Step by Step Guide to Building a Hotmart API Integration in C#

Aug 15, 2024 • 6 minute read

Introduction

Hey there, fellow developer! Ready to dive into the world of Hotmart API integration? You're in for a treat. We'll be walking through the process of building a robust C# integration that'll have you tapping into Hotmart's powerful features in no time. Let's get cracking!

Prerequisites

Before we jump in, make sure you've got these essentials:

Visual Studio or your favorite C# IDE
.NET Core SDK (3.1 or later)
Hotmart API credentials (if you don't have these yet, hop over to the Hotmart developer portal and get 'em)

Setting up the project

First things first, let's get our project off the ground:

Fire up Visual Studio and create a new C# Console Application.
Time to beef up our project with some NuGet packages. Open the Package Manager Console and run:

Install-Package Newtonsoft.Json
Install-Package RestSharp

Authentication

Alright, now for the fun part - authentication! Hotmart uses OAuth 2.0, so let's implement that flow:

public class HotmartAuthenticator
{
    private const string TokenUrl = "https://api-sec-vlc.hotmart.com/security/oauth/token";

    public async Task<string> GetAccessTokenAsync(string clientId, string clientSecret)
    {
        var client = new RestClient(TokenUrl);
        var request = new RestRequest(Method.POST);
        
        request.AddParameter("grant_type", "client_credentials");
        request.AddParameter("client_id", clientId);
        request.AddParameter("client_secret", clientSecret);

        var response = await client.ExecuteAsync(request);
        var tokenResponse = JsonConvert.DeserializeObject<TokenResponse>(response.Content);

        return tokenResponse.AccessToken;
    }
}

Making API requests

Now that we're authenticated, let's create a base API client to handle our requests:

public class HotmartApiClient
{
    private const string BaseUrl = "https://developers.hotmart.com/payments/api/v1";
    private readonly string _accessToken;

    public HotmartApiClient(string accessToken)
    {
        _accessToken = accessToken;
    }

    public async Task<T> GetAsync<T>(string endpoint)
    {
        var client = new RestClient(BaseUrl);
        var request = new RestRequest(endpoint, Method.GET);
        request.AddHeader("Authorization", $"Bearer {_accessToken}");

        var response = await client.ExecuteAsync(request);
        return JsonConvert.DeserializeObject<T>(response.Content);
    }

    // Add similar methods for POST, PUT, DELETE as needed
}

Implementing key Hotmart API endpoints

Let's implement some crucial endpoints:

public class HotmartService
{
    private readonly HotmartApiClient _apiClient;

    public HotmartService(string accessToken)
    {
        _apiClient = new HotmartApiClient(accessToken);
    }

    public async Task<List<Product>> GetProductsAsync()
    {
        return await _apiClient.GetAsync<List<Product>>("/products");
    }

    public async Task<List<Sale>> GetSalesAsync()
    {
        return await _apiClient.GetAsync<List<Sale>>("/sales");
    }

    // Implement other endpoints (subscriptions, affiliates) similarly
}

Error handling and logging

Don't forget to wrap your API calls in try-catch blocks and log any issues:

try
{
    var products = await hotmartService.GetProductsAsync();
    // Process products
}
catch (Exception ex)
{
    Console.WriteLine($"Error fetching products: {ex.Message}");
    // Log the error
}

Testing the integration

Time to put our code through its paces:

[TestMethod]
public async Task TestGetProducts()
{
    var authenticator = new HotmartAuthenticator();
    var token = await authenticator.GetAccessTokenAsync("your_client_id", "your_client_secret");
    var service = new HotmartService(token);

    var products = await service.GetProductsAsync();
    Assert.IsNotNull(products);
    Assert.IsTrue(products.Count > 0);
}

Best practices and optimization

Remember to respect Hotmart's rate limits and implement caching where it makes sense. Your future self will thank you!

Conclusion

And there you have it! You've just built a solid foundation for your Hotmart API integration in C#. From here, you can expand on this base, add more endpoints, and tailor it to your specific needs. The sky's the limit!

Additional resources

Now go forth and create something awesome with your new Hotmart integration! Happy coding!