ETH-Crash-Course: Module 4 — Foundry

Welcome to Module 4 of the ETH-Crash-Course! Now that you know how to write a smart contract in Solidity, it’s time to look at the enterprise-grade toolchain used by the world's top Web3 engineers to compile, test, deploy, and verify their code: Foundry. In this video, we break open the complete smart contract development lifecycle. Built in Rust, Foundry provides a blazing-fast, Ethereum-native development workflow. You will learn how to initialize projects, manage dependencies, write your first automated test scripts, run an ephemeral local node, safely handle private keys, and push your code out to the public Sepolia testnet! 🔗 Essential Links: Sign up for Live Classes: https://luma.com/9hyzpvth Main Course Repo: https://github.com/SM-Web-Systems/eth-crash-course Module 4 Detailed Notes: https://github.com/SM-Web-Systems/eth-crash-course/blob/main/Modules/Module4.md Presentation Slides: https://www.slideshare.net/slideshow/eth-crash-course-ethereum-from-zero-to-smart-contracts-module-4-foundry/287332017 ⏳ Video Chapters: (Note: You can tweak these timestamps slightly to match your final video timeline runtime perfectly) 00:00 - Intro: The Smart Contract Lifecycle 00:35 - What is Foundry? (Why it Beats Hardhat & Truffle) 01:15 - One-Line Installation with foundryup 02:35 - Structure of a Foundry Project (src, test, script, lib) 03:40 - Compiling Smart Contracts with forge build 04:50 - Introduction to Testing Foundations (forge test) 06:50 - Local Development: Running a Local Blockchain Node with anvil 07:48 - Automated Deployments via Solidity Deployment Scripts 09:05 - Local vs. Testnet Deployment Paths (Anvil vs. Sepolia) 10:55 - Interacting via CLI with cast call and cast send 11:48 - Verifying Smart Contracts on Etherscan with forge verify-contract 12:45 - Secure Private Key Management via cast wallet import 🧠 Key Tools Explored in This Lesson: Forge: Compile, build, test, and safely deploy your code using Solidity-native scripts instead of JavaScript/TypeScript setups. Cast: The ultimate command-line utility to sign transactions, decode data, interact with smart contracts, and check raw state variables. Anvil: A blazing-fast local Ethereum node ideal for rapid smoke-testing and staging frontends locally. 🧪 Mini-Challenge for the Comments: Look at how we executed the Etherscan verification process at the end of the video. 👉 Why is verifying your source code on block explorers considered a non-negotiable step before launching a dApp for production users? Share your thoughts below! Make sure to Like, Subscribe, and hit the Notification Bell so you don't miss Module 5, where we will dive into advanced testing frameworks, assertions, failure states, and fuzz testing inside Foundry!