Authenticator apps provide a time-based one-time password (TOTP) that can be used for authentication.

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Prerequisites

  • You need to have the Dynamic Client initialized.
  • You need to have the authenticator apps MFA enabled in your environment’s settings in the Dynamic dashboard.

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Registering a new TOTP device

Calling registerTotpMfaDevice will return a URI and a secret key for the TOTP device. You can use the URI to display a QR code to the user, so they can scan it with their authenticator app to get a TOTP code. Unlike passkeys, registering a TOTP device will not automatically authenticate it, so you need to call authenticateTotpMfaDevice after registering a TOTP device for the user to complete an MFA challenge. 
import { registerTotpMfaDevice } from '@dynamic-labs-sdk/client';

const register = async () => {
  const { uri, secret } = await registerTotpMfaDevice();
  console.log(uri, secret);
};

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Doing MFA authentication with a TOTP code

Calling authenticatePasskeyMFA will verify the TOTP code and complete the MFA challenge. The authentication will be successful if the user enters a valid TOTP code for the registered TOTP device. 
import { authTotpMfaDevice } from '@dynamic-labs-sdk/client';

const onLogin = async () => {
  // Replace '123456' with the actual TOTP code the user enters
  await authTotpMfaDevice({ code: '123456' });
};

// if you are using action-based MFA, you can create a single use MFA token for the action
// that mfa token will be stored in the user's session and will be used to authorize the action
const onExportPrivateKeyClick = async () => {
  // Replace '123456' with the actual TOTP code the user enters
  await authTotpMfaDevice({
    code: '123456',
    createMfaTokenOptions: { singleUse: true },
  });

  // then you can perform the action
  await exportWaasPrivateKey(params);
};

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Deleting a TOTP device

Calling deleteMfaDevice will delete a TOTP device associated with the authenticated user. To delete a TOTP device, you first need to get the user to perfome an authentication challenge with that TOTP device, and then use the deleteMfaDevice function with that MFA token. 
import { deleteMfaDevice } from '@dynamic-labs-sdk/client';

const delete = async () => {
  // Authenticate with the TOTP device to be deleted
  // Replace '123456' with the actual TOTP code the user enters
  await authTotpMfaDevice({
    code: '123456',
    createMfaTokenOptions: { singleUse: true },
  });

  // Get the MFA token from the dynamic client
  const mfaToken = dynamicClient.mfaToken;

  // Replace 'device-id' with the actual ID of the TOTP device you want to delete
  // Replace 'mfa-auth-token' with the actual MFA authentication token
  await deleteMfaDevice({ deviceId: 'device-id', mfaAuthToken: mfaToken });
};

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Getting all registered TOTP devices for a user

Calling getMfaDevices will return all registered TOTP devices for the authenticated user. Currently, only one TOTP device is supported per user. 
import { getMfaDevices } from '@dynamic-labs-sdk/client';

const getUserMfaDevices = async () => {
  const mfaDevices = await getMfaDevices();
  console.log(mfaDevices);
};