remove account derivation functions (#1498)

bridges/bin/millau/runtime/src/lib.rs

@@ -461,8 +461,6 @@ impl pallet_bridge_messages::Config<WithRialtoMessagesInstance> for Runtime {
 	type InboundMessageFee = bp_rialto::Balance;
 	type InboundRelayer = bp_rialto::AccountId;
 
-	type AccountIdConverter = bp_millau::AccountIdConverter;
-
 	type TargetHeaderChain = crate::rialto_messages::Rialto;
 	type LaneMessageVerifier = crate::rialto_messages::ToRialtoMessageVerifier;
 	type MessageDeliveryAndDispatchPayment = ();
@@ -494,8 +492,6 @@ impl pallet_bridge_messages::Config<WithRialtoParachainMessagesInstance> for Run
 	type InboundMessageFee = bp_rialto_parachain::Balance;
 	type InboundRelayer = bp_rialto_parachain::AccountId;
 
-	type AccountIdConverter = bp_millau::AccountIdConverter;
-
 	type TargetHeaderChain = crate::rialto_parachain_messages::RialtoParachain;
 	type LaneMessageVerifier = crate::rialto_parachain_messages::ToRialtoParachainMessageVerifier;
 	type MessageDeliveryAndDispatchPayment = ();

bridges/bin/millau/runtime/src/rialto_messages.rs

@@ -371,7 +371,6 @@ mod tests {
 			bridge: WithRialtoMessageBridge,
 			this_chain: bp_millau::Millau,
 			bridged_chain: bp_rialto::Rialto,
-			this_chain_account_id_converter: bp_millau::AccountIdConverter
 		);
 
 		assert_complete_bridge_constants::<

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

@@ -528,8 +528,6 @@ impl pallet_bridge_messages::Config<WithMillauMessagesInstance> for Runtime {
 	type InboundMessageFee = bp_millau::Balance;
 	type InboundRelayer = bp_millau::AccountId;
 
-	type AccountIdConverter = bp_rialto_parachain::AccountIdConverter;
-
 	type TargetHeaderChain = crate::millau_messages::Millau;
 	type LaneMessageVerifier = crate::millau_messages::ToMillauMessageVerifier;
 	type MessageDeliveryAndDispatchPayment = ();

bridges/bin/rialto/runtime/src/lib.rs

@@ -445,8 +445,6 @@ impl pallet_bridge_messages::Config<WithMillauMessagesInstance> for Runtime {
 	type InboundMessageFee = bp_millau::Balance;
 	type InboundRelayer = bp_millau::AccountId;
 
-	type AccountIdConverter = bp_rialto::AccountIdConverter;
-
 	type TargetHeaderChain = crate::millau_messages::Millau;
 	type LaneMessageVerifier = crate::millau_messages::ToMillauMessageVerifier;
 	type MessageDeliveryAndDispatchPayment = ();

bridges/bin/rialto/runtime/src/millau_messages.rs

@@ -368,7 +368,6 @@ mod tests {
 			bridge: WithMillauMessageBridge,
 			this_chain: bp_rialto::Rialto,
 			bridged_chain: bp_millau::Millau,
-			this_chain_account_id_converter: bp_rialto::AccountIdConverter
 		);
 
 		assert_complete_bridge_constants::<

bridges/bin/runtime-common/src/integrity.rs

@@ -105,8 +105,7 @@ macro_rules! assert_bridge_messages_pallet_types(
 	(
 		runtime: $r:path,
 		with_bridged_chain_messages_instance: $i:path,
-		bridge: $bridge:path,
+		bridge: $bridge:path
-		this_chain_account_id_converter: $this_converter:path
 	) => {
 		{
 			// if one of asserts fail, then either bridge isn't configured properly (or alternatively - non-standard
@@ -127,8 +126,6 @@ macro_rules! assert_bridge_messages_pallet_types(
 			assert_type_eq_all!(<$r as MessagesConfig<$i>>::InboundMessageFee, BalanceOf<BridgedChain<$bridge>>);
 			assert_type_eq_all!(<$r as MessagesConfig<$i>>::InboundRelayer, AccountIdOf<BridgedChain<$bridge>>);
 
-			assert_type_eq_all!(<$r as MessagesConfig<$i>>::AccountIdConverter, $this_converter);
-
 			assert_type_eq_all!(<$r as MessagesConfig<$i>>::TargetHeaderChain, BridgedChain<$bridge>);
 			assert_type_eq_all!(<$r as MessagesConfig<$i>>::SourceHeaderChain, BridgedChain<$bridge>);
 		}
@@ -148,7 +145,6 @@ macro_rules! assert_complete_bridge_types(
 		bridge: $bridge:path,
 		this_chain: $this:path,
 		bridged_chain: $bridged:path,
-		this_chain_account_id_converter: $this_converter:path
 	) => {
 		$crate::assert_chain_types!(runtime: $r, this_chain: $this);
 		$crate::assert_bridge_types!(bridge: $bridge, this_chain: $this, bridged_chain: $bridged);
@@ -160,8 +156,7 @@ macro_rules! assert_complete_bridge_types(
 		$crate::assert_bridge_messages_pallet_types!(
 			runtime: $r,
 			with_bridged_chain_messages_instance: $mi,
-			bridge: $bridge,
+			bridge: $bridge
-			this_chain_account_id_converter: $this_converter
 		);
 	}
 );

bridges/modules/messages/src/benchmarking.rs

@@ -126,10 +126,8 @@ benchmarks_instance_pallet! {
 	// added.
 	send_minimal_message_worst_case {
 		let lane_id = T::bench_lane_id();
-		let relayers_fund_id = crate::relayer_fund_account_id::<T::AccountId, T::AccountIdConverter>();
 		let sender = account("sender", 0, SEED);
 		T::endow_account(&sender);
-		T::endow_account(&relayers_fund_id);
 
 		// 'send' messages that are to be pruned when our message is sent
 		for _nonce in 1..=T::MaxMessagesToPruneAtOnce::get() {
@@ -159,10 +157,8 @@ benchmarks_instance_pallet! {
 	// `(send_16_kb_message_worst_case - send_1_kb_message_worst_case) / 15`.
 	send_1_kb_message_worst_case {
 		let lane_id = T::bench_lane_id();
-		let relayers_fund_id = crate::relayer_fund_account_id::<T::AccountId, T::AccountIdConverter>();
 		let sender = account("sender", 0, SEED);
 		T::endow_account(&sender);
-		T::endow_account(&relayers_fund_id);
 
 		// 'send' messages that are to be pruned when our message is sent
 		for _nonce in 1..=T::MaxMessagesToPruneAtOnce::get() {
@@ -198,10 +194,8 @@ benchmarks_instance_pallet! {
 	// `(send_16_kb_message_worst_case - send_1_kb_message_worst_case) / 15`.
 	send_16_kb_message_worst_case {
 		let lane_id = T::bench_lane_id();
-		let relayers_fund_id = crate::relayer_fund_account_id::<T::AccountId, T::AccountIdConverter>();
 		let sender = account("sender", 0, SEED);
 		T::endow_account(&sender);
-		T::endow_account(&relayers_fund_id);
 
 		// 'send' messages that are to be pruned when our message is sent
 		for _nonce in 1..=T::MaxMessagesToPruneAtOnce::get() {
@@ -233,10 +227,8 @@ benchmarks_instance_pallet! {
 	//
 	// Result of this benchmark is directly used by weight formula of the call.
 	maximal_increase_message_fee {
-		let relayers_fund_id = crate::relayer_fund_account_id::<T::AccountId, T::AccountIdConverter>();
 		let sender = account("sender", 42, SEED);
 		T::endow_account(&sender);
-		T::endow_account(&relayers_fund_id);
 
 		let additional_fee = T::account_balance(&sender);
 		let lane_id = T::bench_lane_id();
@@ -257,10 +249,8 @@ benchmarks_instance_pallet! {
 	increase_message_fee {
 		let i in 0..T::maximal_message_size().try_into().unwrap_or_default();
 
-		let relayers_fund_id = crate::relayer_fund_account_id::<T::AccountId, T::AccountIdConverter>();
 		let sender = account("sender", 42, SEED);
 		T::endow_account(&sender);
-		T::endow_account(&relayers_fund_id);
 
 		let additional_fee = T::account_balance(&sender);
 		let lane_id = T::bench_lane_id();
@@ -488,10 +478,8 @@ benchmarks_instance_pallet! {
 	//
 	// This is base benchmark for all other confirmations delivery benchmarks.
 	receive_delivery_proof_for_single_message {
-		let relayers_fund_id = crate::relayer_fund_account_id::<T::AccountId, T::AccountIdConverter>();
 		let relayer_id: T::AccountId = account("relayer", 0, SEED);
 		let relayer_balance = T::account_balance(&relayer_id);
-		T::endow_account(&relayers_fund_id);
 
 		// send message that we're going to confirm
 		send_regular_message::<T, I>();
@@ -526,10 +514,8 @@ benchmarks_instance_pallet! {
 	// as `weight(receive_delivery_proof_for_two_messages_by_single_relayer)
 	//   - weight(receive_delivery_proof_for_single_message)`.
 	receive_delivery_proof_for_two_messages_by_single_relayer {
-		let relayers_fund_id = crate::relayer_fund_account_id::<T::AccountId, T::AccountIdConverter>();
 		let relayer_id: T::AccountId = account("relayer", 0, SEED);
 		let relayer_balance = T::account_balance(&relayer_id);
-		T::endow_account(&relayers_fund_id);
 
 		// send message that we're going to confirm
 		send_regular_message::<T, I>();
@@ -567,12 +553,10 @@ benchmarks_instance_pallet! {
 	// as `weight(receive_delivery_proof_for_two_messages_by_two_relayers)
 	//   - weight(receive_delivery_proof_for_two_messages_by_single_relayer)`.
 	receive_delivery_proof_for_two_messages_by_two_relayers {
-		let relayers_fund_id = crate::relayer_fund_account_id::<T::AccountId, T::AccountIdConverter>();
 		let relayer1_id: T::AccountId = account("relayer1", 1, SEED);
 		let relayer1_balance = T::account_balance(&relayer1_id);
 		let relayer2_id: T::AccountId = account("relayer2", 2, SEED);
 		let relayer2_balance = T::account_balance(&relayer2_id);
-		T::endow_account(&relayers_fund_id);
 
 		// send message that we're going to confirm
 		send_regular_message::<T, I>();

bridges/modules/messages/src/lib.rs

@@ -71,8 +71,6 @@ use frame_support::{
 	weights::{Pays, PostDispatchInfo},
 };
 use num_traits::{SaturatingAdd, Zero};
-use sp_core::H256;
-use sp_runtime::traits::Convert;
 use sp_std::{
 	cell::RefCell, cmp::PartialOrd, collections::vec_deque::VecDeque, marker::PhantomData,
 	ops::RangeInclusive, prelude::*,
@@ -170,11 +168,6 @@ pub mod pallet {
 		/// bridged chain.
 		type InboundRelayer: Parameter + MaxEncodedLen;
 
-		/// A type which can be turned into an AccountId from a 256-bit hash.
-		///
-		/// Used when deriving the shared relayer fund account.
-		type AccountIdConverter: sp_runtime::traits::Convert<sp_core::hash::H256, Self::AccountId>;
-
 		// Types that are used by outbound_lane (on source chain).
 
 		/// Target header chain.
@@ -313,16 +306,14 @@ pub mod pallet {
 			T::MessageDeliveryAndDispatchPayment::pay_delivery_and_dispatch_fee(
 				&origin,
 				&additional_fee,
-				&relayer_fund_account_id::<T::AccountId, T::AccountIdConverter>(),
 			)
 			.map_err(|err| {
 				log::trace!(
 					target: LOG_TARGET,
-					"Submitter can't pay additional fee {:?} for the message {:?}/{:?} to {:?}: {:?}",
+					"Submitter can't pay additional fee {:?} for the message {:?}/{:?}: {:?}",
 					additional_fee,
 					lane_id,
 					nonce,
-					relayer_fund_account_id::<T::AccountId, T::AccountIdConverter>(),
 					err,
 				);
 
@@ -629,14 +620,11 @@ pub mod pallet {
 				});
 
 				// if some new messages have been confirmed, reward relayers
-				let relayer_fund_account =
-					relayer_fund_account_id::<T::AccountId, T::AccountIdConverter>();
 				<T as Config<I>>::MessageDeliveryAndDispatchPayment::pay_relayers_rewards(
 					lane_id,
 					lane_data.relayers,
 					&confirmation_relayer,
 					&received_range,
-					&relayer_fund_account,
 				);
 			}
 
@@ -787,16 +775,6 @@ pub mod pallet {
 	}
 }
 
-/// AccountId of the shared relayer fund account.
-///
-/// This account is passed to `MessageDeliveryAndDispatchPayment` trait, and depending
-/// on the implementation it can be used to store relayers rewards.
-pub fn relayer_fund_account_id<AccountId, AccountIdConverter: Convert<H256, AccountId>>(
-) -> AccountId {
-	let encoded_id = bp_runtime::derive_relayer_fund_account_id(bp_runtime::NO_INSTANCE_ID);
-	AccountIdConverter::convert(encoded_id)
-}
-
 impl<T, I>
 	bp_messages::source_chain::MessagesBridge<
 		T::Origin,
@@ -877,7 +855,6 @@ fn send_message<T: Config<I>, I: 'static>(
 	T::MessageDeliveryAndDispatchPayment::pay_delivery_and_dispatch_fee(
 		&submitter,
 		&delivery_and_dispatch_fee,
-		&relayer_fund_account_id::<T::AccountId, T::AccountIdConverter>(),
 	)
 	.map_err(|err| {
 		log::trace!(

bridges/modules/messages/src/mock.rs

@@ -68,14 +68,6 @@ pub struct TestPayload {
 pub type TestMessageFee = u64;
 pub type TestRelayer = u64;
 
-pub struct AccountIdConverter;
-
-impl sp_runtime::traits::Convert<H256, AccountId> for AccountIdConverter {
-	fn convert(hash: H256) -> AccountId {
-		hash.to_low_u64_ne()
-	}
-}
-
 type Block = frame_system::mocking::MockBlock<TestRuntime>;
 type UncheckedExtrinsic = frame_system::mocking::MockUncheckedExtrinsic<TestRuntime>;
 
@@ -182,8 +174,6 @@ impl Config for TestRuntime {
 	type InboundMessageFee = TestMessageFee;
 	type InboundRelayer = TestRelayer;
 
-	type AccountIdConverter = AccountIdConverter;
-
 	type TargetHeaderChain = TestTargetHeaderChain;
 	type LaneMessageVerifier = TestLaneMessageVerifier;
 	type MessageDeliveryAndDispatchPayment = TestMessageDeliveryAndDispatchPayment;
@@ -360,7 +350,6 @@ impl MessageDeliveryAndDispatchPayment<Origin, AccountId, TestMessageFee>
 	fn pay_delivery_and_dispatch_fee(
 		submitter: &Origin,
 		fee: &TestMessageFee,
-		_relayer_fund_account: &AccountId,
 	) -> Result<(), Self::Error> {
 		if frame_support::storage::unhashed::get(b":reject-message-fee:") == Some(true) {
 			return Err(TEST_ERROR)
@@ -376,7 +365,6 @@ impl MessageDeliveryAndDispatchPayment<Origin, AccountId, TestMessageFee>
 		message_relayers: VecDeque<UnrewardedRelayer<AccountId>>,
 		_confirmation_relayer: &AccountId,
 		received_range: &RangeInclusive<MessageNonce>,
-		_relayer_fund_account: &AccountId,
 	) {
 		let relayers_rewards =
 			calc_relayers_rewards::<TestRuntime, ()>(lane_id, message_relayers, received_range);

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

@@ -63,13 +63,6 @@ impl WeightToFeePolynomial for WeightToFee {
 	}
 }
 
-// We use this to get the account on Kusama (target) which is derived from Polkadot's (source)
-// account.
-pub fn derive_account_from_polkadot_id(id: bp_runtime::SourceAccount<AccountId>) -> AccountId {
-	let encoded_id = bp_runtime::derive_account_id(bp_runtime::POLKADOT_CHAIN_ID, id);
-	AccountIdConverter::convert(encoded_id)
-}
-
 /// Per-byte fee for Kusama transactions.
 pub const TRANSACTION_BYTE_FEE: Balance = 10 * 1_000_000_000_000 / 30_000 / 1_000;
 

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

@@ -32,7 +32,7 @@ use frame_system::limits;
 use scale_info::TypeInfo;
 use sp_core::{storage::StateVersion, Hasher as HasherT};
 use sp_runtime::{
-	traits::{Convert, IdentifyAccount, Verify},
+	traits::{IdentifyAccount, Verify},
 	FixedU128, MultiSignature, MultiSigner, Perbill,
 };
 use sp_std::prelude::*;
@@ -218,43 +218,6 @@ impl sp_runtime::traits::Hash for BlakeTwoAndKeccak256 {
 	}
 }
 
-/// Convert a 256-bit hash into an AccountId.
-pub struct AccountIdConverter;
-
-impl sp_runtime::traits::Convert<sp_core::H256, AccountId> for AccountIdConverter {
-	fn convert(hash: sp_core::H256) -> AccountId {
-		hash.to_fixed_bytes().into()
-	}
-}
-
-/// We use this to get the account on Millau (target) which is derived from Rialto's (source)
-/// account. We do this so we can fund the derived account on Millau at Genesis to it can pay
-/// transaction fees.
-///
-/// The reason we can use the same `AccountId` type for both chains is because they share the same
-/// development seed phrase.
-///
-/// Note that this should only be used for testing.
-pub fn derive_account_from_rialto_id(id: bp_runtime::SourceAccount<AccountId>) -> AccountId {
-	let encoded_id = bp_runtime::derive_account_id(bp_runtime::RIALTO_CHAIN_ID, id);
-	AccountIdConverter::convert(encoded_id)
-}
-
-/// We use this to get the account on Millau (target) which is derived from RialtoParachain's
-/// (source) account. We do this so we can fund the derived account on Millau at Genesis to it can
-/// pay transaction fees.
-///
-/// The reason we can use the same `AccountId` type for both chains is because they share the same
-/// development seed phrase.
-///
-/// Note that this should only be used for testing.
-pub fn derive_account_from_rialto_parachain_id(
-	id: bp_runtime::SourceAccount<AccountId>,
-) -> AccountId {
-	let encoded_id = bp_runtime::derive_account_id(bp_runtime::RIALTO_PARACHAIN_CHAIN_ID, id);
-	AccountIdConverter::convert(encoded_id)
-}
-
 frame_support::parameter_types! {
 	pub BlockLength: limits::BlockLength =
 		limits::BlockLength::max_with_normal_ratio(2 * 1024 * 1024, NORMAL_DISPATCH_RATIO);

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

@@ -63,13 +63,6 @@ impl WeightToFeePolynomial for WeightToFee {
 	}
 }
 
-// We use this to get the account on Polkadot (target) which is derived from Kusama's (source)
-// account.
-pub fn derive_account_from_kusama_id(id: bp_runtime::SourceAccount<AccountId>) -> AccountId {
-	let encoded_id = bp_runtime::derive_account_id(bp_runtime::KUSAMA_CHAIN_ID, id);
-	AccountIdConverter::convert(encoded_id)
-}
-
 /// Per-byte fee for Polkadot transactions.
 pub const TRANSACTION_BYTE_FEE: Balance = 10 * 10_000_000_000 / 100 / 1_000;
 

bridges/primitives/chain-rialto-parachain/src/lib.rs

@@ -29,7 +29,7 @@ use frame_support::{
 use frame_system::limits;
 use sp_core::Hasher as HasherT;
 use sp_runtime::{
-	traits::{BlakeTwo256, Convert, IdentifyAccount, Verify},
+	traits::{BlakeTwo256, IdentifyAccount, Verify},
 	FixedU128, MultiSignature, MultiSigner, Perbill,
 };
 use sp_std::vec::Vec;
@@ -161,15 +161,6 @@ impl Chain for RialtoParachain {
 	}
 }
 
-/// Convert a 256-bit hash into an AccountId.
-pub struct AccountIdConverter;
-
-impl Convert<sp_core::H256, AccountId> for AccountIdConverter {
-	fn convert(hash: sp_core::H256) -> AccountId {
-		hash.to_fixed_bytes().into()
-	}
-}
-
 frame_support::parameter_types! {
 	pub BlockLength: limits::BlockLength =
 		limits::BlockLength::max_with_normal_ratio(5 * 1024 * 1024, NORMAL_DISPATCH_RATIO);
@@ -218,19 +209,6 @@ pub const TO_RIALTO_PARACHAIN_MESSAGE_DETAILS_METHOD: &str =
 pub const FROM_RIALTO_PARACHAIN_MESSAGE_DETAILS_METHOD: &str =
 	"FromRialtoParachainInboundLaneApi_message_details";
 
-// We use this to get the account on RialtoParachain (target) which is derived from Millau's
-// (source) account. We do this so we can fund the derived account on RialtoParachain at Genesis to
-// it can pay transaction fees.
-//
-// The reason we can use the same `AccountId` type for both chains is because they share the same
-// development seed phrase.
-//
-// Note that this should only be used for testing.
-pub fn derive_account_from_millau_id(id: bp_runtime::SourceAccount<AccountId>) -> AccountId {
-	let encoded_id = bp_runtime::derive_account_id(bp_runtime::MILLAU_CHAIN_ID, id);
-	AccountIdConverter::convert(encoded_id)
-}
-
 sp_api::decl_runtime_apis! {
 	/// API for querying information about the finalized RialtoParachain headers.
 	///

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

@@ -29,7 +29,7 @@ use frame_support::{
 use frame_system::limits;
 use sp_core::Hasher as HasherT;
 use sp_runtime::{
-	traits::{BlakeTwo256, Convert, IdentifyAccount, Verify},
+	traits::{BlakeTwo256, IdentifyAccount, Verify},
 	FixedU128, MultiSignature, MultiSigner, Perbill,
 };
 use sp_std::prelude::*;
@@ -181,28 +181,6 @@ impl Chain for Rialto {
 	}
 }
 
-/// Convert a 256-bit hash into an AccountId.
-pub struct AccountIdConverter;
-
-impl Convert<sp_core::H256, AccountId> for AccountIdConverter {
-	fn convert(hash: sp_core::H256) -> AccountId {
-		hash.to_fixed_bytes().into()
-	}
-}
-
-// We use this to get the account on Rialto (target) which is derived from Millau's (source)
-// account. We do this so we can fund the derived account on Rialto at Genesis to it can pay
-// transaction fees.
-//
-// The reason we can use the same `AccountId` type for both chains is because they share the same
-// development seed phrase.
-//
-// Note that this should only be used for testing.
-pub fn derive_account_from_millau_id(id: bp_runtime::SourceAccount<AccountId>) -> AccountId {
-	let encoded_id = bp_runtime::derive_account_id(bp_runtime::MILLAU_CHAIN_ID, id);
-	AccountIdConverter::convert(encoded_id)
-}
-
 frame_support::parameter_types! {
 	pub BlockLength: limits::BlockLength =
 		limits::BlockLength::max_with_normal_ratio(5 * 1024 * 1024, NORMAL_DISPATCH_RATIO);

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

@@ -69,13 +69,6 @@ impl WeightToFeePolynomial for WeightToFee {
 	}
 }
 
-// We use this to get the account on Rococo (target) which is derived from Wococo's (source)
-// account.
-pub fn derive_account_from_wococo_id(id: bp_runtime::SourceAccount<AccountId>) -> AccountId {
-	let encoded_id = bp_runtime::derive_account_id(bp_runtime::WOCOCO_CHAIN_ID, id);
-	AccountIdConverter::convert(encoded_id)
-}
-
 /// Name of the With-Rococo GRANDPA pallet instance that is deployed at bridged chains.
 pub const WITH_ROCOCO_GRANDPA_PALLET_NAME: &str = "BridgeRococoGrandpa";
 /// Name of the With-Rococo messages pallet instance that is deployed at bridged chains.

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

@@ -79,13 +79,6 @@ impl sp_runtime::traits::Dispatchable for Call {
 	}
 }
 
-// We use this to get the account on Westend (target) which is derived from Rococo's (source)
-// account.
-pub fn derive_account_from_rococo_id(id: bp_runtime::SourceAccount<AccountId>) -> AccountId {
-	let encoded_id = bp_runtime::derive_account_id(bp_runtime::ROCOCO_CHAIN_ID, id);
-	AccountIdConverter::convert(encoded_id)
-}
-
 /// Name of the parachains pallet at the Westend runtime.
 pub const PARAS_PALLET_NAME: &str = "Paras";
 

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

@@ -38,13 +38,6 @@ pub type Wococo = PolkadotLike;
 /// conditions.
 pub const SESSION_LENGTH: BlockNumber = time_units::MINUTES;
 
-// We use this to get the account on Wococo (target) which is derived from Rococo's (source)
-// account.
-pub fn derive_account_from_rococo_id(id: bp_runtime::SourceAccount<AccountId>) -> AccountId {
-	let encoded_id = bp_runtime::derive_account_id(bp_runtime::ROCOCO_CHAIN_ID, id);
-	AccountIdConverter::convert(encoded_id)
-}
-
 /// Name of the With-Wococo GRANDPA pallet instance that is deployed at bridged chains.
 pub const WITH_WOCOCO_GRANDPA_PALLET_NAME: &str = "BridgeWococoGrandpa";
 /// Name of the With-Wococo messages pallet instance that is deployed at bridged chains.

bridges/primitives/messages/src/source_chain.rs

@@ -133,7 +133,6 @@ pub trait MessageDeliveryAndDispatchPayment<SenderOrigin, AccountId, Balance> {
 	fn pay_delivery_and_dispatch_fee(
 		submitter: &SenderOrigin,
 		fee: &Balance,
-		relayer_fund_account: &AccountId,
 	) -> Result<(), Self::Error>;
 
 	/// Pay rewards for delivering messages to the given relayers.
@@ -145,7 +144,6 @@ pub trait MessageDeliveryAndDispatchPayment<SenderOrigin, AccountId, Balance> {
 		messages_relayers: VecDeque<UnrewardedRelayer<AccountId>>,
 		confirmation_relayer: &AccountId,
 		received_range: &RangeInclusive<MessageNonce>,
-		relayer_fund_account: &AccountId,
 	);
 }
 
@@ -157,7 +155,6 @@ impl<SenderOrigin, AccountId, Balance>
 	fn pay_delivery_and_dispatch_fee(
 		_submitter: &SenderOrigin,
 		_fee: &Balance,
-		_relayer_fund_account: &AccountId,
 	) -> Result<(), Self::Error> {
 		Ok(())
 	}
@@ -167,7 +164,6 @@ impl<SenderOrigin, AccountId, Balance>
 		_messages_relayers: VecDeque<UnrewardedRelayer<AccountId>>,
 		_confirmation_relayer: &AccountId,
 		_received_range: &RangeInclusive<MessageNonce>,
-		_relayer_fund_account: &AccountId,
 	) {
 	}
 }
@@ -306,7 +302,6 @@ impl<SenderOrigin, AccountId, Balance>
 	fn pay_delivery_and_dispatch_fee(
 		_submitter: &SenderOrigin,
 		_fee: &Balance,
-		_relayer_fund_account: &AccountId,
 	) -> Result<(), Self::Error> {
 		Err(ALL_OUTBOUND_MESSAGES_REJECTED)
 	}
@@ -316,7 +311,6 @@ impl<SenderOrigin, AccountId, Balance>
 		_messages_relayers: VecDeque<UnrewardedRelayer<AccountId>>,
 		_confirmation_relayer: &AccountId,
 		_received_range: &RangeInclusive<MessageNonce>,
-		_relayer_fund_account: &AccountId,
 	) {
 	}
 }

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

@@ -390,15 +390,6 @@ impl Chain for PolkadotLike {
 	}
 }
 
-/// Convert a 256-bit hash into an AccountId.
-pub struct AccountIdConverter;
-
-impl Convert<sp_core::H256, AccountId> for AccountIdConverter {
-	fn convert(hash: sp_core::H256) -> AccountId {
-		hash.to_fixed_bytes().into()
-	}
-}
-
 /// Return a storage key for account data.
 ///
 /// This is based on FRAME storage-generation code from Substrate:

bridges/primitives/runtime/src/lib.rs

@@ -127,16 +127,6 @@ where
 	.into()
 }
 
-/// Derive the account ID of the shared relayer fund account.
-///
-/// This account is used to collect fees for relayers that are passing messages across the bridge.
-///
-/// The account ID can be the same across different instances of `pallet-bridge-messages` if the
-/// same `bridge_id` is used.
-pub fn derive_relayer_fund_account_id(bridge_id: ChainId) -> H256 {
-	("relayer-fund-account", bridge_id).using_encoded(blake2_256).into()
-}
-
 /// Anything that has size.
 pub trait Size {
 	/// Return size of this object (in bytes).

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

@@ -15,7 +15,6 @@
 // along with Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.
 
 use crate::cli::CliChain;
-use bp_runtime::{AccountIdOf, SourceAccount};
 use relay_substrate_client::{AccountKeyPairOf, Chain, TransactionSignScheme};
 use strum::{EnumString, EnumVariantNames};
 use substrate_relay_helper::{
@@ -82,11 +81,6 @@ pub trait MessagesCliBridge: CliBridgeBase {
 		SourceTransactionSignScheme = Self::Source,
 		TargetTransactionSignScheme = Self::Target,
 	>;
-
-	/// We use this to get the account on the target which is derived from the source account.
-	fn derive_account_from_id(
-		id: SourceAccount<AccountIdOf<Self::Source>>,
-	) -> AccountIdOf<Self::Target>;
 }
 
 //// `Millau` to `Rialto` bridge definition.
@@ -105,12 +99,6 @@ impl MessagesCliBridge for MillauToRialtoCliBridge {
 	const ESTIMATE_MESSAGE_FEE_METHOD: &'static str =
 		bp_rialto::TO_RIALTO_ESTIMATE_MESSAGE_FEE_METHOD;
 	type MessagesLane = crate::chains::millau_messages_to_rialto::MillauMessagesToRialto;
-
-	fn derive_account_from_id(
-		id: SourceAccount<AccountIdOf<Self::Source>>,
-	) -> AccountIdOf<Self::Target> {
-		bp_rialto::derive_account_from_millau_id(id)
-	}
 }
 
 //// `Rialto` to `Millau` bridge definition.
@@ -129,14 +117,6 @@ impl MessagesCliBridge for RialtoToMillauCliBridge {
 	const ESTIMATE_MESSAGE_FEE_METHOD: &'static str =
 		bp_millau::TO_MILLAU_ESTIMATE_MESSAGE_FEE_METHOD;
 	type MessagesLane = crate::chains::rialto_messages_to_millau::RialtoMessagesToMillau;
-
-	/// We use this to get the account on the target chain which is derived from
-	/// the source chain account.
-	fn derive_account_from_id(
-		id: SourceAccount<AccountIdOf<Self::Source>>,
-	) -> AccountIdOf<Self::Target> {
-		bp_millau::derive_account_from_rialto_id(id)
-	}
 }
 
 //// `Westend` to `Millau` bridge definition.
@@ -169,12 +149,6 @@ impl MessagesCliBridge for MillauToRialtoParachainCliBridge {
 		bp_rialto_parachain::TO_RIALTO_PARACHAIN_ESTIMATE_MESSAGE_FEE_METHOD;
 	type MessagesLane =
 		crate::chains::millau_messages_to_rialto_parachain::MillauMessagesToRialtoParachain;
-
-	fn derive_account_from_id(
-		id: SourceAccount<AccountIdOf<Self::Source>>,
-	) -> AccountIdOf<Self::Target> {
-		bp_rialto_parachain::derive_account_from_millau_id(id)
-	}
 }
 
 //// `RialtoParachain` to `Millau` bridge definition.
@@ -190,12 +164,6 @@ impl MessagesCliBridge for RialtoParachainToMillauCliBridge {
 		bp_millau::TO_MILLAU_ESTIMATE_MESSAGE_FEE_METHOD;
 	type MessagesLane =
 		crate::chains::rialto_parachain_messages_to_millau::RialtoParachainMessagesToMillau;
-
-	fn derive_account_from_id(
-		id: SourceAccount<AccountIdOf<Self::Source>>,
-	) -> AccountIdOf<Self::Target> {
-		bp_millau::derive_account_from_rialto_parachain_id(id)
-	}
 }
 
 //// `WestendParachain` to `Millau` bridge definition.

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

@@ -77,9 +77,6 @@ pub struct HeadersAndMessagesSharedParams {
 	lane: Vec<HexLaneId>,
 	#[structopt(long, possible_values = RelayerMode::VARIANTS, case_insensitive = true, default_value = "rational")]
 	relayer_mode: RelayerMode,
-	/// Create relayers fund accounts on both chains, if it does not exists yet.
-	#[structopt(long)]
-	create_relayers_fund_accounts: bool,
 	/// If passed, only mandatory headers (headers that are changing the GRANDPA authorities set)
 	/// are relayed.
 	#[structopt(long)]
@@ -185,9 +182,6 @@ macro_rules! select_bridge {
 				type Left = relay_millau_client::Millau;
 				type Right = relay_rialto_client::Rialto;
 
-				type LeftAccountIdConverter = bp_millau::AccountIdConverter;
-				type RightAccountIdConverter = bp_rialto::AccountIdConverter;
-
 				use crate::chains::{
 					millau_messages_to_rialto::MillauMessagesToRialto as LeftToRightMessageLane,
 					rialto_messages_to_millau::RialtoMessagesToMillau as RightToLeftMessageLane,
@@ -222,22 +216,6 @@ macro_rules! select_bridge {
 					).await
 				}
 
-				async fn left_create_account(
-					_left_client: Client<Left>,
-					_left_sign: <Left as TransactionSignScheme>::AccountKeyPair,
-					_account_id: AccountIdOf<Left>,
-				) -> anyhow::Result<()> {
-					Err(anyhow::format_err!("Account creation is not supported by this bridge"))
-				}
-
-				async fn right_create_account(
-					_right_client: Client<Right>,
-					_right_sign: <Right as TransactionSignScheme>::AccountKeyPair,
-					_account_id: AccountIdOf<Right>,
-				) -> anyhow::Result<()> {
-					Err(anyhow::format_err!("Account creation is not supported by this bridge"))
-				}
-
 				$generic
 			},
 			RelayHeadersAndMessages::MillauRialtoParachain(_) => {
@@ -246,9 +224,6 @@ macro_rules! select_bridge {
 				type Left = relay_millau_client::Millau;
 				type Right = relay_rialto_parachain_client::RialtoParachain;
 
-				type LeftAccountIdConverter = bp_millau::AccountIdConverter;
-				type RightAccountIdConverter = bp_rialto_parachain::AccountIdConverter;
-
 				use crate::chains::{
 					millau_messages_to_rialto_parachain::MillauMessagesToRialtoParachain as LeftToRightMessageLane,
 					rialto_parachain_messages_to_millau::RialtoParachainMessagesToMillau as RightToLeftMessageLane,
@@ -290,22 +265,6 @@ macro_rules! select_bridge {
 					).await
 				}
 
-				async fn left_create_account(
-					_left_client: Client<Left>,
-					_left_sign: <Left as TransactionSignScheme>::AccountKeyPair,
-					_account_id: AccountIdOf<Left>,
-				) -> anyhow::Result<()> {
-					Err(anyhow::format_err!("Account creation is not supported by this bridge"))
-				}
-
-				async fn right_create_account(
-					_right_client: Client<Right>,
-					_right_sign: <Right as TransactionSignScheme>::AccountKeyPair,
-					_account_id: AccountIdOf<Right>,
-				) -> anyhow::Result<()> {
-					Err(anyhow::format_err!("Account creation is not supported by this bridge"))
-				}
-
 				$generic
 			},
 		}
@@ -445,45 +404,6 @@ impl RelayHeadersAndMessages {
 				});
 			}
 
-			// optionally, create relayers fund account
-			if params.shared.create_relayers_fund_accounts {
-				let relayer_fund_acount_id = pallet_bridge_messages::relayer_fund_account_id::<
-					AccountIdOf<Left>,
-					LeftAccountIdConverter,
-				>();
-				let relayers_fund_account_balance =
-					left_client.free_native_balance(relayer_fund_acount_id.clone()).await;
-				if let Err(relay_substrate_client::Error::AccountDoesNotExist) =
-					relayers_fund_account_balance
-				{
-					log::info!(target: "bridge", "Going to create relayers fund account at {}.", Left::NAME);
-					left_create_account(
-						left_client.clone(),
-						left_sign.clone(),
-						relayer_fund_acount_id,
-					)
-					.await?;
-				}
-
-				let relayer_fund_acount_id = pallet_bridge_messages::relayer_fund_account_id::<
-					AccountIdOf<Right>,
-					RightAccountIdConverter,
-				>();
-				let relayers_fund_account_balance =
-					right_client.free_native_balance(relayer_fund_acount_id.clone()).await;
-				if let Err(relay_substrate_client::Error::AccountDoesNotExist) =
-					relayers_fund_account_balance
-				{
-					log::info!(target: "bridge", "Going to create relayers fund account at {}.", Right::NAME);
-					right_create_account(
-						right_client.clone(),
-						right_sign.clone(),
-						relayer_fund_acount_id,
-					)
-					.await?;
-				}
-			}
-
 			// start on-demand header relays
 			let (left_to_right_on_demand_headers, right_to_left_on_demand_headers) =
 				start_on_demand_relays(
@@ -785,7 +705,6 @@ mod tests {
 						HexLaneId([0x73, 0x77, 0x61, 0x70])
 					],
 					relayer_mode: RelayerMode::Rational,
-					create_relayers_fund_accounts: false,
 					only_mandatory_headers: false,
 					prometheus_params: PrometheusParams {
 						no_prometheus: false,
@@ -899,7 +818,6 @@ mod tests {
 					shared: HeadersAndMessagesSharedParams {
 						lane: vec![HexLaneId([0x00, 0x00, 0x00, 0x00])],
 						relayer_mode: RelayerMode::Rational,
-						create_relayers_fund_accounts: false,
 						only_mandatory_headers: false,
 						prometheus_params: PrometheusParams {
 							no_prometheus: false,