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Latest 15 from a total of 15 transactions
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Mint Public | 16868825 | 644 days ago | IN | 0 ETH | 0.00192701 | ||||
Mint Public | 15363356 | 858 days ago | IN | 0 ETH | 0.00093937 | ||||
Mint Public | 15363281 | 858 days ago | IN | 0 ETH | 0.00058558 | ||||
Mint Public | 15363061 | 858 days ago | IN | 0 ETH | 0.00062146 | ||||
Mint Public | 15345560 | 861 days ago | IN | 0 ETH | 0.00264629 | ||||
Mint Public | 15133399 | 894 days ago | IN | 0 ETH | 0.00254682 | ||||
Mint Public | 15102761 | 899 days ago | IN | 0 ETH | 0.00492978 | ||||
Mint Public | 15100262 | 899 days ago | IN | 0 ETH | 0.00169971 | ||||
Mint Public | 15094701 | 900 days ago | IN | 0 ETH | 0.00153975 | ||||
Update Metadata | 15094614 | 900 days ago | IN | 0 ETH | 0.0004653 | ||||
Update Descripti... | 15094605 | 900 days ago | IN | 0 ETH | 0.00050535 | ||||
Update Descripti... | 15094602 | 900 days ago | IN | 0 ETH | 0.00062925 | ||||
Update Descripti... | 15094573 | 900 days ago | IN | 0 ETH | 0.00184306 | ||||
Update Metadata | 15094567 | 900 days ago | IN | 0 ETH | 0.00055994 | ||||
Update Metadata | 15094542 | 900 days ago | IN | 0 ETH | 0.00065466 |
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15094414 | 900 days ago | Contract Creation | 0 ETH |
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Minimal Proxy Contract for 0x3c176b2929fb96daeab9705b0a0959b1dda32d10
Contract Name:
DixelClubV2NFT
Compiler Version
v0.8.13+commit.abaa5c0e
Optimization Enabled:
Yes with 1500 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BSD-3-Clause pragma solidity ^0.8.13; import "@openzeppelin/contracts/interfaces/IERC2981.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "base64-sol/base64.sol"; import "./lib/ERC721Initializable.sol"; import "./lib/ERC721Queryable.sol"; import "./lib/ColorUtils.sol"; import "./lib/StringUtils.sol"; import "./IDixelClubV2Factory.sol"; import "./Shared.sol"; import "./Constants.sol"; import "./SVGGenerator.sol"; // inheriting Constants /* Change Logs <Version 2> 1. Added default dimemsions on SVG for better compatibility (Opensea) 2. Fixed white gapp issues on Safari & iPhone browsers (hack: 25f5e59) 3. Allow new-line characters on descriptions */ contract DixelClubV2NFT is ERC721Queryable, Ownable, Constants, SVGGenerator { error DixelClubV2__NotExist(); error DixelClubV2__Initalized(); error DixelClubV2__InvalidCost(uint256 expected, uint256 actual); error DixelClubV2__MaximumMinted(); error DixelClubV2__NotStarted(uint40 beginAt, uint40 nowAt); error DixelClubV2__NotWhitelisted(); error DixelClubV2__NotApproved(); error DixelClubV2__PublicCollection(); error DixelClubV2__PrivateCollection(); error DixelClubV2__InvalidRoyalty(uint256 invalid); error DixelClubV2__AlreadyStarted(); error DixelClubV2__DescriptionTooLong(); error DixelClubV2__DescriptionContainMalicious(); error DixelClubV2__WhiteListValueDoNotMatch(address expected, address actual); struct EditionData { uint24[PALETTE_SIZE] palette; // 24bit color (16,777,216) - up to 16 colors } IDixelClubV2Factory private _factory; uint40 private _initializedAt; Shared.MetaData private _metaData; // Collection meta data EditionData[] private _editionData; // Color (palette) data for each edition uint8[PIXEL_ARRAY_SIZE] private _pixels; // 8 * 288 = 2304bit = 9 of 256bit storage block. Each uint8 saves 2 pixels. // NOTE: Implemented whitelist managing function with the simplest structure for gas saving // - EnumerableMap adds 3-5x more gas // - MerkleTree doesn't fit for managing the actual list on-chain address[] private _whitelist; string private _description; event Mint(address indexed to, uint256 indexed tokenId); event Burn(uint256 indexed tokenId); modifier checkTokenExists(uint256 tokenId) { if (!_exists(tokenId)) revert DixelClubV2__NotExist(); _; } function init( address owner_, string calldata name_, string calldata symbol_, string calldata description_, Shared.MetaData calldata metaData_, uint24[PALETTE_SIZE] calldata palette_, uint8[PIXEL_ARRAY_SIZE] calldata pixels_ ) external { if(_initializedAt != 0) revert DixelClubV2__Initalized(); _initializedAt = uint40(block.timestamp); _factory = IDixelClubV2Factory(msg.sender); // ERC721 attributes _name = name_; _symbol = symbol_; _description = description_; // Custom attributes _metaData = metaData_; _pixels = pixels_; // Transfer ownership to the collection creator, so he/she can edit info on marketplaces like Opeansea _transferOwnership(owner_); // Mint edition #0 to the creator with the default palette set automatically _mintNewEdition(owner_, palette_); } function mintPublic(address to, uint24[PALETTE_SIZE] calldata palette) external payable { if(_metaData.whitelistOnly) revert DixelClubV2__PrivateCollection(); _mintWithFees(to, palette); } function mintPrivate(uint256 whitelistIndex, address to, uint24[PALETTE_SIZE] calldata palette) external payable { if(!_metaData.whitelistOnly) revert DixelClubV2__PublicCollection(); _removeWhitelist(whitelistIndex, msg.sender); _mintWithFees(to, palette); } function _mintWithFees(address to, uint24[PALETTE_SIZE] calldata palette) private { uint256 mintingCost = uint256(_metaData.mintingCost); if(msg.value != mintingCost) revert DixelClubV2__InvalidCost(mintingCost, msg.value); if(nextTokenId() >= _metaData.maxSupply) revert DixelClubV2__MaximumMinted(); if(uint40(block.timestamp) < _metaData.mintingBeginsFrom) revert DixelClubV2__NotStarted(_metaData.mintingBeginsFrom, uint40(block.timestamp)); if (mintingCost > 0) { // Send fee to the beneficiary uint256 fee = (mintingCost * _factory.mintingFee()) / FRICTION_BASE; (bool sent, ) = (_factory.beneficiary()).call{ value: fee }(""); require(sent, "FEE_TRANSFER_FAILED"); // Send the rest of minting cost to the collection creator (bool sent2, ) = (owner()).call{ value: mintingCost - fee }(""); require(sent2, "MINTING_COST_TRANSFER_FAILED"); } _mintNewEdition(to, palette); } function _mintNewEdition(address to, uint24[PALETTE_SIZE] calldata palette) private { uint256 nextId = nextTokenId(); _editionData.push(EditionData(palette)); unchecked { assert(nextId == _editionData.length - 1); } _safeMint(to, nextId); emit Mint(to, nextId); } function burn(uint256 tokenId) external { if(!_isApprovedOrOwner(msg.sender, tokenId)) revert DixelClubV2__NotApproved(); // This will check existence of token delete _editionData[tokenId]; _burn(tokenId); emit Burn(tokenId); } function tokenURI(uint256 tokenId) public view override checkTokenExists(tokenId) returns (string memory) { return string(abi.encodePacked("data:application/json;base64,", Base64.encode(bytes(tokenJSON(tokenId))))); } // Contract-level metadata for Opeansea // REF: https://docs.opensea.io/docs/contract-level-metadata function contractURI() public view returns (string memory) { return string(abi.encodePacked("data:application/json;base64,", Base64.encode(bytes(contractJSON())))); } // MARK: - Whitelist related functions // @dev Maximum length of list parameter can be limited by block gas limit of blockchain // @notice Duplicated address input means multiple allowance function addWhitelist(address[] calldata list) external onlyOwner { if(!_metaData.whitelistOnly) revert DixelClubV2__PublicCollection(); uint256 length = list.length; // gas saving for (uint256 i; i != length;) { _whitelist.push(list[i]); // O(1) for adding 1 address unchecked { ++i; } } } function _removeWhitelist(uint256 index, address value) private { if(!_metaData.whitelistOnly) revert DixelClubV2__PublicCollection(); if (_whitelist[index] != value) revert DixelClubV2__WhiteListValueDoNotMatch(value, _whitelist[index]); _whitelist[index] = _whitelist[_whitelist.length - 1]; // put the last element into the delete index _whitelist.pop(); // delete the last element to decrease array length; } // @dev O(1) for removing by index function removeWhitelist(uint256 index, address value) external onlyOwner { _removeWhitelist(index, value); } function resetWhitelist() external onlyOwner { delete _whitelist; } // @dev offset & limit for pagination function getAllWhitelist(uint256 offset, uint256 limit) external view returns (address[] memory list) { unchecked { address[] memory clone = _whitelist; // gas saving uint256 length = clone.length; // gas saving uint256 count = limit; if (offset >= length) { return list; // empty list } else if (offset + limit > length) { count = length - offset; } list = new address[](count); for (uint256 i = 0; i != count; ++i) { list[i] = clone[offset + i]; } } } function getWhitelistCount() external view returns (uint256) { return _whitelist.length; } // @dev utility function for front-end, that can be reverted if the list is too big function getWhitelistAllowanceLeft(address wallet) external view returns (uint256 allowance) { unchecked { address[] memory clone = _whitelist; // gas saving uint256 length = clone.length; // gas saving for (uint256 i; i != length; ++i) { if (clone[i] == wallet) { allowance++; } } return allowance; } } // @dev utility function for front-end, that can be reverted if the list is too big function getWhitelistIndex(address wallet) external view returns (uint256) { unchecked { address[] memory clone = _whitelist; // gas saving uint256 length = clone.length; // gas saving for (uint256 i; i != length; ++i) { if (clone[i] == wallet) { return i; } } revert DixelClubV2__NotWhitelisted(); } } // MARK: - Update metadata function updateMetadata(bool whitelistOnly, bool hidden, uint24 royaltyFriction, uint40 mintingBeginsFrom, uint152 mintingCost) external onlyOwner { if(royaltyFriction > MAX_ROYALTY_FRACTION) revert DixelClubV2__InvalidRoyalty(royaltyFriction); if(_metaData.mintingBeginsFrom != mintingBeginsFrom && uint40(block.timestamp) >= _metaData.mintingBeginsFrom) revert DixelClubV2__AlreadyStarted(); _metaData.whitelistOnly = whitelistOnly; if (!_metaData.whitelistOnly) { delete _whitelist; // empty whitelist array data if it becomes public } _metaData.hidden = hidden; _metaData.royaltyFriction = royaltyFriction; _metaData.mintingBeginsFrom = mintingBeginsFrom < block.timestamp ? uint40(block.timestamp) : mintingBeginsFrom; _metaData.mintingCost = mintingCost; } function updateDescription(string calldata description) external onlyOwner { if (bytes(description).length > 1000) revert DixelClubV2__DescriptionTooLong(); // ~900 gas per character if (!StringUtils.validJSONValue(description)) revert DixelClubV2__DescriptionContainMalicious(); _description = description; } // MARK: - External utility functions function generateSVG(uint256 tokenId) external view checkTokenExists(tokenId) returns (string memory) { return _generateSVG(_editionData[tokenId].palette, _pixels); } function generateBase64SVG(uint256 tokenId) public view checkTokenExists(tokenId) returns (string memory) { return _generateBase64SVG(_editionData[tokenId].palette, _pixels); } function tokenJSON(uint256 tokenId) public view checkTokenExists(tokenId) returns (string memory) { return string(abi.encodePacked( '{"name":"', _symbol, ' #', ColorUtils.uint2str(tokenId), '","description":"', _description, '","external_url":"https://dixel.club/collection/', ColorUtils.uint2str(block.chainid), '/', StringUtils.address2str(address(this)), '/', ColorUtils.uint2str(tokenId), '","image":"', generateBase64SVG(tokenId), '"}' )); } function contractJSON() public view returns (string memory) { return string(abi.encodePacked( '{"name":"', _name, '","description":"', _description, '","image":"', generateBase64SVG(0), '","external_link":"https://dixel.club/collection/', ColorUtils.uint2str(block.chainid), '/', StringUtils.address2str(address(this)), '","seller_fee_basis_points":"', ColorUtils.uint2str(_metaData.royaltyFriction), '","fee_recipient":"', StringUtils.address2str(owner()), '"}' )); } function exists(uint256 tokenId) external view returns (bool) { return _exists(tokenId); } function listData() external view returns (uint40 initializedAt_, bool hidden_) { initializedAt_ = _initializedAt; hidden_ = _metaData.hidden; } function metaData() external view returns ( string memory name_, bool whitelistOnly_, uint24 maxSupply_, uint24 royaltyFriction_, uint40 mintingBeginsFrom_, uint168 mintingCost_, string memory description_, uint256 nextTokenId_, uint256 totalSupply_, address owner_, uint8[PIXEL_ARRAY_SIZE] memory pixels_, uint24[PALETTE_SIZE] memory defaultPalette_ ) { name_ = name(); whitelistOnly_ = _metaData.whitelistOnly; maxSupply_ = _metaData.maxSupply; royaltyFriction_ = _metaData.royaltyFriction; mintingBeginsFrom_ = _metaData.mintingBeginsFrom; mintingCost_ = _metaData.mintingCost; description_ = _description; nextTokenId_ = nextTokenId(); totalSupply_ = totalSupply(); owner_ = owner(); pixels_ = _pixels; defaultPalette_ = _editionData[0].palette; } function paletteOf(uint256 tokenId) external view checkTokenExists(tokenId) returns (uint24[PALETTE_SIZE] memory) { return _editionData[tokenId].palette; } function getAllPixels() external view returns (uint8[PIXEL_ARRAY_SIZE] memory) { return _pixels; } // MARK: - Override extensions function supportsInterface(bytes4 interfaceId) public view override(ERC721Initializable) returns (bool) { return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId); } /** * @dev IERC2981 implementation * - NOTE: ERC2981 royalty info may not be applied on some marketplaces * - NOTE: Opensea uses contract-level metadata: https://docs.opensea.io/docs/contract-level-metadata */ function royaltyInfo(uint256 /*_tokenId*/, uint256 _salePrice) public view returns (address, uint256) { // NOTE: // 1. The same royalty friction for all tokens in the same collection // 2. Receiver is collection owner return (owner(), (_salePrice * _metaData.royaltyFriction) / FRICTION_BASE); } // NFT implementation version function version() external pure virtual returns (uint16) { return 2; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (interfaces/IERC2981.sol) pragma solidity ^0.8.0; import "../utils/introspection/IERC165.sol"; /** * @dev Interface for the NFT Royalty Standard. * * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal * support for royalty payments across all NFT marketplaces and ecosystem participants. * * _Available since v4.5._ */ interface IERC2981 is IERC165 { /** * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of * exchange. The royalty amount is denominated and should be paid in that same unit of exchange. */ function royaltyInfo(uint256 tokenId, uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0; /// @title Base64 /// @author Brecht Devos - <[email protected]> /// @notice Provides functions for encoding/decoding base64 library Base64 { string internal constant TABLE_ENCODE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; bytes internal constant TABLE_DECODE = hex"0000000000000000000000000000000000000000000000000000000000000000" hex"00000000000000000000003e0000003f3435363738393a3b3c3d000000000000" hex"00000102030405060708090a0b0c0d0e0f101112131415161718190000000000" hex"001a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132330000000000"; function encode(bytes memory data) internal pure returns (string memory) { if (data.length == 0) return ''; // load the table into memory string memory table = TABLE_ENCODE; // multiply by 4/3 rounded up uint256 encodedLen = 4 * ((data.length + 2) / 3); // add some extra buffer at the end required for the writing string memory result = new string(encodedLen + 32); assembly { // set the actual output length mstore(result, encodedLen) // prepare the lookup table let tablePtr := add(table, 1) // input ptr let dataPtr := data let endPtr := add(dataPtr, mload(data)) // result ptr, jump over length let resultPtr := add(result, 32) // run over the input, 3 bytes at a time for {} lt(dataPtr, endPtr) {} { // read 3 bytes dataPtr := add(dataPtr, 3) let input := mload(dataPtr) // write 4 characters mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F)))) resultPtr := add(resultPtr, 1) mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F)))) resultPtr := add(resultPtr, 1) mstore8(resultPtr, mload(add(tablePtr, and(shr( 6, input), 0x3F)))) resultPtr := add(resultPtr, 1) mstore8(resultPtr, mload(add(tablePtr, and( input, 0x3F)))) resultPtr := add(resultPtr, 1) } // padding with '=' switch mod(mload(data), 3) case 1 { mstore(sub(resultPtr, 2), shl(240, 0x3d3d)) } case 2 { mstore(sub(resultPtr, 1), shl(248, 0x3d)) } } return result; } function decode(string memory _data) internal pure returns (bytes memory) { bytes memory data = bytes(_data); if (data.length == 0) return new bytes(0); require(data.length % 4 == 0, "invalid base64 decoder input"); // load the table into memory bytes memory table = TABLE_DECODE; // every 4 characters represent 3 bytes uint256 decodedLen = (data.length / 4) * 3; // add some extra buffer at the end required for the writing bytes memory result = new bytes(decodedLen + 32); assembly { // padding with '=' let lastBytes := mload(add(data, mload(data))) if eq(and(lastBytes, 0xFF), 0x3d) { decodedLen := sub(decodedLen, 1) if eq(and(lastBytes, 0xFFFF), 0x3d3d) { decodedLen := sub(decodedLen, 1) } } // set the actual output length mstore(result, decodedLen) // prepare the lookup table let tablePtr := add(table, 1) // input ptr let dataPtr := data let endPtr := add(dataPtr, mload(data)) // result ptr, jump over length let resultPtr := add(result, 32) // run over the input, 4 characters at a time for {} lt(dataPtr, endPtr) {} { // read 4 characters dataPtr := add(dataPtr, 4) let input := mload(dataPtr) // write 3 bytes let output := add( add( shl(18, and(mload(add(tablePtr, and(shr(24, input), 0xFF))), 0xFF)), shl(12, and(mload(add(tablePtr, and(shr(16, input), 0xFF))), 0xFF))), add( shl( 6, and(mload(add(tablePtr, and(shr( 8, input), 0xFF))), 0xFF)), and(mload(add(tablePtr, and( input , 0xFF))), 0xFF) ) ) mstore(resultPtr, shl(232, output)) resultPtr := add(resultPtr, 3) } } return result; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/ERC721.sol) pragma solidity ^0.8.13; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol"; import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol"; import "@openzeppelin/contracts/utils/Address.sol"; import "@openzeppelin/contracts/utils/Context.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; /** * @dev A slightly modified version of ERC721.sol (from Openzeppelin 4.6.0) for initialization pattern * - remove constructor * - make `_name`, `_symbol` and `_owners` internal instead of private * - rename ERC721 -> ERC721Initializable */ abstract contract ERC721Initializable is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string internal _name; // Token symbol string internal _symbol; // Mapping from token ID to owner address mapping(uint256 => address) internal _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev 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 override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: owner query for nonexistent token"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @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 override { address owner = ERC721Initializable.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - 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, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ERC721Initializable.ownerOf(tokenId); return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * 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 virtual { _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); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @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 virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); _afterTokenTransfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721Initializable.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); _afterTokenTransfer(owner, address(0), 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 virtual { require(ERC721Initializable.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; unchecked { _balances[to] += 1; } _owners[tokenId] = to; emit Transfer(from, to, tokenId); _afterTokenTransfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721Initializable.ownerOf(tokenId), to, tokenId); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits a {ApprovalForAll} event. */ function _setApprovalForAll( address owner, address operator, bool approved ) internal virtual { require(owner != operator, "ERC721: approve to caller"); _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import './ERC721Initializable.sol'; /** * @title ERC721A Queryable + ERC721Enumerable#totalSupply only to save gas * @dev ERC721A subclass with convenience query functions. */ abstract contract ERC721Queryable is ERC721Initializable { error ERC721Queryable__InvalidQueryRange(); // @dev Store total number of Tokens. uint256 private _totalSupply; // @dev The tokenId of the next token to be minted. uint256 private _currentIndex; /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` cannot be the zero address. * - `to` cannot be the zero address. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override { super._beforeTokenTransfer(from, to, tokenId); unchecked { if (from == address(0)) { ++_totalSupply; ++_currentIndex; } else if (to == address(0)) { --_totalSupply; } } } function totalSupply() public view returns (uint256) { return _totalSupply; } /** * @dev Returns the next token ID to be minted. */ function nextTokenId() public view returns (uint256) { return _currentIndex; } /** * @dev Returns an array of token IDs owned by `owner`, * in the range [`start`, `stop`) * (i.e. `start <= tokenId < stop`). * * This function allows for tokens to be queried if the collection * grows too big for a single call of {ERC721Queryable-tokensOfOwner}. * * Requirements: * * - `start` < `stop` */ function tokensOfOwnerIn( address owner, uint256 start, uint256 stop ) external view returns (uint256[] memory) { unchecked { if (start >= stop) revert ERC721Queryable__InvalidQueryRange(); if (stop > _currentIndex) { stop = _currentIndex; } uint256 tokenIdsMaxLength = balanceOf(owner); uint256[] memory tokenIds = new uint256[](tokenIdsMaxLength); if (tokenIdsMaxLength == 0) { return tokenIds; } // Set `tokenIdsMaxLength = min(balanceOf(owner), stop - start)`, // to cater for cases where `balanceOf(owner)` is too big. if (stop - start < tokenIdsMaxLength) { tokenIdsMaxLength = stop - start; } uint256 tokenIdsIdx; for (uint256 i = start; i != stop && tokenIdsIdx != tokenIdsMaxLength; ++i) { if(_owners[i] == owner) { tokenIds[tokenIdsIdx++] = i; } } // Downsize the array to fit. assembly { mstore(tokenIds, tokenIdsIdx) } return tokenIds; } } /** * @dev Returns an array of token IDs owned by `owner`. * * This function scans the ownership mapping and is O(totalSupply) in complexity. * It is meant to be called off-chain. * * See {ERC721Queryable-tokensOfOwnerIn} for splitting the scan into * multiple smaller scans if the collection is large enough to cause * an out-of-gas error (10K pfp collections should be fine). */ function tokensOfOwner(address owner) external view returns (uint256[] memory) { unchecked { uint256 tokenIdsIdx; uint256 tokenIdsLength = balanceOf(owner); uint256[] memory tokenIds = new uint256[](tokenIdsLength); for (uint256 i = 0; tokenIdsIdx != tokenIdsLength; ++i) { if(_owners[i] == owner) { tokenIds[tokenIdsIdx++] = i; } } return tokenIds; } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.13; library ColorUtils { function uint2str(uint256 i) internal pure returns (string memory) { if (i == 0) { return "0"; } uint256 j = i; uint256 len; while (j != 0) { len++; j /= 10; } bytes memory bstr = new bytes(len); uint256 k = len; while (i != 0) { k = k-1; uint8 temp = (48 + uint8(i - i / 10 * 10)); bytes1 b1 = bytes1(temp); bstr[k] = b1; i /= 10; } return string(bstr); } function uint2hex(uint24 i) internal pure returns (string memory) { bytes memory o = new bytes(6); uint24 mask = 0x00000f; // hex 15 uint256 k = 6; do { k--; uint8 masked = uint8(i & mask); o[k] = bytes1((masked > 9) ? (masked + 87) : (masked + 48)); // ASCII a-f => +87 | 0-9 => +48 i >>= 4; } while (k > 0); return string(o); } }
// SPDX-License-Identifier: BSD-3-Clause import "@openzeppelin/contracts/utils/Strings.sol"; pragma solidity ^0.8.13; library StringUtils { // Check if haystack has any invalid character for JSON value: // - ": 0x22 // - \: 0x5c // - any control characters: 0x00-0x1f (except new line = 0x0a), 0x7f function validJSONValue(string calldata haystack) internal pure returns (bool) { bytes memory haystackBytes = bytes(haystack); uint256 length = haystackBytes.length; for (uint256 i; i != length;) { bytes1 char = haystackBytes[i]; if ((char < 0x20 && char != 0x0a) || char == 0x22 || char == 0x5c || char == 0x7f) { return false; } unchecked { ++i; } } return true; } function address2str(address addr) internal pure returns (string memory) { return Strings.toHexString(uint160(addr), 20); } }
// SPDX-License-Identifier: BSD-3-Clause pragma solidity ^0.8.13; import "./Shared.sol"; interface IDixelClubV2Factory { function beneficiary() external view returns (address); function mintingFee() external view returns (uint256); }
// SPDX-License-Identifier: BSD-3-Clause pragma solidity ^0.8.13; library Shared { struct MetaData { bool whitelistOnly; bool hidden; uint24 maxSupply; // can be minted up to MAX_SUPPLY uint24 royaltyFriction; // used for `royaltyInfo` (ERC2981) and `seller_fee_basis_points` (Opeansea's Contract-level metadata) uint40 mintingBeginsFrom; // Timestamp that minting event begins uint152 mintingCost; // Native token (ETH, BNB, KLAY, etc) } }
// SPDX-License-Identifier: BSD-3-Clause pragma solidity ^0.8.13; abstract contract Constants { uint256 public constant MAX_SUPPLY = 1000000; // 1M hardcap max uint256 public constant MAX_ROYALTY_FRACTION = 1000; // 10% uint256 public constant FRICTION_BASE = 10000; uint256 internal constant PALETTE_SIZE = 16; // 16 colors max - equal to the data type max value of CANVAS_SIZE (2^8 = 16) uint256 internal constant CANVAS_SIZE = 24; // 24x24 pixels uint256 internal constant TOTAL_PIXEL_COUNT = CANVAS_SIZE * CANVAS_SIZE; // 24x24 uint256 internal constant PIXEL_ARRAY_SIZE = TOTAL_PIXEL_COUNT / 2; // packing 2 pixels in each uint8 }
// SPDX-License-Identifier: BSD-3-Clause pragma solidity ^0.8.13; import "base64-sol/base64.sol"; import "./lib/ColorUtils.sol"; import "./Constants.sol"; /** * @title Dixel SVG image generator */ abstract contract SVGGenerator is Constants { // Using paths for each palette color (speed: 700-2300 / size: 1-5KB) // - pros: faster average speed, smaller svg size (over 50%) // - cons: slower worst-case speed // NOTE: viewBox -0.5 on top to prevent top side crop issue // ref: https://codepen.io/shshaw/post/vector-pixels-svg-optimization-animation-and-understanding-path-data#crazy-pants-optimization-4 // NOTE: viewbox height 23.999 & preserveAspectRatio="none" to prevent gpas between shapes when it's resized to an indivisible dimensions (e.g. 480x480 -> fine, but 500x500 shows gaps) // ref: https://codepen.io/sydneyitguy/pen/MWVgOjG string private constant HEADER = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 -0.5 24 23.999" width="960" height="960" preserveAspectRatio="none" shape-rendering="crispEdges">'; string private constant FOOTER = '</svg>'; function _generateSVG(uint24[PALETTE_SIZE] memory palette, uint8[PIXEL_ARRAY_SIZE] memory pixels) internal pure returns (string memory) { string[PALETTE_SIZE] memory paths; for (uint256 y; y < CANVAS_SIZE;) { uint256 prev = pixels[y * CANVAS_SIZE / 2] & 15; // prev pixel color. see comment below. x=0 so no shifting needed. paths[prev] = string(abi.encodePacked(paths[prev], "M0 ", ColorUtils.uint2str(y))); uint256 width = 1; for (uint256 x = 1; x < CANVAS_SIZE;) { /* Pixels array: we're packing 2 pixels into each uint8. So pixels[y * CANVAS_SIZE/2 + x/2] contains pixels (x,y) and (x+1,y). The 4 rightmost bits are (x,y), so to extract that value we mask pixels[y * CANVAS_SIZE/2 + x/2] with 15 ("00001111"). The 4 leftmost bits are (x+1,y), so to extract that value we shift pixels[y * CANVAS_SIZE/2 + x/2] 4 places to the right, and then mask it with 15 ("00001111"). */ uint256 current = (pixels[y * CANVAS_SIZE/2 + x/2] >> (4*(x%2))) & 15; // current pixel color. if (prev == current) { width++; } else { paths[prev] = string(abi.encodePacked(paths[prev], "h", ColorUtils.uint2str(width))); width = 1; paths[current] = string(abi.encodePacked(paths[current], "M", ColorUtils.uint2str(x), " ", ColorUtils.uint2str(y))); } if (x == CANVAS_SIZE - 1) { paths[current] = string(abi.encodePacked(paths[current], "h", ColorUtils.uint2str(width))); } prev = current; unchecked { ++x; } } unchecked { ++y; } } string memory joined; for (uint256 i; i < PALETTE_SIZE;) { if (bytes(paths[i]).length > 0) { joined = string(abi.encodePacked(joined, '<path stroke="#', ColorUtils.uint2hex(palette[i]), '" d="', paths[i], '"/>')); } unchecked { ++i; } } return string(abi.encodePacked(HEADER, joined, FOOTER)); } // Using block-stacking approach with color variables (speed: ~1500 / size: ~8.5KB) // - pros: constant speed & svg size, faster worst-case speed // - cons: slower average speed, bigger svg size /* DEPRECATED in favor of the solution above string private constant HEADER = '<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid meet" viewBox="0 0 24 24" shape-rendering="crispEdges"><style>'; string private constant FOOTER = '</style><defs><rect id="p" width="40" height="40"/><svg id="r"><use href="#p" fill="var(--a)"/><use href="#p" x="1" fill="var(--b)"/><use href="#p" x="2" fill="var(--c)"/><use href="#p" x="3" fill="var(--d)"/><use href="#p" x="4" fill="var(--e)"/><use href="#p" x="5" fill="var(--f)"/><use href="#p" x="6" fill="var(--g)"/><use href="#p" x="7" fill="var(--h)"/><use href="#p" x="8" fill="var(--i)"/><use href="#p" x="9" fill="var(--j)"/><use href="#p" x="10" fill="var(--k)"/><use href="#p" x="11" fill="var(--l)"/><use href="#p" x="12" fill="var(--m)"/><use href="#p" x="13" fill="var(--n)"/><use href="#p" x="14" fill="var(--o)"/><use href="#p" x="15" fill="var(--p)"/><use href="#p" x="16" fill="var(--q)"/><use href="#p" x="17" fill="var(--r)"/><use href="#p" x="18" fill="var(--s)"/><use href="#p" x="19" fill="var(--t)"/><use href="#p" x="20" fill="var(--u)"/><use href="#p" x="21" fill="var(--v)"/><use href="#p" x="22" fill="var(--w)"/><use href="#p" x="23" fill="var(--x)"/></svg></defs><use href="#r" class="a"/><use href="#r" y="1" class="b"/><use href="#r" y="2" class="c"/><use href="#r" y="3" class="d"/><use href="#r" y="4" class="e"/><use href="#r" y="5" class="f"/><use href="#r" y="6" class="g"/><use href="#r" y="7" class="h"/><use href="#r" y="8" class="i"/><use href="#r" y="9" class="j"/><use href="#r" y="10" class="k"/><use href="#r" y="11" class="l"/><use href="#r" y="12" class="m"/><use href="#r" y="13" class="n"/><use href="#r" y="14" class="o"/><use href="#r" y="15" class="p"/><use href="#r" y="16" class="q"/><use href="#r" y="17" class="r"/><use href="#r" y="18" class="s"/><use href="#r" y="19" class="t"/><use href="#r" y="20" class="u"/><use href="#r" y="21" class="v"/><use href="#r" y="22" class="w"/><use href="#r" y="23" class="x"/></svg>'; bytes32 private constant CLASS = 'abcdefghijklmnopqrstuvwx'; // class names for each row, pixel (length must be equal to CANVAS_SIZE) function _generateSVG(uint24[PALETTE_SIZE] memory palette, uint8[TOTAL_PIXEL_COUNT] memory pixels) internal pure returns (string memory) { string memory joined; string[CANVAS_SIZE] memory styles; for (uint256 x = 0; x < CANVAS_SIZE; x++) { styles[x] = string(abi.encodePacked(styles[x], '.', CLASS[x], '{')); for (uint256 y = 0; y < CANVAS_SIZE; y++) { styles[x] = string(abi.encodePacked(styles[x], '--', CLASS[y], ':#', ColorUtils.uint2hex(palette[pixels[x * CANVAS_SIZE + y]]), ';')); } styles[x] = string(abi.encodePacked(styles[x], '}')); joined = string(abi.encodePacked(joined, styles[x])); } return string(abi.encodePacked(HEADER, joined, FOOTER)); } */ function _generateBase64SVG(uint24[PALETTE_SIZE] memory palette, uint8[PIXEL_ARRAY_SIZE] memory pixels) internal pure returns (string memory) { return string(abi.encodePacked("data:image/svg+xml;base64,", Base64.encode(bytes(_generateSVG(palette, pixels))))); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
{ "optimizer": { "enabled": true, "runs": 1500 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
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Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.