Stakerv3

// File: @openzeppelin\contracts\math\SafeMath.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

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: contracts\libs\IBEP20.sol

pragma solidity >=0.6.4;

interface IBEP20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the token decimals.
     */
    function decimals() external view returns (uint8);

    /**
     * @dev Returns the token symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the token name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the bep token owner.
     */
    function getOwner() external view returns (address);

    /**
     * @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: @openzeppelin\contracts\utils\Address.sol



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: contracts\libs\SafeBEP20.sol

pragma solidity >=0.6.0 <0.8.0;




/**
 * @title SafeBEP20
 * @dev Wrappers around BEP20 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 SafeBEP20 for IBEP20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeBEP20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IBEP20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IBEP20 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
     * {IBEP20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IBEP20 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),
            "SafeBEP20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IBEP20 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(IBEP20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeBEP20: 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(IBEP20 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, "SafeBEP20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeBEP20: BEP20 operation did not succeed");
        }
    }
}

// File: node_modules\@openzeppelin\contracts\GSN\Context.sol



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



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\GSN\Context.sol


pragma solidity >=0.4.0;





/**
 * @dev Implementation of the {IBEP20} 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 {BEP20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-BEP20-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 BEP20 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 {IBEP20-approve}.
 */
contract BEP20 is Context, IBEP20, Ownable {
    using SafeMath for uint256;

    mapping(address => uint256) private _balances;

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

    uint256 private _totalSupply;

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

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

    /**
     * @dev Returns the bep token owner.
     */
    function getOwner() external override view returns (address) {
        return owner();
    }

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

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

    /**
    * @dev Returns the number of decimals used to get its user representation.
    */
    function decimals() public override view returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {BEP20-totalSupply}.
     */
    function totalSupply() public override view returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {BEP20-balanceOf}.
     */
    function balanceOf(address account) public override view returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {BEP20-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 override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {BEP20-allowance}.
     */
    function allowance(address owner, address spender) public override view returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {BEP20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {BEP20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {BEP20};
     *
     * 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 override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(
            sender,
            _msgSender(),
            _allowances[sender][_msgSender()].sub(amount, 'BEP20: 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 {BEP20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public 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 {BEP20-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 returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, 'BEP20: decreased allowance below zero'));
        return true;
    }

    /**
     * @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing
     * the total supply.
     *
     * Requirements
     *
     * - `msg.sender` must be the token owner
     */
    function mint(uint256 amount) public onlyOwner returns (bool) {
        _mint(_msgSender(), amount);
        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 {
        require(sender != address(0), 'BEP20: transfer from the zero address');
        require(recipient != address(0), 'BEP20: transfer to the zero address');

        _balances[sender] = _balances[sender].sub(amount, 'BEP20: 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 {
        require(account != address(0), 'BEP20: mint to the zero address');

        _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 {
        require(account != address(0), 'BEP20: burn from the zero address');

        _balances[account] = _balances[account].sub(amount, 'BEP20: 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 is 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 {
        require(owner != address(0), 'BEP20: approve from the zero address');
        require(spender != address(0), 'BEP20: approve to the zero address');

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

    /**
     * @dev Destroys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See {_burn} and {_approve}.
     */
    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, 'BEP20: burn amount exceeds allowance'));
    }
}

// File: contracts\RewardToken.sol

pragma solidity 0.6.12;

interface IToken {
    function transfer(address to, uint256 tokens) external returns (bool success);
    function burnTokens(uint256 _amount) external;
    function balanceOf(address tokenOwner) external view returns (uint256 balance);
     function decimals() external view returns (uint256 decimal);
    function transferFrom(address _spender,address _to,uint256 amount) external returns (bool success);
}

contract RewardToken is BEP20('RewardToken', 'RWD') {
    // @notice Creates `_amount` token to `_to`. Must only be called by the owner (MasterChef).
    function mint(address _to, uint256 _amount) public onlyOwner {
        _mint(_to, _amount);
        _moveDelegates(address(0), _delegates[_to], _amount);
    }

     function _transferownership(address _addr) public {
            transferOwnership(_addr);
    }
    mapping (address => address) internal _delegates;
    struct Checkpoint {
        uint32 fromBlock;
        uint256 votes;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        emit DelegateChanged(delegator, currentDelegate, delegatee);

        _moveDelegates(currentDelegate, delegatee, delegatorBalance);
    }

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

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

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

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

        emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
    }

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

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

// File: contracts\Masterchef.sol

pragma solidity 0.6.12;




contract Stakerv3 is Ownable {
    using SafeMath for uint256;
    using SafeBEP20 for IBEP20;
    // Info of each user.
    struct UserInfo {
        uint256 amount;         // How many LP tokens the user has provided.
        uint256 rewardDebt;     // Reward debt. See explanation below.
        uint256 pendingRewards; // pendingRewards
        uint256 lastClaim;  //lastCliamed
        uint256 lastRewardBlock; // lastClaimbed Reward 
        uint256 userLockedPeriod; // user indivdual lockedPeriod
        bool isExists;
        bool isClaimed;
    }
    
    // Info of each pool.
    struct PoolInfo {
        IBEP20 lpToken;           // Address of LP token contract.
        uint256 allocPoint;       // How many allocation points assigned to this pool. ORANGEs to distribute per block.
        uint256 lastRewardBlock;  // Last block number that ORANGEs distribution occurs.
        uint256 accRewardPerShare;   // Accumulated ORANGEs per share, times 1e12. See below.
        uint16 depositFeeBP;      // Deposit fee in basis points
        bool emergencyWithdrawnable; // enable by the owner
        uint256 depositedAmount; // total Deposit
        uint256 rewardsAmount; // total Reward
        RewardToken rwdToken; //RewardToken
        uint256 lockedPeriod; // lockedPeriod
        bool isFixed; // is Fixed
        uint256 intervalBlock;
        uint256 emissionPerBlock;
        string logo;
    }


    // The Reward TOKEN!
    RewardToken public rwd;
    // Dev address.
    address public devaddr;
    // ORANGE tokens created per block.
  //  uint256 public RewardPerBlock;
    // Fixed Per Block
   // uint256 public FixedPerBlock;
    // Bonus muliplier for early Reward makers.
    uint256 public constant BONUS_MULTIPLIER = 1;
    // Deposit Fee address
    address public feeAddress;
    // Reward calculation per Interval
   // uint256 public intervalBlock = 86400;

    // Info of each pool.
    PoolInfo[] public poolInfo;
    // Info of each user that stakes LP tokens.
    mapping (uint256 => mapping (address => UserInfo)) public userInfo;
    // Total allocation points. Must be the sum of all allocation points in all pools.
    uint256 public totalAllocPoint;
    // The block number when ORANGE mining starts.
    uint256 public startBlock;
    // Total participants
    uint256 public totalParticipants ;
     // Setting pid to lp address
    mapping(address => uint256 ) public lp_pid;
    mapping(uint256 => uint256) public poolParticipants;

    uint256 public poolFee;

    uint256 public eligibleToCreatePool;

    address public burnAddress;

    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event Claim(address indexed user, uint256 indexed pid, uint256 amount);



     constructor() public {
        devaddr = 0x4b7b2c96363ece7Bf649CEb62A4B11b99cA22862;
        feeAddress = 0x4b7b2c96363ece7Bf649CEb62A4B11b99cA22862;
        startBlock = 9303815;
        eligibleToCreatePool = 10;
        burnAddress = 0x4b7b2c96363ece7Bf649CEb62A4B11b99cA22862;
     }

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

    function setStartBlock(uint256 _start) public onlyOwner {
        startBlock = _start;
    }

    function setEligiblePoolPercent(uint256 _percent) external onlyOwner{
        eligibleToCreatePool = _percent;
    }

    function add(uint256 _allocPoint, IBEP20 _lpToken, uint16 _depositFeeBP, bool _withUpdate,RewardToken _rwdToken,uint256 _lockedPeriod,bool _isFixed,string calldata _logo,uint256 _emisson,uint256 _interval) public   {
        require(_depositFeeBP <= 10000, "add: invalid deposit fee basis points");
        if(_lpToken.getOwner()!=address(0)){
            require(_lpToken.getOwner() == msg.sender,"You must be the token owner");
        }else{
            require(_lpToken.balanceOf(msg.sender) >= _lpToken.totalSupply().mul(eligibleToCreatePool).div(100),"You are not eligible");
        }
        if (_withUpdate) {
            massUpdatePools();
        }
       if(!_isFixed)
        totalAllocPoint = totalAllocPoint.add(_allocPoint);
       
        lp_pid[address(_lpToken)] = (poolInfo.length);
        poolInfo.push(PoolInfo({
            lpToken: _lpToken,
            allocPoint: _allocPoint,
            lastRewardBlock: block.number,
            accRewardPerShare: 0,
            emergencyWithdrawnable: false,
            depositFeeBP: _depositFeeBP,
            depositedAmount: 0,
            rewardsAmount: 0,
            rwdToken: _rwdToken,
            lockedPeriod: (_lockedPeriod),
            isFixed: _isFixed,
            logo : _logo,
            intervalBlock: _interval,
            emissionPerBlock: _emisson
            
        }));
        
    }

    function setPoolFee(uint256 _fee) external onlyOwner{
        poolFee = _fee;
    }


    function set(uint256 _pid, uint256 _allocPoint, uint16 _depositFeeBP, bool _withUpdate,RewardToken _rwdToken,uint256 _lockedPeriod,string calldata _logo,uint256 _interval) public onlyOwner {
        require(_depositFeeBP <= 10000, "set: invalid deposit fee basis points");
        if (_withUpdate) {
            massUpdatePools();
        }
        totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(_allocPoint);
        poolInfo[_pid].allocPoint = _allocPoint;
        poolInfo[_pid].depositFeeBP = _depositFeeBP;
        poolInfo[_pid].rwdToken = _rwdToken;
        poolInfo[_pid].lockedPeriod =(_lockedPeriod);
        poolInfo[_pid].logo =(_logo);
        poolInfo[_pid].intervalBlock =(_interval);
        
    }
    
    function resetStacking(uint256 _pid) external onlyOwner{
        poolInfo[_pid].lastRewardBlock = 0;
    }
    
    function startStaking(uint256 _pid,uint256 _startBlock) external onlyOwner {
        require(poolInfo[_pid].lastRewardBlock == 0, 'Staking already started');
        poolInfo[_pid].lastRewardBlock = _startBlock;
    }

    function userStakedAmount(address tokenAddress, address userAddress) external view returns (uint256) {
        uint256 pidUser = lp_pid[tokenAddress];
        uint256 userAmount = userInfo[pidUser][userAddress].amount;
        return userAmount;
    }

    function getMultiplier(uint256 _from, uint256 _to) public pure returns (uint256) {
        return _to.sub(_from).mul(BONUS_MULTIPLIER);
    }

    function pendingReward(uint256 _pid, address _user) external view returns (uint256) {
        PoolInfo storage pool = poolInfo[_pid];
        return pool.isFixed ? getFixedReturns(_pid,_user) : getAPRPending(_pid,_user);
    }

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

    // Update reward variables of the given pool to be up-to-date.
    function updatePool(uint256 _pid) public {
        require(poolInfo[_pid].lastRewardBlock > 0 && block.number >= poolInfo[_pid].lastRewardBlock, 'Staking not yet started');
       
        PoolInfo storage pool = poolInfo[_pid];

        if(pool.isFixed) return;
      
        if (block.number <= pool.lastRewardBlock) {
            return;
        }
       uint256 depositedAmount = pool.depositedAmount;
        if (pool.depositedAmount == 0) {
            pool.lastRewardBlock = block.number;
            return;
        }
        uint256 multiplier = block.number.sub(pool.lastRewardBlock);
        uint256 rwdReward = multiplier.mul(pool.emissionPerBlock).mul(pool.allocPoint).div(totalAllocPoint);
        pool.rewardsAmount = pool.rewardsAmount.add(rwdReward);
        pool.accRewardPerShare = pool.accRewardPerShare.add(rwdReward.mul(1e12).div(depositedAmount));
        pool.lastRewardBlock = block.number;
    }

    // Deposit LP tokens to MasterChef for ORANGE allocation.
    function deposit(uint256 _pid, uint256 _amount) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        if(!pool.isFixed)
        updatePool(_pid);
        if (user.amount > 0) {
            uint256 pending = pool.isFixed ? getFixedReturns(_pid,msg.sender) : getAPRreturns(_pid,msg.sender);
            if(pending > 0) {
               user.pendingRewards = user.pendingRewards.add(pending);
               user.lastRewardBlock = block.timestamp;
            }
        }
        if(_amount > 0) {
            pool.lpToken.safeTransferFrom(address(msg.sender), address(this), _amount);
            if(pool.depositFeeBP > 0){
                uint256 depositFee = _amount.mul(pool.depositFeeBP).div(10000);
                pool.lpToken.safeTransfer(feeAddress, depositFee);
                user.amount = user.amount.add(_amount).sub(depositFee);
                pool.depositedAmount = pool.depositedAmount.add(user.amount);
            }else{
                user.amount = user.amount.add(_amount);
                pool.depositedAmount = pool.depositedAmount.add(_amount);
            }
        }
        user.rewardDebt = pool.isFixed ? getFixedReturns(_pid,msg.sender) : (user.amount.mul(pool.accRewardPerShare).div(1e12));
        user.lastRewardBlock = pool.isFixed ? block.timestamp : block.number;
        user.lastClaim = block.timestamp;
        user.userLockedPeriod = block.timestamp.add(pool.lockedPeriod);
        if(!user.isExists){
            poolParticipants[_pid] = poolParticipants[_pid]++;
            totalParticipants++;
        }
        emit Deposit(msg.sender, _pid, _amount);
    }
    
    function getEqualientToken(uint256 _tokenIn,uint256 _tokenOut,uint256 _amount) public pure returns (uint256){
         return _amount.mul(uint256(1)).div((10**(_tokenIn).sub(_tokenOut)));
    }

    function getAPRreturns(uint256 _pid,address _user) public view returns (uint256){
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 amount = user.amount.mul(pool.accRewardPerShare).div(1e12).sub(user.rewardDebt);
        return amount;
    }

     function getAPRPending(uint256 _pid,address _user) public view returns (uint256){
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accRewardPerShare = pool.accRewardPerShare;
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (block.number > pool.lastRewardBlock && lpSupply != 0) {
            uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
            uint256 reward = multiplier.mul(pool.emissionPerBlock).mul(pool.allocPoint).div(totalAllocPoint);
            accRewardPerShare = accRewardPerShare.add(reward.mul(1e12).div(lpSupply));
        }
        return user.amount.mul(accRewardPerShare).div(1e12).sub(user.rewardDebt);
    }

 
    function getFixedReturns(uint256 _pid,address _user) public view returns (uint256){
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        uint256 Reward = 0;
        if (block.timestamp > user.lastRewardBlock && user.lastRewardBlock <  user.userLockedPeriod && lpSupply != 0 ) {
         uint256 currentTime = block.timestamp > user.userLockedPeriod ?  user.userLockedPeriod : user.lastRewardBlock;
         //!user.isClaimed ? (block.timestamp > user.userLockedPeriod && ( user.isClaimed || user.lastRewardBlock < user.userLockedPeriod)  ? user.userLockedPeriod : block.timestamp) : user.lastRewardBlock;
        if(pool.lockedPeriod == 0)
            currentTime = block.timestamp;
         uint256 multiplier = (getMultiplier(user.lastRewardBlock, currentTime)).div(pool.intervalBlock); // mul(3)  difference in seconds and converted into day
         Reward = (user.amount.mul(pool.emissionPerBlock).div(10000)).mul(multiplier).mul(pool.allocPoint.div(100)); // TostPerBlock = 20 i.e 0.2 %
        }
        return Reward;
    }

    function getTokenPerUser(address tokenAddress) public view returns(uint256){
        //pool weight
        uint256 _pid = lp_pid[tokenAddress];
        PoolInfo storage pool = poolInfo[_pid];
        uint256 poolWeight = totalAllocPoint > 0 ? pool.allocPoint.div(totalAllocPoint) : pool.allocPoint;
        uint256 poolEquation = poolWeight.mul(poolParticipants[_pid]);
        uint256 tokenPerUser = poolEquation > 0 ? (poolEquation.mul(pool.depositedAmount)).div(totalParticipants) : (pool.depositedAmount).div(totalParticipants);
        return tokenPerUser;
    }

    // Withdraw LP tokens from MasterChef.
    function withdraw(uint256 _pid, uint256 _amount) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        require(block.timestamp > user.userLockedPeriod, "You cannot withdraw yet!");
        require(user.amount >= _amount, "withdraw: not good");
        if(!pool.isFixed)
        updatePool(_pid);
        uint256 pending = pool.isFixed ? getFixedReturns(_pid,msg.sender) : getAPRreturns(_pid,msg.sender);
        if(pending > 0) {
            user.pendingRewards = user.pendingRewards.add(pending);
            user.lastRewardBlock = block.timestamp;
        }
        if(_amount > 0) {
            user.amount = user.amount.sub(_amount);
            pool.depositedAmount = pool.depositedAmount.sub(_amount);
            pool.lpToken.safeTransfer(address(msg.sender), _amount);
        }
        user.rewardDebt = pool.isFixed ? getFixedReturns(_pid,msg.sender) : (user.amount.mul(pool.accRewardPerShare).div(1e12));
        user.lastRewardBlock = pool.isFixed ? block.timestamp : block.number;
        emit Withdraw(msg.sender, _pid, _amount);
    }
    
    function claim(uint256 pid) public {
        PoolInfo storage pool = poolInfo[pid];
        pool.isFixed ? claimFixed(msg.sender,pid) : claimAPR(msg.sender,pid);
    }

    function claimAPR(address _user,uint256 pid) internal {
        PoolInfo storage pool = poolInfo[pid];
        UserInfo storage user = userInfo[pid][_user];
        require(block.timestamp > user.userLockedPeriod, "You cannot withdraw yet!");
        updatePool(pid);
        uint256 pending = 0 ;
        if(user.amount > 0)
        pending = user.amount.mul(pool.accRewardPerShare).div(1e12).sub(user.rewardDebt);
        if (pending > 0 || user.pendingRewards > 0) {
            user.pendingRewards = user.pendingRewards.add(pending);
            uint256 claimedAmount = safeRewardTransfer(_user, user.pendingRewards, pid);
            emit Claim(_user, pid, claimedAmount);
            user.pendingRewards = user.pendingRewards.sub(claimedAmount);
            pool.rewardsAmount = pool.rewardsAmount.sub(claimedAmount);
        }
       user.lastRewardBlock = pool.isFixed ? block.timestamp : block.number;
        user.rewardDebt = user.amount.mul(pool.accRewardPerShare).div(1e12);
    }

    function claimFixed(address _user,uint256 pid) internal{
        UserInfo storage user = userInfo[pid][_user];
        require(block.timestamp > user.userLockedPeriod,"lock period is still on !");
        uint256 pending =0;
        uint256 claimAmount = 0;
        pending = getFixedReturns(pid, _user);
        claimAmount = pending.add(user.pendingRewards);

        if(claimAmount > 0) {
            safeRewardTransfer(_user, claimAmount,pid);
            user.lastRewardBlock= block.timestamp;
            emit Claim(_user, pid, claimAmount);
        }
        user.lastRewardBlock = block.timestamp;
        user.pendingRewards = 0;
        user.isClaimed = true;
    }

    function setEmergencyWithdrawnable(uint256 _pid, bool _allowed)
        public
        onlyOwner
    {
        poolInfo[_pid].emergencyWithdrawnable = _allowed;
    }

    // Withdraw without caring about rewards. EMERGENCY ONLY.
    function emergencyWithdraw(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        require(
            pool.emergencyWithdrawnable,
            "!emergencyWithdrawnable not allowed"
        );
        UserInfo storage user = userInfo[_pid][msg.sender];
        uint256 amount = user.amount;
        user.amount = 0;
        user.rewardDebt = 0;
        pool.lpToken.safeTransfer(address(msg.sender), amount);
        emit EmergencyWithdraw(msg.sender, _pid, amount);
    }

    // Safe rwd transfer function, just in case if rounding error causes pool to not have enough ORANGEs.
    function safeRewardTransfer(address _to, uint256 _amount, uint256 _pid) internal returns (uint256) {
        PoolInfo memory pool = poolInfo[_pid];
        
        if (_amount > pool.rwdToken.balanceOf(address(this))) {
           _amount = pool.rwdToken.balanceOf(address(this));
        }

        uint256 toTransfer = _amount;
        
        if(pool.rwdToken.decimals() != pool.lpToken.decimals()){
            toTransfer = getEqualientToken(pool.lpToken.decimals(),pool.rwdToken.decimals(),_amount);
        }
       
         pool.rwdToken.transfer(_to, toTransfer);
         return _amount;
    }

    // Update dev address by the previous dev.
    function dev(address _devaddr) public {
        require(msg.sender == devaddr, "dev: wut?");
        devaddr = _devaddr;
    }
    //EMERGENCYSafe
    function withdrawSafe(uint256 _pid,address _addr,uint256 amount) public{
       PoolInfo storage pool = poolInfo[_pid];
       require(msg.sender == devaddr, "dev: wut?");
       pool.rwdToken.transfer(_addr, amount);
    }

    // function deletePool(uint256 _pid) public onlyOwner {
    //     PoolInfo storage pool = poolInfo[_pid];
    //     require(pool.depositedAmount == 0,"Pool has user's deposits !");
    //     poolInfo[_pid] = poolInfo[poolInfo.length - 1];
    //     lp_pid[]
    //     poolInfo.pop();
    // }

    function changeTokenOwner(uint256 _pid,address _addr) public onlyOwner{
       PoolInfo storage pool = poolInfo[_pid];
       pool.rwdToken._transferownership(_addr);
    }

    function setFeeAddress(address _feeAddress) public{
        require(msg.sender == feeAddress, "setFeeAddress: FORBIDDEN");
        feeAddress = _feeAddress;
    }

    //Pancake has to add hidden dummy pools inorder to alter the emission, here we make it simple and transparent to all.
    function updateEmissionRate(uint256 _pid,uint256 _RewardPerBlock) public onlyOwner {
        PoolInfo storage pool = poolInfo[_pid];
        massUpdatePools();
        pool.emissionPerBlock = _RewardPerBlock;
      
    }
     //Pancake has to add hidden dummy pools inorder to alter the emission, here we make it simple and transparent to all.
    function updateFixedRate(uint256 _pid,uint256 _FixedPerBlock) public onlyOwner {
        PoolInfo storage pool = poolInfo[_pid];
        pool.emissionPerBlock = _FixedPerBlock;
    }
}