Part 3 focuses on the expanding Ethereum ecosystem, covering tokenization of assets, standards, test-driven development; a roadmap that captures the concepts, tools, and techniques introduced in parts 1 and 2; and the opportunities that lie ahead. The concepts of fungible and non-fungible tokens and standards are presented with a real estate token development. You’ll learn to develop JavaScript-based test scripts. I show an intuitive approach to write JS tests and run them by using Truffle test frameworks and commands. I discuss a roadmap and provide a blockchain-based solution to address inefficiency in a certificate program I manage at my institution. I conclude by reviewing many open issues in blockchain technology that the community is actively engaged in solving. Perhaps you can contribute too. You should be looking for opportunities to use blockchain’s trust and integrity features to solve problems.