Welcome to the repository for the Ultimate Solidity, Blockchain, and Smart Contract - Beginner to Expert Full Course | Javascript Edition FreeCodeCamp course!

All code references have both a javascript and a typescript edition.

Recommended Testnet: Rinkeby

Resources For This Course

Questions

• Github Discussions
  • Ask questions and chat about the course here!
• Stack Exchange Ethereum
  • Great place for asking technical questions about Ethereum
• StackOverflow
  • Great place for asking technical questions overall

Table of Contents

• Resources For This Course
  • Questions
• Table of Contents
• Lesson 0: Welcome To Blockchain
  • What is a Blockchain?
  • Making Your First Transaction
  • How Do Blockchains Work?
    • Consensus
• Lesson 1: Welcome to Remix! Simple Storage
  • Everything in this section can be read about in the Solidity Documentation
  • Remix
  • Basic Solidity
  • Deploying to a "Live" network
• Lesson 2: Storage Factory
  • Inheritance, Factory Pattern, and Interacting with External Contracts
• Lesson 3: Fund Me
  • Payable, msg.sender, msg.value, Units of Measure
  • Chainlink Oracles
  • Importing from NPM and Advanced Solidity
• Lesson 4: Web3.js Simple Storage
  • Installing VSCode, Python, and Web3
  • Our First Python Script with Web3.js - Deploying a Contract
  • Interacting with Our Contract in Javascript & Web3.js
• Lesson 5: Hardhat Simple Storage
  • Hardhat Introduction
  • Installing Hardhat
  • Testing Basics
  • [Hardhat console]
• Lesson 6: Hardhat Fund Me
  • Introduction
  • Dependencies, Deploying, and Networks
  • Funding and Withdrawing Javascript Scripts
  • Testing across networks
  • Git
• Lesson 7: SmartContract Lottery
  • Introduction
  • Lottery.sol
• Lesson 8: Full Stack Introduction
• Lesson 9: Full Stack Lottery
• Lesson 10: Hardhat Starter Kit
• Lesson 11: ERC20s, EIPs, and Token Standards
• Lesson 12: Defi & Aave
  • Defi Intro
• Lesson 13: NFTs
• Lesson 14: NFT Marketplace
• Lesson 15: Upgrades
• Lesson 16 [DAOs]
• Lesson 17 [Security]
  • Where do I go now?
    • Learning More
    • Community
    • Hackathons

Lesson 0: Welcome To Blockchain

What is a Blockchain?

• Bitcoin Whitepaper
• Ethereum Whitepaper
• Hybrid Smart Contracts
• Blockchain Oracles
• What is a blockchain

Making Your First Transaction

• Metamask
• Etherscan
• Rinkeby Etherscan
• Kovan Etherscan
• Rinkeby 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 Kovan ETH Faucet, just be sure to swap your metamask to kovan!
• Gas and Gas Fees
• Wei, Gwei, and Ether Converter
• ETH Gas Station

How Do Blockchains Work?

• Blockchain Demo
• Public / Private Keys
• Layer 2 and Rollups
• Decentralized Blockchain Oracles
• Block Rewards
• Run Your Own Ethereum Node

Consensus

• Consensus
• Proof of Stake
• Proof of Work
• Nakamoto Consensus
• Ethereum 2 (the merge)

Lesson 1: Welcome to Remix! Simple Storage

💻 Code: https://github.com/PatrickAlphaC/simple_storage

Everything in this section can be read about in the Solidity Documentation

Remix

Basic Solidity

• Versioning
• Compiling
• Contract Declaration
• Types & Declaring Variables
  • uint256, int256, bool, string, address, bytes32
• Default Initializations
• Comments
• Functions
• Deploying a Contract
• Calling a public state-changing Function
• Visibility
• Scope
• View & Pure Functions
• Structs
• Intro to Storage
• Arrays - Dynamic & Fixed sized
• Compiler Errors and Warnings
• Memory, storage, calldata
• Mappings
• SPDX License
• Recap

Deploying to a "Live" network

• A testnet or mainnet
• Find a faucet here
• Connecting Metamask
• Interacting with Deployed Contracts
• The EVM

Lesson 2: Storage Factory

💻 Code: https://github.com/PatrickAlphaC/storage_factory

Inheritance, Factory Pattern, and Interacting with External Contracts

• Factory Pattern
• Imports
• Deploy a Contract From a Contract
• Interact With a Deployed Contract
• Recap

Lesson 3: Fund Me

💻 Code: https://github.com/PatrickAlphaC/fund_me

Payable, msg.sender, msg.value, Units of Measure

• Payable
• Wei/Gwei/Eth Converter
• msg.sender & msg.value

Chainlink Oracles

• Decentralized Oracle Network Chainlink
  • Blockchains can't make API calls
  • Centralized Nodes are Points of Failure
• data.chain.link
• Getting External Data with Chainlink Oracles
  • Chainlink
  • Faucets and Contract Addresses
    • Kovan
  • Getting Price Information

Importing from NPM and Advanced Solidity

• Decimals/Floating Point Numbers in Solidity
• latestRoundData
• Importing from NPM in Remix
• Interfaces
  • Introduction to ABIs
• Getting Price Feed Addresses
• getPrice
• Tuples
  • Unused Tuple Variables
• Matching Units (WEI/GWEI/ETH)
• getConversionRate
• Matching Units (Continued)
• SafeMath & Integer Overflow
  • using keyword
  • Libraries
  • SafeMath PSA
• Setting a Threshold
• Require
• Revert
• Withdraw Function
• Transfer
• Balance
• this
• Contract Owners
• Constructor
• ==
• Modifiers
• Resetting
• for loop
• Array Length
• Forcing a Transaction
• Recap

Lesson 4: Web3.js Simple Storage

💻 Code:

Installing VSCode, Python, and Web3

• Developer Bootcamp Setup Instructions (metamask, vscode, python, nodejs..)
• VSCode
• VSCode Crash Course
• Extensions
• Short Cuts:
  • VSCode Shortcuts
  • VSCode MacOS Shortcuts
• Python
  • Install Troubleshooting
• Terminal
• Making a directory/Folder
• Opening the folder up with VSCode
• Creating a new file
• Syntax Highlights
• Remember to save!
• Setting linting compile version
• VSCode Solidity Settings
  • Formatting & Format on Save
  • Solidity Prettier
  • Python Black
  • pip

Our First Python Script with Web3.js - Deploying a Contract

• Reading our solidity file
• Running a Python Script in the Terminal
• MaxOS Shortcuts
• Windows Shortcuts
• Linux Shortcuts
• Compiling in Python
• py-solc-x
  • compile_standard
• Colorized Brackets
• JSON ABI
• Saving Compiled Code
• Formatting JSON

Interacting with Our Contract in Javascript & Web3.js

Lesson 5: Hardhat Simple Storage

Hardhat Introduction

Installing Hardhat

Testing Basics

[Hardhat console]

• brownie console

Lesson 6: Hardhat Fund Me

Introduction

• Setup

Dependencies, Deploying, and Networks

Funding and Withdrawing Javascript Scripts

Testing across networks

Git

• Tweet it out!

Lesson 7: SmartContract Lottery

💻 Code:

Introduction

• Add a README.md
• Defining the project
• Is it decentralized?

Lottery.sol

Lesson 8: Full Stack Introduction

Lesson 9: Full Stack Lottery

Lesson 10: Hardhat Starter Kit

💻 Code: https://github.com/smartcontractkit/hardhat-starter-kit

Lesson 11: ERC20s, EIPs, and Token Standards

💻 Code:

Lesson 12: Defi & Aave

💻 Code:

Defi Intro

• Defipulse
• Defillama
• Aave Testnet Site
• Paraswap
• Decentralized Exchange

Lesson 13: NFTs

💻 Code

Lesson 14: NFT Marketplace

Lesson 15: Upgrades

💻 Code: https://github.com/PatrickAlphaC/upgrades-mix

Lesson 16 [DAOs]

Lesson 17 [Security]

Where do I go now?

Learning More

• CryptoZombies
• Dapp University
• ChainShot
• Ivan on Tech
• Eat the Blocks
• Patrick Collins
• Austin Griffith
• Nader Dabit
• Ethereum.org

Community

• Twitter
• Brownie Discord
• Ethereum Discord
• Chainlink Discord
• Reddit ethdev

Hackathons

• CL Hackathon
• ETH Global
• ETH India

Be sure to check out project grant programs!

And make today an amazing day!

Improvements from the Python edition:

1. Videos are split into 2 -> 15 minute sections
2. Javascript & Typescript edition of code
3. Deeper explainer of:
   1. Stackoverflow
   2. Stack Exchange ETH
   3. How to ask good questions & get help
4. Aave lesson improvements
5. Fundme lesson improvements
6. Not using sleep to wait for tx to complete
7. Front end stuff