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

Create a Schnorr signature for the Taproot input.

== Synopsis

Declared in `<script/sign.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
bool
CreateSchnorrSig(
    xref:SigningProvider.adoc[SigningProvider] const& provider,
    std::vector<unsigned char>& sig,
    xref:XOnlyPubKey.adoc[XOnlyPubKey] const& pubkey,
    xref:uint256.adoc[uint256] const* leaf_hash,
    xref:uint256.adoc[uint256] const* merkle_root,
    xref:SigVersion.adoc[SigVersion] sigversion) const override;
----

== Return Value

True if the signature was created.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *provider*
| The source of keys used to sign.
| *sig*
| Filled with the produced Schnorr signature.
| *pubkey*
| The x‐only public key to sign with.
| *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.
|===


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