--- Comment #28 from Luciano Santos email@example.com --- I've tested here on my Tumbleweed system, using a dummy package to echo output messages. It's working for transfiletriggerin but, sadly, it gets invoked way too frequently IMO.
In a DUP transaction with 377 updates, transfiletriggerin got invoked around 76 times. And transfiletriggerpostun still no joy.
$ rpm -q rpm rpm-220.127.116.11-2.1.x86_64