[#CachingTransactionSignatureChecker-VerifySchnorrSignature]
= xref:CachingTransactionSignatureChecker.adoc[CachingTransactionSignatureChecker]::VerifySchnorrSignature
:relfileprefix: ../
:mrdocs:

Verify a Schnorr signature, using the cache when possible.

== Synopsis

Declared in `<script/sigcache.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
bool
VerifySchnorrSignature(
    std::span<unsigned char const> sig,
    xref:XOnlyPubKey.adoc[XOnlyPubKey] const& pubkey,
    xref:uint256.adoc[uint256] const& sighash) const override;
----

== Return Value

true if the signature is valid.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *sig*
| The Schnorr signature bytes.
| *pubkey*
| The X‐only public key to check against.
| *sighash*
| The signature hash that was signed.
|===


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