feat: add helper method to Abi Interface (#1123)

.changeset/late-apples-behave.md

@@ -0,0 +1,5 @@
+---
+"@fuel-ts/abi-coder": patch
+---
+
+feat: add helper method "getTypeById" to Abi Interface

packages/abi-coder/src/interface.ts

@@ -120,4 +120,14 @@ export class Interface<TAbi extends JsonAbi = JsonAbi> {
 
     return AbiCoder.encode(this.jsonAbi, configurable.configurableType, value);
   }
+
+  getTypeById(typeId: number) {
+    return findOrThrow(
+      this.jsonAbi.types,
+      (t) => t.typeId === typeId,
+      () => {
+        throw new Error(`type with typeId '${typeId}' doesn't exist`);
+      }
+    );
+  }
 }

packages/abi-coder/test/interface.test.ts

@@ -774,4 +774,19 @@ describe('Abi interface', () => {
       });
     });
   });
+
+  describe('abi types', () => {
+    it('should return the correct type when it exists', () => {
+      const abiType = exhaustiveExamplesInterface.getTypeById(22);
+      expect(abiType.type).toEqual('enum EnumWithStructs');
+      expect(abiType.components).toBeDefined();
+      expect(abiType.typeParameters).toBeNull();
+    });
+
+    it('should throw an error when type does not exist', () => {
+      expect(() => exhaustiveExamplesInterface.getTypeById(999)).toThrowError(
+        "type with typeId '999' doesn't exist"
+      );
+    });
+  });
 });