Book Image

Learn Blockchain Programming with JavaScript

By : Eric Traub
Book Image

Learn Blockchain Programming with JavaScript

By: Eric Traub

Overview of this book

Learn Blockchain Programming with JavaScript begins by giving you a clear understanding of what blockchain technology is. You’ll then set up an environment to build your very own blockchain and you’ll add various functionalities to it. By adding functionalities to your blockchain such as the ability to mine new blocks, create transactions, and secure your blockchain through a proof-of-work you’ll gain an in-depth understanding of how blockchain technology functions. As you make your way through the chapters, you’ll learn how to build an API server to interact with your blockchain and how to host your blockchain on a decentralized network. You’ll also build a consensus algorithm and use it to verify data and keep the entire blockchain network synchronized. In the concluding chapters, you’ll finish building your blockchain prototype and gain a thorough understanding of why blockchain technology is so secure and valuable. By the end of this book, you'll understand how decentralized blockchain networks function and why decentralization is such an important feature for securing a blockchain.
Table of Contents (10 chapters)

What is a block explorer?

A block explorer is an online platform that allows you to navigate through the blockchain, searching for various things including addresses, blocks, transactions, and so on. For example, if you visit, you can see a block explorer utility for the Bitcoin and Ethereum blockchains, as follows:

Inside of this block explorer, you can search the entire blockchain for a specific block, hash, or transaction, or any other piece of data that is required. The utility also displays results on an interface that's easy to understand. For example, if we search for Block #549897 in the block explorer, you'll see all the details of that particular block, as seen in the following screenshot:

This is exactly what we're going to build for our blockchain in this chapter.