[#WriteCompactSize-08]
= WriteCompactSize
:mrdocs:

Account for a CompactSize encoding when computing a serialized size.

== Synopsis

Declared in `<serialize.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
WriteCompactSize(
    xref:SizeComputer.adoc[SizeComputer]& os,
    uint64_t nSize);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *os*
| The size computer to update.
| *nSize*
| The value that would be encoded as a CompactSize.
|===


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