The v0.20.2-beta tag was cut on 2026-07-07 and published as a release
the following day, but the seven backports that landed on the release
branch afterwards all appended their entries to
release-notes-0.20.2.md, since no notes file existed for the next
patch release. The published 0.20.2 notes therefore advertised fixes
that are not in the 0.20.2 binaries.
Create release-notes-0.20.3.md and move those entries into it,
restoring release-notes-0.20.2.md to its content at the v0.20.2-beta
tag. The entry prose is carried over verbatim and matches the wording
already used for the same backports in release-notes-0.21.2.md on the
v0.21.x branch.
In this commit, we cap each QueryChannelRange response at 100,000 SCIDs
across all streamed replies. The existing reply-count limit did not track
the aggregate decoded working set, so memory use varied with the encoding
and composition of the reply stream.
We count raw SCIDs before timestamp filtering, charge replies using the
received encoding type, and release all accumulated range state on any
error. This bounds both memory and CPU work while still leaving headroom
above the current graph.
(cherry picked from commit ceff94fadd)
This commit fixes a backwards compatibility issue that prevented nodes
from upgrading from v0.19.x to v0.20.x.
In v0.19.x, channel edge features were serialized as raw feature bytes
without a length prefix. In v0.20.x (commit 2f2845dfc), the serialization
changed to use Features.Encode() which adds a 2-byte big-endian length
prefix before the feature bits. The deserialization code was updated to
use Features.Decode() which expects this length prefix.
When v0.20.x reads a database created by v0.19.x, Decode() tries to read
a length prefix that doesn't exist, causing an EOF error:
unable to decode features: EOF
The fix adds a deserializeChanEdgeFeatures() helper that detects which
format is being read and decodes accordingly:
- New format (v0.20+): First 2 bytes encode the length of the remaining
bytes. Detected when uint16(bytes[0:2]) == len(bytes)-2.
- Legacy format (pre-v0.20): Raw feature bits without length prefix.
Uses DecodeBase256 with the known length.
The format detection is safe because in the legacy format, the first byte
always has at least one bit set (the serialization uses minimum bytes),
so the first two bytes can never encode a value equal to len-2.
Fixes#10528.
(cherry picked from commit 56a7f45b99)
In this commit, we add validation for channel updates and node
announcements to ensure that we reject gossip messages with zero
timestamps at the discovery layer.
From BOLT 7:
"MUST set timestamp to greater than 0, AND to greater than any
previously-sent channel_update for this short_channel_id."
This validation is performed in the gossip handlers (handleNodeAnnouncement
and handleChanUpdate) rather than at the wire protocol level. This approach
ensures we can still decode messages from disk or embedded in onion errors
while rejecting invalid gossip from peers.
Remote peers sending zero-timestamp gossip will have their ban score
incremented.
(cherry picked from commit cad1b957bf)
