[#BaseIndex-DB-WriteBestBlock]
= xref:BaseIndex.adoc[BaseIndex]::xref:BaseIndex/DB.adoc[DB]::WriteBestBlock
:relfileprefix: ../../
:mrdocs:

Write block locator of the chain that the index is in sync with.

== Synopsis

Declared in `<index/base.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
void
WriteBestBlock(
    xref:CDBBatch.adoc[CDBBatch]& batch,
    xref:CBlockLocator.adoc[CBlockLocator] const& locator);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *batch*
| Write batch that the update is added to.
| *locator*
| Block locator marking the chain the index is synced to.
|===


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