Function lookup_key_contacts_by_address_list

async fn lookup_key_contacts_by_address_list(
    context: &Context,
    address_list: &[SingleInfo],
    fingerprints: &[Fingerprint],
    chat_id: Option<ChatId>,
) -> Result<Vec<Option<ContactId>>>

Looks up key-contacts by email addresses.

fingerprints may be empty. This is used as a fallback when email addresses are available, but not the fingerprints, e.g. when core 1.157.3 client sends the To and Chat-Group-Past-Members header but not the corresponding fingerprint list.

Lookup is restricted to the chat ID.

If contact cannot be found, None is returned. This ensures that the length of the result vector is the same as the number of addresses in the header and it is possible to find corresponding Chat-Group-Member-Timestamps items.