Can send SDP back to server

lib/helpers/calls_helper.dart

@@ -1,7 +1,10 @@
+import 'dart:convert';
+
 import 'package:comunic/helpers/websocket_helper.dart';
 import 'package:comunic/lists/call_members_list.dart';
 import 'package:comunic/models/call_config.dart';
 import 'package:comunic/models/call_member.dart';
+import 'package:flutter_webrtc/rtc_session_description.dart';
 
 /// Calls helper
 ///
@@ -38,4 +41,14 @@ class CallsHelper {
   /// Request an offer to access another peer's stream
   static Future<void> requestOffer(int callID, int peerID) async =>
       await ws("calls/request_offer", {"callID": callID, "peerID": peerID});
+
+  /// Send a Session Description message to the server
+  static Future<void> sendSessionDescription(
+          int callID, int peerID, RTCSessionDescription sdp) async =>
+      await ws("calls/signal", {
+        "callID": callID,
+        "peerID": peerID,
+        "type": "SDP",
+        "data": jsonEncode(sdp.toMap())
+      });
 }

lib/ui/screens/call_screen.dart

@@ -184,8 +184,7 @@ class _CallScreenState extends SafeState<CallScreen> {
         if (ev.sessionDescription.type == "offer") {
           final answer = await _peersConnections[ev.peerID].createAnswer({});
 
-          //TODO : Send answer back to server
-          print("ANSWER TO SEND ${answer.toMap()}");
+          await CallsHelper.sendSessionDescription(convID, ev.peerID, answer);
         }
       }