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# SKPayment

A request to the App Store to process payment for additional functionality that your app offers.

```
class SKPayment
```

## Overview

A payment object identifies a product and the quantity of those items the user would like to purchase.

## Topics

### Creating Payments

[`init(product:)`](/documentation/StoreKit/SKPayment/init(product:))

Returns a new payment for the specified product.

[`paymentWithProductIdentifier:`](/documentation/StoreKit/SKPayment/paymentWithProductIdentifier:)

Returns a new payment with the specified product identifier.

### Getting Payment Details

[`productIdentifier`](/documentation/StoreKit/SKPayment/productIdentifier)

A string used to identify a product that can be purchased from within your app.

[`quantity`](/documentation/StoreKit/SKPayment/quantity)

The number of items the user wants to purchase.

[`requestData`](/documentation/StoreKit/SKPayment/requestData)

Reserved for future use.

[`applicationUsername`](/documentation/StoreKit/SKPayment/applicationUsername)

A string that associates the transaction with a user account on your service.

### Simulating Purchases for Testing

[`simulatesAskToBuyInSandbox`](/documentation/StoreKit/SKPayment/simulatesAskToBuyInSandbox)

A Boolean value that produces an “ask to buy” flow for this payment in the sandbox.

### Getting Discount Details

[`paymentDiscount`](/documentation/StoreKit/SKPayment/paymentDiscount)

The details of the discount offer to apply to the payment.

[`SKPaymentDiscount`](/documentation/StoreKit/SKPaymentDiscount)

The signed discount to apply to a payment.


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