Added example schema

FitConnect/JsonSchemas/example.schema.json

+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "$id": "http://example.com/example.json",
+  "title": "Example Schema",
+  "description": "An example schema to play around with",
+  "type": "object",
+  "properties": {
+    "foo": {
+      "type": "string"
+    },
+    "bar": {
+      "type": "integer",
+      "minimum": 0
+    }
+  }
+}
\ No newline at end of file

FitConnect/Models/Submission.cs

@@ -22,6 +22,7 @@ public class Submission : SendableSubmission, ISubmissionBody {
     public MetadataDto? Metadata { get; internal set; }
 
     // public string? Data { get; internal set; }
+    public Uri? SchemaUri { get; set; }
     public string? EncryptedMetadata { get; internal set; }
     public string? EncryptedData { get; internal set; }
     public string? MetaAuthentication => EncryptedMetadata?.Split('.').Last();

FitConnect/Sender.cs

@@ -100,7 +100,7 @@ public class Sender : FitConnectClient, ISender {
     /// <exception cref="ArgumentNullException"></exception>
     /// <exception cref="ArgumentException"></exception>
     public async Task<SentSubmission> SendAsync(SendableEncryptedSubmission submission) {
-        SubmissionSenderGuards(submission);
+        await SubmissionSenderGuards(submission);
 
         var sendable = await CreateSubmission(submission);
         sendable.AddServiceType(submission.ServiceName!, submission.ServiceIdentifier!);
@@ -298,6 +298,25 @@ public class Sender : FitConnectClient, ISender {
 
         if (submission.Data == null)
             throw new ArgumentNullException(nameof(SendableSubmission.Data));
+
+        if (new Regex(LeikaKeyPattern).IsMatch(submission.LeikaKey) == false)
+            throw new ArgumentException("The leika key is not valid");
+
+        var destination = await DestinationService.GetDestinationAsync(submission.DestinationId);
+        var leikaMatch = destination?.Services.Any(s => s.Identifier == submission.LeikaKey) ??
+                         false;
+        if (!leikaMatch)
+            throw new ArgumentException("The leika key is not valid for the destination");
+
+        if (submission.SchemaUri == null)
+            return;
+
+        var schemaMatch = destination?.Services.Any(s =>
+            s.SubmissionSchemas.Any(schema =>
+                schema.SchemaUri == submission.SchemaUri.ToString())) ?? false;
+
+        if (!schemaMatch)
+            throw new ArgumentException("The schema uri is not valid for the destination");
     }
 }