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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

Defining the block explorer endpoints

In order for the block explorer to function correctly, we'll need to query the blockchain for addresses, block hashes, and transaction IDs so that we can search for a particular parameter and get that particular piece of data in return. Consequently, the first step that we'll need to carry out is to build a few more endpoints. To do this, lets proceed with the following steps:

  1. Go to the dev/networkNode.js file and after the /consensus endpoint, let's define the first endpoint of our block explorer, /block/:blockHash, as follows:
app.get('/block/:blockHash', function(req, res) { 

});

A specific blockHash will be sent with this endpoint, which, as a result, will simply return to us the block that the input of blockHash corresponds to.

  1. The next endpoint that we'll build will be /transaction/:transactionId....
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