feat(xcm): implement XcmEventEmitter (#535)

Author: al3mart

runtime/devnet/src/config/xcm.rs

@@ -174,6 +174,7 @@ impl xcm_executor::Config for XcmConfig {
 	// Teleporting is disabled.
 	type UniversalLocation = UniversalLocation;
 	type Weigher = FixedWeightBounds<UnitWeightCost, RuntimeCall, MaxInstructions>;
+	type XcmEventEmitter = PolkadotXcm;
 	type XcmRecorder = PolkadotXcm;
 	type XcmSender = XcmRouter;
 }

runtime/mainnet/src/config/xcm.rs

@@ -208,6 +208,7 @@ impl xcm_executor::Config for XcmConfig {
 	type UniversalLocation = UniversalLocation;
 	type Weigher =
 		WeightInfoBounds<xcm_weights::PopXcmWeight<RuntimeCall>, RuntimeCall, MaxInstructions>;
+	type XcmEventEmitter = PolkadotXcm;
 	type XcmRecorder = PolkadotXcm;
 	type XcmSender = XcmRouter;
 }
@@ -864,6 +865,14 @@ mod tests {
 			);
 		}
 
+		#[test]
+		fn uses_pallet_xcm_to_emit_events() {
+			assert_eq!(
+				TypeId::of::<<XcmConfig as xcm_executor::Config>::XcmEventEmitter>(),
+				TypeId::of::<PolkadotXcm>(),
+			);
+		}
+
 		#[test]
 		fn uses_xcm_as_recorder_for_dry_runs() {
 			assert_eq!(

runtime/testnet/src/config/xcm.rs

@@ -212,6 +212,7 @@ impl xcm_executor::Config for XcmConfig {
 	// Teleporting is disabled.
 	type UniversalLocation = UniversalLocation;
 	type Weigher = FixedWeightBounds<UnitWeightCost, RuntimeCall, MaxInstructions>;
+	type XcmEventEmitter = PolkadotXcm;
 	type XcmRecorder = PolkadotXcm;
 	type XcmSender = XcmRouter;
 }