[#DeriveExtKey]
= DeriveExtKey
:mrdocs:

Get extended key and origin info for a given path

== Synopsis

Declared in `<key.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::optional<std::pair<CExtKey, KeyOriginInfo>>
DeriveExtKey(
    xref:CExtKey.adoc[CExtKey] const& ext_key,
    std::vector<uint32_t> const& path);
----

== Return Value

the resulting extended private key and origin info

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ext_key* [in]
| The extended private key to derive from
| *path* [in]
| The BIP 32 path
|===


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