Definition ∞ Event ordering fairness in distributed systems refers to the principle that transactions or events are processed in a sequence that does not grant undue advantage to any specific participant. This concept is particularly relevant in blockchain networks, where the order of transactions can significantly impact outcomes, such as in decentralized exchanges. Achieving fairness helps prevent front-running and other forms of manipulative behavior. It ensures equitable access and execution for all network users.
Context ∞ Discussions surrounding event ordering fairness are prominent in research on blockchain scalability and consensus mechanisms, especially concerning MEV (Maximal Extractable Value) issues. News often highlights proposed protocol upgrades or new designs aimed at mitigating unfair transaction sequencing. The pursuit of fairness is a continuous effort to improve the integrity and trustworthiness of decentralized applications.