function lastTimeRewardApplicable() external view returns (uint256)

function rewardPerToken() external view returns (uint256)

function earned(address account) external view returns (uint256)

function getRewardForDuration() external view returns (uint256)

function totalSupply() external view returns (uint256)

function balanceOf(address account) external view returns (uint256)

function periodFinish() external view returns (uint256)

function rewardRate() external view returns (uint256)

function lastUpdateTime() external view returns (uint256)

function rewardPerTokenStored() external view returns (uint256)

function rewardsDuration() external view returns (uint256)

function rewardsToken() external view returns (contract IERC20)

function stakingToken() external view returns (contract IERC20)

function stake(uint256 amount) external

function withdraw(uint256 amount) external

function getReward() external

function exit() external