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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

Building the /consensus endpoint

Now, let's build the /consensus endpoint, which will use the chainIsValid method that we built in the previous section. Carry out the following steps to build the endpoint:

  1. Let's go to networkNode.js file and, after the /register-node-bulk endpoint, define the /consensus endpoint as follows:
app.get('/consensus', function(req, res) { 

});
  1. Next, inside of the /consensus endpoint, let's make a request to every other node inside of the blockchain network to get their copies of the blockchain and compare them to the copy of the blockchain that's hosted on the current node that we're currently on:
app.get('/consensus', function(req, res) {
bitcoin.networkNodes.forEach(networkNodeUrl => {

});

});
  1. Inside of this forEach loop, let's do the same things that we've done...
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