Contract 0xA66F3bd98b4741bad68BCd7511163c6F855d2129 2

Token Contract 
 
 
Txn Hash
Method
Block
From
To
Value
0xb42c48da5b302f508e766c17e3024437b792d732569ca34473a7286b390191b1Safe Transfer Fr...160554042022-11-26 16:38:472 days 2 hrs agoENS Name kxtz.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.0010503611.44
0xdb8ae8b32a32e43b0ae980908c8f0382e8cfcdbc294db4046b4529052958f31fSet Approval For...160490342022-11-25 19:18:233 days 19 mins agoENS Name nftalisman.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00049367 10.58353221
0x274e7162979f162d128afdd6a6fa8b06b8985d8c60e155fbb626f17d75b3b1d8Set Approval For...160364172022-11-24 1:00:354 days 18 hrs agoENS Name versuhtyle.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00060294 12.92589511
0x39b92dddcc8a10fbbd5596e07b6032f0b8b11e2fcad4a8f96b93e4a034f167c7Set Approval For...160343122022-11-23 17:53:235 days 1 hr agoENS Name jaimederringer.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00073047 15.66004132
0xcb8c04a20b63d56bc74b1738cb5db8d9b0ac1d0c5b3f3c694761a41e50b97c3fSafe Transfer Fr...160159482022-11-21 4:17:357 days 15 hrs ago0x4b629a2d73907a54f324f737e4d0f3c613b979ca IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00101092 11.50003722
0xc84e773bc1afe32f8edd1f75cb68d691fa3f74def25d15b4421d36f4dc2cc365Set Approval For...160114362022-11-20 13:10:478 days 6 hrs agoENS Name versuhtyle.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00029413 11.89188343
0x81fff4ee18b482a72450f60f33213543d20bb80656a33eae14ed77f2be699c57Set Approval For...160114352022-11-20 13:10:358 days 6 hrs agoENS Name versuhtyle.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00029555 11.9089443
0xd9cc2296caeaf6f6eb83fe2a5fa3bb16d11158ebddc36d291c0dc1262d39c287Set Approval For...160106922022-11-20 10:40:478 days 8 hrs agoENS Name bittymcbitface.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00052882 11.33705957
0xb80589e23189499082423ec0697a7d83915f01bd17b4a6e618ecfe4f617ef95cSet Approval For...160084012022-11-20 2:59:478 days 16 hrs agoENS Name b008135.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.0004747710.17833293
0x2385e73a5b92d40c8ce5b3f3bd2e39410bfd9673a55bdb4bfd097220a162daa8Safe Transfer Fr...159999572022-11-18 22:43:119 days 20 hrs ago0xa2b6f4b9a12af774d51fb1d67e859cc5e7cf89a0 IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00120638 13.29991428
0x193eb4665bf2bd8774a715c3b1d336a7c5516f26c179934f3846714fdb5d5c34Set Approval For...159983552022-11-18 17:21:1110 days 2 hrs agoENS Name mufasa007.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00044598 17.97036183
0x1b682586ad1e7f49b46c4a2a913791480e3e7aec1bacaa4c7f56a3ab3eea5e76Set Approval For...159982862022-11-18 17:06:5910 days 2 hrs ago0x365f4f2ffaea8505a71da5a3d18eac4795468c98 IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00052917 21.32236008
0x9e9bcbc6c14eac870d38a248f5b98eec8ea49395c5dfc0b8dd062d8c017ba931Set Approval For...159700982022-11-14 18:34:2314 days 1 hr agoENS Name beigeclimate.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00104176 22.29321236
0xcafe788fe645a9b817683b8af9a839669a07240c299504252d333894e11cbbbfSafe Transfer Fr...159669782022-11-14 8:07:3514 days 11 hrs ago0xa2b6f4b9a12af774d51fb1d67e859cc5e7cf89a0 IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00176587 17.45611073
0x39597dfced4c9c3b468af26fe4de207daf81aa4509a9b791d48d38e53a37a6c3Set Approval For...159653882022-11-14 2:48:2314 days 16 hrs ago0xe836d7fd5f90dfbbbd259d3754d1987b93ad7079 IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.0007288 15.62417907
0xc991fc55ef914321b07ee1923a49161d59a6bb7e2e352025dab528ef20dff491Set Approval For...159651172022-11-14 1:53:4714 days 17 hrs ago0xb253434ae17a68fecd089edc8f0ac9f23c5e4fbd IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00078418 16.8113232
0x06a198a7b5e48213696de08b1c7e064ff3ff2947d213d1e6decf46707254fde2Set Approval For...159293752022-11-09 2:04:4719 days 17 hrs ago0x161b6facfa657d93469add65de9dcb855816ad40 IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.0023323 50
0xdc8ad0f5b3e3efd19960ae553f50ec27e53ec234f12ce82fd11d2caad4691028Set Approval For...159281392022-11-08 21:56:3519 days 21 hrs ago0xd75eee9e0b62be2c0a0f673d655e0623a798397b IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00228332 48.94997438
0xd934bd6ef74f37b6761e6c29c52ba61eacad05e98c4893396fa211b04af88d9eSet Approval For...159219992022-11-08 1:22:5920 days 18 hrs agoENS Name aubjectivity.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.0007077 15.17173679
0x9c5e184c5311b6e0faf34eb49dc2c1a0faf799e155d1428bd627a71c46de000fSet Approval For...158997132022-11-04 22:43:1123 days 20 hrs agoRoboPunks2048: Deployer IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00035242 14.20023143
0x068fcfe93efa5427be5bf3cb8d31565a0e97e1f2c797b7f3e235d80d712a1850Safe Transfer Fr...158982472022-11-04 17:48:3524 days 1 hr agoENS Name thikst.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00240468 26.51428475
0x1e2c1c4709b647c80e806ff59c73b91b294063ab79c01a2c6b584705f3033510Set Approval For...158831252022-11-02 15:06:5926 days 4 hrs agoENS Name tricil.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00029795 12.00568095
0x4aa9ceb7e5cf4a3a053edc58084529ce7f681c5a3813286098d3e8df9f0e1f5bSet Approval For...158439282022-10-28 3:39:2331 days 15 hrs agoENS Name 213.eth IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.0002766611.14775892
0x51b8fa9b5f06b108b5c95a3956c8a35612ef93a8a91bcc5abdeb0f854f3c8759Set Approval For...158283122022-10-25 23:17:4733 days 20 hrs ago0x0eee3a65abd51492ae9ac5c43046cfb9799cc66a IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00086845 18.61795843
0x3a921c461651c92868e81a8a9a788083d38c76efd5cf0873f39878a749e64deaSet Approval For...158274392022-10-25 20:21:3533 days 23 hrs ago0x0a2542a170aa02b96b588aa3af8b09ab22a9d7ac IN  0xa66f3bd98b4741bad68bcd7511163c6f855d21290 Ether0.00155267 33.28633673
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Latest 14 internal transactions
Parent Txn Hash Block From To Value
0xc0be7092080b7f9cfa7531002b9fa81fb29f96bea3ccf0dc00d6fca9672215cd132643362021-09-20 18:48:56434 days 48 mins ago 0xa66f3bd98b4741bad68bcd7511163c6f855d21290xaf6c9fa6a10dccbcc636f15e365c8a0ad7fcab992.102 Ether
0xc0be7092080b7f9cfa7531002b9fa81fb29f96bea3ccf0dc00d6fca9672215cd132643362021-09-20 18:48:56434 days 48 mins ago 0xa66f3bd98b4741bad68bcd7511163c6f855d2129ENS Name damnyuri.eth2.102 Ether
0xc0be7092080b7f9cfa7531002b9fa81fb29f96bea3ccf0dc00d6fca9672215cd132643362021-09-20 18:48:56434 days 48 mins ago 0xa66f3bd98b4741bad68bcd7511163c6f855d2129ENS Name gowens.eth2.102 Ether
0xc0be7092080b7f9cfa7531002b9fa81fb29f96bea3ccf0dc00d6fca9672215cd132643362021-09-20 18:48:56434 days 48 mins ago 0xa66f3bd98b4741bad68bcd7511163c6f855d21290x7f73422854dd9727858be39e86c1ad8b6bca89d484.08 Ether
0xc0be7092080b7f9cfa7531002b9fa81fb29f96bea3ccf0dc00d6fca9672215cd132643362021-09-20 18:48:56434 days 48 mins ago 0xa66f3bd98b4741bad68bcd7511163c6f855d2129ENS Name treasures.eth105.1 Ether
0xc0be7092080b7f9cfa7531002b9fa81fb29f96bea3ccf0dc00d6fca9672215cd132643362021-09-20 18:48:56434 days 48 mins ago 0xa66f3bd98b4741bad68bcd7511163c6f855d21290xfb728a85e05b74ea63243e8108080aa9bbc595e8224.914 Ether
0xdecd23989b10bdc15c634fc25438bc47617a6fb0b3411cf696998a82aed1b570132641152021-09-20 17:58:43434 days 1 hr ago 0xa66f3bd98b4741bad68bcd7511163c6f855d21290xaf6c9fa6a10dccbcc636f15e365c8a0ad7fcab990.005 Ether
0xdecd23989b10bdc15c634fc25438bc47617a6fb0b3411cf696998a82aed1b570132641152021-09-20 17:58:43434 days 1 hr ago 0xa66f3bd98b4741bad68bcd7511163c6f855d2129ENS Name damnyuri.eth0.005 Ether
0xdecd23989b10bdc15c634fc25438bc47617a6fb0b3411cf696998a82aed1b570132641152021-09-20 17:58:43434 days 1 hr ago 0xa66f3bd98b4741bad68bcd7511163c6f855d2129ENS Name gowens.eth0.005 Ether
0xdecd23989b10bdc15c634fc25438bc47617a6fb0b3411cf696998a82aed1b570132641152021-09-20 17:58:43434 days 1 hr ago 0xa66f3bd98b4741bad68bcd7511163c6f855d21290x7f73422854dd9727858be39e86c1ad8b6bca89d40.2 Ether
0xdecd23989b10bdc15c634fc25438bc47617a6fb0b3411cf696998a82aed1b570132641152021-09-20 17:58:43434 days 1 hr ago 0xa66f3bd98b4741bad68bcd7511163c6f855d2129ENS Name treasures.eth0.25 Ether
0xdecd23989b10bdc15c634fc25438bc47617a6fb0b3411cf696998a82aed1b570132641152021-09-20 17:58:43434 days 1 hr ago 0xa66f3bd98b4741bad68bcd7511163c6f855d21290xfb728a85e05b74ea63243e8108080aa9bbc595e80.535 Ether
0x68cd97163dd8e8de8971d2c5294d21558a961a33cca76c35303f42bad0668a24132640972021-09-20 17:54:40434 days 1 hr ago 0xa66f3bd98b4741bad68bcd7511163c6f855d21290xfb728a85e05b74ea63243e8108080aa9bbc595e81 Ether
0x90340eff0172d7a45f549a7d1a597d24ff4accfbb15678b6e7e36730d5273825132640922021-09-20 17:53:40434 days 1 hr ago 0xa66f3bd98b4741bad68bcd7511163c6f855d2129ENS Name treasures.eth2 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
ImpermanentDigital

Compiler Version
v0.8.7+commit.e28d00a7

Optimization Enabled:
No with 200 runs

Other Settings:
byzantium EvmVersion
File 1 of 15 : ImpermanentDigital.sol
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

/*
                                                                                                                                                                                                   @*   
                                 @@@@@                                                                                                                                                         /@@@@@@@@
               @@               @@@@@@@                                                                    [email protected]@@@@@@@@@@                                                 @@@@@@@@@@             @@@@@@@@@
     @@@@@@@@@ @@@@             @@@@@@@   @@@@@                      @@@@@@@@@@@@@@@@@@&    @@@    @@@@  @@@@@@*     @@@,        @@@@      @@@@@                       @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
    @@@@@@@@@@@ [email protected]@@@           @@@@@ ,@@@@@@@@@@@@@@@                @@@@@@@@@,@@   @@@@  @@@@   @@@@@              @@@@       @@@@@    @@@@@@@                        @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 
    @@@@@@@@@@@    @@@@       @@@@@  (@@@@@(     @@@@@@                 @@@@@@@@      @@@% @@@@@ @@@ @@    @@@@@@@@@@@@@@       @@@@@@   @@@@@@                          @@@@@@@     @@@@@@@      @#    
     @@@@@@@        @@@@@@@@@@@@@@@   @@@@@@    %@@@@@@                  @@@@@@@@@@   @@@& @@@@@@@@  @@   [email protected]@@@  @@@@@ @        @@@@@@  @@@@@                                        @@@@@              
       @@@@         @@@    @@@ @@@@    @@@@@@@@@@@@        @@@@@*        @@@@@ /@@@@ @@@@( @@ @@@@    @    @@@@ ,@@@@ ,@        @@ @@@@@@@  @@@@@@@@@@@@@@@      @@@@     &@@@@@@@   #@@@.              
        @@@,        @@@     @@ @@@(    @@@@      @@@@@@@@@@@@@@@@@@.    @@@@@@@  @@@@@@@   @. @@@@     @     @@@@@@   @@@@@@@@  @@ @@@@@@   @@@@@@    @@@@       @@@@@@@@@@@@@@@@@@  &@@@               
        @@@@      @@@@@@       @@@@    @@@@    @@@@@@@@@@@@@@@@@@@@  @@@@@@  @@@@         @@           @@@@*           @@@@@@   @@ [email protected]@@@@,  @@@@@                @@@@@@@@@@@    @@@&  @@@@              
       @@@@@   @@@@@@@@@         @@@@  @@@@      @@@@@@               @@@@@  @@@@      /@@@@            @@@@@@@                ,@@  @@@@@    @@@@@@@              @@@@@@@   @@@@@@@   @@@@@             
      #@@@@    @@@@@@@@           @@@@  @@@       @@@@@    .#@@@@@@@@@       @@@@     @@@@@              %@@@@@                @@@          @@@@@@@@@@@@@@@        @@@@@@   @@@@@@   @@@@@@@@@@         
  @@@@@@@@@@                           @@@@@@     @@@@@@@@@@@@@@@@@@@@      @@@@@@@@%                                        @@@@,          &@@@                  @@@@@      @@@&   @@@@@@@@@@@@@       
 @@@@@@@@@@@@                       @@@@@@@@@@     @@@@@(  &@               @@@@@@@@@@@                                   @@@@@@@          @@@@@                 @@@@@      @@@@    #@@@@@@@@@@@@       
 @@@@@@@@@@@@                      @@@@@@@@@@@@    @@@@@ ,@@@@                @@@@@@@@@                                   @@@@@          @@@@@@@@@@@@@@@@@@@@@   @@@@@@     @@@@@@     @@@@@@@          
    @@@@@@                          %@@@@@@@@@    @@@@@@@@@@@@@@@@@@@@@                                                                   (@@@@@     [email protected]@@@@@@@   @@@@@@     @@@@@@                      
                                       [email protected]@@@       @@@@@@                                                                                                         @@@@@      @@@@@                      

*/

contract ImpermanentDigital is ERC721, ERC721Enumerable, ERC721Burnable, Ownable {
    using Counters for Counters.Counter;

    Counters.Counter private _tokenIdCounter;

    uint256 public maxTokenSupply;

    uint256 public constant MAX_MINTS_PER_TXN = 8;

    uint256 public mintPrice = 0.1 ether;

    uint256 public maxPresaleMintsPerWallet = 4;

    bool public preSaleIsActive = false;

    bool public saleIsActive = false;

    bool public evolutionIsActive = false;

    string public baseURI;

    string public provenance;

    uint256 public startingIndexBlock;

    uint256 public startingIndex;

    address public afterlifeContractAddress;

    address public auraContractAddress;

    mapping (address => uint256) private _presaleMints;

    address[6] private _shareholders;

    uint[6] private _shares;

    event PaymentReleased(address to, uint256 amount);

    event IterationEvolved(uint256 tokenId, uint256 startingIterationNumber, uint256 endingIterationNumber);

    constructor(string memory name, string memory symbol, uint256 maxImpermanentSupply) ERC721(name, symbol) {
        maxTokenSupply = maxImpermanentSupply;

        _shareholders[0] = 0xFb728a85e05b74EA63243E8108080aA9bbc595E8; // Glassface
        _shareholders[1] = 0xDc8Eb8d2D1babD956136b57B0B9F49b433c019e3; // Treasure-Seeker
        _shareholders[2] = 0x7f73422854dD9727858bE39E86C1AD8B6bCA89d4; // Wolfbear
        _shareholders[3] = 0x93a0AA2CEd962A4BBBC8FA37b0b8d8885c595417; // Gowens
        _shareholders[4] = 0x1d14d9e297DfbcE003f5A8EbcF8cBa7fAEe70B91; // Yuri
        _shareholders[5] = 0xaf6c9fA6a10DCcBCC636F15E365c8A0aD7fcaB99; // Dedz

        _shares[0] = 5350;
        _shares[1] = 2500;
        _shares[2] = 2000;
        _shares[3] = 50;
        _shares[4] = 50;
        _shares[5] = 50;
    }

    function setMaxTokenSupply(uint256 maxImpermanentSupply) public onlyOwner {
        maxTokenSupply = maxImpermanentSupply;
    }

    function setMintPrice(uint256 newPrice) public onlyOwner {
        mintPrice = newPrice;
    }

    function setMaxPresaleMintsPerWallet(uint256 newLimit) public onlyOwner {
        maxPresaleMintsPerWallet = newLimit;
    }

    function setAfterlifeContractAddress(address newAfterlifeContractAddress) public onlyOwner {
        afterlifeContractAddress = newAfterlifeContractAddress;
    }

    function setAuraContractAddress(address newAuraContractAddress) public onlyOwner {
        auraContractAddress = newAuraContractAddress;
    }

    function withdrawForGiveaway(uint256 amount, address payable to) public onlyOwner {
        Address.sendValue(to, amount);
        emit PaymentReleased(to, amount);
    }

    function withdraw(uint256 amount) public onlyOwner {
        require(address(this).balance >= amount, "Insufficient balance");
        
        uint256 totalShares = 10000;
        for (uint256 i = 0; i < 6; i++) {
            uint256 payment = amount * _shares[i] / totalShares;

            Address.sendValue(payable(_shareholders[i]), payment);
            emit PaymentReleased(_shareholders[i], payment);
        }
    }

    /*
    * Mint reserved NFTs for giveaways, devs, etc.
    */
    function reserveMint(uint256 reservedAmount, address mintAddress) public onlyOwner {        
        uint256 supply = _tokenIdCounter.current();
        for (uint256 i = 1; i <= reservedAmount; i++) {
            _safeMint(mintAddress, supply + i);
            _tokenIdCounter.increment();
        }
    }

    /*
    * Pause sale if active, make active if paused.
    */
    function flipSaleState() public onlyOwner {
        saleIsActive = !saleIsActive;
    }

    /*
    * Pause pre-sale if active, make active if paused.
    */
    function flipPreSaleState() public onlyOwner {
        preSaleIsActive = !preSaleIsActive;
    }

    /*
    * Pause evolution if active, make active if paused.
    */
    function flipEvolutionState() public onlyOwner {
        evolutionIsActive = !evolutionIsActive;
    }

    /*
    * Mint Impermanent Digital NFTs, woot!
    */
    function mintImpermanentDigitals(uint256 numberOfTokens) public payable {
        require(saleIsActive, "Sale is not live yet");
        require(numberOfTokens <= MAX_MINTS_PER_TXN, "You can mint a max of 8 NFTs at a time");
        require(totalSupply() + numberOfTokens <= maxTokenSupply, "Purchase would exceed max available NFTs");
        require(mintPrice * numberOfTokens <= msg.value, "Ether value sent is not correct");

        for(uint256 i = 0; i < numberOfTokens; i++) {
            uint256 mintIndex = _tokenIdCounter.current() + 1;
            if (mintIndex <= maxTokenSupply) {
                _tokenIdCounter.increment();
                _safeMint(msg.sender, mintIndex);
            }
        }
    }

    /*
    * Mint Impermanent Digital NFTs during pre-sale
    */
    function presaleMint(uint256 numberOfTokens) public payable {
        require(preSaleIsActive, "Pre-sale is not live yet");
        require(_presaleMints[msg.sender] + numberOfTokens <= maxPresaleMintsPerWallet, "Max mints per wallet limit exceeded");
        require(totalSupply() + numberOfTokens <= maxTokenSupply, "Purchase would exceed max available NFTs");
        require(mintPrice * numberOfTokens <= msg.value, "Ether value sent is not correct");

        _presaleMints[msg.sender] += numberOfTokens;

        for(uint256 i = 0; i < numberOfTokens; i++) {
            uint256 mintIndex = _tokenIdCounter.current() + 1;
            if (mintIndex <= maxTokenSupply) {
                _tokenIdCounter.increment();
                _safeMint(msg.sender, mintIndex);
            }
        }

        // If we haven't set the starting index, set the starting index block.
        if (startingIndexBlock == 0) {
            startingIndexBlock = block.number;
        }
    }

    function burnForAfterlife(uint256 tokenId) external {
        require(evolutionIsActive, "Burning is not live yet");
        require(_isApprovedOrOwner(tx.origin, tokenId) && (msg.sender == afterlifeContractAddress || msg.sender == auraContractAddress), "Caller is not owner nor approved");
        _burn(tokenId);
    }

    function evolve(uint256 tokenId, uint256 startingIterationNumber, uint256 endingIterationNumber) external {
        require(evolutionIsActive, "Evolution is not live yet");
        require(_isApprovedOrOwner(_msgSender(), tokenId), "Caller is not owner nor approved");

        emit IterationEvolved(tokenId, startingIterationNumber, endingIterationNumber);
    }

    function walletOfOwner(address _owner) external view returns (uint256[] memory) {
        uint256 tokenCount = balanceOf(_owner);

        uint256[] memory tokenIds = new uint256[](tokenCount);
        for (uint256 i = 0; i < tokenCount; i++) {
            tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
        }

        return tokenIds;
    }

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

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

    /**
     * Set the starting index for the collection.
     */
    function setStartingIndex() public onlyOwner {
        require(startingIndex == 0, "Starting index is already set");
        require(startingIndexBlock != 0, "Starting index block must be set");
        
        startingIndex = uint(blockhash(startingIndexBlock)) % maxTokenSupply;
        // Just a sanity case in the worst case if this function is called late (EVM only stores last 256 block hashes).
        if (block.number - startingIndexBlock > 255) {
            startingIndex = uint(blockhash(block.number - 1)) % maxTokenSupply;
        }
        // Prevent default sequence.
        if (startingIndex == 0) {
            startingIndex = 1;
        }
    }

    /**
     * Set the starting index block for the collection. Usually, this will be set after the first sale mint.
     */
    function emergencySetStartingIndexBlock() public onlyOwner {
        require(startingIndex == 0, "Starting index is already set");
        
        startingIndexBlock = block.number;
    }

    /*     
    * Set provenance once it's calculated.
    */
    function setProvenanceHash(string memory provenanceHash) public onlyOwner {
        provenance = provenanceHash;
    }

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

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

File 2 of 15 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), 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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

File 3 of 15 : ERC721.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Base URI for computing {tokenURI}. Empty by default, can be overriden
     * in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

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

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

        _approve(to, tokenId);
    }

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

        return _tokenApprovals[tokenId];
    }

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

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

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

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

        _transfer(from, to, tokenId);
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        _beforeTokenTransfer(from, to, tokenId);

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

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

        emit Transfer(from, to, tokenId);
    }

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

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
        private returns (bool)
    {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                return retval == IERC721Receiver(to).onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    // solhint-disable-next-line no-inline-assembly
                    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` cannot be the zero address.
     * - `to` cannot be the zero address.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
}

File 4 of 15 : IERC721.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

File 5 of 15 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

File 6 of 15 : ERC721Burnable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../ERC721.sol";
import "../../../utils/Context.sol";

/**
 * @title ERC721 Burnable Token
 * @dev ERC721 Token that can be irreversibly burned (destroyed).
 */
abstract contract ERC721Burnable is Context, ERC721 {
    /**
     * @dev Burns `tokenId`. See {ERC721-_burn}.
     *
     * Requirements:
     *
     * - The caller must own `tokenId` or be an approved operator.
     */
    function burn(uint256 tokenId) public virtual {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved");
        _burn(tokenId);
    }
}

File 7 of 15 : ERC721Enumerable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

File 8 of 15 : IERC721Enumerable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {

    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

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

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

File 9 of 15 : IERC721Metadata.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {

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

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

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

File 10 of 15 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

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

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 11 of 15 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

    function _msgData() internal view virtual returns (bytes calldata) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

File 12 of 15 : Counters.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

File 13 of 15 : Strings.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant alphabet = "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] = alphabet[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

}

File 14 of 15 : ERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

File 15 of 15 : IERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

Settings
{
  "remappings": [],
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "evmVersion": "byzantium",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

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utability":"payable","type":"function"},{"inputs":[],"name":"mintPrice","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":"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":[],"name":"preSaleIsActive","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"numberOfTokens","type":"uint256"}],"name":"presaleMint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"provenance","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"reservedAmount","type":"uint256"},{"internalType":"address","name":"mintAddress","type":"address"}],"name":"reserveMint","outputs":[],"stateMutability":"nonpayable","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":[],"name":"saleIsActive","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newAfterlifeContractAddress","type":"address"}],"name":"setAfterlifeContractAddress","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":"address","name":"newAuraContractAddress","type":"address"}],"name":"setAuraContractAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"newBaseURI","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newLimit","type":"uint256"}],"name":"setMaxPresaleMintsPerWallet","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"maxImpermanentSupply","type":"uint256"}],"name":"setMaxTokenSupply","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newPrice","type":"uint256"}],"name":"setMintPrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"provenanceHash","type":"string"}],"name":"setProvenanceHash","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"setStartingIndex","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"startingIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"startingIndexBlock","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","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"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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000115c0000000000000000000000000000000000000000000000000000000000000012496d7065726d616e656e744469676974616c000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000024944000000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : name (string): ImpermanentDigital
Arg [1] : symbol (string): ID
Arg [2] : maxImpermanentSupply (uint256): 4444

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [2] : 000000000000000000000000000000000000000000000000000000000000115c
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [4] : 496d7065726d616e656e744469676974616c0000000000000000000000000000
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [6] : 4944000000000000000000000000000000000000000000000000000000000000


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.