export interface CdpSocket {
    addEventListener(event: string, listener: (event: {
        data: string;
    }) => void): void;
    removeEventListener(event: string, listener: (event: {
        data: string;
    }) => void): void;
    send(payload: string): void;
    close(): void;
}
export interface CdpMessage {
    id?: number;
    method?: string;
    params?: unknown;
    result?: unknown;
    error?: {
        message?: string;
        code?: number;
    };
    sessionId?: string;
}
export type CdpEventListener = (message: CdpMessage) => void;
export interface CdpConnectionOptions {
    endpoint: string;
    connectSocket?: (webSocketUrl: string) => Promise<CdpSocket>;
    timeoutMs?: number;
}
export declare class CdpConnection {
    private readonly options;
    private nextId;
    private socket?;
    private readonly pending;
    private readonly eventListeners;
    constructor(options: CdpConnectionOptions);
    connect(): Promise<void>;
    call<T = unknown>(method: string, params?: Record<string, unknown>, sessionId?: string): Promise<T>;
    close(): void;
    onEvent(listener: CdpEventListener): () => void;
    waitForEvent(predicate: (message: CdpMessage) => boolean, timeoutMs?: number): Promise<CdpMessage>;
    private readonly handleMessage;
}