interface InMemoryGetOptions {
    format?: 'string' | 'json';
}
interface InMemorySetOptions {
    ttlSeconds?: number;
}
export declare class InMemoryClient {
    private cache;
    private timers;
    constructor();
    get(key: string, options?: InMemoryGetOptions): Promise<string | Uint8Array | undefined>;
    get<T = any>(key: string, options: InMemoryGetOptions & {
        format: 'json';
    }): Promise<T | undefined>;
    set(key: string, value: any, options?: InMemorySetOptions): Promise<void>;
    delete(key: string): Promise<void>;
    private scheduleExpiration;
    private cleanup;
}
export {};
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