import * as React from "react";
export declare type CryptoCompareValues = {
    [key: string]: number;
};
export declare type CryptoCompareError = {
    Message: string;
};
export declare type CryptoCompareResponse = CryptoCompareValues | CryptoCompareError;
/**
 * @typedef {Object} Props
 * @property {string} apikey - the cryptocompare.com api key
 * @property {string} from - the origin cryptocurrency/currency symbol of interest
 * @property {string} to - the destination cryptocurrency/currency symbol of interest
 * @property {number} amount - the amount to be converted
 */
export declare type Props = {
    apikey?: string;
    from: string;
    to: string;
    amount: number;
};
/**
 * Set the API key for every future call
 * @param {string} apikey
 */
export declare const setApikey: (apikey: string) => string;
/**
 * Get the authorization header for the cryptocompare.com API
 * @param {string} apikey
 * @return {string}
 */
export declare const getApikeyAuthorizationHeader: (apikey: string) => string;
/**
 * Get the cryptocompare.com API URL
 * @param {string} from
 * @param {string} to
 * @return {string}
 */
export declare const getApiUrl: (from: string, to: string) => string;
/**
 * Get the currency amount to be printed
 * @param {number} conversionRate
 * @param {number} amount
 * @return {string}
 */
export declare const getAmount: (amount: number, conversionRate: number) => string;
export declare const emptyResult = "---";
export declare const defaultClassName = "react-crypto-compare";
export declare const errorClassName = "react-crypto-compare-error";
export declare const loadingClassName = "react-crypto-compare-loading";
export declare const amountClassName = "react-crypto-compare-amount";
export declare const currencyClassName = "react-crypto-compare-currency";
/**
 * @param props
 * @param props.apikey the cryptocompare.com api key
 * @param props.from The email of the user.
 * @param props.to The email of the user.
 * @param props.amount The email of the user.
 */
declare const CryptoCompare: React.FunctionComponent<Props>;
export default CryptoCompare;