[#HidingSigningProvider-GetMuSig2SecNonce]
= xref:HidingSigningProvider.adoc[HidingSigningProvider]::GetMuSig2SecNonce
:relfileprefix: ../
:mrdocs:

Retrieve the MuSig2 secret nonce for a signing session.

== Synopsis

Declared in `<script/signingprovider.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
std::optional<std::reference_wrapper<MuSig2SecNonce>>
GetMuSig2SecNonce(xref:uint256.adoc[uint256] const& session_id) const override;
----

== Return Value

A reference to the nonce, or std::nullopt if none is stored.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *session_id*
| The session id to retrieve the nonce for.
|===


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