[MEDIUM] NFTBoostVault#addNftAndDelegate - Not setting a delegatee in the addNftAndDelegate will cause the addTokens function and updateNft to revert

Lines of code Vulnerability details Impact The absence of a delegatee in the addNftAndDelegate function in the NFTBoostVault contract will cause the addTokens and updateNft functions to revert. This is due to the assumption that a delegatee has been set, which is not always true. This issue may...