import { FgAPI } from './fg-api';
import { IFgApiInitializationOptions } from './interfaces/fg-api-initialization-options.interface';
/**
 * Initialize the FgAPI object.
 * @param {string} key Key
 * @param {string} secret Secret
 * @param {*} [opts] Extra settings
 * @param {string} [opts.environment] Environment (default: production). Values: production, development, rapidapi.
 * @param {*} [opts.requestDriver] Request driver (default: FetchRequestDriver)
 * @param {number} [opts.timeout] Timeout (default: 30)
 * @returns
 */
export declare function initialize(key: string, secret: string, opts?: Partial<IFgApiInitializationOptions>): Promise<FgAPI>;