Client Basics Questions
My client keeps returning 401 upon logging in!
There are few possible reasons why this may occur.
1. You are not using the appropriate TokenType.
If you are using a bot account created from the Discord Developer
portal, you should be using TokenType.Bot.
2. You are not using the correct login credentials.
Please keep in mind that tokens start with Mj*.
If it starts with any other characters, chances are, you might be
using the client secret, which has nothing to do with the login
token.
How do I do X, Y, Z when my bot connects/logs on? Why do I get a NullReferenceException upon calling any client methods after connect?
Your bot should not attempt to interact in any way with guilds/servers
until the Ready event fires. When the bot connects, it first has to
download guild information from Discord in order for you to get
access to any server information; the client is not ready at this
point.
Technically, the GuildAvailable event fires once the data for a
particular guild has downloaded; however, it's best to wait for all
guilds to be downloaded. Once all downloads are complete, the Ready
event is triggered, then you can proceed to do whatever you like.
How do I get a message's previous content when that message is edited?
If you need to do anything with messages (e.g. checking Reactions,
checking the content of edited/deleted messages), you must set the
MessageCacheSize in your DiscordSocketConfig settings in order to
use the cached message entity. Read more about it here.
- Message Cache must be enabled.
- Hook the MessageUpdated event. This event provides a before and
after object.
- Only messages received after the bot comes online will be
available in the cache.
