The ChatKC Protocol

ChatKC is a protocol that originated from MattKC's website here and reverse engineered by Breadpudding and janKonku on January 16th, 2023. After playing around with the protocol for hours, MattKC found us hanging out and decided to tweak the protocol a bit to make things easier for us to work with. This document describes the protocol that was created as a result.

Connectivity

In order to connect to a ChatKC server, you must establish a secure WebSocket connection to TCP port 2002 and send the "hello" event to the server. Once the server sends the initial burst of "message" events followed by "join" events, bidirectional communication can take place.

Event Format

All events sent to and received from the server are JSON objects containing the type and data attributes. The type attribute will always be a string that describes the information found in the data attribute.

In addition to those two fields, events sent to the server are required to have the auth and token attributes. In the reference implementation of the server, auth is always set to the string "google" and token is set to your OAuth2 token.

Event Types

Clientbound Event Types

accepted

This event means that the server has acknowledged the last message you sent. The data for this type is an object with the message attribute set to the content of your last message.

Example:

{
    "type": "accepted",
    "data": {
        "message": "Hello world!"
    }
}

authlevel

This event informs the client of their current authentication level. The data for this type is an object with the value attribute set to a number corresponding to your current authentication level.

Example:

{
    "type": "authlevel",
    "data": {
        "value": 0
    }
}

chat

This event informs the client of a new message. The data for this type is an object with the following attributes:

Name	Type	Description
auth	number	Unknown
author	string	The name of the user who created the message
author_color	string	The hexadecimal color code of the user's preferred name color
author_id	number	The identifier of the message author
author_level	number	The authentication level of the message author
donate_value	string	The donation amount given in USD (or an empty string for no donation)
id	number	The identifier of the message itself
message	string	The contents of the message
reply	number	The identifier of the message being replied to (0 if none)
time	number	The timestamp of when the message was created in milliseconds since the Unix epoch

Example:

{
    "type": "chat",
    "data": {
        "auth": 0,
        "author": "Breadpudding",
        "author_color": "B3DCF5",
        "author_id": 2268,
        "author_level": 0,
        "donate_value": "2.00",
        "id": 15225,
        "message": "Hello world!",
        "reply": 0,
        "time": 1674090083882
    }
}

delete

This event informs the client that the list of message identifiers given have been deleted from the server. The data for this type is an object with the messages attribute which is an array of message IDs.

Example:

{
    "type": "delete",
    "data": {
        "messages": [
            15221,
            15222,
            15223,
            15224,
            15225
        ]
    }
}

getuserconf

This event informs the client of the user's current configuration. The data for this type is an object with the color and name attributes, where the color attribute is the user's name color in hexadecimal and the name attribute is the current username.

Example:

{
    "type": "getuserconf",
    "data": {
        "color": "B3DCF5",
        "name": "Breadpudding"
    }
}

join

This event informs the client that a member has joined the chat. The data for this type is an object with the name attribute set to the member's name.

Example:

{
    "type": "join",
    "data": {
        "name": "Breadpudding"
    }
}

part

This event informs the client that a member has left the chat. The data for this type is an object with the name attribute set to the member's name.

Example:

{
    "type": "part",
    "data": {
        "name": "Breadpudding"
    }
}

servermsg

This event contains a message from the server to the client. This message is only visible to the client that received it and is typically used for error messages. The data for this type is an object with the message attribute.

Example:

{
    "type": "servermsg",
    "data": {
        "message": "Available commands: commands, forum, forums, geoguessr, help, info, insta, instagram, time, timer, twitter, website, youtube, yt"
    }
}

status

This event informs the client of their current status. The data for this type is an object with the status attribute set to the current status.

Example:

{
    "type": "status",
    "data": {
        "status": "authenticated"
    }
}

Status Code
authenticated
banned
nameexists
nameinvalid
namelength
nametimeout
rename
setuserconf
unauthenticated

Serverbound Event Types

getuserconf

This event is used to ask the server for the client's current configuration. There is no data field for this event.

Example:

{
    "type": "getuserconf",
    "auth": "google",
    "token": "..."
}

hello

This event is used to introduce the client to the server. The data for this type is an object with the last_message attribute set to -1. Currently, we do not know why this data is sent.

Example:

{
    "type": "hello",
    "data": {
        "last_message": -1
    },
    "auth": "google",
    "token": "..."
}

message

This event is used to send a message to the server. The data for this type is an object with the following attributes:

Name	Type	Description
reply	number	The ID of the message that this message is a reply of (0 for none)
text	string	The content of the message being sent

Example:

{
    "type": "message",
    "data": {
        "text": "Hello world!",
        "reply": 0
    },
    "auth": "google",
    "token": "..."
}

paypal

This event is used to donate money to the owner of the server.

Example:

{
    "type": "paypal",
    "data": {
        // A lot of this isn't safe to put in documentation
    },
    "auth": "google",
    "token": "..."
}

setuserconf

This event is used to store the client's current configuration on the server. The data for this type is an object containing the color and name attributes.

Example:

{
    "type": "setuserconf",
    "data": {
        "name": "Breadpudding",
        "color": "B3DCF5"
    },
    "auth": "google",
    "token": "..."
}

status

This event is used to request a status update from the server. The data for this type is an empty object.

Example:

{
    "type": "status",
    "data": {},
    "auth": "google",
    "token": "..."
}

Commands

Commands are actions performed by users using messages prefixed with an exclamation point.

ban

Usage: !ban <username>

Summary: Bans a user from the chat

Minimum Authentication Level: Unknown

help

Aliases: commands

Usage: !help

Summary: Lists all of the commands that the user has access to

Minimum Authentication Level: 0

info

Usage: !info

Summary: Displays information about the server

Minimum Authentication Level: 0

ipban

Usage: !ipban <address>

Summary: Blocks a specific IP address from sending messages

Minimum Authentication Level: Unknown

mod

Usage: !mod <username>

Summary: Promotes a user to a moderator

Minimum Authentication Level: Unknown

rm

Usage: !rm <message id>

Summary: Deletes a message from the chat

Minimum Authentication Level: Unknown

time

Usage: !time

Summary: Displays the current time on the server

Minimum Authentication Level: 0

timer

Usage: !timer <start/check/stop> <name>

Summary: Creates, checks, or deletes a timer on the server

Minimum Authentication Level: 0

unban

Usage: !unban <username>

Summary: Reverts an existing ban on a user

Minimum Authentication Level: Unknown

unmod

Usage: !unmod <username>

Summary: Demotes a user to an unprivileged member

Minimum Authentication Level: Unknown

Message Formatting

TODO

Emoji

The emoji system is still very unknown, but it seems that they are pulled from an array or table.

https://stream.mattkc.com/chat/emotes/

Mentions

TODO

URLs

TODO

Authentication Levels

The following is a list of the currently known authentication levels:

Level	Meaning
0	An unprivileged member of the server
50	Server moderator
100	The owner of the server

Permissions

Level	!ban	!ipban	!mod	!rm	!unban	!unmod
0	No	No	No	No	No	No
50	Unknown	Unknown	Unknown	Yes	Unknown	Unknown
100	Yes	Yes	Yes	Yes	Yes	Yes