Westend Mock Runtime and Client (#874)

* Copy-Pasta Call code from mock Rococo to mock Westend runtime

* Update Westend client to include signing and call related code

* Add missing part of license header

* Move `account_info_storage_key` to `polkadot-core` crate

bridges/primitives/chain-rococo/Cargo.toml

@@ -15,22 +15,17 @@ bp-polkadot-core = { path = "../polkadot-core", default-features = false }
 bp-runtime = { path = "../runtime", default-features = false }
 
 # Substrate Based Dependencies
-frame-support = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-api = { git = "https://github.com/paritytech/substrate", branch = "master" , default-features = false }
 sp-runtime = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-std = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-version = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 
-[dev-dependencies]
-hex = "0.4"
-
 [features]
 default = ["std"]
 std = [
 	"bp-messages/std",
 	"bp-polkadot-core/std",
 	"bp-runtime/std",
-	"frame-support/std",
 	"parity-scale-codec/std",
 	"sp-api/std",
 	"sp-runtime/std",

bridges/primitives/chain-rococo/src/lib.rs

@@ -21,12 +21,14 @@
 #![allow(clippy::unnecessary_mut_passed)]
 
 use bp_messages::{LaneId, MessageNonce, UnrewardedRelayersState, Weight};
-use frame_support::{Blake2_128Concat, StorageHasher, Twox128};
 use sp_std::prelude::*;
 use sp_version::RuntimeVersion;
 
 pub use bp_polkadot_core::*;
 
+/// Rococo Chain
+pub type Rococo = PolkadotLike;
+
 pub type UncheckedExtrinsic = bp_polkadot_core::UncheckedExtrinsic<Call>;
 
 pub const VERSION: RuntimeVersion = RuntimeVersion {
@@ -55,29 +57,6 @@ impl sp_runtime::traits::Dispatchable for Call {
 	}
 }
 
-/// Return a storage key for account data.
-///
-/// This is based on FRAME storage-generation code from Substrate:
-/// https://github.com/paritytech/substrate/blob/c939ceba381b6313462d47334f775e128ea4e95d/frame/support/src/storage/generator/map.rs#L74
-/// The equivalent command to invoke in case full `Runtime` is known is this:
-/// `let key = frame_system::Account::<Runtime>::storage_map_final_key(&account_id);`
-pub fn account_info_storage_key(id: &AccountId) -> Vec<u8> {
-	let module_prefix_hashed = Twox128::hash(b"System");
-	let storage_prefix_hashed = Twox128::hash(b"Account");
-	let key_hashed = parity_scale_codec::Encode::using_encoded(id, Blake2_128Concat::hash);
-
-	let mut final_key = Vec::with_capacity(module_prefix_hashed.len() + storage_prefix_hashed.len() + key_hashed.len());
-
-	final_key.extend_from_slice(&module_prefix_hashed[..]);
-	final_key.extend_from_slice(&storage_prefix_hashed[..]);
-	final_key.extend_from_slice(&key_hashed);
-
-	final_key
-}
-
-/// Rococo Chain
-pub type Rococo = PolkadotLike;
-
 // We use this to get the account on Rococo (target) which is derived from Westend's (source)
 // account.
 pub fn derive_account_from_westend_id(id: bp_runtime::SourceAccount<AccountId>) -> AccountId {
@@ -165,19 +144,3 @@ sp_api::decl_runtime_apis! {
 		fn unrewarded_relayers_state(lane: LaneId) -> UnrewardedRelayersState;
 	}
 }
-
-#[cfg(test)]
-mod tests {
-	use super::*;
-
-	#[test]
-	fn should_generate_storage_key() {
-		let acc = [
-			1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
-			30, 31, 32,
-		]
-		.into();
-		let key = account_info_storage_key(&acc);
-		assert_eq!(hex::encode(key), "26aa394eea5630e07c48ae0c9558cef7b99d880ec681799c0cf30e8886371da92dccd599abfe1920a1cff8a7358231430102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20");
-	}
-}

bridges/primitives/chain-westend/Cargo.toml

@@ -7,6 +7,7 @@ edition = "2018"
 license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
 
 [dependencies]
+parity-scale-codec = { version = "2.0.0", default-features = false, features = ["derive"] }
 
 # Bridge Dependencies
 bp-messages = { path = "../messages", default-features = false }
@@ -15,6 +16,7 @@ bp-runtime = { path = "../runtime", default-features = false }
 
 # Substrate Based Dependencies
 sp-api = { git = "https://github.com/paritytech/substrate", branch = "master" , default-features = false }
+sp-runtime = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-std = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-version = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 
@@ -24,7 +26,9 @@ std = [
 	"bp-messages/std",
 	"bp-polkadot-core/std",
 	"bp-runtime/std",
+	"parity-scale-codec/std",
 	"sp-api/std",
+	"sp-runtime/std",
 	"sp-std/std",
 	"sp-version/std",
 ]

bridges/primitives/chain-westend/src/lib.rs

@@ -29,6 +29,8 @@ pub use bp_polkadot_core::*;
 /// Westend Chain
 pub type Westend = PolkadotLike;
 
+pub type UncheckedExtrinsic = bp_polkadot_core::UncheckedExtrinsic<Call>;
+
 /// Runtime version.
 pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: sp_version::create_runtime_str!("westend"),
@@ -40,6 +42,22 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	transaction_version: 5,
 };
 
+#[derive(parity_scale_codec::Encode, parity_scale_codec::Decode, Debug, PartialEq, Eq, Clone)]
+pub enum Call {
+	MockModule,
+}
+
+impl sp_runtime::traits::Dispatchable for Call {
+	type Origin = ();
+	type Config = ();
+	type Info = ();
+	type PostInfo = ();
+
+	fn dispatch(self, _origin: Self::Origin) -> sp_runtime::DispatchResultWithInfo<Self::PostInfo> {
+		unimplemented!("The Call is not expected to be dispatched.")
+	}
+}
+
 // We use this to get the account on Westend (target) which is derived from Rococo's (source)
 // account.
 pub fn derive_account_from_rococo_id(id: bp_runtime::SourceAccount<AccountId>) -> AccountId {

bridges/primitives/polkadot-core/Cargo.toml

@@ -24,6 +24,9 @@ sp-runtime = { git = "https://github.com/paritytech/substrate", branch = "master
 sp-std = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-version = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 
+[dev-dependencies]
+hex = "0.4"
+
 [features]
 default = ["std"]
 std = [

bridges/primitives/polkadot-core/src/lib.rs

@@ -25,7 +25,7 @@ use frame_support::{
 		constants::{BlockExecutionWeight, ExtrinsicBaseWeight, WEIGHT_PER_SECOND},
 		DispatchClass, Weight,
 	},
-	RuntimeDebug,
+	Blake2_128Concat, RuntimeDebug, StorageHasher, Twox128,
 };
 use frame_system::limits;
 use sp_core::Hasher as HasherT;
@@ -34,6 +34,7 @@ use sp_runtime::{
 	traits::{BlakeTwo256, IdentifyAccount, Verify},
 	MultiSignature, OpaqueExtrinsic, Perbill,
 };
+use sp_std::prelude::Vec;
 
 // Re-export's to avoid extra substrate dependencies in chain-specific crates.
 pub use frame_support::Parameter;
@@ -290,6 +291,26 @@ impl Convert<sp_core::H256, AccountId> for AccountIdConverter {
 	}
 }
 
+/// Return a storage key for account data.
+///
+/// This is based on FRAME storage-generation code from Substrate:
+/// https://github.com/paritytech/substrate/blob/c939ceba381b6313462d47334f775e128ea4e95d/frame/support/src/storage/generator/map.rs#L74
+/// The equivalent command to invoke in case full `Runtime` is known is this:
+/// `let key = frame_system::Account::<Runtime>::storage_map_final_key(&account_id);`
+pub fn account_info_storage_key(id: &AccountId) -> Vec<u8> {
+	let module_prefix_hashed = Twox128::hash(b"System");
+	let storage_prefix_hashed = Twox128::hash(b"Account");
+	let key_hashed = parity_scale_codec::Encode::using_encoded(id, Blake2_128Concat::hash);
+
+	let mut final_key = Vec::with_capacity(module_prefix_hashed.len() + storage_prefix_hashed.len() + key_hashed.len());
+
+	final_key.extend_from_slice(&module_prefix_hashed[..]);
+	final_key.extend_from_slice(&storage_prefix_hashed[..]);
+	final_key.extend_from_slice(&key_hashed);
+
+	final_key
+}
+
 #[cfg(test)]
 mod tests {
 	use super::*;
@@ -305,4 +326,15 @@ mod tests {
 			MAXIMAL_ENCODED_ACCOUNT_ID_SIZE,
 		);
 	}
+
+	#[test]
+	fn should_generate_storage_key() {
+		let acc = [
+			1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
+			30, 31, 32,
+		]
+		.into();
+		let key = account_info_storage_key(&acc);
+		assert_eq!(hex::encode(key), "26aa394eea5630e07c48ae0c9558cef7b99d880ec681799c0cf30e8886371da92dccd599abfe1920a1cff8a7358231430102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20");
+	}
 }

bridges/relays/client-rococo/src/lib.rs

@@ -1,3 +1,6 @@
+// Copyright 2019-2021 Parity Technologies (UK) Ltd.
+// This file is part of Parity Bridges Common.
+
 // Parity Bridges Common is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
@@ -22,6 +25,9 @@ use std::time::Duration;
 /// Rococo header id.
 pub type HeaderId = relay_utils::HeaderId<bp_rococo::Hash, bp_rococo::BlockNumber>;
 
+/// Rococo header type used in headers sync.
+pub type SyncHeader = relay_substrate_client::SyncHeader<bp_rococo::Header>;
+
 /// Rococo chain definition
 #[derive(Debug, Clone, Copy)]
 pub struct Rococo;
@@ -111,6 +117,3 @@ impl Default for SigningParams {
 		}
 	}
 }
-
-/// Rococo header type used in headers sync.
-pub type SyncHeader = relay_substrate_client::SyncHeader<bp_rococo::Header>;

bridges/relays/client-westend/src/lib.rs

@@ -16,12 +16,18 @@
 
 //! Types used to connect to the Westend chain.
 
-use relay_substrate_client::{Chain, ChainBase};
+use codec::Encode;
+use relay_substrate_client::{Chain, ChainBase, ChainWithBalances, TransactionSignScheme};
+use sp_core::{storage::StorageKey, Pair};
+use sp_runtime::{generic::SignedPayload, traits::IdentifyAccount};
 use std::time::Duration;
 
 /// Westend header id.
 pub type HeaderId = relay_utils::HeaderId<bp_westend::Hash, bp_westend::BlockNumber>;
 
+/// Westend header type used in headers sync.
+pub type SyncHeader = relay_substrate_client::SyncHeader<bp_westend::Header>;
+
 /// Westend chain definition
 #[derive(Debug, Clone, Copy)]
 pub struct Westend;
@@ -40,8 +46,74 @@ impl Chain for Westend {
 	type AccountId = bp_westend::AccountId;
 	type Index = bp_westend::Nonce;
 	type SignedBlock = bp_westend::SignedBlock;
-	type Call = ();
+	type Call = bp_westend::Call;
 }
 
-/// Westend header type used in headers sync.
-pub type SyncHeader = relay_substrate_client::SyncHeader<bp_westend::Header>;
+impl ChainWithBalances for Westend {
+	type NativeBalance = bp_westend::Balance;
+
+	fn account_info_storage_key(account_id: &Self::AccountId) -> StorageKey {
+		StorageKey(bp_westend::account_info_storage_key(account_id))
+	}
+}
+
+impl TransactionSignScheme for Westend {
+	type Chain = Westend;
+	type AccountKeyPair = sp_core::sr25519::Pair;
+	type SignedTransaction = bp_westend::UncheckedExtrinsic;
+
+	fn sign_transaction(
+		genesis_hash: <Self::Chain as ChainBase>::Hash,
+		signer: &Self::AccountKeyPair,
+		signer_nonce: <Self::Chain as Chain>::Index,
+		call: <Self::Chain as Chain>::Call,
+	) -> Self::SignedTransaction {
+		let raw_payload = SignedPayload::new(
+			call,
+			bp_westend::SignedExtensions::new(
+				bp_westend::VERSION,
+				sp_runtime::generic::Era::Immortal,
+				genesis_hash,
+				signer_nonce,
+				0,
+			),
+		)
+		.expect("SignedExtension never fails.");
+
+		let signature = raw_payload.using_encoded(|payload| signer.sign(payload));
+		let signer: sp_runtime::MultiSigner = signer.public().into();
+		let (call, extra, _) = raw_payload.deconstruct();
+
+		bp_westend::UncheckedExtrinsic::new_signed(call, signer.into_account(), signature.into(), extra)
+	}
+}
+
+/// Westend signing params.
+#[derive(Clone)]
+pub struct SigningParams {
+	/// Substrate transactions signer.
+	pub signer: sp_core::sr25519::Pair,
+}
+
+impl SigningParams {
+	/// Create signing params from SURI and password.
+	pub fn from_suri(suri: &str, password: Option<&str>) -> Result<Self, sp_core::crypto::SecretStringError> {
+		Ok(SigningParams {
+			signer: sp_core::sr25519::Pair::from_string(suri, password)?,
+		})
+	}
+}
+
+impl std::fmt::Debug for SigningParams {
+	fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+		write!(f, "{}", self.signer.public())
+	}
+}
+
+impl Default for SigningParams {
+	fn default() -> Self {
+		SigningParams {
+			signer: sp_keyring::AccountKeyring::Alice.pair(),
+		}
+	}
+}