export declare class KVStorageModule {
    _storageDir: string;
    private constructor();
    private isAlphanumeric;
    private showError;
    static init({ dataDirName, storageName }: {
        dataDirName?: string;
        storageName: string;
    }): Promise<KVStorageModule>;
    put(key: string, value: string): Promise<unknown>;
    get(key: string): Promise<unknown>;
    delete(key: string): Promise<unknown>;
    has(key: string): Promise<unknown>;
    list(): Promise<unknown>;
    clear(): Promise<unknown>;
}