How to add a countdown to the bot?

Question

Python

I need the bot to answer ready when the /go command is pressed for the first time, but when this command is pressed again, it writes how much time is left (counting 3 hours from the first press), for example (2 hours 59 minutes left). When 3 hours have passed and press the /go command, it will write again ready and start counting 3 hours.
Do you need to connect the database for this or is it possible to do it simply in the code?

Answer 1

You can use the state machine of the aiogram library itself. Lots of educational material. The question is where to store these states. There is the easiest way - in RAM, but when you restart the bot, everything will be erased.
If you do not want to bother much, then IMHO the easiest way is a database. Time in UNIX format comes in the message object itself, and you should be tied to it.