Function olm_sys::olm_account_generate_fallback_key

pub unsafe extern "C" fn olm_account_generate_fallback_key(
    account: *mut OlmAccount, 
    random: *mut c_void, 
    random_length: usize
) -> usize

Generates a new fallback key. Only one previous fallback key is stored. Returns olm_error() on error. If the number of random bytes is too small then olm_account_last_error() will be “NOT_ENOUGH_RANDOM”.