// File: node_modules\@openzeppelin\contracts\GSN\Context.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/*
 * @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;
    }
}

// File: @openzeppelin\contracts\access\Ownable.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @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.
 */
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 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;
    }
}

// File: @openzeppelin\contracts\math\SafeMath.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @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, 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) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * 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);
        uint256 c = a - b;

        return c;
    }

    /**
     * @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) {
        // 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 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts 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) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts 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) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: @openzeppelin\contracts\token\ERC20\IERC20.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @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);
}

// File: node_modules\@openzeppelin\contracts\token\ERC20\IERC20.sol

// SPDX-License-Identifier: MIT

// pragma solidity ^0.6.0;

// /**
//  * @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);
// }

// File: node_modules\@openzeppelin\contracts\math\SafeMath.sol

// SPDX-License-Identifier: MIT

// pragma solidity ^0.6.0;

// /**
//  * @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, 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) {
//         return sub(a, b, "SafeMath: subtraction overflow");
//     }

//     /**
//      * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
//      * overflow (when the result is negative).
//      *
//      * 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);
//         uint256 c = a - b;

//         return c;
//     }

//     /**
//      * @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) {
//         // 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 0;
//         }

//         uint256 c = a * b;
//         require(c / a == b, "SafeMath: multiplication overflow");

//         return c;
//     }

//     /**
//      * @dev Returns the integer division of two unsigned integers. Reverts 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) {
//         return div(a, b, "SafeMath: division by zero");
//     }

//     /**
//      * @dev Returns the integer division of two unsigned integers. Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
//         require(b > 0, errorMessage);
//         uint256 c = a / b;
//         // assert(a == b * c + a % b); // There is no case in which this doesn't hold

//         return c;
//     }

//     /**
//      * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
//      * Reverts 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) {
//         return mod(a, b, "SafeMath: modulo by zero");
//     }

//     /**
//      * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
//      * Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
//         require(b != 0, errorMessage);
//         return a % b;
//     }
// }

// File: node_modules\@openzeppelin\contracts\utils\Address.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.2;

/**
 * @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 in 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");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        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);
            }
        }
    }
}

// File: @openzeppelin\contracts\token\ERC20\ERC20.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;





/**
 * @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;
    using Address for address;

    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 returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view 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 returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view 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 {
        _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 { }
}

// File: contracts\WarpWrapperToken.sol

pragma solidity ^0.6.2;



////////////////////////////////////////////////////////////////////////////////////////////
/// @title WarpWrapperToken
/// @author Christopher Dixon
////////////////////////////////////////////////////////////////////////////////////////////
/**
@notice the WarpWrapperToken contract is designed  as a token Wrapper to represent ownership of stablecoins added to a specific
        WarpVault. This contract inherits Ownership and ERC20 functionality from the Open Zeppelin Library.
**/
contract WarpWrapperToken is Ownable, ERC20 {
    address public stablecoin;

    ///@notice constructor sets up token names and symbols for the WarpWrapperToken
    constructor(
        address _SC,
        string memory _tokenName,
        string memory _tokenSymbol
    ) public ERC20(_tokenSymbol, _tokenName) {
        stablecoin = _SC;
    }

    /**
@notice mint is an only owner function that allows the owner to mint new tokens to an input account
@param _to is the address that will receive the new tokens
@param _amount is the amount of token they will receive
**/
    function mint(address _to, uint256 _amount) public onlyOwner {
        _mint(_to, _amount);
    }

    /**
@notice burn is an only owner function that allows the owner to burn  tokens from an input account
@param _from is the address where the tokens will be burnt
@param _amount is the amount of token to be burnt
**/
    function burn(address _from, uint256 _amount) public onlyOwner {
        _burn(_from, _amount);
    }
}

// File: contracts\interfaces\WarpControlI.sol

pragma solidity ^0.6.0;

////////////////////////////////////////////////////////////////////////////////////////////
/// @title WarpVaultI
/// @author Christopher Dixon
////////////////////////////////////////////////////////////////////////////////////////////
/**
The WarpControlI contract is an abstract contract used by individual WarpVault contracts to call the
  maxWithdrawAllowed function on the WarpControl contract
**/

abstract contract WarpControlI {
    function getMaxWithdrawAllowed(address account, address lpToken) public virtual returns (uint256);
    function viewMaxWithdrawAllowed(address account, address lpToken) public view virtual returns (uint256);
    function viewPriceOfCollateral(address lpToken) public virtual view returns (uint256);
    function addMemberToGroup(address _refferalCode, address _member) public virtual;
    function checkIfGroupMember(address _account) public view virtual returns(bool);
    function getTotalAvailableCollateralValue(address _account) public virtual returns (uint256);
    function viewTotalAvailableCollateralValue(address _account) public view virtual returns (uint256);
    function viewPriceOfToken(address token) public view virtual returns(uint256);
    function viewTotalBorrowedValue(address _account) public view virtual returns (uint256);
    function getTotalBorrowedValue(address _account) public virtual returns (uint256);
    function calcBorrowLimit(uint256 _collateralValue) public pure virtual returns (uint256);
    function calcCollateralRequired(uint256 _borrowAmount) public view virtual returns (uint256);
    function getBorrowLimit(address _account) public virtual returns (uint256);
    function viewBorrowLimit(address _account) public view virtual returns (uint256);
    function liquidateAccount(address _borrower) public virtual;
}

// File: contracts\WarpVaultLP.sol

pragma solidity ^0.6.2;






////////////////////////////////////////////////////////////////////////////////////////////
/// @title WarpVaultLP
/// @author Christopher Dixon
////////////////////////////////////////////////////////////////////////////////////////////
/**
@notice the WarpVaultLP contract is the main point of interface for a specific LP asset class and an end user in the
Warp lending platform. This contract is responsible for distributing WarpWrapper tokens in exchange for stablecoin assets,
holding and accounting of stablecoins and LP tokens and all associates lending/borrowing calculations for a specific Warp LP asset class.
This contract inherits Ownership and ERC20 functionality from the Open Zeppelin Library as well as Exponential and the InterestRateModel contracts
from the coumpound protocol.
**/

contract WarpVaultLP is Ownable {
    using SafeMath for uint256;

    uint256 public timeWizard;
    string public lpName;

    IERC20 public LPtoken;
    WarpControlI public WC;

    mapping(address => uint256) public collateralizedLP;

    event CollateralProvided(address _account, uint _amount);
    event CollateralWithdraw(address _account, uint amount);
    /**
     * @dev Throws if called by any account other than a warp control
     */
    modifier onlyWC() {
        require(msg.sender == address(WC));
        _;
    }

/**
@dev Throws if a function is called before the time wizard allows it
**/
    modifier angryWizard() {
        require(now > timeWizard);
        _;
    }
    /**
    @notice constructor sets up token names and symbols for the WarpWrapperToken
    @param _lp is the address of the lp token a specific Warp vault will represent
    @param _lpName is the name of the lp token
    @param _timelock is a variable representing the number of seconds the timeWizard will prevent withdraws and borrows from a contracts(one week is 605800 seconds)
    @dev this function instantiates the lp token as a useable object and generates three WarpWrapperToken contracts to represent
        each type of stable coin this vault can hold. this also instantiates each of these contracts as a usable object in this contract giving
        this contract the ability to call their mint and burn functions.
    **/
    constructor(
        uint256 _timelock,
        address _lp,
        address _WarpControl,
        string memory _lpName
    ) public {
        lpName = _lpName;
        LPtoken = IERC20(_lp);
        WC = WarpControlI(_WarpControl);
        timeWizard = now.add(_timelock);
    }

    function upgrade(address _warpControl) public onlyWC {
      WC = WarpControlI(_warpControl);
      transferOwnership(_warpControl);
    }

    /**
    @notice provideCollateral allows a user to collateralize this contracts associated LP token
    @param _amount is the amount of LP being collateralized
    **/
    function provideCollateral(uint256 _amount) public {
        require(LPtoken.allowance(msg.sender, address(this)) >= _amount, "Vault must have enough allowance.");
        require(LPtoken.balanceOf(msg.sender) >= _amount, "Must have enough LP to provide");
        LPtoken.transferFrom(msg.sender, address(this), _amount);
        collateralizedLP[msg.sender] = collateralizedLP[msg.sender].add(
            _amount
        );

        emit CollateralProvided(msg.sender, _amount);
    }

    /**
    @notice withdrawCollateral allows the user to trade in his WarpLP tokens for hiss underlying LP token collateral
    @param _amount is the amount of LP tokens he wishes to withdraw
    **/
    function withdrawCollateral(uint256 _amount) public {
        uint256 amount;
        uint256 maxAmount = WC.getMaxWithdrawAllowed(msg.sender, address(LPtoken));
        if(_amount == 0) {
            amount = maxAmount;
          } else {
            amount = _amount;
          }

        //require the availible value of the LP locked in this contract the user has
        //is greater than or equal to the amount being withdrawn
        require(
            maxAmount >= amount,
            "Trying to withdraw too much"
        );
        //require the user has locked up enough collateral to withdraw this amount
        require(collateralizedLP[msg.sender] >= amount, "you are trying to withdraw more collateral than you have locked");

        //subtract withdrawn amount from amount stored
        collateralizedLP[msg.sender] = collateralizedLP[msg.sender].sub(
            amount
        );
        //transfer them their token
        LPtoken.transfer(msg.sender, amount);
        emit CollateralWithdraw(msg.sender, amount);
    }

    /**
    @notice getAssetAdd allows for easy retrieval of a WarpVaults LP token Adress
    **/
    function getAssetAdd() public view returns (address) {
        return address(LPtoken);
    }

    /**
@notice collateralOfAccount is a view function to retreive an accounts collateralized LP amount
@param _account is the address of the account being looked up
**/
    function collateralOfAccount(address _account)
        public
        view
        returns (uint256)
    {
        return collateralizedLP[_account];
    }

    /**
@notice _liquidateAccount is a function to liquidate the LP tokens of the input account
@param _account is the address of the account being liquidated
@param _liquidator is the address of the account doing the liquidating who receives the liquidated LP's
@dev this function uses the onlyWC modifier meaning that only the Warp Control contract can call it
**/
    function _liquidateAccount(address _account, address _liquidator)
        public
        onlyWC
        angryWizard
    {
        //transfer the LP tokens to the liquidator
        LPtoken.transfer(_liquidator, collateralizedLP[_account]);
        //reset the borrowers collateral tracker
        collateralizedLP[_account] = 0;
    }

    function valueOfAccountCollateral(address _account) external view returns(uint256) {
        uint256 collateralPrice = WC.viewPriceOfCollateral(address(LPtoken));
        uint256 collateralValue = collateralizedLP[_account].mul(collateralPrice);
        return collateralValue;
    }
}