ERC-4337 is a standard for higher level infrastructure for account abstraction on Ethereum. A bundler serves to package user operations and submits them on-chain. 

Voltaire is an open-source bundler implementation written in python. It serves as a critical piece for building censorship resistant smart contract wallets with ERC-4337. If any participating bundler in the [unified ERC-4337 mempool](https://notes.ethereum.org/@yoav/unified-erc-4337-mempool) network censor a contract, there is an incentive for anyone to run a bundler and capture the profits of this contract’s users. 

By building and maintaining Voltaire, we contribute to achieving a resilient p2p network of bundlers, where any smart contract wallet user can send their user operation too. 