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Learn Blockchain Programming with JavaScript

Explore the essentials of blockchain technology with JavaScript to develop highly secure bitcoin-like applications
Learn Blockchain Programming with JavaScript Book Cover
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Learn Blockchain Programming with JavaScript

Eric Traub
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Explore the essentials of blockchain technology with JavaScript to develop highly secure bitcoin-like applications
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Book Details

ISBN 139781789618822
Paperback252 pages

Book Description

Learn Blockchain Programming with JavaScript begins by giving you a clear understanding of what a blockchain technology is. You’ll then set up an environment to build your very own blockchain and learn to 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 will 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 network functions and why decentralization is such an important feature for securing a blockchain.

Table of Contents

Chapter 1: Setting up the Project
What is a blockchain?
What you will learn...
Environment setup
Summary
Chapter 2: Building a Blockchain
Before we get building...
Blockchain constructor function
Building the createNewBlock method
Building the getLastBlock method
Creating the createNewTransaction method
 Hashing the data
What is a Proof of Work?
Creating a genesis block
Summary
Chapter 3: Accessing the Blockchain through an API
Setting up Express.js
Building the API foundation
Installing Postman and body-parser
Building the /blockchain endpoint
Building the /transaction endpoint
Building the /mine endpoint
Testing the endpoints
Summary
Chapter 4: Creating a Decentralized Blockchain Network
Creating multiple nodes
Adding the currentNodeUrl
New endpoints outline
Building  the /register-and-broadcast-node endpoint 
Building the  /register-node endpoint
Building the /register-nodes-bulk endpoint
Testing all of the network endpoints
Summary
Chapter 5: Synchronizing the Network
Understanding the need to synchronize the network 
Refactoring the createNewTransaction method and the /transaction endpoint
Building the /transaction/broadcast endpoint
Refactoring the /transaction endpoint
Testing the transaction endpoints
Updating the mining information
Building the /receive-new-block endpoint
Testing the new and updated /mine endpoints
Summary
Chapter 6: Consensus Algorithms
What is the consensus algorithm ?
Building the chainIsValid method
Building the /consensus endpoint
Summary
Chapter 7: Block Explorer
What is a block explorer? 
Defining the block explorer endpoints 
Building the getBlock method
Building the /block/:blockHash endpoint
Defining the getTransaction method
Building the /transaction/:transactionId endpoint
Building the getAddressData method
Developing the /address/:address endpoint
Adding the block explorer file
Block explorer file explanation
Testing our block explorer
Summary 
Chapter 8: In conclusion...
A quick review
Areas of improvement

What You Will Learn

  • Gain an in-depth understanding of blockchain and the environment setup
  • Create your very own decentralized blockchain network from scratch
  • Build and test the various endpoints necessary to create a decentralized network
  • Learn about proof-of-work and the hashing algorithm used to secure data
  • Mine new blocks, create new transactions, and store the transactions in blocks
  • Explore the consensus algorithm and use it to synchronize the blockchain network

Authors

Table of Contents

Chapter 1: Setting up the Project
What is a blockchain?
What you will learn...
Environment setup
Summary
Chapter 2: Building a Blockchain
Before we get building...
Blockchain constructor function
Building the createNewBlock method
Building the getLastBlock method
Creating the createNewTransaction method
 Hashing the data
What is a Proof of Work?
Creating a genesis block
Summary
Chapter 3: Accessing the Blockchain through an API
Setting up Express.js
Building the API foundation
Installing Postman and body-parser
Building the /blockchain endpoint
Building the /transaction endpoint
Building the /mine endpoint
Testing the endpoints
Summary
Chapter 4: Creating a Decentralized Blockchain Network
Creating multiple nodes
Adding the currentNodeUrl
New endpoints outline
Building  the /register-and-broadcast-node endpoint 
Building the  /register-node endpoint
Building the /register-nodes-bulk endpoint
Testing all of the network endpoints
Summary
Chapter 5: Synchronizing the Network
Understanding the need to synchronize the network 
Refactoring the createNewTransaction method and the /transaction endpoint
Building the /transaction/broadcast endpoint
Refactoring the /transaction endpoint
Testing the transaction endpoints
Updating the mining information
Building the /receive-new-block endpoint
Testing the new and updated /mine endpoints
Summary
Chapter 6: Consensus Algorithms
What is the consensus algorithm ?
Building the chainIsValid method
Building the /consensus endpoint
Summary
Chapter 7: Block Explorer
What is a block explorer? 
Defining the block explorer endpoints 
Building the getBlock method
Building the /block/:blockHash endpoint
Defining the getTransaction method
Building the /transaction/:transactionId endpoint
Building the getAddressData method
Developing the /address/:address endpoint
Adding the block explorer file
Block explorer file explanation
Testing our block explorer
Summary 
Chapter 8: In conclusion...
A quick review
Areas of improvement

Book Details

ISBN 139781789618822
Paperback252 pages
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