Lesson 1 - Introduction

Wallets and transactions

• What is a wallet
• What wallets are out there
• Using metamasks
• Creating a public-private key pair
• Connecting to Goerli testnet
• Funding via a Faucet
• Sending a ETH transaction

How ethereum works

• Explaining Etherscan
• Transactions
• Gas
• Blocks
• Consensus and finality
• State changes
• The EVM
• Accounts

Trying it out

• How uniswap works (briefly)
• See contract on etherscan (briefly)
• Make a swap

Contract interaction: Token Swap

• What is a state change inside a smart contract operation

Hands on - Remix

• Remix interface (overview)

References

https://remix-ide.readthedocs.io/en/latest/

Coding HelloWorld.sol

• Solidity philosophy
• OOP basics of Solidity
• Contract Structure
  • SPDX License Identifier
  • Pragmas
  • Imports
  • Comments
  • Contract definition
• Variables
• Storage areas
  • Account storage
  • Memory
  • Stack
• Constructor function
• Functions
• Visibility
• Typing
• Return values

Code Reference

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0 <0.9.0;
contract HelloWorld {

    constructor() {}

    function helloWorld() public view returns (string memory) {}
   
}

References

https://docs.soliditylang.org/en/latest/

Compiling and deploying

• Compilation parameters
  • Compiler version
  • EVM Version
  • Optimization
• Bytecode
• ABI
• Deployment parameters
  • Environment
  • Account
  • Gas
  • Contract
• Attaching
• Deploying

Homework

• Create Github Issues with your questions about this lesson
• Read introduction and topics table from references