There's no rollback, it's an atomic transaction. The certainty that messages are...

		hn_urbit_thr123 on March 2, 2023 \| parent \| context \| favorite \| on: You cannot have exactly-once delivery (2015) There's no rollback, it's an atomic transaction. The certainty that messages are always handled completely or fail completely is one of the big design constraints that made the whole thing so hinky.