import type { EdgeNodeTunnelManager } from './interfaces/EdgeNodeTunnelManager';
interface FrpTunnelManagerOptions {
    serverHost?: string | null;
    serverPort?: number | string | null;
    protocol?: string | null;
    token?: string | null;
}
export declare class FrpTunnelManager implements EdgeNodeTunnelManager {
    private readonly logger;
    private readonly enabled;
    private readonly serverHost?;
    private readonly serverPort?;
    private readonly protocol;
    private readonly token?;
    private readonly remotePortBase;
    private readonly remotePortStep;
    constructor(options: FrpTunnelManagerOptions);
    ensureConnectivity(nodeId: string, metadata: Record<string, unknown>): Promise<Record<string, unknown> | undefined>;
    private prepareTunnel;
    private resolveRemotePort;
    private resolveEntrypoint;
    private buildConfig;
    private extractRecord;
    private extractTunnel;
    private isRedirectHealthy;
    private normalizeString;
    private normalizeNumber;
    private hashString;
}
export {};