import { MutationQueue } from '../persistence/MutationQueue';
import { SSEClient } from '../transport/SSEClient';
import { CrossTabSyncChannel, MutationSyncHandler } from './CrossTabSync';
export declare class SyncEngine {
    private projectId;
    private mutationQueue;
    private sseClient;
    private crossTabChannel;
    constructor(projectId: string, mutationQueue: MutationQueue, sseClient: SSEClient);
    getCrossTabChannel(): CrossTabSyncChannel;
    broadcastLocalMutation(path: string, action: string, data?: any, metadata?: any): void;
    listenCrossTab(onMutation: MutationSyncHandler): () => void;
    syncOfflineMutations(): Promise<void>;
}