import type { TrackEndpoints, WebsiteTrackBackendEvent } from "./index.js";
export type StorageProvider = {
    push(value: OfflineEvent<WebsiteTrackBackendEvent>): Promise<void> | void;
    pop(): Promise<OfflineEvent<WebsiteTrackBackendEvent> | null> | OfflineEvent<WebsiteTrackBackendEvent> | null | undefined;
};
export type OfflineEvent<T> = {
    timestamp: number;
    websiteId: string;
    endpoint: TrackEndpoints;
    data: T;
};
export type OfflineMode = {
    checkOnline: () => Promise<boolean> | boolean;
    storage?: StorageProvider;
};
export declare class MemoryStorageProvider implements StorageProvider {
    private readonly events;
    push(value: OfflineEvent<WebsiteTrackBackendEvent>): void;
    pop(): OfflineEvent<WebsiteTrackBackendEvent> | null;
}
//# sourceMappingURL=offline.d.ts.map