import { AbstractValidatableDocument } from '../../contracts/abstract-validatable-document.js';
import { ReasonCode } from '../../contracts/reason-code.js';
import { type DocumentMeta } from '../../contracts/validation-result.js';
/**
 * Validates payment card numbers via the Luhn algorithm (Mod-10, ISO/IEC 7812).
 *
 * Validation is integrity-only: it proves the number is well-formed and passes
 * the check digit — it does NOT prove the card exists, is active, or is issued.
 * The `meta.brand` is a best-effort BIN heuristic that can drift as issuers
 * change ranges; do not rely on it for authorization.
 */
export declare class CartaoValidation extends AbstractValidatableDocument {
    protected documentName(): string;
    protected doValidate(): ReasonCode | null;
    /** Standard Luhn (Mod-10): double every 2nd digit from the right, sum, % 10 == 0. */
    private static luhnValid;
    /** Best-effort card brand inferred from the BIN. */
    protected extractMeta(normalized: string): DocumentMeta;
}