export declare class CNPJ {
    private static readonly tamanhoCNPJSemDV;
    private static readonly regexCNPJSemDV;
    private static readonly regexCNPJ;
    private static readonly regexCaracteresMascara;
    private static readonly regexCaracteresNaoPermitidos;
    private static readonly valorBase;
    private static readonly pesosDV;
    private static readonly cnpjZerado;
    static isValid(cnpj: string): boolean;
    static calculaDV(cnpj: string): string;
    private static removeMascaraCNPJ;
}