[Solidity] 230308 study

Some contents of this article are based on Cryptozombies’s source code, based on GPL-3.0

Lesson 6

Chapter 1: Intro to Web3.js

• Ethereum nodes only speak a language called JSON-RPC
• Include web3.js in index.html

Chapter 2: Web3 Providers

Chapter 3: Talking to Contracts

• Address, ABI, then Instantiating

Chapter 4: Calling Contract Functions

• call: for view, pure function
  • local only
  • does not create transaction on blockchain
• send
  • creates transaction on blockchain –> we should pay gas fee