import type { StoreAdapter } from "../core/otp.types.js";
export declare class MemoryAdapter implements StoreAdapter {
    private readonly storage;
    get(key: string): Promise<string | null>;
    set(key: string, value: string, ttlSeconds: number): Promise<void>;
    del(key: string): Promise<void>;
    increment(key: string, ttlSeconds: number): Promise<number>;
}