/** Supported CoinGecko coin identifiers */
declare const SUPPORTED_COINS: readonly ["bitcoin", "ethereum", "solana", "usd-coin", "chainlink", "aave", "uniswap", "maker", "compound-governance-token"];
export type SupportedCoinId = (typeof SUPPORTED_COINS)[number];
/** Price data returned by the service */
export interface PriceData {
    coinId: string;
    price: number;
    currency: string;
    timestamp: number;
    source: 'coingecko';
}
/** Check if a coin ID is in the supported whitelist */
export declare function isSupportedCoin(coinId: string): coinId is SupportedCoinId;
/** Get a price with caching. Returns cached data if within TTL, otherwise fetches fresh.
 *  On fetch failure, returns stale cache if available (stale-on-error). */
export declare function getPrice(coinId: SupportedCoinId, currency?: string): Promise<PriceData>;
/** Bypass cache and fetch fresh data. Rate-limited to 1 per coin per 10 seconds. */
export declare function getFreshPrice(coinId: SupportedCoinId, currency?: string): Promise<PriceData>;
/** Clear all cached data (for tests) */
export declare function clearPriceCache(): void;
export {};
//# sourceMappingURL=price-feed.d.ts.map