Se agregó un parametro opcional para validar algo leido por el QR

import { BarCodeScannerResult } from "expo-barcode-scanner";

import { router } from "expo-router";

export const useQRScanner = () => {

interface QRScannerHookProps {

  validator?: (data: string) => boolean;

}

export const useQRScanner = ({ validator }: QRScannerHookProps) => {

  const [status, requestPermission] = Camera.useCameraPermissions();

  const [hasPermission, setHasPermission] = useState<boolean>(false);

  const [qrData, setQRData] = useState<string | null>(null);

  };

  const onQRScanned = (data: BarCodeScannerResult) => {

    console.log(data.data);

    if (validator && !validator(data.data)) {

      return;

    }

    setQRData(data.data);

    setScanning(false);

    router.back();