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


This is the primary part of the Bitcoin system. Transactions are not encrypted, since Bitcoin is an open ledger. Any transaction can be publicly seen in the blockchain using any online blockchain explorer. Since addresses are encrypted and encouraged to be unique for every transaction, tracing a user becomes difficult.

Blocks in Bitcoin are made up of transactions that are viewed in a blockchain explorer; each block has the recent transactions that have happened. Every new block goes at the top of the blockchain. Each block has a height number, and the height of the next block is one greater than that of the previous block. The consensus process is commonly known as confirmations on the blockchain explorer.


There are various types of scripts available to manage the value transfer from one wallet to another. Some of the standard types of transactions are discussed here for a clear understanding of address and how transactions differ from one another.

Pay-to-Public-Key Hash