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)

Developing the /address/:address endpoint

Now, let's build the /address/:address endpoint and we'll use the getAddressData method inside of this endpoint. The /address/:address endpoint will be very similar to the /block/:blockHash and /transaction/:transactionId endpoints, so you shouldn't find it too challenging:

  1. The first thing that we want to do inside of the endpoint is to store the address in a variable:
app.get('/address/:address', function(req, res) {
const address = req.params.address;
});
  1. The next thing that we want to do is use the getAddressData method to get all of the data for the given address. In order to do that, we will add the following highlighted code to the endpoint:
app.get('/address/:address', function(req, res) {
const address = req.params.address;
bitcoin.getAddressData(address);
});
  1. From this method...