> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/merchant-tokenization/es/ctf-y-daf-de-visa/implement-ctf-and-daf/check-device-binding.md).

# Comprobar vinculación del dispositivo

Llame a esto antes de comenzar el enlace del dispositivo, o antes de autenticar una transacción.

Usa `getBindingState` (Thales SDK) para comprobar si un token ya está vinculado en el dispositivo.

### Integración del SDK

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

```java
String vProvisionedTokenId = ""; // Ejemplo
try {
    BindingState state = visaCTFHelper.getBindingState(vProvisionedTokenId);
} catch (TMGClientException e) {
    // Manejar error
}
```

{% endtab %}

{% tab title="iOS" %}

```swift
let vProvisionedTokenID = "" // Ejemplo
do {
    let state = try visaCTFHelper.bindingState(forVProvisionedTokenID: vProvisionedTokenID)
} catch let error {
    // Manejar el error
}
```

{% endtab %}
{% endtabs %}

Dependiendo del estado devuelto, continúe con uno de estos flujos:

* `NO VINCULADO`

  Iniciar el enlace del dispositivo. Vea [Flujo verde de enlace de dispositivo](/merchant-tokenization/es/ctf-y-daf-de-visa/implement-ctf-and-daf/create-device-binding-green-flow.md).
* `PENDING_ACTIVATION`

  Reanudar el enlace del dispositivo. Este estado generalmente significa que el emisor requirió **autenticación de escalado** usar un **métodos** método. Vea [Crear vinculación de dispositivo (flujo amarillo)](/merchant-tokenization/es/ctf-y-daf-de-visa/implement-ctf-and-daf/create-device-binding-yellow-flow.md).
* `VINCULADO`

  Autenticar transacciones. Vea [Procesar una transacción](/merchant-tokenization/es/ctf-y-daf-de-visa/implement-ctf-and-daf/authenticate-a-transaction.md).


---

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