---
title: "Get transaction data from tx_store_report - C"
url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/c-library-integration/extras-c-library/get-transaction-data-from-tx_store_report-c"
source_url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/c-library-integration/extras-c-library/get-transaction-data-from-tx_store_report-c.md"
canonical: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/c-library-integration/extras-c-library/get-transaction-data-from-tx_store_report-c"
last_modified: "2026-05-24T12:54:31+02:00"
language: "en"
---

# Get transaction data from tx\_store\_report - C

[View source](/point-of-sale/classic-library-deprecation/classic-library-integrations/c-library-integration/extras-c-library/get-transaction-data-from-tx_store_report-c.md)

## Implement the callback

Implement the `tx_store_query_CB` callback based on the signature in the **tx\_store\_report\_extern.h** file and  pass this as a parameter of the `tx_store_query` call. For more information on how to do this, see [Implement callbacks](/point-of-sale/classic-library-deprecation/classic-library-integrations/c-library-integration/calls-and-callbacks-c-library/implement-callbacks).

### Code example

```cpp
void tx_store_query_CB(tx_store_query_response *p, void *echo_struct)
```

## Allocate the request structure

Use `tx_store_query_allocate` to allocate, initialize and return a `tx_store_query_request` structure. Populate the request by performing string duplication.

If you want the data for later use, retain it, or it will be released automatically

## Call the tx\_store\_query function

Use the `tx_store_query` function to retrieve the `tx_store_report`, which contains results from past transactions.

### Parameters

| Name                     | Type   | Required                                                                                    | Description                                                                                                                                                                                                                                                    |
| ------------------------ | ------ | ------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `tx_store_query_request` | struct | ![-white\_check\_mark-](/user/data/smileys/emoji/white_check_mark.png "-white_check_mark-") | Struct that contains specific elements to retrieve a `tx_store_report`. For parameters and more information, see the `tx_store_query_request` page                                                                                                             |
| `tx_store_query_CB`      | void   | ![-white\_check\_mark-](/user/data/smileys/emoji/white_check_mark.png "-white_check_mark-") | Pointer to a callback function you implemented which includes the `tx_store_query_response`.                                                                                                                                                                   |
| `echo_struct`            | struct | ![-white\_check\_mark-](/user/data/smileys/emoji/white_check_mark.png "-white_check_mark-") | A POS-defined struct that is echoed back in the callback. Use this to share a POS data struct between the call to the library and the callback from the library. You can add any pointer to `echo_struct`, and this will be returned on its specific callback. |

## Handle the callback

The `tx_store_query` callback returns a response which includes the  `tx_store_report`.

### Parameters

| Name                      | Description                                                                                                                                                                    |
| ------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `tx_store_query_response` | The immediate response to the` tx_store_query` call, which includes the result of the call. This includes the  `tx_store_report` object.                                       |
| `echo_struct`             | A pointer to a user-defined struct that is echoed back in the callback. Use this to share a POS data struct between the call to the library and the callback from the library. |

A `pspReference` and `authCode` will not be visible if the transaction was performed offline.