// SPDX-License-Identifier: MIT


pragma solidity 0.8.19;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

/**
 * @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);
}

/*
 * @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;
    }
}

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, 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:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - 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) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][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) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * 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:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `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;
        _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;
        }
        _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 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 {}
}

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) internal {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}



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;
}

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;
}

// 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;
        }
    }
}

interface IDividendDistributor {
    function setShare(address shareholder, uint256 amount) external;
    function deposit() external payable;
   
}

contract DividendDistributor is IDividendDistributor {
    using SafeMath for uint256;

    address _token;

    struct Share {
        uint256 amount;
        uint256 totalExcluded;
        uint256 totalRealised;
    }

    IERC20 RWRD = IERC20(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2); //replace with reward token address here
    
    IUniswapV2Router02 router;
    bool ETH;

    address[] shareholders;
    mapping (address => uint256) shareholderIndexes;
    mapping (address => uint256) shareholderClaims;

    mapping (address => Share) public shares;

    uint256 public totalShares;
    uint256 public totalDividends;
    uint256 public totalDistributed;
    uint256 public dividendsPerShare;
    uint256 public dividendsPerShareAccuracyFactor = 10 ** 36;

    bool initialized;
    modifier initialization() {
        require(!initialized);
        _;
        initialized = true;
    }

    modifier onlyToken() {
        require(msg.sender == _token); _;
    }

    constructor (address _router) {
        router = _router != address(0)
            ? IUniswapV2Router02(_router)
            : IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _token = msg.sender;
    }

   

    function setShare(address shareholder, uint256 amount) external override onlyToken {
        

        if(amount > 0 && shares[shareholder].amount == 0){
            addShareholder(shareholder);
        }else if(amount == 0 && shares[shareholder].amount > 0){
            removeShareholder(shareholder);
        }

        totalShares = totalShares.sub(shares[shareholder].amount).add(amount);
        shares[shareholder].amount = amount;
        shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount);
    }

    function updateRewardToken (address _newToken, bool isETH) external onlyToken{
        require (_newToken != address(RWRD)&& _newToken != address(0),"already have same reward token & address should not be zero address");
        if(!isETH && _newToken != address(router.WETH())){
        if(ETH){
            ETH = false;
        }    
        RWRD = IERC20(_newToken);
        }
        if(isETH || _newToken == address(router.WETH())){
            ETH = true;
        }
    }

    function deposit() public payable override onlyToken {
       
        uint256 amount = msg.value;

        totalDividends = totalDividends.add(amount);
        dividendsPerShare = dividendsPerShare.add(dividendsPerShareAccuracyFactor.mul(amount).div(totalShares));
    }


    function distributeDividend(address shareholder) internal {
        if(shares[shareholder].amount == 0){ return; }

        uint256 amount = getUnpaidEarnings(shareholder);
            totalDistributed = totalDistributed.add(amount);
            if(!ETH){
            address[] memory path = new address[](2);
            path[0] = router.WETH();
            path[1] = address(RWRD);

           router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(
            0,
            path,
            shareholder,
            block.timestamp
            );
            }
        if(ETH){
            (bool os,) = shareholder.call{value: amount}("");
            require (os,"eth transfer failed");
        }
            shareholderClaims[shareholder] = block.timestamp;
            shares[shareholder].totalRealised = shares[shareholder].totalRealised.add(amount);
            shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount);
    }
    
    
    function claimDividend() external {
        distributeDividend(msg.sender);
    }

    function getUnpaidEarnings(address shareholder) public view returns (uint256) {
        if(shares[shareholder].amount == 0){ return 0; }

        uint256 shareholderTotalDividends = getCumulativeDividends(shares[shareholder].amount);
        uint256 shareholderTotalExcluded = shares[shareholder].totalExcluded;

        if(shareholderTotalDividends <= shareholderTotalExcluded){ return 0; }

        return shareholderTotalDividends.sub(shareholderTotalExcluded);
    }

    function getCumulativeDividends(uint256 share) internal view returns (uint256) {
        return share.mul(dividendsPerShare).div(dividendsPerShareAccuracyFactor);
    }

    function addShareholder(address shareholder) internal {
        shareholderIndexes[shareholder] = shareholders.length;
        shareholders.push(shareholder);
    }

    function removeShareholder(address shareholder) internal {
        shareholders[shareholderIndexes[shareholder]] = shareholders[shareholders.length-1];
        shareholderIndexes[shareholders[shareholders.length-1]] = shareholderIndexes[shareholder];
        shareholders.pop();
    }
   
   
}

contract REFLECT is ERC20, Ownable {
    using SafeMath for uint256;

    // CONFIG START
    
    uint256 private initialSupply;
   
    uint256 private denominator = 100;

    uint256 private swapThreshold = 0.0000005 ether; // The contract will only swap to ETH, once the fee tokens reach the specified threshold
    
    uint256 private reflectionTaxBuy;
    uint256 private marketingTaxBuy;
    
    uint256 private reflectionTaxSell;
    uint256 private marketingTaxSell;
   
    
    address private reflectionTaxWallet;
    address private marketingTaxWallet;

    uint256 public maxTxAmount;
    uint256 public maxWalletAmount;
   
    
    // CONFIG END
    
    mapping (address => bool) private blacklist;
    mapping (address => bool) private whitelisted;
    mapping (address => bool) public isDividendExempt;
    mapping (address => bool) public maxTxLimitExcluded;
    mapping (address => bool) public maxWalletLimitExcluded;

    
    mapping (string => uint256) private buyTaxes;
    mapping (string => uint256) private sellTaxes;
    mapping (string => address) private taxWallets;
    
    bool public taxStatus = true;
    
    IUniswapV2Router02 private uniswapV2Router02;
    IUniswapV2Factory private uniswapV2Factory;
    IUniswapV2Pair private uniswapV2Pair;
    DividendDistributor public distributor;

    constructor() ERC20("REFLECTARIUM", "REFRIUM") payable
    {
        initialSupply = 1000000000 * (10**18);
        _setOwner(msg.sender);
        maxTxAmount = initialSupply / 100;
        maxWalletAmount = maxTxAmount * 2;
        uniswapV2Router02 = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Factory = IUniswapV2Factory(uniswapV2Router02.factory());
        uniswapV2Pair = IUniswapV2Pair(uniswapV2Factory.createPair(address(this), uniswapV2Router02.WETH()));
        setMarketingWallet(address(0xedDE8f4A918e3e29fbafe8cad5f49d90d9f4A327));
        setBuyTax(2,4);
        setSellTax(3,6);
         distributor = new DividendDistributor(address(uniswapV2Router02));
        isDividendExempt[address(uniswapV2Pair)] = true;
        isDividendExempt[address(this)] = true;
        isDividendExempt[msg.sender] = false;
        isDividendExempt[address(0xdead)] = true;
       
        whitelist(msg.sender);
        whitelist(address(this));
     
        _mint(msg.sender, initialSupply);
    }
    
    uint256 private marketingTokens;
    uint256 private reflectionTokens;
   
    
    /**
     * @dev Calculates the tax, transfer it to the contract. If the user is selling, and the swap threshold is met, it executes the tax.
     */
    function handleTax(address from, address to, uint256 amount) private returns (uint256) {
        address[] memory sellPath = new address[](2);
        sellPath[0] = address(this);
        sellPath[1] = uniswapV2Router02.WETH();
        
        if(!iswhitelistd(from) && !iswhitelistd(to)) {
            uint256 tax;
            uint256 baseUnit = amount / denominator;
            if (!maxTxLimitExcluded[from] || !maxTxLimitExcluded[to]){
                require (amount <= maxTxAmount, "Max Tx Limit reached");
            }
            if(from == address(uniswapV2Pair) ) { 
                tax += baseUnit * buyTaxes["marketing"];
                tax += baseUnit * buyTaxes["reflection"];

                
                
                if (amount >= maxTxAmount){
                    tax = tax * 8/10; // 20% tax off for buying equals to maxTx
                }
                
                if(tax > 0) {
                    _transfer(from, address(this), tax);   
                }
                
                marketingTokens += baseUnit * buyTaxes["marketing"];
                reflectionTokens += baseUnit * buyTaxes["reflection"];

                if (amount >= maxTxAmount){
                    marketingTokens = marketingTokens * 8 / 10;
                    reflectionTokens = reflectionTokens * 8 /10;
                }

               
            } else if(to == address(uniswapV2Pair)) {
                tax += baseUnit * sellTaxes["marketing"];
                tax += baseUnit * sellTaxes["reflection"];
               
                if(amount >= maxTxAmount / 10){
                    tax = tax * 15 / 10; // 1.5x tax for bigger sells
                }
                
                if(tax > 0 ) {
                    _transfer(from, address(this), tax);   
                }
                
                marketingTokens += baseUnit * sellTaxes["marketing"];
                reflectionTokens += baseUnit * sellTaxes["reflection"];

                if(amount >= maxTxAmount/10){
                    marketingTokens = marketingTokens * 15 / 10;
                    reflectionTokens = reflectionTokens * 15 /10;
                }
               
                
                uint256 taxSum = marketingTokens + reflectionTokens;
                
                if(taxSum == 0) return amount;
                
                uint256 ethValue = uniswapV2Router02.getAmountsOut(marketingTokens + reflectionTokens, sellPath)[1];
                
                if(ethValue >= swapThreshold) {
                    uint256 startBalance = address(this).balance;

                    uint256 toSell = marketingTokens + reflectionTokens;
                    
                    _approve(address(this), address(uniswapV2Router02), toSell);
            
                    uniswapV2Router02.swapExactTokensForETH(
                        toSell,
                        0,
                        sellPath,
                        address(this),
                        block.timestamp
                    );
                    
                    uint256 ethGained = address(this).balance - startBalance;
                    
                    
                    uint256 marketingETH = (ethGained * ((marketingTokens * 10**18) / taxSum)) / 10**18;
                    uint256 reflectionETH = (ethGained * ((reflectionTokens * 10**18) / taxSum)) / 10**18;
                    
                  (bool sent,) =  taxWallets["marketing"].call{value: marketingETH}("");
                  require (sent, "eth to marketing failed");
                    distributor.deposit{value :reflectionETH}();
                    
                    marketingTokens = 0;
                    reflectionTokens = 0;
                   
                }
                
            }
            
            amount -= tax;
            if(to != address(uniswapV2Pair) && !maxWalletLimitExcluded[to]){
                require(balanceOf(to) + amount <= maxWalletAmount,"Amount exceeds maxWallet Limit");
            }
        }
        
        return amount;
    }
    
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal override virtual {
        require(!isBlacklisted(msg.sender), "Token: sender blacklisted");
        require(!isBlacklisted(recipient), "Token: recipient blacklisted");
        require(!isBlacklisted(tx.origin), "Token: sender blacklisted");
        
        if(taxStatus) {
            amount = handleTax(sender, recipient, amount);   
        }
        
        super._transfer(sender, recipient, amount);

         if(!isDividendExempt[sender]) {
            try distributor.setShare(sender, balanceOf(sender)) {} catch {}
        }

        if(!isDividendExempt[recipient]) {
            try distributor.setShare(recipient, balanceOf(recipient)) {} catch {} 
        }
    }
    
     /**
     * @dev claim rewards
     */
    function claimDividend() external {
        distributor.claimDividend();
    }

     /**
     * @dev set reward token. set bool to true to give eth as reward
     */

     function setRewardToken (address _token, bool ETH) external onlyOwner {
        distributor.updateRewardToken(_token, ETH);
     }
    /**
     * @dev add or remove user address in maxTx limit.
     */
    function manageMaxTx (address user, bool value) external onlyOwner {
        maxTxLimitExcluded[user] = value;
    }

    /**
     * @dev add or remove user address in maxWallet limit.
     */
    function manageMaxWallet (address user, bool value) external onlyOwner {
        maxWalletLimitExcluded[user] = value;
    }

   
    /**
     * @dev Burns tokens from caller address.
     */
    function burn(uint256 amount) public onlyOwner {
        _burn(msg.sender, amount);
    }
    
    /**
     * @dev Blacklists the specified account (Disables transfers to and from the account).
     */
    function addToBlacklist(address account) public onlyOwner {
        require(!blacklist[account], "Token: Account is already blacklisted");
        blacklist[account] = true;
    }
    
    /**
     * @dev Remove the specified account from the blacklist.
     */
    function removeFromBlacklist(address account) public onlyOwner {
        require(blacklist[account], "Token: Account is not blacklisted");
        blacklist[account] = false;
    }

    
    
    /**
     * @dev whitelists the specified account from tax.
     */
    function whitelist(address account) public onlyOwner {
        require(!iswhitelistd(account), "Token: Account is already whitelistd");
        whitelisted[account] = true;
    }
    
    /**
     * @dev Re-enables tax on the specified account.
     */
    function removewhitelist(address account) public onlyOwner {
        require(iswhitelistd(account), "Token: Account is not whitelistd");
        whitelisted[account] = false;
    }
    
    /**
     * @dev Sets tax for buys.
     */
    function setBuyTax(uint256 dev, uint256 marketing) public onlyOwner {
        buyTaxes["reflection"] = dev;
        buyTaxes["marketing"] = marketing;
       
    }
    
    /**
     * @dev Sets tax for sells.
     */
    function setSellTax(uint256 dev, uint256 marketing) public onlyOwner {

        sellTaxes["reflection"] = dev;
        sellTaxes["marketing"] = marketing;
       
    }
     
     /**
     * @dev claim stucked bnb from contract.
     */
    function clearStuckBalance() external onlyOwner{
        uint256 amountBNB = address(this).balance;
        (bool os,) = owner().call{value: amountBNB}("");
       require (os, "eth transfer failed");
    }

    /**
     * @dev claim stucked tokens from contract.
     */

    function clearStuckedTokens(address token) external onlyOwner {
        require (token != address(this), "can't claim native token");
        uint256 amount = IERC20(token).balanceOf(address(this));
        IERC20(token).transfer(owner(), amount);
    } 
    
    /**
     * @dev Set marketing wallet for taxes.
     */
    function setMarketingWallet( address marketing) public onlyOwner { 
        require (marketing != address(0), "zero address not allowed");
        taxWallets["marketing"] = marketing;
       
    }
    
    /**
     * @dev Enables tax globally.
     */
    function enableTax() public onlyOwner {
        require(!taxStatus, "Token: Tax is already enabled");
        taxStatus = true;
    }
    
    /**
     * @dev Disables tax globally.
     */
    function disableTax() public onlyOwner {
        require(taxStatus, "Token: Tax is already disabled");
        taxStatus = false;
    }
    
    /**
     * @dev Returns true if the account is blacklisted, and false otherwise.
     */
    function isBlacklisted(address account) public view returns (bool) {
        return blacklist[account];
    }

    

    /**
     * @dev add or remove someone from dividends.
     */
    function setIsDividendExempt(address holder, bool exempt) external onlyOwner {
        require(holder != address(this) && holder != address(uniswapV2Pair));
        isDividendExempt[holder] = exempt;
        if(exempt){
            distributor.setShare(holder, 0);
        }else{
            distributor.setShare(holder, balanceOf(holder));
        }
    }

    /**
     * @dev manage airdrop with different amounts.
     */

    function multiTransfer(address from, address[] calldata addresses, uint256[] calldata tokens) external onlyOwner {

       require(addresses.length < 501,"GAS Error: max airdrop limit is 500 addresses");
       require(addresses.length == tokens.length,"Mismatch between Address and token count");

       uint256 enoughTokens = 0;

       for(uint i=0; i < addresses.length; i++){
        enoughTokens = enoughTokens + tokens[i];
    }

       require(balanceOf(from) >= enoughTokens, "Not enough tokens in wallet");

       for(uint i=0; i < addresses.length; i++){
        _transfer(from,addresses[i],tokens[i]);
        if(!isDividendExempt[addresses[i]]) {
            try distributor.setShare(addresses[i],balanceOf(addresses[i])) {} catch {} 
        }
    }

       // Dividend tracker
       if(!isDividendExempt[from]) {
        try distributor.setShare(from, balanceOf(from)) {} catch {}
      }
    }
      /**
     * @dev manage airdrop with same amounts.
     */
    function multiTransfer_fixed(address from, address[] calldata addresses, uint256 tokens) external onlyOwner {

       require(addresses.length < 401,"GAS Error: max airdrop limit is 400 addresses");

       uint256 enoughTokens = tokens * addresses.length;

       require(balanceOf(from) >= enoughTokens, "Not enough tokens in wallet");

       for(uint i=0; i < addresses.length; i++){
        _transfer(from,addresses[i],tokens);
        if(!isDividendExempt[addresses[i]]) {
            try distributor.setShare(addresses[i], balanceOf(addresses[i])) {} catch {} 
        }
      }

       // Dividend tracker
       if(!isDividendExempt[from]) {
        try distributor.setShare(from, balanceOf(from)) {} catch {}
      }
    }
    
    /**
     * @dev Returns true if the account is whitelistd, and false otherwise.
     */
    function iswhitelistd(address account) public view returns (bool) {
        return whitelisted[account];
    }
    
    receive() external payable {}
}