Decibel Trade Activates Aptos Encrypted Mempool to Reduce MEV

Encrypted Mempool Goes Live

Decibel Trade has switched on Aptos' Encrypted Mempool, a protocol feature that obscures pending transaction details from validators until after a block is proposed. The mechanism hides order information that would otherwise be visible on-chain before settlement, preventing validators and other actors from observing and exploiting trade intent in advance.

How It Addresses MEV

The encrypted mempool targets two common extraction tactics: frontrunning, where an actor observes a pending trade and places their own transaction ahead of it; and sandwich attacks, where malicious actors both precede and follow a target transaction to extract value from slippage. By concealing order details until execution, the encrypted mempool removes the visibility window that enables these strategies. The privacy feature does not change Aptos' underlying consensus or finality guarantees—only the pre-execution visibility of transaction contents.

Implications for Market Structure

Traders using Decibel Trade on Aptos now have the option to route orders through the encrypted mempool rather than the standard public pool. The feature depends on validator participation and cryptographic verification at proposal time, so its effectiveness scales with adoption. If widely adopted, encrypted mempools can reduce the MEV tax on retail and institutional traders, though sophisticated actors may develop new extraction methods over time.