I am integrating payment api, I'm using firebase cloud functions as my backend and react-native in frontend, so right now i have the following code:

In react-native side:

const PaymentScreen = () => {
  setLoading(true);
  const onPay = () => {
    const onPaymentCall = firebase.functions().httpsCallable('onPayment');
    onPaymentCall(productsData)
    .then(res => {
      setLoading(false);
      if (res?.data?.statusCode === 200) {
        const paymentReceivedData = {
          transactionId: res?.data?.transactionId,
          paymentDate: new Date().now(),
          totalPrice: res?.data?.totalPrice
        }
        navigator.navigate('ReceiptScreen', { paymentReceivedData });
      }
    })
  }
  return (
    <TouchableOpacity onPress={onPay}>PAY</TouchableOpacity>
  )
}

firebase function to handle payment:

export const onPayment = functions
    .runWith({ timeoutSeconds: 300 })
    .https.onCall(async (data: any, context: any) => {
      if (!context.auth) {
            throw new functions.https.HttpsError(
                'failed-precondition',
                'The function must be called while authenticated.'
            );
        }
      try {
        const paymentResult = await paymentThroughApi(data);
        await admin.firestore().collection('wallet').add({...paymentResult});
        const response = {
          statusCode: 200,
          totalPrice: paymentResult.totalPrice,
          transactionId: paymentResult.transactionId,
        }
        return response;
      } catch (error) {
        const response = {
          statusCode: 400,
          message: 'Payment unsuccessful',
          transactionId: null,
        }
        return response;
      }

So the question is, how can I handle long-time response/timeout error/network-loss etc in react-native side, like how should I make it more robust? especially handling long-time responses, timeout errors, payment failures etc? Which packages should I use? like NetInfo to check internet connectivity but what is the best way to make payment flow robust?

So can anyone guide me or suggest any code snippets to add on to my current code?

Thank you!