[#XOnlyPubKey-IsFullyValid]
= xref:XOnlyPubKey.adoc[XOnlyPubKey]::IsFullyValid
:relfileprefix: ../
:mrdocs:

Determine if this pubkey is fully valid&period; This is true for approximately 50% of all possible 32&hyphen;byte arrays&period; If false, VerifySchnorr, CheckTapTweak and CreateTapTweak will always fail&period;

== Synopsis

Declared in `&lt;pubkey&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
IsFullyValid() const;
----

== Return Value

true if this is a fully valid x&hyphen;only public key&period;


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