Book Image

Hands-On Blockchain with Hyperledger

By : Nitin Gaur, Luc Desrosiers, Venkatraman Ramakrishna, Petr Novotny, Salman A. Baset, Anthony O'Dowd
Book Image

Hands-On Blockchain with Hyperledger

By: Nitin Gaur, Luc Desrosiers, Venkatraman Ramakrishna, Petr Novotny, Salman A. Baset, Anthony O'Dowd

Overview of this book

Blockchain and Hyperledger technologies are hot topics today. Hyperledger Fabric and Hyperledger Composer are open source projects that help organizations create private, permissioned blockchain networks. These find application in finance, banking, supply chain, and IoT among several other sectors. This book will be an easy reference to explore and build blockchain networks using Hyperledger technologies. The book starts by outlining the evolution of blockchain, including an overview of relevant blockchain technologies. You will learn how to configure Hyperledger Fabric and become familiar with its architectural components. Using these components, you will learn to build private blockchain networks, along with the applications that connect to them. Starting from principles first, you’ll learn to design and launch a network, implement smart contracts in chaincode and much more. By the end of this book, you will be able to build and deploy your own decentralized applications, handling the key pain points encountered in the blockchain life cycle.
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Packt Upsell

Examining the live network

Great–now that we've seen how the types of participants, assets, transactions, and events are defined in the business network, let's see how instances of these types are created. The Playground tool has another feature that is very nice–it allows us to look inside the business network, while it's running, to see instances of these types, and select the Test tab at the top of the Playground page:

You'll see that the view has changed a little. On the left-hand side, we can see the participants, assets, and transactions that have been defined for this business network: Bank, BankEmployee, Customer, and LetterOfCredit, as well as transactions. You can select these, and as you do, you'll see that the right-hand pane changes. Try it! Select the LetterOfCredit asset, and on the right-hand pane, you'll see the following (expand the view with Show All):

Wow–this is interesting! This is an actual letter of credit from our application. Let's have a look at the letter in detail...