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

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# Setting up Mautrix Signal (optional)
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The playbook can install and configure [mautrix-signal](https://github.com/mautrix/signal) for you.
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See the project's [documentation](https://docs.mau.fi/bridges/python/signal/index.html) to learn what it does and why it might be useful to you.
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**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](configuring-playbook-external-postgres.md), 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)](configuring-playbook-bridge-mautrix-signal.md) may increase the CPU usage of your homeserver.
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Use the following playbook configuration:
```yaml
matrix_mautrix_signal_enabled: true
```
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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.
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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:
```yaml
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:
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```yaml
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:
```yaml
matrix_mautrix_signal_bridge_permissions:
'@ADMIN:YOUR_DOMAIN': admin
'@USER:YOUR_DOMAIN' : user
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```
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.
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## Set up Double Puppeting
If you'd like to use [Double Puppeting](https://docs.mau.fi/bridges/general/double-puppeting.html) (hint: you most likely do), you have 2 ways of going about it.
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### Method 1: automatically, by enabling Shared Secret Auth
The bridge will automatically perform Double Puppeting if you enable [Shared Secret Auth](configuring-playbook-shared-secret-auth.md) 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](#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](obtaining-access-tokens.md).
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- send the access token to the bot. Example: `login-matrix MATRIX_ACCESS_TOKEN_HERE`
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- make sure you don't log out the `Mautrix-Signal` device some time in the future, as that would break the Double Puppeting feature
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## Usage
You then need to start a chat with `@signalbot:YOUR_DOMAIN` (where `YOUR_DOMAIN` is your base domain, not the `matrix.` domain).