Deferred

A deferred step that is resolved at complete time when UTxOs are available.

The query specifies which UTxOs to fetch (used by complete(reader, sponsor)). The resolve function receives the fetched UTxOs and returns concrete steps to insert in place of the deferred step.

For complete(utxos, sponsor), the full provided UTxO set is passed to resolve (the query is not evaluated locally).

Deferred steps are not supported by build — they must be resolved before building.