WRLD Name Service

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @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
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 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
// 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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

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
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/ERC721.sol)

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 overridden 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 {
        _setApprovalForAll(_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 || isApprovedForAll(owner, spender) || getApproved(tokenId) == 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);

        _afterTokenTransfer(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);

        _afterTokenTransfer(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 from incorrect owner");
        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);

        _afterTokenTransfer(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 Approve `operator` to operate on all of `owner` tokens
     *
     * Emits a {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @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 {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
        external
        view
        returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

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
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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);

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol)

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`.
     *
     * 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;

    /**
     * @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 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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

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
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

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 `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;

import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";

interface IWNS_Passes is IERC1155 {
  function burnTypeBulk(uint256 _typeId, address[] calldata owners) external;
  function burnTypeForOwnerAddress(uint256 _typeId, uint256 _quantity, address _typeOwnerAddress) external returns (bool);
  function mintTypeToAddress(uint256 _typeId, uint256 _quantity, address _toAddress) external returns (bool);
  function bulkSafeTransfer(uint256 _typeId, uint256 _quantityPerRecipient, address[] calldata recipients) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

interface IWRLD_Name_Service_Bridge is IERC165 {
  function transfer(address from, address to, uint256 tokenId, string memory name) external;
  function extendRegistration(string[] calldata _names, uint16[] calldata _additionalYears) external;
  function setController(string calldata _name, address _controller) external;

  function setStringRecord(string calldata _name, string calldata _record, string calldata _value, string calldata _typeOf, uint256 _ttl) external;
  function setAddressRecord(string memory _name, string memory _record, address _value, uint256 _ttl) external;
  function setUintRecord(string calldata _name, string calldata _record, uint256 _value, uint256 _ttl) external;
  function setIntRecord(string calldata _name, string calldata _record, int256 _value, uint256 _ttl) external;

  function setStringEntry(address _setter, string calldata _name, string calldata _entry, string calldata _value) external;
  function setAddressEntry(address _setter, string calldata _name, string calldata _entry, address _value) external;
  function setUintEntry(address _setter, string calldata _name, string calldata _entry, uint256 _value) external;
  function setIntEntry(address _setter, string calldata _name, string calldata _entry, int256 _value) external;

  function migrate(string calldata _name, uint256 _networkFlags) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

interface IWRLD_Name_Service_Metadata is IERC165 {
  function getMetadata(string memory _name, uint256 _expiresAt) external view returns (string memory);
  function getImage(string memory _name, uint256 _expiresAt) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

interface IWRLD_Name_Service_Registry is IERC165 {
  function register(address _registerer, string[] calldata _names, uint16[] memory _registrationYears) external;
  function extendRegistration(string[] calldata _names, uint16[] calldata _additionalYears) external;

  function getNameTokenId(string calldata _name) external view returns (uint256);

  event NameRegistered(string indexed idxName, string name, uint16 registrationYears);
  event NameRegistrationExtended(string indexed idxName, string name, uint16 additionalYears);
  event NameControllerUpdated(string indexed idxName, string name, address controller);

  event ResolverStringRecordUpdated(string indexed idxName, string name, string record, string value, string typeOf, uint256 ttl, address resolver);
  event ResolverAddressRecordUpdated(string indexed idxName, string name, string record, address value, uint256 ttl, address resolver);
  event ResolverUintRecordUpdated(string indexed idxName, string name, string record, uint256 value, uint256 ttl, address resolver);
  event ResolverIntRecordUpdated(string indexed idxName, string name, string record, int256 value, uint256 ttl, address resolver);

  event ResolverStringEntryUpdated(address indexed setter, string indexed idxName, string indexed idxEntry, string name, string entry, string value);
  event ResolverAddressEntryUpdated(address indexed setter, string indexed idxName, string indexed idxEntry, string name, string entry, address value);
  event ResolverUintEntryUpdated(address indexed setter, string indexed idxName, string indexed idxEntry, string name, string entry, uint256 value);
  event ResolverIntEntryUpdated(address indexed setter, string indexed idxName, string indexed idxEntry, string name, string entry, int256 value);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

import "./IWRLD_Records.sol";

interface IWRLD_Name_Service_Resolver is IERC165, IWRLD_Records {
  /***********
   * Records *
   ***********/

  function setStringRecord(string calldata _name, string calldata _record, string calldata _value, string calldata _typeOf, uint256 _ttl) external;
  function getNameStringRecord(string calldata _name, string calldata _record) external view returns (StringRecord memory);
  function getNameStringRecordsList(string calldata _name) external view returns (string[] memory);
  function getNameStringRecordsListPaginated(string calldata _name, uint256 _offset, uint256 _limit) external view returns (string[] memory);

  function setAddressRecord(string memory _name, string memory _record, address _value, uint256 _ttl) external;
  function getNameAddressRecord(string calldata _name, string calldata _record) external view returns (AddressRecord memory);
  function getNameAddressRecordsList(string calldata _name) external view returns (string[] memory);
  function getNameAddressRecordsListPaginated(string calldata _name, uint256 _offset, uint256 _limit) external view returns (string[] memory);

  function setUintRecord(string calldata _name, string calldata _record, uint256 _value, uint256 _ttl) external;
  function getNameUintRecord(string calldata _name, string calldata _record) external view returns (UintRecord memory);
  function getNameUintRecordsList(string calldata _name) external view returns (string[] memory);
  function getNameUintRecordsListPaginated(string calldata _name, uint256 _offset, uint256 _limit) external view returns (string[] memory);

  function setIntRecord(string calldata _name, string calldata _record, int256 _value, uint256 _ttl) external;
  function getNameIntRecord(string calldata _name, string calldata _record) external view returns (IntRecord memory);
  function getNameIntRecordsList(string calldata _name) external view returns (string[] memory);
  function getNameIntRecordsListPaginated(string calldata _name, uint256 _offset, uint256 _limit) external view returns (string[] memory);

  /***********
   * Entries *
   ***********/

  function setStringEntry(address _setter, string calldata _name, string calldata _entry, string calldata _value) external;
  function getStringEntry(address _setter, string calldata _name, string calldata _entry) external view returns (string memory);

  function setAddressEntry(address _setter, string calldata _name, string calldata _entry, address _value) external;
  function getAddressEntry(address _setter, string calldata _name, string calldata _entry) external view returns (address);

  function setUintEntry(address _setter, string calldata _name, string calldata _entry, uint256 _value) external;
  function getUintEntry(address _setter, string calldata _name, string calldata _entry) external view returns (uint256);

  function setIntEntry(address _setter, string calldata _name, string calldata _entry, int256 _value) external;
  function getIntEntry(address _setter, string calldata _name, string calldata _entry) external view returns (int256);

  /**********
   * Events *
   **********/

  event StringRecordUpdated(string indexed idxName, string name, string record, string value, string typeOf, uint256 ttl);
  event AddressRecordUpdated(string indexed idxName, string name, string record, address value, uint256 ttl);
  event UintRecordUpdated(string indexed idxName, string name, string record, uint256 value, uint256 ttl);
  event IntRecordUpdated(string indexed idxName, string name, string record, int256 value, uint256 ttl);

  event StringEntryUpdated(address indexed setter, string indexed idxName, string indexed idxEntry, string name, string entry, string value);
  event AddressEntryUpdated(address indexed setter, string indexed idxName, string indexed idxEntry, string name, string entry, address value);
  event UintEntryUpdated(address indexed setter, string indexed idxName, string indexed idxEntry, string name, string entry, uint256 value);
  event IntEntryUpdated(address indexed setter, string indexed idxName, string indexed idxEntry, string name, string entry, int256 value);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

interface IWRLD_Records {
  struct StringRecord {
    string value;
    string typeOf;
    uint256 ttl;
  }

  struct AddressRecord {
    address value;
    uint256 ttl;
  }

  struct UintRecord {
    uint256 value;
    uint256 ttl;
  }

  struct IntRecord {
    int256 value;
    uint256 ttl;
  }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 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 {
        _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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

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

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

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

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

        _;

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

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4;

library StringUtils {
    /**
     * @dev Returns the length of a given string
     *
     * @param s The string to measure the length of
     * @return The length of the input string
     */
    function strlen(string memory s) internal pure returns (uint256) {
        uint len;
        uint i = 0;
        uint bytelength = bytes(s).length;
        for (len = 0; i < bytelength; len++) {
            bytes1 b = bytes(s)[i];
            if (b < 0x80) {
                i += 1;
            } else if (b < 0xE0) {
                i += 2;
            } else if (b < 0xF0) {
                i += 3;
            } else if (b < 0xF8) {
                i += 4;
            } else if (b < 0xFC) {
                i += 5;
            } else {
                i += 6;
            }
        }
        return len;
    }

    /**
     * @dev Checks the string for RFC3986 reserved characters.
     *      Includes a few more extra chars for security. Specifically, percent encoding is not allowed.
     *
     * @param s The string to check
     * @return T/F
     */
    function validateUriCharset(string memory s) internal pure returns (bool) {
        uint len;
        uint i = 0;
        uint bytelength = bytes(s).length;
        bytes1 b0 = bytes(s)[0];
        if (b0==0x2d||b0==0x5f||b0==0x7e) {  // not allowed: - _ ~
            return false;
        }
        for (len = 0; i < bytelength; len++) {
            bytes1 b = bytes(s)[i];
            if (b < 0x80) {
                i += 1;
                if (b<0x2d||b==0x2e||b==0x2f||(b>=0x3a&&b<=0x40)||b==0x5b||b==0x5c||b==0x5d||b==0x5e||b==0x60||b==0x7b||b==0x7c||b==0x7d||b==0x7f) {
                    return false;
                }
            } else if (b < 0xE0) {
                i += 2;
            } else if (b < 0xF0) {
                i += 3;
            } else if (b < 0xF8) {
                i += 4;
            } else if (b < 0xFC) {
                i += 5;
            } else {
                i += 6;
            }
        }
        return true;
    }

    /**
     * @dev Apply UTS-46 normalization to a string. (implementation deviates from the standard)
     *
     * @param s The string to normalize
     * @return T/F
     */
    function UTS46Normalize(string memory s) internal pure returns (string memory) {
        uint len;
        uint i = 0;
        uint bytelength = bytes(s).length;
        bytes1 b0 = bytes(s)[0];

        if (b0==0x2d||b0==0x5f||b0==0x7e) {  // not allowed in first position: - _ ~
            revert("invalid charset");
        }
        for (len = 0; i < bytelength; len++) {
            bytes1 b = bytes(s)[i];
            if (b < 0x80) {
                if (b<0x2d||b==0x2e||b==0x2f||(b>=0x3a&&b<=0x40)||b==0x5b||b==0x5c||b==0x5d||b==0x5e||b==0x60||b==0x7b||b==0x7c||b==0x7d||b==0x7f) {
                    revert("invalid charset");
                }
                if (b>=0x41&&b<=0x5a) {
                    bytes(s)[i] = bytes1(uint8(b) + 32);
                }
                i += 1;
            } else if (b < 0xE0) {
                i += 2;
            } else if (b < 0xF0) {
                i += 3;
            } else if (b < 0xF8) {
                i += 4;
            } else if (b < 0xFC) {
                i += 5;
            } else {
                i += 6;
            }
        }
        return s;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

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);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

import "./IWNS_Passes.sol";
import "./IWRLD_Name_Service_Bridge.sol";
import "./IWRLD_Name_Service_Metadata.sol";
import "./IWRLD_Name_Service_Resolver.sol";
import "./IWRLD_Name_Service_Registry.sol";
import "./StringUtils.sol";

contract WRLD_Name_Service_Registry is ERC721, IWRLD_Name_Service_Registry, IWRLD_Records, Ownable, ReentrancyGuard {
  using StringUtils for *;

  /**
   * @dev @iamarkdev was here
   * @dev @niftyorca was here
   * */

  IWRLD_Name_Service_Metadata metadata;
  IWRLD_Name_Service_Resolver resolver;
  IWRLD_Name_Service_Bridge bridge;

  uint256 private constant YEAR_SECONDS = 31557600; // 365.25 days

  mapping(uint256 => WRLDName) public wrldNames;
  mapping(string => uint256) private nameTokenId;

  address private approvedWithdrawer;
  mapping(address => bool) private approvedRegistrars;

  struct WRLDName {
    string name;
    address controller;
    uint256 expiresAt;
  }

  constructor() ERC721("WRLD Name Service", "WNS") {}

  /************
   * Metadata *
   ************/

  function tokenURI(uint256 _tokenId) override public view returns (string memory) {
    require(_exists(_tokenId), "ERC721Metadata: URI query for nonexistent token");
    return metadata.getMetadata(wrldNames[_tokenId].name, wrldNames[_tokenId].expiresAt);
  }

  /****************
   * Registration *
   ****************/

  function register(address _registerer, string[] calldata _names, uint16[] memory _registrationYears) external override isApprovedRegistrar {
    require(_names.length == _registrationYears.length, "Arg size mismatched");

    for (uint256 i = 0; i < _names.length; i++) {
      require(_registrationYears[i] > 0 && _registrationYears[i] <= 100, "Years must be between 1 and 100");

      string memory name = _names[i].UTS46Normalize();
      uint256 expiresAt = block.timestamp + YEAR_SECONDS * _registrationYears[i];
      uint256 tokenId = _generateNameId(name);  // tokenId is normalized name hashed to an address

      if (_exists(tokenId)) {
        require(wrldNames[tokenId].expiresAt < block.timestamp, "Unavailable name");
        _burn(tokenId);
      }

      wrldNames[tokenId] = WRLDName(name, address(0), expiresAt);
      nameTokenId[name] = tokenId;

      _safeMint(_registerer, tokenId);

      emit NameRegistered(name, name, _registrationYears[i]);
    }
  }

  /*************
   * Extension *
   *************/

  function extendRegistration(string[] memory _names, uint16[] calldata _additionalYears) external override isApprovedRegistrar {
    require(_names.length == _additionalYears.length, "Arg size mismatched");

    for (uint256 i = 0; i < _names.length; i++) {
      require(_additionalYears[i] > 0, "Years must be greater than zero");

      _names[i] = _names[i].UTS46Normalize();

      WRLDName storage wrldName = wrldNames[nameTokenId[_names[i]]];
      wrldName.expiresAt = wrldName.expiresAt + YEAR_SECONDS * _additionalYears[i];

      emit NameRegistrationExtended(_names[i], _names[i], _additionalYears[i]);
    }

    if (_hasBridge()) {
      bridge.extendRegistration(_names, _additionalYears);
    }
  }

  /***********
   * Resolve *
   ***********/

  function nameAvailable(string memory _name) external view normalizeName(_name) returns (bool) {
    return !nameExists(_name) || getNameExpiration(_name) < block.timestamp;
  }

  function nameExists(string memory _name) public view normalizeName(_name) returns (bool) {
    return nameTokenId[_name] != 0;
  }

  function getNameTokenId(string memory _name) external view override normalizeName(_name) returns (uint256) {
    return nameTokenId[_name];
  }

  function getTokenName(uint256 _tokenId) external view returns (string memory) {
    return wrldNames[_tokenId].name;
  }

  function getName(string memory _name) external view normalizeName(_name) returns (WRLDName memory) {
    return wrldNames[nameTokenId[_name]];
  }

  function getNameOwner(string memory _name) public view normalizeName(_name) returns (address) {
    return ownerOf(nameTokenId[_name]);
  }

  function getNameController(string memory _name) public view normalizeName(_name) returns (address) {
    return wrldNames[nameTokenId[_name]].controller;
  }

  function getNameExpiration(string memory _name) public view normalizeName(_name) returns (uint256) {
    return wrldNames[nameTokenId[_name]].expiresAt;
  }

  function getNameStringRecord(string memory _name, string calldata _record) external view normalizeName(_name) returns (StringRecord memory) {
    return resolver.getNameStringRecord(_name, _record);
  }

  function getNameStringRecordsList(string memory _name) external view normalizeName(_name) returns (string[] memory) {
    return resolver.getNameStringRecordsList(_name);
  }

  function getNameStringRecordsListPaginated(string calldata _name, uint256 _offset, uint256 _limit) external view returns (string[] memory) {
    return resolver.getNameStringRecordsListPaginated(_name, _offset, _limit);
  }

  function getNameAddressRecord(string memory _name, string calldata _record) external view normalizeName(_name) returns (AddressRecord memory) {
    return resolver.getNameAddressRecord(_name, _record);
  }

  function getNameAddressRecordsList(string memory _name) external view normalizeName(_name) returns (string[] memory) {
    return resolver.getNameAddressRecordsList(_name);
  }

  function getNameAddressRecordsListPaginated(string calldata _name, uint256 _offset, uint256 _limit) external view returns (string[] memory) {
    return resolver.getNameAddressRecordsListPaginated(_name, _offset, _limit);
  }

  function getNameUintRecord(string memory _name, string calldata _record) external view normalizeName(_name) returns (UintRecord memory) {
    return resolver.getNameUintRecord(_name, _record);
  }

  function getNameUintRecordsList(string memory _name) external view normalizeName(_name) returns (string[] memory) {
    return resolver.getNameUintRecordsList(_name);
  }

  function getNameUintRecordsListPaginated(string calldata _name, uint256 _offset, uint256 _limit) external view returns (string[] memory) {
    return resolver.getNameUintRecordsListPaginated(_name, _offset, _limit);
  }

  function getNameIntRecord(string memory _name, string calldata _record) external view normalizeName(_name) returns (IntRecord memory) {
    return resolver.getNameIntRecord(_name, _record);
  }

  function getNameIntRecordsList(string memory _name) external view normalizeName(_name) returns (string[] memory) {
    return resolver.getNameIntRecordsList(_name);
  }

  function getNameIntRecordsListPaginated(string calldata _name, uint256 _offset, uint256 _limit) external view returns (string[] memory) {
    return resolver.getNameIntRecordsListPaginated(_name, _offset, _limit);
  }

  function getStringEntry(address _setter, string memory _name, string calldata _entry) external view normalizeName(_name) returns (string memory) {
    return resolver.getStringEntry(_setter, _name, _entry);
  }

  function getAddressEntry(address _setter, string memory _name, string calldata _entry) external view normalizeName(_name) returns (address) {
    return resolver.getAddressEntry(_setter, _name, _entry);
  }

  function getUintEntry(address _setter, string memory _name, string calldata _entry) external view normalizeName(_name) returns (uint256) {
    return resolver.getUintEntry(_setter, _name, _entry);
  }

  function getIntEntry(address _setter, string memory _name, string calldata _entry) external view normalizeName(_name) returns (int256) {
    return resolver.getIntEntry(_setter, _name, _entry);
  }

  /***********
   * Control *
   ***********/

  function migrate(string memory _name, uint256 _networkFlags) external normalizeName(_name) isOwnerOrController(_name) {
    require(_hasBridge(), "Bridge not set");

    bridge.migrate(_name, _networkFlags);
  }

  function setController(string memory _name, address _controller) external normalizeName(_name) {
    require(getNameOwner(_name) == msg.sender, "Sender is not owner");

    wrldNames[nameTokenId[_name]].controller = _controller;

    emit NameControllerUpdated(_name, _name, _controller);

    if (_hasBridge()) {
      bridge.setController(_name, _controller);
    }
  }

  function setStringRecord(string memory _name, string calldata _record, string calldata _value, string calldata _typeOf, uint256 _ttl) external normalizeName(_name) isOwnerOrController(_name) {
    resolver.setStringRecord(_name, _record, _value, _typeOf, _ttl);

    emit ResolverStringRecordUpdated(_name, _name, _record, _value, _typeOf, _ttl, address(resolver));

    if (_hasBridge()) {
      bridge.setStringRecord(_name, _record, _value, _typeOf, _ttl);
    }
  }

  function setAddressRecord(string memory _name, string memory _record, address _value, uint256 _ttl) external normalizeName(_name) isOwnerOrController(_name) {
    resolver.setAddressRecord(_name, _record, _value, _ttl);

    emit ResolverAddressRecordUpdated(_name, _name, _record, _value, _ttl, address(resolver));

    if (_hasBridge()) {
      bridge.setAddressRecord(_name, _record, _value, _ttl);
    }
  }

  function setUintRecord(string memory _name, string calldata _record, uint256 _value, uint256 _ttl) external normalizeName(_name) isOwnerOrController(_name) {
    resolver.setUintRecord(_name, _record, _value, _ttl);

    emit ResolverUintRecordUpdated(_name, _name, _record, _value, _ttl, address(resolver));

    if (_hasBridge()) {
      bridge.setUintRecord(_name, _record, _value, _ttl);
    }
  }

  function setIntRecord(string memory _name, string calldata _record, int256 _value, uint256 _ttl) external normalizeName(_name) isOwnerOrController(_name) {
    resolver.setIntRecord(_name, _record, _value, _ttl);

    emit ResolverIntRecordUpdated(_name, _name, _record, _value, _ttl, address(resolver));

    if (_hasBridge()) {
      bridge.setIntRecord(_name, _record, _value, _ttl);
    }
  }

  /***********
   * Entries *
   ***********/

  function setStringEntry(string memory _name, string calldata _entry, string calldata _value) external normalizeName(_name) {
    resolver.setStringEntry(msg.sender, _name, _entry, _value);

    emit ResolverStringEntryUpdated(msg.sender, _name, _entry, _name, _entry, _value);

    if (_hasBridge()) {
      bridge.setStringEntry(msg.sender, _name, _entry, _value);
    }
  }

  function setAddressEntry(string memory _name, string calldata _entry, address _value) external normalizeName(_name) {
    resolver.setAddressEntry(msg.sender, _name, _entry, _value);

    emit ResolverAddressEntryUpdated(msg.sender, _name, _entry, _name, _entry, _value);

    if (_hasBridge()) {
      bridge.setAddressEntry(msg.sender, _name, _entry, _value);
    }
  }

  function setUintEntry(string memory _name, string calldata _entry, uint256 _value) external normalizeName(_name) {
    resolver.setUintEntry(msg.sender, _name, _entry, _value);

    emit ResolverUintEntryUpdated(msg.sender, _name, _entry, _name, _entry, _value);

    if (_hasBridge()) {
      bridge.setUintEntry(msg.sender, _name, _entry, _value);
    }
  }

  function setIntEntry(string memory _name, string calldata _entry, int256 _value) external normalizeName(_name) {
    resolver.setIntEntry(msg.sender, _name, _entry, _value);

    emit ResolverIntEntryUpdated(msg.sender, _name, _entry, _name, _entry, _value);

    if (_hasBridge()) {
      bridge.setIntEntry(msg.sender, _name, _entry, _value);
    }
  }

  /*********
   * Owner *
   *********/

  function setApprovedWithdrawer(address _approvedWithdrawer) external onlyOwner {
    approvedWithdrawer = _approvedWithdrawer;
  }

  function setApprovedRegistrar(address _approvedRegistrar, bool _approved) external onlyOwner {
    approvedRegistrars[_approvedRegistrar] = _approved;
  }

  function setMetadataContract(address _metadata) external onlyOwner {
    IWRLD_Name_Service_Metadata metadataContract = IWRLD_Name_Service_Metadata(_metadata);

    require(metadataContract.supportsInterface(type(IWRLD_Name_Service_Metadata).interfaceId), "Invalid metadata contract");

    metadata = metadataContract;
  }

  function setResolverContract(address _resolver) external onlyOwner {
    IWRLD_Name_Service_Resolver resolverContract = IWRLD_Name_Service_Resolver(_resolver);

    require(resolverContract.supportsInterface(type(IWRLD_Name_Service_Resolver).interfaceId), "Invalid resolver contract");

    resolver = resolverContract;
  }

  function setBridgeContract(address _bridge) external onlyOwner {
    IWRLD_Name_Service_Bridge bridgeContract = IWRLD_Name_Service_Bridge(_bridge);

    require(bridgeContract.supportsInterface(type(IWRLD_Name_Service_Bridge).interfaceId), "Invalid bridge contract");

    bridge = bridgeContract;
  }

  /*************
   * Overrides *
   *************/

  function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal override {
    WRLDName storage wrldName = wrldNames[tokenId];

    wrldName.controller = to;

    resolver.setAddressRecord(wrldName.name, "evm_default", to, 3600);
    emit ResolverAddressRecordUpdated(wrldName.name, wrldName.name, "evm_default", to, 3600, address(resolver));

    if (_hasBridge()) {
      bridge.transfer(from, to, tokenId, wrldName.name);
    }

    super._beforeTokenTransfer(from, to, tokenId);
  }

  /***********
   * Helpers *
   ***********/

  function _hasBridge() private view returns (bool) {
    return address(bridge) != address(0);
  }

  function _generateNameId(string memory _name) private pure returns (uint256) {
    return uint256(uint160(uint256(keccak256(bytes(_name)))));
  }

  /*************
   * Modifiers *
   *************/

  modifier isApprovedRegistrar() {
    require(approvedRegistrars[msg.sender], "msg sender is not registrar");
    _;
  }

  modifier isOwnerOrController(string memory _name) {
    require((getNameOwner(_name) == msg.sender || getNameController(_name) == msg.sender), "Sender is not owner or controller");
    _;
  }

  modifier normalizeName(string memory _name) {
    _name = _name.UTS46Normalize();
    _;
  }
}

{
  "compilationTarget": {
    "contracts/WRLD_Name_Service_Registry.sol": "WRLD_Name_Service_Registry"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 800
  },
  "remappings": []
}