[#MINIMUM_BLOCK_RESERVED_WEIGHT]
= MINIMUM&lowbar;BLOCK&lowbar;RESERVED&lowbar;WEIGHT
:mrdocs:

This accounts for the block header, var&lowbar;int encoding of the transaction count and a minimally viable coinbase transaction&period; It adds an additional safety margin, because even with a thorough understanding of block serialization, it&apos;s easy to make a costly mistake when trying to squeeze every last byte&period; Setting a lower value is prevented at startup&period;

== Synopsis

Declared in `&lt;policy&sol;policy&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
inline constexpr unsigned int MINIMUM&lowbar;BLOCK&lowbar;RESERVED&lowbar;WEIGHT = &lcub;2000&rcub;;
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#
