Contract Source Code:
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
import './SVG.sol';
import './Utils.sol';
import '@openzeppelin/contracts/access/Ownable.sol';
import '@openzeppelin/contracts/utils/Strings.sol';
import '@openzeppelin/contracts/token/ERC721/ERC721.sol';
import './Base64.sol';
struct Coord {
uint256 x;
uint256 y;
}
struct Size {
uint256 width;
uint256 height;
}
struct SquirclePoints {
Coord a;
Coord b;
Coord c;
Coord d;
uint256 pull;
}
contract Orb is ERC721, Ownable {
uint16 private _tokenTokenIdMax = 769;
uint256 private _price = 0.0 ether;
bool private _paused = true;
bool private _enableListMintPaused = true;
address payable private adminWallet =
payable(0x9011Eb570D1bE09eA4d10f38c119DCDF29725c41);
uint16 private constant CANVAS_SIZE = 1200;
mapping(address => uint8) private _enableList;
string constant JSON_PROTOCOL_URI = 'data:application/json;base64,';
string constant SVG_PROTOCOL_URI = 'data:image/svg+xml;base64,';
uint256 private _lastMintedTokenId = 0;
mapping(uint256 => uint256) public seeds;
constructor() ERC721("Markov's Dream: Orb (lite)", 'MDO') {}
function getMaxRings(uint256 seed) private pure returns (uint8) {
return 10 + utils.randomUint8(seed + 0xff0ff) / 24;
}
function getMargin(uint256 seed) private pure returns (uint8) {
return uint8(CANVAS_SIZE / 2 / getMaxRings(seed));
}
function squircle(
Coord memory position,
Size memory size,
uint8 inst,
uint256 seed
) private pure returns (string memory) {
if (inst > getMaxRings(seed)) return '';
SquirclePoints memory points = calculatePoints(size.width, seed);
return
string.concat(
svg.el(
'path',
string.concat(
svg.prop(
'fill',
string.concat(
'url("#p',
utils.uint2str((inst - 1) % getPaletteSize(seed)),
'")'
)
),
svg.prop(
'd',
string.concat(
'M',
coordString(points.a.x + position.x, points.a.y + position.y),
_squircleC(position, points),
_squircleS(position, points)
)
)
)
),
nestedSquircle(size.width, inst, inst == 1 ? 0 : getMargin(seed), seed)
);
}
function getPaletteSize(uint256 seed) public pure returns (uint8) {
uint8 count = utils.randomUint8(seed + 666) / 8 + 1;
if (count > getMaxRings(seed)) return getMaxRings(seed);
return count;
}
function nestedSquircle(
uint256 size,
uint8 inst,
uint256 margin,
uint256 seed
) private pure returns (string memory) {
uint256 newSize = size - getMargin(seed) * 2;
return
svg.el(
'svg',
string.concat(
svg.prop('x', utils.uint2str(margin)),
svg.prop('y', utils.uint2str(margin))
),
svg.el(
'g',
'',
string.concat(
animateTransform(newSize, seed, inst),
squircle(
Coord({x: getMargin(seed), y: getMargin(seed)}),
Size({width: newSize, height: newSize}),
inst + 1,
seed
)
)
)
);
}
function animateTransform(
uint256 width,
uint256 seed,
uint8 inst
) private pure returns (string memory) {
uint256 center = (width + getMargin(seed) * 2) / 2;
string memory centerString = utils.uint2str(center);
uint8 duration = utils.randomUint8(seed / inst) / 4 + 8;
return
string.concat(
'<animateTransform attributeName="transform" type="rotate" from="0 ',
centerString,
' ',
centerString,
'" to="',
utils.randomUint8(seed + 1001 + inst) > 128 ? '-' : '',
'360 ',
centerString,
' ',
centerString,
'" dur="',
utils.uint2str(duration),
's" repeatCount="indefinite"/>'
);
}
function _squircleC(Coord memory position, SquirclePoints memory points)
private
pure
returns (string memory)
{
return
string.concat(
'C',
coordString(points.a.x + position.x, points.pull + position.y),
coordString(points.pull + position.x, points.b.y + position.y),
coordString(points.b.x + position.x, points.b.y + position.y)
);
}
function _squircleS(Coord memory position, SquirclePoints memory points)
private
pure
returns (string memory)
{
return
string.concat(
'S',
coordString(points.c.x + position.x, points.pull + position.y),
coordString(points.c.x + position.x, points.c.y + position.y),
coordString(
points.c.x - points.pull + position.x,
points.d.y + position.y
),
coordString(points.d.x + position.x, points.d.y + position.y),
coordString(
points.a.x + position.x,
points.d.y - points.pull + position.y
),
coordString(points.a.x + position.x, points.a.y + position.y)
);
}
function getPullDiv(uint256 seed) private pure returns (uint8) {
if (utils.randomUint8(seed + 0x8f0ff) > 220) {
return 4;
}
uint8 rings = getMaxRings(seed);
if (rings > 20) {
return 5;
}
if (rings > 13) {
return 6;
}
return 7;
}
function curveString(uint256 seed) private pure returns (string memory) {
uint8 curve = getPullDiv(seed);
if (curve == 4) {
return 'light';
}
if (curve == 5) {
return 'mild';
}
if (curve == 6) {
return 'strong';
}
return 'extreme';
}
function calculatePoints(uint256 size, uint256 seed)
private
pure
returns (SquirclePoints memory)
{
return
SquirclePoints({
a: Coord({x: 0, y: size / 2}),
b: Coord({x: size / 2, y: 0}),
c: Coord({x: size, y: size / 2}),
d: Coord({x: size / 2, y: size}),
pull: size / getPullDiv(seed)
});
}
function coordString(uint256 x, uint256 y)
private
pure
returns (string memory)
{
return string.concat(utils.uint2str(x), ',', utils.uint2str(y), ' ');
}
function defs(uint256 seed) private pure returns (string memory) {
return svg.el('defs', '', linearGradientRefs(seed));
}
function linearGradientRefs(uint256 seed)
private
pure
returns (string memory)
{
string memory result = '';
uint8[3] memory bias = getBias(seed);
for (uint8 i = 0; i < getMaxRings(seed); i++) {
result = string.concat(result, linearGradientRef(i, seed, bias));
}
return result;
}
function getBias(uint256 seed) private pure returns (uint8[3] memory) {
uint8 bias = utils.randomUint8(seed + 11);
if (bias > 191) return [10, 20, 16]; // warm
if (bias > 127) return [13, 13, 10]; // cold
if (bias > 64) return [10, 10, 10]; // unbiased
return [10, 13, 12]; // reddish
}
function getBiasString(uint256 seed) public pure returns (string memory) {
uint8 bias = utils.randomUint8(seed + 11);
if (bias > 191) return 'horny';
if (bias > 127) return 'deep';
if (bias > 64) return 'innocent';
return 'vivid';
}
function randomColor(uint256 seed, uint8[3] memory bias)
private
pure
returns (string memory)
{
return
string.concat(
'rgba(',
utils.uint2str((utils.randomUint8(seed) / bias[0]) * 10),
',',
utils.uint2str((utils.randomUint8(seed + 10) / bias[1]) * 10),
',',
utils.uint2str((utils.randomUint8(seed + 20) / bias[2]) * 10),
',0.',
utils.uint2str(utils.randomUint8(seed + 30)),
')'
);
}
function linearGradientRef(
uint8 id,
uint256 seed,
uint8[3] memory bias
) private pure returns (string memory) {
return
svg.el(
'linearGradient',
string.concat(
svg.prop('id', string.concat('p', utils.uint2str(id))),
svg.prop('x2', '0'),
svg.prop('y2', '1')
),
string.concat(
svg.el(
'stop',
string.concat(
svg.prop('stop-color', randomColor(seed + 100 + id, bias)),
svg.prop('offset', '0')
)
),
svg.el(
'stop',
string.concat(
svg.prop('stop-color', randomColor(seed + 200 + id, bias)),
svg.prop('offset', '1')
)
)
)
);
}
function render(uint256 seed) public pure returns (string memory) {
return
string.concat(
'<svg xmlns="http://www.w3.org/2000/svg" width="1200" height="1200" viewBox="0 0 1200 1200">',
defs(seed),
squircle(
Coord({x: 0, y: 0}),
Size({width: CANVAS_SIZE, height: CANVAS_SIZE}),
1,
seed
),
'</svg>'
);
}
function getSVG(uint256 seed) public pure returns (string memory) {
return Base64.encode(abi.encodePacked(render(seed)));
}
function example() external pure returns (string memory) {
return
render(
12092617800810096820759526468342665250412819988344321001321974471951203194760
);
}
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
'ERC721Metadata: URI query for nonexistent token'
);
bytes memory image = abi.encodePacked(
SVG_PROTOCOL_URI,
getSVG(seeds[tokenId])
);
bytes memory json = abi.encodePacked(
'{"name":"',
'Orb (lite) #',
utils.uint2str(tokenId),
'",',
'"description":"On-chain rotating nested squircles by Harm van den Dorpel, 2022",',
'"image":"',
image,
traitsString(seeds[tokenId]),
'"}]}'
);
return string(abi.encodePacked(JSON_PROTOCOL_URI, Base64.encode(json)));
}
function traitsString(uint256 seed) private pure returns (bytes memory) {
return
abi.encodePacked(
'","attributes":[{"trait_type":"Colours","value":"',
utils.uint2str(getPaletteSize(seed)),
'"},{"trait_type": "Temperament", "value": "',
getBiasString(seed),
'"},{"trait_type":"Rings","value":"',
utils.uint2str(getMaxRings(seed)),
'"},{"trait_type":"Curve","value":"',
curveString(seed)
);
}
function mint(address recipient) external payable {
require(!_paused, 'not activated yet');
require(msg.value >= _price, 'send more ether');
_mint(recipient);
adminWallet.transfer(msg.value);
}
function _mint(address recipient) private {
require(_lastMintedTokenId < _tokenTokenIdMax, 'all minted');
_lastMintedTokenId = _lastMintedTokenId + 1;
uint256 sender = uint256(uint160(address(msg.sender)));
seeds[_lastMintedTokenId] =
uint256(blockhash(block.number - 1)) +
sender +
_lastMintedTokenId;
_safeMint(recipient, _lastMintedTokenId);
}
function setTokenIdMax(uint16 newTokenIdMax) external onlyOwner {
_tokenTokenIdMax = newTokenIdMax;
}
function setPaused(bool newPaused) external onlyOwner {
_paused = newPaused;
}
function setEnableListPaused(bool newPaused) external onlyOwner {
_enableListMintPaused = newPaused;
}
function adminMint(address recipient) external onlyOwner {
_mint(recipient);
}
function updateAdminWallet(address payable _adminWallet) external onlyOwner {
adminWallet = _adminWallet;
}
function setPrice(uint256 newPrice) external onlyOwner {
_price = newPrice;
}
function getPrice() public view returns (uint256) {
return _price;
}
function totalSupply() public view returns (uint256) {
return _lastMintedTokenId;
}
function setEnableListMultiple(address[] memory recipients, uint8 count)
external
onlyOwner
{
for (uint256 i = 0; i < recipients.length; i++) {
_enableList[recipients[i]] = count;
}
}
function setEnableList(address recipient, uint8 count) external onlyOwner {
_enableList[recipient] = count;
}
function getEnableList(address recipient) external view returns (uint8) {
return _enableList[recipient];
}
function mintFromEnableList(address recipient) external payable {
require(!_enableListMintPaused, 'enableList paused');
require(_enableList[recipient] > 0, 'no credits on enablelist');
require(msg.value >= _price, 'send more ether');
_mint(recipient);
_enableList[recipient] -= 1;
adminWallet.transfer(msg.value);
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
import './Utils.sol';
// Core SVG utilitiy library which helps us construct
// onchain SVG's with a simple, web-like API.
library svg {
/* MAIN ELEMENTS */
function g(string memory _props, string memory _children)
internal
pure
returns (string memory)
{
return el('g', _props, _children);
}
function path(string memory _props, string memory _children)
internal
pure
returns (string memory)
{
return el('path', _props, _children);
}
function text(string memory _props, string memory _children)
internal
pure
returns (string memory)
{
return el('text', _props, _children);
}
function line(string memory _props, string memory _children)
internal
pure
returns (string memory)
{
return el('line', _props, _children);
}
function circle(string memory _props, string memory _children)
internal
pure
returns (string memory)
{
return el('circle', _props, _children);
}
function circle(string memory _props)
internal
pure
returns (string memory)
{
return el('circle', _props);
}
function rect(string memory _props, string memory _children)
internal
pure
returns (string memory)
{
return el('rect', _props, _children);
}
function rect(string memory _props)
internal
pure
returns (string memory)
{
return el('rect', _props);
}
function filter(string memory _props, string memory _children)
internal
pure
returns (string memory)
{
return el('filter', _props, _children);
}
function cdata(string memory _content)
internal
pure
returns (string memory)
{
return string.concat('<![CDATA[', _content, ']]>');
}
/* GRADIENTS */
function radialGradient(string memory _props, string memory _children)
internal
pure
returns (string memory)
{
return el('radialGradient', _props, _children);
}
function linearGradient(string memory _props, string memory _children)
internal
pure
returns (string memory)
{
return el('linearGradient', _props, _children);
}
function gradientStop(
uint256 offset,
string memory stopColor,
string memory _props
) internal pure returns (string memory) {
return
el(
'stop',
string.concat(
prop('stop-color', stopColor),
' ',
prop('offset', string.concat(utils.uint2str(offset), '%')),
' ',
_props
)
);
}
function animateTransform(string memory _props)
internal
pure
returns (string memory)
{
return el('animateTransform', _props);
}
function image(string memory _href, string memory _props)
internal
pure
returns (string memory)
{
return
el(
'image',
string.concat(prop('href', _href), ' ', _props)
);
}
/* COMMON */
// A generic element, can be used to construct any SVG (or HTML) element
function el(
string memory _tag,
string memory _props,
string memory _children
) internal pure returns (string memory) {
return
string.concat(
'<',
_tag,
' ',
_props,
'>',
_children,
'</',
_tag,
'>'
);
}
// A generic element, can be used to construct any SVG (or HTML) element without children
function el(
string memory _tag,
string memory _props
) internal pure returns (string memory) {
return
string.concat(
'<',
_tag,
' ',
_props,
'/>'
);
}
// an SVG attribute
function prop(string memory _key, string memory _val)
internal
pure
returns (string memory)
{
return string.concat(_key, '=', '"', _val, '" ');
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
// Core utils used extensively to format CSS and numbers.
library utils {
// used to simulate empty strings
string internal constant NULL = '';
// formats a CSS variable line. includes a semicolon for formatting.
function setCssVar(string memory _key, string memory _val)
internal
pure
returns (string memory)
{
return string.concat('--', _key, ':', _val, ';');
}
// formats getting a css variable
function getCssVar(string memory _key)
internal
pure
returns (string memory)
{
return string.concat('var(--', _key, ')');
}
// formats getting a def URL
function getDefURL(string memory _id)
internal
pure
returns (string memory)
{
return string.concat('url(#', _id, ')');
}
// formats rgba white with a specified opacity / alpha
function white_a(uint256 _a) internal pure returns (string memory) {
return rgba(255, 255, 255, _a);
}
// formats rgba black with a specified opacity / alpha
function black_a(uint256 _a) internal pure returns (string memory) {
return rgba(0, 0, 0, _a);
}
// formats generic rgba color in css
function rgba(
uint256 _r,
uint256 _g,
uint256 _b,
uint256 _a
) internal pure returns (string memory) {
string memory formattedA = _a < 100
? string.concat('0.', utils.uint2str(_a))
: '1';
return
string.concat(
'rgba(',
utils.uint2str(_r),
',',
utils.uint2str(_g),
',',
utils.uint2str(_b),
',',
formattedA,
')'
);
}
// checks if two strings are equal
function stringsEqual(string memory _a, string memory _b)
internal
pure
returns (bool)
{
return
keccak256(abi.encodePacked(_a)) == keccak256(abi.encodePacked(_b));
}
// returns the length of a string in characters
function utfStringLength(string memory _str)
internal
pure
returns (uint256 length)
{
uint256 i = 0;
bytes memory string_rep = bytes(_str);
while (i < string_rep.length) {
if (string_rep[i] >> 7 == 0) i += 1;
else if (string_rep[i] >> 5 == bytes1(uint8(0x6))) i += 2;
else if (string_rep[i] >> 4 == bytes1(uint8(0xE))) i += 3;
else if (string_rep[i] >> 3 == bytes1(uint8(0x1E)))
i += 4;
//For safety
else i += 1;
length++;
}
}
// converts an unsigned 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);
}
function randomUint8(uint256 seed) internal pure returns (uint8) {
return uint8(uint256(keccak256(abi.encodePacked(seed))));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
/// @title Base64
/// @author Brecht Devos - <[email protected]>
/// @notice Provides a function for encoding some bytes in base64
library Base64 {
string internal constant TABLE =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
function encode(bytes memory data) internal pure returns (string memory) {
if (data.length == 0) return "";
// load the table into memory
string memory table = TABLE;
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((data.length + 2) / 3);
// add some extra buffer at the end required for the writing
string memory result = new string(encodedLen + 32);
assembly {
// set the actual output length
mstore(result, encodedLen)
// prepare the lookup table
let tablePtr := add(table, 1)
// input ptr
let dataPtr := data
let endPtr := add(dataPtr, mload(data))
// result ptr, jump over length
let resultPtr := add(result, 32)
// run over the input, 3 bytes at a time
for {
} lt(dataPtr, endPtr) {
} {
dataPtr := add(dataPtr, 3)
// read 3 bytes
let input := mload(dataPtr)
// write 4 characters
mstore(
resultPtr,
shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F))))
)
resultPtr := add(resultPtr, 1)
mstore(
resultPtr,
shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F))))
)
resultPtr := add(resultPtr, 1)
mstore(
resultPtr,
shl(248, mload(add(tablePtr, and(shr(6, input), 0x3F))))
)
resultPtr := add(resultPtr, 1)
mstore(
resultPtr,
shl(248, mload(add(tablePtr, and(input, 0x3F))))
)
resultPtr := add(resultPtr, 1)
}
// padding with '='
switch mod(mload(data), 3)
case 1 {
mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
}
case 2 {
mstore(sub(resultPtr, 1), shl(248, 0x3d))
}
}
return result;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}