How to accept recurring payments in a subscription site?

[eluser]Kevin Smith[/eluser]
Hey CI folks,

Forgive me for asking something that's probably been asked before, but I'm fairly new, and I can't find the answer. It doesn't appear that there's a library or anything pre-made for handling recurring payments, so I'm assuming that most of you roll your own if you need it. I'm working on developing an application with a friend in our spare time, and I'm using this time to learn CI since we don't really have a deadline. Can anyone help point me in the right direction for putting the pieces together to roll my own subscription-based membership? I'm already using DX_Auth with good results to get the membership part of the site together, but I'm not sure how to integrate recurring payments.

Thanks in advance for any help that might be offered!