Integrating a new payment gateway.


Since last week I'm trying to integrate a new payment gateway into CS-Cart, unfortunately unsuccessful. I have the code sent from the payment gateway provider and everything seems to be fine with it. What I need is a proper, full integration guide (step by step, where should I place the code, how to create a return url etc.) and if some of you experienced this kind of issue and found a solution please share it. I've read this article CS-Cart Documentation — CS-Cart 4.15.x documentation and did not help me.

P.S. Examples will be much appreciated.