> 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/taf-de-mastercard/implement-taf/check-device-binding.md).

# Comprobar vinculación del dispositivo

Use el SDK de Thales para comprobar el estado actual de vinculación del dispositivo para una ID de token aprovisionada.

Llame a esto antes de iniciar un flujo de transacción. El estado devuelto le indica si debe crear primero una vinculación.

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

```java
public void getBindingState(@NonNull MastercardTAFHelper mastercardTAFHelper, @NonNull String tokenID) {
    try {
        BindingState bindingState = mastercardTAFHelper.getBindingState(tokenID);
    } catch (TMGClientException e) {
        // Manejar el error
    }
}
```

{% endtab %}

{% tab title="iOS" %}

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

{% endtab %}
{% endtabs %}

### Siguientes pasos según el estado de la vinculación

Utilice el valor devuelto para elegir la siguiente llamada en su flujo.

* `NO VINCULADO`

  La ID de token aprovisionada aún no se ha vinculado a este dispositivo.

  Cree la vinculación entre el cliente y el servidor. Consulte el [crear vinculación del dispositivo](/merchant-tokenization/es/taf-de-mastercard/implement-taf/create-device-binding.md).
* `VINCULADO`

  La ID de token aprovisionada ya está vinculada a este dispositivo.

  Utilice la ID de token aprovisionada para autenticar la transacción. Consulte el [autenticar una transacción](/merchant-tokenization/es/taf-de-mastercard/implement-taf/authenticate-a-transaction.md).


---

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