[#txindex-02-BlockTxPosition-tx_offset_in_block]
= xref:txindex-02.adoc[txindex]::xref:txindex-02/BlockTxPosition.adoc[BlockTxPosition]::tx&lowbar;offset&lowbar;in&lowbar;block
:relfileprefix: ../../
:mrdocs:

Byte offset of the transaction from the start of the block, including the header&period;

== Synopsis

Declared in `&lt;index&sol;txindex&lowbar;key&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
uint32&lowbar;t tx&lowbar;offset&lowbar;in&lowbar;block = &lcub;0&rcub;;
----


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