/**
* @return string
*/
public function process_button()
{
$sid = zen_session_name() . '=' . zen_session_id();
$formEntries = $this->buildStandardTransactionDetails();
$formEntries['SuccessURL'] = str_replace('&', '&', zen_href_link(FILENAME_CHECKOUT_PROCESS, $sid, 'SSL', false));
$formEntries['FailureURL'] = str_replace('&', '&', zen_href_link(FILENAME_CHECKOUT_PROCESS, $sid, 'SSL', false));
$processButtonString = SagepayUtil::processCryptEntries($formEntries);
$crypt = SagepayUtil::encryptAndEncode($processButtonString, MODULE_PAYMENT_SAGEPAY_ZC_FORM_PASSWORD);
$transaction_type = strtoupper(MODULE_PAYMENT_SAGEPAY_ZC_FORM_TXTYPE);
$this->errorLog(array(array('title' => 'Transaction Type', 'content' => $transaction_type), array('title' => 'Submit Data', 'content' => $processButtonString)));
$process_button_string = zen_draw_hidden_field('VPSProtocol', self::SP_PROTOCOL_VERSION) . zen_draw_hidden_field('TxType', $transaction_type) . zen_draw_hidden_field('Vendor', MODULE_PAYMENT_SAGEPAY_ZC_FORM_VENDOR_NAME) . zen_draw_hidden_field('ReferrerID', 'BB5F9F0D-8982-4203-AFD4-AF78017E4B92') . zen_draw_hidden_field('Crypt', $crypt);
return $process_button_string;
}
