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Blockchain Development with Hyperledger

By : Salman A. Baset, Luc Desrosiers, Nitin Gaur, Petr Novotny, Anthony O'Dowd, Venkatraman Ramakrishna, Weimin Sun, Xun (Brian) Wu
Book Image

Blockchain Development with Hyperledger

By: Salman A. Baset, Luc Desrosiers, Nitin Gaur, Petr Novotny, Anthony O'Dowd, Venkatraman Ramakrishna, Weimin Sun, Xun (Brian) Wu

Overview of this book

Blockchain and Hyperledger are open source technologies that power the development of decentralized applications. This Learning Path is your helpful reference for exploring and building blockchain networks using Ethereum, Hyperledger Fabric, and Hyperledger Composer. Blockchain Development with Hyperledger will start off by giving you an overview of blockchain and demonstrating how you can set up an Ethereum development environment for developing, packaging, building, and testing campaign-decentralized applications. You'll then explore the de facto language Solidity, which you can use to develop decentralized applications in Ethereum. Following this, you'll be able to configure Hyperledger Fabric and use it to build private blockchain networks and applications that connect to them. Toward the later chapters, you'll learn how to design and launch a network, and even implement smart contracts in chain code. By the end of this Learning Path, you'll be able to build and deploy your own decentralized applications by addressing the key pain points encountered in the blockchain life cycle. This Learning Path includes content from the following Packt products: • Blockchain Quick Start Guide by Xun (Brian) Wu and Weimin Sun • Hands-On Blockchain with Hyperledger by Nitin Gaur et al.

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Blockchain Development with Hyperledger
Salman A. Baset | Luc Desrosiers | Nitin Gaur | Petr Novotny | Anthony O'Dowd | Venkatraman Ramakrishna | Weimin Sun | Xun (Brian) Wu
Mar, 2019 | 10 hours 36 minutes
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Table of Contents (25 chapters)
Title Page
Title Page
Copyright
Copyright
About Packt
About Packt
Contributors
Contributors
Preface
Preface
Free Chapter
1
Blockchain - Enterprise and Industry Perspective
Blockchain - Enterprise and Industry Perspective
Defining the terms – what is a blockchain?
Four core building blocks of blockchain framworks
Fundamentals of the secure transaction processing protocol
Where blockchain technology has been and where it's going
Industries putting blockchain technology to work
Blockchain in the enterprise
Enterprise design principles
Business considerations for choosing a blockchain framework
Technology considerations for choosing a blockchain framework
Enterprise integration and designing for extensibility
Other considerations
Summary
2
Exploring Hyperledger Fabric
Exploring Hyperledger Fabric
Hyperledger frameworks, tools, and building blocks
Hyperledger Fabric component design
Hyperledger Fabric – the journey of a sample transaction
Hyperledger Fabric explored
Understanding governance in business networks powered by blockchain
Summary
3
Setting the Stage with a Business Scenario
Setting the Stage with a Business Scenario
Trading and letter of credit
Business scenario and use case
Setting up the development environment
Network components' configuration files
Launching a sample trade network
Summary
4
Designing a Data and Transaction Model with Golang
Designing a Data and Transaction Model with Golang
Starting the chaincode development
Creating a chaincode
Access control
Implementing chaincode functions
Testing chaincode
Chaincode design topics
Logging output
Summary
5
Exposing Network Assets and Transactions
Exposing Network Assets and Transactions
Building a complete application
Integration with existing systems and processes
Summary
6
Business Networks
Business Networks
A busy world of purposeful activity
Defining business networks
Introducing participants
Introducing assets
Introducing transactions
Discussing events from the perspective of designing a business network using Composer
Implementing a business network
Summary
7
A Business Network Example
A Business Network Example
The letter of credit sample
Analyzing the letter of credit process
A description of the business network
A model of the business network
Examining the live network
Creating business network APIs
Summary
8
Agility in a Blockchain Network
Agility in a Blockchain Network
Defining the promotion process
Configuring a continuous integration pipeline
Configuring your Git repository
Testing the end-to-end process
Updating the network
Summary
9
Life in a Blockchain Network
Life in a Blockchain Network
Modifying or upgrading a Hyperledger Fabric application
System monitoring and performance
Summary
10
Governance, Necessary Evil of Regulated Industries
Governance, Necessary Evil of Regulated Industries
Decentralization and governance
Exploring the business models
Role of governance in a business network
Business domains and processes
Governance structure
Governance and the IT solution
Summary
11
Hyperledger Fabric Security
Hyperledger Fabric Security
Hyperledger Fabric design goals impacting security
Hyperledger Fabric architecture 
Network bootstrap and governance – the first step towards security
Strong identities – the key to the security of the Hyperledger Fabric network
Chaincode security
Common threats and how Hyperledger Fabric mitigates them 
Hyperledger Fabric and Quantum Computing
General data protection regulation (GDPR) considerations
Summary
12
Introduction to Blockchain Technology
Introduction to Blockchain Technology
The genealogy analogy
The consensus mechanism
Enterprise blockchain – Hyperledger
The evolution of blockchain
Summary
13
Ethereum Fundamentals
Ethereum Fundamentals
An overview of Ethereum
Ethereum basic concepts
Performance
Summary
14
Overview of Solidity Programming
Overview of Solidity Programming
What is solidity?
Tools for solidity development environment
Introduction to smart contracts
Common smart contract patterns
Smart contract security
Case study – crowdfunding campaign
Summary
15
Building an Ethereum Blockchain Application
Building an Ethereum Blockchain Application
Decentralized application overview
DApp development tools
Setting up an Ethereum development environment
Deploying a smart contract
Writing a campaign decentralized application
Summary
16
Exploring an Enterprise Blockchain Application Using Hyperledger Fabric
Exploring an Enterprise Blockchain Application Using Hyperledger Fabric
Issuance claim
Setting up a Hyperledger Fabric environment
Writing chaincode
Configuring Hyperledger Fabric
Summary
17
Implementing Business Networks Using Hyperledger Composer
Implementing Business Networks Using Hyperledger Composer
Hyperledger Composer – a quick overview
Setting up a Hyperledger Composer environment
Analyzing business scenarios
Business network archive
Implementing the business transaction function
Summary
18
Blockchain Use Cases
Blockchain Use Cases
Blockchain use case examples
How to choose a proper use case
DApp use case – healthcare data sharing
Summary
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Index
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...

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