Last Updated on 25. March 2025 by Mario Oettler

Solidity Coding – Beginners to Intermediate

Target Group

This course aims at software engineers who want to learn how to code Ethereum smart contracts with Solidity. .

Learning objectives

In this course, you will learn how code Ethereum smart contracts in Solidity. You will learn the most important language features of Solidity like variables, data types, abstract contracts, interfaces, data locations (storage, memory, stack, call data). Besides that, you learn common coding patterns of smart contracts. Quickly, you will be able to write your own smart contract and recognize important security relevant points.

free of charge

no

no

12h

PC, Browser

Mario Oettler

bcam@hs-mittweida.de

Course Content

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Solidity 1 7 Topics

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Development Stack and Architecture

Our First Smart Contract with Solidity

Deploying a Smart Contract to the Sepolia Testnet

Extending the Smart Contract

Solidity Assignment 1

General Philosophy of Programming Smart Contracts

Survey Lesson 1 Solidity 1

Solidity 2 – Sending Ether, Receiving Ether, Emitting Events 6 Topics

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Sending Ether: send vs. transfer vs. call

Fallback Function and Receive Ether Function

Solidity Assignment 2

Solidity Assignment 3

Events in Solidity

Survey Lesson 2 Sending Ether, Receiving Ether, Emitting Events

Solidity 3 – Control Structures 6 Topics

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Ternary Operator in Solidity

While and do while

Break and Continue

Survey Lesson 3 Control Structures

Solidity 4 – Error Handling and Modifiers 6 Topics

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Reacting to Unwanted Behavior – assert, require, revert

Custom Errors in Solidity

Overflow, Underflow, Division by Zero

Function Modfiers

Assignment 4 – modifier, error handling

Survey Lesson 4 Error Handling and Modifiers

Solidity 5 – Calling other Contracts, Visibility, State Access 9 Topics

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Visibility – public, private, external, internal

Pure and view Functions

tx.origin and msg.sender

Survey Lesson 5 Calling other Contracts, Visibility, State Access

Solidity 6 – Exception Handling 2 Topics

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Exception Handling With Try and Catch

Survey Lesson 6 Exception Handling

Solidity 7 – Data Types 8 Topics

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Value Types in Solidity

Assignment Mappings

Arrays in Solidity

Exercice 1 Array and Loop

Assignment Array and Loop

Survey Lesson 7 Data Types

Solidity 8 – Data Location 2 Topics

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Data Locations in Solidity EVM

Survey Lesson 8 Data Location

Solidity 9 – Creating new Contracts and Inheritance 5 Topics

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Create a Contract with New

Create a Contract with Create2

Inheritance of Contracts

Assignment Inheritance and Overriding Functions

Survey Lesson 9 Creating new Contracts and Inheritance

Solidity 10 – Abstract Contracts and Interfaces, 3 Topics

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Abstract Contracts in Solidity

Interfaces of Smart Contracts in Solidity

Survey Lesson 10 Abstract Contracts and Interfaces

Solidity 11 – Coding Patterns 7 Topics

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Checks, Effects, Interactions

Updateable Contracts

Emergency Break

Survey Lesson 11 Coding Patterns

Solidity 12 – Reading The Storage 3 Topics

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The Storage Layout

Reading the Ethereum Storage

Survey Lesson 12 Reading The Storage

Solidity 13 – Useful Techniques 5 Topics

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Compare Strings in Solidity

Concatenate Strings in Solidity

Get the First Character of a String in Solidity

Balance of Contract in Solidity

Passing Function Pointers in Solidity Function Calls

Solidity 14 – ERC-20 Token 3 Topics

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Introduction to ERC-20 Token Standard

Create Your Own ERC-20 Token

Problems with ERC-20

Solidity 15 – Solidity Bit Operations

Solidity 16 – NatSpec

Solidity 17 – Gas Saving Tweaks 13 Topics

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Gas Costs in Ethereum

Packing Variables by EVM

Packing Variables Manually

Packing Structs

Use Constants Instead of Variables When Possible

Use Mappings Over Arrays in Some Cases

Using Storage Pointers Instead of Memory (with caution)

Choose Wisely Between Modifiers and Internal Functions

Calldata vs Memory

Ignore Safe Math (unchecked) – But Know What You Do!

Avoid zero to non-zero storage writes

Sticking to uint256

Survey Course Solidity Coding – Beginners to Intermediate

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