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import jwt from 'jsonwebtoken';

const APP_ID = process.env['ONESIGNAL_APP_ID']
const IDENTITY_VERIFICATION_SECRET = process.env['ONESIGNAL_IDENTITY_VERIFICATION_SECRET_KEY']

// Generates JWT, potentially with subscription claims, for the user identified by the External ID
function signOneSignalJWT(externalId, subscriptions) {
return jwt.sign({
iss: APP_ID,
exp: Math.floor(Date.now() / 1000) + 3600, // 1-hour expiration
identity: {
'external_id': externalId,
},
subscriptions
},
IDENTITY_VERIFICATION_SECRET,
{ algorithm: 'ES256' });
}

// Pass this token to your mobile app to use with the `login` SDK method
const onesignalJWT = signOneSignalJWT('EXTERNAL_ID');

  node server.js

  curl http://localhost:3000/generate-jwt/your-external-id

const subscriptions = [
  {
      "type": "Email",
      "token": "[email protected]"
  },
  {
      "type": "SMS",
      "token": "+12345678"
  }
]
const onesignalJWT = signOneSignalJWT('EXTERNAL_ID', subscriptions)

String externalId = "YOUR_EXTERNAL_ID";
String onesignalJWT = "YOUR_JWT_TOKEN";

OneSignal.login(externalId, onesignalJWT);

OneSignal.addUserJwtInvalidatedListener(event -> {
  // Get the expired user's External ID
  String externalId = event.getExternalId();

  // Fetch a new JWT from your backend for the user
  String onesignalJWT = "yourUpdatedToken";

  // Provide the new JWT to the SDK
  OneSignal.updateUserJwt(externalId, onesignalJWT);
});