This chapter focuses on how blockchain and smart contracts have penetrated the industry. We start this chapter by introducing the concept of the Internet of Money, and explore how smart contracts have started affecting technology, society, and economics in various industries. Specifically, we will explore 18 use cases for blockchains and 12 use cases for smart contracts. We conclude this chapter by designing various modules of a command-line interface-based, decentralized, microblogging platform and deploy it over a private blockchain.

After studying this chapter, you will be able to:

• Appreciate the concept of the Internet of Money
• Know about various use cases for smart contracts and blockchains
• Understand the building blocks of a microblogging DApp
• Explore the security and administrative properties of a DApp