Lesson 4: Remix Fund Me

⌨️ (03:31:55) Lesson 4: Remix Fund Me

💻 Code: https://github.com/PatrickAlphaC/fund-me-fcc

Introduction

Sending ETH Through a Function & Reverts

• Fields in a Transaction
• More on v,r,s
• payable
• msg.value & Other global keywords
• require
• revert

Chainlink & Oracles

• 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

Review of Sending ETH and working with Chainlink

Interfaces & Price Feeds

• Chainlink Price Feeds (Data Feeds)
• Chainlink GitHub
• Interface

Importing from GitHub & NPM

• Chainlink NPM Package

Floating Point Math in Solidity

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

Basic Solidity: Arrays & Structs II

• msg.sender

Review of Interfaces, Importing from GitHub, & Math in Solidity

Libraries

• Library
• Solidity-by-example Library

SafeMath, Overflow Checking, and the "unchecked" keyword

• Openzeppelin Safemath
• unchecked vs. checked

Basic Solidity: For Loop

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

Basic Solidity: Resetting an Array

Sending ETH from a Contract

• Transfer, Send, Call
• this keyword

Basic Solidity: Constructor

• Constructor

Basic Solidity: Modifiers

• Double equals
• Modifier

Testnet Demo

• Disconnecting Metamask

Advanced Solidity

Immutable & Constant

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

Custom Errors

• Custom Errors Introduction

Receive & Fallback Functions

• Solidity Docs Special Functions
• Fallback
• Receive

Lesson 4 Recap

🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊 Completed Solidity Basics! 🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊🎊