That's quite a PR, nice work! I'll have a look at this once we have 1.3.2 released. Would you mind writing some documentation for this as well? IIRC transactions are currently not explained at all in the docs.

Code LGTM. An example of how to use in the docs would be great. While you're at it, maybe we can also add an extra example of how Events work?

@Jud ping for docs :-)

@bjornpost re: the docs, they are relatively unchanged. IMO this just makes the existing transaction code work like a casual observer would expect them to. I'll open another issue for cleaning up event docs.

Edit: btw, we've been running this code in production since ~2015. May be some corner cases we're not running into, but generally works as expected.