NodeJS ServerSide Google Play Purchase Validation

index.js

var Verifier = require('google-play-billing-validator')


var options = {
  "key": "Private Key Here",
  "email": "service account email",
}

var verifier = new Verifier(options);

// this is the tings you need to change
let receipt = {
  packageName: "app package name", // app packagename
  productId: "sub/product id", // product or sub id 
  purchaseToken: "purchase token" // purchase token
};

let promiseData = verifier.verifySub(receipt)


promiseData.then(function (response) {
    console.log(response);
    // Yay! Purchase is valid
    // See response structure below

    /*
    Response Data
    *
    *
    { isSuccessful: true, errorMessage: null, payload: { kind:
    'androidpublisher#subscriptionPurchase', startTimeMillis: '1559996454334',
    expiryTimeMillis: '1559997588984', autoRenewing: true, priceCurrencyCode: 'MYR',
    priceAmountMicros: '20990000', countryCode: 'MY', developerPayload: '',
    paymentState: 1, orderId: 'GPA.3303-7376-1225-04672..1', purchaseType: 0,
    acknowledgementState: 1 } }
     */

    //  Perform success operation
  })
  .catch(function (error) {
    console.log("-------------------- Error ----------")
    console.log(response);
    // Purchase is not valid or API error
    // See possible error messages below
  })

https://www.npmjs.com/package/google-play-billing-validator