NFT Smart Contract Audits

NFT contracts have a narrower attack surface than a lending protocol, but the failure modes are just as real — and often more visible, since a broken mint function or a drained royalty-withdrawal path plays out in public, in real time, during a live drop. Firepan's audit targets the specific patterns that have gone wrong in real NFT launches.

What an NFT Audit Covers

• Mint logic and supply caps — whether max-supply enforcement, per-wallet mint limits, and allowlist/presale logic can be bypassed or gamed (integer handling here maps to integer overflow patterns)
• Reentrancy in withdrawal and royalty paths — withdraw functions and royalty-split logic that call external addresses are a common reentrancy surface (see reentrancy)
• Access control on privileged functions — reveal mechanics, metadata URI updates, and owner-gated withdraw/pause functions (see access control)
• Front-running on mint transactions — public mint functions during a hyped drop are a classic front-running and MEV target (see front-running)
• Marketplace and royalty-enforcement logic — for collections integrating with marketplace contracts, whether royalty enforcement can be bypassed via wrapper contracts or approval manipulation

How Firepan Audits an NFT Contract

Firepan's surface scan applies deterministic patterns and bug-class detectors to the ERC-721/ERC-1155 implementation and custom mint, reveal, royalty, and withdrawal logic. A deep audit adds repository context and tested security hypotheses; best-effort Slither output can corroborate compatible findings. HOUND checks evidence against NFT-specific failure modes rather than treating generic Solidity warnings as confirmed vulnerabilities.

A free surface scan typically covers standard ERC-721/1155 implementations in minutes; custom mint mechanics, on-chain generative logic, or marketplace integrations run as a full deep audit.

Frequently Asked Questions

Q: What's the most common vulnerability in NFT contracts?

A: Reentrancy in withdrawal or royalty-split functions and access-control gaps around reveal, metadata, mint, or administrative functions are common review surfaces. The priority depends on the collection's actual mechanics.

---

Q: Can an audit prevent front-running during a live mint?

A: An audit can identify front-running exposure and recommend mitigations (commit-reveal schemes, per-block mint limits, allowlist-only phases), but preventing MEV entirely at the mint-transaction level is a design choice made before launch, not something an audit retroactively fixes on deployed code.

---

Q: Do NFT contracts need continuous monitoring after mint completes?

A: Collections with ongoing royalty flows, staking, upgrades, or reveal logic need operational monitoring after mint. Firepan can repeat repository checks on configured events, but it does not claim blanket monitoring of post-mint on-chain activity.

---

Q: How much does an NFT contract audit cost?

A: Standard ERC-721/1155 implementations with typical mint/reveal logic are on the lower end of audit complexity industry-wide. Firepan's free surface scan gives you a first pass at no cost; full deep audits are covered under any paid plan starting at $299/month.

Run a free surface scan on your NFT contract now.