[#CZMQPublishRawBlockNotifier-2constructor]
= xref:CZMQPublishRawBlockNotifier.adoc[CZMQPublishRawBlockNotifier]::CZMQPublishRawBlockNotifier
:relfileprefix: ../
:mrdocs:

Construct the notifier with a callback that reads a block's raw bytes.

== Synopsis

Declared in `<zmq/zmqpublishnotifier.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
CZMQPublishRawBlockNotifier(std::function<bool(std::vector<std::byte>&, xref:CBlockIndex.adoc[CBlockIndex] const&)> get_block_by_index);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *get_block_by_index*
| Callback that reads a serialized block for a given index.
|===


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