import { InvalidationPolicyCache } from '@nerdwallet/apollo-cache-policies';
import type { NormalizedCacheObject, ApolloClient } from '@apollo/client';
import type { InvalidationPolicyCacheConfig } from '@nerdwallet/apollo-cache-policies';
export interface InvalidationCacheConfig extends InvalidationPolicyCacheConfig {
    cacheIdentityKey?: string | Array<string>;
}
export type InitCacheOptions = {
    /** If true, cache read functions must return undefined,
     * so all request goes to network, but merge functions should work as normal, so cache is filled with incoming data */
    skipOnRead: boolean;
};
/** Initialize cache config based on client requirements, such as skipOnRead */
export type InitCacheConfig = (options: InitCacheOptions) => InvalidationCacheConfig;
type AddCacheOptions = {
    /** If true, all current apollo queries will be notified and refreshed if needed */
    broadcast?: boolean;
    /** If true, additional cache will be added on top of client's cache, otherwise - under the client's cache */
    overrideClient?: boolean;
};
/**
 * Basic Apollo cache with the following features:
 * 1. data invalidation, which can occur according to TTL (globally or per-list / per-type level).
 * 2. cache identity. The cache is bound to the user, so that when a cookie is changed,
 * the cache from the previous user is not loaded to the user from persisted sources such as localStorage
 * @example
 * const cache = new InvalidationCache({
 *     invalidationPolicies: {
 *         timeToLive: 15 * 60 * 1000, // 15 minutes in milliseconds,
 *         types: {
 *             Contact: {
 *                 timeToLive: 2 * 60 * 60 * 1000, // 2 hours in milliseconds,
 *             },
 *         },
 *     },
 *     cacheIdentityKey: ['ROOT_QUERY', 'authenticatedUser', 'id'],
 * })
 */
export declare class InvalidationCache extends InvalidationPolicyCache {
    readonly cacheIdentityKey: string | Array<string>;
    constructor(config?: InvalidationCacheConfig);
}
/**
 * Wrapper, which is used to create cache instance by this package logic,
 * since specific class / implementation can be changed later
 * @example
 * const cache = createApolloCache({
 *     invalidationPolicies: {
 *         timeToLive: 15 * 60 * 1000, // 15 minutes in milliseconds,
 *         types: {
 *             Contact: {
 *                 timeToLive: 2 * 60 * 60 * 1000, // 2 hours in milliseconds,
 *             },
 *         },
 *     },
 *     cacheIdentityKey: ['ROOT_QUERY', 'authenticatedUser', 'id'],
 * })
 */
export declare function createApolloCache(config?: InvalidationCacheConfig): InvalidationCache;
/**
 * Extracts cache data from apollo client,
 * when merges it together with incoming cache,
 * and loads it back into the client
 * @param client - apollo client to extract cache from
 * @param cache - cache, obtained from other source (usually from persistor)
 * @param options - merge parameters
 * @param options.broadcast - If true, all current apollo queries will be notified and refreshed if needed
 * @param options.overrideClient - If true, additional cache will be added on top of client's cache,
 * otherwise - under the client's cache
 */
export declare function addCacheToClient(client: ApolloClient<NormalizedCacheObject>, cache: NormalizedCacheObject, options: AddCacheOptions): void;
export {};