[#CValidationInterface-ActiveTipChange]
= xref:CValidationInterface.adoc[CValidationInterface]::ActiveTipChange
:relfileprefix: ../
:mrdocs:

Notifies listeners any time the block chain tip changes, synchronously&period;

== Synopsis

Declared in `&lt;validationinterface&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
void
ActiveTipChange(
    xref:CBlockIndex.adoc[CBlockIndex] const& new&lowbar;tip,
    bool is&lowbar;ibd);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *new&lowbar;tip*
| The new active chain tip&period;
| *is&lowbar;ibd*
| Whether the node is still in initial block download&period;
|===


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