Contract 0x7bb469Bb31c809B5bFfe805CFFEcb3d88889a3Eb

 
 
Txn Hash
Method
Block
From
To
Value
0x43840f225afc6c940f6f7d4aee6671b3fb55bc98408d071327941d4664a5f63cSafe Transfer Fr...160457712022-11-25 8:20:593 days 2 hrs ago0x2c89629d0c4a8d16fdd10950cf7554464798a60b IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00067754 10.38062724
0xf0245778a9752e67dab2cdff0c1038c4be9051d63dfa43c637b5980b156013c2Transfer From160346502022-11-23 19:02:114 days 16 hrs ago0xe6f23cd41f3dae0a4c899b78d32e4d1e16522d43 IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00171709 19.57981596
0xd3920cd06a40e7f4a18ebc7f95561c1d0977d519ef285e77373373c37af4cd42Set Approval For...159956352022-11-18 8:14:4710 days 2 hrs ago0x7206b857cec61f5bfcef563f9d8877da2a91dd83 IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00061107 13.25965302
0xa5ae37d8226803ece91db0db1b408191491ea1164a52c7d5f36a9aea48c35f15Transfer From159034072022-11-05 11:05:5923 days 1 min ago0xa1adc80f474f4bf5a98c1b392626db9216b1dd0b IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.0004987 11.01046906
0x2b8c4d6c0207dc86a1509e78473ca413e58e2244dbd08db9e709b6b6f616f4c3Transfer From159034072022-11-05 11:05:5923 days 1 min ago0xa1adc80f474f4bf5a98c1b392626db9216b1dd0b IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00055155 11.01046906
0x0d58399b8d19af0c734de44c9c5eade8800150c9dc0a843fa66e53a0a34e0e89Set Approval For...158790542022-11-02 1:28:2326 days 9 hrs agoENS Name m8a.eth IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00048664 10.55433074
0xdbda06f4e7f2aa88d514ff0d80c941008eb199a262ce56818e3fc77f46e66c52Transfer From158626402022-10-30 18:22:2328 days 16 hrs ago0xa1adc80f474f4bf5a98c1b392626db9216b1dd0b IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00052728 7.84727275
0x21cb2e1918d5befd8ecbbf8b598ef944751781a8f98dc9965a1fb8b39eddadf1Set Approval For...158205072022-10-24 21:04:5934 days 14 hrs ago0x5d2db70579cde0b81c1d93cff61cc4174b034df0 IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00066399 14.40052538
0x3ff1a8e3fcae57e70b03c27fc89bfad6b6917b88f18eadf65607471da70e199cSet Approval For...158142482022-10-23 23:59:5935 days 11 hrs ago0xb75a4f032738c6c15c8fc830ed55bc92dcd97755 IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.0004966 10.7703256
0xd07bc424e988540d6a7a1a597123a5e904be665dd10af0c350456396ee179b0aSet Approval For...158056752022-10-22 19:15:4736 days 15 hrs agoENS Name burnpile.eth IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00093359 20.24763506
0xa176a38d801473f4d0c864556b41fd6203ef6d8462eaccab72d2ccbdf7d49cccSet Approval For...157897292022-10-20 13:52:4738 days 21 hrs agoENS Name paulf.eth IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00244323 52.98833279
0xd6a0bec4eb1dc5b01689756ddd7bcd830564172117ef451469bd797b1cf47e38Set Approval For...157885222022-10-20 9:49:4739 days 1 hr agoENS Name babetheblueox.eth IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00082722 17.94062379
0x659e32c5647d87e00278f0a4e8a05577fcf13780474c5e7f2b824af8c7cef324Set Approval For...157851282022-10-19 22:27:2339 days 12 hrs ago0x672c9482449e07f94121e3088723a797a7b5635b IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00140473 30.46545053
0x968df340cf0aef6c0bbdd71c0c42205dbf80f6f3185db0c4956c083119080ed2Set Approval For...157849982022-10-19 22:01:1139 days 13 hrs agoENS Name godmonk.eth IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00216592 46.97394754
0xd154ec79aff3a86fcba9bdcfaab36e543ec6ab06c1cb3bac13c93f89b1209786Set Approval For...157845652022-10-19 20:34:2339 days 14 hrs ago0x9dea4b52554f20f0c3e87c847f13ca482633b302 IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00162077 35.15096933
0x99049c9ebd1deddea97d0d89957d96a3d08a2cdb733d529953dfb233ad61a4acSet Approval For...157843332022-10-19 19:47:1139 days 15 hrs ago0xcbdd639a899a69458f3acc23f47d59603d116449 IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00165797 35.91098512
0x16001a3c61d0d3558a0aa45cba169c939d654eb6bda337c51f1ef68f18710e59Set Approval For...157843322022-10-19 19:46:5939 days 15 hrs ago0xcbdd639a899a69458f3acc23f47d59603d116449 IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00154823 33.57766935
0x28e0383c26123d32cd451adf89cbe3d813b6d0b708e23301466319f76cc72f6bSet Approval For...157840672022-10-19 18:52:5939 days 16 hrs agoENS Name buttersauce.eth IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00196147 42.56211232
0x51a620cfe2a993e6d9790846432a41280af65eb6ef04e195c4c2f03ad9226ba0Set Approval For...157840662022-10-19 18:52:4739 days 16 hrs agoENS Name buttersauce.eth IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00184352 39.92984713
0x82dc6d32343c4260ffb1a8b4617dc2eac4715082eba1dc9c0e442aee39811644Set Approval For...157840662022-10-19 18:52:4739 days 16 hrs agoENS Name buttersauce.eth IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00184352 39.92984713
0xc29bd6e29dfd737f6e6cde78e9b337818c52d7aebe8c2fbf864416a862e8381cSet Approval For...157840662022-10-19 18:52:4739 days 16 hrs agoENS Name buttersauce.eth IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00184112 39.92984713
0x23a598b8734c2417425597aed5d6dffc1ffbdc71ad1046d2662680ff40234bb1Set Approval For...157555572022-10-15 19:17:5943 days 15 hrs agoENS Name mik3nikes.eth IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00069473 15.07518209
0x23ba08a45a86d0f873c3970c836ffb594f597ebf5e8c2afad79bddbc44ced216Set Approval For...157284102022-10-12 0:20:4747 days 10 hrs ago0xcbdd639a899a69458f3acc23f47d59603d116449 IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00085754 18.60783773
0xef60fab599384083e90a971dd2b9ef2d3601cb77af2ac09a89f52df22e8e751aSet Approval For...157249572022-10-11 12:46:3547 days 22 hrs ago0x672c9482449e07f94121e3088723a797a7b5635b IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00101611 22.0487759
0x0b6b8cbd7572f88985672cd45566aba740679f852c821b93d3c8d23cf741d5eeSafe Transfer Fr...157215742022-10-11 1:26:2348 days 9 hrs agoENS Name mortarmag53.eth IN  0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0 Ether0.00175993 33.27284622
[ Download CSV Export 
Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xb415621fcaaab61599c2d4798224c15a6d61c45627c1c415281a93430fee5089152328822022-07-28 19:30:39122 days 15 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0xa8cddc2dc479b460eaed6468c73c820a3f89f2d30.0922597 Ether
0xb415621fcaaab61599c2d4798224c15a6d61c45627c1c415281a93430fee5089152328822022-07-28 19:30:39122 days 15 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x9db13b06345c1bf5684f02aa2022103e11b3a7020.0922597 Ether
0xb415621fcaaab61599c2d4798224c15a6d61c45627c1c415281a93430fee5089152328822022-07-28 19:30:39122 days 15 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x1fd4529edac4fcf8a10081f49f8f5fb1c48073480.19514699 Ether
0xb415621fcaaab61599c2d4798224c15a6d61c45627c1c415281a93430fee5089152328822022-07-28 19:30:39122 days 15 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x166d28de2c43730f65908f5bc6a6b8b226465b7c0.19514699 Ether
0xb415621fcaaab61599c2d4798224c15a6d61c45627c1c415281a93430fee5089152328822022-07-28 19:30:39122 days 15 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x6319c7bb8b6799e892292c602feb711cb1ec46060.19514699 Ether
0xb415621fcaaab61599c2d4798224c15a6d61c45627c1c415281a93430fee5089152328822022-07-28 19:30:39122 days 15 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0xe6f23cd41f3dae0a4c899b78d32e4d1e16522d430.77011442 Ether
0x6e6a13c844f5768c4675dd5fb5e84bb0c7bcc9da79659d6dd25183bf416c89f0151353002022-07-13 16:25:16137 days 18 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0xa8cddc2dc479b460eaed6468c73c820a3f89f2d30.13707992 Ether
0x6e6a13c844f5768c4675dd5fb5e84bb0c7bcc9da79659d6dd25183bf416c89f0151353002022-07-13 16:25:16137 days 18 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x9db13b06345c1bf5684f02aa2022103e11b3a7020.13707992 Ether
0x6e6a13c844f5768c4675dd5fb5e84bb0c7bcc9da79659d6dd25183bf416c89f0151353002022-07-13 16:25:16137 days 18 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x1fd4529edac4fcf8a10081f49f8f5fb1c48073480.28995036 Ether
0x6e6a13c844f5768c4675dd5fb5e84bb0c7bcc9da79659d6dd25183bf416c89f0151353002022-07-13 16:25:16137 days 18 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x166d28de2c43730f65908f5bc6a6b8b226465b7c0.28995036 Ether
0x6e6a13c844f5768c4675dd5fb5e84bb0c7bcc9da79659d6dd25183bf416c89f0151353002022-07-13 16:25:16137 days 18 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x6319c7bb8b6799e892292c602feb711cb1ec46060.28995036 Ether
0x6e6a13c844f5768c4675dd5fb5e84bb0c7bcc9da79659d6dd25183bf416c89f0151353002022-07-13 16:25:16137 days 18 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0xe6f23cd41f3dae0a4c899b78d32e4d1e16522d431.1442398 Ether
0x0d7ca0804abc938a2966b1d47aea62700bb7a0fca943aaec17aaf71216506dfe150356752022-06-27 18:24:08153 days 16 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0xa8cddc2dc479b460eaed6468c73c820a3f89f2d30.2872804 Ether
0x0d7ca0804abc938a2966b1d47aea62700bb7a0fca943aaec17aaf71216506dfe150356752022-06-27 18:24:08153 days 16 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x9db13b06345c1bf5684f02aa2022103e11b3a7020.2872804 Ether
0x0d7ca0804abc938a2966b1d47aea62700bb7a0fca943aaec17aaf71216506dfe150356752022-06-27 18:24:08153 days 16 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x1fd4529edac4fcf8a10081f49f8f5fb1c48073480.60765321 Ether
0x0d7ca0804abc938a2966b1d47aea62700bb7a0fca943aaec17aaf71216506dfe150356752022-06-27 18:24:08153 days 16 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x166d28de2c43730f65908f5bc6a6b8b226465b7c0.60765321 Ether
0x0d7ca0804abc938a2966b1d47aea62700bb7a0fca943aaec17aaf71216506dfe150356752022-06-27 18:24:08153 days 16 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x6319c7bb8b6799e892292c602feb711cb1ec46060.60765321 Ether
0x0d7ca0804abc938a2966b1d47aea62700bb7a0fca943aaec17aaf71216506dfe150356752022-06-27 18:24:08153 days 16 hrs ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0xe6f23cd41f3dae0a4c899b78d32e4d1e16522d432.39800005 Ether
0x3b6d1ad65740d8fca0f24767d038c084913499d0a5560a97ef7197ca958067c3149085212022-06-05 10:10:41176 days 56 mins ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0xa8cddc2dc479b460eaed6468c73c820a3f89f2d30.00007142 Ether
0x3b6d1ad65740d8fca0f24767d038c084913499d0a5560a97ef7197ca958067c3149085212022-06-05 10:10:41176 days 56 mins ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x9db13b06345c1bf5684f02aa2022103e11b3a7020.00007142 Ether
0x3b6d1ad65740d8fca0f24767d038c084913499d0a5560a97ef7197ca958067c3149085212022-06-05 10:10:41176 days 56 mins ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x1fd4529edac4fcf8a10081f49f8f5fb1c48073480.00015107 Ether
0x3b6d1ad65740d8fca0f24767d038c084913499d0a5560a97ef7197ca958067c3149085212022-06-05 10:10:41176 days 56 mins ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x166d28de2c43730f65908f5bc6a6b8b226465b7c0.00015107 Ether
0x3b6d1ad65740d8fca0f24767d038c084913499d0a5560a97ef7197ca958067c3149085212022-06-05 10:10:41176 days 56 mins ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0x6319c7bb8b6799e892292c602feb711cb1ec46060.00015107 Ether
0x3b6d1ad65740d8fca0f24767d038c084913499d0a5560a97ef7197ca958067c3149085212022-06-05 10:10:41176 days 56 mins ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0xe6f23cd41f3dae0a4c899b78d32e4d1e16522d430.0005962 Ether
0xe0c7e6981af7a11648e167bed8b275120514880c5b1da58d86d5c7109ef9ab3f149085192022-06-05 10:10:34176 days 57 mins ago 0x7bb469bb31c809b5bffe805cffecb3d88889a3eb0xa8cddc2dc479b460eaed6468c73c820a3f89f2d30.7142476 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
JanitorsNFT

Compiler Version
v0.8.6+commit.11564f7e

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 13 : JanitorsNFT.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./ERC721A.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract JanitorsNFT is ERC721A, Ownable {

    using ECDSA for bytes32;

    uint constant public MAX_SUPPLY = 4444;

    string public baseURI = "https://storage.googleapis.com/janitorsnft/meta/";

    uint public price = 0.044 ether;
    uint public reservedSupply = 100;
    uint public maxPresaleMintsPerWallet = 3;
    uint public maxPublicMintsPerWallet = 10;

    uint public presaleStartTimestamp = 1654088400;
    uint public publicSaleStartTimestamp = 1654110000;

    mapping(address => uint) public mintedNFTs;
    mapping(address => uint) public presaledNFTs;

    address public authorizedSigner = 0x968f9ABBFf02589c9efda1DcFFE1Afb5d386E4c2;

    bool osAutoApproveEnabled = true;
    address public osProxyRegistryAddress = 0xa5409ec958C83C3f309868babACA7c86DCB077c1;

    constructor() ERC721A("JanitorsNFT", "JANITORS", 10) {
    }

    function setBaseURI(string memory _baseURIArg) external onlyOwner {
        baseURI = _baseURIArg;
    }

    function configure(
        uint _reservedSupply,
        uint _maxPresaleMintsPerWallet,
        uint _maxPublicMintsPerWallet,
        uint _presaleStartTimestamp,
        uint _publicSaleStartTimestamp,
        bool _osAutoApproveEnabled,
        address _authorizedSigner
    ) external onlyOwner {
        reservedSupply = _reservedSupply;
        maxPresaleMintsPerWallet = _maxPresaleMintsPerWallet;
        maxPublicMintsPerWallet = _maxPublicMintsPerWallet;
        presaleStartTimestamp = _presaleStartTimestamp;
        publicSaleStartTimestamp = _publicSaleStartTimestamp;
        osAutoApproveEnabled = _osAutoApproveEnabled;
        authorizedSigner = _authorizedSigner;
    }

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

    function recoverSignerAddress(address minter, bytes calldata signature) internal pure returns (address) {
        bytes32 hash = hashTransaction(minter);
        return hash.recover(signature);
    }

    function hashTransaction(address minter) internal pure returns (bytes32) {
        bytes32 argsHash = keccak256(abi.encodePacked(minter));
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", argsHash));
    }

    function presale(uint amount, bytes calldata signature) public payable {
        require(block.timestamp >= presaleStartTimestamp && block.timestamp < publicSaleStartTimestamp, "Presale minting is not available");
        require(signature.length > 0 && recoverSignerAddress(_msgSender(), signature) == authorizedSigner, "tx sender is not allowed to presale");
        require(presaledNFTs[_msgSender()] + amount <= maxPresaleMintsPerWallet, "Too much mints for this wallet!");
        require(price * amount == msg.value, "Wrong ethers value");

        presaledNFTs[_msgSender()] += amount;
        mint(amount);
    }

    function publicMint(uint amount) public payable {
        require(block.timestamp >= publicSaleStartTimestamp, "Minting is not available");
        require(mintedNFTs[_msgSender()] + amount <= maxPublicMintsPerWallet, "Too much mints for this wallet!");
        require(price * amount == msg.value, "Wrong ethers value");

        mintedNFTs[_msgSender()] += amount;
        mint(amount);
    }

    function mint(uint amount) internal {
        require(tx.origin == _msgSender(), "The caller is another contract");
        require(amount > 0, "Zero amount to mint");
        require(totalSupply() + reservedSupply + amount <= MAX_SUPPLY, "Tokens supply reached limit");

        _safeMint(_msgSender(), amount);
    }
    //endregion

    function airdrop(address[] calldata addresses, uint[] calldata amounts) external onlyOwner {
        for (uint i = 0; i < addresses.length; i++) {
            require(totalSupply() + amounts[i] <= MAX_SUPPLY, "Tokens supply reached limit");
            _safeMint(addresses[i], amounts[i]);
        }
    }

    function isApprovedForAll(address _owner, address operator) public view override returns (bool) {
        if (osAutoApproveEnabled) {
            OpenSeaProxyRegistry proxyRegistry = OpenSeaProxyRegistry(osProxyRegistryAddress);
            if (address(proxyRegistry.proxies(_owner)) == operator) {
                return true;
            }
        }
        return super.isApprovedForAll(_owner, operator);
    }

    receive() external payable {

    }

    function withdraw() external {
        uint balance = address(this).balance;
        payable(0xe6f23Cd41F3dae0a4c899b78d32e4d1E16522d43).transfer(balance / 2);
        payable(0x6319C7Bb8B6799E892292C602Feb711CB1ec4606).transfer(balance * 1267 / 10000);
        payable(0x166D28De2C43730F65908F5Bc6a6b8B226465B7C).transfer(balance * 1267 / 10000);
        payable(0x1FD4529eDac4fcF8A10081f49F8f5FB1C4807348).transfer(balance * 1267 / 10000);
        payable(0x9db13B06345c1bf5684f02aA2022103e11B3a702).transfer(balance * 599 / 10000);
        payable(0xa8CDDC2DC479b460EAeD6468c73C820A3F89F2D3).transfer(balance * 599 / 10000);
    }

}


contract OwnableDelegateProxy {}

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

File 2 of 13 : ERC721A.sol
// SPDX-License-Identifier: MIT
// Creators: locationtba.eth, 2pmflow.eth

pragma solidity ^0.8.0;

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/token/ERC721/extensions/IERC721Enumerable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints.
 *
 * Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..).
 *
 * Does not support burning tokens to address(0).
 */
contract ERC721A is
Context,
ERC165,
IERC721,
IERC721Metadata,
IERC721Enumerable
{
    using Address for address;
    using Strings for uint256;

    struct TokenOwnership {
        address addr;
        uint64 startTimestamp;
    }

    struct AddressData {
        uint128 balance;
        uint128 numberMinted;
    }

    uint256 private currentIndex = 0;

    uint256 internal immutable maxBatchSize;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to ownership details
    // An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.
    mapping(uint256 => TokenOwnership) private _ownerships;

    // Mapping owner address to address data
    mapping(address => AddressData) private _addressData;

    // 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
   * `maxBatchSize` refers to how much a minter can mint at a time.
   */
    constructor(
        string memory name_,
        string memory symbol_,
        uint256 maxBatchSize_
    ) {
        require(maxBatchSize_ > 0, "ERC721A: max batch size must be nonzero");
        _name = name_;
        _symbol = symbol_;
        maxBatchSize = maxBatchSize_;
    }

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

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
   */
    function tokenByIndex(uint256 index) public view override returns (uint256) {
        require(index < totalSupply(), "ERC721A: global index out of bounds");
        return index;
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
   * This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.
   * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
   */
    function tokenOfOwnerByIndex(address owner, uint256 index)
    public
    view
    override
    returns (uint256)
    {
        require(index < balanceOf(owner), "ERC721A: owner index out of bounds");
        uint256 numMintedSoFar = totalSupply();
        uint256 tokenIdsIdx = 0;
        address currOwnershipAddr = address(0);
        for (uint256 i = 0; i < numMintedSoFar; i++) {
            TokenOwnership memory ownership = _ownerships[i];
            if (ownership.addr != address(0)) {
                currOwnershipAddr = ownership.addr;
            }
            if (currOwnershipAddr == owner) {
                if (tokenIdsIdx == index) {
                    return i;
                }
                tokenIdsIdx++;
            }
        }
        revert("ERC721A: unable to get token of owner by index");
    }

    /**
     * @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 ||
        interfaceId == type(IERC721Enumerable).interfaceId ||
        super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
   */
    function balanceOf(address owner) public view override returns (uint256) {
        require(owner != address(0), "ERC721A: balance query for the zero address");
        return uint256(_addressData[owner].balance);
    }

    function _numberMinted(address owner) internal view returns (uint256) {
        require(
            owner != address(0),
            "ERC721A: number minted query for the zero address"
        );
        return uint256(_addressData[owner].numberMinted);
    }

    function ownershipOf(uint256 tokenId)
    internal
    view
    returns (TokenOwnership memory)
    {
        require(_exists(tokenId), "ERC721A: owner query for nonexistent token");

        uint256 lowestTokenToCheck;
        if (tokenId >= maxBatchSize) {
            lowestTokenToCheck = tokenId - maxBatchSize + 1;
        }

        for (uint256 curr = tokenId; curr >= lowestTokenToCheck; curr--) {
            TokenOwnership memory ownership = _ownerships[curr];
            if (ownership.addr != address(0)) {
                return ownership;
            }
        }

        revert("ERC721A: unable to determine the owner of token");
    }

    /**
     * @dev See {IERC721-ownerOf}.
   */
    function ownerOf(uint256 tokenId) public view override returns (address) {
        return ownershipOf(tokenId).addr;
    }

    /**
     * @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 override {
        address owner = ERC721A.ownerOf(tokenId);
        require(to != owner, "ERC721A: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721A: approve caller is not owner nor approved for all"
        );

        _approve(to, tokenId, owner);
    }

    /**
     * @dev See {IERC721-getApproved}.
   */
    function getApproved(uint256 tokenId) public view override returns (address) {
        require(_exists(tokenId), "ERC721A: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
   */
    function setApprovalForAll(address operator, bool approved) public override {
        require(operator != _msgSender(), "ERC721A: 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 override {
        _transfer(from, to, tokenId);
    }

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

    /**
     * @dev See {IERC721-safeTransferFrom}.
   */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public override {
        _transfer(from, to, tokenId);
        require(
            _checkOnERC721Received(from, to, tokenId, _data),
            "ERC721A: 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`),
   */
    function _exists(uint256 tokenId) internal view returns (bool) {
        return tokenId < currentIndex;
    }

    function _safeMint(address to, uint256 quantity) internal {
        _safeMint(to, quantity, "");
    }

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
   *
   * Requirements:
   *
   * - `to` cannot be the zero address.
   * - `quantity` cannot be larger than the max batch size.
   *
   * Emits a {Transfer} event.
   */
    function _safeMint(
        address to,
        uint256 quantity,
        bytes memory _data
    ) internal {
        uint256 startTokenId = currentIndex;
        require(to != address(0), "ERC721A: mint to the zero address");
        // We know if the first token in the batch doesn't exist, the other ones don't as well, because of serial ordering.
        require(!_exists(startTokenId), "ERC721A: token already minted");
        require(quantity <= maxBatchSize, "ERC721A: quantity to mint too high");

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        AddressData memory addressData = _addressData[to];
        _addressData[to] = AddressData(
            addressData.balance + uint128(quantity),
            addressData.numberMinted + uint128(quantity)
        );
        _ownerships[startTokenId] = TokenOwnership(to, uint64(block.timestamp));

        uint256 updatedIndex = startTokenId;

        for (uint256 i = 0; i < quantity; i++) {
            emit Transfer(address(0), to, updatedIndex);
            require(
                _checkOnERC721Received(address(0), to, updatedIndex, _data),
                "ERC721A: transfer to non ERC721Receiver implementer"
            );
            updatedIndex++;
        }

        currentIndex = updatedIndex;
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
   *
   * 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
    ) private {
        TokenOwnership memory prevOwnership = ownershipOf(tokenId);

        bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
        getApproved(tokenId) == _msgSender() ||
        isApprovedForAll(prevOwnership.addr, _msgSender()));

        require(
            isApprovedOrOwner,
            "ERC721A: transfer caller is not owner nor approved"
        );

        require(
            prevOwnership.addr == from,
            "ERC721A: transfer from incorrect owner"
        );
        require(to != address(0), "ERC721A: transfer to the zero address");

        _beforeTokenTransfers(from, to, tokenId, 1);

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

        _addressData[from].balance -= 1;
        _addressData[to].balance += 1;
        _ownerships[tokenId] = TokenOwnership(to, uint64(block.timestamp));

        // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
        // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
        uint256 nextTokenId = tokenId + 1;
        if (_ownerships[nextTokenId].addr == address(0)) {
            if (_exists(nextTokenId)) {
                _ownerships[nextTokenId] = TokenOwnership(
                    prevOwnership.addr,
                    prevOwnership.startTimestamp
                );
            }
        }

        emit Transfer(from, to, tokenId);
        _afterTokenTransfers(from, to, tokenId, 1);
    }

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

    uint256 public nextOwnerToExplicitlySet = 0;

    /**
     * @dev Explicitly set `owners` to eliminate loops in future calls of ownerOf().
   */
    function _setOwnersExplicit(uint256 quantity) internal {
        uint256 oldNextOwnerToSet = nextOwnerToExplicitlySet;
        require(quantity > 0, "quantity must be nonzero");
        uint256 endIndex = oldNextOwnerToSet + quantity - 1;
        if (endIndex > currentIndex - 1) {
            endIndex = currentIndex - 1;
        }
        // We know if the last one in the group exists, all in the group exist, due to serial ordering.
        require(_exists(endIndex), "not enough minted yet for this cleanup");
        for (uint256 i = oldNextOwnerToSet; i <= endIndex; i++) {
            if (_ownerships[i].addr == address(0)) {
                TokenOwnership memory ownership = ownershipOf(i);
                _ownerships[i] = TokenOwnership(
                    ownership.addr,
                    ownership.startTimestamp
                );
            }
        }
        nextOwnerToExplicitlySet = endIndex + 1;
    }

    /**
     * @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(to).onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721A: transfer to non ERC721Receiver implementer");
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
   *
   * startTokenId - the first token id to be transferred
   * quantity - the amount to be transferred
   *
   * 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`.
   */
    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

    /**
     * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
   * minting.
   *
   * startTokenId - the first token id to be transferred
   * quantity - the amount to be transferred
   *
   * Calling conditions:
   *
   * - when `from` and `to` are both non-zero.
   * - `from` and `to` are never both zero.
   */
    function _afterTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}
}

File 3 of 13 : IERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

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

File 4 of 13 : 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 5 of 13 : 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 6 of 13 : 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 7 of 13 : 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 8 of 13 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

File 9 of 13 : 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 10 of 13 : 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 11 of 13 : 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 12 of 13 : 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 13 of 13 : 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);
    }
}

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

Contract Security Audit

Contract ABI

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"MAX_SUPPLY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"addresses","type":"address[]"},{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"name":"airdrop","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":[],"name":"authorizedSigner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_reservedSupply","type":"uint256"},{"internalType":"uint256","name":"_maxPresaleMintsPerWallet","type":"uint256"},{"internalType":"uint256","name":"_maxPublicMintsPerWallet","type":"uint256"},{"internalType":"uint256","name":"_presaleStartTimestamp","type":"uint256"},{"internalType":"uint256","name":"_publicSaleStartTimestamp","type":"uint256"},{"internalType":"bool","name":"_osAutoApproveEnabled","type":"bool"},{"internalType":"address","name":"_authorizedSigner","type":"address"}],"name":"configure","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxPresaleMintsPerWallet","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxPublicMintsPerWallet","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"mintedNFTs","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nextOwnerToExplicitlySet","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"osProxyRegistryAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"presale","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"presaleStartTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"presaledNFTs","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"price","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"publicMint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"publicSaleStartTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"reservedSupply","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":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_baseURIArg","type":"string"}],"name":"setBaseURI","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"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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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.