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 Signal 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:29328

    # The hostname and port where this appservice should listen.
    hostname: 0.0.0.0
    port: 29328

    # 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: signal
    # Appservice bot details.
    bot:
        # Username of the appservice bot.
        username: signalbot
        # Display name and avatar for bot. Set to "remove" to remove display name/avatar, leave empty
        # to leave display name/avatar as-is.
        displayname: Signal bridge bot
        avatar: mxc://maunium.net/wPJgTQbZOtpBFmDNkiNEMDUp

    # 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"

# Prometheus config.
metrics:
    # Enable prometheus metrics?
    enabled: false
    # IP and port where the metrics listener should be. The path is always /metrics
    listen: 127.0.0.1:8000

signal:
    # Default device name that shows up in the Signal app.
    device_name: mautrix-signal

# Bridge config
bridge:
    # Localpart template of MXIDs for Signal users.
    # {{.}} is replaced with the internal ID of the Signal user.
    username_template: signal_{{.}}
    # Displayname template for Signal users. This is also used as the room name in DMs if private_chat_portal_meta is enabled.
    # {{.ProfileName}} - The Signal profile name set by the user.
    # {{.ContactName}} - The name for the user from your phone's contact list. This is not safe on multi-user instances.
    # {{.PhoneNumber}} - The phone number of the user.
    # {{.UUID}} - The UUID of the Signal user.
    # {{.AboutEmoji}} - The emoji set by the user in their profile.
    displayname_template: '{{or .ProfileName .PhoneNumber "Unknown user"}}'
    # 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
    # Should avatars from the user's contact list be used? This is not safe on multi-user instances.
    use_contact_avatars: false
    # Should the bridge sync ghost user info even if profile fetching fails? This is not safe on multi-user instances.
    use_outdated_profiles: false
    # Should the Signal user's phone number be included in the room topic in private chat portal rooms?
    number_in_topic: true
    # Avatar image for the Note to Self room.
    note_to_self_avatar: mxc://maunium.net/REBIVrqjZwmaWpssCZpBlmlL

    portal_message_buffer: 128

    # Should the bridge create a space for each logged-in user and add bridged rooms to it?
    # Users who logged in before turning this on should run `!signal sync-space` to create and fill the space for the first time.
    personal_filtering_spaces: false
    # Should Matrix m.notice-type messages be bridged?
    bridge_notices: true
    # Should the bridge send a read receipt from the bridge bot when a message has been sent to Signal?
    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 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
    # Whether or not to make portals of groups that don't need approval of an admin to join by invite
    # link publicly joinable on Matrix.
    public_portals: false
    # Send captions in the same message as images. This will send data compatible with both MSC2530.
    # This is currently not supported in most clients.
    caption_in_message: false
    # Format for generating URLs from location messages for sending to Signal
    # Google Maps: 'https://www.google.com/maps/place/%[1]s,%[2]s'
    # OpenStreetMap: 'https://www.openstreetmap.org/?mlat=%[1]s&mlon=%[2]'
    location_format: 'https://www.google.com/maps/place/%[1]s,%[2]s'
    # Whether or not created rooms should have federation enabled.
    # If false, created portal rooms will never be federated.
    federate_rooms: true
    # 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
    # Allow users to provide the bridge with an access token to manage double puppeting manually.
    # Relevant for users on servers where automatic double puppeting has not been enabled.
    allow_manual_double_puppeting: true

    # Maximum time for handling Matrix events. Duration strings formatted for https://pkg.go.dev/time#ParseDuration
    # Null means there's no enforced timeout.
    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: null
        # 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: 120s

    # The prefix for commands. Only required in non-management rooms.
    command_prefix: '!signal'
    # 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 Signal 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: ""

    # 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 Signal 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
    # Should leaving the room on Matrix make the user leave on Signal?
    bridge_matrix_leave: true
    # 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 Signal 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

    # Settings for relay mode
    relay:
        # Whether relay mode should be allowed. If allowed, `!signal set-relay` can be used to turn any
        # authenticated user into a relaybot for that chat.
        enabled: false
        # Should only admins be allowed to set themselves as relay users?
        admin_only: true
        # The formats to use when sending messages to Signal via the relaybot.
        message_formats:
            m.text: "<b>{{ .Sender.Displayname }}</b>: {{ .Message }}"
            m.notice: "<b>{{ .Sender.Displayname }}</b>: {{ .Message }}"
            m.emote: "* <b>{{ .Sender.Displayname }}</b> {{ .Message }}"
            m.file: "<b>{{ .Sender.Displayname }}</b> sent a file"
            m.image: "<b>{{ .Sender.Displayname }}</b> sent an image"
            m.audio: "<b>{{ .Sender.Displayname }}</b> sent an audio file"
            m.video: "<b>{{ .Sender.Displayname }}</b> sent a video"
            m.location: "<b>{{ .Sender.Displayname }}</b> sent a location"

    # Limit usage of the bridge
    limits:
        # The maximum number of bridge puppets that can be "active" before the limit is reached
        max_puppet_limit: 0
        # The minimum amount of days a puppet must be active for before they are considered "active".
        min_puppet_activity_days: 0
        # The number of days after a puppets last activity where they are considered inactive again.
        puppet_inactivity_days: 30
        # Should the bridge block traffic when a limit has been reached
        block_on_limit_reached: true
        # The message sent to bridge admins when the bridges starts/stops being blocked
        block_begins_notification: 'The bridge is currently blocking messages. You may need to increase your usage limits in EMS.'
        block_ends_notification: 'The bridge is no longer blocking messages.'
        # The minimum interval between blocking notification being sent
        block_notification_interval_seconds: 3600

# 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-signal.log
      max_size: 100
      max_backups: 10
      compress: true