Definition ∞ An L1 commitment refers to the act of recording data or a cryptographic proof onto the main layer-1 blockchain. This process establishes a verifiable and immutable record of an event or transaction from a layer-2 solution or off-chain system. By committing to L1, these systems inherit the security and finality guarantees of the underlying base layer. This is a fundamental mechanism for ensuring data integrity and trust in scaling solutions.
Context ∞ L1 commitments are central to the security model of layer-2 scaling solutions like rollups, ensuring that off-chain computations retain the security assurances of the main blockchain. The discussion often concerns the efficiency and cost of these commitments, as they directly impact the economic viability of scaling solutions. Future advancements seek to optimize commitment schemes to reduce transaction fees and increase throughput on layer-1 networks.
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