Hey there, thanks for the article! I have one issue with that, why do the messages end up duplicated with different sender IDs: one with the actual sender and the other is with the participant?
Ok, I figured this out, there's an error in the code. The message creation code should belong in the receive method rather than chat_message. Otherwise the same message is created for each chat participant with the sender always being the recipient. Took me some time to figure this out, hope it helps someone else.