// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @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() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        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 {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: @openzeppelin/contracts/token/ERC20/ERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.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 {}
}

// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.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);
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @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);
}

// File: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with 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;
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// 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;
        }
    }
}

// File: contracts/C12.sol



// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;

import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "./IUniswapV2Router02.sol";
import "./IUniswapV2Factory.sol";
import "./IUniswapV2Pair.sol";


contract C12 is Context, IERC20, Ownable {

    using SafeMath for uint256;

    string private constant _name = "Carbon 12";
    string private constant _symbol = "C12";
    uint8 private constant _decimals = 18;

    uint256 private buyLiquidityFee = 30;
    uint256 private buyRewardFee = 0;
    uint256 private buyGrowthFund = 20;
    uint256 private buyBurnFee = 0;

    uint256 private sellLiquidityFee = 20;
    uint256 private sellRewardFee = 30;
    uint256 private sellGrowthFund = 0;
    uint256 private sellBurnFee = 0;

    uint256 public totalBuy;
    uint256 public totalSell;

    uint256 private constant feeDenominator = 1000;

    address public GrowthFundWallet = 0xBE6ea4D57E095c53822d3F6319C0Af673811a51b;
    address public RewardWallet = 0x91Ff8A403724998e6CF78Ff9F468C11A8D9d8907;
    address public liquidityWallet;

    address private constant deadWallet = 0x000000000000000000000000000000000000dEaD;
    address private constant ZeroWallet = 0x0000000000000000000000000000000000000000;

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

    mapping (address => bool) private _isExcludedFromFees;
    mapping (address => bool) public automatedMarketMakerPairs;
    mapping (address => bool) public isWalletLimitExempt;
    mapping (address => bool) public isTxLimitExempt;
    
    uint256 public _totalSupply = 777_000_000 * (10 ** _decimals);
    uint256 public swapTokensAtAmount = 10000 * (10 ** _decimals);

    uint256 public _maxTxAmount = _totalSupply.mul(10).div(feeDenominator);     //10%
    uint256 public _walletMax = _totalSupply.mul(10).div(feeDenominator);    //10%

    bool public _autoSwapBack = true;
    bool public EnableTransactionLimit = false;
    bool public checkWalletLimit = false;
  
    address public pair;
    
    IUniswapV2Pair public pairContract;
    IUniswapV2Router02 public router;

    bool inSwap = false;

    modifier swapping() {
        inSwap = true;
        _;
        inSwap = false;
    }

    modifier validRecipient(address to) {
        require(to != address(0x0));
        _;
    }

    constructor() {

        router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); 

        pair = IUniswapV2Factory(router.factory()).createPair(
            router.WETH(),
            address(this)
        );

        _allowances[address(this)][address(router)] = ~uint256(0);

        pairContract = IUniswapV2Pair(pair);
        automatedMarketMakerPairs[pair] = true;
        
        liquidityWallet = address(msg.sender);
        
        isWalletLimitExempt[address(msg.sender)] = true;
        isWalletLimitExempt[pair] = true;
        isWalletLimitExempt[address(this)] = true;

        _isExcludedFromFees[address(msg.sender)] = true;
        _isExcludedFromFees[address(this)] = true;

        isTxLimitExempt[address(msg.sender)] = true;
        isTxLimitExempt[address(this)] = true;
            
        totalBuy = buyLiquidityFee.add(buyRewardFee).add(buyGrowthFund).add(buyBurnFee);
        totalSell = sellLiquidityFee.add(sellRewardFee).add(sellGrowthFund).add(sellBurnFee);

        _balances[address(msg.sender)] = _totalSupply;
        emit Transfer(address(0x0), address(msg.sender), _totalSupply);
    }

    function name() public pure returns (string memory) {
        return _name;
    }

    function symbol() public pure returns (string memory) {
        return _symbol;
    }

    function decimals() public pure returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }
   
    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function getCirculatingSupply() public view returns (uint256) {
        return
            _totalSupply.sub(_balances[deadWallet]).sub(_balances[ZeroWallet]);
    }

    function isNotInSwap() external view returns (bool) {
        return !inSwap;
    }

    function allowance(address owner_, address spender)
        external
        view
        override
        returns (uint256)
    {
        return _allowances[owner_][spender];
    }

    function checkFeeExempt(address _addr) external view returns (bool) {
        return _isExcludedFromFees[_addr];
    }

// ---------------------------------------------------------------------------- //

    function transfer(address to, uint256 value)
        external
        validRecipient(to)
        override
        returns (bool)
    {
        _transferFrom(msg.sender, to, value);
        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external validRecipient(to) override returns (bool) {
        
        if (_allowances[from][msg.sender] != ~uint256(0)) {
            _allowances[from][msg.sender] = _allowances[from][
                msg.sender
            ].sub(value, "Insufficient Allowance");
        }
        _transferFrom(from, to, value);
        return true;
    }

    function _basicTransfer(
        address from,
        address to,
        uint256 amount
    ) internal returns (bool) {
        _balances[from] = _balances[from].sub(amount);
        _balances[to] = _balances[to].add(amount);
        return true;
    }

    function _transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) internal returns (bool) {

        if(!isTxLimitExempt[sender] && !isTxLimitExempt[recipient] && EnableTransactionLimit) {
            require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
        }

        if (inSwap) {
            return _basicTransfer(sender, recipient, amount);
        }

        if (shouldSwapBack()) {
            swapBack();
        }
        
        _balances[sender] = _balances[sender].sub(amount);
        
        uint256 AmountReceived = shouldTakeFee(sender, recipient)
            ? takeFee(sender, recipient, amount)
            : amount;

        if(checkWalletLimit && !isWalletLimitExempt[recipient]) {
            require(balanceOf(recipient).add(AmountReceived) <= _walletMax);
        }

        _balances[recipient] = _balances[recipient].add(AmountReceived);

        emit Transfer(sender,recipient,AmountReceived);
        return true;
    }

    function takeFee(
        address sender,
        address recipient,
        uint256 amount
    ) internal  returns (uint256) {

        uint256 feeAmount;
       
        unchecked {
        
            if(automatedMarketMakerPairs[sender]){
                feeAmount = amount.mul(totalBuy).div(feeDenominator);
            }
            else if(automatedMarketMakerPairs[recipient]){
                feeAmount = amount.mul(totalSell).div(feeDenominator);
            }

            if(feeAmount > 0) {
                _balances[address(this)] = _balances[address(this)].add(feeAmount);
                emit Transfer(sender, address(this), feeAmount);
            }

            return amount.sub(feeAmount);
        }
        
    }

    function swapBack() internal swapping {
        
        uint contractBalance = balanceOf(address(this));
        uint totalShares = totalBuy.add(totalSell);

        if(contractBalance == 0 || totalShares == 0) return;

        uint _liquidityShare = buyLiquidityFee.add(sellLiquidityFee);
        uint _RewardShare = buyRewardFee.add(sellRewardFee); 
        // uint _GrowthShare = buyGrowthFund.add(sellGrowthFund);     
        uint _BurnShare = buyBurnFee.add(sellBurnFee);

        if (_BurnShare > 0) {
            uint tokenForBurn = contractBalance.mul(_BurnShare).div(totalShares);
            sendTokenWithoutFee(address(this),address(deadWallet),tokenForBurn);
            contractBalance = contractBalance.sub(tokenForBurn);
            totalShares = totalShares.sub(_BurnShare);
        }

        uint256 tokensForLP = contractBalance.mul(_liquidityShare).div(totalShares).div(2);
        uint256 tokensForSwap = contractBalance.sub(tokensForLP);

        uint256 initialBalance = address(this).balance;
        swapTokensForEth(tokensForSwap,address(this));
        uint256 amountReceived = address(this).balance.sub(initialBalance);

        uint256 totalETHFee = totalShares.sub(_liquidityShare.div(2));
        
        uint256 amountETHLiquidity = amountReceived.mul(_liquidityShare).div(totalETHFee).div(2);
        uint256 amountETHReward = amountReceived.mul(_RewardShare).div(totalETHFee);
        uint256 amountETHGrowth = amountReceived.sub(amountETHLiquidity).sub(amountETHReward);

        if(amountETHReward > 0) {
            payable(RewardWallet).transfer(amountETHReward);
        }
        if(amountETHGrowth > 0) {
            payable(GrowthFundWallet).transfer(amountETHGrowth);
        }
        if(amountETHLiquidity > 0) {
            addLiquidity(tokensForLP,amountETHLiquidity);
        }

    }

    function sendTokenWithoutFee(address _sender, address _recipient, uint256 _amount) private {
        _balances[_sender] = _balances[_sender].sub(_amount);
        _balances[_recipient] = _balances[_recipient].add(_amount);
        emit Transfer(_sender, _recipient, _amount);
    }

    function shouldTakeFee(address from, address to)
        internal
        view
        returns (bool)
    {
        if(_isExcludedFromFees[from] || _isExcludedFromFees[to]){
            return false;
        }        
        else{
            return (automatedMarketMakerPairs[from] || automatedMarketMakerPairs[to]);
        }
    }

    function shouldSwapBack() internal view returns (bool) {

        uint256 contractTokenBalance = balanceOf(address(this));
        bool canSwap = contractTokenBalance >= swapTokensAtAmount;

        return
            _autoSwapBack && 
            !inSwap && 
            canSwap &&
            !automatedMarketMakerPairs[msg.sender];
    }

// ---------------------------------------------------------------------------- //

    function decreaseAllowance(address spender, uint256 subtractedValue)
        external
        returns (bool)
    {
        uint256 oldValue = _allowances[msg.sender][spender];
        if (subtractedValue >= oldValue) {
            _allowances[msg.sender][spender] = 0;
        } else {
            _allowances[msg.sender][spender] = oldValue.sub(
                subtractedValue
            );
        }
        emit Approval(
            msg.sender,
            spender,
            _allowances[msg.sender][spender]
        );
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue)
        external
        returns (bool)
    {
        _allowances[msg.sender][spender] = _allowances[msg.sender][
            spender
        ].add(addedValue);
        emit Approval(
            msg.sender,
            spender,
            _allowances[msg.sender][spender]
        );
        return true;
    }

    function approve(address spender, uint256 value)
        external
        override
        returns (bool)
    {
        _approve(msg.sender,spender,value);
        return true;
    }

    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);
    }

    function setBuyFee(
            uint _newLp,
            uint _newReward,
            uint _newGrowth,
            uint _newBurn
        ) public onlyOwner {
        buyLiquidityFee = _newLp;
        buyRewardFee = _newReward;
        buyGrowthFund = _newGrowth;
        buyBurnFee = _newBurn;
        totalBuy = buyLiquidityFee.add(buyRewardFee).add(buyGrowthFund).add(buyBurnFee);
    }

    function setSellFee(
            uint _newLp,
            uint _newReward,
            uint _newGrowth,
            uint _newBurn
        ) public onlyOwner {
        sellLiquidityFee = _newLp;
        sellRewardFee = _newReward;
        sellGrowthFund = _newGrowth;
        sellBurnFee = _newBurn;
        totalSell = sellLiquidityFee.add(sellRewardFee).add(sellGrowthFund).add(sellBurnFee);
    }

    function setMaxWalletLimit(uint _percent) public onlyOwner {
        _maxTxAmount = _totalSupply.mul(_percent).div(feeDenominator); 
    }

    function setMaxTxLimit(uint _percent) public onlyOwner {
        _walletMax = _totalSupply.mul(_percent).div(feeDenominator); 
    }

    function enableDisableTxLimit(bool _status) public onlyOwner {
        EnableTransactionLimit = _status;
    }

    function enableDisableWalletLimit(bool _status) public onlyOwner {
        checkWalletLimit = _status;
    }

    function clearStuckBalance(address _receiver) external onlyOwner {
        uint256 balance = address(this).balance;
        (bool os,) = payable(_receiver).call{value: balance}("");
        if(os){}
    }

    function rescueToken(address tokenAddress,address _receiver, uint256 tokens) external onlyOwner returns (bool success){
        return IERC20(tokenAddress).transfer(_receiver, tokens);
    }

    function setGrowthWallet(address _newWallet) public onlyOwner {
        GrowthFundWallet = _newWallet;
    }

    function setLiquidityWallet(address _newWallet) public onlyOwner {
        liquidityWallet = _newWallet;
    }

    function setRewardWallet(address _newWallet) public onlyOwner {
        RewardWallet = _newWallet;
    }

    function manualSync() external onlyOwner {
        IUniswapV2Pair(pairContract).sync();
    }

    function setLP(address _address) external onlyOwner {
        pairContract = IUniswapV2Pair(_address);
    }

    function setAutomaticPairMarket(address _addr,bool _status) public onlyOwner {
        if(_status) {
            require(!automatedMarketMakerPairs[_addr],"Pair Already Set!!");
        }
        automatedMarketMakerPairs[_addr] = _status;
        isWalletLimitExempt[_addr] = true;
    }

    function setWhitelistFee(address _addr,bool _status) external onlyOwner {
        require(_isExcludedFromFees[_addr] != _status, "Error: Not changed");
        _isExcludedFromFees[_addr] = _status;
    }

    function setMinSwapAmount(uint _value) external onlyOwner {
        swapTokensAtAmount = _value;
    }

    function setAutoSwapBack(bool _flag) external onlyOwner {
        if(_flag) {
            _autoSwapBack = _flag;
        } else {
            _autoSwapBack = _flag;
        }
    }

    function addLiquidity(uint256 tokenAmount, uint256 EthAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(router), tokenAmount);
        // add the liquidity
        router.addLiquidityETH{value: EthAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            liquidityWallet,
            block.timestamp
        );

    }

    function swapTokensForEth(uint256 tokenAmount,address _recipient) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = router.WETH();

        _approve(address(this), address(router), tokenAmount);

        // make the swap
        router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(_recipient),
            block.timestamp
        );

    }

    receive() external payable {}

}

// File: contracts/IUniswapV2Factory.sol



// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);
    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function createPair(address tokenA, address tokenB) external returns (address pair);
}
// File: contracts/IUniswapV2Pair.sol



// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;

interface IUniswapV2Pair {
    event Sync(uint112 reserve0, uint112 reserve1);
    function sync() external;
}
// File: contracts/IUniswapV2Router01.sol



// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;

interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
// File: contracts/IUniswapV2Router02.sol



// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;

import "./IUniswapV2Router01.sol";

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}