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Contract

0xF137a650502D53EB774F6B3A366977Ea4c8d6A2f
 

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To
Unstake NFT209612792024-10-14 3:58:4763 days ago1728878327IN
0xF137a650...a4c8d6A2f
0 ETH0.0028404913.94764759
Unstake NFT207532642024-09-15 3:15:5992 days ago1726370159IN
0xF137a650...a4c8d6A2f
0 ETH0.00040732
Unstake NFT207532382024-09-15 3:10:4792 days ago1726369847IN
0xF137a650...a4c8d6A2f
0 ETH0.00040732
Unstake NFT205499142024-08-17 17:44:47121 days ago1723916687IN
0xF137a650...a4c8d6A2f
0 ETH0.000055181.8713706
Unstake NFT205499072024-08-17 17:43:11121 days ago1723916591IN
0xF137a650...a4c8d6A2f
0 ETH0.00035221.8405867
Unstake NFT204083552024-07-28 23:31:23140 days ago1722209483IN
0xF137a650...a4c8d6A2f
0 ETH0.000311151.62609262
Unstake NFT202461722024-07-06 8:07:11163 days ago1720253231IN
0xF137a650...a4c8d6A2f
0 ETH0.000488772.40003562
Unstake NFT191540122024-02-04 9:19:35316 days ago1707038375IN
0xF137a650...a4c8d6A2f
0 ETH0.0004813816.32375349
Unstake NFT191539612024-02-04 9:09:23316 days ago1707037763IN
0xF137a650...a4c8d6A2f
0 ETH0.0037273418.30233784
Unstake NFT190588792024-01-22 0:59:59329 days ago1705885199IN
0xF137a650...a4c8d6A2f
0 ETH0.0026835313.17692928
Unstake NFT190263532024-01-17 11:36:47334 days ago1705491407IN
0xF137a650...a4c8d6A2f
0 ETH0.0066415632.61199581
Unstake NFT188741162023-12-27 2:45:47355 days ago1703645147IN
0xF137a650...a4c8d6A2f
0 ETH0.0026949615.05111985
Unstake NFT188741122023-12-27 2:44:47355 days ago1703645087IN
0xF137a650...a4c8d6A2f
0 ETH0.0027383515.29347972
Unstake NFT188741092023-12-27 2:44:11355 days ago1703645051IN
0xF137a650...a4c8d6A2f
0 ETH0.0027678915.45841367
Unstake NFT188741042023-12-27 2:43:11355 days ago1703644991IN
0xF137a650...a4c8d6A2f
0 ETH0.0027142515.15885104
Unstake NFT188740992023-12-27 2:42:11355 days ago1703644931IN
0xF137a650...a4c8d6A2f
0 ETH0.0029072416.23668631
Unstake NFT188740852023-12-27 2:39:23355 days ago1703644763IN
0xF137a650...a4c8d6A2f
0 ETH0.002711415.14297096
Unstake NFT188740812023-12-27 2:38:35355 days ago1703644715IN
0xF137a650...a4c8d6A2f
0 ETH0.0025995614.51832556
Unstake NFT188740782023-12-27 2:37:59355 days ago1703644679IN
0xF137a650...a4c8d6A2f
0 ETH0.002818715.74222328
Unstake NFT188740752023-12-27 2:37:23355 days ago1703644643IN
0xF137a650...a4c8d6A2f
0 ETH0.0028701316.02945763
Unstake NFT188740552023-12-27 2:33:23355 days ago1703644403IN
0xF137a650...a4c8d6A2f
0 ETH0.0026235113.71029096
Unstake NFT187192572023-12-05 9:28:59377 days ago1701768539IN
0xF137a650...a4c8d6A2f
0 ETH0.0084783641.63121311
Unstake NFT185051512023-11-05 10:15:59407 days ago1699179359IN
0xF137a650...a4c8d6A2f
0 ETH0.0023580513.16951723
Unstake NFT185051312023-11-05 10:11:59407 days ago1699179119IN
0xF137a650...a4c8d6A2f
0 ETH0.0023632213.19838376
Unstake NFT185029892023-11-05 2:59:23407 days ago1699153163IN
0xF137a650...a4c8d6A2f
0 ETH0.0019695911
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145231192022-04-05 1:57:54986 days ago1649123874
0xF137a650...a4c8d6A2f
1.6 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
Bank

Compiler Version
v0.8.4+commit.c7e474f2

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 19 : Bank.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "./Pausable.sol";
import "./Billionaire.sol";
import "./Cyborg.sol";

contract Bank is IERC721Receiver, Pausable {
    struct Token {
        uint256 nft_party;
        uint256 nft_cybork;
        uint256 staking_time;
    }
    uint256 public totalPoints;
    uint256 public totalPartyApe;
    uint256 public totalCyborg;
    uint256 public totalReward;

    address payable addressParty;
    address public addressCybork;

    mapping(uint256 => uint256) public indexTokenParty;
    mapping(uint256 => uint256) public idTokenCybork;
    mapping(uint256 => address) public userTokenParty;
    mapping(address => uint256) public userReward;
    mapping(address => uint256) public userPoints;
    mapping(address => bool) public isUser;
    mapping(address => Token[]) public stakedToken;

    address[] public users;

    Billionaire partyContract;
    Cyborg cyborkContract;

    constructor(address payable _addressParty, address _addressCybork) {
        require(
            _addressParty != address(0),
            "Bank Billionaire Club:  party contract address is Zero address"
        );
        require(
            _addressCybork != address(0),
            "Bank Billionaire Club:  cybork contract address is Zero address"
        );

        addressParty = payable(_addressParty);
        partyContract = Billionaire(addressParty);
        addressCybork = _addressCybork;
        cyborkContract = Cyborg(addressCybork);
    }

    function getNFT(address _user) public view returns (Token[] memory) {
        return stakedToken[_user];
    }

    function stakeNFT(uint256 _tokenParty, uint256 _tokenCybork)
        external
        whenNotPaused
    {
        require(
            (partyContract.ownerOf(_tokenParty) == msg.sender),
            "Billionaire Club: Caller is not the owner of the Party Ape token"
        );
        require(
            (cyborkContract.ownerOf(_tokenCybork) == msg.sender),
            "Cyborgs Billionaire Club: Caller is not the owner of the Cybork token"
        );
        require(
            (cyborkContract.isTokenMerged(_tokenParty) == true),
            "Cyborgs Billionaire Club: Party Ape token is not merged "
        );

        stakedToken[msg.sender].push(
            Token(_tokenParty, _tokenCybork, block.timestamp)
        );
        indexTokenParty[_tokenParty] = stakedToken[msg.sender].length -1;
        idTokenCybork[_tokenParty] = _tokenCybork;
        userTokenParty[_tokenParty] = msg.sender;
        totalPartyApe = totalPartyApe + 1;
        totalCyborg = totalCyborg + 1;

        partyContract.safeTransferFrom(msg.sender, address(this), _tokenParty);
        cyborkContract.safeTransferFrom(
            msg.sender,
            address(this),
            _tokenCybork
        );
        if (isUser[msg.sender] == false) {
            users.push(msg.sender);
            isUser[msg.sender] = true;
        }
    }

    function calculatePoints() external onlyOwner {
        require(totalPoints == 0, "total points is zero");
        address _user;
        for (uint256 i = 0; i < users.length; i++) {
            _user = users[i];
            require(
                _user != address(0),
                "Bank Billionaire Club:  user is Zero address"
            );
            require(
                userPoints[_user] == 0,
                "Bank Billionaire Club:  user points is not zero"
            );
            for (uint256 j = 0; j < stakedToken[_user].length; j++) {
                if (stakedToken[_user][j].staking_time == 0) {
                    continue;
                }
                userPoints[_user] =
                    userPoints[_user] +
                    (block.timestamp - stakedToken[_user][j].staking_time);
            }
            totalPoints = totalPoints + userPoints[_user];
        }
    }

    function calculateRewards() external onlyOwner {
        require(
            address(this).balance > 0,
            "Bank Billionaire Club:  contract balance is Zero"
        );
        address _user;
        for (uint256 i = 0; i < users.length; i++) {
            _user = users[i];
            userReward[_user] =
                userReward[_user] +
                (address(this).balance * userPoints[_user]) /
                totalPoints;
            userPoints[_user] = 0;
            totalReward = totalReward + userReward[_user];
        }
        totalPoints = 0;
    }

    function claimRewards(uint256 _amount) external {
        require(
            msg.sender != address(0),
            "Bank Billionaire Club: caller is Zero address"
        );
        require(_amount > 0, "Bank Billionaire Club: _amount is zero");
        require(
            _amount <= userReward[msg.sender],
            "Bank Billionaire Club: _amount excedes the user rewards"
        );
        userReward[msg.sender] = userReward[msg.sender] - _amount;
        totalReward = totalReward - _amount;

        payable(msg.sender).transfer(_amount);
    }

    function unstakeNFT(uint256 _tokenParty) external {
        require(
            partyContract.ownerOf(_tokenParty) == address(this),
            "Bank Billionaire Club: nft is not staked"
        );
        address _user = userTokenParty[_tokenParty];
        require(
            _user == msg.sender,
            "Bank Billionaire Club: caller is not the owner"
        );
        totalPartyApe = totalPartyApe - 1;
        totalCyborg = totalCyborg - 1;
        partyContract.safeTransferFrom(address(this), msg.sender, _tokenParty);
        cyborkContract.safeTransferFrom(
            address(this),
            msg.sender,
            idTokenCybork[_tokenParty]
        );
          uint256 _index = indexTokenParty[_tokenParty];
          stakedToken[msg.sender][_index].nft_party = 0;
          stakedToken[msg.sender][_index].nft_cybork = 0;
          stakedToken[msg.sender][_index].staking_time = 0;
    }

    function receiveEher() external payable {}

    function withdraw(uint256 _amount) external onlyOwner {
        require(_amount > 0, "Bank Billionaire Club: amount is zero");
        require(
            address(this).balance >= _amount,
            "Bank Billionaire Club: insufficient contract balance"
        );
        payable(msg.sender).transfer(_amount);
    }

    function onERC721Received(
        address,
        address,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC721Received.selector;
    }
}

File 2 of 19 : 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 3 of 19 : Pausable.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

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

/**
 * @title Pausable
 * @dev Base contract which allows children to implement an emergency stop mechanism.
 */
contract Pausable is Ownable {
    event Pause();
    event Unpause();

    bool public paused = false;

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     */
    modifier whenNotPaused() {
        require(!paused, "Transaction is not available");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     */
    modifier whenPaused() {
        require(paused, "Transaction is available");
        _;
    }

    /**
     * @dev called by the owner to pause, triggers stopped state
     */
    function pause() public onlyOwner whenNotPaused {
        paused = true;
        emit Pause();
    }

    /**
     * @dev called by the owner to unpause, returns to normal state
     */
    function unpause() public onlyOwner whenPaused {
        paused = false;
        emit Unpause();
    }
}

File 4 of 19 : Billionaire.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/finance/PaymentSplitter.sol";
import "./Pausable.sol";

contract Billionaire is ERC721Enumerable, Pausable, PaymentSplitter {
    using Counters for Counters.Counter;

    struct PresaleConfig {
        uint256 startTime;
        uint256 duration;
        uint256 maxCount;
    }
    struct SaleConfig {
        uint256 startTime;
        uint256 maxCount;
    }
    uint256 public maxTotalSupply = 10333;
    uint256 public maxGiftSupply = 333;
    uint256 public giftCount;
    uint256 public presaleCount;
    uint256 public totalNFT;
    bool public isBurnEnabled;
    string public baseURI;
    PresaleConfig public presaleConfig;
    SaleConfig public saleConfig;
    Counters.Counter private _tokenIds;
    uint256[] private _teamShares = [25, 25, 25, 25];
    address[] private _team = [
        0x8dD47E819c53138aA18F8651D797e7969f34d1F1,
        0xF536390c3A0bAFF71289975e45e1f647fc8C7304,
        0xFD6Ed83d8e47B1C808efE984cEF965B2CB3393De,
        0x03bb7A8226301C1cC0e82BFf029989E22a76F597
    ];
    mapping(address => bool) private _presaleList;
    mapping(address => uint256) public _presaleClaimed;
    mapping(address => uint256) public _giftClaimed;
    mapping(address => uint256) public _saleClaimed;
    mapping(address => uint256) public _totalClaimed;

    enum WorkflowStatus {
        CheckOnPresale,
        Presale,
        Sale,
        SoldOut
    }
    WorkflowStatus public workflow;

    event ChangePresaleConfig(
        uint256 _startTime,
        uint256 _duration,
        uint256 _maxCount
    );
    event ChangeSaleConfig(uint256 _startTime, uint256 _maxCount);
    event ChangeIsBurnEnabled(bool _isBurnEnabled);
    event ChangeBaseURI(string _baseURI);
    event GiftMint(address indexed _recipient, uint256 _amount);
    event PresaleMint(address indexed _minter, uint256 _amount, uint256 _price);
    event SaleMint(address indexed _minter, uint256 _amount, uint256 _price);
    event WorkflowStatusChange(
        WorkflowStatus previousStatus,
        WorkflowStatus newStatus
    );

    constructor()
        ERC721("Billionaire Token", "BILlIONAIRE")
        PaymentSplitter(_team, _teamShares)
    {}

    function setBaseURI(string calldata _tokenBaseURI) external onlyOwner {
        baseURI = _tokenBaseURI;
        emit ChangeBaseURI(_tokenBaseURI);
    }

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

    function addToPresaleList(address[] calldata _addresses)
        external
        onlyOwner
    {
        for (uint256 ind = 0; ind < _addresses.length; ind++) {
            require(
                _addresses[ind] != address(0),
                "Billionaire: Can't add a zero address"
            );
            if (_presaleList[_addresses[ind]] == false) {
                _presaleList[_addresses[ind]] = true;
            }
        }
    }

    function isOnPresaleList(address _address) external view returns (bool) {
        return _presaleList[_address];
    }

    function removeFromPresaleList(address[] calldata _addresses)
        external
        onlyOwner
    {
        for (uint256 ind = 0; ind < _addresses.length; ind++) {
            require(
                _addresses[ind] != address(0),
                "Billionaire: Can't remove a zero address"
            );
            if (_presaleList[_addresses[ind]] == true) {
                _presaleList[_addresses[ind]] = false;
            }
        }
    }

    function setUpPresale(uint256 _duration) external onlyOwner {
        require(
            workflow == WorkflowStatus.CheckOnPresale,
            "Bilionaire: Unauthorized Transaction"
        );
        uint256 _startTime = block.timestamp;
        uint256 _maxCount = 2;
        presaleConfig = PresaleConfig(_startTime, _duration, _maxCount);
        emit ChangePresaleConfig(_startTime, _duration, _maxCount);
        workflow = WorkflowStatus.Presale;
        emit WorkflowStatusChange(
            WorkflowStatus.CheckOnPresale,
            WorkflowStatus.Presale
        );
    }

    function setUpSale() external onlyOwner {
        require(
            workflow == WorkflowStatus.Presale,
            "Bilionaire: Unauthorized Transaction"
        );
        PresaleConfig memory _presaleConfig = presaleConfig;
        uint256 _presaleEndTime = _presaleConfig.startTime +
            _presaleConfig.duration;
        require(
            block.timestamp > _presaleEndTime,
            "Bilionaire: Sale not started"
        );
        uint256 _startTime = block.timestamp;
        uint256 _maxCount = 10;
        saleConfig = SaleConfig(_startTime, _maxCount);
        emit ChangeSaleConfig(_startTime, _maxCount);
        workflow = WorkflowStatus.Sale;
        emit WorkflowStatusChange(WorkflowStatus.Presale, WorkflowStatus.Sale);
    }

    function getPrice() public view returns (uint256) {
        uint256 _price;
        PresaleConfig memory _presaleConfig = presaleConfig;
        SaleConfig memory _saleConfig = saleConfig;
        if (
            block.timestamp <=
            _presaleConfig.startTime + _presaleConfig.duration
        ) {
            _price = 1000; //0.1 ETH
        } else if (block.timestamp <= _saleConfig.startTime + 3 hours) {
            _price = 3000; //0.3 ETH
        } else if (
            (block.timestamp > _saleConfig.startTime + 3 hours) &&
            (block.timestamp <= _saleConfig.startTime + 6 hours)
        ) {
            _price = 2000; //0.2 ETH
        } else {
            _price = 100000; //0.1 ETH
        }
        return _price;
    }

    function setIsBurnEnabled(bool _isBurnEnabled) external onlyOwner {
        isBurnEnabled = _isBurnEnabled;
        emit ChangeIsBurnEnabled(_isBurnEnabled);
    }

    function giftMint(address[] calldata _addresses)
        external
        onlyOwner
        whenNotPaused
    {
        require(
            totalNFT + _addresses.length <= maxTotalSupply,
            "Billionaire: max total supply exceeded"
        );

        require(
            giftCount + _addresses.length <= maxGiftSupply,
            "Bilionaire: max gift supply exceeded"
        );

        uint256 _newItemId;
        for (uint256 ind = 0; ind < _addresses.length; ind++) {
            require(
                _addresses[ind] != address(0),
                "Bilionaire: recepient is the null address"
            );
            _tokenIds.increment();
            _newItemId = _tokenIds.current();
            _safeMint(_addresses[ind], _newItemId);
            _giftClaimed[_addresses[ind]] = _giftClaimed[_addresses[ind]] + 1;
            _totalClaimed[_addresses[ind]] = _totalClaimed[_addresses[ind]] + 1;
            totalNFT = totalNFT + 1;
            giftCount = giftCount + 1;
        }
    }

    function presaleMint(uint256 _amount) internal {
        PresaleConfig memory _presaleConfig = presaleConfig;
        require(
            _presaleConfig.startTime > 0,
            "Bilionaire: Presale must be active to mint Ape"
        );
        require(
            block.timestamp >= _presaleConfig.startTime,
            "Bilionaire: Presale not started"
        );
        require(
            block.timestamp <=
                _presaleConfig.startTime + _presaleConfig.duration,
            "Bilionaire: Presale is ended"
        );
        require(
            _presaleList[msg.sender] == true,
            " Caller is not on the presale list"
        );
        require(
            _presaleClaimed[msg.sender] + _amount <= _presaleConfig.maxCount,
            "Bilionaire: Can only mint 2 tokens"
        );
        require(
            totalNFT + _amount <= maxTotalSupply,
            "Bilionaire: max supply exceeded"
        );
        uint256 _price = getPrice();
        require(
            _price * _amount <= msg.value,
            "Bilionaire: Ether value sent is not correct"
        );
        uint256 _newItemId;
        for (uint256 ind = 0; ind < _amount; ind++) {
            _tokenIds.increment();
            _newItemId = _tokenIds.current();
            _safeMint(msg.sender, _newItemId);
            _presaleClaimed[msg.sender] = _presaleClaimed[msg.sender] + 1;
            _totalClaimed[msg.sender] = _totalClaimed[msg.sender] + 1;
            totalNFT = totalNFT + 1;
            presaleCount = presaleCount + 1;
        }
        emit PresaleMint(msg.sender, _amount, _price);
    }

    function saleMint(uint256 _amount) internal {
        SaleConfig memory _saleConfig = saleConfig;
        require(_amount > 0, "Bilionaire: zero amount");
        require(_saleConfig.startTime > 0, "Bilionaire: sale is not active");
        require(
            block.timestamp >= _saleConfig.startTime,
            "Bilionaire: sale not started"
        );
        require(
            _amount <= _saleConfig.maxCount,
            "Bilionaire:  Can only mint 10 tokens at a time"
        );
        require(
            totalNFT + _amount <= maxTotalSupply,
            "Bilionaire: max supply exceeded"
        );
        uint256 _price = getPrice();
        require(
            _price * _amount <= msg.value,
            "Bilionaire: Ether value sent is not correct"
        );
        uint256 _newItemId;
        for (uint256 ind = 0; ind < _amount; ind++) {
            _tokenIds.increment();
            _newItemId = _tokenIds.current();
            _safeMint(msg.sender, _newItemId);
            _saleClaimed[msg.sender] = _saleClaimed[msg.sender] + 1;
            _totalClaimed[msg.sender] = _totalClaimed[msg.sender] + 1;
            totalNFT = totalNFT + 1;
        }
        emit SaleMint(msg.sender, _amount, _price);
    }

    function mainMint(uint256 _amount) external payable whenNotPaused {
        require(
            block.timestamp > presaleConfig.startTime,
            "Bilionaire: presale not started"
        );
        if (
            block.timestamp <=
            (presaleConfig.startTime + presaleConfig.duration)
        ) {
            presaleMint(_amount);
        } else {
            saleMint(_amount);
        }
        if (totalNFT + _amount == maxTotalSupply) {
            workflow = WorkflowStatus.SoldOut;
            emit WorkflowStatusChange(
                WorkflowStatus.Sale,
                WorkflowStatus.SoldOut
            );
        }
    }

    function burn(uint256 tokenId) public {
        require(isBurnEnabled, "Bilionaire: burning disabled");
        require(
            _isApprovedOrOwner(msg.sender, tokenId),
            "Bilionaire: burn caller is not owner nor approved"
        );
        _burn(tokenId);
        totalNFT = totalNFT - 1;
    }

    function getWorkflowStatus() public view returns (uint256) {
        uint256 _status;
        if (workflow == WorkflowStatus.CheckOnPresale) {
            _status = 1;
        }
        if (workflow == WorkflowStatus.Presale) {
            _status = 2;
        }
        if (workflow == WorkflowStatus.Sale) {
            _status = 3;
        }
        if (workflow == WorkflowStatus.SoldOut) {
            _status = 4;
        }
        return _status;
    }
}

File 5 of 19 : Cyborg.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./Pausable.sol";
import "./Billionaire.sol";

contract Cyborg is IERC721Receiver, ERC721Enumerable, Pausable {
    struct Trait {
        uint8 index_1;
        uint8 index_2;
    }
    bool public isBurnEnabled;
    string public baseURI;
    address payable public billionaireAddress;
    address[] public users;
    mapping(uint256 => Trait) public traitsPerToken;
    mapping(uint256 => uint256) public tokens;
    mapping(uint256 => bool) public ismerged;
    Billionaire billionaireContract;

    event LogMint(address indexed _caller, uint256 _token_1, uint256 _token_2, uint256 _trait_1, uint256 _trait_2);
    event ChangeIsBurnEnabled(bool _isBurnEnabled);
    event ChangeBaseURI(string _baseURI);

    constructor(address payable _addresssContract) ERC721("Cyborg Billionaire Club ", "CBC") {
        require(
            _addresssContract != address(0),
            "Cyborg Billionaire Club: address contract is Zero address"
        );
        billionaireAddress = payable(_addresssContract);
        billionaireContract = Billionaire(billionaireAddress);
    }

    function getToken(uint256 _id) external view returns (uint256) {
        return tokens[_id];
    }

    function getTraits(uint256 _id) external view returns (Trait memory) {
        return traitsPerToken[_id];
    }

    function getusers(uint256 _id) external view returns (address) {
        return users[_id];
    }

    function setBaseURI(string calldata _tokenBaseURI) external onlyOwner {
        baseURI = _tokenBaseURI;
        emit ChangeBaseURI(_tokenBaseURI);
    }

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

    function setIsBurnEnabled(bool _isBurnEnabled) external onlyOwner {
        isBurnEnabled = _isBurnEnabled;
        emit ChangeIsBurnEnabled(_isBurnEnabled);
    }

    function isTokenMerged(uint256 _token)
        external
        view
        returns (bool)
    {
        return ismerged[_token];
    }

    function mergeNFT(
        uint256 _token_1,
        uint256 _token_2,
        uint8 _trait_1,
        uint8 _trait_2
    ) external whenNotPaused {
        address _caller = msg.sender;

        require((_trait_1 >=1) && (_trait_1 <=7),
            "Cyborg Billionaire Club: invalid trait index");

        require((_trait_2 >=1) && (_trait_2 <=7),
            "Cyborg Billionaire Club: invalid trait index");
        
        require(
            (billionaireContract.ownerOf(_token_1) == msg.sender) &&
                (billionaireContract.ownerOf(_token_2) == msg.sender),
            "Cyborg Billionaire Club: Caller is not the owner of tokens"
        );
        require(
            ismerged[_token_1] == false,
            "Cyborg Billionaire Club: Token is already merged"
        );

         require(
            billionaireContract.isApprovedForAll(_caller, address(this)),
            "Cyborg Billionaire Club: Cyborc contract is not approved for tokens");

        Trait memory _trait = Trait(_trait_1, _trait_2);
        traitsPerToken[_token_1] = _trait;
        tokens[_token_1] = _token_2;
        users.push(msg.sender);
        _safeMint(msg.sender, _token_1);
        ismerged[_token_1] = true;

        billionaireContract.safeTransferFrom(msg.sender, address(this), _token_2); 
        billionaireContract.burn(_token_2); 

        emit LogMint(msg.sender, _token_1, _token_2, _trait_1,  _trait_2);
    }

    function burn(uint256 _id) external {
        require(isBurnEnabled, "Cyborg Billionaire Club: burning disabled");
        require(
            _isApprovedOrOwner(msg.sender, _id),
            "Cyborg Billionaire Club: burn caller is not owner nor approved"
        );
        _burn(_id);
    }

    function onERC721Received(address, address, uint256, bytes memory) public virtual override returns (bytes4) {
        return this.onERC721Received.selector;
    }
}

File 6 of 19 : 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 7 of 19 : 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 8 of 19 : ERC721Enumerable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

File 9 of 19 : Counters.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

File 10 of 19 : PaymentSplitter.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../utils/Address.sol";
import "../utils/Context.sol";
import "../utils/math/SafeMath.sol";

/**
 * @title PaymentSplitter
 * @dev This contract allows to split Ether payments among a group of accounts. The sender does not need to be aware
 * that the Ether will be split in this way, since it is handled transparently by the contract.
 *
 * The split can be in equal parts or in any other arbitrary proportion. The way this is specified is by assigning each
 * account to a number of shares. Of all the Ether that this contract receives, each account will then be able to claim
 * an amount proportional to the percentage of total shares they were assigned.
 *
 * `PaymentSplitter` follows a _pull payment_ model. This means that payments are not automatically forwarded to the
 * accounts but kept in this contract, and the actual transfer is triggered as a separate step by calling the {release}
 * function.
 */
contract PaymentSplitter is Context {
    event PayeeAdded(address account, uint256 shares);
    event PaymentReleased(address to, uint256 amount);
    event PaymentReceived(address from, uint256 amount);

    uint256 private _totalShares;
    uint256 private _totalReleased;

    mapping(address => uint256) private _shares;
    mapping(address => uint256) private _released;
    address[] private _payees;

    /**
     * @dev Creates an instance of `PaymentSplitter` where each account in `payees` is assigned the number of shares at
     * the matching position in the `shares` array.
     *
     * All addresses in `payees` must be non-zero. Both arrays must have the same non-zero length, and there must be no
     * duplicates in `payees`.
     */
    constructor(address[] memory payees, uint256[] memory shares_) payable {
        require(payees.length == shares_.length, "PaymentSplitter: payees and shares length mismatch");
        require(payees.length > 0, "PaymentSplitter: no payees");

        for (uint256 i = 0; i < payees.length; i++) {
            _addPayee(payees[i], shares_[i]);
        }
    }

    /**
     * @dev The Ether received will be logged with {PaymentReceived} events. Note that these events are not fully
     * reliable: it's possible for a contract to receive Ether without triggering this function. This only affects the
     * reliability of the events, and not the actual splitting of Ether.
     *
     * To learn more about this see the Solidity documentation for
     * https://solidity.readthedocs.io/en/latest/contracts.html#fallback-function[fallback
     * functions].
     */
    receive() external payable virtual {
        emit PaymentReceived(_msgSender(), msg.value);
    }

    /**
     * @dev Getter for the total shares held by payees.
     */
    function totalShares() public view returns (uint256) {
        return _totalShares;
    }

    /**
     * @dev Getter for the total amount of Ether already released.
     */
    function totalReleased() public view returns (uint256) {
        return _totalReleased;
    }

    /**
     * @dev Getter for the amount of shares held by an account.
     */
    function shares(address account) public view returns (uint256) {
        return _shares[account];
    }

    /**
     * @dev Getter for the amount of Ether already released to a payee.
     */
    function released(address account) public view returns (uint256) {
        return _released[account];
    }

    /**
     * @dev Getter for the address of the payee number `index`.
     */
    function payee(uint256 index) public view returns (address) {
        return _payees[index];
    }

    /**
     * @dev Triggers a transfer to `account` of the amount of Ether they are owed, according to their percentage of the
     * total shares and their previous withdrawals.
     */
    function release(address payable account) public virtual {
        require(_shares[account] > 0, "PaymentSplitter: account has no shares");

        uint256 totalReceived = address(this).balance + _totalReleased;
        uint256 payment = (totalReceived * _shares[account]) / _totalShares - _released[account];

        require(payment != 0, "PaymentSplitter: account is not due payment");

        _released[account] = _released[account] + payment;
        _totalReleased = _totalReleased + payment;

        Address.sendValue(account, payment);
        emit PaymentReleased(account, payment);
    }

    /**
     * @dev Add a new payee to the contract.
     * @param account The address of the payee to add.
     * @param shares_ The number of shares owned by the payee.
     */
    function _addPayee(address account, uint256 shares_) private {
        require(account != address(0), "PaymentSplitter: account is the zero address");
        require(shares_ > 0, "PaymentSplitter: shares are 0");
        require(_shares[account] == 0, "PaymentSplitter: account already has shares");

        _payees.push(account);
        _shares[account] = shares_;
        _totalShares = _totalShares + shares_;
        emit PayeeAdded(account, shares_);
    }
}

File 11 of 19 : 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 12 of 19 : IERC721Enumerable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC721.sol";

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

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

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

File 13 of 19 : 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 14 of 19 : 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 15 of 19 : 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 16 of 19 : 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 17 of 19 : 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 18 of 19 : 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);
}

File 19 of 19 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

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

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address payable","name":"_addressParty","type":"address"},{"internalType":"address","name":"_addressCybork","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[],"name":"Pause","type":"event"},{"anonymous":false,"inputs":[],"name":"Unpause","type":"event"},{"inputs":[],"name":"addressCybork","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"calculatePoints","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"calculateRewards","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"claimRewards","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"}],"name":"getNFT","outputs":[{"components":[{"internalType":"uint256","name":"nft_party","type":"uint256"},{"internalType":"uint256","name":"nft_cybork","type":"uint256"},{"internalType":"uint256","name":"staking_time","type":"uint256"}],"internalType":"struct Bank.Token[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"idTokenCybork","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"indexTokenParty","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"isUser","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"receiveEher","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenParty","type":"uint256"},{"internalType":"uint256","name":"_tokenCybork","type":"uint256"}],"name":"stakeNFT","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"stakedToken","outputs":[{"internalType":"uint256","name":"nft_party","type":"uint256"},{"internalType":"uint256","name":"nft_cybork","type":"uint256"},{"internalType":"uint256","name":"staking_time","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalCyborg","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalPartyApe","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalPoints","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenParty","type":"uint256"}],"name":"unstakeNFT","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userPoints","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"userTokenParty","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"users","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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

0000000000000000000000005df340b5d1618c543ac81837da1c2d2b17b3b5d800000000000000000000000004fb03a5bac8eac522891e8dcb003694d75827b3

-----Decoded View---------------
Arg [0] : _addressParty (address): 0x5DF340b5D1618c543aC81837dA1C2d2B17b3B5d8
Arg [1] : _addressCybork (address): 0x04fB03a5BAc8eAC522891E8dCb003694d75827B3

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000005df340b5d1618c543ac81837da1c2d2b17b3b5d8
Arg [1] : 00000000000000000000000004fb03a5bac8eac522891e8dcb003694d75827b3


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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.