matrix-docker-ansible-deploy/docs/configuring-playbook-bridge-mautrix-signal.md

Setting up Mautrix Signal (optional)

The playbook can install and configure mautrix-signal for you.

See the project's documentation to learn what it does and why it might be useful to you.

Note/Prerequisite: If you're running with the Postgres database server integrated by the playbook (which is the default), you don't need to do anything special and can easily proceed with installing. However, if you're using an external Postgres server, you'd need to manually prepare a Postgres database for this bridge and adjust the variables related to that (matrix_mautrix_signal_database_*).

Note: This revamped version of the mautrix-signal (legacy) may increase the CPU usage of your homeserver.

Use the following playbook configuration:

matrix_mautrix_signal_enabled: true

There are some additional things you may wish to configure about the bridge before you continue.

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 as follows:

permissions:
  '*': relay
  YOUR_DOMAIN: user

If you want to augment the preset permissions, you might want to set the additional permissions with the following settings in your vars.yml file:

matrix_mautrix_signal_configuration_extension_yaml: |
  bridge:
    permissions:
      '@YOUR_USERNAME:YOUR_DOMAIN': admin  

This will add the admin permission to the specific user, while keeping the default permissions.

In case you want to replace the default permissions settings completely, populate the following item within your vars.yml file:

matrix_mautrix_signal_bridge_permissions:
  '@ADMIN:YOUR_DOMAIN': admin
  '@USER:YOUR_DOMAIN' : user

You may wish to look at roles/custom/matrix-bridge-mautrix-signal/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 Mautrix-Signal device some time in the future, as that would break the Double Puppeting feature

Usage

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