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# Discord Bridge Setup Guide
This guide will help you set up the Discord bridge for your Synapse Matrix server.
## Prerequisites
Before starting, ensure that:
- Synapse is properly configured and running.
- The `discord` database was created during the initial setup.
- You have your domain name ready.
## Setup Steps
1. Navigate to the Discord configuration directory:
```sh
cd config/mautrix-discord
```
2. Generate the initial configuration file:
```sh
docker run --rm -v `pwd`:/data:z dock.mau.dev/mautrix/discord
```
3. Edit the generated `config.yaml` file. You may need administrative privileges (sudo) to edit this file.
### Required Configuration Changes
Make the following modifications to your `config.yaml`:
#### Homeserver Settings
```yaml
homeserver:
address: http://monolith:8008 # Internal Docker network address
domain: your.domain.com # Replace with your actual domain
```
#### Appservice Settings
```yaml
appservice:
address: http://discord:29334 # Internal bridge address
hostname: 0.0.0.0 # Listen on all interfaces
```
#### Bridge Settings
```yaml
bridge:
permissions:
"*": relay
"your.domain.com": user # Replace with your domain
"@yourusername:your.domain.com": admin # Replace with your Matrix ID
```
#### Database Connection
Update the database URI to use the Discord-specific database:
```yaml
# Original:
# postgres://synapse:password@postgres/synapse?sslmode=disable
# Modified (note 'discord' database name):
postgres://synapse:password@postgres/discord?sslmode=disable
```
4. Generate the registration file:
```sh
docker run --rm -v `pwd`:/data:z dock.mau.dev/mautrix/discord
```
5. Configure Synapse to use the Discord bridge by editing `config/synapse/homeserver.yaml`:
```yaml
app_service_config_files:
- "/etc/discord/registration.yaml"
```
6. Start the bridge service:
```sh
docker compose up -d mautrix-discord
```
7. Restart Synapse to load the new bridge configuration:
```sh
docker compose restart monolith
```
## Verifying the Setup
Check if the bridge is running:
```sh
docker compose logs mautrix-discord
```
You should see messages indicating the bridge has started successfully. If the configuration files aren't present, the service will remain stopped - this is normal and prevents unnecessary restarts.
## Using the Bridge
1. Start a chat with `@discordbot:your.domain.com` in your Matrix client.
2. Follow the bot's instructions to:
- Set up a Discord bot account.
- Add the bot to your server.
- Link your Discord account.
## Double Puppeting
Double puppeting makes messages you send from Discord appear as coming from your Matrix account. To enable it:
1. You'll need the access token that was displayed when you created your Matrix user with the create-user.sh script.
2. Start a private chat with `@discordbot:your.domain.com`.
3. Send the command: `login-matrix <access-token>`.
(Replace `<access-token>` with your saved access token from create-user.sh).
4. The bot should confirm successful double puppeting setup.
Note: If you've lost your access token, you can generate a new one using Element or another Matrix client in Settings > Help & About > Access Token.
## Troubleshooting
1. **Bridge Not Starting**
- Verify that both config.yaml and registration.yaml exist.
- Check file permissions.
- Review logs with `docker compose logs mautrix-discord`.
2. **Bot Connection Issues**
- Verify bot token is correct.
- Check if all required intents are enabled.
- Ensure bot has proper permissions in Discord.
3. **Channel Bridging Issues**
- Verify bot has access to the channel.
- Check if the channel type is supported.
- Ensure proper permissions in both Discord and Matrix.
4. **Message Delivery Problems**
- Check bridge permissions in config.
- Verify room configuration.
- Ensure Discord connection is active.
## Next Steps
For more detailed information about bridge features and configuration options, visit the [mautrix-discord documentation](https://docs.mau.fi/bridges/general/docker-setup.html?bridge=discord).