> For the complete documentation index, see [llms.txt](https://docs.xverse.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.xverse.app/sats-connect/spark-methods/flashnet-trading/spark_flashnet_getjwt.md).

# spark\_flashnet\_getJWT

Use the `spark_flashnet_getJWT` method to request a [**Flashnet JWT**](https://docs.flashnet.xyz/api-reference/auth/challenge) for the user’s Spark wallet.\
The wallet handles challenge/response with Flashnet:

* Fetches the challenge
* Signs it with the user’s Spark identity key
* Exchanges it for a JWT

Your app receives the JWT directly, without having to manage the user's authentication flow on Flashnet.

## **Parameters**

No parameters are required.

## **Example**

```ts
import { request } from "sats-connect";

try {
  const response = await request("spark_flashnet_getJWT", {});
  if ("result" in response) {
    console.log("JWT:", response.result.jwt);
  } else {
    console.error("Error:", response.error.message);
  }
} catch (err) {
  console.error("Unexpected error:", err);
}
```

## **Response**

### :white\_check\_mark: Success

On success, the method resolves to a JWT token that the dApp can use for authenticated Flashnet API calls.

```json
{
  "jwt": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
  "expiresAt": "2025-09-17T12:34:56Z"
}
```

* **`jwt`** — the Flashnet access token, to be passed as `Authorization: Bearer <jwt>` in API calls
* **`expiresAt`** — ISO timestamp when the token expires (token must be renewed afterwards)

### :x: Errors

If the request fails, the method will reject with an error object:

```json
{
  "errorCode": "FSAG-2001",
  "message": "Signature verification failed: Invalid nonce",
  "requestId": "01H8Z0HMVXJN6A8Q9GR1J6Z34E"
}
```

Common failure cases encountered with Flashnet [authentication](https://docs.flashnet.xyz/api-reference/auth/verify) include:

* **Validation errors** (malformed data)
* **Security errors** (invalid signature, wrong nonce)
* **Not found** (no active challenge for the public key)

These errors are surfaced as standard Sats Connect errors for your App to handle.


---

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