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)

Refactoring the createNewTransaction method and the /transaction endpoint

In this section, let's refactor the createNewTransaction method by splitting it into two separate parts. One part will simply create a new transaction and then return that transaction, and the other part will push the new transaction into the pendingTransactions array. We'll do the latter part by creating a separate method for it. We also create a new transaction endpoint called /transaction/broadcast. This endpoint will allow us to broadcast transactions throughout the entire blockchain network, so that every node has the same data and so that the entire network is synchronized.

Modifications to the createNewTransaction method

Here, let&apos...