[#wallet-DatabaseOptions-require_format]
= xref:wallet.adoc[wallet]::xref:wallet/DatabaseOptions.adoc[DatabaseOptions]::require&lowbar;format
:relfileprefix: ../../
:mrdocs:

Require a specific database format, if set&period;

== Synopsis

Declared in `&lt;wallet&sol;db&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::optional&lt;DatabaseFormat&gt; require&lowbar;format;
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