Terminology

• Web3: In general means blockchain tech with some purpose
• Ethereum: The blockchain we will we be developing with
• Provider: From Ethers docs:

"A Provider abstracts a connection to the Ethereum blockchain, for issuing queries and sending state changing transactions."

• Contract: This is code written in Solidity that has been compiled and deployed onto a network. It has an address that is no different than a wallet address.
• Wallet: The blockchain, its a private + public key combo (really you just need a private key).
• BTW: The ability to tell someone that you know something that they likely don't, or you use some obscure technology
  • Let me give you an example:
    • I use vim, BTW.
    • I type with dvorak, BTW.
    • I write CLI programs with Rustlang, BTW

Technology

• ethers: import { ethers } from "ethers";. This is lib that abstracts the complication of communication.
• hardhat: Its backbone of any project these days. It provides compiling, testing, and deployment support.
  • When you get a getContractFactory("HelloWorld") it actually just loads the file from the json build file.
• metamask: Its a browser plugin for wallets. "The Defacto Standard"

You will notice that in the code on the web I don't reference hardhat. That is because hardhat is a support lib.

Whiteboard time

Boxes and arrows how ethereum development effectively works

Questions?

• Yes we will make another contract right after this.
• I am not going to be able to answer everything.