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Latest 25 from a total of 264 transactions
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Set Approval For... | 18353430 | 329 days ago | IN | 0 ETH | 0.00012802 | ||||
Safe Transfer Fr... | 18091950 | 365 days ago | IN | 0 ETH | 0.00212168 | ||||
Safe Transfer Fr... | 17703662 | 419 days ago | IN | 0 ETH | 0.00291101 | ||||
Safe Transfer Fr... | 17286867 | 478 days ago | IN | 0 ETH | 0.00526629 | ||||
Safe Transfer Fr... | 17036918 | 513 days ago | IN | 0 ETH | 0.00230045 | ||||
Safe Transfer Fr... | 16948973 | 526 days ago | IN | 0 ETH | 0.00566091 | ||||
Safe Transfer Fr... | 16933586 | 528 days ago | IN | 0 ETH | 0.00840738 | ||||
Set Approval For... | 16775545 | 550 days ago | IN | 0 ETH | 0.0010113 | ||||
Set Approval For... | 16643263 | 569 days ago | IN | 0 ETH | 0.00229011 | ||||
Safe Transfer Fr... | 16392018 | 604 days ago | IN | 0 ETH | 0.00185709 | ||||
Safe Transfer Fr... | 16391322 | 604 days ago | IN | 0 ETH | 0.00191508 | ||||
Set Approval For... | 16267024 | 621 days ago | IN | 0 ETH | 0.00052318 | ||||
Safe Transfer Fr... | 16242668 | 625 days ago | IN | 0 ETH | 0.00211441 | ||||
Set Approval For... | 15638758 | 709 days ago | IN | 0 ETH | 0.0002506 | ||||
Safe Transfer Fr... | 15493029 | 731 days ago | IN | 0 ETH | 0.00215724 | ||||
Safe Transfer Fr... | 15493028 | 731 days ago | IN | 0 ETH | 0.00212084 | ||||
Safe Transfer Fr... | 15493024 | 731 days ago | IN | 0 ETH | 0.00240879 | ||||
Safe Transfer Fr... | 15493018 | 731 days ago | IN | 0 ETH | 0.00205682 | ||||
Owner Mint | 15430277 | 741 days ago | IN | 0 ETH | 0.00183642 | ||||
Owner Mint | 15430235 | 741 days ago | IN | 0 ETH | 0.00161113 | ||||
Owner Mint | 15430206 | 741 days ago | IN | 0 ETH | 0.00123996 | ||||
Owner Mint | 15430190 | 741 days ago | IN | 0 ETH | 0.00187452 | ||||
Owner Mint | 15430117 | 741 days ago | IN | 0 ETH | 0.00162473 | ||||
Owner Mint | 15430101 | 741 days ago | IN | 0 ETH | 0.00155981 | ||||
Owner Mint | 15429168 | 741 days ago | IN | 0 ETH | 0.00212238 |
Latest 1 internal transaction
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Parent Transaction Hash | Block | From | To | |||
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13142907 | 1102 days ago | 2.72 ETH |
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Contract Name:
Blitpops
Compiler Version
v0.8.0+commit.c7dfd78e
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import {IBlitmap} from "../Interfaces/IBlitmap.sol"; import {Base64} from "../Base64.sol"; import {strings} from "../StringUtils.sol"; contract Blitpops is ERC721Enumerable, Ownable, ERC165Storage { using strings for *; using Strings for uint256; struct FilterMatrix { uint256 revisions; string filter1; string filter2; string filter3; } mapping(uint256 => FilterMatrix) internal filterMap; uint256 public constant MINT_PRICE = 0.02 ether; uint256 public constant ROYALTY_AMOUNT = 10; bytes4 private constant _INTERFACE_ID_ERC2981 = 0xc155531d; address public BLITMAP_ADDRESS; uint256 public ownerSaleEnd; bool public editingAllowed; mapping(string => string) internal filters; string[] internal filterNames; constructor(address blitmapAddress) payable ERC721("Blitpop", "BLITPOP") { _registerInterface(_INTERFACE_ID_ERC2981); BLITMAP_ADDRESS = blitmapAddress; filters['og'] = '<svg>'; filters['campbells'] = '<filter id="campbells"><feColorMatrix type="matrix" values="1 0 0 1.9 -2.2 0 1 0 0.0 0.3 0 0 1 0 0.5 0 0 0 1 0.2"></feColorMatrix></filter><svg filter="url(#campbells)">'; filters['electric-chair'] = '<filter id="ec"><feColorMatrix type="matrix" values="1 0 0 0 0 -0.4 1.3 -0.4 0.2 -0.1 0 0 1 0 0 0 0 0 1 0"></feColorMatrix></filter><svg filter="url(#ec)">'; filters['marilyn'] = '<filter id="marilyn"><feColorMatrix type="matrix" values="1 0 0 1.7 -1.6 0 1 0 0.0 0.3 -0.7 0 1 0 0.5 0 0 0 1 0.2"></feColorMatrix></filter><svg filter="url(#marilyn)">'; filters['brillo'] = '<filter id="brillo"><feColorMatrix type="matrix" values="0 1.0 0 0 0 0 1.0 0 0 0 0 0.6 1 0 0 0 0 0 1 0 "/></filter><svg filter="url(#brillo)">'; filters['b&w'] = '<filter id="bw"><feColorMatrix type="matrix" values="0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 1 0 "/></filter><svg filter="url(#bw)">'; filterNames = ['og', 'campbells', 'electric-chair', 'marilyn', 'brillo', 'b&w']; ownerSaleEnd = block.timestamp + 7 days; } function addFilter(string memory name, string memory filter) public onlyOwner { filterNames.push(name); filters[name] = filter; } function setEditingAllowed(bool allowed) public onlyOwner { editingAllowed = allowed; } function listFilters() public view returns(string[] memory) { return filterNames; } function filtersFor(uint256 tokenId) public view returns (FilterMatrix memory) { return filterMap[tokenId]; } function ownerMint( uint256 tokenId, string memory filter1, string memory filter2, string memory filter3) public payable { if (block.timestamp <= ownerSaleEnd){ require(msg.value == MINT_PRICE, "Bp:oM:402"); require(msg.sender == IBlitmap(BLITMAP_ADDRESS).ownerOf(tokenId), "Bp:oM:403"); } if (block.timestamp > ownerSaleEnd) { require(msg.sender == owner(), "Bp:oM:403"); } filterMap[tokenId] = FilterMatrix({ revisions: 0, filter1: filter1, filter2: filter2, filter3: filter3 }); _safeMint(msg.sender, tokenId); } function updateFilters( uint256 tokenId, string memory filter1, string memory filter2, string memory filter3 ) public { require(editingAllowed, "Bp:uF:400"); require(msg.sender == ownerOf(tokenId), "Bp:uF:403"); filterMap[tokenId] = FilterMatrix({ revisions: filterMap[tokenId].revisions + 1, filter1: filter1, filter2: filter2, filter3: filter3 }); } /* solhint-disable quotes */ function tokenURI(uint256 tokenId) public view override returns (string memory) { require(_exists(tokenId), "Bp:tU:404"); FilterMatrix memory tokenFilters = filterMap[tokenId]; return string( abi.encodePacked( "data:application/json;base64,", Base64.encode( bytes( abi.encodePacked( '{"name":"Blitpop ', IBlitmap(BLITMAP_ADDRESS).tokenNameOf(tokenId), '", "description":"Blitpops are onchain Blitmap derivatives. To construct the artwork, the original Blitmap with corresponding token ID is fetched, collaged and filtered to return a modified onchain SVG.", "image": "', svgBase64Data(tokenId, tokenFilters.filter1, tokenFilters.filter2, tokenFilters.filter3), '", ', tokenProperties(tokenFilters), '"}}' ) ) ) ) ); } function tokenProperties(FilterMatrix memory tokenFilters) internal view returns (bytes memory) { return abi.encodePacked( '"properties": { "revisions": "', tokenFilters.revisions.toString(), '", "Top Right": "', tokenFilters.filter1, '", "Bottom Left": "', tokenFilters.filter2, '", "Bottom Right": "', tokenFilters.filter3 ); } function svgBase64Data( uint256 tokenId, string memory filter1, string memory filter2, string memory filter3 ) public view returns (string memory) { return string( abi.encodePacked( 'data:image/svg+xml;base64,', Base64.encode(svgRaw(tokenId, filter1, filter2, filter3)) ) ); } function svgRaw( uint256 tokenId, string memory filter1, string memory filter2, string memory filter3 ) internal view returns (bytes memory) { string memory viewbox = 'viewBox="0 0 32 32">'; strings.slice memory main = IBlitmap(BLITMAP_ADDRESS).tokenSvgDataOf(tokenId).toSlice(); strings.slice memory start = main.split(viewbox.toSlice()); return abi.encodePacked( '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"><svg viewBox="0 0 32 32" width="32" height="32">', main.toString(), '<svg viewBox="0 0 32 32" width="32" height="32" x="32">', filters[filter1], main.toString(), '</svg><svg viewBox="0 0 32 32" width="32" height="32" y="32">', filters[filter2], main.toString(), '</svg><svg viewBox="0 0 32 32" width="32" height="32" x="32" y="32">', filters[filter3], main.toString(), '</svg></svg>' ); } function royaltyInfo( uint256 tokenId, uint256 value, bytes calldata _data ) external view returns (address _receiver, uint256 royaltyAmount) { royaltyAmount = (value * ROYALTY_AMOUNT) / 100; return (owner(), royaltyAmount); } function withdraw() public onlyOwner { payable(msg.sender).transfer(address(this).balance); } function supportsInterface(bytes4 interfaceId) public view override(ERC165Storage, ERC721Enumerable) returns (bool) { return ERC721Enumerable.supportsInterface(interfaceId) || ERC165Storage.supportsInterface(interfaceId); } }
// SPDX-License-Identifier: MIT 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() { _setOwner(_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 { _setOwner(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"); _setOwner(newOwner); } function _setOwner(address newOwner) private { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../ERC721.sol"; import "./IERC721Enumerable.sol"; /** * @dev This implements an optional extension of {ERC721} defined in the EIP that adds * enumerability of all the token ids in the contract as well as all token ids owned by each * account. */ abstract contract ERC721Enumerable is ERC721, IERC721Enumerable { // Mapping from owner to list of owned token IDs mapping(address => mapping(uint256 => uint256)) private _ownedTokens; // Mapping from token ID to index of the owner tokens list mapping(uint256 => uint256) private _ownedTokensIndex; // Array with all token ids, used for enumeration uint256[] private _allTokens; // Mapping from token id to position in the allTokens array mapping(uint256 => uint256) private _allTokensIndex; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) { return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) { require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds"); return _ownedTokens[owner][index]; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _allTokens.length; } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view virtual override returns (uint256) { require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds"); return _allTokens[index]; } /** * @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); if (from == address(0)) { _addTokenToAllTokensEnumeration(tokenId); } else if (from != to) { _removeTokenFromOwnerEnumeration(from, tokenId); } if (to == address(0)) { _removeTokenFromAllTokensEnumeration(tokenId); } else if (to != from) { _addTokenToOwnerEnumeration(to, tokenId); } } /** * @dev Private function to add a token to this extension's ownership-tracking data structures. * @param to address representing the new owner of the given token ID * @param tokenId uint256 ID of the token to be added to the tokens list of the given address */ function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private { uint256 length = ERC721.balanceOf(to); _ownedTokens[to][length] = tokenId; _ownedTokensIndex[tokenId] = length; } /** * @dev Private function to add a token to this extension's token tracking data structures. * @param tokenId uint256 ID of the token to be added to the tokens list */ function _addTokenToAllTokensEnumeration(uint256 tokenId) private { _allTokensIndex[tokenId] = _allTokens.length; _allTokens.push(tokenId); } /** * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for * gas optimizations e.g. when performing a transfer operation (avoiding double writes). * This has O(1) time complexity, but alters the order of the _ownedTokens array. * @param from address representing the previous owner of the given token ID * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address */ function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private { // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = ERC721.balanceOf(from) - 1; uint256 tokenIndex = _ownedTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary if (tokenIndex != lastTokenIndex) { uint256 lastTokenId = _ownedTokens[from][lastTokenIndex]; _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index } // This also deletes the contents at the last position of the array delete _ownedTokensIndex[tokenId]; delete _ownedTokens[from][lastTokenIndex]; } /** * @dev Private function to remove a token from this extension's token tracking data structures. * This has O(1) time complexity, but alters the order of the _allTokens array. * @param tokenId uint256 ID of the token to be removed from the tokens list */ function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private { // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = _allTokens.length - 1; uint256 tokenIndex = _allTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding // an 'if' statement (like in _removeTokenFromOwnerEnumeration) uint256 lastTokenId = _allTokens[lastTokenIndex]; _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index // This also deletes the contents at the last position of the array delete _allTokensIndex[tokenId]; _allTokens.pop(); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./ERC165.sol"; /** * @dev Storage based implementation of the {IERC165} interface. * * Contracts may inherit from this and call {_registerInterface} to declare * their support of an interface. */ abstract contract ERC165Storage is ERC165 { /** * @dev Mapping of interface ids to whether or not it's supported. */ mapping(bytes4 => bool) private _supportedInterfaces; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return super.supportsInterface(interfaceId) || _supportedInterfaces[interfaceId]; } /** * @dev Registers the contract as an implementer of the interface defined by * `interfaceId`. Support of the actual ERC165 interface is automatic and * registering its interface id is not required. * * See {IERC165-supportsInterface}. * * Requirements: * * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`). */ function _registerInterface(bytes4 interfaceId) internal virtual { require(interfaceId != 0xffffffff, "ERC165: invalid interface id"); _supportedInterfaces[interfaceId] = true; } }
// SPDX-License-Identifier: MIT 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 pragma solidity >=0.8.0; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; interface IBlitmap is IERC721 { function tokenNameOf(uint256 tokenId) external view returns (string memory); function tokenSvgDataOf(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; /// @title Base64 /// @notice Provides a function for encoding some bytes in base64 /// @author Brecht Devos <[email protected]> library Base64 { bytes internal constant TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; /// @notice Encodes some bytes to the base64 representation function encode(bytes memory data) internal pure returns (string memory) { uint256 len = data.length; if (len == 0) return ""; // multiply by 4/3 rounded up uint256 encodedLen = 4 * ((len + 2) / 3); // Add some extra buffer at the end bytes memory result = new bytes(encodedLen + 32); bytes memory table = TABLE; assembly { let tablePtr := add(table, 1) let resultPtr := add(result, 32) for { let i := 0 } lt(i, len) { } { i := add(i, 3) let input := and(mload(add(data, i)), 0xffffff) let out := mload(add(tablePtr, and(shr(18, input), 0x3F))) out := shl(8, out) out := add(out, and(mload(add(tablePtr, and(shr(12, input), 0x3F))), 0xFF)) out := shl(8, out) out := add(out, and(mload(add(tablePtr, and(shr(6, input), 0x3F))), 0xFF)) out := shl(8, out) out := add(out, and(mload(add(tablePtr, and(input, 0x3F))), 0xFF)) out := shl(224, out) mstore(resultPtr, out) resultPtr := add(resultPtr, 4) } switch mod(len, 3) case 1 { mstore(sub(resultPtr, 2), shl(240, 0x3d3d)) } case 2 { mstore(sub(resultPtr, 1), shl(248, 0x3d)) } mstore(result, encodedLen) } return string(result); } }
/* * @title String & slice utility library for Solidity contracts. * @author Nick Johnson <[email protected]> * * @dev Functionality in this library is largely implemented using an * abstraction called a 'slice'. A slice represents a part of a string - * anything from the entire string to a single character, or even no * characters at all (a 0-length slice). Since a slice only has to specify * an offset and a length, copying and manipulating slices is a lot less * expensive than copying and manipulating the strings they reference. * * To further reduce gas costs, most functions on slice that need to return * a slice modify the original one instead of allocating a new one; for * instance, `s.split(".")` will return the text up to the first '.', * modifying s to only contain the remainder of the string after the '.'. * In situations where you do not want to modify the original slice, you * can make a copy first with `.copy()`, for example: * `s.copy().split(".")`. Try and avoid using this idiom in loops; since * Solidity has no memory management, it will result in allocating many * short-lived slices that are later discarded. * * Functions that return two slices come in two versions: a non-allocating * version that takes the second slice as an argument, modifying it in * place, and an allocating version that allocates and returns the second * slice; see `nextRune` for example. * * Functions that have to copy string data will return strings rather than * slices; these can be cast back to slices for further processing if * required. * * For convenience, some functions are provided with non-modifying * variants that create a new slice and return both; for instance, * `s.splitNew('.')` leaves s unmodified, and returns two values * corresponding to the left and right parts of the string. */ pragma solidity >=0.8.0; library strings { struct slice { uint _len; uint _ptr; } function memcpy(uint dest, uint src, uint len) private pure { // Copy word-length chunks while possible for(; len >= 32; len -= 32) { assembly { mstore(dest, mload(src)) } dest += 32; src += 32; } // Copy remaining bytes uint mask = 256 ** (32 - len) - 1; assembly { let srcpart := and(mload(src), not(mask)) let destpart := and(mload(dest), mask) mstore(dest, or(destpart, srcpart)) } } /* * @dev Returns a slice containing the entire string. * @param self The string to make a slice from. * @return A newly allocated slice containing the entire string. */ function toSlice(string memory self) internal pure returns (slice memory) { uint ptr; assembly { ptr := add(self, 0x20) } return slice(bytes(self).length, ptr); } /* * @dev Returns the length of a null-terminated bytes32 string. * @param self The value to find the length of. * @return The length of the string, from 0 to 32. */ function len(bytes32 self) internal pure returns (uint) { uint ret; if (self == 0) return 0; if (uint(self) & 0xffffffffffffffffffffffffffffffff == 0) { ret += 16; self = bytes32(uint(self) / 0x100000000000000000000000000000000); } if (uint(self) & 0xffffffffffffffff == 0) { ret += 8; self = bytes32(uint(self) / 0x10000000000000000); } if (uint(self) & 0xffffffff == 0) { ret += 4; self = bytes32(uint(self) / 0x100000000); } if (uint(self) & 0xffff == 0) { ret += 2; self = bytes32(uint(self) / 0x10000); } if (uint(self) & 0xff == 0) { ret += 1; } return 32 - ret; } /* * @dev Returns a slice containing the entire bytes32, interpreted as a * null-terminated utf-8 string. * @param self The bytes32 value to convert to a slice. * @return A new slice containing the value of the input argument up to the * first null. */ function toSliceB32(bytes32 self) internal pure returns (slice memory ret) { // Allocate space for `self` in memory, copy it there, and point ret at it assembly { let ptr := mload(0x40) mstore(0x40, add(ptr, 0x20)) mstore(ptr, self) mstore(add(ret, 0x20), ptr) } ret._len = len(self); } /* * @dev Returns a new slice containing the same data as the current slice. * @param self The slice to copy. * @return A new slice containing the same data as `self`. */ function copy(slice memory self) internal pure returns (slice memory) { return slice(self._len, self._ptr); } /* * @dev Copies a slice to a new string. * @param self The slice to copy. * @return A newly allocated string containing the slice's text. */ function toString(slice memory self) internal pure returns (string memory) { string memory ret = new string(self._len); uint retptr; assembly { retptr := add(ret, 32) } memcpy(retptr, self._ptr, self._len); return ret; } /* * @dev Returns the length in runes of the slice. Note that this operation * takes time proportional to the length of the slice; avoid using it * in loops, and call `slice.empty()` if you only need to know whether * the slice is empty or not. * @param self The slice to operate on. * @return The length of the slice in runes. */ function len(slice memory self) internal pure returns (uint l) { // Starting at ptr-31 means the LSB will be the byte we care about uint ptr = self._ptr - 31; uint end = ptr + self._len; for (l = 0; ptr < end; l++) { uint8 b; assembly { b := and(mload(ptr), 0xFF) } if (b < 0x80) { ptr += 1; } else if(b < 0xE0) { ptr += 2; } else if(b < 0xF0) { ptr += 3; } else if(b < 0xF8) { ptr += 4; } else if(b < 0xFC) { ptr += 5; } else { ptr += 6; } } } /* * @dev Returns true if the slice is empty (has a length of 0). * @param self The slice to operate on. * @return True if the slice is empty, False otherwise. */ function empty(slice memory self) internal pure returns (bool) { return self._len == 0; } /* * @dev Returns a positive number if `other` comes lexicographically after * `self`, a negative number if it comes before, or zero if the * contents of the two slices are equal. Comparison is done per-rune, * on unicode codepoints. * @param self The first slice to compare. * @param other The second slice to compare. * @return The result of the comparison. */ function compare(slice memory self, slice memory other) internal pure returns (int) { uint shortest = self._len; if (other._len < self._len) shortest = other._len; uint selfptr = self._ptr; uint otherptr = other._ptr; for (uint idx = 0; idx < shortest; idx += 32) { int a; int b; assembly { a := mload(selfptr) b := mload(otherptr) } if (a != b) { // Mask out irrelevant bytes and check again int256 mask = int256(-1); // 0xffff... if(shortest < 32) { mask = int256(~(2 ** (8 * (32 - shortest + idx)) - 1)); } int256 diff = (a & mask) - (b & mask); if (diff != 0) return int(diff); } selfptr += 32; otherptr += 32; } return int(self._len) - int(other._len); } /* * @dev Returns true if the two slices contain the same text. * @param self The first slice to compare. * @param self The second slice to compare. * @return True if the slices are equal, false otherwise. */ function equals(slice memory self, slice memory other) internal pure returns (bool) { return compare(self, other) == 0; } /* * @dev Extracts the first rune in the slice into `rune`, advancing the * slice to point to the next rune and returning `self`. * @param self The slice to operate on. * @param rune The slice that will contain the first rune. * @return `rune`. */ function nextRune(slice memory self, slice memory rune) internal pure returns (slice memory) { rune._ptr = self._ptr; if (self._len == 0) { rune._len = 0; return rune; } uint l; uint b; // Load the first byte of the rune into the LSBs of b assembly { b := and(mload(sub(mload(add(self, 32)), 31)), 0xFF) } if (b < 0x80) { l = 1; } else if(b < 0xE0) { l = 2; } else if(b < 0xF0) { l = 3; } else { l = 4; } // Check for truncated codepoints if (l > self._len) { rune._len = self._len; self._ptr += self._len; self._len = 0; return rune; } self._ptr += l; self._len -= l; rune._len = l; return rune; } /* * @dev Returns the first rune in the slice, advancing the slice to point * to the next rune. * @param self The slice to operate on. * @return A slice containing only the first rune from `self`. */ function nextRune(slice memory self) internal pure returns (slice memory ret) { nextRune(self, ret); } /* * @dev Returns the number of the first codepoint in the slice. * @param self The slice to operate on. * @return The number of the first codepoint in the slice. */ function ord(slice memory self) internal pure returns (uint ret) { if (self._len == 0) { return 0; } uint word; uint length; uint divisor = 2 ** 248; // Load the rune into the MSBs of b assembly { word:= mload(mload(add(self, 32))) } uint b = word / divisor; if (b < 0x80) { ret = b; length = 1; } else if(b < 0xE0) { ret = b & 0x1F; length = 2; } else if(b < 0xF0) { ret = b & 0x0F; length = 3; } else { ret = b & 0x07; length = 4; } // Check for truncated codepoints if (length > self._len) { return 0; } for (uint i = 1; i < length; i++) { divisor = divisor / 256; b = (word / divisor) & 0xFF; if (b & 0xC0 != 0x80) { // Invalid UTF-8 sequence return 0; } ret = (ret * 64) | (b & 0x3F); } return ret; } /* * @dev Returns the keccak-256 hash of the slice. * @param self The slice to hash. * @return The hash of the slice. */ function keccak(slice memory self) internal pure returns (bytes32 ret) { assembly { ret := keccak256(mload(add(self, 32)), mload(self)) } } /* * @dev Returns true if `self` starts with `needle`. * @param self The slice to operate on. * @param needle The slice to search for. * @return True if the slice starts with the provided text, false otherwise. */ function startsWith(slice memory self, slice memory needle) internal pure returns (bool) { if (self._len < needle._len) { return false; } if (self._ptr == needle._ptr) { return true; } bool equal; assembly { let length := mload(needle) let selfptr := mload(add(self, 0x20)) let needleptr := mload(add(needle, 0x20)) equal := eq(keccak256(selfptr, length), keccak256(needleptr, length)) } return equal; } /* * @dev If `self` starts with `needle`, `needle` is removed from the * beginning of `self`. Otherwise, `self` is unmodified. * @param self The slice to operate on. * @param needle The slice to search for. * @return `self` */ function beyond(slice memory self, slice memory needle) internal pure returns (slice memory) { if (self._len < needle._len) { return self; } bool equal = true; if (self._ptr != needle._ptr) { assembly { let length := mload(needle) let selfptr := mload(add(self, 0x20)) let needleptr := mload(add(needle, 0x20)) equal := eq(keccak256(selfptr, length), keccak256(needleptr, length)) } } if (equal) { self._len -= needle._len; self._ptr += needle._len; } return self; } /* * @dev Returns true if the slice ends with `needle`. * @param self The slice to operate on. * @param needle The slice to search for. * @return True if the slice starts with the provided text, false otherwise. */ function endsWith(slice memory self, slice memory needle) internal pure returns (bool) { if (self._len < needle._len) { return false; } uint selfptr = self._ptr + self._len - needle._len; if (selfptr == needle._ptr) { return true; } bool equal; assembly { let length := mload(needle) let needleptr := mload(add(needle, 0x20)) equal := eq(keccak256(selfptr, length), keccak256(needleptr, length)) } return equal; } /* * @dev If `self` ends with `needle`, `needle` is removed from the * end of `self`. Otherwise, `self` is unmodified. * @param self The slice to operate on. * @param needle The slice to search for. * @return `self` */ function until(slice memory self, slice memory needle) internal pure returns (slice memory) { if (self._len < needle._len) { return self; } uint selfptr = self._ptr + self._len - needle._len; bool equal = true; if (selfptr != needle._ptr) { assembly { let length := mload(needle) let needleptr := mload(add(needle, 0x20)) equal := eq(keccak256(selfptr, length), keccak256(needleptr, length)) } } if (equal) { self._len -= needle._len; } return self; } // Returns the memory address of the first byte of the first occurrence of // `needle` in `self`, or the first byte after `self` if not found. function findPtr(uint selflen, uint selfptr, uint needlelen, uint needleptr) private pure returns (uint) { uint ptr = selfptr; uint idx; if (needlelen <= selflen) { if (needlelen <= 32) { bytes32 mask = bytes32(~(2 ** (8 * (32 - needlelen)) - 1)); bytes32 needledata; assembly { needledata := and(mload(needleptr), mask) } uint end = selfptr + selflen - needlelen; bytes32 ptrdata; assembly { ptrdata := and(mload(ptr), mask) } while (ptrdata != needledata) { if (ptr >= end) return selfptr + selflen; ptr++; assembly { ptrdata := and(mload(ptr), mask) } } return ptr; } else { // For long needles, use hashing bytes32 hash; assembly { hash := keccak256(needleptr, needlelen) } for (idx = 0; idx <= selflen - needlelen; idx++) { bytes32 testHash; assembly { testHash := keccak256(ptr, needlelen) } if (hash == testHash) return ptr; ptr += 1; } } } return selfptr + selflen; } // Returns the memory address of the first byte after the last occurrence of // `needle` in `self`, or the address of `self` if not found. function rfindPtr(uint selflen, uint selfptr, uint needlelen, uint needleptr) private pure returns (uint) { uint ptr; if (needlelen <= selflen) { if (needlelen <= 32) { bytes32 mask = bytes32(~(2 ** (8 * (32 - needlelen)) - 1)); bytes32 needledata; assembly { needledata := and(mload(needleptr), mask) } ptr = selfptr + selflen - needlelen; bytes32 ptrdata; assembly { ptrdata := and(mload(ptr), mask) } while (ptrdata != needledata) { if (ptr <= selfptr) return selfptr; ptr--; assembly { ptrdata := and(mload(ptr), mask) } } return ptr + needlelen; } else { // For long needles, use hashing bytes32 hash; assembly { hash := keccak256(needleptr, needlelen) } ptr = selfptr + (selflen - needlelen); while (ptr >= selfptr) { bytes32 testHash; assembly { testHash := keccak256(ptr, needlelen) } if (hash == testHash) return ptr + needlelen; ptr -= 1; } } } return selfptr; } /* * @dev Modifies `self` to contain everything from the first occurrence of * `needle` to the end of the slice. `self` is set to the empty slice * if `needle` is not found. * @param self The slice to search and modify. * @param needle The text to search for. * @return `self`. */ function find(slice memory self, slice memory needle) internal pure returns (slice memory) { uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr); self._len -= ptr - self._ptr; self._ptr = ptr; return self; } /* * @dev Modifies `self` to contain the part of the string from the start of * `self` to the end of the first occurrence of `needle`. If `needle` * is not found, `self` is set to the empty slice. * @param self The slice to search and modify. * @param needle The text to search for. * @return `self`. */ function rfind(slice memory self, slice memory needle) internal pure returns (slice memory) { uint ptr = rfindPtr(self._len, self._ptr, needle._len, needle._ptr); self._len = ptr - self._ptr; return self; } /* * @dev Splits the slice, setting `self` to everything after the first * occurrence of `needle`, and `token` to everything before it. If * `needle` does not occur in `self`, `self` is set to the empty slice, * and `token` is set to the entirety of `self`. * @param self The slice to split. * @param needle The text to search for in `self`. * @param token An output parameter to which the first token is written. * @return `token`. */ function split(slice memory self, slice memory needle, slice memory token) internal pure returns (slice memory) { uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr); token._ptr = self._ptr; token._len = ptr - self._ptr; if (ptr == self._ptr + self._len) { // Not found self._len = 0; } else { self._len -= token._len + needle._len; self._ptr = ptr + needle._len; } return token; } /* * @dev Splits the slice, setting `self` to everything after the first * occurrence of `needle`, and returning everything before it. If * `needle` does not occur in `self`, `self` is set to the empty slice, * and the entirety of `self` is returned. * @param self The slice to split. * @param needle The text to search for in `self`. * @return The part of `self` up to the first occurrence of `delim`. */ function split(slice memory self, slice memory needle) internal pure returns (slice memory token) { split(self, needle, token); } /* * @dev Splits the slice, setting `self` to everything before the last * occurrence of `needle`, and `token` to everything after it. If * `needle` does not occur in `self`, `self` is set to the empty slice, * and `token` is set to the entirety of `self`. * @param self The slice to split. * @param needle The text to search for in `self`. * @param token An output parameter to which the first token is written. * @return `token`. */ function rsplit(slice memory self, slice memory needle, slice memory token) internal pure returns (slice memory) { uint ptr = rfindPtr(self._len, self._ptr, needle._len, needle._ptr); token._ptr = ptr; token._len = self._len - (ptr - self._ptr); if (ptr == self._ptr) { // Not found self._len = 0; } else { self._len -= token._len + needle._len; } return token; } /* * @dev Splits the slice, setting `self` to everything before the last * occurrence of `needle`, and returning everything after it. If * `needle` does not occur in `self`, `self` is set to the empty slice, * and the entirety of `self` is returned. * @param self The slice to split. * @param needle The text to search for in `self`. * @return The part of `self` after the last occurrence of `delim`. */ function rsplit(slice memory self, slice memory needle) internal pure returns (slice memory token) { rsplit(self, needle, token); } /* * @dev Counts the number of nonoverlapping occurrences of `needle` in `self`. * @param self The slice to search. * @param needle The text to search for in `self`. * @return The number of occurrences of `needle` found in `self`. */ function count(slice memory self, slice memory needle) internal pure returns (uint cnt) { uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr) + needle._len; while (ptr <= self._ptr + self._len) { cnt++; ptr = findPtr(self._len - (ptr - self._ptr), ptr, needle._len, needle._ptr) + needle._len; } } /* * @dev Returns True if `self` contains `needle`. * @param self The slice to search. * @param needle The text to search for in `self`. * @return True if `needle` is found in `self`, false otherwise. */ function contains(slice memory self, slice memory needle) internal pure returns (bool) { return rfindPtr(self._len, self._ptr, needle._len, needle._ptr) != self._ptr; } /* * @dev Returns a newly allocated string containing the concatenation of * `self` and `other`. * @param self The first slice to concatenate. * @param other The second slice to concatenate. * @return The concatenation of the two strings. */ function concat(slice memory self, slice memory other) internal pure returns (string memory) { string memory ret = new string(self._len + other._len); uint retptr; assembly { retptr := add(ret, 32) } memcpy(retptr, self._ptr, self._len); memcpy(retptr + self._len, other._ptr, other._len); return ret; } /* * @dev Joins an array of slices, using `self` as a delimiter, returning a * newly allocated string. * @param self The delimiter to use. * @param parts A list of slices to join. * @return A newly allocated string containing all the slices in `parts`, * joined with `self`. */ function join(slice memory self, slice[] memory parts) internal pure returns (string memory) { if (parts.length == 0) return ""; uint length = self._len * (parts.length - 1); for(uint i = 0; i < parts.length; i++) length += parts[i]._len; string memory ret = new string(length); uint retptr; assembly { retptr := add(ret, 32) } for(uint i = 0; i < parts.length; i++) { memcpy(retptr, parts[i]._ptr, parts[i]._len); retptr += parts[i]._len; if (i < parts.length - 1) { memcpy(retptr, self._ptr, self._len); retptr += self._len; } } return ret; } }
// SPDX-License-Identifier: MIT 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 pragma solidity ^0.8.0; import "./IERC721.sol"; import "./IERC721Receiver.sol"; import "./extensions/IERC721Metadata.sol"; import "../../utils/Address.sol"; import "../../utils/Context.sol"; import "../../utils/Strings.sol"; import "../../utils/introspection/ERC165.sol"; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _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 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 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 overriden 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 = ERC721.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 { require(operator != _msgSender(), "ERC721: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //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 = ERC721.ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, 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); } /** * @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 = ERC721.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); } /** * @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(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @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 {} }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); }
// SPDX-License-Identifier: MIT 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`, 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 Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @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 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); /** * @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; }
// SPDX-License-Identifier: MIT 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 `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT 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 pragma solidity ^0.8.0; /** * @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 * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 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 pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import {IBlitmap} from "../Interfaces/IBlitmap.sol"; import {Base64} from "../Base64.sol"; import {strings} from "../StringUtils.sol"; contract MockBlitmap is ERC721, Ownable { constructor() payable ERC721("MockBlitmap", "BLIT") {} function tokenNameOf(uint256 _tokenId) public view returns (string memory) { return "Mock Blitmap"; } function tokenSvgDataOf(uint256 tokenId) public view returns (string memory) { return '<?xml version="1.0" encoding="UTF-8" standalone="no"?><svg xmlns="http://www.w3.org/2000/svg" version="1.1" viewBox="0 0 32 32"><rect fill="#000000" x="0" y="0" width="1.5" height="1.5" /><rect fill="#000000" x="1" y="0" width="1.5" height="1.5" /><rect fill="#000000" x="2" y="0" width="1.5" height="1.5" /></svg>'; } function ownerOf(uint256 tokenId) public override view returns (address) { return tx.origin; } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} }
Contract Security Audit
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,"type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"string","name":"filter1","type":"string"},{"internalType":"string","name":"filter2","type":"string"},{"internalType":"string","name":"filter3","type":"string"}],"name":"updateFilters","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000008d04a8c79ceb0889bdd12acdf3fa9d207ed3ff63
-----Decoded View---------------
Arg [0] : blitmapAddress (address): 0x8d04a8c79cEB0889Bdd12acdF3Fa9D207eD3Ff63
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000008d04a8c79ceb0889bdd12acdf3fa9d207ed3ff63
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Multichain Portfolio | 26 Chains
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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.