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pragma solidity ^0.6.0; | |
import "@openzeppelin/contracts/utils/Address.sol"; | |
interface IFlashLoanEtherReceiver { | |
function execute() external payable; | |
} | |
contract SideEntranceLenderPool { | |
using Address for address payable; | |
mapping (address => uint256) private balances; | |
function deposit() external payable { | |
balances[msg.sender] += msg.value; | |
} | |
function withdraw() external { | |
uint256 amountToWithdraw = balances[msg.sender]; | |
balances[msg.sender] = 0; | |
msg.sender.sendValue(amountToWithdraw); | |
} | |
function flashLoan(uint256 amount) external { | |
uint256 balanceBefore = address(this).balance; | |
require(balanceBefore >= amount, "Not enough ETH in balance"); | |
IFlashLoanEtherReceiver(msg.sender).execute{value: amount}(); | |
require(address(this).balance >= balanceBefore, "Flash loan hasn't been paid back"); | |
} | |
} |
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