[#CBlockIndex-IsValid]
= xref:CBlockIndex.adoc[CBlockIndex]::IsValid
:relfileprefix: ../
:mrdocs:

Check whether this block index entry is valid up to the passed validity level.

== Synopsis

Declared in `<chain.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[requires_capability(0x7fb95cc63008), requires_capability(0x7fb97da0eb28), requires_capability(0x7fb969041018), requires_capability(0x7fb96e677868), requires_capability(0x7fb96bda92c8), requires_capability(0x7fb96a98f3a8), requires_capability(0x7fb97e605f88), requires_capability(0x7fb96f3e55a8), requires_capability(0x7fb958b0af48), requires_capability(0x7fb98541fa28), requires_capability(0x7fb9645578f8)]]
bool
IsValid(xref:BlockStatus.adoc[BlockStatus] nUpTo) const;
----

== Return Value

True if the entry has reached at least the given validity level and has not failed.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *nUpTo*
| The validity level to check against.
|===


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