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 CNS (Cartão Nacional de Saúde) numbers.
 */
export declare class CNSValidation extends AbstractValidatableDocument {
    protected documentName(): string;
    /**
     * Generates a valid CNS (provisional type, leading 7/8/9).
     *
     * Provisional cards only require the weighted sum (15..1) to be divisible by
     * 11, so we fix the first 14 digits at random and solve the last one; if no
     * single digit closes the sum, we resample. This avoids reproducing the
     * Ministry of Health's definitive-card (type 1/2) suffix rules.
     *
     * @param formatted When true, returns the masked form (000 0000 0000 0000).
     */
    static generate(formatted?: boolean): string;
    protected doValidate(): ReasonCode | null;
    /** CNS subtype from the leading digit: 1/2 definitive, 7/8/9 provisional. */
    protected extractMeta(normalized: string): DocumentMeta;
    /** Canonical CNS mask: 000 0000 0000 0000 (space-separated groups). */
    protected mask(stripped: string): string;
}