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 that are used to build the Blockchain network. In the first section, you will learn about Blockchain in-depth. Then, the book covers the two most popular Cryptocurrencies - Bitcoin and Ethereum. You will learn how these currencies work and how you can build your applications using these currencies. Moving on, you will learn about the decentralized databases. Decentralized databases can be used to build next-generation software applications. You will learn about various databases and how to use them in detail. Lastly, you will learn how the existing decentralized applications work, their architecture, and how they are incorporated into the application for the end-user.