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)

Block Explorer

In this chapter, let's build a block explorer that will allow us to interact with the blockchain. A block explorer is simply a user interface that will allow us to explore the data inside of the blockchain. It will allow us to search for a specific block, specific transaction, or specific address, and then display that particular information in a visually appealing format.

The first thing that we'll do to build the block explorer is to add some new methods and endpoints to the blockchain, in order to search for the data. Then, let's add a frontend to the block explorer, so we can use it in the browser.

In this chapter, we'll cover the following topics:

  • What is a block explorer?
  • Defining the block explorer endpoints
  • Building the getBlock, getTransaction, and getAddressData methods
  • Building and testing /block/:blockHash, /transaction/:transactionId...