Token

Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Is this a proxy?
• Similar
• Sol2Uml
• Submit Audit
• Compare

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

import "@ensdomains/ens-contracts/contracts/registry/ENS.sol";
import "@ensdomains/ens-contracts/contracts/root/Controllable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";

import "./PhotochromicTools.sol";

contract PhotochromicRegistrar is ERC721Enumerable, Controllable {

    // The ENS registry.
    ENS public immutable ens;
    // The namehash of the TLD this registrar owns (e.g., `.eth`).
    bytes32 public baseNode;
    string public baseNodeString;

    // Mapping from the tokenId (ENS namehash) to IPFS metadata hash.
    mapping(uint256 => bytes32) hashes;
    // Mapping from the owner of a photochromic identity to ENS namehash.
    mapping(address => bytes32) nodes;

    constructor(ENS _ens, bytes32 _baseNode, string memory _baseNodeString) ERC721("Photochromic Identity", "PCI") {
        ens = _ens;
        baseNode = _baseNode;
        baseNodeString = _baseNodeString;
    }

    function isBaseNode(bytes32 node) external view returns (bool) {
        return node == baseNode;
    }

    function burn(bytes32 labelHash, bytes32 baseNodeUser) external onlyController {
        uint256 tokenId = uint256(keccak256(abi.encodePacked(baseNodeUser, labelHash)));
        _burn(tokenId);
        delete hashes[tokenId];
        if (baseNodeUser == baseNode) {
            ens.setSubnodeRecord(baseNode, labelHash, address(this), address(0), 0);
        }
    }

    function nodeOwnedBy(bytes32 node, address holder) external view returns (bool) {
        return nodes[holder] == node;
    }

    function getNode(address holder) external view returns (bytes32) {
        return nodes[holder];
    }

    function removeNode(address holder) external onlyController {
        delete nodes[holder];
    }

    // Returns true if the specified name is available for registration.
    function available(uint256 namehash) public view returns (bool) {
        return !_exists(namehash);
    }

    function isUserIdAvailable(uint256 labelHash) external view returns (bool) {
        uint256 nh = uint256(keccak256(abi.encodePacked(baseNode, bytes32(labelHash))));
        return available(nh);
    }

    function register(
        address user,
        address resolver,
        bytes32 labelHash,
        bytes32 userBaseNode,
        bytes32 ipfsHash
    ) external onlyController returns (uint256) {
        require(balanceOf(user) == 0, "already has a photochromic identity");
        uint256 tokenId = uint256(keccak256(abi.encodePacked(userBaseNode, labelHash)));
        require(available(tokenId), "name already has a photochromic identity");
        _safeMint(user, tokenId);
        if (userBaseNode == baseNode) {
            ens.setSubnodeRecord(baseNode, labelHash, user, resolver, 0);
        }
        hashes[tokenId] = ipfsHash;
        nodes[user] = bytes32(tokenId);
        return tokenId;
    }

    // Returns the Uniform Resource Identifier (URI) for `tokenId` token.
    function tokenURI(uint256 tokenId) public view override(ERC721) returns (string memory) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
        string memory ipfsHash = PhotochromicTools.ipfsToString(hashes[tokenId]);
        return string(abi.encodePacked("ipfs://", ipfsHash));
    }

    function _transfer(address, address, uint256) internal pure override(ERC721) {
        revert("transfer is not allowed for this token");
    }
}

pragma solidity >=0.8.4;

interface ENS {

    // Logged when the owner of a node assigns a new owner to a subnode.
    event NewOwner(bytes32 indexed node, bytes32 indexed label, address owner);

    // Logged when the owner of a node transfers ownership to a new account.
    event Transfer(bytes32 indexed node, address owner);

    // Logged when the resolver for a node changes.
    event NewResolver(bytes32 indexed node, address resolver);

    // Logged when the TTL of a node changes
    event NewTTL(bytes32 indexed node, uint64 ttl);

    // Logged when an operator is added or removed.
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    function setRecord(bytes32 node, address owner, address resolver, uint64 ttl) external virtual;
    function setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl) external virtual;
    function setSubnodeOwner(bytes32 node, bytes32 label, address owner) external virtual returns(bytes32);
    function setResolver(bytes32 node, address resolver) external virtual;
    function setOwner(bytes32 node, address owner) external virtual;
    function setTTL(bytes32 node, uint64 ttl) external virtual;
    function setApprovalForAll(address operator, bool approved) external virtual;
    function owner(bytes32 node) external virtual view returns (address);
    function resolver(bytes32 node) external virtual view returns (address);
    function ttl(bytes32 node) external virtual view returns (uint64);
    function recordExists(bytes32 node) external virtual view returns (bool);
    function isApprovedForAll(address owner, address operator) external virtual view returns (bool);
}

pragma solidity ^0.8.4;

import "@openzeppelin/contracts/access/Ownable.sol";

contract Controllable is Ownable {
    mapping(address => bool) public controllers;

    event ControllerChanged(address indexed controller, bool enabled);

    modifier onlyController {
        require(
            controllers[msg.sender],
            "Controllable: Caller is not a controller"
        );
        _;
    }

    function setController(address controller, bool enabled) public onlyOwner {
        controllers[controller] = enabled;
        emit ControllerChanged(controller, enabled);
    }
}

// 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
pragma solidity ^0.8.7;

library PhotochromicTools {
    bytes constant SHA256_MULTIHASH = hex"1220";
    bytes constant ALPHABET = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";

    /// @return The IPFS hash in base58
    function ipfsToString(bytes32 ipfs) external pure returns (string memory) {
        return toBase58(concat(SHA256_MULTIHASH, toBytes(ipfs)));
    }

    /// @dev Converts hex string to base 58
    function toBase58(bytes memory source) internal pure returns (string memory) {
        uint8[] memory digits = new uint8[](48);
        digits[0] = 0;
        uint8 digitlength = 1;
        for (uint256 i = 0; i < source.length; ++i) {
            uint256 carry = uint8(source[i]);
            for (uint256 j = 0; j < digitlength; ++j) {
                carry += uint256(digits[j]) * 256;
                digits[j] = uint8(carry % 58);
                carry = carry / 58;
            }

            while (carry > 0) {
                digits[digitlength] = uint8(carry % 58);
                digitlength++;
                carry = carry / 58;
            }
        }
        //return digits;
        return toAlphabet(reverse(truncate(digits, digitlength)));
    }

    function toBytes(bytes32 input) internal pure returns (bytes memory) {
        bytes memory output = new bytes(32);
        for (uint8 i = 0; i < 32; i++) {
            output[i] = input[i];
        }
        return output;
    }

    function truncate(uint8[] memory array, uint8 length) internal pure returns (uint8[] memory) {
        uint8[] memory output = new uint8[](length);
        for (uint256 i = 0; i < length; i++) {
            output[i] = array[i];
        }
        return output;
    }

    function reverse(uint8[] memory input) internal pure returns (uint8[] memory) {
        uint8[] memory output = new uint8[](input.length);
        for (uint256 i = 0; i < input.length; i++) {
            output[i] = input[input.length - 1 - i];
        }
        return output;
    }

    function toAlphabet(uint8[] memory indices) internal pure returns (string memory) {
        string memory output = "";
        for (uint256 i = 0; i < indices.length; i++) {
            string memory temp = string(abi.encodePacked(output, ALPHABET[indices[i]]));
            output = temp;
        }
        return output;
    }

    function concat(bytes memory byteArray, bytes memory byteArray2) internal pure returns (bytes memory) {
        bytes memory returnArray = new bytes(byteArray.length + byteArray2.length);
        uint256 i = 0;
        for (; i < byteArray.length; i++) {
            returnArray[i] = byteArray[i];
        }
        for (; i < (byteArray.length + byteArray2.length); i++) {
            returnArray[i] = byteArray2[i - byteArray.length];
        }
        return returnArray;
    }


    function namehash(bytes32 baseNodeHash, string memory label) external pure returns (bytes32) {
        return keccak256(abi.encodePacked(baseNodeHash, keccak256(abi.encodePacked(label))));
    }

    function labelhash(string memory label) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked(label));
    }

    function baseNode(bytes memory ensName) internal pure returns (bytes32) {
        uint len = labelLength(ensName, 0);
        return namehashFrom(ensName, len+1);
    }

    function decomposeEns(string memory ensName) external pure returns (string memory, bytes32) {
        uint len = labelLength(bytes(ensName), 0);
        if (len < 1) revert();
        bytes memory result = new bytes(len);
        for(uint i = 0; i < len; i++) {
            result[i] = bytes(ensName)[i];
        }
        return (string(result), namehashFrom(bytes(ensName), len+1));
    }


    function namehashFrom(bytes memory ensName, uint i) internal pure returns (bytes32) {
        if (ensName.length <= i)
            return 0;

        uint len = labelLength(ensName, i);

        return keccak256(abi.encodePacked(namehashFrom(ensName, i+len+1), keccak(ensName, i, len)));
    }

    function labelLength(bytes memory ensName, uint i) private pure returns (uint) {
        uint len = 0;
        while (i+len != ensName.length && ensName[i+len] != 0x2e) {
            len++;
        }
        return len;
    }

    function keccak(bytes memory data, uint offset, uint len) private pure returns (bytes32 ret) {
        require(offset + len <= data.length);
        assembly {
            ret := keccak256(add(add(data, 32), offset), len)
        }
    }
}

// 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 (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 (last updated v4.5.0) (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);

        _afterTokenTransfer(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);

        _afterTokenTransfer(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 from incorrect owner");
        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);

        _afterTokenTransfer(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 {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (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);

    /**
     * @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/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/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 (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://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/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/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);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 100
  },
  "viaIR": false,
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {
    "contracts/PhotochromicTools.sol": {
      "PhotochromicTools": "0xa0b57a133820128f8bb5046957fc0ffcc3a38467"
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"contract ENS","name":"_ens","type":"address"},{"internalType":"bytes32","name":"_baseNode","type":"bytes32"},{"internalType":"string","name":"_baseNodeString","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"controller","type":"address"},{"indexed":false,"internalType":"bool","name":"enabled","type":"bool"}],"name":"ControllerChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"namehash","type":"uint256"}],"name":"available","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseNode","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseNodeString","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"labelHash","type":"bytes32"},{"internalType":"bytes32","name":"baseNodeUser","type":"bytes32"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"controllers","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ens","outputs":[{"internalType":"contract ENS","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"holder","type":"address"}],"name":"getNode","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"isBaseNode","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"labelHash","type":"uint256"}],"name":"isUserIdAvailable","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"address","name":"holder","type":"address"}],"name":"nodeOwnedBy","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"resolver","type":"address"},{"internalType":"bytes32","name":"labelHash","type":"bytes32"},{"internalType":"bytes32","name":"userBaseNode","type":"bytes32"},{"internalType":"bytes32","name":"ipfsHash","type":"bytes32"}],"name":"register","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"holder","type":"address"}],"name":"removeNode","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"controller","type":"address"},{"internalType":"bool","name":"enabled","type":"bool"}],"name":"setController","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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

00000000000000000000000000000000000c2e074ec69a0dfb2997ba6c7d2e1e335cb3fdf551fa18dd2186a905c2ce925fc27869e1167d6afeed329786fbaddf0000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000001070686f746f6368726f6d69632e65746800000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _ens (address): 0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e
Arg [1] : _baseNode (bytes32): 0x335cb3fdf551fa18dd2186a905c2ce925fc27869e1167d6afeed329786fbaddf
Arg [2] : _baseNodeString (string): photochromic.eth

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000c2e074ec69a0dfb2997ba6c7d2e1e
Arg [1] : 335cb3fdf551fa18dd2186a905c2ce925fc27869e1167d6afeed329786fbaddf
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000010
Arg [4] : 70686f746f6368726f6d69632e65746800000000000000000000000000000000