MadelineProtoDocs/old_docs/API_docs_v51/methods/messages.getDhConfig.md
2019-12-27 17:48:04 +01:00

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---
title: messages.getDhConfig
description: Returns configuration parameters for Diffie-Hellman key generation. Can also return a random sequence of bytes of required length.
image: https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png
---
# Method: messages.getDhConfig
[Back to methods index](index.md)
Returns configuration parameters for Diffie-Hellman key generation. Can also return a random sequence of bytes of required length.
### Parameters:
| Name | Type | Description | Required |
|----------|---------------|-------------|----------|
|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|
### Return type: [messages\_DhConfig](../types/messages_DhConfig.md)
### 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();
$messages_DhConfig = $MadelineProto->messages->getDhConfig(['version' => int, 'random_length' => int, ]);
```
Or, if you're into Lua:
```lua
messages_DhConfig = messages.getDhConfig({version=int, random_length=int, })
```
### Errors
| Code | Type | Description |
|------|----------|---------------|
|400|RANDOM_LENGTH_INVALID|Random length invalid|