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
Solana audit guide for 2026 covering Firedancer finality risk, Token-2022 transfer hook reviews, localized DoS pressure, and what auditors check before launch.
Read
MiCA is forcing EU crypto projects to take security seriously. Learn what the regulation actually requires — security audits, penetration testing, smart contract reviews — and how to prepare before regulators come knocking.
Read
Discover the 2026 Solidity Smart Contract Audit Manifesto. Learn why 'Lines of Code' pricing is dead, explore new smart contract audit costs, AI-driven security, and the essential audit readiness checklist for protocol leaders.
Read
Master Uniswap v4's four swap types: zeroToOne, oneToZero, exactInputForOutput, and exactOutputForInput. Learn to implement SwapParams correctly and interpret BalanceDelta results securely.
Read
OpenClaw security guide for teams deploying personal AI agents. Learn the top risks, prompt injection, malicious skills, exposed admin panels, and the hardening checklist that prevents agent compromise.
Read
Q64.96 fixed-point math powers Uniswap V3/V4 pricing. Learn how sqrtPriceX96 overflows happen and how Zealynx auditors catch them before they cost you.
Read
Compare UUPS, Transparent, Beacon, and Diamond smart contract upgradeability patterns, including storage collision risks, access control, and audit checks.
Read
Run 45 Solana audit checks for Anchor and native programs, covering signer validation, CPI safety, PDAs, Token-2022, and pre-launch review.
ReadHyperliquid architecture explained for builders comparing HyperBFT, HyperCore, and HyperEVM before they integrate, launch, or scope a Hyperliquid audit.
Read
100+ cross-chain bridge security checks. Prevent exploits like Ronin ($625M), Wormhole ($320M), and Nomad ($190M). For bridge builders, auditors, and DeFi teams.
Read
A comprehensive Q&A on Uniswap v4 Hooks, covering technical implementation, security considerations, and architecture from the Uniswap Hook Incubator Cohort 2.
Read
Compare Move, Rust (Solana), and Solidity (EVM) architecture. Discover how L1 language choice impacts smart contract security, reentrancy risks, and audit requirements.
Read