Definition ∞ A rollup scaling solution is a layer-2 protocol that processes transactions off the main blockchain, then batches them and submits a compressed summary or cryptographic proof to the base layer. This approach significantly increases transaction throughput and reduces fees on the main chain. Rollups are a primary strategy for enhancing blockchain scalability.
Context ∞ Rollup scaling solutions represent the prevailing approach to address blockchain scalability limitations, particularly for networks like Ethereum. The ongoing discourse centers on the distinction between optimistic and zero-knowledge rollups, their security models, and the continuous efforts to optimize their efficiency, decentralization, and user experience.
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