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)

Summary

Up to now, you've achieved a lot in this book. You have created a decentralized blockchain network that's currently running across five nodes, and you built the functionality to synchronize the entire network, so that all the nodes have the exact same data. This mirrors how a blockchain would function in a real-world application.

In this chapter, we successfully synchronized the entire blockchain network by refactoring the endpoints to broadcast the data to all the nodes present in the network. We started by splitting the functionality of the /createNewTransaction method into two separate parts: the /createNewTransaction method and the addTransactionToPendingTransactions method. Then, we built the /transaction/broadcast endpoint to broadcast the newly created transaction to all the nodes in the network. We also refactored the /transaction endpoint, so that the...