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
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.
Table of Contents (25 chapters)
Title Page
Copyright
About Packt
Contributors
Preface
Index

Discussing events from the perspective of designing a business network using Composer


We've seen so far that the vocabulary of business networks contains a compact set of inextricably linked concepts—participants, assets, and transactions. Though small in number, these concepts are very expressive—they contain big ideas, with lots of aspects to them, which support and reinforce each other.

It's not that there's something missing, but by adding one extra concept, we're going to significantly increase the descriptive and design power of this vocabulary. This final concept is event—the last ingredient in the mix! The good news is that you've probably heard the term before, and many of the ideas that it supports are quite obvious. But make no mistake, events are a hugely powerful concept, and worth a little time to master—your investment in this topic will be handsomely rewarded.

A universal concept

We think of an event as denoting the occurrence or happening of a particular fact. For example,...