Can’t Afford a Smart Contract Audit? 7 Options | Zealynx
Compare seven realistic security options when a full smart contract audit is out of budget, from free tools and AI review to senior audit sessions.
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Public write-ups on the bugs, patterns, and protocols we audit. Engineer-to-engineer, no fluff.
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When Every Check Passes but a Protocol Is Underbacked
A comparative study of transaction-level backing failures, from YadaCoin and public audit findings to the Opyn exploit and MISO disclosure.
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Floor Is Not Truncation: The Uniswap V3 TickBitmap
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
Fee Growth Outside: The Uniswap V3 Trick Nobody Explains Well
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.
ReadCategory / smart-contracts
See all in Smart Contract Security Smart Contract Security.
Hyperliquid Security Checklist for Builders: HyperBFT, HyperCore, HyperEVM Risks Before Mainnet
A builder focused Hyperliquid security checklist covering HyperBFT assumptions, HyperCore integrations, HyperEVM deployment risks, and pre audit launch gates before mainnet.
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Hyperliquid Security Checklist for Builders: HyperBFT, HyperCore, HyperEVM
A builder focused Hyperliquid security checklist covering HyperBFT, HyperCore, HyperEVM, order flow, liquidation, oracle, bridge, and pre audit risks before launch.
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EIP-7702 wallet security: what auditors check after Pectra
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.
ReadCategory / protocol-deep-dives
See all in DeFi Protocol Analysis DeFi Protocol Analysis.
Floor Is Not Truncation: The Uniswap V3 TickBitmap
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.
ReadFee Growth Outside: The Uniswap V3 Trick Nobody Explains Well
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
Who Eats the Wei: Rounding as a Security Boundary in Uniswap V3
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.
ReadCategory / audit-ops
See all in Audit Operations Audit Operations.
Can’t Afford a Smart Contract Audit? 7 Options | Zealynx
Compare seven realistic security options when a full smart contract audit is out of budget, from free tools and AI review to senior audit sessions.
Read
What Happens During a Smart Contract Audit: Week-by-Week Process
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.
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When to audit a smart contract: The 2026 security timeline
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.
ReadCategory / adversarial-security
See all in Adversarial & AI Security Adversarial & AI Security.
When LLMs Sign Transactions: AI-Driven Smart Contract Threat Model
When LLMs can prepare or sign transactions, smart contract risk expands into prompt injection, policy drift, simulation mismatch, and wallet authority abuse.
Read
Auditing AI Trading Bots: Security Framework
How to audit AI trading bots and onchain agents before prompt injection, wallet misuse, and market-facing automation turn into fund loss.
Read
Blind Signing: The Bybit $1.5B Lesson in UI Insecurity
Technical analysis of the largest crypto hack ($1.5B). How compromised frontend infrastructure enabled UI injection that turned blind signing into a total drain.
ReadCategory / web3-attack-vectors
See all in Web3 Attack Vectors Web3 Attack Vectors.
ERC-4626 inflation attack: how it works and how to stop it
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.
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Signer compromise: why clean audits don't stop key hacks
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
Flash loan attacks: anatomy of nine-figure DeFi exploits
How flash loans amplify oracle, donation, and reentrancy bugs into $200M+ DeFi exploits — Cetus, Penpie, KyberSwap, UwU Lend case studies plus defenses that hold.
ReadCategory / industry
See all in Industry and Compliance Industry and Compliance.
Web3 Security Communities in 2026: Where Developers, Auditors, and Founders Actually Level Up
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.
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The Web3 Founder's Survival Guide: Everything No Engineering Curriculum Teaches
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.
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OWASP Smart Contract Top 10 2026: changes and audit guide
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.
ReadCategory / zealynx-news
See all in Zealynx News Zealynx News.
New to Web3? The Exact 90-Day Path We'd Give a Complete Beginner
How to learn Web3 from scratch: the right order to actually understand blockchains, wallets, DeFi, and scams, in a free 90-day path.
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Introducing Your First 90 Days in Web3: A Free, Guided Path to Actually Understand the Space
A free, interactive Zealynx Academy course that teaches you to understand Web3 for real, crypto, DeFi, wallets, DAOs, scams, security, not memorize jargon.
Read
Why a Smart Contract Audit Firm Built a Free Beginner Web3 Course
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.
ReadShowing 12 of 165
All research.
When Every Check Passes but a Protocol Is Underbacked
A comparative study of transaction-level backing failures, from YadaCoin and public audit findings to the Opyn exploit and MISO disclosure.
ReadFloor Is Not Truncation: The Uniswap V3 TickBitmap
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.
ReadFee Growth Outside: The Uniswap V3 Trick Nobody Explains Well
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.
ReadWho Eats the Wei: Rounding as a Security Boundary in Uniswap V3
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
Uniswap V3 Does Not Store the Price
Open the V3 pool contract and look for the price. It is not there. What is stored is the square root, in Q64.96, and that single choice is what makes the swap loop affordable.
Read
Why Uniswap V3 Threw Away the LP Token
Concentrated liquidity gives 10,000 dollars the depth of 40 million. That one decision forced Uniswap V3 to abandon LP tokens, reserves, and compounding fees. Here is why.
ReadWhen LLMs Sign Transactions: AI-Driven Smart Contract Threat Model
When LLMs can prepare or sign transactions, smart contract risk expands into prompt injection, policy drift, simulation mismatch, and wallet authority abuse.
ReadCan’t Afford a Smart Contract Audit? 7 Options | Zealynx
Compare seven realistic security options when a full smart contract audit is out of budget, from free tools and AI review to senior audit sessions.
ReadWeb3 Security Communities in 2026: Where Developers, Auditors, and Founders Actually Level Up
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.
ReadAuditing AI Trading Bots: Security Framework
How to audit AI trading bots and onchain agents before prompt injection, wallet misuse, and market-facing automation turn into fund loss.
ReadBlind Signing: The Bybit $1.5B Lesson in UI Insecurity
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
AI Agents Holding Crypto Wallets: The Security Model
When AI agents can hold keys, sign transactions, and move funds, the security model changes completely. The practical controls auditors now expect.
Read