import { NamiActiveEntitlementsHandler, NamiEntitlement } from "../types/entitlements";
import { Callback } from "../types/components/containers";
/**
 * @class NamiEntitlementManager
 * Contains all methods and objects to work with entitlements in the SDK.
 */
export declare class NamiEntitlementManager {
    static instance: NamiEntitlementManager;
    private emitter;
    /**
     * @returns {NamiEntitlement[]} A list of currently active entitlements
     */
    static active(): NamiEntitlement[];
    /**
     * Checks if a Nami Control Center defined Entitlement has at least one backing purchase
     * and it's not expired.
     *
     * @param referenceId - entitlement referenceId
     * @returns {boolean} True if the entitlement is active for given referenceId, false otherwise.
     */
    static isEntitlementActive(referenceId: string): boolean;
    /**
     * Asks Nami to fetch the latest active entitlements
     *
     * @returns {Promise<NamiEntitlement[]>} A promise that resolves to a list of NamiEntitlement
     */
    static refresh(): Promise<NamiEntitlement[]>;
    /**
     * When there has been an update received to the active entitlements,
     * the Nami SDK will provide notification of that event through
     * this callback with list of active [NamiEntitlement]
     *
     * @param {NamiActiveEntitlementsHandler} handler - The callback function that will be invoked when the campaign list is updated.
     * @returns {Callback} A function that can be called to unregister the handler.
     */
    static registerActiveEntitlementsHandler(handler: NamiActiveEntitlementsHandler): Callback | undefined;
    /**
     *  Clear any provisional entitlement grants, which are entitlements issued on-device only.
     *  Useful for development and purchase testing. Not recommended to be called in production.
     */
    static clearProvisionalEntitlementGrants(): void;
    /**
     * Private Instance Methods
     */
    private get sdkInitialized();
}