// This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023. | |
/** | |
*Submitted for verification at Etherscan.io on 2022-07-02 | |
*/ | |
// SPDX-License-Identifier: MIT | |
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) | |
pragma solidity ^0.8.0; | |
/** | |
* @dev Interface of the ERC165 standard, as defined in the | |
* https://eips.ethereum.org/EIPS/eip-165[EIP]. | |
* | |
* Implementers can declare support of contract interfaces, which can then be | |
* queried by others ({ERC165Checker}). | |
* | |
* For an implementation, see {ERC165}. | |
*/ | |
interface IERC165 { | |
/** | |
* @dev Returns true if this contract implements the interface defined by | |
* `interfaceId`. See the corresponding | |
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] | |
* to learn more about how these ids are created. | |
* | |
* This function call must use less than 30 000 gas. | |
*/ | |
function supportsInterface(bytes4 interfaceId) external view returns (bool); | |
} | |
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol) | |
pragma solidity ^0.8.0; | |
/** | |
* @dev Required interface of an ERC721 compliant contract. | |
*/ | |
interface IERC721 is IERC165 { | |
/** | |
* @dev Emitted when `tokenId` token is transferred from `from` to `to`. | |
*/ | |
event Transfer( | |
address indexed from, | |
address indexed to, | |
uint256 indexed tokenId | |
); | |
/** | |
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. | |
*/ | |
event Approval( | |
address indexed owner, | |
address indexed approved, | |
uint256 indexed tokenId | |
); | |
/** | |
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. | |
*/ | |
event ApprovalForAll( | |
address indexed owner, | |
address indexed operator, | |
bool approved | |
); | |
/** | |
* @dev Returns the number of tokens in ``owner``'s account. | |
*/ | |
function balanceOf(address owner) external view returns (uint256 balance); | |
/** | |
* @dev Returns the owner of the `tokenId` token. | |
* | |
* Requirements: | |
* | |
* - `tokenId` must exist. | |
*/ | |
function ownerOf(uint256 tokenId) external view returns (address owner); | |
/** | |
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients | |
* are aware of the ERC721 protocol to prevent tokens from being forever locked. | |
* | |
* Requirements: | |
* | |
* - `from` cannot be the zero address. | |
* - `to` cannot be the zero address. | |
* - `tokenId` token must exist and be owned by `from`. | |
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. | |
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. | |
* | |
* Emits a {Transfer} event. | |
*/ | |
function safeTransferFrom( | |
address from, | |
address to, | |
uint256 tokenId | |
) external; | |
/** | |
* @dev Transfers `tokenId` token from `from` to `to`. | |
* | |
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. | |
* | |
* Requirements: | |
* | |
* - `from` cannot be the zero address. | |
* - `to` cannot be the zero address. | |
* - `tokenId` token must be owned by `from`. | |
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. | |
* | |
* Emits a {Transfer} event. | |
*/ | |
function transferFrom( | |
address from, | |
address to, | |
uint256 tokenId | |
) external; | |
/** | |
* @dev Gives permission to `to` to transfer `tokenId` token to another account. | |
* The approval is cleared when the token is transferred. | |
* | |
* Only a single account can be approved at a time, so approving the zero address clears previous approvals. | |
* | |
* Requirements: | |
* | |
* - The caller must own the token or be an approved operator. | |
* - `tokenId` must exist. | |
* | |
* Emits an {Approval} event. | |
*/ | |
function approve(address to, uint256 tokenId) external; | |
/** | |
* @dev Returns the account approved for `tokenId` token. | |
* | |
* Requirements: | |
* | |
* - `tokenId` must exist. | |
*/ | |
function getApproved(uint256 tokenId) | |
external | |
view | |
returns (address operator); | |
/** | |
* @dev Approve or remove `operator` as an operator for the caller. | |
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. | |
* | |
* Requirements: | |
* | |
* - The `operator` cannot be the caller. | |
* | |
* Emits an {ApprovalForAll} event. | |
*/ | |
function setApprovalForAll(address operator, bool _approved) external; | |
/** | |
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. | |
* | |
* See {setApprovalForAll} | |
*/ | |
function isApprovedForAll(address owner, address operator) | |
external | |
view | |
returns (bool); | |
/** | |
* @dev Safely transfers `tokenId` token from `from` to `to`. | |
* | |
* Requirements: | |
* | |
* - `from` cannot be the zero address. | |
* - `to` cannot be the zero address. | |
* - `tokenId` token must exist and be owned by `from`. | |
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. | |
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. | |
* | |
* Emits a {Transfer} event. | |
*/ | |
function safeTransferFrom( | |
address from, | |
address to, | |
uint256 tokenId, | |
bytes calldata data | |
) external; | |
} | |
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol) | |
pragma solidity ^0.8.0; | |
/** | |
* @title ERC721 token receiver interface | |
* @dev Interface for any contract that wants to support safeTransfers | |
* from ERC721 asset contracts. | |
*/ | |
interface IERC721Receiver { | |
/** | |
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} | |
* by `operator` from `from`, this function is called. | |
* | |
* It must return its Solidity selector to confirm the token transfer. | |
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. | |
* | |
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. | |
*/ | |
function onERC721Received( | |
address operator, | |
address from, | |
uint256 tokenId, | |
bytes calldata data | |
) external returns (bytes4); | |
} | |
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) | |
pragma solidity ^0.8.0; | |
/** | |
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension | |
* @dev See https://eips.ethereum.org/EIPS/eip-721 | |
*/ | |
interface IERC721Metadata is IERC721 { | |
/** | |
* @dev Returns the token collection name. | |
*/ | |
function name() external view returns (string memory); | |
/** | |
* @dev Returns the token collection symbol. | |
*/ | |
function symbol() external view returns (string memory); | |
/** | |
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. | |
*/ | |
function tokenURI(uint256 tokenId) external view returns (string memory); | |
} | |
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) | |
pragma solidity ^0.8.0; | |
/** | |
* @dev Implementation of the {IERC165} interface. | |
* | |
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check | |
* for the additional interface id that will be supported. For example: | |
* | |
* ```solidity | |
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { | |
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); | |
* } | |
* ``` | |
* | |
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. | |
*/ | |
abstract contract ERC165 is IERC165 { | |
/** | |
* @dev See {IERC165-supportsInterface}. | |
*/ | |
function supportsInterface(bytes4 interfaceId) | |
public | |
view | |
virtual | |
override | |
returns (bool) | |
{ | |
return interfaceId == type(IERC165).interfaceId; | |
} | |
} | |
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol) | |
pragma solidity ^0.8.0; | |
/** | |
* @dev Collection of functions related to the address type | |
*/ | |
library Address { | |
/** | |
* @dev Returns true if `account` is a contract. | |
* | |
* [IMPORTANT] | |
* ==== | |
* It is unsafe to assume that an address for which this function returns | |
* false is an externally-owned account (EOA) and not a contract. | |
* | |
* Among others, `isContract` will return false for the following | |
* types of addresses: | |
* | |
* - an externally-owned account | |
* - a contract in construction | |
* - an address where a contract will be created | |
* - an address where a contract lived, but was destroyed | |
* ==== | |
*/ | |
function isContract(address account) internal view returns (bool) { | |
// This method relies on extcodesize, which returns 0 for contracts in | |
// construction, since the code is only stored at the end of the | |
// constructor execution. | |
uint256 size; | |
assembly { | |
size := extcodesize(account) | |
} | |
return size > 0; | |
} | |
/** | |
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to | |
* `recipient`, forwarding all available gas and reverting on errors. | |
* | |
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost | |
* of certain opcodes, possibly making contracts go over the 2300 gas limit | |
* imposed by `transfer`, making them unable to receive funds via | |
* `transfer`. {sendValue} removes this limitation. | |
* | |
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. | |
* | |
* IMPORTANT: because control is transferred to `recipient`, care must be | |
* taken to not create reentrancy vulnerabilities. Consider using | |
* {ReentrancyGuard} or the | |
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. | |
*/ | |
function sendValue(address payable recipient, uint256 amount) internal { | |
require( | |
address(this).balance >= amount, | |
"Address: insufficient balance" | |
); | |
(bool success, ) = recipient.call{value: amount}(""); | |
require( | |
success, | |
"Address: unable to send value, recipient may have reverted" | |
); | |
} | |
/** | |
* @dev Performs a Solidity function call using a low level `call`. A | |
* plain `call` is an unsafe replacement for a function call: use this | |
* function instead. | |
* | |
* If `target` reverts with a revert reason, it is bubbled up by this | |
* function (like regular Solidity function calls). | |
* | |
* Returns the raw returned data. To convert to the expected return value, | |
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. | |
* | |
* Requirements: | |
* | |
* - `target` must be a contract. | |
* - calling `target` with `data` must not revert. | |
* | |
* _Available since v3.1._ | |
*/ | |
function functionCall(address target, bytes memory data) | |
internal | |
returns (bytes memory) | |
{ | |
return functionCall(target, data, "Address: low-level call failed"); | |
} | |
/** | |
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with | |
* `errorMessage` as a fallback revert reason when `target` reverts. | |
* | |
* _Available since v3.1._ | |
*/ | |
function functionCall( | |
address target, | |
bytes memory data, | |
string memory errorMessage | |
) internal returns (bytes memory) { | |
return functionCallWithValue(target, data, 0, errorMessage); | |
} | |
/** | |
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], | |
* but also transferring `value` wei to `target`. | |
* | |
* Requirements: | |
* | |
* - the calling contract must have an ETH balance of at least `value`. | |
* - the called Solidity function must be `payable`. | |
* | |
* _Available since v3.1._ | |
*/ | |
function functionCallWithValue( | |
address target, | |
bytes memory data, | |
uint256 value | |
) internal returns (bytes memory) { | |
return | |
functionCallWithValue( | |
target, | |
data, | |
value, | |
"Address: low-level call with value failed" | |
); | |
} | |
/** | |
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but | |
* with `errorMessage` as a fallback revert reason when `target` reverts. | |
* | |
* _Available since v3.1._ | |
*/ | |
function functionCallWithValue( | |
address target, | |
bytes memory data, | |
uint256 value, | |
string memory errorMessage | |
) internal returns (bytes memory) { | |
require( | |
address(this).balance >= value, | |
"Address: insufficient balance for call" | |
); | |
require(isContract(target), "Address: call to non-contract"); | |
(bool success, bytes memory returndata) = target.call{value: value}( | |
data | |
); | |
return verifyCallResult(success, returndata, errorMessage); | |
} | |
/** | |
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], | |
* but performing a static call. | |
* | |
* _Available since v3.3._ | |
*/ | |
function functionStaticCall(address target, bytes memory data) | |
internal | |
view | |
returns (bytes memory) | |
{ | |
return | |
functionStaticCall( | |
target, | |
data, | |
"Address: low-level static call failed" | |
); | |
} | |
/** | |
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], | |
* but performing a static call. | |
* | |
* _Available since v3.3._ | |
*/ | |
function functionStaticCall( | |
address target, | |
bytes memory data, | |
string memory errorMessage | |
) internal view returns (bytes memory) { | |
require(isContract(target), "Address: static call to non-contract"); | |
(bool success, bytes memory returndata) = target.staticcall(data); | |
return verifyCallResult(success, returndata, errorMessage); | |
} | |
/** | |
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], | |
* but performing a delegate call. | |
* | |
* _Available since v3.4._ | |
*/ | |
function functionDelegateCall(address target, bytes memory data) | |
internal | |
returns (bytes memory) | |
{ | |
return | |
functionDelegateCall( | |
target, | |
data, | |
"Address: low-level delegate call failed" | |
); | |
} | |
/** | |
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], | |
* but performing a delegate call. | |
* | |
* _Available since v3.4._ | |
*/ | |
function functionDelegateCall( | |
address target, | |
bytes memory data, | |
string memory errorMessage | |
) internal returns (bytes memory) { | |
require(isContract(target), "Address: delegate call to non-contract"); | |
(bool success, bytes memory returndata) = target.delegatecall(data); | |
return verifyCallResult(success, returndata, errorMessage); | |
} | |
/** | |
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the | |
* revert reason using the provided one. | |
* | |
* _Available since v4.3._ | |
*/ | |
function verifyCallResult( | |
bool success, | |
bytes memory returndata, | |
string memory errorMessage | |
) internal pure returns (bytes memory) { | |
if (success) { | |
return returndata; | |
} else { | |
// Look for revert reason and bubble it up if present | |
if (returndata.length > 0) { | |
// The easiest way to bubble the revert reason is using memory via assembly | |
assembly { | |
let returndata_size := mload(returndata) | |
revert(add(32, returndata), returndata_size) | |
} | |
} else { | |
revert(errorMessage); | |
} | |
} | |
} | |
} | |
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol) | |
pragma solidity ^0.8.0; | |
/** | |
* @dev Provides information about the current execution context, including the | |
* sender of the transaction and its data. While these are generally available | |
* via msg.sender and msg.data, they should not be accessed in such a direct | |
* manner, since when dealing with meta-transactions the account sending and | |
* paying for execution may not be the actual sender (as far as an application | |
* is concerned). | |
* | |
* This contract is only required for intermediate, library-like contracts. | |
*/ | |
abstract contract Context { | |
function _msgSender() internal view virtual returns (address) { | |
return msg.sender; | |
} | |
function _msgData() internal view virtual returns (bytes calldata) { | |
return msg.data; | |
} | |
} | |
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) | |
pragma solidity ^0.8.0; | |
/** | |
* @dev String operations. | |
*/ | |
library Strings { | |
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; | |
/** | |
* @dev Converts a `uint256` to its ASCII `string` decimal representation. | |
*/ | |
function toString(uint256 value) internal pure returns (string memory) { | |
// Inspired by OraclizeAPI's implementation - MIT licence | |
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol | |
if (value == 0) { | |
return "0"; | |
} | |
uint256 temp = value; | |
uint256 digits; | |
while (temp != 0) { | |
digits++; | |
temp /= 10; | |
} | |
bytes memory buffer = new bytes(digits); | |
while (value != 0) { | |
digits -= 1; | |
buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); | |
value /= 10; | |
} | |
return string(buffer); | |
} | |
/** | |
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. | |
*/ | |
function toHexString(uint256 value) internal pure returns (string memory) { | |
if (value == 0) { | |
return "0x00"; | |
} | |
uint256 temp = value; | |
uint256 length = 0; | |
while (temp != 0) { | |
length++; | |
temp >>= 8; | |
} | |
return toHexString(value, length); | |
} | |
/** | |
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. | |
*/ | |
function toHexString(uint256 value, uint256 length) | |
internal | |
pure | |
returns (string memory) | |
{ | |
bytes memory buffer = new bytes(2 * length + 2); | |
buffer[0] = "0"; | |
buffer[1] = "x"; | |
for (uint256 i = 2 * length + 1; i > 1; --i) { | |
buffer[i] = _HEX_SYMBOLS[value & 0xf]; | |
value >>= 4; | |
} | |
require(value == 0, "Strings: hex length insufficient"); | |
return string(buffer); | |
} | |
} | |
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Enumerable.sol) | |
pragma solidity ^0.8.0; | |
/** | |
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension | |
* @dev See https://eips.ethereum.org/EIPS/eip-721 | |
*/ | |
interface IERC721Enumerable is IERC721 { | |
/** | |
* @dev Returns the total amount of tokens stored by the contract. | |
*/ | |
function totalSupply() external view returns (uint256); | |
/** | |
* @dev Returns a token ID owned by `owner` at a given `index` of its token list. | |
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens. | |
*/ | |
function tokenOfOwnerByIndex(address owner, uint256 index) | |
external | |
view | |
returns (uint256 tokenId); | |
/** | |
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract. | |
* Use along with {totalSupply} to enumerate all tokens. | |
*/ | |
function tokenByIndex(uint256 index) external view returns (uint256); | |
} | |
pragma solidity ^0.8.0; | |
/** | |
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including | |
* the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints. | |
* | |
* Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..). | |
* | |
* Assumes the number of issuable tokens (collection size) is capped and fits in a uint128. | |
* | |
* Does not support burning tokens to address(0). | |
*/ | |
contract ERC721A is | |
Context, | |
ERC165, | |
IERC721, | |
IERC721Metadata, | |
IERC721Enumerable | |
{ | |
using Address for address; | |
using Strings for uint256; | |
struct TokenOwnership { | |
address addr; | |
uint64 startTimestamp; | |
} | |
struct AddressData { | |
uint128 balance; | |
uint128 numberMinted; | |
} | |
uint256 private currentIndex = 0; | |
uint256 internal immutable collectionSize; | |
uint256 internal immutable maxBatchSize; | |
// Token name | |
string private _name; | |
// Token symbol | |
string private _symbol; | |
// Mapping from token ID to ownership details | |
// An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details. | |
mapping(uint256 => TokenOwnership) private _ownerships; | |
// Mapping owner address to address data | |
mapping(address => AddressData) private _addressData; | |
// Mapping from token ID to approved address | |
mapping(uint256 => address) private _tokenApprovals; | |
// Mapping from owner to operator approvals | |
mapping(address => mapping(address => bool)) private _operatorApprovals; | |
/** | |
* @dev | |
* `maxBatchSize` refers to how much a minter can mint at a time. | |
* `collectionSize_` refers to how many tokens are in the collection. | |
*/ | |
constructor( | |
string memory name_, | |
string memory symbol_, | |
uint256 maxBatchSize_, | |
uint256 collectionSize_ | |
) { | |
require( | |
collectionSize_ > 0, | |
"ERC721A: collection must have a nonzero supply" | |
); | |
require(maxBatchSize_ > 0, "ERC721A: max batch size must be nonzero"); | |
_name = name_; | |
_symbol = symbol_; | |
maxBatchSize = maxBatchSize_; | |
collectionSize = collectionSize_; | |
} | |
/** | |
* @dev See {IERC721Enumerable-totalSupply}. | |
*/ | |
function totalSupply() public view override returns (uint256) { | |
return currentIndex; | |
} | |
/** | |
* @dev See {IERC721Enumerable-tokenByIndex}. | |
*/ | |
function tokenByIndex(uint256 index) public view override returns (uint256) { | |
require(index < totalSupply(), "ERC721A: global index out of bounds"); | |
return index; | |
} | |
/** | |
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. | |
* This read function is O(collectionSize). If calling from a separate contract, be sure to test gas first. | |
* It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case. | |
*/ | |
function tokenOfOwnerByIndex(address owner, uint256 index) | |
public | |
view | |
override | |
returns (uint256) | |
{ | |
require(index < balanceOf(owner), "ERC721A: owner index out of bounds"); | |
uint256 numMintedSoFar = totalSupply(); | |
uint256 tokenIdsIdx = 0; | |
address currOwnershipAddr = address(0); | |
for (uint256 i = 0; i < numMintedSoFar; i++) { | |
TokenOwnership memory ownership = _ownerships[i]; | |
if (ownership.addr != address(0)) { | |
currOwnershipAddr = ownership.addr; | |
} | |
if (currOwnershipAddr == owner) { | |
if (tokenIdsIdx == index) { | |
return i; | |
} | |
tokenIdsIdx++; | |
} | |
} | |
revert("ERC721A: unable to get token of owner by index"); | |
} | |
/** | |
* @dev See {IERC165-supportsInterface}. | |
*/ | |
function supportsInterface(bytes4 interfaceId) | |
public | |
view | |
virtual | |
override(ERC165, IERC165) | |
returns (bool) | |
{ | |
return | |
interfaceId == type(IERC721).interfaceId || | |
interfaceId == type(IERC721Metadata).interfaceId || | |
interfaceId == type(IERC721Enumerable).interfaceId || | |
super.supportsInterface(interfaceId); | |
} | |
/** | |
* @dev See {IERC721-balanceOf}. | |
*/ | |
function balanceOf(address owner) public view override returns (uint256) { | |
require(owner != address(0), "ERC721A: balance query for the zero address"); | |
return uint256(_addressData[owner].balance); | |
} | |
function _numberminted(address owner) internal view returns (uint256) { | |
require( | |
owner != address(0), | |
"ERC721A: number minted query for the zero address" | |
); | |
return uint256(_addressData[owner].numberMinted); | |
} | |
function ownershipOf(uint256 tokenId) | |
internal | |
view | |
returns (TokenOwnership memory) | |
{ | |
require(_exists(tokenId), "ERC721A: owner query for nonexistent token"); | |
uint256 lowestTokenToCheck; | |
if (tokenId >= maxBatchSize) { | |
lowestTokenToCheck = tokenId - maxBatchSize + 1; | |
} | |
for (uint256 curr = tokenId; curr >= lowestTokenToCheck; curr--) { | |
TokenOwnership memory ownership = _ownerships[curr]; | |
if (ownership.addr != address(0)) { | |
return ownership; | |
} | |
} | |
revert("ERC721A: unable to determine the owner of token"); | |
} | |
/** | |
* @dev See {IERC721-ownerOf}. | |
*/ | |
function ownerOf(uint256 tokenId) public view override returns (address) { | |
return ownershipOf(tokenId).addr; | |
} | |
/** | |
* @dev See {IERC721Metadata-name}. | |
*/ | |
function name() public view virtual override returns (string memory) { | |
return _name; | |
} | |
/** | |
* @dev See {IERC721Metadata-symbol}. | |
*/ | |
function symbol() public view virtual override returns (string memory) { | |
return _symbol; | |
} | |
/** | |
* @dev See {IERC721Metadata-tokenURI}. | |
*/ | |
function tokenURI(uint256 tokenId) | |
public | |
view | |
virtual | |
override | |
returns (string memory) | |
{ | |
require( | |
_exists(tokenId), | |
"ERC721Metadata: URI query for nonexistent token" | |
); | |
string memory baseURI = _baseURI(); | |
return | |
bytes(baseURI).length > 0 | |
? string(abi.encodePacked(baseURI, tokenId.toString(), ".json")) | |
: ""; | |
} | |
/** | |
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each | |
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty | |
* by default, can be overriden in child contracts. | |
*/ | |
function _baseURI() internal view virtual returns (string memory) { | |
return ""; | |
} | |
/** | |
* @dev See {IERC721-approve}. | |
*/ | |
function approve(address to, uint256 tokenId) public override { | |
address owner = ERC721A.ownerOf(tokenId); | |
require(to != owner, "ERC721A: approval to current owner"); | |
require( | |
_msgSender() == owner || isApprovedForAll(owner, _msgSender()), | |
"ERC721A: approve caller is not owner nor approved for all" | |
); | |
_approve(to, tokenId, owner); | |
} | |
/** | |
* @dev See {IERC721-getApproved}. | |
*/ | |
function getApproved(uint256 tokenId) public view override returns (address) { | |
require(_exists(tokenId), "ERC721A: approved query for nonexistent token"); | |
return _tokenApprovals[tokenId]; | |
} | |
/** | |
* @dev See {IERC721-setApprovalForAll}. | |
*/ | |
function setApprovalForAll(address operator, bool approved) public override { | |
require(operator != _msgSender(), "ERC721A: approve to caller"); | |
_operatorApprovals[_msgSender()][operator] = approved; | |
emit ApprovalForAll(_msgSender(), operator, approved); | |
} | |
/** | |
* @dev See {IERC721-isApprovedForAll}. | |
*/ | |
function isApprovedForAll(address owner, address operator) | |
public | |
view | |
virtual | |
override | |
returns (bool) | |
{ | |
return _operatorApprovals[owner][operator]; | |
} | |
/** | |
* @dev See {IERC721-transferFrom}. | |
*/ | |
function transferFrom( | |
address from, | |
address to, | |
uint256 tokenId | |
) public override { | |
_transfer(from, to, tokenId); | |
} | |
/** | |
* @dev See {IERC721-safeTransferFrom}. | |
*/ | |
function safeTransferFrom( | |
address from, | |
address to, | |
uint256 tokenId | |
) public override { | |
safeTransferFrom(from, to, tokenId, ""); | |
} | |
/** | |
* @dev See {IERC721-safeTransferFrom}. | |
*/ | |
function safeTransferFrom( | |
address from, | |
address to, | |
uint256 tokenId, | |
bytes memory _data | |
) public override { | |
_transfer(from, to, tokenId); | |
require( | |
_checkOnERC721Received(from, to, tokenId, _data), | |
"ERC721A: transfer to non ERC721Receiver implementer" | |
); | |
} | |
/** | |
* @dev Returns whether `tokenId` exists. | |
* | |
* Tokens can be managed by th eir owner or approved accounts via {approve} or {setApprovalForAll}. | |
* | |
* Tokens start existing when they are minted (`_mint`), | |
*/ | |
function _exists(uint256 tokenId) internal view returns (bool) { | |
return tokenId < currentIndex; | |
} | |
function _safeMint(address to, uint256 quantity) internal { | |
_safeMint(to, quantity, ""); | |
} | |
/** | |
* @dev Mints `quantity` tokens and transfers them to `to`. | |
* | |
* Requirements: | |
* | |
* - there must be `quantity` tokens remaining unminted in the total collection. | |
* - `to` cannot be the zero address. | |
* - `quantity` cannot be larger than the max batch size. | |
* | |
* Emits a {Transfer} event. | |
*/ | |
function _safeMint( | |
address to, | |
uint256 quantity, | |
bytes memory _data | |
) internal { | |
uint256 startTokenId = currentIndex; | |
require(to != address(0), "ERC721A: mint to the zero address"); | |
// We know if the first token in the batch doesn't exist, the other ones don't as well, because of serial ordering. | |
require(!_exists(startTokenId), "ERC721A: token already minted"); | |
require(quantity <= maxBatchSize, "ERC721A: quantity to mint too high"); | |
_beforeTokenTransfers(address(0), to, startTokenId, quantity); | |
AddressData memory addressData = _addressData[to]; | |
_addressData[to] = AddressData( | |
addressData.balance + uint128(quantity), | |
addressData.numberMinted + uint128(quantity) | |
); | |
_ownerships[startTokenId] = TokenOwnership(to, uint64(block.timestamp)); | |
uint256 updatedIndex = startTokenId; | |
for (uint256 i = 0; i < quantity; i++) { | |
emit Transfer(address(0), to, updatedIndex); | |
require( | |
_checkOnERC721Received(address(0), to, updatedIndex, _data), | |
"ERC721A: transfer to non ERC721Receiver implementer" | |
); | |
updatedIndex++; | |
} | |
currentIndex = updatedIndex; | |
_afterTokenTransfers(address(0), to, startTokenId, quantity); | |
} | |
/** | |
* @dev Transfers `tokenId` from `from` to `to`. | |
* | |
* Requirements: | |
* | |
* - `to` cannot be the zero address. | |
* - `tokenId` token must be owned by `from`. | |
* | |
* Emits a {Transfer} event. | |
*/ | |
function _transfer( | |
address from, | |
address to, | |
uint256 tokenId | |
) private { | |
TokenOwnership memory prevOwnership = ownershipOf(tokenId); | |
bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr || | |
getApproved(tokenId) == _msgSender() || | |
isApprovedForAll(prevOwnership.addr, _msgSender())); | |
require( | |
isApprovedOrOwner, | |
"ERC721A: transfer caller is not owner nor approved" | |
); | |
require( | |
prevOwnership.addr == from, | |
"ERC721A: transfer from incorrect owner" | |
); | |
require(to != address(0), "ERC721A: transfer to the zero address"); | |
_beforeTokenTransfers(from, to, tokenId, 1); | |
// Clear approvals from the previous owner | |
_approve(address(0), tokenId, prevOwnership.addr); | |
_addressData[from].balance -= 1; | |
_addressData[to].balance += 1; | |
_ownerships[tokenId] = TokenOwnership(to, uint64(block.timestamp)); | |
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it. | |
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. | |
uint256 nextTokenId = tokenId + 1; | |
if (_ownerships[nextTokenId].addr == address(0)) { | |
if (_exists(nextTokenId)) { | |
_ownerships[nextTokenId] = TokenOwnership( | |
prevOwnership.addr, | |
prevOwnership.startTimestamp | |
); | |
} | |
} | |
emit Transfer(from, to, tokenId); | |
_afterTokenTransfers(from, to, tokenId, 1); | |
} | |
/** | |
* @dev Approve `to` to operate on `tokenId` | |
* | |
* Emits a {Approval} event. | |
*/ | |
function _approve( | |
address to, | |
uint256 tokenId, | |
address owner | |
) private { | |
_tokenApprovals[tokenId] = to; | |
emit Approval(owner, to, tokenId); | |
} | |
uint256 public nextOwnerToExplicitlySet = 0; | |
/** | |
* @dev Explicitly set `owners` to eliminate loops in future calls of ownerOf(). | |
*/ | |
function _setOwnersExplicit(uint256 quantity) internal { | |
uint256 oldNextOwnerToSet = nextOwnerToExplicitlySet; | |
require(quantity > 0, "quantity must be nonzero"); | |
uint256 endIndex = oldNextOwnerToSet + quantity - 1; | |
if (endIndex > collectionSize - 1) { | |
endIndex = collectionSize - 1; | |
} | |
// We know if the last one in the group exists, all in the group exist, due to serial ordering. | |
require(_exists(endIndex), "not enough minted yet for this cleanup"); | |
for (uint256 i = oldNextOwnerToSet; i <= endIndex; i++) { | |
if (_ownerships[i].addr == address(0)) { | |
TokenOwnership memory ownership = ownershipOf(i); | |
_ownerships[i] = TokenOwnership( | |
ownership.addr, | |
ownership.startTimestamp | |
); | |
} | |
} | |
nextOwnerToExplicitlySet = endIndex + 1; | |
} | |
/** | |
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. | |
* The call is not executed if the target address is not a contract. | |
* | |
* @param from address representing the previous owner of the given token ID | |
* @param to target address that will receive the tokens | |
* @param tokenId uint256 ID of the token to be transferred | |
* @param _data bytes optional data to send along with the call | |
* @return bool whether the call correctly returned the expected magic value | |
*/ | |
function _checkOnERC721Received( | |
address from, | |
address to, | |
uint256 tokenId, | |
bytes memory _data | |
) private returns (bool) { | |
if (to.isContract()) { | |
try | |
IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) | |
returns (bytes4 retval) { | |
return retval == IERC721Receiver(to).onERC721Received.selector; | |
} catch (bytes memory reason) { | |
if (reason.length == 0) { | |
revert("ERC721A: transfer to non ERC721Receiver implementer"); | |
} else { | |
assembly { | |
revert(add(32, reason), mload(reason)) | |
} | |
} | |
} | |
} else { | |
return true; | |
} | |
} | |
/** | |
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting. | |
* | |
* startTokenId - the first token id to be transferred | |
* quantity - the amount to be transferred | |
* | |
* Calling conditions: | |
* | |
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be | |
* transferred to `to`. | |
* - When `from` is zero, `tokenId` will be minted for `to`. | |
*/ | |
function _beforeTokenTransfers( | |
address from, | |
address to, | |
uint256 startTokenId, | |
uint256 quantity | |
) internal virtual {} | |
/** | |
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes | |
* minting. | |
* | |
* startTokenId - the first token id to be transferred | |
* quantity - the amount to be transferred | |
* | |
* Calling conditions: | |
* | |
* - when `from` and `to` are both non-zero. | |
* - `from` and `to` are never both zero. | |
*/ | |
function _afterTokenTransfers( | |
address from, | |
address to, | |
uint256 startTokenId, | |
uint256 quantity | |
) internal virtual {} | |
} | |
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) | |
pragma solidity ^0.8.0; | |
/** | |
* @dev Contract module which provides a basic access control mechanism, where | |
* there is an account (an owner) that can be granted exclusive access to | |
* specific functions. | |
* | |
* By default, the owner account will be the one that deploys the contract. This | |
* can later be changed with {transferOwnership}. | |
* | |
* This module is used through inheritance. It will make available the modifier | |
* `onlyOwner`, which can be applied to your functions to restrict their use to | |
* the owner. | |
*/ | |
abstract contract Ownable is Context { | |
address private _owner; | |
event OwnershipTransferred( | |
address indexed previousOwner, | |
address indexed newOwner | |
); | |
/** | |
* @dev Initializes the contract setting the deployer as the initial owner. | |
*/ | |
constructor() { | |
_transferOwnership(_msgSender()); | |
} | |
/** | |
* @dev Returns the address of the current owner. | |
*/ | |
function owner() public view virtual returns (address) { | |
return _owner; | |
} | |
/** | |
* @dev Throws if called by any account other than the owner. | |
*/ | |
modifier onlyOwner() { | |
require(owner() == _msgSender(), "You are not the owner"); | |
_; | |
} | |
/** | |
* @dev Leaves the contract without owner. It will not be possible to call | |
* `onlyOwner` functions anymore. Can only be called by the current owner. | |
* | |
* NOTE: Renouncing ownership will leave the contract without an owner, | |
* thereby removing any functionality that is only available to the owner. | |
*/ | |
function renounceOwnership() public virtual onlyOwner { | |
_transferOwnership(address(0)); | |
} | |
/** | |
* @dev Transfers ownership of the contract to a new account (`newOwner`). | |
* Can only be called by the current owner. | |
*/ | |
function transferOwnership(address newOwner) public virtual onlyOwner { | |
require( | |
newOwner != address(0), | |
"Ownable: new owner is the zero address" | |
); | |
_transferOwnership(newOwner); | |
} | |
/** | |
* @dev Transfers ownership of the contract to a new account (`newOwner`). | |
* Internal function without access restriction. | |
*/ | |
function _transferOwnership(address newOwner) internal virtual { | |
address oldOwner = _owner; | |
_owner = newOwner; | |
emit OwnershipTransferred(oldOwner, newOwner); | |
} | |
} | |
pragma solidity ^0.8.0; | |
contract Web3TigersNFT is ERC721A, Ownable { | |
uint256 public NFT_PRICE = 0.0029 ether; | |
uint256 public MAX_SUPPLY = 1444; | |
uint256 public MAX_MINTS = 100; | |
string public baseURI = "https://filedn.eu/l9DcJX8i7vtpxhvDFTHqIOm/json/"; | |
string public baseExtension = ".json"; | |
bool public paused = false; | |
constructor() ERC721A("Web 3 Tigers ", "Wb3N", MAX_MINTS, MAX_SUPPLY) { | |
} | |
function mint(uint256 numTokens) public payable { | |
require(!paused, "Paused"); | |
require(numTokens > 0 && numTokens <= MAX_MINTS); | |
require(totalSupply() + numTokens <= MAX_SUPPLY); | |
require(MAX_MINTS >= numTokens, "Excess max per paid tx"); | |
require(msg.value >= numTokens * NFT_PRICE, "Invalid funds provided"); | |
_safeMint(msg.sender, numTokens); | |
} | |
function devsMint(uint256 numTokens) public payable onlyOwner { | |
_safeMint(msg.sender, numTokens); | |
} | |
function pause(bool _state) public onlyOwner { | |
paused = _state; | |
} | |
function setBaseURI(string memory newBaseURI) public onlyOwner { | |
baseURI = newBaseURI; | |
} | |
function tokenURI(uint256 _tokenId) | |
public | |
view | |
override | |
returns (string memory) | |
{ | |
require(_exists(_tokenId), "That token doesn't exist"); | |
return | |
bytes(baseURI).length > 0 | |
? string( | |
abi.encodePacked( | |
baseURI, | |
Strings.toString(_tokenId), | |
baseExtension | |
) | |
) | |
: ""; | |
} | |
function setPrice(uint256 newPrice) public onlyOwner { | |
NFT_PRICE = newPrice; | |
} | |
function setMaxMints(uint256 newMax) public onlyOwner { | |
MAX_MINTS = newMax; | |
} | |
function _baseURI() internal view virtual override returns (string memory) { | |
return baseURI; | |
} | |
function withdrawMoney() external onlyOwner { | |
(bool success, ) = msg.sender.call{value: address(this).balance}(""); | |
require(success, "WITHDRAW FAILED!"); | |
} | |
function contractURI() public view returns (string memory) { | |
return | |
bytes(baseURI).length > 0 | |
? string( | |
abi.encodePacked( | |
baseURI, | |
"metadata", | |
baseExtension | |
) | |
) | |
: ""; | |
} | |
} |