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• interface IERC165
•    - function supportsInterface(bytes4 int ...
• interface IERC721 is IERC165
•    - function balanceOf(address owner)
•    - function ownerOf(uint256 tokenId)
•    - function safeTransferFrom(address fro ...
•    - function safeTransferFrom(address fro ...
•    - function transferFrom(address from, a ...
•    - function approve(address to, uint256 ...
•    - function setApprovalForAll(address op ...
•    - function getApproved(uint256 tokenId)
•    - function isApprovedForAll(address own ...
• interface ICryptoPunksMarket
•    - function punkIndexToAddress(uint256 i ...
•  contract NFTBatchTransfer *
•    - function batchTransferFrom(
•    - function batchPunkTransferFrom(

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/**
 *Submitted for verification at Etherscan.io on 2023-09-20
*/

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/IERC721.sol)

// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

/**
 * @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);
}

/**
 * @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`.
     *
     * 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;

    /**
     * @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 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: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * 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 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 the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @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);
}

/**
 * @title ICryptoPunksMarket
 * @author Unlockd
 * @notice Defines the basic interface to interact with PunksMarket.
 **/
interface ICryptoPunksMarket {
  function punkIndexToAddress(uint256 index) external view returns (address);
}

/**
 * @title NFTBatchTransfer
 * @dev This is a public contract in order to allow batch transfers of NFTs,
 * in a single transaction, reducing gas costs and improving efficiency.
 * It is designed to work with standard ERC721 contracts, as well as the CryptoPunks contract.
 * No events, use the ones from the ERC721 contract
 */
contract NFTBatchTransfer {

    /*//////////////////////////////////////////////////////////////
                             ERRORS
    //////////////////////////////////////////////////////////////*/
    error TransferFromFailed();
    error BuyFailed();
    error TransferFailed();
    error NotOwner();
    error CantReceiveETH();
    error Fallback();
    
    /*//////////////////////////////////////////////////////////////
                           IMMUTABLES
    //////////////////////////////////////////////////////////////*/
    // Immutable address for the CryptoPunks contract. This is set at deployment and cannot be altered afterwards.
    address public immutable punkContract;

    /*//////////////////////////////////////////////////////////////
                              STRUCTS
    //////////////////////////////////////////////////////////////*/
    // Struct to encapsulate information about an individual NFT transfer.
    // It holds the address of the ERC721 contract and the specific token ID to be transferred.
    struct NftTransfer {
        address contractAddress;
        uint256 tokenId;
    }

    /*//////////////////////////////////////////////////////////////
                          INITIALIZATION
    //////////////////////////////////////////////////////////////*/
    /**
     * @dev Constructor to set the initial state of the contract.
     * @param _punkContract The address of the CryptoPunks contract.
     */
    constructor(address _punkContract) {
        punkContract = _punkContract;
    }

    /*//////////////////////////////////////////////////////////////
                    Fallback and Receive Functions
    //////////////////////////////////////////////////////////////*/
    // Explicitly reject any Ether sent to the contract
    fallback() external payable {
        revert Fallback();
    }

    // Explicitly reject any Ether transfered to the contract
    receive() external payable {
        revert CantReceiveETH();
    }

    /*//////////////////////////////////////////////////////////////
                          LOGIC
    //////////////////////////////////////////////////////////////*/
    /**
     * @dev Orchestrates a batch transfer of standard ERC721 NFTs.
     * @param nftTransfers An array of NftTransfer structs detailing the NFTs to be moved.
     * @param to The recipient's address.
     */
    function batchTransferFrom(
        NftTransfer[] calldata nftTransfers,
        address to
    ) external payable {
        uint256 length = nftTransfers.length;

        // Iterate through each NFT in the array to facilitate the transfer.
        for (uint i = 0; i < length;) {
            address contractAddress = nftTransfers[i].contractAddress;
            uint256 tokenId = nftTransfers[i].tokenId;

            // Dynamically call the `transferFrom` function on the target ERC721 contract.
            (bool success, ) = contractAddress.call(
                abi.encodeWithSignature(
                    "transferFrom(address,address,uint256)",
                    msg.sender,
                    to,
                    tokenId
                )
            );

            // Check the transfer status.
            if (!success) {
                revert TransferFromFailed();
            }

            // Use unchecked block to bypass overflow checks for efficiency.
            unchecked {
                i++;
            }
        }
    }

    /**
     * @dev Manages a batch transfer of NFTs, that allow the use of 
     * CryptoPunks alongside other standard ERC721 NFTs.
     * @param nftTransfers An array of NftTransfer structs specifying the NFTs for transfer.
     * @param to The destination address for the NFTs.
     */
    function batchPunkTransferFrom(
        NftTransfer[] calldata nftTransfers,
        address to
    ) external payable {
        uint256 length = nftTransfers.length;
        bool success;

        // Process batch transfers, differentiate between CryptoPunks and standard ERC721 tokens.
        for (uint i = 0; i < length;) {
            address contractAddr = nftTransfers[i].contractAddress;
            uint256 tokenId = nftTransfers[i].tokenId;

            // Check if the NFT is a CryptoPunk.
            if (contractAddr != punkContract) {
                // If it's not a CryptoPunk, use the standard ERC721 `transferFrom` function.
                (success, ) = contractAddr.call(
                    abi.encodeWithSignature(
                        "transferFrom(address,address,uint256)",
                        msg.sender,
                        to,
                        tokenId
                    )
                );
            } 
            // If it's a CryptoPunk, use the CryptoPunksMarket contract to transfer the punk.
            else { 
                // Verify OwnerShip
                if(ICryptoPunksMarket(punkContract).punkIndexToAddress(tokenId) != msg.sender) 
                    revert NotOwner();
                
                // If it's a CryptoPunk, first the contract buy the punk to be allowed to transfer it.
                (success, ) = punkContract.call{value: 0}(
                    abi.encodeWithSignature("buyPunk(uint256)", tokenId)
                );

                // Check the buyPunk status
                if (!success) {
                    revert BuyFailed();
                }

                // Once the punk is owned by the contract, the transfer method is executed
                (success, ) = punkContract.call(
                    abi.encodeWithSignature(
                        "transferPunk(address,uint256)",
                        to,
                        tokenId
                    )
                );
                
                // Check the transfer status.
                if (!success) {
                    revert TransferFailed();
                }
            }

            // Use unchecked block to bypass overflow checks for efficiency.
            unchecked { 
                i++; 
            }
        }
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

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000000000000000000000000b47e3cd837ddf8e4c57f05d70ab865de6e193bbb

-----Decoded View---------------
Arg [0] : _punkContract (address): 0xb47e3cd837dDF8e4c57F05d70Ab865de6e193BBB

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000b47e3cd837ddf8e4c57f05d70ab865de6e193bbb

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ipfs://53851de2876355d5f677ee1b533a1a45029c9c696babd22c335977ba031b1ae5