fallback.sol

contract fallbackVulnerability {
    
    mapping (address => uint) private balances;
    
    function addAllMoney (address Useraccount) public payable { 
        balances [Useraccount] = msg.value;
    }
    
    function withdrawAllMoney (uint Totalamount) public { 
        if (balances [msg.sender]>= Totalamount) { 
            msg.sender.call.value(Totalamount)(""); 
            balances [msg.sender] -= Totalamount;
        }
    }
}