import type { ClientConfig, ClientConfigOrString } from './client.type.js';
export declare const DEFAULT_MAX_RESPONSE_FRAME_SIZE: number;
/**
 * The server evicts a connection silent for 36 s (1.2 x its 30 s heartbeat
 * interval). 5 s matches the other SDKs and survives several skipped pings.
 */
export declare const DEFAULT_HEARTBEAT_INTERVAL: number;
/** Node's largest timer delay: setInterval clamps anything above it to 1 ms. */
export declare const MAX_HEARTBEAT_INTERVAL = 2147483647;
export declare const normalizeClientConfig: (config: ClientConfigOrString) => ClientConfig;
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