• TELEGRAM_TOKEN Your Telegram bot Token (get from BotFather)
• GROUP_WHITELIST Enter the group id that can use the bot (see .env_example)
• POSTGRES_URL skip this, user below
• POSTGRES_HOST Postgresql Host
• POSTGRES_USER Postgresql User
• POSTGRES_DATABASE Postgresql Database name
• POSTGRES_PASSWORD Postgresql Password
• POSTGRES_PORT Postgresql port
• MODERATE_ON set true/false so that some types of chat can only be sent if xp is more than min xp
• MIN_XP if MODERATE_ON set true, set MIN_XP (default 500)
• LESS_BOT_SPAM set true/false to automatically delete chats from bots based on time BOT_EXPIRATION
• BOT_EXPIRATION (default 3)
• Import db to your Postgresql database, if there is an error when importing, ignore the important thing the table is all there.

See .env_example change to .env and change the contents , or set Config Vars on heroku.

• /help Get help
• /xp Get current XP (or reply user to get current xp that user)
• /level Get current level (or reply user to get current level that user)
• /topranks Get top rank from 1-3
• /ranks 10 Get list rank from 1-10 (change 10 to what you want)
• /rank Get info rank, /rank png (to export to image)

• NodeJS
• PostgreSQL for Database
• Dependencies
  • https://github.com/yagop/node-telegram-bot-api
  • https://github.com/brianc/node-postgres
  • https://github.com/motdotla/dotenv

If you want another xp telegram bot, you can see my reference for making this bot:
https://github.com/terorie/xpbot-telegram