Add computeAddress

src/Hash.php

@@ -0,0 +1,59 @@
+<?php
+/**
+ * This file is part of starknet.php package.
+ * 
+ * (c) Kuan-Cheng,Lai <[email protected]>
+ * 
+ * @author Peter Lai <[email protected]>
+ * @license MIT
+ */
+
+namespace StarkNet;
+
+use BN\BN;
+use StarkNet\Utils;
+use StarkNet\Crypto\FastPedersenHash;
+
+class Hash
+{
+ const CONTRACT_ADDRESS_PREFIX = '523065374597054866729014270389667305596563390979550329787219';
+
+ public static function L2_ADDRESS_UPPER_BOUND()
+ {
+ // 2**251 - 256
+ return new BN('3618502788666131106986593281521497120414687020801267626233049500247285300992');
+ }
+
+ /**
+ * getSelectorFromName
+ * 
+ * @param string $name
+ * @return string
+ */
+ public static function getSelectorFromName($name)
+ {
+ return Utils::keccak($name);
+ }
+
+ /**
+ * computeAddress
+ * 
+ * @param mixed $classHash
+ * @param mixed $constructorData
+ * @param mixed $salt
+ * @param mixed $deployerAddress
+ * @return string
+ */
+ public static function computeAddress($classHash, $constructorData, $salt, $deployerAddress = 0)
+ {
+ $constructorDataHash = FastPedersenHash::computeHashOnElements($constructorData);
+ $rawAddress = FastPedersenHash::computeHashOnElements([
+ self::CONTRACT_ADDRESS_PREFIX,
+ $deployerAddress,
+ $salt,
+ $classHash,
+ $constructorDataHash
+ ]);
+ return Utils::removeLeadingZero($rawAddress->mod(self::L2_ADDRESS_UPPER_BOUND())->toString(16));
+ }
+}

src/Utils.php

@@ -122,6 +122,20 @@ public static function stripZeroPrefix($value)
  return $value;
  }
 
+ /**
+ * removeLeadingZero
+ * 
+ * @param string $value
+ * @return string
+ */
+ public static function removeLeadingZero($value)
+ {
+ if (!is_string($value)) {
+ throw new InvalidArgumentException('The value to removeLeadingZero function must be string.');
+ }
+ return preg_replace('/^0+/', '', $value);
+ }
+
  /**
  * isNegative
  * 

test/unit/HashTest.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace Test\Unit;
+
+use InvalidArgumentException;
+use stdClass;
+use Test\TestCase;
+use phpseclib\Math\BigInteger as BigNumber;
+use StarkNet\Hash;
+
+class HashTest extends TestCase
+{
+ /**
+ * setUp
+ * 
+ * @return void
+ */
+ // public function setUp(): void
+ // {
+ // parent::setUp();
+ // }
+
+ /**
+ * testComputeAddress
+ * 
+ * @return void
+ */
+ public function testComputeAddress()
+ {
+ $result = Hash::computeAddress(
+ '951442054899045155353616354734460058868858519055082696003992725251069061570',
+ [
+ 21,
+ 37
+ ],
+ 1111
+ );
+ $this->assertEquals('30018328ec720e778744bfeec50d93bad01215f53b7a09e7c8b724157c2d947', $result);
+
+ $result = Hash::computeAddress(
+ '951442054899045155353616354734460058868858519055082696003992725251069061570',
+ [
+ 21,
+ 37
+ ],
+ 1111,
+ 1234
+ );
+ $this->assertEquals('707c2720b9dc5fb42ff24eeef04ddff509fcf2f86371cbf9a344de8638bd4a8', $result);
+ }
+}

test/unit/UtilsTest.php

@@ -106,6 +106,20 @@ public function testIsZeroPrefixed()
  $isPrefixed = Utils::isZeroPrefixed(new stdClass);
  }
 
+ /**
+ * testRemoveLeadingZero
+ * 
+ * @return void
+ */
+ public function testRemoveLeadingZero()
+ {
+ $result = Utils::removeLeadingZero('01234');
+ $this->assertEquals('1234', $result);
+
+ $this->expectException(InvalidArgumentException::class);
+ $result = Utils::removeLeadingZero(new stdClass);
+ }
+
  /**
  * testStripZeroPrefix
  *