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Latest 13 from a total of 13 transactions
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Withdraw Payment... | 16229224 | 609 days ago | IN | 0 ETH | 0.00052118 | ||||
Transfer ETH To ... | 16229219 | 609 days ago | IN | 0 ETH | 0.00082028 | ||||
Transfer NFT To ... | 16229214 | 609 days ago | IN | 0 ETH | 0.00103887 | ||||
Purchase Ticket | 16229192 | 609 days ago | IN | 0.02 ETH | 0.00287125 | ||||
Purchase Ticket | 16229086 | 609 days ago | IN | 0.01 ETH | 0.00117626 | ||||
Purchase Ticket | 16224136 | 610 days ago | IN | 0.01 ETH | 0.00205951 | ||||
Purchase Ticket | 16219153 | 611 days ago | IN | 0.01 ETH | 0.00253775 | ||||
Purchase Ticket | 16219102 | 611 days ago | IN | 0.01 ETH | 0.00173118 | ||||
Purchase Ticket | 16219003 | 611 days ago | IN | 0.01 ETH | 0.00328013 | ||||
Purchase Ticket | 16218859 | 611 days ago | IN | 0.01 ETH | 0.00212467 | ||||
Giveaway Ticket | 16218577 | 611 days ago | IN | 0 ETH | 0.00394841 | ||||
Purchase Ticket | 16218531 | 611 days ago | IN | 0.05 ETH | 0.00213579 | ||||
Verify NFT Prese... | 16018663 | 639 days ago | IN | 0 ETH | 0.00072508 |
Latest 3 internal transactions
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Parent Transaction Hash | Block | From | To | |||
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16229219 | 609 days ago | 0.12 ETH | ||||
16018574 | 639 days ago | Contract Creation | 0 ETH | |||
16018574 | 639 days ago | Contract Creation | 0 ETH |
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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0xc5F87160...58c571b27 The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
Raffle
Compiler Version
v0.8.9+commit.e5eed63a
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import "contracts/ICryptoPunk.sol"; import "contracts/TicketStorage.sol"; import "@chainlink/contracts/src/v0.8/interfaces/VRFCoordinatorV2Interface.sol"; import "@chainlink/contracts/src/v0.8/VRFConsumerBaseV2.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC1155/utils/ERC1155Holder.sol"; import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol"; import "@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/security/PullPayment.sol"; /** * @dev This contract is used to represent BoredLucky raffle. It supports CryptoPunks, ERC721 and ERC1155 NFTs. * * Raffle relies on Chainlink VRF to draw the winner. * * Raffle ensures that buyers will get a fair chance of winning (proportional to the number of purchased tickets), or * a way to get ETH back if raffle gets cancelled. * * Raffle can start only after the correct NFT is transferred to the account. * * Each raffle has an `owner`, the admin account that has the following abilities: * - gets ETH after the raffle is completed * - gets back the NFT if raffle is cancelled * - able to giveaway tickets * - able to cancel raffle before it has started (e.g. created with wrong parameters) * * Raffle gets cancelled if: * - not all tickets are sold before `endTimestamp` * - `owner` cancels it before start * - for some reason we do not have response from Chainlink VRF for one day after we request random number * * In any scenario, raffle cannot get stuck and users have a fair chance to win or get ETH back. * * `PullPayments` are used where possible to increase security. * * The lifecycle of raffle consist of following states: * - WaitingForNFT: after raffle is created, it waits for * - WaitingForStart: correct NFT is transferred and we wait for `startTimestamp` * - SellingTickets: it possible to purchase tickets * - WaitingForRNG: all tickets are sold, we wait for Chainlink VRF to send random number * - Completed (terminal) -- we know the winner, it can get NFT, raffle owner can get ETH * - Cancelled (terminal) -- raffle cancelled, buyers can get back their ETH, owner can get NFT */ contract Raffle is Ownable, TicketStorage, ERC1155Holder, ERC721Holder, PullPayment, VRFConsumerBaseV2 { event WinnerDrawn(uint16 ticketNumber, address owner); enum State { WaitingForNFT, WaitingForStart, SellingTickets, WaitingForRNG, Completed, Cancelled } State private _state; address public immutable nftContract; uint256 public immutable nftTokenId; enum NFTStandard { CryptoPunks, ERC721, ERC1155 } NFTStandard public immutable nftStandard; uint256 public immutable ticketPrice; uint256 public immutable startTimestamp; uint256 public immutable endTimestamp; uint16 private _soldTickets; uint16 private _giveawayTickets; mapping(address => uint16) private _addressToPurchasedCountMap; uint256 private _cancelTimestamp; uint256 private _transferNFTToWinnerTimestamp; uint256 private _winnerDrawTimestamp; uint16 private _winnerTicketNumber; address private _winnerAddress; VRFCoordinatorV2Interface immutable VRF_COORDINATOR; uint64 immutable vrfSubscriptionId; bytes32 immutable vrfKeyHash; uint256[] public vrfRandomWords; uint256 public vrfRequestId; uint32 constant VRF_CALLBACK_GAS_LIMIT = 300_000; uint16 constant VRF_REQUEST_CONFIRMATIONS = 20; uint16 constant VRF_NUM_WORDS = 1; constructor( address _nftContract, uint256 _nftTokenId, uint256 _nftStandardId, uint16 _tickets, uint256 _ticketPrice, uint256 _startTimestamp, uint256 _endTimestamp, uint64 _vrfSubscriptionId, address _vrfCoordinator, bytes32 _vrfKeyHash ) TicketStorage(_tickets) VRFConsumerBaseV2(_vrfCoordinator) { require(block.timestamp < _startTimestamp, "Start timestamp cannot be in the past"); require(_endTimestamp > _startTimestamp, "End timestamp must be after start timestamp"); require(_nftContract != address(0), "NFT contract cannot be 0x0"); nftStandard = NFTStandard(_nftStandardId); require( nftStandard == NFTStandard.CryptoPunks || nftStandard == NFTStandard.ERC721 || nftStandard == NFTStandard.ERC1155, "Not supported NFT standard" ); nftContract = _nftContract; nftTokenId = _nftTokenId; ticketPrice = _ticketPrice; startTimestamp = _startTimestamp; endTimestamp = _endTimestamp; VRF_COORDINATOR = VRFCoordinatorV2Interface(_vrfCoordinator); vrfKeyHash = _vrfKeyHash; vrfSubscriptionId = _vrfSubscriptionId; _state = State.WaitingForNFT; } /** * @dev Purchases raffle tickets. * * If last ticket is sold, triggers {_requestRandomWords} to request random number from Chainlink VRF. * * Requirements: * - must be in SellingTickets state * - cannot purchase after `endTimestamp` * - cannot purchase 0 tickets * - must have correct `value` of ETH */ function purchaseTicket(uint16 count) external payable { if (_state == State.WaitingForStart) { if (block.timestamp > startTimestamp && block.timestamp < endTimestamp) { _state = State.SellingTickets; } } require(_state == State.SellingTickets, "Must be in SellingTickets"); require(block.timestamp < endTimestamp, "End timestamp must be in the future"); require(count > 0, "Ticket count must be more than 0"); require(msg.value == ticketPrice * count, "Incorrect purchase amount (must be ticketPrice * count)"); _assignTickets(msg.sender, count); _soldTickets += count; assert(_tickets == _ticketsLeft + _soldTickets + _giveawayTickets); _addressToPurchasedCountMap[msg.sender] += count; if (_ticketsLeft == 0) { _state = State.WaitingForRNG; _requestRandomWords(); } } struct AddressAndCount { address receiverAddress; uint16 count; } /** * @dev Giveaway tickets. `owner` of raffle can giveaway free tickets, used for promotion. * * It is possible to giveaway tickets before start, ensuring that promised tickets for promotions can be assigned, * otherwise if raffle is quickly sold out, we may not able to do it in time. * * If last ticket is given out, triggers {_requestRandomWords} to request random number from Chainlink VRF. * * Requirements: * - must be in WaitingForStart or SellingTickets state * - cannot giveaway after `endTimestamp` */ function giveawayTicket(AddressAndCount[] memory receivers) external onlyOwner { require( _state == State.WaitingForStart || _state == State.SellingTickets, "Must be in WaitingForStart or SellingTickets" ); if (_state == State.WaitingForStart) { if (block.timestamp > startTimestamp && block.timestamp < endTimestamp) { _state = State.SellingTickets; } } require(block.timestamp < endTimestamp, "End timestamp must be in the future"); for (uint256 i = 0; i < receivers.length; i++) { AddressAndCount memory item = receivers[i]; _assignTickets(item.receiverAddress, item.count); _giveawayTickets += item.count; assert(_tickets == _ticketsLeft + _soldTickets + _giveawayTickets); } if (_ticketsLeft == 0) { _state = State.WaitingForRNG; _requestRandomWords(); } } /** * @dev After the correct NFT (specified in raffle constructor) is transferred to raffle contract, * this method must be invoked to verify it and move raffle into WaitingForStart state. * * Requirements: * - must be in WaitingForNFT state */ function verifyNFTPresenceBeforeStart() external { require(_state == State.WaitingForNFT, "Must be in WaitingForNFT"); if (nftStandard == NFTStandard.CryptoPunks) { if (ICryptoPunk(nftContract).punkIndexToAddress(nftTokenId) == address(this)) { _state = State.WaitingForStart; } } else if (nftStandard == NFTStandard.ERC721) { if (IERC721(nftContract).ownerOf(nftTokenId) == address(this)) { _state = State.WaitingForStart; } } else if (nftStandard == NFTStandard.ERC1155) { if (IERC1155(nftContract).balanceOf(address(this), nftTokenId) == 1) { _state = State.WaitingForStart; } } } /** * @dev Cancels raffle before it has started. * * Only raffle `owner` can do it and it is needed in case raffle was created incorrectly. * * Requirements: * - must be in WaitingForNFT or WaitingForStart state */ function cancelBeforeStart() external onlyOwner { require( _state == State.WaitingForNFT || _state == State.WaitingForStart, "Must be in WaitingForNFT or WaitingForStart" ); _state = State.Cancelled; _cancelTimestamp = block.timestamp; } /** * @dev Cancels raffle if not all tickets were sold. * * Anyone can call this method after `endTimestamp`. * * Requirements: * - must be in SellingTickets state */ function cancelIfUnsold() external { require( _state == State.WaitingForStart || _state == State.SellingTickets, "Must be in WaitingForStart or SellingTickets" ); require(block.timestamp > endTimestamp, "End timestamp must be in the past"); _state = State.Cancelled; _cancelTimestamp = block.timestamp; } /** * @dev Cancels raffle if there is no response from Chainlink VRF. * * Anyone can call this method after `endTimestamp` + 1 day. * * Requirements: * - must be in WaitingForRNG state */ function cancelIfNoRNG() external { require(_state == State.WaitingForRNG, "Must be in WaitingForRNG"); require(block.timestamp > endTimestamp + 1 days, "End timestamp + 1 day must be in the past"); _state = State.Cancelled; _cancelTimestamp = block.timestamp; } /** * @dev Transfers purchased ticket refund into internal escrow, after that user can claim ETH * using {PullPayment-withdrawPayments}. * * Requirements: * - must be in Cancelled state */ function transferTicketRefundIfCancelled() external { require(_state == State.Cancelled, "Must be in Cancelled"); uint256 refundAmount = _addressToPurchasedCountMap[msg.sender] * ticketPrice; if (refundAmount > 0) { _addressToPurchasedCountMap[msg.sender] = 0; _asyncTransfer(msg.sender, refundAmount); } } /** * @dev Transfers specified NFT to raffle `owner`. This method is used to recover NFT (including other NFTs, * that could have been transferred to raffle by mistake) if raffle gets cancelled. * * Requirements: * - must be in Cancelled state */ function transferNFTToOwnerIfCancelled(NFTStandard nftStandard, address contractAddress, uint256 tokenId) external { require(_state == State.Cancelled, "Must be in Cancelled"); if (nftStandard == NFTStandard.CryptoPunks) { ICryptoPunk(contractAddress).transferPunk(address(owner()), tokenId); } else if (nftStandard == NFTStandard.ERC721) { IERC721(contractAddress).safeTransferFrom(address(this), owner(), tokenId); } else if (nftStandard == NFTStandard.ERC1155) { IERC1155(contractAddress).safeTransferFrom(address(this), owner(), tokenId, 1, ""); } } /** * @dev Transfers raffle NFT to `_winnerAddress` after the raffle has completed. * * Requirements: * - must be in Completed state */ function transferNFTToWinnerIfCompleted() external { require(_state == State.Completed, "Must be in Completed"); assert(_winnerAddress != address(0)); _transferNFTToWinnerTimestamp = block.timestamp; if (nftStandard == NFTStandard.CryptoPunks) { ICryptoPunk(nftContract).transferPunk(_winnerAddress, nftTokenId); } else if (nftStandard == NFTStandard.ERC721) { IERC721(nftContract).safeTransferFrom(address(this), _winnerAddress, nftTokenId); } else if (nftStandard == NFTStandard.ERC1155) { IERC1155(nftContract).safeTransferFrom(address(this), _winnerAddress, nftTokenId, 1, ""); } } /** * @dev Transfers raffle ETHinto internal escrow, after that raffle `owner` can claim it * using {PullPayment-withdrawPayments}. * * Requirements: * - must be in Completed state */ function transferETHToOwnerIfCompleted() external { require(_state == State.Completed, "Must be in Completed"); _asyncTransfer(owner(), address(this).balance); } /** * @dev Returns the number of purchased tickets for given `owner`. */ function getPurchasedTicketCount(address owner) public view returns (uint16) { return _addressToPurchasedCountMap[owner]; } /** * @dev Returns raffle state. * * If `Completed`, it is possible to use {getWinnerAddress}, {getWinnerDrawTimestamp} and {getWinnerTicketNumber}. */ function getState() public view returns (State) { return _state; } function getCancelTimestamp() public view returns (uint256) { return _cancelTimestamp; } function getTransferNFTToWinnerTimestamp() public view returns (uint256) { return _transferNFTToWinnerTimestamp; } function getWinnerAddress() public view returns (address) { return _winnerAddress; } function getWinnerDrawTimestamp() public view returns (uint256) { return _winnerDrawTimestamp; } function getWinnerTicketNumber() public view returns (uint16) { return _winnerTicketNumber; } /** * @dev Chainlink VRF callback function. * * Returned `randomWords` are stored in `vrfRandomWords`, we determine winner and store all relevant information in * `_winnerTicketNumber`, `_winnerDrawTimestamp` and `_winnerAddress`. * * Requirements: * - must have correct `requestId` * - must be in WaitingForRNG state * * Emits a {WinnerDrawn} event. */ function fulfillRandomWords(uint256 requestId, uint256[] memory randomWords) internal override { require(vrfRequestId == requestId, "Unexpected VRF request id"); require(_state == State.WaitingForRNG, "Must be in WaitingForRNG"); vrfRandomWords = randomWords; _winnerTicketNumber = uint16(randomWords[0] % _tickets); _winnerDrawTimestamp = block.timestamp; _winnerAddress = findOwnerOfTicketNumber(_winnerTicketNumber); _state = State.Completed; emit WinnerDrawn(_winnerTicketNumber, _winnerAddress); } /** * @dev Requests random number from Chainlink VRF. Called when last ticked is sold or given out. * * Requirements: * - must be in WaitingForRNG state */ function _requestRandomWords() private { require(_state == State.WaitingForRNG, "Must be in WaitingForRNG"); vrfRequestId = VRF_COORDINATOR.requestRandomWords( vrfKeyHash, vrfSubscriptionId, VRF_REQUEST_CONFIRMATIONS, VRF_CALLBACK_GAS_LIMIT, VRF_NUM_WORDS ); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; /** * @dev This contract is used to represent `CryptoPunksMarket` and interact with CryptoPunk NFTs. */ interface ICryptoPunk { function punkIndexToAddress(uint256 punkIndex) external view returns (address); function transferPunk(address to, uint256 punkIndex) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.9; import "@openzeppelin/contracts/access/Ownable.sol"; /** * @dev This contract is used to store numbered ticket ranges and their owners. * * Ticket range is represented using {TicketNumberRange}, a struct of `owner, `from` and `to`. If account `0x1` buys * first ticket, then we store it as `(0x1, 0, 0)`, if then account `0x2` buys ten tickets, then we store next record as * `(0x2, 1, 10)`. If after that third account `0x3` buys ten tickets, we store it as `(0x3, 11, 20)`. And so on. * * Storing ticket numbers in such way allows compact representation of accounts who buy a lot of tickets at once. * * We set 25000 as limit of how many tickets we can support. */ abstract contract TicketStorage { event TicketsAssigned(TicketNumberRange ticketNumberRange, uint16 ticketsLeft); struct TicketNumberRange { address owner; uint16 from; uint16 to; } uint16 internal immutable _tickets; uint16 internal _ticketsLeft; TicketNumberRange[] private _ticketNumberRanges; mapping(address => uint16) private _addressToAssignedCountMap; mapping(address => uint16[]) private _addressToAssignedTicketNumberRangesMap; constructor(uint16 tickets) { require(tickets > 0, "Number of tickets must be greater than 0"); require(tickets <= 25_000, "Number of tickets cannot exceed 25_000"); _tickets = tickets; _ticketsLeft = tickets; } /** * @dev Returns total amount of tickets. */ function getTickets() public view returns (uint16) { return _tickets; } /** * @dev Returns amount of unassigned tickets. */ function getTicketsLeft() public view returns (uint16) { return _ticketsLeft; } /** * @dev Returns {TicketNumberRange} for given `index`. */ function getTicketNumberRange(uint16 index) public view returns (TicketNumberRange memory) { return _ticketNumberRanges[index]; } /** * @dev Returns how many tickets are assigned to given `owner`. */ function getAssignedTicketCount(address owner) public view returns (uint16) { return _addressToAssignedCountMap[owner]; } /** * @dev Returns the index of {TicketNumberRange} in `_ticketNumberRanges` that is assigned to `owner`. * * For example, if `owner` purchased tickets three times ({getAssignedTicketNumberRanges} will return `3`), * we can use this method with `index` of 0, 1 and 2, to get indexes of {TicketNumberRange} in `_ticketNumberRanges`. */ function getAssignedTicketNumberRange(address owner, uint16 index) public view returns (uint16) { return _addressToAssignedTicketNumberRangesMap[owner][index]; } /** * @dev Returns how many {TicketNumberRange} are assigned for given `owner`. * * Can be used in combination with {getAssignedTicketNumberRange} and {getTicketNumberRange} to show * all actual ticket numbers that are assigned to the `owner`. */ function getAssignedTicketNumberRanges(address owner) public view returns (uint16) { return uint16(_addressToAssignedTicketNumberRangesMap[owner].length); } /** * @dev Assigns `count` amount of tickets to `owner` address. * * Requirements: * - there must be enough tickets left * * Emits a {TicketsAssigned} event. */ function _assignTickets(address owner, uint16 count) internal { require(_ticketsLeft > 0, "All tickets are assigned"); require(_ticketsLeft >= count, "Assigning too many tickets at once"); uint16 from = _tickets - _ticketsLeft; _ticketsLeft -= count; TicketNumberRange memory ticketNumberRange = TicketNumberRange({ owner: owner, from: from, to: from + count - 1 }); _ticketNumberRanges.push(ticketNumberRange); _addressToAssignedCountMap[owner] += count; _addressToAssignedTicketNumberRangesMap[owner].push(uint16(_ticketNumberRanges.length - 1)); assert(_ticketNumberRanges[_ticketNumberRanges.length - 1].to == _tickets - _ticketsLeft - 1); emit TicketsAssigned(ticketNumberRange, _ticketsLeft); } /** * @dev Returns address of the `owner` of given ticket number. * * Uses binary search on `_ticketNumberRanges` to find it. * * Requirements: * - all tickets must be assigned */ function findOwnerOfTicketNumber(uint16 ticketNumber) public view returns (address) { require(ticketNumber < _tickets, "Ticket number does not exist"); require(_ticketsLeft == 0, "Not all tickets are assigned"); uint16 ticketNumberRangesLength = uint16(_ticketNumberRanges.length); assert(_ticketNumberRanges[0].from == 0); assert(_ticketNumberRanges[ticketNumberRangesLength - 1].to == _tickets - 1); uint16 left = 0; uint16 right = ticketNumberRangesLength - 1; uint16 pivot = (left + right) / 2; address ownerAddress = address(0); while (ownerAddress == address(0)) { pivot = (left + right) / 2; TicketNumberRange memory ticketNumberRange = _ticketNumberRanges[pivot]; if (ticketNumberRange.to < ticketNumber) { left = pivot + 1; } else if (ticketNumberRange.from > ticketNumber) { right = pivot - 1; } else { ownerAddress = ticketNumberRange.owner; } } return ownerAddress; } }
// 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 ^0.8.4; /** **************************************************************************** * @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 // OpenZeppelin Contracts (last updated v4.7.0) (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 anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// 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 v4.7.0) (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 v4.4.1 (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 v4.7.0) (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: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev 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 v4.7.0) (security/PullPayment.sol) pragma solidity ^0.8.0; import "../utils/escrow/Escrow.sol"; /** * @dev Simple implementation of a * https://consensys.github.io/smart-contract-best-practices/recommendations/#favor-pull-over-push-for-external-calls[pull-payment] * strategy, where the paying contract doesn't interact directly with the * receiver account, which must withdraw its payments itself. * * Pull-payments are often considered the best practice when it comes to sending * Ether, security-wise. It prevents recipients from blocking execution, and * eliminates reentrancy concerns. * * 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]. * * To use, derive from the `PullPayment` contract, and use {_asyncTransfer} * instead of Solidity's `transfer` function. Payees can query their due * payments with {payments}, and retrieve them with {withdrawPayments}. */ abstract contract PullPayment { Escrow private immutable _escrow; constructor() { _escrow = new Escrow(); } /** * @dev Withdraw accumulated payments, forwarding all gas to the recipient. * * Note that _any_ account can call this function, not just the `payee`. * This means that contracts unaware of the `PullPayment` protocol can still * receive funds this way, by having a separate account call * {withdrawPayments}. * * WARNING: Forwarding all gas opens the door to reentrancy vulnerabilities. * Make sure you trust the recipient, or are either following the * checks-effects-interactions pattern or using {ReentrancyGuard}. * * @param payee Whose payments will be withdrawn. * * Causes the `escrow` to emit a {Withdrawn} event. */ function withdrawPayments(address payable payee) public virtual { _escrow.withdraw(payee); } /** * @dev Returns the payments owed to an address. * @param dest The creditor's address. */ function payments(address dest) public view returns (uint256) { return _escrow.depositsOf(dest); } /** * @dev Called by the payer to store the sent amount as credit to be pulled. * Funds sent in this way are stored in an intermediate {Escrow} contract, so * there is no danger of them being spent before withdrawal. * * @param dest The destination address of the funds. * @param amount The amount to transfer. * * Causes the `escrow` to emit a {Deposited} event. */ function _asyncTransfer(address dest, uint256 amount) internal virtual { _escrow.deposit{value: amount}(dest); } }
// 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 (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 (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); }
// 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 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 (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 (last updated v4.7.0) (utils/escrow/Escrow.sol) pragma solidity ^0.8.0; import "../../access/Ownable.sol"; import "../Address.sol"; /** * @title Escrow * @dev Base escrow contract, holds funds designated for a payee until they * withdraw them. * * Intended usage: This contract (and derived escrow contracts) should be a * standalone contract, that only interacts with the contract that instantiated * it. That way, it is guaranteed that all Ether will be handled according to * the `Escrow` rules, and there is no need to check for payable functions or * transfers in the inheritance tree. The contract that uses the escrow as its * payment method should be its owner, and provide public methods redirecting * to the escrow's deposit and withdraw. */ contract Escrow is Ownable { using Address for address payable; event Deposited(address indexed payee, uint256 weiAmount); event Withdrawn(address indexed payee, uint256 weiAmount); mapping(address => uint256) private _deposits; function depositsOf(address payee) public view returns (uint256) { return _deposits[payee]; } /** * @dev Stores the sent amount as credit to be withdrawn. * @param payee The destination address of the funds. * * Emits a {Deposited} event. */ function deposit(address payee) public payable virtual onlyOwner { uint256 amount = msg.value; _deposits[payee] += amount; emit Deposited(payee, amount); } /** * @dev Withdraw accumulated balance for a payee, forwarding all gas to the * recipient. * * WARNING: Forwarding all gas opens the door to reentrancy vulnerabilities. * Make sure you trust the recipient, or are either following the * checks-effects-interactions pattern or using {ReentrancyGuard}. * * @param payee The address whose funds will be withdrawn and transferred to. * * Emits a {Withdrawn} event. */ function withdraw(address payable payee) public virtual onlyOwner { uint256 payment = _deposits[payee]; _deposits[payee] = 0; payee.sendValue(payment); emit Withdrawn(payee, payment); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"address","name":"_nftContract","type":"address"},{"internalType":"uint256","name":"_nftTokenId","type":"uint256"},{"internalType":"uint256","name":"_nftStandardId","type":"uint256"},{"internalType":"uint16","name":"_tickets","type":"uint16"},{"internalType":"uint256","name":"_ticketPrice","type":"uint256"},{"internalType":"uint256","name":"_startTimestamp","type":"uint256"},{"internalType":"uint256","name":"_endTimestamp","type":"uint256"},{"internalType":"uint64","name":"_vrfSubscriptionId","type":"uint64"},{"internalType":"address","name":"_vrfCoordinator","type":"address"},{"internalType":"bytes32","name":"_vrfKeyHash","type":"bytes32"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"have","type":"address"},{"internalType":"address","name":"want","type":"address"}],"name":"OnlyCoordinatorCanFulfill","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"components":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint16","name":"from","type":"uint16"},{"internalType":"uint16","name":"to","type":"uint16"}],"indexed":false,"internalType":"struct TicketStorage.TicketNumberRange","name":"ticketNumberRange","type":"tuple"},{"indexed":false,"internalType":"uint16","name":"ticketsLeft","type":"uint16"}],"name":"TicketsAssigned","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint16","name":"ticketNumber","type":"uint16"},{"indexed":false,"internalType":"address","name":"owner","type":"address"}],"name":"WinnerDrawn","type":"event"},{"inputs":[],"name":"cancelBeforeStart","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"cancelIfNoRNG","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"cancelIfUnsold","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"endTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"ticketNumber","type":"uint16"}],"name":"findOwnerOfTicketNumber","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"getAssignedTicketCount","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint16","name":"index","type":"uint16"}],"name":"getAssignedTicketNumberRange","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"getAssignedTicketNumberRanges","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCancelTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"getPurchasedTicketCount","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getState","outputs":[{"internalType":"enum Raffle.State","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"index","type":"uint16"}],"name":"getTicketNumberRange","outputs":[{"components":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint16","name":"from","type":"uint16"},{"internalType":"uint16","name":"to","type":"uint16"}],"internalType":"struct TicketStorage.TicketNumberRange","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTickets","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTicketsLeft","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTransferNFTToWinnerTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getWinnerAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getWinnerDrawTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getWinnerTicketNumber","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"receiverAddress","type":"address"},{"internalType":"uint16","name":"count","type":"uint16"}],"internalType":"struct Raffle.AddressAndCount[]","name":"receivers","type":"tuple[]"}],"name":"giveawayTicket","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"nftContract","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nftStandard","outputs":[{"internalType":"enum Raffle.NFTStandard","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nftTokenId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256[]","name":"","type":"uint256[]"},{"internalType":"uint256[]","name":"","type":"uint256[]"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onERC1155BatchReceived","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onERC1155Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"dest","type":"address"}],"name":"payments","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"count","type":"uint16"}],"name":"purchaseTicket","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"requestId","type":"uint256"},{"internalType":"uint256[]","name":"randomWords","type":"uint256[]"}],"name":"rawFulfillRandomWords","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"startTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ticketPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"transferETHToOwnerIfCompleted","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"enum Raffle.NFTStandard","name":"nftStandard","type":"uint8"},{"internalType":"address","name":"contractAddress","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferNFTToOwnerIfCancelled","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"transferNFTToWinnerIfCompleted","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"transferTicketRefundIfCancelled","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"verifyNFTPresenceBeforeStart","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"vrfRandomWords","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"vrfRequestId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address payable","name":"payee","type":"address"}],"name":"withdrawPayments","outputs":[],"stateMutability":"nonpayable","type":"function"}]
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.