# onResult

Canonical page: https://docs.ovok.com/native-sdk/guide/components/bt-management/bt-provider/on-result

`onResult` is the handoff from the Bluetooth runtime to application code. It receives the reading's device metadata, normalized measurement data, and a stable identity.

~~~tsx
<BTProvider
  {...providerProps}
  onResult={(result) => {
    const idempotencyKey = result.id;
    const payload = {
      device: result.deviceData,
      measurement: result.data,
    };

    void persistAndUpload(payload, { idempotencyKey });
  }}
/>
~~~

The `id` is stable when a device sends the same stored reading again. It is enumerable and non-writable at runtime, so object spreads and JSON serialization include it. Use it as an idempotency key if uploads can be retried.

`data` is a normalized measurement without the device-internal `caseType`. The result type is narrowed by the provider's `acceptedDevices` tuple. Validate and associate the result with the correct app user before persistence or upload.

See [measurement events in the Bluetooth guide](/native-sdk/guide/modules/bt-management) and [background delivery](/native-sdk/guide/modules/background-sync).