feat(core): add isBabbageOutput method to TransactionOutput class

Author: AngelCastilloB

packages/core/src/Serialization/TransactionBody/TransactionOutput.ts

@@ -304,6 +304,16 @@ export class TransactionOutput {
     this.#scriptRef = script;
   }
 
+  /**
+   * Checks if the output is formatted as legacy array or babbage map.
+   *
+   * @returns true if the output is babbage format, false otherwise.
+   */
+  isBabbageOutput(): boolean {
+    const reader = new CborReader(this.toCbor());
+    return reader.peekState() === CborReaderState.StartMap;
+  }
+
   /**
    * Gets the size of the serialized map.
    *

packages/core/test/Serialization/TransactionBody/TransactionOutput.test.ts

@@ -396,5 +396,14 @@ describe('TransactionOutput', () => {
         expect(output.toCore()).toEqual(basicOutput);
       });
     });
+
+    describe('isBabbageOutput', () => {
+      it('cant distinguish a babbage output from a legacy output', () => {
+        const babbageOut = TransactionOutput.fromCbor(babbageAllFieldsCbor);
+        const legacyOutput = TransactionOutput.fromCbor(legacyOutputNoDatumCbor);
+        expect(babbageOut.isBabbageOutput()).toBe(true);
+        expect(legacyOutput.isBabbageOutput()).toBe(false);
+      });
+    });
   });
 });