import { AbstractValidatableDocument } from '../../contracts/abstract-validatable-document.js';
import { ReasonCode } from '../../contracts/reason-code.js';
import { type DocumentMeta } from '../../contracts/validation-result.js';
/**
 * Validates Brazilian CPF (Cadastro de Pessoas Físicas) numbers.
 *
 * Applies Mod11 check-digit algorithm with two verification digits.
 */
export declare class CPFValidation extends AbstractValidatableDocument {
    protected documentName(): string;
    /**
     * Generates a valid CPF.
     *
     * @param formatted When true, returns the masked form (000.000.000-00).
     * @returns A number that always passes {@link validate}.
     */
    static generate(formatted?: boolean): string;
    /**
     * Mod-11 check digit over `digits` with descending weights starting at
     * `startWeight`. Remainder < 2 yields 0 (the CPF convention shared with doValidate).
     */
    private static checkDigit;
    protected doValidate(): ReasonCode | null;
    /** Fiscal region (group of states) inferred from the 9th digit. */
    protected extractMeta(normalized: string): DocumentMeta;
    /** Canonical CPF mask: 000.000.000-00. */
    protected mask(stripped: string): string;
}