import type { Session } from '../../types/session.js';
import type { ReplicaInfo, SyncStats, ReplicationConfig } from './types.js';
import type { Logger } from 'pino';
import { EventEmitter } from 'events';
export declare class SyncEngine extends EventEmitter {
    private readonly logger;
    private readonly conflictResolver;
    private readonly transport;
    constructor(logger: Logger);
    syncReplica(replica: ReplicaInfo, primarySessions: Session[], config: ReplicationConfig): Promise<SyncStats>;
    private processSyncBatch;
    private syncSession;
    private updateStats;
    syncAllReplicas(replicas: ReplicaInfo[], primarySessions: Session[], config: ReplicationConfig): Promise<Map<string, SyncStats>>;
}
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