import type { BigSource, Big } from 'big.js';
export type Rates = Record<string, number>;
export interface Options {
    /**
     * Currency from which you want to convert.
    */
    from?: string;
    /**
     * Currency to which you want to convert.
    */
    to?: string;
    /**
     * Base currency.
    */
    base: string;
    /**
     * Object containing currency rates (for example from an API, such as Open Exchange Rates).
    */
    rates: Rates;
    /**
     * Optional, Big.js constructor - useful to avoid floating point errors.
    */
    BigJs?: new (value: BigSource) => Big;
}