aave-protocol-v2/contracts/flashloan/base/FlashLoanReceiverBase.sol

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;

import {SafeMath} from '../../dependencies/openzeppelin/contracts/SafeMath.sol';
import {IERC20} from '../../dependencies/openzeppelin/contracts/IERC20.sol';
import {SafeERC20} from '../../dependencies/openzeppelin/contracts/SafeERC20.sol';
import {IFlashLoanReceiver} from '../interfaces/IFlashLoanReceiver.sol';
import {ILendingPoolAddressesProvider} from '../../interfaces/ILendingPoolAddressesProvider.sol';
import {ILendingPool} from '../../interfaces/ILendingPool.sol';

abstract contract FlashLoanReceiverBase is IFlashLoanReceiver {
  using SafeERC20 for IERC20;
  using SafeMath for uint256;

  ILendingPoolAddressesProvider internal _addressesProvider;
  ILendingPool internal _lendingPool;

  constructor(ILendingPoolAddressesProvider provider) public {
    _addressesProvider = provider;
    _lendingPool = ILendingPool(provider.getLendingPool());
  }

  function getAddressesProvider() external view override returns (ILendingPoolAddressesProvider) {
    return _addressesProvider;
  }

  function getLendingPool() external view override returns (ILendingPool) {
    return _lendingPool;
  }

  receive() external payable {}
}