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Building Blockchain Projects

You're reading from Building Blockchain Projects Building decentralized Blockchain applications with Ethereum and Solidity

Product type Paperback

Published in Apr 2017

Publisher Packt

ISBN-13 9781787122147

Length 266 pages

Edition 1st Edition

Languages

Solidity

Tools

Blockchain

Concepts

Blockchain

Author (1):

Narayan Prusty

View More author details

Table of Contents (10) Chapters

Preface

1. Understanding Decentralized Applications FREE CHAPTER

2. Understanding How Ethereum Works

3. Writing Smart Contracts

4. Getting Started with web3.js

5. Building a Wallet Service

6. Building a Smart Contract Deployment Platform

7. Building a Betting App

8. Building Enterprise Level Smart Contracts

9. Building a Consortium Blockchain

Introduction to web3.js

web3.js provides us with JavaScript APIs to communicate with geth. It uses JSON-RPC internally to communicate with geth. web3.js can also communicate with any other kind of Ethereum node that supports JSON-RPC. It exposes all JSON-RPC APIs as JavaScript APIs; that is, it doesn't just support all the Ethereum-related APIs; it also supports APIs related to Whisper and Swarm.

You will learn more and more about web3.js as we build various projects, but for now, let's go through some of the most used APIs of web3.js and then we will build a frontend for our ownership smart contract using web3.js.

At the time of writing this, the latest version of web3.js is 0.16.0. We will learn everything with respect to this version.

web3.js is hosted at https://github.com/ethereum/web3.js and the complete documentation is hosted at https://github.com/ethereum/wiki/wiki/JavaScript-API.

Importing web3.js

To use web3.js in Node.js, you can simply run npm install web3 inside your project directory...

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Authors (1)

Narayan Prusty

Narayan Prusty

Narayan Prusty is a full-stack developer. He works as a consultant for various start-ups around the world. He has worked on various technologies and programming languages but is very passionate about JavaScript, WordPress, Ethereum, Solr, React, Cordova, MongoDB, and AWS. Apart from consulting for various start-ups, he also runs a blog titled QNimate and a video tutorial site titled QScutter, where he shares information about a lot of the technologies he works on.

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