Contract 0x6179b349067af80d0c171f43e6d767e4a00775cd 8

Txn Hash
Method
Block
From
To
Value [Txn Fee]
0x36359a6d55ac3928af3b9a99aa93eaa0e076b739f0f241ea8057d34c8712caa2Perform Upkeep336817382023-03-28 18:33:0921 mins ago0xf3a50c34b5182d0f1f28d7c066f2d7ecfbfdaa47 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.0385057260
0x9d8acb76ef7fb6118ce2d91ffabe22c960400f53fe34f149094cd6143d3cd4efPerform Upkeep336811312023-03-28 18:11:3943 mins ago0xf3a50c34b5182d0f1f28d7c066f2d7ecfbfdaa47 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.0031574766384.290370392
0xcdee37a909943a6b5e8819971c166a4460a1026d17fdfe03424f55ca8a04c449Perform Upkeep336808322023-03-28 18:01:0553 mins ago0xf3a50c34b5182d0f1f28d7c066f2d7ecfbfdaa47 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.004997850639.4
0x17bb0dbcc2eaca8daa526d2e40b16b6d8bcf008812c5888d8f300315f60fd6a2Perform Upkeep336807792023-03-28 17:59:1155 mins ago0x520a0a0162dfd9cae01b392be60fd78b30c1ecee IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.00448016569240.1452136
0x116c59734a643cd0efdfca94a4ed877183820f9e86a38f35b873f0efa83d8e42Perform Upkeep336807752023-03-28 17:59:0355 mins ago0x40ec16325a9efa346c16f4f6500d348b1f4f3b51 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.00448016569240.1452136
0xb1503a143d67b49d028fe960709d6047255153bcc10b7ad81cfc9c5833e07fedPerform Upkeep336807692023-03-28 17:58:5156 mins ago0xf3a50c34b5182d0f1f28d7c066f2d7ecfbfdaa47 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.00471322489943.13217142
0xfa64ff2c087af61a9d22848edd9c7a900152155dcaaa16dadac8c2f400c727a6Perform Upkeep336802992023-03-28 17:42:111 hr 12 mins ago0x520a0a0162dfd9cae01b392be60fd78b30c1ecee IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.0384649664256.03199255
0x0c97ada5592209ac001b20dc1fb48baf347c1bf9759d132a22ea42b005b56e84Perform Upkeep336802612023-03-28 17:40:511 hr 14 mins ago0x6218cf0ab8dce1aac946f4abe688d2d293305dda IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.038468038784256.03199255
0x3d952641119653763c6d96eaa0c33ec9a67a4d6216c275ad2a836aaef1d0c914Perform Upkeep336802232023-03-28 17:39:291 hr 15 mins ago0x520a0a0162dfd9cae01b392be60fd78b30c1ecee IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.042846185856256.031992546
0xed35092cfef3f70689f4c0624e24bb7414fba92228eac1ca47e724797ac10deePerform Upkeep336791452023-03-28 17:01:191 hr 53 mins ago0x40ec16325a9efa346c16f4f6500d348b1f4f3b51 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.01990865709156.947686548
0x7bcbd02ce436f0954cc17ed912b9826793f196d30fbdc142fd981f2372b073cbPerform Upkeep336790682023-03-28 16:58:351 hr 56 mins ago0xf3a50c34b5182d0f1f28d7c066f2d7ecfbfdaa47 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.01751520487156.947686544
0xee7bbfc1be0337dc7d26711bfb9ebc5d759eb82995a8db2b0e6989841bd83268Perform Upkeep336790582023-03-28 16:58:151 hr 56 mins ago0x40ec16325a9efa346c16f4f6500d348b1f4f3b51 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.017150301499156.947686543
0x7401cab690f6c2d35d51be992bad062646bd640713664433ebb20aac0e20e91aPerform Upkeep336790102023-03-28 16:56:331 hr 58 mins ago0x40ec16325a9efa346c16f4f6500d348b1f4f3b51 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.015705214516140.728989653
0x73536b41ed243981f8346f7b087a0545f05b8cc07b9b636bebdf2ef64f04c656Perform Upkeep336785742023-03-28 16:41:052 hrs 13 mins ago0x520a0a0162dfd9cae01b392be60fd78b30c1ecee IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.017036188455120.728989631
0x7000d19d9bc458aa1277f213bb65818b6c8b5c3fb3b4e03c7669c0589f31dee2Perform Upkeep336780992023-03-28 16:24:172 hrs 30 mins ago0x40ec16325a9efa346c16f4f6500d348b1f4f3b51 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.01309825027120.728989614
0x9c676bf97ac07d8ac4041453c4f40eabb2d6643a8aef5556271f17e7b53934b8Perform Upkeep336774802023-03-28 16:02:212 hrs 52 mins ago0x520a0a0162dfd9cae01b392be60fd78b30c1ecee IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.015314351607120.728989649
0xfa41dcdb91e6f17510cfe2b4a634546fad17ee49b19815d78c310940de14d576Perform Upkeep336773342023-03-28 15:57:112 hrs 57 mins ago0xf3a50c34b5182d0f1f28d7c066f2d7ecfbfdaa47 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.013192539607120.728989581
0xad6ac6bdf14160f7afdfb1754b8710f3757386a58069b9a457cdd8007f168d72Perform Upkeep336773312023-03-28 15:57:052 hrs 57 mins ago0x6218cf0ab8dce1aac946f4abe688d2d293305dda IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.013473234508120.72898958
0x1bb0c4ce2101a3f824b6c5a6f1bee9680acae0b7e28ab639b692aac6ebb9abb9Perform Upkeep336773082023-03-28 15:56:152 hrs 58 mins ago0x520a0a0162dfd9cae01b392be60fd78b30c1ecee IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.00463135850241.500000019
0x86d9d0d571126b153f97bb463cd5c41756bfbbeca31a3e43dbd3cb40fc5376fePerform Upkeep336757392023-03-28 15:00:413 hrs 54 mins ago0x6218cf0ab8dce1aac946f4abe688d2d293305dda IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.00534100137542.105191017
0x31ec42a1059b877ef37f43596d5a6f931cc8570aac6d6bb6cdee3a84f609cb1bPerform Upkeep336756062023-03-28 14:55:593 hrs 59 mins ago0x40ec16325a9efa346c16f4f6500d348b1f4f3b51 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.0082235993475.256688145
0x54a688109754f58ef0a7974c0b19e090fb3c9c2c93371697e91eb84b8f57a8b4Perform Upkeep336755982023-03-28 14:55:413 hrs 59 mins ago0x6218cf0ab8dce1aac946f4abe688d2d293305dda IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.013473234507120.728989578
0xd4b3bc95491001dc56137fb8393c52938e15b1a515a5dcb4084fa860e1407f07Perform Upkeep336755652023-03-28 14:54:314 hrs ago0xf3a50c34b5182d0f1f28d7c066f2d7ecfbfdaa47 IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.013473234507120.728989578
0x6e19c902ebf2c91df0c89cfbc1270793a34e7cfd4279cd0eb7663ca7c4d89c20Perform Upkeep336749312023-03-28 14:32:054 hrs 22 mins ago0x6218cf0ab8dce1aac946f4abe688d2d293305dda IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.00758364323642.822700015
0x6b6fd1ded822777ce482dbac99e60c91ba4322049013e629e734b12bff5bf19ePerform Upkeep336747492023-03-28 14:25:374 hrs 29 mins ago0x520a0a0162dfd9cae01b392be60fd78b30c1ecee IN  0x6179b349067af80d0c171f43e6d767e4a00775cd0 MATIC0.019961210407120.728989578
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Contract Source Code Verified (Exact Match)

Contract Name:
KeeperRegistry

Compiler Version
v0.7.6+commit.7338295f

Optimization Enabled:
Yes with 1000000 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 18 : KeeperBase.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

contract KeeperBase {

  /**
   * @notice method that allows it to be simulated via eth_call by checking that
   * the sender is the zero address.
   */
  function preventExecution()
    internal
    view
  {
    require(tx.origin == address(0), "only for simulated backend");
  }

  /**
   * @notice modifier that allows it to be simulated via eth_call by checking
   * that the sender is the zero address.
   */
  modifier cannotExecute()
  {
    preventExecution();
    _;
  }

}

File 2 of 18 : KeeperRegistry.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

import "@chainlink/contracts/src/v0.6/interfaces/AggregatorV3Interface.sol";
import "@chainlink/contracts/src/v0.7/interfaces/LinkTokenInterface.sol";
import "@chainlink/contracts/src/v0.7/vendor/SafeMathChainlink.sol";
import "./vendor/Owned.sol";
import "./vendor/Address.sol";
import "./vendor/Pausable.sol";
import "./vendor/ReentrancyGuard.sol";
import "./vendor/SignedSafeMath.sol";
import "./SafeMath96.sol";
import "./KeeperBase.sol";
import "./KeeperCompatibleInterface.sol";
import "./KeeperRegistryInterface.sol";

/**
  * @notice Registry for adding work for Chainlink Keepers to perform on client
  * contracts. Clients must support the Upkeep interface.
  */
contract KeeperRegistry is
  Owned,
  KeeperBase,
  ReentrancyGuard,
  Pausable,
  KeeperRegistryExecutableInterface
{
  using Address for address;
  using SafeMathChainlink for uint256;
  using SafeMath96 for uint96;
  using SignedSafeMath for int256;

  address constant private ZERO_ADDRESS = address(0);
  address constant private IGNORE_ADDRESS = 0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF;
  bytes4 constant private CHECK_SELECTOR = KeeperCompatibleInterface.checkUpkeep.selector;
  bytes4 constant private PERFORM_SELECTOR = KeeperCompatibleInterface.performUpkeep.selector;
  uint256 constant private CALL_GAS_MAX = 5_000_000;
  uint256 constant private CALL_GAS_MIN = 2_300;
  uint256 constant private CANCELATION_DELAY = 50;
  uint256 constant private CUSHION = 5_000;
  uint256 constant private REGISTRY_GAS_OVERHEAD = 80_000;
  uint256 constant private PPB_BASE = 1_000_000_000;
  uint64 constant private UINT64_MAX = 2**64 - 1;
  uint96 constant private LINK_TOTAL_SUPPLY = 1e27;

  uint256 private s_upkeepCount;
  uint256[] private s_canceledUpkeepList;
  address[] private s_keeperList;
  mapping(uint256 => Upkeep) private s_upkeep;
  mapping(address => KeeperInfo) private s_keeperInfo;
  mapping(address => address) private s_proposedPayee;
  mapping(uint256 => bytes) private s_checkData;
  Config private s_config;
  uint256 private s_fallbackGasPrice;  // not in config object for gas savings
  uint256 private s_fallbackLinkPrice; // not in config object for gas savings
  uint256 private s_expectedLinkBalance;

  LinkTokenInterface public immutable LINK;
  AggregatorV3Interface public immutable LINK_ETH_FEED;
  AggregatorV3Interface public immutable FAST_GAS_FEED;

  address private s_registrar;

  struct Upkeep {
    address target;
    uint32 executeGas;
    uint96 balance;
    address admin;
    uint64 maxValidBlocknumber;
    address lastKeeper;
  }

  struct KeeperInfo {
    address payee;
    uint96 balance;
    bool active;
  }

  struct Config {
    uint32 paymentPremiumPPB;
    uint24 blockCountPerTurn;
    uint32 checkGasLimit;
    uint24 stalenessSeconds;
    uint16 gasCeilingMultiplier;
  }

  struct PerformParams {
    address from;
    uint256 id;
    bytes performData;
    uint256 maxLinkPayment;
    uint256 gasLimit;
    uint256 adjustedGasWei;
    uint256 linkEth;
  }

  event UpkeepRegistered(
    uint256 indexed id,
    uint32 executeGas,
    address admin
  );
  event UpkeepPerformed(
    uint256 indexed id,
    bool indexed success,
    address indexed from,
    uint96 payment,
    bytes performData
  );
  event UpkeepCanceled(
    uint256 indexed id,
    uint64 indexed atBlockHeight
  );
  event FundsAdded(
    uint256 indexed id,
    address indexed from,
    uint96 amount
  );
  event FundsWithdrawn(
    uint256 indexed id,
    uint256 amount,
    address to
  );
  event ConfigSet(
    uint32 paymentPremiumPPB,
    uint24 blockCountPerTurn,
    uint32 checkGasLimit,
    uint24 stalenessSeconds,
    uint16 gasCeilingMultiplier,
    uint256 fallbackGasPrice,
    uint256 fallbackLinkPrice
  );
  event KeepersUpdated(
    address[] keepers,
    address[] payees
  );
  event PaymentWithdrawn(
    address indexed keeper,
    uint256 indexed amount,
    address indexed to,
    address payee
  );
  event PayeeshipTransferRequested(
    address indexed keeper,
    address indexed from,
    address indexed to
  );
  event PayeeshipTransferred(
    address indexed keeper,
    address indexed from,
    address indexed to
  );
  event RegistrarChanged(
    address indexed from,
    address indexed to
  );
  /**
   * @param link address of the LINK Token
   * @param linkEthFeed address of the LINK/ETH price feed
   * @param fastGasFeed address of the Fast Gas price feed
   * @param paymentPremiumPPB payment premium rate oracles receive on top of
   * being reimbursed for gas, measured in parts per billion
   * @param blockCountPerTurn number of blocks each oracle has during their turn to
   * perform upkeep before it will be the next keeper's turn to submit
   * @param checkGasLimit gas limit when checking for upkeep
   * @param stalenessSeconds number of seconds that is allowed for feed data to
   * be stale before switching to the fallback pricing
   * @param gasCeilingMultiplier multiplier to apply to the fast gas feed price
   * when calculating the payment ceiling for keepers
   * @param fallbackGasPrice gas price used if the gas price feed is stale
   * @param fallbackLinkPrice LINK price used if the LINK price feed is stale
   */
  constructor(
    address link,
    address linkEthFeed,
    address fastGasFeed,
    uint32 paymentPremiumPPB,
    uint24 blockCountPerTurn,
    uint32 checkGasLimit,
    uint24 stalenessSeconds,
    uint16 gasCeilingMultiplier,
    uint256 fallbackGasPrice,
    uint256 fallbackLinkPrice
  ) {
    LINK = LinkTokenInterface(link);
    LINK_ETH_FEED = AggregatorV3Interface(linkEthFeed);
    FAST_GAS_FEED = AggregatorV3Interface(fastGasFeed);

    setConfig(
      paymentPremiumPPB,
      blockCountPerTurn,
      checkGasLimit,
      stalenessSeconds,
      gasCeilingMultiplier,
      fallbackGasPrice,
      fallbackLinkPrice
    );
  }


  // ACTIONS

  /**
   * @notice adds a new upkeep
   * @param target address to perform upkeep on
   * @param gasLimit amount of gas to provide the target contract when
   * performing upkeep
   * @param admin address to cancel upkeep and withdraw remaining funds
   * @param checkData data passed to the contract when checking for upkeep
   */
  function registerUpkeep(
    address target,
    uint32 gasLimit,
    address admin,
    bytes calldata checkData
  )
    external
    override
    onlyOwnerOrRegistrar()
    returns (
      uint256 id
    )
  {
    require(target.isContract(), "target is not a contract");
    require(gasLimit >= CALL_GAS_MIN, "min gas is 2300");
    require(gasLimit <= CALL_GAS_MAX, "max gas is 5000000");

    id = s_upkeepCount;
    s_upkeep[id] = Upkeep({
      target: target,
      executeGas: gasLimit,
      balance: 0,
      admin: admin,
      maxValidBlocknumber: UINT64_MAX,
      lastKeeper: address(0)
    });
    s_checkData[id] = checkData;
    s_upkeepCount++;

    emit UpkeepRegistered(id, gasLimit, admin);

    return id;
  }

  /**
   * @notice simulated by keepers via eth_call to see if the upkeep needs to be
   * performed. If upkeep is needed, the call then simulates performUpkeep
   * to make sure it succeeds. Finally, it returns the success status along with
   * payment information and the perform data payload.
   * @param id identifier of the upkeep to check
   * @param from the address to simulate performing the upkeep from
   */
  function checkUpkeep(
    uint256 id,
    address from
  )
    external
    override
    whenNotPaused()
    cannotExecute()
    returns (
      bytes memory performData,
      uint256 maxLinkPayment,
      uint256 gasLimit,
      uint256 adjustedGasWei,
      uint256 linkEth
    )
  {
    bytes memory callData = abi.encodeWithSelector(CHECK_SELECTOR, s_checkData[id]);
    (
      bool success,
      bytes memory result
    ) = s_upkeep[id].target.call{gas: s_config.checkGasLimit}(callData);

    if (!success) {
      string memory upkeepRevertReason = getRevertMsg(result);
      string memory reason = string(abi.encodePacked("call to check target failed: ", upkeepRevertReason));
      revert(reason);
    }

    (
      success,
      performData
    ) = abi.decode(result, (bool, bytes));
    require(success, "upkeep not needed");

    PerformParams memory params = generatePerformParams(from, id, performData, false);
    success = performUpkeepWithParams(params);
    require(success, "call to perform upkeep failed");

    return (performData, params.maxLinkPayment, params.gasLimit, params.adjustedGasWei, params.linkEth);
  }


  /**
   * @notice executes the upkeep with the perform data returned from
   * checkUpkeep, validates the keeper's permissions, and pays the keeper.
   * @param id identifier of the upkeep to execute the data with.
   * @param performData calldata parameter to be passed to the target upkeep.
   */
  function performUpkeep(
    uint256 id,
    bytes calldata performData
  )
    external
    override
    returns (
      bool success
    )
  {

    return performUpkeepWithParams(generatePerformParams(
      msg.sender,
      id,
      performData,
      true
    ));
  }

  /**
   * @notice prevent an upkeep from being performed in the future
   * @param id upkeep to be canceled
   */
  function cancelUpkeep(
    uint256 id
  )
    external
    override
  {
    uint64 maxValid = s_upkeep[id].maxValidBlocknumber;
    bool notCanceled = maxValid == UINT64_MAX;
    bool isOwner = msg.sender == owner;
    require(notCanceled || (isOwner && maxValid > block.number), "too late to cancel upkeep");
    require(isOwner || msg.sender == s_upkeep[id].admin, "only owner or admin");

    uint256 height = block.number;
    if (!isOwner) {
      height = height.add(CANCELATION_DELAY);
    }
    s_upkeep[id].maxValidBlocknumber = uint64(height);
    if (notCanceled) {
      s_canceledUpkeepList.push(id);
    }

    emit UpkeepCanceled(id, uint64(height));
  }

  /**
   * @notice adds LINK funding for an upkeep by tranferring from the sender's
   * LINK balance
   * @param id upkeep to fund
   * @param amount number of LINK to transfer
   */
  function addFunds(
    uint256 id,
    uint96 amount
  )
    external
    override
  {
    require(s_upkeep[id].maxValidBlocknumber == UINT64_MAX, "upkeep must be active");
    s_upkeep[id].balance = s_upkeep[id].balance.add(amount);
    s_expectedLinkBalance = s_expectedLinkBalance.add(amount);
    LINK.transferFrom(msg.sender, address(this), amount);
    emit FundsAdded(id, msg.sender, amount);
  }

  /**
   * @notice uses LINK's transferAndCall to LINK and add funding to an upkeep
   * @dev safe to cast uint256 to uint96 as total LINK supply is under UINT96MAX
   * @param sender the account which transferred the funds
   * @param amount number of LINK transfer
   */
  function onTokenTransfer(
    address sender,
    uint256 amount,
    bytes calldata data
  )
    external
  {
    require(msg.sender == address(LINK), "only callable through LINK");
    require(data.length == 32, "data must be 32 bytes");
    uint256 id = abi.decode(data, (uint256));
    require(s_upkeep[id].maxValidBlocknumber == UINT64_MAX, "upkeep must be active");

    s_upkeep[id].balance = s_upkeep[id].balance.add(uint96(amount));
    s_expectedLinkBalance = s_expectedLinkBalance.add(amount);

    emit FundsAdded(id, sender, uint96(amount));
  }

  /**
   * @notice removes funding from a canceled upkeep
   * @param id upkeep to withdraw funds from
   * @param to destination address for sending remaining funds
   */
  function withdrawFunds(
    uint256 id,
    address to
  )
    external
    validateRecipient(to)
  {
    require(s_upkeep[id].admin == msg.sender, "only callable by admin");
    require(s_upkeep[id].maxValidBlocknumber <= block.number, "upkeep must be canceled");

    uint256 amount = s_upkeep[id].balance;
    s_upkeep[id].balance = 0;
    s_expectedLinkBalance = s_expectedLinkBalance.sub(amount);
    emit FundsWithdrawn(id, amount, to);

    LINK.transfer(to, amount);
  }

  /**
   * @notice recovers LINK funds improperly transfered to the registry
   * @dev In principle this function’s execution cost could exceed block
   * gaslimit. However, in our anticipated deployment, the number of upkeeps and
   * keepers will be low enough to avoid this problem.
   */
  function recoverFunds()
    external
    onlyOwner()
  {
    uint256 total = LINK.balanceOf(address(this));
    LINK.transfer(msg.sender, total.sub(s_expectedLinkBalance));
  }

  /**
   * @notice withdraws a keeper's payment, callable only by the keeper's payee
   * @param from keeper address
   * @param to address to send the payment to
   */
  function withdrawPayment(
    address from,
    address to
  )
    external
    validateRecipient(to)
  {
    KeeperInfo memory keeper = s_keeperInfo[from];
    require(keeper.payee == msg.sender, "only callable by payee");

    s_keeperInfo[from].balance = 0;
    s_expectedLinkBalance = s_expectedLinkBalance.sub(keeper.balance);
    emit PaymentWithdrawn(from, keeper.balance, to, msg.sender);

    LINK.transfer(to, keeper.balance);
  }

  /**
   * @notice proposes the safe transfer of a keeper's payee to another address
   * @param keeper address of the keeper to transfer payee role
   * @param proposed address to nominate for next payeeship
   */
  function transferPayeeship(
    address keeper,
    address proposed
  )
    external
  {
    require(s_keeperInfo[keeper].payee == msg.sender, "only callable by payee");
    require(proposed != msg.sender, "cannot transfer to self");

    if (s_proposedPayee[keeper] != proposed) {
      s_proposedPayee[keeper] = proposed;
      emit PayeeshipTransferRequested(keeper, msg.sender, proposed);
    }
  }

  /**
   * @notice accepts the safe transfer of payee role for a keeper
   * @param keeper address to accept the payee role for
   */
  function acceptPayeeship(
    address keeper
  )
    external
  {
    require(s_proposedPayee[keeper] == msg.sender, "only callable by proposed payee");
    address past = s_keeperInfo[keeper].payee;
    s_keeperInfo[keeper].payee = msg.sender;
    s_proposedPayee[keeper] = ZERO_ADDRESS;

    emit PayeeshipTransferred(keeper, past, msg.sender);
  }

  /**
   * @notice signals to keepers that they should not perform upkeeps until the
   * contract has been unpaused
   */
  function pause()
    external
    onlyOwner()
  {
    _pause();
  }

  /**
   * @notice signals to keepers that they can perform upkeeps once again after
   * having been paused
   */
  function unpause()
    external
    onlyOwner()
  {
    _unpause();
  }


  // SETTERS

  /**
   * @notice updates the configuration of the registry
   * @param paymentPremiumPPB payment premium rate oracles receive on top of
   * being reimbursed for gas, measured in parts per billion
   * @param blockCountPerTurn number of blocks an oracle should wait before
   * checking for upkeep
   * @param checkGasLimit gas limit when checking for upkeep
   * @param stalenessSeconds number of seconds that is allowed for feed data to
   * be stale before switching to the fallback pricing
   * @param fallbackGasPrice gas price used if the gas price feed is stale
   * @param fallbackLinkPrice LINK price used if the LINK price feed is stale
   */
  function setConfig(
    uint32 paymentPremiumPPB,
    uint24 blockCountPerTurn,
    uint32 checkGasLimit,
    uint24 stalenessSeconds,
    uint16 gasCeilingMultiplier,
    uint256 fallbackGasPrice,
    uint256 fallbackLinkPrice
  )
    onlyOwner()
    public
  {
    s_config = Config({
      paymentPremiumPPB: paymentPremiumPPB,
      blockCountPerTurn: blockCountPerTurn,
      checkGasLimit: checkGasLimit,
      stalenessSeconds: stalenessSeconds,
      gasCeilingMultiplier: gasCeilingMultiplier
    });
    s_fallbackGasPrice = fallbackGasPrice;
    s_fallbackLinkPrice = fallbackLinkPrice;

    emit ConfigSet(
      paymentPremiumPPB,
      blockCountPerTurn,
      checkGasLimit,
      stalenessSeconds,
      gasCeilingMultiplier,
      fallbackGasPrice,
      fallbackLinkPrice
    );
  }

  /**
   * @notice update the list of keepers allowed to perform upkeep
   * @param keepers list of addresses allowed to perform upkeep
   * @param payees addreses corresponding to keepers who are allowed to
   * move payments which have been accrued
   */
  function setKeepers(
    address[] calldata keepers,
    address[] calldata payees
  )
    external
    onlyOwner()
  {
    require(keepers.length == payees.length, "address lists not the same length");
    require(keepers.length >= 2, "not enough keepers");
    for (uint256 i = 0; i < s_keeperList.length; i++) {
      address keeper = s_keeperList[i];
      s_keeperInfo[keeper].active = false;
    }
    for (uint256 i = 0; i < keepers.length; i++) {
      address keeper = keepers[i];
      KeeperInfo storage s_keeper = s_keeperInfo[keeper];
      address oldPayee = s_keeper.payee;
      address newPayee = payees[i];
      require(newPayee != address(0), "cannot set payee to the zero address");
      require(oldPayee == ZERO_ADDRESS || oldPayee == newPayee || newPayee == IGNORE_ADDRESS, "cannot change payee");
      require(!s_keeper.active, "cannot add keeper twice");
      s_keeper.active = true;
      if (newPayee != IGNORE_ADDRESS) {
        s_keeper.payee = newPayee;
      }
    }
    s_keeperList = keepers;
    emit KeepersUpdated(keepers, payees);
  }

  /**
   * @notice update registrar
   * @param registrar new registrar
   */
  function setRegistrar(
    address registrar
  )
    external
    onlyOwnerOrRegistrar()
  {
    address previous = s_registrar;
    require(registrar != previous, "Same registrar");
    s_registrar = registrar;
    emit RegistrarChanged(previous, registrar);
  }

  // GETTERS

  /**
   * @notice read all of the details about an upkeep
   */
  function getUpkeep(
    uint256 id
  )
    external
    view
    override
    returns (
      address target,
      uint32 executeGas,
      bytes memory checkData,
      uint96 balance,
      address lastKeeper,
      address admin,
      uint64 maxValidBlocknumber
    )
  {
    Upkeep memory reg = s_upkeep[id];
    return (
      reg.target,
      reg.executeGas,
      s_checkData[id],
      reg.balance,
      reg.lastKeeper,
      reg.admin,
      reg.maxValidBlocknumber
    );
  }

  /**
   * @notice read the total number of upkeep's registered
   */
  function getUpkeepCount()
    external
    view
    override
    returns (
      uint256
    )
  {
    return s_upkeepCount;
  }

  /**
   * @notice read the current list canceled upkeep IDs
   */
  function getCanceledUpkeepList()
    external
    view
    override
    returns (
      uint256[] memory
    )
  {
    return s_canceledUpkeepList;
  }

  /**
   * @notice read the current list of addresses allowed to perform upkeep
   */
  function getKeeperList()
    external
    view
    override
    returns (
      address[] memory
    )
  {
    return s_keeperList;
  }

 /**
   * @notice read the current registrar
   */
  function getRegistrar()
    external
    view
    returns (
      address
    )
  {
    return s_registrar;
  }

  /**
   * @notice read the current info about any keeper address
   */
  function getKeeperInfo(
    address query
  )
    external
    view
    override
    returns (
      address payee,
      bool active,
      uint96 balance
    )
  {
    KeeperInfo memory keeper = s_keeperInfo[query];
    return (keeper.payee, keeper.active, keeper.balance);
  }

  /**
   * @notice read the current configuration of the registry
   */
  function getConfig()
    external
    view
    override
    returns (
      uint32 paymentPremiumPPB,
      uint24 blockCountPerTurn,
      uint32 checkGasLimit,
      uint24 stalenessSeconds,
      uint16 gasCeilingMultiplier,
      uint256 fallbackGasPrice,
      uint256 fallbackLinkPrice
    )
  {
    Config memory config = s_config;
    return (
      config.paymentPremiumPPB,
      config.blockCountPerTurn,
      config.checkGasLimit,
      config.stalenessSeconds,
      config.gasCeilingMultiplier,
      s_fallbackGasPrice,
      s_fallbackLinkPrice
    );
  }

  /**
   * @notice calculates the minimum balance required for an upkeep to remain eligible
   */
  function getMinBalanceForUpkeep(
    uint256 id
  )
    external
    view
    returns (
      uint96 minBalance
    )
  {
    return getMaxPaymentForGas(s_upkeep[id].executeGas);
  }

  /**
   * @notice calculates the maximum payment for a given gas limit
   */
  function getMaxPaymentForGas(
    uint256 gasLimit
  )
    public
    view
    returns (
      uint96 maxPayment
    )
  {
    (uint256 gasWei, uint256 linkEth) = getFeedData();
    uint256 adjustedGasWei = adjustGasPrice(gasWei, false);
    return calculatePaymentAmount(gasLimit, adjustedGasWei, linkEth);
  }


  // PRIVATE

  /**
   * @dev retrieves feed data for fast gas/eth and link/eth prices. if the feed
   * data is stale it uses the configured fallback price. Once a price is picked
   * for gas it takes the min of gas price in the transaction or the fast gas
   * price in order to reduce costs for the upkeep clients.
   */
  function getFeedData()
    private
    view
    returns (
      uint256 gasWei,
      uint256 linkEth
    )
  {
    uint32 stalenessSeconds = s_config.stalenessSeconds;
    bool staleFallback = stalenessSeconds > 0;
    uint256 timestamp;
    int256 feedValue;
    (,feedValue,,timestamp,) = FAST_GAS_FEED.latestRoundData();
    if (staleFallback && stalenessSeconds < block.timestamp - timestamp || feedValue <=0) {
      gasWei = s_fallbackGasPrice;
    } else {
      gasWei = uint256(feedValue);
    }
    (,feedValue,,timestamp,) = LINK_ETH_FEED.latestRoundData();
    if (staleFallback && stalenessSeconds < block.timestamp - timestamp || feedValue <=0) {
      linkEth = s_fallbackLinkPrice;
    } else {
      linkEth = uint256(feedValue);
    }
    return (gasWei, linkEth);
  }

  /**
   * @dev calculates LINK paid for gas spent plus a configure premium percentage
   */
  function calculatePaymentAmount(
    uint256 gasLimit,
    uint256 gasWei,
    uint256 linkEth
  )
    private
    view
    returns (
      uint96 payment
    )
  {
    uint256 weiForGas = gasWei.mul(gasLimit.add(REGISTRY_GAS_OVERHEAD));
    uint256 premium = PPB_BASE.add(s_config.paymentPremiumPPB);
    uint256 total = weiForGas.mul(1e9).mul(premium).div(linkEth);
    require(total <= LINK_TOTAL_SUPPLY, "payment greater than all LINK");
    return uint96(total); // LINK_TOTAL_SUPPLY < UINT96_MAX
  }

  /**
   * @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
    )
  {
    assembly{
      let g := gas()
      // Compute g -= CUSHION and check for underflow
      if lt(g, CUSHION) { revert(0, 0) }
      g := sub(g, CUSHION)
      // 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
      success := call(gasAmount, target, 0, add(data, 0x20), mload(data), 0, 0)
    }
    return success;
  }

  /**
   * @dev calls the Upkeep target with the performData param passed in by the
   * keeper and the exact gas required by the Upkeep
   */
  function performUpkeepWithParams(
    PerformParams memory params
  )
    private
    nonReentrant()
    validUpkeep(params.id)
    returns (
      bool success
    )
  {
    require(s_keeperInfo[params.from].active, "only active keepers");
    Upkeep memory upkeep = s_upkeep[params.id];
    require(upkeep.balance >= params.maxLinkPayment, "insufficient funds");
    require(upkeep.lastKeeper != params.from, "keepers must take turns");

    uint256  gasUsed = gasleft();
    bytes memory callData = abi.encodeWithSelector(PERFORM_SELECTOR, params.performData);
    success = callWithExactGas(params.gasLimit, upkeep.target, callData);
    gasUsed = gasUsed - gasleft();

    uint96 payment = calculatePaymentAmount(gasUsed, params.adjustedGasWei, params.linkEth);
    upkeep.balance = upkeep.balance.sub(payment);
    upkeep.lastKeeper = params.from;
    s_upkeep[params.id] = upkeep;
    uint96 newBalance = s_keeperInfo[params.from].balance.add(payment);
    s_keeperInfo[params.from].balance = newBalance;

    emit UpkeepPerformed(
      params.id,
      success,
      params.from,
      payment,
      params.performData
    );
    return success;
  }

  /**
   * @dev ensures a upkeep is valid
   */
  function validateUpkeep(
    uint256 id
  )
    private
    view
  {
    require(s_upkeep[id].maxValidBlocknumber > block.number, "invalid upkeep id");
  }

  /**
   * @dev adjusts the gas price to min(ceiling, tx.gasprice) or just uses the ceiling if tx.gasprice is disabled
   */
  function adjustGasPrice(
    uint256 gasWei,
    bool useTxGasPrice
  )
    private
    view
    returns(uint256 adjustedPrice)
  {
    adjustedPrice = gasWei.mul(s_config.gasCeilingMultiplier);
    if (useTxGasPrice && tx.gasprice < adjustedPrice) {
      adjustedPrice = tx.gasprice;
    }
  }

  /**
   * @dev generates a PerformParams struct for use in performUpkeepWithParams()
   */
  function generatePerformParams(
    address from,
    uint256 id,
    bytes memory performData,
    bool useTxGasPrice
  )
    private
    view
    returns(PerformParams memory)
  {
    uint256 gasLimit = s_upkeep[id].executeGas;
    (uint256 gasWei, uint256 linkEth) = getFeedData();
    uint256 adjustedGasWei = adjustGasPrice(gasWei, useTxGasPrice);
    uint96 maxLinkPayment = calculatePaymentAmount(gasLimit, adjustedGasWei, linkEth);

    return PerformParams({
      from: from,
      id: id,
      performData: performData,
      maxLinkPayment: maxLinkPayment,
      gasLimit: gasLimit,
      adjustedGasWei: adjustedGasWei,
      linkEth: linkEth
    });
  }

  /**
   * @dev extracts a revert reason from a call result payload
   */
  function getRevertMsg(bytes memory _payload) private pure returns (string memory) {
    if (_payload.length < 68) return 'transaction reverted silently';
    assembly {
        _payload := add(_payload, 0x04)
    }
    return abi.decode(_payload, (string));
  }

  // MODIFIERS

  /**
   * @dev ensures a upkeep is valid
   */
  modifier validUpkeep(
    uint256 id
  ) {
    validateUpkeep(id);
    _;
  }

  /**
   * @dev ensures that burns don't accidentally happen by sending to the zero
   * address
   */
  modifier validateRecipient(
    address to
  ) {
    require(to != address(0), "cannot send to zero address");
    _;
  }

    /**
   * @dev Reverts if called by anyone other than the contract owner or registrar.
   */
  modifier onlyOwnerOrRegistrar() {
    require(msg.sender == owner || msg.sender == s_registrar, "Only callable by owner or registrar");
    _;
  }

}

File 3 of 18 : AggregatorV3Interface.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0;

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
    );

}

File 4 of 18 : LinkTokenInterface.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

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);
}

File 5 of 18 : SafeMathChainlink.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMathChainlink {
  /**
    * @dev Returns the addition of two unsigned integers, reverting on
    * overflow.
    *
    * Counterpart to Solidity's `+` operator.
    *
    * Requirements:
    * - Addition cannot overflow.
    */
  function add(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a + b;
    require(c >= a, "SafeMath: addition overflow");

    return c;
  }

  /**
    * @dev Returns the subtraction of two unsigned integers, reverting on
    * overflow (when the result is negative).
    *
    * Counterpart to Solidity's `-` operator.
    *
    * Requirements:
    * - Subtraction cannot overflow.
    */
  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    require(b <= a, "SafeMath: subtraction overflow");
    uint256 c = a - b;

    return c;
  }

  /**
    * @dev Returns the multiplication of two unsigned integers, reverting on
    * overflow.
    *
    * Counterpart to Solidity's `*` operator.
    *
    * Requirements:
    * - Multiplication cannot overflow.
    */
  function mul(uint256 a, uint256 b) internal pure returns (uint256) {
    // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
    // benefit is lost if 'b' is also tested.
    // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
    if (a == 0) {
      return 0;
    }

    uint256 c = a * b;
    require(c / a == b, "SafeMath: multiplication overflow");

    return c;
  }

  /**
    * @dev Returns the integer division of two unsigned integers. Reverts on
    * division by zero. The result is rounded towards zero.
    *
    * Counterpart to Solidity's `/` operator. Note: this function uses a
    * `revert` opcode (which leaves remaining gas untouched) while Solidity
    * uses an invalid opcode to revert (consuming all remaining gas).
    *
    * Requirements:
    * - The divisor cannot be zero.
    */
  function div(uint256 a, uint256 b) internal pure returns (uint256) {
    // Solidity only automatically asserts when dividing by 0
    require(b > 0, "SafeMath: division by zero");
    uint256 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold

    return c;
  }

  /**
    * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
    * Reverts when dividing by zero.
    *
    * Counterpart to Solidity's `%` operator. This function uses a `revert`
    * opcode (which leaves remaining gas untouched) while Solidity uses an
    * invalid opcode to revert (consuming all remaining gas).
    *
    * Requirements:
    * - The divisor cannot be zero.
    */
  function mod(uint256 a, uint256 b) internal pure returns (uint256) {
    require(b != 0, "SafeMath: modulo by zero");
    return a % b;
  }
}

File 6 of 18 : Owned.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/**
 * @title The Owned contract
 * @notice A contract with helpers for basic contract ownership.
 */
contract Owned {

  address public owner;
  address private pendingOwner;

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

  constructor() {
    owner = msg.sender;
  }

  /**
   * @dev Allows an owner to begin transferring ownership to a new address,
   * pending.
   */
  function transferOwnership(address _to)
    external
    onlyOwner()
  {
    pendingOwner = _to;

    emit OwnershipTransferRequested(owner, _to);
  }

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

    address oldOwner = owner;
    owner = msg.sender;
    pendingOwner = address(0);

    emit OwnershipTransferred(oldOwner, msg.sender);
  }

  /**
   * @dev Reverts if called by anyone other than the contract owner.
   */
  modifier onlyOwner() {
    require(msg.sender == owner, "Only callable by owner");
    _;
  }

}

File 7 of 18 : Address.sol
// SPDX-License-Identifier: MIT
// github.com/OpenZeppelin/[email protected]

pragma solidity >=0.6.2 <0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 8 of 18 : Pausable.sol
// SPDX-License-Identifier: MIT
// github.com/OpenZeppelin/[email protected]

pragma solidity >=0.6.0 <0.8.0;

import "./Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor () {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        require(!paused(), "Pausable: paused");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        require(paused(), "Pausable: not paused");
        _;
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

File 9 of 18 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// github.com/OpenZeppelin/[email protected]

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor () {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

File 10 of 18 : SignedSafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @title SignedSafeMath
 * @dev Signed math operations with safety checks that revert on error.
 */
library SignedSafeMath {
    int256 constant private _INT256_MIN = -2**255;

    /**
     * @dev Returns the multiplication of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(int256 a, int256 b) internal pure returns (int256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        require(!(a == -1 && b == _INT256_MIN), "SignedSafeMath: multiplication overflow");

        int256 c = a * b;
        require(c / a == b, "SignedSafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two signed integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(int256 a, int256 b) internal pure returns (int256) {
        require(b != 0, "SignedSafeMath: division by zero");
        require(!(b == -1 && a == _INT256_MIN), "SignedSafeMath: division overflow");

        int256 c = a / b;

        return c;
    }

    /**
     * @dev Returns the subtraction of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a - b;
        require((b >= 0 && c <= a) || (b < 0 && c > a), "SignedSafeMath: subtraction overflow");

        return c;
    }

    /**
     * @dev Returns the addition of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a + b;
        require((b >= 0 && c >= a) || (b < 0 && c < a), "SignedSafeMath: addition overflow");

        return c;
    }
}

File 11 of 18 : SafeMath96.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * This library is a version of Open Zeppelin's SafeMath, modified to support
 * unsigned 96 bit integers.
 */
library SafeMath96 {
  /**
    * @dev Returns the addition of two unsigned integers, reverting on
    * overflow.
    *
    * Counterpart to Solidity's `+` operator.
    *
    * Requirements:
    * - Addition cannot overflow.
    */
  function add(uint96 a, uint96 b) internal pure returns (uint96) {
    uint96 c = a + b;
    require(c >= a, "SafeMath: addition overflow");

    return c;
  }

  /**
    * @dev Returns the subtraction of two unsigned integers, reverting on
    * overflow (when the result is negative).
    *
    * Counterpart to Solidity's `-` operator.
    *
    * Requirements:
    * - Subtraction cannot overflow.
    */
  function sub(uint96 a, uint96 b) internal pure returns (uint96) {
    require(b <= a, "SafeMath: subtraction overflow");
    uint96 c = a - b;

    return c;
  }

  /**
    * @dev Returns the multiplication of two unsigned integers, reverting on
    * overflow.
    *
    * Counterpart to Solidity's `*` operator.
    *
    * Requirements:
    * - Multiplication cannot overflow.
    */
  function mul(uint96 a, uint96 b) internal pure returns (uint96) {
    // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
    // benefit is lost if 'b' is also tested.
    // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
    if (a == 0) {
      return 0;
    }

    uint96 c = a * b;
    require(c / a == b, "SafeMath: multiplication overflow");

    return c;
  }

  /**
    * @dev Returns the integer division of two unsigned integers. Reverts on
    * division by zero. The result is rounded towards zero.
    *
    * Counterpart to Solidity's `/` operator. Note: this function uses a
    * `revert` opcode (which leaves remaining gas untouched) while Solidity
    * uses an invalid opcode to revert (consuming all remaining gas).
    *
    * Requirements:
    * - The divisor cannot be zero.
    */
  function div(uint96 a, uint96 b) internal pure returns (uint96) {
    // Solidity only automatically asserts when dividing by 0
    require(b > 0, "SafeMath: division by zero");
    uint96 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold

    return c;
  }

  /**
    * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
    * Reverts when dividing by zero.
    *
    * Counterpart to Solidity's `%` operator. This function uses a `revert`
    * opcode (which leaves remaining gas untouched) while Solidity uses an
    * invalid opcode to revert (consuming all remaining gas).
    *
    * Requirements:
    * - The divisor cannot be zero.
    */
  function mod(uint96 a, uint96 b) internal pure returns (uint96) {
    require(b != 0, "SafeMath: modulo by zero");
    return a % b;
  }
}

File 12 of 18 : KeeperCompatibleInterface.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

interface KeeperCompatibleInterface {

  /**
   * @notice method that is simulated by the keepers to see if any work actually
   * needs to be performed. This method does does not actually need to be
   * executable, and since it is only ever simulated it can consume lots of gas.
   * @dev To ensure that it is never called, you may want to add the
   * cannotExecute modifier from KeeperBase to your implementation of this
   * method.
   * @param checkData specified in the upkeep registration so it is always the
   * same for a registered upkeep. This can easilly be broken down into specific
   * arguments using `abi.decode`, so multiple upkeeps can be registered on the
   * same contract and easily differentiated by the contract.
   * @return upkeepNeeded boolean to indicate whether the keeper should call
   * performUpkeep or not.
   * @return performData bytes that the keeper should call performUpkeep with, if
   * upkeep is needed. If you would like to encode data to decode later, try
   * `abi.encode`.
   */
  function checkUpkeep(
    bytes calldata checkData
  )
    external
    returns (
      bool upkeepNeeded,
      bytes memory performData
    );
  /**
   * @notice method that is actually executed by the keepers, via the registry.
   * The data returned by the checkUpkeep simulation will be passed into
   * this method to actually be executed.
   * @dev The input to this method should not be trusted, and the caller of the
   * method should not even be restricted to any single registry. Anyone should
   * be able call it, and the input should be validated, there is no guarantee
   * that the data passed in is the performData returned from checkUpkeep. This
   * could happen due to malicious keepers, racing keepers, or simply a state
   * change while the performUpkeep transaction is waiting for confirmation.
   * Always validate the data passed in.
   * @param performData is the data which was passed back from the checkData
   * simulation. If it is encoded, it can easily be decoded into other types by
   * calling `abi.decode`. This data should not be trusted, and should be
   * validated against the contract's current state.
   */
  function performUpkeep(
    bytes calldata performData
  ) external;
}

File 13 of 18 : KeeperRegistryInterface.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

interface KeeperRegistryBaseInterface {
  function registerUpkeep(
    address target,
    uint32 gasLimit,
    address admin,
    bytes calldata checkData
  ) external returns (
      uint256 id
    );
  function performUpkeep(
    uint256 id,
    bytes calldata performData
  ) external returns (
      bool success
    );
  function cancelUpkeep(
    uint256 id
  ) external;
  function addFunds(
    uint256 id,
    uint96 amount
  ) external;

  function getUpkeep(uint256 id)
    external view returns (
      address target,
      uint32 executeGas,
      bytes memory checkData,
      uint96 balance,
      address lastKeeper,
      address admin,
      uint64 maxValidBlocknumber
    );
  function getUpkeepCount()
    external view returns (uint256);
  function getCanceledUpkeepList()
    external view returns (uint256[] memory);
  function getKeeperList()
    external view returns (address[] memory);
  function getKeeperInfo(address query)
    external view returns (
      address payee,
      bool active,
      uint96 balance
    );
  function getConfig()
    external view returns (
      uint32 paymentPremiumPPB,
      uint24 checkFrequencyBlocks,
      uint32 checkGasLimit,
      uint24 stalenessSeconds,
      uint16 gasCeilingMultiplier,
      uint256 fallbackGasPrice,
      uint256 fallbackLinkPrice
    );
}

/**
  * @dev The view methods are not actually marked as view in the implementation
  * but we want them to be easily queried off-chain. Solidity will not compile
  * if we actually inherrit from this interface, so we document it here.
  */
interface KeeperRegistryInterface is KeeperRegistryBaseInterface {
  function checkUpkeep(
    uint256 upkeepId,
    address from
  )
    external
    view
    returns (
      bytes memory performData,
      uint256 maxLinkPayment,
      uint256 gasLimit,
      int256 gasWei,
      int256 linkEth
    );
}

interface KeeperRegistryExecutableInterface is KeeperRegistryBaseInterface {
  function checkUpkeep(
    uint256 upkeepId,
    address from
  )
    external
    returns (
      bytes memory performData,
      uint256 maxLinkPayment,
      uint256 gasLimit,
      uint256 adjustedGasWei,
      uint256 linkEth
    );
}

File 14 of 18 : Context.sol
// SPDX-License-Identifier: MIT
// github.com/OpenZeppelin/[email protected]

pragma solidity >=0.6.0 <0.8.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

File 15 of 18 : UpkeepRegistrationRequests.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

import "@chainlink/contracts/src/v0.7/interfaces/LinkTokenInterface.sol";
import "./vendor/Owned.sol";
import "./KeeperRegistryInterface.sol";
import "./SafeMath96.sol";

/**
 * @notice Contract to accept requests for upkeep registrations
 * @dev There are 2 registration workflows in this contract
 * Flow 1. auto approve OFF / manual registration - UI calls `register` function on this contract, this contract owner at a later time then manually
 *  calls `approve` to register upkeep and emit events to inform UI and others interested.
 * Flow 2. auto approve ON / real time registration - UI calls `register` function as before, which calls the `registerUpkeep` function directly on
 *  keeper registry and then emits approved event to finish the flow automatically without manual intervention.
 * The idea is to have same interface(functions,events) for UI or anyone using this contract irrespective of auto approve being enabled or not.
 * they can just listen to `RegistrationRequested` & `RegistrationApproved` events and know the status on registrations.
 */
contract UpkeepRegistrationRequests is Owned {
    using SafeMath96 for uint96;

    bytes4 private constant REGISTER_REQUEST_SELECTOR = this.register.selector;

    uint256 private s_minLINKJuels;
    mapping(bytes32 => PendingRequest) private s_pendingRequests;

    LinkTokenInterface public immutable LINK;

    struct AutoApprovedConfig {
        bool enabled;
        uint16 allowedPerWindow;
        uint32 windowSizeInBlocks;
        uint64 windowStart;
        uint16 approvedInCurrentWindow;
    }

    struct PendingRequest {
        address admin;
        uint96 balance;
    }

    AutoApprovedConfig private s_config;
    KeeperRegistryBaseInterface private s_keeperRegistry;

    event RegistrationRequested(
        bytes32 indexed hash,
        string name,
        bytes encryptedEmail,
        address indexed upkeepContract,
        uint32 gasLimit,
        address adminAddress,
        bytes checkData,
        uint96 amount,
        uint8 indexed source
    );

    event RegistrationApproved(
        bytes32 indexed hash,
        string displayName,
        uint256 indexed upkeepId
    );

    event RegistrationRejected(
        bytes32 indexed hash
    );

    event ConfigChanged(
        bool enabled,
        uint32 windowSizeInBlocks,
        uint16 allowedPerWindow,
        address keeperRegistry,
        uint256 minLINKJuels
    );

    constructor(
        address LINKAddress,
        uint256 minimumLINKJuels
    ) {
        LINK = LinkTokenInterface(LINKAddress);
        s_minLINKJuels = minimumLINKJuels;
    }

    //EXTERNAL

    /**
     * @notice register can only be called through transferAndCall on LINK contract
     * @param name string of the upkeep to be registered
     * @param encryptedEmail email address of upkeep contact
     * @param upkeepContract address to peform upkeep on
     * @param gasLimit amount of gas to provide the target contract when performing upkeep
     * @param adminAddress address to cancel upkeep and withdraw remaining funds
     * @param checkData data passed to the contract when checking for upkeep
     * @param amount quantity of LINK upkeep is funded with (specified in Juels)
     * @param source application sending this request
     */
    function register(
        string memory name,
        bytes calldata encryptedEmail,
        address upkeepContract,
        uint32 gasLimit,
        address adminAddress,
        bytes calldata checkData,
        uint96 amount,
        uint8 source
    )
      external
      onlyLINK()
    {
        require(adminAddress != address(0), "invalid admin address");
        bytes32 hash = keccak256(abi.encode(upkeepContract, gasLimit, adminAddress, checkData));

        emit RegistrationRequested(
            hash,
            name,
            encryptedEmail,
            upkeepContract,
            gasLimit,
            adminAddress,
            checkData,
            amount,
            source
        );

        AutoApprovedConfig memory config = s_config;
        if (config.enabled && _underApprovalLimit(config)) {
            _incrementApprovedCount(config);

            _approve(
                name,
                upkeepContract,
                gasLimit,
                adminAddress,
                checkData,
                amount,
                hash
            );
        } else {
            uint96 newBalance = s_pendingRequests[hash].balance.add(amount);
            s_pendingRequests[hash] = PendingRequest({
                admin: adminAddress,
                balance: newBalance
            });
        }
    }

    /**
     * @dev register upkeep on KeeperRegistry contract and emit RegistrationApproved event
     */
    function approve(
        string memory name,
        address upkeepContract,
        uint32 gasLimit,
        address adminAddress,
        bytes calldata checkData,
        bytes32 hash
    )
      external
      onlyOwner()
    {
        PendingRequest memory request = s_pendingRequests[hash];
        require(request.admin != address(0), "request not found");
        bytes32 expectedHash = keccak256(abi.encode(upkeepContract, gasLimit, adminAddress, checkData));
        require(hash == expectedHash, "hash and payload do not match");
        delete s_pendingRequests[hash];
        _approve(
            name,
            upkeepContract,
            gasLimit,
            adminAddress,
            checkData,
            request.balance,
            hash
        );
    }

    /**
     * @notice cancel will remove a registration request and return the refunds to the msg.sender
     * @param hash the request hash
     */
    function cancel(
        bytes32 hash
    )
      external
    {
        PendingRequest memory request = s_pendingRequests[hash];
        require(msg.sender == request.admin || msg.sender == owner, "only admin / owner can cancel");
        require(request.admin != address(0), "request not found");
        delete s_pendingRequests[hash];
        require(LINK.transfer(msg.sender, request.balance), "LINK token transfer failed");
        emit RegistrationRejected(hash);
    }

    /**
     * @notice owner calls this function to set if registration requests should be sent directly to the Keeper Registry
     * @param enabled setting for autoapprove registrations
     * @param windowSizeInBlocks window size defined in number of blocks
     * @param allowedPerWindow number of registrations that can be auto approved in above window
     * @param keeperRegistry new keeper registry address
     */
    function setRegistrationConfig(
        bool enabled,
        uint32 windowSizeInBlocks,
        uint16 allowedPerWindow,
        address keeperRegistry,
        uint256 minLINKJuels
    )
      external
      onlyOwner()
    {
        s_config = AutoApprovedConfig({
            enabled: enabled,
            allowedPerWindow: allowedPerWindow,
            windowSizeInBlocks: windowSizeInBlocks,
            windowStart: 0,
            approvedInCurrentWindow: 0
        });
        s_minLINKJuels = minLINKJuels;
        s_keeperRegistry = KeeperRegistryBaseInterface(keeperRegistry);

        emit ConfigChanged(
          enabled,
          windowSizeInBlocks,
          allowedPerWindow,
          keeperRegistry,
          minLINKJuels
        );
    }

    /**
     * @notice read the current registration configuration
     */
    function getRegistrationConfig()
        external
        view
        returns (
            bool enabled,
            uint32 windowSizeInBlocks,
            uint16 allowedPerWindow,
            address keeperRegistry,
            uint256 minLINKJuels,
            uint64 windowStart,
            uint16 approvedInCurrentWindow
        )
    {
        AutoApprovedConfig memory config = s_config;
        return (
            config.enabled,
            config.windowSizeInBlocks,
            config.allowedPerWindow,
            address(s_keeperRegistry),
            s_minLINKJuels,
            config.windowStart,
            config.approvedInCurrentWindow
        );
    }

    /**
     * @notice gets the admin address and the current balance of a registration request
     */
    function getPendingRequest(bytes32 hash) external view returns(address, uint96) {
        PendingRequest memory request = s_pendingRequests[hash];
        return (request.admin, request.balance);
    }

    /**
     * @notice Called when LINK is sent to the contract via `transferAndCall`
     * @param amount Amount of LINK sent (specified in Juels)
     * @param data Payload of the transaction
     */
    function onTokenTransfer(
        address, /* sender */
        uint256 amount,
        bytes calldata data
    )
      external
      onlyLINK()
      permittedFunctionsForLINK(data)
      isActualAmount(amount, data)
    {
        require(amount >= s_minLINKJuels, "Insufficient payment");
        (bool success, ) = address(this).delegatecall(data); // calls register
        require(success, "Unable to create request");
    }

    //PRIVATE

    /**
     * @dev reset auto approve window if passed end of current window
     */
    function _resetWindowIfRequired(
        AutoApprovedConfig memory config
    )
      private
    {
        uint64 blocksPassed = uint64(block.number - config.windowStart);
        if (blocksPassed >= config.windowSizeInBlocks) {
            config.windowStart = uint64(block.number);
            config.approvedInCurrentWindow = 0;
            s_config = config;
        }
    }

    /**
     * @dev register upkeep on KeeperRegistry contract and emit RegistrationApproved event
     */
    function _approve(
        string memory name,
        address upkeepContract,
        uint32 gasLimit,
        address adminAddress,
        bytes calldata checkData,
        uint96 amount,
        bytes32 hash
    )
      private
    {
        KeeperRegistryBaseInterface keeperRegistry = s_keeperRegistry;

        // register upkeep
        uint256 upkeepId = keeperRegistry.registerUpkeep(
            upkeepContract,
            gasLimit,
            adminAddress,
            checkData
        );
        // fund upkeep
        bool success = LINK.transferAndCall(
          address(keeperRegistry),
          amount,
          abi.encode(upkeepId)
        );
        require(success, "failed to fund upkeep");

        emit RegistrationApproved(hash, name, upkeepId);
    }

    /**
     * @dev determine approval limits and check if in range
     */
    function _underApprovalLimit(
      AutoApprovedConfig memory config
    )
      private
      returns (bool)
    {
        _resetWindowIfRequired(config);
        if (config.approvedInCurrentWindow < config.allowedPerWindow) {
            return true;
        }
        return false;
    }

    /**
     * @dev record new latest approved count
     */
    function _incrementApprovedCount(
      AutoApprovedConfig memory config
    )
      private
    {
        config.approvedInCurrentWindow++;
        s_config = config;
    }

    //MODIFIERS

    /**
     * @dev Reverts if not sent from the LINK token
     */
    modifier onlyLINK() {
        require(msg.sender == address(LINK), "Must use LINK token");
        _;
    }

    /**
     * @dev Reverts if the given data does not begin with the `register` function selector
     * @param _data The data payload of the request
     */
    modifier permittedFunctionsForLINK(
        bytes memory _data
    ) {
        bytes4 funcSelector;
        assembly {
            // solhint-disable-next-line avoid-low-level-calls
            funcSelector := mload(add(_data, 32))
        }
        require(
            funcSelector == REGISTER_REQUEST_SELECTOR,
            "Must use whitelisted functions"
        );
        _;
    }

   /**
   * @dev Reverts if the actual amount passed does not match the expected amount
   * @param expected amount that should match the actual amount
   * @param data bytes
   */
  modifier isActualAmount(
    uint256 expected,
    bytes memory data
  ) {
      uint256 actual;
      assembly{
          actual := mload(add(data, 228))
      }
      require(expected == actual, "Amount mismatch");
      _;
  }
}

File 16 of 18 : KeeperCompatible.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

import './KeeperBase.sol';
import './KeeperCompatibleInterface.sol';

abstract contract KeeperCompatible is KeeperBase, KeeperCompatibleInterface {}

File 17 of 18 : UpkeepReverter.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

import '../KeeperCompatible.sol';

contract UpkeepReverter is KeeperCompatible {

  function checkUpkeep(bytes calldata data)
    public
    view
    override
    cannotExecute()
    returns (
      bool callable,
      bytes calldata executedata
    )
  {
    require(false, "!working");
    return (true, data);
  }

  function performUpkeep(
    bytes calldata
  )
    external
    pure
    override
  {
    require(false, "!working");
  }

}

File 18 of 18 : UpkeepMock.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

import '../KeeperCompatible.sol';

contract UpkeepMock is KeeperCompatible {
  bool public canCheck;
  bool public canPerform;
  uint256 public checkGasToBurn;
  uint256 public performGasToBurn;

  uint256 constant gasBuffer = 1000; // use all but this amount in gas burn loops

  event UpkeepPerformedWith(bytes upkeepData);

  function setCanCheck(bool value)
    public
  {
    canCheck = value;
  }

  function setCanPerform(bool value)
    public
  {
    canPerform = value;
  }

  function setCheckGasToBurn(uint256 value)
    public
  {
    require(value > gasBuffer || value == 0, "checkGasToBurn must be 0 (disabled) or greater than buffer");
    checkGasToBurn = value - gasBuffer;
  }

  function setPerformGasToBurn(uint256 value)
    public
  {
    require(value > gasBuffer || value == 0, "performGasToBurn must be 0 (disabled) or greater than buffer");
    performGasToBurn = value - gasBuffer;
  }

  function checkUpkeep(bytes calldata data)
    external
    override
    cannotExecute()
    returns (
      bool callable,
      bytes calldata executedata
    )
  {
    uint256 startGas = gasleft();
    bool couldCheck = canCheck;

    setCanCheck(false); // test that state modifcations don't stick

    while (startGas - gasleft() < checkGasToBurn) {} // burn gas

    return (couldCheck, data);
  }

  function performUpkeep(
    bytes calldata data
  )
    external
    override
  {
    uint256 startGas = gasleft();

    require(canPerform, "Cannot perform");

    setCanPerform(false);

    emit UpkeepPerformedWith(data);

    while(startGas - gasleft() < performGasToBurn) {} // burn gas
  }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  }
}

Contract ABI

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","type":"address"}],"name":"UpkeepRegistered","type":"event"},{"inputs":[],"name":"FAST_GAS_FEED","outputs":[{"internalType":"contract AggregatorV3Interface","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":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"keeper","type":"address"}],"name":"acceptPayeeship","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint96","name":"amount","type":"uint96"}],"name":"addFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"cancelUpkeep","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"address","name":"from","type":"address"}],"name":"checkUpkeep","outputs":[{"internalType":"bytes","name":"performData","type":"bytes"},{"internalType":"uint256","name":"maxLinkPayment","type":"uint256"},{"internalType":"uint256","name":"gasLimit","type":"uint256"},{"internalType":"uint256","name":"adjustedGasWei","type":"uint256"},{"internalType":"uint256","name":"linkEth","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getCanceledUpkeepList","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getConfig","outputs":[{"internalType":"uint32","name":"paymentPremiumPPB","type":"uint32"},{"internalType":"uint24","name":"blockCountPerTurn","type":"uint24"},{"internalType":"uint32","name":"checkGasLimit","type":"uint32"},{"internalType":"uint24","name":"stalenessSeconds","type":"uint24"},{"internalType":"uint16","name":"gasCeilingMultiplier","type":"uint16"},{"internalType":"uint256","name":"fallbackGasPrice","type":"uint256"},{"internalType":"uint256","name":"fallbackLinkPrice","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"query","type":"address"}],"name":"getKeeperInfo","outputs":[{"internalType":"address","name":"payee","type":"address"},{"internalType":"bool","name":"active","type":"bool"},{"internalType":"uint96","name":"balance","type":"uint96"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getKeeperList","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"gasLimit","type":"uint256"}],"name":"getMaxPaymentForGas","outputs":[{"internalType":"uint96","name":"maxPayment","type":"uint96"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"getMinBalanceForUpkeep","outputs":[{"internalType":"uint96","name":"minBalance","type":"uint96"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getRegistrar","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"getUpkeep","outputs":[{"internalType":"address","name":"target","type":"address"},{"internalType":"uint32","name":"executeGas","type":"uint32"},{"internalType":"bytes","name":"checkData","type":"bytes"},{"internalType":"uint96","name":"balance","type":"uint96"},{"internalType":"address","name":"lastKeeper","type":"address"},{"internalType":"address","name":"admin","type":"address"},{"internalType":"uint64","name":"maxValidBlocknumber","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getUpkeepCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"onTokenTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"bytes","name":"performData","type":"bytes"}],"name":"performUpkeep","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"recoverFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"target","type":"address"},{"internalType":"uint32","name":"gasLimit","type":"uint32"},{"internalType":"address","name":"admin","type":"address"},{"internalType":"bytes","name":"checkData","type":"bytes"}],"name":"registerUpkeep","outputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"paymentPremiumPPB","type":"uint32"},{"internalType":"uint24","name":"blockCountPerTurn","type":"uint24"},{"internalType":"uint32","name":"checkGasLimit","type":"uint32"},{"internalType":"uint24","name":"stalenessSeconds","type":"uint24"},{"internalType":"uint16","name":"gasCeilingMultiplier","type":"uint16"},{"internalType":"uint256","name":"fallbackGasPrice","type":"uint256"},{"internalType":"uint256","name":"fallbackLinkPrice","type":"uint256"}],"name":"setConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"keepers","type":"address[]"},{"internalType":"address[]","name":"payees","type":"address[]"}],"name":"setKeepers","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"registrar","type":"address"}],"name":"setRegistrar","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"keeper","type":"address"},{"internalType":"address","name":"proposed","type":"address"}],"name":"transferPayeeship","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"withdrawFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"}],"name":"withdrawPayment","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

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

-----Decoded View---------------
Arg [0] : link (address): 0x326c977e6efc84e512bb9c30f76e30c160ed06fb
Arg [1] : linkEthFeed (address): 0x12162c3e810393dec01362abf156d7ecf6159528
Arg [2] : fastGasFeed (address): 0x095bf5dbe28535b9eac32f1ecd6784ef1c15d756
Arg [3] : paymentPremiumPPB (uint32): 200000000
Arg [4] : blockCountPerTurn (uint24): 20
Arg [5] : checkGasLimit (uint32): 6500000
Arg [6] : stalenessSeconds (uint24): 90000
Arg [7] : gasCeilingMultiplier (uint16): 3
Arg [8] : fallbackGasPrice (uint256): 200000000000
Arg [9] : fallbackLinkPrice (uint256): 20000000000000000

-----Encoded View---------------
10 Constructor Arguments found :
Arg [0] : 000000000000000000000000326c977e6efc84e512bb9c30f76e30c160ed06fb
Arg [1] : 00000000000000000000000012162c3e810393dec01362abf156d7ecf6159528
Arg [2] : 000000000000000000000000095bf5dbe28535b9eac32f1ecd6784ef1c15d756
Arg [3] : 000000000000000000000000000000000000000000000000000000000bebc200
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000014
Arg [5] : 0000000000000000000000000000000000000000000000000000000000632ea0
Arg [6] : 0000000000000000000000000000000000000000000000000000000000015f90
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [8] : 0000000000000000000000000000000000000000000000000000002e90edd000
Arg [9] : 00000000000000000000000000000000000000000000000000470de4df820000


Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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