[#btck_NotifyBlockTip]
= btck_NotifyBlockTip
:mrdocs:

Function signatures for the kernel notifications.

== Synopsis

Declared in `<kernel/bitcoinkernel.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef void(* btck_NotifyBlockTip)(void*, xref:btck_SynchronizationState.adoc[btck_SynchronizationState], xref:btck_BlockTreeEntry-0c.adoc[btck_BlockTreeEntry] const*, double);
----

== Description

Callback invoked when the active chain tip advances or reorganizes.


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