@zapjs/artifacts/build/contracts/Dispatch.json

{
  "contractName": "Dispatch",
  "abi": [
    {
      "constant": true,
      "inputs": [],
      "name": "db",
      "outputs": [
        {
          "name": "",
          "type": "address"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [],
      "name": "updateDependencies",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [],
      "name": "owner",
      "outputs": [
        {
          "name": "",
          "type": "address"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [],
      "name": "bondage",
      "outputs": [
        {
          "name": "",
          "type": "address"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [],
      "name": "selfDestruct",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [],
      "name": "bondageAddress",
      "outputs": [
        {
          "name": "",
          "type": "address"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "newOwner",
          "type": "address"
        }
      ],
      "name": "transferOwnership",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "name": "c",
          "type": "address"
        }
      ],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "constructor"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "id",
          "type": "uint256"
        },
        {
          "indexed": true,
          "name": "provider",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "subscriber",
          "type": "address"
        },
        {
          "indexed": false,
          "name": "query",
          "type": "string"
        },
        {
          "indexed": false,
          "name": "endpoint",
          "type": "bytes32"
        },
        {
          "indexed": false,
          "name": "endpointParams",
          "type": "bytes32[]"
        },
        {
          "indexed": false,
          "name": "onchainSubscriber",
          "type": "bool"
        }
      ],
      "name": "Incoming",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "subscriber",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "provider",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "endpoint",
          "type": "bytes32"
        }
      ],
      "name": "FulfillQuery",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "id",
          "type": "uint256"
        },
        {
          "indexed": true,
          "name": "subscriber",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "provider",
          "type": "address"
        },
        {
          "indexed": false,
          "name": "response",
          "type": "bytes32[]"
        }
      ],
      "name": "OffchainResponse",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "id",
          "type": "uint256"
        },
        {
          "indexed": true,
          "name": "subscriber",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "provider",
          "type": "address"
        },
        {
          "indexed": false,
          "name": "response",
          "type": "int256[]"
        }
      ],
      "name": "OffchainResponseInt",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "id",
          "type": "uint256"
        },
        {
          "indexed": true,
          "name": "subscriber",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "provider",
          "type": "address"
        },
        {
          "indexed": false,
          "name": "response1",
          "type": "string"
        }
      ],
      "name": "OffchainResult1",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "id",
          "type": "uint256"
        },
        {
          "indexed": true,
          "name": "subscriber",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "provider",
          "type": "address"
        },
        {
          "indexed": false,
          "name": "response1",
          "type": "string"
        },
        {
          "indexed": false,
          "name": "response2",
          "type": "string"
        }
      ],
      "name": "OffchainResult2",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "id",
          "type": "uint256"
        },
        {
          "indexed": true,
          "name": "subscriber",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "provider",
          "type": "address"
        },
        {
          "indexed": false,
          "name": "response1",
          "type": "string"
        },
        {
          "indexed": false,
          "name": "response2",
          "type": "string"
        },
        {
          "indexed": false,
          "name": "response3",
          "type": "string"
        }
      ],
      "name": "OffchainResult3",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "id",
          "type": "uint256"
        },
        {
          "indexed": true,
          "name": "subscriber",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "provider",
          "type": "address"
        },
        {
          "indexed": false,
          "name": "response1",
          "type": "string"
        },
        {
          "indexed": false,
          "name": "response2",
          "type": "string"
        },
        {
          "indexed": false,
          "name": "response3",
          "type": "string"
        },
        {
          "indexed": false,
          "name": "response4",
          "type": "string"
        }
      ],
      "name": "OffchainResult4",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "id",
          "type": "uint256"
        },
        {
          "indexed": true,
          "name": "subscriber",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "provider",
          "type": "address"
        }
      ],
      "name": "CanceledRequest",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "id",
          "type": "uint256"
        },
        {
          "indexed": true,
          "name": "subscriber",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "provider",
          "type": "address"
        }
      ],
      "name": "RevertCancelation",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "previousOwner",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "newOwner",
          "type": "address"
        }
      ],
      "name": "OwnershipTransferred",
      "type": "event"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "provider",
          "type": "address"
        },
        {
          "name": "userQuery",
          "type": "string"
        },
        {
          "name": "endpoint",
          "type": "bytes32"
        },
        {
          "name": "endpointParams",
          "type": "bytes32[]"
        }
      ],
      "name": "query",
      "outputs": [
        {
          "name": "id",
          "type": "uint256"
        }
      ],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        }
      ],
      "name": "cancelQuery",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        },
        {
          "name": "response",
          "type": "bytes32[]"
        }
      ],
      "name": "respondBytes32Array",
      "outputs": [
        {
          "name": "",
          "type": "bool"
        }
      ],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        },
        {
          "name": "response",
          "type": "int256[]"
        }
      ],
      "name": "respondIntArray",
      "outputs": [
        {
          "name": "",
          "type": "bool"
        }
      ],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        },
        {
          "name": "response",
          "type": "string"
        }
      ],
      "name": "respond1",
      "outputs": [
        {
          "name": "",
          "type": "bool"
        }
      ],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        },
        {
          "name": "response1",
          "type": "string"
        },
        {
          "name": "response2",
          "type": "string"
        }
      ],
      "name": "respond2",
      "outputs": [
        {
          "name": "",
          "type": "bool"
        }
      ],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        },
        {
          "name": "response1",
          "type": "string"
        },
        {
          "name": "response2",
          "type": "string"
        },
        {
          "name": "response3",
          "type": "string"
        }
      ],
      "name": "respond3",
      "outputs": [
        {
          "name": "",
          "type": "bool"
        }
      ],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        },
        {
          "name": "response1",
          "type": "string"
        },
        {
          "name": "response2",
          "type": "string"
        },
        {
          "name": "response3",
          "type": "string"
        },
        {
          "name": "response4",
          "type": "string"
        }
      ],
      "name": "respond4",
      "outputs": [
        {
          "name": "",
          "type": "bool"
        }
      ],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        }
      ],
      "name": "getProvider",
      "outputs": [
        {
          "name": "",
          "type": "address"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        }
      ],
      "name": "getSubscriber",
      "outputs": [
        {
          "name": "",
          "type": "address"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        }
      ],
      "name": "getEndpoint",
      "outputs": [
        {
          "name": "",
          "type": "bytes32"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        }
      ],
      "name": "getStatus",
      "outputs": [
        {
          "name": "",
          "type": "uint256"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        }
      ],
      "name": "getCancel",
      "outputs": [
        {
          "name": "",
          "type": "uint256"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        }
      ],
      "name": "getUserQuery",
      "outputs": [
        {
          "name": "",
          "type": "string"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "id",
          "type": "uint256"
        }
      ],
      "name": "getSubscriberOnchain",
      "outputs": [
        {
          "name": "",
          "type": "bool"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    }
  ],
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  "source": "pragma solidity ^0.4.24;\n// v1.0\n\nimport \"../../lib/ownership/Upgradable.sol\";\nimport \"../../lib/lifecycle/Destructible.sol\";\nimport \"../../lib/platform/Client.sol\";\nimport \"../../lib/platform/OnChainProvider.sol\";\nimport \"../bondage/BondageInterface.sol\";\nimport \"./DispatchInterface.sol\";\nimport \"../database/DatabaseInterface.sol\";\n\ncontract Dispatch is Destructible, DispatchInterface, Upgradable {\n\n    enum Status { Pending, Fulfilled, Canceled }\n\n    //event data provider is listening for, containing all relevant request parameters\n    event Incoming(\n        uint256 indexed id,\n        address indexed provider,\n        address indexed subscriber,\n        string query,\n        bytes32 endpoint,\n        bytes32[] endpointParams,\n        bool onchainSubscriber\n    );\n\n    event FulfillQuery(\n        address indexed subscriber,\n        address indexed provider,\n        bytes32 indexed endpoint\n    );\n\n    event OffchainResponse(\n        uint256 indexed id,\n        address indexed subscriber,\n        address indexed provider,\n        bytes32[] response\n    );\n\n    event OffchainResponseInt(\n        uint256 indexed id,\n        address indexed subscriber,\n        address indexed provider,\n        int[] response\n    );\n\n    event OffchainResult1(\n        uint256 indexed id,\n        address indexed subscriber,\n        address indexed provider,\n        string response1\n    );\n\n    event OffchainResult2(\n        uint256 indexed id,\n        address indexed subscriber,\n        address indexed provider,\n        string response1,\n        string response2\n    );\n\n    event OffchainResult3(\n        uint256 indexed id,\n        address indexed subscriber,\n        address indexed provider,\n        string response1,\n        string response2,\n        string response3\n    );\n\n    event OffchainResult4(\n        uint256 indexed id,\n        address indexed subscriber,\n        address indexed provider,\n        string response1,\n        string response2,\n        string response3,\n        string response4\n    );\n\n    event CanceledRequest(\n        uint256 indexed id,\n        address indexed subscriber,\n        address indexed provider\n    );\n\n    event RevertCancelation(\n        uint256 indexed id,\n        address indexed subscriber,\n        address indexed provider\n    );\n\n    BondageInterface public bondage;\n    address public bondageAddress;\n\n    DatabaseInterface public db;\n\n    constructor(address c) Upgradable(c) public {\n        //_updateDependencies();\n    }\n\n    function _updateDependencies() internal {\n        address databaseAddress = coordinator.getContract(\"DATABASE\");\n        db = DatabaseInterface(databaseAddress);\n\n        bondageAddress = coordinator.getContract(\"BONDAGE\");\n        bondage = BondageInterface(bondageAddress);\n    }\n\n    /// @notice Escrow dot for oracle request\n    /// @dev Called by user contract\n    function query(\n        address provider,           // data provider address\n        string userQuery,           // query string\n        bytes32 endpoint,           // endpoint specifier ala 'smart_contract'\n        bytes32[] endpointParams    // endpoint-specific params\n        )\n        external\n        returns (uint256 id)\n    {\n        uint256 dots = bondage.getBoundDots(msg.sender, provider, endpoint);\n        bool onchainProvider = isContract(provider);\n        bool onchainSubscriber = isContract(msg.sender);\n        if (dots >= 1) {\n            //enough dots\n            bondage.escrowDots(msg.sender, provider, endpoint, 1);\n\n            id = uint256(keccak256(abi.encodePacked(block.number, now, userQuery, msg.sender, provider)));\n\n            createQuery(id, provider, msg.sender, endpoint, userQuery, onchainSubscriber);\n            if (onchainProvider) {\n                OnChainProvider(provider).receive(id, userQuery, endpoint, endpointParams, onchainSubscriber);\n            } else{\n                emit Incoming(id, provider, msg.sender, userQuery, endpoint, endpointParams, onchainSubscriber);\n            }\n        } else { // NOT ENOUGH DOTS\n            revert(\"Subscriber does not have any dots.\");\n        }\n    }\n\n    /// @notice Transfer dots from Bondage escrow to data provider's Holder object under its own address\n    /// @dev Called upon data-provider request fulfillment\n    function fulfillQuery(uint256 id) private returns (bool) {\n        Status status = Status(getStatus(id));\n\n        require(status != Status.Fulfilled, \"Error: Status already fulfilled\");\n\n        address subscriber = getSubscriber(id);\n        address provider = getProvider(id);\n        bytes32 endpoint = getEndpoint(id);\n\n        if (status == Status.Canceled) {\n            uint256 canceled = getCancel(id);\n\n            // Make sure we've canceled in the past,\n            // if it's current block ignore the cancel\n            require(block.number == canceled, \"Error: Cancel ignored\");\n\n            // Uncancel the query\n            setCanceled(id, false);\n\n            // Re-escrow the previously returned dots\n            bondage.escrowDots(subscriber, provider, endpoint, 1);\n\n            // Emit the events\n            emit RevertCancelation(id, subscriber, provider);\n        }\n\n        setFulfilled(id);\n\n        bondage.releaseDots(subscriber, provider, endpoint, 1);\n\n        emit FulfillQuery(subscriber, provider, endpoint);\n\n        return true;\n    }\n\n    /// @notice Cancel a query.\n    /// @dev If responded on the same block, ignore the cancel.\n    function cancelQuery(uint256 id) external {\n        address subscriber = getSubscriber(id);\n        address provider = getProvider(id);\n        bytes32 endpoint = getEndpoint(id);\n\n        require(subscriber == msg.sender, \"Error: Wrong subscriber\");\n        require(Status(getStatus(id)) == Status.Pending, \"Error: Query is not pending\");\n\n        // Cancel the query\n        setCanceled(id, true);\n\n        // Return the dots to the subscriber\n        bondage.returnDots(subscriber, provider, endpoint, 1);\n\n        // Release an event\n        emit CanceledRequest(id, getSubscriber(id), getProvider(id));\n    }\n\n    /// @dev Parameter-count specific method called by data provider in response\n    function respondBytes32Array(\n        uint256 id,\n        bytes32[] response\n    )\n        external\n        returns (bool)\n    {\n        if (getProvider(id) != msg.sender || !fulfillQuery(id))\n            revert();\n        if (getSubscriberOnchain(id)) {\n            ClientBytes32Array(getSubscriber(id)).callback(id, response);\n        }\n        else {\n            emit OffchainResponse(id, getSubscriber(id), msg.sender, response);\n        }\n        return true;\n    }\n\n    /// @dev Parameter-count specific method called by data provider in response\n    function respondIntArray(\n        uint256 id,\n        int[] response\n    )\n        external\n        returns (bool)\n    {\n        if (getProvider(id) != msg.sender || !fulfillQuery(id))\n            revert();\n        if (getSubscriberOnchain(id)) {\n            ClientIntArray(getSubscriber(id)).callback(id, response);\n        }\n        else {\n            emit OffchainResponseInt(id, getSubscriber(id), msg.sender, response);\n        }\n        return true;\n    }\n\n\n    /// @dev Parameter-count specific method called by data provider in response\n    function respond1(\n        uint256 id,\n        string response\n    )\n        external\n        returns (bool)\n    {\n        if (getProvider(id) != msg.sender || !fulfillQuery(id))\n            revert();\n\n        if (getSubscriberOnchain(id)) {\n            Client1(getSubscriber(id)).callback(id, response);\n        }\n        else {\n            emit OffchainResult1(id, getSubscriber(id), msg.sender, response);\n        }\n        return true;\n    }\n\n    /// @dev Parameter-count specific method called by data provider in response\n    function respond2(\n        uint256 id,\n        string response1,\n        string response2\n    )\n        external\n        returns (bool)\n    {\n        if (getProvider(id) != msg.sender || !fulfillQuery(id))\n            revert();\n\n        if (getSubscriberOnchain(id)) {\n            Client2(getSubscriber(id)).callback(id, response1, response2);\n        }\n        else {\n            emit OffchainResult2(id, getSubscriber(id), msg.sender, response1, response2);\n        }\n\n        return true;\n    }\n\n    /// @dev Parameter-count specific method called by data provider in response\n    function respond3(\n        uint256 id,\n        string response1,\n        string response2,\n        string response3\n    )\n        external\n        returns (bool)\n    {\n        if (getProvider(id) != msg.sender || !fulfillQuery(id))\n            revert();\n\n        if (getSubscriberOnchain(id)) {\n            Client3(getSubscriber(id)).callback(id, response1, response2, response3);\n        }\n        else {\n            emit OffchainResult3(id, getSubscriber(id), msg.sender, response1, response2, response3);\n        }\n\n        return true;\n    }\n\n    /// @dev Parameter-count specific method called by data provider in response\n    function respond4(\n        uint256 id,\n        string response1,\n        string response2,\n        string response3,\n        string response4\n    )\n        external\n        returns (bool)\n    {\n        if (getProvider(id) != msg.sender || !fulfillQuery(id))\n            revert();\n\n        if (getSubscriberOnchain(id)) {\n            Client4(getSubscriber(id)).callback(id, response1, response2, response3, response4);\n        }\n        else {\n            emit OffchainResult4(id, getSubscriber(id), msg.sender, response1, response2, response3, response4);\n        }\n\n        return true;\n    }\n\n    /*** STORAGE METHODS ***/\n\n    /// @dev get provider address of request\n    /// @param id request id\n    function getProvider(uint256 id) public view returns (address) {\n        return address(db.getNumber(keccak256(abi.encodePacked('queries', id, 'provider'))));\n    }\n\n    /// @dev get subscriber address of request\n    /// @param id request id\n    function getSubscriber(uint256 id) public view returns (address) {\n        return address(db.getNumber(keccak256(abi.encodePacked('queries', id, 'subscriber'))));\n    }\n\n    /// @dev get endpoint of request\n    /// @param id request id\n    function getEndpoint(uint256 id) public view returns (bytes32) {\n        return db.getBytes32(keccak256(abi.encodePacked('queries', id, 'endpoint')));\n    }\n\n    /// @dev get status of request\n    /// @param id request id\n    function getStatus(uint256 id) public view returns (uint256) {\n        return db.getNumber(keccak256(abi.encodePacked('queries', id, 'status')));\n    }\n\n    /// @dev get the cancelation block of a request\n    /// @param id request id\n    function getCancel(uint256 id) public view returns (uint256) {\n        return db.getNumber(keccak256(abi.encodePacked('queries', id, 'cancelBlock')));\n    }\n\n    /// @dev get user specified query of request\n    /// @param id request id\n    function getUserQuery(uint256 id) public view returns (string) {\n        return db.getString(keccak256(abi.encodePacked('queries', id, 'userQuery')));\n    }\n\n    /// @dev is subscriber contract or offchain \n    /// @param id request id\n    function getSubscriberOnchain(uint256 id) public view returns (bool) {\n        uint res = db.getNumber(keccak256(abi.encodePacked('queries', id, 'onchainSubscriber')));\n        return res == 1 ? true : false;\n    }\n\n    /**** Set Methods ****/\n    function createQuery(\n        uint256 id,\n        address provider,\n        address subscriber,\n        bytes32 endpoint,\n        string userQuery,\n        bool onchainSubscriber\n    )\n        private\n    {\n        db.setNumber(keccak256(abi.encodePacked('queries', id, 'provider')), uint256(provider));\n        db.setNumber(keccak256(abi.encodePacked('queries', id, 'subscriber')), uint256(subscriber));\n        db.setBytes32(keccak256(abi.encodePacked('queries', id, 'endpoint')), endpoint);\n        db.setString(keccak256(abi.encodePacked('queries', id, 'userQuery')), userQuery);\n        db.setNumber(keccak256(abi.encodePacked('queries', id, 'status')), uint256(Status.Pending));\n        db.setNumber(keccak256(abi.encodePacked('queries', id, 'onchainSubscriber')), onchainSubscriber ? 1 : 0);\n    }\n\n    function setFulfilled(uint256 id) private {\n        db.setNumber(keccak256(abi.encodePacked('queries', id, 'status')), uint256(Status.Fulfilled));\n    }\n\n    function setCanceled(uint256 id, bool canceled) private {\n        if (canceled) {\n            db.setNumber(keccak256(abi.encodePacked('queries', id, 'cancelBlock')), block.number);\n            db.setNumber(keccak256(abi.encodePacked('queries', id, 'status')), uint256(Status.Canceled));\n        }\n        else {\n            db.setNumber(keccak256(abi.encodePacked('queries', id, 'cancelBlock')), 0);\n            db.setNumber(keccak256(abi.encodePacked('queries', id, 'status')), uint256(Status.Pending));\n        }\n    }\n\n    function isContract(address addr) private view returns (bool) {\n        uint size;\n        assembly { size := extcodesize(addr) }\n        return size > 0;\n    }\n}\n\n/*\n/* For use in example contract, see TestContracts.sol\n/*\n/* When User Contract calls ZapDispatch.query(),\n/* 1 oracle specific dot is escrowed by ZapBondage and Incoming event is ted.\n/*\n/* When provider's client hears an Incoming event containing provider's address and responds,\n/* the provider calls a ZapDispatch.respondX function corresponding to number of response params.\n/*\n/* Dots are moved from ZapBondage escrow to data-provider's bond Holder struct,\n/* with data provider address set as self's address.\n/*/\n\n/*************************************** STORAGE ****************************************\n* 'queries', id, 'provider' => {address} address of provider that this query was sent to\n* 'queries', id, 'subscriber' => {address} address of subscriber that this query was sent by\n* 'queries', id, 'endpoint' => {bytes32} endpoint that this query was sent to\n* 'queries', id, 'status' => {Status} current status of this query\n* 'queries', id, 'cancelBlock' => {uint256} the block number of the cancellation request (0 if none)\n* 'queries', id, 'userQuery' => {uint256} the query that was sent with this queryId\n* 'queries', id, 'onchainSubscriber' => {uint256} 1 -> onchainSubscriber, 0 -> offchainSubscriber\n****************************************************************************************/\n",
  "sourcePath": "/home/xv702/2zap/zap-ethereum-api/contracts/platform/dispatch/Dispatch.sol",
  "ast": {
    "absolutePath": "/home/xv702/2zap/zap-ethereum-api/contracts/platform/dispatch/Dispatch.sol",
    "exportedSymbols": {
      "Dispatch": [
        10008
      ]
    },
    "id": 10009,
    "nodeType": "SourceUnit",
    "nodes": [
      {
        "id": 8827,
        "literals": [
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          "^",
          "0.4",
          ".24"
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        "nodeType": "PragmaDirective",
        "src": "0:24:33"
      },
      {
        "absolutePath": "/home/xv702/2zap/zap-ethereum-api/contracts/lib/ownership/Upgradable.sol",
        "file": "../../lib/ownership/Upgradable.sol",
        "id": 8828,
        "nodeType": "ImportDirective",
        "scope": 10009,
        "sourceUnit": 252,
        "src": "34:44:33",
        "symbolAliases": [],
        "unitAlias": ""
      },
      {
        "absolutePath": "/home/xv702/2zap/zap-ethereum-api/contracts/lib/lifecycle/Destructible.sol",
        "file": "../../lib/lifecycle/Destructible.sol",
        "id": 8829,
        "nodeType": "ImportDirective",
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        "src": "79:46:33",
        "symbolAliases": [],
        "unitAlias": ""
      },
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        "absolutePath": "/home/xv702/2zap/zap-ethereum-api/contracts/lib/platform/Client.sol",
        "file": "../../lib/platform/Client.sol",
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        "nodeType": "ImportDirective",
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        "src": "126:39:33",
        "symbolAliases": [],
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      },
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        "nodeType": "ImportDirective",
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        "src": "166:48:33",
        "symbolAliases": [],
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      },
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        "nodeType": "ImportDirective",
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        "src": "215:41:33",
        "symbolAliases": [],
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        "absolutePath": "/home/xv702/2zap/zap-ethereum-api/contracts/platform/dispatch/DispatchInterface.sol",
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        "nodeType": "ImportDirective",
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        "src": "257:33:33",
        "symbolAliases": [],
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        "absolutePath": "/home/xv702/2zap/zap-ethereum-api/contracts/platform/database/DatabaseInterface.sol",
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        "nodeType": "ImportDirective",
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        "src": "291:43:33",
        "symbolAliases": [],
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              "src": "357:12:33",
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              "src": "371:17:33",
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                {
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