Reply To: Custom Payment Gateway Plugin

I don’t know E-xact at all, but that tutorial doesn’t seem to be about an payment button but a credit card inquiry? You can’t use the gateway function with random services or API’s, it has to be a gateway. That means they accept information’s from a form (that’s what you generate) and processes the whole payment including entering credit card details. For your service you’d need to add a form and ask for credit card details yourself and that’s not covered by easyreservations gateway function.
Regards