CRO Price: $0.14 (+7.61%)

Contract

0xc907C2a4A550E2dAce0181D36d2f5fEE799A2dd3

Overview

CRO Balance

Cronos Chain LogoCronos Chain LogoCronos Chain Logo0 CRO

CRO Value

$0.00

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Update Price176642622025-01-14 16:11:4615 mins ago1736871106IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176639432025-01-14 15:41:4345 mins ago1736869303IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176636262025-01-14 15:11:491 hr ago1736867509IN
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0 CRO0.405287545,002.5
Update Price176633072025-01-14 14:41:471 hr ago1736865707IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176629892025-01-14 14:11:452 hrs ago1736863905IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176626712025-01-14 13:41:452 hrs ago1736862105IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176623532025-01-14 13:11:453 hrs ago1736860305IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176620352025-01-14 12:41:483 hrs ago1736858508IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176617172025-01-14 12:11:484 hrs ago1736856708IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176613992025-01-14 11:41:494 hrs ago1736854909IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176610812025-01-14 11:11:485 hrs ago1736853108IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176607632025-01-14 10:41:485 hrs ago1736851308IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176604442025-01-14 10:11:456 hrs ago1736849505IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176601272025-01-14 9:41:456 hrs ago1736847705IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176598092025-01-14 9:11:457 hrs ago1736845905IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176594912025-01-14 8:41:477 hrs ago1736844107IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176591732025-01-14 8:11:468 hrs ago1736842306IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176588542025-01-14 7:41:428 hrs ago1736840502IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176585362025-01-14 7:11:459 hrs ago1736838705IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176582172025-01-14 6:41:419 hrs ago1736836901IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176578992025-01-14 6:11:4310 hrs ago1736835103IN
0xc907C2a4...E799A2dd3
0 CRO0.405167485,002.5
Update Price176575812025-01-14 5:41:4410 hrs ago1736833304IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176572622025-01-14 5:11:4211 hrs ago1736831502IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176569432025-01-14 4:41:4211 hrs ago1736829702IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
Update Price176566252025-01-14 4:11:4312 hrs ago1736827903IN
0xc907C2a4...E799A2dd3
0 CRO0.405287545,002.5
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x6E290256...0023b8051
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
CronosOracle

Compiler Version
v0.8.4+commit.c7e474f2

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion
File 1 of 10 : CronosOracle.sol
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;

import "./CronosOracleBase.sol";
import "./CronosOracleReader.sol";
import "./CronosOracleUpdater.sol";
import "./CronosOracleStorage.sol";

contract CronosOracle is 
  AggregatorV2V3Interface,
  CronosOracleBase,
  CronosOracleUpdater,
  CronosOracleReader {

  constructor(
    uint8 __decimals,
    string memory __description
  ) {
    _decimals = __decimals;
    _description = __description;
  }


}

File 2 of 10 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _setOwner(_msgSender());
    }

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

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

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 3 of 10 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

File 4 of 10 : CronosOracleBase.sol
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "./interface/chainlink/AggregatorV2V3Interface.sol";

abstract contract CronosOracleBase is Ownable {}

File 5 of 10 : CronosOracleReader.sol
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;

import "./CronosOracleStorage.sol";
import "./interface/chainlink/AggregatorV2V3Interface.sol";

contract CronosOracleReader is CronosOracleStorage, AggregatorV2V3Interface {

  string constant private V3_NO_DATA_ERROR = "No data present";

  function latestAnswer()
    override
    external
    view
    returns (
      int256
    )
  {
    return prices[lastCompletedRoundId];
  }
  
  function latestTimestamp()
    override
    external
    view
    returns (
      uint256
    ) {
    return updatedTimestamps[lastCompletedRoundId];
  }

  function latestRound()
    override
    external
    view
    returns (
      uint256
    ) {
    return lastCompletedRoundId;
  }

  function getAnswer(
    uint256 _roundId
  )
    override
    external
    view
    returns (
      int256
    ) {
    return prices[_roundId];
  }

  function getTimestamp(
    uint256 _roundId
  )
    override
    external
    view
    returns (
      uint256
    ) {
    return updatedTimestamps[_roundId];
  }

  function decimals()
    override
    external
    view
    returns (
      uint8
    ) {
    return _decimals;
  }

  function description()
    override
    external
    view
    returns (
      string memory
    ) {
    return _description;
  }

  function version()
    override
    external
    view
    returns (
      uint256
    ) {
    return _version;
  }

  // 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
  )
    override
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    )
  {
    return _getRoundData(_roundId);
  }

  function latestRoundData()
    override
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    ) {
    return _getRoundData(uint80(lastCompletedRoundId));
    }

  /*
   * Internal
   */

  function _getRoundData(uint80 _roundId)
    internal
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    )
  {
    answer = prices[_roundId];
    uint64 timestamp = uint64(updatedTimestamps[_roundId]);

    require(timestamp > 0, V3_NO_DATA_ERROR);

    return (_roundId, answer, timestamp, timestamp, _roundId);
  }


}

File 6 of 10 : CronosOracleStorage.sol
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";

contract CronosOracleStorage {

  uint8 public _decimals;
  string public _description;
  uint256 constant public _version = 2;

  uint256 internal lastCompletedRoundId;
  uint256 internal lastUpdatedTimestamp;

  mapping(uint256 => int256) internal prices;               // roundId to price
  mapping(uint256 => uint256) internal updatedTimestamps;   // roundId to timestamp

  mapping(address => bool) internal authorizedUpdaters;
}

File 7 of 10 : CronosOracleUpdater.sol
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "./CronosOracleStorage.sol";
import "./CronosOracleBase.sol";

contract CronosOracleUpdater is CronosOracleStorage, CronosOracleBase {

  event PriceUpdated(
    uint256 indexed roundId,
    uint256 indexed timestamp,
    int256 indexed price
  );

  function updatePrice(
    uint256 _roundId,
    uint256 _timestamp,
    int256 _newPrice
  ) public onlyAuthorizedUpdaters {
    lastCompletedRoundId = _roundId;
    lastUpdatedTimestamp = _timestamp;
    prices[_roundId] = _newPrice;
    updatedTimestamps[_roundId] = _timestamp;

    emit PriceUpdated(_roundId, _timestamp, _newPrice);
  }

  // gas savings when we don't send the timestamp in calldata
  function updatePriceNoTimestamp(
    uint256 _roundId,
    int256 _newPrice
  ) external onlyAuthorizedUpdaters {
    updatePrice((_roundId), block.timestamp, _newPrice);
  }

  modifier onlyAuthorizedUpdaters() {
    if (_msgSender() != owner()) {
      require(authorizedUpdaters[_msgSender()], "Caller not authorized");
    }
    _;
  }

  function addAuthorizedUpdater(address signer) public onlyOwner returns (bool) {
    bool wasAuthorized = authorizedUpdaters[signer];
    if (wasAuthorized) {
      return false;
    } else {
      authorizedUpdaters[signer] = true;
      return true;
    }
  }

  function removeAuthorizedUpdater(address signer) public onlyOwner returns (bool) {
    bool wasAuthorized = authorizedUpdaters[signer];
    delete authorizedUpdaters[signer];
    return wasAuthorized;
  }
}

File 8 of 10 : AggregatorInterface.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface AggregatorInterface {
  function latestAnswer()
    external
    view
    returns (
      int256
    );
  
  function latestTimestamp()
    external
    view
    returns (
      uint256
    );

  function latestRound()
    external
    view
    returns (
      uint256
    );

  function getAnswer(
    uint256 roundId
  )
    external
    view
    returns (
      int256
    );

  function getTimestamp(
    uint256 roundId
  )
    external
    view
    returns (
      uint256
    );

  event AnswerUpdated(
    int256 indexed current,
    uint256 indexed roundId,
    uint256 updatedAt
  );

  event NewRound(
    uint256 indexed roundId,
    address indexed startedBy,
    uint256 startedAt
  );
}

File 9 of 10 : AggregatorV2V3Interface.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./AggregatorInterface.sol";
import "./AggregatorV3Interface.sol";

interface AggregatorV2V3Interface is AggregatorInterface, AggregatorV3Interface
{
}

File 10 of 10 : AggregatorV3Interface.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface AggregatorV3Interface {

  function decimals()
    external
    view
    returns (
      uint8
    );

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

  function version()
    external
    view
    returns (
      uint256
    );

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

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

}

Settings
{
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"uint8","name":"__decimals","type":"uint8"},{"internalType":"string","name":"__description","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"int256","name":"current","type":"int256"},{"indexed":true,"internalType":"uint256","name":"roundId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"updatedAt","type":"uint256"}],"name":"AnswerUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"roundId","type":"uint256"},{"indexed":true,"internalType":"address","name":"startedBy","type":"address"},{"indexed":false,"internalType":"uint256","name":"startedAt","type":"uint256"}],"name":"NewRound","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"roundId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"timestamp","type":"uint256"},{"indexed":true,"internalType":"int256","name":"price","type":"int256"}],"name":"PriceUpdated","type":"event"},{"inputs":[],"name":"_decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_description","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_version","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"signer","type":"address"}],"name":"addAuthorizedUpdater","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"description","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_roundId","type":"uint256"}],"name":"getAnswer","outputs":[{"internalType":"int256","name":"","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint80","name":"_roundId","type":"uint80"}],"name":"getRoundData","outputs":[{"internalType":"uint80","name":"roundId","type":"uint80"},{"internalType":"int256","name":"answer","type":"int256"},{"internalType":"uint256","name":"startedAt","type":"uint256"},{"internalType":"uint256","name":"updatedAt","type":"uint256"},{"internalType":"uint80","name":"answeredInRound","type":"uint80"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_roundId","type":"uint256"}],"name":"getTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"latestAnswer","outputs":[{"internalType":"int256","name":"","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"latestRound","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"latestRoundData","outputs":[{"internalType":"uint80","name":"roundId","type":"uint80"},{"internalType":"int256","name":"answer","type":"int256"},{"internalType":"uint256","name":"startedAt","type":"uint256"},{"internalType":"uint256","name":"updatedAt","type":"uint256"},{"internalType":"uint80","name":"answeredInRound","type":"uint80"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"latestTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"signer","type":"address"}],"name":"removeAuthorizedUpdater","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_roundId","type":"uint256"},{"internalType":"uint256","name":"_timestamp","type":"uint256"},{"internalType":"int256","name":"_newPrice","type":"int256"}],"name":"updatePrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_roundId","type":"uint256"},{"internalType":"int256","name":"_newPrice","type":"int256"}],"name":"updatePriceNoTimestamp","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

Deployed Bytecode

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