Book Image

Blockchain for Enterprise

By : Narayan Prusty
Book Image

Blockchain for Enterprise

By: Narayan Prusty

Overview of this book

The increasing growth in blockchain use is enormous, and it is changing the way business is done. Many leading organizations are already exploring the potential of blockchain. With this book, you will learn to build end-to-end enterprise-level decentralized applications and scale them across your organization to meet your company's needs. This book will help you understand what DApps are and how the blockchain ecosystem works, via real-world examples. This extensive end-to-end book covers every blockchain aspect for business and for developers. You will master process flows and incorporate them into your own enterprise. You will learn how to use J.P. Morgan’s Quorum to build blockchain-based applications. You will also learn how to write applications that can help communicate enterprise blockchain solutions. You will learn how to write smart contracts that run without censorship and third-party interference. Once you've grasped what a blockchain is and have learned about Quorum, you will jump into building real-world practical blockchain applications for sectors such as payment and money transfer, healthcare, cloud computing, supply chain management, and much more.
Table of Contents (14 chapters)
Title Page
Packt Upsell

Solidity source files

You can identify a Solidity source file by the .sol extension. It has various versions, as programming languages usually do. The latest version at the time of writing this book is0.4.17.

In the source file, you can use the pragma Solidity directive to mention the compiler version for which the code is written. For example:

pragma Solidity ^0.4.17;

It is important to note that the source file will not compile with compiler versions earlier than 0.4.17 and later than 0.5.0 (this second condition is added using ^). Compiler versions between 0.4.17 and 0.5.0 are most likely to include bug fixes and less likely to break anything.

We can specify more complex rules for the compiler version; the expression follows those used by npm.