[#node-BlockManager-m_block_tree_db]
= xref:node.adoc[node]::xref:node/BlockManager.adoc[BlockManager]::m&lowbar;block&lowbar;tree&lowbar;db
:relfileprefix: ../../
:mrdocs:

Handle to the on&hyphen;disk block index database (blocks&sol;index&sol;)&period;

== Synopsis

Declared in `&lt;node&sol;blockstorage&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
&lsqb;&lsqb;guarded&lowbar;by(0x7f2e1b098cb8), guarded&lowbar;by(0x7f2e26d1a418), guarded&lowbar;by(0x7f2e375e04f8), guarded&lowbar;by(0x7f2e333678b8), guarded&lowbar;by(0x7f2e3542e8a8), guarded&lowbar;by(0x7f2e28a73408)&rsqb;&rsqb;
std::unique&lowbar;ptr&lt;kernel::BlockTreeDB&gt; m&lowbar;block&lowbar;tree&lowbar;db;
----


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