> For the complete documentation index, see [llms.txt](https://docs.vida.id/identity-stack/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vida.id/identity-stack/authentication/authentication-factors/cryptographic-token-pki/integration-methods/sdk/react-native-kit/methods.md).

# Methods

### **`updateToken(token)`**

Registers access token.

**Param Description:**

* `token`: Access token

### **`getCredentialId()`**

Retrieves the registered credential ID.

**Returns:** Credential ID

### **`registerDevice(credentialId, password)`**

Binds a new credentialId to a device. If registration was successful, you can start signing messages. Password is an optional property, but registration will fail if a presence user registers without a password.

**Returns**: “Credentials registered” string if registration succeeds

**Param Description:**

* `credentialId`: Credential ID to bind
* `password`: Presence user’s password used to sign the message

### **`signMessage(messageHash)`**

Signing message for silent user.

**Returns:** Message signature

**Param Description:**

* `messageHash`: Hash of the message to sign

### **`signMessageWithUserPresence(messageHash, password)`**

Signing message for a presence user with a password.

**Returns:** Message signature

**Param Description:**

* `messageHash`: Hash of the message to sign
* `password`: Password provided when registering the device

### **`signMessageWithUserPresenceUsingBiometrics(messageHash, localizedBiometricReason, title, cancel)`**

Signing message for a presence user using a biometric sensor.

**Returns:** Message signature

**Param Description:**

* `messageHash`: Hash of the message to sign
* `localizedBiometricReason`: Description shown on the biometric dialog
* `title`: Title of the biometric dialog
* `cancel`: Cancel button caption of the biometric dialog

### **`isBiometryAvailable()`**

Status of biometric sensor availability.

**Returns:** Boolean

### **`enableBiometrics(password, localizedBiometricReason, title, cancel)`**

Enable singing with biometrics.

**Returns:** "Biometry enabled" string if biometrics enabled.

**Param Description:**

* `password`: Password provided when registering the device
* `localizedBiometricReason`: Description shown on the biometric dialog
* `title`: Title of the biometric dialog
* `cancel`: Cancel button caption of the biometric dialog

### **`disableBiometrics(password)`**

Disable singing with biometrics.

**Returns:** "Biometry disabled" string if biometrics disabled.

**Param Description:**

* `password`: Password provided when registering the device

### **`hasSilentCredentials()`**

Check if the user is a silent user.

**Returns:** Boolean

### **`hasPresenceCredentials()`**

Check if the user is a presence user and needs to provide a password.

**Returns:** Boolean

### **`hasBiometryEnabled()`**

Check if biometry is enabled to sign the messages.

**Returns:** Boolean

### **`wipeDevice(password)`**

Wipe credentials for the current device. Password should be provided.

**Returns:** "Device wiped" string on successful execution.

**Param Description:**

* `password`: Password provided when registering the device

### **`wipeForgotPassword()`**

Wipe credentials for the current device.

**Returns:** "Device wiped" string on successful execution.

### **`registerTransaction(presence, messageHash)`**

Registers a transaction.

**Returns:** Transaction ID

**Param Description:**

* `presence`: "SILENT\_USER" or "ENFORCE\_USER\_PRESENCE"
* `messageHash`: Hash of the message

### **`finishTransaction(transactionId, password)`**

Finishes a transaction.

**Returns:** "Transaction complete" string if the transaction is finished.

**Param Description:**

* `transactionId`: Transaction ID provided by `registerTransaction`
* `password`: Password provided when registering the device