OptionalsourceSource-version mutation key (idempotency_key, or v2.5 buyer_ref).
OptionalsellerSeller task handle retained after a submitted response.
OptionaldeferredSDK deferred-state token linked to this committed purchase operation.
OptionalcallbackBuyer callback-route operation id used for restart/replica settlement recovery.
OptionalpendingAuthenticated terminal callback durably queued before seller task binding.
OptionalpendingRenewable single-owner lease for publishing pendingSettlement.
OptionalacknowledgedStable proof that the pending settlement was published and acknowledged.
Callback-capable stores retain this through replayExpiresAt and return it
from both lookup methods after clearing pendingSettlement.
Secret-safe durable description of the claimed mutation.