Slash relayers for invalid transactions

bin/millau/runtime/src/lib.rs

@@ -372,6 +372,7 @@ parameter_types! {
 	/// Authorities are changing every 5 minutes.
 	pub const Period: BlockNumber = bp_millau::SESSION_LENGTH;
 	pub const Offset: BlockNumber = 0;
+	pub const RelayerStakeReserveId: [u8; 8] = *b"brdgrlrs";
 }
 
 impl pallet_session::Config for Runtime {
@@ -392,6 +393,14 @@ impl pallet_bridge_relayers::Config for Runtime {
 	type Reward = Balance;
 	type PaymentProcedure =
 		bp_relayers::PayRewardFromAccount<pallet_balances::Pallet<Runtime>, AccountId>;
+	type StakeAndSlash = pallet_bridge_relayers::StakeAndSlashNamed<
+		AccountId,
+		BlockNumber,
+		Balances,
+		RelayerStakeReserveId,
+		ConstU64<1_000>,
+		ConstU64<8>,
+	>;
 	type WeightInfo = ();
 }
 

bin/rialto-parachain/runtime/src/lib.rs

@@ -533,6 +533,7 @@ impl pallet_bridge_relayers::Config for Runtime {
 	type Reward = Balance;
 	type PaymentProcedure =
 		bp_relayers::PayRewardFromAccount<pallet_balances::Pallet<Runtime>, AccountId>;
+	type StakeAndSlash = ();
 	type WeightInfo = ();
 }
 

bin/rialto/runtime/src/lib.rs

@@ -389,6 +389,7 @@ impl pallet_bridge_relayers::Config for Runtime {
 	type Reward = Balance;
 	type PaymentProcedure =
 		bp_relayers::PayRewardFromAccount<pallet_balances::Pallet<Runtime>, AccountId>;
+	type StakeAndSlash = ();
 	type WeightInfo = ();
 }
 

bin/runtime-common/Cargo.toml

@@ -30,6 +30,7 @@ pallet-bridge-relayers = { path = "../../modules/relayers", default-features = f
 
 frame-support = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 frame-system = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
+pallet-balances = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-transaction-payment = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-utility = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-api = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
@@ -63,6 +64,7 @@ std = [
 	"frame-system/std",
 	"hash-db/std",
 	"log/std",
+	"pallet-balances/std",
 	"pallet-bridge-grandpa/std",
 	"pallet-bridge-messages/std",
 	"pallet-bridge-parachains/std",

bin/runtime-common/src/mock.rs

@@ -35,6 +35,7 @@ use crate::messages::{
 use bp_header_chain::{ChainWithGrandpa, HeaderChain};
 use bp_messages::{target_chain::ForbidInboundMessages, LaneId, MessageNonce};
 use bp_parachains::SingleParaStoredHeaderDataBuilder;
+use bp_relayers::PayRewardFromAccount;
 use bp_runtime::{Chain, ChainId, Parachain, UnderlyingChainProvider};
 use codec::{Decode, Encode};
 use frame_support::{
@@ -83,6 +84,20 @@ pub type BridgedChainHasher = BlakeTwo256;
 pub type BridgedChainHeader =
 	sp_runtime::generic::Header<BridgedChainBlockNumber, BridgedChainHasher>;
 
+/// Rewards payment procedure.
+pub type TestPaymentProcedure = PayRewardFromAccount<Balances, ThisChainAccountId>;
+/// Stake that we are using in tests.
+pub type TestStake = ConstU64<5_000>;
+/// Stake and slash mechanism to use in tests.
+pub type TestStakeAndSlash = pallet_bridge_relayers::StakeAndSlashNamed<
+	ThisChainAccountId,
+	ThisChainBlockNumber,
+	Balances,
+	ReserveId,
+	TestStake,
+	ConstU32<8>,
+>;
+
 /// Message lane used in tests.
 pub const TEST_LANE_ID: LaneId = LaneId([0, 0, 0, 0]);
 /// Bridged chain id used in tests.
@@ -128,6 +143,7 @@ parameter_types! {
 	pub MaximumMultiplier: Multiplier = sp_runtime::traits::Bounded::max_value();
 	pub const MaxUnrewardedRelayerEntriesAtInboundLane: MessageNonce = 16;
 	pub const MaxUnconfirmedMessagesAtInboundLane: MessageNonce = 1_000;
+	pub const ReserveId: [u8; 8] = *b"brdgrlrs";
 }
 
 impl frame_system::Config for TestRuntime {
@@ -244,7 +260,8 @@ impl pallet_bridge_messages::Config for TestRuntime {
 impl pallet_bridge_relayers::Config for TestRuntime {
 	type RuntimeEvent = RuntimeEvent;
 	type Reward = ThisChainBalance;
-	type PaymentProcedure = ();
+	type PaymentProcedure = TestPaymentProcedure;
+	type StakeAndSlash = TestStakeAndSlash;
 	type WeightInfo = ();
 }
 
@@ -400,3 +417,8 @@ impl ThisChainWithMessages for BridgedChain {
 }
 
 impl BridgedChainWithMessages for BridgedChain {}
+
+/// Run test within test externalities.
+pub fn run_test(test: impl FnOnce()) {
+	sp_io::TestExternalities::new(Default::default()).execute_with(test)
+}