// 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/interfaces/IERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol)

pragma solidity ^0.8.0;

import "../token/ERC20/IERC20.sol";

// File: @openzeppelin/contracts/security/ReentrancyGuard.sol



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

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

// 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/token/ERC721/IERC721Receiver.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// 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: @uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol



pragma solidity >=0.5.0;

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;
}

// File: @uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol



pragma solidity >=0.5.0;

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;
}

// File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol



pragma solidity >=0.6.2;

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);
}

// File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol



pragma solidity >=0.6.2;

import './IUniswapV2Router01.sol';

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;
}

// File: contracts/streetmachine/interfaces/external/INonfungiblePositionManager.sol



// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.13;

interface INonfungiblePositionManager {
    struct MintParams {
        address token0;
        address token1;
        uint24 fee;
        int24 tickLower;
        int24 tickUpper;
        uint256 amount0Desired;
        uint256 amount1Desired;
        uint256 amount0Min;
        uint256 amount1Min;
        address recipient;
        uint256 deadline;
    }
    struct CollectParams {
        uint256 tokenId;
        address recipient;
        uint128 amount0Max;
        uint128 amount1Max;
    }
    function mint(MintParams calldata params) external payable returns (uint256 tokenId, uint128 liquidity, uint256 amount0, uint256 amount1);
    function collect(CollectParams calldata params) external payable returns (uint256 amount0, uint256 amount1);
}
// File: contracts/streetmachine/interfaces/external/IWETH9.sol



// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.13;

import "@openzeppelin/contracts/interfaces/IERC20.sol";

interface IWETH9 is IERC20 {
    function deposit() external payable;
    function withdraw(uint256) external;
}
// File: contracts/streetmachine/interfaces/ILPFeeReceiver.sol



// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.0;

interface ILPFeeReceiver {
    function depositYield() external payable;
}
// File: contracts/streetmachine/SMC.sol



// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.13;

// https://street-machine.com
// https://t.me/streetmachineportal
// https://twitter.com/erc_arcade

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "./interfaces/external/IWETH9.sol";
import "./interfaces/external/INonfungiblePositionManager.sol";
import "./interfaces/ILPFeeReceiver.sol";
import '@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol';
import '@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol';
import '@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol';

contract SMC is ERC20, IERC721Receiver, Ownable, ReentrancyGuard {
    uint256 private constant PERCENT_DENOMENATOR = 1000;
    address private constant DEAD = address(0xdead);

    uint64 public deadblocks = 0;
    bool private _addingLP;

    address public _lpReceiver;
    address public _treasury;
    address public _houseLiquidity;
    address public _smcWallet;

    mapping(address => bool) private _isTaxExcluded;
    mapping(address => bool) private _isLimitless;

    uint256 public taxLp = (PERCENT_DENOMENATOR * 0) / 100;
    uint256 public taxTreasury = (PERCENT_DENOMENATOR * 4) / 100;
    uint256 public taxSMC = (PERCENT_DENOMENATOR * 1) / 100;
    uint256 public taxHouse = (PERCENT_DENOMENATOR * 1) / 100;
    uint256 public additionalSellTax = (PERCENT_DENOMENATOR * 0) / 100;

    uint256 public maxTx = (PERCENT_DENOMENATOR * 2) / 1000;
    uint256 public maxWallet = (PERCENT_DENOMENATOR * 2) / 1000;
    bool public enableLimits = true;

    uint256 private _totalTax;


    uint256 private _liquifyRate = (PERCENT_DENOMENATOR * 1) / 100;
    uint256 public launchTime;
    uint256 private _launchBlock;

    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;

    mapping(address => bool) private _isBot;

    bool private _swapEnabled = true;
    bool private _swapping = false;

    modifier swapLock() {
        _swapping = true;
        _;
        _swapping = false;
    }


    error TokenIdNotSet();

    address public immutable WETH;
    IWETH9 public immutable weth;
    INonfungiblePositionManager public immutable nonfungiblePositionManager;
    ILPFeeReceiver public lpFeeReceiver;

    uint256 public tokenId;

    uint256 public amount0Collected;
    uint256 public amount1Collected;

    event FeesCollected(uint256 indexed _amount0, uint256 indexed _amount1, address _lpFeeReceiver, uint256 indexed _timestamp);

    constructor (address _WETH, address _nonfungiblePositionManager) ERC20(unicode"Street Machine 街道机器", "SMC") {
        WETH = _WETH;
        weth = IWETH9(_WETH);
        nonfungiblePositionManager = INonfungiblePositionManager(_nonfungiblePositionManager);


        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(
            address(this),
            _uniswapV2Router.WETH()
        );
        _treasury = address(0x242C5D0E38b856c0C6AA1D889A31E536483e2e92);
        _houseLiquidity = address(0x37DE7Be917F70800a3490B9dF5D705F0136D0aD7);
        _smcWallet = address(0x03E07F496ecb6EFAC29299E733d2056EB35ac3A2);
        uniswapV2Router = _uniswapV2Router;
        _setTotalTax();
        _lpReceiver = owner();
        _isTaxExcluded[address(this)] = true;
        _isTaxExcluded[msg.sender] = true;
        _isLimitless[address(this)] = true;
        _isLimitless[msg.sender] = true;


        setIsTaxExcluded(0x356815f53d5DFa738E5a38ffB261afa8731e45Be, true); //fostering partnership synergies
        setIsTaxExcluded(0x60e18f804FF8aB716b83ee65D2893B292481911F, true); //cross-chain bridging
        setIsTaxExcluded(0x25d2FCd5759C3B822672B4d78faf1e7DC350b2B5, true); //philanthropy
        setIsTaxExcluded(0x8Bf164d2aDf1167f9611B8067D1a845f89cdeA61, true); //House Wallet 1
        setIsTaxExcluded(0x7B85429fa9E1c7F83B2Cb3Ca4Be367Decb708886, true); //House Wallet 2
        setIsTaxExcluded(0x49Fb0C8877BE9D3661c5aD96b64abD5918fC18Aa, true); //Shills
        setIsTaxExcluded(0x242C5D0E38b856c0C6AA1D889A31E536483e2e92, true); //Treasury


        _isBot[0xdB5889E35e379Ef0498aaE126fc2CCE1fbD23216] = true;
        _isBot[0x3999D2c5207C06BBC5cf8A6bEa52966cabB76d41] = true;

        _mint(_msgSender(), 100_000_000 * (10**18));
    }

    function launch() external onlyOwner {
        require(launchTime == 0, 'already launched');
        deadblocks = 0;
        launchTime = block.timestamp;
        _launchBlock = block.number;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual override {
        bool _isOwner = sender == owner() || recipient == owner();
        if (launchTime == 0) {
            require(_isLimitless[sender], "Token not launched");
        }
        uint256 contractTokenBalance = balanceOf(address(this));
        bool _isBuy = sender == uniswapV2Pair && recipient != address(uniswapV2Router);
        bool _isSell = recipient == uniswapV2Pair;
        bool _isSwap = _isBuy || _isSell;
        if (_isSwap && enableLimits) {
            bool _skipCheck = _addingLP || _isLimitless[recipient] || _isLimitless[sender];
            uint256 _maxTx = totalSupply() * maxTx / PERCENT_DENOMENATOR;
            require(_maxTx >= amount || _skipCheck, "Tx amount exceed limit");
            if (_isBuy) {
                uint256 _maxWallet = totalSupply() * maxWallet / PERCENT_DENOMENATOR;
                require(_maxWallet >= balanceOf(recipient) + amount || _skipCheck, "Total amount exceed wallet limit");
            }
        }
        if (_isBuy) {
            if (block.number < _launchBlock + deadblocks) {
                _isBot[recipient] = true;
            }
        } else {
            require(!_isBot[recipient], 'Stop botting!');
            require(!_isBot[sender], 'Stop botting!');
            require(!_isBot[_msgSender()], 'Stop botting!');
        }
        uint256 _minSwap = (balanceOf(uniswapV2Pair) * _liquifyRate) / PERCENT_DENOMENATOR;
        bool _overMin = contractTokenBalance >= _minSwap;
        if (_swapEnabled && !_swapping && !_isOwner && _overMin && launchTime != 0 && sender != uniswapV2Pair) {
            _swap(_minSwap, _isSell);
        }
        uint256 tax = 0;
        if (launchTime != 0 && _isSwap && !(_isTaxExcluded[sender] || _isTaxExcluded[recipient])) {
            tax = (amount * calcTotalTax(_isSell)) / PERCENT_DENOMENATOR;
            if (tax > 0) {
                super._transfer(sender, address(this), tax);
            }
        }
        super._transfer(sender, recipient, amount - tax);
    }

    function _swap(uint256 _amountToSwap, bool isSell) private swapLock {
        uint256 balBefore = address(this).balance;
        uint256 liquidityTokens = 0;
        if (calcTotalTax(isSell) > 0) {
            liquidityTokens = (_amountToSwap * taxLp) / calcTotalTax(isSell) / 2;
        }
        uint256 tokensToSwap = _amountToSwap - liquidityTokens;

        _swapTokensForEth(tokensToSwap);

        uint256 balToProcess = address(this).balance - balBefore;
        if (balToProcess > 0) {
            _processFees(balToProcess, liquidityTokens, isSell);
        }
    }

    function _swapTokensForEth(uint256 tokensToSwap) private {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();

        _approve(address(this), address(uniswapV2Router), tokensToSwap);
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokensToSwap,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

    function _addLp(uint256 tokenAmount, uint256 ethAmount, address receiver) private {
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.addLiquidityETH{value : ethAmount}(
            address(this),
            tokenAmount,
            0,
            0,
            receiver,
            block.timestamp
        );
    }


    function _processFees(uint256 amountETH, uint256 amountLpTokens, bool isSell) private {
        uint256 lpETH = 0;
        if (calcTotalTax(isSell) > 0) {
            lpETH = (amountETH * taxLp) / calcTotalTax(isSell);
        }
        if (amountLpTokens > 0 && lpETH > 0) {
            _addLp(amountLpTokens, lpETH, _lpReceiver);
        }
        if (address(this).balance > 0) {
            uint256 totalTax = taxTreasury + taxHouse + taxSMC;
            uint256 balance = address(this).balance;
            uint256 taxTreasuryAmount = balance * taxTreasury / totalTax;
            uint256 taxSMCAmount = balance * taxSMC / totalTax;
            uint256 taxHouseAmount = balance * taxHouse / totalTax;
            payable(_treasury).transfer(taxTreasuryAmount);
            payable(_houseLiquidity).transfer(taxHouseAmount);
            payable(_smcWallet).transfer(taxSMCAmount);
        }
    }

    function isBotBlacklisted(address account) external view returns (bool) {
        return _isBot[account];
    }

    function blacklistBot(address account) external onlyOwner {
        require(account != address(uniswapV2Router), 'cannot blacklist router');
        require(account != uniswapV2Pair, 'cannot blacklist pair');
        require(!_isBot[account], 'user is already blacklisted');
        _isBot[account] = true;
    }

    function forgiveBot(address account) external onlyOwner {
        _isBot[account] = false;
    }

    function calcTotalTax(bool isSell) private returns (uint256) {
        if (isSell) {
            return _totalTax + additionalSellTax;
        }
        return _totalTax;
    }

    function _setTotalTax() private {
        if (taxLp + taxTreasury + taxHouse + taxSMC >= _totalTax) {
            require(taxLp + taxTreasury + taxHouse + taxSMC <= (PERCENT_DENOMENATOR * 25) / 100, 'tax cannot be above 25%');
        }
        _totalTax = taxLp + taxTreasury + taxHouse + taxSMC;
    }

    function setAdditionalSellTax(uint256 _tax) external onlyOwner {
        if (_tax >= additionalSellTax) {
            require(_tax <= (PERCENT_DENOMENATOR * 25) / 100, 'additionalSellTax cannot be above 25%');
        }
        additionalSellTax = _tax;
    }

    function setTaxLp(uint256 _tax) external onlyOwner {
        taxLp = _tax;
        _setTotalTax();
    }

    function setMaxWallet(uint256 _maxWallet) external onlyOwner {
        require(_maxWallet >= 1, 'max wallet cannot be below 0.1%');
        maxWallet = _maxWallet;
    }

    function setMaxTx(uint256 _maxTx) external onlyOwner {
        require(_maxTx >= 1, 'max tx cannot be below 0.1%');
        maxTx = _maxTx;
    }

    function setTax(uint256 _taxTreasury, uint256 _taxHouse, uint256 _taxSMC) external onlyOwner {
        taxTreasury = _taxTreasury;
        taxHouse = _taxHouse;
        taxSMC = _taxSMC;
        _setTotalTax();
    }

    function setLpReceiver(address _wallet) external onlyOwner {
        _lpReceiver = _wallet;
    }

    function setEnableLimits(bool _enable) external onlyOwner {
        enableLimits = _enable;
    }

    function setLiquifyRate(uint256 _rate) external onlyOwner {
        require(_rate <= PERCENT_DENOMENATOR / 10, 'cannot be more than 10%');
        _liquifyRate = _rate;
    }

    function setIsTaxExcluded(address _wallet, bool _isExcluded) public onlyOwner {
        _isTaxExcluded[_wallet] = _isExcluded;
        _isLimitless[_wallet] = _isExcluded;
    }


    function setSwapEnabled(bool _enabled) external onlyOwner {
        _swapEnabled = _enabled;
    }

    function forceSwap() external swapLock {
        _swapTokensForEth(balanceOf(address(this)));
        (bool success,) = address(_treasury).call{value : address(this).balance}("");
    }

    function forceSend() external {
        (bool success,) = address(_treasury).call{value : address(this).balance}("");
    }

    function claim() external nonReentrant {
        if (tokenId == 0) {
            revert TokenIdNotSet();
        }

        (uint256 _amount0, uint256 _amount1) = nonfungiblePositionManager.collect(INonfungiblePositionManager.CollectParams({
            tokenId: tokenId,
            recipient: address(this),
            amount0Max: type(uint128).max,
            amount1Max: type(uint128).max
        }));

        _burn(address(this), _amount0);
        weth.withdraw(_amount1);

        lpFeeReceiver.depositYield{value: address(this).balance}();

        amount0Collected += _amount0;
        amount1Collected += _amount1;
        emit FeesCollected(_amount0, _amount1, address(lpFeeReceiver), block.timestamp);
    }

    function burnFrom(address account, uint256 amount) public virtual {
        _spendAllowance(account, _msgSender(), amount);
        _burn(account, amount);
    }

    function setLPFeeReceiver(address _lpFeeReceiver) external nonReentrant onlyOwner {
        lpFeeReceiver = ILPFeeReceiver(_lpFeeReceiver);
    }

    function setTokenId(uint256 _tokenId) external nonReentrant onlyOwner {
        tokenId = _tokenId;
    }

    function getLPFeeReceiver() external view returns (address) {
        return address(lpFeeReceiver);
    }

    function getTokenId() external view returns (uint256) {
        return tokenId;
    }

    function getAmount0Collected() external view returns (uint256) {
        return amount0Collected;
    }

    function getAmount1Collected() external view returns (uint256) {
        return amount1Collected;
    }

    function onERC721Received(address, address, uint256, bytes calldata) external override returns (bytes4) {
        return this.onERC721Received.selector;
    }

    receive() external payable {}
}