Contract Name:
RafldexV2_2
Contract Source Code:
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.12;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
import "@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol";
import "@openzeppelin/contracts/token/ERC1155/utils/ERC1155Holder.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/math/Math.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@chainlink/contracts/src/v0.8/interfaces/LinkTokenInterface.sol";
import "@chainlink/contracts/src/v0.8/interfaces/VRFCoordinatorV2Interface.sol";
import "@chainlink/contracts/src/v0.8/VRFConsumerBaseV2.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
contract RafldexV2_2 is
Ownable,
ReentrancyGuard,
VRFConsumerBaseV2,
ERC721Holder,
ERC1155Holder
{
VRFCoordinatorV2Interface COORDINATOR;
LinkTokenInterface LINKTOKEN;
address constant vrfCoordinator =
0x271682DEB8C4E0901D1a1550aD2e64D568E69909;
address constant link_token_contract =
0x514910771AF9Ca656af840dff83E8264EcF986CA;
bytes32 private keyHash =
0x8af398995b04c28e9951adb9721ef74c74f93e6a478f39e7e0777be13527e7ef;
uint16 private requestConfirmations = 3;
uint32 private callbackGasLimit = 2500000;
uint32 private numWords = 1;
uint64 private subscriptionId = 810;
struct RandomResult {
uint256 randomNumber;
uint256 nomalizedRandomNumber;
}
struct RaffleInfo {
uint256 id;
uint256 size;
}
mapping(uint256 => RandomResult) public requests;
mapping(uint256 => RaffleInfo) public chainlinkRaffleInfo;
event GotSubscription(address _address);
event CollectionWhitelisted(address _collection, uint256 _rafflesnumber);
event UserBlacklisted(address _address);
event AddedTokenPayment(address _address);
event RequestFulfilled(
uint256 requestId,
uint256 randomNumber,
uint256 indexed raffleId
);
event RequestSent(uint256 requestId, uint32 numWords);
event RaffleCreated(
uint256 indexed raffleId,
address[] nftAddress,
uint256[] nftId
);
event RaffleDrawn(
uint256 indexed raffleId,
address indexed winner,
uint256 amountRaised,
uint256 randomNumber
);
event EntryBought(
uint256 indexed raffleId,
address indexed buyer,
uint256 currentSize,
uint256 numberEntries
);
event RaffleSetNotToCancel(uint256 indexed raffleId, address creator);
event RaffleCancelled(uint256 indexed raffleId, uint256 amountRaised);
event SetWinnerTriggered(uint256 indexed raffleId, uint256 amountRaised);
struct EntriesBought {
address player;
uint256 currentEntriesLength;
uint256 entries;
}
mapping(uint256 => EntriesBought[]) public entriesList;
enum STATUS {
CREATED,
PENDING_DRAW,
DRAWING,
DRAWN,
CANCELLED
}
struct RaffleStruct {
STATUS status;
uint256 endTime;
address[] collateralAddress;
uint256[] collateralId;
uint256[] tokenAmount;
uint256 entriesSupply;
uint256 pricePerEntry;
uint256 maxEntriesUser;
address winner;
uint256 randomNumber;
address creator;
uint256 platformPercentage;
address tokenPayment;
uint256 entriesSold;
bool canCancel;
}
RaffleStruct[] public raffles;
struct RaffleCreationHolder {
uint256 startTime;
uint256 endTime;
uint256 countRaffles;
}
mapping(bytes32 => RaffleCreationHolder) public raffleCreationData;
mapping(address => uint256) public numberRafflesMonthCollection;
mapping(bytes32 => uint256) public entriesInfo;
bytes32 public constant OPERATOR_ROLE = keccak256("OPERATOR");
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
address payable private platformWallet =
payable(0x2300Ae69d7D1Ea0457aD79e822422888e3Ee3e87);
uint256 public CHAINLINK_RAFFLE_FEE = 0.015 ether;
uint256 public HOLDER_CREATE_RAFFLE_FEE = 0.02 ether;
uint256 public HOLDER_CREATE_RAFFLE_FEE_DISCOUNT = 0.01 ether;
uint256 public CANCELATION_RAFFLE_FEE_BASE = 0.03 ether;
uint256 public SUBSCRIPTION_PRICE = 0.5 ether;
uint256 public COMMISSION_HOLDERS = 500; //5 %
uint256 public COMMISSION_HOLDERS_DISCOUNT = 350; //3.5%
uint256 public COMMISSION_SUBSCRIBERS = 300; //3%
uint256 public COMMISSION_SUBSCRIBERS_DISCOUNT = 150; //1.5%
mapping(address => bool) public Subscribers;
mapping(address => bool) public TokenPaymentAddresses;
mapping(address => bool) public DiscountTokenPayments;
bool public createEnabledHolders = false;
bool public createEnabledSubscribers = false;
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
constructor() VRFConsumerBaseV2(vrfCoordinator) {
COORDINATOR = VRFCoordinatorV2Interface(vrfCoordinator);
LINKTOKEN = LinkTokenInterface(link_token_contract);
_setupRole(OPERATOR_ROLE, msg.sender);
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
}
modifier onlyRole(bytes32 role, address account) {
_checkRole(role, account);
_;
}
function createRaffleOperator(
uint256 _endTime,
address[] memory _collateralAddress,
uint256[] memory _collateralId,
uint256[] memory _tokenAmount,
address _tokenPayment,
uint256 _pricePerEntry,
uint256 _maxEntriesRaffle,
uint256 _maxEntriesUser
) external onlyRole(OPERATOR_ROLE, msg.sender) returns (uint256) {
require(
_endTime > getCurrentTime(),
"End time can't be < as current time."
);
require(
_collateralAddress.length == _collateralId.length,
"Address, IDs need to have same length."
);
require(
_collateralAddress.length == _tokenAmount.length,
"Address, Token Amounts need to have same length."
);
require(_maxEntriesRaffle > 0, "No entries");
require(
_maxEntriesUser > 0 && _maxEntriesUser <= _maxEntriesRaffle,
"Min entries user > 0 and <= max entries raffle"
);
if (_tokenPayment != address(0)) {
require(
TokenPaymentAddresses[_tokenPayment],
"Token Address not added "
);
}
for (uint256 i = 0; i < _collateralAddress.length; i++) {
require(_collateralAddress[i] != address(0), "NFT is null");
if (_tokenAmount[i] == 0) {
IERC721 nftContract = IERC721(_collateralAddress[i]);
require(
msg.sender == nftContract.ownerOf(_collateralId[i]),
"Only NFT owner can create raffle"
);
} else {
IERC1155 nftContract = IERC1155(_collateralAddress[i]);
require(
nftContract.balanceOf(msg.sender, _collateralId[i]) >=
_tokenAmount[i],
"Dont have enough amount."
);
}
}
uint256 _commissionInBasicPoints = 0;
safeMultipleTransfersFrom(
msg.sender,
address(this),
_collateralAddress,
_collateralId,
_tokenAmount
);
RaffleStruct memory raffle = RaffleStruct({
status: STATUS.CREATED,
endTime: _endTime,
collateralAddress: _collateralAddress,
collateralId: _collateralId,
tokenAmount: _tokenAmount,
pricePerEntry: _pricePerEntry,
entriesSupply: _maxEntriesRaffle,
maxEntriesUser: _maxEntriesUser,
winner: address(0),
randomNumber: 0,
creator: msg.sender,
platformPercentage: _commissionInBasicPoints,
tokenPayment: _tokenPayment,
entriesSold: 0,
canCancel: true
});
raffles.push(raffle);
uint256 idRaffle = raffles.length - 1;
EntriesBought memory entryBought = EntriesBought({
player: address(0),
currentEntriesLength: 0,
entries: 0
});
entriesList[idRaffle].push(entryBought);
delete entriesList[idRaffle][0];
emit RaffleCreated(idRaffle, _collateralAddress, _collateralId);
return idRaffle;
}
function createRaffleHolder(
address createRaffleCollection,
uint256 createRaffleTokenId,
uint256 _endTime,
address[] memory _collateralAddress,
uint256[] memory _collateralId,
uint256[] memory _tokenAmount,
address _tokenPayment,
uint256 _pricePerEntry,
uint256 _maxEntriesRaffle,
uint256 _maxEntriesUser
) external payable returns (uint256) {
require(createEnabledHolders, "Create raffle not set for holders.");
require(
_endTime > getCurrentTime(),
"End time can't be < as current time."
);
require(
_collateralAddress.length == _collateralId.length,
"Address, IDs & Token Amount need to have same length."
);
require(
_collateralAddress.length == _tokenAmount.length,
"Address, Token Amounts need to have same length."
);
require(_maxEntriesRaffle > 0, "No entries");
require(
_maxEntriesUser > 0 && _maxEntriesUser <= _maxEntriesRaffle,
"Min entries user > 0 and <= max entries raffle"
);
if (_tokenPayment != address(0)) {
require(
TokenPaymentAddresses[_tokenPayment],
"Token Address not added "
);
}
for (uint256 i = 0; i < _collateralAddress.length; i++) {
require(_collateralAddress[i] != address(0), "NFT is null");
if (_tokenAmount[i] == 0) {
IERC721 nftContract = IERC721(_collateralAddress[i]);
require(
msg.sender == nftContract.ownerOf(_collateralId[i]),
"Only NFT owner can create raffle"
);
} else {
IERC1155 nftContract = IERC1155(_collateralAddress[i]);
require(
nftContract.balanceOf(msg.sender, _collateralId[i]) >=
_tokenAmount[i],
"Dont have enough amount."
);
}
}
uint256 _commissionInBasicPoints = 0;
if (DiscountTokenPayments[_tokenPayment]) {
require(
msg.value >=
HOLDER_CREATE_RAFFLE_FEE_DISCOUNT + CHAINLINK_RAFFLE_FEE,
"Invalid funds provided"
);
_commissionInBasicPoints = COMMISSION_HOLDERS_DISCOUNT;
} else {
require(
msg.value >= HOLDER_CREATE_RAFFLE_FEE + CHAINLINK_RAFFLE_FEE,
"Invalid funds provided"
);
_commissionInBasicPoints = COMMISSION_HOLDERS;
}
IERC721 createraffleNFT = IERC721(createRaffleCollection);
require(
createraffleNFT.ownerOf(createRaffleTokenId) == msg.sender,
"Not the owner of tokenId"
);
bytes32 hash = keccak256(
abi.encode(createRaffleCollection, createRaffleTokenId)
);
if (raffleCreationData[hash].endTime > getCurrentTime()) {
require(
numberRafflesRemainingPerNFT(
createRaffleCollection,
createRaffleTokenId
) > 0,
"Created too many raffles with your NFT you hold."
);
raffleCreationData[hash].countRaffles++;
} else {
raffleCreationData[hash].startTime = getCurrentTime();
raffleCreationData[hash].endTime = getCurrentTime() + 30 days;
raffleCreationData[hash].countRaffles = 1;
}
safeMultipleTransfersFrom(
msg.sender,
address(this),
_collateralAddress,
_collateralId,
_tokenAmount
);
platformWallet.transfer(msg.value);
RaffleStruct memory raffle = RaffleStruct({
status: STATUS.CREATED,
endTime: _endTime,
collateralAddress: _collateralAddress,
collateralId: _collateralId,
tokenAmount: _tokenAmount,
pricePerEntry: _pricePerEntry,
entriesSupply: _maxEntriesRaffle,
maxEntriesUser: _maxEntriesUser,
winner: address(0),
randomNumber: 0,
creator: msg.sender,
platformPercentage: _commissionInBasicPoints,
tokenPayment: _tokenPayment,
entriesSold: 0,
canCancel: true
});
raffles.push(raffle);
uint256 idRaffle = raffles.length - 1;
EntriesBought memory entryBought = EntriesBought({
player: address(0),
currentEntriesLength: 0,
entries: 0
});
entriesList[idRaffle].push(entryBought);
delete entriesList[idRaffle][0];
emit RaffleCreated(idRaffle, _collateralAddress, _collateralId);
return idRaffle;
}
function createRaffleSubscriber(
uint256 _endTime,
address[] memory _collateralAddress,
uint256[] memory _collateralId,
uint256[] memory _tokenAmount,
address _tokenPayment,
uint256 _pricePerEntry,
uint256 _maxEntriesRaffle,
uint256 _maxEntriesUser
) external payable returns (uint256) {
require(
createEnabledSubscribers,
"Create raffle noot set for subscribers."
);
require(
Subscribers[msg.sender],
"Need to be subscriber to create raffle."
);
require(
_endTime > getCurrentTime(),
"End time can't be < as current time."
);
require(
_collateralAddress.length == _collateralId.length,
"Address, IDs & Token Amount need to have same length."
);
require(
_collateralAddress.length == _tokenAmount.length,
"Address, Token Amounts need to have same length."
);
require(msg.value >= CHAINLINK_RAFFLE_FEE, "Invalid funds provided");
require(_maxEntriesRaffle > 0, "No entries");
require(
_maxEntriesUser > 0 && _maxEntriesUser <= _maxEntriesRaffle,
"Min entries user > 0 and <= max entries raffle"
);
if (_tokenPayment != address(0)) {
require(
TokenPaymentAddresses[_tokenPayment],
"Token Address not added "
);
}
for (uint256 i = 0; i < _collateralAddress.length; i++) {
require(_collateralAddress[i] != address(0), "NFT is null");
if (_tokenAmount[i] == 0) {
IERC721 nftContract = IERC721(_collateralAddress[i]);
require(
msg.sender == nftContract.ownerOf(_collateralId[i]),
"Only NFT owner can create raffle"
);
} else {
IERC1155 nftContract = IERC1155(_collateralAddress[i]);
require(
nftContract.balanceOf(msg.sender, _collateralId[i]) >=
_tokenAmount[i],
"Dont have enough amount."
);
}
}
uint256 _commissionInBasicPoints = 0;
if (DiscountTokenPayments[_tokenPayment]) {
_commissionInBasicPoints = COMMISSION_SUBSCRIBERS_DISCOUNT;
} else {
_commissionInBasicPoints = COMMISSION_SUBSCRIBERS;
}
safeMultipleTransfersFrom(
msg.sender,
address(this),
_collateralAddress,
_collateralId,
_tokenAmount
);
platformWallet.transfer(msg.value);
RaffleStruct memory raffle = RaffleStruct({
status: STATUS.CREATED,
endTime: _endTime,
collateralAddress: _collateralAddress,
collateralId: _collateralId,
tokenAmount: _tokenAmount,
pricePerEntry: _pricePerEntry,
entriesSupply: _maxEntriesRaffle,
maxEntriesUser: _maxEntriesUser,
winner: address(0),
randomNumber: 0,
creator: msg.sender,
platformPercentage: _commissionInBasicPoints,
tokenPayment: _tokenPayment,
entriesSold: 0,
canCancel: true
});
raffles.push(raffle);
uint256 idRaffle = raffles.length - 1;
EntriesBought memory entryBought = EntriesBought({
player: address(0),
currentEntriesLength: 0,
entries: 0
});
entriesList[idRaffle].push(entryBought);
delete entriesList[idRaffle][0];
emit RaffleCreated(idRaffle, _collateralAddress, _collateralId);
return idRaffle;
}
function buyEntry(
uint256 _raffleId,
uint256 _numberEntries,
address _user
) external payable {
RaffleStruct storage raffle = raffles[_raffleId];
require(raffle.endTime > getCurrentTime(), "Raffle Closed on time");
require(raffle.status == STATUS.CREATED, "Raffle is not in CREATED");
require(
_numberEntries > 0 && _numberEntries <= raffle.maxEntriesUser,
"Number entries can't be 0 or more than max entries per user."
);
require(_user != address(0), "Address cant't be null address");
require(
raffle.entriesSold + _numberEntries <=
raffles[_raffleId].entriesSupply,
"Raffle has reached max entries"
);
if (raffle.tokenPayment == address(0)) {
require(
msg.value == raffle.pricePerEntry * _numberEntries,
"msg.value must be equal to the price"
);
} else {
require(
IERC20(raffle.tokenPayment).balanceOf(msg.sender) >=
raffle.pricePerEntry * _numberEntries,
"Need to have in wallet equal or more than ERC20 Token price"
);
IERC20(raffle.tokenPayment).transferFrom(
msg.sender,
address(this),
raffle.pricePerEntry * _numberEntries
);
}
bytes32 hash = keccak256(abi.encode(msg.sender, _raffleId));
require(
entriesInfo[hash] + _numberEntries <= raffle.maxEntriesUser,
"Max entries user reached."
);
entriesInfo[hash] += _numberEntries;
EntriesBought memory entryBought = EntriesBought({
player: _user,
currentEntriesLength: uint256(raffle.entriesSold + _numberEntries),
entries: _numberEntries
});
entriesList[_raffleId].push(entryBought);
raffle.entriesSold += _numberEntries;
emit EntryBought(_raffleId, _user, raffle.entriesSold, _numberEntries);
}
function getCurrentTime() public view returns (uint256) {
return block.timestamp;
}
function getSubscription() external payable {
require(
msg.value == SUBSCRIPTION_PRICE,
"msg.value must be equal to the price"
);
platformWallet.transfer(msg.value);
Subscribers[msg.sender] = true;
emit GotSubscription(msg.sender);
}
function giveorRemoveSubscriptionTo(
address[] memory _addresses,
bool _isSubscriber
) external onlyRole(OPERATOR_ROLE, msg.sender) {
for (uint256 i = 0; i < _addresses.length; i++) {
Subscribers[_addresses[i]] = _isSubscriber;
if (_isSubscriber == true) {
emit GotSubscription(_addresses[i]);
}
}
}
function ChangeSubscriptionFee(uint256 _subscriptionfee)
external
onlyRole(OPERATOR_ROLE, msg.sender)
{
SUBSCRIPTION_PRICE = _subscriptionfee;
}
function ChangeCancellationFeeBase(uint256 _fee)
external
onlyRole(OPERATOR_ROLE, msg.sender)
{
CANCELATION_RAFFLE_FEE_BASE = _fee;
}
function ChangeSubscriptionId(uint64 _id)
external
onlyRole(OPERATOR_ROLE, msg.sender)
{
subscriptionId = _id;
}
function ChangecallbackGasLimit(uint32 _number)
external
onlyRole(OPERATOR_ROLE, msg.sender)
{
callbackGasLimit = _number;
}
function ChangeKeyHash(bytes32 _hash)
external
onlyRole(OPERATOR_ROLE, msg.sender)
{
keyHash = _hash;
}
function setNumberRafflesCollectionWhitelistedPerMonth(
address _collection,
uint256 _rafflesnumber
) external onlyRole(OPERATOR_ROLE, msg.sender) {
numberRafflesMonthCollection[_collection] = _rafflesnumber;
emit CollectionWhitelisted(_collection, _rafflesnumber);
}
function ChangeUserHolderCreateRaffleFee(uint256 _rafflefee)
external
onlyRole(OPERATOR_ROLE, msg.sender)
{
HOLDER_CREATE_RAFFLE_FEE = _rafflefee;
}
function ChangeUserHolderCreateRaffleFeeDiscount(uint256 _rafflefee)
external
onlyRole(OPERATOR_ROLE, msg.sender)
{
HOLDER_CREATE_RAFFLE_FEE_DISCOUNT = _rafflefee;
}
function numberRafflesRemainingPerNFT(
address _collectionaddress,
uint256 _tokenid
) public view returns (uint256) {
uint256 numberRafflesNFT = 0;
if (numberRafflesMonthCollection[_collectionaddress] > 0) {
bytes32 hashNFT = keccak256(
abi.encode(_collectionaddress, _tokenid)
);
numberRafflesNFT =
numberRafflesMonthCollection[_collectionaddress] -
raffleCreationData[hashNFT].countRaffles;
}
return numberRafflesNFT;
}
function changePlatformWalletAddress(address payable _address)
external
onlyOwner
{
platformWallet = _address;
}
function getEntriesBought(uint256 _raffleId)
public
view
returns (EntriesBought[] memory)
{
return entriesList[_raffleId];
}
function addTokenPayment(address _address, bool _isAdded)
external
onlyRole(OPERATOR_ROLE, msg.sender)
{
TokenPaymentAddresses[_address] = _isAdded;
if (_isAdded == true) {
emit AddedTokenPayment(_address);
}
}
function addDiscountTokenPayment(address _address, bool _isAdded)
external
onlyRole(OPERATOR_ROLE, msg.sender)
{
DiscountTokenPayments[_address] = _isAdded;
}
function toggleCreateHoldersEnabled()
external
onlyRole(OPERATOR_ROLE, msg.sender)
{
createEnabledHolders = !createEnabledHolders;
}
function toggleCreateSubscribersEnabled()
external
onlyRole(OPERATOR_ROLE, msg.sender)
{
createEnabledSubscribers = !createEnabledSubscribers;
}
function getWinnerAddressFromRandom(
uint256 _raffleId,
uint256 _normalizedRandomNumber
) public view returns (address) {
uint256 cumulativeSum = 0;
address winner;
EntriesBought[] storage entries = entriesList[_raffleId];
for (uint256 i = 0; i < entries.length; i++) {
cumulativeSum += entries[i].currentEntriesLength;
if (cumulativeSum >= _normalizedRandomNumber) {
winner = entries[i].player;
break;
}
}
require(winner != address(0), "Winner not found");
return winner;
}
function safeMultipleTransfersFrom(
address from,
address to,
address[] memory nftAddresses,
uint256[] memory nftIds,
uint256[] memory nftAmounts
) internal virtual {
for (uint256 i = 0; i < nftIds.length; i++) {
safeTransferFrom(
from,
to,
nftAddresses[i],
nftIds[i],
nftAmounts[i],
""
);
}
}
function safeTransferFrom(
address from,
address to,
address tokenAddress,
uint256 tokenId,
uint256 tokenAmount,
bytes memory _data
) internal virtual {
if (tokenAmount == 0) {
IERC721(tokenAddress).safeTransferFrom(from, to, tokenId, _data);
} else {
IERC1155(tokenAddress).safeTransferFrom(
from,
to,
tokenId,
tokenAmount,
_data
);
}
}
function requestRandomWords(uint256 _id, uint256 _entriesSold)
internal
returns (uint256 requestId)
{
requestId = COORDINATOR.requestRandomWords(
keyHash,
subscriptionId,
requestConfirmations,
callbackGasLimit,
numWords
);
chainlinkRaffleInfo[requestId] = RaffleInfo({
id: _id,
size: _entriesSold
});
RaffleStruct storage raffle = raffles[_id];
raffle.status = STATUS.DRAWING;
emit RequestSent(requestId, numWords);
return requestId;
}
function requestRandomWordsRetry(uint256 _id)
external
onlyRole(OPERATOR_ROLE, msg.sender)
returns (uint256 requestId)
{
RaffleStruct storage raffle = raffles[_id];
requestId = COORDINATOR.requestRandomWords(
keyHash,
subscriptionId,
requestConfirmations,
callbackGasLimit,
numWords
);
chainlinkRaffleInfo[requestId] = RaffleInfo({
id: _id,
size: raffle.entriesSold
});
raffle.status = STATUS.DRAWING;
emit RequestSent(requestId, numWords);
return requestId;
}
function transferNFTsAndFunds(
uint256 _raffleId,
uint256 _normalizedRandomNumber
) internal nonReentrant {
RaffleStruct storage raffle = raffles[_raffleId];
require(raffle.status == STATUS.DRAWING, "Raffle in wrong status");
raffle.randomNumber = _normalizedRandomNumber;
raffle.winner = (raffle.entriesSold == 0)
? raffle.creator
: getWinnerAddressFromRandom(_raffleId, _normalizedRandomNumber);
safeMultipleTransfersFrom(
address(this),
raffle.winner,
raffle.collateralAddress,
raffle.collateralId,
raffle.tokenAmount
);
uint256 amountRaised = raffle.entriesSold * raffle.pricePerEntry;
uint256 amountForPlatform = (
amountRaised * raffle.platformPercentage) / 10000;
uint256 amountForSeller = amountRaised - amountForPlatform;
if (raffle.tokenPayment == address(0)) {
(bool sent, ) = raffle.creator.call{value: amountForSeller}("");
require(sent, "Failed to send Eth");
(bool sent2, ) = platformWallet.call{value: amountForPlatform}("");
require(sent2, "Failed send Eth to Platform");
} else {
IERC20(raffle.tokenPayment).approve(address(this), amountRaised);
bool sent = IERC20(raffle.tokenPayment).transferFrom(
address(this),
raffle.creator,
amountForSeller
);
require(sent, "Failed to send ERC20 Token");
bool sent2 = IERC20(raffle.tokenPayment).transferFrom(
address(this),
platformWallet,
amountForPlatform
);
require(sent2, "Failed to send ERC20 Token to platform");
}
raffle.status = STATUS.DRAWN;
emit RaffleDrawn(
_raffleId,
raffle.winner,
amountRaised,
raffle.randomNumber
);
}
function fulfillRandomWords(
uint256 _requestId,
uint256[] memory _randomWords
) internal override {
uint256 normalizedRandomNumber = (_randomWords[0] %
chainlinkRaffleInfo[_requestId].size) + 1;
RaffleStruct storage raffle = raffles[
chainlinkRaffleInfo[_requestId].id
];
raffle.randomNumber = normalizedRandomNumber;
RandomResult memory result = RandomResult({
randomNumber: _randomWords[0],
nomalizedRandomNumber: normalizedRandomNumber
});
requests[chainlinkRaffleInfo[_requestId].id] = result;
emit RequestFulfilled(
_requestId,
normalizedRandomNumber,
chainlinkRaffleInfo[_requestId].id
);
transferNFTsAndFunds(
chainlinkRaffleInfo[_requestId].id,
normalizedRandomNumber
);
}
function setWinnerRaffle(uint256 _raffleId) external {
RaffleStruct storage raffle = raffles[_raffleId];
require(
raffle.creator == msg.sender || hasRole(OPERATOR_ROLE, msg.sender),
"Not raffle creator or operator."
);
if (hasRole(OPERATOR_ROLE, msg.sender)) {
require(
raffle.entriesSold == raffle.entriesSupply ||
raffle.endTime <= getCurrentTime(),
"Raffle still opened or not sold out"
);
}
require(raffle.status == STATUS.CREATED, "Raffle in wrong status");
raffle.status = STATUS.PENDING_DRAW;
uint256 entriesSold = raffle.entriesSold;
uint256 amountRaised = entriesSold * raffle.pricePerEntry;
if (entriesSold == 0) {
raffle.status = STATUS.DRAWING;
transferNFTsAndFunds(_raffleId, raffle.randomNumber);
} else {
requestRandomWords(_raffleId, entriesSold);
}
emit SetWinnerTriggered(_raffleId, amountRaised);
}
function setWinnerRaffleEmergency(uint256 _raffleId) external onlyRole(OPERATOR_ROLE, msg.sender) {
//function in case that chainlink vrf2 doesnt work
RaffleStruct storage raffle = raffles[_raffleId];
require(raffle.status == STATUS.DRAWING, "Raffle in wrong status");
uint256 entriesSold = raffle.entriesSold;
bytes32 baseHash = keccak256(
abi.encodePacked(
block.number,
block.timestamp,
block.gaslimit,
block.coinbase
)
);
uint256 normalizedRandomNumber = (uint256(baseHash) % entriesSold) + 1;
raffle.randomNumber = normalizedRandomNumber;
transferNFTsAndFunds(
_raffleId,
normalizedRandomNumber
);
}
function cancelRaffle(uint256 _raffleId) external payable {
RaffleStruct storage raffle = raffles[_raffleId];
require(
raffle.creator == msg.sender || hasRole(OPERATOR_ROLE, msg.sender),
"Not raffle creator or Operator."
);
require(
raffle.endTime > getCurrentTime(),
"End time can't be < as current time."
);
require(raffle.status == STATUS.CREATED, "Wrong status");
if (!hasRole(OPERATOR_ROLE, msg.sender)) {
require(raffle.canCancel, "User Can't cancel");
if (raffle.entriesSold == 0) {
require(msg.value == 0, "Not cancelation fee value.");
} else {
require(
msg.value >= CANCELATION_RAFFLE_FEE_BASE,
"Not cancelation fee value."
);
platformWallet.transfer(CANCELATION_RAFFLE_FEE_BASE);
}
}
uint256 txLength = entriesList[_raffleId].length;
require(
txLength <= 200,
"Not cancelation available when it's more than 200 txs."
);
uint256 amountRaised = raffle.entriesSold * raffle.pricePerEntry;
if (raffle.tokenPayment == address(0)) {
for (uint256 i = 0; i < txLength; i++) {
address user = entriesList[_raffleId][i].player;
if (user != address(0)) {
uint256 amountToSend = raffle.pricePerEntry *
entriesList[_raffleId][i].entries;
payable(user).transfer(amountToSend);
}
}
} else {
IERC20(raffle.tokenPayment).approve(address(this), amountRaised);
for (uint256 i = 0; i < txLength; i++) {
address user = entriesList[_raffleId][i].player;
if (user != address(0)) {
uint256 amountToSend = raffle.pricePerEntry *
entriesList[_raffleId][i].entries;
IERC20(raffle.tokenPayment).transferFrom(
address(this),
user,
amountToSend
);
}
}
}
safeMultipleTransfersFrom(
address(this),
raffle.creator,
raffle.collateralAddress,
raffle.collateralId,
raffle.tokenAmount
);
raffle.status = STATUS.CANCELLED;
emit RaffleCancelled(_raffleId, amountRaised);
}
function setRaffleToNotCancel(uint256 _raffleId) external nonReentrant {
RaffleStruct storage raffle = raffles[_raffleId];
require(raffle.creator == msg.sender, "Not raffle creator.");
if (raffle.canCancel == true) {
raffle.canCancel = false;
emit RaffleSetNotToCancel(_raffleId, msg.sender);
}
}
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
function hasRole(bytes32 role, address account)
public
view
virtual
returns (bool)
{
return _roles[role].members[account];
}
function _checkRole(bytes32 role, address account) internal view virtual {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(account),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
function grantRole(bytes32 role, address account)
public
virtual
onlyRole(OPERATOR_ROLE, msg.sender)
{
_grantRole(role, account);
}
function revokeRole(bytes32 role, address account)
public
virtual
onlyRole(OPERATOR_ROLE, msg.sender)
{
_revokeRole(role, account);
}
function _revokeRole(bytes32 role, address account) internal virtual {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
}
}
function _grantRole(bytes32 role, address account) internal virtual {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
import "./math/Math.sol";
import "./math/SignedMath.sol";
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _SYMBOLS = "0123456789abcdef";
uint8 private constant _ADDRESS_LENGTH = 20;
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
unchecked {
uint256 length = Math.log10(value) + 1;
string memory buffer = new string(length);
uint256 ptr;
/// @solidity memory-safe-assembly
assembly {
ptr := add(buffer, add(32, length))
}
while (true) {
ptr--;
/// @solidity memory-safe-assembly
assembly {
mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
}
value /= 10;
if (value == 0) break;
}
return buffer;
}
}
/**
* @dev Converts a `int256` to its ASCII `string` decimal representation.
*/
function toString(int256 value) internal pure returns (string memory) {
return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
unchecked {
return toHexString(value, Math.log256(value) + 1);
}
}
/**
* @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] = _SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
*/
function toHexString(address addr) internal pure returns (string memory) {
return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
}
/**
* @dev Returns true if the two strings are equal.
*/
function equal(string memory a, string memory b) internal pure returns (bool) {
return keccak256(bytes(a)) == keccak256(bytes(b));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/** ****************************************************************************
* @notice Interface for contracts using VRF randomness
* *****************************************************************************
* @dev PURPOSE
*
* @dev Reggie the Random Oracle (not his real job) wants to provide randomness
* @dev to Vera the verifier in such a way that Vera can be sure he's not
* @dev making his output up to suit himself. Reggie provides Vera a public key
* @dev to which he knows the secret key. Each time Vera provides a seed to
* @dev Reggie, he gives back a value which is computed completely
* @dev deterministically from the seed and the secret key.
*
* @dev Reggie provides a proof by which Vera can verify that the output was
* @dev correctly computed once Reggie tells it to her, but without that proof,
* @dev the output is indistinguishable to her from a uniform random sample
* @dev from the output space.
*
* @dev The purpose of this contract is to make it easy for unrelated contracts
* @dev to talk to Vera the verifier about the work Reggie is doing, to provide
* @dev simple access to a verifiable source of randomness. It ensures 2 things:
* @dev 1. The fulfillment came from the VRFCoordinator
* @dev 2. The consumer contract implements fulfillRandomWords.
* *****************************************************************************
* @dev USAGE
*
* @dev Calling contracts must inherit from VRFConsumerBase, and can
* @dev initialize VRFConsumerBase's attributes in their constructor as
* @dev shown:
*
* @dev contract VRFConsumer {
* @dev constructor(<other arguments>, address _vrfCoordinator, address _link)
* @dev VRFConsumerBase(_vrfCoordinator) public {
* @dev <initialization with other arguments goes here>
* @dev }
* @dev }
*
* @dev The oracle will have given you an ID for the VRF keypair they have
* @dev committed to (let's call it keyHash). Create subscription, fund it
* @dev and your consumer contract as a consumer of it (see VRFCoordinatorInterface
* @dev subscription management functions).
* @dev Call requestRandomWords(keyHash, subId, minimumRequestConfirmations,
* @dev callbackGasLimit, numWords),
* @dev see (VRFCoordinatorInterface for a description of the arguments).
*
* @dev Once the VRFCoordinator has received and validated the oracle's response
* @dev to your request, it will call your contract's fulfillRandomWords method.
*
* @dev The randomness argument to fulfillRandomWords is a set of random words
* @dev generated from your requestId and the blockHash of the request.
*
* @dev If your contract could have concurrent requests open, you can use the
* @dev requestId returned from requestRandomWords to track which response is associated
* @dev with which randomness request.
* @dev See "SECURITY CONSIDERATIONS" for principles to keep in mind,
* @dev if your contract could have multiple requests in flight simultaneously.
*
* @dev Colliding `requestId`s are cryptographically impossible as long as seeds
* @dev differ.
*
* *****************************************************************************
* @dev SECURITY CONSIDERATIONS
*
* @dev A method with the ability to call your fulfillRandomness method directly
* @dev could spoof a VRF response with any random value, so it's critical that
* @dev it cannot be directly called by anything other than this base contract
* @dev (specifically, by the VRFConsumerBase.rawFulfillRandomness method).
*
* @dev For your users to trust that your contract's random behavior is free
* @dev from malicious interference, it's best if you can write it so that all
* @dev behaviors implied by a VRF response are executed *during* your
* @dev fulfillRandomness method. If your contract must store the response (or
* @dev anything derived from it) and use it later, you must ensure that any
* @dev user-significant behavior which depends on that stored value cannot be
* @dev manipulated by a subsequent VRF request.
*
* @dev Similarly, both miners and the VRF oracle itself have some influence
* @dev over the order in which VRF responses appear on the blockchain, so if
* @dev your contract could have multiple VRF requests in flight simultaneously,
* @dev you must ensure that the order in which the VRF responses arrive cannot
* @dev be used to manipulate your contract's user-significant behavior.
*
* @dev Since the block hash of the block which contains the requestRandomness
* @dev call is mixed into the input to the VRF *last*, a sufficiently powerful
* @dev miner could, in principle, fork the blockchain to evict the block
* @dev containing the request, forcing the request to be included in a
* @dev different block with a different hash, and therefore a different input
* @dev to the VRF. However, such an attack would incur a substantial economic
* @dev cost. This cost scales with the number of blocks the VRF oracle waits
* @dev until it calls responds to a request. It is for this reason that
* @dev that you can signal to an oracle you'd like them to wait longer before
* @dev responding to the request (however this is not enforced in the contract
* @dev and so remains effective only in the case of unmodified oracle software).
*/
abstract contract VRFConsumerBaseV2 {
error OnlyCoordinatorCanFulfill(address have, address want);
address private immutable vrfCoordinator;
/**
* @param _vrfCoordinator address of VRFCoordinator contract
*/
constructor(address _vrfCoordinator) {
vrfCoordinator = _vrfCoordinator;
}
/**
* @notice fulfillRandomness handles the VRF response. Your contract must
* @notice implement it. See "SECURITY CONSIDERATIONS" above for important
* @notice principles to keep in mind when implementing your fulfillRandomness
* @notice method.
*
* @dev VRFConsumerBaseV2 expects its subcontracts to have a method with this
* @dev signature, and will call it once it has verified the proof
* @dev associated with the randomness. (It is triggered via a call to
* @dev rawFulfillRandomness, below.)
*
* @param requestId The Id initially returned by requestRandomness
* @param randomWords the VRF output expanded to the requested number of words
*/
function fulfillRandomWords(uint256 requestId, uint256[] memory randomWords) internal virtual;
// rawFulfillRandomness is called by VRFCoordinator when it receives a valid VRF
// proof. rawFulfillRandomness then calls fulfillRandomness, after validating
// the origin of the call
function rawFulfillRandomWords(uint256 requestId, uint256[] memory randomWords) external {
if (msg.sender != vrfCoordinator) {
revert OnlyCoordinatorCanFulfill(msg.sender, vrfCoordinator);
}
fulfillRandomWords(requestId, randomWords);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface VRFCoordinatorV2Interface {
/**
* @notice Get configuration relevant for making requests
* @return minimumRequestConfirmations global min for request confirmations
* @return maxGasLimit global max for request gas limit
* @return s_provingKeyHashes list of registered key hashes
*/
function getRequestConfig()
external
view
returns (
uint16,
uint32,
bytes32[] memory
);
/**
* @notice Request a set of random words.
* @param keyHash - Corresponds to a particular oracle job which uses
* that key for generating the VRF proof. Different keyHash's have different gas price
* ceilings, so you can select a specific one to bound your maximum per request cost.
* @param subId - The ID of the VRF subscription. Must be funded
* with the minimum subscription balance required for the selected keyHash.
* @param minimumRequestConfirmations - How many blocks you'd like the
* oracle to wait before responding to the request. See SECURITY CONSIDERATIONS
* for why you may want to request more. The acceptable range is
* [minimumRequestBlockConfirmations, 200].
* @param callbackGasLimit - How much gas you'd like to receive in your
* fulfillRandomWords callback. Note that gasleft() inside fulfillRandomWords
* may be slightly less than this amount because of gas used calling the function
* (argument decoding etc.), so you may need to request slightly more than you expect
* to have inside fulfillRandomWords. The acceptable range is
* [0, maxGasLimit]
* @param numWords - The number of uint256 random values you'd like to receive
* in your fulfillRandomWords callback. Note these numbers are expanded in a
* secure way by the VRFCoordinator from a single random value supplied by the oracle.
* @return requestId - A unique identifier of the request. Can be used to match
* a request to a response in fulfillRandomWords.
*/
function requestRandomWords(
bytes32 keyHash,
uint64 subId,
uint16 minimumRequestConfirmations,
uint32 callbackGasLimit,
uint32 numWords
) external returns (uint256 requestId);
/**
* @notice Create a VRF subscription.
* @return subId - A unique subscription id.
* @dev You can manage the consumer set dynamically with addConsumer/removeConsumer.
* @dev Note to fund the subscription, use transferAndCall. For example
* @dev LINKTOKEN.transferAndCall(
* @dev address(COORDINATOR),
* @dev amount,
* @dev abi.encode(subId));
*/
function createSubscription() external returns (uint64 subId);
/**
* @notice Get a VRF subscription.
* @param subId - ID of the subscription
* @return balance - LINK balance of the subscription in juels.
* @return reqCount - number of requests for this subscription, determines fee tier.
* @return owner - owner of the subscription.
* @return consumers - list of consumer address which are able to use this subscription.
*/
function getSubscription(uint64 subId)
external
view
returns (
uint96 balance,
uint64 reqCount,
address owner,
address[] memory consumers
);
/**
* @notice Request subscription owner transfer.
* @param subId - ID of the subscription
* @param newOwner - proposed new owner of the subscription
*/
function requestSubscriptionOwnerTransfer(uint64 subId, address newOwner) external;
/**
* @notice Request subscription owner transfer.
* @param subId - ID of the subscription
* @dev will revert if original owner of subId has
* not requested that msg.sender become the new owner.
*/
function acceptSubscriptionOwnerTransfer(uint64 subId) external;
/**
* @notice Add a consumer to a VRF subscription.
* @param subId - ID of the subscription
* @param consumer - New consumer which can use the subscription
*/
function addConsumer(uint64 subId, address consumer) external;
/**
* @notice Remove a consumer from a VRF subscription.
* @param subId - ID of the subscription
* @param consumer - Consumer to remove from the subscription
*/
function removeConsumer(uint64 subId, address consumer) external;
/**
* @notice Cancel a subscription
* @param subId - ID of the subscription
* @param to - Where to send the remaining LINK to
*/
function cancelSubscription(uint64 subId, address to) external;
/*
* @notice Check to see if there exists a request commitment consumers
* for all consumers and keyhashes for a given sub.
* @param subId - ID of the subscription
* @return true if there exists at least one unfulfilled request for the subscription, false
* otherwise.
*/
function pendingRequestExists(uint64 subId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface LinkTokenInterface {
function allowance(address owner, address spender) external view returns (uint256 remaining);
function approve(address spender, uint256 value) external returns (bool success);
function balanceOf(address owner) external view returns (uint256 balance);
function decimals() external view returns (uint8 decimalPlaces);
function decreaseApproval(address spender, uint256 addedValue) external returns (bool success);
function increaseApproval(address spender, uint256 subtractedValue) external;
function name() external view returns (string memory tokenName);
function symbol() external view returns (string memory tokenSymbol);
function totalSupply() external view returns (uint256 totalTokensIssued);
function transfer(address to, uint256 value) external returns (bool success);
function transferAndCall(
address to,
uint256 value,
bytes calldata data
) external returns (bool success);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool success);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling 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);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
// Solidity will revert if denominator == 0, unlike the div opcode on its own.
// The surrounding unchecked block does not change this fact.
// See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1, "Math: mulDiv overflow");
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10 ** 64) {
value /= 10 ** 64;
result += 64;
}
if (value >= 10 ** 32) {
value /= 10 ** 32;
result += 32;
}
if (value >= 10 ** 16) {
value /= 10 ** 16;
result += 16;
}
if (value >= 10 ** 8) {
value /= 10 ** 8;
result += 8;
}
if (value >= 10 ** 4) {
value /= 10 ** 4;
result += 4;
}
if (value >= 10 ** 2) {
value /= 10 ** 2;
result += 2;
}
if (value >= 10 ** 1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 256, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/utils/ERC1155Holder.sol)
pragma solidity ^0.8.0;
import "./ERC1155Receiver.sol";
/**
* Simple implementation of `ERC1155Receiver` that will allow a contract to hold ERC1155 tokens.
*
* IMPORTANT: When inheriting this contract, you must include a way to use the received tokens, otherwise they will be
* stuck.
*
* @dev _Available since v3.1._
*/
contract ERC1155Holder is ERC1155Receiver {
function onERC1155Received(
address,
address,
uint256,
uint256,
bytes memory
) public virtual override returns (bytes4) {
return this.onERC1155Received.selector;
}
function onERC1155BatchReceived(
address,
address,
uint256[] memory,
uint256[] memory,
bytes memory
) public virtual override returns (bytes4) {
return this.onERC1155BatchReceived.selector;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/utils/ERC721Holder.sol)
pragma solidity ^0.8.0;
import "../IERC721Receiver.sol";
/**
* @dev Implementation of the {IERC721Receiver} interface.
*
* Accepts all token transfers.
* Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.
*/
contract ERC721Holder is IERC721Receiver {
/**
* @dev See {IERC721Receiver-onERC721Received}.
*
* Always returns `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(address, address, uint256, bytes memory) public virtual override returns (bytes4) {
return this.onERC721Received.selector;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC1155/IERC1155.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] values
);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(
address[] calldata accounts,
uint256[] calldata ids
) external view returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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`.
*
* 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;
/**
* @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 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: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
* or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
* understand this adds an external call which potentially creates a reentrancy vulnerability.
*
* 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 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 the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard signed math utilities missing in the Solidity language.
*/
library SignedMath {
/**
* @dev Returns the largest of two signed numbers.
*/
function max(int256 a, int256 b) internal pure returns (int256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two signed numbers.
*/
function min(int256 a, int256 b) internal pure returns (int256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two signed numbers without overflow.
* The result is rounded towards zero.
*/
function average(int256 a, int256 b) internal pure returns (int256) {
// Formula from the book "Hacker's Delight"
int256 x = (a & b) + ((a ^ b) >> 1);
return x + (int256(uint256(x) >> 255) & (a ^ b));
}
/**
* @dev Returns the absolute unsigned value of a signed value.
*/
function abs(int256 n) internal pure returns (uint256) {
unchecked {
// must be unchecked in order to support `n = type(int256).min`
return uint256(n >= 0 ? n : -n);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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 `IERC721Receiver.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 (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 (token/ERC1155/utils/ERC1155Receiver.sol)
pragma solidity ^0.8.0;
import "../IERC1155Receiver.sol";
import "../../../utils/introspection/ERC165.sol";
/**
* @dev _Available since v3.1._
*/
abstract contract ERC1155Receiver is ERC165, IERC1155Receiver {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return interfaceId == type(IERC1155Receiver).interfaceId || super.supportsInterface(interfaceId);
}
}
// 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 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) (token/ERC1155/IERC1155Receiver.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev _Available since v3.1._
*/
interface IERC1155Receiver is IERC165 {
/**
* @dev Handles the receipt of a single ERC1155 token type. This function is
* called at the end of a `safeTransferFrom` after the balance has been updated.
*
* NOTE: To accept the transfer, this must return
* `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
* (i.e. 0xf23a6e61, or its own function selector).
*
* @param operator The address which initiated the transfer (i.e. msg.sender)
* @param from The address which previously owned the token
* @param id The ID of the token being transferred
* @param value The amount of tokens being transferred
* @param data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
) external returns (bytes4);
/**
* @dev Handles the receipt of a multiple ERC1155 token types. This function
* is called at the end of a `safeBatchTransferFrom` after the balances have
* been updated.
*
* NOTE: To accept the transfer(s), this must return
* `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
* (i.e. 0xbc197c81, or its own function selector).
*
* @param operator The address which initiated the batch transfer (i.e. msg.sender)
* @param from The address which previously owned the token
* @param ids An array containing ids of each token being transferred (order and length must match values array)
* @param values An array containing amounts of each token being transferred (order and length must match ids array)
* @param data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
) external returns (bytes4);
}
