What the developer wrote
Authored by Craig Raw
fix trezor change detection on signing
What changed, and why it matters
This commit claims to fix how Sparrow Wallet detects 'change' outputs when signing transactions with a Trezor hardware wallet. Change outputs are coins sent back to the user's own wallet during a payment. If detection fails, the wallet or device might mislabel or mishandle those coins, which could confuse the user or in some designs affect how funds are verified. The actual code change is only one line in one file, but the diff was not provided, so we cannot verify what exactly was changed.
Obtain and review the actual diff for this commit before drawing any security conclusion. If the diff is unavailable, treat the commit as unverified. Users relying on Trezor with Sparrow should ensure they are on the latest release and verify change addresses on their device during signing.
Security signals we found
Hardware wallet integration (Trezor)
Transaction signing path
Change output handling
Single-line fix in a named module
Evidence from the diff
The commit title and message indicate a one-line fix in a file named ‘lark’ related to Trezor change detection during the signing flow. In Bitcoin wallets, change detection ensures that outputs returning funds to the wallet are recognized as owned by the user. Hardware wallets like Trezor rely on the host software to mark or prove which outputs are change. A bug here could cause the Trezor to display a change output as a regular payment, prompt the user incorrectly, or in some protocols fail to include the change proof. Without the diff we cannot assess the precise mechanism, scope, or correctness of the fix.
Changed components
Trezor signing integrationChange output detection logicFile/module named 'lark'Inspect captured patch +1 / −1
Diff not available from the source API.Why this scored 53/100
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