- long ret = bindings.ClosingSigned_new(channel_id_arg, fee_satoshis_arg, signature_arg, fee_range_arg == null ? 0 : fee_range_arg.ptr & ~1);
+ long ret = bindings.ClosingSigned_new(InternalUtils.check_arr_len(channel_id_arg, 32), fee_satoshis_arg, InternalUtils.check_arr_len(signature_arg, 64), fee_range_arg == null ? 0 : fee_range_arg.ptr & ~1);