createOrder method

Future<bool> createOrder({ required num amountVal, num? coinsVal, String? coinPlanId, String? orderId, String? subject, String? appId, String? merchantNo, String? apiUrl, String? privateKeyBase64, String? frontCallbackUrl, String? notifyUrl, String? upiId, String currencyCode = "USD", String countryCode = "US", String userId = "USER_01", String paymentGatewayName = "PayerMax", bool testMode = false, bool openHostedCashierDirectly = true, dynamic onSuccess()?, dynamic onFailure()?, dynamic onToast()?, })

Setup and initialize order creation with PayerMax

Implementation

Future<bool> createOrder({
  required num amountVal,
  num? coinsVal,
  String? coinPlanId,
  String? orderId,
  String? subject,
  String? appId,
  String? merchantNo,
  String? apiUrl,
  String? privateKeyBase64,
  String? frontCallbackUrl,
  String? notifyUrl,
  String? upiId,
  String currencyCode = "USD",
  String countryCode = "US",
  String userId = "USER_01",
  String paymentGatewayName = "PayerMax",
  bool testMode = false,
  bool openHostedCashierDirectly = true,
  Function()? onSuccess,
  Function()? onFailure,
  Function()? onToast,
}) async {
  this.paymentGatewayName = paymentGatewayName;
  this.testMode = testMode;
  this.openHostedCashierDirectly = openHostedCashierDirectly;
  amount.value = amountVal.toDouble();
  coins.value = (coinsVal ?? amountVal).toInt();
  planId.value = coinPlanId ?? orderId ?? "";
  currency.value = currencyCode;
  onPaymentSuccess = onSuccess;
  onPaymentFailure = onFailure;
  onShowToast = onToast;
  statusRx.value = PayerMaxStatusModel.waiting();
  isLoading.value = true;

  try {
    final nowUtc = DateTime.now().toUtc();
    final requestTime = _formatRfc3339(nowUtc);

    final currentOutTradeNo =
        orderId ?? "ORDER_${nowUtc.millisecondsSinceEpoch}";
    outTradeNo.value = currentOutTradeNo;

    targetAppId = appId ?? PayerMaxConfig.defaultAppId;
    targetMerchantNo = merchantNo ?? PayerMaxConfig.defaultMerchantNo;
    targetApiUrl = apiUrl ??
        (testMode
            ? PayerMaxConfig.sandboxApiUrl
            : PayerMaxConfig.productionApiUrl);
    targetPrivateKey =
        privateKeyBase64 ?? PayerMaxConfig.defaultPrivateKeyBase64;
    frontCallback = frontCallbackUrl ?? "storybox://open";
    notifyUrlStr = notifyUrl;
    orderSubjectStr = subject ??
        (coinPlanId != null
            ? "Coin Recharge Plan $coinPlanId"
            : "Order $currentOutTradeNo");

    final requestBodyMap = {
      "version": "1.4",
      "keyVersion": "1",
      "requestTime": requestTime,
      "appId": targetAppId,
      "merchantNo": targetMerchantNo,
      "data": {
        "outTradeNo": currentOutTradeNo,
        "subject": orderSubjectStr,
        "totalAmount": amountVal.toStringAsFixed(2),
        "currency": currencyCode,
        "country": countryCode,
        "userId": userId,
        "frontCallbackUrl": frontCallback,
        if (notifyUrlStr != null && notifyUrlStr!.isNotEmpty)
          "notifyUrl": notifyUrlStr,
      }
    };

    final jsonBodyString = jsonEncode(requestBodyMap);

    // Sign with RSA Private Key
    final privateKey = _parsePkcs8PrivateKey(base64Decode(targetPrivateKey));
    final signature =
        _signSha256WithRsa(utf8.encode(jsonBodyString), privateKey);

    final response = await http.post(
      Uri.parse(targetApiUrl),
      headers: {
        "Content-Type": "application/json;charset=utf-8",
        "Accept": "application/json",
        "sign": signature,
      },
      body: jsonBodyString,
    );

    final resData = jsonDecode(response.body) as Map<String, dynamic>;
    final code = resData["code"] ?? "";
    final msg = resData["msg"] ?? "";

    rawResponseMsg.value = msg.isNotEmpty ? msg : code;

    if (code == "APPLY_SUCCESS" || code == "SUCCESS") {
      final data = resData["data"] ?? {};
      redirectUrl.value = data["redirectUrl"] ?? "";
      tradeNo.value = data["payerMaxTradeNo"] ?? currentOutTradeNo;
    } else {
      tradeNo.value = currentOutTradeNo;
    }

    final payeeUpi = upiId ?? "";
    upiUri.value =
        "upi://pay?pa=$payeeUpi&pn=PayerMax&am=${amountVal.toStringAsFixed(2)}&cu=$currencyCode&tr=$currentOutTradeNo";

    isLoading.value = false;
    return true;
  } catch (e) {
    isLoading.value = false;
    debugPrint("PayerMaxController Exception => $e");
    final failureResponse = IncodesPaymentResponse(
      "Connection Error: $e",
      false,
      outTradeNo.value,
    );
    _handleFailure(failureResponse);
    return false;
  }
}