get rid of LaneMessageVerifier (#2168) (#2764)

bridges/modules/messages/src/lib.rs

@@ -53,8 +53,7 @@ use crate::{
 
 use bp_messages::{
 	source_chain::{
-		DeliveryConfirmationPayments, LaneMessageVerifier, OnMessagesDelivered,
-		SendMessageArtifacts, TargetHeaderChain,
+		DeliveryConfirmationPayments, OnMessagesDelivered, SendMessageArtifacts, TargetHeaderChain,
 	},
 	target_chain::{
 		DeliveryPayments, DispatchMessage, MessageDispatch, ProvedLaneMessages, ProvedMessages,
@@ -155,8 +154,6 @@ pub mod pallet {
 
 		/// Target header chain.
 		type TargetHeaderChain: TargetHeaderChain<Self::OutboundPayload, Self::AccountId>;
-		/// Message payload verifier.
-		type LaneMessageVerifier: LaneMessageVerifier<Self::OutboundPayload>;
 		/// Delivery confirmation payments.
 		type DeliveryConfirmationPayments: DeliveryConfirmationPayments<Self::AccountId>;
 		/// Delivery confirmation callback.
@@ -723,20 +720,8 @@ fn send_message<T: Config<I>, I: 'static>(
 		Error::<T, I>::MessageRejectedByChainVerifier(err)
 	})?;
 
-	// now let's enforce any additional lane rules
-	let mut lane = outbound_lane::<T, I>(lane_id);
-	T::LaneMessageVerifier::verify_message(&lane_id, &lane.data(), &payload).map_err(|err| {
-		log::trace!(
-			target: LOG_TARGET,
-			"Message to lane {:?} is rejected by lane verifier: {:?}",
-			lane_id,
-			err,
-		);
-
-		Error::<T, I>::MessageRejectedByLaneVerifier(err)
-	})?;
-
 	// finally, save message in outbound storage and emit event
+	let mut lane = outbound_lane::<T, I>(lane_id);
 	let encoded_payload = payload.encode();
 	let encoded_payload_len = encoded_payload.len();
 	let nonce = lane
@@ -1151,21 +1136,6 @@ mod tests {
 		});
 	}
 
-	#[test]
-	fn lane_verifier_rejects_invalid_message_in_send_message() {
-		run_test(|| {
-			// messages with zero fee are rejected by lane verifier
-			let mut message = REGULAR_PAYLOAD;
-			message.reject_by_lane_verifier = true;
-			assert_noop!(
-				send_message::<TestRuntime, ()>(TEST_LANE_ID, message,),
-				Error::<TestRuntime, ()>::MessageRejectedByLaneVerifier(VerificationError::Other(
-					mock::TEST_ERROR
-				)),
-			);
-		});
-	}
-
 	#[test]
 	fn receive_messages_proof_works() {
 		run_test(|| {

bridges/modules/messages/src/mock.rs

@@ -21,15 +21,13 @@ use crate::Config;
 
 use bp_messages::{
 	calc_relayers_rewards,
-	source_chain::{
-		DeliveryConfirmationPayments, LaneMessageVerifier, OnMessagesDelivered, TargetHeaderChain,
-	},
+	source_chain::{DeliveryConfirmationPayments, OnMessagesDelivered, TargetHeaderChain},
 	target_chain::{
 		DeliveryPayments, DispatchMessage, DispatchMessageData, MessageDispatch,
 		ProvedLaneMessages, ProvedMessages, SourceHeaderChain,
 	},
 	DeliveredMessages, InboundLaneData, LaneId, Message, MessageKey, MessageNonce, MessagePayload,
-	OutboundLaneData, UnrewardedRelayer, UnrewardedRelayersState, VerificationError,
+	UnrewardedRelayer, UnrewardedRelayersState, VerificationError,
 };
 use bp_runtime::{messages::MessageDispatchResult, Size};
 use codec::{Decode, Encode};
@@ -50,8 +48,6 @@ pub type Balance = u64;
 pub struct TestPayload {
 	/// Field that may be used to identify messages.
 	pub id: u64,
-	/// Reject this message by lane verifier?
-	pub reject_by_lane_verifier: bool,
 	/// Dispatch weight that is declared by the message sender.
 	pub declared_weight: Weight,
 	/// Message dispatch result.
@@ -120,7 +116,6 @@ impl Config for TestRuntime {
 	type DeliveryPayments = TestDeliveryPayments;
 
 	type TargetHeaderChain = TestTargetHeaderChain;
-	type LaneMessageVerifier = TestLaneMessageVerifier;
 	type DeliveryConfirmationPayments = TestDeliveryConfirmationPayments;
 	type OnMessagesDelivered = TestOnMessagesDelivered;
 
@@ -268,24 +263,6 @@ impl TargetHeaderChain<TestPayload, TestRelayer> for TestTargetHeaderChain {
 	}
 }
 
-/// Lane message verifier that is used in tests.
-#[derive(Debug, Default)]
-pub struct TestLaneMessageVerifier;
-
-impl LaneMessageVerifier<TestPayload> for TestLaneMessageVerifier {
-	fn verify_message(
-		_lane: &LaneId,
-		_lane_outbound_data: &OutboundLaneData,
-		payload: &TestPayload,
-	) -> Result<(), VerificationError> {
-		if !payload.reject_by_lane_verifier {
-			Ok(())
-		} else {
-			Err(VerificationError::Other(TEST_ERROR))
-		}
-	}
-}
-
 /// Reward payments at the target chain during delivery transaction.
 #[derive(Debug, Default)]
 pub struct TestDeliveryPayments;
@@ -438,7 +415,6 @@ pub fn inbound_message_data(payload: TestPayload) -> DispatchMessageData<TestPay
 pub const fn message_payload(id: u64, declared_weight: u64) -> TestPayload {
 	TestPayload {
 		id,
-		reject_by_lane_verifier: false,
 		declared_weight: Weight::from_parts(declared_weight, 0),
 		dispatch_result: dispatch_result(0),
 		extra: Vec::new(),