Cortado Testnet Release

Espresso testnet 3 (Cortado)—September 2023

In September 2023, we announced the Cortado release of Espresso.

The primary highlight of the Cortado release is the integration of a second rollup stack with Espresso: the OP Stack. This integration is a direct result of the work that Espresso completed in developing a leader election interface for the OP Stack, for which Espresso was awarded an Optimism RFP in July 2023. Details on the OP Stack integration can be found here.

We've deployed a public Cortado testnet, integrated with two rollups of different stacks: an OP Stack rollup (called Vienna, deployed in collaboration with Caldera) and a Polygon zkEVM rollup. Instructions for interacting with this testnet can be found here.

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