strangerstudios/paid-memberships-pro — pull request #28 by zookatron (2012-10-28 21:28:11+00:00)
Title: added hook to Authorize.net silent post

Hi Jason,
I was hoping you'd be open to the idea of adding a hook to the Authorize.net silent post script so that you can extend it a bit without hacking the plugin. In my case I needed to add some functionality to detect refunded charges and set the orders status to "refunded" when it gets the notification, but I think having a general hook here would be good.