Aptos Launches Encrypted Mempool to Stop Sandwich Bots

Aptos has deployed an encrypted mempool on mainnet, keeping transaction contents hidden until validators fix their place in a block. The change is designed to protect users from MEV bots that profit from seeing orders before execution.

The update targets sandwich attacks and similar strategies that rely on visible pending transactions. The source post links to a separate breakdown of how the protection works and what costs it introduces, but does not provide those details in the post itself.