NO STORAGE GAP FOR UPGRADEABLE CONTRACTS
Summary
NO STORAGE GAP FOR UPGRADEABLE CONTRACTS
Vulnerability Details
For IERC721Upgradeable and IERC721MetadataUpgradeable, which are upgradeable abstract contracts, inheriting contracts may introduce new variables. In order to be able to add new variables to the upgradeable abstract contract without causing storage collisions, a storage gap should be added to the upgradeable abstract contract.
If no storage gap is added, when the upgradable abstract contract introduces new variables, it may override the variables in the inheriting contract.
Impact
Tools Used
Recommendations
Consider adding a storage gap at the end of the upgradeable abstract contract
Lead Judging Commences
storage-gap
Lack of storage gaps in SDLPool might impact storage of SDLPoolPrimary and SDLPoolSecondary if new storage introduced in future.
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