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qvapay-dotnet

NuGet package with a QvaPay client for dotnet developers.

Configuring

Having a JSON configuration file like:

{
  [...]

  "QvaPayConfiguration": 
  {
    "AppId": "<APP_ID>",
    "AppSecret": "<APP_SECRET>"
  }

  [...]
}

You can add QvaPayClient to the DI just using

services.AddQvaPayClient();

You can change the root key in your config file like:

{
  [...]

  "QvaPay": // <--------------- this changed
  { 
    "AppId": "<APP_ID>",
    "AppSecret": "<APP_SECRET>"
  }

  [...]
}

Then you can do:

services.AddQvaPayClient((config) => {
    // This will search for "QvaPay:AppId" and "QvaPay:AppSecret" in the config
    config.AppConfigJsonPrefix = "QvaPay";   
});

Also you can manually set the info without a config file:

services.AddQvaPayClient((config) => {
    config.AppId = "<APP_ID>";
    config.AppSecret = "<APP_SECRET>";
});

aspnet core

Just add your app's configuration from QvaPay to the appsettings.json

In the Startup.cs use the AddQvaPayClient(...) method in the ConfigureServices section

[...]
using QvaPay.Sdk;

namespace MyWebApp
{
    public class Startup
    {
        public Startup(IConfiguration configuration) [...]

        public void ConfigureServices(IServiceCollection services)
        {
            [...]
            services.AddQvaPayClient();
            [...]
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env) [...]
    }
}

Define QvaPay callback handler

To define a handler for the request made from QvaPay when an invoice is processed, you need to follow two steps. First, you must implement and register in the DI an IQvaPayCallbackHander. Then you can use the shorthand:

[...]
using QvaPay.Sdk;
using QvaPay.Sdk.Callback;

namespace MyWebApp
{
    public class Startup
    {
        public Startup(IConfiguration configuration) [...]

        public void ConfigureServices(IServiceCollection services)
        {
            [...]
            services.AddQvaPayClient();

            // QvaPayCallbackHander.HandleCallback(invoiceId, remoteId) will be called on QvaPay callback request
            services.AddSingleton<IQvaPayCallbackHander, QvaPayCallbackHander>();
            [...]
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
          [...]
          app.UseEndpoints(endpoints =>
          {
              // The webhook defined in QvaPay website looks like: `https://YOURHOST:PORT/qvapay-callback`
              endpoints.MapQvaPayCallback("qvapay-callback");
              endpoints.MapControllers();
          });
          [...]
        }
    }
}

handler:

[...]
using QvaPay.Sdk.Callback;

namespace MyWebApp
{
    public class QvaPayCallbackHander : IQvaPayCallbackHander
    {
        public Task<QvaPayCallbackResponse> HandleCallback(Guid invoiceId, string remoteId = null)
        {
          // check info validity
          // if (!IsValid(invoiceId, remoteId))
          //     return Task.FromResult(new QvaPayCallbackResponse
          //     {
          //         StatusCode = HttpStatusCode.BadRequest,
          //         Message = "Invalid Info"
          //     });

          // process invoice
          [...]
          
          return Task.FromResult(new QvaPayCallbackResponse
          {
              StatusCode = HttpStatusCode.OK,
              Message = "Received"
          });
        }
    }
}

Using the client

After adding the client to your DI just pass IQvaPayClient in your constructor

using QvaPay.Sdk;

namespace MyWebApp
{
    public class QvaPayPaymentService 
    {
        private readonly IQvaPayClient _qvaPayClient;

        public QvaPayPaymentService(IQvaPayClient qvaPayClient) {
            _qvaPayClient = qvaPayClient;
        }

        public async Task<double> GetBalance() {
            var qvaPayResponse = await _qvaPayClient.GetBalance();

            // if (!qvaPayResponse.Success)
            //     throw new Exception(qvaPayResponse.Message)

            return qvaPayResponse.Data;
        }
    }
}

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QvaPay client for dotnet developers

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