/**
 * Converts currency amounts in a string using currency symbols.
 *
 * @param {string} inputString - String containing a currency amount to convert
 * @param {object} conversionRates - Object mapping currency symbols to conversion rates
 * @returns {string} Converted currency amount as a string, or the original string if conversion is not possible
 * @example convertCurrency("¥100", { "¥": 0.01 }); // "1"
 * @example convertCurrency("$50", { "$": 1.2 }); // "60"
 * @example convertCurrency("€200", { "€": 1.1 }); // "220"
 */
export declare const convertCurrency: <T extends {
    [key: string]: number | string;
}>(inputString: string, conversionRates?: T) => string;