/**
 * Network connection detection utilities
 */
import type { NetworkInfo, ConnectionType, EffectiveConnectionType } from '@plyaz/types/api';
export declare function getNetworkInfo(headers?: HeadersInit | Record<string, string | string[]>): NetworkInfo;
/**
 * Get connection type
 *
 * @returns Connection type (wifi, cellular, etc.)
 */
export declare function getConnectionType(): ConnectionType;
/**
 * Get effective connection type (quality)
 *
 * @returns Effective type (4g, 3g, 2g, etc.)
 */
export declare function getEffectiveConnectionType(): EffectiveConnectionType;
/**
 * Check if on cellular connection
 *
 * @returns True if using cellular data
 */
export declare function isCellularConnection(): boolean;
/**
 * Check if on wifi connection
 *
 * @returns True if using wifi
 */
export declare function isWifiConnection(): boolean;
/**
 * Check if data saver is enabled
 *
 * @returns True if data saver mode is on
 */
export declare function isDataSaverEnabled(): boolean;
/**
 * Get network round-trip time (latency)
 *
 * @returns RTT in milliseconds or null
 */
export declare function getNetworkRTT(): number | null;
/**
 * Get network downlink speed
 *
 * @returns Speed in Mbps or null
 */
export declare function getNetworkSpeed(): number | null;
/**
 * Check if currently online
 *
 * @returns True if online
 */
export declare function isOnline(): boolean;
/**
 * Check if currently offline
 *
 * @returns True if offline
 */
export declare function isOffline(): boolean;
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