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

Determine whether a Miniscript node is satisfiable. fn(node) will be invoked for all key, time, and hashing nodes, and should return their satisfiability.

== Synopsis

Declared in `<script/miniscript.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename F>
bool
IsSatisfiable(F fn) const;
----

== Return Value

True if the whole expression is satisfiable.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *fn*
| Predicate invoked on each key, time, and hashing node to report its satisfiability.
|===


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