/**
 * Web3 Price Oracle Service - 100% Decentralized
 *
 * Uses on-chain Chainlink price feeds for truly decentralized pricing
 * No external APIs, no centralized services
 */
export interface PriceData {
    currency: string;
    price: number;
    lastUpdated: number;
    source: 'chainlink' | 'dex' | 'cache';
}
export interface PriceServiceConfig {
    rpcUrl?: string;
    cacheTTL?: number;
    autoUpdate?: boolean;
    updateInterval?: number;
    customPriceFeeds?: Record<string, string>;
}
/**
 * 100% Decentralized Price Service using Chainlink Oracles
 */
export declare class Web3PriceService {
    private cache;
    private config;
    private provider;
    private updateTimer;
    private static readonly STORAGE_KEY;
    private static readonly DEFAULT_CACHE_TTL;
    private static readonly DEFAULT_UPDATE_INTERVAL;
    /**
     * Chainlink Price Feeds on Moonbeam
     * https://docs.chain.link/data-feeds/price-feeds/addresses
     */
    private static readonly MOONBEAM_PRICE_FEEDS;
    constructor(config?: PriceServiceConfig);
    /**
     * Initialize Web3 provider
     */
    private initializeProvider;
    /**
     * Get price feed address for a currency
     */
    private getPriceFeedAddress;
    /**
     * Fetch price from Chainlink oracle (100% on-chain)
     */
    fetchPriceFromChainlink(currency: string): Promise<number>;
    /**
     * Fetch DOT price (the native token)
     */
    fetchDOTPrice(vsCurrency?: string): Promise<number>;
    /**
     * Update all cached prices from chain
     */
    updatePrices(): Promise<Map<string, PriceData>>;
    /**
     * Get price for a currency (from cache or fetch)
     */
    getPrice(currency: string): Promise<number | null>;
    /**
     * Get price data with metadata
     */
    getPriceData(currency: string): PriceData | null;
    /**
     * Convert fiat amount to DOT
     */
    convertFiatToDOT(amount: number, fiatCurrency: string): Promise<string>;
    /**
     * Convert DOT amount to fiat
     */
    convertDOTToFiat(dotAmount: string, fiatCurrency: string): Promise<number>;
    /**
     * Check if price is stale
     */
    isPriceStale(currency: string): boolean;
    /**
     * Check if prices are cached
     */
    hasCachedPrices(): boolean;
    /**
     * Get all cached prices
     */
    getAllPrices(): Map<string, PriceData>;
    /**
     * Get last update time
     */
    getLastUpdateTime(): number;
    /**
     * Clear price cache
     */
    clearCache(): void;
    /**
     * Start auto-updating prices
     */
    private startAutoUpdate;
    /**
     * Stop auto-updating prices
     */
    private stopAutoUpdate;
    /**
     * Load cache from localStorage
     */
    private loadCacheFromStorage;
    /**
     * Save cache to localStorage
     */
    private saveCacheToStorage;
    /**
     * Cleanup and destroy service
     */
    destroy(): void;
}
/**
 * Utility: Format DOT amount for display
 */
export declare function formatDOTAmount(amount: string, decimals?: number): string;
/**
 * Utility: Validate DOT amount
 */
export declare function validateDOTAmount(amount: string): boolean;
/**
 * Utility: Validate fiat amount
 */
export declare function validateFiatAmount(amount: number, currency: string): boolean;
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