[#CTxMemPool-StartBlockBuilding]
= xref:CTxMemPool.adoc[CTxMemPool]::StartBlockBuilding
:relfileprefix: ../
:mrdocs:

Begin building a block by creating the block builder from the transaction graph&period;

== Synopsis

Declared in `&lt;txmempool&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
&lsqb;&lsqb;requires&lowbar;capability(0x7f95135d3ec8), requires&lowbar;capability(0x7f9501b132a8), requires&lowbar;capability(0x7f950ec79498), requires&lowbar;capability(0x7f9525ea91e8), requires&lowbar;capability(0x7f9515098928), requires&lowbar;capability(0x7f950826cbc8), requires&lowbar;capability(0x7f94f85702d8), requires&lowbar;capability(0x7f9513c5a4c8)&rsqb;&rsqb;
void
StartBlockBuilding() const;
----


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