C#

dotnet add package DodoPayments.Client

using System;
using DodoPayments.Client;
using DodoPayments.Client.Models.CheckoutSessions;

// Configured using the DODO_PAYMENTS_API_KEY and DODO_PAYMENTS_BASE_URL environment variables
DodoPaymentsClient client = new();

CheckoutSessionCreateParams parameters = new()
{
    ProductCart =
    [
        new()
        {
            ProductID = "product_id",
            Quantity = 1,
        },
    ],
};

var checkoutSessionResponse = await client.CheckoutSessions.Create(parameters);

Console.WriteLine(checkoutSessionResponse.SessionId);

// Automatically reads from environment variables
DodoPaymentsClient client = new();

DodoPaymentsClient client = new() { BearerToken = "My Bearer Token" };

var parameters = new CheckoutSessionCreateParams
{
    ProductCart =
    [
        new()
        {
            ProductID = "prod_123",
            Quantity = 1
        }
    ],
    ReturnUrl = "https://yourdomain.com/return"
};

var session = await client.CheckoutSessions.Create(parameters);
Console.WriteLine($"Checkout URL: {session.Url}");

// Create a customer
var createParams = new CustomerCreateParams
{
    Email = "[email protected]",
    Name = "John Doe",
    Metadata = new Dictionary<string, string>
    {
        { "user_id", "12345" }
    }
};

var customer = await client.Customers.Create(createParams);

// Retrieve customer
var retrieved = await client.Customers.Retrieve("cus_123");
Console.WriteLine($"Customer: {retrieved.Name} ({retrieved.Email})");

// Create a subscription
var subscriptionParams = new SubscriptionCreateParams
{
    CustomerID = "cus_123",
    ProductID = "prod_456",
    PriceID = "price_789"
};

var subscription = await client.Subscriptions.Create(subscriptionParams);

// Cancel subscription
await client.Subscriptions.Cancel(subscription.Id);

using Microsoft.AspNetCore.Mvc;
using DodoPayments.Client;
using DodoPayments.Client.Models.CheckoutSessions;

[ApiController]
[Route("api/[controller]")]
public class PaymentsController : ControllerBase
{
    private readonly DodoPaymentsClient _client;
    private readonly ILogger<PaymentsController> _logger;

    public PaymentsController(DodoPaymentsClient client, ILogger<PaymentsController> logger)
    {
        _client = client;
        _logger = logger;
    }

    [HttpPost("checkout")]
    public async Task<IActionResult> CreateCheckout([FromBody] CheckoutRequest request)
    {
        try
        {
            var parameters = new CheckoutSessionCreateParams
            {
                ProductCart = request.Items,
                ReturnUrl = Url.Action("Return", "Checkout", null, Request.Scheme)
            };

            var session = await _client.CheckoutSessions.Create(parameters);

            return Ok(new { checkoutUrl = session.Url });
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Failed to create checkout");
            return BadRequest(new { error = ex.Message });
        }
    }
}

public record CheckoutRequest(List<ProductCartItem> Items);

public interface IPaymentService
{
    Task<CheckoutSessionResponse> CreateCheckoutAsync(List<ProductCartItem> items);
    Task<PaymentResponse> ProcessPaymentAsync(decimal amount, string currency, string customerId);
}

public class PaymentService : IPaymentService
{
    private readonly DodoPaymentsClient _client;
    private readonly ILogger<PaymentService> _logger;

    public PaymentService(DodoPaymentsClient client, ILogger<PaymentService> logger)
    {
        _client = client;
        _logger = logger;
    }

    public async Task<CheckoutSessionResponse> CreateCheckoutAsync(List<ProductCartItem> items)
    {
        var parameters = new CheckoutSessionCreateParams
        {
            ProductCart = items,
            ReturnUrl = "https://yourdomain.com/return"
        };

        return await _client.CheckoutSessions.Create(parameters);
    }

    public async Task<PaymentResponse> ProcessPaymentAsync(
        decimal amount,
        string currency,
        string customerId)
    {
        try
        {
            var parameters = new PaymentCreateParams
            {
                Amount = (long)(amount * 100), // Convert to cents
                Currency = currency,
                CustomerID = customerId
            };

            return await _client.Payments.Create(parameters);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Failed to process payment");
            throw;
        }
    }
}

dotnet user-secrets init
dotnet user-secrets set "DodoPayments:ApiKey" "your_api_key_here"

using Xunit;
using DodoPayments.Client;
using DodoPayments.Client.Models.CheckoutSessions;

public class PaymentServiceTests
{
    private readonly DodoPaymentsClient _client;

    public PaymentServiceTests()
    {
        _client = new DodoPaymentsClient
        {
            BearerToken = "test_key"
        };
    }

    [Fact]
    public async Task CreateCheckout_ShouldReturnSession()
    {
        // Arrange
        var parameters = new CheckoutSessionCreateParams
        {
            ProductCart =
            [
                new()
                {
                    ProductID = "prod_test",
                    Quantity = 1
                }
            ]
        };

        // Act
        var session = await _client.CheckoutSessions.Create(parameters);

        // Assert
        Assert.NotNull(session);
        Assert.NotNull(session.SessionId);
    }
}