Most Efficient Way of Monitoring Messages in Specific Guild

[flakesbest]

Im working on a program that uses self tokens to monitor server messages for specific items being dropped and then will automatically redeem them with selenium, and I have a working method, but Im not sure if its the best (I will occasionally get errors about it when).

The check for messages in specific guild code I have right now is as follows:

@bot.event
async def on_message(message):
    if message.guild.id == GUILDID:

The error I usually get is: "AttributeError: 'NoneType' object has no attribute 'id'" and Im unsure how, or if I can fix it, or if there is a better way to monitor just one server.

EDIT: This error appears even if there are no new messages being sent in the server.

[JU5TDIE]

That's because on_message event also catches direct messages. Try with

@bot.event
async def on_message(message):
    if message.guild and message.guild.id == GUILDID: