import type { Bar, Timeframe, Datafeed } from '../../api/types';
export interface StreamingCallbacks {
    onBarUpdate: (bar: Bar) => void;
    onNewBar: (bar: Bar) => void;
    onReconnect: () => void;
}
export declare class StreamingHandler {
    private unsubscribe;
    private currentBar;
    private intervalSeconds;
    private callbacks;
    private datafeed;
    private symbol;
    private timeframe;
    constructor(datafeed: Datafeed, symbol: string, timeframe: Timeframe, callbacks: StreamingCallbacks);
    /** Start streaming. Pass the last known bar to seed. */
    start(lastBar: Bar | null): void;
    /** Stop streaming */
    stop(): void;
    /** Restart with new symbol/timeframe */
    restart(symbol: string, timeframe: Timeframe, lastBar: Bar | null): void;
    private processTick;
}