first version of stub server

.dockerignore

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+node_modules

.env

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+PUBLIC_KEY=0x1df62f291b2e969fb0849d99d9ce41e2f137006e
+PRIVATE_KEY=0xb0057716d5917badaf911b193b12b910811c1497b5bada8d7711f758981c3773
+ORACLE_ADDRESS=0xcfeb869f69431e42cdb54a4f4f105c19c080a601

.eslintrc.json

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+{
+    "extends": "airbnb-base"
+}

.gitignore

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+# Created by .ignore support plugin (hsz.mobi)
+node_modules

Dockerfile

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+FROM node:carbon
+
+# Create app directory
+WORKDIR /usr/src/app
+
+# Install app dependencies
+# A wildcard is used to ensure both package.json AND package-lock.json are copied
+# where available (npm@5+)
+COPY package*.json ./
+
+RUN npm install
+
+# Bundle app source
+COPY . .
+
+CMD [ "npm", "start" ]

config/default.json

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+{
+  "contracts": {
+    "oracle": {
+      "abi": [
+        {
+          "constant": true,
+          "inputs": [],
+          "name": "trustedServer",
+          "outputs": [
+            {
+              "name": "",
+              "type": "address"
+            }
+          ],
+          "payable": false,
+          "stateMutability": "view",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "name": "_trustedServer",
+              "type": "address"
+            }
+          ],
+          "payable": false,
+          "stateMutability": "nonpayable",
+          "type": "constructor"
+        },
+        {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "id",
+              "type": "bytes32"
+            },
+            {
+              "indexed": false,
+              "name": "url",
+              "type": "string"
+            }
+          ],
+          "name": "DataRequested",
+          "type": "event"
+        },
+        {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "id",
+              "type": "bytes32"
+            },
+            {
+              "indexed": false,
+              "name": "value",
+              "type": "string"
+            }
+          ],
+          "name": "RequestFulfilled",
+          "type": "event"
+        },
+        {
+          "constant": false,
+          "inputs": [
+            {
+              "name": "_url",
+              "type": "string"
+            }
+          ],
+          "name": "request",
+          "outputs": [
+            {
+              "name": "id",
+              "type": "bytes32"
+            }
+          ],
+          "payable": false,
+          "stateMutability": "nonpayable",
+          "type": "function"
+        },
+        {
+          "constant": false,
+          "inputs": [
+            {
+              "name": "_id",
+              "type": "bytes32"
+            },
+            {
+              "name": "_value",
+              "type": "string"
+            }
+          ],
+          "name": "fillRequest",
+          "outputs": [],
+          "payable": false,
+          "stateMutability": "nonpayable",
+          "type": "function"
+        }
+      ]
+    }
+  }
+}

docker-compose.yml

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+version: '3'
+services:
+    app:
+        build: .
+        env_file:
+            - .env
+        depends_on:
+            - ganache-cli
+        command: ["./wait-for-it.sh", "ganache-cli:8545", "--", "npm", "start"]
+    ganache-cli:
+        image: "trufflesuite/ganache-cli"
+        command: ganache-cli -d
+        ports:
+            - 8545:8545
+            - 8546:8546

index.js

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+/* eslint no-console: 0 */
+const Web3 = require('web3');
+const config = require('config');
+require('dotenv').config();
+
+const localProviderUrl = 'http://127.0.0.1:8545';
+const localProvider = new Web3.providers.WebsocketProvider(localProviderUrl);
+const web3 = new Web3(localProvider);
+
+web3.eth.accounts.wallet.add(process.env.PRIVATE_KEY);
+
+
+const oracleContract = new web3.eth.Contract(config.get('contracts.oracle.abi'), process.env.ORACLE_ADDRESS);
+
+oracleContract.events.DataRequested()
+  .on('data', (event) => {
+    console.log(event);
+
+    oracleContract.methods.fillRequest(event.returnValues.id, '1').send({
+      from: process.env.PUBLIC_KEY,
+      gas: 200000,
+    }).then(console.log);
+  })
+  .on('error', console.error);