Voltaire is a modular and lightning-fast Python Bundler for Ethereum EIP-4337 Account Abstraction. It is designed to operate within the peer-to-peer mempool of user operations, facilitating the inclusion of transactions on-chain more quickly, at the frontier of efficiency. A good way to think about Voltaire is as software that delivers User Operations and cannot change them, similar to those expected of block-builders. It is incentivized to participate in the network through priority fees and MEV.
Voltaire presently has complete coverage of the compatibility test suites written by ERC-4337 team. These test suites ensure that different bundlers can communicate effectively and defend against DDoS attack vectors. While the specification is still under development, all upcoming updates will aim to sustain full compliance coverage.
Voltaire is open-source, meaning that anyone can launch Voltaire and capture User Operation profits. By participating in the network, the mempool becomes more robust when facing censorship attacks.