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// SPDX-License-Identifier: UNLICENSED
/* 

  _                          _   _____   _                       
 | |       ___   _ __     __| | |  ___| | |   __ _   _ __    ___ 
 | |      / _ \ | '_ \   / _` | | |_    | |  / _` | | '__|  / _ \
 | |___  |  __/ | | | | | (_| | |  _|   | | | (_| | | |    |  __/
 |_____|  \___| |_| |_|  \__,_| |_|     |_|  \__,_| |_|     \___|
                                                                 
LendFlare.finance
*/

pragma solidity =0.6.12;

import "@openzeppelin/contracts/math/Math.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/proxy/Clones.sol";
import "./ConvexInterfacesV2.sol";
import "../common/IVirtualBalanceWrapper.sol";

interface IConvexRewardPoolClone {
    function initialize(
        address _rewardToken,
        address _virtualBalance,
        address _depositer,
        address _owner
    ) external;
}

contract ConvexRewardPoolV2Clone is ReentrancyGuard, IConvexRewardPoolV2 {
    using Address for address payable;
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    address public override rewardToken;
    uint256 public constant duration = 7 days;

    address public owner;
    address public depositer;
    address public virtualBalance;

    uint256 public periodFinish = 0;
    uint256 public rewardRate = 0;
    uint256 public lastUpdateTime;
    uint256 public rewardPerTokenStored;

    bool private initialized;

    address[] public override extraRewards;

    mapping(address => uint256) public override userRewardPerTokenPaid;
    mapping(address => uint256) public override rewards;

    event RewardAdded(uint256 reward);
    event Staked(address indexed user);
    event Withdrawn(address indexed user);
    event RewardPaid(address indexed user, uint256 reward);

    modifier updateReward(address account) {
        rewardPerTokenStored = rewardPerToken();
        lastUpdateTime = lastTimeRewardApplicable();

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

    constructor() public {
        initialized = true;
    }

    function initialize(
        address _rewardToken,
        address _virtualBalance,
        address _depositer,
        address _owner
    ) public {
        require(!initialized, "ConvexRewardPool: !initialized");

        rewardToken = _rewardToken;
        virtualBalance = _virtualBalance;
        depositer = _depositer;
        owner = _owner;
        
        initialized = true;
    }

    function totalSupply() public view returns (uint256) {
        return IVirtualBalanceWrapper(virtualBalance).totalSupply();
    }

    function balanceOf(address _for) public view returns (uint256) {
        return IVirtualBalanceWrapper(virtualBalance).balanceOf(_for);
    }

    function extraRewardsLength() external view override returns (uint256) {
        return extraRewards.length;
    }

    function addExtraReward(address _reward) external override returns (bool) {
        require(msg.sender == owner, "ConvexRewardPool: !authorized addExtraReward");
        require(_reward != address(0), "!reward setting");

        extraRewards.push(_reward);
        return true;
    }

    function clearExtraRewards() external override {
        require(msg.sender == owner, "ConvexRewardPool: !authorized clearExtraRewards");

        delete extraRewards;
    }

    function lastTimeRewardApplicable() public view returns (uint256) {
        return Math.min(block.timestamp, periodFinish);
    }

    function rewardPerToken() public view returns (uint256) {
        if (totalSupply() == 0) {
            return rewardPerTokenStored;
        }
        return rewardPerTokenStored.add(lastTimeRewardApplicable().sub(lastUpdateTime).mul(rewardRate).mul(1e18).div(totalSupply()));
    }

    function earned(address _for) public view override returns (uint256) {
        return balanceOf(_for).mul(rewardPerToken().sub(userRewardPerTokenPaid[_for])).div(1e18).add(rewards[_for]);
    }

    function stake(address _for) public override nonReentrant updateReward(_for) {
        require(msg.sender == depositer, "ConvexRewardPool: !authorized stake");

        //also stake to linked rewards
        uint256 length = extraRewards.length;
        for (uint256 i = 0; i < length; i++) {
            IConvexRewardPool(extraRewards[i]).stake(_for);
        }

        emit Staked(_for);
    }

    function withdraw(address _for) public override nonReentrant updateReward(_for) {
        require(msg.sender == depositer, "ConvexRewardPool: !authorized withdraw");

        //also stake to linked rewards
        uint256 length = extraRewards.length;
        for (uint256 i = 0; i < length; i++) {
            IConvexRewardPool(extraRewards[i]).withdraw(_for);
        }

        emit Withdrawn(_for);
    }

    function getReward(address _for) public override nonReentrant updateReward(_for) {
        uint256 reward = rewards[_for];

        if (reward > 0) {
            rewards[_for] = 0;

            if (rewardToken != address(0)) {
                IERC20(rewardToken).safeTransfer(_for, reward);
            } else {
                require(address(this).balance >= reward, "!address(this).balance");

                payable(_for).sendValue(reward);
            }

            emit RewardPaid(_for, reward);
        }

        for (uint256 i = 0; i < extraRewards.length; i++) {
            IConvexRewardPool(extraRewards[i]).getReward(_for);
        }
    }

    function donate(uint256 _amount) external payable returns (bool) {
        require(_amount > 0, "!_amount");

        if (rewardToken == address(0)) {
            require(msg.value == _amount, "!_amount");
        } else {
            IERC20(rewardToken).safeTransferFrom(msg.sender, address(this), _amount);
        }

        notifyRewardAmount(_amount);

        return true;
    }

    function notifyRewardAmount(uint256 reward) public override updateReward(address(0)) {
        require(msg.sender == owner, "ConvexRewardPool: !authorized notifyRewardAmount");
        // overflow fix according to https://sips.synthetix.io/sips/sip-77
        require(reward < uint256(-1) / 1e18, "the notified reward cannot invoke multiplication overflow");

        if (block.timestamp >= periodFinish) {
            rewardRate = reward.div(duration);
        } else {
            uint256 remaining = periodFinish.sub(block.timestamp);
            uint256 leftover = remaining.mul(rewardRate);
            rewardRate = reward.add(leftover).div(duration);
        }

        lastUpdateTime = block.timestamp;
        periodFinish = block.timestamp.add(duration);

        emit RewardAdded(reward);
    }

    // solhint-disable-next-line no-empty-blocks
    receive() external payable {}
}

contract ConvexRewardFactoryV2Clone {
    address public owner;
    address public master;

    event CreateReward(address rewardPool, address rewardToken);

    constructor(address _owner) public {
        owner = _owner;

        master = address(new ConvexRewardPoolV2Clone());
    }

    function setOwner(address _owner) external {
        require(msg.sender == owner, "ConvexRewardFactory: !authorized setOwner");

        owner = _owner;
    }

    function createReward(
        address _rewardToken,
        address _virtualBalance,
        address _depositer,
        address _owner
    ) external returns (address) {
        require(msg.sender == owner, "ConvexRewardFactory: !authorized createReward");

        address instance = Clones.clone(address(master));

        IConvexRewardPoolClone(instance).initialize(_rewardToken, _virtualBalance, _depositer, _owner);

        emit CreateReward(instance, _rewardToken);

        return instance;
    }
}

// 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 >=0.6.0 <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;

/**
 * @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 >=0.6.0 <0.8.0;

/**
 * @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
 * deploying minimal proxy contracts, also known as "clones".
 *
 * > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
 * > a minimal bytecode implementation that delegates all calls to a known, fixed address.
 *
 * The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
 * (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
 * deterministic method.
 *
 * _Available since v3.4._
 */
library Clones {
    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `master`.
     *
     * This function uses the create opcode, which should never revert.
     */
    function clone(address master) internal returns (address instance) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, master))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create(0, ptr, 0x37)
        }
        require(instance != address(0), "ERC1167: create failed");
    }

    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `master`.
     *
     * This function uses the create2 opcode and a `salt` to deterministically deploy
     * the clone. Using the same `master` and `salt` multiple time will revert, since
     * the clones cannot be deployed twice at the same address.
     */
    function cloneDeterministic(address master, bytes32 salt) internal returns (address instance) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, master))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create2(0, ptr, 0x37, salt)
        }
        require(instance != address(0), "ERC1167: create2 failed");
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(address master, bytes32 salt, address deployer) internal pure returns (address predicted) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, master))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
            mstore(add(ptr, 0x38), shl(0x60, deployer))
            mstore(add(ptr, 0x4c), salt)
            mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
            predicted := keccak256(add(ptr, 0x37), 0x55)
        }
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(address master, bytes32 salt) internal view returns (address predicted) {
        return predictDeterministicAddress(master, salt, address(this));
    }
}

// SPDX-License-Identifier: UNLICENSED
/* 

  _                          _   _____   _                       
 | |       ___   _ __     __| | |  ___| | |   __ _   _ __    ___ 
 | |      / _ \ | '_ \   / _` | | |_    | |  / _` | | '__|  / _ \
 | |___  |  __/ | | | | | (_| | |  _|   | | | (_| | | |    |  __/
 |_____|  \___| |_| |_|  \__,_| |_|     |_|  \__,_| |_|     \___|
                                                                 
LendFlare.finance
*/

pragma solidity =0.6.12;

import "./ConvexInterfaces.sol";
import "./IConvexBoosterV2.sol";

interface ICurveSwapV2 is ICurveSwap {
    // function remove_liquidity_one_coin(
    //     uint256 _token_amount,
    //     int128 _i,
    //     uint256 _min_amount
    // ) external override;

    function remove_liquidity_one_coin(
        address _pool,
        uint256 _burn_amount,
        int128 _i,
        uint256 _min_amount
    ) external;

    // function coins(uint256 _coinId) external view returns(address); in ICurveSwap
    function coins(int128 _coinId) external view returns (address);

    function balances(uint256 _coinId) external view override returns (uint256);

    function get_virtual_price() external view returns (uint256);

    function calc_withdraw_one_coin(uint256 _tokenAmount, int128 _tokenId) external view returns (uint256);

    /* factory */
    function calc_withdraw_one_coin(
        address _pool,
        uint256 _tokenAmount,
        int128 _tokenId
    ) external view returns (uint256);
}

interface IConvexRewardPoolV2 is IConvexRewardPool {
    function clearExtraRewards() external;

    function rewardToken() external returns (address);

    function userRewardPerTokenPaid(address) external returns (uint256);

    function rewards(address) external returns (uint256);
}

interface IConvexRewardFactoryV2 is IConvexRewardFactory {
    function createReward(address _reward, address _virtualBalance, address _depositer,address _owner) external returns (address);
}

// SPDX-License-Identifier: UNLICENSED
/* 

  _                          _   _____   _                       
 | |       ___   _ __     __| | |  ___| | |   __ _   _ __    ___ 
 | |      / _ \ | '_ \   / _` | | |_    | |  / _` | | '__|  / _ \
 | |___  |  __/ | | | | | (_| | |  _|   | | | (_| | | |    |  __/
 |_____|  \___| |_| |_|  \__,_| |_|     |_|  \__,_| |_|     \___|
                                                                 
LendFlare.finance
*/

pragma solidity =0.6.12;

interface IVirtualBalanceWrapperFactory {
    function createWrapper(address _op) external returns (address);
}

interface IVirtualBalanceWrapper {
    function totalSupply() external view returns (uint256);
    function balanceOf(address _account) external view returns (uint256);
    function stakeFor(address _for, uint256 _amount) external returns (bool);
    function withdrawFor(address _for, uint256 amount) external returns (bool);
}

// 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 >=0.6.0 <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 >=0.6.2 <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: UNLICENSED
/* 

  _                          _   _____   _                       
 | |       ___   _ __     __| | |  ___| | |   __ _   _ __    ___ 
 | |      / _ \ | '_ \   / _` | | |_    | |  / _` | | '__|  / _ \
 | |___  |  __/ | | | | | (_| | |  _|   | | | (_| | | |    |  __/
 |_____|  \___| |_| |_|  \__,_| |_|     |_|  \__,_| |_|     \___|
                                                                 
LendFlare.finance
*/

pragma solidity =0.6.12;

import "./IConvexBooster.sol";

interface IOriginConvexBooster {
    function deposit( uint256 _pid, uint256 _amount, bool _stake ) external returns (bool);
    function withdraw(uint256 _pid, uint256 _amount) external returns(bool);
    function claimStashToken(address _token, address _rewardAddress, address _lfRewardAddress, uint256 _rewards) external;
    function poolInfo(uint256) external view returns(address,address,address,address,address, bool);
    function isShutdown() external view returns(bool);
    function minter() external view returns(address);
    function earmarkRewards(uint256) external returns(bool);
}

interface IOriginConvexRewardPool {
    function getReward() external returns(bool);
    function getReward(address _account, bool _claimExtras) external returns(bool);
    function withdrawAllAndUnwrap(bool claim) external;
    function withdrawAndUnwrap(uint256 amount, bool claim) external returns(bool);
    function withdrawAll(bool claim) external;
    function withdraw(uint256 amount, bool claim) external returns(bool);
    function stakeFor(address _for, uint256 _amount) external returns(bool);
    function stakeAll() external returns(bool);
    function stake(uint256 _amount) external returns(bool);
    function earned(address account) external view returns (uint256);
    function rewardPerToken() external view returns (uint256);
    function rewardToken() external returns(address);
    function extraRewards(uint256 _idx) external view returns (address);
    function extraRewardsLength() external view returns (uint256);
}

interface IOriginConvexVirtualBalanceRewardPool {
    function getReward(address _account) external;
    function getReward() external;
    function rewardToken() external returns(address);
}

interface IConvexRewardPool {
    function earned(address account) external view returns (uint256);
    function stake(address _for) external;
    function withdraw(address _for) external;
    function getReward(address _for) external;
    function notifyRewardAmount(uint256 reward) external;

    function extraRewards(uint256 _idx) external view returns (address);
    function extraRewardsLength() external view returns (uint256);
    function addExtraReward(address _reward) external returns(bool);
}

interface IConvexRewardFactory {
    function createReward(address _reward, address _virtualBalance, address _operator) external returns (address);
}

interface ICurveSwap {
    function remove_liquidity_one_coin(uint256 _token_amount, int128 i, uint256 min_amount) external;
    /* function remove_liquidity(uint256 _token_amount, uint256[] memory min_amounts) external; */
    function coins(uint256 _coinId) external view returns(address);
    function balances(uint256 _coinId) external view returns(uint256);
}

interface ICurveAddressProvider{
    function get_registry() external view returns(address);
    function get_address(uint256 _id) external view returns(address);
}

interface ICurveRegistry{
    function gauge_controller() external view returns(address);
    function get_lp_token(address) external view returns(address);
    function get_pool_from_lp_token(address) external view returns(address);
    function get_gauges(address) external view returns(address[10] memory,uint128[10] memory);
}

// SPDX-License-Identifier: UNLICENSED
/* 

  _                          _   _____   _                       
 | |       ___   _ __     __| | |  ___| | |   __ _   _ __    ___ 
 | |      / _ \ | '_ \   / _` | | |_    | |  / _` | | '__|  / _ \
 | |___  |  __/ | | | | | (_| | |  _|   | | | (_| | | |    |  __/
 |_____|  \___| |_| |_|  \__,_| |_|     |_|  \__,_| |_|     \___|
                                                                 
LendFlare.finance
*/

pragma solidity =0.6.12;

import "./IConvexBooster.sol";

interface IConvexBoosterV2 is IConvexBooster {
    function liquidate(
        uint256 _convexPid,
        int128 _curveCoinId,
        address _user,
        uint256 _amount
    ) external override returns (address, uint256);

    function depositFor(
        uint256 _convexPid,
        uint256 _amount,
        address _user
    ) external override returns (bool);

    function withdrawFor(
        uint256 _convexPid,
        uint256 _amount,
        address _user,
        bool _freezeTokens
    ) external override returns (bool);

    function poolInfo(uint256 _convexPid)
        external
        view
        override
        returns (
            uint256 originConvexPid,
            address curveSwapAddress,
            address lpToken,
            address originCrvRewards,
            address originStash,
            address virtualBalance,
            address rewardCrvPool,
            address rewardCvxPool,
            bool shutdown
        );

    function addConvexPool(uint256 _originConvexPid) external override;

    function addConvexPool(
        uint256 _originConvexPid,
        address _curveSwapAddress,
        address _curveZapAddress,
        address _basePoolAddress,
        bool _isMeta,
        bool _isMetaFactory
    ) external;

    function getPoolZapAddress(address _lpToken)
        external
        view
        returns (address);

    function getPoolToken(uint256 _pid) external view returns (address);

    function calculateTokenAmount(
        uint256 _pid,
        uint256 _tokens,
        int128 _curveCoinId
    ) external view returns (uint256);

    function updateMovingLeverage(
        uint256 _pid,
        uint256 _tokens,
        int128 _curveCoinId
    ) external returns (uint256);
}

interface IMovingLeverageBase {
    function get(uint256 _pid, int128 _coinId) external view returns (uint256);
}

// SPDX-License-Identifier: UNLICENSED
/* 

  _                          _   _____   _                       
 | |       ___   _ __     __| | |  ___| | |   __ _   _ __    ___ 
 | |      / _ \ | '_ \   / _` | | |_    | |  / _` | | '__|  / _ \
 | |___  |  __/ | | | | | (_| | |  _|   | | | (_| | | |    |  __/
 |_____|  \___| |_| |_|  \__,_| |_|     |_|  \__,_| |_|     \___|
                                                                 
LendFlare.finance
*/

pragma solidity =0.6.12;

interface IConvexBooster {
    function liquidate(
        uint256 _convexPid,
        int128 _curveCoinId,
        address _user,
        uint256 _amount
    ) external returns (address, uint256);

    function depositFor(
        uint256 _convexPid,
        uint256 _amount,
        address _user
    ) external returns (bool);

    function withdrawFor(
        uint256 _convexPid,
        uint256 _amount,
        address _user,
        bool _freezeTokens
    ) external returns (bool);

    function poolInfo(uint256 _convexPid)
        external
        view
        returns (
            uint256 originConvexPid,
            address curveSwapAddress,
            address lpToken,
            address originCrvRewards,
            address originStash,
            address virtualBalance,
            address rewardCrvPool,
            address rewardCvxPool,
            bool shutdown
        );

    function addConvexPool(uint256 _originConvexPid) external;
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"rewardPool","type":"address"},{"indexed":false,"internalType":"address","name":"rewardToken","type":"address"}],"name":"CreateReward","type":"event"},{"inputs":[{"internalType":"address","name":"_rewardToken","type":"address"},{"internalType":"address","name":"_virtualBalance","type":"address"},{"internalType":"address","name":"_depositer","type":"address"},{"internalType":"address","name":"_owner","type":"address"}],"name":"createReward","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"master","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"setOwner","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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0000000000000000000000004c3c78cebc9cc87436deed2782998bc002f2b69f

-----Decoded View---------------
Arg [0] : _owner (address): 0x4C3c78cEbc9Cc87436dEEd2782998bC002F2B69f

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000004c3c78cebc9cc87436deed2782998bc002f2b69f