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Low 27 Monero

CW-1581-trezor-fixes-enhancements (#3462)

Public commit record

What the developer wrote

Authored by Konstantin Ullrich

76/100 · Adequate
CW-1581-trezor-fixes-enhancements (#3462)

* feat: add Trezor auto connect

* chore: update `trezor_flutter`

* fix: correct method name for retrieving Trezor auto-pairing credentials

* fix: update device connection prompt text across all languages [skip ci]

* feat: add Trezor key image synchronization ui and improve hardware wallet UX

* feat: add sync-balance icon asset for settings row visuals [skip ci]

* feat: add sync-balance icon asset for settings row visuals [skip ci]

* fix: remove unused Monero and sync key images settings actions from menus [skip ci]

* fix: re-enable routing for UR QR Animated Page [skip ci]
✓ Descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Links an issue, advisory, or supporting reference
The short version

What changed, and why it matters

This commit improves how Cake Wallet connects to Trezor hardware wallets and synchronizes Monero 'key images' (data that proves coins haven't already been spent). It adds automatic reconnection, a new user interface for syncing key images, and stores an encrypted Trezor pairing state on the device. The changes are mostly user-experience and reliability fixes rather than a clear security patch, though they touch on sensitive areas such as encrypted storage, hardware wallet pairing, and transaction signing flow.

Recommended action

Reviewers should verify that the encrypted Trezor state file cannot be downgraded or replayed, that auto-pairing credentials are validated before reuse, and that the new send-page routing does not bypass the existing needExportOutputs check. The trezor_flutter dependency bump should be audited for security-relevant changes, and the SecureStorage key handling should be checked for correct key rotation and deletion on wallet removal.

Security signals we found

01

New encrypted on-disk storage of Trezor pairing state (thp_state.json.enc) keyed by SecureStorage

02

Auto-pairing credential retrieval from TrezorClientV2 and persistence without explicit user confirmation

03

Changes to Monero transaction send flow routing based on hasUnknownKeyImages()

04

Dependency bump for trezor_flutter and trezor_usb_transport to a new git ref

05

Addition of async button wrapper that prevents re-entrant presses during pending futures

Risk score

Why this scored 27/100

Our methodology →
Potential impact 5/30
Exploitability 4/25
Stealth signal 3/15
Affected reach 6/15
Confidence 6/10
Evidence quality 3/5
Human-validated context

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