public string GetExpressCheckoutDetails(string token, string payerId)
{
string paypalEmail = string.Empty, shippingAddress = string.Empty, errorMessage = string.Empty;
NVPCodec encoder = new NVPCodec();
encoder["METHOD"] = "GetExpressCheckoutDetails";
encoder["TOKEN"] = token;
string nvpRequest = encoder.ConvertToNvpString();
string nvpResponse = HttpNvpRequestHandler(nvpRequest);
NVPCodec decoder = new NVPCodec();
decoder.ConvertToNameValueCollection(nvpResponse);
string acknowledgementStatus = decoder["ACK"].ToLower();
if (!string.IsNullOrWhiteSpace(acknowledgementStatus) && (acknowledgementStatus == "success" || acknowledgementStatus == "successwithwarning"))
{
paypalEmail = decoder["email"];
//shippingAddress = $"CustomerName: {decoder["PAYMENTREQUEST_0_SHIPTONAME"]} AddressLine: {decoder["PAYMENTREQUEST_0_SHIPTOSTREET"]} AddressLine2: {decoder["PAYMENTREQUEST_0_SHIPTOSTREET2"]} City: {decoder["PAYMENTREQUEST_0_SHIPTOCITY"]} State: {decoder["PAYMENTREQUEST_0_SHIPTOSTATE"]} Zipcode: {decoder["PAYMENTREQUEST_0_SHIPTOZIP"]}";
}
return(paypalEmail);
}
protected override async Task <IPaymentRedirectResponse> PaymentRedirectChargeGenerator(ICharge charge)
{
try
{
NVPCodec encoder = new NVPCodec();
encoder["METHOD"] = "SetExpressCheckout";
encoder["RETURNURL"] = _settings.GetConfigSetting <string>(SettingKeys.PaymentGateway.Paypal.ReturnUrl);
encoder["CANCELURL"] = _settings.GetConfigSetting <string>(SettingKeys.PaymentGateway.Paypal.CancelUrl);
encoder["PAYMENTREQUEST_0_AMT"] = charge.Amount.ToString();
encoder["PAYMENTREQUEST_0_PAYMENTACTION"] = "Sale";
encoder["PAYMENTREQUEST_0_CURRENCYCODE"] = "USD";
string nvpRequest = encoder.ConvertToNvpString();
string nvpResponse = HttpNvpRequestHandler(nvpRequest);
NVPCodec decoder = new NVPCodec();
decoder.ConvertToNameValueCollection(nvpResponse);
string acknowledgementStatus = decoder["ACK"].ToLower();
if (acknowledgementStatus != null && (acknowledgementStatus == "success" || acknowledgementStatus == "successwithwarning"))
{
string expressCheckoutUrl = "https://" + _settings.GetConfigSetting <string>(SettingKeys.PaymentGateway.Paypal.HostUrl) + "/cgi-bin/webscr?cmd=_express-checkout" + "&token=" + decoder["TOKEN"];
return(GetPaymentRedirectResponse(expressCheckoutUrl));
}
else
{
return(GetPaymentRedirectResponse(null, decoder["L_SHORTMESSAGE0"].ToString()));
}
}
catch (Exception ex)
{
_logger.Log(LogCategory.Error, new Exception("Failed to create redirect charge", ex));
return(GetPaymentRedirectResponse(null, ex.Message));
}
}
private string SetApiCredentials()
{
NVPCodec codec = new NVPCodec();
if (!string.IsNullOrWhiteSpace(_settings.GetConfigSetting <string>(SettingKeys.PaymentGateway.Paypal.ApiUsername)))
{
codec["USER"] = _settings.GetConfigSetting <string>(SettingKeys.PaymentGateway.Paypal.ApiUsername);
}
if (!string.IsNullOrWhiteSpace(_settings.GetConfigSetting <string>(SettingKeys.PaymentGateway.Paypal.ApiPassword)))
{
codec[Pwd] = _settings.GetConfigSetting <string>(SettingKeys.PaymentGateway.Paypal.ApiPassword);
}
if (!string.IsNullOrWhiteSpace(_settings.GetConfigSetting <string>(SettingKeys.PaymentGateway.Paypal.ApiSignature)))
{
codec[Signature] = _settings.GetConfigSetting <string>(SettingKeys.PaymentGateway.Paypal.ApiSignature);
}
if (!string.IsNullOrWhiteSpace(Subject))
{
codec["SUBJECT"] = Subject;
}
codec["VERSION"] = "65.0";
return(codec.ConvertToNvpString());
}
public IPaymentResponse PaypalResponseHandler(IGatewayCharge gatewayCharge)
{
NameValueCollection nvcResponseQueryString = HttpUtility.ParseQueryString(gatewayCharge.QueryString);
var token = nvcResponseQueryString["TOKEN"];
var payerId = nvcResponseQueryString["PAYERID"];
try
{
if (token != null && payerId != null)
{
NVPCodec encoder = new NVPCodec();
NVPCodec decoder = new NVPCodec();
encoder["METHOD"] = "DoExpressCheckoutPayment";
encoder["TOKEN"] = token;
encoder["PAYMENTREQUEST_0_PAYMENTACTION"] = "Sale";
encoder["PAYERID"] = payerId;
encoder["PAYMENTREQUEST_0_AMT"] = gatewayCharge.Amount.ToString();
encoder["PAYMENTREQUEST_0_CURRENCYCODE"] = "USD";
string nvpRequest = encoder.ConvertToNvpString();
string nvpResponse = HttpNvpRequestHandler(nvpRequest);
decoder.ConvertToNameValueCollection(nvpResponse);
string acknowledgementStatus = decoder["ACK"].ToLower();
if (acknowledgementStatus != null && (acknowledgementStatus == "success" || acknowledgementStatus == "successwithwarning"))
{
string paypalEmail = GetExpressCheckoutDetails(token, payerId);
var paymentConfirmationNumber = string.Empty;
if (decoder["PAYMENTINFO_0_TRANSACTIONID"] != null)
{
paymentConfirmationNumber = decoder["PAYMENTINFO_0_TRANSACTIONID"].ToLower();
}
if (!string.IsNullOrWhiteSpace(paymentConfirmationNumber))
{
if (!string.IsNullOrWhiteSpace(paypalEmail))
{
paymentConfirmationNumber = paypalEmail + "~" + paymentConfirmationNumber;
}
}
else
{
paymentConfirmationNumber = paypalEmail;
}
return(GetPaymentResponse(true, PaymentGatewayError.None));
}
else
{
return(GetPaymentResponse(false, GetPaymentGatewayErrorCode(decoder["L_ERRORCODE0"].ToString())));
}
}
else
{
return(token != null?GetPaymentResponse(false, PaymentGatewayError.InvalidToken) : GetPaymentResponse(false, PaymentGatewayError.InvalidPayerId));
}
}
catch (Exception ex)
{
_logger.Log(LogCategory.Error, new Exception("Failed to handle response", ex));
return(GetPaymentResponse(false, GetPaymentGatewayErrorCode(ex.Message)));
}
}
