export declare type DataSource = ReturnType<typeof buildDataSource>;
export declare type Bar = {
    epoch: number;
    open: number;
    high: number;
    low: number;
    close: number;
    volume: number;
};
export declare function buildDataSource(): {
    getRevision(): number;
    getBarCount(): number;
    getData(): Bar[];
    yMinMax: ({ origin, zoom, width }: {
        origin: number;
        zoom: number;
        width: number;
    }) => [number, number];
    setData(value: Bar[]): void;
};