Add starknet keccak

web3p · Jul 8, 2024 · 52d73fe · 52d73fe
1 parent ab393fd
commit 52d73fe
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Showing 2 changed files with 25 additions and 0 deletions.
diff --git a/src/Utils.php b/src/Utils.php
@@ -262,4 +262,15 @@ public static function hexToNumber($hexNumber)
  }
  return intval(self::toBn($hexNumber)->toString());
  }
+
+ /**
+ * keccak
+ * 
+ * @param string $value
+ * @return string
+ */
+ public static function keccak($value)
+ {
+ return self::toBn(self::sha3($value))->bitwise_and(Constants::MASK_250())->toHex();
+ }
 }
diff --git a/test/unit/UtilsTest.php b/test/unit/UtilsTest.php
@@ -7,6 +7,7 @@
 use Test\TestCase;
 use phpseclib\Math\BigInteger as BigNumber;
 use StarkNet\Utils;
+use StarkNet\Constants;
 
 class UtilsTest extends TestCase
 {
@@ -250,4 +251,17 @@ public function testToBn()
  $this->expectException(InvalidArgumentException::class);
  $bn = Utils::toBn(new stdClass);
  }
+
+ /**
+ * testKeccak
+ * 
+ * @return void
+ */
+ public function testKeccak()
+ {
+ $result = Utils::keccak('hello');
+ $this->assertEquals('8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8', $result);
+ $bn = Utils::toBn($result);
+ $this->assertTrue($bn->compare(Constants::MASK_250()) < 0);
+ }
 }