// File: @openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.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 AddressUpgradeable {
    /**
     * @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 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: @openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol


// OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;


/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

// File: @openzeppelin/contracts/utils/Counters.sol


// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)

pragma solidity ^0.8.0;

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

// 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/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: contracts/ver.sol


/**
* @title whoopdoopRaffle
* @author Captain Unknown
*/
pragma solidity ^0.8.19.0;




interface IERC20{
    function decimals() external view returns (uint8);
    function totalSupply() external view returns (uint256);
    function balanceOf(address _owner) external view returns (uint256 balance);
    function transfer(address _to, uint256 _value) external returns (bool success);
    function transferFrom(address _from, address _to, uint256 _value) external returns (bool success);
    function approve(address _spender, uint256 _value) external returns (bool success);
    function allowance(address _owner, address _spender) external view returns (uint256 remaining);
}

interface IERC721 {
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    function approve(address to, uint256 tokenId) external;
    function setApprovalForAll(address operator, bool approved) external;
    function ownerOf(uint256 tokenId) external view returns (address owner);
    function balanceOf(address owner) external view returns (uint256 balance);
    function transferFrom(address from, address to, uint256 tokenId) external;
    function safeTransferFrom(address from, address to, uint256 tokenId) external;
    function getApproved(uint256 tokenId) external view returns (address operator);
    function isApprovedForAll(address owner, address operator) external view returns (bool);
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}

contract WhoopDoopRaffle is Ownable, Initializable {
    using Counters for Counters.Counter;
    Counters.Counter public currentRaffleId;

    struct Prize {
        address NFTContract;
        uint256 NFTTokenId;
    }

    struct Raffle {
        uint256 raffleId;
        uint256 ethPrice;
        uint256 doopPrice;
        bool payableWithDoop;
        bool hasEnded;
        uint256 endTime;
        address[] participants;
        address winner;
        Prize rafflePrize;
    }

    // Context
    address public EAPass;
    address public WDCollection;
    address public doopToken;
    uint256 public maxTicketCount;

    mapping (address => bool) private admin;
    mapping (uint256 => Raffle) public OnGoingRaffles;

    event RaffleStarted(uint256 indexed raffleId, uint256 price, uint256 endTime, Prize rafflePrize);
    event Winner(uint256 indexed raffleId, address winner);

    constructor(address _EAPass, address _WDCollection, address _doopToken, uint256 _maxTicketCount) {
        EAPass = _EAPass;
        WDCollection = _WDCollection;
        doopToken = _doopToken; 
        maxTicketCount = _maxTicketCount;
        _disableInitializers();
    }

    function startRaffle(uint256 _priceInEth, uint256 _doopPrice, bool _payableWithDoop, uint256 _duration, address _prizeNFTContract, uint256 _prizeNFTTokenId) public {
        require(admin[msg.sender], "Only admins can invoke this function.");
        uint256 _endTime = block.timestamp + _duration;

        Raffle memory newRaffle = Raffle(currentRaffleId.current(), _priceInEth, _doopPrice, _payableWithDoop, false, _endTime,
            new address[](0), address(0), Prize(_prizeNFTContract, _prizeNFTTokenId));
        OnGoingRaffles[currentRaffleId.current()] = newRaffle;

        currentRaffleId.increment();
        IERC721(_prizeNFTContract).transferFrom(msg.sender, address(this), _prizeNFTTokenId);
        emit RaffleStarted(newRaffle.raffleId, newRaffle.ethPrice, newRaffle.endTime, newRaffle.rafflePrize);
    }

    function buyTicket(uint256 _RaffleId, uint256 ticketCount) public payable {
        require(raffleExists(_RaffleId), "Invalid Raffle Id.");
        require(block.timestamp < OnGoingRaffles[_RaffleId].endTime, "Raffle entry time is over.");
        require(!(OnGoingRaffles[_RaffleId].hasEnded), "Raffle has already ended.");
        require(ticketCount > 0, "Requested number of tickets should be greater than 0.");
        require(!admin[msg.sender], "Admins can't participate in the raffle.");
        require(msg.sender != owner(), "Owner can't participate in the raffle.");
        require(ticketCount <= maxTicketCount, "Cant buy this much tickets in one go.");

        if (OnGoingRaffles[_RaffleId].payableWithDoop) {
            require(IERC20(doopToken).balanceOf(msg.sender) >= OnGoingRaffles[_RaffleId].doopPrice * ticketCount, "Not enough DOOP balance.");
            require(IERC20(doopToken).transferFrom(msg.sender, address(this), OnGoingRaffles[_RaffleId].doopPrice * ticketCount), "Doop Transfer Failed.");
        } else {
            require(OnGoingRaffles[_RaffleId].ethPrice * ticketCount == msg.value, "Invalid value sent.");
        }

        registerPurchase(_RaffleId, ticketCount);
    }

    function registerPurchase(uint256 _RaffleId, uint256 ticketCount) private {
        if (isHolderOf(msg.sender, EAPass)) {
            ticketCount *= 5;
        } else if (isHolderOf(msg.sender, WDCollection)) {
            ticketCount *= 3;
        } else {
            ticketCount *= 1;
        }

        for (uint256 i = 0; i < ticketCount; i++) {
            OnGoingRaffles[_RaffleId].participants.push(msg.sender);
        }
    }

    function pickWinner(uint256 _RaffleId, string memory seed) private {
        uint256 randomIndex = uint256(keccak256(abi.encodePacked(
                block.timestamp,
                seed,
                blockhash(block.number - 1)
            ))) % OnGoingRaffles[_RaffleId].participants.length;
        address winner = OnGoingRaffles[_RaffleId].participants[randomIndex];
        OnGoingRaffles[_RaffleId].winner = winner;

        IERC721(OnGoingRaffles[_RaffleId].rafflePrize.NFTContract).safeTransferFrom(address(this), winner, OnGoingRaffles[_RaffleId].rafflePrize.NFTTokenId);
        emit Winner(_RaffleId, winner);
    }

    function endRaffle(uint256 _RaffleId, string memory seed) public {
        require(msg.sender == owner() || admin[msg.sender], "Either the owner or an admin can end the raffle.");
        require(raffleExists(_RaffleId), "Invalid Raffle Id.");
        require(block.timestamp >= OnGoingRaffles[_RaffleId].endTime, "Raffle has not ended yet.");
        require(!(OnGoingRaffles[_RaffleId].hasEnded), "Raffle has already ended.");

        OnGoingRaffles[_RaffleId].hasEnded = true;

        if (OnGoingRaffles[_RaffleId].participants.length == 0) {
            IERC721(OnGoingRaffles[_RaffleId].rafflePrize.NFTContract).safeTransferFrom(address(this), owner(), OnGoingRaffles[_RaffleId].rafflePrize.NFTTokenId);
        } else {
            pickWinner(_RaffleId, seed);
        }
    }
    
    function cancelRaffle(uint256 _RaffleId) public {
        require(raffleExists(_RaffleId), "Invalid Raffle Id.");
        require(msg.sender == owner() || admin[msg.sender], "Either the owner or an admin can cancel the raffle.");
        OnGoingRaffles[_RaffleId].hasEnded = true;
        IERC721(OnGoingRaffles[_RaffleId].rafflePrize.NFTContract).safeTransferFrom(address(this), owner(), OnGoingRaffles[_RaffleId].rafflePrize.NFTTokenId);
    }

    // Utilities
    function raffleExists(uint256 _RaffleId) public view returns (bool) {
        return _RaffleId < currentRaffleId.current();
    }

    function getTotalParticipants(uint256 _RaffleId) public view returns (uint256) {
        require(raffleExists(_RaffleId), "Invalid Raffle Id.");
        return OnGoingRaffles[_RaffleId].participants.length;
    }

    function getOngoingRaffles() public view returns (uint256[] memory) {
        uint256[] memory raffleIds = new uint256[](currentRaffleId.current());
        uint256 count = 0;
        for (uint256 i = 0; i < currentRaffleId.current(); i++) {
            if (!OnGoingRaffles[i].hasEnded) {
                raffleIds[count] = i;
                count++;
            }
        }
        uint256[] memory result = new uint256[](count);
        for (uint256 i = 0; i < count; i++) {
            result[i] = raffleIds[i];
        }
        return result;
    }

    function getEndedRaffles() public view returns (uint256[] memory) {
        uint256[] memory raffleIds = new uint256[](currentRaffleId.current());
        uint256 count = 0;
        for (uint256 i = 0; i < currentRaffleId.current(); i++) {
            if (OnGoingRaffles[i].hasEnded) {
                raffleIds[count] = i;
                count++;
            }
        }
        uint256[] memory result = new uint256[](count);
        for (uint256 i = 0; i < count; i++) {
            result[i] = raffleIds[i];
        }
        return result;
    }

    function isHolderOf(address user, address NFT) private view returns(bool) {
        return IERC721(NFT).balanceOf(user) > 0;
    }

    function withdrawAll() public payable onlyOwner {
        require(address(this).balance > 0 || IERC20(doopToken).balanceOf(address(this)) > 0, "Balance is 0.");
        IERC20(doopToken).transfer(msg.sender, IERC20(doopToken).balanceOf(address(this)));
        payable(msg.sender).transfer(address(this).balance);
    }

    function withdrawEth(uint256 amount) public payable onlyOwner {
        require(address(this).balance >= amount, "Insufficient balance in the contract.");
        payable(msg.sender).transfer(amount);
    }

    function withdrawDoop(uint256 amount) public payable onlyOwner {
        require(IERC20(doopToken).balanceOf(address(this)) >= amount, "Insufficient balance in the contract.");
        IERC20(doopToken).transfer(msg.sender, amount);
    }

    function addAdmin(address _admin) public onlyOwner {
        admin[_admin] = true;
    }

    function removeAdmin(address _admin) public onlyOwner {
        admin[_admin] = false;
    }
}