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---
title: messages.getDhConfig
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description: Returns configuration parameters for Diffie-Hellman key generation. Can also return a random sequence of bytes of required length.
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image: https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png
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redirect_from: /API_docs/methods/messages_getDhConfig.html
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---
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# Method: messages.getDhConfig
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[Back to methods index ](index.md )
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Returns configuration parameters for Diffie-Hellman key generation. Can also return a random sequence of bytes of required length.
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### Parameters:
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| Name | Type | Description | Required |
|----------|---------------|-------------|----------|
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|version|[int](../types/int.md) | Value of the **version** parameter from [messages.dhConfig ](../constructors/messages.dhConfig.md ), avialable at the client | Yes|
|random\_length|[int](../types/int.md) | Length of the required random sequence | Yes|
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### Return type: [messages.DhConfig](../types/messages.DhConfig.md)
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### Can bots use this method: **NO**
### 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');
$MadelineProto->start();
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$messages.DhConfig = $MadelineProto->messages->getDhConfig(['version' => int, 'random_length' => int, ]);
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```
Or, if you're into Lua:
```lua
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messages.DhConfig = messages.getDhConfig({version=int, random_length=int, })
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```
### Errors
| Code | Type | Description |
|------|----------|---------------|
|400|RANDOM_LENGTH_INVALID|Random length invalid|
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