Telegram Bot

• Deletes messages matching specified patterns
• Bans users for posting messagses matching specified patterns
• Bans users with usernames matching specified patterns
• Records logs of converstations

Installation

• Required: Python 3.x, pip, PostgreSQL
• Create virtualenv
• Clone this repo
• pip install --upgrade -r requirements.txt

Database setup

• Store database URL in environment variable.

export TELEGRAM_BOT_POSTGRES_URL="postgresql://<user>:<password>@localhost:5432/<databasename>"

• Run: python model.py to setup the DB tables.

Setup

• Create a Telegram bot by talking to @BotFather : https://core.telegram.org/bots#creating-a-new-bot
• Use /setprivacy with @BotFather in order to allow it to see all messages in a group.
• Store your Telegram Bot Token in environment variable TELEGRAM_BOT_TOKEN. It will look similar to this:

export TELEGRAM_BOT_TOKEN="4813829027:ADJFKAf0plousH2EZ2jBfxxRWFld3oK34ya"

• Create your Telegram group.
• Add your bot to the group like so: https://stackoverflow.com/questions/37338101/how-to-add-a-bot-to-a-telegram-group
• Make your bot an admin in the group

Configuring patterns

• Regex patterns will be read from the following env variables
  • MESSAGE_BAN_PATTERNS Messages matching this will ban the user.
  • MESSAGE_HIDE_PATTERNS Messages matching this will be hidden/deleted
  • NAME_BAN_PATTERNS Users with usernames or first/last names maching this will be banned from the group.
  • SAFE_USER_IDS User ID's that are except from these checkes. Note that the bot cannot ban admin users, but can delete their messages.

Sample bash file to set MESSAGE_BAN_PATTERNS:

read -r -d '' MESSAGE_BAN_PATTERNS << 'EOF'
# ETH Address
# e.g. F8C8405e85Cfe42551DEfeB2a4548A33bb3DF840
[0-9a-fA-F]{40,40}
# BTC Address
# e.g. 13qt9rCA2CQLZedmUuDiPkwdcAJLsuTvLm
|[0-9a-fA-Z]{34,34}
EOF

Running

Locally

• Run: python bot.py to start logger
• Messages will be displayed on stdout as they are logged.

On Heroku

• You must enable the worker on Heroku app dashboard. (By default it is off.)