[#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(0x7ff36cbf2a78), requires_capability(0x7ff379204fb8), requires_capability(0x7ff39283af98), requires_capability(0x7ff3833692b8), requires_capability(0x7ff38bd20e18), requires_capability(0x7ff392c20cd8), requires_capability(0x7ff36c1618e8), requires_capability(0x7ff381ccf438), requires_capability(0x7ff38d75c488), requires_capability(0x7ff36872d138), requires_capability(0x7ff3743a6e78)]]
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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