Nexus smart account is not in compliance with EIP-7579
Summary
EIP-7579 clearly states that smart accounts MUST implement ERC-165. This includes returning false for any interface function that reverts instead of implementing the functionality. However, Nexus.sol does not implement ERC-165, making it non-compliant with EIP-7579.
Impact
The lack of ERC-165 implementation in Nexus.sol results in non-compliance with EIP-7579. This non-compliance can lead to interoperability issues with other smart contracts & modules expecting ERC-165 support.
Recommendation
Implement ERC-165 in Nexus.sol as recommended in the standard. This involves adding the supportsInterface function to check for supported interfaces & ensuring it returns false for unsupported interfaces.
Lead Judging Commences
finding-ERC7579-ERC165-non-compliant
The argument for medium severity here is the potential inconsistencies with external integrations that would like to query whether a contract supports the interface. The impact is arguable though, so would leave open for arguments during appeals period.
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