How to make a new payment module?

[napster]

Hello

I'm new at Zen Cart. I want to make a new simple payment module for a new gateway.

This module needs these items for request:
$amount, $callBackUrl

and these ones for verify:
$amount

Where can i find a toturial for it?

[kobra]

I do not believe that a tutorial specific to this exists
There is quite a bit of programming/flow in the wiki

You might be best off selecting one of the written payment modules that most closely matches the requirements you are being given to see how these things are handled.

As payment is a very sensitive function you will want to insure that what ever you write does not provide a security breech that could be exploited