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Blockchain Smart Contracts with Solidity

Master the art of building secure and efficient decentralized applications by learning Blockchain Smart Contracts with Solidity from fundamental concepts to advanced deployment strategies. A CoddyKit learning path of 12 short courses and 48 interactive lessons, with a 24/7 AI tutor at your side.

Courses
12
Lessons
48
Interactive steps
566
Free to start
Course 1
Curriculum

12 courses in this path

Every course in the Blockchain Smart Contracts with Solidity path, in learning order. The first one is free.

1

A14 lessonsFree

Embark on your journey into the world of decentralized applications. This mini-course covers the core concepts of blockchain technology and introduces you to the basics of the Solidity programming la…

  1. 1What is Blockchain Technology?
  2. 2Ethereum Basics and EVM
  3. 3Your First Solidity Contract
  4. +1 more
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2

A24 lessonsPRO

Deepen your understanding of Solidity by exploring its fundamental language constructs. Learn how to declare variables, use control flow, and define functions to build more complex contract logic.

  1. 1Solidity Data Types and Variables
  2. 2Control Structures and Loops
  3. 3Functions and Visibility Modifiers
  4. +1 more
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3

A24 lessonsPRO

Transition from basic examples to a professional development workflow. This mini-course guides you through setting up a local development environment for building, testing, and deploying Solidity sma…

  1. 1Setting Up Hardhat or Truffle
  2. 2Compiling and Deploying Contracts
  3. 3Interacting with Deployed Contracts
  4. +1 more
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4

B14 lessonsPRO

Dive into the world of digital assets by learning to create your own fungible and non-fungible tokens. This course covers the widely adopted ERC-20 and ERC-721 token standards.

  1. 1ERC-20 Fungible Token Standard
  2. 2Implementing an ERC-20 Token
  3. 3ERC-721 Non-Fungible Tokens (NFTs)
  4. +1 more
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5

B24 lessonsPRO

Explore how smart contracts store and manage data on the blockchain. This mini-course covers different storage mechanisms, complex data structures, and how to emit events for off-chain consumption.

  1. 1State Variables and Storage Layout
  2. 2Mappings and Dynamic Arrays
  3. 3Events and Logging Data
  4. +1 more
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6

B24 lessonsPRO

Bridge the gap between the blockchain and the real world. This mini-course teaches you how to securely fetch and utilize off-chain data within your smart contracts using decentralized oracle networks.

  1. 1The Oracle Problem Explained
  2. 2Integrating Chainlink Oracles
  3. 3Handling Off-chain Data Retrieval
  4. +1 more
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7

B24 lessonsPRO

Master the art of rigorous testing and strategic deployment for production-ready smart contracts. This mini-course covers advanced testing frameworks, formal verification, and mainnet deployment cons…

  1. 1Advanced Testing with Foundry/Hardhat
  2. 2Formal Verification Basics
  3. 3Mainnet Deployment & Monitoring
  4. +1 more
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8

C14 lessonsPRO

Elevate your Solidity skills by diving into advanced language features and common design patterns. This mini-course covers inheritance, interfaces, libraries, and robust error handling techniques.

  1. 1Inheritance and Interfaces
  2. 2Libraries and Abstract Contracts
  3. 3Error Handling with Revert/Require
  4. +1 more
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9

C14 lessonsPRO

Security is paramount in blockchain development. This mini-course focuses on identifying common vulnerabilities and implementing best practices to write secure and resilient smart contracts.

  1. 1Common Vulnerabilities (Reentrancy, etc.)
  2. 2Access Control Patterns
  3. 3Secure Coding with SafeMath
  4. +1 more
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10

C14 lessonsPRO

Explore the foundational smart contract patterns behind the booming Decentralized Finance (DeFi) ecosystem. Learn about Automated Market Makers, lending protocols, and advanced financial primitives.

  1. 1AMMs and Liquidity Pools
  2. 2Lending and Borrowing Protocols
  3. 3Flash Loans and Arbitrage
  4. +1 more
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11

C14 lessonsPRO

Address the immutability challenge of smart contracts by learning about upgradeability patterns. This mini-course covers proxy patterns that allow you to modify contract logic post-deployment.

  1. 1Why Upgradeable Contracts?
  2. 2UUPS Proxy Pattern Implementation
  3. 3Diamond Standard (Multi-facet Proxies)
  4. +1 more
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12

C24 lessonsPRO

Explore advanced scaling solutions for Ethereum and how to enable communication between different blockchain networks. This mini-course covers Layer 2 technologies and cross-chain bridges.

  1. 1Introduction to L2 Scaling Solutions
  2. 2Optimistic vs. ZK Rollups
  3. 3Cross-Chain Communication & Bridges
  4. +1 more
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CoddyKit PRO

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Course Overview

Build Secure Decentralized Applications with Solidity

Blockchain smart contracts are self-executing programs deployed on Ethereum and compatible networks — once live, they run exactly as written with no central authority to intervene. This track focuses on Solidity, the dominant language for writing smart contracts, and covers everything from deploying your first contract to architecting production-grade DeFi protocols and cross-chain systems.

What You Will Learn

Write and deploy Solidity contracts from scratch, implement the major token standards (ERC-20, ERC-721, ERC-1155), manage contract state and storage efficiently, and connect on-chain logic to real-world data via oracles. You will also learn advanced testing and deployment pipelines, design patterns that prevent common vulnerabilities, and the mechanics of upgradeable and proxy contracts. Later courses cover DeFi patterns, flash loans, automated market makers, and Layer 2 solutions including optimistic rollups and cross-chain communication protocols.

The Learning Path

Twelve courses span A1 through C2. The track opens with blockchain fundamentals and Solidity syntax, then builds through token development, storage patterns, and oracle integration at B1–B2. The C1 tier covers advanced Solidity features, Smart Contract Security Best Practices, and Decentralized Finance (DeFi) Patterns. The track closes at C2 with Layer 2 Solutions and Cross-Chain Communication — the current frontier of production Ethereum development.

How It Works

Each course is split into short, hands-on lessons you complete in the built-in editor with real-time feedback and an AI tutor when you get stuck. You write actual Solidity code at every step, so by the end you have working contracts and the debugging instincts to maintain them.

Tools

Practice with AI, not just read

Supercharge your learning with AI-powered tools and features

AI ChatChat with AI tutorAsk Super QuestionGet expert-level answersPROCreate LessonAI-powered lesson builderPROStart Certification ExamEarn your certificatePROStart ChallengeTest your skills

How You'll Learn

  1. 01

    Interactive Lessons

    Hands-on coding exercises with real-time feedback

  2. 02

    AI Tutor

    Get instant help from our AI when you're stuck

  3. 03

    Built-in Editor

    Write and run code directly in your browser

  4. 04

    Certificate

    Earn a certificate when you complete the course

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FAQ

Frequently Asked Questions

Is the Blockchain Smart Contracts with Solidity course free?

Yes. You can start the Blockchain Smart Contracts with Solidity course for free and complete its interactive lessons at no cost. An optional PRO subscription unlocks advanced AI tools and a shareable certificate.

Do I need prior experience to learn Blockchain Smart Contracts with Solidity?

No. The course begins with the fundamentals and gradually moves to more advanced topics, so you can start even with no prior Blockchain Smart Contracts with Solidity experience.

How will I learn Blockchain Smart Contracts with Solidity on CoddyKit?

You learn by doing. Short interactive lessons pair a clear explanation with a hands-on coding exercise that runs in real time, and a 24/7 AI tutor gives personalized help whenever you get stuck.

Do I get a certificate for completing Blockchain Smart Contracts with Solidity?

Yes. PRO learners can take an exam and earn a shareable certificate of completion with a verifiable code for the Blockchain Smart Contracts with Solidity course.

Can I learn Blockchain Smart Contracts with Solidity on my phone?

Yes. CoddyKit is available on the web and as native iOS and Android apps, so you can learn Blockchain Smart Contracts with Solidity on any device and your progress syncs across them.

How much does CoddyKit PRO cost?

The first course of Blockchain Smart Contracts with Solidity is free. CoddyKit PRO unlocks every course: $5.90 per week, $7.90 per month, $29.90 per year, or $69.99 once for lifetime access with no renewals.

How long does it take to complete Blockchain Smart Contracts with Solidity?

Blockchain Smart Contracts with Solidity has 12 courses and 48 lessons. Most lessons take about 5–10 minutes, so the whole path is roughly 6 hours of hands-on practice, at your own pace.

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