import { CountryCode } from 'libphonenumber-js';
export declare function callAll(...fns: any[]): (...args: any[]) => void;
export declare function compose(...fns: any[]): (...args: any[]) => any;
export declare function downloadLink(src: string, fileName?: string): void;
export declare function formatOnlyLetters(val: string): string;
export declare function formatOnlyNumbers(val: string): string;
export declare function genPhoneNumberForDatabase({ phone_number, code, }: {
    phone_number: string;
    code: CountryCode;
}): Promise<false | string>;
export declare function getBrowser(): any;
export declare function getBytesFromBase64(str: string): number | null;
export declare function getReadableSizeFromBytes(bytes: number | string): string;
export declare function isArray(val: any): val is Array<any>;
export declare function isBoolean(val: any): val is boolean;
export declare function isBlob(blob: any): boolean;
export declare function isFile(file: any): boolean;
export declare function isFunction(val: any): val is Function;
export declare function isNumber(val: any): val is number;
export declare function isObject(val: any): val is object;
export declare function isString(val: any): val is string;
export declare function isUndefined(val: any): val is undefined;
declare type Formatter = (val: string) => string;
interface FormatOptions {
    format?: string;
    formatter?: Formatter;
    defaultFormat?: string;
    wrap?: Function;
}
export declare function parsePhone(val: string | FormatOptions): Formatter | string;
export declare function parseSSN(val: string | FormatOptions): Formatter | string;
export declare function getDisplayName(Component: any): any;
export declare function resolveExt(str: string): string;
export declare function resolveFilename(str: string, defaultName?: string): string;
export declare function validatePhoneNumber({ phone_number, code, }: {
    phone_number: string;
    code: CountryCode;
}): Promise<boolean>;
export {};