/**
 * RoPods Rate Fetcher Service
 * Fetches latest exchange rates from multiple sources
 */
export interface RateSource {
    name: string;
    url: string;
    apiKey?: string;
}
export interface ExchangeRates {
    base: string;
    rates: Record<string, number>;
    lastUpdated: string;
    source: string;
}
export declare class RoPodsRateFetcher {
    private static instance;
    private cache;
    private cacheTimeout;
    private readonly sources;
    static getInstance(): RoPodsRateFetcher;
    /**
     * Get latest exchange rates for RoPods
     * @param base Base currency (default: USD)
     * @param currencies Array of currencies to fetch
     * @returns Promise<ExchangeRates>
     */
    getLatestRates(base?: string, currencies?: string[]): Promise<ExchangeRates>;
    /**
     * Get RoPods specific currency rates (INR, USD focus)
     */
    getRoPodsRates(): Promise<ExchangeRates>;
    private fetchFromSources;
    private fetchFromSource;
    private filterRates;
    private isCacheValid;
    private getFallbackRates;
    /**
     * Clear cache to force fresh fetch
     */
    clearCache(): void;
    /**
     * Get cache status
     */
    getCacheInfo(): Array<{
        key: string;
        lastUpdated: string;
        source: string;
    }>;
}
export declare const ropodsRateFetcher: RoPodsRateFetcher;
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