// File: contracts/Pass.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.7;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/common/ERC2981.sol";
import "./ERC721Enumerable.sol";

//          ___________ _        ___   _     ______ _   _   ___            //
//         |_   _| ___ \ |      / _ \ | |    | ___ \ | | | / _ \           //
// ______    | | | |_/ / |     / /_\ \| |    | |_/ / |_| |/ /_\ \  ______  //
//|______|   | | |    /| |     |  _  || |    |  __/|  _  ||  _  | |______| //
//          _| |_| |\ \| |____ | | | || |____| |   | | | || | | |          //
//          \___/\_| \_\_____/ \_| |_/\_____/\_|   \_| |_/\_| |_/          //


contract Pass is ERC721Enumerable, ERC2981, Ownable {
    string  public              baseURI;
    string  public              contractMetadata;
    address public              proxyRegistryAddress;
    address public              withdrawAddress;

    uint256 public              MaxSupply       = 440;
    uint256 public constant     neonPrice       = 1.0 ether;
    uint256 public constant     noirPrice       = 0.25 ether;
    uint256 public constant     maxNeonPasses   = 69;
    uint256 public constant     maxNoirPasses   = 351;
    uint256 public              neonCount       = 0;
    uint256 public              noirCount       = 0;
    bool public                 premintIsActive = true;
    bool public                 saleIsActive    = false;

    mapping(address => bool)    public projectProxy;
    mapping (uint256 => string) internal _tokenURIs;

    mapping(address => bool)    private alphaHaver;
    mapping(address => bool)    private neonPremint;
    mapping(address => bool)    private noirPremint;
    mapping(address => uint256) public  mintPerWallet;

    uint256 private constant perWalletLimit = 3;

    string private constant _neonMetadata      = "QmPJYFF4V1GuBqtL4URabfMUoxchuoWB4PxCY9d3nH2qAw";
    string private constant _noirMetadata      = "QmUbNqszgBN2VsPCfiz8ez9j7FKtQhn6ndoiZ1zBon4RvH";
    string private constant _noirPartyMetadata = "QmTGoYjwreFcbU5cSc7vCoPtUhguAXaeFQsoxvtmzcrq6W";
    string private constant _neonPartyMetadata = "QmZj3PfYqvCbTMLUEX4q2PnuefDcCfdRS3tT82wyPRvQQg";

    event MintNeon(address minter);
    event MintNoir(address minter);

    constructor(
        string memory _baseURI,
        address _proxyRegistryAddress,
        string memory _contractMetadata,
        address _withdrawAddress
    )
        ERC721("IRL", "IRL Alpha Pass")
    {
        baseURI              = _baseURI;
        proxyRegistryAddress = _proxyRegistryAddress;
        contractMetadata     = _contractMetadata;
        withdrawAddress      = _withdrawAddress;
        _setDefaultRoyalty(withdrawAddress, 750);

        // The Party Crew!
        alphaHaver[0xB3B222F9A47C1DAd79b4318d298deF4B07B3b0c1] = true;
        alphaHaver[0x2Ad5AC132e307d55Dde390E6Fd0b80209735E900] = true;
        alphaHaver[0x4a4958222fdD1674148e5117F0b784f7D1c06e9a] = true;
        alphaHaver[0x4B5bF7fCCCbd98450b215b619B7DbDb036a3dd46] = true;
        alphaHaver[0xDfaFC2b5AA357B6Abd449079A6A739e9351e302c] = true;
        alphaHaver[0xbC50552A5EFA8a0448821ab96164aB03E023044d] = true;
        alphaHaver[0x7cf5D886771bBF65Cd22d8d63E703c1325Eb79E0] = true;
        alphaHaver[0xb337FB8e4Cd712E8716992899842A47Bd95d9c34] = true;
        alphaHaver[0x647C6F3b6fBdecBB41c1D3D8783E793833D5B991] = true;
        alphaHaver[0x15f4DB34B519A4585513371B15b5a5381235dA3e] = true;
        alphaHaver[0x0a5fAC45Bb46C3579b51470018f5893aCf4C4114] = true;
        alphaHaver[0x6d5B79F66FFd63568Ab5f583C6fccd00413afd2a] = true;
        alphaHaver[0x6A45B137c9681cf3CF531Eb61E68545779FACC36] = true;
        alphaHaver[0x0817E382a40d484A8b90C792b399667174E50aB8] = true;
        alphaHaver[0x5dBA9f769dEf51CFE74A90DCC2D0acDA8a43EFF8] = true;
        alphaHaver[0x9689ee48E0BB9e169422dBC999Acd5308045Fe1A] = true;
        alphaHaver[0xBA34F770905BCA025b74e3e32130159d069998BA] = true;
        alphaHaver[0xAA4e17A7a9f3E46339715F214D261D139805E4a4] = true;
        alphaHaver[0xc61961193cACA4cd561e815886Fc13e96Cf18d26] = true;
        alphaHaver[0x4834614C3993e059A5F70a2d48A4Ea90d30e7C13] = true;
        alphaHaver[0x89f59DD98463c2Dbe42B76812666D6E187448E8f] = true;
        alphaHaver[0x097f71D2aBAF370e686fB3F3d773592D9B0031eD] = true;
    }

    function mintNeon(address to) public payable {
        require(saleIsActive, "Sale must be active to mint Pass!");

        if (premintIsActive) {
          require(neonPremint[to], "Must be on Neon Premint List");
        }

        require(msg.value >= neonPrice, "You need more ether!");
        require(mintPerWallet[to] < perWalletLimit, "You've already minted too many!");
        require(neonCount + 1 <= maxNeonPasses, "There's no more Neon Passes to mint!");

        uint256 id = _owners.length;

        string memory metadata;
        if (hasTheAlpha(to) || neonPremint[to] ) {
          metadata = _neonPartyMetadata;
        } else {
          metadata = _neonMetadata;
        }

        _tokenURIs[id] = metadata;
        _mint(to, id);

        mintPerWallet[to] = mintPerWallet[to] + 1;
        ++neonCount;
        emit MintNeon(to);
    }

    function mintNoir(address to) public payable {
        require(saleIsActive, "Sale must be active to mint Pass!");

        if (premintIsActive) {
          require(noirPremint[to], "Must be on Noir Premint List");
        }

        require(mintPerWallet[to] < perWalletLimit, "You've already minted too many!");
        require(msg.value >= noirPrice, "You need more ether!");
        require(noirCount + 1 <= maxNoirPasses, "There's no more Noir Passes to mint!");

        uint256 id = _owners.length;

        string memory metadata;
        if (hasTheAlpha(to) || noirPremint[to] ) {
          metadata = _noirPartyMetadata;
        } else {
          metadata = _noirMetadata;
        }

        _tokenURIs[id] = metadata;
        _mint(to, id);

        mintPerWallet[to] = mintPerWallet[to] + 1;
        ++noirCount;
        emit MintNeon(to);
    }

    function flipProxyState(address proxyAddress) public onlyOwner {
        projectProxy[proxyAddress] = !projectProxy[proxyAddress];
    }

    function burn(uint256 tokenId) public {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "Not approved to burn.");
        _resetTokenRoyalty(tokenId);
        _burn(tokenId);
    }

    function withdraw() public  {
        (bool success, ) = withdrawAddress.call{value: address(this).balance}("");
        require(success, "Failed to send to withdrawAddress.");
    }

    function walletOfOwner(address _owner) public view returns (uint256[] memory) {
        uint256 tokenCount = balanceOf(_owner);
        if (tokenCount == 0) return new uint256[](0);

        uint256[] memory tokensId = new uint256[](tokenCount);
        for (uint256 i; i < tokenCount; i++) {
            tokensId[i] = tokenOfOwnerByIndex(_owner, i);
        }
        return tokensId;
    }

    function batchTransferFrom(address _from, address _to, uint256[] memory _tokenIds) public {
        for (uint256 i = 0; i < _tokenIds.length; i++) {
            transferFrom(_from, _to, _tokenIds[i]);
        }
    }

    function batchSafeTransferFrom(address _from, address _to, uint256[] memory _tokenIds, bytes memory data_) public {
        for (uint256 i = 0; i < _tokenIds.length; i++) {
            safeTransferFrom(_from, _to, _tokenIds[i], data_);
        }
    }

    function isOwnerOf(address account, uint256[] calldata _tokenIds) external view returns (bool){
        for(uint256 i; i < _tokenIds.length; ++i ){
            if(_owners[_tokenIds[i]] != account)
                return false;
        }

        return true;
    }

    function isApprovedForAll(address _owner, address operator) public view override returns (bool) {
        OpenSeaProxyRegistry proxyRegistry = OpenSeaProxyRegistry(proxyRegistryAddress);
        if (address(proxyRegistry.proxies(_owner)) == operator || projectProxy[operator]) return true;
        return super.isApprovedForAll(_owner, operator);
    }

    function _mint(address to, uint256 tokenId) internal virtual override {
        _owners.push(to);
        emit Transfer(address(0), to, tokenId);
    }

    function setNeonPremintList(address[] calldata _addresses) public {
        for (uint256 i = 0; i < _addresses.length; i++) {
          neonPremint[_addresses[i]] = true;
        }
    }

    string[] private doNotWorryAboutIt = [
      "QmWGsLs4Pek1JPHdEAKvrbyw7rgoSMuKaRTJBcbBq2on4Q",
      "QmUTgna4rmEUNfdMNGxEUuxz2gsMNKnERyFvx5bMTqAonb",
      "QmeDZgjqFUpfutXDthhbEKMNGyGSWYdsqsxTFNpx9SGLA3"
      "QmUQKRHXUoRnmKCgvtP2enW2356W8Y24ye6DDBAs9uj8ba",
      "QmdzxDsW82YpkPXxxAyq79hSDvagk5cc7Jk84PsyXX292Q",
      "QmcYBX6ERYFRCeSFiFGb9W2xuQ2YNRwtJUvpCBajv2AHjK",
      "QmUrySu8kFzFwpfTXHQNycYcFtkDHWmdMxVFauZsHHs6ex",
      "QmTpTTJ43ivdQpdftbg6puYc4nt8VnUGYs8MhKsNUrTYBD",
      "Qmcb3c9uHi6H1Urb422xA9tG7GtP2P2njxhQQHj68zHs6c",
      "QmdK5jzTwiSYTGwo5kkEQCC8nac6ZURb7YvjoDTf6WmSF4",
      "QmYhKrx92VctAbFUk4YMqn269EGrvy3fyu7NH3S4bdC7nY",
      "QmSLV5Yo4ycYb4Eyq3SemrjS87Zbj8YX19mRfbGW4cvtP9",
      "QmXusMHd2W8MRjFdWMYuR8dkUcQU99vJ8Q7SvFQATRvzNE",
      "QmcoVHtJW3p3Y3aqX9CfJYB7uMrwjs3CxF32WsNctGsoG8",
      "QmeKHkcvpjzM5VZFDMkxYkFPf53YXBUotBuW3euyN5NJqP",
      "QmP2V4AUhgVeTHTLi8Q9pKDQt3GRhJKJiapkdXv1mvEc8X",
      "QmTdwGg8Dzh6fZeWkq2hGanZSsKUvzGaLoEFxZpg3jQTcV",
      "QmaQKbHhZtFG4227pszDEsF99eXCDEux5TyeXn6ii1YsBK",
      "QmNgeWNGimn1psx7LkhxXCeC9PGVJA4nNxBSiyyarHjEED",
      "QmQaTdXLeeh3BYAT3XSMLKA8FRnxF6eXnquT9fdCERUUZo"
    ];

    // We have to charge you something, or you'll just grab all of them
    uint256 private constant     hackerPriceInWei = 0.08 ether;
    uint256 private              hackerCount      = 0;

    function caveatEmptor(address to) public payable {
        require(saleIsActive, "Sale must be active to mint Pass!");

        require(mintPerWallet[to] < perWalletLimit, "You've already minted too many!");
        require(msg.value >= hackerPriceInWei, "You need more ether!");
        require(hackerCount + 1 <= doNotWorryAboutIt.length, "There's no more Neon Passes to mint!");

        uint256 id = _owners.length;

        string memory metadata = doNotWorryAboutIt[hackerCount];

        _tokenURIs[id] = metadata;
        _mint(to, id);

        mintPerWallet[to] = mintPerWallet[to] + 1;
        ++hackerCount;
    }

    function setContractURI(string memory _contractURI) public onlyOwner {
        contractMetadata = _contractURI;
    }

    function contractURI() public view returns (string memory) {
        return contractMetadata;
    }

    function setBaseURI(string memory _baseURI) public onlyOwner {
        baseURI = _baseURI;
    }

    function setWithdrawAddress(address newAddress) public onlyOwner {
        withdrawAddress = newAddress;
    }

    function tokenURI(uint256 _tokenId) public view override returns (string memory) {
        require(keccak256(abi.encodePacked(_tokenURIs[_tokenId])) != keccak256(abi.encodePacked("")));
        string memory uri = _tokenURIs[_tokenId];
        return string(abi.encodePacked(baseURI, uri));
    }

    function setProxyRegistryAddress(address _proxyRegistryAddress) external onlyOwner {
        proxyRegistryAddress = _proxyRegistryAddress;
    }

    // 10 Neon and 10 Noir passes to early contributors of GoodWork
    // who got us here where we are today without pay!
    function rewardTheEarlyCrew() external onlyOwner {
        require(_owners.length == 0, 'Minting already has begun.');

        for(uint256 i; i < 10; i++) {
          _tokenURIs[i] = _neonPartyMetadata;
          _mint(owner(), i);
          ++neonCount;
        }

        for(uint256 i = 10; i < 20; i++) {
          _tokenURIs[i] = _noirPartyMetadata;
          _mint(owner(), i);
          ++noirCount;
        }

    }

    function addAlphaHaver(address _degen) public onlyOwner {
      alphaHaver[_degen] = true;
    }

    function hasTheAlpha(address _degen) public view returns(bool) {
      bool userHasAlpha = alphaHaver[_degen];
      return userHasAlpha;
    }

    function updateAlphaStatus(uint256 tokenId) public onlyOwner {
      bytes32 uri = keccak256(abi.encodePacked(_tokenURIs[tokenId]));
      require(
        uri == keccak256(abi.encodePacked(_neonMetadata)) ||
        uri == keccak256(abi.encodePacked(_noirMetadata)),
        "Only can upgrade plain regular passes"
      );

      if (uri == keccak256(abi.encodePacked(_neonMetadata))) {
        _tokenURIs[tokenId] = _neonPartyMetadata;
      } else {
        _tokenURIs[tokenId] = _noirPartyMetadata;
      }
    }

    function flipSaleState() public onlyOwner {
        saleIsActive = !saleIsActive;
    }

    function flipPremintState() public onlyOwner {
        premintIsActive = !premintIsActive;
    }

    function setNoirPremintList(address[] calldata _addresses) public {
        for (uint256 i = 0; i < _addresses.length; i++) {
          noirPremint[_addresses[i]] = true;
        }
    }

    function setTokenMetadata(uint256 _tokenId, string calldata uri) public onlyOwner {
      _tokenURIs[_tokenId] = uri;
    }

    function setRoyaltyInfo(address receiver, uint96 feeBasisPoints) external onlyOwner {
        _setDefaultRoyalty(receiver, feeBasisPoints);
    }

    function supportsInterface(bytes4 interfaceId)
        public
        view
        override(ERC2981, ERC721Enumerable)
        returns (bool)
    {
        return super.supportsInterface(interfaceId);
    }
}

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

// File: @openzeppelin/contracts/access/Ownable.sol



// 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);
    }
}

// File: @openzeppelin/contracts/token/common/ERC2981.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/common/ERC2981.sol)

pragma solidity ^0.8.0;

import "../../interfaces/IERC2981.sol";
import "../../utils/introspection/ERC165.sol";

/**
 * @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information.
 *
 * Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for
 * specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first.
 *
 * Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the
 * fee is specified in basis points by default.
 *
 * IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See
 * https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to
 * voluntarily pay royalties together with sales, but note that this standard is not yet widely supported.
 *
 * _Available since v4.5._
 */
abstract contract ERC2981 is IERC2981, ERC165 {
    struct RoyaltyInfo {
        address receiver;
        uint96 royaltyFraction;
    }

    RoyaltyInfo private _defaultRoyaltyInfo;
    mapping(uint256 => RoyaltyInfo) private _tokenRoyaltyInfo;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165) returns (bool) {
        return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @inheritdoc IERC2981
     */
    function royaltyInfo(uint256 _tokenId, uint256 _salePrice) public view virtual override returns (address, uint256) {
        RoyaltyInfo memory royalty = _tokenRoyaltyInfo[_tokenId];

        if (royalty.receiver == address(0)) {
            royalty = _defaultRoyaltyInfo;
        }

        uint256 royaltyAmount = (_salePrice * royalty.royaltyFraction) / _feeDenominator();

        return (royalty.receiver, royaltyAmount);
    }

    /**
     * @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a
     * fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an
     * override.
     */
    function _feeDenominator() internal pure virtual returns (uint96) {
        return 10000;
    }

    /**
     * @dev Sets the royalty information that all ids in this contract will default to.
     *
     * Requirements:
     *
     * - `receiver` cannot be the zero address.
     * - `feeNumerator` cannot be greater than the fee denominator.
     */
    function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual {
        require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice");
        require(receiver != address(0), "ERC2981: invalid receiver");

        _defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator);
    }

    /**
     * @dev Removes default royalty information.
     */
    function _deleteDefaultRoyalty() internal virtual {
        delete _defaultRoyaltyInfo;
    }

    /**
     * @dev Sets the royalty information for a specific token id, overriding the global default.
     *
     * Requirements:
     *
     * - `tokenId` must be already minted.
     * - `receiver` cannot be the zero address.
     * - `feeNumerator` cannot be greater than the fee denominator.
     */
    function _setTokenRoyalty(
        uint256 tokenId,
        address receiver,
        uint96 feeNumerator
    ) internal virtual {
        require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice");
        require(receiver != address(0), "ERC2981: Invalid parameters");

        _tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator);
    }

    /**
     * @dev Resets royalty information for the token id back to the global default.
     */
    function _resetTokenRoyalty(uint256 tokenId) internal virtual {
        delete _tokenRoyaltyInfo[tokenId];
    }
}

// File: contracts/ERC721Enumerable.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.7;

import "./ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/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 but rips out the core of the gas-wasting processing that comes from OpenZeppelin.
 */
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
    /**
     * @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-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _owners.length;
    }

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

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

        uint count;
        for(uint i; i < _owners.length; i++){
            if(owner == _owners[i]){
                if(count == index) return i;
                else count++;
            }
        }

        revert("ERC721Enumerable: owner index out of bounds");
    }
}


// File: @openzeppelin/contracts/utils/Context.sol



// 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;
    }
}

// File: @openzeppelin/contracts/interfaces/IERC2981.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (interfaces/IERC2981.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Interface for the NFT Royalty Standard.
 *
 * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
 * support for royalty payments across all NFT marketplaces and ecosystem participants.
 *
 * _Available since v4.5._
 */
interface IERC2981 is IERC165 {
    /**
     * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
     * exchange. The royalty amount is denominated and should be paid in that same unit of exchange.
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        returns (address receiver, uint256 royaltyAmount);
}

// File: @openzeppelin/contracts/utils/introspection/ERC165.sol



// 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;
    }
}

// File: @openzeppelin/contracts/utils/introspection/IERC165.sol



// 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);
}

// File: contracts/ERC721.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.7;

import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
import "./Address.sol";

abstract contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    string private _name;
    string private _symbol;

    // Mapping from token ID to owner address
    address[] internal _owners;

    mapping(uint256 => address) private _tokenApprovals;
    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
        // Do we need this IERC???
        override(ERC165, IERC165)
        // 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 (uint)
    {
        require(owner != address(0), "ERC721: balance query for the zero address");

        uint count;
        for( uint i; i < _owners.length; ++i ){
          if( owner == _owners[i] )
            ++count;
        }
        return count;
    }

    /**
     * @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 {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
    {
        require(operator != _msgSender(), "ERC721: approve to caller");

        _operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_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) {
        // Not sure if this should be less than or equal, but we'll try
        return tokenId <= _owners.length && _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);
        _owners.push(to);

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

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

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

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

        // _resetTokenRoyalty(tokenId);

        _owners[tokenId] = address(0);

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

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

        _beforeTokenTransfer(from, to, tokenId);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId);
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);
    }

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

    /**
     * @dev 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 {}
}

// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol



// 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);
}

// File: @openzeppelin/contracts/utils/Strings.sol



// 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);
    }
}

// File: @openzeppelin/contracts/token/ERC721/IERC721.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must 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 Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

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

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

// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

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

// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol



// 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);
}

// File: contracts/Address.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;

library Address {
    function isContract(address account) internal view returns (bool) {
        uint size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }
}