[#interfaces-BlockInfo-prev_hash]
= xref:interfaces.adoc[interfaces]::xref:interfaces/BlockInfo.adoc[BlockInfo]::prev_hash
:relfileprefix: ../../
:mrdocs:

Hash of the previous block, or null for the genesis block.

== Synopsis

Declared in `<kernel/chain.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:uint256.adoc[uint256] const* prev_hash = nullptr;
----


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