Contract 0xF5a3d443FccD7eE567000E43B23b0e98d96445CE 8

 
Txn Hash
Method
Block
From
To
Value
0xd5081004bfb659e68083ef02b94d2fe50968bda4473ca7b6ae75f4c80d2c5dc7Fulfill Oracle R...153238852022-08-12 0:33:0914 hrs 57 mins ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00282533 20.‍53850575
0x05442cf2edb4129ca7f84bd88fdb02003927505b97fd542ce714b43ed5b631d0Fulfill Oracle R...153175742022-08-11 0:33:401 day 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00185246 13.‍46627056
0x9575c1b6c62744554b7b44535e58986782f4614eb91e59aa80277337679f09ddFulfill Oracle R...153112152022-08-10 0:33:372 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00142639 9.‍76650652
0x65adfc8ab64efbf620a6c64925d8daa8b783184b0377f5a42b0dc3d82ca302ddFulfill Oracle R...153048362022-08-09 0:33:043 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00296203 22.‍59322215
0x53a5f9e7a5966612f46a6b22c12b873a3d5c2958ec283a9c0e4351ded956fe0fFulfill Oracle R...152984522022-08-08 0:33:074 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00107117 7.‍78678602
0x2ff7ba6bd9f2e924903c5824c605588f1d6e4fd6d2aa3e9829090f63bebfe877Fulfill Oracle R...152920192022-08-07 0:33:335 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00082162 4.‍49900509
0xdc8380b03f0c40d4a30552400667195df72844dcecee1f9f3896ba78c803cc5fFulfill Oracle R...152856102022-08-06 0:34:286 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00168644 11.‍54707175
0xb35c542c8e19af1d635377125f90593428f19ef50b5e4e4731a6d6e36f1a05d3Fulfill Oracle R...152790962022-08-05 0:33:097 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00103243 7.‍06904751
0x45436da6e514a926747553fdc6baf5451febe6af4122e1594655daad1bbb276dFulfill Oracle R...152727112022-08-04 0:33:228 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00156728 8.‍58125518
0x43838c08df275014a589a8b4546825d82b600fc27fa73354bcff0362c2d922f5Fulfill Oracle R...152663302022-08-03 0:33:109 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00267408 14.‍64401488
0xf7eb3063b93a032dffaa93762f7a1fbd045e3268ecd716c3f2c337ce99d9ce45Fulfill Oracle R...152599082022-08-02 0:33:0710 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00141184 10.‍76897581
0x62a0076b8aa164707a958852e7710458d59026e45fac7053115a200d2cc8ced1Fulfill Oracle R...152584192022-08-01 19:01:3210 days 20 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍01015448 69.‍52749019
0x04d06a1a5d4f441689de83813b3d3d1dabb7fd8ae4876fc8c3a0dcdbbc3ac275Fulfill Oracle R...152534342022-08-01 0:33:1511 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00252024 13.‍80016781
0x4a4748c138484bf39190ce3431c640fe846702fc860112bade494a5cfea0d588Fulfill Oracle R...152470422022-07-31 0:34:0112 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00109585 8.‍35873062
0x58fb6bf015e32bc83cd37e505a20e4272deca40e9114de3b25abf7153b7dc6edFulfill Oracle R...152406312022-07-30 0:33:2913 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00163497 11.‍19460054
0x3ab4d7754fb6374051b3086192922f1a37958a3d747fdf5db6001a870c434f31Fulfill Oracle R...152342222022-07-29 0:33:0514 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00125635 9.‍13295583
0x380789d5d4961d8cc65fd698f040579a30016d1b483ec570093a5a0b1991fe4dFulfill Oracle R...152277582022-07-28 0:33:0815 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00340156 23.‍29042106
0x78cb60ff590f0ab55379b492266877401c9a5c64ec9dc75ac03908d10c8eced6Fulfill Oracle R...152213572022-07-27 0:33:2116 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00129592 7.‍09643836
0x4f2fecddf2738e236461f9978b5124247204a6c664006941a8a388bb7409b0b5Fulfill Oracle R...152149522022-07-26 0:33:1217 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00732674 53.‍26566364
0x2dbd2780070a7a66e17be7c89ddaec73724b0fd8fa25d2b20d5221aac84062abFulfill Oracle R...152085462022-07-25 0:33:1018 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00212634 14.‍55898686
0xe1f74b51d00d1e46e352d89ecbb5e82dbb376d3b77d1f2b345ecd64b9f13b516Fulfill Oracle R...152021732022-07-24 0:33:3519 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00086424 6.‍28306449
0x9f4d2f99e7033472e006a6d0ea47afc0a51145f20e3dbadde2be19594d4cc678Fulfill Oracle R...151957072022-07-23 0:33:1120 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00137904 9.‍4423071
0xe7e2bca44d284ce13433393813c7498945e9b5a5e66a7c44a48d8533c93cd204Fulfill Oracle R...151892342022-07-22 0:33:3921 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00309651 23.‍62114237
0x665cf1e6443639f9985694cfbdf09b13d35ff495b02349463e04c6073f1d9bb5Fulfill Oracle R...151827652022-07-21 0:33:3022 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍0029744 20.‍36567045
0x91ac3f6c7d07ba50f2ab144f7161cebebbceadc1ba81c9033d72b953fae23c77Fulfill Oracle R...151763222022-07-20 0:33:3723 days 14 hrs ago0x0699a397c3cf614c9a7db23a4be28fc4c8f3a755 IN  0xf5a3d443fccd7ee567000e43b23b0e98d96445ce0 Ether0.‍00091238 32.‍97844981
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x049bd8c3adc3fe7d3fc2a44541d955a537c2a484

Contract Name:
Oracle

Compiler Version
v0.4.24+commit.e67f0147

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2019-05-17
*/

// File: openzeppelin-solidity/contracts/ownership/Ownable.sol

pragma solidity ^0.4.24;


/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
  address public owner;


  event OwnershipRenounced(address indexed previousOwner);
  event OwnershipTransferred(
    address indexed previousOwner,
    address indexed newOwner
  );


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  constructor() public {
    owner = msg.sender;
  }

  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }

  /**
   * @dev Allows the current owner to relinquish control of the contract.
   * @notice Renouncing to ownership will leave the contract without an owner.
   * It will not be possible to call the functions with the `onlyOwner`
   * modifier anymore.
   */
  function renounceOwnership() public onlyOwner {
    emit OwnershipRenounced(owner);
    owner = address(0);
  }

  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param _newOwner The address to transfer ownership to.
   */
  function transferOwnership(address _newOwner) public onlyOwner {
    _transferOwnership(_newOwner);
  }

  /**
   * @dev Transfers control of the contract to a newOwner.
   * @param _newOwner The address to transfer ownership to.
   */
  function _transferOwnership(address _newOwner) internal {
    require(_newOwner != address(0));
    emit OwnershipTransferred(owner, _newOwner);
    owner = _newOwner;
  }
}

// File: openzeppelin-solidity/contracts/math/SafeMath.sol

pragma solidity ^0.4.24;


/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
    // Gas optimization: this is cheaper than asserting '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;
    }

    c = _a * _b;
    assert(c / _a == _b);
    return c;
  }

  /**
  * @dev Integer division of two numbers, truncating the quotient.
  */
  function div(uint256 _a, uint256 _b) internal pure returns (uint256) {
    // assert(_b > 0); // Solidity automatically throws when dividing by 0
    // uint256 c = _a / _b;
    // assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold
    return _a / _b;
  }

  /**
  * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
    assert(_b <= _a);
    return _a - _b;
  }

  /**
  * @dev Adds two numbers, throws on overflow.
  */
  function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
    c = _a + _b;
    assert(c >= _a);
    return c;
  }
}

// File: contracts/interfaces/ChainlinkRequestInterface.sol

pragma solidity 0.4.24;

interface ChainlinkRequestInterface {
  function oracleRequest(
    address sender,
    uint256 payment,
    bytes32 id,
    address callbackAddress,
    bytes4 callbackFunctionId,
    uint256 nonce,
    uint256 version,
    bytes data
  ) external;

  function cancelOracleRequest(
    bytes32 requestId,
    uint256 payment,
    bytes4 callbackFunctionId,
    uint256 expiration
  ) external;
}

// File: contracts/interfaces/OracleInterface.sol

pragma solidity 0.4.24;

interface OracleInterface {
  function fulfillOracleRequest(
    bytes32 requestId,
    uint256 payment,
    address callbackAddress,
    bytes4 callbackFunctionId,
    uint256 expiration,
    bytes32 data
  ) external returns (bool);
  function getAuthorizationStatus(address node) external view returns (bool);
  function setFulfillmentPermission(address node, bool allowed) external;
  function withdraw(address recipient, uint256 amount) external;
  function withdrawable() external view returns (uint256);
}

// File: contracts/interfaces/LinkTokenInterface.sol

pragma solidity 0.4.24;

interface LinkTokenInterface {
  function allowance(address owner, address spender) external returns (bool success);
  function approve(address spender, uint256 value) external returns (bool success);
  function balanceOf(address owner) external returns (uint256 balance);
  function decimals() external returns (uint8 decimalPlaces);
  function decreaseApproval(address spender, uint256 addedValue) external returns (bool success);
  function increaseApproval(address spender, uint256 subtractedValue) external;
  function name() external returns (string tokenName);
  function symbol() external returns (string tokenSymbol);
  function totalSupply() external returns (uint256 totalTokensIssued);
  function transfer(address to, uint256 value) external returns (bool success);
  function transferAndCall(address to, uint256 value, bytes data) external returns (bool success);
  function transferFrom(address from, address to, uint256 value) external returns (bool success);
}

// File: contracts/Oracle.sol

pragma solidity 0.4.24;






/**
 * @title The Chainlink Oracle contract
 * @notice Node operators can deploy this contract to fulfill requests sent to them
 */
contract Oracle is ChainlinkRequestInterface, OracleInterface, Ownable {
  using SafeMath for uint256;

  uint256 constant public EXPIRY_TIME = 5 minutes;
  uint256 constant private MINIMUM_CONSUMER_GAS_LIMIT = 400000;
  // We initialize fields to 1 instead of 0 so that the first invocation
  // does not cost more gas.
  uint256 constant private ONE_FOR_CONSISTENT_GAS_COST = 1;
  uint256 constant private SELECTOR_LENGTH = 4;
  uint256 constant private EXPECTED_REQUEST_WORDS = 2;
  // solium-disable-next-line zeppelin/no-arithmetic-operations
  uint256 constant private MINIMUM_REQUEST_LENGTH = SELECTOR_LENGTH + (32 * EXPECTED_REQUEST_WORDS);

  LinkTokenInterface internal LinkToken;
  mapping(bytes32 => bytes32) private commitments;
  mapping(address => bool) private authorizedNodes;
  uint256 private withdrawableTokens = ONE_FOR_CONSISTENT_GAS_COST;

  event OracleRequest(
    bytes32 indexed specId,
    address requester,
    bytes32 requestId,
    uint256 payment,
    address callbackAddr,
    bytes4 callbackFunctionId,
    uint256 cancelExpiration,
    uint256 dataVersion,
    bytes data
  );

  event CancelOracleRequest(
    bytes32 indexed requestId
  );

  /**
   * @notice Deploy with the address of the LINK token
   * @dev Sets the LinkToken address for the imported LinkTokenInterface
   * @param _link The address of the LINK token
   */
  constructor(address _link) Ownable() public {
    LinkToken = LinkTokenInterface(_link);
  }

  /**
   * @notice Called when LINK is sent to the contract via `transferAndCall`
   * @dev The data payload's first 2 words will be overwritten by the `_sender` and `_amount`
   * values to ensure correctness. Calls oracleRequest.
   * @param _sender Address of the sender
   * @param _amount Amount of LINK sent (specified in wei)
   * @param _data Payload of the transaction
   */
  function onTokenTransfer(
    address _sender,
    uint256 _amount,
    bytes _data
  )
    public
    onlyLINK
    validRequestLength(_data)
    permittedFunctionsForLINK(_data)
  {
    assembly {
      // solium-disable-next-line security/no-low-level-calls
      mstore(add(_data, 36), _sender) // ensure correct sender is passed
      // solium-disable-next-line security/no-low-level-calls
      mstore(add(_data, 68), _amount)    // ensure correct amount is passed
    }
    // solium-disable-next-line security/no-low-level-calls
    require(address(this).delegatecall(_data), "Unable to create request"); // calls oracleRequest
  }

  /**
   * @notice Creates the Chainlink request
   * @dev Stores the hash of the params as the on-chain commitment for the request.
   * Emits OracleRequest event for the Chainlink node to detect.
   * @param _sender The sender of the request
   * @param _payment The amount of payment given (specified in wei)
   * @param _specId The Job Specification ID
   * @param _callbackAddress The callback address for the response
   * @param _callbackFunctionId The callback function ID for the response
   * @param _nonce The nonce sent by the requester
   * @param _dataVersion The specified data version
   * @param _data The CBOR payload of the request
   */
  function oracleRequest(
    address _sender,
    uint256 _payment,
    bytes32 _specId,
    address _callbackAddress,
    bytes4 _callbackFunctionId,
    uint256 _nonce,
    uint256 _dataVersion,
    bytes _data
  )
    external
    onlyLINK
    checkCallbackAddress(_callbackAddress)
  {
    bytes32 requestId = keccak256(abi.encodePacked(_sender, _nonce));
    require(commitments[requestId] == 0, "Must use a unique ID");
    uint256 expiration = now.add(EXPIRY_TIME);

    commitments[requestId] = keccak256(
      abi.encodePacked(
        _payment,
        _callbackAddress,
        _callbackFunctionId,
        expiration
      )
    );

    emit OracleRequest(
      _specId,
      _sender,
      requestId,
      _payment,
      _callbackAddress,
      _callbackFunctionId,
      expiration,
      _dataVersion,
      _data);
  }

  /**
   * @notice Called by the Chainlink node to fulfill requests
   * @dev Given params must hash back to the commitment stored from `oracleRequest`.
   * Will call the callback address' callback function without bubbling up error
   * checking in a `require` so that the node can get paid.
   * @param _requestId The fulfillment request ID that must match the requester's
   * @param _payment The payment amount that will be released for the oracle (specified in wei)
   * @param _callbackAddress The callback address to call for fulfillment
   * @param _callbackFunctionId The callback function ID to use for fulfillment
   * @param _expiration The expiration that the node should respond by before the requester can cancel
   * @param _data The data to return to the consuming contract
   * @return Status if the external call was successful
   */
  function fulfillOracleRequest(
    bytes32 _requestId,
    uint256 _payment,
    address _callbackAddress,
    bytes4 _callbackFunctionId,
    uint256 _expiration,
    bytes32 _data
  )
    external
    onlyAuthorizedNode
    isValidRequest(_requestId)
    returns (bool)
  {
    bytes32 paramsHash = keccak256(
      abi.encodePacked(
        _payment,
        _callbackAddress,
        _callbackFunctionId,
        _expiration
      )
    );
    require(commitments[_requestId] == paramsHash, "Params do not match request ID");
    withdrawableTokens = withdrawableTokens.add(_payment);
    delete commitments[_requestId];
    require(gasleft() >= MINIMUM_CONSUMER_GAS_LIMIT, "Must provide consumer enough gas");
    // All updates to the oracle's fulfillment should come before calling the
    // callback(addr+functionId) as it is untrusted.
    // See: https://solidity.readthedocs.io/en/develop/security-considerations.html#use-the-checks-effects-interactions-pattern
    return _callbackAddress.call(_callbackFunctionId, _requestId, _data); // solium-disable-line security/no-low-level-calls
  }

  /**
   * @notice Use this to check if a node is authorized for fulfilling requests
   * @param _node The address of the Chainlink node
   * @return The authorization status of the node
   */
  function getAuthorizationStatus(address _node) external view returns (bool) {
    return authorizedNodes[_node];
  }

  /**
   * @notice Sets the fulfillment permission for a given node. Use `true` to allow, `false` to disallow.
   * @param _node The address of the Chainlink node
   * @param _allowed Bool value to determine if the node can fulfill requests
   */
  function setFulfillmentPermission(address _node, bool _allowed) external onlyOwner {
    authorizedNodes[_node] = _allowed;
  }

  /**
   * @notice Allows the node operator to withdraw earned LINK to a given address
   * @dev The owner of the contract can be another wallet and does not have to be a Chainlink node
   * @param _recipient The address to send the LINK token to
   * @param _amount The amount to send (specified in wei)
   */
  function withdraw(address _recipient, uint256 _amount)
    external
    onlyOwner
    hasAvailableFunds(_amount)
  {
    withdrawableTokens = withdrawableTokens.sub(_amount);
    assert(LinkToken.transfer(_recipient, _amount));
  }

  /**
   * @notice Displays the amount of LINK that is available for the node operator to withdraw
   * @dev We use `ONE_FOR_CONSISTENT_GAS_COST` in place of 0 in storage
   * @return The amount of withdrawable LINK on the contract
   */
  function withdrawable() external view onlyOwner returns (uint256) {
    return withdrawableTokens.sub(ONE_FOR_CONSISTENT_GAS_COST);
  }

  /**
   * @notice Allows requesters to cancel requests sent to this oracle contract. Will transfer the LINK
   * sent for the request back to the requester's address.
   * @dev Given params must hash to a commitment stored on the contract in order for the request to be valid
   * Emits CancelOracleRequest event.
   * @param _requestId The request ID
   * @param _payment The amount of payment given (specified in wei)
   * @param _callbackFunc The requester's specified callback address
   * @param _expiration The time of the expiration for the request
   */
  function cancelOracleRequest(
    bytes32 _requestId,
    uint256 _payment,
    bytes4 _callbackFunc,
    uint256 _expiration
  ) external {
    bytes32 paramsHash = keccak256(
      abi.encodePacked(
        _payment,
        msg.sender,
        _callbackFunc,
        _expiration)
    );
    require(paramsHash == commitments[_requestId], "Params do not match request ID");
    require(_expiration <= now, "Request is not expired");

    delete commitments[_requestId];
    emit CancelOracleRequest(_requestId);

    assert(LinkToken.transfer(msg.sender, _payment));
  }

  // MODIFIERS

  /**
   * @dev Reverts if amount requested is greater than withdrawable balance
   * @param _amount The given amount to compare to `withdrawableTokens`
   */
  modifier hasAvailableFunds(uint256 _amount) {
    require(withdrawableTokens >= _amount.add(ONE_FOR_CONSISTENT_GAS_COST), "Amount requested is greater than withdrawable balance");
    _;
  }

  /**
   * @dev Reverts if request ID does not exist
   * @param _requestId The given request ID to check in stored `commitments`
   */
  modifier isValidRequest(bytes32 _requestId) {
    require(commitments[_requestId] != 0, "Must have a valid requestId");
    _;
  }

  /**
   * @dev Reverts if `msg.sender` is not authorized to fulfill requests
   */
  modifier onlyAuthorizedNode() {
    require(authorizedNodes[msg.sender] || msg.sender == owner, "Not an authorized node to fulfill requests");
    _;
  }

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

  /**
   * @dev Reverts if the given data does not begin with the `oracleRequest` function selector
   * @param _data The data payload of the request
   */
  modifier permittedFunctionsForLINK(bytes _data) {
    bytes4 funcSelector;
    assembly {
      // solium-disable-next-line security/no-low-level-calls
      funcSelector := mload(add(_data, 32))
    }
    require(funcSelector == this.oracleRequest.selector, "Must use whitelisted functions");
    _;
  }

  /**
   * @dev Reverts if the callback address is the LINK token
   * @param _to The callback address
   */
  modifier checkCallbackAddress(address _to) {
    require(_to != address(LinkToken), "Cannot callback to LINK");
    _;
  }

  /**
   * @dev Reverts if the given payload is less than needed to create a request
   * @param _data The request payload
   */
  modifier validRequestLength(bytes _data) {
    require(_data.length >= MINIMUM_REQUEST_LENGTH, "Invalid request length");
    _;
  }

}

Contract Security Audit

Contract ABI

[{"constant":false,"inputs":[{"name":"_sender","type":"address"},{"name":"_payment","type":"uint256"},{"name":"_specId","type":"bytes32"},{"name":"_callbackAddress","type":"address"},{"name":"_callbackFunctionId","type":"bytes4"},{"name":"_nonce","type":"uint256"},{"name":"_dataVersion","type":"uint256"},{"name":"_data","type":"bytes"}],"name":"oracleRequest","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_requestId","type":"bytes32"},{"name":"_payment","type":"uint256"},{"name":"_callbackAddress","type":"address"},{"name":"_callbackFunctionId","type":"bytes4"},{"name":"_expiration","type":"uint256"},{"name":"_data","type":"bytes32"}],"name":"fulfillOracleRequest","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"EXPIRY_TIME","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"withdrawable","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_requestId","type":"bytes32"},{"name":"_payment","type":"uint256"},{"name":"_callbackFunc","type":"bytes4"},{"name":"_expiration","type":"uint256"}],"name":"cancelOracleRequest","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"renounceOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_node","type":"address"},{"name":"_allowed","type":"bool"}],"name":"setFulfillmentPermission","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_sender","type":"address"},{"name":"_amount","type":"uint256"},{"name":"_data","type":"bytes"}],"name":"onTokenTransfer","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_node","type":"address"}],"name":"getAuthorizationStatus","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_recipient","type":"address"},{"name":"_amount","type":"uint256"}],"name":"withdraw","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"_link","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"specId","type":"bytes32"},{"indexed":false,"name":"requester","type":"address"},{"indexed":false,"name":"requestId","type":"bytes32"},{"indexed":false,"name":"payment","type":"uint256"},{"indexed":false,"name":"callbackAddr","type":"address"},{"indexed":false,"name":"callbackFunctionId","type":"bytes4"},{"indexed":false,"name":"cancelExpiration","type":"uint256"},{"indexed":false,"name":"dataVersion","type":"uint256"},{"indexed":false,"name":"data","type":"bytes"}],"name":"OracleRequest","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"requestId","type":"bytes32"}],"name":"CancelOracleRequest","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"previousOwner","type":"address"}],"name":"OwnershipRenounced","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"previousOwner","type":"address"},{"indexed":true,"name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"}]

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Swarm Source

bzzr://b665cef74ed35e0e8ba95e80400a1e06066d1f84e86da3f3a2e170ba94db04b0
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.