Unchecked Call Return Value of ERC20 Functions

Lines of code Vulnerability details Impact The return value of 'transfer' and 'transferFrom' should be verified since these two functions may only return false but not cause execution reverted once fail. If not properly handled, it might incur asset losses to users and the project party. Tools Us...

Lottery owner can rig the draw to win the jackpot by swapping the source

Lines of code Vulnerability details Lottery owner can rig the draw to win the jackpot by swapping the source Impact The lottery owner has the ability to swap the Random Source under certain cirumstances, and this can be exploited to set a new source contract that returns any number set by it. Thi...