Optimistic Rollup Definition - Glossary

Optimistic Rollup is a Layer 2 scaling solution for Ethereum, enhancing transaction speed and reducing costs off-chain.

Optimistic Rollup is a Layer 2 scaling technique used to improve Ethereum's efficiency. It processes transactions off-chain, reducing congestion on the main blockchain. This system assumes transactions are valid ("optimistically"), unless challenged within a set period. Challenges involve fraud proofs, ensuring security and correctness. By minimizing on-chain data and leveraging off-chain computation, Optimistic Rollups increase throughput and lower transaction costs without sacrificing Ethereum's security. They are crucial for handling high transaction volumes, making Ethereum more scalable and user-friendly for decentralized applications.