import { IAsyncStorage } from './storage';
/**
 * The `CoinGeckoAPI` class provides methods to get coin prices.
 */
export declare class CoinGeckoAPI {
    private static cache;
    private static activeRequests;
    static isCacheInitialized(): boolean;
    static initializeCache(storage: IAsyncStorage): void;
    /**
     * Gets the price of a token from CoinGecko.
     *
     * @param _coinId The coingecko ID for the token to get the price for.
     * @param expiryDuration The duration in milliseconds for which the price should be cached.
     *
     * @returns A Promise that resolves to the price of the token, or -1 if the price cannot be fetched.
     */
    static getCoinPrice(_coinId: string | undefined, expiryDuration?: number): Promise<number>;
}