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)

Testing all of the network endpoints

From what we have learned in the preceding section, we know that our register-node route and that the register-nodes-bulk route are both working correctly. So, in this section, let's put it all together and test our register-and-broadcast-node route, which uses the both the register-node route and the register-nodes-bulk route.

The register-and-broadcast-node endpoint will allow us to build a decentralized blockchain network by allowing us to create a network and add new nodes to it. Let's jump right into our first example to get a better understanding of it. To understand how the register-and-broadcast-node route works, we'll make use of Postman.

In the Postman application, we want to make a post request to register and broadcast the node on localhost:3001. However, before we do that, just make sure that all four nodes are...