Minimalist, fast and modular implementation of the Lean Ethereum client written in Rust. Built by @class_lambda

Joined January 2026
ethlambda retweeted
This week's community calls are moving to Monday, July 13th. @ethrex_client goes live at 2:30 PM UTC and @ethlambda_lean at 3:30 PM UTC, back to back on X. Don't miss the updates from both teams.
1
3
5
768
Lean Ethereum is moving forward @leanEthereum. Great work by all the teams. I'm really happy with what @class_lambda has achieved with @ethlambda_lean.
📢📢📢 we are now devnet5 interop!!! 🚀🚀🚀 which is the culmination of the PQ consensus stack that we have been building and iterating on for @ethereum mainnet. PQ signatures are different from BLS signatures, the current signature machinery of ethereum. But BLS signatures are not Post Quantum secure because breaking elliptic curve cryptography is not an exponential problem for Quantum Computers. But ethereum is being build to last centuries not just decades. To that end @leanEthereum has been working on PQ signature cryptography using hash based signatures which are one time signatures (OTS), and not plainly aggregatable. Not only that they are huge (~1.5kb). So this entire challenge started the "devnets" initiatives of leanEthereum. Herein come's the "leanVM" the ZK rail which can aggregate such signatures and makes the entire PQ strategy possible. We have already been through devnet0 to devnet4, and now devnet5!!! Devnet5 is monumental in that regard, entire block will carry just 1 signature, all aggregated across packed attestations, block signatures (and anything else that will comeup when we backport the spec to mainnet ethereum) However this is one side of the puzzle, to maintain a stable node, one should be able to repack the attestations from a side branch especially if it moves justification and finalization. and Voila again with leanVM magic, we are able to split the attestations that we need to repack from the combined block signature and repack/re-aggregate them into a new block proposer wants to propose. This places leanVM as the centrepiece in the entire ethereum post quantum strategy. and the current aim of all the devnets we have been running is to bring a production level performance and demonstration of the capabilities. There are 8 clients that participate in these devnets each bringing value to the table to add stability and robustness (and chaos lol). Because we know: "There's many a slip between the cup and the lip" Goal of all leanEthereum clients is to remove them, one "slip" at a time (or multiple slips at a time lol). Spec isn't good enough, we need production performance, Spec and production design/performance are unequivocally tied. this isn't just a POC network, this is a proposal for ethereum mainnet! Thats why we have been rigorously running devents, slowly scaling the validators and subnets and discovering and alleviating the issues so that we end up with a production grade PQ signature scheme that ethereum deserves and needs. And this focus is now gonna magnify 1000X now that we believe we are on a spec that can deliver PQ for mainnet. And mind you, the time of need is gonna strike soon. We not only intend to solve this conundrum for ethereum but propose to even upstream to bitcoin so that we have a PQ standard this entire space deserves. And all that based on a humble but extremely powerful leanVM that makes the hashbased cryptography workable for the production grade systems like ethereum and bitcoin. PS: we are currently heavily focused on debugging and scaling devnet4 spec devnets while we have already started to run sims and preliminary interops for devnet5. So stay tuned for further progress that we leanEthereum teams have been cranking out with a steady but heavy dose ☕️. May be all matrix is just ☕️☕️☕️
4
6
2
84
5,726
We've been working on something similar with @LambdaClass, @alignedlayer and @polfinance_ since @EthCC, great work by @kubimensah and @titanbuilderxyz. This will change things very fast. The bid ask spread is the hidden tax every trader pays on every trade. Tighter spreads mean better prices, more volume, and deeper liquidity. Right now Uniswap owns DeFi, Binance owns CEX, and Solana ate part of Ethereum's lunch. If PropAMM brings spread compression to Ethereum onchain, things change entirely and Ethereum will become the best place to trade. Traders follow liquidity, liquidity follows better prices. Better prices come from tighter spreads. All of it gets contested: Uniswap's dominance, Solana's momentum, Binance's volume. PropAMM on Ethereum could redraw the entire power map of this ecosystem. As always, LambdaClass will work with anybody trying to make Ethereum win. As always, LambdaClass will work with anybody trying to make Ethereum win. We've already delivered @ethrex_client. We're about to deliver an open source Wallet-as-a-Service and LambdaVM, a RISC-V zkVM built with @alignedlayer. We're building @ethlambda_lean, a Lean Ethereum client. We're also launching stablecoins on Ethereum for LATAM with @lemonapp_ar. We've been helping build a new coalition in the block building world, and now we're entering DeFi.
1/3 PropAMM liquidity is now fully operational on Ethereum mainnet! Three makers are live in every Titan block, and quotes are already consistently beating Binance VIP9 taker fees for retail orders (trades <$1k).
3
12
1
92
18,351
ethlambda retweeted
New blog post out: Goldfish, the Forgetful Fork Choice. Ethereum's current fork choice rule, LMD-GHOST, works in production but is hard to reason about, hard to verify, and hard to extend. Goldfish is a proposed replacement, and it's being considered for the future of leanConsensus. We break down how it works.
2
4
12
1,018
Ethlambda keeps sailing at full speed. @leanEthereum is the future. Merged devnet-4 changes to main (deprecating devnet-3), added new devnet-4 metrics, and updated our Docker image. We continue running multi-client devnets and now have one finalizing with ethlambda, zeam, ream, grandine, and lantern. We also merged an external contribution removing an unnecessary clone. Thanks for the PR! Next: continue devnet 4 interop debugging 🔥
6
33
1,968
ethlambda retweeted
We’re going live tomorrow on X with two Community Calls, sharing updates from both teams. @ethrex_client goes first at 2:30 PM UTC, followed by @ethlambda_lean at 3:30 PM UTC. Tune in to hear what we’ve been building and what’s coming next.
2
4
383
ethlambda retweeted
A follow-up to our post on building a post-quantum Ethereum client. Here we detail @ethlambda_lean's minimalist architecture.
1
5
1
8
1,844
ethlambda retweeted
lean Ethereum
@leanEthereumFeb 2
The drums of quantum computing are getting louder. An ambitious roadmap backed by concrete designs and 30+ years of cryptographic research is already underway. Learn more at leanroadmap[.]org."
38
66
15
359
152,360
Introducing @ethlambda_lean : A Lean Consensus Client for Ethereum's Next Era. As Ethereum prepares for its most ambitious consensus layer redesign since the Merge, client diversity will be more important than ever. ethlambda is our contribution to the future of Ethereum.
3
2
46
2,097
ethlambda retweeted
New blog post! We present our latest project @ethlambda_lean, an Ethereum Lean Consensus client.
2
7
25
2,046
We've integrated attestation verification into the @ethlambda_lean node, with fixture testing to ensure correctness. We already have most tests passing, with failing cases being worked on. We also added CLI options to streamline node configuration. Next: attestation production.
13
2
1
16
1,313
ethlambda @ethlambda_lean is moving fast forward. it's a minimalist, fast and modular implementation of the @leanEthereum written in Rust. please follow the account and give it a star in github.
10
4
26
1,312