import { z } from "zod";
/**
 * Fetches European natural gas prices from multiple free sources.
 * Primary: Yahoo Finance TTF futures (no API key needed).
 * Fallback: Derives from GIE AGSI+ storage economics if available.
 */
export declare const euGasPriceSchema: z.ZodObject<{
    hub: z.ZodOptional<z.ZodEnum<{
        ttf: "ttf";
        nbp: "nbp";
    }>>;
    period: z.ZodOptional<z.ZodEnum<{
        spot: "spot";
        week: "week";
    }>>;
}, z.core.$strip>;
interface GasPricePoint {
    date: string;
    price: number;
    currency: string;
    unit: string;
}
interface EuGasPriceResult {
    hub: string;
    hub_name: string;
    currency: string;
    unit: string;
    latest: GasPricePoint;
    prices: GasPricePoint[];
    price_eur_mwh: number;
    stats: {
        min: number;
        max: number;
        mean: number;
    };
}
export declare function getEuGasPrice(params: z.infer<typeof euGasPriceSchema>): Promise<EuGasPriceResult>;
export {};