import { AssignmentCache, AssignmentCacheEntry } from '@eppo/js-client-sdk-common';
/** An {@link AssignmentCache} that can write (set) multiple entries at once (in bulk). */
export declare type BulkWriteAssignmentCache = AssignmentCache & {
    /** Sets all entries in the cache to the provided array of [key, value] pairs. */
    setEntries(entries: [string, string][]): void;
};
/** An {@link AssignmentCache} that can read (get) all entries at once. */
export declare type BulkReadAssignmentCache = AssignmentCache & {
    /** Returns all entries in the cache as an array of [key, value] pairs. */
    getEntries(): Promise<[string, string][]>;
};
/**
 * An {@link AssignmentCache} implementation that, upon `init`, reads from a persistent and async {@link BulkReadAssignmentCache}
 * and writes to a synchronous {@link BulkWriteAssignmentCache} for serving the cache.
 * */
export default class HybridAssignmentCache implements AssignmentCache {
    private readonly servingStore;
    private readonly persistentStore;
    constructor(servingStore: BulkWriteAssignmentCache, persistentStore: BulkReadAssignmentCache);
    init(): Promise<void>;
    set(key: AssignmentCacheEntry): void;
    has(key: AssignmentCacheEntry): boolean;
}
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