making ice candidates write to DB properly

RelayClient/MainPage.xaml.cs

@@ -479,8 +479,21 @@ public partial class MainPage : ContentPage
 
     public async void WriteIceCandidate(string json)
     {
-        IceCandidate? candidate = JsonSerializer.Deserialize<IceCandidate>(json);
-        await ServerAPI.PostIceCandidateAsync(candidate);
+        try
+        {
+            IceCandidate? candidate = JsonSerializer.Deserialize<IceCandidate>(json);
+            DBIceCandidate DBCandidate = new DBIceCandidate
+            {
+                ChannelId = _currentChannelId,
+                Username = _username,
+                Candidate = candidate
+            };
+            await ServerAPI.PostIceCandidateAsync(DBCandidate);
+        }
+        catch (Exception ex)
+        {
+            SafeSendRawToWebView("WriteIceCandidate failed: " + ex.Message);
+        }
     }
 
     public async void IceCandidateCallback(string json)

RelayClient/Resources/Raw/wwwroot/index.js

@@ -24,7 +24,7 @@ window.setChannelId = function(channelId) {
     currentChannelId = channelId;
     LogMessage("Channel set to: " + currentChannelId);
 };
-
+let userMedia = getUserMedia()
 function LogMessage(msg) {
     const messageLog = document.getElementById("messageLog");
     messageLog.value += '\r\n' + msg;
@@ -212,9 +212,10 @@ async function ensurePeerConnection2()
         console.log(`ICE connection state change: ${peerConnection.iceConnectionState}`); 
     };
     
-    peerConnection.onicecandidate = (event) => {
+    peerConnection.onicecandidate = async (event) => {
         console.log(`Ice Candidate: ${JSON.stringify(event.candidate)}`);
         LogMessage(`Ice Candidate: ${JSON.stringify(event.candidate)}`);
+        await window.HybridWebView.InvokeDotNet("WriteIceCandidate", [JSON.stringify(event.candidate)]);
     };
     
     peerConnection.ontrack = (event) => {

RelayClient/ServerAPI.cs

@@ -71,7 +71,7 @@ public class ServerAPI
         return response.Headers.Location;
     }
 
-    public static async Task<Uri> PostIceCandidateAsync(IceCandidate candidate)
+    public static async Task<Uri> PostIceCandidateAsync(DBIceCandidate candidate)
     {
         HttpResponseMessage response = await client.PostAsJsonAsync("api/rtc/candidate", candidate);
         response.EnsureSuccessStatusCode();
@@ -127,8 +127,18 @@ public class DBOffer
 }
 public class IceCandidate
 {
-    public string type { get; set; }
-    public string sdp { get; set; }
+    public required string candidate { get; set; }
+    public required string sdpMid { get; set; }
+    public required int sdpMLineIndex { get; set; }
+    public required string usernameFragment { get; set; }
+    
+}
+
+public class DBIceCandidate
+{
+    public required string ChannelId { get; set; }
+    public required string Username { get; set; }
+    public required IceCandidate Candidate { get; set; }
 }
 
 public class RtcLeave