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//SPDX-License-Identifier: Unlicense
pragma solidity 0.8.14;

import "IERC721.sol";
import "Ownable.sol";
import "IWithBalance.sol";

/// @title A Seller Contract for selling single NFTs (modified contract of Avo Labs GmbH)
/// @notice This contract can be used for selling any NFTs
contract NFTSeller is Ownable {
    address[] public whitelistedPassCollections; //Only owners of tokens from any of these collections can buy if is onlyWhitelisted
    mapping(address => mapping(uint256 => Sale)) public nftContractAuctions; // variable name is the same as in NFTAuction
    mapping(address => uint256) failedTransferCredits;
    //Each Sale is unique to each NFT (contract + id pairing).
    struct Sale {
        //map token ID to
        uint64 auctionStart; // name is the same as in NFTAuction
        uint64 auctionEnd; // name is the same as in NFTAuction
        uint128 buyNowPrice;
        address feeRecipient;
        bool onlyWhitelisted; // if true, than only owners of whitelistedPassCollections can make bids
    }

    /*╔═════════════════════════════╗
      ║           EVENTS            ║
      ╚═════════════════════════════╝*/

    event NftAuctionCreated(
        address indexed nftContractAddress,
        uint256 indexed tokenId,
        uint128 buyNowPrice,
        uint64 auctionStart,
        uint64 auctionEnd,
        address feeRecipient,
        bool onlyWhitelisted
    );

    event NFTTransferredAndSellerPaid(
        address indexed nftContractAddress,
        uint256 indexed tokenId,
        uint128 nftHighestBid,
        address nftHighestBidder
    );

    event AuctionWithdrawn(
        address indexed nftContractAddress,
        uint256 indexed tokenId
    );
    /**********************************/
    /*╔═════════════════════════════╗
      ║             END             ║
      ║            EVENTS           ║
      ╚═════════════════════════════╝*/
    /**********************************/
    /*╔═════════════════════════════╗
      ║          MODIFIERS          ║
      ╚═════════════════════════════╝*/

    modifier needWhitelistedToken(address _nftContractAddress, uint256 _tokenId) {
        if (nftContractAuctions[_nftContractAddress][_tokenId].onlyWhitelisted) {
            bool isWhitelisted;
            for (uint256 i = 0; i < whitelistedPassCollections.length; i++) {
                if(IWithBalance(whitelistedPassCollections[i]).balanceOf(msg.sender) > 0) {
                    isWhitelisted = true;
                    break;
                }
            }
            require(isWhitelisted, "Sender has no whitelisted NFTs");
        }
        _;
    }

    modifier saleOngoing(address _nftContractAddress, uint256 _tokenId) {
        require(
            _isSaleStarted(_nftContractAddress, _tokenId),
            "Sale has not started"
        );
        require(
            _isSaleOngoing(_nftContractAddress, _tokenId),
            "Sale has ended"
        );
        _;
    }

    modifier ethAmountMeetsBuyRequirements(
        address _nftContractAddress,
        uint256 _tokenId
    ) {
        require(
            msg.value >= nftContractAuctions[_nftContractAddress][_tokenId].buyNowPrice,
            "Not enough funds to buy NFT"
        );
        _;
    }

    modifier notZeroAddress(address _address) {
        require(_address != address(0), "Cannot specify 0 address");
        _;
    }

    /**********************************/
    /*╔═════════════════════════════╗
      ║             END             ║
      ║          MODIFIERS          ║
      ╚═════════════════════════════╝*/
    /**********************************/
    // constructor
    constructor(address[] memory _whitelistedPassCollectionsAddresses) {
        uint256 collectionsCount = _whitelistedPassCollectionsAddresses.length;
        for (uint256 i = 0; i < collectionsCount; i++) {
            whitelistedPassCollections.push(_whitelistedPassCollectionsAddresses[i]);
        }
    }
    /**********************************/
    /*╔══════════════════════════════╗
      ║     WHITELIST FUNCTIONS      ║
      ╚══════════════════════════════╝*/
    /*
     * Add whitelisted pass collection.
     */
    function addWhitelistedCollection(address _collectionContractAddress)
    external
    onlyOwner
    {
        whitelistedPassCollections.push(_collectionContractAddress);
    }

    /*
     * Remove whitelisted pass collection by index.
     */
    function removeWhitelistedCollection(uint256 index)
    external
    onlyOwner
    {
        whitelistedPassCollections[index] = whitelistedPassCollections[whitelistedPassCollections.length - 1];
        whitelistedPassCollections.pop();
    }
    /**********************************/
    /*╔══════════════════════════════╗
      ║             END              ║
      ║     WHITELIST FUNCTIONS      ║
      ╚══════════════════════════════╝*/
    /**********************************/
    /*╔══════════════════════════════╗
      ║     SALE CHECK FUNCTIONS     ║
      ╚══════════════════════════════╝*/
    function _isSaleStarted(address _nftContractAddress, uint256 _tokenId)
    internal
    view
    returns (bool)
    {
        return (block.timestamp >= nftContractAuctions[_nftContractAddress][_tokenId].auctionStart);
    }

    function _isSaleOngoing(address _nftContractAddress, uint256 _tokenId)
    internal
    view
    returns (bool)
    {
        uint64 auctionEndTimestamp = nftContractAuctions[_nftContractAddress][_tokenId].auctionEnd;
        //if the auctionEnd is set to 0, the sale is on-going and doesn't have specified end.
        return (auctionEndTimestamp == 0 || block.timestamp < auctionEndTimestamp);
    }

    /**********************************/
    /*╔══════════════════════════════╗
      ║             END              ║
      ║     SALE CHECK FUNCTIONS     ║
      ╚══════════════════════════════╝*/
    /**********************************/

    /*╔══════════════════════════════╗
      ║         SALE CREATION        ║
      ╚══════════════════════════════╝*/

    function createNewNftAuctions(
        address _nftContractAddress,
        uint256[] memory _tokenIds,
        uint64 _auctionStart,
        uint64 _auctionEnd,
        uint128 _buyNowPrice,
        address _feeRecipient,
        bool _onlyWhitelisted
    )
    external
    onlyOwner
    notZeroAddress(_feeRecipient)
    {
        require(_auctionEnd >= _auctionStart || _auctionEnd == 0, "Sale end must be after the start");

        for (uint256 i = 0; i < _tokenIds.length; i++) {
            uint256 _tokenId = _tokenIds[i];

            require(
                nftContractAuctions[_nftContractAddress][_tokenId].feeRecipient == address(0),
                "Sale is already created"
            );

            Sale memory sale; // creating the sale
            sale.auctionStart = _auctionStart;
            sale.auctionEnd = _auctionEnd;
            sale.buyNowPrice = _buyNowPrice;
            sale.feeRecipient = _feeRecipient;
            sale.onlyWhitelisted = _onlyWhitelisted;

            nftContractAuctions[_nftContractAddress][_tokenId] = sale;

            // Sending the NFT to this contract
            if (IERC721(_nftContractAddress).ownerOf(_tokenId) == msg.sender) {
                IERC721(_nftContractAddress).transferFrom(
                    msg.sender,
                    address(this),
                    _tokenId
                );
            }
            require(
                IERC721(_nftContractAddress).ownerOf(_tokenId) == address(this),
                "NFT transfer failed"
            );

            emit NftAuctionCreated(
                _nftContractAddress,
                _tokenId,
                _buyNowPrice,
                _auctionStart,
                _auctionEnd,
                _feeRecipient,
                _onlyWhitelisted
            );
        }
    }

    /**********************************/
    /*╔══════════════════════════════╗
      ║             END              ║
      ║         SALE CREATION        ║
      ╚══════════════════════════════╝*/
    /**********************************/

    /*╔═════════════════════════════╗
      ║        BID FUNCTIONS        ║
      ╚═════════════════════════════╝*/

    /********************************************************************
     *                          Make bids with ETH.                     *
     ********************************************************************/

    function makeBid( // function name is the same as in NFTAuction
        address _nftContractAddress,
        uint256 _tokenId
    )
    external
    payable
    saleOngoing(_nftContractAddress, _tokenId)
    needWhitelistedToken(
        _nftContractAddress,
        _tokenId
    )
    ethAmountMeetsBuyRequirements(
        _nftContractAddress,
        _tokenId
    )
    {
        require(msg.sender == tx.origin, "Sender must be a wallet");
        address _feeRecipient = nftContractAuctions[_nftContractAddress][_tokenId].feeRecipient;
        require(_feeRecipient != address(0), "Sale does not exist");

        // attempt to send the funds to the recipient
        (bool success, ) = payable(_feeRecipient).call{ value: msg.value, gas: 20000 }("");
        // if it failed, update their credit balance so they can pull it later
        if (!success) failedTransferCredits[_feeRecipient] = failedTransferCredits[_feeRecipient] + msg.value;

        IERC721(_nftContractAddress).transferFrom(address(this), msg.sender, _tokenId);

        delete nftContractAuctions[_nftContractAddress][_tokenId];

        emit NFTTransferredAndSellerPaid(_nftContractAddress, _tokenId, uint128(msg.value), msg.sender);
    }

    /**********************************/
    /*╔══════════════════════════════╗
      ║             END              ║
      ║        BID FUNCTIONS         ║
      ╚══════════════════════════════╝*/
    /**********************************/

    /*╔══════════════════════════════╗
      ║           WITHDRAW           ║
      ╚══════════════════════════════╝*/
    function withdrawAuctions(address _nftContractAddress, uint256[] memory _tokenIds)
    external
    onlyOwner
    {
        for (uint256 i = 0; i < _tokenIds.length; i++) {
            uint256 _tokenId = _tokenIds[i];
            delete nftContractAuctions[_nftContractAddress][_tokenId];
            IERC721(_nftContractAddress).transferFrom(address(this), owner(), _tokenId);
            emit AuctionWithdrawn(_nftContractAddress, _tokenId);
        }
    }

    /*
     * If the transfer of a bid has failed, allow to reclaim amount later.
     */
    function withdrawAllFailedCreditsOf(address recipient) external {
        uint256 amount = failedTransferCredits[recipient];

        require(amount != 0, "no credits to withdraw");

        failedTransferCredits[recipient] = 0;

        (bool successfulWithdraw, ) = recipient.call{
        value: amount,
        gas: 20000
        }("");
        require(successfulWithdraw, "withdraw failed");
    }

    /**********************************/
    /*╔══════════════════════════════╗
      ║             END              ║
      ║           WITHDRAW           ║
      ╚══════════════════════════════╝*/
    /**********************************/
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "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;
}

// SPDX-License-Identifier: MIT

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);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "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 () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), 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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// SPDX-License-Identifier: MIT

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) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

interface IWithBalance {
    function balanceOf(address owner) external view returns (uint256);
}

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

• No Contract Security Audit Submitted- Submit Audit Here

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00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _whitelistedPassCollectionsAddresses (address[]): 

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000020
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000000