Hawk High

Summary

The UUPSUpgradeable contract does not include a reserved storage gap (__gap), which is critical for ensuring upgradeable contract safety. This omission can lead to storage collisions when new variables are added in future implementations, potentially overwriting existing storage and introducing unexpected behavior.

Impact

Without a reserved storage gap, any newly added state variables in upgraded implementations may overlap with storage slots used by the inherited contracts. This can corrupt contract state, break logic, or introduce vulnerabilities that are hard to detect.

Recommendation

Add a fixed-size storage gap at the end of the contract, as recommended by OpenZeppelin's UUPSUpgradeable pattern. For example:

This allows for future upgrades without risking storage conflicts.

References

• OpenZeppelin Docs - UUPS Upgradeable Pattern

• EIP-1822: Universal Upgradeable Proxy Standard

Tools Used

• Manual Review