# Structured ERC20 Converter, ETH Wrapper, MaxBTC ERC20 for Eureka Bridge security audit

Structured's maxBTC Eureka bridge contracts in Solidity were audited here: an upgradable ERC20 with bridge-controlled minting and burning across Neutron and Cosmos, a WETH-like ETH wrapper for automated bridging and a fixed-rate converter.

Codezen audited Structured ERC20 Converter, ETH Wrapper, MaxBTC ERC20 for Eureka Bridge together with Oak Security. Technologies in scope: Solidity, Ethereum, EVM, Bitcoin and Bridge. We reported 13 findings: 5 minor and 8 informational.

- Audit type: Solidity smart contract audit
- Technologies: Solidity, Ethereum, EVM, Bitcoin, Bridge
- Ecosystem: Ethereum, Bitcoin
- Delivered with: Oak Security
- Report date: 25 November 2025
- Full report (PDF): https://github.com/oak-security/audit-reports/blob/main/Structured/2025-11-25%20Audit%20Report%20-%20Structured%20ERC20%20Converter%2C%20ETH%20Wrapper%2C%20MaxBTC%20ERC20%20for%20Eureka%20Bridge%20v1.0.pdf
- Project website: https://github.com/structured-org
- Page: https://www.codezen.tech/audits/structured-maxbtc-erc20-for-eureka-bridge/

## Findings by severity

| Severity | Count |
| --- | --- |
| Critical | 0 |
| Major | 0 |
| Minor | 5 |
| Info | 8 |
| Total | 13 |

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