Refactor liquidations

This lesson focuses on refining the DeFi protocol by refactoring the 'redeemCollateral()' function. It covers the importance of testing and refactoring for building a reliable DeFi protocol, enhancing security, and improving functionality.

Solidity Developer

Advanced Foundry
1. DeFi introduction
Explore the fundamentals of decentralized finance (DeFi) including key concepts, protocols, and the significance of DeFi in the financial sector. Duration: 10min
2. Project code walkthrough
Delve into the detailed walkthrough of DeFi codebase including analysis of key files and their functionalities in the DeFi environment. Duration: 4min
3. Introduction to stablecoins
Gain insights into stablecoins, their types, significance in DeFi, and the roles they play in maintaining economic stability in digital finance. Duration: 29min
4. Quiz: Intro to Stablecoins Quiz
Questions: 6
5. DecentralizedStableCoin.sol
Understand the creation and management of decentralized stablecoins, focusing on their development, operational mechanics, and impact on DeFi. Duration: 15min
6. Project setup - DSCEngine
Learn about setting up the DSCEngine project in DeFi, including configuration, development practices, and key components of the engine. Duration: 11min
7. Create the deposit collateral function
This lesson covers the process of creating a function to deposit collateral in a DeFi project, highlighting key aspects of its implementation. Duration: 19min
8. Creating the mint function
Explore the intricacies of creating a mint function in DeFi, focusing on its role, functionality, and integration within the DeFi ecosystem. Duration: 17min
9. Creating and retrieving the health factor
Delve into the concept of 'Health Factor' in DeFi protocols, its calculation, significance, and impact on the stability and risk management of DeFi projects. Duration: 7min
10. Finish the mint function
Complete the development of the mint function in DeFi, focusing on optimizing functionality, ensuring security, and integrating with the overall system. Duration: 2min
11. Quiz: Stablecoins Mid Section Recap Quiz
Questions: 5
12. Creating the deployment script
Learn the process of creating a deploy script for DeFi projects, including setup, configuration, and deploying smart contracts to the blockchain. Duration: 15min
13. Test the DSCEngine smart contract
Understand the process and importance of testing DSCEngine smart contracts in DeFi, including methodologies, best practices, and common test scenarios. Duration: 12min
14. Create the depositAndMint function
This lesson focuses on developing a combined deposit and mint function in DeFi, emphasizing its efficiency and integration into the DeFi framework. Duration: 3min
15. Create the redeem collateral function
Explore the development of a function for redeeming collateral in DeFi, including its significance, operational process, and impact on users. Duration: 12min
16. Setup liquidations
Dive into setting up liquidations in DeFi protocols, understanding their mechanics, importance, and their role in maintaining financial stability. Duration: 17min
17. Refactor liquidations
This lesson focuses on refining the DeFi protocol by refactoring the 'redeemCollateral()' function. It covers the importance of testing and refactoring for building a reliable DeFi protocol, enhancing security, and improving functionality. Duration: 13min
18. DSCEngine advanced testing
This lesson dives into advanced testing techniques for Ethereum smart contracts using Foundry. It emphasizes the significance of testing for function initialization and demonstrates constructing and executing thorough test cases. Duration: 17min
19. Create the fuzz tests handler pt.1
Part 1 of this lesson introduces the concept of fuzz testing in Foundry, focusing on creating detailed invariant tests for smart contracts. It guides through setting up the testing environment and structuring invariants and handlers. Duration: 14min
20. Create the fuzz tests handler pt.2
In Part 2, the focus shifts to crafting optimized handlers for valid function calls in smart contracts. The lesson covers the groundwork of creating function handlers and improving test efficiency through valid and efficient function calls. Duration: 20min
21. Quiz: Stablecoins mid section recap pt.2 Quiz
Questions: 8
22. Defi Handler Deposit Collateral
We set the revert on fail condition for this lesson. Duration: 18min
23. Create the collateral redeem handler
This lesson delves into the mechanisms of handling collateral in blockchain transactions. It focuses on the implementation and testing of functions for depositing and redeeming collateral, emphasizing the importance of validity checks. Duration: 6min
24. Create the mint handler
Lesson 21 guides through testing the 'mintDsc()' function in DSCEngine. It involves creating a handler function to ensure safe minting of DSC, considering the user's health factor and the system's overall stability. Duration: 6min
25. Debugging the fuzz tests handler
This lesson explores debugging strategies for smart contracts, particularly focusing on the use of 'ghost variables' to track function calls. It provides insights into handling errors and refining the testing process for better outcomes. Duration: 9min
26. Create the price feed handler
The lesson focuses on integrating price feed updates in smart contract handlers. It covers the creation of functions for updating collateral prices and emphasizes the importance of handling price fluctuations to maintain protocol integrity. Duration: 8min
27. Manage your oracles connections
This lesson addresses the implementation and management of Chainlink Price Feeds in DSCEngine. It includes creating a library for ensuring price feed accuracy and discusses the implications of stale prices on the protocol's functionality. Duration: 9min
28. Preparing your protocol for an audit
This lesson provides a comprehensive guide on preparing smart contracts for audits. It emphasizes the importance of audits, offers a readiness checklist, and introduces the concept Duration: 2min
29. Section recap
This lesson serves as a comprehensive recap of the advanced project covered in the Web 3.0 course. It celebrates the milestones achieved in exploring varied concepts such as Decentralized Finance (DeFi), advanced fuzzing techniques, digital security, and working with Oracle Duration: 4min
30. Quiz: Stablecoins Section Recap Quiz
Questions: 5
31. Bonus: introduction to Lens Protocol
This bonus lesson introduces the Lens Protocol, a decentralized social platform by the Aave team, presented by Nader Dabit, the head of DevRel for Lens Protocol. Lens Protocol empowers developers to build social media applications in the decentralized space, leveraging Web3 features such as native payments, ownership, and composability. Duration: 3min

Course Overview

About the course

What you'll learn

Advanced smart contract development

How to develop a stablecoin

How to develop a DeFi protocol

How to develop a DAO

Advanced smart contracts testing

Fuzz testing

Manual verification

Course Description

Who is this course for?

  • Engineers
  • Smart Contract Security researchers

Potential Careers

Web3 Developer Relations

$85,000 - $125,000 (avg. salary)

Web3 developer

$60,000 - $150,000 (avg. salary)

Smart Contract Engineer

$100,000 - $150,000 (avg. salary)

Smart Contract Auditor

$100,000 - $200,000 (avg. salary)

Security researcher

$49,999 - $120,000 (avg. salary)

Meet your instructors

Patrick Collins

Patrick Collins

Founder at Cyfrin

Web3 engineer, educator, and Cyfrin co-founder. Patrick's smart contract development and security courses have helped hundreds of thousands of engineers kickstarting their careers into web3.

Guest lecturers:

Juliette Chevalier

Juliette Chevalier

Lead Developer relations at Aragon

Ciara Nightingale

Ciara Nightingale

Developer relations at Thirdweb
Vasiliy Gualoto

Vasiliy Gualoto

Developer relations at Cyfrin
Nader Dabit

Nader Dabit

Director of developer relations at Avara

Ally Haire

Ally Haire

Developer relations at Protocol Labs

Harrison

Harrison

Founder at GasliteGG

Vitto Rivabella

Vitto Rivabella

Lead Developer relations at Cyfrin

Last updated on November 12, 2024

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DeForm Founding Engineer

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