We’re excited to release the first version of the SBC paymaster. We’ve developed the SBC paymaster to make it easy for developers to implement gasless transactions.

Implementation

The implementation of our paymaster is consistent with the ERC-4337 standard. It implements a bundler and paymaster service that connect to the v0.7 EntryPoint contract.

For technical details, please refer to our blogs about building and deploying a custom paymaster. We also provide an overview of the paymaster and example implementations in our documentation.

Usage

We’ve incorporated the bundler and paymaster into a single API endpoint using an account abstraction proxy contract. Pointing a single URL to point to both the bundler and paymaster simplifies its usage.

You’ll use a URL that looks like this:

https://api.aa.stablecoin.xyz/rpc/v1/:chain/:apiKey

Where chain refers to a chain name from viem (e.g. Base) and apiKey refers to the API key from us. We currently provide support for Base.

Try it out

If you’d like to try out our paymaster in an application you’re building, please reach out to us on Telegram. We’ll get you set up with an API key to try it out. And we’d like to offer to cover gas fees for SBC transactions if used with your apps for early users of the paymaster.

We’ve open-sourced the paymaster service and provide instructions for how to deploy it locally for development. Check it out and follow along as we add features and make updates, especially with the Pectra upgrade coming soon.