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


Libraries are similar to contracts, but they are deployed just once at a specific address and their code is reused by various contracts. This means that if library functions are called, their code is executed in the context of the calling contract; So, this points to the calling contract, and specifically, allows access to the storage from the calling contract. As a library is an isolated piece of source code, it can only access state variables of the calling contract if they are explicitly supplied (it would have no way to name them otherwise).

Libraries can contain structs and enums, but they cannot have state variables. They don't support inheritance and they cannot receive Ethereum. 

Once a Solidity library is deployed to the blockchain, it can be used by anyone, assuming one knows its address and has the source code (with only prototypes or complete implementation). The source code is required by the Solidity compiler so it can ensure that the methods being accessed actually...