Contract 0x7127206a49824D693932f9edCb77C53Fbb8443D7 9

 
Txn Hash
Method
Block
From
To
Value
0xd4d05abb4c8892c72cec7e2c9b68856855ade451649878d35c5a052186c100faSet Approval For...153062542022-08-09 5:54:081 hr 54 mins ago0x1d791b360d5590f28aec121a1383c35d93c16a58 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00052217 11.30906398
0x59b57ed2afa48cd3bc7c82858cf5d08156a73938694d0b111ce95b6d84807a43Set Approval For...153061522022-08-09 5:30:342 hrs 18 mins ago0xc5bb7d679055050dcc9002cd21e04b3630eb31c0 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.0004827 10.45426354
0xfafec8ced799a6d82212d61225e0659c1d39cc56e23feeff46fd2f37ecd96756Set Approval For...153036622022-08-08 20:16:2811 hrs 32 mins ago0x13edb8f3b8647f36a4d79fc3b8b30f6b03929341 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.0010504 22.74925996
0x617cf0b3e2871e51cc16628202a2d54c435caea879f34fd82a03592b27c80ccaGiveaway153035242022-08-08 19:44:2712 hrs 4 mins ago0xa593c8f83f8ddaa378fb9450b9dd29413069e420 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00150484 17.72154833
0x7c60d5b0f0aabfda83fd253c31a00c53923ade08897b19f628cff7fa1ca8057fGiveaway153031032022-08-08 18:16:4313 hrs 32 mins ago0xa593c8f83f8ddaa378fb9450b9dd29413069e420 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00191792 22.58611035
0x75888e526a628f0bdec7d54bb218e76a28372e3443720b80a5f9359ebb063af9Set Approval For...153017832022-08-08 13:18:5218 hrs 30 mins ago0x093981327fce2a439f99ce0549f2314c1ef18ad1 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00080397 17.38057534
0x9f03dc908e03d4a36ae927029e488c90de6423480f635839af4f99105ed709a3Set Approval For...153017482022-08-08 13:10:1918 hrs 38 mins ago0x746003e7f4f76b74e7fec7caf623716a0f12e4eb IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00058361 12.63977864
0x4e1505dea700f576f9cf090d567f2550c7b8510378089663019b33b54fe870acSet Approval For...153001782022-08-08 7:20:001 day 29 mins agoENS Name 0xjava.eth IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00066062 14.30770955
0x470f044f22778f64e787ea71d5ba5e4bf7bbf9378d11680e4e8259c531f12975Set Approval For...152979692022-08-07 22:49:141 day 8 hrs ago0x4d9c5ac872f53628c0be02b944438a0cd0010a2e IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00037576 8.13814093
0x6c5c03d19aa8992b4c445d936ce1e266a229de697c059df4103175920765e59cSet Approval For...152961852022-08-07 16:07:041 day 15 hrs agoENS Name randomlcda.eth IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.0003926 8.5028624
0x24486e5f5d7bb5e54eee8a84a596f20eaf6d223bd11c4d9e3d618d047a5e2089Set Approval For...152961852022-08-07 16:07:041 day 15 hrs agoENS Name randomlcda.eth IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00039331 8.5028624
0xeb0d5df7a8de363397a14fc824dce45b9ba291a480bd803cb06ddfc03703c7bfSet Approval For...152961832022-08-07 16:06:521 day 15 hrs agoENS Name randomlcda.eth IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.0004487 9.70020713
0x06075eb7f65a8a8b0338bda63443ee4128637fbc7ebead68338af1390583b2f8Set Approval For...152961812022-08-07 16:06:351 day 15 hrs ago0xdb65b6af6ffe4d606e28a8875b3991489183b941 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00052338 11.33526813
0xaa3f341397a391806e1b4f8b71967c8889ea7ca0a9c3d3c59f3072d0e9451bbbSet Approval For...152958272022-08-07 14:56:041 day 16 hrs agoENS Name giamdoxlong.eth IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00039037 8.45471654
0x9c9f2f1d4ba830c815d0631cdfdcab38f4dc401b7772a85a4b477de0b98e86e4Set Approval For...152910002022-08-06 20:48:562 days 11 hrs agoENS Name spinkhouse.eth IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00031107 6.72502505
0x98af6181a59858a5e933d7b130579b4f74961d785547136b0b63191ef8cf3c01Set Approval For...152901912022-08-06 17:58:092 days 13 hrs agoENS Name pooemoji.eth IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00048319 10.46486691
0x16f59ef9ac499a049f6056de2fd5188eaef53e5f47d0610013254fee6ebbaf32Transfer From152893162022-08-06 14:39:572 days 17 hrs ago0x4a15bb8094371b9ec6c25c995171fd8bf0c8cd48 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00057697 10
0x530a2b6c926d1b8760e1c4d83efa3aecf1f77e1de4c88b3f31bcc18176bc1344Set Approval For...152883352022-08-06 11:06:422 days 20 hrs ago0x0aadeef83545196ccb2ce70fabf8be1afa3c9b87 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00031515 6.82550255
0xc3eb1f57c6b2925922f735e3c00c99692a9b771d9af9e5c4d6d91364384cfd62Set Approval For...152872002022-08-06 6:43:443 days 1 hr ago0x0e73523152905041a7cf02d387f6a4b30405ff44 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.000126595.2
0x0f3d7c8fac0c838648db18944a041514bd4108ffb7148b5fd52594bfb064addcSet Approval For...152806192022-08-05 6:12:594 days 1 hr ago0xbced3a7802e5949d4b6838c87eb870dea647bc7f IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00072118 15.61925464
0xfe4fac93e2f3588e38744dbd9add6ee48408d29b2051c737a6d7ff3c05283029Set Approval For...152802042022-08-05 4:36:464 days 3 hrs ago0xd8ac384f3b9da4bf425ab66ef20a13356056cc93 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.0004808 10.41314924
0xb496e9fb4d94fdaa72f11225cf65ce5f78709299aee7bc11353a37015c2f895aSet Approval For...152797832022-08-05 3:01:264 days 4 hrs ago0x31148a58434d8214c150e8a38b299240c05ce444 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00041427 8.97217208
0xe0a86332f0be9831d27b37838fb39f01b62ee712adc0cf54b79690388c630afbSet Approval For...152796112022-08-05 2:24:034 days 5 hrs ago0x6c4c3ad5aef4384d4440f5315434f55a2d6c79e1 IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00050305 10.89503188
0x3405b218ad7013c1eed3dde6283759344927af3f4a50fdaa43f898f3f1985284Set Approval For...152782102022-08-04 21:14:584 days 10 hrs agoENS Name benbuddeh.eth IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00043315 9.38103981
0x548b7a5de38d971ee88c69818cc887cec4d9418847b774487790089e06df17d1Set Approval For...152780892022-08-04 20:46:474 days 11 hrs ago0x9f962324ef9d7ec929c96db33d2be6a17900229f IN  0x7127206a49824d693932f9edcb77c53fbb8443d70 Ether0.00090879 19.68228946
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0x05db383143342b20110efcaf439dc535aaab368d23b177600b29d7a95ac82ab6145028802022-04-01 21:47:17129 days 10 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d7 0x48d121fe7df73eba29060750cc8bbaaad15cc365583.58975 Ether
0xe8852826cf7e7f6c9d47d9436039b900f3e3e9f9ce75a1fc46fca22039f7e124142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00175 Ether
0x2f147341bcc1e0e1188d4dd070ec293841399a5830723b2b1ab279d854f394b7142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00525 Ether
0x7ad56618ed795e0e4fe4521fdfd5d21f38a0f11338f7b18fc4ac8e0c6a59c3ba142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00525 Ether
0xa36e7f3f03403c919f978eb492d9f44bc928c023bfb4d5e48b7426e83d67e336142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00175 Ether
0x4eb1f07a239799d94f39a3a7e2c710727f85a832bf66882c0889072c86f22423142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.0035 Ether
0xec59572660e98539d241f5dbe7ac1e1851917f30da5e49999e61f42d4c088ef8142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00525 Ether
0xaca7c4f248b007138abe28a47651c5ffd61d383833ba6044a4b6269dd87197ab142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00175 Ether
0x3c6d365c6706aceb0b6c21c86767a15af94f3f9af75302bbf7d7ee0d96dc21bd142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00175 Ether
0x69af9760e87b4fb6269430a4977ef353f2628a9604759a6e3fbc6c34e551492b142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00175 Ether
0x9e61f0a54b6e8da9146e4c5f743eac8e0e524431a884ceebe021f2f6fc7c7fc5142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00525 Ether
0x075d7afbfca7097b63d49d81ca9f357a84e284cdb4d657da6158acc2e53127b1142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00875 Ether
0xf8dc5eea57bc0e25e3f1381c6e69b79a891ca8b3db6252d52417775eadeeee7e142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.0035 Ether
0x9810530a7ecfe7691b3b0425b6f207060436f2c2f7a6e62c6a09ebf7729bc5ba142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00175 Ether
0xa5373e92d26ae80bb222125287f55b7c65b67f25afec573f1a52037b04f055e7142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00525 Ether
0xc38d57e76d2877e7ac2bf173a01c7f5cabe11036ca328f598cc67a81965ab01c142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00175 Ether
0x9854392f9e5cf97b86c8af1b713f1a600e5450f129ace584da90504743db6f45142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00175 Ether
0xb41fa3bcd3b2c8a4e5326e8d726c5b5f189c423f8c66f0d150c83fab25d376a8142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00175 Ether
0xb712d55b34390ef9d86803b89b69fde43cdf9d01bdd75aefd2985f8c2b43fbc1142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00525 Ether
0x9e553020fbd8bf57338280727707bbcd1368f244f69fe8b3d910968a558a6871142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.0175 Ether
0x5fbb637a76e9591e8fb6abbc8dc72d00f0fef0d3e6ff07f08f3c4dd8d315c551142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.0175 Ether
0xf29928454477cdecc64ee5b9e6dbe2289bcaf5bb0607d1cc0ba435bf92b248c1142875742022-02-27 10:06:28162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.0175 Ether
0x38a25f86d3cc9ed94dfabc4afb4e8ac1c87e3f119850db23e87c3d01c7770820142875732022-02-27 10:05:59162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.00525 Ether
0x8b1e4338e61244e774bd000bf600d753239665b42a4f292f7368a7f36614f25a142875732022-02-27 10:05:59162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.014 Ether
0xae3a7f83a550565d5a0fd8ddd7bbe3b60f1a0a194a2a35e968cbbacca3ae3d37142875732022-02-27 10:05:59162 days 21 hrs ago 0x7127206a49824d693932f9edcb77c53fbb8443d70xca451e4ea3fc0920ffc2cb2819a175168b8c36810.0035 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
CryptoTechWomen

Compiler Version
v0.8.11+commit.d7f03943

Optimization Enabled:
Yes with 100 runs

Other Settings:
default evmVersion
File 1 of 15 : CryptoTechWomen.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.8.11;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/utils/math/Math.sol";

contract CryptoTechWomen is ERC721, Ownable, ReentrancyGuard, Pausable {

    using Math for uint256;

    mapping(address => uint8) public preSaleMinted; // Amounts of minted tokens by users on the presale

    uint256 public publicSaleDate;  // Timestamp of public sale start date
    uint16 public totalSupply;  // Current amount of minted tokens
    uint16 public mintCounter;  // The next token ID to be minted (not equal to totalSupply because of the give away)
    uint16 public bpsToDonationFund;    // The number of BPs to be send to the Donation Fund after the milestone reached
    uint16 public airdropCounter; // Current amount of airdropped tokens
    address public donationFundAddress; // The Donation Fund address
    address public communityFundAddress;    // The Community Fund address
    string public baseURI;  // Base URI for tokens
    string public contractURI;  // Contract URI

    bool public uriSet; // If base URI set or not


    uint256 constant public publicSalePrice = 0.07 ether;   // Token price at the public sale stage
    uint256 constant public preSalePrice = 0.06 ether;  // Token price at the pre sale stage
    uint16 public maxTotalSupply = 8888;   // Max amount of tokens available for mint in total
    uint16 constant public preSaleTokenLimit = 7000;    // Max amount of tokens available for mint at the pre sale
    uint8 constant public preSaleLimitPerUser = 2;  // Max amount of tokens available for mint at the pre sale per address
    uint8 public amountForGiveAway = 150;  // Amount of tokens reserved for give away
    uint8 constant public publicSaleLimitPerTx = 10;    // Max amount of tokens available for mint at the public sale per transaction

    uint16 constant private BPS_BASE = 10000;   // Max amount of base points (1/10000)

    bytes32 public merkleRoot;    // Merkle root for the whitelist

    Milestone[] public milestones;  // Milestones of the sale

    struct Milestone {
        uint16 triggerId;   // ID when the milestone is triggered
        bool eventEmitted;  // If event was emmited or not
    }

    event PreSaleMint(address user, uint256 amount);
    event PublicSaleMint(address user, uint256 amount);
    event SoldOut();
    event MilestoneReached(uint256 triggerId);
    event GiveAway(address[] addresses);
    
    /*
    * @param _name The name of the NFT
    * @param _symbol The symbol of the NFT
    * @param _contractURI The contract URI
    * @param _merkleRoot Merkle root for the whitelist
    * @param _publicSaleDate Timestamp of the public sale stage date
    * @param _donationFundAddress The Donation Fund address
    * @param _communityFundAddress The Community Fund address
    * @param _bpsToDonationFund Amount of BPs for the Donation Fund
    * @param _triggerIds Trigger IDs for milestones
    */
    constructor (
        string memory _name, 
        string memory _symbol, 
        string memory _contractURI,
        bytes32 _merkleRoot,
        uint256 _publicSaleDate,
        address _donationFundAddress,
        address _communityFundAddress,
        uint16 _bpsToDonationFund,
        uint16[] memory _triggerIds,
        string memory _prerevealUri
    ) 
        ERC721(_name, _symbol) 
    {
        require(_publicSaleDate > 0, "invalid publicSaleDate");
        require(uint256(_merkleRoot) > 0, "invalid MerkleRoot");
        require(_donationFundAddress != address(0), "donationFundAddress is 0");
        require(_communityFundAddress != address(0), "communityFundAddress is 0");
        require(_bpsToDonationFund <= BPS_BASE, "invalid bpsToDonationFund");
        merkleRoot = _merkleRoot;
        publicSaleDate = _publicSaleDate;
        donationFundAddress = _donationFundAddress;
        communityFundAddress = _communityFundAddress;
        bpsToDonationFund = _bpsToDonationFund;
        contractURI = _contractURI;
        for (uint256 i; i < _triggerIds.length; i++) {
            milestones.push(Milestone(_triggerIds[i], false));
        }
        baseURI = _prerevealUri;
    }

    /*
    * @notice Distrubites specified amounts of ETH to the Donation Fund and the Community Fund
    * @dev Only owner can call it
    * @param _amountToDonationFund Amount of ETH for the Donation Fund
    * @param _amountToCommunityFund Amount of ETH for the Community Fund
    */
    function distributeFunds(uint256 _amountToDonationFund, uint256 _amountToCommunityFund) external onlyOwner {
        uint256 balance = address(this).balance;
        require(_amountToDonationFund + _amountToCommunityFund <= balance, "not enough balance");
        _sendETH(payable(donationFundAddress), _amountToDonationFund);
        _sendETH(payable(communityFundAddress), _amountToCommunityFund);
    }

    /*
    * @notice Sets amount of BPs for the Donation Fund
    * @dev Only owner can call it
    * @param _bpsToDonationFund Amount of BPs
    */
    function setBpsToDonationFund(uint16 _bpsToDonationFund) external onlyOwner {
        require(_bpsToDonationFund <= BPS_BASE, "incorrect bpsToDonationFund");
        bpsToDonationFund = _bpsToDonationFund;
    }

    /*
    * @notice Sets Merkle root
    * @dev Only owner can call it
    * @param _newRoot New Merkle root
    */
    function setMerkleRoot(bytes32 _newRoot) external onlyOwner {
        merkleRoot = _newRoot;
    }

    /*
    * @notice Sets the Donation Fund Address
    * @dev Only owner can call it
    * @param _donationFundAddress The new address of the Donation Fund
    */
    function setDonationFundAddress(address _donationFundAddress) external onlyOwner {
        require(_donationFundAddress != address(0), "donationFundAddress is 0");
        donationFundAddress = _donationFundAddress;
    }

    /*
    * @notice Sets the Community Fund Address
    * @dev Only owner can call it
    * @param _communityFundAddress The new address of the Commmunity Fund
    */
    function setCommunityFundAddress(address _communityFundAddress) external onlyOwner {
        require(_communityFundAddress != address(0), "communityFundAddress is 0");
        communityFundAddress = _communityFundAddress;
    }

    /*
    * @notice Sets the timestamp of the public sale start date
    * @dev Only owner can call it
    * @param _publicSaleDate Timestamp of the public sale start date
    */
    function setPublicSaleDate(uint256 _publicSaleDate) external onlyOwner {
        require(_publicSaleDate > 0, "incorrect publicSaleDate");
        publicSaleDate = _publicSaleDate;
    }

    /*
    * @notice Pauses contract
    * @dev Only owner can call it
    */
    function pause() external onlyOwner whenNotPaused {
        _pause();
    }

    /*
    * @notice Unpauses contract
    * @dev Only owner can call it
    */
    function unpause() external onlyOwner whenPaused {
        _unpause();
    }

    /*
    * @notice Mints specified amount of tokens on the pre sale and registrates 
    * the user if correct MerkleProof was submitted. Must be called if the 
    * user isn't registered yet (didn't mint tokens)
    * @dev Non reentrant
    * @param _amount Amount of tokens to mint
    * @param _proof Merkle proof for the user
    */
    function preSaleMint(
        uint256 _amount, 
        bytes32[] memory _proof
    ) 
        external 
        payable 
        nonReentrant
        whenNotPaused
    {
        require(preSaleMinted[_msgSender()] == 0, "already registered");
        require(_verify(_leaf(_msgSender()), _proof), "incorrect proof");
        _preSaleMint(_amount);
    }

    /*
    * @notice Mints specified amount of tokens on the pre sale. Must be called 
    * if the user already registered (already did mint tokens)
    * @dev Non reentrant
    * @param _amount Amount of tokens to mint
    */
    function preSaleMint(uint256 _amount) external payable nonReentrant whenNotPaused {
        require(preSaleMinted[_msgSender()] > 0, "not registered");
        _preSaleMint(_amount);
    }

    /*
    * @notice Mints specified amount of tokens on the public sale
    * @dev Non reentrant. Emits PublicSaleMint event
    * @param _amount Amount of tokens to mint
    */
    function publicSaleMint(uint256 _amount) external payable nonReentrant whenNotPaused {
        require(block.timestamp >= publicSaleDate, "public sale isn't started");
        require(_amount > 0 && _amount <= publicSaleLimitPerTx, "invalid amount");
        uint256 maxTotalSupply_ = maxTotalSupply;
        uint256 totalSupply_ = totalSupply;
        require(totalSupply_ + _amount <= maxTotalSupply_, "already sold out");
        require(mintCounter + _amount <= maxTotalSupply_ - amountForGiveAway, "the rest is reserved");
        _buyAndRefund(totalSupply_, _amount, publicSalePrice);
        if (totalSupply_ + _amount == maxTotalSupply_) emit SoldOut();
        emit PublicSaleMint(_msgSender(), _amount);
    }

    /*
    * @notice Mints specified IDs to specified addresses
    * @dev Only owner can call it. Lengths of arrays must be equal. 
    * @param _accounts The list of addresses to mint tokens to
    */
    function giveaway(address[] memory _accounts) external onlyOwner {
        uint256 maxTotSup = maxTotalSupply;
        uint256 currentTotalSupply = totalSupply;
        require(airdropCounter + _accounts.length <= amountForGiveAway, "limit for airdrop exceeded");
        require(currentTotalSupply + _accounts.length <= maxTotSup, "maxTotalSupply exceeded");
        uint256 counter = currentTotalSupply;
        for (uint256 i; i < _accounts.length; i++) {
            _safeMint(_accounts[i], counter);
            counter++;
        }
        airdropCounter += uint16(_accounts.length);
        totalSupply += uint16(_accounts.length);
        if (currentTotalSupply + _accounts.length == maxTotSup) emit SoldOut();  // emit SoldOut in case some tokens were airdropped after the sale
        emit GiveAway(_accounts);
    }

    /*
    * @notice Sets base URI for tokens
    * @dev Only owner can call it
    * @param _newBaseURI The new base URI
    */
    function setBaseURI(string memory _newBaseURI) external onlyOwner {
        baseURI = _newBaseURI;
        uriSet = true;
    }

    /*
    * @notice Withdraws specified amount of ETH to specified address
    * @dev Only owner can call it
    * @param _to The address of ETH receiver
    * @param _amount The amount of ETH to withdraw
    */
    function withdrawTo(address payable _to, uint256 _amount) external onlyOwner {
        uint256 balance = address(this).balance;
        require(balance >= _amount, "unsufficient balance");
        _sendETH(_to, _amount);
    }

    /*
    * @dev The main logic for the pre sale mint. Emits PreSaleMint event
    * @param _amount The amount of tokens 
    */
    function _preSaleMint(uint256 _amount) private {
        require(block.timestamp < publicSaleDate, "presale stage finished");
        require(_amount > 0, "invalid amount");
        require(preSaleMinted[_msgSender()] + _amount <= preSaleLimitPerUser, "limit per user exceeded");
        uint256 totalSupply_ = totalSupply;
        require(totalSupply_ + _amount <= preSaleTokenLimit, "presale token limit exceeded");
        _buyAndRefund(totalSupply_, _amount, preSalePrice);
        preSaleMinted[_msgSender()] += uint8(_amount);
        emit PreSaleMint(_msgSender(), _amount);
    }

    /*
    * @dev Mints tokens for the user and refunds ETH if too much was passed
    * @param _amount The amount of tokens 
    * @param _price The price for each token 
    */
    function _buyAndRefund(uint256 _totalSupply, uint256 _amount, uint256 _price) internal {
        uint256 totalCost = _amount * _price;
        require(msg.value >= totalCost, "not enough funds");
        for (uint256 i; i < _amount; i++) {
            _safeMint(_msgSender(), _totalSupply + i);
        }
        totalSupply += uint16(_amount);
        mintCounter += uint16(_amount);
        _checkMilestones(_totalSupply, _amount, _price);
        uint256 refund = msg.value - totalCost;
        if (refund > 0) {
            _sendETH(payable(_msgSender()), refund);
        }
    }

    /*
    * @dev Checks if a milestone was reached, do some logic if it was. 
    * Emits MilestoneReached event
    * @param _amount Amount of tokens to buy
    * @param _oldMintCounter The mint counter 
    * @param _price The current price of the stage 
    */
    function _checkMilestones(uint256 _oldMintCounter, uint256 _amount, uint256 _price) private {
        Milestone memory milestone = milestones[0];
        if (_oldMintCounter + _amount >= milestone.triggerId) {
            uint256 countAfterTrigger = Math.min(_oldMintCounter + _amount - milestone.triggerId, _amount);
            uint256 toPay = bpsToDonationFund * countAfterTrigger * _price / BPS_BASE;
            _sendETH(payable(donationFundAddress), toPay);
            if (!milestone.eventEmitted) {
                emit MilestoneReached(milestone.triggerId);
                milestones[0].eventEmitted = true;
            }
        } 
        milestone = milestones[1];
        if (
            !milestone.eventEmitted &&
            _oldMintCounter + _amount >= milestone.triggerId
        ) {
            emit MilestoneReached(milestone.triggerId);
            milestones[1].eventEmitted = true;
        }
    }

    /*
    * @dev sends ETH to the specified address
    * @param _to The receiver
    * @param _amount The amount of ETH to send 
    */
    function _sendETH(address payable _to, uint256 _amount) internal {
        (bool success, ) = _to.call{value: _amount}("");
        require(success, "send ETH failed");
    }

    /*
    * @dev Returns the base URI
    */
    function _baseURI() internal view virtual override returns (string memory) {
        return baseURI;
    }

    function tokenURI(uint256 tokenId) public view override returns (string memory) {
        if (!uriSet) return _baseURI();
        return ERC721.tokenURI(tokenId);
    }

    function setUriSet(bool status) external {
        uriSet = status;
    }


    /*
    * @dev Returns the leaf for Merkle tree
    * @param _account Address of the user
    * @param _userId ID of the user
    */
    function _leaf(address _account)
    internal pure returns (bytes32)
    {
        return keccak256(abi.encodePacked(_account));
    }

    /*
    * @dev Verifies if the proof is valid or not
    * @param _leaf The leaf for the user
    * @param _proof Proof for the user
    */
    function _verify(bytes32 _leaf, bytes32[] memory _proof)
    internal view returns (bool)
    {
        return MerkleProof.verify(_proof, merkleRoot, _leaf);
    }

    /*
    * @dev receive() function to let the contract accept ETH
    */
    receive() external payable{}

}

File 2 of 15 : ERC721.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Base URI for computing {tokenURI}. 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 3 of 15 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _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 15 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

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

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

        _;

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

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

pragma solidity ^0.8.0;

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

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        require(!paused(), "Pausable: paused");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        require(paused(), "Pausable: not paused");
        _;
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

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

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) {
        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 = keccak256(abi.encodePacked(computedHash, proofElement));
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
            }
        }

        // Check if the computed hash (root) is equal to the provided root
        return computedHash == root;
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a / b + (a % b == 0 ? 0 : 1);
    }
}

File 8 of 15 : IERC721.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

File 9 of 15 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

File 10 of 15 : IERC721Metadata.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC721.sol";

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

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

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

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

pragma solidity ^0.8.0;

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

        uint256 size;
        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 12 of 15 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

File 13 of 15 : 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 14 of 15 : ERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

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

pragma solidity ^0.8.0;

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

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 100
  },
  "metadata": {
    "bytecodeHash": "none",
    "useLiteralContent": true
  },
  "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] : _name (string): Crypto Tech Women
Arg [1] : _symbol (string): CTW
Arg [2] : _contractURI (string): https://gateway.pinata.cloud/ipfs/QmaJFjxzJnSbjCpf7f1RFjiShs5SkBHm7FHcudyjYWQK7L
Arg [3] : _merkleRoot (bytes32): 0xe0e911ecfd89889db13808bd914de3605b92d063234b13f1352c47c8b1ef79b0
Arg [4] : _publicSaleDate (uint256): 1645894800
Arg [5] : _donationFundAddress (address): 0xca451e4ea3fc0920ffc2cb2819a175168b8c3681
Arg [6] : _communityFundAddress (address): 0x6d3e69349072565f81ac838e9b6dd251b4625275
Arg [7] : _bpsToDonationFund (uint16): 250
Arg [8] : _triggerIds (uint16[]): 3556,8000
Arg [9] : _prerevealUri (string): ipfs://QmPBoX919RxRmDf2gCAKzEyNh11YviZYBifXvuASCkDQCZ

-----Encoded View---------------
24 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000140
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000180
Arg [2] : 00000000000000000000000000000000000000000000000000000000000001c0
Arg [3] : e0e911ecfd89889db13808bd914de3605b92d063234b13f1352c47c8b1ef79b0
Arg [4] : 00000000000000000000000000000000000000000000000000000000621a5c90
Arg [5] : 000000000000000000000000ca451e4ea3fc0920ffc2cb2819a175168b8c3681
Arg [6] : 0000000000000000000000006d3e69349072565f81ac838e9b6dd251b4625275
Arg [7] : 00000000000000000000000000000000000000000000000000000000000000fa
Arg [8] : 0000000000000000000000000000000000000000000000000000000000000240
Arg [9] : 00000000000000000000000000000000000000000000000000000000000002a0
Arg [10] : 0000000000000000000000000000000000000000000000000000000000000011
Arg [11] : 43727970746f205465636820576f6d656e000000000000000000000000000000
Arg [12] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [13] : 4354570000000000000000000000000000000000000000000000000000000000
Arg [14] : 0000000000000000000000000000000000000000000000000000000000000050
Arg [15] : 68747470733a2f2f676174657761792e70696e6174612e636c6f75642f697066
Arg [16] : 732f516d614a466a787a4a6e53626a43706637663152466a6953687335536b42
Arg [17] : 486d374648637564796a5957514b374c00000000000000000000000000000000
Arg [18] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [19] : 0000000000000000000000000000000000000000000000000000000000000de4
Arg [20] : 0000000000000000000000000000000000000000000000000000000000001f40
Arg [21] : 0000000000000000000000000000000000000000000000000000000000000035
Arg [22] : 697066733a2f2f516d50426f583931395278526d4466326743414b7a45794e68
Arg [23] : 31315976695a594269665876754153436b4451435a0000000000000000000000


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.