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Informational 19 Bitcoin

BOLT12: Remove `start_any_period` from recurrence_base.

Public commit record

What the developer wrote

Authored by Rusty Russell

73/100 · Adequate
BOLT12: Remove `start_any_period` from recurrence_base.

Offer_absolute_expiry should be used if you want to require starting at the start.

Changelog-EXPERIMENTAL: Protocol: BOLT 12 recurrence `start_any_period` removed, use expiry if you need to restrict when they can start using the offer.
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context
The short version

What changed, and why it matters

This commit removes an experimental BOLT12 feature called `start_any_period` from Core Lightning's offer recurrence system. It is a protocol/API cleanup change, not a security patch. The functionality is replaced by the existing `absolute_expiry` mechanism for restricting when offers can be used. There is no direct evidence in the commit of a vulnerability being fixed.

Recommended action

No immediate security action required. Operators and integrators using BOLT12 offers should review the API change and migrate any use of `recurrence_start_any_period` to `absolute_expiry` before upgrading, as the removed field will no longer be accepted.

Security signals we found

01

Experimental BOLT12 protocol feature removal

02

API/schema field deprecation without security framing

03

Changelog describes protocol change, not security fix

Risk score

Why this scored 19/100

Our methodology →
Potential impact 2/30
Exploitability 1/25
Stealth signal 1/15
Affected reach 3/15
Confidence 8/10
Evidence quality 4/5
Human-validated context

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