iiinova — where your digital self keeps evolving

Reposted by Guillaume Claret

EF Ecosystem Support Program @ef-esp.bsky.social · 18/09/2025

✨ New work from our grantee @formalland.bsky.social, formally verifying ZK circuits for zkVMs! Their new blog post presents how to pretty-print the constraints from a Plonky3 circuit, ensuring their modeling is correct. formal.land/blog/2025/08...

formal.land

🥷 Pretty-printing of Rust ZK constraints | Formal Land

Many zkVMs are implemented in Rust, using the Plonky3 library to describe their circuits. While Rust is efficient and expressive for describing complex circuits, it is a complex language when it comes...

043 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 08/08/2025

We are currently formally verifying, in Rocq, the implementation of the Keccak hash function from Plonky3 in AIR. Here is a code extract in Rust:

111 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 31/07/2025

Here is our last blog post about the formal verification of LLZK circuits in Rocq. We present the reasoning rules, as well as how to apply them to verify that an example has no under-constraints. ✅ The link 👇

111 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 30/07/2025

Here is a new blog post on how we define the LLZK operator in the formal verification language Rocq, to assert that there are no under-constraints. LLZK is a zero-knowledge circuit language based on MLIR by Veridise. This work is funded by the Ethereum Foundation. Link: 👇

111 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 30/07/2025

Here is a blog post where we explain how we translate the LLZK zero-knowledge circuit language to the proof system Rocq, in order to formally verify such circuits. The main security property we are looking for is the absence of underconstraints. The link: 👇

111 0

Guillaume Claret @guillaume-claret.bsky.social · 13/07/2025

What I believe is the best way to make formal verification tools that scales is to first capture the intents of the programmers, but in a 💯 rational way. Interactive provers are then the best to express ideas/build on top of a solid foundation. To handle the repetitive parts: LLMs + automation.

000 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 13/07/2025

We are currently writing a whole EVM specification in the Rocq language that we prove equivalent to the original implementation in Revm. This specification is in idiomatic Rocq but follows the structure of the Rust code. It includes the gas and versioning! 👇

111 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 03/07/2025

One of our primary targets these days (months) is to make a functional specification for the Rust implementation of the EVM (Ethereum Virtual Machine) named Revm. We finally achieved that for the ADD instruction! Here is what it looks like: 👇

121 0

Guillaume Claret @guillaume-claret.bsky.social · 18/06/2025

I am happy to have safely arrived in Berlin for all the side events of the Blockchain Week and to discuss formal verification and ZK! I will go to NoirCon and ZK Hack. For now, at the WeWork to feel like home 😂

011 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 15/06/2025

A new blog post about our work to translate the Rust code of OpenVM to Rocq, with the aim of formally verifying that the circuits have no under-constraints: formal.land/blog/2025/06...

formal.land

🦀 Beginning of translation of OpenVM to Rocq | Formal Land

Here, we present our beginning work of translating part of the OpenVM code to the proof assistant  Rocq. The aim is to experiment around the formal verification of the zero-knowledge circuits of ...

011 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 26/04/2025

You want to formally verify your ZK circuits in a scalable way? This is what we are working on with Garden, our formal verification framework for circuits in Rocq. The link: 👇

111 0

Guillaume Claret @guillaume-claret.bsky.social · 21/04/2025

Vitalik, the founder of Ethereum, proposed the idea of migrating smart contracts from EVM to RISC-V, for performance reasons when going to ZK execution layers. But first, how does the EVM work? 🧵

100 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 19/04/2025

Our tool "coq-of-solidity" translates Solidity smart contracts to the formal language Rocq. What does it mean, and why is it important? 🧵

111 0

Reposted by Guillaume Claret

Atlas Computing @atlascomputing.bsky.social · 18/04/2025

Atlas Computing Symposium : Rust (Friday, May 2, 2025 - Ottawa, Canada) lu.ma/umi3g2wc Speaker highlight: Guillaume Claret is a security researcher and the founder of @formalland.bsky.social, a company specializing in the application of formal methods to critical code. #rustlang

033 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 17/04/2025

The reason we develop formal verification tools is to provide the best value for code audits. With our "coq-of-solidity" and "coq-of-rust" projects, it is possible to verify Solidity and Rust projects in an integrated manner in Rocq to prevent most vulnerabilities.

011 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 14/04/2025

Garden is our project to formally verify zero-knowledge circuits: formal.land/docs/tools/g... Reach out to us if you are interested in auditing your circuits! We are happy to contribute to the security of the advanced operations written in zero-knowledge technology.

formal.land

🌱 Garden | Formal Land

Garden is a formal verification framework that helps you verify your zero-knowledge applications with ease.

011 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 13/04/2025

We believe Web3 is the best space for the development of new auditing tools, as there is a unique combination of: - A strong pressure to get things right, - All the code is available as open-source, - The market is rather open to new players.

011 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 10/04/2025

Paris Blockchain Week 2025 is coming to an end. This was a great conference with many interesting side-events located along the river or the Louvres in Paris, for the best view. See you next year! 👋

011 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 08/04/2025

At Formal Land, we focus on providing the best level of security by developing advanced auditing solutions with formal verification. 🛡️ Hoping to see you at the Paris Blockchain Week event! 🥐

031 0

Guillaume Claret @guillaume-claret.bsky.social · 04/04/2025

A random idea to make a blockchain with "Proof of Useful Work": using ZK to verify some computations that are distributed to the network, acting as a cloud provider. The cost need to be competitive though compared to AWS.

000 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 04/04/2025

We are happy to attend the "AI and Math" day in Paris with a lot of presentations about the application of LLMs to formal proofs in Rocq or Lean, from experts in the field.

111 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 03/04/2025

We like to have numbers to measure our progress while coding. Here is the list of EVM instructions from the Rust Revm implementation that we have successfully translated to a typed version in Rocq: github.com/formal-land/...

github.com

121 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 02/04/2025

Having better support for constants in "coq-of-rust" is now done! ✌️ Another improvement: handling the native binary operators as normal functions to uniformize a lot of code on the proving side. Now, we reach a new difficulty: handling implicit coercions from &[T; N] to &[T] 🤔 A new task to do! 💪

131 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 01/04/2025

Rocq has this rarely known feature, and mathematicians hate it for that. (This is not clickbait 😆) Impredicative Set allows to quantify over types of values while still being at the same level. This leads to paradox for most mathematicians but not in Rocq! Here is what follows: 👇

123 0

Guillaume Claret @guillaume-claret.bsky.social · 31/03/2025

We should make tutorials and documentations based on the new image generator!

000 0

Guillaume Claret @guillaume-claret.bsky.social · 31/03/2025

Our working space with the anime painting mode in Paris :)

010 0

Reposted by Guillaume Claret

Selshevneren @selshevneren.bsky.social · 30/03/2025

Video of the Isar Aerospace "Full Spectrum" Launch at Andøya. 📸 video: @isaraerospace / @AndoyaSpace

920263 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 27/03/2025

We continue working on our coq-of-rust project to formally verify any Rust programs with the Rocq theorem prover. For critical applications, this enables making sure the code is free of vulnerabilities, given the right specification.

151 0

Guillaume Claret @guillaume-claret.bsky.social · 26/03/2025

I was happy to attend the ZKProof conference @zkproof.org , with many discussions with the zero-knowledge cryptographers and formal verification people! Interested to follow what happens with the verified verifier project!

010 0

Guillaume Claret @guillaume-claret.bsky.social · 19/03/2025

On this YouTube channel there are the videos of the discussions about formal verification for zero-knowledge by the Ethereum Foundation: youtube.com/@verifiedzkevm Today there were interesting presentations about verification for cryptographic primitives that should be online soon.

youtube.com

Verified zk(E)VM

A project by the Ethereum Foundation to accelerate the application of formal verification methods to zkEVMs

000 0

Guillaume Claret @guillaume-claret.bsky.social · 19/03/2025

We have to be honest and say when things are working well. Congrats to SpaceX and the US for the last landing of astronauts! www.spacex.com/launches/mis...

spacex.com

SpaceX

SpaceX designs, manufactures and launches advanced rockets and spacecraft.

000 0

Guillaume Claret @guillaume-claret.bsky.social · 13/03/2025

Live in four hours, the intro lesson of Thierry Coquand, creator of Coq/Rocq, in Colège de France in Paris: www.college-de-france.fr/fr/agenda/le... (in French, hopefully with subtitles; the buffet should be good also! 🙂)

college-de-france.fr

La théorie des types, de Russell aux assistants à la démonstration | Collège de France

041 0

Guillaume Claret @guillaume-claret.bsky.social · 11/03/2025

Here are two areas where we think innovation in formal methods can have more space to grow: - Building methodologies that use AI, which is good at generating simple and boring code with 95% correctness. - Leveraging the dependent types/unification engine of advanced provers like Rocq/Lean.

010 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 07/03/2025

Continuing the development of `coq-of-rust` github.com/formal-land/... , to formally verify Rust programs, we also discover bugs in our tool. Let us dive into the technical details to give an example. Today, we found an incorrect handling of the trait implicit generics in their implementations. 👇

github.com

GitHub - formal-land/coq-of-rust: Formal verification tool for Rust: check 100% of execution cases of your programs 🦀 to make applications with no bugs! ✈️ 🚀 ⚕️ 🏦

Formal verification tool for Rust: check 100% of execution cases of your programs 🦀 to make applications with no bugs! ✈️ 🚀 ⚕️ 🏦 - formal-land/coq-of-rust

131 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 04/03/2025

Our will with formal verification is to provide a complete solution for finding all vulnerabilities, before they become bug bounties or exploits. 💥

011 0

Guillaume Claret @guillaume-claret.bsky.social · 04/03/2025

In Rocq, there are three kinds of visibility for definitions: local, export, and global. Local definitions are specific to the current file; exports are explicitly activated with an "Import," and globals are transitively added following the dependencies. When does it matter? 👇

100 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 02/03/2025

Slides about the work we are currently doing to improve our formal verification tool for Rust named "coq-of-rust": formal.land/slides/2025-... The goal is to make a full functional specification of Revm, the Rust implementation of the Ethereum's smart contract interpreter.

formal.land

021 0

Guillaume Claret @guillaume-claret.bsky.social · 02/03/2025

Interesting to see that 3FS, the newly released file system by DeepSeek, got designed with the help of formal methods using the P system: github.com/deepseek-ai/... They seem to really use all the possible levers to get an AI better than the competition!!

github.com

3FS/specs at main · deepseek-ai/3FS

A high-performance distributed file system designed to address the challenges of AI training and inference workloads. - deepseek-ai/3FS

000 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 25/02/2025

Here is a page showing the status of our project to formally specify Revm (Rest EVM) in Rocq using "coq-of'rust'. In short, we have the typing of the ADD instruction and its dependencies. Now, we need to handle the memory of the rest of the instructions! formal.land/docs/tools/c...

formal.land

Revm Project | Formal Land

All the code of this project is available on github.com/formal-land/coq-of-rust/tree/main/CoqOfRust/revm

011 0

Guillaume Claret @guillaume-claret.bsky.social · 25/02/2025

Il y aura des cours de Thierry Coquand (créateur de Coq/Rocq) cette année au Collège de France ! Début le 13 Mars et libre d'accès sur place (Paris) ou en ligne. En Français uniquement ! www.college-de-france.fr/fr/chaire/th...

college-de-france.fr

Thierry Coquand - Informatique et sciences numériques | Collège de France

000 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 20/02/2025

Zero-knowledge circuits are very hard to get right without formal verification. That is why we have focused a lot on this area lately, building technologies to verify Circom circuits and the like.

121 0

Guillaume Claret @guillaume-claret.bsky.social · 20/02/2025

We believe that the formal specification of smart contracts, that is a requirement for good formal verification and audits, is still not fully developed and are going to push in this direction! The first target: defining "stealing" 🦹‍♂️

000 0

Guillaume Claret @guillaume-claret.bsky.social · 17/02/2025

There are so many features in the Rust language! Today we add support for casts from enums to integers in coq-of-rust. It is possible to define an explicit value for some of the fields. The other ones are implicitly incremented by one following the ordering.

010 0

Reposted by Guillaume Claret

Formal Land @formalland.bsky.social · 14/02/2025

We are happy we will be presenting our work on the formal verification of Rust programs with coq-of-rust at Ottawa in May, together with most of the other FV tools for Rust. This event comes with a push from DARPA for more Rust and formal methods in critical code. The link: lu.ma/umi3g2wc?tk=...

lu.ma

Symposium on Formal Methods for RUST at ICSE 2025 · Luma

The event Today, critical infrastructure is vulnerable to both malicious attacks and unintended failures, and these risks are expected to grow in the…

021 0

Guillaume Claret @guillaume-claret.bsky.social · 12/02/2025

Today's work: defining in Rocq enough semantics for memory allocation on stack so that we can prove this Rust file github.com/bluealloy/re... to be equivalent to a purely functional version in Rocq.

github.com

000 0

Guillaume Claret @guillaume-claret.bsky.social · 11/02/2025

Exciting progress on the formal specification of Revm, the Rust implementation of the EVM for Ethereum! 🚀 Yesterday, we completed adding type information to our Rocq/Coq translation of the gas file. This milestone means our process is now functional with real examples. Check out the details below:

110 0

Guillaume Claret @guillaume-claret.bsky.social · 10/02/2025

Today's work: adding more automation to coq-of-rust so that we can build a typed representation of github.com/bluealloy/re... in a very fluid manner. The end goal: having a framework to formally verify Rust code both at scale and for arbitrary code.

github.com

100 0