A decorative interactive background: the word “Gean” drawn as a mesh of linked nodes. Moving the cursor partitions the network; the nodes then reconverge on their positions.
Gean: The Lean Consensus Client for Ethereum’s Post-Quantum Future
Gean is the Lean Consensus client built in Go to help secure Ethereum as a foundation for the future of the global economy.
Supported by a grant from
Get Started
Run Gean locally. Follow the setup guide to install the required tools, build the client, and launch a local network. Start with three Gean nodes or explore a devnet with other consensus clients. Gean is currently for research and devnet testing.
Example commands: make build, then make run-devnet. The output illustrates a devnet session and is not live node telemetry.
Your node. In clear view.
Monitor and manage your Gean node with Gean Dira, a simple interface that puts node health, performance, and activity at your fingertips.
Built for Ethereum’s next chapter.
Simple by design
Clear consensus logic makes Gean easier to inspect, maintain, and improve.
Built for the quantum era
Gean implements Lean Consensus as it evolves toward validator signatures designed to withstand quantum attacks.
More diversity. Greater resilience.
Built by a small team from Africa, Gean diversifies Ethereum’s client ecosystem with a Go implementation of Lean Consensus.
Current status
PQ interop · Devnet progresspq-devnet-5
Active developmentGean tracks Lean Consensus devnet-5 alongside independent client implementations.
Implementation- Consensus fixtures generated from a pinned leanSpec revision.
- XMSS signatures through Go and Rust FFI.
- Three-node local networks and multi-client devnets.
Specification snapshot
- leanSpec
eca701efeb5931010fe63925cd203c9ee55b2dbc- lean-multisig-py
v0.0.9- leanVM
e2592df4e30fdddbbf8ae26a333116c68cec7026
For research and devnet testing. Gean is not a production Ethereum mainnet client.
Frequently Asked Questions
What is Gean?
Gean is an open-source Go implementation of Lean Consensus, Ethereum’s evolving post-quantum consensus redesign.
Is Gean running on Ethereum mainnet?
No. Gean is research and development software for Lean Consensus, not a production Ethereum mainnet client.
Who is building it?
Gean Labs, an engineering team based in Africa working on consensus and post-quantum infrastructure.
How can I contribute?
Start with the GitHub repository to explore the code, review issues, and find opportunities to contribute.
Team
Gean is developed and maintained by Gean Labs, a small team of engineers based in Africa working on consensus software and post quantum infrastructure.
We share a commitment to building an open, resilient, and decentralized Ethereum.
Big thanks to our contributors
We are grateful for our incredible contributors who bring their unique perspectives and expertise to Gean and the future of Ethereum.
