protected override void HandleRemoteTransfer()

in src/Proton/Engine/Implementation/ProtonReceiver.cs [269:336]
58 lines of code
14 McCabe index (conditional complexity)

      protected override void HandleRemoteTransfer(Transfer transfer, IProtonBuffer payload, out ProtonIncomingDelivery delivery)
      {
         if (currentDeliveryId != null && (!transfer.HasDeliveryId() || currentDeliveryId.Equals(transfer.DeliveryId)))
         {
            delivery = unsettled[(uint)currentDeliveryId];
         }
         else
         {
            VerifyNewDeliveryIdSequence(transfer, currentDeliveryId);

            delivery = new(this, transfer.DeliveryId, transfer.DeliveryTag)
            {
               MessageFormat = transfer.MessageFormat
            };

            unsettled.Add(transfer.DeliveryId, delivery);
            currentDeliveryId = transfer.DeliveryId;
         }

         delivery.IncrementAndGetTransferCount();

         if (transfer.HasState())
         {
            delivery.RemoteState = transfer.DeliveryState;
         }

         if (transfer.Settled || transfer.Aborted)
         {
            delivery.RemotelySettled();
         }

         if (payload != null)
         {
            delivery.AppendTransferPayload(payload);
         }

         bool done = transfer.Aborted || !transfer.More;
         if (done)
         {
            CreditState.DecrementCredit();
            CreditState.IncrementDeliveryCount();
            currentDeliveryId = null;

            if (transfer.Aborted)
            {
               delivery.Aborted();
            }
            else
            {
               delivery.Completed();
            }
         }

         if (transfer.Aborted)
         {
            FireDeliveryAborted(delivery);
         }
         else
         {
            FireDeliveryRead(delivery);
         }

         if (IsDraining && Credit == 0)
         {
            drainStateSnapshot = null;
            FireCreditStateUpdated();
         }
      }