performance and optimization

src/utils/hash.utils.spec.ts

@@ -0,0 +1,15 @@
+import * as crypto from 'crypto';
+
+import { hash256 } from './hash.utils';
+
+describe('hash256', () => {
+    it('matches native double sha256 for known input', () => {
+        const data = Buffer.from('public-pool-share-validation', 'utf8');
+        const expected = crypto
+            .createHash('sha256')
+            .update(crypto.createHash('sha256').update(data).digest())
+            .digest('hex');
+
+        expect(hash256(data).toString('hex')).toBe(expected);
+    });
+});