Is there any event for bot that I can use every time it is added?

Ok...I think I found out y. Well..that cache could be an issue as well..However, one thing I noticed that.... even if you uninstalled the bot, the chat bot still is there under Chat section. So...if you ever blocked it for whatever reason testing, then...when you resinstalled the app, the event won't be triggered because that bot was basically blocked. So...you have to make sure that the bot under Chat should be unblocked. Ok. here is a question. I don't see there is a delete option under Chat...or uninstall...there is hide, but I don't think that would work..I guess that is just UI thing... Is there any way to make a sort of automatic way that I can unblock the bot whenever I uninstalled the app? Obviously, I could create new bot(new guid), but that is not my option at this point.
Thanks,