/**
 * Client-side scan payload sanitize + retail GTIN pre-check.
 * Server BarcodeNormalizationService remains authoritative on assign/lookup.
 */
import type { BarcodeScannerFormatProfile } from '../hooks/scannerFormats.js';
/**
 * Trim + strip ASCII control chars (client pre-trim only).
 */
export declare function normalizeScanPayload(raw: string): string;
/**
 * Prepare a decode payload for emit. Returns null when retail GTIN check fails
 * (caller should continue scanning without onDecode).
 */
export declare function prepareScanPayloadForEmit(raw: string, formatProfile: BarcodeScannerFormatProfile): string | null;
/** @internal test export */
export declare function isGtinCheckDigitValidForTest(digits: string): boolean;
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