public function hookPayment($params)
    {
        global $smarty;

        $currency = new Currency(intval($params['cart']->id_currency));
        $smarty->assign(array(
            'sid' => Configuration::get('RBKMONEY_SITE_ID'),
            'amount' => number_format((float)($params['cart']->getOrderTotal(true, Cart::BOTH)), 2, '.',''),
            'currency' => $currency->iso_code == 'RUB' ? 'RUR' : $currency->iso_code,
            'orderid' => (int)$params['cart']->id,
            'this_path' => $this->_path
        ));

        return $this->display(__FILE__, 'payment.tpl');
    }

'orderid' => (int)$params['cart']->id

'orderid' => (int)$params['order']->id