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Low 34 Bitcoin

msggen: new rust types for `sat` and `sat_or_all`

Public commit record

What the developer wrote

Authored by daywalker90

68/100 · Adequate
msggen: new rust types for `sat` and `sat_or_all`

Also stop serializing amounts as string with msat suffix in cln-rpc
and serialize them as a raw number instead, like CLN does it

Changelog-None
✓ Descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context
The short version

What changed, and why it matters

This commit changes how the Core Lightning (CLN) Rust RPC and gRPC libraries represent and serialize amounts. It introduces separate types for satoshi-denominated amounts (AmountSat) versus millisatoshi-denominated amounts (Amount), and changes serialization from strings like "10000msat" to raw numbers like 10000. This is a breaking API and wire-format change for generated Rust/gRPC clients, but it is intentional cleanup rather than a clear security fix. There is no vendor statement that this resolves a security issue, and no independent researcher is credited.

Recommended action

Treat as a compatibility/API change, not a security patch. Downstream users of cln-rpc and cln-grpc should verify that amount parsing/serialization still interoperates with their CLN node version, especially where amounts were previously expected as strings like "10000msat". If this commit is part of a release, review release notes for any additional migration guidance.

Security signals we found

01

Breaking serialization change: amount fields now emitted as raw u64 instead of suffixed strings

02

New AmountSat/AmountSatOrAll types separate sat and msat units

03

Generated gRPC proto types updated for sat-denominated fields

04

No mention of vulnerability, CVE, or security fix in commit message or changelog

Risk score

Why this scored 34/100

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

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