> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zeotap.com/llms.txt
> Use this file to discover all available pages before exploring further.

# SDK Reference

<Info>
  Looking for the full SDK developer documentation? See the [Zeotap SDKs](/articles/sdks/overview) section for per-platform installation, configuration, API reference, consent, and release notes.
</Info>

## SDKCallback

The **SDKCallback** function receives data in the following format:

```javascript theme={null}
{status: <SUCCESS|WARNING|ERROR>, message: <string>}
```

The **status** field indicates the result of the function call. Possible values are:

* **SUCCESS**: Indicates successful completion of an operation.
* **WARNING**: Indicates potential issues or incomplete actions that require attention.
* **ERROR**: Indicates a failure or exception during the operation.

The **message** field provides additional context about the status.

### Examples

Below are examples of the **status** and **message** combinations:

#### Success Messages

* `{status: "SUCCESS", message: "SDK initialized successfully"}`
* `{status: "SUCCESS", message: "Event logged successfully"}`
* `{status: "SUCCESS", message: "Page properties set successfully"}`
* `{status: "SUCCESS", message: "User properties set successfully"}`
* `{status: "SUCCESS", message: "User identities set successfully"}`

#### Warning Messages

* `{status: "WARNING", message: "SDK already initialized"}`
* `{status: "WARNING", message: "SDK initialization is in progress"}`
* `{status: "WARNING", message: "SDK not initialized"}`
* `{status: "WARNING", message: "Event name is empty"}`
* `{status: "WARNING", message: "Event properties are empty"}`
* `{status: "WARNING", message: "User identities are empty"}`
* `{status: "WARNING", message: "User IDs already set"}`
* `{status: "WARNING", message: "User IDs not set as consent not provided"}`
* `{status: "WARNING", message: "Page properties are empty"}`
* `{status: "WARNING", message: "User properties are empty"}`
* `{status: "WARNING", message: "Event not logged as consent not provided"}`
* `{status: "WARNING", message: "Page properties not set as consent not provided"}`
* `{status: "WARNING", message: "User properties not set as consent not provided"}`

#### Error Messages

When the function encounters issues with the data provided or an exception occurs, it returns an **ERROR** status with a descriptive **message**.

* `{status: "ERROR", message: "<error_message>"}`

##### Example

* `{status: "ERROR", message: "Failed to update user identities"}`
* `{status: "ERROR", message: "Invalid data format"}`
* `{status: "ERROR", message: "Null pointer exception"}`