A Shared Sequencer is a decentralized service that provides transaction ordering and batching for multiple layer-2 rollup networks simultaneously. Instead of each rollup operating its own sequencer, a shared sequencer aggregates transactions from various rollups. This mechanism aims to improve capital efficiency and reduce fragmentation across the layer-2 ecosystem. This innovation seeks to optimize layer-2 operations.
Context
The concept of a shared sequencer is a cutting-edge development in layer-2 scaling, addressing the challenges of liquidity and interoperability among different rollups. The current discussion centers on the security implications and potential for censorship resistance when a single entity or group orders transactions for multiple chains. Future progress will focus on decentralizing shared sequencers to prevent single points of control and ensure fair transaction inclusion. This advancement is vital for a more cohesive layer-2 environment.
The Based Rollups paradigm leverages the Layer One's block production to sequence Layer Two transactions, fundamentally eliminating centralized sequencer risk and achieving native censorship resistance.
Set Byzantine Consensus introduces a decentralized "arranger" for rollups, fundamentally solving the single-node sequencer bottleneck and enhancing censorship resistance.
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