Created
January 28, 2023 18:02
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// SPDX-License-Identifier: MIT | |
pragma solidity ^0.8.0; | |
import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; | |
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Snapshot.sol"; | |
import "@openzeppelin/contracts/utils/Address.sol"; | |
import "./SimpleGovernance.sol"; | |
/** | |
* @title SelfiePool | |
* @author Damn Vulnerable DeFi (https://damnvulnerabledefi.xyz) | |
*/ | |
contract SelfiePool is ReentrancyGuard { | |
using Address for address; | |
ERC20Snapshot public token; | |
SimpleGovernance public governance; | |
event FundsDrained(address indexed receiver, uint256 amount); | |
modifier onlyGovernance() { | |
require(msg.sender == address(governance), "Only governance can execute this action"); | |
_; | |
} | |
constructor(address tokenAddress, address governanceAddress) { | |
token = ERC20Snapshot(tokenAddress); | |
governance = SimpleGovernance(governanceAddress); | |
} | |
function flashLoan(uint256 borrowAmount) external nonReentrant { | |
uint256 balanceBefore = token.balanceOf(address(this)); | |
require(balanceBefore >= borrowAmount, "Not enough tokens in pool"); | |
token.transfer(msg.sender, borrowAmount); | |
require(msg.sender.isContract(), "Sender must be a deployed contract"); | |
msg.sender.functionCall( | |
abi.encodeWithSignature( | |
"receiveTokens(address,uint256)", | |
address(token), | |
borrowAmount | |
) | |
); | |
uint256 balanceAfter = token.balanceOf(address(this)); | |
require(balanceAfter >= balanceBefore, "Flash loan hasn't been paid back"); | |
} | |
function drainAllFunds(address receiver) external onlyGovernance { | |
uint256 amount = token.balanceOf(address(this)); | |
token.transfer(receiver, amount); | |
emit FundsDrained(receiver, amount); | |
} | |
} |
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