ANTOOZA-BACKEND/Web.Api/Endpoints/Payment/Cancel.cs

using Web.Api.Common;
using Web.Api.Extensions;
using Application.Abstractions.Messaging;
using System.Security.Claims;

namespace Web.Api.Endpoints.Payment;

/// <summary>토스 결제 취소</summary>
internal sealed class Cancel : IEndpoint
{
    public sealed record Request(string OrderID, string? CancelReason);

    public void MapEndpoint(IEndpointRouteBuilder app)
    {
        /// 결제 전액 취소 (Paid 상태만 가능) → 토스 취소 API + 지갑 충전분 회수
        app.MapPost("api/payments/cancel", async (
            Request body,
            ClaimsPrincipal user,
            ISender sender,
            CancellationToken ct
        ) => {
            var memberID = user.GetRequiredMemberID();
            var result = await sender.Send(new Application.Features.Api.Payment.Toss.Cancel.Command(body.OrderID, body.CancelReason, memberID), ct);

            if (result.IsFailure)
            {
                return CustomResults.Problem(result);
            }

            return ApiResponse.Ok();
        })
        .WithTags("Payment")
        .RequireAuthorization();
    }
}