Optimistic Fraud Proofs

Mechanism

Optimistic fraud proofs are a core security mechanism employed in optimistic rollup solutions to ensure the integrity of off-chain computations. Under this model, transactions are assumed to be valid by default, allowing for rapid processing and aggregation. However, a designated challenge period follows, during which any participant can submit a “fraud proof” if they detect an invalid state transition. This proof cryptographically demonstrates the fraud, leading to the sequencer’s penalty and state reversion. This approach balances scalability with security.