Note

Stores and persists the registry signature to skip verification and database updates when unchanged, updating controller logic and tests.

• Snaps Registry Controller (json.ts):
  • Add signature to SnapsRegistryState and controller metadata (persisted, logged; not exposed to UI).
  • Update flow: fetch registry.json and signature.json, parse signature; if signature matches state, skip verification/update and only refresh lastUpdated/databaseUnavailable.
  • On change, verify using parsed SignatureStruct and persist new database and signature.
  • Adjust #verifySignature to accept SignatureStruct (using @metamask/superstruct Infer).
• Tests (json.test.ts):
  • Add test ensuring update is skipped when signature unchanged; update metadata snapshots to include signature.
• Dependencies:
  • Add @metamask/superstruct.

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