Contract 0x66d61A0bF1dF619C215c39de71562dc16D2F4833

Contract Overview

Balance:
0 Ether

Token:
Txn Hash
Method
Block
From
To
Value
0x1a5a2130d5b2169d6dc14699839b1cd666c4568aacad135df33933b167d84b2cFulfill Oracle R...102655862022-03-03 18:23:30125 days 20 mins ago0xd573a6f74907b212f5334c96cdb52bdaef653926 IN  0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether0.000065341.50000002
0x47cfc32695a9b906d652a75009102bef50aab8de65ea43b95b4e08aefb4e23c2Fulfill Oracle R...102655792022-03-03 18:21:45125 days 22 mins ago0xd573a6f74907b212f5334c96cdb52bdaef653926 IN  0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether0.000065361.50000002
0x6332f17dd6242ac838af9cd202fa1375d7fa704cc40ced94e2d78b50c8664999Fulfill Oracle R...102478352022-02-28 16:17:10128 days 2 hrs ago0xd573a6f74907b212f5334c96cdb52bdaef653926 IN  0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether0.000103141.7
0xaf850e08ec81fec472767bc3c26b3c187e96e7670de58939396d135f15480d56Fulfill Oracle R...102377162022-02-26 22:02:33129 days 20 hrs ago0xd573a6f74907b212f5334c96cdb52bdaef653926 IN  0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether0.000121352
0x98d35a9fa1ed83e5ebc18c41016fe3cfc9d87b3704e41dea34e7589517745a59Fulfill Oracle R...102008482022-02-20 12:00:42136 days 6 hrs ago0xd573a6f74907b212f5334c96cdb52bdaef653926 IN  0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether0.000105662.42500003
0x767df7a8ad1d00f492c83fca87b103bb4637646abaf31400a52d65b1125eed0aFulfill Oracle R...102008392022-02-20 11:58:27136 days 6 hrs ago0xd573a6f74907b212f5334c96cdb52bdaef653926 IN  0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether0.000323547.42500001
0x938c38a18e9068120683bc601fb1c998e5ab05896ee6a705686eccfeeddc295dFulfill Oracle R...102008312022-02-20 11:56:27136 days 6 hrs ago0xd573a6f74907b212f5334c96cdb52bdaef653926 IN  0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether0.000412596.80000001
0x5794ce039ddab465b576911c6223c733fda98a3162c3259cb1cd090cccabfd9aSet Fulfillment ...102007562022-02-20 11:37:39136 days 7 hrs ago0xb00191a90d70674a619ac7f9d00543180e64c3ad IN  0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether0.00011581 2.50000001
0x9a29b65ba5ce8dc45669774621e4b59c492fa7cabaf3ba43bf040d02683e01740x60806040102007382022-02-20 11:33:08136 days 7 hrs ago0xb00191a90d70674a619ac7f9d00543180e64c3ad IN  Contract Creation0 Ether0.00431866 2.50000001
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Latest 25 internal transaction
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0x1a5a2130d5b2169d6dc14699839b1cd666c4568aacad135df33933b167d84b2c102655862022-03-03 18:23:30125 days 20 mins ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x74661101ade06dc68a869a2bb064e1271032cd440 Ether
0x045d06f3bda4ed4896c312e24c938ebe5b713964554a2af7214c4b166bb67ed4102655852022-03-03 18:23:15125 days 20 mins ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0x045d06f3bda4ed4896c312e24c938ebe5b713964554a2af7214c4b166bb67ed4102655852022-03-03 18:23:15125 days 20 mins ago 0x01be23585060835e02b77ef475b0cc51aa1e0709 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0x47cfc32695a9b906d652a75009102bef50aab8de65ea43b95b4e08aefb4e23c2102655792022-03-03 18:21:45125 days 22 mins ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x74661101ade06dc68a869a2bb064e1271032cd440 Ether
0xbb2875cbc89e8de759b005b177de249e9a29b57e372785d2f184ca0fa64d7661102655782022-03-03 18:21:30125 days 22 mins ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0xbb2875cbc89e8de759b005b177de249e9a29b57e372785d2f184ca0fa64d7661102655782022-03-03 18:21:30125 days 22 mins ago 0x01be23585060835e02b77ef475b0cc51aa1e0709 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0x6332f17dd6242ac838af9cd202fa1375d7fa704cc40ced94e2d78b50c8664999102478352022-02-28 16:17:10128 days 2 hrs ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x74661101ade06dc68a869a2bb064e1271032cd440 Ether
0x497cc00331588ae82215a533c822a9e1e73109d35d5cc9cdb27fbd9444243c71102478342022-02-28 16:16:55128 days 2 hrs ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0x497cc00331588ae82215a533c822a9e1e73109d35d5cc9cdb27fbd9444243c71102478342022-02-28 16:16:55128 days 2 hrs ago 0x01be23585060835e02b77ef475b0cc51aa1e0709 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0xaf850e08ec81fec472767bc3c26b3c187e96e7670de58939396d135f15480d56102377162022-02-26 22:02:33129 days 20 hrs ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0xe80d4c1620cf0bde5d4d9613a485042b2c4a9cb00 Ether
0xf8dc2f396c60ab24b24da523a7b29994402a5e948836604c0fff1dae98430eb3102377142022-02-26 22:02:03129 days 20 hrs ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0xf8dc2f396c60ab24b24da523a7b29994402a5e948836604c0fff1dae98430eb3102377142022-02-26 22:02:03129 days 20 hrs ago 0x01be23585060835e02b77ef475b0cc51aa1e0709 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0x98d35a9fa1ed83e5ebc18c41016fe3cfc9d87b3704e41dea34e7589517745a59102008482022-02-20 12:00:42136 days 6 hrs ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x42c4b9d72e822e8706f849d10b41dfae7a4cfa360 Ether
0x46576a9851a2379b46873e6f6deafb3f7f776e2aa4854e7333cd92d5a869edac102008462022-02-20 12:00:12136 days 6 hrs ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0x46576a9851a2379b46873e6f6deafb3f7f776e2aa4854e7333cd92d5a869edac102008462022-02-20 12:00:12136 days 6 hrs ago 0x01be23585060835e02b77ef475b0cc51aa1e0709 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0x767df7a8ad1d00f492c83fca87b103bb4637646abaf31400a52d65b1125eed0a102008392022-02-20 11:58:27136 days 6 hrs ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x42c4b9d72e822e8706f849d10b41dfae7a4cfa360 Ether
0x026699b90008285a783d2ec6d2a0b2302b3f044a1bd7df033f6306ac020dcabf102008372022-02-20 11:57:57136 days 6 hrs ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0x026699b90008285a783d2ec6d2a0b2302b3f044a1bd7df033f6306ac020dcabf102008372022-02-20 11:57:57136 days 6 hrs ago 0x01be23585060835e02b77ef475b0cc51aa1e0709 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0xc581b910a46a642e9510ba7b7fdd39a582ee06dcf78d987f19ae6770d7c0feaf102008342022-02-20 11:57:12136 days 6 hrs ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0xc581b910a46a642e9510ba7b7fdd39a582ee06dcf78d987f19ae6770d7c0feaf102008342022-02-20 11:57:12136 days 6 hrs ago 0x01be23585060835e02b77ef475b0cc51aa1e0709 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0x938c38a18e9068120683bc601fb1c998e5ab05896ee6a705686eccfeeddc295d102008312022-02-20 11:56:27136 days 6 hrs ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x42c4b9d72e822e8706f849d10b41dfae7a4cfa360 Ether
0xc4acb3418d01582b9fac587dcf9b037828cf61ad3768b1b0a3d28f9a45dc3139102008252022-02-20 11:54:57136 days 6 hrs ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0xc4acb3418d01582b9fac587dcf9b037828cf61ad3768b1b0a3d28f9a45dc3139102008252022-02-20 11:54:57136 days 6 hrs ago 0x01be23585060835e02b77ef475b0cc51aa1e0709 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0x3ca5465ccd239ea9a53ec93523e9572b7052d6333904a2839bf5e92773e78c54102008132022-02-20 11:51:57136 days 6 hrs ago 0x66d61a0bf1df619c215c39de71562dc16d2f4833 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
0x3ca5465ccd239ea9a53ec93523e9572b7052d6333904a2839bf5e92773e78c54102008132022-02-20 11:51:57136 days 6 hrs ago 0x01be23585060835e02b77ef475b0cc51aa1e0709 0x66d61a0bf1df619c215c39de71562dc16d2f48330 Ether
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0xa5cd108f18b527bf343e334b298e54ebcc097bb8

Contract Name:
Oracle

Compiler Version
v0.6.6+commit.6c089d02

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2021-12-17
*/

// File: @chainlink/contracts/src/v0.6/vendor/SafeMathChainlink.sol


pragma solidity ^0.6.0;

/**
 * @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: @chainlink/contracts/src/v0.6/vendor/Ownable.sol


pragma solidity ^0.6.0;

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be aplied to your functions to restrict their use to
 * the owner.
 *
 * This contract has been modified to remove the revokeOwnership function
 */
contract Ownable {
  address private _owner;

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

  /**
   * @dev Initializes the contract setting the deployer as the initial owner.
   */
  constructor () internal {
    _owner = msg.sender;
    emit OwnershipTransferred(address(0), _owner);
  }

  /**
   * @dev Returns the address of the current owner.
   */
  function owner() public view returns (address) {
    return _owner;
  }

  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    require(isOwner(), "Ownable: caller is not the owner");
    _;
  }

  /**
   * @dev Returns true if the caller is the current owner.
   */
  function isOwner() public view returns (bool) {
    return msg.sender == _owner;
  }

  /**
   * @dev Transfers ownership of the contract to a new account (`newOwner`).
   * Can only be called by the current owner.
   */
  function transferOwnership(address newOwner) public onlyOwner {
    _transferOwnership(newOwner);
  }

  /**
   * @dev Transfers ownership of the contract to a new account (`newOwner`).
   */
  function _transferOwnership(address newOwner) internal {
    require(newOwner != address(0), "Ownable: new owner is the zero address");
    emit OwnershipTransferred(_owner, newOwner);
    _owner = newOwner;
  }
}

// File: @chainlink/contracts/src/v0.6/interfaces/WithdrawalInterface.sol


pragma solidity ^0.6.0;

interface WithdrawalInterface {
  /**
   * @notice transfer LINK held by the contract belonging to msg.sender to
   * another address
   * @param recipient is the address to send the LINK to
   * @param amount is the amount of LINK to send
   */
  function withdraw(address recipient, uint256 amount) external;

  /**
   * @notice query the available amount of LINK to withdraw by msg.sender
   */
  function withdrawable() external view returns (uint256);
}

// File: @chainlink/contracts/src/v0.6/interfaces/LinkTokenInterface.sol


pragma solidity ^0.6.0;

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: @chainlink/contracts/src/v0.6/interfaces/OracleInterface.sol


pragma solidity ^0.6.0;

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: @chainlink/contracts/src/v0.6/interfaces/ChainlinkRequestInterface.sol


pragma solidity ^0.6.0;

interface ChainlinkRequestInterface {
  function oracleRequest(
    address sender,
    uint256 requestPrice,
    bytes32 serviceAgreementID,
    address callbackAddress,
    bytes4 callbackFunctionId,
    uint256 nonce,
    uint256 dataVersion,
    bytes calldata data
  ) external;

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

// File: @chainlink/contracts/src/v0.6/LinkTokenReceiver.sol


pragma solidity ^0.6.0;

abstract contract LinkTokenReceiver {

  bytes4 constant private ORACLE_REQUEST_SELECTOR = 0x40429946;
  uint256 constant private SELECTOR_LENGTH = 4;
  uint256 constant private EXPECTED_REQUEST_WORDS = 2;
  uint256 constant private MINIMUM_REQUEST_LENGTH = SELECTOR_LENGTH + (32 * EXPECTED_REQUEST_WORDS);
  /**
   * @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 memory _data
  )
    public
    onlyLINK
    validRequestLength(_data)
    permittedFunctionsForLINK(_data)
  {
    assembly {
      // solhint-disable-next-line avoid-low-level-calls
      mstore(add(_data, 36), _sender) // ensure correct sender is passed
      // solhint-disable-next-line avoid-low-level-calls
      mstore(add(_data, 68), _amount)    // ensure correct amount is passed
    }
    // solhint-disable-next-line avoid-low-level-calls
    (bool success, ) = address(this).delegatecall(_data); // calls oracleRequest
    require(success, "Unable to create request");
  }

  function getChainlinkToken() public view virtual returns (address);

  /**
   * @dev Reverts if not sent from the LINK token
   */
  modifier onlyLINK() {
    require(msg.sender == getChainlinkToken(), "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 memory _data) {
    bytes4 funcSelector;
    assembly {
      // solhint-disable-next-line avoid-low-level-calls
      funcSelector := mload(add(_data, 32))
    }
    require(funcSelector == ORACLE_REQUEST_SELECTOR, "Must use whitelisted functions");
    _;
  }

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

// File: @chainlink/contracts/src/v0.6/Oracle.sol


pragma solidity 0.6.6;








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

  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)
    public
    Ownable()
  {
    LinkToken = LinkTokenInterface(_link); // external but already deployed and unalterable
  }

  /**
   * @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 calldata _data
  )
    external
    override
    onlyLINK()
    checkCallbackAddress(_callbackAddress)
  {
    bytes32 requestId = keccak256(abi.encodePacked(_sender, _nonce));
    require(commitments[requestId] == 0, "Must use a unique ID");
    // solhint-disable-next-line not-rely-on-time
    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
    override
    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
    (bool success, ) = _callbackAddress.call(abi.encodeWithSelector(_callbackFunctionId, _requestId, _data)); // solhint-disable-line avoid-low-level-calls
    return success;
  }

  /**
   * @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
    override
    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
    override
    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
    override(OracleInterface, WithdrawalInterface)
    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
    override(OracleInterface, WithdrawalInterface)
    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
    override
  {
    bytes32 paramsHash = keccak256(
      abi.encodePacked(
        _payment,
        msg.sender,
        _callbackFunc,
        _expiration)
    );
    require(paramsHash == commitments[_requestId], "Params do not match request ID");
    // solhint-disable-next-line not-rely-on-time
    require(_expiration <= now, "Request is not expired");

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

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

  /**
   * @notice Returns the address of the LINK token
   * @dev This is the public implementation for chainlinkTokenAddress, which is
   * an internal method of the ChainlinkClient contract
   */
  function getChainlinkToken()
    public
    view
    override
    returns (address)
  {
    return address(LinkToken);
  }

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

}

// File: docs.chain.link/samples/NodeOperators/Oracle.sol


pragma solidity 0.6.6;

Contract ABI

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Swarm Source

ipfs://302f4ffff7d7f1b5956f3df4d8e5f6b3be0a6237b21145ce2f7afd9c341446af
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.