Contract 0xd5d517abe5cf79b7e95ec98db0f0277788aff634 6

// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

import "../interfaces/LinkTokenInterface.sol";
import "../interfaces/BlockhashStoreInterface.sol";
import "../interfaces/AggregatorV3Interface.sol";
import "../interfaces/VRFCoordinatorV2Interface.sol";
import "../interfaces/TypeAndVersionInterface.sol";
import "../interfaces/ERC677ReceiverInterface.sol";
import "./VRF.sol";
import "../ConfirmedOwner.sol";
import "../VRFConsumerBaseV2.sol";

contract VRFCoordinatorV2 is
  VRF,
  ConfirmedOwner,
  TypeAndVersionInterface,
  VRFCoordinatorV2Interface,
  ERC677ReceiverInterface
{
  LinkTokenInterface public immutable LINK;
  AggregatorV3Interface public immutable LINK_ETH_FEED;
  BlockhashStoreInterface public immutable BLOCKHASH_STORE;

  // We need to maintain a list of consuming addresses.
  // This bound ensures we are able to loop over them as needed.
  // Should a user require more consumers, they can use multiple subscriptions.
  uint16 public constant MAX_CONSUMERS = 100;
  error TooManyConsumers();
  error InsufficientBalance();
  error InvalidConsumer(uint64 subId, address consumer);
  error InvalidSubscription();
  error OnlyCallableFromLink();
  error InvalidCalldata();
  error MustBeSubOwner(address owner);
  error PendingRequestExists();
  error MustBeRequestedOwner(address proposedOwner);
  error BalanceInvariantViolated(uint256 internalBalance, uint256 externalBalance); // Should never happen
  event FundsRecovered(address to, uint256 amount);
  // We use the subscription struct (1 word)
  // at fulfillment time.
  struct Subscription {
    // There are only 1e9*1e18 = 1e27 juels in existence, so the balance can fit in uint96 (2^96 ~ 7e28)
    uint96 balance; // Common link balance used for all consumer requests.
    uint64 reqCount; // For fee tiers
  }
  // We use the config for the mgmt APIs
  struct SubscriptionConfig {
    address owner; // Owner can fund/withdraw/cancel the sub.
    address requestedOwner; // For safely transferring sub ownership.
    // Maintains the list of keys in s_consumers.
    // We do this for 2 reasons:
    // 1. To be able to clean up all keys from s_consumers when canceling a subscription.
    // 2. To be able to return the list of all consumers in getSubscription.
    // Note that we need the s_consumers map to be able to directly check if a
    // consumer is valid without reading all the consumers from storage.
    address[] consumers;
  }
  // Note a nonce of 0 indicates an the consumer is not assigned to that subscription.
  mapping(address => mapping(uint64 => uint64)) /* consumer */ /* subId */ /* nonce */
    private s_consumers;
  mapping(uint64 => SubscriptionConfig) /* subId */ /* subscriptionConfig */
    private s_subscriptionConfigs;
  mapping(uint64 => Subscription) /* subId */ /* subscription */
    private s_subscriptions;
  // We make the sub count public so that its possible to
  // get all the current subscriptions via getSubscription.
  uint64 private s_currentSubId;
  // s_totalBalance tracks the total link sent to/from
  // this contract through onTokenTransfer, cancelSubscription and oracleWithdraw.
  // A discrepancy with this contract's link balance indicates someone
  // sent tokens using transfer and so we may need to use recoverFunds.
  uint96 private s_totalBalance;
  event SubscriptionCreated(uint64 indexed subId, address owner);
  event SubscriptionFunded(uint64 indexed subId, uint256 oldBalance, uint256 newBalance);
  event SubscriptionConsumerAdded(uint64 indexed subId, address consumer);
  event SubscriptionConsumerRemoved(uint64 indexed subId, address consumer);
  event SubscriptionCanceled(uint64 indexed subId, address to, uint256 amount);
  event SubscriptionOwnerTransferRequested(uint64 indexed subId, address from, address to);
  event SubscriptionOwnerTransferred(uint64 indexed subId, address from, address to);

  // Set this maximum to 200 to give us a 56 block window to fulfill
  // the request before requiring the block hash feeder.
  uint16 public constant MAX_REQUEST_CONFIRMATIONS = 200;
  uint32 public constant MAX_NUM_WORDS = 500;
  // 5k is plenty for an EXTCODESIZE call (2600) + warm CALL (100)
  // and some arithmetic operations.
  uint256 private constant GAS_FOR_CALL_EXACT_CHECK = 5_000;
  error InvalidRequestConfirmations(uint16 have, uint16 min, uint16 max);
  error GasLimitTooBig(uint32 have, uint32 want);
  error NumWordsTooBig(uint32 have, uint32 want);
  error ProvingKeyAlreadyRegistered(bytes32 keyHash);
  error NoSuchProvingKey(bytes32 keyHash);
  error InvalidLinkWeiPrice(int256 linkWei);
  error InsufficientGasForConsumer(uint256 have, uint256 want);
  error NoCorrespondingRequest();
  error IncorrectCommitment();
  error BlockhashNotInStore(uint256 blockNum);
  error PaymentTooLarge();
  error Reentrant();
  struct RequestCommitment {
    uint64 blockNum;
    uint64 subId;
    uint32 callbackGasLimit;
    uint32 numWords;
    address sender;
  }
  mapping(bytes32 => address) /* keyHash */ /* oracle */
    private s_provingKeys;
  bytes32[] private s_provingKeyHashes;
  mapping(address => uint96) /* oracle */ /* LINK balance */
    private s_withdrawableTokens;
  mapping(uint256 => bytes32) /* requestID */ /* commitment */
    private s_requestCommitments;
  event ProvingKeyRegistered(bytes32 keyHash, address indexed oracle);
  event ProvingKeyDeregistered(bytes32 keyHash, address indexed oracle);
  event RandomWordsRequested(
    bytes32 indexed keyHash,
    uint256 requestId,
    uint256 preSeed,
    uint64 indexed subId,
    uint16 minimumRequestConfirmations,
    uint32 callbackGasLimit,
    uint32 numWords,
    address indexed sender
  );
  event RandomWordsFulfilled(uint256 indexed requestId, uint256 outputSeed, uint96 payment, bool success);

  struct Config {
    uint16 minimumRequestConfirmations;
    uint32 maxGasLimit;
    // Reentrancy protection.
    bool reentrancyLock;
    // stalenessSeconds is how long before we consider the feed price to be stale
    // and fallback to fallbackWeiPerUnitLink.
    uint32 stalenessSeconds;
    // Gas to cover oracle payment after we calculate the payment.
    // We make it configurable in case those operations are repriced.
    uint32 gasAfterPaymentCalculation;
  }
  int256 private s_fallbackWeiPerUnitLink;
  Config private s_config;
  FeeConfig private s_feeConfig;
  struct FeeConfig {
    // Flat fee charged per fulfillment in millionths of link
    // So fee range is [0, 2^32/10^6].
    uint32 fulfillmentFlatFeeLinkPPMTier1;
    uint32 fulfillmentFlatFeeLinkPPMTier2;
    uint32 fulfillmentFlatFeeLinkPPMTier3;
    uint32 fulfillmentFlatFeeLinkPPMTier4;
    uint32 fulfillmentFlatFeeLinkPPMTier5;
    uint24 reqsForTier2;
    uint24 reqsForTier3;
    uint24 reqsForTier4;
    uint24 reqsForTier5;
  }
  event ConfigSet(
    uint16 minimumRequestConfirmations,
    uint32 maxGasLimit,
    uint32 stalenessSeconds,
    uint32 gasAfterPaymentCalculation,
    int256 fallbackWeiPerUnitLink,
    FeeConfig feeConfig
  );

  constructor(
    address link,
    address blockhashStore,
    address linkEthFeed
  ) ConfirmedOwner(msg.sender) {
    LINK = LinkTokenInterface(link);
    LINK_ETH_FEED = AggregatorV3Interface(linkEthFeed);
    BLOCKHASH_STORE = BlockhashStoreInterface(blockhashStore);
  }

  /**
   * @notice Registers a proving key to an oracle.
   * @param oracle address of the oracle
   * @param publicProvingKey key that oracle can use to submit vrf fulfillments
   */
  function registerProvingKey(address oracle, uint256[2] calldata publicProvingKey) external onlyOwner {
    bytes32 kh = hashOfKey(publicProvingKey);
    if (s_provingKeys[kh] != address(0)) {
      revert ProvingKeyAlreadyRegistered(kh);
    }
    s_provingKeys[kh] = oracle;
    s_provingKeyHashes.push(kh);
    emit ProvingKeyRegistered(kh, oracle);
  }

  /**
   * @notice Deregisters a proving key to an oracle.
   * @param publicProvingKey key that oracle can use to submit vrf fulfillments
   */
  function deregisterProvingKey(uint256[2] calldata publicProvingKey) external onlyOwner {
    bytes32 kh = hashOfKey(publicProvingKey);
    address oracle = s_provingKeys[kh];
    if (oracle == address(0)) {
      revert NoSuchProvingKey(kh);
    }
    delete s_provingKeys[kh];
    for (uint256 i = 0; i < s_provingKeyHashes.length; i++) {
      if (s_provingKeyHashes[i] == kh) {
        bytes32 last = s_provingKeyHashes[s_provingKeyHashes.length - 1];
        // Copy last element and overwrite kh to be deleted with it
        s_provingKeyHashes[i] = last;
        s_provingKeyHashes.pop();
      }
    }
    emit ProvingKeyDeregistered(kh, oracle);
  }

  /**
   * @notice Returns the proving key hash key associated with this public key
   * @param publicKey the key to return the hash of
   */
  function hashOfKey(uint256[2] memory publicKey) public pure returns (bytes32) {
    return keccak256(abi.encode(publicKey));
  }

  /**
   * @notice Sets the configuration of the vrfv2 coordinator
   * @param minimumRequestConfirmations global min for request confirmations
   * @param maxGasLimit global max for request gas limit
   * @param stalenessSeconds if the eth/link feed is more stale then this, use the fallback price
   * @param gasAfterPaymentCalculation gas used in doing accounting after completing the gas measurement
   * @param fallbackWeiPerUnitLink fallback eth/link price in the case of a stale feed
   * @param feeConfig fee tier configuration
   */
  function setConfig(
    uint16 minimumRequestConfirmations,
    uint32 maxGasLimit,
    uint32 stalenessSeconds,
    uint32 gasAfterPaymentCalculation,
    int256 fallbackWeiPerUnitLink,
    FeeConfig memory feeConfig
  ) external onlyOwner {
    if (minimumRequestConfirmations > MAX_REQUEST_CONFIRMATIONS) {
      revert InvalidRequestConfirmations(
        minimumRequestConfirmations,
        minimumRequestConfirmations,
        MAX_REQUEST_CONFIRMATIONS
      );
    }
    if (fallbackWeiPerUnitLink <= 0) {
      revert InvalidLinkWeiPrice(fallbackWeiPerUnitLink);
    }
    s_config = Config({
      minimumRequestConfirmations: minimumRequestConfirmations,
      maxGasLimit: maxGasLimit,
      stalenessSeconds: stalenessSeconds,
      gasAfterPaymentCalculation: gasAfterPaymentCalculation,
      reentrancyLock: false
    });
    s_feeConfig = feeConfig;
    s_fallbackWeiPerUnitLink = fallbackWeiPerUnitLink;
    emit ConfigSet(
      minimumRequestConfirmations,
      maxGasLimit,
      stalenessSeconds,
      gasAfterPaymentCalculation,
      fallbackWeiPerUnitLink,
      s_feeConfig
    );
  }

  function getConfig()
    external
    view
    returns (
      uint16 minimumRequestConfirmations,
      uint32 maxGasLimit,
      uint32 stalenessSeconds,
      uint32 gasAfterPaymentCalculation
    )
  {
    return (
      s_config.minimumRequestConfirmations,
      s_config.maxGasLimit,
      s_config.stalenessSeconds,
      s_config.gasAfterPaymentCalculation
    );
  }

  function getFeeConfig()
    external
    view
    returns (
      uint32 fulfillmentFlatFeeLinkPPMTier1,
      uint32 fulfillmentFlatFeeLinkPPMTier2,
      uint32 fulfillmentFlatFeeLinkPPMTier3,
      uint32 fulfillmentFlatFeeLinkPPMTier4,
      uint32 fulfillmentFlatFeeLinkPPMTier5,
      uint24 reqsForTier2,
      uint24 reqsForTier3,
      uint24 reqsForTier4,
      uint24 reqsForTier5
    )
  {
    return (
      s_feeConfig.fulfillmentFlatFeeLinkPPMTier1,
      s_feeConfig.fulfillmentFlatFeeLinkPPMTier2,
      s_feeConfig.fulfillmentFlatFeeLinkPPMTier3,
      s_feeConfig.fulfillmentFlatFeeLinkPPMTier4,
      s_feeConfig.fulfillmentFlatFeeLinkPPMTier5,
      s_feeConfig.reqsForTier2,
      s_feeConfig.reqsForTier3,
      s_feeConfig.reqsForTier4,
      s_feeConfig.reqsForTier5
    );
  }

  function getTotalBalance() external view returns (uint256) {
    return s_totalBalance;
  }

  function getFallbackWeiPerUnitLink() external view returns (int256) {
    return s_fallbackWeiPerUnitLink;
  }

  /**
   * @notice Owner cancel subscription, sends remaining link directly to the subscription owner.
   * @param subId subscription id
   * @dev notably can be called even if there are pending requests, outstanding ones may fail onchain
   */
  function ownerCancelSubscription(uint64 subId) external onlyOwner {
    if (s_subscriptionConfigs[subId].owner == address(0)) {
      revert InvalidSubscription();
    }
    cancelSubscriptionHelper(subId, s_subscriptionConfigs[subId].owner);
  }

  /**
   * @notice Recover link sent with transfer instead of transferAndCall.
   * @param to address to send link to
   */
  function recoverFunds(address to) external onlyOwner {
    uint256 externalBalance = LINK.balanceOf(address(this));
    uint256 internalBalance = uint256(s_totalBalance);
    if (internalBalance > externalBalance) {
      revert BalanceInvariantViolated(internalBalance, externalBalance);
    }
    if (internalBalance < externalBalance) {
      uint256 amount = externalBalance - internalBalance;
      LINK.transfer(to, amount);
      emit FundsRecovered(to, amount);
    }
    // If the balances are equal, nothing to be done.
  }

  /**
   * @inheritdoc VRFCoordinatorV2Interface
   */
  function getRequestConfig()
    external
    view
    override
    returns (
      uint16,
      uint32,
      bytes32[] memory
    )
  {
    return (s_config.minimumRequestConfirmations, s_config.maxGasLimit, s_provingKeyHashes);
  }

  /**
   * @inheritdoc VRFCoordinatorV2Interface
   */
  function requestRandomWords(
    bytes32 keyHash,
    uint64 subId,
    uint16 requestConfirmations,
    uint32 callbackGasLimit,
    uint32 numWords
  ) external override nonReentrant returns (uint256) {
    // Input validation using the subscription storage.
    if (s_subscriptionConfigs[subId].owner == address(0)) {
      revert InvalidSubscription();
    }
    // Its important to ensure that the consumer is in fact who they say they
    // are, otherwise they could use someone else's subscription balance.
    // A nonce of 0 indicates consumer is not allocated to the sub.
    uint64 currentNonce = s_consumers[msg.sender][subId];
    if (currentNonce == 0) {
      revert InvalidConsumer(subId, msg.sender);
    }
    // Input validation using the config storage word.
    if (
      requestConfirmations < s_config.minimumRequestConfirmations || requestConfirmations > MAX_REQUEST_CONFIRMATIONS
    ) {
      revert InvalidRequestConfirmations(
        requestConfirmations,
        s_config.minimumRequestConfirmations,
        MAX_REQUEST_CONFIRMATIONS
      );
    }
    // No lower bound on the requested gas limit. A user could request 0
    // and they would simply be billed for the proof verification and wouldn't be
    // able to do anything with the random value.
    if (callbackGasLimit > s_config.maxGasLimit) {
      revert GasLimitTooBig(callbackGasLimit, s_config.maxGasLimit);
    }
    if (numWords > MAX_NUM_WORDS) {
      revert NumWordsTooBig(numWords, MAX_NUM_WORDS);
    }
    // Note we do not check whether the keyHash is valid to save gas.
    // The consequence for users is that they can send requests
    // for invalid keyHashes which will simply not be fulfilled.
    uint64 nonce = currentNonce + 1;
    (uint256 requestId, uint256 preSeed) = computeRequestId(keyHash, msg.sender, subId, nonce);

    s_requestCommitments[requestId] = keccak256(
      abi.encode(requestId, block.number, subId, callbackGasLimit, numWords, msg.sender)
    );
    emit RandomWordsRequested(
      keyHash,
      requestId,
      preSeed,
      subId,
      requestConfirmations,
      callbackGasLimit,
      numWords,
      msg.sender
    );
    s_consumers[msg.sender][subId] = nonce;

    return requestId;
  }

  /**
   * @notice Get request commitment
   * @param requestId id of request
   * @dev used to determine if a request is fulfilled or not
   */
  function getCommitment(uint256 requestId) external view returns (bytes32) {
    return s_requestCommitments[requestId];
  }

  function computeRequestId(
    bytes32 keyHash,
    address sender,
    uint64 subId,
    uint64 nonce
  ) private pure returns (uint256, uint256) {
    uint256 preSeed = uint256(keccak256(abi.encode(keyHash, sender, subId, nonce)));
    return (uint256(keccak256(abi.encode(keyHash, preSeed))), preSeed);
  }

  /**
   * @dev calls target address with exactly gasAmount gas and data as calldata
   * or reverts if at least gasAmount gas is not available.
   */
  function callWithExactGas(
    uint256 gasAmount,
    address target,
    bytes memory data
  ) private returns (bool success) {
    // solhint-disable-next-line no-inline-assembly
    assembly {
      let g := gas()
      // Compute g -= GAS_FOR_CALL_EXACT_CHECK and check for underflow
      // The gas actually passed to the callee is min(gasAmount, 63//64*gas available).
      // We want to ensure that we revert if gasAmount >  63//64*gas available
      // as we do not want to provide them with less, however that check itself costs
      // gas.  GAS_FOR_CALL_EXACT_CHECK ensures we have at least enough gas to be able
      // to revert if gasAmount >  63//64*gas available.
      if lt(g, GAS_FOR_CALL_EXACT_CHECK) {
        revert(0, 0)
      }
      g := sub(g, GAS_FOR_CALL_EXACT_CHECK)
      // if g - g//64 <= gasAmount, revert
      // (we subtract g//64 because of EIP-150)
      if iszero(gt(sub(g, div(g, 64)), gasAmount)) {
        revert(0, 0)
      }
      // solidity calls check that a contract actually exists at the destination, so we do the same
      if iszero(extcodesize(target)) {
        revert(0, 0)
      }
      // call and return whether we succeeded. ignore return data
      // call(gas,addr,value,argsOffset,argsLength,retOffset,retLength)
      success := call(gasAmount, target, 0, add(data, 0x20), mload(data), 0, 0)
    }
    return success;
  }

  function getRandomnessFromProof(Proof memory proof, RequestCommitment memory rc)
    private
    view
    returns (
      bytes32 keyHash,
      uint256 requestId,
      uint256 randomness
    )
  {
    keyHash = hashOfKey(proof.pk);
    // Only registered proving keys are permitted.
    address oracle = s_provingKeys[keyHash];
    if (oracle == address(0)) {
      revert NoSuchProvingKey(keyHash);
    }
    requestId = uint256(keccak256(abi.encode(keyHash, proof.seed)));
    bytes32 commitment = s_requestCommitments[requestId];
    if (commitment == 0) {
      revert NoCorrespondingRequest();
    }
    if (
      commitment != keccak256(abi.encode(requestId, rc.blockNum, rc.subId, rc.callbackGasLimit, rc.numWords, rc.sender))
    ) {
      revert IncorrectCommitment();
    }

    bytes32 blockHash = blockhash(rc.blockNum);
    if (blockHash == bytes32(0)) {
      blockHash = BLOCKHASH_STORE.getBlockhash(rc.blockNum);
      if (blockHash == bytes32(0)) {
        revert BlockhashNotInStore(rc.blockNum);
      }
    }

    // The seed actually used by the VRF machinery, mixing in the blockhash
    uint256 actualSeed = uint256(keccak256(abi.encodePacked(proof.seed, blockHash)));
    randomness = VRF.randomValueFromVRFProof(proof, actualSeed); // Reverts on failure
  }

  /*
   * @notice Compute fee based on the request count
   * @param reqCount number of requests
   * @return feePPM fee in LINK PPM
   */
  function getFeeTier(uint64 reqCount) public view returns (uint32) {
    FeeConfig memory fc = s_feeConfig;
    if (0 <= reqCount && reqCount <= fc.reqsForTier2) {
      return fc.fulfillmentFlatFeeLinkPPMTier1;
    }
    if (fc.reqsForTier2 < reqCount && reqCount <= fc.reqsForTier3) {
      return fc.fulfillmentFlatFeeLinkPPMTier2;
    }
    if (fc.reqsForTier3 < reqCount && reqCount <= fc.reqsForTier4) {
      return fc.fulfillmentFlatFeeLinkPPMTier3;
    }
    if (fc.reqsForTier4 < reqCount && reqCount <= fc.reqsForTier5) {
      return fc.fulfillmentFlatFeeLinkPPMTier4;
    }
    return fc.fulfillmentFlatFeeLinkPPMTier5;
  }

  /*
   * @notice Fulfill a randomness request
   * @param proof contains the proof and randomness
   * @param rc request commitment pre-image, committed to at request time
   * @return payment amount billed to the subscription
   * @dev simulated offchain to determine if sufficient balance is present to fulfill the request
   */
  function fulfillRandomWords(Proof memory proof, RequestCommitment memory rc) external nonReentrant returns (uint96) {
    uint256 startGas = gasleft();
    (bytes32 keyHash, uint256 requestId, uint256 randomness) = getRandomnessFromProof(proof, rc);

    uint256[] memory randomWords = new uint256[](rc.numWords);
    for (uint256 i = 0; i < rc.numWords; i++) {
      randomWords[i] = uint256(keccak256(abi.encode(randomness, i)));
    }

    delete s_requestCommitments[requestId];
    VRFConsumerBaseV2 v;
    bytes memory resp = abi.encodeWithSelector(v.rawFulfillRandomWords.selector, requestId, randomWords);
    // Call with explicitly the amount of callback gas requested
    // Important to not let them exhaust the gas budget and avoid oracle payment.
    // Do not allow any non-view/non-pure coordinator functions to be called
    // during the consumers callback code via reentrancyLock.
    // Note that callWithExactGas will revert if we do not have sufficient gas
    // to give the callee their requested amount.
    s_config.reentrancyLock = true;
    bool success = callWithExactGas(rc.callbackGasLimit, rc.sender, resp);
    s_config.reentrancyLock = false;

    // Increment the req count for fee tier selection.
    uint64 reqCount = s_subscriptions[rc.subId].reqCount;
    s_subscriptions[rc.subId].reqCount += 1;

    // We want to charge users exactly for how much gas they use in their callback.
    // The gasAfterPaymentCalculation is meant to cover these additional operations where we
    // decrement the subscription balance and increment the oracles withdrawable balance.
    // We also add the flat link fee to the payment amount.
    // Its specified in millionths of link, if s_config.fulfillmentFlatFeeLinkPPM = 1
    // 1 link / 1e6 = 1e18 juels / 1e6 = 1e12 juels.
    uint96 payment = calculatePaymentAmount(
      startGas,
      s_config.gasAfterPaymentCalculation,
      getFeeTier(reqCount),
      tx.gasprice
    );
    if (s_subscriptions[rc.subId].balance < payment) {
      revert InsufficientBalance();
    }
    s_subscriptions[rc.subId].balance -= payment;
    s_withdrawableTokens[s_provingKeys[keyHash]] += payment;
    // Include payment in the event for tracking costs.
    emit RandomWordsFulfilled(requestId, randomness, payment, success);
    return payment;
  }

  // Get the amount of gas used for fulfillment
  function calculatePaymentAmount(
    uint256 startGas,
    uint256 gasAfterPaymentCalculation,
    uint32 fulfillmentFlatFeeLinkPPM,
    uint256 weiPerUnitGas
  ) internal view returns (uint96) {
    int256 weiPerUnitLink;
    weiPerUnitLink = getFeedData();
    if (weiPerUnitLink <= 0) {
      revert InvalidLinkWeiPrice(weiPerUnitLink);
    }
    // (1e18 juels/link) (wei/gas * gas) / (wei/link) = juels
    uint256 paymentNoFee = (1e18 * weiPerUnitGas * (gasAfterPaymentCalculation + startGas - gasleft())) /
      uint256(weiPerUnitLink);
    uint256 fee = 1e12 * uint256(fulfillmentFlatFeeLinkPPM);
    if (paymentNoFee > (1e27 - fee)) {
      revert PaymentTooLarge(); // Payment + fee cannot be more than all of the link in existence.
    }
    return uint96(paymentNoFee + fee);
  }

  function getFeedData() private view returns (int256) {
    uint32 stalenessSeconds = s_config.stalenessSeconds;
    bool staleFallback = stalenessSeconds > 0;
    uint256 timestamp;
    int256 weiPerUnitLink;
    (, weiPerUnitLink, , timestamp, ) = LINK_ETH_FEED.latestRoundData();
    // solhint-disable-next-line not-rely-on-time
    if (staleFallback && stalenessSeconds < block.timestamp - timestamp) {
      weiPerUnitLink = s_fallbackWeiPerUnitLink;
    }
    return weiPerUnitLink;
  }

  /*
   * @notice Oracle withdraw LINK earned through fulfilling requests
   * @param recipient where to send the funds
   * @param amount amount to withdraw
   */
  function oracleWithdraw(address recipient, uint96 amount) external nonReentrant {
    if (s_withdrawableTokens[msg.sender] < amount) {
      revert InsufficientBalance();
    }
    s_withdrawableTokens[msg.sender] -= amount;
    s_totalBalance -= amount;
    if (!LINK.transfer(recipient, amount)) {
      revert InsufficientBalance();
    }
  }

  function onTokenTransfer(
    address, /* sender */
    uint256 amount,
    bytes calldata data
  ) external override nonReentrant {
    if (msg.sender != address(LINK)) {
      revert OnlyCallableFromLink();
    }
    if (data.length != 32) {
      revert InvalidCalldata();
    }
    uint64 subId = abi.decode(data, (uint64));
    if (s_subscriptionConfigs[subId].owner == address(0)) {
      revert InvalidSubscription();
    }
    // We do not check that the msg.sender is the subscription owner,
    // anyone can fund a subscription.
    uint256 oldBalance = s_subscriptions[subId].balance;
    s_subscriptions[subId].balance += uint96(amount);
    s_totalBalance += uint96(amount);
    emit SubscriptionFunded(subId, oldBalance, oldBalance + amount);
  }

  function getCurrentSubId() external view returns (uint64) {
    return s_currentSubId;
  }

  /**
   * @inheritdoc VRFCoordinatorV2Interface
   */
  function getSubscription(uint64 subId)
    external
    view
    override
    returns (
      uint96 balance,
      uint64 reqCount,
      address owner,
      address[] memory consumers
    )
  {
    if (s_subscriptionConfigs[subId].owner == address(0)) {
      revert InvalidSubscription();
    }
    return (
      s_subscriptions[subId].balance,
      s_subscriptions[subId].reqCount,
      s_subscriptionConfigs[subId].owner,
      s_subscriptionConfigs[subId].consumers
    );
  }

  /**
   * @inheritdoc VRFCoordinatorV2Interface
   */
  function createSubscription() external override nonReentrant returns (uint64) {
    s_currentSubId++;
    uint64 currentSubId = s_currentSubId;
    address[] memory consumers = new address[](0);
    s_subscriptions[currentSubId] = Subscription({balance: 0, reqCount: 0});
    s_subscriptionConfigs[currentSubId] = SubscriptionConfig({
      owner: msg.sender,
      requestedOwner: address(0),
      consumers: consumers
    });

    emit SubscriptionCreated(currentSubId, msg.sender);
    return currentSubId;
  }

  /**
   * @inheritdoc VRFCoordinatorV2Interface
   */
  function requestSubscriptionOwnerTransfer(uint64 subId, address newOwner)
    external
    override
    onlySubOwner(subId)
    nonReentrant
  {
    // Proposing to address(0) would never be claimable so don't need to check.
    if (s_subscriptionConfigs[subId].requestedOwner != newOwner) {
      s_subscriptionConfigs[subId].requestedOwner = newOwner;
      emit SubscriptionOwnerTransferRequested(subId, msg.sender, newOwner);
    }
  }

  /**
   * @inheritdoc VRFCoordinatorV2Interface
   */
  function acceptSubscriptionOwnerTransfer(uint64 subId) external override nonReentrant {
    if (s_subscriptionConfigs[subId].owner == address(0)) {
      revert InvalidSubscription();
    }
    if (s_subscriptionConfigs[subId].requestedOwner != msg.sender) {
      revert MustBeRequestedOwner(s_subscriptionConfigs[subId].requestedOwner);
    }
    address oldOwner = s_subscriptionConfigs[subId].owner;
    s_subscriptionConfigs[subId].owner = msg.sender;
    s_subscriptionConfigs[subId].requestedOwner = address(0);
    emit SubscriptionOwnerTransferred(subId, oldOwner, msg.sender);
  }

  /**
   * @inheritdoc VRFCoordinatorV2Interface
   */
  function removeConsumer(uint64 subId, address consumer) external override onlySubOwner(subId) nonReentrant {
    if (s_consumers[consumer][subId] == 0) {
      revert InvalidConsumer(subId, consumer);
    }
    // Note bounded by MAX_CONSUMERS
    address[] memory consumers = s_subscriptionConfigs[subId].consumers;
    uint256 lastConsumerIndex = consumers.length - 1;
    for (uint256 i = 0; i < consumers.length; i++) {
      if (consumers[i] == consumer) {
        address last = consumers[lastConsumerIndex];
        // Storage write to preserve last element
        s_subscriptionConfigs[subId].consumers[i] = last;
        // Storage remove last element
        s_subscriptionConfigs[subId].consumers.pop();
        break;
      }
    }
    delete s_consumers[consumer][subId];
    emit SubscriptionConsumerRemoved(subId, consumer);
  }

  /**
   * @inheritdoc VRFCoordinatorV2Interface
   */
  function addConsumer(uint64 subId, address consumer) external override onlySubOwner(subId) nonReentrant {
    // Already maxed, cannot add any more consumers.
    if (s_subscriptionConfigs[subId].consumers.length == MAX_CONSUMERS) {
      revert TooManyConsumers();
    }
    if (s_consumers[consumer][subId] != 0) {
      // Idempotence - do nothing if already added.
      // Ensures uniqueness in s_subscriptions[subId].consumers.
      return;
    }
    // Initialize the nonce to 1, indicating the consumer is allocated.
    s_consumers[consumer][subId] = 1;
    s_subscriptionConfigs[subId].consumers.push(consumer);

    emit SubscriptionConsumerAdded(subId, consumer);
  }

  /**
   * @inheritdoc VRFCoordinatorV2Interface
   */
  function cancelSubscription(uint64 subId, address to) external override onlySubOwner(subId) nonReentrant {
    if (pendingRequestExists(subId)) {
      revert PendingRequestExists();
    }
    cancelSubscriptionHelper(subId, to);
  }

  function cancelSubscriptionHelper(uint64 subId, address to) private nonReentrant {
    SubscriptionConfig memory subConfig = s_subscriptionConfigs[subId];
    Subscription memory sub = s_subscriptions[subId];
    uint96 balance = sub.balance;
    // Note bounded by MAX_CONSUMERS;
    // If no consumers, does nothing.
    for (uint256 i = 0; i < subConfig.consumers.length; i++) {
      delete s_consumers[subConfig.consumers[i]][subId];
    }
    delete s_subscriptionConfigs[subId];
    delete s_subscriptions[subId];
    s_totalBalance -= balance;
    if (!LINK.transfer(to, uint256(balance))) {
      revert InsufficientBalance();
    }
    emit SubscriptionCanceled(subId, to, balance);
  }

  /*
   * @noticeCheck to see if there exists a request commitment consumers
   * for all consumers and keyhashes for a given sub.
   * @param subId where to send the funds
   * @return exits true if outstanding requests
   * @dev Looping is bounded to MAX_CONSUMERS*(number of keyhashes).
   * @dev Used to disable subscription canceling while outstanding request are present.
   */
  function pendingRequestExists(uint64 subId) public view returns (bool) {
    SubscriptionConfig memory subConfig = s_subscriptionConfigs[subId];
    for (uint256 i = 0; i < subConfig.consumers.length; i++) {
      for (uint256 j = 0; j < s_provingKeyHashes.length; j++) {
        (uint256 reqId, ) = computeRequestId(
          s_provingKeyHashes[j],
          subConfig.consumers[i],
          subId,
          s_consumers[subConfig.consumers[i]][subId]
        );
        if (s_requestCommitments[reqId] != 0) {
          return true;
        }
      }
    }
    return false;
  }

  modifier onlySubOwner(uint64 subId) {
    address owner = s_subscriptionConfigs[subId].owner;
    if (owner == address(0)) {
      revert InvalidSubscription();
    }
    if (msg.sender != owner) {
      revert MustBeSubOwner(owner);
    }
    _;
  }

  modifier nonReentrant() {
    if (s_config.reentrancyLock) {
      revert Reentrant();
    }
    _;
  }

  /**
   * @notice The type and version of this contract
   * @return Type and version string
   */
  function typeAndVersion() external pure virtual override returns (string memory) {
    return "VRFCoordinatorV2 1.0.0";
  }
}

// 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
pragma solidity ^0.8.0;

interface BlockhashStoreInterface {
  function getBlockhash(uint256 number) external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface AggregatorV3Interface {
  function decimals() external view returns (uint8);

  function description() external view returns (string memory);

  function version() external view returns (uint256);

  // getRoundData and latestRoundData should both raise "No data present"
  // if they do not have data to report, instead of returning unset values
  // which could be misinterpreted as actual reported values.
  function getRoundData(uint80 _roundId)
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

  function latestRoundData()
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );
}

// 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;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

abstract contract TypeAndVersionInterface {
  function typeAndVersion() external pure virtual returns (string memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;

interface ERC677ReceiverInterface {
  function onTokenTransfer(
    address sender,
    uint256 amount,
    bytes calldata data
  ) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/** ****************************************************************************
  * @notice Verification of verifiable-random-function (VRF) proofs, following
  * @notice https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-05#section-5.3
  * @notice See https://eprint.iacr.org/2017/099.pdf for security proofs.

  * @dev Bibliographic references:

  * @dev Goldberg, et al., "Verifiable Random Functions (VRFs)", Internet Draft
  * @dev draft-irtf-cfrg-vrf-05, IETF, Aug 11 2019,
  * @dev https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-05

  * @dev Papadopoulos, et al., "Making NSEC5 Practical for DNSSEC", Cryptology
  * @dev ePrint Archive, Report 2017/099, https://eprint.iacr.org/2017/099.pdf
  * ****************************************************************************
  * @dev USAGE

  * @dev The main entry point is randomValueFromVRFProof. See its docstring.
  * ****************************************************************************
  * @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 computationally indistinguishable to her from a uniform
  * @dev random sample from the output space.

  * @dev The purpose of this contract is to perform that verification.
  * ****************************************************************************
  * @dev DESIGN NOTES

  * @dev The VRF algorithm verified here satisfies the full uniqueness, full
  * @dev collision resistance, and full pseudo-randomness security properties.
  * @dev See "SECURITY PROPERTIES" below, and
  * @dev https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-05#section-3

  * @dev An elliptic curve point is generally represented in the solidity code
  * @dev as a uint256[2], corresponding to its affine coordinates in
  * @dev GF(FIELD_SIZE).

  * @dev For the sake of efficiency, this implementation deviates from the spec
  * @dev in some minor ways:

  * @dev - Keccak hash rather than the SHA256 hash recommended in
  * @dev   https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-05#section-5.5
  * @dev   Keccak costs much less gas on the EVM, and provides similar security.

  * @dev - Secp256k1 curve instead of the P-256 or ED25519 curves recommended in
  * @dev   https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-05#section-5.5
  * @dev   For curve-point multiplication, it's much cheaper to abuse ECRECOVER

  * @dev - hashToCurve recursively hashes until it finds a curve x-ordinate. On
  * @dev   the EVM, this is slightly more efficient than the recommendation in
  * @dev   https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-05#section-5.4.1.1
  * @dev   step 5, to concatenate with a nonce then hash, and rehash with the
  * @dev   nonce updated until a valid x-ordinate is found.

  * @dev - hashToCurve does not include a cipher version string or the byte 0x1
  * @dev   in the hash message, as recommended in step 5.B of the draft
  * @dev   standard. They are unnecessary here because no variation in the
  * @dev   cipher suite is allowed.

  * @dev - Similarly, the hash input in scalarFromCurvePoints does not include a
  * @dev   commitment to the cipher suite, either, which differs from step 2 of
  * @dev   https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-05#section-5.4.3
  * @dev   . Also, the hash input is the concatenation of the uncompressed
  * @dev   points, not the compressed points as recommended in step 3.

  * @dev - In the calculation of the challenge value "c", the "u" value (i.e.
  * @dev   the value computed by Reggie as the nonce times the secp256k1
  * @dev   generator point, see steps 5 and 7 of
  * @dev   https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-05#section-5.3
  * @dev   ) is replaced by its ethereum address, i.e. the lower 160 bits of the
  * @dev   keccak hash of the original u. This is because we only verify the
  * @dev   calculation of u up to its address, by abusing ECRECOVER.
  * ****************************************************************************
  * @dev   SECURITY PROPERTIES

  * @dev Here are the security properties for this VRF:

  * @dev Full uniqueness: For any seed and valid VRF public key, there is
  * @dev   exactly one VRF output which can be proved to come from that seed, in
  * @dev   the sense that the proof will pass verifyVRFProof.

  * @dev Full collision resistance: It's cryptographically infeasible to find
  * @dev   two seeds with same VRF output from a fixed, valid VRF key

  * @dev Full pseudorandomness: Absent the proofs that the VRF outputs are
  * @dev   derived from a given seed, the outputs are computationally
  * @dev   indistinguishable from randomness.

  * @dev https://eprint.iacr.org/2017/099.pdf, Appendix B contains the proofs
  * @dev for these properties.

  * @dev For secp256k1, the key validation described in section
  * @dev https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-05#section-5.6
  * @dev is unnecessary, because secp256k1 has cofactor 1, and the
  * @dev representation of the public key used here (affine x- and y-ordinates
  * @dev of the secp256k1 point on the standard y^2=x^3+7 curve) cannot refer to
  * @dev the point at infinity.
  * ****************************************************************************
  * @dev OTHER SECURITY CONSIDERATIONS
  *
  * @dev The seed input to the VRF could in principle force an arbitrary amount
  * @dev of work in hashToCurve, by requiring extra rounds of hashing and
  * @dev checking whether that's yielded the x ordinate of a secp256k1 point.
  * @dev However, under the Random Oracle Model the probability of choosing a
  * @dev point which forces n extra rounds in hashToCurve is 2⁻ⁿ. The base cost
  * @dev for calling hashToCurve is about 25,000 gas, and each round of checking
  * @dev for a valid x ordinate costs about 15,555 gas, so to find a seed for
  * @dev which hashToCurve would cost more than 2,017,000 gas, one would have to
  * @dev try, in expectation, about 2¹²⁸ seeds, which is infeasible for any
  * @dev foreseeable computational resources. (25,000 + 128 * 15,555 < 2,017,000.)

  * @dev Since the gas block limit for the Ethereum main net is 10,000,000 gas,
  * @dev this means it is infeasible for an adversary to prevent correct
  * @dev operation of this contract by choosing an adverse seed.

  * @dev (See TestMeasureHashToCurveGasCost for verification of the gas cost for
  * @dev hashToCurve.)

  * @dev It may be possible to make a secure constant-time hashToCurve function.
  * @dev See notes in hashToCurve docstring.
*/
contract VRF {
  // See https://www.secg.org/sec2-v2.pdf, section 2.4.1, for these constants.
  // Number of points in Secp256k1
  uint256 private constant GROUP_ORDER = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141;
  // Prime characteristic of the galois field over which Secp256k1 is defined
  uint256 private constant FIELD_SIZE =
    // solium-disable-next-line indentation
    0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F;
  uint256 private constant WORD_LENGTH_BYTES = 0x20;

  // (base^exponent) % FIELD_SIZE
  // Cribbed from https://medium.com/@rbkhmrcr/precompiles-solidity-e5d29bd428c4
  function bigModExp(uint256 base, uint256 exponent) internal view returns (uint256 exponentiation) {
    uint256 callResult;
    uint256[6] memory bigModExpContractInputs;
    bigModExpContractInputs[0] = WORD_LENGTH_BYTES; // Length of base
    bigModExpContractInputs[1] = WORD_LENGTH_BYTES; // Length of exponent
    bigModExpContractInputs[2] = WORD_LENGTH_BYTES; // Length of modulus
    bigModExpContractInputs[3] = base;
    bigModExpContractInputs[4] = exponent;
    bigModExpContractInputs[5] = FIELD_SIZE;
    uint256[1] memory output;
    assembly {
      // solhint-disable-line no-inline-assembly
      callResult := staticcall(
        not(0), // Gas cost: no limit
        0x05, // Bigmodexp contract address
        bigModExpContractInputs,
        0xc0, // Length of input segment: 6*0x20-bytes
        output,
        0x20 // Length of output segment
      )
    }
    if (callResult == 0) {
      revert("bigModExp failure!");
    }
    return output[0];
  }

  // Let q=FIELD_SIZE. q % 4 = 3, ∴ x≡r^2 mod q ⇒ x^SQRT_POWER≡±r mod q.  See
  // https://en.wikipedia.org/wiki/Modular_square_root#Prime_or_prime_power_modulus
  uint256 private constant SQRT_POWER = (FIELD_SIZE + 1) >> 2;

  // Computes a s.t. a^2 = x in the field. Assumes a exists
  function squareRoot(uint256 x) internal view returns (uint256) {
    return bigModExp(x, SQRT_POWER);
  }

  // The value of y^2 given that (x,y) is on secp256k1.
  function ySquared(uint256 x) internal pure returns (uint256) {
    // Curve is y^2=x^3+7. See section 2.4.1 of https://www.secg.org/sec2-v2.pdf
    uint256 xCubed = mulmod(x, mulmod(x, x, FIELD_SIZE), FIELD_SIZE);
    return addmod(xCubed, 7, FIELD_SIZE);
  }

  // True iff p is on secp256k1
  function isOnCurve(uint256[2] memory p) internal pure returns (bool) {
    // Section 2.3.6. in https://www.secg.org/sec1-v2.pdf
    // requires each ordinate to be in [0, ..., FIELD_SIZE-1]
    require(p[0] < FIELD_SIZE, "invalid x-ordinate");
    require(p[1] < FIELD_SIZE, "invalid y-ordinate");
    return ySquared(p[0]) == mulmod(p[1], p[1], FIELD_SIZE);
  }

  // Hash x uniformly into {0, ..., FIELD_SIZE-1}.
  function fieldHash(bytes memory b) internal pure returns (uint256 x_) {
    x_ = uint256(keccak256(b));
    // Rejecting if x >= FIELD_SIZE corresponds to step 2.1 in section 2.3.4 of
    // http://www.secg.org/sec1-v2.pdf , which is part of the definition of
    // string_to_point in the IETF draft
    while (x_ >= FIELD_SIZE) {
      x_ = uint256(keccak256(abi.encodePacked(x_)));
    }
  }

  // Hash b to a random point which hopefully lies on secp256k1. The y ordinate
  // is always even, due to
  // https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-05#section-5.4.1.1
  // step 5.C, which references arbitrary_string_to_point, defined in
  // https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-05#section-5.5 as
  // returning the point with given x ordinate, and even y ordinate.
  function newCandidateSecp256k1Point(bytes memory b) internal view returns (uint256[2] memory p) {
    unchecked {
      p[0] = fieldHash(b);
      p[1] = squareRoot(ySquared(p[0]));
      if (p[1] % 2 == 1) {
        // Note that 0 <= p[1] < FIELD_SIZE
        // so this cannot wrap, we use unchecked to save gas.
        p[1] = FIELD_SIZE - p[1];
      }
    }
  }

  // Domain-separation tag for initial hash in hashToCurve. Corresponds to
  // vrf.go/hashToCurveHashPrefix
  uint256 internal constant HASH_TO_CURVE_HASH_PREFIX = 1;

  // Cryptographic hash function onto the curve.
  //
  // Corresponds to algorithm in section 5.4.1.1 of the draft standard. (But see
  // DESIGN NOTES above for slight differences.)
  //
  // TODO(alx): Implement a bounded-computation hash-to-curve, as described in
  // "Construction of Rational Points on Elliptic Curves over Finite Fields"
  // http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.831.5299&rep=rep1&type=pdf
  // and suggested by
  // https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-hash-to-curve-01#section-5.2.2
  // (Though we can't used exactly that because secp256k1's j-invariant is 0.)
  //
  // This would greatly simplify the analysis in "OTHER SECURITY CONSIDERATIONS"
  // https://www.pivotaltracker.com/story/show/171120900
  function hashToCurve(uint256[2] memory pk, uint256 input) internal view returns (uint256[2] memory rv) {
    rv = newCandidateSecp256k1Point(abi.encodePacked(HASH_TO_CURVE_HASH_PREFIX, pk, input));
    while (!isOnCurve(rv)) {
      rv = newCandidateSecp256k1Point(abi.encodePacked(rv[0]));
    }
  }

  /** *********************************************************************
   * @notice Check that product==scalar*multiplicand
   *
   * @dev Based on Vitalik Buterin's idea in ethresear.ch post cited below.
   *
   * @param multiplicand: secp256k1 point
   * @param scalar: non-zero GF(GROUP_ORDER) scalar
   * @param product: secp256k1 expected to be multiplier * multiplicand
   * @return verifies true iff product==scalar*multiplicand, with cryptographically high probability
   */
  function ecmulVerify(
    uint256[2] memory multiplicand,
    uint256 scalar,
    uint256[2] memory product
  ) internal pure returns (bool verifies) {
    require(scalar != 0, "zero scalar"); // Rules out an ecrecover failure case
    uint256 x = multiplicand[0]; // x ordinate of multiplicand
    uint8 v = multiplicand[1] % 2 == 0 ? 27 : 28; // parity of y ordinate
    // https://ethresear.ch/t/you-can-kinda-abuse-ecrecover-to-do-ecmul-in-secp256k1-today/2384/9
    // Point corresponding to address ecrecover(0, v, x, s=scalar*x) is
    // (x⁻¹ mod GROUP_ORDER) * (scalar * x * multiplicand - 0 * g), i.e.
    // scalar*multiplicand. See https://crypto.stackexchange.com/a/18106
    bytes32 scalarTimesX = bytes32(mulmod(scalar, x, GROUP_ORDER));
    address actual = ecrecover(bytes32(0), v, bytes32(x), scalarTimesX);
    // Explicit conversion to address takes bottom 160 bits
    address expected = address(uint160(uint256(keccak256(abi.encodePacked(product)))));
    return (actual == expected);
  }

  // Returns x1/z1-x2/z2=(x1z2-x2z1)/(z1z2) in projective coordinates on P¹(𝔽ₙ)
  function projectiveSub(
    uint256 x1,
    uint256 z1,
    uint256 x2,
    uint256 z2
  ) internal pure returns (uint256 x3, uint256 z3) {
    unchecked {
      uint256 num1 = mulmod(z2, x1, FIELD_SIZE);
      // Note this cannot wrap since x2 is a point in [0, FIELD_SIZE-1]
      // we use unchecked to save gas.
      uint256 num2 = mulmod(FIELD_SIZE - x2, z1, FIELD_SIZE);
      (x3, z3) = (addmod(num1, num2, FIELD_SIZE), mulmod(z1, z2, FIELD_SIZE));
    }
  }

  // Returns x1/z1*x2/z2=(x1x2)/(z1z2), in projective coordinates on P¹(𝔽ₙ)
  function projectiveMul(
    uint256 x1,
    uint256 z1,
    uint256 x2,
    uint256 z2
  ) internal pure returns (uint256 x3, uint256 z3) {
    (x3, z3) = (mulmod(x1, x2, FIELD_SIZE), mulmod(z1, z2, FIELD_SIZE));
  }

  /** **************************************************************************
        @notice Computes elliptic-curve sum, in projective co-ordinates

        @dev Using projective coordinates avoids costly divisions

        @dev To use this with p and q in affine coordinates, call
        @dev projectiveECAdd(px, py, qx, qy). This will return
        @dev the addition of (px, py, 1) and (qx, qy, 1), in the
        @dev secp256k1 group.

        @dev This can be used to calculate the z which is the inverse to zInv
        @dev in isValidVRFOutput. But consider using a faster
        @dev re-implementation such as ProjectiveECAdd in the golang vrf package.

        @dev This function assumes [px,py,1],[qx,qy,1] are valid projective
             coordinates of secp256k1 points. That is safe in this contract,
             because this method is only used by linearCombination, which checks
             points are on the curve via ecrecover.
        **************************************************************************
        @param px The first affine coordinate of the first summand
        @param py The second affine coordinate of the first summand
        @param qx The first affine coordinate of the second summand
        @param qy The second affine coordinate of the second summand

        (px,py) and (qx,qy) must be distinct, valid secp256k1 points.
        **************************************************************************
        Return values are projective coordinates of [px,py,1]+[qx,qy,1] as points
        on secp256k1, in P²(𝔽ₙ)
        @return sx
        @return sy
        @return sz
    */
  function projectiveECAdd(
    uint256 px,
    uint256 py,
    uint256 qx,
    uint256 qy
  )
    internal
    pure
    returns (
      uint256 sx,
      uint256 sy,
      uint256 sz
    )
  {
    unchecked {
      // See "Group law for E/K : y^2 = x^3 + ax + b", in section 3.1.2, p. 80,
      // "Guide to Elliptic Curve Cryptography" by Hankerson, Menezes and Vanstone
      // We take the equations there for (sx,sy), and homogenize them to
      // projective coordinates. That way, no inverses are required, here, and we
      // only need the one inverse in affineECAdd.

      // We only need the "point addition" equations from Hankerson et al. Can
      // skip the "point doubling" equations because p1 == p2 is cryptographically
      // impossible, and required not to be the case in linearCombination.

      // Add extra "projective coordinate" to the two points
      (uint256 z1, uint256 z2) = (1, 1);

      // (lx, lz) = (qy-py)/(qx-px), i.e., gradient of secant line.
      // Cannot wrap since px and py are in [0, FIELD_SIZE-1]
      uint256 lx = addmod(qy, FIELD_SIZE - py, FIELD_SIZE);
      uint256 lz = addmod(qx, FIELD_SIZE - px, FIELD_SIZE);

      uint256 dx; // Accumulates denominator from sx calculation
      // sx=((qy-py)/(qx-px))^2-px-qx
      (sx, dx) = projectiveMul(lx, lz, lx, lz); // ((qy-py)/(qx-px))^2
      (sx, dx) = projectiveSub(sx, dx, px, z1); // ((qy-py)/(qx-px))^2-px
      (sx, dx) = projectiveSub(sx, dx, qx, z2); // ((qy-py)/(qx-px))^2-px-qx

      uint256 dy; // Accumulates denominator from sy calculation
      // sy=((qy-py)/(qx-px))(px-sx)-py
      (sy, dy) = projectiveSub(px, z1, sx, dx); // px-sx
      (sy, dy) = projectiveMul(sy, dy, lx, lz); // ((qy-py)/(qx-px))(px-sx)
      (sy, dy) = projectiveSub(sy, dy, py, z1); // ((qy-py)/(qx-px))(px-sx)-py

      if (dx != dy) {
        // Cross-multiply to put everything over a common denominator
        sx = mulmod(sx, dy, FIELD_SIZE);
        sy = mulmod(sy, dx, FIELD_SIZE);
        sz = mulmod(dx, dy, FIELD_SIZE);
      } else {
        // Already over a common denominator, use that for z ordinate
        sz = dx;
      }
    }
  }

  // p1+p2, as affine points on secp256k1.
  //
  // invZ must be the inverse of the z returned by projectiveECAdd(p1, p2).
  // It is computed off-chain to save gas.
  //
  // p1 and p2 must be distinct, because projectiveECAdd doesn't handle
  // point doubling.
  function affineECAdd(
    uint256[2] memory p1,
    uint256[2] memory p2,
    uint256 invZ
  ) internal pure returns (uint256[2] memory) {
    uint256 x;
    uint256 y;
    uint256 z;
    (x, y, z) = projectiveECAdd(p1[0], p1[1], p2[0], p2[1]);
    require(mulmod(z, invZ, FIELD_SIZE) == 1, "invZ must be inverse of z");
    // Clear the z ordinate of the projective representation by dividing through
    // by it, to obtain the affine representation
    return [mulmod(x, invZ, FIELD_SIZE), mulmod(y, invZ, FIELD_SIZE)];
  }

  // True iff address(c*p+s*g) == lcWitness, where g is generator. (With
  // cryptographically high probability.)
  function verifyLinearCombinationWithGenerator(
    uint256 c,
    uint256[2] memory p,
    uint256 s,
    address lcWitness
  ) internal pure returns (bool) {
    // Rule out ecrecover failure modes which return address 0.
    unchecked {
      require(lcWitness != address(0), "bad witness");
      uint8 v = (p[1] % 2 == 0) ? 27 : 28; // parity of y-ordinate of p
      // Note this cannot wrap (X - Y % X), but we use unchecked to save
      // gas.
      bytes32 pseudoHash = bytes32(GROUP_ORDER - mulmod(p[0], s, GROUP_ORDER)); // -s*p[0]
      bytes32 pseudoSignature = bytes32(mulmod(c, p[0], GROUP_ORDER)); // c*p[0]
      // https://ethresear.ch/t/you-can-kinda-abuse-ecrecover-to-do-ecmul-in-secp256k1-today/2384/9
      // The point corresponding to the address returned by
      // ecrecover(-s*p[0],v,p[0],c*p[0]) is
      // (p[0]⁻¹ mod GROUP_ORDER)*(c*p[0]-(-s)*p[0]*g)=c*p+s*g.
      // See https://crypto.stackexchange.com/a/18106
      // https://bitcoin.stackexchange.com/questions/38351/ecdsa-v-r-s-what-is-v
      address computed = ecrecover(pseudoHash, v, bytes32(p[0]), pseudoSignature);
      return computed == lcWitness;
    }
  }

  // c*p1 + s*p2. Requires cp1Witness=c*p1 and sp2Witness=s*p2. Also
  // requires cp1Witness != sp2Witness (which is fine for this application,
  // since it is cryptographically impossible for them to be equal. In the
  // (cryptographically impossible) case that a prover accidentally derives
  // a proof with equal c*p1 and s*p2, they should retry with a different
  // proof nonce.) Assumes that all points are on secp256k1
  // (which is checked in verifyVRFProof below.)
  function linearCombination(
    uint256 c,
    uint256[2] memory p1,
    uint256[2] memory cp1Witness,
    uint256 s,
    uint256[2] memory p2,
    uint256[2] memory sp2Witness,
    uint256 zInv
  ) internal pure returns (uint256[2] memory) {
    unchecked {
      // Note we are relying on the wrap around here
      require((cp1Witness[0] % FIELD_SIZE) != (sp2Witness[0] % FIELD_SIZE), "points in sum must be distinct");
      require(ecmulVerify(p1, c, cp1Witness), "First mul check failed");
      require(ecmulVerify(p2, s, sp2Witness), "Second mul check failed");
      return affineECAdd(cp1Witness, sp2Witness, zInv);
    }
  }

  // Domain-separation tag for the hash taken in scalarFromCurvePoints.
  // Corresponds to scalarFromCurveHashPrefix in vrf.go
  uint256 internal constant SCALAR_FROM_CURVE_POINTS_HASH_PREFIX = 2;

  // Pseudo-random number from inputs. Matches vrf.go/scalarFromCurvePoints, and
  // https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-05#section-5.4.3
  // The draft calls (in step 7, via the definition of string_to_int, in
  // https://datatracker.ietf.org/doc/html/rfc8017#section-4.2 ) for taking the
  // first hash without checking that it corresponds to a number less than the
  // group order, which will lead to a slight bias in the sample.
  //
  // TODO(alx): We could save a bit of gas by following the standard here and
  // using the compressed representation of the points, if we collated the y
  // parities into a single bytes32.
  // https://www.pivotaltracker.com/story/show/171120588
  function scalarFromCurvePoints(
    uint256[2] memory hash,
    uint256[2] memory pk,
    uint256[2] memory gamma,
    address uWitness,
    uint256[2] memory v
  ) internal pure returns (uint256 s) {
    return uint256(keccak256(abi.encodePacked(SCALAR_FROM_CURVE_POINTS_HASH_PREFIX, hash, pk, gamma, v, uWitness)));
  }

  // True if (gamma, c, s) is a correctly constructed randomness proof from pk
  // and seed. zInv must be the inverse of the third ordinate from
  // projectiveECAdd applied to cGammaWitness and sHashWitness. Corresponds to
  // section 5.3 of the IETF draft.
  //
  // TODO(alx): Since I'm only using pk in the ecrecover call, I could only pass
  // the x ordinate, and the parity of the y ordinate in the top bit of uWitness
  // (which I could make a uint256 without using any extra space.) Would save
  // about 2000 gas. https://www.pivotaltracker.com/story/show/170828567
  function verifyVRFProof(
    uint256[2] memory pk,
    uint256[2] memory gamma,
    uint256 c,
    uint256 s,
    uint256 seed,
    address uWitness,
    uint256[2] memory cGammaWitness,
    uint256[2] memory sHashWitness,
    uint256 zInv
  ) internal view {
    unchecked {
      require(isOnCurve(pk), "public key is not on curve");
      require(isOnCurve(gamma), "gamma is not on curve");
      require(isOnCurve(cGammaWitness), "cGammaWitness is not on curve");
      require(isOnCurve(sHashWitness), "sHashWitness is not on curve");
      // Step 5. of IETF draft section 5.3 (pk corresponds to 5.3's Y, and here
      // we use the address of u instead of u itself. Also, here we add the
      // terms instead of taking the difference, and in the proof construction in
      // vrf.GenerateProof, we correspondingly take the difference instead of
      // taking the sum as they do in step 7 of section 5.1.)
      require(verifyLinearCombinationWithGenerator(c, pk, s, uWitness), "addr(c*pk+s*g)!=_uWitness");
      // Step 4. of IETF draft section 5.3 (pk corresponds to Y, seed to alpha_string)
      uint256[2] memory hash = hashToCurve(pk, seed);
      // Step 6. of IETF draft section 5.3, but see note for step 5 about +/- terms
      uint256[2] memory v = linearCombination(c, gamma, cGammaWitness, s, hash, sHashWitness, zInv);
      // Steps 7. and 8. of IETF draft section 5.3
      uint256 derivedC = scalarFromCurvePoints(hash, pk, gamma, uWitness, v);
      require(c == derivedC, "invalid proof");
    }
  }

  // Domain-separation tag for the hash used as the final VRF output.
  // Corresponds to vrfRandomOutputHashPrefix in vrf.go
  uint256 internal constant VRF_RANDOM_OUTPUT_HASH_PREFIX = 3;

  struct Proof {
    uint256[2] pk;
    uint256[2] gamma;
    uint256 c;
    uint256 s;
    uint256 seed;
    address uWitness;
    uint256[2] cGammaWitness;
    uint256[2] sHashWitness;
    uint256 zInv;
  }

  /* ***************************************************************************
     * @notice Returns proof's output, if proof is valid. Otherwise reverts

     * @param proof vrf proof components
     * @param seed  seed used to generate the vrf output
     *
     * Throws if proof is invalid, otherwise:
     * @return output i.e., the random output implied by the proof
     * ***************************************************************************
     */
  function randomValueFromVRFProof(Proof memory proof, uint256 seed) internal view returns (uint256 output) {
    verifyVRFProof(
      proof.pk,
      proof.gamma,
      proof.c,
      proof.s,
      seed,
      proof.uWitness,
      proof.cGammaWitness,
      proof.sHashWitness,
      proof.zInv
    );
    output = uint256(keccak256(abi.encode(VRF_RANDOM_OUTPUT_HASH_PREFIX, proof.gamma)));
  }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./ConfirmedOwnerWithProposal.sol";

/**
 * @title The ConfirmedOwner contract
 * @notice A contract with helpers for basic contract ownership.
 */
contract ConfirmedOwner is ConfirmedOwnerWithProposal {
  constructor(address newOwner) ConfirmedOwnerWithProposal(newOwner, address(0)) {}
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/** ****************************************************************************
 * @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;

import "./interfaces/OwnableInterface.sol";

/**
 * @title The ConfirmedOwner contract
 * @notice A contract with helpers for basic contract ownership.
 */
contract ConfirmedOwnerWithProposal is OwnableInterface {
  address private s_owner;
  address private s_pendingOwner;

  event OwnershipTransferRequested(address indexed from, address indexed to);
  event OwnershipTransferred(address indexed from, address indexed to);

  constructor(address newOwner, address pendingOwner) {
    require(newOwner != address(0), "Cannot set owner to zero");

    s_owner = newOwner;
    if (pendingOwner != address(0)) {
      _transferOwnership(pendingOwner);
    }
  }

  /**
   * @notice Allows an owner to begin transferring ownership to a new address,
   * pending.
   */
  function transferOwnership(address to) public override onlyOwner {
    _transferOwnership(to);
  }

  /**
   * @notice Allows an ownership transfer to be completed by the recipient.
   */
  function acceptOwnership() external override {
    require(msg.sender == s_pendingOwner, "Must be proposed owner");

    address oldOwner = s_owner;
    s_owner = msg.sender;
    s_pendingOwner = address(0);

    emit OwnershipTransferred(oldOwner, msg.sender);
  }

  /**
   * @notice Get the current owner
   */
  function owner() public view override returns (address) {
    return s_owner;
  }

  /**
   * @notice validate, transfer ownership, and emit relevant events
   */
  function _transferOwnership(address to) private {
    require(to != msg.sender, "Cannot transfer to self");

    s_pendingOwner = to;

    emit OwnershipTransferRequested(s_owner, to);
  }

  /**
   * @notice validate access
   */
  function _validateOwnership() internal view {
    require(msg.sender == s_owner, "Only callable by owner");
  }

  /**
   * @notice Reverts if called by anyone other than the contract owner.
   */
  modifier onlyOwner() {
    _validateOwnership();
    _;
  }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface OwnableInterface {
  function owner() external returns (address);

  function transferOwnership(address recipient) external;

  function acceptOwnership() external;
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "metadata": {
    "bytecodeHash": "none"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

[{"inputs":[{"internalType":"address","name":"link","type":"address"},{"internalType":"address","name":"blockhashStore","type":"address"},{"internalType":"address","name":"linkEthFeed","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"uint256","name":"internalBalance","type":"uint256"},{"internalType":"uint256","name":"externalBalance","type":"uint256"}],"name":"BalanceInvariantViolated","type":"error"},{"inputs":[{"internalType":"uint256","name":"blockNum","type":"uint256"}],"name":"BlockhashNotInStore","type":"error"},{"inputs":[{"internalType":"uint32","name":"have","type":"uint32"},{"internalType":"uint32","name":"want","type":"uint32"}],"name":"GasLimitTooBig","type":"error"},{"inputs":[],"name":"IncorrectCommitment","type":"error"},{"inputs":[],"name":"InsufficientBalance","type":"error"},{"inputs":[{"internalType":"uint256","name":"have","type":"uint256"},{"internalType":"uint256","name":"want","type":"uint256"}],"name":"InsufficientGasForConsumer","type":"error"},{"inputs":[],"name":"InvalidCalldata","type":"error"},{"inputs":[{"internalType":"uint64","name":"subId","type":"uint64"},{"internalType":"address","name":"consumer","type":"address"}],"name":"InvalidConsumer","type":"error"},{"inputs":[{"internalType":"int256","name":"linkWei","type":"int256"}],"name":"InvalidLinkWeiPrice","type":"error"},{"inputs":[{"internalType":"uint16","name":"have","type":"uint16"},{"internalType":"uint16","name":"min","type":"uint16"},{"internalType":"uint16","name":"max","type":"uint16"}],"name":"InvalidRequestConfirmations","type":"error"},{"inputs":[],"name":"InvalidSubscription","type":"error"},{"inputs":[{"internalType":"address","name":"proposedOwner","type":"address"}],"name":"MustBeRequestedOwner","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"MustBeSubOwner","type":"error"},{"inputs":[],"name":"NoCorrespondingRequest","type":"error"},{"inputs":[{"internalType":"bytes32","name":"keyHash","type":"bytes32"}],"name":"NoSuchProvingKey","type":"error"},{"inputs":[{"internalType":"uint32","name":"have","type":"uint32"},{"internalType":"uint32","name":"want","type":"uint32"}],"name":"NumWordsTooBig","type":"error"},{"inputs":[],"name":"OnlyCallableFromLink","type":"error"},{"inputs":[],"name":"PaymentTooLarge","type":"error"},{"inputs":[],"name":"PendingRequestExists","type":"error"},{"inputs":[{"internalType":"bytes32","name":"keyHash","type":"bytes32"}],"name":"ProvingKeyAlreadyRegistered","type":"error"},{"inputs":[],"name":"Reentrant","type":"error"},{"inputs":[],"name":"TooManyConsumers","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint16","name":"minimumRequestConfirmations","type":"uint16"},{"indexed":false,"internalType":"uint32","name":"maxGasLimit","type":"uint32"},{"indexed":false,"internalType":"uint32","name":"stalenessSeconds","type":"uint32"},{"indexed":false,"internalType":"uint32","name":"gasAfterPaymentCalculation","type":"uint32"},{"indexed":false,"internalType":"int256","name":"fallbackWeiPerUnitLink","type":"int256"},{"components":[{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier1","type":"uint32"},{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier2","type":"uint32"},{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier3","type":"uint32"},{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier4","type":"uint32"},{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier5","type":"uint32"},{"internalType":"uint24","name":"reqsForTier2","type":"uint24"},{"internalType":"uint24","name":"reqsForTier3","type":"uint24"},{"internalType":"uint24","name":"reqsForTier4","type":"uint24"},{"internalType":"uint24","name":"reqsForTier5","type":"uint24"}],"indexed":false,"internalType":"struct VRFCoordinatorV2.FeeConfig","name":"feeConfig","type":"tuple"}],"name":"ConfigSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"FundsRecovered","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"OwnershipTransferRequested","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"keyHash","type":"bytes32"},{"indexed":true,"internalType":"address","name":"oracle","type":"address"}],"name":"ProvingKeyDeregistered","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"keyHash","type":"bytes32"},{"indexed":true,"internalType":"address","name":"oracle","type":"address"}],"name":"ProvingKeyRegistered","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"requestId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"outputSeed","type":"uint256"},{"indexed":false,"internalType":"uint96","name":"payment","type":"uint96"},{"indexed":false,"internalType":"bool","name":"success","type":"bool"}],"name":"RandomWordsFulfilled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"keyHash","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"requestId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"preSeed","type":"uint256"},{"indexed":true,"internalType":"uint64","name":"subId","type":"uint64"},{"indexed":false,"internalType":"uint16","name":"minimumRequestConfirmations","type":"uint16"},{"indexed":false,"internalType":"uint32","name":"callbackGasLimit","type":"uint32"},{"indexed":false,"internalType":"uint32","name":"numWords","type":"uint32"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RandomWordsRequested","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint64","name":"subId","type":"uint64"},{"indexed":false,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"SubscriptionCanceled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint64","name":"subId","type":"uint64"},{"indexed":false,"internalType":"address","name":"consumer","type":"address"}],"name":"SubscriptionConsumerAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint64","name":"subId","type":"uint64"},{"indexed":false,"internalType":"address","name":"consumer","type":"address"}],"name":"SubscriptionConsumerRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint64","name":"subId","type":"uint64"},{"indexed":false,"internalType":"address","name":"owner","type":"address"}],"name":"SubscriptionCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint64","name":"subId","type":"uint64"},{"indexed":false,"internalType":"uint256","name":"oldBalance","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newBalance","type":"uint256"}],"name":"SubscriptionFunded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint64","name":"subId","type":"uint64"},{"indexed":false,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"address","name":"to","type":"address"}],"name":"SubscriptionOwnerTransferRequested","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint64","name":"subId","type":"uint64"},{"indexed":false,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"address","name":"to","type":"address"}],"name":"SubscriptionOwnerTransferred","type":"event"},{"inputs":[],"name":"BLOCKHASH_STORE","outputs":[{"internalType":"contract BlockhashStoreInterface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"LINK","outputs":[{"internalType":"contract LinkTokenInterface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"LINK_ETH_FEED","outputs":[{"internalType":"contract AggregatorV3Interface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_CONSUMERS","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_NUM_WORDS","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_REQUEST_CONFIRMATIONS","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"subId","type":"uint64"}],"name":"acceptSubscriptionOwnerTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"subId","type":"uint64"},{"internalType":"address","name":"consumer","type":"address"}],"name":"addConsumer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"subId","type":"uint64"},{"internalType":"address","name":"to","type":"address"}],"name":"cancelSubscription","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"createSubscription","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[2]","name":"publicProvingKey","type":"uint256[2]"}],"name":"deregisterProvingKey","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"uint256[2]","name":"pk","type":"uint256[2]"},{"internalType":"uint256[2]","name":"gamma","type":"uint256[2]"},{"internalType":"uint256","name":"c","type":"uint256"},{"internalType":"uint256","name":"s","type":"uint256"},{"internalType":"uint256","name":"seed","type":"uint256"},{"internalType":"address","name":"uWitness","type":"address"},{"internalType":"uint256[2]","name":"cGammaWitness","type":"uint256[2]"},{"internalType":"uint256[2]","name":"sHashWitness","type":"uint256[2]"},{"internalType":"uint256","name":"zInv","type":"uint256"}],"internalType":"struct VRF.Proof","name":"proof","type":"tuple"},{"components":[{"internalType":"uint64","name":"blockNum","type":"uint64"},{"internalType":"uint64","name":"subId","type":"uint64"},{"internalType":"uint32","name":"callbackGasLimit","type":"uint32"},{"internalType":"uint32","name":"numWords","type":"uint32"},{"internalType":"address","name":"sender","type":"address"}],"internalType":"struct VRFCoordinatorV2.RequestCommitment","name":"rc","type":"tuple"}],"name":"fulfillRandomWords","outputs":[{"internalType":"uint96","name":"","type":"uint96"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"requestId","type":"uint256"}],"name":"getCommitment","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getConfig","outputs":[{"internalType":"uint16","name":"minimumRequestConfirmations","type":"uint16"},{"internalType":"uint32","name":"maxGasLimit","type":"uint32"},{"internalType":"uint32","name":"stalenessSeconds","type":"uint32"},{"internalType":"uint32","name":"gasAfterPaymentCalculation","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentSubId","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getFallbackWeiPerUnitLink","outputs":[{"internalType":"int256","name":"","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getFeeConfig","outputs":[{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier1","type":"uint32"},{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier2","type":"uint32"},{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier3","type":"uint32"},{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier4","type":"uint32"},{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier5","type":"uint32"},{"internalType":"uint24","name":"reqsForTier2","type":"uint24"},{"internalType":"uint24","name":"reqsForTier3","type":"uint24"},{"internalType":"uint24","name":"reqsForTier4","type":"uint24"},{"internalType":"uint24","name":"reqsForTier5","type":"uint24"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint64","name":"reqCount","type":"uint64"}],"name":"getFeeTier","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getRequestConfig","outputs":[{"internalType":"uint16","name":"","type":"uint16"},{"internalType":"uint32","name":"","type":"uint32"},{"internalType":"bytes32[]","name":"","type":"bytes32[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint64","name":"subId","type":"uint64"}],"name":"getSubscription","outputs":[{"internalType":"uint96","name":"balance","type":"uint96"},{"internalType":"uint64","name":"reqCount","type":"uint64"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"address[]","name":"consumers","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTotalBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256[2]","name":"publicKey","type":"uint256[2]"}],"name":"hashOfKey","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"onTokenTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint96","name":"amount","type":"uint96"}],"name":"oracleWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint64","name":"subId","type":"uint64"}],"name":"ownerCancelSubscription","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"subId","type":"uint64"}],"name":"pendingRequestExists","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"recoverFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"oracle","type":"address"},{"internalType":"uint256[2]","name":"publicProvingKey","type":"uint256[2]"}],"name":"registerProvingKey","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"subId","type":"uint64"},{"internalType":"address","name":"consumer","type":"address"}],"name":"removeConsumer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"keyHash","type":"bytes32"},{"internalType":"uint64","name":"subId","type":"uint64"},{"internalType":"uint16","name":"requestConfirmations","type":"uint16"},{"internalType":"uint32","name":"callbackGasLimit","type":"uint32"},{"internalType":"uint32","name":"numWords","type":"uint32"}],"name":"requestRandomWords","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"subId","type":"uint64"},{"internalType":"address","name":"newOwner","type":"address"}],"name":"requestSubscriptionOwnerTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"minimumRequestConfirmations","type":"uint16"},{"internalType":"uint32","name":"maxGasLimit","type":"uint32"},{"internalType":"uint32","name":"stalenessSeconds","type":"uint32"},{"internalType":"uint32","name":"gasAfterPaymentCalculation","type":"uint32"},{"internalType":"int256","name":"fallbackWeiPerUnitLink","type":"int256"},{"components":[{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier1","type":"uint32"},{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier2","type":"uint32"},{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier3","type":"uint32"},{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier4","type":"uint32"},{"internalType":"uint32","name":"fulfillmentFlatFeeLinkPPMTier5","type":"uint32"},{"internalType":"uint24","name":"reqsForTier2","type":"uint24"},{"internalType":"uint24","name":"reqsForTier3","type":"uint24"},{"internalType":"uint24","name":"reqsForTier4","type":"uint24"},{"internalType":"uint24","name":"reqsForTier5","type":"uint24"}],"internalType":"struct VRFCoordinatorV2.FeeConfig","name":"feeConfig","type":"tuple"}],"name":"setConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"typeAndVersion","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"}]

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

0000000000000000000000005947bb275c521040051d82396192181b413227a300000000000000000000000078b69899c8cd252126cbb1a50171ec37286c38770000000000000000000000001b8a25f73c9420dd507406c3a3816a276b62f56a

-----Decoded View---------------
Arg [0] : link (address): 0x5947bb275c521040051d82396192181b413227a3
Arg [1] : blockhashStore (address): 0x78b69899c8cd252126cbb1a50171ec37286c3877
Arg [2] : linkEthFeed (address): 0x1b8a25f73c9420dd507406c3a3816a276b62f56a

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000005947bb275c521040051d82396192181b413227a3
Arg [1] : 00000000000000000000000078b69899c8cd252126cbb1a50171ec37286c3877
Arg [2] : 0000000000000000000000001b8a25f73c9420dd507406c3a3816a276b62f56a