This article examines application-controlled execution (ACE), focusing on how it allows applications to dictate transaction order, specifically through a mechanism called cancel prioritization. It analyzes different implementation designs and their trade-offs, highlighting Hyperliquid's approach as a leading example. The discussion also addresses potential challenges like block-building complexity and composability issues.

The article explains the concept of Miner Extractable Value (MEV) in the blockchain ecosystem, detailing how miners can exploit transaction ordering for profit. It highlights the implications of MEV on network efficiency and fairness, as well as the challenges it presents to decentralized finance (DeFi) applications. Furthermore, it discusses potential solutions to mitigate the negative effects of MEV on users and the broader blockchain network.