to a particular chat_id, WITHOUT sending that message?
It took me 15 minutes to dig both bot and mtproto api. So here is the best solution i was able to find: getChat on a user who blocked a bot won't return his profilepic. This is a bad way to check if you can send a message to a user yet you can try to rely on it in some cases There's also a second idea: using this mtproto method. It should return a chat object, and if it is an instance of chatForbidden you will not be able to send a message That's the best I could find. Sorry :(
Wow, thx for your time. Is there a difference between user blocked a bot and user stopped a bot? Cause stopping + registering the ones who “started” would be sufficient. My best idea was to try sending a message silently + deleting it in case it went through. Should go unnoticed + give the info needed.
stopped actually means blocked
Use /getChatMember with chat id of bot and check its status.
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