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// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.6;

import "@openzeppelin/contracts/utils/Pausable.sol";
import "./interfaces/IAsteroidToken.sol";


/**
 * @dev Allows the owner of an asteroid to set a name for it that will be included in ERC721 metadata
 */
contract AsteroidNames is Pausable {
  IAsteroidToken token;

  mapping (uint => string) private _asteroidNames;
  mapping (string => bool) private _usedNames;

  event NameChanged (uint indexed asteroidId, string newName);

  constructor(IAsteroidToken _token) {
    token = _token;
  }

  /**
   * @dev Change the name of the asteroid
   */
  function setName(uint _asteroidId, string memory _newName) external whenNotPaused {
    require(_msgSender() == token.ownerOf(_asteroidId), "ERC721: caller is not the owner");
    require(validateName(_newName) == true, "Invalid name");
    require(isNameUsed(_newName) == false, "Name already in use");

    // If already named, dereserve old name
    if (bytes(_asteroidNames[_asteroidId]).length > 0) {
      toggleNameUsed(_asteroidNames[_asteroidId], false);
    }

    toggleNameUsed(_newName, true);
    _asteroidNames[_asteroidId] = _newName;
    emit NameChanged(_asteroidId, _newName);
  }

  /**
   * @dev Retrieves the name of a given asteroid
   */
  function getName(uint _asteroidId) public view returns (string memory) {
    return _asteroidNames[_asteroidId];
  }

  /**
   * @dev Returns if the name is in use.
   */
  function isNameUsed(string memory nameString) public view returns (bool) {
    return _usedNames[toLower(nameString)];
  }

  /**
   * @dev Marks the name as used or unused
   */
  function toggleNameUsed(string memory str, bool isUsed) internal {
    _usedNames[toLower(str)] = isUsed;
  }

  /**
   * @dev Check if the name string is valid
   * Between 1 and 32 characters (Alphanumeric and spaces without leading or trailing space)
   */
  function validateName(string memory str) public pure returns (bool){
    bytes memory b = bytes(str);

    if(b.length < 1) return false;
    if(b.length > 32) return false; // Cannot be longer than 25 characters
    if(b[0] == 0x20) return false; // Leading space
    if (b[b.length - 1] == 0x20) return false; // Trailing space

    bytes1 lastChar = b[0];

    for (uint i; i < b.length; i++) {
      bytes1 char = b[i];

      if (char == 0x20 && lastChar == 0x20) return false; // Cannot contain continous spaces

      if (
        !(char >= 0x30 && char <= 0x39) && //9-0
        !(char >= 0x41 && char <= 0x5A) && //A-Z
        !(char >= 0x61 && char <= 0x7A) && //a-z
        !(char == 0x20) //space
      ) {
        return false;
      }

      lastChar = char;
    }

    return true;
  }

  /**
   * @dev Converts the string to lowercase
   */
  function toLower(string memory str) public pure returns (string memory){
    bytes memory bStr = bytes(str);
    bytes memory bLower = new bytes(bStr.length);

    for (uint i = 0; i < bStr.length; i++) {
      // Uppercase character
      if ((uint8(bStr[i]) >= 65) && (uint8(bStr[i]) <= 90)) {
        bLower[i] = bytes1(uint8(bStr[i]) + 32);
      } else {
        bLower[i] = bStr[i];
      }
    }

    return string(bLower);
  }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.6;

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";


interface IAsteroidToken is IERC721 {
  function addManager(address _manager) external;

  function removeManager(address _manager) external;

  function isManager(address _manager) external view returns (bool);

  function mint(address _to, uint256 _tokenId) external;

  function burn(address _owner, uint256 _tokenId) external;
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <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 >=0.6.2 <0.8.0;

import "../../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 >=0.6.0 <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 GSN 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 payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./Context.sol";

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

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

    bool private _paused;

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

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

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

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

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

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

{
  "remappings": [],
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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0000000000000000000000006e4c6d9b0930073e958abd2aba516b885260b8ff

-----Decoded View---------------
Arg [0] : _token (address): 0x6e4c6D9B0930073e958ABd2ABa516b885260b8Ff

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000006e4c6d9b0930073e958abd2aba516b885260b8ff