safeguards for bot (dm exp, self react exp)

app.py

@@ -636,10 +636,12 @@ async def on_reaction_add(reaction, user):
     try:
         if user.id not in bot_ids:
             print(f"adding exp from react {user}")
-            await asyncio.sleep(0.1)            
-            await add_exp(user.id)
+            await asyncio.sleep(0.1) 
+            if not isinstance(message.channel, discord.DMChannel): # can't earn exp from DMing the bot, which is harder to track
+                await add_exp(user.id)
             await asyncio.sleep(0.1)
-            await add_exp(reaction.message.author.id)
+            if reaction.message.author.id != user.id: # can't earn while self-reacting, which is abuseable
+                await add_exp(reaction.message.author.id)
     except Exception as e:
         print(f"on_reaction_add Error: {e}")