# Invite fees in FairLauncher::_calInviteFees() may be 0, in which case storage update could be skipped Low/Info · Three Sigma · Social money games · 13th June, 2024 Finding 3S-D1-N03 of the DistrictOne security review. - Protocol: https://districtone.io/ - Report: /reports/districtone - Source: https://cdn.sanity.io/files/qoqld077/production/fd2142f1d189dd29db23dff49d4018d4da9c01d6.pdf --- ### Description In FairLauncher::_calInviteFees(), state updates are skipped if the directInviter is address(0), but they could also be skipped if the amount is null, which happens after the hard cap is reached. ### Recommendation Skip storage slot updates if the amount is null. ### Status Acknowledged --- Related findings: - [Uneven getPendingAccFundingFees() leading to wrong funding rate update](https://0xsimao.com/findings/ostium-uneven-acc-funding-fees): Ostium