[#wallet-CKeyMetadata]
= xref:wallet.adoc[wallet]::CKeyMetadata
:relfileprefix: ../
:mrdocs:

Metadata about a wallet key, such as its creation time and HD derivation info.

== Synopsis

Declared in `<wallet/walletdb.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class CKeyMetadata;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:wallet/CKeyMetadata/2constructor-0e.adoc[`CKeyMetadata`]         [.small]#[constructor]#
| Constructors
| xref:wallet/CKeyMetadata/SetNull.adoc[`SetNull`] 
| Resets all fields to their default null state.
|===


== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:wallet/CKeyMetadata/has_key_origin.adoc[`has_key_origin`] 
| Whether the key_origin is useful
| xref:wallet/CKeyMetadata/hdKeypath.adoc[`hdKeypath`] 
| optional HD/bip32 keypath. Still used to determine whether a key is a seed. Also kept for backwards compatibility
| xref:wallet/CKeyMetadata/hd_seed_id.adoc[`hd_seed_id`] 
| id of the HD seed used to derive this key
| xref:wallet/CKeyMetadata/key_origin.adoc[`key_origin`] 
| Key origin info with path and fingerprint
| xref:wallet/CKeyMetadata/nCreateTime.adoc[`nCreateTime`] 
| Key creation time as a unix timestamp; 0 means unknown.
| xref:wallet/CKeyMetadata/nVersion.adoc[`nVersion`] 
| Serialized version of this metadata.
|===


== Static Data Members

[cols="1,4"]
|===
| Name| Description
| xref:wallet/CKeyMetadata/CURRENT_VERSION.adoc[`CURRENT_VERSION`] 
| Version number written for new key metadata.
| xref:wallet/CKeyMetadata/VERSION_BASIC.adoc[`VERSION_BASIC`] 
| Original key metadata version.
| xref:wallet/CKeyMetadata/VERSION_WITH_HDDATA.adoc[`VERSION_WITH_HDDATA`] 
| Metadata version that adds HD keypath and seed id.
| xref:wallet/CKeyMetadata/VERSION_WITH_KEY_ORIGIN.adoc[`VERSION_WITH_KEY_ORIGIN`] 
| Metadata version that adds key origin info.
|===



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