[#Chainstate-FindForkInGlobalIndex]
= xref:Chainstate.adoc[Chainstate]::FindForkInGlobalIndex
:relfileprefix: ../
:mrdocs:

Find the last common block of this chain and a locator.

== Synopsis

Declared in `<validation.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[requires_capability(0x7f2e1ba84ea8), requires_capability(0x7f2e14564af8), requires_capability(0x7f2e373bdca8), requires_capability(0x7f2e36e348f8)]]
xref:CBlockIndex.adoc[CBlockIndex] const*
FindForkInGlobalIndex(xref:CBlockLocator.adoc[CBlockLocator] const& locator) const;
----

== Return Value

The most recent block index entry common to both chains.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *locator*
| Block locator describing the other chain.
|===


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