ERC-721
Overview
Max Total Supply
9,000 VAL
Holders
2,106
Market
Volume (24H)
0.7401 ETH
Min Price (24H)
$176.77 @ 0.070000 ETH
Max Price (24H)
$1,515.15 @ 0.600000 ETH
Other Info
Token Contract
Balance
0 VALLoading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
Valhalla
Compiler Version
v0.8.13+commit.abaa5c0e
Optimization Enabled:
Yes with 1000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import "./token/ERC721V.sol"; import "./utils/ERC2981.sol"; import "./utils/IERC165.sol"; import "./utils/Ownable.sol"; import "./utils/ECDSA.sol"; ///////////////////////////////////////////////////////////////////////////// // // // // // βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ // // βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ // // βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ // // βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ // // βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ // // βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ // // // // // ///////////////////////////////////////////////////////////////////////////// /** * Subset of a Presale with only the methods that the main minting contract will call. */ interface Presale { function selectedBids(address presaleAddr) external view returns (uint256); } /** * Subset of the IOperatorFilterRegistry with only the methods that the main minting contract will call. * The owner of the collection is able to manage the registry subscription on the contract's behalf */ interface IOperatorFilterRegistry { function isOperatorAllowed( address registrant, address operator ) external returns (bool); } contract Valhalla is ERC721V, Ownable, ERC2981 { using ECDSA for bytes32; // ============================================================= // Structs // ============================================================= // Compiler will pack this into one 256-bit word struct AuctionParams { // auctionNumber; also tracks which bidIndexes are currently live uint16 index; // Following 2 values will be multiplied by 1 GWEI or 0.000000001 ETH // Bid values with GWEI lower than this denomination do NOT add to a bid. uint56 startPrice; uint56 minStackedBidIncrement; // new bids must beat the lowest bid by this percentage. This is a whole // percentage number, a value of 10 means new bids must beat old ones by 10% uint8 minBidIncrementPercentage; // Optional parameter for if a bid was submitted within seconds of ending, // endTimestamp will extend to block.timestamp+timeBuffer if that value is greater. uint16 timeBuffer; // When the auction can start getting bidded on uint48 startTimestamp; // When the auction can no longer get bidded on uint48 endTimestamp; // How many tokens are up for auction. If 0, there is NO auction live. uint8 numTokens; } struct Bid { address bidder; uint192 amount; uint64 bidTime; } struct BidIndex { uint8 index; bool isSet; } // ============================================================= // Constants // ============================================================= // Set on contract initialization address public immutable PRESALE_ADDRESS; // Proof of hash will be given after reveal. string public MINT_PROVENANCE_HASH = "037226b21636376001dbfd22f52d1dd72845efa9613baf51a6a011ac731b2327"; // Owner will be minting this amount to the treasury which happens before // any presale or regular sale. Once totalSupply() is over this amount, // no more can get minted by {mintDev} uint256 public constant TREASURY_SUPPLY = 300; // Maximum tokens that can be minted from {mintTier} and {mintPublic} uint256 public constant MINT_CAP = 9000; // Public mint is unlikely to be enabled as it will get botted, but if // is needed this will make it a tiny bit harder to bot the entire remaining. uint256 public constant MAX_PUBLIC_MINT_TXN_SIZE = 5; // Proof of hash will be given after all tokens are auctioned. string public AUCTION_PROVENANCE_HASH = "eb8c88969a4b776d757de962a194f5b4ffaaadb991ecfbb24d806c7bc6397d30"; // Multiplier for minBidPrice and minBidIncrement to verify bids are large enough // Is used so that we can save storage space and fit the auctionParams into one uint256 uint256 public constant AUCTION_PRICE_MULTIPLIER = 1 gwei; uint256 public constant AUCTION_SUPPLY = 1000; // At most 5 tokens can be bid on at once uint256 public constant MAX_NUM_BIDS = 5; // Cheaper gaswise to set this as 10000 instead of MINT_CAP + AUCTION_SUPPLY uint256 public constant TOTAL_SUPPLY = 10000; // ============================================================= // STORAGE // ============================================================= // Address that houses the implemention to check if operators are allowed or not address public operatorFilterRegistryAddress; // Address this contract verifies with the registryAddress for allowed operators. address public filterRegistrant; // Address that will link to the tokenDNA which the metadata relies on. address public dnaContractAddress; /** * Lockup timestamps are saved in uint24 to fit into the _extraData for the _packedOwnerships * mapping of ERC721A tokens. In order to still represent a large range of times, we will * be saving the hour the token gets unlocked. * * In {_beforeTokenTransfers}, _extraData * 3600 will be compared with the current block.timestamp. */ uint24 public firstUnlockTime; uint24 public secondUnlockTime; uint24 public thirdUnlockTime; // Determines whether a presale address has already gotten its presale tokens mapping(address => bool) public presaleMinted; // If a presale address wants their tokens to land in a different wallet mapping(address => address) public presaleDelegation; string public tokenUriBase; // Address used for {mintTier} which will be a majority of the transactions address public signer; // Used to quickly invalidate batches of signatures if needed. uint256 public signatureVersion; // Mapping that shows if a tier is active or not mapping(string => bool) public isTierActive; mapping(bytes32 => bool) public signatureUsed; // Price of a single public mint, {mintPublic} is NOT enabled while this value is 0. uint256 public publicMintPrice; // Address that is permitted to start and stop auctions address public auctioneer; // The current highest bids made in the auction Bid[MAX_NUM_BIDS] public activeBids; // The mapping between an address and its active bid. The isSet flag differentiates the default // uint value 0 from an actual 0 value. mapping(uint256 => mapping(address => BidIndex)) public bidIndexes; // All parameters needed to run an auction AuctionParams public auctionParams; // ETH reserved due to a live auction, cannot be withdrawn by the owner until the // owner calls {endAuction} which also mints out the tokens. uint256 public reserveAuctionETH; // ============================================================= // Events // ============================================================= event TokenLocked(uint256 indexed tokenId, uint256 unlockTimeHr); event TokenUnlocked(uint256 indexed tokenId); event AuctionStarted(uint256 indexed index); event NewBid( uint256 indexed auctionIndex, address indexed bidder, uint256 value ); event BidIncreased( uint256 indexed auctionIndex, address indexed bidder, uint256 oldValue, uint256 increment ); event AuctionExtended(uint256 indexed index); // ============================================================= // Constructor // ============================================================= constructor(address initialPresale) ERC721V("Valhalla", "VAL") { PRESALE_ADDRESS = initialPresale; } /** * @dev Returns the starting token ID. * To change the starting token ID, please override this function. */ function _startTokenId() internal view virtual override returns (uint256) { return 1; } // ============================================================= // IERC165 // ============================================================= /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified) * to learn more about how these ids are created. * * This function call must use less than 30000 gas. */ function supportsInterface( bytes4 interfaceId ) public view virtual override(ERC721V, ERC2981) returns (bool) { // The interface IDs are constants representing the first 4 bytes // of the XOR of all function selectors in the interface. // See: [ERC165](https://eips.ethereum.org/EIPS/eip-165) // (e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)`) return ERC721V.supportsInterface(interfaceId) || ERC2981.supportsInterface(interfaceId); } // ============================================================= // IERC2981 // ============================================================= /** * @notice Allows the owner to set default royalties following EIP-2981 royalty standard. */ function setDefaultRoyalty( address receiver, uint96 feeNumerator ) external onlyOwner { _setDefaultRoyalty(receiver, feeNumerator); } // ============================================================= // Token Metadata // ============================================================= function tokenURI( uint256 tokenId ) public view override returns (string memory) { return string(abi.encodePacked(tokenUriBase, _toString(tokenId))); } /** * @notice Allows the owner to set the base token URI. */ function setTokenURI(string memory newUriBase) external onlyOwner { tokenUriBase = newUriBase; } /** * @notice Allows the owner to set the dna contract address. */ function setDnaContract(address dnaAddress) external onlyOwner { dnaContractAddress = dnaAddress; } // ============================================================= // Operator Filter Registry // ============================================================= /** * @dev Stops operators from being added as an approved address to transfer. * @param operator the address a wallet is trying to grant approval to. */ function _beforeApproval(address operator) internal virtual override { if (operatorFilterRegistryAddress.code.length > 0) { if ( !IOperatorFilterRegistry(operatorFilterRegistryAddress) .isOperatorAllowed(filterRegistrant, operator) ) { revert OperatorNotAllowed(); } } super._beforeApproval(operator); } /** * @dev Stops operators that are not approved from doing transfers. */ function _beforeTokenTransfers( address from, address to, uint256 tokenId, uint256 quantity ) internal virtual override { if (operatorFilterRegistryAddress.code.length > 0) { if ( !IOperatorFilterRegistry(operatorFilterRegistryAddress) .isOperatorAllowed(filterRegistrant, msg.sender) ) { revert OperatorNotAllowed(); } } // expiration time represented in hours. multiply by 60 * 60, or 3600. if (_getExtraDataAt(tokenId) * 3600 > block.timestamp) revert TokenTransferLocked(); super._beforeTokenTransfers(from, to, tokenId, quantity); } /** * @notice Allows the owner to set a new registrant contract. */ function setOperatorFilterRegistryAddress( address registryAddress ) external onlyOwner { operatorFilterRegistryAddress = registryAddress; } /** * @notice Allows the owner to set a new registrant address. */ function setFilterRegistrant(address newRegistrant) external onlyOwner { filterRegistrant = newRegistrant; } // ============================================================= // Presale // ============================================================= /** * @notice Allows the owner to mint from treasury supply. */ function mintDev( address[] memory mintAddresses, uint256[] memory mintQuantities ) external onlyOwner { for (uint256 i = 0; i < mintAddresses.length; ++i) { _mint(mintAddresses[i], mintQuantities[i]); if (totalSupply() > TREASURY_SUPPLY) revert OverDevSupplyLimit(); } } /** * @notice Allows the owner to set the presale unlock times. */ function setUnlockTimes( uint24 first, uint24 second, uint24 third ) external onlyOwner { firstUnlockTime = first; secondUnlockTime = second; thirdUnlockTime = third; } /** * @notice Allows selected presale addresses to assign wallet address to receive presale mints. * @dev This does not do anything for addresses that were not selected on the presale contract. */ function setPresaleMintAddress(address addr) external { presaleDelegation[msg.sender] = addr; } /** * @notice Allows owner to mint presale tokens. The ordering is randomzied on-chain so * that the owner does not have control over which users get which tokens when uploading * an array of presaleUsers * @dev Presale contract already guarantees a cap on the # of presale tokens, so * we will not check supply against the MINT_CAP in order to save gas. */ function mintPresale(address[] memory presaleUsers) external onlyOwner { uint256 nextId = _nextTokenId(); uint256 supplyLeft = presaleUsers.length; while (supplyLeft > 0) { // generate a random index less than the supply left uint256 randomIndex = uint256( keccak256(abi.encodePacked(block.timestamp, supplyLeft)) ) % supplyLeft; address presaleUser = presaleUsers[randomIndex]; if (presaleMinted[presaleUser]) revert PresaleAddressAlreadyMinted(); presaleMinted[presaleUser] = true; uint256 tokensOwed = Presale(PRESALE_ADDRESS).selectedBids( presaleUser ); _mintPresaleAddress(presaleUser, nextId, tokensOwed); unchecked { --supplyLeft; // Replace the chosen address with the last address not chosen presaleUsers[randomIndex] = presaleUsers[supplyLeft]; nextId += tokensOwed; } } } /** * @dev mints a certain amount of tokens to the presale address or its delegation * if it has delegated another wallet. These tokens will be locked up and released * 1/3rd of the amounts at a time. */ function _mintPresaleAddress( address presale, uint256 nextId, uint256 amount ) internal { if (presaleDelegation[presale] != address(0)) { _mint(presaleDelegation[presale], amount); } else { _mint(presale, amount); } unchecked { // Cheaper gas wise to do every 3 tokens and deal with the remainder afterwards // than to do if statements within the loop. for (uint256 j = 0; j < amount / 3; ) { uint256 start = nextId + j * 3; _setExtraDataAt(start, thirdUnlockTime); _setExtraDataAt(start + 1, secondUnlockTime); _setExtraDataAt(start + 2, firstUnlockTime); emit TokenLocked(start, thirdUnlockTime); emit TokenLocked(start + 1, secondUnlockTime); emit TokenLocked(start + 2, firstUnlockTime); ++j; } // temporarily adjust nextId to do minimal subtractions // when setting `extraData` field nextId += amount - 1; if (amount % 3 == 2) { _setExtraDataAt(nextId - 1, thirdUnlockTime); emit TokenLocked(nextId - 1, thirdUnlockTime); _setExtraDataAt(nextId, secondUnlockTime); emit TokenLocked(nextId, secondUnlockTime); } else if (amount % 3 == 1) { _setExtraDataAt(nextId, thirdUnlockTime); emit TokenLocked(nextId, thirdUnlockTime); } } } // ============================================================= // External Mint Methods // ============================================================= /** * @notice Allows the owner to change the active version of their signatures, this also * allows a simple invalidation of all signatures they have created on old versions. */ function setSigner(address signer_) external onlyOwner { signer = signer_; } /** * @notice Allows the owner to change the active version of their signatures, this also * allows a simple invalidation of all signatures they have created on old versions. */ function setSignatureVersion(uint256 version) external onlyOwner { signatureVersion = version; } /** * @notice Allows owner to sets if a certain tier is active or not. */ function setIsTierActive( string memory tier, bool active ) external onlyOwner { isTierActive[tier] = active; } /** * @notice Tiered mint for allegiants, immortals, and presale bidders. * @dev After a tier is activated by the owner, users with the proper signature for that * tier are able to mint based on what the owner has approved for their wallet. */ function mintTier( string memory tier, uint256 price, uint256 version, uint256 allowedAmount, uint256 buyAmount, bytes memory sig ) external payable { if (totalSupply() + buyAmount > MINT_CAP) revert OverMintLimit(); if (!isTierActive[tier]) revert TierNotActive(); if (version != signatureVersion) revert InvalidSignatureVersion(); if (buyAmount > allowedAmount) revert InvalidSignatureBuyAmount(); if (msg.value != price * buyAmount) revert IncorrectMsgValue(); bytes32 hash = ECDSA.toEthSignedMessageHash( keccak256( abi.encode( tier, address(this), price, version, allowedAmount, msg.sender ) ) ); if (signatureUsed[hash]) revert SignatureAlreadyUsed(); signatureUsed[hash] = true; if (hash.recover(sig) != signer) revert InvalidSignature(); _mint(msg.sender, buyAmount); } /** * @notice Allows the owner to set the public mint price. * @dev If this is 0, it is assumed that the public mint is not active. */ function setPublicMintPrice(uint256 price) external onlyOwner { publicMintPrice = price; } /** * @notice Public mint method. Will not work while {publicMintPrice} is 0. * Unlikely to be enabled because it can be easily botted. */ function mintPublic(uint256 amount) external payable { if (tx.origin != msg.sender) revert NotEOA(); if (totalSupply() + amount > MINT_CAP) revert OverMintLimit(); if (publicMintPrice == 0) revert PublicMintNotLive(); if (amount > MAX_PUBLIC_MINT_TXN_SIZE) revert OverMintLimit(); if (msg.value != amount * publicMintPrice) revert IncorrectMsgValue(); _mint(msg.sender, amount); } // ============================================================= // Auction Methods // ============================================================= /** * @notice Allows the owner to set the auction parameters */ function setOverallAuctionParams( uint40 startPrice_, uint40 minStackedBidIncrement_, uint8 minBidIncrementPercentage_, uint16 timeBuffer_ ) external onlyOwner { auctionParams.startPrice = startPrice_; auctionParams.minStackedBidIncrement = minStackedBidIncrement_; auctionParams.minBidIncrementPercentage = minBidIncrementPercentage_; auctionParams.timeBuffer = timeBuffer_; } /** * @notice Allows the owner to set the auctioneer address. */ function setAuctioneer(address auctioneer_) external onlyOwner { auctioneer = auctioneer_; } /** * @notice Allows the autioneer to start the auction of `numTokens` from `startTime` to `endTime`. * @dev Auctions can only start after all minting has terminated. We cannot auction more than * MAX_NUM_BIDS at a time. Only one auction can be live at a time. */ function startAuction( uint8 numTokens, uint48 startTime, uint48 endTime ) external { if (auctioneer != msg.sender) revert CallerNotAuctioneer(); if (totalSupply() < MINT_CAP) revert MintingNotFinished(); if (totalSupply() + numTokens > TOTAL_SUPPLY) revert OverTokenLimit(); if (numTokens > MAX_NUM_BIDS) revert OverMaxBids(); if (auctionParams.numTokens != 0) revert AuctionStillLive(); if (auctionParams.startPrice == 0) revert AuctionParamsNotInitialized(); auctionParams.numTokens = numTokens; auctionParams.startTimestamp = startTime; auctionParams.endTimestamp = endTime; emit AuctionStarted(auctionParams.index); } /** * @notice Allows the auctioneer to end the auction. * @dev Auctions can end at any time by the owner's discretion and when it ends all * current bids are accepted. The owner is also now able to withdraw the funds * that were reserved for the auction, and active bids data id reset. */ function endAuction() external { if (auctioneer != msg.sender) revert CallerNotAuctioneer(); if (auctionParams.numTokens == 0) revert AuctionNotLive(); uint256 lowestPrice = activeBids[getBidIndexToUpdate()].amount; for (uint256 i = 0; i < auctionParams.numTokens; ) { if (activeBids[i].bidder == address(0)) { break; } _mint(activeBids[i].bidder, 1); // getBidIndex to update gaurantees no activeBids[i] is less than lowestPrice. unchecked { _transferETH( activeBids[i].bidder, activeBids[i].amount - lowestPrice ); ++i; } } unchecked { ++auctionParams.index; } auctionParams.numTokens = 0; delete activeBids; reserveAuctionETH = 0; } /** * @notice Gets the index of the entry in activeBids to update * @dev The index to return will be decided by the following rules: * If there are less than auctionTokens bids, the index of the first empty slot is returned. * If there are auctionTokens or more bids, the index of the lowest value bid is returned. If * there is a tie, the most recent bid with the low amount will be returned. If there is a tie * among bidTimes, the highest index is chosen. */ function getBidIndexToUpdate() public view returns (uint8) { uint256 minAmount = activeBids[0].amount; // If the first value is 0 then we can assume that no bids have been submitted if (minAmount == 0) { return 0; } uint8 minIndex = 0; uint64 minBidTime = activeBids[0].bidTime; for (uint8 i = 1; i < auctionParams.numTokens; ) { uint256 bidAmount = activeBids[i].amount; uint64 bidTime = activeBids[i].bidTime; // A zero bidAmount means the slot is empty because we enforce non-zero bid amounts if (bidAmount == 0) { return i; } else if ( bidAmount < minAmount || (bidAmount == minAmount && bidTime >= minBidTime) ) { minAmount = bidAmount; minIndex = i; minBidTime = bidTime; } unchecked { ++i; } } return minIndex; } /** * @notice Handle users' bids * @dev Bids must be made while the auction is live. Bids must meet a minimum reserve price. * * The first {auctionParams.numTokens} bids made will be accepted as valid. Subsequent bids must be a percentage * higher than the lowest of the active bids. When a low bid is replaced, the ETH will * be refunded back to the original bidder. * * If a valid bid comes in within the last `timeBuffer` seconds, the auction will be extended * for another `timeBuffer` seconds. This will continue until no new active bids come in. * * If a wallet makes a bid while it still has an active bid, the second bid will * stack on top of the first bid. If the second bid doesn't meet the `minStackedBidIncrement` * threshold, an error will be thrown. A wallet will only have one active bid at at time. */ function bid() external payable { if (msg.sender != tx.origin) revert NotEOA(); if (auctionParams.numTokens == 0) { revert AuctionNotInitialized(); } if ( block.timestamp < auctionParams.startTimestamp || block.timestamp > auctionParams.endTimestamp ) { revert AuctionNotLive(); } BidIndex memory existingIndex = bidIndexes[auctionParams.index][ msg.sender ]; if (existingIndex.isSet) { // Case when the user already has an active bid if ( msg.value < auctionParams.minStackedBidIncrement * AUCTION_PRICE_MULTIPLIER ) { revert BidIncrementTooLow(); } uint192 oldValue = activeBids[existingIndex.index].amount; unchecked { reserveAuctionETH += msg.value; activeBids[existingIndex.index].amount = oldValue + uint192(msg.value); } activeBids[existingIndex.index].bidTime = uint64(block.timestamp); emit BidIncreased( auctionParams.index, msg.sender, oldValue, msg.value ); } else { if ( msg.value < auctionParams.startPrice * AUCTION_PRICE_MULTIPLIER ) { revert ReservePriceNotMet(); } uint8 lowestBidIndex = getBidIndexToUpdate(); uint256 lowestBidAmount = activeBids[lowestBidIndex].amount; address lowestBidder = activeBids[lowestBidIndex].bidder; unchecked { if ( msg.value < lowestBidAmount + (lowestBidAmount * auctionParams.minBidIncrementPercentage) / 100 ) { revert IncrementalPriceNotMet(); } reserveAuctionETH += msg.value - lowestBidAmount; } // Refund lowest bidder and remove bidIndexes entry if (lowestBidder != address(0)) { delete bidIndexes[auctionParams.index][lowestBidder]; _transferETH(lowestBidder, lowestBidAmount); } activeBids[lowestBidIndex] = Bid({ bidder: msg.sender, amount: uint192(msg.value), bidTime: uint64(block.timestamp) }); bidIndexes[auctionParams.index][msg.sender] = BidIndex({ index: lowestBidIndex, isSet: true }); emit NewBid(auctionParams.index, msg.sender, msg.value); } // Extend the auction if the bid was received within `timeBuffer` of the auction end time if ( auctionParams.endTimestamp - block.timestamp < auctionParams.timeBuffer ) { unchecked { auctionParams.endTimestamp = uint48( block.timestamp + auctionParams.timeBuffer ); } emit AuctionExtended(auctionParams.index); } } // ============================================================= // Miscellaneous // ============================================================= /** * @notice Allows owner to emit TokenUnlocked events * @dev This method does NOT need to be called for locked tokens to be unlocked. * It is here to emit unlock events for marketplaces to know when tokens are * eligible for trade. The burden to call this method on the right tokens at the * correct timestamp is on the owner of the contract. */ function emitTokensUnlocked(uint256[] memory tokens) external onlyOwner { for (uint256 i = 0; i < tokens.length; ) { emit TokenUnlocked(tokens[i]); unchecked { ++i; } } } /** * @notice Allows owner to withdraw a specified amount of ETH to a specified address. */ function withdraw( address withdrawAddress, uint256 amount ) external onlyOwner { unchecked { if (amount > address(this).balance - reserveAuctionETH) { amount = address(this).balance - reserveAuctionETH; } } if (!_transferETH(withdrawAddress, amount)) revert WithdrawFailed(); } /** * @notice Internal function to transfer ETH to a specified address. */ function _transferETH(address to, uint256 value) internal returns (bool) { (bool success, ) = to.call{ value: value, gas: 30000 }(new bytes(0)); return success; } error AuctionNotInitialized(); error AuctionNotLive(); error AuctionParamsNotInitialized(); error AuctionStillLive(); error BidIncrementTooLow(); error CallerNotAuctioneer(); error IncorrectMsgValue(); error IncrementalPriceNotMet(); error InvalidSignatureBuyAmount(); error InvalidSignature(); error InvalidSignatureVersion(); error MintingNotFinished(); error NotEOA(); error OverDevSupplyLimit(); error OverMintLimit(); error OverTokenLimit(); error OverMaxBids(); error OperatorNotAllowed(); error PublicMintNotLive(); error PresaleAddressAlreadyMinted(); error ReservePriceNotMet(); error SignatureAlreadyUsed(); error TierNotActive(); error TokenTransferLocked(); error WithdrawFailed(); }
// SPDX-License-Identifier: MIT // ERC721A Contracts v4.2.3 // Creator: Chiru Labs pragma solidity ^0.8.4; import './IERC721A.sol'; /** * @dev Interface of ERC721 token receiver. */ interface ERC721A__IERC721Receiver { function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } /** * @title ERC721V is a slight improvement upon ERC721A for a few select purposes. * * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension. It is optimized for lower gas during batch mints through the ERC721A implementation * by Chiru Labs (https://github.com/chiru-labs/ERC721A) * * ERC2309 was removed because it will not be used. * Token burning was also removed, but left the reserved bit there. * * Ownership's extraData field was modified to be writable without ownership initialized. This allows for multiple * mints with different extraData values. A token's extraData will be used as a transfer lockup period and will * therefore NOT need to be persisted during a token transfer. * * Both token operator approval methods will call a beforeApproval hook that can be overwritten. * * Assumptions: * * Token IDs are minted in sequential order (e.g. 0, 1, 2, 3, ...) * starting from `_startTokenId()`. * * - An owner cannot have more than 2**64 - 1 (max value of uint64) of supply. * - The maximum token ID cannot exceed 2**256 - 1 (max value of uint256). */ contract ERC721V is IERC721A { // Bypass for a `--via-ir` bug (https://github.com/chiru-labs/ERC721A/pull/364). struct TokenApprovalRef { address value; } // ============================================================= // CONSTANTS // ============================================================= // Mask of an entry in packed address data. uint256 private constant _BITMASK_ADDRESS_DATA_ENTRY = (1 << 64) - 1; // The bit position of `numberMinted` in packed address data. uint256 private constant _BITPOS_NUMBER_MINTED = 64; // The bit position of `numberBurned` in packed address data. uint256 private constant _BITPOS_NUMBER_BURNED = 128; // The bit position of `aux` in packed address data. uint256 private constant _BITPOS_AUX = 192; // Mask of all 256 bits in packed address data except the 64 bits for `aux`. uint256 private constant _BITMASK_AUX_COMPLEMENT = (1 << 192) - 1; // The bit position of `startTimestamp` in packed ownership. uint256 private constant _BITPOS_START_TIMESTAMP = 160; // The bit mask of the `burned` bit in packed ownership. uint256 private constant _BITMASK_BURNED = 1 << 224; // The bit position of the `nextInitialized` bit in packed ownership. uint256 private constant _BITPOS_NEXT_INITIALIZED = 225; // The bit mask of the `nextInitialized` bit in packed ownership. uint256 private constant _BITMASK_NEXT_INITIALIZED = 1 << 225; // The bit position of `extraData` in packed ownership. uint256 private constant _BITPOS_EXTRA_DATA = 232; // Mask of all 256 bits in a packed ownership except the 24 bits for `extraData`. uint256 private constant _BITMASK_EXTRA_DATA_COMPLEMENT = (1 << 232) - 1; // The mask of the lower 160 bits for addresses. uint256 private constant _BITMASK_ADDRESS = (1 << 160) - 1; // The `Transfer` event signature is given by: // `keccak256(bytes("Transfer(address,address,uint256)"))`. bytes32 private constant _TRANSFER_EVENT_SIGNATURE = 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef; // ============================================================= // STORAGE // ============================================================= // The next token ID to be minted. uint256 private _currentIndex; // Burning disabled. // uint256 private _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 {_packedOwnershipOf} implementation for details. // // Bits Layout: // - [0..159] `addr` // - [160..223] `startTimestamp` // - [224] `burned` // - [225] `nextInitialized` // - [232..255] `extraData` mapping(uint256 => uint256) private _packedOwnerships; // Mapping owner address to address data. // // Bits Layout: // - [0..63] `balance` // - [64..127] `numberMinted` // - [128..191] `numberBurned` // - [192..255] `aux` mapping(address => uint256) private _packedAddressData; // Mapping from token ID to approved address. mapping(uint256 => TokenApprovalRef) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; // ============================================================= // CONSTRUCTOR // ============================================================= constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; _currentIndex = _startTokenId(); } // ============================================================= // TOKEN COUNTING OPERATIONS // ============================================================= /** * @dev Returns the starting token ID. * To change the starting token ID, please override this function. */ function _startTokenId() internal view virtual returns (uint256) { return 0; } /** * @dev Returns the next token ID to be minted. */ function _nextTokenId() internal view virtual returns (uint256) { return _currentIndex; } /** * @dev Returns the total number of tokens in existence. * Burned tokens will reduce the count. * To get the total number of tokens minted, please see {_totalMinted}. */ function totalSupply() public view virtual override returns (uint256) { // Counter underflow is impossible as _burnCounter cannot be incremented // more than `_currentIndex - _startTokenId()` times. unchecked { return _currentIndex - _startTokenId(); } } /** * @dev Returns the total amount of tokens minted in the contract. */ function _totalMinted() internal view virtual returns (uint256) { // Counter underflow is impossible as `_currentIndex` does not decrement, // and it is initialized to `_startTokenId()`. unchecked { return _currentIndex - _startTokenId(); } } /** * Burning disabled. * @dev Returns the total number of tokens burned. */ // function _totalBurned() internal view virtual returns (uint256) { // return _burnCounter; // } // ============================================================= // ADDRESS DATA OPERATIONS // ============================================================= /** * @dev Returns the number of tokens in `owner`'s account. */ function balanceOf(address owner) public view virtual override returns (uint256) { if (owner == address(0)) revert BalanceQueryForZeroAddress(); return _packedAddressData[owner] & _BITMASK_ADDRESS_DATA_ENTRY; } /** * Returns the number of tokens minted by `owner`. */ function _numberMinted(address owner) internal view returns (uint256) { return (_packedAddressData[owner] >> _BITPOS_NUMBER_MINTED) & _BITMASK_ADDRESS_DATA_ENTRY; } /** * Returns the number of tokens burned by or on behalf of `owner`. */ function _numberBurned(address owner) internal view returns (uint256) { return (_packedAddressData[owner] >> _BITPOS_NUMBER_BURNED) & _BITMASK_ADDRESS_DATA_ENTRY; } /** * Returns the auxiliary data for `owner`. (e.g. number of whitelist mint slots used). */ function _getAux(address owner) internal view returns (uint64) { return uint64(_packedAddressData[owner] >> _BITPOS_AUX); } /** * Sets the auxiliary 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 virtual { uint256 packed = _packedAddressData[owner]; uint256 auxCasted; // Cast `aux` with assembly to avoid redundant masking. assembly { auxCasted := aux } packed = (packed & _BITMASK_AUX_COMPLEMENT) | (auxCasted << _BITPOS_AUX); _packedAddressData[owner] = packed; } // ============================================================= // IERC165 // ============================================================= /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified) * to learn more about how these ids are created. * * This function call must use less than 30000 gas. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { // The interface IDs are constants representing the first 4 bytes // of the XOR of all function selectors in the interface. // See: [ERC165](https://eips.ethereum.org/EIPS/eip-165) // (e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)`) return interfaceId == 0x01ffc9a7 || // ERC165 interface ID for ERC165. interfaceId == 0x80ac58cd || // ERC165 interface ID for ERC721. interfaceId == 0x5b5e139f; // ERC165 interface ID for ERC721Metadata. } // ============================================================= // IERC721Metadata // ============================================================= /** * @dev Returns the token collection name. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the token collection symbol. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ 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, _toString(tokenId))) : ''; } /** * @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, it can be overridden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ''; } // ============================================================= // OWNERSHIPS OPERATIONS // ============================================================= /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { return address(uint160(_packedOwnershipOf(tokenId))); } /** * @dev Gas spent here starts off proportional to the maximum mint batch size. * It gradually moves to O(1) as tokens get transferred around over time. */ function _ownershipOf(uint256 tokenId) internal view virtual returns (TokenOwnership memory) { return _unpackedOwnership(_packedOwnershipOf(tokenId)); } /** * @dev Returns the unpacked `TokenOwnership` struct at `index`. */ function _ownershipAt(uint256 index) internal view virtual returns (TokenOwnership memory) { return _unpackedOwnership(_packedOwnerships[index]); } /** * @dev Verifies if the address has been set a given ownership value. */ function _ownershipNotInitialized(uint256 ownership) internal pure returns (bool) { return ownership & _BITMASK_EXTRA_DATA_COMPLEMENT == 0; } /** * @dev Initializes the ownership slot minted at `index` for efficiency purposes. */ function _initializeOwnershipAt(uint256 index) internal virtual { if (_ownershipNotInitialized(_packedOwnerships[index])) { _packedOwnerships[index] = _packedOwnershipOf(index); } } /** * Returns the packed ownership data of `tokenId`. */ function _packedOwnershipOf(uint256 tokenId) private view returns (uint256) { uint256 curr = tokenId; unchecked { if (_startTokenId() <= curr) if (curr < _currentIndex) { uint256 packed = _packedOwnerships[curr]; // Burning disabled so we can remove the burned check. // if (packed & _BITMASK_BURNED == 0) { // Invariant: // There will always be an initialized ownership slot // (i.e. `ownership.addr != address(0)) // before an unintialized ownership slot // (i.e. `ownership.addr == address(0)) // Hence, `curr` will not underflow. // // We can directly compare the packed value. // If the address is zero, packed will be zero. while (_ownershipNotInitialized(packed)) { packed = _packedOwnerships[--curr]; } return packed; } } revert OwnerQueryForNonexistentToken(); } /** * @dev Returns the unpacked `TokenOwnership` struct from `packed`. */ function _unpackedOwnership(uint256 packed) private pure returns (TokenOwnership memory ownership) { ownership.addr = address(uint160(packed)); ownership.startTimestamp = uint64(packed >> _BITPOS_START_TIMESTAMP); // Burning disabled // ownership.burned = packed & _BITMASK_BURNED != 0; ownership.extraData = uint24(packed >> _BITPOS_EXTRA_DATA); } /** * @dev Packs ownership data into a single uint256. */ function _packOwnershipData(address owner, uint256 flags) private view returns (uint256 result) { assembly { // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean. owner := and(owner, _BITMASK_ADDRESS) // `owner | (block.timestamp << _BITPOS_START_TIMESTAMP) | flags`. result := or(owner, or(shl(_BITPOS_START_TIMESTAMP, timestamp()), flags)) } } /** * @dev Returns the `nextInitialized` flag set if `quantity` equals 1. */ function _nextInitializedFlag(uint256 quantity) private pure returns (uint256 result) { // For branchless setting of the `nextInitialized` flag. assembly { // `(quantity == 1) << _BITPOS_NEXT_INITIALIZED`. result := shl(_BITPOS_NEXT_INITIALIZED, eq(quantity, 1)) } } // ============================================================= // APPROVAL OPERATIONS // ============================================================= /** * @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) public payable virtual override { _beforeApproval(to); address owner = ownerOf(tokenId); if (_msgSenderERC721A() != owner) if (!isApprovedForAll(owner, _msgSenderERC721A())) { revert ApprovalCallerNotOwnerNorApproved(); } _tokenApprovals[tokenId].value = to; emit Approval(owner, to, tokenId); } /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken(); return _tokenApprovals[tokenId].value; } /** * @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) public virtual override { _beforeApproval(operator); _operatorApprovals[_msgSenderERC721A()][operator] = approved; emit ApprovalForAll(_msgSenderERC721A(), operator, approved); } /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @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. See {_mint}. */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _startTokenId() <= tokenId && tokenId < _currentIndex; // If within bounds, // Burning disabled so we can remove the burned check. // _packedOwnerships[tokenId] & _BITMASK_BURNED == 0; } /** * @dev Returns whether `msgSender` is equal to `approvedAddress` or `owner`. */ function _isSenderApprovedOrOwner( address approvedAddress, address owner, address msgSender ) private pure returns (bool result) { assembly { // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean. owner := and(owner, _BITMASK_ADDRESS) // Mask `msgSender` to the lower 160 bits, in case the upper bits somehow aren't clean. msgSender := and(msgSender, _BITMASK_ADDRESS) // `msgSender == owner || msgSender == approvedAddress`. result := or(eq(msgSender, owner), eq(msgSender, approvedAddress)) } } /** * @dev Returns the storage slot and value for the approved address of `tokenId`. */ function _getApprovedSlotAndAddress(uint256 tokenId) private view returns (uint256 approvedAddressSlot, address approvedAddress) { TokenApprovalRef storage tokenApproval = _tokenApprovals[tokenId]; // The following is equivalent to `approvedAddress = _tokenApprovals[tokenId].value`. assembly { approvedAddressSlot := tokenApproval.slot approvedAddress := sload(approvedAddressSlot) } } // ============================================================= // TRANSFER OPERATIONS // ============================================================= /** * @dev Transfers `tokenId` from `from` to `to`. * * 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 ) public payable virtual override { uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId); if (address(uint160(prevOwnershipPacked)) != from) revert TransferFromIncorrectOwner(); (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId); // The nested ifs save around 20+ gas over a compound boolean condition. if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A())) if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved(); if (to == address(0)) revert TransferToZeroAddress(); _beforeTokenTransfers(from, to, tokenId, 1); // Clear approvals from the previous owner. assembly { if approvedAddress { // This is equivalent to `delete _tokenApprovals[tokenId]`. sstore(approvedAddressSlot, 0) } } // 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 { // We can directly increment and decrement the balances. --_packedAddressData[from]; // Updates: `balance -= 1`. ++_packedAddressData[to]; // Updates: `balance += 1`. // Updates: // - `address` to the next owner. // - `startTimestamp` to the timestamp of transfering. // - `burned` to `false`. // - `nextInitialized` to `true`. // - `extraData` to `0` because we use it for token lockup timestamp. _packedOwnerships[tokenId] = _packOwnershipData( to, _BITMASK_NEXT_INITIALIZED ); // If the next slot may not have been initialized (i.e. `nextInitialized == false`) . if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) { uint256 nextTokenId = tokenId + 1; // If the next slot's address is zero and not burned (i.e. packed value is zero). if (_ownershipNotInitialized(_packedOwnerships[nextTokenId])) { // If the next slot is within bounds. if (nextTokenId != _currentIndex) { // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`. _packedOwnerships[nextTokenId] = (prevOwnershipPacked & _BITMASK_EXTRA_DATA_COMPLEMENT) | (_packedOwnerships[nextTokenId] & ~_BITMASK_EXTRA_DATA_COMPLEMENT); } } } } emit Transfer(from, to, tokenId); _afterTokenTransfers(from, to, tokenId, 1); } /** * @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public payable virtual override { safeTransferFrom(from, to, tokenId, ''); } /** * @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 memory _data ) public payable virtual override { transferFrom(from, to, tokenId); if (to.code.length != 0) if (!_checkContractOnERC721Received(from, to, tokenId, _data)) { revert TransferToNonERC721ReceiverImplementer(); } } /** * @dev Hook that is called before any approval for a token or wallet * * `approvedAddr` - the address a wallet is trying to grant approval to. */ function _beforeApproval(address approvedAddr) internal virtual {} /** * @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 {} /** * @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target contract. * * `from` - Previous owner of the given token ID. * `to` - Target address that will receive the token. * `tokenId` - Token ID to be transferred. * `_data` - Optional data to send along with the call. * * Returns whether the call correctly returned the expected magic value. */ function _checkContractOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { try ERC721A__IERC721Receiver(to).onERC721Received(_msgSenderERC721A(), from, tokenId, _data) returns ( bytes4 retval ) { return retval == ERC721A__IERC721Receiver(to).onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert TransferToNonERC721ReceiverImplementer(); } else { assembly { revert(add(32, reason), mload(reason)) } } } } // ============================================================= // MINT OPERATIONS // ============================================================= /** * @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 for each mint. */ function _mint(address to, uint256 quantity) internal virtual { uint256 startTokenId = _currentIndex; if (quantity == 0) revert MintZeroQuantity(); _beforeTokenTransfers(address(0), to, startTokenId, quantity); // Overflows are incredibly unrealistic. // `balance` and `numberMinted` have a maximum limit of 2**64. // `tokenId` has a maximum limit of 2**256. unchecked { // Updates: // - `balance += quantity`. // - `numberMinted += quantity`. // // We can directly add to the `balance` and `numberMinted`. _packedAddressData[to] += quantity * ((1 << _BITPOS_NUMBER_MINTED) | 1); // Updates: // - `address` to the owner. // - `startTimestamp` to the timestamp of minting. // - `burned` to `false`. // - `nextInitialized` to `quantity == 1`. _packedOwnerships[startTokenId] = _packOwnershipData( to, _nextInitializedFlag(quantity) ); uint256 toMasked; uint256 end = startTokenId + quantity; // Use assembly to loop and emit the `Transfer` event for gas savings. // The duplicated `log4` removes an extra check and reduces stack juggling. // The assembly, together with the surrounding Solidity code, have been // delicately arranged to nudge the compiler into producing optimized opcodes. assembly { // Mask `to` to the lower 160 bits, in case the upper bits somehow aren't clean. toMasked := and(to, _BITMASK_ADDRESS) // Emit the `Transfer` event. log4( 0, // Start of data (0, since no data). 0, // End of data (0, since no data). _TRANSFER_EVENT_SIGNATURE, // Signature. 0, // `address(0)`. toMasked, // `to`. startTokenId // `tokenId`. ) // The `iszero(eq(,))` check ensures that large values of `quantity` // that overflows uint256 will make the loop run out of gas. // The compiler will optimize the `iszero` away for performance. for { let tokenId := add(startTokenId, 1) } iszero(eq(tokenId, end)) { tokenId := add(tokenId, 1) } { // Emit the `Transfer` event. Similar to above. log4(0, 0, _TRANSFER_EVENT_SIGNATURE, 0, toMasked, tokenId) } } if (toMasked == 0) revert MintToZeroAddress(); _currentIndex = end; } _afterTokenTransfers(address(0), to, startTokenId, 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. * * See {_mint}. * * Emits a {Transfer} event for each mint. */ function _safeMint( address to, uint256 quantity, bytes memory _data ) internal virtual { _mint(to, quantity); unchecked { if (to.code.length != 0) { uint256 end = _currentIndex; uint256 index = end - quantity; do { if (!_checkContractOnERC721Received(address(0), to, index++, _data)) { revert TransferToNonERC721ReceiverImplementer(); } } while (index < end); // Reentrancy protection. if (_currentIndex != end) revert(); } } } /** * @dev Equivalent to `_safeMint(to, quantity, '')`. */ function _safeMint(address to, uint256 quantity) internal virtual { _safeMint(to, quantity, ''); } // ============================================================= // BURN OPERATIONS // ============================================================= // /** // * @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 { // uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId); // address from = address(uint160(prevOwnershipPacked)); // (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId); // if (approvalCheck) { // // The nested ifs save around 20+ gas over a compound boolean condition. // if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A())) // if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved(); // } // _beforeTokenTransfers(from, address(0), tokenId, 1); // // Clear approvals from the previous owner. // assembly { // if approvedAddress { // // This is equivalent to `delete _tokenApprovals[tokenId]`. // sstore(approvedAddressSlot, 0) // } // } // // 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 { // // Updates: // // - `balance -= 1`. // // - `numberBurned += 1`. // // // // We can directly decrement the balance, and increment the number burned. // // This is equivalent to `packed -= 1; packed += 1 << _BITPOS_NUMBER_BURNED;`. // _packedAddressData[from] += (1 << _BITPOS_NUMBER_BURNED) - 1; // // Updates: // // - `address` to the last owner. // // - `startTimestamp` to the timestamp of burning. // // - `burned` to `true`. // // - `nextInitialized` to `true`. // _packedOwnerships[tokenId] = _packOwnershipData( // from, // (_BITMASK_BURNED | _BITMASK_NEXT_INITIALIZED) // ); // // If the next slot may not have been initialized (i.e. `nextInitialized == false`) . // if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) { // uint256 nextTokenId = tokenId + 1; // // If the next slot's address is zero and not burned (i.e. packed value is zero). // if (_ownershipNotInitialized(_packedOwnerships[nextTokenId])) { // // If the next slot is within bounds. // if (nextTokenId != _currentIndex) { // // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`. // _packedOwnerships[nextTokenId] = prevOwnershipPacked; // } // } // } // } // emit Transfer(from, address(0), tokenId); // _afterTokenTransfers(from, address(0), tokenId, 1); // // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times. // unchecked { // _burnCounter++; // } // } // ============================================================= // EXTRA DATA OPERATIONS // ============================================================= /** * @dev Directly sets the extra data for the ownership data `index`. */ function _setExtraDataAt(uint256 index, uint24 extraData) internal virtual { uint256 packed = _packedOwnerships[index]; uint256 extraDataCasted; // Cast `extraData` with assembly to avoid redundant masking. assembly { extraDataCasted := extraData } packed = (packed & _BITMASK_EXTRA_DATA_COMPLEMENT) | (extraDataCasted << _BITPOS_EXTRA_DATA); _packedOwnerships[index] = packed; } /** * @dev gets the extra data for the ownership data `index`. This can differ from the * _packedOwnershipOf(index).extraData because if the address is not initialized it will return * the extraData of a different index. */ function _getExtraDataAt(uint256 index) internal virtual returns (uint256) { return _packedOwnerships[index] >> _BITPOS_EXTRA_DATA; } // ============================================================= // OTHER OPERATIONS // ============================================================= /** * @dev Returns the message sender (defaults to `msg.sender`). * * If you are writing GSN compatible contracts, you need to override this function. */ function _msgSenderERC721A() internal view virtual returns (address) { return msg.sender; } /** * @dev Converts a uint256 to its ASCII string decimal representation. */ function _toString(uint256 value) internal pure virtual returns (string memory str) { assembly { // The maximum value of a uint256 contains 78 digits (1 byte per digit), but // we allocate 0xa0 bytes to keep the free memory pointer 32-byte word aligned. // We will need 1 word for the trailing zeros padding, 1 word for the length, // and 3 words for a maximum of 78 digits. Total: 5 * 0x20 = 0xa0. let m := add(mload(0x40), 0xa0) // Update the free memory pointer to allocate. mstore(0x40, m) // Assign the `str` to the end. str := sub(m, 0x20) // Zeroize the slot after the string. mstore(str, 0) // Cache the end of the memory to calculate the length later. let end := str // We write the string from rightmost digit to leftmost digit. // The following is essentially a do-while loop that also handles the zero case. // prettier-ignore for { let temp := value } 1 {} { str := sub(str, 1) // Write the character to the pointer. // The ASCII index of the '0' character is 48. mstore8(str, add(48, mod(temp, 10))) // Keep dividing `temp` until zero. temp := div(temp, 10) // prettier-ignore if iszero(temp) { break } } let length := sub(end, str) // Move the pointer 32 bytes leftwards to make room for the length. str := sub(str, 0x20) // Store the length. mstore(str, length) } } }
// SPDX-License-Identifier: MIT // ERC721A Contracts v4.2.3 // Creator: Chiru Labs pragma solidity ^0.8.4; /** * @dev Interface of ERC721A. */ interface IERC721A { /** * The caller must own the token or be an approved operator. */ error ApprovalCallerNotOwnerNorApproved(); /** * The token does not exist. */ error ApprovalQueryForNonexistentToken(); /** * 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(); /** * The `quantity` minted with ERC2309 exceeds the safety limit. */ error MintERC2309QuantityExceedsLimit(); /** * The `extraData` cannot be set on an unintialized ownership slot. */ error OwnershipNotInitializedForExtraData(); // ============================================================= // STRUCTS // ============================================================= struct TokenOwnership { // The address of the owner. address addr; // Stores the start time of ownership with minimal overhead for tokenomics. uint64 startTimestamp; // Whether the token has been burned. bool burned; // Arbitrary data similar to `startTimestamp` that can be set via {_extraData}. uint24 extraData; } // ============================================================= // TOKEN COUNTERS // ============================================================= /** * @dev Returns the total number of tokens in existence. * Burned tokens will reduce the count. * To get the total number of tokens minted, please see {_totalMinted}. */ function totalSupply() external view returns (uint256); // ============================================================= // IERC165 // ============================================================= /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified) * to learn more about how these ids are created. * * This function call must use less than 30000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); // ============================================================= // IERC721 // ============================================================= /** * @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, bytes calldata data ) external payable; /** * @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external payable; /** * @dev Transfers `tokenId` 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 payable; /** * @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 payable; /** * @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); // ============================================================= // IERC721Metadata // ============================================================= /** * @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/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 (last updated v4.8.0) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; import "./Strings.sol"; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV // Deprecated in v4.8 } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. /// @solidity memory-safe-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address, RecoverError) { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v β {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } }
// 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 v4.7.0) (token/common/ERC2981.sol) pragma solidity ^0.8.0; import "./IERC2981.sol"; import "./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: * * - `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 // 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 pragma solidity ^0.8.9; import "./IERC165.sol"; /** * @dev Interface for the NFT Royalty Standard */ interface IERC2981 is IERC165 { /** * ERC165 bytes to add to interface array - set in parent contract * implementing this standard * * bytes4(keccak256("royaltyInfo(uint256,uint256)")) == 0x2a55205a * bytes4 private constant _INTERFACE_ID_ERC2981 = 0x2a55205a; * _registerInterface(_INTERFACE_ID_ERC2981); */ /** * @notice Called with the sale price to determine how much royalty * is owed and to whom. * @param _tokenId - the NFT asset queried for royalty information * @param _salePrice - the sale price of the NFT asset specified by _tokenId * @return receiver - address of who should be sent the royalty payment * @return royaltyAmount - the royalty payment amount for _salePrice */ function royaltyInfo(uint256 _tokenId, uint256 _salePrice) external view returns (address receiver, uint256 royaltyAmount); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "./Context.sol"; error CallerNotOwner(); error OwnerNotZero(); /** * @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 internal _owner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { if (owner() != _msgSender()) revert CallerNotOwner(); } /** * @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 { if (newOwner == address(0)) revert OwnerNotZero(); _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 v4.7.0) (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @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); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } }
{ "optimizer": { "enabled": true, "runs": 1000 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000001da191b3172acc8b8c27554cf973b6168afcc5ff
-----Decoded View---------------
Arg [0] : initialPresale (address): 0x1dA191b3172acc8B8C27554CF973B6168AFcC5ff
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000001da191b3172acc8b8c27554cf973b6168afcc5ff
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