Contract Overview
Latest 25 from a total of 5370 transactions
Contract Name:
Web3Domains
Compiler Version
v0.8.12+commit.f00d7308
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } pragma solidity ^0.8.0; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { require(!paused(), "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { require(paused(), "Pausable: not paused"); _; } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } } pragma solidity ^0.8.0; // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. /** * @dev Wrappers over Solidity's arithmetic operations. * * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler * now has built in overflow checking. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } } 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); } pragma solidity ^0.8.0; /** * @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; } } pragma solidity ^0.8.0; /** * @title Counters * @author Matt Condon (@shrugs) * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number * of elements in a mapping, issuing ERC721 ids, or counting request ids. * * Include with `using Counters for Counters.Counter;` */ library Counters { struct Counter { // This variable should never be directly accessed by users of the library: interactions must be restricted to // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add // this feature: see https://github.com/ethereum/solidity/issues/4637 uint256 _value; // default: 0 } function current(Counter storage counter) internal view returns (uint256) { return counter._value; } function increment(Counter storage counter) internal { unchecked { counter._value += 1; } } function decrement(Counter storage counter) internal { uint256 value = counter._value; require(value > 0, "Counter: decrement overflow"); unchecked { counter._value = value - 1; } } function reset(Counter storage counter) internal { counter._value = 0; } } 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); } } pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } pragma solidity ^0.8.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _setOwner(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _setOwner(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _setOwner(newOwner); } function _setOwner(address newOwner) private { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } pragma solidity ^0.8.0; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; } pragma solidity ^0.8.0; /** * @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); } pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); } pragma solidity ^0.8.0; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: owner query for nonexistent token"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { require(operator != _msgSender(), "ERC721: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ERC721.ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint( address to, uint256 tokenId, bytes memory _data ) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) internal virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} } pragma solidity ^0.8.0; abstract contract ERC721Enumerable is ERC721, IERC721Enumerable { // Mapping from owner to list of owned token IDs mapping(address => mapping(uint256 => uint256)) private _ownedTokens; // Mapping from token ID to index of the owner tokens list mapping(uint256 => uint256) private _ownedTokensIndex; // Array with all token ids, used for enumeration uint256[] private _allTokens; // Mapping from token id to position in the allTokens array mapping(uint256 => uint256) private _allTokensIndex; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) { return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) { require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds"); return _ownedTokens[owner][index]; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _allTokens.length; } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view virtual override returns (uint256) { require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds"); return _allTokens[index]; } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` cannot be the zero address. * - `to` cannot be the zero address. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override { super._beforeTokenTransfer(from, to, tokenId); if (from == address(0)) { _addTokenToAllTokensEnumeration(tokenId); } else if (from != to) { _removeTokenFromOwnerEnumeration(from, tokenId); } if (to == address(0)) { _removeTokenFromAllTokensEnumeration(tokenId); } else if (to != from) { _addTokenToOwnerEnumeration(to, tokenId); } } /** * @dev Private function to add a token to this extension's ownership-tracking data structures. * @param to address representing the new owner of the given token ID * @param tokenId uint256 ID of the token to be added to the tokens list of the given address */ function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private { uint256 length = ERC721.balanceOf(to); _ownedTokens[to][length] = tokenId; _ownedTokensIndex[tokenId] = length; } /** * @dev Private function to add a token to this extension's token tracking data structures. * @param tokenId uint256 ID of the token to be added to the tokens list */ function _addTokenToAllTokensEnumeration(uint256 tokenId) private { _allTokensIndex[tokenId] = _allTokens.length; _allTokens.push(tokenId); } /** * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for * gas optimizations e.g. when performing a transfer operation (avoiding double writes). * This has O(1) time complexity, but alters the order of the _ownedTokens array. * @param from address representing the previous owner of the given token ID * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address */ function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private { // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = ERC721.balanceOf(from) - 1; uint256 tokenIndex = _ownedTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary if (tokenIndex != lastTokenIndex) { uint256 lastTokenId = _ownedTokens[from][lastTokenIndex]; _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index } // This also deletes the contents at the last position of the array delete _ownedTokensIndex[tokenId]; delete _ownedTokens[from][lastTokenIndex]; } /** * @dev Private function to remove a token from this extension's token tracking data structures. * This has O(1) time complexity, but alters the order of the _allTokens array. * @param tokenId uint256 ID of the token to be removed from the tokens list */ function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private { // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = _allTokens.length - 1; uint256 tokenIndex = _allTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding // an 'if' statement (like in _removeTokenFromOwnerEnumeration) uint256 lastTokenId = _allTokens[lastTokenIndex]; _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index // This also deletes the contents at the last position of the array delete _allTokensIndex[tokenId]; _allTokens.pop(); } } pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } library Roles { struct Role { mapping (address => bool) bearer; } /** * @dev Give an account access to this role. */ function add(Role storage role, address account) internal { require(!has(role, account), "Roles: account already has role"); role.bearer[account] = true; } /** * @dev Remove an account's access to this role. */ function remove(Role storage role, address account) internal { require(has(role, account), "Roles: account does not have role"); role.bearer[account] = false; } /** * @dev Check if an account has this role. * @return bool */ function has(Role storage role, address account) internal view returns (bool) { require(account != address(0), "Roles: account is the zero address"); return role.bearer[account]; } } contract AdminControl is Ownable { using Roles for Roles.Role; Roles.Role private _controllerRoles; modifier onlyMinterController() { require ( hasRole(msg.sender), "AdminControl: sender must has minting role" ); _; } modifier onlyMinter() { require ( hasRole(msg.sender), "AdminControl: sender must has minting role" ); _; } constructor() { _grantRole(msg.sender); } function grantMinterRole (address account) public onlyOwner { _grantRole(account); } function revokeMinterRole (address account) public onlyOwner { _revokeRole(account); } function hasRole(address account) public view returns (bool) { return _controllerRoles.has(account); } function _grantRole (address account) internal { _controllerRoles.add(account); } function _revokeRole (address account) internal { _controllerRoles.remove(account); } } library StringUtil { /** * @dev Return the count of the dot "." in a string */ function dotCount(string memory s) internal pure returns (uint) { s; // Don't warn about unused variables // Starting here means the LSB will be the byte we care about uint ptr; uint end; assembly { ptr := add(s, 1) end := add(mload(s), ptr) } uint num = 0; uint len = 0; for (len; ptr < end; len++) { uint8 b; assembly { b := and(mload(ptr), 0xFF) } if (b == 0x2e) { num += 1; } ptr += 1; } return num; } function toLower(string memory str) internal pure returns (string memory) { bytes memory bStr = bytes(str); bytes memory bLower = new bytes(bStr.length); for (uint i = 0; i < bStr.length; i++) { // Uppercase character... if ((uint8(bStr[i]) >= 65) && (uint8(bStr[i]) <= 90)) { // So we add 32 to make it lowercase bLower[i] = bytes1(uint8(bStr[i]) + 32); } else { bLower[i] = bStr[i]; } } return string(bLower); } function toHash(string memory _s) internal pure returns (bytes32) { return keccak256(abi.encode(_s)); } function isEmpty(string memory _s) internal pure returns (bool) { return bytes(_s).length == 0; } function compare(string memory _a, string memory _b) internal pure returns (int) { bytes memory a = bytes(_a); bytes memory b = bytes(_b); uint minLength = a.length; if (b.length < minLength) minLength = b.length; //@todo unroll the loop into increments of 32 and do full 32 byte comparisons for (uint i = 0; i < minLength; i ++) if (a[i] < b[i]) return -1; else if (a[i] > b[i]) return 1; if (a.length < b.length) return -1; else if (a.length > b.length) return 1; else return 0; } /// @dev Compares two strings and returns true iff they are equal. function equal(string memory _a, string memory _b) internal pure returns (bool) { return compare(_a, _b) == 0; } /// @dev Finds the index of the first occurrence of _needle in _haystack function indexOf(string memory _haystack, string memory _needle) internal pure returns (int) { bytes memory h = bytes(_haystack); bytes memory n = bytes(_needle); if(h.length < 1 || n.length < 1 || (n.length > h.length)) return -1; else if(h.length > (2**128 -1)) // since we have to be able to return -1 (if the char isn't found or input error), this function must return an "int" type with a max length of (2^128 - 1) return -1; else { uint subindex = 0; for (uint i = 0; i < h.length; i ++) { if (h[i] == n[0]) // found the first char of b { subindex = 1; while(subindex < n.length && (i + subindex) < h.length && h[i + subindex] == n[subindex]) // search until the chars don't match or until we reach the end of a or b { subindex++; } if(subindex == n.length) return int(i); } } return -1; } } } library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { return _values(set._inner); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; assembly { result := store } return result; } } pragma solidity ^0.8.0; abstract contract KeyStorage { mapping(uint256 => string) private _keys; function getKey(uint256 keyHash) public view returns (string memory) { return _keys[keyHash]; } function getKeys(uint256[] calldata hashes) public view returns (string[] memory values) { values = new string[](hashes.length); for (uint256 i = 0; i < hashes.length; i++) { values[i] = getKey(hashes[i]); } } function addKey(string memory key) external { _addKey(uint256(keccak256(abi.encodePacked(key))), key); } function _existsKey(uint256 keyHash) internal view returns (bool) { return bytes(_keys[keyHash]).length > 0; } function _addKey(uint256 keyHash, string memory key) internal { if (!_existsKey(keyHash)) { _keys[keyHash] = key; } } } pragma solidity ^0.8.0; interface IRecordReader { /** * @dev Function to get record. * @param key The key to query the value of. * @param tokenId The token id to fetch. * @return The value string. */ function get(string calldata key, uint256 tokenId) external view returns (string memory); /** * @dev Function to get multiple record. * @param keys The keys to query the value of. * @param tokenId The token id to fetch. * @return The values. */ function getMany(string[] calldata keys, uint256 tokenId) external view returns (string[] memory); /** * @dev Function get value by provied key hash. * @param keyHash The key to query the value of. * @param tokenId The token id to set. */ function getByHash(uint256 keyHash, uint256 tokenId) external view returns (string memory key, string memory value); /** * @dev Function get values by provied key hashes. * @param keyHashes The key to query the value of. * @param tokenId The token id to set. */ function getManyByHash(uint256[] calldata keyHashes, uint256 tokenId) external view returns (string[] memory keys, string[] memory values); } pragma solidity ^0.8.0; interface IRecordStorage is IRecordReader { event Set(uint256 indexed tokenId, string indexed keyIndex, string indexed valueIndex, string key, string value); event NewKey(uint256 indexed tokenId, string indexed keyIndex, string key); event ResetRecords(uint256 indexed tokenId); /** * @dev Set record by key * @param key The key set the value of * @param value The value to set key to * @param tokenId ERC-721 token id to set */ function set( string calldata key, string calldata value, uint256 tokenId ) external; /** * @dev Set records by keys * @param keys The keys set the values of * @param values Records values * @param tokenId ERC-721 token id of the domain */ function setMany( string[] memory keys, string[] memory values, uint256 tokenId ) external; /** * @dev Set record by key hash * @param keyHash The key hash set the value of * @param value The value to set key to * @param tokenId ERC-721 token id to set */ function setByHash( uint256 keyHash, string calldata value, uint256 tokenId ) external; /** * @dev Set records by key hashes * @param keyHashes The key hashes set the values of * @param values Records values * @param tokenId ERC-721 token id of the domain */ function setManyByHash( uint256[] calldata keyHashes, string[] calldata values, uint256 tokenId ) external; /** * @dev Reset all domain records and set new ones * @param keys New record keys * @param values New record values * @param tokenId ERC-721 token id of the domain */ function reconfigure( string[] memory keys, string[] memory values, uint256 tokenId ) external; /** * @dev Function to reset all existing records on a domain. * @param tokenId ERC-721 token id to set. */ function reset(uint256 tokenId) external; } pragma solidity ^0.8.0; abstract contract RecordStorage is KeyStorage, IRecordStorage { /// @dev mapping of presetIds to keyIds to values mapping(uint256 => mapping(uint256 => string)) internal _records; /// @dev mapping of tokenIds to presetIds mapping(uint256 => uint256) internal _tokenPresets; function get(string calldata key, uint256 tokenId) external view override returns (string memory value) { value = _get(key, tokenId); } function getMany(string[] calldata keys, uint256 tokenId) external view override returns (string[] memory values) { values = new string[](keys.length); for (uint256 i = 0; i < keys.length; i++) { values[i] = _get(keys[i], tokenId); } } function getByHash(uint256 keyHash, uint256 tokenId) external view override returns (string memory key, string memory value) { (key, value) = _getByHash(keyHash, tokenId); } function getManyByHash(uint256[] calldata keyHashes, uint256 tokenId) external view override returns (string[] memory keys, string[] memory values) { keys = new string[](keyHashes.length); values = new string[](keyHashes.length); for (uint256 i = 0; i < keyHashes.length; i++) { (keys[i], values[i]) = _getByHash(keyHashes[i], tokenId); } } function _presetOf(uint256 tokenId) internal view virtual returns (uint256) { return _tokenPresets[tokenId] == 0 ? tokenId : _tokenPresets[tokenId]; } function _set( string calldata key, string calldata value, uint256 tokenId ) internal { uint256 keyHash = uint256(keccak256(abi.encodePacked(key))); _addKey(keyHash, key); _set(keyHash, key, value, tokenId); } function _setMany( string[] calldata keys, string[] calldata values, uint256 tokenId ) internal { for (uint256 i = 0; i < keys.length; i++) { _set(keys[i], values[i], tokenId); } } function _setByHash( uint256 keyHash, string calldata value, uint256 tokenId ) internal { require(_existsKey(keyHash), 'RecordStorage: KEY_NOT_FOUND'); _set(keyHash, getKey(keyHash), value, tokenId); } function _setManyByHash( uint256[] calldata keyHashes, string[] calldata values, uint256 tokenId ) internal { for (uint256 i = 0; i < keyHashes.length; i++) { _setByHash(keyHashes[i], values[i], tokenId); } } function _reconfigure( string[] calldata keys, string[] calldata values, uint256 tokenId ) internal { _reset(tokenId); _setMany(keys, values, tokenId); } function _reset(uint256 tokenId) internal { _tokenPresets[tokenId] = uint256(keccak256(abi.encodePacked(_presetOf(tokenId)))); emit ResetRecords(tokenId); } function _get(string memory key, uint256 tokenId) private view returns (string memory) { return _get(uint256(keccak256(abi.encodePacked(key))), tokenId); } function _getByHash(uint256 keyHash, uint256 tokenId) private view returns (string memory key, string memory value) { key = getKey(keyHash); value = _get(keyHash, tokenId); } function _get(uint256 keyHash, uint256 tokenId) private view returns (string memory) { return _records[_presetOf(tokenId)][keyHash]; } function _set( uint256 keyHash, string memory key, string memory value, uint256 tokenId ) private { if (bytes(_records[_presetOf(tokenId)][keyHash]).length == 0) { emit NewKey(tokenId, key, key); } _records[_presetOf(tokenId)][keyHash] = value; emit Set(tokenId, key, value, key, value); } } pragma solidity ^0.8.0; abstract contract WhiteList is AdminControl { mapping(address => uint256) public _whiteList; bool public isWhiteListActive = false; function setWhiteListActive(bool _isWhiteListActive) external onlyOwner { isWhiteListActive = _isWhiteListActive; } function addWhiteLists(address[] calldata accounts, uint256 numbers) external onlyMinterController { for (uint256 i = 0; i < accounts.length; i++) { _whiteList[accounts[i]] = numbers; } } function addWhiteList(address account, uint256 numbers) external onlyMinterController { _whiteList[account] = numbers; } function numberInWhiteList(address addr) external view returns (uint256) { return _whiteList[addr]; } function chkInWhiteList(address addr) external view returns (bool) { return _whiteList[addr] > 0; } } abstract contract BookingList is AdminControl { mapping(bytes => string) public _bookingList; bool public _isBookingListActive = false; function setBookingListActive() external onlyOwner { _isBookingListActive = !_isBookingListActive; } function addBookingLists(string[] calldata names) external onlyMinterController { for (uint256 i = 0; i < names.length; i++) { _bookingList[bytes(names[i])] = names[i]; } } function addBookingList(string calldata name) external onlyMinterController { _bookingList[bytes(name)] = name; } function removeBookingList(string calldata name) external onlyMinterController { delete _bookingList[bytes(name)]; } function chkInBookingList(string calldata name) external view returns (bool) { string memory _name = _bookingList[bytes(name)]; return bytes(_name).length > 0; } } pragma solidity ^0.8.0; contract Web3Domains is ERC721, ERC721Enumerable, AdminControl, RecordStorage, WhiteList, BookingList { using SafeMath for uint256; using EnumerableSet for EnumerableSet.UintSet; event NewURI(uint256 indexed tokenId, string tokenUri); mapping (uint256 => EnumerableSet.UintSet) private _subTokens; mapping (uint256 => string) public _tokenURIs; mapping(uint256 => bytes) public _nativeAddress; mapping (uint256 => address) internal _tokenResolvers; mapping(address => uint256) private _tokenReverses; mapping(uint256 => string) private _tlds; string private _nftBaseURI = ""; bool public _saleIsActive = true; bool public _saleTwoCharIsActive = false; uint256 private _price = 1 ether; uint256 private _2chartimes = 100; uint256 private _3chartimes = 10; uint256 private _4chartimes = 5; modifier onlyApprovedOrOwner(uint256 tokenId) { require( _isApprovedOrOwner(_msgSender(), tokenId) ); _; } constructor() ERC721("IoTex Web3 Domains", "IWD") { } function isApprovedOrOwner(address account, uint256 tokenId) external view returns(bool) { return _isApprovedOrOwner(account, tokenId); } function getOwner(string memory domain) external view returns (address) { string memory _domain = StringUtil.toLower(domain); uint256 tokenId = uint256(keccak256(abi.encodePacked(_domain))); return ownerOf(tokenId); } function getDomainbyAddress(address account) external view returns (uint256[] memory tokenIds, string[] memory domains) { uint256 _balance = balanceOf(account); require(_balance > 0, ""); uint256[] memory _tokenIds = new uint256[](_balance); string[] memory _domains = new string[](_balance); for (uint256 i = 0; i < _balance; i++) { uint256 tokenId = tokenOfOwnerByIndex(account, i); string memory domain = _tokenURIs[tokenId]; _tokenIds[i] = tokenId; _domains[i] = domain; } tokenIds = _tokenIds; domains = _domains; } function exists(uint256 tokenId) external view returns (bool) { return _exists(tokenId); } function getPrice() public view returns (uint256) { return _price; } function getPrice2Char() public view returns (uint256) { return getPrice().mul(_2chartimes); } function getPrice3Char() public view returns (uint256) { return getPrice().mul(_3chartimes); } function getPrice4Char() public view returns (uint256) { return getPrice().mul(_4chartimes); } function get2charTimes() public view returns (uint256) { return _2chartimes; } function get3charTimes() public view returns (uint256) { return _3chartimes; } function get4charTimes() public view returns (uint256) { return _4chartimes; } function setTimes(uint256 _2chartimenew, uint256 _3chartimenew, uint256 _4chartimenew) public onlyOwner { _2chartimes = _2chartimenew; _3chartimes = _3chartimenew; _4chartimes = _4chartimenew; } function setPrice(uint256 price) public onlyOwner { _price = price; } function setSaleStateTwoChar() public onlyOwner { _saleTwoCharIsActive = !_saleTwoCharIsActive; } function setTLD(string memory _tld) public onlyOwner { uint256 tokenId = genTokenId(_tld); _tlds[tokenId] = _tld; } function isTLD(string memory _tld) public view returns (bool) { bool isExist = false; uint256 tokenId = genTokenId(_tld); if (bytes(_tlds[tokenId]).length != 0){ isExist = true; } return isExist; } function setSaleState() public onlyOwner { _saleIsActive = !_saleIsActive; } function _baseURI() internal view override returns (string memory) { return _nftBaseURI; } function setBaseURI(string memory _uri) external onlyOwner { _nftBaseURI = _uri; } function tokenURI(uint256 tokenId) public view override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory _tokenURI = _tokenURIs[tokenId]; // If there is no base URI, return the token URI. string memory baseURI = _baseURI(); if (bytes(baseURI).length == 0) { return _tokenURI; } // If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked). if (bytes(_tokenURI).length > 0) { return string(abi.encodePacked(baseURI, _tokenURI)); } // If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI. return string(abi.encodePacked(baseURI, tokenId)); } function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual { require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token"); _tokenURIs[tokenId] = _tokenURI; } function buyDomain(string memory domain, string memory tld) external payable { require(_saleIsActive, "Sale must be active to buy"); require(bytes(tld).length != 0, "Top level domain must be non-empty"); require(isTLD(tld) == true, "Top level domain not exist"); require(StringUtil.dotCount(domain) == 0, "Domains cannot contain dot"); uint256 _length = bytes(domain).length; require(_length != 0, "Domain must be non-empty"); require(_length >= 2, "Domain requires at least 2 characters"); // Check BookingList if (_isBookingListActive == true){ string memory name = _bookingList[bytes(domain)]; require(bytes(name).length == 0, "This name is already reserved"); } // Check WhiteList if (isWhiteListActive == true){ uint256 numbers = _whiteList[msg.sender]; require(numbers > 0, "The address is not in the Whitelist"); require(numbers >= balanceOf(msg.sender), "Exceeded max available to purchase"); } if (_length == 2) { require(_saleTwoCharIsActive == true, "2 Character domain names need to be allowed to buy"); require(msg.value >= getPrice().mul(_2chartimes), "Insufficient Token or Token value sent is not correct"); } if (_length == 3) { require(msg.value >= getPrice().mul(_3chartimes), "Insufficient Token or Token value sent is not correct"); } if (_length == 4) { require(msg.value >= getPrice().mul(_4chartimes), "Insufficient Token or Token value sent is not correct"); } if (_length >= 5) { require(msg.value >= getPrice(), "Insufficient Token or Token value sent is not correct"); } string memory _domain = StringUtil.toLower(domain); string memory _tld = StringUtil.toLower(tld); _domain = string(abi.encodePacked(_domain, ".", _tld)); uint256 tokenId = genTokenId(_domain); require (!_exists(tokenId), "Domain already exists"); _safeMint(msg.sender, tokenId); _setTokenURI(tokenId, _domain); emit NewURI(tokenId, _domain); } function registerDomain(address to, string memory domain, string memory tld) external onlyMinterController { require(to != address(0), "To address is null"); require(bytes(tld).length != 0, "Top level domain must be non-empty"); require(isTLD(tld) == true, "Top level domain not exist"); require(bytes(domain).length != 0, "Domain must be non-empty"); require(StringUtil.dotCount(domain) == 0, "Domain not support"); string memory _domain = StringUtil.toLower(domain); string memory _tld = StringUtil.toLower(tld); _domain = string(abi.encodePacked(_domain, ".", _tld)); uint256 tokenId = genTokenId(_domain); require (!_exists(tokenId), "Domain already exists"); _safeMint(to, tokenId); _setTokenURI(tokenId, _domain); emit NewURI(tokenId, _domain); } function transferFrom( address from, address to, uint256 tokenId ) public virtual override(IERC721, ERC721) { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _reset(tokenId); _transfer(from, to, tokenId); } function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override(IERC721, ERC721) { safeTransferFrom(from, to, tokenId, ""); } function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override(IERC721, ERC721) { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _reset(tokenId); _safeTransfer(from, to, tokenId, _data); } function burn(uint256 tokenId) public virtual { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved"); if (bytes(_tokenURIs[tokenId]).length != 0) { delete _tokenURIs[tokenId]; } if (_tokenReverses[_msgSender()] != 0) { delete _tokenReverses[_msgSender()]; } if (_tokenResolvers[tokenId] != address(0)) { delete _tokenResolvers[tokenId]; } _reset(tokenId); _burn(tokenId); } function setOwner(address to, uint256 tokenId) external onlyApprovedOrOwner(tokenId) { _transfer(ownerOf(tokenId), to, tokenId); } /** * Begin: set and get Reverses */ function reverseOf(address account) public view returns (string memory){ uint256 tokenId = _tokenReverses[account]; require(tokenId != 0, 'ReverseResolver: REVERSE_RECORD_IS_EMPTY'); require(_isApprovedOrOwner(account, tokenId), 'ReverseResolver: ACCOUNT_IS_NOT_APPROVED_OR_OWNER'); return _tokenURIs[tokenId]; } function setReverse(uint256 tokenId) public { address _sender = _msgSender(); require(_isApprovedOrOwner(_sender, tokenId), 'ReverseResolver: SENDER_IS_NOT_APPROVED_OR_OWNER'); _tokenReverses[_sender] = tokenId; } function setReverse(string memory domain) public { uint256 tokenId = genTokenId(domain); address _sender = _msgSender(); require(_isApprovedOrOwner(_sender, tokenId), 'ReverseResolver: SENDER_IS_NOT_APPROVED_OR_OWNER'); _tokenReverses[_sender] = tokenId; } function removeReverse() public { address _sender = _msgSender(); uint256 tokenId = _tokenReverses[_sender]; require(tokenId != 0, 'ReverseResolver: REVERSE_RECORD_IS_EMPTY'); delete _tokenReverses[_sender]; } /** * End: set and get Reverses */ /** * Begin set and get Resolver **/ function setResolver(uint256 tokenId, address resolver) external onlyApprovedOrOwner(tokenId) { _setResolver(tokenId, resolver); } function resolverOf(string memory domain) external view returns (address) { uint256 tokenId = genTokenId(domain); if (_exists(tokenId) == false){ return address(0); } address resolver = _tokenResolvers[tokenId]; if (resolver == address(0)){ resolver = address(this); } return resolver; } function resolverOf(uint256 tokenId) external view returns (address) { if (_exists(tokenId) == false){ return address(0); } address resolver = _tokenResolvers[tokenId]; if (resolver == address(0)){ resolver = address(this); } return resolver; } function removeResolver(string memory domain) external { uint256 tokenId = genTokenId(domain); address _sender = _msgSender(); require(_isApprovedOrOwner(_sender, tokenId), 'ReverseResolver: SENDER_IS_NOT_APPROVED_OR_OWNER'); delete _tokenResolvers[tokenId]; } function removeResolver(uint256 tokenId) external onlyApprovedOrOwner(tokenId) { require(tokenId != 0, 'ReverseResolver: REVERSE_RECORD_IS_EMPTY'); delete _tokenResolvers[tokenId]; } function _setResolver(uint256 tokenId, address resolver) internal { require (_exists(tokenId)); _tokenResolvers[tokenId] = resolver; } /** * End:Resolver */ /** * Begin: Subdomain */ function registerSubDomain(address to, uint256 tokenId, string memory sub) external onlyApprovedOrOwner(tokenId) { _safeMintSubDomain(to, tokenId, sub, ""); } function burnSubDomain(uint256 tokenId, string memory sub) external onlyApprovedOrOwner(tokenId) { _burnSubDomain(tokenId, sub); } function _safeMintSubDomain(address to, uint256 tokenId, string memory sub, bytes memory _data) internal { require(to != address(0)); require (bytes(sub).length != 0); require (StringUtil.dotCount(sub) == 0); require (_exists(tokenId)); string memory _sub = StringUtil.toLower(sub); bytes memory _newUri = abi.encodePacked(_sub, ".", _tokenURIs[tokenId]); uint256 _newTokenId = genTokenId(string(_newUri)); uint256 count = StringUtil.dotCount(_tokenURIs[tokenId]); if (count == 1) { _subTokens[tokenId].add(_newTokenId); } if (bytes(_data).length != 0) { _safeMint(to, _newTokenId, _data); } else { _safeMint(to, _newTokenId); } _setTokenURI(_newTokenId, string(_newUri)); emit NewURI(_newTokenId, string(_newUri)); } function _burnSubDomain(uint256 tokenId, string memory sub) internal { string memory _sub = StringUtil.toLower(sub); bytes memory _newUri = abi.encodePacked(_sub, ".", _tokenURIs[tokenId]); uint256 _newTokenId = genTokenId(string(_newUri)); // remove sub tokenIds itself _subTokens[tokenId].remove(_newTokenId); if (bytes(_tokenURIs[_newTokenId]).length != 0) { delete _tokenURIs[_newTokenId]; } super._burn(_newTokenId); } function subTokenIdCount(uint256 tokenId) public view returns (uint256) { require (_exists(tokenId)); return _subTokens[tokenId].length(); } function subTokenIdByIndex(uint256 tokenId, uint256 index) public view returns (uint256) { require (subTokenIdCount(tokenId) > index); return _subTokens[tokenId].at(index); } /** * End:Subdomain */ /** * Begin: System */ function genTokenId(string memory label) public pure returns(uint256) { require (bytes(label).length != 0); return uint256(keccak256(abi.encodePacked(label))); } function withdraw() external payable onlyOwner { require(payable(msg.sender).send(address(this).balance)); } function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal override(ERC721, ERC721Enumerable) { super._beforeTokenTransfer(from, to, tokenId); } function supportsInterface(bytes4 interfaceId) public view override(ERC721, ERC721Enumerable) returns (bool) { return super.supportsInterface(interfaceId); } /** * End: System */ /** * Begin: working with metadata like: avatar, cover, email, phone, address, social ... */ function set( string calldata key, string calldata value, uint256 tokenId ) external onlyApprovedOrOwner(tokenId) { _set(key, value, tokenId); } function setMany( string[] calldata keys, string[] calldata values, uint256 tokenId ) external onlyApprovedOrOwner(tokenId) { _setMany(keys, values, tokenId); } function setByHash( uint256 keyHash, string calldata value, uint256 tokenId ) external override onlyApprovedOrOwner(tokenId) { _setByHash(keyHash, value, tokenId); } function setManyByHash( uint256[] calldata keyHashes, string[] calldata values, uint256 tokenId ) external override onlyApprovedOrOwner(tokenId) { _setManyByHash(keyHashes, values, tokenId); } function reconfigure( string[] calldata keys, string[] calldata values, uint256 tokenId ) external override onlyApprovedOrOwner(tokenId) { _reconfigure(keys, values, tokenId); } function reset(uint256 tokenId) external override onlyApprovedOrOwner(tokenId) { _reset(tokenId); } /** * End: metadata */ }
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Contract Creation Code
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