// Sources flattened with hardhat v2.0.11 https://hardhat.org

// File @boringcrypto/boring-solidity/contracts/interfaces/IERC20.sol@v1.2.2

// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;

interface IERC20 {
    function totalSupply() external view returns (uint256);

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

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

    function approve(address spender, uint256 amount) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /// @notice EIP 2612
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;
}


// File @boringcrypto/boring-solidity/contracts/libraries/BoringERC20.sol@v1.2.2

pragma solidity 0.6.12;

// solhint-disable avoid-low-level-calls

library BoringERC20 {
    bytes4 private constant SIG_SYMBOL = 0x95d89b41; // symbol()
    bytes4 private constant SIG_NAME = 0x06fdde03; // name()
    bytes4 private constant SIG_DECIMALS = 0x313ce567; // decimals()
    bytes4 private constant SIG_TRANSFER = 0xa9059cbb; // transfer(address,uint256)
    bytes4 private constant SIG_TRANSFER_FROM = 0x23b872dd; // transferFrom(address,address,uint256)

    function returnDataToString(bytes memory data) internal pure returns (string memory) {
        if (data.length >= 64) {
            return abi.decode(data, (string));
        } else if (data.length == 32) {
            uint8 i = 0;
            while(i < 32 && data[i] != 0) {
                i++;
            }
            bytes memory bytesArray = new bytes(i);
            for (i = 0; i < 32 && data[i] != 0; i++) {
                bytesArray[i] = data[i];
            }
            return string(bytesArray);
        } else {
            return "???";
        }
    }

    /// @notice Provides a safe ERC20.symbol version which returns '???' as fallback string.
    /// @param token The address of the ERC-20 token contract.
    /// @return (string) Token symbol.
    function safeSymbol(IERC20 token) internal view returns (string memory) {
        (bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_SYMBOL));
        return success ? returnDataToString(data) : "???";
    }

    /// @notice Provides a safe ERC20.name version which returns '???' as fallback string.
    /// @param token The address of the ERC-20 token contract.
    /// @return (string) Token name.
    function safeName(IERC20 token) internal view returns (string memory) {
        (bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_NAME));
        return success ? returnDataToString(data) : "???";
    }

    /// @notice Provides a safe ERC20.decimals version which returns '18' as fallback value.
    /// @param token The address of the ERC-20 token contract.
    /// @return (uint8) Token decimals.
    function safeDecimals(IERC20 token) internal view returns (uint8) {
        (bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_DECIMALS));
        return success && data.length == 32 ? abi.decode(data, (uint8)) : 18;
    }

    /// @notice Provides a safe ERC20.transfer version for different ERC-20 implementations.
    /// Reverts on a failed transfer.
    /// @param token The address of the ERC-20 token.
    /// @param to Transfer tokens to.
    /// @param amount The token amount.
    function safeTransfer(
        IERC20 token,
        address to,
        uint256 amount
    ) internal {
        (bool success, bytes memory data) = address(token).call(abi.encodeWithSelector(SIG_TRANSFER, to, amount));
        require(success && (data.length == 0 || abi.decode(data, (bool))), "BoringERC20: Transfer failed");
    }

    /// @notice Provides a safe ERC20.transferFrom version for different ERC-20 implementations.
    /// Reverts on a failed transfer.
    /// @param token The address of the ERC-20 token.
    /// @param from Transfer tokens from.
    /// @param to Transfer tokens to.
    /// @param amount The token amount.
    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal {
        (bool success, bytes memory data) = address(token).call(abi.encodeWithSelector(SIG_TRANSFER_FROM, from, to, amount));
        require(success && (data.length == 0 || abi.decode(data, (bool))), "BoringERC20: TransferFrom failed");
    }
}


// File contracts/interfaces/IRewarder.sol


pragma solidity 0.6.12;

interface IRewarder {
    using BoringERC20 for IERC20;
    function onSushiReward(uint256 pid, address user, address recipient, uint256 sushiAmount, uint256 newLpAmount) external;
    function pendingTokens(uint256 pid, address user, uint256 sushiAmount) external view returns (IERC20[] memory, uint256[] memory);
}


// File @boringcrypto/boring-solidity/contracts/libraries/BoringMath.sol@v1.2.2

pragma solidity 0.6.12;

/// @notice A library for performing overflow-/underflow-safe math,
/// updated with awesomeness from of DappHub (https://github.com/dapphub/ds-math).
library BoringMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
        require((c = a + b) >= b, "BoringMath: Add Overflow");
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256 c) {
        require((c = a - b) <= a, "BoringMath: Underflow");
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
        require(b == 0 || (c = a * b) / b == a, "BoringMath: Mul Overflow");
    }

    function to128(uint256 a) internal pure returns (uint128 c) {
        require(a <= uint128(-1), "BoringMath: uint128 Overflow");
        c = uint128(a);
    }

    function to64(uint256 a) internal pure returns (uint64 c) {
        require(a <= uint64(-1), "BoringMath: uint64 Overflow");
        c = uint64(a);
    }

    function to32(uint256 a) internal pure returns (uint32 c) {
        require(a <= uint32(-1), "BoringMath: uint32 Overflow");
        c = uint32(a);
    }
}

/// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint128.
library BoringMath128 {
    function add(uint128 a, uint128 b) internal pure returns (uint128 c) {
        require((c = a + b) >= b, "BoringMath: Add Overflow");
    }

    function sub(uint128 a, uint128 b) internal pure returns (uint128 c) {
        require((c = a - b) <= a, "BoringMath: Underflow");
    }
}

/// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint64.
library BoringMath64 {
    function add(uint64 a, uint64 b) internal pure returns (uint64 c) {
        require((c = a + b) >= b, "BoringMath: Add Overflow");
    }

    function sub(uint64 a, uint64 b) internal pure returns (uint64 c) {
        require((c = a - b) <= a, "BoringMath: Underflow");
    }
}

/// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint32.
library BoringMath32 {
    function add(uint32 a, uint32 b) internal pure returns (uint32 c) {
        require((c = a + b) >= b, "BoringMath: Add Overflow");
    }

    function sub(uint32 a, uint32 b) internal pure returns (uint32 c) {
        require((c = a - b) <= a, "BoringMath: Underflow");
    }
}


// File @boringcrypto/boring-solidity/contracts/BoringOwnable.sol@v1.2.2

pragma solidity 0.6.12;

// Audit on 5-Jan-2021 by Keno and BoringCrypto
// Source: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol + Claimable.sol
// Edited by BoringCrypto

contract BoringOwnableData {
    address public owner;
    address public pendingOwner;
}

contract BoringOwnable is BoringOwnableData {
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /// @notice `owner` defaults to msg.sender on construction.
    constructor() public {
        owner = msg.sender;
        emit OwnershipTransferred(address(0), msg.sender);
    }

    /// @notice Transfers ownership to `newOwner`. Either directly or claimable by the new pending owner.
    /// Can only be invoked by the current `owner`.
    /// @param newOwner Address of the new owner.
    /// @param direct True if `newOwner` should be set immediately. False if `newOwner` needs to use `claimOwnership`.
    /// @param renounce Allows the `newOwner` to be `address(0)` if `direct` and `renounce` is True. Has no effect otherwise.
    function transferOwnership(
        address newOwner,
        bool direct,
        bool renounce
    ) public onlyOwner {
        if (direct) {
            // Checks
            require(newOwner != address(0) || renounce, "Ownable: zero address");

            // Effects
            emit OwnershipTransferred(owner, newOwner);
            owner = newOwner;
            pendingOwner = address(0);
        } else {
            // Effects
            pendingOwner = newOwner;
        }
    }

    /// @notice Needs to be called by `pendingOwner` to claim ownership.
    function claimOwnership() public {
        address _pendingOwner = pendingOwner;

        // Checks
        require(msg.sender == _pendingOwner, "Ownable: caller != pending owner");

        // Effects
        emit OwnershipTransferred(owner, _pendingOwner);
        owner = _pendingOwner;
        pendingOwner = address(0);
    }

    /// @notice Only allows the `owner` to execute the function.
    modifier onlyOwner() {
        require(msg.sender == owner, "Ownable: caller is not the owner");
        _;
    }
}


// File contracts/mocks/CloneRewarderTime.sol

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;




interface IMasterChefV2 {
    function lpToken(uint256 pid) external view returns (IERC20 _lpToken); 
}

/// @author @0xKeno
contract NearRewarder is IRewarder, BoringOwnable{
    using BoringMath for uint256;
    using BoringMath128 for uint128;
    using BoringERC20 for IERC20;

    IERC20 public rewardToken;

    /// @notice Info of each MCV2 user.
    /// `amount` LP token amount the user has provided.
    /// `rewardDebt` The amount of SUSHI entitled to the user.
    struct UserInfo {
        uint256 amount;
        uint256 rewardDebt;
    }

    /// @notice Info of each MCV2 pool.
    /// `allocPoint` The amount of allocation points assigned to the pool.
    /// Also known as the amount of SUSHI to distribute per block.
    struct PoolInfo {
        uint128 accSushiPerShare;
        uint64 lastRewardTime;
    }

    /// @notice Info of each pool.
    mapping (uint256 => PoolInfo) public poolInfo;


    /// @notice Info of each user that stakes LP tokens.
    mapping (uint256 => mapping (address => UserInfo)) public userInfo;

    uint256 public rewardPerSecond;
    IERC20 public masterLpToken;
    uint256 private constant ACC_TOKEN_PRECISION = 1e12;

    address public immutable MASTERCHEF_V2;

    event LogOnReward(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
    event LogPoolAddition(uint256 indexed pid, uint256 allocPoint);
    event LogSetPool(uint256 indexed pid, uint256 allocPoint);
    event LogUpdatePool(uint256 indexed pid, uint64 lastRewardTime, uint256 lpSupply, uint256 accSushiPerShare);
    event LogRewardPerSecond(uint256 rewardPerSecond);
    event LogInit();

    constructor (address _MASTERCHEF_V2) public {
        MASTERCHEF_V2 = _MASTERCHEF_V2;
    }

    /// @notice Serves as the constructor for clones, as clones can't have a regular constructor
    /// @dev `data` is abi encoded in the format: (IERC20 collateral, IERC20 asset, IOracle oracle, bytes oracleData)
    function init(bytes calldata data) public payable {
        require(rewardToken == IERC20(0), "Rewarder: already initialized");
        (rewardToken, owner, rewardPerSecond, masterLpToken) = abi.decode(data, (IERC20, address, uint256, IERC20));
        require(rewardToken != IERC20(0), "Rewarder: bad token");
        emit LogInit();
    }

    function onSushiReward (uint256 pid, address _user, address to, uint256, uint256 lpToken) onlyMCV2 override external {
        require(IMasterChefV2(MASTERCHEF_V2).lpToken(pid) == masterLpToken);

        PoolInfo memory pool = updatePool(pid);
        UserInfo storage user = userInfo[pid][_user];
        uint256 pending;
        if (user.amount > 0) {
            pending =
                (user.amount.mul(pool.accSushiPerShare) / ACC_TOKEN_PRECISION).sub(
                    user.rewardDebt
                );
            rewardToken.safeTransfer(to, pending);
        }
        user.amount = lpToken;
        user.rewardDebt = lpToken.mul(pool.accSushiPerShare) / ACC_TOKEN_PRECISION;
        emit LogOnReward(_user, pid, pending, to);
    }
    
    function pendingTokens(uint256 pid, address user, uint256) override external view returns (IERC20[] memory rewardTokens, uint256[] memory rewardAmounts) {
        IERC20[] memory _rewardTokens = new IERC20[](1);
        _rewardTokens[0] = (rewardToken);
        uint256[] memory _rewardAmounts = new uint256[](1);
        _rewardAmounts[0] = pendingToken(pid, user);
        return (_rewardTokens, _rewardAmounts);
    }

    /// @notice Sets the sushi per second to be distributed. Can only be called by the owner.
    /// @param _rewardPerSecond The amount of Sushi to be distributed per second.
    function setRewardPerSecond(uint256 _rewardPerSecond) public onlyOwner {
        rewardPerSecond = _rewardPerSecond;
        emit LogRewardPerSecond(_rewardPerSecond);
    }

    modifier onlyMCV2 {
        require(
            msg.sender == MASTERCHEF_V2,
            "Only MCV2 can call this function."
        );
        _;
    }

    /// @notice View function to see pending Token
    /// @param _pid The index of the pool. See `poolInfo`.
    /// @param _user Address of user.
    /// @return pending SUSHI reward for a given user.
    function pendingToken(uint256 _pid, address _user) public view returns (uint256 pending) {
        PoolInfo memory pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accSushiPerShare = pool.accSushiPerShare;
        uint256 lpSupply = IMasterChefV2(MASTERCHEF_V2).lpToken(_pid).balanceOf(MASTERCHEF_V2);
        if (block.timestamp > pool.lastRewardTime && lpSupply != 0) {
            uint256 time = block.timestamp.sub(pool.lastRewardTime);
            uint256 sushiReward = time.mul(rewardPerSecond);
            accSushiPerShare = accSushiPerShare.add(sushiReward.mul(ACC_TOKEN_PRECISION) / lpSupply);
        }
        pending = (user.amount.mul(accSushiPerShare) / ACC_TOKEN_PRECISION).sub(user.rewardDebt);
    }

    /// @notice Update reward variables of the given pool.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @return pool Returns the pool that was updated.
    function updatePool(uint256 pid) public returns (PoolInfo memory pool) {
        pool = poolInfo[pid];
        if (block.timestamp > pool.lastRewardTime) {
            uint256 lpSupply = IMasterChefV2(MASTERCHEF_V2).lpToken(pid).balanceOf(MASTERCHEF_V2);

            if (lpSupply > 0) {
                uint256 time = block.timestamp.sub(pool.lastRewardTime);
                uint256 sushiReward = time.mul(rewardPerSecond);
                pool.accSushiPerShare = pool.accSushiPerShare.add((sushiReward.mul(ACC_TOKEN_PRECISION) / lpSupply).to128());
            }
            pool.lastRewardTime = block.timestamp.to64();
            poolInfo[pid] = pool;
            emit LogUpdatePool(pid, pool.lastRewardTime, lpSupply, pool.accSushiPerShare);
        }
    }
}