/// <reference types="node" />
import { IncomingMessage } from "http";
export declare class BrowserFingerprint {
    options: {
        cookieKey?: string;
        toSetCookie?: boolean;
        onlyStaticElements?: boolean;
        settings?: {
            [key: string]: any;
        };
    };
    savedHashedHostName: string;
    savedHashedPid: number | string;
    constructor(options?: {});
    /**
     * The goal is to come up with as many *potentially* unique traits for the connection and add them to the elementsHash.
     * The collection of all the elementsHash keys will *hopefully* be unique enough for fingerprinting
     * Then, we save this hash in a cookie for later retrieval
     */
    fingerprint(req: IncomingMessage): {
        fingerprint: string;
        headersHash: Record<string, string>;
        elementsHash: Record<string, string | number>;
    };
    hashedHostName(): string;
    hashedPid(): string | number;
    parseCookies(req: IncomingMessage): Record<string, string>;
    calculateHashFromElements(elementsHash: Record<string, string | number>): string;
    sortAndStringObject(o: {
        [key: string]: any;
    }): {
        [key: string]: any;
    };
}