[#XOnlyPubKey-begin-00]
= xref:XOnlyPubKey.adoc[XOnlyPubKey]::begin
:relfileprefix: ../
:mrdocs:

Mutable iterator to the first byte of the key data.

== Synopsis

Declared in `<pubkey.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
unsigned char*
begin();
----

== Return Value

A mutable iterator to the first byte of the key data.


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