Contract Name:
Kinochromes
Contract Source Code:
File 1 of 1 : Kinochromes
// File: contracts/Base64.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.9;
library Base64 {
bytes internal constant TABLE =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/// @notice Encodes some bytes to the base64 representation
function encode(bytes memory data) internal pure returns (string memory) {
uint256 len = data.length;
if (len == 0) return "";
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((len + 2) / 3);
// Add some extra buffer at the end
bytes memory result = new bytes(encodedLen + 32);
bytes memory table = TABLE;
assembly {
let tablePtr := add(table, 1)
let resultPtr := add(result, 32)
for {
let i := 0
} lt(i, len) {
} {
i := add(i, 3)
let input := and(mload(add(data, i)), 0xffffff)
let out := mload(add(tablePtr, and(shr(18, input), 0x3F)))
out := shl(8, out)
out := add(
out,
and(mload(add(tablePtr, and(shr(12, input), 0x3F))), 0xFF)
)
out := shl(8, out)
out := add(
out,
and(mload(add(tablePtr, and(shr(6, input), 0x3F))), 0xFF)
)
out := shl(8, out)
out := add(
out,
and(mload(add(tablePtr, and(input, 0x3F))), 0xFF)
)
out := shl(224, out)
mstore(resultPtr, out)
resultPtr := add(resultPtr, 4)
}
switch mod(len, 3)
case 1 {
mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
}
case 2 {
mstore(sub(resultPtr, 1), shl(248, 0x3d))
}
mstore(result, encodedLen)
}
return string(result);
}
}
// File: @openzeppelin/contracts/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;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/security/ReentrancyGuard.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File: @openzeppelin/contracts/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);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/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 `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @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;
}
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: contracts/Kinochromes.sol
pragma solidity ^0.8.9;
// _ ___ _
// | | / (_) | |
// | |/ / _ _ __ ___ ___| |__ _ __ ___ _ __ ___ ___ ___
// | \| | '_ \ / _ \ / __| '_ \| '__/ _ \| '_ ` _ \ / _ \/ __|
// | |\ \ | | | | (_) | (__| | | | | | (_) | | | | | | __/\__ \
// \_| \_/_|_| |_|\___/ \___|_| |_|_| \___/|_| |_| |_|\___||___/
// by junkpunkie
contract Kinochromes is ERC721, ReentrancyGuard, Ownable {
mapping(bytes10 => bool) private hashToMinted;
mapping(uint => bytes10) private sToDNA;
mapping(uint => bytes10) private tokenIdToDNA;
mapping (address => bool) private addressToWhitelist;
mapping (address => bool) private whitelistAddrToMinted;
bool private paused = true;
bool private whitelistPaused = true;
uint private randNonce = 0;
uint private totalMinted = 0;
constructor() ERC721("Kinochromes", "[k]") {
bytes10 dnaOne = bytes10(abi.encodePacked(bytes1(0xFF),bytes1(0xFF),bytes1(0xFF),bytes1(0),bytes1(0),bytes1(0),bytes1(0),bytes1(0),bytes1(0),bytes1(0)));
bytes10 dnaTwo = bytes10(abi.encodePacked(bytes1(0xFF),bytes1(0xFF),bytes1(0xFF),bytes1(0),bytes1(0),bytes1(0x09),bytes1(0),bytes1(0),bytes1(0),bytes1(0)));
bytes5 dnaOneMinusColor = getDnaMinusColor(dnaOne);
bytes5 dnaTwoMinusColor = getDnaMinusColor(dnaTwo);
sToDNA[0x32] = dnaOne;
tokenIdToDNA[0x32] = getDnaMinusColor(dnaOne);
hashToMinted[dnaOneMinusColor] = true;
sToDNA[0x1FF] = dnaTwo;
tokenIdToDNA[0x1FF] = getDnaMinusColor(dnaTwo);
hashToMinted[dnaTwoMinusColor] = true;
}
// MINTING RELATED FUNCTIONS
// Pause or unpause minting
function setPaused(bool _paused) public nonReentrant onlyOwner {
paused = _paused;
}
function addToWhitelist(address[] memory users) public onlyOwner nonReentrant {
for (uint i = 0; i < users.length; i++) {
addressToWhitelist[users[i]] = true;
whitelistAddrToMinted[users[i]] = false;
}
}
// Whitelisted addresses can claim 1 until public minting opens
function whitelistClaim() public nonReentrant {
require (addressToWhitelist[msg.sender], "You are not on the whitelist");
require (!whitelistAddrToMinted[msg.sender], "You have already claimed with this address");
uint index = totalSupply();
require(index >= 50 && index < 512, "All have been minted");
_internalMint(index);
whitelistAddrToMinted[msg.sender] = true;
}
// Owner keeps the first 50
function ownerClaim() public nonReentrant onlyOwner {
uint index = totalSupply();
require(index >= 0 && index + 9 < 50, "Choose an unclaimed index between 0 and 51, inclusive");
for (uint i = index; i < index + 10; i++) {
_internalMint(i);
}
}
// Claim for public mint
function claim() public nonReentrant {
require (!paused, "Minting is paused");
uint index = totalSupply();
require(index >= 50 && index < 512, "All have been minted");
_internalMint(index);
}
function _internalMint(uint256 tokenId) private {
tokenIdToDNA[tokenId] = generateHash(tokenId);
_safeMint(_msgSender(), tokenId);
totalMinted++;
}
function generateHash(uint256 tokenId) internal returns (bytes10) {
// bytes10 scheme is r/g/b/background/filter/pattern/transform/shape/anim1/anim2
// like this: 0xd0714c04020901020706
// where d0 = red, 71 = green, 4c = blue, 04 = background, 02 = filter, etc
bytes10 dna;
if (tokenId == 0x32 || tokenId == 0x1FF) {
return sToDNA[tokenId];
} else {
dna = bytes10(
abi.encodePacked(
genRandomNum(tokenId, 255), // red index 0
genRandomNum(tokenId, 255), // green index 1
genRandomNum(tokenId, 255), // blue index 2
genRandomNum(tokenId, 4), // background index 3
genRandomNum(tokenId, 5), // filter index 4
genRandomNum(tokenId, 9), // pattern index 5
genRandomNum(tokenId, 5), // transform index 6
genRandomNum(tokenId, 2), // shape index 7
genRandomNum(tokenId, 8), // anim1 duration index 8
genRandomNum(tokenId, 8) // anim2 duration index 9
)
);
}
// Colors don't matter to the uniqueness of each token, but the rest
// of the attributes do matter.
bytes5 dnaMinusColor = getDnaMinusColor(dna);
// No dupes
if (hashToMinted[dnaMinusColor]) {
randNonce++;
return generateHash(tokenId);
}
hashToMinted[dnaMinusColor] = true;
return dna;
}
function getDnaMinusColor(bytes10 dna) private pure returns (bytes5) {
return bytes5(
abi.encodePacked(
dna[3], dna[4], dna[5], dna[6], dna[7], dna[8], dna[9]
)
);
}
function totalSupply() public view returns (uint) {
return totalMinted;
}
// ART FUNCTIONS
// The main SVG generator function
function generateSvg(uint256 tokenId) internal view returns (string memory) {
return string(abi.encodePacked(
'<svg width="256" height="256" version="1.1" xmlns="http://www.w3.org/2000/svg" class="s1" style="background:', buildBackground(tokenId), ';">',
generateStyle(tokenId),
'<defs>', buildShape(tokenId), '</defs>',
'<g id="g" style="',tokenId % 3 == 0 ? 'transform:scale(0.7) rotate(45deg);transform-origin:50% 50%;' : '','">',
makeArt(tokenId),
'</g></svg>'
));
}
// Creates the <style> tag
function generateStyle(uint256 tokenId) internal view returns (string memory) {
string[2] memory bgColors = invertColors(tokenId);
return string(abi.encodePacked(
'<style>.s1{--a:rgb(', bgColors[0],
');--b:rgb(', bgColors[1], ');transition: all 1000ms ease;}.s1:hover {filter:',tokenId == 0x32 ? 'sepia(1)' : (tokenId == 0x1FF ? 'contrast(5)' : (tokenId % 2 == 0 ? 'invert(1)' : 'hue-rotate(-270deg)')),';}.u{animation:',toString(buildAnimationDuration(tokenId, 8)) ,'ms infinite alternate a,',toString(buildAnimationDuration(tokenId, 9)),'ms infinite alternate b;transform-origin:50% 50%;}',
buildAnimation(tokenId),
'@keyframes b{from{opacity: 1;}to {opacity: 0.5;}}',
'</style>'
));
}
// This is the main shape and pattern plotting function
function makeArt(uint256 tokenId) internal view returns (string memory) {
string memory o;
bytes10 DNA = tokenIdToDNA[tokenId];
uint256 seed = getDNASeed(DNA, tokenId);
uint256 v = 0;
int a = 0;
int b = 0;
// The following loop and algorithm is taken and slightly tweaked from Autoglyphs, created by Matt Hall & John Watkinson of Larva Labs.
// The credit for this project and for onchain generative art goes to them.
// Read the Autoglyphs contract here: https://etherscan.io/address/0xd4e4078ca3495de5b1d4db434bebc5a986197782#code
if (uint8(DNA[5]) > 7) {
for (uint8 y = 0; y < 8; y++) {
a = (2 * (int8(y) - 4) + 1);
if (seed % 3 == 1) {
a = -a;
} else if (seed % 3 == 2) {
a = abs(a);
}
a = a * int(seed);
for (uint8 x = 0; x < 8; x++) {
b = (2 * (int8(x) - 4) + 1);
if (seed % 2 == 1) {
b = abs(b);
}
b = b * int(seed);
v = uint(a * b / int(0x100000000)) % ((seed % 25) + 5);
string memory dString = v > 12 ? string(abi.encodePacked('-', toString(v * 1000))) : toString(v * 1000);
o = string(abi.encodePacked(
o,
createShape(DNA, x, y, dString)
));
}
}
// Custom Patterns
} else {
for (uint8 y = 0; y < 8; y++) {
for (uint8 x = 0; x < 8; x++) {
v = drawCustomPattern(DNA, x, y, v);
o = string(abi.encodePacked(
o,
createShape(DNA, x, y, toString(v))
));
}
}
}
return o;
}
// This giant function contains the logic to apply animation delays
// based on the given pattern for a tokenId
function drawCustomPattern(bytes10 DNA, uint8 x, uint8 y, uint delay) pure internal returns (uint) {
uint _delay = delay;
if(DNA[5] == 0x00) {
// simple
_delay += 100;
} else if (DNA[5] == 0x01) {
// staircase
_delay += 100;
_delay = _delay > 800 ? 0 : _delay;
} else if (DNA[5] == 0x02) {
// runner
if (_delay == 0) {
_delay = 1000;
}
if (y % 2 == 0) {
_delay = x % 2 == 0 ? _delay -= 1000 : _delay;
} else {
_delay = x % 2 == 0 ? _delay : _delay -= 1000;
}
_delay += 1000;
} else if (DNA[5] == 0x03) {
// cross + corners
if ((x == 0 && y == 0) || (x == 0 && y == 7) || (x == 7 && y == 0) || (x == 7 && y == 7)) {
_delay = 6500;
} else if (x == 3 || x == 4 || y == 3 || y == 4) {
_delay = 0;
} else {
_delay = 4000;
}
} else if (DNA[5] == 0x04) {
// spiral
if (x == 0) {
_delay = 3500 + 500 * y;
} else if (y == 0) {
_delay = 3500 - 500 * x;
} else if (y == 1) {
if (x > 0 && x < 7) {
_delay = 17000 - 500 * x;
} else {
_delay = 13500;
}
} else if (y == 2) {
if (x == 1) {
_delay = 17000;
} else if (x == 7) {
_delay = 13000;
} else {
_delay = 26000 - 500 * x;
}
} else if (y == 3) {
if (x == 1) {
_delay = 17500;
} else if (x == 2) {
_delay = 26000;
} else if (x == 6) {
_delay = 23000;
} else if (x == 7) {
_delay = 12500;
} else {
_delay = 32000 - 500 * x;
}
} else if (y == 4) {
if (x == 1) {
_delay = 18000;
} else if (x == 2) {
_delay = 26500;
} else if (x == 5) {
_delay = 29000;
} else if (x == 6) {
_delay = 22500;
} else if (x == 7) {
_delay = 12000;
} else {
_delay = 29500 + 500 * x;
}
} else if (y == 5) {
if (x == 1) {
_delay = 18500;
} else if (x > 1 && x < 6) {
_delay = 26000 + 500 * x;
} else if (x == 6) {
_delay = 22000;
} else {
_delay = 11500;
}
} else if (y == 6) {
if (x != 7) {
_delay = 18500 + 500 * x;
} else {
_delay = 11000;
}
} else if (y == 7) {
_delay = 7000 + 500 * x;
}
} else if (DNA[5] == 0x05) {
// X pattern
if ((x == 0 && y == 0) || (x == 7 && y == 7) || (x == 0 && y == 7) || (x == 7 && y == 0)) {
_delay = 1000;
} else if ((x == 1 && y == 1) || (x == 6 && y == 6) || (x == 1 && y == 6) || (x == 6 && y == 1)) {
_delay = 2000;
} else if ((x == 2 && y == 2) || (x == 5 && y == 5) || (x == 2 && y == 5) || (x == 5 && y == 2)) {
_delay = 3000;
} else if ((x == 3 && y == 3) || (x == 4 && y == 4) || (x == 3 && y == 4) || (x == 4 && y == 3)) {
_delay = 4000;
} else {
_delay = 0;
}
} else if (DNA[5] == 0x06) {
// 10Print
_delay = tenPrint(DNA, x, y);
} else {
// Squares in Squares
if (
(x == 0 && y == 0) || (x == 7 && y == 7) || (x == 0 && y == 7) || (x == 7 && y == 0)
|| (x == 2 && y == 2) || (x == 5 && y == 5) || (x == 2 && y == 5) || (x == 5 && y == 2)
|| ((y == 2 || y == 5) && (x > 2 && x < 6))
|| (y > 2 && y < 5) && (x == 2 || x == 5)) {
_delay = 1000;
} else if (y == 0 || y == 7 || x == 0 || x == 7) {
_delay = 0;
} else {
_delay = 2000;
}
}
return _delay;
}
// A custom pattern based on the 10Print algorithm.
// See: https://10print.org/
function tenPrint(bytes10 DNA, uint8 x, uint8 y) internal pure returns (uint) {
uint rand = (uint(uint(uint8(DNA[x])) + uint(x) + uint(y)) % (uint(y) * 3 + 35)) % 3;
if (rand == 0) {
return 0;
}
if (rand == 1) {
return 7000;
}
return 15000;
}
// Changes a given color by subtracting up to 98 from its RGB value, and shifts the RGB position
// so as to create a nice gradient and to not clash with the background color
function changeColor(bytes10 _rgb, uint position, uint8 x, uint8 y) internal pure returns (bytes1) {
return subtractBitwise(getColor(_rgb, position > 1 ? 0 : position + 1), bytes1(uint8(x ** 2) + uint8(y ** 2)));
}
// Returns R, G, or B
function getColor(bytes10 _rgb, uint position) internal pure returns (bytes1) {
return _rgb[position];
}
// Creates a shape based on the x and y coordinates, and the animation delay
function createShape(bytes10 DNA, uint8 x, uint8 y, string memory delay) pure internal returns (string memory) {
return string(
abi.encodePacked(
'<use class="u" href="#r" x="', toString(uint8(x) * 32),
'" y="', toString(uint8(y) * 32), '" fill="rgb(',
toString(uint8(changeColor(DNA, 0, x, y))), ',',
toString(uint8(changeColor(DNA, 1, x, y))), ',',
toString(uint8(changeColor(DNA, 2, x, y))),
')" style="animation-delay:', delay, 'ms;" />'
)
);
}
// Chooses either Square or Circle shape
function buildShape(uint256 tokenId) internal view returns (string memory) {
string[2] memory shapes = [
'<rect id="r" height="32" width="32"></rect>',
'<circle id="r" cx="16" cy="16" height="32" width="32" r="8"></circle>'
];
return shapes[getAttributeAtPos(tokenId, 7)];
}
// TOKENURI AND ATTRIBUTE FUNCTIONS
function tokenURI(uint256 tokenId) public view override returns (string memory) {
require(_exists(tokenId),"ERC721Metadata: URI query for nonexistent token");
return string(abi.encodePacked(
"data:application/json;base64,",
Base64.encode(
bytes(
string(
abi.encodePacked(
'{"name": "', (tokenId == 0x1FF || tokenId == 0x32) ? 'Albinochrome #' : 'Kinochrome #',
toString(tokenId),
getAttributes(tokenId),
// These two traits are called outside of getAttributes because of Stack Too Deep errors
'"},{"trait_type": "Animation 1 Duration","value": "',
getAttributeTitleValues(tokenId, 8),
'ms"},{"trait_type": "Animation 2 Duration","value": "',
getAttributeTitleValues(tokenId, 9), 'ms"}]'
',"image": "data:image/svg+xml;base64,',
Base64.encode(
bytes(generateSvg(tokenId))
),
'"}'
)
)
)
)
));
}
// Creates the "attributes" array for tokenURI
function getAttributes(uint256 tokenId) view internal returns (string memory) {
return string(
abi.encodePacked(
'", "attributes": [',(tokenId == 0x1FF || tokenId == 0x32) ? '{"trait_type": "Special","value": "Albino"},' : '',
'{"trait_type": "Background","value": "',
getAttributeTitleValues(tokenId, 3),
'"},{"trait_type": "Filter","value": "',
getAttributeTitleValues(tokenId, 4),
'"},{"trait_type": "Pattern","value": "',
getAttributeTitleValues(tokenId, 5),
'"},{"trait_type": "Transform","value": "',
getAttributeTitleValues(tokenId, 6),
'"},{"trait_type": "Shape","value": "',
getAttributeTitleValues(tokenId, 7)
)
);
}
// Returns the "value" for each trait_type
function getAttributeTitleValues(uint256 tokenId, uint8 pos) view internal returns (string memory) {
if (pos == 3) {
return [
'Solid',
'Radial Gradient',
'Linear Gradient',
'Conic Gradient'
][getAttributeAtPos(tokenId, 3)];
}
if (pos == 4) {
return [
'Hue Rotate',
'Reverse Hue Rotate',
'Saturate/Invert',
'Sepia',
'Sepia/Invert'
][getAttributeAtPos(tokenId, 4)];
}
if (pos == 5) {
uint8 index = getAttributeAtPos(tokenId, 5);
return index > 7 ? 'Autoglyph' : [
'Simple',
'Staircase',
'Runner',
'Cross Corners',
'Spiral',
'X',
'10 Print',
'Squares in Squares'
][getAttributeAtPos(tokenId, 5)];
}
if (pos == 6) {
return [
'None',
'Shrink',
'Grow',
'Rotate',
'Slideways'
// 'Slideways (Large)'
][getAttributeAtPos(tokenId, 6)];
}
if (pos == 7) {
return [
'Square',
'Circle'
][getAttributeAtPos(tokenId, 7)];
}
return [
'1500',
'2700',
'5100',
'11000',
'15500',
'25000',
'32000',
'45000'
][getAttributeAtPos(tokenId, pos == 8 ? 8 : 9)];
}
// Returns animation duration in ms
function buildAnimationDuration(uint256 tokenId, uint8 pos) internal view returns (uint16) {
uint16[8] memory durs = [
1500,
2700,
5100,
11000,
15500,
25000,
32000,
45000
];
return durs[getAttributeAtPos(tokenId, pos)];
}
// Returns background style for main <svg>
function buildBackground(uint256 tokenId) internal view returns (string memory) {
string[4] memory backgrounds = [
'var(--a)',
'radial-gradient(var(--a), var(--b))',
'linear-gradient(var(--a), var(--b))',
'conic-gradient(var(--a), var(--b))'
];
return backgrounds[getAttributeAtPos(tokenId, 3)];
}
// Used for background only - inverts the RGB values to make a background color for the randomized palette
function invertColors(uint256 tokenId) internal view returns (string[2] memory) {
bytes1 red = bytes1(getAttributeAtPos(tokenId, 0));
bytes1 green = bytes1(getAttributeAtPos(tokenId, 1));
bytes1 blue = bytes1(getAttributeAtPos(tokenId, 2));
return [
string(abi.encodePacked(toString(uint8(~red)),',', toString(uint8(~green)),',', toString(uint8(~blue)))),
string(abi.encodePacked(toString(uint8(~green)),',', toString(uint8(~blue)),',', toString(uint8(~red))))
];
}
// Returns CSS animations used for the animation pattern
function buildAnimation(uint256 tokenId) internal view returns (string memory) {
string[3][5] memory filters = [
['hue-rotate(0deg)', 'hue-rotate(180deg)', 'hue-rotate(-180deg)'],
['hue-rotate(0deg)', 'hue-rotate(-90deg)', 'hue-rotate(90deg)'],
['saturate(1) invert(0)', 'saturate(1.8) invert(1)', 'saturate(0.5) invert(0.2)'],
['sepia(0)', 'sepia(0.5)', 'sepia(0.8)'],
['sepia(0) invert(0)', 'sepia(0.5) invert(1)', 'sepia(0.8) invert(0.6)']
];
string[3][5] memory transforms = [
['scale(1)', 'scale(1)', 'scale(1)'],
['scale(1)', 'scale(0.8)', 'scale(1.2)'],
['scale(1)', 'scale(1.6)', 'scale(1.2)'],
['rotate(0deg)', 'rotate(45deg)', 'rotate(-45deg)'],
['translate(0)', 'translate(16px)', 'translate(-16px)']
// ['translate(0)', 'translate(-50%)']
];
string memory o = string(
abi.encodePacked(
'@keyframes a{25%{filter:',
filters[getAttributeAtPos(tokenId, 4)][0],
';transform:',transforms[getAttributeAtPos(tokenId, 6)][0],
';}50%{filter:',
filters[getAttributeAtPos(tokenId, 4)][1],
';transform:',transforms[getAttributeAtPos(tokenId, 6)][1],
';}75%{filter:',filters[getAttributeAtPos(tokenId, 4)][0],
';transform:',transforms[getAttributeAtPos(tokenId, 6)][0],
';}100%{filter:',filters[getAttributeAtPos(tokenId, 4)][2],
';transform:',transforms[getAttributeAtPos(tokenId, 6)][2],';}}'
)
);
return o;
}
// Takes in a tokenId and a "max" number as the ceiling to randomly pull
function genRandomNum(uint256 tokenId, uint8 max) internal returns (bytes1) {
return bytes1(randMod(tokenId, max));
}
// Returns the value of each attribute at a specific position
function getAttributeAtPos(uint256 tokenId, uint8 pos) internal view returns (uint8) {
return uint8(tokenIdToDNA[tokenId][pos]);
}
// Returns a seed; a uint of the DNA that's useful for performing math
function getDNASeed(bytes10 DNA, uint256 tokenId) internal pure returns (uint64) {
return uint64(uint256(keccak256(abi.encodePacked(
DNA,
tokenId
))));
}
// UTIL FUNCTIONS
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
function randMod(uint256 tokenId, uint8 _modulo) internal returns(uint8) {
// increase nonce
randNonce++;
return uint8(uint256(
keccak256(
abi.encodePacked(
block.difficulty,
block.timestamp,
msg.sender,
randNonce,
tokenId)
)
)) % _modulo;
}
// Taken from Autoglyphs by Larva Labs
function abs(int n) internal pure returns (int) {
if (n >= 0) return n;
return -n;
}
function subtractBitwise(bytes1 a, bytes1 b) internal pure returns (bytes1) {
while (b != 0) {
bytes1 borrow = (~a) & b;
a = a ^ b;
b = borrow << 1;
}
return a;
}
}