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That's the bold claim Succinct's Uma Roy has been making for some time now, and it's becoming more and more true by the day. Ethereum's Layer 2s – first Mantle, then World Chain, and now Arbitrum and its ecosystem – are shifting from "optimistic" assumptions to cryptographic certainty through zero-knowledge proofs.
Ethereum's original scaling challenge was simple to understand but hard to solve: the L1 got congested, fees skyrocketed, and users suffered. Rollups emerged as the answer, bundling transactions offchain before settling on Ethereum. But we ended up with two flavors: optimistic and zero-knowledge.
The former, which is the dominant standard for rollups like Arbitrum or Base today, assumes transactions are valid unless someone challenges them within a week, meaning some illegitimate transactions could slip through to mainnet. The latter guarantees transaction legitimacy via cryptography and high-level math.
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