Check that channel exists when validating outbound message

parachain/pallets/outbound-queue/src/lib.rs

@@ -99,7 +99,7 @@ use frame_support::{
 };
 use snowbridge_core::{
 	outbound::{Fee, GasMeter, QueuedMessage, VersionedQueuedMessage, ETHER_DECIMALS},
-	BasicOperatingMode, ChannelId, StaticLookup,
+	BasicOperatingMode, Channel, ChannelId, StaticLookup,
 };
 use snowbridge_outbound_queue_merkle_tree::merkle_root;
 pub use snowbridge_outbound_queue_merkle_tree::MerkleProof;

parachain/pallets/outbound-queue/src/mock.rs

@@ -8,11 +8,12 @@ use frame_support::{
 	weights::IdentityFee,
 };
 
+use hex_literal::hex;
 use snowbridge_core::{
 	gwei, meth,
 	outbound::*,
 	pricing::{PricingParameters, Rewards},
-	ParaId, PRIMARY_GOVERNANCE_CHANNEL,
+	Channel, ParaId, StaticLookup, PRIMARY_GOVERNANCE_CHANNEL,
 };
 use sp_core::{ConstU32, ConstU8, H160, H256};
 use sp_runtime::{
@@ -93,6 +94,16 @@ parameter_types! {
 
 pub const DOT: u128 = 10_000_000_000;
 
+pub struct MockChannelLookup;
+impl StaticLookup for MockChannelLookup {
+	type Source = ChannelId;
+	type Target = Channel;
+
+	fn lookup(channel_id: Self::Source) -> Option<Self::Target> {
+		Some(Channel { agent_id: H256::zero(), para_id: 0.into() })
+	}
+}
+
 impl crate::Config for Test {
 	type RuntimeEvent = RuntimeEvent;
 	type Hashing = Keccak256;
@@ -103,6 +114,7 @@ impl crate::Config for Test {
 	type GasMeter = ConstantGasMeter;
 	type Balance = u128;
 	type PricingParameters = Parameters;
+	type ChannelLookup = MockChannelLookup;
 	type WeightToFee = IdentityFee<u128>;
 	type WeightInfo = ();
 }

parachain/pallets/system/src/mock.rs

@@ -178,6 +178,7 @@ impl snowbridge_outbound_queue::Config for Test {
 	type GasMeter = ConstantGasMeter;
 	type Balance = u128;
 	type PricingParameters = EthereumSystem;
+	type ChannelLookup = EthereumSystem;
 	type WeightToFee = IdentityFee<u128>;
 	type WeightInfo = ();
 }