[#txindex-02-BLOCK_HEADER_SIZE]
= xref:txindex-02.adoc[txindex]::BLOCK_HEADER_SIZE
:relfileprefix: ../
:mrdocs:

Serialized size of a block header, the offset of the first byte after it.

== Synopsis

Declared in `<index/txindex_key.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr uint32_t BLOCK_HEADER_SIZE = {80};
----


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