Vitalik Buterin · Ethereum · The Block
Vitalik Buterin proposes ‘Extremely Lean’ Ethereum, shrinking the chain to near-zero state with ZK proofs
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Vitalik Buterin has outlined a technical proposal to radically shrink Ethereum's consensus layer by shifting much of the state management burden to validators using zero-knowledge proofs, as part of a broader push toward a more efficient "Lean Ethereum.
Key facts
- Phase 1 removes most validator data from the chain and replaces per-epoch balance updates with a single daily ZK-STARK proof submitted by each validator, shrinking onchain state to a few bytes per
- Lean Ethereum is a long-term vision and roadmap first brought up around mid-2025 to overhaul Ethereum's core protocol to make it stronger, more secure, more decentralized, and quantum-resistant
- Buterin's latest "Extremely Lean" proposal is centered around a redesign of Ethereum's Beacon Chain to drastically minimize onchain state and processing
- In a recent Ethereum Research forum post titled "The Extremely Lean Chain," Buterin detailed how recursive STARK proofs could minimize onchain data while supporting upgrades like single-slot finality
Summary
In a recent Ethereum Research forum post titled "The Extremely Lean Chain," Buterin detailed how recursive STARK proofs could minimize onchain data while supporting upgrades like single-slot finality and quantum-resistant cryptography. This past weekend, Buterin referred to "Lean Ethereum" as the network's "third major iteration" and said the series of updates could rival the Merge, when Ethereum pulled off the highly technically complex shift to proof-of-stake consensus. Lean Ethereum is a long-term vision and roadmap first brought up around mid-2025 to overhaul Ethereum's core protocol to make it stronger, more secure, more decentralized, and quantum-resistant. Buterin's latest "Extremely Lean" proposal is centered around a redesign of Ethereum's Beacon Chain to drastically minimize onchain state and processing.