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Adds tutorial code
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‎.babelrc‎

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{
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"presets": ["es2015", "stage-2", "stage-3"]
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}

‎.gitignore‎

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# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
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# dependencies
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/node_modules
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/.pnp
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.pnp.js
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# testing
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/coverage
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# production
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/build
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# misc
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.DS_Store
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.env
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.env.local
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.env.development.local
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.env.test.local
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.env.production.local
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npm-debug.log*
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yarn-debug.log*
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yarn-error.log*

‎migrations/1_initial_migration.js‎

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const Migrations = artifacts.require("Migrations");
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module.exports = function(deployer) {
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deployer.deploy(Migrations);
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};

‎package-lock.json‎

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‎package.json‎

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{
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"name": "eth-marketplace",
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"version": "0.1.0",
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"description": "An Ethereum Marketplace",
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"author": "[email protected]",
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"dependencies": {
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"babel-polyfill": "6.26.0",
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"babel-preset-env": "1.7.0",
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"babel-preset-es2015": "6.24.1",
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"babel-preset-stage-2": "6.24.1",
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"babel-preset-stage-3": "6.24.1",
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"babel-register": "6.26.0",
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"bootstrap": "4.3.1",
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"chai": "4.2.0",
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"chai-as-promised": "7.1.1",
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"chai-bignumber": "3.0.0",
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"react": "16.8.4",
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"react-bootstrap": "1.0.0-beta.5",
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"react-dom": "16.8.4",
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"react-scripts": "2.1.3",
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"truffle": "5.0.5",
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"web3": "1.0.0-beta.55"
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},
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"scripts": {
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"start": "react-scripts start",
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"build": "react-scripts build",
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"test": "react-scripts test",
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"eject": "react-scripts eject"
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},
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"eslintConfig": {
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"extends": "react-app"
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},
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"browserslist": [
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">0.2%",
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"not dead",
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"not ie <= 11",
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"not op_mini all"
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]
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}

‎public/favicon.ico‎

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‎public/index.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico" />
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<meta
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name="viewport"
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content="width=device-width, initial-scale=1, shrink-to-fit=no"
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/>
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<meta name="theme-color" content="#000000" />
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<!--
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manifest.json provides metadata used when your web app is installed on a
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user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
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-->
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<link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
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<!--
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Notice the use of %PUBLIC_URL% in the tags above.
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It will be replaced with the URL of the `public` folder during the build.
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Only files inside the `public` folder can be referenced from the HTML.
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Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
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work correctly both with client-side routing and a non-root public URL.
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Learn how to configure a non-root public URL by running `npm run build`.
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-->
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<title>Dapp University Starter Kit</title>
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</head>
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<body>
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<noscript>You need to enable JavaScript to run this app.</noscript>
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<div id="root"></div>
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<!--
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This HTML file is a template.
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If you open it directly in the browser, you will see an empty page.
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You can add webfonts, meta tags, or analytics to this file.
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The build step will place the bundled scripts into the <body> tag.
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To begin the development, run `npm start` or `yarn start`.
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To create a production bundle, use `npm run build` or `yarn build`.
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-->
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</body>
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</html>

‎public/manifest.json‎

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{
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"short_name": "Starter Kit",
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"name": "Dapp University Starter Kit",
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"icons": [
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{
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"src": "favicon.ico",
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"sizes": "64x64 32x32 24x24 16x16",
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"type": "image/x-icon"
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}
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],
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"start_url": ".",
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"display": "standalone",
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"theme_color": "#000000",
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"background_color": "#ffffff"
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}

‎src/components/App.css‎

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/* Styles go here */

‎src/components/App.js‎

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import React, { Component } from 'react';
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import logo from '../logo.png';
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import './App.css';
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import Web3 from 'web3'
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class App extends Component {
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async componentWillMount() {
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// Load Web3
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let web3 = new Web3('https://mainnet.infura.io/v3/953247d0c42b419aa3416810d625cc8c')
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// Fetch latest block
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let latestBlock = await web3.eth.getBlock('latest')
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console.log('latest block', latestBlock)
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this.setState({
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blockNumber: latestBlock.number,
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difficulty: latestBlock.difficulty
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})
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// Fetch Gas price
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let gasPrice = await web3.eth.getGasPrice()
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console.log('gasPrice', gasPrice)
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this.setState({
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gasPrice: gasPrice
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})
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// Fetch latest 10 blocks
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let block
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let latestBlocks = []
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for (let i = 0; i < 10; i++) {
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block = await web3.eth.getBlock(latestBlock.number - i)
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console.log(block)
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latestBlocks.push(block)
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}
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this.setState({
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latestBlocks: latestBlocks
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})
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}
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constructor(props) {
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super(props)
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this.state = {
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blockNumber: 0,
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difficulty: 0,
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gasPrice: 0,
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latestBlocks: []
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}
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}
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render() {
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return (
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<div>
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<nav className="navbar navbar-dark fixed-top bg-dark flex-md-nowrap p-0 shadow">
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<a
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className="navbar-brand col-sm-3 col-md-2 mr-0"
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href="http://www.dappuniversity.com/bootcamp"
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target="_blank"
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rel="noopener noreferrer"
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>
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Dapp University
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</a>
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</nav>
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<div className="container-fluid mt-5">
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<div className="row">
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<main role="main" className="col-lg-12 d-flex text-center">
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<div className="content mr-auto ml-auto" style={{ width: '800px' }}>
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<h5>Ethereum Blockchain Explorer</h5>
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<div className="row">
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<div className="col-4">
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<div className="bg-light pt-4 pb-3 m-1">
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<h5>Latest Block</h5>
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<p>{this.state.blockNumber}</p>
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</div>
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</div>
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<div className="col-4">
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<div className="bg-light pt-4 pb-3 m-1">
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<h5>Difficulty</h5>
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<p>{this.state.difficulty}</p>
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</div>
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</div>
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<div className="col-4">
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<div className="bg-light pt-4 pb-3 m-1">
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<h5>Gas Price</h5>
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<p>{this.state.gasPrice}</p>
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</div>
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</div>
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</div>
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<div className="row">
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<div className="col-lg-12 mt-3">
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<div className="card">
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<div className="card-header">
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<h5>Latest Blocks</h5>
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</div>
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<div className="card-body">
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<table className="table">
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<thead>
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<tr>
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<th scope="col">#</th>
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<th scope="col">Hash</th>
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<th scope="col">Miner</th>
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<th scope="col">Timestamp</th>
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</tr>
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</thead>
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<tbody>
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{ this.state.latestBlocks.map((block, key) => {
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return (
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<tr key={key} >
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<th scope="row">{block.number}</th>
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<td>{block.hash.substring(0,20)}...</td>
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<td>{block.miner.substring(0,20)}...</td>
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<td>{block.timestamp}</td>
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</tr>
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)
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}) }
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</tbody>
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</table>
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</div>
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</div>
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</div>
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</div>
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</div>
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</main>
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</div>
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</div>
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</div>
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);
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}
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}
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export default App;

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