/// <reference types="node" />
import { IncomingMessage } from 'http';
export declare const isEmpty: (value: unknown) => boolean;
export declare const cleanEmail: (email: string) => string;
export declare const isIdentifierType: (value: unknown) => boolean;
export declare class CustomerIORequestError extends Error {
    statusCode: number;
    response: IncomingMessage;
    body: string;
    static composeMessage(json: Record<string, any> | null): string;
    constructor(json: Record<string, any> | null, statusCode: number, response: IncomingMessage, body: string);
}
export declare class MissingParamError extends Error {
    constructor(param: string);
}