---
title: "init_library_request"
url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/c-library-integration/structs/init_library_request"
source_url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/c-library-integration/structs/init_library_request.md"
canonical: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/c-library-integration/structs/init_library_request"
last_modified: "2026-05-24T12:54:31+02:00"
language: "en"
---

# init\_library\_request

[View source](/point-of-sale/classic-library-deprecation/classic-library-integrations/c-library-integration/structs/init_library_request.md)

Contains the following data elements:

| Name              | Type             | Description                                                                                                                                                                                                                                                                                     |
| ----------------- | ---------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `flags`           | Unsigned Integer | A set of library flags.                                                                                                                                                                                                                                                                         |
| library\_log      | void function    | The C library uses this function to write log lines.                                                                                                                                                                                                                                            |
| `environment`     | ADYEnvironment   | Defines the environment, where the system executes transactions, using ENVIRONMENT\_TYPE values: ENVIRONMENT\_LIVE or ENVIRONMENT\_TEST.                                                                                                                                                        |
| `pos_name`        | char             | The symbolic POS name.                                                                                                                                                                                                                                                                          |
| `app_name`        | char             | The Integrator/Merchant App name.Format this value like so: **Cash register company and product** /** Cash register product version** / **Adyen integration name** / **Adyen integration version**. For example,  **Acme Corp POS** / **1.2.1** / **Acme Adyen connector** / **0.1 ** |
| `app_id`          | char             | The Integrator/Merchant App ID.                                                                                                                                                                                                                                                                 |
| `integrator_name` | char             | The integrator name.This value should be the name of the company deploying cash register or Point-of-Sale solution, for example,  **Retail Consultancy Corp.**                                                                                                                                  |

The following data elements are used in cases where the library throws an exception which is not related to a PED, otherwise the data elements in [ped\_device\_info](/point-of-sale/classic-library-deprecation/classic-library-integrations/c-library-integration/structs/ped_device_info) will be used

| Name              | Type             | Required                                                                                    | Description                                                                                                                                                                                                                                                    |
| ----------------- | ---------------- | ------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `throw_exception` | void function    | ![-white\_check\_mark-](/user/data/smileys/emoji/white_check_mark.png "-white_check_mark-") |  Function called when an exception is thrown.                                                                                                                                                                                                                  |
| `echo_struct`     | state pointer    | ![-x-](/user/data/smileys/emoji/x.png "-x-")                                                | 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. |
| `logArea`         | Unsigned Integer | ![-x-](/user/data/smileys/emoji/x.png "-x-")                                                | Defines the parts of the logs you can see. As default set this to 0xffff.                                                                                                                                                                                      |