A simple Python script using Telethon to log all (or some) messages a user or bot account can see on Telegram.

• Python 3.6 or newer
• Python package dependencies: poetry install or pip install -r requirements.txt
• A Telegram user or bot account

Set your api_id and api_hash in config.toml. You can get this from "API development tools" on https://my.telegram.org/. Note that this authenticates an app, not a user.

When you start the script for the first time, you will be prompted for credentials. Upon successful authentication, it will start logging all messages it can see to stdout.

You can set enabled_chats and disabled_chats in the config to a list of chat IDs to control which chats should be logged (the default is all).