import { FormatOptions, IDocumentValidator, ValidationOptions, ValidationResult } from './types';
export declare class CNPJValidator implements IDocumentValidator {
    clean(input: string): string;
    format(input: string): string | null;
    validate(input: string): ValidationResult;
    weakValidate(input: string): ValidationResult;
    private weakValidateCleanedInput;
    private validateCleanedInput;
    private validateCheckDigits;
    charToReceitaValue(char: string): number;
}
export declare function validateCNPJ(input: string, options?: ValidationOptions): ValidationResult;
export declare function weakValidateCNPJ(input: string): ValidationResult;
export declare function formatCNPJ(input: string, options?: FormatOptions): string | null;
export declare function cleanCNPJ(input: string): string;