[#btck-ChainView-Contains]
= xref:btck.adoc[btck]::xref:btck/ChainView.adoc[ChainView]::Contains
:relfileprefix: ../../
:mrdocs:

Tests whether an entry belongs to this chain.

== Synopsis

Declared in `<kernel/bitcoinkernel_wrapper.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
Contains(xref:btck/BlockTreeEntry.adoc[BlockTreeEntry]& entry) const;
----

== Return Value

True when the entry is part of the chain.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *entry*
| The entry to test.
|===


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