public async Task <IOperationResult> HandleAsync(IUpdatePayment command, ICorrelationContext context)
{
var payment = await _paymentsRepository.GetAsync(command.Id);
if (payment is null)
{
throw new BaristaException("payment_not_found", $"Payment with ID '{command.Id}' was not found");
}
await _userVerifier.AssertExists(command.UserId);
payment.SetUserId(command.UserId);
payment.SetAmount(command.Amount);
payment.SetExternalId(command.ExternalId);
payment.SetSource(command.Source);
await _paymentsRepository.UpdateAsync(payment);
await _paymentsRepository.SaveChanges();
await _busPublisher.Publish(new PaymentUpdated(payment));
return(OperationResult.Ok());
}