Zero-Knowledge Rollup (zk-Rollup)

A Zero-Knowledge Rollup (zk-Rollup) — also known as a Zero-Knowledge Proof Rollup or ZKR — is a Layer-2 scaling solution that uses zk-SNARKs (privacy-based cryptographic proofs) to allow blockchains to bundle transactions into one computation prior to execution by using a smart contract. This secure scaling solution increases transactional throughput while also enhancing protocol privacy. StarkWare, Loopring, Hermez, and Aztec are blockchain networks that use zk-Rollups. Sometimes used in unison with decentralized exchange (DEX) protocols, implementing zk-Rollups on some blockchains can lead to lower transaction fees, improved liquidity, enhanced non-custodial crypto ownership, and more.

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