@geanclient

A @LeanEthereum consensus protocol that is simple enough to last

 world computer
github.com/geanlabs/gean
Joined January 2026
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We have completed devnet-4 development and currently participating in the devnet-4 multi-client interop run. Here are some of the notable implementations done for devnet-4
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Lately we have been working on optimizing gean, with focus on our aggregation pipeline and also testing under long running devnets with other clients. Here are some of the things we have done so far.
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- Fixed finalization pruning order. Database pruning now identifies and deletes obsolete states and losing-branch block data before fork choice removes those roots.
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More updates coming shortly.
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Ethereum’s future is being built from Africa too. GEAN is now supported by the Ethereum Foundation to continue our work on Lean Ethereum consensus. A Go client. Built from Africa. Contributing to client diversity and Ethereum’s post-quantum future. We’re proud of this one.
EF Ecosystem Support Program@EF_ESPAug 18
Q2 2026 carried forward our focus on advancing Ethereum's resilience and capabilities, with support for work across ZK proofs, client diversity, FV, and open-source tooling. Explore the projects @ethereumfndn supported in the Allocation Blog post here: blog.ethereum.org/2026/08/18…
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- On the performance side, we have optimized the prover/verifier build to cut signature verification CPU, fixed a recovery bug where a node could get stuck after forking from a peer.
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Still work to do, but interop is solid and the client keeps improving. More updates soon.
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Over the past few weeks, we've been steadily bringing Gean in line with the latest protocol developments, improving correctness, tightening interoperability, and preparing for broader multi-client testing.
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At the same time, we have been making efforts to make gean faster, more reliable and more efficient with every iteration.
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Thanks for sticking with us. More updates are coming soon. Stay tuned
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Gean is now passing all Lean Ethereum Hive test suites (200/200), the official conformance tests that run Lean Consensus clients against the spec.
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This includes interop, rpc-compat, reqresp, gossip, validation, fork-choice, state-transition and signature verification suites.
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A major milestone for Gean and another step toward production-grade Lean Ethereum consensus infrastructure in Go. Live dashboard: hive.leanroadmap.org
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