[#btck-ChainMan-GetBlockTreeEntry]
= xref:btck.adoc[btck]::xref:btck/ChainMan.adoc[ChainMan]::GetBlockTreeEntry
:relfileprefix: ../../
:mrdocs:

Looks up a block tree entry by hash.

== Synopsis

Declared in `<kernel/bitcoinkernel_wrapper.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::optional<BlockTreeEntry>
GetBlockTreeEntry(xref:btck/BlockHash.adoc[BlockHash] const& block_hash) const;
----

== Return Value

The matching entry, or std::nullopt if unknown.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *block_hash*
| The hash to look up.
|===


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