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Learn Blockchain Programming with JavaScript

You're reading from   Learn Blockchain Programming with JavaScript Build your very own Blockchain and decentralized network with JavaScript and Node.js

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Product type Paperback
Published in Nov 2018
Publisher Packt
ISBN-13 9781789618822
Length 252 pages
Edition 1st Edition
Languages
Concepts
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Author (1):
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Eric Traub Eric Traub
Author Profile Icon Eric Traub
Eric Traub
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Table of Contents (10) Chapters Close

Preface 1. Setting up the Project 2. Building a Blockchain FREE CHAPTER 3. Accessing the Blockchain through an API 4. Creating a Decentralized Blockchain Network 5. Synchronizing the Network 6. Consensus Algorithms 7. Block Explorer 8. In conclusion... 9. Other Books You May Enjoy

Summary

All blockchains have a consensus algorithm, and in this chapter, we built our own consensus algorithm that implements the longest chain rule. We started by building the chainIsValid method. In this method, we simply iterated through every single block inside of the blockchain, and compared hashes on every block to make sure that they are correct. Then we moved on to test the method. In addition to this, we built the /consensus endpoint with the help of the chainIsValid method.

In the next chapter, we're going to build a block explorer that we'll be able to access on the browser. This block explorer will allow us to interact with the blockchain through a user interface.

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