nick-doc/03 - API Reference/Trezor API.md

---
title: Trezor API
tags: [api, payments, trezor, safekeeping]
---

> **Last updated:** 2026-05-29 — aligned with code (see Doc vs Code Audit Report)

# Trezor API

The Trezor API is mounted at `/api/trezor`. It is optional support for hardware-backed safekeeping and does not replace Request Network checkout, the funds ledger, or the broader Safe/multisig custody roadmap.

Enforcement is controlled by:

```env
TREZOR_SAFEKEEPING_REQUIRED=false
```

Only the literal value `true` makes Trezor proof mandatory during release/refund confirmation. When unset or `false`, release/refund flows continue without Trezor proof.

## GET /api/trezor/registration-message

Builds the exact message the user must sign to register a Trezor xpub.

Auth: bearer JWT

Query:

```text
xpub=<extended public key>
registrationAddress=<first derived address>
```

Response:

```json
{
  "success": true,
  "data": {
    "message": "Amanat escrow Trezor registration\n..."
  }
}
```

## POST /api/trezor/register

Registers a Trezor xpub after the first derived address signs the registration challenge.

Auth: bearer JWT

Body:

```json
{
  "xpub": "xpub...",
  "registrationAddress": "0x...",
  "proofMessage": "Amanat escrow Trezor registration\n...",
  "proofSignature": "0x...",
  "basePath": "m/44'/60'/0'",
  "deviceLabel": "Office Trezor"
}
```

Validation:

- Rejects private extended keys (`xprv`, `tprv`).
- Requires `registrationAddress` to equal xpub-derived `m/44'/60'/0'/0/0`.
- Requires `proofSignature` to recover `registrationAddress`.

Response:

```json
{
  "success": true,
  "data": {
    "xpubFingerprint": "0x...",
    "registrationAddress": "0x...",
    "basePath": "m/44'/60'/0'",
    "nextAddressIndex": 1
  }
}
```

## GET /api/trezor/account

Returns the caller's active Trezor registration summary. If no Trezor has been registered for the authenticated user, returns `{ registered: false }` without an error.

Auth: bearer JWT

Response when registered:

```json
{
  "success": true,
  "data": {
    "registered": true,
    "xpubFingerprint": "0x...",
    "registrationAddress": "0x...",
    "basePath": "m/44'/60'/0'",
    "deviceLabel": "Office Trezor",
    "nextAddressIndex": 3
  }
}
```

Response when absent:

```json
{
  "success": true,
  "data": {
    "registered": false
  }
}
```

## POST /api/trezor/addresses/next

Allocates or returns a deterministic receive address from the registered xpub.

Auth: bearer JWT

Body:

```json
{
  "purpose": "deposit",
  "paymentId": "..."
}
```

If `paymentId` already has an assigned address, the same address is returned. Otherwise the backend derives:

```text
m/44'/60'/0'/0/{nextAddressIndex}
```

## POST /api/trezor/operation-message

Builds the exact transaction-intent message an admin must sign when Trezor safekeeping is enabled.

Auth: bearer JWT, admin

Body:

```json
{
  "operation": "release",
  "paymentId": "...",
  "transactionHash": "0x...",
  "amount": 100,
  "currency": "USDT",
  "provider": "request.network"
}
```

Response:

```json
{
  "success": true,
  "data": {
    "message": "Amanat escrow Trezor transaction approval\n..."
  }
}
```

## POST /api/trezor/verify-operation

Admin-only standalone signature verification endpoint. Verifies a signed operation intent against the admin's registered Trezor safekeeping address without performing any release or refund. Use this to validate a Trezor proof before submitting it to the release/refund flow.

Auth: bearer JWT, admin

Body:

```json
{
  "payload": {
    "operation": "release",
    "paymentId": "...",
    "transactionHash": "0x...",
    "amount": 100,
    "currency": "USDT",
    "provider": "request.network"
  },
  "message": "Amanat escrow Trezor transaction approval\n...",
  "signature": "0x..."
}
```

## Release / Refund Integration

When `TREZOR_SAFEKEEPING_REQUIRED=true`, release/refund confirmation bodies must include the Trezor proof:

```json
{
  "txHash": "0x...",
  "amount": 100,
  "trezor": {
    "message": "Amanat escrow Trezor transaction approval\n...",
    "signature": "0x..."
  }
}
```

This proof is optional when enforcement is disabled.