social-media/backend/Infrastructure/Payments/Stripe/Services/StripeTipProcessor.cs

using Hutopy.Infrastructure.Payments.Stripe.Configuration;
using Hutopy.Modules.Creators.Contracts;
using Hutopy.Modules.Tipping.Contracts;
using Microsoft.Extensions.Options;
using Stripe;
using Stripe.Checkout;

namespace Hutopy.Infrastructure.Payments.Stripe.Services;

internal class StripeTipProcessor(
    IOptions<StripeOptions> stripeOptions)
    : ITipProcessor
{
    public async Task<TipCheckoutSession> CreateCheckoutSessionAsync(
        Guid tipId,
        CreatorReference creator,
        decimal amount,
        string currency,
        string message,
        Uri successUrl,
        Uri cancelUrl,
        CancellationToken ct = default)
    {
        var applicationFeeAmount = Convert.ToInt64(amount * stripeOptions.Value.HutopyRate);

        StripeConfiguration.ApiKey = stripeOptions.Value.SecretKey;

        var sessionService = new SessionService();

        var options = new SessionCreateOptions
        {
            ClientReferenceId = tipId.ToString(),
            Mode = "payment",
            LineItems =
            [
                new SessionLineItemOptions
                {
                    PriceData = new SessionLineItemPriceDataOptions
                    {
                        Currency = currency,
                        UnitAmountDecimal = amount, // Amount in cents
                        ProductData = new SessionLineItemPriceDataProductDataOptions
                        {
                            Name = $"Tip for {creator.Name}",
                            Metadata = new Dictionary<string, string> { { "creatorId", creator.Id.ToString() } }
                        }
                    },
                    Quantity = 1
                }
            ],
            PaymentIntentData = new SessionPaymentIntentDataOptions { ApplicationFeeAmount = applicationFeeAmount },
            Metadata = new Dictionary<string, string>
            {
                { "creatorId", creator.Id.ToString() }, { "creatorName", creator.Name }, { "message", message }
            },
            SuccessUrl = successUrl.ToString(), // Redirect after successful payment
            CancelUrl = cancelUrl.ToString(), // Redirect after canceled payment
        };

        var requestOptions = new RequestOptions { StripeAccount = creator.StripeAccountId };

        var session = await sessionService.CreateAsync(
                options,
                requestOptions,
                cancellationToken: ct)
            .ConfigureAwait(false);

        return new TipCheckoutSession(session.Id, session.Url);
    }
}