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// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.17;
/**
 * @title esLBRMiner is a stripped down version of Synthetix StakingRewards.sol, to reward esLBR to EUSD minters.
 * Differences from the original contract,
 * - Get `totalStaked` from totalSupply() in contract EUSD.
 * - Get `stakedOf(user)` from getBorrowedOf(user) in contract EUSD.
 * - When an address borrowed EUSD amount changes, call the refreshReward method to update rewards to be claimed.
 */

import "./ILybra.sol";
import "./Ownable.sol";
import "./IesLBR.sol";

contract esLBRMiner is Ownable {
    ILybra public immutable lybra;
    address public esLBR;

    // Duration of rewards to be paid out (in seconds)
    uint256 public duration;
    // Timestamp of when the rewards finish
    uint256 public finishAt;
    // Minimum of last updated time and reward finish time
    uint256 public updatedAt;
    // Reward to be paid out per second
    uint256 public rewardRate;
    // Sum of (reward rate * dt * 1e18 / total supply)
    uint256 public rewardPerTokenStored;
    // User address => rewardPerTokenStored
    mapping(address => uint256) public userRewardPerTokenPaid;
    // User address => rewards to be claimed
    mapping(address => uint256) public rewards;

    uint256 public extraRate = 150;

    constructor(
        address _lybra
    ) {
        lybra = ILybra(_lybra);
    }

    function setEsLBR(address _eslbr) external onlyOwner {
        esLBR = _eslbr;
    }

    function setExtraRate(uint256 rate) external onlyOwner {
        require(rate > 100);
        extraRate = rate;
    }

    function totalStaked() internal view returns (uint256) {
        return lybra.totalSupply();
    }

    function stakedOf(address user) public view returns (uint256) {
        uint256 amount = lybra.getBorrowedOf(user);
        if (lybra.isRedemptionProvider(user)) {
            amount = (amount * extraRate) / 100;
        }
        return amount;
    }

    modifier updateReward(address _account) {
        rewardPerTokenStored = rewardPerToken();
        updatedAt = lastTimeRewardApplicable();

        if (_account != address(0)) {
            rewards[_account] = earned(_account);
            userRewardPerTokenPaid[_account] = rewardPerTokenStored;
        }

        _;
    }

    function lastTimeRewardApplicable() public view returns (uint256) {
        return _min(finishAt, block.timestamp);
    }

    function rewardPerToken() public view returns (uint256) {
        if (totalStaked() == 0) {
            return rewardPerTokenStored;
        }

        return
            rewardPerTokenStored +
            (rewardRate * (lastTimeRewardApplicable() - updatedAt) * 1e18) /
            totalStaked();
    }

    function refreshReward(address _account) external updateReward(_account) {}

    function earned(address _account) public view returns (uint256) {
        return
            ((stakedOf(_account) *
                (rewardPerToken() - userRewardPerTokenPaid[_account])) / 1e18) +
            rewards[_account];
    }

    function getReward() external updateReward(msg.sender) {
        uint256 reward = rewards[msg.sender];
        if (reward > 0) {
            rewards[msg.sender] = 0;
            IesLBR(esLBR).mint(msg.sender, reward);
        }
    }

    function setRewardsDuration(uint256 _duration) external onlyOwner {
        require(finishAt < block.timestamp, "reward duration not finished");
        duration = _duration;
    }

    function notifyRewardAmount(uint256 amount)
        external
        onlyOwner
        updateReward(address(0))
    {
        require(amount > 0, "amount = 0");
        if (block.timestamp >= finishAt) {
            rewardRate = amount / duration;
        } else {
            uint256 remainingRewards = (finishAt - block.timestamp) *
                rewardRate;
            rewardRate = (amount + remainingRewards) / duration;
        }

        require(rewardRate > 0, "reward rate = 0");

        finishAt = block.timestamp + duration;
        updatedAt = block.timestamp;
    }

    function _min(uint256 x, uint256 y) private pure returns (uint256) {
        return x <= y ? x : y;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.17;

interface IesLBR {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function mint(address user, uint256 amount) external returns(bool);
    function burn(address user, uint256 amount) external returns(bool);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.17;

interface ILybra {
    function totalSupply() external view returns (uint256);

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

    function totalDepositedEther() external view returns (uint256);

    function safeCollateralRate() external view returns (uint256);

    function redemptionFee() external view returns (uint256);

    function keeperRate() external view returns (uint256);

    function depositedEther(address user) external view returns (uint256);

    function getBorrowedOf(address user) external view returns (uint256);

    function isRedemptionProvider(address user) external view returns (bool);

    function allowance(address owner, address spender) external view returns (uint256);

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);

    function transferShares(
        address _recipient,
        uint256 _sharesAmount
    ) external returns (uint256);

    function getSharesByMintedEUSD(
        uint256 _EUSDAmount
    ) external view returns (uint256);

    function getMintedEUSDByShares(
        uint256 _sharesAmount
    ) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "./Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

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00000000000000000000000097de57ec338ab5d51557da3434828c5dbfada371

-----Decoded View---------------
Arg [0] : _lybra (address): 0x97de57eC338AB5d51557DA3434828C5DbFaDA371

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000097de57ec338ab5d51557da3434828c5dbfada371

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ipfs://ce78ad4e383609eb78dff556535c0aed7207188e508b1ab23f034c0a34f9ada1