@verityclient

The Provable Consensus Client — a formally verified @leanEthereum client built with @leanprover

verityclient.com/
Joined April 2026
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We get step to next stage 🧙 to prove the correspondence of spec and implementation with Aeneas github.com/NyxFoundation/ver…

GitHub - NyxFoundation/verity-aeneas-proofs: Aeneas-generated Lean semantics and correspondence...

Aeneas-generated Lean semantics and correspondence proofs for Verity against formal-leanSpec - NyxFoundation/verity-aeneas-proofs

github.com
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For examaple, We are prototyping Option 4 inspired by evm-asm✨ github.com/NyxFoundation/cl-…

GitHub - NyxFoundation/cl-asm: Experimental design for a Lean 4-verified RISC-V consensus-layer STF...

Experimental design for a Lean 4-verified RISC-V consensus-layer STF prototype - NyxFoundation/cl-asm

github.com
Verity@verityclientSep 26
Replying to @verityclient
@verityclient is currently using Option 2, but with the discovery of several alternative approaches, it is considering a change in architecture.
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@verityclient is currently using Option 2, but with the discovery of several alternative approaches, it is considering a change in architecture.
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“Formally verified client” doesn’t automatically mean the binary users run is verified. This article explores where proofs end, what remains in the TCB, and five paths toward E2E verification ethresear.ch/t/ethereums-tcb…

Ethereum's TCB, Part 1: The client

by George and Kev. Thanks to Alex Hicks for the many stimulating discussions that shaped this post. Motivation It’s 2026 and AI has been breaking the Internet lately. Formal verification (FV) seems...

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We experimentally integrated this into Verity through a C ABI github.com/NyxFoundation/ver…

feat: evaluate Lean SSZ hash tree roots by adust09 · Pull Request #41 · NyxFoundation/verity

Summary vendor the Lean 4 SSZ implementation from Add a Lean second implementation, proved and checked against this one ethereum/ssz-specs#132 at commit 463a311d61353cc83de04e1c7d71834b9f354784 ad...

github.com
Thomas Coratger@tcoratgerSep 15
We just merged Lean4 implementation of SSZ! Still a huge amount to iterate on, especially making the Astra-generated proofs more human-readable. But Lean/Python cross-testing in CI has already caught a few subtle bugs in the Python spec :) github.com/ethereum/ssz-spec…

Add a Lean second implementation, proved and checked against this one by tcoratger · Pull Request...

A second implementation of SSZ, in Lean 4, that this one is checked against. Why a second one A reference implementation is only as right as its tests. Two independent implementations disagree loud...

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2/10 Formal verification mathematically proves that both the specification and the code behave correctly. With @leanprover we can catch safety issues that ordinary testing often misses. lean-lang.org/

Lean Programming Language

Lean is an open-source programming language and proof assistant that enables correct, maintainable, and formally verified code.

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1/10 Do you know Decoupled Consensus? It resolves multiple problems long faced by @ethereum ’s consensus algorithm. We are formally verifying it in @leanprover ethresear.ch/t/unblocking-fa…

Unblocking faster finality with decoupled consensus

Thanks to the EF Consensus team for discussion and comments In the current consensus protocol, the timelines of block production and finality are coupled. A large committee (consisting of 1/32 of the...

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