Trezor Bridge Advanced Configuration & Developer Setup

1. Introduction

While most users install Trezor Bridge from official binaries, advanced developers can compile, configure, and extend Bridge to suit custom security or enterprise environments. This page details the setup and build process for local testing or integration into self-hosted applications.

2. Requirements

• Go (v1.19+)
• Git
• USB HID permissions (Linux/macOS)
• Optional: Docker, Node.js (for integration testing)

3. Clone and Build the Project

# Clone official repo
git clone https://github.com/trezor/trezord-go.git
cd trezord-go

# Build
go build -o trezord main.go

# Verify
./trezord -v

4. Running Trezor Bridge Locally

By default, Bridge listens on 127.0.0.1:21325. You can modify this or run in debug mode:

# Run in background
./trezord &

# Debug logs
./trezord -debug -loglevel=trace

To make the Bridge available over LAN (not recommended for production):

./trezord -host=0.0.0.0 -public

5. Environment Variables

Bridge supports environment variables for customization:

BRIDGE_PORT=21325
BRIDGE_LOG=trace
BRIDGE_ALLOW_ORIGINS=chrome-extension://*,https://suite.trezor.io
BRIDGE_AUTO_RESTART=true

Save these in a .env file or system config. Restart Bridge to apply changes.

6. Integration with Trezor Suite

Developers can test integration with Trezor Suite desktop or web versions. Enable developer mode in Suite → Settings → Device → Developer Tools.

Then check Bridge connection status via:

http://127.0.0.1:21325/status/

If you’re embedding Suite Web into your app, use Trezor Connect JavaScript SDK for cross-browser communication.

7. Logging & Debugging

Bridge outputs detailed logs at trace level:

./trezord -loglevel=debug | tee bridge.log

Common entries include handshake data, device enumeration, and USB state transitions. For deep diagnostics, inspect logs using:

grep "device" bridge.log

8. Docker Deployment (Optional)

Bridge can be containerized for CI or testing:

# Build Docker image
docker build -t trezord-local .

# Run container
docker run -d -p 21325:21325 --name trezor-bridge trezord-local

Mount volumes for persistent logs or configs:

docker run -v /logs:/app/logs trezord-local

9. Custom Builds & Patches

Advanced teams may patch the Bridge for audit environments. Modify Go source files such as usb.go or server.go to change permissions, whitelist origins, or log formats.

Always ensure modified builds are signed and verified. Custom binaries must never be redistributed as “official” releases.

10. Security & Maintenance

Follow Trezor’s developer wiki for signed binary policies. Keep your local builds updated with upstream commits:

git pull origin master
go build -o trezord main.go

Periodically check the changelog at trezor.io/bridge for new releases or critical fixes.

Conclusion

Developers can fully customize and extend Trezor Bridge to suit secure systems, enterprise wallets, and privacy-first environments. By mastering its configuration and internal structure, you ensure seamless communication between crypto hardware and software, maintaining both flexibility and security.