Blacklist

A blacklist is a contract feature that lets a token owner block specific wallets from transferring or selling.

The contract stores flagged addresses and checks them inside its transfer logic, reverting any transfer from a blacklisted wallet. It is a common honeypot mechanism, since buyers trade freely and then get blacklisted so they can never sell. A whitelist is the inverse, permitting only approved addresses to trade, and either hands the owner discretionary control over who can exit.