Smart contract security auditor with focus on formal verification. Former old school sw dev who made the web3 leap ... uff-dah!

Joined February 2023
I don't like self-promotion, but ...😅 I'm happy with the work I did for Uniswap v4. Certora's public report highlights interesting properties proven, and 5 / 11 of them are mine. github.com/Certora/uniswap-v…
Replying to @Certora
@0x00ffDa proved a critical slippage control property which mathematically guarantees that users can never profit from position minting or exceed specified slippage bounds - key safety measures for Uniswap 🛡️
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A year ago "I'm using AI in my audits" = wasting time. Now, not using AI = wasting time AND likely missing bugs. Glad I got started and learned the fundamentals when I did ... and very glad I shifted to focusing on formal verification
Excellent work 💪 - Plamen is an amazing contribution to the security community 👏👏👏
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Your AI agent now has access to 20k+ smart contract audit findings. claudit - one-line install, works with Claude Code & Codex CLI, searches across all @SoloditOfficial findings, open source. Huge shoutout to @Cyfrin for opening the Solodit API 🫡 Link below 🔗👇
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"The best models can find 40-45% of High-severity vulnerabilities in audit contests. It may not sound impressive, but it's insane 🤯" Indeed!
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0x00ffDa retweeted
If you missed it the first time around, take a look because its back! 👀🚀♾ The blog post details the vulnerabilities found so far (spoiler alert) - skip straight to the website to find them for yourself. 👇
We're live with a new CTF! 🏁💰 Certora's DeFi security challenge is back. An ecosystem of interconnected protocols is open for you to attack. Full details and exploits by previous winners in the blog post. 👇
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0x00ffDa retweeted
Q) How can I learn to use @Certora Formal Verification? 1⃣ @CyfrinUpdraft Assembly & Formal Verification course (updraft.cyfrin.io/courses/fo…) 2⃣ Find Highs Using Certora Formal Verification (dacian.me/find-highs-before-…) together with my repo (github.com/devdacian/solidit…) which has simplified examples based on real code & bugs from our private audits 3⃣ @RareSkills_io Certora Book (rareskills.io/tutorials/cert…) 4⃣ @alexzoid FV Resources (github.com/alexzoid-eth/fv-r…) All are 100% free so if you want it, go get it!
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0x00ffDa retweeted
One more year at @EthereumDenver. Can't wait to show our new AI solution to all the devs to prevent all the bugs.
We’re thrilled to announce @SagivMooly, Chief Scientist at @Certora, as a speaker for ETHDenver 2026! Mooly Sagiv is a leading researcher in formal verification, applying mathematical rigor to smart contract security. In New BUIDL City, leaders like Mooly help show there’s somETHing for everyone to build and explore.
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Using AI to help you understand Yul code? @certora has a tool with guardrails to keep AI in check: Concordance. @summit_defi Buenos Aires
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Sage advice from @GalloDaSballo and @Montyly at @summit_defi Buenos Aires
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"Building is harder than breaking" so respect the hard work and openness of the builders even when you break the code. Among the great advice from @GalloDaSballo @summit_defi
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I love the concept behind @certora's Concordance, an elegant blend of AI and formal verification. Feed it a complex, assembly-optimized function: 1. It uses AI to generate a simplified, readable version. 2. It proves their equivalence. certora.com/blog/concordance…
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alright, after a week of work you can now fully simulate Safe transactions _locally_ before signing and verify the transaction hashes in parallel using my `safe-tx-hashes-util` with a single command (use the `--simulate flag` simply). This lets you check exactly how the transaction will execute before you sign. Everything is local. Everything what is executed is printed in the terminal. Transparency at all cost. You trust your RPC provider here so use a trusted endpoint or the preferred solution of running your own node. I know many still do not believe me but local-first, cli-based verification is the way to go. Not hosted UIs. My verification script is _one_ fucking Bash file. Everyone can audit it by looking at exactly one file. No dependency bloat.
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I joined this effort at @certora mid-stream and was proud to see it through to completion!
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The results of the $20,000 Formal Verification component of the Blend V2 competitive audit are in! Big shoutout to everyone who participated, and a huge congrats to @alexzoid for securing first place in the first-ever formal verification contest in the Stellar ecosystem! Much respect to @blend_capital and @StellarOrg for partnering with C4 to secure Blend V2 and the Stellar ecosystem — and to @certora for overseeing and judging the formal verification segment of this collaborative competition. Full list of winners👇
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The @Aqua_Token competition is live 🪐 Aquarius brings AMM functionality and liquidity management to @Stellarorg, powering the next wave of DeFi on the network. A dual-layer security approach: formal verification by @certora, paired with a high-signal Cantina competition. 💰 $110,000 USDC + $10,000 private pot 📅 Live now – June 18 🔗 Below
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Interesting news for formal verification 😮
I'm on my way to Denver, getting ready to release the Certora Prover code, the first formal verification tool for proving the high-level properties of executable code. It's a massive team effort, and it's happening tomorrow at 10 EST.
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0x00ffDa retweeted
@0x00ffDa proved a critical slippage control property which mathematically guarantees that users can never profit from position minting or exceed specified slippage bounds - key safety measures for Uniswap 🛡️
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0x00ffDa retweeted
100 @cantinaxyz invite codes?! 🤯 Yes, it's real. First 100 to register for the $100k formal verification part of the $1.25M @eulerfinance contest get a code. ✨ Retweet this tweet for bonus points. It's that simple. certora.com/contests/euler
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Love some of the creative marketing at #ETHDenver2024
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