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

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# Setting up Mautrix Signal (optional)
The playbook can install and configure [mautrix-signal](https://github.com/tulir/mautrix-signal) for you.
See the project's [documentation](https://github.com/tulir/mautrix-signal/wiki) to learn what it does and why it might be useful to you.
Use the following playbook configuration:
```yaml
matrix_mautrix_signal_enabled: true
```
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To specify which users have access to the bridge, use the variable `matrix_mautrix_signal_configuration_permissions`.
Refer to the documentation for
```yaml
bridge:
permissions:
```
in [the example config in mautrix-signal](https://github.com/tulir/mautrix-signal/blob/master/mautrix_signal/example-config.yaml).
For instance, use
```yaml
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matrix_mautrix_signal_configuration_permissions: |
{
'{{ matrix_domain }}': 'user'
}
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```
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to allow all users registered to the current host's matrix domain access to the bridge, or hard-code whatever you like.
(See [this issue](https://github.com/ansible/ansible/issues/17324#issuecomment-449642731) on how to use variable names as dictionary keys.)
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## Set up Double Puppeting
If you'd like to use [Double Puppeting](https://github.com/tulir/mautrix-whatsapp/wiki/Authentication#replacing-whatsapp-accounts-matrix-puppet-with-matrix-account) (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](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. You can use the following command:
```
curl \
--data '{"identifier": {"type": "m.id.user", "user": "YOUR_MATRIX_USERNAME" }, "password": "YOUR_MATRIX_PASSWORD", "type": "m.login.password", "device_id": "Mautrix-Signal", "initial_device_display_name": "Mautrix-Signal"}' \
https://matrix.DOMAIN/_matrix/client/r0/login
```
- 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).