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"content": "//SPDX-License-Identifier:Unlicensed\n\npragma solidity ^0.8.9;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `recipient`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(\n address recipient,\n uint256 amount\n ) external returns (bool);\n\n /**\n * @dev Returns the remaining number of tokens that `spender` will be\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\n * zero by default.\n *\n * This value changes when {approve} or {transferFrom} are called.\n */\n function allowance(\n address owner,\n address spender\n ) external view returns (uint256);\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\n * that someone may use both the old and the new allowance by unfortunate\n * transaction ordering. One possible solution to mitigate this race\n * condition is to first reduce the spender's allowance to 0 and set the\n * desired value afterwards:\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n *\n * Emits an {Approval} event.\n */\n function approve(address spender, uint256 amount) external returns (bool);\n\n /**\n * @dev Moves `amount` tokens from `sender` to `recipient` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address sender,\n address recipient,\n uint256 amount\n ) external returns (bool);\n\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(\n address indexed owner,\n address indexed spender,\n uint256 value\n );\n}\n\npragma solidity ^0.8.9;\n\n/**\n * @dev Contract module which allows children to implement an emergency stop\n * mechanism that can be triggered by an authorized account.\n *\n * This module is used through inheritance. It will make available the\n * modifiers `whenNotPaused` and `whenPaused`, which can be applied to\n * the functions of your contract. Note that they will not be pausable by\n * simply including this module, only once the modifiers are put in place.\n */\nabstract contract Pausable {\n /**\n * @dev Emitted when the pause is triggered by `account`.\n */\n event Paused(address account);\n\n /**\n * @dev Emitted when the pause is lifted by `account`.\n */\n event Unpaused(address account);\n\n bool private _paused;\n\n /**\n * @dev Initializes the contract in unpaused state.\n */\n constructor() {\n _paused = false;\n }\n\n /**\n * @dev Returns true if the contract is paused, and false otherwise.\n */\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n /**\n * @dev Modifier to make a function callable only when the contract is not paused.\n *\n * Requirements:\n *\n * - The contract must not be paused.\n */\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n /**\n * @dev Modifier to make a function callable only when the contract is paused.\n *\n * Requirements:\n *\n * - The contract must be paused.\n */\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n /**\n * @dev Triggers stopped state.\n *\n * Requirements:\n *\n * - The contract must not be paused.\n */\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n //emit Paused(_msgSender());\n }\n\n /**\n * @dev Returns to normal state.\n *\n * Requirements:\n *\n * - The contract must be paused.\n */\n function _unpause() internal virtual whenPaused {\n _paused = false;\n // emit Unpaused(_msgSender());\n }\n}\npragma solidity ^0.8.9;\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n bytes16 private constant _HEX_SYMBOLS = \"0123456789abcdef\";\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` decimal representation.\n */\n function toString(uint256 value) internal pure returns (string memory) {\n // Inspired by OraclizeAPI's implementation - MIT licence\n // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol\n\n if (value == 0) {\n return \"0\";\n }\n uint256 temp = value;\n uint256 digits;\n while (temp != 0) {\n digits++;\n temp /= 10;\n }\n bytes memory buffer = new bytes(digits);\n while (value != 0) {\n digits -= 1;\n buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));\n value /= 10;\n }\n return string(buffer);\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\n */\n function toHexString(uint256 value) internal pure returns (string memory) {\n if (value == 0) {\n return \"0x00\";\n }\n uint256 temp = value;\n uint256 length = 0;\n while (temp != 0) {\n length++;\n temp >>= 8;\n }\n return toHexString(value, length);\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\n */\n function toHexString(\n uint256 value,\n uint256 length\n ) internal pure returns (string memory) {\n bytes memory buffer = new bytes(2 * length + 2);\n buffer[0] = \"0\";\n buffer[1] = \"x\";\n for (uint256 i = 2 * length + 1; i > 1; --i) {\n buffer[i] = _HEX_SYMBOLS[value & 0xf];\n value >>= 4;\n }\n require(value == 0, \"Strings: hex length insufficient\");\n return string(buffer);\n }\n}\n\n// File: @openzeppelin/contracts/utils/Context.sol\n\npragma solidity ^0.8.9;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n}\n\n// File: @openzeppelin/contracts/access/Ownable.sol\n\npragma solidity ^0.8.9;\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n address private _owner;\n\n event OwnershipTransferred(\n address indexed previousOwner,\n address indexed newOwner\n );\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n constructor() {\n _setOwner(_msgSender());\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions anymore. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby removing any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _setOwner(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(\n newOwner != address(0),\n \"Ownable: new owner is the zero address\"\n );\n _setOwner(newOwner);\n }\n\n function _setOwner(address newOwner) private {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n}\n\n// File: @openzeppelin/contracts/utils/Address.sol\n\npragma solidity ^0.8.9;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize, which returns 0 for contracts in\n // construction, since the code is only stored at the end of the\n // constructor execution.\n\n uint256 size;\n assembly {\n size := extcodesize(account)\n }\n return size > 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(\n address(this).balance >= amount,\n \"Address: insufficient balance\"\n );\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(\n success,\n \"Address: unable to send value, recipient may have reverted\"\n );\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data\n ) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return\n functionCallWithValue(\n target,\n data,\n value,\n \"Address: low-level call with value failed\"\n );\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(\n address(this).balance >= value,\n \"Address: insufficient balance for call\"\n );\n require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(\n data\n );\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data\n ) internal view returns (bytes memory) {\n return\n functionStaticCall(\n target,\n data,\n \"Address: low-level static call failed\"\n );\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data\n ) internal returns (bytes memory) {\n return\n functionDelegateCall(\n target,\n data,\n \"Address: low-level delegate call failed\"\n );\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(isContract(target), \"Address: delegate call to non-contract\");\n\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n // Look for revert reason and bubble it up if present\n if (returndata.length > 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n }\n}\n\n// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol\n\npragma solidity ^0.8.9;\n\n/**\n * @title ERC721 token receiver interface\n * @dev Interface for any contract that wants to support safeTransfers\n * from ERC721 asset contracts.\n */\ninterface IERC721Receiver {\n /**\n * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}\n * by `operator` from `from`, this function is called.\n *\n * It must return its Solidity selector to confirm the token transfer.\n * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.\n *\n * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.\n */\n function onERC721Received(\n address operator,\n address from,\n uint256 tokenId,\n bytes calldata data\n ) external returns (bytes4);\n}\n\n// File: @openzeppelin/contracts/utils/introspection/IERC165.sol\n\npragma solidity ^0.8.9;\n\n/**\n * @dev Interface of the ERC165 standard, as defined in the\n * https://eips.ethereum.org/EIPS/eip-165[EIP].\n *\n * Implementers can declare support of contract interfaces, which can then be\n * queried by others ({ERC165Checker}).\n *\n * For an implementation, see {ERC165}.\n */\ninterface IERC165 {\n /**\n * @dev Returns true if this contract implements the interface defined by\n * `interfaceId`. See the corresponding\n * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\n * to learn more about how these ids are created.\n *\n * This function call must use less than 30 000 gas.\n */\n function supportsInterface(bytes4 interfaceId) external view returns (bool);\n}\n\n// File: @openzeppelin/contracts/utils/introspection/ERC165.sol\n\npragma solidity ^0.8.9;\n\n/**\n * @dev Implementation of the {IERC165} interface.\n *\n * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check\n * for the additional interface id that will be supported. For example:\n *\n * ```solidity\n * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);\n * }\n * ```\n *\n * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.\n */\nabstract contract ERC165 is IERC165 {\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(\n bytes4 interfaceId\n ) public view virtual override returns (bool) {\n return interfaceId == type(IERC165).interfaceId;\n }\n}\n\n// File: @openzeppelin/contracts/token/ERC721/IERC721.sol\n\npragma solidity ^0.8.9;\n\n/**\n * @dev Required interface of an ERC721 compliant contract.\n */\ninterface IERC721 is IERC165 {\n /**\n * @dev Emitted when `tokenId` token is transferred from `from` to `to`.\n */\n event Transfer(\n address indexed from,\n address indexed to,\n uint256 indexed tokenId\n );\n\n /**\n * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.\n */\n event Approval(\n address indexed owner,\n address indexed approved,\n uint256 indexed tokenId\n );\n\n /**\n * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.\n */\n event ApprovalForAll(\n address indexed owner,\n address indexed operator,\n bool approved\n );\n\n /**\n * @dev Returns the number of tokens in ``owner``'s account.\n */\n function balanceOf(address owner) external view returns (uint256 balance);\n\n /**\n * @dev Returns the owner of the `tokenId` token.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n */\n function ownerOf(uint256 tokenId) external view returns (address owner);\n\n /**\n * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n * are aware of the ERC721 protocol to prevent tokens from being forever locked.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `tokenId` token must exist and be owned by `from`.\n * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.\n * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n *\n * Emits a {Transfer} event.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId\n ) external;\n\n /**\n * @dev Transfers `tokenId` token from `from` to `to`.\n *\n * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `tokenId` token must be owned by `from`.\n * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(address from, address to, uint256 tokenId) external;\n\n /**\n * @dev Gives permission to `to` to transfer `tokenId` token to another account.\n * The approval is cleared when the token is transferred.\n *\n * Only a single account can be approved at a time, so approving the zero address clears previous approvals.\n *\n * Requirements:\n *\n * - The caller must own the token or be an approved operator.\n * - `tokenId` must exist.\n *\n * Emits an {Approval} event.\n */\n function approve(address to, uint256 tokenId) external;\n\n /**\n * @dev Returns the account approved for `tokenId` token.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n */\n function getApproved(\n uint256 tokenId\n ) external view returns (address operator);\n\n /**\n * @dev Approve or remove `operator` as an operator for the caller.\n * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.\n *\n * Requirements:\n *\n * - The `operator` cannot be the caller.\n *\n * Emits an {ApprovalForAll} event.\n */\n function setApprovalForAll(address operator, bool _approved) external;\n\n /**\n * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.\n *\n * See {setApprovalForAll}\n */\n function isApprovedForAll(\n address owner,\n address operator\n ) external view returns (bool);\n\n /**\n * @dev Safely transfers `tokenId` token from `from` to `to`.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `tokenId` token must exist and be owned by `from`.\n * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n *\n * Emits a {Transfer} event.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId,\n bytes calldata data\n ) external;\n}\n\n// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol\n\npragma solidity ^0.8.9;\n\n/**\n * @title ERC-721 Non-Fungible Token Standard, optional metadata extension\n * @dev See https://eips.ethereum.org/EIPS/eip-721\n */\ninterface IERC721Metadata is IERC721 {\n /**\n * @dev Returns the token collection name.\n */\n function name() external view returns (string memory);\n\n /**\n * @dev Returns the token collection symbol.\n */\n function symbol() external view returns (string memory);\n\n /**\n * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.\n */\n function tokenURI(uint256 tokenId) external view returns (string memory);\n}\n\npragma solidity ^0.8.9;\n\n// to enable certain compiler features\n\n//import '@openzeppelin/contracts/token/ERC721/ERC721.sol';\n\ncontract ERC721 is Context, ERC165, IERC721, IERC721Metadata {\n using Address for address;\n using Strings for uint256;\n\n // Token name\n string private _name;\n\n // Token symbol\n string private _symbol;\n\n // Mapping from token ID to owner address\n mapping(uint256 => address) private _owners;\n\n // Mapping owner address to token count\n mapping(address => uint256) private _balances;\n\n // Mapping from token ID to approved address\n mapping(uint256 => address) private _tokenApprovals;\n\n // Mapping from owner to operator approvals\n mapping(address => mapping(address => bool)) private _operatorApprovals;\n\n //Mapping para atribuirle un URI para cada token\n mapping(uint256 => string) internal id_to_URI;\n\n /**\n * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.\n */\n constructor(string memory name_, string memory symbol_) {\n _name = name_;\n _symbol = symbol_;\n }\n\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n\n function supportsInterface(\n bytes4 interfaceId\n ) public view virtual override(ERC165, IERC165) returns (bool) {\n return\n interfaceId == type(IERC721).interfaceId ||\n interfaceId == type(IERC721Metadata).interfaceId ||\n super.supportsInterface(interfaceId);\n }\n\n /**\n * @dev See {IERC721-balanceOf}.\n */\n function balanceOf(\n address owner\n ) public view virtual override returns (uint256) {\n require(\n owner != address(0),\n \"ERC721: balance query for the zero address\"\n );\n return _balances[owner];\n }\n\n /**\n * @dev See {IERC721-ownerOf}.\n */\n function ownerOf(\n uint256 tokenId\n ) public view virtual override returns (address) {\n address owner = _owners[tokenId];\n require(\n owner != address(0),\n \"ERC721: owner query for nonexistent token\"\n );\n return owner;\n }\n\n /**\n * @dev See {IERC721Metadata-name}.\n */\n function name() public view virtual override returns (string memory) {\n return _name;\n }\n\n /**\n * @dev See {IERC721Metadata-symbol}.\n */\n function symbol() public view virtual override returns (string memory) {\n return _symbol;\n }\n\n /**\n * @dev See {IERC721Metadata-tokenURI}.\n */\n function tokenURI(\n uint256 tokenId\n ) public view virtual override returns (string memory) {}\n\n /**\n * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each\n * token will be the concatenation of the `baseURI` and the `tokenId`. Empty\n * by default, can be overriden in child contracts.\n */\n function _baseURI() internal view virtual returns (string memory) {\n return \"\";\n }\n\n /**\n * @dev See {IERC721-approve}.\n */\n function approve(address to, uint256 tokenId) public virtual override {\n address owner = ERC721.ownerOf(tokenId);\n require(to != owner, \"ERC721: approval to current owner\");\n\n require(\n _msgSender() == owner || isApprovedForAll(owner, _msgSender()),\n \"ERC721: approve caller is not owner nor approved for all\"\n );\n\n _approve(to, tokenId);\n }\n\n /**\n * @dev See {IERC721-getApproved}.\n */\n function getApproved(\n uint256 tokenId\n ) public view virtual override returns (address) {\n require(\n _exists(tokenId),\n \"ERC721: approved query for nonexistent token\"\n );\n\n return _tokenApprovals[tokenId];\n }\n\n /**\n * @dev See {IERC721-setApprovalForAll}.\n */\n function setApprovalForAll(\n address operator,\n bool approved\n ) public virtual override {\n require(operator != _msgSender(), \"ERC721: approve to caller\");\n\n _operatorApprovals[_msgSender()][operator] = approved;\n emit ApprovalForAll(_msgSender(), operator, approved);\n }\n\n /**\n * @dev See {IERC721-isApprovedForAll}.\n */\n function isApprovedForAll(\n address owner,\n address operator\n ) public view virtual override returns (bool) {\n return _operatorApprovals[owner][operator];\n }\n\n /**\n * @dev See {IERC721-transferFrom}.\n */\n function transferFrom(\n address from,\n address to,\n uint256 tokenId\n ) public virtual override {\n //solhint-disable-next-line max-line-length\n require(\n _isApprovedOrOwner(_msgSender(), tokenId),\n \"ERC721: transfer caller is not owner nor approved\"\n );\n\n _transfer(from, to, tokenId);\n }\n\n /**\n * @dev See {IERC721-safeTransferFrom}.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId\n ) public virtual override {\n safeTransferFrom(from, to, tokenId, \"\");\n }\n\n /**\n * @dev See {IERC721-safeTransferFrom}.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId,\n bytes memory _data\n ) public virtual override {\n require(\n _isApprovedOrOwner(_msgSender(), tokenId),\n \"ERC721: transfer caller is not owner nor approved\"\n );\n _safeTransfer(from, to, tokenId, _data);\n }\n\n /**\n * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n * are aware of the ERC721 protocol to prevent tokens from being forever locked.\n *\n * `_data` is additional data, it has no specified format and it is sent in call to `to`.\n *\n * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.\n * implement alternative mechanisms to perform token transfer, such as signature-based.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `tokenId` token must exist and be owned by `from`.\n * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n *\n * Emits a {Transfer} event.\n */\n function _safeTransfer(\n address from,\n address to,\n uint256 tokenId,\n bytes memory _data\n ) internal virtual {\n _transfer(from, to, tokenId);\n require(\n _checkOnERC721Received(from, to, tokenId, _data),\n \"ERC721: transfer to non ERC721Receiver implementer\"\n );\n }\n\n /**\n * @dev Returns whether `tokenId` exists.\n *\n * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.\n *\n * Tokens start existing when they are minted (`_mint`),\n * and stop existing when they are burned (`_burn`).\n */\n function _exists(uint256 tokenId) internal view virtual returns (bool) {\n return _owners[tokenId] != address(0);\n }\n\n /**\n * @dev Returns whether `spender` is allowed to manage `tokenId`.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n */\n function _isApprovedOrOwner(\n address spender,\n uint256 tokenId\n ) internal view virtual returns (bool) {\n require(\n _exists(tokenId),\n \"ERC721: operator query for nonexistent token\"\n );\n address owner = ERC721.ownerOf(tokenId);\n return (spender == owner ||\n getApproved(tokenId) == spender ||\n isApprovedForAll(owner, spender));\n }\n\n /**\n * @dev Safely mints `tokenId` and transfers it to `to`.\n *\n * Requirements:\n *\n * - `tokenId` must not exist.\n * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n *\n * Emits a {Transfer} event.\n */\n function _safeMint(address to, uint256 tokenId) internal virtual {\n _safeMint(to, tokenId, \"\");\n }\n\n /**\n * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is\n * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.\n */\n function _safeMint(\n address to,\n uint256 tokenId,\n bytes memory _data\n ) internal virtual {\n _mint(to, tokenId);\n require(\n _checkOnERC721Received(address(0), to, tokenId, _data),\n \"ERC721: transfer to non ERC721Receiver implementer\"\n );\n }\n\n /**\n * @dev Mints `tokenId` and transfers it to `to`.\n *\n * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible\n *\n * Requirements:\n *\n * - `tokenId` must not exist.\n * - `to` cannot be the zero address.\n *\n * Emits a {Transfer} event.\n */\n function _mint(address to, uint256 tokenId) internal virtual {\n require(to != address(0), \"ERC721: mint to the zero address\");\n require(!_exists(tokenId), \"ERC721: token already minted\");\n\n _beforeTokenTransfer(address(0), to, tokenId);\n\n _balances[to] += 1;\n _owners[tokenId] = to;\n\n emit Transfer(address(0), to, tokenId);\n }\n\n /**\n * @dev Destroys `tokenId`.\n * The approval is cleared when the token is burned.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n *\n * Emits a {Transfer} event.\n */\n function _burn(uint256 tokenId) internal virtual {\n address owner = ERC721.ownerOf(tokenId);\n\n _beforeTokenTransfer(owner, address(0), tokenId);\n\n // Clear approvals\n _approve(address(0), tokenId);\n\n _balances[owner] -= 1;\n delete _owners[tokenId];\n\n emit Transfer(owner, address(0), tokenId);\n }\n\n /**\n * @dev Transfers `tokenId` from `from` to `to`.\n * As opposed to {transferFrom}, this imposes no restrictions on msg.sender.\n *\n * Requirements:\n *\n * - `to` cannot be the zero address.\n * - `tokenId` token must be owned by `from`.\n *\n * Emits a {Transfer} event.\n */\n function _transfer(\n address from,\n address to,\n uint256 tokenId\n ) internal virtual {\n require(\n ERC721.ownerOf(tokenId) == from,\n \"ERC721: transfer of token that is not own\"\n );\n require(to != address(0), \"ERC721: transfer to the zero address\");\n\n _beforeTokenTransfer(from, to, tokenId);\n\n // Clear approvals from the previous owner\n _approve(address(0), tokenId);\n\n _balances[from] -= 1;\n _balances[to] += 1;\n _owners[tokenId] = to;\n\n emit Transfer(from, to, tokenId);\n }\n\n /**\n * @dev Approve `to` to operate on `tokenId`\n *\n * Emits a {Approval} event.\n */\n function _approve(address to, uint256 tokenId) internal virtual {\n _tokenApprovals[tokenId] = to;\n emit Approval(ERC721.ownerOf(tokenId), to, tokenId);\n }\n\n /**\n * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.\n * The call is not executed if the target address is not a contract.\n *\n * @param from address representing the previous owner of the given token ID\n * @param to target address that will receive the tokens\n * @param tokenId uint256 ID of the token to be transferred\n * @param _data bytes optional data to send along with the call\n * @return bool whether the call correctly returned the expected magic value\n */\n function _checkOnERC721Received(\n address from,\n address to,\n uint256 tokenId,\n bytes memory _data\n ) private returns (bool) {\n if (to.isContract()) {\n try\n IERC721Receiver(to).onERC721Received(\n _msgSender(),\n from,\n tokenId,\n _data\n )\n returns (bytes4 retval) {\n return retval == IERC721Receiver.onERC721Received.selector;\n } catch (bytes memory reason) {\n if (reason.length == 0) {\n revert(\n \"ERC721: transfer to non ERC721Receiver implementer\"\n );\n } else {\n assembly {\n revert(add(32, reason), mload(reason))\n }\n }\n }\n } else {\n return true;\n }\n }\n\n /**\n * @dev Hook that is called before any token transfer. This includes minting\n * and burning.\n *\n * Calling conditions:\n *\n * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be\n * transferred to `to`.\n * - When `from` is zero, `tokenId` will be minted for `to`.\n * - When `to` is zero, ``from``'s `tokenId` will be burned.\n * - `from` and `to` are never both zero.\n *\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n */\n function _beforeTokenTransfer(\n address from,\n address to,\n uint256 tokenId\n ) internal virtual {}\n}\n\n/**\n __ __ _____ _ _ \n \\ \\ / / / ____| | | | | \n \\ \\ /\\ / / __ __ _ _ __ _ __ ___ _ __ | | ___ _ __ | |_ _ __ __ _ ___| |_ \n \\ \\/ \\/ / '__/ _` | '_ \\| '_ \\ / _ \\ '__| | | / _ \\| '_ \\| __| '__/ _` |/ __| __|\n \\ /\\ /| | | (_| | |_) | |_) | __/ | | |___| (_) | | | | |_| | | (_| | (__| |_ \n \\/ \\/ |_| \\__,_| .__/| .__/ \\___|_| \\_____\\___/|_| |_|\\__|_| \\__,_|\\___|\\__|\n | | | | \n |_| |_| \n-> This wrapper can be deployed to migrate a rugged NFT to a new Contract\n-> Original design and coding by JoeSoap8308 (Dev of the Wrapped Companions - https://opensea.io/collection/wrappedcompanion-1) \n-> Wrap and Unwrap code based around the Pudgy Pengiuns Wrapper\n\n\n\n**/\n///Interfaces\ninterface wrapperdb {\n function isBlockedNFT(uint _tokenID) external view returns (bool, uint256);\n\n function isHolder(address _address) external view returns (bool);\n\n function getWrappedStatus(address _migrator) external view returns (bool);\n\n function getArtStatus(uint _tokenid) external view returns (uint);\n\n function setUserStatus(address _wrapper, bool _haswrapped) external;\n\n function manageNumHolders(uint _option) external;\n\n function manageHolderAddresses(bool status, address _holder) external;\n}\n\n///////Start of contract/////\ncontract Wrapper is ERC721, IERC721Receiver, Pausable, Ownable {\n //Events\n event Wrapped(uint256 indexed tokenId);\n event Unwrapped(uint256 indexed tokenId);\n //Variables\n address public ruggedproject = 0xaEab9eCBfae9A0ec5D6035c887D4D115aBcAe1D0; //address of Rugged NFT\n address public dbcontract = 0x902734c7aa00763D4bFeD50feF378fA665A683c9; //address if the DB contract\n address public currentowner; //used to open methods and restrict via address\n address public upgradecontract; //External smart contract to upgrade artwork to future proof the art\n IERC721 immutable ruggednft;\n uint public numwraps; //total wraps\n bool public wrapenabled = true; //Enable/Disable Wrapping\n bool public dynamicart = true; //Bool to enable dynamic art\n string public defaulturi =\n \"ipfs://QmSFRNxTzbAedYqafpMTGUGCzWCiWk3NXaQB2EHih9kbf6/ \"; //Default URI\n string private artpath1; //Global path 1\n string private artpath2; //Global path 2\n ////Mappings/////\n mapping(address => bool) internal artapproved; //Whether a holder has approved their art to be modded\n mapping(uint => string) internal artpathfortoken; //Path for individual tokens\n mapping(uint => bool) internal customtoken; //Used to ad a single ad-hoc artwork update\n /////////////////\n ////Used to get uint256 -> String\n using Strings for uint256;\n\n /////////////////////////////////\n constructor() ERC721(\"Pudgy Penguin Yacht Club\", \"wPPYC\") {\n ruggednft = IERC721(ruggedproject);\n currentowner = msg.sender;\n }\n\n function _baseURI() internal pure override returns (string memory) {\n ///Base URI is the location of the JSON files\n ///As part of the design of the contracts this Base URI Might need to get updated dynamically///\n return \"ipfs://QmSFRNxTzbAedYqafpMTGUGCzWCiWk3NXaQB2EHih9kbf6/ \";\n }\n\n //////Sets the IPFS/Arweave stores for each area\n //////Supports 2 custom Metadata stores,the default and the Custom one\n function setStringArtPaths(\n uint _pathno,\n string memory _path,\n uint _tokenid,\n address _holder\n ) external {\n require(\n msg.sender == currentowner ||\n msg.sender == upgradecontract ||\n msg.sender == dbcontract,\n \"Not Auth!\"\n );\n\n if (_pathno == 0) {\n defaulturi = _path;\n }\n if (_pathno == 1) {\n artpath1 = _path;\n }\n if (_pathno == 2) {\n artpath2 = _path;\n }\n if (_pathno == 3) ////Specify dedicated path for token\n {\n bool temp;\n temp = getArtApproval(_tokenid, _holder);\n require(temp == true, \"Not Approved!\");\n artpathfortoken[_tokenid] = _path;\n customtoken[_tokenid] = true; //User has unique art\n }\n if (_pathno == 4) //resets to default\n {\n customtoken[_tokenid] = false; //Resets user to the global\n }\n }\n\n ///This is being overridder to be able to pass in custom URI's etc\n function tokenURI(\n uint256 tokenId\n ) public view override returns (string memory) {\n string memory tempstring;\n string memory tempstring2;\n if (dynamicart == true) //If disabled...URI reverts to default\n {\n uint temp = wrapperdb(dbcontract).getArtStatus(tokenId);\n //Verify if user has unique art\n bool isunique = customtoken[tokenId];\n ///////////////////////////////////////\n if (isunique == true) ///This is the custom are for 1 token!\n {\n tempstring2 = artpathfortoken[tokenId];\n tempstring = string(\n abi.encodePacked(tempstring2, tokenId.toString(), \"\")\n );\n }\n if (isunique == false) {\n if (temp == 0) {\n tempstring = string(\n abi.encodePacked(defaulturi, tokenId.toString(), \"\")\n );\n }\n if (temp == 1) {\n tempstring = string(\n abi.encodePacked(artpath1, tokenId.toString(), \"\")\n );\n }\n if (temp == 2) {\n tempstring = string(\n abi.encodePacked(artpath2, tokenId.toString(), \"\")\n );\n }\n }\n }\n if (dynamicart == false) {\n tempstring = string(\n abi.encodePacked(defaulturi, tokenId.toString(), \"\")\n );\n }\n return tempstring;\n }\n\n function pause() public onlyOwner {\n _pause();\n }\n\n function unpause() public onlyOwner {\n _unpause();\n }\n\n //Function to allow the user to approve the modification of the the art URI for their token\n function approveArtUpdate(bool _yesorno, uint _tokennumber) external {\n require(msg.sender == ownerOf(_tokennumber), \"Not Authorized\");\n artapproved[msg.sender] = _yesorno; //Mapping to ensure its not at a global level\n }\n\n ///Return the value of the approval status for the DB\n function getArtApproval(\n uint _tokennumber,\n address _wallet\n ) public view returns (bool) {\n address temp = ownerOf(_tokennumber);\n require(temp == _wallet, \"ERR(P)\");\n bool temp2;\n temp2 = artapproved[temp];\n return temp2;\n }\n\n //Configure the various options/addresses for the contract\n function setOptions(\n uint _option,\n bool _onoroff,\n address _address\n ) external onlyOwner {\n if (_option == 1) {\n ruggedproject = _address;\n }\n if (_option == 2) {\n dbcontract = _address;\n }\n if (_option == 3) {\n wrapenabled = _onoroff;\n }\n if (_option == 4) {\n dynamicart = _onoroff;\n }\n if (_option == 5) {\n upgradecontract = _address; //Contract address to adjust the art\n }\n if (_option == 6) {\n currentowner = _address; //Change the current Owner!\n }\n }\n\n /// Wrap the original rugged NFT to get the new NFT.\n function wrap(uint256[] calldata tokenIds_) external {\n uint templength = tokenIds_.length; //Number of tokens to be wrapped\n bool _isblocked;\n bool _isholder;\n uint s;\n require(wrapenabled == true, \"Wrapping is not enabled!\");\n for (uint256 i = 0; i < templength; i++) {\n //Add method in to verify banned ID's (Founders)\n (_isblocked, s) = wrapperdb(dbcontract).isBlockedNFT(tokenIds_[i]);\n require(_isblocked != true, \"Banned Token_ID!\");\n ruggednft.safeTransferFrom(msg.sender, address(this), tokenIds_[i]);\n }\n _isholder = wrapperdb(dbcontract).isHolder(msg.sender); //Determines if user is a new holder and puts in the DB contract\n if (_isholder == false) {\n wrapperdb(dbcontract).manageHolderAddresses(true, msg.sender); ///Sets user as a holder!\n wrapperdb(dbcontract).manageNumHolders(2); ///Bump the holder value\n }\n numwraps += 1;\n }\n\n /// Unwrap to get the original back\n function unwrap(uint256[] calldata tokenIds_) external {\n uint _balance;\n for (uint256 i = 0; i < tokenIds_.length; i++) {\n _safeTransfer(msg.sender, address(this), tokenIds_[i], \"\");\n }\n ////We track the balance of the msg.sender///\n ////If they now own 0 NFT's we remove them as a holder\n _balance = balanceOf(msg.sender);\n if (_balance == 0) {\n ///They no longer hold,we remove///\n wrapperdb(dbcontract).manageHolderAddresses(false, msg.sender); //Remove user as a holder\n wrapperdb(dbcontract).manageNumHolders(1); ///Dump the holder value\n }\n }\n\n function _flip(address who_, bool isWrapping_, uint256 tokenId_) private {\n if (isWrapping_) {\n // Mint wrapped NFT of same tokenID if not yet minted, otherwise swap for existing rugged NFT\n if (_exists(tokenId_) && ownerOf(tokenId_) == address(this)) {\n _safeTransfer(address(this), who_, tokenId_, \"\");\n } else {\n _safeMint(who_, tokenId_);\n }\n emit Wrapped(tokenId_);\n } else {\n ruggednft.safeTransferFrom(address(this), who_, tokenId_);\n emit Unwrapped(tokenId_);\n }\n }\n\n // Notice: You must use safeTransferFrom in order to properly wrap/unwrap your rugged NFT\n function onERC721Received(\n address operator_,\n address from_,\n uint256 tokenId_,\n bytes memory data_\n ) external override returns (bytes4) {\n // Only supports callback from the original rugged contract and this contract\n require(\n msg.sender == address(ruggedproject) || msg.sender == address(this),\n \"must be XXXXX or Wrapped XXXXX\"\n );\n\n bool isWrapping = msg.sender == address(ruggedproject);\n _flip(from_, isWrapping, tokenId_);\n\n return this.onERC721Received.selector;\n }\n\n function _beforeTokenTransfer(\n address from,\n address to,\n uint256 tokenId\n ) internal override whenNotPaused {\n super._beforeTokenTransfer(from, to, tokenId);\n }\n\n fallback() external payable {}\n\n receive() external payable {}\n\n ////This is incase ETH is in the contract\n function withdrawETH() external onlyOwner {\n (bool success, ) = owner().call{value: address(this).balance}(\"\");\n require(success, \"Transfer failed.\");\n }\n\n ////This is incase an ERc20 token is in the contract\n function withdrawERC20(address token) external onlyOwner {\n bool success = IERC20(token).transfer(\n owner(),\n IERC20(token).balanceOf(address(this))\n );\n require(success, \"Transfer failed\");\n }\n\n //Emergency NFT recovery\n function emergencyMintWrapped(uint256 tokenId_) external onlyOwner {\n if (ruggednft.ownerOf(tokenId_) == address(this)) {\n // Contract owns the Companion.\n if (_exists(tokenId_) && ownerOf(tokenId_) == address(this)) {\n // Wrapped nft is also trapped in contract.\n _safeTransfer(address(this), owner(), tokenId_, \"\");\n emit Wrapped(tokenId_);\n } else if (!_exists(tokenId_)) {\n // Wrapped nft hasn't ever been minted.\n _safeMint(owner(), tokenId_);\n emit Wrapped(tokenId_);\n } else {\n revert(\"Wrapped NFT minted and distributed already\");\n }\n } else {\n revert(\"Rugged NFT is not locked in contract\");\n }\n }\n\n //Mint the Tokens that Founders of the XXXXXXX owned\n //Requires any minted tokens to be blocked\n //Mints to another user or the owner\n function mintFoundersBlockedNfts(\n uint256[] calldata tokenIds_,\n uint _mintoption,\n address _to\n ) external onlyOwner {\n uint templength = tokenIds_.length;\n for (uint256 i = 0; i < templength; i++) {\n //Add method in to verify banned ID's (Founders)\n (bool _isblocked, uint s) = wrapperdb(dbcontract).isBlockedNFT(\n tokenIds_[i]\n );\n require(_isblocked == true, \"Not a Banned Token!\");\n if (_mintoption == 1) //Mint to Owner\n {\n _safeMint(owner(), tokenIds_[i]);\n }\n if (_mintoption == 2) //Mint to User\n {\n _safeMint(_to, tokenIds_[i]);\n }\n }\n }\n}\n"
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