I’m going to use the Paypal payment plugin and I extended it successfully to add the Paypal fees to the total paid by participants (configurable by admins). During the test phase I got a problem on the payment flow and I try to explain:
after the payment on Paypal, and returning to the merchant page (indico…) if paypal didn’t yet did the POST to finalize the transaction (file controllers.py, class RHPaypalIPN, method _process) where at last there is the call to register_transaction, user browser is redirected to the payment page (same file, class RHPaypalSuccess, method _process) showing the flash message and below the payment not done yet which is confusing. Reloading the page after the POST from Paypal, obviously prints out a “green” page all ok, payment done.
I think that the right solution should be that the RHPaypalSuccess/_process() should check periodically (maybe until a timeout) if the transaction it’s effectively registered before sending the last redirect, so after the execution of the RHPaypalIPN/_process(), but I was unable (my fault surely) to inspect the transaction registration, always I got “None” when checking self.registration.transaction.
The hyper strange to me thing it’s that if Paypal POST it’s superfast and the transaction got registered before my browser execute the redirect, the value of self.registration.transaction contains the right data.
Where I’m wrong ?
I would like to share our improvements on this plugin with the community when the test phase end ok.