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
Foreword
Contributors
Preface
Index

Testing the end-to-end process


With all of the configuration done, we will run through a simple scenario that will allow us to test our configuration and ensure that everything is working smoothly.

The scenario will consist of addressing the need to add a new transaction. In order to deliver this new feature, we will perform the following steps/tests:

  1. Create a new transaction for our business network. Once we are done coding, we will then try to do the following:
    1. Push a commit to the master branch directly
    2. Submit a pull request with an unsigned commit
  1. Add test cases to cover our new transaction:
    1. Amend our commit to be signed
    2. Add our test case and submit an additional signed commit
  2. Release the new version of the business network
    1. Merge the pull request on the master branch
    2. Create a new release and check that the BNA is published

Creating a new transaction

For the purpose of our tests, we will keep the new transaction relatively simple: our transaction will merge two assets into one, adding their value...