Clean Domain-driven Design article - Checkout

RequestHandler.cs

public class RequestHandler : TxRequestHandlerBase<CheckoutRequest, CheckoutResponse>
{
  public RequestHandler(IUnitOfWorkAsync uow, IQueryRepositoryFactory qrf)
    : base(uow, qrf)
  {
  }

  public override async Task<CheckoutResponse> Handle(CheckoutRequest request, CancellationToken cancellationToken)
  {
    var cartCommander = UnitOfWork.Repository<Domain.Cart>();
    var cartQuery = QueryFactory.QueryEfRepository<Domain.Cart>();

    var cart = await cartQuery.GetFullCartAsync(request.CartId);
    cart.Checkout();

    var checkoutCart = await cartCommander.UpdateAsync(cart);
    await UnitOfWork.SaveChangesAsync(cancellationToken);

    return new CheckoutResponse
    {
      IsSucceed = checkoutCart != null
    };
  }
}