diff --git a/README.md b/README.md
index cd574f7..541dcc9 100644
--- a/README.md
+++ b/README.md
@@ -1,102 +1,118 @@
-# Example Chainlinks
-Example Chainlinks that get data from various sources. Already deployed to Ropsten, you can run the included scripts to easily fetch data on-chain via Chainlink.
-
-### Current examples:
-
-- **AlphaVantage** ([Bridges URL](https://s3.linkpool.io/bridges/alphavantage.json))**:** Forex rates
-- **[API Aggregator](https://github.com/linkpoolio/bridges/tree/master/examples/apiaggregator)**: Aggregate values from
-multiple APIs for ETH & BTC.
-- **[Asset Price](https://github.com/linkpoolio/asset-price-cl-ea):** Specify any crypto pair and get a price aggregated by weighted volume from all supported exchanges 
-that list a pair. Eg: BTC-USD, LINK-BTC, ETH-USDT, ADA-BTC.
-- **[Wolfram Alpha](https://github.com/linkpoolio/bridges/tree/master/examples/wolframalpha):** Find the distance between 
-two locations in miles using the Short Answers API and natural language.
-- **Rapid API (Weather)** ([Bridges URL](https://s3.linkpool.io/bridges/rapidapi.json))**:** Get the temperature, 
-humidity and windspeeds at any global location.
-
-## Install
-
-Install dependencies with yarn/npm.
-
-## General Usage
-
-To first use this on Ropsten, you can update `truffle.js` with your private key and RPC host for deployment. 
-This could be Infura or your own node for example.
-
-**This repository includes the ropsten contract `build` files, so once you set up `truffle.js` you can use the scripts
- on the Ropsten network.**
-
-You can also deploy this locally using `ganache-cli`, but you need to deploy the `Oracle.sol` contract for 
-your Chainlink node and create a new job spec as per the example you want to use in `specs`.
-
-### Setup
-
-In `truffle.js` enter your mnemonic and Ethereum URL, eg Infura.
-
-### Deployment
-
-To deploy, run a standard Truffle migration (uses Truffle from local deps):
-```
-npm run migrate
-```
-
-### Requesting Data
-
-#### Alpha Vantage
-Request the current rate of the pound to the dollar:
-```
-npm run exec scripts/alphavantage/request.js -- GBP USD --network ropsten
-npm run exec scripts/alphavantage/get.js -- GBP USD --network ropsten
-```
-
-#### API Aggregator
-Request the current price of BTC aggregated from Coinbase & Bitstamp:
-```
-npm run exec scripts/apiaggregator/request.js -- --network ropsten
-npm run exec scripts/apiaggregator/get.js -- --network ropsten
-```
-
-#### Asset Price
-Request the price of BTC-USD aggregated from many exchanges:
-```
-npm run exec scripts/assetprice/request.js BTC USD -- --network ropsten
-npm run exec scripts/assetprice/get.js BTC USD -- --network ropsten
-```
-LINK-BTC:
-```
-npm run exec scripts/assetprice/request.js LINK BTC -- --network ropsten
-npm run exec scripts/assetprice/get.js LINK BTC -- --network ropsten
-```
-
-#### WolframAlpha Location Distance (Short Answers API)
-Request the distance between London and Tokyo:
-```
-npm run exec scripts/wolframalpha/request.js London Tokyo -- --network ropsten
-npm run exec scripts/wolframalpha/get.js London Tokyo -- --network ropsten
-```
-
-#### Rapid API Weather (OpenWeatherMap)
-Request the temperature in Celsius:
-```
-npm run exec scripts/rapidapiweather/request.js metricTemp London,uk -- --network ropsten
-npm run exec scripts/rapidapiweather/get.js metricTemp London,uk -- --network ropsten
-```
-
-Request the humidity percentage:
-```
-npm run exec scripts/rapidapiweather/request.js humidity London,uk -- --network ropsten
-npm run exec scripts/rapidapiweather/get.js humidity London,uk -- --network ropsten
-```
-
-Request the windspeed in mph:
-```
-npm run exec scripts/rapidapiweather/request.js windSpeed London,uk -- --network ropsten
-npm run exec scripts/rapidapiweather/get.js windSpeed London,uk -- --network ropsten
-```
-
-
-## Notes
-The `truffle.js` ropsten network is configured to point to a [LinkPool](https://linkpool.io) node. 
-You don't need to change the configuration as our node will accept requests from your contract with no changes. 
-
-Although, you can edit the `jobId` and `oracleAddress` as specified in the Truffle configuration to point to 
-your own node.
+# Example Chainlinks
+
+Example Chainlinks that get data from various sources. Already deployed to Ropsten, you can run the included scripts to easily fetch data on-chain via Chainlink.
+
+### Current examples:
+
+- **AlphaVantage** ([Bridges URL](https://s3.linkpool.io/bridges/alphavantage.json))**:** Forex rates
+- **[API Aggregator](https://github.com/linkpoolio/bridges/tree/master/examples/apiaggregator)**: Aggregate values from
+  multiple APIs for ETH & BTC.
+- **[Asset Price](https://github.com/linkpoolio/asset-price-cl-ea):** Specify any crypto pair and get a price aggregated by weighted volume from all supported exchanges
+  that list a pair. Eg: BTC-USD, LINK-BTC, ETH-USDT, ADA-BTC.
+- **[Wolfram Alpha](https://github.com/linkpoolio/bridges/tree/master/examples/wolframalpha):** Find the distance between
+  two locations in miles using the Short Answers API and natural language.
+- **Rapid API (Weather)** ([Bridges URL](https://s3.linkpool.io/bridges/rapidapi.json))**:** Get the temperature,
+  humidity and windspeeds at any global location.
+
+## Install
+
+Install dependencies with yarn/npm.
+
+## General Usage
+
+To first use this on Ropsten, you can update `truffle.js` with your private key and RPC host for deployment.
+This could be Infura or your own node for example.
+
+**This repository includes the ropsten contract `build` files, so once you set up `truffle.js` you can use the scripts
+on the Ropsten network.**
+
+You can also deploy this locally using `ganache-cli`, but you need to deploy the `Oracle.sol` contract for
+your Chainlink node and create a new job spec as per the example you want to use in `specs`.
+
+### Setup
+
+In `truffle.js` enter your mnemonic and Ethereum URL, eg Infura.
+
+### Deployment
+
+To deploy, run a standard Truffle migration (uses Truffle from local deps):
+
+```
+npm run migrate
+```
+
+### Requesting Data
+
+#### Alpha Vantage
+
+Request the current rate of the pound to the dollar:
+
+```
+npm run exec scripts/alphavantage/request.js -- GBP USD --network ropsten
+npm run exec scripts/alphavantage/get.js -- GBP USD --network ropsten
+```
+
+#### API Aggregator
+
+Request the current price of BTC aggregated from Coinbase & Bitstamp:
+
+```
+npm run exec scripts/apiaggregator/request.js -- --network ropsten
+npm run exec scripts/apiaggregator/get.js -- --network ropsten
+```
+
+#### Asset Price
+
+Request the price of BTC-USD aggregated from many exchanges:
+
+```
+npm run exec scripts/assetprice/request.js BTC USD -- --network ropsten
+npm run exec scripts/assetprice/get.js BTC USD -- --network ropsten
+```
+
+LINK-BTC:
+
+```
+npm run exec scripts/assetprice/request.js LINK BTC -- --network ropsten
+npm run exec scripts/assetprice/get.js LINK BTC -- --network ropsten
+```
+
+#### WolframAlpha (Short Answers API)
+
+Request a numerical answer to any question (ex. distance between London and Tokyo):
+
+```
+npm run exec scripts/wolfram/request.js "What's the distance between London and Tokyo?" 1 -- --network ropsten
+npm run exec scripts/wolfram/get.js "What's the distance between London and Tokyo?" -- --network ropsten
+```
+
+#### Rapid API Weather (OpenWeatherMap)
+
+Request the temperature in Celsius:
+
+```
+npm run exec scripts/rapidapiweather/request.js metricTemp London,uk -- --network ropsten
+npm run exec scripts/rapidapiweather/get.js metricTemp London,uk -- --network ropsten
+```
+
+Request the humidity percentage:
+
+```
+npm run exec scripts/rapidapiweather/request.js humidity London,uk -- --network ropsten
+npm run exec scripts/rapidapiweather/get.js humidity London,uk -- --network ropsten
+```
+
+Request the windspeed in mph:
+
+```
+npm run exec scripts/rapidapiweather/request.js windSpeed London,uk -- --network ropsten
+npm run exec scripts/rapidapiweather/get.js windSpeed London,uk -- --network ropsten
+```
+
+## Notes
+
+The `truffle.js` ropsten network is configured to point to a [LinkPool](https://linkpool.io) node.
+You don't need to change the configuration as our node will accept requests from your contract with no changes.
+
+Although, you can edit the `jobId` and `oracleAddress` as specified in the Truffle configuration to point to
+your own node.
diff --git a/build/contracts/WolframAlphaConsumer.json b/build/contracts/WolframAlphaConsumer.json
index b19b5fa..114b8b4 100644
--- a/build/contracts/WolframAlphaConsumer.json
+++ b/build/contracts/WolframAlphaConsumer.json
@@ -1,26 +1,6 @@
 {
   "contractName": "WolframAlphaConsumer",
   "abi": [
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "",
-          "type": "bytes32"
-        }
-      ],
-      "name": "distances",
-      "outputs": [
-        {
-          "name": "",
-          "type": "int256"
-        }
-      ],
-      "payable": false,
-      "stateMutability": "view",
-      "type": "function",
-      "signature": "0x5e71124d"
-    },
     {
       "constant": false,
       "inputs": [],
@@ -28,8 +8,7 @@
       "outputs": [],
       "payable": false,
       "stateMutability": "nonpayable",
-      "type": "function",
-      "signature": "0x715018a6"
+      "type": "function"
     },
     {
       "constant": true,
@@ -43,8 +22,7 @@
       ],
       "payable": false,
       "stateMutability": "view",
-      "type": "function",
-      "signature": "0x7f78636a"
+      "type": "function"
     },
     {
       "constant": true,
@@ -58,17 +36,30 @@
       ],
       "payable": false,
       "stateMutability": "view",
-      "type": "function",
-      "signature": "0x8da5cb5b"
+      "type": "function"
     },
     {
       "constant": true,
       "inputs": [
         {
-          "name": "_newOwner",
-          "type": "address"
+          "name": "",
+          "type": "bytes32"
+        }
+      ],
+      "name": "answers",
+      "outputs": [
+        {
+          "name": "",
+          "type": "int256"
         }
       ],
+      "payable": false,
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [],
       "name": "jobId",
       "outputs": [
         {
@@ -78,56 +69,40 @@
       ],
       "payable": false,
       "stateMutability": "view",
-      "type": "function",
-      "signature": "0xe7c356fa"
+      "type": "function"
     },
     {
+      "constant": false,
       "inputs": [
         {
           "name": "_newOwner",
           "type": "address"
-        },
-        {
-          "name": "_oracle",
-          "type": "address"
-        },
-        {
-          "name": "_jobId",
-          "type": "bytes32"
         }
       ],
+      "name": "transferOwnership",
+      "outputs": [],
       "payable": false,
       "stateMutability": "nonpayable",
-      "type": "function",
-      "signature": "0xc2e0eab6",
-      "constant": false,
-      "name": "transferOwnership",
-      "outputs": []
+      "type": "function"
     },
     {
-      "anonymous": false,
       "inputs": [
         {
-          "indexed": true,
           "name": "_token",
           "type": "address"
         },
         {
-          "indexed": true,
           "name": "_oracle",
           "type": "address"
         },
         {
-          "indexed": false,
           "name": "_jobId",
           "type": "bytes32"
         }
       ],
-      "name": "RequestFulfilled",
-      "type": "constructor",
-      "signature": "constructor",
       "payable": false,
-      "stateMutability": "nonpayable"
+      "stateMutability": "nonpayable",
+      "type": "constructor"
     },
     {
       "anonymous": false,
@@ -144,13 +119,12 @@
         },
         {
           "indexed": false,
-          "name": "distance",
+          "name": "answer",
           "type": "int256"
         }
       ],
       "name": "RequestFulfilled",
-      "type": "event",
-      "signature": "0x00d315d2ede2869d559e8244630c7ef9f0ff14101c60f81a98e7b2ec87779ad8"
+      "type": "event"
     },
     {
       "anonymous": false,
@@ -159,16 +133,10 @@
           "indexed": false,
           "name": "url",
           "type": "string"
-        },
-        {
-          "indexed": true,
-          "name": "newOwner",
-          "type": "address"
         }
       ],
       "name": "WolframAlphaQuery",
-      "type": "event",
-      "signature": "0x2e6a228ebcd37cbc08c1f3f98302c6a07940249ae7e25f187871a4488550f5b9"
+      "type": "event"
     },
     {
       "anonymous": false,
@@ -180,8 +148,7 @@
         }
       ],
       "name": "OwnershipRenounced",
-      "type": "event",
-      "signature": "0xf8df31144d9c2f0f6b59d69b8b98abd5459d07f2742c4df920b25aae33c64820"
+      "type": "event"
     },
     {
       "anonymous": false,
@@ -198,8 +165,7 @@
         }
       ],
       "name": "OwnershipTransferred",
-      "type": "event",
-      "signature": "0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0"
+      "type": "event"
     },
     {
       "anonymous": false,
@@ -211,77 +177,49 @@
         }
       ],
       "name": "ChainlinkRequested",
-      "type": "event",
-      "signature": "0xb5e6e01e79f91267dc17b4e6314d5d4d03593d2ceee0fbb452b750bd70ea5af9"
+      "type": "event"
     },
     {
-      "constant": false,
+      "anonymous": false,
       "inputs": [
         {
+          "indexed": true,
           "name": "id",
-          "type": "bytes32",
-          "indexed": true
-        },
-        {
-          "name": "_to",
-          "type": "string"
+          "type": "bytes32"
         }
       ],
       "name": "ChainlinkFulfilled",
-      "outputs": [],
-      "payable": false,
-      "stateMutability": "nonpayable",
-      "type": "event",
-      "signature": "0xf118080800bbb7bb373b05042ff756a8fe0f2a7d61b5eb8d4d7b704b16f01fe8",
-      "anonymous": false
+      "type": "event"
     },
     {
-      "constant": false,
+      "anonymous": false,
       "inputs": [
         {
+          "indexed": true,
           "name": "id",
-          "type": "bytes32",
-          "indexed": true
-        },
-        {
-          "name": "_payment",
-          "type": "uint256"
-        },
-        {
-          "name": "_callbackFunctionId",
-          "type": "bytes4"
-        },
-        {
-          "name": "_expiration",
-          "type": "uint256"
+          "type": "bytes32"
         }
       ],
       "name": "ChainlinkCancelled",
-      "outputs": [],
-      "payable": false,
-      "stateMutability": "nonpayable",
-      "type": "event",
-      "signature": "0x688bd290d48c4b1573778f3e6b4f374686c27aedfe20aa925e9e7253fb4dcbbf",
-      "anonymous": false
+      "type": "event"
     },
     {
       "constant": false,
       "inputs": [
         {
-          "name": "_from",
+          "name": "_query",
           "type": "string"
         },
         {
-          "name": "_to",
-          "type": "string"
+          "name": "_index",
+          "type": "uint8"
         }
       ],
-      "name": "requestDistance",
+      "name": "requestAnswer",
       "outputs": [],
       "payable": false,
       "stateMutability": "nonpayable",
-      "type": "function",
-      "signature": "0xd5f44631"
+      "type": "function"
     },
     {
       "constant": false,
@@ -307,8 +245,7 @@
       "outputs": [],
       "payable": false,
       "stateMutability": "nonpayable",
-      "type": "function",
-      "signature": "0xec65d0f8"
+      "type": "function"
     },
     {
       "constant": false,
@@ -318,7 +255,7 @@
           "type": "bytes32"
         },
         {
-          "name": "_distance",
+          "name": "_answer",
           "type": "int256"
         }
       ],
@@ -326,29 +263,28 @@
       "outputs": [],
       "payable": false,
       "stateMutability": "nonpayable",
-      "type": "function",
-      "signature": "0xbda71d04"
+      "type": "function"
     }
   ],
-  "metadata": "{\"compiler\":{\"version\":\"0.4.24+commit.e67f0147\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"constant\":true,\"inputs\":[{\"name\":\"\",\"type\":\"bytes32\"}],\"name\":\"distances\",\"outputs\":[{\"name\":\"\",\"type\":\"int256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"BASE_URL\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_requestId\",\"type\":\"bytes32\"},{\"name\":\"_distance\",\"type\":\"int256\"}],\"name\":\"fulfill\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"jobId\",\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_from\",\"type\":\"string\"},{\"name\":\"_to\",\"type\":\"string\"}],\"name\":\"requestDistance\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_requestId\",\"type\":\"bytes32\"},{\"name\":\"_payment\",\"type\":\"uint256\"},{\"name\":\"_callbackFunctionId\",\"type\":\"bytes4\"},{\"name\":\"_expiration\",\"type\":\"uint256\"}],\"name\":\"cancelRequest\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"_token\",\"type\":\"address\"},{\"name\":\"_oracle\",\"type\":\"address\"},{\"name\":\"_jobId\",\"type\":\"bytes32\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"requestId\",\"type\":\"bytes32\"},{\"indexed\":true,\"name\":\"hash\",\"type\":\"bytes32\"},{\"indexed\":false,\"name\":\"distance\",\"type\":\"int256\"}],\"name\":\"RequestFulfilled\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"name\":\"url\",\"type\":\"string\"}],\"name\":\"WolframAlphaQuery\",\"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\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"id\",\"type\":\"bytes32\"}],\"name\":\"ChainlinkRequested\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"id\",\"type\":\"bytes32\"}],\"name\":\"ChainlinkFulfilled\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"id\",\"type\":\"bytes32\"}],\"name\":\"ChainlinkCancelled\",\"type\":\"event\"}],\"devdoc\":{\"methods\":{\"renounceOwnership()\":{\"details\":\"Allows the current owner to relinquish control of the contract.\"},\"requestDistance(string,string)\":{\"details\":\"Request the distance between two location in miles\\r\",\"params\":{\"_from\":\"The location from, eg: London\\r\",\"_to\":\"The location to, eg: Sydney\\r\"}},\"transferOwnership(address)\":{\"details\":\"Allows the current owner to transfer control of the contract to a newOwner.\",\"params\":{\"_newOwner\":\"The address to transfer ownership to.\"}}}},\"userdoc\":{\"methods\":{\"renounceOwnership()\":{\"notice\":\"Renouncing to ownership will leave the contract without an owner. 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-  "source": "pragma solidity ^0.4.24;\r\n\r\nimport \"openzeppelin-solidity/contracts/ownership/Ownable.sol\";\r\nimport \"chainlink/contracts/Chainlinked.sol\";\r\n\r\n/**\r\n    @dev WolframAlpha Short Answers API Docs: https://products.wolframalpha.com/short-answers-api/documentation/\r\n*/\r\ncontract WolframAlphaConsumer is Chainlinked, Ownable {\r\n    // solium-disable-next-line zeppelin/no-arithmetic-operations\r\n    uint256 constant private ORACLE_PAYMENT = 1 * LINK;\r\n    string constant public BASE_URL = \"http://api.wolframalpha.com/v1/result?i=\";\r\n\r\n    bytes32 public jobId;\r\n\r\n    event RequestFulfilled(\r\n        bytes32 indexed requestId,\r\n        bytes32 indexed hash,\r\n        int256 distance\r\n    );\r\n\r\n    event WolframAlphaQuery(\r\n        string url\r\n    );\r\n\r\n    mapping(bytes32 => bytes32) requests;\r\n    mapping(bytes32 => int256) public distances;\r\n\r\n    constructor(address _token, address _oracle, bytes32 _jobId) public {\r\n        setLinkToken(_token);\r\n        setOracle(_oracle);\r\n        jobId = _jobId;\r\n    }\r\n\r\n    /**\r\n        @dev Request the distance between two location in miles\r\n        @param _from The location from, eg: London\r\n        @param _to The location to, eg: Sydney\r\n    */\r\n    function requestDistance(string _from, string _to) public {\r\n        string memory query = string(abi.encodePacked(\"What's the distance between \", _from, \" and \", _to, \"?\"));\r\n        Chainlink.Request memory req = newRequest(jobId, this, this.fulfill.selector);\r\n        req.add(\"query\", query);\r\n        req.addInt(\"index\", 1);\r\n        req.add(\"copyPath\", \"result\");\r\n        bytes32 requestId = chainlinkRequest(req, ORACLE_PAYMENT);\r\n        requests[requestId] = keccak256(abi.encodePacked(_from, _to));\r\n\r\n        emit WolframAlphaQuery(string(abi.encodePacked(BASE_URL, query)));\r\n    }\r\n\r\n    function cancelRequest(\r\n        bytes32 _requestId,\r\n        uint256 _payment,\r\n        bytes4 _callbackFunctionId,\r\n        uint256 _expiration\r\n    )\r\n    public\r\n    onlyOwner\r\n    {\r\n        cancelChainlinkRequest(_requestId, _payment, _callbackFunctionId, _expiration);\r\n    }\r\n\r\n    function fulfill(bytes32 _requestId, int256 _distance)\r\n    public\r\n    recordChainlinkFulfillment(_requestId)\r\n    {\r\n        emit RequestFulfilled(_requestId, requests[_requestId], _distance);\r\n        distances[requests[_requestId]] = _distance;\r\n        delete requests[_requestId];\r\n    }\r\n\r\n}\r\n",
-  "sourcePath": "/home/jonny/dev/linkpool/example-chainlinks/contracts/WolframAlphaConsumer.sol",
+  "metadata": "{\"compiler\":{\"version\":\"0.4.24+commit.e67f0147\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"constant\":false,\"inputs\":[{\"name\":\"_query\",\"type\":\"string\"},{\"name\":\"_index\",\"type\":\"uint8\"}],\"name\":\"requestAnswer\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"BASE_URL\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"\",\"type\":\"bytes32\"}],\"name\":\"answers\",\"outputs\":[{\"name\":\"\",\"type\":\"int256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_requestId\",\"type\":\"bytes32\"},{\"name\":\"_answer\",\"type\":\"int256\"}],\"name\":\"fulfill\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"jobId\",\"outputs\":[{\"name\":\"\",\"type\":\"bytes32\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_requestId\",\"type\":\"bytes32\"},{\"name\":\"_payment\",\"type\":\"uint256\"},{\"name\":\"_callbackFunctionId\",\"type\":\"bytes4\"},{\"name\":\"_expiration\",\"type\":\"uint256\"}],\"name\":\"cancelRequest\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"_token\",\"type\":\"address\"},{\"name\":\"_oracle\",\"type\":\"address\"},{\"name\":\"_jobId\",\"type\":\"bytes32\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"requestId\",\"type\":\"bytes32\"},{\"indexed\":true,\"name\":\"hash\",\"type\":\"bytes32\"},{\"indexed\":false,\"name\":\"answer\",\"type\":\"int256\"}],\"name\":\"RequestFulfilled\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"name\":\"url\",\"type\":\"string\"}],\"name\":\"WolframAlphaQuery\",\"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\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"id\",\"type\":\"bytes32\"}],\"name\":\"ChainlinkRequested\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"id\",\"type\":\"bytes32\"}],\"name\":\"ChainlinkFulfilled\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"id\",\"type\":\"bytes32\"}],\"name\":\"ChainlinkCancelled\",\"type\":\"event\"}],\"devdoc\":{\"methods\":{\"renounceOwnership()\":{\"details\":\"Allows the current owner to relinquish control of the contract.\"},\"requestAnswer(string,uint8)\":{\"details\":\"Request an answer to a query\\r\",\"params\":{\"_query\":\"query to request answer for\\r\"}},\"transferOwnership(address)\":{\"details\":\"Allows the current owner to transfer control of the contract to a newOwner.\",\"params\":{\"_newOwner\":\"The address to transfer ownership to.\"}}}},\"userdoc\":{\"methods\":{\"renounceOwnership()\":{\"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.\"}}}},\"settings\":{\"compilationTarget\":{\"/home/christian/LinkPool/example-chainlinks/contracts/WolframAlphaConsumer.sol\":\"WolframAlphaConsumer\"},\"evmVersion\":\"byzantium\",\"libraries\":{},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"/home/christian/LinkPool/example-chainlinks/contracts/WolframAlphaConsumer.sol\":{\"keccak256\":\"0xc9d61a295f2b4837d9c8af6e124ddc7301aac804bc61a093faf5a2282befe701\",\"urls\":[\"bzzr://7a18355111e05abc800405633b0e02d936186c43a979b84443278c469b2316ca\"]},\"@ensdomains/buffer/contracts/Buffer.sol\":{\"keccak256\":\"0x1264adbd06f6e05b04539bb225063a988b7fa90343d068de60cdde6cfb6fa92d\",\"urls\":[\"bzzr://8f1cb39e242b73bb7fac1f48bf0380ccccad14f06aae9cf4f87329cc78186122\"]},\"chainlink/contracts/Chainlink.sol\":{\"keccak256\":\"0xb4025da009238c87783f1b6c93a1349cfd472c326a72db9b741cea1b8e63341d\",\"urls\":[\"bzzr://9f9baf01775beaa7f8b38326a0d229c16f14a2d72dc431cee27a27e0f9a2933c\"]},\"chainlink/contracts/ChainlinkClient.sol\":{\"keccak256\":\"0xafa32ade3a9ac9895ed7446bcf965c38a89d4b0a8c710997cb94691bdccef281\",\"urls\":[\"bzzr://2132f5b3488a94e79948484c61eec1571862784f30625d10dcb8bc46177f9674\"]},\"chainlink/contracts/Chainlinked.sol\":{\"keccak256\":\"0x114e9ee7ddf4bbb28437048f41e4fff86fd81bbd4c785a55d33ac291d42cc14c\",\"urls\":[\"bzzr://33ffe7413657c0835206d3d4602ffb96f0d7046f44725efb4413304b054f7735\"]},\"chainlink/contracts/ENSResolver.sol\":{\"keccak256\":\"0x08965df63f00cb8d164d6fc36a0c388740725906b0bfb79b17391d5dfeabf683\",\"urls\":[\"bzzr://0700cb12e032ed8ed8327e446dfd805ae9fa28785a2909a73def511fe374b8cd\"]},\"chainlink/contracts/interfaces/ChainlinkRequestInterface.sol\":{\"keccak256\":\"0xd8aad4b502fd09cc1084f587eb4c707015fa1f8bdd7ad94eb570d8f9119883e4\",\"urls\":[\"bzzr://98d93046072cf8f44dcd23cf5af979931994535b0db741b6ef2381aceaa991e4\"]},\"chainlink/contracts/interfaces/ENSInterface.sol\":{\"keccak256\":\"0xbe30be08ec79a31ea2659594dbeed92f54ecadaa08d9c36e10a619643666113c\",\"urls\":[\"bzzr://0d4ebb805c2ad34f6943030dfe3e57c70a17e33756ad2be22d816a34a468a685\"]},\"chainlink/contracts/interfaces/LinkTokenInterface.sol\":{\"keccak256\":\"0xe0feabb30a9326800bc42669f641f349d11653548cab0088df506254f146f95c\",\"urls\":[\"bzzr://d5ef0e0e6347c187c1f79f482f7c14e897929f4bcb6db06d96bec2005de48c57\"]},\"chainlink/contracts/interfaces/PointerInterface.sol\":{\"keccak256\":\"0x604ba06cf6c032443f87fd4e91f130c4c7707fdceedb0e5e9d2c525c29a8fdbf\",\"urls\":[\"bzzr://029dc129811b5f0baa68278647879d648ff6293e2e9ed396f3f2190b55f7c51b\"]},\"openzeppelin-solidity/contracts/math/SafeMath.sol\":{\"keccak256\":\"0xa1c5e1d9ebbf654d332ca8e7a5c04a6a6a9d142eeaab3b988c2c909c81a62bef\",\"urls\":[\"bzzr://d062fb4a1b6de1f036ee0e73364a2532c4757eb68e95dd8c5cbb2d17b8732c6a\"]},\"openzeppelin-solidity/contracts/ownership/Ownable.sol\":{\"keccak256\":\"0x84c7090c27cf3657b73d9e26b6b316975fa0bd233b8169f254de0c3b3acfaefc\",\"urls\":[\"bzzr://b983355647976c1daa5de581a1b6a41be9c5adc17cce257b8679649db78f8a11\"]},\"solidity-cborutils/contracts/CBOR.sol\":{\"keccak256\":\"0x9f47b2ee2a7f5d83611f1fdf35b7336fe2a3277825e7c9a9463205584dbaf84f\",\"urls\":[\"bzzr://049fe9b102ae7958387a2f5194270d6477830bdc81d5d204f8a285963de7a3b5\"]}},\"version\":1}",
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+  "source": "pragma solidity ^0.4.24;\r\n\r\nimport \"openzeppelin-solidity/contracts/ownership/Ownable.sol\";\r\nimport \"chainlink/contracts/Chainlinked.sol\";\r\n\r\n/**\r\n    @dev WolframAlpha Short Answers API Docs: https://products.wolframalpha.com/short-answers-api/documentation/\r\n*/\r\ncontract WolframAlphaConsumer is Chainlinked, Ownable {\r\n    // solium-disable-next-line zeppelin/no-arithmetic-operations\r\n    uint256 constant private ORACLE_PAYMENT = 1 * LINK;\r\n    string constant public BASE_URL = \"http://api.wolframalpha.com/v1/result?i=\";\r\n\r\n    bytes32 public jobId;\r\n\r\n    event RequestFulfilled(\r\n        bytes32 indexed requestId,\r\n        bytes32 indexed hash,\r\n        int256 answer\r\n    );\r\n\r\n    event WolframAlphaQuery(\r\n        string url\r\n    );\r\n\r\n    mapping(bytes32 => bytes32) requests;\r\n    mapping(bytes32 => int256) public answers;\r\n\r\n    constructor(address _token, address _oracle, bytes32 _jobId) public {\r\n        setLinkToken(_token);\r\n        setOracle(_oracle);\r\n        jobId = _jobId;\r\n    }\r\n\r\n    /**\r\n        @dev Request an answer to a query\r\n        @param _query query to request answer for\r\n    */\r\n    function requestAnswer(string _query, uint8 _index) public {\r\n        Chainlink.Request memory req = newRequest(jobId, this, this.fulfill.selector);\r\n        req.add(\"query\", _query);\r\n        req.addInt(\"index\", _index);\r\n        req.add(\"copyPath\", \"result\");\r\n        bytes32 requestId = chainlinkRequest(req, ORACLE_PAYMENT);\r\n        requests[requestId] = keccak256(abi.encodePacked(_query));\r\n\r\n        emit WolframAlphaQuery(string(abi.encodePacked(BASE_URL, formatUrl(_query))));\r\n    }\r\n\r\n    function cancelRequest(\r\n        bytes32 _requestId,\r\n        uint256 _payment,\r\n        bytes4 _callbackFunctionId,\r\n        uint256 _expiration\r\n    )\r\n    public\r\n    onlyOwner\r\n    {\r\n        cancelChainlinkRequest(_requestId, _payment, _callbackFunctionId, _expiration);\r\n    }\r\n\r\n    function fulfill(bytes32 _requestId, int256 _answer)\r\n    public\r\n    recordChainlinkFulfillment(_requestId)\r\n    {\r\n        emit RequestFulfilled(_requestId, requests[_requestId], _answer);\r\n        answers[requests[_requestId]] = _answer;\r\n        delete requests[_requestId];\r\n    }\r\n\r\n    function formatUrl(string _url) private pure returns (string){\r\n      bytes memory urlBytes = bytes(_url);\r\n      bytes memory formatted = new bytes(urlBytes.length);\r\n      for(uint i = 0; i < urlBytes.length; i++) {\r\n        if (urlBytes[i] == \" \") {\r\n          formatted[i] = \"+\";\r\n        } else {\r\n          formatted[i] = urlBytes[i];\r\n        }\r\n      }\r\n      return string(formatted);\r\n    }\r\n\r\n}\r\n",
+  "sourcePath": "/home/christian/LinkPool/example-chainlinks/contracts/WolframAlphaConsumer.sol",
   "ast": {
-    "absolutePath": "/home/jonny/dev/linkpool/example-chainlinks/contracts/WolframAlphaConsumer.sol",
+    "absolutePath": "/home/christian/LinkPool/example-chainlinks/contracts/WolframAlphaConsumer.sol",
     "exportedSymbols": {
       "WolframAlphaConsumer": [
-        1767
+        1810
       ]
     },
-    "id": 1768,
+    "id": 1811,
     "nodeType": "SourceUnit",
     "nodes": [
       {
-        "id": 1572,
+        "id": 1566,
         "literals": [
           "solidity",
           "^",
@@ -361,10 +297,10 @@
       {
         "absolutePath": "openzeppelin-solidity/contracts/ownership/Ownable.sol",
         "file": "openzeppelin-solidity/contracts/ownership/Ownable.sol",
-        "id": 1573,
+        "id": 1567,
         "nodeType": "ImportDirective",
-        "scope": 1768,
-        "sourceUnit": 3858,
+        "scope": 1811,
+        "sourceUnit": 4062,
         "src": "28:63:7",
         "symbolAliases": [],
         "unitAlias": ""
@@ -372,10 +308,10 @@
       {
         "absolutePath": "chainlink/contracts/Chainlinked.sol",
         "file": "chainlink/contracts/Chainlinked.sol",
-        "id": 1574,
+        "id": 1568,
         "nodeType": "ImportDirective",
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@@ -882,39 +651,122 @@
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@@ -924,18 +776,18 @@
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@@ -1121,11 +973,11 @@
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@@ -1133,10 +985,10 @@
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@@ -1146,91 +998,54 @@
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@@ -1257,14 +1072,14 @@
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+                          "typeIdentifier": "t_contract$_WolframAlphaConsumer_$1810",
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                               "typeString": "contract WolframAlphaConsumer"
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@@ -1321,7 +1136,7 @@
                           "typeString": "bytes32"
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                         {
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+                          "typeIdentifier": "t_string_memory_ptr",
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@@ -1573,38 +1215,38 @@
                           "typeString": "literal_string \"query\""
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                         {
-                          "typeIdentifier": "t_string_memory",
+                          "typeIdentifier": "t_string_memory_ptr",
                           "typeString": "string memory"
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+                          "typeIdentifier": "t_struct$_Request_$2304_memory_ptr",
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+                        "typeIdentifier": "t_function_internal_pure$_t_struct$_Request_$2304_memory_ptr_$_t_string_memory_ptr_$_t_string_memory_ptr_$returns$__$bound_to$_t_struct$_Request_$2304_memory_ptr_$",
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-                          "typeString": "int_const 1"
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+                          "typeIdentifier": "t_uint8",
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@@ -1670,38 +1307,38 @@
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-                          "typeString": "int_const 1"
+                          "typeIdentifier": "t_uint8",
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-                          "typeIdentifier": "t_struct$_Request_$1952_memory_ptr",
+                          "typeIdentifier": "t_struct$_Request_$2304_memory_ptr",
                           "typeString": "struct Chainlink.Request memory"
                         }
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+                        "typeIdentifier": "t_function_internal_pure$_t_struct$_Request_$2304_memory_ptr_$_t_string_memory_ptr_$_t_int256_$returns$__$bound_to$_t_struct$_Request_$2304_memory_ptr_$",
                         "typeString": "function (struct Chainlink.Request memory,string memory,int256) pure"
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@@ -1709,15 +1346,15 @@
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                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "1326:22:6",
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@@ -1726,14 +1363,14 @@
                       {
                         "argumentTypes": null,
                         "hexValue": "636f707950617468",
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                         "kind": "string",
                         "lValueRequested": false,
                         "nodeType": "Literal",
-                        "src": "1367:10:6",
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@@ -1744,14 +1381,14 @@
                       {
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                         "kind": "string",
                         "lValueRequested": false,
                         "nodeType": "Literal",
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@@ -1773,32 +1410,32 @@
                       ],
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-                        "referencedDeclaration": 1345,
-                        "src": "1359:3:6",
+                        "referencedDeclaration": 1634,
+                        "src": "1357:3:7",
                         "typeDescriptions": {
-                          "typeIdentifier": "t_struct$_Request_$1952_memory_ptr",
+                          "typeIdentifier": "t_struct$_Request_$2304_memory_ptr",
                           "typeString": "struct Chainlink.Request memory"
                         }
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-                        "typeIdentifier": "t_function_internal_pure$_t_struct$_Request_$1952_memory_ptr_$_t_string_memory_ptr_$_t_string_memory_ptr_$returns$__$bound_to$_t_struct$_Request_$1952_memory_ptr_$",
+                        "typeIdentifier": "t_function_internal_pure$_t_struct$_Request_$2304_memory_ptr_$_t_string_memory_ptr_$_t_string_memory_ptr_$returns$__$bound_to$_t_struct$_Request_$2304_memory_ptr_$",
                         "typeString": "function (struct Chainlink.Request memory,string memory,string memory) pure"
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@@ -1806,28 +1443,28 @@
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                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "1359:29:6",
+                    "src": "1357:29:7",
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                       "typeString": "tuple()"
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+                    1665
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+                      "id": 1665,
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-                      "src": "1399:17:6",
+                      "scope": 1695,
+                      "src": "1397:17:7",
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@@ -1835,10 +1472,10 @@
                         "typeString": "bytes32"
                       },
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-                        "id": 1384,
+                        "id": 1664,
                         "name": "bytes32",
                         "nodeType": "ElementaryTypeName",
-                        "src": "1399:7:6",
+                        "src": "1397:7:7",
                         "typeDescriptions": {
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                           "typeString": "bytes32"
@@ -1848,64 +1485,31 @@
                       "visibility": "internal"
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                       {
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-                          "referencedDeclaration": 2268,
-                          "src": "1153:13:6",
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-                            "typeString": "function () view returns (address)"
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-                        "typeDescriptions": {
-                          "typeIdentifier": "t_struct$_Request_$1952_memory_ptr",
-                          "typeString": "struct Chainlink.Request memory"
-                        },
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                         "name": "req",
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                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
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+                        "src": "1434:3:7",
                         "typeDescriptions": {
-                          "typeIdentifier": "t_uint256",
-                          "typeString": "uint256"
+                          "typeIdentifier": "t_struct$_Request_$2304_memory_ptr",
+                          "typeString": "struct Chainlink.Request memory"
                         }
                       },
                       {
                         "argumentTypes": null,
-                        "id": 1233,
+                        "id": 1668,
                         "name": "ORACLE_PAYMENT",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1140,
-                        "src": "1175:14:6",
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                         "typeDescriptions": {
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
@@ -1915,30 +1519,26 @@
                     "expression": {
                       "argumentTypes": [
                         {
-                          "typeIdentifier": "t_struct$_Request_$1952_memory_ptr",
+                          "typeIdentifier": "t_struct$_Request_$2304_memory_ptr",
                           "typeString": "struct Chainlink.Request memory"
                         },
-                        {
-                          "typeIdentifier": "t_uint256",
-                          "typeString": "uint256"
-                        },
                         {
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
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                       "typeDescriptions": {
-                        "typeIdentifier": "t_function_internal_nonpayable$_t_struct$_Request_$1952_memory_ptr_$_t_uint256_$returns$_t_bytes32_$",
+                        "typeIdentifier": "t_function_internal_nonpayable$_t_struct$_Request_$2304_memory_ptr_$_t_uint256_$returns$_t_bytes32_$",
                         "typeString": "function (struct Chainlink.Request memory,uint256) returns (bytes32)"
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@@ -1946,19 +1546,19 @@
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                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "1419:37:6",
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                       "typeString": "bytes32"
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@@ -1967,26 +1567,26 @@
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-                        "id": 1391,
+                        "id": 1671,
                         "name": "requests",
                         "nodeType": "Identifier",
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-                        "referencedDeclaration": 1309,
-                        "src": "1467:8:6",
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                           "typeString": "mapping(bytes32 => bytes32)"
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+                      "id": 1673,
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                         "name": "requestId",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1385,
-                        "src": "1476:9:6",
+                        "referencedDeclaration": 1665,
+                        "src": "1474:9:7",
                         "typeDescriptions": {
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                           "typeString": "bytes32"
@@ -1997,7 +1597,7 @@
                       "isPure": false,
                       "lValueRequested": true,
                       "nodeType": "IndexAccess",
-                      "src": "1467:19:6",
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                       "typeDescriptions": {
                         "typeIdentifier": "t_bytes32",
                         "typeString": "bytes32"
@@ -2013,25 +1613,12 @@
                           "arguments": [
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-                              "name": "_from",
-                              "nodeType": "Identifier",
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-                                "typeString": "string memory"
-                              }
-                            },
-                            {
-                              "argumentTypes": null,
-                              "id": 1398,
-                              "name": "_to",
+                              "id": 1677,
+                              "name": "_query",
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-                              "src": "1523:3:6",
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                               "typeDescriptions": {
                                 "typeIdentifier": "t_string_memory_ptr",
                                 "typeString": "string memory"
@@ -2040,10 +1627,6 @@
                           ],
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-                              {
-                                "typeIdentifier": "t_string_memory_ptr",
-                                "typeString": "string memory"
-                              },
                               {
                                 "typeIdentifier": "t_string_memory_ptr",
                                 "typeString": "string memory"
@@ -2051,18 +1634,18 @@
                             ],
                             "expression": {
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-                              "id": 1395,
+                              "id": 1675,
                               "name": "abi",
                               "nodeType": "Identifier",
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-                              "referencedDeclaration": 3853,
-                              "src": "1499:3:6",
+                              "referencedDeclaration": 4366,
+                              "src": "1497:3:7",
                               "typeDescriptions": {
                                 "typeIdentifier": "t_magic_abi",
                                 "typeString": "abi"
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                             },
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@@ -2070,13 +1653,13 @@
                             "memberName": "encodePacked",
                             "nodeType": "MemberAccess",
                             "referencedDeclaration": null,
-                            "src": "1499:16:6",
+                            "src": "1497:16:7",
                             "typeDescriptions": {
                               "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$",
                               "typeString": "function () pure returns (bytes memory)"
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                           },
-                          "id": 1399,
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@@ -2084,7 +1667,7 @@
                           "lValueRequested": false,
                           "names": [],
                           "nodeType": "FunctionCall",
-                          "src": "1499:28:6",
+                          "src": "1497:24:7",
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                             "typeIdentifier": "t_bytes_memory_ptr",
                             "typeString": "bytes memory"
@@ -2098,18 +1681,18 @@
                             "typeString": "bytes memory"
                           }
                         ],
-                        "id": 1394,
+                        "id": 1674,
                         "name": "keccak256",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 3860,
-                        "src": "1489:9:6",
+                        "referencedDeclaration": 4373,
+                        "src": "1487:9:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_function_sha3_pure$__$returns$_t_bytes32_$",
                           "typeString": "function () pure returns (bytes32)"
                         }
                       },
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+                      "id": 1679,
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@@ -2117,43 +1700,240 @@
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                       "names": [],
                       "nodeType": "FunctionCall",
-                      "src": "1489:39:6",
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                         "typeIdentifier": "t_bytes32",
                         "typeString": "bytes32"
                       }
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-                    "src": "1467:61:6",
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                     "typeDescriptions": {
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                       "typeString": "bytes32"
                     }
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+                  "id": 1681,
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+                  "src": "1465:57:7"
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+                            "arguments": [
+                              {
+                                "argumentTypes": null,
+                                "id": 1686,
+                                "name": "BASE_URL",
+                                "nodeType": "Identifier",
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+                                "referencedDeclaration": 1580,
+                                "src": "1582:8:7",
+                                "typeDescriptions": {
+                                  "typeIdentifier": "t_string_memory",
+                                  "typeString": "string memory"
+                                }
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+                                "arguments": [
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+                                    "id": 1688,
+                                    "name": "_query",
+                                    "nodeType": "Identifier",
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+                                    "referencedDeclaration": 1626,
+                                    "src": "1602:6:7",
+                                    "typeDescriptions": {
+                                      "typeIdentifier": "t_string_memory_ptr",
+                                      "typeString": "string memory"
+                                    }
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+                                    {
+                                      "typeIdentifier": "t_string_memory_ptr",
+                                      "typeString": "string memory"
+                                    }
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+                                  "name": "formatUrl",
+                                  "nodeType": "Identifier",
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+                                  "referencedDeclaration": 1809,
+                                  "src": "1592:9:7",
+                                  "typeDescriptions": {
+                                    "typeIdentifier": "t_function_internal_pure$_t_string_memory_ptr_$returns$_t_string_memory_ptr_$",
+                                    "typeString": "function (string memory) pure returns (string memory)"
+                                  }
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+                                "src": "1592:17:7",
+                                "typeDescriptions": {
+                                  "typeIdentifier": "t_string_memory_ptr",
+                                  "typeString": "string memory"
+                                }
+                              }
+                            ],
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+                                {
+                                  "typeIdentifier": "t_string_memory",
+                                  "typeString": "string memory"
+                                },
+                                {
+                                  "typeIdentifier": "t_string_memory_ptr",
+                                  "typeString": "string memory"
+                                }
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+                                "name": "abi",
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+                                "referencedDeclaration": 4366,
+                                "src": "1565:3:7",
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+                                  "typeIdentifier": "t_magic_abi",
+                                  "typeString": "abi"
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+                              "src": "1565:16:7",
+                              "typeDescriptions": {
+                                "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$",
+                                "typeString": "function () pure returns (bytes memory)"
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+                            "typeDescriptions": {
+                              "typeIdentifier": "t_bytes_memory_ptr",
+                              "typeString": "bytes memory"
+                            }
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+                        ],
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+                              "typeString": "bytes memory"
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+                          "nodeType": "ElementaryTypeNameExpression",
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+                          "typeDescriptions": {
+                            "typeIdentifier": "t_type$_t_string_storage_ptr_$",
+                            "typeString": "type(string storage pointer)"
+                          },
+                          "typeName": "string"
+                        },
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+                        "isConstant": false,
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+                        "isPure": false,
+                        "kind": "typeConversion",
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+                        "names": [],
+                        "nodeType": "FunctionCall",
+                        "src": "1558:53:7",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_string_memory",
+                          "typeString": "string memory"
+                        }
+                      }
+                    ],
+                    "expression": {
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+                        {
+                          "typeIdentifier": "t_string_memory",
+                          "typeString": "string memory"
+                        }
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+                      "id": 1682,
+                      "name": "WolframAlphaQuery",
+                      "nodeType": "Identifier",
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+                      "referencedDeclaration": 1594,
+                      "src": "1540:17:7",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_function_event_nonpayable$_t_string_memory_ptr_$returns$__$",
+                        "typeString": "function (string memory)"
+                      }
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+                    "names": [],
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+                  "nodeType": "EmitStatement",
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                 }
               ]
             },
-            "documentation": "@dev Request the distance between two location in miles\r\n@param _from The location from, eg: London\r\n@param _to The location to, eg: Sydney\r",
-            "id": 1608,
+            "documentation": "@dev Request an answer to a query\r\n@param _query query to request answer for\r",
+            "id": 1695,
             "implemented": true,
             "isConstructor": false,
             "isDeclaredConst": false,
             "modifiers": [],
-            "name": "distances",
-            "nodeType": "VariableDeclaration",
+            "name": "requestAnswer",
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             "parameters": {
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               "parameters": [
                 {
                   "constant": false,
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+                  "name": "_query",
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-                  "src": "1083:12:6",
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@@ -2161,10 +1941,10 @@
                     "typeString": "string"
                   },
                   "typeName": {
-                    "id": 1336,
+                    "id": 1625,
                     "name": "string",
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                       "typeIdentifier": "t_string_storage_ptr",
                       "typeString": "string"
@@ -2175,88 +1955,51 @@
                 },
                 {
                   "constant": false,
-                  "id": 1339,
-                  "name": "_to",
+                  "id": 1628,
+                  "name": "_index",
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-                  "src": "1097:10:6",
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                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
-                    "typeIdentifier": "t_string_memory_ptr",
-                    "typeString": "string"
+                    "typeIdentifier": "t_uint8",
+                    "typeString": "uint8"
                   },
                   "typeName": {
-                    "id": 1338,
-                    "name": "string",
+                    "id": 1627,
+                    "name": "uint8",
                     "nodeType": "ElementaryTypeName",
-                    "src": "1097:6:6",
+                    "src": "1164:5:7",
                     "typeDescriptions": {
-                      "typeIdentifier": "t_string_storage_ptr",
-                      "typeString": "string"
+                      "typeIdentifier": "t_uint8",
+                      "typeString": "uint8"
                     }
                   },
                   "value": null,
                   "visibility": "internal"
                 }
               ],
-              "src": "1082:26:6"
+              "src": "1148:29:7"
             },
             "payable": false,
             "returnParameters": {
-              "id": 1341,
+              "id": 1630,
               "nodeType": "ParameterList",
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-              "src": "1116:0:6"
+              "src": "1185:0:7"
             },
-            "scope": 1767,
-            "src": "798:43:7",
+            "scope": 1810,
+            "src": "1126:494:7",
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-            "visibility": "public",
-            "constant": false,
-            "stateVariable": true,
-            "storageLocation": "default",
-            "typeDescriptions": {
-              "typeIdentifier": "t_mapping$_t_bytes32_$_t_int256_$",
-              "typeString": "mapping(bytes32 => int256)"
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-              "keyType": {
-                "id": 1605,
-                "name": "bytes32",
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-                "src": "806:7:7",
-                "typeDescriptions": {
-                  "typeIdentifier": "t_bytes32",
-                  "typeString": "bytes32"
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-              "typeDescriptions": {
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-                "typeString": "mapping(bytes32 => int256)"
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-                "typeDescriptions": {
-                  "typeIdentifier": "t_int256",
-                  "typeString": "int256"
-                }
-              }
-            },
-            "value": null
+            "visibility": "public"
           },
           {
             "body": {
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+              "id": 1715,
               "nodeType": "Block",
-              "src": "918:93:7",
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               "statements": [
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                   "expression": {
@@ -2264,25 +2007,25 @@
                     "arguments": [
                       {
                         "argumentTypes": null,
-                        "id": 1618,
-                        "name": "_token",
+                        "id": 1709,
+                        "name": "_requestId",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1610,
-                        "src": "942:6:7",
+                        "referencedDeclaration": 1697,
+                        "src": "1847:10:7",
                         "typeDescriptions": {
-                          "typeIdentifier": "t_address",
-                          "typeString": "address"
+                          "typeIdentifier": "t_bytes32",
+                          "typeString": "bytes32"
                         }
                       },
                       {
                         "argumentTypes": null,
-                        "id": 1419,
+                        "id": 1710,
                         "name": "_payment",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1408,
-                        "src": "1775:8:6",
+                        "referencedDeclaration": 1699,
+                        "src": "1859:8:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
@@ -2290,12 +2033,12 @@
                       },
                       {
                         "argumentTypes": null,
-                        "id": 1420,
+                        "id": 1711,
                         "name": "_callbackFunctionId",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1410,
-                        "src": "1785:19:6",
+                        "referencedDeclaration": 1701,
+                        "src": "1869:19:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_bytes4",
                           "typeString": "bytes4"
@@ -2303,12 +2046,12 @@
                       },
                       {
                         "argumentTypes": null,
-                        "id": 1421,
+                        "id": 1712,
                         "name": "_expiration",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1412,
-                        "src": "1806:11:6",
+                        "referencedDeclaration": 1703,
+                        "src": "1890:11:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
@@ -2318,8 +2061,8 @@
                     "expression": {
                       "argumentTypes": [
                         {
-                          "typeIdentifier": "t_address",
-                          "typeString": "address"
+                          "typeIdentifier": "t_bytes32",
+                          "typeString": "bytes32"
                         },
                         {
                           "typeIdentifier": "t_uint256",
@@ -2334,18 +2077,18 @@
                           "typeString": "uint256"
                         }
                       ],
-                      "id": 1617,
-                      "name": "setLinkToken",
+                      "id": 1708,
+                      "name": "cancelChainlinkRequest",
                       "nodeType": "Identifier",
                       "overloadedDeclarations": [],
-                      "referencedDeclaration": 2712,
-                      "src": "929:12:7",
+                      "referencedDeclaration": 2735,
+                      "src": "1824:22:7",
                       "typeDescriptions": {
-                        "typeIdentifier": "t_function_internal_nonpayable$_t_address_$returns$__$",
-                        "typeString": "function (address)"
+                        "typeIdentifier": "t_function_internal_nonpayable$_t_bytes32_$_t_uint256_$_t_bytes4_$_t_uint256_$returns$__$",
+                        "typeString": "function (bytes32,uint256,bytes4,uint256)"
                       }
                     },
-                    "id": 1619,
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                     "isConstant": false,
                     "isLValue": false,
                     "isPure": false,
@@ -2353,171 +2096,71 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "929:20:7",
+                    "src": "1824:78:7",
                     "typeDescriptions": {
                       "typeIdentifier": "t_tuple$__$",
                       "typeString": "tuple()"
                     }
                   },
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-                        "src": "970:7:7",
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-                          "typeIdentifier": "t_address",
-                          "typeString": "address"
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-                          "typeIdentifier": "t_address",
-                          "typeString": "address"
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-                      "typeString": "bytes32"
-                    }
-                  },
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-                  "nodeType": "ExpressionStatement",
-                  "src": "989:14:7"
+                  "src": "1824:78:7"
                 }
               ]
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             "implemented": true,
-            "isConstructor": true,
+            "isConstructor": false,
             "isDeclaredConst": false,
             "modifiers": [
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                 "arguments": null,
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+                "id": 1706,
                 "modifierName": {
                   "argumentTypes": null,
-                  "id": 1414,
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                   "name": "onlyOwner",
                   "nodeType": "Identifier",
                   "overloadedDeclarations": [],
-                  "referencedDeclaration": 3496,
-                  "src": "1714:9:6",
+                  "referencedDeclaration": 4009,
+                  "src": "1798:9:7",
                   "typeDescriptions": {
                     "typeIdentifier": "t_modifier$__$",
                     "typeString": "modifier ()"
                   }
                 },
                 "nodeType": "ModifierInvocation",
-                "src": "1714:9:6"
+                "src": "1798:9:7"
               }
             ],
-            "name": "",
+            "name": "cancelRequest",
             "nodeType": "FunctionDefinition",
             "parameters": {
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+              "id": 1704,
               "nodeType": "ParameterList",
               "parameters": [
                 {
                   "constant": false,
-                  "id": 1610,
-                  "name": "_token",
+                  "id": 1697,
+                  "name": "_requestId",
                   "nodeType": "VariableDeclaration",
-                  "scope": 1630,
-                  "src": "862:14:7",
+                  "scope": 1716,
+                  "src": "1661:18:7",
                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
-                    "typeIdentifier": "t_address",
-                    "typeString": "address"
+                    "typeIdentifier": "t_bytes32",
+                    "typeString": "bytes32"
                   },
                   "typeName": {
-                    "id": 1609,
-                    "name": "address",
+                    "id": 1696,
+                    "name": "bytes32",
                     "nodeType": "ElementaryTypeName",
-                    "src": "862:7:7",
+                    "src": "1661:7:7",
                     "typeDescriptions": {
-                      "typeIdentifier": "t_address",
-                      "typeString": "address"
+                      "typeIdentifier": "t_bytes32",
+                      "typeString": "bytes32"
                     }
                   },
                   "value": null,
@@ -2525,25 +2168,25 @@
                 },
                 {
                   "constant": false,
-                  "id": 1612,
-                  "name": "_oracle",
+                  "id": 1699,
+                  "name": "_payment",
                   "nodeType": "VariableDeclaration",
-                  "scope": 1630,
-                  "src": "878:15:7",
+                  "scope": 1716,
+                  "src": "1690:16:7",
                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
-                    "typeIdentifier": "t_address",
-                    "typeString": "address"
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
                   },
                   "typeName": {
-                    "id": 1611,
-                    "name": "address",
+                    "id": 1698,
+                    "name": "uint256",
                     "nodeType": "ElementaryTypeName",
-                    "src": "878:7:7",
+                    "src": "1690:7:7",
                     "typeDescriptions": {
-                      "typeIdentifier": "t_address",
-                      "typeString": "address"
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
                     }
                   },
                   "value": null,
@@ -2551,25 +2194,25 @@
                 },
                 {
                   "constant": false,
-                  "id": 1614,
-                  "name": "_jobId",
+                  "id": 1701,
+                  "name": "_callbackFunctionId",
                   "nodeType": "VariableDeclaration",
-                  "scope": 1630,
-                  "src": "895:14:7",
+                  "scope": 1716,
+                  "src": "1717:26:7",
                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
-                    "typeIdentifier": "t_bytes32",
-                    "typeString": "bytes32"
+                    "typeIdentifier": "t_bytes4",
+                    "typeString": "bytes4"
                   },
                   "typeName": {
-                    "id": 1613,
-                    "name": "bytes32",
+                    "id": 1700,
+                    "name": "bytes4",
                     "nodeType": "ElementaryTypeName",
-                    "src": "895:7:7",
+                    "src": "1717:6:7",
                     "typeDescriptions": {
-                      "typeIdentifier": "t_bytes32",
-                      "typeString": "bytes32"
+                      "typeIdentifier": "t_bytes4",
+                      "typeString": "bytes4"
                     }
                   },
                   "value": null,
@@ -2577,11 +2220,11 @@
                 },
                 {
                   "constant": false,
-                  "id": 1412,
+                  "id": 1703,
                   "name": "_expiration",
                   "nodeType": "VariableDeclaration",
-                  "scope": 1425,
-                  "src": "1670:19:6",
+                  "scope": 1716,
+                  "src": "1754:19:7",
                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
@@ -2589,10 +2232,10 @@
                     "typeString": "uint256"
                   },
                   "typeName": {
-                    "id": 1411,
+                    "id": 1702,
                     "name": "uint256",
                     "nodeType": "ElementaryTypeName",
-                    "src": "1670:7:6",
+                    "src": "1754:7:7",
                     "typeDescriptions": {
                       "typeIdentifier": "t_uint256",
                       "typeString": "uint256"
@@ -2602,26 +2245,26 @@
                   "visibility": "internal"
                 }
               ],
-              "src": "861:49:7"
+              "src": "1650:130:7"
             },
             "payable": false,
             "returnParameters": {
-              "id": 1616,
+              "id": 1707,
               "nodeType": "ParameterList",
               "parameters": [],
-              "src": "918:0:7"
+              "src": "1813:0:7"
             },
-            "scope": 1767,
-            "src": "850:161:7",
+            "scope": 1810,
+            "src": "1628:282:7",
             "stateMutability": "nonpayable",
             "superFunction": null,
             "visibility": "public"
           },
           {
             "body": {
-              "id": 1712,
+              "id": 1747,
               "nodeType": "Block",
-              "src": "1259:536:7",
+              "src": "2032:171:7",
               "statements": [
                 {
                   "eventCall": {
@@ -2629,12 +2272,12 @@
                     "arguments": [
                       {
                         "argumentTypes": null,
-                        "id": 1436,
+                        "id": 1727,
                         "name": "_requestId",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1427,
-                        "src": "1983:10:6",
+                        "referencedDeclaration": 1718,
+                        "src": "2065:10:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_bytes32",
                           "typeString": "bytes32"
@@ -2642,37 +2285,28 @@
                       },
                       {
                         "argumentTypes": null,
-                        "id": 1439,
-                        "name": "_distance",
-                        "nodeType": "IndexAccess",
-                        "overloadedDeclarations": [],
-                        "referencedDeclaration": 1108,
-                        "src": "1995:20:6",
-                        "typeDescriptions": {
-                          "typeIdentifier": "t_bytes32",
-                          "typeString": "bytes32"
-                        },
                         "baseExpression": {
                           "argumentTypes": null,
-                          "id": 1437,
+                          "id": 1728,
                           "name": "requests",
                           "nodeType": "Identifier",
                           "overloadedDeclarations": [],
-                          "referencedDeclaration": 1309,
-                          "src": "1995:8:6",
+                          "referencedDeclaration": 1598,
+                          "src": "2077:8:7",
                           "typeDescriptions": {
                             "typeIdentifier": "t_mapping$_t_bytes32_$_t_bytes32_$",
                             "typeString": "mapping(bytes32 => bytes32)"
                           }
                         },
+                        "id": 1730,
                         "indexExpression": {
                           "argumentTypes": null,
-                          "id": 1438,
+                          "id": 1729,
                           "name": "_requestId",
                           "nodeType": "Identifier",
                           "overloadedDeclarations": [],
-                          "referencedDeclaration": 1427,
-                          "src": "2004:10:6",
+                          "referencedDeclaration": 1718,
+                          "src": "2086:10:7",
                           "typeDescriptions": {
                             "typeIdentifier": "t_bytes32",
                             "typeString": "bytes32"
@@ -2681,16 +2315,22 @@
                         "isConstant": false,
                         "isLValue": true,
                         "isPure": false,
-                        "lValueRequested": false
+                        "lValueRequested": false,
+                        "nodeType": "IndexAccess",
+                        "src": "2077:20:7",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_bytes32",
+                          "typeString": "bytes32"
+                        }
                       },
                       {
                         "argumentTypes": null,
-                        "id": 1440,
-                        "name": "_distance",
+                        "id": 1731,
+                        "name": "_answer",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1429,
-                        "src": "2017:9:6",
+                        "referencedDeclaration": 1720,
+                        "src": "2099:7:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_int256",
                           "typeString": "int256"
@@ -2712,18 +2352,18 @@
                           "typeString": "int256"
                         }
                       ],
-                      "id": 1435,
+                      "id": 1726,
                       "name": "RequestFulfilled",
                       "nodeType": "Identifier",
                       "overloadedDeclarations": [],
-                      "referencedDeclaration": 1305,
-                      "src": "1966:16:6",
+                      "referencedDeclaration": 1590,
+                      "src": "2048:16:7",
                       "typeDescriptions": {
                         "typeIdentifier": "t_function_event_nonpayable$_t_bytes32_$_t_bytes32_$_t_int256_$returns$__$",
                         "typeString": "function (bytes32,bytes32,int256)"
                       }
                     },
-                    "id": 1441,
+                    "id": 1732,
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                     "isLValue": false,
                     "isPure": false,
@@ -2731,292 +2371,152 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "1966:61:6",
+                    "src": "2048:59:7",
                     "typeDescriptions": {
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                       "typeString": "tuple()"
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-                      "src": "1270:19:7",
-                      "stateVariable": false,
-                      "storageLocation": "memory",
-                      "typeDescriptions": {
-                        "typeIdentifier": "t_string_memory_ptr",
-                        "typeString": "string"
+                  "id": 1733,
+                  "nodeType": "EmitStatement",
+                  "src": "2043:64:7"
+                },
+                {
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+                    "isConstant": false,
+                    "isLValue": false,
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+                    "lValueRequested": false,
+                    "leftHandSide": {
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+                      "baseExpression": {
+                        "argumentTypes": null,
+                        "id": 1734,
+                        "name": "answers",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 1602,
+                        "src": "2118:7:7",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_mapping$_t_bytes32_$_t_int256_$",
+                          "typeString": "mapping(bytes32 => int256)"
+                        }
                       },
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-                        "id": 1637,
-                        "name": "string",
-                        "nodeType": "ElementaryTypeName",
-                        "src": "1270:6:7",
+                      "id": 1738,
+                      "indexExpression": {
+                        "argumentTypes": null,
+                        "baseExpression": {
+                          "argumentTypes": null,
+                          "id": 1735,
+                          "name": "requests",
+                          "nodeType": "Identifier",
+                          "overloadedDeclarations": [],
+                          "referencedDeclaration": 1598,
+                          "src": "2126:8:7",
+                          "typeDescriptions": {
+                            "typeIdentifier": "t_mapping$_t_bytes32_$_t_bytes32_$",
+                            "typeString": "mapping(bytes32 => bytes32)"
+                          }
+                        },
+                        "id": 1737,
+                        "indexExpression": {
+                          "argumentTypes": null,
+                          "id": 1736,
+                          "name": "_requestId",
+                          "nodeType": "Identifier",
+                          "overloadedDeclarations": [],
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-                          "typeString": "struct Chainlink.Request memory"
-                        }
-                      },
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                       "isConstant": false,
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-                      "isPure": false,
+                      "isLValue": false,
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                       "lValueRequested": false,
-                      "memberName": "add",
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-                      "referencedDeclaration": 2045,
-                      "src": "1359:7:6",
+                      "nodeType": "ElementaryTypeNameExpression",
+                      "src": "2305:5:7",
                       "typeDescriptions": {
-                        "typeIdentifier": "t_function_internal_pure$_t_struct$_Request_$1952_memory_ptr_$_t_string_memory_ptr_$_t_string_memory_ptr_$returns$__$bound_to$_t_struct$_Request_$1952_memory_ptr_$",
-                        "typeString": "function (struct Chainlink.Request memory,string memory,string memory) pure"
-                      }
+                        "typeIdentifier": "t_type$_t_bytes_storage_ptr_$",
+                        "typeString": "type(bytes storage pointer)"
+                      },
+                      "typeName": "bytes"
                     },
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                     "isConstant": false,
                     "isLValue": false,
                     "isPure": false,
-                    "kind": "functionCall",
+                    "kind": "typeConversion",
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "1359:29:6",
+                    "src": "2305:11:7",
                     "typeDescriptions": {
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-                      "typeString": "tuple()"
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+                      "typeString": "bytes memory"
                     }
                   },
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-                  "nodeType": "ExpressionStatement",
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+                  "src": "2281:35:7"
                 },
                 {
                   "assignments": [
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+                    1762
                   ],
                   "declarations": [
                     {
                       "constant": false,
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-                      "name": "requestId",
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-                      "storageLocation": "default",
+                      "storageLocation": "memory",
                       "typeDescriptions": {
-                        "typeIdentifier": "t_bytes32",
-                        "typeString": "bytes32"
+                        "typeIdentifier": "t_bytes_memory_ptr",
+                        "typeString": "bytes"
                       },
                       "typeName": {
-                        "id": 1384,
-                        "name": "bytes32",
+                        "id": 1761,
+                        "name": "bytes",
                         "nodeType": "ElementaryTypeName",
-                        "src": "1399:7:6",
+                        "src": "2325:5:7",
                         "typeDescriptions": {
-                          "typeIdentifier": "t_bytes32",
-                          "typeString": "bytes32"
+                          "typeIdentifier": "t_bytes_storage_ptr",
+                          "typeString": "bytes"
                         }
                       },
                       "value": null,
                       "visibility": "internal"
                     }
                   ],
-                  "id": 1390,
+                  "id": 1768,
                   "initialValue": {
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                     "arguments": [
                       {
                         "argumentTypes": null,
-                        "arguments": [],
                         "expression": {
-                          "argumentTypes": [],
-                          "id": 1230,
-                          "name": "oracleAddress",
+                          "argumentTypes": null,
+                          "id": 1765,
+                          "name": "urlBytes",
                           "nodeType": "Identifier",
                           "overloadedDeclarations": [],
-                          "referencedDeclaration": 2268,
-                          "src": "1153:13:6",
+                          "referencedDeclaration": 1756,
+                          "src": "2360:8:7",
                           "typeDescriptions": {
-                            "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$",
-                            "typeString": "function () view returns (address)"
+                            "typeIdentifier": "t_bytes_memory_ptr",
+                            "typeString": "bytes memory"
                           }
                         },
-                        "id": 1387,
+                        "id": 1766,
                         "isConstant": false,
                         "isLValue": false,
                         "isPure": false,
-                        "kind": "functionCall",
                         "lValueRequested": false,
-                        "names": [],
-                        "nodeType": "Identifier",
-                        "src": "1436:3:6",
-                        "typeDescriptions": {
-                          "typeIdentifier": "t_struct$_Request_$1952_memory_ptr",
-                          "typeString": "struct Chainlink.Request memory"
-                        },
-                        "name": "req",
-                        "overloadedDeclarations": [],
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-                      },
-                      {
-                        "argumentTypes": null,
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-                        "name": "ORACLE_PAYMENT",
-                        "nodeType": "Identifier",
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-                        "referencedDeclaration": 1295,
-                        "src": "1441:14:6",
-                        "typeDescriptions": {
-                          "typeIdentifier": "t_uint256",
-                          "typeString": "uint256"
-                        }
-                      },
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-                        "argumentTypes": null,
-                        "id": 1233,
-                        "name": "ORACLE_PAYMENT",
-                        "nodeType": "Identifier",
-                        "overloadedDeclarations": [],
-                        "referencedDeclaration": 1140,
-                        "src": "1175:14:6",
+                        "memberName": "length",
+                        "nodeType": "MemberAccess",
+                        "referencedDeclaration": null,
+                        "src": "2360:15:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
@@ -6338,31 +2819,34 @@
                     ],
                     "expression": {
                       "argumentTypes": [
-                        {
-                          "typeIdentifier": "t_struct$_Request_$1952_memory_ptr",
-                          "typeString": "struct Chainlink.Request memory"
-                        },
-                        {
-                          "typeIdentifier": "t_uint256",
-                          "typeString": "uint256"
-                        },
                         {
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
                         }
                       ],
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-                      "name": "chainlinkRequest",
-                      "nodeType": "Identifier",
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-                      "referencedDeclaration": 2285,
-                      "src": "1419:16:6",
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+                      "isLValue": false,
+                      "isPure": true,
+                      "lValueRequested": false,
+                      "nodeType": "NewExpression",
+                      "src": "2350:9:7",
                       "typeDescriptions": {
-                        "typeIdentifier": "t_function_internal_nonpayable$_t_struct$_Request_$1952_memory_ptr_$_t_uint256_$returns$_t_bytes32_$",
-                        "typeString": "function (struct Chainlink.Request memory,uint256) returns (bytes32)"
+                        "typeIdentifier": "t_function_objectcreation_pure$_t_uint256_$returns$_t_bytes_memory_$",
+                        "typeString": "function (uint256) pure returns (bytes memory)"
+                      },
+                      "typeName": {
+                        "id": 1763,
+                        "name": "bytes",
+                        "nodeType": "ElementaryTypeName",
+                        "src": "2354:5:7",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_bytes_storage_ptr",
+                          "typeString": "bytes"
+                        }
                       }
                     },
-                    "id": 1389,
+                    "id": 1767,
                     "isConstant": false,
                     "isLValue": false,
                     "isPure": false,
@@ -6370,422 +2854,449 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "1419:37:6",
+                    "src": "2350:26:7",
                     "typeDescriptions": {
-                      "typeIdentifier": "t_bytes32",
-                      "typeString": "bytes32"
+                      "typeIdentifier": "t_bytes_memory",
+                      "typeString": "bytes memory"
                     }
                   },
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-                  "src": "1399:57:6"
+                  "src": "2325:51:7"
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-                    "isConstant": false,
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-                        "argumentTypes": null,
-                        "id": 1391,
-                        "name": "requests",
-                        "nodeType": "Identifier",
-                        "overloadedDeclarations": [],
-                        "referencedDeclaration": 1309,
-                        "src": "1467:8:6",
-                        "typeDescriptions": {
-                          "typeIdentifier": "t_mapping$_t_bytes32_$_t_bytes32_$",
-                          "typeString": "mapping(bytes32 => bytes32)"
-                        }
-                      },
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-                      "indexExpression": {
-                        "argumentTypes": null,
-                        "id": 1392,
-                        "name": "requestId",
-                        "nodeType": "Identifier",
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-                        "referencedDeclaration": 1385,
-                        "src": "1476:9:6",
-                        "typeDescriptions": {
-                          "typeIdentifier": "t_bytes32",
-                          "typeString": "bytes32"
-                        }
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-                      "typeDescriptions": {
-                        "typeIdentifier": "t_bytes32",
-                        "typeString": "bytes32"
-                      }
-                    },
-                    "nodeType": "Assignment",
-                    "operator": "=",
-                    "rightHandSide": {
-                      "argumentTypes": null,
-                      "arguments": [
-                        {
+                  "body": {
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+                    "nodeType": "Block",
+                    "src": "2427:144:7",
+                    "statements": [
+                      {
+                        "condition": {
                           "argumentTypes": null,
-                          "arguments": [
-                            {
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+                            "typeString": "bytes1"
+                          },
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+                          "lValueRequested": false,
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                               "argumentTypes": null,
-                              "id": 1397,
-                              "name": "_from",
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+                              "name": "urlBytes",
                               "nodeType": "Identifier",
                               "overloadedDeclarations": [],
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-                              "src": "1516:5:6",
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+                              "src": "2442:8:7",
                               "typeDescriptions": {
-                                "typeIdentifier": "t_string_memory_ptr",
-                                "typeString": "string memory"
+                                "typeIdentifier": "t_bytes_memory_ptr",
+                                "typeString": "bytes memory"
                               }
                             },
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-                              "name": "_to",
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-                              "typeDescriptions": {
-                                "typeIdentifier": "t_string_memory_ptr",
-                                "typeString": "string memory"
-                              }
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-                                "typeIdentifier": "t_string_memory_ptr",
-                                "typeString": "string memory"
-                              },
-                              {
-                                "typeIdentifier": "t_string_memory_ptr",
-                                "typeString": "string memory"
-                              }
-                            ],
-                            "expression": {
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-                              "name": "abi",
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-                              "src": "1499:3:6",
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+                              "src": "2451:1:7",
                               "typeDescriptions": {
-                                "typeIdentifier": "t_magic_abi",
-                                "typeString": "abi"
+                                "typeIdentifier": "t_uint256",
+                                "typeString": "uint256"
                               }
                             },
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+                            "nodeType": "IndexAccess",
+                            "src": "2442:11:7",
+                            "typeDescriptions": {
+                              "typeIdentifier": "t_bytes1",
+                              "typeString": "bytes1"
+                            }
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+                          "operator": "==",
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+                            "hexValue": "20",
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                             "isConstant": false,
                             "isLValue": false,
                             "isPure": true,
+                            "kind": "string",
                             "lValueRequested": false,
-                            "memberName": "encodePacked",
-                            "nodeType": "MemberAccess",
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-                            "src": "1499:16:6",
+                            "nodeType": "Literal",
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+                            "subdenomination": null,
                             "typeDescriptions": {
-                              "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$",
-                              "typeString": "function () pure returns (bytes memory)"
-                            }
+                              "typeIdentifier": "t_stringliteral_681afa780d17da29203322b473d3f210a7d621259a4e6ce9e403f5a266ff719a",
+                              "typeString": "literal_string \" \""
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-                          "names": [],
-                          "nodeType": "FunctionCall",
-                          "src": "1499:28:6",
+                          "src": "2442:18:7",
                           "typeDescriptions": {
-                            "typeIdentifier": "t_bytes_memory_ptr",
-                            "typeString": "bytes memory"
+                            "typeIdentifier": "t_bool",
+                            "typeString": "bool"
                           }
+                        },
+                        "falseBody": {
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+                          "nodeType": "Block",
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+                                    "name": "formatted",
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+                                    "src": "2524:9:7",
+                                    "typeDescriptions": {
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+                                      "typeString": "bytes memory"
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+                                    "src": "2534:1:7",
+                                    "typeDescriptions": {
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+                                      "typeString": "uint256"
+                                    }
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+                                  "isPure": false,
+                                  "lValueRequested": true,
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+                                  "typeDescriptions": {
+                                    "typeIdentifier": "t_bytes1",
+                                    "typeString": "bytes1"
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+                                    "src": "2539:8:7",
+                                    "typeDescriptions": {
+                                      "typeIdentifier": "t_bytes_memory_ptr",
+                                      "typeString": "bytes memory"
+                                    }
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+                                      "typeString": "uint256"
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+                                  "nodeType": "IndexAccess",
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+                                  "typeDescriptions": {
+                                    "typeIdentifier": "t_bytes1",
+                                    "typeString": "bytes1"
+                                  }
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+                                "typeDescriptions": {
+                                  "typeIdentifier": "t_bytes1",
+                                  "typeString": "bytes1"
+                                }
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+                            }
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+                                      "typeString": "bytes memory"
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+                                      "typeString": "uint256"
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+                                  "nodeType": "IndexAccess",
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+                                  "typeDescriptions": {
+                                    "typeIdentifier": "t_bytes1",
+                                    "typeString": "bytes1"
+                                  }
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+                                  "hexValue": "2b",
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+                                    "typeString": "literal_string \"+\""
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+                                  "typeString": "bytes1"
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+                            }
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                         }
-                      ],
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                       "expression": {
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-                            "typeString": "bytes memory"
-                          }
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-                        "name": "keccak256",
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                         "nodeType": "Identifier",
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                         "typeDescriptions": {
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-                          "typeString": "function () pure returns (bytes32)"
+                          "typeIdentifier": "t_bytes_memory_ptr",
+                          "typeString": "bytes memory"
                         }
                       },
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                       "typeDescriptions": {
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@@ -6949,25 +3728,26 @@
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@@ -6975,179 +3755,211 @@
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@@ -7155,358 +3967,257 @@
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-                          "typeString": "int_const 1"
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@@ -7812,38 +4479,38 @@
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-                          "typeString": "int_const 1"
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+                        "typeIdentifier": "t_function_internal_pure$_t_struct$_Request_$2304_memory_ptr_$_t_string_memory_ptr_$_t_string_memory_ptr_$returns$__$bound_to$_t_struct$_Request_$2304_memory_ptr_$",
                         "typeString": "function (struct Chainlink.Request memory,string memory,string memory) pure"
                       }
                     },
-                    "id": 1681,
+                    "id": 1662,
                     "isConstant": false,
                     "isLValue": false,
                     "isPure": false,
@@ -7948,28 +4615,28 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "1540:29:7",
+                    "src": "1357:29:7",
                     "typeDescriptions": {
                       "typeIdentifier": "t_tuple$__$",
                       "typeString": "tuple()"
                     }
                   },
-                  "id": 1682,
+                  "id": 1663,
                   "nodeType": "ExpressionStatement",
-                  "src": "1540:29:7"
+                  "src": "1357:29:7"
                 },
                 {
                   "assignments": [
-                    1684
+                    1665
                   ],
                   "declarations": [
                     {
                       "constant": false,
-                      "id": 1684,
+                      "id": 1665,
                       "name": "requestId",
                       "nodeType": "VariableDeclaration",
-                      "scope": 1713,
-                      "src": "1580:17:7",
+                      "scope": 1695,
+                      "src": "1397:17:7",
                       "stateVariable": false,
                       "storageLocation": "default",
                       "typeDescriptions": {
@@ -7977,10 +4644,10 @@
                         "typeString": "bytes32"
                       },
                       "typeName": {
-                        "id": 1683,
+                        "id": 1664,
                         "name": "bytes32",
                         "nodeType": "ElementaryTypeName",
-                        "src": "1580:7:7",
+                        "src": "1397:7:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_bytes32",
                           "typeString": "bytes32"
@@ -7990,31 +4657,31 @@
                       "visibility": "internal"
                     }
                   ],
-                  "id": 1689,
+                  "id": 1670,
                   "initialValue": {
                     "argumentTypes": null,
                     "arguments": [
                       {
                         "argumentTypes": null,
-                        "id": 1686,
+                        "id": 1667,
                         "name": "req",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1653,
-                        "src": "1617:3:7",
+                        "referencedDeclaration": 1634,
+                        "src": "1434:3:7",
                         "typeDescriptions": {
-                          "typeIdentifier": "t_struct$_Request_$2261_memory_ptr",
+                          "typeIdentifier": "t_struct$_Request_$2304_memory_ptr",
                           "typeString": "struct Chainlink.Request memory"
                         }
                       },
                       {
                         "argumentTypes": null,
-                        "id": 1687,
+                        "id": 1668,
                         "name": "ORACLE_PAYMENT",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1583,
-                        "src": "1622:14:7",
+                        "referencedDeclaration": 1577,
+                        "src": "1439:14:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_uint256",
                           "typeString": "uint256"
@@ -8024,7 +4691,7 @@
                     "expression": {
                       "argumentTypes": [
                         {
-                          "typeIdentifier": "t_struct$_Request_$2261_memory_ptr",
+                          "typeIdentifier": "t_struct$_Request_$2304_memory_ptr",
                           "typeString": "struct Chainlink.Request memory"
                         },
                         {
@@ -8032,18 +4699,18 @@
                           "typeString": "uint256"
                         }
                       ],
-                      "id": 1685,
+                      "id": 1666,
                       "name": "chainlinkRequest",
                       "nodeType": "Identifier",
                       "overloadedDeclarations": [],
-                      "referencedDeclaration": 2594,
-                      "src": "1600:16:7",
+                      "referencedDeclaration": 3004,
+                      "src": "1417:16:7",
                       "typeDescriptions": {
-                        "typeIdentifier": "t_function_internal_nonpayable$_t_struct$_Request_$2261_memory_ptr_$_t_uint256_$returns$_t_bytes32_$",
+                        "typeIdentifier": "t_function_internal_nonpayable$_t_struct$_Request_$2304_memory_ptr_$_t_uint256_$returns$_t_bytes32_$",
                         "typeString": "function (struct Chainlink.Request memory,uint256) returns (bytes32)"
                       }
                     },
-                    "id": 1688,
+                    "id": 1669,
                     "isConstant": false,
                     "isLValue": false,
                     "isPure": false,
@@ -8051,19 +4718,19 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "1600:37:7",
+                    "src": "1417:37:7",
                     "typeDescriptions": {
                       "typeIdentifier": "t_bytes32",
                       "typeString": "bytes32"
                     }
                   },
                   "nodeType": "VariableDeclarationStatement",
-                  "src": "1580:57:7"
+                  "src": "1397:57:7"
                 },
                 {
                   "expression": {
                     "argumentTypes": null,
-                    "id": 1700,
+                    "id": 1680,
                     "isConstant": false,
                     "isLValue": false,
                     "isPure": false,
@@ -8072,26 +4739,26 @@
                       "argumentTypes": null,
                       "baseExpression": {
                         "argumentTypes": null,
-                        "id": 1690,
+                        "id": 1671,
                         "name": "requests",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1604,
-                        "src": "1648:8:7",
+                        "referencedDeclaration": 1598,
+                        "src": "1465:8:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_mapping$_t_bytes32_$_t_bytes32_$",
                           "typeString": "mapping(bytes32 => bytes32)"
                         }
                       },
-                      "id": 1692,
+                      "id": 1673,
                       "indexExpression": {
                         "argumentTypes": null,
-                        "id": 1691,
+                        "id": 1672,
                         "name": "requestId",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1684,
-                        "src": "1657:9:7",
+                        "referencedDeclaration": 1665,
+                        "src": "1474:9:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_bytes32",
                           "typeString": "bytes32"
@@ -8102,7 +4769,7 @@
                       "isPure": false,
                       "lValueRequested": true,
                       "nodeType": "IndexAccess",
-                      "src": "1648:19:7",
+                      "src": "1465:19:7",
                       "typeDescriptions": {
                         "typeIdentifier": "t_bytes32",
                         "typeString": "bytes32"
@@ -8115,28 +4782,15 @@
                       "arguments": [
                         {
                           "argumentTypes": null,
-                          "arguments": [
-                            {
-                              "argumentTypes": null,
-                              "id": 1696,
-                              "name": "_from",
-                              "nodeType": "Identifier",
-                              "overloadedDeclarations": [],
-                              "referencedDeclaration": 1632,
-                              "src": "1697:5:7",
-                              "typeDescriptions": {
-                                "typeIdentifier": "t_string_memory_ptr",
-                                "typeString": "string memory"
-                              }
-                            },
+                          "arguments": [
                             {
                               "argumentTypes": null,
-                              "id": 1697,
-                              "name": "_to",
+                              "id": 1677,
+                              "name": "_query",
                               "nodeType": "Identifier",
                               "overloadedDeclarations": [],
-                              "referencedDeclaration": 1634,
-                              "src": "1704:3:7",
+                              "referencedDeclaration": 1626,
+                              "src": "1514:6:7",
                               "typeDescriptions": {
                                 "typeIdentifier": "t_string_memory_ptr",
                                 "typeString": "string memory"
@@ -8145,10 +4799,6 @@
                           ],
                           "expression": {
                             "argumentTypes": [
-                              {
-                                "typeIdentifier": "t_string_memory_ptr",
-                                "typeString": "string memory"
-                              },
                               {
                                 "typeIdentifier": "t_string_memory_ptr",
                                 "typeString": "string memory"
@@ -8156,18 +4806,18 @@
                             ],
                             "expression": {
                               "argumentTypes": null,
-                              "id": 1694,
+                              "id": 1675,
                               "name": "abi",
                               "nodeType": "Identifier",
                               "overloadedDeclarations": [],
-                              "referencedDeclaration": 4162,
-                              "src": "1680:3:7",
+                              "referencedDeclaration": 4366,
+                              "src": "1497:3:7",
                               "typeDescriptions": {
                                 "typeIdentifier": "t_magic_abi",
                                 "typeString": "abi"
                               }
                             },
-                            "id": 1695,
+                            "id": 1676,
                             "isConstant": false,
                             "isLValue": false,
                             "isPure": true,
@@ -8175,13 +4825,13 @@
                             "memberName": "encodePacked",
                             "nodeType": "MemberAccess",
                             "referencedDeclaration": null,
-                            "src": "1680:16:7",
+                            "src": "1497:16:7",
                             "typeDescriptions": {
                               "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$",
                               "typeString": "function () pure returns (bytes memory)"
                             }
                           },
-                          "id": 1698,
+                          "id": 1678,
                           "isConstant": false,
                           "isLValue": false,
                           "isPure": false,
@@ -8189,7 +4839,7 @@
                           "lValueRequested": false,
                           "names": [],
                           "nodeType": "FunctionCall",
-                          "src": "1680:28:7",
+                          "src": "1497:24:7",
                           "typeDescriptions": {
                             "typeIdentifier": "t_bytes_memory_ptr",
                             "typeString": "bytes memory"
@@ -8203,18 +4853,18 @@
                             "typeString": "bytes memory"
                           }
                         ],
-                        "id": 1693,
+                        "id": 1674,
                         "name": "keccak256",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 4169,
-                        "src": "1670:9:7",
+                        "referencedDeclaration": 4373,
+                        "src": "1487:9:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_function_sha3_pure$__$returns$_t_bytes32_$",
                           "typeString": "function () pure returns (bytes32)"
                         }
                       },
-                      "id": 1699,
+                      "id": 1679,
                       "isConstant": false,
                       "isLValue": false,
                       "isPure": false,
@@ -8222,21 +4872,21 @@
                       "lValueRequested": false,
                       "names": [],
                       "nodeType": "FunctionCall",
-                      "src": "1670:39:7",
+                      "src": "1487:35:7",
                       "typeDescriptions": {
                         "typeIdentifier": "t_bytes32",
                         "typeString": "bytes32"
                       }
                     },
-                    "src": "1648:61:7",
+                    "src": "1465:57:7",
                     "typeDescriptions": {
                       "typeIdentifier": "t_bytes32",
                       "typeString": "bytes32"
                     }
                   },
-                  "id": 1701,
+                  "id": 1681,
                   "nodeType": "ExpressionStatement",
-                  "src": "1648:61:7"
+                  "src": "1465:57:7"
                 },
                 {
                   "eventCall": {
@@ -8250,12 +4900,12 @@
                             "arguments": [
                               {
                                 "argumentTypes": null,
-                                "id": 1706,
+                                "id": 1686,
                                 "name": "BASE_URL",
                                 "nodeType": "Identifier",
                                 "overloadedDeclarations": [],
-                                "referencedDeclaration": 1586,
-                                "src": "1769:8:7",
+                                "referencedDeclaration": 1580,
+                                "src": "1582:8:7",
                                 "typeDescriptions": {
                                   "typeIdentifier": "t_string_memory",
                                   "typeString": "string memory"
@@ -8263,12 +4913,48 @@
                               },
                               {
                                 "argumentTypes": null,
-                                "id": 1707,
-                                "name": "query",
-                                "nodeType": "Identifier",
-                                "overloadedDeclarations": [],
-                                "referencedDeclaration": 1638,
-                                "src": "1779:5:7",
+                                "arguments": [
+                                  {
+                                    "argumentTypes": null,
+                                    "id": 1688,
+                                    "name": "_query",
+                                    "nodeType": "Identifier",
+                                    "overloadedDeclarations": [],
+                                    "referencedDeclaration": 1626,
+                                    "src": "1602:6:7",
+                                    "typeDescriptions": {
+                                      "typeIdentifier": "t_string_memory_ptr",
+                                      "typeString": "string memory"
+                                    }
+                                  }
+                                ],
+                                "expression": {
+                                  "argumentTypes": [
+                                    {
+                                      "typeIdentifier": "t_string_memory_ptr",
+                                      "typeString": "string memory"
+                                    }
+                                  ],
+                                  "id": 1687,
+                                  "name": "formatUrl",
+                                  "nodeType": "Identifier",
+                                  "overloadedDeclarations": [],
+                                  "referencedDeclaration": 1809,
+                                  "src": "1592:9:7",
+                                  "typeDescriptions": {
+                                    "typeIdentifier": "t_function_internal_pure$_t_string_memory_ptr_$returns$_t_string_memory_ptr_$",
+                                    "typeString": "function (string memory) pure returns (string memory)"
+                                  }
+                                },
+                                "id": 1689,
+                                "isConstant": false,
+                                "isLValue": false,
+                                "isPure": false,
+                                "kind": "functionCall",
+                                "lValueRequested": false,
+                                "names": [],
+                                "nodeType": "FunctionCall",
+                                "src": "1592:17:7",
                                 "typeDescriptions": {
                                   "typeIdentifier": "t_string_memory_ptr",
                                   "typeString": "string memory"
@@ -8288,18 +4974,18 @@
                               ],
                               "expression": {
                                 "argumentTypes": null,
-                                "id": 1704,
+                                "id": 1684,
                                 "name": "abi",
                                 "nodeType": "Identifier",
                                 "overloadedDeclarations": [],
-                                "referencedDeclaration": 4162,
-                                "src": "1752:3:7",
+                                "referencedDeclaration": 4366,
+                                "src": "1565:3:7",
                                 "typeDescriptions": {
                                   "typeIdentifier": "t_magic_abi",
                                   "typeString": "abi"
                                 }
                               },
-                              "id": 1705,
+                              "id": 1685,
                               "isConstant": false,
                               "isLValue": false,
                               "isPure": true,
@@ -8307,13 +4993,13 @@
                               "memberName": "encodePacked",
                               "nodeType": "MemberAccess",
                               "referencedDeclaration": null,
-                              "src": "1752:16:7",
+                              "src": "1565:16:7",
                               "typeDescriptions": {
                                 "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$",
                                 "typeString": "function () pure returns (bytes memory)"
                               }
                             },
-                            "id": 1708,
+                            "id": 1690,
                             "isConstant": false,
                             "isLValue": false,
                             "isPure": false,
@@ -8321,7 +5007,7 @@
                             "lValueRequested": false,
                             "names": [],
                             "nodeType": "FunctionCall",
-                            "src": "1752:33:7",
+                            "src": "1565:45:7",
                             "typeDescriptions": {
                               "typeIdentifier": "t_bytes_memory_ptr",
                               "typeString": "bytes memory"
@@ -8335,20 +5021,20 @@
                               "typeString": "bytes memory"
                             }
                           ],
-                          "id": 1703,
+                          "id": 1683,
                           "isConstant": false,
                           "isLValue": false,
                           "isPure": true,
                           "lValueRequested": false,
                           "nodeType": "ElementaryTypeNameExpression",
-                          "src": "1745:6:7",
+                          "src": "1558:6:7",
                           "typeDescriptions": {
                             "typeIdentifier": "t_type$_t_string_storage_ptr_$",
                             "typeString": "type(string storage pointer)"
                           },
                           "typeName": "string"
                         },
-                        "id": 1709,
+                        "id": 1691,
                         "isConstant": false,
                         "isLValue": false,
                         "isPure": false,
@@ -8356,7 +5042,7 @@
                         "lValueRequested": false,
                         "names": [],
                         "nodeType": "FunctionCall",
-                        "src": "1745:41:7",
+                        "src": "1558:53:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_string_memory",
                           "typeString": "string memory"
@@ -8370,18 +5056,18 @@
                           "typeString": "string memory"
                         }
                       ],
-                      "id": 1702,
+                      "id": 1682,
                       "name": "WolframAlphaQuery",
                       "nodeType": "Identifier",
                       "overloadedDeclarations": [],
-                      "referencedDeclaration": 1600,
-                      "src": "1727:17:7",
+                      "referencedDeclaration": 1594,
+                      "src": "1540:17:7",
                       "typeDescriptions": {
                         "typeIdentifier": "t_function_event_nonpayable$_t_string_memory_ptr_$returns$__$",
                         "typeString": "function (string memory)"
                       }
                     },
-                    "id": 1710,
+                    "id": 1692,
                     "isConstant": false,
                     "isLValue": false,
                     "isPure": false,
@@ -8389,71 +5075,37 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "1727:60:7",
+                    "src": "1540:72:7",
                     "typeDescriptions": {
                       "typeIdentifier": "t_tuple$__$",
                       "typeString": "tuple()"
                     }
                   },
-                  "id": 1711,
+                  "id": 1693,
                   "nodeType": "EmitStatement",
-                  "src": "1722:65:7"
+                  "src": "1535:77:7"
                 }
               ]
             },
-            "documentation": "@dev Request the distance between two location in miles\r\n@param _from The location from, eg: London\r\n@param _to The location to, eg: Sydney\r",
-            "id": 1713,
+            "documentation": "@dev Request an answer to a query\r\n@param _query query to request answer for\r",
+            "id": 1695,
             "implemented": true,
             "isConstructor": false,
             "isDeclaredConst": false,
-            "modifiers": [
-              {
-                "arguments": [
-                  {
-                    "argumentTypes": null,
-                    "id": 1432,
-                    "name": "_requestId",
-                    "nodeType": "Identifier",
-                    "overloadedDeclarations": [],
-                    "referencedDeclaration": 1427,
-                    "src": "1933:10:6",
-                    "typeDescriptions": {
-                      "typeIdentifier": "t_bytes32",
-                      "typeString": "bytes32"
-                    }
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-                ],
-                "id": 1433,
-                "modifierName": {
-                  "argumentTypes": null,
-                  "id": 1431,
-                  "name": "recordChainlinkFulfillment",
-                  "nodeType": "Identifier",
-                  "overloadedDeclarations": [],
-                  "referencedDeclaration": 2580,
-                  "src": "1906:26:6",
-                  "typeDescriptions": {
-                    "typeIdentifier": "t_modifier$_t_bytes32_$",
-                    "typeString": "modifier (bytes32)"
-                  }
-                },
-                "nodeType": "ModifierInvocation",
-                "src": "1906:38:6"
-              }
-            ],
-            "name": "requestDistance",
+            "modifiers": [],
+            "name": "requestAnswer",
             "nodeType": "FunctionDefinition",
             "parameters": {
-              "id": 1635,
+              "id": 1629,
               "nodeType": "ParameterList",
               "parameters": [
                 {
                   "constant": false,
-                  "id": 1632,
-                  "name": "_from",
+                  "id": 1626,
+                  "name": "_query",
                   "nodeType": "VariableDeclaration",
-                  "scope": 1713,
-                  "src": "1226:12:7",
+                  "scope": 1695,
+                  "src": "1149:13:7",
                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
@@ -8461,10 +5113,10 @@
                     "typeString": "string"
                   },
                   "typeName": {
-                    "id": 1631,
+                    "id": 1625,
                     "name": "string",
                     "nodeType": "ElementaryTypeName",
-                    "src": "1226:6:7",
+                    "src": "1149:6:7",
                     "typeDescriptions": {
                       "typeIdentifier": "t_string_storage_ptr",
                       "typeString": "string"
@@ -8475,51 +5127,51 @@
                 },
                 {
                   "constant": false,
-                  "id": 1634,
-                  "name": "_to",
+                  "id": 1628,
+                  "name": "_index",
                   "nodeType": "VariableDeclaration",
-                  "scope": 1713,
-                  "src": "1240:10:7",
+                  "scope": 1695,
+                  "src": "1164:12:7",
                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
-                    "typeIdentifier": "t_string_memory_ptr",
-                    "typeString": "string"
+                    "typeIdentifier": "t_uint8",
+                    "typeString": "uint8"
                   },
                   "typeName": {
-                    "id": 1633,
-                    "name": "string",
+                    "id": 1627,
+                    "name": "uint8",
                     "nodeType": "ElementaryTypeName",
-                    "src": "1240:6:7",
+                    "src": "1164:5:7",
                     "typeDescriptions": {
-                      "typeIdentifier": "t_string_storage_ptr",
-                      "typeString": "string"
+                      "typeIdentifier": "t_uint8",
+                      "typeString": "uint8"
                     }
                   },
                   "value": null,
                   "visibility": "internal"
                 }
               ],
-              "src": "1225:26:7"
+              "src": "1148:29:7"
             },
             "payable": false,
             "returnParameters": {
-              "id": 1636,
+              "id": 1630,
               "nodeType": "ParameterList",
               "parameters": [],
-              "src": "1259:0:7"
+              "src": "1185:0:7"
             },
-            "scope": 1767,
-            "src": "1201:594:7",
+            "scope": 1810,
+            "src": "1126:494:7",
             "stateMutability": "nonpayable",
             "superFunction": null,
             "visibility": "public"
           },
           {
             "body": {
-              "id": 1733,
+              "id": 1715,
               "nodeType": "Block",
-              "src": "1988:97:7",
+              "src": "1813:97:7",
               "statements": [
                 {
                   "expression": {
@@ -8527,12 +5179,12 @@
                     "arguments": [
                       {
                         "argumentTypes": null,
-                        "id": 1727,
+                        "id": 1709,
                         "name": "_requestId",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1715,
-                        "src": "2022:10:7",
+                        "referencedDeclaration": 1697,
+                        "src": "1847:10:7",
                         "typeDescriptions": {
                           "typeIdentifier": "t_bytes32",
                           "typeString": "bytes32"
@@ -8540,41 +5192,320 @@
                       },
                       {
                         "argumentTypes": null,
-                        "id": 1728,
+                        "id": 1710,
                         "name": "_payment",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1717,
-                        "src": "2034:8:7",
+                        "referencedDeclaration": 1699,
+                        "src": "1859:8:7",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      },
+                      {
+                        "argumentTypes": null,
+                        "id": 1711,
+                        "name": "_callbackFunctionId",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 1701,
+                        "src": "1869:19:7",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_bytes4",
+                          "typeString": "bytes4"
+                        }
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+                        "typeDescriptions": {
+                          "typeIdentifier": "t_bytes32",
+                          "typeString": "bytes32"
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                       },
                       {
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+                          "name": "_requestId",
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+                          "src": "2086:10:7",
+                          "typeDescriptions": {
+                            "typeIdentifier": "t_bytes32",
+                            "typeString": "bytes32"
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+                        "nodeType": "IndexAccess",
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                         "typeDescriptions": {
-                          "typeIdentifier": "t_bytes4",
-                          "typeString": "bytes4"
+                          "typeIdentifier": "t_bytes32",
+                          "typeString": "bytes32"
                         }
                       },
                       {
                         "argumentTypes": null,
-                        "id": 1730,
-                        "name": "_expiration",
+                        "id": 1731,
+                        "name": "_answer",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
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-                        "src": "2065:11:7",
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                         "typeDescriptions": {
-                          "typeIdentifier": "t_uint256",
-                          "typeString": "uint256"
+                          "typeIdentifier": "t_int256",
+                          "typeString": "int256"
                         }
                       }
                     ],
@@ -8585,30 +5516,26 @@
                           "typeString": "bytes32"
                         },
                         {
-                          "typeIdentifier": "t_uint256",
-                          "typeString": "uint256"
-                        },
-                        {
-                          "typeIdentifier": "t_bytes4",
-                          "typeString": "bytes4"
+                          "typeIdentifier": "t_bytes32",
+                          "typeString": "bytes32"
                         },
                         {
-                          "typeIdentifier": "t_uint256",
-                          "typeString": "uint256"
+                          "typeIdentifier": "t_int256",
+                          "typeString": "int256"
                         }
                       ],
                       "id": 1726,
-                      "name": "cancelChainlinkRequest",
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                       "nodeType": "Identifier",
                       "overloadedDeclarations": [],
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-                      "src": "1999:22:7",
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-                        "typeString": "function (bytes32,uint256,bytes4,uint256)"
+                        "typeIdentifier": "t_function_event_nonpayable$_t_bytes32_$_t_bytes32_$_t_int256_$returns$__$",
+                        "typeString": "function (bytes32,bytes32,int256)"
                       }
                     },
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@@ -8616,123 +5543,246 @@
                     "lValueRequested": false,
                     "names": [],
                     "nodeType": "FunctionCall",
-                    "src": "1999:78:7",
+                    "src": "2048:59:7",
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+                        "name": "answers",
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+                        "referencedDeclaration": 1602,
+                        "src": "2118:7:7",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_mapping$_t_bytes32_$_t_int256_$",
+                          "typeString": "mapping(bytes32 => int256)"
+                        }
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+                        "baseExpression": {
+                          "argumentTypes": null,
+                          "id": 1735,
+                          "name": "requests",
+                          "nodeType": "Identifier",
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+                          "referencedDeclaration": 1598,
+                          "src": "2126:8:7",
+                          "typeDescriptions": {
+                            "typeIdentifier": "t_mapping$_t_bytes32_$_t_bytes32_$",
+                            "typeString": "mapping(bytes32 => bytes32)"
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+                          "id": 1736,
+                          "name": "_requestId",
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+                          "src": "2135:10:7",
+                          "typeDescriptions": {
+                            "typeIdentifier": "t_bytes32",
+                            "typeString": "bytes32"
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                 }
               ]
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+                  "referencedDeclaration": 2948,
+                  "src": "1988:26:7",
+                  "typeDescriptions": {
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+                    "typeString": "modifier (bytes32)"
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                 },
+                "nodeType": "ModifierInvocation",
+                "src": "1988:38:7"
+              }
+            ],
+            "name": "fulfill",
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                 {
                   "constant": false,
-                  "id": 1719,
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                   "nodeType": "VariableDeclaration",
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                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
-                    "typeIdentifier": "t_bytes4",
-                    "typeString": "bytes4"
+                    "typeIdentifier": "t_bytes32",
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-                    "id": 1718,
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-                    "src": "1892:6:7",
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                     "typeDescriptions": {
-                      "typeIdentifier": "t_bytes4",
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@@ -8740,150 +5790,235 @@
                 },
                 {
                   "constant": false,
-                  "id": 1721,
-                  "name": "_expiration",
+                  "id": 1720,
+                  "name": "_answer",
                   "nodeType": "VariableDeclaration",
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-                  "src": "1929:19:7",
+                  "scope": 1748,
+                  "src": "1955:14:7",
                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
-                    "typeIdentifier": "t_uint256",
-                    "typeString": "uint256"
+                    "typeIdentifier": "t_int256",
+                    "typeString": "int256"
                   },
                   "typeName": {
-                    "id": 1720,
-                    "name": "uint256",
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+                    "name": "int256",
                     "nodeType": "ElementaryTypeName",
-                    "src": "1929:7:7",
+                    "src": "1955:6:7",
                     "typeDescriptions": {
-                      "typeIdentifier": "t_uint256",
-                      "typeString": "uint256"
+                      "typeIdentifier": "t_int256",
+                      "typeString": "int256"
                     }
                   },
                   "value": null,
                   "visibility": "internal"
                 }
               ],
-              "src": "1825:130:7"
+              "src": "1934:36:7"
             },
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             "returnParameters": {
               "id": 1725,
               "nodeType": "ParameterList",
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-              "src": "1988:0:7"
+              "src": "2032:0:7"
             },
-            "scope": 1767,
-            "src": "1803:282:7",
+            "scope": 1810,
+            "src": "1918:285:7",
             "stateMutability": "nonpayable",
             "superFunction": null,
             "visibility": "public"
           },
           {
             "body": {
-              "id": 1765,
+              "id": 1808,
               "nodeType": "Block",
-              "src": "2209:177:7",
+              "src": "2272:339:7",
               "statements": [
                 {
-                  "eventCall": {
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+                      "name": "urlBytes",
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+                      "src": "2281:21:7",
+                      "stateVariable": false,
+                      "storageLocation": "memory",
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+                        "typeIdentifier": "t_bytes_memory_ptr",
+                        "typeString": "bytes"
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+                        "id": 1755,
+                        "name": "bytes",
+                        "nodeType": "ElementaryTypeName",
+                        "src": "2281:5:7",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_bytes_storage_ptr",
+                          "typeString": "bytes"
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-                          "typeString": "bytes32"
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                         }
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-                        "typeString": "function (bytes32,bytes32,int256)"
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@@ -8891,299 +6026,596 @@
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                     "nodeType": "FunctionCall",
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+                    "id": 1779,
+                    "nodeType": "ExpressionStatement",
+                    "src": "2422:3:7"
                   },
-                  "id": 1759,
-                  "nodeType": "ExpressionStatement",
-                  "src": "2297:43:7"
+                  "nodeType": "ForStatement",
+                  "src": "2385:186:7"
                 },
                 {
                   "expression": {
                     "argumentTypes": null,
-                    "id": 1763,
-                    "isConstant": false,
-                    "isLValue": false,
-                    "isPure": false,
-                    "lValueRequested": false,
-                    "nodeType": "UnaryOperation",
-                    "operator": "delete",
-                    "prefix": true,
-                    "src": "2351:27:7",
-                    "subExpression": {
-                      "argumentTypes": null,
-                      "baseExpression": {
+                    "arguments": [
+                      {
                         "argumentTypes": null,
-                        "id": 1760,
-                        "name": "requests",
+                        "id": 1805,
+                        "name": "formatted",
                         "nodeType": "Identifier",
                         "overloadedDeclarations": [],
-                        "referencedDeclaration": 1604,
-                        "src": "2358:8:7",
+                        "referencedDeclaration": 1762,
+                        "src": "2593:9:7",
                         "typeDescriptions": {
-                          "typeIdentifier": "t_mapping$_t_bytes32_$_t_bytes32_$",
-                          "typeString": "mapping(bytes32 => bytes32)"
+                          "typeIdentifier": "t_bytes_memory_ptr",
+                          "typeString": "bytes memory"
                         }
-                      },
-                      "id": 1762,
-                      "indexExpression": {
-                        "argumentTypes": null,
-                        "id": 1761,
-                        "name": "_requestId",
-                        "nodeType": "Identifier",
-                        "overloadedDeclarations": [],
-                        "referencedDeclaration": 1736,
-                        "src": "2367:10:7",
-                        "typeDescriptions": {
-                          "typeIdentifier": "t_bytes32",
-                          "typeString": "bytes32"
+                      }
+                    ],
+                    "expression": {
+                      "argumentTypes": [
+                        {
+                          "typeIdentifier": "t_bytes_memory_ptr",
+                          "typeString": "bytes memory"
                         }
-                      },
+                      ],
+                      "id": 1804,
                       "isConstant": false,
-                      "isLValue": true,
-                      "isPure": false,
-                      "lValueRequested": true,
-                      "nodeType": "IndexAccess",
-                      "src": "2358:20:7",
+                      "isLValue": false,
+                      "isPure": true,
+                      "lValueRequested": false,
+                      "nodeType": "ElementaryTypeNameExpression",
+                      "src": "2586:6:7",
                       "typeDescriptions": {
-                        "typeIdentifier": "t_bytes32",
-                        "typeString": "bytes32"
-                      }
+                        "typeIdentifier": "t_type$_t_string_storage_ptr_$",
+                        "typeString": "type(string storage pointer)"
+                      },
+                      "typeName": "string"
                     },
+                    "id": 1806,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
+                    "kind": "typeConversion",
+                    "lValueRequested": false,
+                    "names": [],
+                    "nodeType": "FunctionCall",
+                    "src": "2586:17:7",
                     "typeDescriptions": {
-                      "typeIdentifier": "t_tuple$__$",
-                      "typeString": "tuple()"
+                      "typeIdentifier": "t_string_memory",
+                      "typeString": "string memory"
                     }
                   },
-                  "id": 1764,
-                  "nodeType": "ExpressionStatement",
-                  "src": "2351:27:7"
+                  "functionReturnParameters": 1754,
+                  "id": 1807,
+                  "nodeType": "Return",
+                  "src": "2579:24:7"
                 }
               ]
             },
             "documentation": null,
-            "id": 1766,
+            "id": 1809,
             "implemented": true,
             "isConstructor": false,
-            "isDeclaredConst": false,
-            "modifiers": [
-              {
-                "arguments": [
-                  {
-                    "argumentTypes": null,
-                    "id": 1741,
-                    "name": "_requestId",
-                    "nodeType": "Identifier",
-                    "overloadedDeclarations": [],
-                    "referencedDeclaration": 1736,
-                    "src": "2192:10:7",
-                    "typeDescriptions": {
-                      "typeIdentifier": "t_bytes32",
-                      "typeString": "bytes32"
-                    }
-                  }
-                ],
-                "id": 1742,
-                "modifierName": {
-                  "argumentTypes": null,
-                  "id": 1740,
-                  "name": "recordChainlinkFulfillment",
-                  "nodeType": "Identifier",
-                  "overloadedDeclarations": [],
-                  "referencedDeclaration": 2889,
-                  "src": "2165:26:7",
-                  "typeDescriptions": {
-                    "typeIdentifier": "t_modifier$_t_bytes32_$",
-                    "typeString": "modifier (bytes32)"
-                  }
-                },
-                "nodeType": "ModifierInvocation",
-                "src": "2165:38:7"
-              }
-            ],
-            "name": "fulfill",
+            "isDeclaredConst": true,
+            "modifiers": [],
+            "name": "formatUrl",
             "nodeType": "FunctionDefinition",
             "parameters": {
-              "id": 1739,
+              "id": 1751,
               "nodeType": "ParameterList",
               "parameters": [
                 {
                   "constant": false,
-                  "id": 1736,
-                  "name": "_requestId",
+                  "id": 1750,
+                  "name": "_url",
                   "nodeType": "VariableDeclaration",
-                  "scope": 1766,
-                  "src": "2110:18:7",
+                  "scope": 1809,
+                  "src": "2230:11:7",
                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
-                    "typeIdentifier": "t_bytes32",
-                    "typeString": "bytes32"
+                    "typeIdentifier": "t_string_memory_ptr",
+                    "typeString": "string"
                   },
                   "typeName": {
-                    "id": 1735,
-                    "name": "bytes32",
+                    "id": 1749,
+                    "name": "string",
                     "nodeType": "ElementaryTypeName",
-                    "src": "2110:7:7",
+                    "src": "2230:6:7",
                     "typeDescriptions": {
-                      "typeIdentifier": "t_bytes32",
-                      "typeString": "bytes32"
+                      "typeIdentifier": "t_string_storage_ptr",
+                      "typeString": "string"
                     }
                   },
                   "value": null,
                   "visibility": "internal"
-                },
+                }
+              ],
+              "src": "2229:13:7"
+            },
+            "payable": false,
+            "returnParameters": {
+              "id": 1754,
+              "nodeType": "ParameterList",
+              "parameters": [
                 {
                   "constant": false,
-                  "id": 1738,
-                  "name": "_distance",
+                  "id": 1753,
+                  "name": "",
                   "nodeType": "VariableDeclaration",
-                  "scope": 1766,
-                  "src": "2130:16:7",
+                  "scope": 1809,
+                  "src": "2265:6:7",
                   "stateVariable": false,
                   "storageLocation": "default",
                   "typeDescriptions": {
-                    "typeIdentifier": "t_int256",
-                    "typeString": "int256"
+                    "typeIdentifier": "t_string_memory_ptr",
+                    "typeString": "string"
                   },
                   "typeName": {
-                    "id": 1737,
-                    "name": "int256",
+                    "id": 1752,
+                    "name": "string",
                     "nodeType": "ElementaryTypeName",
-                    "src": "2130:6:7",
+                    "src": "2265:6:7",
                     "typeDescriptions": {
-                      "typeIdentifier": "t_int256",
-                      "typeString": "int256"
+                      "typeIdentifier": "t_string_storage_ptr",
+                      "typeString": "string"
                     }
                   },
                   "value": null,
                   "visibility": "internal"
                 }
               ],
-              "src": "2109:38:7"
+              "src": "2264:8:7"
             },
-            "payable": false,
-            "returnParameters": {
-              "id": 1743,
-              "nodeType": "ParameterList",
-              "parameters": [],
-              "src": "2209:0:7"
-            },
-            "scope": 1767,
-            "src": "2093:293:7",
-            "stateMutability": "nonpayable",
+            "scope": 1810,
+            "src": "2211:400:7",
+            "stateMutability": "pure",
             "superFunction": null,
-            "visibility": "public"
+            "visibility": "private"
           }
         ],
-        "scope": 1768,
-        "src": "265:2126:7"
+        "scope": 1811,
+        "src": "265:2351:7"
       }
     ],
-    "src": "0:2393:7"
+    "src": "0:2618:7"
   },
   "compiler": {
     "name": "solc",
@@ -9191,30 +6623,130 @@
   },
   "networks": {
     "3": {
-      "events": {},
+      "events": {
+        "0x00d315d2ede2869d559e8244630c7ef9f0ff14101c60f81a98e7b2ec87779ad8": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "requestId",
+              "type": "bytes32"
+            },
+            {
+              "indexed": true,
+              "name": "hash",
+              "type": "bytes32"
+            },
+            {
+              "indexed": false,
+              "name": "answer",
+              "type": "int256"
+            }
+          ],
+          "name": "RequestFulfilled",
+          "type": "event"
+        },
+        "0xa25d4e41d174abb21b44b33201a3916475ff89d55ed6b9affb8b1dff5ccb0a2e": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "url",
+              "type": "string"
+            }
+          ],
+          "name": "WolframAlphaQuery",
+          "type": "event"
+        },
+        "0xf8df31144d9c2f0f6b59d69b8b98abd5459d07f2742c4df920b25aae33c64820": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "previousOwner",
+              "type": "address"
+            }
+          ],
+          "name": "OwnershipRenounced",
+          "type": "event"
+        },
+        "0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "previousOwner",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "name": "newOwner",
+              "type": "address"
+            }
+          ],
+          "name": "OwnershipTransferred",
+          "type": "event"
+        },
+        "0xb5e6e01e79f91267dc17b4e6314d5d4d03593d2ceee0fbb452b750bd70ea5af9": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "id",
+              "type": "bytes32"
+            }
+          ],
+          "name": "ChainlinkRequested",
+          "type": "event"
+        },
+        "0x7cc135e0cebb02c3480ae5d74d377283180a2601f8f644edf7987b009316c63a": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "id",
+              "type": "bytes32"
+            }
+          ],
+          "name": "ChainlinkFulfilled",
+          "type": "event"
+        },
+        "0xe1fe3afa0f7f761ff0a8b89086790efd5140d2907ebd5b7ff6bfcb5e075fd4c5": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "id",
+              "type": "bytes32"
+            }
+          ],
+          "name": "ChainlinkCancelled",
+          "type": "event"
+        }
+      },
       "links": {},
-      "address": "0x4cD0F95CDB7213Cdb8A2DF1c4e9D74296Ec94781",
-      "transactionHash": "0xe87b5988aad5ae3671602f284034e96a346b1da1dae1384904cb5e76ecca16c7"
+      "address": "0x8Cf1E3706ECA807Ed55074eFb6D3b75bDc4B6565",
+      "transactionHash": "0x26fb6eb433a8bad76bd771552107e1e47456df2f79b4979ca4802c0ae7fc6478"
     }
   },
-  "schemaVersion": "3.0.8",
-  "updatedAt": "2020-03-04T12:21:04.184Z",
+  "schemaVersion": "3.2.0",
+  "updatedAt": "2020-12-16T18:24:40.459Z",
+  "networkType": "ethereum",
   "devdoc": {
     "methods": {
       "renounceOwnership()": {
         "details": "Allows the current owner to relinquish control of the contract."
       },
-      "transferOwnership(address)": {
-        "details": "Allows the current owner to transfer control of the contract to a newOwner.",
+      "requestAnswer(string,uint8)": {
+        "details": "Request an answer to a query\r",
         "params": {
-          "_newOwner": "The address to transfer ownership to."
+          "_query": "query to request answer for\r"
         }
       },
-      "requestDistance(string,string)": {
-        "details": "Request the distance between two location in miles\r",
+      "transferOwnership(address)": {
+        "details": "Allows the current owner to transfer control of the contract to a newOwner.",
         "params": {
-          "_from": "The location from, eg: London\r",
-          "_to": "The location to, eg: Sydney\r"
+          "_newOwner": "The address to transfer ownership to."
         }
       }
     }
diff --git a/contracts/WolframAlphaConsumer.sol b/contracts/WolframAlphaConsumer.sol
index 438f9fa..164c8cb 100644
--- a/contracts/WolframAlphaConsumer.sol
+++ b/contracts/WolframAlphaConsumer.sol
@@ -9,14 +9,14 @@ import "chainlink/contracts/Chainlinked.sol";
 contract WolframAlphaConsumer is Chainlinked, Ownable {
     // solium-disable-next-line zeppelin/no-arithmetic-operations
     uint256 constant private ORACLE_PAYMENT = 1 * LINK;
-    string constant public BASE_URL = "http://api.wolframalpha.com/v1/result?i=";
+    string constant public BASE_URL = "https://www.wolframalpha.com/input/?i=";
 
     bytes32 public jobId;
 
     event RequestFulfilled(
         bytes32 indexed requestId,
         bytes32 indexed hash,
-        int256 distance
+        int256 answer
     );
 
     event WolframAlphaQuery(
@@ -24,7 +24,7 @@ contract WolframAlphaConsumer is Chainlinked, Ownable {
     );
 
     mapping(bytes32 => bytes32) requests;
-    mapping(bytes32 => int256) public distances;
+    mapping(bytes32 => int256) public answers;
 
     constructor(address _token, address _oracle, bytes32 _jobId) public {
         setLinkToken(_token);
@@ -33,20 +33,18 @@ contract WolframAlphaConsumer is Chainlinked, Ownable {
     }
 
     /**
-        @dev Request the distance between two location in miles
-        @param _from The location from, eg: London
-        @param _to The location to, eg: Sydney
+        @dev Request an answer to a query
+        @param _query query to request answer for
     */
-    function requestDistance(string _from, string _to) public {
-        string memory query = string(abi.encodePacked("What's the distance between ", _from, " and ", _to, "?"));
+    function requestAnswer(string _query, uint8 _index) public {
         Chainlink.Request memory req = newRequest(jobId, this, this.fulfill.selector);
-        req.add("query", query);
-        req.addInt("index", 1);
+        req.add("query", _query);
+        req.addInt("index", _index);
         req.add("copyPath", "result");
         bytes32 requestId = chainlinkRequest(req, ORACLE_PAYMENT);
-        requests[requestId] = keccak256(abi.encodePacked(_from, _to));
+        requests[requestId] = keccak256(abi.encodePacked(_query));
 
-        emit WolframAlphaQuery(string(abi.encodePacked(BASE_URL, query)));
+        emit WolframAlphaQuery(string(abi.encodePacked(BASE_URL, formatUrl(_query))));
     }
 
     function cancelRequest(
@@ -61,13 +59,26 @@ contract WolframAlphaConsumer is Chainlinked, Ownable {
         cancelChainlinkRequest(_requestId, _payment, _callbackFunctionId, _expiration);
     }
 
-    function fulfill(bytes32 _requestId, int256 _distance)
+    function fulfill(bytes32 _requestId, int256 _answer)
     public
     recordChainlinkFulfillment(_requestId)
     {
-        emit RequestFulfilled(_requestId, requests[_requestId], _distance);
-        distances[requests[_requestId]] = _distance;
+        emit RequestFulfilled(_requestId, requests[_requestId], _answer);
+        answers[requests[_requestId]] = _answer;
         delete requests[_requestId];
     }
 
+    function formatUrl(string _url) private pure returns (string){
+      bytes memory urlBytes = bytes(_url);
+      bytes memory formatted = new bytes(urlBytes.length);
+      for(uint i = 0; i < urlBytes.length; i++) {
+        if (urlBytes[i] == " ") {
+          formatted[i] = "+";
+        } else {
+          formatted[i] = urlBytes[i];
+        }
+      }
+      return string(formatted);
+    }
+
 }
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..7561261
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,10166 @@
+{
+  "name": "example-chainlinks",
+  "version": "0.0.1",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
+      "integrity": "sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0jhss4cPP93EW7s+uC5bikET2twEF3KV+7rDblJcmNvTR7VJejqd2C2g==",
+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.8.3"
+      }
+    },
+    "@babel/helper-module-imports": {
+      "version": "7.12.5",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-imports/-/helper-module-imports-7.12.5.tgz",
+      "integrity": "sha512-SR713Ogqg6++uexFRORf/+nPXMmWIn80TALu0uaFb+iQIUoR7bOC7zBWyzBs5b3tBBJXuyD0cRu1F15GyzjOWA==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.12.5"
+      }
+    },
+    "@babel/helper-plugin-utils": {
+      "version": "7.10.4",
+      "resolved": "https://registry.npmjs.org/@babel/helper-plugin-utils/-/helper-plugin-utils-7.10.4.tgz",
+      "integrity": "sha512-O4KCvQA6lLiMU9l2eawBPMf1xPP8xPfB3iEQw150hOVTqj/rfXz0ThTb4HEzqQfs2Bmo5Ay8BzxfzVtBrr9dVg==",
+      "dev": true
+    },
+    "@babel/helper-validator-identifier": {
+      "version": "7.10.4",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.10.4.tgz",
+      "integrity": "sha512-3U9y+43hz7ZM+rzG24Qe2mufW5KhvFg/NhnNph+i9mgCtdTCtMJuI1TMkrIUiK7Ix4PYlRF9I5dhqaLYA/ADXw==",
+      "dev": true
+    },
+    "@babel/highlight": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.8.3.tgz",
+      "integrity": "sha512-PX4y5xQUvy0fnEVHrYOarRPXVWafSjTW9T0Hab8gVIawpl2Sj0ORyrygANq+KjcNlSSTw0YCLSNA8OyZ1I4yEg==",
+      "dev": true,
+      "requires": {
+        "chalk": "^2.0.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^4.0.0"
+      }
+    },
+    "@babel/plugin-transform-runtime": {
+      "version": "7.12.10",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-runtime/-/plugin-transform-runtime-7.12.10.tgz",
+      "integrity": "sha512-xOrUfzPxw7+WDm9igMgQCbO3cJKymX7dFdsgRr1eu9n3KjjyU4pptIXbXPseQDquw+W+RuJEJMHKHNsPNNm3CA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-module-imports": "^7.12.5",
+        "@babel/helper-plugin-utils": "^7.10.4",
+        "semver": "^5.5.1"
+      }
+    },
+    "@babel/runtime": {
+      "version": "7.12.5",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.12.5.tgz",
+      "integrity": "sha512-plcc+hbExy3McchJCEQG3knOsuh3HH+Prx1P6cLIkET/0dLuQDEnrT+s27Axgc9bqfsmNUNHfscgMUdBpC9xfg==",
+      "dev": true,
+      "requires": {
+        "regenerator-runtime": "^0.13.4"
+      }
+    },
+    "@babel/types": {
+      "version": "7.12.10",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.12.10.tgz",
+      "integrity": "sha512-sf6wboJV5mGyip2hIpDSKsr80RszPinEFjsHTalMxZAZkoQ2/2yQzxlcFN52SJqsyPfLtPmenL4g2KB3KJXPDw==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-validator-identifier": "^7.10.4",
+        "lodash": "^4.17.19",
+        "to-fast-properties": "^2.0.0"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.20",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.20.tgz",
+          "integrity": "sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==",
+          "dev": true
+        }
+      }
+    },
+    "@ensdomains/buffer": {
+      "version": "0.0.10",
+      "resolved": "https://registry.npmjs.org/@ensdomains/buffer/-/buffer-0.0.10.tgz",
+      "integrity": "sha512-EOFqiWnN36EyyBAgHFTsabFcFICUALt41SiDm/4pAw4V36R4lD4wHcnZcqCYki9m1fMaeWGHrdqxmrMa8iiSTQ=="
+    },
+    "@ensdomains/ens": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/@ensdomains/ens/-/ens-0.1.2.tgz",
+      "integrity": "sha512-OGcQOtObD8NGt5tJJ3VsB+P95z/FnxxvfMgSU3h2fADRXLtPCfeXBtjLOejewHKltMF+JRA5ns57yoTfYjodSQ==",
+      "requires": {
+        "eth-ens-namehash": "^1.0.2",
+        "ethereumjs-testrpc": "^6.0.3",
+        "ganache-cli": "^6.1.0",
+        "solc": "^0.4.20",
+        "testrpc": "0.0.1",
+        "web3-utils": "^1.0.0-beta.31"
+      }
+    },
+    "@sindresorhus/is": {
+      "version": "0.14.0",
+      "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-0.14.0.tgz",
+      "integrity": "sha512-9NET910DNaIPngYnLLPeg+Ogzqsi9uM4mSboU5y6p8S5DzMTVEsJZrawi+BoDNUVBa2DhJqQYUFvMDfgU062LQ==",
+      "dev": true
+    },
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+      "integrity": "sha1-8m9ITXJoTPQr7ft2lwqhYI+/lXc=",
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+      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI="
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+        "set-blocking": "^2.0.0",
+        "string-width": "^2.0.0",
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+        "y18n": "^3.2.1",
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+          "integrity": "sha1-EgYBU3qRbSmUD5NNo7SNWFo5IT0=",
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+            "strip-ansi": "^3.0.1",
+            "wrap-ansi": "^2.0.0"
+          },
+          "dependencies": {
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+              "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
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+              }
+            }
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+      }
+    },
+    "yargs-parser": {
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+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-7.0.0.tgz",
+      "integrity": "sha1-jQrELxbqVd69MyyvTEA4s+P139k=",
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+      }
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+        "decamelize": "^1.2.0",
+        "flat": "^4.1.0",
+        "is-plain-obj": "^1.1.0",
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+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
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+        },
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+          "resolved": "https://registry.npmjs.org/cliui/-/cliui-5.0.0.tgz",
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+            "strip-ansi": "^5.2.0",
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+        "find-up": {
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+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-3.0.0.tgz",
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+          "dev": true,
+          "requires": {
+            "locate-path": "^3.0.0"
+          }
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+        "get-caller-file": {
+          "version": "2.0.5",
+          "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
+          "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==",
+          "dev": true
+        },
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+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "locate-path": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",
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+          "dev": true,
+          "requires": {
+            "p-locate": "^3.0.0",
+            "path-exists": "^3.0.0"
+          }
+        },
+        "p-limit": {
+          "version": "2.3.0",
+          "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.3.0.tgz",
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+          "dev": true,
+          "requires": {
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+          }
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+        "p-locate": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-3.0.0.tgz",
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+          "dev": true,
+          "requires": {
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+        "require-main-filename": {
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+          "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-2.0.0.tgz",
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+        },
+        "strip-ansi": {
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+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
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+          "dev": true
+        },
+        "yargs": {
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+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-14.2.3.tgz",
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+          "dev": true,
+          "requires": {
+            "cliui": "^5.0.0",
+            "decamelize": "^1.2.0",
+            "find-up": "^3.0.0",
+            "get-caller-file": "^2.0.1",
+            "require-directory": "^2.1.1",
+            "require-main-filename": "^2.0.0",
+            "set-blocking": "^2.0.0",
+            "string-width": "^3.0.0",
+            "which-module": "^2.0.0",
+            "y18n": "^4.0.0",
+            "yargs-parser": "^15.0.1"
+          }
+        },
+        "yargs-parser": {
+          "version": "15.0.1",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-15.0.1.tgz",
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+          "dev": true,
+          "requires": {
+            "camelcase": "^5.0.0",
+            "decamelize": "^1.2.0"
+          }
+        }
+      }
+    },
+    "yauzl": {
+      "version": "2.10.0",
+      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
+      "integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
+      "dev": true,
+      "requires": {
+        "buffer-crc32": "~0.2.3",
+        "fd-slicer": "~1.1.0"
+      }
+    },
+    "yocto-queue": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
+      "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==",
+      "dev": true
+    }
+  }
+}
diff --git a/package.json b/package.json
index 93ac154..393259e 100644
--- a/package.json
+++ b/package.json
@@ -18,6 +18,7 @@
     "openzeppelin-solidity": "^1.12.0"
   },
   "devDependencies": {
+    "@truffle/hdwallet-provider": "^1.2.0",
     "bn.js": "^4.11.8",
     "eslint": "^5.14.1",
     "eslint-config-standard": "^12.0.0",
@@ -29,8 +30,7 @@
     "ethereumjs-util": "^6.1.0",
     "solium": "^1.2.3",
     "solium-plugin-zeppelin": "^0.0.2",
-    "truffle": "^5.0.4",
-    "truffle-hdwallet-provider": "^1.0.0-web3one.5",
-    "web3": "^1.0.0-beta.46"
+    "truffle": "^5.1.57",
+    "web3": "^1.2.0"
   }
 }
diff --git a/scripts/wolfram/get.js b/scripts/wolfram/get.js
index f529463..babe012 100644
--- a/scripts/wolfram/get.js
+++ b/scripts/wolfram/get.js
@@ -1,15 +1,15 @@
-const WolframAlphaConsumer = artifacts.require("WolframAlphaConsumer");
-
-module.exports = async(callback) => {
-    try {
-        let ph = web3.utils.soliditySha3(process.argv[4], process.argv[5]);
-        let wa = await WolframAlphaConsumer.deployed();
-        let distance = await wa.distances.call(ph);
-        console.log("Pair hash:", ph);
-        console.log("Distance between", process.argv[4], "and", process.argv[5], "is", distance.toNumber(), "miles");
-    } catch (e) {
-        console.error(e)
-    }
-
-    return callback()
-};
\ No newline at end of file
+const WolframAlphaConsumer = artifacts.require("WolframAlphaConsumer");
+
+module.exports = async (callback) => {
+  try {
+    let qh = web3.utils.soliditySha3(process.argv[4]);
+    let wa = await WolframAlphaConsumer.deployed();
+    let answer = await wa.answers(qh);
+    console.log("Query hash:", qh);
+    console.log(process.argv[4], " => ", answer.toNumber());
+  } catch (e) {
+    console.error(e);
+  }
+
+  return callback();
+};
diff --git a/scripts/wolfram/request.js b/scripts/wolfram/request.js
index 6308320..2c95681 100644
--- a/scripts/wolfram/request.js
+++ b/scripts/wolfram/request.js
@@ -1,24 +1,24 @@
-const helper = require("../helper.js");
-
-const WolframAlphaConsumer = artifacts.require("WolframAlphaConsumer");
-const LinkToken = artifacts.require("LinkTokenInterface");
-
-module.exports = async(callback) => {
-    let from = process.argv[4];
-    let to = process.argv[5];
-
-    try {
-        let network = await web3.eth.net.getNetworkType();
-        let linkToken = await LinkToken.at(helper.getLinkToken(network));
-        let wa = await WolframAlphaConsumer.deployed();
-        console.log("Sending 1 LINK to the consumer contract...");
-        await linkToken.transfer(wa.address, web3.utils.toWei("1"));
-        console.log("Requesting distance from WolframAlpha Short Answers...");
-        await wa.requestDistance(from, to);
-        console.log("Done");
-    } catch (e) {
-        console.error(e);
-    }
-
-    return callback();
-};
+const helper = require("../helper.js");
+
+const WolframAlphaConsumer = artifacts.require("WolframAlphaConsumer");
+const LinkToken = artifacts.require("LinkTokenInterface");
+
+module.exports = async (callback) => {
+  let query = process.argv[4];
+  let index = process.argv[5];
+
+  try {
+    let network = await web3.eth.net.getNetworkType();
+    let linkToken = await LinkToken.at(helper.getLinkToken(network));
+    let wa = await WolframAlphaConsumer.deployed();
+    console.log("Sending 1 LINK to the consumer contract...");
+    await linkToken.transfer(wa.address, web3.utils.toWei("1"));
+    console.log("Requesting answer from WolframAlpha Short Answers...");
+    await wa.requestAnswer(query, index);
+    console.log("Done");
+  } catch (e) {
+    console.error(e);
+  }
+
+  return callback();
+};
diff --git a/truffle.js b/truffle.js
index c1d4504..1f05e0e 100644
--- a/truffle.js
+++ b/truffle.js
@@ -1,20 +1,21 @@
-const HDWalletProvider = require("truffle-hdwallet-provider");
+const HDWalletProvider = require("@truffle/hdwallet-provider");
 
 module.exports = {
   compilers: {
     solc: {
-      version: "0.4.24"
-    }
+      version: "0.4.24",
+    },
   },
   networks: {
     ropsten: {
-      provider: function() {
-        return new HDWalletProvider(
-            "", // Mnemonic
-            "", // Ethereum client, Infura etc.
-            0,
-            2
-        );
+      provider: function () {
+        return new HDWalletProvider({
+          privateKeys: [
+            "0b82eddeac6c08a25e64e494cc3fabfb29fc7861d5dff71c453874d482a50c82",
+          ], // Mnemonic
+          providerOrUrl:
+            "https://ropsten.infura.io/v3/8bc24cb75f3c47eba9bb028b64085bd4", // Ethereum client, Infura etc.
+        });
       },
       network_id: 3,
       gas: 4712388,
@@ -46,7 +47,7 @@ module.exports = {
       httpGet: {
         id: "c179a8180e034cf5a341488406c32827",
         oracle: "0x83F00b902cbf06E316C95F51cbEeD9D2572a349a",
-      }
+      },
     },
     development: {
       host: "localhost",
@@ -58,15 +59,15 @@ module.exports = {
       linkToken: "",
       assetPriceJob: {
         id: "",
-        oracle: ""
+        oracle: "",
       },
       alphaVantageJob: {
         id: "",
-        oracle: ""
+        oracle: "",
       },
       apiAggregatorJob: {
         id: "",
-        oracle: ""
+        oracle: "",
       },
       wolframAlphaJob: {
         id: "",
@@ -79,13 +80,13 @@ module.exports = {
       httpGet: {
         id: "",
         oracle: "",
-      }
-    }
+      },
+    },
   },
   solc: {
     optimizer: {
       enabled: true,
-      runs: 200
-    }
-  }
+      runs: 200,
+    },
+  },
 };