Hi:
My church wants to utilize the event booking but needs to integrate there credit card system. So they want to connect to there merchant account. The merchant account gave me a link,how can I place there link on the event booking page?
They would place in the credit card number and then click pay or submit and it would go to the merchant account and then back and register inside the event booking list as a registrant.
In this case, you will need to write a payment plugin. It seems this payment plugins works much the same with Paypal, so you can have a look at the os_paypal.php and os_paypal.xml as a sample of the payment plugin.
The code of the payment plugin is clear written, so I hope you take that plugin as a sample and can write your own payment plugin .