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Low 31 Bitcoin

refactor(core/ethereum): simplify calldata streaming flow

TZca9c3caf View source ↗
Public commit record

What the developer wrote

Authored by Roman Zeyde

85/100 · Strong
refactor(core/ethereum): simplify calldata streaming flow

There is no need for calling `confirm_tx_data` and then `confirm_data_and_summary`,
since we can do calldata streaming (while hashing and confirming) in `confirm_tx_data`.

[no changelog]
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides detailed explanatory context
The short version

What changed, and why it matters

This is a code cleanup (refactor) in Trezor's Ethereum transaction signing. It merges two internal steps into one so that transaction data is streamed, hashed, and shown to the user in a single pass instead of two. The commit message says there is no functional change, and the visible code preserves the same hashing and confirmation behavior. UI test snapshots changed, which is expected because the on-screen flow order changed, but no security bug is evident from the diff alone.

Recommended action

Treat as a routine refactor. If assessing for a security release, verify with the vendor that the UI snapshot changes are solely due to screen ordering and that no behavior change was intended for payment-request or blind-signing paths. No immediate patching action is indicated by the diff alone.

Security signals we found

01

Refactor of Ethereum transaction confirmation and hashing flow

02

Calldata hashing moved into a callback invoked during streaming

03

UI test fixture hashes updated for payment-request tests

04

No explicit security claim or changelog entry by vendor

Risk score

Why this scored 31/100

Our methodology →
Potential impact 5/30
Exploitability 5/25
Stealth signal 5/15
Affected reach 10/15
Confidence 4/10
Evidence quality 2/5
Human-validated context

Community notes

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