Contract 0x7Ff2a00Ff543f913b76010A05b5446E36D403675 3

Token Contract 
 
 
Txn Hash
Method
Block
From
To
Value
0xd1dd1ce99cb15c36bdfe6a59326d730d4dfee0144fa5383e0fb3cb13df899bf6Set Approval For...(pending)2022-11-27 1:50:575 days 1 hr ago0xa07f2caf886cfcd4ea3f9b44326c4c62f704cf2f IN the pixels inc: TPIX Token0 Ether(Pending)(Pending)
0x03eed1079b6ac4c7ffdca0f8ea261c70274e255bf61b99dd47eef9b038e95cacSet Approval For...160936002022-12-02 0:40:592 hrs 51 mins agoENS Name *wen🔴.eth IN  the pixels inc: TPIX Token0 Ether0.00024669 10.13671749
0xa0d84cfcdc47db5263f79a4f87fe3add9a1c7718a1081678d75aed1ed9854001Set Approval For...160935982022-12-02 0:40:352 hrs 51 mins agoENS Name *wen🔴.eth IN  the pixels inc: TPIX Token0 Ether0.00026697 10.93206889
0x8a6940e591974472aaf01a59bb972c6c3425934808e49c6064fd021e2958f612Set Approval For...160927982022-12-01 22:00:115 hrs 32 mins agoENS Name 3037.eth IN  the pixels inc: TPIX Token0 Ether0.00056888 12.29418848
0x9a1bf850ada9ec225a9dbf417863bfc298007c6d67091f99dfa0fc37c63a2059Set Approval For...160914842022-12-01 17:35:599 hrs 56 mins ago0x294803520a1e7b671c105c8a3d94836f40b2b557 IN  the pixels inc: TPIX Token0 Ether0.00082874 17.91923772
0x49f5d8cb53a42e680aa92dfb0d9471860fa329f3b99163ed34d899122ed54519Set Approval For...160902322022-12-01 13:23:4714 hrs 8 mins ago0x4f0e1afcefd307ef0f306959c970fe96839349bc IN  the pixels inc: TPIX Token0 Ether0.00056689 12.2511903
0x5f359bfd46bd7d355820e78fc56f843e5dbdde18232ae6bf71475826fabe8e04Set Approval For...160878462022-12-01 5:23:5922 hrs 8 mins agoENS Name kano.eth IN  the pixels inc: TPIX Token0 Ether0.00051475 11.12432261
0x3c16a70a1bfb2de877862cbb96dee6261e25163b8a088649da02584b2de96300Set Approval For...160863992022-12-01 0:33:351 day 2 hrs agoENS Name howies.eth IN  the pixels inc: TPIX Token0 Ether0.00056091 12.12186062
0x0dd936330d2d73e600e9951f8cf1fbcca586031588b3234673df955731e9de2bSet Approval For...160856192022-11-30 21:55:591 day 5 hrs agoENS Name *wen🔴.eth IN  the pixels inc: TPIX Token0 Ether0.00092107 19.8793704
0x6c668849c0c97701f8472171a674387ccd3170108f9904d4276942616c848369Set Approval For...160850232022-11-30 19:55:111 day 7 hrs agoENS Name 36chambers.eth IN  the pixels inc: TPIX Token0 Ether0.0005202911.2439895
0xde8f42ee3cdf9cdd8bb08d8c60f142d8b31f18bc42647cf68a6452a56b3650ebSet Approval For...160732282022-11-29 4:21:472 days 23 hrs agoENS Name wuestenigel.eth IN  the pixels inc: TPIX Token0 Ether0.00028359 11.6126297
0x8ebcf63cea9faeec061e5d5db49b2d7b9422e63f16ca75885a6a642974d6c532Set Approval For...160698582022-11-28 17:03:473 days 10 hrs agoENS Name blockchainpanda.eth IN  the pixels inc: TPIX Token0 Ether0.00110283 23.84563917
0xee5135eeb743660d8a526efd09909bb6dad424b73c508af325bbb723816758c9Set Approval For...160629512022-11-27 17:55:474 days 9 hrs ago0x69542358fed24ba6ba1d6121f859ab4eb1ea5875 IN  the pixels inc: TPIX Token0 Ether0.00029129 11.05527881
0x1c1be1e97c6b928a8af804cf526a542be4a5cc549933dcd124528f8ae4238a96Set Approval For...160629492022-11-27 17:55:234 days 9 hrs ago0x69542358fed24ba6ba1d6121f859ab4eb1ea5875 IN  the pixels inc: TPIX Token0 Ether0.00049776 10.76265897
0x7d3d5100f53c5892bc3eb3551c4fa5145cdeaa2246fad621dc1e946fa4de47f6Set Approval For...160587532022-11-27 3:52:354 days 23 hrs agoENS Name chumfucks.eth IN  the pixels inc: TPIX Token0 Ether0.00047475 10.24652982
0xfaa9081257108bdf275da052541ddb6d437e022ab068df070776d0a48ebcf580Set Approval For...160556422022-11-26 17:26:355 days 10 hrs ago0x19dd9425fc3bff996d0eb3f21afb457c467d1882 IN  the pixels inc: TPIX Token0 Ether0.00047615 10.29008334
0x8d66fb7cce1a920c4f6822bcf09b57044b930542ada372405d81db0dda5aabb3Set Approval For...160501352022-11-25 22:59:356 days 4 hrs ago0x5c00241cc81d7db6ff16f9c02a94ef1ce9a148f5 IN  the pixels inc: TPIX Token0 Ether0.00055685 12.01860028
0x8e8558fe8ec8e4087ce01dd7217b896cce4531f829343f32aad2453bf740ed43Safe Transfer Fr...160501182022-11-25 22:56:116 days 4 hrs agoENS Name tusamon.eth IN  the pixels inc: TPIX Token0 Ether0.00098429 9.86553575
0x5fc3ce33f24f9507bf74c0d23c5b764c078f1aad803b5969185b9327559d4af7Set Approval For...160326982022-11-23 12:28:598 days 15 hrs ago0xb0b5b1e32a51a1d6529660e1dca957572a2f2076 IN  the pixels inc: TPIX Token0 Ether0.00063631 13.7513426
0xc79e999b668bd5875fa316fca5c33d7e8b3a5378160f3f298600a5974aa16720Set Approval For...160294272022-11-23 1:30:239 days 2 hrs ago0xa93ff05d277d896d10a4172c2dc19d70730e8bdc IN  the pixels inc: TPIX Token0 Ether0.00053091 11.47944159
0xf0ec6a6167c3bd0400c33537627ce333a869a9e815bebd0d1c765e1ac1528beeSet Approval For...160272702022-11-22 18:16:119 days 9 hrs agoENS Name koyo.eth IN  the pixels inc: TPIX Token0 Ether0.001511 32.65412343
0xc2dfa9259e09710b839798193eafa32243ca4931400096726a795635d000ba08Set Approval For...160240992022-11-22 7:36:119 days 19 hrs ago0xa93ff05d277d896d10a4172c2dc19d70730e8bdc IN  the pixels inc: TPIX Token0 Ether0.0004979 10.76007082
0xbbc900df545f182a976545a11f671c133a64ce2d3bab5b940cc985de9ae849b1Set Approval For...160211092022-11-21 21:35:3510 days 5 hrs ago0x690f4bc09dbefefb1e01ac74ec4fd24064bb78dd IN  the pixels inc: TPIX Token0 Ether0.00052919 11.44236483
0x9c4c466bbcbc3e1d4e0eaeb8704acd8895f95dffc844d4d213a29ba636634aaeSet Approval For...160112422022-11-20 12:31:3511 days 15 hrs ago0xb193b915379cee3e3e474169a8d58d0cea0486ee IN  the pixels inc: TPIX Token0 Ether0.00050966 11
0xa251eb0ae2fbbe050dd0632235721155a916e73357ffa973bdb1423be62ce580Set Approval For...160111202022-11-20 12:06:4711 days 15 hrs ago0x342864edd95f785ba01c01d0e678d9d13395bfd3 IN  the pixels inc: TPIX Token0 Ether0.00069189 14.96013986
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OVERVIEW

'the pixels inc' are interactive identities from "the dudes". They are generated randomly at mint on Ethereum. There are only 5120 'the pixels' out there. Do not forget to tap and hold your pixel to draw your own unique background.

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Contract Source Code Verified (Exact Match)

Contract Name:
ThePixels

Compiler Version
v0.8.0+commit.c7dfd78e

Optimization Enabled:
Yes with 1000 runs

Other Settings:
default evmVersion
File 1 of 16 : ThePixels.sol
// SPDX-License-Identifier: MIT

// ______  __  __   ______       _____    __  __   _____    ______
// /\__  _\/\ \_\ \ /\  ___\     /\  __-. /\ \/\ \ /\  __-. /\  ___\
// \/_/\ \/\ \  __ \\ \  __\     \ \ \/\ \\ \ \_\ \\ \ \/\ \\ \  __\
//   \ \_\ \ \_\ \_\\ \_____\    \ \____- \ \_____\\ \____- \ \_____\
//    \/_/  \/_/\/_/ \/_____/     \/____/  \/_____/ \/____/  \/_____/
//

pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";

import "./ThePixelsDNAFactory.sol";
import "./IThePixelsMetadataProvider.sol";
import "./IThePixelsDNAUpdater.sol";

contract ThePixels is Ownable, ERC721Enumerable, ThePixelsDNAFactory {
  uint256 public maxPixels;
  uint256 constant public MAX_SPECIAL_PIXELS = 5;

  address public salesContractAddress;
  address public metadataProviderContractAddress;
  address public DNAUpdaterContractAddress;

  mapping (uint256 => bool) public foundDNAs;
  mapping (uint256 => bool) public mintedSpecialDNAs;
  mapping (uint256 => uint256) public pixelDNAs;
  mapping (uint256 => uint256) public pixelDNAExtensions;

  constructor (uint256 _maxPixels) ERC721("the pixels", "TPIX") {
    maxPixels = _maxPixels;
    _setTraitTable();
  }

  function setSalesContract(address _salesContractAddress) external onlyOwner {
    salesContractAddress = _salesContractAddress;
  }

  function setMetadataProviderContract(address _metadataProviderContractAddress) external onlyOwner {
    metadataProviderContractAddress = _metadataProviderContractAddress;
  }

  function setDNAUpdaterContract(address _DNAUpdaterContractAddress) external onlyOwner {
    DNAUpdaterContractAddress = _DNAUpdaterContractAddress;
  }

  function mintSpecialPixelDNA(uint256 index, uint256 _salt) external onlyOwner {
    require(index >= 0 && index < MAX_SPECIAL_PIXELS, "Invalid index");
    require(!mintedSpecialDNAs[index], "Already minted");
    uint256 totalSupply = totalSupply();
    uint256 winnerTokenIndex = _rnd(_salt, index) % totalSupply;
    address winnerAddress = ownerOf(winnerTokenIndex);
    pixelDNAs[totalSupply] = index;
    mintedSpecialDNAs[index] = true;
    _safeMint(winnerAddress, totalSupply);
  }

  function mint(address to, uint256 salt, uint256 _nonce) external {
    require(msg.sender == salesContractAddress, "Well, there is a reason only sale contract can do this.");
    uint256 totalSupply = totalSupply();
    require(totalSupply < maxPixels, "Hit the limit");
    _mintWithUniqueDNA(to, totalSupply, salt, _nonce);
  }

  function _mintWithUniqueDNA(address _to, uint256 _tokenId, uint256 _salt, uint256 _nonce) internal {
    uint256 uniqueDNA = _getUniqueDNA(_salt, _nonce);
    pixelDNAs[_tokenId] = uniqueDNA;
    _safeMint(_to, _tokenId);
  }

  function _getUniqueDNA(uint256 _salt, uint256 _nonce) internal returns (uint256) {
    uint256 generationAttempt = 0;
    while(true) {
      uint256 extendedDNA = getEncodedRandomDNA(_salt, _nonce + generationAttempt);
      if (foundDNAs[extendedDNA] == false) {
        foundDNAs[extendedDNA] = true;
        return extendedDNA;
      }
      generationAttempt++;
    }
  }

  function getEncodedRandomDNA(uint256 _salt, uint256 _nonce) internal view returns (uint256) {
    uint8[11] memory foundDNA = _getRandomDNA(_salt, _nonce);
    uint256 encodedDNA = 10 ** (foundDNA.length * 2 + 1);
    for(uint256 i=0; i<foundDNA.length; i++) {
      encodedDNA += foundDNA[i] * (10 ** ((foundDNA.length - i) * 2));
    }
    return encodedDNA;
  }

  function tokenURI(uint256 _tokenId) public view virtual override returns (string memory) {
    require(_exists(_tokenId), "ERC721Metadata: URI query for nonexistent token");
    require(metadataProviderContractAddress != address(0), "Invalid metadata provider address");

    return IThePixelsMetadataProvider(metadataProviderContractAddress)
      .getMetadata(
        _tokenId,
        pixelDNAs[_tokenId],
        pixelDNAExtensions[_tokenId]
      );
  }

  function tokensOfOwner(address _owner) public view returns (uint256[] memory) {
    uint256 tokenCount = balanceOf(_owner);
    if (tokenCount == 0) {
      return new uint256[](0);
    } else {
      uint256[] memory result = new uint256[](tokenCount);
      uint256 index;
      for (index = 0; index < tokenCount; index++) {
        result[index] = tokenOfOwnerByIndex(_owner, index);
      }
      return result;
    }
  }

  function updateDNAExtension(uint256 _tokenId) external {
    require(DNAUpdaterContractAddress != address(0), "Invalid updater address");
    require(msg.sender == ownerOf(_tokenId), "You need to own the token to update");

    uint256 newDNAExtension = IThePixelsDNAUpdater(DNAUpdaterContractAddress).getUpdatedDNAExtension(
      msg.sender,
      _tokenId,
      pixelDNAs[_tokenId],
      pixelDNAExtensions[_tokenId]
    );
    pixelDNAExtensions[_tokenId] = newDNAExtension;
  }
}

File 2 of 16 : Ownable.sol
// SPDX-License-Identifier: MIT

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() {
        _setOwner(_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 {
        _setOwner(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");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 3 of 16 : ERC721Enumerable.sol
// SPDX-License-Identifier: MIT

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();
    }
}

File 4 of 16 : IERC721.sol
// SPDX-License-Identifier: MIT

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;
}

File 5 of 16 : ThePixelsDNAFactory.sol
// SPDX-License-Identifier: MIT

// ______  __  __   ______       _____    __  __   _____    ______
// /\__  _\/\ \_\ \ /\  ___\     /\  __-. /\ \/\ \ /\  __-. /\  ___\
// \/_/\ \/\ \  __ \\ \  __\     \ \ \/\ \\ \ \_\ \\ \ \/\ \\ \  __\
//   \ \_\ \ \_\ \_\\ \_____\    \ \____- \ \_____\\ \____- \ \_____\
//    \/_/  \/_/\/_/ \/_____/     \/____/  \/_____/ \/____/  \/_____/
//

pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;

contract ThePixelsDNAFactory {
  uint8 constant internal maxRarityScore = 101;

  uint8 constant internal themePastelRarity = 0;
  uint8 constant internal themeZombieRarity = 80;
  uint8 constant internal themeAlienRarity = 95;

  uint8 constant internal baseDNARarity = 99;
  uint8 constant internal costumeDNARarity = 10;

  mapping (uint8 => uint8[]) public traitTable;
  // Base DNA parts:
  uint8[3] internal themes;
  uint8[18] internal bodies;
  uint8[5] internal faces;
  uint8[8] internal eyes;
  uint8[11] internal noses;
  uint8[9] internal mouths;
  // Dynamic DNA parts:
  uint8[5] internal costumes;           //6 - 1
  uint8[46] internal headAccessories;   //7 - 2
  uint8[18] internal hairs;             //8 - 3
  uint8[25] internal sunglasses;        //9 - 4
  uint8[7] internal facialHairs;        //10 - 5

  function _getRandomDNA(uint256 _seed, uint256 _nonce) internal view returns (uint8[11] memory) {
    uint256 r = _rnd(_seed, _nonce) % maxRarityScore;

    if (r > themeAlienRarity) {
      return _getAlienDNA(_seed, _nonce + 1);
    }else if (r > themeZombieRarity) {
      return _getZombieDNA(_seed, _nonce + 2);
    }else {
      return _getPastelDNA(_seed, _nonce + 3);
    }
  }

  function _getPastelDNA(uint256 _seed, uint256 _nonce) internal view returns (uint8[11] memory) {
    uint256 r = _rnd(_seed, _nonce) % maxRarityScore;
    uint8[11] memory finalDNA = _getBaseDNA(_seed, _nonce + 1, 0);
    uint256 nextNonce = _nonce + 13;

    //99 - 100
    if (r >= baseDNARarity) {
      return finalDNA;

    // 54 - 99
    }else if (r < baseDNARarity && r >= 54) {
      finalDNA[7] = _pickTrait(7, _seed, nextNonce + 2);
      finalDNA[9] = _pickTrait(9, _seed, nextNonce + 3);
      finalDNA[10] = _pickTrait(10, _seed, nextNonce + 4);

    // 54 - 32
    }else if (r < 54 && r >= 32) {
      finalDNA[7] = _pickTrait(7, _seed, nextNonce + 2);
      finalDNA[9] = _pickTrait(9, _seed, nextNonce + 3);

    // 32 - 10
    }else if (r < 32 && r >= costumeDNARarity) {
      finalDNA[8] = _pickTrait(8, _seed, nextNonce + 5);
      finalDNA[9] = _pickTrait(9, _seed, nextNonce + 6);

    // 0 - 10
    }else {
      finalDNA[6] = _pickTrait(6, _seed, nextNonce + 7);
      finalDNA[9] = _pickTrait(9, _seed, nextNonce + 8);
      finalDNA[10] = _pickTrait(10, _seed, nextNonce + 9);
    }
    return finalDNA;
  }

  function _getZombieDNA(uint256 _seed, uint256 _nonce) internal view returns (uint8[11] memory) {
    uint256 r = _rnd(_seed, _nonce) % maxRarityScore;
    uint8[11] memory finalDNA = _getBaseDNA(_seed, _nonce + 1, 1);
    uint256 nextNonce = _nonce + 13;

    if (r >= baseDNARarity) {
      return finalDNA;

    // 54 - 99
    }else if (r < baseDNARarity && r >= 54) {
      finalDNA[7] = _pickTrait(7, _seed, nextNonce + 2);
      finalDNA[9] = _pickTrait(9, _seed, nextNonce + 3);
      finalDNA[10] = _pickTrait(10, _seed, nextNonce + 4);

    // 54 - 32
    }else if (r < 54 && r >= 32) {
      finalDNA[7] = _pickTrait(7, _seed, nextNonce + 2);
      finalDNA[9] = _pickTrait(9, _seed, nextNonce + 3);

    // 32 - 10
    }else if (r < 32 && r >= costumeDNARarity) {
      finalDNA[8] = _pickTrait(8, _seed, nextNonce + 5);
      finalDNA[9] = _pickTrait(9, _seed, nextNonce + 6);

    // 0 - 10
    }else {
      finalDNA[6] = _pickTrait(6, _seed, nextNonce + 7);
      finalDNA[9] = _pickTrait(9, _seed, nextNonce + 8);
      finalDNA[10] = _pickTrait(10, _seed, nextNonce + 9);
    }
    return finalDNA;
  }

  function _getAlienDNA(uint256 _seed, uint256 _nonce) internal view returns (uint8[11] memory) {
    uint256 r = _rnd(_seed, _nonce) % maxRarityScore;
    uint8[11] memory finalDNA = _getBaseDNA(_seed, _nonce + 1, 2);
    uint256 nextNonce = _nonce + 13;

    if (r >= baseDNARarity) {
      return finalDNA;

    }else if (r < baseDNARarity && r >= 50) {
      finalDNA[7] = _pickTrait(7, _seed, nextNonce + 2);

    }else if (r < 50 && r >= costumeDNARarity) {
      finalDNA[8] = _pickTrait(8, _seed, nextNonce + 3);

    }else {
      finalDNA[6] = _pickTrait(6, _seed, nextNonce + 4);
    }
    return finalDNA;
  }

  function _getBaseDNA(uint256 _seed, uint256 _nonce, uint8 _theme) internal view returns (uint8[11] memory) {
    uint8[11] memory dna;
    dna[0] = _theme;
    if (_theme == 2) {
      dna[1] = _pickTrait(1, _seed, _nonce + 1);
      dna[2] = _pickTrait(2, _seed, _nonce + 2);
      dna[3] = 8;
      dna[4] = _pickTrait(4, _seed, _nonce + 4);
      dna[5] = _pickTrait(5, _seed, _nonce + 5);
    }else{
      dna[1] = _pickTrait(1, _seed, _nonce + 6);
      dna[2] = _pickTrait(2, _seed, _nonce + 7);
      dna[3] = _pickTrait(3, _seed, _nonce + 8);
      dna[4] = _pickTrait(4, _seed, _nonce + 9);
      dna[5] = _pickTrait(5, _seed, _nonce + 10);
    }
    return dna;
  }

  function _pickTrait(uint8 traitIndex, uint256 _seed, uint256 _nonce) internal view returns (uint8) {
    uint256 beginIndex = _rnd(_seed, _seed + _nonce + traitIndex);
    uint256 r = beginIndex % maxRarityScore;

    uint8[] memory _traits = traitTable[traitIndex];
    for (uint256 i=beginIndex; i<beginIndex + _traits.length; i++) {
      uint256 index = i % _traits.length;
      if (_traits[index] <= r) {
        return uint8(index);
      }
    }
    return uint8(beginIndex);
  }

  function _setBodyRarities() internal {
    bodies[0] = 0;
    bodies[1] = 0;
    bodies[2] = 10;
    bodies[3] = 95;
    bodies[4] = 15;
    bodies[5] = 0;
    bodies[6] = 5;
    bodies[7] = 0;
    bodies[8] = 0;
    bodies[9] = 35;
    bodies[10] = 0;
    bodies[11] = 15;
    bodies[12] = 25;
    bodies[13] = 25;
    bodies[14] = 20;
    bodies[15] = 30;
    bodies[16] = 20;
    bodies[17] = 30;
  }

  function _setFaceRarities() internal {
    faces[0] = 0;
    faces[1] = 0;
    faces[2] = 0;
    faces[3] = 5;
    faces[4] = 10;
  }

  function _setEyesRarities() internal {
    eyes[0] = 0;
    eyes[1] = 0;
    eyes[2] = 10;
    eyes[3] = 15;
    eyes[4] = 5;
    eyes[5] = 5;
    eyes[6] = 30;
    eyes[7] = 30;
  }

  function _setNoseRarities() internal {
    noses[0] = 15;
    noses[1] = 15;
    noses[2] = 5;
    noses[3] = 25;
    noses[4] = 0;
    noses[5] = 0;
    noses[6] = 50;
    noses[7] = 0;
    noses[8] = 0;
    noses[9] = 20;
    noses[10] = 20;
  }

  function _setMouthRarities() internal {
    mouths[0] = 0;
    mouths[1] = 10;
    mouths[2] = 15;
    mouths[3] = 20;
    mouths[4] = 80;
    mouths[5] = 40;
    mouths[6] = 30;
    mouths[7] = 65;
    mouths[8] = 25;
  }

  function _setCostumeRarities() internal {
    costumes[0] = 0;
    costumes[1] = 75;
    costumes[2] = 85;
    costumes[3] = 55;
    costumes[4] = 75;
  }

  function _setHeadAccessoryRarities() internal {
    headAccessories[0] = 0;
    headAccessories[1] = 35;
    headAccessories[2] = 50;

    headAccessories[3] = 20;
    headAccessories[4] = 20;
    headAccessories[5] = 20;
    headAccessories[6] = 20;

    headAccessories[7] = 0;
    headAccessories[8] = 0;
    headAccessories[9] = 0;

    headAccessories[10] = 90;
    headAccessories[11] = 90;
    headAccessories[12] = 90;

    headAccessories[13] = 0;
    headAccessories[14] = 0;
    headAccessories[15] = 0;
    headAccessories[16] = 0;
    headAccessories[17] = 0;

    headAccessories[18] = 35;
    headAccessories[19] = 35;
    headAccessories[20] = 35;
    headAccessories[21] = 35;

    headAccessories[22] = 0;

    headAccessories[23] = 80;

    headAccessories[24] = 0;
    headAccessories[25] = 0;
    headAccessories[26] = 0;

    headAccessories[27] = 70;

    headAccessories[28] = 30;
    headAccessories[29] = 30;
    headAccessories[30] = 30;
    headAccessories[31] = 30;

    headAccessories[32] = 5;
    headAccessories[33] = 5;
    headAccessories[34] = 5;

    headAccessories[35] = 30;
    headAccessories[36] = 30;
    headAccessories[37] = 30;

    headAccessories[38] = 95;

    headAccessories[39] = 40;

    headAccessories[40] = 98;

    headAccessories[41] = 75;

    headAccessories[42] = 15;
    headAccessories[43] = 15;
    headAccessories[44] = 15;
    headAccessories[45] = 15;
  }

  function _setHairRarities() internal {
    hairs[0] = 55;
    hairs[1] = 40;
    hairs[2] = 40;
    hairs[3] = 0;
    hairs[4] = 35;
    hairs[5] = 5;
    hairs[6] = 0;
    hairs[7] = 15;
    hairs[8] = 80;
    hairs[9] = 20;
    hairs[10] = 25;
    hairs[11] = 30;
    hairs[12] = 50;
    hairs[13] = 50;
    hairs[14] = 90;
    hairs[15] = 50;
    hairs[16] = 50;
    hairs[17] = 20;
  }

  function _setSunglassesRarities() internal {
    sunglasses[0] = 0;
    sunglasses[1] = 40;
    sunglasses[2] = 55;
    sunglasses[3] = 80;
    sunglasses[4] = 25;
    sunglasses[5] = 85;
    sunglasses[6] = 25;
    sunglasses[7] = 20;
    sunglasses[8] = 35;
    sunglasses[9] = 10;
    sunglasses[10] = 95;
    sunglasses[11] = 30;
    sunglasses[12] = 70;
    sunglasses[13] = 90;

    sunglasses[14] = 70;
    sunglasses[15] = 80;
    sunglasses[16] = 60;
    sunglasses[17] = 90;
    sunglasses[18] = 60;
    sunglasses[19] = 55;
    sunglasses[20] = 70;
    sunglasses[21] = 55;
    sunglasses[22] = 60;
    sunglasses[23] = 65;
    sunglasses[24] = 85;
  }

  function _setFacialHairRarities() internal {
    facialHairs[0] = 50;
    facialHairs[1] = 0;
    facialHairs[2] = 10;
    facialHairs[3] = 20;
    facialHairs[4] = 50;
    facialHairs[5] = 60;
    facialHairs[6] = 70;
  }

  function _setTraitTable() internal {
    _setBodyRarities();
    _setFaceRarities();
    _setEyesRarities();
    _setNoseRarities();
    _setMouthRarities();

    _setCostumeRarities();
    _setHeadAccessoryRarities();
    _setHairRarities();
    _setSunglassesRarities();
    _setFaceRarities();

    traitTable[0] = themes;
    traitTable[1] = bodies;
    traitTable[2] = faces;
    traitTable[3] = eyes;
    traitTable[4] = noses;
    traitTable[5] = mouths;
    traitTable[6] = costumes;
    traitTable[7] = headAccessories;
    traitTable[8] = hairs;
    traitTable[9] = sunglasses;
    traitTable[10] = facialHairs;
  }

  function _rnd(uint256 _salt, uint256 _nonce) internal view returns (uint256) {
    return uint256(keccak256(abi.encodePacked(block.timestamp, msg.sender, _salt, _nonce)));
  }
}

File 6 of 16 : IThePixelsMetadataProvider.sol
// SPDX-License-Identifier: MIT

// ______  __  __   ______       _____    __  __   _____    ______
// /\__  _\/\ \_\ \ /\  ___\     /\  __-. /\ \/\ \ /\  __-. /\  ___\
// \/_/\ \/\ \  __ \\ \  __\     \ \ \/\ \\ \ \_\ \\ \ \/\ \\ \  __\
//   \ \_\ \ \_\ \_\\ \_____\    \ \____- \ \_____\\ \____- \ \_____\
//    \/_/  \/_/\/_/ \/_____/     \/____/  \/_____/ \/____/  \/_____/
//

pragma solidity ^0.8.0;

interface IThePixelsMetadataProvider {
  function getMetadata(
    uint256 tokenId,
    uint256 dna,
    uint256 dnaExtension
  ) external view returns (string memory);
}

File 7 of 16 : IThePixelsDNAUpdater.sol
// SPDX-License-Identifier: MIT

// ______  __  __   ______       _____    __  __   _____    ______
// /\__  _\/\ \_\ \ /\  ___\     /\  __-. /\ \/\ \ /\  __-. /\  ___\
// \/_/\ \/\ \  __ \\ \  __\     \ \ \/\ \\ \ \_\ \\ \ \/\ \\ \  __\
//   \ \_\ \ \_\ \_\\ \_____\    \ \____- \ \_____\\ \____- \ \_____\
//    \/_/  \/_/\/_/ \/_____/     \/____/  \/_____/ \/____/  \/_____/
//

pragma solidity ^0.8.0;

interface IThePixelsDNAUpdater {
  function canUpdateDNAExtension(
    address _owner,
    uint256 _tokenId,
    uint256 _dna,
    uint256 _dnaExtension
  ) external view returns (bool);

  function getUpdatedDNAExtension(
    address _owner,
    uint256 _tokenId,
    uint256 _dna,
    uint256 _dnaExtension
  ) external returns (uint256);
}

File 8 of 16 : Context.sol
// SPDX-License-Identifier: MIT

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 9 of 16 : ERC721.sol
// SPDX-License-Identifier: MIT

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 {
        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) {
        return _owners[tokenId] != address(0);
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

        _beforeTokenTransfer(from, to, tokenId);

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

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

        emit Transfer(from, to, tokenId);
    }

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

    /**
     * @dev 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 10 of 16 : IERC721Enumerable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC721.sol";

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

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

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

File 11 of 16 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT

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);
}

File 12 of 16 : IERC721Metadata.sol
// SPDX-License-Identifier: MIT

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 13 of 16 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

File 14 of 16 : Strings.sol
// SPDX-License-Identifier: MIT

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 15 of 16 : ERC165.sol
// SPDX-License-Identifier: MIT

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 16 of 16 : IERC165.sol
// SPDX-License-Identifier: MIT

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);
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

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me":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"salesContractAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","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":"_DNAUpdaterContractAddress","type":"address"}],"name":"setDNAUpdaterContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_metadataProviderContractAddress","type":"address"}],"name":"setMetadataProviderContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_salesContractAddress","type":"address"}],"name":"setSalesContract","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":[{"internalType":"address","name":"_owner","type":"address"}],"name":"tokensOfOwner","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint8","name":"","type":"uint8"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"traitTable","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"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"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"updateDNAExtension","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000000000000000000000000000000000000000001400

-----Decoded View---------------
Arg [0] : _maxPixels (uint256): 5120

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000001400


Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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