I am interested in it, but I am not good at reversing thing, so far I only figured out how to read the data of current hand and the hint. I am still finding out how do you play a card and send the chi/pon/kan/riichi/ron message
Every round is like 40 mins so i think it might be better to leave it for bot
In my opinion, there are two ways to make this bot
Difficult way is to make a mahjong AI bot. There are many open source mahjong solvers on github with high winrate.
Easy way is just follow the ingame hint and thats it.