Contract 0xdf0E921f7e5A837805BfbE02012db648a12d72Cc 1

 
 
Txn Hash
Method
Block
From
To
Value
0xeed244060a1e170796670f5a824d5e0be2c4a54feebfe62c154201fe3bac4baeSet Approval For...161306782022-12-07 5:05:472 hrs agoENS Name jhass.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00081994 17.76729363
0xd6eec91dd351c13c022ed8dcf43a7acf86c82cdd46ff81d388d534ea36bf6396Set Approval For...161293612022-12-07 0:33:236 hrs 33 mins ago0x1da1e8b5ab50676452168c79cf46cb6aff9c86c7 IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00066929 14.50284825
0x680bc95fffec757128ee635c6cdd1f125bea227e3a8f4623ca040ef9375ef39fSet Approval For...161233962022-12-06 4:34:591 day 2 hrs ago0xacf72b76eddeda34b2030107f5534916d19b0903 IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.0005167 11.19653604
0xc8c68d7c193b813699ebb971930351de978656ae333223c4b1a735537351462fApprove161211562022-12-05 21:05:351 day 10 hrs agoENS Name byldr.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00070606 13.84516706
0xa9356ed75b5375a5af2d23ed01d630e14510ff2d143667a00beae6b6b6322121Set Approval For...161055792022-12-03 16:48:233 days 14 hrs agoENS Name ethanpierse.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00058958 12.77565686
0xd88cc93bd9fd9879b39f6afa987113c095e37785c29913bcdb4f035ea5a8a366Set Approval For...160956742022-12-02 7:37:354 days 23 hrs agoENS Name triiton.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00052567 11.39090915
0x9129fe7ddd0c70d22e0f8e207b6e6ad54281bdc285e4561a66534458dd1b7725Set Approval For...160862852022-12-01 0:10:356 days 6 hrs agoENS Name coachbpatel.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00027948 11.49147364
0x5a06f306c2016fefbb588a7c4bc10ef3b19e4e244307e608e3bb18899e9f8906Set Approval For...160862542022-12-01 0:04:116 days 7 hrs agoENS Name coachbpatel.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.0003017 12.40513296
0x3de026a74990ce86396da4c13f31bf58afc8c218ab2683aaadd5563d57ea0686Set Approval For...160786062022-11-29 22:24:117 days 8 hrs ago0x39bff2637b5ad19713fc5df6ae3736eed041d0f3 IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.000451169.77621737
0xb316c7597cc116145a5acb2b009444168fd1f673137e6d701b5ff26b0a8f946bSet Approval For...160772512022-11-29 17:50:597 days 13 hrs agoENS Name rinako.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00056394 12.22005541
0xb06644f8fbdbcdf971f260004dcf2ecb7d5ecb97494e3cdb560fbc821058f12fSafe Transfer Fr...160671202022-11-28 7:54:118 days 23 hrs agoENS Name thedeviousdead.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00052537 10.09536083
0xef23707dfc70adaa3eb2e579f0bd4261498f01ce21259e58c67b10d6093c6b1bSafe Transfer Fr...160671162022-11-28 7:53:238 days 23 hrs agoENS Name thedeviousdead.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00071161 10.28275491
0x796e08acf13667d0b8f798222afbc422fa2119168eaf931797b8a6b80df9169bSet Approval For...160626762022-11-27 17:00:119 days 14 hrs ago0xe2d062e2c9e59f696d8090763df1bd2f79ac206b IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00048186 10.44158516
0xd68829f5ecbab310f0de53932f12bd448a594b6ee0220cc07adcb01b29da9a03Set Approval For...160435122022-11-25 0:46:2312 days 6 hrs agoENS Name chewyalexander.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00054048 11.7117533
0x9edcafc91ab595dd2db3ecbedab31fedad1e57e8932068683f6cdd8c504e3d8fSet Approval For...160417822022-11-24 18:58:5912 days 12 hrs ago0xb53b90f5ca96aed97b2c16d9761e5bc54064962a IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00057147 12.38320152
0x20229d2ba3a6452c90b6a54517050c787012a6900bfaec14d7b2233888c28774Set Approval For...160407342022-11-24 15:28:2312 days 15 hrs ago0x98dc52684e201d2317e5a6f9419aeb89c5b8f1ba IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00073338 15.89166042
0xbb47e382366ccfc05cce745eb0dce3d0ad1b92af6b3cc1b9074406e9a0d714e5Set Approval For...160337812022-11-23 16:06:2313 days 15 hrs ago0xfa8ed87d6e962f124e446f18f1b9592d53a1dd3f IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.0009294 20.13924446
0x857ba450ca20443506ff1fb8fe57d69707e0a8a40789e1755f6194fe430106c3Set Approval For...160335912022-11-23 15:28:2313 days 15 hrs ago0x91b46187b50f5dea43b4e32ed34e3dce75cf0bb4 IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00070884 15.35998394
0x8ac5fcf7e3e4d99450c21fbd766f3d66138dd1917fb4b254e8594c3ec3de4432Set Approval For...160315992022-11-23 8:47:5913 days 22 hrs agoENS Name thedeviousdead.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00063275 13.71110753
0xc9682fc0102cc1b27fb6a57b024533ea2d7b263ebcd77982ce3ab945d907d570Set Approval For...160181722022-11-21 11:44:4715 days 19 hrs agoENS Name switcheroo.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00052165 11.30366913
0xef71c378dfd599722642a89112bf0599f8dad769fbe654840e5e20ec612c4b99Set Approval For...160143092022-11-20 22:48:2316 days 8 hrs agoENS Name scavengerhunt.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00027196 11.1822734
0xfc9add2e6c91979dd0b0b8fa31b5f55ef1c7d6af21d8251e1ce0921bbb8e71d7Set Approval For...160126872022-11-20 17:22:2316 days 13 hrs agoENS Name nunoeu.eth IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00078441 16.99737499
0x20aa61daf8e10614f4eb32fa9627badbd48284107be7e5db015a5edc5ac2cf71Set Approval For...160125952022-11-20 17:03:5916 days 14 hrs ago0xcf1998b33fe4c6a3675db7ea32f652345a39d864 IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00071792 15.55670933
0x43d6e181946d954c2832a56f6e61d09bcaefc6b8140adeb997d8d9094d4c392fSet Approval For...159871732022-11-17 3:51:5920 days 3 hrs ago0x9e63b61fb3f4e0e0605ef5da5d7d6f5715b56968 IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00075142 16.28268037
0xa8e6c44fa82683503bded541bccca50aa41d28036a9b405f7f55b0cd965d8f2bSet Approval For...159817772022-11-16 9:45:2320 days 21 hrs ago0xd7f7d9e3bede131e680c2fd17c68c54423f7afdb IN  0xdf0e921f7e5a837805bfbe02012db648a12d72cc0 Ether0.00066558 14.42261471
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Latest 6 internal transactions
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0x2c784a60ddc07a359a37c15ec3d178cacd94f461dafb1320cf84d5416b7fa92f144446652022-03-23 20:14:16258 days 10 hrs ago 0xdf0e921f7e5a837805bfbe02012db648a12d72cc 0xe753f1f67f610ad9f98c441873dc54a0972015906.044 Ether
0x2d7604087f8b31a8778ba6d12b8b966439c85516273253127a82351405323aa9144307412022-03-21 16:18:00260 days 14 hrs ago 0xdf0e921f7e5a837805bfbe02012db648a12d72cc 0xe753f1f67f610ad9f98c441873dc54a09720159014.106 Ether
0x2919db6ab074729b7977c204b2ce0f250abd6558185034eaa6850dcb76ccb86d144058012022-03-17 19:10:33264 days 11 hrs ago 0xdf0e921f7e5a837805bfbe02012db648a12d72cc 0xe753f1f67f610ad9f98c441873dc54a09720159094.419 Ether
0x28b54191cb86d085a3204ac540b8ed4f503e998c008f66d3588bbfbb807e0105143997682022-03-16 20:32:55265 days 10 hrs ago 0xdf0e921f7e5a837805bfbe02012db648a12d72cc 0xe753f1f67f610ad9f98c441873dc54a09720159063.784 Ether
0x58c4207f6a36f001081297789c54d70f26febf83bfe6e6c0c81dd07521d6e5fc143855912022-03-14 15:40:20267 days 15 hrs ago 0xdf0e921f7e5a837805bfbe02012db648a12d72cc 0xe753f1f67f610ad9f98c441873dc54a0972015905.708 Ether
0x51a77af55d07252a3420a7dbf78dc5fc819e64bd62cffb3fee878c39ed23425a143747112022-03-12 22:41:07269 days 8 hrs ago 0xdf0e921f7e5a837805bfbe02012db648a12d72cc 0xe753f1f67f610ad9f98c441873dc54a097201590367.279 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
PhunkyFungi

Compiler Version
v0.8.9+commit.e5eed63a

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 14 : PhunkyFungi.sol
/*
The Phunky Fungi Collection
https://phunkyfungi.io
Twitter @PhunkyFungi

Crafted with love by
Fueled on Bacon
https://fueledonbacon.com
*/
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "./MultiSigOwnable.sol";
import "./ERC721A.sol";

contract PhunkyFungi is ERC721A, MultisigOwnable {
    using Strings for uint256;

    address private immutable _revenueRecipient;
    
    bytes32 private _presaleMerkleRoot;
    bytes32 private _collabMerkleRoot;

    mapping(address=>uint) private _presaleClaimed;
    mapping(address=>bool) private _collabClaimed;

    string private _baseUri;
    string private _placeholderURI;
    
    bool public listsFinalized    = false;
    bool public metadataFinalized = false;
    bool public timesFinalized    = false;
    bool public airdropped        = false;
    bool public revealed          = false;

    bool private _overrideCollab  = false;
    bool private _overridePresale = false;
    bool private _overridePublic  = false;

    uint public constant PRESALE_LIMIT   = 3;
    uint public constant PUBLIC_LIMIT    = 5;
    uint public constant COLLECTION_SIZE = 9200;
    uint public constant PRESALE_PRICE   = 0.098 ether;
    uint public constant PUBLIC_PRICE    = 0.125 ether;
    uint public constant TEAM_AIRDROP_LIMIT = 100;

    uint public presaleStart = 1647097200; // 2022-03-12 10:00am EST
    uint public presaleEnd   = 1647104400; // 2022-03-12 12:00pm EST
    uint public collabStart  = 1647099000; // 2022-03-12 10:30am EST
    uint public collabEnd    = 1647104400; // 2022-03-12 12:00pm EST
    uint public publicStart  = 1647104400; // 2022-03-12 12:00pm EST

    constructor(
        address revenueRecipient,
        bytes32 presaleMerkleRoot,
        bytes32 collabMerkleRoot,
        string memory placeholderURI
    )
        ERC721A("PhunkyFungi", "PF")
    {
        _revenueRecipient  = revenueRecipient;
        _presaleMerkleRoot = presaleMerkleRoot;
        _collabMerkleRoot  = collabMerkleRoot;
        _placeholderURI    = placeholderURI;
    }

    /// @notice the initial 100 tokens will be minted to the team vault for use in giveaways and collaborations.
    function airdrop(address to, uint quantity) external onlyOwner {
        require(airdropped == false, "ALREADY_AIRDROPPED");
        require(quantity <= TEAM_AIRDROP_LIMIT, "EXCEEDS_AIRDROP_LIMIT");
        airdropped = true;
        _safeMint(to, quantity);
    }
    
    function isCollabSaleActive() public view returns(bool){
        if(_overrideCollab){
            return true;
        }
        return block.timestamp > collabStart && block.timestamp < collabEnd;
    }

    function isPresaleActive() public view returns(bool){
        if(_overridePresale){
            return true;
        }
        return block.timestamp > presaleStart && block.timestamp < presaleEnd;
    }

    function isPublicSaleActive() public view returns(bool){
        if(_overridePublic){
            return true;
        }
        return block.timestamp > publicStart;
    }

    function setPresaleMerkleRoot(bytes32 root) external onlyOwner {
        require(listsFinalized == false, "LIST_FINALIZED");
        _presaleMerkleRoot = root;
    }

    function setCollabMerkleRoot(bytes32 root) external onlyOwner {
        require(listsFinalized == false, "LIST_FINALIZED");
        _collabMerkleRoot = root;
    }

    function setPresaleTimes(
        uint _presaleStartTime,
        uint _presaleEndTime
    ) onlyOwner external {
        require(timesFinalized == false, "TIMES_FINALIZED");
        presaleStart = _presaleStartTime;
        presaleEnd   = _presaleEndTime;
    }

    function setCollabSaleTimes(
        uint _collabStartTime,
        uint _collabEndTime
    ) onlyOwner external {
        require(timesFinalized == false, "TIMES_FINALIZED");
        collabStart = _collabStartTime;
        collabEnd   = _collabEndTime;
    }

    function setPublicSaleTimes(
        uint _publicStartTime
    ) onlyOwner external {
        require(timesFinalized == false, "TIMES_FINALIZED");
        publicStart = _publicStartTime;
    }

    function toggleReveal() external onlyOwner {
        require(metadataFinalized == false, "METADATA_FINALIZED");
        revealed = !revealed;
    }

    function toggleCollab() external onlyOwner {
        require(timesFinalized == false, "TIMES_FINALIZED");
        _overrideCollab = !_overrideCollab;
    }

    function togglePresale() external onlyOwner {
        require(timesFinalized == false, "TIMES_FINALIZED");
        _overridePresale = !_overridePresale;
    }

    function togglePublic() external onlyOwner {
        require(timesFinalized == false, "TIMES_FINALIZED");
        _overridePublic = !_overridePublic;
    }

    function finalizeMetadata() external onlyOwner {
        require(metadataFinalized == false, "METADATA_FINALIZED");
        metadataFinalized = true;
    }

    function finalizeTimes() external onlyOwner {
        require(timesFinalized == false, "TIMES_FINALIZED");
        timesFinalized = true;
    }

    function finalizeLists() external onlyOwner {
        require(listsFinalized == false, "LIST_FINALIZED");
        listsFinalized = true;
    }
    
    function setBaseURI(string memory baseUri) external onlyOwner {
        require(metadataFinalized == false, "METADATA_FINALIZED");
        _baseUri = baseUri;
    }

    function setPlaceholderURI(string memory placeholderUri) external onlyOwner {
        require(metadataFinalized == false, "METADATA_FINALIZED");
        _placeholderURI = placeholderUri;
    }

    /// @dev override base uri. It will be combined with token ID
    function _baseURI() internal view override returns (string memory) {
        return _baseUri;
    }

    /// @notice Withdraw's contract's balance to the withdrawal address
    function withdraw() external {
        uint256 balance = address(this).balance;
        require(balance > 0, "NO_BALANCE");

        (bool success, ) = payable(_revenueRecipient).call{ value: balance }("");
        require(success, "WITHDRAW_FAILED");
    }

    function _verifyList(bytes32[] calldata _merkleProof, bytes32 root, address addr) internal view returns(bool) {
        return (MerkleProof.verify(_merkleProof, root, keccak256(abi.encodePacked(addr))) == true);
    }

    function verifyPresale(bytes32[] calldata _merkleProof, address addr) public view returns(bool) {
       return _verifyList(_merkleProof, _presaleMerkleRoot, addr);
    }

    function verifyCollab(bytes32[] calldata _merkleProof, address addr) public view returns(bool) {
       return _verifyList(_merkleProof, _collabMerkleRoot, addr);
    }
    
    /// @notice each address on the collaboration list may mint 1 token at the collab sale price
    function collabMint(bytes32[] calldata _merkleProof) external payable {
        require(isCollabSaleActive(), "COLLAB_SALE_INACTIVE");
        require(_collabClaimed[msg.sender] == false, "1_TOKEN_LIMIT");
        require(totalSupply() < COLLECTION_SIZE, "EXCEEDS_COLLECTION_SIZE");
        require(verifyCollab(_merkleProof, msg.sender), "COLLAB_NOT_VERIFIED");
        require(msg.value >= PRESALE_PRICE, "VALUE_TOO_LOW");
        _collabClaimed[msg.sender] = true;

        _safeMint(msg.sender, 1);
    }
    
    /// @notice each address on the presale list may mint up to 3 tokens at the presale price
    function presaleMint(bytes32[] calldata _merkleProof, uint quantity) external payable {
        require(isPresaleActive(), "PRESALE_INACTIVE");
        require(verifyPresale(_merkleProof, msg.sender), "PRESALE_NOT_VERIFIED");
        require(totalSupply() + quantity <= COLLECTION_SIZE, "EXCEEDS_COLLECTION_SIZE");
        require(_presaleClaimed[msg.sender] + quantity <= PRESALE_LIMIT, "3_TOKEN_LIMIT");
        uint cost;
        cost = quantity * PRESALE_PRICE;
        require(msg.value >= cost, "VALUE_TOO_LOW");
        _presaleClaimed[msg.sender] += quantity;

        _safeMint(msg.sender, quantity);
    }

    /// @notice may mint up to 5 tokens per transaction at the public sale price.
    function mint(uint quantity) external payable {
        require(isPublicSaleActive(), "PUBLIC_SALE_INACTIVE");
        require(quantity <= PUBLIC_LIMIT, "5_TOKEN_LIMIT");
        require(totalSupply() + quantity <= COLLECTION_SIZE, "EXCEEDS_COLLECTION_SIZE");
        uint cost;
        cost = quantity * PUBLIC_PRICE;
        require(msg.value >= cost, "VALUE_TOO_LOW");

        _safeMint(msg.sender, quantity);
    }

    function tokenURI(uint256 id) public view override returns (string memory) {
        require(_exists(id), "INVALID_ID");

        return revealed
            ? string(abi.encodePacked(_baseURI(), id.toString(), ".json"))
            : _placeholderURI;
    }
}

File 2 of 14 : ERC721A.sol
// SPDX-License-Identifier: MIT
// Creator: Chiru Labs

// Fork of ERC721A.sol (it's not the same one as on npm package erc721a because this one has extension methods removed)

pragma solidity ^0.8.4;

import '@openzeppelin/contracts/token/ERC721/IERC721.sol';
import '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol';
import '@openzeppelin/contracts/utils/Address.sol';
import '@openzeppelin/contracts/utils/Context.sol';
import '@openzeppelin/contracts/utils/Strings.sol';
import '@openzeppelin/contracts/utils/introspection/ERC165.sol';

error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintedQueryForZeroAddress();
error BurnedQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerIndexOutOfBounds();
error OwnerQueryForNonexistentToken();
error TokenIndexOutOfBounds();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error URIQueryForNonexistentToken();

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints.
 *
 * Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..).
 *
 * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 *
 * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    // Compiler will pack this into a single 256bit word.
    struct TokenOwnership {
        // The address of the owner.
        address addr;
        // Keeps track of the start time of ownership with minimal overhead for tokenomics.
        uint64 startTimestamp;
        // Whether the token has been burned.
        bool burned;
    }

    // Compiler will pack this into a single 256bit word.
    struct AddressData {
        // Realistically, 2**64-1 is more than enough.
        uint64 balance;
        // Keeps track of mint count with minimal overhead for tokenomics.
        uint64 numberMinted;
        // Keeps track of burn count with minimal overhead for tokenomics.
        uint64 numberBurned;
    }

    // The tokenId of the next token to be minted.
    uint256 internal _currentIndex;

    // The number of tokens burned.
    uint256 internal _burnCounter;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

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

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

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

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

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view returns (uint256) {
        // Counter underflow is impossible as _burnCounter cannot be incremented
        // more than _currentIndex times
        unchecked {
            return _currentIndex - _burnCounter;    
        }
    }

    /**
     * @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 override returns (uint256) {
        if (owner == address(0)) revert BalanceQueryForZeroAddress();
        return uint256(_addressData[owner].balance);
    }

    function _numberMinted(address owner) internal view returns (uint256) {
        if (owner == address(0)) revert MintedQueryForZeroAddress();
        return uint256(_addressData[owner].numberMinted);
    }

    function _numberBurned(address owner) internal view returns (uint256) {
        if (owner == address(0)) revert BurnedQueryForZeroAddress();
        return uint256(_addressData[owner].numberBurned);
    }

    /**
     * Gas spent here starts off proportional to the maximum mint batch size.
     * It gradually moves to O(1) as tokens get transferred around in the collection over time.
     */
    function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
        uint256 curr = tokenId;

        unchecked {
            if (curr < _currentIndex) {
                TokenOwnership memory ownership = _ownerships[curr];
                if (!ownership.burned) {
                    if (ownership.addr != address(0)) {
                        return ownership;
                    }
                    // Invariant: 
                    // There will always be an ownership that has an address and is not burned 
                    // before an ownership that does not have an address and is not burned.
                    // Hence, curr will not underflow.
                    while (true) {
                        curr--;
                        ownership = _ownerships[curr];
                        if (ownership.addr != address(0)) {
                            return ownership;
                        }
                    }
                }
            }
        }
        revert OwnerQueryForNonexistentToken();
    }

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

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

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

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

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

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

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public override {
        address owner = ERC721A.ownerOf(tokenId);
        if (to == owner) revert ApprovalToCurrentOwner();

        if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
            revert ApprovalCallerNotOwnerNorApproved();
        }

        _approve(to, tokenId, owner);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view override returns (address) {
        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public override {
        if (operator == _msgSender()) revert ApproveToCaller();

        _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 {
        _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 {
        _transfer(from, to, tokenId);
        if (!_checkOnERC721Received(from, to, tokenId, _data)) {
            revert TransferToNonERC721ReceiverImplementer();
        }
    }

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

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

    /**
     * @dev Safely mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(
        address to,
        uint256 quantity,
        bytes memory _data
    ) internal {
        _mint(to, quantity, _data, true);
    }

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _mint(
        address to,
        uint256 quantity,
        bytes memory _data,
        bool safe
    ) internal {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

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

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
        unchecked {
            _addressData[to].balance += uint64(quantity);
            _addressData[to].numberMinted += uint64(quantity);

            _ownerships[startTokenId].addr = to;
            _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);

            uint256 updatedIndex = startTokenId;

            for (uint256 i; i < quantity; i++) {
                emit Transfer(address(0), to, updatedIndex);
                if (safe && !_checkOnERC721Received(address(0), to, updatedIndex, _data)) {
                    revert TransferToNonERC721ReceiverImplementer();
                }
                updatedIndex++;
            }

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

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) private {
        TokenOwnership memory prevOwnership = ownershipOf(tokenId);

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

        if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();
        if (to == address(0)) revert TransferToZeroAddress();

        _beforeTokenTransfers(from, to, tokenId, 1);

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

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            _addressData[from].balance -= 1;
            _addressData[to].balance += 1;

            _ownerships[tokenId].addr = to;
            _ownerships[tokenId].startTimestamp = uint64(block.timestamp);

            // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            if (_ownerships[nextTokenId].addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId < _currentIndex) {
                    _ownerships[nextTokenId].addr = prevOwnership.addr;
                    _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

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

    /**
     * @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 {
        TokenOwnership memory prevOwnership = ownershipOf(tokenId);

        _beforeTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);

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

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            _addressData[prevOwnership.addr].balance -= 1;
            _addressData[prevOwnership.addr].numberBurned += 1;

            // Keep track of who burned the token, and the timestamp of burning.
            _ownerships[tokenId].addr = prevOwnership.addr;
            _ownerships[tokenId].startTimestamp = uint64(block.timestamp);
            _ownerships[tokenId].burned = true;

            // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            if (_ownerships[nextTokenId].addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId < _currentIndex) {
                    _ownerships[nextTokenId].addr = prevOwnership.addr;
                    _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(prevOwnership.addr, address(0), tokenId);
        _afterTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);

        // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
        unchecked { 
            _burnCounter++;
        }
    }

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

    /**
     * @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 TransferToNonERC721ReceiverImplementer();
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
     * And also called before burning one token.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, `tokenId` will be burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

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

File 3 of 14 : MultiSigOwnable.sol
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/access/Ownable.sol";

/*
Opensea only allows EOAs to make changes to collections,
which makes it impossible to use multisigs to secure these NFT contracts
since when you want to make changes you need to transfer ownership to an EOA, who can rug.

This contract establishes a second owner that can change the EOA owner,
this way a multisig can give ownership to an EOA and later claim it back.
*/
abstract contract MultisigOwnable is Ownable {
    address public realOwner;

    constructor() {
        realOwner = msg.sender;
    }

    modifier onlyRealOwner() {
        require(realOwner == msg.sender, "MultisigOwnable: caller is not the real owner");
        _;
    }

    function transferRealOwnership(address newRealOwner) public onlyRealOwner {
        realOwner = newRealOwner;
    }

    function transferLowerOwnership(address newOwner) public onlyRealOwner {
        _transferOwnership(newOwner);
    }
}

File 4 of 14 : MerkleProof.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Trees proofs.
 *
 * The proofs can be generated using the JavaScript library
 * https://github.com/miguelmota/merkletreejs[merkletreejs].
 * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
 *
 * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            bytes32 proofElement = proof[i];
            if (computedHash <= proofElement) {
                // Hash(current computed hash + current element of the proof)
                computedHash = _efficientHash(computedHash, proofElement);
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = _efficientHash(proofElement, computedHash);
            }
        }
        return computedHash;
    }

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

File 6 of 14 : ERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

File 7 of 14 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

File 8 of 14 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

File 9 of 14 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

File 10 of 14 : IERC721Enumerable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

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

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

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

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

pragma solidity ^0.8.0;

import "../IERC721.sol";

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

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

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

File 12 of 14 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

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

File 13 of 14 : IERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

Contract Security Audit

Contract ABI

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

000000000000000000000000e753f1f67f610ad9f98c441873dc54a0972015909baea82a9cbb97cac9de16e8130fd5cbe8e23805220f6e89a0af7a64661874e6fb35f79b945e2daf7bc2a8eab11797f7969d23a1f677cc8097495a152354a66000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000035697066733a2f2f516d55646e663761416e34647652484c664474716854424b52696a4c6169733779534d7663577a3362574c51435a0000000000000000000000

-----Decoded View---------------
Arg [0] : revenueRecipient (address): 0xe753f1F67F610aD9f98C441873dC54A097201590
Arg [1] : presaleMerkleRoot (bytes32): 0x9baea82a9cbb97cac9de16e8130fd5cbe8e23805220f6e89a0af7a64661874e6
Arg [2] : collabMerkleRoot (bytes32): 0xfb35f79b945e2daf7bc2a8eab11797f7969d23a1f677cc8097495a152354a660
Arg [3] : placeholderURI (string): ipfs://QmUdnf7aAn4dvRHLfDtqhTBKRijLais7ySMvcWz3bWLQCZ

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 000000000000000000000000e753f1f67f610ad9f98c441873dc54a097201590
Arg [1] : 9baea82a9cbb97cac9de16e8130fd5cbe8e23805220f6e89a0af7a64661874e6
Arg [2] : fb35f79b945e2daf7bc2a8eab11797f7969d23a1f677cc8097495a152354a660
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000035
Arg [5] : 697066733a2f2f516d55646e663761416e34647652484c664474716854424b52
Arg [6] : 696a4c6169733779534d7663577a3362574c51435a0000000000000000000000


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.