Lessons 0 - 6	Lessons 7 - 11	Lessons 12 - 15

YouTube Playlist

YouTube Playlist of each section

Table of Contents

Disclosures

Thank you

Recommended Tools

• Recommended Testnet: Sepolia
• Recommended DevOps: foundry-devops

Testnet Faucets

• Main Faucet: https://faucets.chain.link
• Backup Faucet: https://sepoliafaucet.com/

⚠️ All code associated with this course is for demo purposes only. They have not been audited and should not be considered production ready. Please use at your own risk.

Resources For This Course

• AI Frens
  • ChatGPT
    • Just know that it will often get things wrong, but it's very fast!
  • Phind
    • Like ChatGPT, but it searches the web
  • Bard
  • Other AI extensions
• Github Discussions
  • Ask questions and chat about the course here!
• Stack Exchange Ethereum
  • Great place for asking technical questions about Ethereum
• Peeranha
  • Decentralized Stack Exchange!

Bonus NFTs

These are 100% optional to do.

• Sepolia
• Arbitrum

After every lesson, you'll see two QR codes. Those codes will send you to an NFT deployed to Sepolia or Arbitrum. They contain a challenge for you to solve, and in return, you'll be given an AWESOME NFT.

Important Notes for Arbitrum

IF YOU DECIDE TO MINT THE REAL NFT:

1. We didn't audit the NFT, so if you want to make sure you'll be safe, interact with the contract using a burner wallet (a wallet with very little money that you don't use for anything else)
   1. In fact... Get good at interacting with wallets from a burner wallet
2. Read my Tweet thread on basic wallet safety
3. It might be a good idea to wait till later in the course when we teach you about verifying metamask transactions.
4. Feel free to mint NFTs on sepolia without worrying about the above

Bridging to Arbitrum

1. We didn't show you how to bring ETH -> Arbitrum, but the process would be:
   1. Buy ETH (On an exchange like Coinbase or Kraken)
2. Send ETH -> one of your wallets like:
   1. Metamask
   2. Frame
   3. Rainbow
   4. Argent
   5. Coinbase Wallet
3. Use the Arbitrum Bridge

Video 1

Lesson 0: Welcome to the Course!

Welcome to the Course!

⭐️ (0:00:00) | Lesson 0: Welcome!

Best Practices

• Follow the repository: While going through the course be 100% certain to follow along with the github repository. If you run into in an issue check the chronological-updates in the repo.
• Be Active in the community: Ask questions and engage with other developers going through the course in the discussions tab, be sure to go and say hello or gm! This space is different from the other industries, you don't have to be secretive; communicate, network and learn with others :)
• Learn at your own pace: It doesn't matter if it takes you a day, a week, a month or even a year. Progress >>> Perfection
• Take Breaks: You will exhaust your mind and recall less if you go all out and watch the entire course in one sitting. Suggested Strategy every 25 minutes take a 5 min break, and every 2 hours take a longer 30 min break
• Refer to Documentation: Things are constantly being updated, so whenever Patrick opens up some documentation, open it your end and maybe even have the code sample next to you.
• Use ChatGPT and/or the course chat

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Lesson 1: Blockchain Basics

⭐️ (0:13:54) | Lesson 1: Blockchain Basics

What is a Blockchain? What does a blockchain do?

• Bitcoin Whitepaper
  • Satoshi Nakamoto
• Ethereum Whitepaper
  • Vitalik Buterin
• What is a Smart Contract?
• Nick Szabo
• Hybrid Smart Contracts
• Blockchain Oracles
• Terminology
• Web3
• What is a blockchain

The Purpose Of Smart Contracts

⌨️ (0:24:26) | The Purpose Of Smart Contracts

• 🎥 Original Video
• 🦬 My ETH Denver Talk
• 🍔 McDonalds Scandal
• ⛓ More on the evolution of agreements
• ✍️ What is a Smart Contract?
• 🧱 How does a blockchain work?
• 🔮 Chainlink & Oracles

Other Blockchain Benefits

⌨️ (0:39:53) | Other Blockchain Benefits

• Decentralized
• Transparency & Flexibility
• Speed & Efficiency
• Security & Immutability
• Counterparty Risk Removal
• Trust Minimized Agreements

What have Smart Contracts done so far?

⌨️ (0:44:20) | What have Smart Contracts done so far?

• DeFi
  • Defi Llama
  • Why DeFi is Important
• DAOs
• NFTs

Making Your First Transaction

⌨️ (0:46:55) | Making Your First Transaction

• Metamask Download Link
  • What is a Private Key?
  • What is a Secret Phrase?
• Etherscan
• Sepolia Etherscan
• Sepolia Faucet (Check the link token contracts page)
  • NOTE: The Chainlink documentation always has the most up to date faucets on their link token contracts page. If the faucet above is broken, check the chainlink documentation for the most up to date faucet.
• OR, use the Sepolia ETH Faucet, just be sure to swap your metamask to Sepolia!

Gas I: Introduction to Gas

⌨️ (1:06:16) | Gas I: Introduction to Gas

• Gas and Gas Fees
• Wei, Gwei, and Ether Converter
• ETH Gas Station

How Do Blockchains Work?

⌨️ (1:15:39) | How Do Blockchains Work?

• What is a hash?
• Blockchain Demo
• Summary

Signing Transactions

⌨️ (1:33:09) | Signing Transactions

• Public / Private Keys
• Layer 2 and Rollups
• Decentralized Blockchain Oracles

Gas II

⌨️ (1:42:15) | Gas II

• Block Rewards
• Advanced Gas
  • EIP 1559
  • GWEI, WEI, and ETH
    • ETH Converter

Gas II Summary

⌨️ (1:48:40) | Gas II Summary

• Run Your Own Ethereum Node

High-Level Blockchain Fundamentals

⌨️ (1:51:36) | High-Level Blockchain Fundamentals

• Consensus
• Proof of Stake
• Proof of Work
• Nakamoto Consensus
• The merge

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Lesson 2: Welcome to Remix - Remix Simple Storage

💻 Code: https://github.com/cyfrin/remix-simple-storage-f23

Introduction

⭐️ (2:10:42) | Lesson 2: Welcome to Remix - Simple Storage

• Remix
• Solidity Documentation

Setting Up Your First Contract

⌨️ (2:16:40) | Setting Up Your First Contract

• Versioning
• Take notes in your code!
• What is a software license
• SPDX License
• Compiling
• Contract Declaration

Basic Solidity: Types

⌨️ (2:24:09) | Basic Solidity Types

• Types & Declaring Variables
  • uint256, int256, bool, string, address, bytes32
  • Solidity Types
  • Bits and Bytes
• Default Initializations
• Comments

Basic Solidity: Functions

⌨️ (2:31:57) | Basic Solidity Functions

• Functions
• Deploying a Contract
  • Smart Contracts have addresses just like our wallets
• Calling a public state-changing Function
• Visibility
• Gas III | An example
• Scope
• View & Pure Functions

Basic Solidity: Arrays & Structs

⌨️ (2:51:29) | Basic Solidity Arrays & Structs

• Structs
• Intro to Storage
• Arrays
• Dynamic & Fixed Sized
• push array function

Basic Solidity: Compiler Errors and Warnings

⌨️ (3:03:31) | Basic Solidity Errors & Warnings

• Yellow: Warnings are Ok
• Red: Errors are not Ok

Memory, Storage, Calldata (Intro)

⌨️ (3:08:13) | Basic Solidity Memory, Storage, & Calldata (Intro)

• 6 Places you can store and access data
  • calldata
  • memory
  • storage
  • code
  • logs
  • stack

Mappings

⌨️ (3:14:37) | Basic Solidity Mappings

• Mappings

Deploying your First Contract

⌨️ (3:17:46) | Deploying your First Contract

• A testnet or mainnet
• Connecting Metamask
• Find a faucet here
• See the faucets at the top of this readme!
• Interacting with Deployed Contracts

The EVM & A Recap of Lesson 2

⌨️ (3:27:07) | The EVM & A Recap of Lesson 2

• The EVM

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Lesson 3: Remix Storage Factory

💻 Code: https://github.com/cyfrin/remix-storage-factory-f23

Introduction

⭐️ (3:29:58) | Lesson 3 | Storage Factory

• Factory Pattern

Basic Solidity: Importing Contracts into other Contracts

⌨️ (3:41:30) | Importing Contracts into other Contracts

• Composibility
• Solidity new keyword
• Importing Code in solidity

Basic Solidity: Interacting with other Contracts

⌨️ (3:52:49) | Interacting with other contracts

• To interact, you always need: ABI + Address
• ABI

Basic Solidity: Inheritance & Overrides

⌨️ (4:00:44) | Inheritance & Overrides

• Inheritance
• Override & Virtual Keyword

Lesson 3 Recap

⌨️ (4:07:37) | Lesson 3 Recap

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Lesson 4: Remix Fund Me

💻 Code: https://github.com/Cyfrin/remix-fund-me-f23

Introduction

⭐️ (4:09:08) | Lesson 4 | Fund Me

Setup

⌨️ (4:12:20) | Setup

Sending ETH through a function

⌨️ (4:14:00) | Sending ETH through a function

• Ethereum Unit Converter

• Fields in a Transaction

• More on v,r,s

• payable

• msg.value & Other global keywords

• require

• revert

Reverts

⌨️ (4:18:15) | Reverts

Getting real world price data (Chainlink)

⌨️ (4:22:06) | Getting real world price data (Chainlink)

• What is a blockchain oracle?
• What is the oracle problem?
• Chainlink
• Chainlink Price Feeds (Data Feeds)
  • data.chain.link
• Chainlink VRF
• Chainlink Keepers
• Chainlink API Calls
• Importing Tokens into your Metamask
• Request and Receive Chainlink Model

Quick recap I

⌨️ (4:36:22) | Quick recap I

Interfaces

⌨️ (4:37:08) | Interfaces

• For reference - ChainLink Interface's Repo

AI Help III

⌨️ (4:43:31) | AI Help III

Importing from NPM / GitHub

⌨️ (4:46:03) | Importing from NPM / GitHub

• Chainlink NPM Package

Getting Prices from Chainlink

⌨️ (4:48:07) | Getting Prices from Chainlink

More Solidity math

⌨️ (4:52:00) | More Solidity math

• Multiply before you divide
• tuple
• Floating Point Numbers in Solidity
• Type Casting
• Gas Estimation Failed
  • Someone should make an article explaining this error

msg.sender

⌨️ (4:58:07) | msg.sender

• msg.sender
• named mappings

Quick recap II

⌨️ (4:59:53) | Quick recap II

Library

⌨️ (5:00:46) | Library

• Library
• Solidity-by-example Library

SafeMath

⌨️ (5:05:45) | SafeMath

• Openzeppelin Safemath
• unchecked vs. checked

For Loop

⌨️ (5:10:48) | For Loop

• For Loop
• /* */ is another way to make comments

Resetting an array

⌨️ (5:15:32) | Resetting an array

Transfer, Send, and Call

⌨️ (5:16:32) | Transfer, Send, and Call

• Transfer, Send, Call
• this keyword

Constructor

⌨️ (5:24:23) | Constructor

• Constructor

Modifiers

⌨️ (5:27:37) | Modifiers

• Double equals
• Modifier

Testnet Demo

⌨️ (5:29:54) | Tesnet Demo

• Disconnecting Metamask

Advanced Solidity

⌨️ (5:34:01) | Advanced Solidity

Immutable & Constant

⌨️ (5:34:53) | Immutable & Constant

• Immutable
• Constant
• Current ETH Gas Prices
• Don't stress about gas optimizations! (yet)
• Naming Conventions
  • Someone make this!

Custom Errors

⌨️ (5:42:08) | Custom Errors

• Custom Errors Introduction

Receive & Fallback Functions

⌨️ (5:44:56) | Receive & Fallback Functions

• Solidity Docs Special Functions
• Fallback
• Receive

Lesson 4 Recap

⌨️ (5:57:10) | Lesson 4 Recap

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Lesson 5: AI Prompting, Asking Questions, and Getting Help

DO NOT SKIP THIS!!

⭐️ (6:00:00) | Lesson 5 | AI Prompting

Intro

• Deep Learning for Python Engineers

7 Tips for this Course

• Original Video

Setting up GitHub

⌨️ (6:12:57) | Setting up GitHub

Formatting a question

⌨️ (6:14:24) | Formatting a question

• markdown

• It's a good idea to ask your AI buddy to format your questions in markdown *

SpeedRunEthereum

⌨️ (6:19:58) | SpeedRunEthereum

• Special Guest Austin

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Lesson 6: Foundry Simple Storage

💻 Code: https://github.com/Cyfrin/foundry-simple-storage-f23

Introduction

⭐️ (6:23:59) | Lesson 6 | Foundry Simple Storage

Installation & Setup (MacOS & Linux)

⌨️ (6:29:44) | Installation & Setup (MacOS & Linux)

• Visual Studio Code
  • Crash Course
• VSCode Keybindings
• Git
• What is a terminal?

Windows Setup (WSL)

⌨️ (6:32:26) | Windows Setup (WSL)

• Special Guest Vasiliy
• WSL
  • When working in WSL, use Linux commands instead of Windows commands
• TroubleShooting
• curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash

⚠️ Please use Gitpod as an absolute last resort

Gitpod

⌨️ (6:40:19) | Gitpod

• Gitpod
  • If using this, NEVER share a private key with real money on Gitpod
  • Ideally you figure out the MacOS, Linux, or Windows install though

Local Development Introduction

• CMD + K or CTRL + K clears the terminal
• code . to open VSCode in a new VSCode window

Foundry Install

⌨️ (6:44:37) | Foundry Install

• https://getfoundry.sh

VSCode Setup II

⌨️ (6:52:00) | VSCode Setup II

• CoPilot
• Copilot labs
• Hardhat Solidity Extension
• VSCodium
• mkdir foundry-f23
• cd foundry-f23
• mkdir foundry-simple-storage-f23

Foundry Setup

⌨️ (6:57:17) | Foundry Setup

• FreeCodeCamp Bash

Formatting Solidity in VSCode

⌨️ (7:04:19) | Formatting Solidity in VSCode

• Format your solidity code with in your settings.json

    "[solidity]": {
        "editor.defaultFormatter": "NomicFoundation.hardhat-solidity"
    },
    "[javascript]":{
      "editor.defaultFormatter": "esbenp.prettier-vscode"
    }

Compiling in Foundry

⌨️ (7:08:31) | Compiling in Foundry

Deploying to a local chain I (Anvil or Ganache)

⌨️ (7:09:49) | Deploying to a local chain I (Anvil or Ganache)

• Ganache

Adding another network to Metamask

⌨️ (7:17:44) | Adding another network to Metamask

• ETH JSON RPC

Deploying to a local chain II (Forge Create)

⌨️ (7:19:41) | Deploying to a local chain II (Forge Create)

• 2 Ways to deploy:
  • 1. forge create
  • 2. forge script

Private Key Rant I

⌨️ (7:23:45) | Private Key Rant I

• history -c

Deploying to a local chain III (Forge Script)

⌨️ (7:26:17) | Deploying to a local chain III (Forge Script)

What is a transaction (But actually)

⌨️ (7:36:02) | What is a transaction (But actually)

cast --to-base 0x01 dec

Private Key Rant II

⌨️ (7:41:41) | Private Key Rant II

• cast send
• source .env

Can you Encrypt a Private Key -> a keystore in foundry yet??

⌨️ (7:45:00) | Can you Encrypt a Private Key -> a keystore in foundry yet??

• A: No
• The .env pledge

ThirdWeb Deploy

⌨️ (7:51:44) | ThirdWeb Deploy

• Special Guest Ciara
• nodejs install
• npm install
• thirdweb

Private Key Rant Summary:

⌨️ (7:56:25) | Private Key Rant Summary

Summary:
When you look to deploy 
with real money, you should use either:
1. A password encrypted keystore
2. Something like thirdweb deploy

The idea is you never want to have 
your private key or password 
ANYWHERE written in plain text
(Aka, you always want it encrypted)

• Someone fix this please

Cast Send

⌨️ (7:56:40) | Cast Send

Deploying to a testnet or a mainnet

⌨️ (8:00:26) | Deploying to a testnet or a mainnet

• Alchemy
• Other node as a service:
  • Quicknode
  • Infura

Verifying a contract the manual way

⌨️ (8:06:06) | Verifying a contract the manual way

• Example verified contract

Cleaning up the project

⌨️ (8:07:43) | Cleaning up the project

• forge fmt
• README.md

Alchemy & the mempool

⌨️ (8:10:28) | Alchemy & the mempool

• Special Guest Vitto
• Alchemy

Summary

⌨️ (8:21:28) | Summary

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🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊

Completed Video 1!!

🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊

Lesson 7: Foundry Fund Me

⭐️ (0:00:00) | Lesson 7: Foundry Fund Me

💻 Code: https://github.com/Cyfrin/foundry-fund-me-f23

Introduction

⌨️ (0:09) | Introduction

Setup

⌨️ (2:51) | Setup

Testing Introduction

⌨️ (4:40) | Testing Introduction

Setup Continued

⌨️ (6:14) | Setup Continued

• Chainlink Brownie Contracts Github Repo

  forge install smartcontractkit/[email protected] --no-commit

• Dependencies
• remappings
• Chainlink Brownie Contracts

Tests

⌨️ (11:54) | Tests

• foundry tests
• console.log

Debugging Tests I

⌨️ (20:45) | Debugging Tests I

Advanced Deploy Scripts I

⌨️ (23:16) | Advanced Deploy Scripts I

Forked Tests

⌨️ (25:47) | Forked Tests

• The test option -m regex is deprecated. Please use --match-test or --mt instead.

forge test -m testPriceFeedVersionIsAccurate -vvv

is depreciated. Please use

forge test --match-test testPriceFeedVersionIsAccurate -vvv

• 4 types of testing:

1. Unit: Testing a single function
2. Integration: Testing multiple functions
3. Forked: Testing on a forked network
4. Staging: Testing on a live network (testnet or mainnet)

• forking in foundry
• forge coverage

Refactoring I: Testing Deploy Scripts

⌨️ (34:17) | Refactoring I: Testing Deploy Scripts

Refactoring II: Helper Config

⌨️ (41:28) | Refactoring II: Helper Config

• block.chainid
• Chain ID List
  • 11155111 is ETH Sepolia
  • 1 is ETH Mainnet

Refactoring III: Mocking

⌨️ (54:32) | Refactoring III: Mocking

• Mocking
• Chainlink Github
• Multiple Versions of Solidity

Magic Numbers

⌨️ (58:40) | Magic Numbers

• Style Guide
• Magic Numbers

Refactoring III: Mocking (continued)

⌨️ (1:00:45) | Refactoring III: Mocking (continued)

Break time!

⌨️ (1:05:02) | Break time!

Take a break!

More Cheatcodes

⌨️ (1:05:06) | More Cheatcodes

• foundry cheatcodes
• forge std cheats
  • vm.expectRevert
  • vm.prank
  • makeAddr
  • deal

More Coverage

⌨️ (1:17:36) | More Coverage

• State tree testing
• Arrange, Act, Assert
• hoax
• uint160 -> address
• vm.startPrank

Chisel

⌨️ (1:32:26) | Chisel

• Chisel

Gas: Cheaper Withdraw

⌨️ (1:33:50) | Gas: Cheaper Withdraw

• Gas Reporter
• forge snapshot
• vm.txGasPrice
• gasLeft()
• tx.getprice

Storage

⌨️ (1:38:37) | Storage

• ** Advanced **
• Storage Layout
• Purpose of the memory keyword

cast storage

• Opcodes
• Opcodes by Gas
• Opcodes by Gas
• Append s_ to storage variables
• Append i_ to immutable variables
• Caps lock and underscore constant variables
• Chainlink Solidity Style Guide

Gas: Cheaper Withdraw (continued)

⌨️ (1:48:20) | Gas: Cheaper Withdraw (continued)

• evm.codes
• Style Guide
  • Chainlink Style Guide
• NatSpec

Interactions.s.sol

⌨️ (1:56:11) | Interactions.s.sol

• foundry devops
• Best README Template
• ffi

Makefile

⌨️ (2:10:56) | Makefile

• Install make
• Install make Ubuntu.
• Etherscan API Key

Pushing to GitHub

⌨️ (2:19:17) | Pushing to GitHub

• Add these to your .gitignore
  • .env
  • lib/
  • broadcast/
• Git Docs
• GitHub docs
• Github Quickstart
• What is Git?
• The quickstart that we follow in the video
• Learn about git and GitHub

🐸🐦 Tweet Me (add your repo in)!

⌨️ (2:34:56) | Tweet Me (add your repo in)!

Lesson 7: Recap

⌨️ (2:35:13) | Lesson 7: Recap

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Lesson 8: Html/Js Fund Me (Quick Fullstack / Front End Tutorial)

⭐️ (2:37:02) | Lesson 8: HTML Fund Me

💻 Code: https://github.com/Cyfrin/html-fund-me-f23

• More in-depth Javascript & Full Stack introduction video

Introduction

Setup

⌨️ (2:38:59) | Setup

• Live Server Extension

How Metamask works with your browser

⌨️ (2:40:25) | How Metamask works with your browser

• Metamask Docs
• Ethers Docs

Introduction to function selectors

⌨️ (2:52:34) | Introduction to function selectors

• Function selector
• cast sig

Recap

⌨️ (3:00:00) | Recap

• More in-depth Javascript & Full Stack introduction video

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Lesson 9: Foundry Smart Contract Lottery

⭐️ (3:04:09) | Lesson 9: Smart Contract Lottery

💻 Code: https://github.com/Cyfrin/foundry-smart-contract-lottery-f23

Introduction

Raffle.sol Setup

⌨️ (3:08:16) | Raffle.sol Setup

• Raffle.sol Setup

Solidity Contract Layout

⌨️ (3:15:53) | Solidity Contract Layout

// Layout of Contract:
// version
// imports
// errors
// interfaces, libraries, contracts
// Type declarations
// State variables
// Events
// Modifiers
// Functions

// Layout of Functions:
// constructor
// receive function (if exists)
// fallback function (if exists)
// external
// public
// internal
// private
// internal & private view & pure functions
// external & public view & pure functions

Custom Errors

⌨️ (3:17:37) | Custom Errors

• Custom Errors in Solidity

Events

⌨️ 3:22:00 | Events

• Introduction to Events

• Events & Logging Video
• Events & Logging in Hardhat

block.timestamp

⌨️ (3:33:29) | block.timestamp

Chainlink VRF

⌨️ (3:37:13) | Chainlink VRF

• Introduction to Chainlink VRF

• Special Guest Richard

Sub-Lesson: Chainlink VRF

• Chainlink VRFv2 Docs
• Chainlink VRFv2 Walkthrough
• Chainlink Contracts

Implementing Chainlink VRF - Introduction

⌨️ (3:47:21) | Implementing Chainlink VRF - Introduction

• Implementing Chainlink VRF

• Get Sepolia Testnet LINK tokens
• Chainlink docs - create a random number
• Chainlink Brownie Contracts

forge install smartcontractkit/[email protected] --no-commit

Implementing Chainlink VRF - The Request

Implementing Chainlink VRF - The FulFill

Chainlink VRF Recap

Modulo

⌨️ (4:03:32) | Modulo

• Modulo

Enum

⌨️ (4:08:57) | Enum

Resetting an array

⌨️ (4:13:04) | Resetting an array

Note on building

⌨️ (4:14:31) | Note on building

CEI (Checks, Effects, Interactions)

⌨️ (4:16:00) | CEI (Checks, Effects, Interactions)

Introduction to Chainlink Automation

⌨️ (4:18:31) | Introduction to Chainlink Automation

• Chainlink Automation Docs
• Chainlink Automation Walkthrough

Implementing Chainlink Keepers - checkUpkeep

⌨️ (4:33:47) | Implementing Chainlink Keepers - checkUpkeep

Enums

• Enum

Implementing Chainlink Keepers - checkUpkeep continued

• block.timestamp

Implementing Chainlink Keepers - performUpkeep

⌨️ (4:40:10) | Implementing Chainlink Keepers - performUpkeep

Mid-Lesson Recap

⌨️ (4:43:00) | Mid-Lesson Recap

Tests & Deploy Script Setup

⌨️ (4:44:08) | Tests & Deploy Script Setup

Mock Chainlink VRF Coordinator

⌨️ (4:52:02) | Mock Chainlink VRF Coordinator

Tests & Deploy Script Continued

⌨️ (4:56:25) | Tests & Deploy Script Continued

Lots of Tests

⌨️ (5:04:50) | Lots of Tests

Testing Events in Foundry

⌨️ (5:09:37) | Testing Events in Foundry

vm.roll & vm.warp

⌨️ (5:12:37) | vm.roll & vm.warp

Create Subscription Script

⌨️ (5:15:21) | Create Subscription Script

• eth signature database

Create Subscription from the UI

⌨️ (5:26:41) | Create Subscription from the UI

Fund Subscription Script

⌨️ (5:30:19) | Fund Subscription Script

• Link Token
• Solmate
• Openzeppelin

Add Consumer Script

⌨️ (5:42:29) | Add Consumer Script

More Tests

⌨️ (5:52:44) | More Tests

• forge coverage --report debug

PerformUpkeep Tests

⌨️ (5:59:12) | PerformUpkeep Tests

• Expecting Custom Errors

Getting Event Data into Foundry Scripts

⌨️ (6:03:23) | Getting Event Data into Foundry Scripts

• vm.recordLogs

Intro to Fuzz tests

⌨️ (6:11:48) | Intro to Fuzz tests

One Big Test

⌨️ (6:15:41) | One Big Test

Passing the private key to vm.startBroadcast

⌨️ (6:26:30) | Passing the private key to vm.startBroadcast

Integrations Test

⌨️ (6:41:08) | Integrations Test

Testnet Demo - Makefile setup

⌨️ (6:44:42) | Testnet Demo - Makefile setup

Testnet Demo - The Demo

⌨️ (6:52:33) | Testnet Demo - The Demo

Console.log Debugging

⌨️ (6:59:30) | Console.log Debugging

forge test --debug

⌨️ (7:01:06) | forge test --debug

Recap

⌨️ (7:02:07) | Recap

Recommended LINK amounts for Sepolia Staging Test:

• Chainlink VRF: 2 LINK
• Chainlink Keepers: 8 LINK

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Lesson 10: Foundry ERC20s

⭐️ (7:08:04) | Lesson 10: ERC20s

💻 Code: https://github.com/Cyfrin/foundry-erc20-f23

What is an ERC? What is an EIP?

• What is an EIP?
• EIPs codebase

What is an ERC20?

⌨️ (7:10:42) | What is an ERC20?

• Video (using brownie/python)
• EIP-20
• ERC-677
• EIP-777

Manually Creating an ERC20 Token

⌨️ (7:12:06) | Manually Creating an ERC20 Token

• .github

ERC20 Token - Openzeppelin

⌨️ (7:19:01) | ERC20 Token - Openzeppelin

• Openzeppelin
  • Openzeppelin Wizard
• Openzeppelin Contracts
• Solmate (Openzeppelin alternative)

Deploy Script

⌨️ 7:22:58 | Deploy Script

AI Tests

⌨️ (7:25:48) | AI Tests

• Token Approvals

Lesson 10 Recap

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Lesson 11: Foundry NFTs | MoodNFT

⭐️ (7:40:56) | Lesson 11: NFTs

💻 Code: https://github.com/Cyfrin/foundry-nft-f23

Introduction

What is an NFT?

⌨️ (7:43:21) | What is an NFT?

• Video
• [Optional: All on Chain SVG NFT]
• EIP-721

Foundry Setup

⌨️ (7:49:54) | Foundry Setup

• TokenURI
• Pudgy Penguin Example

IPFS

⌨️ (8:00:24) | IPFS

• What is IPFS

Using IPFS

⌨️ (8:07:30) | Using IPFS

Basic NFT: Deploy Script

⌨️ (8:13:59) | Basic NFT: Deploy Script

Basic NFT: Tests

⌨️ (8:15:25) | Basic NFT: Tests

• Comparing strings in solidity
• chisel

Basic NFT: Interactions

⌨️ (8:25:31) | Basic NFT: Interactions

Basic NFT: Testnet Demo

⌨️ (8:28:24) | Basic NFT: Testnet Demo

The issue with IPFS & HTTPS TokenURI NFTs

⌨️ (8:34:32) | The issue with IPFS & HTTPS TokenURI NFTs

• pinata
• SVG NFT Video

What is an SVG?

⌨️ (8:38:30) | What is an SVG?

• svg
• vscode extension
• base64 encoding

SVG NFT: Introduction

⌨️ (8:45:54) | SVG NFT: Introduction

SVG NFT: Encoding the NFT

⌨️ (8:50:03) | SVG NFT: Encoding the NFT

• base64 openzeppelin

SVG NFT: Flipping the mood

⌨️ (9:06:41) | SVG NFT: Flipping the mood

SVG NFT: Deploy Script

⌨️ (9:08:44) | SVG NFT: Deploy Script

• readFile Cheat

SVG NFT: Debugging practice & some notes

⌨️ (9:25:46) | SVG NFT: Debugging practice & some notes

SVG NFT: Anvil Demo

⌨️ (9:31:29) | SVG NFT: Anvil Demo

• arweave
• filecoin
• nft.storage
• Patrick video on Filecoin

Filecoin & Arweave

⌨️ (9:36:58) | Filecoin & Arweave

• Special Guest Ally

Advanced: EVM Opcodes, Encoding, and Calling

⌨️ (9:44:02) | Advanced: EVM Opcodes, Encoding, and Calling

abi.encode & abi.encodePacked

• abi.encode
• abi.encodePacked Thanks to Alex Roan for his help on this session!
• Example Contract Creation Transaction What REALLY is the ABI?
• EVM Opcodes
• More EVM Opcodes
• Solidity Cheatsheet
• abi.encode vs abi.encodePacked

Introduction to Encoding Function Calls Directly

⌨️ (10:06:27) | Introduction to Encoding Function Calls Directly

Introduction to Encoding Function Calls Recap

⌨️ (10:12:16) | Introduction to Encoding Function Calls Recap

Encoding Function Calls Directly

⌨️ (10:14:15) | Encoding Function Calls Directly

• Function Selector
• Function Signature

Verifying Metamask Transactions

⌨️ (10:28:45) | Verifying Metamask Transactions

1. Check the address
2. Check the function selector
3. Decode the calldata

• joinfire.zxyz

Lesson 11 Recap

⌨️ (10:36:31) | Lesson 11 Recap

• ENS

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🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊

Completed Video 2!!

🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊

Lesson 12: Foundry DeFi | Stablecoin (The PINNACLE PROJECT!! GET HERE!)

💻 Code: https://github.com/Cyfrin/foundry-defi-stablecoin-f23

Introduction

⭐️ (0:00:00) | Lesson 12: DeFi Stablecoins

What is DeFi?

• What is DeFi?
• DefiLlama
• Bankless
• MEV
• Aave
• My Previous Aave Video on Shorting Assets
• DAI
• Uniswap
• Maximal Extractable Value (MEV)

Code Walkthrough

⌨️ (0:09:17) | Code Walkthrough

• What is a smart contract audit

What is a stablecoin (But actually)

⌨️ (0:12:23) | What is a stablecoin (But actually)

• Video
• MakerDAO Forums

DecentralizedStableCoin.sol

⌨️ (0:40:41) | DecentralizedStableCoin.sol

• What is a smart contract audit
• super

DSCEngine.sol Setup

⌨️ (0:54:44) | DSCEngine.sol Setup

• liquidations
• nonreentrant
  • reentrancy

Deposit Collateral

⌨️ (1:04:49) | Deposit Collateral

• Other DeFi Examples:
  • Aave V2 Docs
  • Aave NPM

Mint DSC

Getting the value of our collateral

⌨️ (1:22:51) | Getting the value of our collateral

• Aave Borrowing FAQs
• Health Factor
• Aave Risk Parameters

Health Factor

⌨️ (1:39:11) | Health Factor

• Liquidation Threshold

Minting the DSC

⌨️ (1:46:02) | Minting the DSC

Testing while developing

Deploy Script

⌨️ (1:47:28) | Deploy Script

• WETH Token Sepolia Etherscan
• WETH Token Mainnet

Tests

⌨️ (2:02:24) | Tests

depositCollateralAndMintDsc

⌨️ (2:13:45) | depositCollateralAndMintDsc

redeemCollateral

⌨️ (2:16:12) | redeemCollateral

Liquidate

Setup

⌨️ (2:27:49) | Setup

Refactoring

⌨️ (2:44:45) | Refactoring

Leveling up your testing skillz

⌨️ (2:56:55) | Leveling up your testing skillz

Challenge: Get DSCEngine.sol test coverage above 85%

Fuzz (Invariant) Testing

⌨️ (3:13:50) | Fuzz (Invariant) Testing

• Video

Open-based Fuzz tests

⌨️ (3:27:18) | Open-based Fuzz tests

Handler-based Fuzz tests

revert_on_fail = true

⌨️ (3:46:55) | revert_on_fail = true

Redeeming Collateral

⌨️ (4:03:57) | Redeeming Collateral

Minting DSC

⌨️ (4:09:42) | Minting DSC

Debugging Fuzz Tests

⌨️ (4:15:01) | Debugging Fuzz Tests

• Ghost Variables

Challenge: Find out why mintDsc is never being called on our Handler.sol

Price Feed Handling

⌨️ (4:23:30) | Price Feed Handling

OracleLib

⌨️ (4:31:28) | OracleLib

Note on audit preparedness

⌨️ (4:39:57) | Note on audit preparedness

• Simple security checklist

Recap

⌨️ (4:41:06) | Recap

Lens Protocol

⌨️ (4:44:38) | Lens Protocol

• Special Guest Nader
• Lens Protocol

More DeFi Learnings:

• Defi-Minimal
• Defi Dad

QR Code for Lesson 12 Arbitrum:

QR Code for Lesson 12 Sepolia:

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Lesson 13: Foundry Upgrades

💻 Code: https://github.com/Cyfrin/foundry-upgrades-f23

Introduction

⭐️ (4:47:00) | Lesson 13: Upgradable Contracts & Proxies

Upgradable Smart Contracts Overview

• Optional Video

Types of Upgrades

1. Parameter
2. Social Migrate
3. Proxy
   1. Proxy Gotchas
      1. Function Collisions
      2. Storage Collisions
   2. Metamorphic Upgrades
   3. Transparent
   4. UUPS
   5. Diamond

Delegatecall

⌨️ (5:02:20) | Delegatecall

• delegatecall (solidity-by-example)
• Yul

Small Proxy Example

⌨️ (5:10:24) | Small Proxy Example

• EIP 1967

Universal Upgradable Smart Contract

Setup

⌨️ (5:21:53) | UUPS Setup

• UUPS vs Transparent
• Abstract Contracts

Initializer

⌨️ (5:34:24) | Initializer

Deploy

⌨️ (5:43:34) | Deploy

• ERC-1967

UpgradeBox

⌨️ (5:48:29) | Upgradebox

Test/Demo

⌨️ (5:53:48) | Test/Demo

Testnet Demo

⌨️ (5:59:40) | Testnet Demo

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Lesson 14: Foundry DAO / Governance

Plutocracy is bad! Don't default to ERC20 token voting!!

💻 Code: https://github.com/Cyfrin/foundry-dao-f23

Introduction

⭐️ (6:05:45) | Lesson 14 | DAOs & Governance

• Plutacray is bad
• DAOs are not corporations

What is a DAO?

• What is a DAO?
• Special Guest Juliette

How to build a DAO

Setup

• How to build a DAO
• That's Patrick
• PY Code
• Python Video

Governance Token

• Openzeppelin Governance
• Compound Governance
• Contract Wizard

Governor

• CastVoteBySig

Tests

Wrap up

Bonus: Gas optimization tips

• Special Guest Harrison

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Lesson 15: Smart Contract Security & Auditing (For developers)

Developers 100% should know all about this! Don't leave the course without at least watching this section!

🖥️ Code: https://github.com/PatrickAlphaC/denver-security

Introduction

⭐️ (7:21:12) | Lesson 15 | Security & Auditing

• Readiness Checklist

What is a smart contract audit?

⌨️ (7:24:47) | What is a smart contract audit?

• What is a smart contract audit

Tools

⌨️ (7:31:11) | What tools do security professionals use?

Manual Review

Static Analysis

• Slither
• 4nlyzer

Dynamic Analysis

Formal Verification

Symbolic Execution

• Manticore
• Mythril
• hevm
• Comparison

Fuzzing

• Echidna
• Foundry
• Consensys

Formal Verification (& Symbolic Execution)

• Comparisons

Other security stuff

• solcurity

What does the process of manual review look like?

⌨️ (7:42:32) | Manual Review with Tincho

• Tincho finds $100,000 ENS bug

Formal Verification

⌨️ (7:56:35) | Formal Verification

• Formal Verification & Symbolic Execution | W/ Trail Of Bits

Closing Thoughts

⌨️ (8:10:56) | Wrap. Up

• Common Attacks
• Best Practices
• Attacks
  • Oracle Attacks
• Damn Vulnerable Defi
• Ethernaut
• Top Smart Contract Auditors
• Some Smart Contract Auditors:
  • Cyfrin
  • OpenZeppelin
  • SigmaPrime
  • Trail of Bits
  • Spearbit
  • Dedaub
  • Trust
  • More

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Congratulations

🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊 Completed The Course! 🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊

Where do I go now?

Learning More

• Top 10 learning resources
• Patrick Collins
• CryptoZombies
• Alchemy University
• Speed Run Ethereum
• Ethereum.org

Community

• Twitter
• Ethereum Discord
• Reddit ethdev

Hackathons

• CL Hackathon
• ETH Global
• ETH India

Be sure to check out project grant programs!

And make today an amazing day!

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Disclosures

Transparency is important! So we want to disclose any potential conflicts that might have affected my judgement so you can pick tools that are right for you. Patrick is co-founder of Alpha Chain, a blockchain infrastructure company. Alpha Chain runs Chainlink, Ethereum, Binance, Polygon, Harmony, Solana, Moonbeam, and Moonriver blockchain services. Alpha Chain often works with Alchemy and receives discounted services. Patrick is the co-founder of Cyfrin, and they do smart contract security & auditing services. Patrick is also the co-founder of Chain Accel, who is an advisor on the Peeranha project. Patrick is an advisor on the Chainlink project. The Cyfrin team often does buisness on the Arbitrum L2.

Because of all this, I have added alternatives to each section where we suggest a tool. This video & course was created and sponsored solely by the Cyfrin team.

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Donations

BadgerDAO

We are THRILLED to have received donations from the BadgerDAO protocol.

BadgerDAO is a decentralized collective of builders supporting community driven growth for Bitcoin across DeFi. Deposit to earn Yield-Bearing Rewards that automate and optimize yield from Aura and Convex positions.

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Thank you

Thanks to everyone who is taking, participating in, and working on this course. It's been a passion project and a data dump of everything I've learnt in the web3 space to get you up to speed quickly. Also, a big thank you to Cyfrin & Chain Accel for encouraging this course to come to light, and many, many, many people from the community.

And thanks to the Cyfrin team for making this possible!

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