Bubs testnet ​

Bubs Testnet was the first OP Stack testnet with Celestia underneath hosted by Caldera with support from Celestia Labs. Bubs was dedicated to providing developers with an EVM-compatible execution layer to deploy their EVM applications on.

Built with the OP Stack and Celestia ​

The Bubs Testnet was a testnet rollup, a modified version of optimism-bedrock that uses Celestia as a data availability (DA) layer. This integration can be found in the @celestiaorg/optimism repository. The testnet was hosted by Caldera, who makes it easy to launch rollups with no code required. Bubs' data was posted to Celestia on the Mocha testnet. View the namespace for Bubs on Celestia's Mocha testnet.

Learn more about the setup of the integration in the introduction.

Building on Bubs ​

Bubs Testnet provides a robust environment for developers to test their Ethereum Virtual Machine (EVM) applications. It offers an EVM-compatible execution layer, making it an ideal platform for developers looking to build and test applications in a setting that closely mirrors an OP Stack rollup on Celestia.

Next steps ​

Now that you understand how Bubs Testnet integrated OP Stack with Celestia, you can explore current testnet options like Gelato's Raspberry testnet.