Contract 0xE3234e57ac38890a9136247EAdFE1860316Ff6ab 2

 
 
Txn Hash
Method
Block
From
To
Value
0x560a98901cf661f847ec10c5d99a568764b5ee34ecef8243d6ff3f85d7f6bdb6Transfer From153209832022-08-11 13:31:101 hr 20 mins ago0x07b6882ef231ad0bf52eddc3f7521656e63af470 IN  MoodRollers: MOODRLS Token0 Ether0.‍00350575 41.‍68699782
0xd49e74eba068f925abb4b848b49d631100c01b2e43cbb3d2ae48022107e8b3d8Set Approval For...153207752022-08-11 12:41:102 hrs 10 mins ago0x6c1930a05d0df55160ecf79f9b6c79bb37837dc6 IN  MoodRollers: MOODRLS Token0 Ether0.‍0011918 25.‍66837483
0x5fffb8196a3e62515310826b603fbd6a658c46411a6f81af476e347f470bb248Set Approval For...153201872022-08-11 10:29:314 hrs 22 mins ago0xa660a7ad59d9529700f13c614403b5929802bae3 IN  MoodRollers: MOODRLS Token0 Ether0.‍00053123 11.‍44144417
0x0150deba244fef2aa57e7b4cb282fd5cca7ee0581a9fd31eb63b378f25da12e8Set Approval For...153200132022-08-11 9:53:104 hrs 58 mins ago0x1f03019642ff38baa814c881087f9e933cf2cdcb IN  MoodRollers: MOODRLS Token0 Ether0.‍00073788 15.‍89209245
0x788345302e4c520ec1c6ca36a9ff3fe4cc317fcadd8719a18af7c79a04d5896cSet Approval For...153196462022-08-11 8:25:046 hrs 26 mins agoENS Name coolntf.eth IN  MoodRollers: MOODRLS Token0 Ether0.‍00045976 9.‍90215248
0x237af77a6febb8a06f8c4940aeeb4dfc46315651478bd54d391c0ddcc4aa7899Set Approval For...153181902022-08-11 2:48:0212 hrs 3 mins agoENS Name limewedge.eth IN  MoodRollers: MOODRLS Token0 Ether0.‍00175387 37.‍77369857
0x42e9bb0b7358f2ba9556249457f2c34e7865172e9e5532affd7f74f58c5c85fbTransfer From153181722022-08-11 2:44:1112 hrs 7 mins ago0xf32beeb4123a29c8a1ffd2692af872cad1d1bff2 IN  MoodRollers: MOODRLS Token0 Ether0.‍00197168 23.‍44871172
0x0ad2224d645ad3442389c5302994ec47edc7cbb0069a2f8c5f5db8e058da6903Set Approval For...153143652022-08-10 12:36:561 day 2 hrs agoENS Name realholder.eth IN  MoodRollers: MOODRLS Token0 Ether0.‍00227837 49.‍07023264
0x5bd19f20edadecd928345a82c952947025cf909e4dba2747bbcbc4f24710e090Transfer From153138832022-08-10 10:46:561 day 4 hrs agoENS Name gabz.eth IN  MoodRollers: MOODRLS Token0 Ether0.‍00092334 10.‍97948944
0xbd27464b0476067604532c513b7590ea1f7f727b518ccb10296b73b03804cc32Set Approval For...153135692022-08-10 9:27:381 day 5 hrs ago0xef186dea3c7fb52a04411a0a94cd35d5f47268fb IN  MoodRollers: MOODRLS Token0 Ether0.‍00035881 7.‍72785366
0xb840266c5bb4e3baca78e3613ecf6a7505d1ae95f4543062f8d9cd230baf1e05Safe Transfer Fr...153134162022-08-10 8:56:151 day 5 hrs ago0xbfef7597bd9a5b2782c6f1936e4ce1ad53dba29e IN  MoodRollers: MOODRLS Token0 Ether0.‍00092114 10.‍27617356
0x5b79676b84ffc9a993e038190cdb2f3821d2e3de74866326217cb1bbf80166d3Set Approval For...153133442022-08-10 8:40:271 day 6 hrs ago0x320a7991c759c4e4ca4432b5df97fea030784c00 IN  MoodRollers: MOODRLS Token0 Ether0.‍00043637 9.‍38131744
0xdc0e6cea520c80821f4b9a25ea351a21bef282ad300d6ab3d2451fd2952f1b0eSet Approval For...153108542022-08-09 23:15:191 day 15 hrs agoENS Name jr286.eth IN  MoodRollers: MOODRLS Token0 Ether0.‍00085991 18.‍48687085
0x3822d945a7e0ff89d6b4e70fc83924aba9b7cacd5e0fdb476540d31f289aa4acSet Approval For...153108042022-08-09 23:04:051 day 15 hrs agoENS Name jr286.eth IN  MoodRollers: MOODRLS Token0 Ether0.‍00164856 54.‍95228636
0x7c4afed50a50369e0c1b49ff45fa7702922348ba1568c3fd1c96713ee70b42dfSet Approval For...153101842022-08-09 20:42:221 day 18 hrs agoENS Name 13104.eth IN  MoodRollers: MOODRLS Token0 Ether0.‍00100393 21.‍62216984
0xcf6e832e75555bfa09f302355c3b8b21d2a6b47fe857b85dbaf6f203f97ca86bTransfer From153101532022-08-09 20:34:131 day 18 hrs ago0x208f4e26021a18cd6ebb9c387f75caa4481aa837 IN  MoodRollers: MOODRLS Token0 Ether0.‍0014403 17.‍12676315
0x1bd195687677292b7ad796f0b5b877e69e29f2e55768f2b4f11b4452134d1ebfSet Approval For...153095742022-08-09 18:34:031 day 20 hrs ago0x22fc02a23fa0cc17ba0b9ed3d079c3b6bf338843 IN  MoodRollers: MOODRLS Token0 Ether0.‍00089425 19.‍25987941
0x569478ec02803c8e51a13847367e0dd191bcd43a86df01cb71a4d3132265c2a9Transfer From153093632022-08-09 17:46:491 day 21 hrs ago0x8d6afa6686ed4aa00e3771879dedb565eead26a6 IN  MoodRollers: MOODRLS Token0 Ether0.‍00325241 34.‍45682869
0xebf0357e92abb6163fb9e9027e6e4ebd4df038e4e57306a712cb296b621f46b6Set Approval For...153089362022-08-09 15:59:151 day 22 hrs ago0x2e80de5546b9cb63be4ab8ae27839eb3db4452b0 IN  MoodRollers: MOODRLS Token0 Ether0.‍00107817 23.‍22098303
0x4fda5c161fb7df1d4d7baf69924ceec85ab67f43a34a676d64f452616276f68dSet Approval For...153076922022-08-09 11:21:252 days 3 hrs ago0x887825b3ab2778ef1c2195c34e3dfee527d02414 IN  MoodRollers: MOODRLS Token0 Ether0.‍00072983 15.‍71880341
0xa2b487e4e94e1c13067b4fd2120ac26fa764ad98ea90116c3bbb248e0669a30aSet Approval For...153042692022-08-08 22:27:312 days 16 hrs agoENS Name bonglo.eth IN  MoodRollers: MOODRLS Token0 Ether0.‍00057842 12.‍4576939
0x45ea656fa5ca40cda42e9484a780aa8aae0cf08b840c98046df719c9210da709Set Approval For...152996322022-08-08 5:06:223 days 9 hrs ago0x10a70b1b985f01dc960e6c106fb7ff78a5ef3ff4 IN  MoodRollers: MOODRLS Token0 Ether0.‍00032128 6.‍91957806
0x51ece1e710f727cba6ff23ded92e3b4f7a32eba1fdf7a1362c27546e44e82c89Transfer From152990962022-08-08 3:02:463 days 11 hrs ago0xa32e81e29893a0bc8326199eb64bc82558536acf IN  MoodRollers: MOODRLS Token0 Ether0.‍00119016 14.‍15223339
0x50da1c4077a247806a695767c3540532b4e8644b73b396a51d1343e5e9545d95Transfer From152976072022-08-07 21:27:093 days 17 hrs ago0xb61953ea02542eb22c07b5b8c2a9fe082ad250d4 IN  MoodRollers: MOODRLS Token0 Ether0.‍00120394 16.‍13937744
0x3f7c4946dd3a2734b84410e4f4a1227bd2c4fb507c437dbc31d8ea18da7ce988Transfer From152975952022-08-07 21:22:513 days 17 hrs ago0xb61953ea02542eb22c07b5b8c2a9fe082ad250d4 IN  MoodRollers: MOODRLS Token0 Ether0.‍00089423 9.‍20083044
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OVERVIEW

5.000 randomly generated, unique, animated, never stopping characters on the Ethereum blockchain.

Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x7ffde055716dc649d9fbc515a52be492b4ca2a0bcd701043ac824e760ad5c74a137795112021-12-10 20:09:37243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍09 Ether
0x5533c21f64617198b7928ff1f97f9b1ee21f69caebbf400fa03b4a9208515eb4137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍18 Ether
0xb152e178cd6cb3dd94f648b4d3f2f081c87e81c4759b5e1299a09d70028e4570137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍18 Ether
0x6751ff6da015cb809e19c6e8dffd231c30e45f4c57d20ad4fe77c576fec67973137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍18 Ether
0x29b2452cde224f54312e0fb2f3ee85af5b33e2ba4667a728f67ea6c96f8cf974137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍09 Ether
0xb22ce3b72ae26a7fad915be75717c628ee288f97ef192820b8606aac66f2a9d8137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍09 Ether
0x4807a5fb998d0a26fd9fcc79ad79c20391b0370f7468486c7a7053105fee7496137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍27 Ether
0x131ba22b041068ceb64da897de951ccc311960d4c6235e3d1a5233c599c77485137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍27 Ether
0xed8f15a55d1c4257b2afa2979a1737bf49a9cdad4ad20c62fb4cddf150bcdff1137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍09 Ether
0x2f75945e84fd4be294b91d22736c8e2653c8bb6caea0434e89c9efe7eeccada7137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍09 Ether
0x42e1fd8e746fe02601165f73700fdbbaae3d2ac2c54f71e3d0261682930fd530137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍27 Ether
0x2d390749a4e717e27a9f58f01285836682e699859e9939f43fd3f3d393aca7bc137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍09 Ether
0xbed28d46c5aa1adf4f776c671baedc980fc5fbefbc92d9b4745cb1b90abe6c13137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍09 Ether
0x651ab7f96146e081a2c1225674f0f97da7b5567c4d5c0afa9601080f447bba92137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍27 Ether
0xdcfe78751365b299a902c1145fb307b33a433100e09b34a52be74ea451cb0153137795102021-12-10 20:09:33243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍18 Ether
0x253adb75539872d7ad0d305fc57e9c6aea50dd80084f976db05fc45ba4188be4137795092021-12-10 20:09:29243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍18 Ether
0xd08aec1b76c990d2542fa8a1ee58685f24a8b47d20197198f336c5f6b4ab1c50137795092021-12-10 20:09:29243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍09 Ether
0x68a8ad2fe1972824ac9db7123a60a71c60f04de998d75f9bf9d884c35a3f08cb137795092021-12-10 20:09:29243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍27 Ether
0xb4d9d440966ce69039444efd8ea9c88efde6abfd59b9b357260a8f46dbcc2af0137795092021-12-10 20:09:29243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍27 Ether
0x1290707a5eb5bf40281c2dfbd4cfdc9be39dd3859437aac6bbbbff3f715702e3137795092021-12-10 20:09:29243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍09 Ether
0x8825f0dfef4713c969f52f96178f777a77e6b1652e14234c4c56bca0cffe1abc137795092021-12-10 20:09:29243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍09 Ether
0x8b65f8b78ccfd23cb84f7f8eff3942ac38a41d856daa55dd5da38246f97e9aea137795092021-12-10 20:09:29243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍27 Ether
0x27839a0473e10df1e91a2de4300a2c846464bc4d5894ada7ae050377da8ceaee137795092021-12-10 20:09:29243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍09 Ether
0xce7aa53ce9ef69a8b9ef630ff0afd4715aaf1b5bf8bdd86245ff9b4626e96e4c137795092021-12-10 20:09:29243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍27 Ether
0x855a274279f89f8a9c122ff1437231528611c3157e3e24af43cc3e384ae46f32137795082021-12-10 20:09:10243 days 18 hrs ago MoodRollers: MOODRLS Token 0x2284f6f27ec1196d887d9290a250450429c856860.‍18 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
MoodRollers

Compiler Version
v0.8.2+commit.661d1103

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 14 : MoodRollers.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;

/*****************************************************************\
*       __  ___                ______        ____                 *
*      /  |/  /___  ____  ____/ / __ \____  / / /__  __________   *
*     / /|_/ / __ \/ __ \/ __  / /_/ / __ \/ / / _ \/ ___/ ___/   *
*    / /  / / /_/ / /_/ / /_/ / _, _/ /_/ / / /  __/ /  (__  )    *
*   /_/  /_/\____/\____/\__,_/_/ |_|\____/_/_/\___/_/  /____/     *
*                                                                 *
\*****************************************************************/

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

contract MoodRollers is ERC721, ERC721Enumerable, Ownable {
  uint256 constant MAX_SUPPLY = 5000;
  uint256 constant MAX_PER_TRANSACTION = 3;

  string public baseURI = "https://moodrollers.com/api/";
  string private _contractURI = "https://moodrollers.com/api/contracts/MoodRollers";

  enum SaleState {
    Closed,
    Presale,
    Public
  }

  SaleState public saleState = SaleState.Closed;

  uint256 public presalePrice = 0.075 ether;
  uint256 public publicSalePrice = 0.09 ether;

  mapping(address => uint256) private _presaleList;

  address public beneficiary;

  constructor(address _beneficiary) ERC721("MoodRollers", "MOODRLS") {
    beneficiary = _beneficiary;
  }

  // •[email protected]☻@-• Accessors

  function setBeneficiary(address _beneficiary) public onlyOwner {
    beneficiary = _beneficiary;
  }

  function setSaleState(SaleState state) public onlyOwner {
    saleState = state;
  }

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

  function _baseURI() internal view override returns (string memory) {
    return baseURI;
  }

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

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

  // •[email protected]☻@-• Presale

  function remainingPresaleMints(address _address) public view returns (uint256) {
    return _presaleList[_address];
  }

  function addPresaleAddresses(address[] memory addresses, uint256 reservedAmount) public onlyOwner {
    for (uint256 i = 0; i < addresses.length; i++) {
      _presaleList[addresses[i]] = reservedAmount;
    }
  }

  // •[email protected]☻@-• Minting

  function _internalMint(address destination, uint256 count) private {
    uint256 currentSupply = totalSupply();

    require(currentSupply + count <= MAX_SUPPLY, "Maximum supply exceeded");

    for (uint256 i = 1; i <= count; i++) {
      _safeMint(destination, currentSupply + i);
    }
  }

  function mintPresaleRollers(uint256 amount) public payable {
    require(saleState == SaleState.Presale, "Presale is closed");

    uint256 reservedAmount = _presaleList[_msgSender()];
    require(reservedAmount > 0, "No presale rollers left");
    require(amount <= reservedAmount, "Trying to mint more than allotted");
    require(msg.value == presalePrice * amount, "Incorrect payable amount");

    _presaleList[_msgSender()] = reservedAmount - amount;

    _internalMint(_msgSender(), amount);

    payable(beneficiary).transfer(msg.value);
  }

  function mintRollers(uint256 amount) public payable {
    require(saleState == SaleState.Public, "Public sale is closed");
    require(amount <= MAX_PER_TRANSACTION, "At most 3 per transaction");
    require(msg.value == publicSalePrice * amount, "Incorrect payable amount");

    _internalMint(_msgSender(), amount);

    payable(beneficiary).transfer(msg.value);
  }

  // •[email protected]☻@-• Required overrides

  function _beforeTokenTransfer(
    address from,
    address to,
    uint256 tokenId
  ) internal override(ERC721, ERC721Enumerable) {
    super._beforeTokenTransfer(from, to, tokenId);
  }

  function supportsInterface(bytes4 interfaceId) public view override(ERC721, ERC721Enumerable) returns (bool) {
    return super.supportsInterface(interfaceId);
  }
}

File 2 of 14 : ERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

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

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

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        _approve(to, tokenId);
    }

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

        return _tokenApprovals[tokenId];
    }

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

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

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

        _transfer(from, to, tokenId);
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        _beforeTokenTransfer(from, to, tokenId);

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

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

        emit Transfer(from, to, tokenId);
    }

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

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

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

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

File 3 of 14 : ERC721Enumerable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/ERC721Enumerable.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

File 4 of 14 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 5 of 14 : Counters.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Counters.sol)

pragma solidity ^0.8.0;

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

File 6 of 14 : IERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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`, 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 7 of 14 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

File 8 of 14 : IERC721Metadata.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 9 of 14 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Address.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

File 10 of 14 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 11 of 14 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 12 of 14 : ERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 13 of 14 : IERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 14 of 14 : IERC721Enumerable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 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);
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200,
    "details": {
      "yul": false
    }
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

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MoodRollers.SaleState","name":"","type":"uint8"}],"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":"string","name":"uri","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_beneficiary","type":"address"}],"name":"setBeneficiary","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"uri","type":"string"}],"name":"setContractURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"enum MoodRollers.SaleState","name":"state","type":"uint8"}],"name":"setSaleState","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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

0000000000000000000000009e2de3bd03edbb4210b3d1aa30f16ea4cac17138

-----Decoded View---------------
Arg [0] : _beneficiary (address): 0x9e2de3bd03edbb4210b3d1aa30f16ea4cac17138

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000009e2de3bd03edbb4210b3d1aa30f16ea4cac17138


Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.