Book Image

Blockchain Developer's Guide

By : Brenn Hill, Samanyu Chopra, Paul Valencourt, Narayan Prusty
Book Image

Blockchain Developer's Guide

By: Brenn Hill, Samanyu Chopra, Paul Valencourt, Narayan Prusty

Overview of this book

Blockchain applications provide a single-shared ledger to eliminate trust issues involving multiple stakeholders. It is the main technical innovation of Bitcoin, where it serves as the public ledger for Bitcoin transactions. Blockchain Developer's Guide takes you through the electrifying world of blockchain technology. It begins with the basic design of a blockchain and elaborates concepts, such as Initial Coin Offerings (ICOs), tokens, smart contracts, and other related terminologies. You will then explore the components of Ethereum, such as Ether tokens, transactions, and smart contracts that you need to build simple DApps. Blockchain Developer's Guide also explains why you must specifically use Solidity for Ethereum-based projects and lets you explore different blockchains with easy-to-follow examples. You will learn a wide range of concepts - beginning with cryptography in cryptocurrencies and including ether security, mining, and smart contracts. You will learn how to use web sockets and various API services for Ethereum. By the end of this Learning Path, you will be able to build efficient decentralized applications. This Learning Path includes content from the following Packt products: • Blockchain Quick Reference by Brenn Hill, Samanyu Chopra, Paul Valencourt • Building Blockchain Projects by Narayan Prusty
Table of Contents (37 chapters)
Title Page
About Packt

Distributed systems

A distributed system is one in which the application and its architecture are distributed over a large number of machines and preferably physical locations. More simply, a distributed system is one where the goal of the system is spread out across multiple sub-systems in different locations. This means that multiple computers in multiple locations must coordinate to achieve the goals of the overall system or application. This is different than monolithic applications, where everything is bundled together.

Let's take the example of a simple web application. A basic web application would run with processing, storage, and everything else running on a single web server. The code tends to run as a monolith—everything bundled together. When a user connects to the web application, it accepts the HTTP request, uses code to process the request, accesses a database, and then returns a result.

The advantage is that this is very easy to define and design. The disadvantage is that such...