Contract 0xfAA5018134192eed6Ffc13A862724bFAFa05A8f8 2

 
 
Txn Hash
Method
Block
From
To
Value
0x967573359d37a2337bb7168179188e9b152828158601ec925ba1448bf1ce1508Safe Transfer Fr...165018212023-01-28 0:47:115 days 20 hrs agoENS Name xs.gott3d.eth IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80 Ether0.00145438 16.6335028
0xd4218efa1e4b38b62978fd780a95cdeb49126f938ced49f770c8d6a89bce44faSet Approval For...164515172023-01-21 0:11:5912 days 21 hrs ago0x1f417f8548279e270f0f89973cca6e4626b47f18 IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80 Ether0.00122213 26.38238955
0x8479f9ad427183ce4abf3c9eff66887508e5199bbc3f87649483af29624b5775Safe Transfer Fr...163791542023-01-10 21:39:3523 days 5 mins ago0x7be7d0907aa13703d2f6092183fe48e827f57d9a IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80 Ether0.0021657 21.6784707
0xb170638e1f1956e09ffc80c1fee5693e507bcf5e9af67dba4aace54064c540e6Mint163728302023-01-10 0:30:3523 days 21 hrs ago0x1771e483fc81a4a35fb659f18e75a55e8af0cde8 IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00498143 24.01024904
0x350403d2b3982e74ecd58eb900af9abc6249b65d6550323e4af295918fb42f82Mint162952582022-12-30 4:40:2334 days 17 hrs ago0x93f5c71ab5216e6b0a25d11733805a07f8c492e7 IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00308594 14.67606026
0x8dd7abba1b56285a95e0a975aab4326a3aefcff26b23cc7d21645d0045ee6366Set Approval For...162550582022-12-24 14:01:3540 days 7 hrs ago0x00c3939ad329208439776980904609b940c20100 IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80 Ether0.00072025 15.54813691
0x7539c7b68f9b847e9c0b10f9673c76b44242cb800cbbd11fd26fa8eb778cd13eMint162076402022-12-17 23:16:3546 days 22 hrs agoENS Name *💸elpatrón💸.eth IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00299841 14.45220094
0x0ea9a7bf175f7701fb4a1c65904501b18472881b5ede17de93d6d9ea2beb06f2Mint161865892022-12-15 0:42:4749 days 21 hrs ago0x93f5c71ab5216e6b0a25d11733805a07f8c492e7 IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00298984 14.41091951
0xa6633fe1f40a5b7ffa15fb647f323a896e611def52cd4517c6119219ae87e881Mint161860922022-12-14 23:02:3549 days 22 hrs ago0x01d1caa915cbb6dea512537fa3e22578e9a5991b IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00467839 22.24935241
0xf56c0a489484643483df474dadd705b800bda6e87eae16a9ba9a28544a26e6ccMint161858872022-12-14 22:21:3549 days 23 hrs ago0x01d1caa915cbb6dea512537fa3e22578e9a5991b IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.1332 Ether0.00498712 13.4597363
0x42c941e57ee9f1300e8aafdcdd2d1468b98e72638525d50653775e4d89ed8364Mint161422262022-12-08 19:57:4756 days 1 hr ago0x7c4f32d702c5327ac7a1bfb404fb27ce95ed6be3 IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00345312 16.64387908
0xcd7b107ff2b4dc1dab72bf8a3a752fd5138fce2c46f22eabc916b6c3a02c8562Set Approval For...161413852022-12-08 17:08:4756 days 4 hrs agoENS Name nftrascal.eth IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80 Ether0.00144071 31.10080859
0x88953d27871090650aa7f7d0b6ecea61bcbf982998eb6c9223f24ede3403199fMint161298012022-12-07 2:03:3557 days 19 hrs ago0xf5a3e3709b4a08b4d95a22ecbb74363eddac4ef8 IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00299835 14.45190915
0x8fbc23eb65e5fea95308919800a118bc2c284358a95d03d630cdb5c5ec5b4d5cStagedive161213682022-12-05 21:47:5958 days 23 hrs ago0x5e168f831801b53472b9942e30de980a92017fdf IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80 Ether0.00919069 12.82455476
0x1a97005d4717b0745cf29eaf4ced40887a45c20f534e50c55341e43def553766Mint160942232022-12-02 2:45:4762 days 18 hrs agoENS Name unmoved.eth IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00245988 11.85654163
0x1980e3d9497f4aacc184ff2533a54895aa7479214a45345e011ebbb474e3ed79Safe Transfer Fr...160752032022-11-29 10:58:4765 days 10 hrs ago0x1770c19cb46f92eb698a131f37d9df2d0ad48331 IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80 Ether0.00100998 11.63317131
0xf4ba7fc1e7cbbcb467ac28aac82c74860745dc2772a31ad1ae8d631075d46f6aSafe Transfer Fr...160719742022-11-29 0:08:4765 days 21 hrs agoENS Name sherrybeary.eth IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80 Ether0.00104072 11.61428402
0x5ba6a7a72fdf8dcf9cd85ab9e08a0a79d4bda99f41418e214e0b03f28a0afbf1Safe Transfer Fr...160649562022-11-28 0:40:2366 days 21 hrs ago0x05d460310a2d785d0bd5b586c8f6402e70366fae IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80 Ether0.00093528 10.78073033
0x9ad48453458420e0fe0a995ceb843c36ba368bea83d49c0f9ccb875cfb54e66dMint160429212022-11-24 22:47:3569 days 22 hrs agoENS Name definitecash.eth IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00264079 12.72849416
0x945e70a539b0bbb4cd069d6dd61d5278d3a91d6e22eb99424bb14fd0af601423Mint160333162022-11-23 14:33:2371 days 7 hrs ago0x7c127c92eba3f5a321116c59ef5da709e61c0af0 IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00286883 13.8276506
0x933e9810f7e71eeee56f03540dde707a4985a73d44f2f672a6fbfcf2f2e8bec9Mint160285752022-11-22 22:39:1171 days 23 hrs ago0xaabfc54d77f37b4f437d34a3c415c56fafa05370 IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00290823 14.01757279
0x0d9cb7cc3450f12f10d125aa39980f0dedc17fea7bd5a742a7487e6e8c5209eaMint160235662022-11-22 5:49:1172 days 15 hrs agoENS Name gardenandgully.eth IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00221253 10.52229083
0xc9b65153b1842446d8f93ba43191279b74344a51b67f86e3f36231c2f0101620Set Approval For...160192072022-11-21 15:13:1173 days 6 hrs ago0xb7c7517a89a969cf0603955c7acacfab85e1c40a IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80 Ether0.00057483 12.40905033
0xa8383d048bfc0d3b4889d2efc33902971f1bc2d8f6809ab1dda599411599b9b6Mint159925232022-11-17 21:48:2376 days 23 hrs ago0x8f14d816dfead2c9806e3d0b598ee4f2ba8fde54 IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00311724 14.82488439
0xa674e7e90ab1749938f0d69907d963cf7bb00aa11aaff288117cafcb3ebf102eMint159761782022-11-15 14:57:3579 days 6 hrs agoENS Name cameoblooper.eth IN  0xfaa5018134192eed6ffc13a862724bfafa05a8f80.0666 Ether0.00435231 20.97795009
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0x589422fe4758428cb73f8d055c3d4620fd635bbf4b4a88c362d9a186a7ded65f145270172022-04-05 16:25:13303 days 5 hrs ago 0xfaa5018134192eed6ffc13a862724bfafa05a8f80x5e168f831801b53472b9942e30de980a92017fdf10.5894 Ether
0xfbece2d8c89fdf6e78b86532c0a94d30b4c11d783964782207eb97ca71a0ba92140822412022-01-26 16:06:06372 days 5 hrs ago 0xfaa5018134192eed6ffc13a862724bfafa05a8f8ENS Name sutty.eth0.1332 Ether
0xe39213744466c5f596d5fd0fb283bfab22e11a4b470b9a8908f6f13a99ee5a46140189442022-01-16 21:15:45382 days 29 mins ago 0xfaa5018134192eed6ffc13a862724bfafa05a8f8ENS Name msdinklepuff.eth0.0666 Ether
0x7c288c109a12f59072ef36a03c2cd55a4207daeaba083a6d9bcfa82a98db76c6139678582022-01-08 23:44:18389 days 22 hrs ago 0xfaa5018134192eed6ffc13a862724bfafa05a8f80x5e168f831801b53472b9942e30de980a92017fdf8.0586 Ether
0xa5488a17c87133c2769f1d8e11c43d532ccb3505941f24dfaf8b709fcf3a1c74139545852022-01-06 22:33:23391 days 23 hrs ago 0xfaa5018134192eed6ffc13a862724bfafa05a8f80x358d4f7856cbadbb786a13e354258d399eb1b2af0.0666 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
TheRockingUniquehorns

Compiler Version
v0.8.0+commit.c7dfd78e

Optimization Enabled:
Yes with 1000 runs

Other Settings:
default evmVersion
File 1 of 14 : TheRockingUniquehorns.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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

contract TheRockingUniquehorns is ERC721Enumerable, Ownable {

    using Counters for Counters.Counter;

    Counters.Counter private _returnedCounter;
    Counters.Counter private _refundableCounter;

    uint256 public MAX_SUPPLY = 9990;
    // reserved for team, giveaways, collabs, musicians
    uint256 public PROMO_TICKETS = 190;
    uint256 public PRICE = 0.0666 ether;

    uint256 public RETURN_PERIOD_START = 1638813966;   // December 6th 6:06:06pm UTC
    uint256 public RETURN_PERIOD_END = 1644516366;   // February 10th 6:06:06pm UTC

    // Provenance hash
    string public PROVENANCE;

    // will be moved to IPFS when sale has ended. needs to be centralized for instant reveal.
    string private _baseTokenURI;
    string private _contractURI;

    uint256 private _maxBookingTransactionSize = 10;
    uint256 private _maxBookingSizeWhitelist = 6;

    uint256 private _amountBlockedForRefund = 0 ether;

    bool private _salePaused = true;
    bool private _whitelistPaused = true;

    // possibly allow for additional refundable TRUs after whitelist
    uint256 private _maxReturnable = 0;

    struct TRUData {
        address discoveredBy;
        uint256 mintPrice;
        bool refundable;
    }

    //whitelist etc
    mapping(address => uint256) public whitelist;
    mapping(uint256 => TRUData) public originalBandMembers;

    bool private _running;

    address[] private _team;

    address private _returnPoolAddress = 0x73939879050B0C5216EC97928D53Ef49B4E984dC;

    event TRUCreated(address mintedBy, uint256 indexed id);

    modifier nonReentrant() {
        require(!_running, "No reentry");
        _running = true;
        _;
        _running = false;
    }

    constructor(uint256 maxSupply, uint256 promoTickets, uint256 returnPeriodStart, uint256 returnPeriodEnd, string memory initialBaseURI, string memory initialContractURI, address[] memory team) ERC721("The Rocking Uniquehorns", "TRU")  {
        MAX_SUPPLY = maxSupply;
        PROMO_TICKETS = promoTickets;
        RETURN_PERIOD_START = returnPeriodStart;
        RETURN_PERIOD_END = returnPeriodEnd;
        _baseTokenURI = initialBaseURI;
        _contractURI = initialContractURI;
        _team = team;
    }

    function mint(uint256 num) external payable nonReentrant {
        require( !_salePaused,                                       "The TRUs all passed out. Sale paused." );
        require( num <= _maxBookingTransactionSize,                  "You can't book that many TRUs in one transaction." );
        require( msg.value >= PRICE * num,                          "The Amount of Ether sent is not correct" );
        require( !_isSoldOut(),                                      "The TRUs are sold out." );

        // TRUs minted in public sale can only be refunded if total supply is <= _maxReturnable
        _mintInternal(msg.sender, num, totalSupply() <= _maxReturnable);
    }

    function mintWhitelist(uint256 num) external payable nonReentrant {
        require( !_whitelistPaused,                                     "The TRUs all passed out. Whitelist sale paused." );
        require(_isWalletWhitelisted(msg.sender),                       "Sorry, this address is not on the whitelist.");
        require( num <= _getWalletWhitelistMax(msg.sender),             "No one needs a band this big" );
        require( msg.value >= PRICE * num,                             "Ether sent is not correct" );
        require( !_isSoldOut(),                                         "The TRUs are sold out." );

        //TRUs minted during whitelist can always be refunded
        _mintInternal(msg.sender, num, true);
        whitelist[msg.sender] -= num;
    }

    /**
     * Fire your TRU, return the TRU to the pool and get back the mint price.
     */
    function fire(uint256[] memory tokenIds) external nonReentrant {
        require(_isRefundPeriodActive(),                "Return period is not active.");

        uint256 totalRefund = 0 ether;

        for(uint256 i = 0; i < tokenIds.length; i++){
            uint256 tokenId = tokenIds[i];
            if(ownerOf(tokenId) == msg.sender && originalBandMembers[tokenId].refundable) {
                //Transfer back to TRU to pool
                _transfer(msg.sender, _returnPoolAddress, tokenId);
                _returnedCounter.increment();
                totalRefund += originalBandMembers[tokenId].mintPrice;
            }
        }

        // refund former holder with the price that was paid during minting
        _widthdraw(msg.sender, totalRefund);
    }

    // Get the TRUs for the address
    function bandOfOwner(address addr) external view returns(uint256[] memory) {
        uint256 tokenCount = balanceOf(addr);

        uint256[] memory tokensId = new uint256[](tokenCount);
        for(uint256 i; i < tokenCount; i++){
            tokensId[i] = tokenOfOwnerByIndex(addr, i);
        }
        return tokensId;
    }

    /*
    * ONLY OWNER STUFF
    */

    // Get the Rocking Uniquehorns to play a promo gig
    // (Method to mint from the reserved TRUs)
    function playPromoGig(address to, uint256 amount) external onlyOwner {
        require( amount <= PROMO_TICKETS, "Not enough promo tickets. This would exceed reserved TRU supply" );

        //promo TRUs can't be refunded
        _mintInternal(to, amount, false);
        PROMO_TICKETS -= amount;
    }

    // Get the TRUs to do a massive stagedive
    // Method to airdrop 1 TRU into every wallet address in the provided list
    function stagedive(address[] memory addresses) external onlyOwner {
        require( addresses.length <= PROMO_TICKETS, "Not enough promo tickets. This would exceed reserved TRU supply" );

        for (uint256 i = 0; i < addresses.length; i++) {
            //promo TRUs can't be refunded
            _mintInternal(addresses[i], 1, false);
            PROMO_TICKETS--;
        }
    }

    // founding band members get the first 5 TRUs for their team pfps
    function castFoundingBand() external onlyOwner {
        for(uint256 i = 0; i < _team.length; i++) {
            _mintInternal(_team[i], 1, false);
        }
        PROMO_TICKETS -= _team.length;
    }

    function withdraw() external payable onlyOwner {
        //make sure the funds needed for potential refunds stay on the contract until return period is over
        _widthdraw(owner(), address(this).balance - _getAmountBlockedForRefund());
    }

    // Setters

    function setProvenanceHash(string memory provenanceHash) external onlyOwner {
        PROVENANCE = provenanceHash;
    }

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

    function setContractURI(string memory newURI) external onlyOwner {
        _contractURI = newURI;
    }

    function setReturnPoolAddress(address addr) external onlyOwner {
        _returnPoolAddress = addr;
    }

    function setMaxBookingSizes(uint256 maxBookingTransactionSize, uint256 maxBookingSizeWhitelist) external onlyOwner {
        _maxBookingTransactionSize = maxBookingTransactionSize;
        _maxBookingSizeWhitelist = maxBookingSizeWhitelist;
    }

    // They are rockstars after all, who knows when they are hung over and need a break.
    function setPauseStates(bool salesPaused, bool whitelistPaused) external onlyOwner {
        _salePaused = salesPaused;
        _whitelistPaused = whitelistPaused;
    }

    function addToWhitelist(address[] memory addresses) external onlyOwner {
        for(uint256 i = 0; i < addresses.length; i++) {
            whitelist[addresses[i]] = _maxBookingSizeWhitelist;
        }
    }

    // edit or remove addresses (set amount to 0) from whitelist
    function editWhitelist(address[] memory addresses, uint256[] memory amounts) external onlyOwner {
        for (uint256 i = 0; i < addresses.length; i++) {
            whitelist[addresses[i]] = amounts[i];
        }
    }

    /*
    * Public view stuff
    */

    function isSaleActive() public view returns(bool) {
        return !_salePaused;
    }

    function isWhitelistSaleActive() public view returns(bool) {
        return !_whitelistPaused;
    }

    function getMaxMintableTransactionForWallet(address addr) public view returns(uint256) {
        return _getMaxMintableTransactionForWallet(addr) - 1;
    }

    function getAmountBlockedForRefund() public view returns (uint256) {
        return _getAmountBlockedForRefund();
    }

    function isWalletWhitelisted(address addr) public view returns (bool) {
        return _isWalletWhitelisted(addr);
    }

    function getWalletWhitelistMax(address addr) public view returns (uint256) {
        return _getWalletWhitelistMax(addr);
    }

    function isEligibleForRefund(uint256 tokenId) public view returns (bool) {
        return _isRefundPeriodActive() && originalBandMembers[tokenId].refundable;
    }

    function getRefundValue(uint256 tokenId) public view returns (uint256) {
        return originalBandMembers[tokenId].refundable ? originalBandMembers[tokenId].mintPrice : 0;
    }

    function getTotalReturned() public view returns (uint256) {
        return _returnedCounter.current();
    }

    function getTotalRefundable() public view returns (uint256) {
        return _refundableCounter.current();
    }

    function getPrice() public view returns (uint256) {
        return PRICE;
    }

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

    function isSoldOut() public view returns (bool) {
        return _isSoldOut();
    }

    // like every good rockstar, we sometimes cover & sample stuff (override section)
    function _baseURI() internal view virtual override returns (string memory) {
        return _baseTokenURI;
    }

    //private stuff

    function _isSoldOut() private view returns (bool) {
        return !(totalSupply() < MAX_SUPPLY - PROMO_TICKETS);
    }

    function _getAmountBlockedForRefund() private view returns (uint256) {
        if(block.timestamp < RETURN_PERIOD_END) {
            return _amountBlockedForRefund;
        }
        return 0;
    }

    function _isWalletWhitelisted(address addr) private view returns (bool) {
        return whitelist[addr] > 0;
    }

    function _getMaxMintableTransactionForWallet(address addr) private view returns(uint256) {
        if(!_whitelistPaused) {
            return _getWalletWhitelistMax(addr);
        }
        else if(!_salePaused) {
            return _maxBookingTransactionSize;
        }
        return 1;
    }

    function _getWalletWhitelistMax(address addr) private view returns (uint256) {
        return whitelist[addr];
    }

    function _isRefundPeriodActive() private view returns (bool) {
        return block.timestamp > RETURN_PERIOD_START && block.timestamp < RETURN_PERIOD_END;
    }

    function _mintInternal(address to, uint256 amount, bool refundable) private {
        uint256 supply = totalSupply();
        require( supply + amount <= MAX_SUPPLY,     "Exceeds maximum TRU supply" );

        for(uint256 i = 0; i < amount; i++){
            uint256 id = supply + i;
            _safeMint( to, id );
            emit TRUCreated(msg.sender, id);
            originalBandMembers[id].discoveredBy = to;
            originalBandMembers[id].mintPrice = PRICE;
            originalBandMembers[id].refundable = refundable;
            if(refundable) {
                _refundableCounter.increment();
                _amountBlockedForRefund += PRICE;
            }
        }
    }

    function _widthdraw(address addr, uint256 amount) private {
        require(payable(addr).send(amount), "Transfer failed");
    }

}

File 2 of 14 : 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 3 of 14 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

File 4 of 14 : 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, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

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

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

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

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

File 5 of 14 : ERC721.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        _approve(to, tokenId);
    }

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

        return _tokenApprovals[tokenId];
    }

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

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

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

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

        _transfer(from, to, tokenId);
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        _beforeTokenTransfer(from, to, tokenId);

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

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

        emit Transfer(from, to, tokenId);
    }

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

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

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

File 6 of 14 : 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 7 of 14 : 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 8 of 14 : 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 9 of 14 : 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 14 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

File 11 of 14 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

File 12 of 14 : Strings.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

File 13 of 14 : 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 14 of 14 : IERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

Contract Security Audit

Contract ABI

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

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

-----Decoded View---------------
Arg [0] : maxSupply (uint256): 9990
Arg [1] : promoTickets (uint256): 190
Arg [2] : returnPeriodStart (uint256): 1638813966
Arg [3] : returnPeriodEnd (uint256): 1644516366
Arg [4] : initialBaseURI (string): https://s3.eu-central-1.amazonaws.com/api.rockinguniquehorns.com/public/
Arg [5] : initialContractURI (string): https://rockinguniquehorns.com/contract/metadata
Arg [6] : team (address[]): 0x62f163a73f1da758870B37561584D963e9B92A35,0xdab86752Eae07F5c85C04be9915335a263dc2aA4,0x99F869568E53B860Eaee4C1a85Fc1A0528cf0054,0xBa0FcEBC576c29fD17b6d9399f7fd7F5c88715Cc,0x4204af0e5CF666cEbcF574121ec15C05DeaEC2FF,0x89dEB4b1D9a224c74C4A8C7Ec5f87f0f445f4b4F,0x89dEB4b1D9a224c74C4A8C7Ec5f87f0f445f4b4F

-----Encoded View---------------
22 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000002706
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000be
Arg [2] : 0000000000000000000000000000000000000000000000000000000061ae510e
Arg [3] : 000000000000000000000000000000000000000000000000000000006205540e
Arg [4] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000160
Arg [6] : 00000000000000000000000000000000000000000000000000000000000001c0
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000048
Arg [8] : 68747470733a2f2f73332e65752d63656e7472616c2d312e616d617a6f6e6177
Arg [9] : 732e636f6d2f6170692e726f636b696e67756e69717565686f726e732e636f6d
Arg [10] : 2f7075626c69632f000000000000000000000000000000000000000000000000
Arg [11] : 0000000000000000000000000000000000000000000000000000000000000030
Arg [12] : 68747470733a2f2f726f636b696e67756e69717565686f726e732e636f6d2f63
Arg [13] : 6f6e74726163742f6d6574616461746100000000000000000000000000000000
Arg [14] : 0000000000000000000000000000000000000000000000000000000000000007
Arg [15] : 00000000000000000000000062f163a73f1da758870b37561584d963e9b92a35
Arg [16] : 000000000000000000000000dab86752eae07f5c85c04be9915335a263dc2aa4
Arg [17] : 00000000000000000000000099f869568e53b860eaee4c1a85fc1a0528cf0054
Arg [18] : 000000000000000000000000ba0fcebc576c29fd17b6d9399f7fd7f5c88715cc
Arg [19] : 0000000000000000000000004204af0e5cf666cebcf574121ec15c05deaec2ff
Arg [20] : 00000000000000000000000089deb4b1d9a224c74c4a8c7ec5f87f0f445f4b4f
Arg [21] : 00000000000000000000000089deb4b1d9a224c74c4a8c7ec5f87f0f445f4b4f


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.