{"sources":{"QuorumKin.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity ^0.8.26;\n\nimport {ERC721} from \"@openzeppelin/contracts/token/ERC721/ERC721.sol\";\nimport {Base64} from \"@openzeppelin/contracts/utils/Base64.sol\";\nimport {Strings} from \"@openzeppelin/contracts/utils/Strings.sol\";\n\ninterface IAgentRegistry { function balanceOf(address) external view returns (uint256); }\n\n/// @title QUORUMKIN — 20,000 on-chain agent delegates on BNB Chain.\n/// Mint (free for .ai Agent ID wallets), an OpenSea-style market, and the Quorum:\n/// seat your Kin to earn a pro-rata share of a BNB pool funded by paid mints and market fees.\n/// The owner switches every module on/off. The owner can never touch the Quorum pool or offer escrow.\ncontract QuorumKin is ERC721 {\n    using Strings for uint256;\n\n    uint256 public constant MAX_SUPPLY = 20000;\n    uint256 public constant FREE_CAP = 18000; // up to 90% can go out free (1 per .ai Agent ID); one shared 20k supply\n    uint256 private constant ACC = 1e18;\n\n    address public owner;\n    IAgentRegistry public registry = IAgentRegistry(0x60B9262456dE011F7d15a54CdD8c48bAaa8B022F);\n\n    // ---------- switches (owner) ----------\n    bool public freeMintOpen;\n    bool public paidMintOpen;\n    bool public marketOpen;\n    bool public quorumOpen;\n    bool public revealed;\n    bool public paidAgentOnly = false;\n\n    uint256 public price = 0.0005 ether;\n    uint256 public maxPerWallet = 50;\n    uint16 public refBps = 1500;        // 15% of paid mint -> referrer, instantly\n    uint16 public mintPoolBps = 2500;   // 25% of paid mint -> Quorum pool; the rest (60%, or 75% with no referrer) -> owner\n    uint16 public feeOwnerBps = 200;    // 2% market fee -> owner\n    uint16 public feePoolBps = 200;     // 2% market fee -> Quorum pool\n    uint16 public royaltyBps = 400;     // EIP-2981 for outside markets\n\n    uint256 public totalSupply;\n    uint256 public freeMinted;\n    uint256 public seed;\n    mapping(address => bool) public claimedFree;\n    mapping(address => uint256) public mintedBy;\n\n    uint256 public ownerBalance;        // only this is withdrawable by owner\n    mapping(address => uint256) public referralEarned;\n    mapping(address => uint256) public referralCount;\n    mapping(address => uint256) public credit; // failed payouts, pull with withdrawCredit()\n\n    // ---------- auctions ----------\n    struct Auction { address seller; uint64 endAt; uint96 reserve; uint96 buyNow; address bidder; uint96 bid; }\n    mapping(uint256 => Auction) public auctions;\n    bool public auctionsOpen;\n\n    // ---------- market ----------\n    struct Listing { address seller; uint96 price; }\n    mapping(uint256 => Listing) public listings;\n    mapping(uint256 => mapping(address => uint256)) public offers; // tokenId => bidder => escrow\n    uint256 public volume;\n    uint256 public sales;\n\n    // ---------- quorum ----------\n    uint256 public accPerSeat;\n    uint256 public totalSeated;\n    uint256 public pendingPool;         // funds waiting for the first seat\n    uint256 public poolPaid;            // lifetime BNB routed to seated Kin\n    mapping(uint256 => address) public seatedBy;\n    mapping(uint256 => uint256) public debt;\n    mapping(uint256 => uint64) public seatedAt;\n    mapping(address => uint256[]) private _seats;\n    mapping(uint256 => uint256) private _seatIdx;\n\n    event Switch(string module, bool on);\n    event Listed(uint256 indexed id, address indexed seller, uint256 price);\n    event Unlisted(uint256 indexed id);\n    event Sold(uint256 indexed id, address indexed from, address indexed to, uint256 price);\n    event Offer(uint256 indexed id, address indexed bidder, uint256 amount);\n    event OfferCancelled(uint256 indexed id, address indexed bidder);\n    event Seated(uint256 indexed id, address indexed who);\n    event Unseated(uint256 indexed id, address indexed who);\n    event Claimed(address indexed who, uint256 amount);\n    event PoolFunded(uint256 amount);\n    event PublicMint(address indexed to, uint256 qty, address indexed referrer, uint256 refPaid);\n    event AuctionCreated(uint256 indexed id, address indexed seller, uint256 reserve, uint256 buyNow, uint64 endAt);\n    event Bid(uint256 indexed id, address indexed bidder, uint256 amount, uint64 endAt);\n    event AuctionSettled(uint256 indexed id, address indexed winner, uint256 amount);\n    event AuctionCancelled(uint256 indexed id);\n\n    modifier onlyOwner() { require(msg.sender == owner, \"owner\"); _; }\n    bool private _lock;\n    modifier nonReentrant() { require(!_lock, \"reentry\"); _lock = true; _; _lock = false; }\n\n    constructor(address _owner) ERC721(\"QUORUMKIN\", \"QRMK\") { owner = _owner; }\n\n    // ================= MINT =================\n    function isAgent(address a) public view returns (bool) {\n        try registry.balanceOf(a) returns (uint256 b) { return b > 0; } catch { return false; }\n    }\n\n    function freeAvailable(address a) external view returns (bool) {\n        return freeMintOpen && !claimedFree[a] && freeMinted < FREE_CAP && totalSupply < MAX_SUPPLY && isAgent(a);\n    }\n\n    /// One free Kin per .ai Agent ID wallet.\n    function mintFree() external {\n        require(freeMintOpen, \"free closed\");\n        require(isAgent(msg.sender), \"no .ai Agent ID\");\n        require(!claimedFree[msg.sender], \"claimed\");\n        require(freeMinted < FREE_CAP && totalSupply < MAX_SUPPLY, \"free sold out\");\n        claimedFree[msg.sender] = true;\n        freeMinted++;\n        _mintOne(msg.sender);\n    }\n\n    function mint(uint256 qty, address referrer) external payable nonReentrant {\n        require(paidMintOpen, \"mint closed\");\n        require(qty > 0 && totalSupply + qty <= MAX_SUPPLY, \"supply\");\n        require(mintedBy[msg.sender] + qty <= maxPerWallet, \"wallet cap\");\n        if (paidAgentOnly) require(isAgent(msg.sender), \"no .ai Agent ID\");\n        require(msg.value == price * qty, \"price\");\n        mintedBy[msg.sender] += qty;\n        uint256 toPool = msg.value * mintPoolBps / 10000;\n        uint256 toRef;\n        if (referrer != address(0) && referrer != msg.sender) {\n            toRef = msg.value * refBps / 10000;\n            referralEarned[referrer] += toRef; referralCount[referrer] += qty;\n        }\n        ownerBalance += msg.value - toPool - toRef;\n        _fund(toPool);\n        for (uint256 i; i < qty; i++) _mintOne(msg.sender);\n        emit PublicMint(msg.sender, qty, referrer, toRef);\n        if (toRef > 0) _payOrCredit(referrer, toRef);\n    }\n\n    function _mintOne(address to) private { unchecked { totalSupply++; } _mint(to, totalSupply); }\n\n    // ================= MARKET =================\n    function list(uint256 id, uint96 p) external {\n        require(marketOpen, \"market closed\");\n        require(ownerOf(id) == msg.sender, \"not holder\");\n        require(p > 0, \"price\");\n        listings[id] = Listing(msg.sender, p);\n        emit Listed(id, msg.sender, p);\n    }\n\n    function unlist(uint256 id) external {\n        require(listings[id].seller == msg.sender, \"not seller\");\n        delete listings[id];\n        emit Unlisted(id);\n    }\n\n    function buy(uint256 id) external payable nonReentrant {\n        require(marketOpen, \"market closed\");\n        Listing memory l = listings[id];\n        require(l.seller != address(0) && ownerOf(id) == l.seller, \"not listed\");\n        require(msg.value == l.price, \"price\");\n        _settle(id, l.seller, msg.sender, msg.value);\n    }\n\n    function makeOffer(uint256 id) external payable {\n        require(marketOpen, \"market closed\");\n        require(id > 0 && id <= totalSupply && msg.value > 0, \"offer\");\n        offers[id][msg.sender] += msg.value;\n        emit Offer(id, msg.sender, offers[id][msg.sender]);\n    }\n\n    function cancelOffer(uint256 id) external nonReentrant {\n        uint256 a = offers[id][msg.sender];\n        require(a > 0, \"none\");\n        offers[id][msg.sender] = 0;\n        emit OfferCancelled(id, msg.sender);\n        _pay(msg.sender, a);\n    }\n\n    function acceptOffer(uint256 id, address bidder, uint256 minAmount) external nonReentrant {\n        require(marketOpen, \"market closed\");\n        require(ownerOf(id) == msg.sender, \"not holder\");\n        uint256 a = offers[id][bidder];\n        require(a > 0 && a >= minAmount, \"offer\");\n        offers[id][bidder] = 0;\n        _settle(id, msg.sender, bidder, a);\n    }\n\n    function _settle(uint256 id, address from, address to, uint256 amt) private {\n        uint256 fo = amt * feeOwnerBps / 10000;\n        uint256 fp = amt * feePoolBps / 10000;\n        ownerBalance += fo;\n        _fund(fp);\n        volume += amt; sales++;\n        _transfer(from, to, id);\n        emit Sold(id, from, to, amt);\n        _pay(from, amt - fo - fp);\n    }\n\n    function createAuction(uint256 id, uint96 reserve, uint96 buyNow, uint64 duration) external {\n        require(marketOpen && auctionsOpen, \"auctions closed\");\n        require(ownerOf(id) == msg.sender, \"not holder\");\n        require(reserve > 0 && duration >= 1 hours && duration <= 14 days, \"params\");\n        require(buyNow == 0 || buyNow >= reserve, \"buyNow\");\n        _transfer(msg.sender, address(this), id);\n        uint64 e = uint64(block.timestamp) + duration;\n        auctions[id] = Auction(msg.sender, e, reserve, buyNow, address(0), 0);\n        emit AuctionCreated(id, msg.sender, reserve, buyNow, e);\n    }\n\n    function minBid(uint256 id) public view returns (uint256) {\n        Auction memory a = auctions[id];\n        return a.bid == 0 ? a.reserve : uint256(a.bid) * 105 / 100;\n    }\n\n    function bid(uint256 id) external payable nonReentrant {\n        Auction storage a = auctions[id];\n        require(a.seller != address(0) && block.timestamp < a.endAt, \"no auction\");\n        if (a.buyNow > 0 && msg.value >= a.buyNow) {\n            address pb = a.bidder; uint256 pv = a.bid;\n            a.bidder = msg.sender; a.bid = uint96(msg.value);\n            if (pb != address(0)) _payOrCredit(pb, pv);\n            _finish(id);\n            return;\n        }\n        require(msg.value >= minBid(id), \"low bid\");\n        address prev = a.bidder; uint256 pval = a.bid;\n        a.bidder = msg.sender; a.bid = uint96(msg.value);\n        if (a.endAt - block.timestamp < 10 minutes) a.endAt = uint64(block.timestamp + 10 minutes);\n        emit Bid(id, msg.sender, msg.value, a.endAt);\n        if (prev != address(0)) _payOrCredit(prev, pval);\n    }\n\n    function settle(uint256 id) external nonReentrant {\n        Auction storage a = auctions[id];\n        require(a.seller != address(0) && block.timestamp >= a.endAt, \"running\");\n        if (a.bidder == address(0)) { address s = a.seller; delete auctions[id]; _transfer(address(this), s, id); emit AuctionCancelled(id); return; }\n        _finish(id);\n    }\n\n    function cancelAuction(uint256 id) external {\n        Auction memory a = auctions[id];\n        require(a.seller == msg.sender && a.bidder == address(0), \"cannot\");\n        delete auctions[id];\n        _transfer(address(this), msg.sender, id);\n        emit AuctionCancelled(id);\n    }\n\n    function _finish(uint256 id) private {\n        Auction memory a = auctions[id];\n        delete auctions[id];\n        uint256 fo = uint256(a.bid) * feeOwnerBps / 10000;\n        uint256 fp = uint256(a.bid) * feePoolBps / 10000;\n        ownerBalance += fo; _fund(fp);\n        volume += a.bid; sales++;\n        _transfer(address(this), a.bidder, id);\n        emit AuctionSettled(id, a.bidder, a.bid);\n        emit Sold(id, a.seller, a.bidder, a.bid);\n        _payOrCredit(a.seller, uint256(a.bid) - fo - fp);\n    }\n\n    function withdrawCredit() external nonReentrant {\n        uint256 c = credit[msg.sender]; require(c > 0, \"none\"); credit[msg.sender] = 0; _pay(msg.sender, c);\n    }\n\n    // ================= QUORUM =================\n    function seat(uint256[] calldata ids) external {\n        require(quorumOpen, \"quorum closed\");\n        for (uint256 i; i < ids.length; i++) {\n            uint256 id = ids[i];\n            require(ownerOf(id) == msg.sender, \"not holder\");\n            _transfer(msg.sender, address(this), id);\n            seatedBy[id] = msg.sender;\n            seatedAt[id] = uint64(block.timestamp);\n            _seatIdx[id] = _seats[msg.sender].length;\n            _seats[msg.sender].push(id);\n            totalSeated++;\n            debt[id] = accPerSeat;\n            if (pendingPool > 0) { accPerSeat += pendingPool * ACC / totalSeated; poolPaid += pendingPool; pendingPool = 0; }\n            emit Seated(id, msg.sender);\n        }\n    }\n\n    function unseat(uint256[] calldata ids) external nonReentrant {\n        uint256 owed;\n        for (uint256 i; i < ids.length; i++) {\n            uint256 id = ids[i];\n            require(seatedBy[id] == msg.sender, \"not yours\");\n            owed += (accPerSeat - debt[id]) / ACC;\n            uint256 idx = _seatIdx[id];\n            uint256[] storage s = _seats[msg.sender];\n            uint256 last = s[s.length - 1];\n            s[idx] = last; _seatIdx[last] = idx; s.pop();\n            delete seatedBy[id]; delete seatedAt[id];\n            totalSeated--;\n            _transfer(address(this), msg.sender, id);\n            emit Unseated(id, msg.sender);\n        }\n        if (owed > 0) { emit Claimed(msg.sender, owed); _pay(msg.sender, owed); }\n    }\n\n    function claim() external nonReentrant {\n        uint256[] storage s = _seats[msg.sender];\n        uint256 owed;\n        for (uint256 i; i < s.length; i++) { owed += (accPerSeat - debt[s[i]]) / ACC; debt[s[i]] = accPerSeat; }\n        require(owed > 0, \"nothing\");\n        emit Claimed(msg.sender, owed);\n        _pay(msg.sender, owed);\n    }\n\n    function seatsOf(address a) external view returns (uint256[] memory) { return _seats[a]; }\n\n    function pendingOf(address a) external view returns (uint256 owed) {\n        uint256[] storage s = _seats[a];\n        for (uint256 i; i < s.length; i++) owed += (accPerSeat - debt[s[i]]) / ACC;\n    }\n\n    function _fund(uint256 amt) private {\n        if (amt == 0) return;\n        emit PoolFunded(amt);\n        if (totalSeated == 0) { pendingPool += amt; return; }\n        accPerSeat += amt * ACC / totalSeated;\n        poolPaid += amt;\n    }\n\n    /// Anyone (including the owner) can top up the Quorum pool.\n    function fundQuorum() external payable { _fund(msg.value); }\n\n    // ================= OWNER =================\n    function setFreeMint(bool on) external onlyOwner { freeMintOpen = on; emit Switch(\"freeMint\", on); }\n    function setPaidMint(bool on) external onlyOwner { paidMintOpen = on; emit Switch(\"paidMint\", on); }\n    function setMarket(bool on) external onlyOwner { marketOpen = on; emit Switch(\"market\", on); }\n    function setQuorum(bool on) external onlyOwner { quorumOpen = on; emit Switch(\"quorum\", on); }\n    function setAuctions(bool on) external onlyOwner { auctionsOpen = on; emit Switch(\"auctions\", on); }\n    function setPaidAgentOnly(bool on) external onlyOwner { paidAgentOnly = on; emit Switch(\"paidAgentOnly\", on); }\n    function reveal() external onlyOwner {\n        require(!revealed, \"done\");\n        revealed = true;\n        seed = uint256(keccak256(abi.encode(blockhash(block.number - 1), block.prevrandao, totalSupply)));\n        emit Switch(\"reveal\", true);\n        emit BatchMetadataUpdate(1, MAX_SUPPLY);\n    }\n    function setPrice(uint256 p) external onlyOwner { price = p; }\n    function setMaxPerWallet(uint256 m) external onlyOwner { maxPerWallet = m; }\n    function setSplits(uint16 _ref, uint16 _mintPool, uint16 _feeOwner, uint16 _feePool, uint16 _royalty) external onlyOwner {\n        require(_ref + _mintPool <= 10000 && _feeOwner + _feePool <= 1000 && _royalty <= 1000, \"bps\");\n        refBps = _ref; mintPoolBps = _mintPool; feeOwnerBps = _feeOwner; feePoolBps = _feePool; royaltyBps = _royalty;\n    }\n    function setRegistry(address r) external onlyOwner { registry = IAgentRegistry(r); }\n    function transferOwnership(address n) external onlyOwner { require(n != address(0)); owner = n; }\n    function withdraw() external onlyOwner nonReentrant {\n        uint256 a = ownerBalance; ownerBalance = 0; _pay(owner, a);\n    }\n\n    // ================= HOOKS =================\n    function _update(address to, uint256 id, address auth) internal override returns (address from) {\n        from = super._update(to, id, auth);\n        if (listings[id].seller != address(0)) { delete listings[id]; emit Unlisted(id); }\n    }\n\n    function _payOrCredit(address to, uint256 a) private {\n        (bool ok,) = to.call{value: a, gas: 30000}(\"\");\n        if (!ok) credit[to] += a;\n    }\n\n    /// One-call dashboard read for the site.\n    function stats() external view returns (uint256 supply, uint256 freeDone, uint256 seated, uint256 poolTotal, uint256 vol, uint256 nSales, uint256 mintPrice, uint256 flags) {\n        flags = (freeMintOpen ? 1 : 0) | (paidMintOpen ? 2 : 0) | (marketOpen ? 4 : 0) | (quorumOpen ? 8 : 0) | (revealed ? 16 : 0) | (auctionsOpen ? 32 : 0) | (paidAgentOnly ? 64 : 0);\n        return (totalSupply, freeMinted, totalSeated, poolPaid + pendingPool, volume, sales, price, flags);\n    }\n\n    function _pay(address to, uint256 a) private { (bool ok,) = to.call{value: a}(\"\"); require(ok, \"pay\"); }\n\n    event BatchMetadataUpdate(uint256 _fromTokenId, uint256 _toTokenId);\n\n    function royaltyInfo(uint256, uint256 salePrice) external view returns (address, uint256) {\n        return (owner, salePrice * royaltyBps / 10000);\n    }\n\n    function supportsInterface(bytes4 i) public view override returns (bool) {\n        return i == 0x2a55205a || i == 0x49064906 || super.supportsInterface(i);\n    }\n\n    // ================= ART (fully on-chain SVG) =================\n    function _role(uint256 r) private pure returns (string memory) {\n        string[6] memory R = [\"Scout\", \"Oracle\", \"Broker\", \"Sentinel\", \"Weaver\", \"Arbiter\"];\n        return R[r % 6];\n    }\n    function _pal(uint256 p) private pure returns (string memory a, string memory b, string memory bg) {\n        string[8] memory A = [\"#F0B90B\", \"#7CFFCB\", \"#FF5C8A\", \"#8AB4FF\", \"#FFD36E\", \"#C59BFF\", \"#5CF2FF\", \"#FF8A3D\"];\n        string[8] memory B = [\"#FFF4CC\", \"#0B3D2E\", \"#2A0B1A\", \"#0D1B3D\", \"#3D2A00\", \"#1E0B3D\", \"#003A40\", \"#401A00\"];\n        string[8] memory G = [\"#0E0E10\", \"#06140F\", \"#14060C\", \"#070B16\", \"#120E04\", \"#0C0716\", \"#041416\", \"#140A04\"];\n        return (A[p % 8], B[p % 8], G[p % 8]);\n    }\n\n    function traits(uint256 id) public view returns (uint256 role, uint256 pal, uint256 nodes, uint256 signal) {\n        uint256 h = uint256(keccak256(abi.encode(id, seed)));\n        role = h % 6; pal = (h >> 8) % 8; nodes = 3 + (h >> 16) % 7; signal = (h >> 24) % 1000;\n    }\n\n    function _svg(uint256 id) private view returns (string memory) {\n        if (!revealed) {\n            return string.concat(\n                '<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 400 400\"><rect width=\"400\" height=\"400\" fill=\"#0E0E10\"/>',\n                '<circle cx=\"200\" cy=\"200\" r=\"120\" fill=\"none\" stroke=\"#F0B90B\" stroke-dasharray=\"4 10\" stroke-width=\"2\"/>',\n                '<text x=\"200\" y=\"212\" font-family=\"monospace\" font-size=\"34\" fill=\"#F0B90B\" text-anchor=\"middle\">SEALED</text>',\n                '<text x=\"200\" y=\"370\" font-family=\"monospace\" font-size=\"16\" fill=\"#777\" text-anchor=\"middle\">KIN #', id.toString(), '</text></svg>'\n            );\n        }\n        (uint256 role, uint256 pal, uint256 n, uint256 sig) = traits(id);\n        (string memory a, string memory b, string memory bg) = _pal(pal);\n        string memory g;\n        string memory pl;\n        uint256 h = uint256(keccak256(abi.encode(seed, id, \"g\")));\n        for (uint256 i; i < n; i++) {\n            uint256 x = 70 + (h >> (i * 16)) % 260;\n            uint256 y = 70 + (h >> (i * 16 + 8)) % 230;\n            pl = string.concat(pl, x.toString(), \",\", y.toString(), \" \");\n            g = string.concat(g,\n                '<line x1=\"200\" y1=\"190\" x2=\"', x.toString(), '\" y2=\"', y.toString(), '\" stroke=\"', a, '\" stroke-opacity=\".5\"/>',\n                '<circle cx=\"', x.toString(), '\" cy=\"', y.toString(), '\" r=\"', (6 + (h >> (i * 5)) % 10).toString(), '\" fill=\"', b, '\" stroke=\"', a, '\" stroke-width=\"2\"/>'\n            );\n        }\n        return string.concat(\n            '<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 400 400\"><rect width=\"400\" height=\"400\" fill=\"', bg, '\"/>',\n            '<circle cx=\"200\" cy=\"190\" r=\"150\" fill=\"none\" stroke=\"', a, '\" stroke-opacity=\".18\" stroke-dasharray=\"2 6\"/><circle cx=\"200\" cy=\"190\" r=\"48\" fill=\"none\" stroke=\"', a, '\" stroke-opacity=\".35\"/>',\n            '<polyline points=\"', pl, '\" fill=\"none\" stroke=\"', a, '\" stroke-opacity=\".25\" stroke-dasharray=\"3 4\"/>', g,\n            '<polygon points=\"200,150 235,190 200,230 165,190\" fill=\"', a, '\"/>',\n            '<text x=\"24\" y=\"372\" font-family=\"monospace\" font-size=\"16\" fill=\"', a, '\">', _role(role), '</text>',\n            '<text x=\"376\" y=\"372\" font-family=\"monospace\" font-size=\"16\" fill=\"', a, '\" text-anchor=\"end\">#', id.toString(), ' / SIG ', sig.toString(), '</text></svg>'\n        );\n    }\n\n    function tokenURI(uint256 id) public view override returns (string memory) {\n        _requireOwned(id);\n        string memory attrs = \"[]\";\n        if (revealed) {\n            (uint256 role, uint256 pal, uint256 n, uint256 sig) = traits(id);\n            attrs = string.concat('[{\"trait_type\":\"Role\",\"value\":\"', _role(role), '\"},{\"trait_type\":\"Palette\",\"value\":\"', pal.toString(),\n                '\"},{\"trait_type\":\"Links\",\"value\":', n.toString(), '},{\"trait_type\":\"Signal\",\"value\":', sig.toString(), '}]');\n        }\n        return string.concat(\"data:application/json;base64,\", Base64.encode(bytes(string.concat(\n            '{\"name\":\"QUORUMKIN #', id.toString(), '\",\"description\":\"An on-chain agent delegate of the QUORUMKIN quorum on BNB Chain.\",\"image\":\"data:image/svg+xml;base64,',\n            Base64.encode(bytes(_svg(id))), '\",\"attributes\":', attrs, '}'))));\n    }\n\n    receive() external payable { _fund(msg.value); }\n}\n"},"@openzeppelin/contracts/token/ERC721/ERC721.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/ERC721.sol)\n\npragma solidity ^0.8.20;\n\nimport {IERC721} from \"./IERC721.sol\";\nimport {IERC721Receiver} from \"./IERC721Receiver.sol\";\nimport {IERC721Metadata} from \"./extensions/IERC721Metadata.sol\";\nimport {Context} from \"../../utils/Context.sol\";\nimport {Strings} from \"../../utils/Strings.sol\";\nimport {IERC165, ERC165} from \"../../utils/introspection/ERC165.sol\";\nimport {IERC721Errors} from \"../../interfaces/draft-IERC6093.sol\";\n\n/**\n * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including\n * the Metadata extension, but not including the Enumerable extension, which is available separately as\n * {ERC721Enumerable}.\n */\nabstract contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Errors {\n    using Strings for uint256;\n\n    // Token name\n    string private _name;\n\n    // Token symbol\n    string private _symbol;\n\n    mapping(uint256 tokenId => address) private _owners;\n\n    mapping(address owner => uint256) private _balances;\n\n    mapping(uint256 tokenId => address) private _tokenApprovals;\n\n    mapping(address owner => mapping(address operator => bool)) private _operatorApprovals;\n\n    /**\n     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.\n     */\n    constructor(string memory name_, string memory symbol_) {\n        _name = name_;\n        _symbol = symbol_;\n    }\n\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {\n        return\n            interfaceId == type(IERC721).interfaceId ||\n            interfaceId == type(IERC721Metadata).interfaceId ||\n            super.supportsInterface(interfaceId);\n    }\n\n    /**\n     * @dev See {IERC721-balanceOf}.\n     */\n    function balanceOf(address owner) public view virtual returns (uint256) {\n        if (owner == address(0)) {\n            revert ERC721InvalidOwner(address(0));\n        }\n        return _balances[owner];\n    }\n\n    /**\n     * @dev See {IERC721-ownerOf}.\n     */\n    function ownerOf(uint256 tokenId) public view virtual returns (address) {\n        return _requireOwned(tokenId);\n    }\n\n    /**\n     * @dev See {IERC721Metadata-name}.\n     */\n    function name() public view virtual returns (string memory) {\n        return _name;\n    }\n\n    /**\n     * @dev See {IERC721Metadata-symbol}.\n     */\n    function symbol() public view virtual returns (string memory) {\n        return _symbol;\n    }\n\n    /**\n     * @dev See {IERC721Metadata-tokenURI}.\n     */\n    function tokenURI(uint256 tokenId) public view virtual returns (string memory) {\n        _requireOwned(tokenId);\n\n        string memory baseURI = _baseURI();\n        return bytes(baseURI).length > 0 ? string.concat(baseURI, tokenId.toString()) : \"\";\n    }\n\n    /**\n     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each\n     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty\n     * by default, can be overridden in child contracts.\n     */\n    function _baseURI() internal view virtual returns (string memory) {\n        return \"\";\n    }\n\n    /**\n     * @dev See {IERC721-approve}.\n     */\n    function approve(address to, uint256 tokenId) public virtual {\n        _approve(to, tokenId, _msgSender());\n    }\n\n    /**\n     * @dev See {IERC721-getApproved}.\n     */\n    function getApproved(uint256 tokenId) public view virtual returns (address) {\n        _requireOwned(tokenId);\n\n        return _getApproved(tokenId);\n    }\n\n    /**\n     * @dev See {IERC721-setApprovalForAll}.\n     */\n    function setApprovalForAll(address operator, bool approved) public virtual {\n        _setApprovalForAll(_msgSender(), operator, approved);\n    }\n\n    /**\n     * @dev See {IERC721-isApprovedForAll}.\n     */\n    function isApprovedForAll(address owner, address operator) public view virtual returns (bool) {\n        return _operatorApprovals[owner][operator];\n    }\n\n    /**\n     * @dev See {IERC721-transferFrom}.\n     */\n    function transferFrom(address from, address to, uint256 tokenId) public virtual {\n        if (to == address(0)) {\n            revert ERC721InvalidReceiver(address(0));\n        }\n        // Setting an \"auth\" arguments enables the `_isAuthorized` check which verifies that the token exists\n        // (from != 0). Therefore, it is not needed to verify that the return value is not 0 here.\n        address previousOwner = _update(to, tokenId, _msgSender());\n        if (previousOwner != from) {\n            revert ERC721IncorrectOwner(from, tokenId, previousOwner);\n        }\n    }\n\n    /**\n     * @dev See {IERC721-safeTransferFrom}.\n     */\n    function safeTransferFrom(address from, address to, uint256 tokenId) public {\n        safeTransferFrom(from, to, tokenId, \"\");\n    }\n\n    /**\n     * @dev See {IERC721-safeTransferFrom}.\n     */\n    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual {\n        transferFrom(from, to, tokenId);\n        _checkOnERC721Received(from, to, tokenId, data);\n    }\n\n    /**\n     * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist\n     *\n     * IMPORTANT: Any overrides to this function that add ownership of tokens not tracked by the\n     * core ERC721 logic MUST be matched with the use of {_increaseBalance} to keep balances\n     * consistent with ownership. The invariant to preserve is that for any address `a` the value returned by\n     * `balanceOf(a)` must be equal to the number of tokens such that `_ownerOf(tokenId)` is `a`.\n     */\n    function _ownerOf(uint256 tokenId) internal view virtual returns (address) {\n        return _owners[tokenId];\n    }\n\n    /**\n     * @dev Returns the approved address for `tokenId`. Returns 0 if `tokenId` is not minted.\n     */\n    function _getApproved(uint256 tokenId) internal view virtual returns (address) {\n        return _tokenApprovals[tokenId];\n    }\n\n    /**\n     * @dev Returns whether `spender` is allowed to manage `owner`'s tokens, or `tokenId` in\n     * particular (ignoring whether it is owned by `owner`).\n     *\n     * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this\n     * assumption.\n     */\n    function _isAuthorized(address owner, address spender, uint256 tokenId) internal view virtual returns (bool) {\n        return\n            spender != address(0) &&\n            (owner == spender || isApprovedForAll(owner, spender) || _getApproved(tokenId) == spender);\n    }\n\n    /**\n     * @dev Checks if `spender` can operate on `tokenId`, assuming the provided `owner` is the actual owner.\n     * Reverts if `spender` does not have approval from the provided `owner` for the given token or for all its assets\n     * the `spender` for the specific `tokenId`.\n     *\n     * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this\n     * assumption.\n     */\n    function _checkAuthorized(address owner, address spender, uint256 tokenId) internal view virtual {\n        if (!_isAuthorized(owner, spender, tokenId)) {\n            if (owner == address(0)) {\n                revert ERC721NonexistentToken(tokenId);\n            } else {\n                revert ERC721InsufficientApproval(spender, tokenId);\n            }\n        }\n    }\n\n    /**\n     * @dev Unsafe write access to the balances, used by extensions that \"mint\" tokens using an {ownerOf} override.\n     *\n     * NOTE: the value is limited to type(uint128).max. This protect against _balance overflow. It is unrealistic that\n     * a uint256 would ever overflow from increments when these increments are bounded to uint128 values.\n     *\n     * WARNING: Increasing an account's balance using this function tends to be paired with an override of the\n     * {_ownerOf} function to resolve the ownership of the corresponding tokens so that balances and ownership\n     * remain consistent with one another.\n     */\n    function _increaseBalance(address account, uint128 value) internal virtual {\n        unchecked {\n            _balances[account] += value;\n        }\n    }\n\n    /**\n     * @dev Transfers `tokenId` from its current owner to `to`, or alternatively mints (or burns) if the current owner\n     * (or `to`) is the zero address. Returns the owner of the `tokenId` before the update.\n     *\n     * The `auth` argument is optional. If the value passed is non 0, then this function will check that\n     * `auth` is either the owner of the token, or approved to operate on the token (by the owner).\n     *\n     * Emits a {Transfer} event.\n     *\n     * NOTE: If overriding this function in a way that tracks balances, see also {_increaseBalance}.\n     */\n    function _update(address to, uint256 tokenId, address auth) internal virtual returns (address) {\n        address from = _ownerOf(tokenId);\n\n        // Perform (optional) operator check\n        if (auth != address(0)) {\n            _checkAuthorized(from, auth, tokenId);\n        }\n\n        // Execute the update\n        if (from != address(0)) {\n            // Clear approval. No need to re-authorize or emit the Approval event\n            _approve(address(0), tokenId, address(0), false);\n\n            unchecked {\n                _balances[from] -= 1;\n            }\n        }\n\n        if (to != address(0)) {\n            unchecked {\n                _balances[to] += 1;\n            }\n        }\n\n        _owners[tokenId] = to;\n\n        emit Transfer(from, to, tokenId);\n\n        return from;\n    }\n\n    /**\n     * @dev Mints `tokenId` and transfers it to `to`.\n     *\n     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible\n     *\n     * Requirements:\n     *\n     * - `tokenId` must not exist.\n     * - `to` cannot be the zero address.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _mint(address to, uint256 tokenId) internal {\n        if (to == address(0)) {\n            revert ERC721InvalidReceiver(address(0));\n        }\n        address previousOwner = _update(to, tokenId, address(0));\n        if (previousOwner != address(0)) {\n            revert ERC721InvalidSender(address(0));\n        }\n    }\n\n    /**\n     * @dev Mints `tokenId`, transfers it to `to` and checks for `to` acceptance.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must not exist.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _safeMint(address to, uint256 tokenId) internal {\n        _safeMint(to, tokenId, \"\");\n    }\n\n    /**\n     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is\n     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.\n     */\n    function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual {\n        _mint(to, tokenId);\n        _checkOnERC721Received(address(0), to, tokenId, data);\n    }\n\n    /**\n     * @dev Destroys `tokenId`.\n     * The approval is cleared when the token is burned.\n     * This is an internal function that does not check if the sender is authorized to operate on the token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _burn(uint256 tokenId) internal {\n        address previousOwner = _update(address(0), tokenId, address(0));\n        if (previousOwner == address(0)) {\n            revert ERC721NonexistentToken(tokenId);\n        }\n    }\n\n    /**\n     * @dev Transfers `tokenId` from `from` to `to`.\n     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.\n     *\n     * Requirements:\n     *\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must be owned by `from`.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _transfer(address from, address to, uint256 tokenId) internal {\n        if (to == address(0)) {\n            revert ERC721InvalidReceiver(address(0));\n        }\n        address previousOwner = _update(to, tokenId, address(0));\n        if (previousOwner == address(0)) {\n            revert ERC721NonexistentToken(tokenId);\n        } else if (previousOwner != from) {\n            revert ERC721IncorrectOwner(from, tokenId, previousOwner);\n        }\n    }\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`, checking that contract recipients\n     * are aware of the ERC721 standard to prevent tokens from being forever locked.\n     *\n     * `data` is additional data, it has no specified format and it is sent in call to `to`.\n     *\n     * This internal function is like {safeTransferFrom} in the sense that it invokes\n     * {IERC721Receiver-onERC721Received} on the receiver, and can be used to e.g.\n     * implement alternative mechanisms to perform token transfer, such as signature-based.\n     *\n     * Requirements:\n     *\n     * - `tokenId` token must exist and be owned by `from`.\n     * - `to` cannot be the zero address.\n     * - `from` cannot be the zero address.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _safeTransfer(address from, address to, uint256 tokenId) internal {\n        _safeTransfer(from, to, tokenId, \"\");\n    }\n\n    /**\n     * @dev Same as {xref-ERC721-_safeTransfer-address-address-uint256-}[`_safeTransfer`], with an additional `data` parameter which is\n     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.\n     */\n    function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual {\n        _transfer(from, to, tokenId);\n        _checkOnERC721Received(from, to, tokenId, data);\n    }\n\n    /**\n     * @dev Approve `to` to operate on `tokenId`\n     *\n     * The `auth` argument is optional. If the value passed is non 0, then this function will check that `auth` is\n     * either the owner of the token, or approved to operate on all tokens held by this owner.\n     *\n     * Emits an {Approval} event.\n     *\n     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.\n     */\n    function _approve(address to, uint256 tokenId, address auth) internal {\n        _approve(to, tokenId, auth, true);\n    }\n\n    /**\n     * @dev Variant of `_approve` with an optional flag to enable or disable the {Approval} event. The event is not\n     * emitted in the context of transfers.\n     */\n    function _approve(address to, uint256 tokenId, address auth, bool emitEvent) internal virtual {\n        // Avoid reading the owner unless necessary\n        if (emitEvent || auth != address(0)) {\n            address owner = _requireOwned(tokenId);\n\n            // We do not use _isAuthorized because single-token approvals should not be able to call approve\n            if (auth != address(0) && owner != auth && !isApprovedForAll(owner, auth)) {\n                revert ERC721InvalidApprover(auth);\n            }\n\n            if (emitEvent) {\n                emit Approval(owner, to, tokenId);\n            }\n        }\n\n        _tokenApprovals[tokenId] = to;\n    }\n\n    /**\n     * @dev Approve `operator` to operate on all of `owner` tokens\n     *\n     * Requirements:\n     * - operator can't be the address zero.\n     *\n     * Emits an {ApprovalForAll} event.\n     */\n    function _setApprovalForAll(address owner, address operator, bool approved) internal virtual {\n        if (operator == address(0)) {\n            revert ERC721InvalidOperator(operator);\n        }\n        _operatorApprovals[owner][operator] = approved;\n        emit ApprovalForAll(owner, operator, approved);\n    }\n\n    /**\n     * @dev Reverts if the `tokenId` doesn't have a current owner (it hasn't been minted, or it has been burned).\n     * Returns the owner.\n     *\n     * Overrides to ownership logic should be done to {_ownerOf}.\n     */\n    function _requireOwned(uint256 tokenId) internal view returns (address) {\n        address owner = _ownerOf(tokenId);\n        if (owner == address(0)) {\n            revert ERC721NonexistentToken(tokenId);\n        }\n        return owner;\n    }\n\n    /**\n     * @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target address. This will revert if the\n     * recipient doesn't accept the token transfer. The call is not executed if the target address is not a contract.\n     *\n     * @param from address representing the previous owner of the given token ID\n     * @param to target address that will receive the tokens\n     * @param tokenId uint256 ID of the token to be transferred\n     * @param data bytes optional data to send along with the call\n     */\n    function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory data) private {\n        if (to.code.length > 0) {\n            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {\n                if (retval != IERC721Receiver.onERC721Received.selector) {\n                    revert ERC721InvalidReceiver(to);\n                }\n            } catch (bytes memory reason) {\n                if (reason.length == 0) {\n                    revert ERC721InvalidReceiver(to);\n                } else {\n                    /// @solidity memory-safe-assembly\n                    assembly {\n                        revert(add(32, reason), mload(reason))\n                    }\n                }\n            }\n        }\n    }\n}\n"},"@openzeppelin/contracts/token/ERC721/IERC721.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721.sol)\n\npragma solidity ^0.8.20;\n\nimport {IERC165} from \"../../utils/introspection/IERC165.sol\";\n\n/**\n * @dev Required interface of an ERC721 compliant contract.\n */\ninterface IERC721 is IERC165 {\n    /**\n     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);\n\n    /**\n     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.\n     */\n    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);\n\n    /**\n     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.\n     */\n    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);\n\n    /**\n     * @dev Returns the number of tokens in ``owner``'s account.\n     */\n    function balanceOf(address owner) external view returns (uint256 balance);\n\n    /**\n     * @dev Returns the owner of the `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function ownerOf(uint256 tokenId) external view returns (address owner);\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon\n     *   a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n     * are aware of the ERC721 protocol to prevent tokens from being forever locked.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or\n     *   {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon\n     *   a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(address from, address to, uint256 tokenId) external;\n\n    /**\n     * @dev Transfers `tokenId` token from `from` to `to`.\n     *\n     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721\n     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must\n     * understand this adds an external call which potentially creates a reentrancy vulnerability.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(address from, address to, uint256 tokenId) external;\n\n    /**\n     * @dev Gives permission to `to` to transfer `tokenId` token to another account.\n     * The approval is cleared when the token is transferred.\n     *\n     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.\n     *\n     * Requirements:\n     *\n     * - The caller must own the token or be an approved operator.\n     * - `tokenId` must exist.\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address to, uint256 tokenId) external;\n\n    /**\n     * @dev Approve or remove `operator` as an operator for the caller.\n     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.\n     *\n     * Requirements:\n     *\n     * - The `operator` cannot be the address zero.\n     *\n     * Emits an {ApprovalForAll} event.\n     */\n    function setApprovalForAll(address operator, bool approved) external;\n\n    /**\n     * @dev Returns the account approved for `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function getApproved(uint256 tokenId) external view returns (address operator);\n\n    /**\n     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.\n     *\n     * See {setApprovalForAll}\n     */\n    function isApprovedForAll(address owner, address operator) external view returns (bool);\n}\n"},"@openzeppelin/contracts/utils/introspection/IERC165.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Interface of the ERC165 standard, as defined in the\n * https://eips.ethereum.org/EIPS/eip-165[EIP].\n *\n * Implementers can declare support of contract interfaces, which can then be\n * queried by others ({ERC165Checker}).\n *\n * For an implementation, see {ERC165}.\n */\ninterface IERC165 {\n    /**\n     * @dev Returns true if this contract implements the interface defined by\n     * `interfaceId`. See the corresponding\n     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\n     * to learn more about how these ids are created.\n     *\n     * This function call must use less than 30 000 gas.\n     */\n    function supportsInterface(bytes4 interfaceId) external view returns (bool);\n}\n"},"@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721Receiver.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @title ERC721 token receiver interface\n * @dev Interface for any contract that wants to support safeTransfers\n * from ERC721 asset contracts.\n */\ninterface IERC721Receiver {\n    /**\n     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}\n     * by `operator` from `from`, this function is called.\n     *\n     * It must return its Solidity selector to confirm the token transfer.\n     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be\n     * reverted.\n     *\n     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.\n     */\n    function onERC721Received(\n        address operator,\n        address from,\n        uint256 tokenId,\n        bytes calldata data\n    ) external returns (bytes4);\n}\n"},"@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/extensions/IERC721Metadata.sol)\n\npragma solidity ^0.8.20;\n\nimport {IERC721} from \"../IERC721.sol\";\n\n/**\n * @title ERC-721 Non-Fungible Token Standard, optional metadata extension\n * @dev See https://eips.ethereum.org/EIPS/eip-721\n */\ninterface IERC721Metadata is IERC721 {\n    /**\n     * @dev Returns the token collection name.\n     */\n    function name() external view returns (string memory);\n\n    /**\n     * @dev Returns the token collection symbol.\n     */\n    function symbol() external view returns (string memory);\n\n    /**\n     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.\n     */\n    function tokenURI(uint256 tokenId) external view returns (string memory);\n}\n"},"@openzeppelin/contracts/utils/Context.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n    function _msgSender() internal view virtual returns (address) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes calldata) {\n        return msg.data;\n    }\n\n    function _contextSuffixLength() internal view virtual returns (uint256) {\n        return 0;\n    }\n}\n"},"@openzeppelin/contracts/utils/Strings.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/Strings.sol)\n\npragma solidity ^0.8.20;\n\nimport {Math} from \"./math/Math.sol\";\nimport {SignedMath} from \"./math/SignedMath.sol\";\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n    bytes16 private constant HEX_DIGITS = \"0123456789abcdef\";\n    uint8 private constant ADDRESS_LENGTH = 20;\n\n    /**\n     * @dev The `value` string doesn't fit in the specified `length`.\n     */\n    error StringsInsufficientHexLength(uint256 value, uint256 length);\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` decimal representation.\n     */\n    function toString(uint256 value) internal pure returns (string memory) {\n        unchecked {\n            uint256 length = Math.log10(value) + 1;\n            string memory buffer = new string(length);\n            uint256 ptr;\n            /// @solidity memory-safe-assembly\n            assembly {\n                ptr := add(buffer, add(32, length))\n            }\n            while (true) {\n                ptr--;\n                /// @solidity memory-safe-assembly\n                assembly {\n                    mstore8(ptr, byte(mod(value, 10), HEX_DIGITS))\n                }\n                value /= 10;\n                if (value == 0) break;\n            }\n            return buffer;\n        }\n    }\n\n    /**\n     * @dev Converts a `int256` to its ASCII `string` decimal representation.\n     */\n    function toStringSigned(int256 value) internal pure returns (string memory) {\n        return string.concat(value < 0 ? \"-\" : \"\", toString(SignedMath.abs(value)));\n    }\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\n     */\n    function toHexString(uint256 value) internal pure returns (string memory) {\n        unchecked {\n            return toHexString(value, Math.log256(value) + 1);\n        }\n    }\n\n    /**\n     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\n     */\n    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\n        uint256 localValue = value;\n        bytes memory buffer = new bytes(2 * length + 2);\n        buffer[0] = \"0\";\n        buffer[1] = \"x\";\n        for (uint256 i = 2 * length + 1; i > 1; --i) {\n            buffer[i] = HEX_DIGITS[localValue & 0xf];\n            localValue >>= 4;\n        }\n        if (localValue != 0) {\n            revert StringsInsufficientHexLength(value, length);\n        }\n        return string(buffer);\n    }\n\n    /**\n     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal\n     * representation.\n     */\n    function toHexString(address addr) internal pure returns (string memory) {\n        return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH);\n    }\n\n    /**\n     * @dev Returns true if the two strings are equal.\n     */\n    function equal(string memory a, string memory b) internal pure returns (bool) {\n        return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b));\n    }\n}\n"},"@openzeppelin/contracts/utils/math/Math.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Standard math utilities missing in the Solidity language.\n */\nlibrary Math {\n    /**\n     * @dev Muldiv operation overflow.\n     */\n    error MathOverflowedMulDiv();\n\n    enum Rounding {\n        Floor, // Toward negative infinity\n        Ceil, // Toward positive infinity\n        Trunc, // Toward zero\n        Expand // Away from zero\n    }\n\n    /**\n     * @dev Returns the addition of two unsigned integers, with an overflow flag.\n     */\n    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        unchecked {\n            uint256 c = a + b;\n            if (c < a) return (false, 0);\n            return (true, c);\n        }\n    }\n\n    /**\n     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.\n     */\n    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        unchecked {\n            if (b > a) return (false, 0);\n            return (true, a - b);\n        }\n    }\n\n    /**\n     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.\n     */\n    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        unchecked {\n            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the\n            // benefit is lost if 'b' is also tested.\n            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522\n            if (a == 0) return (true, 0);\n            uint256 c = a * b;\n            if (c / a != b) return (false, 0);\n            return (true, c);\n        }\n    }\n\n    /**\n     * @dev Returns the division of two unsigned integers, with a division by zero flag.\n     */\n    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        unchecked {\n            if (b == 0) return (false, 0);\n            return (true, a / b);\n        }\n    }\n\n    /**\n     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.\n     */\n    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        unchecked {\n            if (b == 0) return (false, 0);\n            return (true, a % b);\n        }\n    }\n\n    /**\n     * @dev Returns the largest of two numbers.\n     */\n    function max(uint256 a, uint256 b) internal pure returns (uint256) {\n        return a > b ? a : b;\n    }\n\n    /**\n     * @dev Returns the smallest of two numbers.\n     */\n    function min(uint256 a, uint256 b) internal pure returns (uint256) {\n        return a < b ? a : b;\n    }\n\n    /**\n     * @dev Returns the average of two numbers. The result is rounded towards\n     * zero.\n     */\n    function average(uint256 a, uint256 b) internal pure returns (uint256) {\n        // (a + b) / 2 can overflow.\n        return (a & b) + (a ^ b) / 2;\n    }\n\n    /**\n     * @dev Returns the ceiling of the division of two numbers.\n     *\n     * This differs from standard division with `/` in that it rounds towards infinity instead\n     * of rounding towards zero.\n     */\n    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {\n        if (b == 0) {\n            // Guarantee the same behavior as in a regular Solidity division.\n            return a / b;\n        }\n\n        // (a + b - 1) / b can overflow on addition, so we distribute.\n        return a == 0 ? 0 : (a - 1) / b + 1;\n    }\n\n    /**\n     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or\n     * denominator == 0.\n     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by\n     * Uniswap Labs also under MIT license.\n     */\n    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {\n        unchecked {\n            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use\n            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256\n            // variables such that product = prod1 * 2^256 + prod0.\n            uint256 prod0 = x * y; // Least significant 256 bits of the product\n            uint256 prod1; // Most significant 256 bits of the product\n            assembly {\n                let mm := mulmod(x, y, not(0))\n                prod1 := sub(sub(mm, prod0), lt(mm, prod0))\n            }\n\n            // Handle non-overflow cases, 256 by 256 division.\n            if (prod1 == 0) {\n                // Solidity will revert if denominator == 0, unlike the div opcode on its own.\n                // The surrounding unchecked block does not change this fact.\n                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.\n                return prod0 / denominator;\n            }\n\n            // Make sure the result is less than 2^256. Also prevents denominator == 0.\n            if (denominator <= prod1) {\n                revert MathOverflowedMulDiv();\n            }\n\n            ///////////////////////////////////////////////\n            // 512 by 256 division.\n            ///////////////////////////////////////////////\n\n            // Make division exact by subtracting the remainder from [prod1 prod0].\n            uint256 remainder;\n            assembly {\n                // Compute remainder using mulmod.\n                remainder := mulmod(x, y, denominator)\n\n                // Subtract 256 bit number from 512 bit number.\n                prod1 := sub(prod1, gt(remainder, prod0))\n                prod0 := sub(prod0, remainder)\n            }\n\n            // Factor powers of two out of denominator and compute largest power of two divisor of denominator.\n            // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.\n\n            uint256 twos = denominator & (0 - denominator);\n            assembly {\n                // Divide denominator by twos.\n                denominator := div(denominator, twos)\n\n                // Divide [prod1 prod0] by twos.\n                prod0 := div(prod0, twos)\n\n                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.\n                twos := add(div(sub(0, twos), twos), 1)\n            }\n\n            // Shift in bits from prod1 into prod0.\n            prod0 |= prod1 * twos;\n\n            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such\n            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for\n            // four bits. That is, denominator * inv = 1 mod 2^4.\n            uint256 inverse = (3 * denominator) ^ 2;\n\n            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also\n            // works in modular arithmetic, doubling the correct bits in each step.\n            inverse *= 2 - denominator * inverse; // inverse mod 2^8\n            inverse *= 2 - denominator * inverse; // inverse mod 2^16\n            inverse *= 2 - denominator * inverse; // inverse mod 2^32\n            inverse *= 2 - denominator * inverse; // inverse mod 2^64\n            inverse *= 2 - denominator * inverse; // inverse mod 2^128\n            inverse *= 2 - denominator * inverse; // inverse mod 2^256\n\n            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.\n            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is\n            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1\n            // is no longer required.\n            result = prod0 * inverse;\n            return result;\n        }\n    }\n\n    /**\n     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.\n     */\n    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {\n        uint256 result = mulDiv(x, y, denominator);\n        if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) {\n            result += 1;\n        }\n        return result;\n    }\n\n    /**\n     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded\n     * towards zero.\n     *\n     * Inspired by Henry S. Warren, Jr.'s \"Hacker's Delight\" (Chapter 11).\n     */\n    function sqrt(uint256 a) internal pure returns (uint256) {\n        if (a == 0) {\n            return 0;\n        }\n\n        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.\n        //\n        // We know that the \"msb\" (most significant bit) of our target number `a` is a power of 2 such that we have\n        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.\n        //\n        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`\n        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`\n        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`\n        //\n        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.\n        uint256 result = 1 << (log2(a) >> 1);\n\n        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,\n        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at\n        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision\n        // into the expected uint128 result.\n        unchecked {\n            result = (result + a / result) >> 1;\n            result = (result + a / result) >> 1;\n            result = (result + a / result) >> 1;\n            result = (result + a / result) >> 1;\n            result = (result + a / result) >> 1;\n            result = (result + a / result) >> 1;\n            result = (result + a / result) >> 1;\n            return min(result, a / result);\n        }\n    }\n\n    /**\n     * @notice Calculates sqrt(a), following the selected rounding direction.\n     */\n    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {\n        unchecked {\n            uint256 result = sqrt(a);\n            return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);\n        }\n    }\n\n    /**\n     * @dev Return the log in base 2 of a positive value rounded towards zero.\n     * Returns 0 if given 0.\n     */\n    function log2(uint256 value) internal pure returns (uint256) {\n        uint256 result = 0;\n        unchecked {\n            if (value >> 128 > 0) {\n                value >>= 128;\n                result += 128;\n            }\n            if (value >> 64 > 0) {\n                value >>= 64;\n                result += 64;\n            }\n            if (value >> 32 > 0) {\n                value >>= 32;\n                result += 32;\n            }\n            if (value >> 16 > 0) {\n                value >>= 16;\n                result += 16;\n            }\n            if (value >> 8 > 0) {\n                value >>= 8;\n                result += 8;\n            }\n            if (value >> 4 > 0) {\n                value >>= 4;\n                result += 4;\n            }\n            if (value >> 2 > 0) {\n                value >>= 2;\n                result += 2;\n            }\n            if (value >> 1 > 0) {\n                result += 1;\n            }\n        }\n        return result;\n    }\n\n    /**\n     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.\n     * Returns 0 if given 0.\n     */\n    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {\n        unchecked {\n            uint256 result = log2(value);\n            return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);\n        }\n    }\n\n    /**\n     * @dev Return the log in base 10 of a positive value rounded towards zero.\n     * Returns 0 if given 0.\n     */\n    function log10(uint256 value) internal pure returns (uint256) {\n        uint256 result = 0;\n        unchecked {\n            if (value >= 10 ** 64) {\n                value /= 10 ** 64;\n                result += 64;\n            }\n            if (value >= 10 ** 32) {\n                value /= 10 ** 32;\n                result += 32;\n            }\n            if (value >= 10 ** 16) {\n                value /= 10 ** 16;\n                result += 16;\n            }\n            if (value >= 10 ** 8) {\n                value /= 10 ** 8;\n                result += 8;\n            }\n            if (value >= 10 ** 4) {\n                value /= 10 ** 4;\n                result += 4;\n            }\n            if (value >= 10 ** 2) {\n                value /= 10 ** 2;\n                result += 2;\n            }\n            if (value >= 10 ** 1) {\n                result += 1;\n            }\n        }\n        return result;\n    }\n\n    /**\n     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.\n     * Returns 0 if given 0.\n     */\n    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {\n        unchecked {\n            uint256 result = log10(value);\n            return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);\n        }\n    }\n\n    /**\n     * @dev Return the log in base 256 of a positive value rounded towards zero.\n     * Returns 0 if given 0.\n     *\n     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.\n     */\n    function log256(uint256 value) internal pure returns (uint256) {\n        uint256 result = 0;\n        unchecked {\n            if (value >> 128 > 0) {\n                value >>= 128;\n                result += 16;\n            }\n            if (value >> 64 > 0) {\n                value >>= 64;\n                result += 8;\n            }\n            if (value >> 32 > 0) {\n                value >>= 32;\n                result += 4;\n            }\n            if (value >> 16 > 0) {\n                value >>= 16;\n                result += 2;\n            }\n            if (value >> 8 > 0) {\n                result += 1;\n            }\n        }\n        return result;\n    }\n\n    /**\n     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.\n     * Returns 0 if given 0.\n     */\n    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {\n        unchecked {\n            uint256 result = log256(value);\n            return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);\n        }\n    }\n\n    /**\n     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.\n     */\n    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {\n        return uint8(rounding) % 2 == 1;\n    }\n}\n"},"@openzeppelin/contracts/utils/math/SignedMath.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Standard signed math utilities missing in the Solidity language.\n */\nlibrary SignedMath {\n    /**\n     * @dev Returns the largest of two signed numbers.\n     */\n    function max(int256 a, int256 b) internal pure returns (int256) {\n        return a > b ? a : b;\n    }\n\n    /**\n     * @dev Returns the smallest of two signed numbers.\n     */\n    function min(int256 a, int256 b) internal pure returns (int256) {\n        return a < b ? a : b;\n    }\n\n    /**\n     * @dev Returns the average of two signed numbers without overflow.\n     * The result is rounded towards zero.\n     */\n    function average(int256 a, int256 b) internal pure returns (int256) {\n        // Formula from the book \"Hacker's Delight\"\n        int256 x = (a & b) + ((a ^ b) >> 1);\n        return x + (int256(uint256(x) >> 255) & (a ^ b));\n    }\n\n    /**\n     * @dev Returns the absolute unsigned value of a signed value.\n     */\n    function abs(int256 n) internal pure returns (uint256) {\n        unchecked {\n            // must be unchecked in order to support `n = type(int256).min`\n            return uint256(n >= 0 ? n : -n);\n        }\n    }\n}\n"},"@openzeppelin/contracts/utils/introspection/ERC165.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/ERC165.sol)\n\npragma solidity ^0.8.20;\n\nimport {IERC165} from \"./IERC165.sol\";\n\n/**\n * @dev Implementation of the {IERC165} interface.\n *\n * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check\n * for the additional interface id that will be supported. For example:\n *\n * ```solidity\n * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);\n * }\n * ```\n */\nabstract contract ERC165 is IERC165 {\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {\n        return interfaceId == type(IERC165).interfaceId;\n    }\n}\n"},"@openzeppelin/contracts/interfaces/draft-IERC6093.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol)\npragma solidity ^0.8.20;\n\n/**\n * @dev Standard ERC20 Errors\n * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens.\n */\ninterface IERC20Errors {\n    /**\n     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.\n     * @param sender Address whose tokens are being transferred.\n     * @param balance Current balance for the interacting account.\n     * @param needed Minimum amount required to perform a transfer.\n     */\n    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);\n\n    /**\n     * @dev Indicates a failure with the token `sender`. Used in transfers.\n     * @param sender Address whose tokens are being transferred.\n     */\n    error ERC20InvalidSender(address sender);\n\n    /**\n     * @dev Indicates a failure with the token `receiver`. Used in transfers.\n     * @param receiver Address to which tokens are being transferred.\n     */\n    error ERC20InvalidReceiver(address receiver);\n\n    /**\n     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.\n     * @param spender Address that may be allowed to operate on tokens without being their owner.\n     * @param allowance Amount of tokens a `spender` is allowed to operate with.\n     * @param needed Minimum amount required to perform a transfer.\n     */\n    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);\n\n    /**\n     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.\n     * @param approver Address initiating an approval operation.\n     */\n    error ERC20InvalidApprover(address approver);\n\n    /**\n     * @dev Indicates a failure with the `spender` to be approved. Used in approvals.\n     * @param spender Address that may be allowed to operate on tokens without being their owner.\n     */\n    error ERC20InvalidSpender(address spender);\n}\n\n/**\n * @dev Standard ERC721 Errors\n * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens.\n */\ninterface IERC721Errors {\n    /**\n     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20.\n     * Used in balance queries.\n     * @param owner Address of the current owner of a token.\n     */\n    error ERC721InvalidOwner(address owner);\n\n    /**\n     * @dev Indicates a `tokenId` whose `owner` is the zero address.\n     * @param tokenId Identifier number of a token.\n     */\n    error ERC721NonexistentToken(uint256 tokenId);\n\n    /**\n     * @dev Indicates an error related to the ownership over a particular token. Used in transfers.\n     * @param sender Address whose tokens are being transferred.\n     * @param tokenId Identifier number of a token.\n     * @param owner Address of the current owner of a token.\n     */\n    error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);\n\n    /**\n     * @dev Indicates a failure with the token `sender`. Used in transfers.\n     * @param sender Address whose tokens are being transferred.\n     */\n    error ERC721InvalidSender(address sender);\n\n    /**\n     * @dev Indicates a failure with the token `receiver`. Used in transfers.\n     * @param receiver Address to which tokens are being transferred.\n     */\n    error ERC721InvalidReceiver(address receiver);\n\n    /**\n     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.\n     * @param operator Address that may be allowed to operate on tokens without being their owner.\n     * @param tokenId Identifier number of a token.\n     */\n    error ERC721InsufficientApproval(address operator, uint256 tokenId);\n\n    /**\n     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.\n     * @param approver Address initiating an approval operation.\n     */\n    error ERC721InvalidApprover(address approver);\n\n    /**\n     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.\n     * @param operator Address that may be allowed to operate on tokens without being their owner.\n     */\n    error ERC721InvalidOperator(address operator);\n}\n\n/**\n * @dev Standard ERC1155 Errors\n * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens.\n */\ninterface IERC1155Errors {\n    /**\n     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.\n     * @param sender Address whose tokens are being transferred.\n     * @param balance Current balance for the interacting account.\n     * @param needed Minimum amount required to perform a transfer.\n     * @param tokenId Identifier number of a token.\n     */\n    error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);\n\n    /**\n     * @dev Indicates a failure with the token `sender`. Used in transfers.\n     * @param sender Address whose tokens are being transferred.\n     */\n    error ERC1155InvalidSender(address sender);\n\n    /**\n     * @dev Indicates a failure with the token `receiver`. Used in transfers.\n     * @param receiver Address to which tokens are being transferred.\n     */\n    error ERC1155InvalidReceiver(address receiver);\n\n    /**\n     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.\n     * @param operator Address that may be allowed to operate on tokens without being their owner.\n     * @param owner Address of the current owner of a token.\n     */\n    error ERC1155MissingApprovalForAll(address operator, address owner);\n\n    /**\n     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.\n     * @param approver Address initiating an approval operation.\n     */\n    error ERC1155InvalidApprover(address approver);\n\n    /**\n     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.\n     * @param operator Address that may be allowed to operate on tokens without being their owner.\n     */\n    error ERC1155InvalidOperator(address operator);\n\n    /**\n     * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.\n     * Used in batch transfers.\n     * @param idsLength Length of the array of token identifiers\n     * @param valuesLength Length of the array of token amounts\n     */\n    error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);\n}\n"},"@openzeppelin/contracts/utils/Base64.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.2) (utils/Base64.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Provides a set of functions to operate with Base64 strings.\n */\nlibrary Base64 {\n    /**\n     * @dev Base64 Encoding/Decoding Table\n     */\n    string internal constant _TABLE = \"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/\";\n\n    /**\n     * @dev Converts a `bytes` to its Bytes64 `string` representation.\n     */\n    function encode(bytes memory data) internal pure returns (string memory) {\n        /**\n         * Inspired by Brecht Devos (Brechtpd) implementation - MIT licence\n         * https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol\n         */\n        if (data.length == 0) return \"\";\n\n        // Loads the table into memory\n        string memory table = _TABLE;\n\n        // Encoding takes 3 bytes chunks of binary data from `bytes` data parameter\n        // and split into 4 numbers of 6 bits.\n        // The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up\n        // - `data.length + 2`  -> Round up\n        // - `/ 3`              -> Number of 3-bytes chunks\n        // - `4 *`              -> 4 characters for each chunk\n        string memory result = new string(4 * ((data.length + 2) / 3));\n\n        /// @solidity memory-safe-assembly\n        assembly {\n            // Prepare the lookup table (skip the first \"length\" byte)\n            let tablePtr := add(table, 1)\n\n            // Prepare result pointer, jump over length\n            let resultPtr := add(result, 0x20)\n            let dataPtr := data\n            let endPtr := add(data, mload(data))\n\n            // In some cases, the last iteration will read bytes after the end of the data. We cache the value, and\n            // set it to zero to make sure no dirty bytes are read in that section.\n            let afterPtr := add(endPtr, 0x20)\n            let afterCache := mload(afterPtr)\n            mstore(afterPtr, 0x00)\n\n            // Run over the input, 3 bytes at a time\n            for {\n\n            } lt(dataPtr, endPtr) {\n\n            } {\n                // Advance 3 bytes\n                dataPtr := add(dataPtr, 3)\n                let input := mload(dataPtr)\n\n                // To write each character, shift the 3 byte (24 bits) chunk\n                // 4 times in blocks of 6 bits for each character (18, 12, 6, 0)\n                // and apply logical AND with 0x3F to bitmask the least significant 6 bits.\n                // Use this as an index into the lookup table, mload an entire word\n                // so the desired character is in the least significant byte, and\n                // mstore8 this least significant byte into the result and continue.\n\n                mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F))))\n                resultPtr := add(resultPtr, 1) // Advance\n\n                mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F))))\n                resultPtr := add(resultPtr, 1) // Advance\n\n                mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F))))\n                resultPtr := add(resultPtr, 1) // Advance\n\n                mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F))))\n                resultPtr := add(resultPtr, 1) // Advance\n            }\n\n            // Reset the value that was cached\n            mstore(afterPtr, afterCache)\n\n            // When data `bytes` is not exactly 3 bytes long\n            // it is padded with `=` characters at the end\n            switch mod(mload(data), 3)\n            case 1 {\n                mstore8(sub(resultPtr, 1), 0x3d)\n                mstore8(sub(resultPtr, 2), 0x3d)\n            }\n            case 2 {\n                mstore8(sub(resultPtr, 1), 0x3d)\n            }\n        }\n\n        return result;\n    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