public function getUniqueRequestId()
    {
        $cookies_str = '';
        foreach ($_COOKIE as $key => $val) {
            if (strpos($key, $this->getKey()) !== false) {
                $cookies_str .= $key . json_encode($val);
            }
        }

        return md5($cookies_str . $this->getKey() . json_encode($this->getInput()));
    }