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//SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

import '@openzeppelin/contracts/access/Ownable.sol';
import '@openzeppelin/contracts/utils/Strings.sol';

import '../NiftyForge/INiftyForge721.sol';
import '../NiftyForge/Modules/NFBaseModule.sol';
import '../NiftyForge/Modules/INFModuleTokenURI.sol';
import '../NiftyForge/Modules/INFModuleRenderTokenURI.sol';
import '../NiftyForge/Modules/INFModuleWithRoyalties.sol';

import '../v2/AstragladeUpgrade.sol';

import '../ERC2981/IERC2981Royalties.sol';

import '../libraries/Randomize.sol';
import '../libraries/Base64.sol';

/// @title PlanetsModule
/// @author Simon Fremaux (@dievardump)
contract PlanetsModule is
    Ownable,
    NFBaseModule,
    INFModuleTokenURI,
    INFModuleRenderTokenURI,
    INFModuleWithRoyalties
{
    // using ECDSA for bytes32;
    using Strings for uint256;
    using Randomize for Randomize.Random;

    uint256 constant SEED_BOUND = 1000000000;

    // emitted when planets are claimed
    event PlanetsClaimed(uint256[] tokenIds);

    // contract actually holding the planets
    address public planetsContract;

    // astraglade contract to claim ids from
    address public astragladeContract;

    // contract operator next to the owner
    address public contractOperator =
        address(0xD1edDfcc4596CC8bD0bd7495beaB9B979fc50336);

    // project base render URI
    string private _baseRenderURI;

    // whenever all images are uploaded on arweave/ipfs and
    // this flag allows to stop all update of images, scripts etc...
    bool public frozenMeta;

    // base image rendering URI
    // before all Planets are minted, images will be stored on our servers since
    // they need to be generated after minting
    // after all planets are minted, they will all be stored in a decentralized way
    // and the _baseImagesURI will be updated
    string private _baseImagesURI;

    // project description
    string internal _description;

    address[3] public feeRecipients = [
        0xe4657aF058E3f844919c3ee713DF09c3F2949447,
        0xb275E5aa8011eA32506a91449B190213224aEc1e,
        0xdAC81C3642b520584eD0E743729F238D1c350E62
    ];

    mapping(uint256 => bytes32) public planetSeed;

    // saving already taken seeds to ensure not reusing a seed
    mapping(uint256 => bool) public seedTaken;

    modifier onlyOperator() {
        require(isOperator(msg.sender), 'Not operator.');
        _;
    }

    function isOperator(address operator) public view returns (bool) {
        return owner() == operator || contractOperator == operator;
    }

    /// @dev Receive, for royalties
    receive() external payable {}

    /// @notice constructor
    /// @param contractURI_ The contract URI (containing its metadata) - can be empty ""
    /// @param owner_ Address to whom transfer ownership (can be address(0), then owner is deployer)
    /// @param astragladeContract_ the contract holding the astraglades
    constructor(
        string memory contractURI_,
        address owner_,
        address planetsContract_,
        address astragladeContract_
    ) NFBaseModule(contractURI_) {
        planetsContract = planetsContract_;
        astragladeContract = astragladeContract_;

        if (address(0) != owner_) {
            transferOwnership(owner_);
        }
    }

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override
        returns (bool)
    {
        return
            interfaceId == type(INFModuleTokenURI).interfaceId ||
            interfaceId == type(INFModuleRenderTokenURI).interfaceId ||
            interfaceId == type(INFModuleWithRoyalties).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /// @inheritdoc	INFModuleWithRoyalties
    function royaltyInfo(uint256 tokenId)
        public
        view
        override
        returns (address, uint256)
    {
        return royaltyInfo(msg.sender, tokenId);
    }

    /// @inheritdoc	INFModuleWithRoyalties
    function royaltyInfo(address, uint256)
        public
        view
        override
        returns (address receiver, uint256 basisPoint)
    {
        receiver = address(this);
        basisPoint = 1000;
    }

    /// @inheritdoc	INFModuleTokenURI
    function tokenURI(uint256 tokenId)
        public
        view
        override
        returns (string memory)
    {
        return tokenURI(msg.sender, tokenId);
    }

    /// @inheritdoc	INFModuleTokenURI
    function tokenURI(address, uint256 tokenId)
        public
        view
        override
        returns (string memory)
    {
        (
            uint256 seed,
            uint256 astragladeSeed,
            uint256[] memory attributes
        ) = getPlanetData(tokenId);

        return
            string(
                abi.encodePacked(
                    'data:application/json;base64,',
                    Base64.encode(
                        abi.encodePacked(
                            '{"name":"Planet - ',
                            tokenId.toString(),
                            '","license":"CC BY-SA 4.0","description":"',
                            getDescription(),
                            '","created_by":"Fabin Rasheed","twitter":"@astraglade","image":"',
                            abi.encodePacked(
                                getBaseImageURI(),
                                tokenId.toString()
                            ),
                            '","seed":"',
                            seed.toString(),
                            abi.encodePacked(
                                '","astragladeSeed":"',
                                astragladeSeed.toString(),
                                '","attributes":[',
                                _generateJSONAttributes(attributes),
                                '],"animation_url":"',
                                _renderTokenURI(
                                    seed,
                                    astragladeSeed,
                                    attributes
                                ),
                                '"}'
                            )
                        )
                    )
                )
            );
    }

    /// @notice function that returns a string that can be used to render the current token
    /// @param tokenId tokenId
    /// @return the URI to render token
    function renderTokenURI(uint256 tokenId)
        public
        view
        override
        returns (string memory)
    {
        return renderTokenURI(msg.sender, tokenId);
    }

    /// @notice function that returns a string that can be used to render the current token
    /// @param tokenId tokenId
    /// @return the URI to render token
    function renderTokenURI(address, uint256 tokenId)
        public
        view
        override
        returns (string memory)
    {
        (
            uint256 seed,
            uint256 astragladeSeed,
            uint256[] memory attributes
        ) = getPlanetData(tokenId);

        return _renderTokenURI(seed, astragladeSeed, attributes);
    }

    /// @notice Helper returning all data for a Planet
    /// @param tokenId the planet id
    /// @return the planet seed, the astraglade seed and the planet attributes (the integer form)
    function getPlanetData(uint256 tokenId)
        public
        view
        returns (
            uint256,
            uint256,
            uint256[] memory
        )
    {
        require(planetSeed[tokenId] != 0, '!UNKNOWN_TOKEN!');

        uint256 seed = uint256(planetSeed[tokenId]) % SEED_BOUND;
        uint256[] memory attributes = _getAttributes(seed);

        AstragladeUpgrade.AstragladeMeta memory astraglade = AstragladeUpgrade(
            payable(astragladeContract)
        ).getAstraglade(tokenId);

        return (seed, astraglade.seed, attributes);
    }

    /// @notice Returns Metadata for Astraglade id
    /// @param tokenId the tokenId we want metadata for
    function getAstraglade(uint256 tokenId)
        public
        view
        returns (AstragladeUpgrade.AstragladeMeta memory astraglade)
    {
        return
            AstragladeUpgrade(payable(astragladeContract)).getAstraglade(
                tokenId
            );
    }

    /// @notice helper to get the description
    function getDescription() public view returns (string memory) {
        if (bytes(_description).length == 0) {
            return
                "Astraglade Planets is an extension of project Astraglade (https://nurecas.com/astraglade). Planets are an interactive and generative 3D art that can be minted for free by anyone who owns an astraglade at [https://astraglade.beyondnft.io/planets/](https://astraglade.beyondnft.io/planets/). When a Planet is minted, the owner's astraglade will orbit forever around the planet that they mint.";
        }

        return _description;
    }

    /// @notice helper to get the baseRenderURI
    function getBaseRenderURI() public view returns (string memory) {
        if (bytes(_baseRenderURI).length == 0) {
            return 'ar://JYtFvtxlpyur2Cdpaodmo46XzuTpmp0OwJl13rFUrrg/';
        }

        return _baseRenderURI;
    }

    /// @notice helper to get the baseImageURI
    function getBaseImageURI() public view returns (string memory) {
        if (bytes(_baseImagesURI).length == 0) {
            return 'https://astraglade-api.beyondnft.io/planets/images/';
        }

        return _baseImagesURI;
    }

    /// @inheritdoc	INFModule
    function onAttach()
        external
        virtual
        override(INFModule, NFBaseModule)
        returns (bool)
    {
        // only the first attach is accepted, saves a "setPlanetsContract" call
        if (planetsContract == address(0)) {
            planetsContract = msg.sender;
            return true;
        }

        return false;
    }

    /// @notice Claim tokenIds[] from the astraglade contract
    /// @param tokenIds the tokenIds to claim
    function claim(uint256[] calldata tokenIds) external {
        address operator = msg.sender;

        // saves some reads
        address astragladeContract_ = astragladeContract;
        address planetsContract_ = planetsContract;

        for (uint256 i; i < tokenIds.length; i++) {
            _claim(
                operator,
                tokenIds[i],
                astragladeContract_,
                planetsContract_
            );
        }
    }

    /// @notice Allows to freeze any metadata update
    function freezeMeta() external onlyOperator {
        frozenMeta = true;
    }

    /// @notice sets contract uri
    /// @param newURI the new uri
    function setContractURI(string memory newURI) external onlyOperator {
        _setContractURI(newURI);
    }

    /// @notice sets planets contract
    /// @param planetsContract_ the contract containing planets
    function setPlanetsContract(address planetsContract_)
        external
        onlyOperator
    {
        planetsContract = planetsContract_;
    }

    /// @notice helper to set the description
    /// @param newDescription the new description
    function setDescription(string memory newDescription)
        external
        onlyOperator
    {
        require(frozenMeta == false, '!META_FROZEN!');
        _description = newDescription;
    }

    /// @notice helper to set the baseRenderURI
    /// @param newRenderURI the new renderURI
    function setBaseRenderURI(string memory newRenderURI)
        external
        onlyOperator
    {
        require(frozenMeta == false, '!META_FROZEN!');
        _baseRenderURI = newRenderURI;
    }

    /// @notice helper to set the baseImageURI
    /// @param newBaseImagesURI the new base image URI
    function setBaseImagesURI(string memory newBaseImagesURI)
        external
        onlyOperator
    {
        require(frozenMeta == false, '!META_FROZEN!');
        _baseImagesURI = newBaseImagesURI;
    }

    /// @dev Owner withdraw balance function
    function withdraw() external onlyOperator {
        address[3] memory feeRecipients_ = feeRecipients;

        uint256 balance_ = address(this).balance;
        payable(address(feeRecipients_[0])).transfer((balance_ * 30) / 100);
        payable(address(feeRecipients_[1])).transfer((balance_ * 35) / 100);
        payable(address(feeRecipients_[2])).transfer(address(this).balance);
    }

    /// @notice helper to set the fee recipient at `index`
    /// @param newFeeRecipient the new address
    /// @param index the index to edit
    function setFeeRecipient(address newFeeRecipient, uint8 index)
        external
        onlyOperator
    {
        require(index < feeRecipients.length, '!INDEX_OVERFLOW!');
        require(newFeeRecipient != address(0), '!INVALID_ADDRESS!');

        feeRecipients[index] = newFeeRecipient;
    }

    /// @notice Helper for an operator to change the current operator address
    /// @param newOperator the new operator
    function setContractOperator(address newOperator) external onlyOperator {
        contractOperator = newOperator;
    }

    /// @dev Allows to claim a tokenId; the Planet will always be minted to the owner of the Astraglade
    /// @param operator the one launching the claim (needs to be owner or approved on the Astraglade)
    /// @param tokenId the Astraglade tokenId to claim
    /// @param astragladeContract_ the Astraglade contract to check ownership
    /// @param planetsContract_ the Planet contract (where to mint the tokens)
    function _claim(
        address operator,
        uint256 tokenId,
        address astragladeContract_,
        address planetsContract_
    ) internal {
        AstragladeUpgrade astraglade = AstragladeUpgrade(
            payable(astragladeContract_)
        );
        address owner_ = astraglade.ownerOf(tokenId);

        // verify that the operator has the right to claim
        require(
            owner_ == operator ||
                astraglade.isApprovedForAll(owner_, operator) ||
                astraglade.getApproved(tokenId) == operator,
            '!NOT_AUTHORIZED!'
        );

        // mint
        INiftyForge721 planets = INiftyForge721(planetsContract_);

        // always mint to owner_, not to operator
        planets.mint(owner_, '', tokenId, address(0), 0, address(0));

        // creates a seed
        bytes32 seed;
        do {
            seed = _generateSeed(
                tokenId,
                block.timestamp,
                owner_,
                blockhash(block.number - 1)
            );
        } while (seedTaken[uint256(seed) % SEED_BOUND]);

        planetSeed[tokenId] = seed;
        // ensure we won't have two seeds rendering the same planet
        seedTaken[uint256(seed) % SEED_BOUND] = true;
    }

    /// @dev Calculate next seed using a few on chain data
    /// @param tokenId tokenId
    /// @param timestamp current block timestamp
    /// @param operator current operator
    /// @param blockHash last block hash
    /// @return a new bytes32 seed
    function _generateSeed(
        uint256 tokenId,
        uint256 timestamp,
        address operator,
        bytes32 blockHash
    ) internal view returns (bytes32) {
        return
            keccak256(
                abi.encodePacked(
                    tokenId,
                    timestamp,
                    operator,
                    blockHash,
                    block.coinbase,
                    block.difficulty,
                    tx.gasprice
                )
            );
    }

    /// @notice generates the attributes values according to seed
    /// @param seed the seed to generate the values
    /// @return attributes an array of attributes (integers)
    function _getAttributes(uint256 seed)
        internal
        pure
        returns (uint256[] memory attributes)
    {
        Randomize.Random memory random = Randomize.Random({seed: seed});

        // remember, all numbers returned by randomBetween are
        // multiplicated by 1000, because solidity has no decimals
        // so we will divide all those numbers later
        attributes = new uint256[](6);

        // density
        attributes[0] = random.randomBetween(10, 200);

        // radius
        attributes[1] = random.randomBetween(5, 15);

        // cube planet
        attributes[2] = random.randomBetween(0, 5000);
        if (attributes[2] < 20000) {
            // set radius = 10 if cube
            attributes[1] = 10000;
        }

        // shade - remember to actually change 1 into -1 in the HTML
        attributes[3] = random.randomBetween(0, 2) < 1000 ? 0 : 1;

        // rings
        // if cube, 2 or 3 rings
        if (attributes[2] < 20000) {
            attributes[4] = random.randomBetween(2, 4) / 1000;
        } else {
            // else 30% chances to have rings (1, 2 and 3)
            attributes[4] = random.randomBetween(0, 10) / 1000;
            // if more than 3, then none.
            if (attributes[4] > 3) {
                attributes[4] = 0;
            }
        }

        // moons, 0, 1, 2 or 3
        attributes[5] = random.randomBetween(0, 4) / 1000;
    }

    /// @notice Generates the JSON string from the attributes values
    /// @param attributes the attributes values
    /// @return jsonAttributes, the string for attributes
    function _generateJSONAttributes(uint256[] memory attributes)
        internal
        pure
        returns (string memory)
    {
        bytes memory coma = bytes(',');

        // Terrain
        bytes memory jsonAttributes = abi.encodePacked(
            _makeAttributes(
                'Terrain',
                attributes[0] < 50000 ? 'Dense' : 'Sparse'
            ),
            coma
        );

        // Size
        if (attributes[1] < 8000) {
            jsonAttributes = abi.encodePacked(
                jsonAttributes,
                _makeAttributes('Size', 'Tiny'),
                coma
            );
        } else if (attributes[1] < 12000) {
            jsonAttributes = abi.encodePacked(
                jsonAttributes,
                _makeAttributes('Size', 'Medium'),
                coma
            );
        } else {
            jsonAttributes = abi.encodePacked(
                jsonAttributes,
                _makeAttributes('Size', 'Giant'),
                coma
            );
        }

        // Form
        jsonAttributes = abi.encodePacked(
            jsonAttributes,
            _makeAttributes(
                'Form',
                attributes[2] < 20000 ? 'Tesseract' : 'Geo'
            ),
            coma,
            _makeAttributes('Shade', attributes[3] == 0 ? 'Vibrant' : 'Simple'),
            coma,
            _makeAttributes('Rings', attributes[4].toString()),
            coma,
            _makeAttributes('Moons', attributes[5].toString())
        );

        return string(jsonAttributes);
    }

    function _makeAttributes(string memory name_, string memory value)
        internal
        pure
        returns (bytes memory)
    {
        return
            abi.encodePacked(
                '{"trait_type":"',
                name_,
                '","value":"',
                value,
                '"}'
            );
    }

    /// @notice returns the URL to render the Planet
    /// @param seed the planet seed
    /// @param astragladeSeed the astraglade seed
    /// @param attributes all attributes needed for the planets
    /// @return the URI to render the planet
    function _renderTokenURI(
        uint256 seed,
        uint256 astragladeSeed,
        uint256[] memory attributes
    ) internal view returns (string memory) {
        bytes memory coma = bytes(',');

        bytes memory attrs = abi.encodePacked(
            attributes[0].toString(),
            coma,
            attributes[1].toString(),
            coma,
            attributes[2].toString(),
            coma
        );

        return
            string(
                abi.encodePacked(
                    getBaseRenderURI(),
                    '?seed=',
                    seed.toString(),
                    '&astragladeSeed=',
                    astragladeSeed.toString(),
                    '&attributes=',
                    abi.encodePacked(
                        attrs,
                        attributes[3].toString(),
                        coma,
                        attributes[4].toString(),
                        coma,
                        attributes[5].toString()
                    )
                )
            );
    }
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to owner address
    mapping(uint256 => address) private _owners;

    // Mapping owner address to token count
    mapping(address => uint256) private _balances;

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

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

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

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

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: balance query for the zero address");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");
        return owner;
    }

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

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

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

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

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

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not owner nor approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

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

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

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");

        _transfer(from, to, tokenId);
    }

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

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
        _safeTransfer(from, to, tokenId, _data);
    }

    /**
     * @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.
     *
     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _owners[tokenId] != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
        address owner = ERC721.ownerOf(tokenId);
        return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal virtual {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _mint(to, tokenId);
        require(
            _checkOnERC721Received(address(0), to, tokenId, _data),
            "ERC721: transfer to non ERC721Receiver implementer"
        );
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId);

        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(address(0), to, tokenId);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId);

        // Clear approvals
        _approve(address(0), tokenId);

        _balances[owner] -= 1;
        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId);

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

        _balances[from] -= 1;
        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits a {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                return retval == IERC721Receiver.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, ``from``'s `tokenId` will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
}

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

pragma solidity ^0.8.0;

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

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Burnable.sol)

pragma solidity ^0.8.0;

import "../ERC721.sol";
import "../../../utils/Context.sol";

/**
 * @title ERC721 Burnable Token
 * @dev ERC721 Token that can be irreversibly burned (destroyed).
 */
abstract contract ERC721Burnable is Context, ERC721 {
    /**
     * @dev Burns `tokenId`. See {ERC721-_burn}.
     *
     * Requirements:
     *
     * - The caller must own `tokenId` or be an approved operator.
     */
    function burn(uint256 tokenId) public virtual {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved");
        _burn(tokenId);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../ERC721.sol";
import "./IERC721Enumerable.sol";

/**
 * @dev This implements an optional extension of {ERC721} defined in the EIP that adds
 * enumerability of all the token ids in the contract as well as all token ids owned by each
 * account.
 */
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
    // Mapping from owner to list of owned token IDs
    mapping(address => mapping(uint256 => uint256)) private _ownedTokens;

    // Mapping from token ID to index of the owner tokens list
    mapping(uint256 => uint256) private _ownedTokensIndex;

    // Array with all token ids, used for enumeration
    uint256[] private _allTokens;

    // Mapping from token id to position in the allTokens array
    mapping(uint256 => uint256) private _allTokensIndex;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
        return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
        return _ownedTokens[owner][index];
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _allTokens.length;
    }

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     */
    function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
        return _allTokens[index];
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, ``from``'s `tokenId` will be burned.
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual override {
        super._beforeTokenTransfer(from, to, tokenId);

        if (from == address(0)) {
            _addTokenToAllTokensEnumeration(tokenId);
        } else if (from != to) {
            _removeTokenFromOwnerEnumeration(from, tokenId);
        }
        if (to == address(0)) {
            _removeTokenFromAllTokensEnumeration(tokenId);
        } else if (to != from) {
            _addTokenToOwnerEnumeration(to, tokenId);
        }
    }

    /**
     * @dev Private function to add a token to this extension's ownership-tracking data structures.
     * @param to address representing the new owner of the given token ID
     * @param tokenId uint256 ID of the token to be added to the tokens list of the given address
     */
    function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
        uint256 length = ERC721.balanceOf(to);
        _ownedTokens[to][length] = tokenId;
        _ownedTokensIndex[tokenId] = length;
    }

    /**
     * @dev Private function to add a token to this extension's token tracking data structures.
     * @param tokenId uint256 ID of the token to be added to the tokens list
     */
    function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
        _allTokensIndex[tokenId] = _allTokens.length;
        _allTokens.push(tokenId);
    }

    /**
     * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
     * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
     * gas optimizations e.g. when performing a transfer operation (avoiding double writes).
     * This has O(1) time complexity, but alters the order of the _ownedTokens array.
     * @param from address representing the previous owner of the given token ID
     * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
     */
    function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
        // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
        uint256 tokenIndex = _ownedTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary
        if (tokenIndex != lastTokenIndex) {
            uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];

            _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
            _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
        }

        // This also deletes the contents at the last position of the array
        delete _ownedTokensIndex[tokenId];
        delete _ownedTokens[from][lastTokenIndex];
    }

    /**
     * @dev Private function to remove a token from this extension's token tracking data structures.
     * This has O(1) time complexity, but alters the order of the _allTokens array.
     * @param tokenId uint256 ID of the token to be removed from the tokens list
     */
    function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
        // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = _allTokens.length - 1;
        uint256 tokenIndex = _allTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
        // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
        // an 'if' statement (like in _removeTokenFromOwnerEnumeration)
        uint256 lastTokenId = _allTokens[lastTokenIndex];

        _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
        _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index

        // This also deletes the contents at the last position of the array
        delete _allTokensIndex[tokenId];
        _allTokens.pop();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

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

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

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

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

pragma solidity ^0.8.0;

import "../IERC721.sol";

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

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

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

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

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

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

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

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

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

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

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

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

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

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

pragma solidity ^0.8.0;

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "../Strings.sol";

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

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

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

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

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

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

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

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

        return (signer, RecoverError.NoError);
    }

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

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

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

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

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

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

// 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 v4.4.1 (utils/structs/EnumerableSet.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastvalue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastvalue;
                // Update the index for the moved value
                set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        return _values(set._inner);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        assembly {
            result := store
        }

        return result;
    }
}

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

/// @title IERC2981Royalties
/// @dev Interface for the ERC2981 - Token Royalty standard
interface IERC2981Royalties {
    /// @notice Called with the sale price to determine how much royalty
    //          is owed and to whom.
    /// @param _tokenId - the NFT asset queried for royalty information
    /// @param _value - the sale price of the NFT asset specified by _tokenId
    /// @return _receiver - address of who should be sent the royalty payment
    /// @return _royaltyAmount - the royalty payment amount for value sale price
    function royaltyInfo(uint256 _tokenId, uint256 _value)
        external
        view
        returns (address _receiver, uint256 _royaltyAmount);
}

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

import '@openzeppelin/contracts/access/Ownable.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol';

import './OpenSea/BaseOpenSea.sol';

/// @title ERC721Ownable
/// @author Simon Fremaux (@dievardump)
contract ERC721Ownable is Ownable, ERC721Enumerable, BaseOpenSea {
    /// @notice constructor
    /// @param name_ name of the contract (see ERC721)
    /// @param symbol_ symbol of the contract (see ERC721)
    /// @param contractURI_ The contract URI (containing its metadata) - can be empty ""
    /// @param openseaProxyRegistry_ OpenSea's proxy registry to allow gas-less listings - can be address(0)
    /// @param owner_ Address to whom transfer ownership (can be address(0), then owner is deployer)
    constructor(
        string memory name_,
        string memory symbol_,
        string memory contractURI_,
        address openseaProxyRegistry_,
        address owner_
    ) ERC721(name_, symbol_) {
        // set contract uri if present
        if (bytes(contractURI_).length > 0) {
            _setContractURI(contractURI_);
        }

        // set OpenSea proxyRegistry for gas-less trading if present
        if (address(0) != openseaProxyRegistry_) {
            _setOpenSeaRegistry(openseaProxyRegistry_);
        }

        // transferOwnership if needed
        if (address(0) != owner_) {
            transferOwnership(owner_);
        }
    }

    /// @notice Allows to burn a tokenId
    /// @dev Burns `tokenId`. See {ERC721-_burn}.  The caller must own `tokenId` or be an approved operator.
    /// @param tokenId the tokenId to burn
    function burn(uint256 tokenId) public virtual {
        require(
            _isApprovedOrOwner(_msgSender(), tokenId),
            'ERC721Burnable: caller is not owner nor approved'
        );
        _burn(tokenId);
    }

    /// @notice Allows gas-less trading on OpenSea by safelisting the Proxy of the user
    /// @dev Override isApprovedForAll to check first if current operator is owner's OpenSea proxy
    /// @inheritdoc	ERC721
    function isApprovedForAll(address owner, address operator)
        public
        view
        override
        returns (bool)
    {
        // allows gas less trading on OpenSea
        if (isOwnersOpenSeaProxy(owner, operator)) {
            return true;
        }

        return super.isApprovedForAll(owner, operator);
    }

    /// @notice Helper for the owner of the contract to set the new contract URI
    /// @dev needs to be owner
    /// @param contractURI_ new contract URI
    function setContractURI(string memory contractURI_) external onlyOwner {
        _setContractURI(contractURI_);
    }
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

/// @title INiftyForge721
/// @author Simon Fremaux (@dievardump)
interface INiftyForge721 {
    struct ModuleInit {
        address module;
        bool enabled;
        bool minter;
    }

    /// @notice totalSupply access
    function totalSupply() external view returns (uint256);

    /// @notice helper to know if everyone can mint or only minters
    function isMintingOpenToAll() external view returns (bool);

    /// @notice Toggle minting open to all state
    /// @param isOpen if the new state is open or not
    function setMintingOpenToAll(bool isOpen) external;

    /// @notice Mint token to `to` with `uri`
    /// @param to address of recipient
    /// @param uri token metadata uri
    /// @param feeRecipient the recipient of royalties
    /// @param feeAmount the royalties amount. From 0 to 10000
    ///        where 10000 == 100.00%; 1000 == 10.00%; 250 == 2.50%
    /// @param transferTo the address to transfer the NFT to after mint
    ///        this is used when we want to mint the NFT to the creator address
    ///        before transferring it to a recipient
    /// @return tokenId the tokenId
    function mint(
        address to,
        string memory uri,
        address feeRecipient,
        uint256 feeAmount,
        address transferTo
    ) external returns (uint256 tokenId);

    /// @notice Mint batch tokens to `to[i]` with `uri[i]`
    /// @param to array of address of recipients
    /// @param uris array of token metadata uris
    /// @param feeRecipients the recipients of royalties for each id
    /// @param feeAmounts the royalties amounts for each id. From 0 to 10000
    ///        where 10000 == 100.00%; 1000 == 10.00%; 250 == 2.50%
    /// @return tokenIds the tokenIds
    function mintBatch(
        address[] memory to,
        string[] memory uris,
        address[] memory feeRecipients,
        uint256[] memory feeAmounts
    ) external returns (uint256[] memory tokenIds);

    /// @notice Mint `tokenId` to to` with `uri`
    ///         Because not all tokenIds have incremental ids
    ///         be careful with this function, it does not increment lastTokenId
    ///         and expects the minter to actually know what it is doing.
    ///         this also means, this function does not verify _maxTokenId
    /// @param to address of recipient
    /// @param uri token metadata uri
    /// @param tokenId token id wanted
    /// @param feeRecipient the recipient of royalties
    /// @param feeAmount the royalties amount. From 0 to 10000
    ///        where 10000 == 100.00%; 1000 == 10.00%; 250 == 2.50%
    /// @param transferTo the address to transfer the NFT to after mint
    ///        this is used when we want to mint the NFT to the creator address
    ///        before transferring it to a recipient
    /// @return tokenId the tokenId
    function mint(
        address to,
        string memory uri,
        uint256 tokenId_,
        address feeRecipient,
        uint256 feeAmount,
        address transferTo
    ) external returns (uint256 tokenId);

    /// @notice Mint batch tokens to `to[i]` with `uris[i]`
    ///         Because not all tokenIds have incremental ids
    ///         be careful with this function, it does not increment lastTokenId
    ///         and expects the minter to actually know what it's doing.
    ///         this also means, this function does not verify _maxTokenId
    /// @param to array of address of recipients
    /// @param uris array of token metadata uris
    /// @param tokenIds array of token ids wanted
    /// @param feeRecipients the recipients of royalties for each id
    /// @param feeAmounts the royalties amounts for each id. From 0 to 10000
    ///        where 10000 == 100.00%; 1000 == 10.00%; 250 == 2.50%
    /// @return tokenIds the tokenIds
    function mintBatch(
        address[] memory to,
        string[] memory uris,
        uint256[] memory tokenIds,
        address[] memory feeRecipients,
        uint256[] memory feeAmounts
    ) external returns (uint256[] memory);

    /// @notice Attach a module
    /// @param module a module to attach
    /// @param enabled if the module is enabled by default
    /// @param canModuleMint if the module has to be given the minter role
    function attachModule(
        address module,
        bool enabled,
        bool canModuleMint
    ) external;

    /// @dev Allows owner to enable a module
    /// @param module to enable
    /// @param canModuleMint if the module has to be given the minter role
    function enableModule(address module, bool canModuleMint) external;

    /// @dev Allows owner to disable a module
    /// @param module to disable
    function disableModule(address module, bool keepListeners) external;

    /// @notice function that returns a string that can be used to render the current token
    /// @param tokenId tokenId
    /// @return the URI to render token
    function renderTokenURI(uint256 tokenId)
        external
        view
        returns (string memory);
}

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

import '@openzeppelin/contracts/utils/introspection/IERC165.sol';

interface INFModule is IERC165 {
    /// @notice Called by a Token Registry whenever the module is Attached
    /// @return if the attach worked
    function onAttach() external returns (bool);

    /// @notice Called by a Token Registry whenever the module is Enabled
    /// @return if the enabling worked
    function onEnable() external returns (bool);

    /// @notice Called by a Token Registry whenever the module is Disabled
    function onDisable() external;

    /// @notice returns an URI with information about the module
    /// @return the URI where to find information about the module
    function contractURI() external view returns (string memory);
}

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

import './INFModule.sol';

interface INFModuleRenderTokenURI is INFModule {
    function renderTokenURI(uint256 tokenId)
        external
        view
        returns (string memory);

    function renderTokenURI(address registry, uint256 tokenId)
        external
        view
        returns (string memory);
}

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

import './INFModule.sol';

interface INFModuleTokenURI is INFModule {
    function tokenURI(uint256 tokenId) external view returns (string memory);

    function tokenURI(address registry, uint256 tokenId)
        external
        view
        returns (string memory);
}

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

import './INFModule.sol';

interface INFModuleWithRoyalties is INFModule {
    /// @notice Return royalties (recipient, basisPoint) for tokenId
    /// @dev Contrary to EIP2981, modules are expected to return basisPoint for second parameters
    ///      This in order to allow right royalties on marketplaces not supporting 2981 (like Rarible)
    /// @param tokenId token to check
    /// @return recipient and basisPoint for this tokenId
    function royaltyInfo(uint256 tokenId)
        external
        view
        returns (address recipient, uint256 basisPoint);

    /// @notice Return royalties (recipient, basisPoint) for tokenId
    /// @dev Contrary to EIP2981, modules are expected to return basisPoint for second parameters
    ///      This in order to allow right royalties on marketplaces not supporting 2981 (like Rarible)
    /// @param registry registry to check id of
    /// @param tokenId token to check
    /// @return recipient and basisPoint for this tokenId
    function royaltyInfo(address registry, uint256 tokenId)
        external
        view
        returns (address recipient, uint256 basisPoint);
}

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

import '@openzeppelin/contracts/utils/structs/EnumerableSet.sol';
import '@openzeppelin/contracts/utils/introspection/ERC165.sol';
import './INFModule.sol';

/// @title NFBaseModule
/// @author Simon Fremaux (@dievardump)
contract NFBaseModule is INFModule, ERC165 {
    using EnumerableSet for EnumerableSet.AddressSet;

    EnumerableSet.AddressSet internal _attached;

    event NewContractURI(string contractURI);

    string private _contractURI;

    modifier onlyAttached(address registry) {
        require(_attached.contains(registry), '!NOT_ATTACHED!');
        _;
    }

    constructor(string memory contractURI_) {
        _setContractURI(contractURI_);
    }

    /// @inheritdoc	INFModule
    function contractURI()
        external
        view
        virtual
        override
        returns (string memory)
    {
        return _contractURI;
    }

    /// @inheritdoc	INFModule
    function onAttach() external virtual override returns (bool) {
        if (_attached.add(msg.sender)) {
            return true;
        }

        revert('!ALREADY_ATTACHED!');
    }

    /// @notice this contract doesn't really care if it's enabled or not
    ///         since trying to mint on a contract where it's not enabled will fail
    /// @inheritdoc	INFModule
    function onEnable() external pure virtual override returns (bool) {
        return true;
    }

    /// @inheritdoc	INFModule
    function onDisable() external virtual override {}

    function _setContractURI(string memory contractURI_) internal {
        _contractURI = contractURI_;
        emit NewContractURI(contractURI_);
    }
}

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

/// @title OpenSea contract helper that defines a few things
/// @author Simon Fremaux (@dievardump)
/// @dev This is a contract used to add OpenSea's support
contract BaseOpenSea {
    string private _contractURI;
    ProxyRegistry private _proxyRegistry;

    /// @notice Returns the contract URI function. Used on OpenSea to get details
    //          about a contract (owner, royalties etc...)
    function contractURI() public view returns (string memory) {
        return _contractURI;
    }

    /// @notice Helper for OpenSea gas-less trading
    /// @dev Allows to check if `operator` is owner's OpenSea proxy
    /// @param owner the owner we check for
    /// @param operator the operator (proxy) we check for
    function isOwnersOpenSeaProxy(address owner, address operator)
        public
        view
        returns (bool)
    {
        ProxyRegistry proxyRegistry = _proxyRegistry;
        return
            // we have a proxy registry address
            address(proxyRegistry) != address(0) &&
            // current operator is owner's proxy address
            address(proxyRegistry.proxies(owner)) == operator;
    }

    /// @dev Internal function to set the _contractURI
    /// @param contractURI_ the new contract uri
    function _setContractURI(string memory contractURI_) internal {
        _contractURI = contractURI_;
    }

    /// @dev Internal function to set the _proxyRegistry
    /// @param proxyRegistryAddress the new proxy registry address
    function _setOpenSeaRegistry(address proxyRegistryAddress) internal {
        _proxyRegistry = ProxyRegistry(proxyRegistryAddress);
    }
}

contract OwnableDelegateProxy {}

contract ProxyRegistry {
    mapping(address => OwnableDelegateProxy) public proxies;
}

pragma solidity ^0.8.0;

// SPDX-License-Identifier: MIT

/// @title Base64
/// @author Brecht Devos - <[email protected]>
/// @notice Provides a function for encoding some bytes in base64
library Base64 {
    string internal constant TABLE =
        'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';

    function encode(bytes memory data) internal pure returns (string memory) {
        if (data.length == 0) return '';

        // load the table into memory
        string memory table = TABLE;

        // multiply by 4/3 rounded up
        uint256 encodedLen = 4 * ((data.length + 2) / 3);

        // add some extra buffer at the end required for the writing
        string memory result = new string(encodedLen + 32);

        assembly {
            // set the actual output length
            mstore(result, encodedLen)

            // prepare the lookup table
            let tablePtr := add(table, 1)

            // input ptr
            let dataPtr := data
            let endPtr := add(dataPtr, mload(data))

            // result ptr, jump over length
            let resultPtr := add(result, 32)

            // run over the input, 3 bytes at a time
            for {

            } lt(dataPtr, endPtr) {

            } {
                dataPtr := add(dataPtr, 3)

                // read 3 bytes
                let input := mload(dataPtr)

                // write 4 characters
                mstore(
                    resultPtr,
                    shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F))))
                )
                resultPtr := add(resultPtr, 1)
                mstore(
                    resultPtr,
                    shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F))))
                )
                resultPtr := add(resultPtr, 1)
                mstore(
                    resultPtr,
                    shl(248, mload(add(tablePtr, and(shr(6, input), 0x3F))))
                )
                resultPtr := add(resultPtr, 1)
                mstore(
                    resultPtr,
                    shl(248, mload(add(tablePtr, and(input, 0x3F))))
                )
                resultPtr := add(resultPtr, 1)
            }

            // padding with '='
            switch mod(mload(data), 3)
            case 1 {
                mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
            }
            case 2 {
                mstore(sub(resultPtr, 1), shl(248, 0x3d))
            }
        }

        return result;
    }
}

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

// small library to randomize using (min, max, seed)
// all number returned are considered with 3 decimals
library Randomize {
    struct Random {
        uint256 seed;
    }

    /// @notice This function uses seed to return a pseudo random interger between 0 and 1000
    ///         Because solidity has no decimal points, the number is considered to be [0, 0.999]
    /// @param random the random seed
    /// @return the pseudo random number (with 3 decimal basis)
    function randomDec(Random memory random) internal pure returns (uint256) {
        random.seed ^= random.seed << 13;
        random.seed ^= random.seed >> 17;
        random.seed ^= random.seed << 5;
        return ((random.seed < 0 ? ~random.seed + 1 : random.seed) % 1000);
    }

    /// @notice return a number between [min, max[, multiplicated by 1000 (for 3 decimal basis)
    /// @param random the random seed
    /// @return the pseudo random number (with 3 decimal basis)
    function randomBetween(
        Random memory random,
        uint256 min,
        uint256 max
    ) internal pure returns (uint256) {
        return min * 1000 + (max - min) * Randomize.randomDec(random);
    }
}

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

import '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol';

import '@openzeppelin/contracts/utils/cryptography/ECDSA.sol';
import '@openzeppelin/contracts/utils/Strings.sol';

import '../ERC721Ownable.sol';
import '../ERC2981/IERC2981Royalties.sol';
import './IOldMetaHolder.sol';

/// @title AstragladeUpgrade
/// @author Simon Fremaux (@dievardump)
contract AstragladeUpgrade is
    IERC2981Royalties,
    ERC721Ownable,
    IERC721Receiver
{
    using ECDSA for bytes32;
    using Strings for uint256;

    // emitted when an Astraglade has been upgrade
    event AstragladeUpgraded(address indexed operator, uint256 indexed tokenId);

    // emitted when a token owner asks for a metadata update (image or signature)
    // because of rendering error
    event RequestUpdate(address indexed operator, uint256 indexed tokenId);

    struct MintingOrder {
        address to;
        uint256 expiration;
        uint256 seed;
        string signature;
        string imageHash;
    }

    struct AstragladeMeta {
        uint256 seed;
        string signature;
        string imageHash;
    }

    // start at the old contract last token Id minted
    uint256 public lastTokenId = 84;

    // signer that signs minting orders
    address public mintSigner;

    // how long before an order expires
    uint256 public expiration;

    // old astraglade contract to allow upgrade to new token
    address public oldAstragladeContract;

    // contract that holds metadata of previous contract Astraglades
    address public oldMetaHolder;

    // contract operator next to the owner
    address public contractOperator =
        address(0xD1edDfcc4596CC8bD0bd7495beaB9B979fc50336);

    // max supply
    uint256 constant MAX_SUPPLY = 5555;

    // price
    uint256 constant PRICE = 0.0888 ether;

    // project base render URI
    string private _baseRenderURI;

    // project description
    string internal _description;

    // list of Astraglades
    mapping(uint256 => AstragladeMeta) internal _astraglades;

    // saves if a minting order was already used or not
    mapping(bytes32 => uint256) public messageToTokenId;

    // request updates
    mapping(uint256 => bool) public requestUpdates;

    // remaining giveaways
    uint256 public remainingGiveaways = 100;

    // user giveaways
    mapping(address => uint8) public giveaways;

    // Petri already redeemed
    mapping(uint256 => bool) public petriRedeemed;

    address public artBlocks;

    address[3] public feeRecipients = [
        0xe4657aF058E3f844919c3ee713DF09c3F2949447,
        0xb275E5aa8011eA32506a91449B190213224aEc1e,
        0xdAC81C3642b520584eD0E743729F238D1c350E62
    ];

    modifier onlyOperator() {
        require(isOperator(msg.sender), 'Not operator.');
        _;
    }

    function isOperator(address operator) public view returns (bool) {
        return owner() == operator || contractOperator == operator;
    }

    /// @notice constructor
    /// @param name_ name of the contract (see ERC721)
    /// @param symbol_ symbol of the contract (see ERC721)
    /// @param contractURI_ The contract URI (containing its metadata) - can be empty ""
    /// @param openseaProxyRegistry_ OpenSea's proxy registry to allow gas-less listings - can be address(0)
    /// @param mintSigner_ Address of the wallet used to sign minting orders
    /// @param owner_ Address to whom transfer ownership (can be address(0), then owner is deployer)
    constructor(
        string memory name_,
        string memory symbol_,
        string memory contractURI_,
        address openseaProxyRegistry_,
        address mintSigner_,
        address owner_,
        address oldAstragladeContract_,
        address oldMetaHolder_,
        address artBlocks_
    )
        ERC721Ownable(
            name_,
            symbol_,
            contractURI_,
            openseaProxyRegistry_,
            owner_
        )
    {
        mintSigner = mintSigner_;
        oldAstragladeContract = oldAstragladeContract_;
        oldMetaHolder = oldMetaHolder_;
        artBlocks = artBlocks_;
    }

    /// @notice Mint one token using a minting order
    /// @dev mintingSignature must be a signature that matches `mintSigner` for `mintingOrder`
    /// @param mintingOrder the minting order
    /// @param mintingSignature signature for the mintingOrder
    /// @param petriId petri id to redeem if owner and not already redeemed the free AG
    function mint(
        MintingOrder memory mintingOrder,
        bytes memory mintingSignature,
        uint256 petriId
    ) external payable {
        bytes32 message = hashMintingOrder(mintingOrder)
            .toEthSignedMessageHash();

        address sender = msg.sender;

        require(
            message.recover(mintingSignature) == mintSigner,
            'Wrong minting order signature.'
        );

        require(
            mintingOrder.expiration >= block.timestamp,
            'Minting order expired.'
        );

        require(
            mintingOrder.to == sender,
            'Minting order for another address.'
        );

        require(mintingOrder.seed != 0, 'Seed can not be 0');

        require(messageToTokenId[message] == 0, 'Token already minted.');

        uint256 tokenId = lastTokenId + 1;

        require(tokenId <= MAX_SUPPLY, 'Max supply already reached.');

        uint256 mintingCost = PRICE;

        // For Each Petri (https://artblocks.io/project/67/) created by Fabin on artblocks.io
        // the owner can claim a free Astraglade
        // After a Petri was used, it CAN NOT be used again to claim another Astraglade
        if (petriId >= 67000000 && petriId < 67000200) {
            require(
                // petri was not redeemed already
                petriRedeemed[petriId] == false &&
                    // msg.sender is Petri owner
                    ERC721(artBlocks).ownerOf(petriId) == sender,
                'Petri already redeemed or not owner'
            );

            petriRedeemed[petriId] = true;
            mintingCost = 0;
        } else if (giveaways[sender] > 0) {
            // if the user has some free mints
            giveaways[sender]--;
            mintingCost = 0;
        }

        require(
            msg.value == mintingCost || isOperator(sender),
            'Incorrect value.'
        );

        lastTokenId = tokenId;

        messageToTokenId[message] = tokenId;

        _astraglades[tokenId] = AstragladeMeta({
            seed: mintingOrder.seed,
            signature: mintingOrder.signature,
            imageHash: mintingOrder.imageHash
        });

        _safeMint(mintingOrder.to, tokenId, '');
    }

    /// @inheritdoc	ERC165
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override
        returns (bool)
    {
        return
            ERC721Enumerable.supportsInterface(interfaceId) ||
            interfaceId == type(IERC2981Royalties).interfaceId;
    }

    /// @notice Helper to get the price
    /// @return the price to mint
    function getPrice() external pure returns (uint256) {
        return PRICE;
    }

    /// @notice tokenURI override that returns a data:json application
    /// @inheritdoc	ERC721
    function tokenURI(uint256 tokenId)
        public
        view
        override
        returns (string memory)
    {
        AstragladeMeta memory astraglade = getAstraglade(tokenId);

        string memory astraType;
        if (tokenId <= 10) {
            astraType = 'Universa';
        } else if (tokenId <= 100) {
            astraType = 'Galactica';
        } else if (tokenId <= 1000) {
            astraType = 'Nebula';
        } else if (tokenId <= 2500) {
            astraType = 'Meteora';
        } else if (tokenId <= 5554) {
            astraType = 'Solaris';
        } else {
            astraType = 'Quanta';
        }

        return
            string(
                abi.encodePacked(
                    'data:application/json;utf8,{"name":"Astraglade - ',
                    tokenId.toString(),
                    ' - ',
                    astraType,
                    '","license":"CC BY-SA 4.0","description":"',
                    getDescription(),
                    '","created_by":"Fabin Rasheed","twitter":"@astraglade","image":"ipfs://ipfs/',
                    astraglade.imageHash,
                    '","seed":"',
                    astraglade.seed.toString(),
                    '","signature":"',
                    astraglade.signature,
                    '","animation_url":"',
                    renderTokenURI(tokenId),
                    '"}'
                )
            );
    }

    /// @notice function that returns a string that can be used to render the current token
    /// @param tokenId tokenId
    /// @return the URI to render token
    function renderTokenURI(uint256 tokenId)
        public
        view
        returns (string memory)
    {
        AstragladeMeta memory astraglade = getAstraglade(tokenId);
        return
            string(
                abi.encodePacked(
                    getBaseRenderURI(),
                    '?seed=',
                    astraglade.seed.toString(),
                    '&signature=',
                    astraglade.signature
                )
            );
    }

    /// @notice Returns Metadata for Astraglade id
    /// @param tokenId the tokenId we want metadata for
    function getAstraglade(uint256 tokenId)
        public
        view
        returns (AstragladeMeta memory astraglade)
    {
        require(_exists(tokenId), 'Astraglade: nonexistent token');

        // if the metadata are in this contract
        if (_astraglades[tokenId].seed != 0) {
            astraglade = _astraglades[tokenId];
        } else {
            // or in the old one
            (
                uint256 seed,
                string memory signature,
                string memory imageHash
            ) = IOldMetaHolder(oldMetaHolder).get(tokenId);
            astraglade.seed = seed;
            astraglade.signature = signature;
            astraglade.imageHash = imageHash;
        }
    }

    /// @notice helper to get the description
    function getDescription() public view returns (string memory) {
        if (bytes(_description).length == 0) {
            return
                'Astraglade is an interactive, generative, 3D collectible project. Astraglades are collected through a unique social collection mechanism. Each version of Astraglade can be signed with a signature which will remain in the artwork forever.';
        }

        return _description;
    }

    /// @notice helper to set the description
    /// @param newDescription the new description
    function setDescription(string memory newDescription)
        external
        onlyOperator
    {
        _description = newDescription;
    }

    /// @notice helper to get the base expiration time
    function getExpiration() public view returns (uint256) {
        if (expiration == 0) {
            return 15 * 60;
        }

        return expiration;
    }

    /// @notice helper to set the expiration
    /// @param newExpiration the new expiration
    function setExpiration(uint256 newExpiration) external onlyOperator {
        expiration = newExpiration;
    }

    /// @notice helper to get the baseRenderURI
    function getBaseRenderURI() public view returns (string memory) {
        if (bytes(_baseRenderURI).length == 0) {
            return 'ipfs://ipfs/QmP85DSrtLAxSBnct9iUr7qNca43F3E4vuG6Jv5aoTh9w7';
        }

        return _baseRenderURI;
    }

    /// @notice helper to set the baseRenderURI
    /// @param newRenderURI the new renderURI
    function setBaseRenderURI(string memory newRenderURI)
        external
        onlyOperator
    {
        _baseRenderURI = newRenderURI;
    }

    /// @notice Helper to do giveaways - there can only be `remainingGiveaways` giveaways given all together
    /// @param winner the giveaway winner
    /// @param count how many we giveaway to recipient
    function giveaway(address winner, uint8 count) external onlyOperator {
        require(remainingGiveaways >= count, 'Giveaway limit reached');
        remainingGiveaways -= count;
        giveaways[winner] += count;
    }

    /// @dev Receive, for royalties
    receive() external payable {}

    /// @dev Owner withdraw balance function
    function withdraw() external onlyOperator {
        address[3] memory feeRecipients_ = feeRecipients;

        uint256 balance_ = address(this).balance;
        payable(address(feeRecipients_[0])).transfer((balance_ * 30) / 100);
        payable(address(feeRecipients_[1])).transfer((balance_ * 35) / 100);
        payable(address(feeRecipients_[2])).transfer(address(this).balance);
    }

    /// @notice helper to set the fee recipient at `index`
    /// @param newFeeRecipient the new address
    /// @param index the index to edit
    function setFeeRecipient(address newFeeRecipient, uint8 index)
        external
        onlyOperator
    {
        require(index < feeRecipients.length, 'Index too high.');
        require(newFeeRecipient != address(0), 'Invalid address.');

        feeRecipients[index] = newFeeRecipient;
    }

    /// @notice 10% royalties going to this contract
    /// @inheritdoc	IERC2981Royalties
    function royaltyInfo(uint256, uint256 value)
        external
        view
        override
        returns (address receiver, uint256 royaltyAmount)
    {
        receiver = address(this);
        royaltyAmount = (value * 1000) / 10000;
    }

    /// @notice Hash the Minting Order so it can be signed by the signer
    /// @param mintingOrder the minting order
    /// @return the hash to sign
    function hashMintingOrder(MintingOrder memory mintingOrder)
        public
        pure
        returns (bytes32)
    {
        return keccak256(abi.encode(mintingOrder));
    }

    /// @notice Helper for the owner to change current minting signer
    /// @dev needs to be owner
    /// @param mintSigner_ new signer
    function setMintingSigner(address mintSigner_) external onlyOperator {
        require(mintSigner_ != address(0), 'Invalid Signer address.');
        mintSigner = mintSigner_;
    }

    /// @notice Helper for an operator to change the current operator address
    /// @param newOperator the new operator
    function setContractOperator(address newOperator) external onlyOperator {
        contractOperator = newOperator;
    }

    /// @notice Helper for the owner to change the oldMetaHolder
    /// @dev needs to be owner
    /// @param oldMetaHolder_ new oldMetaHolder address
    function setOldMetaHolder(address oldMetaHolder_) external onlyOperator {
        require(oldMetaHolder_ != address(0), 'Invalid Contract address.');
        oldMetaHolder = oldMetaHolder_;
    }

    /// @notice Helpers that returns the MintingOrder plus the message to sign
    /// @param to the address of the creator
    /// @param seed the seed
    /// @param signature the signature
    /// @param imageHash image hash
    /// @return mintingOrder and message to hash
    function createMintingOrder(
        address to,
        uint256 seed,
        string memory signature,
        string memory imageHash
    )
        external
        view
        returns (MintingOrder memory mintingOrder, bytes32 message)
    {
        mintingOrder = MintingOrder({
            to: to,
            expiration: block.timestamp + getExpiration(),
            seed: seed,
            signature: signature,
            imageHash: imageHash
        });

        message = hashMintingOrder(mintingOrder);
    }

    /// @notice returns a tokenId from an mintingOrder, used to know if already minted
    /// @param mintingOrder the minting order to check
    /// @return an integer. 0 if not minted, else the tokenId
    function tokenIdFromOrder(MintingOrder memory mintingOrder)
        external
        view
        returns (uint256)
    {
        bytes32 message = hashMintingOrder(mintingOrder)
            .toEthSignedMessageHash();
        return messageToTokenId[message];
    }

    /// @notice Allows an owner to request a metadata update.
    ///         Because Astraglade are generated from a backend it can happen that a bug
    ///         blocks the generation of the image OR that a signature with special characters stops the
    ///         token from working.
    ///         This method allows a user to ask for regeneration of the image / signature update
    ///         A contract operator can then update imageHash and / or signature
    /// @param tokenId the tokenId to update
    function requestMetaUpdate(uint256 tokenId) external {
        require(ownerOf(tokenId) == msg.sender, 'Not token owner.');
        requestUpdates[tokenId] = true;
        emit RequestUpdate(msg.sender, tokenId);
    }

    /// @notice Allows an operator of this contract to update a tokenId metadata (signature or image hash)
    ///         after it was requested by its owner.
    ///         This is only used in the case the generation of the Preview image did fail
    ///         in some way or if the signature has special characters that stops the token from working
    /// @param tokenId the tokenId to update
    /// @param newImageHash the new imageHash (can be empty)
    /// @param newSignature the new signature (can be empty)
    function updateMeta(
        uint256 tokenId,
        string memory newImageHash,
        string memory newSignature
    ) external onlyOperator {
        require(
            requestUpdates[tokenId] == true,
            'No update request for token.'
        );
        requestUpdates[tokenId] = false;

        // get the current Astraglade data
        // for ids 1-82 it can come from oldMetaHolder
        AstragladeMeta memory astraglade = getAstraglade(tokenId);
        if (bytes(newImageHash).length > 0) {
            astraglade.imageHash = newImageHash;
        }

        if (bytes(newSignature).length > 0) {
            astraglade.signature = newSignature;
        }

        // save the new state
        _astraglades[tokenId] = astraglade;
    }

    /// @notice function used to allow upgrade of old contract Astraglade to this one.
    /// @inheritdoc	IERC721Receiver
    function onERC721Received(
        address,
        address from,
        uint256 tokenId,
        bytes calldata
    ) external override returns (bytes4) {
        require(msg.sender == oldAstragladeContract, 'Only old Astraglades.');
        // mint tokenId to from
        _mint(from, tokenId);

        // burn old tokenId
        ERC721Burnable(msg.sender).burn(tokenId);

        emit AstragladeUpgraded(from, tokenId);

        return 0x150b7a02;
    }
}

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

/// @title IOldMetaHolder
/// @author Simon Fremaux (@dievardump)
interface IOldMetaHolder {
    function get(uint256 tokenId)
        external
        pure
        returns (
            uint256,
            string memory,
            string memory
        );
}

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

• No Contract Security Audit Submitted- Submit Audit Here

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000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000f6680e700394e7fdc1edc8d57653f507a41929310000000000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : contractURI_ (string): 
Arg [1] : owner_ (address): 0x0000000000000000000000000000000000000000
Arg [2] : planetsContract_ (address): 0x0000000000000000000000000000000000000000
Arg [3] : astragladeContract_ (address): 0xf6680e700394e7fDC1Edc8d57653F507A4192931

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [3] : 000000000000000000000000f6680e700394e7fdc1edc8d57653f507a4192931
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000000