[#MutableTransactionSignatureCreator-CreateMuSig2Nonce]
= xref:MutableTransactionSignatureCreator.adoc[MutableTransactionSignatureCreator]::CreateMuSig2Nonce
:relfileprefix: ../
:mrdocs:

Create a MuSig2 public nonce for the given participant.

== Synopsis

Declared in `<script/sign.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
std::vector<uint8_t>
CreateMuSig2Nonce(
    xref:SigningProvider.adoc[SigningProvider] const& provider,
    xref:CPubKey.adoc[CPubKey] const& aggregate_pubkey,
    xref:CPubKey.adoc[CPubKey] const& script_pubkey,
    xref:CPubKey.adoc[CPubKey] const& part_pubkey,
    xref:uint256.adoc[uint256] const* leaf_hash,
    xref:uint256.adoc[uint256] const* merkle_root,
    xref:SigVersion.adoc[SigVersion] sigversion,
    xref:SignatureData.adoc[SignatureData] const& sigdata) const override;
----

== Return Value

The serialized public nonce, empty on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *provider*
| The source of keys and MuSig2 session state.
| *aggregate_pubkey*
| The aggregate public key of the MuSig2 group.
| *script_pubkey*
| The output key the aggregate key is tweaked to.
| *part_pubkey*
| The participant public key generating the nonce.
| *leaf_hash*
| The tapleaf hash for a script path spend, or null.
| *merkle_root*
| The Taproot merkle root, or null for a key path spend.
| *sigversion*
| The signature serialization version to use.
| *sigdata*
| Signature data providing context for the input.
|===


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