Request for Grant Proposals: Application State Migration

[damian-straszak]

Proposal from Cardinal Cryptography:

Secure Turnstile: Application State Migration Pattern | Cardinal Cryptography

Summary This proposal presents a reusable pattern for application-level state migration during Aztec rollup upgrades. Users migrate private state (token balances, NFT ownership, identity attestations) to new rollup instances without per-user L1 transactions. The mechanism uses Aztec’s existing infrastructure: archive roots published to L1 become the trust anchor for proving historic state on the new rollup. For identity binding, users prove ownership via knowledge of the master nullifier secret…