Book Image

Blockchain By Example

By : Bellaj Badr, Richard Horrocks, Xun (Brian) Wu
Book Image

Blockchain By Example

By: Bellaj Badr, Richard Horrocks, Xun (Brian) Wu

Overview of this book

The Blockchain is a revolution promising a new world without middlemen. Technically, it is an immutable and tamper-proof distributed ledger of all transactions across a peer-to-peer network. With this book, you will get to grips with the blockchain ecosystem to build real-world projects. This book will walk you through the process of building multiple blockchain projects with different complexity levels and hurdles. Each project will teach you just enough about the field's leading technologies, Bitcoin, Ethereum, Quorum, and Hyperledger in order to be productive from the outset. As you make your way through the chapters, you will cover the major challenges that are associated with blockchain ecosystems such as scalability, integration, and distributed file management. In the concluding chapters, you’ll learn to build blockchain projects for business, run your ICO, and even create your own cryptocurrency. Blockchain by Example also covers a range of projects such as Bitcoin payment systems, supply chains on Hyperledger, and developing a Tontine Bank Every is using Ethereum. By the end of this book, you will not only be able to tackle common issues in the blockchain ecosystem, but also design and build reliable and scalable distributed systems.
Table of Contents (13 chapters)

Contract security

Our two contracts are now complete, and we'll shortly describe how to deploy them to a network. Once they are deployed to the blockchain, we won't be able to change them: they will be immutable. This immutability means that it's important to ensure the code is correct the first time, as any bugs found after deployment will be difficult to fix.

To this end, when developing smart contracts, it's important to follow best practices. Here are some important considerations to keep in mind when writing smart contracts:

  • Prepare for failure and bugs.
  • Deploy carefully.
  • Keep contracts as simple as possible.
  • Ensure your tools and components are up to date.
  • Understand how the blockchain works.

Known attack vectors

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