[#txindex-02-BlockHashKey]
= xref:txindex-02.adoc[txindex]::BlockHashKey
:relfileprefix: ../
:mrdocs:

Key for looking up the sequence number assigned to the block with the given hash.

== Synopsis

Declared in `<index/txindex_key.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct BlockHashKey;
----

== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:txindex-02/BlockHashKey/block_hash.adoc[`block_hash`] 
| Hash of the block to look up.
|===



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