Public write-ups on the bugs, patterns, and protocols we audit. Engineer-to-engineer, no fluff.
1.7 million possible ticks and the swap loop cannot scan them. One storage read, a mask, a bit scan. And one division that behaves differently for negative ticks.
Read
How much did a position earn while in range, over months of crossings, with no loops and one checkpoint? V3 answers in two subtractions by storing the wrong side on purpose.
Read
Every division in SqrtPriceMath decides where the lost fraction goes. V3 answers the same way every time: the pool wins. Get one flag backwards and you have built a faucet.
Read
A builder focused Hyperliquid security checklist covering HyperBFT assumptions, HyperCore integrations, HyperEVM deployment risks, and pre audit launch gates before mainnet.
Read
A builder focused Hyperliquid security checklist covering HyperBFT, HyperCore, HyperEVM, order flow, liquidation, oracle, bridge, and pre audit risks before launch.
Read
EIP-7702 lets EOAs become smart contracts with one signature. Here are the 4 attack surfaces — phishing, delegate bugs, replay, ERC-4337 — auditors now check.
Read1.7 million possible ticks and the swap loop cannot scan them. One storage read, a mask, a bit scan. And one division that behaves differently for negative ticks.
ReadHow much did a position earn while in range, over months of crossings, with no loops and one checkpoint? V3 answers in two subtractions by storing the wrong side on purpose.
ReadEvery division in SqrtPriceMath decides where the lost fraction goes. V3 answers the same way every time: the pool wins. Get one flag backwards and you have built a faucet.
Read
A full smart contract audit costs $15k-$100k+. Here is an honest comparison of every option an underfunded web3 founder actually has in 2026: free tools, AI review, audit contests, bug bounties, time-boxed audit sessions, and when each one is enough.
Read
A senior auditor walks through what actually happens during a smart contract audit, week by week. Pre-audit prep, manual review, findings, fix verification, and final deliverables.
Read
The 2026 security timeline for Web3 protocols: when to audit at design, dev, pre-launch, and post-launch — plus real lead times, audit costs, and launch buffer rules.
Read
When LLMs can prepare or sign transactions, smart contract risk expands into prompt injection, policy drift, simulation mismatch, and wallet authority abuse.
Read
How to audit AI trading bots and onchain agents before prompt injection, wallet misuse, and market-facing automation turn into fund loss.
Read
Technical analysis of the largest crypto hack ($1.5B). How compromised frontend infrastructure enabled UI injection that turned blind signing into a total drain.
Read
The ERC-4626 inflation attack still drains vaults in 2026. See the deposit-donate math, real hacks (Cream, Sonne, Resupply), and the invariants that catch it.
Read
Most 2026 DeFi losses came from compromised signers, not buggy code. How multisig, timelocks, and MPC contain key compromise — lessons from Drift's $285M hack.
Read
How flash loans amplify oracle, donation, and reentrancy bugs into $200M+ DeFi exploits — Cetus, Penpie, KyberSwap, UwU Lend case studies plus defenses that hold.
Read
Free Discords, CTFs, audit contest platforms, bootcamps, and paid memberships compared. What each one actually gives a web3 developer, aspiring auditor, or protocol founder in 2026, what it costs, and how to choose.
Read
Most Web3 founders are technical and ship great code, then watch the protocol die to non-code problems. Tokenomics, fundraising, governance, regulatory, GTM — this is what kills teams.
Read
The 2026 OWASP Smart Contract Top 10 elevated business logic to #2 and added proxy & upgradeability at #10. Here's what changed and how to audit.
Read
How to learn Web3 from scratch: the right order to actually understand blockchains, wallets, DeFi, and scams, in a free 90-day path.
Read
A free, interactive Zealynx Academy course that teaches you to understand Web3 for real, crypto, DeFi, wallets, DAOs, scams, security, not memorize jargon.
Read
After 30+ audits, we kept seeing failures rooted in missing literacy, not missing code skill. So a security firm built a beginner course. Here's why.
Read
Uniswap v4 security guide for hook risk, singleton architecture, and flash accounting. See what builders should audit before launch.
Read
Web2 casinos hide RTP manipulation. Solana GambleFi uses VRF and Zero-Edge models to make outcomes verifiable. Zealynx auditors explain the security trade-offs.
Read
Discover how optimization theory, information theory, and graph theory create security vulnerabilities in AI systems. Learn about real-time poisoning attacks, model leakage, graph manipulation, and mathematical attack vectors targeting LLMs and neural networks.
Read
How LLMs use set theory internally and how attackers exploit its limitations to jailbreak AI models with paradoxical prompts.
Read
Understand the Critical Factors that Lead to Model Degradation and How to widen your perspective as an AI researcher
Read
Understand the Basic Principles of how Neural Networks Works
Read
Understand the fundamentals working principles of Feed Forward Neural Netowrk and its Security
Read
Understand how Tokenizers works and it Inheritable Security Vulnerabilities on LLMs
Read
Learn why $3B+ was lost despite audits, how parametric insurance works, and the optimal 70/30 budget split for protocol security in 2026.
Read
$3.4B lost in 2025: Bybit, Cetus, Balancer breakdowns. Zealynx auditors explain blind signing, supply chain attacks, and how to close audit blind spots.
Read
Smart contract audit cost depends on contract complexity, chain, and timeline. See 2026 pricing ranges for tokens, DeFi, bridges, and how to lower your quote before you request an audit.
Read
ERC-1400 security token standard explained: Implement compliant RWA tokenization with partitions, transfer restrictions, and KYC hooks. Complete developer guide for regulated blockchain securities.
Read