Optimistic Proofs

Algorithm

Optimistic Proofs represent a class of validity proofs utilized in Layer-2 scaling solutions for blockchains, notably within the cryptocurrency ecosystem, functioning as a challenge-response mechanism to ensure state correctness. These proofs operate on the assumption that computations are correct, only requiring a challenge if discrepancies are suspected, thereby reducing on-chain verification costs. The core principle involves a proposer submitting a state transition, and a fraud-proof system allowing challengers to dispute it with evidence of incorrect computation, initiating a dispute resolution process. This contrasts with zero-knowledge proofs, which provide cryptographic certainty upfront, and instead relies on economic incentives to maintain integrity.