[#VersionBitsCache-CheckUnknownActivations]
= xref:VersionBitsCache.adoc[VersionBitsCache]::CheckUnknownActivations
:relfileprefix: ../
:mrdocs:

Check for unknown activations Returns a vector containing the bit number used for signalling and a bool indicating the deployment is likely to be ACTIVE, rather than merely LOCKED&lowbar;IN&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
&lsqb;&lsqb;requires&lowbar;capability(0x7f2e18fdbd78), requires&lowbar;capability(0x7f2e1a0cd248), requires&lowbar;capability(0x7f2e24cb7078), requires&lowbar;capability(0x7f2e37ab5598), requires&lowbar;capability(0x7f2e27e04f98), requires&lowbar;capability(0x7f2e1eea0f48), requires&lowbar;capability(0x7f2e283fbd08)&rsqb;&rsqb;
std::vector&lt;std::pair&lt;int, bool&gt;&gt;
CheckUnknownActivations(
    xref:CBlockIndex.adoc[CBlockIndex] const* pindex,
    xref:CChainParams.adoc[CChainParams] const& chainparams);
----

== Return Value

A vector of (bit number, likely&hyphen;active) pairs for unknown deployments&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *pindex*
| The block at which to check for unknown activations&period;
| *chainparams*
| The chain parameters for the active network&period;
|===


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