Blockchain is a revolutionary technology that shook the core of the finance world. However, Blockchain is not just about cryptocurrency.This book focuses on blockchain, its features, and the core technologies used to build the Blockchain network. In the first section, you will learn about blockchain in-depth. You will learn how these currencies work and how you can build your applications using them. This edition focuses on Ethereum as a platform for building decentralized applications (DApps) and smart contract development using Solidity. You will learn about decentralized databases like OrbitDB, BigchainDB, TiesDB, and Bluzelle, and understand their role in building next-generation applications. You will also learn about various databases and how to use them in detail. Lastly, you will understand how the existing DApps work, their architecture, and how they are incorporated into the application for the end-user.