Lesson 1:  Welcome To Blockchain

• What is a Blockchain?

• Making Your First Transaction

• How Do Blockchains Work?

• Consensus 

Lesson 2: Welcome to Remix! Simple Storage

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
• Mappings
• SPDX License

Deploying to a “Live” network

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

Lesson 3: Storage Factory

Inheritance, Factory Pattern, and Interacting with External Contracts

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

Lesson 4: 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 5: Web3.py Simple Storage

Installing VSCode, Python, and Web3

• 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

Python Script with Web3.py – 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
• Deploying in Python
• Get Bytecode
• Get ABI
• Choose Blockchain to Deploy To
• Local Ganache Chain
• Ganache UI
• Ganache Command Line
• Web3.py
• HTTP / RPC Provider
• Private Keys MUST start with “0x”
• Contract Object
• Building a Transaction
• Account Nonce
• Calling “Contructor”
• Transaction Parameters
• Signing the Transaction
• NEVER put your private key directly in your code
• Setting Environment Variables (Windows, Linux, MacOS)
• More on Windows Environment Variables
• Exported Environment Variables Only Last the Duration of the Shell/Terminal
• Private Key PSA
• .env file
• .gitignore
• Loading .env File in Python
• python-dotenv
• Viewing our Transaction / Deployment in Ganache
• Waiting for Block Confirmations

Interacting with Our Contract in Python & Web3.py

• 2 Things you always need
• Contract Address
• Contract ABI
• Getting address from transaction receipt
• Calling a view function with web3.py
• Call vs Transact
• Updating State with Web3.py
• ganache-cli
• Installing Ganache
• Install Nodejs
• Install Yarn
• Working with ganache-cli
• Open a new terminal in the same window
• Deploying to a testnet
• Infura
• Alchemy
• Using Infura RPC URL / HTTP Provider
• Chain Ids

Lesson 6: Brownie Simple Storage

Brownie Introduction

Installing Brownie

• Installing Brownie
• Install pipx
• pipx install eth-brownie
• Testing Successful Install

Brownie Simple Storage Project

• A new Brownie project with brownie init
• Project Basic Explanation
• Adding SimpleStorage.sol to the contracts folder
• Compiling with brownie compile
• Brownie deploy script
• def main is brownie’s entry point
• brownie defaults to a development ganache chain that it creates
• Placing functions outside of the main function
• brownie accounts
• 3 Ways to Add Accounts
• accounts[0]: Brownie’s “default” ganache accounts
• Only works for local ganache
• accounts.load(“…”): Brownie’s encrypted command line (MOST SECURE)
• Run brownie accounts new <name> and enter your private key and a password
• accounts.add(config[“wallets”][“from_key”]): Storing Private Keys as an environment variable, and pulling from our brownie-config.yaml
• You’ll need to add dotenv: .env to your brownie-config.yaml and have a .env file
• Importing a Contract
• Contract.Deploy
• View Function Call in Brownie
• State-Changing Function Call in Brownie / Contract Interaction
• transaction.wait(1)

Testing Basics

• test_simple_storage.py
• Arrange, Act, Assert
• assert
• brownie test
• test_updating_storage
• Pytest / Brownie Test Tips
• Deploy to a Testnet
• brownie networks list
• Development vs Ethereum
• Development is temporary
• Ethereum networks persist
• RPC URL / HTTP Provider in Brownie
• The network flag
• list index out of range
• get_account()
• networks.show_active()
• build/deployments
• Accessing previous deployments
• Interacting with contracts deployed in our brownie project

Lesson 7: Brownie Fund Me

Introduction

• Setup

Dependencies, Deploying, and Networks

• Dependencies
• chainlink-brownie-contracts
• remappings
• Deploy Script (V1)
• helpful_scripts.py
• __init__.py
• Deploy to Rinkeby
• Contract Verification (publish_source)
• The Manual Way
• “Flattening”
• The Programatic Way
• Getting an Etherscan API Key
• ETHERSCAN_TOKEN
• Interacting with Etherscan
• Deploying to Local Chains
• Introduction to Mocking
• Constructor Parameters
• networks in our brownie-config.yaml
• Copying Mock Contracts from chainlink-mix
• Deploying and using our mock
• Refactoring
• Deploying to a persistent ganache
• brownie attach
• Adding a persistent brownie network
• resetting a network build

Funding and Withdrawing Python Scripts

• Fund Script
• Withdraw Script

Testing across networks

• test_can_fund_and_withdraw
• default networks
• pytest pip install pytest
• pytest.skip
• brownie exceptions
• mainnet-fork
• Custom mainnet fork
• Adding a development brownie network
• brownie networks add development mainnet-fork-dev cmd=ganache-cli host=http://127.0.0.1 fork=’https://infura.io/v3/$WEB3_INFURA_PROJECT_ID’ accounts=10 mnemonic=brownie port=8545
• Alchemy
• brownie test –network mainnet-fork
• brownie ganache vs local ganache vs mainnet-fork vs testnet…

Git

• Installing Git
• Creating a repository
• First time with git
• Adding our project to github

Lesson 8: SmartContract Lottery

Introduction

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

Lottery.sol

• basic setup
• Main Functions
• address payable[]
• getEntranceFee & Setup
• Chainlink Price Feed
• brownie-config
• SPDX
• Matching Units of Measure
• Can’t just divide
• Test early and often
• Quick Math Sanity Check
• deleting networks
• Alchemy again
• Enum
• startLottery
• Openzeppelin… Is this the first openzeppelin reference?
• Openzeppelin Contracts Github
• Randomness
• Pseudorandomness
• block keyword
• block.difficulty
• block.timestamp
• keccack256
• True Randomness with Chainlink VRF
• Chainlink VRF Remix Version
• Inheriting Constructors
• Oracle Gas & Transaction Gas
• Why didn’t we pay gas on the price feeds?
• Chainlink Node Fees
• Request And Receive Introduction
• Kovan Faucets
• Funding Chainlink Contracts
• Request And Receive Explanation
• A Clarification
• endLottery
• returns (type variableName)
• fulfillRandomness
• override
• Modulo Operation (Mod Operation %)
• Paying the lottery winner
• Resetting the lottery

Testing Lottery.sol

• deploy_lottery.py
• get_account() refactored
• get_contract
• contract_to_mock
• Contract.from_abi
• Adding the parameters to deploying to lottery
• vrfCoordinatorMock and adding mocks
• LinkToken and Mocks
• Successful Ganache Deployment!
• Python Lottery Scripts/Functions
• start_lottery
• Brownie tip: Remember to tx.wait(1) your last transaction
• enter_lottery
• end_lottery
• Funding with LINK
• brownie interfaces
• Waiting for callback
• Integration Tests & Unit Tests
• Test all lines of code
• test_get_entrance_fee
• pytest.skip (again)
• test_cant_enter_unless_started
• test_can_start_and_enter_lottery
• test_can_pick_winner_correctly
• Events and Logs
• callBackWithRandomness

Lesson 9: ERC20s, EIPs, and Token Standards

• ERC20/EIP20 Standard
• What is an ERC20?
• Creating an ERC20
• OpenZeppelin ERC20
• Solidity 0.8
• I Challenge you to code this yourself!
• deploy_token.py
• Copy paste helpful_scripts.py
• Viewing our token in metamask
• Adding to an exchange

Lesson 10: Defi & Aave

Defi Intro

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

Aave UI

• Kovan ETH
• What is Aave?
• Borrowing and Lending
• Connecting to Aave
• Depositing Tokens / Lending
• Checking your transaction is correct
• WETH Gateway
• Interest Bearing Token (aToken)
• Collateral
• DAI
• Stablecoin
• Wrapped Bitcoin (wBTC)
• Why borrow tokens?
• Blockchain Fintech Tutorial
• DISCLAIMER ABOUT BORROWING
• Borrowing Tokens
• Liquidations
• Your health factor must be above 1
• Solvent
• Stable vs Variable Interest Rate
• Repaying our borrows/loans
• Reward token / governance token
• Governance

Programmatic Interactions with Aave

• Quant Defi Engineer
• Aave Documentation
• Setup
• Converting ETH -> WETH
• get_weth.py
• IWETH
• Kovan WETH Token Address: 0xd0a1e359811322d97991e03f863a0c30c2cf029c
• Mainnet WETH Token Address: 0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
• Converting WETH -> ETH with withdraw
• aave_borrow.py
• LendingPool
• LendingPoolAddressProvider
• LendingPool and LendingPoolAddressProvider Addresses
• Fixing import dependencies
• Aave Github
• ERC20 Approve Function
• IERC20 from Patrick’s repo
• deposit
• getUserAccountData
• Liquidation Threshold
• Risk Parameters
• Borrowing DAI
• Getting DAI Conversion Rate
• Chainlink Price Feeds
• AggregatorV3Interface
• borrow
• Mainnet DAI Address: 0x6b175474e89094c44da98b954eedeac495271d0f
• Aave Testnet Token Addresses
• Repaying
• Kovan Run
• Viewing the transactions

Lesson 11: NFTs

Non-Technical Explainer

• End-to-end article
• What is an NFT?
• ERC721
• Token URI
• Token Metadata Example
• IPFS

Simple NFT

• brownie mix
• Initial Setup
• SimpleCollectible.sol
• OpenZeppelin ERC721
• Pug Image
• NFT Constructor
• NFT is a type of factory pattern
• createCollectible
• _safeMint
• TokenURI & Metadata
• Opensea listing example
• Is this decentralized?
• Ethereum Size and dStorage
• Ethereum Size
• dStorage Solutions
• IPFS
• You need to have your NFT attributes both on-chain and inside your tokenURI metadata
• deploy_and_create.py
• TokenURI used for the demo: https://ipfs.io/ipfs/Qmd9MCGtdVz2miNumBHDbvj8bigSgTwnr4SbyH6DNnpWdt?filename=0-PUG.json
• IPFS Companion
• Rinkeby Deployment
• Opensea Example

Advanced deploy_and_create

• Move OPENSEA_URL to helpful_scripts
• Deploying AdvancedCollectible
• Opensea testnet is only compatible with Rinkeby
• Rinkeby Chainlink VRF Contract Addresses
• Speeding through adding functions from previous projects
• Deploy to Rinkeby
• create_collectible.py
• A quick unit test
• A quick integration test

Creating Metadata & IPFS

• create_metadata.py
• get_breed
• Metadata Folder
• metadata_template
• NFT Metadata Attributes
• Checking if Metadata file already exists
• Uploading to IPFS
• upload_to_ipfs
• Download IPFS Command Line
• Download IPFS Desktop
• HTTP IPFS Docs
• ipfs daemon
• Pinata
• Pinata Docs
• Refactoring to not re-upload to IPFS
• Setting the TokenURI
• End-To-End Manual Testnet Test
• Viewing on Opensea

Lesson 12: Upgrades

Introduction to upgrading smart contracts

• Smart Contracts can be upgraded!
• Does this mean they are not immutable?
• Trail of Bits on Upgradeable Smart Contracts
• The “Not Really Upgrading” / Parameterization Method
• The Social Yeet / Migration Method
• Contract Migration
• Proxies
• DelegateCall
• Terminology:
• Implementation Contract
• Proxy Contract
• User
• Admin
• Gotchas:
• Storage Clashes
• Function Selector
• Function Selector Clashes
• Proxy Patterns:
• Transparent Proxy Pattern
• Universal Upgrade Proxy Standard
• Diamond/Multi-Facet Proxy

Upgrades-mix and code

• • Setup
  • Box.sol
  • BoxV2.sol
  • Getting the proxy contracts
  • Openzeppelin Proxy Github
  • 01_deploy_box.py
  • Hooking up a proxy to our implementation contract
  • Initializers
  • Encoding Initializer Function
  • Assigning ABI to a proxy
  • Running the script
  • Upgrade Python Function