var iap = require('in-app-purchase');
iap.config({
	
	/* Configurations for Amazon Store */
	amazonAPIVersion: 2, // tells the module to use API version 2
	secret: 'abcdefghijklmnoporstuvwxyz', // this comes from Amazon
	
	/* Configurations for Apple */
	applePassword: 'abcdefg...', // this comes from iTunes Connect (You need this to valiate subscriptions)	
	
	/* Configurations for Google Play */
	googlePublicKeyPath: 'path/to/public/key/directory/' // this is the path to the directory containing iap-sanbox/iap-live files
	googleAccToken: 'abcdef...', // optional, for Google Play subscriptions
	googleRefToken: 'dddd...', // optional, for Google Play subscritions
	googleClientID: 'aaaa', // optional, for Google Play subscriptions
	googleClientSecret: 'bbbb', // optional, for Google Play subscriptions

	/* Configurations for Roku */
	rokuApiKey: 'aaaa...', // this comes from Roku Developer Dashboard
	
	/* Configurations all platforms */
	test: true, // For Apple and Googl Play to force Sandbox validation only
	verbose: true // Output debug logs to stdout stream 
});
iap.setup()
  .then(() => {
    // iap.validate(...) automatically detects what type of receipt you are trying to validate
    iap.validate(receipt).then(onSuccess).catch(onError);
  })
  .catch((error) => {
    // error...
  });

function onSuccess(receipt, validatedData) {
	// receipt: it is the receipt that was validated...
	// validatedData: the actual content of the validated receipt
	var options = {
		ignoreCanceled: true, // Apple ONLY (for now...): purchaseData will NOT contain cancceled items
		ignoreExpired: true // purchaseData will NOT contain exipired subscription items
	};
	var purchaseData = iap.getPurchaseData(validateData, options);
}

function onError(error) {
	// failed to validate the receipt...
}

iap.config(configObject);
iap.setup()
  .then(() => {
    iap.validateOnce(receipt, pubKeyString).then(onSuccess).catch(onError);
  })
  .catch((error) => {
    // error...
  });

iap.config(configObject);
iap.setup()
  .then(() => {
    iap.validateOnce(receipt, appleSecretString).then(onSuccess).catch(onError);
  })
  .catch((error) => {
    // error...
  });

iap.config(configObject);
iap.setup()
  .then(() => {
    iap.validateOnce(receipt, amazonSecretString).then(onSuccess).catch(onError);
  })
  .catch((error) => {
    // error...
  });

iap.config(configObject);
iap.setup()
  .then(() => {
    iap.validateOnce(receipt, rokuApiKeyString).then(onSuccess).catch(onError);
  })
  .catch((error) => {
    // error...
  });