Book Image

Blockchain with Hyperledger Fabric - Second Edition

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

Blockchain with Hyperledger Fabric - Second Edition

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

Overview of this book

Blockchain with Hyperledger Fabric - Second Edition is a refreshed and extended version of the successful book on practical Hyperledger Fabric blockchain development. This edition includes many new chapters, alongside comprehensive updates and additions to the existing ones. Entirely reworked for Hyperledger Fabric version 2, this edition will bring you right up to date with the latest in blockchain. Using a real-world Trade Finance and Logistics example, with working code available on GitHub, you’ll really understand both how and why Hyperledger Fabric can be used to maximum effect. This book is your comprehensive guide and reference to explore and build blockchain networks using Hyperledger Fabric version 2. This edition of the book begins by outlining the evolution of blockchain, including an overview of relevant blockchain technologies. Starting from first principles, you’ll learn how to design and operate a permissioned blockchain network based on Hyperledger Fabric version 2. You will learn how to configure the main architectural components of a permissioned blockchain network including Peers, Orderers, Certificate Authorities, Channels, and Policies. You’ll then learn how to design, develop, package, and deploy smart contracts, and how they are subsequently used by applications. This edition also contains chapters on DevOps, blockchain governance, and security, making this your go-to book for Hyperledger Fabric version 2.
Table of Contents (18 chapters)
16
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17
Index

Fabric application model and architecture

In earlier chapters, we saw how Hyperledger Fabric can be viewed as a transaction processing system over a distributed database (corresponding to channel ledgers) maintained by the network peers, exposing information through a set of views. It is the developer's job to expose the assets and data items in the ledgers, as well as the transactions and queries on them, in a way that hides the complexity of the underlying network and channel architecture. In addition, the developer must provide differentiated capabilities to various enterprise users affiliated with the network's organizations, with appropriate security and privacy safeguards built in. Figure 9.2 illustrates what such a distributed Fabric application looks like:

Figure 9.2: Typical three-layer architecture of a Hyperledger Fabric application

As we can see, the Network layer at the bottom, consisting of network peers, ordering nodes, and CAs, is the infrastructure...