Hals @0xhals
Blockchain Developer | Smart Contract Security Researcher Open for collaboration ⛓💡 DM for audits 📩 Joined November 2022-
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Cool new foundry testing pattern I discovered today: If a mainnet contract has no way of accessing important data for testing, you can use vm.eth_getLogs to parse out events data and assert. I ran into this with OZ AccessControl checking DEFAULT_ADMIN_ROLE for a deployment ACL…
I have updated my profile on @FindAudit!😀 excited to collaborate on securing web3 protocols! reach out to discuss how we can work together! #web3Security #solidity #cairo app.findaudit.xyz/p/hals
the current disappointing scene of contests on almost all platforms (biased/ low quality judging)!
the current disappointing scene of contests on almost all platforms (biased/ low quality judging)!
Secured the 5th place 5⃣,, the judging took so long that I completely forgot I even participated in this one 😅👀
Secured the 5th place 5⃣,, the judging took so long that I completely forgot I even participated in this one 😅👀
Secured the 3rd place in "MorpheusAI" contest @CodeHawks 🤺🥉🤺
Secured the 3rd place in "MorpheusAI" contest @CodeHawks 🤺🥉🤺
Secured the 2nd place in "Olympus On-Chain Governance" contest @sherlockdefi 🥈🤺
Secured the 2nd place in "Olympus On-Chain Governance" contest @sherlockdefi 🥈🤺
lately there's been a lot of chatter about open source licenses. do you know the major differences between all of these? - permissive: MIT, BSD, Apache - gpl: GPL, AGPL, LGPL - unrestricted: public domain, unlicense - source-available: BSL TLDR summary of each license 👇
14th out of 31 rewarded participants 👀
14th out of 31 rewarded participants 👀
it's always important to check price deviation/validate the returned price of an oracle, no blind trust when integrating with a 3rd party!
it's always important to check price deviation/validate the returned price of an oracle, no blind trust when integrating with a 3rd party!
a thorough breakdown of the KyberSwap exploit mechanics! 👍
a thorough breakdown of the KyberSwap exploit mechanics! 👍
waiting for it! @CantinaBouncer 💪
waiting for it! @CantinaBouncer 💪
this tip is 👌💯🥇🤓: "get your hands on as many codebases as you can possibly imagine" !
this tip is 👌💯🥇🤓: "get your hands on as many codebases as you can possibly imagine" !
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Cool new foundry testing pattern I discovered today: If a mainnet contract has no way of accessing important data for testing, you can use vm.eth_getLogs to parse out events data and assert. I ran into this with OZ AccessControl checking DEFAULT_ADMIN_ROLE for a deployment ACL…
📢📢📢 I am thrilled to announce that I’ve joined @GuardianAudits as a full-time security researcher. I learned a lot from their YT channel, and now I have the chance to work with them. Thanks to @dannygfromnyc and @0xOwenThurm for this amazing opportunity.
The advice I got when I went into solo security research is that only the top 1-5% of researchers make enough money. Looking at it now this is true but a very shortsighted way of looking at things. If you’re building in public, working on your brand, and competing in the public…
Stats for recent win: -> Third consecutive 4-Fig win! -> Secured #8 position ->Thank you @cantinaxyz @3dns_inc
The downsides of the contest model no-one tells you about is: * countless hours of back-and-forth arguing with strangers over the Internet trying defend the uniqueness and validity of your findings, while also attacking the uniqueness and validity of others' findings since…
Over the past week, @sherlockdefi and the @Optimism team made what I believe is an erroneous re-scoping of the security contest rules. The direct consequence is invalidation of ~90% of the unique bugs submitted and re-shaping the payout. Long-term, this threatens to be a…
Audit the code not with the mindset of ensuring everything is written correctly, but rather with the mindset that there are numerous bugs in every function. Challenge every line of code and every parameter, aiming to uncover that bugs.
Back in December, I conducted a private audit for LayerZero V2. The report is available at: github.com/LayerZero-Labs… Seeing my name among legends like @cmichelio, and top-tier security companies such as @0xPaladinSec, @chain_security, @zellic_io, and @osec_io makes me PROUD!
1 Hour with @PatrickAlphaC where I cover: 1⃣ how I break down stateful fuzz testing by invariant types and contract lifecycle 2⃣ my favorite general heuristics which I use to find all sorts of bugs in many different codebases 3⃣ mindset and ultimate recipe for success Link👇
Got 20 minutes? I recommend watching this video featuring our own @KirsteinUri from @CertoraInc 👇 Even if you're not into fuzzing/FV, building a mental model is crucial for understanding the expected behaviors of protocols, so as to better break them youtu.be/dQLZCArP53I?si…
I have progressed tremendously over the past 6 months. Last week I was offered a leading position in one of the competitive audit platforms. What seemed unreachable a while ago, not is reality. For anyone starting with their web3 security journey. Don’t focus on tutorials and…
I'm thrilled to announce that I recently had the chance to contribute to strengthening the solid code base of @amet_finance. 🙏 I wish them a lot of success with the project. 💯 You can check my report here: 👇 github.com/NicolaMirchev/…
I now get to learn from some of the most based hackers since 2019. junior huntooooooor @HalbornSecurity 💫💫💫
Pattern recognition in audits: Especially during competitive audits, you'll need to recognize where the hot spots are so you get the most value in the least amount of time. How can pattern recognition help? 1/5🧵
𝐇𝐨𝐰 𝐝𝐢𝐝 𝐈 𝐟𝐢𝐧𝐝 𝐚 𝐰𝐚𝐲 𝐭𝐨 𝐛𝐥𝐨𝐜𝐤 𝐭𝐡𝐞 𝐋𝐚𝐲𝐞𝐫𝐙𝐞𝐫𝐨 𝐩𝐚𝐭𝐡𝐰𝐚𝐲? It’s February 2023 and I’m building the first omnichain index product on top of @LayerZero_Labs V1 with @phuture_finance. I’m tasked with exploring the ins and outs of LayerZero. I’m…
Wormhole Signers Change Your cross-chain contracts might have a serious vulnerability Wormhole Guardians are off-chain components that observe the Wormhole core contract for anyone invoking the `submitMessage` function. After the invocation, the guardians sign the payload and…
Handling whitelists for refunds seem to be one of the most common ways people are wasting tens of thousands of dollars every day... Here's another example... $10,448.84 spent by the deployer setting up their whitelist. Gaslite Merkle Airdrop is coming this week. Gas bad.
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