Shared Sequencing Layer

Definition ∞ A Shared Sequencing Layer is a specialized component or protocol designed to aggregate and order transactions from multiple independent blockchain networks or rollups before they are submitted to a base layer blockchain for final settlement. This layer aims to improve transaction ordering fairness, reduce maximum extractable value (MEV) exploitation, and enhance interoperability across various layer-2 solutions. It acts as a neutral arbiter for transaction inclusion across different chains. This approach optimizes block production and data availability.
Context ∞ The development of shared sequencing layers is a significant area of innovation in the scalability and interoperability landscape for blockchain networks. Discussions often center on their potential to mitigate centralization risks associated with individual rollup sequencers and to create a more cohesive multi-chain environment. Observing the implementation and adoption of these layers provides key insights into the future architecture of decentralized applications and their transaction processing.