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  • Nearly-zero cost attack scenario on Optimistic Rollup

    TL;DR: Optimistic rollup relies on absolute censorship-resistance of L1 for its security. While L1 provides some decent economic incentives against mass censorship, it is easy to construct a scenario in which censorship of a particular single transaction is strongly rewarded, while non-censoring behavior is strongly penalized for a prolonged period of time. Optimistic Rollup’s 1 honest observer assumption is in reality 51% altruistic (not just honest!) L1 miners assumption.

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