---
title: applicationData
framework: passkit
role: symbol
role_heading: Instance Property
path: passkit/pkpaymentrequest/applicationdata
---

# applicationData

Application-specific data or state.

## Declaration

```swift
var applicationData: Data? { get set }
```

## Discussion

Discussion Use this property for additional data as may be appropriate for your app—for example, a shopping cart identifier or an order number. A hash of this data is included in the signed payment data (the paymentData property of PKPaymentToken). You are responsible for sending the full application data to your server, if needed.