Top Highlights

• Each optimistic rollup is managed by a set of smart contracts deployed on the Ethereum network.
• The architecture of an optimistic rollup comprises the following parts:
• As optimistic rollups are designed to run programs either written or compiled for the EVM, the off-chain VM incorporates many EVM design specs.
• Optimistic rollups are described as 'hybrid scaling solutions' because, while they exist as separate protocols, their security properties are derived from Ethereum.
• is critical because without access to state data, challengers cannot construct fraud proofs to dispute invalid rollup operations.

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