// File: contracts/BoxBet.sol



/**
    BoxBet

    Website: boxbet.app
    Twitter: x.com/BoxBetApp
    Telegram Bot: t.me/BoxBetApp_Bot

**/

// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;
pragma experimental ABIEncoderV2;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
  function _msgSender() internal view virtual returns (address) {
    return msg.sender;
  }

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

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

  /**
   * @dev Throws if called by any account other than the owner.
     */
  modifier onlyOwner() {
    require(owner() == _msgSender(), "Ownable: caller is not the owner");
    _;
  }

  /**
   * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
  function renounceOwnership() public virtual onlyOwner {
    _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);
  }
}

////// lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol)

/* pragma solidity ^0.8.0; */

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
  /**
   * @dev Returns the amount of tokens in existence.
     */
  function totalSupply() external view returns (uint256);

  /**
   * @dev Returns the amount of tokens owned by `account`.
     */
  function balanceOf(address account) external view returns (uint256);

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

  /**
   * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
  function allowance(address owner, address spender) external view returns (uint256);

  /**
   * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
  function approve(address spender, uint256 amount) external returns (bool);

  /**
   * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
  function transferFrom(
    address sender,
    address recipient,
    uint256 amount
  ) external returns (bool);

  /**
   * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
  event Transfer(address indexed from, address indexed to, uint256 value);

  /**
   * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

////// lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.0 (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);
}

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin 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:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
  function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
    _transfer(_msgSender(), recipient, amount);
    return true;
  }

  /**
   * @dev See {IERC20-allowance}.
     */
  function allowance(address owner, address spender) public view virtual override returns (uint256) {
    return _allowances[owner][spender];
  }

  /**
   * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
  function approve(address spender, uint256 amount) public virtual override returns (bool) {
    _approve(_msgSender(), spender, amount);
    return true;
  }

  /**
   * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
  function transferFrom(
    address sender,
    address recipient,
    uint256 amount
  ) public virtual override returns (bool) {
    _transfer(sender, recipient, amount);

    uint256 currentAllowance = _allowances[sender][_msgSender()];
    require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
    unchecked {
      _approve(sender, _msgSender(), currentAllowance - amount);
    }

    return true;
  }

  /**
   * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
  function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
    _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
    return true;
  }

  /**
   * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
  function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
    uint256 currentAllowance = _allowances[_msgSender()][spender];
    require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
    unchecked {
      _approve(_msgSender(), spender, currentAllowance - subtractedValue);
    }

    return true;
  }

  /**
   * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
  function _transfer(
    address sender,
    address recipient,
    uint256 amount
  ) internal virtual {
    require(sender != address(0), "ERC20: transfer from the zero address");
    require(recipient != address(0), "ERC20: transfer to the zero address");

    _beforeTokenTransfer(sender, recipient, amount);

    uint256 senderBalance = _balances[sender];
    require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
    unchecked {
      _balances[sender] = senderBalance - amount;
    }
    _balances[recipient] += amount;

    emit Transfer(sender, recipient, amount);

    _afterTokenTransfer(sender, recipient, amount);
  }

  /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
  function _mint(address account, uint256 amount) internal virtual {
    require(account != address(0), "ERC20: mint to the zero address");

    _beforeTokenTransfer(address(0), account, amount);

    _totalSupply += amount;
    _balances[account] += amount;
    emit Transfer(address(0), account, amount);

    _afterTokenTransfer(address(0), account, amount);
  }

  /**
   * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
  function _burn(address account, uint256 amount) internal virtual {
    require(account != address(0), "ERC20: burn from the zero address");

    _beforeTokenTransfer(account, address(0), amount);

    uint256 accountBalance = _balances[account];
    require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
    unchecked {
      _balances[account] = accountBalance - amount;
    }
    _totalSupply -= amount;

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

    _afterTokenTransfer(account, address(0), amount);
  }

  /**
   * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
  function _approve(
    address owner,
    address spender,
    uint256 amount
  ) internal virtual {
    require(owner != address(0), "ERC20: approve from the zero address");
    require(spender != address(0), "ERC20: approve to the zero address");

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

  /**
   * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
  function _beforeTokenTransfer(
    address from,
    address to,
    uint256 amount
  ) internal virtual {}

  /**
   * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
  function _afterTokenTransfer(
    address from,
    address to,
    uint256 amount
  ) internal virtual {}
}

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

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

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

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

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

  /**
   * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    return a - b;
  }

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

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

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

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

  /**
   * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
  function div(
    uint256 a,
    uint256 b,
    string memory errorMessage
  ) internal pure returns (uint256) {
    unchecked {
      require(b > 0, errorMessage);
      return a / b;
    }
  }

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

interface IUniswapV2Factory {
  event PairCreated(
    address indexed token0,
    address indexed token1,
    address pair,
    uint256
  );

  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(uint256) external view returns (address pair);

  function allPairsLength() external view returns (uint256);

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

  function setFeeTo(address) external;

  function setFeeToSetter(address) external;
}

////// src/IUniswapV2Pair.sol
/* pragma solidity 0.8.10; */
/* pragma experimental ABIEncoderV2; */

interface IUniswapV2Pair {
  event Approval(
    address indexed owner,
    address indexed spender,
    uint256 value
  );
  event Transfer(address indexed from, address indexed to, uint256 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 (uint256);

  function balanceOf(address owner) external view returns (uint256);

  function allowance(address owner, address spender)
  external
  view
  returns (uint256);

  function approve(address spender, uint256 value) external returns (bool);

  function transfer(address to, uint256 value) external returns (bool);

  function transferFrom(
    address from,
    address to,
    uint256 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 (uint256);

  function permit(
    address owner,
    address spender,
    uint256 value,
    uint256 deadline,
    uint8 v,
    bytes32 r,
    bytes32 s
  ) external;

  event Mint(address indexed sender, uint256 amount0, uint256 amount1);
  event Burn(
    address indexed sender,
    uint256 amount0,
    uint256 amount1,
    address indexed to
  );
  event Swap(
    address indexed sender,
    uint256 amount0In,
    uint256 amount1In,
    uint256 amount0Out,
    uint256 amount1Out,
    address indexed to
  );
  event Sync(uint112 reserve0, uint112 reserve1);

  function MINIMUM_LIQUIDITY() external pure returns (uint256);

  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 (uint256);

  function price1CumulativeLast() external view returns (uint256);

  function kLast() external view returns (uint256);

  function mint(address to) external returns (uint256 liquidity);

  function burn(address to)
  external
  returns (uint256 amount0, uint256 amount1);

  function swap(
    uint256 amount0Out,
    uint256 amount1Out,
    address to,
    bytes calldata data
  ) external;

  function skim(address to) external;

  function sync() external;

  function initialize(address, address) external;
}

interface IUniswapV2Router02 {
  function factory() external pure returns (address);

  function WETH() external pure returns (address);

  function addLiquidity(
    address tokenA,
    address tokenB,
    uint256 amountADesired,
    uint256 amountBDesired,
    uint256 amountAMin,
    uint256 amountBMin,
    address to,
    uint256 deadline
  )
  external
  returns (
    uint256 amountA,
    uint256 amountB,
    uint256 liquidity
  );

  function addLiquidityETH(
    address token,
    uint256 amountTokenDesired,
    uint256 amountTokenMin,
    uint256 amountETHMin,
    address to,
    uint256 deadline
  )
  external
  payable
  returns (
    uint256 amountToken,
    uint256 amountETH,
    uint256 liquidity
  );

  function swapExactTokensForTokensSupportingFeeOnTransferTokens(
    uint256 amountIn,
    uint256 amountOutMin,
    address[] calldata path,
    address to,
    uint256 deadline
  ) external;

  function swapExactETHForTokensSupportingFeeOnTransferTokens(
    uint256 amountOutMin,
    address[] calldata path,
    address to,
    uint256 deadline
  ) external payable;

  function swapExactTokensForETHSupportingFeeOnTransferTokens(
    uint256 amountIn,
    uint256 amountOutMin,
    address[] calldata path,
    address to,
    uint256 deadline
  ) external;
}

contract BoxBet is ERC20, Ownable {
  using SafeMath for uint256;

  IUniswapV2Router02 public immutable uniswapV2Router;
  address public immutable uniswapV2Pair;
  address public constant deadAddress = address(0xdead);

  bool private swapping;

  address public revShareWallet;
  address public teamWallet;

  uint256 public maxTransactionAmount;
  uint256 public swapTokensAtAmount;
  uint256 public maxWallet;

  bool public limitsInEffect = true;
  bool public tradingActive = false;
  bool public swapEnabled = false;

  bool public blacklistRenounced = false;

  // Anti-bot and anti-whale mappings and variables
  mapping(address => bool) blacklisted;

  uint256 public buyTotalFees;
  uint256 public buyRevShareFee;
  uint256 public buyLiquidityFee;
  uint256 public buyTeamFee;

  uint256 public sellTotalFees;
  uint256 public sellRevShareFee;
  uint256 public sellLiquidityFee;
  uint256 public sellTeamFee;

  uint256 public tokensForRevShare;
  uint256 public tokensForLiquidity;
  uint256 public tokensForTeam;

  /******************/

  // exclude from fees and max transaction amount
  mapping(address => bool) private _isExcludedFromFees;
  mapping(address => bool) public _isExcludedMaxTransactionAmount;

  // store addresses that a automatic market maker pairs. Any transfer *to* these addresses
  // could be subject to a maximum transfer amount
  mapping(address => bool) public automatedMarketMakerPairs;

  bool public preMigrationPhase = true;
  mapping(address => bool) public preMigrationTransferrable;

  event UpdateUniswapV2Router(
    address indexed newAddress,
    address indexed oldAddress
  );

  event ExcludeFromFees(address indexed account, bool isExcluded);

  event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);

  event revShareWalletUpdated(
    address indexed newWallet,
    address indexed oldWallet
  );

  event teamWalletUpdated(
    address indexed newWallet,
    address indexed oldWallet
  );

  event SwapAndLiquify(
    uint256 tokensSwapped,
    uint256 ethReceived,
    uint256 tokensIntoLiquidity
  );

  constructor() ERC20("BoxBet", "BXBT") {
    IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
      0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
    );

    excludeFromMaxTransaction(address(_uniswapV2Router), true);
    uniswapV2Router = _uniswapV2Router;

    uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
      .createPair(address(this), _uniswapV2Router.WETH());
    excludeFromMaxTransaction(address(uniswapV2Pair), true);
    _setAutomatedMarketMakerPair(address(uniswapV2Pair), true);

    uint256 _buyRevShareFee = 4;
    uint256 _buyLiquidityFee = 1;
    uint256 _buyTeamFee = 0;

    uint256 _sellRevShareFee = 4;
    uint256 _sellLiquidityFee = 1;
    uint256 _sellTeamFee = 0;

    uint256 totalSupply = 100_000_000 * 1e18;

    maxTransactionAmount = 1_000_000 * 1e18; // 1%
    maxWallet = 1_000_000 * 1e18; // 1%
    swapTokensAtAmount = (totalSupply * 5) / 1_000_000; // 0.05%

    buyRevShareFee = _buyRevShareFee;
    buyLiquidityFee = _buyLiquidityFee;
    buyTeamFee = _buyTeamFee;
    buyTotalFees = buyRevShareFee + buyLiquidityFee + buyTeamFee;

    sellRevShareFee = _sellRevShareFee;
    sellLiquidityFee = _sellLiquidityFee;
    sellTeamFee = _sellTeamFee;
    sellTotalFees = sellRevShareFee + sellLiquidityFee + sellTeamFee;

    revShareWallet = address(0x754C25d0BD6a614AE8A306Aa5B2dAD765B476024); // set as revShare wallet
    teamWallet = owner(); // set as team wallet

    // exclude from paying fees or having max transaction amount
    excludeFromFees(owner(), true);
    excludeFromFees(address(this), true);
    excludeFromFees(address(0xdead), true);

    excludeFromMaxTransaction(owner(), true);
    excludeFromMaxTransaction(address(this), true);
    excludeFromMaxTransaction(address(0xdead), true);

    preMigrationTransferrable[owner()] = true;

    /*
        _mint is an internal function in ERC20.sol that is only called here,
        and CANNOT be called ever again
    */
    _mint(msg.sender, totalSupply);
  }

  receive() external payable {}

  // once enabled, can never be turned off
  function enableTrading() external onlyOwner {
    tradingActive = true;
    swapEnabled = true;
    preMigrationPhase = false;
  }

  // remove limits after token is stable
  function removeLimits() external onlyOwner returns (bool) {
    limitsInEffect = false;
    return true;
  }

  // change the minimum amount of tokens to sell from fees
  function updateSwapTokensAtAmount(uint256 newAmount)
  external
  onlyOwner
  returns (bool)
  {
    require(
      newAmount >= (totalSupply() * 1) / 100_000,
      "Swap amount cannot be lower than 0.001% total supply."
    );
    require(
      newAmount <= (totalSupply() * 5) / 1000,
      "Swap amount cannot be higher than 0.5% total supply."
    );
    swapTokensAtAmount = newAmount;
    return true;
  }

  function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
    require(
      newNum >= ((totalSupply() * 5) / 1000) / 1e18,
      "Cannot set maxTransactionAmount lower than 0.5%"
    );
    maxTransactionAmount = newNum * (10**18);
  }

  function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
    require(
      newNum >= ((totalSupply() * 10) / 1000) / 1e18,
      "Cannot set maxWallet lower than 1.0%"
    );
    maxWallet = newNum * (10**18);
  }

  function excludeFromMaxTransaction(address updAds, bool isEx)
  public
  onlyOwner
  {
    _isExcludedMaxTransactionAmount[updAds] = isEx;
  }

  // only use to disable contract sales if absolutely necessary (emergency use only)
  function updateSwapEnabled(bool enabled) external onlyOwner {
    swapEnabled = enabled;
  }

  function updateBuyFees(
    uint256 _revShareFee,
    uint256 _liquidityFee,
    uint256 _teamFee
  ) external onlyOwner {
    buyRevShareFee = _revShareFee;
    buyLiquidityFee = _liquidityFee;
    buyTeamFee = _teamFee;
    buyTotalFees = buyRevShareFee + buyLiquidityFee + buyTeamFee;
    require(buyTotalFees <= 5, "Buy fees must be <= 5.");
  }

  function updateSellFees(
    uint256 _revShareFee,
    uint256 _liquidityFee,
    uint256 _teamFee
  ) external onlyOwner {
    sellRevShareFee = _revShareFee;
    sellLiquidityFee = _liquidityFee;
    sellTeamFee = _teamFee;
    sellTotalFees = sellRevShareFee + sellLiquidityFee + sellTeamFee;
    require(sellTotalFees <= 5, "Sell fees must be <= 5.");
  }

  function excludeFromFees(address account, bool excluded) public onlyOwner {
    _isExcludedFromFees[account] = excluded;
    emit ExcludeFromFees(account, excluded);
  }

  function setAutomatedMarketMakerPair(address pair, bool value)
  public
  onlyOwner
  {
    require(
      pair != uniswapV2Pair,
      "The pair cannot be removed from automatedMarketMakerPairs"
    );

    _setAutomatedMarketMakerPair(pair, value);
  }

  function _setAutomatedMarketMakerPair(address pair, bool value) private {
    automatedMarketMakerPairs[pair] = value;

    emit SetAutomatedMarketMakerPair(pair, value);
  }

  function updateRevShareWallet(address newRevShareWallet) external onlyOwner {
    emit revShareWalletUpdated(newRevShareWallet, revShareWallet);
    revShareWallet = newRevShareWallet;
  }

  function updateTeamWallet(address newWallet) external onlyOwner {
    emit teamWalletUpdated(newWallet, teamWallet);
    teamWallet = newWallet;
  }

  function isExcludedFromFees(address account) public view returns (bool) {
    return _isExcludedFromFees[account];
  }

  function isBlacklisted(address account) public view returns (bool) {
    return blacklisted[account];
  }

  function _transfer(
    address from,
    address to,
    uint256 amount
  ) internal override {
    require(from != address(0), "ERC20: transfer from the zero address");
    require(to != address(0), "ERC20: transfer to the zero address");
    require(!blacklisted[from],"Sender blacklisted");
    require(!blacklisted[to],"Receiver blacklisted");

    if (preMigrationPhase) {
      require(preMigrationTransferrable[from], "Not authorized to transfer pre-migration.");
    }

    if (amount == 0) {
      super._transfer(from, to, 0);
      return;
    }

    if (limitsInEffect) {
      if (
        from != owner() &&
        to != owner() &&
        to != address(0) &&
        to != address(0xdead) &&
        !swapping
      ) {
        if (!tradingActive) {
          require(
            _isExcludedFromFees[from] || _isExcludedFromFees[to],
            "Trading is not active."
          );
        }

        //when buy
        if (
          automatedMarketMakerPairs[from] &&
          !_isExcludedMaxTransactionAmount[to]
        ) {
          require(
            amount <= maxTransactionAmount,
            "Buy transfer amount exceeds the maxTransactionAmount."
          );
          require(
            amount + balanceOf(to) <= maxWallet,
            "Max wallet exceeded"
          );
        }
          //when sell
        else if (
          automatedMarketMakerPairs[to] &&
          !_isExcludedMaxTransactionAmount[from]
        ) {
          require(
            amount <= maxTransactionAmount,
            "Sell transfer amount exceeds the maxTransactionAmount."
          );
        } else if (!_isExcludedMaxTransactionAmount[to]) {
          require(
            amount + balanceOf(to) <= maxWallet,
            "Max wallet exceeded"
          );
        }
      }
    }

    uint256 contractTokenBalance = balanceOf(address(this));

    bool canSwap = contractTokenBalance >= swapTokensAtAmount;

    if (
      canSwap &&
      swapEnabled &&
      !swapping &&
      !automatedMarketMakerPairs[from] &&
      !_isExcludedFromFees[from] &&
      !_isExcludedFromFees[to]
    ) {
      swapping = true;

      swapBack();

      swapping = false;
    }

    bool takeFee = !swapping;

    // if any account belongs to _isExcludedFromFee account then remove the fee
    if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
      takeFee = false;
    }

    uint256 fees = 0;
    // only take fees on buys/sells, do not take on wallet transfers
    if (takeFee) {
      // on sell
      if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
        fees = amount.mul(sellTotalFees).div(100);
        tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
        tokensForTeam += (fees * sellTeamFee) / sellTotalFees;
        tokensForRevShare += (fees * sellRevShareFee) / sellTotalFees;
      }
        // on buy
      else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
        fees = amount.mul(buyTotalFees).div(100);
        tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
        tokensForTeam += (fees * buyTeamFee) / buyTotalFees;
        tokensForRevShare += (fees * buyRevShareFee) / buyTotalFees;
      }

      if (fees > 0) {
        super._transfer(from, address(this), fees);
      }

      amount -= fees;
    }

    super._transfer(from, to, amount);
  }

  function swapTokensForEth(uint256 tokenAmount) private {
    // generate the uniswap pair path of token -> weth
    address[] memory path = new address[](2);
    path[0] = address(this);
    path[1] = uniswapV2Router.WETH();

    _approve(address(this), address(uniswapV2Router), tokenAmount);

    // make the swap
    uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
      tokenAmount,
      0, // accept any amount of ETH
      path,
      address(this),
      block.timestamp
    );
  }

  function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
    // approve token transfer to cover all possible scenarios
    _approve(address(this), address(uniswapV2Router), tokenAmount);

    // add the liquidity
    uniswapV2Router.addLiquidityETH{value: ethAmount}(
      address(this),
      tokenAmount,
      0, // slippage is unavoidable
      0, // slippage is unavoidable
      owner(),
      block.timestamp
    );
  }

  function swapBack() private {
    uint256 contractBalance = balanceOf(address(this));
    uint256 totalTokensToSwap = tokensForLiquidity +
          tokensForRevShare +
          tokensForTeam;
    bool success;

    if (contractBalance == 0 || totalTokensToSwap == 0) {
      return;
    }

    if (contractBalance > swapTokensAtAmount * 20) {
      contractBalance = swapTokensAtAmount * 20;
    }

    // Halve the amount of liquidity tokens
    uint256 liquidityTokens = (contractBalance * tokensForLiquidity) / totalTokensToSwap / 2;
    uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);

    uint256 initialETHBalance = address(this).balance;

    swapTokensForEth(amountToSwapForETH);

    uint256 ethBalance = address(this).balance.sub(initialETHBalance);

    uint256 ethForRevShare = ethBalance.mul(tokensForRevShare).div(totalTokensToSwap - (tokensForLiquidity / 2));

    uint256 ethForTeam = ethBalance.mul(tokensForTeam).div(totalTokensToSwap - (tokensForLiquidity / 2));

    uint256 ethForLiquidity = ethBalance - ethForRevShare - ethForTeam;

    tokensForLiquidity = 0;
    tokensForRevShare = 0;
    tokensForTeam = 0;

    if (ethForTeam > 0) {
      (success, ) = address(teamWallet).call{value: ethForTeam}("");
    }

    if (liquidityTokens > 0 && ethForLiquidity > 0) {
      addLiquidity(liquidityTokens, ethForLiquidity);
      emit SwapAndLiquify(
        amountToSwapForETH,
        ethForLiquidity,
        tokensForLiquidity
      );
    }

    (success, ) = address(revShareWallet).call{value: address(this).balance}("");
  }

  function withdrawStuckBD() external onlyOwner {
    uint256 balance = IERC20(address(this)).balanceOf(address(this));
    IERC20(address(this)).transfer(msg.sender, balance);
    payable(msg.sender).transfer(address(this).balance);
  }

  function withdrawStuckToken(address _token, address _to) external onlyOwner {
    require(_token != address(0), "_token address cannot be 0");
    uint256 _contractBalance = IERC20(_token).balanceOf(address(this));
    IERC20(_token).transfer(_to, _contractBalance);
  }

  function withdrawStuckEth(address toAddr) external onlyOwner {
    (bool success, ) = toAddr.call{
        value: address(this).balance
      } ("");
    require(success);
  }

  // @dev team renounce blacklist commands
  function renounceBlacklist() public onlyOwner {
    blacklistRenounced = true;
  }

  // @dev blacklist v3 pools; can unblacklist() down the road to suit project and community
  function blacklist(address lpAddress) public onlyOwner {
    require(!blacklistRenounced, "Team has revoked blacklist rights");
    require(
      lpAddress != address(uniswapV2Pair) && lpAddress != address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D),
      "Cannot blacklist token's v2 router or v2 pool."
    );
    blacklisted[lpAddress] = true;
  }

  // @dev unblacklist address; not affected by blacklistRenounced incase team wants to unblacklist v3 pools down the road
  function unblacklist(address _addr) public onlyOwner {
    blacklisted[_addr] = false;
  }

  function setPreMigrationTransferable(address _addr, bool isAuthorized) public onlyOwner {
    preMigrationTransferrable[_addr] = isAuthorized;
    excludeFromFees(_addr, isAuthorized);
    excludeFromMaxTransaction(_addr, isAuthorized);
  }
}