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

Initialize when the other side's public key is received. Can only be called once.

== Synopsis

Declared in `<bip324.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
Initialize(
    xref:EllSwiftPubKey.adoc[EllSwiftPubKey] const& their_pubkey,
    bool initiator,
    bool self_decrypt = false) noexcept;
----

== Description

initiator is set to true if we are the initiator establishing the v2 P2P connection. self_decrypt is only for testing, and swaps encryption/decryption keys, so that encryption and decryption can be tested without knowing the other side's private key.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *their_pubkey*
| The other side's ElligatorSwift‐encoded public key.
| *initiator*
| True if we initiated the v2 P2P connection.
| *self_decrypt*
| Testing only; swaps the encryption and decryption keys.
|===


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