Discord => Mattermost Avatars show as bot avatar

[Aetherinox]

Summary

• Mattermost => Discord (Avatar works)
• Discord => Mattermost (Default bot avatar)

I'm not sure if this is a bug, or the intended behavior.

I have Discord and Mattermost bridged.

As a Mattermost user, when I chat and it shows on Discord, I see the correct avatar. However, if I send a message from Discord and it shows on the Mattermost server, I see the default avatar for the bot I've created.

[mattermost]
    [mattermost.mymattermost]
    Server="mm.domain.com"
    Team="default"
    Token="**********************"
    PrefixMessagesWithNick=true
    RemoteNickFormat="**{NICK} **\n"
    PreserveThreading=false
    UseUserName=false

[discord]
    [discord.mydiscord]
    Token="*******************************"
    Server="100000000000000000"
    AutoWebhooks=true
    AlwaysDownloadFiles=true
    RemoteNickFormat="{NICK}"
    UseLocalAvatar=["discord"]
    PreserveThreading=false
    IgnoreBots=false
    UseUserName=false

I've played around with many of the settings including UseLocalAvatar with Mattermost, I've tried the full service name such as discord.mydiscord and just discord, and nothing appears to fix the avatar issue on Mattermost.

So I'm not even sure if this is the intended behavior, or if I'm missing something.

[SwirlyStone5877]

IIRC Mattermost to Discord avatars work because the bridge uses webhooks for the Discord side (see AutoWebhooks=true in your config), meaning that messages can be sent with individual avatars, names, etc. Unless Mattermost were to support puppeteering (I've got no experience with Mattermost so please correct me if I am wrong) this wouldn't be possible.

[AlexanderShK]

I haven't had a chance to try it myself yet, but I think to spoof avatars in Mattermost, you'll need to set up your own media server. The old official wiki suggests using Caddy for this. You can find the details in the Username and avatar spoofing section here