added ethereum address20 support

Cargo.toml

@@ -54,6 +54,7 @@ serde = { version = "1.0", default-features = false }
 serial_test = { version = "0.9.0", default-features = false }
 base64-url = { version =  "3.0.0", default-features = false }
 p256 = { version = "0.13.2", default-features = false, features = ["ecdsa"] }
+libsecp256k1 = { version = "0.7", default-features = false }
 
 # substrate pallets
 pallet-aura = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.13.0", default-features = false }
@@ -159,6 +160,7 @@ substrate-test-utils = { git = "https://github.com/paritytech/polkadot-sdk", bra
 
 substrate-frame-rpc-system = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.13.0" }
 substrate-prometheus-endpoint = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.13.0" }
+sp-debug-derive = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.13.0", default-features = false }
 
 [profile.release]
 panic = "unwind"

common/primitives/Cargo.toml

@@ -30,11 +30,14 @@ sp-std = { workspace = true }
 numtoa = { workspace = true }
 sp-externalities = { workspace = true }
 sp-runtime-interface = { workspace = true }
+libsecp256k1 = { workspace = true, features = ["hmac"] }
+log = "0.4.22"
 
 [features]
 default = ['std']
 runtime-benchmarks = []
 std = [
+  'libsecp256k1/std',
   'parity-scale-codec/std',
   'frame-support/std',
   'frame-system/std',
@@ -47,4 +50,4 @@ std = [
   'sp-externalities/std',
   'sp-runtime-interface/std'
 ]
-test = []
+test = []

common/primitives/src/lib.rs

@@ -41,3 +41,6 @@ pub mod offchain;
 #[cfg(feature = "runtime-benchmarks")]
 /// Benchmarking helper trait
 pub mod benchmarks;
+
+/// Signature support for ethereum
+pub mod signatures;

common/primitives/src/node.rs

@@ -6,6 +6,7 @@ pub use sp_runtime::{
 };
 use sp_std::{boxed::Box, vec::Vec};
 
+use crate::signatures::UnifiedSignature;
 use frame_support::dispatch::DispatchResultWithPostInfo;
 
 /// Some way of identifying an account on the chain. We intentionally make it equivalent
@@ -31,7 +32,7 @@ pub type BlockNumber = u32;
 pub type Header = generic::Header<BlockNumber, BlakeTwo256>;
 
 /// Alias to 512-bit hash when used in the context of a transaction signature on the chain.
-pub type Signature = MultiSignature;
+pub type Signature = UnifiedSignature;
 
 /// Index of a transaction in the chain.
 pub type Index = u32;