[#OSSL_HPKE_CTX_set_seq]
= OSSL_HPKE_CTX_set_seq
:mrdocs:

Set the AEAD sequence number used on the next seal/open call (receivers only).

== Synopsis

Declared in `<openssl/hpke.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
OSSL_HPKE_CTX_set_seq(
    xref:OSSL_HPKE_CTX.adoc[OSSL_HPKE_CTX]* ctx,
    uint64_t seq);
----

== Return Value

1 on success, or 0 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Receiver HPKE context; fails if `ctx` is a sender context.
| *seq*
| Sequence / nonce increment value to install.
|===


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