ingoring destination metadata version

FitConnect/DestinationCapability.cs

@@ -17,5 +17,9 @@ public class DestinationCapability {
                 CanChunk = true;
         });
 
+        // TODO(kfischer): Remove this when SSP support chunking meta data version
+        #warning Remove this when SSP support chunking meta data version
+        CanChunk = true;
+
     }
 }

FitConnect/Sender.cs

@@ -303,9 +303,11 @@ public class Sender : FitConnectClient, ISender {
             created.SubmissionId, sendable.CaseId);
 
         Logger?.LogInformation("Uploading pre encrypted attachments");
-        foreach (var attachment in submission.Attachments) {
-            await UploadEncryptedAttachmentAsync(sendable.Id!, attachment.Key, attachment.Value);
-        }
+
+        if (submission.Attachments != null)
+            foreach (var attachment in submission.Attachments) {
+                await UploadEncryptedAttachmentAsync(sendable.Id!, attachment.Key, attachment.Value);
+            }
 
         if (submission.Attachments != null) {
             sendable.Attachments ??= new();
@@ -355,6 +357,10 @@ public class Sender : FitConnectClient, ISender {
 
             var introducedSubmission =
                 await CreateSubmissionOnServerAndUploadAttachments(sendableSubmission, isReply, publicKey?.ToJson());
+
+            if (introducedSubmission.Attachments != null && introducedSubmission.Attachments.Any(a => a is LargeAttachment) && !DestinationCapability.CanChunk)
+                throw new FitConnectSenderException("Destination does not support chunking");
+
             await UploadAttachmentsAsync(publicKey?.ToJson(), introducedSubmission);
             return (SentSubmission)await FinishSubmissionTransmission(introducedSubmission, publicKey);
         }