/**
 * @file RTCIceCandidate - ICE candidate representation.
 *
 * Implements the W3C RTCIceCandidate interface
 * (https://www.w3.org/TR/webrtc/#rtcicecandidate-interface).
 *
 * Represents an ICE (Interactive Connectivity Establishment) candidate that
 * describes a potential way to establish a connection with a peer.
 *
 * @license MIT
 * @author nmhung1210
 */
/**
 * Initialization dictionary for RTCIceCandidate.
 */
interface RTCIceCandidateInit {
    candidate?: string;
    sdpMid?: string | null;
    sdpMLineIndex?: number | null;
    usernameFragment?: string | null;
}
/**
 * Parsed attributes extracted from an ICE candidate string.
 */
interface ParsedCandidateAttributes {
    foundation: string | null;
    component: string | null;
    protocol: string | null;
    priority: number | null;
    address: string | null;
    port: number | null;
    type: string | null;
    tcpType: string | null;
    relatedAddress: string | null;
    relatedPort: number | null;
}
/**
 * JSON representation of an RTCIceCandidate.
 */
interface RTCIceCandidateJSON {
    candidate: string;
    sdpMid: string | null;
    sdpMLineIndex: number | null;
    usernameFragment?: string;
}
/**
 * RTCIceCandidate represents a potential method for establishing connectivity.
 *
 * ICE candidates are described using SDP (Session Description Protocol) syntax.
 * Each candidate describes a single address/port combination and transport protocol.
 */
declare class RTCIceCandidate {
    #private;
    /**
     * Creates a new RTCIceCandidate.
     *
     * @param {RTCIceCandidateInit} [candidateInit={}] - Initialization dictionary
     * @param {string} [candidateInit.candidate=''] - SDP candidate string
     * @param {string|null} [candidateInit.sdpMid] - Media stream ID
     * @param {number|null} [candidateInit.sdpMLineIndex] - M-line index
     * @param {string} [candidateInit.usernameFragment] - ICE username fragment
     * @throws {TypeError} If both sdpMid and sdpMLineIndex are null
     */
    constructor(candidateInit?: RTCIceCandidateInit);
    /**
     * SDP candidate attribute containing the candidate description.
     * @type {string}
     */
    get candidate(): string;
    /**
     * Media stream identification tag.
     * @type {string|null}
     */
    get sdpMid(): string | null;
    /**
     * Index of the m-line in the SDP this candidate is associated with.
     * @type {number|null}
     */
    get sdpMLineIndex(): number | null;
    /**
     * ICE username fragment.
     * @type {string|null}
     */
    get usernameFragment(): string | null;
    /**
     * Unique identifier for this candidate.
     * @type {string|null}
     */
    get foundation(): string | null;
    /**
     * Component identifier (rtp=1, rtcp=2).
     * @type {string|null}
     */
    get component(): string | null;
    /**
     * Priority value for this candidate.
     * Higher priority candidates are preferred.
     * @type {number|null}
     */
    get priority(): number | null;
    /**
     * IP address of this candidate.
     * @type {string|null}
     */
    get address(): string | null;
    /**
     * Transport protocol (udp/tcp).
     * @type {string|null}
     */
    get protocol(): string | null;
    /**
     * Port number.
     * @type {number|null}
     */
    get port(): number | null;
    /**
     * Type of candidate (host, srflx, prflx, relay).
     * @type {string|null}
     */
    get type(): string | null;
    /**
     * TCP candidate type (active, passive, so).
     * Only applicable for TCP candidates.
     * @type {string|null}
     */
    get tcpType(): string | null;
    /**
     * Related address for reflexive/relay candidates.
     * @type {string|null}
     */
    get relatedAddress(): string | null;
    /**
     * Related port for reflexive/relay candidates.
     * @type {number|null}
     */
    get relatedPort(): number | null;
    /**
     * Converts candidate to JSON representation.
     * @returns {Object} JSON representation
     */
    toJSON(): RTCIceCandidateJSON;
    /**
     * Creates an RTCIceCandidate from a candidate string.
     *
     * @param {string} candidateStr - ICE candidate string
     * @param {string|null} [sdpMid=null] - Media stream ID
     * @param {number|null} [sdpMLineIndex=0] - M-line index
     * @returns {RTCIceCandidate}
     */
    static fromString(candidateStr: string, sdpMid?: string | null, sdpMLineIndex?: number | null): RTCIceCandidate;
    /**
     * Validates if a string is a valid candidate format.
     *
     * @param {string} candidateStr - String to validate
     * @returns {boolean} True if valid candidate format
     */
    static isValid(candidateStr: string): boolean;
}
export default RTCIceCandidate;
export { RTCIceCandidate };
export type { RTCIceCandidateInit, ParsedCandidateAttributes, RTCIceCandidateJSON };