- long ret = bindings.UpdateFulfillHTLC_new(InternalUtils.check_arr_len(channel_id_arg, 32), htlc_id_arg, InternalUtils.check_arr_len(payment_preimage_arg, 32));
+ long ret = bindings.UpdateFulfillHTLC_new(InternalUtils.encodeUint8Array(InternalUtils.check_arr_len(channel_id_arg, 32)), htlc_id_arg, InternalUtils.encodeUint8Array(InternalUtils.check_arr_len(payment_preimage_arg, 32)));