Crosschain State Without the Multisig | Danish (nodestarQ) (Berlin Ethereum Day, June 2026)

Wed, Sep 2, 2026, 12:00 AM

Most crosschain apps quietly add a multisig, an MPC committee, or an optimistic oracle on top of otherwise-trustless rollups, silently downgrading every user's security model. They don't have to. Crosschain state can be built using only canonical L1 and L2 messaging plus ZK proofs over a shared root: slower than committee bridges, but with the same security profile as the underlying rollups. No new validators, no new trust assumptions, exit windows intact. Danish/nodestarQ (warptoad) walked through the design pattern and grounded it in warptoad, a unified-anonymity-set privacy bridge across Ethereum L1, Scroll, and Aztec, where every withdrawal is a ZK proof against a single aggregated GigaRoot. The Berlin Ethereum Day was a one-day event held on June 15, 2026, during the Berlin Blockchain Week, bringing together speakers from the Ethereum Foundation and the broader FOSS, privacy, and security ecosystems to explore the future of Ethereum and self-sovereign technologies - from technical direction and core values to the challenges and opportunities ahead. Future Meetups and Events: https://www.meetup.com/berlin-ethereum-meetup/ More information on the speakers and the agenda: https://berlinethereumday.com/