[#CBlockHeader-nVersion]
= xref:CBlockHeader.adoc[CBlockHeader]::nVersion
:relfileprefix: ../
:mrdocs:

Block version number, signaling supported consensus rules&period;

== Synopsis

Declared in `&lt;primitives&sol;block&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int32&lowbar;t nVersion;
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