-                        self.data = &[];
-                        return Some(Err(e));
-                    }
-                };
-                if self.enforce_minimal && n < 0x10000 {
-                    self.data = &[];
-                    return Some(Err(Error::NonMinimalPush));
-                }
-                if self.data.len() < n + 5 {
-                    self.data = &[];
-                    return Some(Err(Error::EarlyEndOfScript));
-                }
-                let ret = Some(Ok(Instruction::PushBytes(&self.data[5..n + 5])));
-                self.data = &self.data[n + 5..];
-                ret
-            }
-            // Everything else we can push right through
-            _ => {
-                let ret = Some(Ok(Instruction::Op(opcodes::All::from(self.data[0]))));
-                self.data = &self.data[1..];
-                ret
-            }
-        }
-    }
-}
-
-impl<'a> ::core::iter::FusedIterator for Instructions<'a> {}
-
-impl Builder {
-    /// Creates a new empty script.
-    pub fn new() -> Self {
-        Builder(vec![], None)
-    }
-
-    /// Returns the length in bytes of the script.
-    pub fn len(&self) -> usize { self.0.len() }
-
-    /// Checks whether the script is the empty script.
-    pub fn is_empty(&self) -> bool { self.0.is_empty() }
-
-    /// Adds instructions to push an integer onto the stack. Integers are
-    /// encoded as little-endian signed-magnitude numbers, but there are
-    /// dedicated opcodes to push some small integers.
-    pub fn push_int(self, data: i64) -> Builder {
-        // We can special-case -1, 1-16
-        if data == -1 || (data >= 1 && data <= 16) {
-            let opcode = opcodes::All::from(
-                (data - 1 + opcodes::OP_TRUE.into_u8() as i64) as u8
-            );
-            self.push_opcode(opcode)
-        }
-        // We can also special-case zero
-        else if data == 0 {
-            self.push_opcode(opcodes::OP_FALSE)
-        }
-        // Otherwise encode it as data
-        else { self.push_scriptint(data) }
-    }
-
-    /// Adds instructions to push an integer onto the stack, using the explicit
-    /// encoding regardless of the availability of dedicated opcodes.
-    pub fn push_scriptint(self, data: i64) -> Builder {
-        self.push_slice(&build_scriptint(data))
-    }
-
-    /// Adds instructions to push some arbitrary data onto the stack.
-    pub fn push_slice(mut self, data: &[u8]) -> Builder {
-        // Start with a PUSH opcode
-        match data.len() as u64 {
-            n if n < opcodes::Ordinary::OP_PUSHDATA1 as u64 => { self.0.push(n as u8); },
-            n if n < 0x100 => {
-                self.0.push(opcodes::Ordinary::OP_PUSHDATA1.into_u8());
-                self.0.push(n as u8);
-            },
-            n if n < 0x10000 => {
-                self.0.push(opcodes::Ordinary::OP_PUSHDATA2.into_u8());
-                self.0.push((n % 0x100) as u8);
-                self.0.push((n / 0x100) as u8);
-            },
-            n if n < 0x100000000 => {
-                self.0.push(opcodes::Ordinary::OP_PUSHDATA4.into_u8());
-                self.0.push((n % 0x100) as u8);
-                self.0.push(((n / 0x100) % 0x100) as u8);
-                self.0.push(((n / 0x10000) % 0x100) as u8);
-                self.0.push((n / 0x1000000) as u8);
-            }
-            _ => panic!("tried to put a 4bn+ sized object into a script!")
-        }
-        // Then push the raw bytes
-        self.0.extend(data.iter().cloned());
-        self.1 = None;
-        self
-    }
-
-    /// Adds instructions to push a public key onto the stack.
-    pub fn push_key(self, key: &PublicKey) -> Builder {
-        if key.compressed {
-            self.push_slice(&key.inner.serialize()[..])
-        } else {
-            self.push_slice(&key.inner.serialize_uncompressed()[..])
-        }
-    }
-
-    /// Adds instructions to push an XOnly public key onto the stack.
-    pub fn push_x_only_key(self, x_only_key: &XOnlyPublicKey) -> Builder {
-        self.push_slice(&x_only_key.serialize())
-    }
-
-    /// Adds a single opcode to the script.
-    pub fn push_opcode(mut self, data: opcodes::All) -> Builder {
-        self.0.push(data.into_u8());
-        self.1 = Some(data);
-        self
-    }
-
-    /// Adds an `OP_VERIFY` to the script, unless the most-recently-added
-    /// opcode has an alternate `VERIFY` form, in which case that opcode
-    /// is replaced e.g., `OP_CHECKSIG` will become `OP_CHECKSIGVERIFY`.
-    pub fn push_verify(mut self) -> Builder {
-        match self.1 {
-            Some(opcodes::all::OP_EQUAL) => {
-                self.0.pop();
-                self.push_opcode(opcodes::all::OP_EQUALVERIFY)
-            },
-            Some(opcodes::all::OP_NUMEQUAL) => {
-                self.0.pop();
-                self.push_opcode(opcodes::all::OP_NUMEQUALVERIFY)
-            },
-            Some(opcodes::all::OP_CHECKSIG) => {
-                self.0.pop();
-                self.push_opcode(opcodes::all::OP_CHECKSIGVERIFY)
-            },
-            Some(opcodes::all::OP_CHECKMULTISIG) => {
-                self.0.pop();
-                self.push_opcode(opcodes::all::OP_CHECKMULTISIGVERIFY)
-            },
-            _ => self.push_opcode(opcodes::all::OP_VERIFY),
-        }
-    }
-
-    /// Converts the `Builder` into an unmodifiable `Script`.
-    pub fn into_script(self) -> Script {
-        Script(self.0.into_boxed_slice())
-    }
-}
-
-impl Default for Builder {
-    fn default() -> Builder { Builder::new() }
-}
-
-/// Creates a new builder from an existing vector.
-impl From<Vec<u8>> for Builder {
-    fn from(v: Vec<u8>) -> Builder {
-        let script = Script(v.into_boxed_slice());
-        let last_op = match script.instructions().last() {
-            Some(Ok(Instruction::Op(op))) => Some(op),
-            _ => None,
-        };
-        Builder(script.into_bytes(), last_op)
-    }
-}
-
-#[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-impl<'de> serde::Deserialize<'de> for Script {
-    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
-    where
-        D: serde::Deserializer<'de>,
-    {
-        use core::fmt::Formatter;
-        use hashes::hex::FromHex;
-
-        if deserializer.is_human_readable() {
-
-            struct Visitor;
-            impl<'de> serde::de::Visitor<'de> for Visitor {
-                type Value = Script;
-
-                fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
-                    formatter.write_str("a script hex")
-                }
-
-                fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
-                where
-                    E: serde::de::Error,
-                {
-                    let v = Vec::from_hex(v).map_err(E::custom)?;
-                    Ok(Script::from(v))
-                }
-
-                fn visit_borrowed_str<E>(self, v: &'de str) -> Result<Self::Value, E>
-                where
-                    E: serde::de::Error,
-                {
-                    self.visit_str(v)
-                }
-
-                fn visit_string<E>(self, v: String) -> Result<Self::Value, E>
-                where
-                    E: serde::de::Error,
-                {
-                    self.visit_str(&v)
-                }
-            }
-            deserializer.deserialize_str(Visitor)
-        } else {
-            struct BytesVisitor;
-
-            impl<'de> serde::de::Visitor<'de> for BytesVisitor {
-                type Value = Script;
-
-                fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
-                    formatter.write_str("a script Vec<u8>")
-                }
-
-                fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
-                where
-                    E: serde::de::Error,
-                {
-                    Ok(Script::from(v.to_vec()))
-                }
-            }
-            deserializer.deserialize_bytes(BytesVisitor)
-        }
-    }
-}
-
-#[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-impl serde::Serialize for Script {
-    /// User-facing serialization for `Script`.
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: serde::Serializer,
-    {
-        if serializer.is_human_readable() {
-            serializer.serialize_str(&format!("{:x}", self))
-        } else {
-            serializer.serialize_bytes(&self.as_bytes())
-        }
-    }
-}
-
-impl Encodable for Script {
-    #[inline]
-    fn consensus_encode<S: io::Write>(&self, s: S) -> Result<usize, io::Error> {
-        self.0.consensus_encode(s)
-    }
-}
-
-impl Decodable for Script {
-    #[inline]
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Self, encode::Error> {
-        Ok(Script(Decodable::consensus_decode(d)?))
-    }
-}
-
-#[cfg(test)]
-mod test {
-    use core::str::FromStr;
-
-    use super::*;
-    use super::build_scriptint;
-
-    use hashes::hex::{FromHex, ToHex};
-    use consensus::encode::{deserialize, serialize};
-    use blockdata::opcodes;
-    use util::key::PublicKey;
-    use util::psbt::serialize::Serialize;
-
-    #[test]
-    fn script() {
-        let mut comp = vec![];
-        let mut script = Builder::new();
-        assert_eq!(&script[..], &comp[..]);
-
-        // small ints
-        script = script.push_int(1);  comp.push(81u8); assert_eq!(&script[..], &comp[..]);
-        script = script.push_int(0);  comp.push(0u8);  assert_eq!(&script[..], &comp[..]);
-        script = script.push_int(4);  comp.push(84u8); assert_eq!(&script[..], &comp[..]);
-        script = script.push_int(-1); comp.push(79u8); assert_eq!(&script[..], &comp[..]);
-        // forced scriptint
-        script = script.push_scriptint(4); comp.extend([1u8, 4].iter().cloned()); assert_eq!(&script[..], &comp[..]);
-        // big ints
-        script = script.push_int(17); comp.extend([1u8, 17].iter().cloned()); assert_eq!(&script[..], &comp[..]);
-        script = script.push_int(10000); comp.extend([2u8, 16, 39].iter().cloned()); assert_eq!(&script[..], &comp[..]);
-        // notice the sign bit set here, hence the extra zero/128 at the end
-        script = script.push_int(10000000); comp.extend([4u8, 128, 150, 152, 0].iter().cloned()); assert_eq!(&script[..], &comp[..]);
-        script = script.push_int(-10000000); comp.extend([4u8, 128, 150, 152, 128].iter().cloned()); assert_eq!(&script[..], &comp[..]);
-
-        // data
-        script = script.push_slice("NRA4VR".as_bytes()); comp.extend([6u8, 78, 82, 65, 52, 86, 82].iter().cloned()); assert_eq!(&script[..], &comp[..]);
-
-        // keys
-        let keystr = "21032e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af";
-        let key = PublicKey::from_str(&keystr[2..]).unwrap();
-        script = script.push_key(&key); comp.extend(Vec::from_hex(keystr).unwrap().iter().cloned()); assert_eq!(&script[..], &comp[..]);
-        let keystr = "41042e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af191923a2964c177f5b5923ae500fca49e99492d534aa3759d6b25a8bc971b133";
-        let key = PublicKey::from_str(&keystr[2..]).unwrap();
-        script = script.push_key(&key); comp.extend(Vec::from_hex(keystr).unwrap().iter().cloned()); assert_eq!(&script[..], &comp[..]);
-
-        // opcodes
-        script = script.push_opcode(opcodes::all::OP_CHECKSIG); comp.push(0xACu8); assert_eq!(&script[..], &comp[..]);
-        script = script.push_opcode(opcodes::all::OP_CHECKSIG); comp.push(0xACu8); assert_eq!(&script[..], &comp[..]);
-    }
-
-    #[test]
-    fn script_x_only_key() {
-        // Notice the "20" which prepends the keystr. That 20 is hexidecimal for "32". The Builder automatically adds the 32 opcode
-        // to our script in order to give a heads up to the script compiler that it should add the next 32 bytes to the stack.
-        // From: https://github.com/bitcoin-core/btcdeb/blob/e8c2750c4a4702768c52d15640ed03bf744d2601/doc/tapscript-example.md?plain=1#L43
-        let keystr = "209997a497d964fc1a62885b05a51166a65a90df00492c8d7cf61d6accf54803be";
-        let x_only_key = XOnlyPublicKey::from_str(&keystr[2..]).unwrap();
-        let script = Builder::new().push_x_only_key(&x_only_key);
-        assert_eq!(script.0, Vec::from_hex(keystr).unwrap());
-    }
-
-    #[test]
-    fn script_builder() {
-        // from txid 3bb5e6434c11fb93f64574af5d116736510717f2c595eb45b52c28e31622dfff which was in my mempool when I wrote the test
-        let script = Builder::new().push_opcode(opcodes::all::OP_DUP)
-                                   .push_opcode(opcodes::all::OP_HASH160)
-                                   .push_slice(&Vec::from_hex("16e1ae70ff0fa102905d4af297f6912bda6cce19").unwrap())
-                                   .push_opcode(opcodes::all::OP_EQUALVERIFY)
-                                   .push_opcode(opcodes::all::OP_CHECKSIG)
-                                   .into_script();
-        assert_eq!(&format!("{:x}", script), "76a91416e1ae70ff0fa102905d4af297f6912bda6cce1988ac");
-    }
-
-    #[test]
-    fn script_generators() {
-        let pubkey = PublicKey::from_str("0234e6a79c5359c613762d537e0e19d86c77c1666d8c9ab050f23acd198e97f93e").unwrap();
-        assert!(Script::new_p2pk(&pubkey).is_p2pk());
-
-        let pubkey_hash = PubkeyHash::hash(&pubkey.inner.serialize());
-        assert!(Script::new_p2pkh(&pubkey_hash).is_p2pkh());
-
-        let wpubkey_hash = WPubkeyHash::hash(&pubkey.inner.serialize());
-        assert!(Script::new_v0_p2wpkh(&wpubkey_hash).is_v0_p2wpkh());
-
-        let script = Builder::new().push_opcode(opcodes::all::OP_NUMEQUAL)
-                                   .push_verify()
-                                   .into_script();
-        let script_hash = ScriptHash::hash(&script.serialize());
-        let p2sh = Script::new_p2sh(&script_hash);
-        assert!(p2sh.is_p2sh());
-        assert_eq!(script.to_p2sh(), p2sh);
-
-        let wscript_hash = WScriptHash::hash(&script.serialize());
-        let p2wsh = Script::new_v0_p2wsh(&wscript_hash);
-        assert!(p2wsh.is_v0_p2wsh());
-        assert_eq!(script.to_v0_p2wsh(), p2wsh);
-
-        // Test data are taken from the second output of
-        // 2ccb3a1f745eb4eefcf29391460250adda5fab78aaddb902d25d3cd97d9d8e61 transaction
-        let data = Vec::<u8>::from_hex("aa21a9ed20280f53f2d21663cac89e6bd2ad19edbabb048cda08e73ed19e9268d0afea2a").unwrap();
-        let op_return = Script::new_op_return(&data);
-        assert!(op_return.is_op_return());
-        assert_eq!(op_return.to_hex(), "6a24aa21a9ed20280f53f2d21663cac89e6bd2ad19edbabb048cda08e73ed19e9268d0afea2a");
-    }
-
-    #[test]
-    fn script_builder_verify() {
-        let simple = Builder::new()
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", simple), "69");
-        let simple2 = Builder::from(vec![])
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", simple2), "69");
-
-        let nonverify = Builder::new()
-            .push_verify()
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", nonverify), "6969");
-        let nonverify2 = Builder::from(vec![0x69])
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", nonverify2), "6969");
-
-        let equal = Builder::new()
-            .push_opcode(opcodes::all::OP_EQUAL)
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", equal), "88");
-        let equal2 = Builder::from(vec![0x87])
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", equal2), "88");
-
-        let numequal = Builder::new()
-            .push_opcode(opcodes::all::OP_NUMEQUAL)
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", numequal), "9d");
-        let numequal2 = Builder::from(vec![0x9c])
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", numequal2), "9d");
-
-        let checksig = Builder::new()
-            .push_opcode(opcodes::all::OP_CHECKSIG)
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", checksig), "ad");
-        let checksig2 = Builder::from(vec![0xac])
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", checksig2), "ad");
-
-        let checkmultisig = Builder::new()
-            .push_opcode(opcodes::all::OP_CHECKMULTISIG)
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", checkmultisig), "af");
-        let checkmultisig2 = Builder::from(vec![0xae])
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", checkmultisig2), "af");
-
-        let trick_slice = Builder::new()
-            .push_slice(&[0xae]) // OP_CHECKMULTISIG
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", trick_slice), "01ae69");
-        let trick_slice2 = Builder::from(vec![0x01, 0xae])
-            .push_verify()
-            .into_script();
-        assert_eq!(format!("{:x}", trick_slice2), "01ae69");
-   }
-
-    #[test]
-    fn script_serialize() {
-        let hex_script = Vec::from_hex("6c493046022100f93bb0e7d8db7bd46e40132d1f8242026e045f03a0efe71bbb8e3f475e970d790221009337cd7f1f929f00cc6ff01f03729b069a7c21b59b1736ddfee5db5946c5da8c0121033b9b137ee87d5a812d6f506efdd37f0affa7ffc310711c06c7f3e097c9447c52").unwrap();
-        let script: Result<Script, _> = deserialize(&hex_script);
-        assert!(script.is_ok());
-        assert_eq!(serialize(&script.unwrap()), hex_script);
-    }
-
-    #[test]
-    fn scriptint_round_trip() {
-        assert_eq!(build_scriptint(-1), vec![0x81]);
-        assert_eq!(build_scriptint(255), vec![255, 0]);
-        assert_eq!(build_scriptint(256), vec![0, 1]);
-        assert_eq!(build_scriptint(257), vec![1, 1]);
-        assert_eq!(build_scriptint(511), vec![255, 1]);
-        for &i in [10, 100, 255, 256, 1000, 10000, 25000, 200000, 5000000, 1000000000,
-                             (1 << 31) - 1, -((1 << 31) - 1)].iter() {
-            assert_eq!(Ok(i), read_scriptint(&build_scriptint(i)));
-            assert_eq!(Ok(-i), read_scriptint(&build_scriptint(-i)));
-        }
-        assert!(read_scriptint(&build_scriptint(1 << 31)).is_err());
-        assert!(read_scriptint(&build_scriptint(-(1 << 31))).is_err());
-    }
-
-    #[test]
-    fn script_hashes() {
-        let script = hex_script!("410446ef0102d1ec5240f0d061a4246c1bdef63fc3dbab7733052fbbf0ecd8f41fc26bf049ebb4f9527f374280259e7cfa99c48b0e3f39c51347a19a5819651503a5ac");
-        assert_eq!(script.script_hash().to_hex(), "8292bcfbef1884f73c813dfe9c82fd7e814291ea");
-        assert_eq!(script.wscript_hash().to_hex(), "3e1525eb183ad4f9b3c5fa3175bdca2a52e947b135bbb90383bf9f6408e2c324");
-    }
-
-    #[test]
-    fn provably_unspendable_test() {
-        // p2pk
-        assert_eq!(hex_script!("410446ef0102d1ec5240f0d061a4246c1bdef63fc3dbab7733052fbbf0ecd8f41fc26bf049ebb4f9527f374280259e7cfa99c48b0e3f39c51347a19a5819651503a5ac").is_provably_unspendable(), false);
-        assert_eq!(hex_script!("4104ea1feff861b51fe3f5f8a3b12d0f4712db80e919548a80839fc47c6a21e66d957e9c5d8cd108c7a2d2324bad71f9904ac0ae7336507d785b17a2c115e427a32fac").is_provably_unspendable(), false);
-        // p2pkhash
-        assert_eq!(hex_script!("76a914ee61d57ab51b9d212335b1dba62794ac20d2bcf988ac").is_provably_unspendable(), false);
-        assert_eq!(hex_script!("6aa9149eb21980dc9d413d8eac27314938b9da920ee53e87").is_provably_unspendable(), true);
-    }
-
-    #[test]
-    fn op_return_test() {
-        assert_eq!(hex_script!("6aa9149eb21980dc9d413d8eac27314938b9da920ee53e87").is_op_return(), true);
-        assert_eq!(hex_script!("76a914ee61d57ab51b9d212335b1dba62794ac20d2bcf988ac").is_op_return(), false);
-        assert_eq!(hex_script!("").is_op_return(), false);
-    }
-
-    #[test]
-    #[cfg(feature = "serde")]
-    fn script_json_serialize() {
-        use serde_json;
-
-        let original = hex_script!("827651a0698faaa9a8a7a687");
-        let json = serde_json::to_value(&original).unwrap();
-        assert_eq!(json, serde_json::Value::String("827651a0698faaa9a8a7a687".to_owned()));
-        let des = serde_json::from_value(json).unwrap();
-        assert_eq!(original, des);
-    }
-
-    #[test]
-    fn script_asm() {
-        assert_eq!(hex_script!("6363636363686868686800").asm(),
-                   "OP_IF OP_IF OP_IF OP_IF OP_IF OP_ENDIF OP_ENDIF OP_ENDIF OP_ENDIF OP_ENDIF OP_0");
-        assert_eq!(hex_script!("6363636363686868686800").asm(),
-                   "OP_IF OP_IF OP_IF OP_IF OP_IF OP_ENDIF OP_ENDIF OP_ENDIF OP_ENDIF OP_ENDIF OP_0");
-        assert_eq!(hex_script!("2102715e91d37d239dea832f1460e91e368115d8ca6cc23a7da966795abad9e3b699ac").asm(),
-                   "OP_PUSHBYTES_33 02715e91d37d239dea832f1460e91e368115d8ca6cc23a7da966795abad9e3b699 OP_CHECKSIG");
-        // Elements Alpha peg-out transaction with some signatures removed for brevity. Mainly to test PUSHDATA1
-        assert_eq!(hex_script!("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").asm(),
-                   "OP_0 OP_PUSHBYTES_71 304402202457e78cc1b7f50d0543863c27de75d07982bde8359b9e3316adec0aec165f2f02200203fd331c4e4a4a02f48cf1c291e2c0d6b2f7078a784b5b3649fca41f8794d401 OP_0 OP_PUSHDATA1 552103244e602b46755f24327142a0517288cebd159eccb6ccf41ea6edf1f601e9af952103bbbacc302d19d29dbfa62d23f37944ae19853cf260c745c2bea739c95328fcb721039227e83246bd51140fe93538b2301c9048be82ef2fb3c7fc5d78426ed6f609ad210229bf310c379b90033e2ecb07f77ecf9b8d59acb623ab7be25a0caed539e2e6472103703e2ed676936f10b3ce9149fa2d4a32060fb86fa9a70a4efe3f21d7ab90611921031e9b7c6022400a6bb0424bbcde14cff6c016b91ee3803926f3440abf5c146d05210334667f975f55a8455d515a2ef1c94fdfa3315f12319a14515d2a13d82831f62f57ae");
-        // Various weird scripts found in transaction 6d7ed9914625c73c0288694a6819196a27ef6c08f98e1270d975a8e65a3dc09a
-        // which triggerred overflow bugs on 32-bit machines in script formatting in the past.
-        assert_eq!(hex_script!("01").asm(),
-                   "OP_PUSHBYTES_1 <push past end>");
-        assert_eq!(hex_script!("0201").asm(),
-                   "OP_PUSHBYTES_2 <push past end>");
-        assert_eq!(hex_script!("4c").asm(),
-                   "<unexpected end>");
-        assert_eq!(hex_script!("4c0201").asm(),
-                   "OP_PUSHDATA1 <push past end>");
-        assert_eq!(hex_script!("4d").asm(),
-                   "<unexpected end>");
-        assert_eq!(hex_script!("4dffff01").asm(),
-                   "OP_PUSHDATA2 <push past end>");
-        assert_eq!(hex_script!("4effffffff01").asm(),
-                   "OP_PUSHDATA4 <push past end>");
-    }
-
-    #[test]
-    fn script_p2sh_p2p2k_template() {
-        // random outputs I picked out of the mempool
-        assert!(hex_script!("76a91402306a7c23f3e8010de41e9e591348bb83f11daa88ac").is_p2pkh());
-        assert!(!hex_script!("76a91402306a7c23f3e8010de41e9e591348bb83f11daa88ac").is_p2sh());
-        assert!(!hex_script!("76a91402306a7c23f3e8010de41e9e591348bb83f11daa88ad").is_p2pkh());
-        assert!(!hex_script!("").is_p2pkh());
-        assert!(hex_script!("a914acc91e6fef5c7f24e5c8b3f11a664aa8f1352ffd87").is_p2sh());
-        assert!(!hex_script!("a914acc91e6fef5c7f24e5c8b3f11a664aa8f1352ffd87").is_p2pkh());
-        assert!(!hex_script!("a314acc91e6fef5c7f24e5c8b3f11a664aa8f1352ffd87").is_p2sh());
-    }
-
-    #[test]
-    fn script_p2pk() {
-        assert!(hex_script!("21021aeaf2f8638a129a3156fbe7e5ef635226b0bafd495ff03afe2c843d7e3a4b51ac").is_p2pk());
-        assert!(hex_script!("410496b538e853519c726a2c91e61ec11600ae1390813a627c66fb8be7947be63c52da7589379515d4e0a604f8141781e62294721166bf621e73a82cbf2342c858eeac").is_p2pk());
-    }
-
-    #[test]
-    fn p2sh_p2wsh_conversion() {
-        // Test vectors taken from Core tests/data/script_tests.json
-        // bare p2wsh
-        let redeem_script = hex_script!("410479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8ac");
-        let expected_witout = hex_script!("0020b95237b48faaa69eb078e1170be3b5cbb3fddf16d0a991e14ad274f7b33a4f64");
-        assert!(redeem_script.to_v0_p2wsh().is_v0_p2wsh());
-        assert_eq!(redeem_script.to_v0_p2wsh(), expected_witout);
-
-        // p2sh
-        let redeem_script = hex_script!("0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8");
-        let expected_p2shout = hex_script!("a91491b24bf9f5288532960ac687abb035127b1d28a587");
-        assert!(redeem_script.to_p2sh().is_p2sh());
-        assert_eq!(redeem_script.to_p2sh(), expected_p2shout);
-
-        // p2sh-p2wsh
-        let redeem_script = hex_script!("410479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8ac");
-        let expected_witout = hex_script!("0020b95237b48faaa69eb078e1170be3b5cbb3fddf16d0a991e14ad274f7b33a4f64");
-        let expected_out = hex_script!("a914f386c2ba255cc56d20cfa6ea8b062f8b5994551887");
-        assert!(redeem_script.to_p2sh().is_p2sh());
-        assert!(redeem_script.to_p2sh().to_v0_p2wsh().is_v0_p2wsh());
-        assert_eq!(redeem_script.to_v0_p2wsh(), expected_witout);
-        assert_eq!(redeem_script.to_v0_p2wsh().to_p2sh(), expected_out);
-    }
-
-    #[test]
-    fn test_iterator() {
-        let zero = hex_script!("00");
-        let zeropush = hex_script!("0100");
-
-        let nonminimal = hex_script!("4c0169b2");      // PUSHDATA1 for no reason
-        let minimal = hex_script!("0169b2");           // minimal
-        let nonminimal_alt = hex_script!("026900b2");  // non-minimal number but minimal push (should be OK)
-
-        let v_zero: Result<Vec<Instruction>, Error> = zero.instructions_minimal().collect();
-        let v_zeropush: Result<Vec<Instruction>, Error> = zeropush.instructions_minimal().collect();
-
-        let v_min: Result<Vec<Instruction>, Error> = minimal.instructions_minimal().collect();
-        let v_nonmin: Result<Vec<Instruction>, Error> = nonminimal.instructions_minimal().collect();
-        let v_nonmin_alt: Result<Vec<Instruction>, Error> = nonminimal_alt.instructions_minimal().collect();
-        let slop_v_min: Result<Vec<Instruction>, Error> = minimal.instructions().collect();
-        let slop_v_nonmin: Result<Vec<Instruction>, Error> = nonminimal.instructions().collect();
-        let slop_v_nonmin_alt: Result<Vec<Instruction>, Error> = nonminimal_alt.instructions().collect();
-
-        assert_eq!(v_zero.unwrap(), vec![Instruction::PushBytes(&[])]);
-        assert_eq!(v_zeropush.unwrap(), vec![Instruction::PushBytes(&[0])]);
-
-        assert_eq!(
-            v_min.clone().unwrap(),
-            vec![Instruction::PushBytes(&[105]), Instruction::Op(opcodes::OP_NOP3)]
-        );
-
-        assert_eq!(v_nonmin.err().unwrap(), Error::NonMinimalPush);
-
-        assert_eq!(
-            v_nonmin_alt.clone().unwrap(),
-            vec![Instruction::PushBytes(&[105, 0]), Instruction::Op(opcodes::OP_NOP3)]
-        );
-
-        assert_eq!(v_min.clone().unwrap(), slop_v_min.unwrap());
-        assert_eq!(v_min.unwrap(), slop_v_nonmin.unwrap());
-        assert_eq!(v_nonmin_alt.unwrap(), slop_v_nonmin_alt.unwrap());
-    }
-
-	#[test]
-    fn script_ord() {
-        let script_1 = Builder::new().push_slice(&[1, 2, 3, 4]).into_script();
-        let script_2 = Builder::new().push_int(10).into_script();
-        let script_3 = Builder::new().push_int(15).into_script();
-        let script_4 = Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script();
-
-        assert!(script_1 < script_2);
-        assert!(script_2 < script_3);
-        assert!(script_3 < script_4);
-
-        assert!(script_1 <= script_1);
-        assert!(script_1 >= script_1);
-
-        assert!(script_4 > script_3);
-        assert!(script_3 > script_2);
-        assert!(script_2 > script_1);
-    }
-
-	#[test]
-	#[cfg(feature = "bitcoinconsensus")]
-	fn test_bitcoinconsensus () {
-		// a random segwit transaction from the blockchain using native segwit
-		let spent = Builder::from(Vec::from_hex("0020701a8d401c84fb13e6baf169d59684e17abd9fa216c8cc5b9fc63d622ff8c58d").unwrap()).into_script();
-		let spending = Vec::from_hex("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").unwrap();
-		spent.verify(0, ::Amount::from_sat(18393430), spending.as_slice()).unwrap();
-	}
-
-    #[test]
-    fn defult_dust_value_tests() {
-        // Check that our dust_value() calculator correctly calculates the dust limit on common
-        // well-known scriptPubKey types.
-        let script_p2wpkh = Builder::new().push_int(0).push_slice(&[42; 20]).into_script();
-        assert!(script_p2wpkh.is_v0_p2wpkh());
-        assert_eq!(script_p2wpkh.dust_value(), ::Amount::from_sat(294));
-
-        let script_p2pkh = Builder::new()
-            .push_opcode(opcodes::all::OP_DUP)
-            .push_opcode(opcodes::all::OP_HASH160)
-            .push_slice(&[42; 20])
-            .push_opcode(opcodes::all::OP_EQUALVERIFY)
-            .push_opcode(opcodes::all::OP_CHECKSIG)
-            .into_script();
-        assert!(script_p2pkh.is_p2pkh());
-        assert_eq!(script_p2pkh.dust_value(), ::Amount::from_sat(546));
-    }
-
-    #[test]
-    #[cfg(feature = "serde")]
-    fn test_script_serde_human_and_not() {
-        let script = Script::from(vec![0u8, 1u8, 2u8]);
-
-        // Serialize
-        let json = ::serde_json::to_string(&script).unwrap();
-        assert_eq!(json, "\"000102\"");
-        let bincode = ::bincode::serialize(&script).unwrap();
-        assert_eq!(bincode, [3, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2]); // bincode adds u64 for length, serde_cbor use varint
-
-        // Deserialize
-        assert_eq!(script, ::serde_json::from_str(&json).unwrap());
-        assert_eq!(script, ::bincode::deserialize(&bincode).unwrap());
-    }
-
-    #[test]
-    fn test_instructions_are_fused() {
-        let script = Script::new();
-        let mut instructions = script.instructions();
-        assert!(instructions.next().is_none());
-        assert!(instructions.next().is_none());
-        assert!(instructions.next().is_none());
-        assert!(instructions.next().is_none());
-    }
-
-    #[test]
-    fn read_scriptbool_zero_is_false() {
-        let v: Vec<u8> = vec![0x00, 0x00, 0x00, 0x00];
-        assert!(!read_scriptbool(&v));
-
-        let v: Vec<u8> = vec![0x00, 0x00, 0x00, 0x80]; // With sign bit set.
-        assert!(!read_scriptbool(&v));
-    }
-
-    #[test]
-    fn read_scriptbool_non_zero_is_true() {
-        let v: Vec<u8> = vec![0x01, 0x00, 0x00, 0x00];
-        assert!(read_scriptbool(&v));
-
-        let v: Vec<u8> = vec![0x01, 0x00, 0x00, 0x80]; // With sign bit set.
-        assert!(read_scriptbool(&v));
-    }
-}
-
diff --git a/src/blockdata/transaction/outpoint.rs b/src/blockdata/transaction/outpoint.rs
deleted file mode 100644
index 4cd013b9b..000000000
--- a/src/blockdata/transaction/outpoint.rs
+++ /dev/null
@@ -1,295 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Refactored for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Dash Outpoints.
-//!
-//! An outpoint is a reference to one of the indexed destinations of a transaction.
-//!
-
-#[cfg(feature = "std")] use std::error;
-use core::convert::TryInto;
-use core::fmt;
-use io;
-use hashes::Hash;
-use hashes::hex::FromHex;
-use consensus::{Decodable, Encodable, encode};
-use Txid;
-
-/// A reference to a transaction output.
-#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
-pub struct OutPoint {
-    /// The referenced transaction's txid.
-    pub txid: Txid,
-    /// The index of the referenced output in its transaction's vout.
-    pub vout: u32,
-}
-serde_struct_human_string_impl!(OutPoint, "an OutPoint", txid, vout);
-
-impl OutPoint {
-    /// Creates a new [`OutPoint`].
-    #[inline]
-    pub fn new(txid: Txid, vout: u32) -> OutPoint {
-        OutPoint { txid, vout }
-    }
-
-    /// Creates a "null" `OutPoint`.
-    ///
-    /// This value is used for coinbase transactions because they don't have any previous outputs.
-    #[inline]
-    pub fn null() -> OutPoint {
-        OutPoint {
-            txid: Default::default(),
-            vout: u32::max_value(),
-        }
-    }
-
-    /// Checks if an `OutPoint` is "null".
-    ///
-    /// # Examples
-    ///
-    /// ```rust
-    /// use dashcore::blockdata::constants::genesis_block;
-    /// use dashcore::network::constants::Network;
-    ///
-    /// let block = genesis_block(Network::Dash);
-    /// let tx = &block.txdata[0];
-    ///
-    /// // Coinbase transactions don't have any previous output.
-    /// assert!(tx.input[0].previous_output.is_null());
-    /// ```
-    #[inline]
-    pub fn is_null(&self) -> bool {
-        *self == OutPoint::null()
-    }
-}
-
-impl From<[u8; 36]> for OutPoint {
-    fn from(buffer: [u8; 36]) -> Self {
-        let tx_id: [u8; 32] = buffer[0..32].try_into().unwrap();
-        let index: [u8; 4] = buffer[32..36].try_into().unwrap();
-
-        Self {
-            txid: Txid::from_inner(tx_id),
-            vout: u32::from_le_bytes(index)
-        }
-    }
-}
-
-impl Default for OutPoint {
-    fn default() -> Self {
-        OutPoint::null()
-    }
-}
-
-impl fmt::Display for OutPoint {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}:{}", self.txid, self.vout)
-    }
-}
-
-impl Encodable for OutPoint {
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let len = self.txid.consensus_encode(&mut s)?;
-        Ok(len + self.vout.consensus_encode(s)?)
-    }
-}
-impl Decodable for OutPoint {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        Ok(OutPoint {
-            txid: Decodable::consensus_decode(&mut d)?,
-            vout: Decodable::consensus_decode(d)?,
-        })
-    }
-}
-
-/// An error in parsing an OutPoint.
-#[derive(Clone, PartialEq, Eq, Debug)]
-pub enum ParseOutPointError {
-    /// Error in TXID part.
-    Txid(hashes::hex::Error),
-    /// Error in vout part.
-    Vout(::core::num::ParseIntError),
-    /// Error in general format.
-    Format,
-    /// Size exceeds max.
-    TooLong,
-    /// Vout part is not strictly numeric without leading zeroes.
-    VoutNotCanonical,
-}
-
-
-impl ::core::str::FromStr for OutPoint {
-    type Err = ParseOutPointError;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        if s.len() > 75 { // 64 + 1 + 10
-            return Err(ParseOutPointError::TooLong);
-        }
-        let find = s.find(':');
-        if find == None || find != s.rfind(':') {
-            return Err(ParseOutPointError::Format);
-        }
-        let colon = find.unwrap();
-        if colon == 0 || colon == s.len() - 1 {
-            return Err(ParseOutPointError::Format);
-        }
-        Ok(OutPoint {
-            txid: Txid::from_hex(&s[..colon]).map_err(ParseOutPointError::Txid)?,
-            vout: parse_vout(&s[colon+1..])?,
-        })
-    }
-}
-
-impl fmt::Display for ParseOutPointError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            ParseOutPointError::Txid(ref e) => write!(f, "error parsing TXID: {}", e),
-            ParseOutPointError::Vout(ref e) => write!(f, "error parsing vout: {}", e),
-            ParseOutPointError::Format => write!(f, "OutPoint not in <txid>:<vout> format"),
-            ParseOutPointError::TooLong => write!(f, "vout should be at most 10 digits"),
-            ParseOutPointError::VoutNotCanonical => write!(f, "no leading zeroes or + allowed in vout part"),
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl error::Error for ParseOutPointError {
-    fn cause(&self) -> Option<&dyn  error::Error> {
-        match *self {
-            ParseOutPointError::Txid(ref e) => Some(e),
-            ParseOutPointError::Vout(ref e) => Some(e),
-            _ => None,
-        }
-    }
-}
-
-/// Parses a string-encoded transaction index (vout).
-/// Does not permit leading zeroes or non-digit characters.
-fn parse_vout(s: &str) -> Result<u32, ParseOutPointError> {
-    if s.len() > 1 {
-        let first = s.chars().next().unwrap();
-        if first == '0' || first == '+' {
-            return Err(ParseOutPointError::VoutNotCanonical);
-        }
-    }
-    s.parse().map_err(ParseOutPointError::Vout)
-}
-
-#[cfg(test)]
-mod tests {
-    use core::str::FromStr;
-    use Transaction;
-    use super::*;
-
-    #[test]
-    fn test_outpoint() {
-        assert_eq!(OutPoint::from_str("i don't care"),
-                   Err(ParseOutPointError::Format));
-        assert_eq!(OutPoint::from_str("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:1:1"),
-                   Err(ParseOutPointError::Format));
-        assert_eq!(OutPoint::from_str("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:"),
-                   Err(ParseOutPointError::Format));
-        assert_eq!(OutPoint::from_str("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:11111111111"),
-                   Err(ParseOutPointError::TooLong));
-        assert_eq!(OutPoint::from_str("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:01"),
-                   Err(ParseOutPointError::VoutNotCanonical));
-        assert_eq!(OutPoint::from_str("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:+42"),
-                   Err(ParseOutPointError::VoutNotCanonical));
-        assert_eq!(OutPoint::from_str("i don't care:1"),
-                   Err(ParseOutPointError::Txid(Txid::from_hex("i don't care").unwrap_err())));
-        assert_eq!(OutPoint::from_str("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c945X:1"),
-                   Err(ParseOutPointError::Txid(Txid::from_hex("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c945X").unwrap_err())));
-        assert_eq!(OutPoint::from_str("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:lol"),
-                   Err(ParseOutPointError::Vout(u32::from_str("lol").unwrap_err())));
-
-        assert_eq!(OutPoint::from_str("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:42"),
-                   Ok(OutPoint {
-                       txid: Txid::from_hex("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456").unwrap(),
-                       vout: 42,
-                   }));
-        assert_eq!(OutPoint::from_str("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456:0"),
-                   Ok(OutPoint {
-                       txid: Txid::from_hex("5df6e0e2761359d30a8275058e299fcc0381534545f55cf43e41983f5d4c9456").unwrap(),
-                       vout: 0,
-                   }));
-    }
-
-
-    #[test]
-    fn out_point_buffer() {
-        let mut tx = Transaction {
-            version: 0,
-            lock_time: 0,
-            input: vec![],
-            output: vec![],
-            special_transaction_payload: None
-        };
-
-        let pk_data = Vec::from_hex("b8e2d839dd21088b78bebfea3e3e632181197982").unwrap();
-
-        let mut pk_array: [u8; 20] = [0; 20];
-        for (index, kek) in pk_array.iter_mut().enumerate() {
-            *kek = *pk_data.get(index).unwrap();
-        }
-
-        tx.add_burn_output(10000, &pk_array);
-
-        let mut expected_buf = tx.txid().as_inner().to_vec();
-        let mut expected_index = vec![0,0,0,0];
-        // 0 serialized as 32 bits
-        expected_buf.append(&mut expected_index);
-
-        let out_point_buffer = tx.out_point_buffer(0).unwrap();
-
-        assert_eq!(out_point_buffer.to_vec(), expected_buf);
-
-        assert!(tx.out_point_buffer(1).is_none());
-    }
-
-    #[test]
-    fn out_point_parse() {
-        let mut tx = Transaction {
-            version: 0,
-            lock_time: 0,
-            input: vec![],
-            output: vec![],
-            special_transaction_payload: None
-        };
-
-        let pk_data = Vec::from_hex("b8e2d839dd21088b78bebfea3e3e632181197982").unwrap();
-
-        let mut pk_array: [u8; 20] = [0; 20];
-        for (index, kek) in pk_array.iter_mut().enumerate() {
-            *kek = *pk_data.get(index).unwrap();
-        }
-
-        tx.add_burn_output(10000, &pk_array);
-
-        let mut expected_buf = tx.txid().as_inner().to_vec();
-        let mut expected_index = vec![0,0,0,0];
-        // 0 serialized as 32 bits
-        expected_buf.append(&mut expected_index);
-
-        let out_point_buffer = tx.out_point_buffer(0).unwrap();
-
-        let out_point = OutPoint::from(out_point_buffer);
-
-        assert_eq!(out_point.vout, 0);
-        assert_eq!(out_point.txid, tx.txid());
-    }
-}
\ No newline at end of file
diff --git a/src/blockdata/transaction/special_transaction/asset_lock.rs b/src/blockdata/transaction/special_transaction/asset_lock.rs
deleted file mode 100644
index 6bbb42a40..000000000
--- a/src/blockdata/transaction/special_transaction/asset_lock.rs
+++ /dev/null
@@ -1,63 +0,0 @@
-// Rust Dash Library
-// Written for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Dash Asset Lock Special Transaction.
-//!
-//! The asset lock special transaction is used to add to the asset lock credit pool.
-//!
-//!
-//! It is defined in DIPX https://github.com/dashpay/dips/blob/master/dip-000X.md as follows:
-//!
-//!
-//! The special transaction type used for AssetLockTx Transactions is 8.
-
-use prelude::*;
-use io;
-use io::{Error, Write};
-use consensus::{Decodable, Encodable, encode};
-use TxOut;
-
-/// An Asset Lock payload. This is contained as the payload of an asset lock special transaction.
-/// The Asset Lock Special transaction and this payload is described in the Asset Lock DIP2X
-/// (todo:update this).
-/// An Asset Lock can fund multiple Identity registrations or top ups.
-/// The Asset Lock payload credit outputs field contains a vector of TxOuts.
-/// Each TxOut refers to a funding of an Identity.
-///
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct AssetLockPayload {
-    version: u8,
-    credit_outputs: Vec<TxOut>,
-}
-
-impl Encodable for AssetLockPayload {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
-        let mut len = 0;
-        len += self.version.consensus_encode(&mut s)?;
-        len += self.credit_outputs.consensus_encode(&mut s)?;
-        Ok(len)
-    }
-}
-
-impl Decodable for AssetLockPayload {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let version = u8::consensus_decode(&mut d)?;
-        let credit_outputs = Vec::<TxOut>::consensus_decode(&mut d)?;
-        Ok(AssetLockPayload {
-            version,
-            credit_outputs,
-        })
-    }
-}
\ No newline at end of file
diff --git a/src/blockdata/transaction/special_transaction/coinbase.rs b/src/blockdata/transaction/special_transaction/coinbase.rs
deleted file mode 100644
index fb699707a..000000000
--- a/src/blockdata/transaction/special_transaction/coinbase.rs
+++ /dev/null
@@ -1,67 +0,0 @@
-// Rust Dash Library
-// Written for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Dash Coinbase Special Transaction.
-//!
-//! Each time a block is mined it includes a coinbase special transaction.
-//! It is defined in DIP4 https://github.com/dashpay/dips/blob/master/dip-0004.md.
-//!
-
-use io;
-use io::{Error, Write};
-use ::{MerkleRootMasternodeList, MerkleRootQuorums};
-use consensus::{Decodable, Encodable, encode};
-
-/// A Coinbase payload. This is contained as the payload of a coinbase special transaction.
-/// The Coinbase payload is described in DIP4.
-///
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct CoinbasePayload {
-    version: u16,
-    height: u32,
-    merkle_root_masternode_list: MerkleRootMasternodeList,
-    merkle_root_quorums: MerkleRootQuorums,
-}
-
-impl Encodable for CoinbasePayload {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
-        let mut len = 0;
-        len += self.version.consensus_encode(&mut s)?;
-        len += self.height.consensus_encode(&mut s)?;
-        len += self.merkle_root_masternode_list.consensus_encode(&mut s)?;
-        len += self.merkle_root_quorums.consensus_encode(&mut s)?;
-        Ok(len)
-    }
-}
-
-impl Decodable for CoinbasePayload {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let version = u16::consensus_decode(&mut d)?;
-        let height = u32::consensus_decode(&mut d)?;
-        let merkle_root_masternode_list = MerkleRootMasternodeList::consensus_decode(&mut d)?;
-        let merkle_root_quorums = MerkleRootQuorums::consensus_decode(&mut d)?;
-        Ok(CoinbasePayload {
-            version,
-            height,
-            merkle_root_masternode_list,
-            merkle_root_quorums
-        })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-
-}
\ No newline at end of file
diff --git a/src/blockdata/transaction/special_transaction/quorum_commitment.rs b/src/blockdata/transaction/special_transaction/quorum_commitment.rs
deleted file mode 100644
index 79d1e8f3d..000000000
--- a/src/blockdata/transaction/special_transaction/quorum_commitment.rs
+++ /dev/null
@@ -1,129 +0,0 @@
-// Rust Dash Library
-// Written for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Dash Quorum Commitment Special Transaction.
-//!
-//! It is defined in DIP6 https://github.com/dashpay/dips/blob/master/dip-0006.md.
-//!
-
-use prelude::*;
-use io;
-use io::{Error, Write};
-use ::{QuorumHash};
-use bls_sig_utils::{BLSPublicKey, BLSSignature};
-use consensus::{Decodable, Encodable, encode};
-use QuorumVVecHash;
-
-
-
-
-/// A Quorum Finalization Commitment. It is described in the finalization section of DIP6:
-/// https://github.com/dashpay/dips/blob/master/dip-0006.md#6-finalization-phase
-///
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct QuorumFinalizationCommitment {
-    version: u16,
-    llmq_type: u8,
-    quorum_hash: QuorumHash,
-    signers: Vec<u8>,
-    valid_members: Vec<u8>,
-    quorum_public_key: BLSPublicKey,
-    quorum_vvec_hash: QuorumVVecHash,
-    quorum_sig: BLSSignature,
-    sig: BLSSignature,
-}
-
-impl Encodable for QuorumFinalizationCommitment {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
-        let mut len = 0;
-        len += self.version.consensus_encode(&mut s)?;
-        len += self.llmq_type.consensus_encode(&mut s)?;
-        len += self.quorum_hash.consensus_encode(&mut s)?;
-        len += self.signers.consensus_encode(&mut s)?;
-        len += self.valid_members.consensus_encode(&mut s)?;
-        len += self.quorum_public_key.consensus_encode(&mut s)?;
-        len += self.quorum_vvec_hash.consensus_encode(&mut s)?;
-        len += self.quorum_sig.consensus_encode(&mut s)?;
-        len += self.sig.consensus_encode(&mut s)?;
-        Ok(len)
-    }
-}
-
-impl Decodable for QuorumFinalizationCommitment {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let version = u16::consensus_decode(&mut d)?;
-        let llmq_type = u8::consensus_decode(&mut d)?;
-        let quorum_hash = QuorumHash::consensus_decode(&mut d)?;
-        let signers = Vec::<u8>::consensus_decode(&mut d)?;
-        let valid_members = Vec::<u8>::consensus_decode(&mut d)?;
-        let quorum_public_key = BLSPublicKey::consensus_decode(&mut d)?;
-        let quorum_vvec_hash = QuorumVVecHash::consensus_decode(&mut d)?;
-        let quorum_sig = BLSSignature::consensus_decode(&mut d)?;
-        let sig = BLSSignature::consensus_decode(d)?;
-        Ok(QuorumFinalizationCommitment {
-            version,
-            llmq_type,
-            quorum_hash,
-            signers,
-            valid_members,
-            quorum_public_key,
-            quorum_vvec_hash,
-            quorum_sig,
-            sig
-        })
-    }
-}
-
-/// A Quorum Commitment Payload used in a Quorum Commitment Special Transaction.
-/// This is used in the mining phase as described in DIP 6:
-/// https://github.com/dashpay/dips/blob/master/dip-0006.md#7-mining-phase.
-///
-/// Miners take the best final commitment for a DKG session and mine it into a block.
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct QuorumCommitmentPayload {
-    version: u16,
-    height: u32,
-    finalization_commitment: QuorumFinalizationCommitment,
-}
-
-impl Encodable for QuorumCommitmentPayload {
-    fn consensus_encode<S: Write>(&self, mut s: S) -> Result<usize, Error> {
-        let mut len = 0;
-        len += self.version.consensus_encode(&mut s)?;
-        len += self.height.consensus_encode(&mut s)?;
-        len += self.finalization_commitment.consensus_encode(&mut s)?;
-        Ok(len)
-    }
-}
-
-impl Decodable for QuorumCommitmentPayload {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let version = u16::consensus_decode(&mut d)?;
-        let height = u32::consensus_decode(&mut d)?;
-        let finalization_commitment = QuorumFinalizationCommitment::consensus_decode(d)?;
-        Ok(QuorumCommitmentPayload {
-            version,
-            height,
-            finalization_commitment
-        })
-    }
-}
-
-
-#[cfg(test)]
-mod tests {
-
-}
\ No newline at end of file
diff --git a/src/blockdata/witness.rs b/src/blockdata/witness.rs
deleted file mode 100644
index 3c700007d..000000000
--- a/src/blockdata/witness.rs
+++ /dev/null
@@ -1,394 +0,0 @@
-//! Witness
-//!
-//! This module contains the [`Witness`] struct and related methods to operate on it
-//!
-
-use consensus::encode::{Error, MAX_VEC_SIZE};
-use consensus::{Decodable, Encodable, WriteExt};
-use io::{self, Read, Write};
-use prelude::*;
-use VarInt;
-
-#[cfg(feature = "serde")]
-use serde;
-
-/// The Witness is the data used to unlock bitcoins since the [segwit upgrade](https://github.com/bitcoin/bips/blob/master/bip-0143.mediawiki)
-///
-/// Can be logically seen as an array of byte-arrays `Vec<Vec<u8>>` and indeed you can convert from
-/// it [`Witness::from_vec`] and convert into it [`Witness::to_vec`].
-///
-/// For serialization and deserialization performance it is stored internally as a single `Vec`,
-/// saving some allocations.
-///
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
-pub struct Witness {
-    /// contains the witness Vec<Vec<u8>> serialization without the initial varint indicating the
-    /// number of elements (which is stored in `witness_elements`)
-    content: Vec<u8>,
-
-    /// Number of elements in the witness.
-    /// It is stored separately (instead of as VarInt in the initial part of content) so that method
-    /// like [`Witness::push`] doesn't have case requiring to shift the entire array
-    witness_elements: usize,
-
-    /// If `witness_elements > 0` it's a valid index pointing to the last witness element in `content`
-    /// (Including the varint specifying the length of the element)
-    last: usize,
-
-    /// If `witness_elements > 1` it's a valid index pointing to the second-to-last witness element in `content`
-    /// (Including the varint specifying the length of the element)
-    second_to_last: usize,
-}
-
-/// Support structure to allow efficient and convenient iteration over the Witness elements
-pub struct Iter<'a>(::core::slice::Iter<'a, u8>);
-
-impl Decodable for Witness {
-    fn consensus_decode<D: Read>(mut d: D) -> Result<Self, Error> {
-        let witness_elements = VarInt::consensus_decode(&mut d)?.0 as usize;
-        if witness_elements == 0 {
-            Ok(Witness::default())
-        } else {
-            let mut cursor = 0usize;
-            let mut last = 0usize;
-            let mut second_to_last = 0usize;
-
-            // this number should be determined as high enough to cover most witness, and low enough
-            // to avoid wasting space without reallocating
-            let mut content = vec![0u8; 128];
-
-            for _ in 0..witness_elements {
-                second_to_last = last;
-                last = cursor;
-                let element_size_varint = VarInt::consensus_decode(&mut d)?;
-                let element_size_varint_len = element_size_varint.len();
-                let element_size = element_size_varint.0 as usize;
-                let required_len = cursor
-                    .checked_add(element_size)
-                    .ok_or_else(|| self::Error::OversizedVectorAllocation {
-                        requested: usize::max_value(),
-                        max: MAX_VEC_SIZE,
-                    })?
-                    .checked_add(element_size_varint_len)
-                    .ok_or_else(|| self::Error::OversizedVectorAllocation {
-                        requested: usize::max_value(),
-                        max: MAX_VEC_SIZE,
-                    })?;
-
-                if required_len > MAX_VEC_SIZE {
-                    return Err(self::Error::OversizedVectorAllocation {
-                        requested: required_len,
-                        max: MAX_VEC_SIZE,
-                    });
-                }
-
-                resize_if_needed(&mut content, required_len);
-                element_size_varint
-                    .consensus_encode(&mut content[cursor..cursor + element_size_varint_len])?;
-                cursor += element_size_varint_len;
-                d.read_exact(&mut content[cursor..cursor + element_size])?;
-                cursor += element_size;
-            }
-            content.truncate(cursor);
-            Ok(Witness {
-                content,
-                witness_elements,
-                last,
-                second_to_last,
-            })
-        }
-    }
-}
-
-fn resize_if_needed(vec: &mut Vec<u8>, required_len: usize) {
-    if required_len >= vec.len() {
-        let mut new_len = vec.len().max(1);
-        while new_len <= required_len {
-            new_len *= 2;
-        }
-        vec.resize(new_len, 0);
-    }
-}
-
-impl Encodable for Witness {
-    fn consensus_encode<W: Write>(&self, mut writer: W) -> Result<usize, io::Error> {
-        let len = VarInt(self.witness_elements as u64);
-        len.consensus_encode(&mut writer)?;
-        writer.emit_slice(&self.content[..])?;
-        Ok(self.content.len() + len.len())
-    }
-}
-
-impl Witness {
-
-    /// Create a new empty [`Witness`]
-    pub fn new() -> Self {
-        Witness::default()
-    }
-
-    /// Creates [`Witness`] object from an array of byte-arrays
-    pub fn from_vec(vec: Vec<Vec<u8>>) -> Self {
-        let witness_elements = vec.len();
-
-        let content_size: usize = vec
-            .iter()
-            .map(|el| el.len() + VarInt(el.len() as u64).len())
-            .sum();
-        let mut content = vec![0u8; content_size];
-        let mut cursor = 0usize;
-        let mut last = 0;
-        let mut second_to_last = 0;
-        for el in vec {
-            second_to_last = last;
-            last = cursor;
-            let el_len_varint = VarInt(el.len() as u64);
-            el_len_varint
-                .consensus_encode(&mut content[cursor..cursor + el_len_varint.len()])
-                .expect("writers on vec don't errors, space granted by content_size");
-            cursor += el_len_varint.len();
-            content[cursor..cursor + el.len()].copy_from_slice(&el);
-            cursor += el.len();
-        }
-
-        Witness {
-            witness_elements,
-            content,
-            last,
-            second_to_last,
-        }
-    }
-
-    /// Convenience method to create an array of byte-arrays from this witness
-    pub fn to_vec(&self) -> Vec<Vec<u8>> {
-        self.iter().map(|s| s.to_vec()).collect()
-    }
-
-    /// Returns `true` if the witness contains no element
-    pub fn is_empty(&self) -> bool {
-        self.witness_elements == 0
-    }
-
-    /// Returns a struct implementing [`Iterator`]
-    pub fn iter(&self) -> Iter {
-        Iter(self.content.iter())
-    }
-
-    /// Returns the number of elements this witness holds
-    pub fn len(&self) -> usize {
-        self.witness_elements as usize
-    }
-
-    /// Returns the bytes required when this Witness is consensus encoded
-    pub fn serialized_len(&self) -> usize {
-        self.iter()
-            .map(|el| VarInt(el.len() as u64).len() + el.len())
-            .sum::<usize>()
-            + VarInt(self.witness_elements as u64).len()
-    }
-
-    /// Clear the witness
-    pub fn clear(&mut self) {
-        self.content.clear();
-        self.witness_elements = 0;
-        self.last = 0;
-        self.second_to_last = 0;
-    }
-
-    /// Push a new element on the witness, requires an allocation
-    pub fn push<T: AsRef<[u8]>>(&mut self, new_element: T) {
-        let new_element = new_element.as_ref();
-        self.witness_elements += 1;
-        self.second_to_last = self.last;
-        self.last = self.content.len();
-        let element_len_varint = VarInt(new_element.len() as u64);
-        let current_content_len = self.content.len();
-        self.content
-            .resize(current_content_len + element_len_varint.len() + new_element.len(), 0);
-        let end_varint = current_content_len + element_len_varint.len();
-        element_len_varint
-            .consensus_encode(&mut self.content[current_content_len..end_varint])
-            .expect("writers on vec don't error, space granted through previous resize");
-        self.content[end_varint..].copy_from_slice(new_element);
-    }
-
-    fn element_at(&self, index: usize) -> Option<&[u8]> {
-        let varint = VarInt::consensus_decode(&self.content[index..]).ok()?;
-        let start = index + varint.len();
-        Some(&self.content[start..start + varint.0 as usize])
-    }
-
-    /// Return the last element in the witness, if any
-    pub fn last(&self) -> Option<&[u8]> {
-        if self.witness_elements == 0 {
-            None
-        } else {
-            self.element_at(self.last)
-        }
-    }
-
-    /// Return the second-to-last element in the witness, if any
-    pub fn second_to_last(&self) -> Option<&[u8]> {
-        if self.witness_elements <= 1 {
-            None
-        } else {
-            self.element_at(self.second_to_last)
-        }
-    }
-}
-
-impl Default for Witness {
-    fn default() -> Self {
-        // from https://doc.rust-lang.org/std/vec/struct.Vec.html#method.new
-        // The vector will not allocate until elements are pushed onto it.
-        Witness {
-            content: Vec::new(),
-            witness_elements: 0,
-            last: 0,
-            second_to_last: 0,
-        }
-    }
-}
-
-impl<'a> Iterator for Iter<'a> {
-    type Item = &'a [u8];
-
-    fn next(&mut self) -> Option<Self::Item> {
-        let varint = VarInt::consensus_decode(self.0.as_slice()).ok()?;
-        self.0.nth(varint.len() - 1)?; // VarInt::len returns at least 1
-        let len = varint.0 as usize;
-        let slice = &self.0.as_slice()[..len];
-        if len > 0 {
-            // we don't need to advance if the element is empty
-            self.0.nth(len - 1)?;
-        }
-        Some(slice)
-    }
-}
-
-// Serde keep backward compatibility with old Vec<Vec<u8>> format
-#[cfg(feature = "serde")]
-impl serde::Serialize for Witness {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: serde::Serializer,
-    {
-        let vec: Vec<_> = self.to_vec();
-        serde::Serialize::serialize(&vec, serializer)
-    }
-}
-#[cfg(feature = "serde")]
-impl<'de> serde::Deserialize<'de> for Witness {
-    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
-    where
-        D: serde::Deserializer<'de>,
-    {
-        let vec: Vec<Vec<u8>> = serde::Deserialize::deserialize(deserializer)?;
-        Ok(Witness::from_vec(vec))
-    }
-}
-
-#[cfg(test)]
-mod test {
-    use blockdata::witness::Witness;
-    use consensus::{deserialize, serialize};
-    use hashes::hex::{FromHex, ToHex};
-    use Transaction;
-
-    #[test]
-    fn test_push() {
-        let mut witness = Witness::default();
-        assert_eq!(witness.last(), None);
-        assert_eq!(witness.second_to_last(), None);
-        witness.push(&vec![0u8]);
-        let expected = Witness {
-            witness_elements: 1,
-            content: vec![1u8, 0],
-            last: 0,
-            second_to_last: 0,
-        };
-        assert_eq!(witness, expected);
-        assert_eq!(witness.last(), Some(&[0u8][..]));
-        assert_eq!(witness.second_to_last(), None);
-        witness.push(&vec![2u8, 3u8]);
-        let expected = Witness {
-            witness_elements: 2,
-            content: vec![1u8, 0, 2, 2, 3],
-            last: 2,
-            second_to_last: 0,
-        };
-        assert_eq!(witness, expected);
-        assert_eq!(witness.last(), Some(&[2u8, 3u8][..]));
-        assert_eq!(witness.second_to_last(), Some(&[0u8][..]));
-    }
-
-    #[test]
-    fn test_witness() {
-        let w0 =
-            Vec::from_hex("03d2e15674941bad4a996372cb87e1856d3652606d98562fe39c5e9e7e413f2105")
-                .unwrap();
-        let w1 = Vec::from_hex("000000").unwrap();
-        let witness_vec = vec![w0.clone(), w1.clone()];
-        let witness_serialized: Vec<u8> = serialize(&witness_vec);
-        let witness = Witness {
-            content: witness_serialized[1..].to_vec(),
-            witness_elements: 2,
-            last: 34,
-            second_to_last: 0,
-        };
-        for (i, el) in witness.iter().enumerate() {
-            assert_eq!(witness_vec[i], el);
-        }
-        assert_eq!(witness.last(), Some(&w1[..]));
-        assert_eq!(witness.second_to_last(), Some(&w0[..]));
-
-        let w_into = Witness::from_vec(witness_vec);
-        assert_eq!(w_into, witness);
-
-        assert_eq!(witness_serialized, serialize(&witness));
-    }
-
-    #[test]
-    fn test_tx() {
-        let s = "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";
-        let tx_bytes = Vec::from_hex(s).unwrap();
-        let tx: Transaction = deserialize(&tx_bytes).unwrap();
-
-        let expected_wit = ["304502210084622878c94f4c356ce49c8e33a063ec90f6ee9c0208540888cfab056cd1fca9022014e8dbfdfa46d318c6887afd92dcfa54510e057565e091d64d2ee3a66488f82c01", "026e181ffb98ebfe5a64c983073398ea4bcd1548e7b971b4c175346a25a1c12e95"];
-        for (i, wit_el) in tx.input[0].witness.iter().enumerate() {
-            assert_eq!(expected_wit[i], wit_el.to_hex());
-        }
-        assert_eq!(expected_wit[1], tx.input[0].witness.last().unwrap().to_hex());
-        assert_eq!(expected_wit[0], tx.input[0].witness.second_to_last().unwrap().to_hex());
-
-        let tx_bytes_back = serialize(&tx);
-        assert_eq!(tx_bytes_back, tx_bytes);
-    }
-
-    #[test]
-    fn fuzz_cases() {
-        let s = "26ff0000000000c94ce592cf7a4cbb68eb00ce374300000057cd0000000000000026";
-        let bytes = Vec::from_hex(s).unwrap();
-        assert!(deserialize::<Witness>(&bytes).is_err()); // OversizedVectorAllocation
-
-        let s = "24000000ffffffffffffffffffffffff";
-        let bytes = Vec::from_hex(s).unwrap();
-        assert!(deserialize::<Witness>(&bytes).is_err()); // OversizedVectorAllocation
-    }
-
-    #[cfg(feature = "serde")]
-    #[test]
-    fn test_serde() {
-        use serde_json;
-
-        let old_witness_format = vec![vec![0u8], vec![2]];
-        let new_witness_format = Witness::from_vec(old_witness_format.clone());
-
-        let old = serde_json::to_string(&old_witness_format).unwrap();
-        let new = serde_json::to_string(&new_witness_format).unwrap();
-
-        assert_eq!(old, new);
-
-        let back = serde_json::from_str(&new).unwrap();
-        assert_eq!(new_witness_format, back);
-    }
-}
diff --git a/src/consensus/encode.rs b/src/consensus/encode.rs
deleted file mode 100644
index 8597ff755..000000000
--- a/src/consensus/encode.rs
+++ /dev/null
@@ -1,1114 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Bitcoin consensus-encodable types.
-//!
-//! This is basically a replacement of the `Encodable` trait which does
-//! normalization of endianness etc., to ensure that the encoding matches
-//! the network consensus encoding.
-//!
-//! Essentially, anything that must go on the _disk_ or _network_ must be
-//! encoded using the `Encodable` trait, since this data must be the same for
-//! all systems. Any data going to the _user_ e.g., over JSONRPC, should use the
-//! ordinary `Encodable` trait. (This should also be the same across systems, of
-//! course, but has some critical differences from the network format e.g.,
-//! scripts come with an opcode decode, hashes are big-endian, numbers are
-//! typically big-endian decimals, etc.)
-//!
-
-use prelude::*;
-
-use core::{fmt, mem, u32, convert::From};
-#[cfg(feature = "std")] use std::error;
-
-use hashes::{sha256d, Hash, sha256, hash160};
-use hash_types::{BlockHash, FilterHash, TxMerkleNode, FilterHeader};
-
-use io::{self, Cursor, Read};
-
-use util::endian;
-use util::psbt;
-use util::taproot::TapLeafHash;
-use hashes::hex::ToHex;
-
-use blockdata::transaction::{txout::TxOut, Transaction, txin::TxIn, outpoint::OutPoint};
-use blockdata::transaction::special_transaction::TransactionType;
-#[cfg(feature = "std")]
-use network::{message_blockdata::Inventory, address::{Address, AddrV2Message}};
-use Script;
-
-/// Encoding error
-#[derive(Debug)]
-pub enum Error {
-    /// And I/O error
-    Io(io::Error),
-    /// PSBT-related error
-    Psbt(psbt::Error),
-    /// Network magic was not expected
-    UnexpectedNetworkMagic {
-        /// The expected network magic
-        expected: u32,
-        /// The unexpected network magic
-        actual: u32,
-    },
-    /// Tried to allocate an oversized vector
-    OversizedVectorAllocation {
-        /// The capacity requested
-        requested: usize,
-        /// The maximum capacity
-        max: usize,
-    },
-    /// Checksum was invalid
-    InvalidChecksum {
-        /// The expected checksum
-        expected: [u8; 4],
-        /// The invalid checksum
-        actual: [u8; 4],
-    },
-    /// VarInt was encoded in a non-minimal way
-    NonMinimalVarInt,
-    /// Network magic was unknown
-    UnknownNetworkMagic(u32),
-    /// Parsing error
-    ParseFailed(&'static str),
-    /// Unsupported Segwit flag
-    UnsupportedSegwitFlag(u8),
-    /// The Transaction type was not identified
-    UnknownSpecialTransactionType(u16),
-    /// We tried to convert the payload to the wrong type
-    WrongSpecialTransactionPayloadConversion {
-        /// The expected transaction type
-        expected: TransactionType,
-        /// The invalid transaction type
-        actual: TransactionType,
-    },
-    /// The script type was non standard
-    NonStandardScriptPayout(Script),
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            Error::Io(ref e) => write!(f, "I/O error: {}", e),
-            Error::Psbt(ref e) => write!(f, "PSBT error: {}", e),
-            Error::UnexpectedNetworkMagic { expected: ref e, actual: ref a } => write!(f,
-                "unexpected network magic: expected {}, actual {}", e, a),
-            Error::OversizedVectorAllocation { requested: ref r, max: ref m } => write!(f,
-                "allocation of oversized vector: requested {}, maximum {}", r, m),
-            Error::InvalidChecksum { expected: ref e, actual: ref a } => write!(f,
-                "invalid checksum: expected {}, actual {}", e.to_hex(), a.to_hex()),
-            Error::NonMinimalVarInt => write!(f, "non-minimal varint"),
-            Error::UnknownNetworkMagic(ref m) => write!(f, "unknown network magic: {}", m),
-            Error::ParseFailed(ref e) => write!(f, "parse failed: {}", e),
-            Error::UnsupportedSegwitFlag(ref swflag) => write!(f,
-                "unsupported segwit version: {}", swflag),
-            Error::UnknownSpecialTransactionType(ref stt) => write!(f,
-                                                               "unknown special transaction type: {}", stt),
-            Error::WrongSpecialTransactionPayloadConversion { expected: ref e, actual: ref a } => write!(f,
-                                                                                           "wrong special transaction payload conversion expected: {} got: {}", e, a),
-            Error::NonStandardScriptPayout(ref script) => write!(f,
-                                                        "non standard script payout: {}", script.to_hex()),
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl ::std::error::Error for Error {
-    fn cause(&self) -> Option<&dyn  error::Error> {
-        match *self {
-            Error::Io(ref e) => Some(e),
-            Error::Psbt(ref e) => Some(e),
-            Error::UnexpectedNetworkMagic { .. }
-            | Error::OversizedVectorAllocation { .. }
-            | Error::InvalidChecksum { .. }
-            | Error::NonMinimalVarInt
-            | Error::UnknownNetworkMagic(..)
-            | Error::ParseFailed(..)
-            | Error::UnsupportedSegwitFlag(..)
-            | Error::UnknownSpecialTransactionType(..)
-            | Error::WrongSpecialTransactionPayloadConversion{..}
-            | Error::NonStandardScriptPayout(..)=> None,
-        }
-    }
-}
-
-#[doc(hidden)]
-impl From<io::Error> for Error {
-    fn from(error: io::Error) -> Self {
-        Error::Io(error)
-    }
-}
-
-#[doc(hidden)]
-impl From<psbt::Error> for Error {
-    fn from(e: psbt::Error) -> Error {
-        Error::Psbt(e)
-    }
-}
-
-/// Encode an object into a vector
-pub fn serialize<T: Encodable + ?Sized>(data: &T) -> Vec<u8> {
-    let mut encoder = Vec::new();
-    let len = data.consensus_encode(&mut encoder).expect("in-memory writers don't error");
-    debug_assert_eq!(len, encoder.len());
-    encoder
-}
-
-/// Encode an object into a hex-encoded string
-pub fn serialize_hex<T: Encodable + ?Sized>(data: &T) -> String {
-    serialize(data)[..].to_hex()
-}
-
-/// Deserialize an object from a vector, will error if said deserialization
-/// doesn't consume the entire vector.
-pub fn deserialize<T: Decodable>(data: &[u8]) -> Result<T, Error> {
-    let (rv, consumed) = deserialize_partial(data)?;
-
-    // Fail if data are not consumed entirely.
-    if consumed == data.len() {
-        Ok(rv)
-    } else {
-        Err(Error::ParseFailed("data not consumed entirely when explicitly deserializing"))
-    }
-}
-
-/// Deserialize an object from a vector, but will not report an error if said deserialization
-/// doesn't consume the entire vector.
-pub fn deserialize_partial<T: Decodable>(data: &[u8]) -> Result<(T, usize), Error> {
-    let mut decoder = Cursor::new(data);
-    let rv = Decodable::consensus_decode(&mut decoder)?;
-    let consumed = decoder.position() as usize;
-
-    Ok((rv, consumed))
-}
-
-
-/// Extensions of `Write` to encode data as per Bitcoin consensus
-pub trait WriteExt {
-    /// Output a 128-bit uint
-    fn emit_u128(&mut self, v: u128) -> Result<(), io::Error>;
-    /// Output a 64-bit uint
-    fn emit_u64(&mut self, v: u64) -> Result<(), io::Error>;
-    /// Output a 32-bit uint
-    fn emit_u32(&mut self, v: u32) -> Result<(), io::Error>;
-    /// Output a 16-bit uint
-    fn emit_u16(&mut self, v: u16) -> Result<(), io::Error>;
-    /// Output a 8-bit uint
-    fn emit_u8(&mut self, v: u8) -> Result<(), io::Error>;
-
-    /// Output a 64-bit int
-    fn emit_i64(&mut self, v: i64) -> Result<(), io::Error>;
-    /// Output a 32-bit int
-    fn emit_i32(&mut self, v: i32) -> Result<(), io::Error>;
-    /// Output a 16-bit int
-    fn emit_i16(&mut self, v: i16) -> Result<(), io::Error>;
-    /// Output a 8-bit int
-    fn emit_i8(&mut self, v: i8) -> Result<(), io::Error>;
-
-    /// Output a boolean
-    fn emit_bool(&mut self, v: bool) -> Result<(), io::Error>;
-
-    /// Output a byte slice
-    fn emit_slice(&mut self, v: &[u8]) -> Result<(), io::Error>;
-}
-
-/// Extensions of `Read` to decode data as per Bitcoin consensus
-pub trait ReadExt {
-    /// Read a 128-bit uint
-    fn read_u128(&mut self) -> Result<u128, Error>;
-    /// Read a 64-bit uint
-    fn read_u64(&mut self) -> Result<u64, Error>;
-    /// Read a 32-bit uint
-    fn read_u32(&mut self) -> Result<u32, Error>;
-    /// Read a 16-bit uint
-    fn read_u16(&mut self) -> Result<u16, Error>;
-    /// Read a 8-bit uint
-    fn read_u8(&mut self) -> Result<u8, Error>;
-
-    /// Read a 64-bit int
-    fn read_i64(&mut self) -> Result<i64, Error>;
-    /// Read a 32-bit int
-    fn read_i32(&mut self) -> Result<i32, Error>;
-    /// Read a 16-bit int
-    fn read_i16(&mut self) -> Result<i16, Error>;
-    /// Read a 8-bit int
-    fn read_i8(&mut self) -> Result<i8, Error>;
-
-    /// Read a boolean
-    fn read_bool(&mut self) -> Result<bool, Error>;
-
-    /// Read a byte slice
-    fn read_slice(&mut self, slice: &mut [u8]) -> Result<(), Error>;
-}
-
-macro_rules! encoder_fn {
-    ($name:ident, $val_type:ty, $writefn:ident) => {
-        #[inline]
-        fn $name(&mut self, v: $val_type) -> Result<(), io::Error> {
-            self.write_all(&endian::$writefn(v))
-        }
-    }
-}
-
-macro_rules! decoder_fn {
-    ($name:ident, $val_type:ty, $readfn:ident, $byte_len: expr) => {
-        #[inline]
-        fn $name(&mut self) -> Result<$val_type, Error> {
-            debug_assert_eq!(::core::mem::size_of::<$val_type>(), $byte_len); // size_of isn't a constfn in 1.22
-            let mut val = [0; $byte_len];
-            self.read_exact(&mut val[..]).map_err(Error::Io)?;
-            Ok(endian::$readfn(&val))
-        }
-    }
-}
-
-impl<W: io::Write> WriteExt for W {
-    encoder_fn!(emit_u128, u128, u128_to_array_le);
-    encoder_fn!(emit_u64, u64, u64_to_array_le);
-    encoder_fn!(emit_u32, u32, u32_to_array_le);
-    encoder_fn!(emit_u16, u16, u16_to_array_le);
-    encoder_fn!(emit_i64, i64, i64_to_array_le);
-    encoder_fn!(emit_i32, i32, i32_to_array_le);
-    encoder_fn!(emit_i16, i16, i16_to_array_le);
-
-    #[inline]
-    fn emit_u8(&mut self, v: u8) -> Result<(), io::Error> {
-        self.write_all(&[v])
-    }
-    #[inline]
-    fn emit_i8(&mut self, v: i8) -> Result<(), io::Error> {
-        self.write_all(&[v as u8])
-    }
-    #[inline]
-    fn emit_bool(&mut self, v: bool) -> Result<(), io::Error> {
-        self.write_all(&[v as u8])
-    }
-    #[inline]
-    fn emit_slice(&mut self, v: &[u8]) -> Result<(), io::Error> {
-        self.write_all(v)
-    }
-}
-
-impl<R: Read> ReadExt for R {
-    decoder_fn!(read_u128, u128, slice_to_u128_le, 16);
-    decoder_fn!(read_u64, u64, slice_to_u64_le, 8);
-    decoder_fn!(read_u32, u32, slice_to_u32_le, 4);
-    decoder_fn!(read_u16, u16, slice_to_u16_le, 2);
-    decoder_fn!(read_i64, i64, slice_to_i64_le, 8);
-    decoder_fn!(read_i32, i32, slice_to_i32_le, 4);
-    decoder_fn!(read_i16, i16, slice_to_i16_le, 2);
-
-    #[inline]
-    fn read_u8(&mut self) -> Result<u8, Error> {
-        let mut slice = [0u8; 1];
-        self.read_exact(&mut slice)?;
-        Ok(slice[0])
-    }
-    #[inline]
-    fn read_i8(&mut self) -> Result<i8, Error> {
-        let mut slice = [0u8; 1];
-        self.read_exact(&mut slice)?;
-        Ok(slice[0] as i8)
-    }
-    #[inline]
-    fn read_bool(&mut self) -> Result<bool, Error> {
-        ReadExt::read_i8(self).map(|bit| bit != 0)
-    }
-    #[inline]
-    fn read_slice(&mut self, slice: &mut [u8]) -> Result<(), Error> {
-        self.read_exact(slice).map_err(Error::Io)
-    }
-}
-
-/// Maximum size, in bytes, of a vector we are allowed to decode
-pub const MAX_VEC_SIZE: usize = 4_000_000;
-
-/// Data which can be encoded in a consensus-consistent way
-pub trait Encodable {
-    /// Encode an object with a well-defined format.
-    /// Returns the number of bytes written on success.
-    ///
-    /// The only errors returned are errors propagated from the writer.
-    fn consensus_encode<W: io::Write>(&self, writer: W) -> Result<usize, io::Error>;
-}
-
-/// Data which can be encoded in a consensus-consistent way
-pub trait Decodable: Sized {
-    /// Decode an object with a well-defined format
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Self, Error>;
-}
-
-/// A variable-length unsigned integer
-#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Debug)]
-pub struct VarInt(pub u64);
-
-/// Data which must be preceded by a 4-byte checksum
-#[derive(PartialEq, Eq, Clone, Debug)]
-pub struct CheckedData(pub Vec<u8>);
-
-// Primitive types
-macro_rules! impl_int_encodable {
-    ($ty:ident, $meth_dec:ident, $meth_enc:ident) => {
-        impl Decodable for $ty {
-            #[inline]
-            fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, Error> {
-                ReadExt::$meth_dec(&mut d)
-            }
-        }
-        impl Encodable for $ty {
-            #[inline]
-            fn consensus_encode<S: WriteExt>(&self, mut s: S) -> Result<usize, io::Error> {
-                s.$meth_enc(*self)?;
-                Ok(mem::size_of::<$ty>())
-            }
-        }
-    }
-}
-
-impl_int_encodable!(u8,  read_u8,  emit_u8);
-impl_int_encodable!(u16, read_u16, emit_u16);
-impl_int_encodable!(u32, read_u32, emit_u32);
-impl_int_encodable!(u64, read_u64, emit_u64);
-impl_int_encodable!(u128, read_u128, emit_u128);
-impl_int_encodable!(i8,  read_i8,  emit_i8);
-impl_int_encodable!(i16, read_i16, emit_i16);
-impl_int_encodable!(i32, read_i32, emit_i32);
-impl_int_encodable!(i64, read_i64, emit_i64);
-
-impl VarInt {
-    /// Gets the length of this VarInt when encoded.
-    /// Returns 1 for 0..=0xFC, 3 for 0xFD..=(2^16-1), 5 for 0x10000..=(2^32-1),
-    /// and 9 otherwise.
-    #[inline]
-    pub fn len(&self) -> usize {
-        match self.0 {
-            0..=0xFC             => { 1 }
-            0xFD..=0xFFFF        => { 3 }
-            0x10000..=0xFFFFFFFF => { 5 }
-            _                    => { 9 }
-        }
-    }
-}
-
-impl Encodable for VarInt {
-    #[inline]
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        match self.0 {
-            0..=0xFC => {
-                (self.0 as u8).consensus_encode(s)?;
-                Ok(1)
-            },
-            0xFD..=0xFFFF => {
-                s.emit_u8(0xFD)?;
-                (self.0 as u16).consensus_encode(s)?;
-                Ok(3)
-            },
-            0x10000..=0xFFFFFFFF => {
-                s.emit_u8(0xFE)?;
-                (self.0 as u32).consensus_encode(s)?;
-                Ok(5)
-            },
-            _ => {
-                s.emit_u8(0xFF)?;
-                (self.0 as u64).consensus_encode(s)?;
-                Ok(9)
-            },
-        }
-    }
-}
-
-impl Decodable for VarInt {
-    #[inline]
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, Error> {
-        let n = ReadExt::read_u8(&mut d)?;
-        match n {
-            0xFF => {
-                let x = ReadExt::read_u64(&mut d)?;
-                if x < 0x100000000 {
-                    Err(self::Error::NonMinimalVarInt)
-                } else {
-                    Ok(VarInt(x))
-                }
-            }
-            0xFE => {
-                let x = ReadExt::read_u32(&mut d)?;
-                if x < 0x10000 {
-                    Err(self::Error::NonMinimalVarInt)
-                } else {
-                    Ok(VarInt(x as u64))
-                }
-            }
-            0xFD => {
-                let x = ReadExt::read_u16(&mut d)?;
-                if x < 0xFD {
-                    Err(self::Error::NonMinimalVarInt)
-                } else {
-                    Ok(VarInt(x as u64))
-                }
-            }
-            n => Ok(VarInt(n as u64))
-        }
-    }
-}
-
-// Booleans
-impl Encodable for bool {
-    #[inline]
-    fn consensus_encode<S: WriteExt>(&self, mut s: S) -> Result<usize, io::Error> {
-        s.emit_bool(*self)?;
-        Ok(1)
-    }
-}
-
-impl Decodable for bool {
-    #[inline]
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<bool, Error> {
-        ReadExt::read_bool(&mut d)
-    }
-}
-
-// Strings
-impl Encodable for String {
-    #[inline]
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let b = self.as_bytes();
-        let vi_len = VarInt(b.len() as u64).consensus_encode(&mut s)?;
-        s.emit_slice(b)?;
-        Ok(vi_len + b.len())
-    }
-}
-
-impl Decodable for String {
-    #[inline]
-    fn consensus_decode<D: io::Read>(d: D) -> Result<String, Error> {
-        String::from_utf8(Decodable::consensus_decode(d)?)
-            .map_err(|_| self::Error::ParseFailed("String was not valid UTF8"))
-    }
-}
-
-// Cow<'static, str>
-impl Encodable for Cow<'static, str> {
-    #[inline]
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let b = self.as_bytes();
-        let vi_len = VarInt(b.len() as u64).consensus_encode(&mut s)?;
-        s.emit_slice(b)?;
-        Ok(vi_len + b.len())
-    }
-}
-
-impl Decodable for Cow<'static, str> {
-    #[inline]
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Cow<'static, str>, Error> {
-        String::from_utf8(Decodable::consensus_decode(d)?)
-            .map_err(|_| self::Error::ParseFailed("String was not valid UTF8"))
-            .map(Cow::Owned)
-    }
-}
-
-
-// Arrays
-macro_rules! impl_array {
-    ( $size:expr ) => {
-        impl Encodable for [u8; $size] {
-            #[inline]
-            fn consensus_encode<S: WriteExt>(&self, mut s: S) -> Result<usize, io::Error> {
-                s.emit_slice(&self[..])?;
-                Ok(self.len())
-            }
-        }
-
-        impl Decodable for [u8; $size] {
-            #[inline]
-            fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, Error> {
-                let mut ret = [0; $size];
-                d.read_slice(&mut ret)?;
-                Ok(ret)
-            }
-        }
-    };
-}
-
-impl_array!(2);
-impl_array!(4);
-impl_array!(8);
-impl_array!(10);
-impl_array!(12);
-impl_array!(16);
-impl_array!(20);
-impl_array!(32);
-impl_array!(33);
-impl_array!(96);
-
-impl Decodable for [u16; 8] {
-    #[inline]
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, Error> {
-        let mut res = [0; 8];
-        for item in &mut res {
-            *item = Decodable::consensus_decode(&mut d)?;
-        }
-        Ok(res)
-    }
-}
-
-impl Encodable for [u16; 8] {
-    #[inline]
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        for c in self.iter() { c.consensus_encode(&mut s)?; }
-        Ok(16)
-    }
-}
-
-// Vectors
-macro_rules! impl_vec {
-    ($type: ty) => {
-        impl Encodable for Vec<$type> {
-            #[inline]
-            fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-                let mut len = 0;
-                len += VarInt(self.len() as u64).consensus_encode(&mut s)?;
-                for c in self.iter() {
-                    len += c.consensus_encode(&mut s)?;
-                }
-                Ok(len)
-            }
-        }
-        impl Decodable for Vec<$type> {
-            #[inline]
-            fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, Error> {
-                let len = VarInt::consensus_decode(&mut d)?.0;
-                let byte_size = (len as usize)
-                    .checked_mul(mem::size_of::<$type>())
-                    .ok_or(self::Error::ParseFailed("Invalid length"))?;
-                if byte_size > MAX_VEC_SIZE {
-                    return Err(self::Error::OversizedVectorAllocation { requested: byte_size, max: MAX_VEC_SIZE })
-                }
-                let mut ret = Vec::with_capacity(len as usize);
-                let mut d = d.take(MAX_VEC_SIZE as u64);
-                for _ in 0..len {
-                    ret.push(Decodable::consensus_decode(&mut d)?);
-                }
-                Ok(ret)
-            }
-        }
-    }
-}
-impl_vec!(BlockHash);
-impl_vec!(FilterHash);
-impl_vec!(FilterHeader);
-impl_vec!(TxMerkleNode);
-impl_vec!(Transaction);
-impl_vec!(TxOut);
-impl_vec!(TxIn);
-impl_vec!(Vec<u8>);
-impl_vec!(u64);
-impl_vec!(TapLeafHash);
-impl_vec!(OutPoint);
-
-#[cfg(feature = "std")] impl_vec!(Inventory);
-#[cfg(feature = "std")] impl_vec!((u32, Address));
-#[cfg(feature = "std")] impl_vec!(AddrV2Message);
-
-pub(crate) fn consensus_encode_with_size<S: io::Write>(data: &[u8], mut s: S) -> Result<usize, io::Error> {
-    let vi_len = VarInt(data.len() as u64).consensus_encode(&mut s)?;
-    s.emit_slice(data)?;
-    Ok(vi_len + data.len())
-}
-
-
-impl Encodable for Vec<u8> {
-    #[inline]
-    fn consensus_encode<S: io::Write>(&self, s: S) -> Result<usize, io::Error> {
-        consensus_encode_with_size(self, s)
-    }
-}
-
-impl Decodable for Vec<u8> {
-    #[inline]
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, Error> {
-        let len = VarInt::consensus_decode(&mut d)?.0 as usize;
-        if len > MAX_VEC_SIZE {
-            return Err(self::Error::OversizedVectorAllocation { requested: len, max: MAX_VEC_SIZE })
-        }
-        let mut ret = vec![0u8; len];
-        d.read_slice(&mut ret)?;
-        Ok(ret)
-    }
-}
-
-impl Encodable for Box<[u8]> {
-    #[inline]
-    fn consensus_encode<S: io::Write>(&self, s: S) -> Result<usize, io::Error> {
-        consensus_encode_with_size(self, s)
-    }
-}
-
-impl Decodable for Box<[u8]> {
-    #[inline]
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Self, Error> {
-        <Vec<u8>>::consensus_decode(d).map(From::from)
-    }
-}
-
-
-/// Do a double-SHA256 on some data and return the first 4 bytes
-fn sha2_checksum(data: &[u8]) -> [u8; 4] {
-    let checksum = <sha256d::Hash as Hash>::hash(data);
-    [checksum[0], checksum[1], checksum[2], checksum[3]]
-}
-
-// Checked data
-impl Encodable for CheckedData {
-    #[inline]
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        (self.0.len() as u32).consensus_encode(&mut s)?;
-        sha2_checksum(&self.0).consensus_encode(&mut s)?;
-        s.emit_slice(&self.0)?;
-        Ok(8 + self.0.len())
-    }
-}
-
-impl Decodable for CheckedData {
-    #[inline]
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, Error> {
-        let len = u32::consensus_decode(&mut d)?;
-        if len > MAX_VEC_SIZE as u32 {
-            return Err(self::Error::OversizedVectorAllocation {
-                requested: len as usize,
-                max: MAX_VEC_SIZE
-            });
-        }
-        let checksum = <[u8; 4]>::consensus_decode(&mut d)?;
-        let mut ret = vec![0u8; len as usize];
-        d.read_slice(&mut ret)?;
-        let expected_checksum = sha2_checksum(&ret);
-        if expected_checksum != checksum {
-            Err(self::Error::InvalidChecksum {
-                expected: expected_checksum,
-                actual: checksum,
-            })
-        } else {
-            Ok(CheckedData(ret))
-        }
-    }
-}
-
-// References
-impl<'a, T: Encodable> Encodable for &'a T {
-    fn consensus_encode<S: io::Write>(&self, s: S) -> Result<usize, io::Error> {
-        (&**self).consensus_encode(s)
-    }
-}
-
-impl<'a, T: Encodable> Encodable for &'a mut T {
-    fn consensus_encode<S: io::Write>(&self, s: S) -> Result<usize, io::Error> {
-        (&**self).consensus_encode(s)
-    }
-}
-
-impl<T: Encodable> Encodable for rc::Rc<T> {
-    fn consensus_encode<S: io::Write>(&self, s: S) -> Result<usize, io::Error> {
-        (&**self).consensus_encode(s)
-    }
-}
-
-impl<T: Encodable> Encodable for sync::Arc<T> {
-    fn consensus_encode<S: io::Write>(&self, s: S) -> Result<usize, io::Error> {
-        (&**self).consensus_encode(s)
-    }
-}
-
-// Tuples
-macro_rules! tuple_encode {
-    ($($x:ident),*) => {
-        impl <$($x: Encodable),*> Encodable for ($($x),*) {
-            #[inline]
-            #[allow(non_snake_case)]
-            fn consensus_encode<S: io::Write>(
-                &self,
-                mut s: S,
-            ) -> Result<usize, io::Error> {
-                let &($(ref $x),*) = self;
-                let mut len = 0;
-                $(len += $x.consensus_encode(&mut s)?;)*
-                Ok(len)
-            }
-        }
-
-        impl<$($x: Decodable),*> Decodable for ($($x),*) {
-            #[inline]
-            #[allow(non_snake_case)]
-            fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, Error> {
-                Ok(($({let $x = Decodable::consensus_decode(&mut d)?; $x }),*))
-            }
-        }
-    };
-}
-
-tuple_encode!(T0, T1);
-tuple_encode!(T0, T1, T2);
-tuple_encode!(T0, T1, T2, T3);
-tuple_encode!(T0, T1, T2, T3, T4);
-tuple_encode!(T0, T1, T2, T3, T4, T5);
-tuple_encode!(T0, T1, T2, T3, T4, T5, T6);
-tuple_encode!(T0, T1, T2, T3, T4, T5, T6, T7);
-
-impl Encodable for hash160::Hash {
-    fn consensus_encode<S: io::Write>(&self, s: S) -> Result<usize, io::Error> {
-        self.into_inner().consensus_encode(s)
-    }
-}
-
-impl Decodable for hash160::Hash {
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Self, Error> {
-        Ok(Self::from_inner(<<Self as Hash>::Inner>::consensus_decode(d)?))
-    }
-}
-
-impl Encodable for sha256d::Hash {
-    fn consensus_encode<S: io::Write>(&self, s: S) -> Result<usize, io::Error> {
-        self.into_inner().consensus_encode(s)
-    }
-}
-
-impl Decodable for sha256d::Hash {
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Self, Error> {
-        Ok(Self::from_inner(<<Self as Hash>::Inner>::consensus_decode(d)?))
-    }
-}
-
-impl Encodable for sha256::Hash {
-    fn consensus_encode<S: io::Write>(&self, s: S) -> Result<usize, io::Error> {
-        self.into_inner().consensus_encode(s)
-    }
-}
-
-impl Decodable for sha256::Hash {
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Self, Error> {
-        Ok(Self::from_inner(<<Self as Hash>::Inner>::consensus_decode(d)?))
-    }
-}
-
-impl Encodable for TapLeafHash {
-    fn consensus_encode<S: io::Write>(&self, s: S) -> Result<usize, io::Error> {
-        self.into_inner().consensus_encode(s)
-    }
-}
-
-impl Decodable for TapLeafHash {
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Self, Error> {
-        Ok(Self::from_inner(<<Self as Hash>::Inner>::consensus_decode(d)?))
-    }
-}
-
-// Tests
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use core::{mem::{self, discriminant}, fmt};
-    use super::{deserialize, serialize, Error, CheckedData, VarInt};
-    use super::{Transaction, BlockHash, FilterHash, TxMerkleNode, TxOut, TxIn};
-    use consensus::{Encodable, deserialize_partial, Decodable};
-    use util::endian::{u64_to_array_le, u32_to_array_le, u16_to_array_le};
-    use secp256k1::rand::{thread_rng, Rng};
-    #[cfg(feature = "std")]
-    use network::{Address, message_blockdata::Inventory};
-
-    #[test]
-    fn serialize_int_test() {
-        // bool
-        assert_eq!(serialize(&false), vec![0u8]);
-        assert_eq!(serialize(&true), vec![1u8]);
-        // u8
-        assert_eq!(serialize(&1u8), vec![1u8]);
-        assert_eq!(serialize(&0u8), vec![0u8]);
-        assert_eq!(serialize(&255u8), vec![255u8]);
-        // u16
-        assert_eq!(serialize(&1u16), vec![1u8, 0]);
-        assert_eq!(serialize(&256u16), vec![0u8, 1]);
-        assert_eq!(serialize(&5000u16), vec![136u8, 19]);
-        // u32
-        assert_eq!(serialize(&1u32), vec![1u8, 0, 0, 0]);
-        assert_eq!(serialize(&256u32), vec![0u8, 1, 0, 0]);
-        assert_eq!(serialize(&5000u32), vec![136u8, 19, 0, 0]);
-        assert_eq!(serialize(&500000u32), vec![32u8, 161, 7, 0]);
-        assert_eq!(serialize(&168430090u32), vec![10u8, 10, 10, 10]);
-        // i32
-        assert_eq!(serialize(&-1i32), vec![255u8, 255, 255, 255]);
-        assert_eq!(serialize(&-256i32), vec![0u8, 255, 255, 255]);
-        assert_eq!(serialize(&-5000i32), vec![120u8, 236, 255, 255]);
-        assert_eq!(serialize(&-500000i32), vec![224u8, 94, 248, 255]);
-        assert_eq!(serialize(&-168430090i32), vec![246u8, 245, 245, 245]);
-        assert_eq!(serialize(&1i32), vec![1u8, 0, 0, 0]);
-        assert_eq!(serialize(&256i32), vec![0u8, 1, 0, 0]);
-        assert_eq!(serialize(&5000i32), vec![136u8, 19, 0, 0]);
-        assert_eq!(serialize(&500000i32), vec![32u8, 161, 7, 0]);
-        assert_eq!(serialize(&168430090i32), vec![10u8, 10, 10, 10]);
-        // u64
-        assert_eq!(serialize(&1u64), vec![1u8, 0, 0, 0, 0, 0, 0, 0]);
-        assert_eq!(serialize(&256u64), vec![0u8, 1, 0, 0, 0, 0, 0, 0]);
-        assert_eq!(serialize(&5000u64), vec![136u8, 19, 0, 0, 0, 0, 0, 0]);
-        assert_eq!(serialize(&500000u64), vec![32u8, 161, 7, 0, 0, 0, 0, 0]);
-        assert_eq!(serialize(&723401728380766730u64), vec![10u8, 10, 10, 10, 10, 10, 10, 10]);
-        // i64
-        assert_eq!(serialize(&-1i64), vec![255u8, 255, 255, 255, 255, 255, 255, 255]);
-        assert_eq!(serialize(&-256i64), vec![0u8, 255, 255, 255, 255, 255, 255, 255]);
-        assert_eq!(serialize(&-5000i64), vec![120u8, 236, 255, 255, 255, 255, 255, 255]);
-        assert_eq!(serialize(&-500000i64), vec![224u8, 94, 248, 255, 255, 255, 255, 255]);
-        assert_eq!(serialize(&-723401728380766730i64), vec![246u8, 245, 245, 245, 245, 245, 245, 245]);
-        assert_eq!(serialize(&1i64), vec![1u8, 0, 0, 0, 0, 0, 0, 0]);
-        assert_eq!(serialize(&256i64), vec![0u8, 1, 0, 0, 0, 0, 0, 0]);
-        assert_eq!(serialize(&5000i64), vec![136u8, 19, 0, 0, 0, 0, 0, 0]);
-        assert_eq!(serialize(&500000i64), vec![32u8, 161, 7, 0, 0, 0, 0, 0]);
-        assert_eq!(serialize(&723401728380766730i64), vec![10u8, 10, 10, 10, 10, 10, 10, 10]);
-    }
-
-    #[test]
-    fn serialize_varint_test() {
-        assert_eq!(serialize(&VarInt(10)), vec![10u8]);
-        assert_eq!(serialize(&VarInt(0xFC)), vec![0xFCu8]);
-        assert_eq!(serialize(&VarInt(0xFD)), vec![0xFDu8, 0xFD, 0]);
-        assert_eq!(serialize(&VarInt(0xFFF)), vec![0xFDu8, 0xFF, 0xF]);
-        assert_eq!(serialize(&VarInt(0xF0F0F0F)), vec![0xFEu8, 0xF, 0xF, 0xF, 0xF]);
-        assert_eq!(serialize(&VarInt(0xF0F0F0F0F0E0)), vec![0xFFu8, 0xE0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0, 0]);
-        assert_eq!(test_varint_encode(0xFF, &u64_to_array_le(0x100000000)).unwrap(), VarInt(0x100000000));
-        assert_eq!(test_varint_encode(0xFE, &u64_to_array_le(0x10000)).unwrap(), VarInt(0x10000));
-        assert_eq!(test_varint_encode(0xFD, &u64_to_array_le(0xFD)).unwrap(), VarInt(0xFD));
-
-        // Test that length calc is working correctly
-        test_varint_len(VarInt(0), 1);
-        test_varint_len(VarInt(0xFC), 1);
-        test_varint_len(VarInt(0xFD), 3);
-        test_varint_len(VarInt(0xFFFF), 3);
-        test_varint_len(VarInt(0x10000), 5);
-        test_varint_len(VarInt(0xFFFFFFFF), 5);
-        test_varint_len(VarInt(0xFFFFFFFF+1), 9);
-        test_varint_len(VarInt(u64::max_value()), 9);
-    }
-
-    fn test_varint_len(varint: VarInt, expected: usize) {
-        let mut encoder = vec![];
-        assert_eq!(varint.consensus_encode(&mut encoder).unwrap(), expected);
-        assert_eq!(varint.len(), expected);
-    }
-
-    fn test_varint_encode(n: u8, x: &[u8]) -> Result<VarInt, Error> {
-        let mut input = [0u8; 9];
-        input[0] = n;
-        input[1..x.len()+1].copy_from_slice(x);
-        deserialize_partial::<VarInt>(&input).map(|t|t.0)
-    }
-
-    #[test]
-    fn deserialize_nonminimal_vec() {
-        // Check the edges for variant int
-        assert_eq!(discriminant(&test_varint_encode(0xFF, &u64_to_array_le(0x100000000-1)).unwrap_err()),
-                   discriminant(&Error::NonMinimalVarInt));
-        assert_eq!(discriminant(&test_varint_encode(0xFE, &u32_to_array_le(0x10000-1)).unwrap_err()),
-                   discriminant(&Error::NonMinimalVarInt));
-        assert_eq!(discriminant(&test_varint_encode(0xFD, &u16_to_array_le(0xFD-1)).unwrap_err()),
-                   discriminant(&Error::NonMinimalVarInt));
-
-        assert_eq!(discriminant(&deserialize::<Vec<u8>>(&[0xfd, 0x00, 0x00]).unwrap_err()),
-                   discriminant(&Error::NonMinimalVarInt));
-        assert_eq!(discriminant(&deserialize::<Vec<u8>>(&[0xfd, 0xfc, 0x00]).unwrap_err()),
-                   discriminant(&Error::NonMinimalVarInt));
-        assert_eq!(discriminant(&deserialize::<Vec<u8>>(&[0xfd, 0xfc, 0x00]).unwrap_err()),
-                   discriminant(&Error::NonMinimalVarInt));
-        assert_eq!(discriminant(&deserialize::<Vec<u8>>(&[0xfe, 0xff, 0x00, 0x00, 0x00]).unwrap_err()),
-                   discriminant(&Error::NonMinimalVarInt));
-        assert_eq!(discriminant(&deserialize::<Vec<u8>>(&[0xfe, 0xff, 0xff, 0x00, 0x00]).unwrap_err()),
-                   discriminant(&Error::NonMinimalVarInt));
-        assert_eq!(discriminant(&deserialize::<Vec<u8>>(&[0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]).unwrap_err()),
-                   discriminant(&Error::NonMinimalVarInt));
-        assert_eq!(discriminant(&deserialize::<Vec<u8>>(&[0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00]).unwrap_err()),
-                   discriminant(&Error::NonMinimalVarInt));
-
-
-        let mut vec_256 = vec![0; 259];
-        vec_256[0] = 0xfd;
-        vec_256[1] = 0x00;
-        vec_256[2] = 0x01;
-        assert!(deserialize::<Vec<u8>>(&vec_256).is_ok());
-
-        let mut vec_253 = vec![0; 256];
-        vec_253[0] = 0xfd;
-        vec_253[1] = 0xfd;
-        vec_253[2] = 0x00;
-        assert!(deserialize::<Vec<u8>>(&vec_253).is_ok());
-    }
-
-    #[test]
-    fn serialize_checkeddata_test() {
-        let cd = CheckedData(vec![1u8, 2, 3, 4, 5]);
-        assert_eq!(serialize(&cd), vec![5, 0, 0, 0, 162, 107, 175, 90, 1, 2, 3, 4, 5]);
-    }
-
-    #[test]
-    fn serialize_vector_test() {
-        assert_eq!(serialize(&vec![1u8, 2, 3]), vec![3u8, 1, 2, 3]);
-        // TODO: test vectors of more interesting objects
-    }
-
-    #[test]
-    fn serialize_strbuf_test() {
-        assert_eq!(serialize(&"Andrew".to_string()), vec![6u8, 0x41, 0x6e, 0x64, 0x72, 0x65, 0x77]);
-    }
-
-    #[test]
-    fn deserialize_int_test() {
-        // bool
-        assert!((deserialize(&[58u8, 0]) as Result<bool, _>).is_err());
-        assert_eq!(deserialize(&[58u8]).ok(), Some(true));
-        assert_eq!(deserialize(&[1u8]).ok(), Some(true));
-        assert_eq!(deserialize(&[0u8]).ok(), Some(false));
-        assert!((deserialize(&[0u8, 1]) as Result<bool, _>).is_err());
-
-        // u8
-        assert_eq!(deserialize(&[58u8]).ok(), Some(58u8));
-
-        // u16
-        assert_eq!(deserialize(&[0x01u8, 0x02]).ok(), Some(0x0201u16));
-        assert_eq!(deserialize(&[0xABu8, 0xCD]).ok(), Some(0xCDABu16));
-        assert_eq!(deserialize(&[0xA0u8, 0x0D]).ok(), Some(0xDA0u16));
-        let failure16: Result<u16, _> = deserialize(&[1u8]);
-        assert!(failure16.is_err());
-
-        // u32
-        assert_eq!(deserialize(&[0xABu8, 0xCD, 0, 0]).ok(), Some(0xCDABu32));
-        assert_eq!(deserialize(&[0xA0u8, 0x0D, 0xAB, 0xCD]).ok(), Some(0xCDAB0DA0u32));
-        let failure32: Result<u32, _> = deserialize(&[1u8, 2, 3]);
-        assert!(failure32.is_err());
-        // TODO: test negative numbers
-        assert_eq!(deserialize(&[0xABu8, 0xCD, 0, 0]).ok(), Some(0xCDABi32));
-        assert_eq!(deserialize(&[0xA0u8, 0x0D, 0xAB, 0x2D]).ok(), Some(0x2DAB0DA0i32));
-        let failurei32: Result<i32, _> = deserialize(&[1u8, 2, 3]);
-        assert!(failurei32.is_err());
-
-        // u64
-        assert_eq!(deserialize(&[0xABu8, 0xCD, 0, 0, 0, 0, 0, 0]).ok(), Some(0xCDABu64));
-        assert_eq!(deserialize(&[0xA0u8, 0x0D, 0xAB, 0xCD, 0x99, 0, 0, 0x99]).ok(), Some(0x99000099CDAB0DA0u64));
-        let failure64: Result<u64, _> = deserialize(&[1u8, 2, 3, 4, 5, 6, 7]);
-        assert!(failure64.is_err());
-        // TODO: test negative numbers
-        assert_eq!(deserialize(&[0xABu8, 0xCD, 0, 0, 0, 0, 0, 0]).ok(), Some(0xCDABi64));
-        assert_eq!(deserialize(&[0xA0u8, 0x0D, 0xAB, 0xCD, 0x99, 0, 0, 0x99]).ok(), Some(-0x66ffff663254f260i64));
-        let failurei64: Result<i64, _> = deserialize(&[1u8, 2, 3, 4, 5, 6, 7]);
-        assert!(failurei64.is_err());
-    }
-
-    #[test]
-    fn deserialize_vec_test() {
-        assert_eq!(deserialize(&[3u8, 2, 3, 4]).ok(), Some(vec![2u8, 3, 4]));
-        assert!((deserialize(&[4u8, 2, 3, 4, 5, 6]) as Result<Vec<u8>, _>).is_err());
-        // found by cargo fuzz
-        assert!(deserialize::<Vec<u64>>(&[0xff,0xff,0xff,0xff,0x6b,0x6b,0x6b,0x6b,0x6b,0x6b,0x6b,0x6b,0x6b,0x6b,0x6b,0x6b,0xa,0xa,0x3a]).is_err());
-
-        let rand_io_err = Error::Io(io::Error::new(io::ErrorKind::Other, ""));
-
-        // Check serialization that `if len > MAX_VEC_SIZE {return err}` isn't inclusive,
-        // by making sure it fails with IO Error and not an `OversizedVectorAllocation` Error.
-        let err = deserialize::<CheckedData>(&serialize(&(super::MAX_VEC_SIZE as u32))).unwrap_err();
-        assert_eq!(discriminant(&err), discriminant(&rand_io_err));
-
-        test_len_is_max_vec::<u8>();
-        test_len_is_max_vec::<BlockHash>();
-        test_len_is_max_vec::<FilterHash>();
-        test_len_is_max_vec::<TxMerkleNode>();
-        test_len_is_max_vec::<Transaction>();
-        test_len_is_max_vec::<TxOut>();
-        test_len_is_max_vec::<TxIn>();
-        test_len_is_max_vec::<Vec<u8>>();
-        test_len_is_max_vec::<u64>();
-        #[cfg(feature = "std")]
-        test_len_is_max_vec::<(u32, Address)>();
-        #[cfg(feature = "std")]
-        test_len_is_max_vec::<Inventory>();
-    }
-
-    fn test_len_is_max_vec<T>() where Vec<T>: Decodable, T: fmt::Debug {
-        let rand_io_err = Error::Io(io::Error::new(io::ErrorKind::Other, ""));
-        let varint = VarInt((super::MAX_VEC_SIZE / mem::size_of::<T>()) as u64);
-        let err = deserialize::<Vec<T>>(&serialize(&varint)).unwrap_err();
-        assert_eq!(discriminant(&err), discriminant(&rand_io_err));
-    }
-
-    #[test]
-    fn deserialize_strbuf_test() {
-        assert_eq!(deserialize(&[6u8, 0x41, 0x6e, 0x64, 0x72, 0x65, 0x77]).ok(), Some("Andrew".to_string()));
-        assert_eq!(
-            deserialize(&[6u8, 0x41, 0x6e, 0x64, 0x72, 0x65, 0x77]).ok(),
-            Some(Cow::Borrowed("Andrew"))
-        );
-    }
-
-    #[test]
-    fn deserialize_checkeddata_test() {
-        let cd: Result<CheckedData, _> = deserialize(&[5u8, 0, 0, 0, 162, 107, 175, 90, 1, 2, 3, 4, 5]);
-        assert_eq!(cd.ok(), Some(CheckedData(vec![1u8, 2, 3, 4, 5])));
-    }
-
-    #[test]
-    fn limit_read_test() {
-        let witness = vec![vec![0u8; 3_999_999]; 2];
-        let ser = serialize(&witness);
-        let mut reader = io::Cursor::new(ser);
-        let err = Vec::<Vec<u8>>::consensus_decode(&mut reader);
-        assert!(err.is_err());
-    }
-
-    #[test]
-    fn serialization_round_trips() {
-        macro_rules! round_trip {
-            ($($val_type:ty),*) => {
-                $(
-                    let r: $val_type = thread_rng().gen();
-                    assert_eq!(deserialize::<$val_type>(&serialize(&r)).unwrap(), r);
-                )*
-            };
-        }
-        macro_rules! round_trip_bytes {
-            ($(($val_type:ty, $data:expr)),*) => {
-                $(
-                    thread_rng().fill(&mut $data[..]);
-                    assert_eq!(deserialize::<$val_type>(&serialize(&$data)).unwrap()[..], $data[..]);
-                )*
-            };
-        }
-
-        let mut data = Vec::with_capacity(256);
-        let mut data64 = Vec::with_capacity(256);
-        for _ in 0..10 {
-            round_trip!{bool, i8, u8, i16, u16, i32, u32, i64, u64,
-            (bool, i8, u16, i32), (u64, i64, u32, i32, u16, i16), (i8, u8, i16, u16, i32, u32, i64, u64),
-            [u8; 2], [u8; 4], [u8; 8], [u8; 12], [u8; 16], [u8; 32]};
-
-            data.clear();
-            data64.clear();
-            let len = thread_rng().gen_range(1..256);
-            data.resize(len, 0u8);
-            data64.resize(len, 0u64);
-            let mut arr33 = [0u8; 33];
-            let mut arr16 = [0u16; 8];
-            round_trip_bytes!{(Vec<u8>, data), ([u8; 33], arr33), ([u16; 8], arr16), (Vec<u64>, data64)};
-
-
-        }
-    }
-}
-
diff --git a/src/hash_types.rs b/src/hash_types.rs
deleted file mode 100644
index ef1074b95..000000000
--- a/src/hash_types.rs
+++ /dev/null
@@ -1,92 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Dash hash types.
-//!
-//! This module defines types for hashes used throughout the library. These
-//! types are needed in order to avoid mixing data of the same hash format
-//! (e.g. `SHA256d`) but of different meaning (such as transaction id, block
-//! hash).
-//!
-
-use hashes::{Hash, sha256, sha256d, hash160};
-
-macro_rules! impl_hashencode {
-    ($hashtype:ident) => {
-        impl $crate::consensus::Encodable for $hashtype {
-            fn consensus_encode<S: $crate::io::Write>(&self, s: S) -> Result<usize, $crate::io::Error> {
-                self.0.consensus_encode(s)
-            }
-        }
-
-        impl $crate::consensus::Decodable for $hashtype {
-            fn consensus_decode<D: $crate::io::Read>(d: D) -> Result<Self, $crate::consensus::encode::Error> {
-                use $crate::hashes::Hash;
-                Ok(Self::from_inner(<<$hashtype as $crate::hashes::Hash>::Inner>::consensus_decode(d)?))
-            }
-        }
-    }
-}
-
-hash_newtype!(Txid, sha256d::Hash, 32, doc="A dash transaction hash/transaction ID.");
-hash_newtype!(Wtxid, sha256d::Hash, 32, doc="A dash witness transaction ID.");
-hash_newtype!(BlockHash, sha256d::Hash, 32, doc="A dash block hash.");
-hash_newtype!(Sighash, sha256d::Hash, 32, doc="Hash of the transaction according to the signature algorithm");
-
-hash_newtype!(PubkeyHash, hash160::Hash, 20, doc="A hash of a public key.");
-hash_newtype!(ScriptHash, hash160::Hash, 20, doc="A hash of Dash Script bytecode.");
-hash_newtype!(WPubkeyHash, hash160::Hash, 20, doc="SegWit version of a public key hash.");
-hash_newtype!(WScriptHash, sha256::Hash, 32, doc="SegWit version of a Bitcoin Script bytecode hash.");
-
-hash_newtype!(TxMerkleNode, sha256d::Hash, 32, doc="A hash of the Merkle tree branch or root for transactions");
-hash_newtype!(WitnessMerkleNode, sha256d::Hash, 32, doc="A hash corresponding to the Merkle tree root for witness data");
-hash_newtype!(WitnessCommitment, sha256d::Hash, 32, doc="A hash corresponding to the witness structure commitment in the coinbase transaction");
-hash_newtype!(XpubIdentifier, hash160::Hash, 20, doc="XpubIdentifier as defined in BIP-32.");
-
-hash_newtype!(FilterHash, sha256d::Hash, 32, doc="Filter hash, as defined in BIP-157");
-hash_newtype!(FilterHeader, sha256d::Hash, 32, doc="Filter header, as defined in BIP-157");
-
-hash_newtype!(MerkleRootMasternodeList, sha256d::Hash, 32, doc="The merkle root of the masternode list");
-hash_newtype!(MerkleRootQuorums, sha256d::Hash, 32, doc="The merkle root of the quorums");
-
-hash_newtype!(SpecialTransactionPayloadHash, sha256d::Hash, 32, doc="A special transaction payload hash");
-hash_newtype!(InputsHash, sha256d::Hash, 32, doc="A hash of all transaction inputs");
-
-hash_newtype!(QuorumHash, sha256d::Hash, 32, doc="A hash used to identify a quorum");
-hash_newtype!(QuorumVVecHash, sha256d::Hash, 32, doc="A hash of a quorum verification vector");
-
-impl_hashencode!(Txid);
-impl_hashencode!(Wtxid);
-impl_hashencode!(BlockHash);
-impl_hashencode!(Sighash);
-
-impl_hashencode!(PubkeyHash);
-
-impl_hashencode!(TxMerkleNode);
-impl_hashencode!(WitnessMerkleNode);
-
-impl_hashencode!(FilterHash);
-impl_hashencode!(FilterHeader);
-
-impl_hashencode!(MerkleRootMasternodeList);
-impl_hashencode!(MerkleRootQuorums);
-
-impl_hashencode!(SpecialTransactionPayloadHash);
-impl_hashencode!(InputsHash);
-
-impl_hashencode!(QuorumHash);
-impl_hashencode!(QuorumVVecHash);
\ No newline at end of file
diff --git a/src/internal_macros.rs b/src/internal_macros.rs
deleted file mode 100644
index b60bbcfb0..000000000
--- a/src/internal_macros.rs
+++ /dev/null
@@ -1,611 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Internal macros.
-//!
-//! Macros meant to be used inside the Rust Dash library.
-//!
-
-macro_rules! impl_consensus_encoding {
-    ($thing:ident, $($field:ident),+) => (
-        impl $crate::consensus::Encodable for $thing {
-            #[inline]
-            fn consensus_encode<S: $crate::io::Write>(
-                &self,
-                mut s: S,
-            ) -> Result<usize, $crate::io::Error> {
-                let mut len = 0;
-                $(len += self.$field.consensus_encode(&mut s)?;)+
-                Ok(len)
-            }
-        }
-
-        impl $crate::consensus::Decodable for $thing {
-            #[inline]
-            fn consensus_decode<D: $crate::io::Read>(
-                d: D,
-            ) -> Result<$thing, $crate::consensus::encode::Error> {
-                let mut d = d.take($crate::consensus::encode::MAX_VEC_SIZE as u64);
-                Ok($thing {
-                    $($field: $crate::consensus::Decodable::consensus_decode(&mut d)?),+
-                })
-            }
-        }
-    );
-}
-
-/// Implements standard array methods for a given wrapper type
-macro_rules! impl_array_newtype {
-    ($thing:ident, $ty:ty, $len:expr) => {
-        impl $thing {
-            /// Converts the object to a raw pointer
-            #[inline]
-            pub fn as_ptr(&self) -> *const $ty {
-                let &$thing(ref dat) = self;
-                dat.as_ptr()
-            }
-
-            /// Converts the object to a mutable raw pointer
-            #[inline]
-            pub fn as_mut_ptr(&mut self) -> *mut $ty {
-                let &mut $thing(ref mut dat) = self;
-                dat.as_mut_ptr()
-            }
-
-            /// Returns the length of the object as an array
-            #[inline]
-            pub fn len(&self) -> usize { $len }
-
-            /// Returns whether the object, as an array, is empty. Always false.
-            #[inline]
-            pub fn is_empty(&self) -> bool { false }
-
-            /// Returns the underlying bytes.
-            #[inline]
-            pub fn as_bytes(&self) -> &[$ty; $len] { &self.0 }
-
-            /// Returns the underlying bytes.
-            #[inline]
-            pub fn to_bytes(&self) -> [$ty; $len] { self.0.clone() }
-
-            /// Returns the underlying bytes.
-            #[inline]
-            pub fn into_bytes(self) -> [$ty; $len] { self.0 }
-        }
-
-        impl<'a> ::core::convert::From<&'a [$ty]> for $thing {
-            fn from(data: &'a [$ty]) -> $thing {
-                assert_eq!(data.len(), $len);
-                let mut ret = [0; $len];
-                ret.copy_from_slice(&data[..]);
-                $thing(ret)
-            }
-        }
-
-        impl<I> $crate::core::ops::Index<I> for $thing
-        where
-            [$ty]: $crate::core::ops::Index<I>,
-        {
-            type Output = <[$ty] as $crate::core::ops::Index<I>>::Output;
-
-            #[inline]
-            fn index(&self, index: I) -> &Self::Output {
-                &self.0[index]
-            }
-        }
-    }
-}
-
-macro_rules! display_from_debug {
-    ($thing:ident) => {
-        impl ::core::fmt::Display for $thing {
-            fn fmt(&self, f: &mut ::core::fmt::Formatter) -> Result<(), ::core::fmt::Error> {
-                ::core::fmt::Debug::fmt(self, f)
-            }
-        }
-    }
-}
-
-#[cfg(test)]
-macro_rules! hex_script (($s:expr) => (<$crate::Script as ::core::str::FromStr>::from_str($s).unwrap()));
-
-#[cfg(test)]
-macro_rules! hex_hash (($h:ident, $s:expr) => ($h::from_slice(&<$crate::prelude::Vec<u8> as $crate::hashes::hex::FromHex>::from_hex($s).unwrap()).unwrap()));
-
-#[cfg(test)]
-macro_rules! hex_decode (($h:ident, $s:expr) => (deserialize::<$h>(&<$crate::prelude::Vec<u8> as $crate::hashes::hex::FromHex>::from_hex($s).unwrap()).unwrap()));
-
-macro_rules! serde_string_impl {
-    ($name:ident, $expecting:expr) => {
-        #[cfg(feature = "serde")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-        impl<'de> $crate::serde::Deserialize<'de> for $name {
-            fn deserialize<D>(deserializer: D) -> Result<$name, D::Error>
-            where
-                D: $crate::serde::de::Deserializer<'de>,
-            {
-                use ::core::fmt::{self, Formatter};
-                use ::core::str::FromStr;
-
-                struct Visitor;
-                impl<'de> $crate::serde::de::Visitor<'de> for Visitor {
-                    type Value = $name;
-
-                    fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
-                        formatter.write_str($expecting)
-                    }
-
-                    fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
-                    where
-                        E: $crate::serde::de::Error,
-                    {
-                        $name::from_str(v).map_err(E::custom)
-                    }
-
-                    fn visit_borrowed_str<E>(self, v: &'de str) -> Result<Self::Value, E>
-                    where
-                        E: $crate::serde::de::Error,
-                    {
-                        self.visit_str(v)
-                    }
-
-                    fn visit_string<E>(self, v: $crate::prelude::String) -> Result<Self::Value, E>
-                    where
-                        E: $crate::serde::de::Error,
-                    {
-                        self.visit_str(&v)
-                    }
-                }
-
-                deserializer.deserialize_str(Visitor)
-            }
-        }
-
-        #[cfg(feature = "serde")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-        impl<'de> $crate::serde::Serialize for $name {
-            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-            where
-                S: $crate::serde::Serializer,
-            {
-                serializer.collect_str(&self)
-            }
-        }
-    };
-}
-
-/// A combination macro where the human-readable serialization is done like
-/// serde_string_impl and the non-human-readable impl is done as a struct.
-macro_rules! serde_struct_human_string_impl {
-    ($name:ident, $expecting:expr, $($fe:ident),*) => (
-        #[cfg(feature = "serde")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-        impl<'de> $crate::serde::Deserialize<'de> for $name {
-            fn deserialize<D>(deserializer: D) -> Result<$name, D::Error>
-            where
-                D: $crate::serde::de::Deserializer<'de>,
-            {
-                if deserializer.is_human_readable() {
-                    use ::core::fmt::{self, Formatter};
-                    use ::core::str::FromStr;
-
-                    struct Visitor;
-                    impl<'de> $crate::serde::de::Visitor<'de> for Visitor {
-                        type Value = $name;
-
-                        fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
-                            formatter.write_str($expecting)
-                        }
-
-                        fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
-                        where
-                            E: $crate::serde::de::Error,
-                        {
-                            $name::from_str(v).map_err(E::custom)
-                        }
-
-                        fn visit_borrowed_str<E>(self, v: &'de str) -> Result<Self::Value, E>
-                        where
-                            E: $crate::serde::de::Error,
-                        {
-                            self.visit_str(v)
-                        }
-
-                        fn visit_string<E>(self, v: $crate::prelude::String) -> Result<Self::Value, E>
-                        where
-                            E: $crate::serde::de::Error,
-                        {
-                            self.visit_str(&v)
-                        }
-                    }
-
-                    deserializer.deserialize_str(Visitor)
-                } else {
-                    use ::core::fmt::{self, Formatter};
-                    use $crate::serde::de::IgnoredAny;
-
-                    #[allow(non_camel_case_types)]
-                    enum Enum { Unknown__Field, $($fe),* }
-
-                    struct EnumVisitor;
-                    impl<'de> $crate::serde::de::Visitor<'de> for EnumVisitor {
-                        type Value = Enum;
-
-                        fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
-                            formatter.write_str("a field name")
-                        }
-
-                        fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
-                        where
-                            E: $crate::serde::de::Error,
-                        {
-                            match v {
-                                $(
-                                stringify!($fe) => Ok(Enum::$fe)
-                                ),*,
-                                _ => Ok(Enum::Unknown__Field)
-                            }
-                        }
-                    }
-
-                    impl<'de> $crate::serde::Deserialize<'de> for Enum {
-                        fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
-                        where
-                            D: $crate::serde::de::Deserializer<'de>,
-                        {
-                            deserializer.deserialize_str(EnumVisitor)
-                        }
-                    }
-
-                    struct Visitor;
-
-                    impl<'de> $crate::serde::de::Visitor<'de> for Visitor {
-                        type Value = $name;
-
-                        fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
-                            formatter.write_str("a struct")
-                        }
-
-                        fn visit_seq<V>(self, mut seq: V) -> Result<Self::Value, V::Error>
-                        where
-                            V: $crate::serde::de::SeqAccess<'de>,
-                        {
-                            use $crate::serde::de::Error;
-
-                            let length = 0;
-                            $(
-                                let $fe = seq.next_element()?.ok_or_else(|| {
-                                    Error::invalid_length(length, &self)
-                                })?;
-                                #[allow(unused_variables)]
-                                let length = length + 1;
-                            )*
-
-                            let ret = $name {
-                                $($fe: $fe),*
-                            };
-
-                            Ok(ret)
-                        }
-
-                        fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
-                        where
-                            A: $crate::serde::de::MapAccess<'de>,
-                        {
-                            use $crate::serde::de::Error;
-
-                            $(let mut $fe = None;)*
-
-                            loop {
-                                match map.next_key::<Enum>()? {
-                                    Some(Enum::Unknown__Field) => {
-                                        map.next_value::<IgnoredAny>()?;
-                                    }
-                                    $(
-                                        Some(Enum::$fe) => {
-                                            $fe = Some(map.next_value()?);
-                                        }
-                                    )*
-                                    None => { break; }
-                                }
-                            }
-
-                            $(
-                                let $fe = match $fe {
-                                    Some(x) => x,
-                                    None => return Err(A::Error::missing_field(stringify!($fe))),
-                                };
-                            )*
-
-                            let ret = $name {
-                                $($fe: $fe),*
-                            };
-
-                            Ok(ret)
-                        }
-                    }
-                    // end type defs
-
-                    static FIELDS: &'static [&'static str] = &[$(stringify!($fe)),*];
-
-                    deserializer.deserialize_struct(stringify!($name), FIELDS, Visitor)
-                }
-            }
-        }
-
-        #[cfg(feature = "serde")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-        impl<'de> $crate::serde::Serialize for $name {
-            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-            where
-                S: $crate::serde::Serializer,
-            {
-                if serializer.is_human_readable() {
-                    serializer.collect_str(&self)
-                } else {
-                    use $crate::serde::ser::SerializeStruct;
-
-                    // Only used to get the struct length.
-                    static FIELDS: &'static [&'static str] = &[$(stringify!($fe)),*];
-
-                    let mut st = serializer.serialize_struct(stringify!($name), FIELDS.len())?;
-
-                    $(
-                        st.serialize_field(stringify!($fe), &self.$fe)?;
-                    )*
-
-                    st.end()
-                }
-            }
-        }
-    )
-}
-
-/// Implements several traits for byte-based newtypes.
-/// Implements:
-/// - core::fmt::LowerHex (implies hashes::hex::ToHex)
-/// - core::fmt::Display
-/// - core::str::FromStr
-/// - hashes::hex::FromHex
-macro_rules! impl_bytes_newtype {
-    ($t:ident, $len:expr) => (
-
-        impl ::core::fmt::LowerHex for $t {
-            fn fmt(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                for &ch in self.0.iter() {
-                    write!(f, "{:02x}", ch)?;
-                }
-                Ok(())
-            }
-        }
-
-        impl ::core::fmt::Display for $t {
-            fn fmt(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                fmt::LowerHex::fmt(self, f)
-            }
-        }
-
-        impl ::core::fmt::Debug for $t {
-            fn fmt(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                fmt::LowerHex::fmt(self, f)
-            }
-        }
-
-        impl $crate::hashes::hex::FromHex for $t {
-            fn from_byte_iter<I>(iter: I) -> Result<Self, $crate::hashes::hex::Error>
-            where
-                I: ::core::iter::Iterator<Item=Result<u8, $crate::hashes::hex::Error>>
-                + ::core::iter::ExactSizeIterator
-                + ::core::iter::DoubleEndedIterator,
-            {
-                if iter.len() == $len {
-                    let mut ret = [0; $len];
-                    for (n, byte) in iter.enumerate() {
-                        ret[n] = byte?;
-                    }
-                    Ok($t(ret))
-                } else {
-                    Err($crate::hashes::hex::Error::InvalidLength(2 * $len, 2 * iter.len()))
-                }
-            }
-        }
-
-        impl ::core::str::FromStr for $t {
-            type Err = $crate::hashes::hex::Error;
-            fn from_str(s: &str) -> Result<Self, Self::Err> {
-                $crate::hashes::hex::FromHex::from_hex(s)
-            }
-        }
-
-        #[cfg(feature = "serde")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-        impl $crate::serde::Serialize for $t {
-            fn serialize<S: $crate::serde::Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
-                if s.is_human_readable() {
-                    s.serialize_str(&$crate::hashes::hex::ToHex::to_hex(self))
-                } else {
-                    s.serialize_bytes(&self[..])
-                }
-            }
-        }
-
-        #[cfg(feature = "serde")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-        impl<'de> $crate::serde::Deserialize<'de> for $t {
-            fn deserialize<D: $crate::serde::Deserializer<'de>>(d: D) -> Result<$t, D::Error> {
-                if d.is_human_readable() {
-                    struct HexVisitor;
-
-                    impl<'de> $crate::serde::de::Visitor<'de> for HexVisitor {
-                        type Value = $t;
-
-                        fn expecting(&self, formatter: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                            formatter.write_str("an ASCII hex string")
-                        }
-
-                        fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
-                        where
-                            E: $crate::serde::de::Error,
-                        {
-                            if let Ok(hex) = ::core::str::from_utf8(v) {
-                                $crate::hashes::hex::FromHex::from_hex(hex).map_err(E::custom)
-                            } else {
-                                return Err(E::invalid_value($crate::serde::de::Unexpected::Bytes(v), &self));
-                            }
-                        }
-
-                        fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
-                        where
-                            E: $crate::serde::de::Error,
-                        {
-                            $crate::hashes::hex::FromHex::from_hex(v).map_err(E::custom)
-                        }
-                    }
-
-                    d.deserialize_str(HexVisitor)
-                } else {
-                    struct BytesVisitor;
-
-                    impl<'de> $crate::serde::de::Visitor<'de> for BytesVisitor {
-                        type Value = $t;
-
-                        fn expecting(&self, formatter: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                            formatter.write_str("a bytestring")
-                        }
-
-                        fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
-                        where
-                            E: $crate::serde::de::Error,
-                        {
-                            if v.len() != $len {
-                                Err(E::invalid_length(v.len(), &stringify!($len)))
-                            } else {
-                                let mut ret = [0; $len];
-                                ret.copy_from_slice(v);
-                                Ok($t(ret))
-                            }
-                        }
-                    }
-
-                    d.deserialize_bytes(BytesVisitor)
-                }
-            }
-        }
-    )
-}
-
-macro_rules! user_enum {
-    (
-        $(#[$attr:meta])*
-        pub enum $name:ident {
-            $(#[$doc:meta]
-              $elem:ident <-> $txt:expr),*
-        }
-    ) => (
-        $(#[$attr])*
-        pub enum $name {
-            $(#[$doc] $elem),*
-        }
-
-        impl ::core::fmt::Display for $name {
-            fn fmt(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                f.pad(match *self {
-                    $($name::$elem => $txt),*
-                })
-            }
-        }
-
-        impl ::core::str::FromStr for $name {
-            type Err = $crate::io::Error;
-            #[inline]
-            fn from_str(s: &str) -> Result<Self, Self::Err> {
-                match s {
-                    $($txt => Ok($name::$elem)),*,
-                    _ => {
-                        #[cfg(not(feature = "std"))] let message = "Unknown network";
-                        #[cfg(feature = "std")] let message = format!("Unknown network (type {})", s);
-                        Err($crate::io::Error::new(
-                            $crate::io::ErrorKind::InvalidInput,
-                            message,
-                        ))
-                    }
-                }
-            }
-        }
-
-        #[cfg(feature = "serde")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-        impl<'de> $crate::serde::Deserialize<'de> for $name {
-            #[inline]
-            fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
-            where
-                D: $crate::serde::Deserializer<'de>,
-            {
-                use ::core::fmt::{self, Formatter};
-
-                struct Visitor;
-                impl<'de> $crate::serde::de::Visitor<'de> for Visitor {
-                    type Value = $name;
-
-                    fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
-                        formatter.write_str("an enum value")
-                    }
-
-                    fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
-                    where
-                        E: $crate::serde::de::Error,
-                    {
-                        static FIELDS: &'static [&'static str] = &[$(stringify!($txt)),*];
-
-                        $( if v == $txt { Ok($name::$elem) } )else*
-                        else {
-                            Err(E::unknown_variant(v, FIELDS))
-                        }
-                    }
-
-                    fn visit_borrowed_str<E>(self, v: &'de str) -> Result<Self::Value, E>
-                    where
-                        E: $crate::serde::de::Error,
-                    {
-                        self.visit_str(v)
-                    }
-
-                    fn visit_string<E>(self, v: $crate::prelude::String) -> Result<Self::Value, E>
-                    where
-                        E: $crate::serde::de::Error,
-                    {
-                        self.visit_str(&v)
-                    }
-
-                }
-
-                deserializer.deserialize_str(Visitor)
-            }
-        }
-
-        #[cfg(feature = "serde")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-        impl $crate::serde::Serialize for $name {
-            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-            where
-                S: $crate::serde::Serializer,
-            {
-                serializer.collect_str(&self)
-            }
-        }
-    );
-}
diff --git a/src/lib.rs b/src/lib.rs
deleted file mode 100644
index 800b640be..000000000
--- a/src/lib.rs
+++ /dev/null
@@ -1,248 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! # Rust Dash Library
-//!
-//! This is a library that supports the Dash network protocol and associated
-//! primitives. It is designed for Rust programs built to work with the Bitcoin
-//! network.
-//!
-//! It is also written entirely in Rust to illustrate the benefits of strong type
-//! safety, including ownership and lifetime, for financial and/or cryptographic
-//! software.
-//!
-//! See README.md for detailed documentation about development and supported
-//! environments.
-//!
-//! ## Available feature flags
-//!
-//! * `std` - the usual dependency on `std` (default).
-//! * `secp-recovery` - enables calculating public key from a signature and message.
-//! * `signer` - enables singing and validation ECDSA helpers.
-//! * `base64` - (dependency), enables encoding of PSBTs and message signatures.
-//! * `unstable` - enables unstable features for testing.
-//! * `rand` - (dependency), makes it more convenient to generate random values.
-//! * `use-serde` - (dependency), implements `serde`-based serialization and
-//!                 deserialization.
-//! * `secp-lowmemory` - optimizations for low-memory devices.
-//! * `no-std` - enables additional features required for this crate to be usable
-//!              without std. Does **not** disable `std`. Depends on `hashbrown`
-//!              and `core2`.
-//!
-
-#![cfg_attr(all(not(feature = "std"), not(test)), no_std)]
-
-// Experimental features we need
-#![cfg_attr(all(test, feature = "unstable"), feature(test))]
-
-#![cfg_attr(docsrs, feature(doc_cfg))]
-
-// Coding conventions
-#![forbid(unsafe_code)]
-#![deny(non_upper_case_globals)]
-#![deny(non_camel_case_types)]
-#![deny(non_snake_case)]
-#![deny(unused_mut)]
-#![deny(dead_code)]
-#![deny(unused_imports)]
-#![deny(missing_docs)]
-#![deny(unused_must_use)]
-
-// #[rustversion::since(1.48)]
-// #[deny(rustdoc::broken_intra_doc_links)]
-
-#[cfg(not(any(feature = "std", feature = "no-std")))]
-compile_error!("at least one of the `std` or `no-std` features must be enabled");
-
-// Disable 16-bit support at least for now as we can't guarantee it yet.
-#[cfg(target_pointer_width = "16")]
-compile_error!("rust-bitcoin currently only supports architectures with pointers wider
-                than 16 bits, let us know if you want 16-bit support. Note that we do
-                NOT guarantee that we will implement it!");
-
-#[cfg(feature = "no-std")]
-#[macro_use]
-extern crate alloc;
-#[cfg(feature = "no-std")]
-extern crate core2;
-
-// #[cfg(feature = "use-serde")]
-// extern crate serde_big_array;
-
-#[cfg(any(feature = "std", test))]
-extern crate core; // for Rust 1.29 and no-std tests
-
-// Re-exported dependencies.
-#[macro_use] pub extern crate bitcoin_hashes as hashes;
-pub extern crate secp256k1;
-pub extern crate bech32;
-
-#[cfg(feature = "no-std")]
-extern crate hashbrown;
-
-#[cfg(feature = "base64")]
-#[cfg_attr(docsrs, doc(cfg(feature = "base64")))]
-pub extern crate base64;
-
-#[cfg(feature="bitcoinconsensus")] extern crate bitcoinconsensus;
-#[cfg(feature = "serde")] #[macro_use] extern crate serde;
-#[cfg(all(test, feature = "serde"))] extern crate serde_json;
-#[cfg(all(test, feature = "serde"))] extern crate serde_test;
-#[cfg(all(test, feature = "serde"))] extern crate bincode;
-#[cfg(all(test, feature = "unstable"))] extern crate test;
-
-#[cfg(feature = "signer")]
-pub extern crate anyhow;
-
-#[cfg(target_pointer_width = "16")]
-compile_error!("rust-bitcoin cannot be used on 16-bit architectures");
-
-#[cfg(test)]
-#[macro_use]
-mod test_macros;
-#[macro_use]
-mod internal_macros;
-#[cfg(feature = "serde")]
-mod serde_utils;
-
-#[macro_use]
-pub mod network;
-pub mod blockdata;
-pub mod util;
-pub mod consensus;
-pub mod hash_types;
-pub mod policy;
-pub mod ephemerealdata;
-pub mod bls_sig_utils;
-
-pub use hash_types::*;
-pub use blockdata::block::Block;
-pub use blockdata::block::BlockHeader;
-pub use blockdata::script::Script;
-pub use blockdata::transaction::Transaction;
-pub use blockdata::transaction::txin::TxIn;
-pub use blockdata::transaction::txout::TxOut;
-pub use blockdata::transaction::outpoint::OutPoint;
-pub use blockdata::transaction::hash_type::EcdsaSighashType;
-pub use blockdata::witness::Witness;
-pub use ephemerealdata::instant_lock::InstantLock;
-pub use consensus::encode::VarInt;
-pub use network::constants::Network;
-pub use util::Error;
-pub use util::address::Address;
-pub use util::address::AddressType;
-pub use util::amount::Amount;
-pub use util::amount::Denomination;
-pub use util::amount::SignedAmount;
-pub use util::merkleblock::MerkleBlock;
-pub use util::sighash::SchnorrSighashType;
-
-#[cfg(feature = "signer")]
-pub use util::signer;
-
-pub use util::ecdsa::{self, EcdsaSig, EcdsaSigError};
-pub use util::schnorr::{self, SchnorrSig, SchnorrSigError};
-pub use util::key::{PrivateKey, PublicKey, XOnlyPublicKey, KeyPair};
-pub use util::psbt;
-#[allow(deprecated)]
-pub use blockdata::transaction::hash_type::SigHashType;
-
-#[cfg(feature = "std")]
-use std::io;
-#[cfg(not(feature = "std"))]
-use core2::io;
-
-#[cfg(not(feature = "std"))]
-mod io_extras {
-    /// A writer which will move data into the void.
-    pub struct Sink {
-        _priv: (),
-    }
-
-    /// Creates an instance of a writer which will successfully consume all data.
-    pub const fn sink() -> Sink {
-        Sink { _priv: () }
-    }
-
-    impl core2::io::Write for Sink {
-        #[inline]
-        fn write(&mut self, buf: &[u8]) -> core2::io::Result<usize> {
-            Ok(buf.len())
-        }
-
-        #[inline]
-        fn flush(&mut self) -> core2::io::Result<()> {
-            Ok(())
-        }
-    }
-}
-
-mod prelude {
-    #[cfg(all(not(feature = "std"), not(test)))]
-    pub use alloc::{string::{String, ToString}, vec::Vec, boxed::Box, borrow::{Cow, ToOwned}, slice, rc, sync};
-
-    #[cfg(any(feature = "std", test))]
-    pub use std::{string::{String, ToString}, vec::Vec, boxed::Box, borrow::{Cow, ToOwned}, slice, rc, sync};
-
-    #[cfg(all(not(feature = "std"), not(test)))]
-    pub use alloc::collections::{BTreeMap, BTreeSet, btree_map, BinaryHeap};
-
-    #[cfg(any(feature = "std", test))]
-    pub use std::collections::{BTreeMap, BTreeSet, btree_map, BinaryHeap};
-
-    #[cfg(feature = "std")]
-    pub use std::io::sink;
-
-    #[cfg(not(feature = "std"))]
-    pub use io_extras::sink;
-
-    #[cfg(feature = "hashbrown")]
-    pub use hashbrown::HashSet;
-
-    #[cfg(not(feature = "hashbrown"))]
-    pub use std::collections::HashSet;
-}
-
-#[cfg(all(test, feature = "unstable"))] use tests::EmptyWrite;
-
-#[cfg(all(test, feature = "unstable"))]
-mod tests {
-    use core::fmt::Arguments;
-    use io::{IoSlice, Result, Write};
-
-    #[derive(Default, Clone, Debug, PartialEq, Eq)]
-    pub struct EmptyWrite;
-
-    impl Write for EmptyWrite {
-        fn write(&mut self, buf: &[u8]) -> Result<usize> {
-            Ok(buf.len())
-        }
-        fn write_vectored(&mut self, bufs: &[IoSlice]) -> Result<usize> {
-            Ok(bufs.iter().map(|s| s.len()).sum())
-        }
-        fn flush(&mut self) -> Result<()> {
-            Ok(())
-        }
-
-        fn write_all(&mut self, _: &[u8]) -> Result<()> {
-            Ok(())
-        }
-        fn write_fmt(&mut self, _: Arguments) -> Result<()> {
-            Ok(())
-        }
-    }
-}
diff --git a/src/network/message.rs b/src/network/message.rs
deleted file mode 100644
index 3ce7db870..000000000
--- a/src/network/message.rs
+++ /dev/null
@@ -1,631 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Bitcoin network messages.
-//!
-//! This module defines the `NetworkMessage` and `RawNetworkMessage` types that
-//! are used for (de)serializing Bitcoin objects for transmission on the network.
-//!
-
-use prelude::*;
-
-use core::{mem, fmt, iter};
-
-use io;
-use blockdata::block;
-use blockdata::transaction;
-use network::address::{Address, AddrV2Message};
-use network::{message_network, message_bloom};
-use network::message_blockdata;
-use network::message_filter;
-use consensus::encode::{CheckedData, Decodable, Encodable, VarInt, MAX_VEC_SIZE};
-use consensus::{encode, serialize};
-use util::merkleblock::MerkleBlock;
-
-/// The maximum number of [super::message_blockdata::Inventory] items in an `inv` message.
-///
-/// This limit is not currently enforced by this implementation.
-pub const MAX_INV_SIZE: usize = 50_000;
-
-/// Serializer for command string
-#[derive(PartialEq, Eq, Clone, Debug)]
-pub struct CommandString(Cow<'static, str>);
-
-impl CommandString {
-    /// Convert from various string types into a [CommandString].
-    ///
-    /// Supported types are:
-    /// - `&'static str`
-    /// - `String`
-    ///
-    /// Returns an error if and only if the string is
-    /// larger than 12 characters in length.
-    pub fn try_from<S: Into<Cow<'static, str>>>(s: S) -> Result<CommandString, CommandStringError> {
-        let cow = s.into();
-        if cow.len() > 12 {
-            Err(CommandStringError { cow })
-        } else {
-            Ok(CommandString(cow))
-        }
-    }
-}
-
-impl fmt::Display for CommandString {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(self.0.as_ref())
-    }
-}
-
-impl AsRef<str> for CommandString {
-    fn as_ref(&self) -> &str {
-        self.0.as_ref()
-    }
-}
-
-impl Encodable for CommandString {
-    #[inline]
-    fn consensus_encode<S: io::Write>(&self, s: S) -> Result<usize, io::Error> {
-        let mut rawbytes = [0u8; 12];
-        let strbytes = self.0.as_bytes();
-        debug_assert!(strbytes.len() <= 12);
-        rawbytes[..strbytes.len()].copy_from_slice(strbytes);
-        rawbytes.consensus_encode(s)
-    }
-}
-
-impl Decodable for CommandString {
-    #[inline]
-    fn consensus_decode<D: io::Read>(d: D) -> Result<Self, encode::Error> {
-        let rawbytes: [u8; 12] = Decodable::consensus_decode(d)?;
-        let rv = iter::FromIterator::from_iter(
-            rawbytes
-                .iter()
-                .filter_map(|&u| if u > 0 { Some(u as char) } else { None })
-        );
-        Ok(CommandString(rv))
-    }
-}
-
-/// Error returned when a command string is invalid.
-///
-/// This is currently returned for command strings longer than 12.
-#[derive(Clone, Debug)]
-pub struct CommandStringError {
-    cow: Cow<'static, str>,
-}
-
-impl fmt::Display for CommandStringError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "the command string '{}' has length {} which is larger than 12", self.cow, self.cow.len())
-    }
-}
-
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-#[cfg(feature = "std")]
-impl ::std::error::Error for CommandStringError {}
-
-/// A Network message
-#[derive(Clone, Debug, PartialEq, Eq)]
-pub struct RawNetworkMessage {
-    /// Magic bytes to identify the network these messages are meant for
-    pub magic: u32,
-    /// The actual message data
-    pub payload: NetworkMessage
-}
-
-/// A Network message payload. Proper documentation is available on at
-/// [Bitcoin Wiki: Protocol Specification](https://en.bitcoin.it/wiki/Protocol_specification)
-#[derive(Clone, PartialEq, Eq, Debug)]
-pub enum NetworkMessage {
-    /// `version`
-    Version(message_network::VersionMessage),
-    /// `verack`
-    Verack,
-    /// `addr`
-    Addr(Vec<(u32, Address)>),
-    /// `inv`
-    Inv(Vec<message_blockdata::Inventory>),
-    /// `getdata`
-    GetData(Vec<message_blockdata::Inventory>),
-    /// `notfound`
-    NotFound(Vec<message_blockdata::Inventory>),
-    /// `getblocks`
-    GetBlocks(message_blockdata::GetBlocksMessage),
-    /// `getheaders`
-    GetHeaders(message_blockdata::GetHeadersMessage),
-    /// `mempool`
-    MemPool,
-    /// tx
-    Tx(transaction::Transaction),
-    /// `block`
-    Block(block::Block),
-    /// `headers`
-    Headers(Vec<block::BlockHeader>),
-    /// `sendheaders`
-    SendHeaders,
-    /// `getaddr`
-    GetAddr,
-    // TODO: checkorder,
-    // TODO: submitorder,
-    // TODO: reply,
-    /// `ping`
-    Ping(u64),
-    /// `pong`
-    Pong(u64),
-    /// `merkleblock`
-    MerkleBlock(MerkleBlock),
-    /// BIP 37 `filterload`
-    FilterLoad(message_bloom::FilterLoad),
-    /// BIP 37 `filteradd`
-    FilterAdd(message_bloom::FilterAdd),
-    /// BIP 37 `filterclear`
-    FilterClear,
-    /// BIP157 getcfilters
-    GetCFilters(message_filter::GetCFilters),
-    /// BIP157 cfilter
-    CFilter(message_filter::CFilter),
-    /// BIP157 getcfheaders
-    GetCFHeaders(message_filter::GetCFHeaders),
-    /// BIP157 cfheaders
-    CFHeaders(message_filter::CFHeaders),
-    /// BIP157 getcfcheckpt
-    GetCFCheckpt(message_filter::GetCFCheckpt),
-    /// BIP157 cfcheckpt
-    CFCheckpt(message_filter::CFCheckpt),
-    /// `alert`
-    Alert(Vec<u8>),
-    /// `reject`
-    Reject(message_network::Reject),
-    /// `feefilter`
-    FeeFilter(i64),
-    /// `wtxidrelay`
-    WtxidRelay,
-    /// `addrv2`
-    AddrV2(Vec<AddrV2Message>),
-    /// `sendaddrv2`
-    SendAddrV2,
-
-    /// Any other message.
-    Unknown {
-        /// The command of this message.
-        command: CommandString,
-        /// The payload of this message.
-        payload: Vec<u8>,
-    }
-}
-
-impl NetworkMessage {
-    /// Return the message command as a static string reference.
-    ///
-    /// This returns `"unknown"` for [NetworkMessage::Unknown],
-    /// regardless of the actual command in the unknown message.
-    /// Use the [Self::command] method to get the command for unknown messages.
-    pub fn cmd(&self) -> &'static str {
-        match *self {
-            NetworkMessage::Version(_) => "version",
-            NetworkMessage::Verack     => "verack",
-            NetworkMessage::Addr(_)    => "addr",
-            NetworkMessage::Inv(_)     => "inv",
-            NetworkMessage::GetData(_) => "getdata",
-            NetworkMessage::NotFound(_) => "notfound",
-            NetworkMessage::GetBlocks(_) => "getblocks",
-            NetworkMessage::GetHeaders(_) => "getheaders",
-            NetworkMessage::MemPool    => "mempool",
-            NetworkMessage::Tx(_)      => "tx",
-            NetworkMessage::Block(_)   => "block",
-            NetworkMessage::Headers(_) => "headers",
-            NetworkMessage::SendHeaders => "sendheaders",
-            NetworkMessage::GetAddr    => "getaddr",
-            NetworkMessage::Ping(_)    => "ping",
-            NetworkMessage::Pong(_)    => "pong",
-            NetworkMessage::MerkleBlock(_) => "merkleblock",
-            NetworkMessage::FilterLoad(_) => "filterload",
-            NetworkMessage::FilterAdd(_)    => "filteradd",
-            NetworkMessage::FilterClear    => "filterclear",
-            NetworkMessage::GetCFilters(_) => "getcfilters",
-            NetworkMessage::CFilter(_) => "cfilter",
-            NetworkMessage::GetCFHeaders(_) => "getcfheaders",
-            NetworkMessage::CFHeaders(_) => "cfheaders",
-            NetworkMessage::GetCFCheckpt(_) => "getcfcheckpt",
-            NetworkMessage::CFCheckpt(_) => "cfcheckpt",
-            NetworkMessage::Alert(_)    => "alert",
-            NetworkMessage::Reject(_)    => "reject",
-            NetworkMessage::FeeFilter(_) => "feefilter",
-            NetworkMessage::WtxidRelay => "wtxidrelay",
-            NetworkMessage::AddrV2(_) => "addrv2",
-            NetworkMessage::SendAddrV2 => "sendaddrv2",
-            NetworkMessage::Unknown { .. } => "unknown",
-        }
-    }
-
-    /// Return the CommandString for the message command.
-    pub fn command(&self) -> CommandString {
-        match *self {
-            NetworkMessage::Unknown { command: ref c, .. } => c.clone(),
-            _ => CommandString::try_from(self.cmd()).expect("cmd returns valid commands")
-        }
-    }
-}
-
-impl RawNetworkMessage {
-    /// Return the message command as a static string reference.
-    ///
-    /// This returns `"unknown"` for [NetworkMessage::Unknown],
-    /// regardless of the actual command in the unknown message.
-    /// Use the [Self::command] method to get the command for unknown messages.
-    pub fn cmd(&self) -> &'static str {
-        self.payload.cmd()
-    }
-
-    /// Return the CommandString for the message command.
-    pub fn command(&self) -> CommandString {
-        self.payload.command()
-    }
-}
-
-struct HeaderSerializationWrapper<'a>(&'a Vec<block::BlockHeader>);
-
-impl<'a> Encodable for HeaderSerializationWrapper<'a> {
-    #[inline]
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let mut len = 0;
-        len += VarInt(self.0.len() as u64).consensus_encode(&mut s)?;
-        for header in self.0.iter() {
-            len += header.consensus_encode(&mut s)?;
-            len += 0u8.consensus_encode(&mut s)?;
-        }
-        Ok(len)
-    }
-}
-
-impl Encodable for RawNetworkMessage {
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let mut len = 0;
-        len += self.magic.consensus_encode(&mut s)?;
-        len += self.command().consensus_encode(&mut s)?;
-        len += CheckedData(match self.payload {
-            NetworkMessage::Version(ref dat) => serialize(dat),
-            NetworkMessage::Addr(ref dat)    => serialize(dat),
-            NetworkMessage::Inv(ref dat)     => serialize(dat),
-            NetworkMessage::GetData(ref dat) => serialize(dat),
-            NetworkMessage::NotFound(ref dat) => serialize(dat),
-            NetworkMessage::GetBlocks(ref dat) => serialize(dat),
-            NetworkMessage::GetHeaders(ref dat) => serialize(dat),
-            NetworkMessage::Tx(ref dat)      => serialize(dat),
-            NetworkMessage::Block(ref dat)   => serialize(dat),
-            NetworkMessage::Headers(ref dat) => serialize(&HeaderSerializationWrapper(dat)),
-            NetworkMessage::Ping(ref dat)    => serialize(dat),
-            NetworkMessage::Pong(ref dat)    => serialize(dat),
-            NetworkMessage::MerkleBlock(ref dat)    => serialize(dat),
-            NetworkMessage::FilterLoad(ref dat)    => serialize(dat),
-            NetworkMessage::FilterAdd(ref dat)    => serialize(dat),
-            NetworkMessage::GetCFilters(ref dat) => serialize(dat),
-            NetworkMessage::CFilter(ref dat) => serialize(dat),
-            NetworkMessage::GetCFHeaders(ref dat) => serialize(dat),
-            NetworkMessage::CFHeaders(ref dat) => serialize(dat),
-            NetworkMessage::GetCFCheckpt(ref dat) => serialize(dat),
-            NetworkMessage::CFCheckpt(ref dat) => serialize(dat),
-            NetworkMessage::Alert(ref dat)    => serialize(dat),
-            NetworkMessage::Reject(ref dat) => serialize(dat),
-            NetworkMessage::FeeFilter(ref data) => serialize(data),
-            NetworkMessage::AddrV2(ref dat) => serialize(dat),
-            NetworkMessage::Verack
-            | NetworkMessage::SendHeaders
-            | NetworkMessage::MemPool
-            | NetworkMessage::GetAddr
-            | NetworkMessage::WtxidRelay
-            | NetworkMessage::FilterClear
-            | NetworkMessage::SendAddrV2 => vec![],
-            NetworkMessage::Unknown { payload: ref data, .. } => serialize(data),
-        }).consensus_encode(&mut s)?;
-        Ok(len)
-    }
-}
-
-struct HeaderDeserializationWrapper(Vec<block::BlockHeader>);
-
-impl Decodable for HeaderDeserializationWrapper {
-    #[inline]
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let len = VarInt::consensus_decode(&mut d)?.0;
-        let byte_size = (len as usize)
-                            .checked_mul(mem::size_of::<block::BlockHeader>())
-                            .ok_or(encode::Error::ParseFailed("Invalid length"))?;
-        if byte_size > MAX_VEC_SIZE {
-            return Err(encode::Error::OversizedVectorAllocation { requested: byte_size, max: MAX_VEC_SIZE })
-        }
-        let mut ret = Vec::with_capacity(len as usize);
-        for _ in 0..len {
-            ret.push(Decodable::consensus_decode(&mut d)?);
-            if u8::consensus_decode(&mut d)? != 0u8 {
-                return Err(encode::Error::ParseFailed("Headers message should not contain transactions"));
-            }
-        }
-        Ok(HeaderDeserializationWrapper(ret))
-    }
-}
-
-impl Decodable for RawNetworkMessage {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let magic = Decodable::consensus_decode(&mut d)?;
-        let cmd = CommandString::consensus_decode(&mut d)?;
-        let raw_payload = CheckedData::consensus_decode(&mut d)?.0;
-
-        let mut mem_d = io::Cursor::new(raw_payload);
-        let payload = match &cmd.0[..] {
-            "version" => NetworkMessage::Version(Decodable::consensus_decode(&mut mem_d)?),
-            "verack"  => NetworkMessage::Verack,
-            "addr"    => NetworkMessage::Addr(Decodable::consensus_decode(&mut mem_d)?),
-            "inv"     => NetworkMessage::Inv(Decodable::consensus_decode(&mut mem_d)?),
-            "getdata" => NetworkMessage::GetData(Decodable::consensus_decode(&mut mem_d)?),
-            "notfound" => NetworkMessage::NotFound(Decodable::consensus_decode(&mut mem_d)?),
-            "getblocks" => NetworkMessage::GetBlocks(Decodable::consensus_decode(&mut mem_d)?),
-            "getheaders" => NetworkMessage::GetHeaders(Decodable::consensus_decode(&mut mem_d)?),
-            "mempool" => NetworkMessage::MemPool,
-            "block"   => NetworkMessage::Block(Decodable::consensus_decode(&mut mem_d)?),
-            "headers" => NetworkMessage::Headers(
-                HeaderDeserializationWrapper::consensus_decode(&mut mem_d)?.0
-            ),
-            "sendheaders" => NetworkMessage::SendHeaders,
-            "getaddr" => NetworkMessage::GetAddr,
-            "ping"    => NetworkMessage::Ping(Decodable::consensus_decode(&mut mem_d)?),
-            "pong"    => NetworkMessage::Pong(Decodable::consensus_decode(&mut mem_d)?),
-            "merkleblock" => NetworkMessage::MerkleBlock(Decodable::consensus_decode(&mut mem_d)?),
-            "filterload" => NetworkMessage::FilterLoad(Decodable::consensus_decode(&mut mem_d)?),
-            "filteradd" => NetworkMessage::FilterAdd(Decodable::consensus_decode(&mut mem_d)?),
-            "filterclear" => NetworkMessage::FilterClear,
-            "tx"      => NetworkMessage::Tx(Decodable::consensus_decode(&mut mem_d)?),
-            "getcfilters" => NetworkMessage::GetCFilters(Decodable::consensus_decode(&mut mem_d)?),
-            "cfilter" => NetworkMessage::CFilter(Decodable::consensus_decode(&mut mem_d)?),
-            "getcfheaders" => NetworkMessage::GetCFHeaders(Decodable::consensus_decode(&mut mem_d)?),
-            "cfheaders" => NetworkMessage::CFHeaders(Decodable::consensus_decode(&mut mem_d)?),
-            "getcfcheckpt" => NetworkMessage::GetCFCheckpt(Decodable::consensus_decode(&mut mem_d)?),
-            "cfcheckpt" => NetworkMessage::CFCheckpt(Decodable::consensus_decode(&mut mem_d)?),
-            "reject" => NetworkMessage::Reject(Decodable::consensus_decode(&mut mem_d)?),
-            "alert"   => NetworkMessage::Alert(Decodable::consensus_decode(&mut mem_d)?),
-            "feefilter" => NetworkMessage::FeeFilter(Decodable::consensus_decode(&mut mem_d)?),
-            "wtxidrelay" => NetworkMessage::WtxidRelay,
-            "addrv2" => NetworkMessage::AddrV2(Decodable::consensus_decode(&mut mem_d)?),
-            "sendaddrv2" => NetworkMessage::SendAddrV2,
-            _ => NetworkMessage::Unknown {
-                command: cmd,
-                payload: mem_d.into_inner(),
-            }
-        };
-        Ok(RawNetworkMessage {
-            magic,
-            payload,
-        })
-    }
-}
-
-#[cfg(test)]
-mod test {
-    use std::net::Ipv4Addr;
-    use super::{RawNetworkMessage, NetworkMessage, CommandString};
-    use network::constants::ServiceFlags;
-    use consensus::encode::{deserialize, deserialize_partial, serialize};
-    use hashes::hex::FromHex;
-    use hashes::sha256d::Hash;
-    use hashes::Hash as HashTrait;
-    use network::address::{Address, AddrV2, AddrV2Message};
-    use super::message_network::{Reject, RejectReason, VersionMessage};
-    use network::message_blockdata::{Inventory, GetBlocksMessage, GetHeadersMessage};
-    use blockdata::block::{Block, BlockHeader};
-    use network::message_filter::{GetCFilters, CFilter, GetCFHeaders, CFHeaders, GetCFCheckpt, CFCheckpt};
-    use blockdata::transaction::Transaction;
-    use blockdata::script::Script;
-    use network::message_bloom::{FilterAdd, FilterLoad, BloomFlags};
-    use MerkleBlock;
-
-    fn hash(slice: [u8;32]) -> Hash {
-        Hash::from_slice(&slice).unwrap()
-    }
-
-    #[test]
-    fn full_round_ser_der_raw_network_message_test() {
-        // TODO: Impl Rand traits here to easily generate random values.
-        let version_msg: VersionMessage = deserialize(&Vec::from_hex("721101000100000000000000e6e0845300000000010000000000000000000000000000000000ffff0000000000000100000000000000fd87d87eeb4364f22cf54dca59412db7208d47d920cffce83ee8102f5361746f7368693a302e392e39392f2c9f040001").unwrap()).unwrap();
-        let tx: Transaction = deserialize(&Vec::from_hex("0100000001a15d57094aa7a21a28cb20b59aab8fc7d1149a3bdbcddba9c622e4f5f6a99ece010000006c493046022100f93bb0e7d8db7bd46e40132d1f8242026e045f03a0efe71bbb8e3f475e970d790221009337cd7f1f929f00cc6ff01f03729b069a7c21b59b1736ddfee5db5946c5da8c0121033b9b137ee87d5a812d6f506efdd37f0affa7ffc310711c06c7f3e097c9447c52ffffffff0100e1f505000000001976a9140389035a9225b3839e2bbf32d826a1e222031fd888ac00000000").unwrap()).unwrap();
-        let block: Block = deserialize(&include_bytes!("../../test_data/testnet_block_000000000000045e0b1660b6445b5e5c5ab63c9a4f956be7e1e69be04fa4497b.raw")[..]).unwrap();
-        let header: BlockHeader = deserialize(&Vec::from_hex("010000004ddccd549d28f385ab457e98d1b11ce80bfea2c5ab93015ade4973e400000000bf4473e53794beae34e64fccc471dace6ae544180816f89591894e0f417a914cd74d6e49ffff001d323b3a7b").unwrap()).unwrap();
-        let script: Script = deserialize(&Vec::from_hex("1976a91431a420903c05a0a7de2de40c9f02ebedbacdc17288ac").unwrap()).unwrap();
-        let merkle_block: MerkleBlock = deserialize(&Vec::from_hex("0100000079cda856b143d9db2c1caff01d1aecc8630d30625d10e8b4b8b0000000000000b50cc069d6a3e33e3ff84a5c41d9d3febe7c770fdcc96b2c3ff60abe184f196367291b4d4c86041b8fa45d630100000001b50cc069d6a3e33e3ff84a5c41d9d3febe7c770fdcc96b2c3ff60abe184f19630101").unwrap()).unwrap();
-
-        let msgs = vec![
-            NetworkMessage::Version(version_msg),
-            NetworkMessage::Verack,
-            NetworkMessage::Addr(vec![(45, Address::new(&([123,255,000,100], 833).into(), ServiceFlags::NETWORK))]),
-            NetworkMessage::Inv(vec![Inventory::Block(hash([8u8; 32]).into())]),
-            NetworkMessage::GetData(vec![Inventory::Transaction(hash([45u8; 32]).into())]),
-            NetworkMessage::NotFound(vec![Inventory::Error]),
-            NetworkMessage::GetBlocks(GetBlocksMessage::new(vec![hash([1u8; 32]).into(), hash([4u8; 32]).into()], hash([5u8; 32]).into())),
-            NetworkMessage::GetHeaders(GetHeadersMessage::new(vec![hash([10u8; 32]).into(), hash([40u8; 32]).into()], hash([50u8; 32]).into())),
-            NetworkMessage::MemPool,
-            NetworkMessage::Tx(tx),
-            NetworkMessage::Block(block),
-            NetworkMessage::Headers(vec![header]),
-            NetworkMessage::SendHeaders,
-            NetworkMessage::GetAddr,
-            NetworkMessage::Ping(15),
-            NetworkMessage::Pong(23),
-            NetworkMessage::MerkleBlock(merkle_block),
-            NetworkMessage::FilterLoad(FilterLoad {filter: Vec::from_hex("03614e9b050000000000000001").unwrap(), hash_funcs: 1, tweak: 2, flags: BloomFlags::All}),
-            NetworkMessage::FilterAdd(FilterAdd {data: script.as_bytes().to_vec()}),
-            NetworkMessage::FilterAdd(FilterAdd {data: hash([29u8; 32]).to_vec()}),
-            NetworkMessage::FilterClear,
-            NetworkMessage::GetCFilters(GetCFilters{filter_type: 2, start_height: 52, stop_hash: hash([42u8; 32]).into()}),
-            NetworkMessage::CFilter(CFilter{filter_type: 7, block_hash: hash([25u8; 32]).into(), filter: vec![1,2,3]}),
-            NetworkMessage::GetCFHeaders(GetCFHeaders{filter_type: 4, start_height: 102, stop_hash: hash([47u8; 32]).into()}),
-            NetworkMessage::CFHeaders(CFHeaders{filter_type: 13, stop_hash: hash([53u8; 32]).into(), previous_filter_header: hash([12u8; 32]).into(), filter_hashes: vec![hash([4u8; 32]).into(), hash([12u8; 32]).into()]}),
-            NetworkMessage::GetCFCheckpt(GetCFCheckpt{filter_type: 17, stop_hash: hash([25u8; 32]).into()}),
-            NetworkMessage::CFCheckpt(CFCheckpt{filter_type: 27, stop_hash: hash([77u8; 32]).into(), filter_headers: vec![hash([3u8; 32]).into(), hash([99u8; 32]).into()]}),
-            NetworkMessage::Alert(vec![45,66,3,2,6,8,9,12,3,130]),
-            NetworkMessage::Reject(Reject{message: "Test reject".into(), ccode: RejectReason::Duplicate, reason: "Cause".into(), hash: hash([255u8; 32])}),
-            NetworkMessage::FeeFilter(1000),
-            NetworkMessage::WtxidRelay,
-            NetworkMessage::AddrV2(vec![AddrV2Message{ addr: AddrV2::Ipv4(Ipv4Addr::new(127, 0, 0, 1)), port: 0, services: ServiceFlags::NONE, time: 0 }]),
-            NetworkMessage::SendAddrV2,
-        ];
-
-        for msg in msgs {
-            let raw_msg = RawNetworkMessage {magic: 57, payload: msg};
-            assert_eq!(deserialize::<RawNetworkMessage>(&serialize(&raw_msg)).unwrap(), raw_msg);
-        }
-
-    }
-
-    #[test]
-    fn commandstring_test() {
-        // Test converting.
-        assert_eq!(CommandString::try_from("AndrewAndrew").unwrap().as_ref(), "AndrewAndrew");
-        assert!(CommandString::try_from("AndrewAndrewA").is_err());
-
-        // Test serializing.
-        let cs = CommandString("Andrew".into());
-        assert_eq!(serialize(&cs), vec![0x41u8, 0x6e, 0x64, 0x72, 0x65, 0x77, 0, 0, 0, 0, 0, 0]);
-
-        // Test deserializing
-        let cs: Result<CommandString, _> = deserialize(&[0x41u8, 0x6e, 0x64, 0x72, 0x65, 0x77, 0, 0, 0, 0, 0, 0]);
-        assert!(cs.is_ok());
-        assert_eq!(cs.as_ref().unwrap().to_string(), "Andrew".to_owned());
-        assert_eq!(cs.unwrap(), CommandString::try_from("Andrew").unwrap());
-
-        let short_cs: Result<CommandString, _> = deserialize(&[0x41u8, 0x6e, 0x64, 0x72, 0x65, 0x77, 0, 0, 0, 0, 0]);
-        assert!(short_cs.is_err());
-    }
-
-    #[test]
-    fn serialize_verack_test() {
-        assert_eq!(serialize(&RawNetworkMessage { magic: 0xd9b4bef9, payload: NetworkMessage::Verack }),
-                             vec![0xf9, 0xbe, 0xb4, 0xd9, 0x76, 0x65, 0x72, 0x61,
-                                  0x63, 0x6B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-                                  0x00, 0x00, 0x00, 0x00, 0x5d, 0xf6, 0xe0, 0xe2]);
-    }
-
-    #[test]
-    fn serialize_ping_test() {
-        assert_eq!(serialize(&RawNetworkMessage { magic: 0xd9b4bef9, payload: NetworkMessage::Ping(100) }),
-                             vec![0xf9, 0xbe, 0xb4, 0xd9, 0x70, 0x69, 0x6e, 0x67,
-                                  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-                                  0x08, 0x00, 0x00, 0x00, 0x24, 0x67, 0xf1, 0x1d,
-                                  0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
-    }
-
-
-    #[test]
-    fn serialize_mempool_test() {
-        assert_eq!(serialize(&RawNetworkMessage { magic: 0xd9b4bef9, payload: NetworkMessage::MemPool }),
-                             vec![0xf9, 0xbe, 0xb4, 0xd9, 0x6d, 0x65, 0x6d, 0x70,
-                                  0x6f, 0x6f, 0x6c, 0x00, 0x00, 0x00, 0x00, 0x00,
-                                  0x00, 0x00, 0x00, 0x00, 0x5d, 0xf6, 0xe0, 0xe2]);
-    }
-
-    #[test]
-    fn serialize_getaddr_test() {
-        assert_eq!(serialize(&RawNetworkMessage { magic: 0xd9b4bef9, payload: NetworkMessage::GetAddr }),
-                             vec![0xf9, 0xbe, 0xb4, 0xd9, 0x67, 0x65, 0x74, 0x61,
-                                  0x64, 0x64, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00,
-                                  0x00, 0x00, 0x00, 0x00, 0x5d, 0xf6, 0xe0, 0xe2]);
-    }
-
-    #[test]
-    fn deserialize_getaddr_test() {
-        let msg = deserialize(
-            &[0xf9, 0xbe, 0xb4, 0xd9, 0x67, 0x65, 0x74, 0x61,
-                0x64, 0x64, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00,
-                0x00, 0x00, 0x00, 0x00, 0x5d, 0xf6, 0xe0, 0xe2]);
-        let preimage = RawNetworkMessage { magic: 0xd9b4bef9, payload: NetworkMessage::GetAddr };
-        assert!(msg.is_ok());
-        let msg : RawNetworkMessage = msg.unwrap();
-        assert_eq!(preimage.magic, msg.magic);
-        assert_eq!(preimage.payload, msg.payload);
-    }
-
-    #[test]
-    fn deserialize_version_test() {
-        let msg = deserialize::<RawNetworkMessage>(
-            &[  0xf9, 0xbe, 0xb4, 0xd9, 0x76, 0x65, 0x72, 0x73,
-                0x69, 0x6f, 0x6e, 0x00, 0x00, 0x00, 0x00, 0x00,
-                0x66, 0x00, 0x00, 0x00, 0xbe, 0x61, 0xb8, 0x27,
-                0x7f, 0x11, 0x01, 0x00, 0x0d, 0x04, 0x00, 0x00,
-                0x00, 0x00, 0x00, 0x00, 0xf0, 0x0f, 0x4d, 0x5c,
-                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
-                0x5b, 0xf0, 0x8c, 0x80, 0xb4, 0xbd, 0x0d, 0x04,
-                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-                0xfa, 0xa9, 0x95, 0x59, 0xcc, 0x68, 0xa1, 0xc1,
-                0x10, 0x2f, 0x53, 0x61, 0x74, 0x6f, 0x73, 0x68,
-                0x69, 0x3a, 0x30, 0x2e, 0x31, 0x37, 0x2e, 0x31,
-                0x2f, 0x93, 0x8c, 0x08, 0x00, 0x01 ]);
-
-        assert!(msg.is_ok());
-        let msg = msg.unwrap();
-        assert_eq!(msg.magic, 0xd9b4bef9);
-        if let NetworkMessage::Version(version_msg) = msg.payload {
-            assert_eq!(version_msg.version, 70015);
-            assert_eq!(version_msg.services, ServiceFlags::NETWORK | ServiceFlags::BLOOM | ServiceFlags::WITNESS | ServiceFlags::NETWORK_LIMITED);
-            assert_eq!(version_msg.timestamp, 1548554224);
-            assert_eq!(version_msg.nonce, 13952548347456104954);
-            assert_eq!(version_msg.user_agent, "/Satoshi:0.17.1/");
-            assert_eq!(version_msg.start_height, 560275);
-            assert_eq!(version_msg.relay, true);
-        } else {
-            panic!("Wrong message type");
-        }
-    }
-
-    #[test]
-    fn deserialize_partial_message_test() {
-        let data = [  0xf9, 0xbe, 0xb4, 0xd9, 0x76, 0x65, 0x72, 0x73,
-            0x69, 0x6f, 0x6e, 0x00, 0x00, 0x00, 0x00, 0x00,
-            0x66, 0x00, 0x00, 0x00, 0xbe, 0x61, 0xb8, 0x27,
-            0x7f, 0x11, 0x01, 0x00, 0x0d, 0x04, 0x00, 0x00,
-            0x00, 0x00, 0x00, 0x00, 0xf0, 0x0f, 0x4d, 0x5c,
-            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
-            0x5b, 0xf0, 0x8c, 0x80, 0xb4, 0xbd, 0x0d, 0x04,
-            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-            0xfa, 0xa9, 0x95, 0x59, 0xcc, 0x68, 0xa1, 0xc1,
-            0x10, 0x2f, 0x53, 0x61, 0x74, 0x6f, 0x73, 0x68,
-            0x69, 0x3a, 0x30, 0x2e, 0x31, 0x37, 0x2e, 0x31,
-            0x2f, 0x93, 0x8c, 0x08, 0x00, 0x01, 0, 0 ];
-        let msg = deserialize_partial::<RawNetworkMessage>(&data);
-        assert!(msg.is_ok());
-
-        let (msg, consumed) = msg.unwrap();
-        assert_eq!(consumed, data.to_vec().len() - 2);
-        assert_eq!(msg.magic, 0xd9b4bef9);
-        if let NetworkMessage::Version(version_msg) = msg.payload {
-            assert_eq!(version_msg.version, 70015);
-            assert_eq!(version_msg.services, ServiceFlags::NETWORK | ServiceFlags::BLOOM | ServiceFlags::WITNESS | ServiceFlags::NETWORK_LIMITED);
-            assert_eq!(version_msg.timestamp, 1548554224);
-            assert_eq!(version_msg.nonce, 13952548347456104954);
-            assert_eq!(version_msg.user_agent, "/Satoshi:0.17.1/");
-            assert_eq!(version_msg.start_height, 560275);
-            assert_eq!(version_msg.relay, true);
-        } else {
-            panic!("Wrong message type");
-        }
-    }
-}
diff --git a/src/network/stream_reader.rs b/src/network/stream_reader.rs
deleted file mode 100644
index b9eaf22bb..000000000
--- a/src/network/stream_reader.rs
+++ /dev/null
@@ -1,324 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Stream reader.
-//!
-//! Deprecated
-//!
-//! This module defines `StreamReader` struct and its implementation which is used
-//! for parsing incoming stream into separate `Decodable`s, handling assembling
-//! messages from multiple packets or dealing with partial or multiple messages in the stream
-//! (like can happen with reading from TCP socket)
-//!
-
-use core::fmt;
-use io::{Read, BufReader};
-
-use consensus::{encode, Decodable};
-
-/// Struct used to configure stream reader function
-pub struct StreamReader<R: Read> {
-    /// Stream to read from
-    pub stream: BufReader<R>,
-}
-
-impl<R: Read> fmt::Debug for StreamReader<R> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "StreamReader")
-    }
-}
-
-impl<R: Read> StreamReader<R> {
-    /// Constructs new stream reader for a given input stream `stream`
-    #[deprecated(since = "0.28.0", note = "wrap your stream into a buffered reader if necessary and use consensus_encode directly")]
-    pub fn new(stream: R, _buffer_size: Option<usize>) -> StreamReader<R> {
-        StreamReader {
-            stream: BufReader::new(stream),
-        }
-    }
-
-    /// Reads stream and parses next message from its current input
-    #[deprecated(since = "0.28.0", note = "wrap your stream into a buffered reader if necessary and use consensus_encode directly")]
-    pub fn read_next<D: Decodable>(&mut self) -> Result<D, encode::Error> {
-        Decodable::consensus_decode(&mut self.stream)
-    }
-}
-
-#[allow(deprecated)]
-#[cfg(test)]
-mod test {
-    use std::thread;
-    use std::time::Duration;
-    use io::{BufReader, Write};
-    use std::net::{TcpListener, TcpStream, Shutdown};
-    use std::thread::JoinHandle;
-    use network::constants::ServiceFlags;
-
-    use super::StreamReader;
-    use network::message::{NetworkMessage, RawNetworkMessage};
-
-    // First, let's define some byte arrays for sample messages - dumps are taken from live
-    // Bitcoin Core node v0.17.1 with Wireshark
-    const MSG_VERSION: [u8; 126] = [
-        0xf9, 0xbe, 0xb4, 0xd9, 0x76, 0x65, 0x72, 0x73,
-        0x69, 0x6f, 0x6e, 0x00, 0x00, 0x00, 0x00, 0x00,
-        0x66, 0x00, 0x00, 0x00, 0xbe, 0x61, 0xb8, 0x27,
-        0x7f, 0x11, 0x01, 0x00, 0x0d, 0x04, 0x00, 0x00,
-        0x00, 0x00, 0x00, 0x00, 0xf0, 0x0f, 0x4d, 0x5c,
-        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
-        0x5b, 0xf0, 0x8c, 0x80, 0xb4, 0xbd, 0x0d, 0x04,
-        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-        0xfa, 0xa9, 0x95, 0x59, 0xcc, 0x68, 0xa1, 0xc1,
-        0x10, 0x2f, 0x53, 0x61, 0x74, 0x6f, 0x73, 0x68,
-        0x69, 0x3a, 0x30, 0x2e, 0x31, 0x37, 0x2e, 0x31,
-        0x2f, 0x93, 0x8c, 0x08, 0x00, 0x01
-    ];
-
-    const MSG_VERACK: [u8; 24] = [
-        0xf9, 0xbe, 0xb4, 0xd9, 0x76, 0x65, 0x72, 0x61,
-        0x63, 0x6b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-        0x00, 0x00, 0x00, 0x00, 0x5d, 0xf6, 0xe0, 0xe2
-    ];
-
-    const MSG_PING: [u8; 32] = [
-        0xf9, 0xbe, 0xb4, 0xd9, 0x70, 0x69, 0x6e, 0x67,
-        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-        0x08, 0x00, 0x00, 0x00, 0x24, 0x67, 0xf1, 0x1d,
-        0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    ];
-
-    const MSG_ALERT: [u8; 192] = [
-        0xf9, 0xbe, 0xb4, 0xd9, 0x61, 0x6c, 0x65, 0x72,
-        0x74, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-        0xa8, 0x00, 0x00, 0x00, 0x1b, 0xf9, 0xaa, 0xea,
-        0x60, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-        0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
-        0x7f, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
-        0x7f, 0xfe, 0xff, 0xff, 0x7f, 0x01, 0xff, 0xff,
-        0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
-        0xff, 0x7f, 0x00, 0xff, 0xff, 0xff, 0x7f, 0x00,
-        0x2f, 0x55, 0x52, 0x47, 0x45, 0x4e, 0x54, 0x3a,
-        0x20, 0x41, 0x6c, 0x65, 0x72, 0x74, 0x20, 0x6b,
-        0x65, 0x79, 0x20, 0x63, 0x6f, 0x6d, 0x70, 0x72,
-        0x6f, 0x6d, 0x69, 0x73, 0x65, 0x64, 0x2c, 0x20,
-        0x75, 0x70, 0x67, 0x72, 0x61, 0x64, 0x65, 0x20,
-        0x72, 0x65, 0x71, 0x75, 0x69, 0x72, 0x65, 0x64,
-        0x00, 0x46, 0x30, 0x44, 0x02, 0x20, 0x65, 0x3f,
-        0xeb, 0xd6, 0x41, 0x0f, 0x47, 0x0f, 0x6b, 0xae,
-        0x11, 0xca, 0xd1, 0x9c, 0x48, 0x41, 0x3b, 0xec,
-        0xb1, 0xac, 0x2c, 0x17, 0xf9, 0x08, 0xfd, 0x0f,
-        0xd5, 0x3b, 0xdc, 0x3a, 0xbd, 0x52, 0x02, 0x20,
-        0x6d, 0x0e, 0x9c, 0x96, 0xfe, 0x88, 0xd4, 0xa0,
-        0xf0, 0x1e, 0xd9, 0xde, 0xda, 0xe2, 0xb6, 0xf9,
-        0xe0, 0x0d, 0xa9, 0x4c, 0xad, 0x0f, 0xec, 0xaa,
-        0xe6, 0x6e, 0xcf, 0x68, 0x9b, 0xf7, 0x1b, 0x50
-    ];
-
-    // Helper functions that checks parsed versions of the messages from the byte arrays above
-    fn check_version_msg(msg: &RawNetworkMessage) {
-        assert_eq!(msg.magic, 0xd9b4bef9);
-        if let NetworkMessage::Version(ref version_msg) = msg.payload {
-            assert_eq!(version_msg.version, 70015);
-            assert_eq!(version_msg.services, ServiceFlags::NETWORK | ServiceFlags::BLOOM | ServiceFlags::WITNESS | ServiceFlags::NETWORK_LIMITED);
-            assert_eq!(version_msg.timestamp, 1548554224);
-            assert_eq!(version_msg.nonce, 13952548347456104954);
-            assert_eq!(version_msg.user_agent, "/Satoshi:0.17.1/");
-            assert_eq!(version_msg.start_height, 560275);
-            assert_eq!(version_msg.relay, true);
-        } else {
-            panic!("Wrong message type: expected VersionMessage");
-        }
-    }
-
-    fn check_alert_msg(msg: &RawNetworkMessage) {
-        assert_eq!(msg.magic, 0xd9b4bef9);
-        if let NetworkMessage::Alert(ref alert) = msg.payload {
-            assert_eq!(alert.clone(), [
-                0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-                0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
-                0x7f, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
-                0x7f, 0xfe, 0xff, 0xff, 0x7f, 0x01, 0xff, 0xff,
-                0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
-                0xff, 0x7f, 0x00, 0xff, 0xff, 0xff, 0x7f, 0x00,
-                0x2f, 0x55, 0x52, 0x47, 0x45, 0x4e, 0x54, 0x3a,
-                0x20, 0x41, 0x6c, 0x65, 0x72, 0x74, 0x20, 0x6b,
-                0x65, 0x79, 0x20, 0x63, 0x6f, 0x6d, 0x70, 0x72,
-                0x6f, 0x6d, 0x69, 0x73, 0x65, 0x64, 0x2c, 0x20,
-                0x75, 0x70, 0x67, 0x72, 0x61, 0x64, 0x65, 0x20,
-                0x72, 0x65, 0x71, 0x75, 0x69, 0x72, 0x65, 0x64,
-                0x00,
-            ].to_vec());
-        } else {
-            panic!("Wrong message type: expected AlertMessage");
-        }
-    }
-
-    #[test]
-    fn read_singlemsg_test() {
-        let stream = MSG_VERSION[..].to_vec();
-        let stream = stream.as_slice();
-        let message = StreamReader::new(stream, None).read_next().unwrap();
-        check_version_msg(&message);
-    }
-
-    #[test]
-    fn read_doublemsgs_test() {
-        let mut stream = MSG_VERSION.to_vec();
-        stream.extend(&MSG_PING);
-        let stream = stream.as_slice();
-        let mut reader = StreamReader::new(stream, None);
-        let message = reader.read_next().unwrap();
-        check_version_msg(&message);
-
-        let msg: RawNetworkMessage = reader.read_next().unwrap();
-        assert_eq!(msg.magic, 0xd9b4bef9);
-        if let NetworkMessage::Ping(nonce) = msg.payload {
-            assert_eq!(nonce, 100);
-        } else {
-            panic!("Wrong message type, expected PingMessage");
-        }
-    }
-
-    // Helper function that set ups emulation of client-server TCP connection for
-    // testing message transfer via TCP packets
-    fn serve_tcp(pieces: Vec<Vec<u8>>) -> (JoinHandle<()>, BufReader<TcpStream>) {
-        // 1. Creating server part (emulating Bitcoin Core node)
-        let listener = TcpListener::bind(format!("127.0.0.1:{}", 0)).unwrap();
-        let port = listener.local_addr().unwrap().port();
-        // 2. Spawning thread that will be writing our messages to the TCP Stream at the server side
-        // in async mode
-        let handle = thread::spawn(move || {
-            for ostream in listener.incoming() {
-                let mut ostream = ostream.unwrap();
-
-                for piece in pieces {
-                    ostream.write(&piece[..]).unwrap();
-                    ostream.flush().unwrap();
-                    thread::sleep(Duration::from_secs(1));
-                }
-
-                ostream.shutdown(Shutdown::Both).unwrap();
-                break;
-            }
-        });
-
-        // 3. Creating client side of the TCP socket connection
-        thread::sleep(Duration::from_secs(1));
-        let istream = TcpStream::connect(format!("127.0.0.1:{}", port)).unwrap();
-        let reader = BufReader::new(istream);
-
-        (handle, reader)
-    }
-
-    #[test]
-    fn read_multipartmsg_test() {
-        // Setting up TCP connection emulation
-        let (handle, istream) = serve_tcp(vec![
-            // single message split in two parts to emulate real network conditions
-            MSG_VERSION[..24].to_vec(), MSG_VERSION[24..].to_vec()
-        ]);
-        let stream = istream;
-        let mut reader = StreamReader::new(stream, None);
-
-        // Reading and checking the whole message back
-        let message = reader.read_next().unwrap();
-        check_version_msg(&message);
-
-        // Waiting TCP server thread to terminate
-        handle.join().unwrap();
-    }
-
-    #[test]
-    fn read_sequencemsg_test() {
-        // Setting up TCP connection emulation
-        let (handle, istream) = serve_tcp(vec![
-            // Real-world Bitcoin core communication case for /Satoshi:0.17.1/
-            MSG_VERSION[..23].to_vec(), MSG_VERSION[23..].to_vec(),
-            MSG_VERACK.to_vec(),
-            MSG_ALERT[..24].to_vec(), MSG_ALERT[24..].to_vec()
-        ]);
-        let stream = istream;
-        let mut reader = StreamReader::new(stream, None);
-
-        // Reading and checking the first message (Version)
-        let message = reader.read_next().unwrap();
-        check_version_msg(&message);
-
-        // Reading and checking the second message (Verack)
-        let msg: RawNetworkMessage = reader.read_next().unwrap();
-        assert_eq!(msg.magic, 0xd9b4bef9);
-        assert_eq!(msg.payload, NetworkMessage::Verack, "Wrong message type, expected VerackMessage");
-
-        // Reading and checking the third message (Alert)
-        let msg = reader.read_next().unwrap();
-        check_alert_msg(&msg);
-
-        // Waiting TCP server thread to terminate
-        handle.join().unwrap();
-    }
-
-    #[test]
-    fn read_block_from_file_test() {
-        use io;
-        use consensus::serialize;
-        use hashes::hex::FromHex;
-        use Block;
-
-        let normal_data = Vec::from_hex("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").unwrap();
-        let cutoff_data = Vec::from_hex("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").unwrap();
-        let prevhash = Vec::from_hex("4ddccd549d28f385ab457e98d1b11ce80bfea2c5ab93015ade4973e400000000").unwrap();
-        let merkle = Vec::from_hex("bf4473e53794beae34e64fccc471dace6ae544180816f89591894e0f417a914c").unwrap();
-
-        let stream = io::BufReader::new(&normal_data[..]);
-        let mut reader = StreamReader::new(stream, None);
-        let normal_block = reader.read_next::<Block>();
-
-        let stream = io::BufReader::new(&cutoff_data[..]);
-        let mut reader = StreamReader::new(stream, None);
-        let cutoff_block = reader.read_next::<Block>();
-
-        assert!(normal_block.is_ok());
-        assert!(cutoff_block.is_err());
-        let block = normal_block.unwrap();
-        assert_eq!(block.header.version, 1);
-        assert_eq!(serialize(&block.header.prev_blockhash), prevhash);
-        assert_eq!(serialize(&block.header.merkle_root), merkle);
-        assert_eq!(block.header.time, 1231965655);
-        assert_eq!(block.header.bits, 486604799);
-        assert_eq!(block.header.nonce, 2067413810);
-
-        // should be also ok for a non-witness block as commitment is optional in that case
-        assert!(block.check_witness_commitment());
-    }
-
-    #[test]
-    fn parse_multipartmsg_test() {
-        let mut multi = MSG_ALERT.to_vec();
-        multi.extend(&MSG_ALERT[..]);
-        let mut reader = StreamReader::new(&multi[..], None);
-        let message: Result<RawNetworkMessage, _> = reader.read_next();
-        assert!(message.is_ok());
-        check_alert_msg(&message.unwrap());
-        let message: Result<RawNetworkMessage, _> = reader.read_next();
-        assert!(message.is_ok());
-        check_alert_msg(&message.unwrap());
-    }
-}
diff --git a/src/serde_utils.rs b/src/serde_utils.rs
deleted file mode 100644
index fc5d534aa..000000000
--- a/src/serde_utils.rs
+++ /dev/null
@@ -1,284 +0,0 @@
-//! Dash serde utilities.
-//!
-//! This module is for special serde serializations.
-//!
-
-pub mod btreemap_byte_values {
-    //! Module for serialization of BTreeMaps with hex byte values.
-    #![allow(missing_docs)]
-
-    // NOTE: This module can be exactly copied to use with HashMap.
-
-    use prelude::*;
-    use hashes::hex::{FromHex, ToHex};
-    use serde;
-
-    pub fn serialize<S, T>(v: &BTreeMap<T, Vec<u8>>, s: S) -> Result<S::Ok, S::Error>
-    where
-        S: serde::Serializer,
-        T: serde::Serialize + ::core::hash::Hash + Eq + Ord,
-    {
-        use serde::ser::SerializeMap;
-
-        // Don't do anything special when not human readable.
-        if !s.is_human_readable() {
-            serde::Serialize::serialize(v, s)
-        } else {
-            let mut map = s.serialize_map(Some(v.len()))?;
-            for (key, value) in v.iter() {
-                map.serialize_entry(key, &value.to_hex())?;
-            }
-            map.end()
-        }
-    }
-
-    pub fn deserialize<'de, D, T>(d: D) -> Result<BTreeMap<T, Vec<u8>>, D::Error>
-    where
-        D: serde::Deserializer<'de>,
-        T: serde::Deserialize<'de> + ::core::hash::Hash + Eq + Ord,
-    {
-        use ::core::marker::PhantomData;
-
-        struct Visitor<T>(PhantomData<T>);
-        impl<'de, T> serde::de::Visitor<'de> for Visitor<T>
-        where
-            T: serde::Deserialize<'de> + ::core::hash::Hash + Eq + Ord,
-        {
-            type Value = BTreeMap<T, Vec<u8>>;
-
-            fn expecting(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                write!(f, "a map with hexadecimal values")
-            }
-
-            fn visit_map<A: serde::de::MapAccess<'de>>(self, mut a: A)
-                -> Result<Self::Value, A::Error>
-            {
-                let mut ret = BTreeMap::new();
-                while let Some((key, value)) = a.next_entry()? {
-                    ret.insert(key, FromHex::from_hex(value).map_err(serde::de::Error::custom)?);
-                }
-                Ok(ret)
-            }
-        }
-
-        // Don't do anything special when not human readable.
-        if !d.is_human_readable() {
-            serde::Deserialize::deserialize(d)
-        } else {
-            d.deserialize_map(Visitor(PhantomData))
-        }
-    }
-}
-
-pub mod btreemap_as_seq {
-    //! Module for serialization of BTreeMaps as lists of sequences because
-    //! serde_json will not serialize hashmaps with non-string keys be default.
-    #![allow(missing_docs)]
-
-    // NOTE: This module can be exactly copied to use with HashMap.
-
-    use prelude::*;
-    use serde;
-
-    pub fn serialize<S, T, U>(v: &BTreeMap<T, U>, s: S) -> Result<S::Ok, S::Error>
-    where
-        S: serde::Serializer,
-        T: serde::Serialize + ::core::hash::Hash + Eq + Ord,
-        U: serde::Serialize,
-    {
-        use serde::ser::SerializeSeq;
-
-        // Don't do anything special when not human readable.
-        if !s.is_human_readable() {
-            serde::Serialize::serialize(v, s)
-        } else {
-            let mut seq = s.serialize_seq(Some(v.len()))?;
-            for pair in v.iter() {
-                seq.serialize_element(&pair)?;
-            }
-            seq.end()
-        }
-    }
-
-    pub fn deserialize<'de, D, T, U>(d: D) -> Result<BTreeMap<T, U>, D::Error>
-    where
-        D: serde::Deserializer<'de>,
-        T: serde::Deserialize<'de> + ::core::hash::Hash + Eq + Ord,
-        U: serde::Deserialize<'de>,
-    {
-        use ::core::marker::PhantomData;
-
-        struct Visitor<T, U>(PhantomData<(T, U)>);
-        impl<'de, T, U> serde::de::Visitor<'de> for Visitor<T, U>
-        where
-            T: serde::Deserialize<'de> + ::core::hash::Hash + Eq + Ord,
-            U: serde::Deserialize<'de>,
-        {
-            type Value = BTreeMap<T, U>;
-
-            fn expecting(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                write!(f, "a sequence of pairs")
-            }
-
-            fn visit_seq<A: serde::de::SeqAccess<'de>>(self, mut a: A)
-                -> Result<Self::Value, A::Error>
-            {
-                let mut ret = BTreeMap::new();
-                while let Some((key, value)) = a.next_element()? {
-                    ret.insert(key, value);
-                }
-                Ok(ret)
-            }
-        }
-
-        // Don't do anything special when not human readable.
-        if !d.is_human_readable() {
-            serde::Deserialize::deserialize(d)
-        } else {
-            d.deserialize_seq(Visitor(PhantomData))
-        }
-    }
-}
-
-pub mod btreemap_as_seq_byte_values {
-    //! Module for serialization of BTreeMaps as lists of sequences because
-    //! serde_json will not serialize hashmaps with non-string keys be default.
-    #![allow(missing_docs)]
-
-    // NOTE: This module can be exactly copied to use with HashMap.
-
-    use prelude::*;
-    use serde;
-
-    /// A custom key-value pair type that serialized the bytes as hex.
-    #[derive(Debug, Deserialize)]
-    struct OwnedPair<T>(
-        T,
-        #[serde(deserialize_with = "::serde_utils::hex_bytes::deserialize")]
-        Vec<u8>,
-    );
-
-    /// A custom key-value pair type that serialized the bytes as hex.
-    #[derive(Debug, Serialize)]
-    struct BorrowedPair<'a, T: 'static>(
-        &'a T,
-        #[serde(serialize_with = "::serde_utils::hex_bytes::serialize")]
-        &'a [u8],
-    );
-
-    pub fn serialize<S, T>(v: &BTreeMap<T, Vec<u8>>, s: S) -> Result<S::Ok, S::Error>
-    where
-        S: serde::Serializer,
-        T: serde::Serialize + ::core::hash::Hash + Eq + Ord + 'static,
-    {
-        use serde::ser::SerializeSeq;
-
-        // Don't do anything special when not human readable.
-        if !s.is_human_readable() {
-            serde::Serialize::serialize(v, s)
-        } else {
-            let mut seq = s.serialize_seq(Some(v.len()))?;
-            for (key, value) in v.iter() {
-                seq.serialize_element(&BorrowedPair(key, value))?;
-            }
-            seq.end()
-        }
-    }
-
-    pub fn deserialize<'de, D, T>(d: D) -> Result<BTreeMap<T, Vec<u8>>, D::Error>
-    where
-        D: serde::Deserializer<'de>,
-        T: serde::Deserialize<'de> + ::core::hash::Hash + Eq + Ord,
-    {
-        use ::core::marker::PhantomData;
-
-        struct Visitor<T>(PhantomData<T>);
-        impl<'de, T> serde::de::Visitor<'de> for Visitor<T>
-        where
-            T: serde::Deserialize<'de> + ::core::hash::Hash + Eq + Ord,
-        {
-            type Value = BTreeMap<T, Vec<u8>>;
-
-            fn expecting(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                write!(f, "a sequence of pairs")
-            }
-
-            fn visit_seq<A: serde::de::SeqAccess<'de>>(self, mut a: A)
-                -> Result<Self::Value, A::Error>
-            {
-                let mut ret = BTreeMap::new();
-                while let Option::Some(OwnedPair(key, value)) = a.next_element()? {
-                    ret.insert(key, value);
-                }
-                Ok(ret)
-            }
-        }
-
-        // Don't do anything special when not human readable.
-        if !d.is_human_readable() {
-            serde::Deserialize::deserialize(d)
-        } else {
-            d.deserialize_seq(Visitor(PhantomData))
-        }
-    }
-}
-
-pub mod hex_bytes {
-    //! Module for serialization of byte arrays as hex strings.
-    #![allow(missing_docs)]
-
-    use hashes::hex::{FromHex, ToHex};
-    use serde;
-
-    pub fn serialize<T, S>(bytes: &T, s: S) -> Result<S::Ok, S::Error>
-    where
-        T: serde::Serialize + AsRef<[u8]>, S: serde::Serializer
-    {
-        // Don't do anything special when not human readable.
-        if !s.is_human_readable() {
-            serde::Serialize::serialize(bytes, s)
-        } else {
-            s.serialize_str(&bytes.as_ref().to_hex())
-        }
-    }
-
-    pub fn deserialize<'de, D, B>(d: D) -> Result<B, D::Error>
-    where
-        D: serde::Deserializer<'de>, B: serde::Deserialize<'de> + FromHex,
-    {
-        struct Visitor<B>(::core::marker::PhantomData<B>);
-
-        impl<'de, B: FromHex> serde::de::Visitor<'de> for Visitor<B> {
-            type Value = B;
-
-            fn expecting(&self, formatter: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                formatter.write_str("an ASCII hex string")
-            }
-
-            fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
-            where
-                E: serde::de::Error,
-            {
-                if let Ok(hex) = ::core::str::from_utf8(v) {
-                    FromHex::from_hex(hex).map_err(E::custom)
-                } else {
-                    return Err(E::invalid_value(serde::de::Unexpected::Bytes(v), &self));
-                }
-            }
-
-            fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
-            where
-                E: serde::de::Error,
-            {
-                FromHex::from_hex(v).map_err(E::custom)
-            }
-        }
-
-        // Don't do anything special when not human readable.
-        if !d.is_human_readable() {
-            serde::Deserialize::deserialize(d)
-        } else {
-            d.deserialize_str(Visitor(::core::marker::PhantomData))
-        }
-    }
-}
diff --git a/src/util/address.rs b/src/util/address.rs
deleted file mode 100644
index 275b7fa8e..000000000
--- a/src/util/address.rs
+++ /dev/null
@@ -1,1417 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Dash
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Dash addresses.
-//!
-//! Support for ordinary base58 Dash addresses and private keys.
-//!
-//! # Example: creating a new address from a randomly-generated key pair
-//!
-//! ```rust
-//! use dashcore::network::constants::Network;
-//! use dashcore::util::address::Address;
-//! use dashcore::PublicKey;
-//! use dashcore::secp256k1::Secp256k1;
-//! use dashcore::secp256k1::rand::thread_rng;
-//!
-//! // Generate random key pair.
-//! let s = Secp256k1::new();
-//! let public_key = PublicKey::new(s.generate_keypair(&mut thread_rng()).1);
-//!
-//! // Generate pay-to-pubkey-hash address.
-//! let address = Address::p2pkh(&public_key, Network::Dash);
-//! ```
-
-use prelude::*;
-
-use core::fmt;
-use core::num::ParseIntError;
-use core::str::FromStr;
-#[cfg(feature = "std")] use std::error;
-
-use secp256k1::{Secp256k1, Verification, XOnlyPublicKey};
-use bech32;
-use hashes::{sha256, Hash, HashEngine};
-use hash_types::{PubkeyHash, ScriptHash};
-use blockdata::{script, opcodes};
-use blockdata::constants::{PUBKEY_ADDRESS_PREFIX_MAIN, SCRIPT_ADDRESS_PREFIX_MAIN, PUBKEY_ADDRESS_PREFIX_TEST, SCRIPT_ADDRESS_PREFIX_TEST, MAX_SCRIPT_ELEMENT_SIZE};
-use network::constants::Network;
-use util::base58;
-use util::taproot::TapBranchHash;
-use util::key::PublicKey;
-use blockdata::script::Instruction;
-use util::schnorr::{TapTweak, UntweakedPublicKey, TweakedPublicKey};
-
-/// Address error.
-#[derive(Debug, PartialEq, Eq, Clone)]
-pub enum Error {
-    /// Base58 encoding error.
-    Base58(base58::Error),
-    /// Bech32 encoding error.
-    Bech32(bech32::Error),
-    /// The bech32 payload was empty.
-    EmptyBech32Payload,
-    /// The wrong checksum algorithm was used. See BIP-0350.
-    InvalidBech32Variant {
-        /// Bech32 variant that is required by the used Witness version.
-        expected: bech32::Variant,
-        /// The actual Bech32 variant encoded in the address representation.
-        found: bech32::Variant
-    },
-    /// Script version must be 0 to 16 inclusive.
-    InvalidWitnessVersion(u8),
-    /// Unable to parse witness version from string.
-    UnparsableWitnessVersion(ParseIntError),
-    /// Dash script opcode does not match any known witness version, the script is malformed.
-    MalformedWitnessVersion,
-    /// The witness program must be between 2 and 40 bytes in length.
-    InvalidWitnessProgramLength(usize),
-    /// A v0 witness program must be either of length 20 or 32.
-    InvalidSegwitV0ProgramLength(usize),
-    /// An uncompressed pubkey was used where it is not allowed.
-    UncompressedPubkey,
-    /// Address size more than 520 bytes is not allowed.
-    ExcessiveScriptSize
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            Error::Base58(_) => write!(f, "base58 address encoding error"),
-            Error::Bech32(_) => write!(f, "bech32 address encoding error"),
-            Error::EmptyBech32Payload => write!(f, "the bech32 payload was empty"),
-            Error::InvalidBech32Variant { expected, found } => write!(f, "invalid bech32 checksum variant found {:?} when {:?} was expected", found, expected),
-            Error::InvalidWitnessVersion(v) => write!(f, "invalid witness script version: {}", v),
-            Error::UnparsableWitnessVersion(_) => write!(f, "incorrect format of a witness version byte"),
-            Error::MalformedWitnessVersion => f.write_str("Dash script opcode does not match any known witness version, the script is malformed"),
-            Error::InvalidWitnessProgramLength(l) => write!(f, "the witness program must be between 2 and 40 bytes in length: length={}", l),
-            Error::InvalidSegwitV0ProgramLength(l) => write!(f, "a v0 witness program must be either of length 20 or 32 bytes: length={}", l),
-            Error::UncompressedPubkey => write!(f, "an uncompressed pubkey was used where it is not allowed"),
-            Error::ExcessiveScriptSize => write!(f, "Script size exceed 520 bytes"),
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl ::std::error::Error for Error {
-    fn cause(&self) -> Option<&dyn  error::Error> {
-        match *self {
-            Error::Base58(ref e) => Some(e),
-            Error::Bech32(ref e) => Some(e),
-            Error::UnparsableWitnessVersion(ref e) => Some(e),
-            _ => None,
-        }
-    }
-}
-
-#[doc(hidden)]
-impl From<base58::Error> for Error {
-    fn from(e: base58::Error) -> Error {
-        Error::Base58(e)
-    }
-}
-
-#[doc(hidden)]
-impl From<bech32::Error> for Error {
-    fn from(e: bech32::Error) -> Error {
-        Error::Bech32(e)
-    }
-}
-
-/// The different types of addresses.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub enum AddressType {
-    /// Pay to pubkey hash.
-    P2pkh,
-    /// Pay to script hash.
-    P2sh,
-    /// Pay to witness pubkey hash.
-    P2wpkh,
-    /// Pay to witness script hash.
-    P2wsh,
-    /// Pay to taproot.
-    P2tr,
-}
-
-impl fmt::Display for AddressType {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(match *self {
-            AddressType::P2pkh => "p2pkh",
-            AddressType::P2sh => "p2sh",
-            AddressType::P2wpkh => "p2wpkh",
-            AddressType::P2wsh => "p2wsh",
-            AddressType::P2tr => "p2tr",
-        })
-    }
-}
-
-impl FromStr for AddressType {
-    type Err = ();
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s {
-            "p2pkh" => Ok(AddressType::P2pkh),
-            "p2sh" => Ok(AddressType::P2sh),
-            "p2wpkh" => Ok(AddressType::P2wpkh),
-            "p2wsh" => Ok(AddressType::P2wsh),
-            "p2tr" => Ok(AddressType::P2tr),
-            _ => Err(()),
-        }
-    }
-}
-
-/// Version of the witness program.
-///
-/// Helps limit possible versions of the witness according to the specification. If a plain `u8`
-/// type was used instead it would mean that the version may be > 16, which would be incorrect.
-///
-/// First byte of `scriptPubkey` in transaction output for transactions starting with opcodes
-/// ranging from 0 to 16 (inclusive).
-#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-#[repr(u8)]
-pub enum WitnessVersion {
-    /// Initial version of witness program. Used for P2WPKH and P2WPK outputs
-    V0 = 0,
-    /// Version of witness program used for Taproot P2TR outputs.
-    V1 = 1,
-    /// Future (unsupported) version of witness program.
-    V2 = 2,
-    /// Future (unsupported) version of witness program.
-    V3 = 3,
-    /// Future (unsupported) version of witness program.
-    V4 = 4,
-    /// Future (unsupported) version of witness program.
-    V5 = 5,
-    /// Future (unsupported) version of witness program.
-    V6 = 6,
-    /// Future (unsupported) version of witness program.
-    V7 = 7,
-    /// Future (unsupported) version of witness program.
-    V8 = 8,
-    /// Future (unsupported) version of witness program.
-    V9 = 9,
-    /// Future (unsupported) version of witness program.
-    V10 = 10,
-    /// Future (unsupported) version of witness program.
-    V11 = 11,
-    /// Future (unsupported) version of witness program.
-    V12 = 12,
-    /// Future (unsupported) version of witness program.
-    V13 = 13,
-    /// Future (unsupported) version of witness program.
-    V14 = 14,
-    /// Future (unsupported) version of witness program.
-    V15 = 15,
-    /// Future (unsupported) version of witness program.
-    V16 = 16,
-}
-
-/// Prints [`WitnessVersion`] number (from 0 to 16) as integer, without
-/// any prefix or suffix.
-impl fmt::Display for WitnessVersion {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{}", *self as u8)
-    }
-}
-
-
-impl FromStr for WitnessVersion {
-    type Err = Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let version = s.parse().map_err(Error::UnparsableWitnessVersion)?;
-        WitnessVersion::from_num(version)
-    }
-}
-
-impl WitnessVersion {
-    /// Converts 5-bit unsigned integer value matching single symbol from Bech32(m) address encoding
-    /// ([`bech32::u5`]) into [`WitnessVersion`] variant.
-    ///
-    /// # Returns
-    /// Version of the Witness program.
-    ///
-    /// # Errors
-    /// If the integer does not correspond to any witness version, errors with
-    /// [`Error::InvalidWitnessVersion`].
-    pub fn from_u5(value: ::bech32::u5) -> Result<Self, Error> {
-        WitnessVersion::from_num(value.to_u8())
-    }
-
-    /// Converts an 8-bit unsigned integer value into [`WitnessVersion`] variant.
-    ///
-    /// # Returns
-    /// Version of the Witness program.
-    ///
-    /// # Errors
-    /// If the integer does not correspond to any witness version, errors with
-    /// [`Error::InvalidWitnessVersion`].
-    pub fn from_num(no: u8) -> Result<Self, Error> {
-        Ok(match no {
-            0 => WitnessVersion::V0,
-            1 => WitnessVersion::V1,
-            2 => WitnessVersion::V2,
-            3 => WitnessVersion::V3,
-            4 => WitnessVersion::V4,
-            5 => WitnessVersion::V5,
-            6 => WitnessVersion::V6,
-            7 => WitnessVersion::V7,
-            8 => WitnessVersion::V8,
-            9 => WitnessVersion::V9,
-            10 => WitnessVersion::V10,
-            11 => WitnessVersion::V11,
-            12 => WitnessVersion::V12,
-            13 => WitnessVersion::V13,
-            14 => WitnessVersion::V14,
-            15 => WitnessVersion::V15,
-            16 => WitnessVersion::V16,
-            wrong => return Err(Error::InvalidWitnessVersion(wrong)),
-        })
-    }
-
-    /// Converts Dash script opcode into [`WitnessVersion`] variant.
-    ///
-    /// # Returns
-    /// Version of the Witness program (for opcodes in range of `OP_0`..`OP_16`).
-    ///
-    /// # Errors
-    /// If the opcode does not correspond to any witness version, errors with
-    /// [`Error::MalformedWitnessVersion`].
-    pub fn from_opcode(opcode: opcodes::All) -> Result<Self, Error> {
-        match opcode.into_u8() {
-            0 => Ok(WitnessVersion::V0),
-            version if version >= opcodes::all::OP_PUSHNUM_1.into_u8() && version <= opcodes::all::OP_PUSHNUM_16.into_u8() =>
-                WitnessVersion::from_num(version - opcodes::all::OP_PUSHNUM_1.into_u8() + 1),
-            _ => Err(Error::MalformedWitnessVersion)
-        }
-    }
-
-    /// Converts Dash script [`Instruction`] (parsed opcode) into [`WitnessVersion`] variant.
-    ///
-    /// # Returns
-    /// Version of the Witness program for [`Instruction::Op`] and [`Instruction::PushBytes`] with
-    /// byte value within `1..=16` range.
-    ///
-    /// # Errors
-    /// If the opcode does not correspond to any witness version, errors with
-    /// [`Error::MalformedWitnessVersion`] for the rest of opcodes.
-    pub fn from_instruction(instruction: Instruction) -> Result<Self, Error> {
-        match instruction {
-            Instruction::Op(op) => WitnessVersion::from_opcode(op),
-            Instruction::PushBytes(bytes) if bytes.is_empty() => Ok(WitnessVersion::V0),
-            Instruction::PushBytes(_) => Err(Error::MalformedWitnessVersion),
-        }
-    }
-
-    /// Returns integer version number representation for a given [`WitnessVersion`] value.
-    ///
-    /// NB: this is not the same as an integer representation of the opcode signifying witness
-    /// version in Dash script. Thus, there is no function to directly convert witness version
-    /// into a byte since the conversion requires context (Dash script or just a version number).
-    pub fn into_num(self) -> u8 {
-        self as u8
-    }
-
-    /// Determines the checksum variant. See BIP-0350 for specification.
-    pub fn bech32_variant(&self) -> bech32::Variant {
-        match self {
-            WitnessVersion::V0 => bech32::Variant::Bech32,
-            _ => bech32::Variant::Bech32m,
-        }
-    }
-}
-
-impl From<WitnessVersion> for ::bech32::u5 {
-    /// Converts [`WitnessVersion`] instance into corresponding Bech32(m) u5-value ([`bech32::u5`]).
-    fn from(version: WitnessVersion) -> Self {
-        ::bech32::u5::try_from_u8(version.into_num()).expect("WitnessVersion must be 0..=16")
-    }
-}
-
-impl From<WitnessVersion> for opcodes::All {
-    /// Converts [`WitnessVersion`] instance into corresponding Dash scriptopcode (`OP_0`..`OP_16`).
-    fn from(version: WitnessVersion) -> opcodes::All {
-        match version {
-            WitnessVersion::V0 => opcodes::all::OP_PUSHBYTES_0,
-            no => opcodes::All::from(opcodes::all::OP_PUSHNUM_1.into_u8() + no.into_num() - 1)
-        }
-    }
-}
-
-/// The method used to produce an address.
-#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub enum Payload {
-    /// P2PKH address.
-    PubkeyHash(PubkeyHash),
-    /// P2SH address.
-    ScriptHash(ScriptHash),
-    /// Segwit address.
-    WitnessProgram {
-        /// The witness program version.
-        version: WitnessVersion,
-        /// The witness program.
-        program: Vec<u8>,
-    },
-}
-
-impl Payload {
-    /// Constructs a [Payload] from an output script (`scriptPubkey`).
-    pub fn from_script(script: &script::Script) -> Option<Payload> {
-        Some(if script.is_p2pkh() {
-            let mut hash_inner = [0u8; 20];
-            hash_inner.copy_from_slice(&script.as_bytes()[3..23]);
-            Payload::PubkeyHash(PubkeyHash::from_inner(hash_inner))
-        } else if script.is_p2sh() {
-            let mut hash_inner = [0u8; 20];
-            hash_inner.copy_from_slice(&script.as_bytes()[2..22]);
-            Payload::ScriptHash(ScriptHash::from_inner(hash_inner))
-        } else if script.is_witness_program() {
-            Payload::WitnessProgram {
-                version: WitnessVersion::from_opcode(opcodes::All::from(script[0])).ok()?,
-                program: script[2..].to_vec(),
-            }
-        } else {
-            return None;
-        })
-    }
-
-    /// Generates a script pubkey spending to this [Payload].
-    pub fn script_pubkey(&self) -> script::Script {
-        match *self {
-            Payload::PubkeyHash(ref hash) => script::Script::new_p2pkh(hash),
-            Payload::ScriptHash(ref hash) => script::Script::new_p2sh(hash),
-            Payload::WitnessProgram { version, program: ref prog } => {
-                script::Script::new_witness_program(version, prog)
-            }
-        }
-    }
-
-    /// Creates a pay to (compressed) public key hash payload from a public key
-    #[inline]
-    pub fn p2pkh(pk: &PublicKey) -> Payload {
-        Payload::PubkeyHash(pk.pubkey_hash())
-    }
-
-    /// Creates a pay to script hash P2SH payload from a script
-    #[inline]
-    pub fn p2sh(script: &script::Script) -> Result<Payload, Error> {
-        if script.len() > MAX_SCRIPT_ELEMENT_SIZE {
-            return Err(Error::ExcessiveScriptSize);
-        }
-        Ok(Payload::ScriptHash(script.script_hash()))
-    }
-
-    /// Create a witness pay to public key payload from a public key
-    pub fn p2wpkh(pk: &PublicKey) -> Result<Payload, Error> {
-        Ok(Payload::WitnessProgram {
-            version: WitnessVersion::V0,
-            program: pk.wpubkey_hash().ok_or(Error::UncompressedPubkey)?.to_vec(),
-        })
-    }
-
-    /// Create a pay to script payload that embeds a witness pay to public key
-    pub fn p2shwpkh(pk: &PublicKey) -> Result<Payload, Error> {
-        let builder = script::Builder::new()
-            .push_int(0)
-            .push_slice(&pk.wpubkey_hash().ok_or(Error::UncompressedPubkey)?);
-
-        Ok(Payload::ScriptHash(builder.into_script().script_hash()))
-    }
-
-    /// Create a witness pay to script hash payload.
-    pub fn p2wsh(script: &script::Script) -> Payload {
-        Payload::WitnessProgram {
-            version: WitnessVersion::V0,
-            program: script.wscript_hash().to_vec(),
-        }
-    }
-
-    /// Create a pay to script payload that embeds a witness pay to script hash address
-    pub fn p2shwsh(script: &script::Script) -> Payload {
-        let ws = script::Builder::new()
-            .push_int(0)
-            .push_slice(&script.wscript_hash())
-            .into_script();
-
-        Payload::ScriptHash(ws.script_hash())
-    }
-
-    /// Create a pay to taproot payload from untweaked key
-    pub fn p2tr<C: Verification>(
-        secp: &Secp256k1<C>,
-        internal_key: UntweakedPublicKey,
-        merkle_root: Option<TapBranchHash>,
-    ) -> Payload {
-        let (output_key, _parity) = internal_key.tap_tweak(secp, merkle_root);
-        Payload::WitnessProgram {
-            version: WitnessVersion::V1,
-            program: output_key.to_inner().serialize().to_vec(),
-        }
-    }
-
-    /// Create a pay to taproot payload from a pre-tweaked output key.
-    ///
-    /// This method is not recommended for use and [Payload::p2tr()] should be used where possible.
-    pub fn p2tr_tweaked(output_key: TweakedPublicKey) -> Payload {
-        Payload::WitnessProgram {
-            version: WitnessVersion::V1,
-            program: output_key.as_inner().serialize().to_vec(),
-        }
-    }
-}
-
-/// A utility struct to encode an address payload with the given parameters.
-/// This is a low-level utility struct. Consider using `Address` instead.
-pub struct AddressEncoding<'a> {
-    /// The address payload to encode.
-    pub payload: &'a Payload,
-    /// base58 version byte for p2pkh payloads (e.g. 0x00 for "1..." addresses).
-    pub p2pkh_prefix: u8,
-    /// base58 version byte for p2sh payloads (e.g. 0x05 for "3..." addresses).
-    pub p2sh_prefix: u8,
-    /// hrp used in bech32 addresss (e.g. "bc" for "bc1..." addresses).
-    pub bech32_hrp: &'a str,
-}
-
-impl<'a> fmt::Display for AddressEncoding<'a> {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        match self.payload {
-            Payload::PubkeyHash(hash) => {
-                let mut prefixed = [0; 21];
-                prefixed[0] = self.p2pkh_prefix;
-                prefixed[1..].copy_from_slice(&hash[..]);
-                base58::check_encode_slice_to_fmt(fmt, &prefixed[..])
-            }
-            Payload::ScriptHash(hash) => {
-                let mut prefixed = [0; 21];
-                prefixed[0] = self.p2sh_prefix;
-                prefixed[1..].copy_from_slice(&hash[..]);
-                base58::check_encode_slice_to_fmt(fmt, &prefixed[..])
-            }
-            Payload::WitnessProgram {
-                version,
-                program: prog,
-            } => {
-                let mut upper_writer;
-                let writer = if fmt.alternate() {
-                    upper_writer = UpperWriter(fmt);
-                    &mut upper_writer as &mut dyn fmt::Write
-                } else {
-                    fmt as &mut dyn fmt::Write
-                };
-                let mut bech32_writer =
-                    bech32::Bech32Writer::new(self.bech32_hrp, version.bech32_variant(), writer)?;
-                bech32::WriteBase32::write_u5(&mut bech32_writer, (*version).into())?;
-                bech32::ToBase32::write_base32(&prog, &mut bech32_writer)
-            }
-        }
-    }
-}
-
-/// A Dash address.
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub struct Address {
-    /// The type of the address.
-    pub payload: Payload,
-    /// The network on which this address is usable.
-    pub network: Network,
-}
-serde_string_impl!(Address, "a Dash address");
-
-impl Address {
-    /// Creates a pay to (compressed) public key hash address from a public key.
-    ///
-    /// This is the preferred non-witness type address.
-    #[inline]
-    pub fn p2pkh(pk: &PublicKey, network: Network) -> Address {
-        Address {
-            network,
-            payload: Payload::p2pkh(pk),
-        }
-    }
-
-    /// Creates a pay to script hash P2SH address from a script.
-    ///
-    /// This address type was introduced with BIP16 and is the popular type to implement multi-sig
-    /// these days.
-    #[inline]
-    pub fn p2sh(script: &script::Script, network: Network) -> Result<Address, Error> {
-        Ok(Address {
-            network,
-            payload: Payload::p2sh(script)?,
-        })
-    }
-
-    /// Creates a witness pay to public key address from a public key.
-    ///
-    /// This is the native segwit address type for an output redeemable with a single signature.
-    ///
-    /// # Errors
-    /// Will only return an error if an uncompressed public key is provided.
-    pub fn p2wpkh(pk: &PublicKey, network: Network) -> Result<Address, Error> {
-        Ok(Address {
-            network,
-            payload: Payload::p2wpkh(pk)?,
-        })
-    }
-
-    /// Creates a pay to script address that embeds a witness pay to public key.
-    ///
-    /// This is a segwit address type that looks familiar (as p2sh) to legacy clients.
-    ///
-    /// # Errors
-    /// Will only return an Error if an uncompressed public key is provided.
-    pub fn p2shwpkh(pk: &PublicKey, network: Network) -> Result<Address, Error> {
-        Ok(Address {
-            network,
-            payload: Payload::p2shwpkh(pk)?,
-        })
-    }
-
-    /// Creates a witness pay to script hash address.
-    pub fn p2wsh(script: &script::Script, network: Network) -> Address {
-        Address {
-            network,
-            payload: Payload::p2wsh(script),
-        }
-    }
-
-    /// Creates a pay to script address that embeds a witness pay to script hash address.
-    ///
-    /// This is a segwit address type that looks familiar (as p2sh) to legacy clients.
-    pub fn p2shwsh(script: &script::Script, network: Network) -> Address {
-        Address {
-            network,
-            payload: Payload::p2shwsh(script),
-        }
-    }
-
-    /// Creates a pay to taproot address from an untweaked key.
-    pub fn p2tr<C: Verification>(
-        secp: &Secp256k1<C>,
-        internal_key: UntweakedPublicKey,
-        merkle_root: Option<TapBranchHash>,
-        network: Network
-    ) -> Address {
-        Address {
-            network: network,
-            payload: Payload::p2tr(secp, internal_key, merkle_root),
-        }
-    }
-
-    /// Creates a pay to taproot address from a pre-tweaked output key.
-    ///
-    /// This method is not recommended for use, [`Address::p2tr()`] should be used where possible.
-    pub fn p2tr_tweaked(output_key: TweakedPublicKey, network: Network) -> Address {
-        Address {
-            network,
-            payload: Payload::p2tr_tweaked(output_key),
-        }
-    }
-
-    /// Gets the address type of the address.
-    ///
-    /// # Returns
-    /// None if unknown, non-standard or related to the future witness version.
-    pub fn address_type(&self) -> Option<AddressType> {
-        match self.payload {
-            Payload::PubkeyHash(_) => Some(AddressType::P2pkh),
-            Payload::ScriptHash(_) => Some(AddressType::P2sh),
-            Payload::WitnessProgram {
-                version,
-                program: ref prog,
-            } => {
-                // BIP-141 p2wpkh or p2wsh addresses.
-                match version {
-                    WitnessVersion::V0 => match prog.len() {
-                        20 => Some(AddressType::P2wpkh),
-                        32 => Some(AddressType::P2wsh),
-                        _ => None,
-                    },
-                    WitnessVersion::V1 if prog.len() == 32 => Some(AddressType::P2tr),
-                    _ => None,
-                }
-            }
-        }
-    }
-
-    /// Checks whether or not the address is following Dash standardness rules.
-    ///
-    /// SegWit addresses with unassigned witness versions or non-standard program sizes are
-    /// considered non-standard.
-    pub fn is_standard(&self) -> bool {
-        self.address_type().is_some()
-    }
-
-    /// Constructs an [`Address`] from an output script (`scriptPubkey`).
-    pub fn from_script(script: &script::Script, network: Network) -> Option<Address> {
-        Some(Address {
-            payload: Payload::from_script(script)?,
-            network,
-        })
-    }
-
-    /// Generates a script pubkey spending to this address.
-    pub fn script_pubkey(&self) -> script::Script {
-        self.payload.script_pubkey()
-    }
-
-    /// Creates a URI string *Dash:address* optimized to be encoded in QR codes.
-    ///
-    /// If the address is bech32, both the schema and the address become uppercase.
-    /// If the address is base58, the schema is lowercase and the address is left mixed case.
-    ///
-    /// Quoting BIP 173 "inside QR codes uppercase SHOULD be used, as those permit the use of
-    /// alphanumeric mode, which is 45% more compact than the normal byte mode."
-    pub fn to_qr_uri(&self) -> String {
-        let schema = match self.payload {
-            Payload::WitnessProgram { .. } => "Dash",
-            _ => "Dash",
-        };
-        format!("{}:{:#}", schema, self)
-    }
-
-    /// Parsed addresses do not always have *one* network. The problem is that legacy testnet,
-    /// regtest and devnet addresses use the same prefix instead of multiple different ones. When
-    /// parsing, such addresses are always assumed to be testnet addresses (the same is true for
-    /// bech32 devnet addresses). So if one wants to check if an address belongs to a certain
-    /// network a simple comparison is not enough anymore. Instead this function can be used.
-    ///
-    /// ```rust
-    /// use dashcore::{Address, Network};
-    ///
-    /// let address: Address = "yWZBnVvSxS5xSq27dHVAJpuqbt7vvwGFL1".parse().unwrap();
-    /// assert!(address.is_valid_for_network(Network::Testnet));
-    /// assert!(address.is_valid_for_network(Network::Regtest));
-    /// assert!(address.is_valid_for_network(Network::Devnet));
-    ///
-    /// assert_eq!(address.is_valid_for_network(Network::Dash), false);
-    ///
-    /// let address: Address = "Xci5rLWMqdQDy5uaCDVWEcTi6sfnkmqdUz".parse().unwrap();
-    /// assert!(address.is_valid_for_network(Network::Dash));
-    /// assert_eq!(address.is_valid_for_network(Network::Testnet), false);
-    /// ```
-    pub fn is_valid_for_network(&self, network: Network) -> bool {
-        let is_legacy = match self.address_type() {
-            Some(AddressType::P2pkh) | Some(AddressType::P2sh) => true,
-            _ => false
-        };
-
-        match (self.network, network) {
-            (a, b) if a == b => true,
-            (Network::Dash, _) | (_, Network::Dash) => false,
-            (Network::Regtest, _) | (_, Network::Regtest) if !is_legacy => false,
-            (Network::Testnet, _) | (Network::Regtest, _) | (Network::Devnet, _) => true
-        }
-    }
-
-    /// Returns true if the given pubkey is directly related to the address payload.
-    ///
-    /// This is determined by directly comparing the address payload with either the
-    /// hash of the given public key or the segwit redeem hash generated from the
-    /// given key. For taproot addresses, the supplied key is assumed to be tweaked
-    pub fn is_related_to_pubkey(&self, pubkey: &PublicKey) -> bool {
-        let pubkey_hash = pubkey.pubkey_hash();
-        let payload = self.payload_as_bytes();
-        let xonly_pubkey = XOnlyPublicKey::from(pubkey.inner);
-
-        (*pubkey_hash == *payload) || (xonly_pubkey.serialize() == *payload) || (*segwit_redeem_hash(&pubkey_hash) == *payload)
-    }
-
-    /// Returns true if the supplied xonly public key can be used to derive the address.
-    ///
-    /// This will only work for Taproot addresses. The Public Key is
-    /// assumed to have already been tweaked.
-    pub fn is_related_to_xonly_pubkey(&self, xonly_pubkey: &XOnlyPublicKey) -> bool {
-        let payload = self.payload_as_bytes();
-        payload == xonly_pubkey.serialize()
-    }
-
-    /// Return the address payload as a byte slice
-    fn payload_as_bytes(&self) -> &[u8] {
-        match &self.payload {
-            Payload::ScriptHash(hash) => hash,
-            Payload::PubkeyHash(hash) => hash,
-            Payload::WitnessProgram { program, .. } => program,
-        }
-    }
-}
-
-// Alternate formatting `{:#}` is used to return uppercase version of bech32 addresses which should
-// be used in QR codes, see [`Address::to_qr_uri`].
-impl fmt::Display for Address {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        let p2pkh_prefix = match self.network {
-            Network::Dash => PUBKEY_ADDRESS_PREFIX_MAIN,
-            Network::Testnet | Network::Devnet | Network::Regtest => PUBKEY_ADDRESS_PREFIX_TEST,
-        };
-        let p2sh_prefix = match self.network {
-            Network::Dash => SCRIPT_ADDRESS_PREFIX_MAIN,
-            Network::Testnet | Network::Devnet | Network::Regtest => SCRIPT_ADDRESS_PREFIX_TEST,
-        };
-        let bech32_hrp = match self.network {
-            Network::Dash => "ds",
-            Network::Testnet | Network::Devnet => "td",
-            Network::Regtest => "dsrt",
-        };
-        let encoding = AddressEncoding {
-            payload: &self.payload,
-            p2pkh_prefix,
-            p2sh_prefix,
-            bech32_hrp,
-        };
-        encoding.fmt(fmt)
-    }
-}
-
-struct UpperWriter<W: fmt::Write>(W);
-
-impl<W: fmt::Write> fmt::Write for UpperWriter<W> {
-    fn write_str(&mut self, s: &str) -> fmt::Result {
-        for c in s.chars() {
-            self.0.write_char(c.to_ascii_uppercase())?;
-        }
-        Ok(())
-    }
-}
-
-/// Extracts the bech32 prefix.
-///
-/// # Returns
-/// The input slice if no prefix is found.
-fn find_bech32_prefix(bech32: &str) -> &str {
-    // Split at the last occurrence of the separator character '1'.
-    match bech32.rfind('1') {
-        None => bech32,
-        Some(sep) => bech32.split_at(sep).0,
-    }
-}
-
-impl FromStr for Address {
-    type Err = Error;
-
-    fn from_str(s: &str) -> Result<Address, Error> {
-        // try bech32
-        let bech32_network = match find_bech32_prefix(s) {
-            // note that upper or lowercase is allowed but NOT mixed case
-            "ds" | "DS" => Some(Network::Dash),
-            "td" | "TD" => Some(Network::Testnet), // this may also be a devnet
-            "dsrt" | "DSRT" => Some(Network::Regtest),
-            _ => None,
-        };
-        if let Some(network) = bech32_network {
-            // decode as bech32
-            let (_, payload, variant) = bech32::decode(s)?;
-            if payload.is_empty() {
-                return Err(Error::EmptyBech32Payload);
-            }
-
-            // Get the script version and program (converted from 5-bit to 8-bit)
-            let (version, program): (WitnessVersion, Vec<u8>) = {
-                let (v, p5) = payload.split_at(1);
-                (WitnessVersion::from_u5(v[0])?, bech32::FromBase32::from_base32(p5)?)
-            };
-
-            if program.len() < 2 || program.len() > 40 {
-                return Err(Error::InvalidWitnessProgramLength(program.len()));
-            }
-
-            // Specific segwit v0 check.
-            if version == WitnessVersion::V0 && (program.len() != 20 && program.len() != 32) {
-                return Err(Error::InvalidSegwitV0ProgramLength(program.len()));
-            }
-
-            // Encoding check
-            let expected = version.bech32_variant();
-            if expected != variant {
-                return Err(Error::InvalidBech32Variant { expected, found: variant });
-            }
-
-            return Ok(Address {
-                payload: Payload::WitnessProgram {
-                    version,
-                    program,
-                },
-                network,
-            });
-        }
-
-        // Base58
-        if s.len() > 50 {
-            return Err(Error::Base58(base58::Error::InvalidLength(s.len() * 11 / 15)));
-        }
-        let data = base58::from_check(s)?;
-        if data.len() != 21 {
-            return Err(Error::Base58(base58::Error::InvalidLength(data.len())));
-        }
-
-        let (network, payload) = match data[0] {
-            PUBKEY_ADDRESS_PREFIX_MAIN => (
-                Network::Dash,
-                Payload::PubkeyHash(PubkeyHash::from_slice(&data[1..]).unwrap()),
-            ),
-            SCRIPT_ADDRESS_PREFIX_MAIN => (
-                Network::Dash,
-                Payload::ScriptHash(ScriptHash::from_slice(&data[1..]).unwrap()),
-            ),
-            PUBKEY_ADDRESS_PREFIX_TEST => (
-                Network::Testnet,
-                Payload::PubkeyHash(PubkeyHash::from_slice(&data[1..]).unwrap()),
-            ),
-            SCRIPT_ADDRESS_PREFIX_TEST => (
-                Network::Testnet,
-                Payload::ScriptHash(ScriptHash::from_slice(&data[1..]).unwrap()),
-            ),
-            x => return Err(Error::Base58(base58::Error::InvalidAddressVersion(x))),
-        };
-
-        Ok(Address {
-            network,
-            payload,
-        })
-    }
-}
-
-impl fmt::Debug for Address {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Display::fmt(self, f)
-    }
-}
-
-/// Convert a byte array of a pubkey hash into a segwit redeem hash
-fn segwit_redeem_hash(pubkey_hash: &[u8]) -> ::hashes::hash160::Hash {
-    let mut sha_engine = sha256::Hash::engine();
-    sha_engine.input(&[0, 20]);
-    sha_engine.input(pubkey_hash);
-    ::hashes::hash160::Hash::from_engine(sha_engine)
-}
-
-#[cfg(test)]
-mod tests {
-    use core::str::FromStr;
-
-    use hashes::hex::{FromHex, ToHex};
-
-    use blockdata::script::Script;
-    use network::constants::Network::{Dash, Testnet};
-    use util::key::PublicKey;
-    use secp256k1::XOnlyPublicKey;
-
-    use super::*;
-
-    macro_rules! hex (($hex:expr) => (Vec::from_hex($hex).unwrap()));
-    macro_rules! hex_key (($hex:expr) => (PublicKey::from_slice(&hex!($hex)).unwrap()));
-    macro_rules! hex_script (($hex:expr) => (Script::from(hex!($hex))));
-    macro_rules! hex_pubkeyhash (($hex:expr) => (PubkeyHash::from_hex(&$hex).unwrap()));
-    macro_rules! hex_scripthash (($hex:expr) => (ScriptHash::from_hex($hex).unwrap()));
-
-    fn roundtrips(addr: &Address) {
-        assert_eq!(
-            Address::from_str(&addr.to_string()).unwrap(),
-            *addr,
-            "string round-trip failed for {}",
-            addr,
-        );
-        assert_eq!(
-            Address::from_script(&addr.script_pubkey(), addr.network).as_ref(),
-            Some(addr),
-            "script round-trip failed for {}",
-            addr,
-        );
-        //TODO: add serde roundtrip after no-strason PR
-    }
-
-    #[test]
-    fn test_p2pkh_address_58() {
-        let addr = Address {
-            network: Dash,
-            payload: Payload::PubkeyHash(hex_pubkeyhash!("162c5ea71c0b23f5b9022ef047c4a86470a5b070")),
-        };
-
-        assert_eq!(
-            addr.script_pubkey(),
-            hex_script!("76a914162c5ea71c0b23f5b9022ef047c4a86470a5b07088ac")
-        );
-        assert_eq!(&addr.to_string(), "Xci5rLWMqdQDy5uaCDVWEcTi6sfnkmqdUz");
-        assert_eq!(addr.address_type(), Some(AddressType::P2pkh));
-        roundtrips(&addr);
-    }
-
-    #[test]
-    fn test_p2pkh_from_key() {
-        let key = hex_key!("048d5141948c1702e8c95f438815794b87f706a8d4cd2bffad1dc1570971032c9b6042a0431ded2478b5c9cf2d81c124a5e57347a3c63ef0e7716cf54d613ba183");
-        let addr = Address::p2pkh(&key, Dash);
-        assert_eq!(&addr.to_string(), "XyzL4FHjYiiQk9uhm6yCM4ewbkboBggYyo");
-
-        let key = hex_key!(&"03df154ebfcf29d29cc10d5c2565018bce2d9edbab267c31d2caf44a63056cf99f");
-        let addr = Address::p2pkh(&key, Testnet);
-        assert_eq!(&addr.to_string(), "yWZBnVvSxS5xSq27dHVAJpuqbt7vvwGFL1");
-        assert_eq!(addr.address_type(), Some(AddressType::P2pkh));
-        roundtrips(&addr);
-    }
-
-    #[test]
-    fn test_p2sh_address_58() {
-        let addr = Address {
-            network: Dash,
-            payload: Payload::ScriptHash(hex_scripthash!("162c5ea71c0b23f5b9022ef047c4a86470a5b070")),
-        };
-
-        assert_eq!(
-            addr.script_pubkey(),
-            hex_script!("a914162c5ea71c0b23f5b9022ef047c4a86470a5b07087")
-        );
-        assert_eq!(&addr.to_string(), "7URtmpd5Eobeu5YNj3WP968WLcDC86Kko6");
-        assert_eq!(addr.address_type(), Some(AddressType::P2sh));
-        roundtrips(&addr);
-    }
-
-    #[test]
-    fn test_p2sh_parse() {
-        let script = hex_script!("552103a765fc35b3f210b95223846b36ef62a4e53e34e2925270c2c7906b92c9f718eb2103c327511374246759ec8d0b89fa6c6b23b33e11f92c5bc155409d86de0c79180121038cae7406af1f12f4786d820a1466eec7bc5785a1b5e4a387eca6d797753ef6db2103252bfb9dcaab0cd00353f2ac328954d791270203d66c2be8b430f115f451b8a12103e79412d42372c55dd336f2eb6eb639ef9d74a22041ba79382c74da2338fe58ad21035049459a4ebc00e876a9eef02e72a3e70202d3d1f591fc0dd542f93f642021f82102016f682920d9723c61b27f562eb530c926c00106004798b6471e8c52c60ee02057ae");
-        let addr = Address::p2sh(&script, Testnet).unwrap();
-        assert_eq!(&addr.to_string(), "8qAmTPBdngNnZ1HoYDMjRWL4JYoF4Kdah4");
-        assert_eq!(addr.address_type(), Some(AddressType::P2sh));
-        roundtrips(&addr);
-    }
-
-    #[test]
-    fn test_p2sh_parse_for_large_script(){
-        let script = hex_script!("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");
-        assert_eq!(Address::p2sh(&script, Testnet), Err(Error::ExcessiveScriptSize));
-    }
-
-    #[ignore]
-    #[test]
-    fn test_p2wpkh() {
-        // stolen from Dash transaction: b3c8c2b6cfc335abbcb2c7823a8453f55d64b2b5125a9a61e8737230cdb8ce20
-        let mut key = hex_key!("033bc8c83c52df5712229a2f72206d90192366c36428cb0c12b6af98324d97bfbc");
-        let addr = Address::p2wpkh(&key, Dash).unwrap();
-        assert_eq!(&addr.to_string(), "bc1qvzvkjn4q3nszqxrv3nraga2r822xjty3ykvkuw");
-        assert_eq!(addr.address_type(), Some(AddressType::P2wpkh));
-        roundtrips(&addr);
-
-        // Test uncompressed pubkey
-        key.compressed = false;
-        assert_eq!(Address::p2wpkh(&key, Dash), Err(Error::UncompressedPubkey));
-    }
-
-    #[ignore]
-    #[test]
-    fn test_p2wsh() {
-        // stolen from Dash transaction 5df912fda4becb1c29e928bec8d64d93e9ba8efa9b5b405bd683c86fd2c65667
-        let script = hex_script!("52210375e00eb72e29da82b89367947f29ef34afb75e8654f6ea368e0acdfd92976b7c2103a1b26313f430c4b15bb1fdce663207659d8cac749a0e53d70eff01874496feff2103c96d495bfdd5ba4145e3e046fee45e84a8a48ad05bd8dbb395c011a32cf9f88053ae");
-        let addr = Address::p2wsh(&script, Dash);
-        assert_eq!(
-            &addr.to_string(),
-            "bc1qwqdg6squsna38e46795at95yu9atm8azzmyvckulcc7kytlcckxswvvzej"
-        );
-        assert_eq!(addr.address_type(), Some(AddressType::P2wsh));
-        roundtrips(&addr);
-    }
-
-    #[test]
-    fn test_p2shwpkh() {
-        let mut key = hex_key!("026c468be64d22761c30cd2f12cbc7de255d592d7904b1bab07236897cc4c2e766");
-        let addr = Address::p2shwpkh(&key, Dash).unwrap();
-        assert_eq!(&addr.to_string(), "7pu4bhf1eANQdvBoPH2FcDtDpMu4c7ZNuN");
-        assert_eq!(addr.address_type(), Some(AddressType::P2sh));
-        roundtrips(&addr);
-
-        // Test uncompressed pubkey
-        key.compressed = false;
-        assert_eq!(Address::p2wpkh(&key, Dash), Err(Error::UncompressedPubkey));
-    }
-
-    #[test]
-    fn test_p2shwsh() {
-        // stolen from Dash transaction f9ee2be4df05041d0e0a35d7caa3157495ca4f93b233234c9967b6901dacf7a9
-        let script = hex_script!("522103e5529d8eaa3d559903adb2e881eb06c86ac2574ffa503c45f4e942e2a693b33e2102e5f10fcdcdbab211e0af6a481f5532536ec61a5fdbf7183770cf8680fe729d8152ae");
-        let addr = Address::p2shwsh(&script, Dash);
-        assert_eq!(&addr.to_string(), "7WxUWa53KVEhSdBWwoB7LYMr2VedMZqoqt");
-        assert_eq!(addr.address_type(), Some(AddressType::P2sh));
-        roundtrips(&addr);
-    }
-
-    #[test]
-    fn test_non_existent_segwit_version() {
-        // 40-byte program
-        let program = hex!(
-            "654f6ea368e0acdfd92976b7c2103a1b26313f430654f6ea368e0acdfd92976b7c2103a1b26313f4"
-        );
-        let addr = Address {
-            payload: Payload::WitnessProgram {
-                version: WitnessVersion::V13,
-                program: program,
-            },
-            network: Network::Dash,
-        };
-        roundtrips(&addr);
-    }
-
-    #[test]
-    fn test_address_type() {
-        let addresses = [
-            ("XmzfivrzYQ7B7oBMZKwPRdhjB1iNvX71XZ", Some(AddressType::P2pkh)),
-            ("7onv7GQcmoxJHdeDzTq2FGD9Q8Do9bxuFD", Some(AddressType::P2sh)),
-        ];
-        for (address, expected_type) in &addresses {
-            let addr = Address::from_str(&address).unwrap();
-            assert_eq!(&addr.address_type(), expected_type);
-        }
-    }
-
-    #[ignore]
-    #[test]
-    fn test_segwit_taproot_address_type() {
-        let addresses = [
-            ("bc1qvzvkjn4q3nszqxrv3nraga2r822xjty3ykvkuw", Some(AddressType::P2wpkh)),
-            ("bc1qwqdg6squsna38e46795at95yu9atm8azzmyvckulcc7kytlcckxswvvzej", Some(AddressType::P2wsh)),
-            ("bc1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqkedrcr", Some(AddressType::P2tr)),
-            // Related to future extensions, addresses are valid but have no type
-            // segwit v1 and len != 32
-            ("bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7kt5nd6y", None),
-            // segwit v2
-            ("bc1zw508d6qejxtdg4y5r3zarvaryvaxxpcs", None),
-        ];
-        for (address, expected_type) in &addresses {
-            let addr = Address::from_str(&address).unwrap();
-            assert_eq!(&addr.address_type(), expected_type);
-        }
-    }
-
-    #[ignore]
-    #[test]
-    fn test_bip173_350_vectors() {
-        // Test vectors valid under both BIP-173 and BIP-350
-        let valid_vectors = [
-            ("BC1QW508D6QEJXTDG4Y5R3ZARVARY0C5XW7KV8F3T4", "0014751e76e8199196d454941c45d1b3a323f1433bd6"),
-            ("tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sl5k7", "00201863143c14c5166804bd19203356da136c985678cd4d27a1b8c6329604903262"),
-            ("bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7kt5nd6y", "5128751e76e8199196d454941c45d1b3a323f1433bd6751e76e8199196d454941c45d1b3a323f1433bd6"),
-            ("BC1SW50QGDZ25J", "6002751e"),
-            ("bc1zw508d6qejxtdg4y5r3zarvaryvaxxpcs", "5210751e76e8199196d454941c45d1b3a323"),
-            ("tb1qqqqqp399et2xygdj5xreqhjjvcmzhxw4aywxecjdzew6hylgvsesrxh6hy", "0020000000c4a5cad46221b2a187905e5266362b99d5e91c6ce24d165dab93e86433"),
-            ("tb1pqqqqp399et2xygdj5xreqhjjvcmzhxw4aywxecjdzew6hylgvsesf3hn0c", "5120000000c4a5cad46221b2a187905e5266362b99d5e91c6ce24d165dab93e86433"),
-            ("bc1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vqzk5jj0", "512079be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798")
-        ];
-        for vector in &valid_vectors {
-            let addr: Address = vector.0.parse().unwrap();
-            assert_eq!(&addr.script_pubkey().as_bytes().to_hex(), vector.1);
-            roundtrips(&addr);
-        }
-
-        let invalid_vectors = [
-            // 1. BIP-350 test vectors
-            // Invalid human-readable part
-            "tc1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vq5zuyut",
-            // Invalid checksums (Bech32 instead of Bech32m):
-            "bc1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vqh2y7hd",
-            "tb1z0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vqglt7rf",
-            "BC1S0XLXVLHEMJA6C4DQV22UAPCTQUPFHLXM9H8Z3K2E72Q4K9HCZ7VQ54WELL",
-            "bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kemeawh",
-            "tb1q0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vq24jc47",
-            // Invalid character in checksum
-            "bc1p38j9r5y49hruaue7wxjce0updqjuyyx0kh56v8s25huc6995vvpql3jow4",
-            // Invalid witness version
-            "BC130XLXVLHEMJA6C4DQV22UAPCTQUPFHLXM9H8Z3K2E72Q4K9HCZ7VQ7ZWS8R",
-            // Invalid program length (1 byte)
-            "bc1pw5dgrnzv",
-            // Invalid program length (41 bytes)
-            "bc1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7v8n0nx0muaewav253zgeav",
-            // Invalid program length for witness version 0 (per BIP141)
-            "BC1QR508D6QEJXTDG4Y5R3ZARVARYV98GJ9P",
-            // Mixed case
-            "tb1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vq47Zagq",
-            // zero padding of more than 4 bits
-            "bc1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7v07qwwzcrf",
-            // Non-zero padding in 8-to-5 conversion
-            "tb1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vpggkg4j",
-            // Empty data section
-            "bc1gmk9yu",
-
-            // 2. BIP-173 test vectors
-            // Invalid human-readable part
-            "tc1qw508d6qejxtdg4y5r3zarvary0c5xw7kg3g4ty",
-            // Invalid checksum
-            "bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t5",
-            // Invalid witness version
-            "BC13W508D6QEJXTDG4Y5R3ZARVARY0C5XW7KN40WF2",
-            // Invalid program length
-            "bc1rw5uspcuh",
-            // Invalid program length
-            "bc10w508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7kw5rljs90",
-            // Invalid program length for witness version 0 (per BIP141)
-            "BC1QR508D6QEJXTDG4Y5R3ZARVARYV98GJ9P",
-            // Mixed case
-            "tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sL5k7",
-            // zero padding of more than 4 bits
-            "bc1zw508d6qejxtdg4y5r3zarvaryvqyzf3du",
-            // Non-zero padding in 8-to-5 conversion
-            "tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3pjxtptv",
-            // Final test for empty data section is the same as above in BIP-350
-
-            // 3. BIP-173 valid test vectors obsolete by BIP-350
-            "bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7k7grplx",
-            "BC1SW50QA3JX3S",
-            "bc1zw508d6qejxtdg4y5r3zarvaryvg6kdaj",
-        ];
-        for vector in &invalid_vectors {
-            assert!(vector.parse::<Address>().is_err());
-        }
-    }
-
-    #[test]
-    #[cfg(feature = "serde")]
-    #[ignore="TODO: adjust tests for dash addr"]
-    fn test_json_serialize() {
-        use serde_json;
-
-        let addr = Address::from_str("132F25rTsvBdp9JzLLBHP5mvGY66i1xdiM").unwrap();
-        let json = serde_json::to_value(&addr).unwrap();
-        assert_eq!(
-            json,
-            serde_json::Value::String("132F25rTsvBdp9JzLLBHP5mvGY66i1xdiM".to_owned())
-        );
-        let into: Address = serde_json::from_value(json).unwrap();
-        assert_eq!(addr.to_string(), into.to_string());
-        assert_eq!(
-            into.script_pubkey(),
-            hex_script!("76a914162c5ea71c0b23f5b9022ef047c4a86470a5b07088ac")
-        );
-
-        let addr = Address::from_str("33iFwdLuRpW1uK1RTRqsoi8rR4NpDzk66k").unwrap();
-        let json = serde_json::to_value(&addr).unwrap();
-        assert_eq!(
-            json,
-            serde_json::Value::String("33iFwdLuRpW1uK1RTRqsoi8rR4NpDzk66k".to_owned())
-        );
-        let into: Address = serde_json::from_value(json).unwrap();
-        assert_eq!(addr.to_string(), into.to_string());
-        assert_eq!(
-            into.script_pubkey(),
-            hex_script!("a914162c5ea71c0b23f5b9022ef047c4a86470a5b07087")
-        );
-
-        let addr =
-            Address::from_str("tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sl5k7")
-                .unwrap();
-        let json = serde_json::to_value(&addr).unwrap();
-        assert_eq!(
-            json,
-            serde_json::Value::String(
-                "tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sl5k7".to_owned()
-            )
-        );
-        let into: Address = serde_json::from_value(json).unwrap();
-        assert_eq!(addr.to_string(), into.to_string());
-        assert_eq!(
-            into.script_pubkey(),
-            hex_script!("00201863143c14c5166804bd19203356da136c985678cd4d27a1b8c6329604903262")
-        );
-
-        let addr = Address::from_str("bcrt1q2nfxmhd4n3c8834pj72xagvyr9gl57n5r94fsl").unwrap();
-        let json = serde_json::to_value(&addr).unwrap();
-        assert_eq!(
-            json,
-            serde_json::Value::String("bcrt1q2nfxmhd4n3c8834pj72xagvyr9gl57n5r94fsl".to_owned())
-        );
-        let into: Address = serde_json::from_value(json).unwrap();
-        assert_eq!(addr.to_string(), into.to_string());
-        assert_eq!(
-            into.script_pubkey(),
-            hex_script!("001454d26dddb59c7073c6a197946ea1841951fa7a74")
-        );
-    }
-
-    #[test]
-    fn test_qr_string() {
-        for el in  ["XdLDdeFJgVR3YeoVM55jrfFtUMzMNaEFF8", "7fH3aFXJ5TWv5eNScx7m4FCf3XD27mXYHq"].iter() {
-            let addr = Address::from_str(el).unwrap();
-            assert_eq!(addr.to_qr_uri(), format!("Dash:{}", el));
-        }
-
-        // for el in ["dsrt1q2nfxmhd4n3c8834pj72xagvyr9gl57n5r94fsl", "ds1qwqdg6squsna38e46795at95yu9atm8azzmyvckulcc7kytlcckxswvvzej"].iter() {
-        //     let addr = Address::from_str(el).unwrap();
-        //     assert_eq!(addr.to_qr_uri(), format!("Dash:{}", el.to_ascii_uppercase()) );
-        // }
-    }
-
-    #[test]
-    fn test_valid_networks() {
-        let legacy_payload = &[
-            Payload::PubkeyHash(PubkeyHash::default()),
-            Payload::ScriptHash(ScriptHash::default())
-        ];
-        let segwit_payload = (0..=16).map(|version| {
-            Payload::WitnessProgram {
-                version: WitnessVersion::from_num(version).unwrap(),
-                program: vec![]
-            }
-        }).collect::<Vec<_>>();
-
-        const LEGACY_EQUIVALENCE_CLASSES: &[&[Network]] = &[
-            &[Network::Dash],
-            &[Network::Testnet, Network::Regtest, Network::Devnet],
-        ];
-        const SEGWIT_EQUIVALENCE_CLASSES: &[&[Network]] = &[
-            &[Network::Dash],
-            &[Network::Regtest],
-            &[Network::Testnet, Network::Devnet],
-        ];
-
-        fn test_addr_type(payloads: &[Payload], equivalence_classes: &[&[Network]]) {
-            for pl in payloads {
-                for addr_net in equivalence_classes.iter().map(|ec| ec.iter()).flatten() {
-                    for valid_net in equivalence_classes.iter()
-                        .filter(|ec| ec.contains(addr_net))
-                        .map(|ec| ec.iter())
-                        .flatten()
-                    {
-                        let addr = Address {
-                            payload: pl.clone(),
-                            network: *addr_net
-                        };
-                        assert!(addr.is_valid_for_network(*valid_net));
-                    }
-
-                    for invalid_net in equivalence_classes.iter()
-                        .filter(|ec| !ec.contains(addr_net))
-                        .map(|ec| ec.iter())
-                        .flatten()
-                    {
-                        let addr = Address {
-                            payload: pl.clone(),
-                            network: *addr_net
-                        };
-                        assert!(!addr.is_valid_for_network(*invalid_net));
-                    }
-                }
-            }
-        }
-
-        test_addr_type(legacy_payload, LEGACY_EQUIVALENCE_CLASSES);
-        test_addr_type(&segwit_payload, SEGWIT_EQUIVALENCE_CLASSES);
-    }
-
-    #[test]
-    fn p2tr_from_untweaked() {
-        //Test case from BIP-086
-        let internal_key = XOnlyPublicKey::from_str("cc8a4bc64d897bddc5fbc2f670f7a8ba0b386779106cf1223c6fc5d7cd6fc115").unwrap();
-        let secp = Secp256k1::verification_only();
-        let address = Address::p2tr(&secp, internal_key, None, Network::Dash);
-        assert_eq!(address.to_string(), "ds1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqq9xzlq");
-        assert_eq!(address.address_type(), Some(AddressType::P2tr));
-        roundtrips(&address);
-    }
-
-    #[ignore]
-    #[test]
-    fn test_is_related_to_pubkey_p2wpkh() {
-        let address_string = "ds1qhvd6suvqzjcu9pxjhrwhtrlj85ny3n2mqql5w4";
-        let address = Address::from_str(address_string).expect("address");
-
-        let pubkey_string = "0347ff3dacd07a1f43805ec6808e801505a6e18245178609972a68afbc2777ff2b";
-        let pubkey = PublicKey::from_str(pubkey_string).expect("pubkey");
-
-        let result = address.is_related_to_pubkey(&pubkey);
-        assert!(result);
-
-        let unused_pubkey = PublicKey::from_str("02ba604e6ad9d3864eda8dc41c62668514ef7d5417d3b6db46e45cc4533bff001c").expect("pubkey");
-        assert!(!address.is_related_to_pubkey(&unused_pubkey))
-    }
-
-    #[test]
-    fn test_is_related_to_pubkey_p2shwpkh() {
-        let address_string = "7fH3aFXJ5TWv5eNScx7m4FCf3XD27mXYHq";
-        let address = Address::from_str(address_string).expect("address");
-
-        let pubkey_string = "0347ff3dacd07a1f43805ec6808e801505a6e18245178609972a68afbc2777ff2b";
-        let pubkey = PublicKey::from_str(pubkey_string).expect("pubkey");
-
-        assert_eq!(address_string, Address::p2shwpkh(&pubkey, Network::Dash).expect("expected a compressed key").to_string());
-
-        let result = address.is_related_to_pubkey(&pubkey);
-        assert!(result);
-
-        let unused_pubkey = PublicKey::from_str("02ba604e6ad9d3864eda8dc41c62668514ef7d5417d3b6db46e45cc4533bff001c").expect("pubkey");
-        assert!(!address.is_related_to_pubkey(&unused_pubkey))
-    }
-
-    #[test]
-    fn test_is_related_to_pubkey_p2pkh() {
-        let address_string = "XgjvsEewx8SHii5SFYM856eU2qGrJuZ3AN";
-        let address = Address::from_str(address_string).expect("address");
-
-        let pubkey_string = "0370be7922711cf8e19923d40126d1fb1a7300d873019abd58c7984aeff44f8ce4";
-        let pubkey = PublicKey::from_str(pubkey_string).expect("pubkey");
-
-        let result = address.is_related_to_pubkey(&pubkey);
-        assert!(result);
-
-        let unused_pubkey = PublicKey::from_str("02ba604e6ad9d3864eda8dc41c62668514ef7d5417d3b6db46e45cc4533bff001c").expect("pubkey");
-        assert!(!address.is_related_to_pubkey(&unused_pubkey))
-    }
-
-    #[test]
-    fn test_is_related_to_pubkey_p2pkh_uncompressed_key() {
-        let address_string = "Xo6KeXZcaKyZCEMGioNYnsrPskpUZAZFhr";
-        let address = Address::from_str(address_string).expect("address");
-
-        let pubkey_string = "04e96e22004e3db93530de27ccddfdf1463975d2138ac018fc3e7ba1a2e5e0aad8e424d0b55e2436eb1d0dcd5cb2b8bcc6d53412c22f358de57803a6a655fbbd04";
-        let pubkey = PublicKey::from_str(pubkey_string).expect("pubkey");
-
-        assert_eq!(address_string, Address::p2pkh(&pubkey, Network::Dash).to_string());
-        let result = address.is_related_to_pubkey(&pubkey);
-        assert!(result);
-
-        let unused_pubkey = PublicKey::from_str("02ba604e6ad9d3864eda8dc41c62668514ef7d5417d3b6db46e45cc4533bff001c").expect("pubkey");
-        assert!(!address.is_related_to_pubkey(&unused_pubkey))
-    }
-
-    #[ignore]
-    #[test]
-    fn test_is_related_to_pubkey_p2tr(){
-        let pubkey_string = "0347ff3dacd07a1f43805ec6808e801505a6e18245178609972a68afbc2777ff2b";
-        let pubkey = PublicKey::from_str(pubkey_string).expect("pubkey");
-        let xonly_pubkey = XOnlyPublicKey::from(pubkey.inner);
-        let tweaked_pubkey = TweakedPublicKey::dangerous_assume_tweaked(xonly_pubkey);
-        let address = Address::p2tr_tweaked(tweaked_pubkey, Network::Dash);
-
-        assert_eq!(address, Address::from_str("bc1pgllnmtxs0g058qz7c6qgaqq4qknwrqj9z7rqn9e2dzhmcfmhlu4sfadf5e").expect("address"));
-
-        let result = address.is_related_to_pubkey(&pubkey);
-        assert!(result);
-
-        let unused_pubkey = PublicKey::from_str("02ba604e6ad9d3864eda8dc41c62668514ef7d5417d3b6db46e45cc4533bff001c").expect("pubkey");
-        assert!(!address.is_related_to_pubkey(&unused_pubkey));
-    }
-
-    #[ignore]
-    #[test]
-    fn test_is_related_to_xonly_pubkey(){
-        let pubkey_string = "0347ff3dacd07a1f43805ec6808e801505a6e18245178609972a68afbc2777ff2b";
-        let pubkey = PublicKey::from_str(pubkey_string).expect("pubkey");
-        let xonly_pubkey = XOnlyPublicKey::from(pubkey.inner);
-        let tweaked_pubkey = TweakedPublicKey::dangerous_assume_tweaked(xonly_pubkey);
-        let address = Address::p2tr_tweaked(tweaked_pubkey, Network::Dash);
-
-        assert_eq!(address, Address::from_str("ds1pgllnmtxs0g058qz7c6qgaqq4qknwrqj9z7rqn9e2dzhmcfmhlu4sfadf5e").expect("address"));
-
-        let result = address.is_related_to_xonly_pubkey(&xonly_pubkey);
-        assert!(result);
-    }
-}
diff --git a/src/util/amount.rs b/src/util/amount.rs
deleted file mode 100644
index b58a1d78d..000000000
--- a/src/util/amount.rs
+++ /dev/null
@@ -1,1767 +0,0 @@
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Bitcoin amounts.
-//!
-//! This module mainly introduces the [Amount] and [SignedAmount] types.
-//! We refer to the documentation on the types for more information.
-//!
-
-use prelude::*;
-
-use core::{ops, default, str::FromStr, cmp::Ordering};
-use core::fmt::{self, Write};
-
-/// A set of denominations in which amounts can be expressed.
-#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
-pub enum Denomination {
-    /// BTC
-    Bitcoin,
-    /// mBTC
-    MilliBitcoin,
-    /// uBTC
-    MicroBitcoin,
-    /// nBTC
-    NanoBitcoin,
-    /// pBTC
-    PicoBitcoin,
-    /// bits
-    Bit,
-    /// satoshi
-    Satoshi,
-    /// msat
-    MilliSatoshi,
-}
-
-impl Denomination {
-    /// The number of decimal places more than a satoshi.
-    fn precision(self) -> i32 {
-        match self {
-            Denomination::Bitcoin => -8,
-            Denomination::MilliBitcoin => -5,
-            Denomination::MicroBitcoin => -2,
-            Denomination::NanoBitcoin => 1,
-            Denomination::PicoBitcoin => 4,
-            Denomination::Bit => -2,
-            Denomination::Satoshi => 0,
-            Denomination::MilliSatoshi => 3,
-        }
-    }
-}
-
-impl fmt::Display for Denomination {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(match *self {
-            Denomination::Bitcoin => "BTC",
-            Denomination::MilliBitcoin => "mBTC",
-            Denomination::MicroBitcoin => "uBTC",
-            Denomination::NanoBitcoin => "nBTC",
-            Denomination::PicoBitcoin => "pBTC",
-            Denomination::Bit => "bits",
-            Denomination::Satoshi => "satoshi",
-            Denomination::MilliSatoshi => "msat",
-        })
-    }
-}
-
-impl FromStr for Denomination {
-    type Err = ParseAmountError;
-
-    /// Convert from a str to Denomination.
-    ///
-    /// Any combination of upper and/or lower case, excluding uppercase of SI(m, u, n, p) is considered valid.
-    /// - Singular: BTC, mBTC, uBTC, nBTC, pBTC
-    /// - Plural or singular: sat, satoshi, bit, msat
-    ///
-    /// Due to ambiguity between mega and milli, pico and peta we prohibit usage of leading capital 'M', 'P'.
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        use self::ParseAmountError::*;
-        use self::Denomination as D;
-
-        let starts_with_uppercase = || s.starts_with(char::is_uppercase);
-        match denomination_from_str(s) {
-            None => Err(UnknownDenomination(s.to_owned())),
-            Some(D::MilliBitcoin) | Some(D::PicoBitcoin) | Some(D::MilliSatoshi) if starts_with_uppercase() => {
-                Err(PossiblyConfusingDenomination(s.to_owned()))
-            }
-            Some(D::NanoBitcoin) | Some(D::MicroBitcoin) if starts_with_uppercase() => {
-                Err(UnknownDenomination(s.to_owned()))
-            }
-            Some(d) => Ok(d),
-        }
-    }
-}
-
-fn denomination_from_str(mut s: &str) -> Option<Denomination> {
-    if s.eq_ignore_ascii_case("BTC") {
-        return Some(Denomination::Bitcoin);
-    }
-
-    if s.eq_ignore_ascii_case("mBTC") {
-        return Some(Denomination::MilliBitcoin);
-    }
-
-    if s.eq_ignore_ascii_case("uBTC") {
-        return Some(Denomination::MicroBitcoin);
-    }
-
-    if s.eq_ignore_ascii_case("nBTC") {
-        return Some(Denomination::NanoBitcoin);
-    }
-
-    if s.eq_ignore_ascii_case("pBTC") {
-        return Some(Denomination::PicoBitcoin);
-    }
-
-    if s.ends_with('s') || s.ends_with('S') {
-        s = &s[..(s.len() - 1)];
-    }
-
-    if s.eq_ignore_ascii_case("bit") {
-        return Some(Denomination::Bit);
-    }
-    if s.eq_ignore_ascii_case("satoshi") {
-        return Some(Denomination::Satoshi);
-    }
-    if s.eq_ignore_ascii_case("sat") {
-        return Some(Denomination::Satoshi);
-    }
-
-    if s.eq_ignore_ascii_case("msat") {
-        return Some(Denomination::MilliSatoshi);
-    }
-
-    None
-}
-
-/// An error during amount parsing.
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub enum ParseAmountError {
-    /// Amount is negative.
-    Negative,
-    /// Amount is too big to fit inside the type.
-    TooBig,
-    /// Amount has higher precision than supported by the type.
-    TooPrecise,
-    /// Invalid number format.
-    InvalidFormat,
-    /// Input string was too large.
-    InputTooLarge,
-    /// Invalid character in input.
-    InvalidCharacter(char),
-    /// The denomination was unknown.
-    UnknownDenomination(String),
-    /// The denomination has multiple possible interpretations.
-    PossiblyConfusingDenomination(String)
-}
-
-impl fmt::Display for ParseAmountError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            ParseAmountError::Negative => f.write_str("amount is negative"),
-            ParseAmountError::TooBig => f.write_str("amount is too big"),
-            ParseAmountError::TooPrecise => f.write_str("amount has a too high precision"),
-            ParseAmountError::InvalidFormat => f.write_str("invalid number format"),
-            ParseAmountError::InputTooLarge => f.write_str("input string was too large"),
-            ParseAmountError::InvalidCharacter(c) => write!(f, "invalid character in input: {}", c),
-            ParseAmountError::UnknownDenomination(ref d) => write!(f, "unknown denomination: {}", d),
-            ParseAmountError::PossiblyConfusingDenomination(ref d) => {
-                let (letter, upper, lower) = match d.chars().next() {
-                    Some('M') => ('M', "Mega", "milli"),
-                    Some('P') => ('P', "Peta", "pico"),
-                    // This panic could be avoided by adding enum ConfusingDenomination { Mega, Peta } but is it worth it?
-                    _ => panic!("invalid error information"),
-                };
-                write!(f, "the '{}' at the beginning of {} should technically mean '{}' but that denomination is uncommon and maybe '{}' was intended", letter, d, upper, lower)
-            }
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl ::std::error::Error for ParseAmountError {}
-
-fn is_too_precise(s: &str, precision: usize) -> bool {
-    s.contains('.') || precision >= s.len() || s.chars().rev().take(precision).any(|d| d != '0')
-}
-
-/// Parse decimal string in the given denomination into a satoshi value and a
-/// bool indicator for a negative amount.
-fn parse_signed_to_satoshi(
-    mut s: &str,
-    denom: Denomination,
-) -> Result<(bool, u64), ParseAmountError> {
-    if s.is_empty() {
-        return Err(ParseAmountError::InvalidFormat);
-    }
-    if s.len() > 50 {
-        return Err(ParseAmountError::InputTooLarge);
-    }
-
-    let is_negative = s.starts_with('-');
-    if is_negative {
-        if s.len() == 1 {
-            return Err(ParseAmountError::InvalidFormat);
-        }
-        s = &s[1..];
-    }
-
-    let max_decimals = {
-        // The difference in precision between native (satoshi)
-        // and desired denomination.
-        let precision_diff = -denom.precision();
-        if precision_diff < 0 {
-            // If precision diff is negative, this means we are parsing
-            // into a less precise amount. That is not allowed unless
-            // there are no decimals and the last digits are zeroes as
-            // many as the difference in precision.
-            let last_n = precision_diff.abs() as usize;
-            if is_too_precise(s, last_n) {
-                return Err(ParseAmountError::TooPrecise);
-            }
-            s = &s[0..s.len() - last_n];
-            0
-        } else {
-            precision_diff
-        }
-    };
-
-    let mut decimals = None;
-    let mut value: u64 = 0; // as satoshis
-    for c in s.chars() {
-        match c {
-            '0'..='9' => {
-                // Do `value = 10 * value + digit`, catching overflows.
-                match 10_u64.checked_mul(value) {
-                    None => return Err(ParseAmountError::TooBig),
-                    Some(val) => match val.checked_add((c as u8 - b'0') as u64) {
-                        None => return Err(ParseAmountError::TooBig),
-                        Some(val) => value = val,
-                    },
-                }
-                // Increment the decimal digit counter if past decimal.
-                decimals = match decimals {
-                    None => None,
-                    Some(d) if d < max_decimals => Some(d + 1),
-                    _ => return Err(ParseAmountError::TooPrecise),
-                };
-            }
-            '.' => match decimals {
-                None => decimals = Some(0),
-                // Double decimal dot.
-                _ => return Err(ParseAmountError::InvalidFormat),
-            },
-            c => return Err(ParseAmountError::InvalidCharacter(c)),
-        }
-    }
-
-    // Decimally shift left by `max_decimals - decimals`.
-    let scale_factor = max_decimals - decimals.unwrap_or(0);
-    for _ in 0..scale_factor {
-        value = match 10_u64.checked_mul(value) {
-            Some(v) => v,
-            None => return Err(ParseAmountError::TooBig),
-        };
-    }
-
-    Ok((is_negative, value))
-}
-
-/// Format the given satoshi amount in the given denomination.
-///
-/// Does not include the denomination.
-fn fmt_satoshi_in(
-    satoshi: u64,
-    negative: bool,
-    f: &mut dyn fmt::Write,
-    denom: Denomination,
-) -> fmt::Result {
-    if negative {
-        f.write_str("-")?;
-    }
-
-    let precision = denom.precision();
-    match precision.cmp(&0) {
-        Ordering::Greater => {
-            // add zeroes in the end
-            let width = precision as usize;
-            write!(f, "{}{:0width$}", satoshi, 0, width = width)?;
-        }
-        Ordering::Less => {
-            // need to inject a comma in the number
-            let nb_decimals = precision.abs() as usize;
-            let real = format!("{:0width$}", satoshi, width = nb_decimals);
-            if real.len() == nb_decimals {
-                write!(f, "0.{}", &real[real.len() - nb_decimals..])?;
-            } else {
-                write!(
-                    f,
-                    "{}.{}",
-                    &real[0..(real.len() - nb_decimals)],
-                    &real[real.len() - nb_decimals..]
-                )?;
-            }
-        }
-        Ordering::Equal => write!(f, "{}", satoshi)?,
-    }
-    Ok(())
-}
-
-/// Amount
-///
-/// The [Amount] type can be used to express Bitcoin amounts that supports
-/// arithmetic and conversion to various denominations.
-///
-///
-/// Warning!
-///
-/// This type implements several arithmetic operations from [core::ops].
-/// To prevent errors due to overflow or underflow when using these operations,
-/// it is advised to instead use the checked arithmetic methods whose names
-/// start with `checked_`.  The operations from [core::ops] that [Amount]
-/// implements will panic when overflow or underflow occurs.  Also note that
-/// since the internal representation of amounts is unsigned, subtracting below
-/// zero is considered an underflow and will cause a panic if you're not using
-/// the checked arithmetic methods.
-///
-#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub struct Amount(u64);
-
-impl Amount {
-    /// The zero amount.
-    pub const ZERO: Amount = Amount(0);
-    /// Exactly one satoshi.
-    pub const ONE_SAT: Amount = Amount(1);
-    /// Exactly one bitcoin.
-    pub const ONE_BTC: Amount = Amount(100_000_000);
-    /// The maximum value allowed as an amount. Useful for sanity checking.
-    pub const MAX_MONEY: Amount = Amount(21_000_000 * 100_000_000);
-
-    /// Create an [Amount] with satoshi precision and the given number of satoshis.
-    pub const fn from_sat(satoshi: u64) -> Amount {
-        Amount(satoshi)
-    }
-
-    /// Get the number of satoshis in this [Amount].
-    pub fn as_sat(self) -> u64 {
-        self.0
-    }
-
-    /// The maximum value of an [Amount].
-    pub fn max_value() -> Amount {
-        Amount(u64::max_value())
-    }
-
-    /// The minimum value of an [Amount].
-    pub fn min_value() -> Amount {
-        Amount(u64::min_value())
-    }
-
-    /// Convert from a value expressing bitcoins to an [Amount].
-    pub fn from_btc(btc: f64) -> Result<Amount, ParseAmountError> {
-        Amount::from_float_in(btc, Denomination::Bitcoin)
-    }
-
-    /// Parse a decimal string as a value in the given denomination.
-    ///
-    /// Note: This only parses the value string.  If you want to parse a value
-    /// with denomination, use [FromStr].
-    pub fn from_str_in(s: &str, denom: Denomination) -> Result<Amount, ParseAmountError> {
-        let (negative, satoshi) = parse_signed_to_satoshi(s, denom)?;
-        if negative {
-            return Err(ParseAmountError::Negative);
-        }
-        if satoshi > i64::max_value() as u64 {
-            return Err(ParseAmountError::TooBig);
-        }
-        Ok(Amount::from_sat(satoshi))
-    }
-
-    /// Parses amounts with denomination suffix like they are produced with
-    /// [Self::to_string_with_denomination] or with [fmt::Display].
-    /// If you want to parse only the amount without the denomination,
-    /// use [Self::from_str_in].
-    pub fn from_str_with_denomination(s: &str) -> Result<Amount, ParseAmountError> {
-        let mut split = s.splitn(3, ' ');
-        let amt_str = split.next().unwrap();
-        let denom_str = split.next().ok_or(ParseAmountError::InvalidFormat)?;
-        if split.next().is_some() {
-            return Err(ParseAmountError::InvalidFormat);
-        }
-
-        Amount::from_str_in(amt_str, denom_str.parse()?)
-    }
-
-    /// Express this [Amount] as a floating-point value in the given denomination.
-    ///
-    /// Please be aware of the risk of using floating-point numbers.
-    pub fn to_float_in(self, denom: Denomination) -> f64 {
-        f64::from_str(&self.to_string_in(denom)).unwrap()
-    }
-
-    /// Express this [Amount] as a floating-point value in Bitcoin.
-    ///
-    /// Equivalent to `to_float_in(Denomination::Bitcoin)`.
-    ///
-    /// Please be aware of the risk of using floating-point numbers.
-    pub fn as_btc(self) -> f64 {
-        self.to_float_in(Denomination::Bitcoin)
-    }
-
-    /// Convert this [Amount] in floating-point notation with a given
-    /// denomination.
-    /// Can return error if the amount is too big, too precise or negative.
-    ///
-    /// Please be aware of the risk of using floating-point numbers.
-    pub fn from_float_in(value: f64, denom: Denomination) -> Result<Amount, ParseAmountError> {
-        if value < 0.0 {
-            return Err(ParseAmountError::Negative);
-        }
-        // This is inefficient, but the safest way to deal with this. The parsing logic is safe.
-        // Any performance-critical application should not be dealing with floats.
-        Amount::from_str_in(&value.to_string(), denom)
-    }
-
-    /// Format the value of this [Amount] in the given denomination.
-    ///
-    /// Does not include the denomination.
-    pub fn fmt_value_in(self, f: &mut dyn fmt::Write, denom: Denomination) -> fmt::Result {
-        fmt_satoshi_in(self.as_sat(), false, f, denom)
-    }
-
-    /// Get a string number of this [Amount] in the given denomination.
-    ///
-    /// Does not include the denomination.
-    pub fn to_string_in(self, denom: Denomination) -> String {
-        let mut buf = String::new();
-        self.fmt_value_in(&mut buf, denom).unwrap();
-        buf
-    }
-
-    /// Get a formatted string of this [Amount] in the given denomination,
-    /// suffixed with the abbreviation for the denomination.
-    pub fn to_string_with_denomination(self, denom: Denomination) -> String {
-        let mut buf = String::new();
-        self.fmt_value_in(&mut buf, denom).unwrap();
-        write!(buf, " {}", denom).unwrap();
-        buf
-    }
-
-    // Some arithmetic that doesn't fit in `core::ops` traits.
-
-    /// Checked addition.
-    /// Returns [None] if overflow occurred.
-    pub fn checked_add(self, rhs: Amount) -> Option<Amount> {
-        self.0.checked_add(rhs.0).map(Amount)
-    }
-
-    /// Checked subtraction.
-    /// Returns [None] if overflow occurred.
-    pub fn checked_sub(self, rhs: Amount) -> Option<Amount> {
-        self.0.checked_sub(rhs.0).map(Amount)
-    }
-
-    /// Checked multiplication.
-    /// Returns [None] if overflow occurred.
-    pub fn checked_mul(self, rhs: u64) -> Option<Amount> {
-        self.0.checked_mul(rhs).map(Amount)
-    }
-
-    /// Checked integer division.
-    /// Be aware that integer division loses the remainder if no exact division
-    /// can be made.
-    /// Returns [None] if overflow occurred.
-    pub fn checked_div(self, rhs: u64) -> Option<Amount> {
-        self.0.checked_div(rhs).map(Amount)
-    }
-
-    /// Checked remainder.
-    /// Returns [None] if overflow occurred.
-    pub fn checked_rem(self, rhs: u64) -> Option<Amount> {
-        self.0.checked_rem(rhs).map(Amount)
-    }
-
-    /// Convert to a signed amount.
-    pub fn to_signed(self) -> Result<SignedAmount, ParseAmountError> {
-        if self.as_sat() > SignedAmount::max_value().as_sat() as u64 {
-            Err(ParseAmountError::TooBig)
-        } else {
-            Ok(SignedAmount::from_sat(self.as_sat() as i64))
-        }
-    }
-}
-
-impl default::Default for Amount {
-    fn default() -> Self {
-        Amount::ZERO
-    }
-}
-
-impl fmt::Debug for Amount {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "Amount({:.8} BTC)", self.as_btc())
-    }
-}
-
-// No one should depend on a binding contract for Display for this type.
-// Just using Bitcoin denominated string.
-impl fmt::Display for Amount {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        self.fmt_value_in(f, Denomination::Bitcoin)?;
-        write!(f, " {}", Denomination::Bitcoin)
-    }
-}
-
-impl ops::Add for Amount {
-    type Output = Amount;
-
-    fn add(self, rhs: Amount) -> Self::Output {
-        self.checked_add(rhs).expect("Amount addition error")
-    }
-}
-
-impl ops::AddAssign for Amount {
-    fn add_assign(&mut self, other: Amount) {
-        *self = *self + other
-    }
-}
-
-impl ops::Sub for Amount {
-    type Output = Amount;
-
-    fn sub(self, rhs: Amount) -> Self::Output {
-        self.checked_sub(rhs).expect("Amount subtraction error")
-    }
-}
-
-impl ops::SubAssign for Amount {
-    fn sub_assign(&mut self, other: Amount) {
-        *self = *self - other
-    }
-}
-
-impl ops::Rem<u64> for Amount {
-    type Output = Amount;
-
-    fn rem(self, modulus: u64) -> Self {
-        self.checked_rem(modulus).expect("Amount remainder error")
-    }
-}
-
-impl ops::RemAssign<u64> for Amount {
-    fn rem_assign(&mut self, modulus: u64) {
-        *self = *self % modulus
-    }
-}
-
-impl ops::Mul<u64> for Amount {
-    type Output = Amount;
-
-    fn mul(self, rhs: u64) -> Self::Output {
-        self.checked_mul(rhs).expect("Amount multiplication error")
-    }
-}
-
-impl ops::MulAssign<u64> for Amount {
-    fn mul_assign(&mut self, rhs: u64) {
-        *self = *self * rhs
-    }
-}
-
-impl ops::Div<u64> for Amount {
-    type Output = Amount;
-
-    fn div(self, rhs: u64) -> Self::Output {
-        self.checked_div(rhs).expect("Amount division error")
-    }
-}
-
-impl ops::DivAssign<u64> for Amount {
-    fn div_assign(&mut self, rhs: u64) {
-        *self = *self / rhs
-    }
-}
-
-impl FromStr for Amount {
-    type Err = ParseAmountError;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        Amount::from_str_with_denomination(s)
-    }
-}
-
-impl ::core::iter::Sum for Amount {
-    fn sum<I: Iterator<Item = Self>>(iter: I) -> Self {
-        let sats: u64 = iter.map(|amt| amt.0).sum();
-        Amount::from_sat(sats)
-    }
-}
-
-/// SignedAmount
-///
-/// The [SignedAmount] type can be used to express Bitcoin amounts that supports
-/// arithmetic and conversion to various denominations.
-///
-///
-/// Warning!
-///
-/// This type implements several arithmetic operations from [core::ops].
-/// To prevent errors due to overflow or underflow when using these operations,
-/// it is advised to instead use the checked arithmetic methods whose names
-/// start with `checked_`.  The operations from [core::ops] that [Amount]
-/// implements will panic when overflow or underflow occurs.
-///
-#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub struct SignedAmount(i64);
-
-impl SignedAmount {
-    /// The zero amount.
-    pub const ZERO: SignedAmount = SignedAmount(0);
-    /// Exactly one satoshi.
-    pub const ONE_SAT: SignedAmount = SignedAmount(1);
-    /// Exactly one bitcoin.
-    pub const ONE_BTC: SignedAmount = SignedAmount(100_000_000);
-    /// The maximum value allowed as an amount. Useful for sanity checking.
-    pub const MAX_MONEY: SignedAmount = SignedAmount(21_000_000 * 100_000_000);
-
-    /// Create an [SignedAmount] with satoshi precision and the given number of satoshis.
-    pub const fn from_sat(satoshi: i64) -> SignedAmount {
-        SignedAmount(satoshi)
-    }
-
-    /// Get the number of satoshis in this [SignedAmount].
-    pub fn as_sat(self) -> i64 {
-        self.0
-    }
-
-    /// The maximum value of an [SignedAmount].
-    pub fn max_value() -> SignedAmount {
-        SignedAmount(i64::max_value())
-    }
-
-    /// The minimum value of an [SignedAmount].
-    pub fn min_value() -> SignedAmount {
-        SignedAmount(i64::min_value())
-    }
-
-    /// Convert from a value expressing bitcoins to an [SignedAmount].
-    pub fn from_btc(btc: f64) -> Result<SignedAmount, ParseAmountError> {
-        SignedAmount::from_float_in(btc, Denomination::Bitcoin)
-    }
-
-    /// Parse a decimal string as a value in the given denomination.
-    ///
-    /// Note: This only parses the value string.  If you want to parse a value
-    /// with denomination, use [FromStr].
-    pub fn from_str_in(s: &str, denom: Denomination) -> Result<SignedAmount, ParseAmountError> {
-        let (negative, satoshi) = parse_signed_to_satoshi(s, denom)?;
-        if satoshi > i64::max_value() as u64 {
-            return Err(ParseAmountError::TooBig);
-        }
-        Ok(match negative {
-            true => SignedAmount(-(satoshi as i64)),
-            false => SignedAmount(satoshi as i64),
-        })
-    }
-
-    /// Parses amounts with denomination suffix like they are produced with
-    /// [Self::to_string_with_denomination] or with [fmt::Display].
-    /// If you want to parse only the amount without the denomination,
-    /// use [Self::from_str_in].
-    pub fn from_str_with_denomination(s: &str) -> Result<SignedAmount, ParseAmountError> {
-        let mut split = s.splitn(3, ' ');
-        let amt_str = split.next().unwrap();
-        let denom_str = split.next().ok_or(ParseAmountError::InvalidFormat)?;
-        if split.next().is_some() {
-            return Err(ParseAmountError::InvalidFormat);
-        }
-
-        SignedAmount::from_str_in(amt_str, denom_str.parse()?)
-    }
-
-    /// Express this [SignedAmount] as a floating-point value in the given denomination.
-    ///
-    /// Please be aware of the risk of using floating-point numbers.
-    pub fn to_float_in(self, denom: Denomination) -> f64 {
-        f64::from_str(&self.to_string_in(denom)).unwrap()
-    }
-
-    /// Express this [SignedAmount] as a floating-point value in Bitcoin.
-    ///
-    /// Equivalent to `to_float_in(Denomination::Bitcoin)`.
-    ///
-    /// Please be aware of the risk of using floating-point numbers.
-    pub fn as_btc(self) -> f64 {
-        self.to_float_in(Denomination::Bitcoin)
-    }
-
-    /// Convert this [SignedAmount] in floating-point notation with a given
-    /// denomination.
-    /// Can return error if the amount is too big, too precise or negative.
-    ///
-    /// Please be aware of the risk of using floating-point numbers.
-    pub fn from_float_in(
-        value: f64,
-        denom: Denomination,
-    ) -> Result<SignedAmount, ParseAmountError> {
-        // This is inefficient, but the safest way to deal with this. The parsing logic is safe.
-        // Any performance-critical application should not be dealing with floats.
-        SignedAmount::from_str_in(&value.to_string(), denom)
-    }
-
-    /// Format the value of this [SignedAmount] in the given denomination.
-    ///
-    /// Does not include the denomination.
-    pub fn fmt_value_in(self, f: &mut dyn fmt::Write, denom: Denomination) -> fmt::Result {
-        let sats = self.as_sat().checked_abs().map(|a: i64| a as u64).unwrap_or_else(|| {
-            // We could also hard code this into `9223372036854775808`
-            u64::max_value() - self.as_sat() as u64 +1
-        });
-        fmt_satoshi_in(sats, self.is_negative(), f, denom)
-    }
-
-    /// Get a string number of this [SignedAmount] in the given denomination.
-    ///
-    /// Does not include the denomination.
-    pub fn to_string_in(self, denom: Denomination) -> String {
-        let mut buf = String::new();
-        self.fmt_value_in(&mut buf, denom).unwrap();
-        buf
-    }
-
-    /// Get a formatted string of this [SignedAmount] in the given denomination,
-    /// suffixed with the abbreviation for the denomination.
-    pub fn to_string_with_denomination(self, denom: Denomination) -> String {
-        let mut buf = String::new();
-        self.fmt_value_in(&mut buf, denom).unwrap();
-        write!(buf, " {}", denom).unwrap();
-        buf
-    }
-
-    // Some arithmetic that doesn't fit in `core::ops` traits.
-
-    /// Get the absolute value of this [SignedAmount].
-    pub fn abs(self) -> SignedAmount {
-        SignedAmount(self.0.abs())
-    }
-
-    /// Returns a number representing sign of this [SignedAmount].
-    ///
-    /// - `0` if the amount is zero
-    /// - `1` if the amount is positive
-    /// - `-1` if the amount is negative
-    pub fn signum(self) -> i64 {
-        self.0.signum()
-    }
-
-    /// Returns `true` if this [SignedAmount] is positive and `false` if
-    /// this [SignedAmount] is zero or negative.
-    pub fn is_positive(self) -> bool {
-        self.0.is_positive()
-    }
-
-    /// Returns `true` if this [SignedAmount] is negative and `false` if
-    /// this [SignedAmount] is zero or positive.
-    pub fn is_negative(self) -> bool {
-        self.0.is_negative()
-    }
-
-
-    /// Get the absolute value of this [SignedAmount].
-    /// Returns [None] if overflow occurred. (`self == min_value()`)
-    pub fn checked_abs(self) -> Option<SignedAmount> {
-        self.0.checked_abs().map(SignedAmount)
-    }
-
-    /// Checked addition.
-    /// Returns [None] if overflow occurred.
-    pub fn checked_add(self, rhs: SignedAmount) -> Option<SignedAmount> {
-        self.0.checked_add(rhs.0).map(SignedAmount)
-    }
-
-    /// Checked subtraction.
-    /// Returns [None] if overflow occurred.
-    pub fn checked_sub(self, rhs: SignedAmount) -> Option<SignedAmount> {
-        self.0.checked_sub(rhs.0).map(SignedAmount)
-    }
-
-    /// Checked multiplication.
-    /// Returns [None] if overflow occurred.
-    pub fn checked_mul(self, rhs: i64) -> Option<SignedAmount> {
-        self.0.checked_mul(rhs).map(SignedAmount)
-    }
-
-    /// Checked integer division.
-    /// Be aware that integer division loses the remainder if no exact division
-    /// can be made.
-    /// Returns [None] if overflow occurred.
-    pub fn checked_div(self, rhs: i64) -> Option<SignedAmount> {
-        self.0.checked_div(rhs).map(SignedAmount)
-    }
-
-    /// Checked remainder.
-    /// Returns [None] if overflow occurred.
-    pub fn checked_rem(self, rhs: i64) -> Option<SignedAmount> {
-        self.0.checked_rem(rhs).map(SignedAmount)
-    }
-
-    /// Subtraction that doesn't allow negative [SignedAmount]s.
-    /// Returns [None] if either [self], `rhs` or the result is strictly negative.
-    pub fn positive_sub(self, rhs: SignedAmount) -> Option<SignedAmount> {
-        if self.is_negative() || rhs.is_negative() || rhs > self {
-            None
-        } else {
-            self.checked_sub(rhs)
-        }
-    }
-
-    /// Convert to an unsigned amount.
-    pub fn to_unsigned(self) -> Result<Amount, ParseAmountError> {
-        if self.is_negative() {
-            Err(ParseAmountError::Negative)
-        } else {
-            Ok(Amount::from_sat(self.as_sat() as u64))
-        }
-    }
-}
-
-impl default::Default for SignedAmount {
-    fn default() -> Self {
-        SignedAmount::ZERO
-    }
-}
-
-impl fmt::Debug for SignedAmount {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "SignedAmount({:.8} BTC)", self.as_btc())
-    }
-}
-
-// No one should depend on a binding contract for Display for this type.
-// Just using Bitcoin denominated string.
-impl fmt::Display for SignedAmount {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        self.fmt_value_in(f, Denomination::Bitcoin)?;
-        write!(f, " {}", Denomination::Bitcoin)
-    }
-}
-
-impl ops::Add for SignedAmount {
-    type Output = SignedAmount;
-
-    fn add(self, rhs: SignedAmount) -> Self::Output {
-        self.checked_add(rhs).expect("SignedAmount addition error")
-    }
-}
-
-impl ops::AddAssign for SignedAmount {
-    fn add_assign(&mut self, other: SignedAmount) {
-        *self = *self + other
-    }
-}
-
-impl ops::Sub for SignedAmount {
-    type Output = SignedAmount;
-
-    fn sub(self, rhs: SignedAmount) -> Self::Output {
-        self.checked_sub(rhs).expect("SignedAmount subtraction error")
-    }
-}
-
-impl ops::SubAssign for SignedAmount {
-    fn sub_assign(&mut self, other: SignedAmount) {
-        *self = *self - other
-    }
-}
-
-impl ops::Rem<i64> for SignedAmount {
-    type Output = SignedAmount;
-
-    fn rem(self, modulus: i64) -> Self {
-        self.checked_rem(modulus).expect("SignedAmount remainder error")
-    }
-}
-
-impl ops::RemAssign<i64> for SignedAmount {
-    fn rem_assign(&mut self, modulus: i64) {
-        *self = *self % modulus
-    }
-}
-
-impl ops::Mul<i64> for SignedAmount {
-    type Output = SignedAmount;
-
-    fn mul(self, rhs: i64) -> Self::Output {
-        self.checked_mul(rhs).expect("SignedAmount multiplication error")
-    }
-}
-
-impl ops::MulAssign<i64> for SignedAmount {
-    fn mul_assign(&mut self, rhs: i64) {
-        *self = *self * rhs
-    }
-}
-
-impl ops::Div<i64> for SignedAmount {
-    type Output = SignedAmount;
-
-    fn div(self, rhs: i64) -> Self::Output {
-        self.checked_div(rhs).expect("SignedAmount division error")
-    }
-}
-
-impl ops::DivAssign<i64> for SignedAmount {
-    fn div_assign(&mut self, rhs: i64) {
-        *self = *self / rhs
-    }
-}
-
-impl FromStr for SignedAmount {
-    type Err = ParseAmountError;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        SignedAmount::from_str_with_denomination(s)
-    }
-}
-
-impl ::core::iter::Sum for SignedAmount {
-    fn sum<I: Iterator<Item = Self>>(iter: I) -> Self {
-        let sats: i64 = iter.map(|amt| amt.0).sum();
-        SignedAmount::from_sat(sats)
-    }
-}
-
-/// Calculate the sum over the iterator using checked arithmetic.
-pub trait CheckedSum<R>: private::SumSeal<R> {
-    /// Calculate the sum over the iterator using checked arithmetic. If an over or underflow would
-    /// happen it returns `None`.
-    fn checked_sum(self) -> Option<R>;
-}
-
-impl<T> CheckedSum<Amount> for T where T: Iterator<Item=Amount> {
-    fn checked_sum(mut self) -> Option<Amount> {
-        let first = Some(self.next().unwrap_or_default());
-
-        self.fold(
-            first,
-            |acc, item| acc.and_then(|acc| acc.checked_add(item))
-        )
-    }
-}
-
-impl<T> CheckedSum<SignedAmount> for T where T: Iterator<Item=SignedAmount> {
-    fn checked_sum(mut self) -> Option<SignedAmount> {
-        let first = Some(self.next().unwrap_or_default());
-
-        self.fold(first, |acc, item| acc.and_then(|acc| acc.checked_add(item)))
-    }
-}
-
-mod private {
-    use ::{Amount, SignedAmount};
-
-    /// Used to seal the `CheckedSum` trait
-    pub trait SumSeal<A> {}
-
-    impl<T> SumSeal<Amount> for T where T: Iterator<Item=Amount> {}
-    impl<T> SumSeal<SignedAmount> for T where T: Iterator<Item=SignedAmount> {}
-}
-
-#[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-pub mod serde {
-    // methods are implementation of a standardized serde-specific signature
-    #![allow(missing_docs)]
-
-    //! This module adds serde serialization and deserialization support for Amounts.
-    //! Since there is not a default way to serialize and deserialize Amounts, multiple
-    //! ways are supported and it's up to the user to decide which serialiation to use.
-    //! The provided modules can be used as follows:
-    //!
-    //! ```rust,ignore
-    //! use serde::{Serialize, Deserialize};
-    //! use bitcoin::Amount;
-    //!
-    //! #[derive(Serialize, Deserialize)]
-    //! pub struct HasAmount {
-    //!     #[serde(with = "bitcoin::util::amount::serde::as_btc")]
-    //!     pub amount: Amount,
-    //! }
-    //! ```
-
-    use serde::{Deserialize, Deserializer, Serialize, Serializer};
-    use util::amount::{Amount, Denomination, SignedAmount};
-
-    /// This trait is used only to avoid code duplication and naming collisions
-    /// of the different serde serialization crates.
-    ///
-    /// TODO: Add the private::Sealed bound in next breaking release
-    pub trait SerdeAmount: Copy + Sized {
-        fn ser_sat<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error>;
-        fn des_sat<'d, D: Deserializer<'d>>(d: D) -> Result<Self, D::Error>;
-        fn ser_btc<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error>;
-        fn des_btc<'d, D: Deserializer<'d>>(d: D) -> Result<Self, D::Error>;
-    }
-
-    mod private {
-        /// add this as a trait bound to traits which consumers of this library
-        /// should not be able to implement.
-        pub trait Sealed {}
-        impl Sealed for super::Amount {}
-        impl Sealed for super::SignedAmount {}
-    }
-
-    /// This trait is only for internal Amount type serialization/deserialization
-    pub trait SerdeAmountForOpt: Copy + Sized + SerdeAmount + private::Sealed {
-        fn type_prefix() -> &'static str;
-        fn ser_sat_opt<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error>;
-        fn ser_btc_opt<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error>;
-    }
-
-    impl SerdeAmount for Amount {
-        fn ser_sat<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
-            u64::serialize(&self.as_sat(), s)
-        }
-        fn des_sat<'d, D: Deserializer<'d>>(d: D) -> Result<Self, D::Error> {
-            Ok(Amount::from_sat(u64::deserialize(d)?))
-        }
-        fn ser_btc<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
-            f64::serialize(&self.to_float_in(Denomination::Bitcoin), s)
-        }
-        fn des_btc<'d, D: Deserializer<'d>>(d: D) -> Result<Self, D::Error> {
-            use serde::de::Error;
-            Ok(Amount::from_btc(f64::deserialize(d)?).map_err(D::Error::custom)?)
-        }
-    }
-
-    impl SerdeAmountForOpt for Amount {
-        fn type_prefix() -> &'static str {
-            "u"
-        }
-        fn ser_sat_opt<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
-            s.serialize_some(&self.as_sat())
-        }
-        fn ser_btc_opt<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
-            s.serialize_some(&self.as_btc())
-        }
-    }
-
-    impl SerdeAmount for SignedAmount {
-        fn ser_sat<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
-            i64::serialize(&self.as_sat(), s)
-        }
-        fn des_sat<'d, D: Deserializer<'d>>(d: D) -> Result<Self, D::Error> {
-            Ok(SignedAmount::from_sat(i64::deserialize(d)?))
-        }
-        fn ser_btc<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
-            f64::serialize(&self.to_float_in(Denomination::Bitcoin), s)
-        }
-        fn des_btc<'d, D: Deserializer<'d>>(d: D) -> Result<Self, D::Error> {
-            use serde::de::Error;
-            Ok(SignedAmount::from_btc(f64::deserialize(d)?).map_err(D::Error::custom)?)
-        }
-    }
-
-    impl SerdeAmountForOpt for SignedAmount {
-        fn type_prefix() -> &'static str {
-            "i"
-        }
-        fn ser_sat_opt<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
-            s.serialize_some(&self.as_sat())
-        }
-        fn ser_btc_opt<S: Serializer>(self, s: S) -> Result<S::Ok, S::Error> {
-            s.serialize_some(&self.as_btc())
-        }
-    }
-
-    pub mod as_sat {
-        //! Serialize and deserialize [`Amount`](crate::Amount) as real numbers denominated in satoshi.
-        //! Use with `#[serde(with = "amount::serde::as_sat")]`.
-
-        use serde::{Deserializer, Serializer};
-        use util::amount::serde::SerdeAmount;
-
-        pub fn serialize<A: SerdeAmount, S: Serializer>(a: &A, s: S) -> Result<S::Ok, S::Error> {
-            a.ser_sat(s)
-        }
-
-        pub fn deserialize<'d, A: SerdeAmount, D: Deserializer<'d>>(d: D) -> Result<A, D::Error> {
-            A::des_sat(d)
-        }
-
-        pub mod opt {
-            //! Serialize and deserialize [`Option<Amount>`](crate::Amount) as real numbers denominated in satoshi.
-            //! Use with `#[serde(default, with = "amount::serde::as_sat::opt")]`.
-
-            use serde::{Deserializer, Serializer, de};
-            use util::amount::serde::SerdeAmountForOpt;
-            use core::fmt;
-            use core::marker::PhantomData;
-
-            pub fn serialize<A: SerdeAmountForOpt, S: Serializer>(
-                a: &Option<A>,
-                s: S,
-            ) -> Result<S::Ok, S::Error> {
-                match *a {
-                    Some(a) => a.ser_sat_opt(s),
-                    None => s.serialize_none(),
-                }
-            }
-
-            pub fn deserialize<'d, A: SerdeAmountForOpt, D: Deserializer<'d>>(
-                d: D,
-            ) -> Result<Option<A>, D::Error> {
-                struct VisitOptAmt<X>(PhantomData<X>);
-
-                impl<'de, X: SerdeAmountForOpt> de::Visitor<'de> for VisitOptAmt<X> {
-                    type Value = Option<X>;
-
-                    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-                        write!(formatter, "An Option<{}64>", X::type_prefix())
-                    }
-
-                    fn visit_none<E>(self) -> Result<Self::Value, E>
-                    where
-                        E: de::Error,
-                    {
-                        Ok(None)
-                    }
-                    fn visit_some<D>(self, d: D) -> Result<Self::Value, D::Error>
-                    where
-                        D: Deserializer<'de>,
-                    {
-                        Ok(Some(X::des_sat(d)?))
-                    }
-                }
-                d.deserialize_option(VisitOptAmt::<A>(PhantomData))
-            }
-        }
-    }
-
-    pub mod as_btc {
-        //! Serialize and deserialize [`Amount`](crate::Amount) as JSON numbers denominated in BTC.
-        //! Use with `#[serde(with = "amount::serde::as_btc")]`.
-
-        use serde::{Deserializer, Serializer};
-        use util::amount::serde::SerdeAmount;
-
-        pub fn serialize<A: SerdeAmount, S: Serializer>(a: &A, s: S) -> Result<S::Ok, S::Error> {
-            a.ser_btc(s)
-        }
-
-        pub fn deserialize<'d, A: SerdeAmount, D: Deserializer<'d>>(d: D) -> Result<A, D::Error> {
-            A::des_btc(d)
-        }
-
-        pub mod opt {
-            //! Serialize and deserialize [Option<Amount>] as JSON numbers denominated in BTC.
-            //! Use with `#[serde(default, with = "amount::serde::as_btc::opt")]`.
-
-            use serde::{Deserializer, Serializer, de};
-            use util::amount::serde::SerdeAmountForOpt;
-            use core::fmt;
-            use core::marker::PhantomData;
-
-            pub fn serialize<A: SerdeAmountForOpt, S: Serializer>(
-                a: &Option<A>,
-                s: S,
-            ) -> Result<S::Ok, S::Error> {
-                match *a {
-                    Some(a) => a.ser_btc_opt(s),
-                    None => s.serialize_none(),
-                }
-            }
-
-            pub fn deserialize<'d, A: SerdeAmountForOpt, D: Deserializer<'d>>(
-                d: D,
-            ) -> Result<Option<A>, D::Error> {
-                struct VisitOptAmt<X>(PhantomData<X>);
-
-                impl<'de, X: SerdeAmountForOpt> de::Visitor<'de> for VisitOptAmt<X> {
-                    type Value = Option<X>;
-
-                    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-                        write!(formatter, "An Option<f64>")
-                    }
-
-                    fn visit_none<E>(self) -> Result<Self::Value, E>
-                    where
-                        E: de::Error,
-                    {
-                        Ok(None)
-                    }
-                    fn visit_some<D>(self, d: D) -> Result<Self::Value, D::Error>
-                    where
-                        D: Deserializer<'de>,
-                    {
-                        Ok(Some(X::des_btc(d)?))
-                    }
-                }
-                d.deserialize_option(VisitOptAmt::<A>(PhantomData))
-            }
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    #[cfg(feature = "std")]
-    use std::panic;
-    use core::str::FromStr;
-
-    #[cfg(feature = "serde")]
-    use serde_test;
-
-    #[test]
-    fn add_sub_mul_div() {
-        let sat = Amount::from_sat;
-        let ssat = SignedAmount::from_sat;
-
-        assert_eq!(sat(15) + sat(15), sat(30));
-        assert_eq!(sat(15) - sat(15), sat(0));
-        assert_eq!(sat(14) * 3, sat(42));
-        assert_eq!(sat(14) / 2, sat(7));
-        assert_eq!(sat(14) % 3, sat(2));
-        assert_eq!(ssat(15) - ssat(20), ssat(-5));
-        assert_eq!(ssat(-14) * 3, ssat(-42));
-        assert_eq!(ssat(-14) / 2, ssat(-7));
-        assert_eq!(ssat(-14) % 3, ssat(-2));
-
-        let mut b = ssat(-5);
-        b += ssat(13);
-        assert_eq!(b, ssat(8));
-        b -= ssat(3);
-        assert_eq!(b, ssat(5));
-        b *= 6;
-        assert_eq!(b, ssat(30));
-        b /= 3;
-        assert_eq!(b, ssat(10));
-        b %= 3;
-        assert_eq!(b, ssat(1));
-    }
-
-    #[cfg(feature = "std")]
-    #[test]
-    fn test_overflows() {
-        // panic on overflow
-        let result = panic::catch_unwind(|| Amount::max_value() + Amount::from_sat(1));
-        assert!(result.is_err());
-        let result = panic::catch_unwind(|| Amount::from_sat(8446744073709551615) * 3);
-        assert!(result.is_err());
-    }
-
-    #[test]
-    fn checked_arithmetic() {
-        let sat = Amount::from_sat;
-        let ssat = SignedAmount::from_sat;
-
-        assert_eq!(sat(42).checked_add(sat(1)), Some(sat(43)));
-        assert_eq!(SignedAmount::max_value().checked_add(ssat(1)), None);
-        assert_eq!(SignedAmount::min_value().checked_sub(ssat(1)), None);
-        assert_eq!(Amount::max_value().checked_add(sat(1)), None);
-        assert_eq!(Amount::min_value().checked_sub(sat(1)), None);
-
-        assert_eq!(sat(5).checked_sub(sat(3)), Some(sat(2)));
-        assert_eq!(sat(5).checked_sub(sat(6)), None);
-        assert_eq!(ssat(5).checked_sub(ssat(6)), Some(ssat(-1)));
-        assert_eq!(sat(5).checked_rem(2), Some(sat(1)));
-
-        assert_eq!(sat(5).checked_div(2), Some(sat(2))); // integer division
-        assert_eq!(ssat(-6).checked_div(2), Some(ssat(-3)));
-
-        assert_eq!(ssat(-5).positive_sub(ssat(3)), None);
-        assert_eq!(ssat(5).positive_sub(ssat(-3)), None);
-        assert_eq!(ssat(3).positive_sub(ssat(5)), None);
-        assert_eq!(ssat(3).positive_sub(ssat(3)), Some(ssat(0)));
-        assert_eq!(ssat(5).positive_sub(ssat(3)), Some(ssat(2)));
-    }
-
-    #[test]
-    fn floating_point() {
-        use super::Denomination as D;
-        let f = Amount::from_float_in;
-        let sf = SignedAmount::from_float_in;
-        let sat = Amount::from_sat;
-        let ssat = SignedAmount::from_sat;
-
-        assert_eq!(f(11.22, D::Bitcoin), Ok(sat(1122000000)));
-        assert_eq!(sf(-11.22, D::MilliBitcoin), Ok(ssat(-1122000)));
-        assert_eq!(f(11.22, D::Bit), Ok(sat(1122)));
-        assert_eq!(sf(-1000.0, D::MilliSatoshi), Ok(ssat(-1)));
-        assert_eq!(f(0.0001234, D::Bitcoin), Ok(sat(12340)));
-        assert_eq!(sf(-0.00012345, D::Bitcoin), Ok(ssat(-12345)));
-
-        assert_eq!(f(-100.0, D::MilliSatoshi), Err(ParseAmountError::Negative));
-        assert_eq!(f(11.22, D::Satoshi), Err(ParseAmountError::TooPrecise));
-        assert_eq!(sf(-100.0, D::MilliSatoshi), Err(ParseAmountError::TooPrecise));
-        assert_eq!(sf(-100.0, D::MilliSatoshi), Err(ParseAmountError::TooPrecise));
-        assert_eq!(f(42.123456781, D::Bitcoin), Err(ParseAmountError::TooPrecise));
-        assert_eq!(sf(-184467440738.0, D::Bitcoin), Err(ParseAmountError::TooBig));
-        assert_eq!(f(18446744073709551617.0, D::Satoshi), Err(ParseAmountError::TooBig));
-        assert_eq!(
-            f(SignedAmount::max_value().to_float_in(D::Satoshi) + 1.0, D::Satoshi),
-            Err(ParseAmountError::TooBig)
-        );
-        assert_eq!(
-            f(Amount::max_value().to_float_in(D::Satoshi) + 1.0, D::Satoshi),
-            Err(ParseAmountError::TooBig)
-        );
-
-        let btc = move |f| SignedAmount::from_btc(f).unwrap();
-        assert_eq!(btc(2.5).to_float_in(D::Bitcoin), 2.5);
-        assert_eq!(btc(-2.5).to_float_in(D::MilliBitcoin), -2500.0);
-        assert_eq!(btc(2.5).to_float_in(D::Satoshi), 250000000.0);
-        assert_eq!(btc(-2.5).to_float_in(D::MilliSatoshi), -250000000000.0);
-
-        let btc = move |f| Amount::from_btc(f).unwrap();
-        assert_eq!(&btc(0.0012).to_float_in(D::Bitcoin).to_string(), "0.0012")
-    }
-
-    #[test]
-    fn parsing() {
-        use super::ParseAmountError as E;
-        let btc = Denomination::Bitcoin;
-        let sat = Denomination::Satoshi;
-        let p = Amount::from_str_in;
-        let sp = SignedAmount::from_str_in;
-
-        assert_eq!(p("x", btc), Err(E::InvalidCharacter('x')));
-        assert_eq!(p("-", btc), Err(E::InvalidFormat));
-        assert_eq!(sp("-", btc), Err(E::InvalidFormat));
-        assert_eq!(p("-1.0x", btc), Err(E::InvalidCharacter('x')));
-        assert_eq!(p("0.0 ", btc), Err(ParseAmountError::InvalidCharacter(' ')));
-        assert_eq!(p("0.000.000", btc), Err(E::InvalidFormat));
-        let more_than_max = format!("1{}", Amount::max_value());
-        assert_eq!(p(&more_than_max, btc), Err(E::TooBig));
-        assert_eq!(p("0.000000042", btc), Err(E::TooPrecise));
-
-        assert_eq!(p("1", btc), Ok(Amount::from_sat(1_000_000_00)));
-        assert_eq!(sp("-.5", btc), Ok(SignedAmount::from_sat(-500_000_00)));
-        assert_eq!(p("1.1", btc), Ok(Amount::from_sat(1_100_000_00)));
-        assert_eq!(p("100", sat), Ok(Amount::from_sat(100)));
-        assert_eq!(p("55", sat), Ok(Amount::from_sat(55)));
-        assert_eq!(p("5500000000000000000", sat), Ok(Amount::from_sat(5_500_000_000_000_000_000)));
-        // Should this even pass?
-        assert_eq!(p("5500000000000000000.", sat), Ok(Amount::from_sat(5_500_000_000_000_000_000)));
-        assert_eq!(
-            p("12345678901.12345678", btc),
-            Ok(Amount::from_sat(12_345_678_901__123_456_78))
-        );
-
-        // make sure satoshi > i64::max_value() is checked.
-        let amount = Amount::from_sat(i64::max_value() as u64);
-        assert_eq!(Amount::from_str_in(&amount.to_string_in(sat), sat), Ok(amount));
-        assert_eq!(Amount::from_str_in(&(amount+Amount(1)).to_string_in(sat), sat), Err(E::TooBig));
-
-        assert_eq!(p("12.000", Denomination::MilliSatoshi), Err(E::TooPrecise));
-        // exactly 50 chars.
-        assert_eq!(p("100000000000000.0000000000000000000000000000000000", Denomination::Bitcoin), Err(E::TooBig));
-        // more than 50 chars.
-        assert_eq!(p("100000000000000.00000000000000000000000000000000000", Denomination::Bitcoin), Err(E::InputTooLarge));
-    }
-
-    #[test]
-    fn to_string() {
-        use super::Denomination as D;
-
-        assert_eq!(Amount::ONE_BTC.to_string_in(D::Bitcoin), "1.00000000");
-        assert_eq!(Amount::ONE_BTC.to_string_in(D::Satoshi), "100000000");
-        assert_eq!(Amount::ONE_SAT.to_string_in(D::Bitcoin), "0.00000001");
-        assert_eq!(SignedAmount::from_sat(-42).to_string_in(D::Bitcoin), "-0.00000042");
-
-        assert_eq!(Amount::ONE_BTC.to_string_with_denomination(D::Bitcoin), "1.00000000 BTC");
-        assert_eq!(Amount::ONE_SAT.to_string_with_denomination(D::MilliSatoshi), "1000 msat");
-        assert_eq!(
-            SignedAmount::ONE_BTC.to_string_with_denomination(D::Satoshi),
-            "100000000 satoshi"
-        );
-        assert_eq!(Amount::ONE_SAT.to_string_with_denomination(D::Bitcoin), "0.00000001 BTC");
-        assert_eq!(
-            SignedAmount::from_sat(-42).to_string_with_denomination(D::Bitcoin),
-            "-0.00000042 BTC"
-        );
-    }
-
-    #[test]
-    fn test_unsigned_signed_conversion() {
-        use super::ParseAmountError as E;
-        let sa = SignedAmount::from_sat;
-        let ua = Amount::from_sat;
-
-        assert_eq!(Amount::max_value().to_signed(), Err(E::TooBig));
-        assert_eq!(ua(i64::max_value() as u64).to_signed(),  Ok(sa(i64::max_value())));
-        assert_eq!(ua(0).to_signed(), Ok(sa(0)));
-        assert_eq!(ua(1).to_signed(), Ok( sa(1)));
-        assert_eq!(ua(1).to_signed(), Ok(sa(1)));
-        assert_eq!(ua(i64::max_value() as u64 + 1).to_signed(), Err(E::TooBig));
-
-        assert_eq!(sa(-1).to_unsigned(), Err(E::Negative));
-        assert_eq!(sa(i64::max_value()).to_unsigned(), Ok(ua(i64::max_value() as u64)));
-
-        assert_eq!(sa(0).to_unsigned().unwrap().to_signed(), Ok(sa(0)));
-        assert_eq!(sa(1).to_unsigned().unwrap().to_signed(), Ok(sa(1)));
-        assert_eq!(sa(i64::max_value()).to_unsigned().unwrap().to_signed(), Ok(sa(i64::max_value())));
-    }
-
-    #[test]
-    fn from_str() {
-        use super::ParseAmountError as E;
-        let p = Amount::from_str;
-        let sp = SignedAmount::from_str;
-
-        assert_eq!(p("x BTC"), Err(E::InvalidCharacter('x')));
-        assert_eq!(p("5 BTC BTC"), Err(E::InvalidFormat));
-        assert_eq!(p("5 5 BTC"), Err(E::InvalidFormat));
-
-        assert_eq!(p("5 BCH"), Err(E::UnknownDenomination("BCH".to_owned())));
-
-        assert_eq!(p("-1 BTC"), Err(E::Negative));
-        assert_eq!(p("-0.0 BTC"), Err(E::Negative));
-        assert_eq!(p("0.123456789 BTC"), Err(E::TooPrecise));
-        assert_eq!(sp("-0.1 satoshi"), Err(E::TooPrecise));
-        assert_eq!(p("0.123456 mBTC"), Err(E::TooPrecise));
-        assert_eq!(sp("-1.001 bits"), Err(E::TooPrecise));
-        assert_eq!(sp("-200000000000 BTC"), Err(E::TooBig));
-        assert_eq!(p("18446744073709551616 sat"), Err(E::TooBig));
-
-        assert_eq!(sp("0 msat"), Err(E::TooPrecise));
-        assert_eq!(sp("-0 msat"), Err(E::TooPrecise));
-        assert_eq!(sp("000 msat"), Err(E::TooPrecise));
-        assert_eq!(sp("-000 msat"), Err(E::TooPrecise));
-        assert_eq!(p("0 msat"), Err(E::TooPrecise));
-        assert_eq!(p("-0 msat"), Err(E::TooPrecise));
-        assert_eq!(p("000 msat"), Err(E::TooPrecise));
-        assert_eq!(p("-000 msat"), Err(E::TooPrecise));
-
-        assert_eq!(p(".5 bits"), Ok(Amount::from_sat(50)));
-        assert_eq!(sp("-.5 bits"), Ok(SignedAmount::from_sat(-50)));
-        assert_eq!(p("0.00253583 BTC"), Ok(Amount::from_sat(253583)));
-        assert_eq!(sp("-5 satoshi"), Ok(SignedAmount::from_sat(-5)));
-        assert_eq!(p("0.10000000 BTC"), Ok(Amount::from_sat(100_000_00)));
-        assert_eq!(sp("-100 bits"), Ok(SignedAmount::from_sat(-10_000)));
-    }
-
-    #[test]
-    fn to_from_string_in() {
-        use super::Denomination as D;
-        let ua_str = Amount::from_str_in;
-        let ua_sat = Amount::from_sat;
-        let sa_str = SignedAmount::from_str_in;
-        let sa_sat = SignedAmount::from_sat;
-
-        assert_eq!("0.50", Amount::from_sat(50).to_string_in(D::Bit));
-        assert_eq!("-0.50", SignedAmount::from_sat(-50).to_string_in(D::Bit));
-        assert_eq!("0.00253583", Amount::from_sat(253583).to_string_in(D::Bitcoin));
-        assert_eq!("-5", SignedAmount::from_sat(-5).to_string_in(D::Satoshi));
-        assert_eq!("0.10000000", Amount::from_sat(100_000_00).to_string_in(D::Bitcoin));
-        assert_eq!("-100.00", SignedAmount::from_sat(-10_000).to_string_in(D::Bit));
-        assert_eq!("2535830", Amount::from_sat(253583).to_string_in(D::NanoBitcoin));
-        assert_eq!("-100000", SignedAmount::from_sat(-10_000).to_string_in(D::NanoBitcoin));
-        assert_eq!("2535830000", Amount::from_sat(253583).to_string_in(D::PicoBitcoin));
-        assert_eq!("-100000000", SignedAmount::from_sat(-10_000).to_string_in(D::PicoBitcoin));
-
-
-
-        assert_eq!(ua_str(&ua_sat(0).to_string_in(D::Satoshi), D::Satoshi), Ok(ua_sat(0)));
-        assert_eq!(ua_str(&ua_sat(500).to_string_in(D::Bitcoin), D::Bitcoin), Ok(ua_sat(500)));
-        assert_eq!(ua_str(&ua_sat(21_000_000).to_string_in(D::Bit), D::Bit), Ok(ua_sat(21_000_000)));
-        assert_eq!(ua_str(&ua_sat(1).to_string_in(D::MicroBitcoin), D::MicroBitcoin), Ok(ua_sat(1)));
-        assert_eq!(ua_str(&ua_sat(1_000_000_000_000).to_string_in(D::MilliBitcoin), D::MilliBitcoin), Ok(ua_sat(1_000_000_000_000)));
-        assert_eq!(ua_str(&ua_sat(u64::max_value()).to_string_in(D::MilliBitcoin), D::MilliBitcoin),  Err(ParseAmountError::TooBig));
-
-        assert_eq!(sa_str(&sa_sat(-1).to_string_in(D::MicroBitcoin), D::MicroBitcoin), Ok(sa_sat(-1)));
-
-        assert_eq!(sa_str(&sa_sat(i64::max_value()).to_string_in(D::Satoshi), D::MicroBitcoin), Err(ParseAmountError::TooBig));
-        // Test an overflow bug in `abs()`
-        assert_eq!(sa_str(&sa_sat(i64::min_value()).to_string_in(D::Satoshi), D::MicroBitcoin), Err(ParseAmountError::TooBig));
-
-        assert_eq!(sa_str(&sa_sat(-1).to_string_in(D::NanoBitcoin), D::NanoBitcoin), Ok(sa_sat(-1)));
-        assert_eq!(sa_str(&sa_sat(i64::max_value()).to_string_in(D::Satoshi), D::NanoBitcoin), Err(ParseAmountError::TooPrecise));
-        assert_eq!(sa_str(&sa_sat(i64::min_value()).to_string_in(D::Satoshi), D::NanoBitcoin), Err(ParseAmountError::TooPrecise));
-
-        assert_eq!(sa_str(&sa_sat(-1).to_string_in(D::PicoBitcoin), D::PicoBitcoin), Ok(sa_sat(-1)));
-        assert_eq!(sa_str(&sa_sat(i64::max_value()).to_string_in(D::Satoshi), D::PicoBitcoin), Err(ParseAmountError::TooPrecise));
-        assert_eq!(sa_str(&sa_sat(i64::min_value()).to_string_in(D::Satoshi), D::PicoBitcoin), Err(ParseAmountError::TooPrecise));
-
-
-    }
-
-    #[test]
-    fn to_string_with_denomination_from_str_roundtrip() {
-        use super::Denomination as D;
-        let amt = Amount::from_sat(42);
-        let denom = Amount::to_string_with_denomination;
-        assert_eq!(Amount::from_str(&denom(amt, D::Bitcoin)), Ok(amt));
-        assert_eq!(Amount::from_str(&denom(amt, D::MilliBitcoin)), Ok(amt));
-        assert_eq!(Amount::from_str(&denom(amt, D::MicroBitcoin)), Ok(amt));
-        assert_eq!(Amount::from_str(&denom(amt, D::Bit)), Ok(amt));
-        assert_eq!(Amount::from_str(&denom(amt, D::Satoshi)), Ok(amt));
-        assert_eq!(Amount::from_str(&denom(amt, D::NanoBitcoin)), Ok(amt));
-        assert_eq!(Amount::from_str(&denom(amt, D::MilliSatoshi)), Ok(amt));
-        assert_eq!(Amount::from_str(&denom(amt, D::PicoBitcoin)), Ok(amt));
-
-        assert_eq!(Amount::from_str("42 satoshi BTC"), Err(ParseAmountError::InvalidFormat));
-        assert_eq!(SignedAmount::from_str("-42 satoshi BTC"), Err(ParseAmountError::InvalidFormat));
-    }
-
-    #[cfg(feature = "serde")]
-    #[test]
-    fn serde_as_sat() {
-
-        #[derive(Serialize, Deserialize, PartialEq, Debug)]
-        struct T {
-            #[serde(with = "::util::amount::serde::as_sat")]
-            pub amt: Amount,
-            #[serde(with = "::util::amount::serde::as_sat")]
-            pub samt: SignedAmount,
-        }
-
-        serde_test::assert_tokens(
-            &T {
-                amt: Amount::from_sat(123456789),
-                samt: SignedAmount::from_sat(-123456789),
-            },
-            &[
-                serde_test::Token::Struct { name: "T", len: 2 },
-                serde_test::Token::Str("amt"),
-                serde_test::Token::U64(123456789),
-                serde_test::Token::Str("samt"),
-                serde_test::Token::I64(-123456789),
-                serde_test::Token::StructEnd,
-            ],
-        );
-    }
-
-    #[cfg(feature = "serde")]
-    #[test]
-    fn serde_as_btc() {
-        use serde_json;
-
-        #[derive(Serialize, Deserialize, PartialEq, Debug)]
-        struct T {
-            #[serde(with = "::util::amount::serde::as_btc")]
-            pub amt: Amount,
-            #[serde(with = "::util::amount::serde::as_btc")]
-            pub samt: SignedAmount,
-        }
-
-        let orig = T {
-            amt: Amount::from_sat(21_000_000__000_000_01),
-            samt: SignedAmount::from_sat(-21_000_000__000_000_01),
-        };
-
-        let json = "{\"amt\": 21000000.00000001, \
-                    \"samt\": -21000000.00000001}";
-        let t: T = serde_json::from_str(&json).unwrap();
-        assert_eq!(t, orig);
-
-        let value: serde_json::Value = serde_json::from_str(&json).unwrap();
-        assert_eq!(t, serde_json::from_value(value).unwrap());
-
-        // errors
-        let t: Result<T, serde_json::Error> =
-            serde_json::from_str("{\"amt\": 1000000.000000001, \"samt\": 1}");
-        assert!(t.unwrap_err().to_string().contains(&ParseAmountError::TooPrecise.to_string()));
-        let t: Result<T, serde_json::Error> = serde_json::from_str("{\"amt\": -1, \"samt\": 1}");
-        assert!(t.unwrap_err().to_string().contains(&ParseAmountError::Negative.to_string()));
-    }
-
-    #[cfg(feature = "serde")]
-    #[test]
-    fn serde_as_btc_opt() {
-        use serde_json;
-
-        #[derive(Serialize, Deserialize, PartialEq, Debug, Eq)]
-        struct T {
-            #[serde(default, with = "::util::amount::serde::as_btc::opt")]
-            pub amt: Option<Amount>,
-            #[serde(default, with = "::util::amount::serde::as_btc::opt")]
-            pub samt: Option<SignedAmount>,
-        }
-
-        let with = T {
-            amt: Some(Amount::from_sat(2__500_000_00)),
-            samt: Some(SignedAmount::from_sat(-2__500_000_00)),
-        };
-        let without = T {
-            amt: None,
-            samt: None,
-        };
-
-        // Test Roundtripping
-        for s in [&with, &without].iter() {
-            let v = serde_json::to_string(s).unwrap();
-            let w : T = serde_json::from_str(&v).unwrap();
-            assert_eq!(w, **s);
-        }
-
-        let t: T = serde_json::from_str("{\"amt\": 2.5, \"samt\": -2.5}").unwrap();
-        assert_eq!(t, with);
-
-        let t: T = serde_json::from_str("{}").unwrap();
-        assert_eq!(t, without);
-
-        let value_with: serde_json::Value =
-            serde_json::from_str("{\"amt\": 2.5, \"samt\": -2.5}").unwrap();
-        assert_eq!(with, serde_json::from_value(value_with).unwrap());
-
-        let value_without: serde_json::Value = serde_json::from_str("{}").unwrap();
-        assert_eq!(without, serde_json::from_value(value_without).unwrap());
-    }
-
-    #[cfg(feature = "serde")]
-    #[test]
-    fn serde_as_sat_opt() {
-        use serde_json;
-
-        #[derive(Serialize, Deserialize, PartialEq, Debug, Eq)]
-        struct T {
-            #[serde(default, with = "::util::amount::serde::as_sat::opt")]
-            pub amt: Option<Amount>,
-            #[serde(default, with = "::util::amount::serde::as_sat::opt")]
-            pub samt: Option<SignedAmount>,
-        }
-
-        let with = T {
-            amt: Some(Amount::from_sat(2__500_000_00)),
-            samt: Some(SignedAmount::from_sat(-2__500_000_00)),
-        };
-        let without = T {
-            amt: None,
-            samt: None,
-        };
-
-        // Test Roundtripping
-        for s in [&with, &without].iter() {
-            let v = serde_json::to_string(s).unwrap();
-            let w : T = serde_json::from_str(&v).unwrap();
-            assert_eq!(w, **s);
-        }
-
-        let t: T = serde_json::from_str("{\"amt\": 250000000, \"samt\": -250000000}").unwrap();
-        assert_eq!(t, with);
-
-        let t: T = serde_json::from_str("{}").unwrap();
-        assert_eq!(t, without);
-
-        let value_with: serde_json::Value =
-            serde_json::from_str("{\"amt\": 250000000, \"samt\": -250000000}").unwrap();
-        assert_eq!(with, serde_json::from_value(value_with).unwrap());
-
-        let value_without: serde_json::Value = serde_json::from_str("{}").unwrap();
-        assert_eq!(without, serde_json::from_value(value_without).unwrap());
-    }
-
-    #[test]
-    fn sum_amounts() {
-        assert_eq!(Amount::from_sat(0), vec![].into_iter().sum::<Amount>());
-        assert_eq!(SignedAmount::from_sat(0), vec![].into_iter().sum::<SignedAmount>());
-
-        let amounts = vec![
-            Amount::from_sat(42),
-            Amount::from_sat(1337),
-            Amount::from_sat(21)
-        ];
-        let sum = amounts.into_iter().sum::<Amount>();
-        assert_eq!(Amount::from_sat(1400), sum);
-
-        let amounts = vec![
-            SignedAmount::from_sat(-42),
-            SignedAmount::from_sat(1337),
-            SignedAmount::from_sat(21)
-        ];
-        let sum = amounts.into_iter().sum::<SignedAmount>();
-        assert_eq!(SignedAmount::from_sat(1316), sum);
-    }
-
-    #[test]
-    fn checked_sum_amounts() {
-        assert_eq!(Some(Amount::from_sat(0)), vec![].into_iter().checked_sum());
-        assert_eq!(Some(SignedAmount::from_sat(0)), vec![].into_iter().checked_sum());
-
-        let amounts = vec![
-            Amount::from_sat(42),
-            Amount::from_sat(1337),
-            Amount::from_sat(21)
-        ];
-        let sum = amounts.into_iter().checked_sum();
-        assert_eq!(Some(Amount::from_sat(1400)), sum);
-
-        let amounts = vec![
-            Amount::from_sat(u64::max_value()),
-            Amount::from_sat(1337),
-            Amount::from_sat(21)
-        ];
-        let sum = amounts.into_iter().checked_sum();
-        assert_eq!(None, sum);
-
-        let amounts = vec![
-            SignedAmount::from_sat(i64::min_value()),
-            SignedAmount::from_sat(-1),
-            SignedAmount::from_sat(21)
-        ];
-        let sum = amounts.into_iter().checked_sum();
-        assert_eq!(None, sum);
-
-        let amounts = vec![
-            SignedAmount::from_sat(i64::max_value()),
-            SignedAmount::from_sat(1),
-            SignedAmount::from_sat(21)
-        ];
-        let sum = amounts.into_iter().checked_sum();
-        assert_eq!(None, sum);
-
-        let amounts = vec![
-            SignedAmount::from_sat(42),
-            SignedAmount::from_sat(3301),
-            SignedAmount::from_sat(21)
-        ];
-        let sum = amounts.into_iter().checked_sum();
-        assert_eq!(Some(SignedAmount::from_sat(3364)), sum);
-    }
-
-    #[test]
-    fn denomination_string_acceptable_forms() {
-        // Non-exhaustive list of valid forms.
-        let valid = vec!["BTC", "btc", "mBTC", "mbtc", "uBTC", "ubtc", "SATOSHI","Satoshi", "Satoshis", "satoshis", "SAT", "Sat", "sats", "bit", "bits", "nBTC", "pBTC"];
-        for denom in valid.iter() {
-            assert!(Denomination::from_str(denom).is_ok());
-        }
-    }
-
-    #[test]
-    fn disallow_confusing_forms() {
-        // Non-exhaustive list of confusing forms.
-        let confusing = vec!["Msat", "Msats", "MSAT", "MSATS", "MSat", "MSats", "MBTC", "Mbtc", "PBTC"];
-        for denom in confusing.iter() {
-            match  Denomination::from_str(denom) {
-                Ok(_) => panic!("from_str should error for {}", denom),
-                Err(ParseAmountError::PossiblyConfusingDenomination(_)) => {},
-                Err(e) => panic!("unexpected error: {}", e),
-            }
-        }
-    }
-
-    #[test]
-    fn disallow_unknown_denomination() {
-        // Non-exhaustive list of unknown forms.
-        let unknown = vec!["NBTC", "UBTC", "ABC", "abc"];
-        for denom in unknown.iter() {
-            match  Denomination::from_str(denom) {
-                Ok(_) => panic!("from_str should error for {}", denom),
-                Err(ParseAmountError::UnknownDenomination(_)) => {},
-                Err(e) => panic!("unexpected error: {}", e),
-            }
-        }
-    }
-}
-
diff --git a/src/util/bip158.rs b/src/util/bip158.rs
deleted file mode 100644
index 1705a1531..000000000
--- a/src/util/bip158.rs
+++ /dev/null
@@ -1,679 +0,0 @@
-// Rust Dash Library
-// Written in 2019 by
-//   The rust-bitcoin developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-// This module was largely copied from https://github.com/rust-bitcoin/murmel/blob/master/src/blockfilter.rs
-// on 11. June 2019 which is licensed under Apache, that file specifically
-// was written entirely by Tamas Blummer, who is re-licensing its contents here as CC0.
-
-//! BIP158 Compact Block Filters for light clients.
-//!
-//! This module implements a structure for compact filters on block data, for
-//! use in the BIP 157 light client protocol. The filter construction proposed
-//! is an alternative to Bloom filters, as used in BIP 37, that minimizes filter
-//! size by using Golomb-Rice coding for compression.
-//!
-//! ## Example
-//!
-//! ```ignore
-//! fn get_script_for_coin(coin: &OutPoint) -> Result<Script, BlockFilterError> {
-//!   // get utxo ...
-//! }
-//!
-//! // create a block filter for a block (server side)
-//! let filter = BlockFilter::new_script_filter(&block, get_script_for_coin)?;
-//!
-//! // or create a filter from known raw data
-//! let filter = BlockFilter::new(content);
-//!
-//! // read and evaluate a filter
-//!
-//! let query: Iterator<Item=Script> = // .. some scripts you care about
-//! if filter.match_any(&block_hash, &mut query.map(|s| s.as_bytes())) {
-//!   // get this block
-//! }
-//!  ```
-//!
-
-use prelude::*;
-
-use io::{self, Cursor};
-use core::fmt::{self, Display, Formatter};
-use core::cmp::{self, Ordering};
-
-use hashes::{Hash, siphash24};
-use hash_types::{BlockHash, FilterHash, FilterHeader};
-
-use blockdata::block::Block;
-use blockdata::script::Script;
-use blockdata::transaction::outpoint::OutPoint;
-use consensus::{Decodable, Encodable};
-use consensus::encode::VarInt;
-use util::endian;
-
-/// Golomb encoding parameter as in BIP-158, see also https://gist.github.com/sipa/576d5f09c3b86c3b1b75598d799fc845
-const P: u8 = 19;
-const M: u64 = 784931;
-
-/// Errors for blockfilter
-#[derive(Debug)]
-pub enum Error {
-    /// missing UTXO, can not calculate script filter
-    UtxoMissing(OutPoint),
-    /// some IO error reading or writing binary serialization of the filter
-    Io(io::Error),
-}
-
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl ::std::error::Error for Error {}
-
-impl Display for Error {
-    fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
-        match *self {
-            Error::UtxoMissing(ref coin) => write!(f, "unresolved UTXO {}", coin),
-            Error::Io(ref io) => write!(f, "{}", io)
-        }
-    }
-}
-
-impl From<io::Error> for Error {
-    fn from(io: io::Error) -> Self {
-        Error::Io(io)
-    }
-}
-
-
-/// a computed or read block filter
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct BlockFilter {
-    /// Golomb encoded filter
-    pub content: Vec<u8>
-}
-
-impl FilterHash {
-    /// compute the filter header from a filter hash and previous filter header
-    pub fn filter_header(&self, previous_filter_header: &FilterHeader) -> FilterHeader {
-        let mut header_data = [0u8; 64];
-        header_data[0..32].copy_from_slice(&self[..]);
-        header_data[32..64].copy_from_slice(&previous_filter_header[..]);
-        FilterHeader::hash(&header_data)
-    }
-}
-
-impl BlockFilter {
-    /// compute this filter's id in a chain of filters
-    pub fn filter_header(&self, previous_filter_header: &FilterHeader) -> FilterHeader {
-        let filter_hash = FilterHash::hash(self.content.as_slice());
-        filter_hash.filter_header(previous_filter_header)
-    }
-
-    /// create a new filter from pre-computed data
-    pub fn new (content: &[u8]) -> BlockFilter {
-        BlockFilter { content: content.to_vec() }
-    }
-
-    /// Compute a SCRIPT_FILTER that contains spent and output scripts
-    pub fn new_script_filter<M>(block: &Block, script_for_coin: M) -> Result<BlockFilter, Error>
-        where M: Fn(&OutPoint) -> Result<Script, Error> {
-        let mut out = Vec::new();
-        {
-            let mut writer = BlockFilterWriter::new(&mut out, block);
-            writer.add_output_scripts();
-            writer.add_input_scripts(script_for_coin)?;
-            writer.finish()?;
-        }
-        Ok(BlockFilter { content: out })
-    }
-
-    /// match any query pattern
-    pub fn match_any(&self, block_hash: &BlockHash, query: &mut dyn Iterator<Item=&[u8]>) -> Result<bool, Error> {
-        let filter_reader = BlockFilterReader::new(block_hash);
-        filter_reader.match_any(&mut Cursor::new(self.content.as_slice()), query)
-    }
-
-    /// match all query pattern
-    pub fn match_all(&self, block_hash: &BlockHash, query: &mut dyn Iterator<Item=&[u8]>) -> Result<bool, Error> {
-        let filter_reader = BlockFilterReader::new(block_hash);
-        filter_reader.match_all(&mut Cursor::new(self.content.as_slice()), query)
-    }
-}
-
-/// Compiles and writes a block filter
-pub struct BlockFilterWriter<'a> {
-    block: &'a Block,
-    writer: GCSFilterWriter<'a>,
-}
-
-impl<'a> BlockFilterWriter<'a> {
-    /// Create a block filter writer
-    pub fn new(writer: &'a mut dyn io::Write, block: &'a Block) -> BlockFilterWriter<'a> {
-        let block_hash_as_int = block.block_hash().into_inner();
-        let k0 = endian::slice_to_u64_le(&block_hash_as_int[0..8]);
-        let k1 = endian::slice_to_u64_le(&block_hash_as_int[8..16]);
-        let writer = GCSFilterWriter::new(writer, k0, k1, M, P);
-        BlockFilterWriter { block, writer }
-    }
-
-    /// Add output scripts of the block - excluding OP_RETURN scripts
-    pub fn add_output_scripts(&mut self) {
-        for transaction in &self.block.txdata {
-            for output in &transaction.output {
-                if !output.script_pubkey.is_op_return() {
-                    self.add_element(output.script_pubkey.as_bytes());
-                }
-            }
-        }
-    }
-
-    /// Add consumed output scripts of a block to filter
-    pub fn add_input_scripts<M>(&mut self, script_for_coin: M) -> Result<(), Error>
-        where M: Fn(&OutPoint) -> Result<Script, Error> {
-        for script in self.block.txdata.iter()
-            .skip(1) // skip coinbase
-            .flat_map(|t| t.input.iter().map(|i| &i.previous_output))
-            .map(script_for_coin) {
-            match script {
-                Ok(script) => self.add_element(script.as_bytes()),
-                Err(e) => return Err(e)
-            }
-        }
-        Ok(())
-    }
-
-    /// Add arbitrary element to a filter
-    pub fn add_element(&mut self, data: &[u8]) {
-        self.writer.add_element(data);
-    }
-
-    /// Write block filter
-    pub fn finish(&mut self) -> Result<usize, io::Error> {
-        self.writer.finish()
-    }
-}
-
-
-/// Reads and interpret a block filter
-pub struct BlockFilterReader {
-    reader: GCSFilterReader
-}
-
-impl BlockFilterReader {
-    /// Create a block filter reader
-    pub fn new(block_hash: &BlockHash) -> BlockFilterReader {
-        let block_hash_as_int = block_hash.into_inner();
-        let k0 = endian::slice_to_u64_le(&block_hash_as_int[0..8]);
-        let k1 = endian::slice_to_u64_le(&block_hash_as_int[8..16]);
-        BlockFilterReader { reader: GCSFilterReader::new(k0, k1, M, P) }
-    }
-
-    /// match any query pattern
-    pub fn match_any(&self, reader: &mut dyn io::Read, query: &mut dyn Iterator<Item=&[u8]>) -> Result<bool, Error> {
-        self.reader.match_any(reader, query)
-    }
-
-    /// match all query pattern
-    pub fn match_all(&self, reader: &mut dyn io::Read, query: &mut dyn Iterator<Item=&[u8]>) -> Result<bool, Error> {
-        self.reader.match_all(reader, query)
-    }
-}
-
-
-/// Golomb-Rice encoded filter reader
-pub struct GCSFilterReader {
-    filter: GCSFilter,
-    m: u64
-}
-
-impl GCSFilterReader {
-    /// Create a new filter reader with specific seed to siphash
-    pub fn new(k0: u64, k1: u64, m: u64, p: u8) -> GCSFilterReader {
-        GCSFilterReader { filter: GCSFilter::new(k0, k1, p), m }
-    }
-
-    /// match any query pattern
-    pub fn match_any(&self, reader: &mut dyn io::Read, query: &mut dyn Iterator<Item=&[u8]>) -> Result<bool, Error> {
-        let mut decoder = reader;
-        let n_elements: VarInt = Decodable::consensus_decode(&mut decoder).unwrap_or(VarInt(0));
-        let reader = &mut decoder;
-        // map hashes to [0, n_elements << grp]
-        let nm = n_elements.0 * self.m;
-        let mut mapped = query.map(|e| map_to_range(self.filter.hash(e), nm)).collect::<Vec<_>>();
-        // sort
-        mapped.sort_unstable();
-        if mapped.is_empty() {
-            return Ok(true);
-        }
-        if n_elements.0 == 0 {
-            return Ok(false);
-        }
-
-        // find first match in two sorted arrays in one read pass
-        let mut reader = BitStreamReader::new(reader);
-        let mut data = self.filter.golomb_rice_decode(&mut reader)?;
-        let mut remaining = n_elements.0 - 1;
-        for p in mapped {
-            loop {
-                match data.cmp(&p) {
-                    Ordering::Equal => return Ok(true),
-                    Ordering::Less => {
-                        if remaining > 0 {
-                            data += self.filter.golomb_rice_decode(&mut reader)?;
-                            remaining -= 1;
-                        } else {
-                            return Ok(false);
-                        }
-                    }
-                    Ordering::Greater => break,
-                }
-            }
-        }
-        Ok(false)
-    }
-
-    /// match all query pattern
-    pub fn match_all(&self, reader: &mut dyn io::Read, query: &mut dyn Iterator<Item=&[u8]>) -> Result<bool, Error> {
-        let mut decoder = reader;
-        let n_elements: VarInt = Decodable::consensus_decode(&mut decoder).unwrap_or(VarInt(0));
-        let reader = &mut decoder;
-        // map hashes to [0, n_elements << grp]
-        let nm = n_elements.0 * self.m;
-        let mut mapped = query.map(|e| map_to_range(self.filter.hash(e), nm)).collect::<Vec<_>>();
-        // sort
-        mapped.sort_unstable();
-        mapped.dedup();
-        if mapped.is_empty() {
-            return Ok(true);
-        }
-        if n_elements.0 == 0 {
-            return Ok(false);
-        }
-
-        // figure if all mapped are there in one read pass
-        let mut reader = BitStreamReader::new(reader);
-        let mut data = self.filter.golomb_rice_decode(&mut reader)?;
-        let mut remaining = n_elements.0 - 1;
-        for p in mapped {
-            loop {
-                match data.cmp(&p) {
-                    Ordering::Equal => break,
-                    Ordering::Less => {
-                        if remaining > 0 {
-                            data += self.filter.golomb_rice_decode(&mut reader)?;
-                            remaining -= 1;
-                        } else {
-                            return Ok(false);
-                        }
-                    },
-                    Ordering::Greater => return Ok(false),
-                }
-            }
-        }
-        Ok(true)
-    }
-}
-
-// fast reduction of hash to [0, nm) range
-fn map_to_range(hash: u64, nm: u64) -> u64 {
-    ((hash as u128 * nm as u128) >> 64) as u64
-}
-
-/// Colomb-Rice encoded filter writer
-pub struct GCSFilterWriter<'a> {
-    filter: GCSFilter,
-    writer: &'a mut dyn io::Write,
-    elements: HashSet<Vec<u8>>,
-    m: u64
-}
-
-impl<'a> GCSFilterWriter<'a> {
-    /// Create a new GCS writer wrapping a generic writer, with specific seed to siphash
-    pub fn new(writer: &'a mut dyn io::Write, k0: u64, k1: u64, m: u64, p: u8) -> GCSFilterWriter<'a> {
-        GCSFilterWriter {
-            filter: GCSFilter::new(k0, k1, p),
-            writer,
-            elements: HashSet::new(),
-            m
-        }
-    }
-
-    /// Add some data to the filter
-    pub fn add_element(&mut self, element: &[u8]) {
-        if !element.is_empty() {
-            self.elements.insert(element.to_vec());
-        }
-    }
-
-    /// write the filter to the wrapped writer
-    pub fn finish(&mut self) -> Result<usize, io::Error> {
-        let nm = self.elements.len() as u64 * self.m;
-
-        // map hashes to [0, n_elements * M)
-        let mut mapped: Vec<_> = self.elements.iter()
-            .map(|e| map_to_range(self.filter.hash(e.as_slice()), nm)).collect();
-        mapped.sort_unstable();
-
-        // write number of elements as varint
-        let mut encoder = Vec::new();
-        VarInt(mapped.len() as u64).consensus_encode(&mut encoder).expect("in-memory writers don't error");
-        let mut wrote = self.writer.write(encoder.as_slice())?;
-
-        // write out deltas of sorted values into a Golonb-Rice coded bit stream
-        let mut writer = BitStreamWriter::new(self.writer);
-        let mut last = 0;
-        for data in mapped {
-            wrote += self.filter.golomb_rice_encode(&mut writer, data - last)?;
-            last = data;
-        }
-        wrote += writer.flush()?;
-        Ok(wrote)
-    }
-}
-
-/// Golomb Coded Set Filter
-struct GCSFilter {
-    k0: u64, // sip hash key
-    k1: u64, // sip hash key
-    p: u8
-}
-
-impl GCSFilter {
-    /// Create a new filter
-    fn new(k0: u64, k1: u64, p: u8) -> GCSFilter {
-        GCSFilter { k0, k1, p }
-    }
-
-    /// Golomb-Rice encode a number n to a bit stream (Parameter 2^k)
-    fn golomb_rice_encode(&self, writer: &mut BitStreamWriter, n: u64) -> Result<usize, io::Error> {
-        let mut wrote = 0;
-        let mut q = n >> self.p;
-        while q > 0 {
-            let nbits = cmp::min(q, 64);
-            wrote += writer.write(!0u64, nbits as u8)?;
-            q -= nbits;
-        }
-        wrote += writer.write(0, 1)?;
-        wrote += writer.write(n, self.p)?;
-        Ok(wrote)
-    }
-
-    /// Golomb-Rice decode a number from a bit stream (Parameter 2^k)
-    fn golomb_rice_decode(&self, reader: &mut BitStreamReader) -> Result<u64, io::Error> {
-        let mut q = 0u64;
-        while reader.read(1)? == 1 {
-            q += 1;
-        }
-        let r = reader.read(self.p)?;
-        Ok((q << self.p) + r)
-    }
-
-    /// Hash an arbitrary slice with siphash using parameters of this filter
-    fn hash(&self, element: &[u8]) -> u64 {
-        siphash24::Hash::hash_to_u64_with_keys(self.k0, self.k1, element)
-    }
-}
-
-/// Bitwise stream reader
-pub struct BitStreamReader<'a> {
-    buffer: [u8; 1],
-    offset: u8,
-    reader: &'a mut dyn io::Read,
-}
-
-impl<'a> BitStreamReader<'a> {
-    /// Create a new BitStreamReader that reads bitwise from a given reader
-    pub fn new(reader: &'a mut dyn io::Read) -> BitStreamReader {
-        BitStreamReader {
-            buffer: [0u8],
-            reader,
-            offset: 8,
-        }
-    }
-
-    /// Read nbit bits
-    pub fn read(&mut self, mut nbits: u8) -> Result<u64, io::Error> {
-        if nbits > 64 {
-            return Err(io::Error::new(io::ErrorKind::Other, "can not read more than 64 bits at once"));
-        }
-        let mut data = 0u64;
-        while nbits > 0 {
-            if self.offset == 8 {
-                self.reader.read_exact(&mut self.buffer)?;
-                self.offset = 0;
-            }
-            let bits = cmp::min(8 - self.offset, nbits);
-            data <<= bits;
-            data |= ((self.buffer[0] << self.offset) >> (8 - bits)) as u64;
-            self.offset += bits;
-            nbits -= bits;
-        }
-        Ok(data)
-    }
-}
-
-/// Bitwise stream writer
-pub struct BitStreamWriter<'a> {
-    buffer: [u8; 1],
-    offset: u8,
-    writer: &'a mut dyn io::Write,
-}
-
-impl<'a> BitStreamWriter<'a> {
-    /// Create a new BitStreamWriter that writes bitwise to a given writer
-    pub fn new(writer: &'a mut dyn io::Write) -> BitStreamWriter {
-        BitStreamWriter {
-            buffer: [0u8],
-            writer,
-            offset: 0,
-        }
-    }
-
-    /// Write nbits bits from data
-    pub fn write(&mut self, data: u64, mut nbits: u8) -> Result<usize, io::Error> {
-        if nbits > 64 {
-            return Err(io::Error::new(io::ErrorKind::Other, "can not write more than 64 bits at once"));
-        }
-        let mut wrote = 0;
-        while nbits > 0 {
-            let bits = cmp::min(8 - self.offset, nbits);
-            self.buffer[0] |= ((data << (64 - nbits)) >> (64 - 8 + self.offset)) as u8;
-            self.offset += bits;
-            nbits -= bits;
-            if self.offset == 8 {
-                wrote += self.flush()?;
-            }
-        }
-        Ok(wrote)
-    }
-
-    /// flush bits not yet written
-    pub fn flush(&mut self) -> Result<usize, io::Error> {
-        if self.offset > 0 {
-            self.writer.write_all(&self.buffer)?;
-            self.buffer[0] = 0u8;
-            self.offset = 0;
-            Ok(1)
-        } else {
-            Ok(0)
-        }
-    }
-}
-
-#[cfg(test)]
-mod test {
-    use io::Cursor;
-
-    use hash_types::BlockHash;
-    use hashes::hex::FromHex;
-
-    use super::*;
-
-    extern crate serde_json;
-    use self::serde_json::Value;
-
-    use consensus::encode::deserialize;
-    use std::collections::HashMap;
-
-    #[test]
-    fn test_blockfilters() {
-
-        // test vectors from: https://github.com/jimpo/bitcoin/blob/c7efb652f3543b001b4dd22186a354605b14f47e/src/test/data/blockfilters.json
-        let data = include_str!("../../test_data/blockfilters.json");
-
-        let testdata = serde_json::from_str::<Value>(data).unwrap().as_array().unwrap().clone();
-        for t in testdata.iter().skip(1) {
-            let block_hash = BlockHash::from_hex(&t.get(1).unwrap().as_str().unwrap()).unwrap();
-            let block: Block = deserialize(&Vec::from_hex(&t.get(2).unwrap().as_str().unwrap()).unwrap()).unwrap();
-            assert_eq!(block.block_hash(), block_hash);
-            let scripts = t.get(3).unwrap().as_array().unwrap();
-            let previous_filter_header = FilterHeader::from_hex(&t.get(4).unwrap().as_str().unwrap()).unwrap();
-            let filter_content = Vec::from_hex(&t.get(5).unwrap().as_str().unwrap()).unwrap();
-            let filter_header = FilterHeader::from_hex(&t.get(6).unwrap().as_str().unwrap()).unwrap();
-
-            let mut txmap = HashMap::new();
-            let mut si = scripts.iter();
-            for tx in block.txdata.iter().skip(1) {
-                for input in tx.input.iter() {
-                    txmap.insert(input.previous_output.clone(), Script::from(Vec::from_hex(si.next().unwrap().as_str().unwrap()).unwrap()));
-                }
-            }
-
-            let filter = BlockFilter::new_script_filter(&block,
-                                        |o| if let Some(s) = txmap.get(o) {
-                                            Ok(s.clone())
-                                        } else {
-                                            Err(Error::UtxoMissing(o.clone()))
-                                        }).unwrap();
-
-            let test_filter = BlockFilter::new(filter_content.as_slice());
-
-            assert_eq!(test_filter.content, filter.content);
-
-            let block_hash = &block.block_hash();
-            assert!(filter.match_all(block_hash, &mut txmap.iter()
-                .filter_map(|(_, s)| if !s.is_empty() { Some(s.as_bytes()) } else { None })).unwrap());
-
-            for (_, script) in &txmap {
-                let query = vec![script];
-                if !script.is_empty () {
-                    assert!(filter.match_any(&block_hash, &mut query.iter()
-                        .map(|s| s.as_bytes())).unwrap());
-                }
-            }
-
-            assert_eq!(filter_header, filter.filter_header(&previous_filter_header));
-        }
-    }
-
-    #[test]
-    fn test_filter() {
-        let mut patterns = HashSet::new();
-
-        patterns.insert(Vec::from_hex("000000").unwrap());
-        patterns.insert(Vec::from_hex("111111").unwrap());
-        patterns.insert(Vec::from_hex("222222").unwrap());
-        patterns.insert(Vec::from_hex("333333").unwrap());
-        patterns.insert(Vec::from_hex("444444").unwrap());
-        patterns.insert(Vec::from_hex("555555").unwrap());
-        patterns.insert(Vec::from_hex("666666").unwrap());
-        patterns.insert(Vec::from_hex("777777").unwrap());
-        patterns.insert(Vec::from_hex("888888").unwrap());
-        patterns.insert(Vec::from_hex("999999").unwrap());
-        patterns.insert(Vec::from_hex("aaaaaa").unwrap());
-        patterns.insert(Vec::from_hex("bbbbbb").unwrap());
-        patterns.insert(Vec::from_hex("cccccc").unwrap());
-        patterns.insert(Vec::from_hex("dddddd").unwrap());
-        patterns.insert(Vec::from_hex("eeeeee").unwrap());
-        patterns.insert(Vec::from_hex("ffffff").unwrap());
-
-        let mut out = Vec::new();
-        {
-            let mut writer = GCSFilterWriter::new(&mut out, 0, 0, M, P);
-            for p in &patterns {
-                writer.add_element(p.as_slice());
-            }
-            writer.finish().unwrap();
-        }
-
-        let bytes = out;
-
-        {
-            let mut query = Vec::new();
-            query.push(Vec::from_hex("abcdef").unwrap());
-            query.push(Vec::from_hex("eeeeee").unwrap());
-
-            let reader = GCSFilterReader::new(0, 0, M, P);
-            let mut input = Cursor::new(bytes.clone());
-            assert!(reader.match_any(&mut input, &mut query.iter().map(|v| v.as_slice())).unwrap());
-        }
-        {
-            let mut query = Vec::new();
-            query.push(Vec::from_hex("abcdef").unwrap());
-            query.push(Vec::from_hex("123456").unwrap());
-
-            let reader = GCSFilterReader::new(0, 0, M, P);
-            let mut input = Cursor::new(bytes.clone());
-            assert!(!reader.match_any(&mut input, &mut query.iter().map(|v| v.as_slice())).unwrap());
-        }
-        {
-            let reader = GCSFilterReader::new(0, 0, M, P);
-            let mut query = Vec::new();
-            for p in &patterns {
-                query.push(p.clone());
-            }
-            let mut input = Cursor::new(bytes.clone());
-            assert!(reader.match_all(&mut input, &mut query.iter().map(|v| v.as_slice())).unwrap());
-        }
-        {
-            let reader = GCSFilterReader::new(0, 0, M, P);
-            let mut query = Vec::new();
-            for p in &patterns {
-                query.push(p.clone());
-            }
-            query.push(Vec::from_hex("abcdef").unwrap());
-            let mut input = Cursor::new(bytes.clone());
-            assert!(!reader.match_all(&mut input, &mut query.iter().map(|v| v.as_slice())).unwrap());
-        }
-    }
-
-    #[test]
-    fn test_bit_stream() {
-        let mut out = Vec::new();
-        {
-            let mut writer = BitStreamWriter::new(&mut out);
-            writer.write(0, 1).unwrap(); // 0
-            writer.write(2, 2).unwrap(); // 10
-            writer.write(6, 3).unwrap(); // 110
-            writer.write(11, 4).unwrap(); // 1011
-            writer.write(1, 5).unwrap(); // 00001
-            writer.write(32, 6).unwrap(); // 100000
-            writer.write(7, 7).unwrap(); // 0000111
-            writer.flush().unwrap();
-        }
-        let bytes = out;
-        assert_eq!("01011010110000110000000001110000", format!("{:08b}{:08b}{:08b}{:08b}", bytes[0], bytes[1], bytes[2], bytes[3]));
-        {
-            let mut input = Cursor::new(bytes);
-            let mut reader = BitStreamReader::new(&mut input);
-            assert_eq!(reader.read(1).unwrap(), 0);
-            assert_eq!(reader.read(2).unwrap(), 2);
-            assert_eq!(reader.read(3).unwrap(), 6);
-            assert_eq!(reader.read(4).unwrap(), 11);
-            assert_eq!(reader.read(5).unwrap(), 1);
-            assert_eq!(reader.read(6).unwrap(), 32);
-            assert_eq!(reader.read(7).unwrap(), 7);
-            // 4 bits remained
-            assert!(reader.read(5).is_err());
-        }
-    }
-}
diff --git a/src/util/ecdsa.rs b/src/util/ecdsa.rs
deleted file mode 100644
index 716ebfdb7..000000000
--- a/src/util/ecdsa.rs
+++ /dev/null
@@ -1,138 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! ECDSA Bitcoin signatures.
-//!
-//! This module provides ECDSA signatures used Bitcoin that can be roundtrip (de)serialized.
-
-use prelude::*;
-use core::str::FromStr;
-use core::{fmt, iter};
-use hashes::hex::{self, FromHex};
-use secp256k1;
-use blockdata::transaction::hash_type::{EcdsaSighashType, NonStandardSighashType};
-
-/// An ECDSA signature with the corresponding hash type.
-#[derive(Debug, Copy, Clone, PartialEq, Eq)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct EcdsaSig {
-    /// The underlying ECDSA Signature
-    pub sig: secp256k1::ecdsa::Signature,
-    /// The corresponding hash type
-    pub hash_ty: EcdsaSighashType,
-}
-
-impl EcdsaSig {
-    /// Constructs ECDSA dash signature for [`EcdsaSighashType::All`]
-    pub fn sighash_all(sig: secp256k1::ecdsa::Signature) -> EcdsaSig {
-        EcdsaSig {
-            sig,
-            hash_ty: EcdsaSighashType::All
-        }
-    }
-
-    /// Deserialize from slice following the standardness rules for [`EcdsaSighashType`]
-    pub fn from_slice(sl: &[u8]) -> Result<Self, EcdsaSigError> {
-        let (hash_ty, sig) = sl.split_last()
-            .ok_or(EcdsaSigError::EmptySignature)?;
-        let hash_ty = EcdsaSighashType::from_standard(*hash_ty as u32)
-            .map_err(|_| EcdsaSigError::NonStandardSighashType(*hash_ty as u32))?;
-        let sig = secp256k1::ecdsa::Signature::from_der(sig)
-            .map_err(EcdsaSigError::Secp256k1)?;
-        Ok(EcdsaSig { sig, hash_ty })
-    }
-
-    /// Serialize EcdsaSig
-    pub fn to_vec(&self) -> Vec<u8> {
-        // TODO: add support to serialize to a writer to SerializedSig
-        self.sig.serialize_der()
-            .iter().map(|x| *x)
-            .chain(iter::once(self.hash_ty as u8))
-            .collect()
-    }
-}
-
-impl fmt::Display for EcdsaSig {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        hex::format_hex(&self.sig.serialize_der(), f)?;
-        hex::format_hex(&[self.hash_ty as u8], f)
-    }
-}
-
-impl FromStr for EcdsaSig {
-    type Err = EcdsaSigError;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let bytes = Vec::from_hex(s)?;
-        let (sighash_byte, signature) = bytes.split_last()
-            .ok_or(EcdsaSigError::EmptySignature)?;
-        Ok(EcdsaSig {
-            sig: secp256k1::ecdsa::Signature::from_der(signature)?,
-            hash_ty: EcdsaSighashType::from_standard(*sighash_byte as u32)?
-        })
-    }
-}
-
-/// A key-related error.
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-pub enum EcdsaSigError {
-    /// Hex encoding error
-    HexEncoding(hex::Error),
-    /// Base58 encoding error
-    NonStandardSighashType(u32),
-    /// Empty Signature
-    EmptySignature,
-    /// secp256k1-related error
-    Secp256k1(secp256k1::Error),
-}
-
-
-impl fmt::Display for EcdsaSigError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            EcdsaSigError::NonStandardSighashType(hash_ty) =>
-                write!(f, "Non standard signature hash type {}", hash_ty),
-            EcdsaSigError::Secp256k1(ref e) =>
-                write!(f, "Invalid Ecdsa signature: {}", e),
-            EcdsaSigError::EmptySignature =>
-                write!(f, "Empty ECDSA signature"),
-            EcdsaSigError::HexEncoding(e) => write!(f, "EcdsaSig hex encoding error: {}", e)
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl ::std::error::Error for EcdsaSigError {}
-
-impl From<secp256k1::Error> for EcdsaSigError {
-    fn from(e: secp256k1::Error) -> EcdsaSigError {
-        EcdsaSigError::Secp256k1(e)
-    }
-}
-
-impl From<NonStandardSighashType> for EcdsaSigError {
-    fn from(err: NonStandardSighashType) -> Self {
-        EcdsaSigError::NonStandardSighashType(err.0)
-    }
-}
-
-impl From<hex::Error> for EcdsaSigError {
-    fn from(err: hex::Error) -> Self {
-        EcdsaSigError::HexEncoding(err)
-    }
-}
diff --git a/src/util/endian.rs b/src/util/endian.rs
deleted file mode 100644
index 65324da70..000000000
--- a/src/util/endian.rs
+++ /dev/null
@@ -1,130 +0,0 @@
-macro_rules! define_slice_to_be {
-    ($name: ident, $type: ty) => {
-        #[inline]
-        pub fn $name(slice: &[u8]) -> $type {
-            assert_eq!(slice.len(), ::core::mem::size_of::<$type>());
-            let mut res = 0;
-            for i in 0..::core::mem::size_of::<$type>() {
-                res |= (slice[i] as $type) << (::core::mem::size_of::<$type>() - i - 1)*8;
-            }
-            res
-        }
-    }
-}
-macro_rules! define_slice_to_le {
-    ($name: ident, $type: ty) => {
-        #[inline]
-        pub fn $name(slice: &[u8]) -> $type {
-            assert_eq!(slice.len(), ::core::mem::size_of::<$type>());
-            let mut res = 0;
-            for i in 0..::core::mem::size_of::<$type>() {
-                res |= (slice[i] as $type) << i*8;
-            }
-            res
-        }
-    }
-}
-macro_rules! define_be_to_array {
-    ($name: ident, $type: ty, $byte_len: expr) => {
-        #[inline]
-        pub fn $name(val: $type) -> [u8; $byte_len] {
-            debug_assert_eq!(::core::mem::size_of::<$type>(), $byte_len); // size_of isn't a constfn in 1.22
-            let mut res = [0; $byte_len];
-            for i in 0..$byte_len {
-                res[i] = ((val >> ($byte_len - i - 1)*8) & 0xff) as u8;
-            }
-            res
-        }
-    }
-}
-macro_rules! define_le_to_array {
-    ($name: ident, $type: ty, $byte_len: expr) => {
-        #[inline]
-        pub fn $name(val: $type) -> [u8; $byte_len] {
-            debug_assert_eq!(::core::mem::size_of::<$type>(), $byte_len); // size_of isn't a constfn in 1.22
-            let mut res = [0; $byte_len];
-            for i in 0..$byte_len {
-                res[i] = ((val >> i*8) & 0xff) as u8;
-            }
-            res
-        }
-    }
-}
-
-define_slice_to_be!(slice_to_u32_be, u32);
-define_slice_to_be!(slice_to_u64_be, u64);
-define_be_to_array!(u32_to_array_be, u32, 4);
-define_be_to_array!(u64_to_array_be, u64, 8);
-define_slice_to_le!(slice_to_u16_le, u16);
-define_slice_to_le!(slice_to_u32_le, u32);
-define_slice_to_le!(slice_to_u64_le, u64);
-define_slice_to_le!(slice_to_u128_le, u128);
-define_le_to_array!(u16_to_array_le, u16, 2);
-define_le_to_array!(u32_to_array_le, u32, 4);
-define_le_to_array!(u64_to_array_le, u64, 8);
-define_le_to_array!(u128_to_array_le, u128, 16);
-
-#[inline]
-pub fn i16_to_array_le(val: i16) -> [u8; 2] {
-    u16_to_array_le(val as u16)
-}
-#[inline]
-pub fn slice_to_i16_le(slice: &[u8]) -> i16 {
-    slice_to_u16_le(slice) as i16
-}
-#[inline]
-pub fn slice_to_i32_le(slice: &[u8]) -> i32 {
-    slice_to_u32_le(slice) as i32
-}
-#[inline]
-pub fn i32_to_array_le(val: i32) -> [u8; 4] {
-    u32_to_array_le(val as u32)
-}
-#[inline]
-pub fn slice_to_i64_le(slice: &[u8]) -> i64 {
-    slice_to_u64_le(slice) as i64
-}
-#[inline]
-pub fn i64_to_array_le(val: i64) -> [u8; 8] {
-    u64_to_array_le(val as u64)
-}
-
-macro_rules! define_chunk_slice_to_int {
-    ($name: ident, $type: ty, $converter: ident) => {
-        #[inline]
-        pub fn $name(inp: &[u8], outp: &mut [$type]) {
-            assert_eq!(inp.len(), outp.len() * ::core::mem::size_of::<$type>());
-            for (outp_val, data_bytes) in outp.iter_mut().zip(inp.chunks(::core::mem::size_of::<$type>())) {
-                *outp_val = $converter(data_bytes);
-            }
-        }
-    }
-}
-define_chunk_slice_to_int!(bytes_to_u64_slice_le, u64, slice_to_u64_le);
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn endianness_test() {
-        assert_eq!(slice_to_u32_be(&[0xde, 0xad, 0xbe, 0xef]), 0xdeadbeef);
-        assert_eq!(slice_to_u64_be(&[0xde, 0xad, 0xbe, 0xef, 0x1b, 0xad, 0xca, 0xfe]), 0xdeadbeef1badcafe);
-        assert_eq!(u32_to_array_be(0xdeadbeef), [0xde, 0xad, 0xbe, 0xef]);
-
-        assert_eq!(slice_to_u16_le(&[0xad, 0xde]), 0xdead);
-        assert_eq!(slice_to_u32_le(&[0xef, 0xbe, 0xad, 0xde]), 0xdeadbeef);
-        assert_eq!(slice_to_u64_le(&[0xef, 0xbe, 0xad, 0xde, 0xfe, 0xca, 0xad, 0x1b]), 0x1badcafedeadbeef);
-        assert_eq!(u16_to_array_le(0xdead), [0xad, 0xde]);
-        assert_eq!(u32_to_array_le(0xdeadbeef), [0xef, 0xbe, 0xad, 0xde]);
-        assert_eq!(u64_to_array_le(0x1badcafedeadbeef), [0xef, 0xbe, 0xad, 0xde, 0xfe, 0xca, 0xad, 0x1b]);
-    }
-
-    #[test]
-    fn endian_chunk_test() {
-        let inp = [0xef, 0xbe, 0xad, 0xde, 0xfe, 0xca, 0xad, 0x1b, 0xfe, 0xca, 0xad, 0x1b, 0xce, 0xfa, 0x01, 0x02];
-        let mut out = [0; 2];
-        bytes_to_u64_slice_le(&inp, &mut out);
-        assert_eq!(out, [0x1badcafedeadbeef, 0x0201face1badcafe]);
-    }
-}
diff --git a/src/util/key.rs b/src/util/key.rs
deleted file mode 100644
index ba1482bed..000000000
--- a/src/util/key.rs
+++ /dev/null
@@ -1,644 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Dash keys.
-//!
-//! This module provides keys used in Dash that can be roundtrip
-//! (de)serialized.
-
-pub use secp256k1::{XOnlyPublicKey, KeyPair};
-
-use prelude::*;
-
-use core::{ops, str::FromStr};
-use core::fmt::{self, Write};
-use io;
-#[cfg(feature = "std")] use std::error;
-
-use secp256k1::{self, Secp256k1};
-use network::constants::Network;
-use hashes::{Hash, hash160, hex, hex::FromHex};
-use hash_types::{PubkeyHash, WPubkeyHash};
-use util::base58;
-
-/// A key-related error.
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-pub enum Error {
-    /// Base58 encoding error
-    Base58(base58::Error),
-    /// secp256k1-related error
-    Secp256k1(secp256k1::Error),
-    /// Invalid key prefix error
-    InvalidKeyPrefix(u8),
-    /// Hex decoding error
-    Hex(hex::Error)
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            Error::Base58(ref e) => write!(f, "Key base58 error: {}", e),
-            Error::Secp256k1(ref e) => write!(f, "Key secp256k1 error: {}", e),
-            Error::InvalidKeyPrefix(ref e) => write!(f, "Key prefix invalid: {}", e),
-            Error::Hex(ref e) => write!(f, "Key hex decoding error: {}", e)
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl ::std::error::Error for Error {
-    fn cause(&self) -> Option<&dyn error::Error> {
-        match *self {
-            Error::Base58(ref e) => Some(e),
-            Error::Secp256k1(ref e) => Some(e),
-            Error::InvalidKeyPrefix(_) => None,
-            Error::Hex(ref e) => Some(e)
-        }
-    }
-}
-
-#[doc(hidden)]
-impl From<base58::Error> for Error {
-    fn from(e: base58::Error) -> Error {
-        Error::Base58(e)
-    }
-}
-
-#[doc(hidden)]
-impl From<secp256k1::Error> for Error {
-    fn from(e: secp256k1::Error) -> Error {
-        Error::Secp256k1(e)
-    }
-}
-
-#[doc(hidden)]
-impl From<hex::Error> for Error {
-    fn from(e: hex::Error) -> Self {
-        Error::Hex(e)
-    }
-}
-
-
-/// A Bitcoin ECDSA public key
-#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub struct PublicKey {
-    /// Whether this public key should be serialized as compressed
-    pub compressed: bool,
-    /// The actual ECDSA key
-    pub inner: secp256k1::PublicKey,
-}
-
-impl PublicKey {
-    /// Constructs compressed ECDSA public key from the provided generic Secp256k1 public key
-    pub fn new(key: secp256k1::PublicKey) -> PublicKey {
-        PublicKey {
-            compressed: true,
-            inner: key,
-        }
-    }
-
-    /// Constructs uncompressed (legacy) ECDSA public key from the provided generic Secp256k1
-    /// public key
-    pub fn new_uncompressed(key: secp256k1::PublicKey) -> PublicKey {
-        PublicKey {
-            compressed: false,
-            inner: key,
-        }
-    }
-
-    /// Returns bitcoin 160-bit hash of the public key
-    pub fn pubkey_hash(&self) -> PubkeyHash {
-        if self.compressed {
-            PubkeyHash::hash(&self.inner.serialize())
-        } else {
-            PubkeyHash::hash(&self.inner.serialize_uncompressed())
-        }
-    }
-
-    /// Returns bitcoin 160-bit hash of the public key for witness program
-    pub fn wpubkey_hash(&self) -> Option<WPubkeyHash> {
-        if self.compressed {
-            Some(WPubkeyHash::from_inner(
-                hash160::Hash::hash(&self.inner.serialize()).into_inner()
-            ))
-        } else {
-            // We can't create witness pubkey hashes for an uncompressed
-            // public keys
-            None
-        }
-    }
-
-    /// Write the public key into a writer
-    pub fn write_into<W: io::Write>(&self, mut writer: W) -> Result<(), io::Error> {
-        if self.compressed {
-            writer.write_all(&self.inner.serialize())
-        } else {
-            writer.write_all(&self.inner.serialize_uncompressed())
-        }
-    }
-
-    /// Read the public key from a reader
-    ///
-    /// This internally reads the first byte before reading the rest, so
-    /// use of a `BufReader` is recommended.
-    pub fn read_from<R: io::Read>(mut reader: R) -> Result<Self, io::Error> {
-        let mut bytes = [0; 65];
-
-        reader.read_exact(&mut bytes[0..1])?;
-        let bytes = if bytes[0] < 4 { &mut bytes[..33] } else { &mut bytes[..65] };
-
-        reader.read_exact(&mut bytes[1..])?;
-        Self::from_slice(bytes).map_err(|e| {
-            // Need a static string for core2
-            #[cfg(feature = "std")]
-            let reason = e;
-            #[cfg(not(feature = "std"))]
-            let reason = match e {
-                Error::Base58(_) => "base58 error",
-                Error::Secp256k1(_) => "secp256k1 error",
-                Error::InvalidKeyPrefix(_) => "invalid key prefix",
-                Error::Hex(_) => "hex decoding error"
-            };
-            io::Error::new(io::ErrorKind::InvalidData, reason)
-        })
-    }
-
-    /// Serialize the public key to bytes
-    pub fn to_bytes(&self) -> Vec<u8> {
-        let mut buf = Vec::new();
-        self.write_into(&mut buf).expect("vecs don't error");
-        buf
-    }
-
-    /// Deserialize a public key from a slice
-    pub fn from_slice(data: &[u8]) -> Result<PublicKey, Error> {
-        let compressed = match data.len() {
-            33 => true,
-            65 => false,
-            len =>  {
-                return Err(base58::Error::InvalidLength(len).into());
-            },
-        };
-
-        if !compressed && data[0] != 0x04 {
-            return Err(Error::InvalidKeyPrefix(data[0]))
-        }
-
-        Ok(PublicKey {
-            compressed,
-            inner: secp256k1::PublicKey::from_slice(data)?,
-        })
-    }
-
-    /// Computes the public key as supposed to be used with this secret
-    pub fn from_private_key<C: secp256k1::Signing>(secp: &Secp256k1<C>, sk: &PrivateKey) -> PublicKey {
-        sk.public_key(secp)
-    }
-}
-
-impl fmt::Display for PublicKey {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        if self.compressed {
-            for ch in &self.inner.serialize()[..] {
-                write!(f, "{:02x}", ch)?;
-            }
-        } else {
-            for ch in &self.inner.serialize_uncompressed()[..] {
-                write!(f, "{:02x}", ch)?;
-            }
-        }
-        Ok(())
-    }
-}
-
-impl FromStr for PublicKey {
-    type Err = Error;
-    fn from_str(s: &str) -> Result<PublicKey, Error> {
-        match s.len() {
-            66 => PublicKey::from_slice(&<[u8; 33]>::from_hex(s)?),
-            130 => PublicKey::from_slice(&<[u8; 65]>::from_hex(s)?),
-            len => return Err(Error::Hex(hex::Error::InvalidLength(66, len)))
-        }
-    }
-}
-
-/// A Bitcoin ECDSA private key
-#[derive(Copy, Clone, PartialEq, Eq)]
-#[cfg_attr(feature = "std", derive(Debug))]
-pub struct PrivateKey {
-    /// Whether this private key should be serialized as compressed
-    pub compressed: bool,
-    /// The network on which this key should be used
-    pub network: Network,
-    /// The actual ECDSA key
-    pub inner: secp256k1::SecretKey,
-}
-
-impl PrivateKey {
-    /// Constructs compressed ECDSA private key from the provided generic Secp256k1 private key
-    /// and the specified network
-    pub fn new(key: secp256k1::SecretKey, network: Network) -> PrivateKey {
-        PrivateKey {
-            compressed: true,
-            network,
-            inner: key,
-        }
-    }
-
-    /// Constructs uncompressed (legacy) ECDSA private key from the provided generic Secp256k1
-    /// private key and the specified network
-    pub fn new_uncompressed(key: secp256k1::SecretKey, network: Network) -> PrivateKey {
-        PrivateKey {
-            compressed: false,
-            network,
-            inner: key,
-        }
-    }
-
-    /// Creates a public key from this private key
-    pub fn public_key<C: secp256k1::Signing>(&self, secp: &Secp256k1<C>) -> PublicKey {
-        PublicKey {
-            compressed: self.compressed,
-            inner: secp256k1::PublicKey::from_secret_key(secp, &self.inner)
-        }
-    }
-
-    /// Serialize the private key to bytes
-    pub fn to_bytes(&self) -> Vec<u8> {
-        self.inner[..].to_vec()
-    }
-
-    /// Deserialize a private key from a slice
-    pub fn from_slice(data: &[u8], network: Network) -> Result<PrivateKey, Error> {
-        Ok(PrivateKey::new(secp256k1::SecretKey::from_slice(data)?, network))
-    }
-
-    /// Format the private key to WIF format.
-    pub fn fmt_wif(&self, fmt: &mut dyn fmt::Write) -> fmt::Result {
-        let mut ret = [0; 34];
-        ret[0] = match self.network {
-            Network::Dash => 128,
-            Network::Testnet | Network::Devnet | Network::Regtest => 239,
-        };
-        ret[1..33].copy_from_slice(&self.inner[..]);
-        let privkey = if self.compressed {
-            ret[33] = 1;
-            base58::check_encode_slice(&ret[..])
-        } else {
-            base58::check_encode_slice(&ret[..33])
-        };
-        fmt.write_str(&privkey)
-    }
-
-    /// Get WIF encoding of this private key.
-    pub fn to_wif(&self) -> String {
-        let mut buf = String::new();
-        buf.write_fmt(format_args!("{}", self)).unwrap();
-        buf.shrink_to_fit();
-        buf
-    }
-
-    /// Parse WIF encoded private key.
-    pub fn from_wif(wif: &str) -> Result<PrivateKey, Error> {
-        let data = base58::from_check(wif)?;
-
-        let compressed = match data.len() {
-            33 => false,
-            34 => true,
-            _ => {
-                return Err(Error::Base58(base58::Error::InvalidLength(data.len())));
-            }
-        };
-
-        let network = match data[0] {
-            128 => Network::Dash,
-            239 => Network::Testnet,
-            x   => {
-                return Err(Error::Base58(base58::Error::InvalidAddressVersion(x)));
-            }
-        };
-
-        Ok(PrivateKey {
-            compressed,
-            network,
-            inner: secp256k1::SecretKey::from_slice(&data[1..33])?,
-        })
-    }
-}
-
-impl fmt::Display for PrivateKey {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        self.fmt_wif(f)
-    }
-}
-
-#[cfg(not(feature = "std"))]
-impl fmt::Debug for PrivateKey {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "[private key data]")
-    }
-}
-
-impl FromStr for PrivateKey {
-    type Err = Error;
-    fn from_str(s: &str) -> Result<PrivateKey, Error> {
-        PrivateKey::from_wif(s)
-    }
-}
-
-impl ops::Index<ops::RangeFull> for PrivateKey {
-    type Output = [u8];
-    fn index(&self, _: ops::RangeFull) -> &[u8] {
-        &self.inner[..]
-    }
-}
-
-#[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-impl ::serde::Serialize for PrivateKey {
-    fn serialize<S: ::serde::Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
-        s.collect_str(self)
-    }
-}
-
-#[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-impl<'de> ::serde::Deserialize<'de> for PrivateKey {
-    fn deserialize<D: ::serde::Deserializer<'de>>(d: D) -> Result<PrivateKey, D::Error> {
-        struct WifVisitor;
-
-        impl<'de> ::serde::de::Visitor<'de> for WifVisitor {
-            type Value = PrivateKey;
-
-            fn expecting(&self, formatter: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                formatter.write_str("an ASCII WIF string")
-            }
-
-            fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
-            where
-                E: ::serde::de::Error,
-            {
-                if let Ok(s) = ::core::str::from_utf8(v) {
-                    PrivateKey::from_str(s).map_err(E::custom)
-                } else {
-                    Err(E::invalid_value(::serde::de::Unexpected::Bytes(v), &self))
-                }
-            }
-
-            fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
-            where
-                E: ::serde::de::Error,
-            {
-                PrivateKey::from_str(v).map_err(E::custom)
-            }
-        }
-
-        d.deserialize_str(WifVisitor)
-    }
-}
-
-#[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-impl ::serde::Serialize for PublicKey {
-    fn serialize<S: ::serde::Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
-        if s.is_human_readable() {
-            s.collect_str(self)
-        } else {
-            if self.compressed {
-                s.serialize_bytes(&self.inner.serialize()[..])
-            } else {
-                s.serialize_bytes(&self.inner.serialize_uncompressed()[..])
-            }
-        }
-    }
-}
-
-#[cfg(feature = "serde")]
-#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-impl<'de> ::serde::Deserialize<'de> for PublicKey {
-    fn deserialize<D: ::serde::Deserializer<'de>>(d: D) -> Result<PublicKey, D::Error> {
-        if d.is_human_readable() {
-            struct HexVisitor;
-
-            impl<'de> ::serde::de::Visitor<'de> for HexVisitor {
-                type Value = PublicKey;
-
-                fn expecting(&self, formatter: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                    formatter.write_str("an ASCII hex string")
-                }
-
-                fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
-                where
-                    E: ::serde::de::Error,
-                {
-                    if let Ok(hex) = ::core::str::from_utf8(v) {
-                        PublicKey::from_str(hex).map_err(E::custom)
-                    } else {
-                        Err(E::invalid_value(::serde::de::Unexpected::Bytes(v), &self))
-                    }
-                }
-
-                fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
-                where
-                    E: ::serde::de::Error,
-                {
-                    PublicKey::from_str(v).map_err(E::custom)
-                }
-            }
-            d.deserialize_str(HexVisitor)
-        } else {
-            struct BytesVisitor;
-
-            impl<'de> ::serde::de::Visitor<'de> for BytesVisitor {
-                type Value = PublicKey;
-
-                fn expecting(&self, formatter: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                    formatter.write_str("a bytestring")
-                }
-
-                fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
-                where
-                    E: ::serde::de::Error,
-                {
-                    PublicKey::from_slice(v).map_err(E::custom)
-                }
-            }
-
-            d.deserialize_bytes(BytesVisitor)
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use io;
-    use super::{PrivateKey, PublicKey};
-    use secp256k1::Secp256k1;
-    use std::str::FromStr;
-    use hashes::hex::ToHex;
-    use network::constants::Network::Testnet;
-    use network::constants::Network::Dash;
-    use util::address::Address;
-
-    #[test]
-    fn test_key_derivation() {
-        // testnet compressed
-        let sk = PrivateKey::from_wif("cVt4o7BGAig1UXywgGSmARhxMdzP5qvQsxKkSsc1XEkw3tDTQFpy").unwrap();
-        assert_eq!(sk.network, Testnet);
-        assert_eq!(sk.compressed, true);
-        assert_eq!(&sk.to_wif(), "cVt4o7BGAig1UXywgGSmARhxMdzP5qvQsxKkSsc1XEkw3tDTQFpy");
-
-        let secp = Secp256k1::new();
-        let pk = Address::p2pkh(&sk.public_key(&secp), sk.network);
-        assert_eq!(&pk.to_string(), "yWkKX7a2WGr14hRyr4rC6NUC8n5F4dX3zr");
-
-        // test string conversion
-        assert_eq!(&sk.to_string(), "cVt4o7BGAig1UXywgGSmARhxMdzP5qvQsxKkSsc1XEkw3tDTQFpy");
-        let sk_str =
-            PrivateKey::from_str("cVt4o7BGAig1UXywgGSmARhxMdzP5qvQsxKkSsc1XEkw3tDTQFpy").unwrap();
-        assert_eq!(&sk.to_wif(), &sk_str.to_wif());
-
-        // mainnet uncompressed
-        let sk = PrivateKey::from_wif("5JYkZjmN7PVMjJUfJWfRFwtuXTGB439XV6faajeHPAM9Z2PT2R3").unwrap();
-        assert_eq!(sk.network, Dash);
-        assert_eq!(sk.compressed, false);
-        assert_eq!(&sk.to_wif(), "5JYkZjmN7PVMjJUfJWfRFwtuXTGB439XV6faajeHPAM9Z2PT2R3");
-
-        let secp = Secp256k1::new();
-        let mut pk = sk.public_key(&secp);
-        assert_eq!(pk.compressed, false);
-        assert_eq!(&pk.to_string(), "042e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af191923a2964c177f5b5923ae500fca49e99492d534aa3759d6b25a8bc971b133");
-        assert_eq!(pk, PublicKey::from_str("042e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af191923a2964c177f5b5923ae500fca49e99492d534aa3759d6b25a8bc971b133").unwrap());
-        let addr = Address::p2pkh(&pk, sk.network);
-        assert_eq!(&addr.to_string(), "XrPFkVkXHrBAFsnYCfpz996fkCXqZAzuEm");
-        pk.compressed = true;
-        assert_eq!(&pk.to_string(), "032e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af");
-        assert_eq!(pk, PublicKey::from_str("032e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af").unwrap());
-    }
-
-    #[test]
-    fn test_pubkey_hash() {
-        let pk = PublicKey::from_str("032e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af").unwrap();
-        let upk = PublicKey::from_str("042e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af191923a2964c177f5b5923ae500fca49e99492d534aa3759d6b25a8bc971b133").unwrap();
-        assert_eq!(pk.pubkey_hash().to_hex(), "9511aa27ef39bbfa4e4f3dd15f4d66ea57f475b4");
-        assert_eq!(upk.pubkey_hash().to_hex(), "ac2e7daf42d2c97418fd9f78af2de552bb9c6a7a");
-    }
-
-    #[test]
-    fn test_wpubkey_hash() {
-        let pk = PublicKey::from_str("032e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af").unwrap();
-        let upk = PublicKey::from_str("042e58afe51f9ed8ad3cc7897f634d881fdbe49a81564629ded8156bebd2ffd1af191923a2964c177f5b5923ae500fca49e99492d534aa3759d6b25a8bc971b133").unwrap();
-        assert_eq!(pk.wpubkey_hash().unwrap().to_hex(), "9511aa27ef39bbfa4e4f3dd15f4d66ea57f475b4");
-        assert_eq!(upk.wpubkey_hash(), None);
-    }
-
-    #[cfg(feature = "serde")]
-    #[test]
-    fn test_key_serde() {
-        use serde_test::{Configure, Token, assert_tokens};
-
-        static KEY_WIF: &'static str = "cVt4o7BGAig1UXywgGSmARhxMdzP5qvQsxKkSsc1XEkw3tDTQFpy";
-        static PK_STR: &'static str = "039b6347398505f5ec93826dc61c19f47c66c0283ee9be980e29ce325a0f4679ef";
-        static PK_STR_U: &'static str = "\
-            04\
-            9b6347398505f5ec93826dc61c19f47c66c0283ee9be980e29ce325a0f4679ef\
-            87288ed73ce47fc4f5c79d19ebfa57da7cff3aff6e819e4ee971d86b5e61875d\
-        ";
-        static PK_BYTES: [u8; 33] = [
-            0x03,
-            0x9b, 0x63, 0x47, 0x39, 0x85, 0x05, 0xf5, 0xec,
-            0x93, 0x82, 0x6d, 0xc6, 0x1c, 0x19, 0xf4, 0x7c,
-            0x66, 0xc0, 0x28, 0x3e, 0xe9, 0xbe, 0x98, 0x0e,
-            0x29, 0xce, 0x32, 0x5a, 0x0f, 0x46, 0x79, 0xef,
-        ];
-        static PK_BYTES_U: [u8; 65] = [
-            0x04,
-            0x9b, 0x63, 0x47, 0x39, 0x85, 0x05, 0xf5, 0xec,
-            0x93, 0x82, 0x6d, 0xc6, 0x1c, 0x19, 0xf4, 0x7c,
-            0x66, 0xc0, 0x28, 0x3e, 0xe9, 0xbe, 0x98, 0x0e,
-            0x29, 0xce, 0x32, 0x5a, 0x0f, 0x46, 0x79, 0xef,
-            0x87, 0x28, 0x8e, 0xd7, 0x3c, 0xe4, 0x7f, 0xc4,
-            0xf5, 0xc7, 0x9d, 0x19, 0xeb, 0xfa, 0x57, 0xda,
-            0x7c, 0xff, 0x3a, 0xff, 0x6e, 0x81, 0x9e, 0x4e,
-            0xe9, 0x71, 0xd8, 0x6b, 0x5e, 0x61, 0x87, 0x5d,
-        ];
-
-        let s = Secp256k1::new();
-        let sk = PrivateKey::from_str(&KEY_WIF).unwrap();
-        let pk = PublicKey::from_private_key(&s, &sk);
-        let pk_u = PublicKey {
-            inner: pk.inner,
-            compressed: false,
-        };
-
-        assert_tokens(&sk, &[Token::BorrowedStr(KEY_WIF)]);
-        assert_tokens(&pk.compact(), &[Token::BorrowedBytes(&PK_BYTES[..])]);
-        assert_tokens(&pk.readable(), &[Token::BorrowedStr(PK_STR)]);
-        assert_tokens(&pk_u.compact(), &[Token::BorrowedBytes(&PK_BYTES_U[..])]);
-        assert_tokens(&pk_u.readable(), &[Token::BorrowedStr(PK_STR_U)]);
-    }
-
-    fn random_key(mut seed: u8) -> PublicKey {
-        loop {
-            let mut data = [0; 65];
-            for byte in &mut data[..] {
-                *byte = seed;
-                // totally a rng
-                seed = seed.wrapping_mul(41).wrapping_add(43);
-            }
-            if data[0] % 2 == 0 {
-                data[0] = 4;
-                if let Ok(key) = PublicKey::from_slice(&data[..]) {
-                    return key;
-                }
-            } else {
-                data[0] = 2 + (data[0] >> 7);
-                if let Ok(key) = PublicKey::from_slice(&data[..33]) {
-                    return key;
-                }
-            }
-        }
-    }
-
-    #[test]
-    fn pubkey_read_write() {
-        const N_KEYS: usize = 20;
-        let keys: Vec<_> = (0..N_KEYS).map(|i| random_key(i as u8)).collect();
-
-        let mut v = vec![];
-        for k in &keys {
-            k.write_into(&mut v).expect("writing into vec");
-        }
-
-        let mut dec_keys = vec![];
-        let mut cursor = io::Cursor::new(&v);
-        for _ in 0..N_KEYS {
-            dec_keys.push(PublicKey::read_from(&mut cursor).expect("reading from vec"));
-        }
-
-        assert_eq!(keys, dec_keys);
-
-        // sanity checks
-        assert!(PublicKey::read_from(&mut cursor).is_err());
-        assert!(PublicKey::read_from(io::Cursor::new(&[])).is_err());
-        assert!(PublicKey::read_from(io::Cursor::new(&[0; 33][..])).is_err());
-        assert!(PublicKey::read_from(io::Cursor::new(&[2; 32][..])).is_err());
-        assert!(PublicKey::read_from(io::Cursor::new(&[0; 65][..])).is_err());
-        assert!(PublicKey::read_from(io::Cursor::new(&[4; 64][..])).is_err());
-    }
-}
diff --git a/src/util/mod.rs b/src/util/mod.rs
deleted file mode 100644
index 88f0d1303..000000000
--- a/src/util/mod.rs
+++ /dev/null
@@ -1,137 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Utility functions.
-//!
-//! Functions needed by all parts of the Bitcoin library.
-//!
-
-pub mod key;
-pub mod ecdsa;
-pub mod schnorr;
-pub mod address;
-pub mod amount;
-pub mod base58;
-pub mod bip32;
-pub mod bip143;
-pub mod hash;
-pub mod merkleblock;
-pub mod misc;
-pub mod psbt;
-pub mod taproot;
-pub mod uint;
-pub mod bip158;
-pub mod sighash;
-
-
-pub(crate) mod endian;
-
-use prelude::*;
-use io;
-use core::fmt;
-#[cfg(feature = "std")] use std::error;
-
-use network;
-use consensus::encode;
-
-#[cfg(feature="signer")] pub mod signer;
-
-/// A trait which allows numbers to act as fixed-size bit arrays
-pub trait BitArray {
-    /// Is bit set?
-    fn bit(&self, idx: usize) -> bool;
-
-    /// Returns an array which is just the bits from start to end
-    fn bit_slice(&self, start: usize, end: usize) -> Self;
-
-    /// Bitwise and with `n` ones
-    fn mask(&self, n: usize) -> Self;
-
-    /// Trailing zeros
-    fn trailing_zeros(&self) -> usize;
-
-    /// Create all-zeros value
-    fn zero() -> Self;
-
-    /// Create value representing one
-    fn one() -> Self;
-}
-
-/// A general error code, other errors should implement conversions to/from this
-/// if appropriate.
-#[derive(Debug)]
-pub enum Error {
-    /// Encoding error
-    Encode(encode::Error),
-    /// Network error
-    Network(network::Error),
-    /// The header hash is not below the target
-    BlockBadProofOfWork,
-    /// The `target` field of a block header did not match the expected difficulty
-    BlockBadTarget,
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            Error::Encode(ref e) => fmt::Display::fmt(e, f),
-            Error::Network(ref e) => fmt::Display::fmt(e, f),
-            Error::BlockBadProofOfWork => f.write_str("block target correct but not attained"),
-            Error::BlockBadTarget => f.write_str("block target incorrect"),
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-impl ::std::error::Error for Error {
-    fn cause(&self) -> Option<&dyn  error::Error> {
-        match *self {
-            Error::Encode(ref e) => Some(e),
-            Error::Network(ref e) => Some(e),
-            Error::BlockBadProofOfWork | Error::BlockBadTarget => None
-        }
-    }
-}
-
-#[doc(hidden)]
-impl From<encode::Error> for Error {
-    fn from(e: encode::Error) -> Error {
-        Error::Encode(e)
-    }
-}
-
-#[doc(hidden)]
-impl From<network::Error> for Error {
-    fn from(e: network::Error) -> Error {
-        Error::Network(e)
-    }
-}
-
-// core2 doesn't have read_to_end
-pub(crate) fn read_to_end<D: io::Read>(mut d: D) -> Result<Vec<u8>, io::Error> {
-    let mut result = vec![];
-    let mut buf = [0u8; 64];
-    loop {
-        match d.read(&mut buf) {
-            Ok(0) => break,
-            Ok(n) => result.extend_from_slice(&buf[0..n]),
-            Err(ref e) if e.kind() == io::ErrorKind::Interrupted => {},
-            Err(e) => return Err(e),
-        };
-    }
-    Ok(result)
-}
diff --git a/src/util/psbt/error.rs b/src/util/psbt/error.rs
deleted file mode 100644
index c281106de..000000000
--- a/src/util/psbt/error.rs
+++ /dev/null
@@ -1,128 +0,0 @@
-// Rust Bitcoin Library
-// Written by
-//   The Rust Bitcoin developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-use prelude::*;
-
-use core::fmt;
-
-use blockdata::transaction::Transaction;
-use consensus::encode;
-use util::psbt::raw;
-
-use hashes;
-use util::bip32::ExtendedPubKey;
-
-/// Enum for marking psbt hash error.
-#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-pub enum PsbtHash {
-    Ripemd,
-    Sha256,
-    Hash160,
-    Hash256,
-}
-/// Ways that a Partially Signed Transaction might fail.
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-pub enum Error {
-    /// Magic bytes for a PSBT must be the ASCII for "psbt" serialized in most
-    /// significant byte order.
-    InvalidMagic,
-    /// The separator for a PSBT must be `0xff`.
-    InvalidSeparator,
-    /// Known keys must be according to spec.
-    InvalidKey(raw::Key),
-    /// Non-proprietary key type found when proprietary key was expected
-    InvalidProprietaryKey,
-    /// Keys within key-value map should never be duplicated.
-    DuplicateKey(raw::Key),
-    /// The scriptSigs for the unsigned transaction must be empty.
-    UnsignedTxHasScriptSigs,
-    /// The scriptWitnesses for the unsigned transaction must be empty.
-    UnsignedTxHasScriptWitnesses,
-    /// A PSBT must have an unsigned transaction.
-    MustHaveUnsignedTx,
-    /// Signals that there are no more key-value pairs in a key-value map.
-    NoMorePairs,
-    /// Attempting to combine with a PSBT describing a different unsigned
-    /// transaction.
-    UnexpectedUnsignedTx {
-        /// Expected
-        expected: Box<Transaction>,
-        /// Actual
-        actual: Box<Transaction>,
-    },
-    /// Unable to parse as a standard sighash type.
-    NonStandardSighashType(u32),
-    /// Parsing errors from bitcoin_hashes
-    HashParseError(hashes::Error),
-    /// The pre-image must hash to the correponding psbt hash
-    InvalidPreimageHashPair {
-        /// Hash-type
-        hash_type: PsbtHash,
-        /// Pre-image
-        preimage: Box<[u8]>,
-        /// Hash value
-        hash: Box<[u8]>,
-    },
-    /// Conflicting data during combine procedure:
-    /// global extended public key has inconsistent key sources
-    CombineInconsistentKeySources(ExtendedPubKey),
-    /// Serialization error in bitcoin consensus-encoded structures
-    ConsensusEncoding,
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            Error::InvalidKey(ref rkey) => write!(f, "invalid key: {}", rkey),
-            Error::InvalidProprietaryKey => write!(f, "non-proprietary key type found when proprietary key was expected"),
-            Error::DuplicateKey(ref rkey) => write!(f, "duplicate key: {}", rkey),
-            Error::UnexpectedUnsignedTx { expected: ref e, actual: ref a } => write!(f, "different unsigned transaction: expected {}, actual {}", e.txid(), a.txid()),
-            Error::NonStandardSighashType(ref sht) => write!(f, "non-standard sighash type: {}", sht),
-            Error::InvalidMagic => f.write_str("invalid magic"),
-            Error::InvalidSeparator => f.write_str("invalid separator"),
-            Error::UnsignedTxHasScriptSigs => f.write_str("the unsigned transaction has script sigs"),
-            Error::UnsignedTxHasScriptWitnesses => f.write_str("the unsigned transaction has script witnesses"),
-            Error::MustHaveUnsignedTx => {
-                f.write_str("partially signed transactions must have an unsigned transaction")
-            }
-            Error::NoMorePairs => f.write_str("no more key-value pairs for this psbt map"),
-            Error::HashParseError(e) => write!(f, "Hash Parse Error: {}", e),
-            Error::InvalidPreimageHashPair{ref preimage, ref hash, ref hash_type} => {
-                // directly using debug forms of psbthash enums
-                write!(f, "Preimage {:?} does not match {:?} hash {:?}", preimage, hash_type, hash )
-            }
-            Error::CombineInconsistentKeySources(ref s) => { write!(f, "combine conflict: {}", s) }
-            Error::ConsensusEncoding => f.write_str("bitcoin consensus or BIP-174 encoding error"),
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-impl ::std::error::Error for Error {}
-
-#[doc(hidden)]
-impl From<hashes::Error> for Error {
-    fn from(e: hashes::Error) -> Error {
-        Error::HashParseError(e)
-    }
-}
-
-impl From<encode::Error> for Error {
-    fn from(err: encode::Error) -> Self {
-        match err {
-            encode::Error::Psbt(err) => err,
-            _ => Error::ConsensusEncoding,
-        }
-    }
-}
diff --git a/src/util/psbt/macros.rs b/src/util/psbt/macros.rs
deleted file mode 100644
index 78c7f3597..000000000
--- a/src/util/psbt/macros.rs
+++ /dev/null
@@ -1,180 +0,0 @@
-// Rust Bitcoin Library
-// Written by
-//   The Rust Bitcoin developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-#[allow(unused_macros)]
-macro_rules! hex_psbt {
-    ($s:expr) => { $crate::consensus::deserialize::<$crate::util::psbt::PartiallySignedTransaction>(&<$crate::prelude::Vec<u8> as $crate::hashes::hex::FromHex>::from_hex($s).unwrap()) };
-}
-
-macro_rules! combine {
-    ($thing:ident, $slf:ident, $other:ident) => {
-        if let (&None, Some($thing)) = (&$slf.$thing, $other.$thing) {
-            $slf.$thing = Some($thing);
-        }
-    };
-}
-
-macro_rules! impl_psbt_de_serialize {
-    ($thing:ty) => {
-        impl_psbt_serialize!($thing);
-        impl_psbt_deserialize!($thing);
-    };
-}
-
-macro_rules! impl_psbt_deserialize {
-    ($thing:ty) => {
-        impl $crate::util::psbt::serialize::Deserialize for $thing {
-            fn deserialize(bytes: &[u8]) -> Result<Self, $crate::consensus::encode::Error> {
-                $crate::consensus::deserialize(&bytes[..])
-            }
-        }
-    };
-}
-
-macro_rules! impl_psbt_serialize {
-    ($thing:ty) => {
-        impl $crate::util::psbt::serialize::Serialize for $thing {
-            fn serialize(&self) -> $crate::prelude::Vec<u8> {
-                $crate::consensus::serialize(self)
-            }
-        }
-    };
-}
-
-macro_rules! impl_psbtmap_consensus_encoding {
-    ($thing:ty) => {
-        impl $crate::consensus::Encodable for $thing {
-            fn consensus_encode<S: $crate::io::Write>(
-                &self,
-                s: S,
-            ) -> Result<usize, $crate::io::Error> {
-                self.consensus_encode_map(s)
-            }
-        }
-    };
-}
-
-macro_rules! impl_psbtmap_consensus_decoding {
-    ($thing:ty) => {
-        impl $crate::consensus::Decodable for $thing {
-            fn consensus_decode<D: $crate::io::Read>(
-                mut d: D,
-            ) -> Result<Self, $crate::consensus::encode::Error> {
-                let mut rv: Self = ::core::default::Default::default();
-
-                loop {
-                    match $crate::consensus::Decodable::consensus_decode(&mut d) {
-                        Ok(pair) => rv.insert_pair(pair)?,
-                        Err($crate::consensus::encode::Error::Psbt($crate::util::psbt::Error::NoMorePairs)) => return Ok(rv),
-                        Err(e) => return Err(e),
-                    }
-                }
-            }
-        }
-    };
-}
-
-macro_rules! impl_psbtmap_consensus_enc_dec_oding {
-    ($thing:ty) => {
-        impl_psbtmap_consensus_decoding!($thing);
-        impl_psbtmap_consensus_encoding!($thing);
-    };
-}
-
-#[cfg_attr(rustfmt, rustfmt_skip)]
-macro_rules! impl_psbt_insert_pair {
-    ($slf:ident.$unkeyed_name:ident <= <$raw_key:ident: _>|<$raw_value:ident: $unkeyed_value_type:ty>) => {
-        if $raw_key.key.is_empty() {
-            if $slf.$unkeyed_name.is_none() {
-                let val: $unkeyed_value_type = $crate::util::psbt::serialize::Deserialize::deserialize(&$raw_value)?;
-                $slf.$unkeyed_name = Some(val)
-            } else {
-                return Err($crate::util::psbt::Error::DuplicateKey($raw_key).into());
-            }
-        } else {
-            return Err($crate::util::psbt::Error::InvalidKey($raw_key).into());
-        }
-    };
-    ($slf:ident.$keyed_name:ident <= <$raw_key:ident: $keyed_key_type:ty>|<$raw_value:ident: $keyed_value_type:ty>) => {
-        if !$raw_key.key.is_empty() {
-            let key_val: $keyed_key_type = $crate::util::psbt::serialize::Deserialize::deserialize(&$raw_key.key)?;
-            match $slf.$keyed_name.entry(key_val) {
-                $crate::prelude::btree_map::Entry::Vacant(empty_key) => {
-                    let val: $keyed_value_type = $crate::util::psbt::serialize::Deserialize::deserialize(&$raw_value)?;
-                    empty_key.insert(val);
-                }
-                $crate::prelude::btree_map::Entry::Occupied(_) => return Err($crate::util::psbt::Error::DuplicateKey($raw_key).into()),
-            }
-        } else {
-            return Err($crate::util::psbt::Error::InvalidKey($raw_key).into());
-        }
-    };
-}
-
-
-#[cfg_attr(rustfmt, rustfmt_skip)]
-macro_rules! impl_psbt_get_pair {
-    ($rv:ident.push($slf:ident.$unkeyed_name:ident, $unkeyed_typeval:ident)) => {
-        if let Some(ref $unkeyed_name) = $slf.$unkeyed_name {
-            $rv.push($crate::util::psbt::raw::Pair {
-                key: $crate::util::psbt::raw::Key {
-                    type_value: $unkeyed_typeval,
-                    key: vec![],
-                },
-                value: $crate::util::psbt::serialize::Serialize::serialize($unkeyed_name),
-            });
-        }
-    };
-    ($rv:ident.push_map($slf:ident.$keyed_name:ident, $keyed_typeval:ident)) => {
-        for (key, val) in &$slf.$keyed_name {
-            $rv.push($crate::util::psbt::raw::Pair {
-                key: $crate::util::psbt::raw::Key {
-                    type_value: $keyed_typeval,
-                    key: $crate::util::psbt::serialize::Serialize::serialize(key),
-                },
-                value: $crate::util::psbt::serialize::Serialize::serialize(val),
-            });
-        }
-    };
-}
-
-// macros for serde of hashes
-macro_rules! impl_psbt_hash_de_serialize {
-    ($hash_type:ty) => {
-        impl_psbt_hash_serialize!($hash_type);
-        impl_psbt_hash_deserialize!($hash_type);
-    };
-}
-
-macro_rules! impl_psbt_hash_deserialize {
-    ($hash_type:ty) => {
-        impl $crate::util::psbt::serialize::Deserialize for $hash_type {
-            fn deserialize(bytes: &[u8]) -> Result<Self, $crate::consensus::encode::Error> {
-                <$hash_type>::from_slice(&bytes[..]).map_err(|e| {
-                    $crate::util::psbt::Error::from(e).into()
-                })
-            }
-        }
-    };
-}
-
-macro_rules! impl_psbt_hash_serialize {
-    ($hash_type:ty) => {
-        impl $crate::util::psbt::serialize::Serialize for $hash_type {
-            fn serialize(&self) -> $crate::prelude::Vec<u8> {
-                self.into_inner().to_vec()
-            }
-        }
-    };
-}
diff --git a/src/util/psbt/map/mod.rs b/src/util/psbt/map/mod.rs
deleted file mode 100644
index 3b25bd21f..000000000
--- a/src/util/psbt/map/mod.rs
+++ /dev/null
@@ -1,43 +0,0 @@
-// Rust Bitcoin Library
-// Written by
-//   The Rust Bitcoin developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-use prelude::*;
-
-use io;
-
-use consensus::encode;
-use util::psbt::raw;
-
-mod global;
-mod input;
-mod output;
-
-pub use self::input::{Input, PsbtSighashType};
-pub use self::output::{Output, TapTree, IncompleteTapTree};
-
-/// A trait that describes a PSBT key-value map.
-pub(super) trait Map {
-    /// Attempt to get all key-value pairs.
-    fn get_pairs(&self) -> Result<Vec<raw::Pair>, io::Error>;
-
-    /// Encodes map data with bitcoin consensus encoding.
-    fn consensus_encode_map<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let mut len = 0;
-        for pair in Map::get_pairs(self)? {
-            len += encode::Encodable::consensus_encode(&pair, &mut s)?;
-        }
-
-        Ok(len + encode::Encodable::consensus_encode(&0x00_u8, s)?)
-    }
-}
diff --git a/src/util/psbt/map/output.rs b/src/util/psbt/map/output.rs
deleted file mode 100644
index 2545497df..000000000
--- a/src/util/psbt/map/output.rs
+++ /dev/null
@@ -1,319 +0,0 @@
-// Rust Bitcoin Library
-// Written by
-//   The Rust Bitcoin developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-use prelude::*;
-use core;
-
-use io;
-
-use blockdata::script::Script;
-use consensus::encode;
-use secp256k1::XOnlyPublicKey;
-use util::bip32::KeySource;
-use secp256k1;
-use util::psbt::map::Map;
-use util::psbt::raw;
-use util::psbt::Error;
-
-use util::taproot::{ScriptLeaf, TapLeafHash};
-
-use util::taproot::{NodeInfo, TaprootBuilder};
-
-/// Type: Redeem Script PSBT_OUT_REDEEM_SCRIPT = 0x00
-const PSBT_OUT_REDEEM_SCRIPT: u8 = 0x00;
-/// Type: Witness Script PSBT_OUT_WITNESS_SCRIPT = 0x01
-const PSBT_OUT_WITNESS_SCRIPT: u8 = 0x01;
-/// Type: BIP 32 Derivation Path PSBT_OUT_BIP32_DERIVATION = 0x02
-const PSBT_OUT_BIP32_DERIVATION: u8 = 0x02;
-/// Type: Taproot Internal Key PSBT_OUT_TAP_INTERNAL_KEY = 0x05
-const PSBT_OUT_TAP_INTERNAL_KEY: u8 = 0x05;
-/// Type: Taproot Tree PSBT_OUT_TAP_TREE = 0x06
-const PSBT_OUT_TAP_TREE: u8 = 0x06;
-/// Type: Taproot Key BIP 32 Derivation Path PSBT_OUT_TAP_BIP32_DERIVATION = 0x07
-const PSBT_OUT_TAP_BIP32_DERIVATION: u8 = 0x07;
-/// Type: Proprietary Use Type PSBT_IN_PROPRIETARY = 0xFC
-const PSBT_OUT_PROPRIETARY: u8 = 0xFC;
-
-/// A key-value map for an output of the corresponding index in the unsigned
-/// transaction.
-#[derive(Clone, Default, Debug, PartialEq, Eq)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct Output {
-    /// The redeem script for this output.
-    pub redeem_script: Option<Script>,
-    /// The witness script for this output.
-    pub witness_script: Option<Script>,
-    /// A map from public keys needed to spend this output to their
-    /// corresponding master key fingerprints and derivation paths.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
-    pub bip32_derivation: BTreeMap<secp256k1::PublicKey, KeySource>,
-    /// The internal pubkey.
-    pub tap_internal_key: Option<XOnlyPublicKey>,
-    /// Taproot Output tree.
-    pub tap_tree: Option<TapTree>,
-    /// Map of tap root x only keys to origin info and leaf hashes contained in it.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
-    pub tap_key_origins: BTreeMap<XOnlyPublicKey, (Vec<TapLeafHash>, KeySource)>,
-    /// Proprietary key-value pairs for this output.
-    #[cfg_attr(
-        feature = "serde",
-        serde(with = "::serde_utils::btreemap_as_seq_byte_values")
-    )]
-    pub proprietary: BTreeMap<raw::ProprietaryKey, Vec<u8>>,
-    /// Unknown key-value pairs for this output.
-    #[cfg_attr(
-        feature = "serde",
-        serde(with = "::serde_utils::btreemap_as_seq_byte_values")
-    )]
-    pub unknown: BTreeMap<raw::Key, Vec<u8>>,
-}
-
-/// Error happening when [`TapTree`] is constructed from a [`TaprootBuilder`]
-/// having hidden branches or not being finalized.
-#[derive(Clone, Ord, PartialOrd, Eq, PartialEq, Hash, Debug)]
-pub enum IncompleteTapTree {
-    /// Indicates an attempt to construct a tap tree from a builder containing incomplete branches.
-    NotFinalized(TaprootBuilder),
-    /// Indicates an attempt to construct a tap tree from a builder containing hidden parts.
-    HiddenParts(TaprootBuilder),
-}
-
-impl IncompleteTapTree {
-    /// Converts error into the original incomplete [`TaprootBuilder`] instance.
-    pub fn into_builder(self) -> TaprootBuilder {
-        match self {
-            IncompleteTapTree::NotFinalized(builder) |
-            IncompleteTapTree::HiddenParts(builder) => builder
-        }
-    }
-}
-
-impl core::fmt::Display for IncompleteTapTree {
-    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-        f.write_str(match self {
-            IncompleteTapTree::NotFinalized(_) => "an attempt to construct a tap tree from a builder containing incomplete branches.",
-            IncompleteTapTree::HiddenParts(_) => "an attempt to construct a tap tree from a builder containing hidden parts.",
-        })
-    }
-}
-
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl ::std::error::Error for IncompleteTapTree {}
-
-/// Taproot Tree representing a finalized [`TaprootBuilder`] (a complete binary tree).
-#[derive(Clone, Debug)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct TapTree(pub(crate) TaprootBuilder);
-
-impl PartialEq for TapTree {
-    fn eq(&self, other: &Self) -> bool {
-        self.node_info().hash.eq(&other.node_info().hash)
-    }
-}
-
-impl Eq for TapTree {}
-
-impl From<TapTree> for TaprootBuilder {
-    #[inline]
-    fn from(tree: TapTree) -> Self {
-        tree.into_builder()
-    }
-}
-
-impl TapTree {
-    /// Gets the inner node info as the builder is finalized.
-    pub fn node_info(&self) -> &NodeInfo {
-        // The builder algorithm invariant guarantees that is_complete builder
-        // have only 1 element in branch and that is not None.
-        // We make sure that we only allow is_complete builders via the from_inner
-        // constructor
-        self.0.branch()[0].as_ref().expect("from_inner only parses is_complete builders")
-    }
-
-    /// Constructs [`TapTree`] from a [`TaprootBuilder`] if it is complete binary tree.
-    ///
-    /// # Returns
-    /// A [`TapTree`] iff the `builder` is complete, otherwise return [`IncompleteTapTree`]
-    /// error with the content of incomplete `builder` instance.
-    pub fn from_builder(builder: TaprootBuilder) -> Result<Self, IncompleteTapTree> {
-        if !builder.is_finalized() {
-            Err(IncompleteTapTree::NotFinalized(builder))
-        } else if builder.has_hidden_nodes() {
-            Err(IncompleteTapTree::HiddenParts(builder))
-        } else {
-            Ok(TapTree(builder))
-        }
-    }
-
-    /// Converts self into builder [`TaprootBuilder`]. The builder is guaranteed to be finalized.
-    pub fn into_builder(self) -> TaprootBuilder {
-        self.0
-    }
-
-    /// Constructs [`TaprootBuilder`] by internally cloning the `self`. The builder is guaranteed
-    /// to be finalized.
-    pub fn to_builder(&self) -> TaprootBuilder {
-        self.0.clone()
-    }
-
-    /// Returns [`TapTreeIter`] iterator for a taproot script tree, operating in DFS order over
-    /// tree [`ScriptLeaf`]s.
-    pub fn script_leaves(&self) -> TapTreeIter {
-        match (self.0.branch().len(), self.0.branch().last()) {
-            (1, Some(Some(root))) => {
-                TapTreeIter {
-                    leaf_iter: root.leaves.iter()
-                }
-            }
-            // This should be unreachable as we Taptree is already finalized
-            _ => unreachable!("non-finalized tree builder inside TapTree"),
-        }
-    }
-}
-
-/// Iterator for a taproot script tree, operating in DFS order over leaf depth and
-/// leaf script pairs.
-pub struct TapTreeIter<'tree> {
-    leaf_iter: core::slice::Iter<'tree, ScriptLeaf>,
-}
-
-impl<'tree> Iterator for TapTreeIter<'tree> {
-    type Item = &'tree ScriptLeaf;
-
-    #[inline]
-    fn next(&mut self) -> Option<Self::Item> {
-        self.leaf_iter.next()
-    }
-}
-
-impl Output {
-    pub(super) fn insert_pair(&mut self, pair: raw::Pair) -> Result<(), encode::Error> {
-        let raw::Pair {
-            key: raw_key,
-            value: raw_value,
-        } = pair;
-
-        match raw_key.type_value {
-            PSBT_OUT_REDEEM_SCRIPT => {
-                impl_psbt_insert_pair! {
-                    self.redeem_script <= <raw_key: _>|<raw_value: Script>
-                }
-            }
-            PSBT_OUT_WITNESS_SCRIPT => {
-                impl_psbt_insert_pair! {
-                    self.witness_script <= <raw_key: _>|<raw_value: Script>
-                }
-            }
-            PSBT_OUT_BIP32_DERIVATION => {
-                impl_psbt_insert_pair! {
-                    self.bip32_derivation <= <raw_key: secp256k1::PublicKey>|<raw_value: KeySource>
-                }
-            }
-            PSBT_OUT_PROPRIETARY => {
-                let key = raw::ProprietaryKey::from_key(raw_key.clone())?;
-                match self.proprietary.entry(key) {
-                    btree_map::Entry::Vacant(empty_key) => {
-                        empty_key.insert(raw_value);
-                    },
-                    btree_map::Entry::Occupied(_) => return Err(Error::DuplicateKey(raw_key).into()),
-                }
-            }
-            PSBT_OUT_TAP_INTERNAL_KEY => {
-                impl_psbt_insert_pair! {
-                    self.tap_internal_key <= <raw_key: _>|<raw_value: XOnlyPublicKey>
-                }
-            }
-            PSBT_OUT_TAP_TREE => {
-                impl_psbt_insert_pair! {
-                    self.tap_tree <= <raw_key: _>|<raw_value: TapTree>
-                }
-            }
-            PSBT_OUT_TAP_BIP32_DERIVATION => {
-                impl_psbt_insert_pair! {
-                    self.tap_key_origins <= <raw_key: XOnlyPublicKey>|< raw_value: (Vec<TapLeafHash>, KeySource)>
-                }
-            }
-            _ => match self.unknown.entry(raw_key) {
-                btree_map::Entry::Vacant(empty_key) => {
-                    empty_key.insert(raw_value);
-                }
-                btree_map::Entry::Occupied(k) => return Err(Error::DuplicateKey(k.key().clone()).into()),
-            }
-        }
-
-        Ok(())
-    }
-
-    /// Combines this [`Output`] with `other` `Output` (as described by BIP 174).
-    pub fn combine(&mut self, other: Self) {
-        self.bip32_derivation.extend(other.bip32_derivation);
-        self.proprietary.extend(other.proprietary);
-        self.unknown.extend(other.unknown);
-        self.tap_key_origins.extend(other.tap_key_origins);
-
-        combine!(redeem_script, self, other);
-        combine!(witness_script, self, other);
-        combine!(tap_internal_key, self, other);
-        combine!(tap_tree, self, other);
-    }
-}
-
-impl Map for Output {
-    fn get_pairs(&self) -> Result<Vec<raw::Pair>, io::Error> {
-        let mut rv: Vec<raw::Pair> = Default::default();
-
-        impl_psbt_get_pair! {
-            rv.push(self.redeem_script, PSBT_OUT_REDEEM_SCRIPT)
-        }
-
-        impl_psbt_get_pair! {
-            rv.push(self.witness_script, PSBT_OUT_WITNESS_SCRIPT)
-        }
-
-        impl_psbt_get_pair! {
-            rv.push_map(self.bip32_derivation, PSBT_OUT_BIP32_DERIVATION)
-        }
-
-        impl_psbt_get_pair! {
-            rv.push(self.tap_internal_key, PSBT_OUT_TAP_INTERNAL_KEY)
-        }
-
-        impl_psbt_get_pair! {
-            rv.push(self.tap_tree, PSBT_OUT_TAP_TREE)
-        }
-
-        impl_psbt_get_pair! {
-            rv.push_map(self.tap_key_origins, PSBT_OUT_TAP_BIP32_DERIVATION)
-        }
-
-        for (key, value) in self.proprietary.iter() {
-            rv.push(raw::Pair {
-                key: key.to_key(),
-                value: value.clone(),
-            });
-        }
-
-        for (key, value) in self.unknown.iter() {
-            rv.push(raw::Pair {
-                key: key.clone(),
-                value: value.clone(),
-            });
-        }
-
-        Ok(rv)
-    }
-}
-
-impl_psbtmap_consensus_enc_dec_oding!(Output);
diff --git a/src/util/psbt/raw.rs b/src/util/psbt/raw.rs
deleted file mode 100644
index 7e028570a..000000000
--- a/src/util/psbt/raw.rs
+++ /dev/null
@@ -1,175 +0,0 @@
-// Rust Bitcoin Library
-// Written by
-//   The Rust Bitcoin developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Raw PSBT key-value pairs.
-//!
-//! Raw PSBT key-value pairs as defined at
-//! <https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki>.
-//!
-
-use prelude::*;
-use core::fmt;
-
-use io;
-use consensus::encode::{self, ReadExt, WriteExt, Decodable, Encodable, VarInt, serialize, deserialize, MAX_VEC_SIZE};
-use hashes::hex;
-use util::psbt::Error;
-use util::read_to_end;
-
-/// A PSBT key in its raw byte form.
-#[derive(Debug, PartialEq, Hash, Eq, Clone, Ord, PartialOrd)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct Key {
-    /// The type of this PSBT key.
-    pub type_value: u8,
-    /// The key itself in raw byte form.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::hex_bytes"))]
-    pub key: Vec<u8>,
-}
-
-/// A PSBT key-value pair in its raw byte form.
-#[derive(Debug, PartialEq)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct Pair {
-    /// The key of this key-value pair.
-    pub key: Key,
-    /// The value of this key-value pair in raw byte form.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::hex_bytes"))]
-    pub value: Vec<u8>,
-}
-
-/// Default implementation for proprietary key subtyping
-pub type ProprietaryType = u8;
-
-/// Proprietary keys (i.e. keys starting with 0xFC byte) with their internal
-/// structure according to BIP 174.
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct ProprietaryKey<Subtype=ProprietaryType> where Subtype: Copy + From<u8> + Into<u8> {
-    /// Proprietary type prefix used for grouping together keys under some
-    /// application and avoid namespace collision
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::hex_bytes"))]
-    pub prefix: Vec<u8>,
-    /// Custom proprietary subtype
-    pub subtype: Subtype,
-    /// Additional key bytes (like serialized public key data etc)
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::hex_bytes"))]
-    pub key: Vec<u8>,
-}
-
-impl fmt::Display for Key {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "type: {:#x}, key: ", self.type_value)?;
-        hex::format_hex(&self.key[..], f)
-    }
-}
-
-impl Decodable for Key {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let VarInt(byte_size): VarInt = Decodable::consensus_decode(&mut d)?;
-
-        if byte_size == 0 {
-            return Err(Error::NoMorePairs.into());
-        }
-
-        let key_byte_size: u64 = byte_size - 1;
-
-        if key_byte_size > MAX_VEC_SIZE as u64 {
-            return Err(encode::Error::OversizedVectorAllocation {
-                requested: key_byte_size as usize,
-                max: MAX_VEC_SIZE,
-            })
-        }
-
-        let type_value: u8 = Decodable::consensus_decode(&mut d)?;
-
-        let mut key = Vec::with_capacity(key_byte_size as usize);
-        for _ in 0..key_byte_size {
-            key.push(Decodable::consensus_decode(&mut d)?);
-        }
-
-        Ok(Key { type_value, key })
-    }
-}
-
-impl Encodable for Key {
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let mut len = 0;
-        len += VarInt((self.key.len() + 1) as u64).consensus_encode(&mut s)?;
-
-        len += self.type_value.consensus_encode(&mut s)?;
-
-        for key in &self.key {
-            len += key.consensus_encode(&mut s)?
-        }
-
-        Ok(len)
-    }
-}
-
-impl Encodable for Pair {
-    fn consensus_encode<S: io::Write>(&self, mut s: S) -> Result<usize, io::Error> {
-        let len = self.key.consensus_encode(&mut s)?;
-        Ok(len + self.value.consensus_encode(s)?)
-    }
-}
-
-impl Decodable for Pair {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        Ok(Pair {
-            key: Decodable::consensus_decode(&mut d)?,
-            value: Decodable::consensus_decode(d)?,
-        })
-    }
-}
-
-impl<Subtype> Encodable for ProprietaryKey<Subtype> where Subtype: Copy + From<u8> + Into<u8> {
-    fn consensus_encode<W: io::Write>(&self, mut e: W) -> Result<usize, io::Error> {
-        let mut len = self.prefix.consensus_encode(&mut e)? + 1;
-        e.emit_u8(self.subtype.into())?;
-        e.write_all(&self.key)?;
-        len += self.key.len();
-        Ok(len)
-    }
-}
-
-impl<Subtype> Decodable for ProprietaryKey<Subtype> where Subtype: Copy + From<u8> + Into<u8> {
-    fn consensus_decode<D: io::Read>(mut d: D) -> Result<Self, encode::Error> {
-        let prefix = Vec::<u8>::consensus_decode(&mut d)?;
-        let subtype = Subtype::from(d.read_u8()?);
-        let key = read_to_end(d)?;
-
-        Ok(ProprietaryKey { prefix, subtype, key })
-    }
-}
-
-impl<Subtype> ProprietaryKey<Subtype> where Subtype: Copy + From<u8> + Into<u8> {
-    /// Constructs [ProprietaryKey] from [Key]; returns
-    /// [Error::InvalidProprietaryKey] if `key` do not starts with 0xFC byte
-    pub fn from_key(key: Key) -> Result<Self, Error> {
-        if key.type_value != 0xFC {
-            return Err(Error::InvalidProprietaryKey)
-        }
-
-        Ok(deserialize(&key.key)?)
-    }
-
-    /// Constructs full [Key] corresponding to this proprietary key type
-    pub fn to_key(&self) -> Key {
-        Key {
-            type_value: 0xFC,
-            key: serialize(self)
-        }
-    }
-}
diff --git a/src/util/psbt/serialize.rs b/src/util/psbt/serialize.rs
deleted file mode 100644
index c6f277e66..000000000
--- a/src/util/psbt/serialize.rs
+++ /dev/null
@@ -1,414 +0,0 @@
-// Rust Bitcoin Library
-// Written by
-//   The Rust Bitcoin developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! PSBT serialization.
-//!
-//! Defines traits used for (de)serializing PSBT values into/from raw
-//! bytes from/as PSBT key-value pairs.
-//!
-
-use prelude::*;
-
-use io;
-
-use blockdata::script::Script;
-use blockdata::witness::Witness;
-use blockdata::transaction::{Transaction, txout::TxOut};
-use consensus::encode::{self, serialize, Decodable, Encodable, deserialize_partial};
-use secp256k1::{self, XOnlyPublicKey};
-use util::bip32::{ChildNumber, Fingerprint, KeySource};
-use hashes::{hash160, ripemd160, sha256, sha256d, Hash};
-use util::ecdsa::{EcdsaSig, EcdsaSigError};
-use util::psbt;
-use util::taproot::{TapBranchHash, TapLeafHash, ControlBlock, LeafVersion};
-use schnorr;
-use util::key::PublicKey;
-
-use super::map::{TapTree, PsbtSighashType};
-
-use util::taproot::TaprootBuilder;
-/// A trait for serializing a value as raw data for insertion into PSBT
-/// key-value pairs.
-pub trait Serialize {
-    /// Serialize a value as raw data.
-    fn serialize(&self) -> Vec<u8>;
-}
-
-/// A trait for deserializing a value from raw data in PSBT key-value pairs.
-pub trait Deserialize: Sized {
-    /// Deserialize a value from raw data.
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error>;
-}
-
-impl_psbt_de_serialize!(Transaction);
-impl_psbt_de_serialize!(TxOut);
-impl_psbt_de_serialize!(Witness);
-impl_psbt_hash_de_serialize!(ripemd160::Hash);
-impl_psbt_hash_de_serialize!(sha256::Hash);
-impl_psbt_hash_de_serialize!(TapLeafHash);
-impl_psbt_hash_de_serialize!(TapBranchHash);
-impl_psbt_hash_de_serialize!(hash160::Hash);
-impl_psbt_hash_de_serialize!(sha256d::Hash);
-
-// taproot
-impl_psbt_de_serialize!(Vec<TapLeafHash>);
-
-impl Serialize for Script {
-    fn serialize(&self) -> Vec<u8> {
-        self.to_bytes()
-    }
-}
-
-impl Deserialize for Script {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        Ok(Self::from(bytes.to_vec()))
-    }
-}
-
-impl Serialize for PublicKey {
-    fn serialize(&self) -> Vec<u8> {
-        let mut buf = Vec::new();
-        self.write_into(&mut buf).expect("vecs don't error");
-        buf
-    }
-}
-
-impl Deserialize for PublicKey {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        PublicKey::from_slice(bytes)
-            .map_err(|_| encode::Error::ParseFailed("invalid public key"))
-    }
-}
-
-impl Serialize for secp256k1::PublicKey {
-    fn serialize(&self) -> Vec<u8> {
-        self.serialize().to_vec()
-    }
-}
-
-impl Deserialize for secp256k1::PublicKey {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        secp256k1::PublicKey::from_slice(bytes)
-            .map_err(|_| encode::Error::ParseFailed("invalid public key"))
-    }
-}
-
-impl Serialize for EcdsaSig {
-    fn serialize(&self) -> Vec<u8> {
-        self.to_vec()
-    }
-}
-
-impl Deserialize for EcdsaSig {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        // NB: Since BIP-174 says "the signature as would be pushed to the stack from
-        // a scriptSig or witness" we should ideally use a consensus deserialization and do
-        // not error on a non-standard values. However,
-        //
-        // 1) the current implementation of from_consensus(`flag`) does not preserve
-        // the sighash byte `flag` mapping all unknown values to EcdsaSighashType::All or
-        // EcdsaSighashType::AllPlusAnyOneCanPay. Therefore, break the invariant
-        // EcdsaSig::from_slice(&sl[..]).to_vec = sl.
-        //
-        // 2) This would cause to have invalid signatures because the sighash message
-        // also has a field sighash_u32 (See BIP141). For example, when signing with non-standard
-        // 0x05, the sighash message would have the last field as 0x05u32 while, the verification
-        // would use check the signature assuming sighash_u32 as `0x01`.
-        EcdsaSig::from_slice(&bytes)
-            .map_err(|e| match e {
-                EcdsaSigError::EmptySignature => {
-                    encode::Error::ParseFailed("Empty partial signature data")
-                }
-                EcdsaSigError::NonStandardSighashType(flag) => {
-                    encode::Error::from(psbt::Error::NonStandardSighashType(flag))
-                }
-                EcdsaSigError::Secp256k1(..) => {
-                    encode::Error::ParseFailed("Invalid Ecdsa signature")
-                }
-                EcdsaSigError::HexEncoding(..) =>  {
-                    unreachable!("Decoding from slice, not hex")
-                }
-            })
-    }
-}
-
-impl Serialize for KeySource {
-    fn serialize(&self) -> Vec<u8> {
-        let mut rv: Vec<u8> = Vec::with_capacity(key_source_len(&self));
-
-        rv.append(&mut self.0.to_bytes().to_vec());
-
-        for cnum in self.1.into_iter() {
-            rv.append(&mut serialize(&u32::from(*cnum)))
-        }
-
-        rv
-    }
-}
-
-impl Deserialize for KeySource {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        if bytes.len() < 4 {
-            return Err(io::Error::from(io::ErrorKind::UnexpectedEof).into())
-        }
-
-        let fprint: Fingerprint = Fingerprint::from(&bytes[0..4]);
-        let mut dpath: Vec<ChildNumber> = Default::default();
-
-        let mut d = &bytes[4..];
-        while !d.is_empty() {
-            match u32::consensus_decode(&mut d) {
-                Ok(index) => dpath.push(index.into()),
-                Err(e) => return Err(e),
-            }
-        }
-
-        Ok((fprint, dpath.into()))
-    }
-}
-
-// partial sigs
-impl Serialize for Vec<u8> {
-    fn serialize(&self) -> Vec<u8> {
-        self.clone()
-    }
-}
-
-impl Deserialize for Vec<u8> {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        Ok(bytes.to_vec())
-    }
-}
-
-impl Serialize for PsbtSighashType {
-    fn serialize(&self) -> Vec<u8> {
-        serialize(&self.to_u32())
-    }
-}
-
-impl Deserialize for PsbtSighashType {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        let raw: u32 = encode::deserialize(bytes)?;
-        Ok(PsbtSighashType { inner: raw })
-    }
-}
-
-// Taproot related ser/deser
-impl Serialize for XOnlyPublicKey {
-    fn serialize(&self) -> Vec<u8> {
-        XOnlyPublicKey::serialize(&self).to_vec()
-    }
-}
-
-impl Deserialize for XOnlyPublicKey {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        XOnlyPublicKey::from_slice(bytes)
-            .map_err(|_| encode::Error::ParseFailed("Invalid xonly public key"))
-    }
-}
-
-impl Serialize for schnorr::SchnorrSig  {
-    fn serialize(&self) -> Vec<u8> {
-        self.to_vec()
-    }
-}
-
-impl Deserialize for schnorr::SchnorrSig {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        schnorr::SchnorrSig::from_slice(&bytes)
-            .map_err(|e| match e {
-                schnorr::SchnorrSigError::InvalidSighashType(flag) => {
-                    encode::Error::from(psbt::Error::NonStandardSighashType(flag as u32))
-                }
-                schnorr::SchnorrSigError::InvalidSchnorrSigSize(_) => {
-                    encode::Error::ParseFailed("Invalid Schnorr signature length")
-                }
-                schnorr::SchnorrSigError::Secp256k1(..) => {
-                    encode::Error::ParseFailed("Invalid Schnorr signature")
-                }
-            })
-    }
-}
-
-impl Serialize for (XOnlyPublicKey, TapLeafHash) {
-    fn serialize(&self) -> Vec<u8> {
-        let ser_pk = self.0.serialize();
-        let mut buf = Vec::with_capacity(ser_pk.len() + self.1.as_ref().len());
-        buf.extend(&ser_pk);
-        buf.extend(self.1.as_ref());
-        buf
-    }
-}
-
-impl Deserialize for (XOnlyPublicKey, TapLeafHash) {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        if bytes.len() < 32 {
-            return Err(io::Error::from(io::ErrorKind::UnexpectedEof).into())
-        }
-        let a: XOnlyPublicKey = Deserialize::deserialize(&bytes[..32])?;
-        let b: TapLeafHash = Deserialize::deserialize(&bytes[32..])?;
-        Ok((a, b))
-    }
-}
-
-impl Serialize for ControlBlock {
-    fn serialize(&self) -> Vec<u8> {
-        ControlBlock::serialize(&self)
-    }
-}
-
-impl Deserialize for ControlBlock {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        Self::from_slice(bytes)
-            .map_err(|_| encode::Error::ParseFailed("Invalid control block"))
-    }
-}
-
-// Versioned Script
-impl Serialize for (Script, LeafVersion) {
-    fn serialize(&self) -> Vec<u8> {
-        let mut buf = Vec::with_capacity(self.0.len() + 1);
-        buf.extend(self.0.as_bytes());
-        buf.push(self.1.to_consensus());
-        buf
-    }
-}
-
-impl Deserialize for (Script, LeafVersion) {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        if bytes.is_empty() {
-            return Err(io::Error::from(io::ErrorKind::UnexpectedEof).into())
-        }
-        // The last byte is LeafVersion.
-        let script = Script::deserialize(&bytes[..bytes.len() - 1])?;
-        let leaf_ver = LeafVersion::from_consensus(bytes[bytes.len() - 1])
-            .map_err(|_| encode::Error::ParseFailed("invalid leaf version"))?;
-        Ok((script, leaf_ver))
-    }
-}
-
-
-impl Serialize for (Vec<TapLeafHash>, KeySource) {
-    fn serialize(&self) -> Vec<u8> {
-        let mut buf = Vec::with_capacity( 32 * self.0.len() + key_source_len(&self.1));
-        self.0.consensus_encode(&mut buf).expect("Vecs don't error allocation");
-        // TODO: Add support for writing into a writer for key-source
-        buf.extend(self.1.serialize());
-        buf
-    }
-}
-
-impl Deserialize for (Vec<TapLeafHash>, KeySource) {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        let (leafhash_vec, consumed) = deserialize_partial::<Vec<TapLeafHash>>(&bytes)?;
-        let key_source = KeySource::deserialize(&bytes[consumed..])?;
-        Ok((leafhash_vec, key_source))
-    }
-}
-
-impl Serialize for TapTree {
-    fn serialize(&self) -> Vec<u8> {
-        match (self.0.branch().len(), self.0.branch().last()) {
-            (1, Some(Some(root))) => {
-                let mut buf = Vec::new();
-                for leaf_info in root.leaves.iter() {
-                    // # Cast Safety:
-                    //
-                    // TaprootMerkleBranch can only have len atmost 128(TAPROOT_CONTROL_MAX_NODE_COUNT).
-                    // safe to cast from usize to u8
-                    buf.push(leaf_info.merkle_branch().as_inner().len() as u8);
-                    buf.push(leaf_info.leaf_version().to_consensus());
-                    leaf_info.script().consensus_encode(&mut buf).expect("Vecs dont err");
-                }
-                buf
-            }
-        // This should be unreachable as we Taptree is already finalized
-            _ => unreachable!(),
-        }
-    }
-}
-
-impl Deserialize for TapTree {
-    fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        let mut builder = TaprootBuilder::new();
-        let mut bytes_iter = bytes.iter();
-        while let Some(depth) = bytes_iter.next() {
-            let version = bytes_iter.next().ok_or(encode::Error::ParseFailed("Invalid Taproot Builder"))?;
-            let (script, consumed) = deserialize_partial::<Script>(bytes_iter.as_slice())?;
-            if consumed > 0 {
-                bytes_iter.nth(consumed - 1);
-            }
-
-            let leaf_version = LeafVersion::from_consensus(*version)
-                .map_err(|_| encode::Error::ParseFailed("Leaf Version Error"))?;
-            builder = builder.add_leaf_with_ver(*depth, script, leaf_version)
-                .map_err(|_| encode::Error::ParseFailed("Tree not in DFS order"))?;
-        }
-        if builder.is_finalized() && !builder.has_hidden_nodes() {
-            Ok(TapTree(builder))
-        } else {
-            Err(encode::Error::ParseFailed("Incomplete taproot Tree"))
-        }
-    }
-}
-
-// Helper function to compute key source len
-fn key_source_len(key_source: &KeySource) -> usize {
-    4 + 4 * (key_source.1).as_ref().len()
-}
-
-#[cfg(test)]
-mod tests {
-    use hashes::hex::FromHex;
-    use super::*;
-
-    // Composes tree matching a given depth map, filled with dumb script leafs,
-    // each of which consists of a single push-int op code, with int value
-    // increased for each consecutive leaf.
-    pub fn compose_taproot_builder<'map>(opcode: u8, depth_map: impl IntoIterator<Item = &'map u8>) -> TaprootBuilder {
-        let mut val = opcode;
-        let mut builder = TaprootBuilder::new();
-        for depth in depth_map {
-            let script = Script::from_hex(&format!("{:02x}", val)).unwrap();
-            builder = builder.add_leaf(*depth, script).unwrap();
-            let (new_val, _) = val.overflowing_add(1);
-            val = new_val;
-        }
-        builder
-    }
-
-    #[test]
-    fn taptree_hidden() {
-        let mut builder = compose_taproot_builder(0x51, &[2, 2, 2]);
-        builder = builder.add_leaf_with_ver(3, Script::from_hex("b9").unwrap(), LeafVersion::from_consensus(0xC2).unwrap()).unwrap();
-        builder = builder.add_hidden_node(3, sha256::Hash::default()).unwrap();
-        assert!(TapTree::from_builder(builder.clone()).is_err());
-    }
-
-    #[test]
-    fn taptree_roundtrip() {
-        let mut builder = compose_taproot_builder(0x51, &[2, 2, 2, 3]);
-        builder = builder.add_leaf_with_ver(3, Script::from_hex("b9").unwrap(), LeafVersion::from_consensus(0xC2).unwrap()).unwrap();
-        let tree = TapTree::from_builder(builder).unwrap();
-        let tree_prime = TapTree::deserialize(&tree.serialize()).unwrap();
-        assert_eq!(tree, tree_prime);
-    }
-
-    #[test]
-    fn can_deserialize_non_standard_psbt_sighash_type() {
-        let non_standard_sighash = [222u8, 0u8, 0u8, 0u8]; // 32 byte value.
-        let sighash = PsbtSighashType::deserialize(&non_standard_sighash);
-        assert!(sighash.is_ok())
-    }
-}
diff --git a/src/util/schnorr.rs b/src/util/schnorr.rs
deleted file mode 100644
index 59d67ac5d..000000000
--- a/src/util/schnorr.rs
+++ /dev/null
@@ -1,298 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Schnorr Bitcoin keys.
-//!
-//! This module provides Schnorr keys used in Bitcoin, reexporting Secp256k1
-//! Schnorr key types.
-//!
-
-use core::fmt;
-use prelude::*;
-
-use secp256k1::{self, Secp256k1, Verification, constants};
-use util::taproot::{TapBranchHash, TapTweakHash};
-use SchnorrSighashType;
-
-/// Deprecated re-export of [`secp256k1::XOnlyPublicKey`]
-#[deprecated(since = "0.28.0", note = "Please use `util::key::XOnlyPublicKey` instead")]
-pub type XOnlyPublicKey = secp256k1::XOnlyPublicKey;
-
-/// Deprecated re-export of [`secp256k1::KeyPair`]
-#[deprecated(since = "0.28.0", note = "Please use `util::key::KeyPair` instead")]
-pub type KeyPair = secp256k1::KeyPair;
-
-/// Untweaked BIP-340 X-coord-only public key
-pub type UntweakedPublicKey = ::XOnlyPublicKey;
-
-/// Tweaked BIP-340 X-coord-only public key
-#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(transparent))]
-pub struct TweakedPublicKey(::XOnlyPublicKey);
-
-impl fmt::LowerHex for TweakedPublicKey {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::LowerHex::fmt(&self.0, f)
-    }
-}
-
-impl fmt::Display for TweakedPublicKey {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Display::fmt(&self.0, f)
-    }
-}
-
-/// Untweaked BIP-340 key pair
-pub type UntweakedKeyPair = ::KeyPair;
-
-/// Tweaked BIP-340 key pair
-#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(transparent))]
-pub struct TweakedKeyPair(::KeyPair);
-
-/// A trait for tweaking BIP340 key types (x-only public keys and key pairs).
-pub trait TapTweak {
-    /// Tweaked key type with optional auxiliary information
-    type TweakedAux;
-    /// Tweaked key type
-    type TweakedKey;
-
-    /// Tweaks an untweaked key with corresponding public key value and optional script tree merkle
-    /// root. For the [`KeyPair`] type this also tweaks the private key in the pair.
-    ///
-    /// This is done by using the equation Q = P + H(P|c)G, where
-    ///  * Q is the tweaked public key
-    ///  * P is the internal public key
-    ///  * H is the hash function
-    ///  * c is the commitment data
-    ///  * G is the generator point
-    ///
-    /// # Returns
-    /// The tweaked key and its parity.
-    fn tap_tweak<C: Verification>(self, secp: &Secp256k1<C>, merkle_root: Option<TapBranchHash>) -> Self::TweakedAux;
-
-    /// Directly converts an [`UntweakedPublicKey`] to a [`TweakedPublicKey`]
-    ///
-    /// This method is dangerous and can lead to loss of funds if used incorrectly.
-    /// Specifically, in multi-party protocols a peer can provide a value that allows them to steal.
-    fn dangerous_assume_tweaked(self) -> Self::TweakedKey;
-}
-
-impl TapTweak for UntweakedPublicKey {
-    type TweakedAux = (TweakedPublicKey, secp256k1::Parity);
-    type TweakedKey = TweakedPublicKey;
-
-    /// Tweaks an untweaked public key with corresponding public key value and optional script tree
-    /// merkle root.
-    ///
-    /// This is done by using the equation Q = P + H(P|c)G, where
-    ///  * Q is the tweaked public key
-    ///  * P is the internal public key
-    ///  * H is the hash function
-    ///  * c is the commitment data
-    ///  * G is the generator point
-    ///
-    /// # Returns
-    /// The tweaked key and its parity.
-    fn tap_tweak<C: Verification>(self, secp: &Secp256k1<C>, merkle_root: Option<TapBranchHash>) -> (TweakedPublicKey, secp256k1::Parity) {
-        let tweak = TapTweakHash::from_key_and_tweak(self, merkle_root).to_scalar();
-        let (output_key, parity) = self.add_tweak(secp, &tweak).expect("Tap tweak failed");
-
-        debug_assert!(self.tweak_add_check(secp, &output_key, parity, tweak));
-        (TweakedPublicKey(output_key), parity)
-    }
-
-    fn dangerous_assume_tweaked(self) -> TweakedPublicKey {
-        TweakedPublicKey(self)
-    }
-}
-
-impl TapTweak for UntweakedKeyPair {
-    type TweakedAux = TweakedKeyPair;
-    type TweakedKey = TweakedKeyPair;
-
-    /// Tweaks private and public keys within an untweaked [`KeyPair`] with corresponding public key
-    /// value and optional script tree merkle root.
-    ///
-    /// This is done by tweaking private key within the pair using the equation q = p + H(P|c), where
-    ///  * q is the tweaked private key
-    ///  * p is the internal private key
-    ///  * H is the hash function
-    ///  * c is the commitment data
-    /// The public key is generated from a private key by multiplying with generator point, Q = qG.
-    ///
-    /// # Returns
-    /// The tweaked key and its parity.
-    fn tap_tweak<C: Verification>(self, secp: &Secp256k1<C>, merkle_root: Option<TapBranchHash>) -> TweakedKeyPair {
-        let (pubkey, _parity) = crate::XOnlyPublicKey::from_keypair(&self);
-        let tweak = TapTweakHash::from_key_and_tweak(pubkey, merkle_root).to_scalar();
-        let tweaked = self.add_xonly_tweak(secp, &tweak).expect("Tap tweak failed");
-        TweakedKeyPair(tweaked)
-    }
-
-    fn dangerous_assume_tweaked(self) -> TweakedKeyPair {
-        TweakedKeyPair(self)
-    }
-}
-
-impl TweakedPublicKey {
-    /// Creates a new [`TweakedPublicKey`] from a [`XOnlyPublicKey`]. No tweak is applied, consider
-    /// calling `tap_tweak` on an [`UntweakedPublicKey`] instead of using this constructor.
-    ///
-    /// This method is dangerous and can lead to loss of funds if used incorrectly.
-    /// Specifically, in multi-party protocols a peer can provide a value that allows them to steal.
-    #[inline]
-    pub fn dangerous_assume_tweaked(key: ::XOnlyPublicKey) -> TweakedPublicKey {
-        TweakedPublicKey(key)
-    }
-
-    /// Returns the underlying public key.
-    pub fn to_inner(self) -> ::XOnlyPublicKey {
-        self.0
-    }
-
-    /// Returns a reference to underlying public key.
-    pub fn as_inner(&self) -> &::XOnlyPublicKey {
-        &self.0
-    }
-
-    /// Serialize the key as a byte-encoded pair of values. In compressed form
-    /// the y-coordinate is represented by only a single bit, as x determines
-    /// it up to one bit.
-    #[inline]
-    pub fn serialize(&self) -> [u8; constants::SCHNORR_PUBLIC_KEY_SIZE] {
-        self.0.serialize()
-    }
-}
-
-impl TweakedKeyPair {
-    /// Creates a new [`TweakedKeyPair`] from a [`KeyPair`]. No tweak is applied, consider
-    /// calling `tap_tweak` on an [`UntweakedKeyPair`] instead of using this constructor.
-    ///
-    /// This method is dangerous and can lead to loss of funds if used incorrectly.
-    /// Specifically, in multi-party protocols a peer can provide a value that allows them to steal.
-    #[inline]
-    pub fn dangerous_assume_tweaked(pair: ::KeyPair) -> TweakedKeyPair {
-        TweakedKeyPair(pair)
-    }
-
-    /// Returns the underlying key pair
-    #[inline]
-    pub fn into_inner(self) -> ::KeyPair {
-        self.0
-    }
-}
-
-impl From<TweakedPublicKey> for ::XOnlyPublicKey {
-    #[inline]
-    fn from(pair: TweakedPublicKey) -> Self {
-        pair.0
-    }
-}
-
-impl From<TweakedKeyPair> for ::KeyPair {
-    #[inline]
-    fn from(pair: TweakedKeyPair) -> Self {
-        pair.0
-    }
-}
-
-/// A BIP340-341 serialized schnorr signature with the corresponding hash type.
-#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct SchnorrSig {
-    /// The underlying schnorr signature
-    pub sig: secp256k1::schnorr::Signature,
-    /// The corresponding hash type
-    pub hash_ty: SchnorrSighashType,
-}
-
-impl SchnorrSig {
-    /// Deserialize from slice
-    pub fn from_slice(sl: &[u8]) -> Result<Self, SchnorrSigError> {
-        match sl.len() {
-            64 => {
-                // default type
-                let sig = secp256k1::schnorr::Signature::from_slice(sl)
-                    .map_err(SchnorrSigError::Secp256k1)?;
-                return Ok( SchnorrSig { sig, hash_ty : SchnorrSighashType::Default });
-            },
-            65 => {
-                let (hash_ty, sig) = sl.split_last().expect("Slice len checked == 65");
-                let hash_ty = SchnorrSighashType::from_u8(*hash_ty)
-                    .map_err(|_| SchnorrSigError::InvalidSighashType(*hash_ty))?;
-                let sig = secp256k1::schnorr::Signature::from_slice(sig)
-                    .map_err(SchnorrSigError::Secp256k1)?;
-                Ok(SchnorrSig { sig, hash_ty })
-            }
-            len => {
-                Err(SchnorrSigError::InvalidSchnorrSigSize(len))
-            }
-        }
-    }
-
-    /// Serialize SchnorrSig
-    pub fn to_vec(&self) -> Vec<u8> {
-        // TODO: add support to serialize to a writer to SerializedSig
-        let mut ser_sig = self.sig.as_ref().to_vec();
-        if self.hash_ty == SchnorrSighashType::Default {
-            // default sighash type, don't add extra sighash byte
-        } else {
-            ser_sig.push(self.hash_ty as u8);
-        }
-        ser_sig
-    }
-
-}
-
-/// A schnorr sig related error.
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-pub enum SchnorrSigError {
-    /// Base58 encoding error
-    InvalidSighashType(u8),
-    /// Signature has valid size but does not parse correctly
-    Secp256k1(secp256k1::Error),
-    /// Invalid schnorr signature size
-    InvalidSchnorrSigSize(usize),
-}
-
-
-impl fmt::Display for SchnorrSigError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            SchnorrSigError::InvalidSighashType(hash_ty) =>
-                write!(f, "Invalid signature hash type {}", hash_ty),
-            SchnorrSigError::Secp256k1(ref e) =>
-                write!(f, "Schnorr Signature has correct len, but is malformed : {}", e),
-            SchnorrSigError::InvalidSchnorrSigSize(sz) =>
-                write!(f, "Invalid Schnorr signature size: {}", sz),
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl ::std::error::Error for SchnorrSigError {}
-
-impl From<secp256k1::Error> for SchnorrSigError {
-
-    fn from(e: secp256k1::Error) -> SchnorrSigError {
-        SchnorrSigError::Secp256k1(e)
-    }
-}
diff --git a/src/util/sighash.rs b/src/util/sighash.rs
deleted file mode 100644
index 4436dd2c6..000000000
--- a/src/util/sighash.rs
+++ /dev/null
@@ -1,1199 +0,0 @@
-// Rust Dash Library
-// Written in 2021 by
-//   The rust-bitcoin developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Generalized, efficient, signature hash implementation.
-//!
-//! Implementation of the algorithm to compute the message to be signed according to
-//! [Bip341](https://github.com/bitcoin/bips/blob/150ab6f5c3aca9da05fccc5b435e9667853407f4/bip-0341.mediawiki),
-//! [Bip143](https://github.com/bitcoin/bips/blob/99701f68a88ce33b2d0838eb84e115cef505b4c2/bip-0143.mediawiki)
-//! and legacy (before Bip143).
-//!
-
-use prelude::*;
-
-pub use blockdata::transaction::{hash_type::EcdsaSighashType};
-use blockdata::witness::Witness;
-use consensus::{encode, Encodable};
-use core::{str, fmt};
-use core::ops::{Deref, DerefMut};
-use core::borrow::Borrow;
-use hashes::{sha256, sha256d, Hash};
-use ::{io, Transaction};
-use blockdata::transaction::txout::TxOut;
-use util::taproot::{TapLeafHash, TAPROOT_ANNEX_PREFIX, TapSighashHash};
-use ::{Script, Sighash};
-use blockdata::transaction::hash_type::SighashTypeParseError;
-
-use super::taproot::LeafVersion;
-
-/// Efficiently calculates signature hash message for legacy, segwit and taproot inputs.
-#[derive(Debug)]
-pub struct SighashCache<T: Deref<Target=Transaction>> {
-    /// Access to transaction required for various introspection, moreover type
-    /// `T: Deref<Target=Transaction>` allows to accept borrow and mutable borrow, the
-    /// latter in particular is necessary for [`SighashCache::witness_mut`]
-    tx: T,
-
-    /// Common cache for taproot and segwit inputs. It's an option because it's not needed for legacy inputs
-    common_cache: Option<CommonCache>,
-
-    /// Cache for segwit v0 inputs, it's the result of another round of sha256 on `common_cache`
-    segwit_cache: Option<SegwitCache>,
-
-    /// Cache for taproot v1 inputs
-    taproot_cache: Option<TaprootCache>,
-}
-
-/// Values cached common between segwit and taproot inputs
-#[derive(Debug)]
-struct CommonCache {
-    prevouts: sha256::Hash,
-    sequences: sha256::Hash,
-
-    /// in theory, `outputs` could be `Option` since `NONE` and `SINGLE` doesn't need it, but since
-    /// `ALL` is the mostly used variant by large, we don't bother
-    outputs: sha256::Hash,
-}
-
-/// Values cached for segwit inputs, it's equal to [`CommonCache`] plus another round of `sha256`
-#[derive(Debug)]
-struct SegwitCache {
-    prevouts: sha256d::Hash,
-    sequences: sha256d::Hash,
-    outputs: sha256d::Hash,
-}
-
-/// Values cached for taproot inputs
-#[derive(Debug)]
-struct TaprootCache {
-    amounts: sha256::Hash,
-    script_pubkeys: sha256::Hash,
-}
-
-/// Contains outputs of previous transactions.
-/// In the case [`SchnorrSighashType`] variant is `ANYONECANPAY`, [`Prevouts::One`] may be provided
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-pub enum Prevouts<'u, T> where T: 'u + Borrow<TxOut> {
-    /// `One` variant allows to provide the single Prevout needed. It's useful for example
-    /// when modifier `ANYONECANPAY` is provided, only prevout of the current input is needed.
-    /// The first `usize` argument is the input index this [`TxOut`] is referring to.
-    One(usize, T),
-    /// When `ANYONECANPAY` is not provided, or the caller is handy giving all prevouts so the same
-    /// variable can be used for multiple inputs.
-    All(&'u [T]),
-}
-
-const KEY_VERSION_0: u8 = 0u8;
-
-/// Information related to the script path spending
-///
-/// This can be hashed into a [`TapLeafHash`].
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-pub struct ScriptPath<'s> {
-    script: &'s Script,
-    leaf_version: LeafVersion,
-}
-
-/// Hashtype of an input's signature, encoded in the last byte of the signature
-/// Fixed values so they can be casted as integer types for encoding
-#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-pub enum SchnorrSighashType {
-    /// 0x0: Used when not explicitly specified, defaulting to [`SchnorrSighashType::All`]
-    Default = 0x00,
-    /// 0x1: Sign all outputs
-    All = 0x01,
-    /// 0x2: Sign no outputs --- anyone can choose the destination
-    None = 0x02,
-    /// 0x3: Sign the output whose index matches this input's index. If none exists,
-    /// sign the hash `0000000000000000000000000000000000000000000000000000000000000001`.
-    /// (This rule is probably an unintentional C++ism, but it's consensus so we have
-    /// to follow it.)
-    Single = 0x03,
-    /// 0x81: Sign all outputs but only this input
-    AllPlusAnyoneCanPay = 0x81,
-    /// 0x82: Sign no outputs and only this input
-    NonePlusAnyoneCanPay = 0x82,
-    /// 0x83: Sign one output and only this input (see `Single` for what "one output" means)
-    SinglePlusAnyoneCanPay = 0x83,
-
-    /// Reserved for future use, `#[non_exhaustive]` is not available with current MSRV
-    Reserved = 0xFF,
-}
-serde_string_impl!(SchnorrSighashType, "a SchnorrSighashType data");
-
-impl fmt::Display for SchnorrSighashType {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        let s = match self {
-            SchnorrSighashType::Default => "SIGHASH_DEFAULT",
-            SchnorrSighashType::All => "SIGHASH_ALL",
-            SchnorrSighashType::None => "SIGHASH_NONE",
-            SchnorrSighashType::Single => "SIGHASH_SINGLE",
-            SchnorrSighashType::AllPlusAnyoneCanPay => "SIGHASH_ALL|SIGHASH_ANYONECANPAY",
-            SchnorrSighashType::NonePlusAnyoneCanPay => "SIGHASH_NONE|SIGHASH_ANYONECANPAY",
-            SchnorrSighashType::SinglePlusAnyoneCanPay => "SIGHASH_SINGLE|SIGHASH_ANYONECANPAY",
-            SchnorrSighashType::Reserved => "SIGHASH_RESERVED",
-        };
-        f.write_str(s)
-    }
-}
-
-impl str::FromStr for SchnorrSighashType {
-    type Err = SighashTypeParseError;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s {
-            "SIGHASH_DEFAULT" => Ok(SchnorrSighashType::Default),
-            "SIGHASH_ALL" => Ok(SchnorrSighashType::All),
-            "SIGHASH_NONE" => Ok(SchnorrSighashType::None),
-            "SIGHASH_SINGLE" => Ok(SchnorrSighashType::Single),
-            "SIGHASH_ALL|SIGHASH_ANYONECANPAY" => Ok(SchnorrSighashType::AllPlusAnyoneCanPay),
-            "SIGHASH_NONE|SIGHASH_ANYONECANPAY" => Ok(SchnorrSighashType::NonePlusAnyoneCanPay),
-            "SIGHASH_SINGLE|SIGHASH_ANYONECANPAY" => Ok(SchnorrSighashType::SinglePlusAnyoneCanPay),
-            "SIGHASH_RESERVED" => Ok(SchnorrSighashType::Reserved),
-            _ => Err(SighashTypeParseError{ unrecognized: s.to_owned() }),
-        }
-    }
-}
-
-/// Possible errors in computing the signature message
-#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-pub enum Error {
-    /// Could happen only by using `*_encode_signing_*` methods with custom writers, engines writers
-    /// like the ones used in methods `*_signature_hash` don't error
-    Io(io::ErrorKind),
-
-    /// Requested index is greater or equal than the number of inputs in the transaction
-    IndexOutOfInputsBounds {
-        /// Requested index
-        index: usize,
-        /// Number of transaction inputs
-        inputs_size: usize,
-    },
-
-    /// Using SIGHASH_SINGLE without a "corresponding output" (an output with the same index as the
-    /// input being verified) is a validation failure
-    SingleWithoutCorrespondingOutput {
-        /// Requested index
-        index: usize,
-        /// Number of transaction outputs
-        outputs_size: usize,
-    },
-
-    /// There are mismatches in the number of prevouts provided compared with the number of
-    /// inputs in the transaction
-    PrevoutsSize,
-
-    /// Requested a prevout index which is greater than the number of prevouts provided or a
-    /// [`Prevouts::One`] with different index
-    PrevoutIndex,
-
-    /// A single prevout has been provided but all prevouts are needed without `ANYONECANPAY`
-    PrevoutKind,
-
-    /// Annex must be at least one byte long and the first bytes must be `0x50`
-    WrongAnnex,
-
-    /// Invalid Sighash type
-    InvalidSighashType(u32),
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            Error::Io(ref e) => write!(f, "Writer errored: {:?}", e),
-            Error::IndexOutOfInputsBounds { index, inputs_size } => write!(f, "Requested index ({}) is greater or equal than the number of transaction inputs ({})", index, inputs_size),
-            Error::SingleWithoutCorrespondingOutput { index, outputs_size } => write!(f, "SIGHASH_SINGLE for input ({}) haven't a corresponding output (#outputs:{})", index, outputs_size),
-            Error::PrevoutsSize => write!(f, "Number of supplied prevouts differs from the number of inputs in transaction"),
-            Error::PrevoutIndex => write!(f, "The index requested is greater than available prevouts or different from the provided [Provided::Anyone] index"),
-            Error::PrevoutKind => write!(f, "A single prevout has been provided but all prevouts are needed without `ANYONECANPAY`"),
-            Error::WrongAnnex => write!(f, "Annex must be at least one byte long and the first bytes must be `0x50`"),
-            Error::InvalidSighashType(hash_ty) => write!(f, "Invalid schnorr Signature hash type : {} ", hash_ty),
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-impl ::std::error::Error for Error {}
-
-impl<'u, T> Prevouts<'u, T> where T: Borrow<TxOut> {
-    fn check_all(&self, tx: &Transaction) -> Result<(), Error> {
-        if let Prevouts::All(prevouts) = self {
-            if prevouts.len() != tx.input.len() {
-                return Err(Error::PrevoutsSize);
-            }
-        }
-        Ok(())
-    }
-
-    fn get_all(&self) -> Result<&[T], Error> {
-        match self {
-            Prevouts::All(prevouts) => Ok(*prevouts),
-            _ => Err(Error::PrevoutKind),
-        }
-    }
-
-    fn get(&self, input_index: usize) -> Result<&TxOut, Error> {
-        match self {
-            Prevouts::One(index, prevout) => {
-                if input_index == *index {
-                    Ok(prevout.borrow())
-                } else {
-                    Err(Error::PrevoutIndex)
-                }
-            }
-            Prevouts::All(prevouts) => prevouts
-                .get(input_index)
-                .map(|x| x.borrow())
-                .ok_or(Error::PrevoutIndex),
-        }
-    }
-}
-
-impl<'s> ScriptPath<'s> {
-    /// Create a new ScriptPath structure
-    pub fn new(script: &'s Script, leaf_version: LeafVersion) -> Self {
-        ScriptPath {
-            script,
-            leaf_version,
-        }
-    }
-    /// Create a new ScriptPath structure using default leaf version value
-    pub fn with_defaults(script: &'s Script) -> Self {
-        Self::new(script, LeafVersion::TapScript)
-    }
-    /// Compute the leaf hash
-    pub fn leaf_hash(&self) -> TapLeafHash {
-        let mut enc = TapLeafHash::engine();
-
-        self.leaf_version.to_consensus().consensus_encode(&mut enc).expect("Writing to hash enging should never fail");
-        self.script.consensus_encode(&mut enc).expect("Writing to hash enging should never fail");
-
-        TapLeafHash::from_engine(enc)
-    }
-}
-
-impl<'s> From<ScriptPath<'s>> for TapLeafHash {
-    fn from(script_path: ScriptPath<'s>) -> TapLeafHash {
-        script_path.leaf_hash()
-    }
-}
-
-impl From<EcdsaSighashType> for SchnorrSighashType {
-    fn from(s: EcdsaSighashType) -> Self {
-        match s {
-            EcdsaSighashType::All => SchnorrSighashType::All,
-            EcdsaSighashType::None => SchnorrSighashType::None,
-            EcdsaSighashType::Single => SchnorrSighashType::Single,
-            EcdsaSighashType::AllPlusAnyoneCanPay => SchnorrSighashType::AllPlusAnyoneCanPay,
-            EcdsaSighashType::NonePlusAnyoneCanPay => SchnorrSighashType::NonePlusAnyoneCanPay,
-            EcdsaSighashType::SinglePlusAnyoneCanPay => SchnorrSighashType::SinglePlusAnyoneCanPay,
-        }
-    }
-}
-
-impl SchnorrSighashType {
-    /// Break the sighash flag into the "real" sighash flag and the ANYONECANPAY boolean
-    pub(crate) fn split_anyonecanpay_flag(self) -> (SchnorrSighashType, bool) {
-        match self {
-            SchnorrSighashType::Default => (SchnorrSighashType::Default, false),
-            SchnorrSighashType::All => (SchnorrSighashType::All, false),
-            SchnorrSighashType::None => (SchnorrSighashType::None, false),
-            SchnorrSighashType::Single => (SchnorrSighashType::Single, false),
-            SchnorrSighashType::AllPlusAnyoneCanPay => (SchnorrSighashType::All, true),
-            SchnorrSighashType::NonePlusAnyoneCanPay => (SchnorrSighashType::None, true),
-            SchnorrSighashType::SinglePlusAnyoneCanPay => (SchnorrSighashType::Single, true),
-            SchnorrSighashType::Reserved => (SchnorrSighashType::Reserved, false),
-        }
-    }
-
-    /// Create a [`SchnorrSighashType`] from raw `u8`
-    pub fn from_u8(hash_ty: u8) -> Result<Self, Error> {
-        match hash_ty {
-            0x00 => Ok(SchnorrSighashType::Default),
-            0x01 => Ok(SchnorrSighashType::All),
-            0x02 => Ok(SchnorrSighashType::None),
-            0x03 => Ok(SchnorrSighashType::Single),
-            0x81 => Ok(SchnorrSighashType::AllPlusAnyoneCanPay),
-            0x82 => Ok(SchnorrSighashType::NonePlusAnyoneCanPay),
-            0x83 => Ok(SchnorrSighashType::SinglePlusAnyoneCanPay),
-            0xFF => Ok(SchnorrSighashType::Reserved),
-            x => Err(Error::InvalidSighashType(x as u32)),
-        }
-    }
-}
-
-impl<R: Deref<Target=Transaction>> SighashCache<R> {
-    /// Compute the sighash components from an unsigned transaction and auxiliary
-    /// in a lazy manner when required.
-    /// For the generated sighashes to be valid, no fields in the transaction may change except for
-    /// script_sig and witnesses.
-    pub fn new(tx: R) -> Self {
-        SighashCache {
-            tx,
-            common_cache: None,
-            taproot_cache: None,
-            segwit_cache: None,
-        }
-    }
-
-    /// Encode the BIP341 signing data for any flag type into a given object implementing a
-    /// io::Write trait.
-    pub fn taproot_encode_signing_data_to<Write: io::Write, T: Borrow<TxOut>>(
-        &mut self,
-        mut writer: Write,
-        input_index: usize,
-        prevouts: &Prevouts<T>,
-        annex: Option<Annex>,
-        leaf_hash_code_separator: Option<(TapLeafHash, u32)>,
-        sighash_type: SchnorrSighashType,
-    ) -> Result<(), Error> {
-        prevouts.check_all(&self.tx)?;
-
-        let (sighash, anyone_can_pay) = sighash_type.split_anyonecanpay_flag();
-
-        // epoch
-        0u8.consensus_encode(&mut writer)?;
-
-        // * Control:
-        // hash_type (1).
-        (sighash_type as u8).consensus_encode(&mut writer)?;
-
-        // * Transaction Data:
-        // nVersion (2): the nVersion of the transaction.
-        self.tx.version.consensus_encode(&mut writer)?;
-
-        // nTransactionType (2): the nTxType of the transaction.
-        (self.tx.tx_type() as u16).consensus_encode(&mut writer)?;
-
-        // nLockTime (4): the nLockTime of the transaction.
-        self.tx.lock_time.consensus_encode(&mut writer)?;
-
-        // nSpecialTransactionPayload
-        if let Some(payload) = &self.tx.special_transaction_payload {
-            let mut buf = Vec::new();
-            payload.consensus_encode(&mut buf)?;
-            // this is so we get the size of the payload
-            buf.consensus_encode(&mut writer)?;
-        }
-
-        // If the hash_type & 0x80 does not equal SIGHASH_ANYONECANPAY:
-        //     sha_prevouts (32): the SHA256 of the serialization of all input outpoints.
-        //     sha_amounts (32): the SHA256 of the serialization of all spent output amounts.
-        //     sha_scriptpubkeys (32): the SHA256 of the serialization of all spent output scriptPubKeys.
-        //     sha_sequences (32): the SHA256 of the serialization of all input nSequence.
-        if !anyone_can_pay {
-            self.common_cache().prevouts.consensus_encode(&mut writer)?;
-            self.taproot_cache(prevouts.get_all()?)
-                .amounts
-                .consensus_encode(&mut writer)?;
-            self.taproot_cache(prevouts.get_all()?)
-                .script_pubkeys
-                .consensus_encode(&mut writer)?;
-            self.common_cache()
-                .sequences
-                .consensus_encode(&mut writer)?;
-        }
-
-        // If hash_type & 3 does not equal SIGHASH_NONE or SIGHASH_SINGLE:
-        //     sha_outputs (32): the SHA256 of the serialization of all outputs in CTxOut format.
-        if sighash != SchnorrSighashType::None && sighash != SchnorrSighashType::Single {
-            self.common_cache().outputs.consensus_encode(&mut writer)?;
-        }
-
-        // * Data about this input:
-        // spend_type (1): equal to (ext_flag * 2) + annex_present, where annex_present is 0
-        // if no annex is present, or 1 otherwise
-        let mut spend_type = 0u8;
-        if annex.is_some() {
-            spend_type |= 1u8;
-        }
-        if leaf_hash_code_separator.is_some() {
-            spend_type |= 2u8;
-        }
-        spend_type.consensus_encode(&mut writer)?;
-
-        // If hash_type & 0x80 equals SIGHASH_ANYONECANPAY:
-        //      outpoint (36): the COutPoint of this input (32-byte hash + 4-byte little-endian).
-        //      amount (8): value of the previous output spent by this input.
-        //      scriptPubKey (35): scriptPubKey of the previous output spent by this input, serialized as script inside CTxOut. Its size is always 35 bytes.
-        //      nSequence (4): nSequence of this input.
-        if anyone_can_pay {
-            let txin =
-                &self
-                    .tx
-                    .input
-                    .get(input_index)
-                    .ok_or_else(|| Error::IndexOutOfInputsBounds {
-                        index: input_index,
-                        inputs_size: self.tx.input.len(),
-                    })?;
-            let previous_output = prevouts.get(input_index)?;
-            txin.previous_output.consensus_encode(&mut writer)?;
-            previous_output.value.consensus_encode(&mut writer)?;
-            previous_output
-                .script_pubkey
-                .consensus_encode(&mut writer)?;
-            txin.sequence.consensus_encode(&mut writer)?;
-        } else {
-            (input_index as u32).consensus_encode(&mut writer)?;
-        }
-
-        // If an annex is present (the lowest bit of spend_type is set):
-        //      sha_annex (32): the SHA256 of (compact_size(size of annex) || annex), where annex
-        //      includes the mandatory 0x50 prefix.
-        if let Some(annex) = annex {
-            let mut enc = sha256::Hash::engine();
-            annex.consensus_encode(&mut enc)?;
-            let hash = sha256::Hash::from_engine(enc);
-            hash.consensus_encode(&mut writer)?;
-        }
-
-        // * Data about this output:
-        // If hash_type & 3 equals SIGHASH_SINGLE:
-        //      sha_single_output (32): the SHA256 of the corresponding output in CTxOut format.
-        if sighash == SchnorrSighashType::Single {
-            let mut enc = sha256::Hash::engine();
-            self.tx
-                .output
-                .get(input_index)
-                .ok_or_else(|| Error::SingleWithoutCorrespondingOutput {
-                    index: input_index,
-                    outputs_size: self.tx.output.len(),
-                })?
-                .consensus_encode(&mut enc)?;
-            let hash = sha256::Hash::from_engine(enc);
-            hash.consensus_encode(&mut writer)?;
-        }
-
-        //     if (scriptpath):
-        //         ss += TaggedHash("TapLeaf", bytes([leaf_ver]) + ser_string(script))
-        //         ss += bytes([0])
-        //         ss += struct.pack("<i", codeseparator_pos)
-        if let Some((hash, code_separator_pos)) = leaf_hash_code_separator {
-            hash.into_inner().consensus_encode(&mut writer)?;
-            KEY_VERSION_0.consensus_encode(&mut writer)?;
-            code_separator_pos.consensus_encode(&mut writer)?;
-        }
-
-        Ok(())
-    }
-
-    /// Compute the BIP341 sighash for any flag type.
-    pub fn taproot_signature_hash<T: Borrow<TxOut>>(
-        &mut self,
-        input_index: usize,
-        prevouts: &Prevouts<T>,
-        annex: Option<Annex>,
-        leaf_hash_code_separator: Option<(TapLeafHash, u32)>,
-        sighash_type: SchnorrSighashType,
-    ) -> Result<TapSighashHash, Error> {
-        let mut enc = TapSighashHash::engine();
-        self.taproot_encode_signing_data_to(
-            &mut enc,
-            input_index,
-            prevouts,
-            annex,
-            leaf_hash_code_separator,
-            sighash_type,
-        )?;
-        Ok(TapSighashHash::from_engine(enc))
-    }
-
-    /// Compute the BIP341 sighash for a key spend
-    pub fn taproot_key_spend_signature_hash<T: Borrow<TxOut>>(
-        &mut self,
-        input_index: usize,
-        prevouts: &Prevouts<T>,
-        sighash_type: SchnorrSighashType,
-    ) -> Result<TapSighashHash, Error> {
-        let mut enc = TapSighashHash::engine();
-        self.taproot_encode_signing_data_to(
-            &mut enc,
-            input_index,
-            prevouts,
-            None,
-            None,
-            sighash_type,
-        )?;
-        Ok(TapSighashHash::from_engine(enc))
-    }
-
-    /// Compute the BIP341 sighash for a script spend
-    ///
-    /// Assumes the default `OP_CODESEPARATOR` position of `0xFFFFFFFF`. Custom values can be
-    /// provided through the more fine-grained API of [`SighashCache::taproot_encode_signing_data_to`].
-    pub fn taproot_script_spend_signature_hash<S: Into<TapLeafHash>, T: Borrow<TxOut>>(
-        &mut self,
-        input_index: usize,
-        prevouts: &Prevouts<T>,
-        leaf_hash: S,
-        sighash_type: SchnorrSighashType,
-    ) -> Result<TapSighashHash, Error> {
-        let mut enc = TapSighashHash::engine();
-        self.taproot_encode_signing_data_to(
-            &mut enc,
-            input_index,
-            prevouts,
-            None,
-            Some((leaf_hash.into(), 0xFFFFFFFF)),
-            sighash_type,
-        )?;
-        Ok(TapSighashHash::from_engine(enc))
-    }
-
-    /// Encode the BIP143 signing data for any flag type into a given object implementing a
-    /// [`std::io::Write`] trait.
-    pub fn segwit_encode_signing_data_to<Write: io::Write>(
-        &mut self,
-        mut writer: Write,
-        input_index: usize,
-        script_code: &Script,
-        value: u64,
-        sighash_type: EcdsaSighashType,
-    ) -> Result<(), Error> {
-        let zero_hash = sha256d::Hash::default();
-
-        let (sighash, anyone_can_pay) = sighash_type.split_anyonecanpay_flag();
-
-        self.tx.version.consensus_encode(&mut writer)?;
-
-        if !anyone_can_pay {
-            self.segwit_cache().prevouts.consensus_encode(&mut writer)?;
-        } else {
-            zero_hash.consensus_encode(&mut writer)?;
-        }
-
-        if !anyone_can_pay
-            && sighash != EcdsaSighashType::Single
-            && sighash != EcdsaSighashType::None
-        {
-            self.segwit_cache()
-                .sequences
-                .consensus_encode(&mut writer)?;
-        } else {
-            zero_hash.consensus_encode(&mut writer)?;
-        }
-
-        {
-            let txin =
-                &self
-                    .tx
-                    .input
-                    .get(input_index)
-                    .ok_or_else(|| Error::IndexOutOfInputsBounds {
-                        index: input_index,
-                        inputs_size: self.tx.input.len(),
-                    })?;
-
-            txin.previous_output.consensus_encode(&mut writer)?;
-            script_code.consensus_encode(&mut writer)?;
-            value.consensus_encode(&mut writer)?;
-            txin.sequence.consensus_encode(&mut writer)?;
-        }
-
-        if sighash != EcdsaSighashType::Single && sighash != EcdsaSighashType::None {
-            self.segwit_cache().outputs.consensus_encode(&mut writer)?;
-        } else if sighash == EcdsaSighashType::Single && input_index < self.tx.output.len() {
-            let mut single_enc = Sighash::engine();
-            self.tx.output[input_index].consensus_encode(&mut single_enc)?;
-            Sighash::from_engine(single_enc).consensus_encode(&mut writer)?;
-        } else {
-            zero_hash.consensus_encode(&mut writer)?;
-        }
-
-        self.tx.lock_time.consensus_encode(&mut writer)?;
-        sighash_type.to_u32().consensus_encode(&mut writer)?;
-        Ok(())
-    }
-
-    /// Compute the BIP143 sighash for any flag type.
-    pub fn segwit_signature_hash(
-        &mut self,
-        input_index: usize,
-        script_code: &Script,
-        value: u64,
-        sighash_type: EcdsaSighashType,
-    ) -> Result<Sighash, Error> {
-        let mut enc = Sighash::engine();
-        self.segwit_encode_signing_data_to(
-            &mut enc,
-            input_index,
-            script_code,
-            value,
-            sighash_type,
-        )?;
-        Ok(Sighash::from_engine(enc))
-    }
-
-    /// Encode the legacy signing data for any flag type into a given object implementing a
-    /// [`std::io::Write`] trait. Internally calls [`Transaction::encode_signing_data_to`]
-    pub fn legacy_encode_signing_data_to<Write: io::Write, U: Into<u32>>(
-        &self,
-        mut writer: Write,
-        input_index: usize,
-        script_pubkey: &Script,
-        sighash_type: U,
-    ) -> Result<(), Error> {
-        if input_index >= self.tx.input.len() {
-            return Err(Error::IndexOutOfInputsBounds {
-                index: input_index,
-                inputs_size: self.tx.input.len(),
-            });
-        }
-        self.tx
-            .encode_signing_data_to(&mut writer, input_index, script_pubkey, sighash_type.into())
-            .expect("writers don't error");
-        Ok(())
-    }
-
-    /// Computes the legacy sighash for any sighash type.
-    pub fn legacy_signature_hash(
-        &self,
-        input_index: usize,
-        script_pubkey: &Script,
-        sighash_type: u32,
-    ) -> Result<Sighash, Error> {
-        let mut enc = Sighash::engine();
-        self.legacy_encode_signing_data_to(&mut enc, input_index, script_pubkey, sighash_type)?;
-        Ok(Sighash::from_engine(enc))
-    }
-
-    #[inline]
-    fn common_cache(&mut self) -> &CommonCache {
-        Self::common_cache_minimal_borrow(&mut self.common_cache, &self.tx)
-    }
-
-    fn common_cache_minimal_borrow<'a>(
-        common_cache: &'a mut Option<CommonCache>,
-        tx: &R,
-    ) -> &'a CommonCache {
-        common_cache.get_or_insert_with(|| {
-            let mut enc_prevouts = sha256::Hash::engine();
-            let mut enc_sequences = sha256::Hash::engine();
-            for txin in tx.input.iter() {
-                txin.previous_output
-                    .consensus_encode(&mut enc_prevouts)
-                    .unwrap();
-                txin.sequence.consensus_encode(&mut enc_sequences).unwrap();
-            }
-            CommonCache {
-                prevouts: sha256::Hash::from_engine(enc_prevouts),
-                sequences: sha256::Hash::from_engine(enc_sequences),
-                outputs: {
-                    let mut enc = sha256::Hash::engine();
-                    for txout in tx.output.iter() {
-                        txout.consensus_encode(&mut enc).unwrap();
-                    }
-                    sha256::Hash::from_engine(enc)
-                },
-            }
-        })
-    }
-
-    fn segwit_cache(&mut self) -> &SegwitCache {
-        let common_cache = &mut self.common_cache;
-        let tx = &self.tx;
-        self.segwit_cache.get_or_insert_with(|| {
-            let common_cache = Self::common_cache_minimal_borrow(common_cache, tx);
-            SegwitCache {
-                prevouts: sha256d::Hash::from_inner(
-                    sha256::Hash::hash(&common_cache.prevouts).into_inner(),
-                ),
-                sequences: sha256d::Hash::from_inner(
-                    sha256::Hash::hash(&common_cache.sequences).into_inner(),
-                ),
-                outputs: sha256d::Hash::from_inner(
-                    sha256::Hash::hash(&common_cache.outputs).into_inner(),
-                ),
-            }
-        })
-    }
-
-    fn taproot_cache<T: Borrow<TxOut>>(&mut self, prevouts: &[T]) -> &TaprootCache
-    {
-        self.taproot_cache.get_or_insert_with(|| {
-            let mut enc_amounts = sha256::Hash::engine();
-            let mut enc_script_pubkeys = sha256::Hash::engine();
-            for prevout in prevouts {
-                prevout.borrow().value.consensus_encode(&mut enc_amounts).unwrap();
-                prevout
-                    .borrow()
-                    .script_pubkey
-                    .consensus_encode(&mut enc_script_pubkeys)
-                    .unwrap();
-            }
-            TaprootCache {
-                amounts: sha256::Hash::from_engine(enc_amounts),
-                script_pubkeys: sha256::Hash::from_engine(enc_script_pubkeys),
-            }
-        })
-    }
-}
-
-impl<R: DerefMut<Target=Transaction>> SighashCache<R> {
-    /// When the SighashCache is initialized with a mutable reference to a transaction instead of a
-    /// regular reference, this method is available to allow modification to the witnesses.
-    ///
-    /// This allows in-line signing such as
-    /// ```
-    /// use dashcore::blockdata::transaction::{Transaction, hash_type::EcdsaSighashType};
-    /// use dashcore::util::sighash::SighashCache;
-    /// use dashcore::Script;
-    ///
-    /// let mut tx_to_sign = Transaction { version: 2, lock_time: 0, input: Vec::new(), output: Vec::new(), special_transaction_payload: None };
-    /// let input_count = tx_to_sign.input.len();
-    ///
-    /// let mut sig_hasher = SighashCache::new(&mut tx_to_sign);
-    /// for inp in 0..input_count {
-    ///     let prevout_script = Script::new();
-    ///     let _sighash = sig_hasher.segwit_signature_hash(inp, &prevout_script, 42, EcdsaSighashType::All);
-    ///     // ... sign the sighash
-    ///     sig_hasher.witness_mut(inp).unwrap().push(&Vec::new());
-    /// }
-    /// ```
-    pub fn witness_mut(&mut self, input_index: usize) -> Option<&mut Witness> {
-        self.tx.input.get_mut(input_index).map(|i| &mut i.witness)
-    }
-}
-
-impl From<io::Error> for Error {
-    fn from(e: io::Error) -> Self {
-        Error::Io(e.kind())
-    }
-}
-
-/// The `Annex` struct is a slice wrapper enforcing first byte to be `0x50`.
-#[derive(Clone, PartialEq, Eq, Hash, Debug)]
-pub struct Annex<'a>(&'a [u8]);
-
-impl<'a> Annex<'a> {
-    /// Creates a new `Annex` struct checking the first byte is `0x50`
-    pub fn new(annex_bytes: &'a [u8]) -> Result<Self, Error> {
-        if annex_bytes.first() == Some(&TAPROOT_ANNEX_PREFIX) {
-            Ok(Annex(annex_bytes))
-        } else {
-            Err(Error::WrongAnnex)
-        }
-    }
-
-    /// Returns the Annex bytes data (including first byte `0x50`)
-    pub fn as_bytes(&self) -> &[u8] {
-        &*self.0
-    }
-}
-
-impl<'a> Encodable for Annex<'a> {
-    fn consensus_encode<W: io::Write>(&self, writer: W) -> Result<usize, io::Error> {
-        encode::consensus_encode_with_size(self.0, writer)
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use consensus::deserialize;
-    use hashes::hex::FromHex;
-    use hashes::{Hash, HashEngine};
-    use util::sighash::{Annex, Error, Prevouts, ScriptPath, SighashCache};
-    use std::str::FromStr;
-    use hashes::hex::ToHex;
-    use util::taproot::{TapTweakHash, TapSighashHash, TapBranchHash, TapLeafHash};
-    use secp256k1::{self, SecretKey, XOnlyPublicKey};
-    extern crate serde_json;
-
-
-    use blockdata::transaction::txin::TxIn;
-
-    #[test]
-    fn test_tap_sighash_hash() {
-        let bytes = Vec::from_hex("00011b96877db45ffa23b307e9f0ac87b80ef9a80b4c5f0db3fbe734422453e83cc5576f3d542c5d4898fb2b696c15d43332534a7c1d1255fda38993545882df92c3e353ff6d36fbfadc4d168452afd8467f02fe53d71714fcea5dfe2ea759bd00185c4cb02bc76d42620393ca358a1a713f4997f9fc222911890afb3fe56c6a19b202df7bffdcfad08003821294279043746631b00e2dc5e52a111e213bbfe6ef09a19428d418dab0d50000000000").unwrap();
-        let expected =
-            Vec::from_hex("04e808aad07a40b3767a1442fead79af6ef7e7c9316d82dec409bb31e77699b0")
-                .unwrap();
-        let mut enc = TapSighashHash::engine();
-        enc.input(&bytes);
-        let hash = TapSighashHash::from_engine(enc);
-        assert_eq!(expected, hash.into_inner());
-    }
-
-    #[ignore]
-    #[test]
-    fn test_sighashes_keyspending() {
-        // following test case has been taken from bitcoin core test framework
-
-        test_taproot_sighash(
-            "020000000164eb050a5e3da0c2a65e4786f26d753b7bc69691fabccafb11f7acef36641f1846010000003101b2b404392a22000000000017a9147f2bde86fe78bf68a0544a4f290e12f0b7e0a08c87580200000000000017a91425d11723074ecfb96a0a83c3956bfaf362ae0c908758020000000000001600147e20f938993641de67bb0cdd71682aa34c4d29ad5802000000000000160014c64984dc8761acfa99418bd6bedc79b9287d652d72000000",
-            "01365724000000000023542156b39dab4f8f3508e0432cfb41fab110170acaa2d4c42539cb90a4dc7c093bc500",
-            0,
-            "33ca0ebfb4a945eeee9569fc0f5040221275f88690b7f8592ada88ce3bdf6703",
-            SchnorrSighashType::Default, None, None, None
-        );
-
-        test_taproot_sighash(
-            "0200000002fff49be59befe7566050737910f6ccdc5e749c7f8860ddc140386463d88c5ad0f3000000002cf68eb4a3d67f9d4c079249f7e4f27b8854815cb1ed13842d4fbf395f9e217fd605ee24090100000065235d9203f458520000000000160014b6d48333bb13b4c644e57c43a9a26df3a44b785e58020000000000001976a914eea9461a9e1e3f765d3af3e726162e0229fe3eb688ac58020000000000001976a9143a8869c9f2b5ea1d4ff3aeeb6a8fb2fffb1ad5fe88ac0ad7125c",
-            "02591f220000000000225120f25ad35583ea31998d968871d7de1abd2a52f6fe4178b54ea158274806ff4ece48fb310000000000225120f25ad35583ea31998d968871d7de1abd2a52f6fe4178b54ea158274806ff4ece",
-            1,
-            "626ab955d58c9a8a600a0c580549d06dc7da4e802eb2a531f62a588e430967a8",
-            SchnorrSighashType::All, None, None, None
-        );
-
-        test_taproot_sighash(
-            "0200000001350005f65aa830ced2079df348e2d8c2bdb4f10e2dde6a161d8a07b40d1ad87dae000000001611d0d603d9dc0e000000000017a914459b6d7d6bbb4d8837b4bf7e9a4556f952da2f5c8758020000000000001976a9141dd70e1299ffc2d5b51f6f87de9dfe9398c33cbb88ac58020000000000001976a9141dd70e1299ffc2d5b51f6f87de9dfe9398c33cbb88aca71c1f4f",
-            "01c4811000000000002251201bf9297d0a2968ae6693aadd0fa514717afefd218087a239afb7418e2d22e65c",
-            0,
-            "dfa9437f9c9a1d1f9af271f79f2f5482f287cdb0d2e03fa92c8a9b216cc6061c",
-            SchnorrSighashType::AllPlusAnyoneCanPay, None, None, None
-        );
-
-        test_taproot_sighash(
-            "020000000185bed1a6da2bffbd60ec681a1bfb71c5111d6395b99b3f8b2bf90167111bcb18f5010000007c83ace802ded24a00000000001600142c4698f9f7a773866879755aa78c516fb332af8e5802000000000000160014d38639dfbac4259323b98a472405db0c461b31fa61073747",
-            "0144c84d0000000000225120e3f2107989c88e67296ab2faca930efa2e3a5bd3ff0904835a11c9e807458621",
-            0,
-            "3129de36a5d05fff97ffca31eb75fcccbbbc27b3147a7a36a9e4b45d8b625067",
-            SchnorrSighashType::None, None, None, None
-        );
-
-        test_taproot_sighash(
-            "eb93dbb901028c8515589dac980b6e7f8e4088b77ed866ca0d6d210a7218b6fd0f6b22dd6d7300000000eb4740a9047efc0e0000000000160014913da2128d8fcf292b3691db0e187414aa1783825802000000000000160014913da2128d8fcf292b3691db0e187414aa178382580200000000000017a9143dd27f01c6f7ef9bb9159937b17f17065ed01a0c875802000000000000160014d7630e19df70ada9905ede1722b800c0005f246641000000",
-            "013fed110000000000225120eb536ae8c33580290630fc495046e998086a64f8f33b93b07967d9029b265c55",
-            0,
-            "2441e8b0e063a2083ee790f14f2045022f07258ddde5ee01de543c9e789d80ae",
-            SchnorrSighashType::NonePlusAnyoneCanPay, None, None, None
-        );
-
-        test_taproot_sighash(
-            "02000000017836b409a5fed32211407e44b971591f2032053f14701fb5b3a30c0ff382f2cc9c0100000061ac55f60288fb5600000000001976a9144ea02f6f182b082fb6ce47e36bbde390b6a41b5088ac58020000000000001976a9144ea02f6f182b082fb6ce47e36bbde390b6a41b5088ace4000000",
-            "01efa558000000000022512007071ea3dc7e331b0687d0193d1e6d6ed10e645ef36f10ef8831d5e522ac9e80",
-            0,
-            "30239345177cadd0e3ea413d49803580abb6cb27971b481b7788a78d35117a88",
-            SchnorrSighashType::Single, None, None, None
-        );
-
-        test_taproot_sighash(
-            "0100000001aa6deae89d5e0aaca58714fc76ef6f3c8284224888089232d4e663843ed3ab3eae010000008b6657a60450cb4c0000000000160014a3d42b5413ef0c0701c4702f3cd7d4df222c147058020000000000001976a91430b4ed8723a4ee8992aa2c8814cfe5c3ad0ab9d988ac5802000000000000160014365b1166a6ed0a5e8e9dff17a6d00bbb43454bc758020000000000001976a914bc98c51a84fe7fad5dc380eb8b39586eff47241688ac4f313247",
-            "0107af4e00000000002251202c36d243dfc06cb56a248e62df27ecba7417307511a81ae61aa41c597a929c69",
-            0,
-            "bf9c83f26c6dd16449e4921f813f551c4218e86f2ec906ca8611175b41b566df",
-            SchnorrSighashType::SinglePlusAnyoneCanPay, None, None, None
-        );
-    }
-
-    #[ignore]
-    #[test]
-    fn test_sighashes_with_annex() {
-        test_taproot_sighash(
-            "0200000001df8123752e8f37d132c4e9f1ff7e4f9b986ade9211267e9ebd5fd22a5e718dec6d01000000ce4023b903cb7b23000000000017a914a18b36ea7a094db2f4940fc09edf154e86de7bd787580200000000000017a914afd0d512a2c5c2b40e25669e9cc460303c325b8b87580200000000000017a914a18b36ea7a094db2f4940fc09edf154e86de7bd787f6020000",
-            "01ea49260000000000225120ab5e9800806bf18cb246edcf5fe63441208fe955a4b5a35bbff65f5db622a010",
-            0,
-            "3b003000add359a364a156e73e02846782a59d0d95ca8c4638aaad99f2ef915c",
-            SchnorrSighashType::SinglePlusAnyoneCanPay,
-            Some("507b979802e62d397acb29f56743a791894b99372872fc5af06a4f6e8d242d0615cda53062bb20e6ec79756fe39183f0c128adfe85559a8fa042b042c018aa8010143799e44f0893c40e1e"),
-            None,
-            None,
-        );
-    }
-
-    #[ignore]
-    #[test]
-    fn test_sighashes_with_script_path() {
-        test_taproot_sighash(
-            "020000000189fc651483f9296b906455dd939813bf086b1bbe7c77635e157c8e14ae29062195010000004445b5c7044561320000000000160014331414dbdada7fb578f700f38fb69995fc9b5ab958020000000000001976a914268db0a8104cc6d8afd91233cc8b3d1ace8ac3ef88ac580200000000000017a914ec00dcb368d6a693e11986d265f659d2f59e8be2875802000000000000160014c715799a49a0bae3956df9c17cb4440a673ac0df6f010000",
-            "011bec34000000000022512028055142ea437db73382e991861446040b61dd2185c4891d7daf6893d79f7182",
-            0,
-            "d66de5274a60400c7b08c86ba6b7f198f40660079edf53aca89d2a9501317f2e",
-            SchnorrSighashType::All,
-            None,
-            Some("20cc4e1107aea1d170c5ff5b6817e1303010049724fb3caa7941792ea9d29b3e2bacab"),
-            None,
-        );
-    }
-
-    #[ignore]
-    #[test]
-    fn test_sighashes_with_script_path_raw_hash() {
-        test_taproot_sighash(
-            "020000000189fc651483f9296b906455dd939813bf086b1bbe7c77635e157c8e14ae29062195010000004445b5c7044561320000000000160014331414dbdada7fb578f700f38fb69995fc9b5ab958020000000000001976a914268db0a8104cc6d8afd91233cc8b3d1ace8ac3ef88ac580200000000000017a914ec00dcb368d6a693e11986d265f659d2f59e8be2875802000000000000160014c715799a49a0bae3956df9c17cb4440a673ac0df6f010000",
-            "011bec34000000000022512028055142ea437db73382e991861446040b61dd2185c4891d7daf6893d79f7182",
-            0,
-            "d66de5274a60400c7b08c86ba6b7f198f40660079edf53aca89d2a9501317f2e",
-            SchnorrSighashType::All,
-            None,
-            None,
-            Some("15a2530514e399f8b5cf0b3d3112cf5b289eaa3e308ba2071b58392fdc6da68a"),
-        );
-    }
-
-    #[test]
-    fn test_sighashes_with_annex_and_script() {
-        test_taproot_sighash(
-            "020000000132fb72cb8fba496755f027a9743e2d698c831fdb8304e4d1a346ac92cbf51acba50100000026bdc7df044aad34000000000017a9144fa2554ed6174586854fa3bc01de58dcf33567d0875802000000000000160014950367e1e62cdf240b35b883fc2f5e39f0eb9ab95802000000000000160014950367e1e62cdf240b35b883fc2f5e39f0eb9ab958020000000000001600141b31217d48ccc8760dcc0710fade5866d628e733a02d5122",
-            "011458360000000000225120a7baec3fb9f84614e3899fcc010c638f80f13539344120e1f4d8b68a9a011a13",
-            0,
-            "a0042aa434f9a75904b64043f2a283f8b4c143c7f4f7f49a6cbe5b9f745f4c15",
-            SchnorrSighashType::All,
-            Some("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"),
-            Some("7520ab9160dd8299dc1367659be3e8f66781fe440d52940c7f8d314a89b9f2698d406ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6ead6eadac"),
-            None,
-        );
-    }
-
-    #[test]
-    fn test_sighash_errors() {
-        let dumb_tx = Transaction {
-            version: 0,
-            lock_time: 0,
-            input: vec![TxIn::default()],
-            output: vec![],
-            special_transaction_payload: None
-        };
-        let mut c = SighashCache::new(&dumb_tx);
-
-        // 1.29 fixes
-        let empty_vec = vec![];
-        let empty_prevouts : Prevouts<TxOut> = Prevouts::All(&empty_vec);
-        assert_eq!(
-            c.taproot_signature_hash(0, &empty_prevouts, None, None, SchnorrSighashType::All),
-            Err(Error::PrevoutsSize)
-        );
-        let two = vec![TxOut::default(), TxOut::default()];
-        let too_many_prevouts = Prevouts::All(&two);
-        assert_eq!(
-            c.taproot_signature_hash(0, &too_many_prevouts, None, None, SchnorrSighashType::All),
-            Err(Error::PrevoutsSize)
-        );
-        let tx_out = TxOut::default();
-        let prevout = Prevouts::One(1, &tx_out);
-        assert_eq!(
-            c.taproot_signature_hash(0, &prevout, None, None, SchnorrSighashType::All),
-            Err(Error::PrevoutKind)
-        );
-        assert_eq!(
-            c.taproot_signature_hash(0, &prevout, None, None, SchnorrSighashType::AllPlusAnyoneCanPay),
-            Err(Error::PrevoutIndex)
-        );
-        assert_eq!(
-            c.taproot_signature_hash(10, &prevout, None, None, SchnorrSighashType::AllPlusAnyoneCanPay),
-            Err(Error::IndexOutOfInputsBounds {
-                index: 10,
-                inputs_size: 1
-            })
-        );
-        let prevout = Prevouts::One(0, &tx_out);
-        assert_eq!(
-            c.taproot_signature_hash(0, &prevout, None, None, SchnorrSighashType::SinglePlusAnyoneCanPay),
-            Err(Error::SingleWithoutCorrespondingOutput {
-                index: 0,
-                outputs_size: 0
-            })
-        );
-        assert_eq!(
-            c.legacy_signature_hash(10, &Script::default(), 0u32),
-            Err(Error::IndexOutOfInputsBounds {
-                index: 10,
-                inputs_size: 1
-            })
-        );
-    }
-
-    #[test]
-    fn test_annex_errors() {
-        assert_eq!(Annex::new(&vec![]), Err(Error::WrongAnnex));
-        assert_eq!(Annex::new(&vec![0x51]), Err(Error::WrongAnnex));
-        assert_eq!(Annex::new(&vec![0x51, 0x50]), Err(Error::WrongAnnex));
-    }
-
-    fn test_taproot_sighash(
-        tx_hex: &str,
-        prevout_hex: &str,
-        input_index: usize,
-        expected_hash: &str,
-        sighash_type: SchnorrSighashType,
-        annex_hex: Option<&str>,
-        script_hex: Option<&str>,
-        script_leaf_hash: Option<&str>,
-    ) {
-        let tx_bytes = Vec::from_hex(tx_hex).unwrap();
-        let tx: Transaction = deserialize(&tx_bytes).unwrap();
-        let prevout_bytes = Vec::from_hex(prevout_hex).unwrap();
-        let prevouts: Vec<TxOut> = deserialize(&prevout_bytes).unwrap();
-        let annex_inner;
-        let annex = match annex_hex {
-            Some(annex_hex) => {
-                annex_inner = Vec::from_hex(annex_hex).unwrap();
-                Some(Annex::new(&annex_inner).unwrap())
-            }
-            None => None,
-        };
-
-        let leaf_hash =  match (script_hex, script_leaf_hash) {
-            (Some(script_hex), _) => {
-                let script_inner = Script::from_hex(script_hex).unwrap();
-                Some(ScriptPath::with_defaults(&script_inner).leaf_hash())
-            }
-            (_, Some(script_leaf_hash)) => {
-                Some(TapLeafHash::from_hex(script_leaf_hash).unwrap())
-            }
-            _ => None,
-        };
-        // All our tests use the default `0xFFFFFFFF` codeseparator value
-        let leaf_hash = leaf_hash.map(|lh| (lh, 0xFFFFFFFF));
-
-        let prevouts = if sighash_type.split_anyonecanpay_flag().1 && tx_bytes[0] % 2 == 0 {
-            // for anyonecanpay the `Prevouts::All` variant is good anyway, but sometimes we want to
-            // test other codepaths
-            Prevouts::One(input_index, prevouts[input_index].clone())
-        } else {
-            Prevouts::All(&prevouts)
-        };
-
-        let mut sighash_cache = SighashCache::new(&tx);
-
-        let hash = sighash_cache
-            .taproot_signature_hash(input_index, &prevouts, annex, leaf_hash, sighash_type)
-            .unwrap();
-        let expected = Vec::from_hex(expected_hash).unwrap();
-        assert_eq!(expected, hash.into_inner());
-    }
-
-    #[test]
-    fn bip_341_sighash_tests() {
-
-        let data = bip_341_read_json();
-        assert!(data["version"].as_u64().unwrap() == 1u64);
-        let secp = &secp256k1::Secp256k1::new();
-        let key_path = &data["keyPathSpending"].as_array().unwrap()[0];
-
-        let raw_unsigned_tx = hex_decode!(Transaction, key_path["given"]["rawUnsignedTx"].as_str().unwrap());
-        let mut utxos = vec![];
-        for utxo in key_path["given"]["utxosSpent"].as_array().unwrap() {
-            let spk = hex_script!(utxo["scriptPubKey"].as_str().unwrap());
-            let amt = utxo["amountSats"].as_u64().unwrap();
-            utxos.push(TxOut {value: amt, script_pubkey: spk });
-        }
-
-        // Test intermediary
-        let mut cache = SighashCache::new(&raw_unsigned_tx);
-        let expected_amt_hash = key_path["intermediary"]["hashAmounts"].as_str().unwrap();
-        let expected_outputs_hash = key_path["intermediary"]["hashOutputs"].as_str().unwrap();
-        let expected_prevouts_hash = key_path["intermediary"]["hashPrevouts"].as_str().unwrap();
-        let expected_spks_hash = key_path["intermediary"]["hashScriptPubkeys"].as_str().unwrap();
-        let expected_sequences_hash = key_path["intermediary"]["hashSequences"].as_str().unwrap();
-
-        // Compute all caches
-        assert_eq!(expected_amt_hash, cache.taproot_cache(&utxos).amounts.to_hex());
-        assert_eq!(expected_outputs_hash, cache.common_cache().outputs.to_hex());
-        assert_eq!(expected_prevouts_hash, cache.common_cache().prevouts.to_hex());
-        assert_eq!(expected_spks_hash, cache.taproot_cache(&utxos).script_pubkeys.to_hex());
-        assert_eq!(expected_sequences_hash, cache.common_cache().sequences.to_hex());
-
-        for inp in key_path["inputSpending"].as_array().unwrap() {
-            let tx_ind = inp["given"]["txinIndex"].as_u64().unwrap() as usize;
-            let internal_priv_key = hex_hash!(SecretKey, inp["given"]["internalPrivkey"].as_str().unwrap());
-            let merkle_root = if inp["given"]["merkleRoot"].is_null() {
-                None
-            } else {
-                Some(hex_hash!(TapBranchHash, inp["given"]["merkleRoot"].as_str().unwrap()))
-            };
-            let hash_ty = SchnorrSighashType::from_u8(inp["given"]["hashType"].as_u64().unwrap() as u8).unwrap();
-
-            let expected_internal_pk = hex_hash!(XOnlyPublicKey, inp["intermediary"]["internalPubkey"].as_str().unwrap());
-            let expected_tweak = hex_hash!(TapTweakHash, inp["intermediary"]["tweak"].as_str().unwrap());
-            let expected_tweaked_priv_key = hex_hash!(SecretKey, inp["intermediary"]["tweakedPrivkey"].as_str().unwrap());
-            let expected_sig_msg = Vec::<u8>::from_hex(inp["intermediary"]["sigMsg"].as_str().unwrap()).unwrap();
-            let expected_sighash = hex_hash!(TapSighashHash, inp["intermediary"]["sigHash"].as_str().unwrap());
-            let sig_str = inp["expected"]["witness"][0].as_str().unwrap();
-            let (expected_key_spend_sig, expected_hash_ty) = if sig_str.len() == 128 {
-                (secp256k1::schnorr::Signature::from_str(sig_str).unwrap(), SchnorrSighashType::Default)
-            } else {
-                let hash_ty = SchnorrSighashType::from_u8(Vec::<u8>::from_hex(&sig_str[128..]).unwrap()[0]).unwrap();
-                (secp256k1::schnorr::Signature::from_str(&sig_str[..128]).unwrap(), hash_ty)
-            };
-
-            // tests
-            let keypair = secp256k1::KeyPair::from_secret_key(secp, &internal_priv_key);
-            let (internal_key, _parity) = XOnlyPublicKey::from_keypair(&keypair);
-            let tweak = TapTweakHash::from_key_and_tweak(internal_key, merkle_root);
-            let tweaked_keypair = keypair.add_xonly_tweak(secp, &tweak.to_scalar()).unwrap();
-            let mut sig_msg = Vec::new();
-            cache.taproot_encode_signing_data_to(
-                &mut sig_msg,
-                tx_ind,
-                &Prevouts::All(&utxos),
-                None,
-                None,
-                hash_ty
-            ).unwrap();
-            let sighash = cache.taproot_signature_hash(
-                tx_ind,
-                &Prevouts::All(&utxos),
-                None,
-                None,
-                hash_ty
-            ).unwrap();
-
-            let msg = secp256k1::Message::from_slice(&sighash).unwrap();
-            let key_spend_sig = secp.sign_schnorr_with_aux_rand(&msg, &tweaked_keypair, &[0u8; 32]);
-
-            assert_eq!(expected_internal_pk, internal_key);
-            assert_eq!(expected_tweak, tweak);
-            assert_eq!(expected_sig_msg, sig_msg);
-            assert_eq!(expected_sighash, sighash);
-            assert_eq!(expected_hash_ty, hash_ty);
-            assert_eq!(expected_key_spend_sig, key_spend_sig);
-
-            let tweaked_priv_key = SecretKey::from_keypair(&tweaked_keypair);
-            assert_eq!(expected_tweaked_priv_key, tweaked_priv_key);
-        }
-    }
-
-    fn bip_341_read_json() -> serde_json::Value {
-        let json_str = include_str!("../../test_data/bip341_tests.json");
-        serde_json::from_str(json_str).expect("JSON was not well-formatted")
-    }
-
-    #[test]
-    fn sighashtype_fromstr_display() {
-        let sighashtypes = vec![
-            ("SIGHASH_DEFAULT", SchnorrSighashType::Default),
-            ("SIGHASH_ALL", SchnorrSighashType::All),
-            ("SIGHASH_NONE", SchnorrSighashType::None),
-            ("SIGHASH_SINGLE", SchnorrSighashType::Single),
-            ("SIGHASH_ALL|SIGHASH_ANYONECANPAY", SchnorrSighashType::AllPlusAnyoneCanPay),
-            ("SIGHASH_NONE|SIGHASH_ANYONECANPAY", SchnorrSighashType::NonePlusAnyoneCanPay),
-            ("SIGHASH_SINGLE|SIGHASH_ANYONECANPAY", SchnorrSighashType::SinglePlusAnyoneCanPay),
-            ("SIGHASH_RESERVED", SchnorrSighashType::Reserved),
-        ];
-        for (s, sht) in sighashtypes {
-            assert_eq!(sht.to_string(), s);
-            assert_eq!(SchnorrSighashType::from_str(s).unwrap(), sht);
-        }
-        let sht_mistakes = vec![
-            "SIGHASH_ALL | SIGHASH_ANYONECANPAY",
-            "SIGHASH_NONE |SIGHASH_ANYONECANPAY",
-            "SIGHASH_SINGLE| SIGHASH_ANYONECANPAY",
-            "SIGHASH_ALL SIGHASH_ANYONECANPAY",
-            "SIGHASH_NONE |",
-            "SIGHASH_SIGNLE",
-            "DEFAULT",
-            "ALL",
-            "sighash_none",
-            "Sighash_none",
-            "SigHash_None",
-            "SigHash_NONE",
-        ];
-        for s in sht_mistakes {
-            assert_eq!(SchnorrSighashType::from_str(s).unwrap_err().to_string(), format!("Unrecognized SIGHASH string '{}'", s));
-        }
-    }
-}
diff --git a/src/util/uint.rs b/src/util/uint.rs
deleted file mode 100644
index e35fc931c..000000000
--- a/src/util/uint.rs
+++ /dev/null
@@ -1,819 +0,0 @@
-// Rust Dash Library
-// Originally written in 2014 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//     For Bitcoin
-// Updated for Dash in 2022 by
-//     The Dash Core Developers
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
-
-//! Big unsigned integer types.
-//!
-//! Implementation of various large-but-fixed sized unsigned integer types.
-//! The functions here are designed to be fast.
-//!
-
-macro_rules! construct_uint {
-    ($name:ident, $n_words:expr) => {
-        /// Little-endian large integer type
-        #[derive(Copy, Clone, PartialEq, Eq, Hash, Default)]
-        pub struct $name(pub [u64; $n_words]);
-        impl_array_newtype!($name, u64, $n_words);
-
-        impl $name {
-            /// Conversion to u32
-            #[inline]
-            pub fn low_u32(&self) -> u32 {
-                let &$name(ref arr) = self;
-                arr[0] as u32
-            }
-
-            /// Conversion to u64
-            #[inline]
-            pub fn low_u64(&self) -> u64 {
-                let &$name(ref arr) = self;
-                arr[0] as u64
-            }
-
-
-            /// Return the least number of bits needed to represent the number
-            #[inline]
-            pub fn bits(&self) -> usize {
-                let &$name(ref arr) = self;
-                for i in 1..$n_words {
-                    if arr[$n_words - i] > 0 { return (0x40 * ($n_words - i + 1)) - arr[$n_words - i].leading_zeros() as usize; }
-                }
-                0x40 - arr[0].leading_zeros() as usize
-            }
-
-            /// Multiplication by u32
-            pub fn mul_u32(self, other: u32) -> $name {
-                let $name(ref arr) = self;
-                let mut carry = [0u64; $n_words];
-                let mut ret = [0u64; $n_words];
-                for i in 0..$n_words {
-                    let not_last_word = i < $n_words - 1;
-                    let upper = other as u64 * (arr[i] >> 32);
-                    let lower = other as u64 * (arr[i] & 0xFFFFFFFF);
-                    if not_last_word {
-                        carry[i + 1] += upper >> 32;
-                    }
-                    let (sum, overflow) = lower.overflowing_add(upper << 32);
-                    ret[i] = sum;
-                    if overflow && not_last_word {
-                        carry[i + 1] += 1;
-                    }
-                }
-                $name(ret) + $name(carry)
-            }
-
-            /// Create an object from a given unsigned 64-bit integer
-            #[inline]
-            pub fn from_u64(init: u64) -> Option<$name> {
-                let mut ret = [0; $n_words];
-                ret[0] = init;
-                Some($name(ret))
-            }
-
-            /// Create an object from a given signed 64-bit integer
-            #[inline]
-            pub fn from_i64(init: i64) -> Option<$name> {
-                if init >= 0 {
-                    $name::from_u64(init as u64)
-                } else {
-                    None
-                }
-            }
-
-            /// Creates big integer value from a byte array using
-            /// big-endian encoding
-            pub fn from_be_bytes(bytes: [u8; $n_words * 8]) -> $name {
-                Self::_from_be_slice(&bytes)
-            }
-
-            /// Creates big integer value from a byte slice using
-            /// big-endian encoding
-            pub fn from_be_slice(bytes: &[u8]) -> Result<$name, ParseLengthError> {
-                if bytes.len() != $n_words * 8 {
-                    Err(ParseLengthError { actual: bytes.len(), expected: $n_words*8 })
-                } else {
-                    Ok(Self::_from_be_slice(bytes))
-                }
-            }
-
-            fn _from_be_slice(bytes: &[u8]) -> $name {
-                use super::endian::slice_to_u64_be;
-                let mut slice = [0u64; $n_words];
-                slice.iter_mut()
-                    .rev()
-                    .zip(bytes.chunks(8))
-                    .for_each(|(word, bytes)| *word = slice_to_u64_be(bytes));
-                $name(slice)
-            }
-
-            /// Convert a big integer into a byte array using big-endian encoding
-            pub fn to_be_bytes(&self) -> [u8; $n_words * 8] {
-                use super::endian::u64_to_array_be;
-                let mut res = [0; $n_words * 8];
-                for i in 0..$n_words {
-                    let start = i * 8;
-                    res[start..start+8].copy_from_slice(&u64_to_array_be(self.0[$n_words - (i+1)]));
-                }
-                res
-            }
-
-            // divmod like operation, returns (quotient, remainder)
-            #[inline]
-            fn div_rem(self, other: Self) -> (Self, Self) {
-                let mut sub_copy = self;
-                let mut shift_copy = other;
-                let mut ret = [0u64; $n_words];
-
-                let my_bits = self.bits();
-                let your_bits = other.bits();
-
-                // Check for division by 0
-                assert!(your_bits != 0, "attempted to divide {} by zero", self);
-
-                // Early return in case we are dividing by a larger number than us
-                if my_bits < your_bits {
-                    return ($name(ret), sub_copy);
-                }
-
-                // Bitwise long division
-                let mut shift = my_bits - your_bits;
-                shift_copy = shift_copy << shift;
-                loop {
-                    if sub_copy >= shift_copy {
-                        ret[shift / 64] |= 1 << (shift % 64);
-                        sub_copy = sub_copy - shift_copy;
-                    }
-                    shift_copy = shift_copy >> 1;
-                    if shift == 0 {
-                        break;
-                    }
-                    shift -= 1;
-                }
-
-                ($name(ret), sub_copy)
-            }
-
-            /// Increment by 1
-            #[inline]
-            pub fn increment(&mut self) {
-                let &mut $name(ref mut arr) = self;
-                for i in 0..$n_words {
-                    arr[i] = arr[i].wrapping_add(1);
-                    if arr[i] != 0 {
-                        break;
-                    }
-                }
-            }
-        }
-
-        impl PartialOrd for $name {
-            #[inline]
-            fn partial_cmp(&self, other: &$name) -> Option<::core::cmp::Ordering> {
-                Some(self.cmp(&other))
-            }
-        }
-
-        impl Ord for $name {
-            #[inline]
-            fn cmp(&self, other: &$name) -> ::core::cmp::Ordering {
-                // We need to manually implement ordering because we use little-endian
-                // and the auto derive is a lexicographic ordering(i.e. memcmp)
-                // which with numbers is equivalent to big-endian
-                for i in 0..$n_words {
-                    if self[$n_words - 1 - i] < other[$n_words - 1 - i] {
-                        return ::core::cmp::Ordering::Less;
-                    }
-                    if self[$n_words - 1 - i] > other[$n_words - 1 - i] {
-                        return ::core::cmp::Ordering::Greater;
-                    }
-                }
-                ::core::cmp::Ordering::Equal
-            }
-        }
-
-        impl ::core::ops::Add<$name> for $name {
-            type Output = $name;
-
-            fn add(self, other: $name) -> $name {
-                let $name(ref me) = self;
-                let $name(ref you) = other;
-                let mut ret = [0u64; $n_words];
-                let mut carry = [0u64; $n_words];
-                let mut b_carry = false;
-                for i in 0..$n_words {
-                    ret[i] = me[i].wrapping_add(you[i]);
-                    if i < $n_words - 1 && ret[i] < me[i] {
-                        carry[i + 1] = 1;
-                        b_carry = true;
-                    }
-                }
-                if b_carry { $name(ret) + $name(carry) } else { $name(ret) }
-            }
-        }
-
-        impl ::core::ops::Sub<$name> for $name {
-            type Output = $name;
-
-            #[inline]
-            fn sub(self, other: $name) -> $name {
-                self + !other + $crate::util::BitArray::one()
-            }
-        }
-
-        impl ::core::ops::Mul<$name> for $name {
-            type Output = $name;
-
-            fn mul(self, other: $name) -> $name {
-                use $crate::util::BitArray;
-                let mut me = $name::zero();
-                // TODO: be more efficient about this
-                for i in 0..(2 * $n_words) {
-                    let to_mul = (other >> (32 * i)).low_u32();
-                    me = me + (self.mul_u32(to_mul) << (32 * i));
-                }
-                me
-            }
-        }
-
-        impl ::core::ops::Div<$name> for $name {
-            type Output = $name;
-
-            fn div(self, other: $name) -> $name {
-                self.div_rem(other).0
-            }
-        }
-
-        impl ::core::ops::Rem<$name> for $name {
-            type Output = $name;
-
-            fn rem(self, other: $name) -> $name {
-                self.div_rem(other).1
-            }
-        }
-
-        impl $crate::util::BitArray for $name {
-            #[inline]
-            fn bit(&self, index: usize) -> bool {
-                let &$name(ref arr) = self;
-                arr[index / 64] & (1 << (index % 64)) != 0
-            }
-
-            #[inline]
-            fn bit_slice(&self, start: usize, end: usize) -> $name {
-                (*self >> start).mask(end - start)
-            }
-
-            #[inline]
-            fn mask(&self, n: usize) -> $name {
-                let &$name(ref arr) = self;
-                let mut ret = [0; $n_words];
-                for i in 0..$n_words {
-                    if n >= 0x40 * (i + 1) {
-                        ret[i] = arr[i];
-                    } else {
-                        ret[i] = arr[i] & ((1 << (n - 0x40 * i)) - 1);
-                        break;
-                    }
-                }
-                $name(ret)
-            }
-
-            #[inline]
-            fn trailing_zeros(&self) -> usize {
-                let &$name(ref arr) = self;
-                for i in 0..($n_words - 1) {
-                    if arr[i] > 0 { return (0x40 * i) + arr[i].trailing_zeros() as usize; }
-                }
-                (0x40 * ($n_words - 1)) + arr[$n_words - 1].trailing_zeros() as usize
-            }
-
-            fn zero() -> $name { Default::default() }
-            fn one() -> $name {
-                $name({ let mut ret = [0; $n_words]; ret[0] = 1; ret })
-            }
-        }
-
-        impl ::core::ops::BitAnd<$name> for $name {
-            type Output = $name;
-
-            #[inline]
-            fn bitand(self, other: $name) -> $name {
-                let $name(ref arr1) = self;
-                let $name(ref arr2) = other;
-                let mut ret = [0u64; $n_words];
-                for i in 0..$n_words {
-                    ret[i] = arr1[i] & arr2[i];
-                }
-                $name(ret)
-            }
-        }
-
-        impl ::core::ops::BitXor<$name> for $name {
-            type Output = $name;
-
-            #[inline]
-            fn bitxor(self, other: $name) -> $name {
-                let $name(ref arr1) = self;
-                let $name(ref arr2) = other;
-                let mut ret = [0u64; $n_words];
-                for i in 0..$n_words {
-                    ret[i] = arr1[i] ^ arr2[i];
-                }
-                $name(ret)
-            }
-        }
-
-        impl ::core::ops::BitOr<$name> for $name {
-            type Output = $name;
-
-            #[inline]
-            fn bitor(self, other: $name) -> $name {
-                let $name(ref arr1) = self;
-                let $name(ref arr2) = other;
-                let mut ret = [0u64; $n_words];
-                for i in 0..$n_words {
-                    ret[i] = arr1[i] | arr2[i];
-                }
-                $name(ret)
-            }
-        }
-
-        impl ::core::ops::Not for $name {
-            type Output = $name;
-
-            #[inline]
-            fn not(self) -> $name {
-                let $name(ref arr) = self;
-                let mut ret = [0u64; $n_words];
-                for i in 0..$n_words {
-                    ret[i] = !arr[i];
-                }
-                $name(ret)
-            }
-        }
-
-        impl ::core::ops::Shl<usize> for $name {
-            type Output = $name;
-
-            fn shl(self, shift: usize) -> $name {
-                let $name(ref original) = self;
-                let mut ret = [0u64; $n_words];
-                let word_shift = shift / 64;
-                let bit_shift = shift % 64;
-                for i in 0..$n_words {
-                    // Shift
-                    if bit_shift < 64 && i + word_shift < $n_words {
-                        ret[i + word_shift] += original[i] << bit_shift;
-                    }
-                    // Carry
-                    if bit_shift > 0 && i + word_shift + 1 < $n_words {
-                        ret[i + word_shift + 1] += original[i] >> (64 - bit_shift);
-                    }
-                }
-                $name(ret)
-            }
-        }
-
-        impl ::core::ops::Shr<usize> for $name {
-            type Output = $name;
-
-            fn shr(self, shift: usize) -> $name {
-                let $name(ref original) = self;
-                let mut ret = [0u64; $n_words];
-                let word_shift = shift / 64;
-                let bit_shift = shift % 64;
-                for i in word_shift..$n_words {
-                    // Shift
-                    ret[i - word_shift] += original[i] >> bit_shift;
-                    // Carry
-                    if bit_shift > 0 && i < $n_words - 1 {
-                        ret[i - word_shift] += original[i + 1] << (64 - bit_shift);
-                    }
-                }
-                $name(ret)
-            }
-        }
-
-        impl ::core::fmt::Debug for $name {
-            fn fmt(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                let &$name(ref data) = self;
-                write!(f, "0x")?;
-                for ch in data.iter().rev() {
-                    write!(f, "{:016x}", ch)?;
-                }
-                Ok(())
-            }
-        }
-
-        display_from_debug!($name);
-
-        impl $crate::consensus::Encodable for $name {
-            #[inline]
-            fn consensus_encode<S: $crate::io::Write>(
-                &self,
-                mut s: S,
-            ) -> Result<usize, $crate::io::Error> {
-                let &$name(ref data) = self;
-                let mut len = 0;
-                for word in data.iter() {
-                    len += word.consensus_encode(&mut s)?;
-                }
-                Ok(len)
-            }
-        }
-
-        impl $crate::consensus::Decodable for $name {
-            fn consensus_decode<D: $crate::io::Read>(
-                mut d: D,
-            ) -> Result<$name, $crate::consensus::encode::Error> {
-                use $crate::consensus::Decodable;
-                let mut ret: [u64; $n_words] = [0; $n_words];
-                for i in 0..$n_words {
-                    ret[i] = Decodable::consensus_decode(&mut d)?;
-                }
-                Ok($name(ret))
-            }
-        }
-
-        #[cfg(feature = "serde")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-        impl $crate::serde::Serialize for $name {
-            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-            where
-                S: $crate::serde::Serializer,
-            {
-                use $crate::hashes::hex::ToHex;
-                let bytes = self.to_be_bytes();
-                if serializer.is_human_readable() {
-                    serializer.serialize_str(&bytes.to_hex())
-                } else {
-                    serializer.serialize_bytes(&bytes)
-                }
-            }
-        }
-
-        #[cfg(feature = "serde")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
-        impl<'de> $crate::serde::Deserialize<'de> for $name {
-            fn deserialize<D: $crate::serde::Deserializer<'de>>(
-                deserializer: D,
-            ) -> Result<Self, D::Error> {
-                use ::core::fmt;
-                use $crate::hashes::hex::FromHex;
-                use $crate::serde::de;
-                struct Visitor;
-                impl<'de> de::Visitor<'de> for Visitor {
-                    type Value = $name;
-
-                    fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result {
-                        write!(f, "{} bytes or a hex string with {} characters", $n_words * 8, $n_words * 8 * 2)
-                    }
-
-                    fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
-                    where
-                        E: de::Error,
-                    {
-                        let bytes = $crate::prelude::Vec::from_hex(s)
-                            .map_err(|_| de::Error::invalid_value(de::Unexpected::Str(s), &self))?;
-                        $name::from_be_slice(&bytes)
-                            .map_err(|_| de::Error::invalid_length(bytes.len() * 2, &self))
-                    }
-
-                    fn visit_bytes<E>(self, bytes: &[u8]) -> Result<Self::Value, E>
-                    where
-                        E: de::Error,
-                    {
-                        $name::from_be_slice(bytes)
-                            .map_err(|_| de::Error::invalid_length(bytes.len(), &self))
-                    }
-                }
-
-                if deserializer.is_human_readable() {
-                    deserializer.deserialize_str(Visitor)
-                } else {
-                    deserializer.deserialize_bytes(Visitor)
-                }
-            }
-        }
-    };
-}
-
-construct_uint!(Uint256, 4);
-construct_uint!(Uint128, 2);
-
-/// Invalid slice length.
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Hash)]
-pub struct ParseLengthError {
-    /// The length of the slice de-facto
-    pub actual: usize,
-    /// The required length of the slice
-    pub expected: usize,
-}
-
-impl ::core::fmt::Display for ParseLengthError {
-    fn fmt(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-        write!(f, "Invalid length: got {}, expected {}", self.actual, self.expected)
-    }
-}
-
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl ::std::error::Error for ParseLengthError {}
-
-impl Uint256 {
-    /// Decay to a uint128
-    #[inline]
-    pub fn low_128(&self) -> Uint128 {
-        let &Uint256(data) = self;
-        Uint128([data[0], data[1]])
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use consensus::{deserialize, serialize};
-    use util::uint::{Uint256, Uint128};
-    use util::BitArray;
-
-    #[test]
-    pub fn uint256_bits_test() {
-        assert_eq!(Uint256::from_u64(255).unwrap().bits(), 8);
-        assert_eq!(Uint256::from_u64(256).unwrap().bits(), 9);
-        assert_eq!(Uint256::from_u64(300).unwrap().bits(), 9);
-        assert_eq!(Uint256::from_u64(60000).unwrap().bits(), 16);
-        assert_eq!(Uint256::from_u64(70000).unwrap().bits(), 17);
-
-        // Try to read the following lines out loud quickly
-        let mut shl = Uint256::from_u64(70000).unwrap();
-        shl = shl << 100;
-        assert_eq!(shl.bits(), 117);
-        shl = shl << 100;
-        assert_eq!(shl.bits(), 217);
-        shl = shl << 100;
-        assert_eq!(shl.bits(), 0);
-
-        // Bit set check
-        assert!(!Uint256::from_u64(10).unwrap().bit(0));
-        assert!(Uint256::from_u64(10).unwrap().bit(1));
-        assert!(!Uint256::from_u64(10).unwrap().bit(2));
-        assert!(Uint256::from_u64(10).unwrap().bit(3));
-        assert!(!Uint256::from_u64(10).unwrap().bit(4));
-    }
-
-    #[test]
-    pub fn uint256_display_test() {
-        assert_eq!(format!("{}", Uint256::from_u64(0xDEADBEEF).unwrap()),
-                   "0x00000000000000000000000000000000000000000000000000000000deadbeef");
-        assert_eq!(format!("{}", Uint256::from_u64(u64::max_value()).unwrap()),
-                   "0x000000000000000000000000000000000000000000000000ffffffffffffffff");
-
-        let max_val = Uint256([0xFFFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF,
-                               0xFFFFFFFFFFFFFFFF]);
-        assert_eq!(format!("{}", max_val),
-                   "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
-    }
-
-    #[test]
-    pub fn uint256_comp_test() {
-        let small = Uint256([10u64, 0, 0, 0]);
-        let big = Uint256([0x8C8C3EE70C644118u64, 0x0209E7378231E632, 0, 0]);
-        let bigger = Uint256([0x9C8C3EE70C644118u64, 0x0209E7378231E632, 0, 0]);
-        let biggest = Uint256([0x5C8C3EE70C644118u64, 0x0209E7378231E632, 0, 1]);
-
-        assert!(small < big);
-        assert!(big < bigger);
-        assert!(bigger < biggest);
-        assert!(bigger <= biggest);
-        assert!(biggest <= biggest);
-        assert!(bigger >= big);
-        assert!(bigger >= small);
-        assert!(small <= small);
-    }
-
-    #[test]
-    pub fn uint_from_be_bytes() {
-        assert_eq!(Uint128::from_be_bytes([0x1b, 0xad, 0xca, 0xfe, 0xde, 0xad, 0xbe, 0xef, 0xde, 0xaf, 0xba, 0xbe, 0x2b, 0xed, 0xfe, 0xed]),
-                   Uint128([0xdeafbabe2bedfeed, 0x1badcafedeadbeef]));
-
-        assert_eq!(Uint256::from_be_bytes([0x1b, 0xad, 0xca, 0xfe, 0xde, 0xad, 0xbe, 0xef, 0xde, 0xaf, 0xba, 0xbe, 0x2b, 0xed, 0xfe, 0xed,
-                                           0xba, 0xad, 0xf0, 0x0d, 0xde, 0xfa, 0xce, 0xda, 0x11, 0xfe, 0xd2, 0xba, 0xd1, 0xc0, 0xff, 0xe0]),
-                   Uint256([0x11fed2bad1c0ffe0, 0xbaadf00ddefaceda, 0xdeafbabe2bedfeed, 0x1badcafedeadbeef]));
-    }
-
-    #[test]
-    pub fn uint_to_be_bytes() {
-        assert_eq!(Uint128([0xdeafbabe2bedfeed, 0x1badcafedeadbeef]).to_be_bytes(),
-                   [0x1b, 0xad, 0xca, 0xfe, 0xde, 0xad, 0xbe, 0xef, 0xde, 0xaf, 0xba, 0xbe, 0x2b, 0xed, 0xfe, 0xed]);
-
-        assert_eq!(Uint256([0x11fed2bad1c0ffe0, 0xbaadf00ddefaceda, 0xdeafbabe2bedfeed, 0x1badcafedeadbeef]).to_be_bytes(),
-                   [0x1b, 0xad, 0xca, 0xfe, 0xde, 0xad, 0xbe, 0xef, 0xde, 0xaf, 0xba, 0xbe, 0x2b, 0xed, 0xfe, 0xed,
-                    0xba, 0xad, 0xf0, 0x0d, 0xde, 0xfa, 0xce, 0xda, 0x11, 0xfe, 0xd2, 0xba, 0xd1, 0xc0, 0xff, 0xe0]);
-    }
-
-    #[test]
-    pub fn uint256_arithmetic_test() {
-        let init = Uint256::from_u64(0xDEADBEEFDEADBEEF).unwrap();
-        let copy = init;
-
-        let add = init + copy;
-        assert_eq!(add, Uint256([0xBD5B7DDFBD5B7DDEu64, 1, 0, 0]));
-        // Bitshifts
-        let shl = add << 88;
-        assert_eq!(shl, Uint256([0u64, 0xDFBD5B7DDE000000, 0x1BD5B7D, 0]));
-        let shr = shl >> 40;
-        assert_eq!(shr, Uint256([0x7DDE000000000000u64, 0x0001BD5B7DDFBD5B, 0, 0]));
-        // Increment
-        let mut incr = shr;
-        incr.increment();
-        assert_eq!(incr, Uint256([0x7DDE000000000001u64, 0x0001BD5B7DDFBD5B, 0, 0]));
-        // Subtraction
-        let sub = incr - init;
-        assert_eq!(sub, Uint256([0x9F30411021524112u64, 0x0001BD5B7DDFBD5A, 0, 0]));
-        // Multiplication
-        let mult = sub.mul_u32(300);
-        assert_eq!(mult, Uint256([0x8C8C3EE70C644118u64, 0x0209E7378231E632, 0, 0]));
-        // Division
-        assert_eq!(Uint256::from_u64(105).unwrap() /
-                   Uint256::from_u64(5).unwrap(),
-                   Uint256::from_u64(21).unwrap());
-        let div = mult / Uint256::from_u64(300).unwrap();
-        assert_eq!(div, Uint256([0x9F30411021524112u64, 0x0001BD5B7DDFBD5A, 0, 0]));
-
-        assert_eq!(Uint256::from_u64(105).unwrap() % Uint256::from_u64(5).unwrap(),
-                   Uint256::from_u64(0).unwrap());
-        assert_eq!(Uint256::from_u64(35498456).unwrap() % Uint256::from_u64(3435).unwrap(),
-                   Uint256::from_u64(1166).unwrap());
-        let rem_src = mult * Uint256::from_u64(39842).unwrap() + Uint256::from_u64(9054).unwrap();
-        assert_eq!(rem_src % Uint256::from_u64(39842).unwrap(),
-                   Uint256::from_u64(9054).unwrap());
-        // TODO: bit inversion
-    }
-
-    #[test]
-    pub fn mul_u32_test() {
-        let u64_val = Uint256::from_u64(0xDEADBEEFDEADBEEF).unwrap();
-
-        let u96_res = u64_val.mul_u32(0xFFFFFFFF);
-        let u128_res = u96_res.mul_u32(0xFFFFFFFF);
-        let u160_res = u128_res.mul_u32(0xFFFFFFFF);
-        let u192_res = u160_res.mul_u32(0xFFFFFFFF);
-        let u224_res = u192_res.mul_u32(0xFFFFFFFF);
-        let u256_res = u224_res.mul_u32(0xFFFFFFFF);
-
-        assert_eq!(u96_res, Uint256([0xffffffff21524111u64, 0xDEADBEEE, 0, 0]));
-        assert_eq!(u128_res, Uint256([0x21524111DEADBEEFu64, 0xDEADBEEE21524110, 0, 0]));
-        assert_eq!(u160_res, Uint256([0xBD5B7DDD21524111u64, 0x42A4822200000001, 0xDEADBEED, 0]));
-        assert_eq!(u192_res, Uint256([0x63F6C333DEADBEEFu64, 0xBD5B7DDFBD5B7DDB, 0xDEADBEEC63F6C334, 0]));
-        assert_eq!(u224_res, Uint256([0x7AB6FBBB21524111u64, 0xFFFFFFFBA69B4558, 0x854904485964BAAA, 0xDEADBEEB]));
-        assert_eq!(u256_res, Uint256([0xA69B4555DEADBEEFu64, 0xA69B455CD41BB662, 0xD41BB662A69B4550, 0xDEADBEEAA69B455C]));
-    }
-
-    #[test]
-    pub fn multiplication_test() {
-        let u64_val = Uint256::from_u64(0xDEADBEEFDEADBEEF).unwrap();
-
-        let u128_res = u64_val * u64_val;
-
-        assert_eq!(u128_res, Uint256([0x048D1354216DA321u64, 0xC1B1CD13A4D13D46, 0, 0]));
-
-        let u256_res = u128_res * u128_res;
-
-        assert_eq!(u256_res, Uint256([0xF4E166AAD40D0A41u64, 0xF5CF7F3618C2C886u64,
-                                      0x4AFCFF6F0375C608u64, 0x928D92B4D7F5DF33u64]));
-    }
-
-    #[test]
-    pub fn increment_test() {
-        let mut val = Uint256([
-            0xFFFFFFFFFFFFFFFEu64,
-            0xFFFFFFFFFFFFFFFFu64,
-            0xFFFFFFFFFFFFFFFFu64,
-            0xEFFFFFFFFFFFFFFFu64,
-        ]);
-        val.increment();
-        assert_eq!(
-            val,
-            Uint256([
-                0xFFFFFFFFFFFFFFFFu64,
-                0xFFFFFFFFFFFFFFFFu64,
-                0xFFFFFFFFFFFFFFFFu64,
-                0xEFFFFFFFFFFFFFFFu64,
-            ])
-        );
-        val.increment();
-        assert_eq!(
-            val,
-            Uint256([
-                0x0000000000000000u64,
-                0x0000000000000000u64,
-                0x0000000000000000u64,
-                0xF000000000000000u64,
-            ])
-        );
-
-        let mut val = Uint256([
-            0xFFFFFFFFFFFFFFFFu64,
-            0xFFFFFFFFFFFFFFFFu64,
-            0xFFFFFFFFFFFFFFFFu64,
-            0xFFFFFFFFFFFFFFFFu64,
-        ]);
-        val.increment();
-        assert_eq!(
-            val,
-            Uint256([
-                0x0000000000000000u64,
-                0x0000000000000000u64,
-                0x0000000000000000u64,
-                0x0000000000000000u64,
-            ])
-        );
-    }
-
-    #[test]
-    pub fn uint256_bitslice_test() {
-        let init = Uint256::from_u64(0xDEADBEEFDEADBEEF).unwrap();
-        let add = init + (init << 64);
-        assert_eq!(add.bit_slice(64, 128), init);
-        assert_eq!(add.mask(64), init);
-    }
-
-    #[test]
-    pub fn uint256_extreme_bitshift_test() {
-        // Shifting a u64 by 64 bits gives an undefined value, so make sure that
-        // we're doing the Right Thing here
-        let init = Uint256::from_u64(0xDEADBEEFDEADBEEF).unwrap();
-
-        assert_eq!(init << 64, Uint256([0, 0xDEADBEEFDEADBEEF, 0, 0]));
-        let add = (init << 64) + init;
-        assert_eq!(add, Uint256([0xDEADBEEFDEADBEEF, 0xDEADBEEFDEADBEEF, 0, 0]));
-        assert_eq!(add >> 0, Uint256([0xDEADBEEFDEADBEEF, 0xDEADBEEFDEADBEEF, 0, 0]));
-        assert_eq!(add << 0, Uint256([0xDEADBEEFDEADBEEF, 0xDEADBEEFDEADBEEF, 0, 0]));
-        assert_eq!(add >> 64, Uint256([0xDEADBEEFDEADBEEF, 0, 0, 0]));
-        assert_eq!(add << 64, Uint256([0, 0xDEADBEEFDEADBEEF, 0xDEADBEEFDEADBEEF, 0]));
-    }
-
-    #[test]
-    pub fn uint256_serialize_test() {
-        let start1 = Uint256([0x8C8C3EE70C644118u64, 0x0209E7378231E632, 0, 0]);
-        let start2 = Uint256([0x8C8C3EE70C644118u64, 0x0209E7378231E632, 0xABCD, 0xFFFF]);
-        let serial1 = serialize(&start1);
-        let serial2 = serialize(&start2);
-        let end1: Result<Uint256, _> = deserialize(&serial1);
-        let end2: Result<Uint256, _> = deserialize(&serial2);
-
-        assert_eq!(end1.ok(), Some(start1));
-        assert_eq!(end2.ok(), Some(start2));
-    }
-
-    #[cfg(feature = "serde")]
-    #[test]
-    pub fn uint256_serde_test() {
-        let check = |uint, hex| {
-            let json = format!("\"{}\"", hex);
-            assert_eq!(::serde_json::to_string(&uint).unwrap(), json);
-            assert_eq!(::serde_json::from_str::<Uint256>(&json).unwrap(), uint);
-
-            let bin_encoded = ::bincode::serialize(&uint).unwrap();
-            let bin_decoded: Uint256 = ::bincode::deserialize(&bin_encoded).unwrap();
-            assert_eq!(bin_decoded, uint);
-        };
-
-        check(
-            Uint256::from_u64(0).unwrap(),
-            "0000000000000000000000000000000000000000000000000000000000000000",
-        );
-        check(
-            Uint256::from_u64(0xDEADBEEF).unwrap(),
-            "00000000000000000000000000000000000000000000000000000000deadbeef",
-        );
-        check(
-            Uint256([0xaa11, 0xbb22, 0xcc33, 0xdd44]),
-            "000000000000dd44000000000000cc33000000000000bb22000000000000aa11",
-        );
-        check(
-            Uint256([u64::max_value(), u64::max_value(), u64::max_value(), u64::max_value()]),
-            "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
-        );
-        check(
-            Uint256([ 0xA69B4555DEADBEEF, 0xA69B455CD41BB662, 0xD41BB662A69B4550, 0xDEADBEEAA69B455C ]),
-            "deadbeeaa69b455cd41bb662a69b4550a69b455cd41bb662a69b4555deadbeef",
-        );
-
-        assert!(::serde_json::from_str::<Uint256>("\"fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffg\"").is_err()); // invalid char
-        assert!(::serde_json::from_str::<Uint256>("\"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff\"").is_err()); // invalid length
-        assert!(::serde_json::from_str::<Uint256>("\"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff\"").is_err()); // invalid length
-    }
-}