Arbitrum: Scalable, private smart contracts

on YouTube ↗20m

" summary

Arbitrum is a prototype blockchain layer that moves smart-contract execution off-chain to managers and uses the on-chain verifier only for disputes, claiming any-trust guarantee (one honest manager suffices). It implements a bisection challenge protocol plus one-step proofs ~500 bytes, a Merkle-tree VM with tuple-based memory and constant-time instruction checks. Prototype is in Go with assembly, achieves ~1M hash/sec per VM vs Ethereum ~10k global, and the dispute protocol and VM design are demonstrated working.

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" chapters (5)

1. 0:00Introduction
2. 0:25What are smart contracts
3. 2:12Scaling smart contracts
4. 12:57Memory
5. 16:00Privacy

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