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Crypto

Rollup

A Layer-2 scaling technique that bundles transactions and posts compressed data to L1.

In depth

Two main types: Optimistic (assume valid, allow fraud proofs — Arbitrum, Optimism) and ZK (cryptographic validity proofs — zkSync, Starknet). ZK rollups offer faster finality; optimistic rollups currently have larger ecosystems.

Frequently asked about Rollup

What is Rollup?

A Layer-2 scaling technique that bundles transactions and posts compressed data to L1. Two main types: Optimistic (assume valid, allow fraud proofs — Arbitrum, Optimism) and ZK (cryptographic validity proofs — zkSync, Starknet). ZK rollups offer faster finality; optimistic rollups currently have larger ecosystems.

Why does Rollup matter for investors?

In crypto, Rollup is one of the building blocks investors use to compare opportunities and assess risk. Understanding it helps you read research notes, earnings reports, and market commentary without getting lost in jargon.

How is Rollup used in practice?

Two main types: Optimistic (assume valid, allow fraud proofs — Arbitrum, Optimism) and ZK (cryptographic validity proofs — zkSync, Starknet). ZK rollups offer faster finality; optimistic rollups currently have larger ecosystems..

Related terms

Layer 2 (L2)

Secondary blockchain networks built on top of base layers (L1) to improve speed and reduce costs.

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