[#node-BlockManager-m_block_tree_db]
= xref:node.adoc[node]::xref:node/BlockManager.adoc[BlockManager]::m_block_tree_db
:relfileprefix: ../../
:mrdocs:

Handle to the on‐disk block index database (blocks/index/).

== Synopsis

Declared in `<node/blockstorage.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[guarded_by(0x7fb95f04c948), guarded_by(0x7fb969da6708), guarded_by(0x7fb96c563158), guarded_by(0x7fb9857a0218), guarded_by(0x7fb96cb95b28), guarded_by(0x7fb95a5b9078)]]
std::unique_ptr<kernel::BlockTreeDB> m_block_tree_db;
----


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