fix replace

src/SenangPayDriver.php

@@ -89,7 +89,8 @@ class SenangPayDriver implements PaymentGatewayDriver
     public function computeHash($payload)
     {
         $query = http_build_query($payload);
-        $query = preg_replace('/(^|&)hash=[^&]*($|&)/','$1hash=[HASH]$2', $query);
+        $key = preg_quote(http_build_query([$this->keyMap['hash']=>'']), '/');
+        $query = preg_replace('/(^|&)'.$key.'[^&]*($|&)/','$1hash=[HASH]$2', $query);
         return md5($this->secret_key . '?' . $query);
     }
 }