[#BIP324Cipher-EXPANSION]
= xref:BIP324Cipher.adoc[BIP324Cipher]::EXPANSION
:relfileprefix: ../
:mrdocs:

Total ciphertext expansion added to each packet&period;

== Synopsis

Declared in `&lt;bip324&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
inline constexpr static
unsigned int EXPANSION = LENGTH&lowbar;LEN &plus; HEADER&lowbar;LEN &plus; FSChaCha20Poly1305&colon;&colon;EXPANSION;
----


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