[#btck_block_header_to_bytes]
= btck_block_header_to_bytes
:mrdocs:

Serializes the btck_BlockHeader to bytes. This is consensus serialization that is also used for the P2P network.

== Synopsis

Declared in `<kernel/bitcoinkernel.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[nodiscard, __nonnull__]]
int
btck_block_header_to_bytes(
    xref:btck_BlockHeader-00.adoc[btck_BlockHeader] const* header,
    unsigned char output[]);
----

== Return Value

0 on success.

[NOTE]
====
The return value https://en.cppreference.com/cpp/language/attributes/nodiscard[should not be discarded^].
====
== Parameters

[cols="1,4"]
|===
| Name| Description
| *header* [in]
| Non‐null.
| *output* [out]
| The serialized block header (80 bytes).
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#