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

Key prefix mapping a block sequence number to its block hash.

== Synopsis

Declared in `<index/txindex_key.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr uint8_t DB_BLOCK_SEQ = {'s'};
----


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