[#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(0x7f2e18da68d8), requires_capability(0x7f2e18c0aa38), requires_capability(0x7f2e3219ce98), requires_capability(0x7f2e348012c8), requires_capability(0x7f2e331bb728), requires_capability(0x7f2e32e73688), requires_capability(0x7f2e42eecfd8), requires_capability(0x7f2e2ad45948), requires_capability(0x7f2e318b81c8), requires_capability(0x7f2e283ee128), requires_capability(0x7f2e29d40538)]]
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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