...
For information on how a developer can contribute to this codebase, see https://github.com/dimagi/commcare-hq/blob/master/CONTRIBUTING.rst .
Please note that Dimagi (the makers of CommCare) does offer the service of creating custom gateway integrations. If you have a specific question about your legacy contract or gateway with Dimagi, please reach out to the Dimagi Support team at support@dimagi.com.
How to Set Up your Connection
...