Drop reaction messages

js/models/messages.js

@@ -1837,6 +1837,13 @@
           `Starting handleDataMessage for message ${message.idForLogging()} in conversation ${conversation.idForLogging()}`
         );
 
+        // Drop reaction messages at this time
+        if (initialMessage.reaction) {
+          window.log.info('Dropping reaction message', this.idForLogging());
+          confirm();
+          return;
+        }
+
         // First, check for duplicates. If we find one, stop processing here.
         const existingMessage = await getMessageBySender(this.attributes, {
           Message: Whisper.Message,

protos/SignalService.proto

@@ -169,6 +169,14 @@ message DataMessage {
     optional AttachmentPointer data = 4;
   }
 
+  message Reaction {
+    optional string emoji            = 1;
+    optional bool   remove           = 2;
+    optional string targetAuthorE164 = 3;
+    optional string targetAuthorUuid = 4;
+    optional uint64 targetTimestamp  = 5;
+  }
+
   enum ProtocolVersion {
     option allow_alias = true;
 
@@ -176,7 +184,8 @@ message DataMessage {
     MESSAGE_TIMERS  = 1;
     VIEW_ONCE       = 2;
     VIEW_ONCE_VIDEO = 3;
-    CURRENT         = 3;
+    REACTIONS       = 4;
+    CURRENT         = 4;
   }
 
   optional string             body                    = 1;
@@ -192,6 +201,7 @@ message DataMessage {
   optional Sticker            sticker                 = 11;
   optional uint32             requiredProtocolVersion = 12;
   optional bool               isViewOnce              = 14;
+  optional Reaction           reaction                = 16;
 }
 
 message NullMessage {