pragma solidity ^0.5.0;

interface IWETH {
function deposit() external payable;
function transfer(address to, uint value) external returns (bool);
function withdraw(uint256 value) external payable;

}

interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}

contract testwithdraw {

uint256 public ETHAnt;
address public WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;

function deposit() public payable{
ETHAnt = msg.value;
IWETH(WETH).deposit.value(ETHAnt)();

}

function getContractBalance(address _to) public view returns(uint) {
uint256 Balance = IERC20(WETH).balanceOf(_to);
return Balance;
}
function withdraw(uint256 _value) public payable {
IWETH(WETH).withdraw.value(_value);
}

function safeApprove(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
}
}