protected function getAction()
    {
        $action    = self::CAPTURE_ACTION;
        $request   = $this->getRequest();
        $rawAmount = $request->getRequestParameter(self::MC_GROSS);
        $status    = $request->getRequestParameter(self::PAYPAL_PAYMENT_STATUS);

        if ((0 > $rawAmount) && (self::PAYPAL_STATUS_REFUND_DONE == $status)) {
            $action = self::REFUND_ACTION;
        }

        return $action;
    }