feat(eventsub): use special flag and timestamps from metadata (#5996)

src/providers/twitch/eventsub/Connection.cpp

@@ -12,6 +12,7 @@
 #include "providers/twitch/TwitchIrcServer.hpp"
 #include "singletons/Settings.hpp"
 #include "singletons/WindowManager.hpp"
+#include "util/Helpers.hpp"
 #include "util/PostToThread.hpp"
 
 #include <boost/json.hpp>
@@ -148,11 +149,7 @@ void Connection::onChannelModerate(
         return;
     }
 
-    auto now = QDateTime::currentDateTime();
-    if (getApp()->isTest())
-    {
-        now = QDateTime::fromSecsSinceEpoch(0).toUTC();
-    }
+    auto now = chronoToQDateTime(metadata.messageTimestamp);
 
     std::visit(
         [&](auto &&action) {

src/providers/twitch/eventsub/MessageBuilder.cpp

@@ -41,8 +41,8 @@ EventSubMessageBuilder::EventSubMessageBuilder(TwitchChannel *channel,
                                                const QDateTime &time)
     : channel(channel)
 {
-    this->emplace<TimestampElement>();
-    this->message().flags.set(MessageFlag::System);
+    this->emplace<TimestampElement>(time.time());
+    this->message().flags.set(MessageFlag::System, MessageFlag::EventSub);
     this->message().flags.set(MessageFlag::Timeout);  // do we need this?
     this->message().serverReceivedTime = time;
 }