Transaction Hash:
Block:
18674975 at Nov-29-2023 04:46:23 AM +UTC
Transaction Fee:
0.00077607979788001 ETH
$2.16
Gas Used:
24,635 Gas / 31.503137726 Gwei
Emitted Events:
274 |
TheToadz.ApprovalForAll( owner=[Sender] 0xe14b4585795befea1b08a4317b46ca218000ac93, operator=0x1E004978...d54003c71, approved=False )
|
Account State Difference:
Address | Before | After | State Difference | ||
---|---|---|---|---|---|
0x1877B833...18bF14813 | |||||
0x4838B106...B0BAD5f97
Miner
| (Titan Builder) | 11.174955446081317824 Eth | 11.174957909581317824 Eth | 0.0000024635 | |
0xe14b4585...18000AC93 |
0.018125395984671568 Eth
Nonce: 3502
|
0.017349316186791558 Eth
Nonce: 3503
| 0.00077607979788001 |
Execution Trace
TheToadz.setApprovalForAll( operator=0x1E0049783F008A0085193E00003D00cd54003c71, approved=False )
1{"Context.sol":{"content":"// SPDX-License-Identifier: MIT\r\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev Provides information about the current execution context, including the\r\n * sender of the transaction and its data. Whilethese are generally available\r\n * via msg.sender and msg.data, they should not be accessed in such a direct\r\n * manner, since when dealing withmeta-transactions the account sending and\r\n * paying for execution may not be the actual sender (as far as an application\r\n * is concerned).\r\n *\r\n * This contract is only required for intermediate, library-like contracts.\r\n */\r\nabstract contract Context {\r\n function_msgSender() internal view virtual returns (address) {\r\n return msg.sender;\r\n }\r\n\r\n function _msgData() internal view virtualreturns (bytes calldata) {\r\n return msg.data;\r\n }\r\n}"},"ERC721A.sol":{"content":"// SPDX-License-Identifier: MIT\r\n// ERC721AContracts v4.2.3\r\n// Creator: Chiru Labs\r\n\r\npragma solidity ^0.8.4;\r\n\r\nimport \u0027./IERC721A.sol\u0027;\r\n\r\n/**\r\n * @dev Interfaceof ERC721 token receiver.\r\n */\r\ninterface ERC721A__IERC721Receiver {\r\n function onERC721Received(\r\n address operator,\r\naddress from,\r\n uint256 tokenId,\r\n bytes calldata data\r\n ) external returns (bytes4);\r\n}\r\n\r\n/**\r\n * @titleERC721A\r\n *\r\n * @dev Implementation of the [ERC721](https://eips.ethereum.org/EIPS/eip-721)\r\n * Non-Fungible Token Standard, including theMetadata extension.\r\n * Optimized for lower gas during batch mints.\r\n *\r\n * Token IDs are minted in sequential order (e.g. 0, 1, 2, 3,...)\r\n * starting from `_startTokenId()`.\r\n *\r\n * Assumptions:\r\n *\r\n * - An owner cannot have more than 2**64 - 1 (max value of uint64)of supply.\r\n * - The maximum token ID cannot exceed 2**256 - 1 (max value of uint256).\r\n */\r\ncontract ERC721A is IERC721A {\r\n // Bypassfor a `--via-ir` bug (https://github.com/chiru-labs/ERC721A/pull/364).\r\n struct TokenApprovalRef {\r\n address value;\r\n }\r\n\r\n// =============================================================\r\n // CONSTANTS\r\n //=============================================================\r\n\r\n // Mask of an entry in packed address data.\r\n uint256 privateconstant _BITMASK_ADDRESS_DATA_ENTRY = (1 \u003c\u003c 64) - 1;\r\n\r\n // The bit position of `numberMinted` in packed address data.\r\nuint256 private constant _BITPOS_NUMBER_MINTED = 64;\r\n\r\n // The bit position of `numberBurned` in packed address data.\r\n uint256private constant _BITPOS_NUMBER_BURNED = 128;\r\n\r\n // The bit position of `aux` in packed address data.\r\n uint256 private constant_BITPOS_AUX = 192;\r\n\r\n // Mask of all 256 bits in packed address data except the 64 bits for `aux`.\r\n uint256 private constant_BITMASK_AUX_COMPLEMENT = (1 \u003c\u003c 192) - 1;\r\n\r\n // The bit position of `startTimestamp` in packed ownership.\r\n uint256 privateconstant _BITPOS_START_TIMESTAMP = 160;\r\n\r\n // The bit mask of the `burned` bit in packed ownership.\r\n uint256 private constant_BITMASK_BURNED = 1 \u003c\u003c 224;\r\n\r\n // The bit position of the `nextInitialized` bit in packed ownership.\r\n uint256 privateconstant _BITPOS_NEXT_INITIALIZED = 225;\r\n\r\n // The bit mask of the `nextInitialized` bit in packed ownership.\r\n uint256 privateconstant _BITMASK_NEXT_INITIALIZED = 1 \u003c\u003c 225;\r\n\r\n // The bit position of `extraData` in packed ownership.\r\n uint256 privateconstant _BITPOS_EXTRA_DATA = 232;\r\n\r\n // Mask of all 256 bits in a packed ownership except the 24 bits for `extraData`.\r\n uint256private constant _BITMASK_EXTRA_DATA_COMPLEMENT = (1 \u003c\u003c 232) - 1;\r\n\r\n // The mask of the lower 160 bits for addresses.\r\nuint256 private constant _BITMASK_ADDRESS = (1 \u003c\u003c 160) - 1;\r\n\r\n // The maximum `quantity` that can be minted with {_mintERC2309}.\r\n // This limit is to prevent overflows on the address data entries.\r\n // For a limit of 5000, a total of 3.689e15 calls to{_mintERC2309}\r\n // is required to cause an overflow, which is unrealistic.\r\n uint256 private constant _MAX_MINT_ERC2309_QUANTITY_LIMIT =5000;\r\n\r\n // The `Transfer` event signature is given by:\r\n // `keccak256(bytes(\"Transfer(address,address,uint256)\"))`.\r\n bytes32private constant _TRANSFER_EVENT_SIGNATURE =\r\n 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef;\r\n\r\n //=============================================================\r\n // STORAGE\r\n //=============================================================\r\n\r\n // The next token ID to be minted.\r\n uint256 private _currentIndex;\r\n\r\n // The number of tokens burned.\r\n uint256 private _burnCounter;\r\n\r\n // Token name\r\n string private _name;\r\n\r\n// Token symbol\r\n string private _symbol;\r\n\r\n // Mapping from token ID to ownership details\r\n // An empty struct value does notnecessarily mean the token is unowned.\r\n // See {_packedOwnershipOf} implementation for details.\r\n //\r\n // Bits Layout:\r\n // -[0..159] `addr`\r\n // - [160..223] `startTimestamp`\r\n // - [224] `burned`\r\n // - [225] `nextInitialized`\r\n // - [232..255] `extraData`\r\n mapping(uint256 =\u003e uint256) private _packedOwnerships;\r\n\r\n // Mapping owner address to address data.\r\n//\r\n // Bits Layout:\r\n // - [0..63] `balance`\r\n // - [64..127] `numberMinted`\r\n // - [128..191] `numberBurned`\r\n // -[192..255] `aux`\r\n mapping(address =\u003e uint256) private _packedAddressData;\r\n\r\n // Mapping from token ID to approved address.\r\nmapping(uint256 =\u003e TokenApprovalRef) private _tokenApprovals;\r\n\r\n // Mapping from owner to operator approvals\r\n mapping(address=\u003e mapping(address =\u003e bool)) private _operatorApprovals;\r\n\r\n // =============================================================\r\n// CONSTRUCTOR\r\n // =============================================================\r\n\r\n constructor(stringmemory name_, string memory symbol_) {\r\n _name = name_;\r\n _symbol = symbol_;\r\n _currentIndex = _startTokenId();\r\n}\r\n\r\n // =============================================================\r\n // TOKEN COUNTING OPERATIONS\r\n //=============================================================\r\n\r\n /**\r\n * @dev Returns the starting token ID.\r\n * To change thestarting token ID, please override this function.\r\n */\r\n function _startTokenId() internal view virtual returns (uint256) {\r\nreturn 0;\r\n }\r\n\r\n /**\r\n * @dev Returns the next token ID to be minted.\r\n */\r\n function _nextTokenId() internal viewvirtual returns (uint256) {\r\n return _currentIndex;\r\n }\r\n\r\n /**\r\n * @dev Returns the total number of tokens in existence.\r\n * Burned tokens will reduce the count.\r\n * To get the total number of tokens minted, please see {_totalMinted}.\r\n */\r\nfunction totalSupply() public view virtual override returns (uint256) {\r\n // Counter underflow is impossible as _burnCounter cannot beincremented\r\n // more than `_currentIndex - _startTokenId()` times.\r\n unchecked {\r\n return _currentIndex -_burnCounter - _startTokenId();\r\n }\r\n }\r\n\r\n /**\r\n * @dev Returns the total amount of tokens minted in the contract.\r\n*/\r\n function _totalMinted() internal view virtual returns (uint256) {\r\n // Counter underflow is impossible as `_currentIndex`does not decrement,\r\n // and it is initialized to `_startTokenId()`.\r\n unchecked {\r\n return _currentIndex -_startTokenId();\r\n }\r\n }\r\n\r\n /**\r\n * @dev Returns the total number of tokens burned.\r\n */\r\n function_totalBurned() internal view virtual returns (uint256) {\r\n return _burnCounter;\r\n }\r\n\r\n //=============================================================\r\n // ADDRESS DATA OPERATIONS\r\n //=============================================================\r\n\r\n /**\r\n * @dev Returns the number of tokens in `owner`\u0027s account.\r\n */\r\n function balanceOf(address owner) public view virtual override returns (uint256) {\r\n if (owner == address(0)) revertBalanceQueryForZeroAddress();\r\n return _packedAddressData[owner] \u0026 _BITMASK_ADDRESS_DATA_ENTRY;\r\n }\r\n\r\n /**\r\n *Returns the number of tokens minted by `owner`.\r\n */\r\n function _numberMinted(address owner) internal view returns (uint256) {\r\nreturn (_packedAddressData[owner] \u003e\u003e _BITPOS_NUMBER_MINTED) \u0026 _BITMASK_ADDRESS_DATA_ENTRY;\r\n }\r\n\r\n /**\r\n *Returns the number of tokens burned by or on behalf of `owner`.\r\n */\r\n function _numberBurned(address owner) internal view returns(uint256) {\r\n return (_packedAddressData[owner] \u003e\u003e _BITPOS_NUMBER_BURNED) \u0026 _BITMASK_ADDRESS_DATA_ENTRY;\r\n }\r\n\r\n/**\r\n * Returns the auxiliary data for `owner`. (e.g. number of whitelist mint slots used).\r\n */\r\n function _getAux(addressowner) internal view returns (uint64) {\r\n return uint64(_packedAddressData[owner] \u003e\u003e _BITPOS_AUX);\r\n }\r\n\r\n /**\r\n* Sets the auxiliary data for `owner`. (e.g. number of whitelist mint slots used).\r\n * If there are multiple variables, please pack theminto a uint64.\r\n */\r\n function _setAux(address owner, uint64 aux) internal virtual {\r\n uint256 packed =_packedAddressData[owner];\r\n uint256 auxCasted;\r\n // Cast `aux` with assembly to avoid redundant masking.\r\n assembly{\r\n auxCasted := aux\r\n }\r\n packed = (packed \u0026 _BITMASK_AUX_COMPLEMENT) | (auxCasted \u003c\u003c _BITPOS_AUX);\r\n _packedAddressData[owner] = packed;\r\n }\r\n\r\n // =============================================================\r\n //IERC165\r\n // =============================================================\r\n\r\n /**\r\n * @dev Returns trueif this contract implements the interface defined by\r\n * `interfaceId`. See the corresponding\r\n * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)\r\n * to learn more about how these ids are created.\r\n *\r\n * This function callmust use less than 30000 gas.\r\n */\r\n function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\r\n// The interface IDs are constants representing the first 4 bytes\r\n // of the XOR of all function selectors in the interface.\r\n// See: [ERC165](https://eips.ethereum.org/EIPS/eip-165)\r\n // (e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)`)\r\nreturn\r\n interfaceId == 0x01ffc9a7 || // ERC165 interface ID for ERC165.\r\n interfaceId == 0x80ac58cd || // ERC165interface ID for ERC721.\r\n interfaceId == 0x5b5e139f; // ERC165 interface ID for ERC721Metadata.\r\n }\r\n\r\n //=============================================================\r\n // IERC721Metadata\r\n //=============================================================\r\n\r\n /**\r\n * @dev Returns the token collection name.\r\n */\r\nfunction name() public view virtual override returns (string memory) {\r\n return _name;\r\n }\r\n\r\n /**\r\n * @dev Returns thetoken collection symbol.\r\n */\r\n function symbol() public view virtual override returns (string memory) {\r\n return _symbol;\r\n}\r\n\r\n /**\r\n * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.\r\n */\r\n function tokenURI(uint256tokenId) public view virtual override returns (string memory) {\r\n if (!_exists(tokenId)) revert URIQueryForNonexistentToken();\r\n\r\nstring memory baseURI = _baseURI();\r\n return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, _toString(tokenId))) :\u0027\u0027;\r\n }\r\n\r\n /**\r\n * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each\r\n * token will bethe concatenation of the `baseURI` and the `tokenId`. Empty\r\n * by default, it can be overridden in child contracts.\r\n */\r\nfunction _baseURI() internal view virtual returns (string memory) {\r\n return \u0027\u0027;\r\n }\r\n\r\n //=============================================================\r\n // OWNERSHIPS OPERATIONS\r\n //=============================================================\r\n\r\n /**\r\n * @dev Returns the owner of the `tokenId` token.\r\n *\r\n* Requirements:\r\n *\r\n * - `tokenId` must exist.\r\n */\r\n function ownerOf(uint256 tokenId) public view virtual overridereturns (address) {\r\n return address(uint160(_packedOwnershipOf(tokenId)));\r\n }\r\n\r\n /**\r\n * @dev Gas spent here startsoff proportional to the maximum mint batch size.\r\n * It gradually moves to O(1) as tokens get transferred around over time.\r\n */\r\nfunction _ownershipOf(uint256 tokenId) internal view virtual returns (TokenOwnership memory) {\r\n return _unpackedOwnership(_packedOwnershipOf(tokenId));\r\n }\r\n\r\n /**\r\n * @dev Returns the unpacked `TokenOwnership` struct at `index`.\r\n */\r\nfunction _ownershipAt(uint256 index) internal view virtual returns (TokenOwnership memory) {\r\n return _unpackedOwnership(_packedOwnerships[index]);\r\n }\r\n\r\n /**\r\n * @dev Initializes the ownership slot minted at `index` for efficiency purposes.\r\n*/\r\n function _initializeOwnershipAt(uint256 index) internal virtual {\r\n if (_packedOwnerships[index] == 0) {\r\n_packedOwnerships[index] = _packedOwnershipOf(index);\r\n }\r\n }\r\n\r\n /**\r\n * Returns the packed ownership data of `tokenId`.\r\n */\r\n function _packedOwnershipOf(uint256 tokenId) private view returns (uint256) {\r\n uint256 curr = tokenId;\r\n\r\nunchecked {\r\n if (_startTokenId() \u003c= curr)\r\n if (curr \u003c _currentIndex) {\r\n uint256packed = _packedOwnerships[curr];\r\n // If not burned.\r\n if (packed \u0026 _BITMASK_BURNED == 0) {\r\n// Invariant:\r\n // There will always be an initialized ownership slot\r\n // (i.e. `ownership.addr != address(0) \u0026\u0026 ownership.burned == false`)\r\n // before an unintialized ownership slot\r\n// (i.e. `ownership.addr == address(0) \u0026\u0026 ownership.burned == false`)\r\n // Hence, `curr`will not underflow.\r\n //\r\n // We can directly compare the packed value.\r\n// If the address is zero, packed will be zero.\r\n while (packed == 0) {\r\n packed =_packedOwnerships[--curr];\r\n }\r\n return packed;\r\n }\r\n }\r\n}\r\n revert OwnerQueryForNonexistentToken();\r\n }\r\n\r\n /**\r\n * @dev Returns the unpacked `TokenOwnership` structfrom `packed`.\r\n */\r\n function _unpackedOwnership(uint256 packed) private pure returns (TokenOwnership memory ownership) {\r\nownership.addr = address(uint160(packed));\r\n ownership.startTimestamp = uint64(packed \u003e\u003e _BITPOS_START_TIMESTAMP);\r\nownership.burned = packed \u0026 _BITMASK_BURNED != 0;\r\n ownership.extraData = uint24(packed \u003e\u003e _BITPOS_EXTRA_DATA);\r\n}\r\n\r\n /**\r\n * @dev Packs ownership data into a single uint256.\r\n */\r\n function _packOwnershipData(address owner, uint256flags) private view returns (uint256 result) {\r\n assembly {\r\n // Mask `owner` to the lower 160 bits, in case the upper bitssomehow aren\u0027t clean.\r\n owner := and(owner, _BITMASK_ADDRESS)\r\n // `owner | (block.timestamp \u003c\u003c_BITPOS_START_TIMESTAMP) | flags`.\r\n result := or(owner, or(shl(_BITPOS_START_TIMESTAMP, timestamp()), flags))\r\n }\r\n}\r\n\r\n /**\r\n * @dev Returns the `nextInitialized` flag set if `quantity` equals 1.\r\n */\r\n function _nextInitializedFlag(uint256 quantity) private pure returns (uint256 result) {\r\n // For branchless setting of the `nextInitialized` flag.\r\n assembly{\r\n // `(quantity == 1) \u003c\u003c _BITPOS_NEXT_INITIALIZED`.\r\n result := shl(_BITPOS_NEXT_INITIALIZED, eq(quantity, 1))\r\n }\r\n }\r\n\r\n // =============================================================\r\n // APPROVALOPERATIONS\r\n // =============================================================\r\n\r\n /**\r\n * @dev Gives permission to `to` totransfer `tokenId` token to another account.\r\n * The approval is cleared when the token is transferred.\r\n *\r\n * Only a singleaccount can be approved at a time, so approving the\r\n * zero address clears previous approvals.\r\n *\r\n * Requirements:\r\n*\r\n * - The caller must own the token or be an approved operator.\r\n * - `tokenId` must exist.\r\n *\r\n * Emits an {Approval}event.\r\n */\r\n function approve(address to, uint256 tokenId) public payable virtual override {\r\n address owner = ownerOf(tokenId);\r\n\r\n if (_msgSenderERC721A() != owner)\r\n if (!isApprovedForAll(owner, _msgSenderERC721A())) {\r\n revertApprovalCallerNotOwnerNorApproved();\r\n }\r\n\r\n _tokenApprovals[tokenId].value = to;\r\n emit Approval(owner, to,tokenId);\r\n }\r\n\r\n /**\r\n * @dev Returns the account approved for `tokenId` token.\r\n *\r\n * Requirements:\r\n *\r\n* - `tokenId` must exist.\r\n */\r\n function getApproved(uint256 tokenId) public view virtual override returns (address) {\r\nif (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();\r\n\r\n return _tokenApprovals[tokenId].value;\r\n }\r\n\r\n /**\r\n* @dev Approve or remove `operator` as an operator for the caller.\r\n * Operators can call {transferFrom} or {safeTransferFrom}\r\n *for any token owned by the caller.\r\n *\r\n * Requirements:\r\n *\r\n * - The `operator` cannot be the caller.\r\n *\r\n *Emits an {ApprovalForAll} event.\r\n */\r\n function setApprovalForAll(address operator, bool approved) public virtual override {\r\n_operatorApprovals[_msgSenderERC721A()][operator] = approved;\r\n emit ApprovalForAll(_msgSenderERC721A(), operator, approved);\r\n}\r\n\r\n /**\r\n * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.\r\n *\r\n * See{setApprovalForAll}.\r\n */\r\n function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {\r\nreturn _operatorApprovals[owner][operator];\r\n }\r\n\r\n /**\r\n * @dev Returns whether `tokenId` exists.\r\n *\r\n *Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.\r\n *\r\n * Tokens start existing when theyare minted. See {_mint}.\r\n */\r\n function _exists(uint256 tokenId) internal view virtual returns (bool) {\r\n return\r\n_startTokenId() \u003c= tokenId \u0026\u0026\r\n tokenId \u003c _currentIndex \u0026\u0026 // If within bounds,\r\n_packedOwnerships[tokenId] \u0026 _BITMASK_BURNED == 0; // and not burned.\r\n }\r\n\r\n /**\r\n * @dev Returns whether `msgSender` isequal to `approvedAddress` or `owner`.\r\n */\r\n function _isSenderApprovedOrOwner(\r\n address approvedAddress,\r\n addressowner,\r\n address msgSender\r\n ) private pure returns (bool result) {\r\n assembly {\r\n // Mask `owner` to the lower160 bits, in case the upper bits somehow aren\u0027t clean.\r\n owner := and(owner, _BITMASK_ADDRESS)\r\n // Mask `msgSender`to the lower 160 bits, in case the upper bits somehow aren\u0027t clean.\r\n msgSender := and(msgSender, _BITMASK_ADDRESS)\r\n// `msgSender == owner || msgSender == approvedAddress`.\r\n result := or(eq(msgSender, owner), eq(msgSender, approvedAddress))\r\n}\r\n }\r\n\r\n /**\r\n * @dev Returns the storage slot and value for the approved address of `tokenId`.\r\n */\r\n function_getApprovedSlotAndAddress(uint256 tokenId)\r\n private\r\n view\r\n returns (uint256 approvedAddressSlot, addressapprovedAddress)\r\n {\r\n TokenApprovalRef storage tokenApproval = _tokenApprovals[tokenId];\r\n // The following is equivalentto `approvedAddress = _tokenApprovals[tokenId].value`.\r\n assembly {\r\n approvedAddressSlot := tokenApproval.slot\r\napprovedAddress := sload(approvedAddressSlot)\r\n }\r\n }\r\n\r\n //=============================================================\r\n // TRANSFER OPERATIONS\r\n //=============================================================\r\n\r\n /**\r\n * @dev Transfers `tokenId` from `from` to `to`.\r\n *\r\n* Requirements:\r\n *\r\n * - `from` cannot be the zero address.\r\n * - `to` cannot be the zero address.\r\n * - `tokenId`token must be owned by `from`.\r\n * - If the caller is not `from`, it must be approved to move this token\r\n * by either {approve} or{setApprovalForAll}.\r\n *\r\n * Emits a {Transfer} event.\r\n */\r\n function transferFrom(\r\n address from,\r\naddress to,\r\n uint256 tokenId\r\n ) public payable virtual override {\r\n uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);\r\n\r\n if (address(uint160(prevOwnershipPacked)) != from) revert TransferFromIncorrectOwner();\r\n\r\n (uint256approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);\r\n\r\n // The nested ifs save around 20+ gas over acompound boolean condition.\r\n if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))\r\n if(!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();\r\n\r\n if (to == address(0)) revertTransferToZeroAddress();\r\n\r\n _beforeTokenTransfers(from, to, tokenId, 1);\r\n\r\n // Clear approvals from the previous owner.\r\nassembly {\r\n if approvedAddress {\r\n // This is equivalent to `delete _tokenApprovals[tokenId]`.\r\nsstore(approvedAddressSlot, 0)\r\n }\r\n }\r\n\r\n // Underflow of the sender\u0027s balance is impossible because wecheck for\r\n // ownership above and the recipient\u0027s balance can\u0027t realistically overflow.\r\n // Counter overflow isincredibly unrealistic as `tokenId` would have to be 2**256.\r\n unchecked {\r\n // We can directly increment and decrement thebalances.\r\n --_packedAddressData[from]; // Updates: `balance -= 1`.\r\n ++_packedAddressData[to]; // Updates: `balance +=1`.\r\n\r\n // Updates:\r\n // - `address` to the next owner.\r\n // - `startTimestamp` to the timestamp oftransfering.\r\n // - `burned` to `false`.\r\n // - `nextInitialized` to `true`.\r\n _packedOwnerships[tokenId] =_packOwnershipData(\r\n to,\r\n _BITMASK_NEXT_INITIALIZED | _nextExtraData(from, to, prevOwnershipPacked)\r\n);\r\n\r\n // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .\r\n if(prevOwnershipPacked \u0026 _BITMASK_NEXT_INITIALIZED == 0) {\r\n uint256 nextTokenId = tokenId + 1;\r\n // If thenext slot\u0027s address is zero and not burned (i.e. packed value is zero).\r\n if (_packedOwnerships[nextTokenId] == 0) {\r\n// If the next slot is within bounds.\r\n if (nextTokenId != _currentIndex) {\r\n //Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.\r\n _packedOwnerships[nextTokenId] =prevOwnershipPacked;\r\n }\r\n }\r\n }\r\n }\r\n\r\n emit Transfer(from, to, tokenId);\r\n _afterTokenTransfers(from, to, tokenId, 1);\r\n }\r\n\r\n /**\r\n * @dev Equivalent to `safeTransferFrom(from, to, tokenId,\u0027\u0027)`.\r\n */\r\n function safeTransferFrom(\r\n address from,\r\n address to,\r\n uint256 tokenId\r\n )public payable virtual override {\r\n safeTransferFrom(from, to, tokenId, \u0027\u0027);\r\n }\r\n\r\n /**\r\n * @dev Safelytransfers `tokenId` token from `from` to `to`.\r\n *\r\n * Requirements:\r\n *\r\n * - `from` cannot be the zero address.\r\n *- `to` cannot be the zero address.\r\n * - `tokenId` token must exist and be owned by `from`.\r\n * - If the caller is not `from`, it mustbe approved to move this token\r\n * by either {approve} or {setApprovalForAll}.\r\n * - If `to` refers to a smart contract, it mustimplement\r\n * {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\r\n *\r\n * Emits a {Transfer} event.\r\n*/\r\n function safeTransferFrom(\r\n address from,\r\n address to,\r\n uint256 tokenId,\r\n bytes memory _data\r\n) public payable virtual override {\r\n transferFrom(from, to, tokenId);\r\n if (to.code.length != 0)\r\n if(!_checkContractOnERC721Received(from, to, tokenId, _data)) {\r\n revert TransferToNonERC721ReceiverImplementer();\r\n}\r\n }\r\n\r\n /**\r\n * @dev Hook that is called before a set of serially-ordered token IDs\r\n * are about to be transferred. Thisincludes minting.\r\n * And also called before burning one token.\r\n *\r\n * `startTokenId` - the first token ID to be transferred.\r\n * `quantity` - the amount to be transferred.\r\n *\r\n * Calling conditions:\r\n *\r\n * - When `from` and `to` are bothnon-zero, `from`\u0027s `tokenId` will be\r\n * transferred to `to`.\r\n * - When `from` is zero, `tokenId` will be minted for `to`.\r\n* - When `to` is zero, `tokenId` will be burned by `from`.\r\n * - `from` and `to` are never both zero.\r\n */\r\n function_beforeTokenTransfers(\r\n address from,\r\n address to,\r\n uint256 startTokenId,\r\n uint256 quantity\r\n )internal virtual {}\r\n\r\n /**\r\n * @dev Hook that is called after a set of serially-ordered token IDs\r\n * have been transferred.This includes minting.\r\n * And also called after one token has been burned.\r\n *\r\n * `startTokenId` - the first token ID to betransferred.\r\n * `quantity` - the amount to be transferred.\r\n *\r\n * Calling conditions:\r\n *\r\n * - When `from` and`to` are both non-zero, `from`\u0027s `tokenId` has been\r\n * transferred to `to`.\r\n * - When `from` is zero, `tokenId` has been mintedfor `to`.\r\n * - When `to` is zero, `tokenId` has been burned by `from`.\r\n * - `from` and `to` are never both zero.\r\n */\r\nfunction _afterTokenTransfers(\r\n address from,\r\n address to,\r\n uint256 startTokenId,\r\n uint256 quantity\r\n) internal virtual {}\r\n\r\n /**\r\n * @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target contract.\r\n*\r\n * `from` - Previous owner of the given token ID.\r\n * `to` - Target address that will receive the token.\r\n * `tokenId` - TokenID to be transferred.\r\n * `_data` - Optional data to send along with the call.\r\n *\r\n * Returns whether the call correctlyreturned the expected magic value.\r\n */\r\n function _checkContractOnERC721Received(\r\n address from,\r\n address to,\r\nuint256 tokenId,\r\n bytes memory _data\r\n ) private returns (bool) {\r\n try ERC721A__IERC721Receiver(to).onERC721Received(_msgSenderERC721A(), from, tokenId, _data) returns (\r\n bytes4 retval\r\n ) {\r\n return retval ==ERC721A__IERC721Receiver(to).onERC721Received.selector;\r\n } catch (bytes memory reason) {\r\n if (reason.length == 0) {\r\nrevert TransferToNonERC721ReceiverImplementer();\r\n } else {\r\n assembly {\r\n revert(add(32, reason), mload(reason))\r\n }\r\n }\r\n }\r\n }\r\n\r\n //=============================================================\r\n // MINT OPERATIONS\r\n //=============================================================\r\n\r\n /**\r\n * @dev Mints `quantity` tokens and transfers them to `to`.\r\n*\r\n * Requirements:\r\n *\r\n * - `to` cannot be the zero address.\r\n * - `quantity` must be greater than 0.\r\n *\r\n* Emits a {Transfer} event for each mint.\r\n */\r\n function _mint(address to, uint256 quantity) internal virtual {\r\n uint256startTokenId = _currentIndex;\r\n if (quantity == 0) revert MintZeroQuantity();\r\n\r\n _beforeTokenTransfers(address(0), to,startTokenId, quantity);\r\n\r\n // Overflows are incredibly unrealistic.\r\n // `balance` and `numberMinted` have a maximum limit of2**64.\r\n // `tokenId` has a maximum limit of 2**256.\r\n unchecked {\r\n // Updates:\r\n // - `balance +=quantity`.\r\n // - `numberMinted += quantity`.\r\n //\r\n // We can directly add to the `balance` and`numberMinted`.\r\n _packedAddressData[to] += quantity * ((1 \u003c\u003c _BITPOS_NUMBER_MINTED) | 1);\r\n\r\n // Updates:\r\n // - `address` to the owner.\r\n // - `startTimestamp` to the timestamp of minting.\r\n // - `burned` to`false`.\r\n // - `nextInitialized` to `quantity == 1`.\r\n _packedOwnerships[startTokenId] = _packOwnershipData(\r\nto,\r\n _nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)\r\n );\r\n\r\n uint256toMasked;\r\n uint256 end = startTokenId + quantity;\r\n\r\n // Use assembly to loop and emit the `Transfer` event for gassavings.\r\n // The duplicated `log4` removes an extra check and reduces stack juggling.\r\n // The assembly, together withthe surrounding Solidity code, have been\r\n // delicately arranged to nudge the compiler into producing optimized opcodes.\r\nassembly {\r\n // Mask `to` to the lower 160 bits, in case the upper bits somehow aren\u0027t clean.\r\n toMasked:= and(to, _BITMASK_ADDRESS)\r\n // Emit the `Transfer` event.\r\n log4(\r\n 0, // Start of data(0, since no data).\r\n 0, // End of data (0, since no data).\r\n _TRANSFER_EVENT_SIGNATURE, // Signature.\r\n 0, // `address(0)`.\r\n toMasked, // `to`.\r\n startTokenId // `tokenId`.\r\n)\r\n\r\n // The `iszero(eq(,))` check ensures that large values of `quantity`\r\n // that overflows uint256will make the loop run out of gas.\r\n // The compiler will optimize the `iszero` away for performance.\r\n for {\r\nlet tokenId := add(startTokenId, 1)\r\n } iszero(eq(tokenId, end)) {\r\n tokenId := add(tokenId, 1)\r\n } {\r\n // Emit the `Transfer` event. Similar to above.\r\n log4(0, 0,_TRANSFER_EVENT_SIGNATURE, 0, toMasked, tokenId)\r\n }\r\n }\r\n if (toMasked == 0) revert MintToZeroAddress();\r\n\r\n _currentIndex = end;\r\n }\r\n _afterTokenTransfers(address(0), to, startTokenId, quantity);\r\n }\r\n\r\n/**\r\n * @dev Mints `quantity` tokens and transfers them to `to`.\r\n *\r\n * This function is intended for efficient minting onlyduring contract creation.\r\n *\r\n * It emits only one {ConsecutiveTransfer} as defined in\r\n * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309),\r\n * instead of a sequence of {Transfer} event(s).\r\n *\r\n * Calling this function outside of contract creationWILL make your contract\r\n * non-compliant with the ERC721 standard.\r\n * For full ERC721 compliance, substituting ERC721 {Transfer}event(s) with the ERC2309\r\n * {ConsecutiveTransfer} event is only permissible during contract creation.\r\n *\r\n * Requirements:\r\n*\r\n * - `to` cannot be the zero address.\r\n * - `quantity` must be greater than 0.\r\n *\r\n * Emits a {ConsecutiveTransfer}event.\r\n */\r\n function _mintERC2309(address to, uint256 quantity) internal virtual {\r\n uint256 startTokenId = _currentIndex;\r\n if (to == address(0)) revert MintToZeroAddress();\r\n if (quantity == 0) revert MintZeroQuantity();\r\n if (quantity\u003e _MAX_MINT_ERC2309_QUANTITY_LIMIT) revert MintERC2309QuantityExceedsLimit();\r\n\r\n _beforeTokenTransfers(address(0), to,startTokenId, quantity);\r\n\r\n // Overflows are unrealistic due to the above check for `quantity` to be below the limit.\r\nunchecked {\r\n // Updates:\r\n // - `balance += quantity`.\r\n // - `numberMinted += quantity`.\r\n//\r\n // We can directly add to the `balance` and `numberMinted`.\r\n _packedAddressData[to] += quantity * ((1 \u003c\u003c_BITPOS_NUMBER_MINTED) | 1);\r\n\r\n // Updates:\r\n // - `address` to the owner.\r\n // - `startTimestamp` to thetimestamp of minting.\r\n // - `burned` to `false`.\r\n // - `nextInitialized` to `quantity == 1`.\r\n_packedOwnerships[startTokenId] = _packOwnershipData(\r\n to,\r\n _nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)\r\n );\r\n\r\n emit ConsecutiveTransfer(startTokenId, startTokenId + quantity - 1, address(0), to);\r\n\r\n _currentIndex = startTokenId + quantity;\r\n }\r\n _afterTokenTransfers(address(0), to, startTokenId, quantity);\r\n }\r\n\r\n /**\r\n * @dev Safely mints `quantity` tokens and transfers them to `to`.\r\n *\r\n * Requirements:\r\n*\r\n * - If `to` refers to a smart contract, it must implement\r\n * {IERC721Receiver-onERC721Received}, which is called for each safetransfer.\r\n * - `quantity` must be greater than 0.\r\n *\r\n * See {_mint}.\r\n *\r\n * Emits a {Transfer} event for eachmint.\r\n */\r\n function _safeMint(\r\n address to,\r\n uint256 quantity,\r\n bytes memory _data\r\n ) internalvirtual {\r\n _mint(to, quantity);\r\n\r\n unchecked {\r\n if (to.code.length != 0) {\r\n uint256 end =_currentIndex;\r\n uint256 index = end - quantity;\r\n do {\r\n if(!_checkContractOnERC721Received(address(0), to, index++, _data)) {\r\n revert TransferToNonERC721ReceiverImplementer();\r\n}\r\n } while (index \u003c end);\r\n // Reentrancy protection.\r\n if(_currentIndex != end) revert();\r\n }\r\n }\r\n }\r\n\r\n /**\r\n * @dev Equivalent to `_safeMint(to, quantity,\u0027\u0027)`.\r\n */\r\n function _safeMint(address to, uint256 quantity) internal virtual {\r\n _safeMint(to, quantity,\u0027\u0027);\r\n }\r\n\r\n // =============================================================\r\n // BURNOPERATIONS\r\n // =============================================================\r\n\r\n /**\r\n * @dev Equivalent to `_burn(tokenId,false)`.\r\n */\r\n function _burn(uint256 tokenId) internal virtual {\r\n _burn(tokenId, false);\r\n }\r\n\r\n /**\r\n *@dev Destroys `tokenId`.\r\n * The approval is cleared when the token is burned.\r\n *\r\n * Requirements:\r\n *\r\n * -`tokenId` must exist.\r\n *\r\n * Emits a {Transfer} event.\r\n */\r\n function _burn(uint256 tokenId, bool approvalCheck) internalvirtual {\r\n uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);\r\n\r\n address from = address(uint160(prevOwnershipPacked));\r\n\r\n (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);\r\n\r\n if (approvalCheck){\r\n // The nested ifs save around 20+ gas over a compound boolean condition.\r\n if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))\r\n if (!isApprovedForAll(from, _msgSenderERC721A())) revertTransferCallerNotOwnerNorApproved();\r\n }\r\n\r\n _beforeTokenTransfers(from, address(0), tokenId, 1);\r\n\r\n // Clearapprovals from the previous owner.\r\n assembly {\r\n if approvedAddress {\r\n // This is equivalent to `delete_tokenApprovals[tokenId]`.\r\n sstore(approvedAddressSlot, 0)\r\n }\r\n }\r\n\r\n // Underflow of thesender\u0027s balance is impossible because we check for\r\n // ownership above and the recipient\u0027s balance can\u0027t realisticallyoverflow.\r\n // Counter overflow is incredibly unrealistic as `tokenId` would have to be 2**256.\r\n unchecked {\r\n //Updates:\r\n // - `balance -= 1`.\r\n // - `numberBurned += 1`.\r\n //\r\n // We can directly decrementthe balance, and increment the number burned.\r\n // This is equivalent to `packed -= 1; packed += 1 \u003c\u003c _BITPOS_NUMBER_BURNED;`.\r\n _packedAddressData[from] += (1 \u003c\u003c _BITPOS_NUMBER_BURNED) - 1;\r\n\r\n // Updates:\r\n // -`address` to the last owner.\r\n // - `startTimestamp` to the timestamp of burning.\r\n // - `burned` to `true`.\r\n// - `nextInitialized` to `true`.\r\n _packedOwnerships[tokenId] = _packOwnershipData(\r\n from,\r\n(_BITMASK_BURNED | _BITMASK_NEXT_INITIALIZED) | _nextExtraData(from, address(0), prevOwnershipPacked)\r\n );\r\n\r\n // Ifthe next slot may not have been initialized (i.e. `nextInitialized == false`) .\r\n if (prevOwnershipPacked \u0026_BITMASK_NEXT_INITIALIZED == 0) {\r\n uint256 nextTokenId = tokenId + 1;\r\n // If the next slot\u0027s address iszero and not burned (i.e. packed value is zero).\r\n if (_packedOwnerships[nextTokenId] == 0) {\r\n // If thenext slot is within bounds.\r\n if (nextTokenId != _currentIndex) {\r\n // Initialize the next slot tomaintain correctness for `ownerOf(tokenId + 1)`.\r\n _packedOwnerships[nextTokenId] = prevOwnershipPacked;\r\n}\r\n }\r\n }\r\n }\r\n\r\n emit Transfer(from, address(0), tokenId);\r\n _afterTokenTransfers(from, address(0), tokenId, 1);\r\n\r\n // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.\r\n unchecked{\r\n _burnCounter++;\r\n }\r\n }\r\n\r\n // =============================================================\r\n //EXTRA DATA OPERATIONS\r\n // =============================================================\r\n\r\n /**\r\n * @dev Directlysets the extra data for the ownership data `index`.\r\n */\r\n function _setExtraDataAt(uint256 index, uint24 extraData) internal virtual{\r\n uint256 packed = _packedOwnerships[index];\r\n if (packed == 0) revert OwnershipNotInitializedForExtraData();\r\nuint256 extraDataCasted;\r\n // Cast `extraData` with assembly to avoid redundant masking.\r\n assembly {\r\nextraDataCasted := extraData\r\n }\r\n packed = (packed \u0026 _BITMASK_EXTRA_DATA_COMPLEMENT) | (extraDataCasted \u003c\u003c_BITPOS_EXTRA_DATA);\r\n _packedOwnerships[index] = packed;\r\n }\r\n\r\n /**\r\n * @dev Called during each token transfer to setthe 24bit `extraData` field.\r\n * Intended to be overridden by the cosumer contract.\r\n *\r\n * `previousExtraData` - the value of`extraData` before transfer.\r\n *\r\n * Calling conditions:\r\n *\r\n * - When `from` and `to` are both non-zero, `from`\u0027s`tokenId` will be\r\n * transferred to `to`.\r\n * - When `from` is zero, `tokenId` will be minted for `to`.\r\n * - When `to` is zero,`tokenId` will be burned by `from`.\r\n * - `from` and `to` are never both zero.\r\n */\r\n function _extraData(\r\n address from,\r\n address to,\r\n uint24 previousExtraData\r\n ) internal view virtual returns (uint24) {}\r\n\r\n /**\r\n * @devReturns the next extra data for the packed ownership data.\r\n * The returned result is shifted into position.\r\n */\r\n function_nextExtraData(\r\n address from,\r\n address to,\r\n uint256 prevOwnershipPacked\r\n ) private view returns (uint256){\r\n uint24 extraData = uint24(prevOwnershipPacked \u003e\u003e _BITPOS_EXTRA_DATA);\r\n return uint256(_extraData(from, to,extraData)) \u003c\u003c _BITPOS_EXTRA_DATA;\r\n }\r\n\r\n // =============================================================\r\n //OTHER OPERATIONS\r\n // =============================================================\r\n\r\n /**\r\n * @dev Returns themessage sender (defaults to `msg.sender`).\r\n *\r\n * If you are writing GSN compatible contracts, you need to override this function.\r\n*/\r\n function _msgSenderERC721A() internal view virtual returns (address) {\r\n return msg.sender;\r\n }\r\n\r\n /**\r\n* @dev Converts a uint256 to its ASCII string decimal representation.\r\n */\r\n function _toString(uint256 value) internal pure virtualreturns (string memory str) {\r\n assembly {\r\n // The maximum value of a uint256 contains 78 digits (1 byte per digit), but\r\n// we allocate 0xa0 bytes to keep the free memory pointer 32-byte word aligned.\r\n // We will need 1 word for the trailingzeros padding, 1 word for the length,\r\n // and 3 words for a maximum of 78 digits. Total: 5 * 0x20 = 0xa0.\r\n let m := add(mload(0x40), 0xa0)\r\n // Update the free memory pointer to allocate.\r\n mstore(0x40, m)\r\n // Assign the `str`to the end.\r\n str := sub(m, 0x20)\r\n // Zeroize the slot after the string.\r\n mstore(str, 0)\r\n\r\n// Cache the end of the memory to calculate the length later.\r\n let end := str\r\n\r\n // We write the string fromrightmost digit to leftmost digit.\r\n // The following is essentially a do-while loop that also handles the zero case.\r\n// prettier-ignore\r\n for { let temp := value } 1 {} {\r\n str := sub(str, 1)\r\n // Write the characterto the pointer.\r\n // The ASCII index of the \u00270\u0027 character is 48.\r\n mstore8(str, add(48, mod(temp, 10)))\r\n // Keep dividing `temp` until zero.\r\n temp := div(temp, 10)\r\n // prettier-ignore\r\nif iszero(temp) { break }\r\n }\r\n\r\n let length := sub(end, str)\r\n // Move the pointer 32 bytesleftwards to make room for the length.\r\n str := sub(str, 0x20)\r\n // Store the length.\r\n mstore(str, length)\r\n }\r\n }\r\n}"},"IERC721A.sol":{"content":"// SPDX-License-Identifier: MIT\r\n// ERC721A Contracts v4.2.3\r\n// Creator: ChiruLabs\r\n\r\npragma solidity ^0.8.4;\r\n\r\n/**\r\n * @dev Interface of ERC721A.\r\n */\r\ninterface IERC721A {\r\n /**\r\n * The caller mustown the token or be an approved operator.\r\n */\r\n error ApprovalCallerNotOwnerNorApproved();\r\n\r\n /**\r\n * The token does notexist.\r\n */\r\n error ApprovalQueryForNonexistentToken();\r\n\r\n /**\r\n * Cannot query the balance for the zero address.\r\n*/\r\n error BalanceQueryForZeroAddress();\r\n\r\n /**\r\n * Cannot mint to the zero address.\r\n */\r\n error MintToZeroAddress();\r\n\r\n /**\r\n * The quantity of tokens minted must be more than zero.\r\n */\r\n error MintZeroQuantity();\r\n\r\n /**\r\n* The token does not exist.\r\n */\r\n error OwnerQueryForNonexistentToken();\r\n\r\n /**\r\n * The caller must own the token orbe an approved operator.\r\n */\r\n error TransferCallerNotOwnerNorApproved();\r\n\r\n /**\r\n * The token must be owned by `from`.\r\n */\r\n error TransferFromIncorrectOwner();\r\n\r\n /**\r\n * Cannot safely transfer to a contract that does not implementthe\r\n * ERC721Receiver interface.\r\n */\r\n error TransferToNonERC721ReceiverImplementer();\r\n\r\n /**\r\n * Cannot transferto the zero address.\r\n */\r\n error TransferToZeroAddress();\r\n\r\n /**\r\n * The token does not exist.\r\n */\r\n errorURIQueryForNonexistentToken();\r\n\r\n /**\r\n * The `quantity` minted with ERC2309 exceeds the safety limit.\r\n */\r\n errorMintERC2309QuantityExceedsLimit();\r\n\r\n /**\r\n * The `extraData` cannot be set on an unintialized ownership slot.\r\n */\r\nerror OwnershipNotInitializedForExtraData();\r\n\r\n // =============================================================\r\n //STRUCTS\r\n // =============================================================\r\n\r\n struct TokenOwnership {\r\n // Theaddress of the owner.\r\n address addr;\r\n // Stores the start time of ownership with minimal overhead for tokenomics.\r\nuint64 startTimestamp;\r\n // Whether the token has been burned.\r\n bool burned;\r\n // Arbitrary data similar to`startTimestamp` that can be set via {_extraData}.\r\n uint24 extraData;\r\n }\r\n\r\n //=============================================================\r\n // TOKEN COUNTERS\r\n //=============================================================\r\n\r\n /**\r\n * @dev Returns the total number of tokens in existence.\r\n* Burned tokens will reduce the count.\r\n * To get the total number of tokens minted, please see {_totalMinted}.\r\n */\r\n functiontotalSupply() external view returns (uint256);\r\n\r\n // =============================================================\r\n //IERC165\r\n // =============================================================\r\n\r\n /**\r\n * @dev Returns true if thiscontract implements the interface defined by\r\n * `interfaceId`. See the corresponding\r\n * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)\r\n * to learn more about how these ids are created.\r\n *\r\n * This function call must useless than 30000 gas.\r\n */\r\n function supportsInterface(bytes4 interfaceId) external view returns (bool);\r\n\r\n //=============================================================\r\n // IERC721\r\n //=============================================================\r\n\r\n /**\r\n * @dev Emitted when `tokenId` token is transferred from `from`to `to`.\r\n */\r\n event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);\r\n\r\n /**\r\n * @dev Emittedwhen `owner` enables `approved` to manage the `tokenId` token.\r\n */\r\n event Approval(address indexed owner, address indexed approved,uint256 indexed tokenId);\r\n\r\n /**\r\n * @dev Emitted when `owner` enables or disables\r\n * (`approved`) `operator` to manage all ofits assets.\r\n */\r\n event ApprovalForAll(address indexed owner, address indexed operator, bool approved);\r\n\r\n /**\r\n * @devReturns the number of tokens in `owner`\u0027s account.\r\n */\r\n function balanceOf(address owner) external view returns (uint256 balance);\r\n\r\n /**\r\n * @dev Returns the owner of the `tokenId` token.\r\n *\r\n * Requirements:\r\n *\r\n * - `tokenId` mustexist.\r\n */\r\n function ownerOf(uint256 tokenId) external view returns (address owner);\r\n\r\n /**\r\n * @dev Safely transfers`tokenId` token from `from` to `to`,\r\n * checking first that contract recipients are aware of the ERC721 protocol\r\n * to prevent tokensfrom being forever locked.\r\n *\r\n * Requirements:\r\n *\r\n * - `from` cannot be the zero address.\r\n * - `to` cannot bethe zero address.\r\n * - `tokenId` token must exist and be owned by `from`.\r\n * - If the caller is not `from`, it must be have beenallowed to move\r\n * this token by either {approve} or {setApprovalForAll}.\r\n * - If `to` refers to a smart contract, it mustimplement\r\n * {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\r\n *\r\n * Emits a {Transfer} event.\r\n*/\r\n function safeTransferFrom(\r\n address from,\r\n address to,\r\n uint256 tokenId,\r\n bytes calldatadata\r\n ) external payable;\r\n\r\n /**\r\n * @dev Equivalent to `safeTransferFrom(from, to, tokenId, \u0027\u0027)`.\r\n */\r\nfunction safeTransferFrom(\r\n address from,\r\n address to,\r\n uint256 tokenId\r\n ) external payable;\r\n\r\n /**\r\n* @dev Transfers `tokenId` from `from` to `to`.\r\n *\r\n * WARNING: Usage of this method is discouraged, use {safeTransferFrom}\r\n* whenever possible.\r\n *\r\n * Requirements:\r\n *\r\n * - `from` cannot be the zero address.\r\n * - `to` cannot be thezero address.\r\n * - `tokenId` token must be owned by `from`.\r\n * - If the caller is not `from`, it must be approved to move thistoken\r\n * by either {approve} or {setApprovalForAll}.\r\n *\r\n * Emits a {Transfer} event.\r\n */\r\n function transferFrom(\r\n address from,\r\n address to,\r\n uint256 tokenId\r\n ) external payable;\r\n\r\n /**\r\n * @dev Givespermission to `to` to transfer `tokenId` token to another account.\r\n * The approval is cleared when the token is transferred.\r\n *\r\n* Only a single account can be approved at a time, so approving the\r\n * zero address clears previous approvals.\r\n *\r\n *Requirements:\r\n *\r\n * - The caller must own the token or be an approved operator.\r\n * - `tokenId` must exist.\r\n *\r\n *Emits an {Approval} event.\r\n */\r\n function approve(address to, uint256 tokenId) external payable;\r\n\r\n /**\r\n * @dev Approveor remove `operator` as an operator for the caller.\r\n * Operators can call {transferFrom} or {safeTransferFrom}\r\n * for any token ownedby the caller.\r\n *\r\n * Requirements:\r\n *\r\n * - The `operator` cannot be the caller.\r\n *\r\n * Emits an{ApprovalForAll} event.\r\n */\r\n function setApprovalForAll(address operator, bool _approved) external;\r\n\r\n /**\r\n * @devReturns the account approved for `tokenId` token.\r\n *\r\n * Requirements:\r\n *\r\n * - `tokenId` must exist.\r\n */\r\nfunction getApproved(uint256 tokenId) external view returns (address operator);\r\n\r\n /**\r\n * @dev Returns if the `operator` is allowedto manage all of the assets of `owner`.\r\n *\r\n * See {setApprovalForAll}.\r\n */\r\n function isApprovedForAll(address owner,address operator) external view returns (bool);\r\n\r\n // =============================================================\r\n //IERC721Metadata\r\n // =============================================================\r\n\r\n /**\r\n * @dev Returns the tokencollection name.\r\n */\r\n function name() external view returns (string memory);\r\n\r\n /**\r\n * @dev Returns the tokencollection symbol.\r\n */\r\n function symbol() external view returns (string memory);\r\n\r\n /**\r\n * @dev Returns the UniformResource Identifier (URI) for `tokenId` token.\r\n */\r\n function tokenURI(uint256 tokenId) external view returns (string memory);\r\n\r\n// =============================================================\r\n // IERC2309\r\n //=============================================================\r\n\r\n /**\r\n * @dev Emitted when tokens in `fromTokenId` to `toTokenId`\r\n* (inclusive) is transferred from `from` to `to`, as defined in the\r\n * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309) standard.\r\n*\r\n * See {_mintERC2309} for more details.\r\n */\r\n event ConsecutiveTransfer(uint256 indexed fromTokenId, uint256 toTokenId,address indexed from, address indexed to);\r\n}"},"Math.sol":{"content":"// SPDX-License-Identifier: MIT\r\n// OpenZeppelin Contracts (last updatedv4.8.0) (utils/math/Math.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev Standard math utilities missing in the Solidity language.\r\n*/\r\nlibrary Math {\r\n enum Rounding {\r\n Down, // Toward negative infinity\r\n Up, // Toward infinity\r\n Zero //Toward zero\r\n }\r\n\r\n /**\r\n * @dev Returns the largest of two numbers.\r\n */\r\n function max(uint256 a, uint256 b)internal pure returns (uint256) {\r\n return a \u003e b ? a : b;\r\n }\r\n\r\n /**\r\n * @dev Returns the smallest of two numbers.\r\n */\r\n function min(uint256 a, uint256 b) internal pure returns (uint256) {\r\n return a \u003c b ? a : b;\r\n }\r\n\r\n/**\r\n * @dev Returns the average of two numbers. The result is rounded towards\r\n * zero.\r\n */\r\n function average(uint256 a,uint256 b) internal pure returns (uint256) {\r\n // (a + b) / 2 can overflow.\r\n return (a \u0026 b) + (a ^ b) / 2;\r\n }\r\n\r\n/**\r\n * @dev Returns the ceiling of the division of two numbers.\r\n *\r\n * This differs from standard division with `/` in thatit rounds up instead\r\n * of rounding down.\r\n */\r\n function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {\r\n// (a + b - 1) / b can overflow on addition, so we distribute.\r\n return a == 0 ? 0 : (a - 1) / b + 1;\r\n }\r\n\r\n /**\r\n* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0\r\n * @devOriginal credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)\r\n * with further edits by Uniswap Labs also under MITlicense.\r\n */\r\n function mulDiv(\r\n uint256 x,\r\n uint256 y,\r\n uint256 denominator\r\n ) internal purereturns (uint256 result) {\r\n unchecked {\r\n // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod2^256 - 1, then use\r\n // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256\r\n// variables such that product = prod1 * 2^256 + prod0.\r\n uint256 prod0; // Least significant 256 bits of the product\r\nuint256 prod1; // Most significant 256 bits of the product\r\n assembly {\r\n let mm := mulmod(x, y, not(0))\r\nprod0 := mul(x, y)\r\n prod1 := sub(sub(mm, prod0), lt(mm, prod0))\r\n }\r\n\r\n // Handle non-overflow cases, 256 by 256 division.\r\n if (prod1 == 0) {\r\n return prod0 / denominator;\r\n }\r\n\r\n// Make sure the result is less than 2^256. Also prevents denominator == 0.\r\n require(denominator \u003e prod1);\r\n\r\n///////////////////////////////////////////////\r\n // 512 by 256 division.\r\n///////////////////////////////////////////////\r\n\r\n // Make division exact by subtracting the remainder from [prod1 prod0].\r\nuint256 remainder;\r\n assembly {\r\n // Compute remainder using mulmod.\r\n remainder := mulmod(x,y, denominator)\r\n\r\n // Subtract 256 bit number from 512 bit number.\r\n prod1 := sub(prod1, gt(remainder, prod0))\r\n prod0 := sub(prod0, remainder)\r\n }\r\n\r\n // Factor powers of two out of denominator and computelargest power of two divisor of denominator. Always \u003e= 1.\r\n // See https://cs.stackexchange.com/q/138556/92363.\r\n\r\n// Does not overflow because the denominator cannot be zero at this stage in the function.\r\n uint256 twos = denominator \u0026(~denominator + 1);\r\n assembly {\r\n // Divide denominator by twos.\r\n denominator := div(denominator,twos)\r\n\r\n // Divide [prod1 prod0] by twos.\r\n prod0 := div(prod0, twos)\r\n\r\n // Flip twos suchthat it is 2^256 / twos. If twos is zero, then it becomes one.\r\n twos := add(div(sub(0, twos), twos), 1)\r\n }\r\n\r\n// Shift in bits from prod1 into prod0.\r\n prod0 |= prod1 * twos;\r\n\r\n // Invert denominator mod 2^256. Nowthat denominator is an odd number, it has an inverse modulo 2^256 such\r\n // that denominator * inv = 1 mod 2^256. Compute the inverseby starting with a seed that is correct for\r\n // four bits. That is, denominator * inv = 1 mod 2^4.\r\n uint256 inverse =(3 * denominator) ^ 2;\r\n\r\n // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel\u0027s lifting lemma, thisalso works\r\n // in modular arithmetic, doubling the correct bits in each step.\r\n inverse *= 2 - denominator * inverse; //inverse mod 2^8\r\n inverse *= 2 - denominator * inverse; // inverse mod 2^16\r\n inverse *= 2 - denominator * inverse; //inverse mod 2^32\r\n inverse *= 2 - denominator * inverse; // inverse mod 2^64\r\n inverse *= 2 - denominator * inverse; //inverse mod 2^128\r\n inverse *= 2 - denominator * inverse; // inverse mod 2^256\r\n\r\n // Because the division is now exactwe can divide by multiplying with the modular inverse of denominator.\r\n // This will give us the correct result modulo 2^256. Sincethe preconditions guarantee that the outcome is\r\n // less than 2^256, this is the final result. We don\u0027t need to compute the highbits of the result and prod1\r\n // is no longer required.\r\n result = prod0 * inverse;\r\n return result;\r\n}\r\n }\r\n\r\n /**\r\n * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.\r\n*/\r\n function mulDiv(\r\n uint256 x,\r\n uint256 y,\r\n uint256 denominator,\r\n Rounding rounding\r\n )internal pure returns (uint256) {\r\n uint256 result = mulDiv(x, y, denominator);\r\n if (rounding == Rounding.Up \u0026\u0026 mulmod(x, y, denominator) \u003e 0) {\r\n result += 1;\r\n }\r\n return result;\r\n }\r\n\r\n /**\r\n * @dev Returnsthe square root of a number. If the number is not a perfect square, the value is rounded down.\r\n *\r\n * Inspired by Henry S. Warren, Jr.\u0027s \"Hacker\u0027s Delight\" (Chapter 11).\r\n */\r\n function sqrt(uint256 a) internal pure returns (uint256) {\r\n if (a == 0) {\r\n return 0;\r\n }\r\n\r\n // For our first guess, we get the biggest power of 2 which is smaller than the squareroot of the target.\r\n //\r\n // We know that the \"msb\" (most significant bit) of our target number `a` is a power of 2 such thatwe have\r\n // `msb(a) \u003c= a \u003c 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.\r\n //\r\n //This can be rewritten `2**log2(a) \u003c= a \u003c 2**(log2(a) + 1)`\r\n // → `sqrt(2**k) \u003c= sqrt(a) \u003c sqrt(2**(k+1))`\r\n// → `2**(k/2) \u003c= sqrt(a) \u003c 2**((k+1)/2) \u003c= 2**(k/2 + 1)`\r\n //\r\n // Consequently, `2**(log2(a) / 2)` is a goodfirst approximation of `sqrt(a)` with at least 1 correct bit.\r\n uint256 result = 1 \u003c\u003c (log2(a) \u003e\u003e 1);\r\n\r\n// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,\r\n // since it is the squareroot of a uint256. Newton\u0027s method converges quadratically (precision doubles at\r\n // every iteration). We thus need at most 7iteration to turn our partial result with one bit of precision\r\n // into the expected uint128 result.\r\n unchecked {\r\nresult = (result + a / result) \u003e\u003e 1;\r\n result = (result + a / result) \u003e\u003e 1;\r\n result = (result + a/ result) \u003e\u003e 1;\r\n result = (result + a / result) \u003e\u003e 1;\r\n result = (result + a / result) \u003e\u003e1;\r\n result = (result + a / result) \u003e\u003e 1;\r\n result = (result + a / result) \u003e\u003e 1;\r\nreturn min(result, a / result);\r\n }\r\n }\r\n\r\n /**\r\n * @notice Calculates sqrt(a), following the selected roundingdirection.\r\n */\r\n function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {\r\n unchecked {\r\nuint256 result = sqrt(a);\r\n return result + (rounding == Rounding.Up \u0026\u0026 result * result \u003c a ? 1 : 0);\r\n }\r\n}\r\n\r\n /**\r\n * @dev Return the log in base 2, rounded down, of a positive value.\r\n * Returns 0 if given 0.\r\n */\r\nfunction log2(uint256 value) internal pure returns (uint256) {\r\n uint256 result = 0;\r\n unchecked {\r\n if (value\u003e\u003e 128 \u003e 0) {\r\n value \u003e\u003e= 128;\r\n result += 128;\r\n }\r\n if(value \u003e\u003e 64 \u003e 0) {\r\n value \u003e\u003e= 64;\r\n result += 64;\r\n }\r\n if(value \u003e\u003e 32 \u003e 0) {\r\n value \u003e\u003e= 32;\r\n result += 32;\r\n }\r\n if(value \u003e\u003e 16 \u003e 0) {\r\n value \u003e\u003e= 16;\r\n result += 16;\r\n }\r\n if(value \u003e\u003e 8 \u003e 0) {\r\n value \u003e\u003e= 8;\r\n result += 8;\r\n }\r\n if(value \u003e\u003e 4 \u003e 0) {\r\n value \u003e\u003e= 4;\r\n result += 4;\r\n }\r\n if(value \u003e\u003e 2 \u003e 0) {\r\n value \u003e\u003e= 2;\r\n result += 2;\r\n }\r\n if(value \u003e\u003e 1 \u003e 0) {\r\n result += 1;\r\n }\r\n }\r\n return result;\r\n }\r\n\r\n/**\r\n * @dev Return the log in base 2, following the selected rounding direction, of a positive value.\r\n * Returns 0 if given 0.\r\n*/\r\n function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {\r\n unchecked {\r\n uint256 result= log2(value);\r\n return result + (rounding == Rounding.Up \u0026\u0026 1 \u003c\u003c result \u003c value ? 1 : 0);\r\n }\r\n}\r\n\r\n /**\r\n * @dev Return the log in base 10, rounded down, of a positive value.\r\n * Returns 0 if given 0.\r\n */\r\nfunction log10(uint256 value) internal pure returns (uint256) {\r\n uint256 result = 0;\r\n unchecked {\r\n if (value\u003e= 10**64) {\r\n value /= 10**64;\r\n result += 64;\r\n }\r\n if (value \u003e= 10**32){\r\n value /= 10**32;\r\n result += 32;\r\n }\r\n if (value \u003e= 10**16) {\r\nvalue /= 10**16;\r\n result += 16;\r\n }\r\n if (value \u003e= 10**8) {\r\n value /= 10**8;\r\n result += 8;\r\n }\r\n if (value \u003e= 10**4) {\r\n value /= 10**4;\r\nresult += 4;\r\n }\r\n if (value \u003e= 10**2) {\r\n value /= 10**2;\r\n result += 2;\r\n}\r\n if (value \u003e= 10**1) {\r\n result += 1;\r\n }\r\n }\r\n return result;\r\n}\r\n\r\n /**\r\n * @dev Return the log in base 10, following the selected rounding direction, of a positive value.\r\n * Returns 0 ifgiven 0.\r\n */\r\n function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {\r\n unchecked {\r\nuint256 result = log10(value);\r\n return result + (rounding == Rounding.Up \u0026\u0026 10**result \u003c value ? 1 : 0);\r\n}\r\n }\r\n\r\n /**\r\n * @dev Return the log in base 256, rounded down, of a positive value.\r\n * Returns 0 if given 0.\r\n*\r\n * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.\r\n */\r\nfunction log256(uint256 value) internal pure returns (uint256) {\r\n uint256 result = 0;\r\n unchecked {\r\n if (value\u003e\u003e 128 \u003e 0) {\r\n value \u003e\u003e= 128;\r\n result += 16;\r\n }\r\n if (value\u003e\u003e 64 \u003e 0) {\r\n value \u003e\u003e= 64;\r\n result += 8;\r\n }\r\n if (value\u003e\u003e 32 \u003e 0) {\r\n value \u003e\u003e= 32;\r\n result += 4;\r\n }\r\n if (value\u003e\u003e 16 \u003e 0) {\r\n value \u003e\u003e= 16;\r\n result += 2;\r\n }\r\n if (value\u003e\u003e 8 \u003e 0) {\r\n result += 1;\r\n }\r\n }\r\n return result;\r\n }\r\n\r\n /**\r\n* @dev Return the log in base 10, following the selected rounding direction, of a positive value.\r\n * Returns 0 if given 0.\r\n */\r\nfunction log256(uint256 value, Rounding rounding) internal pure returns (uint256) {\r\n unchecked {\r\n uint256 result = log256(value);\r\n return result + (rounding == Rounding.Up \u0026\u0026 1 \u003c\u003c (result * 8) \u003c value ? 1 : 0);\r\n }\r\n}\r\n}"},"Ownable.sol":{"content":"// SPDX-License-Identifier: MIT\r\n// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\nimport \"./Context.sol\";\r\n\r\n/**\r\n * @dev Contract module which provides a basic access controlmechanism, where\r\n * there is an account (an owner) that can be granted exclusive access to\r\n * specific functions.\r\n *\r\n * By default, theowner account will be the one that deploys the contract. This\r\n * can later be changed with {transferOwnership}.\r\n *\r\n * This module is usedthrough inheritance. It will make available the modifier\r\n * `onlyOwner`, which can be applied to your functions to restrict their use to\r\n *the owner.\r\n */\r\nabstract contract Ownable is Context {\r\n address private _owner;\r\n\r\n event OwnershipTransferred(address indexedpreviousOwner, address indexed newOwner);\r\n\r\n /**\r\n * @dev Initializes the contract setting the deployer as the initial owner.\r\n*/\r\n constructor() {\r\n _transferOwnership(_msgSender());\r\n }\r\n\r\n /**\r\n * @dev Throws if called by any accountother than the owner.\r\n */\r\n modifier onlyOwner() {\r\n _checkOwner();\r\n _;\r\n }\r\n\r\n /**\r\n * @devReturns the address of the current owner.\r\n */\r\n function owner() public view virtual returns (address) {\r\n return _owner;\r\n}\r\n\r\n /**\r\n * @dev Throws if the sender is not the owner.\r\n */\r\n function _checkOwner() internal view virtual {\r\nrequire(owner() == _msgSender(), \"Ownable: caller is not the owner\");\r\n }\r\n\r\n /**\r\n * @dev Leaves the contract without owner. It will not be possible to call\r\n * `onlyOwner` functions anymore. Can only be called by the current owner.\r\n *\r\n * NOTE:Renouncing ownership will leave the contract without an owner,\r\n * thereby removing any functionality that is only available to the owner.\r\n */\r\n function renounceOwnership() public virtual onlyOwner {\r\n _transferOwnership(address(0));\r\n }\r\n\r\n /**\r\n* @dev Transfers ownership of the contract to a new account (`newOwner`).\r\n * Can only be called by the current owner.\r\n */\r\nfunction transferOwnership(address newOwner) public virtual onlyOwner {\r\n require(newOwner != address(0), \"Ownable: new owner is the zeroaddress\");\r\n _transferOwnership(newOwner);\r\n }\r\n\r\n /**\r\n * @dev Transfers ownership of the contract to a new account(`newOwner`).\r\n * Internal function without access restriction.\r\n */\r\n function _transferOwnership(address newOwner) internalvirtual {\r\n address oldOwner = _owner;\r\n _owner = newOwner;\r\n emit OwnershipTransferred(oldOwner, newOwner);\r\n}\r\n}"},"Strings.sol":{"content":"// SPDX-License-Identifier: MIT\r\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)\r\n\r\npragma solidity ^0.8.0;\r\n\r\nimport \"./Math.sol\";\r\n\r\n/**\r\n * @dev String operations.\r\n */\r\nlibrary Strings {\r\n bytes16private constant _SYMBOLS = \"0123456789abcdef\";\r\n uint8 private constant _ADDRESS_LENGTH = 20;\r\n\r\n /**\r\n * @dev Converts a`uint256` to its ASCII `string` decimal representation.\r\n */\r\n function toString(uint256 value) internal pure returns (string memory){\r\n unchecked {\r\n uint256 length = Math.log10(value) + 1;\r\n string memory buffer = new string(length);\r\nuint256 ptr;\r\n /// @solidity memory-safe-assembly\r\n assembly {\r\n ptr := add(buffer, add(32, length))\r\n }\r\n while (true) {\r\n ptr--;\r\n /// @solidity memory-safe-assembly\r\nassembly {\r\n mstore8(ptr, byte(mod(value, 10), _SYMBOLS))\r\n }\r\n value /= 10;\r\nif (value == 0) break;\r\n }\r\n return buffer;\r\n }\r\n }\r\n\r\n /**\r\n * @dev Converts a`uint256` to its ASCII `string` hexadecimal representation.\r\n */\r\n function toHexString(uint256 value) internal pure returns (stringmemory) {\r\n unchecked {\r\n return toHexString(value, Math.log256(value) + 1);\r\n }\r\n }\r\n\r\n /**\r\n *@dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\r\n */\r\n function toHexString(uint256 value,uint256 length) internal pure returns (string memory) {\r\n bytes memory buffer = new bytes(2 * length + 2);\r\n buffer[0] = \"0\";\r\n buffer[1] = \"x\";\r\n for (uint256 i = 2 * length + 1; i \u003e 1; --i) {\r\n buffer[i] = _SYMBOLS[value \u00260xf];\r\n value \u003e\u003e= 4;\r\n }\r\n require(value == 0, \"Strings: hex length insufficient\");\r\n returnstring(buffer);\r\n }\r\n\r\n /**\r\n * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string`hexadecimal representation.\r\n */\r\n function toHexString(address addr) internal pure returns (string memory) {\r\n returntoHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);\r\n }\r\n}"},"TheToadz.sol":{"content":"// SPDX-License-Identifier: MIT\r\npragma solidity^0.8.9;\r\n\r\nimport \"./ERC721A.sol\";\r\nimport \"./Ownable.sol\";\r\nimport \"./Strings.sol\";\r\n\r\ncontract TheToadz is ERC721A, Ownable{\r\n using Strings for uint256;\r\n\r\n uint256 public maxSupply = 5555;\r\n uint256 public cost = 0.006 ether;\r\n uint256 publicmaxPerTx = 6;\r\n uint256 public maxFree = 1;\r\n bool public sale;\r\n\r\n string public baseURI;\r\n mapping(address =\u003e uint256)private _mintedFreeAmount;\r\n\r\n error SaleNotActive();\r\n error MaxSupplyReached();\r\n error MaxPerTxReached();\r\n errorNotEnoughETH();\r\n\r\n constructor(string memory initbaseURI) ERC721A(\"The Toadz\", \"TT\") {\r\n baseURI = initbaseURI;\r\n}\r\n\r\n function mint(uint256 _amount) external payable {\r\n if (!sale) revert SaleNotActive();\r\n\r\n uint256 _cost = (msg.value == 0 \u0026\u0026\r\n (_mintedFreeAmount[msg.sender] + _amount \u003c= maxFree))\r\n ? 0\r\n : cost;\r\n\r\n if (_amount \u003e maxPerTx) revert MaxPerTxReached();\r\n if (msg.value \u003c _cost * _amount) revert NotEnoughETH();\r\nif (_totalMinted() + _amount \u003e maxSupply) revert MaxSupplyReached();\r\n\r\n if (_cost == 0) {\r\n_mintedFreeAmount[msg.sender] += _amount;\r\n }\r\n\r\n _mint(msg.sender, _amount);\r\n }\r\n\r\n function tokenURI(uint256tokenId)\r\n public\r\n view\r\n virtual\r\n override\r\n returns (string memory)\r\n {\r\n require(\r\n _exists(tokenId),\r\n \"ERC721Metadata: URI query for nonexistent token\"\r\n );\r\n return string(abi.encodePacked(baseURI, tokenId.toString(), \".json\"));\r\n }\r\n\r\n function _baseURI() internal view virtual override returns (stringmemory) {\r\n return baseURI;\r\n }\r\n\r\n function _startTokenId() internal view virtual override returns (uint256) {\r\nreturn 1;\r\n }\r\n\r\n function setBaseURI(string memory uri) public onlyOwner {\r\n baseURI = uri;\r\n }\r\n\r\n functionstartSale() external onlyOwner {\r\n sale = !sale;\r\n }\r\n\r\n function setCost(uint256 _cost) external onlyOwner {\r\n cost= _cost;\r\n }\r\n\r\n function setMaxFreeMint(uint256 _maxFree) external onlyOwner {\r\n maxFree = _maxFree;\r\n }\r\n\r\nfunction airdrop(address receiver, uint256 _amount) external onlyOwner {\r\n _safeMint(receiver, _amount);\r\n }\r\n\r\n functionwithdraw() external onlyOwner {\r\n (bool success, ) = msg.sender.call{value: address(this).balance}(\"\");\r\n require(success,\"Transfer failed\");\r\n }\r\n}"}}