# Structured Private Deposit Whitelist security audit

Structured Private Deposit is an ERC-4626 vault that accepts WBTC and issues spdBTC 1:1; this audit covered whitelist changes to its Solidity contract, which also has deposit limits, address blacklisting and a pause mechanism.

Codezen audited Structured Private Deposit Whitelist together with Oak Security. Technologies in scope: Solidity, Ethereum, EVM and Bitcoin. We reported 3 findings: 1 minor and 2 informational.

- Audit type: Solidity smart contract audit
- Technologies: Solidity, Ethereum, EVM, Bitcoin
- Ecosystem: Ethereum, Bitcoin
- Delivered with: Oak Security
- Report date: 4 December 2025
- Full report (PDF): https://github.com/oak-security/audit-reports/blob/main/Structured/2025-12-04%20Audit%20Report%20-%20Structured%20Private%20Deposit%20Whitelist%20v1.0.pdf
- Project website: https://github.com/structured-org
- Page: https://www.codezen.tech/audits/structured-spdbtc-whitelist/

## Findings by severity

| Severity | Count |
| --- | --- |
| Critical | 0 |
| Major | 0 |
| Minor | 1 |
| Info | 2 |
| Total | 3 |

Need a similar audit? Email info@codezen.tech or visit https://www.codezen.tech/.