I was going to do such a thing, when my company had decided to switch to teams (I currently develop localslackirc, IRC-slack gateway). However in the end my bo

I was going to do such a thing, when my company had decided to switch to teams (I currently develop localslackirc, IRC-slack gateway). However in the end my boss didn't like teams and decided to pay up for slack, so we remained on slack and I never needed it. I had begun to investigate the protocol. At the time it seemed to be doing polling to the server rather than using a websocket. It could be that trick to make requests with a long timeout, and make them hang if there are no new messages. Besides that I don't know anything.