> For the complete documentation index, see [llms.txt](https://www.webln.guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.webln.guide/building-lightning-apps/webln-reference/webln.signmessage.md).

# webln.signMessage()

Request that the user signs an arbitrary string message. 

Signed messages can either be verified server-side using the LND RPC method, or by clients with [webln.verifyMessage](https://webln.dev/#/api/verify-message).

#### Method

```typescript
async function signMessage(message: string): SignMessageResponse;
```

#### Response

```typescript
interface SignMessageResponse {
  message: string;
  signature: string;
}
```

#### Code Example <a href="#demo" id="demo"></a>

```typescript
await webln.enable();
await webln.signMessage("Sample message"); 
```

#### Demo

{% embed url="<https://codepen.io/getalby/pen/eYyXQNQ>" %}

**Example in the wild**

<https://amboss.space/> uses `webln.signMessage()`for login. Users sign a message and prove ownership of a lightning node.

&#x20;<img src="/files/ISLoTIPjDhpBGNYxPuQj" alt="" data-size="original">


---

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