Contract Name:
UniversalRegistrar
Contract Source Code:
pragma solidity >=0.8.4;
interface ENS {
// Logged when the owner of a node assigns a new owner to a subnode.
event NewOwner(bytes32 indexed node, bytes32 indexed label, address owner);
// Logged when the owner of a node transfers ownership to a new account.
event Transfer(bytes32 indexed node, address owner);
// Logged when the resolver for a node changes.
event NewResolver(bytes32 indexed node, address resolver);
// Logged when the TTL of a node changes
event NewTTL(bytes32 indexed node, uint64 ttl);
// Logged when an operator is added or removed.
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
function setRecord(bytes32 node, address owner, address resolver, uint64 ttl) external virtual;
function setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl) external virtual;
function setSubnodeOwner(bytes32 node, bytes32 label, address owner) external virtual returns(bytes32);
function setResolver(bytes32 node, address resolver) external virtual;
function setOwner(bytes32 node, address owner) external virtual;
function setTTL(bytes32 node, uint64 ttl) external virtual;
function setApprovalForAll(address operator, bool approved) external virtual;
function owner(bytes32 node) external virtual view returns (address);
function resolver(bytes32 node) external virtual view returns (address);
function ttl(bytes32 node) external virtual view returns (uint64);
function recordExists(bytes32 node) external virtual view returns (bool);
function isApprovedForAll(address owner, address operator) external virtual view returns (bool);
}
pragma solidity >=0.8.4;
import "./ENS.sol";
/**
* The ENS registry contract.
*/
contract ENSRegistry is ENS {
struct Record {
address owner;
address resolver;
uint64 ttl;
}
mapping (bytes32 => Record) records;
mapping (address => mapping(address => bool)) operators;
// Permits modifications only by the owner of the specified node.
modifier authorised(bytes32 node) {
address owner = records[node].owner;
require(owner == msg.sender || operators[owner][msg.sender]);
_;
}
/**
* @dev Constructs a new ENS registrar.
*/
constructor() public {
records[0x0].owner = msg.sender;
}
/**
* @dev Sets the record for a node.
* @param node The node to update.
* @param owner The address of the new owner.
* @param resolver The address of the resolver.
* @param ttl The TTL in seconds.
*/
function setRecord(bytes32 node, address owner, address resolver, uint64 ttl) external virtual override {
setOwner(node, owner);
_setResolverAndTTL(node, resolver, ttl);
}
/**
* @dev Sets the record for a subnode.
* @param node The parent node.
* @param label The hash of the label specifying the subnode.
* @param owner The address of the new owner.
* @param resolver The address of the resolver.
* @param ttl The TTL in seconds.
*/
function setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl) external virtual override {
bytes32 subnode = setSubnodeOwner(node, label, owner);
_setResolverAndTTL(subnode, resolver, ttl);
}
/**
* @dev Transfers ownership of a node to a new address. May only be called by the current owner of the node.
* @param node The node to transfer ownership of.
* @param owner The address of the new owner.
*/
function setOwner(bytes32 node, address owner) public virtual override authorised(node) {
_setOwner(node, owner);
emit Transfer(node, owner);
}
/**
* @dev Transfers ownership of a subnode keccak256(node, label) to a new address. May only be called by the owner of the parent node.
* @param node The parent node.
* @param label The hash of the label specifying the subnode.
* @param owner The address of the new owner.
*/
function setSubnodeOwner(bytes32 node, bytes32 label, address owner) public virtual override authorised(node) returns(bytes32) {
bytes32 subnode = keccak256(abi.encodePacked(node, label));
_setOwner(subnode, owner);
emit NewOwner(node, label, owner);
return subnode;
}
/**
* @dev Sets the resolver address for the specified node.
* @param node The node to update.
* @param resolver The address of the resolver.
*/
function setResolver(bytes32 node, address resolver) public virtual override authorised(node) {
emit NewResolver(node, resolver);
records[node].resolver = resolver;
}
/**
* @dev Sets the TTL for the specified node.
* @param node The node to update.
* @param ttl The TTL in seconds.
*/
function setTTL(bytes32 node, uint64 ttl) public virtual override authorised(node) {
emit NewTTL(node, ttl);
records[node].ttl = ttl;
}
/**
* @dev Enable or disable approval for a third party ("operator") to manage
* all of `msg.sender`'s ENS records. Emits the ApprovalForAll event.
* @param operator Address to add to the set of authorized operators.
* @param approved True if the operator is approved, false to revoke approval.
*/
function setApprovalForAll(address operator, bool approved) external virtual override {
operators[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
/**
* @dev Returns the address that owns the specified node.
* @param node The specified node.
* @return address of the owner.
*/
function owner(bytes32 node) public virtual override view returns (address) {
address addr = records[node].owner;
if (addr == address(this)) {
return address(0x0);
}
return addr;
}
/**
* @dev Returns the address of the resolver for the specified node.
* @param node The specified node.
* @return address of the resolver.
*/
function resolver(bytes32 node) public virtual override view returns (address) {
return records[node].resolver;
}
/**
* @dev Returns the TTL of a node, and any records associated with it.
* @param node The specified node.
* @return ttl of the node.
*/
function ttl(bytes32 node) public virtual override view returns (uint64) {
return records[node].ttl;
}
/**
* @dev Returns whether a record has been imported to the registry.
* @param node The specified node.
* @return Bool if record exists
*/
function recordExists(bytes32 node) public virtual override view returns (bool) {
return records[node].owner != address(0x0);
}
/**
* @dev Query if an address is an authorized operator for another address.
* @param owner The address that owns the records.
* @param operator The address that acts on behalf of the owner.
* @return True if `operator` is an approved operator for `owner`, false otherwise.
*/
function isApprovedForAll(address owner, address operator) external virtual override view returns (bool) {
return operators[owner][operator];
}
function _setOwner(bytes32 node, address owner) internal virtual {
records[node].owner = owner;
}
function _setResolverAndTTL(bytes32 node, address resolver, uint64 ttl) internal {
if(resolver != records[node].resolver) {
records[node].resolver = resolver;
emit NewResolver(node, resolver);
}
if(ttl != records[node].ttl) {
records[node].ttl = ttl;
emit NewTTL(node, 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 (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 (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 (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
// 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 v4.5.0) (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/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
// 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 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
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/access/Ownable.sol";
contract Controllable is Ownable {
mapping(address => bool) public controllers;
event ControllerChanged(address indexed controller, bool enabled);
modifier onlyController {
require(
controllers[msg.sender],
"Controllable: Caller is not a controller"
);
_;
}
function setController(address controller, bool enabled) public onlyOwner {
controllers[controller] = enabled;
emit ControllerChanged(controller, enabled);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@ensdomains/ens-contracts/contracts/registry/ENS.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./Controllable.sol";
contract Root is Ownable, Controllable {
bytes32 private constant ROOT_NODE = bytes32(0);
bytes4 private constant INTERFACE_META_ID =
bytes4(keccak256("supportsInterface(bytes4)"));
event TLDLocked(bytes32 indexed label);
ENS public ens;
mapping(bytes32 => bool) public locked;
constructor(ENS _ens) {
ens = _ens;
}
function setSubnodeOwner(bytes32 label, address owner) external onlyController
{
require(!locked[label], "name locked");
ens.setSubnodeOwner(ROOT_NODE, label, owner);
}
function setResolver(address resolver) external onlyController {
ens.setResolver(ROOT_NODE, resolver);
}
function lock(bytes32 label) external onlyController {
emit TLDLocked(label);
locked[label] = true;
}
function supportsInterface(bytes4 interfaceID) external pure returns (bool) {
return interfaceID == INTERFACE_META_ID;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
interface IUniversalRegistrar is IERC721 {
event ControllerAdded(bytes32 node, address indexed controller);
event ControllerRemoved(bytes32 node, address indexed controller);
event NameRegistered(
bytes32 node,
bytes32 indexed label,
address indexed owner,
uint256 expires
);
event NameRenewed(bytes32 node, bytes32 indexed label, uint256 expires);
// Authorises a controller, who can register and renew domains.
function addController(bytes32 node, address controller) external;
// Revoke controller permission for an address.
function removeController(bytes32 node, address controller) external;
// Set the resolver for the TLD this registrar manages.
function setResolver(bytes32 node, address resolver) external;
// Returns the expiration timestamp of the specified label hash.
function nameExpires(uint256 id) external view returns (uint256);
// Returns true iff the specified name is available for registration.
function available(uint256 id) external view returns (bool);
/**
* @dev Register a name.
*/
function register(
bytes32 node,
bytes32 label,
address owner,
uint256 duration
) external returns (uint256);
function renew(bytes32 node, bytes32 label, uint256 duration) external returns (uint256);
/**
* @dev Reclaim ownership of a name in ENS, if you own it in the registrar.
*/
function reclaim(bytes32 node, bytes32 label, address owner) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "../root/Root.sol";
contract RegistrarAccess {
event NodeOwnerChanged(bytes32 node, address indexed oldOwner, address indexed newOwner);
event RegistryControllersChanged(address indexed controller, bool approved);
event RegistryNodeControllersChanged(bytes32 node, address indexed controller, bool approved);
Root public root;
constructor(Root _root) {
root = _root;
}
// A map of top level domains and their authorised owner
mapping(bytes32 => address) private nodeOwners;
// A map specifying which controller addresses TLD owners are allowed to use.
mapping(address => bool) private registryControllers;
// A map specifying which controller addresses a specific TLD owner is allowed to use.
mapping(bytes32 => mapping(address => bool)) private registryNodeControllers;
modifier onlyNodeOwner(bytes32 node) {
require(nodeOwners[node] == msg.sender);
_;
}
modifier onlyRegistry {
require(root.controllers(msg.sender));
_;
}
modifier onlyRegistryControllers(bytes32 node, address controller) {
require(registryNodeControllers[node][controller] ||
registryControllers[controller], "controller not approved by registry");
_;
}
// Transfers ownership of a TLD to a new owner
// can only be called by existing node owner.
function transferNodeOwnership(bytes32 node, address newOwner) public onlyNodeOwner(node) {
require(newOwner != address(0));
emit NodeOwnerChanged(node, nodeOwners[node], newOwner);
nodeOwners[node] = newOwner;
}
// Gives up ownership of a TLD to a burn address. All functionality marked with onlyNodeOwner
// will be disabled for the specified TLD. It will also affect any contracts
// that rely on {ownerOfNode}. Use with extreme caution.
function renounceNodeOwnership(bytes32 node) public onlyNodeOwner(node) {
emit NodeOwnerChanged(node, nodeOwners[node], address(0));
nodeOwners[node] = address(0);
}
function ownerOfNode(bytes32 node) public view returns (address) {
return nodeOwners[node];
}
// Sets ownership of a name in the registrar. If the name
// is locked, only the owner can transfer ownership by
// calling transferNodeOwnership.
function setSubnodeOwner(bytes32 label, address owner) public onlyRegistry returns(bytes32) {
require(!root.locked(label), "name locked");
bytes32 node = keccak256(abi.encodePacked(bytes32(0), label));
emit NodeOwnerChanged(node, nodeOwners[node], owner);
nodeOwners[node] = owner;
return node;
}
// Whitelists a controller address to be used by the specified node.
function approveControllerForNode(bytes32 node, address controller, bool approved) external onlyRegistry {
registryNodeControllers[node][controller] = approved;
emit RegistryNodeControllersChanged(node, controller, approved);
}
// Whitelists a controller address to be used by any node.
function approveController(address controller, bool approved) external onlyRegistry {
registryControllers[controller] = approved;
emit RegistryControllersChanged(controller, approved);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@ensdomains/ens-contracts/contracts/registry/ENS.sol";
import "@ensdomains/ens-contracts/contracts/registry/ENSRegistry.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./IUniversalRegistrar.sol";
import "./RegistrarAccess.sol";
contract UniversalRegistrar is ERC721, RegistrarAccess, IUniversalRegistrar, Ownable {
// A map of expiry times
mapping(uint256 => uint) expiries;
ENS public ens;
// ERC721 Metadata URI
string private metadataUri;
// A map of addresses that are authorised to register and renew
// names for the given top level node.
mapping(bytes32 => mapping(address => bool)) public controllers;
uint256 public constant GRACE_PERIOD = 90 days;
bytes4 constant private INTERFACE_META_ID = bytes4(keccak256("supportsInterface(bytes4)"));
bytes4 constant private ERC721_ID = bytes4(
keccak256("balanceOf(address)") ^
keccak256("ownerOf(uint256)") ^
keccak256("approve(address,uint256)") ^
keccak256("getApproved(uint256)") ^
keccak256("setApprovalForAll(address,bool)") ^
keccak256("isApprovedForAll(address,address)") ^
keccak256("transferFrom(address,address,uint256)") ^
keccak256("safeTransferFrom(address,address,uint256)") ^
keccak256("safeTransferFrom(address,address,uint256,bytes)")
);
bytes4 constant private RECLAIM_ID = bytes4(keccak256("reclaim(bytes32,uint256,address)"));
/**
* v2.1.3 version of _isApprovedOrOwner which calls ownerOf(tokenId) and takes grace period into consideration instead of ERC721.ownerOf(tokenId);
* https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.1.3/contracts/token/ERC721/ERC721.sol#L187
* @dev Returns whether the given spender can transfer a given token ID
* @param spender address of the spender to query
* @param tokenId uint256 ID of the token to be transferred
* @return bool whether the msg.sender is approved for the given token ID,
* is an operator of the owner, or is the owner of the token
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view override returns (bool) {
address owner = ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
constructor(ENS _ens, Root _root) ERC721("Impervious Registry", "IR") RegistrarAccess(_root) {
ens = _ens;
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`.
*/
function _baseURI() internal view virtual override returns (string memory) {
return metadataUri;
}
modifier live(bytes32 node) {
require(ens.owner(node) == address(this));
_;
}
modifier onlyController(bytes32 node) {
require(controllers[node][msg.sender]);
_;
}
/**
* @dev Gets the owner of the specified token ID. Names become unowned
* when their registration expires.
* @param tokenId uint256 ID of the token to query the owner of
* @return address currently marked as the owner of the given token ID
*/
function ownerOf(uint256 tokenId) public view override(IERC721, ERC721) returns (address) {
require(expiries[tokenId] > block.timestamp);
return super.ownerOf(tokenId);
}
// Change metadata uri
function setUri(string memory _uri) external onlyOwner {
metadataUri = _uri;
}
// Authorises a controller, who can register and renew domains.
// can only be called by the node owner.
function addController(
bytes32 node,
address controller
) external override onlyNodeOwner(node) onlyRegistryControllers(node, controller) {
controllers[node][controller] = true;
emit ControllerAdded(node, controller);
}
// Revoke controller permission for an address.
// can only be called by the node owner.
function removeController(bytes32 node, address controller) external override onlyNodeOwner(node) {
controllers[node][controller] = false;
emit ControllerRemoved(node, controller);
}
// Set the resolver for the TLD this registrar manages.
// can only be called by the node owner.
function setResolver(bytes32 node, address resolver) external override onlyNodeOwner(node) {
ens.setResolver(node, resolver);
}
// Returns the expiration timestamp of the specified id.
function nameExpires(uint256 id) external view override returns (uint) {
return expiries[id];
}
// Returns true iff the specified name is available for registration.
function available(uint256 id) public view override returns (bool) {
// Not available if it's registered here or in its grace period.
return expiries[id] + GRACE_PERIOD < block.timestamp;
}
/**
* @dev Register a name.
* @param node The node hash.
* @param label The token ID (keccak256 of the label).
* @param owner The address that should own the registration.
* @param duration Duration in seconds for the registration.
*/
function register(bytes32 node, bytes32 label, address owner, uint duration) external override returns (uint) {
return _register(node, label, owner, duration, true);
}
/**
* @dev Register a name, without modifying the registry.
* @param node The node hash.
* @param label The token ID (keccak256 of the label).
* @param owner The address that should own the registration.
* @param duration Duration in seconds for the registration.
*/
function registerOnly(bytes32 node, bytes32 label, address owner, uint duration) external returns (uint) {
return _register(node, label, owner, duration, false);
}
function _register(bytes32 node, bytes32 label, address owner,
uint duration, bool updateRegistry) internal live(node) onlyController(node) returns (uint) {
require(block.timestamp + duration + GRACE_PERIOD > block.timestamp + GRACE_PERIOD); // Prevent future overflow
uint256 id = _tokenID(node, label);
require(available(id));
expiries[id] = block.timestamp + duration;
if (_exists(id)) {
// Name was previously owned, and expired
_burn(id);
}
_mint(owner, id);
if (updateRegistry) {
ens.setSubnodeOwner(node, label, owner);
}
emit NameRegistered(node, label, owner, block.timestamp + duration);
return block.timestamp + duration;
}
function renew(bytes32 node, bytes32 label, uint duration) external override live(node) onlyController(node) returns (uint) {
uint256 id = _tokenID(node, label);
require(expiries[id] + GRACE_PERIOD >= block.timestamp); // Name must be registered here or in grace period
require(expiries[id] + duration + GRACE_PERIOD > duration + GRACE_PERIOD); // Prevent future overflow
expiries[id] += duration;
emit NameRenewed(node, label, expiries[id]);
return expiries[id];
}
/**
* @dev Reclaim ownership of a name in ENS, if you own it in the registrar.
*/
function reclaim(bytes32 node, bytes32 label, address owner) external override live(node) {
uint256 id = _tokenID(node, label);
require(_isApprovedOrOwner(msg.sender, id));
ens.setSubnodeOwner(node, label, owner);
}
function supportsInterface(bytes4 interfaceID) public override(ERC721, IERC165) view returns (bool) {
return interfaceID == INTERFACE_META_ID ||
interfaceID == ERC721_ID ||
interfaceID == RECLAIM_ID;
}
function _tokenID(bytes32 node, bytes32 label) internal pure returns (uint256) {
return uint256(keccak256(abi.encodePacked(node, label)));
}
}