Contract 0x20Bd0551f05Dc40117D6B91DFA9f67D25307d1D8 3

 
Txn Hash
Method
Block
From
To
Value
0x1afdf7a9fa82c344b189aa3cc5b0aef0d68c2235a4522f1dead648dc12d2f568Set Approval For...152958592022-08-07 15:02:4026 mins ago0x58a533f1e255a411a0340fadd8c97b1c67729f00 IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00045712 9.91618969
0xc06ace0c54a629584daf868d98f1fe401eadb4deb911232d1106830df1eca13cSet Approval For...152950782022-08-07 12:12:223 hrs 16 mins ago0x9820c366ad2a0b77bffe9239634e377b871ffbd9 IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00117474 25.44985834
0xc8a4f67937a462f253484ba9d96d6a87485da3b4a903114bd76290d3288d5684Transfer From152947852022-08-07 11:05:264 hrs 23 mins ago0x8f2a8b27ffcce8b946724160b49abe06ac54e8b0 IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00030909 8.18008826
0x7ea67e7134d52e5b070212ef64e63b3a72a28d6ccdc3f0cab925b5c2a0eeed08Set Approval For...152937472022-08-07 7:11:368 hrs 17 mins ago0x112d62b9b1deaa943e8befb7270a9167c7b95838 IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00019574 4.24064636
0xd50b27a968368ff0667408e9afe539298df4d59790063fa3ad0d04f51cc9eed8Set Approval For...152919312022-08-07 0:17:2515 hrs 11 mins agoENS Name 0077.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00017535 3.79802689
0xb264ca5e12102f787a2fc4e7286dd41a129791359a7d454caccb0732607b139dSet Approval For...152908622022-08-06 20:25:0619 hrs 3 mins ago0x000e8267ae3f008d33558a9f6f4a6c0f8410ac5a IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00043699 9.47945174
0x0c71d6e8983a3e4f62c82343c89ed3ecd4219796db399bcaa8bb38bebc7bd282Set Approval For...152864322022-08-06 3:48:031 day 11 hrs agoENS Name deseee.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00041631 9.01457182
0x370384f43d2e406d2e03337a47dc6165d340cc7e545ca6aa21a03c527d984ef6Set Approval For...152864302022-08-06 3:47:331 day 11 hrs agoENS Name deseee.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00041409 8.96631571
0x0ef9804f1186b42e90e03631750a70a15fec0782e85b07b512a024b14d7ab38eSet Approval For...152864302022-08-06 3:47:331 day 11 hrs agoENS Name deseee.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00041333 8.96631571
0x188f510c6b8ea4b19e01e8cd4891b47253b9c03fd2a41611d8f5efab28a5e7a2Set Approval For...152849562022-08-05 22:15:451 day 17 hrs agoENS Name gonzz.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00024711 10.1914195
0x3c4c44b16ad53ec7ff0c015b1e25c23d1406287eab2eb5e1d4562595dca05c45Set Approval For...152849562022-08-05 22:15:451 day 17 hrs agoENS Name gonzz.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00024735 10.1914195
0xcc9eb144ad8a10930c4a9e314030c30e0c39498a79894df8d3cfd32ff745ba69Set Approval For...152842812022-08-05 19:45:221 day 19 hrs ago0xc39ca6d6344ee1279d9db19cf1ad40c3284a1663 IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00031455 12.96005927
0x914583a5eb92cb709795ffd0816a25343cae377ba530ff93d27f2013f8ee290cSet Approval For...152837582022-08-05 17:51:471 day 21 hrs ago0x3483e9e549428bd52b823d52b2d25bcf136f606c IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00092458 20.05659822
0xb2afc12503f5e1cd0baabbe8b1e6882866cb0e1937526b42bb893c0d3b9e9050Set Approval For...152833452022-08-05 16:16:131 day 23 hrs ago0x00cbb096748660aee7363b6980549337ca92d3e1 IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00109107 23.66808487
0x92ce0423390b50e39a19bafefad4ebc44bc7a8fd6492af439375fe897ac09270Set Approval For...152809562022-08-05 7:25:012 days 8 hrs ago0x90a66241064ce979240f5049ab227b567ede90b4 IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00062004 13.4501844
0x628454d888aa32459eb1a2996a4b87f2426e9fe07afaffc501e3f3238a368bd9Set Approval For...152785782022-08-04 22:42:202 days 16 hrs ago0x11ba2058c71c681e6995b45db3d3b3a43f8032df IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00061789 13.40371295
0x166b8980c2cbfd42a770273dfb2295d4b037acc379634bf4968872279e51e9c6Transfer From152778382022-08-04 19:49:352 days 19 hrs agoENS Name albertohofman.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00043649 11.55181459
0xff102bd0b0199fff1bb784e2a735c0b5f48461182f80cdad2ae12ce4fabe74c4Set Approval For...152700492022-08-03 14:39:204 days 49 mins agoENS Name 7842.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00092225 20.00600809
0xa5435f453a30402934c01b874b907f31e38d69337e745b5332d2cc555d1c02e7Set Approval For...152696252022-08-03 13:04:574 days 2 hrs agoENS Name mrmetaverseman.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.0006839 14.83561952
0x2e4a50234c8f3b0ff8c0d8f0ea59e018a1246e847759610f15140792e8f306deSet Approval For...152692512022-08-03 11:41:304 days 3 hrs ago0x8d38a6a591e9f3903c5183fe36b294d10d760f92 IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00042959 9.3190072
0xfb3cd4aeb9ab1ec881404806d0a80709db25dd37316f975f3dbbb47c2300991fSet Approval For...152671082022-08-03 3:36:544 days 11 hrs ago0x18ffada00dab4b5c8cd707e1501acd1835fff5bd IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00040525 8.79097699
0x84f0ee245cbf2430bd03a752f477fd22cea74d764df849d826e32269659fc11fSet Approval For...152667302022-08-03 1:58:534 days 13 hrs agoENS Name kevgenki.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00035503 7.70157131
0xa99a6317f40414f34800b1871e3612af6e3c373ce099585d088c353c7fd9cca6Set Approval For...152664252022-08-03 0:50:384 days 14 hrs agoENS Name stonerdaly.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00014812 6.10292847
0x16288d50d6abb57b08a3063b8f28a3d5aa2a3e02d890c05268e32af82a048e50Set Approval For...152651982022-08-02 20:19:304 days 19 hrs agoENS Name stooch.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00051092 11.06583421
0xe2f425d2ba9cbcca9b74b9e74d1823b9c13a14b9c31d32c5d1cbf833e5339b0aSet Approval For...152636572022-08-02 14:29:185 days 59 mins agoENS Name bellydance.eth IN  0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80 Ether0.00059591 12.9033038
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0x884e2d9148df5da9141b3364351548ef55be7e13d605cd84baca26f30d26e7a6145281772022-04-05 20:47:52123 days 18 hrs ago 0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80x8eea5624bae3495c39f645302c99bb56595c5a9e20.3252 Ether
0x80d6a85c79c7aabd28607467ee1c3ca271a4f56ffabef283ac010c8c96cdc2d3144907402022-03-31 0:26:38129 days 15 hrs ago 0x20bd0551f05dc40117d6b91dfa9f67d25307d1d80x8eea5624bae3495c39f645302c99bb56595c5a9e607.4236 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
AbnormalJean

Compiler Version
v0.8.7+commit.e28d00a7

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 14 : AbnormalJean.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.7;

import "./utils/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
                                                                    
/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension and Enumerable extension.
*/
contract AbnormalJean is Context, ERC721Enumerable, Ownable, ReentrancyGuard  {
  using Strings for uint256;
  using ECDSA for bytes32;

  // Base URI
  string private _jeanBaseURI;

  // Max number of NFTs and restrictions per wallet
  uint256 public constant MAX_SUPPLY = 8888;
  uint256 public constant RESERVED_TOKENS = 4444;
  uint256 public constant TEAM_TOKENS = 28;
  uint256 public maxPerWallet;
  uint256 public tokenPrice;

  // Sale settings
  bool public metadataFinalised;
  bool public revealed;

  // Address to validate WL
  address public signerAddress;
  address public constant TEAM_WALLET = 0xf71a729fd5C58Fa1096CcE576690d0cd4dEB4eb8;

  // Mint pass contracts
  IERC721 public MetroPass;
  IERC721 public Passport;

  // Royalty info
  address public royaltyAddress;
  uint256 private ROYALTY_SIZE = 1000;
  uint256 private ROYALTY_DENOMINATOR = 10000;
  mapping(uint256 => address) private _royaltyReceivers;

  // Stores the tokenIds used for minting JEAN
  mapping(address => mapping(uint256 => bool)) public mintPassUsed;
  uint256 public totalMintPassesUsed;

  // Stores the number of minted tokens by user
  mapping(address => uint256) public _mintedByAddress;

  enum Statuses {
    Inactive,
    Claim,
    Whitelist,
    Public
  }

  Statuses public currentStatus;

  // Contract Events
  event TokensMinted(address indexed mintedBy,uint256 indexed tokensNumber);
  event BaseUriUpdated(string oldBaseUri,string newBaseUri);
  event Claim(address indexed claimedBy,address mintPassAddress,uint256 tokenId);

  constructor(address _royaltyAddress, address _signer, string memory _baseURI)
  ERC721("Abnormal Jean", "JEAN")
  {
    royaltyAddress = _royaltyAddress;
    signerAddress = _signer;
    _jeanBaseURI = _baseURI;

    MetroPass = IERC721(0x8338D085aAe3aC048b9e1DE285fDef508CE73E45);
    Passport = IERC721(0xfB97f535d5bEF03599861929324ad019203aE617);

    currentStatus = Statuses.Inactive;

    maxPerWallet = 3;
    tokenPrice = 0.1666 ether;
  }


  function claim(
    uint256[] calldata metroPassIds,
    uint256[] calldata passportIds,
    uint256 paidTokensToMint
  ) public payable nonReentrant {
    require(currentStatus == Statuses.Claim || currentStatus == Statuses.Whitelist, "Sale is not active");
    require(metroPassIds.length > 0 || passportIds.length > 0, "Should provide at least one token ID to claim");
    require(paidTokensToMint <= metroPassIds.length + passportIds.length, "You can only mint one additional token per mintpass");

    if (metroPassIds.length > 0) {
      _mintForMintPass(metroPassIds, address(MetroPass));
    }
    if (passportIds.length > 0) {
      _mintForMintPass(passportIds, address(Passport));
    }

    if (paidTokensToMint > 0 && currentStatus == Statuses.Claim) {
      require(totalSupply() + paidTokensToMint <= MAX_SUPPLY - (RESERVED_TOKENS - totalMintPassesUsed), "Try to mint more than max allowed");
      require(msg.value == paidTokensToMint * tokenPrice, "Incorrect value provided");
      for (uint256 i; i < paidTokensToMint; i++) {
        _mint(_msgSender(), totalSupply());
      }
    }
  }

  // Public function to purchase JEAN tokens
  function purchase(uint256 tokensNumber, bytes calldata signature) public payable nonReentrant {
    require(tokensNumber > 0, "Wrong amount requested");
    require(currentStatus == Statuses.Whitelist || currentStatus == Statuses.Public, "Sale is not active");
    
    if (currentStatus == Statuses.Whitelist) {
      require(_validateSignature(signature, _msgSender()), "Your wallet is not whitelisted");
      require(totalSupply() + tokensNumber <= MAX_SUPPLY - (RESERVED_TOKENS - totalMintPassesUsed), "Try to mint more than max allowed");
    }
    if (currentStatus == Statuses.Public) {
      require(totalSupply() + tokensNumber <= MAX_SUPPLY, "You tried to mint more than the max allowed");
    }

    if (_msgSender() != owner()) {
      require(_mintedByAddress[_msgSender()] + tokensNumber <= maxPerWallet, "You have hit the max tokens per wallet");
      require(tokensNumber * tokenPrice == msg.value, "You have not sent enough ETH");
      _mintedByAddress[_msgSender()] += tokensNumber;
    }

    for(uint256 i = 0; i < tokensNumber; i++) {
      _safeMint(_msgSender(), totalSupply());
    }

    emit TokensMinted(_msgSender(), tokensNumber);
  }

  function _mintForMintPass (uint256[] calldata tokenIds, address mintPass) internal {
    for (uint256 i; i < tokenIds.length; i++) {
      require(IERC721(mintPass).ownerOf(tokenIds[i]) == _msgSender(), "Not the owner");
      require(!mintPassUsed[mintPass][tokenIds[i]], "Token has already been used");
      mintPassUsed[mintPass][tokenIds[i]] = true;
      totalMintPassesUsed++;
      _mint(_msgSender(), totalSupply());
      emit Claim(_msgSender(), mintPass, tokenIds[i]);
    }
  }

  // Public function to validate whether user witelisted agains contract
  function checkIfWhitelisted(bytes calldata signature, address caller) public view returns (bool) {
      return (_validateSignature(signature, caller));
  }

  // Internal function to validate whether user witelisted
  function _validateSignature(bytes calldata signature, address caller) internal view returns (bool) {
    bytes32 dataHash = keccak256(abi.encodePacked(caller));
    bytes32 message = ECDSA.toEthSignedMessageHash(dataHash);

    address receivedAddress = ECDSA.recover(message, signature);
    return (receivedAddress != address(0) && receivedAddress == signerAddress);
  }

  // EIP-2981: NFT Royalty Standard
  function royaltyInfo(uint256 _tokenId, uint256 _salePrice) external view returns (address receiver, uint256 royaltyAmount) {
    uint256 amount = _salePrice * ROYALTY_SIZE / ROYALTY_DENOMINATOR;
    address royaltyReceiver = _royaltyReceivers[_tokenId] != address(0) ? _royaltyReceivers[_tokenId] : royaltyAddress;
    return (royaltyReceiver, amount);
  }

  // EIP-2981: NFT Royalty Standard
  function addRoyaltyReceiverForTokenId(address receiver, uint256 tokenId) public onlyOwner {
    _royaltyReceivers[tokenId] = receiver;
  }

  /// Admin function to update sale status. 0 - Inactive, 1 - Claim, 2 - Whitelist, 3 - Public
  function updateSaleStatus(uint256 saleStatus) public onlyOwner {
    currentStatus = Statuses(saleStatus);
  }

  // Publc funcition that returns token URI
  function tokenURI(uint256 tokenId) external view virtual override returns (string memory) {
    require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
    if (!revealed) return _jeanBaseURI;
    return string(abi.encodePacked(_jeanBaseURI, tokenId.toString(), ".json"));
  }

  /*
  * ADMIN FUNCTIONS
  */

  // Function to mint 28 tokens for the team
  function teamMint() public onlyOwner {
    require(totalSupply() + TEAM_TOKENS <= MAX_SUPPLY, "You tried to mint more than the max allowed");

    for(uint256 i = 0; i < TEAM_TOKENS; i++) {
      _safeMint(TEAM_WALLET, totalSupply());
    }
    emit TokensMinted(TEAM_WALLET, TEAM_TOKENS);
  }
  
  // Updates token sale price
  function updateTokenPrice(uint256 _newPrice) public onlyOwner {
    require(currentStatus == Statuses.Inactive, "Pause sale before price update");
    tokenPrice = _newPrice;
  }

  // Sets base URI
  function setBaseURI(string memory newBaseURI) public onlyOwner {
    require(!metadataFinalised, "Metadata already finalised");

    string memory currentURI = _jeanBaseURI;
    _jeanBaseURI = newBaseURI;
    emit BaseUriUpdated(currentURI, newBaseURI);
  }

  // Freezes metadata, i.e. makes it impossible to change baseURI
  function finalizeMetadata() public onlyOwner {
    require(!metadataFinalised, "Metadata already finalised");
    metadataFinalised = true;
  }

  // Reveals metadata, after calling returns not just baseURI, but baseURI + Token ID
  function revealMetadata() public onlyOwner {
    revealed = true;
  }

  // Updates limit for mint per wallet (by deafult it's 1)
  function updateMaxToMint(uint256 _max) public onlyOwner {
    maxPerWallet = _max;
  }

  // Updates metropass address
  function setMetropassAddress(address _address) public onlyOwner {
    MetroPass = IERC721(_address);
  }
  
  // Updates passport address
  function setPassportAddress(address _address) public onlyOwner {
    Passport = IERC721(_address);
  }

  // Withdraws collected ether from the contract to the owner address
  function withdraw() external onlyOwner {
    uint256 balance = address(this).balance;
    payable(owner()).transfer(balance);
  }
}

File 2 of 14 : ERC721Enumerable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.7;

import "./ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";

/**
 * @dev This implements an optional extension of {ERC721} defined in the EIP that adds
 * enumerability of all the token ids in the contract as well as all token ids owned by each
 * account but rips out the core of the gas-wasting processing that comes from OpenZeppelin.
 */
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
        return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
    }

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

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

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

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

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

File 3 of 14 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 4 of 14 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

File 5 of 14 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

File 6 of 14 : ECDSA.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

File 7 of 14 : ERC721.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.7;

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

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

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

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

    mapping(uint256 => address) private _tokenApprovals;
    mapping(address => mapping(address => bool)) private _operatorApprovals;

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

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

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

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

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

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

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

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

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

        _approve(to, tokenId);
    }

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

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved)
        public
        virtual
        override
    {
        require(operator != _msgSender(), "ERC721: approve to caller");

        _operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_msgSender(), operator, approved);
    }

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

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

        _transfer(from, to, tokenId);
    }

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

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

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

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

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

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

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

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

        _beforeTokenTransfer(address(0), to, tokenId);
        _owners.push(to);

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

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

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

        // Clear approvals
        _approve(address(0), tokenId);
        _owners[tokenId] = address(0);

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

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

        _beforeTokenTransfer(from, to, tokenId);

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

        emit Transfer(from, to, tokenId);
    }

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

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

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

File 8 of 14 : IERC721Enumerable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

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

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

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

File 9 of 14 : IERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

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

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

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

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

File 10 of 14 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

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

File 11 of 14 : IERC721Metadata.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

File 12 of 14 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

File 13 of 14 : ERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

File 14 of 14 : IERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

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

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"_royaltyAddress","type":"address"},{"internalType":"address","name":"_signer","type":"address"},{"internalType":"string","name":"_baseURI","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"oldBaseUri","type":"string"},{"indexed":false,"internalType":"string","name":"newBaseUri","type":"string"}],"name":"BaseUriUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"claimedBy","type":"address"},{"indexed":false,"internalType":"address","name":"mintPassAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Claim","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"mintedBy","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokensNumber","type":"uint256"}],"name":"TokensMinted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"MAX_SUPPLY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MetroPass","outputs":[{"internalType":"contract IERC721","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"Passport","outputs":[{"internalType":"contract IERC721","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"RESERVED_TOKENS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TEAM_TOKENS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TEAM_WALLET","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"_mintedByAddress","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"addRoyaltyReceiverForTokenId","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"signature","type":"bytes"},{"internalType":"address","name":"caller","type":"address"}],"name":"checkIfWhitelisted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"metroPassIds","type":"uint256[]"},{"internalType":"uint256[]","name":"passportIds","type":"uint256[]"},{"internalType":"uint256","name":"paidTokensToMint","type":"uint256"}],"name":"claim","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"currentStatus","outputs":[{"internalType":"enum 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":"uint256","name":"tokenId","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenPrice","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":"totalMintPassesUsed","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":"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":"_max","type":"uint256"}],"name":"updateMaxToMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"saleStatus","type":"uint256"}],"name":"updateSaleStatus","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_newPrice","type":"uint256"}],"name":"updateTokenPrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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0000003f2c152b91d1ca6ab86a94f113e778aa2ee8dffc00000000000000000000000000000000000000000000000000000000000000600000000000000000000000000000000000000000000000000000000000000035697066733a2f2f516d613438673576386a7457764c6e4a5657416d32504e376e5578474a6b707870465170755537566b6e374175430000000000000000000000

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

000000000000000000000000f71a729fd5c58fa1096cce576690d0cd4deb4eb80000000000000000000000003f2c152b91d1ca6ab86a94f113e778aa2ee8dffc00000000000000000000000000000000000000000000000000000000000000600000000000000000000000000000000000000000000000000000000000000035697066733a2f2f516d613438673576386a7457764c6e4a5657416d32504e376e5578474a6b707870465170755537566b6e374175430000000000000000000000

-----Decoded View---------------
Arg [0] : _royaltyAddress (address): 0xf71a729fd5c58fa1096cce576690d0cd4deb4eb8
Arg [1] : _signer (address): 0x3f2c152b91d1ca6ab86a94f113e778aa2ee8dffc
Arg [2] : _baseURI (string): ipfs://Qma48g5v8jtWvLnJVWAm2PN7nUxGJkpxpFQpuU7Vkn7AuC

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 000000000000000000000000f71a729fd5c58fa1096cce576690d0cd4deb4eb8
Arg [1] : 0000000000000000000000003f2c152b91d1ca6ab86a94f113e778aa2ee8dffc
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000035
Arg [4] : 697066733a2f2f516d613438673576386a7457764c6e4a5657416d32504e376e
Arg [5] : 5578474a6b707870465170755537566b6e374175430000000000000000000000


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.