Parachains finality relay (#1199)

bridges/relays/client-substrate/Cargo.toml

@@ -9,6 +9,7 @@ license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
 async-std = { version = "1.6.5", features = ["attributes"] }
 async-trait = "0.1"
 codec = { package = "parity-scale-codec", version = "3.0.0" }
+futures = "0.3.7"
 jsonrpsee = { version = "0.8", features = ["macros", "ws-client"] }
 log = "0.4.11"
 num-traits = "0.2"
@@ -44,5 +45,6 @@ sp-storage = { git = "https://github.com/paritytech/substrate", branch = "master
 sp-trie = { git = "https://github.com/paritytech/substrate", branch = "master" }
 sp-version = { git = "https://github.com/paritytech/substrate", branch = "master" }
 
-#[dev-dependencies]
-futures = "0.3.7"
+[features]
+default = []
+test-helpers = []

bridges/relays/client-substrate/src/guard.rs

@@ -196,7 +196,7 @@ impl<C: ChainWithBalances> Environment<C> for Client<C> {
 #[cfg(test)]
 mod tests {
 	use super::*;
-	use frame_support::weights::{IdentityFee, Weight};
+	use crate::test_chain::TestChain;
 	use futures::{
 		channel::mpsc::{unbounded, UnboundedReceiver, UnboundedSender},
 		future::FutureExt,
@@ -204,49 +204,6 @@ mod tests {
 		SinkExt,
 	};
 
-	#[derive(Debug, Clone)]
-	struct TestChain;
-
-	impl bp_runtime::Chain for TestChain {
-		type BlockNumber = u32;
-		type Hash = sp_core::H256;
-		type Hasher = sp_runtime::traits::BlakeTwo256;
-		type Header = sp_runtime::generic::Header<u32, sp_runtime::traits::BlakeTwo256>;
-
-		type AccountId = u32;
-		type Balance = u32;
-		type Index = u32;
-		type Signature = sp_runtime::testing::TestSignature;
-
-		fn max_extrinsic_size() -> u32 {
-			unreachable!()
-		}
-		fn max_extrinsic_weight() -> Weight {
-			unreachable!()
-		}
-	}
-
-	impl Chain for TestChain {
-		const NAME: &'static str = "Test";
-		const TOKEN_ID: Option<&'static str> = None;
-		const BEST_FINALIZED_HEADER_ID_METHOD: &'static str = "BestTestHeader";
-		const AVERAGE_BLOCK_INTERVAL: Duration = Duration::from_millis(1);
-		const STORAGE_PROOF_OVERHEAD: u32 = 0;
-		const MAXIMAL_ENCODED_ACCOUNT_ID_SIZE: u32 = 0;
-
-		type SignedBlock = sp_runtime::generic::SignedBlock<
-			sp_runtime::generic::Block<Self::Header, sp_runtime::OpaqueExtrinsic>,
-		>;
-		type Call = ();
-		type WeightToFee = IdentityFee<u32>;
-	}
-
-	impl ChainWithBalances for TestChain {
-		fn account_info_storage_key(_account_id: &u32) -> sp_core::storage::StorageKey {
-			unreachable!()
-		}
-	}
-
 	struct TestEnvironment {
 		runtime_version_rx: UnboundedReceiver<RuntimeVersion>,
 		free_native_balance_rx: UnboundedReceiver<u32>,

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

@@ -26,6 +26,7 @@ mod sync_header;
 
 pub mod guard;
 pub mod metrics;
+pub mod test_chain;
 
 use std::time::Duration;
 

bridges/relays/client-substrate/src/test_chain.rs

@@ -0,0 +1,71 @@
+// 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
+// (at your option) any later version.
+
+// Parity Bridges Common is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Pallet provides a set of guard functions that are running in background threads
+//! and are aborting process if some condition fails.
+
+//! Test chain implementation to use in tests.
+
+#![cfg(any(feature = "test-helpers", test))]
+
+use crate::{Chain, ChainWithBalances};
+use frame_support::weights::{IdentityFee, Weight};
+use std::time::Duration;
+
+/// Chain that may be used in tests.
+#[derive(Clone, Debug, PartialEq)]
+pub struct TestChain;
+
+impl bp_runtime::Chain for TestChain {
+	type BlockNumber = u32;
+	type Hash = sp_core::H256;
+	type Hasher = sp_runtime::traits::BlakeTwo256;
+	type Header = sp_runtime::generic::Header<u32, sp_runtime::traits::BlakeTwo256>;
+
+	type AccountId = u32;
+	type Balance = u32;
+	type Index = u32;
+	type Signature = sp_runtime::testing::TestSignature;
+
+	fn max_extrinsic_size() -> u32 {
+		unreachable!()
+	}
+
+	fn max_extrinsic_weight() -> Weight {
+		unreachable!()
+	}
+}
+
+impl Chain for TestChain {
+	const NAME: &'static str = "Test";
+	const TOKEN_ID: Option<&'static str> = None;
+	const BEST_FINALIZED_HEADER_ID_METHOD: &'static str = "TestMethod";
+	const AVERAGE_BLOCK_INTERVAL: Duration = Duration::from_millis(0);
+	const STORAGE_PROOF_OVERHEAD: u32 = 0;
+	const MAXIMAL_ENCODED_ACCOUNT_ID_SIZE: u32 = 0;
+
+	type SignedBlock = sp_runtime::generic::SignedBlock<
+		sp_runtime::generic::Block<Self::Header, sp_runtime::OpaqueExtrinsic>,
+	>;
+	type Call = ();
+	type WeightToFee = IdentityFee<u32>;
+}
+
+impl ChainWithBalances for TestChain {
+	fn account_info_storage_key(_account_id: &u32) -> sp_core::storage::StorageKey {
+		unreachable!()
+	}
+}