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Foundry

a portable, fast, and modular toolkit� for Ethereum application development, �written in Rust.

georgios@paradigm.xyz

@gakonst

https://github.com/foundry-rs

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Foundry

a portable, fast, and modular toolkit� for Ethereum application development, �written in Rust.

georgios@paradigm.xyz

@gakonst

https://github.com/foundry-rs

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The Problem

  • Context Switching
    • Solidity contracts
    • JS/TS/Python tests
    • Too much to learn / remember
  • Speed/Productivity
    • Compilation + Testing take >15-20s, or even minutes
    • >20s → minutes, I just alt tab to Twitter
    • Slow forking mode
  • Security
    • Fuzzing requires too much setup
    • Hard to modify EVM state to explore more codepaths
  • High overhead to install across platforms

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..also js bignumber

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The Solution

  • Solidity tests
    • no context switching
    • write in 1 language
    • no new testing syntax
  • Intuitive property-based testing
  • VM State Overriding
  • Optimized compilation + testing pipeline
    • aggressive caching + pruning of dep graph
    • compile tests + app code together/in parallel
    • Fast Rust EVM
  • Runtime observability + debugging
  • <15MB cross-platform binaries

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aka Foundry

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Does anyone care?

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Does anyone use this?

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Wide ecosystem + contributor set

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Easy to install: Foundryup

https://book.getfoundry.sh/getting-started/installation.html

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Fast Compilation pipeline

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Fast Testing + Forking

..and >16x vs Hardhat on @uniswap/v3-periphery

https://github.com/mds1/convex-shutdown-simulation

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Solidity Tests

https://book.getfoundry.sh/forge/writing-tests.html

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Intuitive property based testing / fuzzing

https://book.getfoundry.sh/forge/fuzz-testing.html

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Invariant Testing / Multi-step Fuzzing

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VM State Overrides aka Cheatcodes

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Runtime Introspection: Call Traces

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Runtime Introspection: Interactive Debugger

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Runtime Introspection: Gas Reports

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When Coverage?

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Coverage!

https://mirror.xyz/devanon.eth/RrDvKPnlD-pmpuW7hQeR5wWdVjklrpOgPCOA-PJkWFU

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Chain Ops / Solidity Scripting

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Chain Ops & tests go multichain

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Formatting: forge fmt

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Anvil: A drop-in ganache-cli / hardhat node replacement

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Hardhat Plugin: Speed improvements for free

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Mandatory shoutout

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Mandatory shoutout

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Next few months…

..Not much! We’re almost feature complete.

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  • Release v0.3 (next ~2 weeks, fixing edge cases)
  • Release v1.0 (next ~2 months, figuring out checklist)
  • Performance / stability improvements
  • Prioritize v2.0 features (more languages?)

It’s good! Try it out if you haven’t :)

Docs: https://book.getfoundry.sh/

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Thank you for your attention!

Q&A?�https://getfoundry.sh/

https://github.com/foundry-rs

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georgios@paradigm.xyz

@gakonst