func setNextSenderSessionPub(
keyStore session.Store,
sessionState *session.State,
sessionStateKey string,
rand io.Reader,
) (*uid.KeyEntry, error) {
// create next session key
var nextSenderSession uid.KeyEntry
if err := nextSenderSession.InitDHKey(rand); err != nil {
return nil, err
}
// store next session key
if err := addSessionKey(keyStore, &nextSenderSession); err != nil {
return nil, err
}
// update session state
sessionState.NextSenderSessionPub = &nextSenderSession
err := keyStore.SetSessionState(sessionStateKey, sessionState)
if err != nil {
return nil, err
}
return &nextSenderSession, nil
}
