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


Ether is the main cryptocurrency associated with the Ethereum blockchain; each of the contract accounts can create their own currency, but Ether is used within the Ethereum blockchain to pay for the execution of the contracts on the EVM. Ether is used for purchasing gas, and the smallest unit of Ether is used as the unit of gas.

Since Wei is the smallest unit of Wei, here is a table, listing the denominations and the name commonly used for them, along with the associated value:

Procuring ether

There are various ways by which Ether can be procured for trading, building smart contracts, or decentralized applications:

  • Mining of Ethers, by either joining a mining pool or doing solo mining
  • Trade using a crypto exchange platform, and exchange from any other cryptocurrency
  • Buying Ether from any fiat currency—there are various exchanges that allow the purchasing of Ether from fiat currency


Due to its vast community support and major active development, Ether has always been a preferred investment...