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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

import {ERC165Checker} from "@openzeppelin/contracts/utils/introspection/ERC165Checker.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import {IMastodonMarketplace} from "./IMastodonMarketplace.sol";
import {IERC20} from "@openzeppelin/contracts/interfaces/IERC20.sol";
import {IERC721} from "@openzeppelin/contracts/interfaces/IERC721.sol";
import {IERC1155} from "@openzeppelin/contracts/interfaces/IERC1155.sol";
import {IERC721Receiver} from "@openzeppelin/contracts/interfaces/IERC721Receiver.sol";
import {IERC1155Receiver} from "@openzeppelin/contracts/interfaces/IERC1155Receiver.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

/**
 * @title MastodonMarketplace
 * @dev A decentralized marketplace contract for trading ERC721 and ERC1155 NFTs.
 * Users can list, delist, and buy NFTs using native tokens or specified ERC20 tokens.
 */
contract MastodonMarketplace is
    IMastodonMarketplace,
    IERC721Receiver,
    IERC1155Receiver,
    ReentrancyGuard
{
    using SafeERC20 for IERC20;
    /**
     * @notice The global index representing the unique identifier for NFT listings on the marketplace.
     * @dev It increments with each new listing, providing a unique identifier for tracking and referencing listings.
     */
    uint256 public globalIndex;

    // Constants for fee calculations
    uint16 private constant MAX_BPS = 10000;
    uint16 private constant BURN_FEE_BPS = 350;
    uint8 private constant DEV_FEE_BPS = 150;

    //The ERC20 token contract address for the $XEN token.
    IERC20 public immutable xen;

    //The ERC20 token contract address for the $DXN token.
    IERC20 public immutable dxn;

    //The address of the contract developer.
    address public immutable dev;

    //The address of smart contract designated to BUY & BURN $DXN tokens
    //with $XEN token and native token of blockchain.
    address public dxnBuyBurn;

    /**
     * @dev The pending DXN token burn address.
     * @notice This address is set and updated by the developer before it becomes the active burn address.
     */
    address public pendingDxnBuyBurn;

    /**
     * @dev Flag indicating whether ownership of the DXN token burn functionality is renounced.
     * @notice If true, ownership is not renounced; if false, ownership is renounced.
     */
    bool public isOwned = true;

    /**
     * @dev Constant defining the duration of the time-lock for updates to the DXN token burn address.
     * @notice After setting a pending burn address, a delay of LOCK_DURATION must pass before it becomes active.
     */
    uint256 private constant LOCK_DURATION = 7 days;

    /**
     * @dev The timestamp threshold for updating the DXN token burn address.
     * @notice This threshold determines when the pending burn address becomes the active burn address.
     */
    uint256 public timeThreshold;

    // Mapping to store NFT orders
    mapping(uint256 listIndex => Order order) public orders;

    /**
     * @dev Constructor to initialize the MastodonMarketplace contract.
     * @param _xen The address of the $XEN token contract.
     * @param _dxn The address of the $DXN token contract.
     * @param _dxnBuyBurn The address of smart contract for burning DXN tokens.
     */
    constructor(IERC20 _xen, IERC20 _dxn, address _dxnBuyBurn) {
        require(_dxnBuyBurn != address(0), "Mastodon: zero address is not allowed");

        xen = _xen;
        dxn = _dxn;
        dxnBuyBurn = _dxnBuyBurn;
        dev = msg.sender;
    }

    /**
     * @dev Batch lists multiple NFTs for sale on the marketplace.
     * @param inputOrders An array of InputOrder structures representing the NFTs to be listed.
     */
    function batchList(InputOrder[] calldata inputOrders) external nonReentrant {
        uint256 arrayLength = inputOrders.length;
        for (uint256 i = 0; i < arrayLength; i++) {
            _list(inputOrders[i]);
        }
    }

    /**
     * @dev Batch delists multiple NFTs from the marketplace.
     * @param listIndexes An array of list indexes representing the NFTs to be delisted.
     */
    function batchDelist(uint256[] calldata listIndexes) external nonReentrant {
        uint256 arrayLength = listIndexes.length;
        for (uint256 i = 0; i < arrayLength; i++) {
            _delist(listIndexes[i]);
        }
    }

    /**
     * @dev Batch buys multiple NFTs from the marketplace.
     * @param listIndexes An array of list indexes representing the NFTs to be bought.
     */
    function batchBuy(uint256[] calldata listIndexes) external payable nonReentrant {
        uint256 arrayLength = listIndexes.length;
        for (uint256 i = 0; i < arrayLength; i++) {
            _buy(listIndexes[i]);
        }

        if(address(this).balance > 0){
            (bool success, ) = msg.sender.call{
                value: address(this).balance
            }("");
            require(success, "Mastodon: remaining funds failed");
        }
    }

    /**
     * @dev Batch changing prices and payout tokens for multiple NFTs from the marketplace.
     * @param listIndexes An array of list indexes representing the NFTs for which the prices will be changed.
     * @param newPrices An array of Price structures representing the new prices corresponding to the NFTs.
     */
    function batchChangePrice(uint256[] calldata listIndexes, Price[] calldata newPrices) external nonReentrant {
        require(listIndexes.length == newPrices.length, "Mastodon: length diff");

        uint256 arrayLength = listIndexes.length;
        for (uint256 i = 0; i < arrayLength; i++) {
            _changePrice(listIndexes[i], newPrices[i]);
        }
    }

    /**
     * @dev Sets the pending $DXN token burn address and updates the time threshold.
     * @param _dxnBuyBurn The address for buying and burning DXN tokens.
     */
    function setPendingDxnBuyBurn(address _dxnBuyBurn) external {
        require(isOwned == true, "Mastodon: renounced to ownership");
        require(msg.sender == dev, "Mastodon: not dev");
        require(_dxnBuyBurn != address(0), "Mastodon: zero address is not allowed");

        timeThreshold = block.timestamp + LOCK_DURATION;
        pendingDxnBuyBurn = _dxnBuyBurn;
    }

    /**
     * @dev Accepts the pending $DXN token burn address after conditions are met.
     */
    function acceptDxnBuyBurn() external {
        require(isOwned == true, "Mastodon: renounced to ownership");
        require(msg.sender == dev, "Mastodon: not dev");
        require(block.timestamp > timeThreshold, "Mastodon: not enough time passed");

        dxnBuyBurn = pendingDxnBuyBurn;
    }

    /**
     * @dev Renounces ownership of changing the dxn address for buy and burn.
     */
    function renounceDxnBuyBurnOwnership () external {
        require(msg.sender == dev, "Mastodon: not dev");
        isOwned = false;
    }

    /**
     * @dev Lists a single NFT for sale on the marketplace.
     * @param inputOrder An InputOrder structure representing the NFT to be listed.
     */
    function _list(InputOrder calldata inputOrder) internal {
        globalIndex++;

        Order storage newOrder = orders[globalIndex];
        newOrder.nftContract = inputOrder.nftContract;
        newOrder.tokenId = inputOrder.tokenId;
        newOrder.payoutToken = inputOrder.payoutToken;
        newOrder.price = inputOrder.price;
        newOrder.seller = msg.sender;

        bool supportsERC721 = ERC165Checker.supportsInterface(
            inputOrder.nftContract,
            type(IERC721).interfaceId
        );
        bool supportsERC1155 = ERC165Checker.supportsInterface(
            inputOrder.nftContract,
            type(IERC1155).interfaceId
        );

        if (supportsERC721 && !supportsERC1155) {
            newOrder.assetClass = AssetClass.ERC721;
            IERC721(inputOrder.nftContract).safeTransferFrom(
                msg.sender,
                address(this),
                inputOrder.tokenId
            );
        } else if (!supportsERC721 && supportsERC1155) {
            require(inputOrder.supply > 0, "Mastodon: erc1155 supply > 0");
            newOrder.supply = inputOrder.supply;
            newOrder.assetClass = AssetClass.ERC1155;
            IERC1155(inputOrder.nftContract).safeTransferFrom(
                msg.sender,
                address(this),
                inputOrder.tokenId,
                inputOrder.supply,
                "0x0"
            );
        } else if (supportsERC721 && supportsERC1155) {
            if (inputOrder.supply == 0) {
                newOrder.assetClass = AssetClass.BothClass_ERC721;
                IERC721(inputOrder.nftContract).safeTransferFrom(
                    msg.sender,
                    address(this),
                    inputOrder.tokenId
                );
            } else {
                newOrder.assetClass = AssetClass.BothClass_ERC1155;
                newOrder.supply = inputOrder.supply;
                IERC1155(inputOrder.nftContract).safeTransferFrom(
                    msg.sender,
                    address(this),
                    inputOrder.tokenId,
                    inputOrder.supply,
                    "0x0"
                );
            }
        } else {
            revert("Mastodon: not supported");
        }

        emit List(globalIndex, newOrder);
    }

    /**
     * @dev Delists a single NFT from the marketplace.
     * @param listIndex The index of the NFT to be delisted.
     */
    function _delist(uint256 listIndex) internal {
        require(
            orders[listIndex].seller == msg.sender,
            "Mastodon: not the order owner"
        );

        Order memory order = orders[listIndex];

        if (
            order.assetClass == AssetClass.ERC721 ||
            order.assetClass == AssetClass.BothClass_ERC721
        ) {
            IERC721(orders[listIndex].nftContract).safeTransferFrom(
                address(this),
                msg.sender,
                orders[listIndex].tokenId
            );
        } else if (
            order.assetClass == AssetClass.ERC1155 ||
            order.assetClass == AssetClass.BothClass_ERC1155

        ) {
            IERC1155(orders[listIndex].nftContract).safeTransferFrom(
                address(this),
                msg.sender,
                order.tokenId,
                order.supply,
                "0x0"
            );
        } else revert("Mastodon: not supported");

        emit Delist(listIndex, order);
        delete (orders[listIndex]);
    }

    /**
     * @dev Buys a single NFT from the marketplace.
     * @param listIndex The index of the NFT to be bought.
     */
    function _buy(uint256 listIndex) internal {
        Order memory order = orders[listIndex];

        uint256 price = order.price;

        uint256 sellerProceeds = (price * 9500) / MAX_BPS;
        uint256 developerFee = (price * DEV_FEE_BPS) /MAX_BPS;
        uint256 burnAmount = (price * BURN_FEE_BPS) / MAX_BPS;

        if (order.payoutToken == PayoutToken.NativeToken) {
            require(address(this).balance >= price, "Mastodon: invalid price");

            (bool success, ) = order.seller.call{
                value: sellerProceeds
            }("");
            require(success, "Mastodon: 1.Payment failed.");

            (success, ) = dev.call{value: developerFee}("");
            require(success, "Mastodon: 2.Payment failed.");

            (success, ) = dxnBuyBurn.call{value: burnAmount}("");
            require(success, "Mastodon: 3.Payment failed.");
        } else if (order.payoutToken == PayoutToken.Xen) {
            xen.safeTransferFrom(msg.sender, order.seller, sellerProceeds);

            xen.safeTransferFrom(msg.sender, dev, developerFee);

            xen.safeTransferFrom(msg.sender, dxnBuyBurn, burnAmount);
        } else {
            dxn.safeTransferFrom(msg.sender, order.seller, sellerProceeds);

            dxn.safeTransferFrom(msg.sender, dev, developerFee);

            dxn.safeTransferFrom(
                msg.sender,
                0x000000000000000000000000000000000000dEaD,
                burnAmount
            );
        }

        if (order.assetClass == AssetClass.ERC721 ||
            order.assetClass == AssetClass.BothClass_ERC721) {
            IERC721(order.nftContract).safeTransferFrom(
                address(this),
                msg.sender,
                order.tokenId
            );
        } else {
            IERC1155(order.nftContract).safeTransferFrom(
                address(this),
                msg.sender,
                order.tokenId,
                order.supply,
                "0x0"
            );
        }

        emit Buy(listIndex, orders[listIndex]);
        delete (orders[listIndex]);
    }

    /**
     * @dev Updates the price and payout token for a specific NFT listing.
     * @param listIndex The index of the NFT listing to be updated.
     * @param newPrice A Price structure representing the new price and payout token for the NFT.
     */
    function _changePrice(uint256 listIndex, Price calldata newPrice) internal {
        require(
            orders[listIndex].seller == msg.sender,
            "Mastodon: not the order owner"
        );

        orders[listIndex].payoutToken = newPrice.payoutToken;
        orders[listIndex].price = newPrice.newPrice;

        emit NewPrice(listIndex, newPrice);
    }

    // ERC721 and ERC1155 receiver functions... //

    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4) {
        return (this.onERC721Received.selector);
    }

    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4) {
        return (this.onERC1155Received.selector);
    }

    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4) {
        return (this.onERC1155BatchReceived.selector);
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(
        bytes4 interfaceId
    ) public view override returns (bool) {}

}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

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

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

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

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

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

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

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1155Receiver.sol)

pragma solidity ^0.8.0;

import "../token/ERC1155/IERC1155Receiver.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC721Receiver.sol)

pragma solidity ^0.8.0;

import "../token/ERC721/IERC721Receiver.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1155.sol)

pragma solidity ^0.8.0;

import "../token/ERC1155/IERC1155.sol";

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

pragma solidity ^0.8.0;

import "../token/ERC721/IERC721.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol)

pragma solidity ^0.8.0;

import "../token/ERC20/IERC20.sol";

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

import {IERC721} from "@openzeppelin/contracts/interfaces/IERC721.sol";
import {IERC1155} from "@openzeppelin/contracts/interfaces/IERC1155.sol";

/**
 * @dev A decentralized marketplace for buying and selling NFTs (Non-Fungible Tokens) using Ethereum.
 * @notice This contract allows users to list NFTs for sale, buy NFTs from other users, and delist NFTs.
 */
interface IMastodonMarketplace {
    /**
     * @dev Enumeration of possible payout tokens for an NFT sale.
     */
    enum PayoutToken {
        NativeToken, // Ether
        Xen, // ERC20 token (Xen)
        Dxn // ERC20 token (Dxn)
    }

    enum AssetClass {
        ERC721, // Represents a single ERC721 token.
        ERC1155, // Represents an ERC1155 token.
        BothClass_ERC721, // Represents the smart contracts that inherit
        BothClass_ERC1155 // ERC721 & ERC1155 but it will transfer one type in sc
    }

    /**
     * @dev Struct representing the details of an NFT listing.
     */
    struct InputOrder {
        address nftContract; // The address of the NFT contract.
        uint256 tokenId; // The ID of the NFT or batch of NFTs.
        uint256 supply; // The supply of NFTs for ERC1155 tokens, set to 0 for ERC721.
        PayoutToken payoutToken; // The desired token to receive as payment.
        uint256 price; // The price at which the NFT is listed for sale.
    }

    /**
     * @dev Struct representing an active order on the marketplace.
     */
    struct Order {
        address nftContract; // The address of the NFT contract.
        address seller; // The address of the seller.
        uint256 tokenId; // The ID of the NFT or batch of NFTs.
        uint256 supply; // The supply of NFTs for ERC1155 tokens, set to 0 for ERC721.
        PayoutToken payoutToken; // The desired token to receive as payment.
        uint256 price; // The price at which the NFT is listed for sale.
        AssetClass assetClass; // The type of NFT collection
    }

    /**
     * @dev Struct representing the details necessary to change the price.
     */
    struct Price {
        PayoutToken payoutToken; // The desired token to receive as payment.
        uint256 newPrice; // The new price for Order
    }

    /**
     * @dev Event emitted when a new NFT is listed on the marketplace.
     * @param orderIndex The index of the order in the marketplace.
     * @param order The details of the listed NFT order.
     */
    event List(uint256 indexed orderIndex, Order order);

    /**
     * @dev Event emitted when an existing NFT listing is delisted from the marketplace.
     * @param orderIndex The index of the order in the marketplace.
     * @param order The details of the delisted NFT order.
     */
    event Delist(uint256 indexed orderIndex, Order order);

    /**
     * @dev Event emitted when a user successfully purchases an NFT from the marketplace.
     * @param orderIndex The index of the order in the marketplace.
     * @param order The details of the purchased NFT order.
     */
    event Buy(uint256 indexed orderIndex, Order order);

    /**
     * @dev This event provides information about the updated price and payout token for a specific NFT listing.
     * @param orderIndex The index of the NFT listing for which the price has been changed.
     * @param newPrice A Price structure representing the new price and payout token for the NFT.
     */
    event NewPrice(uint256 indexed orderIndex, Price newPrice);

    /**
     * @dev Lists multiple NFTs on the marketplace.
     * @param inputOrders An array of InputOrder structures representing the NFTs to be listed.
     */
    function batchList(InputOrder[] calldata inputOrders) external;

    /**
     * @dev Delists multiple NFTs from the marketplace.
     * @param listIndexes An array of indexes representing the NFT orders to be delisted.
     */
    function batchDelist(uint256[] calldata listIndexes) external;

    /**
     * @dev Allows users to purchase multiple NFTs from the marketplace.
     * @param listIndexes An array of indexes representing the NFT orders to be purchased.
     */
    function batchBuy(uint256[] calldata listIndexes) external payable;

    /**
     * @notice Allows the order owner to change the prices of listed NFTs and the payout token.
     * @param listIndexes An array of list indexes representing the NFTs for which the prices will be changed.
     * @param newPrices An array of Price structures representing the new payout tokens & prices corresponding to the NFTs.
     */
    function batchChangePrice(uint256[] calldata listIndexes, Price[] calldata newPrices ) external;

}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant NOT_ENTERED = 1;
    uint256 private constant ENTERED = 2;

    uint256 private _status;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    constructor() {
        _status = NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

        // Any calls to nonReentrant after this point will fail
        _status = ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == ENTERED;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/introspection/ERC165Checker.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Library used to query support of an interface declared via {IERC165}.
 *
 * Note that these functions return the actual result of the query: they do not
 * `revert` if an interface is not supported. It is up to the caller to decide
 * what to do in these cases.
 */
library ERC165Checker {
    // As per the EIP-165 spec, no interface should ever match 0xffffffff
    bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;

    /**
     * @dev Returns true if `account` supports the {IERC165} interface.
     */
    function supportsERC165(address account) internal view returns (bool) {
        // Any contract that implements ERC165 must explicitly indicate support of
        // InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
        return
            supportsERC165InterfaceUnchecked(account, type(IERC165).interfaceId) &&
            !supportsERC165InterfaceUnchecked(account, _INTERFACE_ID_INVALID);
    }

    /**
     * @dev Returns true if `account` supports the interface defined by
     * `interfaceId`. Support for {IERC165} itself is queried automatically.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
        // query support of both ERC165 as per the spec and support of _interfaceId
        return supportsERC165(account) && supportsERC165InterfaceUnchecked(account, interfaceId);
    }

    /**
     * @dev Returns a boolean array where each value corresponds to the
     * interfaces passed in and whether they're supported or not. This allows
     * you to batch check interfaces for a contract where your expectation
     * is that some interfaces may not be supported.
     *
     * See {IERC165-supportsInterface}.
     *
     * _Available since v3.4._
     */
    function getSupportedInterfaces(
        address account,
        bytes4[] memory interfaceIds
    ) internal view returns (bool[] memory) {
        // an array of booleans corresponding to interfaceIds and whether they're supported or not
        bool[] memory interfaceIdsSupported = new bool[](interfaceIds.length);

        // query support of ERC165 itself
        if (supportsERC165(account)) {
            // query support of each interface in interfaceIds
            for (uint256 i = 0; i < interfaceIds.length; i++) {
                interfaceIdsSupported[i] = supportsERC165InterfaceUnchecked(account, interfaceIds[i]);
            }
        }

        return interfaceIdsSupported;
    }

    /**
     * @dev Returns true if `account` supports all the interfaces defined in
     * `interfaceIds`. Support for {IERC165} itself is queried automatically.
     *
     * Batch-querying can lead to gas savings by skipping repeated checks for
     * {IERC165} support.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
        // query support of ERC165 itself
        if (!supportsERC165(account)) {
            return false;
        }

        // query support of each interface in interfaceIds
        for (uint256 i = 0; i < interfaceIds.length; i++) {
            if (!supportsERC165InterfaceUnchecked(account, interfaceIds[i])) {
                return false;
            }
        }

        // all interfaces supported
        return true;
    }

    /**
     * @notice Query if a contract implements an interface, does not check ERC165 support
     * @param account The address of the contract to query for support of an interface
     * @param interfaceId The interface identifier, as specified in ERC-165
     * @return true if the contract at account indicates support of the interface with
     * identifier interfaceId, false otherwise
     * @dev Assumes that account contains a contract that supports ERC165, otherwise
     * the behavior of this method is undefined. This precondition can be checked
     * with {supportsERC165}.
     *
     * Some precompiled contracts will falsely indicate support for a given interface, so caution
     * should be exercised when using this function.
     *
     * Interface identification is specified in ERC-165.
     */
    function supportsERC165InterfaceUnchecked(address account, bytes4 interfaceId) internal view returns (bool) {
        // prepare call
        bytes memory encodedParams = abi.encodeWithSelector(IERC165.supportsInterface.selector, interfaceId);

        // perform static call
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly {
            success := staticcall(30000, account, add(encodedParams, 0x20), mload(encodedParams), 0x00, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0x00)
        }

        return success && returnSize >= 0x20 && returnValue > 0;
    }
}

// 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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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 `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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`.
     *
     * 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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev _Available since v3.1._
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

    /**
     * @dev Handles the receipt of a multiple ERC1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(
        address[] calldata accounts,
        uint256[] calldata ids
    ) external view returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

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

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"contract IERC20","name":"_xen","type":"address"},{"internalType":"contract IERC20","name":"_dxn","type":"address"},{"internalType":"address","name":"_dxnBuyBurn","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ReentrancyGuardReentrantCall","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"orderIndex","type":"uint256"},{"components":[{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"address","name":"seller","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"supply","type":"uint256"},{"internalType":"enum IMastodonMarketplace.PayoutToken","name":"payoutToken","type":"uint8"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"enum IMastodonMarketplace.AssetClass","name":"assetClass","type":"uint8"}],"indexed":false,"internalType":"struct IMastodonMarketplace.Order","name":"order","type":"tuple"}],"name":"Buy","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"orderIndex","type":"uint256"},{"components":[{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"address","name":"seller","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"supply","type":"uint256"},{"internalType":"enum IMastodonMarketplace.PayoutToken","name":"payoutToken","type":"uint8"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"enum IMastodonMarketplace.AssetClass","name":"assetClass","type":"uint8"}],"indexed":false,"internalType":"struct IMastodonMarketplace.Order","name":"order","type":"tuple"}],"name":"Delist","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"orderIndex","type":"uint256"},{"components":[{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"address","name":"seller","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"supply","type":"uint256"},{"internalType":"enum IMastodonMarketplace.PayoutToken","name":"payoutToken","type":"uint8"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"enum IMastodonMarketplace.AssetClass","name":"assetClass","type":"uint8"}],"indexed":false,"internalType":"struct IMastodonMarketplace.Order","name":"order","type":"tuple"}],"name":"List","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"orderIndex","type":"uint256"},{"components":[{"internalType":"enum IMastodonMarketplace.PayoutToken","name":"payoutToken","type":"uint8"},{"internalType":"uint256","name":"newPrice","type":"uint256"}],"indexed":false,"internalType":"struct IMastodonMarketplace.Price","name":"newPrice","type":"tuple"}],"name":"NewPrice","type":"event"},{"inputs":[],"name":"acceptDxnBuyBurn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"listIndexes","type":"uint256[]"}],"name":"batchBuy","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"listIndexes","type":"uint256[]"},{"components":[{"internalType":"enum IMastodonMarketplace.PayoutToken","name":"payoutToken","type":"uint8"},{"internalType":"uint256","name":"newPrice","type":"uint256"}],"internalType":"struct IMastodonMarketplace.Price[]","name":"newPrices","type":"tuple[]"}],"name":"batchChangePrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"listIndexes","type":"uint256[]"}],"name":"batchDelist","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"supply","type":"uint256"},{"internalType":"enum IMastodonMarketplace.PayoutToken","name":"payoutToken","type":"uint8"},{"internalType":"uint256","name":"price","type":"uint256"}],"internalType":"struct IMastodonMarketplace.InputOrder[]","name":"inputOrders","type":"tuple[]"}],"name":"batchList","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"dev","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"dxn","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"dxnBuyBurn","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"globalIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isOwned","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256[]","name":"ids","type":"uint256[]"},{"internalType":"uint256[]","name":"values","type":"uint256[]"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"onERC1155BatchReceived","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"onERC1155Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"listIndex","type":"uint256"}],"name":"orders","outputs":[{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"address","name":"seller","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"supply","type":"uint256"},{"internalType":"enum IMastodonMarketplace.PayoutToken","name":"payoutToken","type":"uint8"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"enum IMastodonMarketplace.AssetClass","name":"assetClass","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingDxnBuyBurn","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceDxnBuyBurnOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_dxnBuyBurn","type":"address"}],"name":"setPendingDxnBuyBurn","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":"timeThreshold","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"xen","outputs":[{"internalType":"contract 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00000000000000000000000006450dee7fd2fb8e39061434babcfc05599a6fb800000000000000000000000080f0c1c49891dcfdd40b6e0f960f84e6042bcb6f0000000000000000000000008ff4596cdad4f8b1e1efac1592a5b7b586bc5ef3

-----Decoded View---------------
Arg [0] : _xen (address): 0x06450dEe7FD2Fb8E39061434BAbCFC05599a6Fb8
Arg [1] : _dxn (address): 0x80f0C1c49891dcFDD40b6e0F960F84E6042bcB6F
Arg [2] : _dxnBuyBurn (address): 0x8ff4596Cdad4F8B1e1eFaC1592a5B7b586BC5eF3

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000006450dee7fd2fb8e39061434babcfc05599a6fb8
Arg [1] : 00000000000000000000000080f0c1c49891dcfdd40b6e0f960f84e6042bcb6f
Arg [2] : 0000000000000000000000008ff4596cdad4f8b1e1efac1592a5b7b586bc5ef3