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Contract

0x836B4d9C0F01275A28085AceF53AC30460f58242
 

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Set Approval For...192977972024-02-24 13:39:112 days 7 hrs ago1708781951IN
0x836B4d...60f58242
0 ETH0.0010453722.68699168
Set Approval For...192900092024-02-23 11:31:233 days 9 hrs ago1708687883IN
0x836B4d...60f58242
0 ETH0.0015790834.2697505
Set Approval For...192588282024-02-19 2:29:117 days 18 hrs ago1708309751IN
0x836B4d...60f58242
0 ETH0.0009206719.98090182
Set Approval For...192394092024-02-16 8:55:3510 days 12 hrs ago1708073735IN
0x836B4d...60f58242
0 ETH0.000964420.92989142
Set Approval For...192033532024-02-11 7:30:2315 days 13 hrs ago1707636623IN
0x836B4d...60f58242
0 ETH0.0011168824.23906306
Set Approval For...191514942024-02-04 0:48:1122 days 20 hrs ago1707007691IN
0x836B4d...60f58242
0 ETH0.0006013413.05061315
Set Approval For...191173702024-01-30 5:55:3527 days 15 hrs ago1706594135IN
0x836B4d...60f58242
0 ETH0.0005186411.25571753
Set Approval For...191049692024-01-28 12:14:5929 days 8 hrs ago1706444099IN
0x836B4d...60f58242
0 ETH0.0006417513.92753701
Withdraw191037462024-01-28 8:08:1129 days 12 hrs ago1706429291IN
0x836B4d...60f58242
0 ETH0.0005857217.81609037
Set Phase191037452024-01-28 8:07:5929 days 12 hrs ago1706429279IN
0x836B4d...60f58242
0 ETH0.0004068316.99382175
Set Approval For...191021392024-01-28 2:43:3529 days 18 hrs ago1706409815IN
0x836B4d...60f58242
0 ETH0.000525611.40690602
Set Approval For...190987572024-01-27 15:17:3530 days 5 hrs ago1706368655IN
0x836B4d...60f58242
0 ETH0.0012019826.08593448
Safe Transfer Fr...190986992024-01-27 15:05:5930 days 5 hrs ago1706367959IN
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0 ETH0.0011241526.50554135
Safe Transfer Fr...190986932024-01-27 15:04:4730 days 6 hrs ago1706367887IN
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0 ETH0.0013208427.976896
Safe Transfer Fr...190986852024-01-27 15:03:1130 days 6 hrs ago1706367791IN
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0 ETH0.0012895827.31473326
Safe Transfer Fr...190986582024-01-27 14:57:3530 days 6 hrs ago1706367455IN
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0 ETH0.0009812615.25781991
Presale Mint190980532024-01-27 12:56:1130 days 8 hrs ago1706360171IN
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0.001 ETH0.0013228812.01564032
Presale Mint190971552024-01-27 9:54:4730 days 11 hrs ago1706349287IN
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0.001 ETH0.0014041312.75502216
Presale Mint190966822024-01-27 8:19:1130 days 12 hrs ago1706343551IN
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0.001 ETH0.0014698315.80517566
Presale Mint190963012024-01-27 7:02:3530 days 14 hrs ago1706338955IN
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0.001 ETH0.0012520511.37225019
Presale Mint190961302024-01-27 6:27:4730 days 14 hrs ago1706336867IN
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0.001 ETH0.0012298911.17099498
Presale Mint190960492024-01-27 6:11:3530 days 14 hrs ago1706335895IN
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0.001 ETH0.0010104210.86518765
Presale Mint190960252024-01-27 6:06:4730 days 14 hrs ago1706335607IN
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0.001 ETH0.0011989610.89011411
Presale Mint190960112024-01-27 6:03:5930 days 15 hrs ago1706335439IN
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0.001 ETH0.0012708411.54294232
Set Phase190959892024-01-27 5:59:3530 days 15 hrs ago1706335175IN
0x836B4d...60f58242
0 ETH0.0004921810.73431902
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191037462024-01-28 8:08:1129 days 12 hrs ago1706429291
0x836B4d...60f58242
0.008 ETH
183618802023-10-16 8:56:11133 days 12 hrs ago1697446571
0x836B4d...60f58242
0.025 ETH
176752122023-07-12 4:48:47229 days 16 hrs ago1689137327
0x836B4d...60f58242
0.101 ETH
171133692023-04-24 3:07:23308 days 17 hrs ago1682305643
0x836B4d...60f58242
0.317 ETH
159652082022-11-14 2:11:59469 days 18 hrs ago1668391919
0x836B4d...60f58242
1.297 ETH
159425562022-11-10 22:18:59472 days 22 hrs ago1668118739
0x836B4d...60f58242
2.538 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
CNPR

Compiler Version
v0.8.6+commit.11564f7e

Optimization Enabled:
Yes with 800 runs

Other Settings:
default evmVersion
File 1 of 10 : CNPR.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;

import "erc721a/contracts/ERC721A.sol";
import "./CNPRadmin.sol";
import {CouponSet} from "./lib/CouponSet.sol";
import "./lib/CNPRdescriptor.sol";

/**
 *  @title The CNPR ERC-721A token.
 *  @dev This is the contract we deploy to the blockchain.
 */
contract CNPR is CNPRadmin, ERC721A("CNP Rookies", "CNPR") {
    using CouponSet for CouponSet.Coupon;

    constructor(address _adminSigner) {
        admin = address(0);
        adminSigner = _adminSigner;
        _safeMint(WITHDRAW_ADDRESS, 500);
    }

    /**
     *  @notice If the conditions are met, a CNPR token is minted and sent to the specified address.
     *  @dev Whitelist authentication creates an off-chain signed coupon for each address and restores the public address for authentication (ECDSA).
     *  @param _quantity Amount of tokens.
     *  @param _allotted The total number of tokens the minter is allowed to claim.
     *  @param _coupon Coupon for verifying the signer.
     */
    function presaleMint(
        uint256 _quantity,
        uint256 _allotted,
        CouponSet.Coupon memory _coupon
    ) external payable {
        require(phase == SalePhase.PreSale, "presale event is not active");
        require(_quantity != 0, "the quantity is zero");
        require(
            _coupon._isVerifiedCoupon(
                CouponSet.CouponType.Presale,
                _allotted,
                presaleMintIndex,
                adminSigner
            ),
            "invalid coupon"
        );
        require(
            presaleMintCount[msg.sender] + _quantity <= _allotted,
            "exceeds number of earned Tokens"
        );
        require(MINT_COST * _quantity <= msg.value, "not enough eth");
        require(
            _quantity + totalSupply() <= MAX_SUPPLY,
            "claim is over the max supply"
        );
        presaleMintCount[msg.sender] += _quantity;
        _safeMint(msg.sender, _quantity);
    }

    /**
     *  @notice If the conditions are met, the existing tokens are burned and new tokens are minted.
     *  @dev Whitelist authentication creates an off-chain signed coupon for each address and restores the public address for authentication (ECDSA).
     *  @param _burnTokenIds The ID of tokens to be burned.
     *  @param _allotted The total number of tokens the minter is allowed to claim.
     *  @param _coupon Coupon for verifying the signer.
     */
    function burnMint(
        uint256[] memory _burnTokenIds,
        uint256 _allotted,
        CouponSet.Coupon memory _coupon
    ) external payable {
        require(phase == SalePhase.BurnMint, "burn mint is not activated");
        require(_burnTokenIds.length != 0, "the quantity is zero");
        require(
            _coupon._isVerifiedCoupon(
                CouponSet.CouponType.BurnMint,
                _allotted,
                burnMintIndex,
                adminSigner
            ),
            "invalid coupon"
        );
        require(
            burnMintStructs[burnMintIndex].numberOfBurnMintByAddress[
                msg.sender
            ] +
                _burnTokenIds.length <=
                _allotted,
            "address already claimed max amount"
        );
        require(
            burnMintCost * _burnTokenIds.length <= msg.value,
            "not enough eth"
        );
        require(
            _burnTokenIds.length + _totalBurned() <= maxBurnMintSupply,
            "over total burn count"
        );

        burnMintStructs[burnMintIndex].numberOfBurnMintByAddress[
                msg.sender
            ] += _burnTokenIds.length;

        for (uint256 i = 0; i < _burnTokenIds.length; i++) {
            uint256 tokenId = _burnTokenIds[i];
            require(
                _msgSender() == ownerOf(tokenId),
                "sender is not the owner of the token"
            );
            _burn(tokenId);
        }

        _safeMint(msg.sender, _burnTokenIds.length);
    }

    /**
     *  @notice Only owners or admins can use this function to mint CNPR tokens.
     *  @dev Tokens held by the operation are minted by the constructor, but this function is used when there is an urgent need for more.
     *  It is also used for airdropping.
     *  Only callable by the owner or admin.
     *  @param _to The Address to send token.
     *  @param _quantity The amount of tokens to be minted.
     */
    function adminMint(address[] calldata _to, uint256[] memory _quantity)
        external
        onlyAdmin
    {
        require(
            _to.length == _quantity.length,
            "the address and quantity do not match"
        );

        uint256 _mintAmount = 0;
        for (uint256 i = 0; i < _quantity.length; i++) {
            require(_quantity[i] != 0, "the quantity is zero");
            _mintAmount += _quantity[i];
        }

        require(
            _mintAmount + totalSupply() <= MAX_SUPPLY,
            "claim is over the max supply"
        );

        for (uint256 i = 0; i < _quantity.length; i++) {
            _safeMint(_to[i], _quantity[i]);
        }
    }

    /**
     *  @notice Given a token ID, construct a token URI for the CNPR.
     *  @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     *  @param _tokenId The token id.
     */
    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override
        returns (string memory)
    {
        require(_exists(_tokenId), "URI query for nonexistent token");

        if (isOnchain) {
            return descriptor.tokenURI(_tokenId);
        }

        return
            string(abi.encodePacked(ERC721A.tokenURI(_tokenId), baseExtension));
    }

    /**
     *  @dev Returns whether `tokenId` exists.
     */
    function exists(uint256 tokenId) public view virtual returns (bool) {
        return _exists(tokenId);
    }

    /**
     * @dev Returns the total number of tokens burned.
     */
    function totalBurned() public view virtual returns (uint256) {
        return _totalBurned();
    }

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

    /**
     *  @dev Set start to 1 for token ID.
     */
    function _startTokenId() internal view virtual override returns (uint256) {
        return 1;
    }
}

File 2 of 10 : ERC721A.sol
// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.2.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import './IERC721A.sol';

/**
 * @dev Interface of ERC721 token receiver.
 */
interface ERC721A__IERC721Receiver {
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

/**
 * @title ERC721A
 *
 * @dev Implementation of the [ERC721](https://eips.ethereum.org/EIPS/eip-721)
 * Non-Fungible Token Standard, including the Metadata extension.
 * Optimized for lower gas during batch mints.
 *
 * Token IDs are minted in sequential order (e.g. 0, 1, 2, 3, ...)
 * starting from `_startTokenId()`.
 *
 * Assumptions:
 *
 * - An owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 * - The maximum token ID cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721A is IERC721A {
    // Reference type for token approval.
    struct TokenApprovalRef {
        address value;
    }

    // =============================================================
    //                           CONSTANTS
    // =============================================================

    // Mask of an entry in packed address data.
    uint256 private constant _BITMASK_ADDRESS_DATA_ENTRY = (1 << 64) - 1;

    // The bit position of `numberMinted` in packed address data.
    uint256 private constant _BITPOS_NUMBER_MINTED = 64;

    // The bit position of `numberBurned` in packed address data.
    uint256 private constant _BITPOS_NUMBER_BURNED = 128;

    // The bit position of `aux` in packed address data.
    uint256 private constant _BITPOS_AUX = 192;

    // Mask of all 256 bits in packed address data except the 64 bits for `aux`.
    uint256 private constant _BITMASK_AUX_COMPLEMENT = (1 << 192) - 1;

    // The bit position of `startTimestamp` in packed ownership.
    uint256 private constant _BITPOS_START_TIMESTAMP = 160;

    // The bit mask of the `burned` bit in packed ownership.
    uint256 private constant _BITMASK_BURNED = 1 << 224;

    // The bit position of the `nextInitialized` bit in packed ownership.
    uint256 private constant _BITPOS_NEXT_INITIALIZED = 225;

    // The bit mask of the `nextInitialized` bit in packed ownership.
    uint256 private constant _BITMASK_NEXT_INITIALIZED = 1 << 225;

    // The bit position of `extraData` in packed ownership.
    uint256 private constant _BITPOS_EXTRA_DATA = 232;

    // Mask of all 256 bits in a packed ownership except the 24 bits for `extraData`.
    uint256 private constant _BITMASK_EXTRA_DATA_COMPLEMENT = (1 << 232) - 1;

    // The mask of the lower 160 bits for addresses.
    uint256 private constant _BITMASK_ADDRESS = (1 << 160) - 1;

    // The maximum `quantity` that can be minted with {_mintERC2309}.
    // This limit is to prevent overflows on the address data entries.
    // For a limit of 5000, a total of 3.689e15 calls to {_mintERC2309}
    // is required to cause an overflow, which is unrealistic.
    uint256 private constant _MAX_MINT_ERC2309_QUANTITY_LIMIT = 5000;

    // The `Transfer` event signature is given by:
    // `keccak256(bytes("Transfer(address,address,uint256)"))`.
    bytes32 private constant _TRANSFER_EVENT_SIGNATURE =
        0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef;

    // =============================================================
    //                            STORAGE
    // =============================================================

    // The next token ID to be minted.
    uint256 private _currentIndex;

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

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to ownership details
    // An empty struct value does not necessarily mean the token is unowned.
    // See {_packedOwnershipOf} implementation for details.
    //
    // Bits Layout:
    // - [0..159]   `addr`
    // - [160..223] `startTimestamp`
    // - [224]      `burned`
    // - [225]      `nextInitialized`
    // - [232..255] `extraData`
    mapping(uint256 => uint256) private _packedOwnerships;

    // Mapping owner address to address data.
    //
    // Bits Layout:
    // - [0..63]    `balance`
    // - [64..127]  `numberMinted`
    // - [128..191] `numberBurned`
    // - [192..255] `aux`
    mapping(address => uint256) private _packedAddressData;

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

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

    // =============================================================
    //                          CONSTRUCTOR
    // =============================================================

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

    // =============================================================
    //                   TOKEN COUNTING OPERATIONS
    // =============================================================

    /**
     * @dev Returns the starting token ID.
     * To change the starting token ID, please override this function.
     */
    function _startTokenId() internal view virtual returns (uint256) {
        return 0;
    }

    /**
     * @dev Returns the next token ID to be minted.
     */
    function _nextTokenId() internal view virtual returns (uint256) {
        return _currentIndex;
    }

    /**
     * @dev Returns the total number of tokens in existence.
     * Burned tokens will reduce the count.
     * To get the total number of tokens minted, please see {_totalMinted}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        // Counter underflow is impossible as _burnCounter cannot be incremented
        // more than `_currentIndex - _startTokenId()` times.
        unchecked {
            return _currentIndex - _burnCounter - _startTokenId();
        }
    }

    /**
     * @dev Returns the total amount of tokens minted in the contract.
     */
    function _totalMinted() internal view virtual returns (uint256) {
        // Counter underflow is impossible as `_currentIndex` does not decrement,
        // and it is initialized to `_startTokenId()`.
        unchecked {
            return _currentIndex - _startTokenId();
        }
    }

    /**
     * @dev Returns the total number of tokens burned.
     */
    function _totalBurned() internal view virtual returns (uint256) {
        return _burnCounter;
    }

    // =============================================================
    //                    ADDRESS DATA OPERATIONS
    // =============================================================

    /**
     * @dev Returns the number of tokens in `owner`'s account.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        if (owner == address(0)) revert BalanceQueryForZeroAddress();
        return _packedAddressData[owner] & _BITMASK_ADDRESS_DATA_ENTRY;
    }

    /**
     * Returns the number of tokens minted by `owner`.
     */
    function _numberMinted(address owner) internal view returns (uint256) {
        return (_packedAddressData[owner] >> _BITPOS_NUMBER_MINTED) & _BITMASK_ADDRESS_DATA_ENTRY;
    }

    /**
     * Returns the number of tokens burned by or on behalf of `owner`.
     */
    function _numberBurned(address owner) internal view returns (uint256) {
        return (_packedAddressData[owner] >> _BITPOS_NUMBER_BURNED) & _BITMASK_ADDRESS_DATA_ENTRY;
    }

    /**
     * Returns the auxiliary data for `owner`. (e.g. number of whitelist mint slots used).
     */
    function _getAux(address owner) internal view returns (uint64) {
        return uint64(_packedAddressData[owner] >> _BITPOS_AUX);
    }

    /**
     * Sets the auxiliary data for `owner`. (e.g. number of whitelist mint slots used).
     * If there are multiple variables, please pack them into a uint64.
     */
    function _setAux(address owner, uint64 aux) internal virtual {
        uint256 packed = _packedAddressData[owner];
        uint256 auxCasted;
        // Cast `aux` with assembly to avoid redundant masking.
        assembly {
            auxCasted := aux
        }
        packed = (packed & _BITMASK_AUX_COMPLEMENT) | (auxCasted << _BITPOS_AUX);
        _packedAddressData[owner] = packed;
    }

    // =============================================================
    //                            IERC165
    // =============================================================

    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30000 gas.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        // The interface IDs are constants representing the first 4 bytes
        // of the XOR of all function selectors in the interface.
        // See: [ERC165](https://eips.ethereum.org/EIPS/eip-165)
        // (e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)`)
        return
            interfaceId == 0x01ffc9a7 || // ERC165 interface ID for ERC165.
            interfaceId == 0x80ac58cd || // ERC165 interface ID for ERC721.
            interfaceId == 0x5b5e139f; // ERC165 interface ID for ERC721Metadata.
    }

    // =============================================================
    //                        IERC721Metadata
    // =============================================================

    /**
     * @dev Returns the token collection name.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

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

    /**
     * @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, it can be overridden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return '';
    }

    // =============================================================
    //                     OWNERSHIPS OPERATIONS
    // =============================================================

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        return address(uint160(_packedOwnershipOf(tokenId)));
    }

    /**
     * @dev Gas spent here starts off proportional to the maximum mint batch size.
     * It gradually moves to O(1) as tokens get transferred around over time.
     */
    function _ownershipOf(uint256 tokenId) internal view virtual returns (TokenOwnership memory) {
        return _unpackedOwnership(_packedOwnershipOf(tokenId));
    }

    /**
     * @dev Returns the unpacked `TokenOwnership` struct at `index`.
     */
    function _ownershipAt(uint256 index) internal view virtual returns (TokenOwnership memory) {
        return _unpackedOwnership(_packedOwnerships[index]);
    }

    /**
     * @dev Initializes the ownership slot minted at `index` for efficiency purposes.
     */
    function _initializeOwnershipAt(uint256 index) internal virtual {
        if (_packedOwnerships[index] == 0) {
            _packedOwnerships[index] = _packedOwnershipOf(index);
        }
    }

    /**
     * Returns the packed ownership data of `tokenId`.
     */
    function _packedOwnershipOf(uint256 tokenId) private view returns (uint256) {
        uint256 curr = tokenId;

        unchecked {
            if (_startTokenId() <= curr)
                if (curr < _currentIndex) {
                    uint256 packed = _packedOwnerships[curr];
                    // If not burned.
                    if (packed & _BITMASK_BURNED == 0) {
                        // Invariant:
                        // There will always be an initialized ownership slot
                        // (i.e. `ownership.addr != address(0) && ownership.burned == false`)
                        // before an unintialized ownership slot
                        // (i.e. `ownership.addr == address(0) && ownership.burned == false`)
                        // Hence, `curr` will not underflow.
                        //
                        // We can directly compare the packed value.
                        // If the address is zero, packed will be zero.
                        while (packed == 0) {
                            packed = _packedOwnerships[--curr];
                        }
                        return packed;
                    }
                }
        }
        revert OwnerQueryForNonexistentToken();
    }

    /**
     * @dev Returns the unpacked `TokenOwnership` struct from `packed`.
     */
    function _unpackedOwnership(uint256 packed) private pure returns (TokenOwnership memory ownership) {
        ownership.addr = address(uint160(packed));
        ownership.startTimestamp = uint64(packed >> _BITPOS_START_TIMESTAMP);
        ownership.burned = packed & _BITMASK_BURNED != 0;
        ownership.extraData = uint24(packed >> _BITPOS_EXTRA_DATA);
    }

    /**
     * @dev Packs ownership data into a single uint256.
     */
    function _packOwnershipData(address owner, uint256 flags) private view returns (uint256 result) {
        assembly {
            // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.
            owner := and(owner, _BITMASK_ADDRESS)
            // `owner | (block.timestamp << _BITPOS_START_TIMESTAMP) | flags`.
            result := or(owner, or(shl(_BITPOS_START_TIMESTAMP, timestamp()), flags))
        }
    }

    /**
     * @dev Returns the `nextInitialized` flag set if `quantity` equals 1.
     */
    function _nextInitializedFlag(uint256 quantity) private pure returns (uint256 result) {
        // For branchless setting of the `nextInitialized` flag.
        assembly {
            // `(quantity == 1) << _BITPOS_NEXT_INITIALIZED`.
            result := shl(_BITPOS_NEXT_INITIALIZED, eq(quantity, 1))
        }
    }

    // =============================================================
    //                      APPROVAL OPERATIONS
    // =============================================================

    /**
     * @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) public virtual override {
        address owner = ownerOf(tokenId);

        if (_msgSenderERC721A() != owner)
            if (!isApprovedForAll(owner, _msgSenderERC721A())) {
                revert ApprovalCallerNotOwnerNorApproved();
            }

        _tokenApprovals[tokenId].value = to;
        emit Approval(owner, to, tokenId);
    }

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();

        return _tokenApprovals[tokenId].value;
    }

    /**
     * @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) public virtual override {
        if (operator == _msgSenderERC721A()) revert ApproveToCaller();

        _operatorApprovals[_msgSenderERC721A()][operator] = approved;
        emit ApprovalForAll(_msgSenderERC721A(), operator, approved);
    }

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

    /**
     * @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. See {_mint}.
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return
            _startTokenId() <= tokenId &&
            tokenId < _currentIndex && // If within bounds,
            _packedOwnerships[tokenId] & _BITMASK_BURNED == 0; // and not burned.
    }

    /**
     * @dev Returns whether `msgSender` is equal to `approvedAddress` or `owner`.
     */
    function _isSenderApprovedOrOwner(
        address approvedAddress,
        address owner,
        address msgSender
    ) private pure returns (bool result) {
        assembly {
            // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.
            owner := and(owner, _BITMASK_ADDRESS)
            // Mask `msgSender` to the lower 160 bits, in case the upper bits somehow aren't clean.
            msgSender := and(msgSender, _BITMASK_ADDRESS)
            // `msgSender == owner || msgSender == approvedAddress`.
            result := or(eq(msgSender, owner), eq(msgSender, approvedAddress))
        }
    }

    /**
     * @dev Returns the storage slot and value for the approved address of `tokenId`.
     */
    function _getApprovedSlotAndAddress(uint256 tokenId)
        private
        view
        returns (uint256 approvedAddressSlot, address approvedAddress)
    {
        TokenApprovalRef storage tokenApproval = _tokenApprovals[tokenId];
        // The following is equivalent to `approvedAddress = _tokenApprovals[tokenId]`.
        assembly {
            approvedAddressSlot := tokenApproval.slot
            approvedAddress := sload(approvedAddressSlot)
        }
    }

    // =============================================================
    //                      TRANSFER OPERATIONS
    // =============================================================

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * 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
    ) public virtual override {
        uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);

        if (address(uint160(prevOwnershipPacked)) != from) revert TransferFromIncorrectOwner();

        (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);

        // The nested ifs save around 20+ gas over a compound boolean condition.
        if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))
            if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();

        if (to == address(0)) revert TransferToZeroAddress();

        _beforeTokenTransfers(from, to, tokenId, 1);

        // Clear approvals from the previous owner.
        assembly {
            if approvedAddress {
                // This is equivalent to `delete _tokenApprovals[tokenId]`.
                sstore(approvedAddressSlot, 0)
            }
        }

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

            // Updates:
            // - `address` to the next owner.
            // - `startTimestamp` to the timestamp of transfering.
            // - `burned` to `false`.
            // - `nextInitialized` to `true`.
            _packedOwnerships[tokenId] = _packOwnershipData(
                to,
                _BITMASK_NEXT_INITIALIZED | _nextExtraData(from, to, prevOwnershipPacked)
            );

            // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .
            if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) {
                uint256 nextTokenId = tokenId + 1;
                // If the next slot's address is zero and not burned (i.e. packed value is zero).
                if (_packedOwnerships[nextTokenId] == 0) {
                    // If the next slot is within bounds.
                    if (nextTokenId != _currentIndex) {
                        // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
                        _packedOwnerships[nextTokenId] = prevOwnershipPacked;
                    }
                }
            }
        }

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

    /**
     * @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, '');
    }

    /**
     * @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 memory _data
    ) public virtual override {
        transferFrom(from, to, tokenId);
        if (to.code.length != 0)
            if (!_checkContractOnERC721Received(from, to, tokenId, _data)) {
                revert TransferToNonERC721ReceiverImplementer();
            }
    }

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

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

    /**
     * @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target contract.
     *
     * `from` - Previous owner of the given token ID.
     * `to` - Target address that will receive the token.
     * `tokenId` - Token ID to be transferred.
     * `_data` - Optional data to send along with the call.
     *
     * Returns whether the call correctly returned the expected magic value.
     */
    function _checkContractOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        try ERC721A__IERC721Receiver(to).onERC721Received(_msgSenderERC721A(), from, tokenId, _data) returns (
            bytes4 retval
        ) {
            return retval == ERC721A__IERC721Receiver(to).onERC721Received.selector;
        } catch (bytes memory reason) {
            if (reason.length == 0) {
                revert TransferToNonERC721ReceiverImplementer();
            } else {
                assembly {
                    revert(add(32, reason), mload(reason))
                }
            }
        }
    }

    // =============================================================
    //                        MINT OPERATIONS
    // =============================================================

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

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

        // Overflows are incredibly unrealistic.
        // `balance` and `numberMinted` have a maximum limit of 2**64.
        // `tokenId` has a maximum limit of 2**256.
        unchecked {
            // Updates:
            // - `balance += quantity`.
            // - `numberMinted += quantity`.
            //
            // We can directly add to the `balance` and `numberMinted`.
            _packedAddressData[to] += quantity * ((1 << _BITPOS_NUMBER_MINTED) | 1);

            // Updates:
            // - `address` to the owner.
            // - `startTimestamp` to the timestamp of minting.
            // - `burned` to `false`.
            // - `nextInitialized` to `quantity == 1`.
            _packedOwnerships[startTokenId] = _packOwnershipData(
                to,
                _nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)
            );

            uint256 toMasked;
            uint256 end = startTokenId + quantity;

            // Use assembly to loop and emit the `Transfer` event for gas savings.
            assembly {
                // Mask `to` to the lower 160 bits, in case the upper bits somehow aren't clean.
                toMasked := and(to, _BITMASK_ADDRESS)
                // Emit the `Transfer` event.
                log4(
                    0, // Start of data (0, since no data).
                    0, // End of data (0, since no data).
                    _TRANSFER_EVENT_SIGNATURE, // Signature.
                    0, // `address(0)`.
                    toMasked, // `to`.
                    startTokenId // `tokenId`.
                )

                for {
                    let tokenId := add(startTokenId, 1)
                } iszero(eq(tokenId, end)) {
                    tokenId := add(tokenId, 1)
                } {
                    // Emit the `Transfer` event. Similar to above.
                    log4(0, 0, _TRANSFER_EVENT_SIGNATURE, 0, toMasked, tokenId)
                }
            }
            if (toMasked == 0) revert MintToZeroAddress();

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

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * This function is intended for efficient minting only during contract creation.
     *
     * It emits only one {ConsecutiveTransfer} as defined in
     * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309),
     * instead of a sequence of {Transfer} event(s).
     *
     * Calling this function outside of contract creation WILL make your contract
     * non-compliant with the ERC721 standard.
     * For full ERC721 compliance, substituting ERC721 {Transfer} event(s) with the ERC2309
     * {ConsecutiveTransfer} event is only permissible during contract creation.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {ConsecutiveTransfer} event.
     */
    function _mintERC2309(address to, uint256 quantity) internal virtual {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();
        if (quantity > _MAX_MINT_ERC2309_QUANTITY_LIMIT) revert MintERC2309QuantityExceedsLimit();

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

        // Overflows are unrealistic due to the above check for `quantity` to be below the limit.
        unchecked {
            // Updates:
            // - `balance += quantity`.
            // - `numberMinted += quantity`.
            //
            // We can directly add to the `balance` and `numberMinted`.
            _packedAddressData[to] += quantity * ((1 << _BITPOS_NUMBER_MINTED) | 1);

            // Updates:
            // - `address` to the owner.
            // - `startTimestamp` to the timestamp of minting.
            // - `burned` to `false`.
            // - `nextInitialized` to `quantity == 1`.
            _packedOwnerships[startTokenId] = _packOwnershipData(
                to,
                _nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)
            );

            emit ConsecutiveTransfer(startTokenId, startTokenId + quantity - 1, address(0), to);

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

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

        unchecked {
            if (to.code.length != 0) {
                uint256 end = _currentIndex;
                uint256 index = end - quantity;
                do {
                    if (!_checkContractOnERC721Received(address(0), to, index++, _data)) {
                        revert TransferToNonERC721ReceiverImplementer();
                    }
                } while (index < end);
                // Reentrancy protection.
                if (_currentIndex != end) revert();
            }
        }
    }

    /**
     * @dev Equivalent to `_safeMint(to, quantity, '')`.
     */
    function _safeMint(address to, uint256 quantity) internal virtual {
        _safeMint(to, quantity, '');
    }

    // =============================================================
    //                        BURN OPERATIONS
    // =============================================================

    /**
     * @dev Equivalent to `_burn(tokenId, false)`.
     */
    function _burn(uint256 tokenId) internal virtual {
        _burn(tokenId, false);
    }

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

        address from = address(uint160(prevOwnershipPacked));

        (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);

        if (approvalCheck) {
            // The nested ifs save around 20+ gas over a compound boolean condition.
            if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))
                if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();
        }

        _beforeTokenTransfers(from, address(0), tokenId, 1);

        // Clear approvals from the previous owner.
        assembly {
            if approvedAddress {
                // This is equivalent to `delete _tokenApprovals[tokenId]`.
                sstore(approvedAddressSlot, 0)
            }
        }

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as `tokenId` would have to be 2**256.
        unchecked {
            // Updates:
            // - `balance -= 1`.
            // - `numberBurned += 1`.
            //
            // We can directly decrement the balance, and increment the number burned.
            // This is equivalent to `packed -= 1; packed += 1 << _BITPOS_NUMBER_BURNED;`.
            _packedAddressData[from] += (1 << _BITPOS_NUMBER_BURNED) - 1;

            // Updates:
            // - `address` to the last owner.
            // - `startTimestamp` to the timestamp of burning.
            // - `burned` to `true`.
            // - `nextInitialized` to `true`.
            _packedOwnerships[tokenId] = _packOwnershipData(
                from,
                (_BITMASK_BURNED | _BITMASK_NEXT_INITIALIZED) | _nextExtraData(from, address(0), prevOwnershipPacked)
            );

            // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .
            if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) {
                uint256 nextTokenId = tokenId + 1;
                // If the next slot's address is zero and not burned (i.e. packed value is zero).
                if (_packedOwnerships[nextTokenId] == 0) {
                    // If the next slot is within bounds.
                    if (nextTokenId != _currentIndex) {
                        // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
                        _packedOwnerships[nextTokenId] = prevOwnershipPacked;
                    }
                }
            }
        }

        emit Transfer(from, address(0), tokenId);
        _afterTokenTransfers(from, address(0), tokenId, 1);

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

    // =============================================================
    //                     EXTRA DATA OPERATIONS
    // =============================================================

    /**
     * @dev Directly sets the extra data for the ownership data `index`.
     */
    function _setExtraDataAt(uint256 index, uint24 extraData) internal virtual {
        uint256 packed = _packedOwnerships[index];
        if (packed == 0) revert OwnershipNotInitializedForExtraData();
        uint256 extraDataCasted;
        // Cast `extraData` with assembly to avoid redundant masking.
        assembly {
            extraDataCasted := extraData
        }
        packed = (packed & _BITMASK_EXTRA_DATA_COMPLEMENT) | (extraDataCasted << _BITPOS_EXTRA_DATA);
        _packedOwnerships[index] = packed;
    }

    /**
     * @dev Called during each token transfer to set the 24bit `extraData` field.
     * Intended to be overridden by the cosumer contract.
     *
     * `previousExtraData` - the value of `extraData` before transfer.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, `tokenId` will be burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _extraData(
        address from,
        address to,
        uint24 previousExtraData
    ) internal view virtual returns (uint24) {}

    /**
     * @dev Returns the next extra data for the packed ownership data.
     * The returned result is shifted into position.
     */
    function _nextExtraData(
        address from,
        address to,
        uint256 prevOwnershipPacked
    ) private view returns (uint256) {
        uint24 extraData = uint24(prevOwnershipPacked >> _BITPOS_EXTRA_DATA);
        return uint256(_extraData(from, to, extraData)) << _BITPOS_EXTRA_DATA;
    }

    // =============================================================
    //                       OTHER OPERATIONS
    // =============================================================

    /**
     * @dev Returns the message sender (defaults to `msg.sender`).
     *
     * If you are writing GSN compatible contracts, you need to override this function.
     */
    function _msgSenderERC721A() internal view virtual returns (address) {
        return msg.sender;
    }

    /**
     * @dev Converts a uint256 to its ASCII string decimal representation.
     */
    function _toString(uint256 value) internal pure virtual returns (string memory ptr) {
        assembly {
            // The maximum value of a uint256 contains 78 digits (1 byte per digit),
            // but we allocate 128 bytes to keep the free memory pointer 32-byte word aliged.
            // We will need 1 32-byte word to store the length,
            // and 3 32-byte words to store a maximum of 78 digits. Total: 32 + 3 * 32 = 128.
            ptr := add(mload(0x40), 128)
            // Update the free memory pointer to allocate.
            mstore(0x40, ptr)

            // Cache the end of the memory to calculate the length later.
            let end := ptr

            // We write the string from the rightmost digit to the leftmost digit.
            // The following is essentially a do-while loop that also handles the zero case.
            // Costs a bit more than early returning for the zero case,
            // but cheaper in terms of deployment and overall runtime costs.
            for {
                // Initialize and perform the first pass without check.
                let temp := value
                // Move the pointer 1 byte leftwards to point to an empty character slot.
                ptr := sub(ptr, 1)
                // Write the character to the pointer.
                // The ASCII index of the '0' character is 48.
                mstore8(ptr, add(48, mod(temp, 10)))
                temp := div(temp, 10)
            } temp {
                // Keep dividing `temp` until zero.
                temp := div(temp, 10)
            } {
                // Body of the for loop.
                ptr := sub(ptr, 1)
                mstore8(ptr, add(48, mod(temp, 10)))
            }

            let length := sub(end, ptr)
            // Move the pointer 32 bytes leftwards to make room for the length.
            ptr := sub(ptr, 32)
            // Store the length.
            mstore(ptr, length)
        }
    }
}

File 3 of 10 : CNPRadmin.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;

import "./CNPRcore.sol";
import "./interface/ICNPRdescriptor.sol";

/**
 *  @title CNPRadmin abstract contract for CNPR.
 *  @dev A collection of functions that can only be operated by the owner or admin.
 */
abstract contract CNPRadmin is CNPRcore {
    /**
     *  @notice Check to see if you have admins' permissions.
     */
    modifier onlyAdmin() {
        require(
            owner() == _msgSender() || admin == _msgSender(),
            "caller is not the admin"
        );
        _;
    }

    /**
     *  @notice Move money to a designated address in an emergency.
     *  @dev Allow the owner to send funds directly to the recipient.
     *  This is for emergency purposes and use withdraw for regular withdraw.
     *  Only callable by the owner.
     *  @param _recipient The address of the recipient.
     */
    function emergencyWithdraw(address _recipient) external onlyOwner {
        require(_recipient != address(0), "recipient shouldn't be 0");
        (bool sent, ) = _recipient.call{value: address(this).balance}("");
        require(sent, "failed to withdraw");
    }

    /**
     *  @notice Move all of the funds to the fund manager contract.
     *  @dev Only callable by the admin.
     */
    function withdraw() external onlyAdmin {
        require(
            WITHDRAW_ADDRESS != address(0),
            "WITHDRAW_ADDRESS shouldn't be 0"
        );
        (bool sent, ) = WITHDRAW_ADDRESS.call{value: address(this).balance}("");
        require(sent, "failed to move fund to WITHDRAW_ADDRESS contract");
    }

    /**
     *  @notice Set the admin.
     *  @dev Only callable by the owner.
     *  @param _admin The address of the admin.
     */
    function setAdmin(address _admin) external onlyOwner {
        require(_admin != address(0), "address shouldn't be 0");
        admin = _admin;
    }

    /**
     *  @notice Set the adminSigner.
     *  @dev Only callable by the or admin.
     *  @param _adminSigner The address of the adminSigner.
     */
    function setAdminSigner(address _adminSigner) external onlyAdmin {
        require(_adminSigner != address(0), "address shouldn't be 0");
        adminSigner = _adminSigner;
    }

    /**
     *  @notice Set the phase.
     *  @dev Only callable by the admin.
     *  @param _phase The phase number of the project.
     */
    function setPhase(SalePhase _phase) external onlyAdmin {
        phase = _phase;
    }

    /**
     *  @notice Set the burn mint cost.
     *  @dev Only callable by the admin.
     *  @param _cost The cost of the burn mint.
     */
    function setBurnMintCost(uint256 _cost) external onlyAdmin {
        burnMintCost = _cost;
    }

    /**
     *  @notice Set the max amount supply of burn mint.
     *  @dev Only callable by the admin.
     *  @param _amount The max amount supply of the burn mint.
     */
    function setMaxBurnMintSupply(uint256 _amount) external onlyAdmin {
        maxBurnMintSupply = _amount;
    }

    /**
     *  @notice Set the index of the presale coupon.
     *  @dev Only callable by the admin.
     *  @param _index The index of the presale mint.
     */
    function setPresaleMintIndex(uint256 _index) external onlyAdmin {
        presaleMintIndex = _index;
    }

    /**
     *  @notice Set the index to change the burn mint count each time and the coupon index.
     *  Makes the previous index used and unusable.
     *  @dev Only callable by the admin.
     *  @param _index The index of the burn mint.
     */
    function setBurnMintIndex(uint256 _index) external onlyAdmin {
        require(
            burnMintStructs[_index].isDone != true,
            "this index has already been used"
        );
        bool done = !burnMintStructs[burnMintIndex].isDone;
        burnMintStructs[burnMintIndex].isDone = done;
        burnMintIndex = _index;
    }

    /**
     *  @notice Set the token URI descriptor.
     *  @dev Only callable by the admin.
     *  @param _descriptor The address of the descriptor.
     */
    function setCnprDescriptor(ICNPRdescriptor _descriptor) external onlyAdmin {
        bool onChain = true;
        isOnchain = onChain;
        descriptor = _descriptor;
    }

    /**
     *  @notice Set the base URI for all token IDs.
     *  @dev Only callable by the admin.
     *  @param _baseURI The baseURI of the token.
     */
    function setBaseURI(string memory _baseURI) external onlyAdmin {
        baseURI = _baseURI;
    }

    /**
     *  @notice Set the base URI extension for all token IDs.
     *  @dev Only callable by the admin.
     *  @param _baseExtension The base extension of the token.
     */
    function setBaseExtension(string memory _baseExtension) external onlyAdmin {
        baseExtension = _baseExtension;
    }

    /**
     *  @notice Toggle a boolean value that determines if `tokenURI` returns an on-chain or off-chain.
     *  @dev Only callable by the admin.
     */
    function toggleOnchain() external onlyAdmin {
        bool onChain = !isOnchain;
        isOnchain = onChain;
    }

    /**
     *  @notice Get a boolean value whether the index was used for burn minting or not.
     *  @return True or false.
     */
    function getBurnMintIsdone() external view returns (bool) {
        return burnMintStructs[burnMintIndex].isDone;
    }

    /**
     *  @notice Get the number of burn mint set for an address.
     *  @param _address The address to be set in numberOfBurnMintByAddress.
     *  @return The number of burn mint set at the address.
     */
    function getBurnMintCount(address _address)
        external
        view
        returns (uint256)
    {
        return
            burnMintStructs[burnMintIndex].numberOfBurnMintByAddress[_address];
    }
}

File 4 of 10 : CouponSet.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;

/**
 *  @title Coupon set methods specified address.
 *  @notice Contains the methods necessary to authenticate the coupon.
 */
library CouponSet {
    // The coupon struct generated by the signing process off-chain
    struct Coupon {
        bytes32 r;
        bytes32 s;
        uint8 v;
    }

    // The coupon type
    enum CouponType {
        Presale,
        BurnMint
    }

    /**
     *  @notice Check if the coupon you were given is the correct one.
     *  @dev Use the ecrecover function to recover the public address and check if it is the same as the address set on the contract side.
     *  @param _coupon Coupon for verifying the signer.
     *  @param _couponType The coupon type used by _createDigest.
     *  @param _allotted The total number of tokens that can be claimed by miners used in _createDigest.
     *  @param _index Index of coupon used in _createDigest.
     *  @param _adminSigner Address of adminSigner.
     *  @return True or false.
     */
    function _isVerifiedCoupon(
        Coupon memory _coupon,
        CouponType _couponType,
        uint256 _allotted,
        uint256 _index,
        address _adminSigner
    ) internal view returns (bool) {
        bytes32 digest = _createDigest(_couponType, _allotted, _index);
        address signer = ecrecover(digest, _coupon.v, _coupon.r, _coupon.s);
        require(signer != address(0), "ECDSA: invalid signature");
        return signer == _adminSigner;
    }

    /**
     *  @notice Creates the encrypted data needed to authenticate the coupon.
     *  @dev Create a 32-byte hash from the coupon type, the total number that can be requested, and the sender's address.
     *  @param _couponType The coupon type(Presale or BurnMint).
     *  @param _allotted The total number of tokens the minter is allowed to claim.
     *  @param _index Index of coupon.
     *  @return A 32-byte hash created from the coupon type, the total number of coupons that can be requested, and the sender's address.
     */
    function _createDigest(
        CouponType _couponType,
        uint256 _allotted,
        uint256 _index
    ) internal view returns (bytes32) {
        return
            keccak256(abi.encode(_couponType, _allotted, _index, msg.sender));
    }
}

File 5 of 10 : CNPRdescriptor.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;

import "../interface/ICNPRdescriptor.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";

/**
 *  @title CnprDescriptor contract for CNPR tokenURI.
 *  @dev Ensure that when gas prices become lower in the future, they can be easily transitioned to on-chain.
 */
contract CNPRdescriptor is ICNPRdescriptor, Ownable {
    // The baseURI of metadata
    string public baseURI;

    // The Extension of URI
    string public baseExtension = ".json";

    /**
     *  @notice Given a token ID, construct a token URI for the CNPR.
     *  @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     *  @param _tokenId The token id.
     */
    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override
        returns (string memory)
    {
        return dataURI(_tokenId);
    }

    /**
     *  @notice Given a token ID , construct a data URI for the CNPR.
     *  @param _tokenId The token id.
     *  @return The data URI for CNPR.
     */
    function dataURI(uint256 _tokenId) public view returns (string memory) {
        return string(abi.encodePacked(_tokenURI(_tokenId), baseExtension));
    }

    /**
     *  @dev Return the token URI.
     *  @param _tokenId The token id.
     *  @return The token URI for CNPR.
     */
    function _tokenURI(uint256 _tokenId) internal view returns (string memory) {
        string memory baseURI_ = _baseURI();
        return
            bytes(baseURI_).length != 0
                ? string(abi.encodePacked(baseURI_, _toString(_tokenId)))
                : "";
    }

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

    /**
     *  @dev Converts a uint256 to its ASCII string decimal representation.
     */
    function _toString(uint256 value)
        internal
        pure
        virtual
        returns (string memory ptr)
    {
        assembly {
            // The maximum value of a uint256 contains 78 digits (1 byte per digit),
            // but we allocate 128 bytes to keep the free memory pointer 32-byte word aliged.
            // We will need 1 32-byte word to store the length,
            // and 3 32-byte words to store a maximum of 78 digits. Total: 32 + 3 * 32 = 128.
            ptr := add(mload(0x40), 128)
            // Update the free memory pointer to allocate.
            mstore(0x40, ptr)

            // Cache the end of the memory to calculate the length later.
            let end := ptr

            // We write the string from the rightmost digit to the leftmost digit.
            // The following is essentially a do-while loop that also handles the zero case.
            // Costs a bit more than early returning for the zero case,
            // but cheaper in terms of deployment and overall runtime costs.
            for {
                // Initialize and perform the first pass without check.
                let temp := value
                // Move the pointer 1 byte leftwards to point to an empty character slot.
                ptr := sub(ptr, 1)
                // Write the character to the pointer.
                // The ASCII index of the '0' character is 48.
                mstore8(ptr, add(48, mod(temp, 10)))
                temp := div(temp, 10)
            } temp {
                // Keep dividing `temp` until zero.
                temp := div(temp, 10)
            } {
                // Body of the for loop.
                ptr := sub(ptr, 1)
                mstore8(ptr, add(48, mod(temp, 10)))
            }

            let length := sub(end, ptr)
            // Move the pointer 32 bytes leftwards to make room for the length.
            ptr := sub(ptr, 32)
            // Store the length.
            mstore(ptr, length)
        }
    }

    /**
     *  @notice Set the base URI for all token IDs.
     *  @dev Only callable by the owner.
     *  @param baseURI_ The baseURI of the token.
     */
    function setBaseURI(string memory baseURI_) external onlyOwner {
        baseURI = baseURI_;
    }

    /**
     *  @notice Set the base URI extension for all token IDs.
     *  @dev Only callable by the owner.
     *  @param _baseExtension The base extension of the token.
     */
    function setBaseExtension(string memory _baseExtension) external onlyOwner {
        baseExtension = _baseExtension;
    }
}

File 6 of 10 : IERC721A.sol
// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.2.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

/**
 * @dev Interface of ERC721A.
 */
interface IERC721A {
    /**
     * The caller must own the token or be an approved operator.
     */
    error ApprovalCallerNotOwnerNorApproved();

    /**
     * The token does not exist.
     */
    error ApprovalQueryForNonexistentToken();

    /**
     * The caller cannot approve to their own address.
     */
    error ApproveToCaller();

    /**
     * Cannot query the balance for the zero address.
     */
    error BalanceQueryForZeroAddress();

    /**
     * Cannot mint to the zero address.
     */
    error MintToZeroAddress();

    /**
     * The quantity of tokens minted must be more than zero.
     */
    error MintZeroQuantity();

    /**
     * The token does not exist.
     */
    error OwnerQueryForNonexistentToken();

    /**
     * The caller must own the token or be an approved operator.
     */
    error TransferCallerNotOwnerNorApproved();

    /**
     * The token must be owned by `from`.
     */
    error TransferFromIncorrectOwner();

    /**
     * Cannot safely transfer to a contract that does not implement the
     * ERC721Receiver interface.
     */
    error TransferToNonERC721ReceiverImplementer();

    /**
     * Cannot transfer to the zero address.
     */
    error TransferToZeroAddress();

    /**
     * The token does not exist.
     */
    error URIQueryForNonexistentToken();

    /**
     * The `quantity` minted with ERC2309 exceeds the safety limit.
     */
    error MintERC2309QuantityExceedsLimit();

    /**
     * The `extraData` cannot be set on an unintialized ownership slot.
     */
    error OwnershipNotInitializedForExtraData();

    // =============================================================
    //                            STRUCTS
    // =============================================================

    struct TokenOwnership {
        // The address of the owner.
        address addr;
        // Stores the start time of ownership with minimal overhead for tokenomics.
        uint64 startTimestamp;
        // Whether the token has been burned.
        bool burned;
        // Arbitrary data similar to `startTimestamp` that can be set via {_extraData}.
        uint24 extraData;
    }

    // =============================================================
    //                         TOKEN COUNTERS
    // =============================================================

    /**
     * @dev Returns the total number of tokens in existence.
     * Burned tokens will reduce the count.
     * To get the total number of tokens minted, please see {_totalMinted}.
     */
    function totalSupply() external view returns (uint256);

    // =============================================================
    //                            IERC165
    // =============================================================

    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);

    // =============================================================
    //                            IERC721
    // =============================================================

    /**
     * @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,
        bytes calldata data
    ) external;

    /**
     * @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

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

    /**
     * @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);

    // =============================================================
    //                        IERC721Metadata
    // =============================================================

    /**
     * @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);

    // =============================================================
    //                           IERC2309
    // =============================================================

    /**
     * @dev Emitted when tokens in `fromTokenId` to `toTokenId`
     * (inclusive) is transferred from `from` to `to`, as defined in the
     * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309) standard.
     *
     * See {_mintERC2309} for more details.
     */
    event ConsecutiveTransfer(uint256 indexed fromTokenId, uint256 toTokenId, address indexed from, address indexed to);
}

File 7 of 10 : CNPRcore.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import "./interface/ICNPRdescriptor.sol";

/**
 *  @title Core abstract contract for CNPR.
 *  @dev Basic variables and other information are provided.
 */
abstract contract CNPRcore is Ownable {
    // Burn mint struct
    struct BurnMintStruct {
        bool isDone;
        mapping(address => uint256) numberOfBurnMintByAddress;
    }

    // Sale phase enum
    enum SalePhase {
        Locked,
        PreSale,
        BurnMint
    }

    // The CNPR token URI descriptor
    ICNPRdescriptor public descriptor;

    // Phase management
    SalePhase public phase = SalePhase.Locked;

    // Address of withdraw
    address public constant WITHDRAW_ADDRESS =
        0x7dDeE8b16F3F36cFb51De9dE2173dfD522909fb1;

    // Address of adminSigner
    address public adminSigner;

    // Address of admin
    address public admin;

    // The baseURI of metadata
    string public baseURI;

    // The Extension of URI
    string public baseExtension = ".json";

    // Maximum number of CNPR tokens can be minted
    uint256 public constant MAX_SUPPLY = 7777;

    // The CNPR token mint cost
    uint256 public constant MINT_COST = 0.001 ether;

    // Maximum number of BurnMint that can be done
    uint256 public maxBurnMintSupply = 2222;

    // Burn mint cost
    uint256 public burnMintCost = 0.001 ether;

    // Presale mint index
    uint256 public presaleMintIndex;

    // Burn mint index
    uint256 public burnMintIndex;

    // The bool switching to on-chain
    bool public isOnchain;

    // The mapping presale mint count
    mapping(address => uint256) public presaleMintCount;

    // The burn mint struct (index => BurnMintStruct)
    mapping(uint256 => BurnMintStruct) public burnMintStructs;
}

File 8 of 10 : ICNPRdescriptor.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;

interface ICNPRdescriptor {
    function tokenURI(uint256 _tokenId) external view returns (string memory);
}

File 9 of 10 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

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

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

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

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

File 10 of 10 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 800
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

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ICNPRdescriptor","name":"_descriptor","type":"address"}],"name":"setCnprDescriptor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"setMaxBurnMintSupply","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"enum 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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000004754ad911d3a3496bb3f6717ccff003e6eb3cf9d

-----Decoded View---------------
Arg [0] : _adminSigner (address): 0x4754AD911d3A3496bb3F6717CcfF003e6eB3cf9d

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000004754ad911d3a3496bb3f6717ccff003e6eb3cf9d


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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.