What is Rollup?

Question

What is Rollup?

Accepted Answer

A **Rollup** is a Layer 2 (L2) scaling solution for blockchains, primarily Ethereum, that executes transactions off-chain, bundles hundreds or thousands of these transactions into a single batch, and then posts a compressed summary of the state change back to the Layer 1 (L1) mainnet, significantly increasing throughput and reducing transaction costs.

Rollup

What is Rollup?

What is a blockchain Rollup and how does it achieve scaling while maintaining Layer 1 security?

How do Optimistic Rollups and Zero-Knowledge Rollups differ in their security and transaction finality mechanisms?

What are the key performance metrics and real-world examples demonstrating the impact of Rollups on transaction costs and network throughput?

How is the Rollup ecosystem evolving with the introduction of Rollup-as-a-Service (RaaS) and application-specific Appchains?

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