pragma solidity ^0.8.18;


// 
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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);

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

// 
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

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

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

// 
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with 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) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// 
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)
/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead 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, IERC20Metadata {
    mapping(address => uint256) private _balances;

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

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

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override 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 this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

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

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

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, 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}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, 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}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        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) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + 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) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This 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:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, 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:
     *
     * - `account` 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 += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(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);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(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 Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @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 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 {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);

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

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

    function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;

    function initialize(address, address) external;
}

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

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

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

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

    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}

// 
// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

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

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

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

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

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

    /**
     * @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 a - b;
    }

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

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

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

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

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * 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) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

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

// 
abstract contract Ownable is Context {
    address _owner;

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

    constructor(address _ownerAddress) {
        _transferOwnership(_ownerAddress);
    }

    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        _transferOwnership(newOwner);
    }

    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// 
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)
/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// 
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
/**
 * @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
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 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");

        (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 functionCallWithValue(target, data, 0, "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");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // 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
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// 
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)
/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

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

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

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

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

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

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

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

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

// 
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)
/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

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

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

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

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator,
        Rounding rounding
    ) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10**64) {
                value /= 10**64;
                result += 64;
            }
            if (value >= 10**32) {
                value /= 10**32;
                result += 32;
            }
            if (value >= 10**16) {
                value /= 10**16;
                result += 16;
            }
            if (value >= 10**8) {
                value /= 10**8;
                result += 8;
            }
            if (value >= 10**4) {
                value /= 10**4;
                result += 4;
            }
            if (value >= 10**2) {
                value /= 10**2;
                result += 2;
            }
            if (value >= 10**1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

// 
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)
/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}

// 
// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/ECDSA.sol)
/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV // Deprecated in v4.8
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// 
// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/EIP712.sol)
/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
 * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
 * they need in their contracts using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * _Available since v3.4._
 */
abstract contract EIP712 {
    /* solhint-disable var-name-mixedcase */
    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;
    uint256 private immutable _CACHED_CHAIN_ID;
    address private immutable _CACHED_THIS;

    bytes32 private immutable _HASHED_NAME;
    bytes32 private immutable _HASHED_VERSION;
    bytes32 private immutable _TYPE_HASH;

    /* solhint-enable var-name-mixedcase */

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    constructor(string memory name, string memory version) {
        bytes32 hashedName = keccak256(bytes(name));
        bytes32 hashedVersion = keccak256(bytes(version));
        bytes32 typeHash = keccak256(
            "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
        );
        _HASHED_NAME = hashedName;
        _HASHED_VERSION = hashedVersion;
        _CACHED_CHAIN_ID = block.chainid;
        _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
        _CACHED_THIS = address(this);
        _TYPE_HASH = typeHash;
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) {
            return _CACHED_DOMAIN_SEPARATOR;
        } else {
            return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
        }
    }

    function _buildDomainSeparator(
        bytes32 typeHash,
        bytes32 nameHash,
        bytes32 versionHash
    ) private view returns (bytes32) {
        return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
    }
}

// 
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

// 
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/extensions/draft-ERC20Permit.sol)
/**
 * @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * _Available since v3.4._
 */
abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 {
    using Counters for Counters.Counter;

    mapping(address => Counters.Counter) private _nonces;

    // solhint-disable-next-line var-name-mixedcase
    bytes32 private constant _PERMIT_TYPEHASH =
        keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    /**
     * @dev In previous versions `_PERMIT_TYPEHASH` was declared as `immutable`.
     * However, to ensure consistency with the upgradeable transpiler, we will continue
     * to reserve a slot.
     * @custom:oz-renamed-from _PERMIT_TYPEHASH
     */
    // solhint-disable-next-line var-name-mixedcase
    bytes32 private _PERMIT_TYPEHASH_DEPRECATED_SLOT;

    /**
     * @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`.
     *
     * It's a good idea to use the same `name` that is defined as the ERC20 token name.
     */
    constructor(string memory name) EIP712(name, "1") {}

    /**
     * @dev See {IERC20Permit-permit}.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual override {
        require(block.timestamp <= deadline, "ERC20Permit: expired deadline");

        bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));

        bytes32 hash = _hashTypedDataV4(structHash);

        address signer = ECDSA.recover(hash, v, r, s);
        require(signer == owner, "ERC20Permit: invalid signature");

        _approve(owner, spender, value);
    }

    /**
     * @dev See {IERC20Permit-nonces}.
     */
    function nonces(address owner) public view virtual override returns (uint256) {
        return _nonces[owner].current();
    }

    /**
     * @dev See {IERC20Permit-DOMAIN_SEPARATOR}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view override returns (bytes32) {
        return _domainSeparatorV4();
    }

    /**
     * @dev "Consume a nonce": return the current value and increment.
     *
     * _Available since v4.1._
     */
    function _useNonce(address owner) internal virtual returns (uint256 current) {
        Counters.Counter storage nonce = _nonces[owner];
        current = nonce.current();
        nonce.increment();
    }
}

// 
// OpenZeppelin Contracts (last updated v4.5.0) (governance/utils/IVotes.sol)
/**
 * @dev Common interface for {ERC20Votes}, {ERC721Votes}, and other {Votes}-enabled contracts.
 *
 * _Available since v4.5._
 */
interface IVotes {
    /**
     * @dev Emitted when an account changes their delegate.
     */
    event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);

    /**
     * @dev Emitted when a token transfer or delegate change results in changes to a delegate's number of votes.
     */
    event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance);

    /**
     * @dev Returns the current amount of votes that `account` has.
     */
    function getVotes(address account) external view returns (uint256);

    /**
     * @dev Returns the amount of votes that `account` had at the end of a past block (`blockNumber`).
     */
    function getPastVotes(address account, uint256 blockNumber) external view returns (uint256);

    /**
     * @dev Returns the total supply of votes available at the end of a past block (`blockNumber`).
     *
     * NOTE: This value is the sum of all available votes, which is not necessarily the sum of all delegated votes.
     * Votes that have not been delegated are still part of total supply, even though they would not participate in a
     * vote.
     */
    function getPastTotalSupply(uint256 blockNumber) external view returns (uint256);

    /**
     * @dev Returns the delegate that `account` has chosen.
     */
    function delegates(address account) external view returns (address);

    /**
     * @dev Delegates votes from the sender to `delegatee`.
     */
    function delegate(address delegatee) external;

    /**
     * @dev Delegates votes from signer to `delegatee`.
     */
    function delegateBySig(
        address delegatee,
        uint256 nonce,
        uint256 expiry,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;
}

// 
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.
/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such 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.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits");
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits");
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits");
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.2._
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits");
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits");
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits");
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits");
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits");
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits");
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits");
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits");
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits");
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits");
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits");
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v2.5._
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits");
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits");
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits");
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.2._
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits");
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits");
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits");
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v2.5._
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits");
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits");
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits");
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v2.5._
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits");
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v2.5._
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v2.5._
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     *
     * _Available since v3.0._
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 248 bits");
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 240 bits");
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 232 bits");
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.7._
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 224 bits");
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 216 bits");
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 208 bits");
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 200 bits");
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 192 bits");
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 184 bits");
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 176 bits");
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 168 bits");
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 160 bits");
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 152 bits");
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 144 bits");
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 136 bits");
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 128 bits");
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 120 bits");
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 112 bits");
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 104 bits");
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.7._
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 96 bits");
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 88 bits");
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 80 bits");
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 72 bits");
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 64 bits");
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 56 bits");
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 48 bits");
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 40 bits");
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 32 bits");
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 24 bits");
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 16 bits");
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 8 bits");
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     *
     * _Available since v3.0._
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

// 
// OpenZeppelin Contracts (last updated v4.8.1) (token/ERC20/extensions/ERC20Votes.sol)
/**
 * @dev Extension of ERC20 to support Compound-like voting and delegation. This version is more generic than Compound's,
 * and supports token supply up to 2^224^ - 1, while COMP is limited to 2^96^ - 1.
 *
 * NOTE: If exact COMP compatibility is required, use the {ERC20VotesComp} variant of this module.
 *
 * This extension keeps a history (checkpoints) of each account's vote power. Vote power can be delegated either
 * by calling the {delegate} function directly, or by providing a signature to be used with {delegateBySig}. Voting
 * power can be queried through the public accessors {getVotes} and {getPastVotes}.
 *
 * By default, token balance does not account for voting power. This makes transfers cheaper. The downside is that it
 * requires users to delegate to themselves in order to activate checkpoints and have their voting power tracked.
 *
 * _Available since v4.2._
 */
abstract contract ERC20Votes is IVotes, ERC20Permit {
    struct Checkpoint {
        uint32 fromBlock;
        uint224 votes;
    }

    bytes32 private constant _DELEGATION_TYPEHASH =
        keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");

    mapping(address => address) private _delegates;
    mapping(address => Checkpoint[]) private _checkpoints;
    Checkpoint[] private _totalSupplyCheckpoints;

    /**
     * @dev Get the `pos`-th checkpoint for `account`.
     */
    function checkpoints(address account, uint32 pos) public view virtual returns (Checkpoint memory) {
        return _checkpoints[account][pos];
    }

    /**
     * @dev Get number of checkpoints for `account`.
     */
    function numCheckpoints(address account) public view virtual returns (uint32) {
        return SafeCast.toUint32(_checkpoints[account].length);
    }

    /**
     * @dev Get the address `account` is currently delegating to.
     */
    function delegates(address account) public view virtual override returns (address) {
        return _delegates[account];
    }

    /**
     * @dev Gets the current votes balance for `account`
     */
    function getVotes(address account) public view virtual override returns (uint256) {
        uint256 pos = _checkpoints[account].length;
        return pos == 0 ? 0 : _checkpoints[account][pos - 1].votes;
    }

    /**
     * @dev Retrieve the number of votes for `account` at the end of `blockNumber`.
     *
     * Requirements:
     *
     * - `blockNumber` must have been already mined
     */
    function getPastVotes(address account, uint256 blockNumber) public view virtual override returns (uint256) {
        require(blockNumber < block.number, "ERC20Votes: block not yet mined");
        return _checkpointsLookup(_checkpoints[account], blockNumber);
    }

    /**
     * @dev Retrieve the `totalSupply` at the end of `blockNumber`. Note, this value is the sum of all balances.
     * It is but NOT the sum of all the delegated votes!
     *
     * Requirements:
     *
     * - `blockNumber` must have been already mined
     */
    function getPastTotalSupply(uint256 blockNumber) public view virtual override returns (uint256) {
        require(blockNumber < block.number, "ERC20Votes: block not yet mined");
        return _checkpointsLookup(_totalSupplyCheckpoints, blockNumber);
    }

    /**
     * @dev Lookup a value in a list of (sorted) checkpoints.
     */
    function _checkpointsLookup(Checkpoint[] storage ckpts, uint256 blockNumber) private view returns (uint256) {
        // We run a binary search to look for the earliest checkpoint taken after `blockNumber`.
        //
        // Initially we check if the block is recent to narrow the search range.
        // During the loop, the index of the wanted checkpoint remains in the range [low-1, high).
        // With each iteration, either `low` or `high` is moved towards the middle of the range to maintain the invariant.
        // - If the middle checkpoint is after `blockNumber`, we look in [low, mid)
        // - If the middle checkpoint is before or equal to `blockNumber`, we look in [mid+1, high)
        // Once we reach a single value (when low == high), we've found the right checkpoint at the index high-1, if not
        // out of bounds (in which case we're looking too far in the past and the result is 0).
        // Note that if the latest checkpoint available is exactly for `blockNumber`, we end up with an index that is
        // past the end of the array, so we technically don't find a checkpoint after `blockNumber`, but it works out
        // the same.
        uint256 length = ckpts.length;

        uint256 low = 0;
        uint256 high = length;

        if (length > 5) {
            uint256 mid = length - Math.sqrt(length);
            if (_unsafeAccess(ckpts, mid).fromBlock > blockNumber) {
                high = mid;
            } else {
                low = mid + 1;
            }
        }

        while (low < high) {
            uint256 mid = Math.average(low, high);
            if (_unsafeAccess(ckpts, mid).fromBlock > blockNumber) {
                high = mid;
            } else {
                low = mid + 1;
            }
        }

        return high == 0 ? 0 : _unsafeAccess(ckpts, high - 1).votes;
    }

    /**
     * @dev Delegate votes from the sender to `delegatee`.
     */
    function delegate(address delegatee) public virtual override {
        _delegate(_msgSender(), delegatee);
    }

    /**
     * @dev Delegates votes from signer to `delegatee`
     */
    function delegateBySig(
        address delegatee,
        uint256 nonce,
        uint256 expiry,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual override {
        require(block.timestamp <= expiry, "ERC20Votes: signature expired");
        address signer = ECDSA.recover(
            _hashTypedDataV4(keccak256(abi.encode(_DELEGATION_TYPEHASH, delegatee, nonce, expiry))),
            v,
            r,
            s
        );
        require(nonce == _useNonce(signer), "ERC20Votes: invalid nonce");
        _delegate(signer, delegatee);
    }

    /**
     * @dev Maximum token supply. Defaults to `type(uint224).max` (2^224^ - 1).
     */
    function _maxSupply() internal view virtual returns (uint224) {
        return type(uint224).max;
    }

    /**
     * @dev Snapshots the totalSupply after it has been increased.
     */
    function _mint(address account, uint256 amount) internal virtual override {
        super._mint(account, amount);
        require(totalSupply() <= _maxSupply(), "ERC20Votes: total supply risks overflowing votes");

        _writeCheckpoint(_totalSupplyCheckpoints, _add, amount);
    }

    /**
     * @dev Snapshots the totalSupply after it has been decreased.
     */
    function _burn(address account, uint256 amount) internal virtual override {
        super._burn(account, amount);

        _writeCheckpoint(_totalSupplyCheckpoints, _subtract, amount);
    }

    /**
     * @dev Move voting power when tokens are transferred.
     *
     * Emits a {IVotes-DelegateVotesChanged} event.
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override {
        super._afterTokenTransfer(from, to, amount);

        _moveVotingPower(delegates(from), delegates(to), amount);
    }

    /**
     * @dev Change delegation for `delegator` to `delegatee`.
     *
     * Emits events {IVotes-DelegateChanged} and {IVotes-DelegateVotesChanged}.
     */
    function _delegate(address delegator, address delegatee) internal virtual {
        address currentDelegate = delegates(delegator);
        uint256 delegatorBalance = balanceOf(delegator);
        _delegates[delegator] = delegatee;

        emit DelegateChanged(delegator, currentDelegate, delegatee);

        _moveVotingPower(currentDelegate, delegatee, delegatorBalance);
    }

    function _moveVotingPower(
        address src,
        address dst,
        uint256 amount
    ) private {
        if (src != dst && amount > 0) {
            if (src != address(0)) {
                (uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[src], _subtract, amount);
                emit DelegateVotesChanged(src, oldWeight, newWeight);
            }

            if (dst != address(0)) {
                (uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[dst], _add, amount);
                emit DelegateVotesChanged(dst, oldWeight, newWeight);
            }
        }
    }

    function _writeCheckpoint(
        Checkpoint[] storage ckpts,
        function(uint256, uint256) view returns (uint256) op,
        uint256 delta
    ) private returns (uint256 oldWeight, uint256 newWeight) {
        uint256 pos = ckpts.length;

        Checkpoint memory oldCkpt = pos == 0 ? Checkpoint(0, 0) : _unsafeAccess(ckpts, pos - 1);

        oldWeight = oldCkpt.votes;
        newWeight = op(oldWeight, delta);

        if (pos > 0 && oldCkpt.fromBlock == block.number) {
            _unsafeAccess(ckpts, pos - 1).votes = SafeCast.toUint224(newWeight);
        } else {
            ckpts.push(Checkpoint({fromBlock: SafeCast.toUint32(block.number), votes: SafeCast.toUint224(newWeight)}));
        }
    }

    function _add(uint256 a, uint256 b) private pure returns (uint256) {
        return a + b;
    }

    function _subtract(uint256 a, uint256 b) private pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Access an element of the array without performing bounds check. The position is assumed to be within bounds.
     */
    function _unsafeAccess(Checkpoint[] storage ckpts, uint256 pos) private pure returns (Checkpoint storage result) {
        assembly {
            mstore(0, ckpts.slot)
            result.slot := add(keccak256(0, 0x20), pos)
        }
    }
}

// 
abstract contract ERC20Decimals is ERC20 {
    uint8 private immutable _decimals;

    constructor(uint8 decimals_) {
        _decimals = decimals_;
    }

    function decimals() public view virtual override returns (uint8) {
        return _decimals;
    }
}

abstract contract ERC20VotesDecimals is ERC20Votes {
    uint8 private immutable _decimals;

    constructor(uint8 decimals_) {
        _decimals = decimals_;
    }

    function decimals() public view virtual override returns (uint8) {
        return _decimals;
    }

    function _afterTokenTransfer(
        address _from,
        address _to,
        uint256 _amount
    ) internal virtual override {
        ERC20Votes._afterTokenTransfer(_from, _to, _amount);
    }
}

// 
struct ShareHolder {
    uint256 shares;
    uint256 rewardDebt;
    uint256 claimed;
    uint256 pending;
}

struct TaxInfo {
    uint64 charity;
    uint64 autoLiquidity;
    uint64 marketing;
    uint64 reflection;
}

struct DividendConstructorArgs {
    address uniswapFactory;
    IUniswapV2Router02 uniswapV2Router;
    address mainLPToken;
    address charityAddress;
    address marketingAddress;
    address autoLiquidityAddress;
    TaxInfo transferTaxInfo;
    TaxInfo buyTaxInfo;
    TaxInfo sellTaxInfo;
    bool swapTaxes;
    uint256 minShareForRewards;
    bool sameTokenForRewards;
}

contract ERC20TempHolder {
    address immutable owner;

    constructor() {
        owner = msg.sender;
    }

    function transfer(address token, address to, uint256 amount) external {
        require(msg.sender == owner, "Only owner");
        IERC20(token).transfer(to, amount);
    }
}

abstract contract DividendsTokenCustom is ERC20Decimals, Ownable {
    /*  Universal distributor */
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    uint256 public minShareForRewards;

    uint256 public maxAutoProcessGas = 500000;

    bool public autoDistribute = true;

    uint256 public accPerShare; // Accumulated per share, times 1e36.
    uint256 public totalShares; // total number of shares
    uint256 public totalClaimed; // total amount claimed
    uint256 public totalRewardsDebt; // total amount claimed

    // use getShare-holderInfo function to get this data
    mapping(address => ShareHolder) shareHolders;
    address[] public allShareHolders;
    mapping(address => uint256) public indexOfShareHolders;

    uint256 private _lastProccessedIndex = 1;

    mapping(address => bool) public excludedFromRewards;

    // events
    event Claimed(address indexed claimer, uint256 indexed amount);
    event RewardsAdded(uint256 indexed amount);

    event ShareUpdated(
        address indexed shareHolder,
        uint256 indexed sharesAmount
    );
    event IncludedInRewards(address indexed shareHolder);
    event ExcludedFromRewards(address indexed shareHolder);

    address public immutable weth;
    address public immutable rewardToken;
    bool immutable isWethRewardToken;

    /** */

    uint256 public constant PERCENT_DENOMINATOR = 1000;
    uint256 public constant MAX_TAX = 200; // 20%

    IUniswapV2Router02 public immutable uniswapV2Router;
    address public immutable uniswapV2Pair;
    address public immutable wrappedNativeAddress;
    address public immutable mainLPToken;
    ERC20TempHolder public immutable tempHolder = new ERC20TempHolder();
    bool public immutable sameTokenForRewards;

    address public charityAddress;
    address public marketingAddress;
    address public autoLiquidityAddress;

    TaxInfo public transferTax;
    TaxInfo public buyTax;
    TaxInfo public sellTax;

    bool public isTaxActive;
    bool public swapAndLiquifyActive = true;

    uint256 public minTokensBeforeSwap; // 1 token

    mapping(address => bool) public isExcludedFromFee;

    mapping(address => bool) public isPair;

    uint256 public charityReserves;
    uint256 public marketingReserves;
    uint256 public autoLiquidityReserves;
    uint256 public reflectionReserves;

    bool public swapTaxes;

    function setSwapTaxes(bool _swapTaxes) external onlyOwner {
        swapTaxes = _swapTaxes;
    }

    constructor(DividendConstructorArgs memory _args) {
        minTokensBeforeSwap = (1 * 10) ** (decimals() - 1);
        uniswapV2Router = _args.uniswapV2Router;
        address __weth = _args.uniswapV2Router.WETH();
        wrappedNativeAddress = __weth;
        uniswapV2Pair = IUniswapV2Factory(_args.uniswapFactory).createPair(
            address(this),
            _args.mainLPToken
        );
        isPair[uniswapV2Pair] = true;

        mainLPToken = _args.mainLPToken;

        allShareHolders.push(address(0)); // use the index zero for address zero

        weth = __weth;
        rewardToken = _args.sameTokenForRewards
            ? address(this)
            : _args.mainLPToken;
        isWethRewardToken =
            !_args.sameTokenForRewards &&
            __weth == _args.mainLPToken;

        charityAddress = _args.charityAddress;
        marketingAddress = _args.marketingAddress;
        autoLiquidityAddress = _args.autoLiquidityAddress;

        isExcludedFromFee[owner()] = true;
        isExcludedFromFee[address(this)] = true;
        isExcludedFromFee[charityAddress] = true;
        isExcludedFromFee[marketingAddress] = true;
        isExcludedFromFee[address(tempHolder)] = true;

        transferTax = _args.transferTaxInfo;
        buyTax = _args.buyTaxInfo;
        sellTax = _args.sellTaxInfo;

        excludedFromRewards[uniswapV2Pair] = true;
        excludedFromRewards[address(this)] = true;
        excludedFromRewards[address(_args.uniswapV2Router)] = true;
        excludedFromRewards[address(tempHolder)] = true;
        excludedFromRewards[owner()] = true;

        // approve max uint for router
        _approve(address(this), address(uniswapV2Router), type(uint256).max);
        // approve max int mainLPToken for router
        IERC20(_args.mainLPToken).approve(
            address(uniswapV2Router),
            type(uint256).max
        );

        swapTaxes = _args.swapTaxes;

        minShareForRewards = _args.minShareForRewards;
        sameTokenForRewards = _args.sameTokenForRewards;
    }

    function transfer(
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _customTransfer(_msgSender(), recipient, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        require(
            amount <= allowance(sender, _msgSender()),
            "Transfer amount exceeds allowance"
        );

        _customTransfer(sender, recipient, amount);

        unchecked {
            _approve(
                sender,
                _msgSender(),
                allowance(sender, _msgSender()) - amount
            );
        }
        return true;
    }

    bool inSwap = false;

    function _customTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        if (from == address(this) || to == address(this)) {
            _transfer(from, to, amount);
            return;
        }
        // TODO: implement taxes
        if (from != uniswapV2Pair && swapAndLiquifyActive) {
            processReserves();
        }

        // if excluded then do normal transfer
        if (
            !isTaxActive ||
            inSwap ||
            isExcludedFromFee[from] ||
            isExcludedFromFee[to] ||
            amount == 0
        ) {
            _transfer(from, to, amount);
            return;
        }
        // if not excluded then apply tax
        TaxInfo memory taxInfo;
        uint64 totalTax;
        uint256 taxAmount;
        if (!isPair[from] && !isPair[to]) {
            taxInfo = transferTax;
        } else if (isPair[from] && !isPair[to]) {
            taxInfo = buyTax;
        } else {
            taxInfo = sellTax;
        }

        unchecked {
            totalTax =
                taxInfo.charity +
                taxInfo.autoLiquidity +
                taxInfo.marketing +
                taxInfo.reflection;
            taxAmount = (amount * totalTax) / PERCENT_DENOMINATOR;
        }

        _transfer(from, address(this), taxAmount);
        _transfer(from, to, amount - taxAmount);

        unchecked {
            // charity
            charityReserves += (taxAmount * taxInfo.charity) / totalTax;
            // auto liquidity
            autoLiquidityReserves +=
                (taxAmount * taxInfo.autoLiquidity) /
                totalTax;
            // marketing
            marketingReserves += (taxAmount * taxInfo.marketing) / totalTax;
            // reflection
            reflectionReserves += (taxAmount * taxInfo.reflection) / totalTax;
        }
    }

    // setters
    function setCharityAddress(address _charityAddress) external onlyOwner {
        charityAddress = _charityAddress;
    }

    function setMarketingAddress(address _marketingAddress) external onlyOwner {
        marketingAddress = _marketingAddress;
    }

    function setAutoLiquidityAddress(
        address _autoLiquidityAddress
    ) external onlyOwner {
        autoLiquidityAddress = _autoLiquidityAddress;
    }

    function setTransferTax(
        uint64 _charity,
        uint64 _autoLiquidity,
        uint64 _marketing,
        uint64 _holdersRewards
    ) external onlyOwner {
        require(
            _charity + _autoLiquidity + _marketing + _holdersRewards <= MAX_TAX,
            "Transfer tax too high"
        );
        transferTax = TaxInfo(
            _charity,
            _autoLiquidity,
            _marketing,
            _holdersRewards
        );
    }

    function setBuyTax(
        uint64 _charity,
        uint64 _autoLiquidity,
        uint64 _marketing,
        uint64 _holdersRewards
    ) external onlyOwner {
        require(
            _charity + _autoLiquidity + _marketing + _holdersRewards <= MAX_TAX,
            "Buy tax too high"
        );
        buyTax = TaxInfo(_charity, _autoLiquidity, _marketing, _holdersRewards);
    }

    function setSellTax(
        uint64 _charity,
        uint64 _autoLiquidity,
        uint64 _marketing,
        uint64 _holdersRewards
    ) external onlyOwner {
        require(
            _charity + _autoLiquidity + _marketing + _holdersRewards <= MAX_TAX,
            "Sell tax too high"
        );
        sellTax = TaxInfo(
            _charity,
            _autoLiquidity,
            _marketing,
            _holdersRewards
        );
    }

    function setExcludedFromFee(
        address account,
        bool excluded
    ) external onlyOwner {
        isExcludedFromFee[account] = excluded;
    }

    function setPair(address pair, bool value) external onlyOwner {
        require(pair != uniswapV2Pair, "Cannot change pair");
        isPair[pair] = value;
    }

    function setTaxActive(bool value) external onlyOwner {
        isTaxActive = value;
    }

    function setSwapAndLiquifyActive(
        bool _swapAndLiquifyActive
    ) external onlyOwner {
        swapAndLiquifyActive = _swapAndLiquifyActive;
    }

    function setMinTokensBeforeSwap(
        uint256 _minTokensBeforeSwap
    ) external onlyOwner {
        minTokensBeforeSwap = _minTokensBeforeSwap;
    }

    function processReserves() public {
        if (inSwap) return;
        inSwap = true;

        if (
            charityReserves > minTokensBeforeSwap &&
            charityAddress != address(0)
        ) {
            if (swapTaxes) {
                if (mainLPToken == wrappedNativeAddress) {
                    swapForETH(charityReserves, charityAddress);
                } else {
                    swapForERC20(charityReserves, charityAddress);
                }
            } else _transfer(address(this), charityAddress, charityReserves);
            delete charityReserves;
        }

        if (marketingReserves > minTokensBeforeSwap) {
            if (swapTaxes) {
                if (mainLPToken == wrappedNativeAddress) {
                    swapForETH(marketingReserves, marketingAddress);
                } else {
                    swapForERC20(marketingReserves, marketingAddress);
                }
            } else
                _transfer(address(this), marketingAddress, marketingReserves);
            delete marketingReserves;
        }

        if (reflectionReserves > minTokensBeforeSwap && !sameTokenForRewards) {
            if (mainLPToken == wrappedNativeAddress) {
                uint256 initialBalance = address(this).balance;

                swapForETH(reflectionReserves, address(this));

                uint256 balanceAfter = address(this).balance - initialBalance;

                _updateGlobalShares(balanceAfter);
            } else {
                swapForERC20(reflectionReserves, address(tempHolder));

                uint256 balanceAfter = IERC20(mainLPToken).balanceOf(
                    address(tempHolder)
                );

                tempHolder.transfer(mainLPToken, address(this), balanceAfter);

                _updateGlobalShares(balanceAfter);
            }

            delete reflectionReserves;
        } else if (sameTokenForRewards) {
            _updateGlobalShares(reflectionReserves);
            delete reflectionReserves;
        }

        if (
            autoLiquidityReserves > minTokensBeforeSwap &&
            autoLiquidityAddress != address(0)
        ) {
            autoLiquidityReserves = swapAndLiquify(autoLiquidityReserves);
        }

        inSwap = false;
    }

    function swapAndLiquify(uint256 _amount) internal returns (uint256) {
        uint256 half = _amount / 2;
        uint256 otherHalf = _amount - half;
        uint256 leftOver;
        if (mainLPToken == wrappedNativeAddress) {
            uint256 initialBalance = address(this).balance;

            swapForETH(half, address(this));

            uint256 newBalance = address(this).balance - initialBalance;

            (uint amountToken, , ) = addLiquidityETH(otherHalf, newBalance);

            leftOver = otherHalf - amountToken;
        } else {
            swapForERC20(half, address(tempHolder));

            uint256 newBalance = IERC20(mainLPToken).balanceOf(
                address(tempHolder)
            );

            tempHolder.transfer(mainLPToken, address(this), newBalance);

            (uint amountToken, , ) = addLiquidityERC20(otherHalf, newBalance);

            leftOver = otherHalf - amountToken;
        }

        return leftOver;
    }

    function addLiquidityETH(
        uint256 _tokenAmount,
        uint256 _NativeAmount
    ) private returns (uint, uint, uint) {
        return
            uniswapV2Router.addLiquidityETH{value: _NativeAmount}(
                address(this),
                _tokenAmount,
                0,
                0,
                autoLiquidityAddress,
                block.timestamp
            );
    }

    function addLiquidityERC20(
        uint256 _tokenAmount,
        uint256 _counterPartAmount
    ) private returns (uint, uint, uint) {
        return
            uniswapV2Router.addLiquidity(
                address(this),
                mainLPToken,
                _tokenAmount,
                _counterPartAmount,
                0,
                0,
                autoLiquidityAddress,
                block.timestamp
            );
    }

    function swapForETH(uint256 _amount, address _to) internal {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = wrappedNativeAddress;
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            _amount,
            0,
            path,
            _to,
            block.timestamp
        );
    }

    function swapForERC20(uint256 _amount, address _to) internal {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = mainLPToken;
        uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
            _amount,
            0,
            path,
            _to,
            block.timestamp
        );
    }

    receive() external payable {
        // only receive from router
        require(msg.sender == address(uniswapV2Router), "Invalid sender");
    }

    function _afterTokenTransfer(
        address from_,
        address to_,
        uint256
    ) internal virtual override {
        _updateShare(from_);
        _updateShare(to_);
        if (!inSwap) _massProcess();
    }

    function _massProcess() internal {
        if (autoDistribute)
            batchProcessClaims(
                gasleft() > maxAutoProcessGas
                    ? maxAutoProcessGas
                    : (gasleft() * 80) / 100
            );
    }

    function _updateShare(address wallet) internal {
        if (!excludedFromRewards[wallet])
            _setShare(
                wallet,
                balanceOf(wallet) > minShareForRewards ? balanceOf(wallet) : 0
            );
    }

    function includeInRewards(
        address shareHolderToBeIncluded_
    ) external onlyOwner {
        require(
            excludedFromRewards[shareHolderToBeIncluded_],
            "HODLRewardsDistributor: not excluded"
        );

        _updateUserShares(
            shareHolderToBeIncluded_,
            balanceOf(shareHolderToBeIncluded_)
        );
        excludedFromRewards[shareHolderToBeIncluded_] = false;
        emit IncludedInRewards(shareHolderToBeIncluded_);
    }

    function setProcessingGasLimit(uint256 maxAmount_) external onlyOwner {
        maxAutoProcessGas = maxAmount_;
    }

    function setMinSharePerRewards(
        uint256 _minSharePerRewards
    ) external onlyOwner {
        minShareForRewards = _minSharePerRewards;
    }

    function setAutoDistribute(bool _autoDistribute) external onlyOwner {
        autoDistribute = _autoDistribute;
    }

    /**
        retruns the pending rewards amount
        */
    function pending(
        address sharholderAddress_
    ) public view returns (uint256 pendingAmount) {
        ShareHolder storage user = shareHolders[sharholderAddress_];
        pendingAmount = user.shares.mul(accPerShare).div(1e36).sub(
            user.rewardDebt
        );
    }

    function totalPending() public view returns (uint256) {
        return accPerShare.mul(totalShares).div(1e36).sub(totalRewardsDebt);
    }

    /**
        returns information about the share holder
        */
    function shareHolderInfo(
        address shareHoldr_
    ) external view returns (ShareHolder memory) {
        ShareHolder storage user = shareHolders[shareHoldr_];
        return
            ShareHolder(
                user.shares, // How many tokens the user is holding.
                user.rewardDebt, // see @masterChef contract for more details
                user.claimed,
                pending(shareHoldr_)
            );
    }

    function holders() external view returns (uint256) {
        return allShareHolders.length;
    }

    function _setShare(address sharholderAddress_, uint256 amount_) internal {
        ShareHolder storage user = shareHolders[sharholderAddress_];

        // pay any pending rewards
        if (user.shares > 0) claimPending(sharholderAddress_);
        // update total shares
        _updateUserShares(sharholderAddress_, amount_);
    }

    /*
        excludes shareHolderToBeExcluded_ from participating in rewards
        Will distribute what ever pending rewards he has to all other shareholders
        This is needed in case a contract that can't claim needs to be excluded
        If owner wants the excluded to receive their pending rewards he can call claimPending on their behalf before calling this function
    */
    function excludeFromRewards(
        address shareHolderToBeExcluded_
    ) external onlyOwner {
        _excludeFromRewards(shareHolderToBeExcluded_);
    }

    function _excludeFromRewards(address shareHolderToBeExcluded_) internal {
        if (excludedFromRewards[shareHolderToBeExcluded_]) return;

        uint256 amountPending = pending(shareHolderToBeExcluded_);
        // update this user's shares to 0
        _updateUserShares(shareHolderToBeExcluded_, 0);
        // distribute his pending share to all shareholders
        if (amountPending > 0) _updateGlobalShares(amountPending);
        excludedFromRewards[shareHolderToBeExcluded_] = true;
        emit ExcludedFromRewards(shareHolderToBeExcluded_);
    }

    /** 
        @dev
        claim pending rewards for sharholderAddress_
        can be called by anyone but only sharholderAddress_
        can receive the reward
    */
    function claimPending(address sharholderAddress_) public {
        ShareHolder storage user = shareHolders[sharholderAddress_];

        uint256 pendingAmount = user.shares.mul(accPerShare).div(1e36).sub(
            user.rewardDebt
        );

        if (pendingAmount <= 0) return;

        totalRewardsDebt = totalRewardsDebt.sub(user.rewardDebt);
        user.rewardDebt = user.shares.mul(accPerShare).div(1e36);
        totalRewardsDebt = totalRewardsDebt.add(user.rewardDebt);

        bool sent;

        if (isWethRewardToken) {
            (sent, ) = payable(sharholderAddress_).call{value: pendingAmount}(
                ""
            );
            //if !sent means probably the receiver is a non payable address
            if (!sent) {
                // add pending amount to global shares to prevent loss of ETH
                _updateGlobalShares(pendingAmount);
            }
        } else {
            IERC20(rewardToken).transfer(sharholderAddress_, pendingAmount);
            sent = true;
        }

        if (sent) {
            emit Claimed(sharholderAddress_, pendingAmount);
            user.claimed = user.claimed.add(pendingAmount);
            totalClaimed = totalClaimed.add(pendingAmount);
        }
    }

    bool private _inBatchProcess;

    function batchProcessClaims(uint256 gas) public {
        if (gasleft() < gas || _inBatchProcess) return;
        _inBatchProcess = true;
        uint256 gasUsed = 0;
        uint256 gasLeft = gasleft();
        uint256 iterations = 1; // index 0 is ocupied by address(0)
        uint256 index = _lastProccessedIndex;
        // we
        while (gasUsed < gas && iterations < allShareHolders.length) {
            claimPending(allShareHolders[index]);
            gasUsed = gasUsed.add(gasLeft.sub(gasleft()));
            gasLeft = gasleft();
            index = _incrementLastProccessed(index);
            iterations++;
        }

        _lastProccessedIndex = index;

        _inBatchProcess = false;
    }

    /**
        updates the accumulatedPerShare amount based on the new amount and total shares
        */
    uint256 reserved = 0;

    function _updateGlobalShares(uint256 amount_) internal {
        if (totalShares == 0) {
            reserved = reserved.add(amount_);
            return;
        }
        accPerShare = accPerShare.add(amount_.mul(1e36).div(totalShares)).add(
            reserved.mul(1e36).div(totalShares)
        );
        reserved = 0;
        emit RewardsAdded(amount_);
    }

    function updateGlobalShares(uint256 amount_) external onlyOwner {
        _updateGlobalShares(amount_);
    }

    /**
        updates a user share
    */
    function _updateUserShares(
        address sharholderAddress_,
        uint256 newAmount_
    ) internal {
        ShareHolder storage user = shareHolders[sharholderAddress_];
        totalShares = totalShares.sub(user.shares).add(newAmount_);
        totalRewardsDebt = totalRewardsDebt.sub(user.rewardDebt);
        user.shares = newAmount_;
        user.rewardDebt = user.shares.mul(accPerShare).div(1e36);
        totalRewardsDebt = totalRewardsDebt.add(user.rewardDebt);
        if (user.shares > 0 && indexOfShareHolders[sharholderAddress_] == 0) {
            // add this shareHolder to array
            allShareHolders.push(sharholderAddress_);

            indexOfShareHolders[sharholderAddress_] =
                allShareHolders.length -
                1;
        } else if (
            user.shares == 0 && indexOfShareHolders[sharholderAddress_] != 0
        ) {
            // remove this share holder from array
            uint256 index = indexOfShareHolders[sharholderAddress_];

            allShareHolders[index] = allShareHolders[
                allShareHolders.length - 1
            ];

            indexOfShareHolders[
                allShareHolders[allShareHolders.length - 1]
            ] = index;

            allShareHolders.pop();

            indexOfShareHolders[sharholderAddress_] = 0;
        }
        emit ShareUpdated(sharholderAddress_, newAmount_);
    }

    function _incrementLastProccessed(
        uint256 _index
    ) internal view returns (uint256) {
        _index++;
        if (_index >= allShareHolders.length) _index = 1;

        return _index;
    }
}

abstract contract DividendsTokenCustomVotes is ERC20VotesDecimals, Ownable {
    /*  Universal distributor */
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    uint256 public minShareForRewards;

    uint256 public maxAutoProcessGas = 500000;

    bool public autoDistribute = true;

    uint256 public accPerShare; // Accumulated per share, times 1e36.
    uint256 public totalShares; // total number of shares
    uint256 public totalClaimed; // total amount claimed
    uint256 public totalRewardsDebt; // total amount claimed

    // use getShare-holderInfo function to get this data
    mapping(address => ShareHolder) shareHolders;
    address[] public allShareHolders;
    mapping(address => uint256) public indexOfShareHolders;

    uint256 private _lastProccessedIndex = 1;

    mapping(address => bool) public excludedFromRewards;

    // events
    event Claimed(address indexed claimer, uint256 indexed amount);
    event RewardsAdded(uint256 indexed amount);

    event ShareUpdated(
        address indexed shareHolder,
        uint256 indexed sharesAmount
    );
    event IncludedInRewards(address indexed shareHolder);
    event ExcludedFromRewards(address indexed shareHolder);

    address public immutable weth;
    address public immutable rewardToken;
    bool immutable isWethRewardToken;

    /** */

    uint256 public constant PERCENT_DENOMINATOR = 1000;
    uint256 public constant MAX_TAX = 200; // 20%

    IUniswapV2Router02 public immutable uniswapV2Router;
    address public immutable uniswapV2Pair;
    address public immutable wrappedNativeAddress;
    address public immutable mainLPToken;
    ERC20TempHolder public immutable tempHolder = new ERC20TempHolder();
    bool public immutable sameTokenForRewards;

    address public charityAddress;
    address public marketingAddress;
    address public autoLiquidityAddress;

    TaxInfo public transferTax;
    TaxInfo public buyTax;
    TaxInfo public sellTax;

    bool public isTaxActive;
    bool public swapAndLiquifyActive = true;

    uint256 public minTokensBeforeSwap; // 1 token

    mapping(address => bool) public isExcludedFromFee;

    mapping(address => bool) public isPair;

    uint256 public charityReserves;
    uint256 public marketingReserves;
    uint256 public autoLiquidityReserves;
    uint256 public reflectionReserves;

    bool public swapTaxes;

    function setSwapTaxes(bool _swapTaxes) external onlyOwner {
        swapTaxes = _swapTaxes;
    }

    constructor(DividendConstructorArgs memory _args) {
        minTokensBeforeSwap = (1 * 10) ** (decimals() - 1);
        uniswapV2Router = _args.uniswapV2Router;
        address __weth = _args.uniswapV2Router.WETH();
        wrappedNativeAddress = __weth;
        uniswapV2Pair = IUniswapV2Factory(_args.uniswapFactory).createPair(
            address(this),
            _args.mainLPToken
        );
        isPair[uniswapV2Pair] = true;

        mainLPToken = _args.mainLPToken;

        allShareHolders.push(address(0)); // use the index zero for address zero

        weth = __weth;
        rewardToken = _args.sameTokenForRewards
            ? address(this)
            : _args.mainLPToken;
        isWethRewardToken =
            !_args.sameTokenForRewards &&
            __weth == _args.mainLPToken;

        charityAddress = _args.charityAddress;
        marketingAddress = _args.marketingAddress;
        autoLiquidityAddress = _args.autoLiquidityAddress;

        isExcludedFromFee[owner()] = true;
        isExcludedFromFee[address(this)] = true;
        isExcludedFromFee[charityAddress] = true;
        isExcludedFromFee[marketingAddress] = true;
        isExcludedFromFee[address(tempHolder)] = true;

        transferTax = _args.transferTaxInfo;
        buyTax = _args.buyTaxInfo;
        sellTax = _args.sellTaxInfo;

        excludedFromRewards[uniswapV2Pair] = true;
        excludedFromRewards[address(this)] = true;
        excludedFromRewards[address(_args.uniswapV2Router)] = true;
        excludedFromRewards[address(tempHolder)] = true;
        excludedFromRewards[owner()] = true;

        // approve max uint for router
        _approve(address(this), address(uniswapV2Router), type(uint256).max);
        // approve max int mainLPToken for router
        IERC20(_args.mainLPToken).approve(
            address(uniswapV2Router),
            type(uint256).max
        );

        swapTaxes = _args.swapTaxes;

        minShareForRewards = _args.minShareForRewards;
        sameTokenForRewards = _args.sameTokenForRewards;
    }

    function transfer(
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _customTransfer(_msgSender(), recipient, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        require(
            amount <= allowance(sender, _msgSender()),
            "Transfer amount exceeds allowance"
        );

        _customTransfer(sender, recipient, amount);

        unchecked {
            _approve(
                sender,
                _msgSender(),
                allowance(sender, _msgSender()) - amount
            );
        }
        return true;
    }

    bool inSwap = false;

    function _customTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        if (from == address(this) || to == address(this)) {
            _transfer(from, to, amount);
            return;
        }
        // TODO: implement taxes
        if (from != uniswapV2Pair && swapAndLiquifyActive) {
            processReserves();
        }

        // if excluded then do normal transfer
        if (
            !isTaxActive ||
            inSwap ||
            isExcludedFromFee[from] ||
            isExcludedFromFee[to] ||
            amount == 0
        ) {
            _transfer(from, to, amount);
            return;
        }
        // if not excluded then apply tax
        TaxInfo memory taxInfo;
        uint64 totalTax;
        uint256 taxAmount;
        if (!isPair[from] && !isPair[to]) {
            taxInfo = transferTax;
        } else if (isPair[from] && !isPair[to]) {
            taxInfo = buyTax;
        } else {
            taxInfo = sellTax;
        }

        unchecked {
            totalTax =
                taxInfo.charity +
                taxInfo.autoLiquidity +
                taxInfo.marketing +
                taxInfo.reflection;
            taxAmount = (amount * totalTax) / PERCENT_DENOMINATOR;
        }

        _transfer(from, address(this), taxAmount);
        _transfer(from, to, amount - taxAmount);

        unchecked {
            // charity
            charityReserves += (taxAmount * taxInfo.charity) / totalTax;
            // auto liquidity
            autoLiquidityReserves +=
                (taxAmount * taxInfo.autoLiquidity) /
                totalTax;
            // marketing
            marketingReserves += (taxAmount * taxInfo.marketing) / totalTax;
            // reflection
            reflectionReserves += (taxAmount * taxInfo.reflection) / totalTax;
        }
    }

    // setters
    function setCharityAddress(address _charityAddress) external onlyOwner {
        charityAddress = _charityAddress;
    }

    function setMarketingAddress(address _marketingAddress) external onlyOwner {
        marketingAddress = _marketingAddress;
    }

    function setAutoLiquidityAddress(
        address _autoLiquidityAddress
    ) external onlyOwner {
        autoLiquidityAddress = _autoLiquidityAddress;
    }

    function setTransferTax(
        uint64 _charity,
        uint64 _autoLiquidity,
        uint64 _marketing,
        uint64 _holdersRewards
    ) external onlyOwner {
        require(
            _charity + _autoLiquidity + _marketing + _holdersRewards <= MAX_TAX,
            "Transfer tax too high"
        );
        transferTax = TaxInfo(
            _charity,
            _autoLiquidity,
            _marketing,
            _holdersRewards
        );
    }

    function setBuyTax(
        uint64 _charity,
        uint64 _autoLiquidity,
        uint64 _marketing,
        uint64 _holdersRewards
    ) external onlyOwner {
        require(
            _charity + _autoLiquidity + _marketing + _holdersRewards <= MAX_TAX,
            "Buy tax too high"
        );
        buyTax = TaxInfo(_charity, _autoLiquidity, _marketing, _holdersRewards);
    }

    function setSellTax(
        uint64 _charity,
        uint64 _autoLiquidity,
        uint64 _marketing,
        uint64 _holdersRewards
    ) external onlyOwner {
        require(
            _charity + _autoLiquidity + _marketing + _holdersRewards <= MAX_TAX,
            "Sell tax too high"
        );
        sellTax = TaxInfo(
            _charity,
            _autoLiquidity,
            _marketing,
            _holdersRewards
        );
    }

    function setExcludedFromFee(
        address account,
        bool excluded
    ) external onlyOwner {
        isExcludedFromFee[account] = excluded;
    }

    function setPair(address pair, bool value) external onlyOwner {
        require(pair != uniswapV2Pair, "Cannot change pair");
        isPair[pair] = value;
    }

    function setTaxActive(bool value) external onlyOwner {
        isTaxActive = value;
    }

    function setSwapAndLiquifyActive(
        bool _swapAndLiquifyActive
    ) external onlyOwner {
        swapAndLiquifyActive = _swapAndLiquifyActive;
    }

    function setMinTokensBeforeSwap(
        uint256 _minTokensBeforeSwap
    ) external onlyOwner {
        minTokensBeforeSwap = _minTokensBeforeSwap;
    }

    function processReserves() public {
        if (inSwap) return;
        inSwap = true;

        if (
            charityReserves > minTokensBeforeSwap &&
            charityAddress != address(0)
        ) {
            if (swapTaxes) {
                if (mainLPToken == wrappedNativeAddress) {
                    swapForETH(charityReserves, charityAddress);
                } else {
                    swapForERC20(charityReserves, charityAddress);
                }
            } else _transfer(address(this), charityAddress, charityReserves);
            delete charityReserves;
        }

        if (marketingReserves > minTokensBeforeSwap) {
            if (swapTaxes) {
                if (mainLPToken == wrappedNativeAddress) {
                    swapForETH(marketingReserves, marketingAddress);
                } else {
                    swapForERC20(marketingReserves, marketingAddress);
                }
            } else
                _transfer(address(this), marketingAddress, marketingReserves);
            delete marketingReserves;
        }

        if (reflectionReserves > minTokensBeforeSwap && !sameTokenForRewards) {
            if (mainLPToken == wrappedNativeAddress) {
                uint256 initialBalance = address(this).balance;

                swapForETH(reflectionReserves, address(this));

                uint256 balanceAfter = address(this).balance - initialBalance;

                _updateGlobalShares(balanceAfter);
            } else {
                swapForERC20(reflectionReserves, address(tempHolder));

                uint256 balanceAfter = IERC20(mainLPToken).balanceOf(
                    address(tempHolder)
                );

                tempHolder.transfer(mainLPToken, address(this), balanceAfter);

                _updateGlobalShares(balanceAfter);
            }

            delete reflectionReserves;
        } else if (sameTokenForRewards) {
            _updateGlobalShares(reflectionReserves);
            delete reflectionReserves;
        }

        if (
            autoLiquidityReserves / 2 > minTokensBeforeSwap &&
            autoLiquidityAddress != address(0)
        ) {
            autoLiquidityReserves = swapAndLiquify(autoLiquidityReserves);
        }

        inSwap = false;
    }

    function swapAndLiquify(uint256 _amount) internal returns (uint256) {
        uint256 half = _amount / 2;
        uint256 otherHalf = _amount - half;
        uint256 leftOver;
        if (mainLPToken == wrappedNativeAddress) {
            uint256 initialBalance = address(this).balance;

            swapForETH(half, address(this));

            uint256 newBalance = address(this).balance - initialBalance;

            (uint amountToken, , ) = addLiquidityETH(otherHalf, newBalance);

            leftOver = otherHalf - amountToken;
        } else {
            swapForERC20(half, address(tempHolder));

            uint256 newBalance = IERC20(mainLPToken).balanceOf(
                address(tempHolder)
            );

            tempHolder.transfer(mainLPToken, address(this), newBalance);

            (uint amountToken, , ) = addLiquidityERC20(otherHalf, newBalance);

            leftOver = otherHalf - amountToken;
        }

        return leftOver;
    }

    function addLiquidityETH(
        uint256 _tokenAmount,
        uint256 _NativeAmount
    ) private returns (uint, uint, uint) {
        return
            uniswapV2Router.addLiquidityETH{value: _NativeAmount}(
                address(this),
                _tokenAmount,
                0,
                0,
                autoLiquidityAddress,
                block.timestamp
            );
    }

    function addLiquidityERC20(
        uint256 _tokenAmount,
        uint256 _counterPartAmount
    ) private returns (uint, uint, uint) {
        return
            uniswapV2Router.addLiquidity(
                address(this),
                mainLPToken,
                _tokenAmount,
                _counterPartAmount,
                0,
                0,
                autoLiquidityAddress,
                block.timestamp
            );
    }

    function swapForETH(uint256 _amount, address _to) internal {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = wrappedNativeAddress;

        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            _amount,
            0,
            path,
            _to,
            block.timestamp
        );
    }

    function swapForERC20(uint256 _amount, address _to) internal {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = mainLPToken;

        uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
            _amount,
            0,
            path,
            _to,
            block.timestamp
        );
    }

    receive() external payable {
        // only receive from router
        require(msg.sender == address(uniswapV2Router), "Invalid sender");
    }

    function _afterTokenTransfer(
        address from_,
        address to_,
        uint256
    ) internal virtual override {
        _updateShare(from_);
        _updateShare(to_);
        if (!inSwap) _massProcess();
    }

    function _massProcess() internal {
        if (autoDistribute)
            batchProcessClaims(
                gasleft() > maxAutoProcessGas
                    ? maxAutoProcessGas
                    : (gasleft() * 80) / 100
            );
    }

    function _updateShare(address wallet) internal {
        if (!excludedFromRewards[wallet])
            _setShare(
                wallet,
                balanceOf(wallet) > minShareForRewards ? balanceOf(wallet) : 0
            );
    }

    function includeInRewards(
        address shareHolderToBeIncluded_
    ) external onlyOwner {
        require(
            excludedFromRewards[shareHolderToBeIncluded_],
            "HODLRewardsDistributor: not excluded"
        );

        _updateUserShares(
            shareHolderToBeIncluded_,
            balanceOf(shareHolderToBeIncluded_)
        );
        excludedFromRewards[shareHolderToBeIncluded_] = false;
        emit IncludedInRewards(shareHolderToBeIncluded_);
    }

    function setProcessingGasLimit(uint256 maxAmount_) external onlyOwner {
        maxAutoProcessGas = maxAmount_;
    }

    function setMinSharePerRewards(
        uint256 _minSharePerRewards
    ) external onlyOwner {
        minShareForRewards = _minSharePerRewards;
    }

    function setAutoDistribute(bool _autoDistribute) external onlyOwner {
        autoDistribute = _autoDistribute;
    }

    /**
        retruns the pending rewards amount
        */
    function pending(
        address sharholderAddress_
    ) public view returns (uint256 pendingAmount) {
        ShareHolder storage user = shareHolders[sharholderAddress_];
        pendingAmount = user.shares.mul(accPerShare).div(1e36).sub(
            user.rewardDebt
        );
    }

    function totalPending() public view returns (uint256) {
        return accPerShare.mul(totalShares).div(1e36).sub(totalRewardsDebt);
    }

    /**
        returns information about the share holder
        */
    function shareHolderInfo(
        address shareHoldr_
    ) external view returns (ShareHolder memory) {
        ShareHolder storage user = shareHolders[shareHoldr_];
        return
            ShareHolder(
                user.shares, // How many tokens the user is holding.
                user.rewardDebt, // see @masterChef contract for more details
                user.claimed,
                pending(shareHoldr_)
            );
    }

    function holders() external view returns (uint256) {
        return allShareHolders.length;
    }

    function _setShare(address sharholderAddress_, uint256 amount_) internal {
        ShareHolder storage user = shareHolders[sharholderAddress_];

        // pay any pending rewards
        if (user.shares > 0) claimPending(sharholderAddress_);
        // update total shares
        _updateUserShares(sharholderAddress_, amount_);
    }

    /*
        excludes shareHolderToBeExcluded_ from participating in rewards
        Will distribute what ever pending rewards he has to all other shareholders
        This is needed in case a contract that can't claim needs to be excluded
        If owner wants the excluded to receive their pending rewards he can call claimPending on their behalf before calling this function
    */
    function excludeFromRewards(
        address shareHolderToBeExcluded_
    ) external onlyOwner {
        _excludeFromRewards(shareHolderToBeExcluded_);
    }

    function _excludeFromRewards(address shareHolderToBeExcluded_) internal {
        if (excludedFromRewards[shareHolderToBeExcluded_]) return;

        uint256 amountPending = pending(shareHolderToBeExcluded_);
        // update this user's shares to 0
        _updateUserShares(shareHolderToBeExcluded_, 0);
        // distribute his pending share to all shareholders
        if (amountPending > 0) _updateGlobalShares(amountPending);
        excludedFromRewards[shareHolderToBeExcluded_] = true;
        emit ExcludedFromRewards(shareHolderToBeExcluded_);
    }

    /** 
        @dev
        claim pending rewards for sharholderAddress_
        can be called by anyone but only sharholderAddress_
        can receive the reward
    */
    function claimPending(address sharholderAddress_) public {
        ShareHolder storage user = shareHolders[sharholderAddress_];

        uint256 pendingAmount = user.shares.mul(accPerShare).div(1e36).sub(
            user.rewardDebt
        );

        if (pendingAmount <= 0) return;

        totalRewardsDebt = totalRewardsDebt.sub(user.rewardDebt);
        user.rewardDebt = user.shares.mul(accPerShare).div(1e36);
        totalRewardsDebt = totalRewardsDebt.add(user.rewardDebt);

        bool sent;

        if (isWethRewardToken) {
            (sent, ) = payable(sharholderAddress_).call{value: pendingAmount}(
                ""
            );
            //if !sent means probably the receiver is a non payable address
            if (!sent) {
                // add pending amount to global shares to prevent loss of ETH
                _updateGlobalShares(pendingAmount);
            }
        } else {
            IERC20(rewardToken).transfer(sharholderAddress_, pendingAmount);
            sent = true;
        }

        if (sent) {
            emit Claimed(sharholderAddress_, pendingAmount);
            user.claimed = user.claimed.add(pendingAmount);
            totalClaimed = totalClaimed.add(pendingAmount);
        }
    }

    bool private _inBatchProcess;

    function batchProcessClaims(uint256 gas) public {
        if (gasleft() < gas || _inBatchProcess) return;
        _inBatchProcess = true;
        uint256 gasUsed = 0;
        uint256 gasLeft = gasleft();
        uint256 iterations = 1; // index 0 is ocupied by address(0)
        uint256 index = _lastProccessedIndex;
        // we
        while (gasUsed < gas && iterations < allShareHolders.length) {
            claimPending(allShareHolders[index]);
            gasUsed = gasUsed.add(gasLeft.sub(gasleft()));
            gasLeft = gasleft();
            index = _incrementLastProccessed(index);
            iterations++;
        }

        _lastProccessedIndex = index;

        _inBatchProcess = false;
    }

    /**
        updates the accumulatedPerShare amount based on the new amount and total shares
        */
    uint256 reserved = 0;

    function _updateGlobalShares(uint256 amount_) internal {
        if (totalShares == 0) {
            reserved = reserved.add(amount_);
            return;
        }
        accPerShare = accPerShare.add(amount_.mul(1e36).div(totalShares)).add(
            reserved.mul(1e36).div(totalShares)
        );
        reserved = 0;
        emit RewardsAdded(amount_);
    }

    function updateGlobalShares(uint256 amount_) external onlyOwner {
        _updateGlobalShares(amount_);
    }

    /**
        updates a user share
    */
    function _updateUserShares(
        address sharholderAddress_,
        uint256 newAmount_
    ) internal {
        ShareHolder storage user = shareHolders[sharholderAddress_];
        totalShares = totalShares.sub(user.shares).add(newAmount_);
        totalRewardsDebt = totalRewardsDebt.sub(user.rewardDebt);
        user.shares = newAmount_;
        user.rewardDebt = user.shares.mul(accPerShare).div(1e36);
        totalRewardsDebt = totalRewardsDebt.add(user.rewardDebt);
        if (user.shares > 0 && indexOfShareHolders[sharholderAddress_] == 0) {
            // add this shareHolder to array
            allShareHolders.push(sharholderAddress_);

            indexOfShareHolders[sharholderAddress_] =
                allShareHolders.length -
                1;
        } else if (
            user.shares == 0 && indexOfShareHolders[sharholderAddress_] != 0
        ) {
            // remove this share holder from array
            uint256 index = indexOfShareHolders[sharholderAddress_];

            allShareHolders[index] = allShareHolders[
                allShareHolders.length - 1
            ];

            indexOfShareHolders[
                allShareHolders[allShareHolders.length - 1]
            ] = index;

            allShareHolders.pop();

            indexOfShareHolders[sharholderAddress_] = 0;
        }
        emit ShareUpdated(sharholderAddress_, newAmount_);
    }

    function _incrementLastProccessed(
        uint256 _index
    ) internal view returns (uint256) {
        _index++;
        if (_index >= allShareHolders.length) _index = 1;

        return _index;
    }
}

// 
abstract contract MaxWallet is ERC20Decimals, Ownable {
    uint256 _maxWallet;

    mapping(address => bool) private _isExcludedFromMaxWallet;

    constructor(uint256 _maxWalletAmount) {
        _maxWallet = _maxWalletAmount;
        _excludeFromMaxWallet(owner(), true);
        _excludeFromMaxWallet(address(this), true);
    }

    modifier ensureMaxBalance(address to) {
        require(
            _maxWallet == 0 ||
                to == address(0) ||
                isExcludedFromMaxWallet(to) ||
                balanceOf(to) <= _maxWallet,
            "MaxWallet: Wallet balance exceeds the maxWalletAmount"
        );
        _;
    }

    function maxWallet() public view returns (uint256) {
        return _maxWallet;
    }

    function setMaxWallet(uint256 _maxWalletAmount) public onlyOwner {
        _maxWallet = _maxWalletAmount;
    }

    function isExcludedFromMaxWallet(
        address account
    ) public view returns (bool) {
        return _isExcludedFromMaxWallet[account];
    }

    function excludeFromMaxWallet(
        address account,
        bool exclude
    ) public onlyOwner {
        _excludeFromMaxWallet(account, exclude);
    }

    function _excludeFromMaxWallet(address account, bool exclude) internal {
        _isExcludedFromMaxWallet[account] = exclude;
    }

    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override ensureMaxBalance(to) {}
}

abstract contract MaxWalletVotes is ERC20VotesDecimals, Ownable {
    uint256 _maxWallet;

    mapping(address => bool) private _isExcludedFromMaxWallet;

    constructor(uint256 _maxWalletAmount) {
        _maxWallet = _maxWalletAmount;
        _excludeFromMaxWallet(owner(), true);
        _excludeFromMaxWallet(address(this), true);
    }

    modifier ensureMaxBalance(address to) {
        require(
            _maxWallet == 0 ||
                to == address(0) ||
                isExcludedFromMaxWallet(to) ||
                balanceOf(to) <= _maxWallet,
            "MaxWallet: Wallet balance exceeds the maxWalletAmount"
        );
        _;
    }

    function maxWallet() public view returns (uint256) {
        return _maxWallet;
    }

    function setMaxWallet(uint256 _maxWalletAmount) public onlyOwner {
        _maxWallet = _maxWalletAmount;
    }

    function isExcludedFromMaxWallet(
        address account
    ) public view returns (bool) {
        return _isExcludedFromMaxWallet[account];
    }

    function excludeFromMaxWallet(
        address account,
        bool exclude
    ) public onlyOwner {
        _excludeFromMaxWallet(account, exclude);
    }

    function _excludeFromMaxWallet(address account, bool exclude) internal {
        _isExcludedFromMaxWallet[account] = exclude;
    }

    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override ensureMaxBalance(to) {}
}

// 
abstract contract MaxTransaction is ERC20Decimals, Ownable {
    uint256 private _period;
    uint256 _maxTransaction;

    // user => period => currentPeriod => amount
    mapping(address => mapping(uint256 => mapping(uint256 => uint256)))
        private _periodQuotas;

    mapping(address => bool) private _isExcludedFromMaxTransaction;

    constructor(uint256 _periodInSeconds, uint256 _maxTransactionAmount) {
        _period = _periodInSeconds;
        _maxTransaction = _maxTransactionAmount;
        _excludeFromMaxTransaction(owner(), true);
        _excludeFromMaxTransaction(address(this), true);
    }

    function maxTransaction() public view returns (uint256) {
        return _maxTransaction;
    }

    function setMaxTransaction(uint256 _maxTransactionAmount) public onlyOwner {
        _maxTransaction = _maxTransactionAmount;
    }

    function period() public view returns (uint256) {
        return _period;
    }

    function setPeriod(uint256 _periodInSeconds) public onlyOwner {
        _period = _periodInSeconds;
    }

    function _afterTokenTransfer(
        address from,
        address,
        uint256 amount
    ) internal virtual override {
        uint256 currentPeriod = _currentPeriod();

        if (
            _maxTransaction > 0 &&
            from != address(0) &&
            !isExcludedFromMaxTransaction(from)
        ) {
            _periodQuotas[from][_period][currentPeriod] += amount;
            require(
                _periodQuotas[from][_period][currentPeriod] <= _maxTransaction,
                "MaxTransaction: Transfer amount exceeds the maxTransactionAmount."
            );
        }
    }

    function isExcludedFromMaxTransaction(
        address account
    ) public view returns (bool) {
        return _isExcludedFromMaxTransaction[account];
    }

    function excludeFromMaxTransaction(
        address account,
        bool _exclude
    ) external onlyOwner {
        _excludeFromMaxTransaction(account, _exclude);
    }

    function _excludeFromMaxTransaction(
        address _account,
        bool _exclude
    ) internal {
        _isExcludedFromMaxTransaction[_account] = _exclude;
    }

    function clearPeriodQuota(address account) public onlyOwner {
        _periodQuotas[account][_period][_currentPeriod()] = 0;
    }

    function getCurrentQuota(address account) public view returns (uint256) {
        return _periodQuotas[account][_period][_currentPeriod()];
    }

    function _currentPeriod() internal view returns (uint256) {
        return block.timestamp / (_period > 0 ? _period : 1);
    }
}

abstract contract MaxTransactionVotes is ERC20VotesDecimals, Ownable {
    uint256 private _period;
    uint256 _maxTransaction;

    // user => period => currentPeriod => amount
    mapping(address => mapping(uint256 => mapping(uint256 => uint256)))
        private _periodQuotas;

    mapping(address => bool) private _isExcludedFromMaxTransaction;

    constructor(uint256 _periodInSeconds, uint256 _maxTransactionAmount) {
        _period = _periodInSeconds;
        _maxTransaction = _maxTransactionAmount;
        _excludeFromMaxTransaction(owner(), true);
        _excludeFromMaxTransaction(address(this), true);
    }

    function maxTransaction() public view returns (uint256) {
        return _maxTransaction;
    }

    function setMaxTransaction(uint256 _maxTransactionAmount) public onlyOwner {
        _maxTransaction = _maxTransactionAmount;
    }

    function period() public view returns (uint256) {
        return _period;
    }

    function setPeriod(uint256 _periodInSeconds) public onlyOwner {
        _period = _periodInSeconds;
    }

    function _afterTokenTransfer(
        address from,
        address,
        uint256 amount
    ) internal virtual override {
        uint256 currentPeriod = _currentPeriod();

        if (
            _maxTransaction > 0 &&
            from != address(0) &&
            !isExcludedFromMaxTransaction(from)
        ) {
            _periodQuotas[from][_period][currentPeriod] += amount;
            require(
                _periodQuotas[from][_period][currentPeriod] <= _maxTransaction,
                "MaxTransaction: Transfer amount exceeds the maxTransactionAmount."
            );
        }
    }

    function isExcludedFromMaxTransaction(
        address account
    ) public view returns (bool) {
        return _isExcludedFromMaxTransaction[account];
    }

    function excludeFromMaxTransaction(
        address account,
        bool _exclude
    ) external onlyOwner {
        _excludeFromMaxTransaction(account, _exclude);
    }

    function _excludeFromMaxTransaction(
        address _account,
        bool _exclude
    ) internal {
        _isExcludedFromMaxTransaction[_account] = _exclude;
    }

    function clearPeriodQuota(address account) public onlyOwner {
        _periodQuotas[account][_period][_currentPeriod()] = 0;
    }

    function getCurrentQuota(address account) public view returns (uint256) {
        return _periodQuotas[account][_period][_currentPeriod()];
    }

    function _currentPeriod() internal view returns (uint256) {
        return block.timestamp / (_period > 0 ? _period : 1);
    }
}

// 
abstract contract WhiteList is Ownable {
    mapping(address => bool) private _whiteList;

    event AddedToWhiteList(address indexed account);
    event RemovedFromWhiteList(address indexed account);

    modifier onlyWhiteListed() {
        require(
            _whiteList[_msgSender()],
            "WhiteList: account is not whitelisted"
        );
        _;
    }

    function _addToWhiteList(address account) internal {
        _whiteList[account] = true;
        emit AddedToWhiteList(account);
    }

    function _removeFromWhiteList(address account) internal {
        _whiteList[account] = false;
        emit RemovedFromWhiteList(account);
    }

    function addToWhiteList(address account) external onlyOwner {
        _addToWhiteList(account);
    }

    function removeFromWhiteList(address account) external onlyOwner {
        _removeFromWhiteList(account);
    }

    function isWhitelisted(address account) public view returns (bool) {
        return _whiteList[account];
    }
}

// 
// import "hardhat/console.sol";
abstract contract ERC20LaunchMode is ERC20Decimals, WhiteList {
    bool private _launchModeEnabled = true;

    modifier onlyAfterLaunch(address from, address to) {
        require(
            !_launchModeEnabled ||
                from == address(0) ||
                to == address(0) ||
                isWhitelisted(from) ||
                isWhitelisted(to) ||
                from == owner() ||
                to == owner(),
            "ERC20LaunchMode: Launch mode is enabled"
        );
        _;
    }

    function disableLaunchMode() external onlyOwner {
        _launchModeEnabled = false;
    }

    function isInLaunchMode() public view returns (bool) {
        return _launchModeEnabled;
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override onlyAfterLaunch(from, to) {}
}

abstract contract ERC20LaunchModeVotes is ERC20VotesDecimals, WhiteList {
    bool private _launchModeEnabled = true;

    modifier onlyAfterLaunch(address from, address to) {
        require(
            !_launchModeEnabled ||
                from == address(0) ||
                to == address(0) ||
                isWhitelisted(from) ||
                isWhitelisted(to) ||
                from == owner() ||
                to == owner(),
            "ERC20LaunchMode: Launch mode is enabled"
        );
        _;
    }

    function disableLaunchMode() external onlyOwner {
        _launchModeEnabled = false;
    }

    function isInLaunchMode() public view returns (bool) {
        return _launchModeEnabled;
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override onlyAfterLaunch(from, to) {}
}

// 
abstract contract BlockListVotes is ERC20VotesDecimals, Ownable {
    mapping(address => bool) private _blocklist;

    uint256 public blockListEnabled;

    modifier onlyNonBlocked(address from, address to) {
        require(
            blockListEnabled == 0 || (!_blocklist[from] && !_blocklist[to]),
            "BlockList: One of the accounts is blocked"
        );
        _;
    }

    function blockAddress(address account) public onlyOwner {
        _blocklist[account] = true;
    }

    function unblockAddress(address account) public onlyOwner {
        _blocklist[account] = false;
    }

    function enableBlockList() public onlyOwner {
        blockListEnabled = 1;
    }

    function disableBlockList() public onlyOwner {
        blockListEnabled = 0;
    }

    function isInBlockList(address account) public view returns (bool) {
        return _blocklist[account];
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override onlyNonBlocked(from, to) {}
}

abstract contract BlockList is ERC20Decimals, Ownable {
    mapping(address => bool) private _blocklist;

    uint256 public blockListEnabled;

    modifier onlyNonBlocked(address from, address to) {
        require(
            blockListEnabled == 0 || (!_blocklist[from] && !_blocklist[to]),
            "BlockList: One of the accounts is blocked"
        );
        _;
    }

    function blockAddress(address account) public onlyOwner {
        _blocklist[account] = true;
    }

    function unblockAddress(address account) public onlyOwner {
        _blocklist[account] = false;
    }

    function enableBlockList() public onlyOwner {
        blockListEnabled = 1;
    }

    function disableBlockList() public onlyOwner {
        blockListEnabled = 0;
    }

    function isInBlockList(address account) public view returns (bool) {
        return _blocklist[account];
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override onlyNonBlocked(from, to) {}
}

// 
abstract contract ERC20Burnable is ERC20Decimals {
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 allowance = allowance(account, _msgSender());

        require(allowance >= amount, "ERC20Burnable: Insufficient allowance");

        unchecked {
            _approve(account, _msgSender(), allowance - amount);
        }

        _burn(account, amount);
    }

    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }
}

abstract contract ERC20BurnableVotes is ERC20VotesDecimals {
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 allowance = allowance(account, _msgSender());

        require(allowance >= amount, "ERC20Burnable: Insufficient allowance");

        unchecked {
            _approve(account, _msgSender(), allowance - amount);
        }

        _burn(account, amount);
    }

    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }
}

// 
contract DividendsTokenCustomAntiBotLaunchBlockBurnVotes is
    ERC20VotesDecimals,
    MaxWalletVotes,
    MaxTransactionVotes,
    ERC20LaunchModeVotes,
    ERC20BurnableVotes,
    BlockListVotes
{
    /*  Universal distributor */
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    uint256 public minShareForRewards;

    uint256 public maxAutoProcessGas = 500000;

    bool public autoDistribute = true;

    uint256 public accPerShare; // Accumulated per share, times 1e36.
    uint256 public totalShares; // total number of shares
    uint256 public totalClaimed; // total amount claimed
    uint256 public totalRewardsDebt; // total amount claimed

    // use getShare-holderInfo function to get this data
    mapping(address => ShareHolder) shareHolders;
    address[] public allShareHolders;
    mapping(address => uint256) public indexOfShareHolders;

    uint256 private _lastProccessedIndex = 1;

    mapping(address => bool) public excludedFromRewards;

    // events
    event Claimed(address indexed claimer, uint256 indexed amount);
    event RewardsAdded(uint256 indexed amount);

    event ShareUpdated(
        address indexed shareHolder,
        uint256 indexed sharesAmount
    );
    event IncludedInRewards(address indexed shareHolder);
    event ExcludedFromRewards(address indexed shareHolder);

    address public immutable weth;
    address public immutable rewardToken;
    bool immutable isWethRewardToken;

    /** */

    uint256 public constant PERCENT_DENOMINATOR = 1000;
    uint256 public constant MAX_TAX = 200; // 20%

    IUniswapV2Router02 public immutable uniswapV2Router;
    address public immutable uniswapV2Pair;
    address public immutable wrappedNativeAddress;
    address public immutable mainLPToken;
    ERC20TempHolder public immutable tempHolder = new ERC20TempHolder();
    bool public immutable sameTokenForRewards;

    address public charityAddress;
    address public marketingAddress;
    address public autoLiquidityAddress;

    TaxInfo public transferTax;
    TaxInfo public buyTax;
    TaxInfo public sellTax;

    bool public isTaxActive;
    bool public swapAndLiquifyActive = true;

    uint256 public minTokensBeforeSwap; // 1 token

    mapping(address => bool) public isExcludedFromFee;

    mapping(address => bool) public isPair;

    uint256 public charityReserves;
    uint256 public marketingReserves;
    uint256 public autoLiquidityReserves;
    uint256 public reflectionReserves;

    bool public swapTaxes;

    function setSwapTaxes(bool _swapTaxes) external onlyOwner {
        swapTaxes = _swapTaxes;
    }

    constructor(
        uint256 _initialSupply,
        uint8 _decimals,
        string memory _name,
        string memory _symbol,
        address _owner,
        uint256 _maxWallet,
        uint256 _maxTx,
        uint256 _periodInSec,
        DividendConstructorArgs memory _args
    )
        ERC20VotesDecimals(_decimals)
        ERC20Permit(_name)
        ERC20(_name, _symbol)
        Ownable(_owner)
        MaxWalletVotes(_maxWallet)
        MaxTransactionVotes(_periodInSec, _maxTx)
    {
        minTokensBeforeSwap = (1 * 10) ** (decimals() - 1);

        uniswapV2Router = _args.uniswapV2Router;
        address __weth = _args.uniswapV2Router.WETH();
        wrappedNativeAddress = __weth;
        uniswapV2Pair = IUniswapV2Factory(_args.uniswapFactory).createPair(
            address(this),
            _args.mainLPToken
        );
        isPair[uniswapV2Pair] = true;

        mainLPToken = _args.mainLPToken;

        allShareHolders.push(address(0)); // use the index zero for address zero

        weth = __weth;
        rewardToken = _args.sameTokenForRewards
            ? address(this)
            : _args.mainLPToken;
        isWethRewardToken =
            !_args.sameTokenForRewards &&
            __weth == _args.mainLPToken;

        charityAddress = _args.charityAddress;
        marketingAddress = _args.marketingAddress;
        autoLiquidityAddress = _args.autoLiquidityAddress;

        isExcludedFromFee[owner()] = true;
        isExcludedFromFee[address(this)] = true;
        isExcludedFromFee[charityAddress] = true;
        isExcludedFromFee[marketingAddress] = true;
        isExcludedFromFee[address(tempHolder)] = true;

        transferTax = _args.transferTaxInfo;
        buyTax = _args.buyTaxInfo;
        sellTax = _args.sellTaxInfo;

        excludedFromRewards[uniswapV2Pair] = true;
        excludedFromRewards[address(this)] = true;
        excludedFromRewards[address(_args.uniswapV2Router)] = true;
        excludedFromRewards[address(tempHolder)] = true;
        excludedFromRewards[_owner] = true;

        // approve max uint for router
        _approve(address(this), address(uniswapV2Router), type(uint256).max);
        // approve max int mainLPToken for router
        IERC20(_args.mainLPToken).approve(
            address(uniswapV2Router),
            type(uint256).max
        );

        swapTaxes = _args.swapTaxes;

        minShareForRewards = _args.minShareForRewards;
        sameTokenForRewards = _args.sameTokenForRewards;

        _mint(_owner, _initialSupply);

        _excludeFromMaxTransaction(uniswapV2Pair, true);
        _excludeFromMaxWallet(uniswapV2Pair, true);

        _excludeFromMaxTransaction(address(_args.uniswapV2Router), true);
        _excludeFromMaxWallet(address(_args.uniswapV2Router), true);

        // exclude charity
        _excludeFromMaxTransaction(_args.charityAddress, true);
        _excludeFromMaxWallet(_args.charityAddress, true);

        // exclude marketing
        _excludeFromMaxTransaction(_args.marketingAddress, true);
        _excludeFromMaxWallet(_args.marketingAddress, true);

        // exclude autoLp
        _excludeFromMaxTransaction(_args.autoLiquidityAddress, true);
        _excludeFromMaxWallet(_args.autoLiquidityAddress, true);

        // exclude tempHolder
        _excludeFromMaxTransaction(address(tempHolder), true);
        _excludeFromMaxWallet(address(tempHolder), true);
    }

    function transfer(
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _customTransfer(_msgSender(), recipient, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        require(
            amount <= allowance(sender, _msgSender()),
            "Transfer amount exceeds allowance"
        );

        _customTransfer(sender, recipient, amount);

        unchecked {
            _approve(
                sender,
                _msgSender(),
                allowance(sender, _msgSender()) - amount
            );
        }
        return true;
    }

    bool inSwap = false;

    function _customTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        if (from == address(this) || to == address(this)) {
            _transfer(from, to, amount);
            return;
        }
        // TODO: implement taxes
        if (from != uniswapV2Pair && swapAndLiquifyActive) {
            processReserves();
        }

        // if excluded then do normal transfer
        if (
            !isTaxActive ||
            inSwap ||
            isExcludedFromFee[from] ||
            isExcludedFromFee[to] ||
            amount == 0
        ) {
            _transfer(from, to, amount);
            return;
        }
        // if not excluded then apply tax
        TaxInfo memory taxInfo;
        uint64 totalTax;
        uint256 taxAmount;
        if (!isPair[from] && !isPair[to]) {
            taxInfo = transferTax;
        } else if (isPair[from] && !isPair[to]) {
            taxInfo = buyTax;
        } else {
            taxInfo = sellTax;
        }

        unchecked {
            totalTax =
                taxInfo.charity +
                taxInfo.autoLiquidity +
                taxInfo.marketing +
                taxInfo.reflection;
            taxAmount = (amount * totalTax) / PERCENT_DENOMINATOR;
        }

        _transfer(from, address(this), taxAmount);
        _transfer(from, to, amount - taxAmount);

        unchecked {
            // charity
            charityReserves += (taxAmount * taxInfo.charity) / totalTax;
            // auto liquidity
            autoLiquidityReserves +=
                (taxAmount * taxInfo.autoLiquidity) /
                totalTax;
            // marketing
            marketingReserves += (taxAmount * taxInfo.marketing) / totalTax;
            // reflection
            reflectionReserves += (taxAmount * taxInfo.reflection) / totalTax;
        }
    }

    // setters
    function setCharityAddress(address _charityAddress) external onlyOwner {
        charityAddress = _charityAddress;
    }

    function setMarketingAddress(address _marketingAddress) external onlyOwner {
        marketingAddress = _marketingAddress;
    }

    function setAutoLiquidityAddress(
        address _autoLiquidityAddress
    ) external onlyOwner {
        autoLiquidityAddress = _autoLiquidityAddress;
    }

    function setTransferTax(
        uint64 _charity,
        uint64 _autoLiquidity,
        uint64 _marketing,
        uint64 _holdersRewards
    ) external onlyOwner {
        require(
            _charity + _autoLiquidity + _marketing + _holdersRewards <= MAX_TAX,
            "Transfer tax too high"
        );
        transferTax = TaxInfo(
            _charity,
            _autoLiquidity,
            _marketing,
            _holdersRewards
        );
    }

    function setBuyTax(
        uint64 _charity,
        uint64 _autoLiquidity,
        uint64 _marketing,
        uint64 _holdersRewards
    ) external onlyOwner {
        require(
            _charity + _autoLiquidity + _marketing + _holdersRewards <= MAX_TAX,
            "Buy tax too high"
        );
        buyTax = TaxInfo(_charity, _autoLiquidity, _marketing, _holdersRewards);
    }

    function setSellTax(
        uint64 _charity,
        uint64 _autoLiquidity,
        uint64 _marketing,
        uint64 _holdersRewards
    ) external onlyOwner {
        require(
            _charity + _autoLiquidity + _marketing + _holdersRewards <= MAX_TAX,
            "Sell tax too high"
        );
        sellTax = TaxInfo(
            _charity,
            _autoLiquidity,
            _marketing,
            _holdersRewards
        );
    }

    function setExcludedFromFee(
        address account,
        bool excluded
    ) external onlyOwner {
        isExcludedFromFee[account] = excluded;
    }

    function setPair(address pair, bool value) external onlyOwner {
        require(pair != uniswapV2Pair, "Cannot change pair");
        isPair[pair] = value;
    }

    function setTaxActive(bool value) external onlyOwner {
        isTaxActive = value;
    }

    function setSwapAndLiquifyActive(
        bool _swapAndLiquifyActive
    ) external onlyOwner {
        swapAndLiquifyActive = _swapAndLiquifyActive;
    }

    function setMinTokensBeforeSwap(
        uint256 _minTokensBeforeSwap
    ) external onlyOwner {
        minTokensBeforeSwap = _minTokensBeforeSwap;
    }

    function processReserves() public {
        if (inSwap) return;
        inSwap = true;

        if (
            charityReserves > minTokensBeforeSwap &&
            charityAddress != address(0)
        ) {
            if (swapTaxes) {
                if (mainLPToken == wrappedNativeAddress) {
                    swapForETH(charityReserves, charityAddress);
                } else {
                    swapForERC20(charityReserves, charityAddress);
                }
            } else _transfer(address(this), charityAddress, charityReserves);
            delete charityReserves;
        }

        if (marketingReserves > minTokensBeforeSwap) {
            if (swapTaxes) {
                if (mainLPToken == wrappedNativeAddress) {
                    swapForETH(marketingReserves, marketingAddress);
                } else {
                    swapForERC20(marketingReserves, marketingAddress);
                }
            } else
                _transfer(address(this), marketingAddress, marketingReserves);
            delete marketingReserves;
        }

        if (reflectionReserves > minTokensBeforeSwap && !sameTokenForRewards) {
            if (mainLPToken == wrappedNativeAddress) {
                uint256 initialBalance = address(this).balance;

                swapForETH(reflectionReserves, address(this));

                uint256 balanceAfter = address(this).balance - initialBalance;

                _updateGlobalShares(balanceAfter);
            } else {
                swapForERC20(reflectionReserves, address(tempHolder));

                uint256 balanceAfter = IERC20(mainLPToken).balanceOf(
                    address(tempHolder)
                );

                tempHolder.transfer(mainLPToken, address(this), balanceAfter);

                _updateGlobalShares(balanceAfter);
            }

            delete reflectionReserves;
        } else if (sameTokenForRewards) {
            _updateGlobalShares(reflectionReserves);
            delete reflectionReserves;
        }

        if (
            autoLiquidityReserves > minTokensBeforeSwap &&
            autoLiquidityAddress != address(0)
        ) {
            autoLiquidityReserves = swapAndLiquify(autoLiquidityReserves);
        }

        inSwap = false;
    }

    function swapAndLiquify(uint256 _amount) internal returns (uint256) {
        uint256 half = _amount / 2;
        uint256 otherHalf = _amount - half;
        uint256 leftOver;
        if (mainLPToken == wrappedNativeAddress) {
            uint256 initialBalance = address(this).balance;

            swapForETH(half, address(this));

            uint256 newBalance = address(this).balance - initialBalance;

            (uint amountToken, , ) = addLiquidityETH(otherHalf, newBalance);

            leftOver = otherHalf - amountToken;
        } else {
            swapForERC20(half, address(tempHolder));

            uint256 newBalance = IERC20(mainLPToken).balanceOf(
                address(tempHolder)
            );

            tempHolder.transfer(mainLPToken, address(this), newBalance);

            (uint amountToken, , ) = addLiquidityERC20(otherHalf, newBalance);

            leftOver = otherHalf - amountToken;
        }

        return leftOver;
    }

    function addLiquidityETH(
        uint256 _tokenAmount,
        uint256 _NativeAmount
    ) private returns (uint, uint, uint) {
        return
            uniswapV2Router.addLiquidityETH{value: _NativeAmount}(
                address(this),
                _tokenAmount,
                0,
                0,
                autoLiquidityAddress,
                block.timestamp
            );
    }

    function addLiquidityERC20(
        uint256 _tokenAmount,
        uint256 _counterPartAmount
    ) private returns (uint, uint, uint) {
        return
            uniswapV2Router.addLiquidity(
                address(this),
                mainLPToken,
                _tokenAmount,
                _counterPartAmount,
                0,
                0,
                autoLiquidityAddress,
                block.timestamp
            );
    }

    function swapForETH(uint256 _amount, address _to) internal {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = wrappedNativeAddress;

        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            _amount,
            0,
            path,
            _to,
            block.timestamp
        );
    }

    function swapForERC20(uint256 _amount, address _to) internal {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = mainLPToken;

        uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
            _amount,
            0,
            path,
            _to,
            block.timestamp
        );
    }

    receive() external payable {
        // only receive from router
        require(msg.sender == address(uniswapV2Router), "Invalid sender");
    }

    function _afterTokenTransfer(
        address from_,
        address to_,
        uint256 _amount
    )
        internal
        virtual
        override(MaxWalletVotes, MaxTransactionVotes, ERC20VotesDecimals)
    {
        MaxWalletVotes._afterTokenTransfer(from_, to_, _amount);
        MaxTransactionVotes._afterTokenTransfer(from_, to_, _amount);
        ERC20VotesDecimals._afterTokenTransfer(from_, to_, _amount);
        _updateShare(from_);
        _updateShare(to_);
        if (!inSwap) _massProcess();
    }

    function _massProcess() internal {
        if (autoDistribute)
            batchProcessClaims(
                gasleft() > maxAutoProcessGas
                    ? maxAutoProcessGas
                    : (gasleft() * 80) / 100
            );
    }

    function _updateShare(address wallet) internal {
        if (!excludedFromRewards[wallet])
            _setShare(
                wallet,
                balanceOf(wallet) > minShareForRewards ? balanceOf(wallet) : 0
            );
    }

    function includeInRewards(
        address shareHolderToBeIncluded_
    ) external onlyOwner {
        require(
            excludedFromRewards[shareHolderToBeIncluded_],
            "HODLRewardsDistributor: not excluded"
        );

        _updateUserShares(
            shareHolderToBeIncluded_,
            balanceOf(shareHolderToBeIncluded_)
        );
        excludedFromRewards[shareHolderToBeIncluded_] = false;
        emit IncludedInRewards(shareHolderToBeIncluded_);
    }

    function setProcessingGasLimit(uint256 maxAmount_) external onlyOwner {
        maxAutoProcessGas = maxAmount_;
    }

    function setMinSharePerRewards(
        uint256 _minSharePerRewards
    ) external onlyOwner {
        minShareForRewards = _minSharePerRewards;
    }

    function setAutoDistribute(bool _autoDistribute) external onlyOwner {
        autoDistribute = _autoDistribute;
    }

    /**
        retruns the pending rewards amount
        */
    function pending(
        address sharholderAddress_
    ) public view returns (uint256 pendingAmount) {
        ShareHolder storage user = shareHolders[sharholderAddress_];
        pendingAmount = user.shares.mul(accPerShare).div(1e36).sub(
            user.rewardDebt
        );
    }

    function totalPending() public view returns (uint256) {
        return accPerShare.mul(totalShares).div(1e36).sub(totalRewardsDebt);
    }

    /**
        returns information about the share holder
        */
    function shareHolderInfo(
        address shareHoldr_
    ) external view returns (ShareHolder memory) {
        ShareHolder storage user = shareHolders[shareHoldr_];
        return
            ShareHolder(
                user.shares, // How many tokens the user is holding.
                user.rewardDebt, // see @masterChef contract for more details
                user.claimed,
                pending(shareHoldr_)
            );
    }

    function holders() external view returns (uint256) {
        return allShareHolders.length;
    }

    function _setShare(address sharholderAddress_, uint256 amount_) internal {
        ShareHolder storage user = shareHolders[sharholderAddress_];

        // pay any pending rewards
        if (user.shares > 0) claimPending(sharholderAddress_);
        // update total shares
        _updateUserShares(sharholderAddress_, amount_);
    }

    /*
        excludes shareHolderToBeExcluded_ from participating in rewards
        Will distribute what ever pending rewards he has to all other shareholders
        This is needed in case a contract that can't claim needs to be excluded
        If owner wants the excluded to receive their pending rewards he can call claimPending on their behalf before calling this function
    */
    function excludeFromRewards(
        address shareHolderToBeExcluded_
    ) external onlyOwner {
        _excludeFromRewards(shareHolderToBeExcluded_);
    }

    function _excludeFromRewards(address shareHolderToBeExcluded_) internal {
        if (excludedFromRewards[shareHolderToBeExcluded_]) return;

        uint256 amountPending = pending(shareHolderToBeExcluded_);
        // update this user's shares to 0
        _updateUserShares(shareHolderToBeExcluded_, 0);
        // distribute his pending share to all shareholders
        if (amountPending > 0) _updateGlobalShares(amountPending);
        excludedFromRewards[shareHolderToBeExcluded_] = true;
        emit ExcludedFromRewards(shareHolderToBeExcluded_);
    }

    /** 
        @dev
        claim pending rewards for sharholderAddress_
        can be called by anyone but only sharholderAddress_
        can receive the reward
    */
    function claimPending(address sharholderAddress_) public {
        ShareHolder storage user = shareHolders[sharholderAddress_];

        uint256 pendingAmount = user.shares.mul(accPerShare).div(1e36).sub(
            user.rewardDebt
        );

        if (pendingAmount <= 0) return;

        totalRewardsDebt = totalRewardsDebt.sub(user.rewardDebt);
        user.rewardDebt = user.shares.mul(accPerShare).div(1e36);
        totalRewardsDebt = totalRewardsDebt.add(user.rewardDebt);

        bool sent;

        if (isWethRewardToken) {
            (sent, ) = payable(sharholderAddress_).call{value: pendingAmount}(
                ""
            );
            //if !sent means probably the receiver is a non payable address
            if (!sent) {
                // add pending amount to global shares to prevent loss of ETH
                _updateGlobalShares(pendingAmount);
            }
        } else {
            IERC20(rewardToken).transfer(sharholderAddress_, pendingAmount);
            sent = true;
        }

        if (sent) {
            emit Claimed(sharholderAddress_, pendingAmount);
            user.claimed = user.claimed.add(pendingAmount);
            totalClaimed = totalClaimed.add(pendingAmount);
        }
    }

    bool private _inBatchProcess;

    function batchProcessClaims(uint256 gas) public {
        if (gasleft() < gas || _inBatchProcess) return;
        _inBatchProcess = true;
        uint256 gasUsed = 0;
        uint256 gasLeft = gasleft();
        uint256 iterations = 1; // index 0 is ocupied by address(0)
        uint256 index = _lastProccessedIndex;
        // we
        while (gasUsed < gas && iterations < allShareHolders.length) {
            claimPending(allShareHolders[index]);
            gasUsed = gasUsed.add(gasLeft.sub(gasleft()));
            gasLeft = gasleft();
            index = _incrementLastProccessed(index);
            iterations++;
        }

        _lastProccessedIndex = index;

        _inBatchProcess = false;
    }

    /**
        updates the accumulatedPerShare amount based on the new amount and total shares
        */
    uint256 reserved = 0;

    function _updateGlobalShares(uint256 amount_) internal {
        if (totalShares == 0) {
            reserved = reserved.add(amount_);
            return;
        }
        accPerShare = accPerShare.add(amount_.mul(1e36).div(totalShares)).add(
            reserved.mul(1e36).div(totalShares)
        );
        reserved = 0;
        emit RewardsAdded(amount_);
    }

    function updateGlobalShares(uint256 amount_) external onlyOwner {
        _updateGlobalShares(amount_);
    }

    /**
        updates a user share
    */
    function _updateUserShares(
        address sharholderAddress_,
        uint256 newAmount_
    ) internal {
        ShareHolder storage user = shareHolders[sharholderAddress_];
        totalShares = totalShares.sub(user.shares).add(newAmount_);
        totalRewardsDebt = totalRewardsDebt.sub(user.rewardDebt);
        user.shares = newAmount_;
        user.rewardDebt = user.shares.mul(accPerShare).div(1e36);
        totalRewardsDebt = totalRewardsDebt.add(user.rewardDebt);
        if (user.shares > 0 && indexOfShareHolders[sharholderAddress_] == 0) {
            // add this shareHolder to array
            allShareHolders.push(sharholderAddress_);

            indexOfShareHolders[sharholderAddress_] =
                allShareHolders.length -
                1;
        } else if (
            user.shares == 0 && indexOfShareHolders[sharholderAddress_] != 0
        ) {
            // remove this share holder from array
            uint256 index = indexOfShareHolders[sharholderAddress_];

            allShareHolders[index] = allShareHolders[
                allShareHolders.length - 1
            ];

            indexOfShareHolders[
                allShareHolders[allShareHolders.length - 1]
            ] = index;

            allShareHolders.pop();

            indexOfShareHolders[sharholderAddress_] = 0;
        }
        emit ShareUpdated(sharholderAddress_, newAmount_);
    }

    function _incrementLastProccessed(
        uint256 _index
    ) internal view returns (uint256) {
        _index++;
        if (_index >= allShareHolders.length) _index = 1;

        return _index;
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override(ERC20, ERC20LaunchModeVotes, BlockListVotes) {
        ERC20._beforeTokenTransfer(from, to, amount);
        ERC20LaunchModeVotes._beforeTokenTransfer(from, to, amount);
        BlockListVotes._beforeTokenTransfer(from, to, amount);
    }
}