// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.6.12;

import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";

interface CTokenInterface is IERC20Upgradeable {
    function decimals() external view returns (uint8);
    function totalSupply() external override view returns (uint256);
    function underlying() external view returns (address);
    function balanceOfUnderlying(address owner) external returns (uint256);
    function supplyRatePerBlock() external returns (uint256);
    function exchangeRateCurrent() external returns (uint256);
    function mint(uint256 mintAmount) external returns (uint256);
    function redeem(uint256 amount) external returns (uint256);
    function balanceOf(address user) external override view returns (uint256);
    function redeemUnderlying(uint256 redeemAmount) external returns (uint256);
}