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Vitalik Buterin announced a three‑to‑four‑year “Lean Ethereum” plan on July 4, 2026, targeting recursive STARK proofs, quantum‑resistant cryptography and new
Ethereum’s co‑founder Vitalik Buterin posted on X on July 4, 2026 that the network will enter a third evolutionary phase dubbed “Lean Ethereum,” a multi‑year overhaul aimed at dramatically lowering transaction costs and future‑proofing the protocol [1].
| At a glance | |
|---|---|
| Announcement date | July 4 2026 |
| Upgrade scope | Three‑to‑four‑year roadmap, comparable to the 2022 Merge |
| Key technical shift | Recursive STARK proofs become core verification method |
| Fee reduction target | >10× lower fees for apps migrating to new state formats |
Buterin’s “strawmap” outlines a series of coordinated hard forks, beginning with the H‑star (Hegota) fork as the last pre‑Lean upgrade, followed by I‑star and subsequent forks that embed the Lean design [1]. Central to the plan is replacing direct transaction re‑execution with recursive STARK proofs, a move expected to boost efficiency and scalability while integrating quantum‑resistant cryptography across the stack. The consensus layer will also be decoupled, separating data availability from finality and introducing one‑ or two‑round finality mechanisms to speed confirmations.
The roadmap proposes retaining the existing “dynamic” state but adding new, more restrictive state categories optimized for scalability. These new formats are tailored for common use cases such as ERC‑20 tokens, NFTs and DeFi applications. While existing contracts need not be rewritten, developers that adopt the new state designs could see transaction fees drop by more than an order of magnitude [1]. By roughly 2030, Buterin envisions Ethereum maintaining about 2 TB of traditional dynamic state while supporting up to 100 TB of the newer, efficient state types [1].
In a related May 2026 statement, Buterin said the Ethereum Foundation will shrink its ETH holdings to roughly 0.16 % of total supply and focus on “CROPS” – censorship resistance, capture resistance, openness, privacy and security [2]. He framed the Foundation as “one node, with a defined purpose,” emphasizing longevity over breadth and reducing ETH sales to align with the new scaling strategy [2].
The Lean Ethereum plan signals a strategic shift from incremental upgrades to a comprehensive redesign, aiming to keep the network competitive as layer‑2 solutions mature. Whether the envisioned fee cuts and quantum‑resistant upgrades will materialize on schedule remains the key question for developers and investors alike.
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AI-assisted synthesis by the TrendWatcher Editorial Desk · sourced from 2 outlets · Jul 29, 2026 · How we report
Ethereum's mainnet faces congestion and high gas fees because demand exceeds its capacity, pricing out many users from decentralized applications.
The sources identify channels, Plasma, independent sidechains, optimistic rollups, and ZK rollups, each offering different balances of speed, cost, and security.
Unichain claims to lower transaction costs by up to 95% compared to Ethereum and to achieve one‑second block times, with future sub‑blocks of 250 ms for near‑instant transactions.
Optimistic rollups assume transactions are valid unless challenged, leading to longer withdrawal periods, while ZK rollups provide cryptographic proofs of validity, enabling faster asset movement.
Rollups inherit Ethereum's security by posting data to the mainnet, whereas sidechains and Plasma rely on their own security mechanisms, which are generally considered less robust.