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

Check whether there is no duplicate key across this fragment and all its sub‐fragments.

== Synopsis

Declared in `<script/miniscript.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
CheckDuplicateKey() const;
----

== Return Value

True if no key is duplicated within this fragment or its subfragments.


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