[#miniscript-Node-GetWitnessSize]
= xref:miniscript.adoc[miniscript]::xref:miniscript/Node.adoc[Node]::GetWitnessSize
:relfileprefix: ../../
:mrdocs:

Return the maximum size in bytes of a witness to satisfy this script non‐malleably. Note this does not include the witness script push.

== Synopsis

Declared in `<script/miniscript.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::optional<uint32_t>
GetWitnessSize() const;
----

== Return Value

The witness size in bytes, or std::nullopt if no satisfaction exists.


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