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0x3EfA12df0fF40e084F90BD7d2645eb9107F8aee5
 

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Set Approval For...240784872025-12-23 23:06:5981 days ago1766531219IN
0x3EfA12df...107F8aee5
0 ETH0.000001320.05453453
Set Approval For...240710762025-12-22 22:16:1182 days ago1766441771IN
0x3EfA12df...107F8aee5
0 ETH0.000004610.1
Set Approval For...240707592025-12-22 21:12:4782 days ago1766437967IN
0x3EfA12df...107F8aee5
0 ETH0.000014650.31744772
Set Approval For...239745252025-12-09 10:08:2395 days ago1765274903IN
0x3EfA12df...107F8aee5
0 ETH0.000018310.75477982
Approve238068212025-11-15 19:57:59119 days ago1763236679IN
0x3EfA12df...107F8aee5
0 ETH0.000003190.06256629
Approve237995432025-11-14 19:33:35120 days ago1763148815IN
0x3EfA12df...107F8aee5
0 ETH0.000099371.94713521
Set Approval For...237178802025-11-03 9:23:35131 days ago1762161815IN
0x3EfA12df...107F8aee5
0 ETH0.000056792.34093632
Set Approval For...234121192025-09-21 14:48:35174 days ago1758466115IN
0x3EfA12df...107F8aee5
0 ETH0.000020570.8479208
Set Approval For...231432672025-08-15 1:50:59212 days ago1755222659IN
0x3EfA12df...107F8aee5
0 ETH0.000022570.48893562
Set Approval For...219001372025-02-22 6:38:47386 days ago1740206327IN
0x3EfA12df...107F8aee5
0 ETH0.00002791.1500128
Set Approval For...218529802025-02-15 16:21:23392 days ago1739636483IN
0x3EfA12df...107F8aee5
0 ETH0.000029111.2
Transfer215196302024-12-31 3:00:23439 days ago1735614023IN
0x3EfA12df...107F8aee5
0 ETH0.000096044.4
Transfer215196302024-12-31 3:00:23439 days ago1735614023IN
0x3EfA12df...107F8aee5
0 ETH0.000096044.4
Transfer215196302024-12-31 3:00:23439 days ago1735614023IN
0x3EfA12df...107F8aee5
0 ETH0.000096044.4
Set Approval For...215193742024-12-31 2:08:59439 days ago1735610939IN
0x3EfA12df...107F8aee5
0 ETH0.000226574.90558212
Set Approval For...215087902024-12-29 14:41:35440 days ago1735483295IN
0x3EfA12df...107F8aee5
0 ETH0.000226414.90219365
Set Approval For...213080042024-12-01 13:37:35468 days ago1733060255IN
0x3EfA12df...107F8aee5
0 ETH0.0006897114.93705322
Set Approval For...211557712024-11-10 7:28:23490 days ago1731223703IN
0x3EfA12df...107F8aee5
0 ETH0.000559712.12137388
Set Approval For...211417232024-11-08 8:27:35492 days ago1731054455IN
0x3EfA12df...107F8aee5
0 ETH0.000455459.84580733
Set Approval For...211347062024-11-07 8:53:23492 days ago1730969603IN
0x3EfA12df...107F8aee5
0 ETH0.000230159.48574914
Set Approval For...211145522024-11-04 13:22:11495 days ago1730726531IN
0x3EfA12df...107F8aee5
0 ETH0.00028826.24151024
Set Approval For...211116712024-11-04 3:43:59496 days ago1730691839IN
0x3EfA12df...107F8aee5
0 ETH0.000090273.72080432
Set Approval For...211075132024-11-03 13:48:23496 days ago1730641703IN
0x3EfA12df...107F8aee5
0 ETH0.000442089.57403489
Set Approval For...211026682024-11-02 21:34:11497 days ago1730583251IN
0x3EfA12df...107F8aee5
0 ETH0.000199384.31803994
Set Approval For...210993562024-11-02 10:27:23497 days ago1730543243IN
0x3EfA12df...107F8aee5
0 ETH0.000189514.10437151
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Transfer210722422024-10-29 15:39:23501 days ago1730216363
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Transfer210722412024-10-29 15:39:11501 days ago1730216351
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Contract Source Code Verified (Exact Match)

Contract Name:
FacesOfWeb

Compiler Version
v0.8.17+commit.8df45f5f

Optimization Enabled:
Yes with 200 runs

Other Settings:
london EvmVersion
File 1 of 36 : FacesOfWeb.sol
// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//                OW###F***////                                                                                             //
//             O#&&###WFFF**//////////////////                                                                              //
//           /@@@##WWWWFF/O@%##WWOOFFFFFF///****FFFF*///                                                                    //
//          F@%##WWW#WFF/O@@@@@@@@@@@&&####WOOOFFFFFFFFFFOO                                                                 //
//         *O#&####WW#W*F/F@&%%#%#%#%%&&@&@@@@@@@@@@@##WOOOO/                                                               //
//      F#%@@@####W#W#WFF*F@@@%%#%#######&&@@@O/   O@@@@@&FF/                                                               //
//    W%@@@@%#######W##WFFF/ W@@@@%&#%#&&@@@#*  F##O  /%@@#OF/                                                              //
//  O@@@#%############WFFFOW  F%@@@@@@@@@W  F&#O  *#&O /&@OF        O  @@@@@@@@@O                                           //
//  O@&###############WFFF//&#*   FFFF*   #&O  O##O  F&O  OWW///*O#F   @@@#OWWW#    /FOW         FOW      *FF*      FOOOOO  //
//  O@##############W#OFFFO#  W@%O*   F#@&/ F@#F  *#&O F&W     /    %* @@@FFFOOO F@@@@@@@@@# /@@@@@@@@FF@@@@@@@@W @@@@@@@@  //
//  #@%#######%#######WFFF/ %&F  /OW#WO   #&O  *FFF  F&O F@@#OFFO#@&*  @@@@@@@@@&@@@#FFO#@@@#@@@&FFO&#@@@@FFW@@@@@@@@WF*F   //
//  #@#######%######W#WFFFOO  W@&W*  /F#@%  /#@@@@@@%* F&W  /OOWO   #/ @@@*     @@@F     @@@@@@%      @@@@@@@@#OF/*%@@@@@@  //
//  #@%#######%#######WFF*O@@W   *O##WO   F&@@&%%#%%@@&* F@&WF  FW@@F  @@@F     O@@@@##&@@@@O@@@@##%@@%@@@@@WW@#  &WFF#@@@O //
//  #@################OFF*O@@@@@O*     F#@@@%%#%###%#&&@%*  *W#%WO  O  @@@F       O&@@@@@@@@/ O@@@@@@@F %@@@@@@@ F@@@@@@@O  //
//  @@%#######%#######WFF*O@&&@@@@@@@@@@@&&%%#%#%%%#%#%&@@&OF    *##O        O&@@ /WWW    ##%*   W##*          #&#          //
//  @@%%##############OFFFW@@@@@@@@@@@@@@@@@@@&@&@&@&&&@@@WOW#%&##*  F#@@#  #@@@@ W@@@   F@@@W   @@@W         /@@@          //
//  W#@@&%%#%#%#######OFFFOWWOOOOOOOOOOFFFFFFFFFFFFFFFFFFFFFF       @@@OW@@FW@@O# *@@@O  #@@@&  F@@@/*@@@@@@&/ @@@@@@@@@W   //
//    #@@@@@@@&&%%###&OFFFF**********************FFF*FFFFFFOO       @@@F*@@WF@@    @@@@  @@@@@  @@@@@@@@OW@@@@@@@@@@&@@@@@O //
//       /FO##&@@@&%%%O*FFFFFFFFFFFFFFFFFFOOOOOOOOWOWWWW#W           O@@@@O O@@     @@@F#@@@@@&F@@@#@@@O@@@@@#O@@@     O@@@ //
//              /*FOO####%FOFFFFFFFFFFFFFFFF***////////                             /@@@@@@ @@@@@@//@@@@@WF#W  @@@&WFO#@@@# //
//           #@##WWW##&&@&W###%#&%&&&%@@@@@%%##WWOO                                   &@@#   W@@@    %@@@@@@@O O@@@@@@@@@*  //
//                  /FOW#&@&OOOOOOFFF*//                                                                                    //
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

import "@thirdweb-dev/contracts/base/ERC721Drop.sol";

contract FacesOfWeb is ERC721Drop {
    constructor(
        address _defaultAdmin,
        string memory _name,
        string memory _symbol,
        address _royaltyRecipient,
        uint128 _royaltyBps,
        address _primarySaleRecipient
    )
        ERC721Drop(
            _defaultAdmin,
            _name,
            _symbol,
            _royaltyRecipient,
            _royaltyBps,
            _primarySaleRecipient
        )
    {}
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import { ERC721A, Context } from "../eip/ERC721AVirtualApprove.sol";

import "../extension/ContractMetadata.sol";
import "../extension/Multicall.sol";
import "../extension/Ownable.sol";
import "../extension/Royalty.sol";
import "../extension/BatchMintMetadata.sol";
import "../extension/PrimarySale.sol";
import "../extension/DropSinglePhase.sol";
import "../extension/LazyMint.sol";
import "../extension/DelayedReveal.sol";

import "../lib/Strings.sol";
import { CurrencyTransferLib } from "../lib/CurrencyTransferLib.sol";

/**
 *      BASE:      ERC721A
 *      EXTENSION: DropSinglePhase
 *
 *  The `ERC721Drop` contract implements the ERC721 NFT standard, along with the ERC721A optimization to the standard.
 *  It includes the following additions to standard ERC721 logic:
 *
 *      - Contract metadata for royalty support on platforms such as OpenSea that use
 *        off-chain information to distribute roaylties.
 *
 *      - Ownership of the contract, with the ability to restrict certain functions to
 *        only be called by the contract's owner.
 *
 *      - Multicall capability to perform multiple actions atomically
 *
 *      - EIP 2981 compliance for royalty support on NFT marketplaces.
 *
 *  The `drop` mechanism in the `DropSinglePhase` extension is a distribution mechanism for lazy minted tokens. It lets
 *  you set restrictions such as a price to charge, an allowlist etc. when an address atttempts to mint lazy minted tokens.
 *
 *  The `ERC721Drop` contract lets you lazy mint tokens, and distribute those lazy minted tokens via the drop mechanism.
 */

contract ERC721Drop is
    ERC721A,
    ContractMetadata,
    Multicall,
    Ownable,
    Royalty,
    BatchMintMetadata,
    PrimarySale,
    LazyMint,
    DelayedReveal,
    DropSinglePhase
{
    using Strings for uint256;

    /*///////////////////////////////////////////////////////////////
                            Constructor
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Initializes the contract during construction.
     *
     * @param _defaultAdmin     The default admin of the contract.
     * @param _name             The name of the contract.
     * @param _symbol           The symbol of the contract.
     * @param _royaltyRecipient The address to receive royalties.
     * @param _royaltyBps       The royalty basis points to be charged. Max = 10000 (10000 = 100%, 1000 = 10%)
     * @param _primarySaleRecipient The address to receive primary sale value.
     */
    constructor(
        address _defaultAdmin,
        string memory _name,
        string memory _symbol,
        address _royaltyRecipient,
        uint128 _royaltyBps,
        address _primarySaleRecipient
    ) ERC721A(_name, _symbol) {
        _setupOwner(_defaultAdmin);
        _setupDefaultRoyaltyInfo(_royaltyRecipient, _royaltyBps);
        _setupPrimarySaleRecipient(_primarySaleRecipient);
    }

    /*//////////////////////////////////////////////////////////////
                            ERC165 Logic
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev See ERC165: https://eips.ethereum.org/EIPS/eip-165
     * @inheritdoc IERC165
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721A, IERC165) returns (bool) {
        return
            interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
            interfaceId == 0x80ac58cd || // ERC165 Interface ID for ERC721
            interfaceId == 0x5b5e139f || // ERC165 Interface ID for ERC721Metadata
            interfaceId == type(IERC2981).interfaceId; // ERC165 ID for ERC2981
    }

    /*///////////////////////////////////////////////////////////////
                    Overriden ERC 721 logic
    //////////////////////////////////////////////////////////////*/

    /**
     *  @notice         Returns the metadata URI for an NFT.
     *  @dev            See `BatchMintMetadata` for handling of metadata in this contract.
     *
     *  @param _tokenId The tokenId of an NFT.
     */
    function tokenURI(uint256 _tokenId) public view virtual override returns (string memory) {
        (uint256 batchId, ) = _getBatchId(_tokenId);
        string memory batchUri = _getBaseURI(_tokenId);

        if (isEncryptedBatch(batchId)) {
            return string(abi.encodePacked(batchUri, "0"));
        } else {
            return string(abi.encodePacked(batchUri, _tokenId.toString()));
        }
    }

    /*///////////////////////////////////////////////////////////////
                    Overriden lazy minting logic
    //////////////////////////////////////////////////////////////*/

    /**
     *  @notice                  Lets an authorized address lazy mint a given amount of NFTs.
     *
     *  @param _amount           The number of NFTs to lazy mint.
     *  @param _baseURIForTokens The placeholder base URI for the 'n' number of NFTs being lazy minted, where the
     *                           metadata for each of those NFTs is `${baseURIForTokens}/${tokenId}`.
     *  @param _data             The encrypted base URI + provenance hash for the batch of NFTs being lazy minted.
     *  @return batchId          A unique integer identifier for the batch of NFTs lazy minted together.
     */
    function lazyMint(
        uint256 _amount,
        string calldata _baseURIForTokens,
        bytes calldata _data
    ) public virtual override returns (uint256 batchId) {
        if (_data.length > 0) {
            (bytes memory encryptedURI, bytes32 provenanceHash) = abi.decode(_data, (bytes, bytes32));
            if (encryptedURI.length != 0 && provenanceHash != "") {
                _setEncryptedData(nextTokenIdToLazyMint + _amount, _data);
            }
        }

        return LazyMint.lazyMint(_amount, _baseURIForTokens, _data);
    }

    /// @notice The tokenId assigned to the next new NFT to be lazy minted.
    function nextTokenIdToMint() public view virtual returns (uint256) {
        return nextTokenIdToLazyMint;
    }

    /// @notice The tokenId assigned to the next new NFT to be claimed.
    function nextTokenIdToClaim() public view virtual returns (uint256) {
        return _currentIndex;
    }

    /*///////////////////////////////////////////////////////////////
                        Delayed reveal logic
    //////////////////////////////////////////////////////////////*/

    /**
     *  @notice       Lets an authorized address reveal a batch of delayed reveal NFTs.
     *
     *  @param _index The ID for the batch of delayed-reveal NFTs to reveal.
     *  @param _key   The key with which the base URI for the relevant batch of NFTs was encrypted.
     */
    function reveal(uint256 _index, bytes calldata _key) public virtual override returns (string memory revealedURI) {
        require(_canReveal(), "Not authorized");

        uint256 batchId = getBatchIdAtIndex(_index);
        revealedURI = getRevealURI(batchId, _key);

        _setEncryptedData(batchId, "");
        _setBaseURI(batchId, revealedURI);

        emit TokenURIRevealed(_index, revealedURI);
    }

    /*//////////////////////////////////////////////////////////////
                        Minting/burning logic
    //////////////////////////////////////////////////////////////*/

    /**
     *  @notice         Lets an owner or approved operator burn the NFT of the given tokenId.
     *  @dev            ERC721A's `_burn(uint256,bool)` internally checks for token approvals.
     *
     *  @param _tokenId The tokenId of the NFT to burn.
     */
    function burn(uint256 _tokenId) external virtual {
        _burn(_tokenId, true);
    }

    /*///////////////////////////////////////////////////////////////
                        Internal functions
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Runs before every `claim` function call.
     *
     * @param _quantity The quantity of NFTs being claimed.
     */
    function _beforeClaim(
        address,
        uint256 _quantity,
        address,
        uint256,
        AllowlistProof calldata,
        bytes memory
    ) internal view virtual override {
        if (_currentIndex + _quantity > nextTokenIdToLazyMint) {
            revert("Not enough minted tokens");
        }
    }

    /**
     * @dev Collects and distributes the primary sale value of NFTs being claimed.
     *
     * @param _primarySaleRecipient The address to receive the primary sale value.
     * @param _quantityToClaim      The quantity of NFTs being claimed.
     * @param _currency             The currency in which the NFTs are being claimed.
     * @param _pricePerToken        The price per token in the given currency.
     */
    function _collectPriceOnClaim(
        address _primarySaleRecipient,
        uint256 _quantityToClaim,
        address _currency,
        uint256 _pricePerToken
    ) internal virtual override {
        if (_pricePerToken == 0) {
            require(msg.value == 0, "!Value");
            return;
        }

        uint256 totalPrice = _quantityToClaim * _pricePerToken;

        bool validMsgValue;
        if (_currency == CurrencyTransferLib.NATIVE_TOKEN) {
            validMsgValue = msg.value == totalPrice;
        } else {
            validMsgValue = msg.value == 0;
        }
        require(validMsgValue, "Invalid msg value");

        address saleRecipient = _primarySaleRecipient == address(0) ? primarySaleRecipient() : _primarySaleRecipient;
        CurrencyTransferLib.transferCurrency(_currency, msg.sender, saleRecipient, totalPrice);
    }

    /**
     * @dev Transfers the NFTs being claimed.
     *
     * @param _to                    The address to which the NFTs are being transferred.
     * @param _quantityBeingClaimed  The quantity of NFTs being claimed.
     */
    function _transferTokensOnClaim(
        address _to,
        uint256 _quantityBeingClaimed
    ) internal virtual override returns (uint256 startTokenId) {
        startTokenId = _currentIndex;
        _safeMint(_to, _quantityBeingClaimed);
    }

    /// @dev Checks whether primary sale recipient can be set in the given execution context.
    function _canSetPrimarySaleRecipient() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Checks whether owner can be set in the given execution context.
    function _canSetOwner() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Checks whether royalty info can be set in the given execution context.
    function _canSetRoyaltyInfo() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Checks whether contract metadata can be set in the given execution context.
    function _canSetContractURI() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Checks whether platform fee info can be set in the given execution context.
    function _canSetClaimConditions() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Returns whether lazy minting can be done in the given execution context.
    function _canLazyMint() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }

    /// @dev Checks whether NFTs can be revealed in the given execution context.
    function _canReveal() internal view virtual returns (bool) {
        return msg.sender == owner();
    }

    /*///////////////////////////////////////////////////////////////
                        Miscellaneous
    //////////////////////////////////////////////////////////////*/

    function _dropMsgSender() internal view virtual override returns (address) {
        return msg.sender;
    }

    /// @notice Returns the sender in the given execution context.
    function _msgSender() internal view override(Multicall, Context) returns (address) {
        return msg.sender;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./interface/IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

File 4 of 36 : ERC721AVirtualApprove.sol
// SPDX-License-Identifier: MIT
// ERC721A Contracts v3.3.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

////////// CHANGELOG: turn `approve` to virtual //////////

import "./interface/IERC721A.sol";
import "./interface/IERC721Receiver.sol";
import "../lib/Address.sol";
import "../external-deps/openzeppelin/utils/Context.sol";
import "../lib/Strings.sol";
import "./ERC165.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension. Built to optimize for lower gas during batch mints.
 *
 * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).
 *
 * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 *
 * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721A is Context, ERC165, IERC721A {
    using Address for address;
    using Strings for uint256;

    // The tokenId of the next token to be minted.
    uint256 internal _currentIndex;

    // The number of tokens burned.
    uint256 internal _burnCounter;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to ownership details
    // An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details.
    mapping(uint256 => TokenOwnership) internal _ownerships;

    // Mapping owner address to address data
    mapping(address => AddressData) private _addressData;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
        _currentIndex = _startTokenId();
    }

    /**
     * To change the starting tokenId, please override this function.
     */
    function _startTokenId() internal view virtual returns (uint256) {
        return 0;
    }

    /**
     * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
     */
    function totalSupply() public view override returns (uint256) {
        // Counter underflow is impossible as _burnCounter cannot be incremented
        // more than _currentIndex - _startTokenId() times
        unchecked {
            return _currentIndex - _burnCounter - _startTokenId();
        }
    }

    /**
     * Returns the total amount of tokens minted in the contract.
     */
    function _totalMinted() internal view returns (uint256) {
        // Counter underflow is impossible as _currentIndex does not decrement,
        // and it is initialized to _startTokenId()
        unchecked {
            return _currentIndex - _startTokenId();
        }
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view override returns (uint256) {
        if (owner == address(0)) revert BalanceQueryForZeroAddress();
        return uint256(_addressData[owner].balance);
    }

    /**
     * Returns the number of tokens minted by `owner`.
     */
    function _numberMinted(address owner) internal view returns (uint256) {
        return uint256(_addressData[owner].numberMinted);
    }

    /**
     * Returns the number of tokens burned by or on behalf of `owner`.
     */
    function _numberBurned(address owner) internal view returns (uint256) {
        return uint256(_addressData[owner].numberBurned);
    }

    /**
     * Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
     */
    function _getAux(address owner) internal view returns (uint64) {
        return _addressData[owner].aux;
    }

    /**
     * Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
     * If there are multiple variables, please pack them into a uint64.
     */
    function _setAux(address owner, uint64 aux) internal {
        _addressData[owner].aux = aux;
    }

    /**
     * Gas spent here starts off proportional to the maximum mint batch size.
     * It gradually moves to O(1) as tokens get transferred around in the collection over time.
     */
    function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
        uint256 curr = tokenId;

        unchecked {
            if (_startTokenId() <= curr)
                if (curr < _currentIndex) {
                    TokenOwnership memory ownership = _ownerships[curr];
                    if (!ownership.burned) {
                        if (ownership.addr != address(0)) {
                            return ownership;
                        }
                        // Invariant:
                        // There will always be an ownership that has an address and is not burned
                        // before an ownership that does not have an address and is not burned.
                        // Hence, curr will not underflow.
                        while (true) {
                            curr--;
                            ownership = _ownerships[curr];
                            if (ownership.addr != address(0)) {
                                return ownership;
                            }
                        }
                    }
                }
        }
        revert OwnerQueryForNonexistentToken();
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view override returns (address) {
        return _ownershipOf(tokenId).addr;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

        string memory baseURI = _baseURI();
        return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overriden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721A.ownerOf(tokenId);
        if (to == owner) revert ApprovalToCurrentOwner();

        if (_msgSender() != owner)
            if (!isApprovedForAll(owner, _msgSender())) {
                revert ApprovalCallerNotOwnerNorApproved();
            }

        _approve(to, tokenId, owner);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view override returns (address) {
        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        if (operator == _msgSender()) revert ApproveToCaller();

        _operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(address from, address to, uint256 tokenId) public virtual override {
        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
        _transfer(from, to, tokenId);
        if (to.isContract())
            if (!_checkContractOnERC721Received(from, to, tokenId, _data)) {
                revert TransferToNonERC721ReceiverImplementer();
            }
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     */
    function _exists(uint256 tokenId) internal view returns (bool) {
        return _startTokenId() <= tokenId && tokenId < _currentIndex && !_ownerships[tokenId].burned;
    }

    /**
     * @dev Equivalent to `_safeMint(to, quantity, '')`.
     */
    function _safeMint(address to, uint256 quantity) internal {
        _safeMint(to, quantity, "");
    }

    /**
     * @dev Safely mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement
     *   {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 quantity, bytes memory _data) internal {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
        unchecked {
            _addressData[to].balance += uint64(quantity);
            _addressData[to].numberMinted += uint64(quantity);

            _ownerships[startTokenId].addr = to;
            _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);

            uint256 updatedIndex = startTokenId;
            uint256 end = updatedIndex + quantity;

            if (to.isContract()) {
                do {
                    emit Transfer(address(0), to, updatedIndex);
                    if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {
                        revert TransferToNonERC721ReceiverImplementer();
                    }
                } while (updatedIndex < end);
                // Reentrancy protection
                if (_currentIndex != startTokenId) revert();
            } else {
                do {
                    emit Transfer(address(0), to, updatedIndex++);
                } while (updatedIndex < end);
            }
            _currentIndex = updatedIndex;
        }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 quantity) internal {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
        unchecked {
            _addressData[to].balance += uint64(quantity);
            _addressData[to].numberMinted += uint64(quantity);

            _ownerships[startTokenId].addr = to;
            _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);

            uint256 updatedIndex = startTokenId;
            uint256 end = updatedIndex + quantity;

            do {
                emit Transfer(address(0), to, updatedIndex++);
            } while (updatedIndex < end);

            _currentIndex = updatedIndex;
        }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(address from, address to, uint256 tokenId) private {
        TokenOwnership memory prevOwnership = _ownershipOf(tokenId);

        if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();

        bool isApprovedOrOwner = (_msgSender() == from ||
            isApprovedForAll(from, _msgSender()) ||
            getApproved(tokenId) == _msgSender());

        if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        if (to == address(0)) revert TransferToZeroAddress();

        _beforeTokenTransfers(from, to, tokenId, 1);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId, from);

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            _addressData[from].balance -= 1;
            _addressData[to].balance += 1;

            TokenOwnership storage currSlot = _ownerships[tokenId];
            currSlot.addr = to;
            currSlot.startTimestamp = uint64(block.timestamp);

            // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            TokenOwnership storage nextSlot = _ownerships[nextTokenId];
            if (nextSlot.addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId != _currentIndex) {
                    nextSlot.addr = from;
                    nextSlot.startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(from, to, tokenId);
        _afterTokenTransfers(from, to, tokenId, 1);
    }

    /**
     * @dev Equivalent to `_burn(tokenId, false)`.
     */
    function _burn(uint256 tokenId) internal virtual {
        _burn(tokenId, false);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
        TokenOwnership memory prevOwnership = _ownershipOf(tokenId);

        address from = prevOwnership.addr;

        if (approvalCheck) {
            bool isApprovedOrOwner = (_msgSender() == from ||
                isApprovedForAll(from, _msgSender()) ||
                getApproved(tokenId) == _msgSender());

            if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        }

        _beforeTokenTransfers(from, address(0), tokenId, 1);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId, from);

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            AddressData storage addressData = _addressData[from];
            addressData.balance -= 1;
            addressData.numberBurned += 1;

            // Keep track of who burned the token, and the timestamp of burning.
            TokenOwnership storage currSlot = _ownerships[tokenId];
            currSlot.addr = from;
            currSlot.startTimestamp = uint64(block.timestamp);
            currSlot.burned = true;

            // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            TokenOwnership storage nextSlot = _ownerships[nextTokenId];
            if (nextSlot.addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId != _currentIndex) {
                    nextSlot.addr = from;
                    nextSlot.startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(from, address(0), tokenId);
        _afterTokenTransfers(from, address(0), tokenId, 1);

        // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
        unchecked {
            _burnCounter++;
        }
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(address to, uint256 tokenId, address owner) private {
        _tokenApprovals[tokenId] = to;
        emit Approval(owner, to, tokenId);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkContractOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
            return retval == IERC721Receiver(to).onERC721Received.selector;
        } catch (bytes memory reason) {
            if (reason.length == 0) {
                revert TransferToNonERC721ReceiverImplementer();
            } else {
                assembly {
                    revert(add(32, reason), mload(reason))
                }
            }
        }
    }

    /**
     * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
     * And also called before burning one token.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, `tokenId` will be burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _beforeTokenTransfers(address from, address to, uint256 startTokenId, uint256 quantity) internal virtual {}

    /**
     * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
     * minting.
     * And also called after one token has been burned.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
     * transferred to `to`.
     * - When `from` is zero, `tokenId` has been minted for `to`.
     * - When `to` is zero, `tokenId` has been burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _afterTokenTransfers(address from, address to, uint256 startTokenId, uint256 quantity) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * [EIP](https://eips.ethereum.org/EIPS/eip-165).
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
interface IERC20 {
    function totalSupply() external view returns (uint256);

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

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

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

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

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

    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// SPDX-License-Identifier: Apache 2.0
pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Interface for the NFT Royalty Standard.
 *
 * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
 * support for royalty payments across all NFT marketplaces and ecosystem participants.
 *
 * _Available since v4.5._
 */
interface IERC2981 is IERC165 {
    /**
     * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
     * exchange. The royalty amount is denominated and should be payed in that same unit of exchange.
     */
    function royaltyInfo(
        uint256 tokenId,
        uint256 salePrice
    ) external view returns (address receiver, uint256 royaltyAmount);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}

// SPDX-License-Identifier: MIT
// ERC721A Contracts v3.3.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import "./IERC721.sol";
import "./IERC721Metadata.sol";

/**
 * @dev Interface of an ERC721A compliant contract.
 */
interface IERC721A is IERC721, IERC721Metadata {
    /**
     * The caller must own the token or be an approved operator.
     */
    error ApprovalCallerNotOwnerNorApproved();

    /**
     * The token does not exist.
     */
    error ApprovalQueryForNonexistentToken();

    /**
     * The caller cannot approve to their own address.
     */
    error ApproveToCaller();

    /**
     * The caller cannot approve to the current owner.
     */
    error ApprovalToCurrentOwner();

    /**
     * Cannot query the balance for the zero address.
     */
    error BalanceQueryForZeroAddress();

    /**
     * Cannot mint to the zero address.
     */
    error MintToZeroAddress();

    /**
     * The quantity of tokens minted must be more than zero.
     */
    error MintZeroQuantity();

    /**
     * The token does not exist.
     */
    error OwnerQueryForNonexistentToken();

    /**
     * The caller must own the token or be an approved operator.
     */
    error TransferCallerNotOwnerNorApproved();

    /**
     * The token must be owned by `from`.
     */
    error TransferFromIncorrectOwner();

    /**
     * Cannot safely transfer to a contract that does not implement the ERC721Receiver interface.
     */
    error TransferToNonERC721ReceiverImplementer();

    /**
     * Cannot transfer to the zero address.
     */
    error TransferToZeroAddress();

    /**
     * The token does not exist.
     */
    error URIQueryForNonexistentToken();

    // Compiler will pack this into a single 256bit word.
    struct TokenOwnership {
        // The address of the owner.
        address addr;
        // Keeps track of the start time of ownership with minimal overhead for tokenomics.
        uint64 startTimestamp;
        // Whether the token has been burned.
        bool burned;
    }

    // Compiler will pack this into a single 256bit word.
    struct AddressData {
        // Realistically, 2**64-1 is more than enough.
        uint64 balance;
        // Keeps track of mint count with minimal overhead for tokenomics.
        uint64 numberMinted;
        // Keeps track of burn count with minimal overhead for tokenomics.
        uint64 numberBurned;
        // For miscellaneous variable(s) pertaining to the address
        // (e.g. number of whitelist mint slots used).
        // If there are multiple variables, please pack them into a uint64.
        uint64 aux;
    }

    /**
     * @dev Returns the total amount of tokens stored by the contract.
     *
     * Burned tokens are calculated here, use `_totalMinted()` if you want to count just minted tokens.
     */
    function totalSupply() external view returns (uint256);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @title ERC-721 Non-Fungible Token Standard, optional metadata extension
/// @dev See https://eips.ethereum.org/EIPS/eip-721
///  Note: the ERC-165 identifier for this interface is 0x5b5e139f.
/* is ERC721 */
interface IERC721Metadata {
    /// @notice A descriptive name for a collection of NFTs in this contract
    function name() external view returns (string memory);

    /// @notice An abbreviated name for NFTs in this contract
    function symbol() external view returns (string memory);

    /// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
    /// @dev Throws if `_tokenId` is not a valid NFT. URIs are defined in RFC
    ///  3986. The URI may point to a JSON file that conforms to the "ERC721
    ///  Metadata JSON Schema".
    function tokenURI(uint256 _tokenId) external view returns (string memory);
}

File 11 of 36 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

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

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 *  @title   Batch-mint Metadata
 *  @notice  The `BatchMintMetadata` is a contract extension for any base NFT contract. It lets the smart contract
 *           using this extension set metadata for `n` number of NFTs all at once. This is enabled by storing a single
 *           base URI for a batch of `n` NFTs, where the metadata for each NFT in a relevant batch is `baseURI/tokenId`.
 */

contract BatchMintMetadata {
    /// @dev Invalid index for batch
    error BatchMintInvalidBatchId(uint256 index);

    /// @dev Invalid token
    error BatchMintInvalidTokenId(uint256 tokenId);

    /// @dev Metadata frozen
    error BatchMintMetadataFrozen(uint256 batchId);

    /// @dev Largest tokenId of each batch of tokens with the same baseURI + 1 {ex: batchId 100 at position 0 includes tokens 0-99}
    uint256[] private batchIds;

    /// @dev Mapping from id of a batch of tokens => to base URI for the respective batch of tokens.
    mapping(uint256 => string) private baseURI;

    /// @dev Mapping from id of a batch of tokens => to whether the base URI for the respective batch of tokens is frozen.
    mapping(uint256 => bool) public batchFrozen;

    /// @dev This event emits when the metadata of all tokens are frozen.
    /// While not currently supported by marketplaces, this event allows
    /// future indexing if desired.
    event MetadataFrozen();

    // @dev This event emits when the metadata of a range of tokens is updated.
    /// So that the third-party platforms such as NFT market could
    /// timely update the images and related attributes of the NFTs.
    event BatchMetadataUpdate(uint256 _fromTokenId, uint256 _toTokenId);

    /**
     *  @notice         Returns the count of batches of NFTs.
     *  @dev            Each batch of tokens has an in ID and an associated `baseURI`.
     *                  See {batchIds}.
     */
    function getBaseURICount() public view returns (uint256) {
        return batchIds.length;
    }

    /**
     *  @notice         Returns the ID for the batch of tokens at the given index.
     *  @dev            See {getBaseURICount}.
     *  @param _index   Index of the desired batch in batchIds array.
     */
    function getBatchIdAtIndex(uint256 _index) public view returns (uint256) {
        if (_index >= getBaseURICount()) {
            revert BatchMintInvalidBatchId(_index);
        }
        return batchIds[_index];
    }

    /// @dev Returns the id for the batch of tokens the given tokenId belongs to.
    function _getBatchId(uint256 _tokenId) internal view returns (uint256 batchId, uint256 index) {
        uint256 numOfTokenBatches = getBaseURICount();
        uint256[] memory indices = batchIds;

        for (uint256 i = 0; i < numOfTokenBatches; i += 1) {
            if (_tokenId < indices[i]) {
                index = i;
                batchId = indices[i];

                return (batchId, index);
            }
        }

        revert BatchMintInvalidTokenId(_tokenId);
    }

    /// @dev Returns the baseURI for a token. The intended metadata URI for the token is baseURI + tokenId.
    function _getBaseURI(uint256 _tokenId) internal view returns (string memory) {
        uint256 numOfTokenBatches = getBaseURICount();
        uint256[] memory indices = batchIds;

        for (uint256 i = 0; i < numOfTokenBatches; i += 1) {
            if (_tokenId < indices[i]) {
                return baseURI[indices[i]];
            }
        }

        revert BatchMintInvalidTokenId(_tokenId);
    }

    /// @dev returns the starting tokenId of a given batchId.
    function _getBatchStartId(uint256 _batchID) internal view returns (uint256) {
        uint256 numOfTokenBatches = getBaseURICount();
        uint256[] memory indices = batchIds;

        for (uint256 i = 0; i < numOfTokenBatches; i++) {
            if (_batchID == indices[i]) {
                if (i > 0) {
                    return indices[i - 1];
                }
                return 0;
            }
        }

        revert BatchMintInvalidBatchId(_batchID);
    }

    /// @dev Sets the base URI for the batch of tokens with the given batchId.
    function _setBaseURI(uint256 _batchId, string memory _baseURI) internal {
        if (batchFrozen[_batchId]) {
            revert BatchMintMetadataFrozen(_batchId);
        }
        baseURI[_batchId] = _baseURI;
        emit BatchMetadataUpdate(_getBatchStartId(_batchId), _batchId);
    }

    /// @dev Freezes the base URI for the batch of tokens with the given batchId.
    function _freezeBaseURI(uint256 _batchId) internal {
        string memory baseURIForBatch = baseURI[_batchId];
        if (bytes(baseURIForBatch).length == 0) {
            revert BatchMintInvalidBatchId(_batchId);
        }
        batchFrozen[_batchId] = true;
        emit MetadataFrozen();
    }

    /// @dev Mints a batch of tokenIds and associates a common baseURI to all those Ids.
    function _batchMintMetadata(
        uint256 _startId,
        uint256 _amountToMint,
        string memory _baseURIForTokens
    ) internal returns (uint256 nextTokenIdToMint, uint256 batchId) {
        batchId = _startId + _amountToMint;
        nextTokenIdToMint = batchId;

        batchIds.push(batchId);

        baseURI[batchId] = _baseURIForTokens;
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "./interface/IContractMetadata.sol";

/**
 *  @title   Contract Metadata
 *  @notice  Thirdweb's `ContractMetadata` is a contract extension for any base contracts. It lets you set a metadata URI
 *           for you contract.
 *           Additionally, `ContractMetadata` is necessary for NFT contracts that want royalties to get distributed on OpenSea.
 */

abstract contract ContractMetadata is IContractMetadata {
    /// @dev The sender is not authorized to perform the action
    error ContractMetadataUnauthorized();

    /// @notice Returns the contract metadata URI.
    string public override contractURI;

    /**
     *  @notice         Lets a contract admin set the URI for contract-level metadata.
     *  @dev            Caller should be authorized to setup contractURI, e.g. contract admin.
     *                  See {_canSetContractURI}.
     *                  Emits {ContractURIUpdated Event}.
     *
     *  @param _uri     keccak256 hash of the role. e.g. keccak256("TRANSFER_ROLE")
     */
    function setContractURI(string memory _uri) external override {
        if (!_canSetContractURI()) {
            revert ContractMetadataUnauthorized();
        }

        _setupContractURI(_uri);
    }

    /// @dev Lets a contract admin set the URI for contract-level metadata.
    function _setupContractURI(string memory _uri) internal {
        string memory prevURI = contractURI;
        contractURI = _uri;

        emit ContractURIUpdated(prevURI, _uri);
    }

    /// @dev Returns whether contract metadata can be set in the given execution context.
    function _canSetContractURI() internal view virtual returns (bool);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "./interface/IDelayedReveal.sol";

/**
 *  @title   Delayed Reveal
 *  @notice  Thirdweb's `DelayedReveal` is a contract extension for base NFT contracts. It lets you create batches of
 *           'delayed-reveal' NFTs. You can learn more about the usage of delayed reveal NFTs here - https://blog.thirdweb.com/delayed-reveal-nfts
 */

abstract contract DelayedReveal is IDelayedReveal {
    /// @dev The contract doesn't have any url to be delayed revealed
    error DelayedRevealNothingToReveal();

    /// @dev The result of the returned an incorrect hash
    error DelayedRevealIncorrectResultHash(bytes32 expected, bytes32 actual);

    /// @dev Mapping from tokenId of a batch of tokens => to delayed reveal data.
    mapping(uint256 => bytes) public encryptedData;

    /// @dev Sets the delayed reveal data for a batchId.
    function _setEncryptedData(uint256 _batchId, bytes memory _encryptedData) internal {
        encryptedData[_batchId] = _encryptedData;
    }

    /**
     *  @notice             Returns revealed URI for a batch of NFTs.
     *  @dev                Reveal encrypted base URI for `_batchId` with caller/admin's `_key` used for encryption.
     *                      Reverts if there's no encrypted URI for `_batchId`.
     *                      See {encryptDecrypt}.
     *
     *  @param _batchId     ID of the batch for which URI is being revealed.
     *  @param _key         Secure key used by caller/admin for encryption of baseURI.
     *
     *  @return revealedURI Decrypted base URI.
     */
    function getRevealURI(uint256 _batchId, bytes calldata _key) public view returns (string memory revealedURI) {
        bytes memory data = encryptedData[_batchId];
        if (data.length == 0) {
            revert DelayedRevealNothingToReveal();
        }

        (bytes memory encryptedURI, bytes32 provenanceHash) = abi.decode(data, (bytes, bytes32));

        revealedURI = string(encryptDecrypt(encryptedURI, _key));

        if (keccak256(abi.encodePacked(revealedURI, _key, block.chainid)) != provenanceHash) {
            revert DelayedRevealIncorrectResultHash(
                provenanceHash,
                keccak256(abi.encodePacked(revealedURI, _key, block.chainid))
            );
        }
    }

    /**
     *  @notice         Encrypt/decrypt data on chain.
     *  @dev            Encrypt/decrypt given `data` with `key`. Uses inline assembly.
     *                  See: https://ethereum.stackexchange.com/questions/69825/decrypt-message-on-chain
     *
     *  @param data     Bytes of data to encrypt/decrypt.
     *  @param key      Secure key used by caller for encryption/decryption.
     *
     *  @return result  Output after encryption/decryption of given data.
     */
    function encryptDecrypt(bytes memory data, bytes calldata key) public pure override returns (bytes memory result) {
        // Store data length on stack for later use
        uint256 length = data.length;

        // solhint-disable-next-line no-inline-assembly
        assembly {
            // Set result to free memory pointer
            result := mload(0x40)
            // Increase free memory pointer by lenght + 32
            mstore(0x40, add(add(result, length), 32))
            // Set result length
            mstore(result, length)
        }

        // Iterate over the data stepping by 32 bytes
        for (uint256 i = 0; i < length; i += 32) {
            // Generate hash of the key and offset
            bytes32 hash = keccak256(abi.encodePacked(key, i));

            bytes32 chunk;
            // solhint-disable-next-line no-inline-assembly
            assembly {
                // Read 32-bytes data chunk
                chunk := mload(add(data, add(i, 32)))
            }
            // XOR the chunk with hash
            chunk ^= hash;
            // solhint-disable-next-line no-inline-assembly
            assembly {
                // Write 32-byte encrypted chunk
                mstore(add(result, add(i, 32)), chunk)
            }
        }
    }

    /**
     *  @notice         Returns whether the relvant batch of NFTs is subject to a delayed reveal.
     *  @dev            Returns `true` if `_batchId`'s base URI is encrypted.
     *  @param _batchId ID of a batch of NFTs.
     */
    function isEncryptedBatch(uint256 _batchId) public view returns (bool) {
        return encryptedData[_batchId].length > 0;
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "./interface/IDropSinglePhase.sol";
import "../lib/MerkleProof.sol";

abstract contract DropSinglePhase is IDropSinglePhase {
    /// @dev The sender is not authorized to perform the action
    error DropUnauthorized();

    /// @dev Exceeded the max token total supply
    error DropExceedMaxSupply();

    /// @dev No active claim condition
    error DropNoActiveCondition();

    /// @dev Claim condition invalid currency or price
    error DropClaimInvalidTokenPrice(
        address expectedCurrency,
        uint256 expectedPricePerToken,
        address actualCurrency,
        uint256 actualExpectedPricePerToken
    );

    /// @dev Claim condition exceeded limit
    error DropClaimExceedLimit(uint256 expected, uint256 actual);

    /// @dev Claim condition exceeded max supply
    error DropClaimExceedMaxSupply(uint256 expected, uint256 actual);

    /// @dev Claim condition not started yet
    error DropClaimNotStarted(uint256 expected, uint256 actual);

    /*///////////////////////////////////////////////////////////////
                            State variables
    //////////////////////////////////////////////////////////////*/

    /// @dev The active conditions for claiming tokens.
    ClaimCondition public claimCondition;

    /// @dev The ID for the active claim condition.
    bytes32 private conditionId;

    /*///////////////////////////////////////////////////////////////
                                Mappings
    //////////////////////////////////////////////////////////////*/

    /**
     *  @dev Map from a claim condition uid and account to supply claimed by account.
     */
    mapping(bytes32 => mapping(address => uint256)) private supplyClaimedByWallet;

    /*///////////////////////////////////////////////////////////////
                            Drop logic
    //////////////////////////////////////////////////////////////*/

    /// @dev Lets an account claim tokens.
    function claim(
        address _receiver,
        uint256 _quantity,
        address _currency,
        uint256 _pricePerToken,
        AllowlistProof calldata _allowlistProof,
        bytes memory _data
    ) public payable virtual override {
        _beforeClaim(_receiver, _quantity, _currency, _pricePerToken, _allowlistProof, _data);

        bytes32 activeConditionId = conditionId;

        verifyClaim(_dropMsgSender(), _quantity, _currency, _pricePerToken, _allowlistProof);

        // Update contract state.
        claimCondition.supplyClaimed += _quantity;
        supplyClaimedByWallet[activeConditionId][_dropMsgSender()] += _quantity;

        // If there's a price, collect price.
        _collectPriceOnClaim(address(0), _quantity, _currency, _pricePerToken);

        // Mint the relevant NFTs to claimer.
        uint256 startTokenId = _transferTokensOnClaim(_receiver, _quantity);

        emit TokensClaimed(_dropMsgSender(), _receiver, startTokenId, _quantity);

        _afterClaim(_receiver, _quantity, _currency, _pricePerToken, _allowlistProof, _data);
    }

    /// @dev Lets a contract admin set claim conditions.
    function setClaimConditions(ClaimCondition calldata _condition, bool _resetClaimEligibility) external override {
        if (!_canSetClaimConditions()) {
            revert DropUnauthorized();
        }

        bytes32 targetConditionId = conditionId;
        uint256 supplyClaimedAlready = claimCondition.supplyClaimed;

        if (_resetClaimEligibility) {
            supplyClaimedAlready = 0;
            targetConditionId = keccak256(abi.encodePacked(_dropMsgSender(), block.number));
        }

        if (supplyClaimedAlready > _condition.maxClaimableSupply) {
            revert DropExceedMaxSupply();
        }

        claimCondition = ClaimCondition({
            startTimestamp: _condition.startTimestamp,
            maxClaimableSupply: _condition.maxClaimableSupply,
            supplyClaimed: supplyClaimedAlready,
            quantityLimitPerWallet: _condition.quantityLimitPerWallet,
            merkleRoot: _condition.merkleRoot,
            pricePerToken: _condition.pricePerToken,
            currency: _condition.currency,
            metadata: _condition.metadata
        });
        conditionId = targetConditionId;

        emit ClaimConditionUpdated(_condition, _resetClaimEligibility);
    }

    /// @dev Checks a request to claim NFTs against the active claim condition's criteria.
    function verifyClaim(
        address _claimer,
        uint256 _quantity,
        address _currency,
        uint256 _pricePerToken,
        AllowlistProof calldata _allowlistProof
    ) public view virtual returns (bool isOverride) {
        ClaimCondition memory currentClaimPhase = claimCondition;
        uint256 claimLimit = currentClaimPhase.quantityLimitPerWallet;
        uint256 claimPrice = currentClaimPhase.pricePerToken;
        address claimCurrency = currentClaimPhase.currency;

        /*
         * Here `isOverride` implies that if the merkle proof verification fails,
         * the claimer would claim through open claim limit instead of allowlisted limit.
         */
        if (currentClaimPhase.merkleRoot != bytes32(0)) {
            (isOverride, ) = MerkleProof.verify(
                _allowlistProof.proof,
                currentClaimPhase.merkleRoot,
                keccak256(
                    abi.encodePacked(
                        _claimer,
                        _allowlistProof.quantityLimitPerWallet,
                        _allowlistProof.pricePerToken,
                        _allowlistProof.currency
                    )
                )
            );
        }

        if (isOverride) {
            claimLimit = _allowlistProof.quantityLimitPerWallet != 0
                ? _allowlistProof.quantityLimitPerWallet
                : claimLimit;
            claimPrice = _allowlistProof.pricePerToken != type(uint256).max
                ? _allowlistProof.pricePerToken
                : claimPrice;
            claimCurrency = _allowlistProof.pricePerToken != type(uint256).max && _allowlistProof.currency != address(0)
                ? _allowlistProof.currency
                : claimCurrency;
        }

        uint256 _supplyClaimedByWallet = supplyClaimedByWallet[conditionId][_claimer];

        if (_currency != claimCurrency || _pricePerToken != claimPrice) {
            revert DropClaimInvalidTokenPrice(_currency, _pricePerToken, claimCurrency, claimPrice);
        }

        if (_quantity == 0 || (_quantity + _supplyClaimedByWallet > claimLimit)) {
            revert DropClaimExceedLimit(claimLimit, _quantity + _supplyClaimedByWallet);
        }

        if (currentClaimPhase.supplyClaimed + _quantity > currentClaimPhase.maxClaimableSupply) {
            revert DropClaimExceedMaxSupply(
                currentClaimPhase.maxClaimableSupply,
                currentClaimPhase.supplyClaimed + _quantity
            );
        }

        if (currentClaimPhase.startTimestamp > block.timestamp) {
            revert DropClaimNotStarted(currentClaimPhase.startTimestamp, block.timestamp);
        }
    }

    /// @dev Returns the supply claimed by claimer for active conditionId.
    function getSupplyClaimedByWallet(address _claimer) public view returns (uint256) {
        return supplyClaimedByWallet[conditionId][_claimer];
    }

    /*////////////////////////////////////////////////////////////////////
        Optional hooks that can be implemented in the derived contract
    ///////////////////////////////////////////////////////////////////*/

    /// @dev Exposes the ability to override the msg sender.
    function _dropMsgSender() internal virtual returns (address) {
        return msg.sender;
    }

    /// @dev Runs before every `claim` function call.
    function _beforeClaim(
        address _receiver,
        uint256 _quantity,
        address _currency,
        uint256 _pricePerToken,
        AllowlistProof calldata _allowlistProof,
        bytes memory _data
    ) internal virtual {}

    /// @dev Runs after every `claim` function call.
    function _afterClaim(
        address _receiver,
        uint256 _quantity,
        address _currency,
        uint256 _pricePerToken,
        AllowlistProof calldata _allowlistProof,
        bytes memory _data
    ) internal virtual {}

    /// @dev Collects and distributes the primary sale value of NFTs being claimed.
    function _collectPriceOnClaim(
        address _primarySaleRecipient,
        uint256 _quantityToClaim,
        address _currency,
        uint256 _pricePerToken
    ) internal virtual;

    /// @dev Transfers the NFTs being claimed.
    function _transferTokensOnClaim(
        address _to,
        uint256 _quantityBeingClaimed
    ) internal virtual returns (uint256 startTokenId);

    function _canSetClaimConditions() internal view virtual returns (bool);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "./interface/ILazyMint.sol";
import "./BatchMintMetadata.sol";

/**
 *  The `LazyMint` is a contract extension for any base NFT contract. It lets you 'lazy mint' any number of NFTs
 *  at once. Here, 'lazy mint' means defining the metadata for particular tokenIds of your NFT contract, without actually
 *  minting a non-zero balance of NFTs of those tokenIds.
 */

abstract contract LazyMint is ILazyMint, BatchMintMetadata {
    /// @dev The sender is not authorized to perform the action
    error LazyMintUnauthorized();
    error LazyMintInvalidAmount();

    /// @notice The tokenId assigned to the next new NFT to be lazy minted.
    uint256 internal nextTokenIdToLazyMint;

    /**
     *  @notice                  Lets an authorized address lazy mint a given amount of NFTs.
     *
     *  @param _amount           The number of NFTs to lazy mint.
     *  @param _baseURIForTokens The base URI for the 'n' number of NFTs being lazy minted, where the metadata for each
     *                           of those NFTs is `${baseURIForTokens}/${tokenId}`.
     *  @param _data             Additional bytes data to be used at the discretion of the consumer of the contract.
     *  @return batchId          A unique integer identifier for the batch of NFTs lazy minted together.
     */
    function lazyMint(
        uint256 _amount,
        string calldata _baseURIForTokens,
        bytes calldata _data
    ) public virtual override returns (uint256 batchId) {
        if (!_canLazyMint()) {
            revert LazyMintUnauthorized();
        }

        if (_amount == 0) {
            revert LazyMintInvalidAmount();
        }

        uint256 startId = nextTokenIdToLazyMint;

        (nextTokenIdToLazyMint, batchId) = _batchMintMetadata(startId, _amount, _baseURIForTokens);

        emit TokensLazyMinted(startId, startId + _amount - 1, _baseURIForTokens, _data);

        return batchId;
    }

    /// @dev Returns whether lazy minting can be performed in the given execution context.
    function _canLazyMint() internal view virtual returns (bool);
}

// SPDX-License-Identifier: Apache 2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "../lib/Address.sol";
import "./interface/IMulticall.sol";

/**
 * @dev Provides a function to batch together multiple calls in a single external call.
 *
 * _Available since v4.1._
 */
contract Multicall is IMulticall {
    /**
     *  @notice Receives and executes a batch of function calls on this contract.
     *  @dev Receives and executes a batch of function calls on this contract.
     *
     *  @param data The bytes data that makes up the batch of function calls to execute.
     *  @return results The bytes data that makes up the result of the batch of function calls executed.
     */
    function multicall(bytes[] calldata data) external returns (bytes[] memory results) {
        results = new bytes[](data.length);
        address sender = _msgSender();
        bool isForwarder = msg.sender != sender;
        for (uint256 i = 0; i < data.length; i++) {
            if (isForwarder) {
                results[i] = Address.functionDelegateCall(address(this), abi.encodePacked(data[i], sender));
            } else {
                results[i] = Address.functionDelegateCall(address(this), data[i]);
            }
        }
        return results;
    }

    /// @notice Returns the sender in the given execution context.
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "./interface/IOwnable.sol";

/**
 *  @title   Ownable
 *  @notice  Thirdweb's `Ownable` is a contract extension to be used with any base contract. It exposes functions for setting and reading
 *           who the 'owner' of the inheriting smart contract is, and lets the inheriting contract perform conditional logic that uses
 *           information about who the contract's owner is.
 */

abstract contract Ownable is IOwnable {
    /// @dev The sender is not authorized to perform the action
    error OwnableUnauthorized();

    /// @dev Owner of the contract (purpose: OpenSea compatibility)
    address private _owner;

    /// @dev Reverts if caller is not the owner.
    modifier onlyOwner() {
        if (msg.sender != _owner) {
            revert OwnableUnauthorized();
        }
        _;
    }

    /**
     *  @notice Returns the owner of the contract.
     */
    function owner() public view override returns (address) {
        return _owner;
    }

    /**
     *  @notice Lets an authorized wallet set a new owner for the contract.
     *  @param _newOwner The address to set as the new owner of the contract.
     */
    function setOwner(address _newOwner) external override {
        if (!_canSetOwner()) {
            revert OwnableUnauthorized();
        }
        _setupOwner(_newOwner);
    }

    /// @dev Lets a contract admin set a new owner for the contract. The new owner must be a contract admin.
    function _setupOwner(address _newOwner) internal {
        address _prevOwner = _owner;
        _owner = _newOwner;

        emit OwnerUpdated(_prevOwner, _newOwner);
    }

    /// @dev Returns whether owner can be set in the given execution context.
    function _canSetOwner() internal view virtual returns (bool);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "./interface/IPrimarySale.sol";

/**
 *  @title   Primary Sale
 *  @notice  Thirdweb's `PrimarySale` is a contract extension to be used with any base contract. It exposes functions for setting and reading
 *           the recipient of primary sales, and lets the inheriting contract perform conditional logic that uses information about
 *           primary sales, if desired.
 */

abstract contract PrimarySale is IPrimarySale {
    /// @dev The sender is not authorized to perform the action
    error PrimarySaleUnauthorized();

    /// @dev The recipient is invalid
    error PrimarySaleInvalidRecipient(address recipient);

    /// @dev The address that receives all primary sales value.
    address private recipient;

    /// @dev Returns primary sale recipient address.
    function primarySaleRecipient() public view override returns (address) {
        return recipient;
    }

    /**
     *  @notice         Updates primary sale recipient.
     *  @dev            Caller should be authorized to set primary sales info.
     *                  See {_canSetPrimarySaleRecipient}.
     *                  Emits {PrimarySaleRecipientUpdated Event}; See {_setupPrimarySaleRecipient}.
     *
     *  @param _saleRecipient   Address to be set as new recipient of primary sales.
     */
    function setPrimarySaleRecipient(address _saleRecipient) external override {
        if (!_canSetPrimarySaleRecipient()) {
            revert PrimarySaleUnauthorized();
        }
        _setupPrimarySaleRecipient(_saleRecipient);
    }

    /// @dev Lets a contract admin set the recipient for all primary sales.
    function _setupPrimarySaleRecipient(address _saleRecipient) internal {
        if (_saleRecipient == address(0)) {
            revert PrimarySaleInvalidRecipient(_saleRecipient);
        }

        recipient = _saleRecipient;
        emit PrimarySaleRecipientUpdated(_saleRecipient);
    }

    /// @dev Returns whether primary sale recipient can be set in the given execution context.
    function _canSetPrimarySaleRecipient() internal view virtual returns (bool);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "./interface/IRoyalty.sol";

/**
 *  @title   Royalty
 *  @notice  Thirdweb's `Royalty` is a contract extension to be used with any base contract. It exposes functions for setting and reading
 *           the recipient of royalty fee and the royalty fee basis points, and lets the inheriting contract perform conditional logic
 *           that uses information about royalty fees, if desired.
 *
 *  @dev     The `Royalty` contract is ERC2981 compliant.
 */

abstract contract Royalty is IRoyalty {
    /// @dev The sender is not authorized to perform the action
    error RoyaltyUnauthorized();

    /// @dev The recipient is invalid
    error RoyaltyInvalidRecipient(address recipient);

    /// @dev The fee bps exceeded the max value
    error RoyaltyExceededMaxFeeBps(uint256 max, uint256 actual);

    /// @dev The (default) address that receives all royalty value.
    address private royaltyRecipient;

    /// @dev The (default) % of a sale to take as royalty (in basis points).
    uint16 private royaltyBps;

    /// @dev Token ID => royalty recipient and bps for token
    mapping(uint256 => RoyaltyInfo) private royaltyInfoForToken;

    /**
     *  @notice   View royalty info for a given token and sale price.
     *  @dev      Returns royalty amount and recipient for `tokenId` and `salePrice`.
     *  @param tokenId          The tokenID of the NFT for which to query royalty info.
     *  @param salePrice        Sale price of the token.
     *
     *  @return receiver        Address of royalty recipient account.
     *  @return royaltyAmount   Royalty amount calculated at current royaltyBps value.
     */
    function royaltyInfo(
        uint256 tokenId,
        uint256 salePrice
    ) external view virtual override returns (address receiver, uint256 royaltyAmount) {
        (address recipient, uint256 bps) = getRoyaltyInfoForToken(tokenId);
        receiver = recipient;
        royaltyAmount = (salePrice * bps) / 10_000;
    }

    /**
     *  @notice          View royalty info for a given token.
     *  @dev             Returns royalty recipient and bps for `_tokenId`.
     *  @param _tokenId  The tokenID of the NFT for which to query royalty info.
     */
    function getRoyaltyInfoForToken(uint256 _tokenId) public view override returns (address, uint16) {
        RoyaltyInfo memory royaltyForToken = royaltyInfoForToken[_tokenId];

        return
            royaltyForToken.recipient == address(0)
                ? (royaltyRecipient, uint16(royaltyBps))
                : (royaltyForToken.recipient, uint16(royaltyForToken.bps));
    }

    /**
     *  @notice Returns the defualt royalty recipient and BPS for this contract's NFTs.
     */
    function getDefaultRoyaltyInfo() external view override returns (address, uint16) {
        return (royaltyRecipient, uint16(royaltyBps));
    }

    /**
     *  @notice         Updates default royalty recipient and bps.
     *  @dev            Caller should be authorized to set royalty info.
     *                  See {_canSetRoyaltyInfo}.
     *                  Emits {DefaultRoyalty Event}; See {_setupDefaultRoyaltyInfo}.
     *
     *  @param _royaltyRecipient   Address to be set as default royalty recipient.
     *  @param _royaltyBps         Updated royalty bps.
     */
    function setDefaultRoyaltyInfo(address _royaltyRecipient, uint256 _royaltyBps) external override {
        if (!_canSetRoyaltyInfo()) {
            revert RoyaltyUnauthorized();
        }

        _setupDefaultRoyaltyInfo(_royaltyRecipient, _royaltyBps);
    }

    /// @dev Lets a contract admin update the default royalty recipient and bps.
    function _setupDefaultRoyaltyInfo(address _royaltyRecipient, uint256 _royaltyBps) internal {
        if (_royaltyBps > 10_000) {
            revert RoyaltyExceededMaxFeeBps(10_000, _royaltyBps);
        }

        royaltyRecipient = _royaltyRecipient;
        royaltyBps = uint16(_royaltyBps);

        emit DefaultRoyalty(_royaltyRecipient, _royaltyBps);
    }

    /**
     *  @notice         Updates default royalty recipient and bps for a particular token.
     *  @dev            Sets royalty info for `_tokenId`. Caller should be authorized to set royalty info.
     *                  See {_canSetRoyaltyInfo}.
     *                  Emits {RoyaltyForToken Event}; See {_setupRoyaltyInfoForToken}.
     *
     *  @param _recipient   Address to be set as royalty recipient for given token Id.
     *  @param _bps         Updated royalty bps for the token Id.
     */
    function setRoyaltyInfoForToken(uint256 _tokenId, address _recipient, uint256 _bps) external override {
        if (!_canSetRoyaltyInfo()) {
            revert RoyaltyUnauthorized();
        }

        _setupRoyaltyInfoForToken(_tokenId, _recipient, _bps);
    }

    /// @dev Lets a contract admin set the royalty recipient and bps for a particular token Id.
    function _setupRoyaltyInfoForToken(uint256 _tokenId, address _recipient, uint256 _bps) internal {
        if (_bps > 10_000) {
            revert RoyaltyExceededMaxFeeBps(10_000, _bps);
        }

        royaltyInfoForToken[_tokenId] = RoyaltyInfo({ recipient: _recipient, bps: _bps });

        emit RoyaltyForToken(_tokenId, _recipient, _bps);
    }

    /// @dev Returns whether royalty info can be set in the given execution context.
    function _canSetRoyaltyInfo() internal view virtual returns (bool);
}

File 21 of 36 : IClaimCondition.sol
// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 *  The interface `IClaimCondition` is written for thirdweb's 'Drop' contracts, which are distribution mechanisms for tokens.
 *
 *  A claim condition defines criteria under which accounts can mint tokens. Claim conditions can be overwritten
 *  or added to by the contract admin. At any moment, there is only one active claim condition.
 */

interface IClaimCondition {
    /**
     *  @notice The criteria that make up a claim condition.
     *
     *  @param startTimestamp                 The unix timestamp after which the claim condition applies.
     *                                        The same claim condition applies until the `startTimestamp`
     *                                        of the next claim condition.
     *
     *  @param maxClaimableSupply             The maximum total number of tokens that can be claimed under
     *                                        the claim condition.
     *
     *  @param supplyClaimed                  At any given point, the number of tokens that have been claimed
     *                                        under the claim condition.
     *
     *  @param quantityLimitPerWallet         The maximum number of tokens that can be claimed by a wallet.
     *
     *  @param merkleRoot                     The allowlist of addresses that can claim tokens under the claim
     *                                        condition.
     *
     *  @param pricePerToken                  The price required to pay per token claimed.
     *
     *  @param currency                       The currency in which the `pricePerToken` must be paid.
     *
     *  @param metadata                       Claim condition metadata.
     */
    struct ClaimCondition {
        uint256 startTimestamp;
        uint256 maxClaimableSupply;
        uint256 supplyClaimed;
        uint256 quantityLimitPerWallet;
        bytes32 merkleRoot;
        uint256 pricePerToken;
        address currency;
        string metadata;
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 *  Thirdweb's `ContractMetadata` is a contract extension for any base contracts. It lets you set a metadata URI
 *  for you contract.
 *
 *  Additionally, `ContractMetadata` is necessary for NFT contracts that want royalties to get distributed on OpenSea.
 */

interface IContractMetadata {
    /// @dev Returns the metadata URI of the contract.
    function contractURI() external view returns (string memory);

    /**
     *  @dev Sets contract URI for the storefront-level metadata of the contract.
     *       Only module admin can call this function.
     */
    function setContractURI(string calldata _uri) external;

    /// @dev Emitted when the contract URI is updated.
    event ContractURIUpdated(string prevURI, string newURI);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 *  Thirdweb's `DelayedReveal` is a contract extension for base NFT contracts. It lets you create batches of
 *  'delayed-reveal' NFTs. You can learn more about the usage of delayed reveal NFTs here - https://blog.thirdweb.com/delayed-reveal-nfts
 */

interface IDelayedReveal {
    /// @dev Emitted when tokens are revealed.
    event TokenURIRevealed(uint256 indexed index, string revealedURI);

    /**
     *  @notice Reveals a batch of delayed reveal NFTs.
     *
     *  @param identifier The ID for the batch of delayed-reveal NFTs to reveal.
     *
     *  @param key        The key with which the base URI for the relevant batch of NFTs was encrypted.
     */
    function reveal(uint256 identifier, bytes calldata key) external returns (string memory revealedURI);

    /**
     *  @notice Performs XOR encryption/decryption.
     *
     *  @param data The data to encrypt. In the case of delayed-reveal NFTs, this is the "revealed" state
     *              base URI of the relevant batch of NFTs.
     *
     *  @param key  The key with which to encrypt data
     */
    function encryptDecrypt(bytes memory data, bytes calldata key) external pure returns (bytes memory result);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "./IClaimCondition.sol";

/**
 *  The interface `IDropSinglePhase` is written for thirdweb's 'DropSinglePhase' contracts, which are distribution mechanisms for tokens.
 *
 *  An authorized wallet can set a claim condition for the distribution of the contract's tokens.
 *  A claim condition defines criteria under which accounts can mint tokens. Claim conditions can be overwritten
 *  or added to by the contract admin. At any moment, there is only one active claim condition.
 */

interface IDropSinglePhase is IClaimCondition {
    /**
     *  @param proof Proof of concerned wallet's inclusion in an allowlist.
     *  @param quantityLimitPerWallet The total quantity of tokens the allowlisted wallet is eligible to claim over time.
     *  @param pricePerToken The price per token the allowlisted wallet must pay to claim tokens.
     *  @param currency The currency in which the allowlisted wallet must pay the price for claiming tokens.
     */
    struct AllowlistProof {
        bytes32[] proof;
        uint256 quantityLimitPerWallet;
        uint256 pricePerToken;
        address currency;
    }

    /// @notice Emitted when tokens are claimed via `claim`.
    event TokensClaimed(
        address indexed claimer,
        address indexed receiver,
        uint256 indexed startTokenId,
        uint256 quantityClaimed
    );

    /// @notice Emitted when the contract's claim conditions are updated.
    event ClaimConditionUpdated(ClaimCondition condition, bool resetEligibility);

    /**
     *  @notice Lets an account claim a given quantity of NFTs.
     *
     *  @param receiver                       The receiver of the NFTs to claim.
     *  @param quantity                       The quantity of NFTs to claim.
     *  @param currency                       The currency in which to pay for the claim.
     *  @param pricePerToken                  The price per token to pay for the claim.
     *  @param allowlistProof                 The proof of the claimer's inclusion in the merkle root allowlist
     *                                        of the claim conditions that apply.
     *  @param data                           Arbitrary bytes data that can be leveraged in the implementation of this interface.
     */
    function claim(
        address receiver,
        uint256 quantity,
        address currency,
        uint256 pricePerToken,
        AllowlistProof calldata allowlistProof,
        bytes memory data
    ) external payable;

    /**
     *  @notice Lets a contract admin (account with `DEFAULT_ADMIN_ROLE`) set claim conditions.
     *
     *  @param phase                    Claim condition to set.
     *
     *  @param resetClaimEligibility    Whether to honor the restrictions applied to wallets who have claimed tokens in the current conditions,
     *                                  in the new claim conditions being set.
     */
    function setClaimConditions(ClaimCondition calldata phase, bool resetClaimEligibility) external;
}

File 25 of 36 : ILazyMint.sol
// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 *  Thirdweb's `LazyMint` is a contract extension for any base NFT contract. It lets you 'lazy mint' any number of NFTs
 *  at once. Here, 'lazy mint' means defining the metadata for particular tokenIds of your NFT contract, without actually
 *  minting a non-zero balance of NFTs of those tokenIds.
 */

interface ILazyMint {
    /// @dev Emitted when tokens are lazy minted.
    event TokensLazyMinted(uint256 indexed startTokenId, uint256 endTokenId, string baseURI, bytes encryptedBaseURI);

    /**
     *  @notice Lazy mints a given amount of NFTs.
     *
     *  @param amount           The number of NFTs to lazy mint.
     *
     *  @param baseURIForTokens The base URI for the 'n' number of NFTs being lazy minted, where the metadata for each
     *                          of those NFTs is `${baseURIForTokens}/${tokenId}`.
     *
     *  @param extraData        Additional bytes data to be used at the discretion of the consumer of the contract.
     *
     *  @return batchId         A unique integer identifier for the batch of NFTs lazy minted together.
     */
    function lazyMint(
        uint256 amount,
        string calldata baseURIForTokens,
        bytes calldata extraData
    ) external returns (uint256 batchId);
}

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

/// @author thirdweb

/**
 * @dev Provides a function to batch together multiple calls in a single external call.
 *
 * _Available since v4.1._
 */
interface IMulticall {
    /**
     * @dev Receives and executes a batch of function calls on this contract.
     */
    function multicall(bytes[] calldata data) external returns (bytes[] memory results);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 *  Thirdweb's `Ownable` is a contract extension to be used with any base contract. It exposes functions for setting and reading
 *  who the 'owner' of the inheriting smart contract is, and lets the inheriting contract perform conditional logic that uses
 *  information about who the contract's owner is.
 */

interface IOwnable {
    /// @dev Returns the owner of the contract.
    function owner() external view returns (address);

    /// @dev Lets a module admin set a new owner for the contract. The new owner must be a module admin.
    function setOwner(address _newOwner) external;

    /// @dev Emitted when a new Owner is set.
    event OwnerUpdated(address indexed prevOwner, address indexed newOwner);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 *  Thirdweb's `Primary` is a contract extension to be used with any base contract. It exposes functions for setting and reading
 *  the recipient of primary sales, and lets the inheriting contract perform conditional logic that uses information about
 *  primary sales, if desired.
 */

interface IPrimarySale {
    /// @dev The adress that receives all primary sales value.
    function primarySaleRecipient() external view returns (address);

    /// @dev Lets a module admin set the default recipient of all primary sales.
    function setPrimarySaleRecipient(address _saleRecipient) external;

    /// @dev Emitted when a new sale recipient is set.
    event PrimarySaleRecipientUpdated(address indexed recipient);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

import "../../eip/interface/IERC2981.sol";

/**
 *  Thirdweb's `Royalty` is a contract extension to be used with any base contract. It exposes functions for setting and reading
 *  the recipient of royalty fee and the royalty fee basis points, and lets the inheriting contract perform conditional logic
 *  that uses information about royalty fees, if desired.
 *
 *  The `Royalty` contract is ERC2981 compliant.
 */

interface IRoyalty is IERC2981 {
    struct RoyaltyInfo {
        address recipient;
        uint256 bps;
    }

    /// @dev Returns the royalty recipient and fee bps.
    function getDefaultRoyaltyInfo() external view returns (address, uint16);

    /// @dev Lets a module admin update the royalty bps and recipient.
    function setDefaultRoyaltyInfo(address _royaltyRecipient, uint256 _royaltyBps) external;

    /// @dev Lets a module admin set the royalty recipient for a particular token Id.
    function setRoyaltyInfoForToken(uint256 tokenId, address recipient, uint256 bps) external;

    /// @dev Returns the royalty recipient for a particular token Id.
    function getRoyaltyInfoForToken(uint256 tokenId) external view returns (address, uint16);

    /// @dev Emitted when royalty info is updated.
    event DefaultRoyalty(address indexed newRoyaltyRecipient, uint256 newRoyaltyBps);

    /// @dev Emitted when royalty recipient for tokenId is set
    event RoyaltyForToken(uint256 indexed tokenId, address indexed royaltyRecipient, uint256 royaltyBps);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../../../../../eip/interface/IERC20.sol";
import { Address } from "../../../../../lib/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

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

pragma solidity ^0.8.0;

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

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

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

interface IWETH {
    function deposit() external payable;

    function withdraw(uint256 amount) external;

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

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.1;

/// @author thirdweb, OpenZeppelin Contracts (v4.9.0)

/**
 * @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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [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://consensys.net/diligence/blog/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/v0.8.0/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);
        }
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

// Helper interfaces
import { IWETH } from "../infra/interface/IWETH.sol";
import { SafeERC20, IERC20 } from "../external-deps/openzeppelin/token/ERC20/utils/SafeERC20.sol";

library CurrencyTransferLib {
    using SafeERC20 for IERC20;

    error CurrencyTransferLibMismatchedValue(uint256 expected, uint256 actual);
    error CurrencyTransferLibFailedNativeTransfer(address recipient, uint256 value);

    /// @dev The address interpreted as native token of the chain.
    address public constant NATIVE_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    /// @dev Transfers a given amount of currency.
    function transferCurrency(address _currency, address _from, address _to, uint256 _amount) internal {
        if (_amount == 0) {
            return;
        }

        if (_currency == NATIVE_TOKEN) {
            safeTransferNativeToken(_to, _amount);
        } else {
            safeTransferERC20(_currency, _from, _to, _amount);
        }
    }

    /// @dev Transfers a given amount of currency. (With native token wrapping)
    function transferCurrencyWithWrapper(
        address _currency,
        address _from,
        address _to,
        uint256 _amount,
        address _nativeTokenWrapper
    ) internal {
        if (_amount == 0) {
            return;
        }

        if (_currency == NATIVE_TOKEN) {
            if (_from == address(this)) {
                // withdraw from weth then transfer withdrawn native token to recipient
                IWETH(_nativeTokenWrapper).withdraw(_amount);
                safeTransferNativeTokenWithWrapper(_to, _amount, _nativeTokenWrapper);
            } else if (_to == address(this)) {
                // store native currency in weth
                if (_amount != msg.value) {
                    revert CurrencyTransferLibMismatchedValue(msg.value, _amount);
                }
                IWETH(_nativeTokenWrapper).deposit{ value: _amount }();
            } else {
                safeTransferNativeTokenWithWrapper(_to, _amount, _nativeTokenWrapper);
            }
        } else {
            safeTransferERC20(_currency, _from, _to, _amount);
        }
    }

    /// @dev Transfer `amount` of ERC20 token from `from` to `to`.
    function safeTransferERC20(address _currency, address _from, address _to, uint256 _amount) internal {
        if (_from == _to) {
            return;
        }

        if (_from == address(this)) {
            IERC20(_currency).safeTransfer(_to, _amount);
        } else {
            IERC20(_currency).safeTransferFrom(_from, _to, _amount);
        }
    }

    /// @dev Transfers `amount` of native token to `to`.
    function safeTransferNativeToken(address to, uint256 value) internal {
        // solhint-disable avoid-low-level-calls
        // slither-disable-next-line low-level-calls
        (bool success, ) = to.call{ value: value }("");
        if (!success) {
            revert CurrencyTransferLibFailedNativeTransfer(to, value);
        }
    }

    /// @dev Transfers `amount` of native token to `to`. (With native token wrapping)
    function safeTransferNativeTokenWithWrapper(address to, uint256 value, address _nativeTokenWrapper) internal {
        // solhint-disable avoid-low-level-calls
        // slither-disable-next-line low-level-calls
        (bool success, ) = to.call{ value: value }("");
        if (!success) {
            IWETH(_nativeTokenWrapper).deposit{ value: value }();
            IERC20(_nativeTokenWrapper).safeTransfer(to, value);
        }
    }
}

// SPDX-License-Identifier: Apache 2.0
pragma solidity ^0.8.0;

/// @author OpenZeppelin, thirdweb

library MerkleProof {
    function verify(bytes32[] calldata proof, bytes32 root, bytes32 leaf) internal pure returns (bool, uint256) {
        bytes32 computedHash = leaf;
        uint256 index = 0;

        for (uint256 i = 0; i < proof.length; i++) {
            index *= 2;
            bytes32 proofElement = proof[i];

            if (computedHash <= proofElement) {
                // Hash(current computed hash + current element of the proof)
                computedHash = _efficientHash(computedHash, proofElement);
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = _efficientHash(proofElement, computedHash);
                index += 1;
            }
        }

        // Check if the computed hash (root) is equal to the provided root
        return (computedHash == root, index);
    }

    /**
     * @dev Implementation of keccak256(abi.encode(a, b)) that doesn't allocate or expand memory.
     */
    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @author thirdweb

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /// @dev Returns the hexadecimal representation of `value`.
    /// The output is prefixed with "0x", encoded using 2 hexadecimal digits per byte,
    /// and the alphabets are capitalized conditionally according to
    /// https://eips.ethereum.org/EIPS/eip-55
    function toHexStringChecksummed(address value) internal pure returns (string memory str) {
        str = toHexString(value);
        /// @solidity memory-safe-assembly
        assembly {
            let mask := shl(6, div(not(0), 255)) // `0b010000000100000000 ...`
            let o := add(str, 0x22)
            let hashed := and(keccak256(o, 40), mul(34, mask)) // `0b10001000 ... `
            let t := shl(240, 136) // `0b10001000 << 240`
            for {
                let i := 0
            } 1 {

            } {
                mstore(add(i, i), mul(t, byte(i, hashed)))
                i := add(i, 1)
                if eq(i, 20) {
                    break
                }
            }
            mstore(o, xor(mload(o), shr(1, and(mload(0x00), and(mload(o), mask)))))
            o := add(o, 0x20)
            mstore(o, xor(mload(o), shr(1, and(mload(0x20), and(mload(o), mask)))))
        }
    }

    /// @dev Returns the hexadecimal representation of `value`.
    /// The output is prefixed with "0x" and encoded using 2 hexadecimal digits per byte.
    function toHexString(address value) internal pure returns (string memory str) {
        str = toHexStringNoPrefix(value);
        /// @solidity memory-safe-assembly
        assembly {
            let strLength := add(mload(str), 2) // Compute the length.
            mstore(str, 0x3078) // Write the "0x" prefix.
            str := sub(str, 2) // Move the pointer.
            mstore(str, strLength) // Write the length.
        }
    }

    /// @dev Returns the hexadecimal representation of `value`.
    /// The output is encoded using 2 hexadecimal digits per byte.
    function toHexStringNoPrefix(address value) internal pure returns (string memory str) {
        /// @solidity memory-safe-assembly
        assembly {
            str := mload(0x40)

            // Allocate the memory.
            // We need 0x20 bytes for the trailing zeros padding, 0x20 bytes for the length,
            // 0x02 bytes for the prefix, and 0x28 bytes for the digits.
            // The next multiple of 0x20 above (0x20 + 0x20 + 0x02 + 0x28) is 0x80.
            mstore(0x40, add(str, 0x80))

            // Store "0123456789abcdef" in scratch space.
            mstore(0x0f, 0x30313233343536373839616263646566)

            str := add(str, 2)
            mstore(str, 40)

            let o := add(str, 0x20)
            mstore(add(o, 40), 0)

            value := shl(96, value)

            // We write the string from rightmost digit to leftmost digit.
            // The following is essentially a do-while loop that also handles the zero case.
            for {
                let i := 0
            } 1 {

            } {
                let p := add(o, add(i, i))
                let temp := byte(i, value)
                mstore8(add(p, 1), mload(and(temp, 15)))
                mstore8(p, mload(shr(4, temp)))
                i := add(i, 1)
                if eq(i, 20) {
                    break
                }
            }
        }
    }

    /// @dev Returns the hex encoded string from the raw bytes.
    /// The output is encoded using 2 hexadecimal digits per byte.
    function toHexString(bytes memory raw) internal pure returns (string memory str) {
        str = toHexStringNoPrefix(raw);
        /// @solidity memory-safe-assembly
        assembly {
            let strLength := add(mload(str), 2) // Compute the length.
            mstore(str, 0x3078) // Write the "0x" prefix.
            str := sub(str, 2) // Move the pointer.
            mstore(str, strLength) // Write the length.
        }
    }

    /// @dev Returns the hex encoded string from the raw bytes.
    /// The output is encoded using 2 hexadecimal digits per byte.
    function toHexStringNoPrefix(bytes memory raw) internal pure returns (string memory str) {
        /// @solidity memory-safe-assembly
        assembly {
            let length := mload(raw)
            str := add(mload(0x40), 2) // Skip 2 bytes for the optional prefix.
            mstore(str, add(length, length)) // Store the length of the output.

            // Store "0123456789abcdef" in scratch space.
            mstore(0x0f, 0x30313233343536373839616263646566)

            let o := add(str, 0x20)
            let end := add(raw, length)

            for {

            } iszero(eq(raw, end)) {

            } {
                raw := add(raw, 1)
                mstore8(add(o, 1), mload(and(mload(raw), 15)))
                mstore8(o, mload(and(shr(4, mload(raw)), 15)))
                o := add(o, 2)
            }
            mstore(o, 0) // Zeroize the slot after the string.
            mstore(0x40, add(o, 0x20)) // Allocate the memory.
        }
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "london",
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

API
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internalType":"uint256","name":"supplyClaimed","type":"uint256"},{"internalType":"uint256","name":"quantityLimitPerWallet","type":"uint256"},{"internalType":"bytes32","name":"merkleRoot","type":"bytes32"},{"internalType":"uint256","name":"pricePerToken","type":"uint256"},{"internalType":"address","name":"currency","type":"address"},{"internalType":"string","name":"metadata","type":"string"}],"indexed":false,"internalType":"struct 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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

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

-----Decoded View---------------
Arg [0] : _defaultAdmin (address): 0x321e891A260665C51b3B00102F8c3371D0027DF5
Arg [1] : _name (string): FacesOfWeb
Arg [2] : _symbol (string): FOW
Arg [3] : _royaltyRecipient (address): 0x321e891A260665C51b3B00102F8c3371D0027DF5
Arg [4] : _royaltyBps (uint128): 500
Arg [5] : _primarySaleRecipient (address): 0x321e891A260665C51b3B00102F8c3371D0027DF5

-----Encoded View---------------
10 Constructor Arguments found :
Arg [0] : 000000000000000000000000321e891a260665c51b3b00102f8c3371d0027df5
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000100
Arg [3] : 000000000000000000000000321e891a260665c51b3b00102f8c3371d0027df5
Arg [4] : 00000000000000000000000000000000000000000000000000000000000001f4
Arg [5] : 000000000000000000000000321e891a260665c51b3b00102f8c3371d0027df5
Arg [6] : 000000000000000000000000000000000000000000000000000000000000000a
Arg [7] : 46616365734f6657656200000000000000000000000000000000000000000000
Arg [8] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [9] : 464f570000000000000000000000000000000000000000000000000000000000


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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.