pragma solidity ^0.7.0;

interface AaveInterface {
    function deposit(address _reserve, uint256 _amount, uint16 _referralCode) external payable;
    function redeemUnderlying(
        address _reserve,
        address payable _user,
        uint256 _amount,
        uint256 _aTokenBalanceAfterRedeem
    ) external;
    function setUserUseReserveAsCollateral(address _reserve, bool _useAsCollateral) external;
    function getUserReserveData(address _reserve, address _user) external view returns (
        uint256 currentATokenBalance,
        uint256 currentBorrowBalance,
        uint256 principalBorrowBalance,
        uint256 borrowRateMode,
        uint256 borrowRate,
        uint256 liquidityRate,
        uint256 originationFee,
        uint256 variableBorrowIndex,
        uint256 lastUpdateTimestamp,
        bool usageAsCollateralEnabled
    );
    function borrow(address _reserve, uint256 _amount, uint256 _interestRateMode, uint16 _referralCode) external;
    function repay(address _reserve, uint256 _amount, address payable _onBehalfOf) external payable;
}

interface AaveProviderInterface {
    function getLendingPool() external view returns (address);
    function getLendingPoolCore() external view returns (address);
}

interface AaveCoreInterface {
    function getReserveATokenAddress(address _reserve) external view returns (address);
}

interface ATokenInterface {
    function redeem(uint256 _amount) external;
    function balanceOf(address _user) external view returns(uint256);
    function principalBalanceOf(address _user) external view returns(uint256);
}