[#btck-BlockHeader-2constructor-05]
= xref:btck.adoc[btck]::xref:btck/BlockHeader.adoc[BlockHeader]::BlockHeader
:relfileprefix: ../../
:mrdocs:

Constructs a header by deserializing its 80&hyphen;byte form&period;

== Synopsis

Declared in `&lt;kernel&sol;bitcoinkernel&lowbar;wrapper&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
BlockHeader(std::span&lt;std::byte const&gt; raw&lowbar;header);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *raw&lowbar;header*
| The serialized header bytes&period;
|===


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