purchases.ts

import {NativeEventEmitter, NativeModules} from "react-native";
import {PurchasesError, PURCHASES_ERROR_CODE, UninitializedPurchasesError, UnsupportedPlatformError} from "./errors";
import {CustomerInfo, PurchasesEntitlementInfo} from "./customerInfo";
import {
  PRORATION_MODE,
  PACKAGE_TYPE,
  INTRO_ELIGIBILITY_STATUS,
  PurchasesOfferings,
  PurchasesStoreProduct,
  UpgradeInfo,
  PurchasesPromotionalOffer,
  PurchasesPackage,
  IntroEligibility,
  PurchasesStoreProductDiscount,
  SubscriptionOption,
  PRODUCT_CATEGORY,
  GoogleProductChangeInfo
} from "./offerings";

import {Platform} from "react-native";

const {RNPurchases} = NativeModules;
const eventEmitter = new NativeEventEmitter(RNPurchases);

/**
 * Listener used on updated customer info
 * @callback CustomerInfoUpdateListener
 * @param {Object} customerInfo Object containing info for the customer
 */
export type CustomerInfoUpdateListener = (customerInfo: CustomerInfo) => void;
export type ShouldPurchasePromoProductListener = (deferredPurchase: () => Promise<MakePurchaseResult>) => void;
export type MakePurchaseResult = { productIdentifier: string; customerInfo: CustomerInfo; };
export type LogHandler = (logLevel: LOG_LEVEL, message: string) => void;

let customerInfoUpdateListeners: CustomerInfoUpdateListener[] = [];
let shouldPurchasePromoProductListeners: ShouldPurchasePromoProductListener[] = [];
let customLogHandler: LogHandler;

eventEmitter.addListener(
  "Purchases-CustomerInfoUpdated",
  (customerInfo: CustomerInfo) => {
    customerInfoUpdateListeners.forEach(listener => listener(customerInfo));
  }
);

eventEmitter.addListener(
  "Purchases-ShouldPurchasePromoProduct",
  ({callbackID}: { callbackID: number }) => {
    shouldPurchasePromoProductListeners.forEach(listener =>
      listener(() => RNPurchases.makeDeferredPurchase(callbackID))
    );
  }
);

eventEmitter.addListener(
  "Purchases-LogHandlerEvent",
  ({logLevel, message}: { logLevel: LOG_LEVEL, message: string }) => {
    const logLevelEnum = LOG_LEVEL[logLevel];
    customLogHandler(logLevelEnum, message);
  }
);

/**
 * @deprecated, use PRODUCT_CATEGORY
 */
export enum PURCHASE_TYPE {
  /**
   * A type of SKU for in-app products.
   */
  INAPP = "inapp",

  /**
   * A type of SKU for subscriptions.
   */
  SUBS = "subs",
}

/**
 * Enum for billing features.
 * Currently, these are only relevant for Google Play Android users:
 * https://developer.android.com/reference/com/android/billingclient/api/BillingClient.FeatureType
 */
export enum BILLING_FEATURE {
  /**
   * Purchase/query for subscriptions.
   */
  SUBSCRIPTIONS,

  /**
   * Subscriptions update/replace.
   */
  SUBSCRIPTIONS_UPDATE,

  /**
   * Purchase/query for in-app items on VR.
   */
  IN_APP_ITEMS_ON_VR,

  /**
   * Purchase/query for subscriptions on VR.
   */
  SUBSCRIPTIONS_ON_VR,

  /**
   * Launch a price change confirmation flow.
   */
  PRICE_CHANGE_CONFIRMATION,
}

export enum REFUND_REQUEST_STATUS {
  /**
   * Apple has received the refund request.
   */
  SUCCESS,

  /**
   * User canceled submission of the refund request.
   */
  USER_CANCELLED,

  /**
   * There was an error with the request. See message for more details.
   */
  ERROR
}

/**
 * Holds the logIn result
 */
export interface LogInResult {
  /**
   * The Customer Info for the user.
   */
  readonly customerInfo: CustomerInfo;
  /**
   * True if the call resulted in a new user getting created in the RevenueCat backend.
   */
  readonly created: boolean;
}

export enum LOG_LEVEL {
  VERBOSE = "VERBOSE",
  DEBUG = "DEBUG",
  INFO = "INFO",
  WARN = "WARN",
  ERROR = "ERROR"
}

/**
 * Holds parameters to initialize the SDK.
 */
export interface PurchasesConfiguration {
  /**
   * RevenueCat API Key. Needs to be a string
   */
  apiKey: string;
  /**
   * A unique id for identifying the user
   */
  appUserID?: string | null;
  /**
   * An optional boolean. Set this to TRUE if you have your own IAP implementation and
   * want to use only RevenueCat's backend. Default is FALSE. If you are on Android and setting this to ON, you will have
   * to acknowledge the purchases yourself.
   */
  observerMode?: boolean;
  /**
   * An optional string. iOS-only, will be ignored for Android.
   * Set this if you would like the RevenueCat SDK to store its preferences in a different NSUserDefaults
   * suite, otherwise it will use standardUserDefaults. Default is null, which will make the SDK use standardUserDefaults.
   */
  userDefaultsSuiteName?: string;
  /**
   * iOS-only, will be ignored for Android.
   * Set this to TRUE to enable StoreKit2.
   * Default is FALSE.
   * 
   * @deprecated RevenueCat currently uses StoreKit 1 for purchases, as its stability in production scenarios has
   * proven to be more performant than StoreKit 2.
   * We're collecting more data on the best approach, but StoreKit 1 vs StoreKit 2 is an implementation detail
   * that you shouldn't need to care about.
   * We recommend not using this parameter, letting RevenueCat decide for you which StoreKit implementation to use.
   */
  usesStoreKit2IfAvailable?: boolean;
  /**
   * An optional boolean. Android only. Required to configure the plugin to be used in the Amazon Appstore.
   */
  useAmazon?: boolean;
}

export default class Purchases {
  /**
   * Supported SKU types.
   * @readonly
   * @enum {string}
   * @deprecated, use PRODUCT_CATEGORY
   */
  public static PURCHASE_TYPE = PURCHASE_TYPE;

  /**
   * Supported product categories.
   * @readonly
   * @enum {string}
   */
  public static PRODUCT_CATEGORY = PRODUCT_CATEGORY;

  /**
   * Enum for billing features.
   * Currently, these are only relevant for Google Play Android users:
   * https://developer.android.com/reference/com/android/billingclient/api/BillingClient.FeatureType
   * @readonly
   * @enum {string}
   */
  public static BILLING_FEATURE = BILLING_FEATURE;

  /**
   * Enum with possible return states for beginning refund request.
   * @readonly
   * @enum {string}
   */
  public static REFUND_REQUEST_STATUS = REFUND_REQUEST_STATUS;

  /**
   * Replace SKU's ProrationMode.
   * @readonly
   * @enum {number}
   */
  public static PRORATION_MODE = PRORATION_MODE;

  /**
   * Enumeration of all possible Package types.
   * @readonly
   * @enum {string}
   */
  public static PACKAGE_TYPE = PACKAGE_TYPE;

  /**
   * Enum of different possible states for intro price eligibility status.
   * @readonly
   * @enum {number}
   */
  public static INTRO_ELIGIBILITY_STATUS = INTRO_ELIGIBILITY_STATUS;

  /**
   * Enum of all error codes the SDK produces.
   * @readonly
   * @enum {string}
   */
  public static PURCHASES_ERROR_CODE = PURCHASES_ERROR_CODE;

  /**
   * List of valid log levels.
   * @readonly
   * @enum {string}
   */
  public static LOG_LEVEL = LOG_LEVEL;

  /**
   * @internal
   */
  public static UninitializedPurchasesError = UninitializedPurchasesError;

  /**
   * @internal
   */
  public static UnsupportedPlatformError = UnsupportedPlatformError;

  /**
   * Sets up Purchases with your API key and an app user id.
   * @param {String} apiKey RevenueCat API Key. Needs to be a String
   * @param {String?} appUserID An optional unique id for identifying the user. Needs to be a string.
   * @param {boolean} [observerMode=false] An optional boolean. Set this to TRUE if you have your own IAP implementation and want to use only RevenueCat's backend. Default is FALSE.
   * @param {boolean} [usesStoreKit2IfAvailable=false] DEPRECATED. An optional boolean. iOS-only. Defaults to FALSE. Setting this to TRUE will enable StoreKit2 on compatible devices. 
   * We recommend not using this parameter, letting RevenueCat decide for you which StoreKit implementation to use.
   * @param {boolean} [useAmazon=false] An optional boolean. Android-only. Set this to TRUE to enable Amazon on compatible devices.
   * @param {String?} userDefaultsSuiteName An optional string. iOS-only, will be ignored for Android.
   * Set this if you would like the RevenueCat SDK to store its preferences in a different NSUserDefaults suite, otherwise it will use standardUserDefaults.
   * Default is null, which will make the SDK use standardUserDefaults.
   */
  public static configure({
                            apiKey,
                            appUserID = null,
                            observerMode = false,
                            userDefaultsSuiteName,
                            usesStoreKit2IfAvailable = false,
                            useAmazon = false
                          }: PurchasesConfiguration): void {
    if (apiKey === undefined || typeof apiKey !== "string") {
      throw new Error("Invalid API key. It must be called with an Object: configure({apiKey: \"key\"})");
    }

    if (appUserID !== null && typeof appUserID !== "undefined" && typeof appUserID !== "string") {
      throw new Error("appUserID needs to be a string");
    }
    RNPurchases.setupPurchases(
      apiKey,
      appUserID,
      observerMode,
      userDefaultsSuiteName,
      usesStoreKit2IfAvailable,
      useAmazon
    );
  }

  /**
   * @deprecated, configure behavior through the RevenueCat dashboard instead.
   * If an user tries to purchase a product that is active on the current app store account,
   * we will treat it as a restore and alias the new ID with the previous id.
   * @param {boolean} allowSharing Set this to true if you are passing in an appUserID but it is anonymous,
   * this is true by default if you didn't pass an appUserID
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet.
   */
  public static async setAllowSharingStoreAccount(allowSharing: boolean): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setAllowSharingStoreAccount(allowSharing);
  }

  /**
   * @param {boolean} finishTransactions Set finishTransactions to false if you aren't using Purchases SDK to
   * make the purchase
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet.
   */
  public static async setFinishTransactions(finishTransactions: boolean): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setFinishTransactions(finishTransactions);
  }

  /**
   * iOS only.
   * @param {boolean} simulatesAskToBuyInSandbox Set this property to true *only* when testing the ask-to-buy / SCA
   * purchases flow. More information: http://errors.rev.cat/ask-to-buy
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet.
   */
  public static async setSimulatesAskToBuyInSandbox(simulatesAskToBuyInSandbox: boolean): Promise<void> {
    if (Platform.OS === "ios") {
      RNPurchases.setSimulatesAskToBuyInSandbox(simulatesAskToBuyInSandbox);
    }
  }

  /**
   * Sets a function to be called on updated customer info
   * @param {CustomerInfoUpdateListener} customerInfoUpdateListener CustomerInfo update listener
   */
  public static addCustomerInfoUpdateListener(
    customerInfoUpdateListener: CustomerInfoUpdateListener
  ): void {
    if (typeof customerInfoUpdateListener !== "function") {
      throw new Error("addCustomerInfoUpdateListener needs a function");
    }
    customerInfoUpdateListeners.push(customerInfoUpdateListener);
  }

  /**
   * Removes a given CustomerInfoUpdateListener
   * @param {CustomerInfoUpdateListener} listenerToRemove CustomerInfoUpdateListener reference of the listener to remove
   * @returns {boolean} True if listener was removed, false otherwise
   */
  public static removeCustomerInfoUpdateListener(
    listenerToRemove: CustomerInfoUpdateListener
  ): boolean {
    if (customerInfoUpdateListeners.includes(listenerToRemove)) {
      customerInfoUpdateListeners = customerInfoUpdateListeners.filter(
        listener => listenerToRemove !== listener
      );
      return true;
    }
    return false;
  }

  /**
   * Sets a function to be called on purchases initiated on the Apple App Store. This is only used in iOS.
   * @param {ShouldPurchasePromoProductListener} shouldPurchasePromoProductListener Called when a user initiates a
   * promotional in-app purchase from the App Store. If your app is able to handle a purchase at the current time, run
   * the deferredPurchase function. If the app is not in a state to make a purchase: cache the deferredPurchase, then
   * call the deferredPurchase when the app is ready to make the promotional purchase.
   * If the purchase should never be made, you don't need to ever call the deferredPurchase and the app will not
   * proceed with promotional purchases.
   */
  public static addShouldPurchasePromoProductListener(
    shouldPurchasePromoProductListener: ShouldPurchasePromoProductListener
  ): void {
    if (typeof shouldPurchasePromoProductListener !== "function") {
      throw new Error("addShouldPurchasePromoProductListener needs a function");
    }
    shouldPurchasePromoProductListeners.push(shouldPurchasePromoProductListener);
  }

  /**
   * Removes a given ShouldPurchasePromoProductListener
   * @param {ShouldPurchasePromoProductListener} listenerToRemove ShouldPurchasePromoProductListener reference of
   * the listener to remove
   * @returns {boolean} True if listener was removed, false otherwise
   */
  public static removeShouldPurchasePromoProductListener(
    listenerToRemove: ShouldPurchasePromoProductListener
  ): boolean {
    if (shouldPurchasePromoProductListeners.includes(listenerToRemove)) {
      shouldPurchasePromoProductListeners = shouldPurchasePromoProductListeners.filter(
        listener => listenerToRemove !== listener
      );
      return true;
    }
    return false;
  }

  /**
   * Gets the map of entitlements -> offerings -> products
   * @returns {Promise<PurchasesOfferings>} Promise of entitlements structure. The promise will be rejected if configure
   * has not been called yet.
   */
  public static async getOfferings(): Promise<PurchasesOfferings> {
    await Purchases.throwIfNotConfigured();
    return RNPurchases.getOfferings();
  }

  /**
   * Fetch the product info
   * @param {String[]} productIdentifiers Array of product identifiers
   * @param {String} type Optional type of products to fetch, can be SUBSCRIPTION or NON_SUBSCRIPTION. SUBSCRIPTION by default
   * @returns {Promise<PurchasesStoreProduct[]>} A promise containing an array of products. The promise will be rejected
   * if the products are not properly configured in RevenueCat or if there is another error retrieving them.
   * Rejections return an error code, and a userInfo object with more information. The promise will also be rejected
   * if configure has not been called yet.
   */
  public static async getProducts(
    productIdentifiers: string[],
    type: PURCHASE_TYPE | PRODUCT_CATEGORY = PRODUCT_CATEGORY.SUBSCRIPTION
  ): Promise<PurchasesStoreProduct[]> {
    await Purchases.throwIfNotConfigured();
    return RNPurchases.getProductInfo(productIdentifiers, type);
  }

  /**
   * Make a purchase
   *
   * @param {String} productIdentifier The product identifier of the product you want to purchase
   * @param {UpgradeInfo} upgradeInfo Android only. Optional UpgradeInfo you wish to upgrade from containing the oldSKU
   * and the optional prorationMode.
   * @param {String} type Optional type of product, can be inapp or subs. Subs by default
   * @deprecated, use purchaseStoreProduct instead
   */
  public static async purchaseProduct(
    productIdentifier: string,
    upgradeInfo?: UpgradeInfo | null,
    type: PURCHASE_TYPE = PURCHASE_TYPE.SUBS,
  ): Promise<MakePurchaseResult> {
    await Purchases.throwIfNotConfigured();
    return RNPurchases.purchaseProduct(
      productIdentifier,
      upgradeInfo,
      type,
      null,
      null,
      null
    ).catch((error: PurchasesError) => {
      error.userCancelled = error.code === PURCHASES_ERROR_CODE.PURCHASE_CANCELLED_ERROR;
      throw error;
    });
  }

  /**
   * Make a purchase
   *
   * @param {PurchasesStoreProduct} product The product you want to purchase
   * @param {GoogleProductChangeInfo} googleProductChangeInfo Android only. Optional GoogleProductChangeInfo you 
   * wish to upgrade from containing the oldProductIdentifier and the optional prorationMode.
   * @param {boolean} googleIsPersonalizedPrice Android and Google only. Optional boolean indicates personalized pricing on products available for purchase in the EU.
   * For compliance with EU regulations. User will see "This price has been customize for you" in the purchase dialog when true.
   * See https://developer.android.com/google/play/billing/integrate#personalized-price for more info.
   * @returns {Promise<{ productIdentifier: string, customerInfo:CustomerInfo }>} A promise of an object containing
   * a customer info object and a product identifier. Rejections return an error code,
   * a boolean indicating if the user cancelled the purchase, and an object with more information. The promise will
   * also be rejected if configure has not been called yet.
   */
  public static async purchaseStoreProduct(
    product: PurchasesStoreProduct,
    googleProductChangeInfo?: GoogleProductChangeInfo | null,
    googleIsPersonalizedPrice?: boolean | null,
  ): Promise<MakePurchaseResult> {
    await Purchases.throwIfNotConfigured();
    return RNPurchases.purchaseProduct(
      product.identifier,
      googleProductChangeInfo,
      product.productCategory,
      null,
      googleIsPersonalizedPrice == null ? null : {isPersonalizedPrice: googleIsPersonalizedPrice},
      product.presentedOfferingIdentifier
    ).catch((error: PurchasesError) => {
      error.userCancelled = error.code === PURCHASES_ERROR_CODE.PURCHASE_CANCELLED_ERROR;
      throw error;
    });
  }

  /**
   * iOS only. Purchase a product applying a given discount.
   *
   * @param {PurchasesStoreProduct} product The product you want to purchase
   * @param {PurchasesPromotionalOffer} discount Discount to apply to this package. Retrieve this discount using getPromotionalOffer.
   * @param {boolean} googleIsPersonalizedPrice Android and Google only. Optional boolean indicates personalized pricing on products available for purchase in the EU.
   * For compliance with EU regulations. User will see "This price has been customize for you" in the purchase dialog when true.
   * See https://developer.android.com/google/play/billing/integrate#personalized-price for more info.
   * @returns {Promise<{ productIdentifier: string, customerInfo:CustomerInfo }>} A promise of an object containing
   * a customer info object and a product identifier. Rejections return an error code,
   * a boolean indicating if the user cancelled the purchase, and an object with more information. The promise will be
   * rejected if configure has not been called yet.
   */
  public static async purchaseDiscountedProduct(
    product: PurchasesStoreProduct,
    discount: PurchasesPromotionalOffer,
  ): Promise<MakePurchaseResult> {
    await Purchases.throwIfNotConfigured();
    if (typeof discount === "undefined" || discount == null) {
      throw new Error("A discount is required");
    }
    return RNPurchases.purchaseProduct(
      product.identifier,
      null,
      null,
      discount.timestamp.toString(),
      null,
      product.presentedOfferingIdentifier
    ).catch((error: PurchasesError) => {
      error.userCancelled = error.code === PURCHASES_ERROR_CODE.PURCHASE_CANCELLED_ERROR;
      throw error;
    });
  }

  /**
   * Make a purchase
   *
   * @param {PurchasesPackage} aPackage The Package you wish to purchase. You can get the Packages by calling getOfferings
   * @param {UpgradeInfo} upgradeInfo DEPRECATED. Use googleProductChangeInfo.
   * @param {GoogleProductChangeInfo} googleProductChangeInfo Android only. Optional GoogleProductChangeInfo you 
   * wish to upgrade from containing the oldProductIdentifier and the optional prorationMode.
   * @param {boolean} googleIsPersonalizedPrice Android and Google only. Optional boolean indicates personalized pricing on products available for purchase in the EU.
   * For compliance with EU regulations. User will see "This price has been customize for you" in the purchase dialog when true.
   * See https://developer.android.com/google/play/billing/integrate#personalized-price for more info.
   * @returns {Promise<{ productIdentifier: string, customerInfo: CustomerInfo }>} A promise of an object containing
   * a customer info object and a product identifier. Rejections return an error code, a boolean indicating if the
   * user cancelled the purchase, and an object with more information. The promise will be also be rejected if configure
   * has not been called yet.
   */
  public static async purchasePackage(
    aPackage: PurchasesPackage,
    upgradeInfo?: UpgradeInfo | null,
    googleProductChangeInfo?: GoogleProductChangeInfo | null,
    googleIsPersonalizedPrice?: boolean | null,
  ): Promise<MakePurchaseResult> {
    await Purchases.throwIfNotConfigured();
    return RNPurchases.purchasePackage(
      aPackage.identifier,
      aPackage.offeringIdentifier,
      googleProductChangeInfo || upgradeInfo,
      null,
      googleIsPersonalizedPrice == null ? null : {isPersonalizedPrice: googleIsPersonalizedPrice},
    ).catch((error: PurchasesError) => {
      error.userCancelled = error.code === PURCHASES_ERROR_CODE.PURCHASE_CANCELLED_ERROR;
      throw error;
    });
  }

  /**
   * Google only. Make a purchase of a subscriptionOption
   *
   * @param {SubscriptionOption} subscriptionOption The SubscriptionOption you wish to purchase. You can get the SubscriptionOption from StoreProducts by calling getOfferings
   * @param {GoogleProductChangeInfo} googleProductChangeInfo Android only. Optional GoogleProductChangeInfo you 
   * wish to upgrade from containing the oldProductIdentifier and the optional prorationMode.
   * @param {boolean} googleIsPersonalizedPrice Android and Google only. Optional boolean indicates personalized pricing on products available for purchase in the EU.
   * For compliance with EU regulations. User will see "This price has been customize for you" in the purchase dialog when true.
   * See https://developer.android.com/google/play/billing/integrate#personalized-price for more info.
   * @returns {Promise<{ productIdentifier: string, customerInfo: CustomerInfo }>} A promise of an object containing
   * a customer info object and a product identifier. Rejections return an error code, a boolean indicating if the
   * user cancelled the purchase, and an object with more information. The promise will be also be rejected if configure
   * has not been called yet.
   */
  public static async purchaseSubscriptionOption(
    subscriptionOption: SubscriptionOption,
    googleProductChangeInfo?: GoogleProductChangeInfo,
    googleIsPersonalizedPrice?: boolean,
  ): Promise<MakePurchaseResult> {
    await Purchases.throwIfNotConfigured();
    await Purchases.throwIfIOSPlatform();
    return RNPurchases.purchaseSubscriptionOption(
      subscriptionOption.productId,
      subscriptionOption.id,
      googleProductChangeInfo,
      null,
      googleIsPersonalizedPrice == null ? null : {isPersonalizedPrice: googleIsPersonalizedPrice},
      subscriptionOption.presentedOfferingIdentifier
    ).catch((error: PurchasesError) => {
      error.userCancelled = error.code === PURCHASES_ERROR_CODE.PURCHASE_CANCELLED_ERROR;
      throw error;
    });
  }

  /**
   * iOS only. Purchase a package applying a given discount.
   *
   * @param {PurchasesPackage} aPackage The Package you wish to purchase. You can get the Packages by calling getOfferings
   * @param {PurchasesPromotionalOffer} discount Discount to apply to this package. Retrieve this discount using getPromotionalOffer.
   * @returns {Promise<{ productIdentifier: string, customerInfo: CustomerInfo }>} A promise of an object containing
   * a customer info object and a product identifier. Rejections return an error code, a boolean indicating if the
   * user cancelled the purchase, and an object with more information. The promise will be also be rejected if configure
   * has not been called yet.
   */
  public static async purchaseDiscountedPackage(
    aPackage: PurchasesPackage,
    discount: PurchasesPromotionalOffer
  ): Promise<MakePurchaseResult> {
    await Purchases.throwIfNotConfigured();
    if (typeof discount === "undefined" || discount == null) {
      throw new Error("A discount is required");
    }
    return RNPurchases.purchasePackage(
      aPackage.identifier,
      aPackage.offeringIdentifier,
      null,
      discount.timestamp.toString()
    ).catch((error: PurchasesError) => {
      error.userCancelled = error.code === PURCHASES_ERROR_CODE.PURCHASE_CANCELLED_ERROR;
      throw error;
    });
  }

  /**
   * Restores a user's previous purchases and links their appUserIDs to any user's also using those purchases.
   * @returns {Promise<CustomerInfo>} A promise of a customer info object. Rejections return an error code, and an
   * userInfo object with more information. The promise will be also be rejected if configure has not been called yet.
   */
  public static async restorePurchases(): Promise<CustomerInfo> {
    await Purchases.throwIfNotConfigured();
    return RNPurchases.restorePurchases();
  }

  /**
   * Get the appUserID
   * @returns {Promise<string>} The app user id in a promise
   */
  public static async getAppUserID(): Promise<string> {
    await Purchases.throwIfNotConfigured();
    return RNPurchases.getAppUserID();
  }

  /**
   * This function will logIn the current user with an appUserID. Typically this would be used after a log in
   * to identify a user without calling configure.
   * @param {String} appUserID The appUserID that should be linked to the currently user
   * @returns {Promise<LogInResult>} A promise of an object that contains the customerInfo after logging in, as well
   * as a boolean indicating whether the user has just been created for the first time in the RevenueCat backend. The
   * promise will be rejected if configure has not been called yet or if there's an issue logging in.
   */
  public static async logIn(appUserID: string): Promise<LogInResult> {
    await Purchases.throwIfNotConfigured();
    // noinspection SuspiciousTypeOfGuard
    if (typeof appUserID !== "string") {
      throw new Error("appUserID needs to be a string");
    }
    return RNPurchases.logIn(appUserID);
  }

  /**
   * Logs out the Purchases client clearing the saved appUserID. This will generate a random user id and save it in the cache.
   * @returns {Promise<CustomerInfo>} A promise of a customer info object. Rejections return an error code,
   * and a userInfo object with more information. The promise will be rejected if configure has not been called yet or if
   * there's an issue logging out.
   */
  public static async logOut(): Promise<CustomerInfo> {
    await Purchases.throwIfNotConfigured();
    return RNPurchases.logOut();
  }

  /**
   * Enables/Disables debugs logs
   * @param {boolean} enabled Enable or not debug logs
   * @deprecated, use setLogLevel instead
   */
  public static async setDebugLogsEnabled(enabled: boolean): Promise<void> {
    RNPurchases.setDebugLogsEnabled(enabled);
  }

  /**
   * Used to set the log level. Useful for debugging issues with the lovely team @RevenueCat.
   * The default is {LOG_LEVEL.INFO} in release builds and {LOG_LEVEL.DEBUG} in debug builds.
   * @param {LOG_LEVEL} level
   */
  public static async setLogLevel(level: LOG_LEVEL): Promise<void> {
    RNPurchases.setLogLevel(level);
  }

  /**
   * Set a custom log handler for redirecting logs to your own logging system.
   * By default, this sends info, warning, and error messages.
   * If you wish to receive Debug level messages, see [setLogLevel].
   * @param {LogHandler} logHandler It will get called for each log event.
   * Use this function to redirect the log to your own logging system
   */
  public static setLogHandler(logHandler: LogHandler): void {
    customLogHandler = logHandler;
    RNPurchases.setLogHandler();
  }

  /**
   * Gets current customer info
   * @returns {Promise<CustomerInfo>} A promise of a customer info object. Rejections return an error code, and an
   * userInfo object with more information. The promise will be rejected if configure has not been called yet or if
   * there's an issue getting the customer information.
   */
  public static async getCustomerInfo(): Promise<CustomerInfo> {
    await Purchases.throwIfNotConfigured();
    return RNPurchases.getCustomerInfo();
  }

  /**
   * This method will send all the purchases to the RevenueCat backend. Call this when using your own implementation
   * for subscriptions anytime a sync is needed, like after a successful purchase.
   *
   * @warning This function should only be called if you're not calling purchaseProduct/purchaseStoreProduct/purchasePackage/purchaseSubscriptionOption.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * syncing purchases.
   */
  public static async syncPurchases(): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.syncPurchases();
  }

  /**
   * This method will send a purchase to the RevenueCat backend. This function should only be called if you are
   * in Amazon observer mode or performing a client side migration of your current users to RevenueCat.
   *
   * The receipt IDs are cached if successfully posted so they are not posted more than once.
   *
   * @param {string} productID Product ID associated to the purchase.
   * @param {string} receiptID ReceiptId that represents the Amazon purchase.
   * @param {string} amazonUserID Amazon's userID. This parameter will be ignored when syncing a Google purchase.
   * @param {(string|null|undefined)} isoCurrencyCode Product's currency code in ISO 4217 format.
   * @param {(number|null|undefined)} price Product's price.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * syncing purchases.
   */
  public static async syncObserverModeAmazonPurchase(productID: string, receiptID: string,
                                                     amazonUserID: string, isoCurrencyCode?: string | null,
                                                     price?: number | null): Promise<void> {
    await Purchases.throwIfIOSPlatform();
    await Purchases.throwIfNotConfigured();
    RNPurchases.syncObserverModeAmazonPurchase(productID, receiptID, amazonUserID, isoCurrencyCode, price);
  }

  /**
   * @deprecated, use enableAdServicesAttributionTokenCollection instead.
   * Enable automatic collection of Apple Search Ad attribution. Disabled by default
   * @param {boolean} enabled Enable or not automatic apple search ads attribution collection
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet.
   */
  public static async setAutomaticAppleSearchAdsAttributionCollection(
    enabled: boolean
  ): Promise<void> {
    if (Platform.OS === "ios") {
      RNPurchases.setAutomaticAppleSearchAdsAttributionCollection(enabled);
    }
  }

  /**
   * Enable automatic collection of Apple Search Ad attribution on iOS. Disabled by default
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet.
   */
  public static async enableAdServicesAttributionTokenCollection(): Promise<void> {
    if (Platform.OS === "ios") {
      await Purchases.throwIfNotConfigured();
      RNPurchases.enableAdServicesAttributionTokenCollection();
    }
  }

  /**
   * @returns { Promise<boolean> } If the `appUserID` has been generated by RevenueCat or not.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet.
   */
  public static async isAnonymous(): Promise<boolean> {
    await Purchases.throwIfNotConfigured();
    return RNPurchases.isAnonymous();
  }

  /**
   * iOS only. Computes whether or not a user is eligible for the introductory pricing period of a given product.
   * You should use this method to determine whether or not you show the user the normal product price or the
   * introductory price. This also applies to trials (trials are considered a type of introductory pricing).
   *
   * @note Subscription groups are automatically collected for determining eligibility. If RevenueCat can't
   * definitively compute the eligibility, most likely because of missing group information, it will return
   * `INTRO_ELIGIBILITY_STATUS_UNKNOWN`. The best course of action on unknown status is to display the non-intro
   * pricing, to not create a misleading situation. To avoid this, make sure you are testing with the latest version of
   * iOS so that the subscription group can be collected by the SDK. Android always returns INTRO_ELIGIBILITY_STATUS_UNKNOWN.
   *
   * @param productIdentifiers Array of product identifiers for which you want to compute eligibility
   * @returns { Promise<[productId: string]: IntroEligibility> } A map of IntroEligility per productId. The promise
   * will be rejected if configure has not been called yet or if there's in an error checking eligibility.
   */
  public static async checkTrialOrIntroductoryPriceEligibility(
    productIdentifiers: string[]
  ): Promise<{ [productId: string]: IntroEligibility }> {
    await Purchases.throwIfNotConfigured();
    return RNPurchases.checkTrialOrIntroductoryPriceEligibility(
      productIdentifiers
    );
  }

  /**
   * iOS only. Use this function to retrieve the `PurchasesPromotionalOffer` for a given `PurchasesPackage`.
   *
   * @param product The `PurchasesStoreProduct` the user intends to purchase.
   * @param discount The `PurchasesStoreProductDiscount` to apply to the product.
   * @returns { Promise<PurchasesPromotionalOffer> } Returns when the `PurchasesPaymentDiscount` is returned.
   * Null is returned for Android and incompatible iOS versions. The promise will be rejected if configure has not been
   * called yet or if there's an error getting the payment discount.
   */
  public static async getPromotionalOffer(
    product: PurchasesStoreProduct,
    discount: PurchasesStoreProductDiscount
  ): Promise<PurchasesPromotionalOffer | undefined> {
    await Purchases.throwIfNotConfigured();
    if (Platform.OS === "android") {
      return Promise.resolve(undefined);
    }
    if (typeof discount === "undefined" || discount == null) {
      throw new Error("A discount is required");
    }
    return RNPurchases.getPromotionalOffer(
      product.identifier,
      discount.identifier
    );
  }

  /**
   * Invalidates the cache for customer information.
   *
   * Most apps will not need to use this method; invalidating the cache can leave your app in an invalid state.
   * Refer to https://docs.revenuecat.com/docs/customer-info#section-get-user-information for more information on
   * using the cache properly.
   *
   * This is useful for cases where customer information might have been updated outside of the app, like if a
   * promotional subscription is granted through the RevenueCat dashboard.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or there's an error
   * invalidating the customer info cache.
   */
  public static async invalidateCustomerInfoCache(): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.invalidateCustomerInfoCache();
  }

  /** iOS only. Presents a code redemption sheet, useful for redeeming offer codes
   * Refer to https://docs.revenuecat.com/docs/ios-subscription-offers#offer-codes for more information on how
   * to configure and use offer codes
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or there's an error
   * presenting the code redemption sheet.
   */
  public static async presentCodeRedemptionSheet(): Promise<void> {
    if (Platform.OS === "ios") {
      await Purchases.throwIfNotConfigured();
      RNPurchases.presentCodeRedemptionSheet();
    }
  }

  /**
   * Subscriber attributes are useful for storing additional, structured information on a user.
   * Since attributes are writable using a public key they should not be used for
   * managing secure or sensitive information such as subscription status, coins, etc.
   *
   * Key names starting with "$" are reserved names used by RevenueCat. For a full list of key
   * restrictions refer to our guide: https://docs.revenuecat.com/docs/subscriber-attributes
   *
   * @param attributes Map of attributes by key. Set the value as an empty string to delete an attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or there's an error
   * setting the subscriber attributes.
   */
  public static async setAttributes(attributes: { [key: string]: string | null }): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setAttributes(attributes);
  }

  /**
   * Subscriber attribute associated with the email address for the user
   *
   * @param email Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the email.
   */
  public static async setEmail(email: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setEmail(email);
  }

  /**
   * Subscriber attribute associated with the phone number for the user
   *
   * @param phoneNumber Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the phone number.
   */
  public static async setPhoneNumber(phoneNumber: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setPhoneNumber(phoneNumber);
  }

  /**
   * Subscriber attribute associated with the display name for the user
   *
   * @param displayName Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the display name.
   */
  public static async setDisplayName(displayName: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setDisplayName(displayName);
  }

  /**
   * Subscriber attribute associated with the push token for the user
   *
   * @param pushToken null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the push token.
   */
  public static async setPushToken(pushToken: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured()
    RNPurchases.setPushToken(pushToken);
  }

  /**
   * Set this property to your proxy URL before configuring Purchases *only* if you've received a proxy key value
   * from your RevenueCat contact.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the proxy url.
   */
  public static async setProxyURL(url: string): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setProxyURLString(url);
  }

  /**
   * Automatically collect subscriber attributes associated with the device identifiers.
   * $idfa, $idfv, $ip on iOS
   * $gpsAdId, $androidId, $ip on Android
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting collecting the device identifiers.
   */
  public static async collectDeviceIdentifiers(): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.collectDeviceIdentifiers();
  }

  /**
   * Subscriber attribute associated with the Adjust Id for the user
   * Required for the RevenueCat Adjust integration
   *
   * @param adjustID Adjust ID to use in Adjust integration. Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting Adjust ID.
   */
  public static async setAdjustID(adjustID: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setAdjustID(adjustID);
  }

  /**
   * Subscriber attribute associated with the AppsFlyer Id for the user
   * Required for the RevenueCat AppsFlyer integration
   * @param appsflyerID Appsflyer ID to use in Appsflyer integration. Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the Appsflyer ID.
   */
  public static async setAppsflyerID(appsflyerID: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setAppsflyerID(appsflyerID);
  }

  /**
   * Subscriber attribute associated with the Facebook SDK Anonymous Id for the user
   * Recommended for the RevenueCat Facebook integration
   *
   * @param fbAnonymousID Facebook Anonymous ID to use in Mparticle integration. Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the Facebook Anonymous ID.
   */
  public static async setFBAnonymousID(fbAnonymousID: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setFBAnonymousID(fbAnonymousID);
  }

  /**
   * Subscriber attribute associated with the mParticle Id for the user
   * Recommended for the RevenueCat mParticle integration
   *
   * @param mparticleID Mparticle ID to use in Mparticle integration. Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the Mparticle ID.
   */
  public static async setMparticleID(mparticleID: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setMparticleID(mparticleID);
  }

  /**
   * Subscriber attribute associated with the CleverTap Id for the user
   * Required for the RevenueCat CleverTap integration
   *
   * @param cleverTapID CleverTap user ID to use in CleverTap integration. Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the CleverTap ID.
   */
  public static async setCleverTapID(cleverTapID: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setCleverTapID(cleverTapID);
  }

  /**
   * Subscriber attribute associated with the Mixpanel Distinct Id for the user
   * Required for the RevenueCat Mixpanel integration
   *
   * @param mixpanelDistinctID Mixpanel Distinct ID to use in Mixpanel integration. Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the Mixpanel Distinct ID.
   */
  public static async setMixpanelDistinctID(mixpanelDistinctID: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setMixpanelDistinctID(mixpanelDistinctID);
  }

  /**
   * Subscriber attribute associated with the Firebase App Instance ID for the user
   * Required for the RevenueCat Firebase integration
   *
   * @param firebaseAppInstanceID Firebase App Instance ID to use in Firebase integration. Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the Firebase App Instance ID.
   */
  public static async setFirebaseAppInstanceID(firebaseAppInstanceID: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setFirebaseAppInstanceID(firebaseAppInstanceID);
  }

  /**
   * Subscriber attribute associated with the OneSignal Player Id for the user
   * Required for the RevenueCat OneSignal integration
   *
   * @param onesignalID OneSignal Player ID to use in OneSignal integration. Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the OneSignal ID.
   */
  public static async setOnesignalID(onesignalID: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setOnesignalID(onesignalID);
  }

  /**
   * Subscriber attribute associated with the Airship Channel Id for the user
   * Required for the RevenueCat Airship integration
   *
   * @param airshipChannelID Airship Channel ID to use in Airship integration. Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the Airship Channel ID.
   */
  public static async setAirshipChannelID(airshipChannelID: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setAirshipChannelID(airshipChannelID);
  }

  /**
   * Subscriber attribute associated with the install media source for the user
   *
   * @param mediaSource Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the media source.
   */
  public static async setMediaSource(mediaSource: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setMediaSource(mediaSource);
  }

  /**
   * Subscriber attribute associated with the install campaign for the user
   *
   * @param campaign Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the campaign.
   */
  public static async setCampaign(campaign: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setCampaign(campaign);
  }

  /**
   * Subscriber attribute associated with the install ad group for the user
   *
   * @param adGroup Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting ad group.
   */
  public static async setAdGroup(adGroup: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setAdGroup(adGroup);
  }

  /**
   * Subscriber attribute associated with the install ad for the user
   *
   * @param ad Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the ad subscriber attribute.
   */
  public static async setAd(ad: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setAd(ad);
  }

  /**
   * Subscriber attribute associated with the install keyword for the user
   *
   * @param keyword Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the keyword.
   */
  public static async setKeyword(keyword: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setKeyword(keyword);
  }

  /**
   * Subscriber attribute associated with the install ad creative for the user
   *
   * @param creative Empty String or null will delete the subscriber attribute.
   * @returns {Promise<void>} The promise will be rejected if configure has not been called yet or if there's an error
   * setting the creative subscriber attribute.
   */
  public static async setCreative(creative: string | null): Promise<void> {
    await Purchases.throwIfNotConfigured();
    RNPurchases.setCreative(creative);
  }

  /**
   * Check if billing is supported for the current user (meaning IN-APP purchases are supported)
   * and optionally, whether a list of specified feature types are supported.
   *
   * Note: Billing features are only relevant to Google Play Android users.
   * For other stores and platforms, billing features won't be checked.
   *
   * @param features An array of feature types to check for support. Feature types must be one of
   *       [BILLING_FEATURE]. By default, is an empty list and no specific feature support will be checked.
   * @returns {Promise<boolean>} promise with boolean response. True if billing is supported, false otherwise.
   */
  public static canMakePayments(features: BILLING_FEATURE[] = []): Promise<boolean> {
    return RNPurchases.canMakePayments(features);
  }

  /**
   * iOS 15+ only. Presents a refund request sheet in the current window scene for
   * the latest transaction associated with the active entitlement.
   *
   * If the request was unsuccessful, no active entitlements could be found for
   * the user, or multiple active entitlements were found for the user,
   * the promise will return an error.
   * If called in an unsupported platform (Android or iOS < 15), an `UnsupportedPlatformException` will be thrown.
   *
   * Important: This method should only be used if your user can only have a single active entitlement at a given time.
   * If a user could have more than one entitlement at a time, use `beginRefundRequestForEntitlement` instead.
   *
   * @returns {Promise<REFUND_REQUEST_STATUS>} Returns REFUND_REQUEST_STATUS: The status of the
   *  refund request. Keep in mind the status could be REFUND_REQUEST_STATUS.USER_CANCELLED
   */
  public static async beginRefundRequestForActiveEntitlement(): Promise<REFUND_REQUEST_STATUS> {
    await Purchases.throwIfNotConfigured();
    await Purchases.throwIfAndroidPlatform();
    const refundRequestStatusInt = await RNPurchases.beginRefundRequestForActiveEntitlement();
    if (refundRequestStatusInt == null) {
      throw new UnsupportedPlatformError()
    }
    return Purchases.convertIntToRefundRequestStatus(refundRequestStatusInt);
  }

  /**
   * iOS 15+ only. Presents a refund request sheet in the current window scene for
   * the latest transaction associated with the `entitlement`.
   *
   * If the request was unsuccessful, the promise will return an error.
   * If called in an unsupported platform (Android or iOS < 15), an `UnsupportedPlatformException` will be thrown.
   *
   * @param entitlementInfo The entitlement to begin a refund request for.
   * @returns {Promise<REFUND_REQUEST_STATUS>} Returns REFUND_REQUEST_STATUS: The status of the
   *  refund request. Keep in mind the status could be REFUND_REQUEST_STATUS.USER_CANCELLED
   */
  public static async beginRefundRequestForEntitlement(entitlementInfo: PurchasesEntitlementInfo): Promise<REFUND_REQUEST_STATUS> {
    await Purchases.throwIfNotConfigured();
    await Purchases.throwIfAndroidPlatform();
    const refundRequestStatusInt = await RNPurchases.beginRefundRequestForEntitlementId(entitlementInfo.identifier);
    if (refundRequestStatusInt == null) {
      throw new UnsupportedPlatformError()
    }
    return Purchases.convertIntToRefundRequestStatus(refundRequestStatusInt);
  }

  /**
   * iOS 15+ only. Presents a refund request sheet in the current window scene for
   * the latest transaction associated with the `product`.
   *
   * If the request was unsuccessful, the promise will return an error.
   * If called in an unsupported platform (Android or iOS < 15), an `UnsupportedPlatformException` will be thrown.
   *
   * @param storeProduct The StoreProduct to begin a refund request for.
   * @returns {Promise<REFUND_REQUEST_STATUS>} Returns a REFUND_REQUEST_STATUS: The status of the
   *  refund request. Keep in mind the status could be REFUND_REQUEST_STATUS.USER_CANCELLED
   */
  public static async beginRefundRequestForProduct(storeProduct: PurchasesStoreProduct): Promise<REFUND_REQUEST_STATUS> {
    await Purchases.throwIfNotConfigured();
    await Purchases.throwIfAndroidPlatform();
    const refundRequestStatusInt = await RNPurchases.beginRefundRequestForProductId(storeProduct.identifier);
    if (refundRequestStatusInt == null) {
      throw new UnsupportedPlatformError()
    }
    return Purchases.convertIntToRefundRequestStatus(refundRequestStatusInt);
  }

  /**
   * Check if configure has finished and Purchases has been configured.
   *
   * @returns {Promise<Boolean>} promise with boolean response
   */
  public static isConfigured(): Promise<boolean> {
    return RNPurchases.isConfigured();
  }

  private static async throwIfNotConfigured() {
    const isConfigured = await Purchases.isConfigured();
    if (!isConfigured) {
      throw new UninitializedPurchasesError();
    }
  }

  private static async throwIfAndroidPlatform() {
    if (Platform.OS === "android") {
      throw new UnsupportedPlatformError()
    }
  }

  private static async throwIfIOSPlatform() {
    if (Platform.OS === "ios") {
      throw new UnsupportedPlatformError()
    }
  }

  private static convertIntToRefundRequestStatus(refundRequestStatusInt: number): REFUND_REQUEST_STATUS {
    switch (refundRequestStatusInt) {
      case 0:
        return REFUND_REQUEST_STATUS.SUCCESS;
      case 1:
        return REFUND_REQUEST_STATUS.USER_CANCELLED;
      default:
        return REFUND_REQUEST_STATUS.ERROR;
    }
  }
}