Modern, opinionated, and gas optimized building blocks for smart contract development.

A compilation of patterns and best practices for the smart contract programming language Solidity

Seaport is a marketplace protocol for safely and efficiently buying and selling NFTs.

A practical example on how to perform sandwich attacks on Ethereum

The smart contract security training ground for developers, security researchers and educators.

Simple, intentionally-limited versions of web3 protocols & apps.

Multicall: Aggregate multiple constant function call results into one

Collection of smart contracts deployable via thirdweb

A collection of helpful contracts and libraries for use with Forge and Foundry

A book on all things Foundry, available at https://book.getfoundry.sh.

🔑🔑🔑 next generation token approvals mechanism

Accelerate your onchain creativity with the Build Onchain Apps Template. ⛵️

Foundry-based template for developing Solidity smart contracts

Playpen is a set of modern, gas optimized staking pool contracts.

A data structures library that does memory management for you

💸 Write web apps in Solidity — a Solidity web framework / a proof-of-concept implementation of HTTP over Ethereum.

A CTF protocol, where players create and solve EVM puzzles to earn NFTs.

Off-the-shelf Solidity smart contracts

📜 "Coinbase Verifications" is a set of Coinbase-verified onchain attestations that enable access to apps and other onchain benefits.

Gas efficient routers for L2 applications

Lean ERC20 token with gasless streaming to any wallet

Verifiable Random Function (VRF) library written in Solidity

standardized framework to simulate governance proposals with forge

Code snippets as given in Ethereum Cookbook

Solidity contracts and tests used to benchmark performance of fuzzers

Work towards a trust-minimized (one day trustless) token swapper. Currently: OnChainPricing & Cowswap Contract Swapper. One day: Automatic Limit Order Swap Protocol. Moved to Badger Repo