Decibel Integrates Aptos Encrypted Mempool to Neutralize MEV

The feature, based on the Aptos Improvement Proposal 144, encrypts transaction data at the client level before submission. While sender addresses and gas fees remain transparent to ensure network integrity, the specific trading instructions are hidden from block producers during the ordering phase. Decryption occurs only after the network reaches consensus, utilizing a threshold encryption scheme where validators hold individual shares of the decryption key. This design ensures that no single entity can expose the contents of a pending trade.

Technically, the implementation introduces minimal overhead, with benchmarks showing an additional 20 milliseconds of latency per block on a 50-node network. Developed by Aptos Labs cryptographer Rex Fernando, the system allows for high-throughput processing without requiring modifications to existing Move smart contracts. For Decibel, which has seen its total value locked fluctuate around $29.4 million, this upgrade represents a significant shift toward providing institutional-grade privacy onchain. Although transaction simulation remains a challenge for privacy, the integration marks a transition from theoretical research to active utility for the Aptos ecosystem.