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Ethereum Cookbook

You're reading from Ethereum Cookbook Over 100 recipes covering Ethereum-based tokens, games, wallets, smart contracts, protocols, and Dapps

Product type Paperback

Published in Aug 2018

Publisher Packt

ISBN-13 9781789133998

Length 404 pages

Edition 1st Edition

Languages

Solidity

Tools

Ethereum

Concepts

Cryptocurrency

Author (1):

Manoj P R

View More author details

Table of Contents (18) Chapters

Title Page

Copyright and Credits

Packt Upsell

Contributors

Preface

1. Getting Started FREE CHAPTER

2. Smart Contract Development

3. Interacting with the Contract

4. The Truffle Suite

5. Tokens and ICOs

6. Games and DAOs

7. Advanced Solidity

8. Smart Contract Security

9. Design Decisions

10. Other Protocols and Applications

11. Miscellaneous

1. Other Books You May Enjoy

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Index

Generating random numbers in Solidity

Some applications might need a random number generator (RNG) to perform specific tasks. There are many use cases where randomness is an essential part. For example, a decentralized lottery requires a random number to select the winner. Randomness can also be used to provide suggestions to the users of the application.

Generating a random number can be tricky in a decentralized system such as Ethereum for various reasons. Such functionality has to be achieved through design workarounds. In this chapter, you will learn how to build an RNG that can be used in your DApp.

Getting ready

It is required to have at least a basic knowledge of writing smart contracts and building DApps using Web3JS. Understanding the implementation of a basic DApp is essential to get more out of this recipe.

For those who are new to this, it is recommended to read through the first three chapters of this book.

How to do it…

Programs in Ethereum have to be deterministic since they run...

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Authors (1)

Manoj P R

Manoj P R

Manoj P R is a tech-savvy person who has been working with distributed ledger technology for more than three years. His passion for the latest technology trends in the market has made him an avid learner and contributor in this space. He specializes in Ethereum, JavaScript, and Go. A self-taught programmer, Manoj started his programming career as a freelancer during his early academic life. He has developed many scalable enterprise blockchain solutions for various clients across the globe. He is currently associated with Conduent Labs as a Blockchain SME. He loves solving real-life problems using technology and is a lively contributor towards open source projects. Apart from work, Manoj likes traveling and writing.

See other products by Manoj P R

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