Move generic CLI logic to different crate (#2885)

* Move generic CLI logic to separate crate

* Move and rename `CliChain` trait definition

Move it to `relay-substrate-client`

* Move generic cli logic to substrate-relay-helper

* Fix docs warnings

bridges/relays/bin-substrate/src/bridges/kusama_polkadot/bridge_hub_kusama_messages_to_bridge_hub_polkadot.rs

@@ -16,10 +16,13 @@
 
 //! BridgeHubKusama-to-BridgeHubPolkadot messages sync entrypoint.
 
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge};
 use relay_bridge_hub_kusama_client::BridgeHubKusama;
 use relay_bridge_hub_polkadot_client::BridgeHubPolkadot;
-use substrate_relay_helper::{messages_lane::SubstrateMessageLane, UtilityPalletBatchCallBuilder};
+use substrate_relay_helper::{
+	cli::bridge::{CliBridgeBase, MessagesCliBridge},
+	messages_lane::SubstrateMessageLane,
+	UtilityPalletBatchCallBuilder,
+};
 
 /// BridgeHubKusama-to-BridgeHubPolkadot messages bridge.
 pub struct BridgeHubKusamaToBridgeHubPolkadotMessagesCliBridge {}

bridges/relays/bin-substrate/src/bridges/kusama_polkadot/bridge_hub_polkadot_messages_to_bridge_hub_kusama.rs

@@ -16,10 +16,13 @@
 
 //! BridgeHubPolkadot-to-BridgeHubKusama messages sync entrypoint.
 
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge};
 use relay_bridge_hub_kusama_client::BridgeHubKusama;
 use relay_bridge_hub_polkadot_client::BridgeHubPolkadot;
-use substrate_relay_helper::{messages_lane::SubstrateMessageLane, UtilityPalletBatchCallBuilder};
+use substrate_relay_helper::{
+	cli::bridge::{CliBridgeBase, MessagesCliBridge},
+	messages_lane::SubstrateMessageLane,
+	UtilityPalletBatchCallBuilder,
+};
 
 /// BridgeHubPolkadot-to-BridgeHubKusama messages bridge.
 pub struct BridgeHubPolkadotToBridgeHubKusamaMessagesCliBridge {}

bridges/relays/bin-substrate/src/bridges/kusama_polkadot/kusama_headers_to_bridge_hub_polkadot.rs

@@ -16,7 +16,7 @@
 
 //! Kusama-to-BridgeHubPolkadot headers sync entrypoint.
 
-use crate::cli::bridge::{
+use substrate_relay_helper::cli::bridge::{
 	CliBridgeBase, RelayToRelayEquivocationDetectionCliBridge, RelayToRelayHeadersCliBridge,
 };
 

bridges/relays/bin-substrate/src/bridges/kusama_polkadot/kusama_parachains_to_bridge_hub_polkadot.rs

@@ -16,11 +16,11 @@
 
 //! Kusama-to-BridgeHubPolkadot parachains sync entrypoint.
 
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge};
 use bp_polkadot_core::parachains::{ParaHash, ParaHeadsProof, ParaId};
 use relay_substrate_client::{CallOf, HeaderIdOf};
-use substrate_relay_helper::parachains::{
+use substrate_relay_helper::{
-	SubmitParachainHeadsCallBuilder, SubstrateParachainsPipeline,
+	cli::bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge},
+	parachains::{SubmitParachainHeadsCallBuilder, SubstrateParachainsPipeline},
 };
 
 /// Kusama-to-BridgeHubPolkadot parachain sync description.

bridges/relays/bin-substrate/src/bridges/kusama_polkadot/polkadot_headers_to_bridge_hub_kusama.rs

@@ -16,7 +16,7 @@
 
 //! Polkadot-to-KusamaBridgeHub headers sync entrypoint.
 
-use crate::cli::bridge::{
+use substrate_relay_helper::cli::bridge::{
 	CliBridgeBase, RelayToRelayEquivocationDetectionCliBridge, RelayToRelayHeadersCliBridge,
 };
 

bridges/relays/bin-substrate/src/bridges/kusama_polkadot/polkadot_parachains_to_bridge_hub_kusama.rs

@@ -16,11 +16,11 @@
 
 //! Polkadot-to-BridgeHubKusama parachains sync entrypoint.
 
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge};
 use bp_polkadot_core::parachains::{ParaHash, ParaHeadsProof, ParaId};
 use relay_substrate_client::{CallOf, HeaderIdOf};
-use substrate_relay_helper::parachains::{
+use substrate_relay_helper::{
-	SubmitParachainHeadsCallBuilder, SubstrateParachainsPipeline,
+	cli::bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge},
+	parachains::{SubmitParachainHeadsCallBuilder, SubstrateParachainsPipeline},
 };
 
 /// Polkadot-to-BridgeHubKusama parachain sync description.

bridges/relays/bin-substrate/src/bridges/polkadot_bulletin/bridge_hub_polkadot_messages_to_polkadot_bulletin.rs

@@ -16,10 +16,13 @@
 
 //! BridgeHubPolkadot-to-PolkadotBulletin messages sync entrypoint.
 
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge};
 use relay_bridge_hub_polkadot_client::BridgeHubPolkadot;
 use relay_polkadot_bulletin_client::PolkadotBulletin;
-use substrate_relay_helper::{messages_lane::SubstrateMessageLane, UtilityPalletBatchCallBuilder};
+use substrate_relay_helper::{
+	cli::bridge::{CliBridgeBase, MessagesCliBridge},
+	messages_lane::SubstrateMessageLane,
+	UtilityPalletBatchCallBuilder,
+};
 
 /// BridgeHubPolkadot-to-PolkadotBulletin messages bridge.
 pub struct BridgeHubPolkadotToPolkadotBulletinMessagesCliBridge {}

bridges/relays/bin-substrate/src/bridges/polkadot_bulletin/polkadot_bulletin_headers_to_bridge_hub_polkadot.rs

@@ -16,11 +16,6 @@
 
 //! PolkadotBulletin-to-BridgeHubPolkadot headers sync entrypoint.
 
-use crate::cli::bridge::{
-	CliBridgeBase, MessagesCliBridge, RelayToRelayEquivocationDetectionCliBridge,
-	RelayToRelayHeadersCliBridge,
-};
-
 use async_trait::async_trait;
 use substrate_relay_helper::{
 	equivocation::SubstrateEquivocationDetectionPipeline,
@@ -28,6 +23,11 @@ use substrate_relay_helper::{
 	finality_base::{engine::Grandpa as GrandpaFinalityEngine, SubstrateFinalityPipeline},
 };
 
+use substrate_relay_helper::cli::bridge::{
+	CliBridgeBase, MessagesCliBridge, RelayToRelayEquivocationDetectionCliBridge,
+	RelayToRelayHeadersCliBridge,
+};
+
 /// Description of `PolkadotBulletin` -> `PolkadotBridgeHub` finalized headers bridge.
 #[derive(Clone, Debug)]
 pub struct PolkadotBulletinFinalityToBridgeHubPolkadot;

bridges/relays/bin-substrate/src/bridges/polkadot_bulletin/polkadot_bulletin_messages_to_bridge_hub_polkadot.rs

@@ -16,10 +16,13 @@
 
 //! PolkadotBulletin-to-BridgeHubPolkadot messages sync entrypoint.
 
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge};
 use relay_bridge_hub_polkadot_client::BridgeHubPolkadot;
 use relay_polkadot_bulletin_client::PolkadotBulletin;
-use substrate_relay_helper::{messages_lane::SubstrateMessageLane, UtilityPalletBatchCallBuilder};
+use substrate_relay_helper::{
+	cli::bridge::{CliBridgeBase, MessagesCliBridge},
+	messages_lane::SubstrateMessageLane,
+	UtilityPalletBatchCallBuilder,
+};
 
 /// PolkadotBulletin-to-BridgeHubPolkadot messages bridge.
 pub struct PolkadotBulletinToBridgeHubPolkadotMessagesCliBridge {}

bridges/relays/bin-substrate/src/bridges/polkadot_bulletin/polkadot_headers_to_polkadot_bulletin.rs

@@ -16,10 +16,6 @@
 
 //! Polkadot-to-PolkadotBulletin headers sync entrypoint.
 
-use crate::cli::bridge::{
-	CliBridgeBase, RelayToRelayEquivocationDetectionCliBridge, RelayToRelayHeadersCliBridge,
-};
-
 use async_trait::async_trait;
 use substrate_relay_helper::{
 	equivocation::SubstrateEquivocationDetectionPipeline,
@@ -27,6 +23,10 @@ use substrate_relay_helper::{
 	finality_base::{engine::Grandpa as GrandpaFinalityEngine, SubstrateFinalityPipeline},
 };
 
+use substrate_relay_helper::cli::bridge::{
+	CliBridgeBase, RelayToRelayEquivocationDetectionCliBridge, RelayToRelayHeadersCliBridge,
+};
+
 /// Description of Polkadot -> `PolkadotBulletin` finalized headers bridge.
 #[derive(Clone, Debug)]
 pub struct PolkadotFinalityToPolkadotBulletin;

bridges/relays/bin-substrate/src/bridges/polkadot_bulletin/polkadot_parachains_to_polkadot_bulletin.rs

@@ -16,7 +16,9 @@
 
 //! Polkadot-to-PolkadotBulletin parachains sync entrypoint.
 
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge};
+use substrate_relay_helper::cli::bridge::{
+	CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge,
+};
 
 use bp_polkadot_core::parachains::{ParaHash, ParaHeadsProof, ParaId};
 use bp_runtime::Chain;

bridges/relays/bin-substrate/src/bridges/rococo_bulletin/bridge_hub_rococo_messages_to_rococo_bulletin.rs

@@ -17,9 +17,12 @@
 //! BridgeHubRococo-to-RococoBulletin messages sync entrypoint.
 
 use super::BridgeHubRococoAsBridgeHubPolkadot;
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge};
 use relay_polkadot_bulletin_client::PolkadotBulletin as RococoBulletin;
-use substrate_relay_helper::{messages_lane::SubstrateMessageLane, UtilityPalletBatchCallBuilder};
+use substrate_relay_helper::{
+	cli::bridge::{CliBridgeBase, MessagesCliBridge},
+	messages_lane::SubstrateMessageLane,
+	UtilityPalletBatchCallBuilder,
+};
 
 /// BridgeHubRococo-to-RococoBulletin messages bridge.
 pub struct BridgeHubRococoToRococoBulletinMessagesCliBridge {}

bridges/relays/bin-substrate/src/bridges/rococo_bulletin/mod.rs

@@ -16,8 +16,6 @@
 
 //! Declaration of all bridges between Rococo Bulletin Chain and Rococo Bridge Hub.
 
-use crate::cli::CliChain;
-
 use bp_messages::MessageNonce;
 use bp_runtime::{
 	AccountIdOf, BalanceOf, BlockNumberOf, ChainId, HashOf, HasherOf, HeaderOf, NonceOf,
@@ -25,7 +23,8 @@ use bp_runtime::{
 };
 use frame_support::pallet_prelude::Weight;
 use relay_substrate_client::{
-	Error as SubstrateError, SignParam, SimpleRuntimeVersion, UnsignedTransaction,
+	ChainWithRuntimeVersion, Error as SubstrateError, SignParam, SimpleRuntimeVersion,
+	UnsignedTransaction,
 };
 use sp_core::storage::StorageKey;
 use std::time::Duration;
@@ -127,7 +126,7 @@ impl relay_substrate_client::ChainWithTransactions for RococoAsPolkadot {
 	}
 }
 
-impl CliChain for RococoAsPolkadot {
+impl ChainWithRuntimeVersion for RococoAsPolkadot {
 	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> = None;
 }
 
@@ -232,7 +231,7 @@ impl relay_substrate_client::ChainWithMessages for BridgeHubRococoAsBridgeHubPol
 		relay_bridge_hub_polkadot_client::BridgeHubPolkadot::FROM_CHAIN_MESSAGE_DETAILS_METHOD;
 }
 
-impl CliChain for BridgeHubRococoAsBridgeHubPolkadot {
+impl ChainWithRuntimeVersion for BridgeHubRococoAsBridgeHubPolkadot {
 	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
 		Some(SimpleRuntimeVersion { spec_version: 1_003_000, transaction_version: 3 });
 }

bridges/relays/bin-substrate/src/bridges/rococo_bulletin/rococo_bulletin_headers_to_bridge_hub_rococo.rs

@@ -17,10 +17,6 @@
 //! RococoBulletin-to-BridgeHubRococo headers sync entrypoint.
 
 use super::BridgeHubRococoAsBridgeHubPolkadot;
-use crate::cli::bridge::{
-	CliBridgeBase, MessagesCliBridge, RelayToRelayEquivocationDetectionCliBridge,
-	RelayToRelayHeadersCliBridge,
-};
 
 use async_trait::async_trait;
 use substrate_relay_helper::{
@@ -29,6 +25,11 @@ use substrate_relay_helper::{
 	finality_base::{engine::Grandpa as GrandpaFinalityEngine, SubstrateFinalityPipeline},
 };
 
+use substrate_relay_helper::cli::bridge::{
+	CliBridgeBase, MessagesCliBridge, RelayToRelayEquivocationDetectionCliBridge,
+	RelayToRelayHeadersCliBridge,
+};
+
 /// Description of `RococoBulletin` -> `RococoBridgeHub` finalized headers bridge.
 #[derive(Clone, Debug)]
 pub struct RococoBulletinFinalityToBridgeHubRococo;

bridges/relays/bin-substrate/src/bridges/rococo_bulletin/rococo_bulletin_messages_to_bridge_hub_rococo.rs

@@ -17,9 +17,12 @@
 //! RococoBulletin-to-BridgeHubRococo messages sync entrypoint.
 
 use super::BridgeHubRococoAsBridgeHubPolkadot;
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge};
 use relay_polkadot_bulletin_client::PolkadotBulletin as RococoBulletin;
-use substrate_relay_helper::{messages_lane::SubstrateMessageLane, UtilityPalletBatchCallBuilder};
+use substrate_relay_helper::{
+	cli::bridge::{CliBridgeBase, MessagesCliBridge},
+	messages_lane::SubstrateMessageLane,
+	UtilityPalletBatchCallBuilder,
+};
 
 /// RococoBulletin-to-BridgeHubRococo messages bridge.
 pub struct RococoBulletinToBridgeHubRococoMessagesCliBridge {}

bridges/relays/bin-substrate/src/bridges/rococo_bulletin/rococo_headers_to_rococo_bulletin.rs

@@ -17,9 +17,6 @@
 //! Rococo-to-RococoBulletin headers sync entrypoint.
 
 use super::RococoAsPolkadot;
-use crate::cli::bridge::{
-	CliBridgeBase, RelayToRelayEquivocationDetectionCliBridge, RelayToRelayHeadersCliBridge,
-};
 
 use async_trait::async_trait;
 use substrate_relay_helper::{
@@ -28,6 +25,10 @@ use substrate_relay_helper::{
 	finality_base::{engine::Grandpa as GrandpaFinalityEngine, SubstrateFinalityPipeline},
 };
 
+use substrate_relay_helper::cli::bridge::{
+	CliBridgeBase, RelayToRelayEquivocationDetectionCliBridge, RelayToRelayHeadersCliBridge,
+};
+
 /// Description of Rococo -> `RococoBulletin` finalized headers bridge.
 #[derive(Clone, Debug)]
 pub struct RococoFinalityToRococoBulletin;

bridges/relays/bin-substrate/src/bridges/rococo_bulletin/rococo_parachains_to_rococo_bulletin.rs

@@ -17,12 +17,12 @@
 //! Rococo-to-RococoBulletin parachains sync entrypoint.
 
 use super::{BridgeHubRococoAsBridgeHubPolkadot, RococoAsPolkadot};
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge};
 
 use bp_polkadot_core::parachains::{ParaHash, ParaHeadsProof, ParaId};
 use bp_runtime::Chain;
 use relay_substrate_client::{CallOf, HeaderIdOf};
 use substrate_relay_helper::{
+	cli::bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge},
 	messages_lane::MessagesRelayLimits,
 	parachains::{SubmitParachainHeadsCallBuilder, SubstrateParachainsPipeline},
 };

bridges/relays/bin-substrate/src/bridges/rococo_westend/bridge_hub_rococo_messages_to_bridge_hub_westend.rs

@@ -16,10 +16,13 @@
 
 //! BridgeHubRococo-to-BridgeHubWestend messages sync entrypoint.
 
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge};
 use relay_bridge_hub_rococo_client::BridgeHubRococo;
 use relay_bridge_hub_westend_client::BridgeHubWestend;
-use substrate_relay_helper::{messages_lane::SubstrateMessageLane, UtilityPalletBatchCallBuilder};
+use substrate_relay_helper::{
+	cli::bridge::{CliBridgeBase, MessagesCliBridge},
+	messages_lane::SubstrateMessageLane,
+	UtilityPalletBatchCallBuilder,
+};
 
 pub struct BridgeHubRococoToBridgeHubWestendMessagesCliBridge {}
 

bridges/relays/bin-substrate/src/bridges/rococo_westend/bridge_hub_westend_messages_to_bridge_hub_rococo.rs

@@ -16,10 +16,13 @@
 
 //! BridgeHubWestend-to-BridgeHubRococo messages sync entrypoint.
 
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge};
 use relay_bridge_hub_rococo_client::BridgeHubRococo;
 use relay_bridge_hub_westend_client::BridgeHubWestend;
-use substrate_relay_helper::{messages_lane::SubstrateMessageLane, UtilityPalletBatchCallBuilder};
+use substrate_relay_helper::{
+	cli::bridge::{CliBridgeBase, MessagesCliBridge},
+	messages_lane::SubstrateMessageLane,
+	UtilityPalletBatchCallBuilder,
+};
 
 pub struct BridgeHubWestendToBridgeHubRococoMessagesCliBridge {}
 

bridges/relays/bin-substrate/src/bridges/rococo_westend/rococo_headers_to_bridge_hub_westend.rs

@@ -16,10 +16,6 @@
 
 //! Rococo-to-Westend bridge hubs headers sync entrypoint.
 
-use crate::cli::bridge::{
-	CliBridgeBase, RelayToRelayEquivocationDetectionCliBridge, RelayToRelayHeadersCliBridge,
-};
-
 use async_trait::async_trait;
 use substrate_relay_helper::{
 	equivocation::SubstrateEquivocationDetectionPipeline,
@@ -27,6 +23,10 @@ use substrate_relay_helper::{
 	finality_base::{engine::Grandpa as GrandpaFinalityEngine, SubstrateFinalityPipeline},
 };
 
+use substrate_relay_helper::cli::bridge::{
+	CliBridgeBase, RelayToRelayEquivocationDetectionCliBridge, RelayToRelayHeadersCliBridge,
+};
+
 /// Description of Rococo -> Westend finalized headers bridge.
 #[derive(Clone, Debug)]
 pub struct RococoFinalityToBridgeHubWestend;

bridges/relays/bin-substrate/src/bridges/rococo_westend/rococo_parachains_to_bridge_hub_westend.rs

@@ -16,11 +16,11 @@
 
 //! Westend-to-Rococo parachains sync entrypoint.
 
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge};
 use bp_polkadot_core::parachains::{ParaHash, ParaHeadsProof, ParaId};
 use relay_substrate_client::{CallOf, HeaderIdOf};
-use substrate_relay_helper::parachains::{
+use substrate_relay_helper::{
-	SubmitParachainHeadsCallBuilder, SubstrateParachainsPipeline,
+	cli::bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge},
+	parachains::{SubmitParachainHeadsCallBuilder, SubstrateParachainsPipeline},
 };
 
 /// BridgeHub-to-BridgeHub parachain sync description.

bridges/relays/bin-substrate/src/bridges/rococo_westend/westend_headers_to_bridge_hub_rococo.rs

@@ -16,10 +16,6 @@
 
 //! Westend-to-Rococo bridge hubs headers sync entrypoint.
 
-use crate::cli::bridge::{
-	CliBridgeBase, RelayToRelayEquivocationDetectionCliBridge, RelayToRelayHeadersCliBridge,
-};
-
 use async_trait::async_trait;
 use substrate_relay_helper::{
 	equivocation::SubstrateEquivocationDetectionPipeline,
@@ -27,6 +23,10 @@ use substrate_relay_helper::{
 	finality_base::{engine::Grandpa as GrandpaFinalityEngine, SubstrateFinalityPipeline},
 };
 
+use substrate_relay_helper::cli::bridge::{
+	CliBridgeBase, RelayToRelayEquivocationDetectionCliBridge, RelayToRelayHeadersCliBridge,
+};
+
 /// Description of Westend -> Rococo finalized headers bridge.
 #[derive(Clone, Debug)]
 pub struct WestendFinalityToBridgeHubRococo;

bridges/relays/bin-substrate/src/bridges/rococo_westend/westend_parachains_to_bridge_hub_rococo.rs

@@ -16,11 +16,11 @@
 
 //! Rococo-to-Westend parachains sync entrypoint.
 
-use crate::cli::bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge};
 use bp_polkadot_core::parachains::{ParaHash, ParaHeadsProof, ParaId};
 use relay_substrate_client::{CallOf, HeaderIdOf};
-use substrate_relay_helper::parachains::{
+use substrate_relay_helper::{
-	SubmitParachainHeadsCallBuilder, SubstrateParachainsPipeline,
+	cli::bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge},
+	parachains::{SubmitParachainHeadsCallBuilder, SubstrateParachainsPipeline},
 };
 
 /// BridgeHub-to-BridgeHub parachain sync description.

bridges/relays/bin-substrate/src/chains/kusama.rs

@@ -1,32 +0,0 @@
-// Copyright 2022 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/>.
-
-//! Kusama + Kusama parachains specification for CLI.
-
-use crate::cli::CliChain;
-use relay_bridge_hub_kusama_client::BridgeHubKusama;
-use relay_kusama_client::Kusama;
-use relay_substrate_client::SimpleRuntimeVersion;
-
-impl CliChain for Kusama {
-	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
-		Some(SimpleRuntimeVersion { spec_version: 1_001_002, transaction_version: 25 });
-}
-
-impl CliChain for BridgeHubKusama {
-	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
-		Some(SimpleRuntimeVersion { spec_version: 1_001_000, transaction_version: 4 });
-}

bridges/relays/bin-substrate/src/chains/mod.rs

@@ -1,23 +0,0 @@
-// 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/>.
-
-//! Chain-specific relayer configuration.
-
-mod kusama;
-mod polkadot;
-mod polkadot_bulletin;
-mod rococo;
-mod westend;

bridges/relays/bin-substrate/src/chains/polkadot.rs

@@ -1,32 +0,0 @@
-// Copyright 2022 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/>.
-
-//! Polkadot + Polkadot parachains specification for CLI.
-
-use crate::cli::CliChain;
-use relay_bridge_hub_polkadot_client::BridgeHubPolkadot;
-use relay_polkadot_client::Polkadot;
-use relay_substrate_client::SimpleRuntimeVersion;
-
-impl CliChain for Polkadot {
-	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
-		Some(SimpleRuntimeVersion { spec_version: 1_001_002, transaction_version: 25 });
-}
-
-impl CliChain for BridgeHubPolkadot {
-	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
-		Some(SimpleRuntimeVersion { spec_version: 1_001_000, transaction_version: 3 });
-}

bridges/relays/bin-substrate/src/chains/polkadot_bulletin.rs

@@ -1,26 +0,0 @@
-// Copyright 2022 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/>.
-
-//! Polkadot + Polkadot parachains specification for CLI.
-
-use crate::cli::CliChain;
-use relay_polkadot_bulletin_client::PolkadotBulletin;
-use relay_substrate_client::SimpleRuntimeVersion;
-
-impl CliChain for PolkadotBulletin {
-	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
-		Some(SimpleRuntimeVersion { spec_version: 100, transaction_version: 1 });
-}

bridges/relays/bin-substrate/src/chains/rococo.rs

@@ -1,32 +0,0 @@
-// Copyright 2022 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/>.
-
-//! Rococo + Rococo parachains specification for CLI.
-
-use crate::cli::CliChain;
-use relay_bridge_hub_rococo_client::BridgeHubRococo;
-use relay_rococo_client::Rococo;
-use relay_substrate_client::SimpleRuntimeVersion;
-
-impl CliChain for Rococo {
-	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
-		Some(SimpleRuntimeVersion { spec_version: 1_008_000, transaction_version: 24 });
-}
-
-impl CliChain for BridgeHubRococo {
-	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
-		Some(SimpleRuntimeVersion { spec_version: 1_008_000, transaction_version: 4 });
-}

bridges/relays/bin-substrate/src/chains/westend.rs

@@ -1,32 +0,0 @@
-// 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/>.
-
-//! Westend chain specification for CLI.
-
-use crate::cli::CliChain;
-use relay_bridge_hub_westend_client::BridgeHubWestend;
-use relay_substrate_client::SimpleRuntimeVersion;
-use relay_westend_client::Westend;
-
-impl CliChain for Westend {
-	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
-		Some(SimpleRuntimeVersion { spec_version: 1_008_000, transaction_version: 24 });
-}
-
-impl CliChain for BridgeHubWestend {
-	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
-		Some(SimpleRuntimeVersion { spec_version: 1_008_000, transaction_version: 4 });
-}

bridges/relays/bin-substrate/src/cli/chain_schema.rs

@@ -12,248 +12,12 @@
 // 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/>.
 
-use relay_substrate_client::{AccountKeyPairOf, ChainWithTransactions};
-use structopt::StructOpt;
-use strum::{EnumString, VariantNames};
-
-use crate::cli::CliChain;
-pub use relay_substrate_client::{ChainRuntimeVersion, SimpleRuntimeVersion};
-use substrate_relay_helper::TransactionParams;
-
-#[doc = "Runtime version params."]
-#[derive(StructOpt, Debug, PartialEq, Eq, Clone, Copy, EnumString, VariantNames)]
-pub enum RuntimeVersionType {
-	/// Auto query version from chain
-	Auto,
-	/// Custom `spec_version` and `transaction_version`
-	Custom,
-	/// Read version from bundle dependencies directly.
-	Bundle,
-}
-
-/// Create chain-specific set of runtime version parameters.
-#[macro_export]
-macro_rules! declare_chain_runtime_version_params_cli_schema {
-	($chain:ident, $chain_prefix:ident) => {
-		bp_runtime::paste::item! {
-			#[doc = $chain " runtime version params."]
-			#[derive(StructOpt, Debug, PartialEq, Eq, Clone, Copy)]
-			pub struct [<$chain RuntimeVersionParams>] {
-				#[doc = "The type of runtime version for chain " $chain]
-				#[structopt(long, default_value = "Bundle")]
-				pub [<$chain_prefix _version_mode>]: RuntimeVersionType,
-				#[doc = "The custom sepc_version for chain " $chain]
-				#[structopt(long)]
-				pub [<$chain_prefix _spec_version>]: Option<u32>,
-				#[doc = "The custom transaction_version for chain " $chain]
-				#[structopt(long)]
-				pub [<$chain_prefix _transaction_version>]: Option<u32>,
-			}
-
-			impl [<$chain RuntimeVersionParams>] {
-				/// Converts self into `ChainRuntimeVersion`.
-				pub fn into_runtime_version(
-					self,
-					bundle_runtime_version: Option<SimpleRuntimeVersion>,
-				) -> anyhow::Result<ChainRuntimeVersion> {
-					Ok(match self.[<$chain_prefix _version_mode>] {
-						RuntimeVersionType::Auto => ChainRuntimeVersion::Auto,
-						RuntimeVersionType::Custom => {
-							let custom_spec_version = self.[<$chain_prefix _spec_version>]
-								.ok_or_else(|| anyhow::Error::msg(format!("The {}-spec-version is required when choose custom mode", stringify!($chain_prefix))))?;
-							let custom_transaction_version = self.[<$chain_prefix _transaction_version>]
-								.ok_or_else(|| anyhow::Error::msg(format!("The {}-transaction-version is required when choose custom mode", stringify!($chain_prefix))))?;
-							ChainRuntimeVersion::Custom(
-								SimpleRuntimeVersion {
-									spec_version: custom_spec_version,
-									transaction_version: custom_transaction_version
-								}
-							)
-						},
-						RuntimeVersionType::Bundle => match bundle_runtime_version {
-							Some(runtime_version) => ChainRuntimeVersion::Custom(runtime_version),
-							None => {
-								return Err(anyhow::format_err!("Cannot use bundled runtime version of {}: it is not known to the relay", stringify!($chain_prefix)));
-							}
-						},
-					})
-				}
-			}
-		}
-	};
-}
-
-/// Create chain-specific set of runtime version parameters.
-#[macro_export]
-macro_rules! declare_chain_connection_params_cli_schema {
-	($chain:ident, $chain_prefix:ident) => {
-		bp_runtime::paste::item! {
-			#[doc = $chain " connection params."]
-			#[derive(StructOpt, Debug, PartialEq, Eq, Clone)]
-			pub struct [<$chain ConnectionParams>] {
-				#[doc = "Connect to " $chain " node at given host."]
-				#[structopt(long, default_value = "127.0.0.1")]
-				pub [<$chain_prefix _host>]: String,
-				#[doc = "Connect to " $chain " node websocket server at given port."]
-				#[structopt(long, default_value = "9944")]
-				pub [<$chain_prefix _port>]: u16,
-				#[doc = "Use secure websocket connection."]
-				#[structopt(long)]
-				pub [<$chain_prefix _secure>]: bool,
-				#[doc = "Custom runtime version"]
-				#[structopt(flatten)]
-				pub [<$chain_prefix _runtime_version>]: [<$chain RuntimeVersionParams>],
-			}
-
-			impl [<$chain ConnectionParams>] {
-				/// Convert connection params into Substrate client.
-				#[allow(dead_code)]
-				pub async fn into_client<Chain: CliChain>(
-					self,
-				) -> anyhow::Result<relay_substrate_client::Client<Chain>> {
-					let chain_runtime_version = self
-						.[<$chain_prefix _runtime_version>]
-						.into_runtime_version(Chain::RUNTIME_VERSION)?;
-					Ok(relay_substrate_client::Client::new(relay_substrate_client::ConnectionParams {
-						host: self.[<$chain_prefix _host>],
-						port: self.[<$chain_prefix _port>],
-						secure: self.[<$chain_prefix _secure>],
-						chain_runtime_version,
-					})
-					.await
-					)
-				}
-			}
-		}
-	};
-}
-
-/// Create chain-specific set of signing parameters.
-#[macro_export]
-macro_rules! declare_chain_signing_params_cli_schema {
-	($chain:ident, $chain_prefix:ident) => {
-		bp_runtime::paste::item! {
-			#[doc = $chain " signing params."]
-			#[derive(StructOpt, Debug, PartialEq, Eq, Clone)]
-			pub struct [<$chain SigningParams>] {
-				#[doc = "The SURI of secret key to use when transactions are submitted to the " $chain " node."]
-				#[structopt(long)]
-				pub [<$chain_prefix _signer>]: Option<String>,
-				#[doc = "The password for the SURI of secret key to use when transactions are submitted to the " $chain " node."]
-				#[structopt(long)]
-				pub [<$chain_prefix _signer_password>]: Option<String>,
-
-				#[doc = "Path to the file, that contains SURI of secret key to use when transactions are submitted to the " $chain " node. Can be overridden with " $chain_prefix "_signer option."]
-				#[structopt(long)]
-				pub [<$chain_prefix _signer_file>]: Option<std::path::PathBuf>,
-				#[doc = "Path to the file, that password for the SURI of secret key to use when transactions are submitted to the " $chain " node. Can be overridden with " $chain_prefix "_signer_password option."]
-				#[structopt(long)]
-				pub [<$chain_prefix _signer_password_file>]: Option<std::path::PathBuf>,
-
-				#[doc = "Transactions mortality period, in blocks. MUST be a power of two in [4; 65536] range. MAY NOT be larger than `BlockHashCount` parameter of the chain system module."]
-				#[structopt(long)]
-				pub [<$chain_prefix _transactions_mortality>]: Option<u32>,
-			}
-
-			impl [<$chain SigningParams>] {
-				/// Return transactions mortality.
-				#[allow(dead_code)]
-				pub fn transactions_mortality(&self) -> anyhow::Result<Option<u32>> {
-					self.[<$chain_prefix _transactions_mortality>]
-						.map(|transactions_mortality| {
-							if !(4..=65536).contains(&transactions_mortality)
-								|| !transactions_mortality.is_power_of_two()
-							{
-								Err(anyhow::format_err!(
-									"Transactions mortality {} is not a power of two in a [4; 65536] range",
-									transactions_mortality,
-								))
-							} else {
-								Ok(transactions_mortality)
-							}
-						})
-						.transpose()
-				}
-
-				/// Parse signing params into chain-specific KeyPair.
-				#[allow(dead_code)]
-				pub fn to_keypair<Chain: ChainWithTransactions>(&self) -> anyhow::Result<AccountKeyPairOf<Chain>> {
-					let suri = match (self.[<$chain_prefix _signer>].as_ref(), self.[<$chain_prefix _signer_file>].as_ref()) {
-						(Some(suri), _) => suri.to_owned(),
-						(None, Some(suri_file)) => std::fs::read_to_string(suri_file)
-							.map_err(|err| anyhow::format_err!(
-								"Failed to read SURI from file {:?}: {}",
-								suri_file,
-								err,
-							))?,
-						(None, None) => return Err(anyhow::format_err!(
-							"One of options must be specified: '{}' or '{}'",
-							stringify!([<$chain_prefix _signer>]),
-							stringify!([<$chain_prefix _signer_file>]),
-						)),
-					};
-
-					let suri_password = match (
-						self.[<$chain_prefix _signer_password>].as_ref(),
-						self.[<$chain_prefix _signer_password_file>].as_ref(),
-					) {
-						(Some(suri_password), _) => Some(suri_password.to_owned()),
-						(None, Some(suri_password_file)) => std::fs::read_to_string(suri_password_file)
-							.map(Some)
-							.map_err(|err| anyhow::format_err!(
-								"Failed to read SURI password from file {:?}: {}",
-								suri_password_file,
-								err,
-							))?,
-						_ => None,
-					};
-
-					use sp_core::crypto::Pair;
-
-					AccountKeyPairOf::<Chain>::from_string(
-						&suri,
-						suri_password.as_deref()
-					).map_err(|e| anyhow::format_err!("{:?}", e))
-				}
-
-				/// Return transaction parameters.
-				#[allow(dead_code)]
-				pub fn transaction_params<Chain: ChainWithTransactions>(
-					&self,
-				) -> anyhow::Result<TransactionParams<AccountKeyPairOf<Chain>>> {
-					Ok(TransactionParams {
-						mortality: self.transactions_mortality()?,
-						signer: self.to_keypair::<Chain>()?,
-					})
-				}
-			}
-		}
-	};
-}
-
-/// Create chain-specific set of configuration objects: connection parameters,
-/// signing parameters and bridge initialization parameters.
-#[macro_export]
-macro_rules! declare_chain_cli_schema {
-	($chain:ident, $chain_prefix:ident) => {
-		$crate::declare_chain_runtime_version_params_cli_schema!($chain, $chain_prefix);
-		$crate::declare_chain_connection_params_cli_schema!($chain, $chain_prefix);
-		$crate::declare_chain_signing_params_cli_schema!($chain, $chain_prefix);
-	};
-}
-
-declare_chain_cli_schema!(Source, source);
-declare_chain_cli_schema!(Target, target);
-declare_chain_cli_schema!(Relaychain, relaychain);
-declare_chain_cli_schema!(Parachain, parachain);
-
 #[cfg(test)]
 mod tests {
-	use super::*;
 	use sp_core::Pair;
+	use substrate_relay_helper::cli::chain_schema::TargetSigningParams;
 
 	#[test]
 	fn reads_suri_from_file() {

bridges/relays/bin-substrate/src/cli/detect_equivocations.rs

@@ -14,8 +14,7 @@
 // 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/>.
 
-use crate::{
+use crate::bridges::{
-	bridges::{
 	kusama_polkadot::{
 		kusama_headers_to_bridge_hub_polkadot::KusamaToBridgeHubPolkadotCliBridge,
 		polkadot_headers_to_bridge_hub_kusama::PolkadotToBridgeHubKusamaCliBridge,
@@ -24,15 +23,14 @@ use crate::{
 		rococo_headers_to_bridge_hub_westend::RococoToBridgeHubWestendCliBridge,
 		westend_headers_to_bridge_hub_rococo::WestendToBridgeHubRococoCliBridge,
 	},
-	},
-	cli::{bridge::*, chain_schema::*, PrometheusParams},
 };
 
-use async_trait::async_trait;
-use relay_substrate_client::ChainWithTransactions;
 use structopt::StructOpt;
 use strum::{EnumString, VariantNames};
-use substrate_relay_helper::{equivocation, equivocation::SubstrateEquivocationDetectionPipeline};
+
+use substrate_relay_helper::cli::detect_equivocations::{
+	DetectEquivocationsParams, EquivocationsDetector,
+};
 
 /// Start equivocation detection loop.
 #[derive(StructOpt)]
@@ -40,13 +38,7 @@ pub struct DetectEquivocations {
 	#[structopt(possible_values = DetectEquivocationsBridge::VARIANTS, case_insensitive = true)]
 	bridge: DetectEquivocationsBridge,
 	#[structopt(flatten)]
-	source: SourceConnectionParams,
+	params: DetectEquivocationsParams,
-	#[structopt(flatten)]
-	source_sign: SourceSigningParams,
-	#[structopt(flatten)]
-	target: TargetConnectionParams,
-	#[structopt(flatten)]
-	prometheus_params: PrometheusParams,
 }
 
 #[derive(Debug, EnumString, VariantNames)]
@@ -59,29 +51,6 @@ pub enum DetectEquivocationsBridge {
 	WestendToBridgeHubRococo,
 }
 
-#[async_trait]
-trait EquivocationsDetector: RelayToRelayEquivocationDetectionCliBridge
-where
-	Self::Source: ChainWithTransactions,
-{
-	async fn start(data: DetectEquivocations) -> anyhow::Result<()> {
-		let source_client = data.source.into_client::<Self::Source>().await?;
-		Self::Equivocation::start_relay_guards(
-			&source_client,
-			source_client.can_start_version_guard(),
-		)
-		.await?;
-
-		equivocation::run::<Self::Equivocation>(
-			source_client,
-			data.target.into_client::<Self::Target>().await?,
-			data.source_sign.transaction_params::<Self::Source>()?,
-			data.prometheus_params.into_metrics_params()?,
-		)
-		.await
-	}
-}
-
 impl EquivocationsDetector for KusamaToBridgeHubPolkadotCliBridge {}
 impl EquivocationsDetector for PolkadotToBridgeHubKusamaCliBridge {}
 impl EquivocationsDetector for RococoToBridgeHubWestendCliBridge {}
@@ -92,13 +61,13 @@ impl DetectEquivocations {
 	pub async fn run(self) -> anyhow::Result<()> {
 		match self.bridge {
 			DetectEquivocationsBridge::KusamaToBridgeHubPolkadot =>
-				KusamaToBridgeHubPolkadotCliBridge::start(self),
+				KusamaToBridgeHubPolkadotCliBridge::start(self.params),
 			DetectEquivocationsBridge::PolkadotToBridgeHubKusama =>
-				PolkadotToBridgeHubKusamaCliBridge::start(self),
+				PolkadotToBridgeHubKusamaCliBridge::start(self.params),
 			DetectEquivocationsBridge::RococoToBridgeHubWestend =>
-				RococoToBridgeHubWestendCliBridge::start(self),
+				RococoToBridgeHubWestendCliBridge::start(self.params),
 			DetectEquivocationsBridge::WestendToBridgeHubRococo =>
-				WestendToBridgeHubRococoCliBridge::start(self),
+				WestendToBridgeHubRococoCliBridge::start(self.params),
 		}
 		.await
 	}

bridges/relays/bin-substrate/src/cli/init_bridge.rs

@@ -14,11 +14,7 @@
 // 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/>.
 
-use async_trait::async_trait;
+use crate::bridges::{
-use codec::Encode;
-
-use crate::{
-	bridges::{
 	kusama_polkadot::{
 		kusama_headers_to_bridge_hub_polkadot::KusamaToBridgeHubPolkadotCliBridge,
 		polkadot_headers_to_bridge_hub_kusama::PolkadotToBridgeHubKusamaCliBridge,
@@ -35,86 +31,14 @@ use crate::{
 		rococo_headers_to_bridge_hub_westend::RococoToBridgeHubWestendCliBridge,
 		westend_headers_to_bridge_hub_rococo::WestendToBridgeHubRococoCliBridge,
 	},
-	},
-	cli::{bridge::CliBridgeBase, chain_schema::*},
 };
-use bp_runtime::Chain as ChainBase;
+use relay_substrate_client::Chain;
-use relay_substrate_client::{AccountKeyPairOf, Chain, UnsignedTransaction};
-use sp_core::Pair;
 use structopt::StructOpt;
 use strum::{EnumString, VariantNames};
-use substrate_relay_helper::finality_base::engine::{Engine, Grandpa as GrandpaFinalityEngine};
+use substrate_relay_helper::{
-
+	cli::init_bridge::{BridgeInitializer, InitBridgeParams},
-/// Initialize bridge pallet.
+	finality_base::engine::{Engine, Grandpa as GrandpaFinalityEngine},
-#[derive(StructOpt)]
+};
-pub struct InitBridge {
-	/// A bridge instance to initialize.
-	#[structopt(possible_values = InitBridgeName::VARIANTS, case_insensitive = true)]
-	bridge: InitBridgeName,
-	#[structopt(flatten)]
-	source: SourceConnectionParams,
-	#[structopt(flatten)]
-	target: TargetConnectionParams,
-	#[structopt(flatten)]
-	target_sign: TargetSigningParams,
-	/// Generates all required data, but does not submit extrinsic
-	#[structopt(long)]
-	dry_run: bool,
-}
-
-#[derive(Debug, EnumString, VariantNames)]
-#[strum(serialize_all = "kebab_case")]
-/// Bridge to initialize.
-pub enum InitBridgeName {
-	KusamaToBridgeHubPolkadot,
-	PolkadotToBridgeHubKusama,
-	PolkadotToPolkadotBulletin,
-	PolkadotBulletinToBridgeHubPolkadot,
-	RococoToRococoBulletin,
-	RococoBulletinToBridgeHubRococo,
-	RococoToBridgeHubWestend,
-	WestendToBridgeHubRococo,
-}
-
-#[async_trait]
-trait BridgeInitializer: CliBridgeBase
-where
-	<Self::Target as ChainBase>::AccountId: From<<AccountKeyPairOf<Self::Target> as Pair>::Public>,
-{
-	type Engine: Engine<Self::Source>;
-
-	/// Get the encoded call to init the bridge.
-	fn encode_init_bridge(
-		init_data: <Self::Engine as Engine<Self::Source>>::InitializationData,
-	) -> <Self::Target as Chain>::Call;
-
-	/// Initialize the bridge.
-	async fn init_bridge(data: InitBridge) -> anyhow::Result<()> {
-		let source_client = data.source.into_client::<Self::Source>().await?;
-		let target_client = data.target.into_client::<Self::Target>().await?;
-		let target_sign = data.target_sign.to_keypair::<Self::Target>()?;
-		let dry_run = data.dry_run;
-
-		substrate_relay_helper::finality::initialize::initialize::<Self::Engine, _, _, _>(
-			source_client,
-			target_client.clone(),
-			target_sign,
-			move |transaction_nonce, initialization_data| {
-				let call = Self::encode_init_bridge(initialization_data);
-				log::info!(
-					target: "bridge",
-					"Initialize bridge call encoded as hex string: {:?}",
-					format!("0x{}", hex::encode(call.encode()))
-				);
-				Ok(UnsignedTransaction::new(call.into(), transaction_nonce))
-			},
-			dry_run,
-		)
-		.await;
-
-		Ok(())
-	}
-}
 
 impl BridgeInitializer for RococoToBridgeHubWestendCliBridge {
 	type Engine = GrandpaFinalityEngine<Self::Source>;
@@ -225,26 +149,50 @@ impl BridgeInitializer for RococoBulletinToBridgeHubRococoCliBridge {
 	}
 }
 
+/// Initialize bridge pallet.
+#[derive(StructOpt)]
+pub struct InitBridge {
+	/// A bridge instance to initialize.
+	#[structopt(possible_values = InitBridgeName::VARIANTS, case_insensitive = true)]
+	bridge: InitBridgeName,
+	#[structopt(flatten)]
+	params: InitBridgeParams,
+}
+
+#[derive(Debug, EnumString, VariantNames)]
+#[strum(serialize_all = "kebab_case")]
+/// Bridge to initialize.
+pub enum InitBridgeName {
+	KusamaToBridgeHubPolkadot,
+	PolkadotToBridgeHubKusama,
+	PolkadotToPolkadotBulletin,
+	PolkadotBulletinToBridgeHubPolkadot,
+	RococoToRococoBulletin,
+	RococoBulletinToBridgeHubRococo,
+	RococoToBridgeHubWestend,
+	WestendToBridgeHubRococo,
+}
+
 impl InitBridge {
 	/// Run the command.
 	pub async fn run(self) -> anyhow::Result<()> {
 		match self.bridge {
 			InitBridgeName::KusamaToBridgeHubPolkadot =>
-				KusamaToBridgeHubPolkadotCliBridge::init_bridge(self),
+				KusamaToBridgeHubPolkadotCliBridge::init_bridge(self.params),
 			InitBridgeName::PolkadotToBridgeHubKusama =>
-				PolkadotToBridgeHubKusamaCliBridge::init_bridge(self),
+				PolkadotToBridgeHubKusamaCliBridge::init_bridge(self.params),
 			InitBridgeName::PolkadotToPolkadotBulletin =>
-				PolkadotToPolkadotBulletinCliBridge::init_bridge(self),
+				PolkadotToPolkadotBulletinCliBridge::init_bridge(self.params),
 			InitBridgeName::PolkadotBulletinToBridgeHubPolkadot =>
-				PolkadotBulletinToBridgeHubPolkadotCliBridge::init_bridge(self),
+				PolkadotBulletinToBridgeHubPolkadotCliBridge::init_bridge(self.params),
 			InitBridgeName::RococoToRococoBulletin =>
-				RococoToRococoBulletinCliBridge::init_bridge(self),
+				RococoToRococoBulletinCliBridge::init_bridge(self.params),
 			InitBridgeName::RococoBulletinToBridgeHubRococo =>
-				RococoBulletinToBridgeHubRococoCliBridge::init_bridge(self),
+				RococoBulletinToBridgeHubRococoCliBridge::init_bridge(self.params),
 			InitBridgeName::RococoToBridgeHubWestend =>
-				RococoToBridgeHubWestendCliBridge::init_bridge(self),
+				RococoToBridgeHubWestendCliBridge::init_bridge(self.params),
 			InitBridgeName::WestendToBridgeHubRococo =>
-				WestendToBridgeHubRococoCliBridge::init_bridge(self),
+				WestendToBridgeHubRococoCliBridge::init_bridge(self.params),
 		}
 		.await
 	}

bridges/relays/bin-substrate/src/cli/mod.rs

@@ -17,18 +17,10 @@
 //! Deal with CLI args of substrate-to-substrate relay.
 
 use async_std::prelude::*;
-use codec::{Decode, Encode};
 use futures::{select, FutureExt};
-use rbtag::BuildInfo;
 use signal_hook::consts::*;
 use signal_hook_async_std::Signals;
-use structopt::{clap::arg_enum, StructOpt};
+use structopt::StructOpt;
-use strum::{EnumString, VariantNames};
-
-use bp_messages::LaneId;
-use relay_substrate_client::SimpleRuntimeVersion;
-
-pub(crate) mod bridge;
 
 mod chain_schema;
 mod detect_equivocations;
@@ -50,11 +42,17 @@ pub fn parse_args() -> Command {
 #[derive(StructOpt)]
 #[structopt(about = "Substrate-to-Substrate relay")]
 pub enum Command {
+	/// Initialize on-chain bridge pallet with current header data.
+	///
+	/// Sends initialization transaction to bootstrap the bridge with current finalized block data.
+	InitBridge(init_bridge::InitBridge),
 	/// Start headers relay between two chains.
 	///
 	/// The on-chain bridge component should have been already initialized with
 	/// `init-bridge` sub-command.
 	RelayHeaders(relay_headers::RelayHeaders),
+	/// Relay parachain heads.
+	RelayParachains(relay_parachains::RelayParachains),
 	/// Start messages relay between two chains.
 	///
 	/// Ties up to `Messages` pallets on both chains and starts relaying messages.
@@ -67,12 +65,6 @@ pub enum Command {
 	/// the message relays - i.e. when there are messages or confirmations that needs to be
 	/// relayed between chains.
 	RelayHeadersAndMessages(Box<relay_headers_and_messages::RelayHeadersAndMessages>),
-	/// Initialize on-chain bridge pallet with current header data.
-	///
-	/// Sends initialization transaction to bootstrap the bridge with current finalized block data.
-	InitBridge(init_bridge::InitBridge),
-	/// Relay parachain heads.
-	RelayParachains(relay_parachains::RelayParachains),
 	/// Detect and report equivocations.
 	///
 	/// Parses the source chain headers that were synchronized with the target chain looking for
@@ -86,10 +78,10 @@ impl Command {
 		use relay_utils::initialize::{initialize_logger, initialize_relay};
 
 		match self {
+			Self::InitBridge(_) |
 			Self::RelayHeaders(_) |
 			Self::RelayMessages(_) |
-			Self::RelayHeadersAndMessages(_) |
+			Self::RelayHeadersAndMessages(_) => {
-			Self::InitBridge(_) => {
 				initialize_relay();
 			},
 			_ => {
@@ -101,11 +93,11 @@ impl Command {
 	/// Run the command.
 	async fn do_run(self) -> anyhow::Result<()> {
 		match self {
+			Self::InitBridge(arg) => arg.run().await?,
 			Self::RelayHeaders(arg) => arg.run().await?,
+			Self::RelayParachains(arg) => arg.run().await?,
 			Self::RelayMessages(arg) => arg.run().await?,
 			Self::RelayHeadersAndMessages(arg) => arg.run().await?,
-			Self::InitBridge(arg) => arg.run().await?,
-			Self::RelayParachains(arg) => arg.run().await?,
 			Self::DetectEquivocations(arg) => arg.run().await?,
 		}
 		Ok(())
@@ -137,181 +129,3 @@ impl Command {
 		}
 	}
 }
-
-arg_enum! {
-	#[derive(Debug)]
-	/// The origin to use when dispatching the message on the target chain.
-	///
-	/// - `Target` uses account existing on the target chain (requires target private key).
-	/// - `Origin` uses account derived from the source-chain account.
-	pub enum Origins {
-		Target,
-		Source,
-	}
-}
-
-/// Bridge-supported network definition.
-///
-/// Used to abstract away CLI commands.
-pub trait CliChain: relay_substrate_client::Chain {
-	/// Current version of the chain runtime, known to relay.
-	///
-	/// can be `None` if relay is not going to submit transactions to that chain.
-	const RUNTIME_VERSION: Option<SimpleRuntimeVersion>;
-}
-
-/// Lane id.
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct HexLaneId(pub [u8; 4]);
-
-impl From<HexLaneId> for LaneId {
-	fn from(lane_id: HexLaneId) -> LaneId {
-		LaneId(lane_id.0)
-	}
-}
-
-impl std::str::FromStr for HexLaneId {
-	type Err = hex::FromHexError;
-
-	fn from_str(s: &str) -> Result<Self, Self::Err> {
-		let mut lane_id = [0u8; 4];
-		hex::decode_to_slice(s, &mut lane_id)?;
-		Ok(HexLaneId(lane_id))
-	}
-}
-
-/// Nicer formatting for raw bytes vectors.
-#[derive(Default, Encode, Decode, PartialEq, Eq)]
-pub struct HexBytes(pub Vec<u8>);
-
-impl std::str::FromStr for HexBytes {
-	type Err = hex::FromHexError;
-
-	fn from_str(s: &str) -> Result<Self, Self::Err> {
-		Ok(Self(hex::decode(s)?))
-	}
-}
-
-impl std::fmt::Debug for HexBytes {
-	fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
-		write!(fmt, "0x{self}")
-	}
-}
-
-impl std::fmt::Display for HexBytes {
-	fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
-		write!(fmt, "{}", hex::encode(&self.0))
-	}
-}
-
-/// Prometheus metrics params.
-#[derive(Clone, Debug, PartialEq, StructOpt)]
-pub struct PrometheusParams {
-	/// Do not expose a Prometheus metric endpoint.
-	#[structopt(long)]
-	pub no_prometheus: bool,
-	/// Expose Prometheus endpoint at given interface.
-	#[structopt(long, default_value = "127.0.0.1")]
-	pub prometheus_host: String,
-	/// Expose Prometheus endpoint at given port.
-	#[structopt(long, default_value = "9616")]
-	pub prometheus_port: u16,
-}
-
-/// Struct to get git commit info and build time.
-#[derive(BuildInfo)]
-struct SubstrateRelayBuildInfo;
-
-impl SubstrateRelayBuildInfo {
-	/// Get git commit in form `<short-sha-(clean|dirty)>`.
-	pub fn get_git_commit() -> String {
-		// on gitlab we use images without git installed, so we can't use `rbtag` there
-		// locally we don't have `CI_*` env variables, so we can't rely on them
-		// => we are using `CI_*` env variables or else `rbtag`
-		let maybe_sha_from_ci = option_env!("CI_COMMIT_SHORT_SHA");
-		maybe_sha_from_ci
-			.map(|short_sha| {
-				// we assume that on CI the copy is always clean
-				format!("{short_sha}-clean")
-			})
-			.unwrap_or_else(|| SubstrateRelayBuildInfo.get_build_commit().into())
-	}
-}
-
-impl PrometheusParams {
-	/// Tries to convert CLI metrics params into metrics params, used by the relay.
-	pub fn into_metrics_params(self) -> anyhow::Result<relay_utils::metrics::MetricsParams> {
-		let metrics_address = if !self.no_prometheus {
-			Some(relay_utils::metrics::MetricsAddress {
-				host: self.prometheus_host,
-				port: self.prometheus_port,
-			})
-		} else {
-			None
-		};
-
-		let relay_version = option_env!("CARGO_PKG_VERSION").unwrap_or("unknown");
-		let relay_commit = SubstrateRelayBuildInfo::get_git_commit();
-		relay_utils::metrics::MetricsParams::new(
-			metrics_address,
-			relay_version.into(),
-			relay_commit,
-		)
-		.map_err(|e| anyhow::format_err!("{:?}", e))
-	}
-}
-
-/// Either explicit or maximal allowed value.
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub enum ExplicitOrMaximal<V> {
-	/// User has explicitly specified argument value.
-	Explicit(V),
-	/// Maximal allowed value for this argument.
-	Maximal,
-}
-
-impl<V: std::str::FromStr> std::str::FromStr for ExplicitOrMaximal<V>
-where
-	V::Err: std::fmt::Debug,
-{
-	type Err = String;
-
-	fn from_str(s: &str) -> Result<Self, Self::Err> {
-		if s.to_lowercase() == "max" {
-			return Ok(ExplicitOrMaximal::Maximal)
-		}
-
-		V::from_str(s)
-			.map(ExplicitOrMaximal::Explicit)
-			.map_err(|e| format!("Failed to parse '{e:?}'. Expected 'max' or explicit value"))
-	}
-}
-
-#[doc = "Runtime version params."]
-#[derive(StructOpt, Debug, PartialEq, Eq, Clone, Copy, EnumString, VariantNames)]
-pub enum RuntimeVersionType {
-	/// Auto query version from chain
-	Auto,
-	/// Custom `spec_version` and `transaction_version`
-	Custom,
-	/// Read version from bundle dependencies directly.
-	Bundle,
-}
-
-#[cfg(test)]
-mod tests {
-	use super::*;
-
-	#[test]
-	fn hex_bytes_display_matches_from_str_for_clap() {
-		// given
-		let hex = HexBytes(vec![1, 2, 3, 4]);
-		let display = format!("{hex}");
-
-		// when
-		let hex2: HexBytes = display.parse().unwrap();
-
-		// then
-		assert_eq!(hex.0, hex2.0);
-	}
-}

bridges/relays/bin-substrate/src/cli/relay_headers.rs

@@ -14,7 +14,6 @@
 // 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/>.
 
-use async_trait::async_trait;
 use structopt::StructOpt;
 use strum::{EnumString, VariantNames};
 
@@ -32,10 +31,8 @@ use crate::bridges::{
 		rococo_headers_to_rococo_bulletin::RococoToRococoBulletinCliBridge,
 	},
 };
-use relay_utils::metrics::{GlobalMetrics, StandaloneMetric};
-use substrate_relay_helper::finality::SubstrateFinalitySyncPipeline;
 
-use crate::cli::{bridge::*, chain_schema::*, PrometheusParams};
+use substrate_relay_helper::cli::relay_headers::{HeadersRelayer, RelayHeadersParams};
 
 /// Start headers relayer process.
 #[derive(StructOpt)]
@@ -43,18 +40,8 @@ pub struct RelayHeaders {
 	/// A bridge instance to relay headers for.
 	#[structopt(possible_values = RelayHeadersBridge::VARIANTS, case_insensitive = true)]
 	bridge: RelayHeadersBridge,
-	/// If passed, only mandatory headers (headers that are changing the GRANDPA authorities set)
-	/// are relayed.
-	#[structopt(long)]
-	only_mandatory_headers: bool,
 	#[structopt(flatten)]
-	source: SourceConnectionParams,
+	params: RelayHeadersParams,
-	#[structopt(flatten)]
-	target: TargetConnectionParams,
-	#[structopt(flatten)]
-	target_sign: TargetSigningParams,
-	#[structopt(flatten)]
-	prometheus_params: PrometheusParams,
 }
 
 #[derive(Debug, EnumString, VariantNames)]
@@ -69,37 +56,6 @@ pub enum RelayHeadersBridge {
 	RococoBulletinToBridgeHubRococo,
 }
 
-#[async_trait]
-trait HeadersRelayer: RelayToRelayHeadersCliBridge {
-	/// Relay headers.
-	async fn relay_headers(data: RelayHeaders) -> anyhow::Result<()> {
-		let source_client = data.source.into_client::<Self::Source>().await?;
-		let target_client = data.target.into_client::<Self::Target>().await?;
-		let target_transactions_mortality = data.target_sign.target_transactions_mortality;
-		let target_sign = data.target_sign.to_keypair::<Self::Target>()?;
-
-		let metrics_params: relay_utils::metrics::MetricsParams =
-			data.prometheus_params.into_metrics_params()?;
-		GlobalMetrics::new()?.register_and_spawn(&metrics_params.registry)?;
-
-		let target_transactions_params = substrate_relay_helper::TransactionParams {
-			signer: target_sign,
-			mortality: target_transactions_mortality,
-		};
-		Self::Finality::start_relay_guards(&target_client, target_client.can_start_version_guard())
-			.await?;
-
-		substrate_relay_helper::finality::run::<Self::Finality>(
-			source_client,
-			target_client,
-			data.only_mandatory_headers,
-			target_transactions_params,
-			metrics_params,
-		)
-		.await
-	}
-}
-
 impl HeadersRelayer for KusamaToBridgeHubPolkadotCliBridge {}
 impl HeadersRelayer for PolkadotToBridgeHubKusamaCliBridge {}
 impl HeadersRelayer for PolkadotToPolkadotBulletinCliBridge {}
@@ -112,17 +68,17 @@ impl RelayHeaders {
 	pub async fn run(self) -> anyhow::Result<()> {
 		match self.bridge {
 			RelayHeadersBridge::KusamaToBridgeHubPolkadot =>
-				KusamaToBridgeHubPolkadotCliBridge::relay_headers(self),
+				KusamaToBridgeHubPolkadotCliBridge::relay_headers(self.params),
 			RelayHeadersBridge::PolkadotToBridgeHubKusama =>
-				PolkadotToBridgeHubKusamaCliBridge::relay_headers(self),
+				PolkadotToBridgeHubKusamaCliBridge::relay_headers(self.params),
 			RelayHeadersBridge::PolkadotToPolkadotBulletin =>
-				PolkadotToPolkadotBulletinCliBridge::relay_headers(self),
+				PolkadotToPolkadotBulletinCliBridge::relay_headers(self.params),
 			RelayHeadersBridge::PolkadotBulletinToBridgeHubPolkadot =>
-				PolkadotBulletinToBridgeHubPolkadotCliBridge::relay_headers(self),
+				PolkadotBulletinToBridgeHubPolkadotCliBridge::relay_headers(self.params),
 			RelayHeadersBridge::RococoToRococoBulletin =>
-				RococoToRococoBulletinCliBridge::relay_headers(self),
+				RococoToRococoBulletinCliBridge::relay_headers(self.params),
 			RelayHeadersBridge::RococoBulletinToBridgeHubRococo =>
-				RococoBulletinToBridgeHubRococoCliBridge::relay_headers(self),
+				RococoBulletinToBridgeHubRococoCliBridge::relay_headers(self.params),
 		}
 		.await
 	}

bridges/relays/bin-substrate/src/cli/relay_headers_and_messages.rs

@@ -23,22 +23,10 @@
 //!    `declare_chain_to_parachain_bridge_schema` for the bridge.
 //! 3) declare a new struct for the added bridge and implement the `Full2WayBridge` trait for it.
 
-#[macro_use]
-mod parachain_to_parachain;
-#[macro_use]
-mod relay_to_relay;
-#[macro_use]
-mod relay_to_parachain;
-
 use async_trait::async_trait;
-use std::{marker::PhantomData, sync::Arc};
 use structopt::StructOpt;
 
-use futures::{FutureExt, TryFutureExt};
+use crate::bridges::{
-use relay_to_parachain::*;
-
-use crate::{
-	bridges::{
 	kusama_polkadot::{
 		kusama_parachains_to_bridge_hub_polkadot::BridgeHubKusamaToBridgeHubPolkadotCliBridge,
 		polkadot_parachains_to_bridge_hub_kusama::BridgeHubPolkadotToBridgeHubKusamaCliBridge,
@@ -56,143 +44,27 @@ use crate::{
 		rococo_parachains_to_bridge_hub_westend::BridgeHubRococoToBridgeHubWestendCliBridge,
 		westend_parachains_to_bridge_hub_rococo::BridgeHubWestendToBridgeHubRococoCliBridge,
 	},
-	},
+};
+use relay_substrate_client::{
+	AccountKeyPairOf, ChainRuntimeVersion, ChainWithRuntimeVersion, ChainWithTransactions,
+	Parachain, SimpleRuntimeVersion,
+};
+use substrate_relay_helper::{
 	cli::{
 		bridge::{
 			CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge,
 			RelayToRelayHeadersCliBridge,
 		},
 		chain_schema::*,
-		relay_headers_and_messages::parachain_to_parachain::ParachainToParachainBridge,
+		relay_headers_and_messages::{
-		CliChain, HexLaneId, PrometheusParams,
+			parachain_to_parachain::ParachainToParachainBridge, relay_to_parachain::*,
+			BridgeEndCommonParams, Full2WayBridge, Full2WayBridgeCommonParams,
+			HeadersAndMessagesSharedParams,
 		},
-	declare_chain_cli_schema,
+	},
+	declare_chain_cli_schema, declare_parachain_to_parachain_bridge_schema,
+	declare_relay_to_parachain_bridge_schema, TransactionParams,
 };
-use bp_messages::LaneId;
-use bp_runtime::BalanceOf;
-use relay_substrate_client::{
-	AccountIdOf, AccountKeyPairOf, Chain, ChainWithBalances, ChainWithMessages,
-	ChainWithTransactions, Client, Parachain,
-};
-use relay_utils::metrics::MetricsParams;
-use sp_core::Pair;
-use substrate_relay_helper::{
-	messages_lane::{MessagesRelayLimits, MessagesRelayParams},
-	on_demand::OnDemandRelay,
-	TaggedAccount, TransactionParams,
-};
-
-/// Parameters that have the same names across all bridges.
-#[derive(Debug, PartialEq, StructOpt)]
-pub struct HeadersAndMessagesSharedParams {
-	/// Hex-encoded lane identifiers that should be served by the complex relay.
-	#[structopt(long, default_value = "00000000")]
-	pub lane: Vec<HexLaneId>,
-	/// If passed, only mandatory headers (headers that are changing the GRANDPA authorities set)
-	/// are relayed.
-	#[structopt(long)]
-	pub only_mandatory_headers: bool,
-	#[structopt(flatten)]
-	pub prometheus_params: PrometheusParams,
-}
-
-/// Bridge parameters, shared by all bridge types.
-pub struct Full2WayBridgeCommonParams<
-	Left: ChainWithTransactions + CliChain,
-	Right: ChainWithTransactions + CliChain,
-> {
-	/// Shared parameters.
-	pub shared: HeadersAndMessagesSharedParams,
-	/// Parameters of the left chain.
-	pub left: BridgeEndCommonParams<Left>,
-	/// Parameters of the right chain.
-	pub right: BridgeEndCommonParams<Right>,
-
-	/// Common metric parameters.
-	pub metrics_params: MetricsParams,
-}
-
-impl<Left: ChainWithTransactions + CliChain, Right: ChainWithTransactions + CliChain>
-	Full2WayBridgeCommonParams<Left, Right>
-{
-	/// Creates new bridge parameters from its components.
-	pub fn new<L2R: MessagesCliBridge<Source = Left, Target = Right>>(
-		shared: HeadersAndMessagesSharedParams,
-		left: BridgeEndCommonParams<Left>,
-		right: BridgeEndCommonParams<Right>,
-	) -> anyhow::Result<Self> {
-		// Create metrics registry.
-		let metrics_params = shared.prometheus_params.clone().into_metrics_params()?;
-		let metrics_params = relay_utils::relay_metrics(metrics_params).into_params();
-
-		Ok(Self { shared, left, right, metrics_params })
-	}
-}
-
-/// Parameters that are associated with one side of the bridge.
-pub struct BridgeEndCommonParams<Chain: ChainWithTransactions + CliChain> {
-	/// Chain client.
-	pub client: Client<Chain>,
-	/// Params used for sending transactions to the chain.
-	pub tx_params: TransactionParams<AccountKeyPairOf<Chain>>,
-	/// Accounts, which balances are exposed as metrics by the relay process.
-	pub accounts: Vec<TaggedAccount<AccountIdOf<Chain>>>,
-}
-
-/// All data of the bidirectional complex relay.
-struct FullBridge<
-	'a,
-	Source: ChainWithTransactions + CliChain,
-	Target: ChainWithTransactions + CliChain,
-	Bridge: MessagesCliBridge<Source = Source, Target = Target>,
-> {
-	source: &'a mut BridgeEndCommonParams<Source>,
-	target: &'a mut BridgeEndCommonParams<Target>,
-	metrics_params: &'a MetricsParams,
-	_phantom_data: PhantomData<Bridge>,
-}
-
-impl<
-		'a,
-		Source: ChainWithTransactions + CliChain,
-		Target: ChainWithTransactions + CliChain,
-		Bridge: MessagesCliBridge<Source = Source, Target = Target>,
-	> FullBridge<'a, Source, Target, Bridge>
-where
-	AccountIdOf<Source>: From<<AccountKeyPairOf<Source> as Pair>::Public>,
-	AccountIdOf<Target>: From<<AccountKeyPairOf<Target> as Pair>::Public>,
-	BalanceOf<Source>: TryFrom<BalanceOf<Target>> + Into<u128>,
-{
-	/// Construct complex relay given it components.
-	fn new(
-		source: &'a mut BridgeEndCommonParams<Source>,
-		target: &'a mut BridgeEndCommonParams<Target>,
-		metrics_params: &'a MetricsParams,
-	) -> Self {
-		Self { source, target, metrics_params, _phantom_data: Default::default() }
-	}
-
-	/// Returns message relay parameters.
-	fn messages_relay_params(
-		&self,
-		source_to_target_headers_relay: Arc<dyn OnDemandRelay<Source, Target>>,
-		target_to_source_headers_relay: Arc<dyn OnDemandRelay<Target, Source>>,
-		lane_id: LaneId,
-		maybe_limits: Option<MessagesRelayLimits>,
-	) -> MessagesRelayParams<Bridge::MessagesLane> {
-		MessagesRelayParams {
-			source_client: self.source.client.clone(),
-			source_transaction_params: self.source.tx_params.clone(),
-			target_client: self.target.client.clone(),
-			target_transaction_params: self.target.tx_params.clone(),
-			source_to_target_headers_relay: Some(source_to_target_headers_relay),
-			target_to_source_headers_relay: Some(target_to_source_headers_relay),
-			lane_id,
-			limits: maybe_limits,
-			metrics_params: self.metrics_params.clone().disable(),
-		}
-	}
-}
 
 // All supported chains.
 declare_chain_cli_schema!(Rococo, rococo);
@@ -247,171 +119,6 @@ declare_parachain_to_parachain_bridge_schema!(BridgeHubKusama, Kusama, BridgeHub
 declare_relay_to_parachain_bridge_schema!(PolkadotBulletin, BridgeHubPolkadot, Polkadot);
 declare_relay_to_parachain_bridge_schema!(RococoBulletin, BridgeHubRococo, Rococo);
 
-/// Base portion of the bidirectional complex relay.
-///
-/// This main purpose of extracting this trait is that in different relays the implementation
-/// of `start_on_demand_headers_relayers` method will be different. But the number of
-/// implementations is limited to relay <> relay, parachain <> relay and parachain <> parachain.
-/// This trait allows us to reuse these implementations in different bridges.
-#[async_trait]
-trait Full2WayBridgeBase: Sized + Send + Sync {
-	/// The CLI params for the bridge.
-	type Params;
-	/// The left relay chain.
-	type Left: ChainWithTransactions + CliChain;
-	/// The right destination chain (it can be a relay or a parachain).
-	type Right: ChainWithTransactions + CliChain;
-
-	/// Reference to common relay parameters.
-	fn common(&self) -> &Full2WayBridgeCommonParams<Self::Left, Self::Right>;
-
-	/// Mutable reference to common relay parameters.
-	fn mut_common(&mut self) -> &mut Full2WayBridgeCommonParams<Self::Left, Self::Right>;
-
-	/// Start on-demand headers relays.
-	async fn start_on_demand_headers_relayers(
-		&mut self,
-	) -> anyhow::Result<(
-		Arc<dyn OnDemandRelay<Self::Left, Self::Right>>,
-		Arc<dyn OnDemandRelay<Self::Right, Self::Left>>,
-	)>;
-}
-
-/// Bidirectional complex relay.
-#[async_trait]
-trait Full2WayBridge: Sized + Sync
-where
-	AccountIdOf<Self::Left>: From<<AccountKeyPairOf<Self::Left> as Pair>::Public>,
-	AccountIdOf<Self::Right>: From<<AccountKeyPairOf<Self::Right> as Pair>::Public>,
-	BalanceOf<Self::Left>: TryFrom<BalanceOf<Self::Right>> + Into<u128>,
-	BalanceOf<Self::Right>: TryFrom<BalanceOf<Self::Left>> + Into<u128>,
-{
-	/// Base portion of the bidirectional complex relay.
-	type Base: Full2WayBridgeBase<Left = Self::Left, Right = Self::Right>;
-
-	/// The left relay chain.
-	type Left: ChainWithTransactions + ChainWithBalances + ChainWithMessages + CliChain;
-	/// The right relay chain.
-	type Right: ChainWithTransactions + ChainWithBalances + ChainWithMessages + CliChain;
-
-	/// Left to Right bridge.
-	type L2R: MessagesCliBridge<Source = Self::Left, Target = Self::Right>;
-	/// Right to Left bridge
-	type R2L: MessagesCliBridge<Source = Self::Right, Target = Self::Left>;
-
-	/// Construct new bridge.
-	fn new(params: <Self::Base as Full2WayBridgeBase>::Params) -> anyhow::Result<Self>;
-
-	/// Reference to the base relay portion.
-	fn base(&self) -> &Self::Base;
-
-	/// Mutable reference to the base relay portion.
-	fn mut_base(&mut self) -> &mut Self::Base;
-
-	/// Creates and returns Left to Right complex relay.
-	fn left_to_right(&mut self) -> FullBridge<Self::Left, Self::Right, Self::L2R> {
-		let common = self.mut_base().mut_common();
-		FullBridge::<_, _, Self::L2R>::new(
-			&mut common.left,
-			&mut common.right,
-			&common.metrics_params,
-		)
-	}
-
-	/// Creates and returns Right to Left complex relay.
-	fn right_to_left(&mut self) -> FullBridge<Self::Right, Self::Left, Self::R2L> {
-		let common = self.mut_base().mut_common();
-		FullBridge::<_, _, Self::R2L>::new(
-			&mut common.right,
-			&mut common.left,
-			&common.metrics_params,
-		)
-	}
-
-	/// Start complex relay.
-	async fn run(&mut self) -> anyhow::Result<()> {
-		// Register standalone metrics.
-		{
-			let common = self.mut_base().mut_common();
-			common.left.accounts.push(TaggedAccount::Messages {
-				id: common.left.tx_params.signer.public().into(),
-				bridged_chain: Self::Right::NAME.to_string(),
-			});
-			common.right.accounts.push(TaggedAccount::Messages {
-				id: common.right.tx_params.signer.public().into(),
-				bridged_chain: Self::Left::NAME.to_string(),
-			});
-		}
-
-		// start on-demand header relays
-		let (left_to_right_on_demand_headers, right_to_left_on_demand_headers) =
-			self.mut_base().start_on_demand_headers_relayers().await?;
-
-		// add balance-related metrics
-		let lanes = self
-			.base()
-			.common()
-			.shared
-			.lane
-			.iter()
-			.cloned()
-			.map(Into::into)
-			.collect::<Vec<_>>();
-		{
-			let common = self.mut_base().mut_common();
-			substrate_relay_helper::messages_metrics::add_relay_balances_metrics::<_, Self::Right>(
-				common.left.client.clone(),
-				&common.metrics_params,
-				&common.left.accounts,
-				&lanes,
-			)
-			.await?;
-			substrate_relay_helper::messages_metrics::add_relay_balances_metrics::<_, Self::Left>(
-				common.right.client.clone(),
-				&common.metrics_params,
-				&common.right.accounts,
-				&lanes,
-			)
-			.await?;
-		}
-
-		// Need 2x capacity since we consider both directions for each lane
-		let mut message_relays = Vec::with_capacity(lanes.len() * 2);
-		for lane in lanes {
-			let left_to_right_messages = substrate_relay_helper::messages_lane::run::<
-				<Self::L2R as MessagesCliBridge>::MessagesLane,
-			>(self.left_to_right().messages_relay_params(
-				left_to_right_on_demand_headers.clone(),
-				right_to_left_on_demand_headers.clone(),
-				lane,
-				Self::L2R::maybe_messages_limits(),
-			))
-			.map_err(|e| anyhow::format_err!("{}", e))
-			.boxed();
-			message_relays.push(left_to_right_messages);
-
-			let right_to_left_messages = substrate_relay_helper::messages_lane::run::<
-				<Self::R2L as MessagesCliBridge>::MessagesLane,
-			>(self.right_to_left().messages_relay_params(
-				right_to_left_on_demand_headers.clone(),
-				left_to_right_on_demand_headers.clone(),
-				lane,
-				Self::R2L::maybe_messages_limits(),
-			))
-			.map_err(|e| anyhow::format_err!("{}", e))
-			.boxed();
-			message_relays.push(right_to_left_messages);
-		}
-
-		relay_utils::relay_metrics(self.base().common().metrics_params.clone())
-			.expose()
-			.await
-			.map_err(|e| anyhow::format_err!("{}", e))?;
-
-		futures::future::select_all(message_relays).await.0
-	}
-}
-
 /// BridgeHubRococo <> BridgeHubWestend complex relay.
 pub struct BridgeHubRococoBridgeHubWestendFull2WayBridge {
 	base: <Self as Full2WayBridge>::Base,
@@ -556,6 +263,7 @@ impl RelayHeadersAndMessages {
 #[cfg(test)]
 mod tests {
 	use super::*;
+	use substrate_relay_helper::cli::{HexLaneId, PrometheusParams};
 
 	#[test]
 	fn should_parse_parachain_to_parachain_options() {

bridges/relays/bin-substrate/src/cli/relay_messages.rs

@@ -14,10 +14,8 @@
 // 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/>.
 
-use async_trait::async_trait;
-use sp_core::Pair;
 use structopt::StructOpt;
-use strum::VariantNames;
+use strum::{EnumString, VariantNames};
 
 use crate::bridges::{
 	kusama_polkadot::{
@@ -37,10 +35,21 @@ use crate::bridges::{
 		bridge_hub_westend_messages_to_bridge_hub_rococo::BridgeHubWestendToBridgeHubRococoMessagesCliBridge,
 	},
 };
-use relay_substrate_client::{AccountIdOf, AccountKeyPairOf, BalanceOf, ChainWithTransactions};
+use substrate_relay_helper::cli::relay_messages::{MessagesRelayer, RelayMessagesParams};
-use substrate_relay_helper::{messages_lane::MessagesRelayParams, TransactionParams};
 
-use crate::cli::{bridge::*, chain_schema::*, CliChain, HexLaneId, PrometheusParams};
+#[derive(Debug, PartialEq, Eq, EnumString, VariantNames)]
+#[strum(serialize_all = "kebab_case")]
+/// Supported full bridges (headers + messages).
+pub enum FullBridge {
+	BridgeHubRococoToBridgeHubWestend,
+	BridgeHubWestendToBridgeHubRococo,
+	BridgeHubKusamaToBridgeHubPolkadot,
+	BridgeHubPolkadotToBridgeHubKusama,
+	PolkadotBulletinToBridgeHubPolkadot,
+	BridgeHubPolkadotToPolkadotBulletin,
+	RococoBulletinToBridgeHubRococo,
+	BridgeHubRococoToRococoBulletin,
+}
 
 /// Start messages relayer process.
 #[derive(StructOpt)]
@@ -48,57 +57,8 @@ pub struct RelayMessages {
 	/// A bridge instance to relay messages for.
 	#[structopt(possible_values = FullBridge::VARIANTS, case_insensitive = true)]
 	bridge: FullBridge,
-	/// Hex-encoded lane id that should be served by the relay. Defaults to `00000000`.
-	#[structopt(long, default_value = "00000000")]
-	lane: HexLaneId,
 	#[structopt(flatten)]
-	source: SourceConnectionParams,
+	params: RelayMessagesParams,
-	#[structopt(flatten)]
-	source_sign: SourceSigningParams,
-	#[structopt(flatten)]
-	target: TargetConnectionParams,
-	#[structopt(flatten)]
-	target_sign: TargetSigningParams,
-	#[structopt(flatten)]
-	prometheus_params: PrometheusParams,
-}
-
-#[async_trait]
-trait MessagesRelayer: MessagesCliBridge
-where
-	Self::Source: ChainWithTransactions + CliChain,
-	AccountIdOf<Self::Source>: From<<AccountKeyPairOf<Self::Source> as Pair>::Public>,
-	AccountIdOf<Self::Target>: From<<AccountKeyPairOf<Self::Target> as Pair>::Public>,
-	BalanceOf<Self::Source>: TryFrom<BalanceOf<Self::Target>>,
-{
-	async fn relay_messages(data: RelayMessages) -> anyhow::Result<()> {
-		let source_client = data.source.into_client::<Self::Source>().await?;
-		let source_sign = data.source_sign.to_keypair::<Self::Source>()?;
-		let source_transactions_mortality = data.source_sign.transactions_mortality()?;
-		let target_client = data.target.into_client::<Self::Target>().await?;
-		let target_sign = data.target_sign.to_keypair::<Self::Target>()?;
-		let target_transactions_mortality = data.target_sign.transactions_mortality()?;
-
-		substrate_relay_helper::messages_lane::run::<Self::MessagesLane>(MessagesRelayParams {
-			source_client,
-			source_transaction_params: TransactionParams {
-				signer: source_sign,
-				mortality: source_transactions_mortality,
-			},
-			target_client,
-			target_transaction_params: TransactionParams {
-				signer: target_sign,
-				mortality: target_transactions_mortality,
-			},
-			source_to_target_headers_relay: None,
-			target_to_source_headers_relay: None,
-			lane_id: data.lane.into(),
-			limits: Self::maybe_messages_limits(),
-			metrics_params: data.prometheus_params.into_metrics_params()?,
-		})
-		.await
-		.map_err(|e| anyhow::format_err!("{}", e))
-	}
 }
 
 impl MessagesRelayer for BridgeHubRococoToBridgeHubWestendMessagesCliBridge {}
@@ -115,21 +75,21 @@ impl RelayMessages {
 	pub async fn run(self) -> anyhow::Result<()> {
 		match self.bridge {
 			FullBridge::BridgeHubRococoToBridgeHubWestend =>
-				BridgeHubRococoToBridgeHubWestendMessagesCliBridge::relay_messages(self),
+				BridgeHubRococoToBridgeHubWestendMessagesCliBridge::relay_messages(self.params),
 			FullBridge::BridgeHubWestendToBridgeHubRococo =>
-				BridgeHubWestendToBridgeHubRococoMessagesCliBridge::relay_messages(self),
+				BridgeHubWestendToBridgeHubRococoMessagesCliBridge::relay_messages(self.params),
 			FullBridge::BridgeHubKusamaToBridgeHubPolkadot =>
-				BridgeHubKusamaToBridgeHubPolkadotMessagesCliBridge::relay_messages(self),
+				BridgeHubKusamaToBridgeHubPolkadotMessagesCliBridge::relay_messages(self.params),
 			FullBridge::BridgeHubPolkadotToBridgeHubKusama =>
-				BridgeHubPolkadotToBridgeHubKusamaMessagesCliBridge::relay_messages(self),
+				BridgeHubPolkadotToBridgeHubKusamaMessagesCliBridge::relay_messages(self.params),
 			FullBridge::PolkadotBulletinToBridgeHubPolkadot =>
-				PolkadotBulletinToBridgeHubPolkadotMessagesCliBridge::relay_messages(self),
+				PolkadotBulletinToBridgeHubPolkadotMessagesCliBridge::relay_messages(self.params),
 			FullBridge::BridgeHubPolkadotToPolkadotBulletin =>
-				BridgeHubPolkadotToPolkadotBulletinMessagesCliBridge::relay_messages(self),
+				BridgeHubPolkadotToPolkadotBulletinMessagesCliBridge::relay_messages(self.params),
 			FullBridge::RococoBulletinToBridgeHubRococo =>
-				RococoBulletinToBridgeHubRococoMessagesCliBridge::relay_messages(self),
+				RococoBulletinToBridgeHubRococoMessagesCliBridge::relay_messages(self.params),
 			FullBridge::BridgeHubRococoToRococoBulletin =>
-				BridgeHubRococoToRococoBulletinMessagesCliBridge::relay_messages(self),
+				BridgeHubRococoToRococoBulletinMessagesCliBridge::relay_messages(self.params),
 		}
 		.await
 	}

bridges/relays/bin-substrate/src/cli/relay_parachains.rs

@@ -26,24 +26,9 @@ use crate::bridges::{
 		westend_parachains_to_bridge_hub_rococo::BridgeHubWestendToBridgeHubRococoCliBridge,
 	},
 };
-use async_std::sync::Mutex;
-use async_trait::async_trait;
-use parachains_relay::parachains_loop::{AvailableHeader, SourceClient, TargetClient};
-use relay_substrate_client::Parachain;
-use relay_utils::metrics::{GlobalMetrics, StandaloneMetric};
-use std::sync::Arc;
 use structopt::StructOpt;
 use strum::{EnumString, VariantNames};
-use substrate_relay_helper::{
+use substrate_relay_helper::cli::relay_parachains::{ParachainsRelayer, RelayParachainsParams};
-	parachains::{source::ParachainsSource, target::ParachainsTarget, ParachainsPipelineAdapter},
-	TransactionParams,
-};
-
-use crate::cli::{
-	bridge::{CliBridgeBase, ParachainToRelayHeadersCliBridge},
-	chain_schema::*,
-	PrometheusParams,
-};
 
 /// Start parachain heads relayer process.
 #[derive(StructOpt)]
@@ -52,13 +37,7 @@ pub struct RelayParachains {
 	#[structopt(possible_values = RelayParachainsBridge::VARIANTS, case_insensitive = true)]
 	bridge: RelayParachainsBridge,
 	#[structopt(flatten)]
-	source: SourceConnectionParams,
+	params: RelayParachainsParams,
-	#[structopt(flatten)]
-	target: TargetConnectionParams,
-	#[structopt(flatten)]
-	target_sign: TargetSigningParams,
-	#[structopt(flatten)]
-	prometheus_params: PrometheusParams,
 }
 
 /// Parachain heads relay bridge.
@@ -73,47 +52,6 @@ pub enum RelayParachainsBridge {
 	WestendToBridgeHubRococo,
 }
 
-#[async_trait]
-trait ParachainsRelayer: ParachainToRelayHeadersCliBridge
-where
-	ParachainsSource<Self::ParachainFinality>:
-		SourceClient<ParachainsPipelineAdapter<Self::ParachainFinality>>,
-	ParachainsTarget<Self::ParachainFinality>:
-		TargetClient<ParachainsPipelineAdapter<Self::ParachainFinality>>,
-	<Self as CliBridgeBase>::Source: Parachain,
-{
-	async fn relay_parachains(data: RelayParachains) -> anyhow::Result<()> {
-		let source_client = data.source.into_client::<Self::SourceRelay>().await?;
-		let source_client = ParachainsSource::<Self::ParachainFinality>::new(
-			source_client,
-			Arc::new(Mutex::new(AvailableHeader::Missing)),
-		);
-
-		let target_transaction_params = TransactionParams {
-			signer: data.target_sign.to_keypair::<Self::Target>()?,
-			mortality: data.target_sign.target_transactions_mortality,
-		};
-		let target_client = data.target.into_client::<Self::Target>().await?;
-		let target_client = ParachainsTarget::<Self::ParachainFinality>::new(
-			target_client.clone(),
-			target_transaction_params,
-		);
-
-		let metrics_params: relay_utils::metrics::MetricsParams =
-			data.prometheus_params.into_metrics_params()?;
-		GlobalMetrics::new()?.register_and_spawn(&metrics_params.registry)?;
-
-		parachains_relay::parachains_loop::run(
-			source_client,
-			target_client,
-			metrics_params,
-			futures::future::pending(),
-		)
-		.await
-		.map_err(|e| anyhow::format_err!("{}", e))
-	}
-}
-
 impl ParachainsRelayer for BridgeHubRococoToBridgeHubWestendCliBridge {}
 impl ParachainsRelayer for BridgeHubWestendToBridgeHubRococoCliBridge {}
 impl ParachainsRelayer for BridgeHubKusamaToBridgeHubPolkadotCliBridge {}
@@ -126,17 +64,17 @@ impl RelayParachains {
 	pub async fn run(self) -> anyhow::Result<()> {
 		match self.bridge {
 			RelayParachainsBridge::RococoToBridgeHubWestend =>
-				BridgeHubRococoToBridgeHubWestendCliBridge::relay_parachains(self),
+				BridgeHubRococoToBridgeHubWestendCliBridge::relay_parachains(self.params),
 			RelayParachainsBridge::WestendToBridgeHubRococo =>
-				BridgeHubWestendToBridgeHubRococoCliBridge::relay_parachains(self),
+				BridgeHubWestendToBridgeHubRococoCliBridge::relay_parachains(self.params),
 			RelayParachainsBridge::KusamaToBridgeHubPolkadot =>
-				BridgeHubKusamaToBridgeHubPolkadotCliBridge::relay_parachains(self),
+				BridgeHubKusamaToBridgeHubPolkadotCliBridge::relay_parachains(self.params),
 			RelayParachainsBridge::PolkadotToBridgeHubKusama =>
-				BridgeHubPolkadotToBridgeHubKusamaCliBridge::relay_parachains(self),
+				BridgeHubPolkadotToBridgeHubKusamaCliBridge::relay_parachains(self.params),
 			RelayParachainsBridge::PolkadotToPolkadotBulletin =>
-				PolkadotToPolkadotBulletinCliBridge::relay_parachains(self),
+				PolkadotToPolkadotBulletinCliBridge::relay_parachains(self.params),
 			RelayParachainsBridge::RococoToRococoBulletin =>
-				RococoToRococoBulletinCliBridge::relay_parachains(self),
+				RococoToRococoBulletinCliBridge::relay_parachains(self.params),
 		}
 		.await
 	}

bridges/relays/bin-substrate/src/main.rs

@@ -19,7 +19,6 @@
 #![warn(missing_docs)]
 
 mod bridges;
-mod chains;
 mod cli;
 
 fn main() {

bridges/relays/client-bridge-hub-kusama/src/lib.rs

@@ -23,8 +23,9 @@ use bp_polkadot::SuffixedCommonTransactionExtensionExt;
 use codec::Encode;
 use relay_substrate_client::{
 	calls::UtilityCall as MockUtilityCall, Chain, ChainWithBalances, ChainWithMessages,
-	ChainWithTransactions, ChainWithUtilityPallet, Error as SubstrateError,
+	ChainWithRuntimeVersion, ChainWithTransactions, ChainWithUtilityPallet,
-	MockedRuntimeUtilityPallet, SignParam, UnderlyingChainProvider, UnsignedTransaction,
+	Error as SubstrateError, MockedRuntimeUtilityPallet, SignParam, SimpleRuntimeVersion,
+	UnderlyingChainProvider, UnsignedTransaction,
 };
 use sp_core::{storage::StorageKey, Pair};
 use sp_runtime::{generic::SignedPayload, traits::IdentifyAccount};
@@ -120,3 +121,8 @@ impl ChainWithMessages for BridgeHubKusama {
 	const FROM_CHAIN_MESSAGE_DETAILS_METHOD: &'static str =
 		bp_bridge_hub_kusama::FROM_BRIDGE_HUB_KUSAMA_MESSAGE_DETAILS_METHOD;
 }
+
+impl ChainWithRuntimeVersion for BridgeHubKusama {
+	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
+		Some(SimpleRuntimeVersion { spec_version: 1_001_000, transaction_version: 4 });
+}

bridges/relays/client-bridge-hub-polkadot/src/lib.rs

@@ -23,8 +23,9 @@ use bp_polkadot_core::SuffixedCommonTransactionExtensionExt;
 use codec::Encode;
 use relay_substrate_client::{
 	calls::UtilityCall as MockUtilityCall, Chain, ChainWithBalances, ChainWithMessages,
-	ChainWithTransactions, ChainWithUtilityPallet, Error as SubstrateError,
+	ChainWithRuntimeVersion, ChainWithTransactions, ChainWithUtilityPallet,
-	MockedRuntimeUtilityPallet, SignParam, UnderlyingChainProvider, UnsignedTransaction,
+	Error as SubstrateError, MockedRuntimeUtilityPallet, SignParam, SimpleRuntimeVersion,
+	UnderlyingChainProvider, UnsignedTransaction,
 };
 use sp_core::{storage::StorageKey, Pair};
 use sp_runtime::{generic::SignedPayload, traits::IdentifyAccount};
@@ -124,3 +125,8 @@ impl ChainWithMessages for BridgeHubPolkadot {
 	const FROM_CHAIN_MESSAGE_DETAILS_METHOD: &'static str =
 		bp_bridge_hub_polkadot::FROM_BRIDGE_HUB_POLKADOT_MESSAGE_DETAILS_METHOD;
 }
+
+impl ChainWithRuntimeVersion for BridgeHubPolkadot {
+	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
+		Some(SimpleRuntimeVersion { spec_version: 1_001_000, transaction_version: 3 });
+}

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

@@ -23,8 +23,9 @@ use bp_polkadot_core::SuffixedCommonTransactionExtensionExt;
 use codec::Encode;
 use relay_substrate_client::{
 	calls::UtilityCall as MockUtilityCall, Chain, ChainWithBalances, ChainWithMessages,
-	ChainWithTransactions, ChainWithUtilityPallet, Error as SubstrateError,
+	ChainWithRuntimeVersion, ChainWithTransactions, ChainWithUtilityPallet,
-	MockedRuntimeUtilityPallet, SignParam, UnderlyingChainProvider, UnsignedTransaction,
+	Error as SubstrateError, MockedRuntimeUtilityPallet, SignParam, SimpleRuntimeVersion,
+	UnderlyingChainProvider, UnsignedTransaction,
 };
 use sp_core::{storage::StorageKey, Pair};
 use sp_runtime::{generic::SignedPayload, traits::IdentifyAccount};
@@ -122,3 +123,8 @@ impl ChainWithMessages for BridgeHubRococo {
 	const FROM_CHAIN_MESSAGE_DETAILS_METHOD: &'static str =
 		bp_bridge_hub_rococo::FROM_BRIDGE_HUB_ROCOCO_MESSAGE_DETAILS_METHOD;
 }
+
+impl ChainWithRuntimeVersion for BridgeHubRococo {
+	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
+		Some(SimpleRuntimeVersion { spec_version: 1_008_000, transaction_version: 4 });
+}

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

@@ -23,8 +23,9 @@ use bp_polkadot_core::SuffixedCommonTransactionExtensionExt;
 use codec::Encode;
 use relay_substrate_client::{
 	calls::UtilityCall as MockUtilityCall, Chain, ChainWithBalances, ChainWithMessages,
-	ChainWithTransactions, ChainWithUtilityPallet, Error as SubstrateError,
+	ChainWithRuntimeVersion, ChainWithTransactions, ChainWithUtilityPallet,
-	MockedRuntimeUtilityPallet, SignParam, UnderlyingChainProvider, UnsignedTransaction,
+	Error as SubstrateError, MockedRuntimeUtilityPallet, SignParam, SimpleRuntimeVersion,
+	UnderlyingChainProvider, UnsignedTransaction,
 };
 use sp_core::{storage::StorageKey, Pair};
 use sp_runtime::{generic::SignedPayload, traits::IdentifyAccount};
@@ -120,3 +121,8 @@ impl ChainWithMessages for BridgeHubWestend {
 	const FROM_CHAIN_MESSAGE_DETAILS_METHOD: &'static str =
 		bp_bridge_hub_westend::FROM_BRIDGE_HUB_WESTEND_MESSAGE_DETAILS_METHOD;
 }
+
+impl ChainWithRuntimeVersion for BridgeHubWestend {
+	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
+		Some(SimpleRuntimeVersion { spec_version: 1_008_000, transaction_version: 4 });
+}

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

@@ -22,8 +22,9 @@ use bp_kusama::{AccountInfoStorageMapKeyProvider, KUSAMA_SYNCED_HEADERS_GRANDPA_
 use bp_polkadot_core::SuffixedCommonTransactionExtensionExt;
 use codec::Encode;
 use relay_substrate_client::{
-	Chain, ChainWithBalances, ChainWithGrandpa, ChainWithTransactions, Error as SubstrateError,
+	Chain, ChainWithBalances, ChainWithGrandpa, ChainWithRuntimeVersion, ChainWithTransactions,
-	RelayChain, SignParam, UnderlyingChainProvider, UnsignedTransaction,
+	Error as SubstrateError, RelayChain, SignParam, SimpleRuntimeVersion, UnderlyingChainProvider,
+	UnsignedTransaction,
 };
 use sp_core::{storage::StorageKey, Pair};
 use sp_runtime::{generic::SignedPayload, traits::IdentifyAccount, MultiAddress};
@@ -114,3 +115,8 @@ impl ChainWithTransactions for Kusama {
 		))
 	}
 }
+
+impl ChainWithRuntimeVersion for Kusama {
+	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
+		Some(SimpleRuntimeVersion { spec_version: 1_001_002, transaction_version: 25 });
+}

bridges/relays/client-polkadot-bulletin/src/lib.rs

@@ -21,8 +21,9 @@ mod codegen_runtime;
 use bp_polkadot_bulletin::POLKADOT_BULLETIN_SYNCED_HEADERS_GRANDPA_INFO_METHOD;
 use codec::Encode;
 use relay_substrate_client::{
-	Chain, ChainWithBalances, ChainWithGrandpa, ChainWithMessages, ChainWithTransactions,
+	Chain, ChainWithBalances, ChainWithGrandpa, ChainWithMessages, ChainWithRuntimeVersion,
-	Error as SubstrateError, SignParam, UnderlyingChainProvider, UnsignedTransaction,
+	ChainWithTransactions, Error as SubstrateError, SignParam, SimpleRuntimeVersion,
+	UnderlyingChainProvider, UnsignedTransaction,
 };
 use sp_core::{storage::StorageKey, Pair};
 use sp_runtime::{generic::SignedPayload, traits::IdentifyAccount, MultiAddress};
@@ -131,3 +132,8 @@ impl ChainWithTransactions for PolkadotBulletin {
 		))
 	}
 }
+
+impl ChainWithRuntimeVersion for PolkadotBulletin {
+	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
+		Some(SimpleRuntimeVersion { spec_version: 100, transaction_version: 1 });
+}

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

@@ -22,8 +22,9 @@ use bp_polkadot::{AccountInfoStorageMapKeyProvider, POLKADOT_SYNCED_HEADERS_GRAN
 use bp_polkadot_core::SuffixedCommonTransactionExtensionExt;
 use codec::Encode;
 use relay_substrate_client::{
-	Chain, ChainWithBalances, ChainWithGrandpa, ChainWithTransactions, Error as SubstrateError,
+	Chain, ChainWithBalances, ChainWithGrandpa, ChainWithRuntimeVersion, ChainWithTransactions,
-	RelayChain, SignParam, UnderlyingChainProvider, UnsignedTransaction,
+	Error as SubstrateError, RelayChain, SignParam, SimpleRuntimeVersion, UnderlyingChainProvider,
+	UnsignedTransaction,
 };
 use sp_core::{storage::StorageKey, Pair};
 use sp_runtime::{generic::SignedPayload, traits::IdentifyAccount, MultiAddress};
@@ -114,3 +115,8 @@ impl ChainWithTransactions for Polkadot {
 		))
 	}
 }
+
+impl ChainWithRuntimeVersion for Polkadot {
+	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
+		Some(SimpleRuntimeVersion { spec_version: 1_001_002, transaction_version: 25 });
+}

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

@@ -22,8 +22,9 @@ use bp_polkadot_core::SuffixedCommonTransactionExtensionExt;
 use bp_rococo::ROCOCO_SYNCED_HEADERS_GRANDPA_INFO_METHOD;
 use codec::Encode;
 use relay_substrate_client::{
-	Chain, ChainWithBalances, ChainWithGrandpa, ChainWithTransactions, Error as SubstrateError,
+	Chain, ChainWithBalances, ChainWithGrandpa, ChainWithRuntimeVersion, ChainWithTransactions,
-	RelayChain, SignParam, UnderlyingChainProvider, UnsignedTransaction,
+	Error as SubstrateError, RelayChain, SignParam, SimpleRuntimeVersion, UnderlyingChainProvider,
+	UnsignedTransaction,
 };
 use sp_core::{storage::StorageKey, Pair};
 use sp_runtime::{generic::SignedPayload, traits::IdentifyAccount, MultiAddress};
@@ -114,3 +115,8 @@ impl ChainWithTransactions for Rococo {
 		))
 	}
 }
+
+impl ChainWithRuntimeVersion for Rococo {
+	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
+		Some(SimpleRuntimeVersion { spec_version: 1_008_000, transaction_version: 24 });
+}

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

@@ -16,6 +16,7 @@
 
 use crate::calls::UtilityCall;
 
+use crate::SimpleRuntimeVersion;
 use bp_header_chain::ChainWithGrandpa as ChainWithGrandpaBase;
 use bp_messages::ChainWithMessages as ChainWithMessagesBase;
 use bp_runtime::{
@@ -58,6 +59,16 @@ pub trait Chain: ChainBase + Clone {
 	type Call: Clone + Codec + Debug + Send + Sync;
 }
 
+/// Bridge-supported network definition.
+///
+/// Used to abstract away CLI commands.
+pub trait ChainWithRuntimeVersion: Chain {
+	/// Current version of the chain runtime, known to relay.
+	///
+	/// can be `None` if relay is not going to submit transactions to that chain.
+	const RUNTIME_VERSION: Option<SimpleRuntimeVersion>;
+}
+
 /// Substrate-based relay chain that supports parachains.
 ///
 /// We assume that the parachains are supported using `runtime_parachains::paras` pallet.

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

@@ -35,9 +35,9 @@ use std::time::Duration;
 pub use crate::{
 	chain::{
 		AccountKeyPairOf, BlockWithJustification, CallOf, Chain, ChainWithBalances,
-		ChainWithGrandpa, ChainWithMessages, ChainWithTransactions, ChainWithUtilityPallet,
+		ChainWithGrandpa, ChainWithMessages, ChainWithRuntimeVersion, ChainWithTransactions,
-		FullRuntimeUtilityPallet, MockedRuntimeUtilityPallet, Parachain, RelayChain, SignParam,
+		ChainWithUtilityPallet, FullRuntimeUtilityPallet, MockedRuntimeUtilityPallet, Parachain,
-		TransactionStatusOf, UnsignedTransaction, UtilityPallet,
+		RelayChain, SignParam, TransactionStatusOf, UnsignedTransaction, UtilityPallet,
 	},
 	client::{
 		is_ancient_block, ChainRuntimeVersion, Client, OpaqueGrandpaAuthoritiesSet,

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

@@ -22,8 +22,9 @@ use bp_polkadot_core::SuffixedCommonTransactionExtensionExt;
 use bp_westend::WESTEND_SYNCED_HEADERS_GRANDPA_INFO_METHOD;
 use codec::Encode;
 use relay_substrate_client::{
-	Chain, ChainWithBalances, ChainWithGrandpa, ChainWithTransactions, Error as SubstrateError,
+	Chain, ChainWithBalances, ChainWithGrandpa, ChainWithRuntimeVersion, ChainWithTransactions,
-	RelayChain, SignParam, UnderlyingChainProvider, UnsignedTransaction,
+	Error as SubstrateError, RelayChain, SignParam, SimpleRuntimeVersion, UnderlyingChainProvider,
+	UnsignedTransaction,
 };
 use sp_core::{storage::StorageKey, Pair};
 use sp_runtime::{generic::SignedPayload, traits::IdentifyAccount, MultiAddress};
@@ -114,3 +115,8 @@ impl ChainWithTransactions for Westend {
 		))
 	}
 }
+
+impl ChainWithRuntimeVersion for Westend {
+	const RUNTIME_VERSION: Option<SimpleRuntimeVersion> =
+		Some(SimpleRuntimeVersion { spec_version: 1_008_000, transaction_version: 24 });
+}

bridges/relays/lib-substrate-relay/Cargo.toml

@@ -10,14 +10,17 @@ workspace = true
 
 [dependencies]
 anyhow = "1.0"
-thiserror = { workspace = true }
 async-std = "1.9.0"
 async-trait = "0.1"
 codec = { package = "parity-scale-codec", version = "3.1.5" }
 futures = "0.3.30"
 hex = "0.4"
-num-traits = "0.2"
 log = { workspace = true }
+num-traits = "0.2"
+rbtag = "0.3"
+structopt = "0.3"
+strum = { version = "0.26.2", features = ["derive"] }
+thiserror = { workspace = true }
 
 # Bridge dependencies
 

bridges/relays/lib-substrate-relay/src/cli/bridge.rs

@@ -14,38 +14,26 @@
 // 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/>.
 
-use crate::cli::CliChain;
+//! Basic traits for exposing bridges in the CLI.
-use pallet_bridge_parachains::{RelayBlockHash, RelayBlockHasher, RelayBlockNumber};
+
-use relay_substrate_client::{Chain, ChainWithTransactions, Parachain, RelayChain};
+use crate::{
-use strum::{EnumString, VariantNames};
-use substrate_relay_helper::{
 	equivocation::SubstrateEquivocationDetectionPipeline,
 	finality::SubstrateFinalitySyncPipeline,
 	messages_lane::{MessagesRelayLimits, SubstrateMessageLane},
 	parachains::SubstrateParachainsPipeline,
 };
-
+use pallet_bridge_parachains::{RelayBlockHash, RelayBlockHasher, RelayBlockNumber};
-#[derive(Debug, PartialEq, Eq, EnumString, VariantNames)]
+use relay_substrate_client::{
-#[strum(serialize_all = "kebab_case")]
+	Chain, ChainWithRuntimeVersion, ChainWithTransactions, Parachain, RelayChain,
-/// Supported full bridges (headers + messages).
+};
-pub enum FullBridge {
-	BridgeHubRococoToBridgeHubWestend,
-	BridgeHubWestendToBridgeHubRococo,
-	BridgeHubKusamaToBridgeHubPolkadot,
-	BridgeHubPolkadotToBridgeHubKusama,
-	PolkadotBulletinToBridgeHubPolkadot,
-	BridgeHubPolkadotToPolkadotBulletin,
-	RococoBulletinToBridgeHubRococo,
-	BridgeHubRococoToRococoBulletin,
-}
 
 /// Minimal bridge representation that can be used from the CLI.
 /// It connects a source chain to a target chain.
 pub trait CliBridgeBase: Sized {
 	/// The source chain.
-	type Source: Chain + CliChain;
+	type Source: Chain + ChainWithRuntimeVersion;
 	/// The target chain.
-	type Target: ChainWithTransactions + CliChain;
+	type Target: ChainWithTransactions + ChainWithRuntimeVersion;
 }
 
 /// Bridge representation that can be used from the CLI for relaying headers
@@ -60,6 +48,7 @@ pub trait RelayToRelayHeadersCliBridge: CliBridgeBase {
 
 /// Convenience trait that adds bounds to `CliBridgeBase`.
 pub trait RelayToRelayEquivocationDetectionCliBridgeBase: CliBridgeBase {
+	/// The source chain with extra bounds.
 	type BoundedSource: ChainWithTransactions;
 }
 
@@ -89,10 +78,10 @@ pub trait ParachainToRelayHeadersCliBridge: CliBridgeBase
 where
 	Self::Source: Parachain,
 {
-	// The `CliBridgeBase` type represents the parachain in this situation.
+	/// The `CliBridgeBase` type represents the parachain in this situation.
-	// We need to add an extra type for the relay chain.
+	/// We need to add an extra type for the relay chain.
 	type SourceRelay: Chain<BlockNumber = RelayBlockNumber, Hash = RelayBlockHash, Hasher = RelayBlockHasher>
-		+ CliChain
+		+ ChainWithRuntimeVersion
 		+ RelayChain;
 	/// Finality proofs synchronization pipeline (source parachain -> target).
 	type ParachainFinality: SubstrateParachainsPipeline<

bridges/relays/lib-substrate-relay/src/cli/chain_schema.rs

@@ -0,0 +1,250 @@
+// Copyright 2019-2022 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/>.
+
+//! Primitives related to chain CLI options.
+
+use relay_substrate_client::{AccountKeyPairOf, ChainWithTransactions};
+use structopt::StructOpt;
+use strum::{EnumString, VariantNames};
+
+use relay_substrate_client::{ChainRuntimeVersion, ChainWithRuntimeVersion, SimpleRuntimeVersion};
+
+use crate::TransactionParams;
+
+#[doc = "Runtime version params."]
+#[derive(StructOpt, Debug, PartialEq, Eq, Clone, Copy, EnumString, VariantNames)]
+pub enum RuntimeVersionType {
+	/// Auto query version from chain
+	Auto,
+	/// Custom `spec_version` and `transaction_version`
+	Custom,
+	/// Read version from bundle dependencies directly.
+	Bundle,
+}
+
+/// Create chain-specific set of runtime version parameters.
+#[macro_export]
+macro_rules! declare_chain_runtime_version_params_cli_schema {
+	($chain:ident, $chain_prefix:ident) => {
+		bp_runtime::paste::item! {
+			#[doc = $chain " runtime version params."]
+			#[derive(StructOpt, Debug, PartialEq, Eq, Clone, Copy)]
+			pub struct [<$chain RuntimeVersionParams>] {
+				#[doc = "The type of runtime version for chain " $chain]
+				#[structopt(long, default_value = "Bundle")]
+				pub [<$chain_prefix _version_mode>]: RuntimeVersionType,
+				#[doc = "The custom sepc_version for chain " $chain]
+				#[structopt(long)]
+				pub [<$chain_prefix _spec_version>]: Option<u32>,
+				#[doc = "The custom transaction_version for chain " $chain]
+				#[structopt(long)]
+				pub [<$chain_prefix _transaction_version>]: Option<u32>,
+			}
+
+			impl [<$chain RuntimeVersionParams>] {
+				/// Converts self into `ChainRuntimeVersion`.
+				pub fn into_runtime_version(
+					self,
+					bundle_runtime_version: Option<SimpleRuntimeVersion>,
+				) -> anyhow::Result<ChainRuntimeVersion> {
+					Ok(match self.[<$chain_prefix _version_mode>] {
+						RuntimeVersionType::Auto => ChainRuntimeVersion::Auto,
+						RuntimeVersionType::Custom => {
+							let custom_spec_version = self.[<$chain_prefix _spec_version>]
+								.ok_or_else(|| anyhow::Error::msg(format!("The {}-spec-version is required when choose custom mode", stringify!($chain_prefix))))?;
+							let custom_transaction_version = self.[<$chain_prefix _transaction_version>]
+								.ok_or_else(|| anyhow::Error::msg(format!("The {}-transaction-version is required when choose custom mode", stringify!($chain_prefix))))?;
+							ChainRuntimeVersion::Custom(
+								SimpleRuntimeVersion {
+									spec_version: custom_spec_version,
+									transaction_version: custom_transaction_version
+								}
+							)
+						},
+						RuntimeVersionType::Bundle => match bundle_runtime_version {
+							Some(runtime_version) => ChainRuntimeVersion::Custom(runtime_version),
+							None => {
+								return Err(anyhow::format_err!("Cannot use bundled runtime version of {}: it is not known to the relay", stringify!($chain_prefix)));
+							}
+						},
+					})
+				}
+			}
+		}
+	};
+}
+
+/// Create chain-specific set of runtime version parameters.
+#[macro_export]
+macro_rules! declare_chain_connection_params_cli_schema {
+	($chain:ident, $chain_prefix:ident) => {
+		bp_runtime::paste::item! {
+			#[doc = $chain " connection params."]
+			#[derive(StructOpt, Debug, PartialEq, Eq, Clone)]
+			pub struct [<$chain ConnectionParams>] {
+				#[doc = "Connect to " $chain " node at given host."]
+				#[structopt(long, default_value = "127.0.0.1")]
+				pub [<$chain_prefix _host>]: String,
+				#[doc = "Connect to " $chain " node websocket server at given port."]
+				#[structopt(long, default_value = "9944")]
+				pub [<$chain_prefix _port>]: u16,
+				#[doc = "Use secure websocket connection."]
+				#[structopt(long)]
+				pub [<$chain_prefix _secure>]: bool,
+				#[doc = "Custom runtime version"]
+				#[structopt(flatten)]
+				pub [<$chain_prefix _runtime_version>]: [<$chain RuntimeVersionParams>],
+			}
+
+			impl [<$chain ConnectionParams>] {
+				/// Convert connection params into Substrate client.
+				#[allow(dead_code)]
+				pub async fn into_client<Chain: ChainWithRuntimeVersion>(
+					self,
+				) -> anyhow::Result<relay_substrate_client::Client<Chain>> {
+					let chain_runtime_version = self
+						.[<$chain_prefix _runtime_version>]
+						.into_runtime_version(Chain::RUNTIME_VERSION)?;
+					Ok(relay_substrate_client::Client::new(relay_substrate_client::ConnectionParams {
+						host: self.[<$chain_prefix _host>],
+						port: self.[<$chain_prefix _port>],
+						secure: self.[<$chain_prefix _secure>],
+						chain_runtime_version,
+					})
+					.await
+					)
+				}
+			}
+		}
+	};
+}
+
+/// Create chain-specific set of signing parameters.
+#[macro_export]
+macro_rules! declare_chain_signing_params_cli_schema {
+	($chain:ident, $chain_prefix:ident) => {
+		bp_runtime::paste::item! {
+			#[doc = $chain " signing params."]
+			#[derive(StructOpt, Debug, PartialEq, Eq, Clone)]
+			pub struct [<$chain SigningParams>] {
+				#[doc = "The SURI of secret key to use when transactions are submitted to the " $chain " node."]
+				#[structopt(long)]
+				pub [<$chain_prefix _signer>]: Option<String>,
+				#[doc = "The password for the SURI of secret key to use when transactions are submitted to the " $chain " node."]
+				#[structopt(long)]
+				pub [<$chain_prefix _signer_password>]: Option<String>,
+
+				#[doc = "Path to the file, that contains SURI of secret key to use when transactions are submitted to the " $chain " node. Can be overridden with " $chain_prefix "_signer option."]
+				#[structopt(long)]
+				pub [<$chain_prefix _signer_file>]: Option<std::path::PathBuf>,
+				#[doc = "Path to the file, that password for the SURI of secret key to use when transactions are submitted to the " $chain " node. Can be overridden with " $chain_prefix "_signer_password option."]
+				#[structopt(long)]
+				pub [<$chain_prefix _signer_password_file>]: Option<std::path::PathBuf>,
+
+				#[doc = "Transactions mortality period, in blocks. MUST be a power of two in [4; 65536] range. MAY NOT be larger than `BlockHashCount` parameter of the chain system module."]
+				#[structopt(long)]
+				pub [<$chain_prefix _transactions_mortality>]: Option<u32>,
+			}
+
+			impl [<$chain SigningParams>] {
+				/// Return transactions mortality.
+				#[allow(dead_code)]
+				pub fn transactions_mortality(&self) -> anyhow::Result<Option<u32>> {
+					self.[<$chain_prefix _transactions_mortality>]
+						.map(|transactions_mortality| {
+							if !(4..=65536).contains(&transactions_mortality)
+								|| !transactions_mortality.is_power_of_two()
+							{
+								Err(anyhow::format_err!(
+									"Transactions mortality {} is not a power of two in a [4; 65536] range",
+									transactions_mortality,
+								))
+							} else {
+								Ok(transactions_mortality)
+							}
+						})
+						.transpose()
+				}
+
+				/// Parse signing params into chain-specific KeyPair.
+				#[allow(dead_code)]
+				pub fn to_keypair<Chain: ChainWithTransactions>(&self) -> anyhow::Result<AccountKeyPairOf<Chain>> {
+					let suri = match (self.[<$chain_prefix _signer>].as_ref(), self.[<$chain_prefix _signer_file>].as_ref()) {
+						(Some(suri), _) => suri.to_owned(),
+						(None, Some(suri_file)) => std::fs::read_to_string(suri_file)
+							.map_err(|err| anyhow::format_err!(
+								"Failed to read SURI from file {:?}: {}",
+								suri_file,
+								err,
+							))?,
+						(None, None) => return Err(anyhow::format_err!(
+							"One of options must be specified: '{}' or '{}'",
+							stringify!([<$chain_prefix _signer>]),
+							stringify!([<$chain_prefix _signer_file>]),
+						)),
+					};
+
+					let suri_password = match (
+						self.[<$chain_prefix _signer_password>].as_ref(),
+						self.[<$chain_prefix _signer_password_file>].as_ref(),
+					) {
+						(Some(suri_password), _) => Some(suri_password.to_owned()),
+						(None, Some(suri_password_file)) => std::fs::read_to_string(suri_password_file)
+							.map(Some)
+							.map_err(|err| anyhow::format_err!(
+								"Failed to read SURI password from file {:?}: {}",
+								suri_password_file,
+								err,
+							))?,
+						_ => None,
+					};
+
+					use sp_core::crypto::Pair;
+
+					AccountKeyPairOf::<Chain>::from_string(
+						&suri,
+						suri_password.as_deref()
+					).map_err(|e| anyhow::format_err!("{:?}", e))
+				}
+
+				/// Return transaction parameters.
+				#[allow(dead_code)]
+				pub fn transaction_params<Chain: ChainWithTransactions>(
+					&self,
+				) -> anyhow::Result<TransactionParams<AccountKeyPairOf<Chain>>> {
+					Ok(TransactionParams {
+						mortality: self.transactions_mortality()?,
+						signer: self.to_keypair::<Chain>()?,
+					})
+				}
+			}
+		}
+	};
+}
+
+/// Create chain-specific set of configuration objects: connection parameters,
+/// signing parameters and bridge initialization parameters.
+#[macro_export]
+macro_rules! declare_chain_cli_schema {
+	($chain:ident, $chain_prefix:ident) => {
+		$crate::declare_chain_runtime_version_params_cli_schema!($chain, $chain_prefix);
+		$crate::declare_chain_connection_params_cli_schema!($chain, $chain_prefix);
+		$crate::declare_chain_signing_params_cli_schema!($chain, $chain_prefix);
+	};
+}
+
+declare_chain_cli_schema!(Source, source);
+declare_chain_cli_schema!(Target, target);

bridges/relays/lib-substrate-relay/src/cli/detect_equivocations.rs

@@ -0,0 +1,65 @@
+// Copyright 2019-2023 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/>.
+
+//! Primitives for exposing the equivocation detection functionality in the CLI.
+
+use crate::{
+	cli::{bridge::*, chain_schema::*, PrometheusParams},
+	equivocation,
+	equivocation::SubstrateEquivocationDetectionPipeline,
+};
+
+use async_trait::async_trait;
+use relay_substrate_client::ChainWithTransactions;
+use structopt::StructOpt;
+
+/// Start equivocation detection loop.
+#[derive(StructOpt)]
+pub struct DetectEquivocationsParams {
+	#[structopt(flatten)]
+	source: SourceConnectionParams,
+	#[structopt(flatten)]
+	source_sign: SourceSigningParams,
+	#[structopt(flatten)]
+	target: TargetConnectionParams,
+	#[structopt(flatten)]
+	prometheus_params: PrometheusParams,
+}
+
+/// Trait used for starting the equivocation detection loop between 2 chains.
+#[async_trait]
+pub trait EquivocationsDetector: RelayToRelayEquivocationDetectionCliBridge
+where
+	Self::Source: ChainWithTransactions,
+{
+	/// Start the equivocation detection loop.
+	async fn start(data: DetectEquivocationsParams) -> anyhow::Result<()> {
+		let source_client = data.source.into_client::<Self::Source>().await?;
+		Self::Equivocation::start_relay_guards(
+			&source_client,
+			source_client.can_start_version_guard(),
+		)
+		.await?;
+
+		equivocation::run::<Self::Equivocation>(
+			source_client,
+			data.target.into_client::<Self::Target>().await?,
+			data.source_sign.transaction_params::<Self::Source>()?,
+			data.prometheus_params.into_metrics_params()?,
+		)
+		.await
+	}
+}

bridges/relays/lib-substrate-relay/src/cli/init_bridge.rs

@@ -0,0 +1,85 @@
+// 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/>.
+
+//! Primitives for exposing the bridge initialization functionality in the CLI.
+
+use async_trait::async_trait;
+use codec::Encode;
+
+use crate::{
+	cli::{bridge::CliBridgeBase, chain_schema::*},
+	finality_base::engine::Engine,
+};
+use bp_runtime::Chain as ChainBase;
+use relay_substrate_client::{AccountKeyPairOf, Chain, UnsignedTransaction};
+use sp_core::Pair;
+use structopt::StructOpt;
+
+/// Bridge initialization params.
+#[derive(StructOpt)]
+pub struct InitBridgeParams {
+	#[structopt(flatten)]
+	source: SourceConnectionParams,
+	#[structopt(flatten)]
+	target: TargetConnectionParams,
+	#[structopt(flatten)]
+	target_sign: TargetSigningParams,
+	/// Generates all required data, but does not submit extrinsic
+	#[structopt(long)]
+	dry_run: bool,
+}
+
+/// Trait used for bridge initializing.
+#[async_trait]
+pub trait BridgeInitializer: CliBridgeBase
+where
+	<Self::Target as ChainBase>::AccountId: From<<AccountKeyPairOf<Self::Target> as Pair>::Public>,
+{
+	/// The finality engine used by the source chain.
+	type Engine: Engine<Self::Source>;
+
+	/// Get the encoded call to init the bridge.
+	fn encode_init_bridge(
+		init_data: <Self::Engine as Engine<Self::Source>>::InitializationData,
+	) -> <Self::Target as Chain>::Call;
+
+	/// Initialize the bridge.
+	async fn init_bridge(data: InitBridgeParams) -> anyhow::Result<()> {
+		let source_client = data.source.into_client::<Self::Source>().await?;
+		let target_client = data.target.into_client::<Self::Target>().await?;
+		let target_sign = data.target_sign.to_keypair::<Self::Target>()?;
+		let dry_run = data.dry_run;
+
+		crate::finality::initialize::initialize::<Self::Engine, _, _, _>(
+			source_client,
+			target_client.clone(),
+			target_sign,
+			move |transaction_nonce, initialization_data| {
+				let call = Self::encode_init_bridge(initialization_data);
+				log::info!(
+					target: "bridge",
+					"Initialize bridge call encoded as hex string: {:?}",
+					format!("0x{}", hex::encode(call.encode()))
+				);
+				Ok(UnsignedTransaction::new(call.into(), transaction_nonce))
+			},
+			dry_run,
+		)
+		.await;
+
+		Ok(())
+	}
+}

bridges/relays/lib-substrate-relay/src/cli/mod.rs

@@ -0,0 +1,192 @@
+// 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/>.
+
+//! Deal with CLI args of substrate-to-substrate relay.
+
+use codec::{Decode, Encode};
+use rbtag::BuildInfo;
+use structopt::StructOpt;
+use strum::{EnumString, VariantNames};
+
+use bp_messages::LaneId;
+
+pub mod bridge;
+pub mod chain_schema;
+pub mod detect_equivocations;
+pub mod init_bridge;
+pub mod relay_headers;
+pub mod relay_headers_and_messages;
+pub mod relay_messages;
+pub mod relay_parachains;
+
+/// The target that will be used when publishing logs related to this pallet.
+pub const LOG_TARGET: &str = "bridge";
+
+/// Lane id.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct HexLaneId(pub [u8; 4]);
+
+impl From<HexLaneId> for LaneId {
+	fn from(lane_id: HexLaneId) -> LaneId {
+		LaneId(lane_id.0)
+	}
+}
+
+impl std::str::FromStr for HexLaneId {
+	type Err = hex::FromHexError;
+
+	fn from_str(s: &str) -> Result<Self, Self::Err> {
+		let mut lane_id = [0u8; 4];
+		hex::decode_to_slice(s, &mut lane_id)?;
+		Ok(HexLaneId(lane_id))
+	}
+}
+
+/// Nicer formatting for raw bytes vectors.
+#[derive(Default, Encode, Decode, PartialEq, Eq)]
+pub struct HexBytes(pub Vec<u8>);
+
+impl std::str::FromStr for HexBytes {
+	type Err = hex::FromHexError;
+
+	fn from_str(s: &str) -> Result<Self, Self::Err> {
+		Ok(Self(hex::decode(s)?))
+	}
+}
+
+impl std::fmt::Debug for HexBytes {
+	fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
+		write!(fmt, "0x{self}")
+	}
+}
+
+impl std::fmt::Display for HexBytes {
+	fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
+		write!(fmt, "{}", hex::encode(&self.0))
+	}
+}
+
+/// Prometheus metrics params.
+#[derive(Clone, Debug, PartialEq, StructOpt)]
+pub struct PrometheusParams {
+	/// Do not expose a Prometheus metric endpoint.
+	#[structopt(long)]
+	pub no_prometheus: bool,
+	/// Expose Prometheus endpoint at given interface.
+	#[structopt(long, default_value = "127.0.0.1")]
+	pub prometheus_host: String,
+	/// Expose Prometheus endpoint at given port.
+	#[structopt(long, default_value = "9616")]
+	pub prometheus_port: u16,
+}
+
+/// Struct to get git commit info and build time.
+#[derive(BuildInfo)]
+struct SubstrateRelayBuildInfo;
+
+impl SubstrateRelayBuildInfo {
+	/// Get git commit in form `<short-sha-(clean|dirty)>`.
+	pub fn get_git_commit() -> String {
+		// on gitlab we use images without git installed, so we can't use `rbtag` there
+		// locally we don't have `CI_*` env variables, so we can't rely on them
+		// => we are using `CI_*` env variables or else `rbtag`
+		let maybe_sha_from_ci = option_env!("CI_COMMIT_SHORT_SHA");
+		maybe_sha_from_ci
+			.map(|short_sha| {
+				// we assume that on CI the copy is always clean
+				format!("{short_sha}-clean")
+			})
+			.unwrap_or_else(|| SubstrateRelayBuildInfo.get_build_commit().into())
+	}
+}
+
+impl PrometheusParams {
+	/// Tries to convert CLI metrics params into metrics params, used by the relay.
+	pub fn into_metrics_params(self) -> anyhow::Result<relay_utils::metrics::MetricsParams> {
+		let metrics_address = if !self.no_prometheus {
+			Some(relay_utils::metrics::MetricsAddress {
+				host: self.prometheus_host,
+				port: self.prometheus_port,
+			})
+		} else {
+			None
+		};
+
+		let relay_version = option_env!("CARGO_PKG_VERSION").unwrap_or("unknown");
+		let relay_commit = SubstrateRelayBuildInfo::get_git_commit();
+		relay_utils::metrics::MetricsParams::new(
+			metrics_address,
+			relay_version.into(),
+			relay_commit,
+		)
+		.map_err(|e| anyhow::format_err!("{:?}", e))
+	}
+}
+
+/// Either explicit or maximal allowed value.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum ExplicitOrMaximal<V> {
+	/// User has explicitly specified argument value.
+	Explicit(V),
+	/// Maximal allowed value for this argument.
+	Maximal,
+}
+
+impl<V: std::str::FromStr> std::str::FromStr for ExplicitOrMaximal<V>
+where
+	V::Err: std::fmt::Debug,
+{
+	type Err = String;
+
+	fn from_str(s: &str) -> Result<Self, Self::Err> {
+		if s.to_lowercase() == "max" {
+			return Ok(ExplicitOrMaximal::Maximal)
+		}
+
+		V::from_str(s)
+			.map(ExplicitOrMaximal::Explicit)
+			.map_err(|e| format!("Failed to parse '{e:?}'. Expected 'max' or explicit value"))
+	}
+}
+
+#[doc = "Runtime version params."]
+#[derive(StructOpt, Debug, PartialEq, Eq, Clone, Copy, EnumString, VariantNames)]
+pub enum RuntimeVersionType {
+	/// Auto query version from chain
+	Auto,
+	/// Custom `spec_version` and `transaction_version`
+	Custom,
+	/// Read version from bundle dependencies directly.
+	Bundle,
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+
+	#[test]
+	fn hex_bytes_display_matches_from_str_for_clap() {
+		// given
+		let hex = HexBytes(vec![1, 2, 3, 4]);
+		let display = format!("{hex}");
+
+		// when
+		let hex2: HexBytes = display.parse().unwrap();
+
+		// then
+		assert_eq!(hex.0, hex2.0);
+	}
+}

bridges/relays/lib-substrate-relay/src/cli/relay_headers.rs

@@ -0,0 +1,76 @@
+// 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/>.
+
+//! Primitives for exposing the headers relaying functionality in the CLI.
+
+use async_trait::async_trait;
+use structopt::StructOpt;
+
+use relay_utils::metrics::{GlobalMetrics, StandaloneMetric};
+
+use crate::{
+	cli::{bridge::*, chain_schema::*, PrometheusParams},
+	finality::SubstrateFinalitySyncPipeline,
+};
+
+/// Chain headers relaying params.
+#[derive(StructOpt)]
+pub struct RelayHeadersParams {
+	/// If passed, only mandatory headers (headers that are changing the GRANDPA authorities set)
+	/// are relayed.
+	#[structopt(long)]
+	only_mandatory_headers: bool,
+	#[structopt(flatten)]
+	source: SourceConnectionParams,
+	#[structopt(flatten)]
+	target: TargetConnectionParams,
+	#[structopt(flatten)]
+	target_sign: TargetSigningParams,
+	#[structopt(flatten)]
+	prometheus_params: PrometheusParams,
+}
+
+/// Trait used for relaying headers between 2 chains.
+#[async_trait]
+pub trait HeadersRelayer: RelayToRelayHeadersCliBridge {
+	/// Relay headers.
+	async fn relay_headers(data: RelayHeadersParams) -> anyhow::Result<()> {
+		let source_client = data.source.into_client::<Self::Source>().await?;
+		let target_client = data.target.into_client::<Self::Target>().await?;
+		let target_transactions_mortality = data.target_sign.target_transactions_mortality;
+		let target_sign = data.target_sign.to_keypair::<Self::Target>()?;
+
+		let metrics_params: relay_utils::metrics::MetricsParams =
+			data.prometheus_params.into_metrics_params()?;
+		GlobalMetrics::new()?.register_and_spawn(&metrics_params.registry)?;
+
+		let target_transactions_params = crate::TransactionParams {
+			signer: target_sign,
+			mortality: target_transactions_mortality,
+		};
+		Self::Finality::start_relay_guards(&target_client, target_client.can_start_version_guard())
+			.await?;
+
+		crate::finality::run::<Self::Finality>(
+			source_client,
+			target_client,
+			data.only_mandatory_headers,
+			target_transactions_params,
+			metrics_params,
+		)
+		.await
+	}
+}

bridges/relays/lib-substrate-relay/src/cli/relay_headers_and_messages/mod.rs

@@ -0,0 +1,484 @@
+// Copyright 2019-2022 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/>.
+
+//! Complex 2-ways headers+messages relays support.
+//!
+//! To add new complex relay between `ChainA` and `ChainB`, you must:
+//!
+//! 1) ensure that there's a `declare_chain_cli_schema!(...)` for both chains.
+//! 2) add `declare_chain_to_chain_bridge_schema!(...)` or
+//!    `declare_chain_to_parachain_bridge_schema` for the bridge.
+//! 3) declare a new struct for the added bridge and implement the `Full2WayBridge` trait for it.
+
+#[macro_use]
+pub mod parachain_to_parachain;
+#[macro_use]
+pub mod relay_to_relay;
+#[macro_use]
+pub mod relay_to_parachain;
+
+use async_trait::async_trait;
+use std::{marker::PhantomData, sync::Arc};
+use structopt::StructOpt;
+
+use futures::{FutureExt, TryFutureExt};
+
+use crate::{
+	cli::{bridge::MessagesCliBridge, HexLaneId, PrometheusParams},
+	messages_lane::{MessagesRelayLimits, MessagesRelayParams},
+	on_demand::OnDemandRelay,
+	TaggedAccount, TransactionParams,
+};
+use bp_messages::LaneId;
+use bp_runtime::BalanceOf;
+use relay_substrate_client::{
+	AccountIdOf, AccountKeyPairOf, Chain, ChainWithBalances, ChainWithMessages,
+	ChainWithRuntimeVersion, ChainWithTransactions, Client,
+};
+use relay_utils::metrics::MetricsParams;
+use sp_core::Pair;
+
+/// Parameters that have the same names across all bridges.
+#[derive(Debug, PartialEq, StructOpt)]
+pub struct HeadersAndMessagesSharedParams {
+	/// Hex-encoded lane identifiers that should be served by the complex relay.
+	#[structopt(long, default_value = "00000000")]
+	pub lane: Vec<HexLaneId>,
+	/// If passed, only mandatory headers (headers that are changing the GRANDPA authorities set)
+	/// are relayed.
+	#[structopt(long)]
+	pub only_mandatory_headers: bool,
+	#[structopt(flatten)]
+	/// Prometheus metrics params.
+	pub prometheus_params: PrometheusParams,
+}
+
+/// Bridge parameters, shared by all bridge types.
+pub struct Full2WayBridgeCommonParams<
+	Left: ChainWithTransactions + ChainWithRuntimeVersion,
+	Right: ChainWithTransactions + ChainWithRuntimeVersion,
+> {
+	/// Shared parameters.
+	pub shared: HeadersAndMessagesSharedParams,
+	/// Parameters of the left chain.
+	pub left: BridgeEndCommonParams<Left>,
+	/// Parameters of the right chain.
+	pub right: BridgeEndCommonParams<Right>,
+
+	/// Common metric parameters.
+	pub metrics_params: MetricsParams,
+}
+
+impl<
+		Left: ChainWithTransactions + ChainWithRuntimeVersion,
+		Right: ChainWithTransactions + ChainWithRuntimeVersion,
+	> Full2WayBridgeCommonParams<Left, Right>
+{
+	/// Creates new bridge parameters from its components.
+	pub fn new<L2R: MessagesCliBridge<Source = Left, Target = Right>>(
+		shared: HeadersAndMessagesSharedParams,
+		left: BridgeEndCommonParams<Left>,
+		right: BridgeEndCommonParams<Right>,
+	) -> anyhow::Result<Self> {
+		// Create metrics registry.
+		let metrics_params = shared.prometheus_params.clone().into_metrics_params()?;
+		let metrics_params = relay_utils::relay_metrics(metrics_params).into_params();
+
+		Ok(Self { shared, left, right, metrics_params })
+	}
+}
+
+/// Parameters that are associated with one side of the bridge.
+pub struct BridgeEndCommonParams<Chain: ChainWithTransactions + ChainWithRuntimeVersion> {
+	/// Chain client.
+	pub client: Client<Chain>,
+	/// Params used for sending transactions to the chain.
+	pub tx_params: TransactionParams<AccountKeyPairOf<Chain>>,
+	/// Accounts, which balances are exposed as metrics by the relay process.
+	pub accounts: Vec<TaggedAccount<AccountIdOf<Chain>>>,
+}
+
+/// All data of the bidirectional complex relay.
+pub struct FullBridge<
+	'a,
+	Source: ChainWithTransactions + ChainWithRuntimeVersion,
+	Target: ChainWithTransactions + ChainWithRuntimeVersion,
+	Bridge: MessagesCliBridge<Source = Source, Target = Target>,
+> {
+	source: &'a mut BridgeEndCommonParams<Source>,
+	target: &'a mut BridgeEndCommonParams<Target>,
+	metrics_params: &'a MetricsParams,
+	_phantom_data: PhantomData<Bridge>,
+}
+
+impl<
+		'a,
+		Source: ChainWithTransactions + ChainWithRuntimeVersion,
+		Target: ChainWithTransactions + ChainWithRuntimeVersion,
+		Bridge: MessagesCliBridge<Source = Source, Target = Target>,
+	> FullBridge<'a, Source, Target, Bridge>
+where
+	AccountIdOf<Source>: From<<AccountKeyPairOf<Source> as Pair>::Public>,
+	AccountIdOf<Target>: From<<AccountKeyPairOf<Target> as Pair>::Public>,
+	BalanceOf<Source>: TryFrom<BalanceOf<Target>> + Into<u128>,
+{
+	/// Construct complex relay given it components.
+	fn new(
+		source: &'a mut BridgeEndCommonParams<Source>,
+		target: &'a mut BridgeEndCommonParams<Target>,
+		metrics_params: &'a MetricsParams,
+	) -> Self {
+		Self { source, target, metrics_params, _phantom_data: Default::default() }
+	}
+
+	/// Returns message relay parameters.
+	fn messages_relay_params(
+		&self,
+		source_to_target_headers_relay: Arc<dyn OnDemandRelay<Source, Target>>,
+		target_to_source_headers_relay: Arc<dyn OnDemandRelay<Target, Source>>,
+		lane_id: LaneId,
+		maybe_limits: Option<MessagesRelayLimits>,
+	) -> MessagesRelayParams<Bridge::MessagesLane> {
+		MessagesRelayParams {
+			source_client: self.source.client.clone(),
+			source_transaction_params: self.source.tx_params.clone(),
+			target_client: self.target.client.clone(),
+			target_transaction_params: self.target.tx_params.clone(),
+			source_to_target_headers_relay: Some(source_to_target_headers_relay),
+			target_to_source_headers_relay: Some(target_to_source_headers_relay),
+			lane_id,
+			limits: maybe_limits,
+			metrics_params: self.metrics_params.clone().disable(),
+		}
+	}
+}
+
+/// Base portion of the bidirectional complex relay.
+///
+/// This main purpose of extracting this trait is that in different relays the implementation
+/// of `start_on_demand_headers_relayers` method will be different. But the number of
+/// implementations is limited to relay <> relay, parachain <> relay and parachain <> parachain.
+/// This trait allows us to reuse these implementations in different bridges.
+#[async_trait]
+pub trait Full2WayBridgeBase: Sized + Send + Sync {
+	/// The CLI params for the bridge.
+	type Params;
+	/// The left relay chain.
+	type Left: ChainWithTransactions + ChainWithRuntimeVersion;
+	/// The right destination chain (it can be a relay or a parachain).
+	type Right: ChainWithTransactions + ChainWithRuntimeVersion;
+
+	/// Reference to common relay parameters.
+	fn common(&self) -> &Full2WayBridgeCommonParams<Self::Left, Self::Right>;
+
+	/// Mutable reference to common relay parameters.
+	fn mut_common(&mut self) -> &mut Full2WayBridgeCommonParams<Self::Left, Self::Right>;
+
+	/// Start on-demand headers relays.
+	async fn start_on_demand_headers_relayers(
+		&mut self,
+	) -> anyhow::Result<(
+		Arc<dyn OnDemandRelay<Self::Left, Self::Right>>,
+		Arc<dyn OnDemandRelay<Self::Right, Self::Left>>,
+	)>;
+}
+
+/// Bidirectional complex relay.
+#[async_trait]
+pub trait Full2WayBridge: Sized + Sync
+where
+	AccountIdOf<Self::Left>: From<<AccountKeyPairOf<Self::Left> as Pair>::Public>,
+	AccountIdOf<Self::Right>: From<<AccountKeyPairOf<Self::Right> as Pair>::Public>,
+	BalanceOf<Self::Left>: TryFrom<BalanceOf<Self::Right>> + Into<u128>,
+	BalanceOf<Self::Right>: TryFrom<BalanceOf<Self::Left>> + Into<u128>,
+{
+	/// Base portion of the bidirectional complex relay.
+	type Base: Full2WayBridgeBase<Left = Self::Left, Right = Self::Right>;
+
+	/// The left relay chain.
+	type Left: ChainWithTransactions
+		+ ChainWithBalances
+		+ ChainWithMessages
+		+ ChainWithRuntimeVersion;
+	/// The right relay chain.
+	type Right: ChainWithTransactions
+		+ ChainWithBalances
+		+ ChainWithMessages
+		+ ChainWithRuntimeVersion;
+
+	/// Left to Right bridge.
+	type L2R: MessagesCliBridge<Source = Self::Left, Target = Self::Right>;
+	/// Right to Left bridge
+	type R2L: MessagesCliBridge<Source = Self::Right, Target = Self::Left>;
+
+	/// Construct new bridge.
+	fn new(params: <Self::Base as Full2WayBridgeBase>::Params) -> anyhow::Result<Self>;
+
+	/// Reference to the base relay portion.
+	fn base(&self) -> &Self::Base;
+
+	/// Mutable reference to the base relay portion.
+	fn mut_base(&mut self) -> &mut Self::Base;
+
+	/// Creates and returns Left to Right complex relay.
+	fn left_to_right(&mut self) -> FullBridge<Self::Left, Self::Right, Self::L2R> {
+		let common = self.mut_base().mut_common();
+		FullBridge::<_, _, Self::L2R>::new(
+			&mut common.left,
+			&mut common.right,
+			&common.metrics_params,
+		)
+	}
+
+	/// Creates and returns Right to Left complex relay.
+	fn right_to_left(&mut self) -> FullBridge<Self::Right, Self::Left, Self::R2L> {
+		let common = self.mut_base().mut_common();
+		FullBridge::<_, _, Self::R2L>::new(
+			&mut common.right,
+			&mut common.left,
+			&common.metrics_params,
+		)
+	}
+
+	/// Start complex relay.
+	async fn run(&mut self) -> anyhow::Result<()> {
+		// Register standalone metrics.
+		{
+			let common = self.mut_base().mut_common();
+			common.left.accounts.push(TaggedAccount::Messages {
+				id: common.left.tx_params.signer.public().into(),
+				bridged_chain: Self::Right::NAME.to_string(),
+			});
+			common.right.accounts.push(TaggedAccount::Messages {
+				id: common.right.tx_params.signer.public().into(),
+				bridged_chain: Self::Left::NAME.to_string(),
+			});
+		}
+
+		// start on-demand header relays
+		let (left_to_right_on_demand_headers, right_to_left_on_demand_headers) =
+			self.mut_base().start_on_demand_headers_relayers().await?;
+
+		// add balance-related metrics
+		let lanes = self
+			.base()
+			.common()
+			.shared
+			.lane
+			.iter()
+			.cloned()
+			.map(Into::into)
+			.collect::<Vec<_>>();
+		{
+			let common = self.mut_base().mut_common();
+			crate::messages_metrics::add_relay_balances_metrics::<_, Self::Right>(
+				common.left.client.clone(),
+				&common.metrics_params,
+				&common.left.accounts,
+				&lanes,
+			)
+			.await?;
+			crate::messages_metrics::add_relay_balances_metrics::<_, Self::Left>(
+				common.right.client.clone(),
+				&common.metrics_params,
+				&common.right.accounts,
+				&lanes,
+			)
+			.await?;
+		}
+
+		// Need 2x capacity since we consider both directions for each lane
+		let mut message_relays = Vec::with_capacity(lanes.len() * 2);
+		for lane in lanes {
+			let left_to_right_messages = crate::messages_lane::run::<
+				<Self::L2R as MessagesCliBridge>::MessagesLane,
+			>(self.left_to_right().messages_relay_params(
+				left_to_right_on_demand_headers.clone(),
+				right_to_left_on_demand_headers.clone(),
+				lane,
+				Self::L2R::maybe_messages_limits(),
+			))
+			.map_err(|e| anyhow::format_err!("{}", e))
+			.boxed();
+			message_relays.push(left_to_right_messages);
+
+			let right_to_left_messages = crate::messages_lane::run::<
+				<Self::R2L as MessagesCliBridge>::MessagesLane,
+			>(self.right_to_left().messages_relay_params(
+				right_to_left_on_demand_headers.clone(),
+				left_to_right_on_demand_headers.clone(),
+				lane,
+				Self::R2L::maybe_messages_limits(),
+			))
+			.map_err(|e| anyhow::format_err!("{}", e))
+			.boxed();
+			message_relays.push(right_to_left_messages);
+		}
+
+		relay_utils::relay_metrics(self.base().common().metrics_params.clone())
+			.expose()
+			.await
+			.map_err(|e| anyhow::format_err!("{}", e))?;
+
+		futures::future::select_all(message_relays).await.0
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+	use crate::{cli::chain_schema::RuntimeVersionType, declare_chain_cli_schema};
+
+	use relay_substrate_client::{ChainRuntimeVersion, Parachain, SimpleRuntimeVersion};
+
+	#[test]
+	// We need `#[allow(dead_code)]` because some of the methods generated by the macros
+	// are not used.
+	#[allow(dead_code)]
+	fn should_parse_parachain_to_parachain_options() {
+		// Chains.
+		declare_chain_cli_schema!(Kusama, kusama);
+		declare_chain_cli_schema!(BridgeHubKusama, bridge_hub_kusama);
+		declare_chain_cli_schema!(Polkadot, polkadot);
+		declare_chain_cli_schema!(BridgeHubPolkadot, bridge_hub_polkadot);
+		// Means to override signers of different layer transactions.
+		declare_chain_cli_schema!(
+			KusamaHeadersToBridgeHubPolkadot,
+			kusama_headers_to_bridge_hub_polkadot
+		);
+		declare_chain_cli_schema!(
+			KusamaParachainsToBridgeHubPolkadot,
+			kusama_parachains_to_bridge_hub_polkadot
+		);
+		declare_chain_cli_schema!(
+			PolkadotHeadersToBridgeHubKusama,
+			polkadot_headers_to_bridge_hub_kusama
+		);
+		declare_chain_cli_schema!(
+			PolkadotParachainsToBridgeHubKusama,
+			polkadot_parachains_to_bridge_hub_kusama
+		);
+		// Bridges.
+		declare_parachain_to_parachain_bridge_schema!(
+			BridgeHubKusama,
+			Kusama,
+			BridgeHubPolkadot,
+			Polkadot
+		);
+
+		let res = BridgeHubKusamaBridgeHubPolkadotHeadersAndMessages::from_iter(vec![
+			"bridge-hub-kusama-bridge-hub-polkadot-headers-and-messages",
+			"--bridge-hub-kusama-host",
+			"bridge-hub-kusama-node-collator1",
+			"--bridge-hub-kusama-port",
+			"9944",
+			"--bridge-hub-kusama-signer",
+			"//Iden",
+			"--bridge-hub-kusama-transactions-mortality",
+			"64",
+			"--kusama-host",
+			"kusama-alice",
+			"--kusama-port",
+			"9944",
+			"--bridge-hub-polkadot-host",
+			"bridge-hub-polkadot-collator1",
+			"--bridge-hub-polkadot-port",
+			"9944",
+			"--bridge-hub-polkadot-signer",
+			"//George",
+			"--bridge-hub-polkadot-transactions-mortality",
+			"64",
+			"--polkadot-host",
+			"polkadot-alice",
+			"--polkadot-port",
+			"9944",
+			"--lane",
+			"00000000",
+			"--prometheus-host",
+			"0.0.0.0",
+		]);
+
+		// then
+		assert_eq!(
+			res,
+			BridgeHubKusamaBridgeHubPolkadotHeadersAndMessages {
+				shared: HeadersAndMessagesSharedParams {
+					lane: vec![HexLaneId([0x00, 0x00, 0x00, 0x00])],
+					only_mandatory_headers: false,
+					prometheus_params: PrometheusParams {
+						no_prometheus: false,
+						prometheus_host: "0.0.0.0".into(),
+						prometheus_port: 9616,
+					},
+				},
+				left: BridgeHubKusamaConnectionParams {
+					bridge_hub_kusama_host: "bridge-hub-kusama-node-collator1".into(),
+					bridge_hub_kusama_port: 9944,
+					bridge_hub_kusama_secure: false,
+					bridge_hub_kusama_runtime_version: BridgeHubKusamaRuntimeVersionParams {
+						bridge_hub_kusama_version_mode: RuntimeVersionType::Bundle,
+						bridge_hub_kusama_spec_version: None,
+						bridge_hub_kusama_transaction_version: None,
+					},
+				},
+				left_sign: BridgeHubKusamaSigningParams {
+					bridge_hub_kusama_signer: Some("//Iden".into()),
+					bridge_hub_kusama_signer_password: None,
+					bridge_hub_kusama_signer_file: None,
+					bridge_hub_kusama_signer_password_file: None,
+					bridge_hub_kusama_transactions_mortality: Some(64),
+				},
+				left_relay: KusamaConnectionParams {
+					kusama_host: "kusama-alice".into(),
+					kusama_port: 9944,
+					kusama_secure: false,
+					kusama_runtime_version: KusamaRuntimeVersionParams {
+						kusama_version_mode: RuntimeVersionType::Bundle,
+						kusama_spec_version: None,
+						kusama_transaction_version: None,
+					},
+				},
+				right: BridgeHubPolkadotConnectionParams {
+					bridge_hub_polkadot_host: "bridge-hub-polkadot-collator1".into(),
+					bridge_hub_polkadot_port: 9944,
+					bridge_hub_polkadot_secure: false,
+					bridge_hub_polkadot_runtime_version: BridgeHubPolkadotRuntimeVersionParams {
+						bridge_hub_polkadot_version_mode: RuntimeVersionType::Bundle,
+						bridge_hub_polkadot_spec_version: None,
+						bridge_hub_polkadot_transaction_version: None,
+					},
+				},
+				right_sign: BridgeHubPolkadotSigningParams {
+					bridge_hub_polkadot_signer: Some("//George".into()),
+					bridge_hub_polkadot_signer_password: None,
+					bridge_hub_polkadot_signer_file: None,
+					bridge_hub_polkadot_signer_password_file: None,
+					bridge_hub_polkadot_transactions_mortality: Some(64),
+				},
+				right_relay: PolkadotConnectionParams {
+					polkadot_host: "polkadot-alice".into(),
+					polkadot_port: 9944,
+					polkadot_secure: false,
+					polkadot_runtime_version: PolkadotRuntimeVersionParams {
+						polkadot_version_mode: RuntimeVersionType::Bundle,
+						polkadot_spec_version: None,
+						polkadot_transaction_version: None,
+					},
+				},
+			}
+		);
+	}
+}

bridges/relays/lib-substrate-relay/src/cli/relay_headers_and_messages/parachain_to_parachain.rs

@@ -14,26 +14,28 @@
 // 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/>.
 
+//! Parachain to parachain relayer CLI primitives.
+
 use async_trait::async_trait;
 use std::sync::Arc;
 
-use crate::cli::{
+use crate::{
+	cli::{
 		bridge::{CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge},
 		relay_headers_and_messages::{Full2WayBridgeBase, Full2WayBridgeCommonParams},
-	CliChain,
+	},
-};
-use bp_polkadot_core::parachains::ParaHash;
-use pallet_bridge_parachains::{RelayBlockHash, RelayBlockHasher, RelayBlockNumber};
-use relay_substrate_client::{
-	AccountIdOf, AccountKeyPairOf, Chain, ChainWithTransactions, Client, Parachain,
-};
-use sp_core::Pair;
-use substrate_relay_helper::{
 	finality::SubstrateFinalitySyncPipeline,
 	on_demand::{
 		headers::OnDemandHeadersRelay, parachains::OnDemandParachainsRelay, OnDemandRelay,
 	},
 };
+use bp_polkadot_core::parachains::ParaHash;
+use pallet_bridge_parachains::{RelayBlockHash, RelayBlockHasher, RelayBlockNumber};
+use relay_substrate_client::{
+	AccountIdOf, AccountKeyPairOf, Chain, ChainWithRuntimeVersion, ChainWithTransactions, Client,
+	Parachain,
+};
+use sp_core::Pair;
 
 /// A base relay between two parachain from different consensus systems.
 ///
@@ -55,6 +57,8 @@ pub struct ParachainToParachainBridge<
 	pub right_relay: Client<<R2L as ParachainToRelayHeadersCliBridge>::SourceRelay>,
 }
 
+/// Create set of configuration objects specific to parachain-to-parachain relayer.
+#[macro_export]
 macro_rules! declare_parachain_to_parachain_bridge_schema {
 	// left-parachain, relay-chain-of-left-parachain, right-parachain, relay-chain-of-right-parachain
 	($left_parachain:ident, $left_chain:ident, $right_parachain:ident, $right_chain:ident) => {
@@ -87,20 +91,20 @@ macro_rules! declare_parachain_to_parachain_bridge_schema {
 
 			impl [<$left_parachain $right_parachain HeadersAndMessages>] {
 				async fn into_bridge<
-					Left: ChainWithTransactions + CliChain + Parachain,
+					Left: ChainWithTransactions + ChainWithRuntimeVersion + Parachain,
-					LeftRelay: CliChain,
+					LeftRelay: ChainWithRuntimeVersion,
-					Right: ChainWithTransactions + CliChain + Parachain,
+					Right: ChainWithTransactions + ChainWithRuntimeVersion + Parachain,
-					RightRelay: CliChain,
+					RightRelay: ChainWithRuntimeVersion,
-					L2R: CliBridgeBase<Source = Left, Target = Right>
+					L2R: $crate::cli::bridge::CliBridgeBase<Source = Left, Target = Right>
 						+ MessagesCliBridge
-						+ ParachainToRelayHeadersCliBridge<SourceRelay = LeftRelay>,
+						+ $crate::cli::bridge::ParachainToRelayHeadersCliBridge<SourceRelay = LeftRelay>,
-					R2L: CliBridgeBase<Source = Right, Target = Left>
+					R2L: $crate::cli::bridge::CliBridgeBase<Source = Right, Target = Left>
 						+ MessagesCliBridge
-						+ ParachainToRelayHeadersCliBridge<SourceRelay = RightRelay>,
+						+ $crate::cli::bridge::ParachainToRelayHeadersCliBridge<SourceRelay = RightRelay>,
 				>(
 					self,
-				) -> anyhow::Result<ParachainToParachainBridge<L2R, R2L>> {
+				) -> anyhow::Result<$crate::cli::relay_headers_and_messages::parachain_to_parachain::ParachainToParachainBridge<L2R, R2L>> {
-					Ok(ParachainToParachainBridge {
+					Ok($crate::cli::relay_headers_and_messages::parachain_to_parachain::ParachainToParachainBridge {
 						common: Full2WayBridgeCommonParams::new::<L2R>(
 							self.shared,
 							BridgeEndCommonParams {
@@ -125,12 +129,12 @@ macro_rules! declare_parachain_to_parachain_bridge_schema {
 
 #[async_trait]
 impl<
-		Left: Chain<Hash = ParaHash> + ChainWithTransactions + CliChain + Parachain,
+		Left: Chain<Hash = ParaHash> + ChainWithTransactions + ChainWithRuntimeVersion + Parachain,
-		Right: Chain<Hash = ParaHash> + ChainWithTransactions + CliChain + Parachain,
+		Right: Chain<Hash = ParaHash> + ChainWithTransactions + ChainWithRuntimeVersion + Parachain,
 		LeftRelay: Chain<BlockNumber = RelayBlockNumber, Hash = RelayBlockHash, Hasher = RelayBlockHasher>
-			+ CliChain,
+			+ ChainWithRuntimeVersion,
 		RightRelay: Chain<BlockNumber = RelayBlockNumber, Hash = RelayBlockHash, Hasher = RelayBlockHasher>
-			+ CliChain,
+			+ ChainWithRuntimeVersion,
 		L2R: CliBridgeBase<Source = Left, Target = Right>
 			+ MessagesCliBridge
 			+ ParachainToRelayHeadersCliBridge<SourceRelay = LeftRelay>,

bridges/relays/lib-substrate-relay/src/cli/relay_headers_and_messages/relay_to_parachain.rs

@@ -14,29 +14,31 @@
 // 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/>.
 
+//! Relay chain to parachain relayer CLI primitives.
+
 use async_trait::async_trait;
 use std::sync::Arc;
 
-use crate::cli::{
+use crate::{
+	cli::{
 		bridge::{
 			CliBridgeBase, MessagesCliBridge, ParachainToRelayHeadersCliBridge,
 			RelayToRelayHeadersCliBridge,
 		},
 		relay_headers_and_messages::{Full2WayBridgeBase, Full2WayBridgeCommonParams},
-	CliChain,
+	},
-};
-use bp_polkadot_core::parachains::ParaHash;
-use pallet_bridge_parachains::{RelayBlockHash, RelayBlockHasher, RelayBlockNumber};
-use relay_substrate_client::{
-	AccountIdOf, AccountKeyPairOf, Chain, ChainWithTransactions, Client, Parachain,
-};
-use sp_core::Pair;
-use substrate_relay_helper::{
 	finality::SubstrateFinalitySyncPipeline,
 	on_demand::{
 		headers::OnDemandHeadersRelay, parachains::OnDemandParachainsRelay, OnDemandRelay,
 	},
 };
+use bp_polkadot_core::parachains::ParaHash;
+use pallet_bridge_parachains::{RelayBlockHash, RelayBlockHasher, RelayBlockNumber};
+use relay_substrate_client::{
+	AccountIdOf, AccountKeyPairOf, Chain, ChainWithRuntimeVersion, ChainWithTransactions, Client,
+	Parachain,
+};
+use sp_core::Pair;
 
 /// A base relay between standalone (relay) chain and a parachain from another consensus system.
 ///
@@ -55,6 +57,8 @@ pub struct RelayToParachainBridge<
 	pub right_relay: Client<<R2L as ParachainToRelayHeadersCliBridge>::SourceRelay>,
 }
 
+/// Create set of configuration objects specific to relay-to-parachain relayer.
+#[macro_export]
 macro_rules! declare_relay_to_parachain_bridge_schema {
 	// chain, parachain, relay-chain-of-parachain
 	($left_chain:ident, $right_parachain:ident, $right_chain:ident) => {
@@ -84,9 +88,9 @@ macro_rules! declare_relay_to_parachain_bridge_schema {
 
 			impl [<$left_chain $right_parachain HeadersAndMessages>] {
 				async fn into_bridge<
-					Left: ChainWithTransactions + CliChain,
+					Left: ChainWithTransactions + ChainWithRuntimeVersion,
-					Right: ChainWithTransactions + CliChain + Parachain,
+					Right: ChainWithTransactions + ChainWithRuntimeVersion + Parachain,
-					RightRelay: CliChain,
+					RightRelay: ChainWithRuntimeVersion,
 					L2R: CliBridgeBase<Source = Left, Target = Right> + MessagesCliBridge + RelayToRelayHeadersCliBridge,
 					R2L: CliBridgeBase<Source = Right, Target = Left>
 						+ MessagesCliBridge
@@ -118,10 +122,10 @@ macro_rules! declare_relay_to_parachain_bridge_schema {
 
 #[async_trait]
 impl<
-		Left: ChainWithTransactions + CliChain,
+		Left: ChainWithTransactions + ChainWithRuntimeVersion,
-		Right: Chain<Hash = ParaHash> + ChainWithTransactions + CliChain + Parachain,
+		Right: Chain<Hash = ParaHash> + ChainWithTransactions + ChainWithRuntimeVersion + Parachain,
 		RightRelay: Chain<BlockNumber = RelayBlockNumber, Hash = RelayBlockHash, Hasher = RelayBlockHasher>
-			+ CliChain,
+			+ ChainWithRuntimeVersion,
 		L2R: CliBridgeBase<Source = Left, Target = Right>
 			+ MessagesCliBridge
 			+ RelayToRelayHeadersCliBridge,

bridges/relays/lib-substrate-relay/src/cli/relay_headers_and_messages/relay_to_relay.rs

@@ -18,20 +18,23 @@
 // future
 #![allow(unused_macros)]
 
+//! Relay chain to Relay chain relayer CLI primitives.
+
 use async_trait::async_trait;
 use std::sync::Arc;
 
-use crate::cli::{
+use crate::{
+	cli::{
 		bridge::{CliBridgeBase, MessagesCliBridge, RelayToRelayHeadersCliBridge},
 		relay_headers_and_messages::{Full2WayBridgeBase, Full2WayBridgeCommonParams},
-	CliChain,
+	},
-};
-use relay_substrate_client::{AccountIdOf, AccountKeyPairOf, ChainWithTransactions};
-use sp_core::Pair;
-use substrate_relay_helper::{
 	finality::SubstrateFinalitySyncPipeline,
 	on_demand::{headers::OnDemandHeadersRelay, OnDemandRelay},
 };
+use relay_substrate_client::{
+	AccountIdOf, AccountKeyPairOf, ChainWithRuntimeVersion, ChainWithTransactions,
+};
+use sp_core::Pair;
 
 /// A base relay between two standalone (relay) chains.
 ///
@@ -45,6 +48,7 @@ pub struct RelayToRelayBridge<
 		Full2WayBridgeCommonParams<<R2L as CliBridgeBase>::Target, <L2R as CliBridgeBase>::Target>,
 }
 
+/// Create set of configuration objects specific to relay-to-relay relayer.
 macro_rules! declare_relay_to_relay_bridge_schema {
 	($left_chain:ident, $right_chain:ident) => {
 		bp_runtime::paste::item! {
@@ -101,8 +105,8 @@ macro_rules! declare_relay_to_relay_bridge_schema {
 
 #[async_trait]
 impl<
-		Left: ChainWithTransactions + CliChain,
+		Left: ChainWithTransactions + ChainWithRuntimeVersion,
-		Right: ChainWithTransactions + CliChain,
+		Right: ChainWithTransactions + ChainWithRuntimeVersion,
 		L2R: CliBridgeBase<Source = Left, Target = Right>
 			+ MessagesCliBridge
 			+ RelayToRelayHeadersCliBridge,

bridges/relays/lib-substrate-relay/src/cli/relay_messages.rs

@@ -0,0 +1,89 @@
+// 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/>.
+
+//! Primitives for exposing the messages relaying functionality in the CLI.
+
+use crate::{
+	cli::{bridge::*, chain_schema::*, HexLaneId, PrometheusParams},
+	messages_lane::MessagesRelayParams,
+	TransactionParams,
+};
+
+use async_trait::async_trait;
+use sp_core::Pair;
+use structopt::StructOpt;
+
+use relay_substrate_client::{
+	AccountIdOf, AccountKeyPairOf, BalanceOf, ChainWithRuntimeVersion, ChainWithTransactions,
+};
+
+/// Messages relaying params.
+#[derive(StructOpt)]
+pub struct RelayMessagesParams {
+	/// Hex-encoded lane id that should be served by the relay. Defaults to `00000000`.
+	#[structopt(long, default_value = "00000000")]
+	lane: HexLaneId,
+	#[structopt(flatten)]
+	source: SourceConnectionParams,
+	#[structopt(flatten)]
+	source_sign: SourceSigningParams,
+	#[structopt(flatten)]
+	target: TargetConnectionParams,
+	#[structopt(flatten)]
+	target_sign: TargetSigningParams,
+	#[structopt(flatten)]
+	prometheus_params: PrometheusParams,
+}
+
+/// Trait used for relaying messages between 2 chains.
+#[async_trait]
+pub trait MessagesRelayer: MessagesCliBridge
+where
+	Self::Source: ChainWithTransactions + ChainWithRuntimeVersion,
+	AccountIdOf<Self::Source>: From<<AccountKeyPairOf<Self::Source> as Pair>::Public>,
+	AccountIdOf<Self::Target>: From<<AccountKeyPairOf<Self::Target> as Pair>::Public>,
+	BalanceOf<Self::Source>: TryFrom<BalanceOf<Self::Target>>,
+{
+	/// Start relaying messages.
+	async fn relay_messages(data: RelayMessagesParams) -> anyhow::Result<()> {
+		let source_client = data.source.into_client::<Self::Source>().await?;
+		let source_sign = data.source_sign.to_keypair::<Self::Source>()?;
+		let source_transactions_mortality = data.source_sign.transactions_mortality()?;
+		let target_client = data.target.into_client::<Self::Target>().await?;
+		let target_sign = data.target_sign.to_keypair::<Self::Target>()?;
+		let target_transactions_mortality = data.target_sign.transactions_mortality()?;
+
+		crate::messages_lane::run::<Self::MessagesLane>(MessagesRelayParams {
+			source_client,
+			source_transaction_params: TransactionParams {
+				signer: source_sign,
+				mortality: source_transactions_mortality,
+			},
+			target_client,
+			target_transaction_params: TransactionParams {
+				signer: target_sign,
+				mortality: target_transactions_mortality,
+			},
+			source_to_target_headers_relay: None,
+			target_to_source_headers_relay: None,
+			lane_id: data.lane.into(),
+			limits: Self::maybe_messages_limits(),
+			metrics_params: data.prometheus_params.into_metrics_params()?,
+		})
+		.await
+		.map_err(|e| anyhow::format_err!("{}", e))
+	}
+}

bridges/relays/lib-substrate-relay/src/cli/relay_parachains.rs

@@ -0,0 +1,91 @@
+// 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/>.
+
+//! Primitives for exposing the parachains finality relaying functionality in the CLI.
+
+use async_std::sync::Mutex;
+use async_trait::async_trait;
+use parachains_relay::parachains_loop::{AvailableHeader, SourceClient, TargetClient};
+use relay_substrate_client::Parachain;
+use relay_utils::metrics::{GlobalMetrics, StandaloneMetric};
+use std::sync::Arc;
+use structopt::StructOpt;
+
+use crate::{
+	cli::{
+		bridge::{CliBridgeBase, ParachainToRelayHeadersCliBridge},
+		chain_schema::*,
+		PrometheusParams,
+	},
+	parachains::{source::ParachainsSource, target::ParachainsTarget, ParachainsPipelineAdapter},
+	TransactionParams,
+};
+
+/// Parachains heads relaying params.
+#[derive(StructOpt)]
+pub struct RelayParachainsParams {
+	#[structopt(flatten)]
+	source: SourceConnectionParams,
+	#[structopt(flatten)]
+	target: TargetConnectionParams,
+	#[structopt(flatten)]
+	target_sign: TargetSigningParams,
+	#[structopt(flatten)]
+	prometheus_params: PrometheusParams,
+}
+
+/// Trait used for relaying parachains finality between 2 chains.
+#[async_trait]
+pub trait ParachainsRelayer: ParachainToRelayHeadersCliBridge
+where
+	ParachainsSource<Self::ParachainFinality>:
+		SourceClient<ParachainsPipelineAdapter<Self::ParachainFinality>>,
+	ParachainsTarget<Self::ParachainFinality>:
+		TargetClient<ParachainsPipelineAdapter<Self::ParachainFinality>>,
+	<Self as CliBridgeBase>::Source: Parachain,
+{
+	/// Start relaying parachains finality.
+	async fn relay_parachains(data: RelayParachainsParams) -> anyhow::Result<()> {
+		let source_client = data.source.into_client::<Self::SourceRelay>().await?;
+		let source_client = ParachainsSource::<Self::ParachainFinality>::new(
+			source_client,
+			Arc::new(Mutex::new(AvailableHeader::Missing)),
+		);
+
+		let target_transaction_params = TransactionParams {
+			signer: data.target_sign.to_keypair::<Self::Target>()?,
+			mortality: data.target_sign.target_transactions_mortality,
+		};
+		let target_client = data.target.into_client::<Self::Target>().await?;
+		let target_client = ParachainsTarget::<Self::ParachainFinality>::new(
+			target_client.clone(),
+			target_transaction_params,
+		);
+
+		let metrics_params: relay_utils::metrics::MetricsParams =
+			data.prometheus_params.into_metrics_params()?;
+		GlobalMetrics::new()?.register_and_spawn(&metrics_params.registry)?;
+
+		parachains_relay::parachains_loop::run(
+			source_client,
+			target_client,
+			metrics_params,
+			futures::future::pending(),
+		)
+		.await
+		.map_err(|e| anyhow::format_err!("{}", e))
+	}
+}

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

@@ -22,6 +22,7 @@ use relay_substrate_client::{Chain, ChainWithUtilityPallet, UtilityPallet};
 
 use std::marker::PhantomData;
 
+pub mod cli;
 pub mod equivocation;
 pub mod error;
 pub mod finality;