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Solidity Programming Essentials

Solidity Programming Essentials

By : Ritesh Modi
3.6 (10)
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Solidity Programming Essentials

Solidity Programming Essentials

3.6 (10)
By: Ritesh Modi

Overview of this book

Solidity is a contract-oriented language whose syntax is highly influenced by JavaScript, and is designed to compile code for the Ethereum Virtual Machine. Solidity Programming Essentials will be your guide to understanding Solidity programming to build smart contracts for Ethereum and blockchain from ground-up. We begin with a brief run-through of blockchain, Ethereum, and their most important concepts or components. You will learn how to install all the necessary tools to write, test, and debug Solidity contracts on Ethereum. Then, you will explore the layout of a Solidity source file and work with the different data types. The next set of recipes will help you work with operators, control structures, and data structures while building your smart contracts. We take you through function calls, return types, function modifers, and recipes in object-oriented programming with Solidity. Learn all you can on event logging and exception handling, as well as testing and debugging smart contracts. By the end of this book, you will be able to write, deploy, and test smart contracts in Ethereum. This book will bring forth the essence of writing contracts using Solidity and also help you develop Solidity skills in no time.
Table of Contents (17 chapters)
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Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
2
Index

Error handling


Errors are often inadvertently introduced while writing contracts, so writing robust contracts is a good practice and should be followed. Errors are a fact of life in the programming world and writing error-free contracts is a desired skill. Errors can occur at design time or runtime. Solidity is compiled into bytecode and there are design-level checks for any syntax errors at design time while compiling. Runtime errors, however, are more difficult to catch and generally occur while executing contracts. It is important to test the contract for possible runtime errors, but it is more important to write defensive and robust contracts that take care of both design time and runtime errors.

Examples of runtime errors are out-of-gas errors, divide by zero errors, data type overflow errors, array-out-of-index errors, and so on.

Until version 4.10 of Solidity there was a single throw statement available for error handling. Developers had to write multiple if...else statements to check...

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