文件 1 的 14:Address.sol
pragma solidity ^0.8.1;
library Address {
function isContract(address account) internal view returns (bool) {
return account.code.length > 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 2 的 14:CerealClub.sol
pragma solidity ^0.8.4;
import "./ERC721A.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
error SaleNotStarted();
error SaleInProgress();
error InsufficientPayment();
error IncorrectPayment();
error AccountNotWhitelisted();
error AmountExceedsSupply();
error AmountExceedsWhitelistLimit();
error AmountExceedsTransactionLimit();
error OnlyExternallyOwnedAccountsAllowed();
contract CerealClub is ERC721A, Ownable, ReentrancyGuard {
using ECDSA for bytes32;
uint256 public constant MAX_SUPPLY = 10000;
uint256 private constant AUCTION_START_PRICE = 0.5 ether;
uint256 private constant AUCTION_STEP_PRICE = 0.05 ether;
uint256 private constant AUCTION_STEP_SECONDS = 10 minutes;
uint256 private constant AUCTION_MIN_PRICE = 0.1 ether;
uint256 private constant FAR_FUTURE = 0xFFFFFFFFF;
uint256 private constant MAX_MINTS_PER_TX = 5;
uint256 private _auctionStart = FAR_FUTURE;
uint256 private _presaleStart = FAR_FUTURE;
uint256 private _publicSaleStart = FAR_FUTURE;
uint256 private _auctionMaxSupply = 7300;
uint256 private _marketingSupply = 200;
uint256 private _salePrice = 0.25 ether;
address private _verifier;
string private _baseTokenURI;
mapping(address => bool) private _mintedWhitelist;
event AuctionStart(uint256 price);
event PresaleStart(uint256 price, uint256 supplyRemaining);
event PublicSaleStart(uint256 price, uint256 supplyRemaining);
event SalePaused();
constructor(address verifier) ERC721A("CerealClub", "CEREAL") {
_verifier = verifier;
}
function isAuctionActive() public view returns (bool) {
return block.timestamp > _auctionStart;
}
function getAuctionPrice() public view returns (uint256) {
unchecked {
uint256 steps = (block.timestamp - _auctionStart) / AUCTION_STEP_SECONDS;
if (steps > FAR_FUTURE) {
return AUCTION_START_PRICE;
}
uint256 discount = steps * AUCTION_STEP_PRICE;
if (discount > AUCTION_START_PRICE - AUCTION_MIN_PRICE) {
return AUCTION_MIN_PRICE;
}
return AUCTION_START_PRICE - discount;
}
}
function auctionMint(uint256 quantity) external payable nonReentrant onlyEOA {
if (!isAuctionActive()) revert SaleNotStarted();
if (totalSupply() + quantity > _auctionMaxSupply) revert AmountExceedsSupply();
if (quantity > MAX_MINTS_PER_TX) revert AmountExceedsTransactionLimit();
uint256 price = getAuctionPrice() * quantity;
if (msg.value < price) revert InsufficientPayment();
_safeMint(msg.sender, quantity);
if (msg.value > price) {
payable(msg.sender).transfer(msg.value - price);
}
}
function isPresaleActive() public view returns (bool) {
return block.timestamp > _presaleStart;
}
function getSalePrice() public view returns (uint256) {
return _salePrice;
}
function presaleMint(bytes calldata sig) external payable nonReentrant onlyEOA {
if (!isPresaleActive()) revert SaleNotStarted();
if (!isWhitelisted(msg.sender, sig)) revert AccountNotWhitelisted();
if (hasMintedPresale(msg.sender)) revert AmountExceedsWhitelistLimit();
if (totalSupply() + 1 > MAX_SUPPLY) revert AmountExceedsSupply();
if (getSalePrice() != msg.value) revert IncorrectPayment();
_mintedWhitelist[msg.sender] = true;
_safeMint(msg.sender, 1);
}
function hasMintedPresale(address account) public view returns (bool) {
return _mintedWhitelist[account];
}
function isWhitelisted(address account, bytes calldata sig) internal view returns (bool) {
return ECDSA.recover(keccak256(abi.encodePacked(account)).toEthSignedMessageHash(), sig) == _verifier;
}
function isPublicSaleActive() public view returns (bool) {
return block.timestamp > _publicSaleStart;
}
function publicSaleMint(uint256 quantity) external payable nonReentrant onlyEOA {
if (!isPublicSaleActive()) revert SaleNotStarted();
if (totalSupply() + quantity > MAX_SUPPLY) revert AmountExceedsSupply();
if (getSalePrice() * quantity != msg.value) revert IncorrectPayment();
if (quantity > MAX_MINTS_PER_TX) revert AmountExceedsTransactionLimit();
_safeMint(msg.sender, quantity);
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseTokenURI;
}
function setBaseURI(string calldata baseURI) external onlyOwner {
_baseTokenURI = baseURI;
}
struct MintSummary {
bool isAuctionActive; bool isPresaleActive; bool isPublicSaleActive;
uint256 auctionPrice; uint256 salePrice; uint256 blockTime;
uint256 maxSupply; uint256 totalSupply; uint256 auctionSupply;
uint256 priceAfterNextAuctionPriceDrop; uint256 secondsUntilNextAuctionPriceDrop;
}
function getMintSummary() external view returns (MintSummary memory summary) {
bool auctionActive = isAuctionActive();
uint256 autionPrice = getAuctionPrice();
uint256 secondsUntilNextAuctionPriceDrop;
uint256 priceAfterNextAuctionPriceDrop;
if (auctionActive && autionPrice > AUCTION_MIN_PRICE) {
uint256 elapsedSeconds = block.timestamp - _auctionStart;
uint256 nextSteps = (elapsedSeconds / AUCTION_STEP_SECONDS) + 1;
uint256 nextDiscount = nextSteps * AUCTION_STEP_PRICE;
secondsUntilNextAuctionPriceDrop = AUCTION_STEP_SECONDS - (elapsedSeconds % AUCTION_STEP_SECONDS);
priceAfterNextAuctionPriceDrop = AUCTION_START_PRICE - nextDiscount;
}
summary = MintSummary({
isAuctionActive: auctionActive,
isPresaleActive: isPresaleActive(),
isPublicSaleActive: isPublicSaleActive(),
auctionPrice: autionPrice,
salePrice: getSalePrice(),
maxSupply: MAX_SUPPLY,
totalSupply: totalSupply(),
auctionSupply: _auctionMaxSupply,
priceAfterNextAuctionPriceDrop: priceAfterNextAuctionPriceDrop,
secondsUntilNextAuctionPriceDrop: secondsUntilNextAuctionPriceDrop,
blockTime: block.timestamp
});
}
function tokensOf(address owner) public view returns (uint256[] memory){
uint256 count = balanceOf(owner);
uint256[] memory tokenIds = new uint256[](count);
for (uint256 i; i < count; i++) {
tokenIds[i] = tokenOfOwnerByIndex(owner, i);
}
return tokenIds;
}
function setAuctionMaxSupply(uint256 auctionMaxSupply) external onlyOwner {
if (_marketingSupply + auctionMaxSupply > MAX_SUPPLY)
revert AmountExceedsSupply();
_auctionMaxSupply = auctionMaxSupply;
}
function startAuction() external onlyOwner {
if (isPresaleActive() || isPublicSaleActive()) revert SaleInProgress();
_auctionStart = block.timestamp;
emit AuctionStart(getAuctionPrice());
}
function startPresale(uint256 price) external onlyOwner {
if (isAuctionActive() || isPublicSaleActive()) revert SaleInProgress();
_presaleStart = block.timestamp;
_salePrice = price;
emit PresaleStart(price, MAX_SUPPLY - totalSupply());
}
function startPublicSale() external onlyOwner {
if (isAuctionActive() || isPresaleActive()) revert SaleInProgress();
_publicSaleStart = block.timestamp;
emit PublicSaleStart(getSalePrice(), MAX_SUPPLY - totalSupply());
}
function pauseSale() external onlyOwner {
_auctionStart = FAR_FUTURE;
_presaleStart = FAR_FUTURE;
_publicSaleStart = FAR_FUTURE;
emit SalePaused();
}
modifier onlyEOA() {
if (tx.origin != msg.sender) revert OnlyExternallyOwnedAccountsAllowed();
_;
}
function setSalePrice(uint256 price) external onlyOwner {
_salePrice = price;
}
function marketingMint(uint256 quantity) external onlyOwner {
if (quantity > _marketingSupply) revert AmountExceedsSupply();
if (totalSupply() + quantity > MAX_SUPPLY) revert AmountExceedsSupply();
_marketingSupply -= quantity;
_safeMint(owner(), quantity);
}
function withdraw() external onlyOwner {
payable(owner()).transfer(address(this).balance);
}
}
文件 3 的 14: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 14:ECDSA.sol
pragma solidity ^0.8.0;
import "../Strings.sol";
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return;
} 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");
}
}
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
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;
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
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);
}
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
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;
}
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
}
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
文件 5 的 14: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 14:ERC721A.sol
pragma solidity ^0.8.4;
import '@openzeppelin/contracts/token/ERC721/IERC721.sol';
import '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol';
import '@openzeppelin/contracts/utils/Address.sol';
import '@openzeppelin/contracts/utils/Context.sol';
import '@openzeppelin/contracts/utils/Strings.sol';
import '@openzeppelin/contracts/utils/introspection/ERC165.sol';
error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintedQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerIndexOutOfBounds();
error OwnerQueryForNonexistentToken();
error TokenIndexOutOfBounds();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error UnableDetermineTokenOwner();
error URIQueryForNonexistentToken();
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using Address for address;
using Strings for uint256;
struct TokenOwnership {
address addr;
uint64 startTimestamp;
}
struct AddressData {
uint128 balance;
uint128 numberMinted;
}
uint256 internal _currentIndex;
string private _name;
string private _symbol;
mapping(uint256 => TokenOwnership) internal _ownerships;
mapping(address => AddressData) private _addressData;
mapping(uint256 => address) private _tokenApprovals;
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
function totalSupply() public view override returns (uint256) {
return _currentIndex;
}
function tokenByIndex(uint256 index) public view override returns (uint256) {
if (index >= totalSupply()) revert TokenIndexOutOfBounds();
return index;
}
function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
if (index >= balanceOf(owner)) revert OwnerIndexOutOfBounds();
uint256 numMintedSoFar = totalSupply();
uint256 tokenIdsIdx;
address currOwnershipAddr;
unchecked {
for (uint256 i; i < numMintedSoFar; i++) {
TokenOwnership memory ownership = _ownerships[i];
if (ownership.addr != address(0)) {
currOwnershipAddr = ownership.addr;
}
if (currOwnershipAddr == owner) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
}
assert(false);
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
function balanceOf(address owner) public view override returns (uint256) {
if (owner == address(0)) revert BalanceQueryForZeroAddress();
return uint256(_addressData[owner].balance);
}
function _numberMinted(address owner) internal view returns (uint256) {
if (owner == address(0)) revert MintedQueryForZeroAddress();
return uint256(_addressData[owner].numberMinted);
}
function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
if (!_exists(tokenId)) revert OwnerQueryForNonexistentToken();
unchecked {
for (uint256 curr = tokenId; curr >= 0; curr--) {
TokenOwnership memory ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
}
revert UnableDetermineTokenOwner();
}
function ownerOf(uint256 tokenId) public view override returns (address) {
return ownershipOf(tokenId).addr;
}
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) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
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 override {
address owner = ERC721A.ownerOf(tokenId);
if (to == owner) revert ApprovalToCurrentOwner();
if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) revert ApprovalCallerNotOwnerNorApproved();
_approve(to, tokenId, owner);
}
function getApproved(uint256 tokenId) public view override returns (address) {
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return _tokenApprovals[tokenId];
}
function setApprovalForAll(address operator, bool approved) public override {
if (operator == _msgSender()) revert ApproveToCaller();
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_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 {
_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 override {
_transfer(from, to, tokenId);
if (!_checkOnERC721Received(from, to, tokenId, _data)) revert TransferToNonERC721ReceiverImplementer();
}
function _exists(uint256 tokenId) internal view returns (bool) {
return tokenId < _currentIndex;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, '');
}
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
_mint(to, quantity, _data, true);
}
function _mint(
address to,
uint256 quantity,
bytes memory _data,
bool safe
) internal {
uint256 startTokenId = _currentIndex;
if (to == address(0)) revert MintToZeroAddress();
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
unchecked {
_addressData[to].balance += uint128(quantity);
_addressData[to].numberMinted += uint128(quantity);
_ownerships[startTokenId].addr = to;
_ownerships[startTokenId].startTimestamp = uint64(block.timestamp);
uint256 updatedIndex = startTokenId;
for (uint256 i; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
if (safe && !_checkOnERC721Received(address(0), to, updatedIndex, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
updatedIndex++;
}
_currentIndex = updatedIndex;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
getApproved(tokenId) == _msgSender() ||
isApprovedForAll(prevOwnership.addr, _msgSender()));
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();
if (to == address(0)) revert TransferToZeroAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
_approve(address(0), tokenId, prevOwnership.addr);
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
_ownerships[tokenId].addr = to;
_ownerships[tokenId].startTimestamp = uint64(block.timestamp);
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
if (_exists(nextTokenId)) {
_ownerships[nextTokenId].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
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(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) revert TransferToNonERC721ReceiverImplementer();
else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
文件 7 的 14:IERC165.sol
pragma solidity ^0.8.0;
interface IERC165 {
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
文件 8 的 14:IERC721.sol
pragma solidity ^0.8.0;
import "../../utils/introspection/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 9 的 14: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);
function tokenByIndex(uint256 index) external view returns (uint256);
}
文件 10 的 14: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 11 的 14: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 12 的 14:Ownable.sol
pragma solidity ^0.8.0;
import "../utils/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 13 的 14: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 14 的 14: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": {
"contracts/CerealClub.sol": "CerealClub"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 5000
},
"remappings": []
}
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","name":"maxSupply","type":"uint256"},{"internalType":"uint256","name":"totalSupply","type":"uint256"},{"internalType":"uint256","name":"auctionSupply","type":"uint256"},{"internalType":"uint256","name":"priceAfterNextAuctionPriceDrop","type":"uint256"},{"internalType":"uint256","name":"secondsUntilNextAuctionPriceDrop","type":"uint256"}],"internalType":"struct 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