In this chapter, we learned how to create a business network using Hyperledger Composer and the Watson IoT Platform.

In the process of developing the solution, we were able to create a Hyperledger Composer project using Yeoman; define shared data structures; create assets, participants transactions, and access control lists; as well as create the first version of a network and upgrade it to a newer version.

We were also able to create a device that is responsible for reading temperatures from the hypothetical transport of a food box from a factory to a warehouse, and later, from the warehouse to a store, and added that information to the food box asset in the shared ledger of the blockchain network.

The consumer of that food box was also able to track the information related to that box from the very beginning of the production chain.

Even though Hyperledger Composer and Watson IoT development are quite simple, the solution that we've created addresses a huge problem regarding safety in the food chain. 

The following chapters will give you the author's point of view about lessons learned, practices, and patterns used in real-world projects, and how IoT and blockchain are necessary tools for creating business models and addressing new challenges in the current Industry 4.0 scenario.