import type { IUnleashConfig } from '../../../types/index.js';
import type { IClientMetricsEnv } from '../client-metrics/client-metrics-store-v2-type.js';
import type { IUnleashStores } from '../../../types/index.js';
export type LastSeenInput = {
    featureName: string;
    environment: string;
};
export declare class LastSeenService {
    private lastSeenToggles;
    private logger;
    private lastSeenStore;
    constructor({ lastSeenStore }: Pick<IUnleashStores, 'lastSeenStore'>, config: IUnleashConfig);
    store(): Promise<number>;
    updateLastSeen(clientMetrics: IClientMetricsEnv[]): void;
    cleanLastSeen(): Promise<void>;
}
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