Inspired by Drupal’s philosophy of contributing code and modules for the community, we have released a module that provides ePayment support in Drupal Commerce. Available here.

Just install the module, configure standard ePayment parameters and you’re ready to process payments. You can also set a debug mode for the IPN confirmations and switch between production and test mode from the Drupal admin, very handy for a Drupal live site.

Feel free to extend it and contribute some more to the Drupal community.