mapdev\FacebookMessenger\Messenger::hubReply PHP Метод

    public function hubReply(array $data, $verify_token)
    {
        //change to request data array
        if (array_key_exists('hub_mode', $data) && $data['hub_mode'] == 'subscribe' && $data['hub_verify_token'] == $verify_token) {
            return new Psr7\Response(200, null, $data['hub_challenge']);
        }
        return new Psr7\Response(400, null, 'No Valid Challenge');
    }