This was already the intended behavior, but in Python a return inside
of a try...finally does not behave this way. From the Python
documentation [1]:
When a return, break or continue statement is executed in the try
suite of a try...finally statement, the finally clause is also
executed ‘on the way out.’
This can cause issues because some payment acquirers will return an
error when refunding a pending transaction. This puts the transaction
in the 'error' state which means it won't be refunded anymore.
Additionally, putting s2s_do_transaction in a try...except like this
hides any traceback that occurs which makes troubleshooting harder.
[1] https://docs.python.org/3/reference/compound_stmts.html#finally
Joren Van Onder
e94912b9a9