import type { BackupAndSyncAnalyticsAction } from "../analytics/index.mjs";
import type { ProfileId } from "../authentication/index.mjs";
import type { BackupAndSyncContext } from "../types.mjs";
/**
 * Compares metadata between local and user storage, applying the most recent version.
 *
 * @param options - Configuration object for metadata comparison.
 * @param options.context - The backup and sync context containing controller and messenger.
 * @param options.localMetadata - The local metadata object.
 * @param options.localMetadata.value - The local metadata value.
 * @param options.localMetadata.lastUpdatedAt - The local metadata timestamp.
 * @param options.userStorageMetadata - The user storage metadata object.
 * @param options.userStorageMetadata.value - The user storage metadata value.
 * @param options.userStorageMetadata.lastUpdatedAt - The user storage metadata timestamp.
 * @param options.applyLocalUpdate - Function to apply the user storage value locally.
 * @param options.validateUserStorageValue - Function to validate user storage data.
 * @param options.analytics - Optional analytics configuration for tracking updates.
 * @param options.analytics.action - The analytics action for the event.
 * @param options.analytics.profileId - The profile ID for analytics.
 * @returns Promise resolving to true if local data should be pushed to user storage.
 */
export declare function compareAndSyncMetadata<T>({ context, localMetadata, userStorageMetadata, applyLocalUpdate, validateUserStorageValue, analytics, }: {
    context: BackupAndSyncContext;
    localMetadata?: {
        value?: T;
        lastUpdatedAt?: number;
    };
    userStorageMetadata?: {
        value?: T;
        lastUpdatedAt?: number;
    };
    applyLocalUpdate: (value: T) => Promise<void> | void;
    validateUserStorageValue: (value: T | undefined) => boolean;
    analytics?: {
        action: BackupAndSyncAnalyticsAction;
        profileId: ProfileId;
    };
}): Promise<boolean>;
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