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ERC-721
Overview
Max Total Supply
39 STC
Holders
26
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
3 STCLoading...
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| # | Exchange | Pair | Price | 24H Volume | % Volume |
|---|
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Contract Source Code Verified (Exact Match)
Contract Name:
Sentence
Compiler Version
v0.8.9+commit.e5eed63a
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "./common/EnumerableMap.sol";
import "./common/Descriptor.sol";
import "./Word.sol";
contract Sentence is ERC721, ERC721Enumerable, Ownable {
// lib
using EnumerableMap for EnumerableMap.Bytes32ToUintMap;
using Strings for uint256;
// struct
// constant
// storage
uint256 private _counter;
Word public wordAddress;
string private _basePath;
mapping(bytes32 => uint256) public sentenceHash2TokenID;
mapping(uint256 => bytes32) public sentenceTokenID2Hash;
mapping(bytes32 => string) public sentenceHash2String;
mapping(uint256 => uint256) public sentenceTokenID2Color;
// event
constructor(address _word) ERC721("Sentence", "STC") {
wordAddress = Word(_word);
}
function splitSentence(string memory sentence)
public
pure
returns (string[] memory words)
{
bytes memory b = bytes(sentence);
uint16 len = uint16(b.length);
require(len >= 1 && len <= 319, "sentence length illegal!");
uint16 count = 0;
uint16 code = uint8(b[0]);
require(
code >= 32 && code <= 126,
"sentence contains illegal characters!"
);
bool isPrevWord = (code >= 48 && code <= 57) ||
(code >= 65 && code <= 90) ||
(code >= 97 && code <= 122);
bool isWord = false;
uint16[] memory arrIndex = new uint16[](320);
uint16 arrIndexIndex = 0;
if (isPrevWord) {
arrIndex[arrIndexIndex++] = 0;
}
for (uint16 i = 1; i < len - 1; ++i) {
code = uint8(b[i]);
require(
code >= 32 && code <= 126,
"sentence contains illegal characters!"
);
isWord =
(code >= 48 && code <= 57) ||
(code >= 65 && code <= 90) ||
(code >= 97 && code <= 122);
if (isWord && !isPrevWord) {
arrIndex[arrIndexIndex++] = i;
} else if (!isWord && isPrevWord) {
arrIndex[arrIndexIndex++] = i;
count++;
}
isPrevWord = isWord;
}
code = uint8(b[len - 1]);
require(
code >= 32 && code <= 126,
"sentence contains illegal characters!"
);
isWord =
(code >= 48 && code <= 57) ||
(code >= 65 && code <= 90) ||
(code >= 97 && code <= 122);
if (isWord) {
if (isPrevWord) {
arrIndex[arrIndexIndex++] = len;
} else {
arrIndex[arrIndexIndex++] = len - 1;
arrIndex[arrIndexIndex++] = len;
}
count++;
} else {
if (isPrevWord) {
arrIndex[arrIndexIndex++] = len - 1;
count++;
}
}
words = new string[](count);
for (uint16 i = 0; i < count; ++i) {
uint16 start = arrIndex[i * 2];
uint16 end = arrIndex[i * 2 + 1];
bytes memory word = new bytes(end - start);
for (uint16 j = start; j < end; ++j) {
word[j - start] = b[j];
}
words[i] = string(word);
}
}
function queryPrice(string memory sentence)
public
view
returns (uint256 ret)
{
string[] memory words = splitSentence(sentence);
bytes32[] memory wordHashs = new bytes32[](words.length);
uint256 price = wordAddress.sentenceWordPrice();
for (uint256 i = 0; i < words.length; ++i) {
bytes32 wordHash = wordAddress.getWordHash(words[i]);
if (wordAddress.isWordLock(wordHash)) {
continue;
}
bool find = false;
for (uint256 j = 0; j < i; ++j){
if (wordHash == wordHashs[j]){
find = true;
continue;
}
}
if (find){
continue;
}
wordHashs[i] = wordHash;
ret += price;
}
}
function mint(string memory sentence, uint24 color) public payable {
string[] memory words = splitSentence(sentence);
bytes memory byteSentence = bytes(sentence);
bytes memory byteLowerCaseSentence = new bytes(byteSentence.length);
require((uint8)(byteSentence[byteSentence.length - 1]) != 32, "space at end");
// tolowercase
for (uint256 i = 0; i < byteLowerCaseSentence.length; ++i) {
if (byteSentence[i] >= 0x41 && byteSentence[i] <= 0x5a) {
byteLowerCaseSentence[i] = bytes1(uint8(byteSentence[i]) + 32);
}
else{
byteLowerCaseSentence[i] = byteSentence[i];
}
}
bytes32 hashSentence = keccak256(byteLowerCaseSentence);
require(sentenceHash2TokenID[hashSentence] == 0, "sentence exsit!");
// mint token
_counter++;
_mint(msg.sender, _counter);
sentenceHash2TokenID[hashSentence] = _counter;
sentenceHash2String[hashSentence] = sentence;
sentenceTokenID2Hash[_counter] = hashSentence;
sentenceTokenID2Color[_counter] = color;
// word proc
wordAddress.sentenceMint{value:msg.value}(_counter, words);
}
function queryTokenID(string memory sentence) public view returns (uint256) {
bytes memory byteSentence = bytes(sentence);
// tolowercase
for (uint256 i = 0; i < byteSentence.length; ++i) {
if (byteSentence[i] >= 0x41 && byteSentence[i] <= 0x5a) {
byteSentence[i] = bytes1(uint8(byteSentence[i]) + 32);
}
}
return sentenceHash2TokenID[keccak256(byteSentence)];
}
function querySentence(uint256 tokenID) public view returns (string memory) {
return sentenceHash2String[sentenceTokenID2Hash[tokenID]];
}
// url
function setBaseURI(string calldata path) public onlyOwner {
_basePath = path;
}
function tokenURI(uint256 tokenId)
public
view
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if (bytes(_basePath).length > 0) {
return string(abi.encodePacked(_basePath, tokenId.toString()));
}
return Descriptor.GetSentenceDesc(tokenId, sentenceHash2String[sentenceTokenID2Hash[tokenId]], uint24(sentenceTokenID2Color[tokenId]));
}
// The following functions are overrides required by Solidity.
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal override(ERC721, ERC721Enumerable) {
super._beforeTokenTransfer(from, to, tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/structs/EnumerableMap.sol)
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
/**
* @dev Library for managing an enumerable variant of Solidity's
* https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`]
* type.
*
* Maps have the following properties:
*
* - Entries are added, removed, and checked for existence in constant time
* (O(1)).
* - Entries are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableMap for EnumerableMap.UintToAddressMap;
*
* // Declare a set state variable
* EnumerableMap.UintToAddressMap private myMap;
* }
* ```
*
* As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are
* supported.
*/
library EnumerableMap {
using EnumerableSet for EnumerableSet.Bytes32Set;
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Map type with
// bytes32 keys and values.
// The Map implementation uses private functions, and user-facing
// implementations (such as Uint256ToAddressMap) are just wrappers around
// the underlying Map.
// This means that we can only create new EnumerableMaps for types that fit
// in bytes32.
struct Map {
// Storage of keys
EnumerableSet.Bytes32Set _keys;
mapping(bytes32 => bytes32) _values;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function _set(
Map storage map,
bytes32 key,
bytes32 value
) private returns (bool) {
map._values[key] = value;
return map._keys.add(key);
}
/**
* @dev Removes a key-value pair from a map. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function _remove(Map storage map, bytes32 key) private returns (bool) {
delete map._values[key];
return map._keys.remove(key);
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function _contains(Map storage map, bytes32 key) private view returns (bool) {
return map._keys.contains(key);
}
/**
* @dev Returns the number of key-value pairs in the map. O(1).
*/
function _length(Map storage map) private view returns (uint256) {
return map._keys.length();
}
/**
* @dev Returns the key-value pair stored at position `index` in the map. O(1).
*
* Note that there are no guarantees on the ordering of entries inside the
* array, and it may change when more entries are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
bytes32 key = map._keys.at(index);
return (key, map._values[key]);
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*/
function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) {
bytes32 value = map._values[key];
if (value == bytes32(0)) {
return (_contains(map, key), bytes32(0));
} else {
return (true, value);
}
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function _get(Map storage map, bytes32 key) private view returns (bytes32) {
bytes32 value = map._values[key];
require(value != 0 || _contains(map, key), "EnumerableMap: nonexistent key");
return value;
}
/**
* @dev Same as {_get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {_tryGet}.
*/
function _get(
Map storage map,
bytes32 key,
string memory errorMessage
) private view returns (bytes32) {
bytes32 value = map._values[key];
require(value != 0 || _contains(map, key), errorMessage);
return value;
}
// Bytes32ToUintMap
struct Bytes32ToUintMap {
Map _inner;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function set(
Bytes32ToUintMap storage map,
bytes32 key,
uint256 value
) internal returns (bool) {
return _set(map._inner, key, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function remove(Bytes32ToUintMap storage map, bytes32 key) internal returns (bool) {
return _remove(map._inner, key);
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function contains(Bytes32ToUintMap storage map, bytes32 key) internal view returns (bool) {
return _contains(map._inner, key);
}
/**
* @dev Returns the number of elements in the map. O(1).
*/
function length(Bytes32ToUintMap storage map) internal view returns (uint256) {
return _length(map._inner);
}
/**
* @dev Returns the element stored at position `index` in the set. O(1).
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32ToUintMap storage map, uint256 index) internal view returns (bytes32, uint256) {
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (key, uint256(value));
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*
* _Available since v3.4._
*/
function tryGet(Bytes32ToUintMap storage map, bytes32 key) internal view returns (bool, uint256) {
(bool success, bytes32 value) = _tryGet(map._inner, key);
return (success, uint256(value));
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function get(Bytes32ToUintMap storage map, bytes32 key) internal view returns (uint256) {
return uint256(_get(map._inner, key));
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
library Descriptor {
bytes internal constant TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
bytes internal constant FONT_DATA = "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";
/// @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);
}
function toString(uint256 value) internal pure returns (string memory) {
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 GetSentenceDesc(uint256 tokenId, string memory sentence, uint24 color) public pure returns (string memory){
string memory output = string(
abi.encodePacked(
'<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMiDYMid meet" viewBox="0 0,360,360"><style>@font-face {font-family: "Unifont";font-style: normal;font-weight: normal;src: url(data:font/woff;base64,',
FONT_DATA,
') format("woff");}</style><style>.base{fill:rgb(',
toString(uint8(bytes3(color)[0])),
',',
toString(uint8(bytes3(color)[1])),
',',
toString(uint8(bytes3(color)[2])),
'); font-family:Unifont;font-size:22px;text-anchor:start;white-space:pre}</style><rect width="100%" height="100%" fill="black" />'
)
);
bytes memory b = bytes(sentence);
uint256 len = b.length / 29;
uint256 startPosY = 35;
uint256 i = 0;
for (; i < len; ++i){
bytes memory temp = new bytes(29);
for (uint256 j = 0; j < 29; ++j){
temp[j] = b[i*29+j];
}
bytes memory line = abi.encodePacked(
'<text x="20" y="',
toString(startPosY + i * 30),
'" class="base"><![CDATA[',
temp,
']]></text>'
);
output = string(abi.encodePacked(output, line));
}
uint256 remain = b.length % 29;
if (remain > 0){
bytes memory temp = new bytes(remain);
for (uint256 j = 0; j < remain; ++j){
temp[j] = b[i*29+j];
}
bytes memory line = abi.encodePacked(
'<text x="20" y="',
toString(startPosY + i * 30),
'" class="base"><![CDATA[',
temp,
']]></text>'
);
output = string(abi.encodePacked(output, line));
}
output = string(abi.encodePacked(output, "</svg>"));
string memory json = encode(
bytes(
string(
abi.encodePacked(
'{"name": "Sentence#',
toString(tokenId),
'", "description": "", "image": "data:image/svg+xml;base64,',
encode(bytes(output)),
'"}'
)
)
)
);
output = string(
abi.encodePacked("data:application/json;base64,", json)
);
return output;
}
function GetWordDesc(uint256 tokenId, string memory word) public pure returns (string memory) {
string memory output = string(
abi.encodePacked(
'<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMiDYMid meet" viewBox="0 0,360,360"><style>@font-face {font-family: "Unifont";font-style: normal;font-weight: normal;src: url(data:font/woff;base64,',
FONT_DATA,
') format("woff");}</style><style>.base{fill:rgb(255,255,255); font-family:Unifont;font-size:22px;text-anchor:middle}</style><rect width="100%" height="100%" fill="black" /><text x="180" y="195" class="base">',
word,
"</text></svg>"
)
);
string memory json = encode(
bytes(
string(
abi.encodePacked(
'{"name": "Word#',
toString(tokenId),
'", "description": "", "image": "data:image/svg+xml;base64,',
encode(bytes(output)),
'"}'
)
)
)
);
output = string(
abi.encodePacked("data:application/json;base64,", json)
);
return output;
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "./common/EnumerableMap.sol";
import "./common/Descriptor.sol";
contract Word is ERC721, ERC721Enumerable, Ownable, ReentrancyGuard {
// lib
using EnumerableMap for EnumerableMap.Bytes32ToUintMap;
using Strings for uint256;
using ECDSA for bytes32;
// struct
// constant
uint256 public constant mintPrice = 0.1 ether;
uint256 public constant sentenceWordPrice = 0.01 ether;
uint256 public constant publicMintDate = 1662408000;
uint256 public constant whitelistMintMaxNum = 10;
uint256[] public whitelistMintPrize = [0.08 ether, 0.04 ether, 0.01 ether];
uint256[] public whitelistMintDate = [1662321600, 1662235200, 1662148800];
// storage
uint256 private _counter;
uint256 public maxSupply;
mapping(bytes32 => uint256) public wordHash2TokenID;
mapping(uint256 => bytes32) public wordTokenID2Hash;
mapping(bytes32 => string) public wordHash2String;
EnumerableMap.Bytes32ToUintMap private _lockWord;
string private _basePath;
uint256 public mintRevenue;
address public senteceAddress;
mapping(bytes32 => uint256[]) public sentenceMintTokenIDs;
mapping(uint256 => uint256) public sentenceMintRevenue;
address public mineAddress;
uint256 public feePer = 0;
mapping(address => uint256) public whitelistMintNum;
address public signAddress;
// event
event ClaimSentenceRevenue(uint256 tokenID);
event FeePerChange(uint256 newFee);
constructor(address _mineAddress, address _signAddress) ERC721("Word", "WD") {
mineAddress = _mineAddress;
signAddress = _signAddress;
}
function setSignAddress(address _signAddress) public onlyOwner{
signAddress = _signAddress;
}
function setSentenceAddress(address addr) public onlyOwner {
senteceAddress = addr;
}
function setMineAddress(address addr) public onlyOwner{
mineAddress = addr;
}
function setMaxSupply(uint256 num) public onlyOwner {
maxSupply = num;
}
function setFeePer(uint256 per) public onlyOwner{
require(per <= 1000, "per overflow");
feePer = per;
emit FeePerChange(per);
}
function updateLockWord(string[] memory words, uint256[] memory wordDates)
public
onlyOwner
{
for (uint256 i = 0; i < words.length; ++i) {
string memory tempStr = toLowerCase(words[i]);
bytes32 tempHash = keccak256(bytes(tempStr));
_lockWord.set(tempHash, wordDates[i]);
wordHash2String[tempHash] = tempStr;
}
}
function getAllLockWord()
public
view
returns (string[] memory, uint256[] memory)
{
uint256 len = _lockWord.length();
string[] memory words = new string[](len);
uint256[] memory dates = new uint256[](len);
bytes32 tempHash;
for (uint256 i = 0; i < len; ++i) {
(tempHash, dates[i]) = _lockWord.at(i);
words[i] = wordHash2String[tempHash];
}
return (words, dates);
}
function toLowerCase(string memory word)
public
pure
returns (string memory)
{
unchecked {
bytes memory s = bytes(word);
for (uint256 i = 0; i < s.length; ++i) {
uint8 temp = uint8(s[i]);
require(
(temp >= 0x30 && temp <= 0x39) ||
(temp >= 0x41 && temp <= 0x5a) ||
(temp >= 0x61 && temp <= 0x7a),
"word contains illegal characters!"
);
if (temp >= 0x41 && temp <= 0x5a) {
s[i] = bytes1(temp + 32);
}
}
}
return word;
}
function whitelistMint(string memory word, uint256 level, bytes calldata sig) public payable{
require(level < whitelistMintDate.length, "level error");
require(block.timestamp >= whitelistMintDate[level], "mint date is not enabled");
require(whitelistMintNum[msg.sender] < whitelistMintMaxNum, "mint num limit");
require(block.timestamp < publicMintDate, "public mint enabled");
bytes32 hash = keccak256(abi.encode(msg.sender, level, address(this)));
require(hash.recover(sig) == signAddress, "sign error");
whitelistMintNum[msg.sender]++;
_mint(word, whitelistMintPrize[level]);
}
function mint(string memory word) public payable {
require(block.timestamp >= publicMintDate, "mint date is not enabled");
_mint(word, mintPrice);
}
function _mint(string memory word, uint256 price) private {
require(
maxSupply <= 0 || totalSupply() < maxSupply,
"max supply limit"
);
word = toLowerCase(word);
bytes memory s = bytes(word);
bytes32 wordHash = keccak256(s);
require(s.length > 0 && s.length <= 18, "word length illegal!");
require(msg.value == price, "eth illegal!");
require(_exists(wordHash2TokenID[wordHash]) == false, "word exist!");
(bool suc, uint256 date) = _lockWord.tryGet(wordHash);
if (suc) {
require(date > 0 && block.timestamp >= date, "word locked!");
}
unchecked {
mintRevenue += msg.value;
_counter++;
}
_mint(msg.sender, _counter);
wordHash2TokenID[wordHash] = _counter;
wordHash2String[wordHash] = word;
wordTokenID2Hash[_counter] = wordHash;
}
function sentenceMint(uint256 tokenID, string[] memory words)
public
payable
{
require(msg.sender == senteceAddress, "sentence address error!");
unchecked {
uint256 price = 0;
uint256 mineAmount = 0;
uint256 feeRevenueUnit = (sentenceWordPrice / 10000) * feePer;
uint256 priceUnit = sentenceWordPrice - feeRevenueUnit;
uint256 feeRevenue = 0;
string memory word;
bytes32 wordHash;
uint256 wordTokenID;
bytes32[] memory wordHashs = new bytes32[](words.length);
for (uint256 i = 0; i < words.length; ++i) {
word = toLowerCase(words[i]);
wordHash = keccak256(bytes(word));
bool find = false;
for (uint256 j = 0; j < i; ++j) {
if (wordHash == wordHashs[j]) {
find = true;
continue;
}
}
if (find) {
continue;
}
wordHashs[i] = wordHash;
if (!isWordLock(wordHash)) {
wordTokenID = wordHash2TokenID[wordHash];
price += sentenceWordPrice;
feeRevenue += feeRevenueUnit;
if (wordTokenID != 0){
sentenceMintRevenue[wordTokenID] += priceUnit;
}
else{
mineAmount += priceUnit;
}
}
sentenceMintTokenIDs[wordHash].push(tokenID);
}
mintRevenue += feeRevenue;
require(msg.value == price, "eth not enough");
if (mineAmount > 0){
_sendEth(mineAddress, mineAmount);
}
}
}
function sentenceMintNum(bytes32 wordHash) public view returns (uint256){
return sentenceMintTokenIDs[wordHash].length;
}
function queryTokenID(string memory word) public view returns (uint256) {
return wordHash2TokenID[keccak256(bytes(toLowerCase(word)))];
}
function queryWord(uint256 tokenID) public view returns (string memory) {
return wordHash2String[wordTokenID2Hash[tokenID]];
}
function isWordLock(bytes32 wordHash) public view returns (bool) {
if (_exists(wordHash2TokenID[wordHash])) {
return false;
}
(bool suc, uint256 date) = _lockWord.tryGet(wordHash);
if (suc && (date == 0 || block.timestamp < date)) {
return true;
}
return false;
}
function getWordHash(string memory word) public pure returns (bytes32) {
return keccak256(bytes(toLowerCase(word)));
}
function ownerClaimMintRevenue() public onlyOwner nonReentrant {
_sendEth(msg.sender, mintRevenue);
mintRevenue = 0;
}
function claimSentenceRevenue(uint256[] memory tokenIDs)
public
nonReentrant
{
unchecked {
uint256 amount = 0;
uint256 tokenID;
for (uint256 i = 0; i < tokenIDs.length; ++i) {
tokenID = tokenIDs[i];
require(ownerOf(tokenID) == msg.sender, "not owned!");
amount += sentenceMintRevenue[tokenID];
sentenceMintRevenue[tokenID] = 0;
emit ClaimSentenceRevenue(tokenID);
}
_sendEth(msg.sender, amount);
}
}
function _sendEth(address to, uint256 value) private{
(bool suc,) = to.call{value:value}("");
require(suc, "sendEth fail");
}
// url
function setBaseURI(string calldata path) public onlyOwner {
_basePath = path;
}
function tokenURI(uint256 tokenId)
public
view
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if (bytes(_basePath).length > 0) {
return string(abi.encodePacked(_basePath, tokenId.toString()));
}
return Descriptor.GetWordDesc(tokenId, queryWord(tokenId));
}
// The following functions are overrides required by Solidity.
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal override(ERC721, ERC721Enumerable) {
super._beforeTokenTransfer(from, to, tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/structs/EnumerableSet.sol)
pragma solidity ^0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping(bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) {
// Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
if (lastIndex != toDeleteIndex) {
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
}
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
return set._values[index];
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function _values(Set storage set) private view returns (bytes32[] memory) {
return set._values;
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
return _values(set._inner);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(AddressSet storage set) internal view returns (address[] memory) {
bytes32[] memory store = _values(set._inner);
address[] memory result;
assembly {
result := store
}
return result;
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(UintSet storage set) internal view returns (uint256[] memory) {
bytes32[] memory store = _values(set._inner);
uint256[] memory result;
assembly {
result := store
}
return result;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.0;
import "../Strings.sol";
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
uint8 v = uint8((uint256(vs) >> 255) + 27);
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return 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
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../ERC721.sol";
import "./IERC721Enumerable.sol";
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Burnable.sol)
pragma solidity ^0.8.0;
import "../ERC721.sol";
import "../../../utils/Context.sol";
/**
* @title ERC721 Burnable Token
* @dev ERC721 Token that can be irreversibly burned (destroyed).
*/
abstract contract ERC721Burnable is Context, ERC721 {
/**
* @dev Burns `tokenId`. See {ERC721-_burn}.
*
* Requirements:
*
* - The caller must own `tokenId` or be an approved operator.
*/
function burn(uint256 tokenId) public virtual {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved");
_burn(tokenId);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, 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
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/ERC721.sol)
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 {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//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);
_afterTokenTransfer(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);
_afterTokenTransfer(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 from incorrect owner");
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);
_afterTokenTransfer(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 Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @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 {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
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() {
_transferOwnership(_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 {
_transferOwnership(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");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}{
"remappings": [],
"optimizer": {
"enabled": true,
"runs": 200
},
"evmVersion": "london",
"libraries": {
"/contracts/common/Descriptor.sol": {
"Descriptor": "0x256ca7a1e21cB903b0D2b166FD1505299adDF2Ff"
}
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Word","name":"","type":"address"}],"stateMutability":"view","type":"function"}]Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000000cc5d6c786202ba7d938aba1d458c4b84ac77ba3
-----Decoded View---------------
Arg [0] : _word (address): 0x0Cc5D6c786202Ba7d938aba1d458c4B84AC77ba3
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000cc5d6c786202ba7d938aba1d458c4b84ac77ba3
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