Decentralized Sequencer Model

Definition ∞ The Decentralized Sequencer Model refers to an architectural approach for ordering and submitting transactions in layer-2 blockchain solutions, where multiple independent entities perform this function. Instead of a single, centralized sequencer, a distributed network of sequencers processes and batches transactions. This model enhances censorship resistance, reduces single points of failure, and improves network resilience. It distributes control over transaction inclusion and ordering.
Context ∞ The Decentralized Sequencer Model is a prominent topic in discussions about improving the robustness and fairness of optimistic and zero-knowledge rollups. News reports often highlight its role in mitigating risks associated with centralized sequencers, such as potential for front-running or transaction censorship. Achieving a fully decentralized sequencer network is a significant development goal for many layer-2 projects, impacting their long-term security and user confidence.