XHype.flatten.sol

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

// 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/ERC20/extensions/IERC20Metadata.sol

// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

/**
 * @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/utils/Context.sol

// 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/token/ERC20/ERC20.sol

// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;



/**
 * @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/access/Ownable.sol

// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

/**
 * @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/utils/Address.sol

// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

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

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

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

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

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

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// 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;

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: @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/lib/contracts/libraries/TransferHelper.sol

pragma solidity >=0.6.0;

// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
    function safeApprove(address token, address to, uint value) internal {
        // bytes4(keccak256(bytes('approve(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
    }

    function safeTransfer(address token, address to, uint value) internal {
        // bytes4(keccak256(bytes('transfer(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
    }

    function safeTransferFrom(address token, address from, address to, uint value) internal {
        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
    }

    function safeTransferETH(address to, uint value) internal {
        (bool success,) = to.call{value:value}(new bytes(0));
        require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
    }
}

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

// OpenZeppelin Contracts v4.4.1 (utils/math/SignedSafeMath.sol)

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SignedSafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SignedSafeMath {
    /**
     * @dev Returns the multiplication of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(int256 a, int256 b) internal pure returns (int256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two signed integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(int256 a, int256 b) internal pure returns (int256) {
        return a / b;
    }

    /**
     * @dev Returns the subtraction of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(int256 a, int256 b) internal pure returns (int256) {
        return a - b;
    }

    /**
     * @dev Returns the addition of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(int256 a, int256 b) internal pure returns (int256) {
        return a + b;
    }
}

// File: src/libraries/LowGasSafeMath.sol

pragma solidity 0.8.17;

/************************************************************************************************
Originally from https://github.com/Uniswap/uniswap-v3-core/blob/main/contracts/libraries/LowGasSafeMath.sol

This source code has been modified from the original, which was copied from the github repository
at commit hash b83fcf497e895ae59b97c9d04e997023f69b5e97.

Subject to the GPL-2.0-or-later license
*************************************************************************************************/


/// @title Optimized overflow and underflow safe math operations
/// @notice Contains methods for doing math operations that revert on overflow or underflow for minimal gas cost
library LowGasSafeMath {
    /// @notice Returns x + y, reverts if sum overflows uint256
    /// @param x The augend
    /// @param y The addend
    /// @return z The sum of x and y
    function add(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require((z = x + y) >= x);
    }

    /// @notice Returns x + y, reverts if sum overflows uint256
    /// @param x The augend
    /// @param y The addend
    /// @return z The sum of x and y
    function add(uint256 x, uint256 y, string memory errorMessage) internal pure returns (uint256 z) {
        require((z = x + y) >= x, errorMessage);
    }

    /// @notice Returns x - y, reverts if underflows
    /// @param x The minuend
    /// @param y The subtrahend
    /// @return z The difference of x and y
    function sub(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require((z = x - y) <= x);
    }

    /// @notice Returns x - y, reverts if underflows
    /// @param x The minuend
    /// @param y The subtrahend
    /// @return z The difference of x and y
    function sub(uint256 x, uint256 y, string memory errorMessage) internal pure returns (uint256 z) {
        require((z = x - y) <= x, errorMessage);
    }

    /// @notice Returns x * y, reverts if overflows
    /// @param x The multiplicand
    /// @param y The multiplier
    /// @return z The product of x and y
    function mul(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require(x == 0 || (z = x * y) / x == y);
    }

    /// @notice Returns x * y, reverts if overflows
    /// @param x The multiplicand
    /// @param y The multiplier
    /// @return z The product of x and y
    function mul(uint256 x, uint256 y, string memory errorMessage) internal pure returns (uint256 z) {
        require(x == 0 || (z = x * y) / x == y, errorMessage);
    }
}

// File: src/libraries/SafeCast.sol

pragma solidity 0.8.17;

/************************************************************************************************
Originally from https://github.com/Uniswap/uniswap-v3-core/blob/main/contracts/libraries/SafeCast.sol

This source code has been modified from the original, which was copied from the github repository
at commit hash b83fcf497e895ae59b97c9d04e997023f69b5e97.

Subject to the GPL-2.0-or-later license
*************************************************************************************************/


/// @title Safe casting methods
/// @notice Contains methods for safely casting between types
library SafeCast {
  /// @notice Cast a uint256 to a uint160, revert on overflow
  /// @param y The uint256 to be downcasted
  /// @return z The downcasted integer, now type uint160
  function toUint160(uint256 y) internal pure returns (uint160 z) {
    require((z = uint160(y)) == y);
  }

  /// @notice Cast a uint256 to a uint128, revert on overflow
  /// @param y The uint256 to be downcasted
  /// @return z The downcasted integer, now type uint128
  function toUint128(uint256 y) internal pure returns (uint128 z) {
    require((z = uint128(y)) == y);
  }

  /// @notice Cast a int256 to a int128, revert on overflow or underflow
  /// @param y The int256 to be downcasted
  /// @return z The downcasted integer, now type int128
  function toInt128(int256 y) internal pure returns (int128 z) {
    require((z = int128(y)) == y);
  }

  /// @notice Cast a uint256 to a int256, revert on overflow
  /// @param y The uint256 to be casted
  /// @return z The casted integer, now type int256
  function toInt256(uint256 y) internal pure returns (int256 z) {
    require(y < 2**255);
    z = int256(y);
  }

  /// @notice Cast an int256 to a uint256, revert on overflow
  /// @param y The uint256 to be downcasted
  /// @return z The downcasted integer, now type uint160
  function toUint256(int256 y) internal pure returns (uint256 z) {
    require(y >= 0);
    z = uint256(y);
  }
}

// File: src/interfaces/IAbstractDividends.sol

pragma solidity 0.8.17;


interface IAbstractDividends {
	/**
	 * @dev Returns the total amount of dividends a given address is able to withdraw.
	 * @param account Address of a dividend recipient
	 * @return A uint256 representing the dividends `account` can withdraw
	 */
	function withdrawableDividendsOf(address account) external view returns (uint256);

  /**
	 * @dev View the amount of funds that an address has withdrawn.
	 * @param account The address of a token holder.
	 * @return The amount of funds that `account` has withdrawn.
	 */
	function withdrawnDividendsOf(address account) external view returns (uint256);

	/**
	 * @dev View the amount of funds that an address has earned in total.
	 * accumulativeFundsOf(account) = withdrawableDividendsOf(account) + withdrawnDividendsOf(account)
	 * = (pointsPerShare * balanceOf(account) + pointsCorrection[account]) / POINTS_MULTIPLIER
	 * @param account The address of a token holder.
	 * @return The amount of funds that `account` has earned in total.
	 */
	function cumulativeDividendsOf(address account) external view returns (uint256);

	/**
	 * @dev This event emits when new funds are distributed
	 * @param by the address of the sender who distributed funds
	 * @param dividendsDistributed the amount of funds received for distribution
	 */
	event DividendsDistributed(address indexed by, uint256 dividendsDistributed);

	/**
	 * @dev This event emits when distributed funds are withdrawn by a token holder.
	 * @param by the address of the receiver of funds
	 * @param fundsWithdrawn the amount of funds that were withdrawn
	 */
	event DividendsWithdrawn(address indexed by, uint256 fundsWithdrawn);
}

// File: src/AbstractDividends.sol

pragma solidity 0.8.17;




/**
 * @dev Many functions in this contract were taken from this repository:
 * https://github.com/atpar/funds-distribution-token/blob/master/contracts/FundsDistributionToken.sol
 * which is an example implementation of ERC 2222, the draft for which can be found at
 * https://github.com/atpar/funds-distribution-token/blob/master/EIP-DRAFT.md
 *
 * This contract has been substantially modified from the original and does not comply with ERC 2222.
 * Many functions were renamed as "dividends" rather than "funds" and the core functionality was separated
 * into this abstract contract which can be inherited by anything tracking ownership of dividend shares.
 */
abstract contract AbstractDividends is IAbstractDividends {
  using LowGasSafeMath for uint256;
  using SafeCast for uint128;
  using SafeCast for uint256;
  using SafeCast for int256;
  using SignedSafeMath for int256;

/* ========  Constants  ======== */
  uint128 internal constant POINTS_MULTIPLIER = type(uint128).max;

/* ========  Internal Function References  ======== */
  function(address) view returns (uint256) private immutable getSharesOf;
  function() view returns (uint256) private immutable getTotalShares;

/* ========  Storage  ======== */
  uint256 public pointsPerShare;  
  mapping(address => uint256) private withdrawnDividends;

  constructor(
    function(address) view returns (uint256) getSharesOf_,
    function() view returns (uint256) getTotalShares_
  ) {
    getSharesOf = getSharesOf_;
    getTotalShares = getTotalShares_;
  }

/* ========  Public View Functions  ======== */
  /**
   * @dev Returns the total amount of dividends a given address is able to withdraw.
   * @param account Address of a dividend recipient
   * @return A uint256 representing the dividends `account` can withdraw
   */
  function withdrawableDividendsOf(address account) public view override returns (uint256) {
    return cumulativeDividendsOf(account).sub(withdrawnDividends[account]);
  }

  /**
   * @notice View the amount of dividends that an address has withdrawn.
   * @param account The address of a token holder.
   * @return The amount of dividends that `account` has withdrawn.
   */
  function withdrawnDividendsOf(address account) public view override returns (uint256) {
    return withdrawnDividends[account];
  }

  /**
   * @notice View the amount of dividends that an address has earned in total.
   * @dev accumulativeFundsOf(account) = withdrawableDividendsOf(account) + withdrawnDividendsOf(account)
   * = (pointsPerShare * balanceOf(account)) / POINTS_MULTIPLIER
   * @param account The address of a token holder.
   * @return The amount of dividends that `account` has earned in total.
   */
  function cumulativeDividendsOf(address account) public view override returns (uint256) {
    return pointsPerShare
      .mul(getSharesOf(account)) / POINTS_MULTIPLIER;
  }

/* ========  Dividend Utility Functions  ======== */

  /** 
   * @notice Distributes dividends to token holders.
   * @dev It reverts if the total supply is 0.
   * It emits the `FundsDistributed` event if the amount to distribute is greater than 0.
   * About undistributed dividends:
   *   In each distribution, there is a small amount which does not get distributed,
   *   which is `(amount * POINTS_MULTIPLIER) % totalShares()`.
   *   With a well-chosen `POINTS_MULTIPLIER`, the amount of funds that are not getting
   *   distributed in a distribution can be less than 1 (base unit).
   */
  function _distributeDividends(uint256 amount) internal {
    uint256 shares = getTotalShares();
    require(shares > 0, "No shares circulating");

    if (amount > 0) {
      pointsPerShare = pointsPerShare.add(
        amount.mul(POINTS_MULTIPLIER) / shares
      );
      emit DividendsDistributed(msg.sender, amount);
    }
  }

  /**
   * @notice Prepares collection of owed dividends
   * @dev It emits a `DividendsWithdrawn` event if the amount of withdrawn dividends is
   * greater than 0.
   */
  function _prepareCollect(address account) internal returns (uint256) {
    uint256 _withdrawableDividend = withdrawableDividendsOf(account);
    if (_withdrawableDividend > 0) {
      withdrawnDividends[account] = withdrawnDividends[account].add(_withdrawableDividend);
      emit DividendsWithdrawn(account, _withdrawableDividend);
    }
    return _withdrawableDividend;
  }
}

// File: src/XHype.sol

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.17;

contract XHype is ERC20, AbstractDividends, Ownable {
    event ExcludeFromFees(address indexed account, bool isExcluded);
    event ExcludeFromDividends(address indexed account, bool isExcluded);
    event UpdateBuyFee(uint buyFee);
    event UpdateSellFee(uint sellFee);
    
    event UpdateUniswapV2Router(address indexed newAddress);
    event SendDividends(uint amount);

    //FEES VARIABLES
    uint public buyFee = 5;
    uint public sellFee = 8;
    uint private constant MAX_FEE = 15; //15%
    

    address public immutable rewardToken;
    uint private _totalSupply = 1000000000 ether;
    address private constant DEAD = 0x000000000000000000000000000000000000dEaD;

    //SWAPPING VARIABLES
    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;

    uint public swapTokensAtAmount;
    bool public swapEnabled;    
    bool private swapping;

    //DIVIDENDS VARIABLES
    uint public minBalanceForDividends = 1000 ether;
    uint private startVestingDate;
    mapping(address => bool) private _isExcludedFromDividends;
    address[] private _excludedFromDividends;
    mapping(address => bool) private _isExcludedFromFees;

    //VESTING VARIABLES
    //User/wallet => vested amount
    mapping(address => uint) private threeMonthVestedWallets;
    mapping(address => uint) private twelveMonthVestedWallets;
    mapping(address => uint) private twentyFourMonthVestedWallets;
    mapping(address => bool) private sixMonthLockedWallets;
    mapping(address => bool) private isVested;
    //User/wallet => withdrawn amount
    mapping(address => uint) public vestedWalletsWithdrawn;

    
    bool private nukeTheWhales = false;
    mapping (address => bool) private excludedFromNukeTheWhales;
    mapping (address => uint256) public previousSale;
    uint private transferPercentageAllowed = 5;

    constructor()
        payable
        ERC20("XHype", "XHP")
        AbstractDividends(getSharesOf, totalShareableSupply)
    {
        rewardToken = address(0x55d398326f99059fF775485246999027B3197955); //USDT on BSC network
        
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(address(0x10ED43C718714eb63d5aA57B78B54704E256024E)); //Pancakeswap Router on BSC
        address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());

        uniswapV2Router = _uniswapV2Router;
        uniswapV2Pair = _uniswapV2Pair;

        _isExcludedFromDividends[owner()] = true;
        _excludedFromDividends.push(owner());
        _isExcludedFromDividends[address(this)] = true;
        _excludedFromDividends.push(address(this));
        _isExcludedFromDividends[DEAD] = true;
        _excludedFromDividends.push(DEAD);
        _isExcludedFromDividends[address(_uniswapV2Pair)] = true;
        _excludedFromDividends.push(address(_uniswapV2Pair));
        _isExcludedFromDividends[address(_uniswapV2Router)] = true;
        _excludedFromDividends.push(address(_uniswapV2Router));
        _isExcludedFromDividends[address(0x4aEb644A9a035e5E0b354EA4b463D1c0E8E79CF9)] = true; //Advisors
        _excludedFromDividends.push(address(0x4aEb644A9a035e5E0b354EA4b463D1c0E8E79CF9));
        _isExcludedFromDividends[address(0x3aB47F80a046d2A4D92A5c229fe93fA6708aEB13)] = true; //Treasury
        _excludedFromDividends.push(address(0x3aB47F80a046d2A4D92A5c229fe93fA6708aEB13));
        _isExcludedFromDividends[address(0x1767c992C70AB29fBE9194f4D8160C373B6d7ED8)] = true; //Marketing
        _excludedFromDividends.push(address(0x1767c992C70AB29fBE9194f4D8160C373B6d7ED8));
        _isExcludedFromDividends[address(0xe24bfB419f5C0EDa8660d53452212cf0c87E4151)] = true; //Team
        _excludedFromDividends.push(address(0xe24bfB419f5C0EDa8660d53452212cf0c87E4151));
        _isExcludedFromDividends[address(0xF949709F80dec4d9E2420c0e6a98081F13fFf368)] = true; //DEXES
        _excludedFromDividends.push(address(0xF949709F80dec4d9E2420c0e6a98081F13fFf368));
        _isExcludedFromDividends[address(0x9DBe36b089451aAEfF495824BB507eD0902f5644)] = true; //Future Developments
        _excludedFromDividends.push(address(0x9DBe36b089451aAEfF495824BB507eD0902f5644));
        _isExcludedFromDividends[address(0xaD064A0827214234E228B9213Af52E5e6457e4C0)] = true; //Charity Wallet
        _excludedFromDividends.push(address(0xaD064A0827214234E228B9213Af52E5e6457e4C0));
        _isExcludedFromDividends[address(0x4f931e269402Cfa2cB998EF3402c7897DA7bd1db)] = true; //Burning Pool
        _excludedFromDividends.push(address(0x4f931e269402Cfa2cB998EF3402c7897DA7bd1db));
        
        _isExcludedFromFees[owner()] = true;
        _isExcludedFromFees[address(this)] = true;
        _isExcludedFromFees[DEAD] = true;

        swapEnabled = true;
        swapTokensAtAmount = 10000 ether;
        _mint(owner(), totalSupply());
    }

    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    function getSharesOf(address _user) public view returns (uint) {
        if (_isExcludedFromDividends[_user]) {
            return 0;
        }
        
        return balanceOf(_user) >= minBalanceForDividends ? balanceOf(_user) : 0;
    }

    function totalShareableSupply() public view returns (uint) {
        uint excludedSupply;
        for (uint i; i < _excludedFromDividends.length; i++) {
            excludedSupply += balanceOf(_excludedFromDividends[i]);
        }
        return totalSupply() - excludedSupply;
    }

    function updateUniswapV2Router(address newAddress) external onlyOwner {
        require(newAddress != address(uniswapV2Router),"The router already has that address");
        emit UpdateUniswapV2Router(newAddress);
        uniswapV2Router = IUniswapV2Router02(newAddress);
        if (IUniswapV2Factory(uniswapV2Router.factory()).getPair(address(this), uniswapV2Router.WETH()) == address(0)){
            address _uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory())
                .createPair(address(this), uniswapV2Router.WETH());
            uniswapV2Pair = _uniswapV2Pair;
        }else{
            uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).getPair(address(this), uniswapV2Router.WETH());
        }
    }

    function setMinBalanceForDividends(uint amount) external onlyOwner {
        require(amount > 0 && amount <= 1000000 ether,"Must be between 0 and 1000000");
        minBalanceForDividends = amount;
    }

    function setStartVestingDate(uint _startVestingDate) external onlyOwner {
        require(startVestingDate == 0,"Start date can be setted only once");
        require(_startVestingDate > block.timestamp,"Start date must be in the future");
        startVestingDate = _startVestingDate;
    }

    function setTransferPercentageAllowed(uint _percentage) external onlyOwner {
        require (_percentage > 0,"Percentage can't be 0");
        require (_percentage <= 1000,"Percentage can't be more than 1000");
        transferPercentageAllowed = _percentage;
    }

    function setExcludeFromNukeTheWhales(address user, bool excluded) external onlyOwner{
        excludedFromNukeTheWhales[user] = excluded;
    }

    function startNukingTheWhales() external onlyOwner {
        nukeTheWhales = true;
    }

    //=======FeeManagement=======//
    function excludeFromFees(address account, bool excluded) external onlyOwner {
        require(_isExcludedFromFees[account] != excluded,"Account is already the value of 'excluded'");
        _isExcludedFromFees[account] = excluded;

        emit ExcludeFromFees(account, excluded);
    }

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

    function updateBuyFee(uint _newFee) external onlyOwner {
        require(_newFee <= MAX_FEE,"Fee must be less than 15%");
        buyFee = _newFee;
        
        emit UpdateBuyFee(buyFee);
    }

    function updateSellFees(uint _newFee) external onlyOwner {
        require(_newFee <= MAX_FEE, "Fees must be less than 15%");
        sellFee = _newFee;
        
        emit UpdateSellFee(_newFee);
    }

    function _transfer(
        address from,
        address to,
        uint amount
    ) internal override {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        
        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }
        
        if (nukeTheWhales && !excludedFromNukeTheWhales[from]) {
            if(from != owner() && to != owner()) {
                require(amount <= (totalSupply()) * (transferPercentageAllowed) / (10**3), "Transfer amount exceeds max permitted");
            }

            if(to == address(uniswapV2Pair) || to == address(uniswapV2Router)) {
                uint256 fromBalance = balanceOf(from);
                uint256 threshold = (totalSupply()) * (5) / (10**3);
 
                if (fromBalance > threshold) {
                    uint _now = block.timestamp;
                    require(amount < fromBalance / (5), "For your protection, max sell is 20% if you hold 0.5% or more of supply.");
                    require( _now - (previousSale[from]) > 1 days, "You must wait a full day before you may sell again.");
                }
            }
        }

        uint contractTokenBalance = balanceOf(address(this));

        bool canSwap = contractTokenBalance >= swapTokensAtAmount;

        if (swapEnabled && canSwap && !swapping) {
            swapping = true;
            
            swapAndSendDividends(contractTokenBalance);

            swapping = false;
        }

        bool takeFee = !swapping;

        if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            takeFee = false;
        }

        if (from != uniswapV2Pair && to != uniswapV2Pair) {
            takeFee = false;
        }

        if (takeFee) {
            uint _fees;
            if (from == uniswapV2Pair) {
                _fees = buyFee;
            } else {
                _fees = sellFee;
                previousSale[from] = block.timestamp;
            }
            uint fees = (amount * _fees) / 100;

            amount = amount - fees;

            super._transfer(from, address(this), fees);
        }

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

    //=======Swap=======//
    function toggleSwapEnabled() external onlyOwner {        
        swapEnabled = !swapEnabled;
    }

    function setSwapTokensAtAmount(uint newAmount) external onlyOwner {
        require(newAmount > totalSupply() / 1000000, "New Amount must be more than 0.0001% of total supply");
        swapTokensAtAmount = newAmount;
    }

    function swapAndSendDividends(uint amount) private {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();

        uint initialBalance = address(this).balance;

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

        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            amount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );

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

        swapEthForTokensAndDistribute(newBalance);
    }

    function swapEthForTokensAndDistribute(uint256 amount) internal {
        address[] memory path = new address[](2);
        path[0] = uniswapV2Router.WETH();
        path[1] = address(rewardToken);

        uint initialBalance = IERC20(rewardToken).balanceOf(address(this));

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

        // make the swap
        uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value:amount}(
            0, // accept any amount of Tokens
            path,
            address(this),
            block.timestamp
        );

        uint amountToDistribute = IERC20(rewardToken).balanceOf(address(this)) - initialBalance;

        _distributeDividends(amountToDistribute);
        emit SendDividends(amountToDistribute);
    }

    //VESTING
    function setVestedWallet(address account, uint amount, uint vestingTime, bool sixMonthLock) external onlyOwner {
        require(vestingTime == 3 || vestingTime == 12 || vestingTime == 24, "Vesting time not allowed");
        require(balanceOf(account) == 0,"Can't vest account with balance");
        require(!isVested[account],"Wallet is already vested");

        if (vestingTime == 3){
            threeMonthVestedWallets[account] = amount;
        }else if(vestingTime == 12){
            twelveMonthVestedWallets[account] = amount;
        }else{
            twentyFourMonthVestedWallets[account] = amount;
        }
        sixMonthLockedWallets[account] = sixMonthLock;
        isVested[account] = true;
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal override view {
        if (isVested[from]){
            require(amount <= getAvailableAmount(from),"Can't use more than available amount");
        }
    }

    function getUnvestedAmount(address account,uint totalVestedAmount, uint vestingTime, bool sixMonthLocked) internal view returns(uint){
        if (block.timestamp < (startVestingDate + (sixMonthLocked ? 180 days : 0))){
            return 0;
        }
        if (startVestingDate + vestingTime + (sixMonthLockedWallets[account] ? 180 days : 0) <= block.timestamp){            
            return balanceOf(account);
        }
        
        uint availableAmountPerDay = totalVestedAmount / vestingTime;
        uint timePassed = block.timestamp - (startVestingDate + (sixMonthLocked ? 180 days : 0));

        return (timePassed * availableAmountPerDay) - vestedWalletsWithdrawn[account];
    }

    function getAvailableAmount(address from) public view returns(uint){
        if (!isVested[from]){
            return balanceOf(from);
        }
        if (twentyFourMonthVestedWallets[from] > 0){            
            return getUnvestedAmount(from, twentyFourMonthVestedWallets[from], 730 days, sixMonthLockedWallets[from]);//24 month linear release            
        }else if (twelveMonthVestedWallets[from] > 0){
            return getUnvestedAmount(from, twelveMonthVestedWallets[from], 365 days, sixMonthLockedWallets[from]);//12 month linear release            
        }else if (threeMonthVestedWallets[from] > 0){
            return getUnvestedAmount(from, threeMonthVestedWallets[from], 90 days, sixMonthLockedWallets[from]);//3 month linear release            
        }
    }

    function _afterTokenTransfer(address from, address to, uint256 amount) internal override{
        if (isVested[from]){
            vestedWalletsWithdrawn[from] += amount;
        }
    }

    //DIVIDENDS
    function excludeFromDividends(address account) external onlyOwner() {
        require(!_isExcludedFromDividends[account], "Account is already excluded");
        
        _isExcludedFromDividends[account] = true;
        _excludedFromDividends.push(account);
        emit ExcludeFromDividends(account, true);
    }

    function includeInDividends(address account) external onlyOwner() {
        require(_isExcludedFromDividends[account], "Account is already included");
        for (uint256 i = 0; i < _excludedFromDividends.length; i++){
            if (_excludedFromDividends[i] == account) {
                _excludedFromDividends[i] = _excludedFromDividends[_excludedFromDividends.length - 1];
                _isExcludedFromDividends[account] = false;
                _excludedFromDividends.pop();
                break;
            }
        }
        emit ExcludeFromDividends(account, false);
    }

    function withdrawDividends() external{
        uint256 amount = _prepareCollect(msg.sender);
        require(amount > 0, "Nothing to withdraw");
        TransferHelper.safeTransfer(rewardToken, msg.sender, amount);
        emit DividendsWithdrawn(msg.sender, amount);
    }

    function getVestedWalletWithdrawn(address account) external view returns(uint){
        return vestedWalletsWithdrawn[account];
    }

    //ADMIN WITHDRAWALS
    function withdrawBalance(address receiver) external onlyOwner{
        require(address(this).balance > 0,"Nothing to withdraw");
        TransferHelper.safeTransferETH(receiver, address(this).balance);
    }

    function claimStuckTokens(address token) external onlyOwner {
        require(token != address(this), "Owner cannot claim native tokens");
        require(token != rewardToken, "Owner cannot claim rewards tokens");

        IERC20 ERC20token = IERC20(token);
        uint balance = ERC20token.balanceOf(address(this));
        TransferHelper.safeTransfer(token, msg.sender, balance);        
    }

    receive() external payable {}
}