I'm trialling Cart66 Lite, with the hope of using the full version in an upcoming website. We want to use it for registrations, such that when a user pays for an event or course, we submit an entry to the enrollment database with the product ID and username on successful payment.
What I'm trying to look for is a way to hook into the checkout/fulfillment process to update the database with this information. We plan to use Paypal express and authorize.net. Getting the logged in username is easy enough, I will also need to product id of the item payed for, and some indication that the transaction was successful.
I'm thinking that the receipt page might be the best spot, but just wondering if anyone else has experience with something similar to point me in the right direction.