The Optimistic Execution Model is a processing strategy where transactions or computations are assumed to be valid and executed immediately, without prior verification. This assumption allows for faster processing and improved scalability. A challenge period follows execution, during which anyone can submit a “fraud proof” if they detect an invalid state transition. If a fraud is proven, the transaction is reverted, and the faulty party is penalized.
Context
In the blockchain ecosystem, the Optimistic Execution Model is a core component of optimistic rollups, a popular layer-2 scaling solution for increasing transaction throughput on base chains like Ethereum. A key discussion revolves around the duration of the challenge period, which impacts withdrawal times and the overall user experience. Future developments are concentrated on reducing these challenge periods through advanced cryptographic techniques and improving the efficiency of fraud proof generation and verification.
The Parallel Optimistic Agreement primitive replaces global transaction ordering with per-contract consensus, unlocking horizontal throughput scaling and near-optimal latency.
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