// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.8.0 <0.9.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface ISperStrategy {

    event Reward(uint256 amount);
    event PortfolioManagerUpdated(address value);
    event SlippagesUpdated(uint256 swapSlippageBP, uint256 navSlippageBP, uint256 stakeSlippageBP);
    event Stake(uint256 amount);
    event Unstake(uint256 amount, uint256 amountReceived);

    function stake(
        address _asset,
        uint256 _amount
    ) external;

    function unstake(
        address _asset,
        uint256 _amount,
        address _beneficiary,
        bool targetIsZero
    ) external returns (uint256);

    function netAssetValue() external view returns (uint256);

    function liquidationValue() external view returns (uint256);

    function claimRewards(address _to) external returns (uint256);

}