// on iOS and tvOS, use `application:didFinishLaunchingWithOptions:`
// on macOS and watchOS use `applicationDidFinishLaunching:` 

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
  
    Purchases.logLevel = .debug
    Purchases.configure(withAPIKey: <revenuecat_api_key>, appUserID: <app_user_id>)
  
}

// on iOS and tvOS, use `application:didFinishLaunchingWithOptions:`
// on macOS and watchOS use `applicationDidFinishLaunching:` 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    
    RCPurchases.logLevel = RCLogLevelDebug;
    [RCPurchases configureWithAPIKey:@<revenuecat_api_key> appUserID:<app_user_id>];
    
    return YES;
}

// If you're targeting only Google Play Store
class MainApplication: Application() {
    override fun onCreate() {
        super.onCreate()
        Purchases.logLevel = LogLevel.DEBUG
        Purchases.configure(PurchasesConfiguration.Builder(this, <public_google_sdk_key>).build())
    }
}

// If you're building for the Amazon Appstore, you can use flavors to determine which keys to use
// In your build.gradle:
flavorDimensions "store"
productFlavors {
    amazon {
        buildConfigField "String", "STORE", "\"amazon\""
    }

    google {
        buildConfigField "String", "STORE", "\"google\""
    }       
}

///...

class MainApplication: Application() {
    override fun onCreate() {
        super.onCreate()
        Purchases.logLevel = LogLevel.DEBUG
          
        if (BuildConfig.STORE.equals("amazon")) {
            Purchases.configure(AmazonConfiguration.Builder(this, <public_amazon_sdk_key>).build())
        } else if (BuildConfig.STORE.equals("google")) {
            Purchases.configure(PurchasesConfiguration.Builder(this, <public_google_sdk_key>).build())
        }
    }
}

// If you're targeting only Google Play Store
public class MainApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        Purchases.setLogLevel(LogLevel.DEBUG);
        Purchases.configure(new PurchasesConfiguration.Builder(this, <public_google_sdk_key>).build());
    }
}

// If you're building for the Amazon Appstore, 
// click the Kotlin tab to see how to set up flavors in your build.gradle:
///...

public class MainApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        Purchases.setLogLevel(LogLevel.DEBUG);
      
        PurchasesConfiguration.Builder builder = null;
      
        if (BuildConfig.STORE.equals("amazon")) {
            builder = new AmazonConfiguration.Builder(this, <public_amazon_sdk_key>);
        } else if (BuildConfig.STORE.equals("google")) {
            builder = new PurchasesConfiguration.Builder(this, <public_google_sdk_key>);
        }
      
        Purchases.configure(builder.build());
    }
}

import 'dart:io' show Platform;

//...

Future<void> initPlatformState() async {
  await Purchases.setDebugLogsEnabled(true);
  
  PurchasesConfiguration configuration;
  if (Platform.isAndroid) {
    configuration = PurchasesConfiguration(<public_google_sdk_key>);
    if (buildingForAmazon) { 
      // use your preferred way to determine if this build is for Amazon store
      // checkout our MagicWeather sample for a suggestion
      configuration = AmazonConfiguration(<public_amazon_sdk_key>);
    }
  } else if (Platform.isIOS) {
    configuration = PurchasesConfiguration(<public_ios_sdk_key>);
  }
  await Purchases.configure(configuration);
}

import { Platform } from 'react-native';

//...

export default class App extends React.Component {
 
  componentDidMount() {
    Purchases.setLogLevel(LOG_LEVEL.VERBOSE);
    
    if (Platform.OS === 'ios') {
       Purchases.configure({apiKey: <public_ios_sdk_key>});
    } else if (Platform.OS === 'android') {
       Purchases.configure({apiKey: <public_google_sdk_key>});
      
      // OR: if building for Amazon, be sure to follow the installation instructions then:
       Purchases.configure({ apiKey: <public_amazon_sdk_key>, useAmazon: true });
    }
    
  }
}

document.addEventListener("deviceready", onDeviceReady, false);

function onDeviceReady() {
    Purchases.setLogLevel(LOG_LEVEL.DEBUG);
    if (window.cordova.platformId === 'ios') {
        Purchases.configure(<public_ios_sdk_key>);
    } else if (window.cordova.platformId === 'android') {
        Purchases.configure(<public_google_sdk_key>);
    }
    // OR: if building for Amazon, be sure to follow the installation instructions then:
    await Purchases.configure({ apiKey: <public_amazon_sdk_key>, useAmazon: true });
}

See Unity installation instructions https://docs.revenuecat.com/docs/unity

Purchases.shared.getOfferings { (offerings, error) in
    if let offerings = offerings {
      // Display current offering with offerings.current
  }
}

[[RCPurchases sharedPurchases] getOfferingsWithCompletion:^(RCOfferings *offerings, NSError *error) {
  if (offerings) {
        // Display current offering with offerings.current
  } else if (error) {
    // optional error handling
  }
}];

Purchases.sharedInstance.getOfferingsWith(
    onError = { error ->
    /* Optional error handling */ 
  },
  onSuccess = { offerings ->  
    // Display current offering with offerings.current
    }
}

Purchases.getSharedInstance().getOfferings(new ReceiveOfferingsCallback() {

     @Override
     public void onReceived(@NonNull Offerings offerings) {
     }

     @Override
     public void onError(@NonNull PurchasesError error) {
        /* Optional error handling */
     }
});

try {
  Offerings offerings = await Purchases.getOfferings();
  if (offerings.current != null) {
    // Display current offering with offerings.current
  }
} on PlatformException catch (e) {
    // optional error handling
}

try {
  const offerings = await Purchases.getOfferings();
  if (offerings.current !== null) {  
      // Display current offering with offerings.current
  }
} catch (e) {

}

func displayUpsellScreen() {
  Purchases.getOfferings(
      offerings => {
        if (offerings.current !== null) {  
          // Display current offering with offerings.current
        }
      },
      error => {

      }
  );
}

var purchases = GetComponent<Purchases>();
purchases.GetOfferings((offerings, error) =>
{
  if (error != null) {
    LogError(error);
  } else if (offerings.Current != null {
    // Display current offering with offerings.current
  }
});

curl --request GET \
  --url https://api.revenuecat.com/v1/subscribers/<app_user_id>/offerings \
  --header 'Accept: application/json' \
  --header 'Authorization: Bearer REVENUECAT_API_KEY' \
  --header 'Content-Type: application/json' \
  --header 'X-Platform: stripe'

Purchases.shared.purchase(package: package) { (transaction, customerInfo, error, userCancelled) in
    if customerInfo?.entitlements.all[<your_entitlement_id>]?.isActive == true {
        // Unlock that great "pro" content
    }
}

[[RCPurchases sharedPurchases] purchasePackage:package withCompletion:^(RCStoreTransaction *transaction, RCCustomerInfo *customerInfo, NSError *error, BOOL cancelled) {
    if (customerInfo.entitlements.all[@<your_entitlement_id>].isActive) {
    // User is "premium"
    }
}];

Purchases.sharedInstance.purchaseWith(
  PurchaseParams.Builder(this, package).build(),
  onError = { error, userCancelled -> /* No purchase */ },
  onSuccess = { product, customerInfo ->
    if (customerInfo.entitlements[<my_entitlement_identifier>]?.isActive == true) {
    // Unlock that great "pro" content
  }
)

Purchases.getSharedInstance().purchase(
    new PurchaseParams.Builder(this, aPackage).build(), 
    new PurchaseCallback() {
    @Override
    public void onCompleted(@NonNull StoreTransaction storeTransaction, @NonNull CustomerInfo customerInfo) {
            if (customerInfo.getEntitlements().get(<my_entitlement_identifier>).isActive()) {
                // Unlock that great "pro" content
            }
        }

        @Override
        public void onError(@NonNull PurchasesError purchasesError, boolean b) {
            // No purchase
        }
    }
);

try {
  CustomerInfo customerInfo = await Purchases.purchasePackage(package);
  var isPro = customerInfo.entitlements.all[<my_entitlement_identifier>].isActive;
  if (isPro) {
    // Unlock that great "pro" content
  }
} on PlatformException catch (e) {
  var errorCode = PurchasesErrorHelper.getErrorCode(e);
  if (errorCode != PurchasesErrorCode.purchaseCancelledError) {
    showError(e);             
  }
}

// Using packages
try {
  const purchaseMade = await Purchases.purchasePackage(package);
  if (typeof purchaseMade.customerInfo.entitlements.active[<my_entitlement_identifier>] !== "undefined") {
    // Unlock that great "pro" content
  }
} catch (e) {
  if (!e.userCancelled) {
    showError(e);
  }
}

// Note: if you are using purchaseProduct to purchase Android In-app products, an optional third parameter needs to be provided when calling purchaseProduct. You can use the package system to avoid this
await Purchases.purchaseProduct(<product_id>, null, Purchases.PURCHASE_TYPE.INAPP);

Purchases.purchasePackage(package, ({ productIdentifier, customerInfo }) => {
    if (typeof customerInfo.entitlements.active[<my_entitlement_identifier>] !== "undefined") {
      // Unlock that great "pro" content
    }
  },
  ({error, userCancelled}) => {
    // Error making purchase
  }
);

// Note: if you are using purchaseProduct to purchase Android In-app products, an optional third parameter needs to be provided when calling purchaseProduct. You can use the package system to avoid this.

Purchases.purchaseProduct(<product_id>, ({ productIdentifier, customerInfo }) => {
}, ({error, userCancelled}) => {
    // Error making purchase
}, null, Purchases.PURCHASE_TYPE.INAPP);

Purchases purchases = GetComponent<Purchases>();
purchases.PurchasePackage(package, (productIdentifier, purchaserInfo, userCancelled, error) =>
{
  if (purchaserInfo.Entitlements.Active.ContainsKey(<my_entitlement_identifier>)) {
    // Unlock that great "pro" content
  }
});

curl -X POST \
  https://api.revenuecat.com/v1/receipts \
  -H 'Content-Type: application/json' \
  -H 'X-Platform: stripe' \
  -H 'Authorization: Bearer YOUR_REVENUECAT_API_KEY' \
  -d '{ "app_user_id": "my_app_user_id",
  "fetch_token": "sub_xxxxxxxxxx"
  }'

Purchases.shared.getCustomerInfo { (customerInfo, error) in
    if customerInfo?.entitlements.all[<your_entitlement_id>]?.isActive == true {
        // User is "premium"
    }
}

[[RCPurchases sharedPurchases] getCustomerInfoWithCompletion:^(RCPurchaserInfo * customerInfo, NSError * error) {
    if (customerInfo.entitlements.all[@<your_entitlement_id>].isActive) {
    // User is "premium"
    }
}];

Purchases.sharedInstance.getCustomerInfo({ error -> /* Optional error handling */ }) { customerInfo ->
  if (customerInfo.entitlements[<my_entitlement_identifier>]?.isActive == true) {
    // Grant user "pro" access
  }
}

Purchases.getSharedInstance().getCustomerInfo(new ReceiveCustomerInfoCallback() {
    @Override
    public void onReceived(@NonNull CustomerInfo customerInfo) {
        if (customerInfo.getEntitlements().get(<my_entitlement_identifier>).isActive()) {
            // Grant user "pro" access
        }
    }

    @Override
    public void onError(@NonNull PurchasesError purchasesError) {
    }
});

try {
  CustomerInfo customerInfo = await Purchases.getCustomerInfo();
  if (customerInfo.entitlements.all[<my_entitlement_identifier>].isActive) {
    // Grant user "pro" access
  }
} on PlatformException catch (e) {
  // Error fetching purchaser info
}

try {
  const customerInfo = await Purchases.getCustomerInfo();
  if(typeof customerInfo.entitlements.active[<my_entitlement_identifier>] !== "undefined") {
    // Grant user "pro" access
  }
} catch (e) {
 // Error fetching purchaser info
}

Purchases.getCustomerInfo(
  info => {
    const isPro = typeof customerInfo.entitlements.active[<my_entitlement_identifier>] !== "undefined";
  },
  error => {
    // Error fetching customer info
  }
);

var purchases = GetComponent<Purchases>();
purchases.GetPurchaserInfo((info, error) =>
{
   if (purchaserInfo.Entitlements.Active.ContainsKey(<my_entitlement_identifier>)) {
    // Unlock that great "pro" content
  }
});

curl --request GET \
  --url https://api.revenuecat.com/v1/subscribers/<app_user_id> \
  --header 'Accept: application/json' \
  --header 'Authorization: Bearer REVENUECAT_API_KEY' \
  --header 'Content-Type: application/json'

Purchases.shared.restorePurchases { (customerInfo, error) in
    //... check customerInfo to see if entitlement is now active
}

[[RCPurchases sharedPurchases] restorePurchasesWithCompletion:^(RCCustomerInfo *customerInfo, NSError *error) {
    //... check customerInfo to see if entitlement is now active
}];

Purchases.sharedInstance.restorePurchasesWith(::showError) { customerInfo ->
    //... check customerInfo to see if entitlement is now active
}

Purchases.getSharedInstance().restorePurchases(new ReceiveCustomerInfoCallback() {
    @Override
    public void onReceived(@NonNull CustomerInfo customerInfo) {
        //... check purchaserInfo to see if entitlement is now active   
    }

    @Override
    public void onError(@NonNull PurchasesError purchasesError) {

    }
});

try {
  CustomerInfo restoredInfo = await Purchases.restoreTransactions();
  // ... check restored customerInfo to see if entitlement is now active
} on PlatformException catch (e) {
  // Error restoring purchases
}

try {
  const restore = await Purchases.restorePurchases();
  // ... check restored customerInfo to see if entitlement is now active
} catch (e) {

}

Purchases.restoreTransactions(
  info => {
    //... check customerInfo to see if entitlement is now active
  },
  error => {
    // Error restoring purchases
  }
);

var purchases = GetComponent<Purchases>();
purchases.RestoreTransactions((info, error) =>
{
    //... check purchaserInfo to see if entitlement is now active
});

// Additional configure setup
// on iOS and tvOS, use `application:didFinishLaunchingWithOptions:`
// on macOS and watchOS use `applicationDidFinishLaunching:` 

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
  
    Purchases.logLevel = .debug
    Purchases.configure(withAPIKey: <revenuecat_api_key>)
    Purchases.shared.delegate = self // make sure to set this after calling configure
    
    return true
}

extension AppDelegate: PurchasesDelegate {
    func purchases(_ purchases: Purchases, receivedUpdated customerInfo: CustomerInfo) {
        /// - handle any changes to the user's CustomerInfo
    }
}

// Additional configure setup
// on iOS and tvOS, use `application:didFinishLaunchingWithOptions:`
// on macOS and watchOS use `applicationDidFinishLaunching:`

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    RCPurchases.logLevel = RCLogLevelDebug;
    [RCPurchases configureWithAPIKey:@<revenuecat_api_key>];
    RCPurchases.sharedPurchases.delegate = self;

    return YES;
}

- (void)purchases:(nonnull RCPurchases *)purchases receivedUpdatedCustomerInfo:(nonnull RCCustomerInfo *)customerInfo {
    // handle any changes to purchaserInfo
}

class UpsellActivity : AppCompatActivity(), UpdatedCustomerInfoListener {
        override fun onReceived(customerInfo: CustomerInfo) {
        // handle any changes to purchaserInfo
    }
}

public class UpsellActivity extends AppCompatActivity implements UpdatedCustomerInfoListener {
        @Override
    public void onReceived(CustomerInfo customerInfo) {
        // handle any changes to customerInfo
    }
}

Purchases.addPurchaserInfoUpdateListener((purchaserInfo) => {
  // handle any changes to purchaserInfo
});

Purchases.addCustomerInfoUpdateListener(info => {
    // handle any changes to purchaserInfo
});

// subscribe to the window event onCustomerInfoUpdated to get any changes that happen in the customerInfo
window.addEventListener("onCustomerInfoUpdated", onCustomerInfoUpdated, false);

//...

onCustomerInfoUpdated: function(info) {
    // handle any changes to customerInfo
}

public override void PurchaserInfoReceived(Purchases.PurchaserInfo purchaserInfo)
{
    // handle any changes to purchaserInfo
}