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Hyperledger Cookbook
Hyperledger Cookbook

Hyperledger Cookbook: Over 40 recipes implementing the latest Hyperledger blockchain frameworks and tools

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Profile Icon Xun (Brian) Wu Profile Icon Chuangfeng Zhang Profile Icon Zhibin (Andrew) Zhang
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€29.99
Full star icon Full star icon Full star icon Full star icon Full star icon 5 (2 Ratings)
Paperback Apr 2019 310 pages 1st Edition
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Arrow left icon
Profile Icon Xun (Brian) Wu Profile Icon Chuangfeng Zhang Profile Icon Zhibin (Andrew) Zhang
Arrow right icon
€29.99
Full star icon Full star icon Full star icon Full star icon Full star icon 5 (2 Ratings)
Paperback Apr 2019 310 pages 1st Edition
eBook
€8.99 €23.99
Paperback
€29.99
Subscription
Free Trial
Renews at €18.99p/m
eBook
€8.99 €23.99
Paperback
€29.99
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Renews at €18.99p/m

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Hyperledger Cookbook

Implementing Hyperledger Fabric

In the previous chapter, we learned about how to set up and configure Hyperledger Fabric. We explored its key components, including channels, Membership Service Providers (MSPs), the ordering service, and Fabric Certificate Authority (CA).

In this chapter, we are going to build a simple device asset management DApp. We will exploit this example by writing chaincode implemented by various programming languages and we'll also build, test, and deploy our DApp.

First, we will look at inventory asset management, and then the rest of the chapter will be divided into the following recipes:

  • Writing chaincode as a smart contract
  • Compiling and deploying Fabric chaincode
  • Running and testing the smart contract
  • Developing an application with Hyperledger Fabric through the SDK

Inventory asset management

Blockchain technology is considered to be a game-changer for building an immutable, decentralized, trustless, and peer-to-peer ledger for business logic. Records in the blockchain are linked using cryptography. Each block contains a block timestamp, transaction data, and the previous block's cryptographic hash information.

IT asset management is an important part of an organization's strategy. It usually involves incorporating detailed IT assets and inventory information for business practices, such as hardware purchases and redistribution. Typical business practices include the request and approval process, procurement management, life cycle management, and so on.

Today, there are many participants in an asset's life cycle—from the manufacturer, the transporter, the IT service department, all the way to the end user—with...

Writing chaincode as a smart contract

Chaincode in Hyperledger Fabric is similar to smart contracts. It is a program that implements the business logic and is run on top of blockchain. The application can interact with the blockchain by invoking chaincode to manage the ledger state and keep the transaction record in the ledger. This chaincode needs to be installed on each endorsing peer node that runs in a secured Docker container. The Hyperledger Fabric chaincode can be programmed in Go, Node.js, and Java.

Every chaincode program must implement the Chaincode interface. In this section, we will explore chaincode implementation using Go.

Getting ready

In Chapter 1, Working with Hyperledger Fabric, we set up our Hyperledger...

Compiling and deploying Fabric chaincode

We have now successfully written our asset management chaincode using the Go language. It is now time to build and deploy our assetmgr chaincode to Hyperledger Fabric.

Getting ready

Let's first get the fabric library in our environment. Navigate to the assetmgr directory, run the get chaincode library command, and then start build:

cd $GOPATH/src/assetmgr
go get -u github.com/hyperledger/fabric/core/chaincode/shim
go build

This will load the chaincode library and compile the Go code. Next, we will deploy the chaincode using the dev mode. Normally, we need to define our own channel, peer, and configuration Docker container to run our chaincode. Hyperledger, however, provides a sample...

Running and testing the smart contract

We have opened two Terminals so far and deployed the chaincode to the peer node. It is time to install and test our chaincode function.

How to do it...

Open the third container to issue the cli command and test our smart contract. In this Terminal, we will start the cli container and issue the cli command to interact with the chaincode container. Launch an example cli container as follows:

docker exec -it cli bash

Installing the assermgr chaincode

Install the assermgr chaincode through the cli container by running the following command...

Developing an application with Hyperledger Fabric through the SDK

In the previous recipes, we used the fabric-samples prebuilt devmode environment to deploy and test our asset manager chaincode using chaincode-docker-devmode. In this recipe, we will write UI code to interact with chaincode from blockchain. We will also build a Fabric CA container to improve the security of our application. Fortunately, fabric-sample provides the basic-network template, which can help us set up a basic Fabric network.

How to do it...

We first need to write a Fabric script to start the Fabric network and deploy the chaincode in this network. Using the cli container, we then install and instantiate the chaincode. The authorized client with the...

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Key benefits

  • Plan, design, and create a full-fledged private decentralized application using Hyperledger services
  • Master the ins and outs of the Hyperledger network using real-world examples
  • Packed with problem-solution-based recipes to tackle pain areas in the blockchain development cycle

Description

Hyperledger is an open-source project and creates private blockchain applications for a range of domains. This book will be your desk reference as you explore common and not-so-common challenges faced while building blockchain networks using Hyperledger services. We'll work through all Hyperledger platform modules to understand their services and features and build end-to-end blockchain applications using various frameworks and tools supported by Hyperledger. This book's independent, recipe-based approach (packed with real-world examples) will familiarize you with the blockchain development cycle. From modeling a business network to integrating with various tools, you will cover it all. We'll cover common and not-so-common challenges faced in the blockchain life cycle. Later, we'll delve into how we can interact with the Hyperledger Fabric blockchain, covering all the principles you need to master, such as chaincode, smart contracts, and much more. We'll also address the scalability and security issues currently faced in blockchain development. By the end of this book, you will be able to implement each recipe to plan, design, and create a full-fledged, private, decentralized application to meet organizational needs.

Who is this book for?

This book is for blockchain developers who want to understand how they can apply Hyperledger services in their day-to-day projects. This book uses a recipe-based approach to help you use Hyperledger to build powerful, decentralized autonomous applications. We assume the reader has a basic knowledge of the Blockchain technology and cryptography concepts

What you will learn

  • Create the most popular permissioned blockchain network with Fabric and Composer
  • Build permissioned and permission-less blockchains using Sawtooth
  • Utilize built-in Iroha asset/account management with role-based permissions
  • Implement and run Ethereum smart contracts with Burrow
  • Get to grips with security and scalability in Hyperledger
  • Explore and view blockchain data using Hyperledger Explorer
  • Produce reports containing performance indicators and benchmarks using Caliper
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Table of Contents

11 Chapters
Working with Hyperledger Fabric Chevron down icon Chevron up icon
Implementing Hyperledger Fabric Chevron down icon Chevron up icon
Modeling a Business Network Using Hyperledger Composer Chevron down icon Chevron up icon
Integrating Hyperledger Fabric with Explorer Chevron down icon Chevron up icon
Working with Hyperledger Sawtooth Chevron down icon Chevron up icon
Operating an Ethereum Smart Contract with Hyperledger Burrow Chevron down icon Chevron up icon
Working with Hyperledger Iroha Chevron down icon Chevron up icon
Exploring the CLI with Hyperledger Indy Chevron down icon Chevron up icon
Hyperledger Blockchain Scalability and Security Chevron down icon Chevron up icon
Hyperledger Blockchain Ecosystem Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Full star icon 5
(2 Ratings)
5 star 100%
4 star 0%
3 star 0%
2 star 0%
1 star 0%
Matt Zand Aug 11, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This book is very hands-on. It covers all projects and tools under Hyperledger such as Sawtooth, Burrow, Seth and Indy. It is a must-have resource for all Hyperledger consultants and instructors. I read this book few times and I highly recommend it to all Hyperledger developers.
Amazon Verified review Amazon
Naz Aug 03, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This book give an excellence overview and lots example for Hyperledger family, I really recommend , came in a week , fast shipping , worth the price ✔✔✔
Amazon Verified review Amazon
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