What Is the Difference between an Optimistic Rollup and a ZK-Rollup?
Both are Layer-2 scaling solutions, but they differ in their security model. Optimistic Rollups assume transactions are valid by default and use a "fraud proof" system, allowing a challenge period for invalid transactions.
ZK-Rollups (Zero-Knowledge) prove the validity of all transactions cryptographically off-chain using complex math (zero-knowledge proofs) before posting a single summary to Layer-1. ZK-Rollups have faster finality.
Glossar
Optimistic Rollup
Architecture ⎊ Optimistic rollups represent a Layer-2 scaling solution for blockchains, primarily Ethereum, employing a distinct data availability and validity proof strategy.
Zk-Rollup
Scalability ⎊ Zk-Rollups represent a Layer 2 scaling solution for blockchains, critically addressing transaction throughput limitations inherent in Layer 1 protocols like Ethereum.
Decentralized Derivatives
Architecture ⎊ Decentralized derivatives represent a fundamental shift in financial contract design, moving away from centralized exchanges and intermediaries towards blockchain-based systems.
Optimistic Rollups
Scalability ⎊ Optimistic Rollups represent a Layer 2 scaling solution for Ethereum, designed to enhance transaction throughput and reduce associated gas fees without compromising decentralization.