Philosophy
A hardware wallet's safety comes from isolation. The bridge preserves that isolation while allowing the essential, auditable operations:
- Enumerate devices
- Request public keys and addresses
- Request signatures for transactions
- Verify firmware images before update
Each of these operations is human-surveilled: the device displays the relevant details and asks for explicit confirmation.
A short narrative
Imagine you are signing a Bitcoin transaction. The web app prepares the transaction; the bridge hands it to the device. The device shows the outputs and amounts. You approve on the device. Your signature returns. At no point does the bridge reveal private keys or autonomously sign anything without the device's explicit user approval.
Operational hygiene
Use these habits: check firmware signatures; avoid unknown builds; uninstall orphaned or legacy installations; use the official Trezor channels for downloads and verification. Treat the bridge as a small, trusted proxy—not a general-purpose daemon.
Developer notes
For integrators, the bridge provides a compact API surface. Use strict input validation, present human-friendly summaries to users, and log minimal operational metadata for debugging without including secret material in logs.