Ethereum's 7-Fork Plan to 2029 Just Got Clearer: Seconds-Finality, 10,000 TPS and a Quantum Shield — 5 Dates That Decide It

Ethereum researchers have just clarified the order of the seven hard forks that would rebuild the network by the end of 2029 — and the plan is far bigger than a single upgrade. Finality measured in seconds instead of roughly 16 minutes, base-layer throughput of 10,000 transactions per second, shielded ETH transfers, and cryptography designed to survive quantum computers are all on the same roadmap. ETH, meanwhile, trades around $2,421 after a 6.4% jump on November 4, so the stakes for holders are immediate, not theoretical. Here is what the clarified plan actually says, what it does not promise, and the five dates that decide whether it happens on time.

The clarification, reported on November 5, 2026, concerns the sequencing of the forks that lead to what researchers call Lean Ethereum. The roadmap itself is not new — it traces back to a draft "strawmap" published by Ethereum Foundation researchers in February 2026 — but the November update pins down how the forks should be ordered, with the final fork, L*, completing the transition. That matters because, until now, much of the coverage treated Lean Ethereum as one vague future upgrade. It is not. It is a multi-year sequence, and each fork has a narrow job.

What Lean Ethereum Actually Is

Lean Ethereum is framed by its researchers as the third major version of the protocol: the first was Ethereum's original architecture, the second was the transition to proof of stake, and the third is this rebuild of the core. It is not a single network upgrade and it is not a new chain. It is a draft direction for changing most of the protocol's core components — consensus, data availability, state storage, execution, privacy and post-quantum security — over roughly three to four years.

Two facts about the plan are routinely misunderstood, so they are worth stating plainly. First, the roadmap is a coordination tool, not an approved schedule. The Foundation's researchers describe it as a "strawman" roadmap: a framework for discussion among researchers, client teams and governance participants. Ethereum has no single authority that can impose a final roadmap, so dates and included features remain subject to change as research and testing progress. Second, the plan is designed to keep backward compatibility for existing applications. Apps already running on Ethereum should not need to be rebuilt from scratch — a point the November clarification stresses, and one that separates this plan from a disruptive rewrite.

For readers new to the network, What Is Ethereum? The Complete Beginner's Guide to How ETH Works in 2026 explains the base layer these forks would change, and Crypto Staking Explained covers how validators — the actors most affected by the consensus changes — earn rewards today.

The 7-Fork Timeline: From Glamsterdam to L*

The draft assumes a cadence of roughly one fork every six months. The sequence runs through named and placeholder forks, and the November 5 clarification orders them as follows:

Fork	Approximate window	Role in the plan
Glamsterdam	On deck	Next upgrade in line; the network's immediate development priority
Hegotá	Late 2026 or early 2027 (reported expectation)	Expected to be the last fork before the full Lean Ethereum phase begins
I*	2027	First placeholder fork of the Lean phase
J*	2028	Continues consensus, execution and data-layer rebuild
K*	2028	Advances the data-layer migration toward STARK-based constructions
L*	2029	Final fork; completes the Lean Ethereum transition
M+	2030 and beyond	Longer-term items beyond the Lean horizon

Each fork is organized across three layers — the consensus layer, the data layer and the execution layer — and the All Core Devs process generally limits each fork to a single consensus headliner and a single execution headliner to protect the six-month cadence. The exception is L*, which carries two consensus headliners tied to lean consensus. That discipline is the point: seven smaller, shippable forks instead of one giant upgrade that slips for years.

One caution belongs in any honest timeline. Glamsterdam has already moved before — earlier coverage of the upgrade treated its activation as upcoming when its timing was in fact postponed — so readers should treat every date in the table above as a planning window, not a promise. If a fork slips, the sequence matters more than the calendar: the later forks depend on the earlier ones.

The 5 North Stars: What "Lean" Is Trying to Achieve

The roadmap defines five long-term goals, sometimes called its north stars. Together they explain why researchers are willing to rebuild so much of a network that already works:

Goal	Target	Why it matters for holders
Fast L1	Finality in seconds, not ~16 minutes	Exchanges, bridges and apps confirm deposits far sooner
Gigagas L1	10,000 transactions per second on the base layer	More activity fits on Ethereum itself instead of being pushed elsewhere
Teragas L2	10 million TPS via data availability sampling	Layer-2 networks scale far beyond today's capacity
Private L1	Shielded ETH transfers	Base-layer privacy without leaving Ethereum
Post-quantum security	Quantum-resistant cryptography by 2029	Protection before quantum computers threaten current signatures

The speed goal has the most concrete numbers attached. Vitalik Buterin has described slot times shrinking step by step — 12 seconds, then 8, then 6, 4, 3 and finally 2 — while finality falls from roughly 16 minutes to potentially single-digit seconds. The mechanism is a shift from the current Gasper consensus to a one-round Byzantine Fault Tolerant design called Minimmit. In plain terms: validators would agree on a block in a single round instead of the current multi-stage process, which is what makes seconds-finality plausible rather than just aspirational.

The fee story needs a similar precision. Tokens using a new scalable tier are projected to see fee reductions of more than 10x. That is a projection, not a guarantee, and it applies specifically to that tier rather than to every transaction on the network. Anyone promising "10x cheaper Ethereum for everyone" from this roadmap is overselling it.

The Quantum Shield: leanVM, STARKs and the "Last Hash Function"

Quantum computing is the roadmap's most urgent driver, and the reason the 2029 target exists at all. Researchers anticipate quantum capabilities becoming a real threat around 2030, so the post-quantum transition is timed to finish just before that window. The November clarification sits alongside earlier work on this front: our coverage of Ethereum's Quantum Deadline: December 2028 — leanVM Verified, 1,000 Signatures a Second explains the verification milestone that makes the quantum plan credible rather than speculative.

The technical core is a move to zero-knowledge STARKs — Scalable Transparent Arguments of Knowledge — which do not rely on the cryptographic assumptions quantum computers threaten. Two tools carry the plan: leanVM, a minimal virtual machine purpose-built for SNARK-based signature aggregation, and leanXMSS, a hash-based signature scheme designed to replace BLS for validator attestations. Over 2028–2029, the data availability layer migrates from KZG commitments to STARK-based constructions in a sequenced set of forks.

One decision upstream of all of this is still open, and Buterin has called it potentially "Ethereum's last hash function." The candidates under consideration include Poseidon2 with additional security rounds, Poseidon1 and BLAKE3, each with different performance and security trade-offs. That choice will ripple through every later fork, which is why the sequencing clarification matters: you cannot finalize the quantum migration before you settle the hash function it is built on.

Four zones of today's infrastructure are vulnerable in the quantum scenario: validator signatures, user account signatures, the data layer's commitments and the execution layer's cryptography. The plan's answer is not to patch one zone but to replace the cryptography across all of them — the "blood replacement" metaphor researchers have used. That is also why the plan takes seven forks: replacing cryptography network-wide without breaking existing apps cannot be done in a single step.

What Most People Get Wrong About the 7-Fork Plan

Five misconceptions dominate discussion of this roadmap, and each one changes what a holder should do about it:

• Wrong idea number one: "Lean Ethereum is one upgrade." It is seven forks over roughly four years. Judging it by any single fork's features misses the design.
• Wrong idea number two: "The dates are fixed." The strawmap is explicitly a draft. Forks have already moved, and the November update clarifies ordering, not a guaranteed calendar.
• Wrong idea number three: "Apps will need rebuilding." Backward compatibility is a design goal. Existing applications are meant to keep working through the transition.
• Wrong idea number four: "Fees fall 10x for everyone." The projection covers a new scalable tier specifically. Base-layer fees for ordinary transactions are a different question.
• Wrong idea number five: "Quantum is a distant problem." The roadmap targets completion by 2029 precisely because researchers put the quantum threat around 2030. Waiting until the threat arrives would be too late to migrate.

The practical takeaway for ETH holders is undramatic, which is the point. There is nothing to migrate, no token swap and no action required by the roadmap itself. The risks to watch are execution risks: a fork that slips, a hash-function decision that stalls, or a consensus change that takes longer to test than planned. Those are visible in public developer calls months before they affect prices, which makes them trackable in a way that rumor-driven narratives are not.

5 Dates That Decide Whether the Plan Lands on Time

If you want to follow this story without reading every developer call, watch five milestones:

1. Glamsterdam ships. The next fork in line is the gateway: until it lands, the Lean sequence cannot start. Any further slip here pushes everything behind it.
2. Hegotá arrives in late 2026 or early 2027. As the expected last fork before the Lean phase, its timing sets the real start date for the rebuild.
3. The hash-function decision. Choosing between Poseidon2, Poseidon1 and BLAKE3 unlocks the quantum migration. A delayed choice delays the 2028–2029 forks.
4. The 2028 data-layer migration. Moving from KZG commitments to STARK-based constructions is the most technically demanding stretch of the plan.
5. L* completes Lean Ethereum by the end of 2029. The final fork is the test: seconds-finality, gigagas throughput, shielded transfers and post-quantum cryptography, all live, with existing apps still working.

Between those milestones, the market context matters too. ETH's 6.4% jump to $2,421 on November 4 outran Bitcoin's rebound, and our coverage of Ethereum Price: ETH Jumped 6.4% to $2,421 and Outran Bitcoin After the Midterms tracks the levels that decide whether that move holds into Friday's jobs report. A roadmap does not set prices in the short term — ETF flows, macro data and liquidations do — but a credible multi-year plan is part of why long-term holders stay through volatility like the 2026 drawdown.

What This Means for Ethereum's Competition

The roadmap also reads as an answer to Ethereum's rivals. Faster finality and 10,000 TPS on the base layer narrow the speed gap with high-throughput chains, while native shielded transfers address a feature privacy-focused networks have long offered. The teragas layer-2 target — 10 million TPS via data availability sampling — is the bolder claim: it bets that Ethereum's future is not winning every transaction itself but becoming the settlement and data layer other networks build on, at a scale no single chain matches.

That bet has a clear risk. If layer-2 networks capture the users and Ethereum's base layer only settles their data, ETH's value accrual depends on data and settlement demand rather than direct usage. The roadmap's gigagas base-layer target is the hedge against that outcome: it keeps meaningful activity on Ethereum itself. Holders tracking this story should watch both numbers — base-layer throughput and layer-2 data demand — rather than either alone.

Security is the other competitive edge the plan claims. A network that completes a post-quantum migration before the threat materializes can credibly market itself to institutions with decade-long horizons — pension funds, custodians and treasuries that cannot afford to rebuild positions later. That is a slow-burn advantage, not a price catalyst, but it is the kind of advantage that compounds.

Checklist: How to Track the Lean Ethereum Plan

• Follow the fork sequence, not just the headlines. Glamsterdam, then Hegotá, then the placeholder forks I* through L* — in that order.
• Watch the hash-function decision. Poseidon2, Poseidon1 or BLAKE3 — the choice gates the quantum migration.
• Separate projections from guarantees. The 10x fee projection covers one tier; seconds-finality and 10,000 TPS are targets, not delivered features.
• Ignore any "migration" or token-swap scheme. The plan requires no holder action; anyone selling a Lean Ethereum migration token is running a scam.
• Keep keys safe through every fork. Upgrades do not change wallet security — Best Crypto Wallets in 2026: 7 Compared After the $6.3B Binance Hack covers the setup that survives any upgrade cycle.

Frequently Asked Questions

What is Lean Ethereum?

Lean Ethereum is a draft multi-year direction for rebuilding Ethereum's core — consensus, data, execution, privacy and post-quantum security — through roughly seven hard forks targeted for completion by the end of 2029. It is the third major version of the protocol after the original architecture and the proof-of-stake transition.

Is the 7-fork roadmap official?

No. It is a "strawman" roadmap published by Ethereum Foundation researchers as a coordination tool. Dates and features remain subject to change, and Ethereum has no single authority that can impose a final roadmap on all stakeholders.

Will my ETH or apps be affected by the forks?

By design, no action is required from holders, and existing applications are meant to keep working through backward compatibility. There is no token swap and no migration step for users.

What are the five goals of Lean Ethereum?

Fast layer-1 finality in seconds, gigagas base-layer throughput of 10,000 TPS, teragas layer-2 scaling of 10 million TPS via data availability sampling, private layer-1 shielded ETH transfers, and post-quantum security by 2029.

When does the quantum threat arrive?

Researchers anticipate quantum capabilities becoming a real threat around 2030, which is why the post-quantum transition targets completion by 2029. The plan replaces vulnerable cryptography across validator signatures, user accounts, data commitments and execution before that window.

Does Lean Ethereum make ETH cheaper to use?

Tokens using a new scalable tier are projected to see fee reductions of more than 10x, but that is a projection for that tier specifically — not a guarantee for every transaction on the network.

Conclusion

Ethereum's clarified 7-fork plan is the most ambitious technical program the network has attempted since The Merge, and its honesty is its most underrated feature: the researchers say plainly that it is a draft, that dates will move, and that the fee and speed targets are projections. What is not in doubt is the direction — faster finality, far higher throughput, native privacy and quantum-resistant cryptography, delivered in seven disciplined steps with existing apps intact. The next test is the least glamorous one: Glamsterdam shipping, Hegotá following it, and the hash-function decision unlocking the quantum migration. Watch those five dates, ignore anyone selling a shortcut, and the roadmap will tell you itself whether Ethereum's rebuild is on track. This article is for information only and is not investment advice.

Sources: CryptoBriefing's November 5 report on the clarified fork plan, BSC News on the Strawmap framework, Decrypt's coverage of the seven-fork strawmap, and Foreck's Lean Ethereum roadmap overview.