Odaily Planet Daily News Blockchain infrastructure company Espresso Systems announced that the Polygon zkEVM fork running on the Espresso Cortado test network was resumed last night and is ready for use. The team is still conducting further testing before asking Caldera to redeploy the Vienna OP chain, but the goal is to be back online tomorrow.
Yesterday, Espresso Systems announced that it had discovered and fixed some vulnerabilities in the Espresso Sequencer consensus supporting the Cortado testnet. The testnet has been shut down while the team prepares and deploys fixes. The above vulnerability is contained in Espresso Sequencer and is not related to Vienna deployed by Caldera OP Stack.