# @ohos.identifier.oaid (OAID)


The **OAID** module provides APIs for obtaining Open Anonymous Device Identifiers (OAIDs).


> **NOTE**
>
> The initial APIs of this module are supported since API version 10. Newly added APIs will be marked with a superscript to indicate their earliest API version.
>
> To use the APIs for obtaining OAIDs, you must [request the ohos.permission.APP_TRACKING_CONSENT permission](../../security/AccessToken/request-user-authorization.md).


## Modules to Import

```
import { identifier } from '@kit.AdsKit';
```


## identifier.getOAID

getOAID(): Promise<string>

Obtains an OAID. This API uses a promise to return the result.

**Required permissions**: ohos.permission.APP_TRACKING_CONSENT

**System capability**: SystemCapability.Advertising.OAID

**Return value**

| Type| Description| 
| -------- | -------- |
| Promise&lt;string&gt; | Promise used to return the OAID.<br>1. If the application has configured the permission **ohos.permission.APP_TRACKING_CONSENT** and the permission is allowed, the OAID is returned.<br>2. If the application has configured the permission **ohos.permission.APP_TRACKING_CONSENT** and the permission is disallowed, 00000000-0000-0000-0000-000000000000 is returned.<br>3. If the application has not configured the permission **ohos.permission.APP_TRACKING_CONSENT**, 00000000-0000-0000-0000-000000000000 is returned.| 

**Error codes**

For details about the following error codes, see [OAID Error Codes](errorcode-oaid.md).

| ID| Error Message| 
| -------- | -------- |
| 17300001 | System&nbsp;internal&nbsp;error. | 

**Example**
```
import { identifier } from '@kit.AdsKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
import { BusinessError } from '@kit.BasicServicesKit';

try {
  identifier.getOAID().then((data) => {
    const oaid: string = data;
    hilog.info(0x0000, 'testTag', '%{public}s', `succeeded in getting oaid by promise, oaid: ${oaid}`);
  }).catch((err: BusinessError) => {
    hilog.error(0x0000, 'testTag', '%{public}s',
      `get oaid by promise failed, code: ${err.code}, message: ${err.message}`);
  })
} catch (err) {
  hilog.error(0x0000, 'testTag', '%{public}s', `get oaid by promise catch error: ${err.code} ${err.message}`);
}
```


## identifier.getOAID

getOAID(callback: AsyncCallback&lt;string&gt;): void

Obtains an OAID. This API uses an asynchronous callback to return the result.

**Required permissions**: ohos.permission.APP_TRACKING_CONSENT

**System capability**: SystemCapability.Advertising.OAID

**Parameters**


| Name| Type| Mandatory| Description| 
| -------- | -------- | -------- | -------- |
| callback | AsyncCallback&lt;string&gt; | Yes| Callback used to return the OAID.<br>1. If the application has configured the permission **ohos.permission.APP_TRACKING_CONSENT** and the permission is allowed, the OAID is returned.<br>2. If the application has configured the permission **ohos.permission.APP_TRACKING_CONSENT** and the permission is disallowed, 00000000-0000-0000-0000-000000000000 is returned.<br>3. If the application has not configured the permission **ohos.permission.APP_TRACKING_CONSENT**, 00000000-0000-0000-0000-000000000000 is returned.| 


**Error codes**


For details about the following error codes, see [OAID Error Codes](errorcode-oaid.md).


| ID| Error Message| 
| -------- | -------- |
| 17300001 | System&nbsp;internal&nbsp;error. | 


**Example**
```
import { identifier } from '@kit.AdsKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
import { BusinessError } from '@kit.BasicServicesKit';
 
try {
  identifier.getOAID((err: BusinessError, data: string) => {
    if (err.code) {
      hilog.error(0x0000, 'testTag', '%{public}s', `get oaid by callback failed, error: ${err.code} ${err.message}`);
    } else {
      const oaid: string = data;
      hilog.info(0x0000, 'testTag', '%{public}s', 'succeed in getting oaid by callback');
    }
   });
} catch (err) {
  hilog.error(0x0000, 'testTag', '%{public}s', `get oaid by callback catch error: ${err.code} ${err.message}`);
}
```