A Rollup Security Model describes the architectural design and mechanisms employed to secure a layer-2 rollup solution on a blockchain. This model specifies how transactions processed off-chain are validated and then committed back to the mainnet, inheriting its security properties. It typically involves cryptographic proofs, fraud proofs, or validity proofs to ensure the correctness of off-chain computations. The integrity of the rollup relies heavily on its security model.
Context
The rollup security model is a central topic in the ongoing development and adoption of Ethereum scaling solutions. Different rollup types, such as optimistic rollups and ZK-rollups, employ distinct security models with varying trade-offs in terms of speed, cost, and trust assumptions. Discussions often compare the robustness of these models against potential vulnerabilities and censorship risks. Enhancing and standardizing rollup security models is critical for ensuring the long-term viability and safety of layer-2 ecosystems.
A new shared sequencing mechanism uses decentralized consensus to enforce atomic transaction ordering across multiple rollups, neutralizing cross-rollup MEV.
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