Add hashPersonalMessage method

web3p · Aug 17, 2018 · fbe03f0 · fbe03f0
1 parent ceb622c
commit fbe03f0
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Showing 2 changed files with 25 additions and 0 deletions.
diff --git a/src/Util.php b/src/Util.php
@@ -234,4 +234,16 @@ public function ecsign(string $privateKey, string $message)
 
         return $signature;
     }
+
+    /**
+     * hasPersonalMessage
+     * 
+     * @param string $message
+     * @return string
+     */
+    public function hashPersonalMessage(string $message)
+    {
+        $prefix = sprintf("\x19Ethereum Signed Message:\n%d", mb_strlen($message));
+        return $this->sha3($prefix . $message);
+    }
 }
diff --git a/test/unit/UtilTest.php b/test/unit/UtilTest.php
@@ -114,4 +114,17 @@ public function testEcsign()
         $this->assertEquals('67cbe9d8997f761aecb703304b3800ccf555c9f3dc64214b297fb1966a3b6d83', $signature->s->toString(16));
         $this->assertEquals(35, $signature->recoveryParam);
     }
+
+    /**
+     * testHashPersonalMessage
+     * 
+     * @return void
+     */
+    public function testHashPersonalMessage()
+    {
+        $util = new Util;
+        $hashedMessage = $util->hashPersonalMessage('Hello world');
+
+        $this->assertEquals('8144a6fa26be252b86456491fbcd43c1de7e022241845ffea1c3df066f7cfede', $hashedMessage);
+    }
 }