Rollup

Definition ∞ A rollup is a layer-two scaling solution for blockchains that executes transactions off the main chain but posts transaction data back to the main chain. This approach significantly increases transaction throughput and reduces fees while inheriting the security of the base layer. Rollups are categorized into optimistic rollups and zero-knowledge rollups based on their verification methods.
Context ∞ Rollups are currently a primary focus in discussions about scaling blockchains, particularly Ethereum. News reports frequently detail the development and adoption of various rollup solutions, their impact on transaction costs, and their role in enabling more complex decentralized applications. The ongoing competition and innovation in the rollup space are critical to the future usability and adoption of blockchain technology.