add keccak256 mock

assembly/__tests__/vm-mock.spec.ts

@@ -6,6 +6,7 @@ import {
   sha256,
   getKeysOf,
   validateAddress,
+  keccak256,
 } from '../std';
 import { changeCallStack, resetStorage } from '../vm-mock/storage';
 import {
@@ -106,6 +107,30 @@ describe('Testing mocked Storage and CallStack', () => {
     );
   });
 
+  test('Testing keccak256', () => {
+    function staticArrayToHexString(arr: StaticArray<u8>): string {
+      let result = '';
+      for (let i = 0; i < arr.length; i++) {
+        let hexValue = arr[i].toString(16).padStart(2, '0'); // Convert to hex and pad with zero if needed
+        result += hexValue;
+      }
+      return result;
+    }
+
+    const result = keccak256(
+      stringToBytes('The quick brown fox jumps over the lazy dog'),
+    );
+    expect(result).toStrictEqual([
+      77, 116, 27, 111, 30, 178, 156, 178, 169, 185, 145, 28, 130, 245, 111,
+      168, 215, 59, 4, 149, 157, 61, 157, 34, 40, 149, 223, 108, 11, 40, 170,
+      21,
+    ]);
+
+    expect(staticArrayToHexString(result)).toBe(
+      '4d741b6f1eb29cb2a9b9911c82f56fa8d73b04959d3d9d222895df6c0b28aa15',
+    );
+  });
+
   test('Testing getKeysOf', () => {
     Storage.setOf(testAddress, keyTest, valueTest);
     Storage.setOf(testAddress, 'test2', valueTest);

package.json

@@ -37,6 +37,7 @@
     "@massalabs/as-types": "^1.0.0",
     "@massalabs/eslint-config": "^0.0.8",
     "@massalabs/prettier-config-as": "^0.0.2",
+    "js-sha3": "^0.9.2",
     "as-bignum": "^0.2.40",
     "husky": "^8.0.2",
     "lint-staged": "^13.0.3",

vm-mock/vm.js

@@ -1,4 +1,5 @@
 const { createHash } = await import('node:crypto');
+import  sha3  from 'js-sha3';
 
 /**
  * Addresses and callstack
@@ -744,6 +745,12 @@ export default function createMockedABI(
         return newString(generateRandOpId()
         );
       },
+
+      assembly_script_keccak256_hash(dataPtr) {
+        const data = getArrayBuffer(dataPtr);
+        const hash =  sha3.keccak256.arrayBuffer(data);
+        return newArrayBuffer(hash);
+      },
     },
   };