feat: post-register hook

Author: sander2

asset-registry/src/impls.rs

@@ -20,7 +20,7 @@ where
 	AssetId: AtLeast32BitUnsigned + Parameter + Member + TypeInfo + Default,
 	T: Config<AssetId = AssetId>,
 {
-	fn process_asset(id: Option<AssetId>, asset_metadata: Metadata) -> Result<(AssetId, Metadata), DispatchError> {
+	fn pre_register(id: Option<AssetId>, asset_metadata: Metadata) -> Result<(AssetId, Metadata), DispatchError> {
 		let next_id = LastAssetId::<T>::get()
 			.map(|x| x.saturating_add(AssetId::one()))
 			.unwrap_or_default();

asset-registry/src/lib.rs

@@ -49,7 +49,7 @@ pub mod module {
 
 		/// A filter ran upon metadata registration that assigns an is and
 		/// potentially modifies the supplied metadata.
-		type OnRegisterAsset: AssetProcessor<Self::AssetId, AssetMetadata<Self::Balance, Self::CustomMetadata>>;
+		type AssetProcessor: AssetProcessor<Self::AssetId, AssetMetadata<Self::Balance, Self::CustomMetadata>>;
 
 		/// The balance type.
 		type Balance: Parameter + Member + AtLeast32BitUnsigned + Default + Copy;
@@ -194,7 +194,7 @@ impl<T: Config> Pallet<T> {
 		metadata: AssetMetadata<T::Balance, T::CustomMetadata>,
 		asset_id: Option<T::AssetId>,
 	) -> DispatchResult {
-		let (asset_id, metadata) = T::OnRegisterAsset::process_asset(asset_id, metadata)?;
+		let (asset_id, metadata) = T::AssetProcessor::pre_register(asset_id, metadata)?;
 
 		Metadata::<T>::try_mutate(&asset_id, |maybe_metadata| -> DispatchResult {
 			// make sure this asset id has not been registered yet
@@ -209,6 +209,8 @@ impl<T: Config> Pallet<T> {
 			Self::do_insert_location(asset_id.clone(), location.clone())?;
 		}
 
+		T::AssetProcessor::post_register(asset_id.clone(), metadata.clone())?;
+
 		Self::deposit_event(Event::<T>::RegisteredAsset { asset_id, metadata });
 
 		Ok(())

asset-registry/src/mock/para.rs

@@ -105,7 +105,7 @@ impl orml_asset_registry::Config for Runtime {
 	type AssetId = u32;
 	type AuthorityOrigin = EnsureRoot<AccountId>;
 	type CustomMetadata = CustomMetadata;
-	type OnRegisterAsset =
+	type AssetProcessor =
 		orml_asset_registry::SequentialId<u32, orml_asset_registry::AssetMetadata<Balance, CustomMetadata>, Runtime>;
 	type WeightInfo = ();
 }

traits/src/asset_registry.rs

@@ -10,5 +10,8 @@ pub trait FixedConversionRateProvider {
 }
 
 pub trait AssetProcessor<AssetId, Metadata> {
-	fn process_asset(id: Option<AssetId>, asset_metadata: Metadata) -> Result<(AssetId, Metadata), DispatchError>;
+	fn pre_register(id: Option<AssetId>, asset_metadata: Metadata) -> Result<(AssetId, Metadata), DispatchError>;
+	fn post_register(_id: AssetId, _asset_metadata: Metadata) -> Result<(), DispatchError> {
+		Ok(())
+	}
 }