/**
 * Data provider interface
 */
import type { DataProvider, OHLCV, Timeframe } from "../types/index.js";
export { DataProvider };
/**
 * Base implementation with common utilities
 */
export declare abstract class BaseDataProvider implements DataProvider {
    abstract name: string;
    abstract fetchOHLCV(symbol: string, timeframe: Timeframe, limit: number, targetDate?: Date): Promise<OHLCV[]>;
    abstract isAvailable(): Promise<boolean>;
    /**
     * Validate OHLCV data integrity
     */
    protected validateData(data: OHLCV[]): boolean;
    /**
     * Sort data by timestamp (ascending)
     */
    protected sortData(data: OHLCV[]): OHLCV[];
}
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