How to use the react-native-square-reader-sdk.startCheckoutAsync function in react-native-square-reader-sdk

// Optional for all following configuration
      skipReceipt: false,
      collectSignature: true,
      allowSplitTender: false,
      delayCapture: false,
      note: 'Hello 💳 💰 World!',
      tipSettings: {
        showCustomTipField: true,
        showSeparateTipScreen: false,
        tipPercentages: [15, 20, 30],
      },
      additionalPaymentTypes: ['cash', 'manual_card_entry', 'other'],
    };

    try {
      const checkoutResult = await startCheckoutAsync(checkoutParams);
      // Consume checkout result from here
      const currencyFormatter = this.props.globalize.getCurrencyFormatter(
        checkoutResult.totalMoney.currencyCode,
        { minimumFractionDigits: 0, maximumFractionDigits: 2 },
      );
      const formattedCurrency = currencyFormatter(checkoutResult.totalMoney.amount / 100);
      Alert.alert(`${formattedCurrency} Successfully Charged`, 'See the debugger console for transaction details. You can refund transactions from your Square Dashboard.');
      console.log(JSON.stringify(checkoutResult));
    } catch (ex) {
      let errorMessage = ex.message;
      switch (ex.code) {
        case CheckoutErrorCanceled:
          // Handle canceled transaction here
          console.log('transaction canceled.');
          break;
        case CheckoutErrorSdkNotAuthorized: