文件 1 的 15:0xmusic.sol
pragma solidity ^0.8.0;
import "ERC721.sol";
import "Ownable.sol";
import "ERC721Enumerable.sol";
import "Strings.sol";
import "Counters.sol";
import "ReentrancyGuard.sol";
contract Oxmusic is ERC721, Ownable, ReentrancyGuard {
uint256 private constant fullMintPrice = 0.1 ether;
uint256 private constant wlPrice = 0.07 ether;
uint256 private constant daoPrice = 0.05 ether;
uint256 private randNonce = 0;
uint256 private MAX_SUPPLY;
bool public saleIsActive = false;
bool public wlSaleIsActive = false;
Counters.Counter public counter;
string private baseURLAnimation;
string private baseURLImage;
string private blurredImage;
bool public revealActive = false;
struct Trait {
uint tokenId;
uint len;
uint id;
uint32 dj;
uint staticSongsAllowed;
}
struct TokenUrIDetails {
string orientation;
string name;
string records;
string cycleLength;
string length;
string djStr;
string tokenId;
string description;
string animationUrl;
string imgUrl;
string hexColor;
string entropy;
}
struct RandDetails{
uint rDJ;
uint rId;
uint rLen;
uint rRec;
}
mapping(uint32 => string) private djToNameIndex;
mapping(uint32 => string) private djToOrientation;
mapping(uint32 => string) private djToEntropy;
mapping(uint => string) private bgIdToHex;
mapping(address => uint32) public whiteList;
mapping(address => uint32) public prefList;
mapping(address => uint32) public numberMinted;
mapping(uint => string) public scriptIdxToTx;
mapping(uint256 => Trait) private tokenIdToTrait;
mapping(address => uint32) public compMints;
constructor(string memory baseURLAnimationInput, string memory baseURLImageInput, string memory blurred, uint maxSupply)
ERC721("0xmusic", "music")
{
MAX_SUPPLY = maxSupply;
baseURLAnimation = baseURLAnimationInput;
baseURLImage = baseURLImageInput;
blurredImage = blurred;
djToNameIndex[0] = "420";
djToNameIndex[1] = "Athena";
djToNameIndex[2] = "Dimend";
djToNameIndex[3] = "Drip";
djToNameIndex[4] = "Syn City";
djToNameIndex[5] = "Handel";
djToNameIndex[6] = "Bach";
djToNameIndex[7] = "Serena";
djToOrientation[0] = "southpaw";
djToOrientation[1] = "southpaw";
djToOrientation[2] = "dexter";
djToOrientation[3] = "dexter";
djToOrientation[4] = "dexter";
djToOrientation[5] = "vanward";
djToOrientation[6] = "vanward";
djToOrientation[7] = "southpaw";
bgIdToHex[3] = "2B2727";
bgIdToHex[6] = "192F20";
bgIdToHex[27] = "2B192F";
djToEntropy[0] = "high";
djToEntropy[1] = "high";
djToEntropy[2] = "medium";
djToEntropy[3] = "low";
djToEntropy[4] = "high";
djToEntropy[5] = "low";
djToEntropy[6] = "low";
djToEntropy[7] = "medium";
}
function setSaleIsActive(bool isActive) external onlyOwner {
saleIsActive = isActive;
}
function setIsRevealActive(bool isActive) external onlyOwner {
revealActive = isActive;
}
function setWhiteListSaleIsActive(bool isActive) external onlyOwner {
wlSaleIsActive = isActive;
}
function setBaseURLAnimation(string memory baseURI) external onlyOwner {
baseURLAnimation = baseURI;
}
function setBaseURLImage(string memory baseURI) external onlyOwner {
baseURLImage = baseURI;
}
function addToWL(address input, uint32 count) external onlyOwner {
whiteList[input] = count;
}
function addToDao(address input) external onlyOwner {
prefList[input] = 2;
}
function addToCompMint(address input, uint32 count) external onlyOwner {
compMints[input] = count;
}
function mintWL() external payable {
require(wlSaleIsActive, "Sale must be active");
require(whiteList[msg.sender] > 0, "You are not elligible");
require(wlPrice <= msg.value, "Ether value sent is not correct");
whiteList[msg.sender] -= 1;
_mintInternal();
}
function mintDao() external payable {
require(wlSaleIsActive, "Sale must be active");
require(prefList[msg.sender] > 0, "You are not elligible");
require(daoPrice <= msg.value, "Ether value sent is not correct");
prefList[msg.sender] -= 1;
_mintInternal();
}
function mintArtist() external onlyOwner {
_mintInternal();
}
function mintComp() external {
require(wlSaleIsActive, "Sale must be active");
require(compMints[msg.sender] > 0, "You are not elligible");
compMints[msg.sender] -= 1;
_mintInternal();
}
function mint() external payable {
require(saleIsActive, "Sale must be active to mint");
require(fullMintPrice <= msg.value, "Ether value sent is not correct");
require(numberMinted[msg.sender] < 8, "Exceeded number minted");
_mintInternal();
}
function _mintInternal() private {
require(Counters.current(counter) < MAX_SUPPLY, "Purchase would exceed max supply");
uint mintIndex = Counters.current(counter);
RandDetails memory details = RandDetails(uint(random(100)),random(460) + 1,uint(random(10)),uint(random(100)));
uint32 randDJIdx;
if(details.rDJ > 0 && details.rDJ < 18){
randDJIdx = 4;
} else if(details.rDJ < 32){
randDJIdx = 3;
} else if(details.rDJ < 43){
randDJIdx = 6;
} else if(details.rDJ < 48){
randDJIdx = 5;
} else if(details.rDJ < 59){
randDJIdx = 7;
} else if(details.rDJ < 73){
randDJIdx = 1;
} else if(details.rDJ < 86){
randDJIdx = 0;
} else {
randDJIdx = 2;
}
uint id = details.rId <= 200 ? details.rId/2 : details.rId - 100;
uint32 len = details.rLen < 5 ? 2 : details.rLen < 9 ? 3 : 4;
uint32 records = details.rRec < 70 ? 3 : details.rRec < 96 ? 6 : 27;
Trait memory t = Trait(mintIndex, len, id, randDJIdx, records);
tokenIdToTrait[mintIndex] = t;
numberMinted[msg.sender] = numberMinted[msg.sender] + 1;
Counters.increment(counter);
_safeMint(msg.sender, mintIndex);
}
function getImageDetails(uint256 tokenId) external view returns(uint32,uint, uint, uint) {
Trait memory t = tokenIdToTrait[tokenId];
return (t.dj, t.id, t.len, t.staticSongsAllowed);
}
function getImageURL(uint256 tokenId) public view returns (string memory){
Trait memory t = tokenIdToTrait[tokenId];
if (revealActive) {
return string(abi.encodePacked(baseURLImage,Strings.toString(t.dj),"/",Strings.toString(t.id),"/", Strings.toString(t.staticSongsAllowed) ,'/img.png"'));
} else {
return string(abi.encodePacked(blurredImage, '"'));
}
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
Trait memory t = tokenIdToTrait[tokenId];
TokenUrIDetails memory details = TokenUrIDetails(
djToOrientation[t.dj],
djToNameIndex[t.dj],
Strings.toString(t.staticSongsAllowed),
t.len == 2 ? "short" : t.len == 3 ? "medium" : "long",
Strings.toString(t.len),
Strings.toString(t.dj),
Strings.toString(t.tokenId),
'"description": "Your generative DJ. Hiting play destroys the previous song and creates a brand new song in real-time"',
revealActive ? string(abi.encodePacked(baseURLAnimation,Strings.toString(t.dj),"&id=",
Strings.toString(t.id),"&len=",Strings.toString(t.len), "&bg=",Strings.toString(t.staticSongsAllowed))): "",
getImageURL(tokenId),
bgIdToHex[t.staticSongsAllowed],
djToEntropy[t.dj]
);
string memory djTrait = string(abi.encodePacked('{"trait_type": "0xDJ", "value": "', details.name, '"},{"trait_type": "Orientation", "value": "', details.orientation, '"} ,'));
string memory cycleLengthTrait = string(abi.encodePacked('{"trait_type": "Cycle length", "value": "', details.cycleLength, '"} ,'));
string memory idTrait = string(abi.encodePacked('{"trait_type": "HSL Palette", "value": "', Strings.toString(t.id), '"} ,'));
string memory recordsTrait = string(abi.encodePacked('{"trait_type": "Records", "value": "', details.records, '"}]}'));
string memory entropyTrait = string(abi.encodePacked('{"trait_type": "Entropy", "value": "', details.entropy, '"} ,'));
string memory nameT = string(abi.encodePacked('{"name": "', revealActive ? details.name : "0xDJ", " #", details.tokenId, '",'));
string memory attributes = revealActive ? string(abi.encodePacked('"attributes": [',
djTrait, cycleLengthTrait, idTrait, entropyTrait, recordsTrait)) : '"attributes": []}';
return string(abi.encodePacked('data:application/json,', nameT, details.description, ',"image": "',
details.imgUrl, ',"animation_url": "', details.animationUrl, '","external_url": "https://www.0xmusic.com", "background_color": "', details.hexColor, '" ,',
attributes));
}
function getMasterFromTokenId(uint256 tokenId) external view returns (string memory) {
Trait memory t = tokenIdToTrait[tokenId];
return string(abi.encodePacked(djToNameIndex[t.dj],' ',Strings.toString(tokenId)));
}
function random(uint upperLimit) private returns (uint) {
randNonce++;
return (uint(keccak256(abi.encodePacked(block.difficulty, msg.sender, block.timestamp, randNonce)))) % upperLimit;
}
function withdrawEth() external onlyOwner nonReentrant {
Address.sendValue(payable(owner()), address(this).balance);
}
function setScriptAtIndex(uint idx, string memory txId) external onlyOwner {
scriptIdxToTx[idx] = txId;
}
}
文件 2 的 15:Address.sol
pragma solidity ^0.8.0;
library Address {
function isContract(address account) internal view returns (bool) {
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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);
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
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);
}
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
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);
}
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
文件 3 的 15:Context.sol
pragma solidity ^0.8.0;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
文件 4 的 15:Counters.sol
pragma solidity ^0.8.0;
library Counters {
struct Counter {
uint256 _value;
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
文件 5 的 15:ERC165.sol
pragma solidity ^0.8.0;
import "IERC165.sol";
abstract contract ERC165 is IERC165 {
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
文件 6 的 15:ERC721.sol
pragma solidity ^0.8.0;
import "IERC721.sol";
import "IERC721Receiver.sol";
import "IERC721Metadata.sol";
import "Address.sol";
import "Context.sol";
import "Strings.sol";
import "ERC165.sol";
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
string private _name;
string private _symbol;
mapping(uint256 => address) private _owners;
mapping(address => uint256) private _balances;
mapping(uint256 => address) private _tokenApprovals;
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
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;
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
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())) : "";
}
function _baseURI() internal view virtual returns (string memory) {
return "";
}
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);
}
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
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);
}
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");
}
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
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));
}
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
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"
);
}
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);
}
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
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);
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
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);
}
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;
}
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
文件 7 的 15:ERC721Enumerable.sol
pragma solidity ^0.8.0;
import "ERC721.sol";
import "IERC721Enumerable.sol";
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
mapping(uint256 => uint256) private _ownedTokensIndex;
uint256[] private _allTokens;
mapping(uint256 => uint256) private _allTokensIndex;
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
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];
}
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
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);
}
}
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId;
_ownedTokensIndex[lastTokenId] = tokenIndex;
}
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId;
_allTokensIndex[lastTokenId] = tokenIndex;
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
文件 8 的 15:IERC165.sol
pragma solidity ^0.8.0;
interface IERC165 {
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
文件 9 的 15:IERC721.sol
pragma solidity ^0.8.0;
import "IERC165.sol";
interface IERC721 is IERC165 {
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
function balanceOf(address owner) external view returns (uint256 balance);
function ownerOf(uint256 tokenId) external view returns (address owner);
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
function approve(address to, uint256 tokenId) external;
function getApproved(uint256 tokenId) external view returns (address operator);
function setApprovalForAll(address operator, bool _approved) external;
function isApprovedForAll(address owner, address operator) external view returns (bool);
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
文件 10 的 15:IERC721Enumerable.sol
pragma solidity ^0.8.0;
import "IERC721.sol";
interface IERC721Enumerable is IERC721 {
function totalSupply() external view returns (uint256);
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
function tokenByIndex(uint256 index) external view returns (uint256);
}
文件 11 的 15:IERC721Metadata.sol
pragma solidity ^0.8.0;
import "IERC721.sol";
interface IERC721Metadata is IERC721 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function tokenURI(uint256 tokenId) external view returns (string memory);
}
文件 12 的 15:IERC721Receiver.sol
pragma solidity ^0.8.0;
interface IERC721Receiver {
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
文件 13 的 15:Ownable.sol
pragma solidity ^0.8.0;
import "Context.sol";
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(_msgSender());
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
文件 14 的 15:ReentrancyGuard.sol
pragma solidity ^0.8.0;
abstract contract ReentrancyGuard {
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
modifier nonReentrant() {
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
_status = _ENTERED;
_;
_status = _NOT_ENTERED;
}
}
文件 15 的 15:Strings.sol
pragma solidity ^0.8.0;
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
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 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);
}
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);
}
}
{
"compilationTarget": {
"0xmusic.sol": "Oxmusic"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}
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