export type WebSocketAddress = {
    host: string;
    port: number | null;
};
/**
 * Liberally parses a URL into its components and returns
 * null for a component if it is not present or invalid
 */
export declare function parseUrl(url: string): {
    protocol: string | null;
    hostname: string | null;
    port: number | null;
};
/**
 * Format web socket address into a string
 */
export declare function formatWebSocketAddress(address: WebSocketAddress | null): string | null;
/**
 * Format web socket address into a string
 */
export declare function formatFullWebSocketAddress(address: WebSocketAddress): string;
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