[#node-BlockManager-AddToBlockIndex]
= xref:node.adoc[node]::xref:node/BlockManager.adoc[BlockManager]::AddToBlockIndex
:relfileprefix: ../../
:mrdocs:

Add a block header to the in‐memory block index, updating the best header.

== Synopsis

Declared in `<node/blockstorage.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[requires_capability(0x7f2e1b098fc8), requires_capability(0x7f2e26d1a728), requires_capability(0x7f2e375e0808), requires_capability(0x7f2e33367bc8), requires_capability(0x7f2e3542ebb8), requires_capability(0x7f2e28a73718)]]
xref:CBlockIndex.adoc[CBlockIndex]*
AddToBlockIndex(
    xref:CBlockHeader.adoc[CBlockHeader] const& block,
    xref:CBlockIndex.adoc[CBlockIndex]*& best_header);
----

== Return Value

The block index entry for `block.`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *block*
| The block header to add.
| *best_header*
| Reference to the best‐header pointer, updated if this block is better.
|===


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