Token SmarterCoin

// SPDX-License-Identifier: MIT

/**
 *Submitted for verification at Etherscan.io on 2020-10-09
 */

pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "../interfaces/IFactory.sol";

interface IERC20 {
    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint256);

    function totalSupply() external view returns (uint256);

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

    function transfer(address recipient, uint256 amount)
        external
        returns (bool);

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

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

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    function owner() external view returns (address);

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

library BoringERC20 {
    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 "???";
        }
    }

    function symbol(IERC20 token) internal view returns (string memory) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeWithSelector(0x95d89b41)
        );
        return success ? returnDataToString(data) : "???";
    }

    function name(IERC20 token) internal view returns (string memory) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeWithSelector(0x06fdde03)
        );
        return success ? returnDataToString(data) : "???";
    }

    function decimals(IERC20 token) internal view returns (uint8) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeWithSelector(0x313ce567)
        );
        return success && data.length == 32 ? abi.decode(data, (uint8)) : 18;
    }

    function DOMAIN_SEPARATOR(IERC20 token) internal view returns (bytes32) {
        (bool success, bytes memory data) = address(token).staticcall{
            gas: 10000
        }(abi.encodeWithSelector(0x3644e515));
        return
            success && data.length == 32
                ? abi.decode(data, (bytes32))
                : bytes32(0);
    }

    function nonces(IERC20 token, address owner)
        internal
        view
        returns (uint256)
    {
        (bool success, bytes memory data) = address(token).staticcall{
            gas: 5000
        }(abi.encodeWithSelector(0x7ecebe00, owner));
        return
            success && data.length == 32
                ? abi.decode(data, (uint256))
                : uint256(-1); // Use max uint256 to signal failure to retrieve nonce (probably not supported)
    }
}

interface IMasterChef {
    function BONUS_MULTIPLIER() external view returns (uint256);

    function devaddr() external view returns (address);

    function owner() external view returns (address);

    function startTimestamp() external view returns (uint256);

    function joe() external view returns (address);

    function joePerSec() external view returns (uint256);

    function totalAllocPoint() external view returns (uint256);

    function poolLength() external view returns (uint256);

    function poolInfo(uint256 nr)
        external
        view
        returns (
            address,
            uint256,
            uint256,
            uint256
        );

    function userInfo(uint256 nr, address who)
        external
        view
        returns (uint256, uint256);

    function pendingTokens(uint256 pid, address who)
        external
        view
        returns (
            uint256,
            address,
            string memory,
            uint256
        );
}

interface IPair is IERC20 {
    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (
            uint112,
            uint112,
            uint32
        );
}

contract BoringCryptoDashboardV2 {
    using SafeMath for uint256;

    struct PairFull {
        address token;
        address token0;
        address token1;
        uint256 reserve0;
        uint256 reserve1;
        uint256 totalSupply;
        uint256 balance;
    }

    function getPairsFull(address who, address[] calldata addresses)
        public
        view
        returns (PairFull[] memory)
    {
        PairFull[] memory pairs = new PairFull[](addresses.length);
        for (uint256 i = 0; i < addresses.length; i++) {
            address token = addresses[i];
            pairs[i].token = token;
            pairs[i].token0 = IPair(token).token0();
            pairs[i].token1 = IPair(token).token1();
            (uint256 reserve0, uint256 reserve1, ) = IPair(token).getReserves();
            pairs[i].reserve0 = reserve0;
            pairs[i].reserve1 = reserve1;
            pairs[i].balance = IERC20(token).balanceOf(who);
            pairs[i].totalSupply = IERC20(token).totalSupply();
        }
        return pairs;
    }

    struct PoolsInfo {
        uint256 totalAllocPoint;
        uint256 poolLength;
    }

    struct PoolInfo {
        uint256 pid;
        IPair lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this pool. SUSHIs to distribute per block.
        address token0;
        address token1;
    }

    IMasterChef chef;
    IFactory pangolinFactory;
    IFactory joeFactory;
    address wavax;

    constructor(
        address _chef,
        address _pangolinFactory,
        address _joeFactory,
        address _wavax
    ) public {
        chef = IMasterChef(_chef);
        pangolinFactory = IFactory(_pangolinFactory);
        joeFactory = IFactory(_joeFactory);
        wavax = _wavax;
    }

    function getPools(uint256[] calldata pids)
        public
        view
        returns (PoolsInfo memory, PoolInfo[] memory)
    {
        PoolsInfo memory info;
        info.totalAllocPoint = chef.totalAllocPoint();
        uint256 poolLength = chef.poolLength();
        info.poolLength = poolLength;

        PoolInfo[] memory pools = new PoolInfo[](pids.length);

        for (uint256 i = 0; i < pids.length; i++) {
            pools[i].pid = pids[i];
            (address lpToken, uint256 allocPoint, , ) = chef.poolInfo(pids[i]);
            IPair pair = IPair(lpToken);
            pools[i].lpToken = pair;
            pools[i].allocPoint = allocPoint;

            pools[i].token0 = pair.token0();
            pools[i].token1 = pair.token1();
        }
        return (info, pools);
    }

    function findPools(address who, uint256[] calldata pids)
        public
        view
        returns (PoolInfo[] memory)
    {
        uint256 count;

        for (uint256 i = 0; i < pids.length; i++) {
            (uint256 balance, ) = chef.userInfo(pids[i], who);
            if (balance > 0) {
                count++;
            }
        }

        PoolInfo[] memory pools = new PoolInfo[](count);

        count = 0;
        for (uint256 i = 0; i < pids.length; i++) {
            (uint256 balance, ) = chef.userInfo(pids[i], who);
            if (balance > 0) {
                pools[count].pid = pids[i];
                (address lpToken, uint256 allocPoint, , ) = chef.poolInfo(
                    pids[i]
                );
                IPair pair = IPair(lpToken);
                pools[count].lpToken = pair;
                pools[count].allocPoint = allocPoint;

                pools[count].token0 = pair.token0();
                pools[count].token1 = pair.token1();
                count++;
            }
        }

        return pools;
    }

    function getAVAXRate(address token) public view returns (uint256) {
        uint256 avax_rate = 1e18;
        if (token != wavax) {
            IPair pairPangolin;
            IPair pairJoe;
            pairPangolin = IPair(
                IFactory(pangolinFactory).getPair(token, wavax)
            );
            pairJoe = IPair(IFactory(joeFactory).getPair(token, wavax));
            if (
                address(pairPangolin) == address(0) &&
                address(pairJoe) == address(0)
            ) {
                return 0;
            }

            uint112 reserve0Pangolin;
            uint112 reserve1Pangolin;
            uint112 reserve0Joe;
            uint112 reserve1Joe;

            if (address(pairPangolin) != address(0)) {
                (reserve0Pangolin, reserve1Pangolin, ) = pairPangolin
                .getReserves();
            }
            if (address(pairJoe) != address(0)) {
                (reserve0Joe, reserve1Joe, ) = pairJoe.getReserves();
            }

            if (
                address(pairJoe) == address(0) ||
                reserve0Pangolin > reserve0Joe ||
                reserve1Pangolin > reserve1Joe
            ) {
                if (pairPangolin.token0() == wavax) {
                    avax_rate = uint256(reserve1Pangolin).mul(1e18).div(
                        reserve0Pangolin
                    );
                } else {
                    avax_rate = uint256(reserve0Pangolin).mul(1e18).div(
                        reserve1Pangolin
                    );
                }
            } else {
                if (pairJoe.token0() == wavax) {
                    avax_rate = uint256(reserve1Joe).mul(1e18).div(reserve0Joe);
                } else {
                    avax_rate = uint256(reserve0Joe).mul(1e18).div(reserve1Joe);
                }
            }
        }
        return avax_rate;
    }

    struct UserPoolInfo {
        uint256 pid;
        uint256 balance; // Balance of pool tokens
        uint256 totalSupply; // Token staked lp tokens
        uint256 lpBalance; // Balance of lp tokens not staked
        uint256 lpTotalSupply; // TotalSupply of lp tokens
        uint256 lpAllowance; // LP tokens approved for masterchef
        uint256 reserve0;
        uint256 reserve1;
        uint256 token0rate;
        uint256 token1rate;
        uint256 rewardDebt;
        uint256 pending; // Pending JOE
    }

    function pollPools(address who, uint256[] calldata pids)
        public
        view
        returns (UserPoolInfo[] memory)
    {
        UserPoolInfo[] memory pools = new UserPoolInfo[](pids.length);

        for (uint256 i = 0; i < pids.length; i++) {
            (uint256 amount, ) = chef.userInfo(pids[i], who);
            pools[i].balance = amount;
            (uint256 pendingJoe, , , ) = chef.pendingTokens(pids[i], who);
            pools[i].pending = pendingJoe;

            (address lpToken, , , ) = chef.poolInfo(pids[i]);
            pools[i].pid = pids[i];
            IPair pair = IPair(lpToken);
            pools[i].totalSupply = pair.balanceOf(address(chef));
            pools[i].lpAllowance = pair.allowance(who, address(chef));
            pools[i].lpBalance = pair.balanceOf(who);
            pools[i].lpTotalSupply = pair.totalSupply();
            pools[i].token0rate = getAVAXRate(pair.token0());
            pools[i].token1rate = getAVAXRate(pair.token1());

            (uint112 reserve0, uint112 reserve1, ) = pair.getReserves();
            pools[i].reserve0 = reserve0;
            pools[i].reserve1 = reserve1;
        }
        return pools;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../utils/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 () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

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

// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

interface IFactory {
    function allPairsLength() external view returns (uint256);

    function allPairs(uint256 i) external view returns (address);

    function getPair(address token0, address token1)
        external
        view
        returns (address);

    function feeTo() external view returns (address);

    function feeToSetter() external view returns (address);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <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 GSN 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 payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

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

import "../interfaces/IPair.sol";
import "../interfaces/IFactory.sol";

library BoringPair {
    function factory(IPair pair) internal view returns (IFactory) {
        (bool success, bytes memory data) = address(pair).staticcall(
            abi.encodeWithSelector(0xc45a0155)
        );
        return
            success && data.length == 32
                ? abi.decode(data, (IFactory))
                : IFactory(0);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "./IERC20.sol";

interface IPair is IERC20 {
    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (
            uint112,
            uint112,
            uint32
        );
}

// 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
    );

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

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

import "@openzeppelin/contracts/math/SafeMath.sol";
import "./interfaces/IPair.sol";
import "./interfaces/IBar.sol";

interface IMasterChef {
    function userInfo(uint256 pid, address owner)
        external
        view
        returns (uint256, uint256);
}

contract JoeVote {
    using SafeMath for uint256;

    IPair pair; // JOE-AVAX LP
    IBar bar;
    IERC20 joe;
    IMasterChef chef;
    uint256 pid; // Pool ID of the JOE-AVAX LP in MasterChefV2

    function name() public pure returns (string memory) {
        return "JoeVote";
    }

    function symbol() public pure returns (string memory) {
        return "JOEVOTE";
    }

    function decimals() public pure returns (uint8) {
        return 18;
    }

    constructor(
        address _pair,
        address _bar,
        address _joe,
        address _chef,
        uint256 _pid
    ) public {
        pair = IPair(_pair);
        bar = IBar(_bar);
        joe = IERC20(_joe);
        chef = IMasterChef(_chef);
        pid = _pid;
    }

    function totalSupply() public view returns (uint256) {
        (uint256 lp_totalJoe, , ) = pair.getReserves();
        uint256 xjoe_totalJoe = joe.balanceOf(address(bar));

        return lp_totalJoe.mul(2).add(xjoe_totalJoe);
    }

    function balanceOf(address owner) public view returns (uint256) {
        //////////////////////////
        // Get balance from LPs //
        //////////////////////////
        uint256 lp_totalJoe = joe.balanceOf(address(pair));
        uint256 lp_total = pair.totalSupply();
        uint256 lp_balance = pair.balanceOf(owner);

        // Add staked balance
        (uint256 lp_stakedBalance, ) = chef.userInfo(pid, owner);
        lp_balance = lp_balance.add(lp_stakedBalance);

        // LP voting power is 2x the users JOE share in the pool.
        uint256 lp_powah = lp_totalJoe.mul(lp_balance).div(lp_total).mul(2);

        ///////////////////////////
        // Get balance from xJOE //
        ///////////////////////////

        uint256 xjoe_balance = bar.balanceOf(owner);
        uint256 xjoe_total = bar.totalSupply();
        uint256 xjoe_totalJoe = joe.balanceOf(address(bar));

        // xJOE voting power is the users JOE share in the bar
        uint256 xjoe_powah = xjoe_totalJoe.mul(xjoe_balance).div(xjoe_total);

        //////////////////////////
        // Get balance from JOE //
        //////////////////////////

        uint256 joe_balance = joe.balanceOf(owner);

        return lp_powah.add(xjoe_powah).add(joe_balance);
    }

    function allowance(address, address) public pure returns (uint256) {
        return 0;
    }

    function transfer(address, uint256) public pure returns (bool) {
        return false;
    }

    function approve(address, uint256) public pure returns (bool) {
        return false;
    }

    function transferFrom(
        address,
        address,
        uint256
    ) public pure returns (bool) {
        return false;
    }
}

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

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

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

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

/*
 * Trader Joe
 * MIT License; modified from PancakeBunny
 *
 */

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";

import "./traderjoe/interfaces/IJoePair.sol";
import "./traderjoe/interfaces/IJoeRouter02.sol";
import "./traderjoe/interfaces/IWAVAX.sol";

contract Zap is OwnableUpgradeable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    /* ========== CONSTANT VARIABLES ========== */

    address public JOE;
    address public constant USDT = 0xde3A24028580884448a5397872046a019649b084;
    address public constant DAI = 0xbA7dEebBFC5fA1100Fb055a87773e1E99Cd3507a;
    address public constant WAVAX = 0xB31f66AA3C1e785363F0875A1B74E27b85FD66c7;

    IJoeRouter02 private ROUTER;

    /* ========== STATE VARIABLES ========== */

    mapping(address => bool) private notLP;
    mapping(address => address) private routePairAddresses;
    address[] public tokens;

    /* ========== INITIALIZER ========== */

    function initialize(address _joe, address _router) external initializer {
        __Ownable_init();
        require(owner() != address(0), "ZapETH: owner must be set");

        JOE = _joe;
        ROUTER = IJoeRouter02(_router);
        setNotLP(WAVAX);
        setNotLP(USDT);
        setNotLP(JOE);
        setNotLP(DAI);
    }

    receive() external payable {}

    /* ========== View Functions ========== */

    function isLP(address _address) public view returns (bool) {
        return !notLP[_address];
    }

    function routePair(address _address) external view returns (address) {
        return routePairAddresses[_address];
    }

    /* ========== External Functions ========== */

    function zapInToken(
        address _from,
        uint256 amount,
        address _to
    ) external {
        IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
        _approveTokenIfNeeded(_from);

        if (isLP(_to)) {
            IJoePair pair = IJoePair(_to);
            address token0 = pair.token0();
            address token1 = pair.token1();
            if (_from == token0 || _from == token1) {
                // swap half amount for other
                address other = _from == token0 ? token1 : token0;
                _approveTokenIfNeeded(other);
                uint256 sellAmount = amount.div(2);
                uint256 otherAmount = _swap(
                    _from,
                    sellAmount,
                    other,
                    address(this)
                );
                ROUTER.addLiquidity(
                    _from,
                    other,
                    amount.sub(sellAmount),
                    otherAmount,
                    0,
                    0,
                    msg.sender,
                    block.timestamp
                );
            } else {
                uint256 avaxAmount = _swapTokenForAVAX(
                    _from,
                    amount,
                    address(this)
                );
                _swapAVAXToLP(_to, avaxAmount, msg.sender);
            }
        } else {
            _swap(_from, amount, _to, msg.sender);
        }
    }

    function zapIn(address _to) external payable {
        _swapAVAXToLP(_to, msg.value, msg.sender);
    }

    function zapOut(address _from, uint256 amount) external {
        IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
        _approveTokenIfNeeded(_from);

        if (!isLP(_from)) {
            _swapTokenForAVAX(_from, amount, msg.sender);
        } else {
            IJoePair pair = IJoePair(_from);
            address token0 = pair.token0();
            address token1 = pair.token1();
            if (token0 == WAVAX || token1 == WAVAX) {
                ROUTER.removeLiquidityAVAX(
                    token0 != WAVAX ? token0 : token1,
                    amount,
                    0,
                    0,
                    msg.sender,
                    block.timestamp
                );
            } else {
                ROUTER.removeLiquidity(
                    token0,
                    token1,
                    amount,
                    0,
                    0,
                    msg.sender,
                    block.timestamp
                );
            }
        }
    }

    /* ========== Private Functions ========== */

    function _approveTokenIfNeeded(address token) private {
        if (IERC20(token).allowance(address(this), address(ROUTER)) == 0) {
            IERC20(token).safeApprove(address(ROUTER), uint256(~0));
        }
    }

    function _swapAVAXToLP(
        address lp,
        uint256 amount,
        address receiver
    ) private {
        if (!isLP(lp)) {
            _swapAVAXForToken(lp, amount, receiver);
        } else {
            // lp
            IJoePair pair = IJoePair(lp);
            address token0 = pair.token0();
            address token1 = pair.token1();
            if (token0 == WAVAX || token1 == WAVAX) {
                address token = token0 == WAVAX ? token1 : token0;
                uint256 swapValue = amount.div(2);
                uint256 tokenAmount = _swapAVAXForToken(
                    token,
                    swapValue,
                    address(this)
                );

                _approveTokenIfNeeded(token);
                ROUTER.addLiquidityAVAX{value: amount.sub(swapValue)}(
                    token,
                    tokenAmount,
                    0,
                    0,
                    receiver,
                    block.timestamp
                );
            } else {
                uint256 swapValue = amount.div(2);
                uint256 token0Amount = _swapAVAXForToken(
                    token0,
                    swapValue,
                    address(this)
                );
                uint256 token1Amount = _swapAVAXForToken(
                    token1,
                    amount.sub(swapValue),
                    address(this)
                );

                _approveTokenIfNeeded(token0);
                _approveTokenIfNeeded(token1);
                ROUTER.addLiquidity(
                    token0,
                    token1,
                    token0Amount,
                    token1Amount,
                    0,
                    0,
                    receiver,
                    block.timestamp
                );
            }
        }
    }

    function _swapAVAXForToken(
        address token,
        uint256 value,
        address receiver
    ) private returns (uint256) {
        address[] memory path;

        if (routePairAddresses[token] != address(0)) {
            path = new address[](3);
            path[0] = WAVAX;
            path[1] = routePairAddresses[token];
            path[2] = token;
        } else {
            path = new address[](2);
            path[0] = WAVAX;
            path[1] = token;
        }

        uint256[] memory amounts = ROUTER.swapExactAVAXForTokens{value: value}(
            0,
            path,
            receiver,
            block.timestamp
        );
        return amounts[amounts.length - 1];
    }

    function _swapTokenForAVAX(
        address token,
        uint256 amount,
        address receiver
    ) private returns (uint256) {
        address[] memory path;
        if (routePairAddresses[token] != address(0)) {
            path = new address[](3);
            path[0] = token;
            path[1] = routePairAddresses[token];
            path[2] = WAVAX;
        } else {
            path = new address[](2);
            path[0] = token;
            path[1] = WAVAX;
        }

        uint256[] memory amounts = ROUTER.swapExactTokensForAVAX(
            amount,
            0,
            path,
            receiver,
            block.timestamp
        );
        return amounts[amounts.length - 1];
    }

    function _swap(
        address _from,
        uint256 amount,
        address _to,
        address receiver
    ) private returns (uint256) {
        address intermediate = routePairAddresses[_from];
        if (intermediate == address(0)) {
            intermediate = routePairAddresses[_to];
        }

        address[] memory path;
        if (intermediate != address(0) && (_from == WAVAX || _to == WAVAX)) {
            // [WAVAX, BUSD, VAI] or [VAI, BUSD, WAVAX]
            path = new address[](3);
            path[0] = _from;
            path[1] = intermediate;
            path[2] = _to;
        } else if (
            intermediate != address(0) &&
            (_from == intermediate || _to == intermediate)
        ) {
            // [VAI, BUSD] or [BUSD, VAI]
            path = new address[](2);
            path[0] = _from;
            path[1] = _to;
        } else if (
            intermediate != address(0) &&
            routePairAddresses[_from] == routePairAddresses[_to]
        ) {
            // [VAI, DAI] or [VAI, USDC]
            path = new address[](3);
            path[0] = _from;
            path[1] = intermediate;
            path[2] = _to;
        } else if (
            routePairAddresses[_from] != address(0) &&
            routePairAddresses[_to] != address(0) &&
            routePairAddresses[_from] != routePairAddresses[_to]
        ) {
            // routePairAddresses[xToken] = xRoute
            // [VAI, BUSD, WAVAX, xRoute, xToken]
            path = new address[](5);
            path[0] = _from;
            path[1] = routePairAddresses[_from];
            path[2] = WAVAX;
            path[3] = routePairAddresses[_to];
            path[4] = _to;
        } else if (
            intermediate != address(0) &&
            routePairAddresses[_from] != address(0)
        ) {
            // [VAI, BUSD, WAVAX, BUNNY]
            path = new address[](4);
            path[0] = _from;
            path[1] = intermediate;
            path[2] = WAVAX;
            path[3] = _to;
        } else if (
            intermediate != address(0) && routePairAddresses[_to] != address(0)
        ) {
            // [BUNNY, WAVAX, BUSD, VAI]
            path = new address[](4);
            path[0] = _from;
            path[1] = WAVAX;
            path[2] = intermediate;
            path[3] = _to;
        } else if (_from == WAVAX || _to == WAVAX) {
            // [WAVAX, BUNNY] or [BUNNY, WAVAX]
            path = new address[](2);
            path[0] = _from;
            path[1] = _to;
        } else {
            // [USDT, BUNNY] or [BUNNY, USDT]
            path = new address[](3);
            path[0] = _from;
            path[1] = WAVAX;
            path[2] = _to;
        }

        uint256[] memory amounts = ROUTER.swapExactTokensForTokens(
            amount,
            0,
            path,
            receiver,
            block.timestamp
        );
        return amounts[amounts.length - 1];
    }

    /* ========== RESTRICTED FUNCTIONS ========== */

    function setRoutePairAddress(address asset, address route)
        external
        onlyOwner
    {
        routePairAddresses[asset] = route;
    }

    function setNotLP(address token) public onlyOwner {
        bool needPush = notLP[token] == false;
        notLP[token] = true;
        if (needPush) {
            tokens.push(token);
        }
    }

    function removeToken(uint256 i) external onlyOwner {
        address token = tokens[i];
        notLP[token] = false;
        tokens[i] = tokens[tokens.length - 1];
        tokens.pop();
    }

    function sweep() external onlyOwner {
        for (uint256 i = 0; i < tokens.length; i++) {
            address token = tokens[i];
            if (token == address(0)) continue;
            uint256 amount = IERC20(token).balanceOf(address(this));
            if (amount > 0) {
                if (token == WAVAX) {
                    IWAVAX(token).withdraw(amount);
                } else {
                    _swapTokenForAVAX(token, amount, owner());
                }
            }
        }

        uint256 balance = address(this).balance;
        if (balance > 0) {
            payable(owner()).transfer(balance);
        }
    }

    function withdraw(address token) external onlyOwner {
        if (token == address(0)) {
            payable(owner()).transfer(address(this).balance);
            return;
        }

        IERC20(token).transfer(owner(), IERC20(token).balanceOf(address(this)));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../GSN/ContextUpgradeable.sol";
import "../proxy/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal initializer {
        __Context_init_unchained();
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal initializer {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
    uint256[49] private __gap;
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.5.0;

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

    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint256);

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

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

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

    function transfer(address to, uint256 value) external returns (bool);

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

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint256);

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    event Mint(address indexed sender, uint256 amount0, uint256 amount1);
    event Burn(
        address indexed sender,
        uint256 amount0,
        uint256 amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint256 amount0In,
        uint256 amount1In,
        uint256 amount0Out,
        uint256 amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint256);

    function factory() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (
            uint112 reserve0,
            uint112 reserve1,
            uint32 blockTimestampLast
        );

    function price0CumulativeLast() external view returns (uint256);

    function price1CumulativeLast() external view returns (uint256);

    function kLast() external view returns (uint256);

    function mint(address to) external returns (uint256 liquidity);

    function burn(address to)
        external
        returns (uint256 amount0, uint256 amount1);

    function swap(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external;

    function skim(address to) external;

    function sync() external;

    function initialize(address, address) external;
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.6.2;

import "./IJoeRouter01.sol";

interface IJoeRouter02 is IJoeRouter01 {
    function removeLiquidityAVAXSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountAVAXMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountAVAX);

    function removeLiquidityAVAXWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountAVAXMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountAVAX);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function swapExactAVAXForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForAVAXSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.5.0;

interface IWAVAX {
    function deposit() external payable;

    function transfer(address to, uint256 value) external returns (bool);

    function withdraw(uint256) external;
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.2 <0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;
import "../proxy/Initializable.sol";

/*
 * @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 GSN 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 ContextUpgradeable is Initializable {
    function __Context_init() internal initializer {
        __Context_init_unchained();
    }

    function __Context_init_unchained() internal initializer {
    }
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT

// solhint-disable-next-line compiler-version
pragma solidity >=0.4.24 <0.8.0;


/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 * 
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
 * 
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 */
abstract contract Initializable {

    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }

    /// @dev Returns true if and only if the function is running in the constructor
    function _isConstructor() private view returns (bool) {
        // extcodesize checks the size of the code stored in an address, and
        // address returns the current address. Since the code is still not
        // deployed when running a constructor, any checks on its code size will
        // yield zero, making it an effective way to detect if a contract is
        // under construction or not.
        address self = address(this);
        uint256 cs;
        // solhint-disable-next-line no-inline-assembly
        assembly { cs := extcodesize(self) }
        return cs == 0;
    }
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.6.2;

interface IJoeRouter01 {
    function factory() external pure returns (address);

    function WAVAX() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    )
        external
        returns (
            uint256 amountA,
            uint256 amountB,
            uint256 liquidity
        );

    function addLiquidityAVAX(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountAVAXMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountAVAX,
            uint256 liquidity
        );

    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityAVAX(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountAVAXMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountToken, uint256 amountAVAX);

    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityAVAXWithPermit(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountAVAXMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountToken, uint256 amountAVAX);

    function swapExactTokensForTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapTokensForExactTokens(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactAVAXForTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function swapTokensForExactAVAX(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactTokensForAVAX(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapAVAXForExactTokens(
        uint256 amountOut,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function quote(
        uint256 amountA,
        uint256 reserveA,
        uint256 reserveB
    ) external pure returns (uint256 amountB);

    function getAmountOut(
        uint256 amountIn,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountOut);

    function getAmountIn(
        uint256 amountOut,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountIn);

    function getAmountsOut(uint256 amountIn, address[] calldata path)
        external
        view
        returns (uint256[] memory amounts);

    function getAmountsIn(uint256 amountOut, address[] calldata path)
        external
        view
        returns (uint256[] memory amounts);
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity =0.6.12;

import "./libraries/JoeLibrary.sol";
import "./libraries/SafeMath.sol";
import "./libraries/TransferHelper.sol";
import "./interfaces/IJoeRouter02.sol";
import "./interfaces/IJoeFactory.sol";
import "./interfaces/IERC20.sol";
import "./interfaces/IWAVAX.sol";

contract JoeRouter02 is IJoeRouter02 {
    using SafeMathJoe for uint256;

    address public immutable override factory;
    address public immutable override WAVAX;

    modifier ensure(uint256 deadline) {
        require(deadline >= block.timestamp, "JoeRouter: EXPIRED");
        _;
    }

    constructor(address _factory, address _WAVAX) public {
        factory = _factory;
        WAVAX = _WAVAX;
    }

    receive() external payable {
        assert(msg.sender == WAVAX); // only accept AVAX via fallback from the WAVAX contract
    }

    // **** ADD LIQUIDITY ****
    function _addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin
    ) internal virtual returns (uint256 amountA, uint256 amountB) {
        // create the pair if it doesn't exist yet
        if (IJoeFactory(factory).getPair(tokenA, tokenB) == address(0)) {
            IJoeFactory(factory).createPair(tokenA, tokenB);
        }
        (uint256 reserveA, uint256 reserveB) = JoeLibrary.getReserves(
            factory,
            tokenA,
            tokenB
        );
        if (reserveA == 0 && reserveB == 0) {
            (amountA, amountB) = (amountADesired, amountBDesired);
        } else {
            uint256 amountBOptimal = JoeLibrary.quote(
                amountADesired,
                reserveA,
                reserveB
            );
            if (amountBOptimal <= amountBDesired) {
                require(
                    amountBOptimal >= amountBMin,
                    "JoeRouter: INSUFFICIENT_B_AMOUNT"
                );
                (amountA, amountB) = (amountADesired, amountBOptimal);
            } else {
                uint256 amountAOptimal = JoeLibrary.quote(
                    amountBDesired,
                    reserveB,
                    reserveA
                );
                assert(amountAOptimal <= amountADesired);
                require(
                    amountAOptimal >= amountAMin,
                    "JoeRouter: INSUFFICIENT_A_AMOUNT"
                );
                (amountA, amountB) = (amountAOptimal, amountBDesired);
            }
        }
    }

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    )
        external
        virtual
        override
        ensure(deadline)
        returns (
            uint256 amountA,
            uint256 amountB,
            uint256 liquidity
        )
    {
        (amountA, amountB) = _addLiquidity(
            tokenA,
            tokenB,
            amountADesired,
            amountBDesired,
            amountAMin,
            amountBMin
        );
        address pair = JoeLibrary.pairFor(factory, tokenA, tokenB);
        TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
        TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
        liquidity = IJoePair(pair).mint(to);
    }

    function addLiquidityAVAX(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountAVAXMin,
        address to,
        uint256 deadline
    )
        external
        payable
        virtual
        override
        ensure(deadline)
        returns (
            uint256 amountToken,
            uint256 amountAVAX,
            uint256 liquidity
        )
    {
        (amountToken, amountAVAX) = _addLiquidity(
            token,
            WAVAX,
            amountTokenDesired,
            msg.value,
            amountTokenMin,
            amountAVAXMin
        );
        address pair = JoeLibrary.pairFor(factory, token, WAVAX);
        TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
        IWAVAX(WAVAX).deposit{value: amountAVAX}();
        assert(IWAVAX(WAVAX).transfer(pair, amountAVAX));
        liquidity = IJoePair(pair).mint(to);
        // refund dust eth, if any
        if (msg.value > amountAVAX)
            TransferHelper.safeTransferAVAX(msg.sender, msg.value - amountAVAX);
    }

    // **** REMOVE LIQUIDITY ****
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    )
        public
        virtual
        override
        ensure(deadline)
        returns (uint256 amountA, uint256 amountB)
    {
        address pair = JoeLibrary.pairFor(factory, tokenA, tokenB);
        IJoePair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair
        (uint256 amount0, uint256 amount1) = IJoePair(pair).burn(to);
        (address token0, ) = JoeLibrary.sortTokens(tokenA, tokenB);
        (amountA, amountB) = tokenA == token0
            ? (amount0, amount1)
            : (amount1, amount0);
        require(amountA >= amountAMin, "JoeRouter: INSUFFICIENT_A_AMOUNT");
        require(amountB >= amountBMin, "JoeRouter: INSUFFICIENT_B_AMOUNT");
    }

    function removeLiquidityAVAX(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountAVAXMin,
        address to,
        uint256 deadline
    )
        public
        virtual
        override
        ensure(deadline)
        returns (uint256 amountToken, uint256 amountAVAX)
    {
        (amountToken, amountAVAX) = removeLiquidity(
            token,
            WAVAX,
            liquidity,
            amountTokenMin,
            amountAVAXMin,
            address(this),
            deadline
        );
        TransferHelper.safeTransfer(token, to, amountToken);
        IWAVAX(WAVAX).withdraw(amountAVAX);
        TransferHelper.safeTransferAVAX(to, amountAVAX);
    }

    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external virtual override returns (uint256 amountA, uint256 amountB) {
        address pair = JoeLibrary.pairFor(factory, tokenA, tokenB);
        uint256 value = approveMax ? uint256(-1) : liquidity;
        IJoePair(pair).permit(
            msg.sender,
            address(this),
            value,
            deadline,
            v,
            r,
            s
        );
        (amountA, amountB) = removeLiquidity(
            tokenA,
            tokenB,
            liquidity,
            amountAMin,
            amountBMin,
            to,
            deadline
        );
    }

    function removeLiquidityAVAXWithPermit(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountAVAXMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    )
        external
        virtual
        override
        returns (uint256 amountToken, uint256 amountAVAX)
    {
        address pair = JoeLibrary.pairFor(factory, token, WAVAX);
        uint256 value = approveMax ? uint256(-1) : liquidity;
        IJoePair(pair).permit(
            msg.sender,
            address(this),
            value,
            deadline,
            v,
            r,
            s
        );
        (amountToken, amountAVAX) = removeLiquidityAVAX(
            token,
            liquidity,
            amountTokenMin,
            amountAVAXMin,
            to,
            deadline
        );
    }

    // **** REMOVE LIQUIDITY (supporting fee-on-transfer tokens) ****
    function removeLiquidityAVAXSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountAVAXMin,
        address to,
        uint256 deadline
    ) public virtual override ensure(deadline) returns (uint256 amountAVAX) {
        (, amountAVAX) = removeLiquidity(
            token,
            WAVAX,
            liquidity,
            amountTokenMin,
            amountAVAXMin,
            address(this),
            deadline
        );
        TransferHelper.safeTransfer(
            token,
            to,
            IERC20Joe(token).balanceOf(address(this))
        );
        IWAVAX(WAVAX).withdraw(amountAVAX);
        TransferHelper.safeTransferAVAX(to, amountAVAX);
    }

    function removeLiquidityAVAXWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountAVAXMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external virtual override returns (uint256 amountAVAX) {
        address pair = JoeLibrary.pairFor(factory, token, WAVAX);
        uint256 value = approveMax ? uint256(-1) : liquidity;
        IJoePair(pair).permit(
            msg.sender,
            address(this),
            value,
            deadline,
            v,
            r,
            s
        );
        amountAVAX = removeLiquidityAVAXSupportingFeeOnTransferTokens(
            token,
            liquidity,
            amountTokenMin,
            amountAVAXMin,
            to,
            deadline
        );
    }

    // **** SWAP ****
    // requires the initial amount to have already been sent to the first pair
    function _swap(
        uint256[] memory amounts,
        address[] memory path,
        address _to
    ) internal virtual {
        for (uint256 i; i < path.length - 1; i++) {
            (address input, address output) = (path[i], path[i + 1]);
            (address token0, ) = JoeLibrary.sortTokens(input, output);
            uint256 amountOut = amounts[i + 1];
            (uint256 amount0Out, uint256 amount1Out) = input == token0
                ? (uint256(0), amountOut)
                : (amountOut, uint256(0));
            address to = i < path.length - 2
                ? JoeLibrary.pairFor(factory, output, path[i + 2])
                : _to;
            IJoePair(JoeLibrary.pairFor(factory, input, output)).swap(
                amount0Out,
                amount1Out,
                to,
                new bytes(0)
            );
        }
    }

    function swapExactTokensForTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    )
        external
        virtual
        override
        ensure(deadline)
        returns (uint256[] memory amounts)
    {
        amounts = JoeLibrary.getAmountsOut(factory, amountIn, path);
        require(
            amounts[amounts.length - 1] >= amountOutMin,
            "JoeRouter: INSUFFICIENT_OUTPUT_AMOUNT"
        );
        TransferHelper.safeTransferFrom(
            path[0],
            msg.sender,
            JoeLibrary.pairFor(factory, path[0], path[1]),
            amounts[0]
        );
        _swap(amounts, path, to);
    }

    function swapTokensForExactTokens(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    )
        external
        virtual
        override
        ensure(deadline)
        returns (uint256[] memory amounts)
    {
        amounts = JoeLibrary.getAmountsIn(factory, amountOut, path);
        require(amounts[0] <= amountInMax, "JoeRouter: EXCESSIVE_INPUT_AMOUNT");
        TransferHelper.safeTransferFrom(
            path[0],
            msg.sender,
            JoeLibrary.pairFor(factory, path[0], path[1]),
            amounts[0]
        );
        _swap(amounts, path, to);
    }

    function swapExactAVAXForTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    )
        external
        payable
        virtual
        override
        ensure(deadline)
        returns (uint256[] memory amounts)
    {
        require(path[0] == WAVAX, "JoeRouter: INVALID_PATH");
        amounts = JoeLibrary.getAmountsOut(factory, msg.value, path);
        require(
            amounts[amounts.length - 1] >= amountOutMin,
            "JoeRouter: INSUFFICIENT_OUTPUT_AMOUNT"
        );
        IWAVAX(WAVAX).deposit{value: amounts[0]}();
        assert(
            IWAVAX(WAVAX).transfer(
                JoeLibrary.pairFor(factory, path[0], path[1]),
                amounts[0]
            )
        );
        _swap(amounts, path, to);
    }

    function swapTokensForExactAVAX(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    )
        external
        virtual
        override
        ensure(deadline)
        returns (uint256[] memory amounts)
    {
        require(path[path.length - 1] == WAVAX, "JoeRouter: INVALID_PATH");
        amounts = JoeLibrary.getAmountsIn(factory, amountOut, path);
        require(amounts[0] <= amountInMax, "JoeRouter: EXCESSIVE_INPUT_AMOUNT");
        TransferHelper.safeTransferFrom(
            path[0],
            msg.sender,
            JoeLibrary.pairFor(factory, path[0], path[1]),
            amounts[0]
        );
        _swap(amounts, path, address(this));
        IWAVAX(WAVAX).withdraw(amounts[amounts.length - 1]);
        TransferHelper.safeTransferAVAX(to, amounts[amounts.length - 1]);
    }

    function swapExactTokensForAVAX(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    )
        external
        virtual
        override
        ensure(deadline)
        returns (uint256[] memory amounts)
    {
        require(path[path.length - 1] == WAVAX, "JoeRouter: INVALID_PATH");
        amounts = JoeLibrary.getAmountsOut(factory, amountIn, path);
        require(
            amounts[amounts.length - 1] >= amountOutMin,
            "JoeRouter: INSUFFICIENT_OUTPUT_AMOUNT"
        );
        TransferHelper.safeTransferFrom(
            path[0],
            msg.sender,
            JoeLibrary.pairFor(factory, path[0], path[1]),
            amounts[0]
        );
        _swap(amounts, path, address(this));
        IWAVAX(WAVAX).withdraw(amounts[amounts.length - 1]);
        TransferHelper.safeTransferAVAX(to, amounts[amounts.length - 1]);
    }

    function swapAVAXForExactTokens(
        uint256 amountOut,
        address[] calldata path,
        address to,
        uint256 deadline
    )
        external
        payable
        virtual
        override
        ensure(deadline)
        returns (uint256[] memory amounts)
    {
        require(path[0] == WAVAX, "JoeRouter: INVALID_PATH");
        amounts = JoeLibrary.getAmountsIn(factory, amountOut, path);
        require(amounts[0] <= msg.value, "JoeRouter: EXCESSIVE_INPUT_AMOUNT");
        IWAVAX(WAVAX).deposit{value: amounts[0]}();
        assert(
            IWAVAX(WAVAX).transfer(
                JoeLibrary.pairFor(factory, path[0], path[1]),
                amounts[0]
            )
        );
        _swap(amounts, path, to);
        // refund dust eth, if any
        if (msg.value > amounts[0])
            TransferHelper.safeTransferAVAX(msg.sender, msg.value - amounts[0]);
    }

    // **** SWAP (supporting fee-on-transfer tokens) ****
    // requires the initial amount to have already been sent to the first pair
    function _swapSupportingFeeOnTransferTokens(
        address[] memory path,
        address _to
    ) internal virtual {
        for (uint256 i; i < path.length - 1; i++) {
            (address input, address output) = (path[i], path[i + 1]);
            (address token0, ) = JoeLibrary.sortTokens(input, output);
            IJoePair pair = IJoePair(
                JoeLibrary.pairFor(factory, input, output)
            );
            uint256 amountInput;
            uint256 amountOutput;
            {
                // scope to avoid stack too deep errors
                (uint256 reserve0, uint256 reserve1, ) = pair.getReserves();
                (uint256 reserveInput, uint256 reserveOutput) = input == token0
                    ? (reserve0, reserve1)
                    : (reserve1, reserve0);
                amountInput = IERC20Joe(input).balanceOf(address(pair)).sub(
                    reserveInput
                );
                amountOutput = JoeLibrary.getAmountOut(
                    amountInput,
                    reserveInput,
                    reserveOutput
                );
            }
            (uint256 amount0Out, uint256 amount1Out) = input == token0
                ? (uint256(0), amountOutput)
                : (amountOutput, uint256(0));
            address to = i < path.length - 2
                ? JoeLibrary.pairFor(factory, output, path[i + 2])
                : _to;
            pair.swap(amount0Out, amount1Out, to, new bytes(0));
        }
    }

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external virtual override ensure(deadline) {
        TransferHelper.safeTransferFrom(
            path[0],
            msg.sender,
            JoeLibrary.pairFor(factory, path[0], path[1]),
            amountIn
        );
        uint256 balanceBefore = IERC20Joe(path[path.length - 1]).balanceOf(to);
        _swapSupportingFeeOnTransferTokens(path, to);
        require(
            IERC20Joe(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >=
                amountOutMin,
            "JoeRouter: INSUFFICIENT_OUTPUT_AMOUNT"
        );
    }

    function swapExactAVAXForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable virtual override ensure(deadline) {
        require(path[0] == WAVAX, "JoeRouter: INVALID_PATH");
        uint256 amountIn = msg.value;
        IWAVAX(WAVAX).deposit{value: amountIn}();
        assert(
            IWAVAX(WAVAX).transfer(
                JoeLibrary.pairFor(factory, path[0], path[1]),
                amountIn
            )
        );
        uint256 balanceBefore = IERC20Joe(path[path.length - 1]).balanceOf(to);
        _swapSupportingFeeOnTransferTokens(path, to);
        require(
            IERC20Joe(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >=
                amountOutMin,
            "JoeRouter: INSUFFICIENT_OUTPUT_AMOUNT"
        );
    }

    function swapExactTokensForAVAXSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external virtual override ensure(deadline) {
        require(path[path.length - 1] == WAVAX, "JoeRouter: INVALID_PATH");
        TransferHelper.safeTransferFrom(
            path[0],
            msg.sender,
            JoeLibrary.pairFor(factory, path[0], path[1]),
            amountIn
        );
        _swapSupportingFeeOnTransferTokens(path, address(this));
        uint256 amountOut = IERC20Joe(WAVAX).balanceOf(address(this));
        require(
            amountOut >= amountOutMin,
            "JoeRouter: INSUFFICIENT_OUTPUT_AMOUNT"
        );
        IWAVAX(WAVAX).withdraw(amountOut);
        TransferHelper.safeTransferAVAX(to, amountOut);
    }

    // **** LIBRARY FUNCTIONS ****
    function quote(
        uint256 amountA,
        uint256 reserveA,
        uint256 reserveB
    ) public pure virtual override returns (uint256 amountB) {
        return JoeLibrary.quote(amountA, reserveA, reserveB);
    }

    function getAmountOut(
        uint256 amountIn,
        uint256 reserveIn,
        uint256 reserveOut
    ) public pure virtual override returns (uint256 amountOut) {
        return JoeLibrary.getAmountOut(amountIn, reserveIn, reserveOut);
    }

    function getAmountIn(
        uint256 amountOut,
        uint256 reserveIn,
        uint256 reserveOut
    ) public pure virtual override returns (uint256 amountIn) {
        return JoeLibrary.getAmountIn(amountOut, reserveIn, reserveOut);
    }

    function getAmountsOut(uint256 amountIn, address[] memory path)
        public
        view
        virtual
        override
        returns (uint256[] memory amounts)
    {
        return JoeLibrary.getAmountsOut(factory, amountIn, path);
    }

    function getAmountsIn(uint256 amountOut, address[] memory path)
        public
        view
        virtual
        override
        returns (uint256[] memory amounts)
    {
        return JoeLibrary.getAmountsIn(factory, amountOut, path);
    }
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.5.0;

import "../interfaces/IJoePair.sol";

import "./SafeMath.sol";

library JoeLibrary {
    using SafeMathJoe for uint256;

    // returns sorted token addresses, used to handle return values from pairs sorted in this order
    function sortTokens(address tokenA, address tokenB)
        internal
        pure
        returns (address token0, address token1)
    {
        require(tokenA != tokenB, "JoeLibrary: IDENTICAL_ADDRESSES");
        (token0, token1) = tokenA < tokenB
            ? (tokenA, tokenB)
            : (tokenB, tokenA);
        require(token0 != address(0), "JoeLibrary: ZERO_ADDRESS");
    }

    // calculates the CREATE2 address for a pair without making any external calls
    function pairFor(
        address factory,
        address tokenA,
        address tokenB
    ) internal pure returns (address pair) {
        (address token0, address token1) = sortTokens(tokenA, tokenB);
        pair = address(
            uint256(
                keccak256(
                    abi.encodePacked(
                        hex"ff",
                        factory,
                        keccak256(abi.encodePacked(token0, token1)),
                        hex"0bbca9af0511ad1a1da383135cf3a8d2ac620e549ef9f6ae3a4c33c2fed0af91" // init code fuji
                    )
                )
            )
        );
    }

    // fetches and sorts the reserves for a pair
    function getReserves(
        address factory,
        address tokenA,
        address tokenB
    ) internal view returns (uint256 reserveA, uint256 reserveB) {
        (address token0, ) = sortTokens(tokenA, tokenB);
        (uint256 reserve0, uint256 reserve1, ) = IJoePair(
            pairFor(factory, tokenA, tokenB)
        ).getReserves();
        (reserveA, reserveB) = tokenA == token0
            ? (reserve0, reserve1)
            : (reserve1, reserve0);
    }

    // given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
    function quote(
        uint256 amountA,
        uint256 reserveA,
        uint256 reserveB
    ) internal pure returns (uint256 amountB) {
        require(amountA > 0, "JoeLibrary: INSUFFICIENT_AMOUNT");
        require(
            reserveA > 0 && reserveB > 0,
            "JoeLibrary: INSUFFICIENT_LIQUIDITY"
        );
        amountB = amountA.mul(reserveB) / reserveA;
    }

    // given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
    function getAmountOut(
        uint256 amountIn,
        uint256 reserveIn,
        uint256 reserveOut
    ) internal pure returns (uint256 amountOut) {
        require(amountIn > 0, "JoeLibrary: INSUFFICIENT_INPUT_AMOUNT");
        require(
            reserveIn > 0 && reserveOut > 0,
            "JoeLibrary: INSUFFICIENT_LIQUIDITY"
        );
        uint256 amountInWithFee = amountIn.mul(997);
        uint256 numerator = amountInWithFee.mul(reserveOut);
        uint256 denominator = reserveIn.mul(1000).add(amountInWithFee);
        amountOut = numerator / denominator;
    }

    // given an output amount of an asset and pair reserves, returns a required input amount of the other asset
    function getAmountIn(
        uint256 amountOut,
        uint256 reserveIn,
        uint256 reserveOut
    ) internal pure returns (uint256 amountIn) {
        require(amountOut > 0, "JoeLibrary: INSUFFICIENT_OUTPUT_AMOUNT");
        require(
            reserveIn > 0 && reserveOut > 0,
            "JoeLibrary: INSUFFICIENT_LIQUIDITY"
        );
        uint256 numerator = reserveIn.mul(amountOut).mul(1000);
        uint256 denominator = reserveOut.sub(amountOut).mul(997);
        amountIn = (numerator / denominator).add(1);
    }

    // performs chained getAmountOut calculations on any number of pairs
    function getAmountsOut(
        address factory,
        uint256 amountIn,
        address[] memory path
    ) internal view returns (uint256[] memory amounts) {
        require(path.length >= 2, "JoeLibrary: INVALID_PATH");
        amounts = new uint256[](path.length);
        amounts[0] = amountIn;
        for (uint256 i; i < path.length - 1; i++) {
            (uint256 reserveIn, uint256 reserveOut) = getReserves(
                factory,
                path[i],
                path[i + 1]
            );
            amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
        }
    }

    // performs chained getAmountIn calculations on any number of pairs
    function getAmountsIn(
        address factory,
        uint256 amountOut,
        address[] memory path
    ) internal view returns (uint256[] memory amounts) {
        require(path.length >= 2, "JoeLibrary: INVALID_PATH");
        amounts = new uint256[](path.length);
        amounts[amounts.length - 1] = amountOut;
        for (uint256 i = path.length - 1; i > 0; i--) {
            (uint256 reserveIn, uint256 reserveOut) = getReserves(
                factory,
                path[i - 1],
                path[i]
            );
            amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
        }
    }
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity =0.6.12;

// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)

library SafeMathJoe {
    function add(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require((z = x + y) >= x, "ds-math-add-overflow");
    }

    function sub(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require((z = x - y) <= x, "ds-math-sub-underflow");
    }

    function mul(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require(y == 0 || (z = x * y) / y == x, "ds-math-mul-overflow");
    }
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.6.0;

// helper methods for interacting with ERC20 tokens and sending AVAX that do not consistently return true/false
library TransferHelper {
    function safeApprove(
        address token,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('approve(address,uint256)')));
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(0x095ea7b3, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "TransferHelper: APPROVE_FAILED"
        );
    }

    function safeTransfer(
        address token,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('transfer(address,uint256)')));
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(0xa9059cbb, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "TransferHelper: TRANSFER_FAILED"
        );
    }

    function safeTransferFrom(
        address token,
        address from,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(0x23b872dd, from, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "TransferHelper: TRANSFER_FROM_FAILED"
        );
    }

    function safeTransferAVAX(address to, uint256 value) internal {
        (bool success, ) = to.call{value: value}(new bytes(0));
        require(success, "TransferHelper: AVAX_TRANSFER_FAILED");
    }
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.5.0;

interface IJoeFactory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    function feeTo() external view returns (address);

    function feeToSetter() external view returns (address);

    function migrator() external view returns (address);

    function getPair(address tokenA, address tokenB)
        external
        view
        returns (address pair);

    function allPairs(uint256) external view returns (address pair);

    function allPairsLength() external view returns (uint256);

    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;

    function setMigrator(address) external;
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.5.0;

interface IERC20Joe {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);

    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint8);

    function totalSupply() external view returns (uint256);

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

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

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

    function transfer(address to, uint256 value) external returns (bool);

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

// SPDX-License-Identifier: GPL-3.0

pragma solidity =0.6.12;

import "./JoeERC20.sol";
import "./libraries/Math.sol";
import "./libraries/UQ112x112.sol";
import "./interfaces/IERC20.sol";
import "./interfaces/IJoeFactory.sol";
import "./interfaces/IJoeCallee.sol";

interface IMigrator {
    // Return the desired amount of liquidity token that the migrator wants.
    function desiredLiquidity() external view returns (uint256);
}

contract JoePair is JoeERC20 {
    using SafeMathJoe for uint256;
    using UQ112x112 for uint224;

    uint256 public constant MINIMUM_LIQUIDITY = 10**3;
    bytes4 private constant SELECTOR =
        bytes4(keccak256(bytes("transfer(address,uint256)")));

    address public factory;
    address public token0;
    address public token1;

    uint112 private reserve0; // uses single storage slot, accessible via getReserves
    uint112 private reserve1; // uses single storage slot, accessible via getReserves
    uint32 private blockTimestampLast; // uses single storage slot, accessible via getReserves

    uint256 public price0CumulativeLast;
    uint256 public price1CumulativeLast;
    uint256 public kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event

    uint256 private unlocked = 1;
    modifier lock() {
        require(unlocked == 1, "Joe: LOCKED");
        unlocked = 0;
        _;
        unlocked = 1;
    }

    function getReserves()
        public
        view
        returns (
            uint112 _reserve0,
            uint112 _reserve1,
            uint32 _blockTimestampLast
        )
    {
        _reserve0 = reserve0;
        _reserve1 = reserve1;
        _blockTimestampLast = blockTimestampLast;
    }

    function _safeTransfer(
        address token,
        address to,
        uint256 value
    ) private {
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(SELECTOR, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "Joe: TRANSFER_FAILED"
        );
    }

    event Mint(address indexed sender, uint256 amount0, uint256 amount1);
    event Burn(
        address indexed sender,
        uint256 amount0,
        uint256 amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint256 amount0In,
        uint256 amount1In,
        uint256 amount0Out,
        uint256 amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    constructor() public {
        factory = msg.sender;
    }

    // called once by the factory at time of deployment
    function initialize(address _token0, address _token1) external {
        require(msg.sender == factory, "Joe: FORBIDDEN"); // sufficient check
        token0 = _token0;
        token1 = _token1;
    }

    // update reserves and, on the first call per block, price accumulators
    function _update(
        uint256 balance0,
        uint256 balance1,
        uint112 _reserve0,
        uint112 _reserve1
    ) private {
        require(
            balance0 <= uint112(-1) && balance1 <= uint112(-1),
            "Joe: OVERFLOW"
        );
        uint32 blockTimestamp = uint32(block.timestamp % 2**32);
        uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
        if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
            // * never overflows, and + overflow is desired
            price0CumulativeLast +=
                uint256(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) *
                timeElapsed;
            price1CumulativeLast +=
                uint256(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) *
                timeElapsed;
        }
        reserve0 = uint112(balance0);
        reserve1 = uint112(balance1);
        blockTimestampLast = blockTimestamp;
        emit Sync(reserve0, reserve1);
    }

    // if fee is on, mint liquidity equivalent to 1/6th of the growth in sqrt(k)
    function _mintFee(uint112 _reserve0, uint112 _reserve1)
        private
        returns (bool feeOn)
    {
        address feeTo = IJoeFactory(factory).feeTo();
        feeOn = feeTo != address(0);
        uint256 _kLast = kLast; // gas savings
        if (feeOn) {
            if (_kLast != 0) {
                uint256 rootK = Math.sqrt(uint256(_reserve0).mul(_reserve1));
                uint256 rootKLast = Math.sqrt(_kLast);
                if (rootK > rootKLast) {
                    uint256 numerator = totalSupply.mul(rootK.sub(rootKLast));
                    uint256 denominator = rootK.mul(5).add(rootKLast);
                    uint256 liquidity = numerator / denominator;
                    if (liquidity > 0) _mint(feeTo, liquidity);
                }
            }
        } else if (_kLast != 0) {
            kLast = 0;
        }
    }

    // this low-level function should be called from a contract which performs important safety checks
    function mint(address to) external lock returns (uint256 liquidity) {
        (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
        uint256 balance0 = IERC20Joe(token0).balanceOf(address(this));
        uint256 balance1 = IERC20Joe(token1).balanceOf(address(this));
        uint256 amount0 = balance0.sub(_reserve0);
        uint256 amount1 = balance1.sub(_reserve1);

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint256 _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        if (_totalSupply == 0) {
            address migrator = IJoeFactory(factory).migrator();
            if (msg.sender == migrator) {
                liquidity = IMigrator(migrator).desiredLiquidity();
                require(
                    liquidity > 0 && liquidity != uint256(-1),
                    "Bad desired liquidity"
                );
            } else {
                require(migrator == address(0), "Must not have migrator");
                liquidity = Math.sqrt(amount0.mul(amount1)).sub(
                    MINIMUM_LIQUIDITY
                );
                _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
            }
        } else {
            liquidity = Math.min(
                amount0.mul(_totalSupply) / _reserve0,
                amount1.mul(_totalSupply) / _reserve1
            );
        }
        require(liquidity > 0, "Joe: INSUFFICIENT_LIQUIDITY_MINTED");
        _mint(to, liquidity);

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint256(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Mint(msg.sender, amount0, amount1);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function burn(address to)
        external
        lock
        returns (uint256 amount0, uint256 amount1)
    {
        (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
        address _token0 = token0; // gas savings
        address _token1 = token1; // gas savings
        uint256 balance0 = IERC20Joe(_token0).balanceOf(address(this));
        uint256 balance1 = IERC20Joe(_token1).balanceOf(address(this));
        uint256 liquidity = balanceOf[address(this)];

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint256 _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution
        amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution
        require(
            amount0 > 0 && amount1 > 0,
            "Joe: INSUFFICIENT_LIQUIDITY_BURNED"
        );
        _burn(address(this), liquidity);
        _safeTransfer(_token0, to, amount0);
        _safeTransfer(_token1, to, amount1);
        balance0 = IERC20Joe(_token0).balanceOf(address(this));
        balance1 = IERC20Joe(_token1).balanceOf(address(this));

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint256(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Burn(msg.sender, amount0, amount1, to);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function swap(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external lock {
        require(
            amount0Out > 0 || amount1Out > 0,
            "Joe: INSUFFICIENT_OUTPUT_AMOUNT"
        );
        (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
        require(
            amount0Out < _reserve0 && amount1Out < _reserve1,
            "Joe: INSUFFICIENT_LIQUIDITY"
        );

        uint256 balance0;
        uint256 balance1;
        {
            // scope for _token{0,1}, avoids stack too deep errors
            address _token0 = token0;
            address _token1 = token1;
            require(to != _token0 && to != _token1, "Joe: INVALID_TO");
            if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out); // optimistically transfer tokens
            if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out); // optimistically transfer tokens
            if (data.length > 0)
                IJoeCallee(to).joeCall(
                    msg.sender,
                    amount0Out,
                    amount1Out,
                    data
                );
            balance0 = IERC20Joe(_token0).balanceOf(address(this));
            balance1 = IERC20Joe(_token1).balanceOf(address(this));
        }
        uint256 amount0In = balance0 > _reserve0 - amount0Out
            ? balance0 - (_reserve0 - amount0Out)
            : 0;
        uint256 amount1In = balance1 > _reserve1 - amount1Out
            ? balance1 - (_reserve1 - amount1Out)
            : 0;
        require(
            amount0In > 0 || amount1In > 0,
            "Joe: INSUFFICIENT_INPUT_AMOUNT"
        );
        {
            // scope for reserve{0,1}Adjusted, avoids stack too deep errors
            uint256 balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(3));
            uint256 balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(3));
            require(
                balance0Adjusted.mul(balance1Adjusted) >=
                    uint256(_reserve0).mul(_reserve1).mul(1000**2),
                "Joe: K"
            );
        }

        _update(balance0, balance1, _reserve0, _reserve1);
        emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);
    }

    // force balances to match reserves
    function skim(address to) external lock {
        address _token0 = token0; // gas savings
        address _token1 = token1; // gas savings
        _safeTransfer(
            _token0,
            to,
            IERC20Joe(_token0).balanceOf(address(this)).sub(reserve0)
        );
        _safeTransfer(
            _token1,
            to,
            IERC20Joe(_token1).balanceOf(address(this)).sub(reserve1)
        );
    }

    // force reserves to match balances
    function sync() external lock {
        _update(
            IERC20Joe(token0).balanceOf(address(this)),
            IERC20Joe(token1).balanceOf(address(this)),
            reserve0,
            reserve1
        );
    }
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity =0.6.12;

import "./libraries/SafeMath.sol";

contract JoeERC20 {
    using SafeMathJoe for uint256;

    string public constant name = "Joe LP Token";
    string public constant symbol = "JLP";
    uint8 public constant decimals = 18;
    uint256 public totalSupply;
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    bytes32 public DOMAIN_SEPARATOR;
    // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public constant PERMIT_TYPEHASH =
        0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
    mapping(address => uint256) public nonces;

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

    constructor() public {
        uint256 chainId;
        assembly {
            chainId := chainid()
        }
        DOMAIN_SEPARATOR = keccak256(
            abi.encode(
                keccak256(
                    "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
                ),
                keccak256(bytes(name)),
                keccak256(bytes("1")),
                chainId,
                address(this)
            )
        );
    }

    function _mint(address to, uint256 value) internal {
        totalSupply = totalSupply.add(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(address(0), to, value);
    }

    function _burn(address from, uint256 value) internal {
        balanceOf[from] = balanceOf[from].sub(value);
        totalSupply = totalSupply.sub(value);
        emit Transfer(from, address(0), value);
    }

    function _approve(
        address owner,
        address spender,
        uint256 value
    ) private {
        allowance[owner][spender] = value;
        emit Approval(owner, spender, value);
    }

    function _transfer(
        address from,
        address to,
        uint256 value
    ) private {
        balanceOf[from] = balanceOf[from].sub(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(from, to, value);
    }

    function approve(address spender, uint256 value) external returns (bool) {
        _approve(msg.sender, spender, value);
        return true;
    }

    function transfer(address to, uint256 value) external returns (bool) {
        _transfer(msg.sender, to, value);
        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool) {
        if (allowance[from][msg.sender] != uint256(-1)) {
            allowance[from][msg.sender] = allowance[from][msg.sender].sub(
                value
            );
        }
        _transfer(from, to, value);
        return true;
    }

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external {
        require(deadline >= block.timestamp, "Joe: EXPIRED");
        bytes32 digest = keccak256(
            abi.encodePacked(
                "\x19\x01",
                DOMAIN_SEPARATOR,
                keccak256(
                    abi.encode(
                        PERMIT_TYPEHASH,
                        owner,
                        spender,
                        value,
                        nonces[owner]++,
                        deadline
                    )
                )
            )
        );
        address recoveredAddress = ecrecover(digest, v, r, s);
        require(
            recoveredAddress != address(0) && recoveredAddress == owner,
            "Joe: INVALID_SIGNATURE"
        );
        _approve(owner, spender, value);
    }
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity =0.6.12;

// a library for performing various math operations

library Math {
    function min(uint256 x, uint256 y) internal pure returns (uint256 z) {
        z = x < y ? x : y;
    }

    // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
    function sqrt(uint256 y) internal pure returns (uint256 z) {
        if (y > 3) {
            z = y;
            uint256 x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity =0.6.12;

// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))

// range: [0, 2**112 - 1]
// resolution: 1 / 2**112

library UQ112x112 {
    uint224 constant Q112 = 2**112;

    // encode a uint112 as a UQ112x112
    function encode(uint112 y) internal pure returns (uint224 z) {
        z = uint224(y) * Q112; // never overflows
    }

    // divide a UQ112x112 by a uint112, returning a UQ112x112
    function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
        z = x / uint224(y);
    }
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.5.0;

interface IJoeCallee {
    function joeCall(
        address sender,
        uint256 amount0,
        uint256 amount1,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity =0.6.12;

import "./interfaces/IJoeFactory.sol";
import "./JoePair.sol";

contract JoeFactory is IJoeFactory {
    address public override feeTo;
    address public override feeToSetter;
    address public override migrator;

    mapping(address => mapping(address => address)) public override getPair;
    address[] public override allPairs;

    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    constructor(address _feeToSetter) public {
        feeToSetter = _feeToSetter;
    }

    function allPairsLength() external view override returns (uint256) {
        return allPairs.length;
    }

    function pairCodeHash() external pure returns (bytes32) {
        return keccak256(type(JoePair).creationCode);
    }

    function createPair(address tokenA, address tokenB)
        external
        override
        returns (address pair)
    {
        require(tokenA != tokenB, "Joe: IDENTICAL_ADDRESSES");
        (address token0, address token1) = tokenA < tokenB
            ? (tokenA, tokenB)
            : (tokenB, tokenA);
        require(token0 != address(0), "Joe: ZERO_ADDRESS");
        require(getPair[token0][token1] == address(0), "Joe: PAIR_EXISTS"); // single check is sufficient
        bytes memory bytecode = type(JoePair).creationCode;
        bytes32 salt = keccak256(abi.encodePacked(token0, token1));
        assembly {
            pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
        }
        JoePair(pair).initialize(token0, token1);
        getPair[token0][token1] = pair;
        getPair[token1][token0] = pair; // populate mapping in the reverse direction
        allPairs.push(pair);
        emit PairCreated(token0, token1, pair, allPairs.length);
    }

    function setFeeTo(address _feeTo) external override {
        require(msg.sender == feeToSetter, "Joe: FORBIDDEN");
        feeTo = _feeTo;
    }

    function setMigrator(address _migrator) external override {
        require(msg.sender == feeToSetter, "Joe: FORBIDDEN");
        migrator = _migrator;
    }

    function setFeeToSetter(address _feeToSetter) external override {
        require(msg.sender == feeToSetter, "Joe: FORBIDDEN");
        feeToSetter = _feeToSetter;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./traderjoe/interfaces/IJoePair.sol";
import "./traderjoe/interfaces/IJoeRouter01.sol";
import "./traderjoe/interfaces/IJoeFactory.sol";
import "./traderjoe/libraries/JoeLibrary.sol";

// JoeRoll helps your migrate your existing Uniswap LP tokens to TraderJoe LP ones
contract JoeRoll is Ownable {
    using SafeERC20 for IERC20;

    IJoeRouter01 public oldRouter;
    IJoeRouter01 public router;
    IERC20 public hatToken = IERC20(0x82FE038Ea4b50f9C957da326C412ebd73462077C);

    constructor(IJoeRouter01 _oldRouter, IJoeRouter01 _router) public {
        oldRouter = _oldRouter;
        router = _router;
    }

    function migrateWithPermit(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public {
        IJoePair pair = IJoePair(pairForOldRouter(tokenA, tokenB));
        pair.permit(msg.sender, address(this), liquidity, deadline, v, r, s);

        migrate(tokenA, tokenB, liquidity, amountAMin, amountBMin, deadline);
    }

    // msg.sender should have approved 'liquidity' amount of LP token of 'tokenA' and 'tokenB'
    function migrate(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        uint256 deadline
    ) public {
        require(deadline >= block.timestamp, "JoeSwap: EXPIRED");

        // Remove liquidity from the old router with permit
        (uint256 amountA, uint256 amountB) = removeLiquidity(
            tokenA,
            tokenB,
            liquidity,
            amountAMin,
            amountBMin,
            deadline
        );

        // Add liquidity to the new router
        (uint256 pooledAmountA, uint256 pooledAmountB) = addLiquidity(
            tokenA,
            tokenB,
            amountA,
            amountB
        );

        // Send remaining tokens to msg.sender
        if (amountA > pooledAmountA) {
            IERC20(tokenA).safeTransfer(msg.sender, amountA - pooledAmountA);
        }
        if (amountB > pooledAmountB) {
            IERC20(tokenB).safeTransfer(msg.sender, amountB - pooledAmountB);
        }

        // Transfer user a single hat token if there are any remaining and user has not received one yet
        if (address(hatToken) != address(0)) {
            uint256 hatSupply = hatToken.balanceOf(address(this));
            uint256 userSupply = hatToken.balanceOf(msg.sender);
            if (hatSupply > 0 && userSupply == 0) {
                hatToken.safeTransfer(msg.sender, 1e18);
            }
        }
    }

    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        uint256 deadline
    ) internal returns (uint256 amountA, uint256 amountB) {
        IJoePair pair = IJoePair(pairForOldRouter(tokenA, tokenB));
        pair.transferFrom(msg.sender, address(pair), liquidity);
        (uint256 amount0, uint256 amount1) = pair.burn(address(this));
        (address token0, ) = JoeLibrary.sortTokens(tokenA, tokenB);
        (amountA, amountB) = tokenA == token0
            ? (amount0, amount1)
            : (amount1, amount0);
        require(amountA >= amountAMin, "JoeRoll: INSUFFICIENT_A_AMOUNT");
        require(amountB >= amountBMin, "JoeRoll: INSUFFICIENT_B_AMOUNT");
    }

    // calculates the CREATE2 address for a pair without making any external calls
    function pairForOldRouter(address tokenA, address tokenB)
        internal
        view
        returns (address pair)
    {
        (address token0, address token1) = JoeLibrary.sortTokens(
            tokenA,
            tokenB
        );
        pair = address(
            uint256(
                keccak256(
                    abi.encodePacked(
                        hex"ff",
                        oldRouter.factory(),
                        keccak256(abi.encodePacked(token0, token1)),
                        hex"40231f6b438bce0797c9ada29b718a87ea0a5cea3fe9a771abdd76bd41a3e545" // init code hash
                    )
                )
            )
        );
    }

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired
    ) internal returns (uint256 amountA, uint256 amountB) {
        (amountA, amountB) = _addLiquidity(
            tokenA,
            tokenB,
            amountADesired,
            amountBDesired
        );
        address pair = JoeLibrary.pairFor(router.factory(), tokenA, tokenB);
        IERC20(tokenA).safeTransfer(pair, amountA);
        IERC20(tokenB).safeTransfer(pair, amountB);
        IJoePair(pair).mint(msg.sender);
    }

    function _addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired
    ) internal returns (uint256 amountA, uint256 amountB) {
        // create the pair if it doesn't exist yet
        IJoeFactory factory = IJoeFactory(router.factory());
        if (factory.getPair(tokenA, tokenB) == address(0)) {
            factory.createPair(tokenA, tokenB);
        }
        (uint256 reserveA, uint256 reserveB) = JoeLibrary.getReserves(
            address(factory),
            tokenA,
            tokenB
        );
        if (reserveA == 0 && reserveB == 0) {
            (amountA, amountB) = (amountADesired, amountBDesired);
        } else {
            uint256 amountBOptimal = JoeLibrary.quote(
                amountADesired,
                reserveA,
                reserveB
            );
            if (amountBOptimal <= amountBDesired) {
                (amountA, amountB) = (amountADesired, amountBOptimal);
            } else {
                uint256 amountAOptimal = JoeLibrary.quote(
                    amountBDesired,
                    reserveB,
                    reserveA
                );
                assert(amountAOptimal <= amountADesired);
                (amountA, amountB) = (amountAOptimal, amountBDesired);
            }
        }
    }
}

// SPDX-License-Identifier: MIT

// P1 - P3: OK
pragma solidity 0.6.12;
import "./libraries/SafeMath.sol";
import "./libraries/SafeERC20.sol";

import "./traderjoe/interfaces/IJoeERC20.sol";
import "./traderjoe/interfaces/IJoePair.sol";
import "./traderjoe/interfaces/IJoeFactory.sol";

import "./boringcrypto/BoringOwnable.sol";

// JoeMaker is MasterJoe's left hand and kinda a wizard. He can cook up Joe from pretty much anything!
// This contract handles "serving up" rewards for xJoe holders by trading tokens collected from fees for Joe.

// T1 - T4: OK
contract JoeMaker is BoringOwnable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    // V1 - V5: OK
    IJoeFactory public immutable factory;
    //0xC0AEe478e3658e2610c5F7A4A2E1777cE9e4f2Ac
    // V1 - V5: OK
    address public immutable bar;
    //0x8798249c2E607446EfB7Ad49eC89dD1865Ff4272
    // V1 - V5: OK
    address private immutable joe;
    //0x6B3595068778DD592e39A122f4f5a5cF09C90fE2
    // V1 - V5: OK
    address private immutable wavax;
    //0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2

    // V1 - V5: OK
    mapping(address => address) internal _bridges;

    // E1: OK
    event LogBridgeSet(address indexed token, address indexed bridge);
    // E1: OK
    event LogConvert(
        address indexed server,
        address indexed token0,
        address indexed token1,
        uint256 amount0,
        uint256 amount1,
        uint256 amountJOE
    );

    constructor(
        address _factory,
        address _bar,
        address _joe,
        address _wavax
    ) public {
        factory = IJoeFactory(_factory);
        bar = _bar;
        joe = _joe;
        wavax = _wavax;
    }

    // F1 - F10: OK
    // C1 - C24: OK
    function bridgeFor(address token) public view returns (address bridge) {
        bridge = _bridges[token];
        if (bridge == address(0)) {
            bridge = wavax;
        }
    }

    // F1 - F10: OK
    // C1 - C24: OK
    function setBridge(address token, address bridge) external onlyOwner {
        // Checks
        require(
            token != joe && token != wavax && token != bridge,
            "JoeMaker: Invalid bridge"
        );

        // Effects
        _bridges[token] = bridge;
        emit LogBridgeSet(token, bridge);
    }

    // M1 - M5: OK
    // C1 - C24: OK
    // C6: It's not a fool proof solution, but it prevents flash loans, so here it's ok to use tx.origin
    modifier onlyEOA() {
        // Try to make flash-loan exploit harder to do by only allowing externally owned addresses.
        require(msg.sender == tx.origin, "JoeMaker: must use EOA");
        _;
    }

    // F1 - F10: OK
    // F3: _convert is separate to save gas by only checking the 'onlyEOA' modifier once in case of convertMultiple
    // F6: There is an exploit to add lots of JOE to the bar, run convert, then remove the JOE again.
    //     As the size of the JoeBar has grown, this requires large amounts of funds and isn't super profitable anymore
    //     The onlyEOA modifier prevents this being done with a flash loan.
    // C1 - C24: OK
    function convert(address token0, address token1) external onlyEOA() {
        _convert(token0, token1);
    }

    // F1 - F10: OK, see convert
    // C1 - C24: OK
    // C3: Loop is under control of the caller
    function convertMultiple(
        address[] calldata token0,
        address[] calldata token1
    ) external onlyEOA() {
        // TODO: This can be optimized a fair bit, but this is safer and simpler for now
        uint256 len = token0.length;
        for (uint256 i = 0; i < len; i++) {
            _convert(token0[i], token1[i]);
        }
    }

    // F1 - F10: OK
    // C1- C24: OK
    function _convert(address token0, address token1) internal {
        // Interactions
        // S1 - S4: OK
        IJoePair pair = IJoePair(factory.getPair(token0, token1));
        require(address(pair) != address(0), "JoeMaker: Invalid pair");
        // balanceOf: S1 - S4: OK
        // transfer: X1 - X5: OK
        IERC20(address(pair)).safeTransfer(
            address(pair),
            pair.balanceOf(address(this))
        );
        // X1 - X5: OK
        (uint256 amount0, uint256 amount1) = pair.burn(address(this));
        if (token0 != pair.token0()) {
            (amount0, amount1) = (amount1, amount0);
        }
        emit LogConvert(
            msg.sender,
            token0,
            token1,
            amount0,
            amount1,
            _convertStep(token0, token1, amount0, amount1)
        );
    }

    // F1 - F10: OK
    // C1 - C24: OK
    // All safeTransfer, _swap, _toJOE, _convertStep: X1 - X5: OK
    function _convertStep(
        address token0,
        address token1,
        uint256 amount0,
        uint256 amount1
    ) internal returns (uint256 joeOut) {
        // Interactions
        if (token0 == token1) {
            uint256 amount = amount0.add(amount1);
            if (token0 == joe) {
                IERC20(joe).safeTransfer(bar, amount);
                joeOut = amount;
            } else if (token0 == wavax) {
                joeOut = _toJOE(wavax, amount);
            } else {
                address bridge = bridgeFor(token0);
                amount = _swap(token0, bridge, amount, address(this));
                joeOut = _convertStep(bridge, bridge, amount, 0);
            }
        } else if (token0 == joe) {
            // eg. JOE - AVAX
            IERC20(joe).safeTransfer(bar, amount0);
            joeOut = _toJOE(token1, amount1).add(amount0);
        } else if (token1 == joe) {
            // eg. USDT - JOE
            IERC20(joe).safeTransfer(bar, amount1);
            joeOut = _toJOE(token0, amount0).add(amount1);
        } else if (token0 == wavax) {
            // eg. AVAX - USDC
            joeOut = _toJOE(
                wavax,
                _swap(token1, wavax, amount1, address(this)).add(amount0)
            );
        } else if (token1 == wavax) {
            // eg. USDT - AVAX
            joeOut = _toJOE(
                wavax,
                _swap(token0, wavax, amount0, address(this)).add(amount1)
            );
        } else {
            // eg. MIC - USDT
            address bridge0 = bridgeFor(token0);
            address bridge1 = bridgeFor(token1);
            if (bridge0 == token1) {
                // eg. MIC - USDT - and bridgeFor(MIC) = USDT
                joeOut = _convertStep(
                    bridge0,
                    token1,
                    _swap(token0, bridge0, amount0, address(this)),
                    amount1
                );
            } else if (bridge1 == token0) {
                // eg. WBTC - DSD - and bridgeFor(DSD) = WBTC
                joeOut = _convertStep(
                    token0,
                    bridge1,
                    amount0,
                    _swap(token1, bridge1, amount1, address(this))
                );
            } else {
                joeOut = _convertStep(
                    bridge0,
                    bridge1, // eg. USDT - DSD - and bridgeFor(DSD) = WBTC
                    _swap(token0, bridge0, amount0, address(this)),
                    _swap(token1, bridge1, amount1, address(this))
                );
            }
        }
    }

    // F1 - F10: OK
    // C1 - C24: OK
    // All safeTransfer, swap: X1 - X5: OK
    function _swap(
        address fromToken,
        address toToken,
        uint256 amountIn,
        address to
    ) internal returns (uint256 amountOut) {
        // Checks
        // X1 - X5: OK
        IJoePair pair = IJoePair(factory.getPair(fromToken, toToken));
        require(address(pair) != address(0), "JoeMaker: Cannot convert");

        // Interactions
        // X1 - X5: OK
        (uint256 reserve0, uint256 reserve1, ) = pair.getReserves();
        uint256 amountInWithFee = amountIn.mul(997);
        if (fromToken == pair.token0()) {
            amountOut =
                amountIn.mul(997).mul(reserve1) /
                reserve0.mul(1000).add(amountInWithFee);
            IERC20(fromToken).safeTransfer(address(pair), amountIn);
            pair.swap(0, amountOut, to, new bytes(0));
            // TODO: Add maximum slippage?
        } else {
            amountOut =
                amountIn.mul(997).mul(reserve0) /
                reserve1.mul(1000).add(amountInWithFee);
            IERC20(fromToken).safeTransfer(address(pair), amountIn);
            pair.swap(amountOut, 0, to, new bytes(0));
            // TODO: Add maximum slippage?
        }
    }

    // F1 - F10: OK
    // C1 - C24: OK
    function _toJOE(address token, uint256 amountIn)
        internal
        returns (uint256 amountOut)
    {
        // X1 - X5: OK
        amountOut = _swap(token, joe, amountIn, bar);
    }
}

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

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

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

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

    function div(uint256 a, uint256 b) internal pure returns (uint256 c) {
        require(b > 0, "SafeMath: Div by Zero");
        c = a / b;
    }

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

library SafeMath128 {
    function add(uint128 a, uint128 b) internal pure returns (uint128 c) {
        require((c = a + b) >= b, "SafeMath: Add Overflow");
    }

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

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

import "../interfaces/IERC20.sol";

library SafeERC20 {
    function safeSymbol(IERC20 token) internal view returns (string memory) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeWithSelector(0x95d89b41)
        );
        return success && data.length > 0 ? abi.decode(data, (string)) : "???";
    }

    function safeName(IERC20 token) internal view returns (string memory) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeWithSelector(0x06fdde03)
        );
        return success && data.length > 0 ? abi.decode(data, (string)) : "???";
    }

    function safeDecimals(IERC20 token) public view returns (uint8) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeWithSelector(0x313ce567)
        );
        return success && data.length == 32 ? abi.decode(data, (uint8)) : 18;
    }

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 amount
    ) internal {
        (bool success, bytes memory data) = address(token).call(
            abi.encodeWithSelector(0xa9059cbb, to, amount)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "SafeERC20: Transfer failed"
        );
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        uint256 amount
    ) internal {
        (bool success, bytes memory data) = address(token).call(
            abi.encodeWithSelector(0x23b872dd, from, address(this), amount)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "SafeERC20: TransferFrom failed"
        );
    }
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.5.0;

interface IJoeERC20 {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);

    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint256);

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

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

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

    function transfer(address to, uint256 value) external returns (bool);

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

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint256);

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;
}

// SPDX-License-Identifier: MIT
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");
        _;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "../JoeMaker.sol";

contract JoeMakerExploitMock {
    JoeMaker public immutable joeMaker;

    constructor(address _joeMaker) public {
        joeMaker = JoeMaker(_joeMaker);
    }

    function convert(address token0, address token1) external {
        joeMaker.convert(token0, token1);
    }
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "../boringcrypto/BoringOwnable.sol";
import "../libraries/SafeERC20.sol";

interface IRewarder {
    using SafeERC20 for IERC20;

    function onJoeReward(address user, uint256 newLpAmount) external;

    function pendingTokens(address user)
        external
        view
        returns (uint256 pending);
}

interface IMasterChefJoeV2 {
    using SafeERC20 for IERC20;

    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
    }

    struct PoolInfo {
        IERC20 lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this poolInfo. SUSHI to distribute per block.
        uint256 lastRewardTimestamp; // Last block timestamp that SUSHI distribution occurs.
        uint256 accJoePerShare; // Accumulated SUSHI per share, times 1e12. See below.
    }

    function poolInfo(uint256 pid) external view returns (PoolInfo memory);

    function totalAllocPoint() external view returns (uint256);

    function deposit(uint256 _pid, uint256 _amount) external;
}

/**
 * This is a sample contract to be used in the MasterChefJoeV2 contract for partners to reward
 * stakers with their native token alongside JOE.
 *
 * It assumes no minting rights, so requires a set amount of YOUR_TOKEN to be transferred to this contract prior.
 * E.g. say you've allocated 100,000 XYZ to the JOE-XYZ farm over 30 days. Then you would need to transfer
 * 100,000 XYZ and set the block reward accordingly so it's fully distributed after 30 days.
 *
 */
contract SimpleRewarderPerSec is IRewarder, BoringOwnable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    IERC20 public immutable rewardToken;
    IERC20 public immutable lpToken;
    IMasterChefJoeV2 public immutable MC_V2;

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

    /// @notice Info of each MCV2 poolInfo.
    /// `accTokenPerShare` Amount of YOUR_TOKEN each LP token is worth.
    /// `lastRewardTimestamp` The last timestamp YOUR_TOKEN was rewarded to the poolInfo.
    struct PoolInfo {
        uint256 accTokenPerShare;
        uint256 lastRewardTimestamp;
    }

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

    uint256 public tokenPerSec;
    uint256 private constant ACC_TOKEN_PRECISION = 1e12;

    event OnReward(address indexed user, uint256 amount);
    event RewardRateUpdated(uint256 oldRate, uint256 newRate);

    modifier onlyMCV2 {
        require(
            msg.sender == address(MC_V2),
            "onlyMCV2: only MasterChef V2 can call this function"
        );
        _;
    }

    constructor(
        IERC20 _rewardToken,
        IERC20 _lpToken,
        uint256 _tokenPerSec,
        IMasterChefJoeV2 _MCV2
    ) public {
        require(
            Address.isContract(address(_rewardToken)),
            "constructor: reward token must be a valid contract"
        );
        require(
            Address.isContract(address(_lpToken)),
            "constructor: LP token must be a valid contract"
        );
        require(
            Address.isContract(address(_MCV2)),
            "constructor: MasterChefJoeV2 must be a valid contract"
        );

        rewardToken = _rewardToken;
        lpToken = _lpToken;
        tokenPerSec = _tokenPerSec;
        MC_V2 = _MCV2;
        poolInfo = PoolInfo({
            lastRewardTimestamp: block.timestamp,
            accTokenPerShare: 0
        });
    }

    /// @notice Update reward variables of the given poolInfo.
    /// @return pool Returns the pool that was updated.
    function updatePool() public returns (PoolInfo memory pool) {
        pool = poolInfo;

        if (block.timestamp > pool.lastRewardTimestamp) {
            uint256 lpSupply = lpToken.balanceOf(address(MC_V2));

            if (lpSupply > 0) {
                uint256 timeElapsed = block.timestamp.sub(
                    pool.lastRewardTimestamp
                );
                uint256 tokenReward = timeElapsed.mul(tokenPerSec);
                pool.accTokenPerShare = pool.accTokenPerShare.add(
                    (tokenReward.mul(ACC_TOKEN_PRECISION) / lpSupply)
                );
            }

            pool.lastRewardTimestamp = block.timestamp;
            poolInfo = pool;
        }
    }

    /// @notice Sets the distribution reward rate. This will also update the poolInfo.
    /// @param _tokenPerSec The number of tokens to distribute per second
    function setRewardRate(uint256 _tokenPerSec) external onlyOwner {
        updatePool();

        uint256 oldRate = tokenPerSec;
        tokenPerSec = _tokenPerSec;

        emit RewardRateUpdated(oldRate, _tokenPerSec);
    }

    /// @notice Function called by MasterChefJoeV2 whenever staker claims JOE harvest. Allows staker to also receive a 2nd reward token.
    /// @param _user Address of user
    /// @param _lpAmount Number of LP tokens the user has
    function onJoeReward(address _user, uint256 _lpAmount)
        external
        override
        onlyMCV2
    {
        updatePool();
        PoolInfo memory pool = poolInfo;
        UserInfo storage user = userInfo[_user];
        uint256 pending;
        // if user had deposited
        if (user.amount > 0) {
            pending = (user.amount.mul(pool.accTokenPerShare) /
                ACC_TOKEN_PRECISION)
            .sub(user.rewardDebt);
            uint256 balance = rewardToken.balanceOf(address(this));
            if (pending > balance) {
                rewardToken.safeTransfer(_user, balance);
            } else {
                rewardToken.safeTransfer(_user, pending);
            }
        }

        user.amount = _lpAmount;
        user.rewardDebt =
            user.amount.mul(pool.accTokenPerShare) /
            ACC_TOKEN_PRECISION;

        emit OnReward(_user, pending);
    }

    /// @notice View function to see pending tokens
    /// @param _user Address of user.
    /// @return pending reward for a given user.
    function pendingTokens(address _user)
        external
        view
        override
        returns (uint256 pending)
    {
        PoolInfo memory pool = poolInfo;
        UserInfo storage user = userInfo[_user];

        uint256 accTokenPerShare = poolInfo.accTokenPerShare;
        uint256 lpSupply = lpToken.balanceOf(address(MC_V2));

        if (block.timestamp > poolInfo.lastRewardTimestamp && lpSupply != 0) {
            uint256 timeElapsed = block.timestamp.sub(
                poolInfo.lastRewardTimestamp
            );
            uint256 tokenReward = timeElapsed.mul(tokenPerSec);
            accTokenPerShare = accTokenPerShare.add(
                tokenReward.mul(ACC_TOKEN_PRECISION) / lpSupply
            );
        }

        pending = (user.amount.mul(accTokenPerShare) / ACC_TOKEN_PRECISION).sub(
            user.rewardDebt
        );
    }

    /// @notice In case rewarder is stopped before emissions finished, this function allows
    /// withdrawal of remaining tokens.
    function emergencyWithdraw() public onlyOwner {
        rewardToken.safeTransfer(
            address(msg.sender),
            rewardToken.balanceOf(address(this))
        );
    }
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "../boringcrypto/BoringOwnable.sol";
import "../libraries/SafeERC20.sol";

interface IRewarder {
    using SafeERC20 for IERC20;

    function onJoeReward(address user, uint256 newLpAmount) external;

    function pendingTokens(address user)
        external
        view
        returns (uint256 pending);
}

interface IMasterChefJoeV2 {
    using SafeERC20 for IERC20;

    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
    }

    struct PoolInfo {
        IERC20 lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this poolInfo. SUSHI to distribute per block.
        uint256 lastRewardTimestamp; // Last block timestamp that SUSHI distribution occurs.
        uint256 accJoePerShare; // Accumulated SUSHI per share, times 1e12. See below.
    }

    function poolInfo(uint256 pid) external view returns (PoolInfo memory);

    function totalAllocPoint() external view returns (uint256);

    function deposit(uint256 _pid, uint256 _amount) external;
}

/**
 * This is a sample contract to be used in the MasterChefJoeV2 contract for partners to reward
 * stakers with their native token alongside JOE.
 *
 * It assumes no minting rights, so requires a set amount of YOUR_TOKEN to be transferred to this contract prior.
 * E.g. say you've allocated 100,000 XYZ to the JOE-XYZ farm over 30 days. Then you would need to transfer
 * 100,000 XYZ and set the block reward accordingly so it's fully distributed after 30 days.
 *
 */
contract SimpleRewarderPerBlockDumbCoin is IRewarder, BoringOwnable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    IERC20 public immutable rewardToken;
    IERC20 public immutable lpToken;
    IMasterChefJoeV2 public immutable MC_V2;

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

    /// @notice Info of each MCV2 poolInfo.
    /// `accTokenPerShare` Amount of YOUR_TOKEN each LP token is worth.
    /// `lastRewardBlock` The last block YOUR_TOKEN was rewarded to the poolInfo.
    struct PoolInfo {
        uint256 accTokenPerShare;
        uint256 lastRewardBlock;
    }

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

    uint256 public tokenPerBlock;
    uint256 private constant ACC_TOKEN_PRECISION = 1e12;

    event OnReward(address indexed user, uint256 amount);
    event RewardRateUpdated(uint256 oldRate, uint256 newRate);

    modifier onlyMCV2 {
        require(
            msg.sender == address(MC_V2),
            "onlyMCV2: only MasterChef V2 can call this function"
        );
        _;
    }

    constructor(
        IERC20 _rewardToken,
        IERC20 _lpToken,
        uint256 _tokenPerBlock,
        IMasterChefJoeV2 _MCV2
    ) public {
        require(
            Address.isContract(address(_rewardToken)),
            "constructor: reward token must be a valid contract"
        );
        require(
            Address.isContract(address(_lpToken)),
            "constructor: LP token must be a valid contract"
        );
        require(
            Address.isContract(address(_MCV2)),
            "constructor: MasterChefJoeV2 must be a valid contract"
        );

        rewardToken = _rewardToken;
        lpToken = _lpToken;
        tokenPerBlock = _tokenPerBlock;
        MC_V2 = _MCV2;
        poolInfo = PoolInfo({
            lastRewardBlock: block.number,
            accTokenPerShare: 0
        });
    }

    /// @notice Update reward variables of the given poolInfo.
    /// @return pool Returns the pool that was updated.
    function updatePool() public returns (PoolInfo memory pool) {
        pool = poolInfo;

        if (block.number > pool.lastRewardBlock) {
            uint256 lpSupply = lpToken.balanceOf(address(MC_V2));

            if (lpSupply > 0) {
                uint256 blocks = block.number.sub(pool.lastRewardBlock);
                uint256 tokenReward = blocks.mul(tokenPerBlock);
                pool.accTokenPerShare = pool.accTokenPerShare.add(
                    (tokenReward.mul(ACC_TOKEN_PRECISION) / lpSupply)
                );
            }

            pool.lastRewardBlock = block.number;
            poolInfo = pool;
        }
    }

    /// @notice Sets the distribution reward rate. This will also update the poolInfo.
    /// @param _tokenPerBlock The number of tokens to distribute per block
    function setRewardRate(uint256 _tokenPerBlock) external onlyOwner {
        updatePool();

        uint256 oldRate = tokenPerBlock;
        tokenPerBlock = _tokenPerBlock;

        emit RewardRateUpdated(oldRate, _tokenPerBlock);
    }

    /// @notice Function called by MasterChefJoeV2 whenever staker claims JOE harvest. Allows staker to also receive a 2nd reward token.
    /// @param _user Address of user
    /// @param _lpAmount Number of LP tokens the user has
    function onJoeReward(address _user, uint256 _lpAmount)
        external
        override
        onlyMCV2
    {
        updatePool();
        PoolInfo memory pool = poolInfo;
        UserInfo storage user = userInfo[_user];
        uint256 pending;
        // if user had deposited
        if (user.amount > 0) {
            pending = (user.amount.mul(pool.accTokenPerShare) /
                ACC_TOKEN_PRECISION)
            .sub(user.rewardDebt);
            uint256 balance = rewardToken.balanceOf(address(this));
            if (pending > balance) {
                rewardToken.safeTransfer(_user, balance);
            } else {
                rewardToken.safeTransfer(_user, pending);
            }
        }

        user.amount = _lpAmount;
        user.rewardDebt =
            user.amount.mul(pool.accTokenPerShare) /
            ACC_TOKEN_PRECISION;

        emit OnReward(_user, pending);
    }

    /// @notice View function to see pending tokens
    /// @param _user Address of user.
    /// @return pending reward for a given user.
    function pendingTokens(address _user)
        external
        view
        override
        returns (uint256 pending)
    {
        PoolInfo memory pool = poolInfo;
        UserInfo storage user = userInfo[_user];

        uint256 accTokenPerShare = poolInfo.accTokenPerShare;
        uint256 lpSupply = lpToken.balanceOf(address(MC_V2));

        if (block.number > poolInfo.lastRewardBlock && lpSupply != 0) {
            uint256 blocks = block.number.sub(poolInfo.lastRewardBlock);
            uint256 tokenReward = blocks.mul(tokenPerBlock);
            accTokenPerShare = accTokenPerShare.add(
                tokenReward.mul(ACC_TOKEN_PRECISION) / lpSupply
            );
        }

        pending = (user.amount.mul(accTokenPerShare) / ACC_TOKEN_PRECISION).sub(
            user.rewardDebt
        );
    }

    /// @notice In case rewarder is stopped before emissions finished, this function allows
    /// withdrawal of remaining tokens.
    function emergencyWithdraw() public onlyOwner {
        rewardToken.safeTransfer(
            address(msg.sender),
            rewardToken.balanceOf(address(this))
        );
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

// SushiToken with Governance.
contract SushiToken is ERC20("SushiToken", "SUSHI"), Ownable {
    /// @notice Creates `_amount` token to `_to`. Must only be called by the owner (MasterChef).
    function mint(address _to, uint256 _amount) public onlyOwner {
        _mint(_to, _amount);
        _moveDelegates(address(0), _delegates[_to], _amount);
    }

    // Copied and modified from YAM code:
    // https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernanceStorage.sol
    // https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernance.sol
    // Which is copied and modified from COMPOUND:
    // https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/Comp.sol

    /// @notice A record of each accounts delegate
    mapping(address => address) internal _delegates;

    /// @notice A checkpoint for marking number of votes from a given block
    struct Checkpoint {
        uint32 fromBlock;
        uint256 votes;
    }

    /// @notice A record of votes checkpoints for each account, by index
    mapping(address => mapping(uint32 => Checkpoint)) public checkpoints;

    /// @notice The number of checkpoints for each account
    mapping(address => uint32) public numCheckpoints;

    /// @notice The EIP-712 typehash for the contract's domain
    bytes32 public constant DOMAIN_TYPEHASH =
        keccak256(
            "EIP712Domain(string name,uint256 chainId,address verifyingContract)"
        );

    /// @notice The EIP-712 typehash for the delegation struct used by the contract
    bytes32 public constant DELEGATION_TYPEHASH =
        keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");

    /// @notice A record of states for signing / validating signatures
    mapping(address => uint256) public nonces;

    /// @notice An event thats emitted when an account changes its delegate
    event DelegateChanged(
        address indexed delegator,
        address indexed fromDelegate,
        address indexed toDelegate
    );

    /// @notice An event thats emitted when a delegate account's vote balance changes
    event DelegateVotesChanged(
        address indexed delegate,
        uint256 previousBalance,
        uint256 newBalance
    );

    /**
     * @notice Delegate votes from `msg.sender` to `delegatee`
     * @param delegator The address to get delegatee for
     */
    function delegates(address delegator) external view returns (address) {
        return _delegates[delegator];
    }

    /**
     * @notice Delegate votes from `msg.sender` to `delegatee`
     * @param delegatee The address to delegate votes to
     */
    function delegate(address delegatee) external {
        return _delegate(msg.sender, delegatee);
    }

    /**
     * @notice Delegates votes from signatory to `delegatee`
     * @param delegatee The address to delegate votes to
     * @param nonce The contract state required to match the signature
     * @param expiry The time at which to expire the signature
     * @param v The recovery byte of the signature
     * @param r Half of the ECDSA signature pair
     * @param s Half of the ECDSA signature pair
     */
    function delegateBySig(
        address delegatee,
        uint256 nonce,
        uint256 expiry,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external {
        bytes32 domainSeparator = keccak256(
            abi.encode(
                DOMAIN_TYPEHASH,
                keccak256(bytes(name())),
                getChainId(),
                address(this)
            )
        );

        bytes32 structHash = keccak256(
            abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry)
        );

        bytes32 digest = keccak256(
            abi.encodePacked("\x19\x01", domainSeparator, structHash)
        );

        address signatory = ecrecover(digest, v, r, s);
        require(
            signatory != address(0),
            "SUSHI::delegateBySig: invalid signature"
        );
        require(
            nonce == nonces[signatory]++,
            "SUSHI::delegateBySig: invalid nonce"
        );
        require(now <= expiry, "SUSHI::delegateBySig: signature expired");
        return _delegate(signatory, delegatee);
    }

    /**
     * @notice Gets the current votes balance for `account`
     * @param account The address to get votes balance
     * @return The number of current votes for `account`
     */
    function getCurrentVotes(address account) external view returns (uint256) {
        uint32 nCheckpoints = numCheckpoints[account];
        return
            nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
    }

    /**
     * @notice Determine the prior number of votes for an account as of a block number
     * @dev Block number must be a finalized block or else this function will revert to prevent misinformation.
     * @param account The address of the account to check
     * @param blockNumber The block number to get the vote balance at
     * @return The number of votes the account had as of the given block
     */
    function getPriorVotes(address account, uint256 blockNumber)
        external
        view
        returns (uint256)
    {
        require(
            blockNumber < block.number,
            "SUSHI::getPriorVotes: not yet determined"
        );

        uint32 nCheckpoints = numCheckpoints[account];
        if (nCheckpoints == 0) {
            return 0;
        }

        // First check most recent balance
        if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
            return checkpoints[account][nCheckpoints - 1].votes;
        }

        // Next check implicit zero balance
        if (checkpoints[account][0].fromBlock > blockNumber) {
            return 0;
        }

        uint32 lower = 0;
        uint32 upper = nCheckpoints - 1;
        while (upper > lower) {
            uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
            Checkpoint memory cp = checkpoints[account][center];
            if (cp.fromBlock == blockNumber) {
                return cp.votes;
            } else if (cp.fromBlock < blockNumber) {
                lower = center;
            } else {
                upper = center - 1;
            }
        }
        return checkpoints[account][lower].votes;
    }

    function _delegate(address delegator, address delegatee) internal {
        address currentDelegate = _delegates[delegator];
        uint256 delegatorBalance = balanceOf(delegator); // balance of underlying SUSHIs (not scaled);
        _delegates[delegator] = delegatee;

        emit DelegateChanged(delegator, currentDelegate, delegatee);

        _moveDelegates(currentDelegate, delegatee, delegatorBalance);
    }

    function _moveDelegates(
        address srcRep,
        address dstRep,
        uint256 amount
    ) internal {
        if (srcRep != dstRep && amount > 0) {
            if (srcRep != address(0)) {
                // decrease old representative
                uint32 srcRepNum = numCheckpoints[srcRep];
                uint256 srcRepOld = srcRepNum > 0
                    ? checkpoints[srcRep][srcRepNum - 1].votes
                    : 0;
                uint256 srcRepNew = srcRepOld.sub(amount);
                _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
            }

            if (dstRep != address(0)) {
                // increase new representative
                uint32 dstRepNum = numCheckpoints[dstRep];
                uint256 dstRepOld = dstRepNum > 0
                    ? checkpoints[dstRep][dstRepNum - 1].votes
                    : 0;
                uint256 dstRepNew = dstRepOld.add(amount);
                _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
            }
        }
    }

    function _writeCheckpoint(
        address delegatee,
        uint32 nCheckpoints,
        uint256 oldVotes,
        uint256 newVotes
    ) internal {
        uint32 blockNumber = safe32(
            block.number,
            "SUSHI::_writeCheckpoint: block number exceeds 32 bits"
        );

        if (
            nCheckpoints > 0 &&
            checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber
        ) {
            checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
        } else {
            checkpoints[delegatee][nCheckpoints] = Checkpoint(
                blockNumber,
                newVotes
            );
            numCheckpoints[delegatee] = nCheckpoints + 1;
        }

        emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
    }

    function safe32(uint256 n, string memory errorMessage)
        internal
        pure
        returns (uint32)
    {
        require(n < 2**32, errorMessage);
        return uint32(n);
    }

    function getChainId() internal pure returns (uint256) {
        uint256 chainId;
        assembly {
            chainId := chainid()
        }
        return chainId;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) public {
        _name = name_;
        _symbol = symbol_;
        _decimals = 18;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
     * called.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal virtual {
        _decimals = decimals_;
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./SushiToken.sol";

// MasterChef is the master of Sushi. He can make Sushi and he is a fair guy.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once SUSHI is sufficiently
// distributed and the community can show to govern itself.
//
// Have fun reading it. Hopefully it's bug-free. God bless.
contract MasterChefPerSec is Ownable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;
    // Info of each user.
    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
        //
        // We do some fancy math here. Basically, any point in time, the amount of SUSHIs
        // entitled to a user but is pending to be distributed is:
        //
        //   pending reward = (user.amount * pool.accSushiPerShare) - user.rewardDebt
        //
        // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
        //   1. The pool's `accSushiPerShare` (and `lastRewardBlock`) gets updated.
        //   2. User receives the pending reward sent to his/her address.
        //   3. User's `amount` gets updated.
        //   4. User's `rewardDebt` gets updated.
    }
    // Info of each pool.
    struct PoolInfo {
        IERC20 lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this pool. SUSHIs to distribute per block.
        uint256 lastRewardTimestamp; // Last block number that SUSHIs distribution occurs.
        uint256 accSushiPerShare; // Accumulated SUSHIs per share, times 1e12. See below.
    }
    // The SUSHI TOKEN!
    SushiToken public sushi;
    // Dev address.
    address public devaddr;
    // Block number when bonus SUSHI period ends.
    uint256 public bonusEndTimestamp;
    // SUSHI tokens created per block.
    uint256 public sushiPerSec;
    // Bonus muliplier for early sushi makers.
    uint256 public constant BONUS_MULTIPLIER = 1;
    // Info of each pool.
    PoolInfo[] public poolInfo;
    // Info of each user that stakes LP tokens.
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;
    // Total allocation poitns. Must be the sum of all allocation points in all pools.
    uint256 public totalAllocPoint = 0;
    // The block number when SUSHI mining starts.
    uint256 public startTimestamp;
    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event EmergencyWithdraw(
        address indexed user,
        uint256 indexed pid,
        uint256 amount
    );

    constructor(
        SushiToken _sushi,
        address _devaddr,
        uint256 _sushiPerSec,
        uint256 _startTimestamp,
        uint256 _bonusEndTimestamp
    ) public {
        sushi = _sushi;
        devaddr = _devaddr;
        sushiPerSec = _sushiPerSec;
        bonusEndTimestamp = _bonusEndTimestamp;
        startTimestamp = _startTimestamp;
    }

    function poolLength() external view returns (uint256) {
        return poolInfo.length;
    }

    // Add a new lp to the pool. Can only be called by the owner.
    // XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.
    function add(
        uint256 _allocPoint,
        IERC20 _lpToken,
        bool _withUpdate
    ) public onlyOwner {
        if (_withUpdate) {
            massUpdatePools();
        }
        uint256 lastRewardTimestamp = block.timestamp > startTimestamp
            ? block.timestamp
            : startTimestamp;
        totalAllocPoint = totalAllocPoint.add(_allocPoint);
        poolInfo.push(
            PoolInfo({
                lpToken: _lpToken,
                allocPoint: _allocPoint,
                lastRewardTimestamp: lastRewardTimestamp,
                accSushiPerShare: 0
            })
        );
    }

    // Update the given pool's SUSHI allocation point. Can only be called by the owner.
    function set(
        uint256 _pid,
        uint256 _allocPoint,
        bool _withUpdate
    ) public onlyOwner {
        if (_withUpdate) {
            massUpdatePools();
        }
        totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(
            _allocPoint
        );
        poolInfo[_pid].allocPoint = _allocPoint;
    }

    // Return reward multiplier over the given _from to _to block.
    function getMultiplier(uint256 _from, uint256 _to)
        public
        view
        returns (uint256)
    {
        if (_to <= bonusEndTimestamp) {
            return _to.sub(_from).mul(BONUS_MULTIPLIER);
        } else if (_from >= bonusEndTimestamp) {
            return _to.sub(_from);
        } else {
            return
                bonusEndTimestamp.sub(_from).mul(BONUS_MULTIPLIER).add(
                    _to.sub(bonusEndTimestamp)
                );
        }
    }

    // View function to see pending SUSHIs on frontend.
    function pendingSushi(uint256 _pid, address _user)
        external
        view
        returns (uint256)
    {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accSushiPerShare = pool.accSushiPerShare;
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (block.timestamp > pool.lastRewardTimestamp && lpSupply != 0) {
            uint256 multiplier = getMultiplier(
                pool.lastRewardTimestamp,
                block.timestamp
            );
            uint256 sushiReward = multiplier
            .mul(sushiPerSec)
            .mul(pool.allocPoint)
            .div(totalAllocPoint);
            accSushiPerShare = accSushiPerShare.add(
                sushiReward.mul(1e12).div(lpSupply)
            );
        }
        return user.amount.mul(accSushiPerShare).div(1e12).sub(user.rewardDebt);
    }

    // Update reward vairables for all pools. Be careful of gas spending!
    function massUpdatePools() public {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            updatePool(pid);
        }
    }

    // Update reward variables of the given pool to be up-to-date.
    function updatePool(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        if (block.timestamp <= pool.lastRewardTimestamp) {
            return;
        }
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (lpSupply == 0) {
            pool.lastRewardTimestamp = block.timestamp;
            return;
        }
        uint256 multiplier = getMultiplier(
            pool.lastRewardTimestamp,
            block.timestamp
        );
        uint256 sushiReward = multiplier
        .mul(sushiPerSec)
        .mul(pool.allocPoint)
        .div(totalAllocPoint);
        sushi.mint(devaddr, sushiReward.div(10));
        sushi.mint(address(this), sushiReward);
        pool.accSushiPerShare = pool.accSushiPerShare.add(
            sushiReward.mul(1e12).div(lpSupply)
        );
        pool.lastRewardTimestamp = block.timestamp;
    }

    // Deposit LP tokens to MasterChef for SUSHI allocation.
    function deposit(uint256 _pid, uint256 _amount) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        updatePool(_pid);
        if (user.amount > 0) {
            uint256 pending = user
            .amount
            .mul(pool.accSushiPerShare)
            .div(1e12)
            .sub(user.rewardDebt);
            safeSushiTransfer(msg.sender, pending);
        }
        pool.lpToken.safeTransferFrom(
            address(msg.sender),
            address(this),
            _amount
        );
        user.amount = user.amount.add(_amount);
        user.rewardDebt = user.amount.mul(pool.accSushiPerShare).div(1e12);
        emit Deposit(msg.sender, _pid, _amount);
    }

    // Withdraw LP tokens from MasterChef.
    function withdraw(uint256 _pid, uint256 _amount) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        require(user.amount >= _amount, "withdraw: not good");
        updatePool(_pid);
        uint256 pending = user.amount.mul(pool.accSushiPerShare).div(1e12).sub(
            user.rewardDebt
        );
        safeSushiTransfer(msg.sender, pending);
        user.amount = user.amount.sub(_amount);
        user.rewardDebt = user.amount.mul(pool.accSushiPerShare).div(1e12);
        pool.lpToken.safeTransfer(address(msg.sender), _amount);
        emit Withdraw(msg.sender, _pid, _amount);
    }

    // Withdraw without caring about rewards. EMERGENCY ONLY.
    function emergencyWithdraw(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        pool.lpToken.safeTransfer(address(msg.sender), user.amount);
        emit EmergencyWithdraw(msg.sender, _pid, user.amount);
        user.amount = 0;
        user.rewardDebt = 0;
    }

    // Safe sushi transfer function, just in case if rounding error causes pool to not have enough SUSHIs.
    function safeSushiTransfer(address _to, uint256 _amount) internal {
        uint256 sushiBal = sushi.balanceOf(address(this));
        if (_amount > sushiBal) {
            sushi.transfer(_to, sushiBal);
        } else {
            sushi.transfer(_to, _amount);
        }
    }

    // Update dev address by the previous dev.
    function dev(address _devaddr) public {
        require(msg.sender == devaddr, "dev: wut?");
        devaddr = _devaddr;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;

        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping (bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) { // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
            // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.

            bytes32 lastvalue = set._values[lastIndex];

            // Move the last value to the index where the value to delete is
            set._values[toDeleteIndex] = lastvalue;
            // Update the index for the moved value
            set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        require(set._values.length > index, "EnumerableSet: index out of bounds");
        return set._values[index];
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }


    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./SushiToken.sol";

// MasterChef is the master of Sushi. He can make Sushi and he is a fair guy.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once SUSHI is sufficiently
// distributed and the community can show to govern itself.
//
// Have fun reading it. Hopefully it's bug-free. God bless.
contract MasterChef is Ownable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;
    // Info of each user.
    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
        //
        // We do some fancy math here. Basically, any point in time, the amount of SUSHIs
        // entitled to a user but is pending to be distributed is:
        //
        //   pending reward = (user.amount * pool.accSushiPerShare) - user.rewardDebt
        //
        // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
        //   1. The pool's `accSushiPerShare` (and `lastRewardBlock`) gets updated.
        //   2. User receives the pending reward sent to his/her address.
        //   3. User's `amount` gets updated.
        //   4. User's `rewardDebt` gets updated.
    }
    // Info of each pool.
    struct PoolInfo {
        IERC20 lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this pool. SUSHIs to distribute per block.
        uint256 lastRewardBlock; // Last block number that SUSHIs distribution occurs.
        uint256 accSushiPerShare; // Accumulated SUSHIs per share, times 1e12. See below.
    }
    // The SUSHI TOKEN!
    SushiToken public sushi;
    // Dev address.
    address public devaddr;
    // Block number when bonus SUSHI period ends.
    uint256 public bonusEndBlock;
    // SUSHI tokens created per block.
    uint256 public sushiPerBlock;
    // Bonus muliplier for early sushi makers.
    uint256 public constant BONUS_MULTIPLIER = 1;
    // Info of each pool.
    PoolInfo[] public poolInfo;
    // Info of each user that stakes LP tokens.
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;
    // Total allocation poitns. Must be the sum of all allocation points in all pools.
    uint256 public totalAllocPoint = 0;
    // The block number when SUSHI mining starts.
    uint256 public startBlock;
    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event EmergencyWithdraw(
        address indexed user,
        uint256 indexed pid,
        uint256 amount
    );

    constructor(
        SushiToken _sushi,
        address _devaddr,
        uint256 _sushiPerBlock,
        uint256 _startBlock,
        uint256 _bonusEndBlock
    ) public {
        sushi = _sushi;
        devaddr = _devaddr;
        sushiPerBlock = _sushiPerBlock;
        bonusEndBlock = _bonusEndBlock;
        startBlock = _startBlock;
    }

    function poolLength() external view returns (uint256) {
        return poolInfo.length;
    }

    // Add a new lp to the pool. Can only be called by the owner.
    // XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.
    function add(
        uint256 _allocPoint,
        IERC20 _lpToken,
        bool _withUpdate
    ) public onlyOwner {
        if (_withUpdate) {
            massUpdatePools();
        }
        uint256 lastRewardBlock = block.number > startBlock
            ? block.number
            : startBlock;
        totalAllocPoint = totalAllocPoint.add(_allocPoint);
        poolInfo.push(
            PoolInfo({
                lpToken: _lpToken,
                allocPoint: _allocPoint,
                lastRewardBlock: lastRewardBlock,
                accSushiPerShare: 0
            })
        );
    }

    // Update the given pool's SUSHI allocation point. Can only be called by the owner.
    function set(
        uint256 _pid,
        uint256 _allocPoint,
        bool _withUpdate
    ) public onlyOwner {
        if (_withUpdate) {
            massUpdatePools();
        }
        totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(
            _allocPoint
        );
        poolInfo[_pid].allocPoint = _allocPoint;
    }

    // Return reward multiplier over the given _from to _to block.
    function getMultiplier(uint256 _from, uint256 _to)
        public
        view
        returns (uint256)
    {
        if (_to <= bonusEndBlock) {
            return _to.sub(_from).mul(BONUS_MULTIPLIER);
        } else if (_from >= bonusEndBlock) {
            return _to.sub(_from);
        } else {
            return
                bonusEndBlock.sub(_from).mul(BONUS_MULTIPLIER).add(
                    _to.sub(bonusEndBlock)
                );
        }
    }

    // View function to see pending SUSHIs on frontend.
    function pendingSushi(uint256 _pid, address _user)
        external
        view
        returns (uint256)
    {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accSushiPerShare = pool.accSushiPerShare;
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (block.number > pool.lastRewardBlock && lpSupply != 0) {
            uint256 multiplier = getMultiplier(
                pool.lastRewardBlock,
                block.number
            );
            uint256 sushiReward = multiplier
            .mul(sushiPerBlock)
            .mul(pool.allocPoint)
            .div(totalAllocPoint);
            accSushiPerShare = accSushiPerShare.add(
                sushiReward.mul(1e12).div(lpSupply)
            );
        }
        return user.amount.mul(accSushiPerShare).div(1e12).sub(user.rewardDebt);
    }

    // Update reward vairables for all pools. Be careful of gas spending!
    function massUpdatePools() public {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            updatePool(pid);
        }
    }

    // Update reward variables of the given pool to be up-to-date.
    function updatePool(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        if (block.number <= pool.lastRewardBlock) {
            return;
        }
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (lpSupply == 0) {
            pool.lastRewardBlock = block.number;
            return;
        }
        uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
        uint256 sushiReward = multiplier
        .mul(sushiPerBlock)
        .mul(pool.allocPoint)
        .div(totalAllocPoint);
        sushi.mint(devaddr, sushiReward.div(10));
        sushi.mint(address(this), sushiReward);
        pool.accSushiPerShare = pool.accSushiPerShare.add(
            sushiReward.mul(1e12).div(lpSupply)
        );
        pool.lastRewardBlock = block.number;
    }

    // Deposit LP tokens to MasterChef for SUSHI allocation.
    function deposit(uint256 _pid, uint256 _amount) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        updatePool(_pid);
        if (user.amount > 0) {
            uint256 pending = user
            .amount
            .mul(pool.accSushiPerShare)
            .div(1e12)
            .sub(user.rewardDebt);
            safeSushiTransfer(msg.sender, pending);
        }
        pool.lpToken.safeTransferFrom(
            address(msg.sender),
            address(this),
            _amount
        );
        user.amount = user.amount.add(_amount);
        user.rewardDebt = user.amount.mul(pool.accSushiPerShare).div(1e12);
        emit Deposit(msg.sender, _pid, _amount);
    }

    // Withdraw LP tokens from MasterChef.
    function withdraw(uint256 _pid, uint256 _amount) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        require(user.amount >= _amount, "withdraw: not good");
        updatePool(_pid);
        uint256 pending = user.amount.mul(pool.accSushiPerShare).div(1e12).sub(
            user.rewardDebt
        );
        safeSushiTransfer(msg.sender, pending);
        user.amount = user.amount.sub(_amount);
        user.rewardDebt = user.amount.mul(pool.accSushiPerShare).div(1e12);
        pool.lpToken.safeTransfer(address(msg.sender), _amount);
        emit Withdraw(msg.sender, _pid, _amount);
    }

    // Withdraw without caring about rewards. EMERGENCY ONLY.
    function emergencyWithdraw(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        pool.lpToken.safeTransfer(address(msg.sender), user.amount);
        emit EmergencyWithdraw(msg.sender, _pid, user.amount);
        user.amount = 0;
        user.rewardDebt = 0;
    }

    // Safe sushi transfer function, just in case if rounding error causes pool to not have enough SUSHIs.
    function safeSushiTransfer(address _to, uint256 _amount) internal {
        uint256 sushiBal = sushi.balanceOf(address(this));
        if (_amount > sushiBal) {
            sushi.transfer(_to, sushiBal);
        } else {
            sushi.transfer(_to, _amount);
        }
    }

    // Update dev address by the previous dev.
    function dev(address _devaddr) public {
        require(msg.sender == devaddr, "dev: wut?");
        devaddr = _devaddr;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./SmartCoin.sol";
import "./MasterChefJoeV2.sol";
import "./libraries/BoringERC20.sol";

// MasterChefJoe is a boss. He says "go f your blocks lego boy, I'm gonna use timestamp instead".
// And to top it off, it takes no risks. Because the biggest risk is operator error.
// So we make it virtually impossible for the operator of this contract to cause a bug with people's harvests.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once JOE is sufficiently
// distributed and the community can show to govern itself.
//
// With thanks to the Lydia Finance team.
//
// Godspeed and may the 10x be with you.
contract MasterChefSmartCoinV2 is MasterChefJoeV2 {
    constructor(
        SmartCoin _smartcoin,
        address _devAddr,
        address _treasuryAddr,
        address _investorAddr,
        uint256 _joePerSec,
        uint256 _startTimestamp,
        uint256 _devPercent,
        uint256 _treasuryPercent,
        uint256 _investorPercent
    ) MasterChefJoeV2(
        _smartcoin,
        _devAddr,
        _treasuryAddr,
        _investorAddr,
        _joePerSec,
        _startTimestamp,
        _devPercent,
        _treasuryPercent,
        _investorPercent
    ) public {}
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./JoeToken.sol";

contract SmartCoin is JoeToken {
    constructor(string memory name, string memory symbol) ERC20(name, symbol) public {}
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;


import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./JoeToken.sol";
import "./libraries/BoringERC20.sol";

interface IRewarder {
    using SafeERC20 for IERC20;

    function onJoeReward(address user, uint256 newLpAmount) external;

    function pendingTokens(address user)
        external
        view
        returns (uint256 pending);

    function rewardToken() external view returns (address);
}

// MasterChefJoe is a boss. He says "go f your blocks lego boy, I'm gonna use timestamp instead".
// And to top it off, it takes no risks. Because the biggest risk is operator error.
// So we make it virtually impossible for the operator of this contract to cause a bug with people's harvests.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once JOE is sufficiently
// distributed and the community can show to govern itself.
//
// With thanks to the Lydia Finance team.
//
// Godspeed and may the 10x be with you.
contract MasterChefJoeV2 is Ownable {
    using SafeMath for uint256;
    using BoringERC20 for IERC20;
    using EnumerableSet for EnumerableSet.AddressSet;

    // Info of each user.
    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
        //
        // We do some fancy math here. Basically, any point in time, the amount of JOEs
        // entitled to a user but is pending to be distributed is:
        //
        //   pending reward = (user.amount * pool.accJoePerShare) - user.rewardDebt
        //
        // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
        //   1. The pool's `accJoePerShare` (and `lastRewardTimestamp`) gets updated.
        //   2. User receives the pending reward sent to his/her address.
        //   3. User's `amount` gets updated.
        //   4. User's `rewardDebt` gets updated.
    }

    // Info of each pool.
    struct PoolInfo {
        IERC20 lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this pool. JOEs to distribute per second.
        uint256 lastRewardTimestamp; // Last timestamp that JOEs distribution occurs.
        uint256 accJoePerShare; // Accumulated JOEs per share, times 1e12. See below.
        IRewarder rewarder;
    }

    // The JOE TOKEN!
    JoeToken public joe;
    // Dev address.
    address public devAddr;
    // Treasury address.
    address public treasuryAddr;
    // Investor address
    address public investorAddr;
    // JOE tokens created per second.
    uint256 public joePerSec;
    // Percentage of pool rewards that goto the devs.
    uint256 public devPercent;
    // Percentage of pool rewards that goes to the treasury.
    uint256 public treasuryPercent;
    // Percentage of pool rewards that goes to the investor.
    uint256 public investorPercent;

    // Info of each pool.
    PoolInfo[] public poolInfo;
    // Set of all LP tokens that have been added as pools
    EnumerableSet.AddressSet private lpTokens;
    // Info of each user that stakes LP tokens.
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;
    // Total allocation points. Must be the sum of all allocation points in all pools.
    uint256 public totalAllocPoint;
    // The timestamp when JOE mining starts.
    uint256 public startTimestamp;

    event Add(
        uint256 indexed pid,
        uint256 allocPoint,
        IERC20 indexed lpToken,
        IRewarder indexed rewarder
    );
    event Set(
        uint256 indexed pid,
        uint256 allocPoint,
        IRewarder indexed rewarder,
        bool overwrite
    );
    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event UpdatePool(
        uint256 indexed pid,
        uint256 lastRewardTimestamp,
        uint256 lpSupply,
        uint256 accJoePerShare
    );
    event Harvest(address indexed user, uint256 indexed pid, uint256 amount);
    event EmergencyWithdraw(
        address indexed user,
        uint256 indexed pid,
        uint256 amount
    );
    event SetDevAddress(address indexed oldAddress, address indexed newAddress);
    event UpdateEmissionRate(address indexed user, uint256 _joePerSec);

    constructor(
        JoeToken _joe,
        address _devAddr,
        address _treasuryAddr,
        address _investorAddr,
        uint256 _joePerSec,
        uint256 _startTimestamp,
        uint256 _devPercent,
        uint256 _treasuryPercent,
        uint256 _investorPercent
    ) public {
        require(
            0 <= _devPercent && _devPercent <= 1000,
            "constructor: invalid dev percent value"
        );
        require(
            0 <= _treasuryPercent && _treasuryPercent <= 1000,
            "constructor: invalid treasury percent value"
        );
        require(
            0 <= _investorPercent && _investorPercent <= 1000,
            "constructor: invalid investor percent value"
        );
        require(
            _devPercent + _treasuryPercent + _investorPercent <= 1000,
            "constructor: total percent over max"
        );
        joe = _joe;
        devAddr = _devAddr;
        treasuryAddr = _treasuryAddr;
        investorAddr = _investorAddr;
        joePerSec = _joePerSec;
        startTimestamp = _startTimestamp;
        devPercent = _devPercent;
        treasuryPercent = _treasuryPercent;
        investorPercent = _investorPercent;
        totalAllocPoint = 0;
    }

    function poolLength() external view returns (uint256) {
        return poolInfo.length;
    }

    // Add a new lp to the pool. Can only be called by the owner.
    // XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.
    function add(
        uint256 _allocPoint,
        IERC20 _lpToken,
        IRewarder _rewarder
    ) public onlyOwner {
        require(
            Address.isContract(address(_lpToken)),
            "add: LP token must be a valid contract"
        );
        require(
            Address.isContract(address(_rewarder)) ||
                address(_rewarder) == address(0),
            "add: rewarder must be contract or zero"
        );
        require(!lpTokens.contains(address(_lpToken)), "add: LP already added");
        massUpdatePools();
        uint256 lastRewardTimestamp = block.timestamp > startTimestamp
            ? block.timestamp
            : startTimestamp;
        totalAllocPoint = totalAllocPoint.add(_allocPoint);
        poolInfo.push(
            PoolInfo({
                lpToken: _lpToken,
                allocPoint: _allocPoint,
                lastRewardTimestamp: lastRewardTimestamp,
                accJoePerShare: 0,
                rewarder: _rewarder
            })
        );
        lpTokens.add(address(_lpToken));
        emit Add(poolInfo.length.sub(1), _allocPoint, _lpToken, _rewarder);
    }

    // Update the given pool's JOE allocation point. Can only be called by the owner.
    function set(
        uint256 _pid,
        uint256 _allocPoint,
        IRewarder _rewarder,
        bool overwrite
    ) public onlyOwner {
        require(
            Address.isContract(address(_rewarder)) ||
                address(_rewarder) == address(0),
            "set: rewarder must be contract or zero"
        );
        massUpdatePools();
        totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(
            _allocPoint
        );
        poolInfo[_pid].allocPoint = _allocPoint;
        if (overwrite) {
            poolInfo[_pid].rewarder = _rewarder;
        }
        emit Set(
            _pid,
            _allocPoint,
            overwrite ? _rewarder : poolInfo[_pid].rewarder,
            overwrite
        );
    }

    // View function to see pending JOEs on frontend.
    function pendingTokens(uint256 _pid, address _user)
        external
        view
        returns (
            uint256 pendingJoe,
            address bonusTokenAddress,
            string memory bonusTokenSymbol,
            uint256 pendingBonusToken
        )
    {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accJoePerShare = pool.accJoePerShare;
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (block.timestamp > pool.lastRewardTimestamp && lpSupply != 0) {
            uint256 multiplier = block.timestamp.sub(pool.lastRewardTimestamp);
            uint256 lpPercent = 1000 -
                devPercent -
                treasuryPercent -
                investorPercent;
            uint256 joeReward = multiplier
            .mul(joePerSec)
            .mul(pool.allocPoint)
            .div(totalAllocPoint)
            .mul(lpPercent)
            .div(1000);
            accJoePerShare = accJoePerShare.add(
                joeReward.mul(1e12).div(lpSupply)
            );
        }
        pendingJoe = user.amount.mul(accJoePerShare).div(1e12).sub(
            user.rewardDebt
        );

        // If it's a double reward farm, we return info about the bonus token
        if (address(pool.rewarder) != address(0)) {
            (bonusTokenAddress, bonusTokenSymbol) = rewarderBonusTokenInfo(
                _pid
            );
            pendingBonusToken = pool.rewarder.pendingTokens(_user);
        }
    }

    // Get bonus token info from the rewarder contract for a given pool, if it is a double reward farm
    function rewarderBonusTokenInfo(uint256 _pid)
        public
        view
        returns (address bonusTokenAddress, string memory bonusTokenSymbol)
    {
        PoolInfo storage pool = poolInfo[_pid];
        if (address(pool.rewarder) != address(0)) {
            bonusTokenAddress = address(pool.rewarder.rewardToken());
            bonusTokenSymbol = IERC20(pool.rewarder.rewardToken()).safeSymbol();
        }
    }

    // Update reward variables for all pools. Be careful of gas spending!
    function massUpdatePools() public {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            updatePool(pid);
        }
    }

    // Update reward variables of the given pool to be up-to-date.
    function updatePool(uint256 _pid) public  {
        PoolInfo storage pool = poolInfo[_pid];
        if (block.timestamp <= pool.lastRewardTimestamp) {
            return;
        }
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (lpSupply == 0) {
            pool.lastRewardTimestamp = block.timestamp;
            return;
        }
        uint256 multiplier = block.timestamp.sub(pool.lastRewardTimestamp);

        uint256 joeReward = multiplier.mul(joePerSec).mul(pool.allocPoint).div(
            totalAllocPoint
        );
        uint256 joeReward2 = multiplier.mul(joePerSec);
        uint256 lpPercent = 1000 -
            devPercent -
            treasuryPercent -
            investorPercent;



        joe.mint(devAddr, joeReward.mul(devPercent).div(1000));
        joe.mint(treasuryAddr, joeReward.mul(treasuryPercent).div(1000));
        joe.mint(investorAddr, joeReward.mul(investorPercent).div(1000));
        joe.mint(address(this), joeReward.mul(lpPercent).div(1000));

        pool.accJoePerShare = pool.accJoePerShare.add(
            joeReward.mul(1e12).div(lpSupply).mul(lpPercent).div(1000)
        );

        pool.lastRewardTimestamp = block.timestamp;
        emit UpdatePool(
            _pid,
            pool.lastRewardTimestamp,
            lpSupply,
            pool.accJoePerShare
        );
    }

    // Deposit LP tokens to MasterChef for JOE allocation.
    function deposit(uint256 _pid, uint256 _amount) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        updatePool(_pid);
        if (user.amount > 0) {
            // Harvest JOE
            uint256 pending = user
            .amount
            .mul(pool.accJoePerShare)
            .div(1e12)
            .sub(user.rewardDebt);

            safeJoeTransfer(msg.sender, pending);
            emit Harvest(msg.sender, _pid, pending);
        }
        user.amount = user.amount.add(_amount);
        user.rewardDebt = user.amount.mul(pool.accJoePerShare).div(1e12);

        IRewarder rewarder = poolInfo[_pid].rewarder;
        if (address(rewarder) != address(0)) {
            rewarder.onJoeReward(msg.sender, user.amount);
        }

        pool.lpToken.safeTransferFrom(
            address(msg.sender),
            address(this),
            _amount
        );
        emit Deposit(msg.sender, _pid, _amount);
    }

    // Withdraw LP tokens from MasterChef.
    function withdraw(uint256 _pid, uint256 _amount) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        require(user.amount >= _amount, "withdraw: not good");


        updatePool(_pid);

        // Harvest JOE
        uint256 pending = user.amount.mul(pool.accJoePerShare).div(1e12).sub(
            user.rewardDebt
        );
        safeJoeTransfer(msg.sender, pending);
        emit Harvest(msg.sender, _pid, pending);

        user.amount = user.amount.sub(_amount);
        user.rewardDebt = user.amount.mul(pool.accJoePerShare).div(1e12);

        IRewarder rewarder = poolInfo[_pid].rewarder;
        if (address(rewarder) != address(0)) {
            rewarder.onJoeReward(msg.sender, user.amount);
        }

        // pull withdraw fee from another contract
        // fee = _amount * .07
        // pool.lpToken.safeTransfer(address(smartFund), _amount);
        uint256 tax =_amount.mul(devPercent).div(1000);
        _amount = _amount.sub(tax);


        pool.lpToken.safeTransfer(address(msg.sender), _amount);
        pool.lpToken.safeTransfer(treasuryAddr, tax);

        emit Withdraw(msg.sender, _pid, _amount);
    }

    // Withdraw without caring about rewards. EMERGENCY ONLY.
    function emergencyWithdraw(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        pool.lpToken.safeTransfer(address(msg.sender), user.amount);
        emit EmergencyWithdraw(msg.sender, _pid, user.amount);
        user.amount = 0;
        user.rewardDebt = 0;
    }

    // Safe joe transfer function, just in case if rounding error causes pool to not have enough JOEs.
    function safeJoeTransfer(address _to, uint256 _amount) internal {
        uint256 joeBal = joe.balanceOf(address(this));
        if (_amount > joeBal) {
            joe.transfer(_to, joeBal);
        } else {
            joe.transfer(_to, _amount);
        }
    }

    // Update dev address by the previous dev.
    function dev(address _devAddr) public {
        require(msg.sender == devAddr, "dev: wut?");
        devAddr = _devAddr;
        emit SetDevAddress(msg.sender, _devAddr);
    }

    function setDevPercent(uint256 _newDevPercent) public onlyOwner {
        require(
            0 <= _newDevPercent && _newDevPercent <= 1000,
            "setDevPercent: invalid percent value"
        );
        require(
            treasuryPercent + _newDevPercent + investorPercent <= 1000,
            "setDevPercent: total percent over max"
        );
        devPercent = _newDevPercent;
    }

    // Update treasury address by the previous treasury.
    function setTreasuryAddr(address _treasuryAddr) public {
        require(msg.sender == treasuryAddr, "setTreasuryAddr: wut?");
        treasuryAddr = _treasuryAddr;
    }

    function setTreasuryPercent(uint256 _newTreasuryPercent) public onlyOwner {
        require(
            0 <= _newTreasuryPercent && _newTreasuryPercent <= 1000,
            "setTreasuryPercent: invalid percent value"
        );
        require(
            devPercent + _newTreasuryPercent + investorPercent <= 1000,
            "setTreasuryPercent: total percent over max"
        );
        treasuryPercent = _newTreasuryPercent;
    }

    // Update the investor address by the previous investor.
    function setInvestorAddr(address _investorAddr) public {
        require(msg.sender == investorAddr, "setInvestorAddr: wut?");
        investorAddr = _investorAddr;
    }

    function setInvestorPercent(uint256 _newInvestorPercent) public onlyOwner {
        require(
            0 <= _newInvestorPercent && _newInvestorPercent <= 1000,
            "setInvestorPercent: invalid percent value"
        );
        require(
            devPercent + _newInvestorPercent + treasuryPercent <= 1000,
            "setInvestorPercent: total percent over max"
        );
        investorPercent = _newInvestorPercent;
    }

    // Pancake has to add hidden dummy pools inorder to alter the emission,
    // here we make it simple and transparent to all.
    function updateEmissionRate(uint256 _joePerSec) public onlyOwner {
        massUpdatePools();
        joePerSec = _joePerSec;
        emit UpdateEmissionRate(msg.sender, _joePerSec);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

// 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"
        );
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

// JoeToken with Governance.
abstract contract JoeToken is ERC20, ERC20Burnable, Ownable {
    /// @notice Total number of tokens
    uint256 public maxSupply = 100_000_000_000_000e18; 
    /// @notice Creates `_amount` token to `_to`. Must only be called by the owner (MasterJoe).
    function mint(address _to, uint256 _amount) public onlyOwner {
        require(
            totalSupply().add(_amount) <= maxSupply,
            "JOE::mint: cannot exceed max supply"
        );
        _mint(_to, _amount);
        _moveDelegates(address(0), _delegates[_to], _amount);
    }

    // Copied and modified from YAM code:
    // https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernanceStorage.sol
    // https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernance.sol
    // Which is copied and modified from COMPOUND:
    // https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/Comp.sol

    /// @notice A record of each accounts delegate
    mapping(address => address) internal _delegates;

    /// @notice A checkpoint for marking number of votes from a given block
    struct Checkpoint {
        uint32 fromBlock;
        uint256 votes;
    }

    /// @notice A record of votes checkpoints for each account, by index
    mapping(address => mapping(uint32 => Checkpoint)) public checkpoints;

    /// @notice The number of checkpoints for each account
    mapping(address => uint32) public numCheckpoints;

    /// @notice The EIP-712 typehash for the contract's domain
    bytes32 public constant DOMAIN_TYPEHASH =
        keccak256(
            "EIP712Domain(string name,uint256 chainId,address verifyingContract)"
        );

    /// @notice The EIP-712 typehash for the delegation struct used by the contract
    bytes32 public constant DELEGATION_TYPEHASH =
        keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");

    /// @notice A record of states for signing / validating signatures
    mapping(address => uint256) public nonces;

    /// @notice An event thats emitted when an account changes its delegate
    event DelegateChanged(
        address indexed delegator,
        address indexed fromDelegate,
        address indexed toDelegate
    );

    /// @notice An event thats emitted when a delegate account's vote balance changes
    event DelegateVotesChanged(
        address indexed delegate,
        uint256 previousBalance,
        uint256 newBalance
    );

    /**
     * @notice Delegate votes from `msg.sender` to `delegatee`
     * @param delegator The address to get delegatee for
     */
    function delegates(address delegator) external view returns (address) {
        return _delegates[delegator];
    }

    /**
     * @notice Delegate votes from `msg.sender` to `delegatee`
     * @param delegatee The address to delegate votes to
     */
    function delegate(address delegatee) external {
        return _delegate(msg.sender, delegatee);
    }

    /**
     * @notice Delegates votes from signatory to `delegatee`
     * @param delegatee The address to delegate votes to
     * @param nonce The contract state required to match the signature
     * @param expiry The time at which to expire the signature
     * @param v The recovery byte of the signature
     * @param r Half of the ECDSA signature pair
     * @param s Half of the ECDSA signature pair
     */
    function delegateBySig(
        address delegatee,
        uint256 nonce,
        uint256 expiry,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external {
        bytes32 domainSeparator = keccak256(
            abi.encode(
                DOMAIN_TYPEHASH,
                keccak256(bytes(name())),
                getChainId(),
                address(this)
            )
        );

        bytes32 structHash = keccak256(
            abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry)
        );

        bytes32 digest = keccak256(
            abi.encodePacked("\x19\x01", domainSeparator, structHash)
        );

        address signatory = ecrecover(digest, v, r, s);
        require(
            signatory != address(0),
            "JOE::delegateBySig: invalid signature"
        );
        require(
            nonce == nonces[signatory]++,
            "JOE::delegateBySig: invalid nonce"
        );
        require(now <= expiry, "JOE::delegateBySig: signature expired");
        return _delegate(signatory, delegatee);
    }

    /**
     * @notice Gets the current votes balance for `account`
     * @param account The address to get votes balance
     * @return The number of current votes for `account`
     */
    function getCurrentVotes(address account) external view returns (uint256) {
        uint32 nCheckpoints = numCheckpoints[account];
        return
            nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
    }

    /**
     * @notice Determine the prior number of votes for an account as of a block number
     * @dev Block number must be a finalized block or else this function will revert to prevent misinformation.
     * @param account The address of the account to check
     * @param blockNumber The block number to get the vote balance at
     * @return The number of votes the account had as of the given block
     */
    function getPriorVotes(address account, uint256 blockNumber)
        external
        view
        returns (uint256)
    {
        require(
            blockNumber < block.number,
            "JOE::getPriorVotes: not yet determined"
        );

        uint32 nCheckpoints = numCheckpoints[account];
        if (nCheckpoints == 0) {
            return 0;
        }

        // First check most recent balance
        if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
            return checkpoints[account][nCheckpoints - 1].votes;
        }

        // Next check implicit zero balance
        if (checkpoints[account][0].fromBlock > blockNumber) {
            return 0;
        }

        uint32 lower = 0;
        uint32 upper = nCheckpoints - 1;
        while (upper > lower) {
            uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
            Checkpoint memory cp = checkpoints[account][center];
            if (cp.fromBlock == blockNumber) {
                return cp.votes;
            } else if (cp.fromBlock < blockNumber) {
                lower = center;
            } else {
                upper = center - 1;
            }
        }
        return checkpoints[account][lower].votes;
    }

    function _delegate(address delegator, address delegatee) internal {
        address currentDelegate = _delegates[delegator];
        uint256 delegatorBalance = balanceOf(delegator); // balance of underlying JOEs (not scaled);
        _delegates[delegator] = delegatee;

        emit DelegateChanged(delegator, currentDelegate, delegatee);

        _moveDelegates(currentDelegate, delegatee, delegatorBalance);
    }

    function _moveDelegates(
        address srcRep,
        address dstRep,
        uint256 amount
    ) internal {
        if (srcRep != dstRep && amount > 0) {
            if (srcRep != address(0)) {
                // decrease old representative
                uint32 srcRepNum = numCheckpoints[srcRep];
                uint256 srcRepOld = srcRepNum > 0
                    ? checkpoints[srcRep][srcRepNum - 1].votes
                    : 0;
                uint256 srcRepNew = srcRepOld.sub(amount);
                _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
            }

            if (dstRep != address(0)) {
                // increase new representative
                uint32 dstRepNum = numCheckpoints[dstRep];
                uint256 dstRepOld = dstRepNum > 0
                    ? checkpoints[dstRep][dstRepNum - 1].votes
                    : 0;
                uint256 dstRepNew = dstRepOld.add(amount);
                _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
            }
        }
    }

    function _writeCheckpoint(
        address delegatee,
        uint32 nCheckpoints,
        uint256 oldVotes,
        uint256 newVotes
    ) internal {
        uint32 blockNumber = safe32(
            block.number,
            "JOE::_writeCheckpoint: block number exceeds 32 bits"
        );

        if (
            nCheckpoints > 0 &&
            checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber
        ) {
            checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
        } else {
            checkpoints[delegatee][nCheckpoints] = Checkpoint(
                blockNumber,
                newVotes
            );
            numCheckpoints[delegatee] = nCheckpoints + 1;
        }

        emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
    }

    function safe32(uint256 n, string memory errorMessage)
        internal
        pure
        returns (uint32)
    {
        require(n < 2**32, errorMessage);
        return uint32(n);
    }

    function getChainId() internal pure returns (uint256) {
        uint256 chainId;
        assembly {
            chainId := chainid()
        }
        return chainId;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../../utils/Context.sol";
import "./ERC20.sol";

/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    using SafeMath for uint256;

    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");

        _approve(account, _msgSender(), decreasedAllowance);
        _burn(account, amount);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./SmarterCoin.sol";
import "./MasterChefJoeV2.sol";
import "./libraries/BoringERC20.sol";

// MasterChefJoe is a boss. He says "go f your blocks lego boy, I'm gonna use timestamp instead".
// And to top it off, it takes no risks. Because the biggest risk is operator error.
// So we make it virtually impossible for the operator of this contract to cause a bug with people's harvests.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once JOE is sufficiently
// distributed and the community can show to govern itself.
//
// With thanks to the Lydia Finance team.
//
// Godspeed and may the 10x be with you.
contract MasterChefSmarterCoinV2 is MasterChefJoeV2 {
    constructor(
        SmarterCoin _smartcoin,
        address _devAddr,
        address _treasuryAddr,
        address _investorAddr,
        uint256 _joePerSec,
        uint256 _startTimestamp,
        uint256 _devPercent,
        uint256 _treasuryPercent,
        uint256 _investorPercent
    ) MasterChefJoeV2(
        _smartcoin,
        _devAddr,
        _treasuryAddr,
        _investorAddr,
        _joePerSec,
        _startTimestamp,
        _devPercent,
        _treasuryPercent,
        _investorPercent
    ) public {}
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

// import "@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./JoeToken.sol";

contract SmarterCoin is JoeToken {
    constructor(string memory name, string memory symbol) ERC20(name, symbol) public {}
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./JoeToken.sol";
import "./MasterChefJoe.sol";

// MasterChefJoe is a boss. He says "go f your blocks lego boy, I'm gonna use timestamp instead".
// And to top it off, it takes no risks. Because the biggest risk is operator error.
// So we make it virtually impossible for the operator of this contract to cause a bug with people's harvests.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once JOE is sufficiently
// distributed and the community can show to govern itself.
//
// With thanks to the Lydia Finance team.
//
// Godspeed and may the 10x be with you.
contract MasterChefSmarty is MasterChefJoe {
    constructor(
        JoeToken _joe,
        address _devaddr,
        address _treasuryaddr,
        uint256 _joePerSec,
        uint256 _startTimestamp,
        uint256 _devPercent,
        uint256 _treasuryPercent
    ) MasterChefJoe(
        _joe,
        _devaddr,
        _treasuryaddr,
        _joePerSec,
        _startTimestamp,
        _devPercent,
        _treasuryPercent
    ) public {}
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./JoeToken.sol";

// MasterChefJoe is a boss. He says "go f your blocks lego boy, I'm gonna use timestamp instead".
// And to top it off, it takes no risks. Because the biggest risk is operator error.
// So we make it virtually impossible for the operator of this contract to cause a bug with people's harvests.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once JOE is sufficiently
// distributed and the community can show to govern itself.
//
// With thanks to the Lydia Finance team.
//
// Godspeed and may the 10x be with you.
contract MasterChefJoe is Ownable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    // Info of each user.
    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
        //
        // We do some fancy math here. Basically, any point in time, the amount of JOEs
        // entitled to a user but is pending to be distributed is:
        //
        //   pending reward = (user.amount * pool.accJoePerShare) - user.rewardDebt
        //
        // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
        //   1. The pool's `accJoePerShare` (and `lastRewardTimestamp`) gets updated.
        //   2. User receives the pending reward sent to his/her address.
        //   3. User's `amount` gets updated.
        //   4. User's `rewardDebt` gets updated.
    }

    // Info of each pool.
    struct PoolInfo {
        IERC20 lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this pool. JOEs to distribute per second.
        uint256 lastRewardTimestamp; // Last timestamp that JOEs distribution occurs.
        uint256 accJoePerShare; // Accumulated JOEs per share, times 1e12. See below.
    }

    // The JOE TOKEN!
    JoeToken public joe;
    // Dev address.
    address public devaddr;
    // Treasury address.
    address public treasuryaddr;
    // JOE tokens created per second.
    uint256 public joePerSec;
    // Percentage of pool rewards that goto the devs.
    uint256 public devPercent; // 20%
    // Percentage of pool rewards that goes to the treasury.
    uint256 public treasuryPercent; // 20%

    // Info of each pool.
    PoolInfo[] public poolInfo;
    // Mapping to check which LP tokens have been added as pools.
    mapping(IERC20 => bool) public isPool;
    // Info of each user that stakes LP tokens.
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;
    // Total allocation points. Must be the sum of all allocation points in all pools.
    uint256 public totalAllocPoint = 0;
    // The timestamp when JOE mining starts.
    uint256 public startTimestamp;

    event Add(address indexed lpToken, uint256 allocPoint);
    event Set(uint256 indexed pid, uint256 allocPoint);
    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event EmergencyWithdraw(
        address indexed user,
        uint256 indexed pid,
        uint256 amount
    );
    event SetDevAddress(address indexed oldAddress, address indexed newAddress);
    event UpdateEmissionRate(address indexed user, uint256 _joePerSec);

    constructor(
        JoeToken _joe,
        address _devaddr,
        address _treasuryaddr,
        uint256 _joePerSec,
        uint256 _startTimestamp,
        uint256 _devPercent,
        uint256 _treasuryPercent
    ) public {
        require(
            0 <= _devPercent && _devPercent <= 1000,
            "constructor: invalid dev percent value"
        );
        require(
            0 <= _treasuryPercent && _treasuryPercent <= 1000,
            "constructor: invalid treasury percent value"
        );
        require(
            _devPercent + _treasuryPercent <= 1000,
            "constructor: total percent over max"
        );
        joe = _joe;
        devaddr = _devaddr;
        treasuryaddr = _treasuryaddr;
        joePerSec = _joePerSec;
        startTimestamp = _startTimestamp;
        devPercent = _devPercent;
        treasuryPercent = _treasuryPercent;
    }

    function poolLength() external view returns (uint256) {
        return poolInfo.length;
    }

    // Add a new lp to the pool. Can only be called by the owner.
    // XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.
    function add(uint256 _allocPoint, IERC20 _lpToken) public onlyOwner {
        require(!isPool[_lpToken], "add: LP already added");
        massUpdatePools();
        uint256 lastRewardTimestamp = block.timestamp > startTimestamp
            ? block.timestamp
            : startTimestamp;
        totalAllocPoint = totalAllocPoint.add(_allocPoint);
        poolInfo.push(
            PoolInfo({
                lpToken: _lpToken,
                allocPoint: _allocPoint,
                lastRewardTimestamp: lastRewardTimestamp,
                accJoePerShare: 0
            })
        );
        isPool[_lpToken] = true;
        emit Add(address(_lpToken), _allocPoint);
    }

    // Update the given pool's JOE allocation point. Can only be called by the owner.
    function set(uint256 _pid, uint256 _allocPoint) public onlyOwner {
        massUpdatePools();
        totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(
            _allocPoint
        );
        poolInfo[_pid].allocPoint = _allocPoint;
        emit Set(_pid, _allocPoint);
    }

    // View function to see pending JOEs on frontend.
    function pendingJoe(uint256 _pid, address _user)
        external
        view
        returns (uint256)
    {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accJoePerShare = pool.accJoePerShare;
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (block.timestamp > pool.lastRewardTimestamp && lpSupply != 0) {
            uint256 multiplier = block.timestamp.sub(pool.lastRewardTimestamp);
            uint256 joeReward = multiplier
            .mul(joePerSec)
            .mul(pool.allocPoint)
            .div(totalAllocPoint)
            .mul(1000 - devPercent - treasuryPercent)
            .div(1000);
            accJoePerShare = accJoePerShare.add(
                joeReward.mul(1e12).div(lpSupply)
            );
        }
        return user.amount.mul(accJoePerShare).div(1e12).sub(user.rewardDebt);
    }

    // Update reward variables for all pools. Be careful of gas spending!
    function massUpdatePools() public {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            updatePool(pid);
        }
    }

    // Update reward variables of the given pool to be up-to-date.
    function updatePool(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        if (block.timestamp <= pool.lastRewardTimestamp) {
            return;
        }
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (lpSupply == 0) {
            pool.lastRewardTimestamp = block.timestamp;
            return;
        }
        uint256 multiplier = block.timestamp.sub(pool.lastRewardTimestamp);
        uint256 joeReward = multiplier.mul(joePerSec).mul(pool.allocPoint).div(
            totalAllocPoint
        );
        uint256 lpPercent = 1000 - devPercent - treasuryPercent;
        joe.mint(devaddr, joeReward.mul(devPercent).div(1000));
        joe.mint(treasuryaddr, joeReward.mul(treasuryPercent).div(1000));
        joe.mint(address(this), joeReward.mul(lpPercent).div(1000));
        pool.accJoePerShare = pool.accJoePerShare.add(
            joeReward.mul(1e12).div(lpSupply).mul(lpPercent).div(1000)
        );
        pool.lastRewardTimestamp = block.timestamp;
    }

    // Deposit LP tokens to MasterChef for JOE allocation.
    function deposit(uint256 _pid, uint256 _amount) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        updatePool(_pid);
        if (user.amount > 0) {
            uint256 pending = user
            .amount
            .mul(pool.accJoePerShare)
            .div(1e12)
            .sub(user.rewardDebt);
            safeJoeTransfer(msg.sender, pending);
        }
        pool.lpToken.safeTransferFrom(
            address(msg.sender),
            address(this),
            _amount
        );
        user.amount = user.amount.add(_amount);
        user.rewardDebt = user.amount.mul(pool.accJoePerShare).div(1e12);
        emit Deposit(msg.sender, _pid, _amount);
    }

    // Withdraw LP tokens from MasterChef.
    function withdraw(uint256 _pid, uint256 _amount) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        require(user.amount >= _amount, "withdraw: not good");

        updatePool(_pid);
        uint256 pending = user.amount.mul(pool.accJoePerShare).div(1e12).sub(
            user.rewardDebt
        );
        safeJoeTransfer(msg.sender, pending);
        user.amount = user.amount.sub(_amount);
        pool.lpToken.safeTransfer(address(msg.sender), _amount);
        user.rewardDebt = user.amount.mul(pool.accJoePerShare).div(1e12);
        emit Withdraw(msg.sender, _pid, _amount);
    }

    // Withdraw without caring about rewards. EMERGENCY ONLY.
    function emergencyWithdraw(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        pool.lpToken.safeTransfer(address(msg.sender), user.amount);
        emit EmergencyWithdraw(msg.sender, _pid, user.amount);
        user.amount = 0;
        user.rewardDebt = 0;
    }

    // Safe joe transfer function, just in case if rounding error causes pool to not have enough JOEs.
    function safeJoeTransfer(address _to, uint256 _amount) internal {
        uint256 joeBal = joe.balanceOf(address(this));
        if (_amount > joeBal) {
            joe.transfer(_to, joeBal);
        } else {
            joe.transfer(_to, _amount);
        }
    }

    // Update dev address by the previous dev.
    function dev(address _devaddr) public {
        require(msg.sender == devaddr, "dev: wut?");
        devaddr = _devaddr;
        emit SetDevAddress(msg.sender, _devaddr);
    }

    function setDevPercent(uint256 _newDevPercent) public onlyOwner {
        require(
            0 <= _newDevPercent && _newDevPercent <= 1000,
            "setDevPercent: invalid percent value"
        );
        require(
            treasuryPercent + _newDevPercent <= 1000,
            "setDevPercent: total percent over max"
        );
        devPercent = _newDevPercent;
    }

    function setTreasuryPercent(uint256 _newTreasuryPercent) public onlyOwner {
        require(
            0 <= _newTreasuryPercent && _newTreasuryPercent <= 1000,
            "setTreasuryPercent: invalid percent value"
        );
        require(
            devPercent + _newTreasuryPercent <= 1000,
            "setTreasuryPercent: total percent over max"
        );
        treasuryPercent = _newTreasuryPercent;
    }

    // Pancake has to add hidden dummy pools inorder to alter the emission,
    // here we make it simple and transparent to all.
    function updateEmissionRate(uint256 _joePerSec) public onlyOwner {
        massUpdatePools();
        joePerSec = _joePerSec;
        emit UpdateEmissionRate(msg.sender, _joePerSec);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

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

// JoeBar is the coolest bar in town. You come in with some Joe, and leave with more! The longer you stay, the more Joe you get.
//
// This contract handles swapping to and from xJoe, JoeSwap's staking token.
contract JoeBar is ERC20("JoeBar", "xJOE") {
    using SafeMath for uint256;
    IERC20 public joe;

    // Define the Joe token contract
    constructor(IERC20 _joe) public {
        joe = _joe;
    }

    // Enter the bar. Pay some JOEs. Earn some shares.
    // Locks Joe and mints xJoe
    function enter(uint256 _amount) public {
        // Gets the amount of Joe locked in the contract
        uint256 totalJoe = joe.balanceOf(address(this));
        // Gets the amount of xJoe in existence
        uint256 totalShares = totalSupply();
        // If no xJoe exists, mint it 1:1 to the amount put in
        if (totalShares == 0 || totalJoe == 0) {
            _mint(msg.sender, _amount);
        }
        // Calculate and mint the amount of xJoe the Joe is worth. The ratio will change overtime, as xJoe is burned/minted and Joe deposited + gained from fees / withdrawn.
        else {
            uint256 what = _amount.mul(totalShares).div(totalJoe);
            _mint(msg.sender, what);
        }
        // Lock the Joe in the contract
        joe.transferFrom(msg.sender, address(this), _amount);
    }

    // Leave the bar. Claim back your JOEs.
    // Unlocks the staked + gained Joe and burns xJoe
    function leave(uint256 _share) public {
        // Gets the amount of xJoe in existence
        uint256 totalShares = totalSupply();
        // Calculates the amount of Joe the xJoe is worth
        uint256 what = _share.mul(joe.balanceOf(address(this))).div(
            totalShares
        );
        _burn(msg.sender, _share);
        joe.transfer(msg.sender, what);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

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

struct Rebase {
    uint128 elastic;
    uint128 base;
}

struct AccrueInfo {
    uint64 interestPerSecond;
    uint64 lastAccrued;
    uint128 feesEarnedFraction;
}

interface IKashiPair {
    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function accrue() external;

    function accrueInfo() external view returns (AccrueInfo memory info);

    function addAsset(
        address to,
        bool skim,
        uint256 share
    ) external returns (uint256 fraction);

    function addCollateral(
        address to,
        bool skim,
        uint256 share
    ) external;

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

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

    function asset() external view returns (IERC20);

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

    function bentoBox() external view returns (IBentoBox);

    function borrow(address to, uint256 amount)
        external
        returns (uint256 part, uint256 share);

    function claimOwnership() external;

    function collateral() external view returns (IERC20);

    function cook(
        uint8[] calldata actions,
        uint256[] calldata values,
        bytes[] calldata datas
    ) external payable returns (uint256 value1, uint256 value2);

    function decimals() external view returns (uint8);

    function exchangeRate() external view returns (uint256);

    function feeTo() external view returns (address);

    function getInitData(
        IERC20 collateral_,
        IERC20 asset_,
        address oracle_,
        bytes calldata oracleData_
    ) external pure returns (bytes memory data);

    function init(bytes calldata data) external payable;

    function isSolvent(address user, bool open) external view returns (bool);

    function liquidate(
        address[] calldata users,
        uint256[] calldata borrowParts,
        address to,
        address swapper,
        bool open
    ) external;

    function masterContract() external view returns (address);

    function name() external view returns (string memory);

    function nonces(address) external view returns (uint256);

    function oracle() external view returns (IOracle);

    function oracleData() external view returns (bytes memory);

    function owner() external view returns (address);

    function pendingOwner() external view returns (address);

    function permit(
        address owner_,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    function removeAsset(address to, uint256 fraction)
        external
        returns (uint256 share);

    function removeCollateral(address to, uint256 share) external;

    function repay(
        address to,
        bool skim,
        uint256 part
    ) external returns (uint256 amount);

    function setFeeTo(address newFeeTo) external;

    function setSwapper(address swapper, bool enable) external;

    function swappers(address) external view returns (bool);

    function symbol() external view returns (string memory);

    function totalAsset() external view returns (Rebase memory total);

    function totalBorrow() external view returns (Rebase memory total);

    function totalCollateralShare() external view returns (uint256);

    function totalSupply() external view returns (uint256);

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

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

    function transferOwnership(
        address newOwner,
        bool direct,
        bool renounce
    ) external;

    function updateExchangeRate() external returns (bool updated, uint256 rate);

    function userBorrowPart(address) external view returns (uint256);

    function userCollateralShare(address) external view returns (uint256);

    function withdrawFees() external;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

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

interface IBentoBox {
    event LogDeploy(
        address indexed masterContract,
        bytes data,
        address indexed cloneAddress
    );
    event LogDeposit(
        address indexed token,
        address indexed from,
        address indexed to,
        uint256 amount,
        uint256 share
    );
    event LogFlashLoan(
        address indexed borrower,
        address indexed token,
        uint256 amount,
        uint256 feeAmount,
        address indexed receiver
    );
    event LogRegisterProtocol(address indexed protocol);
    event LogSetMasterContractApproval(
        address indexed masterContract,
        address indexed user,
        bool approved
    );
    event LogStrategyDivest(address indexed token, uint256 amount);
    event LogStrategyInvest(address indexed token, uint256 amount);
    event LogStrategyLoss(address indexed token, uint256 amount);
    event LogStrategyProfit(address indexed token, uint256 amount);
    event LogStrategyQueued(address indexed token, address indexed strategy);
    event LogStrategySet(address indexed token, address indexed strategy);
    event LogStrategyTargetPercentage(
        address indexed token,
        uint256 targetPercentage
    );
    event LogTransfer(
        address indexed token,
        address indexed from,
        address indexed to,
        uint256 share
    );
    event LogWhiteListMasterContract(
        address indexed masterContract,
        bool approved
    );
    event LogWithdraw(
        address indexed token,
        address indexed from,
        address indexed to,
        uint256 amount,
        uint256 share
    );
    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    function balanceOf(IERC20, address) external view returns (uint256);

    function batch(bytes[] calldata calls, bool revertOnFail)
        external
        payable
        returns (bool[] memory successes, bytes[] memory results);

    function claimOwnership() external;

    function deploy(
        address masterContract,
        bytes calldata data,
        bool useCreate2
    ) external payable;

    function deposit(
        IERC20 token_,
        address from,
        address to,
        uint256 amount,
        uint256 share
    ) external payable returns (uint256 amountOut, uint256 shareOut);

    function harvest(
        IERC20 token,
        bool balance,
        uint256 maxChangeAmount
    ) external;

    function masterContractApproved(address, address)
        external
        view
        returns (bool);

    function masterContractOf(address) external view returns (address);

    function nonces(address) external view returns (uint256);

    function owner() external view returns (address);

    function pendingOwner() external view returns (address);

    function pendingStrategy(IERC20) external view returns (IStrategy);

    function permitToken(
        IERC20 token,
        address from,
        address to,
        uint256 amount,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    function registerProtocol() external;

    function setMasterContractApproval(
        address user,
        address masterContract,
        bool approved,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    function setStrategy(IERC20 token, IStrategy newStrategy) external;

    function setStrategyTargetPercentage(IERC20 token, uint64 targetPercentage_)
        external;

    function strategy(IERC20) external view returns (IStrategy);

    function strategyData(IERC20)
        external
        view
        returns (
            uint64 strategyStartDate,
            uint64 targetPercentage,
            uint128 balance
        );

    function toAmount(
        IERC20 token,
        uint256 share,
        bool roundUp
    ) external view returns (uint256 amount);

    function toShare(
        IERC20 token,
        uint256 amount,
        bool roundUp
    ) external view returns (uint256 share);

    function totals(IERC20)
        external
        view
        returns (uint128 elastic, uint128 base);

    function transfer(
        IERC20 token,
        address from,
        address to,
        uint256 share
    ) external;

    function transferMultiple(
        IERC20 token,
        address from,
        address[] calldata tos,
        uint256[] calldata shares
    ) external;

    function transferOwnership(
        address newOwner,
        bool direct,
        bool renounce
    ) external;

    function whitelistMasterContract(address masterContract, bool approved)
        external;

    function whitelistedMasterContracts(address) external view returns (bool);

    function withdraw(
        IERC20 token_,
        address from,
        address to,
        uint256 amount,
        uint256 share
    ) external returns (uint256 amountOut, uint256 shareOut);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

interface IOracle {
    function get(bytes calldata data)
        external
        returns (bool success, uint256 rate);

    function peek(bytes calldata data)
        external
        view
        returns (bool success, uint256 rate);

    function peekSpot(bytes calldata data) external view returns (uint256 rate);

    function symbol(bytes calldata data) external view returns (string memory);

    function name(bytes calldata data) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

interface IStrategy {
    function skim(uint256 amount) external;

    function harvest(uint256 balance, address sender)
        external
        returns (int256 amountAdded);

    function withdraw(uint256 amount) external returns (uint256 actualAmount);

    function exit(uint256 balance) external returns (int256 amountAdded);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.12;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/math/Math.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";

/**
 * @title Cliff
 * @dev A token holder contract that can release its token balance with a cliff period.
 * Optionally revocable by the owner.
 */
contract Cliff {
    using SafeERC20 for IERC20;
    using SafeMath for uint256;

    uint256 public constant SECONDS_PER_MONTH = 30 days;

    event Released(uint256 amount);

    // beneficiary of tokens after they are released
    address public immutable beneficiary;
    IERC20 public immutable token;

    uint256 public immutable cliffInMonths;
    uint256 public immutable startTimestamp;
    uint256 public released;

    /**
     * @dev Creates a cliff contract that locks its balance of any ERC20 token and
     * only allows release to the beneficiary once the cliff has passed.
     * @param _beneficiary address of the beneficiary to whom vested tokens are transferred
     * @param _cliffInMonths duration in months of the cliff in which tokens will begin to vest
     */
    constructor(
        address _token,
        address _beneficiary,
        uint256 _startTimestamp,
        uint256 _cliffInMonths
    ) public {
        require(
            _beneficiary != address(0),
            "Cliff: Beneficiary cannot be empty"
        );

        token = IERC20(_token);
        beneficiary = _beneficiary;
        cliffInMonths = _cliffInMonths;
        startTimestamp = _startTimestamp == 0
            ? blockTimestamp()
            : _startTimestamp;
    }

    /**
     * @notice Transfers vested tokens to beneficiary.
     */
    function release() external {
        uint256 vested = vestedAmount();
        require(vested > 0, "Cliff: No tokens to release");

        released = released.add(vested);
        token.safeTransfer(beneficiary, vested);

        emit Released(vested);
    }

    /**
     * @dev Calculates the amount that has already vested but hasn't been released yet.
     */
    function vestedAmount() public view returns (uint256) {
        if (blockTimestamp() < startTimestamp) {
            return 0;
        }

        uint256 elapsedTime = blockTimestamp().sub(startTimestamp);
        uint256 elapsedMonths = elapsedTime.div(SECONDS_PER_MONTH);

        if (elapsedMonths < cliffInMonths) {
            return 0;
        } else {
            return token.balanceOf(address(this));
        }
    }

    function blockTimestamp() public view virtual returns (uint256) {
        return block.timestamp;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow, so we distribute
        return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/presets/ERC20PresetMinterPauser.sol";
// import "@openzeppelin/contracts/token/ERC20/ERC20Mintable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./JoeToken.sol";

// JoeToken with Governance.
contract LP is ERC20PresetMinterPauser("El Pee", "LP") {

    // IJoeRouter02 public dexRouter;
    // address public lpPair;

    // // JOE ROUTER
    // address private _routerAddress = 0x60aE616a2155Ee3d9A68541Ba4544862310933d4;

    // bool inSwapAndLiquify;
    // bool public swapAndLiquifyEnabled = false;
    

    // constructor() {
    //     IJoeRouter02 _dexRouter = IJoeRouter02(_routerAddress);
    //     lpPair = IJoeFactory(_dexRouter.factory())
    //         .createPair(address(this), _dexRouter.WAVAX());

    //     dexRouter = _dexRouter;
    // }

    //  //to recieve ETH from dexRouter when swaping
    // receive() external payable {}

    // function swapTokensForEth(uint256 tokenAmount) private {
    //     // generate the uniswap lpPair path of token -> weth
    //     address[] memory path = new address[](2);
    //     path[0] = address(this);
    //     path[1] = dexRouter.WAVAX();

    //     _approve(address(this), address(dexRouter), tokenAmount);

    //     // make the swap
    //     dexRouter.swapExactTokensForAVAXSupportingFeeOnTransferTokens(
    //         tokenAmount,
    //         0, // accept any amount of ETH
    //         path,
    //         address(this),
    //         block.timestamp
    //     );
    // }

    // function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
    //     // approve token transfer to cover all possible scenarios
    //     _approve(address(this), address(dexRouter), tokenAmount);

    //     // add the liquidity
    //     dexRouter.addLiquidityAVAX{value: ethAmount}(
    //         address(this),
    //         tokenAmount,
    //         0, // slippage is unavoidable
    //         0, // slippage is unavoidable
    //         burnAddress,
    //         block.timestamp
    //     );
    // }
    
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../access/AccessControl.sol";
import "../utils/Context.sol";
import "../token/ERC20/ERC20.sol";
import "../token/ERC20/ERC20Burnable.sol";
import "../token/ERC20/ERC20Pausable.sol";

/**
 * @dev {ERC20} token, including:
 *
 *  - ability for holders to burn (destroy) their tokens
 *  - a minter role that allows for token minting (creation)
 *  - a pauser role that allows to stop all token transfers
 *
 * This contract uses {AccessControl} to lock permissioned functions using the
 * different roles - head to its documentation for details.
 *
 * The account that deploys the contract will be granted the minter and pauser
 * roles, as well as the default admin role, which will let it grant both minter
 * and pauser roles to other accounts.
 */
contract ERC20PresetMinterPauser is Context, AccessControl, ERC20Burnable, ERC20Pausable {
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
    bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");

    /**
     * @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE` and `PAUSER_ROLE` to the
     * account that deploys the contract.
     *
     * See {ERC20-constructor}.
     */
    constructor(string memory name, string memory symbol) public ERC20(name, symbol) {
        _setupRole(DEFAULT_ADMIN_ROLE, _msgSender());

        _setupRole(MINTER_ROLE, _msgSender());
        _setupRole(PAUSER_ROLE, _msgSender());
    }

    /**
     * @dev Creates `amount` new tokens for `to`.
     *
     * See {ERC20-_mint}.
     *
     * Requirements:
     *
     * - the caller must have the `MINTER_ROLE`.
     */
    function mint(address to, uint256 amount) public virtual {
        require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have minter role to mint");
        _mint(to, amount);
    }

    /**
     * @dev Pauses all token transfers.
     *
     * See {ERC20Pausable} and {Pausable-_pause}.
     *
     * Requirements:
     *
     * - the caller must have the `PAUSER_ROLE`.
     */
    function pause() public virtual {
        require(hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to pause");
        _pause();
    }

    /**
     * @dev Unpauses all token transfers.
     *
     * See {ERC20Pausable} and {Pausable-_unpause}.
     *
     * Requirements:
     *
     * - the caller must have the `PAUSER_ROLE`.
     */
    function unpause() public virtual {
        require(hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to unpause");
        _unpause();
    }

    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override(ERC20, ERC20Pausable) {
        super._beforeTokenTransfer(from, to, amount);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../utils/EnumerableSet.sol";
import "../utils/Address.sol";
import "../utils/Context.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it.
 */
abstract contract AccessControl is Context {
    using EnumerableSet for EnumerableSet.AddressSet;
    using Address for address;

    struct RoleData {
        EnumerableSet.AddressSet members;
        bytes32 adminRole;
    }

    mapping (bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view returns (bool) {
        return _roles[role].members.contains(account);
    }

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) public view returns (uint256) {
        return _roles[role].members.length();
    }

    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
        return _roles[role].members.at(index);
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) public virtual {
        require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");

        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) public virtual {
        require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");

        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) public virtual {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        emit RoleAdminChanged(role, _roles[role].adminRole, adminRole);
        _roles[role].adminRole = adminRole;
    }

    function _grantRole(bytes32 role, address account) private {
        if (_roles[role].members.add(account)) {
            emit RoleGranted(role, account, _msgSender());
        }
    }

    function _revokeRole(bytes32 role, address account) private {
        if (_roles[role].members.remove(account)) {
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./ERC20.sol";
import "../../utils/Pausable.sol";

/**
 * @dev ERC20 token with pausable token transfers, minting and burning.
 *
 * Useful for scenarios such as preventing trades until the end of an evaluation
 * period, or having an emergency switch for freezing all token transfers in the
 * event of a large bug.
 */
abstract contract ERC20Pausable is ERC20, Pausable {
    /**
     * @dev See {ERC20-_beforeTokenTransfer}.
     *
     * Requirements:
     *
     * - the contract must not be paused.
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
        super._beforeTokenTransfer(from, to, amount);

        require(!paused(), "ERC20Pausable: token transfer while paused");
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor () internal {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        require(!paused(), "Pausable: paused");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        require(paused(), "Pausable: not paused");
        _;
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.6.2;

import "@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol";

contract JoeHatToken is ERC20Burnable {
    /**
     * @dev Mints `initialSupply` amount of token and transfers them to `owner`.
     *
     * See {ERC20-constructor}.
     */
    constructor(address owner) public ERC20("Joe Hat Token", "HAT") {
        uint256 initialSupply = 150e18;
        _mint(owner, initialSupply);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "../libraries/BoringERC20.sol";

interface IMasterChef {
    using BoringERC20 for IERC20;
    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
    }

    struct PoolInfo {
        IERC20 lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this pool. JOE to distribute per block.
        uint256 lastRewardTimestamp; // Last block number that JOE distribution occurs.
        uint256 accJoePerShare; // Accumulated JOE per share, times 1e12. See below.
    }

    function poolInfo(uint256 pid)
        external
        view
        returns (IMasterChef.PoolInfo memory);

    function totalAllocPoint() external view returns (uint256);

    function deposit(uint256 _pid, uint256 _amount) external;
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "./interfaces/IERC20.sol";

interface IMasterChef {
    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
    }

    struct PoolInfo {
        IERC20 lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this pool. JOE to distribute per block.
        uint256 lastRewardTimestamp; // Last block number that JOE distribution occurs.
        uint256 accJoePerShare; // Accumulated JOE per share, times 1e12. See below.
    }

    function poolInfo(uint256 pid) external view returns (IMasterChef.PoolInfo memory);

    function totalAllocPoint() external view returns (uint256);

    function joePerSec() external view returns (uint256);

    function deposit(uint256 _pid, uint256 _amount) external;

    function devPercent() external view returns (uint256);

    function treasuryPercent() external view returns (uint256);

    function investorPercent() external view returns (uint256);
}

interface IRewarder {
    function onJoeReward(address user, uint256 newLpAmount) external;

    function pendingTokens(address user) external view returns (uint256 pending);

    function rewardToken() external view returns (IERC20);
}

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");
    }
}

/// @notice The (older) MasterChefJoeV2 contract gives out a constant number of JOE tokens per block.
/// It is the only address with minting rights for JOE.
/// The idea for this MasterChefJoeV3 (MCJV3) contract is therefore to be the owner of a dummy token
/// that is deposited into the MasterChefJoeV2 (MCJV2) contract.
/// The allocation point for this pool on MCJV3 is the total allocation point for all pools that receive double incentives.
contract MasterChefJoeV3 is Ownable, ReentrancyGuard {
    using SafeMath for uint256;
    using BoringERC20 for IERC20;
    using EnumerableSet for EnumerableSet.AddressSet;

    /// @notice Info of each MCJV3 user.
    /// `amount` LP token amount the user has provided.
    /// `rewardDebt` The amount of JOE entitled to the user.
    struct UserInfo {
        uint256 amount;
        uint256 rewardDebt;
    }

    /// @notice Info of each MCJV3 pool.
    /// `allocPoint` The amount of allocation points assigned to the pool.
    /// Also known as the amount of JOE to distribute per block.
    struct PoolInfo {
        IERC20 lpToken;
        uint256 accJoePerShare;
        uint256 lastRewardTimestamp;
        uint256 allocPoint;
        IRewarder rewarder;
    }

    /// @notice Address of MCJV2 contract.
    IMasterChef public immutable MASTER_CHEF_V2;
    /// @notice Address of JOE contract.
    IERC20 public immutable JOE;
    /// @notice The index of MCJV3 master pool in MCJV2
    uint256 public immutable MASTER_PID;
    /// @notice Info of each MCJV3 pool.
    PoolInfo[] public poolInfo;
    // Set of all LP tokens that have been added as pools
    EnumerableSet.AddressSet private lpTokens;
    /// @notice Info of each user that stakes LP tokens.
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;
    /// @dev Total allocation points. Must be the sum of all allocation points in all pools.
    uint256 public totalAllocPoint;
    uint256 private constant ACC_TOKEN_PRECISION = 1e18;

    event Add(uint256 indexed pid, uint256 allocPoint, IERC20 indexed lpToken, IRewarder indexed rewarder);
    event Set(uint256 indexed pid, uint256 allocPoint, IRewarder indexed rewarder, bool overwrite);
    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event UpdatePool(uint256 indexed pid, uint256 lastRewardTimestamp, uint256 lpSupply, uint256 accJoePerShare);
    event Harvest(address indexed user, uint256 indexed pid, uint256 amount);
    event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event Init();

    /// @param _MASTER_CHEF_V2 The JoeSwap MCJV2 contract address.
    /// @param _joe The JOE token contract address.
    /// @param _MASTER_PID The pool ID of the dummy token on the base MCJV2 contract.
    constructor(
        IMasterChef _MASTER_CHEF_V2,
        IERC20 _joe,
        uint256 _MASTER_PID
    ) public {
        MASTER_CHEF_V2 = _MASTER_CHEF_V2;
        JOE = _joe;
        MASTER_PID = _MASTER_PID;
    }

    /// @notice Deposits a dummy token to `MASTER_CHEF_V2` MCJV2. This is required because MCJV2 holds the minting rights for JOE.
    /// Any balance of transaction sender in `dummyToken` is transferred.
    /// The allocation point for the pool on MCJV2 is the total allocation point for all pools that receive double incentives.
    /// @param dummyToken The address of the ERC-20 token to deposit into MCJV2.
    function init(IERC20 dummyToken) external onlyOwner {
        uint256 balance = dummyToken.balanceOf(msg.sender);
        require(balance != 0, "MasterChefV2: Balance must exceed 0");
        dummyToken.safeTransferFrom(msg.sender, address(this), balance);
        dummyToken.approve(address(MASTER_CHEF_V2), balance);
        MASTER_CHEF_V2.deposit(MASTER_PID, balance);
        emit Init();
    }

    /// @notice Returns the number of MCJV3 pools.
    function poolLength() external view returns (uint256 pools) {
        pools = poolInfo.length;
    }

    /// @notice Add a new LP to the pool. Can only be called by the owner.
    /// DO NOT add the same LP token more than once. Rewards will be messed up if you do.
    /// @param allocPoint AP of the new pool.
    /// @param _lpToken Address of the LP ERC-20 token.
    /// @param _rewarder Address of the rewarder delegate.
    function add(
        uint256 allocPoint,
        IERC20 _lpToken,
        IRewarder _rewarder
    ) external onlyOwner {
        require(!lpTokens.contains(address(_lpToken)), "add: LP already added");
        // Sanity check to ensure _lpToken is an ERC20 token
        _lpToken.balanceOf(address(this));

        uint256 lastRewardTimestamp = block.timestamp;
        totalAllocPoint = totalAllocPoint.add(allocPoint);

        poolInfo.push(
            PoolInfo({
                lpToken: _lpToken,
                allocPoint: allocPoint,
                lastRewardTimestamp: lastRewardTimestamp,
                accJoePerShare: 0,
                rewarder: _rewarder
            })
        );
        lpTokens.add(address(_lpToken));
        emit Add(poolInfo.length.sub(1), allocPoint, _lpToken, _rewarder);
    }

    /// @notice Update the given pool's JOE allocation point and `IRewarder` contract. Can only be called by the owner.
    /// @param _pid The index of the pool. See `poolInfo`.
    /// @param _allocPoint New AP of the pool.
    /// @param _rewarder Address of the rewarder delegate.
    /// @param overwrite True if _rewarder should be `set`. Otherwise `_rewarder` is ignored.
    function set(
        uint256 _pid,
        uint256 _allocPoint,
        IRewarder _rewarder,
        bool overwrite
    ) external onlyOwner {
        PoolInfo memory pool = poolInfo[_pid];
        totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(_allocPoint);
        pool.allocPoint = _allocPoint;
        if (overwrite) {
            pool.rewarder = _rewarder;
        }
        poolInfo[_pid] = pool;
        emit Set(_pid, _allocPoint, overwrite ? _rewarder : pool.rewarder, overwrite);
    }

    /// @notice View function to see pending JOE on frontend.
    /// @param _pid The index of the pool. See `poolInfo`.
    /// @param _user Address of user.
    /// @return pendingJoe JOE reward for a given user.
    //          bonusTokenAddress The address of the bonus reward.
    //          bonusTokenSymbol The symbol of the bonus token.
    //          pendingBonusToken The amount of bonus rewards pending.
    function pendingTokens(uint256 _pid, address _user)
        external
        view
        returns (
            uint256 pendingJoe,
            address bonusTokenAddress,
            string memory bonusTokenSymbol,
            uint256 pendingBonusToken
        )
    {
        PoolInfo memory pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accJoePerShare = pool.accJoePerShare;
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (block.timestamp > pool.lastRewardTimestamp && lpSupply != 0) {
            uint256 secondsElapsed = block.timestamp.sub(pool.lastRewardTimestamp);
            uint256 joeReward = secondsElapsed.mul(joePerSec()).mul(pool.allocPoint).div(totalAllocPoint);
            accJoePerShare = accJoePerShare.add(joeReward.mul(ACC_TOKEN_PRECISION).div(lpSupply));
        }
        pendingJoe = user.amount.mul(accJoePerShare).div(ACC_TOKEN_PRECISION).sub(user.rewardDebt);

        // If it's a double reward farm, we return info about the bonus token
        if (address(pool.rewarder) != address(0)) {
            bonusTokenAddress = address(pool.rewarder.rewardToken());
            bonusTokenSymbol = IERC20(pool.rewarder.rewardToken()).safeSymbol();
            pendingBonusToken = pool.rewarder.pendingTokens(_user);
        }
    }

    /// @notice Update reward variables for all pools. Be careful of gas spending!
    /// @param pids Pool IDs of all to be updated. Make sure to update all active pools.
    function massUpdatePools(uint256[] calldata pids) external {
        uint256 len = pids.length;
        for (uint256 i = 0; i < len; ++i) {
            updatePool(pids[i]);
        }
    }

    /// @notice Calculates and returns the `amount` of JOE per block.
    function joePerSec() public view returns (uint256 amount) {
        uint256 total = 1000;
        uint256 lpPercent = total.sub(
            MASTER_CHEF_V2.devPercent().sub(MASTER_CHEF_V2.treasuryPercent().sub(MASTER_CHEF_V2.investorPercent()))
        );
        uint256 lpShare = MASTER_CHEF_V2.joePerSec().mul(lpPercent).div(total);
        amount = lpShare.mul(MASTER_CHEF_V2.poolInfo(MASTER_PID).allocPoint).div(MASTER_CHEF_V2.totalAllocPoint());
    }

    /// @notice Update reward variables of the given pool.
    /// @param pid The index of the pool. See `poolInfo`.
    function updatePool(uint256 pid) public {
        PoolInfo memory pool = poolInfo[pid];
        if (block.timestamp > pool.lastRewardTimestamp) {
            uint256 lpSupply = pool.lpToken.balanceOf(address(this));
            if (lpSupply > 0) {
                uint256 secondsElapsed = block.timestamp.sub(pool.lastRewardTimestamp);
                uint256 joeReward = secondsElapsed.mul(joePerSec()).mul(pool.allocPoint).div(totalAllocPoint);
                pool.accJoePerShare = pool.accJoePerShare.add((joeReward.mul(ACC_TOKEN_PRECISION).div(lpSupply)));
            }
            pool.lastRewardTimestamp = block.timestamp;
            poolInfo[pid] = pool;
            emit UpdatePool(pid, pool.lastRewardTimestamp, lpSupply, pool.accJoePerShare);
        }
    }

    /// @notice Deposit LP tokens to MCJV3 for JOE allocation.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @param amount LP token amount to deposit.
    function deposit(uint256 pid, uint256 amount) external nonReentrant {
        harvestFromMasterChef();
        updatePool(pid);
        PoolInfo memory pool = poolInfo[pid];
        UserInfo storage user = userInfo[pid][msg.sender];

        if (user.amount > 0) {
            // Harvest JOE
            uint256 pending = user.amount.mul(pool.accJoePerShare).div(ACC_TOKEN_PRECISION).sub(user.rewardDebt);
            JOE.safeTransfer(msg.sender, pending);
            emit Harvest(msg.sender, pid, pending);
        }

        uint256 balanceBefore = pool.lpToken.balanceOf(address(this));
        pool.lpToken.safeTransferFrom(msg.sender, address(this), amount);
        uint256 receivedAmount = pool.lpToken.balanceOf(address(this)).sub(balanceBefore);

        // Effects
        user.amount = user.amount.add(receivedAmount);
        user.rewardDebt = user.amount.mul(pool.accJoePerShare).div(ACC_TOKEN_PRECISION);

        // Interactions
        IRewarder _rewarder = pool.rewarder;
        if (address(_rewarder) != address(0)) {
            _rewarder.onJoeReward(msg.sender, user.amount);
        }

        emit Deposit(msg.sender, pid, amount);
    }

    /// @notice Withdraw LP tokens from MCJV3.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @param amount LP token amount to withdraw.
    function withdraw(uint256 pid, uint256 amount) external nonReentrant {
        harvestFromMasterChef();
        updatePool(pid);
        PoolInfo memory pool = poolInfo[pid];
        UserInfo storage user = userInfo[pid][msg.sender];

        if (user.amount > 0) {
            // Harvest JOE
            uint256 pending = user.amount.mul(pool.accJoePerShare).div(ACC_TOKEN_PRECISION).sub(user.rewardDebt);
            JOE.safeTransfer(msg.sender, pending);
            emit Harvest(msg.sender, pid, pending);
        }

        // Effects
        user.amount = user.amount.sub(amount);
        user.rewardDebt = user.amount.mul(pool.accJoePerShare).div(ACC_TOKEN_PRECISION);

        // Interactions
        IRewarder _rewarder = pool.rewarder;
        if (address(_rewarder) != address(0)) {
            _rewarder.onJoeReward(msg.sender, user.amount);
        }

        pool.lpToken.safeTransfer(msg.sender, amount);

        emit Withdraw(msg.sender, pid, amount);
    }

    /// @notice Harvests JOE from `MASTER_CHEF_V2` MCJV2 and pool `MASTER_PID` to this MCJV3 contract.
    function harvestFromMasterChef() public {
        MASTER_CHEF_V2.deposit(MASTER_PID, 0);
    }

    /// @notice Withdraw without caring about rewards. EMERGENCY ONLY.
    /// @param pid The index of the pool. See `poolInfo`.
    function emergencyWithdraw(uint256 pid) external nonReentrant {
        PoolInfo memory pool = poolInfo[pid];
        UserInfo storage user = userInfo[pid][msg.sender];
        uint256 amount = user.amount;
        user.amount = 0;
        user.rewardDebt = 0;

        IRewarder _rewarder = pool.rewarder;
        if (address(_rewarder) != address(0)) {
            _rewarder.onJoeReward(msg.sender, 0);
        }

        // Note: transfer can fail or succeed if `amount` is zero.
        pool.lpToken.safeTransfer(msg.sender, amount);
        emit EmergencyWithdraw(msg.sender, pid, amount);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor () internal {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "./MasterChefJoeV3.sol";

contract MasterChefSmartCoinV3 is MasterChefJoeV3 {
    constructor(
        IMasterChef _MASTER_CHEF_V2,
        IERC20 _smartcoin,
        uint256 _MASTER_PID
    ) MasterChefJoeV3(
        _MASTER_CHEF_V2,
        _smartcoin,
        _MASTER_PID
    ) public {}
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "../libraries/SafeERC20.sol";

interface IRewarder {
    using SafeERC20 for IERC20;

    function onJoeReward(address user, uint256 newLpAmount) external;

    function pendingTokens(address user)
        external
        view
        returns (uint256 pending);
}

interface IMasterChef {
    struct PoolInfo {
        uint256 allocPoint; // How many allocation points assigned to this pool. JOE to distribute per block.
    }

    function deposit(uint256 _pid, uint256 _amount) external;

    function poolInfo(uint256 pid)
        external
        view
        returns (IMasterChef.PoolInfo memory);

    function totalAllocPoint() external view returns (uint256);
}

interface IMasterChefJoeV2 {
    using SafeERC20 for IERC20;

    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
    }

    struct PoolInfo {
        IERC20 lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this poolInfo. SUSHI to distribute per block.
        uint256 lastRewardTimestamp; // Last block.timestamp that SUSHI distribution occurs.
        uint256 accJoePerShare; // Accumulated SUSHI per share, times 1e12. See below.
    }

    function poolInfo(uint256 pid) external view returns (PoolInfo memory);

    function totalAllocPoint() external view returns (uint256);

    function deposit(uint256 _pid, uint256 _amount) external;
}

/**
 * This is a sample contract to be used in the MasterChefJoeV2 contract for partners to reward
 * stakers with their native token alongside JOE.
 *
 * It assumes the project already has an existing MasterChef-style farm contract.
 * In which case, the init() function is called to deposit a dummy token into one
 * of the MasterChef farms so this contract can accrue rewards from that farm.
 * The contract then transfers the reward token to the user on each call to
 * onJoeReward().
 *
 */
contract MasterChefRewarderPerSec is IRewarder, Ownable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    IERC20 public immutable rewardToken;
    IERC20 public immutable lpToken;
    uint256 public immutable MCV1_pid;
    IMasterChef public immutable MCV1;
    IMasterChefJoeV2 public immutable MCV2;

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

    /// @notice Info of each MCV2 poolInfo.
    /// `accTokenPerShare` Amount of JOE each LP token is worth.
    /// `lastRewardTimestamp` The last time JOE was rewarded to the poolInfo.
    struct PoolInfo {
        uint256 accTokenPerShare;
        uint256 lastRewardTimestamp;
        uint256 allocPoint;
    }

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

    uint256 public tokenPerSec;
    uint256 private constant ACC_TOKEN_PRECISION = 1e12;

    event OnReward(address indexed user, uint256 amount);
    event RewardRateUpdated(uint256 oldRate, uint256 newRate);
    event AllocPointUpdated(uint256 oldAllocPoint, uint256 newAllocPoint);

    modifier onlyMCV2 {
        require(
            msg.sender == address(MCV2),
            "onlyMCV2: only MasterChef V2 can call this function"
        );
        _;
    }

    constructor(
        IERC20 _rewardToken,
        IERC20 _lpToken,
        uint256 _tokenPerSec,
        uint256 _allocPoint,
        uint256 _MCV1_pid,
        IMasterChef _MCV1,
        IMasterChefJoeV2 _MCV2
    ) public {
        require(
            Address.isContract(address(_rewardToken)),
            "constructor: reward token must be a valid contract"
        );
        require(
            Address.isContract(address(_lpToken)),
            "constructor: LP token must be a valid contract"
        );
        require(
            Address.isContract(address(_MCV1)),
            "constructor: MasterChef must be a valid contract"
        );
        require(
            Address.isContract(address(_MCV2)),
            "constructor: MasterChefJoeV2 must be a valid contract"
        );

        rewardToken = _rewardToken;
        lpToken = _lpToken;
        tokenPerSec = _tokenPerSec;
        MCV1_pid = _MCV1_pid;
        MCV1 = _MCV1;
        MCV2 = _MCV2;
        poolInfo = PoolInfo({
            lastRewardTimestamp: block.timestamp,
            accTokenPerShare: 0,
            allocPoint: _allocPoint
        });
    }

    /// @notice Deposits a dummy token to a MaterChefV1 farm so that this contract can claim reward tokens.
    /// @param dummyToken The address of the dummy ERC20 token to deposit into MCV1.
    function init(IERC20 dummyToken) external {
        uint256 balance = dummyToken.balanceOf(msg.sender);
        require(balance > 0, "init: Balance must exceed 0");
        dummyToken.safeTransferFrom(msg.sender, balance);
        dummyToken.approve(address(MCV1), balance);
        MCV1.deposit(MCV1_pid, balance);
    }

    /// @notice Update reward variables of the given poolInfo.
    /// @return pool Returns the pool that was updated.
    function updatePool() public returns (PoolInfo memory pool) {
        pool = poolInfo;

        if (block.timestamp > pool.lastRewardTimestamp) {
            uint256 lpSupply = lpToken.balanceOf(address(MCV2));

            if (lpSupply > 0) {
                uint256 timeElapsed = block.timestamp.sub(
                    pool.lastRewardTimestamp
                );
                uint256 tokenReward = timeElapsed
                .mul(tokenPerSec)
                .mul(pool.allocPoint)
                .div(MCV1.totalAllocPoint());
                pool.accTokenPerShare = pool.accTokenPerShare.add(
                    (tokenReward.mul(ACC_TOKEN_PRECISION) / lpSupply)
                );
            }

            pool.lastRewardTimestamp = block.timestamp;
            poolInfo = pool;
        }
    }

    /// @notice Sets the distribution reward rate. This will also update the poolInfo.
    /// @param _tokenPerSec The number of tokens to distribute per block
    function setRewardRate(uint256 _tokenPerSec) external onlyOwner {
        updatePool();

        uint256 oldRate = tokenPerSec;
        tokenPerSec = _tokenPerSec;

        emit RewardRateUpdated(oldRate, _tokenPerSec);
    }

    /// @notice Sets the allocation point. THis will also update the poolInfo.
    /// @param _allocPoint The new allocation point of the pool
    function setAllocPoint(uint256 _allocPoint) external onlyOwner {
        updatePool();

        uint256 oldAllocPoint = poolInfo.allocPoint;
        poolInfo.allocPoint = _allocPoint;

        emit AllocPointUpdated(oldAllocPoint, _allocPoint);
    }

    /// @notice Claims reward tokens from MCV1 farm.
    function harvestFromMasterChefV1() public {
        MCV1.deposit(MCV1_pid, 0);
    }

    /// @notice Function called by MasterChefJoeV2 whenever staker claims JOE harvest. Allows staker to also receive a 2nd reward token.
    /// @param _user Address of user
    /// @param _lpAmount Number of LP tokens the user has
    function onJoeReward(address _user, uint256 _lpAmount)
        external
        override
        onlyMCV2
    {
        updatePool();
        PoolInfo memory pool = poolInfo;
        UserInfo storage user = userInfo[_user];
        uint256 pendingBal;
        // if user had deposited
        if (user.amount > 0) {
            harvestFromMasterChefV1();
            pendingBal = (user.amount.mul(pool.accTokenPerShare) /
                ACC_TOKEN_PRECISION)
            .sub(user.rewardDebt);
            uint256 rewardBal = rewardToken.balanceOf(address(this));
            if (pendingBal > rewardBal) {
                rewardToken.safeTransfer(_user, rewardBal);
            } else {
                rewardToken.safeTransfer(_user, pendingBal);
            }
        }

        user.amount = _lpAmount;
        user.rewardDebt =
            user.amount.mul(pool.accTokenPerShare) /
            ACC_TOKEN_PRECISION;

        emit OnReward(_user, pendingBal);
    }

    /// @notice View function to see pending tokens
    /// @param _user Address of user.
    /// @return pending reward for a given user.
    function pendingTokens(address _user)
        external
        view
        override
        returns (uint256 pending)
    {
        PoolInfo memory pool = poolInfo;
        UserInfo storage user = userInfo[_user];

        uint256 accTokenPerShare = pool.accTokenPerShare;
        uint256 lpSupply = lpToken.balanceOf(address(MCV2));

        if (block.timestamp > pool.lastRewardTimestamp && lpSupply != 0) {
            uint256 blocks = block.timestamp.sub(pool.lastRewardTimestamp);
            uint256 tokenReward = blocks
            .mul(tokenPerSec)
            .mul(pool.allocPoint)
            .div(MCV1.totalAllocPoint());
            accTokenPerShare = accTokenPerShare.add(
                tokenReward.mul(ACC_TOKEN_PRECISION) / lpSupply
            );
        }

        pending = (user.amount.mul(accTokenPerShare) / ACC_TOKEN_PRECISION).sub(
            user.rewardDebt
        );
    }
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "../libraries/SafeERC20.sol";
import "../interfaces/IRewarder.sol";


interface IMasterChef {
    struct PoolInfo {
        uint256 allocPoint; // How many allocation points assigned to this pool. JOE to distribute per block.
    }

    function deposit(uint256 _pid, uint256 _amount) external;

    function poolInfo(uint256 pid)
        external
        view
        returns (IMasterChef.PoolInfo memory);

    function totalAllocPoint() external view returns (uint256);
}

interface IMasterChefJoeV2 {
    using SafeERC20 for IERC20;

    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
    }

    struct PoolInfo {
        IERC20 lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this poolInfo. SUSHI to distribute per block.
        uint256 lastRewardTimestamp; // Last block number that SUSHI distribution occurs.
        uint256 accJoePerShare; // Accumulated SUSHI per share, times 1e12. See below.
    }

    function poolInfo(uint256 pid) external view returns (PoolInfo memory);

    function totalAllocPoint() external view returns (uint256);

    function deposit(uint256 _pid, uint256 _amount) external;
}

/**
 * This is a sample contract to be used in the MasterChefJoeV2 contract for partners to reward
 * stakers with their native token alongside JOE.
 *
 * It assumes the project already has an existing MasterChef-style farm contract.
 * In which case, the init() function is called to deposit a dummy token into one
 * of the MasterChef farms so this contract can accrue rewards from that farm.
 * The contract then transfers the reward token to the user on each call to
 * onJoeReward().
 *
 */
contract MasterChefRewarderPerBlock is IRewarder, Ownable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    IERC20 public immutable override rewardToken;
    IERC20 public immutable lpToken;
    uint256 public immutable MCV1_pid;
    IMasterChef public immutable MCV1;
    IMasterChefJoeV2 public immutable MCV2;

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

    /// @notice Info of each MCV2 poolInfo.
    /// `accTokenPerShare` Amount of JOE each LP token is worth.
    /// `lastRewardBlock` The last block JOE was rewarded to the poolInfo.
    struct PoolInfo {
        uint256 accTokenPerShare;
        uint256 lastRewardBlock;
        uint256 allocPoint;
    }

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

    uint256 public tokenPerBlock;
    uint256 private constant ACC_TOKEN_PRECISION = 1e12;

    event OnReward(address indexed user, uint256 amount);
    event RewardRateUpdated(uint256 oldRate, uint256 newRate);
    event AllocPointUpdated(uint256 oldAllocPoint, uint256 newAllocPoint);

    modifier onlyMCV2 {
        require(
            msg.sender == address(MCV2),
            "onlyMCV2: only MasterChef V2 can call this function"
        );
        _;
    }

    constructor(
        IERC20 _rewardToken,
        IERC20 _lpToken,
        uint256 _tokenPerBlock,
        uint256 _allocPoint,
        uint256 _MCV1_pid,
        IMasterChef _MCV1,
        IMasterChefJoeV2 _MCV2
    ) public {
        require(
            Address.isContract(address(_rewardToken)),
            "constructor: reward token must be a valid contract"
        );
        require(
            Address.isContract(address(_lpToken)),
            "constructor: LP token must be a valid contract"
        );
        require(
            Address.isContract(address(_MCV1)),
            "constructor: MasterChef must be a valid contract"
        );
        require(
            Address.isContract(address(_MCV2)),
            "constructor: MasterChefJoeV2 must be a valid contract"
        );

        rewardToken = _rewardToken;
        lpToken = _lpToken;
        tokenPerBlock = _tokenPerBlock;
        MCV1_pid = _MCV1_pid;
        MCV1 = _MCV1;
        MCV2 = _MCV2;
        poolInfo = PoolInfo({
            lastRewardBlock: block.number,
            accTokenPerShare: 0,
            allocPoint: _allocPoint
        });
    }

    /// @notice Deposits a dummy token to a MaterChefV1 farm so that this contract can claim reward tokens.
    /// @param dummyToken The address of the dummy ERC20 token to deposit into MCV1.
    function init(IERC20 dummyToken) external {
        uint256 balance = dummyToken.balanceOf(msg.sender);
        require(balance > 0, "init: Balance must exceed 0");
        dummyToken.safeTransferFrom(msg.sender, balance);
        dummyToken.approve(address(MCV1), balance);
        MCV1.deposit(MCV1_pid, balance);
    }

    /// @notice Update reward variables of the given poolInfo.
    /// @return pool Returns the pool that was updated.
    function updatePool() public returns (PoolInfo memory pool) {
        pool = poolInfo;

        if (block.number > pool.lastRewardBlock) {
            uint256 lpSupply = lpToken.balanceOf(address(MCV2));

            if (lpSupply > 0) {
                uint256 blocks = block.number.sub(pool.lastRewardBlock);
                uint256 tokenReward = blocks
                .mul(tokenPerBlock)
                .mul(pool.allocPoint)
                .div(MCV1.totalAllocPoint());
                pool.accTokenPerShare = pool.accTokenPerShare.add(
                    (tokenReward.mul(ACC_TOKEN_PRECISION) / lpSupply)
                );
            }

            pool.lastRewardBlock = block.number;
            poolInfo = pool;
        }
    }

    /// @notice Sets the distribution reward rate. This will also update the poolInfo.
    /// @param _tokenPerBlock The number of tokens to distribute per block
    function setRewardRate(uint256 _tokenPerBlock) external onlyOwner {
        updatePool();

        uint256 oldRate = tokenPerBlock;
        tokenPerBlock = _tokenPerBlock;

        emit RewardRateUpdated(oldRate, _tokenPerBlock);
    }

    /// @notice Sets the allocation point. THis will also update the poolInfo.
    /// @param _allocPoint The new allocation point of the pool
    function setAllocPoint(uint256 _allocPoint) external onlyOwner {
        updatePool();

        uint256 oldAllocPoint = poolInfo.allocPoint;
        poolInfo.allocPoint = _allocPoint;

        emit AllocPointUpdated(oldAllocPoint, _allocPoint);
    }

    /// @notice Claims reward tokens from MCV1 farm.
    function harvestFromMasterChefV1() public {
        MCV1.deposit(MCV1_pid, 0);
    }

    /// @notice Function called by MasterChefJoeV2 whenever staker claims JOE harvest. Allows staker to also receive a 2nd reward token.
    /// @param _user Address of user
    /// @param _lpAmount Number of LP tokens the user has
    function onJoeReward(address _user, uint256 _lpAmount)
        external
        override
        onlyMCV2
    {
        updatePool();
        PoolInfo memory pool = poolInfo;
        UserInfo storage user = userInfo[_user];
        uint256 pendingBal;
        // if user had deposited
        if (user.amount > 0) {
            harvestFromMasterChefV1();
            pendingBal = (user.amount.mul(pool.accTokenPerShare) /
                ACC_TOKEN_PRECISION)
            .sub(user.rewardDebt);
            uint256 rewardBal = rewardToken.balanceOf(address(this));
            if (pendingBal > rewardBal) {
                rewardToken.safeTransfer(_user, rewardBal);
            } else {
                rewardToken.safeTransfer(_user, pendingBal);
            }
        }

        user.amount = _lpAmount;
        user.rewardDebt =
            user.amount.mul(pool.accTokenPerShare) /
            ACC_TOKEN_PRECISION;

        emit OnReward(_user, pendingBal);
    }

    /// @notice View function to see pending tokens
    /// @param _user Address of user.
    /// @return pending reward for a given user.
    function pendingTokens(address _user)
        external
        view
        override
        returns (uint256 pending)
    {
        PoolInfo memory pool = poolInfo;
        UserInfo storage user = userInfo[_user];

        uint256 accTokenPerShare = pool.accTokenPerShare;
        uint256 lpSupply = lpToken.balanceOf(address(MCV2));

        if (block.number > pool.lastRewardBlock && lpSupply != 0) {
            uint256 blocks = block.number.sub(pool.lastRewardBlock);
            uint256 tokenReward = blocks
            .mul(tokenPerBlock)
            .mul(pool.allocPoint)
            .div(MCV1.totalAllocPoint());
            accTokenPerShare = accTokenPerShare.add(
                tokenReward.mul(ACC_TOKEN_PRECISION) / lpSupply
            );
        }

        pending = (user.amount.mul(accTokenPerShare) / ACC_TOKEN_PRECISION).sub(
            user.rewardDebt
        );
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;
import "../libraries/SafeERC20.sol";

interface IRewarder {
    using SafeERC20 for IERC20;

    function onJoeReward(address user, uint256 newLpAmount) external;

    function pendingTokens(address user)
        external
        view
        returns (uint256 pending);

    function rewardToken() external view returns (IERC20);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract ERC20Mock is ERC20, Ownable {
    constructor(
        string memory name,
        string memory symbol,
        uint256 supply
    ) public ERC20(name, symbol) {
        _mint(msg.sender, supply);
    }
}

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

import "@openzeppelin/contracts/payment/PaymentSplitter.sol";

// abstract contract Splitter is PaymentSplitter {
//     //["0x3D97c3C7986Bd9eB24C37066E650cC7563184199","0x67e45FE748d5B76ED59E6400842170DE78318C80"],[1,1]
//     // function constructor(payees, shares) {
//     // }
//         function child(bytes32 _name) parent(_name) {}

//     constructor(payees, shares) {
//         return super.constructor(payees, shares)
//     }

//     function fallback() {
//         return super.fallback()

//     }

//     function totalShares() {
//         return super.totalShares()

//     }

//     function totalReleased() {
//         return super.totalReleased()

//     }

//     function shares(account) {
//         return super.shares(account)

//     }

//     function released(account) {
//         return super.released(account)
//     }

//     function payee(index) {
//         return super.payee(index)
//     }

//     function release(account) {
//         return super.release(account)
//     }

    
// }

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../utils/Context.sol";
import "../math/SafeMath.sol";
import "../utils/Address.sol";

/**
 * @title PaymentSplitter
 * @dev This contract allows to split Ether payments among a group of accounts. The sender does not need to be aware
 * that the Ether will be split in this way, since it is handled transparently by the contract.
 *
 * The split can be in equal parts or in any other arbitrary proportion. The way this is specified is by assigning each
 * account to a number of shares. Of all the Ether that this contract receives, each account will then be able to claim
 * an amount proportional to the percentage of total shares they were assigned.
 *
 * `PaymentSplitter` follows a _pull payment_ model. This means that payments are not automatically forwarded to the
 * accounts but kept in this contract, and the actual transfer is triggered as a separate step by calling the {release}
 * function.
 */
contract PaymentSplitter is Context {
    using SafeMath for uint256;

    event PayeeAdded(address account, uint256 shares);
    event PaymentReleased(address to, uint256 amount);
    event PaymentReceived(address from, uint256 amount);

    uint256 private _totalShares;
    uint256 private _totalReleased;

    mapping(address => uint256) private _shares;
    mapping(address => uint256) private _released;
    address[] private _payees;

    /**
     * @dev Creates an instance of `PaymentSplitter` where each account in `payees` is assigned the number of shares at
     * the matching position in the `shares` array.
     *
     * All addresses in `payees` must be non-zero. Both arrays must have the same non-zero length, and there must be no
     * duplicates in `payees`.
     */
    constructor (address[] memory payees, uint256[] memory shares_) public payable {
        // solhint-disable-next-line max-line-length
        require(payees.length == shares_.length, "PaymentSplitter: payees and shares length mismatch");
        require(payees.length > 0, "PaymentSplitter: no payees");

        for (uint256 i = 0; i < payees.length; i++) {
            _addPayee(payees[i], shares_[i]);
        }
    }

    /**
     * @dev The Ether received will be logged with {PaymentReceived} events. Note that these events are not fully
     * reliable: it's possible for a contract to receive Ether without triggering this function. This only affects the
     * reliability of the events, and not the actual splitting of Ether.
     *
     * To learn more about this see the Solidity documentation for
     * https://solidity.readthedocs.io/en/latest/contracts.html#fallback-function[fallback
     * functions].
     */
    receive () external payable virtual {
        emit PaymentReceived(_msgSender(), msg.value);
    }

    /**
     * @dev Getter for the total shares held by payees.
     */
    function totalShares() public view returns (uint256) {
        return _totalShares;
    }

    /**
     * @dev Getter for the total amount of Ether already released.
     */
    function totalReleased() public view returns (uint256) {
        return _totalReleased;
    }

    /**
     * @dev Getter for the amount of shares held by an account.
     */
    function shares(address account) public view returns (uint256) {
        return _shares[account];
    }

    /**
     * @dev Getter for the amount of Ether already released to a payee.
     */
    function released(address account) public view returns (uint256) {
        return _released[account];
    }

    /**
     * @dev Getter for the address of the payee number `index`.
     */
    function payee(uint256 index) public view returns (address) {
        return _payees[index];
    }

    /**
     * @dev Triggers a transfer to `account` of the amount of Ether they are owed, according to their percentage of the
     * total shares and their previous withdrawals.
     */
    function release(address payable account) public virtual {
        require(_shares[account] > 0, "PaymentSplitter: account has no shares");

        uint256 totalReceived = address(this).balance.add(_totalReleased);
        uint256 payment = totalReceived.mul(_shares[account]).div(_totalShares).sub(_released[account]);

        require(payment != 0, "PaymentSplitter: account is not due payment");

        _released[account] = _released[account].add(payment);
        _totalReleased = _totalReleased.add(payment);

        Address.sendValue(account, payment);
        emit PaymentReleased(account, payment);
    }

    /**
     * @dev Add a new payee to the contract.
     * @param account The address of the payee to add.
     * @param shares_ The number of shares owned by the payee.
     */
    function _addPayee(address account, uint256 shares_) private {
        require(account != address(0), "PaymentSplitter: account is the zero address");
        require(shares_ > 0, "PaymentSplitter: shares are 0");
        require(_shares[account] == 0, "PaymentSplitter: account already has shares");

        _payees.push(account);
        _shares[account] = shares_;
        _totalShares = _totalShares.add(shares_);
        emit PayeeAdded(account, shares_);
    }
}

// SPDX-License-Identifier: MIT

// COPIED FROM https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/GovernorAlpha.sol
// Copyright 2020 Compound Labs, Inc.
// Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
// 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Ctrl+f for XXX to see all the modifications.

// XXX: pragma solidity ^0.5.16;
pragma solidity 0.6.12;

// XXX: import "./SafeMath.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";

contract Timelock {
    using SafeMath for uint256;

    event NewAdmin(address indexed newAdmin);
    event NewPendingAdmin(address indexed newPendingAdmin);
    event NewDelay(uint256 indexed newDelay);
    event CancelTransaction(
        bytes32 indexed txHash,
        address indexed target,
        uint256 value,
        string signature,
        bytes data,
        uint256 eta
    );
    event ExecuteTransaction(
        bytes32 indexed txHash,
        address indexed target,
        uint256 value,
        string signature,
        bytes data,
        uint256 eta
    );
    event QueueTransaction(
        bytes32 indexed txHash,
        address indexed target,
        uint256 value,
        string signature,
        bytes data,
        uint256 eta
    );

    uint256 public constant GRACE_PERIOD = 14 days;
    uint256 public constant MINIMUM_DELAY = 2 days;
    uint256 public constant MAXIMUM_DELAY = 30 days;

    address public admin;
    address public pendingAdmin;
    uint256 public delay;
    bool public admin_initialized;

    mapping(bytes32 => bool) public queuedTransactions;

    constructor(address admin_, uint256 delay_) public {
        require(
            delay_ >= MINIMUM_DELAY,
            "Timelock::constructor: Delay must exceed minimum delay."
        );
        require(
            delay_ <= MAXIMUM_DELAY,
            "Timelock::constructor: Delay must not exceed maximum delay."
        );

        admin = admin_;
        delay = delay_;
        admin_initialized = false;
    }

    // XXX: function() external payable { }
    receive() external payable {}

    function setDelay(uint256 delay_) public {
        require(
            msg.sender == address(this),
            "Timelock::setDelay: Call must come from Timelock."
        );
        require(
            delay_ >= MINIMUM_DELAY,
            "Timelock::setDelay: Delay must exceed minimum delay."
        );
        require(
            delay_ <= MAXIMUM_DELAY,
            "Timelock::setDelay: Delay must not exceed maximum delay."
        );
        delay = delay_;

        emit NewDelay(delay);
    }

    function acceptAdmin() public {
        require(
            msg.sender == pendingAdmin,
            "Timelock::acceptAdmin: Call must come from pendingAdmin."
        );
        admin = msg.sender;
        pendingAdmin = address(0);

        emit NewAdmin(admin);
    }

    function setPendingAdmin(address pendingAdmin_) public {
        // allows one time setting of admin for deployment purposes
        if (admin_initialized) {
            require(
                msg.sender == address(this),
                "Timelock::setPendingAdmin: Call must come from Timelock."
            );
        } else {
            require(
                msg.sender == admin,
                "Timelock::setPendingAdmin: First call must come from admin."
            );
            admin_initialized = true;
        }
        pendingAdmin = pendingAdmin_;

        emit NewPendingAdmin(pendingAdmin);
    }

    function queueTransaction(
        address target,
        uint256 value,
        string memory signature,
        bytes memory data,
        uint256 eta
    ) public returns (bytes32) {
        require(
            msg.sender == admin,
            "Timelock::queueTransaction: Call must come from admin."
        );
        require(
            eta >= getBlockTimestamp().add(delay),
            "Timelock::queueTransaction: Estimated execution block must satisfy delay."
        );

        bytes32 txHash = keccak256(
            abi.encode(target, value, signature, data, eta)
        );
        queuedTransactions[txHash] = true;

        emit QueueTransaction(txHash, target, value, signature, data, eta);
        return txHash;
    }

    function cancelTransaction(
        address target,
        uint256 value,
        string memory signature,
        bytes memory data,
        uint256 eta
    ) public {
        require(
            msg.sender == admin,
            "Timelock::cancelTransaction: Call must come from admin."
        );

        bytes32 txHash = keccak256(
            abi.encode(target, value, signature, data, eta)
        );
        queuedTransactions[txHash] = false;

        emit CancelTransaction(txHash, target, value, signature, data, eta);
    }

    function executeTransaction(
        address target,
        uint256 value,
        string memory signature,
        bytes memory data,
        uint256 eta
    ) public payable returns (bytes memory) {
        require(
            msg.sender == admin,
            "Timelock::executeTransaction: Call must come from admin."
        );

        bytes32 txHash = keccak256(
            abi.encode(target, value, signature, data, eta)
        );
        require(
            queuedTransactions[txHash],
            "Timelock::executeTransaction: Transaction hasn't been queued."
        );
        require(
            getBlockTimestamp() >= eta,
            "Timelock::executeTransaction: Transaction hasn't surpassed time lock."
        );
        require(
            getBlockTimestamp() <= eta.add(GRACE_PERIOD),
            "Timelock::executeTransaction: Transaction is stale."
        );

        queuedTransactions[txHash] = false;

        bytes memory callData;

        if (bytes(signature).length == 0) {
            callData = data;
        } else {
            callData = abi.encodePacked(
                bytes4(keccak256(bytes(signature))),
                data
            );
        }

        // solium-disable-next-line security/no-call-value
        (bool success, bytes memory returnData) = target.call.value(value)(
            callData
        );
        require(
            success,
            "Timelock::executeTransaction: Transaction execution reverted."
        );

        emit ExecuteTransaction(txHash, target, value, signature, data, eta);

        return returnData;
    }

    function getBlockTimestamp() internal view returns (uint256) {
        // solium-disable-next-line security/no-block-members
        return block.timestamp;
    }
}

// SPDX-License-Identifier: MIT

// COPIED FROM https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/GovernorAlpha.sol
// Copyright 2020 Compound Labs, Inc.
// Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
// 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Ctrl+f for XXX to see all the modifications.

// XXX: pragma solidity ^0.5.16;
pragma solidity 0.6.12;

// XXX: import "./SafeMath.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";

contract CustomMasterChefJoeV2Timelock {
    using SafeMath for uint256;

    event NewAdmin(address indexed newAdmin);
    event NewPendingAdmin(address indexed newPendingAdmin);
    event NewDelay(uint256 indexed newDelay);
    event CancelTransaction(
        bytes32 indexed txHash,
        address indexed target,
        uint256 value,
        string signature,
        bytes data,
        uint256 eta
    );
    event ExecuteTransaction(
        bytes32 indexed txHash,
        address indexed target,
        uint256 value,
        string signature,
        bytes data,
        uint256 eta
    );
    event QueueTransaction(
        bytes32 indexed txHash,
        address indexed target,
        uint256 value,
        string signature,
        bytes data,
        uint256 eta
    );

    uint256 public constant GRACE_PERIOD = 14 days;
    uint256 public constant MINIMUM_DELAY = 1 days;
    uint256 public constant MAXIMUM_DELAY = 30 days;

    string private constant SET_DEV_PERCENT_SIG = "setDevPercent(uint256)";
    string private constant SET_TREASURY_PERCENT_SIG =
        "setTreasuryPercent(uint256)";
    string private constant SET_INVESTOR_PERCENT_SIG =
        "setInvestorPercent(uint256)";
    string private constant UPDATE_EMISSION_RATE_SIG =
        "updateEmissionRate(uint256)";

    address public admin;
    address public pendingAdmin;
    uint256 public delay;
    uint256 public devPercentLimit;
    uint256 public investorPercentLimit;
    uint256 public treasuryPercentLimit;
    uint256 public joePerSecLimit;
    bool public admin_initialized;

    mapping(bytes32 => bool) public queuedTransactions;

    modifier withinLimits(string memory signature, bytes memory data) {
        if (
            keccak256(bytes(signature)) == keccak256(bytes(SET_DEV_PERCENT_SIG))
        ) {
            uint256 devPercent = abi.decode(data, (uint256));
            require(
                devPercent <= devPercentLimit,
                "CustomMasterChefJoeV2Timelock::withinLimits: devPercent must not exceed limit."
            );
        } else if (
            keccak256(bytes(signature)) ==
            keccak256(bytes(SET_TREASURY_PERCENT_SIG))
        ) {
            uint256 treasuryPercent = abi.decode(data, (uint256));
            require(
                treasuryPercent <= treasuryPercentLimit,
                "CustomMasterChefJoeV2Timelock::withinLimits: treasuryPercent must not exceed limit."
            );
        } else if (
            keccak256(bytes(signature)) ==
            keccak256(bytes(SET_INVESTOR_PERCENT_SIG))
        ) {
            uint256 investorPercent = abi.decode(data, (uint256));
            require(
                investorPercent <= investorPercentLimit,
                "CustomMasterChefJoeV2Timelock::withinLimits: investorPercent must not exceed limit."
            );
        } else if (
            keccak256(bytes(signature)) ==
            keccak256(bytes(UPDATE_EMISSION_RATE_SIG))
        ) {
            uint256 joePerSec = abi.decode(data, (uint256));
            require(
                joePerSec <= joePerSecLimit,
                "CustomMasterChefJoeV2Timelock::withinLimits: joePerSec must not exceed limit."
            );
        }
        _;
    }

    constructor(
        address admin_,
        uint256 delay_,
        uint256 devPercentLimit_,
        uint256 treasuryPercentLimit_,
        uint256 investorPercentLimit_,
        uint256 joePerSecLimit_
    ) public {
        require(
            delay_ >= MINIMUM_DELAY,
            "CustomMasterChefJoeV2Timelock::constructor: Delay must exceed minimum delay."
        );
        require(
            delay_ <= MAXIMUM_DELAY,
            "CustomMasterChefJoeV2Timelock::constructor: Delay must not exceed maximum delay."
        );

        admin = admin_;
        delay = delay_;
        admin_initialized = false;
        devPercentLimit = devPercentLimit_;
        treasuryPercentLimit = treasuryPercentLimit_;
        investorPercentLimit = investorPercentLimit_;
        joePerSecLimit = joePerSecLimit_;
    }

    // XXX: function() external payable { }
    receive() external payable {}

    function setDelay(uint256 delay_) public {
        require(
            msg.sender == address(this),
            "CustomMasterChefJoeV2Timelock::setDelay: Call must come from CustomMasterChefJoeV2Timelock."
        );
        require(
            delay_ >= MINIMUM_DELAY,
            "CustomMasterChefJoeV2Timelock::setDelay: Delay must exceed minimum delay."
        );
        require(
            delay_ <= MAXIMUM_DELAY,
            "CustomMasterChefJoeV2Timelock::setDelay: Delay must not exceed maximum delay."
        );
        delay = delay_;

        emit NewDelay(delay);
    }

    function acceptAdmin() public {
        require(
            msg.sender == pendingAdmin,
            "CustomMasterChefJoeV2Timelock::acceptAdmin: Call must come from pendingAdmin."
        );
        admin = msg.sender;
        pendingAdmin = address(0);

        emit NewAdmin(admin);
    }

    function setPendingAdmin(address pendingAdmin_) public {
        // allows one time setting of admin for deployment purposes
        if (admin_initialized) {
            require(
                msg.sender == address(this),
                "CustomMasterChefJoeV2Timelock::setPendingAdmin: Call must come from CustomMasterChefJoeV2Timelock."
            );
        } else {
            require(
                msg.sender == admin,
                "CustomMasterChefJoeV2Timelock::setPendingAdmin: First call must come from admin."
            );
            admin_initialized = true;
        }
        pendingAdmin = pendingAdmin_;

        emit NewPendingAdmin(pendingAdmin);
    }

    function queueTransaction(
        address target,
        uint256 value,
        string memory signature,
        bytes memory data,
        uint256 eta
    ) public withinLimits(signature, data) returns (bytes32) {
        require(
            msg.sender == admin,
            "CustomMasterChefJoeV2Timelock::queueTransaction: Call must come from admin."
        );
        require(
            eta >= getBlockTimestamp().add(delay),
            "CustomMasterChefJoeV2Timelock::queueTransaction: Estimated execution block must satisfy delay."
        );

        bytes32 txHash = keccak256(
            abi.encode(target, value, signature, data, eta)
        );
        queuedTransactions[txHash] = true;

        emit QueueTransaction(txHash, target, value, signature, data, eta);
        return txHash;
    }

    function cancelTransaction(
        address target,
        uint256 value,
        string memory signature,
        bytes memory data,
        uint256 eta
    ) public {
        require(
            msg.sender == admin,
            "CustomMasterChefJoeV2Timelock::cancelTransaction: Call must come from admin."
        );

        bytes32 txHash = keccak256(
            abi.encode(target, value, signature, data, eta)
        );
        queuedTransactions[txHash] = false;

        emit CancelTransaction(txHash, target, value, signature, data, eta);
    }

    function executeTransaction(
        address target,
        uint256 value,
        string memory signature,
        bytes memory data,
        uint256 eta
    ) public payable returns (bytes memory) {
        require(
            msg.sender == admin,
            "CustomMasterChefJoeV2Timelock::executeTransaction: Call must come from admin."
        );

        bytes32 txHash = keccak256(
            abi.encode(target, value, signature, data, eta)
        );
        require(
            queuedTransactions[txHash],
            "CustomMasterChefJoeV2Timelock::executeTransaction: Transaction hasn't been queued."
        );
        require(
            getBlockTimestamp() >= eta,
            "CustomMasterChefJoeV2Timelock::executeTransaction: Transaction hasn't surpassed time lock."
        );
        require(
            getBlockTimestamp() <= eta.add(GRACE_PERIOD),
            "CustomMasterChefJoeV2Timelock::executeTransaction: Transaction is stale."
        );

        queuedTransactions[txHash] = false;

        bytes memory callData;

        callData = abi.encodePacked(bytes4(keccak256(bytes(signature))), data);

        // solium-disable-next-line security/no-call-value
        (bool success, bytes memory returnData) = target.call.value(value)(
            callData
        );
        require(
            success,
            "CustomMasterChefJoeV2Timelock::executeTransaction: Transaction execution reverted."
        );

        emit ExecuteTransaction(txHash, target, value, signature, data, eta);

        return returnData;
    }

    function getBlockTimestamp() internal view returns (uint256) {
        // solium-disable-next-line security/no-block-members
        return block.timestamp;
    }
}

// SPDX-License-Identifier: MIT

/**
 *Submitted for verification at Etherscan.io on 2020-09-18
 */

pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../interfaces/IFactory.sol";

interface IERC20 {
    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint256);

    function totalSupply() external view returns (uint256);

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

    function transfer(address recipient, uint256 amount)
        external
        returns (bool);

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

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

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    function owner() external view returns (address);

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

library BoringERC20 {
    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 "???";
        }
    }

    function symbol(IERC20 token) internal view returns (string memory) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeWithSelector(0x95d89b41)
        );
        return success ? returnDataToString(data) : "???";
    }

    function name(IERC20 token) internal view returns (string memory) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeWithSelector(0x06fdde03)
        );
        return success ? returnDataToString(data) : "???";
    }

    function decimals(IERC20 token) internal view returns (uint8) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeWithSelector(0x313ce567)
        );
        return success && data.length == 32 ? abi.decode(data, (uint8)) : 18;
    }

    function DOMAIN_SEPARATOR(IERC20 token) internal view returns (bytes32) {
        (bool success, bytes memory data) = address(token).staticcall{
            gas: 10000
        }(abi.encodeWithSelector(0x3644e515));
        return
            success && data.length == 32
                ? abi.decode(data, (bytes32))
                : bytes32(0);
    }

    function nonces(IERC20 token, address owner)
        internal
        view
        returns (uint256)
    {
        (bool success, bytes memory data) = address(token).staticcall{
            gas: 5000
        }(abi.encodeWithSelector(0x7ecebe00, owner));
        return
            success && data.length == 32
                ? abi.decode(data, (uint256))
                : uint256(-1); // Use max uint256 to signal failure to retrieve nonce (probably not supported)
    }
}

interface IMasterChef {
    function BONUS_MULTIPLIER() external view returns (uint256);

    function devaddr() external view returns (address);

    function owner() external view returns (address);

    function startTimestamp() external view returns (uint256);

    function joe() external view returns (address);

    function joePerSec() external view returns (uint256);

    function totalAllocPoint() external view returns (uint256);

    function poolLength() external view returns (uint256);

    function poolInfo(uint256 nr)
        external
        view
        returns (
            address,
            uint256,
            uint256,
            uint256
        );

    function userInfo(uint256 nr, address who)
        external
        view
        returns (uint256, uint256);

    function pendingTokens(uint256 pid, address who)
        external
        view
        returns (
            uint256,
            address,
            string memory,
            uint256
        );
}

interface IPair is IERC20 {
    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (
            uint112,
            uint112,
            uint32
        );
}

contract BoringCryptoTokenScanner {
    using SafeMath for uint256;

    struct Balance {
        address token;
        uint256 balance;
    }

    struct BalanceFull {
        address token;
        uint256 balance;
        uint256 rate;
    }

    struct TokenInfo {
        address token;
        uint256 decimals;
        string name;
        string symbol;
    }

    function getTokenInfo(address[] calldata addresses)
        public
        view
        returns (TokenInfo[] memory)
    {
        TokenInfo[] memory infos = new TokenInfo[](addresses.length);

        for (uint256 i = 0; i < addresses.length; i++) {
            IERC20 token = IERC20(addresses[i]);
            infos[i].token = address(token);

            infos[i].name = token.name();
            infos[i].symbol = token.symbol();
            infos[i].decimals = token.decimals();
        }

        return infos;
    }

    function findBalances(address who, address[] calldata addresses)
        public
        view
        returns (Balance[] memory)
    {
        uint256 balanceCount;

        for (uint256 i = 0; i < addresses.length; i++) {
            if (IERC20(addresses[i]).balanceOf(who) > 0) {
                balanceCount++;
            }
        }

        Balance[] memory balances = new Balance[](balanceCount);

        balanceCount = 0;
        for (uint256 i = 0; i < addresses.length; i++) {
            IERC20 token = IERC20(addresses[i]);
            uint256 balance = token.balanceOf(who);
            if (balance > 0) {
                balances[balanceCount].token = address(token);
                balances[balanceCount].balance = token.balanceOf(who);
                balanceCount++;
            }
        }

        return balances;
    }

    function getBalances(
        address who,
        address[] calldata addresses,
        IFactory factory,
        address currency
    ) public view returns (BalanceFull[] memory) {
        BalanceFull[] memory balances = new BalanceFull[](addresses.length);

        for (uint256 i = 0; i < addresses.length; i++) {
            IERC20 token = IERC20(addresses[i]);
            balances[i].token = address(token);
            balances[i].balance = token.balanceOf(who);

            IPair pair = IPair(factory.getPair(addresses[i], currency));
            if (address(pair) != address(0)) {
                uint256 reserveCurrency;
                uint256 reserveToken;
                if (pair.token0() == currency) {
                    (reserveCurrency, reserveToken, ) = pair.getReserves();
                } else {
                    (reserveToken, reserveCurrency, ) = pair.getReserves();
                }
                balances[i].rate = (reserveToken * 1e18) / reserveCurrency;
            }
        }

        return balances;
    }

    struct Factory {
        IFactory factory;
        uint256 allPairsLength;
        address feeTo;
        address feeToSetter;
    }

    function getFactoryInfo(IFactory[] calldata addresses)
        public
        view
        returns (Factory[] memory)
    {
        Factory[] memory factories = new Factory[](addresses.length);

        for (uint256 i = 0; i < addresses.length; i++) {
            IFactory factory = addresses[i];
            factories[i].factory = factory;

            factories[i].allPairsLength = factory.allPairsLength();
            factories[i].feeTo = factory.feeTo();
            factories[i].feeToSetter = factory.feeToSetter();
        }

        return factories;
    }

    struct Pair {
        address token;
        address token0;
        address token1;
    }

    function getPairs(
        IFactory factory,
        uint256 fromID,
        uint256 toID
    ) public view returns (Pair[] memory) {
        if (toID == 0) {
            toID = factory.allPairsLength();
        }

        Pair[] memory pairs = new Pair[](toID - fromID);

        for (uint256 id = fromID; id < toID; id++) {
            address token = factory.allPairs(id);
            uint256 i = id - fromID;
            pairs[i].token = token;
            pairs[i].token0 = IPair(token).token0();
            pairs[i].token1 = IPair(token).token1();
        }
        return pairs;
    }

    function findPairs(
        address who,
        IFactory factory,
        uint256 fromID,
        uint256 toID
    ) public view returns (Pair[] memory) {
        if (toID == 0) {
            toID = factory.allPairsLength();
        }

        uint256 pairCount;

        for (uint256 id = fromID; id < toID; id++) {
            address token = factory.allPairs(id);
            if (IERC20(token).balanceOf(who) > 0) {
                pairCount++;
            }
        }

        Pair[] memory pairs = new Pair[](pairCount);

        pairCount = 0;
        for (uint256 id = fromID; id < toID; id++) {
            address token = factory.allPairs(id);
            uint256 balance = IERC20(token).balanceOf(who);
            if (balance > 0) {
                pairs[pairCount].token = token;
                pairs[pairCount].token0 = IPair(token).token0();
                pairs[pairCount].token1 = IPair(token).token1();
                pairCount++;
            }
        }

        return pairs;
    }

    struct PairFull {
        address token;
        address token0;
        address token1;
        uint256 reserve0;
        uint256 reserve1;
        uint256 totalSupply;
        uint256 balance;
    }

    function getPairsFull(address who, address[] calldata addresses)
        public
        view
        returns (PairFull[] memory)
    {
        PairFull[] memory pairs = new PairFull[](addresses.length);
        for (uint256 i = 0; i < addresses.length; i++) {
            address token = addresses[i];
            pairs[i].token = token;
            pairs[i].token0 = IPair(token).token0();
            pairs[i].token1 = IPair(token).token1();
            (uint256 reserve0, uint256 reserve1, ) = IPair(token).getReserves();
            pairs[i].reserve0 = reserve0;
            pairs[i].reserve1 = reserve1;
            pairs[i].balance = IERC20(token).balanceOf(who);
        }
        return pairs;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {
    "": {
      "__CACHE_BREAKER__": "0x00000000d41867734bbee4c6863d9255b2b06ac1"
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"maxSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"numCheckpoints","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000b536d6172746572436f696e0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005534d525472000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : name (string): SmarterCoin
Arg [1] : symbol (string): SMRTr

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000040
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 000000000000000000000000000000000000000000000000000000000000000b
Arg [3] : 536d6172746572436f696e000000000000000000000000000000000000000000
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000005
Arg [5] : 534d525472000000000000000000000000000000000000000000000000000000

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