Web3 Security Audit
A focused audit for Web3 applications where front-end signing, smart contracts, protocol permissions, and off-chain services interact.
Many Web3 incidents begin outside the exact contract function that loses funds. A transaction builder signs the wrong payload, a relayer trusts the wrong source, an admin key has too much power, or a front end hides a risky state transition.
CTDSEC reviews the smart contracts first, then follows the path users, operators, and automated services take through the system.
What CTDSEC reviews
The review is tailored to the target chain and codebase, but the audit always starts with assets at risk, trust boundaries, and the concrete ways the protocol can fail.
Audit focus
Web3 Security Audit with manual review, tool-assisted coverage, and remediation support.
Audit Coverage
- Smart contracts, dApp transaction flows, and wallet interactions
- Signature formats, nonce handling, replay protection, and chain IDs
- Frontend assumptions that affect user approvals or signing
- Backend services with contract permissions
- Token approvals, permit flows, and account abstraction interactions
- Monitoring, pause, and incident-response readiness
Risk Areas
- Unsafe signatures or replayable approvals
- Incorrect chain or contract address validation
- Overbroad permissions and upgrade controls
- Phishing-sensitive transaction flows
- Broken assumptions between off-chain and on-chain code
Deliverables
- Contract findings plus user-flow security notes
- Recommendations for safer signing and permission boundaries
- Remediation guidance for application and protocol code
- Report suitable for stakeholders and technical teams
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Prepare for Your Audit
Practical review questions and scoping guidance for your engineering team.
Smart Contract Audit Checklist
A practical smart contract audit checklist covering scope, access control, accounting, oracles, upgrades, tests, deployment, and remediation.
How to Prepare for a Smart Contract Audit
How protocol teams can prepare repositories, documentation, tests, deployment details, and scope before a smart contract audit.
How Much Does a Smart Contract Audit Cost?
What affects smart contract audit cost, including code size, complexity, blockchain ecosystem, documentation, testing, and remediation needs.
Smart Contract Audit FAQ
Short answers for teams preparing an audit scope.
What does a web3 security audit include?
It includes scope confirmation, manual code review, tool-assisted analysis where useful, severity-ranked findings, remediation guidance, and a final report for the agreed disclosure model.
Can CTDSEC review fixes after the audit?
Yes. Fix verification can be included after the team remediates reported findings, using a new commit and a clear change summary.
How is a web3 security audit priced?
The quote depends on the agreed code scope, complexity, dependencies, and remediation review. Start with a project description; we can clarify repository access and timeline by email.
Get a smart contract audit quote
Tell us what you are building and when you plan to launch. Start with a short description; repository access and technical scope can follow.