ETH Price: $3,304.48 (-3.15%)
Gas: 17 Gwei

Contract

0x78fD3FA3cE045f59eb8C4DC7C21906295a8e3Ab4
 

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$0.00

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From
To
Value
Safe Transfer Fr...202135902024-07-01 18:54:2344 hrs ago1719860063IN
Rich Baby: BABY Token
0 ETH0.0006990110.85385617
Set Approval For...202015852024-06-30 2:41:593 days ago1719715319IN
Rich Baby: BABY Token
0 ETH0.000099792.15904138
Set Approval For...201799082024-06-27 2:02:236 days ago1719453743IN
Rich Baby: BABY Token
0 ETH0.000201984.37660587
Set Approval For...201793372024-06-27 0:07:356 days ago1719446855IN
Rich Baby: BABY Token
0 ETH0.000169793.67906418
Set Approval For...201049062024-06-16 14:18:5917 days ago1718547539IN
Rich Baby: BABY Token
0 ETH0.000102074.19680069
Set Approval For...200964452024-06-15 9:57:5918 days ago1718445479IN
Rich Baby: BABY Token
0 ETH0.00017433.76997059
Set Approval For...200880122024-06-14 5:39:3519 days ago1718343575IN
Rich Baby: BABY Token
0 ETH0.000376298.15359883
Set Approval For...200661292024-06-11 4:13:4722 days ago1718079227IN
Rich Baby: BABY Token
0 ETH0.000333477.21270899
Set Approval For...200372252024-06-07 3:20:5926 days ago1717730459IN
Rich Baby: BABY Token
0 ETH0.000362527.84086557
Set Approval For...200165632024-06-04 6:07:2329 days ago1717481243IN
Rich Baby: BABY Token
0 ETH0.000150946.22120416
Set Approval For...200132152024-06-03 18:54:4729 days ago1717440887IN
Rich Baby: BABY Token
0 ETH0.0005651412.24549099
Safe Transfer Fr...198556452024-05-12 18:11:5951 days ago1715537519IN
Rich Baby: BABY Token
0 ETH0.000192673.69812492
Safe Transfer Fr...198556402024-05-12 18:10:5951 days ago1715537459IN
Rich Baby: BABY Token
0 ETH0.000194823.73921503
Safe Transfer Fr...198555802024-05-12 17:58:5951 days ago1715536739IN
Rich Baby: BABY Token
0 ETH0.000201114.25170304
Safe Transfer Fr...198555642024-05-12 17:55:4751 days ago1715536547IN
Rich Baby: BABY Token
0 ETH0.000226044.78
Safe Transfer Fr...198555532024-05-12 17:53:3551 days ago1715536415IN
Rich Baby: BABY Token
0 ETH0.000206123.95616282
Set Approval For...198394802024-05-10 11:57:2354 days ago1715342243IN
Rich Baby: BABY Token
0 ETH0.000192314.16699206
Set Approval For...198394792024-05-10 11:57:1154 days ago1715342231IN
Rich Baby: BABY Token
0 ETH0.000188834.08434215
Set Approval For...198390902024-05-10 10:38:4754 days ago1715337527IN
Rich Baby: BABY Token
0 ETH0.00023515.09434403
Safe Transfer Fr...198387722024-05-10 9:34:4754 days ago1715333687IN
Rich Baby: BABY Token
0 ETH0.000280564.35645953
Set Approval For...198369392024-05-10 3:25:1154 days ago1715311511IN
Rich Baby: BABY Token
0 ETH0.000083793.45696843
Set Approval For...198253202024-05-08 12:23:4756 days ago1715171027IN
Rich Baby: BABY Token
0 ETH0.000256675.55143826
Set Approval For...198252172024-05-08 12:03:1156 days ago1715169791IN
Rich Baby: BABY Token
0 ETH0.000256795.56430154
Safe Transfer Fr...198227862024-05-08 3:53:1156 days ago1715140391IN
Rich Baby: BABY Token
0 ETH0.000303034.70158617
Set Approval For...198115082024-05-06 14:01:5958 days ago1715004119IN
Rich Baby: BABY Token
0 ETH0.000402768.7271593
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Latest 25 internal transactions (View All)

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150054932022-06-22 2:55:22742 days ago1655866522
Rich Baby: BABY Token
197.28 ETH
148600612022-05-28 11:39:49767 days ago1653737989
Rich Baby: BABY Token
0.12 ETH
148599642022-05-28 11:13:40767 days ago1653736420
Rich Baby: BABY Token
0.12 ETH
148599462022-05-28 11:08:17767 days ago1653736097
Rich Baby: BABY Token
0.12 ETH
148598762022-05-28 10:51:39767 days ago1653735099
Rich Baby: BABY Token
0.12 ETH
148595242022-05-28 9:36:54767 days ago1653730614
Rich Baby: BABY Token
0.12 ETH
148594352022-05-28 9:12:54767 days ago1653729174
Rich Baby: BABY Token
0.12 ETH
148593602022-05-28 8:54:50767 days ago1653728090
Rich Baby: BABY Token
0.12 ETH
148593602022-05-28 8:54:50767 days ago1653728090
Rich Baby: BABY Token
0.12 ETH
148593332022-05-28 8:48:42767 days ago1653727722
Rich Baby: BABY Token
0.12 ETH
148591852022-05-28 8:13:09767 days ago1653725589
Rich Baby: BABY Token
0.12 ETH
148591562022-05-28 8:06:08767 days ago1653725168
Rich Baby: BABY Token
0.12 ETH
148591312022-05-28 7:59:41767 days ago1653724781
Rich Baby: BABY Token
0.12 ETH
148591282022-05-28 7:59:21767 days ago1653724761
Rich Baby: BABY Token
0.12 ETH
148591212022-05-28 7:57:51767 days ago1653724671
Rich Baby: BABY Token
0.12 ETH
148588562022-05-28 7:00:12767 days ago1653721212
Rich Baby: BABY Token
0.12 ETH
148588092022-05-28 6:48:14767 days ago1653720494
Rich Baby: BABY Token
0.12 ETH
148588082022-05-28 6:47:43767 days ago1653720463
Rich Baby: BABY Token
0.12 ETH
148587962022-05-28 6:46:02767 days ago1653720362
Rich Baby: BABY Token
0.12 ETH
148587952022-05-28 6:45:38767 days ago1653720338
Rich Baby: BABY Token
0.12 ETH
148587622022-05-28 6:39:49767 days ago1653719989
Rich Baby: BABY Token
0.12 ETH
148587582022-05-28 6:38:54767 days ago1653719934
Rich Baby: BABY Token
0.12 ETH
148587482022-05-28 6:35:49767 days ago1653719749
Rich Baby: BABY Token
0.12 ETH
148587462022-05-28 6:35:36767 days ago1653719736
Rich Baby: BABY Token
0.12 ETH
148587442022-05-28 6:35:03767 days ago1653719703
Rich Baby: BABY Token
0.12 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
RichBaby

Compiler Version
v0.8.7+commit.e28d00a7

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 20 : RichBaby.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import '@openzeppelin/contracts/access/Ownable.sol';
import '@openzeppelin/contracts/utils/cryptography/ECDSA.sol';
import '@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol';
import '@openzeppelin/contracts/utils/Strings.sol';
import '@openzeppelin/contracts/utils/structs/BitMaps.sol';
import 'erc721a/contracts/ERC721A.sol';

import './CryptoPunksInterface.sol';
import './ERC721ARefundable.sol';

/**
 *                      :---=====---:.
 *                .-===:..        .:-==-:
 *              ===:.   ...........    .-==.
 *           .=+:.  ..:-===-----===-::.   .=+:
 *          =+:. ..:==-:           .-=+-:.  .=+
 *         *=:..::+=.                  =*-:. .:*.  .::::-------=.
 *        *-:..:=+                       =+:. .:*=:....:::::::.:=*-
 *       *=:..:+-                         :*-: .:*:::::::::::::....
 *      -+::::==                           :*-. :-*:::...........    :
 *      #-::::*                           :-*=: .:*                ..*
 *      *-...:+                          -: -*-..:+.               =-*
 *         .::+                      :--==--+*-.::+:..............+-:*
 *        .:::*                   .==-       -==::*.          ...==-+:
 *        -:::+:                 =+::::......:.:+-*..::::::::::-*=-+:
 *       -.-:::*.               =+:::::::::::::::#=:::::::::::=+-=+
 *       :*--:::+-              #-:::::::::::::::=+:::::::::-+=-+-
 *        :*=-:::-+:            #--::::::::::::::=+:::::::-+=-+=
 *          *=--:::-+=.         ++---++=++::::::-#::::::-++-=+.
 *           -*=--::::-==------++*++=::::-#:::-=#=:::::+=-=+=-:. ....
 *             -++=--::::::::::::::::::--+*-=+**-::::=+--+-    .:...:----:
 *                -=++=-----::::-----=+***+++=--::::+-:=+                .-=
 *                   .--=++++++++++++=-------::::::+-:+-                    =-
 *                      -: .::::::::..:......::...*=-*:                      :=
 *                    .= ..              ....    +=-*:                        =:
 *                   .-                         +--#-                          *
 *                   =                        .*-=+.-+:                        *
 *                  -:            .........::-+-=+    *.                      .+
 *                  ::..::::::::::::::::::::++-+=     :+                      *
 *                   + .::::::::::::::::::=+-=+:       -+.                   +.
 *                    #-..::::::::::::-===::+-          :+-                -=
 *                     =*============+=-=+=:              :==:          :-=.
 *                       -=+==-----=++=-:                    .----------
 */
contract RichBaby is ERC721ARefundable, EIP712, Ownable {
    using ECDSA for bytes32;
    using BitMaps for BitMaps.BitMap;
    using Strings for uint256;

    uint256 public immutable collectionSize;
    uint256 public constant DEV_MINT_MAX = 250;
    uint256 public constant MINT_MAX_PER_PHASE = 2;
    uint256 public devMinted;

    string public baseURI;
    address private signerAddress;

    bytes32 public PROVENANCE;

    CryptoPunksInterface private immutable punksContract;
    IERC721 private immutable baycContract;

    BitMaps.BitMap private bred;

    enum SalePhase {
        Paused,
        Breed,
        AllowList,
        Public
    }

    struct SaleConfig {
        uint64 startTimestamp;
        uint64 price;
        SalePhase phase;
    }

    mapping(SalePhase => mapping(address => uint256)) public mintedCount;

    SaleConfig public saleConfig;

    struct RefundableMintInfo {
        address mintAddress;
        uint64 mintTime;
        uint16 mintQuantity;
    }
    mapping(uint256 => RefundableMintInfo) private refundableMintInfos;

    struct Parents {
        uint16 punkTokenId;
        uint16 baycTokenId;
        bool isProposerPunk;
        bool proposerClaimed;
        bool hasParents;
    }
    mapping(uint256 => Parents) public babyParents;

    event Breed(
        uint16 indexed _proposerTokenId,
        bool indexed _isProposerPunk,
        uint16 indexed _acceptorTokenId,
        address _acceptor,
        uint16 _babyTokenId
    );

    event Claim(
        uint16 indexed _babyTokenId,
        uint16 indexed _siblingTokenId,
        address indexed _claimer
    );

    constructor(
        address punkAddress,
        address baycAddress,
        address _signerAddress,
        uint16 _collectionSize,
        uint64 _refundPeriod
    )
        ERC721ARefundable(_refundPeriod)
        ERC721A('Rich Baby', 'BABY')
        EIP712('Rich Baby', '1')
    {
        punksContract = CryptoPunksInterface(punkAddress);
        baycContract = IERC721(baycAddress);
        signerAddress = _signerAddress;
        collectionSize = _collectionSize;
    }

    function setSignerAddress(address newSignerAddress) external onlyOwner {
        signerAddress = newSignerAddress;
    }

    modifier isAtSalePhase(SalePhase phase) {
        unchecked {
            require(
                saleConfig.phase == phase &&
                    block.timestamp >= saleConfig.startTimestamp,
                'Sale phase mismatch.'
            );
        }
        _;
    }

    function checkAndUpdateMintedCount(SalePhase phase, uint256 quantity)
        private
    {
        unchecked {
            require(
                mintedCount[phase][msg.sender] + quantity <= MINT_MAX_PER_PHASE,
                'Too many babies to adopt.'
            );

            mintedCount[phase][msg.sender] += quantity;
        }
    }

    modifier checkPrice(SalePhase phase, uint256 quantity) {
        unchecked {
            require(
                msg.value == quantity * saleConfig.price,
                'Incorrect price.'
            );
        }
        _;
    }

    struct MatingRequest {
        address proposerAddress;
        uint16 proposerTokenId;
        bool isProposerPunk; // proposer is punk or bayc owner
        uint32 expireAt;
    }

    bytes32 private constant MATING_REQUEST_TYPE_HASH =
        keccak256(
            'MatingRequest(address proposerAddress,uint16 proposerTokenId,bool isProposerPunk,uint32 expireAt)'
        );

    function hashRequest(MatingRequest calldata matingRequest)
        private
        view
        returns (bytes32)
    {
        bytes32 digest = _hashTypedDataV4(
            keccak256(
                abi.encode(
                    MATING_REQUEST_TYPE_HASH,
                    matingRequest.proposerAddress,
                    matingRequest.proposerTokenId,
                    matingRequest.isProposerPunk,
                    matingRequest.expireAt
                )
            )
        );
        return digest;
    }

    function validateMatingRequest(
        MatingRequest calldata matingRequest,
        bytes calldata sig
    ) internal view {
        require(
            matingRequest.expireAt >= block.timestamp,
            'Mating request expired.'
        );
        require(
            ECDSA.recover(hashRequest(matingRequest), sig) ==
                matingRequest.proposerAddress,
            'Invalid sigature.'
        );
    }

    function verifyPunkOwnership(uint16 punkId, address holder) internal view {
        require(
            punksContract.punkIndexToAddress(punkId) == holder,
            'Address does not own this token.'
        );
    }

    function verifyBaycOwnership(uint16 baycId, address holder) internal view {
        require(
            baycContract.ownerOf(baycId) == holder,
            'Address does not own this token.'
        );
    }

    modifier callerIsUser() {
        require(tx.origin == msg.sender, 'The caller is another contract.');
        _;
    }

    function punkId2Index(uint16 punkId) internal pure returns (uint16) {
        unchecked {
            return punkId * 2;
        }
    }

    function baycId2Index(uint16 baycId) internal pure returns (uint16) {
        unchecked {
            return baycId * 2 + 1;
        }
    }

    function punkBred(uint16 punkId) public view returns (bool) {
        return bred.get(punkId2Index(punkId));
    }

    function baycBred(uint16 baycId) public view returns (bool) {
        return bred.get(baycId2Index(baycId));
    }

    /* acceptor mint one baby, left another baby for proposer to claim */
    function breed(
        MatingRequest calldata matingRequest,
        uint16 acceptorTokenId,
        bytes calldata sig
    ) external callerIsUser isAtSalePhase(SalePhase.Breed) {
        validateMatingRequest(matingRequest, sig);

        uint16 punkId;
        uint16 baycId;
        address punkOwnerAddress;
        address baycOwnerAddress;

        if (matingRequest.isProposerPunk) {
            punkId = matingRequest.proposerTokenId;
            punkOwnerAddress = matingRequest.proposerAddress;
            baycId = acceptorTokenId;
            baycOwnerAddress = msg.sender;
        } else {
            punkId = acceptorTokenId;
            punkOwnerAddress = msg.sender;
            baycId = matingRequest.proposerTokenId;
            baycOwnerAddress = matingRequest.proposerAddress;
        }

        require(!punkBred(punkId), 'Punk already bred a baby.');
        require(!baycBred(baycId), 'Bayc already bred a baby.');

        bred.set(punkId2Index(punkId));
        bred.set(baycId2Index(baycId));

        // check ownership
        verifyPunkOwnership(punkId, punkOwnerAddress);
        verifyBaycOwnership(baycId, baycOwnerAddress);

        uint16 babyTokenId = uint16(_currentIndex);

        babyParents[babyTokenId] = Parents(
            punkId,
            baycId,
            matingRequest.isProposerPunk,
            false,
            true
        );

        emit Breed(
            matingRequest.proposerTokenId,
            matingRequest.isProposerPunk,
            acceptorTokenId,
            msg.sender,
            babyTokenId
        );

        // mint baby token for acceptor, proposer should claim the twin baby later.
        _mint(msg.sender, 1, '', false);
    }

    /* For proposer to claim the baby. */
    function claimBaby(uint16 siblingId)
        external
        callerIsUser
        isAtSalePhase(SalePhase.Breed)
    {
        Parents storage parentsInfo = babyParents[siblingId];
        require(parentsInfo.hasParents, 'No baby to be claimed.');
        if (parentsInfo.isProposerPunk) {
            verifyPunkOwnership(parentsInfo.punkTokenId, msg.sender);
        } else {
            verifyBaycOwnership(parentsInfo.baycTokenId, msg.sender);
        }
        require(!parentsInfo.proposerClaimed, 'Baby already claimed.');

        parentsInfo.proposerClaimed = true;

        uint16 babyTokenId = uint16(_currentIndex);
        babyParents[babyTokenId] = parentsInfo;

        emit Claim(babyTokenId, siblingId, msg.sender);
        _mint(msg.sender, 1, '', false);
    }

    function allowListAdopt(
        uint256 quantity,
        uint256 salt,
        bytes calldata signature
    )
        external
        payable
        callerIsUser
        isAtSalePhase(SalePhase.AllowList)
        checkPrice(SalePhase.AllowList, quantity)
    {
        checkAndUpdateMintedCount(SalePhase.AllowList, quantity);
        require(
            keccak256(abi.encodePacked('allowlist', msg.sender, salt))
                .toEthSignedMessageHash()
                .recover(signature) == signerAddress,
            'Invalid signature.'
        );
        unchecked {
            require(
                _currentIndex + quantity <= collectionSize,
                'Max supply reached.'
            );
        }

        _mint(msg.sender, quantity, '', false);
    }

    function publicAdopt(
        uint256 quantity,
        uint256 salt,
        bytes calldata signature
    )
        external
        payable
        callerIsUser
        isAtSalePhase(SalePhase.Public)
        checkPrice(SalePhase.Public, quantity)
    {
        checkAndUpdateMintedCount(SalePhase.Public, quantity);
        require(
            keccak256(abi.encodePacked('public', msg.sender, salt))
                .toEthSignedMessageHash()
                .recover(signature) == signerAddress,
            'Invalid signature.'
        );
        unchecked {
            require(
                _currentIndex + quantity <= collectionSize,
                'Max supply reached.'
            );
        }

        _mint(msg.sender, quantity, '', false);
    }

    function startBreedSale(uint64 startTime) external onlyOwner {
        saleConfig = SaleConfig(startTime, 0, SalePhase.Breed);
    }

    function startAllowlistSale(uint64 price, uint64 startTime)
        external
        onlyOwner
    {
        saleConfig = SaleConfig(startTime, price, SalePhase.AllowList);
    }

    function startPublicSale(uint64 price, uint64 startTime)
        external
        onlyOwner
    {
        saleConfig = SaleConfig(startTime, price, SalePhase.Public);
    }

    function setSaleConfig(SaleConfig calldata _saleConfig) external onlyOwner {
        saleConfig = _saleConfig;
    }

    function devMint(address to, uint256 quantity) external onlyOwner {
        require(
            devMinted + quantity <= DEV_MINT_MAX,
            'Too many babies to mint.'
        );
        unchecked {
            devMinted += quantity;
        }
        _mint(to, quantity, '', false);
    }

    function setProvenance(bytes32 provenance) external onlyOwner {
        PROVENANCE = provenance;
    }

    function setBaseURI(string memory newBaseURI) external onlyOwner {
        baseURI = newBaseURI;
    }

    function tokenURI(uint256 tokenId)
        public
        view
        override
        returns (string memory)
    {
        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

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

    function withdraw(address beneficiary)
        external
        onlyOwner
        noWithdrawBeforePossibleRefund
    {
        payable(beneficiary).transfer(address(this).balance);
    }
}

File 2 of 20 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

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

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

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 3 of 20 : ECDSA.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

File 4 of 20 : draft-EIP712.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/cryptography/draft-EIP712.sol)

pragma solidity ^0.8.0;

import "./ECDSA.sol";

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
 * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
 * they need in their contracts using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * _Available since v3.4._
 */
abstract contract EIP712 {
    /* solhint-disable var-name-mixedcase */
    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;
    uint256 private immutable _CACHED_CHAIN_ID;
    address private immutable _CACHED_THIS;

    bytes32 private immutable _HASHED_NAME;
    bytes32 private immutable _HASHED_VERSION;
    bytes32 private immutable _TYPE_HASH;

    /* solhint-enable var-name-mixedcase */

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    constructor(string memory name, string memory version) {
        bytes32 hashedName = keccak256(bytes(name));
        bytes32 hashedVersion = keccak256(bytes(version));
        bytes32 typeHash = keccak256(
            "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
        );
        _HASHED_NAME = hashedName;
        _HASHED_VERSION = hashedVersion;
        _CACHED_CHAIN_ID = block.chainid;
        _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
        _CACHED_THIS = address(this);
        _TYPE_HASH = typeHash;
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) {
            return _CACHED_DOMAIN_SEPARATOR;
        } else {
            return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
        }
    }

    function _buildDomainSeparator(
        bytes32 typeHash,
        bytes32 nameHash,
        bytes32 versionHash
    ) private view returns (bytes32) {
        return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
    }
}

File 5 of 20 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @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);
    }
}

File 6 of 20 : BitMaps.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/structs/BitMaps.sol)
pragma solidity ^0.8.0;

/**
 * @dev Library for managing uint256 to bool mapping in a compact and efficient way, providing the keys are sequential.
 * Largelly inspired by Uniswap's https://github.com/Uniswap/merkle-distributor/blob/master/contracts/MerkleDistributor.sol[merkle-distributor].
 */
library BitMaps {
    struct BitMap {
        mapping(uint256 => uint256) _data;
    }

    /**
     * @dev Returns whether the bit at `index` is set.
     */
    function get(BitMap storage bitmap, uint256 index) internal view returns (bool) {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        return bitmap._data[bucket] & mask != 0;
    }

    /**
     * @dev Sets the bit at `index` to the boolean `value`.
     */
    function setTo(
        BitMap storage bitmap,
        uint256 index,
        bool value
    ) internal {
        if (value) {
            set(bitmap, index);
        } else {
            unset(bitmap, index);
        }
    }

    /**
     * @dev Sets the bit at `index`.
     */
    function set(BitMap storage bitmap, uint256 index) internal {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        bitmap._data[bucket] |= mask;
    }

    /**
     * @dev Unsets the bit at `index`.
     */
    function unset(BitMap storage bitmap, uint256 index) internal {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        bitmap._data[bucket] &= ~mask;
    }
}

File 7 of 20 : ERC721A.sol
// SPDX-License-Identifier: MIT
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import '@openzeppelin/contracts/token/ERC721/IERC721.sol';
import '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol';
import '@openzeppelin/contracts/utils/Address.sol';
import '@openzeppelin/contracts/utils/Context.sol';
import '@openzeppelin/contracts/utils/Strings.sol';
import '@openzeppelin/contracts/utils/introspection/ERC165.sol';

error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintedQueryForZeroAddress();
error BurnedQueryForZeroAddress();
error AuxQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerIndexOutOfBounds();
error OwnerQueryForNonexistentToken();
error TokenIndexOutOfBounds();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error URIQueryForNonexistentToken();

/**
 * @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, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    // 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;
    }

    // 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 See {IERC721Enumerable-totalSupply}.
     * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
     */
    function totalSupply() public view 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, IERC165) 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) {
        if (owner == address(0)) revert MintedQueryForZeroAddress();
        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) {
        if (owner == address(0)) revert BurnedQueryForZeroAddress();
        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) {
        if (owner == address(0)) revert AuxQueryForZeroAddress();
        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 {
        if (owner == address(0)) revert AuxQueryForZeroAddress();
        _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 && 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 override {
        address owner = ERC721A.ownerOf(tokenId);
        if (to == owner) revert ApprovalToCurrentOwner();

        if (_msgSender() != owner && !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 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() && !_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;
    }

    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 {
        _mint(to, quantity, _data, true);
    }

    /**
     * @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,
        bytes memory _data,
        bool safe
    ) 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 (safe && 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 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);

        bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
            isApprovedForAll(prevOwnership.addr, _msgSender()) ||
            getApproved(tokenId) == _msgSender());

        if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();
        if (to == address(0)) revert TransferToZeroAddress();

        _beforeTokenTransfers(from, to, tokenId, 1);

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

        // 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;

            _ownerships[tokenId].addr = to;
            _ownerships[tokenId].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;
            if (_ownerships[nextTokenId].addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId < _currentIndex) {
                    _ownerships[nextTokenId].addr = prevOwnership.addr;
                    _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

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

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

        _beforeTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);

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

        // 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[prevOwnership.addr].balance -= 1;
            _addressData[prevOwnership.addr].numberBurned += 1;

            // Keep track of who burned the token, and the timestamp of burning.
            _ownerships[tokenId].addr = prevOwnership.addr;
            _ownerships[tokenId].startTimestamp = uint64(block.timestamp);
            _ownerships[tokenId].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;
            if (_ownerships[nextTokenId].addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId < _currentIndex) {
                    _ownerships[nextTokenId].addr = prevOwnership.addr;
                    _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(prevOwnership.addr, address(0), tokenId);
        _afterTokenTransfers(prevOwnership.addr, 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 {}
}

File 8 of 20 : CryptoPunksInterface.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.0;

interface CryptoPunksInterface {
    function punkIndexToAddress(uint256 punkIndex)
        external
        view
        returns (address);

    function getPunk(uint256 punkIndex) external;
}

File 9 of 20 : ERC721ARefundable.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import 'erc721a/contracts/ERC721A.sol';

error RefundCallerNotOwner();
error RefundCallerNotInitialOwner();
error RefundExpired();
error WithdrawInRefundPeriod();
error NoRefundableValue();
error InvalidStartTokenId();

/**
 * Refundable ERC721 contract based on Azuki's ERC721A protocol.
 *
 * Assumes mint prices of each token are same in one batch,
 *  and minimal precision of token price are 1 gwei.
 *
 * Assumes max token price less than 2^48-1 = 281474.976710655 ETH.
 *
 * Assumes all ETH transferred are used only for minting in one transaction.
 *
 * Assume max token quantity of once minting no more than 2^8-1 = 255.
 *
 * Tokens become unrefundable after it been transferred.
 */
abstract contract ERC721ARefundable is ERC721A {
    uint256 private immutable refundPeriod;

    uint256 public latestRefundableMintTime;
    struct Refundability {
        uint40 mintTime;
        address mintAddress;
        uint48 value; // value in gwei, max of 281474.976710655 ETH
        uint8 quantity;
    }
    mapping(uint256 => Refundability) internal refundabilities;

    constructor(uint64 _refundPeriod) {
        refundPeriod = _refundPeriod;
        latestRefundableMintTime = block.timestamp;
    }

    function _afterTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal override {
        if (from == address(0) && msg.value > 0) {
            // is mint
            refundabilities[startTokenId] = Refundability(
                uint40(block.timestamp),
                to,
                uint48(msg.value / quantity / 1 gwei),
                uint8(quantity)
            );
            latestRefundableMintTime = block.timestamp;
        }
    }

    function refund(uint256 tokenId) external {
        uint256 curr = tokenId;
        while (true) {
            Refundability memory refundability = refundabilities[curr];
            if (refundability.mintTime == 0) {
                if (curr <= _startTokenId()) {
                    break;
                }
                curr--;
                continue;
            }
            refundWithStartTokenId(tokenId, curr);
            return;
        }
        revert NoRefundableValue();
    }

    function refundWithStartTokenId(uint256 tokenId, uint256 startTokenId)
        public
    {
        if (msg.sender != ownerOf(tokenId)) {
            revert RefundCallerNotOwner();
        }
        if (tokenId < startTokenId) {
            revert InvalidStartTokenId();
        }
        Refundability memory refundability = refundabilities[startTokenId];
        if (
            msg.sender != refundability.mintAddress ||
            refundability.quantity <= tokenId - startTokenId
        ) {
            revert RefundCallerNotInitialOwner();
        }
        if (block.timestamp > refundability.mintTime + refundPeriod) {
            revert RefundExpired();
        }
        _burn(tokenId);
        payable(msg.sender).transfer(uint256(refundability.value) * 1 gwei);
        return;
    }

    modifier noWithdrawBeforePossibleRefund() {
        if (block.timestamp < latestRefundableMintTime + refundPeriod) {
            revert WithdrawInRefundPeriod();
        }
        _;
    }
}

File 10 of 20 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

File 11 of 20 : IERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @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 balance);

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

    /**
     * @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 operator);

    /**
     * @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;
}

File 12 of 20 : 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);
}

File 13 of 20 : IERC721Metadata.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

File 14 of 20 : IERC721Enumerable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

File 15 of 20 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 16 of 20 : ERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./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 17 of 20 : IERC165.sol
// 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
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * 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
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * 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);
}

File 18 of 20 : CryptoPunksInterface.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity >=0.6.0;

import "../contracts/CryptoPunksInterface.sol";

abstract contract XCryptoPunksInterface is CryptoPunksInterface {
    constructor() {}
}

File 19 of 20 : ERC721ARefundable.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity >=0.6.0;

import "../contracts/ERC721ARefundable.sol";

contract XERC721ARefundable is ERC721ARefundable {
    constructor(string memory name_, string memory symbol_, uint64 _refundPeriod) ERC721A(name_, symbol_) ERC721ARefundable(_refundPeriod) {}

    function x_afterTokenTransfers(address from,address to,uint256 startTokenId,uint256 quantity) external {
        return super._afterTokenTransfers(from,to,startTokenId,quantity);
    }

    function x_startTokenId() external view returns (uint256) {
        return super._startTokenId();
    }

    function x_totalMinted() external view returns (uint256) {
        return super._totalMinted();
    }

    function x_numberMinted(address owner) external view returns (uint256) {
        return super._numberMinted(owner);
    }

    function x_numberBurned(address owner) external view returns (uint256) {
        return super._numberBurned(owner);
    }

    function x_getAux(address owner) external view returns (uint64) {
        return super._getAux(owner);
    }

    function x_setAux(address owner,uint64 aux) external {
        return super._setAux(owner,aux);
    }

    function xownershipOf(uint256 tokenId) external view returns (ERC721A.TokenOwnership memory) {
        return super.ownershipOf(tokenId);
    }

    function x_baseURI() external view returns (string memory) {
        return super._baseURI();
    }

    function x_exists(uint256 tokenId) external view returns (bool) {
        return super._exists(tokenId);
    }

    function x_safeMint(address to,uint256 quantity) external {
        return super._safeMint(to,quantity);
    }

    function x_safeMint(address to,uint256 quantity,bytes calldata _data) external {
        return super._safeMint(to,quantity,_data);
    }

    function x_mint(address to,uint256 quantity,bytes calldata _data,bool safe) external {
        return super._mint(to,quantity,_data,safe);
    }

    function x_burn(uint256 tokenId) external {
        return super._burn(tokenId);
    }

    function x_beforeTokenTransfers(address from,address to,uint256 startTokenId,uint256 quantity) external {
        return super._beforeTokenTransfers(from,to,startTokenId,quantity);
    }

    function x_msgSender() external view returns (address) {
        return super._msgSender();
    }

    function x_msgData() external view returns (bytes memory) {
        return super._msgData();
    }
}

File 20 of 20 : RichBaby.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity >=0.6.0;

import "../contracts/RichBaby.sol";

contract XRichBaby is RichBaby {
    constructor(address punkAddress, address baycAddress, address _signerAddress, uint16 _collectionSize, uint64 _refundPeriod) RichBaby(punkAddress, baycAddress, _signerAddress, _collectionSize, _refundPeriod) {}

    function xvalidateMatingRequest(RichBaby.MatingRequest calldata matingRequest,bytes calldata sig) external view {
        return super.validateMatingRequest(matingRequest,sig);
    }

    function xverifyPunkOwnership(uint16 punkId,address holder) external view {
        return super.verifyPunkOwnership(punkId,holder);
    }

    function xverifyBaycOwnership(uint16 baycId,address holder) external view {
        return super.verifyBaycOwnership(baycId,holder);
    }

    function xpunkId2Index(uint16 punkId) external pure returns (uint16) {
        return super.punkId2Index(punkId);
    }

    function xbaycId2Index(uint16 baycId) external pure returns (uint16) {
        return super.baycId2Index(baycId);
    }

    function x_transferOwnership(address newOwner) external {
        return super._transferOwnership(newOwner);
    }

    function x_domainSeparatorV4() external view returns (bytes32) {
        return super._domainSeparatorV4();
    }

    function x_hashTypedDataV4(bytes32 structHash) external view returns (bytes32) {
        return super._hashTypedDataV4(structHash);
    }

    function x_afterTokenTransfers(address from,address to,uint256 startTokenId,uint256 quantity) external {
        return super._afterTokenTransfers(from,to,startTokenId,quantity);
    }

    function x_startTokenId() external view returns (uint256) {
        return super._startTokenId();
    }

    function x_totalMinted() external view returns (uint256) {
        return super._totalMinted();
    }

    function x_numberMinted(address owner) external view returns (uint256) {
        return super._numberMinted(owner);
    }

    function x_numberBurned(address owner) external view returns (uint256) {
        return super._numberBurned(owner);
    }

    function x_getAux(address owner) external view returns (uint64) {
        return super._getAux(owner);
    }

    function x_setAux(address owner,uint64 aux) external {
        return super._setAux(owner,aux);
    }

    function xownershipOf(uint256 tokenId) external view returns (ERC721A.TokenOwnership memory) {
        return super.ownershipOf(tokenId);
    }

    function x_baseURI() external view returns (string memory) {
        return super._baseURI();
    }

    function x_exists(uint256 tokenId) external view returns (bool) {
        return super._exists(tokenId);
    }

    function x_safeMint(address to,uint256 quantity) external {
        return super._safeMint(to,quantity);
    }

    function x_safeMint(address to,uint256 quantity,bytes calldata _data) external {
        return super._safeMint(to,quantity,_data);
    }

    function x_mint(address to,uint256 quantity,bytes calldata _data,bool safe) external {
        return super._mint(to,quantity,_data,safe);
    }

    function x_burn(uint256 tokenId) external {
        return super._burn(tokenId);
    }

    function x_beforeTokenTransfers(address from,address to,uint256 startTokenId,uint256 quantity) external {
        return super._beforeTokenTransfers(from,to,startTokenId,quantity);
    }

    function x_msgSender() external view returns (address) {
        return super._msgSender();
    }

    function x_msgData() external view returns (bytes memory) {
        return super._msgData();
    }
}

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

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"punkAddress","type":"address"},{"internalType":"address","name":"baycAddress","type":"address"},{"internalType":"address","name":"_signerAddress","type":"address"},{"internalType":"uint16","name":"_collectionSize","type":"uint16"},{"internalType":"uint64","name":"_refundPeriod","type":"uint64"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ApprovalCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"ApprovalQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"ApprovalToCurrentOwner","type":"error"},{"inputs":[],"name":"ApproveToCaller","type":"error"},{"inputs":[],"name":"BalanceQueryForZeroAddress","type":"error"},{"inputs":[],"name":"InvalidStartTokenId","type":"error"},{"inputs":[],"name":"MintToZeroAddress","type":"error"},{"inputs":[],"name":"MintZeroQuantity","type":"error"},{"inputs":[],"name":"NoRefundableValue","type":"error"},{"inputs":[],"name":"OwnerQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"RefundCallerNotInitialOwner","type":"error"},{"inputs":[],"name":"RefundCallerNotOwner","type":"error"},{"inputs":[],"name":"RefundExpired","type":"error"},{"inputs":[],"name":"TransferCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"TransferFromIncorrectOwner","type":"error"},{"inputs":[],"name":"TransferToNonERC721ReceiverImplementer","type":"error"},{"inputs":[],"name":"TransferToZeroAddress","type":"error"},{"inputs":[],"name":"URIQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"WithdrawInRefundPeriod","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint16","name":"_proposerTokenId","type":"uint16"},{"indexed":true,"internalType":"bool","name":"_isProposerPunk","type":"bool"},{"indexed":true,"internalType":"uint16","name":"_acceptorTokenId","type":"uint16"},{"indexed":false,"internalType":"address","name":"_acceptor","type":"address"},{"indexed":false,"internalType":"uint16","name":"_babyTokenId","type":"uint16"}],"name":"Breed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint16","name":"_babyTokenId","type":"uint16"},{"indexed":true,"internalType":"uint16","name":"_siblingTokenId","type":"uint16"},{"indexed":true,"internalType":"address","name":"_claimer","type":"address"}],"name":"Claim","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"DEV_MINT_MAX","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MINT_MAX_PER_PHASE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PROVENANCE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"quantity","type":"uint256"},{"internalType":"uint256","name":"salt","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"allowListAdopt","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"babyParents","outputs":[{"internalType":"uint16","name":"punkTokenId","type":"uint16"},{"internalType":"uint16","name":"baycTokenId","type":"uint16"},{"internalType":"bool","name":"isProposerPunk","type":"bool"},{"internalType":"bool","name":"proposerClaimed","type":"bool"},{"internalType":"bool","name":"hasParents","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"baycId","type":"uint16"}],"name":"baycBred","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"proposerAddress","type":"address"},{"internalType":"uint16","name":"proposerTokenId","type":"uint16"},{"internalType":"bool","name":"isProposerPunk","type":"bool"},{"internalType":"uint32","name":"expireAt","type":"uint32"}],"internalType":"struct RichBaby.MatingRequest","name":"matingRequest","type":"tuple"},{"internalType":"uint16","name":"acceptorTokenId","type":"uint16"},{"internalType":"bytes","name":"sig","type":"bytes"}],"name":"breed","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"siblingId","type":"uint16"}],"name":"claimBaby","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"collectionSize","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"quantity","type":"uint256"}],"name":"devMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"devMinted","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"latestRefundableMintTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"enum RichBaby.SalePhase","name":"","type":"uint8"},{"internalType":"address","name":"","type":"address"}],"name":"mintedCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"quantity","type":"uint256"},{"internalType":"uint256","name":"salt","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"publicAdopt","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint16","name":"punkId","type":"uint16"}],"name":"punkBred","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"refund","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"startTokenId","type":"uint256"}],"name":"refundWithStartTokenId","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"saleConfig","outputs":[{"internalType":"uint64","name":"startTimestamp","type":"uint64"},{"internalType":"uint64","name":"price","type":"uint64"},{"internalType":"enum RichBaby.SalePhase","name":"phase","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"newBaseURI","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"provenance","type":"bytes32"}],"name":"setProvenance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"uint64","name":"startTimestamp","type":"uint64"},{"internalType":"uint64","name":"price","type":"uint64"},{"internalType":"enum RichBaby.SalePhase","name":"phase","type":"uint8"}],"internalType":"struct RichBaby.SaleConfig","name":"_saleConfig","type":"tuple"}],"name":"setSaleConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newSignerAddress","type":"address"}],"name":"setSignerAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"price","type":"uint64"},{"internalType":"uint64","name":"startTime","type":"uint64"}],"name":"startAllowlistSale","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"startTime","type":"uint64"}],"name":"startBreedSale","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"price","type":"uint64"},{"internalType":"uint64","name":"startTime","type":"uint64"}],"name":"startPublicSale","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"beneficiary","type":"address"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000b47e3cd837ddf8e4c57f05d70ab865de6e193bbb000000000000000000000000bc4ca0eda7647a8ab7c2061c2e118a18a936f13d000000000000000000000000c985e28945e5d34953a427161094664193bb81a000000000000000000000000000000000000000000000000000000000000027100000000000000000000000000000000000000000000000000000000000093a80

-----Decoded View---------------
Arg [0] : punkAddress (address): 0xb47e3cd837dDF8e4c57F05d70Ab865de6e193BBB
Arg [1] : baycAddress (address): 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D
Arg [2] : _signerAddress (address): 0xc985E28945e5D34953A427161094664193Bb81a0
Arg [3] : _collectionSize (uint16): 10000
Arg [4] : _refundPeriod (uint64): 604800

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000b47e3cd837ddf8e4c57f05d70ab865de6e193bbb
Arg [1] : 000000000000000000000000bc4ca0eda7647a8ab7c2061c2e118a18a936f13d
Arg [2] : 000000000000000000000000c985e28945e5d34953a427161094664193bb81a0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000002710
Arg [4] : 0000000000000000000000000000000000000000000000000000000000093a80


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OVERVIEW

10,000 rich babies on the Ethereum blockchain. Each baby directly inherits traits from one CryptoPunks parent and one Bored Ape Yacht Club parent.Phase 1 mint is now available for all CryptoPunks and BAYC owners to mint in pairs for free! Go to [https://rich.baby/mint](https...

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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.