example-config.yaml

# Homeserver details.
homeserver:
    # The address that this appservice can use to connect to the homeserver.
    address: https://matrix.example.com
    # The domain of the homeserver (also known as server_name, used for MXIDs, etc).
    domain: example.com

    # What software is the homeserver running?
    # Standard Matrix homeservers like Synapse, Dendrite and Conduit should just use "standard" here.
    software: standard
    # The URL to push real-time bridge status to.
    # If set, the bridge will make POST requests to this URL whenever a user's discord connection state changes.
    # The bridge will use the appservice as_token to authorize requests.
    status_endpoint: null
    # Endpoint for reporting per-message status.
    message_send_checkpoint_endpoint: null
    # Does the homeserver support https://github.com/matrix-org/matrix-spec-proposals/pull/2246?
    async_media: false

    # Should the bridge use a websocket for connecting to the homeserver?
    # The server side is currently not documented anywhere and is only implemented by mautrix-wsproxy,
    # mautrix-asmux (deprecated), and hungryserv (proprietary).
    websocket: false
    # How often should the websocket be pinged? Pinging will be disabled if this is zero.
    ping_interval_seconds: 0

# Application service host/registration related details.
# Changing these values requires regeneration of the registration.
appservice:
    # The address that the homeserver can use to connect to this appservice.
    address: http://localhost:29334

    # The hostname and port where this appservice should listen.
    hostname: 0.0.0.0
    port: 29334

    # Database config.
    database:
        # The database type. "sqlite3-fk-wal" and "postgres" are supported.
        type: postgres
        # The database URI.
        #   SQLite: A raw file path is supported, but `file:<path>?_txlock=immediate` is recommended.
        #           https://github.com/mattn/go-sqlite3#connection-string
        #   Postgres: Connection string. For example, postgres://user:password@host/database?sslmode=disable
        #             To connect via Unix socket, use something like postgres:///dbname?host=/var/run/postgresql
        uri: postgres://user:password@host/database?sslmode=disable
        # Maximum number of connections. Mostly relevant for Postgres.
        max_open_conns: 20
        max_idle_conns: 2
        # Maximum connection idle time and lifetime before they're closed. Disabled if null.
        # Parsed with https://pkg.go.dev/time#ParseDuration
        max_conn_idle_time: null
        max_conn_lifetime: null

    # The unique ID of this appservice.
    id: discord
    # Appservice bot details.
    bot:
        # Username of the appservice bot.
        username: discordbot
        # Display name and avatar for bot. Set to "remove" to remove display name/avatar, leave empty
        # to leave display name/avatar as-is.
        displayname: Discord bridge bot
        avatar: mxc://maunium.net/nIdEykemnwdisvHbpxflpDlC

    # Whether or not to receive ephemeral events via appservice transactions.
    # Requires MSC2409 support (i.e. Synapse 1.22+).
    ephemeral_events: true

    # Should incoming events be handled asynchronously?
    # This may be necessary for large public instances with lots of messages going through.
    # However, messages will not be guaranteed to be bridged in the same order they were sent in.
    async_transactions: false

    # Authentication tokens for AS <-> HS communication. Autogenerated; do not modify.
    as_token: "This value is generated when generating the registration"
    hs_token: "This value is generated when generating the registration"

# Bridge config
bridge:
    # Localpart template of MXIDs for Discord users.
    # {{.}} is replaced with the internal ID of the Discord user.
    username_template: discord_{{.}}
    # Displayname template for Discord users. This is also used as the room name in DMs if private_chat_portal_meta is enabled.
    # Available variables:
    #   .ID - Internal user ID
    #   .Username - Legacy display/username on Discord
    #   .GlobalName - New displayname on Discord
    #   .Discriminator - The 4 numbers after the name on Discord
    #   .Bot - Whether the user is a bot
    #   .System - Whether the user is an official system user
    #   .Webhook - Whether the user is a webhook and is not an application
    #   .Application - Whether the user is an application
    displayname_template: '{{or .GlobalName .Username}}{{if .Bot}} (bot){{end}}'
    # Displayname template for Discord channels (bridged as rooms, or spaces when type=4).
    # Available variables:
    #   .Name - Channel name, or user displayname (pre-formatted with displayname_template) in DMs.
    #   .ParentName - Parent channel name (used for categories).
    #   .GuildName - Guild name.
    #   .NSFW - Whether the channel is marked as NSFW.
    #   .Type - Channel type (see values at https://github.com/bwmarrin/discordgo/blob/v0.25.0/structs.go#L251-L267)
    channel_name_template: '{{if or (eq .Type 3) (eq .Type 4)}}{{.Name}}{{else}}#{{.Name}}{{end}}'
    # Displayname template for Discord guilds (bridged as spaces).
    # Available variables:
    #   .Name - Guild name
    guild_name_template: '{{.Name}}'
    # Whether to explicitly set the avatar and room name for private chat portal rooms.
    # If set to `default`, this will be enabled in encrypted rooms and disabled in unencrypted rooms.
    # If set to `always`, all DM rooms will have explicit names and avatars set.
    # If set to `never`, DM rooms will never have names and avatars set.
    private_chat_portal_meta: default

    # Publicly accessible base URL that Discord can use to reach the bridge, used for avatars in relay mode.
    # If not set, avatars will not be bridged. Only the /mautrix-discord/avatar/{server}/{id}/{hash} endpoint is used on this address.
    # This should not have a trailing slash, the endpoint above will be appended to the provided address.
    public_address: null
    # A random key used to sign the avatar URLs. The bridge will only accept requests with a valid signature.
    avatar_proxy_key: generate

    portal_message_buffer: 128

    # Number of private channel portals to create on bridge startup.
    # Other portals will be created when receiving messages.
    startup_private_channel_create_limit: 5
    # Should the bridge send a read receipt from the bridge bot when a message has been sent to Discord?
    delivery_receipts: false
    # Whether the bridge should send the message status as a custom com.beeper.message_send_status event.
    message_status_events: false
    # Whether the bridge should send error notices via m.notice events when a message fails to bridge.
    message_error_notices: true
    # Should the bridge use space-restricted join rules instead of invite-only for guild rooms?
    # This can avoid unnecessary invite events in guild rooms when members are synced in.
    restricted_rooms: true
    # Should the bridge automatically join the user to threads on Discord when the thread is opened on Matrix?
    # This only works with clients that support thread read receipts (MSC3771 added in Matrix v1.4).
    autojoin_thread_on_open: true
    # Should inline fields in Discord embeds be bridged as HTML tables to Matrix?
    # Tables aren't supported in all clients, but are the only way to emulate the Discord inline field UI.
    embed_fields_as_tables: true
    # Should guild channels be muted when the portal is created? This only meant for single-user instances,
    # it won't mute it for all users if there are multiple Matrix users in the same Discord guild.
    mute_channels_on_create: false
    # Should the bridge update the m.direct account data event when double puppeting is enabled.
    # Note that updating the m.direct event is not atomic (except with mautrix-asmux)
    # and is therefore prone to race conditions.
    sync_direct_chat_list: false
    # Set this to true to tell the bridge to re-send m.bridge events to all rooms on the next run.
    # This field will automatically be changed back to false after it, except if the config file is not writable.
    resend_bridge_info: false
    # Should incoming custom emoji reactions be bridged as mxc:// URIs?
    # If set to false, custom emoji reactions will be bridged as the shortcode instead, and the image won't be available.
    custom_emoji_reactions: true
    # Should the bridge attempt to completely delete portal rooms when a channel is deleted on Discord?
    # If true, the bridge will try to kick Matrix users from the room. Otherwise, the bridge only makes ghosts leave.
    delete_portal_on_channel_delete: false
    # Should the bridge delete all portal rooms when you leave a guild on Discord?
    # This only applies if the guild has no other Matrix users on this bridge instance.
    delete_guild_on_leave: true
    # Whether or not created rooms should have federation enabled.
    # If false, created portal rooms will never be federated.
    federate_rooms: true
    # Prefix messages from webhooks with the profile info? This can be used along with a custom displayname_template
    # to better handle webhooks that change their name all the time (like ones used by bridges).
    prefix_webhook_messages: false
    # Bridge webhook avatars?
    enable_webhook_avatars: true
    # Should the bridge upload media to the Discord CDN directly before sending the message when using a user token,
    # like the official client does? The other option is sending the media in the message send request as a form part
    # (which is always used by bots and webhooks).
    use_discord_cdn_upload: true
    # Proxy for Discord connections
    proxy:
    # Should mxc uris copied from Discord be cached?
    # This can be `never` to never cache, `unencrypted` to only cache unencrypted mxc uris, or `always` to cache everything.
    # If you have a media repo that generates non-unique mxc uris, you should set this to never.
    cache_media: unencrypted
    # Settings for converting Discord media to custom mxc:// URIs instead of reuploading.
    # More details can be found at https://docs.mau.fi/bridges/go/discord/direct-media.html
    direct_media:
        # Should custom mxc:// URIs be used instead of reuploading media?
        enabled: false
        # The server name to use for the custom mxc:// URIs.
        # This server name will effectively be a real Matrix server, it just won't implement anything other than media.
        # You must either set up .well-known delegation from this domain to the bridge, or proxy the domain directly to the bridge.
        server_name: discord-media.example.com
        # Optionally a custom .well-known response. This defaults to `server_name:443`
        well_known_response:
        # The bridge supports MSC3860 media download redirects and will use them if the requester supports it.
        # Optionally, you can force redirects and not allow proxying at all by setting this to false.
        allow_proxy: true
        # Matrix server signing key to make the federation tester pass, same format as synapse's .signing.key file.
        # This key is also used to sign the mxc:// URIs to ensure only the bridge can generate them.
        server_key: generate
    # Settings for converting animated stickers.
    animated_sticker:
        # Format to which animated stickers should be converted.
        # disable - No conversion, send as-is (lottie JSON)
        # png - converts to non-animated png (fastest)
        # gif - converts to animated gif
        # webm - converts to webm video, requires ffmpeg executable with vp9 codec and webm container support
        # webp - converts to animated webp, requires ffmpeg executable with webp codec/container support
        target: webp
        # Arguments for converter. All converters take width and height.
        args:
            width: 320
            height: 320
            fps: 25 # only for webm, webp and gif (2, 5, 10, 20 or 25 recommended)
    # Servers to always allow double puppeting from
    double_puppet_server_map:
        example.com: https://example.com
    # Allow using double puppeting from any server with a valid client .well-known file.
    double_puppet_allow_discovery: false
    # Shared secrets for https://github.com/devture/matrix-synapse-shared-secret-auth
    #
    # If set, double puppeting will be enabled automatically for local users
    # instead of users having to find an access token and run `login-matrix`
    # manually.
    login_shared_secret_map:
        example.com: foobar

    # The prefix for commands. Only required in non-management rooms.
    command_prefix: '!discord'
    # Messages sent upon joining a management room.
    # Markdown is supported. The defaults are listed below.
    management_room_text:
        # Sent when joining a room.
        welcome: "Hello, I'm a Discord bridge bot."
        # Sent when joining a management room and the user is already logged in.
        welcome_connected: "Use `help` for help."
        # Sent when joining a management room and the user is not logged in.
        welcome_unconnected: "Use `help` for help or `login` to log in."
        # Optional extra text sent when joining a management room.
        additional_help: ""

    # Settings for backfilling messages.
    backfill:
        # Limits for forward backfilling.
        forward_limits:
            # Initial backfill (when creating portal). 0 means backfill is disabled.
            # A special unlimited value is not supported, you must set a limit. Initial backfill will
            # fetch all messages first before backfilling anything, so high limits can take a lot of time.
            initial:
                dm: 0
                channel: 0
                thread: 0
            # Missed message backfill (on startup).
            # 0 means backfill is disabled, -1 means fetch all messages since last bridged message.
            # When using unlimited backfill (-1), messages are backfilled as they are fetched.
            # With limits, all messages up to the limit are fetched first and backfilled afterwards.
            missed:
                dm: 0
                channel: 0
                thread: 0
        # Maximum members in a guild to enable backfilling. Set to -1 to disable limit.
        # This can be used as a rough heuristic to disable backfilling in channels that are too active.
        # Currently only applies to missed message backfill.
        max_guild_members: -1

    # End-to-bridge encryption support options.
    #
    # See https://docs.mau.fi/bridges/general/end-to-bridge-encryption.html for more info.
    encryption:
        # Allow encryption, work in group chat rooms with e2ee enabled
        allow: false
        # Default to encryption, force-enable encryption in all portals the bridge creates
        # This will cause the bridge bot to be in private chats for the encryption to work properly.
        default: false
        # Whether to use MSC2409/MSC3202 instead of /sync long polling for receiving encryption-related data.
        appservice: false
        # Require encryption, drop any unencrypted messages.
        require: false
        # Enable key sharing? If enabled, key requests for rooms where users are in will be fulfilled.
        # You must use a client that supports requesting keys from other users to use this feature.
        allow_key_sharing: false
        # Should users mentions be in the event wire content to enable the server to send push notifications?
        plaintext_mentions: false
        # Options for deleting megolm sessions from the bridge.
        delete_keys:
            # Beeper-specific: delete outbound sessions when hungryserv confirms
            # that the user has uploaded the key to key backup.
            delete_outbound_on_ack: false
            # Don't store outbound sessions in the inbound table.
            dont_store_outbound: false
            # Ratchet megolm sessions forward after decrypting messages.
            ratchet_on_decrypt: false
            # Delete fully used keys (index >= max_messages) after decrypting messages.
            delete_fully_used_on_decrypt: false
            # Delete previous megolm sessions from same device when receiving a new one.
            delete_prev_on_new_session: false
            # Delete megolm sessions received from a device when the device is deleted.
            delete_on_device_delete: false
            # Periodically delete megolm sessions when 2x max_age has passed since receiving the session.
            periodically_delete_expired: false
            # Delete inbound megolm sessions that don't have the received_at field used for
            # automatic ratcheting and expired session deletion. This is meant as a migration
            # to delete old keys prior to the bridge update.
            delete_outdated_inbound: false
        # What level of device verification should be required from users?
        #
        # Valid levels:
        #   unverified - Send keys to all device in the room.
        #   cross-signed-untrusted - Require valid cross-signing, but trust all cross-signing keys.
        #   cross-signed-tofu - Require valid cross-signing, trust cross-signing keys on first use (and reject changes).
        #   cross-signed-verified - Require valid cross-signing, plus a valid user signature from the bridge bot.
        #                           Note that creating user signatures from the bridge bot is not currently possible.
        #   verified - Require manual per-device verification
        #              (currently only possible by modifying the `trust` column in the `crypto_device` database table).
        verification_levels:
            # Minimum level for which the bridge should send keys to when bridging messages from WhatsApp to Matrix.
            receive: unverified
            # Minimum level that the bridge should accept for incoming Matrix messages.
            send: unverified
            # Minimum level that the bridge should require for accepting key requests.
            share: cross-signed-tofu
        # Options for Megolm room key rotation. These options allow you to
        # configure the m.room.encryption event content. See:
        # https://spec.matrix.org/v1.3/client-server-api/#mroomencryption for
        # more information about that event.
        rotation:
            # Enable custom Megolm room key rotation settings. Note that these
            # settings will only apply to rooms created after this option is
            # set.
            enable_custom: false
            # The maximum number of milliseconds a session should be used
            # before changing it. The Matrix spec recommends 604800000 (a week)
            # as the default.
            milliseconds: 604800000
            # The maximum number of messages that should be sent with a given a
            # session before changing it. The Matrix spec recommends 100 as the
            # default.
            messages: 100

            # Disable rotating keys when a user's devices change?
            # You should not enable this option unless you understand all the implications.
            disable_device_change_key_rotation: false

    # Settings for provisioning API
    provisioning:
        # Prefix for the provisioning API paths.
        prefix: /_matrix/provision
        # Shared secret for authentication. If set to "generate", a random secret will be generated,
        # or if set to "disable", the provisioning API will be disabled.
        shared_secret: generate
        # Enable debug API at /debug with provisioning authentication.
        debug_endpoints: false

    # Permissions for using the bridge.
    # Permitted values:
    #    relay - Talk through the relaybot (if enabled), no access otherwise
    #     user - Access to use the bridge to chat with a Discord account.
    #    admin - User level and some additional administration tools
    # Permitted keys:
    #        * - All Matrix users
    #   domain - All users on that homeserver
    #     mxid - Specific user
    permissions:
        "*": relay
        "example.com": user
        "@admin:example.com": admin

# Logging config. See https://github.com/tulir/zeroconfig for details.
logging:
    min_level: debug
    writers:
    - type: stdout
      format: pretty-colored
    - type: file
      format: json
      filename: ./logs/mautrix-discord.log
      max_size: 100
      max_backups: 10
      compress: true