How to get a list of all messages in a Telegram group via Bot API?

Question

API

There is a bot in Telegram, what query can be used to get a list of all messages in a group or channel?
As I understand it, requests of the form:
https://api.telegram.org/bot_token/getUpdates?chat...
Allow you to get only updates, but how to get the full list of posts using only the Bot API?

Answer 1

You need to connect the bot to the channel and remove privacy. It will see all new messages in the channel. Or is it worth the task to read the old ones? The old ones don't seem to work.