This bot creates a bridge between a Telegram group and an IRC channel. Everything posted in the Telegram group will be send to the IRC. Photos, files etc. gets downloaded and a link is posted in the IRC (max 20MB, data gets deleted after several hours). Users in the irc have to put a leading "!t" to their messages to send them to the group. Sometimes you want to send a message or file to the irc, but you don't want to disturb the whole group. There is a solution! Create a group with the bot and do the normal registration. If there is already a primary bridge the bot asks you if you want to create a secondary bridge. The secondary bridge is one-way only. Everything you send to the Telegram group gets posted in the IRC but nothing gets from the IRC to the group, only to the primary group.

Make sure the webserver only delivers the files as application/octet-stream or something similar. Otherwise, the worst case scenario is that an attacker can execute code on the webserver by e.g. uploading php files that the webserver executes.

• Pillow (PIL for python3)
• irc3
• python-telegram-bot
• sqlite3

• Telegram Bot API key. Please visit https://core.telegram.org/bots#6-botfather
• Webserver to make downloaded files available
• The bot needs to be able to join groups. Send /setjoingroups to https://telegram.me/BotFather
• The bot needs to be able to read all messages. Send /setprivacy to https://telegram.me/BotFather

Copy config.ini.example to config.ini and enter all the needed informations. First time starting, the bot creates the sqlite3 database. After this you can add servers with this code snippet:

from tg_bot import TGBot
from database import DatabaseConnection
from irc_server import IRCServer

dbc = DatabaseConnection()
dbc.create_tables()
irc_server = IRCServer('Freenode', 'chat.freenode.net')
dbc.add_irc_server(irc_server)

Start bot.py Invite the bot into a group and send to the group /start

• start - Create a bridge between this group and an irc channel
• delete - Deletes an existing bridge or secondary bridge
• help - Show the contact of the maintainer