ERC-721
NFT
Overview
Max Total Supply
5,045 CHECKS
Holders
1,600
Market
Volume (24H)
0.4557 ETH
Min Price (24H)
$336.50 @ 0.127800 ETH
Max Price (24H)
$526.61 @ 0.200000 ETH
Other Info
Token Contract
Balance
1 CHECKSLoading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
Checks
Compiler Version
v0.8.17+commit.8df45f5f
Optimization Enabled:
No with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.17; import "./interfaces/IChecks.sol"; import "./interfaces/IChecksEdition.sol"; import "./libraries/ChecksArt.sol"; import "./libraries/ChecksMetadata.sol"; import "./libraries/Utilities.sol"; import "./standards/CHECKS721.sol"; /** ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓ ✓✓ ✓✓✓✓✓✓✓ ✓✓✓✓✓ ✓✓✓ ✓✓✓✓✓ ✓✓✓✓ ✓✓✓ ✓✓✓✓ ✓✓✓✓✓ ✓✓ ✓✓✓ ✓✓✓✓✓ ✓✓✓✓✓✓✓ ✓✓✓ ✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ @title Checks @author VisualizeValue @notice This artwork is notable. */ contract Checks is IChecks, CHECKS721 { /// @notice The VV Checks Edition contract. IChecksEdition public editionChecks; /// @dev We use this database for persistent storage. Checks checks; /// @dev Initializes the Checks Originals contract and links the Edition contract. constructor() { editionChecks = IChecksEdition(0x34eEBEE6942d8Def3c125458D1a86e0A897fd6f9); checks.day0 = uint32(block.timestamp); checks.epoch = 1; } /// @notice Migrate Checks Editions to Checks Originals by burning the Editions. /// Requires the Approval of this contract on the Edition contract. /// @param tokenIds The Edition token IDs you want to migrate. /// @param recipient The address to receive the tokens. function mint(uint256[] calldata tokenIds, address recipient) external { uint256 count = tokenIds.length; // Initialize new epoch / resolve previous epoch. resolveEpochIfNecessary(); // Burn the Editions for the given tokenIds & mint the Originals. for (uint256 i; i < count;) { uint256 id = tokenIds[i]; address owner = editionChecks.ownerOf(id); // Check whether we're allowed to migrate this Edition. if ( owner != msg.sender && (! editionChecks.isApprovedForAll(owner, msg.sender)) && editionChecks.getApproved(id) != msg.sender ) { revert NotAllowed(); } // Burn the Edition. editionChecks.burn(id); // Initialize our Check. StoredCheck storage check = checks.all[id]; check.day = Utilities.day(checks.day0, block.timestamp); check.epoch = uint32(checks.epoch); check.seed = uint16(id); check.divisorIndex = 0; // Mint the original. // If we're minting to a vault, transfer it there. if (msg.sender != recipient) { _safeMintVia(recipient, msg.sender, id); } else { _safeMint(msg.sender, id); } unchecked { ++i; } } // Keep track of how many checks have been minted. unchecked { checks.minted += uint32(count); } } /// @notice Get a specific check with its genome settings. /// @param tokenId The token ID to fetch. function getCheck(uint256 tokenId) external view returns (Check memory check) { return ChecksArt.getCheck(tokenId, checks); } /// @notice Sacrifice a token to transfer its visual representation to another token. /// @param tokenId The token ID transfer the art into. /// @param burnId The token ID to sacrifice. function inItForTheArt(uint256 tokenId, uint256 burnId) external { _sacrifice(tokenId, burnId); unchecked { ++checks.burned; } } /// @notice Sacrifice multiple tokens to transfer their visual to other tokens. /// @param tokenIds The token IDs to transfer the art into. /// @param burnIds The token IDs to sacrifice. function inItForTheArts(uint256[] calldata tokenIds, uint256[] calldata burnIds) external { uint256 pairs = _multiTokenOperation(tokenIds, burnIds); for (uint256 i; i < pairs;) { _sacrifice(tokenIds[i], burnIds[i]); unchecked { ++i; } } unchecked { checks.burned += uint32(pairs); } } /// @notice Composite one token into another. This mixes the visual and reduces the number of checks. /// @param tokenId The token ID to keep alive. Its visual will change. /// @param burnId The token ID to composite into the tokenId. /// @param swap Swap the visuals before compositing. function composite(uint256 tokenId, uint256 burnId, bool swap) external { // Allow swapping the visuals before executing the composite. if (swap) { StoredCheck memory toKeep = checks.all[tokenId]; checks.all[tokenId] = checks.all[burnId]; checks.all[burnId] = toKeep; } _composite(tokenId, burnId); unchecked { ++checks.burned; } } /// @notice Composite multiple tokens. This mixes the visuals and checks in remaining tokens. /// @param tokenIds The token IDs to keep alive. Their art will change. /// @param burnIds The token IDs to composite. function compositeMany(uint256[] calldata tokenIds, uint256[] calldata burnIds) external { uint256 pairs = _multiTokenOperation(tokenIds, burnIds); for (uint256 i; i < pairs;) { _composite(tokenIds[i], burnIds[i]); unchecked { ++i; } } unchecked { checks.burned += uint32(pairs); } } /// @notice Sacrifice 64 single-check tokens to form a black check. /// @param tokenIds The token IDs to burn for the black check. /// @dev The check at index 0 survives. function infinity(uint256[] calldata tokenIds) external { uint256 count = tokenIds.length; // Make sure we're allowed to mint the black check. if (count != 64) { revert InvalidTokenCount(); } for (uint256 i; i < count;) { uint256 id = tokenIds[i]; if (checks.all[id].divisorIndex != 6) { revert BlackCheck__InvalidCheck(); } if (!_isApprovedOrOwner(msg.sender, id)) { revert NotAllowed(); } unchecked { ++i; } } // Complete final composite. uint256 blackCheckId = tokenIds[0]; StoredCheck storage check = checks.all[blackCheckId]; check.day = Utilities.day(checks.day0, block.timestamp); check.divisorIndex = 7; // Burn all 63 other Checks. for (uint i = 1; i < count;) { _burn(tokenIds[i]); unchecked { ++i; } } unchecked { checks.burned += 63; } // When one is released from the prison of self, that is indeed freedom. // For the most great prison is the prison of self. emit Infinity(blackCheckId, tokenIds[1:]); emit MetadataUpdate(blackCheckId); } /// @notice Burn a check. Note: This burn does not composite or swap tokens. /// @param tokenId The token ID to burn. /// @dev A common purpose burn method. function burn(uint256 tokenId) external { if (! _isApprovedOrOwner(msg.sender, tokenId)) { revert NotAllowed(); } // Perform the burn. _burn(tokenId); // Keep track of supply. unchecked { ++checks.burned; } } /// @notice Initializes and closes epochs. /// @dev Based on the commit-reveal scheme proposed by MouseDev. function resolveEpochIfNecessary() public { Epoch storage currentEpoch = checks.epochs[checks.epoch]; if ( // If epoch has not been committed, currentEpoch.committed == false || // Or the reveal commitment timed out. (currentEpoch.revealed == false && currentEpoch.revealBlock < block.number - 256) ) { // This means the epoch has not been committed, OR the epoch was committed but has expired. // Set committed to true, and record the reveal block: currentEpoch.revealBlock = uint64(block.number + 50); currentEpoch.committed = true; } else if (block.number > currentEpoch.revealBlock) { // Epoch has been committed and is within range to be revealed. // Set its randomness to the target block hash. currentEpoch.randomness = uint128(uint256(keccak256( abi.encodePacked( blockhash(currentEpoch.revealBlock), block.difficulty ))) % (2 ** 128 - 1) ); currentEpoch.revealed = true; // Notify DAPPs about the new epoch. emit NewEpoch(checks.epoch, currentEpoch.revealBlock); // Initialize the next epoch checks.epoch++; resolveEpochIfNecessary(); } } /// @notice The identifier of the current epoch function getEpoch() view public returns(uint256) { return checks.epoch; } /// @notice Get the data for a given epoch /// @param index The identifier of the epoch to fetch function getEpochData(uint256 index) view public returns(Epoch memory) { return checks.epochs[index]; } /// @notice Simulate a composite. /// @param tokenId The token to render. /// @param burnId The token to composite. function simulateComposite(uint256 tokenId, uint256 burnId) public view returns (Check memory check) { _requireMinted(tokenId); _requireMinted(burnId); // We want to simulate for the next divisor check count. uint8 index = checks.all[tokenId].divisorIndex; uint8 nextDivisor = index + 1; check = ChecksArt.getCheck(tokenId, nextDivisor, checks); // Simulate composite tree check.stored.composites[index] = uint16(burnId); // Simulate visual composite in stored data if we have many checks if (index < 5) { (uint8 gradient, uint8 colorBand) = _compositeGenes(tokenId, burnId); check.stored.colorBands[index] = colorBand; check.stored.gradients[index] = gradient; } // Simulate composite in memory data check.composite = !check.isRoot && index < 7 ? check.stored.composites[index] : 0; check.colorBand = ChecksArt.colorBandIndex(check, nextDivisor); check.gradient = ChecksArt.gradientIndex(check, nextDivisor); } /// @notice Render the SVG for a simulated composite. /// @param tokenId The token to render. /// @param burnId The token to composite. function simulateCompositeSVG(uint256 tokenId, uint256 burnId) external view returns (string memory) { return string(ChecksArt.generateSVG(simulateComposite(tokenId, burnId), checks)); } /// @notice Get the colors of all checks in a given token. /// @param tokenId The token ID to get colors for. /// @dev Consider using the ChecksArt and EightyColors Libraries /// in combination with the getCheck function to resolve this yourself. function colors(uint256 tokenId) external view returns (string[] memory, uint256[] memory) { return ChecksArt.colors(ChecksArt.getCheck(tokenId, checks), checks); } /// @notice Render the SVG for a given token. /// @param tokenId The token to render. /// @dev Consider using the ChecksArt Library directly. function svg(uint256 tokenId) external view returns (string memory) { return string(ChecksArt.generateSVG(ChecksArt.getCheck(tokenId, checks), checks)); } /// @notice Get the metadata for a given token. /// @param tokenId The token to render. /// @dev Consider using the ChecksMetadata Library directly. function tokenURI(uint256 tokenId) public view override returns (string memory) { _requireMinted(tokenId); return ChecksMetadata.tokenURI(tokenId, checks); } /// @notice Returns how many tokens this contract manages. function totalSupply() public view returns (uint256) { return checks.minted - checks.burned; } /// @dev Sacrifice one token to transfer its art to another. /// @param tokenId The token ID to keep. /// @param burnId The token ID to burn. function _sacrifice(uint256 tokenId, uint256 burnId) internal { (,StoredCheck storage toBurn,) = _tokenOperation(tokenId, burnId); // Copy over static genome settings checks.all[tokenId] = toBurn; // Update the birth date for this token. checks.all[tokenId].day = Utilities.day(checks.day0, block.timestamp); // Perform the burn. _burn(burnId); // Notify DAPPs about the Sacrifice. emit Sacrifice(burnId, tokenId); emit MetadataUpdate(tokenId); } /// @dev Composite one token into to another and burn it. /// @param tokenId The token ID to keep. Its art and check-count will change. /// @param burnId The token ID to burn in the process. function _composite(uint256 tokenId, uint256 burnId) internal { ( StoredCheck storage toKeep,, uint8 divisorIndex ) = _tokenOperation(tokenId, burnId); uint8 nextDivisor = divisorIndex + 1; // We only need to breed band + gradient up until 4-Checks. if (divisorIndex < 5) { (uint8 gradient, uint8 colorBand) = _compositeGenes(tokenId, burnId); toKeep.colorBands[divisorIndex] = colorBand; toKeep.gradients[divisorIndex] = gradient; } // Composite our check toKeep.day = Utilities.day(checks.day0, block.timestamp); toKeep.composites[divisorIndex] = uint16(burnId); toKeep.divisorIndex = nextDivisor; // Perform the burn. _burn(burnId); // Notify DAPPs about the Composite. emit Composite(tokenId, burnId, ChecksArt.DIVISORS()[toKeep.divisorIndex]); emit MetadataUpdate(tokenId); } /// @dev Composite the gradient and colorBand settings. /// @param tokenId The token ID to keep. /// @param burnId The token ID to burn. function _compositeGenes (uint256 tokenId, uint256 burnId) internal view returns (uint8 gradient, uint8 colorBand) { Check memory keeper = ChecksArt.getCheck(tokenId, checks); Check memory burner = ChecksArt.getCheck(burnId, checks); // Pseudorandom gene manipulation. uint256 randomizer = uint256(keccak256(abi.encodePacked(keeper.seed, burner.seed))); // If at least one token has a gradient, we force it in ~20% of cases. gradient = Utilities.random(randomizer, 100) > 80 ? randomizer % 2 == 0 ? Utilities.minGt0(keeper.gradient, burner.gradient) : Utilities.max(keeper.gradient, burner.gradient) : Utilities.min(keeper.gradient, burner.gradient); // We breed the lower end average color band when breeding. colorBand = Utilities.avg(keeper.colorBand, burner.colorBand); } /// @dev Make sure this is a valid request to composite/switch with multiple tokens. /// @param tokenIds The token IDs to keep. /// @param burnIds The token IDs to burn. function _multiTokenOperation(uint256[] calldata tokenIds, uint256[] calldata burnIds) internal pure returns (uint256 pairs) { pairs = tokenIds.length; if (pairs != burnIds.length) { revert InvalidTokenCount(); } } /// @dev Make sure this is a valid request to composite/switch a token pair. /// @param tokenId The token ID to keep. /// @param burnId The token ID to burn. function _tokenOperation(uint256 tokenId, uint256 burnId) internal view returns ( StoredCheck storage toKeep, StoredCheck storage toBurn, uint8 divisorIndex ) { toKeep = checks.all[tokenId]; toBurn = checks.all[burnId]; divisorIndex = toKeep.divisorIndex; if ( ! _isApprovedOrOwner(msg.sender, tokenId) || ! _isApprovedOrOwner(msg.sender, burnId) || divisorIndex != toBurn.divisorIndex || tokenId == burnId || divisorIndex > 5 ) { revert NotAllowed(); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721 * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must * understand this adds an external call which potentially creates a reentrancy vulnerability. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "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"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or 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 { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // 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 /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Base64.sol) pragma solidity ^0.8.0; /** * @dev Provides a set of functions to operate with Base64 strings. * * _Available since v4.5._ */ library Base64 { /** * @dev Base64 Encoding/Decoding Table */ string internal constant _TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; /** * @dev Converts a `bytes` to its Bytes64 `string` representation. */ function encode(bytes memory data) internal pure returns (string memory) { /** * Inspired by Brecht Devos (Brechtpd) implementation - MIT licence * https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol */ if (data.length == 0) return ""; // Loads the table into memory string memory table = _TABLE; // Encoding takes 3 bytes chunks of binary data from `bytes` data parameter // and split into 4 numbers of 6 bits. // The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up // - `data.length + 2` -> Round up // - `/ 3` -> Number of 3-bytes chunks // - `4 *` -> 4 characters for each chunk string memory result = new string(4 * ((data.length + 2) / 3)); /// @solidity memory-safe-assembly assembly { // Prepare the lookup table (skip the first "length" byte) let tablePtr := add(table, 1) // Prepare result pointer, jump over length let resultPtr := add(result, 32) // Run over the input, 3 bytes at a time for { let dataPtr := data let endPtr := add(data, mload(data)) } lt(dataPtr, endPtr) { } { // Advance 3 bytes dataPtr := add(dataPtr, 3) let input := mload(dataPtr) // To write each character, shift the 3 bytes (18 bits) chunk // 4 times in blocks of 6 bits for each character (18, 12, 6, 0) // and apply logical AND with 0x3F which is the number of // the previous character in the ASCII table prior to the Base64 Table // The result is then added to the table to get the character to write, // and finally write it in the result pointer but with a left shift // of 256 (1 byte) - 8 (1 ASCII char) = 248 bits mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F)))) resultPtr := add(resultPtr, 1) // Advance mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F)))) resultPtr := add(resultPtr, 1) // Advance mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F)))) resultPtr := add(resultPtr, 1) // Advance mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F)))) resultPtr := add(resultPtr, 1) // Advance } // When data `bytes` is not exactly 3 bytes long // it is padded with `=` characters at the end switch mod(mload(data), 3) case 1 { mstore8(sub(resultPtr, 1), 0x3d) mstore8(sub(resultPtr, 2), 0x3d) } case 2 { mstore8(sub(resultPtr, 1), 0x3d) } } return result; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv( uint256 x, uint256 y, uint256 denominator ) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv( uint256 x, uint256 y, uint256 denominator, Rounding rounding ) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10**64) { value /= 10**64; result += 64; } if (value >= 10**32) { value /= 10**32; result += 32; } if (value >= 10**16) { value /= 10**16; result += 16; } if (value >= 10**8) { value /= 10**8; result += 8; } if (value >= 10**4) { value /= 10**4; result += 4; } if (value >= 10**2) { value /= 10**2; result += 2; } if (value >= 10**1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.17; interface IChecks { struct StoredCheck { uint16[6] composites; // The tokenIds that were composited into this one uint8[5] colorBands; // The length of the used color band in percent uint8[5] gradients; // Gradient settings for each generation uint8 divisorIndex; // Easy access to next / previous divisor uint32 epoch; // Each check is revealed in an epoch uint16 seed; // A unique identifyer to enable swapping uint24 day; // The days since token was created } struct Check { StoredCheck stored; // We carry over the check from storage bool isRevealed; // Whether the check is revealed uint256 seed; // The instantiated seed for pseudo-randomisation uint8 checksCount; // How many checks this token has bool hasManyChecks; // Whether the check has many checks uint16 composite; // The parent tokenId that was composited into this one bool isRoot; // Whether it has no parents (80 checks) uint8 colorBand; // 100%, 50%, 25%, 12.5%, 6.25%, 5%, 1.25% uint8 gradient; // Linearly through the colorBand [1, 2, 3] uint8 direction; // Animation direction uint8 speed; // Animation speed } struct Epoch { uint128 randomness; // The source of randomness for tokens from this epoch uint64 revealBlock; // The block at which this epoch was / is revealed bool committed; // Whether the epoch has been instantiated bool revealed; // Whether the epoch has been revealed } struct Checks { mapping(uint256 => StoredCheck) all; // All checks uint32 minted; // The number of checks editions that have been migrated uint32 burned; // The number of tokens that have been burned uint32 day0; // Marks the start of this journey mapping(uint256 => Epoch) epochs; // All epochs uint256 epoch; // The current epoch index } event Sacrifice( uint256 indexed burnedId, uint256 indexed tokenId ); event Composite( uint256 indexed tokenId, uint256 indexed burnedId, uint8 indexed checks ); event Infinity( uint256 indexed tokenId, uint256[] indexed burnedIds ); event NewEpoch( uint256 indexed epoch, uint64 indexed revealBlock ); error NotAllowed(); error InvalidTokenCount(); error BlackCheck__InvalidCheck(); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.17; interface IChecksEdition { /// @dev Burns `tokenId`. See {ERC721-_burn}. function burn(uint256 tokenId) external; /// @dev Returns the owner of the `tokenId` token. function ownerOf(uint256 tokenId) external view returns (address owner); /// @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. function isApprovedForAll(address owner, address operator) external view returns (bool); /// @dev Returns the approved operator of a specific token. function getApproved(uint256 tokenId) external view returns (address operator); /// @dev Error when burning unapproved tokens. error TransferCallerNotOwnerNorApproved(); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/CHECKS721.sol) pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/utils/introspection/IERC165.sol"; /// @title EIP-721 Metadata Update Extension interface IERC4906 is IERC165, IERC721 { /// @dev This event emits when the metadata of a token is changed. /// Third-party platforms such as NFT marketplaces can listen to /// the event and auto-update the tokens in their apps. event MetadataUpdate(uint256 _tokenId); }
//SPDX-License-Identifier: MIT pragma solidity ^0.8.17; import "./EightyColors.sol"; import "../interfaces/IChecks.sol"; import "./Utilities.sol"; /** ///////// VV CHECKS ///////// // // // // // // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // // // // // // ///// DONT TRUST, CHECK ///// @title ChecksArt @author VisualizeValue @notice Renders the Checks visuals. */ library ChecksArt { /// @dev The path for a 20x20 px check based on a 36x36 px frame. string public constant CHECKS_PATH = 'M21.36 9.886A3.933 3.933 0 0 0 18 8c-1.423 0-2.67.755-3.36 1.887a3.935 3.935 0 0 0-4.753 4.753A3.933 3.933 0 0 0 8 18c0 1.423.755 2.669 1.886 3.36a3.935 3.935 0 0 0 4.753 4.753 3.933 3.933 0 0 0 4.863 1.59 3.953 3.953 0 0 0 1.858-1.589 3.935 3.935 0 0 0 4.753-4.754A3.933 3.933 0 0 0 28 18a3.933 3.933 0 0 0-1.887-3.36 3.934 3.934 0 0 0-1.042-3.711 3.934 3.934 0 0 0-3.71-1.043Zm-3.958 11.713 4.562-6.844c.566-.846-.751-1.724-1.316-.878l-4.026 6.043-1.371-1.368c-.717-.722-1.836.396-1.116 1.116l2.17 2.15a.788.788 0 0 0 1.097-.22Z'; /// @dev The semiperfect divisors of the 80 checks. function DIVISORS() public pure returns (uint8[8] memory) { return [ 80, 40, 20, 10, 5, 4, 1, 0 ]; } /// @dev The different color band sizes that we use for the art. function COLOR_BANDS() public pure returns (uint8[7] memory) { return [ 80, 60, 40, 20, 10, 5, 1 ]; } /// @dev The gradient increment steps. function GRADIENTS() public pure returns (uint8[7] memory) { return [ 0, 1, 2, 5, 8, 9, 10 ]; } /// @dev Load a check from storage and fill its current state settings. /// @param tokenId The id of the check to fetch. /// @param checks The DB containing all checks. function getCheck( uint256 tokenId, IChecks.Checks storage checks ) public view returns (IChecks.Check memory check) { IChecks.StoredCheck memory stored = checks.all[tokenId]; return getCheck(tokenId, stored.divisorIndex, checks); } /// @dev Load a check from storage and fill its current state settings. /// @param tokenId The id of the check to fetch. /// @param divisorIndex The divisorindex to get. /// @param checks The DB containing all checks. function getCheck( uint256 tokenId, uint8 divisorIndex, IChecks.Checks storage checks ) public view returns (IChecks.Check memory check) { IChecks.StoredCheck memory stored = checks.all[tokenId]; stored.divisorIndex = divisorIndex; // Override in case we're fetching specific state. check.stored = stored; // Set up the source of randomness + seed for this Check. uint128 randomness = checks.epochs[stored.epoch].randomness; check.seed = (uint256(keccak256(abi.encodePacked(randomness, stored.seed))) % type(uint128).max); // Helpers check.isRoot = divisorIndex == 0; check.isRevealed = randomness > 0; check.hasManyChecks = divisorIndex < 6; check.composite = !check.isRoot && divisorIndex < 7 ? stored.composites[divisorIndex - 1] : 0; // Token properties check.colorBand = colorBandIndex(check, divisorIndex); check.gradient = gradientIndex(check, divisorIndex); check.checksCount = DIVISORS()[divisorIndex]; check.speed = uint8(2**(check.seed % 3)); check.direction = uint8(check.seed % 2); } /// @dev Query the gradient of a given check at a certain check count. /// @param check The check we want to get the gradient for. /// @param divisorIndex The check divisor in question. function gradientIndex(IChecks.Check memory check, uint8 divisorIndex) public pure returns (uint8) { uint256 n = Utilities.random(check.seed, 'gradient', 100); return divisorIndex == 0 ? n < 20 ? uint8(1 + (n % 6)) : 0 : divisorIndex < 6 ? check.stored.gradients[divisorIndex - 1] : 0; } /// @dev Query the color band of a given check at a certain check count. /// @param check The check we want to get the color band for. /// @param divisorIndex The check divisor in question. function colorBandIndex(IChecks.Check memory check, uint8 divisorIndex) public pure returns (uint8) { uint256 n = Utilities.random(check.seed, 'band', 120); return divisorIndex == 0 ? ( n > 80 ? 0 : n > 40 ? 1 : n > 20 ? 2 : n > 10 ? 3 : n > 4 ? 4 : n > 1 ? 5 : 6 ) : divisorIndex < 6 ? check.stored.colorBands[divisorIndex - 1] : 6; } /// @dev Generate indexes for the color slots of check parents (up to the EightyColors.COLORS themselves). /// @param divisorIndex The current divisorIndex to query. /// @param check The current check to investigate. /// @param checks The DB containing all checks. function colorIndexes( uint8 divisorIndex, IChecks.Check memory check, IChecks.Checks storage checks ) public view returns (uint256[] memory) { uint8[8] memory divisors = DIVISORS(); uint256 checksCount = divisors[divisorIndex]; uint256 seed = check.seed; uint8 colorBand = COLOR_BANDS()[colorBandIndex(check, divisorIndex)]; uint8 gradient = GRADIENTS()[gradientIndex(check, divisorIndex)]; // If we're a composited check, we choose colors only based on // the slots available in our parents. Otherwise, // we choose based on our available spectrum. uint256 possibleColorChoices = divisorIndex > 0 ? divisors[divisorIndex - 1] * 2 : 80; // We initialize our index and select the first color uint256[] memory indexes = new uint256[](checksCount); indexes[0] = Utilities.random(seed, possibleColorChoices); // If we have more than one check, continue selecting colors if (check.hasManyChecks) { if (gradient > 0) { // If we're a gradient check, we select based on the color band looping around // the 80 possible colors for (uint256 i = 1; i < checksCount;) { indexes[i] = (indexes[0] + (i * gradient * colorBand / checksCount) % colorBand) % 80; unchecked { ++i; } } } else if (divisorIndex == 0) { // If we select initial non gradient colors, we just take random ones // available in our color band for (uint256 i = 1; i < checksCount;) { indexes[i] = (indexes[0] + Utilities.random(seed + i, colorBand)) % 80; unchecked { ++i; } } } else { // If we have parent checks, we select our colors from their set for (uint256 i = 1; i < checksCount;) { indexes[i] = Utilities.random(seed + i, possibleColorChoices); unchecked { ++i; } } } } // We resolve our color indexes through our parent tree until we reach the root checks if (divisorIndex > 0) { uint8 previousDivisor = divisorIndex - 1; // We already have our current check, but need the our parent state color indices uint256[] memory parentIndexes = colorIndexes(previousDivisor, check, checks); // We also need to fetch the colors of the check that was composited into us IChecks.Check memory composited = getCheck(check.composite, checks); uint256[] memory compositedIndexes = colorIndexes(previousDivisor, composited, checks); // Replace random indices with parent / root color indices uint8 count = divisors[previousDivisor]; // We always select the first color from our parent uint256 initialBranchIndex = indexes[0] % count; indexes[0] = indexes[0] < count ? parentIndexes[initialBranchIndex] : compositedIndexes[initialBranchIndex]; // If we don't have a gradient, we continue resolving from our parent for the remaining checks if (gradient == 0) { for (uint256 i; i < checksCount;) { uint256 branchIndex = indexes[i] % count; indexes[i] = indexes[i] < count ? parentIndexes[branchIndex] : compositedIndexes[branchIndex]; unchecked { ++i; } } // If we have a gradient we base the remaining colors off our initial selection } else { for (uint256 i = 1; i < checksCount;) { indexes[i] = (indexes[0] + (i * gradient * colorBand / checksCount) % colorBand) % 80; unchecked { ++i; } } } } return indexes; } /// @dev Fetch all colors of a given Check. /// @param check The check to get colors for. /// @param checks The DB containing all checks. function colors( IChecks.Check memory check, IChecks.Checks storage checks ) public view returns (string[] memory, uint256[] memory) { // A fully composited check has no color. if (check.stored.divisorIndex == 7) { string[] memory zeroColors = new string[](1); uint256[] memory zeroIndexes = new uint256[](1); zeroColors[0] = '000'; zeroIndexes[0] = 999; return (zeroColors, zeroIndexes); } // An unrevealed check is all gray. if (! check.isRevealed) { string[] memory preRevealColors = new string[](1); uint256[] memory preRevealIndexes = new uint256[](1); preRevealColors[0] = '424242'; preRevealIndexes[0] = 0; return (preRevealColors, preRevealIndexes); } // Fetch the indices on the original color mapping. uint256[] memory indexes = colorIndexes(check.stored.divisorIndex, check, checks); // Map over to get the colors. string[] memory checkColors = new string[](indexes.length); string[80] memory allColors = EightyColors.COLORS(); // Always set the first color. checkColors[0] = allColors[indexes[0]]; // Resolve each additional check color via their index in EightyColors.COLORS. for (uint256 i = 1; i < indexes.length; i++) { checkColors[i] = allColors[indexes[i]]; } return (checkColors, indexes); } /// @dev Get the number of checks we should display per row. /// @param checks The number of checks in the piece. function perRow(uint8 checks) public pure returns (uint8) { return checks == 80 ? 8 : checks >= 20 ? 4 : checks == 10 || checks == 4 ? 2 : 1; } /// @dev Get the X-offset for positioning checks horizontally. /// @param checks The number of checks in the piece. function rowX(uint8 checks) public pure returns (uint16) { return checks <= 1 ? 286 : checks == 5 ? 304 : checks == 10 || checks == 4 ? 268 : 196; } /// @dev Get the Y-offset for positioning checks vertically. /// @param checks The number of checks in the piece. function rowY(uint8 checks) public pure returns (uint16) { return checks > 4 ? 160 : checks == 4 ? 268 : checks > 1 ? 304 : 286; } /// @dev Get the animation SVG snipped for an individual check of a piece. /// @param data The data object containing rendering settings. /// @param offset The index position of the check in question. /// @param allColors All available colors. function fillAnimation( CheckRenderData memory data, uint256 offset, string[80] memory allColors ) public pure returns (bytes memory) { // We only pick 20 colors from our gradient to reduce execution time. uint8 count = 20; bytes memory values; // Reverse loop through our color gradient. if (data.check.direction == 0) { for (uint256 i = offset + 80; i > offset;) { values = abi.encodePacked(values, '#', allColors[i % 80], ';'); unchecked { i-=4; } } // Forward loop through our color gradient. } else { for (uint256 i = offset; i < offset + 80;) { values = abi.encodePacked(values, '#', allColors[i % 80], ';'); unchecked { i+=4; } } } // Add initial color as last one for smooth animations. values = abi.encodePacked(values, '#', allColors[offset]); // Render the SVG snipped for the animation return abi.encodePacked( '<animate ', 'attributeName="fill" values="',values,'" ', 'dur="',Utilities.uint2str(count * 2 / data.check.speed),'s" begin="animation.begin" ', 'repeatCount="indefinite" ', '/>' ); } /// @dev Generate the SVG code for all checks in a given token. /// @param data The data object containing rendering settings. function generateChecks(CheckRenderData memory data) public pure returns (bytes memory) { bytes memory checksBytes; string[80] memory allColors = EightyColors.COLORS(); uint8 checksCount = data.count; for (uint8 i; i < checksCount; i++) { // Compute row settings. data.indexInRow = i % data.perRow; data.isNewRow = data.indexInRow == 0 && i > 0; // Compute offsets. if (data.isNewRow) data.rowY += data.spaceY; if (data.isNewRow && data.indent) { if (i == 0) { data.rowX += data.spaceX / 2; } if (i % (data.perRow * 2) == 0) { data.rowX -= data.spaceX / 2; } else { data.rowX += data.spaceX / 2; } } string memory translateX = Utilities.uint2str(data.rowX + data.indexInRow * data.spaceX); string memory translateY = Utilities.uint2str(data.rowY); string memory color = data.check.isRevealed ? data.colors[i] : data.colors[0]; // Render the current check. checksBytes = abi.encodePacked(checksBytes, abi.encodePacked( '<g transform="translate(', translateX, ', ', translateY, ') scale(', data.scale, ')">', '<use href="#check" fill="#', color, '">', (data.check.isRevealed && !data.isBlack) ? fillAnimation(data, data.colorIndexes[i], allColors) : bytes(''), '</use>' '</g>' )); } return checksBytes; } /// @dev Collect relevant rendering data for easy access across functions. /// @param check Our current check loaded from storage. /// @param checks The DB containing all checks. function collectRenderData( IChecks.Check memory check, IChecks.Checks storage checks ) public view returns (CheckRenderData memory data) { // Carry through base settings. data.check = check; data.isBlack = check.stored.divisorIndex == 7; data.count = data.isBlack ? 1 : DIVISORS()[check.stored.divisorIndex]; // Compute colors and indexes. (string[] memory colors_, uint256[] memory colorIndexes_) = colors(check, checks); data.gridColor = data.isBlack ? '#F2F2F2' : '#191919'; data.canvasColor = data.isBlack ? '#FFF' : '#111'; data.colorIndexes = colorIndexes_; data.colors = colors_; // Compute positioning data. data.scale = data.count > 20 ? '1' : data.count > 1 ? '2' : '3'; data.spaceX = data.count == 80 ? 36 : 72; data.spaceY = data.count > 20 ? 36 : 72; data.perRow = perRow(data.count); data.indent = data.count == 40; data.rowX = rowX(data.count); data.rowY = rowY(data.count); } /// @dev Generate the SVG code for rows in the 8x10 Checks grid. function generateGridRow() public pure returns (bytes memory) { bytes memory row; for (uint256 i; i < 8; i++) { row = abi.encodePacked( row, '<use href="#square" x="', Utilities.uint2str(196 + i*36), '" y="160"/>' ); } return row; } /// @dev Generate the SVG code for the entire 8x10 Checks grid. function generateGrid() public pure returns (bytes memory) { bytes memory grid; for (uint256 i; i < 10; i++) { grid = abi.encodePacked( grid, '<use href="#row" y="', Utilities.uint2str(i*36), '"/>' ); } return abi.encodePacked('<g id="grid" x="196" y="160">', grid, '</g>'); } /// @dev Generate the complete SVG code for a given Check. /// @param check The check to render. /// @param checks The DB containing all checks. function generateSVG( IChecks.Check memory check, IChecks.Checks storage checks ) public view returns (bytes memory) { CheckRenderData memory data = collectRenderData(check, checks); return abi.encodePacked( '<svg ', 'viewBox="0 0 680 680" ', 'fill="none" xmlns="http://www.w3.org/2000/svg" ', 'style="width:100%;background:black;"', '>', '<defs>', '<path id="check" fill-rule="evenodd" d="', CHECKS_PATH, '"></path>', '<rect id="square" width="36" height="36" stroke="', data.gridColor, '"></rect>', '<g id="row">', generateGridRow(), '</g>' '</defs>', '<rect width="680" height="680" fill="black"/>', '<rect x="188" y="152" width="304" height="376" fill="', data.canvasColor, '"/>', generateGrid(), generateChecks(data), '<rect width="680" height="680" fill="transparent">', '<animate ', 'attributeName="width" ', 'from="680" ', 'to="0" ', 'dur="0.2s" ', 'begin="click" ', 'fill="freeze" ', 'id="animation"', '/>', '</rect>', '</svg>' ); } } /// @dev Bag holding all data relevant for rendering. struct CheckRenderData { IChecks.Check check; uint256[] colorIndexes; string[] colors; string canvasColor; string gridColor; string duration; string scale; uint32 seed; uint16 rowX; uint16 rowY; uint8 count; uint8 spaceX; uint8 spaceY; uint8 perRow; uint8 indexInRow; uint8 isIndented; bool isNewRow; bool isBlack; bool indent; }
//SPDX-License-Identifier: MIT pragma solidity ^0.8.17; import "@openzeppelin/contracts/utils/Base64.sol"; import "./ChecksArt.sol"; import "../interfaces/IChecks.sol"; import "./Utilities.sol"; /** ✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓ ✓✓✓✓✓✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓✓✓✓✓ ✓✓✓✓✓✓✓✓ ✓✓ ✓✓ ✓✓✓✓✓✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓ ✓✓✓✓✓✓✓ ✓✓ ✓✓ ✓✓✓✓✓✓ ✓✓ ✓✓✓✓✓✓✓✓✓ ✓✓✓✓ @title ChecksMetadata @author VisualizeValue @notice Renders ERC721 compatible metadata for Checks. */ library ChecksMetadata { /// @dev Render the JSON Metadata for a given Checks token. /// @param tokenId The id of the token to render. /// @param checks The DB containing all checks. function tokenURI( uint256 tokenId, IChecks.Checks storage checks ) public view returns (string memory) { IChecks.Check memory check = ChecksArt.getCheck(tokenId, checks); bytes memory svg = ChecksArt.generateSVG(check, checks); bytes memory metadata = abi.encodePacked( '{', '"name": "Checks ', Utilities.uint2str(tokenId), '",', '"description": "This artwork may or may not be notable.",', '"image": ', '"data:image/svg+xml;base64,', Base64.encode(svg), '",', '"animation_url": ', '"data:text/html;base64,', Base64.encode(generateHTML(tokenId, svg)), '",', '"attributes": [', attributes(check), ']', '}' ); return string( abi.encodePacked( "data:application/json;base64,", Base64.encode(metadata) ) ); } /// @dev Render the JSON atributes for a given Checks token. /// @param check The check to render. function attributes(IChecks.Check memory check) public pure returns (bytes memory) { bool showVisualAttributes = check.isRevealed && check.hasManyChecks; bool showAnimationAttributes = check.isRevealed && check.checksCount > 0; return abi.encodePacked( showVisualAttributes ? trait('Color Band', colorBand(ChecksArt.colorBandIndex(check, check.stored.divisorIndex)), ',') : '', showVisualAttributes ? trait('Gradient', gradients(ChecksArt.gradientIndex(check, check.stored.divisorIndex)), ',') : '', showAnimationAttributes ? trait('Speed', check.speed == 4 ? '2x' : check.speed == 2 ? '1x' : '0.5x', ',') : '', showAnimationAttributes ? trait('Shift', check.direction == 0 ? 'IR' : 'UV', ',') : '', check.isRevealed == false ? trait('Revealed', 'No', ',') : '', trait('Checks', Utilities.uint2str(check.checksCount), ','), trait('Day', Utilities.uint2str(check.stored.day), '') ); } /// @dev Get the names for different gradients. Compare ChecksArt.GRADIENTS. /// @param gradientIndex The index of the gradient. function gradients(uint8 gradientIndex) public pure returns (string memory) { return [ 'None', 'Linear', 'Double Linear', 'Reflected', 'Double Angled', 'Angled', 'Linear Z' ][gradientIndex]; } /// @dev Get the percentage values for different color bands. Compare ChecksArt.COLOR_BANDS. /// @param bandIndex The index of the color band. function colorBand(uint8 bandIndex) public pure returns (string memory) { return [ 'Eighty', 'Sixty', 'Forty', 'Twenty', 'Ten', 'Five', 'One' ][bandIndex]; } /// @dev Generate the SVG snipped for a single attribute. /// @param traitType The `trait_type` for this trait. /// @param traitValue The `value` for this trait. /// @param append Helper to append a comma. function trait( string memory traitType, string memory traitValue, string memory append ) public pure returns (string memory) { return string(abi.encodePacked( '{', '"trait_type": "', traitType, '",' '"value": "', traitValue, '"' '}', append )); } /// @dev Generate the HTML for the animation_url in the metadata. /// @param tokenId The id of the token to generate the embed for. /// @param svg The rendered SVG code to embed in the HTML. function generateHTML(uint256 tokenId, bytes memory svg) public pure returns (bytes memory) { return abi.encodePacked( '<!DOCTYPE html>', '<html lang="en">', '<head>', '<meta charset="UTF-8">', '<meta http-equiv="X-UA-Compatible" content="IE=edge">', '<meta name="viewport" content="width=device-width, initial-scale=1.0">', '<title>Check #', Utilities.uint2str(tokenId), '</title>', '<style>', 'html,', 'body {', 'margin: 0;', 'background: #EFEFEF;', 'overflow: hidden;', '}', 'svg {', 'max-width: 100vw;', 'max-height: 100vh;', '}', '</style>', '</head>', '<body>', svg, '</body>', '</html>' ); } }
//SPDX-License-Identifier: MIT pragma solidity ^0.8.17; /** ///////////////////////////////// // // // // // // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ // // // // // // // ///////////////////////////////// @title EightyColors @author VisualizeValue @notice The eighty colors of Checks. */ library EightyColors { /// @dev Theese are sorted in a gradient. function COLORS() public pure returns (string[80] memory) { return [ 'E84AA9', 'F2399D', 'DB2F96', 'E73E85', 'FF7F8E', 'FA5B67', 'E8424E', 'D5332F', 'C23532', 'F2281C', 'D41515', '9D262F', 'DE3237', 'DA3321', 'EA3A2D', 'EB4429', 'EC7368', 'FF8079', 'FF9193', 'EA5B33', 'D05C35', 'ED7C30', 'EF9933', 'EF8C37', 'F18930', 'F09837', 'F9A45C', 'F2A43A', 'F2A840', 'F2A93C', 'FFB340', 'F2B341', 'FAD064', 'F7CA57', 'F6CB45', 'FFAB00', 'F4C44A', 'FCDE5B', 'F9DA4D', 'F9DA4A', 'FAE272', 'F9DB49', 'FAE663', 'FBEA5B', 'A7CA45', 'B5F13B', '94E337', '63C23C', '86E48E', '77E39F', '5FCD8C', '83F1AE', '9DEFBF', '2E9D9A', '3EB8A1', '5FC9BF', '77D3DE', '6AD1DE', '5ABAD3', '4291A8', '33758D', '45B2D3', '81D1EC', 'A7DDF9', '9AD9FB', 'A4C8EE', '60B1F4', '2480BD', '4576D0', '3263D0', '2E4985', '25438C', '525EAA', '3D43B3', '322F92', '4A2387', '371471', '3B088C', '6C31D7', '9741DA' ]; } }
//SPDX-License-Identifier: MIT pragma solidity ^0.8.17; library Utilities { /// @dev Zero-index based pseudorandom number based on one input and max bound function random(uint256 input, uint256 _max) internal pure returns (uint256) { return (uint256(keccak256(abi.encodePacked(input))) % _max); } /// @dev Zero-index based salted pseudorandom number based on two inputs and max bound function random(uint256 input, string memory salt, uint256 _max) internal pure returns (uint256) { return (uint256(keccak256(abi.encodePacked(input, salt))) % _max); } /// @dev Convert an integer to a string function uint2str(uint256 _i) internal pure returns (string memory _uintAsString) { if (_i == 0) { return "0"; } uint256 j = _i; uint256 len; while (j != 0) { ++len; j /= 10; } bytes memory bstr = new bytes(len); uint256 k = len; while (_i != 0) { k = k - 1; uint8 temp = (48 + uint8(_i - (_i / 10) * 10)); bytes1 b1 = bytes1(temp); bstr[k] = b1; _i /= 10; } return string(bstr); } /// @dev Get the smallest non zero number function minGt0(uint8 one, uint8 two) internal pure returns (uint8) { return one > two ? two > 0 ? two : one : one; } /// @dev Get the smaller number function min(uint8 one, uint8 two) internal pure returns (uint8) { return one < two ? one : two; } /// @dev Get the larger number function max(uint8 one, uint8 two) internal pure returns (uint8) { return one > two ? one : two; } /// @dev Get the average between two numbers function avg(uint8 one, uint8 two) internal pure returns (uint8 result) { unchecked { result = (one >> 1) + (two >> 1) + (one & two & 1); } } /// @dev Get the days since another date (input is seconds) function day(uint256 from, uint256 to) internal pure returns (uint24) { return uint24((to - from) / 24 hours + 1); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/CHECKS721.sol) pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol"; import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol"; import "@openzeppelin/contracts/utils/Address.sol"; import "@openzeppelin/contracts/utils/Context.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; import "../interfaces/IERC4906.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 CHECKS721 is Context, ERC165, IERC721, IERC721Metadata, IERC4906 { error ERC721__InvalidApproval(); error ERC721__InvalidOwner(); error ERC721__InvalidToken(); error ERC721__NotAllowed(); error ERC721__TokenExists(); error ERC721__TransferToNonReceiver(); error ERC721__TransferToZero(); 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() { _name = "Checks"; _symbol = "CHECKS"; } /** * @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) { if (owner == address(0)) { revert ERC721__InvalidOwner(); } return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _ownerOf(tokenId); if (owner == address(0)) { revert ERC721__InvalidToken(); } 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) { _requireMinted(tokenId); return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = CHECKS721.ownerOf(tokenId); if ( to == owner || ( _msgSender() != owner && !isApprovedForAll(owner, _msgSender()) ) ) { revert ERC721__InvalidApproval(); } _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { _requireMinted(tokenId); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { if (!_isApprovedOrOwner(_msgSender(), tokenId)) { revert ERC721__NotAllowed(); } _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 { if (!_isApprovedOrOwner(_msgSender(), tokenId)) { revert ERC721__NotAllowed(); } _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); if (!_checkOnERC721Received(from, to, tokenId, data)) { revert ERC721__TransferToNonReceiver(); } } /** * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist */ function _ownerOf(uint256 tokenId) internal view virtual returns (address) { return _owners[tokenId]; } /** * @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 _ownerOf(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) { address owner = CHECKS721.ownerOf(tokenId); return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint( address to, uint256 tokenId, bytes memory data ) internal virtual { _mint(to, tokenId); if (!_checkOnERC721Received(address(0), to, tokenId, data)) { revert ERC721__TransferToNonReceiver(); } } /** * @dev Safely mints `tokenId` and transfers it to `to` after an inital transfer to `via`. * * 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 _safeMintVia(address to, address via, uint256 tokenId) internal virtual { _safeMintVia(to, via, 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 _safeMintVia( address to, address via, uint256 tokenId, bytes memory data ) internal virtual { _mintVia(to, via, tokenId); if (!_checkOnERC721Received(address(0), to, tokenId, data)) { revert ERC721__TransferToNonReceiver(); } } /** * @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 { _mintState(to, tokenId); emit Transfer(address(0), to, tokenId); _afterTokenTransfer(address(0), to, tokenId, 1); } /** * @dev Mints `tokenId` and transfers it to `to` after a transfer to `via` * * 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 _mintVia(address to, address via, uint256 tokenId) internal virtual { _mintState(to, tokenId); emit Transfer(address(0), via, tokenId); emit Transfer(via, to, tokenId); _afterTokenTransfer(address(0), to, tokenId, 1); } /** * @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. */ function _mintState(address to, uint256 tokenId) internal virtual { if (to == address(0)) { revert ERC721__TransferToZero(); } if (_exists(tokenId)) { revert ERC721__TokenExists(); } _beforeTokenTransfer(address(0), to, tokenId, 1); // Check that tokenId was not minted by `_beforeTokenTransfer` hook if (_exists(tokenId)) { revert ERC721__TokenExists(); } unchecked { // Will not overflow unless all 2**256 token ids are minted to the same owner. // Given that tokens are minted one by one, it is impossible in practice that // this ever happens. Might change if we allow batch minting. // The ERC fails to describe this case. _balances[to] += 1; } _owners[tokenId] = to; } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * This is an internal function that does not check if the sender is authorized to operate on the token. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = CHECKS721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId, 1); // Update ownership in case tokenId was transferred by `_beforeTokenTransfer` hook owner = CHECKS721.ownerOf(tokenId); // Clear approvals delete _tokenApprovals[tokenId]; unchecked { // Cannot overflow, as that would require more tokens to be burned/transferred // out than the owner initially received through minting and transferring in. _balances[owner] -= 1; } delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); _afterTokenTransfer(owner, address(0), tokenId, 1); } /** * @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 { if (CHECKS721.ownerOf(tokenId) != from) { revert ERC721__InvalidOwner(); } if (to == address(0)) { revert ERC721__TransferToZero(); } _beforeTokenTransfer(from, to, tokenId, 1); // Check that tokenId was not transferred by `_beforeTokenTransfer` hook if (CHECKS721.ownerOf(tokenId) != from) { revert ERC721__InvalidOwner(); } // Clear approvals from the previous owner delete _tokenApprovals[tokenId]; unchecked { // `_balances[from]` cannot overflow for the same reason as described in `_burn`: // `from`'s balance is the number of token held, which is at least one before the current // transfer. // `_balances[to]` could overflow in the conditions described in `_mint`. That would require // all 2**256 token ids to be minted, which in practice is impossible. _balances[from] -= 1; _balances[to] += 1; } _owners[tokenId] = to; emit Transfer(from, to, tokenId); _afterTokenTransfer(from, to, tokenId, 1); } /** * @dev Approve `to` to operate on `tokenId` * * Emits an {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(CHECKS721.ownerOf(tokenId), to, tokenId); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits an {ApprovalForAll} event. */ function _setApprovalForAll( address owner, address operator, bool approved ) internal virtual { if (owner == operator) { revert ERC721__InvalidApproval(); } _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Reverts if the `tokenId` has not been minted yet. */ function _requireMinted(uint256 tokenId) internal view virtual { if (!_exists(tokenId)) { revert ERC721__InvalidToken(); } } /** * @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__TransferToNonReceiver(); } else { /// @solidity memory-safe-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. If {ERC721Consecutive} is * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s tokens will be transferred to `to`. * - When `from` is zero, the tokens will be minted for `to`. * - When `to` is zero, ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * - `batchSize` is non-zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256, /* firstTokenId */ uint256 batchSize ) internal virtual { if (batchSize > 1) { if (from != address(0)) { _balances[from] -= batchSize; } if (to != address(0)) { _balances[to] += batchSize; } } } /** * @dev Hook that is called after any token transfer. This includes minting and burning. If {ERC721Consecutive} is * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s tokens were transferred to `to`. * - When `from` is zero, the tokens were minted for `to`. * - When `to` is zero, ``from``'s tokens were burned. * - `from` and `to` are never both zero. * - `batchSize` is non-zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 firstTokenId, uint256 batchSize ) internal virtual {} }
{ "optimizer": { "enabled": false, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": { "contracts/libraries/ChecksArt.sol": { "ChecksArt": "0x3bcbf1480879bff8435b1534c70b4a5182fb2466" }, "contracts/libraries/ChecksMetadata.sol": { "ChecksMetadata": "0x4924c4f2b2514557488a78df410369094b719dac" } } }
Contract Security Audit
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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"BlackCheck__InvalidCheck","type":"error"},{"inputs":[],"name":"ERC721__InvalidApproval","type":"error"},{"inputs":[],"name":"ERC721__InvalidOwner","type":"error"},{"inputs":[],"name":"ERC721__InvalidToken","type":"error"},{"inputs":[],"name":"ERC721__NotAllowed","type":"error"},{"inputs":[],"name":"ERC721__TokenExists","type":"error"},{"inputs":[],"name":"ERC721__TransferToNonReceiver","type":"error"},{"inputs":[],"name":"ERC721__TransferToZero","type":"error"},{"inputs":[],"name":"InvalidTokenCount","type":"error"},{"inputs":[],"name":"NotAllowed","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"burnedId","type":"uint256"},{"indexed":true,"internalType":"uint8","name":"checks","type":"uint8"}],"name":"Composite","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":true,"internalType":"uint256[]","name":"burnedIds","type":"uint256[]"}],"name":"Infinity","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"MetadataUpdate","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"epoch","type":"uint256"},{"indexed":true,"internalType":"uint64","name":"revealBlock","type":"uint64"}],"name":"NewEpoch","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"burnedId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Sacrifice","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"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":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"colors","outputs":[{"internalType":"string[]","name":"","type":"string[]"},{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"burnId","type":"uint256"},{"internalType":"bool","name":"swap","type":"bool"}],"name":"composite","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"},{"internalType":"uint256[]","name":"burnIds","type":"uint256[]"}],"name":"compositeMany","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"editionChecks","outputs":[{"internalType":"contract IChecksEdition","name":"","type":"address"}],"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":"getCheck","outputs":[{"components":[{"components":[{"internalType":"uint16[6]","name":"composites","type":"uint16[6]"},{"internalType":"uint8[5]","name":"colorBands","type":"uint8[5]"},{"internalType":"uint8[5]","name":"gradients","type":"uint8[5]"},{"internalType":"uint8","name":"divisorIndex","type":"uint8"},{"internalType":"uint32","name":"epoch","type":"uint32"},{"internalType":"uint16","name":"seed","type":"uint16"},{"internalType":"uint24","name":"day","type":"uint24"}],"internalType":"struct IChecks.StoredCheck","name":"stored","type":"tuple"},{"internalType":"bool","name":"isRevealed","type":"bool"},{"internalType":"uint256","name":"seed","type":"uint256"},{"internalType":"uint8","name":"checksCount","type":"uint8"},{"internalType":"bool","name":"hasManyChecks","type":"bool"},{"internalType":"uint16","name":"composite","type":"uint16"},{"internalType":"bool","name":"isRoot","type":"bool"},{"internalType":"uint8","name":"colorBand","type":"uint8"},{"internalType":"uint8","name":"gradient","type":"uint8"},{"internalType":"uint8","name":"direction","type":"uint8"},{"internalType":"uint8","name":"speed","type":"uint8"}],"internalType":"struct IChecks.Check","name":"check","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getEpoch","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getEpochData","outputs":[{"components":[{"internalType":"uint128","name":"randomness","type":"uint128"},{"internalType":"uint64","name":"revealBlock","type":"uint64"},{"internalType":"bool","name":"committed","type":"bool"},{"internalType":"bool","name":"revealed","type":"bool"}],"internalType":"struct IChecks.Epoch","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"burnId","type":"uint256"}],"name":"inItForTheArt","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"},{"internalType":"uint256[]","name":"burnIds","type":"uint256[]"}],"name":"inItForTheArts","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"}],"name":"infinity","outputs":[],"stateMutability":"nonpayable","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":"uint256[]","name":"tokenIds","type":"uint256[]"},{"internalType":"address","name":"recipient","type":"address"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"resolveEpochIfNecessary","outputs":[],"stateMutability":"nonpayable","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":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"burnId","type":"uint256"}],"name":"simulateComposite","outputs":[{"components":[{"components":[{"internalType":"uint16[6]","name":"composites","type":"uint16[6]"},{"internalType":"uint8[5]","name":"colorBands","type":"uint8[5]"},{"internalType":"uint8[5]","name":"gradients","type":"uint8[5]"},{"internalType":"uint8","name":"divisorIndex","type":"uint8"},{"internalType":"uint32","name":"epoch","type":"uint32"},{"internalType":"uint16","name":"seed","type":"uint16"},{"internalType":"uint24","name":"day","type":"uint24"}],"internalType":"struct IChecks.StoredCheck","name":"stored","type":"tuple"},{"internalType":"bool","name":"isRevealed","type":"bool"},{"internalType":"uint256","name":"seed","type":"uint256"},{"internalType":"uint8","name":"checksCount","type":"uint8"},{"internalType":"bool","name":"hasManyChecks","type":"bool"},{"internalType":"uint16","name":"composite","type":"uint16"},{"internalType":"bool","name":"isRoot","type":"bool"},{"internalType":"uint8","name":"colorBand","type":"uint8"},{"internalType":"uint8","name":"gradient","type":"uint8"},{"internalType":"uint8","name":"direction","type":"uint8"},{"internalType":"uint8","name":"speed","type":"uint8"}],"internalType":"struct IChecks.Check","name":"check","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"burnId","type":"uint256"}],"name":"simulateCompositeSVG","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"svg","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","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":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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A token is a representation of an on-chain or off-chain asset. The token page shows information such as price, total supply, holders, transfers and social links. Learn more about this page in our Knowledge Base.