protected function getBaseData()
    {
        $data = array();
        $data['xKey'] = $this->getCardknoxKey();
        $data['xVersion'] = '4.5.4';
        $data['xSoftwareName'] = 'omnipay';
        $data['xSoftwareVersion'] = '1';
        $data['xCommand'] = $this->action;
       
        return $data;
    }