MadelineProtoDocs/old_docs/API_docs_v66/methods/help.getCdnConfig.md

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---
title: help.getCdnConfig
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description: Get configuration for [CDN](https://core.telegram.org/cdn) file downloads.
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image: https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png
---
# Method: help.getCdnConfig
[Back to methods index](index.md)
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Get configuration for [CDN](https://core.telegram.org/cdn) file downloads.
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### Return type: [CdnConfig](../types/CdnConfig.md)
### Can bots use this method: **YES**
### MadelineProto Example ([now async for huge speed and parallelism!](https://docs.madelineproto.xyz/docs/ASYNC.html)):
```php
if (!file_exists('madeline.php')) {
copy('https://phar.madelineproto.xyz/madeline.php', 'madeline.php');
}
include 'madeline.php';
$MadelineProto = new \danog\MadelineProto\API('session.madeline');
$MadelineProto->start();
$CdnConfig = $MadelineProto->help->getCdnConfig();
```
Or, if you're into Lua:
```lua
CdnConfig = help.getCdnConfig({})
```
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### Errors
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| Code | Type | Description |
|------|----------|---------------|
|406|AUTH_KEY_DUPLICATED|An auth key with the same ID was already generated|
|401|AUTH_KEY_PERM_EMPTY|The temporary auth key must be binded to the permanent auth key to use these methods.|
|-503|Timeout|Timeout while fetching data|
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