[#CBlockIndex-GetUndoPos]
= xref:CBlockIndex.adoc[CBlockIndex]::GetUndoPos
:relfileprefix: ../
:mrdocs:

Returns the on‐disk position of this block's undo data.

== Synopsis

Declared in `<chain.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[requires_capability(0x7f9500cbe308), requires_capability(0x7f9511905948), requires_capability(0x7f951ec49bc8), requires_capability(0x7f9524d79cc8), requires_capability(0x7f9503ca0598), requires_capability(0x7f9516ce9c68), requires_capability(0x7f9520d77f28), requires_capability(0x7f9524d447c8), requires_capability(0x7f9517141b98), requires_capability(0x7f9516bbe638), requires_capability(0x7f94f38594e8)]]
xref:FlatFilePos.adoc[FlatFilePos]
GetUndoPos() const;
----

== Return Value

The file position, or a default position if the undo data is not available.


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