---
title: "Handle additional data"
url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/ios-integration/key-steps-ios/process-a-basic-transaction-ios/handle-additional-data-ios"
source_url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/ios-integration/key-steps-ios/process-a-basic-transaction-ios/handle-additional-data-ios.md"
canonical: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/ios-integration/key-steps-ios/process-a-basic-transaction-ios/handle-additional-data-ios"
last_modified: "2026-05-24T12:54:31+02:00"
language: "en"
---

# Handle additional data

[View source](/point-of-sale/classic-library-deprecation/classic-library-integrations/ios-integration/key-steps-ios/process-a-basic-transaction-ios/handle-additional-data-ios.md)

## Delegate

The `transactionProvidesAdditionalData` delegate is called when a transaction provides additional data, for example loyalty-related data, providing the app with an opportunity to modify the amount charged based on that data.

After this method has been called, transaction-processing will be paused until `continueWithUpdatedAmount` is called on the given `additionalDataRequest`, either with an `NSNumber` to update the amount, or with `nil` to continue with the original amount.

Instead of calling `continueWithUpdatedAmount`, it it also possible to cancel the transaction at this point as usual, by calling `[ADYTransactionRequest requestCancel]`. After the transaction has been cancelled, subsequent calls to `continueWithUpdatedAmount` will have no effect.

### Parameters

| Name                    | Type                     | Required                                                                                    | Description                                                                                          |
| ----------------------- | ------------------------ | ------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------- |
| `additionalDataRequest` | ADYAdditionalDataRequest | ![-white\_check\_mark-](/user/data/smileys/emoji/white_check_mark.png "-white_check_mark-") | Request-object used to inform the ADYTransactionProcessorDelegate that additional data is available. |

### Declaration code example

#### Objective-C

```objectivec
- (void)transactionProvidesAdditionalData:
    (ADYAdditionalDataRequest *)additionalDataRequest;
```

#### Swift

```swift
func transactionProvidesAdditionalData(_ additionalDataRequest: ADYAdditionalDataRequest!)
```