public function getValidationFailureMessage()
    {
        $requestPayment = $this->getRequestOrderPayment();
        $orderPayment = $this->getOrderPayment();

        $currencyPayPal = $requestPayment->getCurrency();
        $pricePayPal = $requestPayment->getAmount();

        $currencyPayment = $orderPayment->getCurrency();
        $amountPayment = $orderPayment->getAmount();

        $lang = $this->getLang();
        $validationMessage = $lang->translateString('OEPAYPAL_PAYMENT_INFORMATION') . ': ' . $amountPayment . ' ' . $currencyPayment . '. ' . $lang->translateString('OEPAYPAL_INFORMATION') . ': ' . $pricePayPal . ' ' . $currencyPayPal . '.';

        return $validationMessage;
    }