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Mastering Blockchain Programming with Solidity

By : Chittoda

2.9 (8)

Mastering Blockchain Programming with Solidity

2.9 (8)

By: Chittoda

Overview of this book

Solidity is among the most popular and contract-oriented programming languages used for writing decentralized applications (DApps) on Ethereum blockchain. If you’re looking to perfect your skills in writing professional-grade smart contracts using Solidity, this book can help. You will get started with a detailed introduction to blockchain, smart contracts, and Ethereum, while also gaining useful insights into the Solidity programming language. A dedicated section will then take you through the different Ethereum Request for Comments (ERC) standards, including ERC-20, ERC-223, and ERC-721, and demonstrate how you can choose among these standards while writing smart contracts. As you approach later chapters, you will cover the different smart contracts available for use in libraries such as OpenZeppelin. You’ll also learn to use different open source tools to test, review and improve the quality of your code and make it production-ready. Toward the end of this book, you’ll get to grips with techniques such as adding security to smart contracts, and gain insights into various security considerations. By the end of this book, you will have the skills you need to write secure, production-ready smart contracts in Solidity from scratch for decentralized applications on Ethereum blockchain.

Preface

Preface

Who this book is for

What this book covers

To get the most out of this book

Get in touch

Free Chapter

Section 1: Getting Started with Blockchain, Ethereum, and Solidity

Section 1: Getting Started with Blockchain, Ethereum, and Solidity

Introduction to Blockchain

Introduction to Blockchain

Understanding blockchain

Introduction to Ethereum

Smart contracts

Summary

Questions

Getting Started with Solidity

Getting Started with Solidity

Introduction to the Solidity language

Solidity data types

Assigning variables with units

Global special variables and functions

Topics for self-study

Summary

Questions

Further reading

Control Structures and Contracts

Control Structures and Contracts

Understanding Solidity control structures

Solidity contracts

Understanding types of Solidity functions

Using emit and events for event logging

Inheriting contracts

Creating abstract contracts

Creating interfaces

Creating custom reusable libraries

Summary

Questions

Section 2: Deep Dive into Development Tools

Section 2: Deep Dive into Development Tools

Learning MetaMask and Remix

Learning MetaMask and Remix

Technical requirements

Using the MetaMask plugin

Using the Remix Solidity IDE

Using the blockchain explorer at etherscan.io

Ethereum wallet software

Using myetherwallet.com

Summary

Questions

Using Ganache and the Truffle Framework

Using Ganache and the Truffle Framework

Technical requirements

Local blockchain with Ganache

Understanding Truffle framework

Summary

Questions

Taking Advantage of Code Quality Tools

Taking Advantage of Code Quality Tools

Technical requirements

Using the surya tool

Understanding Solidity linters

The solidity-coverage tool

Summary

Questions

Section 3: Mastering ERC Standards and Libraries

Section 3: Mastering ERC Standards and Libraries

ERC20 Token Standard

ERC20 Token Standard

Technical requirements

Overview of the ERC20 token standard

ERC20 standard API

ERC20 implementation

Events

Optional functions

Advanced functions

Summary

Questions

ERC721 Non-Fungible Token Standard

ERC721 Non-Fungible Token Standard

Technical requirements

Overview of the ERC721 NFT standard

The ERC721 NFT standard API interface

Understanding the ERC721 implementation

Events

The ERC721TokenReceiver interface

The ERC721Metadata interface

The ERC721 enumerable

The ERC721 full implementation

Summary

Questions

Deep Dive into the OpenZeppelin Library

Deep Dive into the OpenZeppelin Library

Technical requirements

The OpenZeppelin project

Contract ownership

Roles library

Life cycle contracts

The ERC20 token standard library

Math-related libraries

Crowdsale

Utility contracts

Summary

Questions

Using Multisig Wallets

Using Multisig Wallets

Technical requirements

Understanding multisig wallets

Benefits of using multisig wallets

Precautions when using multisig wallets

Learning ConsenSys multisig implementation

Setting up your own multisig wallet

Sending ETH from a multisig contract

Controlling contracts with multisig

Summary

Questions

Upgradable Contracts Using ZeppelinOS

Upgradable Contracts Using ZeppelinOS

Technical requirements

Understanding upgradable contracts

Introduction to ZeppelinOS

Creating a ZeppelinOS project

ZeppelinOS commands

Precautions while using ZeppelinOS

Summary

Questions

Building Your Own Token

Building Your Own Token

Technical requirements

Features of our token

Contract architecture design

Setting up the Truffle project

Creating Solidity contracts

Writing a migration script

Writing test cases

Deploying contracts on testnet

Summary

Questions

Section 4: Design Patterns and Best Practices

Section 4: Design Patterns and Best Practices

Solidity Design Patterns

Solidity Design Patterns

Security patterns

Creational patterns

Behavioral patterns

Gas economic patterns

Life cycle patterns

Summary

Questions

Tips, Tricks, and Security Best Practices

Tips, Tricks, and Security Best Practices

Technical requirements

Smart contracts best practices

Known attack patterns

Security analysis tools

Summary

Questions

Assessments

Assessments

Chapter 1

Chapter 2

Chapter 3

Chapter 4

Chapter 5

Chapter 6

Chapter 7

Chapter 8

Chapter 9

Chapter 10

Chapter 11

Chapter 12

Chapter 13

Chapter 14

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Sending ETH from a multisig contract

Now, let's learn how to send ETH from a multisig contract to any public EOA/contract address. We will replicate the example that we discussed in the first section of this chapter, Understanding multisig wallets.

We have deployed a multisig contract before. Initially, the multisig has zero ETH balance in it. First, we need to deposit some ETH into the multisig contract. To do this, click on the Deposit button, as shown in the following screenshot and follow the instructions to send ETH:

The multisig contract, its address, and its current ETH balance

You can also send ETH directly to your multisig contract address. Once you have deposited/sent ETH to the multisig contract, you will be able to see the available ETH balance, as shown in the preceding screenshot. Here, we have deposited 2.00 ETH into the multisig contract.

Now that we...

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