Book Image

Building Blockchain Projects

By : Narayan Prusty
Book Image

Building Blockchain Projects

By: Narayan Prusty

Overview of this book

Blockchain is a decentralized ledger that maintains a continuously growing list of data records that are secured from tampering and revision. Every user is allowed to connect to the network, send new transactions to it, verify transactions, and create new blocks, making it permission-less. This book will teach you what blockchain is, how it maintains data integrity, and how to create real-world blockchain projects using Ethereum. With interesting real-world projects, you will learn how to write smart contracts which run exactly as programmed without any chance of fraud, censorship, or third-party interference, and build end-to-e applications for blockchain. You will learn about concepts such as cryptography in cryptocurrencies, ether security, mining, smart contracts, solidity, and more. You will also learn about web sockets, various API services for Ethereum, and much more. The blockchain is the main technical innovation of bitcoin, where it serves as the public ledger for bitcoin transactions.

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Table of Contents (16 chapters)
Title Page
Title Page
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Customer Feedback
Customer Feedback
Preface
Preface
Free Chapter
1
Understanding Decentralized Applications
Understanding Decentralized Applications
What is a DApp?
Decentralized autonomous organization
User identity in DApps
User accounts in DApps
Accessing the centralized apps
Internal currency in DApps
What are permissioned DApps?
Popular DApps
Summary
2
Understanding How Ethereum Works
Understanding How Ethereum Works
Overview of Ethereum
Ethereum accounts
Transactions
Consensus
Timestamp
Nonce
Block time
Forking
Genesis block
Ether denominations
Ethereum virtual machine
Gas
Peer discovery
Whisper and Swarm
Geth
Ethereum Wallet
Mist
Weaknesses
Serenity
Summary
3
Writing Smart Contracts
Writing Smart Contracts
Solidity source files
The structure of a smart contract
Data location
What are the different data types?
Control structures
Creating contracts using the new operator
Exceptions
External function calls
Features of contracts
Libraries
Returning multiple values
Importing other Solidity source files
Globally available variables
Ether units
Proof of existence, integrity, and ownership contract
Compiling and deploying contracts
Summary
4
Getting Started with web3.js
Getting Started with web3.js
Introduction to web3.js
Building a client for an ownership contract
Summary
5
Building a Wallet Service
Building a Wallet Service
Difference between online and offline wallets
hooked-web3-provider and ethereumjs-tx libraries
What is a hierarchical deterministic wallet?
Introduction to key derivation functions
Introduction to LightWallet
Building a wallet service
Summary
6
Building a Smart Contract Deployment Platform
Building a Smart Contract Deployment Platform
Calculating a transaction's nonce
Introducing solcjs
Building a contract deployment platform
Summary
7
Building a Betting App
Building a Betting App
Introduction to Oraclize
Working with strings
Building the betting contract
Building a client for the betting contract
Summary
8
Building Enterprise Level Smart Contracts
Building Enterprise Level Smart Contracts
Exploring ethereumjs-testrpc
What are event topics?
Getting started with truffle-contract
Introduction to truffle
Summary
9
Building a Consortium Blockchain
Building a Consortium Blockchain
What is a consortium blockchain?
What is Proof-of-Authority consensus?
Introduction to parity
Summary

About the Author

Narayan Prusty is a full-stack developer, with five years of experience in the field. He specializes in Blockchain and JavaScript. His commitment has led him to build scalable products for startups, the government, and enterprises across India, Singapore, USA, and UAE. 

At present, Ethereum, Bitcoin, Hyperledger, IPFS, Ripple, and so on are some of the things he uses on a regular basis to build decentralized applications. Currently, he is a full-time Blockchain SME (Subject-Matter Expert) at Emirates National Bank of Dubai.  

He has already written two books on JavaScript titled Learning ECMAScript 6 and Modern JavaScript Applications. Both these books were reviewed and published by Packt. 

He starts working on something immediately if he feels it’s exciting and solves real work problems. He built an MP3 search engine at the age of 18, and since then, he has built various other applications, which are used by people around the globe. His ability to to build scalable applications from top to bottom is what makes him special.

Currently, he is on a mission to make things easier, faster, and cheaper using the blockchain technology. Also, he is looking at possibilities to prevent corruptions, fraud, and to bring transparency to the world using blockchain technology.You can learn more from him from his blog http://qnimate.com  and you can reach him out at LinkedIn https://www.linkedin.com/in/narayanprusty/.

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