A simple JS library for building ERC-4337 UserOperations.

🚀 Looking for access to hosted infrastructure to build your Smart Accounts? Check out stackup.sh!

See the userop documentation at docs.stackup.sh.

Steps for setting up a local dev environment for contributing to userop.js.

• Node >=18.0.0
• ERC-4337 Devnet running

Install dependencies:

yarn install

Run tests:

yarn test

Distributed under the MIT License. See LICENSE for more information.

Feel free to direct any technical related questions to the dev-hub channel in the Stackup Discord.