L1 Sequencing refers to the process by which transactions are ordered and included into blocks on a layer-1 blockchain, the foundational network. This ordering determines the definitive execution sequence of operations and establishes their final position in the chain. It is a critical function that prevents double-spending and ensures the consistent state of the ledger. The integrity of this sequence is paramount for the security of all dependent layer-2 solutions.
Context
L1 Sequencing is a frequent topic in news regarding blockchain transaction finality, network congestion, and the security assumptions of scaling solutions. Debates often focus on decentralization of sequencers and resistance to censorship. Ongoing research aims to optimize transaction ordering mechanisms for improved network performance and fairness.
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.
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