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Chargily ePay Gateway C# Package

This package supports the following frameowrks and platforms:

Framework	Support	Platform
Console	✅	Windows, Linux, macOS
ASP.NET Core	✅	Windows, Linux, macOS
Blazor WASM	✅	Windows, Linux, macOS
Blazor Server	✅	Windows, Linux, macOS
.NET MAUI	✅	Windows, Linux, macOS, Android, iOS, Tizen
Xamarin	✅	Android, iOS
ASP.NET	✅	Windows
WPF	✅	Windows
AvaloniaUI	✅	Windows, Linux, macOS
UWP	✅	Windows, Xbox OS
WinForms	✅	Windows

Any C# application that uses Microsoft.Extensions.DependencyInjection can use this package

Integrate ePayment gateway with Chargily easily.

• Currently support payment by CIB / EDAHABIA cards and soon by Visa / Mastercard
• This is a C#.NET Nuget Package, If you are using another programing language Browse here or look to API documentation

Installation

First, install the chargily.epay.csharp NuGet package into your app

Using DotNet CLI :

dotnet add chargily.epay.csharp

Using Visual Studio Dev Console:

Install-Package chargily.epay.csharp

Using Visual Studio IDE:

tutorial_adding_nuget_package.mp4

Requirements

1. Get your API Key/Secret from ePay by Chargily dashboard for free

How to use

Installation & Project Creation Video Guide

tutorial_create_console_project.mp4

Implemention of the code below:

tutorial_generic_project.mp4

Usage with any generic C# Project:

this package provide ChargilyEpayClient client, to create payment request use:

using Chargily.Epay;

var client = ChargilyEpay.CreateClient("[API_KEY]");

var payment = new EpayPaymentRequest()
{
    InvoiceNumber = "[INVOICE_NUMBER]",
    Name = "Ahmed",
    Email = "[email protected]",
    Amount = 1500,
    DiscountPercentage = 5.0,
    PaymentMethod = PaymentMethod.EDAHABIA,
    BackUrl = "https://yourapp.com/",
    WebhookUrl = "https://api.yourbackend.com/webhook-validator",
    ExtraInfo = "Product Purchase"
};

var response = await client.CreatePayment(payment);

Usage with ASP.NET Core

Video Guide how to use with Minimal API

tutorial_backend_aspnetcore_minimalapi.mp4

Video Guide how to use with ASP.NET Core WebAPI

Soon

this applies to:

• ASP.NET Core WebAPI
• ASP.NET Core Minimal WebAPI
• Blazor Server
• Blazor WASM
• ASP.NET Core MVC

using Chargily.Epay;
using Microsoft.AspNetCore.Mvc;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddChargilyEpayGateway("[API_KEY]");

var app = builder.Build();

app.MapPost("/invoice",
    async ([FromBody] EpayPaymentRequest request,
        [FromServices] IChargilyEpayClient<EpayPaymentResponse, EpayPaymentRequest> chargilyClient) =>
    {
        return await chargilyClient.CreatePayment(request);
    });

app.Run();

Request:

{
    "invoice_number" : "321616",
    "client" : "Ahmed",
    "client_email" : "[email protected]",
    "amount" : 1500,
    "discount" : 5.0,
    "mode" : "EDAHABIA",
    "back_url" : "https://example.com/",
    "webhook_url" : "https://shop.com/purchase",
    "comment" : "Product Purchase"
}

Response:

{
    "httpStatusCode": 201,
    "responseMessage": {
        "Message": "Success"
    },
    "isSuccessful": true,
    "isRequestValid": true,
    "body": {
        "checkout_url": "https://epay.chargily.com.dz/checkout/d00c1e652200798bbc35f688b2910fa9bc6c4c30d38b51e3f4142e407fa7c141"
    },
    "createdOn": "2022-05-06T03:55:49.6527862+01:00"
}

WebHook Validation:

using Chargily.Epay;
using Microsoft.AspNetCore.Mvc;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddChargilyWebHookValidator("[APP_SECRET]");

var app = builder.Build();
app.MapPost("/webhook_endpoint",
            ([FromServices] IWebHookValidator validator, HttpRequest request, [FromBody] ChargilyWebhookRequest body) =>
            {
                var signature = request.Headers["Signature"].First();
                var isValid   = validator.Validate(signature, request.Body);
                if (isValid) return Results.Ok(body.Invoice);
                return Results.Unauthorized();
            });

app.Run();

Configuration:

API_KEY & APP_SECRET can be added directly in code or from appsettings.json configuration file

builder.Services.AddChargilyWebHookValidator("[APP_SECRET]");
builder.Services.AddChargilyEpayGateway("[API_KEY]");

// OR

builder.Services.AddChargilyWebHookValidator(builder.Configuration["CHARGILY_APP_SECRET"]);
builder.Services.AddChargilyEpayGateway(builder.Configuration["CHARGILY_API_KEY"]);

// OR
// Same as previous but it will be loaded automatically from appsettings.json
builder.Services.AddChargilyWebHookValidator());
builder.Services.AddChargilyEpayGateway();

appsettings.json file:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*",
  "CHARGILY_APP_SECRET": "[APP_SECRET]", // <-- APP SECRET
  "CHARGILY_API_KEY": "[API_KEY]" // <-- API KEY
}

ASP.NET Core Middleware

This package provide WebHookValidatorMiddleware ASP.NET Core Middleware, when registered every POST request that have a Signature Http Header will be validated automatically. How to register the Middleware:

using Chargily.Epay;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddChargilyEpayGateway("[API_KEY]");

builder.Services
    .AddChargilyValidatorMiddleware("[APP_SECRET]"); // WebHookValidatorMiddleware have to be registered

var app = builder.Build();

app.UseChargilyValidatorMiddleware();

app.Run();

Usage with .NET MAUI

using Microsoft.Maui;
using Microsoft.Maui.Hosting;
using Microsoft.Maui.Controls.Compatibility;
using Microsoft.Maui.Controls.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Chargily.Epay;

namespace MyApp
{
  public static class MauiProgram
  {
    public static MauiApp CreateMauiApp()
    {
      var builder = MauiApp.CreateBuilder();
      builder.UseMauiApp<App>();
      builder.Services.AddChargilyEpayGateway("[API_KEY]");
      return builder.Build();
    }
  }
}

then you can add in ViewModels:

public class MainViewModel : ViewModelBase  
{  
    private ChargilyEpayClient _chargilyClient;  
    private IWebHookValidator _webhookValidator;

    public MainViewModel(ChargilyEpayClient chargilyClient)  
    {  
        _chargilyClient = chargilyClient;  
    }  
    // With Validator
    public MainViewModel(ChargilyEpayClient chargilyClient, IWebHookValidator webhookValidator)  
    {  
        _chargilyClient = chargilyClient;  
        _webhookValidator = webhookValidator;
    }  
}

Note when using .NET MAUI / Xamarin:

storing sensitive APP_SECRET in a frontend app is not a recommended approach, you'd be better off calling a backend api to handle payment, but it's doable. if you decide to use it in the frontend, consider storing APP_SECRET with Akavache BlobCache.Secure

This package is using Microsoft.Extensions.DependencyInjection dependancy injection, so it can be used with application or framework using it.