CrypTards NFT

// 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);
            }
        }
    }
}

// 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;
    }
}

/***
 *     ██████╗██████╗ ██╗   ██╗██████╗         
 *    ██╔════╝██╔══██╗╚██╗ ██╔╝██╔══██╗        
 *    ██║     ██████╔╝ ╚████╔╝ ██████╔╝█████╗  
 *    ██║     ██╔══██╗  ╚██╔╝  ██╔═══╝ ╚════╝  
 *    ╚██████╗██║  ██║   ██║   ██║             
 *     ╚═════╝╚═╝  ╚═╝   ╚═╝   ╚═╝             
 *                                             
 *    ████████╗ █████╗ ██████╗ ██████╗ ███████╗
 *    ╚══██╔══╝██╔══██╗██╔══██╗██╔══██╗██╔════╝
 *       ██║   ███████║██████╔╝██║  ██║███████╗
 *       ██║   ██╔══██║██╔══██╗██║  ██║╚════██║
 *       ██║   ██║  ██║██║  ██║██████╔╝███████║
 *       ╚═╝   ╚═╝  ╚═╝╚═╝  ╚═╝╚═════╝ ╚══════╝
 *                                             
 * A G & M Mints project!
 * Written by MaxflowO2, Senior Developer of G & M Mints
 * Get ahold of us on Discord, https://discord.gg/njynqxEU49
 * Follow me on https://github.com/MaxflowO2
 * email: cryptobymaxflowO2@gmail.com
 *
 * Project-name: cryp-tards
 * Network-Deployment: Ethereum (chain ID 1)
 * Website: https://www.CrypTards.com/
 *
 */

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.9.0;

/***
 *    ██╗███╗   ███╗██████╗  ██████╗ ██████╗ ████████╗███████╗
 *    ██║████╗ ████║██╔══██╗██╔═══██╗██╔══██╗╚══██╔══╝██╔════╝
 *    ██║██╔████╔██║██████╔╝██║   ██║██████╔╝   ██║   ███████╗
 *    ██║██║╚██╔╝██║██╔═══╝ ██║   ██║██╔══██╗   ██║   ╚════██║
 *    ██║██║ ╚═╝ ██║██║     ╚██████╔╝██║  ██║   ██║   ███████║
 *    ╚═╝╚═╝     ╚═╝╚═╝      ╚═════╝ ╚═╝  ╚═╝   ╚═╝   ╚══════╝
 */

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";
import "./IERC2981.sol";

contract CrypTards is ERC721, ERC721Enumerable, ERC721URIStorage, Ownable, IERC2981, ERC165Storage {

/***
 *     ██████╗ ██╗      ██████╗ ██████╗  █████╗ ██╗     ███████╗
 *    ██╔════╝ ██║     ██╔═══██╗██╔══██╗██╔══██╗██║     ██╔════╝
 *    ██║  ███╗██║     ██║   ██║██████╔╝███████║██║     ███████╗
 *    ██║   ██║██║     ██║   ██║██╔══██╗██╔══██║██║     ╚════██║
 *    ╚██████╔╝███████╗╚██████╔╝██████╔╝██║  ██║███████╗███████║
 *     ╚═════╝ ╚══════╝ ╚═════╝ ╚═════╝ ╚═╝  ╚═╝╚══════╝╚══════╝
 */

  uint256 public tokenCounter;
  uint256 public mintFee;
  uint256 public maxMint;
  uint256 public royaltyFee;
  uint256 public teamMintCount;
  uint256 public teamMintMax;
  uint256 public whiteListEnd;
  address public royaltyAddress;
  address public devAddress;
  address private gandmPaymentOne;
  address private gandmPaymentTwo;
  address private gandmPaymentThree;
  address private gandmPaymentFour;
  address private crypTardsOne;
  address private crypTardsTwo;
  bool public enableMinter;
  bool public enableWhiteList;
  string private directory;
  mapping (address => bool) public isWhiteList;

  event NewMaxMintCount(uint256 newMaxMint);
  event NewRoyaltyFee(uint256 newPercentage);
  event NewRoyaltyAddress(address newRoyaltyAddress);
  event NewMintFee(uint256 newMintFee);
  event NewWhitelistCount(uint256 newWhiteListEnd);
  event MinterStatusUpdate(bool newEnableMinter);
  event MinterStatusWhitelist(bool newEnableWhitesale);
  event NewTeamMintQuantity(uint256 newTeamMintMax);
  event NewTeamMint(uint256 newID, uint256 TeamMintCount);
  event DevUpdateDirectory(string newDirectory);
  event DevUpdateTokenURI(uint256 ID, string newTokenURI);
  event DevAddressChanged(address newDevAddress);
  event WhitelistChange(address whiteListAddy, bool update);

/***
 *    ███████╗██████╗  ██████╗     ██╗ ██████╗ ███████╗
 *    ██╔════╝██╔══██╗██╔════╝    ███║██╔════╝ ██╔════╝
 *    █████╗  ██████╔╝██║         ╚██║███████╗ ███████╗
 *    ██╔══╝  ██╔══██╗██║          ██║██╔═══██╗╚════██║
 *    ███████╗██║  ██║╚██████╗     ██║╚██████╔╝███████║
 *    ╚══════╝╚═╝  ╚═╝ ╚═════╝     ╚═╝ ╚═════╝ ╚══════╝
 *  Do not modify, do not edit, period
 */

  bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;
  bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;
  bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;
  bytes4 private constant _INTERFACE_ID_ERC2981 = 0x2a55205a;

  constructor() ERC721("CrypTards", "TARDS") {
    // init of all variables
    tokenCounter = 0;
    mintFee = 69 * 10**15; // .069 ETH
    maxMint = 10000; // Total Amount
    royaltyFee = 5; // as a percentage
    teamMintCount = 0;
    teamMintMax = 50;
    whiteListEnd = 200;
    royaltyAddress = 0xC1C857631a1A0E3f55AC183E8AbF8209b60DBff9;
    devAddress = msg.sender;
    gandmPaymentOne = 0x4CE69fd760AD0c07490178f9a47863Dc0358cCCD;
    gandmPaymentTwo = 0x78Da8DE0d89cF141a931E32f1f903E75646014f9;
    gandmPaymentThree = 0x9307CAA51A02177C26D666E628A156A5bD8931bb;
    gandmPaymentFour = 0xfaFf57D52717eE9b886859679B371cC3046f2E9F;
    crypTardsOne = 0x3C2d2104A7A660868D7a853f7961E12593a75d46;
    crypTardsTwo = 0x9EB6d7624243947143C0fE4dFCC2DEBacEc6A17E;
    enableMinter = false;
    enableWhiteList = false;
    directory = "QmZ4eEo9dEMFE6wg6EmLT5p1epBATJzX8AnXNBAmpXtTrR/";

    // ECR165 Interfaces Supported

    // ERC721 interface
    _registerInterface(_INTERFACE_ID_ERC721);
    _registerInterface(_INTERFACE_ID_ERC721_METADATA);
    _registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);

    // Royalties interface
    _registerInterface(_INTERFACE_ID_ERC2981);

  }

  /***
   *     ██████╗██╗   ██╗███████╗████████╗ ██████╗ ███╗   ███╗                    
   *    ██╔════╝██║   ██║██╔════╝╚══██╔══╝██╔═══██╗████╗ ████║                    
   *    ██║     ██║   ██║███████╗   ██║   ██║   ██║██╔████╔██║                    
   *    ██║     ██║   ██║╚════██║   ██║   ██║   ██║██║╚██╔╝██║                    
   *    ╚██████╗╚██████╔╝███████║   ██║   ╚██████╔╝██║ ╚═╝ ██║                    
   *     ╚═════╝ ╚═════╝ ╚══════╝   ╚═╝    ╚═════╝ ╚═╝     ╚═╝                    
   */

  function addWhitelistBatch(address [] memory _addresses) public onlyOwner {
    for (uint i = 0; i < _addresses.length; i++) {
      isWhiteList[_addresses[i]] = true;
      emit WhitelistChange(_addresses[i], isWhiteList[_addresses[i]]);
    }
  }

  function addWhitelist(address _address) public onlyOwner {
    isWhiteList[_address] = true;
    emit WhitelistChange(_address, isWhiteList[_address]);
  }

  function disableMinting() public onlyOwner {
    enableMinter = false;
    emit MinterStatusUpdate(enableMinter);
  }

  function disableWhitelist() public onlyOwner {
    enableWhiteList = false;
    emit MinterStatusWhitelist(enableWhiteList);
    whiteListEnd = 0;
    emit NewWhitelistCount(whiteListEnd);
  }

  function enableMinting() public onlyOwner {
    enableMinter = true;
    emit MinterStatusUpdate(enableMinter);
    enableWhiteList = true;
    emit MinterStatusWhitelist(enableWhiteList);
  }

  function enableWhitelist() public onlyOwner {
    enableWhiteList = true;
    emit MinterStatusWhitelist(enableWhiteList);
  }

  function removeWhitelistBatch(address [] memory _addresses) public onlyOwner {
    for (uint i = 0; i < _addresses.length; i++) {
      isWhiteList[_addresses[i]] = false;
      emit WhitelistChange(_addresses[i], isWhiteList[_addresses[i]]);
    }
  }

  function removeWhitelist(address _address) public onlyOwner {
    isWhiteList[_address] = false;
    emit WhitelistChange(_address, isWhiteList[_address]);
  }

  function setMaxMinted(uint256 _maxMint) public onlyOwner {
    maxMint = _maxMint;
    emit NewMaxMintCount(maxMint);
  }

  function setMintFee(uint256 _mintFee) public onlyOwner {
    // set to 0.001 ETH
    mintFee = _mintFee * 10**15;
    emit NewMintFee(mintFee);
  }

  function setPaymentAddresses(address _fifty, address _thirty) public onlyOwner {
    crypTardsOne = _fifty;
    crypTardsTwo = _thirty;
  }

  function setRoyaltyAddress(address _address) public onlyOwner {
    royaltyAddress = _address;
    emit NewRoyaltyAddress(royaltyAddress);
  }

  function setRoyaltyPercentage(uint256 _percentage) public onlyOwner {
    royaltyFee = _percentage;
    emit NewRoyaltyFee(royaltyFee);
  }

  function setTeamMintMaximum(uint256 _number) public onlyOwner {
    teamMintMax = _number;
    emit NewTeamMintQuantity(teamMintMax);
  }

  function setWhitelistEnd(uint256 _count) public onlyOwner {
    whiteListEnd = _count;
    emit NewWhitelistCount(whiteListEnd);
  }

  function _baseURI() internal view override returns (string memory) {
    string memory ipfs = "https://ipfs.io/ipfs/";
    return string(abi.encodePacked(ipfs, directory));
  }

  function publicMint() public payable {
    if(enableWhiteList) {
      require(isWhiteList[msg.sender]);
      require(enableMinter);
      require(msg.value == mintFee);
      require(tokenCounter < maxMint);
      paymentSplitter(mintFee);
      _mint(msg.sender, tokenCounter);
      _setTokenURI(tokenCounter, _endOfURI(tokenCounter));
      tokenCounter++;
      if(tokenCounter >= whiteListEnd) {
        enableWhiteList = false;
        emit MinterStatusWhitelist(enableWhiteList);
      }
    } else {
      require(enableMinter);
      require(msg.value == mintFee);
      require(tokenCounter < maxMint);
      paymentSplitter(mintFee);
      _mint(msg.sender, tokenCounter);
      _setTokenURI(tokenCounter, _endOfURI(tokenCounter));
      tokenCounter++;
    }
  }

  function teamMint(address _address) public onlyOwner {
    require(enableMinter);
    require(tokenCounter >= whiteListEnd);
    require(teamMintCount < teamMintMax);
    require(tokenCounter < maxMint);
    _mint(_address, tokenCounter);
    _setTokenURI(tokenCounter, _endOfURI(tokenCounter));
    uint256 theID = tokenCounter;
    tokenCounter++;
    teamMintCount++;
    emit NewTeamMint(theID, teamMintCount);
  }

  // Function to receive Ether. msg.data must be empty
  receive() external payable {}

  // Fallback function is called when msg.data is not empty
  fallback() external payable {}

  function getBalance() external view returns (uint) {
    return address(this).balance;
  }

  // Payment splitter
  function paymentSplitter(uint256 _amount) internal {
    uint256 Half = _amount / 2; // 50%
    uint256 Thirty = _amount * 3 / 10; // 30%
    uint256 GandMMints = _amount / 20; // 5% - each
    payable(gandmPaymentOne).transfer(GandMMints);
    payable(gandmPaymentTwo).transfer(GandMMints);
    payable(gandmPaymentThree).transfer(GandMMints);
    payable(gandmPaymentFour).transfer(GandMMints);
    payable(crypTardsOne).transfer(Half);
    payable(crypTardsTwo).transfer(Thirty);
  }

  // turns uint to string
  function _uint2str(uint256 _i) internal pure returns (string memory str) {
    if (_i == 0) {
      return "0";
    }
    uint256 j = _i;
    uint256 length;
    while (j != 0) {
      length++;
      j /= 10;
    }
    bytes memory bstr = new bytes(length);
    uint256 k = length;
    j = _i;
    while (j != 0) {
      bstr[--k] = bytes1(uint8(48 + j % 10));
      j /= 10;
    }
    str = string(bstr);
  }

  // solidity string concatenation
  function _endOfURI(uint256 _i) internal pure returns (string memory jsonString) {
    string memory theNumber = _uint2str(_i);
    string memory dotJson = ".json";
    jsonString = string(abi.encodePacked(theNumber, dotJson));
  }

  /***
   *    ██╗███╗   ██╗████████╗███████╗██████╗ ███████╗ █████╗  ██████╗███████╗
   *    ██║████╗  ██║╚══██╔══╝██╔════╝██╔══██╗██╔════╝██╔══██╗██╔════╝██╔════╝
   *    ██║██╔██╗ ██║   ██║   █████╗  ██████╔╝█████╗  ███████║██║     █████╗
   *    ██║██║╚██╗██║   ██║   ██╔══╝  ██╔══██╗██╔══╝  ██╔══██║██║     ██╔══╝
   *    ██║██║ ╚████║   ██║   ███████╗██║  ██║██║     ██║  ██║╚██████╗███████╗
   *    ╚═╝╚═╝  ╚═══╝   ╚═╝   ╚══════╝╚═╝  ╚═╝╚═╝     ╚═╝  ╚═╝ ╚═════╝╚══════╝
   */

  function intTokenCounter() external view returns (uint256) {
    return tokenCounter;
  }

  function intMaxMint() external view returns (uint256) {
    return maxMint;
  }

  function intMintFee() external view returns (uint256) {
    return mintFee;
  }

  function intEnableMinter() external view returns (bool) {
    return enableMinter;
  }

  /***
   *     ██████╗ ██╗   ██╗███████╗██████╗ ██████╗ ██╗██████╗ ███████╗███████╗
   *    ██╔═══██╗██║   ██║██╔════╝██╔══██╗██╔══██╗██║██╔══██╗██╔════╝██╔════╝
   *    ██║   ██║██║   ██║█████╗  ██████╔╝██████╔╝██║██║  ██║█████╗  ███████╗
   *    ██║   ██║╚██╗ ██╔╝██╔══╝  ██╔══██╗██╔══██╗██║██║  ██║██╔══╝  ╚════██║
   *    ╚██████╔╝ ╚████╔╝ ███████╗██║  ██║██║  ██║██║██████╔╝███████╗███████║
   *     ╚═════╝   ╚═══╝  ╚══════╝╚═╝  ╚═╝╚═╝  ╚═╝╚═╝╚═════╝ ╚══════╝╚══════╝
   */

  function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal override(ERC721, ERC721Enumerable) {
    super._beforeTokenTransfer(from, to, tokenId);
  }

  function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) {
    super._burn(tokenId);
  }

  function tokenURI(uint256 tokenId) public view override(ERC721, ERC721URIStorage) returns (string memory) {
    return super.tokenURI(tokenId);
  }

  function royaltyInfo(uint256 _tokenId, uint256 _salePrice) external view override(IERC2981) returns (address receiver, uint256 royaltyAmount) {
    receiver = royaltyAddress;
    royaltyAmount = _salePrice*royaltyFee/100;
  }

  function supportsInterface(bytes4 interfaceId) public view override(ERC721, ERC721Enumerable, ERC165Storage, IERC165) returns (bool) {
    return super.supportsInterface(interfaceId);
  }

/***
 *     ██████╗ ███╗   ██╗██╗  ██╗   ██╗██████╗ ███████╗██╗   ██╗
 *    ██╔═══██╗████╗  ██║██║  ╚██╗ ██╔╝██╔══██╗██╔════╝██║   ██║
 *    ██║   ██║██╔██╗ ██║██║   ╚████╔╝ ██║  ██║█████╗  ██║   ██║
 *    ██║   ██║██║╚██╗██║██║    ╚██╔╝  ██║  ██║██╔══╝  ╚██╗ ██╔╝
 *    ╚██████╔╝██║ ╚████║███████╗██║   ██████╔╝███████╗ ╚████╔╝ 
 *     ╚═════╝ ╚═╝  ╚═══╝╚══════╝╚═╝   ╚═════╝ ╚══════╝  ╚═══╝  
 */

  // @Dev this is the modifier
  modifier onlyDev {
    require(msg.sender == devAddress);
    _;
  }

  // @Dev can renounce onlyDev functions, leaving onlyDev functions uncallable
  function RenounceDeveloper() public onlyDev {
    devAddress = address(0);
    emit DevAddressChanged(devAddress);
  }

  // @Dev can transfer onlyDev functions to another address
  function TransferDeveloper(address _nextDev) public onlyDev {
    devAddress = _nextDev;
    emit DevAddressChanged(devAddress);
  }

  // @Dev can set the Directory of JSONS
  function devSetDirectory(string memory _directory) public onlyDev {
    directory = _directory;
    emit DevUpdateDirectory(directory);
  }

  // @Dev can fix a TokenURI of a mismint  
  function devSetTokenURI(uint256 id, string memory dotJson) public onlyDev {
    _setTokenURI(id, dotJson);
    emit DevUpdateTokenURI(id, dotJson);
  }

  // @Dev can update GandM payments
  function devSetPayments(address _one, address _two, address _three, address _four) public onlyDev {
    gandmPaymentOne = _one;
    gandmPaymentTwo = _two;
    gandmPaymentThree = _three;
    gandmPaymentFour = _four;
  }

  // @Dev function useful for accidental ETH transfers to contract (to user address)
  // wraps _user in payable to fix address -> address payable
  function sweepEthToAddress(address _user, uint256 _amount) public onlyDev {
    payable(_user).transfer(_amount);
  }

  // @Dev function useful for accidental ERC20 tokens of any type,
  // transferred to contract (to user address). Calls any ERC20 tokens by address,
  // and transfers via IERC20.transfer.
  function sweepAnyTokensToAddress(address _token, address _user) public onlyDev {
    IERC20(_token).transfer(_user, IERC20(_token).balanceOf(address(this)));
  }
}

// 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;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./ERC165.sol";

/**
 * @dev Storage based implementation of the {IERC165} interface.
 *
 * Contracts may inherit from this and call {_registerInterface} to declare
 * their support of an interface.
 */
abstract contract ERC165Storage is ERC165 {
    /**
     * @dev Mapping of interface ids to whether or not it's supported.
     */
    mapping(bytes4 => bool) private _supportedInterfaces;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return super.supportsInterface(interfaceId) || _supportedInterfaces[interfaceId];
    }

    /**
     * @dev Registers the contract as an implementer of the interface defined by
     * `interfaceId`. Support of the actual ERC165 interface is automatic and
     * registering its interface id is not required.
     *
     * See {IERC165-supportsInterface}.
     *
     * Requirements:
     *
     * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
     */
    function _registerInterface(bytes4 interfaceId) internal virtual {
        require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
        _supportedInterfaces[interfaceId] = true;
    }
}

// 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 {}
}

// 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();
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../ERC721.sol";

/**
 * @dev ERC721 token with storage based token URI management.
 */
abstract contract ERC721URIStorage is ERC721 {
    using Strings for uint256;

    // Optional mapping for token URIs
    mapping(uint256 => string) private _tokenURIs;

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");

        string memory _tokenURI = _tokenURIs[tokenId];
        string memory base = _baseURI();

        // If there is no base URI, return the token URI.
        if (bytes(base).length == 0) {
            return _tokenURI;
        }
        // If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
        if (bytes(_tokenURI).length > 0) {
            return string(abi.encodePacked(base, _tokenURI));
        }

        return super.tokenURI(tokenId);
    }

    /**
     * @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
        require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
        _tokenURIs[tokenId] = _tokenURI;
    }

    /**
     * @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 override {
        super._burn(tokenId);

        if (bytes(_tokenURIs[tokenId]).length != 0) {
            delete _tokenURIs[tokenId];
        }
    }
}

// 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);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

/***
 *    ███████╗██╗██████╗       ██████╗  █████╗  █████╗  ██╗
 *    ██╔════╝██║██╔══██╗      ╚════██╗██╔══██╗██╔══██╗███║
 *    █████╗  ██║██████╔╝█████╗ █████╔╝╚██████║╚█████╔╝╚██║
 *    ██╔══╝  ██║██╔═══╝ ╚════╝██╔═══╝  ╚═══██║██╔══██╗ ██║
 *    ███████╗██║██║           ███████╗ █████╔╝╚█████╔╝ ██║
 *    ╚══════╝╚═╝╚═╝           ╚══════╝ ╚════╝  ╚════╝  ╚═╝                                                        
 * Zach Burks, James Morgan, Blaine Malone, James Seibel,
 * "EIP-2981: NFT Royalty Standard,"
 * Ethereum Improvement Proposals, no. 2981, September 2020. [Online serial].
 * Available: https://eips.ethereum.org/EIPS/eip-2981.
 */

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;
import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

///
/// @dev Interface for the NFT Royalty Standard
///
interface IERC2981 is IERC165 {
    /// ERC165 bytes to add to interface array - set in parent contract
    /// implementing this standard
    ///
    /// bytes4(keccak256("royaltyInfo(uint256,uint256)")) == 0x2a55205a
    /// bytes4 private constant _INTERFACE_ID_ERC2981 = 0x2a55205a;
    /// _registerInterface(_INTERFACE_ID_ERC2981);

    /// @notice Called with the sale price to determine how much royalty
    //          is owed and to whom.
    /// @param _tokenId - the NFT asset queried for royalty information
    /// @param _salePrice - the sale price of the NFT asset specified by _tokenId
    /// @return receiver - address of who should be sent the royalty payment
    /// @return royaltyAmount - the royalty payment amount for _salePrice
    function royaltyInfo(
        uint256 _tokenId,
        uint256 _salePrice
    ) external view returns (
        address receiver,
        uint256 royaltyAmount
    );
}

// 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;
}

// 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);
}

// 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);
}

// 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);
}

// 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);
    }
}

// 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);
    }
}

{
  "compilationTarget": {
    "CrypTards.sol": "CrypTards"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 50
  },
  "remappings": []
}