import { BigNumber as BigNumberJs } from 'bignumber.js';
import BaseExchangeApi from './BaseExchangeApi';
import HttpWrapper from '../common/HttpWrapper';
export declare type CoinGeckoResponse = Record<string, Record<string, string>>;
export declare const COINGECKO_RBTC_ID = "rootstock";
export declare const COINGECKO_RIF_TOKEN_ID = "rif-token";
export default class CoinGecko extends BaseExchangeApi {
    readonly _httpWrapper: HttpWrapper;
    private readonly _baseUrl;
    private readonly _priceApiPath;
    private _url;
    constructor(_httpWrapper?: HttpWrapper, _baseUrl?: string, _priceApiPath?: string);
    queryExchangeRate(sourceCurrency: string, targetCurrency: string): Promise<BigNumberJs>;
}