Foundry Seminar

join the dev telegram: https://t.me/foundry_rs join the support telegram: https://t.me/foundry_support

Agenda

wtf is foundry and y it's dope
quick setup
writing tests
fuzzing in foundry & why it's valuable
using traces
using the debugger
future of foundry
Q&A

Intro

wtf is foundry

"Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust."

Has 2 core utilities:

forge
cast

forge is primarily what we will cover today, it is an Ethereum smart contract testing framework, like Truffle, Hardhat, and dapptools.

cast is a collection of utilities for interacting with smart contracts, endcoding, decoding, and understanding EVM ecosystem semantics.

why foundry is dope

Think about any language you have ever written -- did you write your tests in another language? How can you expect to master a language when you spend sometimes greater than half your development time writing in another language?

This is one of the core problems foundry aims to solve: write your tests in the same language as your production software.

Context switching also reduces productivity; being able to stay in solidity can speed up development. Speaking of speed, foundry is fast. Really freakin' fast. The benchmarks below are even a little outdated (we got faster :)).

Project	Forge	DappTools	Speedup
guni-lev	28.6s	2m36s	5.45x
solmate	6s	46s	7.66x
geb	11s	40s	3.63x
vaults	1.4s	5.5s	3.9x

And it is only getting faster. A new evm backend is being integrated right now and early benchmarks have it close to a 50% speedup.

cool features

FAST
mainnet forking
cheatcodes
debugger
traces
fuzzing
multi compiler version support

LETS HOP IN!

Repo will be available after the talk.

Install & Setup

curl -L https://foundry.paradigm.xyz | bash foundryup forge init foundry_seminar

Feel free to follow along :)