0x38d32f48…2187·#6,944,662·view on Etherscan
Owner should be correctOnly lesson time (starting time `D16:30GMT +3/-1 hours)Only registered membersOnly once lesson visitingDate time interval restrictionMember can be added onceLesson period should be greater `DOnly registered memberLesson index is out of boundsOnly registered memberMinimum lesson count to get cert`Dificate should be less than tota`dLesson index must be less than l`DOnly registered membersEthereum Signed Message:
32Signature length == 65Only contract owner