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

Test whether this is the 0 key (the result of default construction)&period; This implies !IsFullyValid()&period;

== Synopsis

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

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

== Return Value

true if the key data is all zero&period;


[.small]#Created with https://www.mrdocs.com[MrDocs]#
