import UAParser from 'ua-parser-js';
export declare function randomToken(prefix: string): string;
export declare function checkToken(token: string, prefix: string): boolean;
export declare function integrity(plain: string): string;
export declare function checkIntegrity(plain: string, expectedIntegrity: string): boolean;
export declare function sha512(plain: string): string;
export declare function getUAInfo(userAgent?: string): UAParser.UAParserInstance | null;
export declare function getBrowserTypeForWebauthn(userAgent?: string): string | null | undefined;