[#btck-KernelNotifications-HeaderTipHandler]
= xref:btck.adoc[btck]::xref:btck/KernelNotifications.adoc[KernelNotifications]::HeaderTipHandler
:relfileprefix: ../../
:mrdocs:

Called when the best header advances.

== Synopsis

Declared in `<kernel/bitcoinkernel_wrapper.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
void
HeaderTipHandler(
    xref:btck/SynchronizationState.adoc[SynchronizationState] state,
    int64_t height,
    int64_t timestamp,
    bool presync);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *state*
| The current synchronization state.
| *height*
| The new header height.
| *timestamp*
| The new header's timestamp.
| *presync*
| True while still presyncing headers.
|===


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