Telegram Captcha Bot

Telegram bot that validates new users that enter supergroup. Validation works like a simple captcha. Bot written in Go (Golang).

This bot has been tested on several supergroups (2000+ people) for a long time and has shown its effectiveness against spammers.

Difference to the original https://github.com/mxssl/tg-captcha-bot

• Added support for showing @username in welcome message.

How it works

1. Add the bot to your supergroup
2. Promote the bot for administrator privileges
3. A new user enters your supergroup
4. Bot restricts the user's ability to send messages
5. Bot shows a welcome message and a captcha button to the user
6. If the user doesn't press the button within 30 seconds then the user is banned by the bot

If you want to run your own instance of the bot

• Option 1 (the easiest one): docker-compose + already built docker container
• Option 2: docker-compose + build your own docker container

Commands

/healthz - check that the bot is working correctly

Сustomization

You can change several bot's settings (welcome message, ban duration, socks5 proxy server, marking welcome message with Username new user if it exist) through the configuration file config.toml

Contacts

If you have questions feel free to ask me in TG @mxssl