I'm looking to use my own class to generate a unique receipt number (can't use entry ID or anything built in to GF because the format must match the format of our internal POS).
Can't seem to find any hooks or filters documented specific to the PayPal Pro beta add-on.
Couple things I need hooks for:
1. I need to generate my receipt number after the person clicks submit on the GF form, but before info is sent to PayPal PRO because I need to pass this receipt number to PayPal along with the payment authorization request.
2. I then need to update the receipt number as used/not used based on the PayPal response.
I may be able to use existing hooks native to the GF core if you guys could give me some indication of when the PayPal PRO stuff executes relative to the core hooks.
Thanks :-)