Aptos, a layer-1 blockchain, has launched a feature called Encrypted Mempool, Cointelegraph reported on Oct 13, 2026. Using it is optional. Aptos says it is meant to protect traders from attacks that rely on maximal extractable value (MEV), including frontrunning and sandwich attacks.
The mempool holds transactions that have been sent but not yet confirmed. Bots can read those waiting transactions and act on them before they settle. With Encrypted Mempool, a transaction's details stay hidden until its order is finalized, so a bot cannot see a trade while it is still pending.
Some things are not yet known. The report does not say how many users or applications will turn the feature on, whether it changes transaction costs, or how much MEV it will actually stop. Because the feature is optional, transactions that do not use it get no protection.
For anyone already holding a perpetual position on Bitget, Bybit, MEXC or OKX, nothing changes directly. Those contracts trade on each exchange's own order book, not in the Aptos mempool. Funding rates, trading fees and liquidity on those four venues are not affected by this launch.
Source: cointelegraph — Aptos rolls out Encrypted Mempool to curb frontrunning, sandwich attacks