import { RequestInit, Response, Headers } from 'node-fetch';
import { IProxyContext, IProxySettings } from '../core/interfaces';
export declare type SPFetch = (url: string, init?: RequestInit) => Promise<Response>;
export declare type SPResponse = Response;
export interface FetchError {
    response: SPResponse;
    status: number;
    statusText: string;
    body?: string;
}
export interface FetchOptions extends RequestInit {
    headers?: Headers;
}
export declare class SPClient {
    private ctx;
    private settings;
    private agent;
    constructor(ctx: IProxyContext, settings: IProxySettings);
    fetch: (url: string, init?: FetchOptions) => Promise<Response>;
    requestDigest: (webUrl: string) => Promise<string>;
}