Definition ∞ Message ordering refers to the sequence in which transactions or communications are processed and recorded within a distributed system or blockchain. Maintaining a consistent and agreed-upon order is essential for ensuring the integrity and determinism of the ledger. Improper ordering can lead to inconsistencies, double-spending, or other protocol violations.
Context ∞ The challenge of message ordering is fundamental to achieving consensus in decentralized networks, particularly in the context of preventing front-running and ensuring fair transaction inclusion. News frequently discusses advancements in consensus algorithms designed to optimize message ordering for improved throughput and security. The integrity of message ordering directly impacts the reliability of blockchain applications.