eventespresso / event-espresso-core

        $notify_url = null,

        $cancel_url = null

    ) {

        if (! $payment instanceof EEI_Payment) {

            $payment->set_gateway_response(

                esc_html__(

                    'Error. No associated payment was found.',

                    'event_espresso'

                )

            );

            $payment->set_status($this->_pay_model->failed_status());

            return $payment;

        }

        $transaction = $payment->transaction();

        if (! $transaction instanceof EEI_Transaction) {

            $payment->set_gateway_response(

            return $payment;

        }

        $transaction = $payment->transaction();

        if (! $transaction instanceof EEI_Transaction) {

            $payment->set_gateway_response(

                esc_html__(

                    'Could not process this payment because it has no associated transaction.',

                    'event_espresso'

                )

            );

            $payment->set_status($this->_pay_model->failed_status());

            return $payment;

        }

        $order_description = mb_strcut($this->_format_order_description($payment), 0, 127);

        $primary_registration = $transaction->primary_registration();

        $primary_attendee = $primary_registration instanceof EE_Registration

        if ($payment instanceof EEI_Payment) {

            $this->log(array('Return from Authorization' => $update_info), $payment);

            $transaction = $payment->transaction();

            if (! $transaction instanceof EEI_Transaction) {

                $payment->set_gateway_response(

                    esc_html__(

                        'Could not process this payment because it has no associated transaction.',

                        'event_espresso'

                    )

                );

                $payment->set_status($this->_pay_model->failed_status());

                return $payment;

            }

            $primary_registrant = $transaction->primary_registration();

            $payment_details = $payment->details();

            // Check if we still have the token.