ERC-721
Overview
Max Total Supply
545 CAIC
Holders
248
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
2 CAICLoading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
CaicGrids
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/utils/Strings.sol'; import './CAIC.sol'; import './Randomize.sol'; import "./IBMP.sol"; /// @title CaicGrids /// @author tfs128 (@trickerfs128) contract CaicGrids is CAIC { using Strings for uint256; using Strings for uint32; using Randomize for Randomize.Random; IBMP public immutable _bmp; /// @notice constructor /// @param contractURI can be empty /// @param openseaProxyRegistry can be address zero /// @param bmp encoder address constructor( string memory contractURI, address openseaProxyRegistry, address bmp ) CAIC(contractURI, openseaProxyRegistry) { _bmp = IBMP(bmp); } /// @dev Rendering function; should be overrode /// @param tokenId the tokenId /// @param seed the seed /// @param isSvg true=svg, false=base64 encoded function _render(uint256 tokenId, bytes32 seed, bool isSvg) internal view override returns (string memory) { Randomize.Random memory random = Randomize.Random({ seed: uint256(seed), offsetBit: 0 }); uint256 rule = random.next(1,255); bytes memory pixels = getCells(rule,random); bytes memory bmpImage = _bmp.bmp(pixels,SIZE,SIZE,_bmp.grayscale()); if(isSvg == true) { string memory sizeInString = SIZE.toString(); bytes memory image = abi.encodePacked( '"image":"data:image/svg+xml;utf8,', "<svg xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' height='",sizeInString,"' width='",sizeInString,"'>" "<image style='image-rendering: pixelated;' height='",sizeInString,"' width='",sizeInString,"' xlink:href='",_bmp.bmpDataURI(bmpImage),"'></image>", '</svg>"' ); return string(abi.encodePacked( 'data:application/json;utf8,' '{"name":"Grid #',tokenId.toString(),'",', '"description":"A grid completely generated onchain using 1D cellular automaton.",', '"properties":{ "Rule":"',rule.toString(),'"},', image, '}' )); } else { return string(abi.encodePacked( _bmp.bmpDataURI(bmpImage) )); } } /// @notice Gas eater function, to generate cells on grid /// @param rule CA rule 1-255 /// @param random to generate random initial row. function getCells(uint256 rule, Randomize.Random memory random) internal view returns(bytes memory) { unchecked { bytes memory pixels = new bytes(uint256(SIZE * SIZE)); bytes memory oldRow = new bytes(SIZE); uint256 x; for(x=1; x < SIZE; x++) { uint256 random = random.next(1,255); oldRow[x] = random % 2 == 0 ? bytes1(uint8(1)) : bytes1(uint8(0)); } uint8 increment; if(SIZE <= 256) { increment = 3; } else if(SIZE <= 384) { increment = 2; } else { increment = 1; } for(uint256 y=0; y< SIZE; y+=4) { bytes memory newRow = new bytes(uint256(SIZE)); uint8 gr = 0; for(x = 0; x < SIZE; x+=4) { gr += increment; bytes1 px = uint8(oldRow[x]) == 1 ? bytes1(uint8(1)) : bytes1(uint8(255-gr)); { uint yp1 = y + 1; uint yp2 = y + 2; uint xp1 = x + 1; uint xp2 = x + 2; pixels[y * SIZE + x ] = px; pixels[y * SIZE + xp1] = px; pixels[y * SIZE + xp2] = px; pixels[ yp1 * SIZE + x ] = px; pixels[ yp1 * SIZE + xp1] = px; pixels[ yp1 * SIZE + xp2] = px; pixels[ yp2 * SIZE + x ] = px; pixels[ yp2 * SIZE + xp1] = px; pixels[ yp2 * SIZE + xp2] = px; } uint8 combine; if(x == 0) { combine = (uint8(1) << 2) + (uint8(oldRow[x]) << 1) + (uint8(oldRow[x+4]) << 0); } else if(x == SIZE - 4) { combine = (uint8(oldRow[x-4]) << 2) + (uint8(oldRow[x]) << 1) + (uint8(1) << 0); } else { combine = (uint8(oldRow[x-4]) << 2) + (uint8(oldRow[x]) << 1) + (uint8(oldRow[x+4]) << 0); } uint8 nValue = ( uint8(rule) >> combine ) & 1; newRow[x] = nValue == 1 ? bytes1(uint8(1)) : bytes1(uint8(0)); } oldRow = newRow; } return pixels; } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant alphabet = "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] = alphabet[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
//SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import './BaseOpenSea.sol'; import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol"; import '@openzeppelin/contracts/security/ReentrancyGuard.sol'; import '@openzeppelin/contracts/access/Ownable.sol'; /// @title CAIC (Cellular Automaton In Chain) /// @author Tfs128 (@trickerfs128) /// @dev most of the code borrowed from [sol]Seedlings contract written by Simon Fremaux (@dievardump) contract CAIC is BaseOpenSea, ERC721Enumerable,Ownable,ReentrancyGuard { event SeedChangeRequest(uint256 indexed tokenId, address indexed operator); event Collected(address indexed operator, uint256 indexed count,uint256 value); event Claimed(address indexed operator); event SizeUpdated(uint32 size); // Last Token Id Generated. uint256 public LAST_TOKEN_ID; //public minting start time. uint256 public PUBLIC_MINTING_TIME = block.timestamp + 36 hours; // 0.00768 uint256 public PRICE = 7680000000000000; // Max Available for mint `Available` - `Reserved` uint256 public AVAILABLE = 509; // 257 reserved for blockglyphs holders + 2 for owner uint256 public BG_RESERVED_LEFT = 259; // Max mints allowed in single transaction uint256 public MAX_MINT = 11; // Last Seed Generated bytes32 public LAST_SEED; // Size of image height:=SIZE, width:=SIZE uint32 public SIZE = 256; // each token seed mapping(uint256 => bytes32) internal _tokenSeed; // tokenIds with a request for seeds change mapping(uint256 => bool) private _seedChangeRequests; // blockGlyph holders mapping(address => bool) public _bgHolders; /// @notice constructor /// @param contractURI can be empty /// @param openseaProxyRegistry can be address zero constructor( string memory contractURI, address openseaProxyRegistry ) ERC721('CAIC', 'CAIC') { //CAIC (Cellular Automaton In Chain) if (bytes(contractURI).length > 0) { _setContractURI(contractURI); } if (address(0) != openseaProxyRegistry) { _setOpenSeaRegistry(openseaProxyRegistry); } } /// @notice function to mint `count` token(s) to `msg.sender` /// @param count numbers of tokens function mint(uint256 count) external payable nonReentrant { require (block.timestamp >= PUBLIC_MINTING_TIME, 'Wait'); require(count > 0, 'Must be greater than 0'); require(count <= MAX_MINT, 'More Than Max Allowed.' ); require(count <= AVAILABLE, 'Too Many Requested.'); require(msg.value == PRICE * count , 'Not Enough Amount.'); uint256 tokenId = LAST_TOKEN_ID; bytes32 blockHash = blockhash(block.number - 1); bytes32 nextSeed; for (uint256 i; i < count; i++) { tokenId++; _safeMint(msg.sender, tokenId); nextSeed = keccak256( abi.encodePacked( LAST_SEED, block.timestamp, msg.sender, blockHash, block.coinbase, block.difficulty, tx.gasprice ) ); LAST_SEED = nextSeed; _tokenSeed[tokenId] = nextSeed; } LAST_TOKEN_ID = tokenId; AVAILABLE -= count; emit Collected(msg.sender, count, msg.value); } /// @notice func for free token claim for blockglyph holders function claim() external { require (block.timestamp < PUBLIC_MINTING_TIME, 'You are late.'); //I had made a blunder in previouse deployment, so had to redeploy again. //rather than storing whole reserve list again, will use it from //previouse contract. require (CAIC(0xb742848B5971cE5D0628E351714AF5F1F4e4A8A2)._bgHolders(msg.sender) == true, 'Not a bg holder.'); require (_bgHolders[msg.sender] == false , 'Already claimed.'); uint256 tokenId = LAST_TOKEN_ID + 1; _safeMint(msg.sender, tokenId); bytes32 blockHash = blockhash(block.number - 1); bytes32 nextSeed = keccak256( abi.encodePacked( LAST_SEED, block.timestamp, msg.sender, blockHash, block.coinbase, block.difficulty, tx.gasprice ) ); LAST_TOKEN_ID = tokenId; LAST_SEED = nextSeed; _tokenSeed[tokenId] = nextSeed; BG_RESERVED_LEFT -= 1; _bgHolders[msg.sender] = true; emit Claimed(msg.sender); } /// @notice function to request seed change by token owner. /// @param tokenId of which seed change requested function requestSeedChange(uint256 tokenId) external { require(ownerOf(tokenId) == msg.sender, 'Not token owner.'); _seedChangeRequests[tokenId] = true; emit SeedChangeRequest(tokenId, msg.sender); } /// opensea config (https://docs.opensea.io/docs/contract-level-metadata) function setContractURI(string memory contractURI) external onlyOwner { _setContractURI(contractURI); } ///@notice function to update image res ///@param imageSize height X width = 'imageSize * imageSize' function updateImageSize(uint32 imageSize) external onlyOwner { require(imageSize % 4 == 0, 'Should be a multiple of 4'); require(imageSize > 63 && imageSize < 513, 'Must be between 64-512'); SIZE = imageSize; emit SizeUpdated(imageSize); } /// @dev blockglyphs holders struct. struct bgHolderAddresses { address addr; bool available; } /// @notice function to add blockglyph holders + 2 owner reserved function addBgHolders(bgHolderAddresses[] calldata addresses) external onlyOwner { for (uint i = 0; i < addresses.length; i++) { _bgHolders[addresses[i].addr] = addresses[i].available; } } ///@notice function to respond to seed change requests ///@param tokenId of which seed needs to be change function changeSeedAfterRequest(uint256 tokenId) external onlyOwner { require(_seedChangeRequests[tokenId] == true, 'No request for token.'); _seedChangeRequests[tokenId] = false; _tokenSeed[tokenId] = keccak256( abi.encode( _tokenSeed[tokenId], block.timestamp, block.difficulty, blockhash(block.number - 1) ) ); } /// @notice function to withdraw balance. function withdraw() external onlyOwner { require(address(this).balance > 0, "0 Balance."); bool success; (success, ) = msg.sender.call{value: address(this).balance}(''); require(success, 'Failed'); } /// @notice this function returns the seed associated to a tokenId /// @param tokenId to get the seed of function getTokenSeed(uint256 tokenId) external view returns (bytes32) { require(_exists(tokenId), 'TokenSeed query for nonexistent token'); return _tokenSeed[tokenId]; } /// @notice function to get raw based64 encoded image /// @param tokenId id of token function getRaw(uint256 tokenId) public view returns (string memory) { require( _exists(tokenId), 'Query for nonexistent token' ); return _render(tokenId, _tokenSeed[tokenId],false); } /// @notice tokenURI override that returns a data:json application /// @inheritdoc ERC721 function tokenURI(uint256 tokenId) public view override returns (string memory) { require( _exists(tokenId), 'ERC721Metadata: URI query for nonexistent token' ); return _render(tokenId, _tokenSeed[tokenId],true); } /// @notice Called with the sale price to determine how much royalty /// @param tokenId - the NFT asset queried for royalty information /// @param value - the sale price of the NFT asset specified by _tokenId /// @return receiver - address of who should be sent the royalty payment /// @return royaltyAmount - the royalty payment amount for value sale price function royaltyInfo(uint256 tokenId, uint256 value) public view returns (address receiver, uint256 royaltyAmount) { receiver = owner(); royaltyAmount = (value * 300) / 10000; } /// @notice Function allowing to check the rendering for a given seed /// @param seed the seed to render function renderSeed(bytes32 seed) public view returns (string memory) { return _render(1, seed, false); } /// @dev Rendering function; /// @param tokenId which needs to be render /// @param seed seed which needs to be render /// @param isSvg true=svg, false=base64 encoded function _render(uint256 tokenId, bytes32 seed, bool isSvg) internal view virtual returns (string memory) { seed; return string( abi.encodePacked( 'data:application/json,{"name":"', tokenId, '"}' ) ); } }
//SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // small library to randomize using (min, max, seed, offsetBit etc...) library Randomize { struct Random { uint256 seed; uint256 offsetBit; } /// @notice get an random number between (min and max) using seed and offseting bits /// this function assumes that max is never bigger than 0xffffff (hex color with opacity included) /// @dev this function is simply used to get random number using a seed. /// if does bitshifting operations to try to reuse the same seed as much as possible. /// should be enough for anyth /// @param random the randomizer /// @param min the minimum /// @param max the maximum /// @return result the resulting pseudo random number function next( Random memory random, uint256 min, uint256 max ) internal pure returns (uint256 result) { uint256 newSeed = random.seed; uint256 newOffset = random.offsetBit + 3; uint256 maxOffset = 4; uint256 mask = 0xf; if (max > 0xfffff) { mask = 0xffffff; maxOffset = 24; } else if (max > 0xffff) { mask = 0xfffff; maxOffset = 20; } else if (max > 0xfff) { mask = 0xffff; maxOffset = 16; } else if (max > 0xff) { mask = 0xfff; maxOffset = 12; } else if (max > 0xf) { mask = 0xff; maxOffset = 8; } // if offsetBit is too high to get the max number // just get new seed and restart offset to 0 if (newOffset > (256 - maxOffset)) { newOffset = 0; newSeed = uint256(keccak256(abi.encode(newSeed))); } uint256 offseted = (newSeed >> newOffset); uint256 part = offseted & mask; result = min + (part % (max - min)); random.seed = newSeed; random.offsetBit = newOffset; } function nextInt( Random memory random, uint256 min, uint256 max ) internal pure returns (int256 result) { result = int256(Randomize.next(random, min, max)); } }
// SPDX-License-Identifier: MIT // Copyright 2021 Arran Schlosberg / Twitter @divergence_art pragma solidity >=0.8.0 <0.9.0; /// @title IBMP interface /// @dev interface of BMP.sol originally used in brotchain (0xd31fc221d2b0e0321c43e9f6824b26ebfff01d7d) interface IBMP { /// @notice Returns an 8-bit grayscale palette for bitmap images. function grayscale() external pure returns (bytes memory); /// @notice Returns an 8-bit BMP encoding of the pixels. /// @param pixels bytes array of pixels /// @param width - /// @param height - /// @param palette bytes array function bmp(bytes memory pixels, uint32 width, uint32 height, bytes memory palette) external pure returns (bytes memory); /// @notice Returns the buffer, presumably from bmp(), as a base64 data URI. /// @param bmpBuf encoded bytes of pixels function bmpDataURI(bytes memory bmpBuf) external pure returns (string memory); /// @notice Scale pixels by repetition along both axes. /// @param pixels bytes array of pixels /// @param width - /// @param height - /// @param scale - function scalePixels(bytes memory pixels, uint32 width, uint32 height, uint32 scale) external pure returns (bytes memory); }
//SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /// @title OpenSea contract helper that defines a few things /// @author Simon Fremaux (@dievardump) /// @dev This is a contract used to add OpenSea's support contract BaseOpenSea { string private _contractURI; ProxyRegistry private _proxyRegistry; /// @notice Returns the contract URI function. Used on OpenSea to get details // about a contract (owner, royalties etc...) function contractURI() public view returns (string memory) { return _contractURI; } /// @notice Helper for OpenSea gas-less trading /// @dev Allows to check if `operator` is owner's OpenSea proxy /// @param owner the owner we check for /// @param operator the operator (proxy) we check for function isOwnersOpenSeaProxy(address owner, address operator) public view returns (bool) { ProxyRegistry proxyRegistry = _proxyRegistry; return // we have a proxy registry address address(proxyRegistry) != address(0) && // current operator is owner's proxy address address(proxyRegistry.proxies(owner)) == operator; } /// @dev Internal function to set the _contractURI /// @param contractURI_ the new contract uri function _setContractURI(string memory contractURI_) internal { _contractURI = contractURI_; } /// @dev Internal function to set the _proxyRegistry /// @param proxyRegistryAddress the new proxy registry address function _setOpenSeaRegistry(address proxyRegistryAddress) internal { _proxyRegistry = ProxyRegistry(proxyRegistryAddress); } } contract OwnableDelegateProxy {} contract ProxyRegistry { mapping(address => OwnableDelegateProxy) public proxies; }
// 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; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor () { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// 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 () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), 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 { emit OwnershipTransferred(_owner, address(0)); _owner = 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"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IERC721.sol"; import "./IERC721Receiver.sol"; import "./extensions/IERC721Metadata.sol"; import "./extensions/IERC721Enumerable.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}. 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 || ERC721.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 || ERC721.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(to).onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { // solhint-disable-next-line no-inline-assembly assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @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 { } }
// 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; // solhint-disable-next-line no-inline-assembly 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"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (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"); // solhint-disable-next-line avoid-low-level-calls (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"); // solhint-disable-next-line avoid-low-level-calls (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"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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 // solhint-disable-next-line no-inline-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; /* * @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) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } }
// 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); }
{ "optimizer": { "enabled": true, "runs": 200 }, "evmVersion": "istanbul", "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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IBMP","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"addr","type":"address"},{"internalType":"bool","name":"available","type":"bool"}],"internalType":"struct CAIC.bgHolderAddresses[]","name":"addresses","type":"tuple[]"}],"name":"addBgHolders","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"changeSeedAfterRequest","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"contractURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getRaw","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getTokenSeed","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isOwnersOpenSeaProxy","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"count","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"seed","type":"bytes32"}],"name":"renderSeed","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"requestSeedChange","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"royaltyInfo","outputs":[{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"royaltyAmount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"contractURI","type":"string"}],"name":"setContractURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint2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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000000000000000000000000000000000000000000060000000000000000000000000a5409ec958c83c3f309868babaca7c86dcb077c1000000000000000000000000183c93b6060f997d2d30a10621998fd3a937ea6d0000000000000000000000000000000000000000000000000000000000000044697066733a2f2f697066732f516d52616948625438747977683770543968766378584876436b37774e465041653972544a787a4852324a346d662f636169632e6a736f6e00000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : contractURI (string): ipfs://ipfs/QmRaiHbT8tywh7pT9hvcxXHvCk7wNFPAe9rTJxzHR2J4mf/caic.json
Arg [1] : openseaProxyRegistry (address): 0xa5409ec958C83C3f309868babACA7c86DCB077c1
Arg [2] : bmp (address): 0x183C93B6060f997d2d30a10621998fD3A937ea6d
-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [1] : 000000000000000000000000a5409ec958c83c3f309868babaca7c86dcb077c1
Arg [2] : 000000000000000000000000183c93b6060f997d2d30a10621998fd3a937ea6d
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000044
Arg [4] : 697066733a2f2f697066732f516d526169486254387479776837705439687663
Arg [5] : 78584876436b37774e465041653972544a787a4852324a346d662f636169632e
Arg [6] : 6a736f6e00000000000000000000000000000000000000000000000000000000
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