[#mempoolentry_wtxid-operator_call-00]
= xref:mempoolentry_wtxid.adoc[mempoolentry&lowbar;wtxid]::operator()
:relfileprefix: ../
:mrdocs:

Returns the wtxid of the given transaction&period;

== Synopsis

Declared in `&lt;txmempool&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:mempoolentry_wtxid/result_type.adoc[result&lowbar;type]
operator()(xref:CTransactionRef.adoc[CTransactionRef] const& tx) const;
----

== Return Value

The witness hash (wtxid) of the transaction&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *tx*
| The transaction to hash&period;
|===


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