ebfull · czarcas7ic · Apr 17, 2026 · Apr 17, 2026 · Apr 17, 2026 · Apr 2, 2026
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Run tests
-        run: cargo test --verbose
+        run: cargo test --workspace --verbose
       - name: Verify working directory is clean
         run: git diff --exit-code
 
@@ -32,7 +32,7 @@ jobs:
       - name: Remove lockfile to build with latest dependencies
         run: rm Cargo.lock
       - name: Build crate
-        run: cargo build --all-features --verbose
+        run: cargo build --workspace --all-features --verbose
       - name: Verify working directory is clean (excluding lockfile)
         run: git diff --exit-code ':!Cargo.lock'
 
@@ -42,7 +42,7 @@ jobs:
     strategy:
       matrix:
         target:
-          - wasm32-wasi
+          - wasm32-wasip1
           - thumbv7em-none-eabihf
     steps:
       - uses: actions/checkout@v4
@@ -67,9 +67,9 @@ jobs:
       - name: Add lazy_static with the spin_no_std feature
         working-directory: ./ci-build
         run: cargo add lazy_static --no-default-features --features "spin_no_std"
-      - name: Add typenum with the no_std feature
+      - name: Add typenum with no default features
         working-directory: ./ci-build
-        run: cargo add typenum --no-default-features --features "no_std"
+        run: cargo add typenum --no-default-features
       - name: Show Cargo.toml for the synthetic crate
         working-directory: ./ci-build
         run: cat Cargo.toml
@@ -89,7 +89,7 @@ jobs:
       - uses: actions/checkout@v4
       # Build benchmarks to prevent bitrot
       - name: Build benchmarks
-        run: cargo build --benches
+        run: cargo build --workspace --benches
 
   book:
     name: Book tests
@@ -113,7 +113,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Generate coverage report
-        run: cargo tarpaulin --engine llvm --all-features --release --timeout 600 --out xml
+        run: cargo tarpaulin --workspace --engine llvm --all-features --release --timeout 600 --out xml
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v3.1.4
 
@@ -126,7 +126,7 @@ jobs:
       # Requires #![deny(rustdoc::broken_intra_doc_links)] in crates.
       - run: sudo apt-get -y install libfontconfig1-dev
       - name: Check intra-doc links
-        run: cargo doc --all-features --document-private-items
+        run: cargo doc --workspace --all-features --document-private-items
 
   fmt:
     name: Rustfmt

diff --git a/.github/workflows/lints-stable.yml b/.github/workflows/lints-stable.yml
@@ -23,7 +23,7 @@ jobs:
     strategy:
       matrix:
         target:
-          - wasm32-wasi
+          - wasm32-wasip1
     steps:
       - uses: actions/checkout@v4
         with:
@@ -47,9 +47,9 @@ jobs:
       - name: Add lazy_static with the spin_no_std feature
         working-directory: ./ci-build
         run: cargo add lazy_static --no-default-features --features "spin_no_std"
-      - name: Add typenum with the no_std feature
+      - name: Add typenum with no default features
         working-directory: ./ci-build
-        run: cargo add typenum --no-default-features --features "no_std"
+        run: cargo add typenum --no-default-features
       - name: Show Cargo.toml for the synthetic crate
         working-directory: ./ci-build
         run: cat Cargo.toml

diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -8,8 +8,11 @@ and this project adheres to Rust's notion of
 ## [Unreleased]
 
 ### Changed
+- MSRV is now 1.85.1
+- Migrated from yanked `core2` library to `corez`
 - `orchard::pczt::Bundle::extract` now takes its `self` argument by
   reference instead of by value.
+- `orchard::zip32::Error` has added variant `MaxDerivationDepth`
 
 ## [0.12.0] - 2025-12-05
 

diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
@@ -1,20 +1,25 @@
+[workspace]
+members = [".", "public"]
+
+[workspace.dependencies]
+__impl = { version = "=0.12.0", path = ".", package = "orchard_internal", default-features = false }
+
 [package]
-name = "orchard"
+name = "orchard_internal"
 version = "0.12.0"
 authors = [
-    "Sean Bowe",
-    "Jack Grigg <jack@electriccoin.co>",
+    "Sean Bowe <ewillbefull@gmail.com>",
+    "Jack Grigg <thestr4d@gmail.com>",
     "Daira-Emma Hopwood <daira@jacaranda.org>",
     "Ying Tong Lai",
-    "Kris Nuttycombe <kris@electriccoin.co>",
+    "Kris Nuttycombe <kris@nutty.land>",
 ]
 edition = "2021"
-rust-version = "1.70"
+rust-version = "1.85.1"
 description = "The Orchard shielded transaction protocol"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/zcash/orchard"
-documentation = "https://docs.rs/orchard"
-readme = "README.md"
+readme = "INTERNAL-README.md"
 categories = ["cryptography::cryptocurrencies"]
 keywords = ["zcash"]
 
@@ -59,7 +64,7 @@ getset = "0.1"
 tracing = { version = "0.1", default-features = false }
 
 # No-std support
-core2 = { version = "0.3", default-features = false, features = ["alloc"] }
+corez = { version = "0.1.1", default-features = false, features = ["alloc"] }
 
 # Developer tooling dependencies
 image = { version = "0.24", optional = true }
@@ -83,7 +88,7 @@ bench = false
 
 [features]
 default = ["circuit", "multicore", "std"]
-std = ["core2/std", "group/wnaf-memuse", "reddsa/std"]
+std = ["corez/std", "group/wnaf-memuse", "reddsa/std"]
 circuit = ["dep:halo2_gadgets", "dep:halo2_proofs", "std"]
 unstable-frost = []
 multicore = ["halo2_proofs?/multicore"]

diff --git a/INTERNAL-README.md b/INTERNAL-README.md
@@ -0,0 +1,3 @@
+# orchard_internal
+
+This is the implementation crate for the Orchard shielded transaction protocol. It is not intended to be used directly. Depend on the [`orchard`](https://crates.io/crates/orchard) crate instead, which re-exports the public API from this crate.
diff --git a/LICENSE-MIT b/LICENSE-MIT
@@ -1,6 +1,7 @@
 The MIT License (MIT)
 
-Copyright (c) 2020-2023 The Electric Coin Company
+Copyright (c) 2020-2025 The Electric Coin Company
+Copyright (c) 2026 Zcash Open Development Lab
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

diff --git a/README.md b/README.md
@@ -1,6 +1,6 @@
 # orchard [![Crates.io](https://img.shields.io/crates/v/orchard.svg)](https://crates.io/crates/orchard) #
 
-Requires Rust 1.66+.
+Requires Rust 1.85.1+.
 
 ## Documentation
 
@@ -10,13 +10,9 @@ Requires Rust 1.66+.
 ## `no_std` compatibility
 
 In order to take advantage of `no_std` builds, downstream users of this crate
-must enable:
-
-* the `spin_no_std` feature of the `lazy_static` crate; and
-* the `no_std` feature of the `typenum` crate.
-
-This is needed because the `--no-default-features` builds of these crates still
-rely on `std`.
+must enable the `spin_no_std` feature of the `lazy_static` crate. This is
+needed because the `--no-default-features` build of `lazy_static` still relies
+on `std`.
 
 ## License
 

diff --git a/benches/circuit.rs b/benches/circuit.rs
@@ -6,7 +6,7 @@ use criterion::{BenchmarkId, Criterion};
 #[cfg(unix)]
 use pprof::criterion::{Output, PProfProfiler};
 
-use orchard::{
+use orchard_internal::{
     builder::{Builder, BundleType},
     circuit::{ProvingKey, VerifyingKey},
     keys::{FullViewingKey, Scope, SpendingKey},

diff --git a/benches/note_decryption.rs b/benches/note_decryption.rs
@@ -1,5 +1,5 @@
 use criterion::{criterion_group, criterion_main, BenchmarkId, Criterion, Throughput};
-use orchard::{
+use orchard_internal::{
     builder::{Builder, BundleType},
     circuit::ProvingKey,
     keys::{FullViewingKey, PreparedIncomingViewingKey, Scope, SpendingKey},

diff --git a/benches/small.rs b/benches/small.rs
@@ -1,5 +1,5 @@
 use criterion::{criterion_group, criterion_main, Criterion};
-use orchard::keys::{FullViewingKey, Scope, SpendingKey};
+use orchard_internal::keys::{FullViewingKey, Scope, SpendingKey};
 
 fn key_derivation(c: &mut Criterion) {
     // Meaningless random spending key.

diff --git a/public/Cargo.toml b/public/Cargo.toml
@@ -0,0 +1,41 @@
+[package]
+name = "orchard"
+version = "0.12.0"
+authors = [
+    "Sean Bowe <ewillbefull@gmail.com>",
+    "Jack Grigg <thestr4d@gmail.com>",
+    "Daira-Emma Hopwood <daira@jacaranda.org>",
+    "Ying Tong Lai",
+    "Kris Nuttycombe <kris@nutty.land>",
+]
+edition = "2021"
+rust-version = "1.70"
+description = "The Orchard shielded transaction protocol"
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/zcash/orchard"
+documentation = "https://docs.rs/orchard"
+readme = "README.md"
+categories = ["cryptography::cryptocurrencies"]
+keywords = ["zcash"]
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs", "--html-in-header", "katex-header.html"]
+
+[dependencies]
+__impl = { workspace = true }
+
+[features]
+default = ["circuit", "multicore", "std"]
+std = ["__impl/std"]
+circuit = ["__impl/circuit"]
+multicore = ["__impl/multicore"]
+unstable-frost = ["__impl/unstable-frost"]
+dev-graph = ["__impl/dev-graph"]
+test-dependencies = ["__impl/test-dependencies"]
+
+[dev-dependencies]
+incrementalmerkletree = "0.8.1"
+rand = "0.8"
+shardtree = "0.6"
+zcash_note_encryption = "0.4"
diff --git a/public/LICENSE-APACHE b/public/LICENSE-APACHE
@@ -0,0 +1 @@
+../LICENSE-APACHE
diff --git a/public/LICENSE-MIT b/public/LICENSE-MIT
@@ -0,0 +1 @@
+../LICENSE-MIT
diff --git a/public/README.md b/public/README.md
@@ -0,0 +1 @@
+../README.md
diff --git a/public/katex-header.html b/public/katex-header.html
@@ -0,0 +1 @@
+../katex-header.html
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		# orchard_internal

		This is the implementation crate for the Orchard shielded transaction protocol. It is not intended to be used directly. Depend on the [`orchard`](https://crates.io/crates/orchard) crate instead, which re-exports the public API from this crate.