> For the complete documentation index, see [llms.txt](https://painor.gitbook.io/gramjs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://painor.gitbook.io/gramjs/working-with-secret-chats/messages.getdhconfig.md).

# messages.getDhConfig

Returns configuration parameters for Diffie-Hellman key generation. Can also return a random sequence of bytes of required length.

## Example

{% tabs %}
{% tab title="Javascript" %}

```javascript
const {Api, TelegramClient} = require('telegram');
const {StringSession} = require('telegram/sessions');

const session = new StringSession('');
const client = new TelegramClient(session, apiId, apiHash, {});

(async function run() {
    const result = await client.invoke(new Api.messages.getDhConfig({
        version: 6115373,
        randomLength: 6606435,
        }));
    console.log(result); // prints the result
})();
```

{% endtab %}

{% tab title="TypeScript" %}

```typescript
import {Api, TelegramClient} from 'telegram';
import {StringSession} from 'telegram/sessions';

const session = new StringSession('');
const client = new TelegramClient(session, apiId, apiHash, {});

(async function run() {
    const result: Api.messages.DhConfig = await client.invoke(new Api.messages.getDhConfig({
        version: 6115373,
        randomLength: 6606435,
        }));
    console.log(result); // prints the result
})();
```

{% endtab %}
{% endtabs %}

## TL schema

```
messages.dhConfigNotModified#c0e24635 random:bytes = messages.DhConfig;
messages.dhConfig#2c221edd g:int p:bytes version:int random:bytes = messages.DhConfig;
---functions---
messages.getDhConfig#26cf8950 version:int random_length:int = messages.DhConfig;
```

## Parameters

|        Name        | Type                                      | Description                                                                                                                                   |
| :----------------: | ----------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------- |
|     **version**    | [int](https://core.telegram.org/type/int) | Value of the **version** parameter from [messages.dhConfig](https://core.telegram.org/constructor/messages.dhConfig), avialable at the client |
| **random\_length** | [int](https://core.telegram.org/type/int) | Length of the required random sequence                                                                                                        |

## Result

[messages.DhConfig](https://core.telegram.org/type/messages.DhConfig)

## Possible errors

| Code | Type                    | Description           |
| :--: | ----------------------- | --------------------- |
|  400 | RANDOM\_LENGTH\_INVALID | Random length invalid |

## Can bots use this methd ?

### yes

## Related pages

### [messages.dhConfig](https://core.telegram.org/constructor/messages.dhConfig)

New set of configuring parameters.