useTokenOf

Resolve the token the factory recorded for an airdrop instance at create - what fundAirdrop pulls, regardless of what the instance reports today.

A zero address means the instance did not come from this factory.

Cached indefinitely once non-zero: the mapping is written once, inside createX. A zero answer (not created yet, or not from this factory) is not cached forever: it stays stale and refetches on the next mount, focus or refetch, because the address can be created later by another tab, a server or the headless client, none of which reaches a hook invalidation. The create hooks in this subpath also invalidate this key for the address they deploy, so a zero already on screen updates immediately; the per-result staleTime covers every other create path, the same policy as useIsAirdrop. Override through query.staleTime.