rgb25: add allocations method

src/rgb25/wrapper.rs

@@ -19,7 +19,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use rgbstd::interface::{ContractIface, Iface, IfaceClass, IfaceId};
+use rgbstd::interface::{
+    ContractIface, FungibleAllocation, Iface, IfaceClass, IfaceId, OutpointFilter,
+};
 use rgbstd::invoice::{Amount, Precision};
 use rgbstd::persistence::ContractStateRead;
 use rgbstd::stl::{rgb_contract_stl, ContractTerms, Details, Name};
@@ -130,6 +132,15 @@ impl<S: ContractStateRead> Rgb25<S> {
         Precision::from_strict_val_unchecked(strict_val)
     }
 
+    pub fn allocations<'c>(
+        &'c self,
+        filter: impl OutpointFilter + 'c,
+    ) -> impl Iterator<Item = FungibleAllocation> + 'c {
+        self.0
+            .fungible("assetOwner", filter)
+            .expect("RGB25 interface requires `assetOwner` state")
+    }
+
     pub fn total_issued_supply(&self) -> Amount {
         self.0
             .global("issuedSupply")