Definition ∞ An ephemeral sequencer is a temporary or short-lived component responsible for ordering transactions in a blockchain system, particularly within rollups or layer-2 solutions. Unlike permanent sequencers, an ephemeral sequencer operates for a limited duration or a specific set of transactions. This design choice can enhance decentralization and censorship resistance. It offers operational flexibility.
Context ∞ News about layer-2 scaling solutions and rollup technology often mentions ephemeral sequencers in the context of improving transaction ordering and network resilience. Discussions focus on how these temporary entities mitigate the risks associated with centralized sequencers, such as single points of failure or malicious transaction reordering. Their implementation aims to bolster the security and fairness of transaction processing.