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Low 35 Bitcoin

pset: allow sign_psbt to be called for liquid

Public commit record

What the developer wrote

Authored by Jamie C. Driver

70/100 · Adequate
pset: allow sign_psbt to be called for liquid

This initial commit just enables support with tests coming later.
✓ Descriptive subject✓ Names a concrete action or component✓ Provides an explanatory body✓ Mentions testing or verification
The short version

What changed, and why it matters

This commit enables the Jade hardware wallet to sign Liquid network transactions using the existing sign_psbt command. Previously, this command was rejected for Liquid. The change mainly removes that rejection, skips Bitcoin-only fee math on Liquid, and updates test fixtures. It is a feature-enablement patch rather than a clear security fix, and the commit message says full tests will follow later.

Recommended action

Treat this as a feature commit that needs security review of the full Liquid signing path before release. Verify that skipping input_amount on Liquid does not bypass fee checks elsewhere, that PSET parsing correctly handles Liquid-specific fields (issuances, re-issuances, explicit vs confidential values), and that the wrong-network-type check covers all PSBT/PSET version combinations. Wait for the follow-up tests promised in the commit message before relying on this code.

Security signals we found

01

Feature expansion: previously rejected Liquid PSBT signing path is now accepted

02

Bitcoin-only fee-accumulation logic is skipped for Elements/Liquid

03

No input validation or signing logic changes visible in the diff

04

Commit message notes tests are coming later, so coverage is incomplete

05

Test fixture for wrong network type confirms some mismatch checking remains

Risk score

Why this scored 35/100

Our methodology →
Potential impact 8/30
Exploitability 5/25
Stealth signal 5/15
Affected reach 7/15
Confidence 7/10
Evidence quality 3/5
Human-validated context

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