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Setting up Messenger bridging via Mautrix Meta (optional)

The playbook can install and configure the mautrix-meta Messenger/Instagram bridge for you.

Since this bridge component can bridge to both Messenger and Instagram and you may wish to do both at the same time, the playbook makes it available via 2 different Ansible roles (matrix-bridge-mautrix-meta-messenger and matrix-bridge-mautrix-meta-instagram). The latter is a reconfigured copy of the first one (created by just rebuild-mautrix-meta-instagram and bin/rebuild-mautrix-meta-instagram.sh).

This documentation page only deals with the bridge's ability to bridge to Facebook Messenger. For bridging to Instagram, see Setting up Instagram bridging via Mautrix Meta.

Migrating from the old mautrix-facebook bridge

If you've been using the mautrix-facebook bridge, it's possible to migrate the database using instructions from the bridge documentation (advanced).

Then you may wish to get rid of the Facebook bridge. To do so, send a clean-rooms command to the management room with the old bridge bot (@facebookbot:YOUR_DOMAIN).

This would give you a list of portals and groups of portals you may purge. Proceed with sending commands like clean recommended, etc.

Then, consider disabling the old bridge in your configuration, so it won't recreate the portals when you receive new messages.

Configuration

Most simply, you can enable the bridge with the following playbook configuration:

matrix_mautrix_meta_messenger_enabled: true

Before proceeding to re-running the playbook, you may wish to adjust the configuration further. See below.

Bridge mode

As mentioned above, the mautrix-meta bridge supports multiple modes of operation. The bridge can pull your Messenger messages via 3 different methods:

(facebook) Facebook via facebook.com
(facebook-tor) Facebook via facebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfyd.onion (Tor) - does not currently proxy media downloads
(default) (messenger) Messenger via messenger.com - usable even without a Facebook account

You may switch the mode via the matrix_mautrix_meta_messenger_meta_mode variable. The playbook defaults to the messenger mode, because it's most universal (every Facebook user has a Messenger account, but the opposite is not true).

Note that switching the mode (especially between facebook* and messenger) will intentionally make the bridge use another database (matrix_mautrix_meta_facebook or matrix_mautrix_meta_messenger) to isolate the 2 instances. Switching between Tor and non-Tor may be possible without dataloss, but your mileage may vary. Before switching to a new mode, you may wish to de-configure the old one (send help to the bridge bot and unbridge your portals, etc.).

Bridge permissions

By default, any user on your homeserver will be able to use the bridge.

Different levels of permission can be granted to users:

relay - Allowed to be relayed through the bridge, no access to commands
user - Use the bridge with puppeting
admin - Use and administer the bridge

The permissions are following the sequence: nothing < relay < user < admin.

The default permissions are set via matrix_mautrix_meta_messenger_bridge_permissions_default and are somewhat like this:

matrix_mautrix_meta_messenger_bridge_permissions_default:
  '*': relay
  YOUR_DOMAIN: user
  '{{ matrix_admin }}': admin

If you don't define the matrix_admin in your configuration (e.g. matrix_admin: @user:YOUR_DOMAIN), then there's no admin by default.

You may redefine matrix_mautrix_meta_messenger_bridge_permissions_default any way you see fit, or add extra permissions using matrix_mautrix_meta_messenger_bridge_permissions_custom like this:

matrix_mautrix_meta_messenger_bridge_permissions_custom:
  '@YOUR_USERNAME:YOUR_DOMAIN': admin

You may wish to look at roles/custom/matrix-bridge-mautrix-meta-messenger/templates/config.yaml.j2 to find more information on the permissions settings and other options you would like to configure.

Set up Double Puppeting

If you'd like to use Double Puppeting (hint: you most likely do), you have 2 ways of going about it.

Method 1: automatically, by enabling Shared Secret Auth

The bridge will automatically perform Double Puppeting if you enable Shared Secret Auth for this playbook.

This is the recommended way of setting up Double Puppeting, as it's easier to accomplish, works for all your users automatically, and has less of a chance of breaking in the future.

Method 2: manually, by asking each user to provide a working access token

Note: This method for enabling Double Puppeting can be configured only after you've already set up bridging (see Usage).

When using this method, each user that wishes to enable Double Puppeting needs to follow the following steps:

retrieve a Matrix access token for yourself. Refer to the documentation on how to do that.
send the access token to the bot. Example: login-matrix MATRIX_ACCESS_TOKEN_HERE
make sure you don't log out the session for which you obtained an access token some time in the future, as that would break the Double Puppeting feature

Usage

You then need to start a chat with @messengerbot:YOUR_DOMAIN (where YOUR_DOMAIN is your base domain, not the matrix. domain).

You then need to send a login command and follow the bridge bot's instructions.

Given that the bot is configured in messenger bridge mode by default, you will need to log in to messenger.com (not facebook.com!) and obtain the cookies from there as per the bridge's authentication instructions.

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