Book Image

Blockchain Developer's Guide

By : Brenn Hill, Samanyu Chopra, Paul Valencourt, Narayan Prusty
Book Image

Blockchain Developer's Guide

By: Brenn Hill, Samanyu Chopra, Paul Valencourt, Narayan Prusty

Overview of this book

Blockchain applications provide a single-shared ledger to eliminate trust issues involving multiple stakeholders. It is the main technical innovation of Bitcoin, where it serves as the public ledger for Bitcoin transactions. Blockchain Developer's Guide takes you through the electrifying world of blockchain technology. It begins with the basic design of a blockchain and elaborates concepts, such as Initial Coin Offerings (ICOs), tokens, smart contracts, and other related terminologies. You will then explore the components of Ethereum, such as Ether tokens, transactions, and smart contracts that you need to build simple DApps. Blockchain Developer's Guide also explains why you must specifically use Solidity for Ethereum-based projects and lets you explore different blockchains with easy-to-follow examples. You will learn a wide range of concepts - beginning with cryptography in cryptocurrencies and including ether security, mining, and smart contracts. You will learn how to use web sockets and various API services for Ethereum. By the end of this Learning Path, you will be able to build efficient decentralized applications. This Learning Path includes content from the following Packt products: • Blockchain Quick Reference by Brenn Hill, Samanyu Chopra, Paul Valencourt • Building Blockchain Projects by Narayan Prusty
Table of Contents (37 chapters)
Title Page
About Packt

Popular DApps

Now that we have some high-level knowledge about what DApps are and how they are different from centralized apps, let's explore some of the popular and useful DApps. While exploring these DApps, we will explore them at a level that is enough to understand how they work and tackle various issues instead of diving too deep.


Bitcoin is a decentralized currency. Bitcoin is the most popular DApp and its success is what showed how powerful DApps can be and encouraged people to build other DApps.

Before we get into further details about how Bitcoin works and why people and the government consider it to be a currency, we need to learn what ledgers and blockchains are.

What is a ledger?

A ledger is basically a list of transactions. A database is different from a ledger. In a ledger, we can only append new transactions, whereas in a database, we can append, modify, and delete transactions. A database can be used to implement a ledger.

What is blockchain?

A blockchain is a data structure...