[#SigningProvider-GetKeyByXOnly]
= xref:SigningProvider.adoc[SigningProvider]::GetKeyByXOnly
:relfileprefix: ../
:mrdocs:

Look up a private key by any key id derived from an x‐only pubkey.

== Synopsis

Declared in `<script/signingprovider.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
GetKeyByXOnly(
    xref:XOnlyPubKey.adoc[XOnlyPubKey] const& pubkey,
    xref:CKey.adoc[CKey]& key) const;
----

== Return Value

True if a private key was found.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *pubkey*
| The x‐only pubkey whose keys are searched.
| *key*
| Set to the matching private key on success.
|===


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