ERC-721
Overview
Max Total Supply
4 KATANAID
Holders
4
Market
Onchain Market Cap
-
Circulating Supply Market Cap
-
Other Info
Token Contract
Balance
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Contract Source Code Verified (Exact Match)
Contract Name:
Domains
Compiler Version
v0.8.26+commit.8a97fa7a
Optimization Enabled:
Yes with 1000 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.26; import "@openzeppelin/contracts/access/Ownable2Step.sol"; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import "@openzeppelin/contracts/utils/Base64.sol"; import "./Withdrawable.sol"; contract Domains is ERC721, Ownable2Step, Withdrawable { // Domain struct that holds name and expiration timestamp struct Domain { string name; uint256 expiredAt; } // solhint-disable-next-line var-name-mixedcase string public TOP_LEVEL_DOMAIN; // URL for image template. Used by tokenURI function. string public imageTemplateURIPrefix; // The amount of time after expiration that the name will still belong to // the old owner. After that time, another account can lease it. uint256 public safePeriodDays = 60; uint256 private constant _SECONDS_IN_DAY = 24 * 60 * 60; uint256 private constant _SECONDS_IN_YEAR = _SECONDS_IN_DAY * 365; // Token id counter. Starts with 1, since 0 is interpreted as absence. uint256 private _currentTokenId = 1; // Absolute prices for the length of the name till 5 chars. So a price for // a name with one char is at index 0, a name with two chars is at index 1 // and so on. uint256[5] private _pricesPerNameLength = [ 0.08 ether, // 164.87 $ 0.0321 ether, // 66.15 $ 0.0161 ether, // 33.18 $ 0.0064 ether, // 13.19 $ 0.0013 ether // 2.68 $ ]; // Percents of discounts per each year till 5. So discount for 1 year // is at index 0, for 2 years at index 1 and so on. uint256[5] private _discountsPerYear = [0, 10, 15, 20, 25]; // Instantly map a name to a tokenId mapping(string => uint256) private _domainNameToTokenId; // Instantly map a tokenId to a domain mapping(uint256 => Domain) private _tokenIdToDomain; // Instantly find a primary token id of the owner mapping(address => uint256) private _primaryTokenId; // Instantly find a price for specific name mapping(string => uint256) private _customPrices; event ImageTemplateURIPrefixChanged(string newImageTemplateURIPrefix); event SafePeriodChanged(uint256 newSafePeriodDays); event PricePerNameLengthChanged(uint256 length, uint256 price); event DiscountPerYearChanged(uint256 yearAmount, uint256 discount); event CustomPriceChanged(string domainName, uint256 price); event PrimaryNameChanged( address indexed owner, uint256 indexed tokenId, string domainName, bool isPrimary ); event Leased( address indexed to, uint256 indexed tokenId, string domainName, bool isPrimary, uint256 expiredAt, uint256 price, uint256 timestamp ); constructor( string memory tokenName, string memory tokenSymbol, string memory imageTemplateURIPrefix_, string memory topLevelDomain, address ownerAddress ) ERC721(tokenName, tokenSymbol) Ownable(ownerAddress) { imageTemplateURIPrefix = imageTemplateURIPrefix_; TOP_LEVEL_DOMAIN = string.concat(".", topLevelDomain); } // Owner's functions. Contract variables adjustement function setImageTemplateURIPrefix(string calldata newImageTemplateURIPrefix) external onlyOwner { emit ImageTemplateURIPrefixChanged(newImageTemplateURIPrefix); imageTemplateURIPrefix = newImageTemplateURIPrefix; } function setSafePeriod(uint256 newSafePeriodDays) external onlyOwner { emit SafePeriodChanged(newSafePeriodDays); safePeriodDays = newSafePeriodDays; } function setPricePerNameLength(uint256 length, uint256 price) external onlyOwner { require(length > 0, "Length must be > 0"); require(length < 6, "Length must be < 6"); require(price > 0, "Price must be > 0"); emit PricePerNameLengthChanged(length, price); _pricesPerNameLength[length - 1] = price; } function setDiscountPerYear(uint256 yearAmount, uint256 percent) external onlyOwner { require(yearAmount > 0, "Year number must be > 0"); require(yearAmount < 6, "Year number must be < 6"); require(percent <= 100, "Percent must be <= 100"); emit DiscountPerYearChanged(yearAmount, percent); _discountsPerYear[yearAmount - 1] = percent; } function setCustomPrice(string calldata domainName, uint256 price) external onlyOwner { require(bytes(domainName).length > 0, "Name can not be blank"); require(price > 0, "Price must be > 0"); emit CustomPriceChanged(domainName, price); _customPrices[domainName] = price; } // Client's functions // Set primary tokenId for account function setPrimary(string calldata domainName, bool isPrimary) external { uint256 tokenId = _domainNameToTokenId[domainName]; require(tokenId > 0, "The name does not exist"); require(ownerOf(tokenId) == msg.sender, "The caller does not own the name"); emit PrimaryNameChanged(msg.sender, tokenId, domainName, isPrimary); if (isPrimary) { _primaryTokenId[msg.sender] = tokenId; } else { uint256 currentPrimaryTokenId = _primaryTokenId[msg.sender]; if (currentPrimaryTokenId == tokenId) { delete _primaryTokenId[msg.sender]; } } } // Lease a name function lease( string calldata domainName, uint256 yearAmount, bool isPrimary ) external payable returns(uint256) { require(bytes(domainName).length > 0, "Name can not be blank"); require(yearAmount > 0, "Lease time can not be zero"); require(_strvalid(domainName), "Name has forbidden characters"); require(msg.value == calcNamePrice(domainName, yearAmount), "Mismatch of funds"); uint256 tokenId = _domainNameToTokenId[domainName]; uint256 expiredAt = uint256(block.timestamp + yearAmount * _SECONDS_IN_YEAR); if (tokenId == 0) { return _createNewName(domainName, expiredAt, isPrimary); } emit Leased( msg.sender, tokenId, domainName, isPrimary, expiredAt, msg.value, block.timestamp ); if (isPrimary) { _primaryTokenId[msg.sender] = tokenId; } Domain storage domain = _tokenIdToDomain[tokenId]; address currentOwner = ownerOf(tokenId); if (currentOwner == msg.sender) { domain.expiredAt = expiredAt; } else { uint256 releasedAt = _calcReleaseTime(domain.expiredAt); if (releasedAt > block.timestamp) { revert("The name is still in use"); } domain.expiredAt = expiredAt; _transfer(currentOwner, msg.sender, tokenId); } return tokenId; } // View functions // Check total amount of tokens function totalSupply() external view returns(uint256) { return _currentTokenId - 1; } // Get a full name for a token id function tokenIdToFullName(uint256 tokenId) public view returns(string memory) { Domain memory domain = _tokenIdToDomain[tokenId]; if (bytes(domain.name).length > 0) { return string.concat(domain.name, TOP_LEVEL_DOMAIN); } return ""; } // Get address for a domain name function nameToAddress(string calldata domainName) public view returns(address) { uint256 tokenId = _domainNameToTokenId[domainName]; Domain memory domain = _tokenIdToDomain[tokenId]; if (domain.expiredAt < block.timestamp) { return address(0); } return ownerOf(tokenId); } // Get address for a full domain name function fullNameToAddress(string calldata fullDomainName) public view returns(address) { uint256 length = bytes(fullDomainName).length; uint256 suffixLength = bytes(TOP_LEVEL_DOMAIN).length; require(length > suffixLength, "Name is too short"); string calldata suffix = fullDomainName[length - suffixLength:length]; require( keccak256(bytes(TOP_LEVEL_DOMAIN)) == keccak256(bytes(suffix)), "Incorrect name" ); string calldata domainName = fullDomainName[0:length - suffixLength]; return nameToAddress(domainName); } // Get a domain name for an address. Only primary name used. // If account does not have primary address, it returns empty string // indicating absence of the name function addressToName(address account) public view returns(string memory) { uint256 tokenId = _primaryTokenId[account]; Domain memory domain = _tokenIdToDomain[tokenId]; if (domain.expiredAt > block.timestamp && ownerOf(tokenId) == account) { return domain.name; } return ""; } // Get a domain name with top level suffix for an address. Only primary name used. // If account does not have primary address, it returns empty string // indicating absence of the name function addressToFullName(address account) public view returns(string memory) { string memory domainName = addressToName(account); if (bytes(domainName).length > 0) { return string.concat(domainName, TOP_LEVEL_DOMAIN); } return ""; } // Get timestamp when the name becomes expired. After that time the name // still CAN NOT be leased by other accounts function getExpirationTime(string calldata domainName) public view returns(uint256) { uint256 tokenId = _domainNameToTokenId[domainName]; Domain memory domain = _tokenIdToDomain[tokenId]; return domain.expiredAt; } // Get timestamp when the name becomes vacant. After that time the name // can be leased by other accounts function getReleaseTime(string calldata domainName) public view returns(uint256) { uint256 tokenId = _domainNameToTokenId[domainName]; if (tokenId == 0) { return 0; } Domain memory domain = _tokenIdToDomain[tokenId]; return _calcReleaseTime(domain.expiredAt); } // Get current price for amount of name's characters function getPricePerNameLength(uint256 length) public view returns(uint256) { require(length > 0, "Length must be > 0"); uint256 clampedLength = length > 5 ? 5 : length; return _pricesPerNameLength[clampedLength - 1]; } // Get current percent discount for amount of years leased function getDiscountPerYear(uint256 yearAmount) public view returns(uint256) { require(yearAmount > 0, "Year number must be > 0"); uint256 clampedYearsNum = yearAmount > 5 ? 5 : yearAmount; return _discountsPerYear[clampedYearsNum - 1]; } // Get custom price for a name function getCustomPrice(string calldata domainName) public view returns(uint256) { return _customPrices[domainName]; } // Precalculate full price for name function calcNamePrice( string calldata domainName, uint256 yearAmount ) public view returns(uint256) { // set custom price by default uint256 basePrice = _customPrices[domainName]; // recalculate price for name length if there is no custom price if (basePrice == 0) { uint256 domainNameLength = _strlen(domainName); basePrice = getPricePerNameLength(domainNameLength); } uint256 discountPerYear = getDiscountPerYear(yearAmount); return basePrice * yearAmount * (100 - discountPerYear) / 100; } // Check if name can be leased function isVacant(string calldata domainName) public view returns(bool) { require(bytes(domainName).length > 0, "Name can not be blank"); uint256 tokenId = _domainNameToTokenId[domainName]; if (tokenId == 0) { return true; } Domain memory domain = _tokenIdToDomain[tokenId]; return _calcReleaseTime(domain.expiredAt) < block.timestamp; } function tokenURI(uint256 tokenId) public view override returns (string memory) { string memory fullName = tokenIdToFullName(tokenId); string memory base64encodedName = Base64.encodeURL(bytes(_tokenIdToDomain[tokenId].name)); string memory json = string(abi.encodePacked( // solhint-disable-next-line max-line-length "{\"name\": \"", fullName, "\", \"description\": \"\", \"image\": \"", imageTemplateURIPrefix, base64encodedName, "\"}" )); string memory jsonBase64 = Base64.encode(bytes(json)); return string(abi.encodePacked("data:application/json;base64,", jsonBase64)); } // internal and private function _createNewName( string calldata domainName, uint256 expiredAt, bool isPrimary ) private returns(uint256) { uint256 tokenId = _currentTokenId; _currentTokenId = tokenId + 1; if (isPrimary) { _primaryTokenId[msg.sender] = tokenId; } _domainNameToTokenId[domainName] = tokenId; _tokenIdToDomain[tokenId] = Domain({name: domainName, expiredAt: expiredAt}); emit Leased( msg.sender, tokenId, domainName, isPrimary, expiredAt, msg.value, block.timestamp ); _mint(msg.sender, tokenId); return tokenId; } function _calcReleaseTime(uint256 expiredAt) private view returns(uint256) { return expiredAt + safePeriodDays * _SECONDS_IN_DAY; } // Forbid first 32 bytes of UTF8/ASCII char list including whitespace (0x20) function _strvalid(string calldata s) private pure returns(bool) { bytes memory b = bytes(s); uint256 i = 0; // solhint-disable-next-line gas-length-in-loops while (i < b.length) { bytes1 char = b[i]; // Pass if the char is between '0' and '9' if (char >= 0x30 && char <= 0x39) { i++; continue; } // Pass if the char is between 'a' and 'z' if (char >= 0x61 && char <= 0x7A) { i++; continue; } // Pass if it is a valid 4-bytes utf8 F0-9F-x-x sequence if (char == 0xf0 && i + 3 < b.length) { bytes1 secondByte = b[i + 1]; bytes1 thirdByte = b[i + 2]; bytes1 fourthByte = b[i + 3]; if ( secondByte == 0x9f && thirdByte >= 0x80 && thirdByte <= 0xbf && fourthByte >= 0x80 && fourthByte <= 0xbf ) { i += 4; continue; } } return false; } return true; } // Using ENS function that helps to calculate length of a string // with multibyte characters function _strlen(string calldata s) private pure returns(uint256) { uint256 len; uint256 i = 0; uint256 bytelength = bytes(s).length; for (len = 0; i < bytelength; len++) { bytes1 b = bytes(s)[i]; if (b < 0x80) { i += 1; } else if (b < 0xE0) { i += 2; } else if (b < 0xF0) { i += 3; } else if (b < 0xF8) { i += 4; } else if (b < 0xFC) { i += 5; } else { i += 6; } } return len; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol) pragma solidity ^0.8.20; import {Context} from "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * The initial owner is set to the address provided by the deployer. This can * later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; /** * @dev The caller account is not authorized to perform an operation. */ error OwnableUnauthorizedAccount(address account); /** * @dev The owner is not a valid owner account. (eg. `address(0)`) */ error OwnableInvalidOwner(address owner); event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the address provided by the deployer as the initial owner. */ constructor(address initialOwner) { if (initialOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(initialOwner); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { if (owner() != _msgSender()) { revert OwnableUnauthorizedAccount(_msgSender()); } } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { if (newOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (access/Ownable2Step.sol) pragma solidity ^0.8.20; import {Ownable} from "./Ownable.sol"; /** * @dev Contract module which provides access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * This extension of the {Ownable} contract includes a two-step mechanism to transfer * ownership, where the new owner must call {acceptOwnership} in order to replace the * old one. This can help prevent common mistakes, such as transfers of ownership to * incorrect accounts, or to contracts that are unable to interact with the * permission system. * * The initial owner is specified at deployment time in the constructor for `Ownable`. This * can later be changed with {transferOwnership} and {acceptOwnership}. * * This module is used through inheritance. It will make available all functions * from parent (Ownable). */ abstract contract Ownable2Step is Ownable { address private _pendingOwner; event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner); /** * @dev Returns the address of the pending owner. */ function pendingOwner() public view virtual returns (address) { return _pendingOwner; } /** * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. * Can only be called by the current owner. * * Setting `newOwner` to the zero address is allowed; this can be used to cancel an initiated ownership transfer. */ function transferOwnership(address newOwner) public virtual override onlyOwner { _pendingOwner = newOwner; emit OwnershipTransferStarted(owner(), newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner. * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual override { delete _pendingOwner; super._transferOwnership(newOwner); } /** * @dev The new owner accepts the ownership transfer. */ function acceptOwnership() public virtual { address sender = _msgSender(); if (pendingOwner() != sender) { revert OwnableUnauthorizedAccount(sender); } _transferOwnership(sender); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (interfaces/draft-IERC6093.sol) pragma solidity ^0.8.20; /** * @dev Standard ERC-20 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 tokens. */ interface IERC20Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC20InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC20InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers. * @param spender Address that may be allowed to operate on tokens without being their owner. * @param allowance Amount of tokens a `spender` is allowed to operate with. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC20InvalidApprover(address approver); /** * @dev Indicates a failure with the `spender` to be approved. Used in approvals. * @param spender Address that may be allowed to operate on tokens without being their owner. */ error ERC20InvalidSpender(address spender); } /** * @dev Standard ERC-721 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-721 tokens. */ interface IERC721Errors { /** * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in ERC-20. * Used in balance queries. * @param owner Address of the current owner of a token. */ error ERC721InvalidOwner(address owner); /** * @dev Indicates a `tokenId` whose `owner` is the zero address. * @param tokenId Identifier number of a token. */ error ERC721NonexistentToken(uint256 tokenId); /** * @dev Indicates an error related to the ownership over a particular token. Used in transfers. * @param sender Address whose tokens are being transferred. * @param tokenId Identifier number of a token. * @param owner Address of the current owner of a token. */ error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC721InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC721InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param tokenId Identifier number of a token. */ error ERC721InsufficientApproval(address operator, uint256 tokenId); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC721InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC721InvalidOperator(address operator); } /** * @dev Standard ERC-1155 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-1155 tokens. */ interface IERC1155Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. * @param tokenId Identifier number of a token. */ error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC1155InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC1155InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param owner Address of the current owner of a token. */ error ERC1155MissingApprovalForAll(address operator, address owner); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC1155InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC1155InvalidOperator(address operator); /** * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation. * Used in batch transfers. * @param idsLength Length of the array of token identifiers * @param valuesLength Length of the array of token amounts */ error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (token/ERC721/ERC721.sol) pragma solidity ^0.8.20; import {IERC721} from "./IERC721.sol"; import {IERC721Metadata} from "./extensions/IERC721Metadata.sol"; import {ERC721Utils} from "./utils/ERC721Utils.sol"; import {Context} from "../../utils/Context.sol"; import {Strings} from "../../utils/Strings.sol"; import {IERC165, ERC165} from "../../utils/introspection/ERC165.sol"; import {IERC721Errors} from "../../interfaces/draft-IERC6093.sol"; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC-721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ abstract contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Errors { using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; mapping(uint256 tokenId => address) private _owners; mapping(address owner => uint256) private _balances; mapping(uint256 tokenId => address) private _tokenApprovals; mapping(address owner => mapping(address operator => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual returns (uint256) { if (owner == address(0)) { revert ERC721InvalidOwner(address(0)); } return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual returns (address) { return _requireOwned(tokenId); } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual returns (string memory) { _requireOwned(tokenId); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string.concat(baseURI, tokenId.toString()) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overridden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual { _approve(to, tokenId, _msgSender()); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual returns (address) { _requireOwned(tokenId); return _getApproved(tokenId); } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom(address from, address to, uint256 tokenId) public virtual { if (to == address(0)) { revert ERC721InvalidReceiver(address(0)); } // Setting an "auth" arguments enables the `_isAuthorized` check which verifies that the token exists // (from != 0). Therefore, it is not needed to verify that the return value is not 0 here. address previousOwner = _update(to, tokenId, _msgSender()); if (previousOwner != from) { revert ERC721IncorrectOwner(from, tokenId, previousOwner); } } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId) public { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual { transferFrom(from, to, tokenId); ERC721Utils.checkOnERC721Received(_msgSender(), from, to, tokenId, data); } /** * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist * * IMPORTANT: Any overrides to this function that add ownership of tokens not tracked by the * core ERC-721 logic MUST be matched with the use of {_increaseBalance} to keep balances * consistent with ownership. The invariant to preserve is that for any address `a` the value returned by * `balanceOf(a)` must be equal to the number of tokens such that `_ownerOf(tokenId)` is `a`. */ function _ownerOf(uint256 tokenId) internal view virtual returns (address) { return _owners[tokenId]; } /** * @dev Returns the approved address for `tokenId`. Returns 0 if `tokenId` is not minted. */ function _getApproved(uint256 tokenId) internal view virtual returns (address) { return _tokenApprovals[tokenId]; } /** * @dev Returns whether `spender` is allowed to manage `owner`'s tokens, or `tokenId` in * particular (ignoring whether it is owned by `owner`). * * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this * assumption. */ function _isAuthorized(address owner, address spender, uint256 tokenId) internal view virtual returns (bool) { return spender != address(0) && (owner == spender || isApprovedForAll(owner, spender) || _getApproved(tokenId) == spender); } /** * @dev Checks if `spender` can operate on `tokenId`, assuming the provided `owner` is the actual owner. * Reverts if: * - `spender` does not have approval from `owner` for `tokenId`. * - `spender` does not have approval to manage all of `owner`'s assets. * * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this * assumption. */ function _checkAuthorized(address owner, address spender, uint256 tokenId) internal view virtual { if (!_isAuthorized(owner, spender, tokenId)) { if (owner == address(0)) { revert ERC721NonexistentToken(tokenId); } else { revert ERC721InsufficientApproval(spender, tokenId); } } } /** * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override. * * NOTE: the value is limited to type(uint128).max. This protect against _balance overflow. It is unrealistic that * a uint256 would ever overflow from increments when these increments are bounded to uint128 values. * * WARNING: Increasing an account's balance using this function tends to be paired with an override of the * {_ownerOf} function to resolve the ownership of the corresponding tokens so that balances and ownership * remain consistent with one another. */ function _increaseBalance(address account, uint128 value) internal virtual { unchecked { _balances[account] += value; } } /** * @dev Transfers `tokenId` from its current owner to `to`, or alternatively mints (or burns) if the current owner * (or `to`) is the zero address. Returns the owner of the `tokenId` before the update. * * The `auth` argument is optional. If the value passed is non 0, then this function will check that * `auth` is either the owner of the token, or approved to operate on the token (by the owner). * * Emits a {Transfer} event. * * NOTE: If overriding this function in a way that tracks balances, see also {_increaseBalance}. */ function _update(address to, uint256 tokenId, address auth) internal virtual returns (address) { address from = _ownerOf(tokenId); // Perform (optional) operator check if (auth != address(0)) { _checkAuthorized(from, auth, tokenId); } // Execute the update if (from != address(0)) { // Clear approval. No need to re-authorize or emit the Approval event _approve(address(0), tokenId, address(0), false); unchecked { _balances[from] -= 1; } } if (to != address(0)) { unchecked { _balances[to] += 1; } } _owners[tokenId] = to; emit Transfer(from, to, tokenId); return from; } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal { if (to == address(0)) { revert ERC721InvalidReceiver(address(0)); } address previousOwner = _update(to, tokenId, address(0)); if (previousOwner != address(0)) { revert ERC721InvalidSender(address(0)); } } /** * @dev Mints `tokenId`, transfers it to `to` and checks for `to` acceptance. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual { _mint(to, tokenId); ERC721Utils.checkOnERC721Received(_msgSender(), address(0), to, tokenId, data); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * This is an internal function that does not check if the sender is authorized to operate on the token. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal { address previousOwner = _update(address(0), tokenId, address(0)); if (previousOwner == address(0)) { revert ERC721NonexistentToken(tokenId); } } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer(address from, address to, uint256 tokenId) internal { if (to == address(0)) { revert ERC721InvalidReceiver(address(0)); } address previousOwner = _update(to, tokenId, address(0)); if (previousOwner == address(0)) { revert ERC721NonexistentToken(tokenId); } else if (previousOwner != from) { revert ERC721IncorrectOwner(from, tokenId, previousOwner); } } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking that contract recipients * are aware of the ERC-721 standard to prevent tokens from being forever locked. * * `data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is like {safeTransferFrom} in the sense that it invokes * {IERC721Receiver-onERC721Received} on the receiver, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `tokenId` token must exist and be owned by `from`. * - `to` cannot be the zero address. * - `from` cannot be the zero address. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer(address from, address to, uint256 tokenId) internal { _safeTransfer(from, to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeTransfer-address-address-uint256-}[`_safeTransfer`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual { _transfer(from, to, tokenId); ERC721Utils.checkOnERC721Received(_msgSender(), from, to, tokenId, data); } /** * @dev Approve `to` to operate on `tokenId` * * The `auth` argument is optional. If the value passed is non 0, then this function will check that `auth` is * either the owner of the token, or approved to operate on all tokens held by this owner. * * Emits an {Approval} event. * * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument. */ function _approve(address to, uint256 tokenId, address auth) internal { _approve(to, tokenId, auth, true); } /** * @dev Variant of `_approve` with an optional flag to enable or disable the {Approval} event. The event is not * emitted in the context of transfers. */ function _approve(address to, uint256 tokenId, address auth, bool emitEvent) internal virtual { // Avoid reading the owner unless necessary if (emitEvent || auth != address(0)) { address owner = _requireOwned(tokenId); // We do not use _isAuthorized because single-token approvals should not be able to call approve if (auth != address(0) && owner != auth && !isApprovedForAll(owner, auth)) { revert ERC721InvalidApprover(auth); } if (emitEvent) { emit Approval(owner, to, tokenId); } } _tokenApprovals[tokenId] = to; } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Requirements: * - operator can't be the address zero. * * Emits an {ApprovalForAll} event. */ function _setApprovalForAll(address owner, address operator, bool approved) internal virtual { if (operator == address(0)) { revert ERC721InvalidOperator(operator); } _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Reverts if the `tokenId` doesn't have a current owner (it hasn't been minted, or it has been burned). * Returns the owner. * * Overrides to ownership logic should be done to {_ownerOf}. */ function _requireOwned(uint256 tokenId) internal view returns (address) { address owner = _ownerOf(tokenId); if (owner == address(0)) { revert ERC721NonexistentToken(tokenId); } return owner; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.20; import {IERC165} from "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC-721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon * a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC-721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or * {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon * a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC-721 * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must * understand this adds an external call which potentially creates a reentrancy vulnerability. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 tokenId) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the address zero. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.20; /** * @title ERC-721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC-721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be * reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.20; import {IERC721} from "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (token/ERC721/utils/ERC721Utils.sol) pragma solidity ^0.8.20; import {IERC721Receiver} from "../IERC721Receiver.sol"; import {IERC721Errors} from "../../../interfaces/draft-IERC6093.sol"; /** * @dev Library that provide common ERC-721 utility functions. * * See https://eips.ethereum.org/EIPS/eip-721[ERC-721]. * * _Available since v5.1._ */ library ERC721Utils { /** * @dev Performs an acceptance check for the provided `operator` by calling {IERC721-onERC721Received} * on the `to` address. The `operator` is generally the address that initiated the token transfer (i.e. `msg.sender`). * * The acceptance call is not executed and treated as a no-op if the target address doesn't contain code (i.e. an EOA). * Otherwise, the recipient must implement {IERC721Receiver-onERC721Received} and return the acceptance magic value to accept * the transfer. */ function checkOnERC721Received( address operator, address from, address to, uint256 tokenId, bytes memory data ) internal { if (to.code.length > 0) { try IERC721Receiver(to).onERC721Received(operator, from, tokenId, data) returns (bytes4 retval) { if (retval != IERC721Receiver.onERC721Received.selector) { // Token rejected revert IERC721Errors.ERC721InvalidReceiver(to); } } catch (bytes memory reason) { if (reason.length == 0) { // non-IERC721Receiver implementer revert IERC721Errors.ERC721InvalidReceiver(to); } else { assembly ("memory-safe") { revert(add(32, reason), mload(reason)) } } } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (utils/Base64.sol) pragma solidity ^0.8.20; /** * @dev Provides a set of functions to operate with Base64 strings. */ library Base64 { /** * @dev Base64 Encoding/Decoding Table * See sections 4 and 5 of https://datatracker.ietf.org/doc/html/rfc4648 */ string internal constant _TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; string internal constant _TABLE_URL = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"; /** * @dev Converts a `bytes` to its Bytes64 `string` representation. */ function encode(bytes memory data) internal pure returns (string memory) { return _encode(data, _TABLE, true); } /** * @dev Converts a `bytes` to its Bytes64Url `string` representation. * Output is not padded with `=` as specified in https://www.rfc-editor.org/rfc/rfc4648[rfc4648]. */ function encodeURL(bytes memory data) internal pure returns (string memory) { return _encode(data, _TABLE_URL, false); } /** * @dev Internal table-agnostic conversion */ function _encode(bytes memory data, string memory table, bool withPadding) private 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 ""; // If padding is enabled, the final length should be `bytes` data length divided by 3 rounded up and then // multiplied by 4 so that it leaves room for padding the last chunk // - `data.length + 2` -> Prepare for division rounding up // - `/ 3` -> Number of 3-bytes chunks (rounded up) // - `4 *` -> 4 characters for each chunk // This is equivalent to: 4 * Math.ceil(data.length / 3) // // If padding is disabled, the final length should be `bytes` data length multiplied by 4/3 rounded up as // opposed to when padding is required to fill the last chunk. // - `4 * data.length` -> 4 characters for each chunk // - ` + 2` -> Prepare for division rounding up // - `/ 3` -> Number of 3-bytes chunks (rounded up) // This is equivalent to: Math.ceil((4 * data.length) / 3) uint256 resultLength = withPadding ? 4 * ((data.length + 2) / 3) : (4 * data.length + 2) / 3; string memory result = new string(resultLength); assembly ("memory-safe") { // Prepare the lookup table (skip the first "length" byte) let tablePtr := add(table, 1) // Prepare result pointer, jump over length let resultPtr := add(result, 0x20) let dataPtr := data let endPtr := add(data, mload(data)) // In some cases, the last iteration will read bytes after the end of the data. We cache the value, and // set it to zero to make sure no dirty bytes are read in that section. let afterPtr := add(endPtr, 0x20) let afterCache := mload(afterPtr) mstore(afterPtr, 0x00) // Run over the input, 3 bytes at a time for { } lt(dataPtr, endPtr) { } { // Advance 3 bytes dataPtr := add(dataPtr, 3) let input := mload(dataPtr) // To write each character, shift the 3 byte (24 bits) chunk // 4 times in blocks of 6 bits for each character (18, 12, 6, 0) // and apply logical AND with 0x3F to bitmask the least significant 6 bits. // Use this as an index into the lookup table, mload an entire word // so the desired character is in the least significant byte, and // mstore8 this least significant byte into the result and continue. 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 } // Reset the value that was cached mstore(afterPtr, afterCache) if withPadding { // 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 v5.0.1) (utils/Context.sol) pragma solidity ^0.8.20; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (utils/Panic.sol) pragma solidity ^0.8.20; /** * @dev Helper library for emitting standardized panic codes. * * ```solidity * contract Example { * using Panic for uint256; * * // Use any of the declared internal constants * function foo() { Panic.GENERIC.panic(); } * * // Alternatively * function foo() { Panic.panic(Panic.GENERIC); } * } * ``` * * Follows the list from https://github.com/ethereum/solidity/blob/v0.8.24/libsolutil/ErrorCodes.h[libsolutil]. * * _Available since v5.1._ */ // slither-disable-next-line unused-state library Panic { /// @dev generic / unspecified error uint256 internal constant GENERIC = 0x00; /// @dev used by the assert() builtin uint256 internal constant ASSERT = 0x01; /// @dev arithmetic underflow or overflow uint256 internal constant UNDER_OVERFLOW = 0x11; /// @dev division or modulo by zero uint256 internal constant DIVISION_BY_ZERO = 0x12; /// @dev enum conversion error uint256 internal constant ENUM_CONVERSION_ERROR = 0x21; /// @dev invalid encoding in storage uint256 internal constant STORAGE_ENCODING_ERROR = 0x22; /// @dev empty array pop uint256 internal constant EMPTY_ARRAY_POP = 0x31; /// @dev array out of bounds access uint256 internal constant ARRAY_OUT_OF_BOUNDS = 0x32; /// @dev resource error (too large allocation or too large array) uint256 internal constant RESOURCE_ERROR = 0x41; /// @dev calling invalid internal function uint256 internal constant INVALID_INTERNAL_FUNCTION = 0x51; /// @dev Reverts with a panic code. Recommended to use with /// the internal constants with predefined codes. function panic(uint256 code) internal pure { assembly ("memory-safe") { mstore(0x00, 0x4e487b71) mstore(0x20, code) revert(0x1c, 0x24) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.2.0) (utils/Strings.sol) pragma solidity ^0.8.20; import {Math} from "./math/Math.sol"; import {SafeCast} from "./math/SafeCast.sol"; import {SignedMath} from "./math/SignedMath.sol"; /** * @dev String operations. */ library Strings { using SafeCast for *; bytes16 private constant HEX_DIGITS = "0123456789abcdef"; uint8 private constant ADDRESS_LENGTH = 20; /** * @dev The `value` string doesn't fit in the specified `length`. */ error StringsInsufficientHexLength(uint256 value, uint256 length); /** * @dev The string being parsed contains characters that are not in scope of the given base. */ error StringsInvalidChar(); /** * @dev The string being parsed is not a properly formatted address. */ error StringsInvalidAddressFormat(); /** * @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; assembly ("memory-safe") { ptr := add(buffer, add(32, length)) } while (true) { ptr--; assembly ("memory-safe") { mstore8(ptr, byte(mod(value, 10), HEX_DIGITS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toStringSigned(int256 value) internal pure returns (string memory) { return string.concat(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) { uint256 localValue = value; bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = HEX_DIGITS[localValue & 0xf]; localValue >>= 4; } if (localValue != 0) { revert StringsInsufficientHexLength(value, length); } 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 Converts an `address` with fixed length of 20 bytes to its checksummed ASCII `string` hexadecimal * representation, according to EIP-55. */ function toChecksumHexString(address addr) internal pure returns (string memory) { bytes memory buffer = bytes(toHexString(addr)); // hash the hex part of buffer (skip length + 2 bytes, length 40) uint256 hashValue; assembly ("memory-safe") { hashValue := shr(96, keccak256(add(buffer, 0x22), 40)) } for (uint256 i = 41; i > 1; --i) { // possible values for buffer[i] are 48 (0) to 57 (9) and 97 (a) to 102 (f) if (hashValue & 0xf > 7 && uint8(buffer[i]) > 96) { // case shift by xoring with 0x20 buffer[i] ^= 0x20; } hashValue >>= 4; } return string(buffer); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b)); } /** * @dev Parse a decimal string and returns the value as a `uint256`. * * Requirements: * - The string must be formatted as `[0-9]*` * - The result must fit into an `uint256` type */ function parseUint(string memory input) internal pure returns (uint256) { return parseUint(input, 0, bytes(input).length); } /** * @dev Variant of {parseUint} that parses a substring of `input` located between position `begin` (included) and * `end` (excluded). * * Requirements: * - The substring must be formatted as `[0-9]*` * - The result must fit into an `uint256` type */ function parseUint(string memory input, uint256 begin, uint256 end) internal pure returns (uint256) { (bool success, uint256 value) = tryParseUint(input, begin, end); if (!success) revert StringsInvalidChar(); return value; } /** * @dev Variant of {parseUint-string} that returns false if the parsing fails because of an invalid character. * * NOTE: This function will revert if the result does not fit in a `uint256`. */ function tryParseUint(string memory input) internal pure returns (bool success, uint256 value) { return _tryParseUintUncheckedBounds(input, 0, bytes(input).length); } /** * @dev Variant of {parseUint-string-uint256-uint256} that returns false if the parsing fails because of an invalid * character. * * NOTE: This function will revert if the result does not fit in a `uint256`. */ function tryParseUint( string memory input, uint256 begin, uint256 end ) internal pure returns (bool success, uint256 value) { if (end > bytes(input).length || begin > end) return (false, 0); return _tryParseUintUncheckedBounds(input, begin, end); } /** * @dev Implementation of {tryParseUint} that does not check bounds. Caller should make sure that * `begin <= end <= input.length`. Other inputs would result in undefined behavior. */ function _tryParseUintUncheckedBounds( string memory input, uint256 begin, uint256 end ) private pure returns (bool success, uint256 value) { bytes memory buffer = bytes(input); uint256 result = 0; for (uint256 i = begin; i < end; ++i) { uint8 chr = _tryParseChr(bytes1(_unsafeReadBytesOffset(buffer, i))); if (chr > 9) return (false, 0); result *= 10; result += chr; } return (true, result); } /** * @dev Parse a decimal string and returns the value as a `int256`. * * Requirements: * - The string must be formatted as `[-+]?[0-9]*` * - The result must fit in an `int256` type. */ function parseInt(string memory input) internal pure returns (int256) { return parseInt(input, 0, bytes(input).length); } /** * @dev Variant of {parseInt-string} that parses a substring of `input` located between position `begin` (included) and * `end` (excluded). * * Requirements: * - The substring must be formatted as `[-+]?[0-9]*` * - The result must fit in an `int256` type. */ function parseInt(string memory input, uint256 begin, uint256 end) internal pure returns (int256) { (bool success, int256 value) = tryParseInt(input, begin, end); if (!success) revert StringsInvalidChar(); return value; } /** * @dev Variant of {parseInt-string} that returns false if the parsing fails because of an invalid character or if * the result does not fit in a `int256`. * * NOTE: This function will revert if the absolute value of the result does not fit in a `uint256`. */ function tryParseInt(string memory input) internal pure returns (bool success, int256 value) { return _tryParseIntUncheckedBounds(input, 0, bytes(input).length); } uint256 private constant ABS_MIN_INT256 = 2 ** 255; /** * @dev Variant of {parseInt-string-uint256-uint256} that returns false if the parsing fails because of an invalid * character or if the result does not fit in a `int256`. * * NOTE: This function will revert if the absolute value of the result does not fit in a `uint256`. */ function tryParseInt( string memory input, uint256 begin, uint256 end ) internal pure returns (bool success, int256 value) { if (end > bytes(input).length || begin > end) return (false, 0); return _tryParseIntUncheckedBounds(input, begin, end); } /** * @dev Implementation of {tryParseInt} that does not check bounds. Caller should make sure that * `begin <= end <= input.length`. Other inputs would result in undefined behavior. */ function _tryParseIntUncheckedBounds( string memory input, uint256 begin, uint256 end ) private pure returns (bool success, int256 value) { bytes memory buffer = bytes(input); // Check presence of a negative sign. bytes1 sign = begin == end ? bytes1(0) : bytes1(_unsafeReadBytesOffset(buffer, begin)); // don't do out-of-bound (possibly unsafe) read if sub-string is empty bool positiveSign = sign == bytes1("+"); bool negativeSign = sign == bytes1("-"); uint256 offset = (positiveSign || negativeSign).toUint(); (bool absSuccess, uint256 absValue) = tryParseUint(input, begin + offset, end); if (absSuccess && absValue < ABS_MIN_INT256) { return (true, negativeSign ? -int256(absValue) : int256(absValue)); } else if (absSuccess && negativeSign && absValue == ABS_MIN_INT256) { return (true, type(int256).min); } else return (false, 0); } /** * @dev Parse a hexadecimal string (with or without "0x" prefix), and returns the value as a `uint256`. * * Requirements: * - The string must be formatted as `(0x)?[0-9a-fA-F]*` * - The result must fit in an `uint256` type. */ function parseHexUint(string memory input) internal pure returns (uint256) { return parseHexUint(input, 0, bytes(input).length); } /** * @dev Variant of {parseHexUint} that parses a substring of `input` located between position `begin` (included) and * `end` (excluded). * * Requirements: * - The substring must be formatted as `(0x)?[0-9a-fA-F]*` * - The result must fit in an `uint256` type. */ function parseHexUint(string memory input, uint256 begin, uint256 end) internal pure returns (uint256) { (bool success, uint256 value) = tryParseHexUint(input, begin, end); if (!success) revert StringsInvalidChar(); return value; } /** * @dev Variant of {parseHexUint-string} that returns false if the parsing fails because of an invalid character. * * NOTE: This function will revert if the result does not fit in a `uint256`. */ function tryParseHexUint(string memory input) internal pure returns (bool success, uint256 value) { return _tryParseHexUintUncheckedBounds(input, 0, bytes(input).length); } /** * @dev Variant of {parseHexUint-string-uint256-uint256} that returns false if the parsing fails because of an * invalid character. * * NOTE: This function will revert if the result does not fit in a `uint256`. */ function tryParseHexUint( string memory input, uint256 begin, uint256 end ) internal pure returns (bool success, uint256 value) { if (end > bytes(input).length || begin > end) return (false, 0); return _tryParseHexUintUncheckedBounds(input, begin, end); } /** * @dev Implementation of {tryParseHexUint} that does not check bounds. Caller should make sure that * `begin <= end <= input.length`. Other inputs would result in undefined behavior. */ function _tryParseHexUintUncheckedBounds( string memory input, uint256 begin, uint256 end ) private pure returns (bool success, uint256 value) { bytes memory buffer = bytes(input); // skip 0x prefix if present bool hasPrefix = (end > begin + 1) && bytes2(_unsafeReadBytesOffset(buffer, begin)) == bytes2("0x"); // don't do out-of-bound (possibly unsafe) read if sub-string is empty uint256 offset = hasPrefix.toUint() * 2; uint256 result = 0; for (uint256 i = begin + offset; i < end; ++i) { uint8 chr = _tryParseChr(bytes1(_unsafeReadBytesOffset(buffer, i))); if (chr > 15) return (false, 0); result *= 16; unchecked { // Multiplying by 16 is equivalent to a shift of 4 bits (with additional overflow check). // This guaratees that adding a value < 16 will not cause an overflow, hence the unchecked. result += chr; } } return (true, result); } /** * @dev Parse a hexadecimal string (with or without "0x" prefix), and returns the value as an `address`. * * Requirements: * - The string must be formatted as `(0x)?[0-9a-fA-F]{40}` */ function parseAddress(string memory input) internal pure returns (address) { return parseAddress(input, 0, bytes(input).length); } /** * @dev Variant of {parseAddress} that parses a substring of `input` located between position `begin` (included) and * `end` (excluded). * * Requirements: * - The substring must be formatted as `(0x)?[0-9a-fA-F]{40}` */ function parseAddress(string memory input, uint256 begin, uint256 end) internal pure returns (address) { (bool success, address value) = tryParseAddress(input, begin, end); if (!success) revert StringsInvalidAddressFormat(); return value; } /** * @dev Variant of {parseAddress-string} that returns false if the parsing fails because the input is not a properly * formatted address. See {parseAddress} requirements. */ function tryParseAddress(string memory input) internal pure returns (bool success, address value) { return tryParseAddress(input, 0, bytes(input).length); } /** * @dev Variant of {parseAddress-string-uint256-uint256} that returns false if the parsing fails because input is not a properly * formatted address. See {parseAddress} requirements. */ function tryParseAddress( string memory input, uint256 begin, uint256 end ) internal pure returns (bool success, address value) { if (end > bytes(input).length || begin > end) return (false, address(0)); bool hasPrefix = (end > begin + 1) && bytes2(_unsafeReadBytesOffset(bytes(input), begin)) == bytes2("0x"); // don't do out-of-bound (possibly unsafe) read if sub-string is empty uint256 expectedLength = 40 + hasPrefix.toUint() * 2; // check that input is the correct length if (end - begin == expectedLength) { // length guarantees that this does not overflow, and value is at most type(uint160).max (bool s, uint256 v) = _tryParseHexUintUncheckedBounds(input, begin, end); return (s, address(uint160(v))); } else { return (false, address(0)); } } function _tryParseChr(bytes1 chr) private pure returns (uint8) { uint8 value = uint8(chr); // Try to parse `chr`: // - Case 1: [0-9] // - Case 2: [a-f] // - Case 3: [A-F] // - otherwise not supported unchecked { if (value > 47 && value < 58) value -= 48; else if (value > 96 && value < 103) value -= 87; else if (value > 64 && value < 71) value -= 55; else return type(uint8).max; } return value; } /** * @dev Reads a bytes32 from a bytes array without bounds checking. * * NOTE: making this function internal would mean it could be used with memory unsafe offset, and marking the * assembly block as such would prevent some optimizations. */ function _unsafeReadBytesOffset(bytes memory buffer, uint256 offset) private pure returns (bytes32 value) { // This is not memory safe in the general case, but all calls to this private function are within bounds. assembly ("memory-safe") { value := mload(add(buffer, add(0x20, offset))) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (utils/introspection/ERC165.sol) pragma solidity ^0.8.20; import {IERC165} from "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC-165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (utils/introspection/IERC165.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC-165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[ERC]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (utils/math/Math.sol) pragma solidity ^0.8.20; import {Panic} from "../Panic.sol"; import {SafeCast} from "./SafeCast.sol"; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Floor, // Toward negative infinity Ceil, // Toward positive infinity Trunc, // Toward zero Expand // Away from zero } /** * @dev Returns the addition of two unsigned integers, with an success flag (no overflow). */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the subtraction of two unsigned integers, with an success flag (no overflow). */ function trySub(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an success flag (no overflow). */ function tryMul(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a success flag (no division by zero). */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a success flag (no division by zero). */ function tryMod(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Branchless ternary evaluation for `a ? b : c`. Gas costs are constant. * * IMPORTANT: This function may reduce bytecode size and consume less gas when used standalone. * However, the compiler may optimize Solidity ternary operations (i.e. `a ? b : c`) to only compute * one branch when needed, making this function more expensive. */ function ternary(bool condition, uint256 a, uint256 b) internal pure returns (uint256) { unchecked { // branchless ternary works because: // b ^ (a ^ b) == a // b ^ 0 == b return b ^ ((a ^ b) * SafeCast.toUint(condition)); } } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return ternary(a > b, a, b); } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return ternary(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 towards infinity instead * of rounding towards zero. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { if (b == 0) { // Guarantee the same behavior as in a regular Solidity division. Panic.panic(Panic.DIVISION_BY_ZERO); } // The following calculation ensures accurate ceiling division without overflow. // Since a is non-zero, (a - 1) / b will not overflow. // The largest possible result occurs when (a - 1) / b is type(uint256).max, // but the largest value we can obtain is type(uint256).max - 1, which happens // when a = type(uint256).max and b = 1. unchecked { return SafeCast.toUint(a > 0) * ((a - 1) / b + 1); } } /** * @dev Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or * denominator == 0. * * 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 2²56 and mod 2²56 - 1, then use // the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2²56 + prod0. uint256 prod0 = x * y; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) 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 2²56. Also prevents denominator == 0. if (denominator <= prod1) { Panic.panic(ternary(denominator == 0, Panic.DIVISION_BY_ZERO, Panic.UNDER_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. uint256 twos = denominator & (0 - denominator); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2²56 / 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 2²56. Now that denominator is an odd number, it has an inverse modulo 2²56 such // that denominator * inv = 1 mod 2²56. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 24. 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 28 inverse *= 2 - denominator * inverse; // inverse mod 2¹6 inverse *= 2 - denominator * inverse; // inverse mod 2³² inverse *= 2 - denominator * inverse; // inverse mod 264 inverse *= 2 - denominator * inverse; // inverse mod 2¹²8 inverse *= 2 - denominator * inverse; // inverse mod 2²56 // 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 2²56. Since the preconditions guarantee that the outcome is // less than 2²56, 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; } } /** * @dev 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) { return mulDiv(x, y, denominator) + SafeCast.toUint(unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0); } /** * @dev Calculate the modular multiplicative inverse of a number in Z/nZ. * * If n is a prime, then Z/nZ is a field. In that case all elements are inversible, except 0. * If n is not a prime, then Z/nZ is not a field, and some elements might not be inversible. * * If the input value is not inversible, 0 is returned. * * NOTE: If you know for sure that n is (big) a prime, it may be cheaper to use Fermat's little theorem and get the * inverse using `Math.modExp(a, n - 2, n)`. See {invModPrime}. */ function invMod(uint256 a, uint256 n) internal pure returns (uint256) { unchecked { if (n == 0) return 0; // The inverse modulo is calculated using the Extended Euclidean Algorithm (iterative version) // Used to compute integers x and y such that: ax + ny = gcd(a, n). // When the gcd is 1, then the inverse of a modulo n exists and it's x. // ax + ny = 1 // ax = 1 + (-y)n // ax = 1 (mod n) # x is the inverse of a modulo n // If the remainder is 0 the gcd is n right away. uint256 remainder = a % n; uint256 gcd = n; // Therefore the initial coefficients are: // ax + ny = gcd(a, n) = n // 0a + 1n = n int256 x = 0; int256 y = 1; while (remainder != 0) { uint256 quotient = gcd / remainder; (gcd, remainder) = ( // The old remainder is the next gcd to try. remainder, // Compute the next remainder. // Can't overflow given that (a % gcd) * (gcd // (a % gcd)) <= gcd // where gcd is at most n (capped to type(uint256).max) gcd - remainder * quotient ); (x, y) = ( // Increment the coefficient of a. y, // Decrement the coefficient of n. // Can overflow, but the result is casted to uint256 so that the // next value of y is "wrapped around" to a value between 0 and n - 1. x - y * int256(quotient) ); } if (gcd != 1) return 0; // No inverse exists. return ternary(x < 0, n - uint256(-x), uint256(x)); // Wrap the result if it's negative. } } /** * @dev Variant of {invMod}. More efficient, but only works if `p` is known to be a prime greater than `2`. * * From https://en.wikipedia.org/wiki/Fermat%27s_little_theorem[Fermat's little theorem], we know that if p is * prime, then `a**(p-1) = 1 mod p`. As a consequence, we have `a * a**(p-2) = 1 mod p`, which means that * `a**(p-2)` is the modular multiplicative inverse of a in Fp. * * NOTE: this function does NOT check that `p` is a prime greater than `2`. */ function invModPrime(uint256 a, uint256 p) internal view returns (uint256) { unchecked { return Math.modExp(a, p - 2, p); } } /** * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m) * * Requirements: * - modulus can't be zero * - underlying staticcall to precompile must succeed * * IMPORTANT: The result is only valid if the underlying call succeeds. When using this function, make * sure the chain you're using it on supports the precompiled contract for modular exponentiation * at address 0x05 as specified in https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise, * the underlying function will succeed given the lack of a revert, but the result may be incorrectly * interpreted as 0. */ function modExp(uint256 b, uint256 e, uint256 m) internal view returns (uint256) { (bool success, uint256 result) = tryModExp(b, e, m); if (!success) { Panic.panic(Panic.DIVISION_BY_ZERO); } return result; } /** * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m). * It includes a success flag indicating if the operation succeeded. Operation will be marked as failed if trying * to operate modulo 0 or if the underlying precompile reverted. * * IMPORTANT: The result is only valid if the success flag is true. When using this function, make sure the chain * you're using it on supports the precompiled contract for modular exponentiation at address 0x05 as specified in * https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise, the underlying function will succeed given the lack * of a revert, but the result may be incorrectly interpreted as 0. */ function tryModExp(uint256 b, uint256 e, uint256 m) internal view returns (bool success, uint256 result) { if (m == 0) return (false, 0); assembly ("memory-safe") { let ptr := mload(0x40) // | Offset | Content | Content (Hex) | // |-----------|------------|--------------------------------------------------------------------| // | 0x00:0x1f | size of b | 0x0000000000000000000000000000000000000000000000000000000000000020 | // | 0x20:0x3f | size of e | 0x0000000000000000000000000000000000000000000000000000000000000020 | // | 0x40:0x5f | size of m | 0x0000000000000000000000000000000000000000000000000000000000000020 | // | 0x60:0x7f | value of b | 0x<.............................................................b> | // | 0x80:0x9f | value of e | 0x<.............................................................e> | // | 0xa0:0xbf | value of m | 0x<.............................................................m> | mstore(ptr, 0x20) mstore(add(ptr, 0x20), 0x20) mstore(add(ptr, 0x40), 0x20) mstore(add(ptr, 0x60), b) mstore(add(ptr, 0x80), e) mstore(add(ptr, 0xa0), m) // Given the result < m, it's guaranteed to fit in 32 bytes, // so we can use the memory scratch space located at offset 0. success := staticcall(gas(), 0x05, ptr, 0xc0, 0x00, 0x20) result := mload(0x00) } } /** * @dev Variant of {modExp} that supports inputs of arbitrary length. */ function modExp(bytes memory b, bytes memory e, bytes memory m) internal view returns (bytes memory) { (bool success, bytes memory result) = tryModExp(b, e, m); if (!success) { Panic.panic(Panic.DIVISION_BY_ZERO); } return result; } /** * @dev Variant of {tryModExp} that supports inputs of arbitrary length. */ function tryModExp( bytes memory b, bytes memory e, bytes memory m ) internal view returns (bool success, bytes memory result) { if (_zeroBytes(m)) return (false, new bytes(0)); uint256 mLen = m.length; // Encode call args in result and move the free memory pointer result = abi.encodePacked(b.length, e.length, mLen, b, e, m); assembly ("memory-safe") { let dataPtr := add(result, 0x20) // Write result on top of args to avoid allocating extra memory. success := staticcall(gas(), 0x05, dataPtr, mload(result), dataPtr, mLen) // Overwrite the length. // result.length > returndatasize() is guaranteed because returndatasize() == m.length mstore(result, mLen) // Set the memory pointer after the returned data. mstore(0x40, add(dataPtr, mLen)) } } /** * @dev Returns whether the provided byte array is zero. */ function _zeroBytes(bytes memory byteArray) private pure returns (bool) { for (uint256 i = 0; i < byteArray.length; ++i) { if (byteArray[i] != 0) { return false; } } return true; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded * towards zero. * * This method is based on Newton's method for computing square roots; the algorithm is restricted to only * using integer operations. */ function sqrt(uint256 a) internal pure returns (uint256) { unchecked { // Take care of easy edge cases when a == 0 or a == 1 if (a <= 1) { return a; } // In this function, we use Newton's method to get a root of `f(x) := x² - a`. It involves building a // sequence x_n that converges toward sqrt(a). For each iteration x_n, we also define the error between // the current value as `e_n = | x_n - sqrt(a) |`. // // For our first estimation, we consider `e` the smallest power of 2 which is bigger than the square root // of the target. (i.e. `2**(e-1) = sqrt(a) < 2**e`). We know that `e = 128` because `(2¹²8)² = 2²56` is // bigger than any uint256. // // By noticing that // `2**(e-1) = sqrt(a) < 2**e ? (2**(e-1))² = a < (2**e)² ? 2**(2*e-2) = a < 2**(2*e)` // we can deduce that `e - 1` is `log2(a) / 2`. We can thus compute `x_n = 2**(e-1)` using a method similar // to the msb function. uint256 aa = a; uint256 xn = 1; if (aa >= (1 << 128)) { aa >>= 128; xn <<= 64; } if (aa >= (1 << 64)) { aa >>= 64; xn <<= 32; } if (aa >= (1 << 32)) { aa >>= 32; xn <<= 16; } if (aa >= (1 << 16)) { aa >>= 16; xn <<= 8; } if (aa >= (1 << 8)) { aa >>= 8; xn <<= 4; } if (aa >= (1 << 4)) { aa >>= 4; xn <<= 2; } if (aa >= (1 << 2)) { xn <<= 1; } // We now have x_n such that `x_n = 2**(e-1) = sqrt(a) < 2**e = 2 * x_n`. This implies e_n = 2**(e-1). // // We can refine our estimation by noticing that the middle of that interval minimizes the error. // If we move x_n to equal 2**(e-1) + 2**(e-2), then we reduce the error to e_n = 2**(e-2). // This is going to be our x_0 (and e_0) xn = (3 * xn) >> 1; // e_0 := | x_0 - sqrt(a) | = 2**(e-2) // From here, Newton's method give us: // x_{n+1} = (x_n + a / x_n) / 2 // // One should note that: // x_{n+1}² - a = ((x_n + a / x_n) / 2)² - a // = ((x_n² + a) / (2 * x_n))² - a // = (x_n4 + 2 * a * x_n² + a²) / (4 * x_n²) - a // = (x_n4 + 2 * a * x_n² + a² - 4 * a * x_n²) / (4 * x_n²) // = (x_n4 - 2 * a * x_n² + a²) / (4 * x_n²) // = (x_n² - a)² / (2 * x_n)² // = ((x_n² - a) / (2 * x_n))² // = 0 // Which proves that for all n = 1, sqrt(a) = x_n // // This gives us the proof of quadratic convergence of the sequence: // e_{n+1} = | x_{n+1} - sqrt(a) | // = | (x_n + a / x_n) / 2 - sqrt(a) | // = | (x_n² + a - 2*x_n*sqrt(a)) / (2 * x_n) | // = | (x_n - sqrt(a))² / (2 * x_n) | // = | e_n² / (2 * x_n) | // = e_n² / | (2 * x_n) | // // For the first iteration, we have a special case where x_0 is known: // e_1 = e_0² / | (2 * x_0) | // = (2**(e-2))² / (2 * (2**(e-1) + 2**(e-2))) // = 2**(2*e-4) / (3 * 2**(e-1)) // = 2**(e-3) / 3 // = 2**(e-3-log2(3)) // = 2**(e-4.5) // // For the following iterations, we use the fact that, 2**(e-1) = sqrt(a) = x_n: // e_{n+1} = e_n² / | (2 * x_n) | // = (2**(e-k))² / (2 * 2**(e-1)) // = 2**(2*e-2*k) / 2**e // = 2**(e-2*k) xn = (xn + a / xn) >> 1; // e_1 := | x_1 - sqrt(a) | = 2**(e-4.5) -- special case, see above xn = (xn + a / xn) >> 1; // e_2 := | x_2 - sqrt(a) | = 2**(e-9) -- general case with k = 4.5 xn = (xn + a / xn) >> 1; // e_3 := | x_3 - sqrt(a) | = 2**(e-18) -- general case with k = 9 xn = (xn + a / xn) >> 1; // e_4 := | x_4 - sqrt(a) | = 2**(e-36) -- general case with k = 18 xn = (xn + a / xn) >> 1; // e_5 := | x_5 - sqrt(a) | = 2**(e-72) -- general case with k = 36 xn = (xn + a / xn) >> 1; // e_6 := | x_6 - sqrt(a) | = 2**(e-144) -- general case with k = 72 // Because e = 128 (as discussed during the first estimation phase), we know have reached a precision // e_6 = 2**(e-144) < 1. Given we're operating on integers, then we can ensure that xn is now either // sqrt(a) or sqrt(a) + 1. return xn - SafeCast.toUint(xn > a / xn); } } /** * @dev 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 + SafeCast.toUint(unsignedRoundsUp(rounding) && result * result < a); } } /** * @dev Return the log in base 2 of a positive value rounded towards zero. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; uint256 exp; unchecked { exp = 128 * SafeCast.toUint(value > (1 << 128) - 1); value >>= exp; result += exp; exp = 64 * SafeCast.toUint(value > (1 << 64) - 1); value >>= exp; result += exp; exp = 32 * SafeCast.toUint(value > (1 << 32) - 1); value >>= exp; result += exp; exp = 16 * SafeCast.toUint(value > (1 << 16) - 1); value >>= exp; result += exp; exp = 8 * SafeCast.toUint(value > (1 << 8) - 1); value >>= exp; result += exp; exp = 4 * SafeCast.toUint(value > (1 << 4) - 1); value >>= exp; result += exp; exp = 2 * SafeCast.toUint(value > (1 << 2) - 1); value >>= exp; result += exp; result += SafeCast.toUint(value > 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 + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << result < value); } } /** * @dev Return the log in base 10 of a positive value rounded towards zero. * 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 + SafeCast.toUint(unsignedRoundsUp(rounding) && 10 ** result < value); } } /** * @dev Return the log in base 256 of a positive value rounded towards zero. * 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; uint256 isGt; unchecked { isGt = SafeCast.toUint(value > (1 << 128) - 1); value >>= isGt * 128; result += isGt * 16; isGt = SafeCast.toUint(value > (1 << 64) - 1); value >>= isGt * 64; result += isGt * 8; isGt = SafeCast.toUint(value > (1 << 32) - 1); value >>= isGt * 32; result += isGt * 4; isGt = SafeCast.toUint(value > (1 << 16) - 1); value >>= isGt * 16; result += isGt * 2; result += SafeCast.toUint(value > (1 << 8) - 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 + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << (result << 3) < value); } } /** * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers. */ function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) { return uint8(rounding) % 2 == 1; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (utils/math/SafeCast.sol) // This file was procedurally generated from scripts/generate/templates/SafeCast.js. pragma solidity ^0.8.20; /** * @dev Wrappers over Solidity's uintXX/intXX/bool casting operators with added overflow * checks. * * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can * easily result in undesired exploitation or bugs, since developers usually * assume that overflows raise errors. `SafeCast` restores this intuition by * reverting the transaction when such an operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeCast { /** * @dev Value doesn't fit in an uint of `bits` size. */ error SafeCastOverflowedUintDowncast(uint8 bits, uint256 value); /** * @dev An int value doesn't fit in an uint of `bits` size. */ error SafeCastOverflowedIntToUint(int256 value); /** * @dev Value doesn't fit in an int of `bits` size. */ error SafeCastOverflowedIntDowncast(uint8 bits, int256 value); /** * @dev An uint value doesn't fit in an int of `bits` size. */ error SafeCastOverflowedUintToInt(uint256 value); /** * @dev Returns the downcasted uint248 from uint256, reverting on * overflow (when the input is greater than largest uint248). * * Counterpart to Solidity's `uint248` operator. * * Requirements: * * - input must fit into 248 bits */ function toUint248(uint256 value) internal pure returns (uint248) { if (value > type(uint248).max) { revert SafeCastOverflowedUintDowncast(248, value); } return uint248(value); } /** * @dev Returns the downcasted uint240 from uint256, reverting on * overflow (when the input is greater than largest uint240). * * Counterpart to Solidity's `uint240` operator. * * Requirements: * * - input must fit into 240 bits */ function toUint240(uint256 value) internal pure returns (uint240) { if (value > type(uint240).max) { revert SafeCastOverflowedUintDowncast(240, value); } return uint240(value); } /** * @dev Returns the downcasted uint232 from uint256, reverting on * overflow (when the input is greater than largest uint232). * * Counterpart to Solidity's `uint232` operator. * * Requirements: * * - input must fit into 232 bits */ function toUint232(uint256 value) internal pure returns (uint232) { if (value > type(uint232).max) { revert SafeCastOverflowedUintDowncast(232, value); } return uint232(value); } /** * @dev Returns the downcasted uint224 from uint256, reverting on * overflow (when the input is greater than largest uint224). * * Counterpart to Solidity's `uint224` operator. * * Requirements: * * - input must fit into 224 bits */ function toUint224(uint256 value) internal pure returns (uint224) { if (value > type(uint224).max) { revert SafeCastOverflowedUintDowncast(224, value); } return uint224(value); } /** * @dev Returns the downcasted uint216 from uint256, reverting on * overflow (when the input is greater than largest uint216). * * Counterpart to Solidity's `uint216` operator. * * Requirements: * * - input must fit into 216 bits */ function toUint216(uint256 value) internal pure returns (uint216) { if (value > type(uint216).max) { revert SafeCastOverflowedUintDowncast(216, value); } return uint216(value); } /** * @dev Returns the downcasted uint208 from uint256, reverting on * overflow (when the input is greater than largest uint208). * * Counterpart to Solidity's `uint208` operator. * * Requirements: * * - input must fit into 208 bits */ function toUint208(uint256 value) internal pure returns (uint208) { if (value > type(uint208).max) { revert SafeCastOverflowedUintDowncast(208, value); } return uint208(value); } /** * @dev Returns the downcasted uint200 from uint256, reverting on * overflow (when the input is greater than largest uint200). * * Counterpart to Solidity's `uint200` operator. * * Requirements: * * - input must fit into 200 bits */ function toUint200(uint256 value) internal pure returns (uint200) { if (value > type(uint200).max) { revert SafeCastOverflowedUintDowncast(200, value); } return uint200(value); } /** * @dev Returns the downcasted uint192 from uint256, reverting on * overflow (when the input is greater than largest uint192). * * Counterpart to Solidity's `uint192` operator. * * Requirements: * * - input must fit into 192 bits */ function toUint192(uint256 value) internal pure returns (uint192) { if (value > type(uint192).max) { revert SafeCastOverflowedUintDowncast(192, value); } return uint192(value); } /** * @dev Returns the downcasted uint184 from uint256, reverting on * overflow (when the input is greater than largest uint184). * * Counterpart to Solidity's `uint184` operator. * * Requirements: * * - input must fit into 184 bits */ function toUint184(uint256 value) internal pure returns (uint184) { if (value > type(uint184).max) { revert SafeCastOverflowedUintDowncast(184, value); } return uint184(value); } /** * @dev Returns the downcasted uint176 from uint256, reverting on * overflow (when the input is greater than largest uint176). * * Counterpart to Solidity's `uint176` operator. * * Requirements: * * - input must fit into 176 bits */ function toUint176(uint256 value) internal pure returns (uint176) { if (value > type(uint176).max) { revert SafeCastOverflowedUintDowncast(176, value); } return uint176(value); } /** * @dev Returns the downcasted uint168 from uint256, reverting on * overflow (when the input is greater than largest uint168). * * Counterpart to Solidity's `uint168` operator. * * Requirements: * * - input must fit into 168 bits */ function toUint168(uint256 value) internal pure returns (uint168) { if (value > type(uint168).max) { revert SafeCastOverflowedUintDowncast(168, value); } return uint168(value); } /** * @dev Returns the downcasted uint160 from uint256, reverting on * overflow (when the input is greater than largest uint160). * * Counterpart to Solidity's `uint160` operator. * * Requirements: * * - input must fit into 160 bits */ function toUint160(uint256 value) internal pure returns (uint160) { if (value > type(uint160).max) { revert SafeCastOverflowedUintDowncast(160, value); } return uint160(value); } /** * @dev Returns the downcasted uint152 from uint256, reverting on * overflow (when the input is greater than largest uint152). * * Counterpart to Solidity's `uint152` operator. * * Requirements: * * - input must fit into 152 bits */ function toUint152(uint256 value) internal pure returns (uint152) { if (value > type(uint152).max) { revert SafeCastOverflowedUintDowncast(152, value); } return uint152(value); } /** * @dev Returns the downcasted uint144 from uint256, reverting on * overflow (when the input is greater than largest uint144). * * Counterpart to Solidity's `uint144` operator. * * Requirements: * * - input must fit into 144 bits */ function toUint144(uint256 value) internal pure returns (uint144) { if (value > type(uint144).max) { revert SafeCastOverflowedUintDowncast(144, value); } return uint144(value); } /** * @dev Returns the downcasted uint136 from uint256, reverting on * overflow (when the input is greater than largest uint136). * * Counterpart to Solidity's `uint136` operator. * * Requirements: * * - input must fit into 136 bits */ function toUint136(uint256 value) internal pure returns (uint136) { if (value > type(uint136).max) { revert SafeCastOverflowedUintDowncast(136, value); } return uint136(value); } /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits */ function toUint128(uint256 value) internal pure returns (uint128) { if (value > type(uint128).max) { revert SafeCastOverflowedUintDowncast(128, value); } return uint128(value); } /** * @dev Returns the downcasted uint120 from uint256, reverting on * overflow (when the input is greater than largest uint120). * * Counterpart to Solidity's `uint120` operator. * * Requirements: * * - input must fit into 120 bits */ function toUint120(uint256 value) internal pure returns (uint120) { if (value > type(uint120).max) { revert SafeCastOverflowedUintDowncast(120, value); } return uint120(value); } /** * @dev Returns the downcasted uint112 from uint256, reverting on * overflow (when the input is greater than largest uint112). * * Counterpart to Solidity's `uint112` operator. * * Requirements: * * - input must fit into 112 bits */ function toUint112(uint256 value) internal pure returns (uint112) { if (value > type(uint112).max) { revert SafeCastOverflowedUintDowncast(112, value); } return uint112(value); } /** * @dev Returns the downcasted uint104 from uint256, reverting on * overflow (when the input is greater than largest uint104). * * Counterpart to Solidity's `uint104` operator. * * Requirements: * * - input must fit into 104 bits */ function toUint104(uint256 value) internal pure returns (uint104) { if (value > type(uint104).max) { revert SafeCastOverflowedUintDowncast(104, value); } return uint104(value); } /** * @dev Returns the downcasted uint96 from uint256, reverting on * overflow (when the input is greater than largest uint96). * * Counterpart to Solidity's `uint96` operator. * * Requirements: * * - input must fit into 96 bits */ function toUint96(uint256 value) internal pure returns (uint96) { if (value > type(uint96).max) { revert SafeCastOverflowedUintDowncast(96, value); } return uint96(value); } /** * @dev Returns the downcasted uint88 from uint256, reverting on * overflow (when the input is greater than largest uint88). * * Counterpart to Solidity's `uint88` operator. * * Requirements: * * - input must fit into 88 bits */ function toUint88(uint256 value) internal pure returns (uint88) { if (value > type(uint88).max) { revert SafeCastOverflowedUintDowncast(88, value); } return uint88(value); } /** * @dev Returns the downcasted uint80 from uint256, reverting on * overflow (when the input is greater than largest uint80). * * Counterpart to Solidity's `uint80` operator. * * Requirements: * * - input must fit into 80 bits */ function toUint80(uint256 value) internal pure returns (uint80) { if (value > type(uint80).max) { revert SafeCastOverflowedUintDowncast(80, value); } return uint80(value); } /** * @dev Returns the downcasted uint72 from uint256, reverting on * overflow (when the input is greater than largest uint72). * * Counterpart to Solidity's `uint72` operator. * * Requirements: * * - input must fit into 72 bits */ function toUint72(uint256 value) internal pure returns (uint72) { if (value > type(uint72).max) { revert SafeCastOverflowedUintDowncast(72, value); } return uint72(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits */ function toUint64(uint256 value) internal pure returns (uint64) { if (value > type(uint64).max) { revert SafeCastOverflowedUintDowncast(64, value); } return uint64(value); } /** * @dev Returns the downcasted uint56 from uint256, reverting on * overflow (when the input is greater than largest uint56). * * Counterpart to Solidity's `uint56` operator. * * Requirements: * * - input must fit into 56 bits */ function toUint56(uint256 value) internal pure returns (uint56) { if (value > type(uint56).max) { revert SafeCastOverflowedUintDowncast(56, value); } return uint56(value); } /** * @dev Returns the downcasted uint48 from uint256, reverting on * overflow (when the input is greater than largest uint48). * * Counterpart to Solidity's `uint48` operator. * * Requirements: * * - input must fit into 48 bits */ function toUint48(uint256 value) internal pure returns (uint48) { if (value > type(uint48).max) { revert SafeCastOverflowedUintDowncast(48, value); } return uint48(value); } /** * @dev Returns the downcasted uint40 from uint256, reverting on * overflow (when the input is greater than largest uint40). * * Counterpart to Solidity's `uint40` operator. * * Requirements: * * - input must fit into 40 bits */ function toUint40(uint256 value) internal pure returns (uint40) { if (value > type(uint40).max) { revert SafeCastOverflowedUintDowncast(40, value); } return uint40(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits */ function toUint32(uint256 value) internal pure returns (uint32) { if (value > type(uint32).max) { revert SafeCastOverflowedUintDowncast(32, value); } return uint32(value); } /** * @dev Returns the downcasted uint24 from uint256, reverting on * overflow (when the input is greater than largest uint24). * * Counterpart to Solidity's `uint24` operator. * * Requirements: * * - input must fit into 24 bits */ function toUint24(uint256 value) internal pure returns (uint24) { if (value > type(uint24).max) { revert SafeCastOverflowedUintDowncast(24, value); } return uint24(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits */ function toUint16(uint256 value) internal pure returns (uint16) { if (value > type(uint16).max) { revert SafeCastOverflowedUintDowncast(16, value); } return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits */ function toUint8(uint256 value) internal pure returns (uint8) { if (value > type(uint8).max) { revert SafeCastOverflowedUintDowncast(8, value); } return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. */ function toUint256(int256 value) internal pure returns (uint256) { if (value < 0) { revert SafeCastOverflowedIntToUint(value); } return uint256(value); } /** * @dev Returns the downcasted int248 from int256, reverting on * overflow (when the input is less than smallest int248 or * greater than largest int248). * * Counterpart to Solidity's `int248` operator. * * Requirements: * * - input must fit into 248 bits */ function toInt248(int256 value) internal pure returns (int248 downcasted) { downcasted = int248(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(248, value); } } /** * @dev Returns the downcasted int240 from int256, reverting on * overflow (when the input is less than smallest int240 or * greater than largest int240). * * Counterpart to Solidity's `int240` operator. * * Requirements: * * - input must fit into 240 bits */ function toInt240(int256 value) internal pure returns (int240 downcasted) { downcasted = int240(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(240, value); } } /** * @dev Returns the downcasted int232 from int256, reverting on * overflow (when the input is less than smallest int232 or * greater than largest int232). * * Counterpart to Solidity's `int232` operator. * * Requirements: * * - input must fit into 232 bits */ function toInt232(int256 value) internal pure returns (int232 downcasted) { downcasted = int232(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(232, value); } } /** * @dev Returns the downcasted int224 from int256, reverting on * overflow (when the input is less than smallest int224 or * greater than largest int224). * * Counterpart to Solidity's `int224` operator. * * Requirements: * * - input must fit into 224 bits */ function toInt224(int256 value) internal pure returns (int224 downcasted) { downcasted = int224(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(224, value); } } /** * @dev Returns the downcasted int216 from int256, reverting on * overflow (when the input is less than smallest int216 or * greater than largest int216). * * Counterpart to Solidity's `int216` operator. * * Requirements: * * - input must fit into 216 bits */ function toInt216(int256 value) internal pure returns (int216 downcasted) { downcasted = int216(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(216, value); } } /** * @dev Returns the downcasted int208 from int256, reverting on * overflow (when the input is less than smallest int208 or * greater than largest int208). * * Counterpart to Solidity's `int208` operator. * * Requirements: * * - input must fit into 208 bits */ function toInt208(int256 value) internal pure returns (int208 downcasted) { downcasted = int208(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(208, value); } } /** * @dev Returns the downcasted int200 from int256, reverting on * overflow (when the input is less than smallest int200 or * greater than largest int200). * * Counterpart to Solidity's `int200` operator. * * Requirements: * * - input must fit into 200 bits */ function toInt200(int256 value) internal pure returns (int200 downcasted) { downcasted = int200(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(200, value); } } /** * @dev Returns the downcasted int192 from int256, reverting on * overflow (when the input is less than smallest int192 or * greater than largest int192). * * Counterpart to Solidity's `int192` operator. * * Requirements: * * - input must fit into 192 bits */ function toInt192(int256 value) internal pure returns (int192 downcasted) { downcasted = int192(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(192, value); } } /** * @dev Returns the downcasted int184 from int256, reverting on * overflow (when the input is less than smallest int184 or * greater than largest int184). * * Counterpart to Solidity's `int184` operator. * * Requirements: * * - input must fit into 184 bits */ function toInt184(int256 value) internal pure returns (int184 downcasted) { downcasted = int184(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(184, value); } } /** * @dev Returns the downcasted int176 from int256, reverting on * overflow (when the input is less than smallest int176 or * greater than largest int176). * * Counterpart to Solidity's `int176` operator. * * Requirements: * * - input must fit into 176 bits */ function toInt176(int256 value) internal pure returns (int176 downcasted) { downcasted = int176(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(176, value); } } /** * @dev Returns the downcasted int168 from int256, reverting on * overflow (when the input is less than smallest int168 or * greater than largest int168). * * Counterpart to Solidity's `int168` operator. * * Requirements: * * - input must fit into 168 bits */ function toInt168(int256 value) internal pure returns (int168 downcasted) { downcasted = int168(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(168, value); } } /** * @dev Returns the downcasted int160 from int256, reverting on * overflow (when the input is less than smallest int160 or * greater than largest int160). * * Counterpart to Solidity's `int160` operator. * * Requirements: * * - input must fit into 160 bits */ function toInt160(int256 value) internal pure returns (int160 downcasted) { downcasted = int160(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(160, value); } } /** * @dev Returns the downcasted int152 from int256, reverting on * overflow (when the input is less than smallest int152 or * greater than largest int152). * * Counterpart to Solidity's `int152` operator. * * Requirements: * * - input must fit into 152 bits */ function toInt152(int256 value) internal pure returns (int152 downcasted) { downcasted = int152(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(152, value); } } /** * @dev Returns the downcasted int144 from int256, reverting on * overflow (when the input is less than smallest int144 or * greater than largest int144). * * Counterpart to Solidity's `int144` operator. * * Requirements: * * - input must fit into 144 bits */ function toInt144(int256 value) internal pure returns (int144 downcasted) { downcasted = int144(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(144, value); } } /** * @dev Returns the downcasted int136 from int256, reverting on * overflow (when the input is less than smallest int136 or * greater than largest int136). * * Counterpart to Solidity's `int136` operator. * * Requirements: * * - input must fit into 136 bits */ function toInt136(int256 value) internal pure returns (int136 downcasted) { downcasted = int136(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(136, value); } } /** * @dev Returns the downcasted int128 from int256, reverting on * overflow (when the input is less than smallest int128 or * greater than largest int128). * * Counterpart to Solidity's `int128` operator. * * Requirements: * * - input must fit into 128 bits */ function toInt128(int256 value) internal pure returns (int128 downcasted) { downcasted = int128(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(128, value); } } /** * @dev Returns the downcasted int120 from int256, reverting on * overflow (when the input is less than smallest int120 or * greater than largest int120). * * Counterpart to Solidity's `int120` operator. * * Requirements: * * - input must fit into 120 bits */ function toInt120(int256 value) internal pure returns (int120 downcasted) { downcasted = int120(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(120, value); } } /** * @dev Returns the downcasted int112 from int256, reverting on * overflow (when the input is less than smallest int112 or * greater than largest int112). * * Counterpart to Solidity's `int112` operator. * * Requirements: * * - input must fit into 112 bits */ function toInt112(int256 value) internal pure returns (int112 downcasted) { downcasted = int112(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(112, value); } } /** * @dev Returns the downcasted int104 from int256, reverting on * overflow (when the input is less than smallest int104 or * greater than largest int104). * * Counterpart to Solidity's `int104` operator. * * Requirements: * * - input must fit into 104 bits */ function toInt104(int256 value) internal pure returns (int104 downcasted) { downcasted = int104(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(104, value); } } /** * @dev Returns the downcasted int96 from int256, reverting on * overflow (when the input is less than smallest int96 or * greater than largest int96). * * Counterpart to Solidity's `int96` operator. * * Requirements: * * - input must fit into 96 bits */ function toInt96(int256 value) internal pure returns (int96 downcasted) { downcasted = int96(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(96, value); } } /** * @dev Returns the downcasted int88 from int256, reverting on * overflow (when the input is less than smallest int88 or * greater than largest int88). * * Counterpart to Solidity's `int88` operator. * * Requirements: * * - input must fit into 88 bits */ function toInt88(int256 value) internal pure returns (int88 downcasted) { downcasted = int88(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(88, value); } } /** * @dev Returns the downcasted int80 from int256, reverting on * overflow (when the input is less than smallest int80 or * greater than largest int80). * * Counterpart to Solidity's `int80` operator. * * Requirements: * * - input must fit into 80 bits */ function toInt80(int256 value) internal pure returns (int80 downcasted) { downcasted = int80(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(80, value); } } /** * @dev Returns the downcasted int72 from int256, reverting on * overflow (when the input is less than smallest int72 or * greater than largest int72). * * Counterpart to Solidity's `int72` operator. * * Requirements: * * - input must fit into 72 bits */ function toInt72(int256 value) internal pure returns (int72 downcasted) { downcasted = int72(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(72, value); } } /** * @dev Returns the downcasted int64 from int256, reverting on * overflow (when the input is less than smallest int64 or * greater than largest int64). * * Counterpart to Solidity's `int64` operator. * * Requirements: * * - input must fit into 64 bits */ function toInt64(int256 value) internal pure returns (int64 downcasted) { downcasted = int64(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(64, value); } } /** * @dev Returns the downcasted int56 from int256, reverting on * overflow (when the input is less than smallest int56 or * greater than largest int56). * * Counterpart to Solidity's `int56` operator. * * Requirements: * * - input must fit into 56 bits */ function toInt56(int256 value) internal pure returns (int56 downcasted) { downcasted = int56(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(56, value); } } /** * @dev Returns the downcasted int48 from int256, reverting on * overflow (when the input is less than smallest int48 or * greater than largest int48). * * Counterpart to Solidity's `int48` operator. * * Requirements: * * - input must fit into 48 bits */ function toInt48(int256 value) internal pure returns (int48 downcasted) { downcasted = int48(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(48, value); } } /** * @dev Returns the downcasted int40 from int256, reverting on * overflow (when the input is less than smallest int40 or * greater than largest int40). * * Counterpart to Solidity's `int40` operator. * * Requirements: * * - input must fit into 40 bits */ function toInt40(int256 value) internal pure returns (int40 downcasted) { downcasted = int40(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(40, value); } } /** * @dev Returns the downcasted int32 from int256, reverting on * overflow (when the input is less than smallest int32 or * greater than largest int32). * * Counterpart to Solidity's `int32` operator. * * Requirements: * * - input must fit into 32 bits */ function toInt32(int256 value) internal pure returns (int32 downcasted) { downcasted = int32(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(32, value); } } /** * @dev Returns the downcasted int24 from int256, reverting on * overflow (when the input is less than smallest int24 or * greater than largest int24). * * Counterpart to Solidity's `int24` operator. * * Requirements: * * - input must fit into 24 bits */ function toInt24(int256 value) internal pure returns (int24 downcasted) { downcasted = int24(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(24, value); } } /** * @dev Returns the downcasted int16 from int256, reverting on * overflow (when the input is less than smallest int16 or * greater than largest int16). * * Counterpart to Solidity's `int16` operator. * * Requirements: * * - input must fit into 16 bits */ function toInt16(int256 value) internal pure returns (int16 downcasted) { downcasted = int16(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(16, value); } } /** * @dev Returns the downcasted int8 from int256, reverting on * overflow (when the input is less than smallest int8 or * greater than largest int8). * * Counterpart to Solidity's `int8` operator. * * Requirements: * * - input must fit into 8 bits */ function toInt8(int256 value) internal pure returns (int8 downcasted) { downcasted = int8(value); if (downcasted != value) { revert SafeCastOverflowedIntDowncast(8, value); } } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. */ function toInt256(uint256 value) internal pure returns (int256) { // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive if (value > uint256(type(int256).max)) { revert SafeCastOverflowedUintToInt(value); } return int256(value); } /** * @dev Cast a boolean (false or true) to a uint256 (0 or 1) with no jump. */ function toUint(bool b) internal pure returns (uint256 u) { assembly ("memory-safe") { u := iszero(iszero(b)) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.1.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.20; import {SafeCast} from "./SafeCast.sol"; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMath { /** * @dev Branchless ternary evaluation for `a ? b : c`. Gas costs are constant. * * IMPORTANT: This function may reduce bytecode size and consume less gas when used standalone. * However, the compiler may optimize Solidity ternary operations (i.e. `a ? b : c`) to only compute * one branch when needed, making this function more expensive. */ function ternary(bool condition, int256 a, int256 b) internal pure returns (int256) { unchecked { // branchless ternary works because: // b ^ (a ^ b) == a // b ^ 0 == b return b ^ ((a ^ b) * int256(SafeCast.toUint(condition))); } } /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return ternary(a > b, a, b); } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return ternary(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 { // Formula from the "Bit Twiddling Hacks" by Sean Eron Anderson. // Since `n` is a signed integer, the generated bytecode will use the SAR opcode to perform the right shift, // taking advantage of the most significant (or "sign" bit) in two's complement representation. // This opcode adds new most significant bits set to the value of the previous most significant bit. As a result, // the mask will either be `bytes32(0)` (if n is positive) or `~bytes32(0)` (if n is negative). int256 mask = n >> 255; // A `bytes32(0)` mask leaves the input unchanged, while a `~bytes32(0)` mask complements it. return uint256((n + mask) ^ mask); } } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.26; import "@openzeppelin/contracts/access/Ownable2Step.sol"; abstract contract Withdrawable is Ownable2Step { event Withdrawal(uint256 amount, uint256 occuredAt); function withdraw(uint256 amount) external onlyOwner { require(address(this).balance >= amount, "Not enough funds"); emit Withdrawal(amount, block.timestamp); _sendFunds(owner(), amount); } function _sendFunds(address receiverAddress, uint256 amount) private { (bool success, ) = payable(receiverAddress).call{value: amount}(""); require(success, "Transfer failed"); } }
{ "evmVersion": "paris", "libraries": {}, "optimizer": { "enabled": true, "runs": 1000 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
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Contract ABI
API[{"inputs":[{"internalType":"string","name":"tokenName","type":"string"},{"internalType":"string","name":"tokenSymbol","type":"string"},{"internalType":"string","name":"imageTemplateURIPrefix_","type":"string"},{"internalType":"string","name":"topLevelDomain","type":"string"},{"internalType":"address","name":"ownerAddress","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"address","name":"owner","type":"address"}],"name":"ERC721IncorrectOwner","type":"error"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ERC721InsufficientApproval","type":"error"},{"inputs":[{"internalType":"address","name":"approver","type":"address"}],"name":"ERC721InvalidApprover","type":"error"},{"inputs":[{"internalType":"address","name":"operator","type":"address"}],"name":"ERC721InvalidOperator","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"ERC721InvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"receiver","type":"address"}],"name":"ERC721InvalidReceiver","type":"error"},{"inputs":[{"internalType":"address","name":"sender","type":"address"}],"name":"ERC721InvalidSender","type":"error"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ERC721NonexistentToken","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"OwnableInvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"OwnableUnauthorizedAccount","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"domainName","type":"string"},{"indexed":false,"internalType":"uint256","name":"price","type":"uint256"}],"name":"CustomPriceChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"yearAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"discount","type":"uint256"}],"name":"DiscountPerYearChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"newImageTemplateURIPrefix","type":"string"}],"name":"ImageTemplateURIPrefixChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"string","name":"domainName","type":"string"},{"indexed":false,"internalType":"bool","name":"isPrimary","type":"bool"},{"indexed":false,"internalType":"uint256","name":"expiredAt","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"price","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"timestamp","type":"uint256"}],"name":"Leased","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferStarted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"length","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"price","type":"uint256"}],"name":"PricePerNameLengthChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"string","name":"domainName","type":"string"},{"indexed":false,"internalType":"bool","name":"isPrimary","type":"bool"}],"name":"PrimaryNameChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"newSafePeriodDays","type":"uint256"}],"name":"SafePeriodChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","typ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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : tokenName (string): Katana Web3 ID
Arg [1] : tokenSymbol (string): KATANAID
Arg [2] : imageTemplateURIPrefix_ (string): https://conft.app/domains-image/katana_mainnet/
Arg [3] : topLevelDomain (string): ktn
Arg [4] : ownerAddress (address): 0xD6595f4E1CD11d48f798327CA647bBe716E478Fb
-----Encoded View---------------
14 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000120
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000180
Arg [4] : 000000000000000000000000d6595f4e1cd11d48f798327ca647bbe716e478fb
Arg [5] : 000000000000000000000000000000000000000000000000000000000000000e
Arg [6] : 4b6174616e612057656233204944000000000000000000000000000000000000
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000008
Arg [8] : 4b4154414e414944000000000000000000000000000000000000000000000000
Arg [9] : 000000000000000000000000000000000000000000000000000000000000002f
Arg [10] : 68747470733a2f2f636f6e66742e6170702f646f6d61696e732d696d6167652f
Arg [11] : 6b6174616e615f6d61696e6e65742f0000000000000000000000000000000000
Arg [12] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [13] : 6b746e0000000000000000000000000000000000000000000000000000000000
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[ Download: CSV Export ]
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