Cartesi Official Announcements

Cartesi Weekly is live once again, bringing a recap of the latest updates 🐧 Cartesi Rollups Contracts v3.0.0-alpha.7 is out. If an app gets foreclosed, eligible ETH, ERC-20, ERC-721, and ERC-1155 deposits that haven't finalized can now be refunded to the sender, and claim submissions run through extra machine checks that catch invalid claims earlier instead of later. The toolchain also kept getting leaner: Having already dropped one dependency in alpha.5, this release drops another, leaving a much simpler setup with fewer moving parts to manage. Here's a dedicated thread if you want the full scoop: → https://x.com/cartesiproject/status/2087161705415811160 Following closely, v3.0.0-alpha.8 shipped too. It makes contract source code easier to verify on public explorers, moves a core verification component to a stable release, and switches how deployment info is stored to a format that's simpler for tools to read automatically, with a clear migration path so nothing breaks in the meantime. The devnet also picked up a more realistic test token, making it easier to try out withdrawal flows the way they'd actually work in production. Check the full release here: → https://github.com/cartesi/rollups-contracts/releases/tag/v3.0.0-alpha.8 But these aren't the only releases: Cartesi Machine Emulator v0.21.0 has also shipped. Documentation is back and expanded, with a new section walking through how the emulator performs fraud proofs. Apps can now persist their state more efficiently, the CLI can handle more of the fraud proof workflow on its own, and every state transition now ends in a clear, provable outcome. → https://github.com/cartesi/machine-emulator/blob/main/doc/README.md Plenty more shipped alongside it, but expect full details to be unpacked in an upcoming post. Keep an eye on this feed, or if you're among the tech connoisseurs, dive directly into GitHub: → https://github.com/cartesi/machine-emulator/releases/tag/v0.21.0 Throwback to the Dar Blockchain X Space: listen to a snippet of Shaheen Ahmed breaking down Cartesi's approach to offchain execution with Ethereum as the trust anchor, and why provable Linux is the real differentiator: → https://x.com/cartesiproject/status/2087886429913551165 This week's shoutout goes to our Reddit channel. Head to r/cartesi for updates, tech deep dives, release breakdowns, and any community questions, or tag u/cartesi in any related thread and we'll jump in. → https://x.com/cartesiproject/status/2087524807911079981 We can definitely say all these developments are in line with how we opened the week: Ethereum keeps it secure, fraud proofs keep it verifiable, Cartesi keeps it possible. → https://x.com/cartesiproject/status/2086799493459230844 That is all for now. Keep building, and in between, touch grass and enjoy the weekend. Repost: https://x.com/cartesiproject/status/2088249805483147641

Why Linux changes what you can build and how Cartesi approaches offchain execution with Ethereum as the trust anchor? By keeping everything provable and using its fraud-proof system in disputes to ensure correctness. Hear Shaheen Ahmed explain it on Dar Blockchain’s X podcast. Repost: https://x.com/cartesiproject/status/2087886429913551165

Somewhere on Reddit right now, someone is deep in a thread arguing about rollup architecture at 2am. Good news: they don't have to do it alone. Tag u/cartesi and we'll jump in, or head straight to r/cartesi for tech deep dives, release breakdowns, or Q&As: https://www.reddit.com/r/cartesi/ Repost: https://x.com/cartesiproject/status/2087524807911079981

Last week brought us Cartesi Rollups Contracts 3.0.0-alpha.7. Safer deposits, stricter claims, and a lighter toolchain. Let’s dive into what’s new under the hood in this latest release and why it matters. 🧵↓ 1/ Deposit refunds are here. If an app is foreclosed, eligible deposits that haven’t been finalized can now be returned to the sender. This now covers ETH, ERC-20, ERC-721 and ERC-1155 deposits. One less way to lose money by accident. 2/ Deposit finalization is now tracked more explicitly, while fee-on-transfer ERC-20s are rejected. Together, these changes improve accounting around deposits and refunds, helping prevent mismatches that could leave apps underfunded or insolvent. 3/ Claim submissions now run through extra machine checks. That tightens security around the exact step where correctness matters most, catching invalid claims earlier instead of later. 4/ The toolchain just got lighter. We sunset Cannon in alpha.5, and now we've sunset the cartesi/rollups npm package too. rollups-contracts depends on Foundry and POSIX utilities only. Fewer dependencies for integrators to manage, less to break. 5/ Compiled artifacts and deployment addresses are still published on GitHub releases, so you can still grab everything easily. Source still ships through Soldeer: forge soldeer install 'cartesi-rollups-contracts~3.0.0-alpha.7' 6/ Also in this release: type-checked deployment scripts (catch deploy bugs before they hit chain), a smaller curated set of published artifacts (less clutter to sift through), foreclosure now emitted as a single event (easier to track onchain), and a bump to Foundry 1.5.1. 7/ Full changelog: https://github.com/cartesi/rollups-contracts/releases/tag/v3.0.0-alpha.7 So devs, dive into the release on the Rollups channel on Discord, test the changes, and drop any feedback: https://discord.gg/cartesi Repost: https://x.com/cartesiproject/status/2087161705415811160

Ethereum keeps it secure. Fraud proofs keep it verifiable. Cartesi keeps it possible. Monday, let's build the part that used to be impossible. GM! Repost: https://x.com/cartesiproject/status/2086799493459230844

It's a wrap on July, and Cartesi kept building in the open. The fraud proof system picked up a safety upgrade with PRT claim staging, dev tooling got reorganized, media appearances continued, and our penguin ventured from Kuala Lumpur to ETH birthday. → https://cartesi.io/blog/ecosystem-updates-july-2026 Repost: https://x.com/cartesiproject/status/2085711559528157397

So what's it like building DeFi logic on Cartesi with Python, Rust, and other mainstream tools, and how does the workflow feel coming from Solidity? Hear it straight from dev advocate Shaheen Ahmed in the latest X Space by Dar Blockchain. Got questions? Shoot them our way! Repost: https://x.com/cartesiproject/status/2085351220265496943

What's a DeFi idea you scrapped since it needed real compute, not just more gas? Complex risk models, ML-driven strategies, oracle-heavy logic: the EVM makes them expensive or nearly impossible. A Linux runtime doesn't. Tell us what you scrapped. We might already be running it. Repost: https://x.com/cartesiproject/status/2084988310288826861

From attention to trust? Don’t reinvent the wheel. Stand on the shoulders of giants. Use Ethereum as the settlement layer, integrate academically researched fraud-proof algorithms, and make everything you build verifiable. Hear João Garcia on Web3CMOStories by by Joeri Billast. Watch the full interview: https://www.youtube.com/watch?v=slts4Q9fqKo Repost: https://x.com/cartesiproject/status/2084625941486338367

Why should Web3 be any different? GM! Props to ItsFOSS for the inspo. Repost: https://x.com/cartesiproject/status/2084263311965872287

Friday again, and this takes us to another Cartesi Weekly for you to catch up on what happened across the ecosystem this week 🐧 A full Linux environment runs inside a Cartesi rollup, which means code isn't squeezed to fit a constrained execution environment. That's the whole unlock, and that's how we started the week: → https://x.com/cartesiproject/status/2081726068197867826 Developer advocate Shaheen Ahmed joined Dar Blockchain's X Space to talk through Cartesi's role in DeFi, including why building with mainstream legacy software onchain expands what's possible while making the infrastructure even more secure. Listen to the recording if you missed it: → https://x.com/cartesiproject/status/2082483594606329892 Youssef Seghaier put together a solid recap thread if you want a quick scoop: → https://x.com/YoussefS721/status/2083010835639578883 Cartesi was on the ground at Malaysia Blockchain Week in Kuala Lumpur this week, walking the venue and talking Linux-powered rollups (or massage lore from previous hackathons) with anyone who stopped by. Web3 in Southeast Asia is clearly still building, and the energy in the room backed that up. See what contributor Cynthia Gliga shared: → https://x.com/CryptoCyn/status/2082349659771818269 Ethereum turned 11 this week, and Cartesi marked it in the way it knows best: the penguin walking energetically through the Infinite Garden, bringing more compute power and more design space to Ethereum's security and decentralization: → https://x.com/cartesiproject/status/2082813992771416195 To celebrate together with everyone else in the ecosystem, we minted CTSI onto EthLabs' collaborative onchain canvas, an 11x11, 11-color grid that grew square by square as the community drew through each other's links. See it here: → https://x.com/cartesiproject/status/2083105082774839536 You can still participate yourself too, let's see what you create: → https://x.com/ethlabs_org/status/2082835818130063360 That is all for this week. Now let's all have a good weekend. Repost: https://x.com/cartesiproject/status/2083175617001042048

Happy birthday, Ethereum! Proud to be building for the long haul in this ecosystem. More compute power and more design space, thanks to a full Linux OS onchain, all while inheriting Ethereum's security and decentralization. Perfect match. Here's to many more years together. 🥂 Repost: https://x.com/cartesiproject/status/2082813992771416195

Want to learn why complex DeFi applications keep suffering from exploits onchain? Our developer advocate Shaheen Ahmed is joining Dar Blockchain for a live X Space session tomorrow, July 29th at 4 PM UTC+1. Tune in to learn about Cartesi's role in DeFi, what it brings to the table, and why building with mainstream legacy software onchain expands the design space while also strengthening security. Set your reminder and join the conversation live: https://x.com/i/spaces/1pKkOOgNlpmKj?s=20 Repost: https://x.com/cartesiproject/status/2082087681711120392

GM from Cartesi, where actual Linux runs inside a rollup, bringing full programming languages, battle-tested libraries, and no more EVM limitations. Complex logic, verifiable on Ethereum. That's the unlock. Now let's build. Repost: https://x.com/cartesiproject/status/2081726068197867826

It's Friday again, it's Cartesi Weekly, and here's the roundup of what happened across the ecosystem over the last few days 🐧 The World Cup is over, but the real game never stops: we have new goals and new commits alongside fellow builders. Felipe Argento and Brandon Isaacson are busier than ever. Follow them, and if you see this post, make sure you follow our penguin as well, aka the official account: → https://x.com/cartesiproject/status/2079190802769825994 The everlasting question: why does Linux onchain matter? It already runs underneath most of what gets built, and that's likely how blockchains get adopted too: invisibly, as infra nobody realizes they're using. Joao Garcia unpacked it on the latest Web3CMOStories, hosted by Joeri Billast. Give the full episode a watch: → https://youtu.be/slts4Q9fqKo Itsfoss put it well this week: free software means freedom. And we took it forward: with Cartesi, that freedom extends onchain. Build with whatever programming languages and software stack you already use: → https://x.com/cartesiproject/status/2079913353930252761 Co-founder Erick de Moura added to it too: Linux gives you freedom to write anything, Ethereum gives you freedom to run without trust, Cartesi gives you both at once: → https://x.com/erickdemoura/status/2079949398843462014 New channel alert: Cartesi is officially on TikTok. Bite-sized videos from contributors, quick tech explainers, podcast moments with the team, and more on the way. Go find us, hit follow, and tell us what you want to see next: → https://www.tiktok.com/@cartesiproject/video/7662766138903760142 Huge TVL sitting exposed to hacks is a problem. One party holding the power to walk off with it is another. Felipe Argento broke down why Cartesi's Emergency Withdrawal mechanism (recently shipped, remember?) solves both, and why it beats a security council model. Must read: → https://x.com/felipeargento/status/2080301432926863758 tl;dr? Contributor Guilherme Dantas summed it up for you in one sentence: If a Cartesi app ever breaks, funds will be recoverable from the last finalized app state. See here: → https://x.com/guidanoli/status/2080350063964868997 That's all for this week. As always, all tech discussions are on Discord, so catch us there: → discord.gg/cartesi Enjoy the weekend. Repost: https://x.com/cartesiproject/status/2080638902407455117

It's official: we're now on TikTok. Bite-sized videos from our contributors, quick explainers on the tech, podcast moments with the team, and some fun in between. Go explore, hit follow, and tell us what you want to see next: https://www.tiktok.com/@cartesiproject/video/7662766138903760142 Repost: https://x.com/cartesiproject/status/2080277071528697916

With free software, you have freedom. With Cartesi, you have the freedom to build onchain using the programming languages and software stack of your choice. Props to ItsFOSS for the inspo. Repost: https://x.com/cartesiproject/status/2079913353930252761

Why Linux onchain matters? It already runs underneath most of what's built. That's likely how blockchains get integrated going forward too: invisibly, as infra we don't realize we're using. Plus, it gives all devs access to blockchain capabilities they couldn't tap into before. Hear all about it from Joao Garcia on the latest Web3 CMO Stories, hosted by Joeri Billast. Full episode here: https://www.youtube.com/watch?v=slts4Q9fqKo Repost: https://x.com/cartesiproject/status/2079552757355434322

GM, Cartesians! The final whistle has blown, but we’re just getting started. New week, new goals, new commits. Let’s cook something worth cheering for, just like fellow builders Felipe Argento and Brandon Isaacson are doing right now. IYKYK. Follow along 👀 Repost: https://x.com/cartesiproject/status/2079190802769825994

It's Friday again, so you know it's time for Cartesi Weekly 🐧 New week, same mission: ship the DeFi infra the EVM can't. That's how Monday opened, and the week followed through: → https://x.com/cartesiproject/status/2076652643238502667 Recently, Joao Garcia sat down with Joeri Billast on Web3 CMO Stories to talk about the hidden costs of building DeFi inside the EVM. His take: you meet that rigor needed onchain by inheriting efficiency and security from battle-tested primitives, then layering in trust minimization and verifiability. That combination is the real unlock. Check the podcast for the full scoop: → https://x.com/cartesiproject/status/2077015827644322015 This week, we went down memory lane and pulled a Throwback Thursday that took us back to 2020, when we first made the case for bringing Ethereum's guarantees to real-world computation. Six years later, the argument hasn't aged a day: → https://x.com/cartesiproject/status/2077733239003996242 And while we're at it, a throwback to our flagship builder Felipe Argento's two recent articles. Must-reads for anyone who's following our former Cartesian who decided to build with the infra he knows best. Let’s dive in: Decentralization alone doesn't attract users or institutions. What moves things forward is fast, unapologetic, centralized actors building on top of decentralized infrastructure. Applied to Cartesi: the tech stack stays decentralized, but growth comes from intentional builders at the edges, each with their own reasons, collectively strengthening the shared infra. → https://x.com/felipeargento/status/2074856723869737201 Crypto's real-world impact has come mostly through pressuring TradFi to improve, not through decentralizing finance itself. That's not enough, without real decentralization and accessibility, crypto loses its edge. The fix: apps that feel like TradFi but run decentralized under the hood, which is exactly what Cartesi's appchain rollups enable. → https://x.com/felipeargento/status/2072342871047274695 Lastly, as always, catch our tech contributors on Discord if you have any questions: → discord.gg/cartesi Now get ready to touch some grass this weekend. Onward to next week for more shipping.