feat: multilocation getter (given assetid)

Author: sander2

asset-registry/src/lib.rs

@@ -249,6 +249,16 @@ impl<T: Config> Pallet<T> {
 		Metadata::<T>::get(asset_id)
 	}
 
+	pub fn multilocation(asset_id: &T::AssetId) -> Result<Option<MultiLocation>, DispatchError> {
+		Metadata::<T>::get(asset_id)
+			.and_then(|metadata| {
+				metadata
+					.location
+					.map(|location| location.try_into().map_err(|()| Error::<T>::BadVersion.into()))
+			})
+			.transpose()
+	}
+
 	pub fn do_insert_location(asset_id: T::AssetId, location: VersionedMultiLocation) -> DispatchResult {
 		// if the metadata contains a location, set the LocationToAssetId
 		let location: MultiLocation = location.try_into().map_err(|()| Error::<T>::BadVersion)?;

asset-registry/src/mock/mod.rs

@@ -47,9 +47,7 @@ impl Convert<CurrencyId, Option<MultiLocation>> for CurrencyIdConvert {
 			CurrencyId::B1 => Some((Parent, Parachain(2), GeneralKey("B1".into())).into()),
 			CurrencyId::B2 => Some((Parent, Parachain(2), GeneralKey("B2".into())).into()),
 			CurrencyId::D => Some((Parent, Parachain(4), GeneralKey("D".into())).into()),
-			CurrencyId::RegisteredAsset(id) => {
-				AssetRegistry::metadata(id).and_then(|x| x.location.and_then(|x| x.try_into().ok()))
-			}
+			CurrencyId::RegisteredAsset(id) => AssetRegistry::multilocation(&id).unwrap_or_default(),
 		}
 	}
 }