We own a payment gateway, and have demand for Zen Cart plugin to allow those customers to use our gateway.
The Gateway accepts HTTPS POST of payment data, and replies to the Zen Cart site url with the result. Variables returned include orderno, payment id for each order
The plugins will need to accommodate 2 merchant types of deployment, our method #1 and Method #3
See details: [url removed, login to view]
The plugins will be made available to the public with support from us or by yourself directly
Documents are available for the Payment Gateway requirements