import "./ui/payment-popup";
/**
 * Called after login, fetches and caches the subscription data
 */
export declare function initSubscriptionCache(): Promise<void>;
/**
 * Called after logout
 */
export declare function clearSubscriptionCache(): void;
/**
 * Kicks off the puchase flow for a subscription or in-app purchase item.
 * @param purchaseId - identifies a subscription or an in-app purchase item (i.e. coins)
 * @returns - boolean indicating whether or not the purchase flow was successfully completed
 * @throws Error if player has an existing subscription
 */
export declare function purchase(purchaseId: string): Promise<boolean>;
/**
 * Cancel a user's existing subscription
 * @param productId - productId of desired subscription
 * @throws Error on player not having an existing subscription
 */
export declare function cancelSubscription(productId: string): Promise<void>;
export declare function getSubscription(): Promise<string | null>;
/**
 *
 * @param purchaseId - identifies a subscription
 * @returns - boolean indicating whether or not the user has purchased the subscription
 */
export declare function hasSubscription(purchaseId: string): boolean;