Contract 0x67fe1c6598c6213083d631c5246ce4b8ce54198b

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

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

contract TuringHelper is ITuringHelper, Ownable {

  TuringHelper Self;

  // This protects your own credits for this helper contract
  mapping(address => bool) public permittedCaller;

  event AddPermittedCaller(address _callerAddress);
  event RemovePermittedCaller(address _callerAddress);
  event CheckPermittedCaller(address _callerAddress, bool permitted);
  event OffchainResponse(uint version, bytes responseData);
  event OffchainRandom(uint version, uint256 random);

  modifier onlyPermittedCaller() {
    require(
      permittedCaller[msg.sender],
      'Invalid Caller Address'
    );
    _;
  }

  constructor () public {
    Self = TuringHelper(address(this));
  }

  function addPermittedCaller(address _callerAddress)
    public onlyOwner {
      permittedCaller[_callerAddress] = true;
      emit AddPermittedCaller(_callerAddress);
  }

  function removePermittedCaller(address _callerAddress)
    public onlyOwner {
      permittedCaller[_callerAddress] = false;
      emit RemovePermittedCaller(_callerAddress);
  }

  function checkPermittedCaller(address _callerAddress)
    public returns (bool) {
      bool permitted = permittedCaller[_callerAddress];
      emit CheckPermittedCaller(_callerAddress, permitted);
      return permitted;
  }

  function GetErrorCode(uint32 rType)
    internal view returns (string memory) {
      if(rType ==  1) return "TURING: Geth intercept failure";
      if(rType == 10) return "TURING: Incorrect input state";
      if(rType == 11) return "TURING: Calldata too short";
      if(rType == 12) return "TURING: URL >64 bytes";
      if(rType == 13) return "TURING: Server error";
      if(rType == 14) return "TURING: Could not decode server response";
      if(rType == 15) return "TURING: Could not create rpc client";
      if(rType == 16) return "TURING: RNG failure";
      if(rType == 17) return "TURING: API Response >322 chars";
      if(rType == 18) return "TURING: API Response >160 bytes";
      if(rType == 19) return "TURING: Insufficient credit";
      if(rType == 20) return "TURING: Missing cache entry";
  }

  /* This is the interface to the off-chain mechanism. Although
     marked as "public", it is only to be called by TuringCall()
     or TuringTX().
     The _payload parameter is overloaded to represent either the
     request parameters or the off-chain response, with the rType
     parameter indicating which is which.
     When called as a request (rType == 1), it starts the offchain call,
     which, if all all goes well, results in the rType changing to 2.
     This response is then passed back to the caller.
  */
  function GetResponse(uint32 rType, string memory _url, bytes memory _payload)
    public returns (bytes memory) {

    require (msg.sender == address(this), "Turing:GetResponse:msg.sender != address(this)");
    require (_payload.length > 0, "Turing:GetResponse:no payload");
    require (rType == 2, string(GetErrorCode(rType))); // l2geth can pass values here to provide debug information
    return _payload;
  }

  function GetRandom(uint32 rType, uint256 _random)
    public returns (uint256) {

    require (msg.sender == address(this), "Turing:GetResponse:msg.sender != address(this)");
    require (rType == 2, string(GetErrorCode(rType)));
    return _random;
  }

  /* Called from the external contract. It takes an api endponit URL
     and an abi-encoded request payload. The URL and the list of allowed
     methods are supplied when the contract is created. In the future
     some of this registration might be moved into l2geth, allowing for
     security measures such as TLS client certificates. A configurable timeout
     could also be added.

     Logs the offchain response so that a future verifier or fraud prover
     can replay the transaction and ensure that it results in the same state
     root as during the initial execution. Note - a future version might
     need to include a timestamp and/or more details about the
     offchain interaction.
  */
  function TuringTx(string memory _url, bytes memory _payload)
    public onlyPermittedCaller override returns (bytes memory) {
      require (_payload.length > 0, "Turing:TuringTx:no payload");

      /* Initiate the request. This can't be a local function call
         because that would stay inside the EVM and not give l2geth
         a place to intercept and re-write the call.
      */
      bytes memory response = Self.GetResponse(1, _url, _payload);
      emit OffchainResponse(0x01, response);
      return response;
  }

  function TuringRandom()
    public onlyPermittedCaller returns (uint256) {

      uint256 response = Self.GetRandom(1, 0);
      emit OffchainRandom(0x01, response);
      return response;
  }

    // ERC165 check interface
    function supportsInterface(bytes4 _interfaceId) public pure returns (bool) {
        bytes4 firstSupportedInterface = bytes4(keccak256("supportsInterface(bytes4)")); // ERC165
        bytes4 secondSupportedInterface = ITuringHelper.TuringTx.selector;
        return _interfaceId == firstSupportedInterface || _interfaceId == secondSupportedInterface;
    }
}

// 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);
    }
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

interface ITuringHelper {

    /* Called from the external contract. It takes an api endponit URL
       and an abi-encoded request payload. The URL and the list of allowed
       methods are supplied when the contract is created. In the future
       some of this registration might be moved into l2geth, allowing for
       security measures such as TLS client certificates. A configurable timeout
       could also be added.

       Logs the offchain response so that a future verifier or fraud prover
       can replay the transaction and ensure that it results in the same state
       root as during the initial execution. Note - a future version might
       need to include a timestamp and/or more details about the
       offchain interaction.
    */
    function TuringTx(string memory _url, bytes memory _payload) external returns (bytes memory);

    function TuringRandom() external returns (uint256);
}

// 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;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "metadata": {
    "bytecodeHash": "none",
    "useLiteralContent": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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