Does that mean I can call approve(spender, value) in the USDT contract directly, but I can not call the same function in a contract, cause it is not a standard ERC20 contract, but what is the reason for it?
Does that mean I can call approve(spender, value) in the USDT contract directly, but I can not call the same function in a contract, cause it is not a standard ERC20 contract, but what is the reason for it?