[#ChainstateManager-MaybeValidateSnapshot]
= xref:ChainstateManager.adoc[ChainstateManager]::MaybeValidateSnapshot
:relfileprefix: ../
:mrdocs:

Try to validate an assumeutxo snapshot by using a validated historical chainstate targeted at the snapshot block. When the target block is reached, the UTXO hash is computed and saved to `validated_cs.m_target_utxohash`, and `unvalidated_cs.m_assumeutxo` will be updated from UNVALIDATED to either VALIDATED or INVALID depending on whether the hash matches. The INVALID case should not happen in practice because the software should refuse to load unrecognized snapshots, but if it does happen, it is a fatal error.

== Synopsis

Declared in `<validation.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[requires_capability(0x7f2e1bc16e48), requires_capability(0x7f2e146b5198), requires_capability(0x7f2e298fa568), requires_capability(0x7f2e360b7cc8)]]
xref:SnapshotCompletionResult.adoc[SnapshotCompletionResult]
MaybeValidateSnapshot(
    xref:Chainstate.adoc[Chainstate]& validated_cs,
    xref:Chainstate.adoc[Chainstate]& unvalidated_cs);
----

== Return Value

The outcome of the snapshot validation attempt.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *validated_cs*
| The fully validated chainstate targeting the snapshot block.
| *unvalidated_cs*
| The snapshot chainstate whose validity is being confirmed.
|===


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