import type { IConfigCatCache } from "../ConfigCatCache.js";
type DBConnectionFactory = () => Promise<IIndexedDBDatabase>;
interface IIndexedDBDatabase {
    transaction(storeNames: string | string[], mode: "readonly" | "readwrite"): IIndexedDBTransaction;
    close(): void;
}
interface IIndexedDBTransaction {
    oncomplete: ((ev: any) => any) | null;
    onerror: ((ev: any) => any) | null;
    objectStore(name: string): IIndexedDBObjectStore;
}
interface IIndexedDBObjectStore {
    get(query: string): IIndexedDBRequest;
    put(value: any, key: string): IIndexedDBRequest;
}
interface IIndexedDBRequest<T = any> {
    readonly result: T;
    readonly error: Error | null;
    onsuccess: ((ev: any) => any) | null;
}
export declare class IndexedDBConfigCache implements IConfigCatCache {
    private readonly dbConnectionFactory;
    private static tryGetFactory;
    constructor(dbConnectionFactory: DBConnectionFactory);
    set(key: string, value: string): Promise<void>;
    get(key: string): Promise<string | undefined>;
}
export declare function getDBConnectionFactory(): DBConnectionFactory | undefined;
export {};