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  • INTRODUCTION
  • LEARN
    • Espresso in the Modular Stack
    • The Espresso Network
      • System Overview
      • Properties of HotShot
        • EspressoDA
          • How It Works
      • Interfaces
        • Espresso ↔ Rollup
        • Espresso ↔ L1
        • Rollup ↔ L1
      • Internal Functionality
        • Espresso Node
        • Light Client Contract
        • Fee Token Contract
        • Stake Table
          • How the Stake Table Contract Works
        • Smart Contract Upgradeability
    • Rollup Stacks
      • Integrating a ZK Rollup
        • ZK Rollup Architecture
        • Using Espresso
        • Summary of Changes
      • Integrating an Optimistic Rollup
        • Optimistic Rollup Architecture
        • Using Espresso
        • Summary of Changes
  • Guides
    • Using the Espresso Network
      • Integrating Arbitrum Orbit Chain
        • Quickstart with Arbitrum Nitro Rollups
        • Reading Confirmations from the Espresso Network
        • Arbitrum Nitro Integration Overview
          • Using TEE with Nitro
          • Arbitrum Nitro Trust & Liveness Dependencies
        • Migrating Arbitrum Orbit Chains to Espresso
          • Arbitrum Testnet
            • Nitro Testnet
            • Local Deployment (`docker compose`)
      • Using the Espresso Network as a Cartesi application
    • Running an Espresso Node
    • Running a Builder
    • Bridging with the Espresso Network
  • API Reference
    • Espresso API
      • Status API
      • Catchup API
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      • State API
      • Events API
      • Submit API
      • Earlier Versions
        • v0
          • Status API
          • Catchup API
          • Availability API
          • Node API
          • State API
          • Events API
          • Submit API
    • Builder API
  • Releases
    • Mainnet 1
      • Running a Mainnet 1 Node
      • Contracts
      • Rollup Migration Guide
    • Mainnet 0
      • Running a Mainnet 0 Node
      • Contracts
    • Testnets
      • Decaf Testnet Release
        • Running a Node
        • Contracts
      • Cappuccino Testnet Release
        • Running a Node
        • Deploying a Rollup on Cappuccino
        • Benchmarks
      • Gibraltar Testnet Release
        • Interacting with Gibraltar
        • Arbitrum Nitro integration
        • Deploying a Rollup on Gibraltar
      • Cortado Testnet Release
        • Interacting with Cortado
        • OP Stack Integration
          • Optimism Leader Election RFP
      • Doppio Testnet Release
        • Interacting with Doppio
        • Polygon zkEVM Stack Integration
        • Minimal Rollup Example
        • Benchmarks
      • Americano Testnet Release
  • Appendix
    • Interacting with L1
      • Trustless Sync
      • Fork Recovery
      • Bridging
    • Glossary of Key Terms
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Cappuccino Testnet Release

Espresso testnet 5 (Cappuccino)—May 2024

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Last updated 6 months ago

With the release of , Espresso's persistent testnet, the Cortado testnet is currently paused.

In May 2024, we announced the Cappuccino release of Espresso.

Cappuccino continues the process of decentralizing Espresso, by onboarding a total of 10 operators to participate in Cappuccino. The 10 operators will be running a total of 100 geographically distributed nodes, all participating in HotShot together.

The Tiramisu DA layer is now also further upgraded and supports VID, which ensures that data is recoverable, even if the CDN and DA committee fail to be responsive.

As part of the Arbitrum tech stack integration, Espresso now supports Arbitrum Nitro fraud proofs, which enables Arbitrum chains to be fully productized on top of Espresso. We will be releasing test versions of Arbitrum Orbit chains in collaboration with Caldera and AltLayer.

We have also implemented a simple block builder for Cappuccino. This lays the foundation for shared sequencers elected through the Espresso marketplace to build valuable multi-rollup blocks and give out atomic execution guarantees for cross-chain transactions. You can track activity on the Cappuccino testnet in our new block explorer here: And you can interact with Cappuccino via the public endpoint here:

Decaf
https://explorer.cappuccino.testnet.espresso.network/
https://query.cappuccino.testnet.espresso.network/v0/