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Telegram-CAPTCHA-bot

简体中文

A bot running on Telegram which will send CAPTCHA to verify if the new member is a human.

Getting Started

Prerequisites

You need Python 3.7+ Environment and Telethon 1.7.1. If the bot needs to run under a SOCKS5 proxy, please install PySocks as well.

Besides, some tokens are also required. They include bot token from @BotFather, api_id and api_hash from Telegram official website

If api_id and api_hash are missing, this archive branch can be an alternative which uses Python 3.6+ and python-telegram-bot 的 instead of Telethon. A bot token is still required. Note that the rights available in the function restrictChatMember provided by python-telegram-bot does not match the choices when a human is restricting someone, so this alternative branch won't restore the rights to its original state (before the new member joined the group). This may be exploited by anyone who is formerly restricted, just rejoin the group then pass the challenge and they will be free from any restriction.

Installing and Running

pip3 install telethon PySocks --upgrade
git clone https://github.com/lziad/Telegram-CAPTCHA-bot 
cd Telegram-CAPTCHA-bot
cp config.example.js config.json

Then edit config.json as your wish. Don't forget to fill in token, api_id and api_hash and delete all the comment lines. Finally just run main.py, for example

nohup python3 main.py &

Notes

  • Telethon send request directly to the Telegram servers, and the position of the data centers depends on your Telegram account used to request for api_id. Try to place the bot on a server in the same country as the Telegram DC in order to maximize the responding speed. You may refer to the official document for more information.
  • Some spambots are able to click buttons. If your group is suffering a lot of those bots, consider changing challenge_strict_mode to true in config.json. Then the newbies need to answer the challenge correctly to have their restrictions lifted. The actions after timeout still depend on challenge_timeout_action.

License

This project is licensed under the MIT License - see the LICENSE.md file for details.

Acknowledgments

  • The convenient APIs of Telegram
  • The persistent spambots on Telegram - if they disappear then this project will be discarded as well