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)

Synchronizing the Network

In the previous chapters, we built a network that was made up of five nodes. Every node was aware of all the other nodes in the network, which created a decentralized blockchain network. We now need to create a synchronized network, so that the blockchain on every node is the same and data is consistent throughout. We can't afford to have different versions of the blockchains running on different nodes, because this would totally destroy the purpose of having a blockchain. There should only be one version of the blockchain that is consistent across every node. Therefore, in this chapter, let's synchronize the network that we built in Chapter 4, Creating a Decentralized Blockchain Network. We'll do this by broadcasting transactions and new blocks that have been mined across all the nodes in the network.

In this chapter, the following topics...