Rollup Sequencing refers to the process of ordering and batching transactions within a rollup, a layer-2 scaling solution for blockchains, before submitting them to the main chain. The sequencer is responsible for collecting transactions, compressing them, and then posting the aggregated data as a single transaction to the layer-1 blockchain. This process significantly improves transaction throughput and reduces fees by offloading computation from the main chain. It is a critical component of rollup operation.
Context
The centralization versus decentralization of Rollup Sequencing is a prominent debate in the development of layer-2 solutions, impacting censorship resistance and security. Discussions often concern the potential for sequencers to front-run transactions or to be single points of failure. Future advancements aim to decentralize sequencer roles through rotating committees or auction mechanisms, enhancing the robustness and trustlessness of rollup networks.
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