Gabriel Rosa | gabehellz.eth

@Hashlock_ Thanks 🙏

@gabehellz Great work!

So I've started writing some smart contracts in Solidity for practicing more, with no AI, only me and my ol' good Emacs. You can check it out here: github.com/gabehellz/crow… This week goal is creating 4 more Crowdfunding contracts, adding more complexity on each one.

@rahvax Thanks bro 😁

@gabehellz Gj! 🤓🤓🤓

@rosarioborgesi @buidlguidl @OpenZeppelin Niceee, Rosario! Keep doing it 🔥🔥🔥Are you planning to do the Damn Vulnerable DeFi challenges after you finish Ethernaut?

📍Progress on my journey to become a Solidity developer: ✅ Cyfrin Updraft courses (Solidity fundamentals → Advanced Foundry) 👉 profiles.cyfrin.io/u/rosarioborge… ✅ @buidlguidl Speedrun Ethereum challenges 👉 speedrunethereum.com/builders/0xce6… ⚙️Next step: @OpenZeppelin Ethernaut

@gabrielrvita Thx bro 🤝

@gabehellz Well done! 👏

@andreaslbigger Finally 🔥🔥🔥

Introducing Edge, a high level, strongly statically typed, multi-paradigm domain specific language for the Ethereum Virtual Machine (EVM). github.com/refcell/edge-rs

I did it 🎉 I've completed the Cyfrin Updraft Foundry Fundamentals! I've learned about: - Solidity smart contract development - Chainlink Blockchain Oracles - Foundry deployment and testing Check it out 👇 profiles.cyfrin.io/u/gabehellz/ac…

Announcing the Solidity Testing Handbook ✨ Fully free, one-stop resource for Solidity developers and security researchers. Resources are currently scattered across blogs, docs, and forums. I found it difficult to keep track of everything in one place. This handbook aggregates all testing patterns from basic unit tests to advanced mutation tests into a single, well-organized guide for quick reference. It’s built from my own learnings and best practices observed in popular codebases. soliditytestingbook.com

@gabrielrvita @privy_io It's so beautiful! Great job!!! 🎉

Building better user experiences with @privy_io embedded wallets. Balances, transfers, history and more, all inside the app without friction.

Mastering Ethereum (2nd Edition) — the go-to guide for Ethereum newcomers, builders, and even auditors. If you want to truly understand how Ethereum works under the hood, this is where you start. 📖 Read it for FREE: github.com/ethereumbook/e…

Governance was supposed to save DeFi. Instead, it's the #1 attack surface in 2026. Attackers aren't hacking code — they're "legally" draining treasuries with your own governance tokens. I've audited dozens of DAOs. Most are one flash loan away from total loss. Here are the 4 governance attack vectors exploding right now: 1. Flash Loan Voting: Borrow 51%of governance tokens → pass any proposal → return loan. Cost: < $50k in fees for multi-million drains. 2. Proposal Hijacking: Low quorum DAOs? Attacker submits "harmless" proposal → team endorses → slips in treasury transfer at the end. Nobody reads the full code. 3. Token Concentration Plays: Whales delegate quietly → suddenly control 60% → "community-approved" rug. 4. Bribe Markets Openly bribe voters on Snapshot. "Vote yes get 5% of treasury." Totally on-chain and "democratic". Most DAOs choose "vibes" over security. Are you in any DAO that could survive these?

🧪 A pakcked PoC list of newer exploits. Key takeaways for researchers: • Yul memory corruption traps • Accounting drift via rounding • Zero-value approval leaks • Unit/BPS math mismatches coinspect.com/blog/learn-evm…

🚀 The OWASP Smart Contract Top 10 team announces the 2026 OWASP Smart Contract Top 10. New research highlights the most critical smart contract risks, helping Web3 developers and security teams stay ahead of evolving threats. owasp.org/www-project-sm… #OWASP #SmartContracts #Web3 #OpenSource

@rosarioborgesi @Uniswap @CyfrinUpdraft I've been thinking about doing the Speedrun Ethereum challenges too. I guess I'll start doing it soon this week.

As much as I’d love to jump straight into the @uniswap V2 code, I know it’s still too early for me. The Speedrun Ethereum challenges are giving me the chance to practice with simpler use cases, and that’s helping me learn way better. Coming from @cyfrinupdraft, I feel confident about my Solidity knowledge. But I also know I still lack experience in building protocols from scratch. That’s exactly why these Speedrun Ethereum @buidlguidl challenges are such an important part of my learning journey. You don’t start building a house from the roof. You start from the foundation. 🧱

I did it! I've completed the Solidity fundamentals course 🎉 5 hours of resources to learn: - Solidity smart contract development - Blockchain oracles - Smart contract testing and security Completely for free. Check it out 👇 profiles.cyfrin.io/u/gabehellz/ac…

I just passed the Certification: Chainlink Fundamentals exam on Cyfrin Updraft! updraft.cyfrin.io/courses/chainl… @CyfrinUpdraft @chainlink