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When there’s a dispute on an Arbitrum network, Nitro replays the execution of the chain in WASM. Honest Arbitrum validators will then bisect what is being disputed until a single invalid step is identified and checked on-chain via a “one-step proof.”

https://twitter.com/CryptoIsCute/status/1742274397073748015
https://docs.arbitrum.io/stylus/stylus-gentle-introduction

The primary catalysts for the next market meltdown could potentially be the stETH exploit, bridge exploit, restaking (or rehypothestaking), or if another protocol with endogenous collateral becomes too large. All risks are closely related to L2s.
Superchain is the main thesis of Optimism, aiming to create its own hub where participants can share bridges and communicate more effectively with each other, rather than relying on external chains. These chains will also share governance.

https://twitter.com/stacy_muur/status/1742879350859722870

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