Rewards for relayers setup (#2194)

* Rewards for relayers setup

* ".git/.scripts/commands/bench/bench.sh" pallet bridge-hub-rococo bridge-hubs pallet_bridge_relayers

* Setup weight for relayer

* Setup `DeliveryConfirmationPayments` + `RefundRelayerForMessagesFromParachain`

* No need to have more than one collator per parachain

* Setup multi refund signed extensions

* Rewards sign ext test

* test

* fixes

---------

Co-authored-by: command-bot <>

Cargo.toml

@@ -8,6 +8,7 @@ members = [
 	"bridges/modules/parachains",
 	"bridges/modules/relayers",
 	"bridges/primitives/messages",
+	"bridges/primitives/relayers",
 	"bridges/primitives/runtime",
 	"bridges/primitives/chain-bridge-hub-rococo",
 	"bridges/primitives/chain-bridge-hub-wococo",

docs/release.md

@@ -123,7 +123,7 @@ for `release-parachains-v0.9.270`
 5. Clone `it/release-<version>-fast-sudo` from Polkadot
 In case the branch does not exists (it is a manual process): cherry pick paritytech/polkadot@791c8b8 and run
 `find . -type f -name "*.toml" -print0 | xargs -0 sed -i '' -e 's/polkadot-vX.X.X/polkadot-v<version>/g'`
-6. `cargo build --release features --fast-runtime`
+6. `cargo build --release --features fast-runtime`
 7. Copy `./target/polkadot` into `./bin` (in Cumulus)
 8. Run the tests:
 	- Statemint: `yarn zombienet-test -c ./examples/statemint/config.toml -t ./examples/statemint`

parachains/runtimes/bridge-hubs/bridge-hub-rococo/Cargo.toml

@@ -77,6 +77,7 @@ bp-bridge-hub-wococo = { path = "../../../../bridges/primitives/chain-bridge-hub
 bp-messages = { path = "../../../../bridges/primitives/messages", default-features = false }
 bp-parachains = { path = "../../../../bridges/primitives/parachains", default-features = false }
 bp-polkadot-core = { path = "../../../../bridges/primitives/polkadot-core", default-features = false }
+bp-relayers = { path = "../../../../bridges/primitives/relayers", default-features = false }
 bp-runtime = { path = "../../../../bridges/primitives/runtime", default-features = false }
 bp-rococo = { path = "../../../../bridges/primitives/chain-rococo", default-features = false }
 bp-wococo = { path = "../../../../bridges/primitives/chain-wococo", default-features = false }
@@ -101,6 +102,7 @@ std = [
 	"bp-messages/std",
 	"bp-parachains/std",
 	"bp-polkadot-core/std",
+	"bp-relayers/std",
 	"bp-runtime/std",
 	"bp-rococo/std",
 	"bp-wococo/std",

parachains/runtimes/bridge-hubs/bridge-hub-rococo/src/bridge_hub_rococo_config.rs

@@ -28,6 +28,10 @@ use bridge_runtime_common::{
 		source::FromBridgedChainMessagesDeliveryProof, target::FromBridgedChainMessagesProof,
 		MessageBridge, ThisChainWithMessages, UnderlyingChainProvider,
 	},
+	refund_relayer_extension::{
+		ActualFeeRefund, RefundBridgedParachainMessages, RefundableMessagesLane,
+		RefundableParachain,
+	},
 };
 use frame_support::{parameter_types, RuntimeDebug};
 use xcm::{
@@ -87,7 +91,7 @@ const DEFAULT_XCM_LANE_TO_BRIDGE_HUB_WOCOCO: LaneId = LaneId([0, 0, 0, 1]);
 pub struct WithBridgeHubWococoMessageBridge;
 impl MessageBridge for WithBridgeHubWococoMessageBridge {
 	const THIS_CHAIN_ID: ChainId = bp_runtime::BRIDGE_HUB_ROCOCO_CHAIN_ID;
-	const BRIDGED_CHAIN_ID: ChainId = bp_runtime::BRIDGE_HUB_WOCOCO_CHAIN_ID;
+	const BRIDGED_CHAIN_ID: ChainId = BridgeHubWococoChainId::get();
 	const BRIDGED_MESSAGES_PALLET_NAME: &'static str =
 		bp_bridge_hub_rococo::WITH_BRIDGE_HUB_ROCOCO_MESSAGES_PALLET_NAME;
 	type ThisChain = BridgeHubRococo;
@@ -147,6 +151,24 @@ impl ThisChainWithMessages for BridgeHubRococo {
 	}
 }
 
+/// Signed extension that refunds relayers that are delivering messages from the Wococo parachain.
+pub type BridgeRefundBridgeHubWococoMessages = RefundBridgedParachainMessages<
+	Runtime,
+	RefundableParachain<BridgeParachainWococoInstance, BridgeHubWococoParachainId>,
+	RefundableMessagesLane<WithBridgeHubWococoMessagesInstance, BridgeHubWococoMessagesLane>,
+	ActualFeeRefund<Runtime>,
+	StrBridgeRefundBridgeHubWococoMessages,
+>;
+bp_runtime::generate_static_str_provider!(BridgeRefundBridgeHubWococoMessages);
+
+parameter_types! {
+	pub const BridgeHubWococoMessagesLane: bp_messages::LaneId = DEFAULT_XCM_LANE_TO_BRIDGE_HUB_WOCOCO;
+	pub const BridgeHubWococoParachainId: u32 = {
+		use bp_runtime::Parachain;
+		BridgeHubWococo::PARACHAIN_ID
+	};
+}
+
 #[cfg(test)]
 mod tests {
 	use super::*;

parachains/runtimes/bridge-hubs/bridge-hub-rococo/src/bridge_hub_wococo_config.rs

@@ -28,6 +28,10 @@ use bridge_runtime_common::{
 		source::FromBridgedChainMessagesDeliveryProof, target::FromBridgedChainMessagesProof,
 		MessageBridge, ThisChainWithMessages, UnderlyingChainProvider,
 	},
+	refund_relayer_extension::{
+		ActualFeeRefund, RefundBridgedParachainMessages, RefundableMessagesLane,
+		RefundableParachain,
+	},
 };
 use frame_support::{parameter_types, RuntimeDebug};
 use xcm::{
@@ -87,7 +91,7 @@ const DEFAULT_XCM_LANE_TO_BRIDGE_HUB_ROCOCO: LaneId = LaneId([0, 0, 0, 1]);
 pub struct WithBridgeHubRococoMessageBridge;
 impl MessageBridge for WithBridgeHubRococoMessageBridge {
 	const THIS_CHAIN_ID: ChainId = bp_runtime::BRIDGE_HUB_WOCOCO_CHAIN_ID;
-	const BRIDGED_CHAIN_ID: ChainId = bp_runtime::BRIDGE_HUB_ROCOCO_CHAIN_ID;
+	const BRIDGED_CHAIN_ID: ChainId = BridgeHubRococoChainId::get();
 	const BRIDGED_MESSAGES_PALLET_NAME: &'static str =
 		bp_bridge_hub_wococo::WITH_BRIDGE_HUB_WOCOCO_MESSAGES_PALLET_NAME;
 	type ThisChain = BridgeHubWococo;
@@ -147,6 +151,24 @@ impl ThisChainWithMessages for BridgeHubWococo {
 	}
 }
 
+/// Signed extension that refunds relayers that are delivering messages from the Rococo parachain.
+pub type BridgeRefundBridgeHubRococoMessages = RefundBridgedParachainMessages<
+	Runtime,
+	RefundableParachain<BridgeParachainRococoInstance, BridgeHubRococoParachainId>,
+	RefundableMessagesLane<WithBridgeHubRococoMessagesInstance, BridgeHubRococoMessagesLane>,
+	ActualFeeRefund<Runtime>,
+	StrBridgeRefundBridgeHubRococoMessages,
+>;
+bp_runtime::generate_static_str_provider!(BridgeRefundBridgeHubRococoMessages);
+
+parameter_types! {
+	pub const BridgeHubRococoMessagesLane: bp_messages::LaneId = DEFAULT_XCM_LANE_TO_BRIDGE_HUB_ROCOCO;
+	pub const BridgeHubRococoParachainId: u32 = {
+		use bp_runtime::Parachain;
+		BridgeHubRococo::PARACHAIN_ID
+	};
+}
+
 #[cfg(test)]
 mod tests {
 	use super::*;

parachains/runtimes/bridge-hubs/bridge-hub-rococo/src/lib.rs

@@ -73,8 +73,14 @@ use polkadot_runtime_common::{BlockHashCount, SlowAdjustingFeeUpdate};
 use weights::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight};
 
 use crate::{
-	bridge_hub_rococo_config::{OnBridgeHubRococoBlobDispatcher, WithBridgeHubWococoMessageBridge},
-	bridge_hub_wococo_config::{OnBridgeHubWococoBlobDispatcher, WithBridgeHubRococoMessageBridge},
+	bridge_hub_rococo_config::{
+		BridgeRefundBridgeHubWococoMessages, OnBridgeHubRococoBlobDispatcher,
+		WithBridgeHubWococoMessageBridge,
+	},
+	bridge_hub_wococo_config::{
+		BridgeRefundBridgeHubRococoMessages, OnBridgeHubWococoBlobDispatcher,
+		WithBridgeHubRococoMessageBridge,
+	},
 	constants::fee::WeightToFee,
 	xcm_config::XcmRouter,
 };
@@ -113,6 +119,7 @@ pub type SignedExtra = (
 	frame_system::CheckWeight<Runtime>,
 	pallet_transaction_payment::ChargeTransactionPayment<Runtime>,
 	BridgeRejectObsoleteHeadersAndMessages,
+	(BridgeRefundBridgeHubRococoMessages, BridgeRefundBridgeHubWococoMessages),
 );
 
 /// Unchecked extrinsic type as expected by this runtime.
@@ -398,7 +405,7 @@ impl pallet_bridge_grandpa::Config<BridgeGrandpaWococoInstance> for Runtime {
 	type WeightInfo = weights::pallet_bridge_grandpa_bridge_wococo_grandpa::WeightInfo<Runtime>;
 }
 
-/// Add granda bridge pallet to track Rococo relay chain
+/// Add granda bridge pallet to track Rococo relay chain on Wococo BridgeHub
 pub type BridgeGrandpaRococoInstance = pallet_bridge_grandpa::Instance2;
 impl pallet_bridge_grandpa::Config<BridgeGrandpaRococoInstance> for Runtime {
 	type BridgedChain = bp_rococo::Rococo;
@@ -407,17 +414,19 @@ impl pallet_bridge_grandpa::Config<BridgeGrandpaRococoInstance> for Runtime {
 	type WeightInfo = weights::pallet_bridge_grandpa_bridge_rococo_grandpa::WeightInfo<Runtime>;
 }
 
-pub const ROCOCO_BRIDGE_PARA_PALLET_NAME: &str = "Paras";
-pub const WOCOCO_BRIDGE_PARA_PALLET_NAME: &str = "Paras";
 parameter_types! {
 	pub const RelayChainHeadersToKeep: u32 = 1024;
 	pub const ParachainHeadsToKeep: u32 = 64;
 	pub const MaxRequests: u32 = 64;
 
-	pub const RococoBridgeParachainPalletName: &'static str = ROCOCO_BRIDGE_PARA_PALLET_NAME;
-	pub const WococoBridgeParachainPalletName: &'static str = WOCOCO_BRIDGE_PARA_PALLET_NAME;
+	pub const RococoBridgeParachainPalletName: &'static str = "Paras";
+	pub const WococoBridgeParachainPalletName: &'static str = "Paras";
 	pub const MaxRococoParaHeadDataSize: u32 = bp_rococo::MAX_NESTED_PARACHAIN_HEAD_DATA_SIZE;
 	pub const MaxWococoParaHeadDataSize: u32 = bp_wococo::MAX_NESTED_PARACHAIN_HEAD_DATA_SIZE;
+
+	// TODO:check-parameter - setup initial values https://github.com/paritytech/parity-bridges-common/issues/1677
+	pub storage DeliveryRewardInBalance: u64 = 1_000_000;
+	pub storage ConfirmationRewardInBalance: u64 = 100_000;
 }
 
 /// Add parachain bridge pallet to track Wococo bridge hub parachain
@@ -464,13 +473,15 @@ impl pallet_bridge_messages::Config<WithBridgeHubWococoMessagesInstance> for Run
 
 	type InboundPayload = XcmAsPlainPayload;
 	type InboundRelayer = AccountId;
-	// TODO:check-parameter - check delivery
 	type DeliveryPayments = ();
 
 	type TargetHeaderChain = TargetHeaderChainAdapter<WithBridgeHubWococoMessageBridge>;
 	type LaneMessageVerifier = bridge_hub_rococo_config::ToBridgeHubWococoMessageVerifier;
-	// TODO:check-parameter - check delivery
-	type DeliveryConfirmationPayments = ();
+	type DeliveryConfirmationPayments = pallet_bridge_relayers::DeliveryConfirmationPaymentsAdapter<
+		Runtime,
+		DeliveryRewardInBalance,
+		ConfirmationRewardInBalance,
+	>;
 
 	type SourceHeaderChain = SourceHeaderChainAdapter<WithBridgeHubWococoMessageBridge>;
 	type MessageDispatch = XcmBlobMessageDispatch<
@@ -498,13 +509,15 @@ impl pallet_bridge_messages::Config<WithBridgeHubRococoMessagesInstance> for Run
 
 	type InboundPayload = XcmAsPlainPayload;
 	type InboundRelayer = AccountId;
-	// TODO:check-parameter - check delivery
 	type DeliveryPayments = ();
 
 	type TargetHeaderChain = TargetHeaderChainAdapter<WithBridgeHubRococoMessageBridge>;
 	type LaneMessageVerifier = bridge_hub_wococo_config::ToBridgeHubRococoMessageVerifier;
-	// TODO:check-parameter - check delivery
-	type DeliveryConfirmationPayments = ();
+	type DeliveryConfirmationPayments = pallet_bridge_relayers::DeliveryConfirmationPaymentsAdapter<
+		Runtime,
+		DeliveryRewardInBalance,
+		ConfirmationRewardInBalance,
+	>;
 
 	type SourceHeaderChain = SourceHeaderChainAdapter<WithBridgeHubRococoMessageBridge>;
 	type MessageDispatch = XcmBlobMessageDispatch<
@@ -514,6 +527,15 @@ impl pallet_bridge_messages::Config<WithBridgeHubRococoMessagesInstance> for Run
 	>;
 }
 
+/// Allows collect and claim rewards for relayers
+impl pallet_bridge_relayers::Config for Runtime {
+	type RuntimeEvent = RuntimeEvent;
+	type Reward = Balance;
+	type PaymentProcedure =
+		bp_relayers::PayLaneRewardFromAccount<pallet_balances::Pallet<Runtime>, AccountId>;
+	type WeightInfo = weights::pallet_bridge_relayers::WeightInfo<Runtime>;
+}
+
 // Create the runtime by composing the FRAME pallets that were previously configured.
 construct_runtime!(
 	pub enum Runtime where
@@ -564,6 +586,8 @@ construct_runtime!(
 		BridgeRococoGrandpa: pallet_bridge_grandpa::<Instance2>::{Pallet, Call, Storage, Config<T>} = 43,
 		BridgeRococoParachain: pallet_bridge_parachains::<Instance2>::{Pallet, Call, Storage, Event<T>} = 44,
 		BridgeRococoMessages: pallet_bridge_messages::<Instance2>::{Pallet, Call, Storage, Event<T>, Config<T>} = 45,
+
+		BridgeRelayers: pallet_bridge_relayers::{Pallet, Call, Storage, Event<T>} = 47,
 	}
 );
 
@@ -606,6 +630,8 @@ mod benches {
 		[pallet_bridge_grandpa, BridgeRococoGrandpa]
 		[pallet_bridge_parachains, BridgeParachainsBench::<Runtime, BridgeParachainRococoInstance>]
 		[pallet_bridge_messages, BridgeMessagesBench::<Runtime, WithBridgeHubRococoMessagesInstance>]
+		// Bridge relayer pallets
+		[pallet_bridge_relayers, BridgeRelayersBench::<Runtime>]
 	);
 }
 
@@ -841,6 +867,7 @@ impl_runtime_apis! {
 
 			use pallet_bridge_parachains::benchmarking::Pallet as BridgeParachainsBench;
 			use pallet_bridge_messages::benchmarking::Pallet as BridgeMessagesBench;
+			use pallet_bridge_relayers::benchmarking::Pallet as BridgeRelayersBench;
 
 			let mut list = Vec::<BenchmarkList>::new();
 			list_benchmarks!(list, extra);
@@ -950,9 +977,9 @@ impl_runtime_apis! {
 			};
 
 			impl BridgeMessagesConfig<WithBridgeHubWococoMessagesInstance> for Runtime {
-				fn is_relayer_rewarded(_: &Self::AccountId) -> bool {
-					// TODO: implement me properly
-					true
+				fn is_relayer_rewarded(relayer: &Self::AccountId) -> bool {
+					let bench_lane_id = <Self as BridgeMessagesConfig<WithBridgeHubWococoMessagesInstance>>::bench_lane_id();
+					pallet_bridge_relayers::Pallet::<Runtime>::relayer_reward(relayer, &bench_lane_id).is_some()
 				}
 
 				fn prepare_message_proof(
@@ -977,9 +1004,9 @@ impl_runtime_apis! {
 			}
 
 			impl BridgeMessagesConfig<WithBridgeHubRococoMessagesInstance> for Runtime {
-				fn is_relayer_rewarded(_: &Self::AccountId) -> bool {
-					// TODO: implement me properly
-					true
+				fn is_relayer_rewarded(relayer: &Self::AccountId) -> bool {
+					let bench_lane_id = <Self as BridgeMessagesConfig<WithBridgeHubRococoMessagesInstance>>::bench_lane_id();
+					pallet_bridge_relayers::Pallet::<Runtime>::relayer_reward(relayer, &bench_lane_id).is_some()
 				}
 
 				fn prepare_message_proof(
@@ -1008,6 +1035,10 @@ impl_runtime_apis! {
 				Config as BridgeParachainsConfig,
 				Pallet as BridgeParachainsBench,
 			};
+			use pallet_bridge_relayers::benchmarking::{
+				Pallet as BridgeRelayersBench,
+				Config as BridgeRelayersConfig,
+			};
 
 			impl BridgeParachainsConfig<BridgeParachainWococoInstance> for Runtime {
 				fn parachains() -> Vec<bp_polkadot_core::parachains::ParaId> {
@@ -1057,6 +1088,20 @@ impl_runtime_apis! {
 				}
 			}
 
+			impl BridgeRelayersConfig for Runtime {
+				fn prepare_environment(
+					lane: bp_messages::LaneId,
+					reward: Balance,
+				) {
+					use frame_support::traits::fungible::Mutate;
+					let lane_rewards_account = bp_relayers::PayLaneRewardFromAccount::<
+						Balances,
+						AccountId
+					>::lane_rewards_account(lane);
+					Balances::mint_into(&lane_rewards_account, reward).unwrap();
+				}
+			}
+
 			let whitelist: Vec<TrackedStorageKey> = vec![
 				// Block Number
 				hex_literal::hex!("26aa394eea5630e07c48ae0c9558cef702a5c1b19ab7a04f536c519aca4983ac").to_vec().into(),
@@ -1111,37 +1156,48 @@ cumulus_pallet_parachain_system::register_validate_block! {
 #[cfg(test)]
 mod tests {
 	use super::*;
-	use bridge_runtime_common::integrity::check_additional_signed;
+	use bp_runtime::TransactionEra;
+	use bridge_hub_test_utils::test_header;
 	use codec::Encode;
-	use sp_runtime::generic::Era;
 
 	#[test]
-	fn ensure_signed_extension_definition_is_correct() {
+	fn ensure_signed_extension_definition_is_compatible_with_relay() {
 		let payload: SignedExtra = (
 			frame_system::CheckNonZeroSender::new(),
 			frame_system::CheckSpecVersion::new(),
 			frame_system::CheckTxVersion::new(),
 			frame_system::CheckGenesis::new(),
-			frame_system::CheckEra::from(Era::Immortal),
+			frame_system::CheckEra::from(sp_runtime::generic::Era::Immortal),
 			frame_system::CheckNonce::from(10),
 			frame_system::CheckWeight::new(),
 			pallet_transaction_payment::ChargeTransactionPayment::from(10),
 			BridgeRejectObsoleteHeadersAndMessages {},
+			(
+				BridgeRefundBridgeHubRococoMessages::default(),
+				BridgeRefundBridgeHubWococoMessages::default(),
+			),
 		);
 
-		let bhr_indirect_payload = bp_bridge_hub_rococo::SignedExtension::new(
-			((), (), (), (), Era::Immortal, 10.into(), (), 10.into(), ()),
-			None,
-		);
+		let bhr_indirect_payload =
+			bp_bridge_hub_rococo::rewarding_bridge_signed_extension::from_params(
+				10,
+				10,
+				TransactionEra::Immortal,
+				test_header::<bridge_hub_test_utils::RelayBlockHeader>(1).hash(),
+				10,
+				10,
+			);
 		assert_eq!(payload.encode(), bhr_indirect_payload.encode());
 
-		let bhw_indirect_payload = bp_bridge_hub_wococo::SignedExtension::new(
-			((), (), (), (), Era::Immortal, 10.into(), (), 10.into(), ()),
-			None,
-		);
+		let bhw_indirect_payload =
+			bp_bridge_hub_wococo::rewarding_bridge_signed_extension::from_params(
+				10,
+				10,
+				TransactionEra::Immortal,
+				test_header::<bridge_hub_test_utils::RelayBlockHeader>(1).hash(),
+				10,
+				10,
+			);
 		assert_eq!(payload.encode(), bhw_indirect_payload.encode());
-
-		check_additional_signed::<SignedExtra, bp_bridge_hub_rococo::SignedExtension>();
-		check_additional_signed::<SignedExtra, bp_bridge_hub_wococo::SignedExtension>();
 	}
 }