import { AxiosInstance } from 'axios';
import { WyreAPIOptions } from './WyreAPIOptions';
export declare class WyreAxiosInstance {
    private options;
    private secretKey?;
    private axiosInstance;
    private constructor();
    static newInstance(options: WyreAPIOptions, secretKey?: string): WyreAxiosInstance;
    getAxiosInstance(): AxiosInstance;
    private initialize;
    setSecretKey(secretKey: string): void;
}