diff --git a/Cargo.lock b/Cargo.lock
index 20ba30c600..42fa55e9e0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,43 +1,13 @@
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 # It is not intended for manual editing.
 [[package]]
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- "opaque-debug",
-]
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-[[package]]
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 dependencies = [
- "block-cipher-trait",
- "opaque-debug",
- "stream-cipher",
+ "lazy_static",
+ "regex",
 ]
 
 [[package]]
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-[[package]]
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- "winapi 0.3.8",
+ "approx",
+ "num-complex",
+ "num-traits",
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+name = "approx"
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+checksum = "f0e60b75072ecd4168020818c0107f2857bb6c4e64252d8d3983f6263b40a5c3"
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- "ole32-sys",
- "shell32-sys",
- "winapi 0.2.8",
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+ "num-traits",
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@@ -115,36 +69,6 @@ version = "0.5.1"
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-dependencies = [
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-]
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-dependencies = [
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- "libc",
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@@ -185,37 +109,6 @@ version = "0.1.0"
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@@ -238,18 +131,6 @@ dependencies = [
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-dependencies = [
+ "byteorder",
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@@ -290,27 +162,6 @@ dependencies = [
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-name = "substrate-consensus-babe"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "derive_more 0.15.0",
- "fork-tree",
- "futures 0.1.29",
- "futures-preview",
- "futures-timer",
- "log",
- "merlin",
- "num-bigint",
- "num-rational",
- "num-traits",
- "parity-scale-codec",
- "parking_lot 0.9.0",
- "pdqselect",
- "rand 0.7.3",
- "schnorrkel",
- "sr-io",
- "sr-primitives",
- "sr-version",
- "srml-babe",
- "srml-support",
- "substrate-application-crypto",
- "substrate-client",
- "substrate-consensus-babe-primitives",
- "substrate-consensus-common",
- "substrate-consensus-slots",
- "substrate-consensus-uncles",
- "substrate-header-metadata",
- "substrate-inherents",
- "substrate-keystore",
- "substrate-primitives",
- "substrate-telemetry",
-]
-
-[[package]]
-name = "substrate-consensus-babe-primitives"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "parity-scale-codec",
- "schnorrkel",
- "sr-primitives",
- "sr-std",
- "substrate-application-crypto",
- "substrate-client",
- "substrate-consensus-slots",
-]
-
-[[package]]
-name = "substrate-consensus-common"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "derive_more 0.15.0",
- "futures-preview",
- "futures-timer",
- "libp2p",
- "log",
- "parity-scale-codec",
- "parking_lot 0.9.0",
- "sr-primitives",
- "sr-std",
- "sr-version",
- "substrate-inherents",
- "substrate-primitives",
-]
-
-[[package]]
-name = "substrate-consensus-slots"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "futures-preview",
- "futures-timer",
- "log",
- "parity-scale-codec",
- "parking_lot 0.9.0",
- "sr-primitives",
- "substrate-client",
- "substrate-consensus-common",
- "substrate-inherents",
- "substrate-primitives",
- "substrate-telemetry",
-]
-
-[[package]]
-name = "substrate-consensus-uncles"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "log",
- "sr-primitives",
- "srml-authorship",
- "substrate-client",
- "substrate-consensus-common",
- "substrate-inherents",
- "substrate-primitives",
-]
-
-[[package]]
-name = "substrate-content-working-group-module"
-version = "1.1.0"
-dependencies = [
- "parity-scale-codec",
- "serde",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-balances",
- "srml-support",
- "srml-system",
- "srml-timestamp",
- "substrate-common-module",
- "substrate-forum-module",
- "substrate-hiring-module",
- "substrate-membership-module",
- "substrate-primitives",
- "substrate-recurring-reward-module",
- "substrate-stake-module",
- "substrate-token-mint-module",
- "substrate-versioned-store",
- "substrate-versioned-store-permissions-module",
-]
-
-[[package]]
-name = "substrate-debug-derive"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "proc-macro2 1.0.10",
- "quote 1.0.3",
- "syn 1.0.17",
-]
-
-[[package]]
-name = "substrate-executor"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "derive_more 0.15.0",
- "lazy_static",
- "libsecp256k1",
- "log",
- "parity-scale-codec",
- "parity-wasm",
- "parking_lot 0.9.0",
- "sr-io",
- "sr-version",
- "substrate-externalities",
- "substrate-panic-handler",
- "substrate-primitives",
- "substrate-serializer",
- "substrate-trie",
- "substrate-wasm-interface",
- "tiny-keccak",
- "wasmi",
-]
-
-[[package]]
-name = "substrate-externalities"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "environmental",
- "primitive-types",
- "sr-std",
- "substrate-primitives-storage",
-]
-
-[[package]]
-name = "substrate-finality-grandpa"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "finality-grandpa",
- "fork-tree",
- "futures 0.1.29",
- "futures-preview",
- "log",
- "parity-scale-codec",
- "parking_lot 0.9.0",
- "rand 0.7.3",
- "serde_json",
- "sr-primitives",
- "srml-finality-tracker",
- "substrate-client",
- "substrate-consensus-common",
- "substrate-finality-grandpa-primitives",
- "substrate-header-metadata",
- "substrate-inherents",
- "substrate-keystore",
- "substrate-network",
- "substrate-primitives",
- "substrate-telemetry",
- "tokio-executor",
- "tokio-timer",
-]
-
-[[package]]
-name = "substrate-finality-grandpa-primitives"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "parity-scale-codec",
- "serde",
- "sr-primitives",
- "sr-std",
- "substrate-application-crypto",
- "substrate-client",
-]
-
-[[package]]
-name = "substrate-forum-module"
-version = "1.2.2"
-dependencies = [
- "hex-literal 0.1.4",
- "parity-scale-codec",
- "quote 0.6.13",
- "serde",
- "serde_derive",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-balances",
- "srml-support",
- "srml-support-procedural",
- "srml-system",
- "srml-timestamp",
- "substrate-common-module",
- "substrate-primitives",
-]
-
-[[package]]
-name = "substrate-governance-module"
-version = "1.0.0"
-dependencies = [
- "parity-scale-codec",
- "serde",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-balances",
- "srml-support",
- "srml-system",
- "srml-timestamp",
- "substrate-common-module",
- "substrate-membership-module",
- "substrate-primitives",
- "substrate-recurring-reward-module",
- "substrate-token-mint-module",
-]
-
-[[package]]
-name = "substrate-header-metadata"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "lru-cache",
- "parking_lot 0.9.0",
- "sr-primitives",
-]
-
-[[package]]
-name = "substrate-hiring-module"
-version = "1.0.2"
-dependencies = [
- "hex-literal 0.1.4",
- "mockall",
- "parity-scale-codec",
- "quote 0.6.13",
- "serde",
- "serde_derive",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-balances",
- "srml-support",
- "srml-support-procedural",
- "srml-system",
- "srml-timestamp",
- "substrate-primitives",
- "substrate-stake-module",
-]
-
-[[package]]
-name = "substrate-inherents"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "parity-scale-codec",
- "parking_lot 0.9.0",
- "sr-primitives",
- "sr-std",
-]
-
-[[package]]
-name = "substrate-keyring"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "lazy_static",
- "sr-primitives",
- "strum",
- "strum_macros",
- "substrate-primitives",
-]
-
-[[package]]
-name = "substrate-keystore"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "derive_more 0.15.0",
- "hex 0.3.2",
- "parking_lot 0.9.0",
- "rand 0.7.3",
- "serde_json",
- "substrate-application-crypto",
- "substrate-primitives",
- "subtle 2.2.2",
-]
-
-[[package]]
-name = "substrate-membership-module"
-version = "1.1.0"
-dependencies = [
- "parity-scale-codec",
- "serde",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-balances",
- "srml-support",
- "srml-system",
- "srml-timestamp",
- "substrate-common-module",
- "substrate-primitives",
-]
-
-[[package]]
-name = "substrate-memo-module"
-version = "1.0.0"
-dependencies = [
- "parity-scale-codec",
- "serde",
- "sr-primitives",
- "sr-std",
- "srml-support",
- "srml-system",
- "substrate-common-module",
-]
-
-[[package]]
-name = "substrate-network"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "bitflags",
- "bytes 0.4.12",
- "derive_more 0.15.0",
- "either",
- "erased-serde",
- "fnv",
- "fork-tree",
- "futures 0.1.29",
- "futures-preview",
- "futures-timer",
- "libp2p",
- "linked-hash-map",
- "linked_hash_set",
- "log",
- "lru-cache",
- "parity-scale-codec",
- "parking_lot 0.9.0",
- "rand 0.7.3",
- "rustc-hex",
- "serde",
- "serde_json",
- "slog",
- "slog_derive",
- "smallvec 0.6.13",
- "sr-primitives",
- "substrate-client",
- "substrate-consensus-babe-primitives",
- "substrate-consensus-common",
- "substrate-header-metadata",
- "substrate-peerset",
- "substrate-primitives",
- "tokio-io",
- "unsigned-varint 0.2.3",
- "void",
- "zeroize 0.10.1",
-]
-
-[[package]]
-name = "substrate-offchain"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "bytes 0.4.12",
- "fnv",
- "futures 0.1.29",
- "futures-preview",
- "futures-timer",
- "hyper",
- "hyper-rustls",
- "log",
- "num_cpus",
- "parity-scale-codec",
- "parking_lot 0.9.0",
- "rand 0.7.3",
- "sr-primitives",
- "substrate-client",
- "substrate-keystore",
- "substrate-network",
- "substrate-offchain-primitives",
- "substrate-primitives",
- "substrate-transaction-pool",
- "threadpool",
-]
-
-[[package]]
-name = "substrate-offchain-primitives"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "sr-primitives",
- "substrate-client",
-]
-
-[[package]]
-name = "substrate-panic-handler"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "backtrace",
- "log",
-]
-
-[[package]]
-name = "substrate-peerset"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "futures-preview",
- "libp2p",
- "linked-hash-map",
- "log",
- "lru-cache",
- "serde_json",
-]
-
-[[package]]
-name = "substrate-phragmen"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "serde",
- "sr-primitives",
- "sr-std",
-]
-
-[[package]]
-name = "substrate-primitives"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
+name = "sp-core"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
  "base58",
  "blake2-rfc",
- "byteorder 1.3.4",
- "ed25519-dalek 0.9.1",
+ "byteorder",
+ "derive_more",
+ "ed25519-dalek",
+ "futures",
  "hash-db",
  "hash256-std-hasher",
- "hex 0.4.2",
- "impl-serde 0.2.3",
+ "hex",
+ "impl-serde 0.3.0",
  "lazy_static",
  "libsecp256k1",
  "log",
+ "merlin",
  "num-traits",
  "parity-scale-codec",
- "parking_lot 0.9.0",
+ "parity-util-mem",
+ "parking_lot 0.10.0",
  "primitive-types",
  "rand 0.7.3",
  "regex",
- "rustc-hex",
  "schnorrkel",
  "serde",
  "sha2",
- "sr-std",
+ "sp-debug-derive",
+ "sp-externalities",
+ "sp-runtime-interface",
+ "sp-std",
+ "sp-storage",
  "substrate-bip39",
- "substrate-debug-derive",
- "substrate-externalities",
- "substrate-primitives-storage",
  "tiny-bip39",
  "tiny-keccak",
  "twox-hash",
- "wasmi",
- "zeroize 0.10.1",
-]
-
-[[package]]
-name = "substrate-primitives-storage"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "impl-serde 0.2.3",
- "serde",
- "sr-std",
- "substrate-debug-derive",
+ "wasmi",
+ "zeroize",
 ]
 
 [[package]]
-name = "substrate-proposals-codex-module"
-version = "2.1.0"
-dependencies = [
- "num_enum",
- "parity-scale-codec",
- "serde",
- "sr-io",
- "sr-primitives",
- "sr-staking-primitives",
- "sr-std",
- "srml-balances",
- "srml-staking",
- "srml-staking-reward-curve",
- "srml-support",
- "srml-system",
- "srml-timestamp",
- "substrate-common-module",
- "substrate-content-working-group-module",
- "substrate-governance-module",
- "substrate-hiring-module",
- "substrate-membership-module",
- "substrate-primitives",
- "substrate-proposals-discussion-module",
- "substrate-proposals-engine-module",
- "substrate-recurring-reward-module",
- "substrate-stake-module",
- "substrate-token-mint-module",
- "substrate-versioned-store",
- "substrate-versioned-store-permissions-module",
- "substrate-working-group-module",
-]
-
-[[package]]
-name = "substrate-proposals-discussion-module"
-version = "2.0.0"
+name = "sp-debug-derive"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
- "num_enum",
- "parity-scale-codec",
- "serde",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-balances",
- "srml-support",
- "srml-system",
- "srml-timestamp",
- "substrate-common-module",
- "substrate-membership-module",
- "substrate-primitives",
+ "proc-macro2",
+ "quote",
+ "syn",
 ]
 
 [[package]]
-name = "substrate-proposals-engine-module"
-version = "2.0.0"
+name = "sp-externalities"
+version = "0.8.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
- "mockall",
- "num_enum",
+ "environmental",
  "parity-scale-codec",
- "serde",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-balances",
- "srml-support",
- "srml-system",
- "srml-timestamp",
- "substrate-common-module",
- "substrate-membership-module",
- "substrate-primitives",
- "substrate-stake-module",
+ "sp-std",
+ "sp-storage",
 ]
 
 [[package]]
-name = "substrate-recurring-reward-module"
-version = "1.0.1"
+name = "sp-inherents"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
- "hex-literal 0.1.4",
+ "derive_more",
  "parity-scale-codec",
- "quote 0.6.13",
- "serde",
- "serde_derive",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-balances",
- "srml-support",
- "srml-support-procedural",
- "srml-system",
- "srml-timestamp",
- "substrate-primitives",
- "substrate-token-mint-module",
+ "parking_lot 0.10.0",
+ "sp-core",
+ "sp-std",
 ]
 
 [[package]]
-name = "substrate-rpc"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
+name = "sp-io"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
- "futures-preview",
+ "futures",
  "hash-db",
- "jsonrpc-core 14.0.5",
- "jsonrpc-pubsub",
- "log",
- "parity-scale-codec",
- "parking_lot 0.9.0",
- "serde_json",
- "sr-primitives",
- "sr-version",
- "substrate-client",
- "substrate-executor",
- "substrate-keystore",
- "substrate-primitives",
- "substrate-rpc-api",
- "substrate-rpc-primitives",
- "substrate-session",
- "substrate-state-machine",
- "substrate-transaction-pool",
-]
-
-[[package]]
-name = "substrate-rpc-api"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
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- "futures-preview",
- "jsonrpc-core 14.0.5",
- "jsonrpc-core-client",
- "jsonrpc-derive",
- "jsonrpc-pubsub",
+ "libsecp256k1",
  "log",
  "parity-scale-codec",
- "parking_lot 0.9.0",
- "serde",
- "serde_json",
- "sr-version",
- "substrate-primitives",
- "substrate-rpc-primitives",
- "substrate-transaction-graph",
-]
-
-[[package]]
-name = "substrate-rpc-primitives"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "serde",
- "substrate-primitives",
+ "parking_lot 0.10.0",
+ "sp-core",
+ "sp-externalities",
+ "sp-runtime-interface",
+ "sp-state-machine",
+ "sp-std",
+ "sp-tracing",
+ "sp-trie",
+ "sp-wasm-interface",
 ]
 
 [[package]]
-name = "substrate-rpc-servers"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
+name = "sp-panic-handler"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
- "jsonrpc-core 14.0.5",
- "jsonrpc-http-server",
- "jsonrpc-pubsub",
- "jsonrpc-ws-server",
+ "backtrace",
  "log",
- "serde",
- "serde_json",
- "sr-primitives",
-]
-
-[[package]]
-name = "substrate-serializer"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "serde",
- "serde_json",
 ]
 
 [[package]]
-name = "substrate-service"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
+name = "sp-runtime"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
- "derive_more 0.15.0",
- "exit-future",
- "futures 0.1.29",
- "futures-preview",
- "lazy_static",
+ "either",
+ "hash256-std-hasher",
+ "impl-trait-for-tuples",
  "log",
- "parity-multiaddr 0.5.0",
- "parity-scale-codec",
- "parking_lot 0.9.0",
- "serde",
- "serde_json",
- "slog",
- "sr-io",
- "sr-primitives",
- "substrate-application-crypto",
- "substrate-chain-spec",
- "substrate-client",
- "substrate-client-db",
- "substrate-consensus-common",
- "substrate-executor",
- "substrate-keystore",
- "substrate-network",
- "substrate-offchain",
- "substrate-primitives",
- "substrate-rpc",
- "substrate-rpc-servers",
- "substrate-session",
- "substrate-telemetry",
- "substrate-transaction-pool",
- "sysinfo",
- "target_info",
- "tokio-executor",
- "tokio-timer",
-]
-
-[[package]]
-name = "substrate-service-discovery-module"
-version = "2.0.0"
-dependencies = [
  "parity-scale-codec",
+ "parity-util-mem",
+ "paste",
+ "rand 0.7.3",
  "serde",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-balances",
- "srml-support",
- "srml-system",
- "srml-timestamp",
- "substrate-common-module",
- "substrate-hiring-module",
- "substrate-membership-module",
- "substrate-primitives",
- "substrate-recurring-reward-module",
- "substrate-stake-module",
- "substrate-token-mint-module",
- "substrate-working-group-module",
-]
-
-[[package]]
-name = "substrate-session"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
-dependencies = [
- "sr-primitives",
- "sr-std",
- "substrate-client",
- "substrate-primitives",
+ "sp-application-crypto",
+ "sp-arithmetic",
+ "sp-core",
+ "sp-inherents",
+ "sp-io",
+ "sp-std",
 ]
 
 [[package]]
-name = "substrate-stake-module"
-version = "2.0.0"
+name = "sp-runtime-interface"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
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- "serde",
- "serde_derive",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-balances",
- "srml-support",
- "srml-support-procedural",
- "srml-system",
- "srml-timestamp",
- "substrate-primitives",
+ "primitive-types",
+ "sp-externalities",
+ "sp-runtime-interface-proc-macro",
+ "sp-std",
+ "sp-tracing",
+ "sp-wasm-interface",
+ "static_assertions",
 ]
 
 [[package]]
-name = "substrate-state-db"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
+name = "sp-runtime-interface-proc-macro"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
- "log",
- "parity-scale-codec",
- "parking_lot 0.9.0",
- "substrate-primitives",
+ "Inflector",
+ "proc-macro-crate",
+ "proc-macro2",
+ "quote",
+ "syn",
 ]
 
 [[package]]
-name = "substrate-state-machine"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
+name = "sp-state-machine"
+version = "0.8.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
  "hash-db",
+ "itertools",
  "log",
  "num-traits",
  "parity-scale-codec",
- "parking_lot 0.9.0",
+ "parking_lot 0.10.0",
  "rand 0.7.3",
- "substrate-externalities",
- "substrate-panic-handler",
- "substrate-primitives",
- "substrate-trie",
+ "smallvec 1.4.1",
+ "sp-core",
+ "sp-externalities",
+ "sp-panic-handler",
+ "sp-trie",
  "trie-db",
  "trie-root",
 ]
 
 [[package]]
-name = "substrate-storage-module"
-version = "2.0.0"
-dependencies = [
- "parity-scale-codec",
- "serde",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-balances",
- "srml-support",
- "srml-system",
- "srml-timestamp",
- "substrate-common-module",
- "substrate-hiring-module",
- "substrate-membership-module",
- "substrate-primitives",
- "substrate-recurring-reward-module",
- "substrate-stake-module",
- "substrate-token-mint-module",
- "substrate-working-group-module",
-]
-
-[[package]]
-name = "substrate-telemetry"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
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- "futures-preview",
- "futures-timer",
- "libp2p",
- "log",
- "parking_lot 0.9.0",
- "rand 0.7.3",
- "serde",
- "slog",
- "slog-async",
- "slog-json",
- "slog-scope",
- "tokio-io",
- "void",
-]
+name = "sp-std"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 
 [[package]]
-name = "substrate-token-mint-module"
-version = "1.0.1"
+name = "sp-storage"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
- "hex-literal 0.1.4",
- "parity-scale-codec",
- "quote 0.6.13",
+ "impl-serde 0.2.3",
+ "ref-cast",
  "serde",
- "serde_derive",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-balances",
- "srml-support",
- "srml-support-procedural",
- "srml-system",
- "srml-timestamp",
- "substrate-primitives",
+ "sp-debug-derive",
+ "sp-std",
 ]
 
 [[package]]
-name = "substrate-transaction-graph"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
+name = "sp-timestamp"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
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- "futures-preview",
- "log",
- "parking_lot 0.9.0",
- "serde",
- "sr-primitives",
- "substrate-primitives",
+ "impl-trait-for-tuples",
+ "parity-scale-codec",
+ "sp-api",
+ "sp-inherents",
+ "sp-runtime",
+ "sp-std",
+ "wasm-timer",
 ]
 
 [[package]]
-name = "substrate-transaction-pool"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
+name = "sp-tracing"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
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  "log",
- "parity-scale-codec",
- "parking_lot 0.9.0",
- "sr-primitives",
- "substrate-client",
- "substrate-primitives",
- "substrate-transaction-graph",
+ "rental",
+ "tracing",
 ]
 
 [[package]]
-name = "substrate-trie"
-version = "2.0.0"
-source = "git+https://github.com/paritytech/substrate.git?rev=c37bb08535c49a12320af7facfd555ce05cce2e8#c37bb08535c49a12320af7facfd555ce05cce2e8"
+name = "sp-trie"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
  "hash-db",
  "memory-db",
  "parity-scale-codec",
- "sr-std",
- "substrate-primitives",
+ "sp-core",
+ "sp-std",
  "trie-db",
  "trie-root",
 ]
 
 [[package]]
-name = "substrate-versioned-store"
-version = "1.0.1"
+name = "sp-version"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
- "hex-literal 0.1.4",
+ "impl-serde 0.2.3",
  "parity-scale-codec",
- "quote 0.6.13",
  "serde",
- "serde_derive",
- "sr-io",
- "sr-primitives",
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- "srml-balances",
- "srml-support",
- "srml-support-procedural",
- "srml-system",
- "srml-timestamp",
- "substrate-primitives",
+ "sp-runtime",
+ "sp-std",
 ]
 
 [[package]]
-name = "substrate-versioned-store-permissions-module"
-version = "1.0.1"
+name = "sp-wasm-interface"
+version = "2.0.0-rc4"
+source = "git+https://github.com/paritytech/substrate.git?rev=00768a1f21a579c478fe5d4f51e1fa71f7db9fd4#00768a1f21a579c478fe5d4f51e1fa71f7db9fd4"
 dependencies = [
- "hex-literal 0.1.4",
+ "impl-trait-for-tuples",
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- "quote 0.6.13",
- "serde",
- "serde_derive",
- "sr-io",
- "sr-primitives",
- "sr-std",
- "srml-support",
- "srml-support-procedural",
- "srml-system",
- "srml-timestamp",
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-
-[[package]]
-name = "substrate-wasm-builder-runner"
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-checksum = "e30c70de7e7d5fd404fe26db1e7a4d6b553e2760b1ac490f249c04a960c483b8"
-
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-dependencies = [
+ "sp-std",
  "wasmi",
 ]
 
 [[package]]
-name = "substrate-working-group-module"
-version = "1.1.0"
-dependencies = [
- "parity-scale-codec",
- "serde",
- "sr-io",
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- "substrate-common-module",
- "substrate-hiring-module",
- "substrate-membership-module",
- "substrate-primitives",
- "substrate-recurring-reward-module",
- "substrate-stake-module",
- "substrate-token-mint-module",
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-
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- "quote 1.0.3",
- "syn 1.0.17",
+ "proc-macro2",
+ "quote",
+ "syn",
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  "send_wrapper",
- "tokio-timer",
  "wasm-bindgen",
+ "wasm-bindgen-futures",
  "web-sys",
 ]
 
 [[package]]
 name = "wasmi"
-version = "0.5.1"
+version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f31d26deb2d9a37e6cfed420edce3ed604eab49735ba89035e13c98f9a528313"
+checksum = "bf617d864d25af3587aa745529f7aaa541066c876d57e050c0d0c85c61c92aff"
 dependencies = [
  "libc",
  "memory_units",
@@ -6302,9 +2374,9 @@ dependencies = [
 
 [[package]]
 name = "wasmi-validation"
-version = "0.2.0"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6bc0356e3df56e639fc7f7d8a99741915531e27ed735d911ed83d7e1339c8188"
+checksum = "ea78c597064ba73596099281e2f4cfc019075122a65cdda3205af94f0b264d93"
 dependencies = [
  "parity-wasm",
 ]
@@ -6319,50 +2391,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "webpki"
-version = "0.21.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1f50e1972865d6b1adb54167d1c8ed48606004c2c9d0ea5f1eeb34d95e863ef"
-dependencies = [
- "ring",
- "untrusted",
-]
-
-[[package]]
-name = "webpki-roots"
-version = "0.17.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a262ae37dd9d60f60dd473d1158f9fbebf110ba7b6a5051c8160460f6043718b"
-dependencies = [
- "webpki",
-]
-
-[[package]]
-name = "webpki-roots"
-version = "0.18.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91cd5736df7f12a964a5067a12c62fa38e1bd8080aff1f80bc29be7c80d19ab4"
-dependencies = [
- "webpki",
-]
-
-[[package]]
-name = "which"
-version = "2.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b57acb10231b9493c8472b20cb57317d0679a49e0bdbee44b3b803a6473af164"
-dependencies = [
- "failure",
- "libc",
-]
-
-[[package]]
-name = "winapi"
-version = "0.2.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
-
 [[package]]
 name = "winapi"
 version = "0.3.8"
@@ -6373,107 +2401,18 @@ dependencies = [
  "winapi-x86_64-pc-windows-gnu",
 ]
 
-[[package]]
-name = "winapi-build"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
-
 [[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-util"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa515c5163a99cc82bab70fd3bfdd36d827be85de63737b40fcef2ce084a436e"
-dependencies = [
- "winapi 0.3.8",
-]
-
 [[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 = "ws"
-version = "0.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c51a2c47b5798ccc774ffb93ff536aec7c4275d722fd9c740c83cdd1af1f2d94"
-dependencies = [
- "byteorder 1.3.4",
- "bytes 0.4.12",
- "httparse",
- "log",
- "mio",
- "mio-extras",
- "rand 0.7.3",
- "sha-1",
- "slab",
- "url 2.1.1",
-]
-
-[[package]]
-name = "ws2_32-sys"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
-dependencies = [
- "winapi 0.2.8",
- "winapi-build",
-]
-
-[[package]]
-name = "x25519-dalek"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ee1585dc1484373cbc1cee7aafda26634665cf449436fd6e24bfd1fad230538"
-dependencies = [
- "clear_on_drop",
- "curve25519-dalek 1.2.3",
- "rand_core 0.3.1",
-]
-
-[[package]]
-name = "xdg"
-version = "2.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d089681aa106a86fade1b0128fb5daf07d5867a509ab036d99988dec80429a57"
-
-[[package]]
-name = "yamux"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2758f29014c1cb7a6e74c1b1160ac8c8203be342d35b73462fc6a13cc6385423"
-dependencies = [
- "bytes 0.4.12",
- "futures 0.1.29",
- "log",
- "nohash-hasher",
- "parking_lot 0.9.0",
- "quick-error",
- "rand 0.7.3",
- "tokio-codec",
- "tokio-io",
-]
-
-[[package]]
-name = "zeroize"
-version = "0.9.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45af6a010d13e4cf5b54c94ba5a2b2eba5596b9e46bf5875612d332a1f2b3f86"
-
-[[package]]
-name = "zeroize"
-version = "0.10.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4090487fa66630f7b166fba2bbb525e247a5449f41c468cc1d98f8ae6ac03120"
-
 [[package]]
 name = "zeroize"
 version = "1.1.0"
@@ -6489,8 +2428,8 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "de251eec69fc7c1bc3923403d18ececb929380e016afe103da75f396704f8ca2"
 dependencies = [
- "proc-macro2 1.0.10",
- "quote 1.0.3",
- "syn 1.0.17",
+ "proc-macro2",
+ "quote",
+ "syn",
  "synstructure",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 2db388f05e..a0ab514644 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,26 +1,26 @@
 [workspace]
 members = [
-	"runtime",
-	"runtime-modules/proposals/engine",
-	"runtime-modules/proposals/codex",
-	"runtime-modules/proposals/discussion",
+#	"runtime",
+#	"runtime-modules/proposals/engine",
+#	"runtime-modules/proposals/codex",
+#	"runtime-modules/proposals/discussion",
 	"runtime-modules/common",
-	"runtime-modules/content-working-group",
-	"runtime-modules/forum",
-	"runtime-modules/governance",
+#	"runtime-modules/content-working-group",
+#	"runtime-modules/forum",
+#	"runtime-modules/governance",
 	"runtime-modules/hiring",
 	"runtime-modules/membership",
 	"runtime-modules/memo",
 	"runtime-modules/recurring-reward",
-	"runtime-modules/service-discovery",
+#	"runtime-modules/service-discovery",
 	"runtime-modules/stake",
-	"runtime-modules/storage",
+#	"runtime-modules/storage",
 	"runtime-modules/token-minting",
 	"runtime-modules/versioned-store",
 	"runtime-modules/versioned-store-permissions",
-	"runtime-modules/working-group",
-	"node",
-	"utils/chain-spec-builder/"
+#	"runtime-modules/working-group",
+#	"node",
+#	"utils/chain-spec-builder/"
 ]
 
 [profile.release]
diff --git a/runtime-modules/common/Cargo.toml b/runtime-modules/common/Cargo.toml
index df598a6ca8..ede768bb87 100644
--- a/runtime-modules/common/Cargo.toml
+++ b/runtime-modules/common/Cargo.toml
@@ -1,52 +1,24 @@
 [package]
-name = 'substrate-common-module'
-version = '1.2.0'
+name = 'pallet-common'
+version = '3.0.0'
 authors = ['Joystream contributors']
 edition = '2018'
 
+[dependencies]
+serde = { version = "1.0.101", optional = true, features = ["derive"] }
+codec = { package = 'parity-scale-codec', version = '1.3.1', default-features = false, features = ['derive'] }
+sp-runtime = { package = 'sp-runtime', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+frame-support = { package = 'frame-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+system = { package = 'frame-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+timestamp = { package = 'pallet-timestamp', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+
 [features]
 default = ['std']
 std = [
-	'sr-primitives/std',
-	'srml-support/std',
+	'serde',
+	'codec/std',
+	'sp-runtime/std',
+	'frame-support/std',
 	'system/std',
 	'timestamp/std',
-	'codec/std',
-	'serde'
 ]
-
-
-[dependencies.sr-primitives]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'sr-primitives'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.srml-support]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-support'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.system]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-system'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.codec]
-default-features = false
-features = ['derive']
-package = 'parity-scale-codec'
-version = '1.0.0'
-
-[dependencies.serde]
-features = ['derive']
-optional = true
-version = '1.0.101'
-
-[dependencies.timestamp]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-timestamp'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
\ No newline at end of file
diff --git a/runtime-modules/common/src/currency.rs b/runtime-modules/common/src/currency.rs
index 50d9ebaef0..2daa057358 100644
--- a/runtime-modules/common/src/currency.rs
+++ b/runtime-modules/common/src/currency.rs
@@ -1,5 +1,5 @@
-use sr_primitives::traits::Convert;
-use srml_support::traits::{Currency, LockableCurrency, ReservableCurrency};
+use frame_support::traits::{Currency, LockableCurrency, ReservableCurrency};
+use sp_runtime::traits::Convert;
 
 pub trait GovernanceCurrency: system::Trait + Sized {
     type Currency: Currency<Self::AccountId>
diff --git a/runtime-modules/hiring/Cargo.toml b/runtime-modules/hiring/Cargo.toml
index 6fa631e827..9bc13958b6 100755
--- a/runtime-modules/hiring/Cargo.toml
+++ b/runtime-modules/hiring/Cargo.toml
@@ -1,60 +1,34 @@
 [package]
-name = 'substrate-hiring-module'
-version = '1.0.2'
+name = 'pallet-hiring'
+version = '3.0.0'
 authors = ['Joystream contributors']
 edition = '2018'
 
 [dependencies]
-hex-literal = '0.1.0'
-serde = { version = '1.0', optional = true }
-serde_derive = { version = '1.0', optional = true }
-rstd = { package = 'sr-std', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-runtime-primitives = { package = 'sr-primitives', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-srml-support = { package = 'srml-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-srml-support-procedural = { package = 'srml-support-procedural', git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-system = { package = 'srml-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-balances = { package = 'srml-balances', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-codec = { package = 'parity-scale-codec', version = '1.0.0', default-features = false, features = ['derive'] }
-mockall = {version = "0.6.0", optional = true}
-# https://users.rust-lang.org/t/failure-derive-compilation-error/39062
-quote = '<=1.0.2'
-
-[dependencies.stake]
-default_features = false
-package = 'substrate-stake-module'
-path = '../stake'
-
-[dependencies.timestamp]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-timestamp'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.runtime-io]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'sr-io'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
+serde = { version = "1.0.101", optional = true, features = ["derive"] }
+codec = { package = 'parity-scale-codec', version = '1.3.1', default-features = false, features = ['derive'] }
+rstd = { package = 'sp-std', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+frame-support = { package = 'frame-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+system = { package = 'frame-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-arithmetic = { package = 'sp-arithmetic', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-runtime = { package = 'sp-runtime', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+stake = { package = 'pallet-stake', default-features = false, path = '../stake'}
 
 [dev-dependencies]
-runtime-io = { package = 'sr-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-primitives = { package = 'substrate-primitives', git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-mockall = "0.6.0"
-
+mockall = "0.7.1"
+sp-io = { package = 'sp-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-core = { package = 'sp-core', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+balances = { package = 'pallet-balances', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
 
 [features]
 default = ['std']
-test = ['mockall']
 std = [
 	'serde',
-	'serde_derive',
 	'codec/std',
 	'rstd/std',
-	'runtime-io/std',
-	'runtime-primitives/std',
-	'srml-support/std',
+	'frame-support/std',
 	'system/std',
-  	'balances/std',
-	'timestamp/std',
+	'sp-arithmetic/std',
+	'sp-runtime/std',
 	'stake/std',
-]
+]
\ No newline at end of file
diff --git a/runtime-modules/hiring/src/hiring/opening.rs b/runtime-modules/hiring/src/hiring/opening.rs
index f04e796c66..bca1047b0e 100644
--- a/runtime-modules/hiring/src/hiring/opening.rs
+++ b/runtime-modules/hiring/src/hiring/opening.rs
@@ -191,8 +191,6 @@ pub enum OpeningStage<BlockNumber, ApplicationId> {
 
         /// Deactivated at any time for any cause.
         deactivated_application_count: u32,
-        // Removed at any time.
-        //removed_application_count: u32
     },
 }
 
@@ -401,6 +399,4 @@ pub enum ActivateOpeningAt<BlockNumber> {
 pub struct ApplicationRationingPolicy {
     /// The maximum number of applications that can be on the list at any time.
     pub max_active_applicants: u32,
-    // How applicants will be ranked, in order to respect the maximum simultaneous application limit
-    //pub applicant_ranking: ApplicationRankingPolicy
 }
diff --git a/runtime-modules/hiring/src/lib.rs b/runtime-modules/hiring/src/lib.rs
index cbfd7595b6..c09eab0792 100755
--- a/runtime-modules/hiring/src/lib.rs
+++ b/runtime-modules/hiring/src/lib.rs
@@ -18,31 +18,25 @@
 // Do not delete! Cannot be uncommented by default, because of Parity decl_module! issue.
 //#![warn(missing_docs)]
 
-// Test feature dependencies
-#[cfg(all(any(test, feature = "test"), not(target_arch = "wasm32")))]
+// Test dependencies
+#[cfg(all(test, not(target_arch = "wasm32")))]
 use mockall::predicate::*;
-#[cfg(all(any(test, feature = "test"), not(target_arch = "wasm32")))]
+#[cfg(all(test, not(target_arch = "wasm32")))]
 use mockall::*;
 
-use stake::{InitiateUnstakingError, Stake, StakeActionError, StakingError, Trait as StakeTrait};
-
 use codec::Codec;
-
-use runtime_primitives::traits::Zero;
-use runtime_primitives::traits::{MaybeSerialize, Member, One, SimpleArithmetic};
-
-use srml_support::traits::Currency;
-use srml_support::{decl_module, decl_storage, ensure, Parameter};
-
+use frame_support::storage::IterableStorageMap;
+use frame_support::traits::{Currency, Imbalance};
+use frame_support::{decl_module, decl_storage, ensure, Parameter};
+use rstd::cell::RefCell;
 use rstd::collections::btree_map::BTreeMap;
 use rstd::collections::btree_set::BTreeSet;
 use rstd::iter::Iterator;
-use rstd::prelude::*;
-
-use rstd::cell::RefCell;
 use rstd::rc::Rc;
+use sp_arithmetic::traits::{BaseArithmetic, One, Zero};
+use sp_runtime::traits::{MaybeSerialize, Member};
 
-use crate::sr_api_hidden_includes_decl_storage::hidden_include::traits::Imbalance;
+use stake::{InitiateUnstakingError, Stake, StakeActionError, StakingError, Trait as StakeTrait};
 
 mod hiring;
 #[macro_use]
@@ -57,7 +51,7 @@ pub trait Trait: system::Trait + stake::Trait + Sized {
     /// OpeningId type
     type OpeningId: Parameter
         + Member
-        + SimpleArithmetic
+        + BaseArithmetic
         + Codec
         + Default
         + Copy
@@ -67,7 +61,7 @@ pub trait Trait: system::Trait + stake::Trait + Sized {
     /// ApplicationId type
     type ApplicationId: Parameter
         + Member
-        + SimpleArithmetic
+        + BaseArithmetic
         + Codec
         + Default
         + Copy
@@ -83,21 +77,23 @@ pub trait Trait: system::Trait + stake::Trait + Sized {
 
 decl_storage! {
     trait Store for Module<T: Trait> as Hiring {
-
         /// Openings.
-        pub OpeningById get(opening_by_id): linked_map T::OpeningId => Opening<BalanceOf<T>, T::BlockNumber, T::ApplicationId>;
+        pub OpeningById get(fn opening_by_id): map hasher(blake2_128_concat)
+            T::OpeningId => Opening<BalanceOf<T>, T::BlockNumber, T::ApplicationId>;
 
         /// Identifier for next opening to be added.
-        pub NextOpeningId get(next_opening_id): T::OpeningId;
+        pub NextOpeningId get(fn next_opening_id): T::OpeningId;
 
         /// Applications
-        pub ApplicationById get(application_by_id): linked_map T::ApplicationId => Application<T::OpeningId, T::BlockNumber, T::StakeId>;
+        pub ApplicationById get(fn application_by_id): map hasher(blake2_128_concat)
+            T::ApplicationId => Application<T::OpeningId, T::BlockNumber, T::StakeId>;
 
         /// Identifier for next application to be added.
-        pub NextApplicationId get(next_application_id): T::ApplicationId;
+        pub NextApplicationId get(fn next_application_id): T::ApplicationId;
 
         /// Internal purpose of given stake, i.e. fro what application, and whether for the role or for the application.
-        pub ApplicationIdByStakingId get(stake_purpose_by_staking_id): linked_map T::StakeId => T::ApplicationId;
+        pub ApplicationIdByStakingId get(fn stake_purpose_by_staking_id): map hasher(blake2_128_concat)
+            T::StakeId => T::ApplicationId;
     }
 }
 
@@ -769,14 +765,14 @@ impl<T: Trait> Module<T> {
     /// The stake, with the given id, was unstaked.
     pub fn unstaked(stake_id: T::StakeId) -> UnstakedResult {
         // Ignore unstaked
-        if !<ApplicationIdByStakingId<T>>::exists(stake_id) {
+        if !<ApplicationIdByStakingId<T>>::contains_key(stake_id) {
             return UnstakedResult::StakeIdNonExistent;
         }
 
         // Get application
         let application_id = <ApplicationIdByStakingId<T>>::get(stake_id);
 
-        assert!(<ApplicationById<T>>::exists(application_id));
+        assert!(<ApplicationById<T>>::contains_key(application_id));
 
         let application = <ApplicationById<T>>::get(application_id);
 
@@ -1005,7 +1001,7 @@ impl<T: Trait> Module<T> {
             Opening<BalanceOf<T>, T::BlockNumber, T::ApplicationId>,
         ),
     > {
-        <OpeningById<T>>::enumerate().filter_map(move |(opening_id, opening)| {
+        <OpeningById<T>>::iter().filter_map(move |(opening_id, opening)| {
             if let hiring::OpeningStage::WaitingToBegin { begins_at_block } = opening.stage {
                 if begins_at_block == now {
                     Some((opening_id, opening))
@@ -1028,7 +1024,7 @@ impl<T: Trait> Module<T> {
             (BTreeSet<T::ApplicationId>, T::BlockNumber, T::BlockNumber),
         ),
     > {
-        <OpeningById<T>>::enumerate().filter_map(move |(opening_id, opening)| {
+        <OpeningById<T>>::iter().filter_map(move |(opening_id, opening)| {
             if let hiring::OpeningStage::Active {
                 ref stage,
                 ref applications_added,
@@ -1282,7 +1278,7 @@ impl<T: Trait> Module<T> {
 
         // MUST never already be a key for new stake, false means code is broken.
         // But should we do panic in runtime? Is there safer way?
-        assert!(!<ApplicationIdByStakingId<T>>::exists(new_stake_id));
+        assert!(!<ApplicationIdByStakingId<T>>::contains_key(new_stake_id));
 
         <ApplicationIdByStakingId<T>>::insert(new_stake_id, application_id);
 
@@ -1476,10 +1472,7 @@ impl<T: Trait> Module<T> {
  */
 
 /// Defines stake module interface
-#[cfg_attr(
-    all(any(test, feature = "test"), not(target_arch = "wasm32")),
-    automock
-)]
+#[cfg_attr(all(test, not(target_arch = "wasm32")), automock)]
 pub trait StakeHandler<T: StakeTrait> {
     /// Adds a new Stake which is NotStaked, created at given block, into stakes map.
     fn create_stake(&self) -> T::StakeId;
@@ -1536,7 +1529,7 @@ impl<T: Trait> StakeHandler<T> for HiringStakeHandler {
     }
 
     fn stake_exists(&self, stake_id: T::StakeId) -> bool {
-        <stake::Stakes<T>>::exists(stake_id)
+        <stake::Stakes<T>>::contains_key(stake_id)
     }
 
     fn get_stake(&self, stake_id: T::StakeId) -> Stake<T::BlockNumber, BalanceOf<T>, T::SlashId> {
diff --git a/runtime-modules/hiring/src/macroes.rs b/runtime-modules/hiring/src/macroes.rs
index 4d4c9726d0..a2cde79fe4 100644
--- a/runtime-modules/hiring/src/macroes.rs
+++ b/runtime-modules/hiring/src/macroes.rs
@@ -10,7 +10,7 @@ macro_rules! ensure_eq {
 /// Ensure that a storage map, with a given name, has mapping for the given key value.
 macro_rules! ensure_map_key {
     ($map_variable_name:ident , $runtime_trait:tt, $key:expr, $error:expr) => {{
-        if <$map_variable_name<$runtime_trait>>::exists($key) {
+        if <$map_variable_name<$runtime_trait>>::contains_key($key) {
             let value = <$map_variable_name<$runtime_trait>>::get($key);
 
             Ok(value)
diff --git a/runtime-modules/hiring/src/mock.rs b/runtime-modules/hiring/src/mock.rs
index 27d7f3bfe4..7f260bda9a 100644
--- a/runtime-modules/hiring/src/mock.rs
+++ b/runtime-modules/hiring/src/mock.rs
@@ -1,23 +1,21 @@
 #![cfg(test)]
 
-use primitives::H256;
-use runtime_primitives::{
+use frame_support::{impl_outer_origin, parameter_types};
+use rstd::cell::{Cell, RefCell};
+use rstd::rc::Rc;
+use sp_core::H256;
+use sp_runtime::{
     testing::Header,
     traits::{BlakeTwo256, IdentityLookup},
     Perbill,
 };
-use srml_support::{impl_outer_origin, parameter_types};
+use std::panic;
 
 use crate::hiring::ApplicationDeactivationCause;
 use crate::{Module, Trait};
 use balances;
 use stake;
 
-use std::cell::Cell;
-use std::cell::RefCell;
-use std::panic;
-use std::rc::Rc;
-
 impl_outer_origin! {
     pub enum Origin for Test {}
 }
@@ -27,7 +25,6 @@ parameter_types! {
     pub const MaximumBlockWeight: u32 = 1024;
     pub const MaximumBlockLength: u32 = 2 * 1024;
     pub const AvailableBlockRatio: Perbill = Perbill::one();
-    pub const MinimumPeriod: u64 = 5;
 }
 
 // Workaround for https://github.com/rust-lang/rust/issues/26925 . Remove when sorted.
@@ -35,10 +32,11 @@ parameter_types! {
 pub struct Test;
 
 impl system::Trait for Test {
+    type BaseCallFilter = ();
     type Origin = Origin;
+    type Call = ();
     type Index = u64;
     type BlockNumber = u64;
-    type Call = ();
     type Hash = H256;
     type Hashing = BlakeTwo256;
     type AccountId = u64;
@@ -47,44 +45,36 @@ impl system::Trait for Test {
     type Event = ();
     type BlockHashCount = BlockHashCount;
     type MaximumBlockWeight = MaximumBlockWeight;
+    type DbWeight = ();
+    type BlockExecutionWeight = ();
+    type ExtrinsicBaseWeight = ();
+    type MaximumExtrinsicWeight = ();
     type MaximumBlockLength = MaximumBlockLength;
     type AvailableBlockRatio = AvailableBlockRatio;
     type Version = ();
+    type ModuleToIndex = ();
+    type AccountData = balances::AccountData<u64>;
+    type OnNewAccount = ();
+    type OnKilledAccount = ();
 }
 
 parameter_types! {
     pub const ExistentialDeposit: u32 = 100;
-    pub const TransferFee: u32 = 0;
-    pub const CreationFee: u32 = 0;
-    pub const TransactionBaseFee: u32 = 1;
-    pub const TransactionByteFee: u32 = 0;
     pub const StakePoolId: [u8; 8] = *b"joystake";
 }
 
 impl balances::Trait for Test {
-    /// The type for recording an account's balance.
     type Balance = u64;
-    /// What to do if an account's free balance gets zeroed.
-    type OnFreeBalanceZero = ();
-    /// What to do if a new account is created.
-    type OnNewAccount = ();
-    /// The ubiquitous event type.
-    type Event = ();
-
     type DustRemoval = ();
-    type TransferPayment = ();
+    type Event = ();
     type ExistentialDeposit = ExistentialDeposit;
-    type TransferFee = TransferFee;
-    type CreationFee = CreationFee;
+    type AccountStore = System;
 }
 
 impl Trait for Test {
     type OpeningId = u64;
-
     type ApplicationId = u64;
-
     type ApplicationDeactivatedHandler = TestApplicationDeactivatedHandler;
-
     type StakeHandlerProvider = TestStakeHandlerProvider;
 }
 
@@ -148,7 +138,7 @@ pub(crate) fn test_expectation_and_clear_mock() {
     set_stake_handler_impl(Rc::new(RefCell::new(crate::HiringStakeHandler {})));
 }
 
-pub fn build_test_externalities() -> runtime_io::TestExternalities {
+pub fn build_test_externalities() -> sp_io::TestExternalities {
     let t = system::GenesisConfig::default()
         .build_storage::<Test>()
         .unwrap();
@@ -201,3 +191,6 @@ impl TestApplicationDeactivatedHandler {
         );
     }
 }
+
+// Test fixtures starting block.
+pub(crate) static FIRST_BLOCK_HEIGHT: <Test as system::Trait>::BlockNumber = 0;
diff --git a/runtime-modules/hiring/src/test/public_api/add_application.rs b/runtime-modules/hiring/src/test/public_api/add_application.rs
index 6708c90ac9..1df06bd3b3 100644
--- a/runtime-modules/hiring/src/test/public_api/add_application.rs
+++ b/runtime-modules/hiring/src/test/public_api/add_application.rs
@@ -66,12 +66,16 @@ impl AddApplicationFixture {
             // Check next application id has been updated
             assert_eq!(Hiring::next_application_id(), expected_application_id + 1);
             // Check application exists
-            assert!(<ApplicationById<Test>>::exists(expected_application_id));
+            assert!(<ApplicationById<Test>>::contains_key(
+                expected_application_id
+            ));
         } else {
             // Check next application id has not been updated
             assert_eq!(Hiring::next_application_id(), expected_application_id);
             // Check application does not exist
-            assert!(!<ApplicationById<Test>>::exists(expected_application_id));
+            assert!(!<ApplicationById<Test>>::contains_key(
+                expected_application_id
+            ));
         };
 
         //Check application content
@@ -115,7 +119,7 @@ impl AddApplicationFixture {
             let expected_application = Application {
                 opening_id: self.opening_id,
                 application_index_in_opening: expected_application_index_in_opening,
-                add_to_opening_in_block: 1,
+                add_to_opening_in_block: 0,
                 active_role_staking_id: expected_active_role_staking_id,
                 active_application_staking_id: expected_active_application_staking_id,
                 stage: ApplicationStage::Active,
@@ -166,7 +170,7 @@ impl AddApplicationFixture {
         let expected_opening = Opening {
             stage: OpeningStage::Active {
                 stage: ActiveOpeningStage::AcceptingApplications {
-                    started_accepting_applicants_at_block: 1,
+                    started_accepting_applicants_at_block: FIRST_BLOCK_HEIGHT,
                 },
                 applications_added: expected_added_apps_in_opening,
                 active_application_count: expected_active_application_count,
@@ -289,7 +293,7 @@ fn add_application_succeeds_with_created_application_stake() {
 
         let stake = Hiring::staking().get_stake(application_stake_id);
         let expected_stake = stake::Stake {
-            created: 1,
+            created: FIRST_BLOCK_HEIGHT,
             staking_status: stake::StakingStatus::Staked(stake::StakedState {
                 staked_amount: 100,
                 staked_status: stake::StakedStatus::Normal,
diff --git a/runtime-modules/hiring/src/test/public_api/add_opening.rs b/runtime-modules/hiring/src/test/public_api/add_opening.rs
index bbbf69df0b..e3cbf2d01f 100644
--- a/runtime-modules/hiring/src/test/public_api/add_opening.rs
+++ b/runtime-modules/hiring/src/test/public_api/add_opening.rs
@@ -1,4 +1,4 @@
-use crate::mock::{build_test_externalities, Hiring, Test};
+use crate::mock::{build_test_externalities, Hiring, Test, FIRST_BLOCK_HEIGHT};
 use crate::test::{BlockNumber, OpeningId};
 use crate::StakingAmountLimitMode::Exact;
 use crate::*;
@@ -8,7 +8,6 @@ use crate::{
 };
 use rstd::collections::btree_set::BTreeSet;
 
-static FIRST_BLOCK_HEIGHT: <Test as system::Trait>::BlockNumber = 1;
 pub static HUMAN_READABLE_TEXT: &[u8] = b"HUMAN_READABLE_TEXT!!!!";
 
 pub struct AddOpeningFixture<Balance> {
@@ -44,12 +43,12 @@ impl AddOpeningFixture<OpeningId> {
             // Check next opening id has been updated
             assert_eq!(Hiring::next_opening_id(), expected_opening_id + 1);
             // Check opening exists
-            assert!(<OpeningById<Test>>::exists(expected_opening_id));
+            assert!(<OpeningById<Test>>::contains_key(expected_opening_id));
         } else {
             // Check next opening id has not been updated
             assert_eq!(Hiring::next_opening_id(), expected_opening_id);
             // Check opening does not exist
-            assert!(!<OpeningById<Test>>::exists(expected_opening_id));
+            assert!(!<OpeningById<Test>>::contains_key(expected_opening_id));
         };
 
         //Check opening content
@@ -75,7 +74,7 @@ impl AddOpeningFixture<OpeningId> {
         };
 
         let expected_opening = Opening {
-            created: FIRST_BLOCK_HEIGHT,
+            created: mock::FIRST_BLOCK_HEIGHT,
             stage: expected_opening_stage,
             max_review_period_length: self.max_review_period_length,
             application_rationing_policy: self.application_rationing_policy.clone(),
diff --git a/runtime-modules/hiring/src/test/public_api/begin_accepting_applications.rs b/runtime-modules/hiring/src/test/public_api/begin_accepting_applications.rs
index a660da8203..ba226fde0f 100644
--- a/runtime-modules/hiring/src/test/public_api/begin_accepting_applications.rs
+++ b/runtime-modules/hiring/src/test/public_api/begin_accepting_applications.rs
@@ -42,10 +42,10 @@ fn begin_accepting_applications_succeeds() {
         let updated_opening = <OpeningById<Test>>::get(opening_id);
 
         let expected_opening_state = Opening {
-            created: 1,
+            created: FIRST_BLOCK_HEIGHT,
             stage: OpeningStage::Active {
                 stage: ActiveOpeningStage::AcceptingApplications {
-                    started_accepting_applicants_at_block: 1,
+                    started_accepting_applicants_at_block: FIRST_BLOCK_HEIGHT,
                 },
                 applications_added: BTreeSet::new(),
                 active_application_count: 0,
diff --git a/runtime-modules/hiring/src/test/public_api/begin_review.rs b/runtime-modules/hiring/src/test/public_api/begin_review.rs
index 25dc74ad0c..5a5e5d9bfc 100644
--- a/runtime-modules/hiring/src/test/public_api/begin_review.rs
+++ b/runtime-modules/hiring/src/test/public_api/begin_review.rs
@@ -46,8 +46,8 @@ fn begin_review_succeeds() {
 
         let expected_opening_state =
             old_opening.clone_with_new_active_opening_stage(ActiveOpeningStage::ReviewPeriod {
-                started_accepting_applicants_at_block: 1,
-                started_review_period_at_block: 1,
+                started_accepting_applicants_at_block: FIRST_BLOCK_HEIGHT,
+                started_review_period_at_block: FIRST_BLOCK_HEIGHT,
             });
 
         assert_eq!(updated_opening, expected_opening_state);
diff --git a/runtime-modules/hiring/src/test/public_api/cancel_opening.rs b/runtime-modules/hiring/src/test/public_api/cancel_opening.rs
index 19f32b9324..04deac8f54 100644
--- a/runtime-modules/hiring/src/test/public_api/cancel_opening.rs
+++ b/runtime-modules/hiring/src/test/public_api/cancel_opening.rs
@@ -96,7 +96,7 @@ impl CancelOpeningFixture {
                         started_accepting_applicants_at_block,
                     } => ActiveOpeningStage::Deactivated {
                         cause: OpeningDeactivationCause::CancelledAcceptingApplications,
-                        deactivated_at_block: 1,
+                        deactivated_at_block: FIRST_BLOCK_HEIGHT,
                         started_accepting_applicants_at_block,
                         started_review_period_at_block: None,
                     },
@@ -105,7 +105,7 @@ impl CancelOpeningFixture {
                         started_review_period_at_block,
                     } => ActiveOpeningStage::Deactivated {
                         cause: OpeningDeactivationCause::CancelledInReviewPeriod,
-                        deactivated_at_block: 1,
+                        deactivated_at_block: FIRST_BLOCK_HEIGHT,
                         started_accepting_applicants_at_block,
                         started_review_period_at_block: Some(started_review_period_at_block),
                     },
diff --git a/runtime-modules/hiring/src/test/public_api/deactivate_application.rs b/runtime-modules/hiring/src/test/public_api/deactivate_application.rs
index effce30ed4..cd23b06693 100644
--- a/runtime-modules/hiring/src/test/public_api/deactivate_application.rs
+++ b/runtime-modules/hiring/src/test/public_api/deactivate_application.rs
@@ -67,7 +67,7 @@ impl DeactivateApplicationFixture {
             {
                 Application {
                     stage: ApplicationStage::Unstaking {
-                        deactivation_initiated: 1,
+                        deactivation_initiated: FIRST_BLOCK_HEIGHT,
                         cause: ApplicationDeactivationCause::External,
                     },
                     ..old_application_state
@@ -75,8 +75,8 @@ impl DeactivateApplicationFixture {
             } else {
                 Application {
                     stage: ApplicationStage::Inactive {
-                        deactivation_initiated: 1,
-                        deactivated: 1,
+                        deactivation_initiated: FIRST_BLOCK_HEIGHT,
+                        deactivated: FIRST_BLOCK_HEIGHT,
                         cause: ApplicationDeactivationCause::External,
                     },
                     ..old_application_state
@@ -98,7 +98,7 @@ impl DeactivateApplicationFixture {
         // invalid opening stages are not supported
 
         // check for opening existence
-        if !<OpeningById<Test>>::exists(opening_id) {
+        if !<OpeningById<Test>>::contains_key(opening_id) {
             return;
         }
 
@@ -131,7 +131,7 @@ impl DeactivateApplicationFixture {
                 let expected_opening = Opening {
                     stage: OpeningStage::Active {
                         stage: ActiveOpeningStage::AcceptingApplications {
-                            started_accepting_applicants_at_block: 1,
+                            started_accepting_applicants_at_block: FIRST_BLOCK_HEIGHT,
                         },
                         applications_added,
                         active_application_count: expected_active_application_count,
diff --git a/runtime-modules/hiring/src/test/public_api/ensure_can_add_application.rs b/runtime-modules/hiring/src/test/public_api/ensure_can_add_application.rs
index b2413ee6a2..78ccfba5b1 100644
--- a/runtime-modules/hiring/src/test/public_api/ensure_can_add_application.rs
+++ b/runtime-modules/hiring/src/test/public_api/ensure_can_add_application.rs
@@ -239,10 +239,10 @@ fn ensure_can_add_application_succeeds() {
             ensure_can_add_application_result,
             Ok(DestructuredApplicationCanBeAddedEvaluation {
                 opening: Opening {
-                    created: 1,
+                    created: FIRST_BLOCK_HEIGHT,
                     stage: hiring::OpeningStage::Active {
                         stage: hiring::ActiveOpeningStage::AcceptingApplications {
-                            started_accepting_applicants_at_block: 1
+                            started_accepting_applicants_at_block: FIRST_BLOCK_HEIGHT
                         },
                         applications_added: BTreeSet::new(),
                         active_application_count: 0,
@@ -266,7 +266,7 @@ fn ensure_can_add_application_succeeds() {
                     human_readable_text: HUMAN_READABLE_TEXT.to_vec()
                 },
                 active_stage: hiring::ActiveOpeningStage::AcceptingApplications {
-                    started_accepting_applicants_at_block: 1
+                    started_accepting_applicants_at_block: FIRST_BLOCK_HEIGHT
                 },
                 applications_added: BTreeSet::new(),
                 active_application_count: 0,
diff --git a/runtime-modules/hiring/src/test/public_api/fill_opening.rs b/runtime-modules/hiring/src/test/public_api/fill_opening.rs
index 562115b00f..f2cc62427d 100644
--- a/runtime-modules/hiring/src/test/public_api/fill_opening.rs
+++ b/runtime-modules/hiring/src/test/public_api/fill_opening.rs
@@ -89,9 +89,9 @@ impl FillOpeningFixture {
                 // compose expected stage
                 let expected_active_stage = ActiveOpeningStage::Deactivated {
                     cause: OpeningDeactivationCause::Filled,
-                    deactivated_at_block: 1,
-                    started_accepting_applicants_at_block: 1,
-                    started_review_period_at_block: Some(1),
+                    deactivated_at_block: FIRST_BLOCK_HEIGHT,
+                    started_accepting_applicants_at_block: FIRST_BLOCK_HEIGHT,
+                    started_review_period_at_block: Some(FIRST_BLOCK_HEIGHT),
                 };
 
                 // calculate application counters
diff --git a/runtime-modules/hiring/src/test/public_api/on_finalize.rs b/runtime-modules/hiring/src/test/public_api/on_finalize.rs
index 379fd42c09..8b0d4aadcc 100644
--- a/runtime-modules/hiring/src/test/public_api/on_finalize.rs
+++ b/runtime-modules/hiring/src/test/public_api/on_finalize.rs
@@ -1,7 +1,7 @@
 use crate::mock::*;
 use crate::test::*;
 
-use runtime_primitives::traits::{OnFinalize, OnInitialize};
+use frame_support::traits::{OnFinalize, OnInitialize};
 
 // Recommendation from Parity on testing on_finalize
 // https://substrate.dev/docs/en/next/development/module/tests
diff --git a/runtime-modules/hiring/src/test/public_api/unstaked.rs b/runtime-modules/hiring/src/test/public_api/unstaked.rs
index e6f4343d08..8afddf85a9 100644
--- a/runtime-modules/hiring/src/test/public_api/unstaked.rs
+++ b/runtime-modules/hiring/src/test/public_api/unstaked.rs
@@ -62,7 +62,7 @@ impl UnstakedFixture {
                 {
                     let expected_application_stage = ApplicationStage::Inactive {
                         deactivation_initiated,
-                        deactivated: 1,
+                        deactivated: FIRST_BLOCK_HEIGHT,
                         cause,
                     };
 
diff --git a/runtime-modules/hiring/src/test/smoke.rs b/runtime-modules/hiring/src/test/smoke.rs
index 6ea087a94d..c8c5ebfe19 100644
--- a/runtime-modules/hiring/src/test/smoke.rs
+++ b/runtime-modules/hiring/src/test/smoke.rs
@@ -1,8 +1,6 @@
 use super::*;
 use crate::mock::*;
 
-static FIRST_BLOCK_HEIGHT: <Test as system::Trait>::BlockNumber = 1;
-
 use rstd::collections::btree_set::BTreeSet;
 
 /**
@@ -52,7 +50,7 @@ fn full_hiring_workflow_successful_path() {
         assert_eq!(Hiring::next_opening_id(), expected_opening_id + 1);
 
         // Check that our opening actually was added
-        assert!(<OpeningById<Test>>::exists(expected_opening_id));
+        assert!(<OpeningById<Test>>::contains_key(expected_opening_id));
 
         let found_opening = Hiring::opening_by_id(expected_opening_id);
 
@@ -90,10 +88,10 @@ fn full_hiring_workflow_successful_path() {
         let destructured_app_data = ensure_can_add_application_result.unwrap();
         let expected = DestructuredApplicationCanBeAddedEvaluation {
             opening: Opening {
-                created: 1,
+                created: FIRST_BLOCK_HEIGHT,
                 stage: OpeningStage::Active {
                     stage: ActiveOpeningStage::AcceptingApplications {
-                        started_accepting_applicants_at_block: 1,
+                        started_accepting_applicants_at_block: FIRST_BLOCK_HEIGHT,
                     },
                     applications_added: BTreeSet::new(),
                     active_application_count: 0,
@@ -107,7 +105,7 @@ fn full_hiring_workflow_successful_path() {
                 human_readable_text: human_readable_text.clone(),
             },
             active_stage: ActiveOpeningStage::AcceptingApplications {
-                started_accepting_applicants_at_block: 1,
+                started_accepting_applicants_at_block: FIRST_BLOCK_HEIGHT,
             },
             applications_added: BTreeSet::new(),
             active_application_count: 0,
@@ -136,7 +134,7 @@ fn full_hiring_workflow_successful_path() {
         let new_application_id = app_added.application_id_added;
 
         // Check that our application actually was added
-        assert!(<ApplicationById<Test>>::exists(new_application_id));
+        assert!(<ApplicationById<Test>>::contains_key(new_application_id));
 
         let new_application = Hiring::application_by_id(new_application_id);
 
@@ -146,7 +144,7 @@ fn full_hiring_workflow_successful_path() {
             Application {
                 opening_id: 0,
                 application_index_in_opening: 0,
-                add_to_opening_in_block: 1,
+                add_to_opening_in_block: FIRST_BLOCK_HEIGHT,
                 active_role_staking_id: None,
                 active_application_staking_id: None,
                 stage: ApplicationStage::Active,
@@ -169,11 +167,11 @@ fn full_hiring_workflow_successful_path() {
         assert_eq!(
             updated_opening_after_begin_review,
             Opening {
-                created: 1,
+                created: FIRST_BLOCK_HEIGHT,
                 stage: OpeningStage::Active {
                     stage: ActiveOpeningStage::ReviewPeriod {
-                        started_accepting_applicants_at_block: 1,
-                        started_review_period_at_block: 1
+                        started_accepting_applicants_at_block: FIRST_BLOCK_HEIGHT,
+                        started_review_period_at_block: FIRST_BLOCK_HEIGHT
                     },
                     applications_added: expected_added_apps_in_opening.clone(),
                     active_application_count: 1,
@@ -204,13 +202,13 @@ fn full_hiring_workflow_successful_path() {
         assert_eq!(
             updated_opening_fill_opening,
             Opening {
-                created: 1,
+                created: FIRST_BLOCK_HEIGHT,
                 stage: OpeningStage::Active {
                     stage: ActiveOpeningStage::Deactivated {
                         cause: OpeningDeactivationCause::Filled,
-                        deactivated_at_block: 1,
-                        started_accepting_applicants_at_block: 1,
-                        started_review_period_at_block: Some(1)
+                        deactivated_at_block: FIRST_BLOCK_HEIGHT,
+                        started_accepting_applicants_at_block: FIRST_BLOCK_HEIGHT,
+                        started_review_period_at_block: Some(FIRST_BLOCK_HEIGHT)
                     },
                     applications_added: expected_added_apps_in_opening,
                     active_application_count: 0,
@@ -234,12 +232,12 @@ fn full_hiring_workflow_successful_path() {
             Application {
                 opening_id: 0,
                 application_index_in_opening: 0,
-                add_to_opening_in_block: 1,
+                add_to_opening_in_block: FIRST_BLOCK_HEIGHT,
                 active_role_staking_id: None,
                 active_application_staking_id: None,
                 stage: ApplicationStage::Inactive {
-                    deactivation_initiated: 1,
-                    deactivated: 1,
+                    deactivation_initiated: FIRST_BLOCK_HEIGHT,
+                    deactivated: FIRST_BLOCK_HEIGHT,
                     cause: ApplicationDeactivationCause::Hired
                 },
                 human_readable_text: application_readable_text.clone()
diff --git a/runtime-modules/hiring/src/test/staking_module/try_to_initiate_application_deactivation.rs b/runtime-modules/hiring/src/test/staking_module/try_to_initiate_application_deactivation.rs
index c7069d3106..b2cfc96b1a 100644
--- a/runtime-modules/hiring/src/test/staking_module/try_to_initiate_application_deactivation.rs
+++ b/runtime-modules/hiring/src/test/staking_module/try_to_initiate_application_deactivation.rs
@@ -56,15 +56,15 @@ impl<'a> TryToInitiateApplicationDeactivationFixture<'a> {
         let expected_application_state = match result {
             ApplicationDeactivationInitiationResult::Deactivated => Application {
                 stage: ApplicationStage::Inactive {
-                    deactivation_initiated: 1,
-                    deactivated: 1,
+                    deactivation_initiated: FIRST_BLOCK_HEIGHT,
+                    deactivated: FIRST_BLOCK_HEIGHT,
                     cause: self.cause,
                 },
                 ..old_application_state
             },
             ApplicationDeactivationInitiationResult::Unstaking => Application {
                 stage: ApplicationStage::Unstaking {
-                    deactivation_initiated: 1,
+                    deactivation_initiated: FIRST_BLOCK_HEIGHT,
                     cause: self.cause,
                 },
                 ..old_application_state
@@ -84,7 +84,7 @@ impl<'a> TryToInitiateApplicationDeactivationFixture<'a> {
         // invalid opening stages are not supported
 
         // check for opening existence
-        if !<OpeningById<Test>>::exists(opening_id) {
+        if !<OpeningById<Test>>::contains_key(opening_id) {
             return;
         }
 
@@ -118,7 +118,7 @@ impl<'a> TryToInitiateApplicationDeactivationFixture<'a> {
                 let expected_opening = Opening {
                     stage: OpeningStage::Active {
                         stage: ActiveOpeningStage::AcceptingApplications {
-                            started_accepting_applicants_at_block: 1,
+                            started_accepting_applicants_at_block: FIRST_BLOCK_HEIGHT,
                         },
                         applications_added,
                         active_application_count: expected_active_application_count,
diff --git a/runtime-modules/membership/Cargo.toml b/runtime-modules/membership/Cargo.toml
index b67c46eef5..f5521592ed 100644
--- a/runtime-modules/membership/Cargo.toml
+++ b/runtime-modules/membership/Cargo.toml
@@ -1,83 +1,33 @@
 [package]
-name = 'substrate-membership-module'
-version = '1.1.0'
+name = 'pallet-membership'
+version = '3.0.0'
 authors = ['Joystream contributors']
 edition = '2018'
 
+[dependencies]
+serde = { version = "1.0.101", optional = true, features = ["derive"] }
+codec = { package = 'parity-scale-codec', version = '1.3.1', default-features = false, features = ['derive'] }
+frame-support = { package = 'frame-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+system = { package = 'frame-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-arithmetic = { package = 'sp-arithmetic', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-runtime = { package = 'sp-runtime', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+timestamp = { package = 'pallet-timestamp', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+common = { package = 'pallet-common', default-features = false, path = '../common'}
+
+[dev-dependencies]
+sp-io = { package = 'sp-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-core = { package = 'sp-core', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+balances = { package = 'pallet-balances', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+
 [features]
 default = ['std']
 std = [
-	'sr-primitives/std',
-	'srml-support/std',
-	'system/std',
-	'rstd/std',
-	'codec/std',
 	'serde',
+	'codec/std',
+	'frame-support/std',
+	'system/std',
+	'sp-arithmetic/std',
+	'sp-runtime/std',
 	'timestamp/std',
-	'primitives/std',
 	'common/std',
-]
-
-[dependencies.sr-primitives]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'sr-primitives'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.srml-support]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-support'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.system]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-system'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.rstd]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'sr-std'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.codec]
-default-features = false
-features = ['derive']
-package = 'parity-scale-codec'
-version = '1.0.0'
-
-[dependencies.serde]
-features = ['derive']
-optional = true
-version = '1.0.101'
-
-[dependencies.timestamp]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-timestamp'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.primitives]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'substrate-primitives'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.common]
-default_features = false
-package = 'substrate-common-module'
-path = '../common'
-
-[dev-dependencies.runtime-io]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'sr-io'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dev-dependencies.balances]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-balances'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
\ No newline at end of file
+]
\ No newline at end of file
diff --git a/runtime-modules/membership/src/genesis.rs b/runtime-modules/membership/src/genesis.rs
index b871777eb9..1856dbf8c5 100644
--- a/runtime-modules/membership/src/genesis.rs
+++ b/runtime-modules/membership/src/genesis.rs
@@ -1,7 +1,6 @@
 #![cfg(test)]
 
 use common::currency::BalanceOf;
-use rstd::prelude::*;
 
 use crate::{GenesisConfig, Trait};
 
diff --git a/runtime-modules/membership/src/lib.rs b/runtime-modules/membership/src/lib.rs
index 5dc816f941..7e9e96ccdf 100644
--- a/runtime-modules/membership/src/lib.rs
+++ b/runtime-modules/membership/src/lib.rs
@@ -10,21 +10,24 @@ pub(crate) mod mock;
 mod tests;
 
 use codec::{Codec, Decode, Encode};
-use rstd::borrow::ToOwned;
-use rstd::prelude::*;
-use sr_primitives::traits::{MaybeSerialize, Member, One, SimpleArithmetic};
-use srml_support::traits::Currency;
-use srml_support::{decl_event, decl_module, decl_storage, dispatch, ensure, Parameter};
+use frame_support::traits::Currency;
+use frame_support::{decl_event, decl_module, decl_storage, ensure, Parameter};
+use sp_arithmetic::traits::{BaseArithmetic, One};
+use sp_runtime::traits::{MaybeSerialize, Member};
 use system::{self, ensure_root, ensure_signed};
 
 use common::currency::{BalanceOf, GovernanceCurrency};
 
+//TODO: Convert errors to the Substrate decl_error! macro.
+/// Result with string error message. This exists for backward compatibility purpose.
+pub type DispatchResult = Result<(), &'static str>;
+
 pub trait Trait: system::Trait + GovernanceCurrency + timestamp::Trait {
     type Event: From<Event<Self>> + Into<<Self as system::Trait>::Event>;
 
     type MemberId: Parameter
         + Member
-        + SimpleArithmetic
+        + BaseArithmetic
         + Codec
         + Default
         + Copy
@@ -33,7 +36,7 @@ pub trait Trait: system::Trait + GovernanceCurrency + timestamp::Trait {
 
     type PaidTermId: Parameter
         + Member
-        + SimpleArithmetic
+        + BaseArithmetic
         + Codec
         + Default
         + Copy
@@ -42,7 +45,7 @@ pub trait Trait: system::Trait + GovernanceCurrency + timestamp::Trait {
 
     type SubscriptionId: Parameter
         + Member
-        + SimpleArithmetic
+        + BaseArithmetic
         + Codec
         + Default
         + Copy
@@ -52,7 +55,7 @@ pub trait Trait: system::Trait + GovernanceCurrency + timestamp::Trait {
     /// Describes the common type for the working group members (workers).
     type ActorId: Parameter
         + Member
-        + SimpleArithmetic
+        + BaseArithmetic
         + Codec
         + Default
         + Copy
@@ -61,10 +64,10 @@ pub trait Trait: system::Trait + GovernanceCurrency + timestamp::Trait {
         + Ord;
 }
 
-const FIRST_PAID_TERMS_ID: u32 = 1;
+const FIRST_PAID_TERMS_ID: u8 = 1;
 
 // Default paid membership terms
-pub const DEFAULT_PAID_TERM_ID: u32 = 0;
+pub const DEFAULT_PAID_TERM_ID: u8 = 0;
 
 // Default user info constraints
 const DEFAULT_MIN_HANDLE_LENGTH: u32 = 5;
@@ -154,27 +157,32 @@ decl_storage! {
     trait Store for Module<T: Trait> as Membership {
         /// MemberId to assign to next member that is added to the registry, and is also the
         /// total number of members created. MemberIds start at Zero.
-        pub NextMemberId get(members_created) : T::MemberId;
+        pub NextMemberId get(fn members_created) : T::MemberId;
 
         /// Mapping of member's id to their membership profile
-        pub MembershipById get(membership) : map T::MemberId => Membership<T>;
+        pub MembershipById get(fn membership) : map hasher(blake2_128_concat)
+            T::MemberId => Membership<T>;
 
         /// Mapping of a root account id to vector of member ids it controls.
-        pub(crate) MemberIdsByRootAccountId : map T::AccountId => Vec<T::MemberId>;
+        pub(crate) MemberIdsByRootAccountId : map hasher(blake2_128_concat)
+            T::AccountId => Vec<T::MemberId>;
 
         /// Mapping of a controller account id to vector of member ids it controls
-        pub(crate) MemberIdsByControllerAccountId : map T::AccountId => Vec<T::MemberId>;
+        pub(crate) MemberIdsByControllerAccountId : map hasher(blake2_128_concat)
+            T::AccountId => Vec<T::MemberId>;
 
         /// Registered unique handles and their mapping to their owner
-        pub MemberIdByHandle get(handles) : map Vec<u8> => T::MemberId;
+        pub MemberIdByHandle get(fn handles) : map hasher(blake2_128_concat)
+            Vec<u8> => T::MemberId;
 
         /// Next paid membership terms id
-        pub NextPaidMembershipTermsId get(next_paid_membership_terms_id) : T::PaidTermId = T::PaidTermId::from(FIRST_PAID_TERMS_ID);
+        pub NextPaidMembershipTermsId get(fn next_paid_membership_terms_id) :
+            T::PaidTermId = T::PaidTermId::from(FIRST_PAID_TERMS_ID);
 
         /// Paid membership terms record
         // Remember to add _genesis_phantom_data: std::marker::PhantomData{} to membership
         // genesis config if not providing config() or extra_genesis
-        pub PaidMembershipTermsById get(paid_membership_terms_by_id) build(|config: &GenesisConfig<T>| {
+        pub PaidMembershipTermsById get(fn paid_membership_terms_by_id) build(|config: &GenesisConfig<T>| {
             // This method only gets called when initializing storage, and is
             // compiled as native code. (Will be called when building `raw` chainspec)
             // So it can't be relied upon to initialize storage for runtimes updates.
@@ -184,22 +192,23 @@ decl_storage! {
                 text: Vec::default(),
             };
             vec![(T::PaidTermId::from(DEFAULT_PAID_TERM_ID), terms)]
-        }) : map T::PaidTermId => PaidMembershipTerms<BalanceOf<T>>;
+        }) : map hasher(blake2_128_concat) T::PaidTermId => PaidMembershipTerms<BalanceOf<T>>;
 
         /// Active Paid membership terms
-        pub ActivePaidMembershipTerms get(active_paid_membership_terms) : Vec<T::PaidTermId> = vec![T::PaidTermId::from(DEFAULT_PAID_TERM_ID)];
+        pub ActivePaidMembershipTerms get(fn active_paid_membership_terms) :
+            Vec<T::PaidTermId> = vec![T::PaidTermId::from(DEFAULT_PAID_TERM_ID)];
 
         /// Is the platform is accepting new members or not
-        pub NewMembershipsAllowed get(new_memberships_allowed) : bool = true;
+        pub NewMembershipsAllowed get(fn new_memberships_allowed) : bool = true;
 
-        pub ScreeningAuthority get(screening_authority) : T::AccountId;
+        pub ScreeningAuthority get(fn screening_authority) : T::AccountId;
 
         // User Input Validation parameters - do these really need to be state variables
         // I don't see a need to adjust these in future?
-        pub MinHandleLength get(min_handle_length) : u32 = DEFAULT_MIN_HANDLE_LENGTH;
-        pub MaxHandleLength get(max_handle_length) : u32 = DEFAULT_MAX_HANDLE_LENGTH;
-        pub MaxAvatarUriLength get(max_avatar_uri_length) : u32 = DEFAULT_MAX_AVATAR_URI_LENGTH;
-        pub MaxAboutTextLength get(max_about_text_length) : u32 = DEFAULT_MAX_ABOUT_TEXT_LENGTH;
+        pub MinHandleLength get(fn min_handle_length) : u32 = DEFAULT_MIN_HANDLE_LENGTH;
+        pub MaxHandleLength get(fn max_handle_length) : u32 = DEFAULT_MAX_HANDLE_LENGTH;
+        pub MaxAvatarUriLength get(fn max_avatar_uri_length) : u32 = DEFAULT_MAX_AVATAR_URI_LENGTH;
+        pub MaxAboutTextLength get(fn max_about_text_length) : u32 = DEFAULT_MAX_ABOUT_TEXT_LENGTH;
 
     }
     add_extra_genesis {
@@ -238,6 +247,7 @@ decl_module! {
         fn deposit_event() = default;
 
         /// Non-members can buy membership
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn buy_membership(
             origin,
             paid_terms_id: T::PaidTermId,
@@ -268,6 +278,7 @@ decl_module! {
         }
 
         /// Change member's about text
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn change_member_about_text(origin, member_id: T::MemberId, text: Vec<u8>) {
             let sender = ensure_signed(origin)?;
 
@@ -279,6 +290,7 @@ decl_module! {
         }
 
         /// Change member's avatar
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn change_member_avatar(origin, member_id: T::MemberId, uri: Vec<u8>) {
             let sender = ensure_signed(origin)?;
 
@@ -291,6 +303,7 @@ decl_module! {
 
         /// Change member's handle. Will ensure new handle is unique and old one will be available
         /// for other members to use.
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn change_member_handle(origin, member_id: T::MemberId, handle: Vec<u8>) {
             let sender = ensure_signed(origin)?;
 
@@ -302,6 +315,7 @@ decl_module! {
         }
 
         /// Update member's all or some of handle, avatar and about text.
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn update_membership(
             origin,
             member_id: T::MemberId,
@@ -326,6 +340,7 @@ decl_module! {
             }
         }
 
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn set_controller_account(origin, member_id: T::MemberId, new_controller_account: T::AccountId) {
             let sender = ensure_signed(origin)?;
 
@@ -349,6 +364,7 @@ decl_module! {
             }
         }
 
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn set_root_account(origin, member_id: T::MemberId, new_root_account: T::AccountId) {
             let sender = ensure_signed(origin)?;
 
@@ -371,6 +387,7 @@ decl_module! {
             }
         }
 
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn add_screened_member(
             origin,
             new_member_account: T::AccountId,
@@ -385,7 +402,7 @@ decl_module! {
                 ensure!(sender == Self::screening_authority(), "not screener");
             } else {
                 // no screening authority defined. Cannot accept this request
-                return Err("no screening authority defined");
+                return Err("no screening authority defined".into());
             }
 
             // make sure we are accepting new memberships
@@ -401,6 +418,7 @@ decl_module! {
             Self::deposit_event(RawEvent::MemberRegistered(member_id, new_member_account));
         }
 
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn set_screening_authority(origin, authority: T::AccountId) {
             ensure_root(origin)?;
             <ScreeningAuthority<T>>::put(authority);
@@ -432,7 +450,7 @@ pub enum MemberRootAccountMismatch {
 impl<T: Trait> Module<T> {
     /// Provided that the member_id exists return its membership. Returns error otherwise.
     pub fn ensure_membership(id: T::MemberId) -> Result<Membership<T>, &'static str> {
-        if <MembershipById<T>>::exists(&id) {
+        if <MembershipById<T>>::contains_key(&id) {
             Ok(Self::membership(&id))
         } else {
             Err("member profile not found")
@@ -444,7 +462,7 @@ impl<T: Trait> Module<T> {
         member_id: &T::MemberId,
         account: &T::AccountId,
     ) -> Result<Membership<T>, ControllerAccountForMemberCheckFailed> {
-        if MembershipById::<T>::exists(member_id) {
+        if MembershipById::<T>::contains_key(member_id) {
             let membership = MembershipById::<T>::get(member_id);
 
             if membership.controller_account == *account {
@@ -459,8 +477,8 @@ impl<T: Trait> Module<T> {
 
     /// Returns true if account is either a member's root or controller account
     pub fn is_member_account(who: &T::AccountId) -> bool {
-        <MemberIdsByRootAccountId<T>>::exists(who)
-            || <MemberIdsByControllerAccountId<T>>::exists(who)
+        <MemberIdsByRootAccountId<T>>::contains_key(who)
+            || <MemberIdsByControllerAccountId<T>>::contains_key(who)
     }
 
     fn ensure_active_terms_id(
@@ -472,7 +490,7 @@ impl<T: Trait> Module<T> {
             "paid terms id not active"
         );
 
-        if <PaidMembershipTermsById<T>>::exists(terms_id) {
+        if <PaidMembershipTermsById<T>>::contains_key(terms_id) {
             Ok(Self::paid_membership_terms_by_id(terms_id))
         } else {
             Err("paid membership term id does not exist")
@@ -480,15 +498,15 @@ impl<T: Trait> Module<T> {
     }
 
     #[allow(clippy::ptr_arg)] // cannot change to the "&[u8]" suggested by clippy
-    fn ensure_unique_handle(handle: &Vec<u8>) -> dispatch::Result {
+    fn ensure_unique_handle(handle: &Vec<u8>) -> DispatchResult {
         ensure!(
-            !<MemberIdByHandle<T>>::exists(handle),
+            !<MemberIdByHandle<T>>::contains_key(handle),
             "handle already registered"
         );
         Ok(())
     }
 
-    fn validate_handle(handle: &[u8]) -> dispatch::Result {
+    fn validate_handle(handle: &[u8]) -> DispatchResult {
         ensure!(
             handle.len() >= Self::min_handle_length() as usize,
             "handle too short"
@@ -506,7 +524,7 @@ impl<T: Trait> Module<T> {
         text
     }
 
-    fn validate_avatar(uri: &[u8]) -> dispatch::Result {
+    fn validate_avatar(uri: &[u8]) -> DispatchResult {
         ensure!(
             uri.len() <= Self::max_avatar_uri_length() as usize,
             "avatar uri too long"
@@ -569,7 +587,7 @@ impl<T: Trait> Module<T> {
         new_member_id
     }
 
-    fn _change_member_about_text(id: T::MemberId, text: &[u8]) -> dispatch::Result {
+    fn _change_member_about_text(id: T::MemberId, text: &[u8]) -> DispatchResult {
         let mut membership = Self::ensure_membership(id)?;
         let text = Self::validate_text(text);
         membership.about = text;
@@ -578,7 +596,7 @@ impl<T: Trait> Module<T> {
         Ok(())
     }
 
-    fn _change_member_avatar(id: T::MemberId, uri: &[u8]) -> dispatch::Result {
+    fn _change_member_avatar(id: T::MemberId, uri: &[u8]) -> DispatchResult {
         let mut membership = Self::ensure_membership(id)?;
         Self::validate_avatar(uri)?;
         membership.avatar_uri = uri.to_owned();
@@ -587,7 +605,7 @@ impl<T: Trait> Module<T> {
         Ok(())
     }
 
-    fn _change_member_handle(id: T::MemberId, handle: Vec<u8>) -> dispatch::Result {
+    fn _change_member_handle(id: T::MemberId, handle: Vec<u8>) -> DispatchResult {
         let mut membership = Self::ensure_membership(id)?;
         Self::validate_handle(&handle)?;
         Self::ensure_unique_handle(&handle)?;
diff --git a/runtime-modules/membership/src/mock.rs b/runtime-modules/membership/src/mock.rs
index b6a0186f58..53a86ffdcf 100644
--- a/runtime-modules/membership/src/mock.rs
+++ b/runtime-modules/membership/src/mock.rs
@@ -1,19 +1,18 @@
 #![cfg(test)]
 
 pub use crate::{GenesisConfig, Trait, DEFAULT_PAID_TERM_ID};
-pub use common::currency::GovernanceCurrency;
-pub use srml_support::traits::Currency;
-pub use system;
 
-pub use primitives::{Blake2Hasher, H256};
-pub use sr_primitives::{
-    testing::{Digest, DigestItem, Header, UintAuthorityId},
-    traits::{BlakeTwo256, Convert, IdentityLookup, OnFinalize},
-    weights::Weight,
-    BuildStorage, Perbill,
+pub use frame_support::traits::Currency;
+use frame_support::{impl_outer_origin, parameter_types};
+use sp_core::H256;
+use sp_runtime::{
+    testing::Header,
+    traits::{BlakeTwo256, IdentityLookup},
+    Perbill,
 };
+pub use system;
 
-use srml_support::{impl_outer_origin, parameter_types};
+pub use common::currency::GovernanceCurrency;
 
 impl_outer_origin! {
     pub enum Origin for Test {}
@@ -31,10 +30,11 @@ parameter_types! {
 }
 
 impl system::Trait for Test {
+    type BaseCallFilter = ();
     type Origin = Origin;
+    type Call = ();
     type Index = u64;
     type BlockNumber = u64;
-    type Call = ();
     type Hash = H256;
     type Hashing = BlakeTwo256;
     type AccountId = u64;
@@ -43,9 +43,17 @@ impl system::Trait for Test {
     type Event = ();
     type BlockHashCount = BlockHashCount;
     type MaximumBlockWeight = MaximumBlockWeight;
+    type DbWeight = ();
+    type BlockExecutionWeight = ();
+    type ExtrinsicBaseWeight = ();
+    type MaximumExtrinsicWeight = ();
     type MaximumBlockLength = MaximumBlockLength;
     type AvailableBlockRatio = AvailableBlockRatio;
     type Version = ();
+    type ModuleToIndex = ();
+    type AccountData = balances::AccountData<u64>;
+    type OnNewAccount = ();
+    type OnKilledAccount = ();
 }
 
 impl timestamp::Trait for Test {
@@ -56,27 +64,14 @@ impl timestamp::Trait for Test {
 
 parameter_types! {
     pub const ExistentialDeposit: u32 = 0;
-    pub const TransferFee: u32 = 0;
-    pub const CreationFee: u32 = 0;
-    pub const TransactionBaseFee: u32 = 1;
-    pub const TransactionByteFee: u32 = 0;
 }
 
 impl balances::Trait for Test {
-    /// The type for recording an account's balance.
     type Balance = u64;
-    /// What to do if an account's free balance gets zeroed.
-    type OnFreeBalanceZero = ();
-    /// What to do if a new account is created.
-    type OnNewAccount = ();
-    /// The ubiquitous event type.
-    type Event = ();
-
     type DustRemoval = ();
-    type TransferPayment = ();
+    type Event = ();
     type ExistentialDeposit = ExistentialDeposit;
-    type TransferFee = TransferFee;
-    type CreationFee = CreationFee;
+    type AccountStore = System;
 }
 
 impl GovernanceCurrency for Test {
@@ -106,17 +101,11 @@ impl<T: Trait> Default for TestExternalitiesBuilder<T> {
 }
 
 impl<T: Trait> TestExternalitiesBuilder<T> {
-    /*
-    pub fn set_system_config(mut self, system_config: system::GenesisConfig) -> Self {
-        self.system_config = Some(system_config);
-        self
-    }
-    */
     pub fn set_membership_config(mut self, membership_config: GenesisConfig<T>) -> Self {
         self.membership_config = Some(membership_config);
         self
     }
-    pub fn build(self) -> runtime_io::TestExternalities {
+    pub fn build(self) -> sp_io::TestExternalities {
         // Add system
         let mut t = self
             .system_config
@@ -136,3 +125,4 @@ impl<T: Trait> TestExternalitiesBuilder<T> {
 
 pub type Balances = balances::Module<Test>;
 pub type Members = crate::Module<Test>;
+pub type System = system::Module<Test>;
diff --git a/runtime-modules/membership/src/tests.rs b/runtime-modules/membership/src/tests.rs
index 5252fd60ce..1809612c22 100644
--- a/runtime-modules/membership/src/tests.rs
+++ b/runtime-modules/membership/src/tests.rs
@@ -3,10 +3,10 @@
 use super::genesis;
 use super::mock::*;
 
-use srml_support::*;
+use frame_support::*;
 
 fn get_membership_by_id(member_id: u32) -> crate::Membership<Test> {
-    if <crate::MembershipById<Test>>::exists(member_id) {
+    if <crate::MembershipById<Test>>::contains_key(member_id) {
         Members::membership(member_id)
     } else {
         panic!("member profile not created");
@@ -52,15 +52,16 @@ fn get_bob_info() -> TestUserInfo {
 
 const ALICE_ACCOUNT_ID: u64 = 1;
 
-fn buy_default_membership_as_alice() -> dispatch::Result {
+fn buy_default_membership_as_alice() -> crate::DispatchResult {
     let info = get_alice_info();
     Members::buy_membership(
         Origin::signed(ALICE_ACCOUNT_ID),
-        DEFAULT_PAID_TERM_ID,
+        DEFAULT_PAID_TERM_ID as u32,
         info.handle,
         info.avatar_uri,
         info.about,
     )
+    .map_err(|err| err.into())
 }
 
 fn set_alice_free_balance(balance: u64) {
@@ -81,12 +82,13 @@ fn initial_state() {
         )
         .build()
         .execute_with(|| {
-            let default_terms =
-                if <crate::PaidMembershipTermsById<Test>>::exists(DEFAULT_PAID_TERM_ID) {
-                    Members::paid_membership_terms_by_id(DEFAULT_PAID_TERM_ID)
-                } else {
-                    panic!("default terms not initialized");
-                };
+            let default_terms = if <crate::PaidMembershipTermsById<Test>>::contains_key(
+                DEFAULT_PAID_TERM_ID as u32,
+            ) {
+                Members::paid_membership_terms_by_id(DEFAULT_PAID_TERM_ID as u32)
+            } else {
+                panic!("default terms not initialized");
+            };
 
             assert_eq!(default_terms.fee, DEFAULT_FEE);
         });
diff --git a/runtime-modules/memo/Cargo.toml b/runtime-modules/memo/Cargo.toml
index 1ec371433a..5179cde23e 100644
--- a/runtime-modules/memo/Cargo.toml
+++ b/runtime-modules/memo/Cargo.toml
@@ -1,58 +1,22 @@
 [package]
-name = 'substrate-memo-module'
-version = '1.0.0'
+name = 'pallet-memo'
+version = '3.0.0'
 authors = ['Joystream contributors']
 edition = '2018'
 
+[dependencies]
+codec = { package = 'parity-scale-codec', version = '1.3.1', default-features = false, features = ['derive'] }
+sp-arithmetic = { package = 'sp-arithmetic', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+frame-support = { package = 'frame-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+system = { package = 'frame-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+common = { package = 'pallet-common', default-features = false, path = '../common'}
 
 [features]
 default = ['std']
 std = [
-	'sr-primitives/std',
-	'srml-support/std',
-	'system/std',
-	'rstd/std',
 	'codec/std',
-	'serde',
+	'sp-arithmetic/std',
+	'frame-support/std',
+	'system/std',
 	'common/std',
-]
-
-[dependencies.sr-primitives]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'sr-primitives'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.srml-support]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-support'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.system]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-system'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.rstd]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'sr-std'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.codec]
-default-features = false
-features = ['derive']
-package = 'parity-scale-codec'
-version = '1.0.0'
-
-[dependencies.serde]
-features = ['derive']
-optional = true
-version = '1.0.101'
-
-[dependencies.common]
-default_features = false
-package = 'substrate-common-module'
-path = '../common'
\ No newline at end of file
+]
\ No newline at end of file
diff --git a/runtime-modules/memo/src/lib.rs b/runtime-modules/memo/src/lib.rs
index 7c3b876ffa..7c831a0a00 100644
--- a/runtime-modules/memo/src/lib.rs
+++ b/runtime-modules/memo/src/lib.rs
@@ -1,14 +1,13 @@
 // Ensure we're `no_std` when compiling for Wasm.
 #![cfg_attr(not(feature = "std"), no_std)]
 
-use common::currency::GovernanceCurrency;
-use rstd::prelude::*;
-use sr_primitives::traits::Zero;
-use srml_support::traits::Currency;
-use srml_support::{decl_event, decl_module, decl_storage, ensure};
-
+use frame_support::traits::Currency;
+use frame_support::{decl_event, decl_module, decl_storage, ensure};
+use sp_arithmetic::traits::Zero;
 use system::{self, ensure_signed};
 
+use common::currency::GovernanceCurrency;
+
 pub trait Trait: system::Trait + GovernanceCurrency {
     type Event: From<Event<Self>> + Into<<Self as system::Trait>::Event>;
 }
@@ -17,8 +16,8 @@ pub type MemoText = Vec<u8>;
 
 decl_storage! {
     trait Store for Module<T: Trait> as Memo {
-        Memo get(memo) : map T::AccountId => MemoText;
-        MaxMemoLength get(max_memo_length) : u32 = 4096;
+        Memo get(fn memo) : map hasher(blake2_128_concat) T::AccountId => MemoText;
+        MaxMemoLength get(fn max_memo_length) : u32 = 4096;
     }
 }
 
@@ -32,6 +31,7 @@ decl_module! {
     pub struct Module<T: Trait> for enum Call where origin: T::Origin {
         fn deposit_event() = default;
 
+        #[weight = 10_000_000] // TODO: adjust weight
         fn update_memo(origin, memo: MemoText) {
             let sender = ensure_signed(origin)?;
 
diff --git a/runtime-modules/proposals/engine/Cargo.toml b/runtime-modules/proposals/engine/Cargo.toml
index 552887ccda..6c7b2a6e08 100644
--- a/runtime-modules/proposals/engine/Cargo.toml
+++ b/runtime-modules/proposals/engine/Cargo.toml
@@ -96,7 +96,7 @@ package = 'substrate-common-module'
 path = '../../common'
 
 [dev-dependencies]
-mockall = "0.6.0"
+mockall = "0.7.1"
 
 [dev-dependencies.runtime-io]
 default_features = false
diff --git a/runtime-modules/recurring-reward/Cargo.toml b/runtime-modules/recurring-reward/Cargo.toml
index 10caf40b43..401f4824fb 100755
--- a/runtime-modules/recurring-reward/Cargo.toml
+++ b/runtime-modules/recurring-reward/Cargo.toml
@@ -1,56 +1,29 @@
 [package]
-name = 'substrate-recurring-reward-module'
-version = '1.0.1'
+name = 'pallet-recurring-reward'
+version = '3.0.0'
 authors = ['Joystream contributors']
 edition = '2018'
 
 [dependencies]
-hex-literal = '0.1.0'
-serde = { version = '1.0', optional = true }
-serde_derive = { version = '1.0', optional = true }
-rstd = { package = 'sr-std', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-runtime-primitives = { package = 'sr-primitives', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-srml-support = { package = 'srml-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-srml-support-procedural = { package = 'srml-support-procedural', git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-system = { package = 'srml-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-balances = { package = 'srml-balances', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-codec = { package = 'parity-scale-codec', version = '1.0.0', default-features = false, features = ['derive'] }
-# https://users.rust-lang.org/t/failure-derive-compilation-error/39062
-quote = '<=1.0.2'
-
-[dependencies.timestamp]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-timestamp'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.runtime-io]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'sr-io'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.minting]
-default_features = false
-package = 'substrate-token-mint-module'
-path = '../token-minting'
+codec = { package = 'parity-scale-codec', version = '1.3.1', default-features = false, features = ['derive'] }
+sp-arithmetic = { package = 'sp-arithmetic', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-runtime = { package = 'sp-runtime', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+frame-support = { package = 'frame-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+system = { package = 'frame-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+minting = { package = 'pallet-token-mint', default-features = false, path = '../token-minting'}
 
 [dev-dependencies]
-runtime-io = { package = 'sr-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-primitives = { package = 'substrate-primitives', git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
+sp-io = { package = 'sp-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-core = { package = 'sp-core', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+balances = { package = 'pallet-balances', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
 
 [features]
 default = ['std']
 std = [
-	'serde',
-	'serde_derive',
 	'codec/std',
-	'rstd/std',
-	'runtime-io/std',
-	'runtime-primitives/std',
-	'srml-support/std',
+	'sp-arithmetic/std',
+	'sp-runtime/std',
+	'frame-support/std',
 	'system/std',
-  	'balances/std',
-	'timestamp/std',
 	'minting/std',
 ]
diff --git a/runtime-modules/recurring-reward/src/lib.rs b/runtime-modules/recurring-reward/src/lib.rs
index 946e0b75a3..ebdc157407 100755
--- a/runtime-modules/recurring-reward/src/lib.rs
+++ b/runtime-modules/recurring-reward/src/lib.rs
@@ -7,11 +7,12 @@
 
 // Ensure we're `no_std` when compiling for Wasm.
 #![cfg_attr(not(feature = "std"), no_std)]
-use rstd::prelude::*;
 
 use codec::{Codec, Decode, Encode};
-use runtime_primitives::traits::{MaybeSerialize, Member, One, SimpleArithmetic, Zero};
-use srml_support::{decl_module, decl_storage, ensure, Parameter};
+use frame_support::storage::IterableStorageMap;
+use frame_support::{decl_module, decl_storage, ensure, Parameter};
+use sp_arithmetic::traits::{BaseArithmetic, One, Zero};
+use sp_runtime::traits::{MaybeSerialize, Member};
 
 use minting::{self, BalanceOf};
 
@@ -24,7 +25,7 @@ pub trait Trait: system::Trait + minting::Trait {
     /// Type of identifier for recipients.
     type RecipientId: Parameter
         + Member
-        + SimpleArithmetic
+        + BaseArithmetic
         + Codec
         + Default
         + Copy
@@ -34,7 +35,7 @@ pub trait Trait: system::Trait + minting::Trait {
     /// Type for identifier for relationship representing that a recipient recieves recurring reward from a token mint
     type RewardRelationshipId: Parameter
         + Member
-        + SimpleArithmetic
+        + BaseArithmetic
         + Codec
         + Default
         + Copy
@@ -142,13 +143,15 @@ impl<AccountId: Clone, Balance: Clone, BlockNumber: Clone, MintId: Clone, Recipi
 
 decl_storage! {
     trait Store for Module<T: Trait> as RecurringReward {
-        Recipients get(recipients): linked_map T::RecipientId => Recipient<BalanceOf<T>>;
+        Recipients get(fn recipients): map hasher(blake2_128_concat)
+            T::RecipientId => Recipient<BalanceOf<T>>;
 
-        RecipientsCreated get(recipients_created): T::RecipientId;
+        RecipientsCreated get(fn recipients_created): T::RecipientId;
 
-        pub RewardRelationships get(reward_relationships): linked_map T::RewardRelationshipId => RewardRelationship<T::AccountId, BalanceOf<T>, T::BlockNumber, T::MintId, T::RecipientId>;
+        pub RewardRelationships get(fn reward_relationships): map hasher(blake2_128_concat)
+            T::RewardRelationshipId => RewardRelationship<T::AccountId, BalanceOf<T>, T::BlockNumber, T::MintId, T::RecipientId>;
 
-        RewardRelationshipsCreated get(reward_relationships_created): T::RewardRelationshipId;
+        RewardRelationshipsCreated get(fn reward_relationships_created): T::RewardRelationshipId;
     }
 }
 
@@ -192,7 +195,7 @@ impl<T: Trait> Module<T> {
             RewardsError::RewardSourceNotFound
         );
         ensure!(
-            <Recipients<T>>::exists(recipient),
+            <Recipients<T>>::contains_key(recipient),
             RewardsError::RecipientNotFound
         );
         ensure!(
@@ -220,7 +223,7 @@ impl<T: Trait> Module<T> {
 
     /// Removes a relationship from RewardRelashionships and its recipient.
     pub fn remove_reward_relationship(id: T::RewardRelationshipId) {
-        if <RewardRelationships<T>>::exists(&id) {
+        if <RewardRelationships<T>>::contains_key(&id) {
             <Recipients<T>>::remove(<RewardRelationships<T>>::take(&id).recipient);
         }
     }
@@ -282,7 +285,7 @@ impl<T: Trait> Module<T> {
         new_payout_interval: Option<Option<T::BlockNumber>>,
     ) -> Result<(), RewardsError> {
         ensure!(
-            <RewardRelationships<T>>::exists(&id),
+            <RewardRelationships<T>>::contains_key(&id),
             RewardsError::RewardRelationshipNotFound
         );
 
@@ -320,8 +323,8 @@ impl<T: Trait> Module<T> {
     Otherwise, analogous steps for failure.
     */
     fn do_payouts(now: T::BlockNumber) {
-        for (relationship_id, ref mut relationship) in <RewardRelationships<T>>::enumerate() {
-            assert!(<Recipients<T>>::exists(&relationship.recipient));
+        for (relationship_id, ref mut relationship) in <RewardRelationships<T>>::iter() {
+            assert!(<Recipients<T>>::contains_key(&relationship.recipient));
 
             let mut recipient = Self::recipients(relationship.recipient);
 
@@ -394,7 +397,7 @@ impl<T: Trait> Module<T> {
         RewardRelationship<T::AccountId, BalanceOf<T>, T::BlockNumber, T::MintId, T::RecipientId>,
         (),
     > {
-        ensure!(RewardRelationships::<T>::exists(id), ());
+        ensure!(RewardRelationships::<T>::contains_key(id), ());
 
         let relationship = RewardRelationships::<T>::get(id);
 
diff --git a/runtime-modules/recurring-reward/src/mock/mod.rs b/runtime-modules/recurring-reward/src/mock/mod.rs
index de454a72cc..0f54d38462 100644
--- a/runtime-modules/recurring-reward/src/mock/mod.rs
+++ b/runtime-modules/recurring-reward/src/mock/mod.rs
@@ -1,18 +1,16 @@
 #![cfg(test)]
 
-// use crate::*;
 use crate::{Module, Trait};
 
-use primitives::H256;
-
 use balances;
+use frame_support::{impl_outer_origin, parameter_types};
 use minting;
-use runtime_primitives::{
+use sp_core::H256;
+use sp_runtime::{
     testing::Header,
     traits::{BlakeTwo256, IdentityLookup},
     Perbill,
 };
-use srml_support::{impl_outer_origin, parameter_types};
 
 mod status_handler;
 pub use status_handler::MockStatusHandler;
@@ -33,10 +31,11 @@ parameter_types! {
 }
 
 impl system::Trait for Test {
+    type BaseCallFilter = ();
     type Origin = Origin;
+    type Call = ();
     type Index = u64;
     type BlockNumber = u64;
-    type Call = ();
     type Hash = H256;
     type Hashing = BlakeTwo256;
     type AccountId = u64;
@@ -45,34 +44,29 @@ impl system::Trait for Test {
     type Event = ();
     type BlockHashCount = BlockHashCount;
     type MaximumBlockWeight = MaximumBlockWeight;
+    type DbWeight = ();
+    type BlockExecutionWeight = ();
+    type ExtrinsicBaseWeight = ();
+    type MaximumExtrinsicWeight = ();
     type MaximumBlockLength = MaximumBlockLength;
     type AvailableBlockRatio = AvailableBlockRatio;
     type Version = ();
+    type ModuleToIndex = ();
+    type AccountData = balances::AccountData<u64>;
+    type OnNewAccount = ();
+    type OnKilledAccount = ();
 }
 
 parameter_types! {
     pub const ExistentialDeposit: u32 = 0;
-    pub const TransferFee: u32 = 0;
-    pub const CreationFee: u32 = 0;
-    pub const TransactionBaseFee: u32 = 1;
-    pub const TransactionByteFee: u32 = 0;
 }
 
 impl balances::Trait for Test {
-    /// The type for recording an account's balance.
     type Balance = u64;
-    /// What to do if an account's free balance gets zeroed.
-    type OnFreeBalanceZero = ();
-    /// What to do if a new account is created.
-    type OnNewAccount = ();
-    /// The ubiquitous event type.
-    type Event = ();
-
     type DustRemoval = ();
-    type TransferPayment = ();
+    type Event = ();
     type ExistentialDeposit = ExistentialDeposit;
-    type TransferFee = TransferFee;
-    type CreationFee = CreationFee;
+    type AccountStore = System;
 }
 
 impl Trait for Test {
@@ -86,7 +80,7 @@ impl minting::Trait for Test {
     type MintId = u64;
 }
 
-pub fn build_test_externalities() -> runtime_io::TestExternalities {
+pub fn build_test_externalities() -> sp_io::TestExternalities {
     MockStatusHandler::reset();
 
     let t = system::GenesisConfig::default()
diff --git a/runtime-modules/recurring-reward/src/tests.rs b/runtime-modules/recurring-reward/src/tests.rs
index 8326682b68..3546602dbd 100644
--- a/runtime-modules/recurring-reward/src/tests.rs
+++ b/runtime-modules/recurring-reward/src/tests.rs
@@ -2,7 +2,7 @@
 
 use super::*;
 use crate::mock::*;
-use srml_support::traits::Currency;
+use frame_support::traits::Currency;
 
 fn create_new_mint_with_capacity(capacity: u64) -> u64 {
     let mint_id = Minting::add_mint(capacity, None).ok().unwrap();
@@ -15,9 +15,9 @@ fn create_new_mint_with_capacity(capacity: u64) -> u64 {
 fn adding_recipients() {
     build_test_externalities().execute_with(|| {
         let next_id = Rewards::recipients_created();
-        assert!(!<Recipients<Test>>::exists(&next_id));
+        assert!(!<Recipients<Test>>::contains_key(&next_id));
         let recipient_id = Rewards::add_recipient();
-        assert!(<Recipients<Test>>::exists(&next_id));
+        assert!(<Recipients<Test>>::contains_key(&next_id));
         assert_eq!(recipient_id, next_id);
         assert_eq!(Rewards::recipients_created(), next_id + 1);
     });
@@ -49,7 +49,7 @@ fn adding_relationships() {
             Rewards::reward_relationships_created(),
             next_relationship_id + 1
         );
-        assert!(<RewardRelationships<Test>>::exists(&relationship_id));
+        assert!(<RewardRelationships<Test>>::contains_key(&relationship_id));
         let relationship = Rewards::reward_relationships(&relationship_id);
         assert_eq!(relationship.next_payment_at_block, Some(next_payment_at));
         assert_eq!(relationship.amount_per_payout, payout);
diff --git a/runtime-modules/stake/Cargo.toml b/runtime-modules/stake/Cargo.toml
index d8de052e4c..74b3605d21 100755
--- a/runtime-modules/stake/Cargo.toml
+++ b/runtime-modules/stake/Cargo.toml
@@ -1,50 +1,30 @@
 [package]
-name = 'substrate-stake-module'
-version = '2.0.0'
+name = 'pallet-stake'
+version = '3.0.0'
 authors = ['Joystream contributors']
 edition = '2018'
 
 [dependencies]
-hex-literal = '0.1.0'
-serde = { version = '1.0', optional = true }
-serde_derive = { version = '1.0', optional = true }
-rstd = { package = 'sr-std', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-runtime-primitives = { package = 'sr-primitives', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-srml-support = { package = 'srml-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-srml-support-procedural = { package = 'srml-support-procedural', git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-system = { package = 'srml-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-balances = { package = 'srml-balances', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-codec = { package = 'parity-scale-codec', version = '1.0.0', default-features = false, features = ['derive'] }
-# https://users.rust-lang.org/t/failure-derive-compilation-error/39062
-quote = '<=1.0.2'
-
-[dependencies.timestamp]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-timestamp'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.runtime-io]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'sr-io'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
+codec = { package = 'parity-scale-codec', version = '1.3.1', default-features = false, features = ['derive'] }
+rstd = { package = 'sp-std', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+frame-support = { package = 'frame-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+system = { package = 'frame-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-arithmetic = { package = 'sp-arithmetic', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-runtime = { package = 'sp-runtime', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
 
 [dev-dependencies]
-runtime-io = { package = 'sr-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-primitives = { package = 'substrate-primitives', git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
+sp-io = { package = 'sp-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-core = { package = 'sp-core', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+timestamp = { package = 'pallet-timestamp', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+balances = { package = 'pallet-balances', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
 
 [features]
 default = ['std']
 std = [
-	'serde',
-	'serde_derive',
 	'codec/std',
 	'rstd/std',
-	'runtime-io/std',
-	'runtime-primitives/std',
-	'srml-support/std',
+	'frame-support/std',
 	'system/std',
-  	'balances/std',
-	'timestamp/std',
-]
+	'sp-arithmetic/std',
+	'sp-runtime/std',
+]
\ No newline at end of file
diff --git a/runtime-modules/stake/src/lib.rs b/runtime-modules/stake/src/lib.rs
index 572175ef3c..e98dd8467f 100755
--- a/runtime-modules/stake/src/lib.rs
+++ b/runtime-modules/stake/src/lib.rs
@@ -1,17 +1,15 @@
 // Ensure we're `no_std` when compiling for Wasm.
 #![cfg_attr(not(feature = "std"), no_std)]
 
-use rstd::prelude::*;
-
 use codec::{Codec, Decode, Encode};
-use runtime_primitives::traits::{
-    AccountIdConversion, MaybeSerialize, Member, One, SimpleArithmetic, Zero,
-};
-use runtime_primitives::ModuleId;
-use srml_support::traits::{Currency, ExistenceRequirement, Get, Imbalance, WithdrawReasons};
-use srml_support::{decl_module, decl_storage, ensure, Parameter};
-
+use frame_support::storage::IterableStorageMap;
+use frame_support::traits::{Currency, ExistenceRequirement, Get, Imbalance, WithdrawReasons};
+use frame_support::{decl_module, decl_storage, ensure, Parameter};
 use rstd::collections::btree_map::BTreeMap;
+use rstd::prelude::*;
+use sp_arithmetic::traits::{BaseArithmetic, One, Zero};
+use sp_runtime::traits::{AccountIdConversion, MaybeSerialize, Member};
+use sp_runtime::ModuleId;
 
 mod errors;
 pub use errors::*;
@@ -38,7 +36,7 @@ pub trait Trait: system::Trait + Sized {
     /// The type used as a stake identifier.
     type StakeId: Parameter
         + Member
-        + SimpleArithmetic
+        + BaseArithmetic
         + Codec
         + Default
         + Copy
@@ -48,7 +46,7 @@ pub trait Trait: system::Trait + Sized {
     /// The type used as slash identifier.
     type SlashId: Parameter
         + Member
-        + SimpleArithmetic
+        + BaseArithmetic
         + Codec
         + Default
         + Copy
@@ -201,8 +199,8 @@ pub struct StakedState<BlockNumber, Balance, SlashId: Ord> {
 
 impl<BlockNumber, Balance, SlashId> StakedState<BlockNumber, Balance, SlashId>
 where
-    BlockNumber: SimpleArithmetic + Copy,
-    Balance: SimpleArithmetic + Copy,
+    BlockNumber: BaseArithmetic + Copy,
+    Balance: BaseArithmetic + Copy,
     SlashId: Ord + Copy,
 {
     /// Iterates over all ongoing slashes and decrements blocks_remaining_in_active_period_for_slashing of active slashes (advancing the timer).
@@ -268,7 +266,7 @@ where
     /// For all slahes that should be executed, will apply the Slash to the staked amount, and drop it from the ongoing slashes map.
     /// Returns a vector of the executed slashes outcome: (SlashId, Slashed Amount, Remaining Staked Amount)
     fn finalize_slashes(&mut self, minimum_balance: Balance) -> Vec<(SlashId, Balance, Balance)> {
-        let mut finalized_slashes: Vec<(SlashId, Balance, Balance)> = vec![];
+        let mut finalized_slashes: Vec<(SlashId, Balance, Balance)> = Vec::new();
 
         for (slash_id, slash) in self.get_slashes_to_finalize().iter() {
             // apply the slashing and get back actual amount slashed
@@ -305,8 +303,8 @@ pub struct Stake<BlockNumber, Balance, SlashId: Ord> {
 
 impl<BlockNumber, Balance, SlashId> Stake<BlockNumber, Balance, SlashId>
 where
-    BlockNumber: Copy + SimpleArithmetic + Zero,
-    Balance: Copy + SimpleArithmetic,
+    BlockNumber: Copy + BaseArithmetic + Zero,
+    Balance: Copy + BaseArithmetic,
     SlashId: Copy + Ord + Zero + One,
 {
     fn new(created_at: BlockNumber) -> Self {
@@ -638,7 +636,7 @@ where
 
                 (did_update, slashed)
             }
-            _ => (false, vec![]),
+            _ => (false, Vec::new()),
         }
     }
 
@@ -711,11 +709,12 @@ pub struct SlashImmediateOutcome<Balance, NegativeImbalance> {
 decl_storage! {
     trait Store for Module<T: Trait> as StakePool {
         /// Maps identifiers to a stake.
-        pub Stakes get(stakes): linked_map T::StakeId => Stake<T::BlockNumber, BalanceOf<T>, T::SlashId>;
+        pub Stakes get(fn stakes): map hasher(blake2_128_concat)
+            T::StakeId => Stake<T::BlockNumber, BalanceOf<T>, T::SlashId>;
 
         /// Identifier value for next stake, and count of total stakes created (not necessarily the number of current
         /// stakes in the Stakes map as stakes can be removed.)
-        pub StakesCreated get(stakes_created): T::StakeId;
+        pub StakesCreated get(fn stakes_created): T::StakeId;
     }
 }
 
@@ -900,14 +899,11 @@ impl<T: Trait> Module<T> {
         source_account_id: &T::AccountId,
         value: BalanceOf<T>,
     ) -> Result<BalanceOf<T>, StakeActionError<IncreasingStakeFromAccountError>> {
-        // Compiler error when using macro: cannot infer type for `ErrorType`
-        // let mut stake = ensure_stake_exists!(T, stake_id, StakeActionError::StakeNotFound)?;
-        ensure!(
-            <Stakes<T>>::exists(stake_id),
-            StakeActionError::StakeNotFound
-        );
-
-        let mut stake = Self::stakes(stake_id);
+        let mut stake = ensure_stake_exists!(
+            T,
+            stake_id,
+            <StakeActionError<IncreasingStakeFromAccountError>>::StakeNotFound
+        )?;
 
         let total_staked_amount = stake.increase_stake(value)?;
 
@@ -1141,7 +1137,7 @@ impl<T: Trait> Module<T> {
     /// Finalised slashing results in the staked_balance in the given stake being correspondingly reduced, and the imbalance
     /// is provided to the slashed() hook in the StakingEventsHandler.
     fn finalize_slashing_and_unstaking() {
-        for (stake_id, ref mut stake) in <Stakes<T>>::enumerate() {
+        for (stake_id, ref mut stake) in <Stakes<T>>::iter() {
             let (updated, slashed, unstaked) =
                 stake.finalize_slashing_and_unstaking(T::Currency::minimum_balance());
 
diff --git a/runtime-modules/stake/src/macroes.rs b/runtime-modules/stake/src/macroes.rs
index 56d76e4787..02ba974a37 100644
--- a/runtime-modules/stake/src/macroes.rs
+++ b/runtime-modules/stake/src/macroes.rs
@@ -1,7 +1,7 @@
 #[macro_export]
 macro_rules! ensure_map_has_mapping_with_key {
     ($map_variable_name:ident , $runtime_trait:tt, $key:expr, $error:expr) => {{
-        if <$map_variable_name<$runtime_trait>>::exists($key) {
+        if <$map_variable_name<$runtime_trait>>::contains_key($key) {
             let value = <$map_variable_name<$runtime_trait>>::get($key);
 
             Ok(value)
diff --git a/runtime-modules/stake/src/mock.rs b/runtime-modules/stake/src/mock.rs
index 44f85398d0..5ce19e87b3 100644
--- a/runtime-modules/stake/src/mock.rs
+++ b/runtime-modules/stake/src/mock.rs
@@ -1,17 +1,15 @@
 #![cfg(test)]
 
 use crate::*;
-
-use primitives::H256;
-
 use crate::{Module, Trait};
 use balances;
-use runtime_primitives::{
+use frame_support::{impl_outer_origin, parameter_types};
+use sp_core::H256;
+use sp_runtime::{
     testing::Header,
     traits::{BlakeTwo256, IdentityLookup},
     Perbill,
 };
-use srml_support::{impl_outer_origin, parameter_types};
 
 impl_outer_origin! {
     pub enum Origin for Test {}
@@ -25,14 +23,14 @@ parameter_types! {
     pub const MaximumBlockWeight: u32 = 1024;
     pub const MaximumBlockLength: u32 = 2 * 1024;
     pub const AvailableBlockRatio: Perbill = Perbill::one();
-    pub const MinimumPeriod: u64 = 5;
 }
 
 impl system::Trait for Test {
+    type BaseCallFilter = ();
     type Origin = Origin;
+    type Call = ();
     type Index = u64;
     type BlockNumber = u64;
-    type Call = ();
     type Hash = H256;
     type Hashing = BlakeTwo256;
     type AccountId = u64;
@@ -41,35 +39,30 @@ impl system::Trait for Test {
     type Event = ();
     type BlockHashCount = BlockHashCount;
     type MaximumBlockWeight = MaximumBlockWeight;
+    type DbWeight = ();
+    type BlockExecutionWeight = ();
+    type ExtrinsicBaseWeight = ();
+    type MaximumExtrinsicWeight = ();
     type MaximumBlockLength = MaximumBlockLength;
     type AvailableBlockRatio = AvailableBlockRatio;
     type Version = ();
+    type ModuleToIndex = ();
+    type AccountData = balances::AccountData<u64>;
+    type OnNewAccount = ();
+    type OnKilledAccount = ();
 }
 
 parameter_types! {
     pub const ExistentialDeposit: u32 = 500;
-    pub const TransferFee: u32 = 5;
-    pub const CreationFee: u32 = 5;
-    pub const TransactionBaseFee: u32 = 5;
-    pub const TransactionByteFee: u32 = 0;
     pub const StakePoolId: [u8; 8] = *b"joystake";
 }
 
 impl balances::Trait for Test {
-    /// The type for recording an account's balance.
     type Balance = u64;
-    /// What to do if an account's free balance gets zeroed.
-    type OnFreeBalanceZero = ();
-    /// What to do if a new account is created.
-    type OnNewAccount = ();
-    /// The ubiquitous event type.
-    type Event = ();
-
     type DustRemoval = ();
-    type TransferPayment = ();
+    type Event = ();
     type ExistentialDeposit = ExistentialDeposit;
-    type TransferFee = TransferFee;
-    type CreationFee = CreationFee;
+    type AccountStore = System;
 }
 
 impl Trait for Test {
@@ -80,7 +73,7 @@ impl Trait for Test {
     type SlashId = u64;
 }
 
-pub fn build_test_externalities() -> runtime_io::TestExternalities {
+pub fn build_test_externalities() -> sp_io::TestExternalities {
     let t = system::GenesisConfig::default()
         .build_storage::<Test>()
         .unwrap();
@@ -99,17 +92,4 @@ pub mod fixtures {
         <Test as Trait>::SlashId,
         Slash<<Test as system::Trait>::BlockNumber, BalanceOf<Test>>,
     >;
-    // pub enum StakeInState {
-    //     NotStaked,
-    //     StakedNormal(BalanceOf<Test>, OngoingSlashes),
-    //     StakedUnstaking(BalanceOf<Test>, OngoingSlashes, <Test as system::Trait>::BlockNumber),
-    // }
-    // fn get_next_slash_id() -> SlashId {
-    // }
-    // pub fn make_stake(state: StakeInState) -> StakeId {
-    //     let id = StakePool::create_stake();
-    //     <Stakes<Test>>::mutate(id, |stake| {});
-    //     id
-    // }
-    // fn stake_in_state_to_stake(StakeInState) -> StakedState {}
 }
diff --git a/runtime-modules/stake/src/tests.rs b/runtime-modules/stake/src/tests.rs
index daf23d7c49..e46d0181d3 100644
--- a/runtime-modules/stake/src/tests.rs
+++ b/runtime-modules/stake/src/tests.rs
@@ -2,8 +2,8 @@
 
 use super::*;
 use crate::mock::*;
-use runtime_primitives::traits::OnFinalize;
-use srml_support::{assert_err, assert_ok};
+use frame_support::traits::OnFinalize;
+use frame_support::{assert_err, assert_ok};
 
 #[test]
 fn stake_pool_works() {
@@ -70,7 +70,7 @@ fn create_stake() {
     build_test_externalities().execute_with(|| {
         let stake_id = StakePool::create_stake();
         assert_eq!(stake_id, 0);
-        assert!(<Stakes<Test>>::exists(&stake_id));
+        assert!(<Stakes<Test>>::contains_key(&stake_id));
 
         assert_eq!(StakePool::stakes_created(), stake_id + 1);
 
@@ -91,7 +91,7 @@ fn remove_stake_in_not_staked_state() {
             },
         );
         assert_ok!(StakePool::remove_stake(&100));
-        assert!(!<Stakes<Test>>::exists(&100));
+        assert!(!<Stakes<Test>>::contains_key(&100));
 
         // when status is Staked, removing should fail
         <Stakes<Test>>::insert(
@@ -106,7 +106,7 @@ fn remove_stake_in_not_staked_state() {
             StakePool::remove_stake(&200),
             StakeActionError::Error(StakingError::AlreadyStaked)
         );
-        assert!(<Stakes<Test>>::exists(&200));
+        assert!(<Stakes<Test>>::contains_key(&200));
     });
 }
 
diff --git a/runtime-modules/token-minting/Cargo.toml b/runtime-modules/token-minting/Cargo.toml
index ec9d8afb97..ac868264d8 100755
--- a/runtime-modules/token-minting/Cargo.toml
+++ b/runtime-modules/token-minting/Cargo.toml
@@ -1,50 +1,27 @@
 [package]
-name = 'substrate-token-mint-module'
-version = '1.0.1'
+name = 'pallet-token-mint'
+version = '3.0.0'
 authors = ['Joystream contributors']
 edition = '2018'
 
 [dependencies]
-hex-literal = '0.1.0'
-serde = { version = '1.0.101', optional = true}
-serde_derive = { version = '1.0.101', optional = true }
-rstd = { package = 'sr-std', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-runtime-primitives = { package = 'sr-primitives', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-srml-support = { package = 'srml-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-srml-support-procedural = { package = 'srml-support-procedural', git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-system = { package = 'srml-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-balances = { package = 'srml-balances', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-codec = { package = 'parity-scale-codec', version = '1.0.0', default-features = false, features = ['derive'] }
-# https://users.rust-lang.org/t/failure-derive-compilation-error/39062
-quote = '<=1.0.2'
-
-[dependencies.timestamp]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-timestamp'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.runtime-io]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'sr-io'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
+codec = { package = 'parity-scale-codec', version = '1.3.1', default-features = false, features = ['derive'] }
+sp-arithmetic = { package = 'sp-arithmetic', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-runtime = { package = 'sp-runtime', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+frame-support = { package = 'frame-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+system = { package = 'frame-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
 
 [dev-dependencies]
-runtime-io = { package = 'sr-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-primitives = { package = 'substrate-primitives', git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
+sp-io = { package = 'sp-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-core = { package = 'sp-core', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+balances = { package = 'pallet-balances', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
 
 [features]
 default = ['std']
 std = [
-	'serde',
-	'serde_derive',
 	'codec/std',
-	'rstd/std',
-	'runtime-io/std',
-	'runtime-primitives/std',
-	'srml-support/std',
+	'sp-arithmetic/std',
+	'sp-runtime/std',
+	'frame-support/std',
 	'system/std',
-  	'balances/std',
-	'timestamp/std',
 ]
diff --git a/runtime-modules/token-minting/src/lib.rs b/runtime-modules/token-minting/src/lib.rs
index 1604762b02..a1c31089e8 100755
--- a/runtime-modules/token-minting/src/lib.rs
+++ b/runtime-modules/token-minting/src/lib.rs
@@ -6,13 +6,12 @@
 // Ensure we're `no_std` when compiling for Wasm.
 #![cfg_attr(not(feature = "std"), no_std)]
 
-#[cfg(feature = "std")]
-use rstd::prelude::*;
-
 use codec::{Codec, Decode, Encode};
-use runtime_primitives::traits::{MaybeSerialize, Member, One, SimpleArithmetic, Zero};
-use srml_support::traits::Currency;
-use srml_support::{decl_module, decl_storage, ensure, Parameter};
+use frame_support::storage::IterableStorageMap;
+use frame_support::traits::Currency;
+use frame_support::{decl_module, decl_storage, ensure, Parameter};
+use sp_arithmetic::traits::{BaseArithmetic, One, Zero};
+use sp_runtime::traits::{MaybeSerialize, Member};
 
 mod mint;
 mod mock;
@@ -27,7 +26,7 @@ pub trait Trait: system::Trait {
     /// The type used as a mint identifier.
     type MintId: Parameter
         + Member
-        + SimpleArithmetic
+        + BaseArithmetic
         + Codec
         + Default
         + Copy
@@ -107,13 +106,13 @@ pub enum Adjustment<Balance: Zero, BlockNumber> {
 decl_storage! {
     trait Store for Module<T: Trait> as TokenMint {
         /// Mints
-        pub Mints get(mints) : linked_map T::MintId => Mint<BalanceOf<T>, T::BlockNumber>;
+        pub Mints get(fn mints) : map hasher(blake2_128_concat) T::MintId => Mint<BalanceOf<T>, T::BlockNumber>;
 
         /// The number of mints created.
-        pub MintsCreated get(mints_created): T::MintId;
+        pub MintsCreated get(fn mints_created): T::MintId;
     }
 }
-
+// pub Account: map hasher(blake2_128_concat) T::AccountId => AccountData<T::Balance>;
 decl_module! {
     pub struct Module<T: Trait> for enum Call where origin: T::Origin {
         fn on_finalize(now: T::BlockNumber) {
@@ -125,7 +124,7 @@ decl_module! {
 impl<T: Trait> Module<T> {
     fn update_mints(now: T::BlockNumber) {
         // Are we reading value from storage twice?
-        for (mint_id, ref mut mint) in <Mints<T>>::enumerate() {
+        for (mint_id, ref mut mint) in <Mints<T>>::iter() {
             if mint.maybe_do_capacity_adjustment(now) {
                 <Mints<T>>::insert(&mint_id, mint);
             }
@@ -199,7 +198,10 @@ impl<T: Trait> Module<T> {
             return Ok(());
         }
 
-        ensure!(<Mints<T>>::exists(&mint_id), TransferError::MintNotFound);
+        ensure!(
+            <Mints<T>>::contains_key(&mint_id),
+            TransferError::MintNotFound
+        );
 
         let mut mint = Self::mints(&mint_id);
 
@@ -219,7 +221,10 @@ impl<T: Trait> Module<T> {
         mint_id: T::MintId,
         capacity: BalanceOf<T>,
     ) -> Result<(), GeneralError> {
-        ensure!(<Mints<T>>::exists(&mint_id), GeneralError::MintNotFound);
+        ensure!(
+            <Mints<T>>::contains_key(&mint_id),
+            GeneralError::MintNotFound
+        );
 
         <Mints<T>>::mutate(&mint_id, |mint| {
             mint.set_capacity(capacity);
@@ -237,11 +242,11 @@ impl<T: Trait> Module<T> {
         capacity_to_transfer: BalanceOf<T>,
     ) -> Result<(), CapacityTransferError> {
         ensure!(
-            <Mints<T>>::exists(&source),
+            <Mints<T>>::contains_key(&source),
             CapacityTransferError::SourceMintNotFound
         );
         ensure!(
-            <Mints<T>>::exists(&destination),
+            <Mints<T>>::contains_key(&destination),
             CapacityTransferError::DestinationMintNotFound
         );
 
@@ -256,7 +261,10 @@ impl<T: Trait> Module<T> {
 
     /// Returns a mint's capacity if it exists, error otherwise.
     pub fn get_mint_capacity(mint_id: T::MintId) -> Result<BalanceOf<T>, GeneralError> {
-        ensure!(<Mints<T>>::exists(&mint_id), GeneralError::MintNotFound);
+        ensure!(
+            <Mints<T>>::contains_key(&mint_id),
+            GeneralError::MintNotFound
+        );
         let mint = Self::mints(&mint_id);
 
         Ok(mint.capacity())
@@ -266,7 +274,10 @@ impl<T: Trait> Module<T> {
     pub fn get_mint_next_adjustment(
         mint_id: T::MintId,
     ) -> Result<Option<NextAdjustment<BalanceOf<T>, T::BlockNumber>>, GeneralError> {
-        ensure!(<Mints<T>>::exists(&mint_id), GeneralError::MintNotFound);
+        ensure!(
+            <Mints<T>>::contains_key(&mint_id),
+            GeneralError::MintNotFound
+        );
 
         let mint = Self::mints(&mint_id);
 
@@ -275,6 +286,6 @@ impl<T: Trait> Module<T> {
 
     /// Returns true if a mint exists.
     pub fn mint_exists(mint_id: T::MintId) -> bool {
-        <Mints<T>>::exists(&mint_id)
+        <Mints<T>>::contains_key(&mint_id)
     }
 }
diff --git a/runtime-modules/token-minting/src/mint.rs b/runtime-modules/token-minting/src/mint.rs
index 9ec438a1bd..e76614925f 100644
--- a/runtime-modules/token-minting/src/mint.rs
+++ b/runtime-modules/token-minting/src/mint.rs
@@ -1,6 +1,6 @@
 use codec::{Decode, Encode};
-use runtime_primitives::traits::{SimpleArithmetic, Zero};
-use srml_support::ensure;
+use frame_support::ensure;
+use sp_arithmetic::traits::{BaseArithmetic, Zero};
 
 #[derive(Encode, Decode, Copy, Clone, Debug, Eq, PartialEq)]
 pub enum AdjustCapacityBy<Balance: Zero> {
@@ -30,8 +30,8 @@ pub struct NextAdjustment<Balance: Zero, BlockNumber> {
 // We want Default trait on TokenMint so we can use it as value in StorageMap without needing to wrap it in an Option
 pub struct Mint<Balance, BlockNumber>
 where
-    Balance: Copy + SimpleArithmetic + Zero,
-    BlockNumber: Copy + SimpleArithmetic,
+    Balance: Copy + BaseArithmetic + Zero,
+    BlockNumber: Copy + BaseArithmetic,
 {
     capacity: Balance,
 
@@ -51,8 +51,8 @@ pub enum MintingError {
 
 impl<Balance, BlockNumber> Mint<Balance, BlockNumber>
 where
-    Balance: Copy + SimpleArithmetic + Zero,
-    BlockNumber: Copy + SimpleArithmetic,
+    Balance: Copy + BaseArithmetic + Zero,
+    BlockNumber: Copy + BaseArithmetic,
 {
     pub fn new(
         initial_capacity: Balance,
diff --git a/runtime-modules/token-minting/src/mock.rs b/runtime-modules/token-minting/src/mock.rs
index fb839f9537..591d2589fa 100644
--- a/runtime-modules/token-minting/src/mock.rs
+++ b/runtime-modules/token-minting/src/mock.rs
@@ -1,17 +1,14 @@
 #![cfg(test)]
 
-use crate::*;
-
-use primitives::H256;
-
 use crate::{Module, Trait};
 use balances;
-use runtime_primitives::{
+use frame_support::{impl_outer_origin, parameter_types};
+use sp_core::H256;
+use sp_runtime::{
     testing::Header,
     traits::{BlakeTwo256, IdentityLookup},
     Perbill,
 };
-use srml_support::{impl_outer_origin, parameter_types};
 
 impl_outer_origin! {
     pub enum Origin for Test {}
@@ -25,14 +22,14 @@ parameter_types! {
     pub const MaximumBlockWeight: u32 = 1024;
     pub const MaximumBlockLength: u32 = 2 * 1024;
     pub const AvailableBlockRatio: Perbill = Perbill::one();
-    pub const MinimumPeriod: u64 = 5;
 }
 
 impl system::Trait for Test {
+    type BaseCallFilter = ();
     type Origin = Origin;
+    type Call = ();
     type Index = u64;
     type BlockNumber = u64;
-    type Call = ();
     type Hash = H256;
     type Hashing = BlakeTwo256;
     type AccountId = u64;
@@ -41,9 +38,17 @@ impl system::Trait for Test {
     type Event = ();
     type BlockHashCount = BlockHashCount;
     type MaximumBlockWeight = MaximumBlockWeight;
+    type DbWeight = ();
+    type BlockExecutionWeight = ();
+    type ExtrinsicBaseWeight = ();
+    type MaximumExtrinsicWeight = ();
     type MaximumBlockLength = MaximumBlockLength;
     type AvailableBlockRatio = AvailableBlockRatio;
     type Version = ();
+    type ModuleToIndex = ();
+    type AccountData = balances::AccountData<u64>;
+    type OnNewAccount = ();
+    type OnKilledAccount = ();
 }
 
 parameter_types! {
@@ -55,20 +60,11 @@ parameter_types! {
 }
 
 impl balances::Trait for Test {
-    /// The type for recording an account's balance.
     type Balance = u64;
-    /// What to do if an account's free balance gets zeroed.
-    type OnFreeBalanceZero = ();
-    /// What to do if a new account is created.
-    type OnNewAccount = ();
-    /// The ubiquitous event type.
-    type Event = ();
-
     type DustRemoval = ();
-    type TransferPayment = ();
+    type Event = ();
     type ExistentialDeposit = ExistentialDeposit;
-    type TransferFee = TransferFee;
-    type CreationFee = CreationFee;
+    type AccountStore = System;
 }
 
 impl Trait for Test {
@@ -76,7 +72,7 @@ impl Trait for Test {
     type MintId = u64;
 }
 
-pub fn build_test_externalities() -> runtime_io::TestExternalities {
+pub fn build_test_externalities() -> sp_io::TestExternalities {
     let t = system::GenesisConfig::default()
         .build_storage::<Test>()
         .unwrap();
diff --git a/runtime-modules/versioned-store-permissions/Cargo.toml b/runtime-modules/versioned-store-permissions/Cargo.toml
index f49cbf390a..b973cf2178 100755
--- a/runtime-modules/versioned-store-permissions/Cargo.toml
+++ b/runtime-modules/versioned-store-permissions/Cargo.toml
@@ -1,44 +1,31 @@
 [package]
-name = 'substrate-versioned-store-permissions-module'
-version = '1.0.1'
+name = 'pallet-versioned-store-permissions'
+version = '3.0.0'
 authors = ['Joystream contributors']
 edition = '2018'
 
 [dependencies]
-hex-literal = '0.1.0'
-serde = { version = '1.0', optional = true }
-serde_derive = { version = '1.0', optional = true }
-codec = { package = 'parity-scale-codec', version = '1.0.0', default-features = false, features = ['derive'] }
-rstd = { package = 'sr-std', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-runtime-primitives = { package = 'sr-primitives', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-srml-support = { package = 'srml-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-srml-support-procedural = { package = 'srml-support-procedural', git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-system = { package = 'srml-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-timestamp = { package = 'srml-timestamp', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-runtime-io = { package = 'sr-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-# https://users.rust-lang.org/t/failure-derive-compilation-error/39062
-quote = '<=1.0.2'
-
-[dependencies.versioned-store]
-default_features = false
-package ='substrate-versioned-store'
-path = '../versioned-store'
+codec = { package = 'parity-scale-codec', version = '1.3.1', default-features = false, features = ['derive'] }
+rstd = { package = 'sp-std', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+frame-support = { package = 'frame-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+system = { package = 'frame-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-arithmetic = { package = 'sp-arithmetic', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-runtime = { package = 'sp-runtime', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+versioned-store = { package = 'pallet-versioned-store', default-features = false, path = '../versioned-store'}
 
 [dev-dependencies]
-runtime-io = { package = 'sr-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-primitives = { package = 'substrate-primitives', git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
+sp-io = { package = 'sp-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-core = { package = 'sp-core', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+timestamp = { package = 'pallet-timestamp', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
 
 [features]
 default = ['std']
 std = [
-	'serde',
-	'serde_derive',
 	'codec/std',
 	'rstd/std',
-	'runtime-io/std',
-	'runtime-primitives/std',
-	'srml-support/std',
+	'frame-support/std',
 	'system/std',
-	'timestamp/std',
-	'versioned-store/std',
-]
+	'sp-arithmetic/std',
+	'sp-runtime/std',
+    'versioned-store/std',
+]
\ No newline at end of file
diff --git a/runtime-modules/versioned-store-permissions/src/credentials.rs b/runtime-modules/versioned-store-permissions/src/credentials.rs
index f31978dd07..bf3dbcc36e 100644
--- a/runtime-modules/versioned-store-permissions/src/credentials.rs
+++ b/runtime-modules/versioned-store-permissions/src/credentials.rs
@@ -1,6 +1,5 @@
 use codec::{Decode, Encode};
 use rstd::collections::btree_set::BTreeSet;
-use rstd::prelude::*;
 
 #[derive(Encode, Decode, Eq, PartialEq, Clone, Debug)]
 pub struct CredentialSet<Credential>(BTreeSet<Credential>);
diff --git a/runtime-modules/versioned-store-permissions/src/lib.rs b/runtime-modules/versioned-store-permissions/src/lib.rs
index 69ba3d50f2..8dbcfa07c4 100755
--- a/runtime-modules/versioned-store-permissions/src/lib.rs
+++ b/runtime-modules/versioned-store-permissions/src/lib.rs
@@ -2,10 +2,14 @@
 #![cfg_attr(not(feature = "std"), no_std)]
 
 use codec::Codec;
+use frame_support::{decl_module, decl_storage, ensure, Parameter};
 use rstd::collections::btree_map::BTreeMap;
-use rstd::prelude::*;
-use runtime_primitives::traits::{MaybeSerialize, Member, SimpleArithmetic};
-use srml_support::{decl_module, decl_storage, dispatch, ensure, Parameter};
+use sp_arithmetic::traits::BaseArithmetic;
+use sp_runtime::traits::{MaybeSerialize, Member};
+
+//TODO: Convert errors to the Substrate decl_error! macro.
+/// Result with string error message. This exists for backward compatibility purpose.
+pub type DispatchResult = Result<(), &'static str>;
 
 // EntityId, ClassId -> should be configured on versioned_store::Trait
 pub use versioned_store::{ClassId, ClassPropertyValue, EntityId, Property, PropertyValue};
@@ -60,13 +64,10 @@ pub type ClassPermissionsType<T> =
     ClassPermissions<ClassId, <T as Trait>::Credential, u16, <T as system::Trait>::BlockNumber>;
 
 pub trait Trait: system::Trait + versioned_store::Trait {
-    // type Event: ...
-    // Do we need Events?
-
     /// Type that represents an actor or group of actors in the system.
     type Credential: Parameter
         + Member
-        + SimpleArithmetic
+        + BaseArithmetic
         + Codec
         + Default
         + Copy
@@ -86,10 +87,12 @@ pub trait Trait: system::Trait + versioned_store::Trait {
 decl_storage! {
     trait Store for Module<T: Trait> as VersionedStorePermissions {
       /// ClassPermissions of corresponding Classes in the versioned store
-      pub ClassPermissionsByClassId get(class_permissions_by_class_id): linked_map ClassId => ClassPermissionsType<T>;
+      pub ClassPermissionsByClassId get(fn class_permissions_by_class_id): map hasher(blake2_128_concat)
+        ClassId => ClassPermissionsType<T>;
 
       /// Owner of an entity in the versioned store. If it is None then it is owned by the system.
-      pub EntityMaintainerByEntityId get(entity_maintainer_by_entity_id): linked_map EntityId => Option<T::Credential>;
+      pub EntityMaintainerByEntityId get(fn entity_maintainer_by_entity_id): map hasher(blake2_128_concat)
+        EntityId => Option<T::Credential>;
     }
 }
 
@@ -97,11 +100,12 @@ decl_module! {
     pub struct Module<T: Trait> for enum Call where origin: T::Origin {
 
         /// Sets the admins for a class
+        #[weight = 10_000_000] // TODO: adjust weight
         fn set_class_admins(
             origin,
             class_id: ClassId,
             admins: CredentialSet<T::Credential>
-        ) -> dispatch::Result {
+        ) -> DispatchResult {
             let raw_origin = Self::ensure_root_or_signed(origin)?;
 
             Self::mutate_class_permissions(
@@ -117,13 +121,13 @@ decl_module! {
         }
 
         // Methods for updating concrete permissions
-
+        #[weight = 10_000_000] // TODO: adjust weight
         fn set_class_entity_permissions(
             origin,
             with_credential: Option<T::Credential>,
             class_id: ClassId,
             entity_permissions: EntityPermissions<T::Credential>
-        ) -> dispatch::Result {
+        ) -> DispatchResult {
             let raw_origin = Self::ensure_root_or_signed(origin)?;
 
             Self::mutate_class_permissions(
@@ -138,12 +142,13 @@ decl_module! {
             )
         }
 
+        #[weight = 10_000_000] // TODO: adjust weight
         fn set_class_entities_can_be_created(
             origin,
             with_credential: Option<T::Credential>,
             class_id: ClassId,
             can_be_created: bool
-        ) -> dispatch::Result {
+        ) -> DispatchResult {
             let raw_origin = Self::ensure_root_or_signed(origin)?;
 
             Self::mutate_class_permissions(
@@ -158,12 +163,13 @@ decl_module! {
             )
         }
 
+        #[weight = 10_000_000] // TODO: adjust weight
         fn set_class_add_schemas_set(
             origin,
             with_credential: Option<T::Credential>,
             class_id: ClassId,
             credential_set: CredentialSet<T::Credential>
-        ) -> dispatch::Result {
+        ) -> DispatchResult {
             let raw_origin = Self::ensure_root_or_signed(origin)?;
 
             Self::mutate_class_permissions(
@@ -178,12 +184,13 @@ decl_module! {
             )
         }
 
+        #[weight = 10_000_000] // TODO: adjust weight
         fn set_class_create_entities_set(
             origin,
             with_credential: Option<T::Credential>,
             class_id: ClassId,
             credential_set: CredentialSet<T::Credential>
-        ) -> dispatch::Result {
+        ) -> DispatchResult {
             let raw_origin = Self::ensure_root_or_signed(origin)?;
 
             Self::mutate_class_permissions(
@@ -198,12 +205,13 @@ decl_module! {
             )
         }
 
+        #[weight = 10_000_000] // TODO: adjust weight
         fn set_class_reference_constraint(
             origin,
             with_credential: Option<T::Credential>,
             class_id: ClassId,
             constraint: ReferenceConstraint<ClassId, u16>
-        ) -> dispatch::Result {
+        ) -> DispatchResult {
             let raw_origin = Self::ensure_root_or_signed(origin)?;
 
             Self::mutate_class_permissions(
@@ -224,7 +232,7 @@ decl_module! {
         //     origin,
         //     entity_id: EntityId,
         //     new_maintainer: Option<T::Credential>
-        // ) -> dispatch::Result {
+        // ) -> DispatchResult {
         //     ensure_root(origin)?;
 
         //     // ensure entity exists in the versioned store
@@ -238,13 +246,13 @@ decl_module! {
         // }
 
         // Permissioned proxy calls to versioned store
-
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn create_class(
             origin,
             name: Vec<u8>,
             description: Vec<u8>,
             class_permissions: ClassPermissionsType<T>
-        ) -> dispatch::Result {
+        ) -> DispatchResult {
             let raw_origin = Self::ensure_root_or_signed(origin)?;
 
             let can_create_class = match raw_origin {
@@ -268,21 +276,23 @@ decl_module! {
             }
         }
 
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn create_class_with_default_permissions(
             origin,
             name: Vec<u8>,
             description: Vec<u8>
-        ) -> dispatch::Result {
+        ) -> DispatchResult {
             Self::create_class(origin, name, description, ClassPermissions::default())
         }
 
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn add_class_schema(
             origin,
             with_credential: Option<T::Credential>,
             class_id: ClassId,
             existing_properties: Vec<u16>,
             new_properties: Vec<Property>
-        ) -> dispatch::Result {
+        ) -> DispatchResult {
             let raw_origin = Self::ensure_root_or_signed(origin)?;
 
             Self::if_class_permissions_satisfied(
@@ -304,16 +314,18 @@ decl_module! {
 
         /// Creates a new entity of type class_id. The maintainer is set to be either None if the origin is root, or the provided credential
         /// associated with signer.
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn create_entity(
             origin,
             with_credential: Option<T::Credential>,
             class_id: ClassId
-        ) -> dispatch::Result {
+        ) -> DispatchResult {
             let raw_origin = Self::ensure_root_or_signed(origin)?;
             let _entity_id = Self::do_create_entity(&raw_origin, with_credential, class_id)?;
             Ok(())
         }
 
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn add_schema_support_to_entity(
             origin,
             with_credential: Option<T::Credential>,
@@ -321,23 +333,25 @@ decl_module! {
             entity_id: EntityId,
             schema_id: u16, // Do not type alias u16!! - u16,
             property_values: Vec<ClassPropertyValue>
-        ) -> dispatch::Result {
+        ) -> DispatchResult {
             let raw_origin = Self::ensure_root_or_signed(origin)?;
             Self::do_add_schema_support_to_entity(&raw_origin, with_credential, as_entity_maintainer, entity_id, schema_id, property_values)
         }
 
+        #[weight = 10_000_000] // TODO: adjust weight
         pub fn update_entity_property_values(
             origin,
             with_credential: Option<T::Credential>,
             as_entity_maintainer: bool,
             entity_id: EntityId,
             property_values: Vec<ClassPropertyValue>
-        ) -> dispatch::Result {
+        ) -> DispatchResult {
             let raw_origin = Self::ensure_root_or_signed(origin)?;
             Self::do_update_entity_property_values(&raw_origin, with_credential, as_entity_maintainer, entity_id, property_values)
         }
 
-        pub fn transaction(origin, operations: Vec<Operation<T::Credential>>) -> dispatch::Result {
+        #[weight = 10_000_000] // TODO: adjust weight
+        pub fn transaction(origin, operations: Vec<Operation<T::Credential>>) -> DispatchResult {
             // This map holds the EntityId of the entity created as a result of executing a CreateEntity Operation
             // keyed by the indexed of the operation, in the operations vector.
             let mut entity_created_in_operation: BTreeMap<usize, EntityId> = BTreeMap::new();
@@ -415,7 +429,7 @@ impl<T: Trait> Module<T> {
         as_entity_maintainer: bool,
         entity_id: EntityId,
         property_values: Vec<ClassPropertyValue>,
-    ) -> dispatch::Result {
+    ) -> DispatchResult {
         let class_id = Self::get_class_id_by_entity_id(entity_id)?;
 
         Self::ensure_internal_property_values_permitted(class_id, &property_values)?;
@@ -448,7 +462,7 @@ impl<T: Trait> Module<T> {
         entity_id: EntityId,
         schema_id: u16,
         property_values: Vec<ClassPropertyValue>,
-    ) -> dispatch::Result {
+    ) -> DispatchResult {
         // class id of the entity being updated
         let class_id = Self::get_class_id_by_entity_id(entity_id)?;
 
@@ -491,7 +505,7 @@ impl<T: Trait> Module<T> {
                         if let Some(entity_id) = as_entity_maintainer {
                             // is entity maintained by system
                             ensure!(
-                                <EntityMaintainerByEntityId<T>>::exists(entity_id),
+                                <EntityMaintainerByEntityId<T>>::contains_key(entity_id),
                                 "NotEnityMaintainer"
                             );
                             // ensure entity maintainer matches
@@ -522,7 +536,7 @@ impl<T: Trait> Module<T> {
         class_id: ClassId,
     ) -> Result<ClassPermissionsType<T>, &'static str> {
         ensure!(
-            <ClassPermissionsByClassId<T>>::exists(class_id),
+            <ClassPermissionsByClassId<T>>::contains_key(class_id),
             "ClassPermissionsNotFoundByClassId"
         );
         Ok(Self::class_permissions_by_class_id(class_id))
@@ -539,11 +553,10 @@ impl<T: Trait> Module<T> {
         class_id: ClassId,
         // actual mutation to apply.
         mutate: Mutate,
-    ) -> dispatch::Result
+    ) -> DispatchResult
     where
-        Predicate:
-            FnOnce(&ClassPermissionsType<T>, &AccessLevel<T::Credential>) -> dispatch::Result,
-        Mutate: FnOnce(&mut ClassPermissionsType<T>) -> dispatch::Result,
+        Predicate: FnOnce(&ClassPermissionsType<T>, &AccessLevel<T::Credential>) -> DispatchResult,
+        Mutate: FnOnce(&mut ClassPermissionsType<T>) -> DispatchResult,
     {
         let access_level = Self::derive_access_level(raw_origin, with_credential, None)?;
         let mut class_permissions = Self::ensure_class_permissions(class_id)?;
@@ -558,7 +571,7 @@ impl<T: Trait> Module<T> {
     fn is_system(
         _: &ClassPermissionsType<T>,
         access_level: &AccessLevel<T::Credential>,
-    ) -> dispatch::Result {
+    ) -> DispatchResult {
         if *access_level == AccessLevel::System {
             Ok(())
         } else {
@@ -581,8 +594,7 @@ impl<T: Trait> Module<T> {
         callback: Callback,
     ) -> Result<R, &'static str>
     where
-        Predicate:
-            FnOnce(&ClassPermissionsType<T>, &AccessLevel<T::Credential>) -> dispatch::Result,
+        Predicate: FnOnce(&ClassPermissionsType<T>, &AccessLevel<T::Credential>) -> DispatchResult,
         Callback: FnOnce(
             &ClassPermissionsType<T>,
             &AccessLevel<T::Credential>,
@@ -599,7 +611,7 @@ impl<T: Trait> Module<T> {
     fn get_class_id_by_entity_id(entity_id: EntityId) -> Result<ClassId, &'static str> {
         // use a utility method on versioned_store module
         ensure!(
-            versioned_store::EntityById::exists(entity_id),
+            versioned_store::EntityById::contains_key(entity_id),
             "EntityNotFound"
         );
         let entity = <versioned_store::Module<T>>::entity_by_id(entity_id);
@@ -611,7 +623,7 @@ impl<T: Trait> Module<T> {
     fn ensure_internal_property_values_permitted(
         source_class_id: ClassId,
         property_values: &[ClassPropertyValue],
-    ) -> dispatch::Result {
+    ) -> DispatchResult {
         for property_value in property_values.iter() {
             if let PropertyValue::Internal(ref target_entity_id) = property_value.value {
                 // get the class permissions for target class
diff --git a/runtime-modules/versioned-store-permissions/src/mock.rs b/runtime-modules/versioned-store-permissions/src/mock.rs
index 750bc16ee7..7ff0c4b840 100644
--- a/runtime-modules/versioned-store-permissions/src/mock.rs
+++ b/runtime-modules/versioned-store-permissions/src/mock.rs
@@ -3,13 +3,13 @@
 use crate::*;
 use crate::{Module, Trait};
 
-use primitives::H256;
-use runtime_primitives::{
+use frame_support::{impl_outer_origin, parameter_types};
+use sp_core::H256;
+use sp_runtime::{
     testing::Header,
     traits::{BlakeTwo256, IdentityLookup},
     Perbill,
 };
-use srml_support::{impl_outer_origin, parameter_types};
 use versioned_store::InputValidationLengthConstraint;
 
 impl_outer_origin! {
@@ -28,10 +28,11 @@ parameter_types! {
 }
 
 impl system::Trait for Runtime {
+    type BaseCallFilter = ();
     type Origin = Origin;
+    type Call = ();
     type Index = u64;
     type BlockNumber = u64;
-    type Call = ();
     type Hash = H256;
     type Hashing = BlakeTwo256;
     type AccountId = u64;
@@ -40,9 +41,17 @@ impl system::Trait for Runtime {
     type Event = ();
     type BlockHashCount = BlockHashCount;
     type MaximumBlockWeight = MaximumBlockWeight;
+    type DbWeight = ();
+    type BlockExecutionWeight = ();
+    type ExtrinsicBaseWeight = ();
+    type MaximumExtrinsicWeight = ();
     type MaximumBlockLength = MaximumBlockLength;
     type AvailableBlockRatio = AvailableBlockRatio;
     type Version = ();
+    type ModuleToIndex = ();
+    type AccountData = ();
+    type OnNewAccount = ();
+    type OnKilledAccount = ();
 }
 
 impl timestamp::Trait for Runtime {
@@ -141,9 +150,7 @@ fn default_versioned_store_genesis_config() -> versioned_store::GenesisConfig {
     }
 }
 
-fn build_test_externalities(
-    config: versioned_store::GenesisConfig,
-) -> runtime_io::TestExternalities {
+fn build_test_externalities(config: versioned_store::GenesisConfig) -> sp_io::TestExternalities {
     let mut t = system::GenesisConfig::default()
         .build_storage::<Runtime>()
         .unwrap();
diff --git a/runtime-modules/versioned-store-permissions/src/operations.rs b/runtime-modules/versioned-store-permissions/src/operations.rs
index db020125df..88b28b9fde 100644
--- a/runtime-modules/versioned-store-permissions/src/operations.rs
+++ b/runtime-modules/versioned-store-permissions/src/operations.rs
@@ -1,6 +1,5 @@
 use codec::{Decode, Encode};
 use rstd::collections::btree_map::BTreeMap;
-use rstd::prelude::*;
 use versioned_store::{ClassId, ClassPropertyValue, EntityId, PropertyValue};
 
 #[derive(Encode, Decode, Eq, PartialEq, Clone, Debug)]
diff --git a/runtime-modules/versioned-store-permissions/src/permissions.rs b/runtime-modules/versioned-store-permissions/src/permissions.rs
index 3d0c3759d6..33afde168f 100644
--- a/runtime-modules/versioned-store-permissions/src/permissions.rs
+++ b/runtime-modules/versioned-store-permissions/src/permissions.rs
@@ -1,8 +1,8 @@
 use codec::{Decode, Encode};
-use srml_support::dispatch;
 
 use crate::constraint::*;
 use crate::credentials::*;
+use crate::DispatchResult;
 
 /// Permissions for an instance of a Class in the versioned store.
 #[derive(Encode, Decode, Default, Eq, PartialEq, Clone, Debug)]
@@ -48,7 +48,7 @@ where
     pub fn is_admin(
         class_permissions: &Self,
         access_level: &AccessLevel<Credential>,
-    ) -> dispatch::Result {
+    ) -> DispatchResult {
         match access_level {
             AccessLevel::System => Ok(()),
             AccessLevel::Credential(credential) => {
@@ -66,7 +66,7 @@ where
     pub fn can_add_class_schema(
         class_permissions: &Self,
         access_level: &AccessLevel<Credential>,
-    ) -> dispatch::Result {
+    ) -> DispatchResult {
         match access_level {
             AccessLevel::System => Ok(()),
             AccessLevel::Credential(credential) => {
@@ -84,7 +84,7 @@ where
     pub fn can_create_entity(
         class_permissions: &Self,
         access_level: &AccessLevel<Credential>,
-    ) -> dispatch::Result {
+    ) -> DispatchResult {
         match access_level {
             AccessLevel::System => Ok(()),
             AccessLevel::Credential(credential) => {
@@ -104,7 +104,7 @@ where
     pub fn can_update_entity(
         class_permissions: &Self,
         access_level: &AccessLevel<Credential>,
-    ) -> dispatch::Result {
+    ) -> DispatchResult {
         match access_level {
             AccessLevel::System => Ok(()),
             AccessLevel::Credential(credential) => {
diff --git a/runtime-modules/versioned-store-permissions/src/tests.rs b/runtime-modules/versioned-store-permissions/src/tests.rs
index 07b5fb54ad..6e785f7523 100644
--- a/runtime-modules/versioned-store-permissions/src/tests.rs
+++ b/runtime-modules/versioned-store-permissions/src/tests.rs
@@ -5,7 +5,7 @@ use crate::mock::*;
 use rstd::collections::btree_set::BTreeSet;
 use versioned_store::PropertyType;
 
-use srml_support::{assert_err, assert_ok};
+use frame_support::{assert_err, assert_ok};
 
 fn simple_test_schema() -> Vec<Property> {
     vec![Property {
@@ -77,7 +77,7 @@ fn create_class_then_entity_with_default_class_permissions() {
 
         let class_id = create_simple_class_with_default_permissions();
 
-        assert!(<ClassPermissionsByClassId<Runtime>>::exists(class_id));
+        assert!(<ClassPermissionsByClassId<Runtime>>::contains_key(class_id));
 
         // default class permissions have empty add_schema acl
         assert_err!(
@@ -94,7 +94,7 @@ fn create_class_then_entity_with_default_class_permissions() {
         // give members of GROUP_ZERO permission to add schemas
         let add_schema_set = CredentialSet::from(vec![0]);
         assert_ok!(Permissions::set_class_add_schemas_set(
-            Origin::ROOT,
+            system::RawOrigin::Root.into(),
             None,
             class_id,
             add_schema_set
@@ -111,9 +111,15 @@ fn create_class_then_entity_with_default_class_permissions() {
 
         // System can always create entities (provided class exists) bypassing any permissions
         let entity_id_1 = next_entity_id();
-        assert_ok!(Permissions::create_entity(Origin::ROOT, None, class_id,));
+        assert_ok!(Permissions::create_entity(
+            system::RawOrigin::Root.into(),
+            None,
+            class_id,
+        ));
         // entities created by system are "un-owned"
-        assert!(!<EntityMaintainerByEntityId<Runtime>>::exists(entity_id_1));
+        assert!(!<EntityMaintainerByEntityId<Runtime>>::contains_key(
+            entity_id_1
+        ));
         assert_eq!(
             Permissions::entity_maintainer_by_entity_id(entity_id_1),
             None
@@ -130,7 +136,7 @@ fn create_class_then_entity_with_default_class_permissions() {
         );
 
         assert_ok!(Permissions::set_class_entities_can_be_created(
-            Origin::ROOT,
+            system::RawOrigin::Root.into(),
             None,
             class_id,
             true
@@ -148,7 +154,7 @@ fn create_class_then_entity_with_default_class_permissions() {
         // give members of GROUP_ONE permission to create entities
         let create_entities_set = CredentialSet::from(vec![1]);
         assert_ok!(Permissions::set_class_create_entities_set(
-            Origin::ROOT,
+            system::RawOrigin::Root.into(),
             None,
             class_id,
             create_entities_set
@@ -160,7 +166,9 @@ fn create_class_then_entity_with_default_class_permissions() {
             Some(1),
             class_id,
         ));
-        assert!(<EntityMaintainerByEntityId<Runtime>>::exists(entity_id_2));
+        assert!(<EntityMaintainerByEntityId<Runtime>>::contains_key(
+            entity_id_2
+        ));
         assert_eq!(
             Permissions::entity_maintainer_by_entity_id(entity_id_2),
             Some(1)
@@ -216,7 +224,7 @@ fn class_permissions_set_admins() {
         );
         assert_err!(
             Permissions::set_class_admins(
-                Origin::NONE, //unsigned inherent?
+                system::RawOrigin::None.into(), //unsigned inherent?
                 class_id,
                 credential_set.clone()
             ),
@@ -225,7 +233,7 @@ fn class_permissions_set_admins() {
 
         // root origin can set admins
         assert_ok!(Permissions::set_class_admins(
-            Origin::ROOT,
+            system::RawOrigin::Root.into(),
             class_id,
             credential_set.clone()
         ));
@@ -250,7 +258,7 @@ fn class_permissions_set_add_schemas_set() {
 
         // root
         assert_ok!(Permissions::set_class_add_schemas_set(
-            Origin::ROOT,
+            system::RawOrigin::Root.into(),
             None,
             class_id,
             credential_set1.clone()
@@ -296,7 +304,7 @@ fn class_permissions_set_class_create_entities_set() {
 
         // root
         assert_ok!(Permissions::set_class_create_entities_set(
-            Origin::ROOT,
+            system::RawOrigin::Root.into(),
             None,
             class_id,
             credential_set1.clone()
@@ -339,7 +347,7 @@ fn class_permissions_set_class_entities_can_be_created() {
 
         // root
         assert_ok!(Permissions::set_class_entities_can_be_created(
-            Origin::ROOT,
+            system::RawOrigin::Root.into(),
             None,
             class_id,
             true
@@ -387,7 +395,7 @@ fn class_permissions_set_class_entity_permissions() {
 
         //root
         assert_ok!(Permissions::set_class_entity_permissions(
-            Origin::ROOT,
+            system::RawOrigin::Root.into(),
             None,
             class_id,
             entity_permissions1.clone()
@@ -441,7 +449,7 @@ fn class_permissions_set_class_reference_constraint() {
 
         //root
         assert_ok!(Permissions::set_class_reference_constraint(
-            Origin::ROOT,
+            system::RawOrigin::Root.into(),
             None,
             class_id,
             reference_constraint1.clone()
@@ -505,7 +513,7 @@ fn batch_transaction_simple() {
         }];
 
         assert_ok!(Permissions::add_class_schema(
-            Origin::ROOT,
+            system::RawOrigin::Root.into(),
             None,
             new_class_id,
             vec![],
@@ -564,8 +572,8 @@ fn batch_transaction_simple() {
         ));
 
         // two entities created
-        assert!(versioned_store::EntityById::exists(entity_id));
-        assert!(versioned_store::EntityById::exists(entity_id + 1));
+        assert!(versioned_store::EntityById::contains_key(entity_id));
+        assert!(versioned_store::EntityById::contains_key(entity_id + 1));
     })
 }
 
@@ -589,7 +597,7 @@ fn batch_transaction_vector_of_entities() {
         }];
 
         assert_ok!(Permissions::add_class_schema(
-            Origin::ROOT,
+            system::RawOrigin::Root.into(),
             None,
             new_class_id,
             vec![],
@@ -645,9 +653,9 @@ fn batch_transaction_vector_of_entities() {
         ));
 
         // three entities created
-        assert!(versioned_store::EntityById::exists(entity_id));
-        assert!(versioned_store::EntityById::exists(entity_id + 1));
-        assert!(versioned_store::EntityById::exists(entity_id + 2));
+        assert!(versioned_store::EntityById::contains_key(entity_id));
+        assert!(versioned_store::EntityById::contains_key(entity_id + 1));
+        assert!(versioned_store::EntityById::contains_key(entity_id + 2));
 
         assert_eq!(
             versioned_store::EntityById::get(entity_id),
diff --git a/runtime-modules/versioned-store/Cargo.toml b/runtime-modules/versioned-store/Cargo.toml
index 3bae748ff9..71730a1cc3 100755
--- a/runtime-modules/versioned-store/Cargo.toml
+++ b/runtime-modules/versioned-store/Cargo.toml
@@ -1,50 +1,29 @@
 [package]
-name = 'substrate-versioned-store'
-version = '1.0.1'
+name = 'pallet-versioned-store'
+version = '3.0.0'
 authors = ['Joystream contributors']
 edition = '2018'
 
 [dependencies]
-hex-literal = '0.1.0'
-serde = { version = '1.0', optional = true }
-serde_derive = { version = '1.0', optional = true }
-rstd = { package = 'sr-std', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-runtime-primitives = { package = 'sr-primitives', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-srml-support = { package = 'srml-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-srml-support-procedural = { package = 'srml-support-procedural', git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-system = { package = 'srml-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-balances = { package = 'srml-balances', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-codec = { package = 'parity-scale-codec', version = '1.0.0', default-features = false, features = ['derive'] }
-# https://users.rust-lang.org/t/failure-derive-compilation-error/39062
-quote = '<=1.0.2'
-
-[dependencies.timestamp]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'srml-timestamp'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
-
-[dependencies.runtime-io]
-default_features = false
-git = 'https://github.com/paritytech/substrate.git'
-package = 'sr-io'
-rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'
+serde = { version = "1.0.101", optional = true, features = ["derive"] }
+codec = { package = 'parity-scale-codec', version = '1.3.1', default-features = false, features = ['derive'] }
+rstd = { package = 'sp-std', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+frame-support = { package = 'frame-support', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+system = { package = 'frame-system', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
 
 [dev-dependencies]
-runtime-io = { package = 'sr-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
-primitives = { package = 'substrate-primitives', git = 'https://github.com/paritytech/substrate.git', rev = 'c37bb08535c49a12320af7facfd555ce05cce2e8'}
+sp-runtime = { package = 'sp-runtime', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-io = { package = 'sp-io', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+sp-core = { package = 'sp-core', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+timestamp = { package = 'pallet-timestamp', default-features = false, git = 'https://github.com/paritytech/substrate.git', rev = '00768a1f21a579c478fe5d4f51e1fa71f7db9fd4'}
+
 
 [features]
 default = ['std']
 std = [
 	'serde',
-	'serde_derive',
 	'codec/std',
 	'rstd/std',
-	'runtime-io/std',
-	'runtime-primitives/std',
-	'srml-support/std',
+	'frame-support/std',
 	'system/std',
-	'balances/std',
-	'timestamp/std',
-]
+]
\ No newline at end of file
diff --git a/runtime-modules/versioned-store/src/example.rs b/runtime-modules/versioned-store/src/example.rs
index 032d5ff4ab..98fc705f5c 100644
--- a/runtime-modules/versioned-store/src/example.rs
+++ b/runtime-modules/versioned-store/src/example.rs
@@ -3,7 +3,7 @@
 use super::*;
 use crate::mock::*;
 
-use srml_support::assert_ok;
+use frame_support::assert_ok;
 
 /// This example uses Class, Properties, Schema and Entity structures
 /// to describe the Staked podcast channel and its second episode.
diff --git a/runtime-modules/versioned-store/src/lib.rs b/runtime-modules/versioned-store/src/lib.rs
index 310750080e..9d76e9928c 100755
--- a/runtime-modules/versioned-store/src/lib.rs
+++ b/runtime-modules/versioned-store/src/lib.rs
@@ -12,17 +12,20 @@
 #![cfg_attr(not(feature = "std"), no_std)]
 
 #[cfg(feature = "std")]
-use serde_derive::{Deserialize, Serialize};
+use serde::{Deserialize, Serialize};
 
 use codec::{Decode, Encode};
+use frame_support::{decl_event, decl_module, decl_storage, ensure};
 use rstd::collections::btree_set::BTreeSet;
-use rstd::prelude::*;
-use srml_support::{decl_event, decl_module, decl_storage, dispatch, ensure};
 
 mod example;
 mod mock;
 mod tests;
 
+//TODO: Convert errors to the Substrate decl_error! macro.
+/// Result with string error message. This exists for backward compatibility purpose.
+pub type DispatchResult = Result<(), &'static str>;
+
 // Validation errors
 // --------------------------------------
 
@@ -135,7 +138,6 @@ pub struct Entity {
     /// Values for properties on class that are used by some schema used by this entity!
     /// Length is no more than Class.properties.
     pub values: Vec<ClassPropertyValue>,
-    // pub deleted: bool,
 }
 
 /// A schema defines what properties describe an entity
@@ -253,24 +255,24 @@ decl_storage! {
 
     trait Store for Module<T: Trait> as VersionedStore {
 
-        pub ClassById get(class_by_id) config(): map ClassId => Class;
+        pub ClassById get(fn class_by_id) config(): map hasher(blake2_128_concat) ClassId => Class;
 
-        pub EntityById get(entity_by_id) config(): map EntityId => Entity;
+        pub EntityById get(fn entity_by_id) config(): map hasher(blake2_128_concat) EntityId => Entity;
 
-        pub NextClassId get(next_class_id) config(): ClassId;
+        pub NextClassId get(fn next_class_id) config(): ClassId;
 
-        pub NextEntityId get(next_entity_id) config(): EntityId;
+        pub NextEntityId get(fn next_entity_id) config(): EntityId;
 
-        pub PropertyNameConstraint get(property_name_constraint)
+        pub PropertyNameConstraint get(fn property_name_constraint)
             config(): InputValidationLengthConstraint;
 
-        pub PropertyDescriptionConstraint get(property_description_constraint)
+        pub PropertyDescriptionConstraint get(fn property_description_constraint)
             config(): InputValidationLengthConstraint;
 
-        pub ClassNameConstraint get(class_name_constraint)
+        pub ClassNameConstraint get(fn class_name_constraint)
             config(): InputValidationLengthConstraint;
 
-        pub ClassDescriptionConstraint get(class_description_constraint)
+        pub ClassDescriptionConstraint get(fn class_description_constraint)
             config(): InputValidationLengthConstraint;
     }
 }
@@ -375,7 +377,7 @@ impl<T: Trait> Module<T> {
 
         // Check validity of Internal(ClassId) for new_properties.
         let has_unknown_internal_id = new_properties.iter().any(|prop| match prop.prop_type {
-            PropertyType::Internal(other_class_id) => !ClassById::exists(other_class_id),
+            PropertyType::Internal(other_class_id) => !ClassById::contains_key(other_class_id),
             _ => false,
         });
         ensure!(
@@ -434,7 +436,7 @@ impl<T: Trait> Module<T> {
         entity_id: EntityId,
         schema_id: u16,
         property_values: Vec<ClassPropertyValue>,
-    ) -> dispatch::Result {
+    ) -> DispatchResult {
         Self::ensure_known_entity_id(entity_id)?;
 
         let (entity, class) = Self::get_entity_and_class(entity_id);
@@ -521,7 +523,7 @@ impl<T: Trait> Module<T> {
     pub fn update_entity_property_values(
         entity_id: EntityId,
         new_property_values: Vec<ClassPropertyValue>,
-    ) -> dispatch::Result {
+    ) -> DispatchResult {
         Self::ensure_known_entity_id(entity_id)?;
 
         let (entity, class) = Self::get_entity_and_class(entity_id);
@@ -580,7 +582,7 @@ impl<T: Trait> Module<T> {
     }
 
     // Commented out for now <- requested by Bedeho.
-    // pub fn delete_entity(entity_id: EntityId) -> dispatch::Result {
+    // pub fn delete_entity(entity_id: EntityId) -> DispatchResult {
     //     Self::ensure_known_entity_id(entity_id)?;
 
     //     let is_deleted = EntityById::get(entity_id).deleted;
@@ -597,17 +599,17 @@ impl<T: Trait> Module<T> {
     // Helper functions:
     // ----------------------------------------------------------------
 
-    pub fn ensure_known_class_id(class_id: ClassId) -> dispatch::Result {
-        ensure!(ClassById::exists(class_id), ERROR_CLASS_NOT_FOUND);
+    pub fn ensure_known_class_id(class_id: ClassId) -> DispatchResult {
+        ensure!(ClassById::contains_key(class_id), ERROR_CLASS_NOT_FOUND);
         Ok(())
     }
 
-    pub fn ensure_known_entity_id(entity_id: EntityId) -> dispatch::Result {
-        ensure!(EntityById::exists(entity_id), ERROR_ENTITY_NOT_FOUND);
+    pub fn ensure_known_entity_id(entity_id: EntityId) -> DispatchResult {
+        ensure!(EntityById::contains_key(entity_id), ERROR_ENTITY_NOT_FOUND);
         Ok(())
     }
 
-    pub fn ensure_valid_internal_prop(value: PropertyValue, prop: Property) -> dispatch::Result {
+    pub fn ensure_valid_internal_prop(value: PropertyValue, prop: Property) -> DispatchResult {
         match (value, prop.prop_type) {
             (PV::Internal(entity_id), PT::Internal(class_id)) => {
                 Self::ensure_known_class_id(class_id)?;
@@ -625,7 +627,7 @@ impl<T: Trait> Module<T> {
 
     pub fn is_unknown_internal_entity_id(id: PropertyValue) -> bool {
         if let PropertyValue::Internal(entity_id) = id {
-            !EntityById::exists(entity_id)
+            !EntityById::contains_key(entity_id)
         } else {
             false
         }
@@ -637,10 +639,7 @@ impl<T: Trait> Module<T> {
         (entity, class)
     }
 
-    pub fn ensure_property_value_is_valid(
-        value: PropertyValue,
-        prop: Property,
-    ) -> dispatch::Result {
+    pub fn ensure_property_value_is_valid(value: PropertyValue, prop: Property) -> DispatchResult {
         Self::ensure_prop_value_matches_its_type(value.clone(), prop.clone())?;
         Self::ensure_valid_internal_prop(value.clone(), prop.clone())?;
         Self::validate_max_len_if_text_prop(value.clone(), prop.clone())?;
@@ -648,14 +647,14 @@ impl<T: Trait> Module<T> {
         Ok(())
     }
 
-    pub fn validate_max_len_if_text_prop(value: PropertyValue, prop: Property) -> dispatch::Result {
+    pub fn validate_max_len_if_text_prop(value: PropertyValue, prop: Property) -> DispatchResult {
         match (value, prop.prop_type) {
             (PV::Text(text), PT::Text(max_len)) => Self::validate_max_len_of_text(text, max_len),
             _ => Ok(()),
         }
     }
 
-    pub fn validate_max_len_of_text(text: Vec<u8>, max_len: u16) -> dispatch::Result {
+    pub fn validate_max_len_of_text(text: Vec<u8>, max_len: u16) -> DispatchResult {
         if text.len() <= max_len as usize {
             Ok(())
         } else {
@@ -667,7 +666,7 @@ impl<T: Trait> Module<T> {
     pub fn validate_max_len_if_vec_prop(
         value: PropertyValue,
         prop: Property,
-    ) -> dispatch::Result {
+    ) -> DispatchResult {
 
         fn validate_vec_len<T>(vec: Vec<T>, max_len: u16) -> bool {
             vec.len() <= max_len as usize
@@ -724,7 +723,7 @@ impl<T: Trait> Module<T> {
     pub fn ensure_prop_value_matches_its_type(
         value: PropertyValue,
         prop: Property,
-    ) -> dispatch::Result {
+    ) -> DispatchResult {
         if Self::does_prop_value_match_type(value, prop) {
             Ok(())
         } else {
@@ -774,7 +773,7 @@ impl<T: Trait> Module<T> {
         }
     }
 
-    pub fn ensure_property_name_is_valid(text: &[u8]) -> dispatch::Result {
+    pub fn ensure_property_name_is_valid(text: &[u8]) -> DispatchResult {
         PropertyNameConstraint::get().ensure_valid(
             text.len(),
             ERROR_PROPERTY_NAME_TOO_SHORT,
@@ -782,7 +781,7 @@ impl<T: Trait> Module<T> {
         )
     }
 
-    pub fn ensure_property_description_is_valid(text: &[u8]) -> dispatch::Result {
+    pub fn ensure_property_description_is_valid(text: &[u8]) -> DispatchResult {
         PropertyDescriptionConstraint::get().ensure_valid(
             text.len(),
             ERROR_PROPERTY_DESCRIPTION_TOO_SHORT,
@@ -790,7 +789,7 @@ impl<T: Trait> Module<T> {
         )
     }
 
-    pub fn ensure_class_name_is_valid(text: &[u8]) -> dispatch::Result {
+    pub fn ensure_class_name_is_valid(text: &[u8]) -> DispatchResult {
         ClassNameConstraint::get().ensure_valid(
             text.len(),
             ERROR_CLASS_NAME_TOO_SHORT,
@@ -798,7 +797,7 @@ impl<T: Trait> Module<T> {
         )
     }
 
-    pub fn ensure_class_description_is_valid(text: &[u8]) -> dispatch::Result {
+    pub fn ensure_class_description_is_valid(text: &[u8]) -> DispatchResult {
         ClassDescriptionConstraint::get().ensure_valid(
             text.len(),
             ERROR_CLASS_DESCRIPTION_TOO_SHORT,
diff --git a/runtime-modules/versioned-store/src/mock.rs b/runtime-modules/versioned-store/src/mock.rs
index 5bd79e3691..29fc62a307 100644
--- a/runtime-modules/versioned-store/src/mock.rs
+++ b/runtime-modules/versioned-store/src/mock.rs
@@ -3,13 +3,13 @@
 use crate::*;
 use crate::{GenesisConfig, Module, Trait};
 
-use primitives::H256;
-use runtime_primitives::{
+use frame_support::{assert_err, assert_ok, impl_outer_origin, parameter_types};
+use sp_core::H256;
+use sp_runtime::{
     testing::Header,
     traits::{BlakeTwo256, IdentityLookup},
     Perbill,
 };
-use srml_support::{assert_err, assert_ok, impl_outer_origin, parameter_types};
 
 impl_outer_origin! {
     pub enum Origin for Runtime {}
@@ -27,10 +27,11 @@ parameter_types! {
 }
 
 impl system::Trait for Runtime {
+    type BaseCallFilter = ();
     type Origin = Origin;
+    type Call = ();
     type Index = u64;
     type BlockNumber = u64;
-    type Call = ();
     type Hash = H256;
     type Hashing = BlakeTwo256;
     type AccountId = u64;
@@ -39,9 +40,17 @@ impl system::Trait for Runtime {
     type Event = ();
     type BlockHashCount = BlockHashCount;
     type MaximumBlockWeight = MaximumBlockWeight;
+    type DbWeight = ();
+    type BlockExecutionWeight = ();
+    type ExtrinsicBaseWeight = ();
+    type MaximumExtrinsicWeight = ();
     type MaximumBlockLength = MaximumBlockLength;
     type AvailableBlockRatio = AvailableBlockRatio;
     type Version = ();
+    type ModuleToIndex = ();
+    type AccountData = ();
+    type OnNewAccount = ();
+    type OnKilledAccount = ();
 }
 
 impl timestamp::Trait for Runtime {
@@ -60,15 +69,9 @@ pub const UNKNOWN_ENTITY_ID: EntityId = 222;
 
 pub const UNKNOWN_PROP_ID: u16 = 333;
 
-// pub const UNKNOWN_SCHEMA_ID: u16 = 444;
-
 pub const SCHEMA_ID_0: u16 = 0;
 pub const SCHEMA_ID_1: u16 = 1;
 
-// pub fn generate_text(len: usize) -> Vec<u8> {
-//     vec![b'x'; len]
-// }
-
 pub fn good_class_name() -> Vec<u8> {
     b"Name of a class".to_vec()
 }
@@ -206,7 +209,7 @@ pub fn assert_class_schemas(class_id: ClassId, expected_schema_prop_ids: Vec<Vec
     assert_eq!(class.schemas, schemas);
 }
 
-pub fn assert_entity_not_found(result: dispatch::Result) {
+pub fn assert_entity_not_found(result: crate::DispatchResult) {
     assert_err!(result, ERROR_ENTITY_NOT_FOUND);
 }
 
@@ -238,7 +241,7 @@ pub fn default_genesis_config() -> GenesisConfig {
     }
 }
 
-fn build_test_externalities(config: GenesisConfig) -> runtime_io::TestExternalities {
+fn build_test_externalities(config: GenesisConfig) -> sp_io::TestExternalities {
     let mut t = system::GenesisConfig::default()
         .build_storage::<Runtime>()
         .unwrap();
@@ -253,7 +256,5 @@ pub fn with_test_externalities<R, F: FnOnce() -> R>(f: F) -> R {
     build_test_externalities(config).execute_with(f)
 }
 
-// pub type System = system::Module;
-
 /// Export module on a test runtime
 pub type TestModule = Module<Runtime>;
diff --git a/runtime-modules/versioned-store/src/tests.rs b/runtime-modules/versioned-store/src/tests.rs
index 3e2fee162a..506f31007d 100644
--- a/runtime-modules/versioned-store/src/tests.rs
+++ b/runtime-modules/versioned-store/src/tests.rs
@@ -3,7 +3,7 @@
 use super::*;
 use crate::mock::*;
 
-use srml_support::{assert_err, assert_ok};
+use frame_support::{assert_err, assert_ok};
 
 // Create class
 // --------------------------------------