[#BIP9Info-active_since]
= xref:BIP9Info.adoc[BIP9Info]::active_since
:relfileprefix: ../
:mrdocs:

Height at which the deployment is active, if known. May be in the future.

== Synopsis

Declared in `<versionbits.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::optional<int> active_since;
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