ERC-721
Overview
Max Total Supply
4,950 ANNOUNCINGZEROGRAVITYVOYAGE1THEJOURNEYFROMZEROTOZI
Holders
4,925
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
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Minimal Proxy Contract for 0x6eadcb3840de4981882e93c39b3998185bfbe8a5
Contract Name:
WritingEditions
Compiler Version
v0.8.19+commit.7dd6d404
Optimization Enabled:
Yes with 200 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; /// > [[[[[[[[[[[ Imports ]]]]]]]]]]] import "./interface/IWritingEditions.sol"; import "./interface/IWritingEditionsFactory.sol"; import "../ERC7015/ERC7015.sol"; import "../observability/interface/IObservability.sol"; import "../fee-configuration/interface/IFeeConfiguration.sol"; import "../renderer/interface/IRenderer.sol"; import "../treasury/Rewards.sol"; import "../treasury/interface/ITreasuryConfiguration.sol"; import "../treasury/interface/ITreasury.sol"; import "../treasury/interface/ITributaryRegistry.sol"; import "../lib/Ownable.sol"; import "../lib/ERC721/ERC721.sol"; import "../lib/ERC165/ERC165.sol"; import "../lib/ERC721/interface/IERC721.sol"; import "../lib/ERC2981/interface/IERC2981.sol"; import "../lib/transaction-reentrancy-guard/TransactionReentrancyGuard.sol"; /// > [[[[[[[[[[[ External Library Imports ]]]]]]]]]]] import "openzeppelin-contracts/contracts/security/ReentrancyGuard.sol"; import "openzeppelin-contracts/contracts/utils/Base64.sol"; import "openzeppelin-contracts/contracts/utils/Strings.sol"; /** * @title WritingEditions * @author MirrorXYZ * @custom:security-contact [email protected] */ contract WritingEditions is ERC7015, Ownable, TransactionReentrancyGuard, ReentrancyGuard, ERC721, IERC721Metadata, IERC2981, IWritingEditions, IWritingEditionEvents, IObservabilityEvents { /// > [[[[[[[[[[[ Version ]]]]]]]]]]] /// @notice Version. uint8 public immutable override VERSION = 3; /// > [[[[[[[[[[[ Authorization ]]]]]]]]]]] /// @notice Address that deploys and initializes clones. address public immutable override factory; /// > [[[[[[[[[[[ Configuration ]]]]]]]]]]] /// @notice Address for Mirror treasury configuration. address public immutable override treasuryConfiguration; /// @notice Address for Mirror's observability contract. address public immutable override o11y; /// > [[[[[[[[[[[ ERC721 Metadata ]]]]]]]]]]] /// @notice Token name. string public override name; /// @notice Token symbol. string public override symbol; /// @notice Base URI for description. string internal _baseDescriptionURI; /// > [[[[[[[[[[[ Token Data ]]]]]]]]]]] /// @notice Total supply of editions. Used to calculate next tokenId. uint256 public override totalSupply; /// @notice Token text content, stored in Arweave. string public override contentURI; /// @notice Token image content, stored in IPFS. string public override imageURI; /// @notice Token price, set by the owner. uint256 public override price; /// @notice Token limit, set by the owner. uint256 public override limit; /// @notice Account that will receive funds from sales. address public override fundingRecipient; /// > [[[[[[[[[[[ Royalty Info (ERC2981) ]]]]]]]]]]] /// @notice Account that will receive royalties. address public override royaltyRecipient; /// @notice Royalty basis points. uint256 public override royaltyBPS; /// > [[[[[[[[[[[ Rendering ]]]]]]]]]]] /// @notice Address for a rendering contract, if set, calls to /// `tokenURI(uint256)` are forwarded to this address. address public override renderer; /// > [[[[[[[[[[[ Rewards ]]]]]]]]]]] /// @notice Address for the first minter if they are not the creator. address public override firstMinter; /// > [[[[[[[[[[[ Constructor ]]]]]]]]]]] /// @notice Implementation logic for clones. /// @param _factory the factory contract deploying clones with this implementation. /// @param _treasuryConfiguration Mirror treasury configuration. /// @param _o11y contract for observability. constructor( address _factory, address _treasuryConfiguration, address _o11y ) Ownable(address(0)) TransactionReentrancyGuard(true) ERC7015("WritingEditions", "1") { // Assert not the zero-address. require(_factory != address(0), "must set factory"); // Store factory. factory = _factory; // Assert not the zero-address. require( _treasuryConfiguration != address(0), "must set treasury configuration" ); // Store treasury configuration. treasuryConfiguration = _treasuryConfiguration; // Assert not the zero-address. require(_o11y != address(0), "must set observability"); // Store observability. o11y = _o11y; } /// > [[[[[[[[[[[ Initializing ]]]]]]]]]]] /// @notice Initialize a clone with a signature by storing edition parameters. /// Called only by the factory. Mints the first edition to `tokenRecipient`. /// @param _creator the token creator /// @param structHash the salt parameter for ERC7015 /// @param signature the signature of the creator /// @param edition edition parameters used to deploy the clone. /// @param tokenRecipient account that will receive the first minted token. /// @param message message sent with the token purchase, not stored. function initializeWithSignature( address _creator, bytes32 structHash, bytes calldata signature, WritingEdition memory edition, address tokenRecipient, string memory message, address mintReferral, bool _guardOn, address sender ) external payable override nonReentrant { _validateSignature(_creator, structHash, signature); // Set first minter. if (sender != _creator) { firstMinter = sender; } _initialize( _creator, edition, tokenRecipient, message, mintReferral, _guardOn ); } /// @notice Initialize a clone by storing edition parameters. Called only /// by the factory. Mints the first edition to `tokenRecipient`. /// @param _creator owner of the clone. /// @param edition edition parameters used to deploy the clone. /// @param tokenRecipient account that will receive the first minted token. /// @param message message sent with the token purchase, not stored. function initialize( address _creator, WritingEdition memory edition, address tokenRecipient, string memory message, address mintReferral, bool _guardOn ) external payable override nonReentrant { _initialize( _creator, edition, tokenRecipient, message, mintReferral, _guardOn ); } function _initialize( address _creator, WritingEdition memory edition, address tokenRecipient, string memory message, address mintReferral, bool _guardOn ) internal { // Only factory can call this function. require(msg.sender == factory, "unauthorized caller"); // Store ERC721 metadata. name = edition.name; symbol = edition.symbol; // Store edition data. imageURI = edition.imageURI; contentURI = edition.contentURI; price = edition.price; limit = edition.limit; fundingRecipient = edition.fundingRecipient; renderer = edition.renderer; // Store owner. _setInitialOwner(_creator); // Store guard status. _setGuard(_guardOn); // Mint initial token to recipient if (tokenRecipient != address(0)) { _purchase(tokenRecipient, message, mintReferral); } } /// @notice Base description URI. function baseDescriptionURI() external view override returns (string memory) { return _getBaseDescriptionURI(); } /// @notice Token description. function description() public view override returns (string memory) { return string( abi.encodePacked( _getBaseDescriptionURI(), Strings.toString(block.chainid), "/", _addressToString(address(this)) ) ); } /// > [[[[[[[[[[[ View Functions ]]]]]]]]]]] /// @notice Helper function to get owners for a list of tokenIds. /// @dev Could revert if `tokenIds` is too long. /// @param tokenIds a list of token-ids to check ownership of. /// @return owners a list of token-id owners, address(0) if token is not minted function ownerOf( uint256[] memory tokenIds ) external view override returns (address[] memory owners) { owners = new address[](tokenIds.length); for (uint256 i = 0; i < tokenIds.length; i++) { owners[i] = _owners[tokenIds[i]]; } } /// > [[[[[[[[[[[ Funding Recipient ]]]]]]]]]]] /// @notice Set a new funding recipient. /// @param _fundingRecipient new funding recipient. function setFundingRecipient( address _fundingRecipient ) external override onlyOwner { // slither-disable-next-line reentrancy-no-eth IObservability(o11y).emitFundingRecipientSet( // oldFundingRecipient fundingRecipient, // newFundingRecipient _fundingRecipient ); fundingRecipient = _fundingRecipient; } /// > [[[[[[[[[[[ Price ]]]]]]]]]]] /// @notice Set a new price. /// @param _price new price. function setPrice(uint256 _price) external override onlyOwner { // slither-disable-next-line reentrancy-no-eth IObservability(o11y).emitPriceSet( // oldPrice price, // newPrice _price ); price = _price; } /// @notice Set a new base description URI. /// @param newBaseDescriptionURI new base description URI function setBaseDescriptionURI( string memory newBaseDescriptionURI ) external override onlyOwner { // slither-disable-next-line reentrancy-no-eth IObservability(o11y).emitBaseDescriptionURISet( // oldDescriptionURI _getBaseDescriptionURI(), // oldDescriptionURI newBaseDescriptionURI ); _baseDescriptionURI = newBaseDescriptionURI; } /// @notice Turn Transaction Level Reentrancy Guard on/off. function toggleGuard() external override onlyOwner { _toggleGuard(); } /// > [[[[[[[[[[[ Purchase ]]]]]]]]]]] /// @notice Purchase a token. /// @param tokenRecipient the account to receive the token. /// @param message an optional message during purchase, not stored. /// @param mintReferral the account that referred the purchase. /// @return tokenId the id of the minted token. function purchase( address tokenRecipient, string memory message, address mintReferral ) external payable override guard nonReentrant returns (uint256 tokenId) { return _purchase(tokenRecipient, message, mintReferral); } /// > [[[[[[[[[[[ Mint ]]]]]]]]]]] /// @notice Mint an edition /// @dev throws if called by a non-owner /// @param tokenRecipient the account to receive the edition function mint( address tokenRecipient ) external override onlyOwner returns (uint256 tokenId) { tokenId = _getTokenIdAndMint(tokenRecipient); } /// > [[[[[[[[[[[ Limit ]]]]]]]]]]] /// @notice Allows the owner to set a global limit on the total supply /// @dev throws if attempting to increase the limit /// @param newLimit new mint limit. function setLimit(uint256 newLimit) external override onlyOwner { // Enforce that the limit should only ever decrease once set. require( newLimit >= totalSupply && (limit == 0 || newLimit < limit), "limit must be < than current limit" ); // Announce the change in limit. // slither-disable-next-line reentrancy-no-eth IObservability(o11y).emitWritingEditionLimitSet( // oldLimit limit, // newLimit newLimit ); // Update the limit. limit = newLimit; } /// @notice Set the limit to the last minted tokenId. function setMaxLimit() external override onlyOwner { // Announce the change in limit. // slither-disable-next-line reentrancy-no-eth IObservability(o11y).emitWritingEditionLimitSet( // oldLimit limit, // newLimit totalSupply ); // Update the limit. limit = totalSupply; } /// > [[[[[[[[[[[ ERC2981 Methods ]]]]]]]]]]] /// @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 override returns (address receiver, uint256 royaltyAmount) { receiver = royaltyRecipient; royaltyAmount = (_salePrice * royaltyBPS) / 10_000; } /// @notice Get royalties information. /// @param royaltyRecipient_ the address that will receive royalties /// @param royaltyBPS_ the royalty amount in basis points (bps) function setRoyaltyInfo( address royaltyRecipient_, uint256 royaltyBPS_ ) external override onlyOwner { require( royaltyBPS_ <= 10_000, "bps must be less than or equal to 10,000" ); // slither-disable-next-line reentrancy-no-eth IObservability(o11y).emitRoyaltyChange( // oldRoyaltyRecipient royaltyRecipient, // oldRoyaltyBPS royaltyBPS, // newRoyaltyRecipient royaltyRecipient_, // newRoyaltyBPS royaltyBPS_ ); royaltyRecipient = royaltyRecipient_; royaltyBPS = royaltyBPS_; } /// > [[[[[[[[[[[ Rendering Methods ]]]]]]]]]]] /// @notice Set the renderer address /// @dev Throws if renderer is not the zero address /// @param _renderer contract responsible for rendering tokens. function setRenderer(address _renderer) external override onlyOwner { require(renderer == address(0), "renderer already set"); renderer = _renderer; IObservability(o11y).emitRendererSet( // renderer _renderer ); } /// @notice Get contract metadata /// @dev If a renderer is set, attempt return the renderer's metadata. function contractURI() external view override returns (string memory) { if (renderer != address(0)) { // slither-disable-next-line unused-return try IRenderer(renderer).contractURI() returns ( // slither-disable-next-line uninitialized-local string memory result ) { return result; } catch { // Fallback if the renderer does not implement contractURI return _generateContractURI(); } } return _generateContractURI(); } /// @notice Get `tokenId` URI or data /// @dev If a renderer is set, call renderer's tokenURI /// @param tokenId The tokenId used to request data function tokenURI( uint256 tokenId ) external view override returns (string memory) { require(_exists(tokenId), "ERC721: query for nonexistent token"); if (renderer != address(0)) { return IRenderer(renderer).tokenURI(tokenId); } // slither-disable-next-line uninitialized-local bytes memory editionNumber; if (limit != 0) { editionNumber = abi.encodePacked("/", Strings.toString(limit)); } string memory json = Base64.encode( bytes( string( abi.encodePacked( '{"name": "', _escapeQuotes(name), " ", Strings.toString(tokenId), editionNumber, '", "description": "', _escapeQuotes(description()), '", "content": "ar://', contentURI, '", "image": "ipfs://', imageURI, '", "attributes":[{ "trait_type": "Serial", "value": ', Strings.toString(tokenId), "}] }" ) ) ) ); return string(abi.encodePacked("data:application/json;base64,", json)); } /// > [[[[[[[[[[[ IERC165 Method ]]]]]]]]]]] /// @param interfaceId The interface identifier, as specified in ERC-165 function supportsInterface( bytes4 interfaceId ) public pure override returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || interfaceId == type(IERC165).interfaceId || interfaceId == type(IERC2981).interfaceId; } /// > [[[[[[[[[[[ Internal Functions ]]]]]]]]]]] function _generateContractURI() internal view returns (string memory) { string memory json = Base64.encode( bytes( string( abi.encodePacked( '{"name": "', _escapeQuotes(name), '", "description": "', _escapeQuotes(description()), '", "content": "ar://', contentURI, '", "image": "ipfs://', imageURI, '", "seller_fee_basis_points": ', Strings.toString(royaltyBPS), ', "fee_recipient": "', _addressToString(royaltyRecipient), '", "external_link": "', _getBaseDescriptionURI(), '"}' ) ) ) ); return string(abi.encodePacked("data:application/json;base64,", json)); } /// @dev Emit a transfer event from observability contract. function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override { IObservability(o11y).emitTransferEvent(from, to, tokenId); } function _purchase( address tokenRecipient, string memory message, address mintReferral ) internal returns (uint256 tokenId) { // Mint token, and get a tokenId. tokenId = _getTokenIdAndMint(tokenRecipient); // Get fee. uint256 flatFeeAmount = 0; address feeConfiguration = _getFeeConfiguration(); if ( feeConfiguration != address(0) && IFeeConfiguration(feeConfiguration).flatFeeOn() ) { // Calculate the fee on the current balance flatFeeAmount = IFeeConfiguration(feeConfiguration).flatFeeAmount(); } // Emit event through observability contract. IObservability(o11y).emitWritingEditionPurchased( // tokenId tokenId, // recipient tokenRecipient, // price price, // message message, // flatFeeAmount flatFeeAmount ); _withdraw(fundingRecipient, msg.value, flatFeeAmount, mintReferral); } function _getFeeConfiguration() internal returns (address) { return ITreasuryConfiguration(treasuryConfiguration).feeConfiguration(); } function _getTributaryRegistry() internal returns (address) { return ITreasuryConfiguration(treasuryConfiguration).tributaryRegistry(); } /// @dev Withdraws `amount` to `fundsRecipient`. Sends fee to treasury // if fees are on. function _withdraw( address fundsRecipient, uint256 amount, uint256 flatFeeAmount, address mintReferral ) internal { // If the fee is not zero, attempt to send it to the treasury. // If the treasury is not set, do not pay the fee. address treasury = ITreasuryConfiguration(treasuryConfiguration) .treasury(); if (flatFeeAmount != 0 && treasury != address(0)) { require(amount == price + flatFeeAmount, "invalid amount"); ( uint256 creatorReward, uint256 fee, uint256 mintReferralReward, uint256 firstMinterReward ) = Rewards.getRewards( mintReferral, price == 0, // free mint? flatFeeAmount ); if (firstMinter == address(0)) { // If the first minter is the creator, send them first minter reward. _sendEther( payable(fundsRecipient), price + creatorReward + firstMinterReward ); } else { _sendEther(payable(firstMinter), firstMinterReward); _sendEther(payable(fundsRecipient), price + creatorReward); } // Send fee to treasury. _sendEther(payable(treasury), fee); emit RewardsDistributed( creatorReward, fee, mintReferralReward, firstMinterReward, fundsRecipient, // creator mintReferral, firstMinter ); // Send referral reward to referral. if (mintReferralReward != 0) { _sendEther(payable(mintReferral), mintReferralReward); } } else { require(amount == price, "invalid amount"); _sendEther(payable(fundsRecipient), amount); } } function _sendEther(address payable recipient, uint256 amount) internal { // Ensure sufficient balance. require(address(this).balance >= amount, "insufficient balance"); // Send the value. // slither-disable-next-line low-level-calls (bool success, ) = recipient.call{value: amount, gas: gasleft()}(""); require(success, "recipient reverted"); } /// @dev Mints and returns tokenId function _getTokenIdAndMint( address tokenRecipient ) internal returns (uint256 tokenId) { // Increment totalSupply to get next id and store tokenId. tokenId = ++totalSupply; // check that there are still tokens available to purchase // zero and max uint256 represent infinite minting require( limit == 0 || limit == type(uint256).max || tokenId < limit + 1, "sold out" ); // mint a new token for the tokenRecipient, using the `tokenId`. _mint(tokenRecipient, tokenId); } function _getBaseDescriptionURI() internal view returns (string memory) { return bytes(_baseDescriptionURI).length == 0 ? IWritingEditionsFactory(factory).baseDescriptionURI() : _baseDescriptionURI; } // https://ethereum.stackexchange.com/questions/8346/convert-address-to-string/8447#8447 function _addressToString(address x) internal pure returns (string memory) { bytes memory s = new bytes(40); for (uint256 i = 0; i < 20; i++) { bytes1 b = bytes1( uint8(uint256(uint160(x)) / (2 ** (8 * (19 - i)))) ); bytes1 hi = bytes1(uint8(b) / 16); bytes1 lo = bytes1(uint8(b) - 16 * uint8(hi)); s[2 * i] = _char(hi); s[2 * i + 1] = _char(lo); } return string(abi.encodePacked("0x", s)); } function _char(bytes1 b) internal pure returns (bytes1 c) { if (uint8(b) < 10) return bytes1(uint8(b) + 0x30); else return bytes1(uint8(b) + 0x57); } function _escapeQuotes( string memory str ) internal pure returns (string memory) { bytes memory strBytes = bytes(str); uint8 quotesCount = 0; for (uint8 i = 0; i < strBytes.length; i++) { if (strBytes[i] == '"') { quotesCount++; } } if (quotesCount > 0) { bytes memory escapedBytes = new bytes( strBytes.length + (quotesCount) ); uint256 index; for (uint8 i = 0; i < strBytes.length; i++) { if (strBytes[i] == '"') { escapedBytes[index++] = "\\"; } escapedBytes[index++] = strBytes[i]; } return string(escapedBytes); } return str; } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; interface IWritingEditionEvents { event RoyaltyChange( address indexed oldRoyaltyRecipient, uint256 oldRoyaltyBPS, address indexed newRoyaltyRecipient, uint256 newRoyaltyBPS ); event RendererSet(address indexed renderer); event WritingEditionLimitSet(uint256 oldLimit, uint256 newLimit); event PriceSet(uint256 price); event RewardsDistributed( uint256 creatorReward, uint256 fee, uint256 mintReferralReward, uint256 firstMinterReward, address creator, address mintReferral, address firstMinter ); } interface IWritingEditions { struct WritingEdition { string name; string symbol; string description; string imageURI; string contentURI; uint256 price; uint256 limit; address fundingRecipient; address renderer; uint256 nonce; } function VERSION() external view returns (uint8); function factory() external returns (address); function treasuryConfiguration() external returns (address); function o11y() external returns (address); function baseDescriptionURI() external view returns (string memory); function description() external view returns (string memory); function totalSupply() external view returns (uint256); function price() external view returns (uint256); function limit() external view returns (uint256); function contentURI() external view returns (string memory); function imageURI() external view returns (string memory); function fundingRecipient() external returns (address); function royaltyRecipient() external returns (address); function royaltyBPS() external returns (uint256); function renderer() external view returns (address); function firstMinter() external view returns (address); function ownerOf( uint256[] memory tokenIds ) external view returns (address[] memory owners); function initializeWithSignature( address _creator, bytes32 structHash, bytes calldata signature, WritingEdition memory edition, address tokenRecipient, string memory message, address mintReferral, bool _guardOn, address sender ) external payable; function initialize( address _creator, WritingEdition memory edition, address recipient, string memory message, address mintReferral, bool _guard ) external payable; function setFundingRecipient(address fundingRecipient_) external; function setPrice(uint256 price_) external; function setBaseDescriptionURI(string memory _baseDescriptionURI) external; function setLimit(uint256 limit_) external; function setMaxLimit() external; function setRoyaltyInfo( address royaltyRecipient_, uint256 royaltyPercentage_ ) external; function toggleGuard() external; function purchase( address tokenRecipient, string memory message, address mintReferral ) external payable returns (uint256 tokenId); function mint(address tokenRecipient) external returns (uint256 tokenId); function setRenderer(address renderer_) external; function contractURI() external view returns (string memory); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; /// > [[[[[[[[[[[ Imports ]]]]]]]]]]] import "./IWritingEditions.sol"; interface IWritingEditionsFactoryEvents { event NewImplementation( address indexed oldImplementation, address indexed newImplementation ); event EditionsDeployed( address indexed owner, address indexed clone, address indexed implementation ); } interface IWritingEditionsFactory { function VERSION() external view returns (uint8); function implementation() external view returns (address); function o11y() external view returns (address); function treasuryConfiguration() external view returns (address); function guardOn() external view returns (bool); function salts(bytes32 salt) external view returns (bool); function maxLimit() external view returns (uint256); function baseDescriptionURI() external view returns (string memory); function predictDeterministicAddress( address implementation_, bytes32 salt ) external view returns (address); function setLimit(uint256 _maxLimit) external; function setGuard(bool _guardOn) external; function setImplementation(address _implementation) external; function create( IWritingEditions.WritingEdition memory edition_ ) external returns (address clone); function createWithSignature( address owner_, IWritingEditions.WritingEdition memory edition_, uint8 v, bytes32 r, bytes32 s, address recipient, string memory message, address mintReferral ) external payable returns (address clone); function setTributary(address clone, address _tributary) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "openzeppelin-contracts/contracts/utils/cryptography/EIP712.sol"; import "openzeppelin-contracts/contracts/utils/cryptography/ECDSA.sol"; import "openzeppelin-contracts/contracts/interfaces/IERC1271.sol"; import "solady/utils/LibString.sol"; /// @notice ERC-7015: NFT Creator Attribution /// @notice https://eips.ethereum.org/EIPS/eip-7015 /// @author indreams.eth abstract contract ERC7015 is EIP712 { error InvalidCreatorAttributionSignature(); error NameAndVersionTooLong(); error InvalidCreator(); event CreatorAttribution( bytes32 structHash, string domainName, string version, address creator, bytes signature ); /// @notice Define magic value to verify smart contract signatures (ERC1271). bytes4 internal constant MAGIC_VALUE = bytes4(keccak256("isValidSignature(bytes32,bytes)")); bytes32 public constant TYPEHASH = keccak256("TokenCreation(bytes32 structHash)"); bytes32 public immutable packedDomainNameAndVersion; constructor( string memory name, string memory version ) EIP712(name, version) { packedDomainNameAndVersion = LibString.packTwo(name, version); if (packedDomainNameAndVersion == bytes32(0)) revert NameAndVersionTooLong(); } function _validateSignature( address creator, bytes32 structHash, bytes calldata signature ) internal { if (!_isValid(structHash, creator, signature)) revert InvalidCreatorAttributionSignature(); (string memory _domainName, string memory _domainVersion) = LibString .unpackTwo(packedDomainNameAndVersion); emit CreatorAttribution( structHash, _domainName, _domainVersion, creator, signature ); } function _isValid( bytes32 structHash, address signer, bytes calldata signature ) internal view returns (bool) { if (signer == address(0)) revert InvalidCreator(); bytes32 digest = _hashTypedDataV4( keccak256(abi.encode(TYPEHASH, structHash)) ); // If the signer is a contract, attempt to validate the // signature using EIP-1271. if (signer.code.length != 0) { // slither-disable-next-line unused-return try IERC1271(signer).isValidSignature(digest, signature) returns ( // slither-disable-next-line uninitialized-local bytes4 magicValue ) { return MAGIC_VALUE == magicValue; } catch { return false; } } address recoveredSigner = ECDSA.recover(digest, signature); return recoveredSigner == signer; } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; interface IObservabilityEvents { /// > [[[[[[[[[[[ Factory events ]]]]]]]]]]] event CloneDeployed( address indexed factory, address indexed owner, address indexed clone ); event TributarySet( address indexed factory, address indexed clone, address oldTributary, address indexed newTributary ); event FactoryLimitSet( address indexed factory, uint256 oldLimit, uint256 newLimit ); event FactoryGuardSet(bool guard); event FactoryImplementationSet( address indexed factory, address indexed oldImplementation, address indexed newImplementation ); /// > [[[[[[[[[[[ Clone events ]]]]]]]]]]] event WritingEditionPurchased( address indexed clone, uint256 tokenId, address indexed recipient, uint256 price, string message, uint256 flatFeeAmount ); event Transfer( address indexed clone, address indexed from, address indexed to, uint256 tokenId ); event RoyaltyChange( address indexed clone, address indexed oldRoyaltyRecipient, uint256 oldRoyaltyBPS, address indexed newRoyaltyRecipient, uint256 newRoyaltyBPS ); event RendererSet(address indexed clone, address indexed renderer); event WritingEditionLimitSet( address indexed clone, uint256 oldLimit, uint256 newLimit ); event PriceSet(address indexed clone, uint256 oldLimit, uint256 newLimit); event FundingRecipientSet( address indexed clone, address indexed oldFundingRecipient, address indexed newFundingRecipient ); event BaseDescriptionURISet( address indexed clone, string oldBaseDescriptionURI, string newBaseDescriptionURI ); } interface IObservability { function emitDeploymentEvent(address owner, address clone) external; function emitTributarySet( address clone, address oldTributary, address newTributary ) external; function emitFactoryGuardSet(bool guard) external; function emitFactoryImplementationSet( address oldImplementation, address newImplementation ) external; function emitFactoryLimitSet(uint256 oldLimit, uint256 newLimit) external; function emitTransferEvent( address from, address to, uint256 tokenId ) external; function emitWritingEditionPurchased( uint256 tokenId, address recipient, uint256 price, string memory message, uint256 flatFeeAmount ) external; function emitRoyaltyChange( address oldRoyaltyRecipient, uint256 oldRoyaltyBPS, address newRoyaltyRecipient, uint256 newRoyaltyBPS ) external; function emitRendererSet(address renderer) external; function emitWritingEditionLimitSet( uint256 oldLimit, uint256 newLimit ) external; function emitFundingRecipientSet( address oldFundingRecipient, address newFundingRecipient ) external; function emitPriceSet(uint256 oldPrice, uint256 newPrice) external; function emitBaseDescriptionURISet( string memory oldBaseDescriptionURI, string memory newBaseDescriptionURI ) external; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; interface IFeeConfigurationEvents { event FeeSwitch(bool on); event FlatFeeSwitch(bool on); event MinimumFee(uint16 fee); event MaximumFee(uint16 fee); event FlatFeeAmount(uint256 fee); } interface IFeeConfiguration { function on() external returns (bool); function flatFeeOn() external returns (bool); function flatFeeAmount() external returns (uint256); function maximumFee() external returns (uint16); function minimumFee() external returns (uint16); function switchFee() external; function setMinimumFee(uint16 newFee) external; function setMaximumFee(uint16 newFe) external; function valid(uint16 feeBPS) external view returns (bool); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; interface IRenderer { function tokenURI(uint256 tokenId) external view returns (string calldata); function contractURI() external view returns (string calldata); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; /** * @title Rewards * @notice Calculates rewards for free and paid mints */ library Rewards { error FeeTooLowError(); /// @notice 40% creator reward for free mint uint256 constant _FREE_CREATOR_REWARD_PERCENTAGE = 40_00; /// @notice 10% mint referral reward for free mint uint256 constant _FREE_MINT_REFERRAL_REWARD_PERCENTAGE = 10_00; /// @notice 30% fee for free mint uint256 constant _FREE_FEE_PERCENTAGE = 30_00; /// @notice 20% first minter reward for free mint uint256 constant _FREE_FIRST_MINTER_REWARD_PECENTAGE = 20_00; /// @notice 25% creator referral reward for paid mint uint256 constant _PAID_MINT_REFERRAL_REWARD_PERCENTAGE = 25_00; /// @notice 50% mint referral reward for paid mint uint256 constant _PAID_FEE_PERCENTAGE = 50_00; /// @notice 25% fee for paid mint uint256 constant _PAID_FIRST_MINTER_REWARD_PERCENTAGE = 25_00; function getRewards( address mintReferral, bool freeMint, uint256 flatFeeAmount ) external pure returns (uint256, uint256, uint256, uint256) { if (flatFeeAmount < 10) revert FeeTooLowError(); if (freeMint) { return _getFreeMintRewards(mintReferral, flatFeeAmount); } return _getPaidMintRewards(mintReferral, flatFeeAmount); } function _getFreeMintRewards( address mintReferral, uint256 flatFeeAmount ) internal pure returns (uint256, uint256, uint256, uint256) { uint256 mintReferralReward = 0; uint256 creatorReward = (flatFeeAmount * _FREE_CREATOR_REWARD_PERCENTAGE) / 100_00; uint256 firstMinterReward = (flatFeeAmount * _FREE_FIRST_MINTER_REWARD_PECENTAGE) / 100_00; uint256 fee = (flatFeeAmount * _FREE_FEE_PERCENTAGE) / 100_00; if (mintReferral != address(0)) mintReferralReward = (flatFeeAmount * _FREE_MINT_REFERRAL_REWARD_PERCENTAGE) / 100_00; else fee += (flatFeeAmount * _FREE_MINT_REFERRAL_REWARD_PERCENTAGE) / 100_00; return (creatorReward, fee, mintReferralReward, firstMinterReward); } function _getPaidMintRewards( address mintReferral, uint256 flatFeeAmount ) internal pure returns (uint256, uint256, uint256, uint256) { uint256 mintReferralReward = 0; uint256 fee = (flatFeeAmount * _PAID_FEE_PERCENTAGE) / 100_00; uint256 firstMinterReward = (flatFeeAmount * _PAID_FIRST_MINTER_REWARD_PERCENTAGE) / 100_00; if (mintReferral != address(0)) mintReferralReward = (flatFeeAmount * _PAID_MINT_REFERRAL_REWARD_PERCENTAGE) / 100_00; else fee += (flatFeeAmount * _PAID_MINT_REFERRAL_REWARD_PERCENTAGE) / 100_00; return (0, fee, mintReferralReward, firstMinterReward); } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; interface ITreasuryConfigurationEvents { event TreasurySet(address indexed treasury, address indexed newTreasury); event TributaryRegistrySet( address indexed tributaryRegistry, address indexed newTributaryRegistry ); event DistributionSet( address indexed distribution, address indexed newDistribution ); event FeeConfigurationSet( address indexed feeConfiguration, address indexed newFeeConfiguration ); } interface ITreasuryConfiguration { function treasury() external returns (address payable); function tributaryRegistry() external returns (address); function distribution() external returns (address); function feeConfiguration() external returns (address); function setTreasury(address payable newTreasury) external; function setTributaryRegistry(address newTributaryRegistry) external; function setDistribution(address newDistribution) external; function setFeeConfiguration(address newFeeConfiguration) external; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; interface ITreasuryEvents { event Transfer(address indexed from, address indexed to, uint256 value); event ERC20Transfer( address indexed token, address indexed from, address indexed to, uint256 amount ); event ERC721Transfer( address indexed token, address indexed from, address indexed to, uint256 tokenId ); } interface ITreasury { struct Call { // The target of the transaction. address target; // The value passed into the transaction. uint96 value; // Any data passed with the call. bytes data; } function treasuryConfiguration() external view returns (address); function transferFunds(address payable to, uint256 value) external; function transferERC20( address token, address to, uint256 value ) external; function transferERC721( address token, address from, address to, uint256 tokenId ) external; function contributeWithTributary(address tributary) external payable; function contribute(uint256 amount) external payable; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; interface ITributaryRegistry { function allowedRegistrar(address account) external view returns (bool); function producerToTributary(address producer) external view returns (address tributary); function singletonProducer(address producer) external view returns (bool); function addRegistrar(address registrar) external; function removeRegistrar(address registrar) external; function addSingletonProducer(address producer) external; function removeSingletonProducer(address producer) external; function setTributary(address producer, address newTributary) external; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; interface IOwnableEvents { event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); } interface IOwnable { function transferOwnership(address nextOwner_) external; function cancelOwnershipTransfer() external; function acceptOwnership() external; function renounceOwnership() external; function isOwner() external view returns (bool); function isNextOwner() external view returns (bool); } contract Ownable is IOwnable, IOwnableEvents { address public owner; address private nextOwner; /// > [[[[[[[[[[[ Modifiers ]]]]]]]]]]] modifier onlyOwner() { require(isOwner(), "caller is not the owner."); _; } modifier onlyNextOwner() { require(isNextOwner(), "current owner must set caller as next owner."); _; } /// @notice Initialize contract by setting the initial owner. constructor(address owner_) { _setInitialOwner(owner_); } /// @notice Initiate ownership transfer by setting nextOwner. function transferOwnership(address nextOwner_) external override onlyOwner { require(nextOwner_ != address(0), "Next owner is the zero address."); nextOwner = nextOwner_; } /// @notice Cancel ownership transfer by deleting nextOwner. function cancelOwnershipTransfer() external override onlyOwner { delete nextOwner; } /// @notice Accepts ownership transfer by setting owner. function acceptOwnership() external override onlyNextOwner { delete nextOwner; owner = msg.sender; emit OwnershipTransferred(owner, msg.sender); } /// @notice Renounce ownership by setting owner to zero address. function renounceOwnership() external override onlyOwner { _renounceOwnership(); } /// @notice Returns true if the caller is the current owner. function isOwner() public view override returns (bool) { return msg.sender == owner; } /// @notice Returns true if the caller is the next owner. function isNextOwner() public view override returns (bool) { return msg.sender == nextOwner; } /// > [[[[[[[[[[[ Internal Functions ]]]]]]]]]]] function _setOwner(address previousOwner, address newOwner) internal { owner = newOwner; emit OwnershipTransferred(previousOwner, owner); } function _setInitialOwner(address newOwner) internal { owner = newOwner; emit OwnershipTransferred(address(0), newOwner); } function _renounceOwnership() internal { emit OwnershipTransferred(owner, address(0)); owner = address(0); } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; import "./interface/IERC721.sol"; import "../ERC165/ERC165.sol"; /** * Based on: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/ERC721.sol */ contract ERC721 is ERC165, IERC721, IERC721Events { mapping(uint256 => address) internal _owners; mapping(address => uint256) internal _balances; mapping(uint256 => address) private _tokenApprovals; mapping(address => mapping(address => bool)) private _operatorApprovals; function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } function balanceOf(address owner) external view virtual override returns (uint256) { require( owner != address(0), "ERC721: balance query for the zero address" ); return _balances[owner]; } function ownerOf(uint256 tokenId) external view virtual returns (address) { return _ownerOf(tokenId); } function _ownerOf(uint256 tokenId) internal view returns (address) { address owner = _owners[tokenId]; require( owner != address(0), "ERC721: owner query for nonexistent token" ); return owner; } function approve(address to, uint256 tokenId) external virtual override { address owner = _ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( msg.sender == owner || isApprovedForAll(owner, msg.sender), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } function getApproved(uint256 tokenId) public view virtual override returns (address) { require( _exists(tokenId), "ERC721: approved query for nonexistent token" ); return _tokenApprovals[tokenId]; } function setApprovalForAll(address operator, bool approved) external virtual override { require(operator != msg.sender, "ERC721: approve to caller"); _operatorApprovals[msg.sender][operator] = approved; emit ApprovalForAll(msg.sender, operator, approved); } function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } function transferFrom( address from, address to, uint256 tokenId ) external virtual override { //solhint-disable-next-line max-line-length require( _isApprovedOrOwner(msg.sender, tokenId), "ERC721: transfer caller is not owner nor approved" ); _transfer(from, to, tokenId); } function safeTransferFrom( address from, address to, uint256 tokenId ) external virtual override { _safeTransferFrom(from, to, tokenId, ""); } function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) external virtual override { _safeTransferFrom(from, to, tokenId, _data); } function _safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { require( _isApprovedOrOwner(msg.sender, tokenId), "ERC721: transfer caller is not owner nor approved" ); _safeTransfer(from, to, tokenId, _data); } function _safeTransfer( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require( _checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require( _exists(tokenId), "ERC721: operator query for nonexistent token" ); address owner = _ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } function _safeMint( address to, uint256 tokenId, bytes memory _data ) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); } function _burn(uint256 tokenId) internal virtual { address owner = _ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); } function _transfer( address from, address to, uint256 tokenId ) internal virtual { require( _ownerOf(tokenId) == from, "ERC721: transfer of token that is not own" ); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); } function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(_ownerOf(tokenId), to, tokenId); } function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.code.length > 0) { // slither-disable-next-line unused-return try IERC721Receiver(to).onERC721Received( msg.sender, from, tokenId, _data ) returns (bytes4 retval) { return retval == IERC721Receiver(to).onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert( "ERC721: transfer to non ERC721Receiver implementer" ); } else { // solhint-disable-next-line no-inline-assembly assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; interface IERC165 { function supportsInterface(bytes4 interfaceId) external view returns (bool); } abstract contract ERC165 is IERC165 { function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; interface IERC721 { function balanceOf(address owner) external view returns (uint256 balance); function ownerOf(uint256 tokenId) external view returns (address owner); function safeTransferFrom( address from, address to, uint256 tokenId ) external; function transferFrom( address from, address to, uint256 tokenId ) external; function approve(address to, uint256 tokenId) external; function getApproved(uint256 tokenId) external view returns (address operator); function setApprovalForAll(address operator, bool _approved) external; function isApprovedForAll(address owner, address operator) external view returns (bool); function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; } interface IERC721Events { event Transfer( address indexed from, address indexed to, uint256 indexed tokenId ); event Approval( address indexed owner, address indexed approved, uint256 indexed tokenId ); event ApprovalForAll( address indexed owner, address indexed operator, bool approved ); } interface IERC721Metadata { function name() external view returns (string memory); function symbol() external view returns (string memory); function tokenURI(uint256 tokenId) external view returns (string memory); } interface IERC721Burnable is IERC721 { function burn(uint256 tokenId) external; } interface IERC721Receiver { function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } interface IERC721Royalties { function getFeeRecipients(uint256 id) external view returns (address payable[] memory); function getFeeBps(uint256 id) external view returns (uint256[] memory); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; /** * @title IERC2981 * @notice Interface for the NFT Royalty Standard */ interface IERC2981 { // / bytes4(keccak256("royaltyInfo(uint256,uint256)")) == 0x2a55205a /** * @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: GPL-3.0-or-later pragma solidity ^0.8.0; /** * @title TransactionReentrancyGuard * @notice Transaction level reentrancy guard, used to prevent calling a * function multiple times in the same transaction, e.g. minting a token * using a multicall contract. The guard accesses a storage variable twice * and compares the gas used, taking advantage of EIP-2929 cold/warm storage * read costs. * * From EIP-2929: Gas cost increases for state access opcodes: * "For SLOAD, if the (address, storage_key) pair (where address * is the address of the contract whose storage is being read) is not yet * in accessed_storage_keys, charge COLD_SLOAD_COST gas and add the pair * to accessed_storage_keys. If the pair is already in accessed_storage_keys, * charge WARM_STORAGE_READ_COST gas." * * Implementation was forked from bertani.eth, after a thread involving these * anon solidity giga-brains: [at]rage_pit, [at]transmissions11, 0age.eth. */ contract TransactionReentrancyGuard { bool public guardOn; uint256 internal GUARD = 1; /// > [[[[[[[[[[[ Modifiers ]]]]]]]]]]] modifier guard() { // If guard is on, run guard. if (guardOn) { _guard(); } _; } constructor(bool _guardOn) { _setGuard(_guardOn); } function _guard() internal view { // Store current gas left. uint256 t0 = gasleft(); // Load GUARD from storage. uint256 g = GUARD; // Store current gas left. uint256 t1 = gasleft(); // Load GUARD from storage. uint256 m = GUARD; // Assert the cost of acessing `g` is greater than the // cost of accessing `m`, which implies the first SLOAD // was charged COLD_SLOAD_COST and the second SLOAD was // charged WARM_STORAGE_READ_COST. Hence this is the first // time the function has been called. require(t1 - gasleft() < t0 - t1); } function _toggleGuard() internal { _setGuard(!guardOn); } function _setGuard(bool _guardOn) internal { guardOn = _guardOn; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be _NOT_ENTERED require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { return _status == _ENTERED; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Base64.sol) pragma solidity ^0.8.0; /** * @dev Provides a set of functions to operate with Base64 strings. * * _Available since v4.5._ */ library Base64 { /** * @dev Base64 Encoding/Decoding Table */ string internal constant _TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; /** * @dev Converts a `bytes` to its Bytes64 `string` representation. */ function encode(bytes memory data) internal pure returns (string memory) { /** * Inspired by Brecht Devos (Brechtpd) implementation - MIT licence * https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol */ if (data.length == 0) return ""; // Loads the table into memory string memory table = _TABLE; // Encoding takes 3 bytes chunks of binary data from `bytes` data parameter // and split into 4 numbers of 6 bits. // The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up // - `data.length + 2` -> Round up // - `/ 3` -> Number of 3-bytes chunks // - `4 *` -> 4 characters for each chunk string memory result = new string(4 * ((data.length + 2) / 3)); /// @solidity memory-safe-assembly assembly { // Prepare the lookup table (skip the first "length" byte) let tablePtr := add(table, 1) // Prepare result pointer, jump over length let resultPtr := add(result, 32) // Run over the input, 3 bytes at a time for { let dataPtr := data let endPtr := add(data, mload(data)) } lt(dataPtr, endPtr) { } { // Advance 3 bytes dataPtr := add(dataPtr, 3) let input := mload(dataPtr) // To write each character, shift the 3 bytes (18 bits) chunk // 4 times in blocks of 6 bits for each character (18, 12, 6, 0) // and apply logical AND with 0x3F which is the number of // the previous character in the ASCII table prior to the Base64 Table // The result is then added to the table to get the character to write, // and finally write it in the result pointer but with a left shift // of 256 (1 byte) - 8 (1 ASCII char) = 248 bits mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F)))) resultPtr := add(resultPtr, 1) // Advance mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F)))) resultPtr := add(resultPtr, 1) // Advance mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F)))) resultPtr := add(resultPtr, 1) // Advance mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F)))) resultPtr := add(resultPtr, 1) // Advance } // When data `bytes` is not exactly 3 bytes long // it is padded with `=` characters at the end switch mod(mload(data), 3) case 1 { mstore8(sub(resultPtr, 1), 0x3d) mstore8(sub(resultPtr, 2), 0x3d) } case 2 { mstore8(sub(resultPtr, 1), 0x3d) } } return result; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; import "./math/SignedMath.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _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) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toString(int256 value) internal pure returns (string memory) { return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value)))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @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] = _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); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return keccak256(bytes(a)) == keccak256(bytes(b)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/EIP712.sol) pragma solidity ^0.8.8; import "./ECDSA.sol"; import "../ShortStrings.sol"; import "../../interfaces/IERC5267.sol"; /** * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data. * * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible, * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding * they need in their contracts using a combination of `abi.encode` and `keccak256`. * * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA * ({_hashTypedDataV4}). * * The implementation of the domain separator was designed to be as efficient as possible while still properly updating * the chain id to protect against replay attacks on an eventual fork of the chain. * * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. * * NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain * separator of the implementation contract. This will cause the `_domainSeparatorV4` function to always rebuild the * separator from the immutable values, which is cheaper than accessing a cached version in cold storage. * * _Available since v3.4._ * * @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment */ abstract contract EIP712 is IERC5267 { using ShortStrings for *; bytes32 private constant _TYPE_HASH = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"); // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to // invalidate the cached domain separator if the chain id changes. bytes32 private immutable _cachedDomainSeparator; uint256 private immutable _cachedChainId; address private immutable _cachedThis; bytes32 private immutable _hashedName; bytes32 private immutable _hashedVersion; ShortString private immutable _name; ShortString private immutable _version; string private _nameFallback; string private _versionFallback; /** * @dev Initializes the domain separator and parameter caches. * * The meaning of `name` and `version` is specified in * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]: * * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. * - `version`: the current major version of the signing domain. * * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart * contract upgrade]. */ constructor(string memory name, string memory version) { _name = name.toShortStringWithFallback(_nameFallback); _version = version.toShortStringWithFallback(_versionFallback); _hashedName = keccak256(bytes(name)); _hashedVersion = keccak256(bytes(version)); _cachedChainId = block.chainid; _cachedDomainSeparator = _buildDomainSeparator(); _cachedThis = address(this); } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { if (address(this) == _cachedThis && block.chainid == _cachedChainId) { return _cachedDomainSeparator; } else { return _buildDomainSeparator(); } } function _buildDomainSeparator() private view returns (bytes32) { return keccak256(abi.encode(_TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this))); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash); } /** * @dev See {EIP-5267}. * * _Available since v4.9._ */ function eip712Domain() public view virtual override returns ( bytes1 fields, string memory name, string memory version, uint256 chainId, address verifyingContract, bytes32 salt, uint256[] memory extensions ) { return ( hex"0f", // 01111 _name.toStringWithFallback(_nameFallback), _version.toStringWithFallback(_versionFallback), block.chainid, address(this), bytes32(0), new uint256[](0) ); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (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 ∈ {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 message) { // 32 is the length in bytes of hash, // enforced by the type signature above /// @solidity memory-safe-assembly assembly { mstore(0x00, "\x19Ethereum Signed Message:\n32") mstore(0x1c, hash) message := keccak256(0x00, 0x3c) } } /** * @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 data) { /// @solidity memory-safe-assembly assembly { let ptr := mload(0x40) mstore(ptr, "\x19\x01") mstore(add(ptr, 0x02), domainSeparator) mstore(add(ptr, 0x22), structHash) data := keccak256(ptr, 0x42) } } /** * @dev Returns an Ethereum Signed Data with intended validator, created from a * `validator` and `data` according to the version 0 of EIP-191. * * See {recover}. */ function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x00", validator, data)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC1271 standard signature validation method for * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271]. * * _Available since v4.1._ */ interface IERC1271 { /** * @dev Should return whether the signature provided is valid for the provided data * @param hash Hash of the data to be signed * @param signature Signature byte array associated with _data */ function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @notice Library for converting numbers into strings and other string operations. /// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/LibString.sol) /// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/LibString.sol) library LibString { /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* CUSTOM ERRORS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev The `length` of the output is too small to contain all the hex digits. error HexLengthInsufficient(); /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* CONSTANTS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev The constant returned when the `search` is not found in the string. uint256 internal constant NOT_FOUND = type(uint256).max; /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* DECIMAL OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns the base 10 decimal representation of `value`. function toString(uint256 value) internal pure returns (string memory str) { /// @solidity memory-safe-assembly 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. str := add(mload(0x40), 0x80) // Update the free memory pointer to allocate. mstore(0x40, add(str, 0x20)) // Zeroize the slot after the string. mstore(str, 0) // Cache the end of the memory to calculate the length later. let end := str let w := not(0) // Tsk. // We write the string from rightmost digit to leftmost digit. // The following is essentially a do-while loop that also handles the zero case. for { let temp := value } 1 {} { str := add(str, w) // `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) 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) } } /// @dev Returns the base 10 decimal representation of `value`. function toString(int256 value) internal pure returns (string memory str) { if (value >= 0) { return toString(uint256(value)); } unchecked { str = toString(uint256(-value)); } /// @solidity memory-safe-assembly assembly { // We still have some spare memory space on the left, // as we have allocated 3 words (96 bytes) for up to 78 digits. let length := mload(str) // Load the string length. mstore(str, 0x2d) // Store the '-' character. str := sub(str, 1) // Move back the string pointer by a byte. mstore(str, add(length, 1)) // Update the string length. } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* HEXADECIMAL OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns the hexadecimal representation of `value`, /// left-padded to an input length of `length` bytes. /// The output is prefixed with "0x" encoded using 2 hexadecimal digits per byte, /// giving a total length of `length * 2 + 2` bytes. /// Reverts if `length` is too small for the output to contain all the digits. function toHexString(uint256 value, uint256 length) internal pure returns (string memory str) { str = toHexStringNoPrefix(value, length); /// @solidity memory-safe-assembly assembly { let strLength := add(mload(str), 2) // Compute the length. mstore(str, 0x3078) // Write the "0x" prefix. str := sub(str, 2) // Move the pointer. mstore(str, strLength) // Write the length. } } /// @dev Returns the hexadecimal representation of `value`, /// left-padded to an input length of `length` bytes. /// The output is prefixed with "0x" encoded using 2 hexadecimal digits per byte, /// giving a total length of `length * 2` bytes. /// Reverts if `length` is too small for the output to contain all the digits. function toHexStringNoPrefix(uint256 value, uint256 length) internal pure returns (string memory str) { /// @solidity memory-safe-assembly assembly { // We need 0x20 bytes for the trailing zeros padding, `length * 2` bytes // for the digits, 0x02 bytes for the prefix, and 0x20 bytes for the length. // We add 0x20 to the total and round down to a multiple of 0x20. // (0x20 + 0x20 + 0x02 + 0x20) = 0x62. str := add(mload(0x40), and(add(shl(1, length), 0x42), not(0x1f))) // Allocate the memory. mstore(0x40, add(str, 0x20)) // Zeroize the slot after the string. mstore(str, 0) // Cache the end to calculate the length later. let end := str // Store "0123456789abcdef" in scratch space. mstore(0x0f, 0x30313233343536373839616263646566) let start := sub(str, add(length, length)) let w := not(1) // Tsk. let temp := value // We write the string from rightmost digit to leftmost digit. // The following is essentially a do-while loop that also handles the zero case. for {} 1 {} { str := add(str, w) // `sub(str, 2)`. mstore8(add(str, 1), mload(and(temp, 15))) mstore8(str, mload(and(shr(4, temp), 15))) temp := shr(8, temp) if iszero(xor(str, start)) { break } } if temp { // Store the function selector of `HexLengthInsufficient()`. mstore(0x00, 0x2194895a) // Revert with (offset, size). revert(0x1c, 0x04) } // Compute the string's length. let strLength := sub(end, str) // Move the pointer and write the length. str := sub(str, 0x20) mstore(str, strLength) } } /// @dev Returns the hexadecimal representation of `value`. /// The output is prefixed with "0x" and encoded using 2 hexadecimal digits per byte. /// As address are 20 bytes long, the output will left-padded to have /// a length of `20 * 2 + 2` bytes. function toHexString(uint256 value) internal pure returns (string memory str) { str = toHexStringNoPrefix(value); /// @solidity memory-safe-assembly assembly { let strLength := add(mload(str), 2) // Compute the length. mstore(str, 0x3078) // Write the "0x" prefix. str := sub(str, 2) // Move the pointer. mstore(str, strLength) // Write the length. } } /// @dev Returns the hexadecimal representation of `value`. /// The output is prefixed with "0x". /// The output excludes leading "0" from the `toHexString` output. /// `0x00: "0x0", 0x01: "0x1", 0x12: "0x12", 0x123: "0x123"`. function toMinimalHexString(uint256 value) internal pure returns (string memory str) { str = toHexStringNoPrefix(value); /// @solidity memory-safe-assembly assembly { let o := eq(byte(0, mload(add(str, 0x20))), 0x30) // Whether leading zero is present. let strLength := add(mload(str), 2) // Compute the length. mstore(add(str, o), 0x3078) // Write the "0x" prefix, accounting for leading zero. str := sub(add(str, o), 2) // Move the pointer, accounting for leading zero. mstore(str, sub(strLength, o)) // Write the length, accounting for leading zero. } } /// @dev Returns the hexadecimal representation of `value`. /// The output excludes leading "0" from the `toHexStringNoPrefix` output. /// `0x00: "0", 0x01: "1", 0x12: "12", 0x123: "123"`. function toMinimalHexStringNoPrefix(uint256 value) internal pure returns (string memory str) { str = toHexStringNoPrefix(value); /// @solidity memory-safe-assembly assembly { let o := eq(byte(0, mload(add(str, 0x20))), 0x30) // Whether leading zero is present. let strLength := mload(str) // Get the length. str := add(str, o) // Move the pointer, accounting for leading zero. mstore(str, sub(strLength, o)) // Write the length, accounting for leading zero. } } /// @dev Returns the hexadecimal representation of `value`. /// The output is encoded using 2 hexadecimal digits per byte. /// As address are 20 bytes long, the output will left-padded to have /// a length of `20 * 2` bytes. function toHexStringNoPrefix(uint256 value) internal pure returns (string memory str) { /// @solidity memory-safe-assembly assembly { // We need 0x20 bytes for the trailing zeros padding, 0x20 bytes for the length, // 0x02 bytes for the prefix, and 0x40 bytes for the digits. // The next multiple of 0x20 above (0x20 + 0x20 + 0x02 + 0x40) is 0xa0. str := add(mload(0x40), 0x80) // Allocate the memory. mstore(0x40, add(str, 0x20)) // Zeroize the slot after the string. mstore(str, 0) // Cache the end to calculate the length later. let end := str // Store "0123456789abcdef" in scratch space. mstore(0x0f, 0x30313233343536373839616263646566) let w := not(1) // Tsk. // We write the string from rightmost digit to leftmost digit. // The following is essentially a do-while loop that also handles the zero case. for { let temp := value } 1 {} { str := add(str, w) // `sub(str, 2)`. mstore8(add(str, 1), mload(and(temp, 15))) mstore8(str, mload(and(shr(4, temp), 15))) temp := shr(8, temp) if iszero(temp) { break } } // Compute the string's length. let strLength := sub(end, str) // Move the pointer and write the length. str := sub(str, 0x20) mstore(str, strLength) } } /// @dev Returns the hexadecimal representation of `value`. /// The output is prefixed with "0x", encoded using 2 hexadecimal digits per byte, /// and the alphabets are capitalized conditionally according to /// https://eips.ethereum.org/EIPS/eip-55 function toHexStringChecksummed(address value) internal pure returns (string memory str) { str = toHexString(value); /// @solidity memory-safe-assembly assembly { let mask := shl(6, div(not(0), 255)) // `0b010000000100000000 ...` let o := add(str, 0x22) let hashed := and(keccak256(o, 40), mul(34, mask)) // `0b10001000 ... ` let t := shl(240, 136) // `0b10001000 << 240` for { let i := 0 } 1 {} { mstore(add(i, i), mul(t, byte(i, hashed))) i := add(i, 1) if eq(i, 20) { break } } mstore(o, xor(mload(o), shr(1, and(mload(0x00), and(mload(o), mask))))) o := add(o, 0x20) mstore(o, xor(mload(o), shr(1, and(mload(0x20), and(mload(o), mask))))) } } /// @dev Returns the hexadecimal representation of `value`. /// The output is prefixed with "0x" and encoded using 2 hexadecimal digits per byte. function toHexString(address value) internal pure returns (string memory str) { str = toHexStringNoPrefix(value); /// @solidity memory-safe-assembly assembly { let strLength := add(mload(str), 2) // Compute the length. mstore(str, 0x3078) // Write the "0x" prefix. str := sub(str, 2) // Move the pointer. mstore(str, strLength) // Write the length. } } /// @dev Returns the hexadecimal representation of `value`. /// The output is encoded using 2 hexadecimal digits per byte. function toHexStringNoPrefix(address value) internal pure returns (string memory str) { /// @solidity memory-safe-assembly assembly { str := mload(0x40) // Allocate the memory. // We need 0x20 bytes for the trailing zeros padding, 0x20 bytes for the length, // 0x02 bytes for the prefix, and 0x28 bytes for the digits. // The next multiple of 0x20 above (0x20 + 0x20 + 0x02 + 0x28) is 0x80. mstore(0x40, add(str, 0x80)) // Store "0123456789abcdef" in scratch space. mstore(0x0f, 0x30313233343536373839616263646566) str := add(str, 2) mstore(str, 40) let o := add(str, 0x20) mstore(add(o, 40), 0) value := shl(96, value) // We write the string from rightmost digit to leftmost digit. // The following is essentially a do-while loop that also handles the zero case. for { let i := 0 } 1 {} { let p := add(o, add(i, i)) let temp := byte(i, value) mstore8(add(p, 1), mload(and(temp, 15))) mstore8(p, mload(shr(4, temp))) i := add(i, 1) if eq(i, 20) { break } } } } /// @dev Returns the hex encoded string from the raw bytes. /// The output is encoded using 2 hexadecimal digits per byte. function toHexString(bytes memory raw) internal pure returns (string memory str) { str = toHexStringNoPrefix(raw); /// @solidity memory-safe-assembly assembly { let strLength := add(mload(str), 2) // Compute the length. mstore(str, 0x3078) // Write the "0x" prefix. str := sub(str, 2) // Move the pointer. mstore(str, strLength) // Write the length. } } /// @dev Returns the hex encoded string from the raw bytes. /// The output is encoded using 2 hexadecimal digits per byte. function toHexStringNoPrefix(bytes memory raw) internal pure returns (string memory str) { /// @solidity memory-safe-assembly assembly { let length := mload(raw) str := add(mload(0x40), 2) // Skip 2 bytes for the optional prefix. mstore(str, add(length, length)) // Store the length of the output. // Store "0123456789abcdef" in scratch space. mstore(0x0f, 0x30313233343536373839616263646566) let o := add(str, 0x20) let end := add(raw, length) for {} iszero(eq(raw, end)) {} { raw := add(raw, 1) mstore8(add(o, 1), mload(and(mload(raw), 15))) mstore8(o, mload(and(shr(4, mload(raw)), 15))) o := add(o, 2) } mstore(o, 0) // Zeroize the slot after the string. mstore(0x40, add(o, 0x20)) // Allocate the memory. } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* RUNE STRING OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns the number of UTF characters in the string. function runeCount(string memory s) internal pure returns (uint256 result) { /// @solidity memory-safe-assembly assembly { if mload(s) { mstore(0x00, div(not(0), 255)) mstore(0x20, 0x0202020202020202020202020202020202020202020202020303030304040506) let o := add(s, 0x20) let end := add(o, mload(s)) for { result := 1 } 1 { result := add(result, 1) } { o := add(o, byte(0, mload(shr(250, mload(o))))) if iszero(lt(o, end)) { break } } } } } /// @dev Returns if this string is a 7-bit ASCII string. /// (i.e. all characters codes are in [0..127]) function is7BitASCII(string memory s) internal pure returns (bool result) { /// @solidity memory-safe-assembly assembly { let mask := shl(7, div(not(0), 255)) result := 1 let n := mload(s) if n { let o := add(s, 0x20) let end := add(o, n) let last := mload(end) mstore(end, 0) for {} 1 {} { if and(mask, mload(o)) { result := 0 break } o := add(o, 0x20) if iszero(lt(o, end)) { break } } mstore(end, last) } } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* BYTE STRING OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ // For performance and bytecode compactness, all indices of the following operations // are byte (ASCII) offsets, not UTF character offsets. /// @dev Returns `subject` all occurrences of `search` replaced with `replacement`. function replace(string memory subject, string memory search, string memory replacement) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let subjectLength := mload(subject) let searchLength := mload(search) let replacementLength := mload(replacement) subject := add(subject, 0x20) search := add(search, 0x20) replacement := add(replacement, 0x20) result := add(mload(0x40), 0x20) let subjectEnd := add(subject, subjectLength) if iszero(gt(searchLength, subjectLength)) { let subjectSearchEnd := add(sub(subjectEnd, searchLength), 1) let h := 0 if iszero(lt(searchLength, 0x20)) { h := keccak256(search, searchLength) } let m := shl(3, sub(0x20, and(searchLength, 0x1f))) let s := mload(search) for {} 1 {} { let t := mload(subject) // Whether the first `searchLength % 32` bytes of // `subject` and `search` matches. if iszero(shr(m, xor(t, s))) { if h { if iszero(eq(keccak256(subject, searchLength), h)) { mstore(result, t) result := add(result, 1) subject := add(subject, 1) if iszero(lt(subject, subjectSearchEnd)) { break } continue } } // Copy the `replacement` one word at a time. for { let o := 0 } 1 {} { mstore(add(result, o), mload(add(replacement, o))) o := add(o, 0x20) if iszero(lt(o, replacementLength)) { break } } result := add(result, replacementLength) subject := add(subject, searchLength) if searchLength { if iszero(lt(subject, subjectSearchEnd)) { break } continue } } mstore(result, t) result := add(result, 1) subject := add(subject, 1) if iszero(lt(subject, subjectSearchEnd)) { break } } } let resultRemainder := result result := add(mload(0x40), 0x20) let k := add(sub(resultRemainder, result), sub(subjectEnd, subject)) // Copy the rest of the string one word at a time. for {} lt(subject, subjectEnd) {} { mstore(resultRemainder, mload(subject)) resultRemainder := add(resultRemainder, 0x20) subject := add(subject, 0x20) } result := sub(result, 0x20) let last := add(add(result, 0x20), k) // Zeroize the slot after the string. mstore(last, 0) mstore(0x40, add(last, 0x20)) // Allocate the memory. mstore(result, k) // Store the length. } } /// @dev Returns the byte index of the first location of `search` in `subject`, /// searching from left to right, starting from `from`. /// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found. function indexOf(string memory subject, string memory search, uint256 from) internal pure returns (uint256 result) { /// @solidity memory-safe-assembly assembly { for { let subjectLength := mload(subject) } 1 {} { if iszero(mload(search)) { if iszero(gt(from, subjectLength)) { result := from break } result := subjectLength break } let searchLength := mload(search) let subjectStart := add(subject, 0x20) result := not(0) // Initialize to `NOT_FOUND`. subject := add(subjectStart, from) let end := add(sub(add(subjectStart, subjectLength), searchLength), 1) let m := shl(3, sub(0x20, and(searchLength, 0x1f))) let s := mload(add(search, 0x20)) if iszero(and(lt(subject, end), lt(from, subjectLength))) { break } if iszero(lt(searchLength, 0x20)) { for { let h := keccak256(add(search, 0x20), searchLength) } 1 {} { if iszero(shr(m, xor(mload(subject), s))) { if eq(keccak256(subject, searchLength), h) { result := sub(subject, subjectStart) break } } subject := add(subject, 1) if iszero(lt(subject, end)) { break } } break } for {} 1 {} { if iszero(shr(m, xor(mload(subject), s))) { result := sub(subject, subjectStart) break } subject := add(subject, 1) if iszero(lt(subject, end)) { break } } break } } } /// @dev Returns the byte index of the first location of `search` in `subject`, /// searching from left to right. /// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found. function indexOf(string memory subject, string memory search) internal pure returns (uint256 result) { result = indexOf(subject, search, 0); } /// @dev Returns the byte index of the first location of `search` in `subject`, /// searching from right to left, starting from `from`. /// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found. function lastIndexOf(string memory subject, string memory search, uint256 from) internal pure returns (uint256 result) { /// @solidity memory-safe-assembly assembly { for {} 1 {} { result := not(0) // Initialize to `NOT_FOUND`. let searchLength := mload(search) if gt(searchLength, mload(subject)) { break } let w := result let fromMax := sub(mload(subject), searchLength) if iszero(gt(fromMax, from)) { from := fromMax } let end := add(add(subject, 0x20), w) subject := add(add(subject, 0x20), from) if iszero(gt(subject, end)) { break } // As this function is not too often used, // we shall simply use keccak256 for smaller bytecode size. for { let h := keccak256(add(search, 0x20), searchLength) } 1 {} { if eq(keccak256(subject, searchLength), h) { result := sub(subject, add(end, 1)) break } subject := add(subject, w) // `sub(subject, 1)`. if iszero(gt(subject, end)) { break } } break } } } /// @dev Returns the byte index of the first location of `search` in `subject`, /// searching from right to left. /// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found. function lastIndexOf(string memory subject, string memory search) internal pure returns (uint256 result) { result = lastIndexOf(subject, search, uint256(int256(-1))); } /// @dev Returns whether `subject` starts with `search`. function startsWith(string memory subject, string memory search) internal pure returns (bool result) { /// @solidity memory-safe-assembly assembly { let searchLength := mload(search) // Just using keccak256 directly is actually cheaper. // forgefmt: disable-next-item result := and( iszero(gt(searchLength, mload(subject))), eq( keccak256(add(subject, 0x20), searchLength), keccak256(add(search, 0x20), searchLength) ) ) } } /// @dev Returns whether `subject` ends with `search`. function endsWith(string memory subject, string memory search) internal pure returns (bool result) { /// @solidity memory-safe-assembly assembly { let searchLength := mload(search) let subjectLength := mload(subject) // Whether `search` is not longer than `subject`. let withinRange := iszero(gt(searchLength, subjectLength)) // Just using keccak256 directly is actually cheaper. // forgefmt: disable-next-item result := and( withinRange, eq( keccak256( // `subject + 0x20 + max(subjectLength - searchLength, 0)`. add(add(subject, 0x20), mul(withinRange, sub(subjectLength, searchLength))), searchLength ), keccak256(add(search, 0x20), searchLength) ) ) } } /// @dev Returns `subject` repeated `times`. function repeat(string memory subject, uint256 times) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let subjectLength := mload(subject) if iszero(or(iszero(times), iszero(subjectLength))) { subject := add(subject, 0x20) result := mload(0x40) let output := add(result, 0x20) for {} 1 {} { // Copy the `subject` one word at a time. for { let o := 0 } 1 {} { mstore(add(output, o), mload(add(subject, o))) o := add(o, 0x20) if iszero(lt(o, subjectLength)) { break } } output := add(output, subjectLength) times := sub(times, 1) if iszero(times) { break } } mstore(output, 0) // Zeroize the slot after the string. let resultLength := sub(output, add(result, 0x20)) mstore(result, resultLength) // Store the length. // Allocate the memory. mstore(0x40, add(result, add(resultLength, 0x20))) } } } /// @dev Returns a copy of `subject` sliced from `start` to `end` (exclusive). /// `start` and `end` are byte offsets. function slice(string memory subject, uint256 start, uint256 end) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let subjectLength := mload(subject) if iszero(gt(subjectLength, end)) { end := subjectLength } if iszero(gt(subjectLength, start)) { start := subjectLength } if lt(start, end) { result := mload(0x40) let resultLength := sub(end, start) mstore(result, resultLength) subject := add(subject, start) let w := not(0x1f) // Copy the `subject` one word at a time, backwards. for { let o := and(add(resultLength, 0x1f), w) } 1 {} { mstore(add(result, o), mload(add(subject, o))) o := add(o, w) // `sub(o, 0x20)`. if iszero(o) { break } } // Zeroize the slot after the string. mstore(add(add(result, 0x20), resultLength), 0) // Allocate memory for the length and the bytes, // rounded up to a multiple of 32. mstore(0x40, add(result, and(add(resultLength, 0x3f), w))) } } } /// @dev Returns a copy of `subject` sliced from `start` to the end of the string. /// `start` is a byte offset. function slice(string memory subject, uint256 start) internal pure returns (string memory result) { result = slice(subject, start, uint256(int256(-1))); } /// @dev Returns all the indices of `search` in `subject`. /// The indices are byte offsets. function indicesOf(string memory subject, string memory search) internal pure returns (uint256[] memory result) { /// @solidity memory-safe-assembly assembly { let subjectLength := mload(subject) let searchLength := mload(search) if iszero(gt(searchLength, subjectLength)) { subject := add(subject, 0x20) search := add(search, 0x20) result := add(mload(0x40), 0x20) let subjectStart := subject let subjectSearchEnd := add(sub(add(subject, subjectLength), searchLength), 1) let h := 0 if iszero(lt(searchLength, 0x20)) { h := keccak256(search, searchLength) } let m := shl(3, sub(0x20, and(searchLength, 0x1f))) let s := mload(search) for {} 1 {} { let t := mload(subject) // Whether the first `searchLength % 32` bytes of // `subject` and `search` matches. if iszero(shr(m, xor(t, s))) { if h { if iszero(eq(keccak256(subject, searchLength), h)) { subject := add(subject, 1) if iszero(lt(subject, subjectSearchEnd)) { break } continue } } // Append to `result`. mstore(result, sub(subject, subjectStart)) result := add(result, 0x20) // Advance `subject` by `searchLength`. subject := add(subject, searchLength) if searchLength { if iszero(lt(subject, subjectSearchEnd)) { break } continue } } subject := add(subject, 1) if iszero(lt(subject, subjectSearchEnd)) { break } } let resultEnd := result // Assign `result` to the free memory pointer. result := mload(0x40) // Store the length of `result`. mstore(result, shr(5, sub(resultEnd, add(result, 0x20)))) // Allocate memory for result. // We allocate one more word, so this array can be recycled for {split}. mstore(0x40, add(resultEnd, 0x20)) } } } /// @dev Returns a arrays of strings based on the `delimiter` inside of the `subject` string. function split(string memory subject, string memory delimiter) internal pure returns (string[] memory result) { uint256[] memory indices = indicesOf(subject, delimiter); /// @solidity memory-safe-assembly assembly { let w := not(0x1f) let indexPtr := add(indices, 0x20) let indicesEnd := add(indexPtr, shl(5, add(mload(indices), 1))) mstore(add(indicesEnd, w), mload(subject)) mstore(indices, add(mload(indices), 1)) let prevIndex := 0 for {} 1 {} { let index := mload(indexPtr) mstore(indexPtr, 0x60) if iszero(eq(index, prevIndex)) { let element := mload(0x40) let elementLength := sub(index, prevIndex) mstore(element, elementLength) // Copy the `subject` one word at a time, backwards. for { let o := and(add(elementLength, 0x1f), w) } 1 {} { mstore(add(element, o), mload(add(add(subject, prevIndex), o))) o := add(o, w) // `sub(o, 0x20)`. if iszero(o) { break } } // Zeroize the slot after the string. mstore(add(add(element, 0x20), elementLength), 0) // Allocate memory for the length and the bytes, // rounded up to a multiple of 32. mstore(0x40, add(element, and(add(elementLength, 0x3f), w))) // Store the `element` into the array. mstore(indexPtr, element) } prevIndex := add(index, mload(delimiter)) indexPtr := add(indexPtr, 0x20) if iszero(lt(indexPtr, indicesEnd)) { break } } result := indices if iszero(mload(delimiter)) { result := add(indices, 0x20) mstore(result, sub(mload(indices), 2)) } } } /// @dev Returns a concatenated string of `a` and `b`. /// Cheaper than `string.concat()` and does not de-align the free memory pointer. function concat(string memory a, string memory b) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let w := not(0x1f) result := mload(0x40) let aLength := mload(a) // Copy `a` one word at a time, backwards. for { let o := and(add(aLength, 0x20), w) } 1 {} { mstore(add(result, o), mload(add(a, o))) o := add(o, w) // `sub(o, 0x20)`. if iszero(o) { break } } let bLength := mload(b) let output := add(result, aLength) // Copy `b` one word at a time, backwards. for { let o := and(add(bLength, 0x20), w) } 1 {} { mstore(add(output, o), mload(add(b, o))) o := add(o, w) // `sub(o, 0x20)`. if iszero(o) { break } } let totalLength := add(aLength, bLength) let last := add(add(result, 0x20), totalLength) // Zeroize the slot after the string. mstore(last, 0) // Stores the length. mstore(result, totalLength) // Allocate memory for the length and the bytes, // rounded up to a multiple of 32. mstore(0x40, and(add(last, 0x1f), w)) } } /// @dev Returns a copy of the string in either lowercase or UPPERCASE. /// WARNING! This function is only compatible with 7-bit ASCII strings. function toCase(string memory subject, bool toUpper) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let length := mload(subject) if length { result := add(mload(0x40), 0x20) subject := add(subject, 1) let flags := shl(add(70, shl(5, toUpper)), 0x3ffffff) let w := not(0) for { let o := length } 1 {} { o := add(o, w) let b := and(0xff, mload(add(subject, o))) mstore8(add(result, o), xor(b, and(shr(b, flags), 0x20))) if iszero(o) { break } } result := mload(0x40) mstore(result, length) // Store the length. let last := add(add(result, 0x20), length) mstore(last, 0) // Zeroize the slot after the string. mstore(0x40, add(last, 0x20)) // Allocate the memory. } } } /// @dev Returns a string from a small bytes32 string. /// `smallString` must be null terminated, or behavior will be undefined. function fromSmallString(bytes32 smallString) internal pure returns (string memory result) { if (smallString == bytes32(0)) return result; /// @solidity memory-safe-assembly assembly { result := mload(0x40) let n := 0 for {} 1 {} { n := add(n, 1) if iszero(byte(n, smallString)) { break } // Scan for '\0'. } mstore(result, n) let o := add(result, 0x20) mstore(o, smallString) mstore(add(o, n), 0) mstore(0x40, add(result, 0x40)) } } /// @dev Returns a lowercased copy of the string. /// WARNING! This function is only compatible with 7-bit ASCII strings. function lower(string memory subject) internal pure returns (string memory result) { result = toCase(subject, false); } /// @dev Returns an UPPERCASED copy of the string. /// WARNING! This function is only compatible with 7-bit ASCII strings. function upper(string memory subject) internal pure returns (string memory result) { result = toCase(subject, true); } /// @dev Escapes the string to be used within HTML tags. function escapeHTML(string memory s) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let end := add(s, mload(s)) result := add(mload(0x40), 0x20) // Store the bytes of the packed offsets and strides into the scratch space. // `packed = (stride << 5) | offset`. Max offset is 20. Max stride is 6. mstore(0x1f, 0x900094) mstore(0x08, 0xc0000000a6ab) // Store ""&'<>" into the scratch space. mstore(0x00, shl(64, 0x2671756f743b26616d703b262333393b266c743b2667743b)) for {} iszero(eq(s, end)) {} { s := add(s, 1) let c := and(mload(s), 0xff) // Not in `["\"","'","&","<",">"]`. if iszero(and(shl(c, 1), 0x500000c400000000)) { mstore8(result, c) result := add(result, 1) continue } let t := shr(248, mload(c)) mstore(result, mload(and(t, 0x1f))) result := add(result, shr(5, t)) } let last := result mstore(last, 0) // Zeroize the slot after the string. result := mload(0x40) mstore(result, sub(last, add(result, 0x20))) // Store the length. mstore(0x40, add(last, 0x20)) // Allocate the memory. } } /// @dev Escapes the string to be used within double-quotes in a JSON. /// If `addDoubleQuotes` is true, the result will be enclosed in double-quotes. function escapeJSON(string memory s, bool addDoubleQuotes) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { let end := add(s, mload(s)) result := add(mload(0x40), 0x20) if addDoubleQuotes { mstore8(result, 34) result := add(1, result) } // Store "\\u0000" in scratch space. // Store "0123456789abcdef" in scratch space. // Also, store `{0x08:"b", 0x09:"t", 0x0a:"n", 0x0c:"f", 0x0d:"r"}`. // into the scratch space. mstore(0x15, 0x5c75303030303031323334353637383961626364656662746e006672) // Bitmask for detecting `["\"","\\"]`. let e := or(shl(0x22, 1), shl(0x5c, 1)) for {} iszero(eq(s, end)) {} { s := add(s, 1) let c := and(mload(s), 0xff) if iszero(lt(c, 0x20)) { if iszero(and(shl(c, 1), e)) { // Not in `["\"","\\"]`. mstore8(result, c) result := add(result, 1) continue } mstore8(result, 0x5c) // "\\". mstore8(add(result, 1), c) result := add(result, 2) continue } if iszero(and(shl(c, 1), 0x3700)) { // Not in `["\b","\t","\n","\f","\d"]`. mstore8(0x1d, mload(shr(4, c))) // Hex value. mstore8(0x1e, mload(and(c, 15))) // Hex value. mstore(result, mload(0x19)) // "\\u00XX". result := add(result, 6) continue } mstore8(result, 0x5c) // "\\". mstore8(add(result, 1), mload(add(c, 8))) result := add(result, 2) } if addDoubleQuotes { mstore8(result, 34) result := add(1, result) } let last := result mstore(last, 0) // Zeroize the slot after the string. result := mload(0x40) mstore(result, sub(last, add(result, 0x20))) // Store the length. mstore(0x40, add(last, 0x20)) // Allocate the memory. } } /// @dev Escapes the string to be used within double-quotes in a JSON. function escapeJSON(string memory s) internal pure returns (string memory result) { result = escapeJSON(s, false); } /// @dev Returns whether `a` equals `b`. function eq(string memory a, string memory b) internal pure returns (bool result) { /// @solidity memory-safe-assembly assembly { result := eq(keccak256(add(a, 0x20), mload(a)), keccak256(add(b, 0x20), mload(b))) } } /// @dev Returns whether `a` equals `b`. For small strings up to 32 bytes. /// `b` must be null terminated, or behavior will be undefined. function eqs(string memory a, bytes32 b) internal pure returns (bool result) { /// @solidity memory-safe-assembly assembly { // These should be evaluated on compile time, as far as possible. let x := and(b, add(not(b), 1)) let r := or(shl(8, iszero(b)), shl(7, iszero(iszero(shr(128, x))))) r := or(r, shl(6, iszero(iszero(shr(64, shr(r, x)))))) r := or(r, shl(5, lt(0xffffffff, shr(r, x)))) r := or(r, shl(4, lt(0xffff, shr(r, x)))) r := or(r, shl(3, lt(0xff, shr(r, x)))) result := gt(eq(mload(a), sub(32, shr(3, r))), shr(r, xor(b, mload(add(a, 0x20))))) } } /// @dev Packs a single string with its length into a single word. /// Returns `bytes32(0)` if the length is zero or greater than 31. function packOne(string memory a) internal pure returns (bytes32 result) { /// @solidity memory-safe-assembly assembly { // We don't need to zero right pad the string, // since this is our own custom non-standard packing scheme. result := mul( // Load the length and the bytes. mload(add(a, 0x1f)), // `length != 0 && length < 32`. Abuses underflow. // Assumes that the length is valid and within the block gas limit. lt(sub(mload(a), 1), 0x1f) ) } } /// @dev Unpacks a string packed using {packOne}. /// Returns the empty string if `packed` is `bytes32(0)`. /// If `packed` is not an output of {packOne}, the output behavior is undefined. function unpackOne(bytes32 packed) internal pure returns (string memory result) { /// @solidity memory-safe-assembly assembly { // Grab the free memory pointer. result := mload(0x40) // Allocate 2 words (1 for the length, 1 for the bytes). mstore(0x40, add(result, 0x40)) // Zeroize the length slot. mstore(result, 0) // Store the length and bytes. mstore(add(result, 0x1f), packed) // Right pad with zeroes. mstore(add(add(result, 0x20), mload(result)), 0) } } /// @dev Packs two strings with their lengths into a single word. /// Returns `bytes32(0)` if combined length is zero or greater than 30. function packTwo(string memory a, string memory b) internal pure returns (bytes32 result) { /// @solidity memory-safe-assembly assembly { let aLength := mload(a) // We don't need to zero right pad the strings, // since this is our own custom non-standard packing scheme. result := mul( // Load the length and the bytes of `a` and `b`. or( shl(shl(3, sub(0x1f, aLength)), mload(add(a, aLength))), mload(sub(add(b, 0x1e), aLength)) ), // `totalLength != 0 && totalLength < 31`. Abuses underflow. // Assumes that the lengths are valid and within the block gas limit. lt(sub(add(aLength, mload(b)), 1), 0x1e) ) } } /// @dev Unpacks strings packed using {packTwo}. /// Returns the empty strings if `packed` is `bytes32(0)`. /// If `packed` is not an output of {packTwo}, the output behavior is undefined. function unpackTwo(bytes32 packed) internal pure returns (string memory resultA, string memory resultB) { /// @solidity memory-safe-assembly assembly { // Grab the free memory pointer. resultA := mload(0x40) resultB := add(resultA, 0x40) // Allocate 2 words for each string (1 for the length, 1 for the byte). Total 4 words. mstore(0x40, add(resultB, 0x40)) // Zeroize the length slots. mstore(resultA, 0) mstore(resultB, 0) // Store the lengths and bytes. mstore(add(resultA, 0x1f), packed) mstore(add(resultB, 0x1f), mload(add(add(resultA, 0x20), mload(resultA)))) // Right pad with zeroes. mstore(add(add(resultA, 0x20), mload(resultA)), 0) mstore(add(add(resultB, 0x20), mload(resultB)), 0) } } /// @dev Directly returns `a` without copying. function directReturn(string memory a) internal pure { assembly { // Assumes that the string does not start from the scratch space. let retStart := sub(a, 0x20) let retSize := add(mload(a), 0x40) // Right pad with zeroes. Just in case the string is produced // by a method that doesn't zero right pad. mstore(add(retStart, retSize), 0) // Store the return offset. mstore(retStart, 0x20) // End the transaction, returning the string. return(retStart, retSize) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1, "Math: mulDiv overflow"); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.0; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/ShortStrings.sol) pragma solidity ^0.8.8; import "./StorageSlot.sol"; // | string | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA | // | length | 0x BB | type ShortString is bytes32; /** * @dev This library provides functions to convert short memory strings * into a `ShortString` type that can be used as an immutable variable. * * Strings of arbitrary length can be optimized using this library if * they are short enough (up to 31 bytes) by packing them with their * length (1 byte) in a single EVM word (32 bytes). Additionally, a * fallback mechanism can be used for every other case. * * Usage example: * * ```solidity * contract Named { * using ShortStrings for *; * * ShortString private immutable _name; * string private _nameFallback; * * constructor(string memory contractName) { * _name = contractName.toShortStringWithFallback(_nameFallback); * } * * function name() external view returns (string memory) { * return _name.toStringWithFallback(_nameFallback); * } * } * ``` */ library ShortStrings { // Used as an identifier for strings longer than 31 bytes. bytes32 private constant _FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF; error StringTooLong(string str); error InvalidShortString(); /** * @dev Encode a string of at most 31 chars into a `ShortString`. * * This will trigger a `StringTooLong` error is the input string is too long. */ function toShortString(string memory str) internal pure returns (ShortString) { bytes memory bstr = bytes(str); if (bstr.length > 31) { revert StringTooLong(str); } return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length)); } /** * @dev Decode a `ShortString` back to a "normal" string. */ function toString(ShortString sstr) internal pure returns (string memory) { uint256 len = byteLength(sstr); // using `new string(len)` would work locally but is not memory safe. string memory str = new string(32); /// @solidity memory-safe-assembly assembly { mstore(str, len) mstore(add(str, 0x20), sstr) } return str; } /** * @dev Return the length of a `ShortString`. */ function byteLength(ShortString sstr) internal pure returns (uint256) { uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF; if (result > 31) { revert InvalidShortString(); } return result; } /** * @dev Encode a string into a `ShortString`, or write it to storage if it is too long. */ function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) { if (bytes(value).length < 32) { return toShortString(value); } else { StorageSlot.getStringSlot(store).value = value; return ShortString.wrap(_FALLBACK_SENTINEL); } } /** * @dev Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}. */ function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) { if (ShortString.unwrap(value) != _FALLBACK_SENTINEL) { return toString(value); } else { return store; } } /** * @dev Return the length of a string that was encoded to `ShortString` or written to storage using {setWithFallback}. * * WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of * actual characters as the UTF-8 encoding of a single character can span over multiple bytes. */ function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) { if (ShortString.unwrap(value) != _FALLBACK_SENTINEL) { return byteLength(value); } else { return bytes(store).length; } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC5267.sol) pragma solidity ^0.8.0; interface IERC5267 { /** * @dev MAY be emitted to signal that the domain could have changed. */ event EIP712DomainChanged(); /** * @dev returns the fields and values that describe the domain separator used by this contract for EIP-712 * signature. */ function eip712Domain() external view returns ( bytes1 fields, string memory name, string memory version, uint256 chainId, address verifyingContract, bytes32 salt, uint256[] memory extensions ); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol) // This file was procedurally generated from scripts/generate/templates/StorageSlot.js. pragma solidity ^0.8.0; /** * @dev Library for reading and writing primitive types to specific storage slots. * * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts. * This library helps with reading and writing to such slots without the need for inline assembly. * * The functions in this library return Slot structs that contain a `value` member that can be used to read or write. * * Example usage to set ERC1967 implementation slot: * ```solidity * contract ERC1967 { * bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; * * function _getImplementation() internal view returns (address) { * return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; * } * * function _setImplementation(address newImplementation) internal { * require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract"); * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; * } * } * ``` * * _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._ * _Available since v4.9 for `string`, `bytes`._ */ library StorageSlot { struct AddressSlot { address value; } struct BooleanSlot { bool value; } struct Bytes32Slot { bytes32 value; } struct Uint256Slot { uint256 value; } struct StringSlot { string value; } struct BytesSlot { bytes value; } /** * @dev Returns an `AddressSlot` with member `value` located at `slot`. */ function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BooleanSlot` with member `value` located at `slot`. */ function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Bytes32Slot` with member `value` located at `slot`. */ function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Uint256Slot` with member `value` located at `slot`. */ function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `StringSlot` with member `value` located at `slot`. */ function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `StringSlot` representation of the string storage pointer `store`. */ function getStringSlot(string storage store) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } } /** * @dev Returns an `BytesSlot` with member `value` located at `slot`. */ function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`. */ function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } } }
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