feat(core): add cslUtil.bytewiseEquals

packages/core/src/CSL/util.ts

@@ -2,3 +2,12 @@ import { CardanoSerializationLib } from './loadCardanoSerializationLib';
 
 export const MAX_U64 = 18_446_744_073_709_551_615n;
 export const maxBigNum = (csl: CardanoSerializationLib) => csl.BigNum.from_str(MAX_U64.toString());
+
+export type CslObject = { to_bytes: () => Uint8Array };
+export const bytewiseEquals = (obj1: CslObject, obj2: CslObject) => {
+  if (obj1 === obj2) return true;
+  const obj1Bytes = obj1.to_bytes();
+  const obj2Bytes = obj2.to_bytes();
+  if (obj1Bytes.length !== obj2Bytes.length) return false;
+  return obj1Bytes.every((byte, idx) => obj2Bytes[idx] === byte);
+};

packages/core/test/CSL/util.test.ts

@@ -0,0 +1,25 @@
+import { cslUtil } from '../../src';
+
+describe('cslUtil', () => {
+  describe('bytewiseEquals', () => {
+    it('same bytes => true', () => {
+      expect(
+        cslUtil.bytewiseEquals({ to_bytes: () => new Uint8Array([1, 2]) }, { to_bytes: () => new Uint8Array([1, 2]) })
+      ).toBe(true);
+    });
+
+    describe('false', () => {
+      it('different lengths => false', () => {
+        expect(
+          cslUtil.bytewiseEquals({ to_bytes: () => new Uint8Array([1, 2]) }, { to_bytes: () => new Uint8Array([1]) })
+        ).toBe(false);
+      });
+
+      it('different byte => false', () => {
+        expect(
+          cslUtil.bytewiseEquals({ to_bytes: () => new Uint8Array([1, 2]) }, { to_bytes: () => new Uint8Array([1, 3]) })
+        ).toBe(false);
+      });
+    });
+  });
+});