Deploy your smart contract to the same address on many blockchains (with fewer pitfalls)

React components and TypeScript utilities to help you build top-tier onchain apps.

Share a seedphrase, earn $SBUX

Display an embedded cast from Farcaster in your React app. Works with Next.js SSR.

A fully open source, self-hostable Twitter flavoured Farcaster client

A customizable audio player that you can embed in your site

Github EAS Attestation Action

Find ways to contribute to the Optimism Collective

core contract of eip 4337 implementation

Created with CodeSandbox

Variable Rate Gradual Dutch Auctions.

Guess ABI of any Ethereum contract, even if it is not verified on Etherscan.

Solidity CRUD Library

A permissionless, open-source, modular smart contract framework for efficient creation of digital collectibles by musicians, artists, and creators.

Ethereum Proof-of-Stake Consensus Specifications

Minimal Anti-Collusion Infrastructure (MACI)

Optimized Solidity snippets.

Louper V2

A private and non-repudiable reputation system

XMTP client SDKs for JavaScript applications.

Core components to use layer 2 smart contract wallets with the BLS signature scheme

Private airdrops for Ethereum.

An reference implementation of Gradual Dutch Auctions. GDAs enable the efficient sale of assets that do not have liquid markets.

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