ERC-721
Overview
Max Total Supply
5,000 BIRB
Holders
697
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
2 BIRBLoading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
TheEarlyBirbs
Compiler Version
v0.8.13+commit.abaa5c0e
Optimization Enabled:
No with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
//SPDX-License-Identifier: MIT pragma solidity 0.8.13; // """"""""""""""""""""""""""""""""""""""""""""""""""""" Noun Cats – The Early Birbs """""""""""""""""""""""""""""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""""""""""""""":-------------------------------_______-i""""""""""""""""""""""""""""""""" // """"""""""""""""""""""""""""""""""""""""""""""""""""""lmwqqqpppqqqqqqqqqqqqqqqqqqqqqqqqdhkkbddt""""""""""""""""""""""""""""""""" // """"""""""""""""""""""""""""""""""""""""""""""""""""""lwppppppqqqqqqqppppqqqqpppppppppqpoakbddf""""""""""""""""""""""""""""""""" // """"""""""""""""""""""""""""""""""""""""""""""""""""""!qppdddddddddddddddppppddddddddddd*ohkkbf""""""""""""""""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""{mmmmmmmmmmmmwqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwqqqdbddqwwmmmmwwC,""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""}wwwwwwwwwqqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwkakbbbpppqpppC,""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""}wwwwwwwqqpppqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwkoakbddddppppC,""""""""""""""""""" // """""""""""""""""""""""""""""""""",Illlll(wwwwwqqppppppqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwqkahkkbdddddddL!l!lll:""""""""""""" // """""""""""""""""""""""""""""""""":mwqwqqwwwqqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwpakbddp[""""""""""""" // """""""""""""""""""""""""""""""""":mwwwwqqwqqpppqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwqqqqqqqqqqboakbbd[""""""""""""" // """""""""""""""""""""""""""""""""";mqpdddpppppddqwwqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwqqqqqqqqqqqqqqqqbooakdd}""""""""""""" // """""""""""""""""""""""""""""""""";mwwwqqwwwwqqqwwwqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqwwwwqqqqqqqqqqqqpqqqqw1""""""""""""" // """""""""""""""""""""""""""""""""";wwqqqqqqqqqqqqqqqqqqpppppppppqqqqqqqqqqqqqqqqqqqqqqpppppppppppppppppppppppppppp}""""""""""""" // """""""""""""""""""""""""""""""""";qqppppppppppppppppppddddppppppppppppppppqqqpppppppppddddddddddddddddddppppdpppp}""""""""""""" // """""""""""""""""""""""""""""""""";Zwwqqqqwwwqqqqqqqqqqqqqqqqqqqwwwwqqqqqwpdpppppwwwwqqqqqqqqqqqqqqqqqqqqqqqqqqqqq{,,,,,,""""""" // """""""""""""""""""""""""""""""""":|(|(((((((((((((((((((((((((((((((((((|vbbbdpq/(((|||||||||||||||||||||||||||||(|(||(}""""""" // """""""""""""""""""""""""""""""""":(((((((((((((((((((((((((((((((((((((((chkkbbb/|(((((((((((((((((((((((((((((((((((((}""""""" // """""""""""""""""""""""""""""""""";((((((((||((((((((((((((((((((((((((((|cahbbdd||(((((((((((((((((((((((((((((((((((((}""""""" // """""""""""""""""""""""""""""""""":((((((; ^wwwwwwwwqqqpw|((((|vahbbdd||((((+ . .wdddddddddddp/((((|}""""""" // """""""""""""""""""""""""""""""""^;(((((|: ^M########M##*|(((((vahkbdd||((((_ h#MM####MMMM#/|(((|}""""""" // """""""""""""""""""""""""""""""""";((((((; ^M###########o|(((((vaahhkb|(((((_ k#MM########*/(||(|}""""""" // """""""""""""""""""""""""""""""""":((((((; ^M###########o|(((((cM##akb|(((((_ k#MM########*/(||(|}""""""" // """""""""""""",|((((((((((((((((||||(((((: ^############o|((((((((((((((((((_ k#MM#MMMM###*/(||||}""""""" // """""""""""""",|((((((((((((((((||||(((((: ^############o|((((((((((((((((((_ k#MM#MMMM###*/(||||}""""""" // """""""""""""",|(((((((((((((((((|(|(((((; ^#####MMMM###o|((((((((((((((((((_ k#MM#MMMM###*/|||||}""""""" // """""""""""""",|((((([!llllllll!l!>|(((((; ^#####MMMM###o|(((((rLLLLLL/(((((_ k#MM#MMMM###*/|||||}""""""" // """""""""""""",|(((((-"""""""""""":((((((: ^#####MMMM###o|(((((z*oaahk/(((((_ k#MM#MMMM###*/(||||}""""""" // """""""""""""",|(((((-"""""""""""":((((((; ^############o|(((((c*ahhkd/((((|_ k#MM#MMMM###*/|||||}""""""" // """""""""""""",|(((((-"""""""""""":((((((; ^############o|((((|c*ahhkd/((((|_ k#MM#MMMM###*/|||||}""""""" // """""""""""""",|(((()-"""""""""""":((((((; ^############o|(((((coahkbb/((((|_ k#MM#MMMM###*/|||||{""""""" // """""""""""""",|(((()_"""""""""""":((((((; ^MMMM########o|(((((cahhbbb/((((|_ k#MM#MMMM###*/|||||{""""""" // """""""""""""",|((())_"""""""""""":((((((; ^MMMM########o|(((((cahhbbp/((((|_ k####MMMM###*/|||||{""""""" // """""""""""""""_+++++i"""""""""""":((((((~;;;;;;;;;;;;lUUUUUUUUUUJUz|((((|vahhkbd/|((((];;I;;;;;;;;;lzYYYYYXXXYYUX/||||({""""""" // """""""""""""""""""""""""""""""""":(((((((((((((((((((((((((((((((((((((((cahhkbd/|((((((|((((((((((((|||||||||((||||||({""""""" // """""""""""""""""""""""""""""""""":((((((((((((((((((((|||||||||((((((((((cahhkkp|((((((((((((((((((((((((((((((((((||((}""""""" // """""""""""""""""""""""""""""""""":((((((((((((((((((((||||||||((((((((((|coahkbp|((((((((((((((((((((((((((((((((||||||{""""""" // """""""""""""""""""""""""""""""""";wpbbbbbbbbbbbbbbbbkkkkkkkkkkkkkkkkkkkkb);;IIII;;;;;;>hhhhkkkkkbkkkkkkkkkkkbkkkk}""""""""""""" // """""""""""""""""""""""""""""""""";qpqppppppdppppppppddddddbdddbbbddddddpp1III;;;;;;;;I<hahhbbbbddddpppppppppppppp[""""""""""""" // """""""""""""""""""""""""""""""""";qqqqqqqqqqqqqqqqpqqqppddddddddddppppqqq{III;;;;;;;;I<aahkbbdpppppqqqqqqqqqqqqqq[""""""""""""" // """"""""Iiiiii>iiiiiiiiiiii>>iiiii~wwqwwqwwqqqqqqqqppppqpppddddpppppdppppq1II;;;;;;;;;;!JCJUUYZpppqqqqqqqqqqqqqqqq}""""""""""""" // """"""",twwwwwqwwwwwwwwwwwwqqwwwwwwwwwwwwwqqqqqqqqqpppqOOOOOOOOOOOOOkkdpqq1II;;;;;;;;;;;;;;;;;cbbppqqqqqqwqqqqwwww}""""""""""""" // """"""",twwwwwqwwmwwwwwwwwwqqwwwwwwwwwwwwqqqqpqqqpppppqZOOOOOOOOOOOOhkbppq1II;;;;;;;;;;;;;;;;;cbdpppqqwwwwwwwwwwww}""""""""""""" // """"""",twwwwwwwwwwwwwwwwwwqwwwwwwwwwwwwqqqppddddddbbbdZZOOOOOOOOOOOhkdppq)III;;;;;;;;;;;;I;;;cddppqqwwwwwwwwwwwww}""""""""""""" // """"""",twwwwwqwwwwwwwwwwwwqwwwwwwwwwwwqqmZOOOZZZZOOZZZmmwwwwwwwwwwZhbbppqwwwwwwwwwwwwwwwwwwqqbdppqqwwwwwwwwwwwwww}""""""""""""" // """"""",fwwwwqqwwwwwwwwwwwwqwwwwwwwwqqqqpwOOOOOOOOOOOOZwwwwwwwwwwmwmhkdppqqqqqqqqqqqqqqqqqqqqqqqqqqqwwwwwwwwwwwwww}""""""""""""" // """"""",fwwwwqqwwwwwwwwwwwwqwwwwwwqqqppppwOOOOOOOOOOOOZmwwwwwwwwwwwmakdppqqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww}""""""""""""" // """"""",(CCCCCCwqqqqqqwwqqqqwwwwqqqwqpdddqZOZOZZZZZZZZZmwwwwwwwwwwwmhkdppqqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww}""""""""""""" // """""""""""""",qppdbbbbkkkkkqwwwwqqZZOOOOmwwwwwwwwwwwwwwwwwwwwwwwwwmhkdppqqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww}""""""""""""" // """"""""""""""^wqqqqqqqqqqppwwwwqqqZZZZZZmwwwwwwwwwwwwwwwwwwwwwwwwwmhkdpqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww}""""""""""""" // """""""""""""""wwwwwwwwqqqqqwwwwwwwZZZZOOmwwwwmmmwwwwwwwwwwwwwwwwwwmhkbpqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww}""""""""""""" // """""""""""""",llllll?wwwwqqpdbbkkkpdbbkhpZZZZZZZZZZZZmwwwwwwwwwwwwmkkbpqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww}""""""""""""" // """""""""""""""""""""~wwwwqqqqpppddqppddbwOOOOOOOOOOOOZwwwwwwwwwwwwmhkbpqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww}""""""""""""" // """""""""""""""""""""~wwwwwqqqqqpppqqqqqpmOOOOOOOOOOOOZwwwwwwwwwmwwmhkbpqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww}^"""""""""""" // """""""""""""""""""""~ZZZZZZZZZZmmmqqwqqqmOOOOOOZZOOOOZwwwwwmmmmmwwmhkbpqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwqwwq}^"""""""""""" // """""""""""""""""""""""""""""""""";wwwwwwwqdbbbbbkkkhhaZOOOOOOOOOOZOhkbpqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwdoaahhk[""""""""""""" // """""""""""""""""""""""""""""""""";wwwwwwwqqqqppppppddpOOOOOOOOOOOZOhkdpqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwdohkbpp[""""""""""""" // """""""""""""""""""""""""""""""""";mwwwwwwqqqqqqwqqqqpqOOOOOOOOOOOO0hkdpqqqwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwqhkbdpq[""""""""""""" // """""""""""""""""""""""""""""""""":++++++fdbbbkkdbdddbbdddddpdddppppkbbbbbbddddbbbdddddddddbbbbbddddbkkkkbkZ_+~~~~I""""""""""""" // """""""""""""""""""""""""""""""""""""""""{bbkkkhdddpddddbbbbbbbbbbbbbbbbdbbbdddddddddddddddddddddddddoaahhhZ,""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""}ddbbbkpqqqqqqqqqqppdpddddddddppppppppppqqqqqqqqqqqqqqppppqqhakbbb0"""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""}pqppdbpqwwwwwqwqwqpqqppppppppppqqqqqqqqqwwwwwwqqqqqqwqqqqqqhhkbdpQ"""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""^^^^^""""^^^^:kkkkkk/^^^^^^^"""^^^^^^^^^^^^^^^"qkkkkkt^^^^"""""^^"""""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""""""""""""""";bkkkkbf^"""""""""""""""""""""""^"qhkkkkt^^""""""""""""""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""""""""""""""":dbbbdd/""""""""""""""""""""""""""wbbbbbt^^""""""""""""""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""""""""""""""":xnuuun}IIII::""""""""""""""""""""jnnxxx1III;;:,"""""""""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""""""""""""""",llllll[)]-+~>""""""""""""""""""",IllIIl])[-+<<,"""""""""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""""""""""""""""llllll[([?+~<""""""""""""""""""",llllll])[-+<>,"""""""""""""""""""""""""" // """""""""""""""""""""""""""""""""""""""""""""""""""""""Illlll-{?+~<i""""""""""""""""""",llllll-}?+~<>,"""""""""""""""""""""""""" // Contract by @backseats_eth // Audited by: @SuperShyGuy0 import "erc721a/contracts/ERC721A.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/common/ERC2981.sol"; // Errors error ExceedsMaxSupply(); error ClaimClosed(); error BuyClosed(); error NoContracts(); error WrongAmount(); error WrongETHAmount(); // Noun Cats Invisibles Interface interface IInvisibles { function ownerOf(uint256 tokenId) external returns (address); } // The Early Birbs are a community-created CC0 collection by the Noun Cats commmunity. Birbs are free to mint as long as you hold an Invisible Noun Cat (which, for the time being, can still be minted at NounCats.com). Each Invisible entitles you to one Early Birb. Invisibles cannot be reused. Enjoy the Birbs and thank you to the community for creating this together! contract TheEarlyBirbs is ERC721A, ERC2981, Ownable { // 5,000 Invisibles, Cats, and Birbs uint256 public constant MAX_SUPPLY = 5_000; // The price is 0.025 ETH uint256 public price = 0.025 ether; // The Early Birbs treasury wallet address public _withdrawAddress = 0x3d7f75ff0cf322D43e39868BA3Ef4D2742Cc0384; // The IPFS URI where our data can be found string public _baseTokenURI; // A mapping of Invisible IDs to whether they've been used to mint an Early Birb or not mapping(uint256 => bool) public _didInvisibleClaimBirb; // An enum and associated variable tracking the state of the mint enum MintState { CLOSED, CLAIM, BUY } MintState public _mintState; // Modifiers modifier ensureSupply(uint256 _amount){ if (totalSupply() + _amount > MAX_SUPPLY) revert ExceedsMaxSupply(); _; } modifier noContracts() { if (msg.sender != tx.origin) revert NoContracts(); _; } modifier claimable() { if (_mintState != MintState.CLAIM) revert ClaimClosed(); _; } modifier purchaseable() { if (_mintState != MintState.BUY) revert BuyClosed(); _; } // Constructor constructor() ERC721A("The Early Birbs", "BIRB") { // Mint to Brandon Mighty, the inspiration for The Early Birbs _mint(0x66Df0A3C697F25134a73fd3030F2c3A9a6861BBC, 1); // Mint Love Birb to Elle, who made it _mint(0xaf81d5Cd82417Bd17F533CdF5443521F871729Dc, 1); // Burn two of Backseats' claims for the gifts above _didInvisibleClaimBirb[1] = true; _didInvisibleClaimBirb[33] = true; } // Claim and Mint /** @notice Hatches Early Birbs using the ID of the corresponding Invisible. Skips any IDs that have already been used */ function hatchEarlyBirbs(uint256[] calldata _tokenIDs) external claimable() noContracts() { // Noun Cats Invisibles Contract: https://contractreader.io/address/0xb5942db8d5be776ce7585132616d3707f40d46e5 IInvisibles invis = IInvisibles(0xB5942dB8d5bE776CE7585132616D3707f40D46e5); uint256 count; uint256 length = _tokenIDs.length; for (uint256 i; i < length;) { uint256 id = _tokenIDs[i]; if (invis.ownerOf(id) == msg.sender && _didInvisibleClaimBirb[id] == false) { _didInvisibleClaimBirb[id] = true; unchecked { ++count; } } unchecked { ++i; } } if (totalSupply() + count > MAX_SUPPLY) revert ExceedsMaxSupply(); _mint(msg.sender, count); } /** @notice Allows users to buy an Early Birb after the claiming window is over */ function buyABirb(uint256 _amount) external payable noContracts() purchaseable() ensureSupply(_amount) { if (_amount > 20) revert WrongAmount(); if (_amount * price != msg.value) revert WrongETHAmount(); _mint(msg.sender, _amount); } // Setters /** @notice Sets the contract-wide royalty info */ function setRoyaltyInfo(address receiver, uint96 feeBasisPoints) external onlyOwner { _setDefaultRoyalty(receiver, feeBasisPoints); } /** @notice Sets the baseURI for the collection */ function setBaseURI(string calldata _baseURI) external onlyOwner { _baseTokenURI = _baseURI; } /** @notice Sets the withdraw address */ function setWithdrawAddress(address _val) external onlyOwner { _withdrawAddress = _val; } /** @notice Sets the price // Important: Set new price in wei (i.e. 50000000000000000 for 0.05 ETH) */ function setPrice(uint _newPrice) external onlyOwner { price = _newPrice; } /** @notice Sets the mint state for the contract */ function setMintState(uint256 _status) external onlyOwner { require(_status <= uint256(MintState.BUY), "Bad status"); _mintState = MintState(_status); } // View Functions /** @notice Overrides ERC721A's default starting token value of 0. Early Birbs IDs run 1-5,000 */ function _startTokenId() internal view virtual override returns (uint256) { return 1; } /** @notice Checks if the Invisible ID was previously used to mint an Early Birb */ function checkIfClaimed(uint256 _id) external view returns (bool) { return _didInvisibleClaimBirb[_id]; } /** @notice Returns the baseURI of the collection */ function _baseURI() internal view virtual override returns (string memory) { return _baseTokenURI; } /** @notice Boilerplate to support ERC721A and ERC2981 */ function supportsInterface(bytes4 interfaceId) public view override(ERC721A, ERC2981) returns (bool) { return super.supportsInterface(interfaceId); } // Withdraw function withdrawFunds() external onlyOwner { (bool sent, ) = payable(_withdrawAddress).call{value: address(this).balance}(''); require(sent, "Withdraw failed"); } }
// SPDX-License-Identifier: MIT // ERC721A Contracts v3.3.0 // Creator: Chiru Labs pragma solidity ^0.8.4; import './IERC721A.sol'; import '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol'; import '@openzeppelin/contracts/utils/Address.sol'; import '@openzeppelin/contracts/utils/Context.sol'; import '@openzeppelin/contracts/utils/Strings.sol'; import '@openzeppelin/contracts/utils/introspection/ERC165.sol'; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension. Built to optimize for lower gas during batch mints. * * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..). * * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply. * * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256). */ contract ERC721A is Context, ERC165, IERC721A { using Address for address; using Strings for uint256; // The tokenId of the next token to be minted. uint256 internal _currentIndex; // The number of tokens burned. uint256 internal _burnCounter; // 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) internal _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; constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; _currentIndex = _startTokenId(); } /** * To change the starting tokenId, please override this function. */ function _startTokenId() internal view virtual returns (uint256) { return 0; } /** * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens. */ function totalSupply() public view override returns (uint256) { // Counter underflow is impossible as _burnCounter cannot be incremented // more than _currentIndex - _startTokenId() times unchecked { return _currentIndex - _burnCounter - _startTokenId(); } } /** * Returns the total amount of tokens minted in the contract. */ function _totalMinted() internal view returns (uint256) { // Counter underflow is impossible as _currentIndex does not decrement, // and it is initialized to _startTokenId() unchecked { return _currentIndex - _startTokenId(); } } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view override returns (uint256) { if (owner == address(0)) revert BalanceQueryForZeroAddress(); return uint256(_addressData[owner].balance); } /** * Returns the number of tokens minted by `owner`. */ function _numberMinted(address owner) internal view returns (uint256) { return uint256(_addressData[owner].numberMinted); } /** * Returns the number of tokens burned by or on behalf of `owner`. */ function _numberBurned(address owner) internal view returns (uint256) { return uint256(_addressData[owner].numberBurned); } /** * Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used). */ function _getAux(address owner) internal view returns (uint64) { return _addressData[owner].aux; } /** * Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used). * If there are multiple variables, please pack them into a uint64. */ function _setAux(address owner, uint64 aux) internal { _addressData[owner].aux = aux; } /** * Gas spent here starts off proportional to the maximum mint batch size. * It gradually moves to O(1) as tokens get transferred around in the collection over time. */ function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) { uint256 curr = tokenId; unchecked { if (_startTokenId() <= curr) if (curr < _currentIndex) { TokenOwnership memory ownership = _ownerships[curr]; if (!ownership.burned) { if (ownership.addr != address(0)) { return ownership; } // Invariant: // There will always be an ownership that has an address and is not burned // before an ownership that does not have an address and is not burned. // Hence, curr will not underflow. while (true) { curr--; ownership = _ownerships[curr]; if (ownership.addr != address(0)) { return ownership; } } } } } revert OwnerQueryForNonexistentToken(); } /** * @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) { if (!_exists(tokenId)) revert URIQueryForNonexistentToken(); string memory baseURI = _baseURI(); return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ''; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ''; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public override { address owner = ERC721A.ownerOf(tokenId); if (to == owner) revert ApprovalToCurrentOwner(); if (_msgSender() != owner) if(!isApprovedForAll(owner, _msgSender())) { revert ApprovalCallerNotOwnerNorApproved(); } _approve(to, tokenId, owner); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view override returns (address) { if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken(); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { if (operator == _msgSender()) revert ApproveToCaller(); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ''); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { _transfer(from, to, tokenId); if (to.isContract()) if(!_checkContractOnERC721Received(from, to, tokenId, _data)) { revert TransferToNonERC721ReceiverImplementer(); } } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), */ function _exists(uint256 tokenId) internal view returns (bool) { return _startTokenId() <= tokenId && tokenId < _currentIndex && !_ownerships[tokenId].burned; } /** * @dev Equivalent to `_safeMint(to, quantity, '')`. */ function _safeMint(address to, uint256 quantity) internal { _safeMint(to, quantity, ''); } /** * @dev Safely mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - If `to` refers to a smart contract, it must implement * {IERC721Receiver-onERC721Received}, which is called for each safe transfer. * - `quantity` must be greater than 0. * * Emits a {Transfer} event. */ function _safeMint( address to, uint256 quantity, bytes memory _data ) internal { uint256 startTokenId = _currentIndex; if (to == address(0)) revert MintToZeroAddress(); if (quantity == 0) revert MintZeroQuantity(); _beforeTokenTransfers(address(0), to, startTokenId, quantity); // Overflows are incredibly unrealistic. // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1 // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1 unchecked { _addressData[to].balance += uint64(quantity); _addressData[to].numberMinted += uint64(quantity); _ownerships[startTokenId].addr = to; _ownerships[startTokenId].startTimestamp = uint64(block.timestamp); uint256 updatedIndex = startTokenId; uint256 end = updatedIndex + quantity; if (to.isContract()) { do { emit Transfer(address(0), to, updatedIndex); if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) { revert TransferToNonERC721ReceiverImplementer(); } } while (updatedIndex < end); // Reentrancy protection if (_currentIndex != startTokenId) revert(); } else { do { emit Transfer(address(0), to, updatedIndex++); } while (updatedIndex < end); } _currentIndex = updatedIndex; } _afterTokenTransfers(address(0), to, startTokenId, quantity); } /** * @dev Mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `quantity` must be greater than 0. * * Emits a {Transfer} event. */ function _mint(address to, uint256 quantity) internal { uint256 startTokenId = _currentIndex; if (to == address(0)) revert MintToZeroAddress(); if (quantity == 0) revert MintZeroQuantity(); _beforeTokenTransfers(address(0), to, startTokenId, quantity); // Overflows are incredibly unrealistic. // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1 // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1 unchecked { _addressData[to].balance += uint64(quantity); _addressData[to].numberMinted += uint64(quantity); _ownerships[startTokenId].addr = to; _ownerships[startTokenId].startTimestamp = uint64(block.timestamp); uint256 updatedIndex = startTokenId; uint256 end = updatedIndex + quantity; do { emit Transfer(address(0), to, updatedIndex++); } while (updatedIndex < end); _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); if (prevOwnership.addr != from) revert TransferFromIncorrectOwner(); bool isApprovedOrOwner = (_msgSender() == from || isApprovedForAll(from, _msgSender()) || getApproved(tokenId) == _msgSender()); if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved(); if (to == address(0)) revert TransferToZeroAddress(); _beforeTokenTransfers(from, to, tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, from); // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256. unchecked { _addressData[from].balance -= 1; _addressData[to].balance += 1; TokenOwnership storage currSlot = _ownerships[tokenId]; currSlot.addr = to; currSlot.startTimestamp = 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; TokenOwnership storage nextSlot = _ownerships[nextTokenId]; if (nextSlot.addr == address(0)) { // This will suffice for checking _exists(nextTokenId), // as a burned slot cannot contain the zero address. if (nextTokenId != _currentIndex) { nextSlot.addr = from; nextSlot.startTimestamp = prevOwnership.startTimestamp; } } } emit Transfer(from, to, tokenId); _afterTokenTransfers(from, to, tokenId, 1); } /** * @dev Equivalent to `_burn(tokenId, false)`. */ function _burn(uint256 tokenId) internal virtual { _burn(tokenId, false); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId, bool approvalCheck) internal virtual { TokenOwnership memory prevOwnership = _ownershipOf(tokenId); address from = prevOwnership.addr; if (approvalCheck) { bool isApprovedOrOwner = (_msgSender() == from || isApprovedForAll(from, _msgSender()) || getApproved(tokenId) == _msgSender()); if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved(); } _beforeTokenTransfers(from, address(0), tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, from); // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256. unchecked { AddressData storage addressData = _addressData[from]; addressData.balance -= 1; addressData.numberBurned += 1; // Keep track of who burned the token, and the timestamp of burning. TokenOwnership storage currSlot = _ownerships[tokenId]; currSlot.addr = from; currSlot.startTimestamp = uint64(block.timestamp); currSlot.burned = true; // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it. // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. uint256 nextTokenId = tokenId + 1; TokenOwnership storage nextSlot = _ownerships[nextTokenId]; if (nextSlot.addr == address(0)) { // This will suffice for checking _exists(nextTokenId), // as a burned slot cannot contain the zero address. if (nextTokenId != _currentIndex) { nextSlot.addr = from; nextSlot.startTimestamp = prevOwnership.startTimestamp; } } } emit Transfer(from, address(0), tokenId); _afterTokenTransfers(from, address(0), tokenId, 1); // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times. unchecked { _burnCounter++; } } /** * @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); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target 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 _checkContractOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { 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 TransferToNonERC721ReceiverImplementer(); } else { assembly { revert(add(32, reason), mload(reason)) } } } } /** * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting. * And also called before burning one token. * * 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`. * - When `to` is zero, `tokenId` will be burned by `from`. * - `from` and `to` are never both zero. */ 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. * And also called after one token has been burned. * * 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` has been * transferred to `to`. * - When `from` is zero, `tokenId` has been minted for `to`. * - When `to` is zero, `tokenId` has been burned by `from`. * - `from` and `to` are never both zero. */ function _afterTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/common/ERC2981.sol) pragma solidity ^0.8.0; import "../../interfaces/IERC2981.sol"; import "../../utils/introspection/ERC165.sol"; /** * @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information. * * Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for * specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first. * * Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the * fee is specified in basis points by default. * * IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See * https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to * voluntarily pay royalties together with sales, but note that this standard is not yet widely supported. * * _Available since v4.5._ */ abstract contract ERC2981 is IERC2981, ERC165 { struct RoyaltyInfo { address receiver; uint96 royaltyFraction; } RoyaltyInfo private _defaultRoyaltyInfo; mapping(uint256 => RoyaltyInfo) private _tokenRoyaltyInfo; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165) returns (bool) { return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId); } /** * @inheritdoc IERC2981 */ function royaltyInfo(uint256 _tokenId, uint256 _salePrice) public view virtual override returns (address, uint256) { RoyaltyInfo memory royalty = _tokenRoyaltyInfo[_tokenId]; if (royalty.receiver == address(0)) { royalty = _defaultRoyaltyInfo; } uint256 royaltyAmount = (_salePrice * royalty.royaltyFraction) / _feeDenominator(); return (royalty.receiver, royaltyAmount); } /** * @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a * fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an * override. */ function _feeDenominator() internal pure virtual returns (uint96) { return 10000; } /** * @dev Sets the royalty information that all ids in this contract will default to. * * Requirements: * * - `receiver` cannot be the zero address. * - `feeNumerator` cannot be greater than the fee denominator. */ function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual { require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice"); require(receiver != address(0), "ERC2981: invalid receiver"); _defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator); } /** * @dev Removes default royalty information. */ function _deleteDefaultRoyalty() internal virtual { delete _defaultRoyaltyInfo; } /** * @dev Sets the royalty information for a specific token id, overriding the global default. * * Requirements: * * - `tokenId` must be already minted. * - `receiver` cannot be the zero address. * - `feeNumerator` cannot be greater than the fee denominator. */ function _setTokenRoyalty( uint256 tokenId, address receiver, uint96 feeNumerator ) internal virtual { require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice"); require(receiver != address(0), "ERC2981: Invalid parameters"); _tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator); } /** * @dev Resets royalty information for the token id back to the global default. */ function _resetTokenRoyalty(uint256 tokenId) internal virtual { delete _tokenRoyaltyInfo[tokenId]; } }
// SPDX-License-Identifier: MIT // ERC721A Contracts v3.3.0 // Creator: Chiru Labs pragma solidity ^0.8.4; import '@openzeppelin/contracts/token/ERC721/IERC721.sol'; import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol'; /** * @dev Interface of an ERC721A compliant contract. */ interface IERC721A is IERC721, IERC721Metadata { /** * The caller must own the token or be an approved operator. */ error ApprovalCallerNotOwnerNorApproved(); /** * The token does not exist. */ error ApprovalQueryForNonexistentToken(); /** * The caller cannot approve to their own address. */ error ApproveToCaller(); /** * The caller cannot approve to the current owner. */ error ApprovalToCurrentOwner(); /** * Cannot query the balance for the zero address. */ error BalanceQueryForZeroAddress(); /** * Cannot mint to the zero address. */ error MintToZeroAddress(); /** * The quantity of tokens minted must be more than zero. */ error MintZeroQuantity(); /** * The token does not exist. */ error OwnerQueryForNonexistentToken(); /** * The caller must own the token or be an approved operator. */ error TransferCallerNotOwnerNorApproved(); /** * The token must be owned by `from`. */ error TransferFromIncorrectOwner(); /** * Cannot safely transfer to a contract that does not implement the ERC721Receiver interface. */ error TransferToNonERC721ReceiverImplementer(); /** * Cannot transfer to the zero address. */ error TransferToZeroAddress(); /** * The token does not exist. */ error URIQueryForNonexistentToken(); // Compiler will pack this into a single 256bit word. struct TokenOwnership { // The address of the owner. address addr; // Keeps track of the start time of ownership with minimal overhead for tokenomics. uint64 startTimestamp; // Whether the token has been burned. bool burned; } // Compiler will pack this into a single 256bit word. struct AddressData { // Realistically, 2**64-1 is more than enough. uint64 balance; // Keeps track of mint count with minimal overhead for tokenomics. uint64 numberMinted; // Keeps track of burn count with minimal overhead for tokenomics. uint64 numberBurned; // For miscellaneous variable(s) pertaining to the address // (e.g. number of whitelist mint slots used). // If there are multiple variables, please pack them into a uint64. uint64 aux; } /** * @dev Returns the total amount of tokens stored by the contract. * * Burned tokens are calculated here, use `_totalMinted()` if you want to count just minted tokens. */ function totalSupply() external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (interfaces/IERC2981.sol) pragma solidity ^0.8.0; import "../utils/introspection/IERC165.sol"; /** * @dev Interface for the NFT Royalty Standard. * * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal * support for royalty payments across all NFT marketplaces and ecosystem participants. * * _Available since v4.5._ */ interface IERC2981 is IERC165 { /** * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of * exchange. The royalty amount is denominated and should be paid in that same unit of exchange. */ function royaltyInfo(uint256 tokenId, uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount); }
{ "optimizer": { "enabled": false, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ApprovalCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"ApprovalQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"ApprovalToCurrentOwner","type":"error"},{"inputs":[],"name":"ApproveToCaller","type":"error"},{"inputs":[],"name":"BalanceQueryForZeroAddress","type":"error"},{"inputs":[],"name":"BuyClosed","type":"error"},{"inputs":[],"name":"ClaimClosed","type":"error"},{"inputs":[],"name":"ExceedsMaxSupply","type":"error"},{"inputs":[],"name":"MintToZeroAddress","type":"error"},{"inputs":[],"name":"MintZeroQuantity","type":"error"},{"inputs":[],"name":"NoContracts","type":"error"},{"inputs":[],"name":"OwnerQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"TransferCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"TransferFromIncorrectOwner","type":"error"},{"inputs":[],"name":"TransferToNonERC721ReceiverImplementer","type":"error"},{"inputs":[],"name":"TransferToZeroAddress","type":"error"},{"inputs":[],"name":"URIQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"WrongAmount","type":"error"},{"inputs":[],"name":"WrongETHAmount","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"MAX_SUPPLY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_baseTokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"_didInvisibleClaimBirb","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_mintState","outputs":[{"internalType":"enum TheEarlyBirbs.MintState","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_withdrawAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"buyABirb","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_id","type":"uint256"}],"name":"checkIfClaimed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"_tokenIDs","type":"uint256[]"}],"name":"hatchEarlyBirbs","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"price","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"uint256","name":"_salePrice","type":"uint256"}],"name":"royaltyInfo","outputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_baseURI","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_status","type":"uint256"}],"name":"setMintState","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_newPrice","type":"uint256"}],"name":"setPrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint96","name":"feeBasisPoints","type":"uint96"}],"name":"setRoyaltyInfo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_val","type":"address"}],"name":"setWithdrawAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawFunds","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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A token is a representation of an on-chain or off-chain asset. The token page shows information such as price, total supply, holders, transfers and social links. Learn more about this page in our Knowledge Base.