Hello , can someone explain how local bot api works

.. does it require a custom tg client ? to be used by bot users ?

no, it doesn't need anything from users

The local bot api is basically a custom tg client that hosts the http API locally.

this is lil confusing , ain't we supposed to send request to an official tg server ... then that server will send that update to all it's cllient ( ei : my account ) , ... well is my local bot api supposed to get updates from all tg users also ?

It's the same piece of software that Telegram uses for the public http api

it will send requests to tg server in the end anyway

https://github.com/tdlib/telegram-bot-api/issues/2#issuecomment-722388026

so api.telegram.org was a medium between tg server and tg bots right ?

Yes

Thanks very much !!

Why a medium betwenn two application is needed 😅 , why not just send directly to it ?

Because that "medium" is what makes your account different from a bot account.

What's the medium exactly here?

Bot API server.

Technically, you can. But working with JSON and API endpoints is much easier than with TypeLanguage requests

ah , make sense