Blockchain & Infrastructure Also: optimistic rollup, ZK rollup

Rollup

A Layer 2 scaling technique that executes transactions off-chain and posts compressed proofs to a base chain.

Rollups execute transactions in batches outside Ethereum's main chain and publish compressed data or proofs back to Layer 1, inheriting its security. Optimistic rollups assume transactions are valid and rely on a fraud-proof window for dispute resolution. ZK (zero-knowledge) rollups generate cryptographic validity proofs for every batch, enabling faster finality. Arbitrum and Optimism dominate optimistic rollups; zkSync, Starknet, and Polygon zkEVM lead the ZK rollup space.

Related Terms

Layer 2 L2 A scaling network built on top of a base blockchain that... Gas The unit of computation cost for executing operations on... Bridge Infrastructure that transfers assets or data between two... Zero-Knowledge Proof ZKP A cryptographic method allowing one party to prove...

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