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Solidity Programming Essentials

You're reading from Solidity Programming Essentials

Product type Book

Published in Apr 2018

Publisher Packt

ISBN-13 9781788831383

Pages 222 pages

Edition 1st Edition

Languages

Concepts

Programming Language

Table of Contents (17) Chapters

Title Page

Copyright and Credits

Packt Upsell

Contributors

Preface

1. Introduction to Blockchain, Ethereum, and Smart Contracts

2. Installing Ethereum and Solidity

3. Introducing Solidity

4. Global Variables and Functions

5. Expressions and Control Structures

6. Writing Smart Contracts

7. Functions, Modifiers, and Fallbacks

8. Exceptions, Events, and Logging

9. Truffle Basics and Unit Testing

10. Debugging Contracts

1. Other Books You May Enjoy

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Index

The web3 JavaScript library

The web3 library is an open source JavaScript library that can be used to connect to Ethereum nodes from the same or a remote computer. It allows IPC as well as RPC to connect to Ethereum nodes. web3 is a client-side library and can be used alongside a web page and query and can submit transactions to Ethereum nodes. It can be installed using the node package manager as a node module like the Solidity compiler. At the time of writing, the latest version of web3 is broken and does not install appropriately because of the missing BigNumber.js file. However, previous stable versions can be used for connecting web applications to backend Ethereum nodes. Let's take a look at the following steps to install the web3 JavaScript library:

The command used to install web3 is as follows:

npm install web3@0.19

The preceding command generates the following output:

After web3 is installed, it can be used using Node.js. From Command Prompt, enter the node workspace by executing the...

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