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ZK Rollup Meaning

A ZK rollup (zero-knowledge rollup) is a layer‑2 scaling solution that aggregates hundreds or thousands of transactions off-chain and uses zero-knowledge proofs to succinctly verify the correctness of the batch on the underlying blockchain. The rollup operator records transaction data in compressed form on-chain and submits a validity proof that allows anyone to verify that the new state is correct without processing each transaction individually.

ZK rollups provide high throughput and lower fees while inheriting the security of the base layer because validators can enforce the rollup state by checking proofs.

Popular applications include decentralised exchanges, payments, and gaming.

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