import type { EventType } from '../core/event-adapter';
export declare function range(length: number): number[];
export declare function mergeBuffer(...buffers: ArrayBuffer[]): ArrayBuffer;
export declare function sleep(ms: number): Promise<unknown>;
export declare function iceParse(ice: string[], enableTCP?: boolean): RTCIceServer[];
export declare function iceStringify(ice: RTCIceServer[]): string[];
export declare function ping(url: string, multiplier?: number): Promise<unknown>;
/**
 * @description filter event from data channel
 */
export declare const dataChannelMsgSorter: (data: ArrayBuffer) => EventType;
export declare const decodeUTF8Buffer: (data: ArrayBuffer, startIndex?: number) => string;
export declare function imageResize(image: HTMLImageElement): string;
export declare const notNull: <T>(value: T | null) => value is T;
export declare const isGamepadButtonDown: (gp: GamepadButton) => boolean;
export declare function gamepadDiff(g1: Gamepad, g2: Gamepad): boolean;
export declare function flatten<T>(arr: (T | T[])[]): T[];