✨ Magical moments at EthPadThai's @EFDevcon side event! 🥢🍤🍋 Huge gratitude to @VitalikButerin, our talented Thai builders, our wonderful community, and our lovely supporters @Infinit_Labs @ClvVentures @impossible_ Building the future of Web3 in Thailand, one step at a time 🇹🇭 #EthPadThai #Ethereum #DevconSEA

Most SSZ libraries are tested against the spec. I built one where the core properties are formally proved, in Lean 4. It also passes the full upstream test corpus. SSZ is how Ethereum serializes and Merkleizes its data — if hash_tree_root or deserialize is wrong, you get the kind of bug that can split the chain. For this reason I wanted something that is not only tested against the spec, but also proved. Formal verification. The library is called SizzLean. I proved three theorems: roundtrip (decode after encode returns the same value), non-malleability (two different values cannot produce the same encoding), and a size bound. They hold for the fixed-size SSZ types: the integers, bool, fixed vectors and lists, and containers built from those. I have not proved them yet for bitvector, bitlist, and variable-size containers. So this is a base, not a finished proof. Trust boundary. The only thing I assume without proof is the C SHA-256 function, declared as three named Lean axioms. You can list the full trust footprint with one grep, or with #print axioms on any theorem. Nothing else is taken on trust. Two backends. The same spec runs on a fast cached backend, used for execution and for running the test vectors, and on a pure backend, used for the proofs. I put the hash function behind a typeclass, so SHA-256 can be replaced by Poseidon2 or a post-quantum hash without changing the containers, the proofs, or the cache. Conformance. On top of the proofs, it runs the official ethereum/consensus-spec-tests on both presets: ssz_generic: 2188 / 2188 ssz_static (mainnet): 1585 / 1585 ssz_static (minimal): 38991 / 38991 This covers every fork from Phase 0 to Gloas, including the new ePBS containers. I also commented the code to be read. If you want to learn how SSZ works, or how to do this kind of work in Lean 4, you can follow it from top to bottom. The verification was done with heavy help from an AI coding agent. With Lean this does not change the result: the kernel checks the proof, independently of who wrote it. I work on specs and test vectors at the Ethereum Foundation, on the STEEL team. This is a personal project. The next step is to widen the proofs toward the remaining types. Repo and full details: github.com/etheorem/etheorem…

Our friends from @invisiblgarden @OpenBuildxyz and @coset_io are cooking an amazing day in Devconnect focused on Asian Ethereum projects and communities

We're excited to share that @VitalikButerin has confirmed he’ll be joining ETHShanghai 2025 virtually! 🥳 We’re also honored to welcome the @ethereumfndn’s Co-Executive Directors, @hwwonx and @tkstanczak. Can’t wait to hear their fresh perspectives and forward-thinking ideas! 🎉

⛰️ Join us on Oct 1 in Singapore for the ShanHaiWoo Celebration Ceremony with Zucity friends! Reflect on a month of building, hear from Vitalik Buterin on the Future of Zucity community popups worldwide , connect with global Web3 builders, and celebrate standout projects. 📍 Location: Singapore 🗓 Time: Oct 1, 2025, 13:30 – 18:00 (SGT) 🔗 RSVP: luma.com/qzpati2a Power By 🤝 Organizers:@DRK_Lab @HashKey_Capital @alt_layer @theBBFund @ethereum_sg 🧑‍🤝‍🧑 Sponsors:@brevis_zk @HSKChain @4seasDeSoc 🏠 Venues:@tencentcloud & The Digital Lab Let’s build the future Web3 together! 🌍

If there’s one thing you need to know today, it’s this 👇 Talent is everywhere. Opportunity is not. This is why Invisible Garden exists. 🌱 – For deep learners looking for a quiet space to trade noise for focus. – For mentors looking for a chance to make impact at scale. A chance to shape, guide, and teach. – For sponsors who want to support innovative projects and public goods in Ethereum, ZK, Cybersecurity, and AI. 🚪 Applications for edition 2 are closed. But the garden is still open to sponsors ready to back the next wave of builders. Apply to be a sponsor: docs.google.com/forms/d/e/1F… See more information here: invisible.garden/

🚀 ¡Atención Builders! @invisiblgarden Buenos Aires 2025 es una pop-up dev city de 7 semanas: centrada en Ethereum, ZKP, Inteligencia Artificial y Ciberseguridad. 🗓 27 de octubre – 16 de noviembre 🎓50 becas disponibles que incluyen alojamiento y más beneficios 🔗 ¡Aplica tienes hasta el 30 de agosto! Info: https://invisible.gardenSolicitudes: invisible-garden-2025.devfol…

I am training hard to debate with some of the brightest minds at the Ethereum Protocol Day this Sunday organised by @0xpantarhei and @DappLearning . Looking forward to bleeding edge ideas cooking on Ethereum and of course the best food in the world!!

Ethereum Protocol Day is happening next weekend on 24 Aug, join us for a day of learning about the technical aspects of Ethereum development with guest speakers from around the Asia region. Also hosted by @Dapp_Learning @stayzookie Announcing our topics and speakers👇 (1/6)

Donut Early Pass is here. Donut is the closed beta for devs who don’t sleep.…mmm Donuts! 🍩 Be one of the first to grab it and get access to 👇

After last year’s unforgettable edition in Chiang Mai, Invisible Garden — a traveling academy for Ethereum developers — is now heading to Buenos Aires. 🇦🇷✨ 🌿 The next Invisible Garden is blooming. 3-week residency for Ethereum builders focused on ZK, AI & security — guided by 40 top-tier mentors. We’ve designed it as a home for neurodivergent talent, public goods builders, and anyone who needs focus to thrive. 📍 Buenos Aires 📅 Oct 27 – Nov 16 (right before Devconnect) 👥 50 builders 🎓 World-class mentors This is not a conference. Not a hacker house. Not a vibe farm. If you're serious about learning and eager to build real-world solutions on Ethereum, ZK, AI & security — this is for you. ✅ 100% free for developers 🏡 Free co-working space & opportunity for accommodation scholarship More details →invisible.garden Apply now → invisible-garden-2025.devfol… Sponsor opportunity → forms.gle/QzVjt1vdQNA6bkvR6 #InvisibleGarden #DevBeforeDevconnect #Ethereum

Great opportunity from our friends!! 👇

Invisible Garden community 🍃 Meet up at Berlin 🇩🇪 Gear up for Buenos Aires 🇦🇷 Stay tuned 🔔

Join us for the ETHPADTHAI Meet Up on Friday, May 30th, from 8:30 PM to midnight! 🙌lu.ma/74gxe2wb

Fridays are for proving you're old enough… without ever saying your age 🔐 Just wrapped a ZK age verifier using Rust SP1 zkVM — math > secrets. Next up? Proving if an image is AI-generated because in the future, proof > perception 🤖🧠 @invisiblgarden cc; @_rutefig @leolarav

Our initiator @leolarav joined a meaningful panel at Hong Kong Web3 Festival: “Real-World Adoption – Entering a New Era of Application.” In Web3, applications aren’t just use cases — they’re bridges between innovation and real-world impact. Leo shared how ZK and Solidity developers are building real, scenario-driven applications that shaping the next wave of meaningful Ethereum adoption. Huge thanks to @festival_web3 and @EthereumAsia for the invitation and for spotlighting what truly matters — making Web3 useful, usable, and universal 🌱

Leo @leolarav , Initiator of EthPadThai @ethpadthai and Invisible Garden @invisiblgarden & Software Engineer at EF @ethereumfndn ,will bring must-hear insights on #Ethereum’s next wave. 🔥 Claim your free ticket before it’s gone: lu.ma/ETHAsia #ETHAsia

🚨 Invisible Garden Costa Rica 2025 - Important Updates 🚨 We’re refining our program to maximize impact for the Ethereum & Web3 community in Latin America! 🌎✨ 🔹 New Agile Format – A 4-week immersive experience for deep learning & collaboration. 🔹 LatAm Focus – Prioritizing builders from the region to strengthen the Ethereum ecosystem. 🔹 Updated Schedule – 1 online prep week, 2 core building weeks, 1 optional social week. 📅 New Dates: 🖥️ Online Week: May 5 - May 11 🔨 Core Weeks: May 12 - May 25 🌴 Optional Social Week: May 26 - June 7 ⏳ Deadline Extended! Apply by March 21st → invisible.garden/apply 📖 More Details: invisible.garden/announcemen… Let’s build together in Costa Rica! 🇨🇷🔥 #Ethereum #Web3 #InvisibleGarden

1) Hello friends 👋 We're launching Local Ethereum, a newsletter exploring the geo-story of Ethereum. localethereum.beehiiv.com/p/…

And I’ll be forever grateful to meet this amazing people, hard workers 🚀

Here with @invisiblgarden ‘s @jernkun and @_rutefig at @ETHiopia____ !!