N2D_Sample_AAVE_Flash_Loan_Contract.sol

/*

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PLEASE DO NOT DEPLOY ON A MAINNET, ONLY ON A TESTNET
NET2DEV NOR COOKBOOK.DEV WILL NOT ASSUME ANY RESPONSIBILITY FOR ANY USE, LOSS OF FUNDS OR ANY OTHER ISSUES.
*/

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.10;

import {IERC20} from '../../dependencies/openzeppelin/contracts/IERC20.sol';
import {GPv2SafeERC20} from '../../dependencies/gnosis/contracts/GPv2SafeERC20.sol';
import {SafeMath} from '../../dependencies/openzeppelin/contracts/SafeMath.sol';
import {IPoolAddressesProvider} from '../../interfaces/IPoolAddressesProvider.sol';
import {FlashLoanSimpleReceiverBase} from '../../flashloan/base/FlashLoanSimpleReceiverBase.sol';
import {MintableERC20} from '../tokens/MintableERC20.sol';
import {IPool} from '../../interfaces/IPool.sol';
import {DataTypes} from '../../protocol/libraries/types/DataTypes.sol';

contract FlashloanAttacker is FlashLoanSimpleReceiverBase {
  using GPv2SafeERC20 for IERC20;
  using SafeMath for uint256;

  IPoolAddressesProvider internal _provider;
  IPool internal _pool;

  constructor(IPoolAddressesProvider provider) FlashLoanSimpleReceiverBase(provider) {
    _pool = IPool(provider.getPool());
  }

  function executeOperation(
    address asset,
    uint256 amount,
    uint256 premium,
    address, // initiator
    bytes memory // params
  ) public override returns (bool) {

    IERC20(asset).approve(address(POOL), amount.add(premium));
    return true;
  }

  function requestFlashLoan(address _token, uint256 _amount) public {
    address receiverAddress = address(this);
    address asset = _token;
    uint256 amount = _amount;
    bytes memory params = "";
    uint16 referralCode = 0;

    POOL.flashLoanSimple(
        receiverAddress,
        asset,
        amount,
        params,
        referralCode
        );
    }

}