computer-playbook/roles/web-app-matrix/templates/mautrix/slack.config.yml.j2

# Homeserver details.
homeserver:
    # The address that this appservice can use to connect to the homeserver.
    address: http://synapse:8008
    # The domain of the homeserver (also known as server_name, used for MXIDs, etc).
    domain: {{ MATRIX_SERVER_NAME }}

    # 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 slack 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://mautrix-slack:29335

    # The hostname and port where this appservice should listen.
    hostname: 0.0.0.0
    port: 29335

    # 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://mautrix_slack_bridge:{{ applications | get_app_conf(application_id, 'credentials.mautrix_slack_bridge_database_password', True)}}@{{ database_host }}/mautrix_slack_bridge?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: slack
    # Appservice bot details.
    bot:
        # Username of the appservice bot.
        username: slackbot
        # Display name and avatar for bot. Set to "remove" to remove display name/avatar, leave empty
        # to leave display name/avatar as-is.
        displayname: Slack bridge bot
        avatar: mxc://maunium.net/pVtzLmChZejGxLqmXtQjFxem

    # Whether or not to receive ephemeral events via appservice transactions.
    # Requires MSC2409 support (i.e. Synapse 1.22+).
    # You should disable bridge -> sync_with_custom_puppets when this is enabled.
    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:
{% raw %}
    # Localpart template of MXIDs for Slack users.
    # {{.}} is replaced with the internal ID of the Slack user.
    username_template: slack_{{.}}
    # Displayname template for Slack users.
    # TODO: document variables
    displayname_template: '{{.RealName}} (S)'
    bot_displayname_template: '{{.Name}} (bot)'
    channel_name_template: '#{{.Name}}'
{% endraw %}
    portal_message_buffer: 128

    # Should the bridge send a read receipt from the bridge bot when a message has been sent to Slack?
    delivery_receipts: true
    # 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 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 sync with double puppeting to receive EDUs that aren't normally sent to appservices.
    sync_with_custom_puppets: 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
    # Whether or not created rooms should have federation enabled.
    # If false, created portal rooms will never be federated.
    federate_rooms: true
    # 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

    # Servers to always allow double puppeting from
    double_puppet_server_map:
        {{ MATRIX_SERVER_NAME }}: {{ MATRIX_SYNAPSE_URL }}
    # 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:
        {{ MATRIX_SERVER_NAME }}: {{ MATRIX_REGISTRATION_SHARED_SECRET }}

    message_handling_timeout:
        # Send an error message after this timeout, but keep waiting for the response until the deadline.
        # This is counted from the origin_server_ts, so the warning time is consistent regardless of the source of delay.
        # If the message is older than this when it reaches the bridge, the message won't be handled at all.
        error_after: 10s
        # Drop messages after this timeout. They may still go through if the message got sent to the servers.
        # This is counted from the time the bridge starts handling the message.
        deadline: 60s

    # The prefix for commands. Only required in non-management rooms.
    command_prefix: '!slack'
    # 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 Slack 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-token` or `login-password` to log in."
        # Optional extra text sent when joining a management room.
        additional_help: ""

    backfill:
        # Allow backfilling at all? Requires MSC2716 support on homeserver.
        enable: false

        # Maximum number of conversations to fetch from Slack when syncing team from Slack.
        # Must be 0-999
        conversations_count: 200

        # If a backfilled chat is older than this number of hours, mark it as read even if it's unread on Slack.
        # Set to -1 to let any chat be unread.
        unread_hours_threshold: 720

        # Number of messages to immediately backfill when creating a portal.
        immediate_messages: 10

        # Settings for incremental backfill of history.
        incremental:
            # Maximum number of messages to backfill per batch.
            messages_per_batch: 100
            # The number of seconds to wait after backfilling the batch of messages.
            post_batch_delay: 20
            # The maximum number of messages to backfill per portal, split by the chat type.
            # If set to -1, all messages in the chat will eventually be backfilled.
            max_messages:
                # Channels
                channel: -1
                # Group direct messages
                group_dm: -1
                # 1:1 direct messages
                dm: -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
        # 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/desktop-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

    # 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 Slack 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
        "{{ MATRIX_SERVER_NAME }}": user
        "@{{ MATRIX_ADMINISTRATOR_USERNAME }}:{{ MATRIX_SERVER_NAME }}": 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-slack.log
      max_size: 100
      max_backups: 10
      compress: true