[#CExtKey-2constructor-0b]
= xref:CExtKey.adoc[CExtKey]::CExtKey
:relfileprefix: ../
:mrdocs:

Constructors

== Synopses

Declared in `<key.h>`

Construct an empty extended key.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:CExtKey/2constructor-07.adoc[CExtKey]() = default;
----

[.small]#xref:CExtKey/2constructor-07.adoc[_» more..._]#

Construct an extended key from an extended public key's metadata and a private key.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:CExtKey/2constructor-0e.adoc[CExtKey](
    xref:CExtPubKey.adoc[CExtPubKey] const& xpub,
    xref:CKey.adoc[CKey] const& key_in);
----

[.small]#xref:CExtKey/2constructor-0e.adoc[_» more..._]#

== Parameters

[cols="1,4"]
|===
| Name| Description
| *xpub*
| The extended public key providing depth, fingerprint, child index and chain code.
| *key_in*
| The private key material.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#