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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
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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

Creating a genesis block

One more thing that we would have to add to our blockchain data structure is the genesis block. But what is a genesis block? Well, a genesis block is simply the first block in any blockchain.

To create our genesis block, we are going to use the createNewBlock method inside of the Blockchain() constructor function. Go to the dev/blockchain.js file, and inside of the blockchain constructor function type in the following highlighted lines of code:

function Blockchain () {
this.chain = [];
this.pendingTransactions =[];
this.createNewBlock();
}

As we observed in the previous section, the createNewBlock method takes in the value of a nonce, a previousBlockHash, and a hash as parameters. Since we're using the createNewBlock method over here to create the genesis block, we are not going to have any of those mentioned parameters. Instead...

You have been reading a chapter from
Learn Blockchain Programming with JavaScript
Published in: Nov 2018
Publisher: Packt
ISBN-13: 9781789618822
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