Every captured commit receives deterministic security triage and a separate communication-quality score. Security candidates and broader second-pass signals receive full-patch Ollama analysis.
Message quality measures whether a commit identifies its scope, purpose, rationale, testing, and supporting references. It does not change the security-severity score.
This commit makes on-chain 'MonitorEvent' notifications durable and replay-safe. Previously, if a node crashed after a ChannelMonitor persisted a block update but before the ChannelManager processed the resulting event, the event could be …
Durability/atomicity fix for async persistence: prevents lost MonitorEvents across crashesNew ack-based event lifecycle with random event IDsArchival gating on unacknowledged events to avoid losing preimage/timeout information
This commit refactors how LDK nodes claim incoming Lightning payments. It replaces a separate 'claim with known custom TLVs' method with an options struct passed to the normal claim call, and fixes two edge cases in payment attribution dat…
API change: claim_funds now takes ClaimFundsOptions, consolidating TLV-known behavior into one pathFailure-packet length bound added to prevent oversized onion error messagesIncoming failure packet truncated at 32 KiB before processing
This change fixes a wallet bookkeeping problem in rust-lightning's built-in coin-selection wrappers. Previously, when a splice attempt failed or coin selection errored after picking UTXOs, those UTXOs stayed marked as 'reserved' in memory …
Resource exhaustion / denial-of-service via permanent in-memory UTXO reservationIncorrect state tracking in coin-selection wrapperNew API method required for correct lifecycle management (release_utxos)
This commit fixes a bug in the wallet's coin-selection code. When the wallet picked UTXOs to spend, it locked them immediately so they couldn't be reused. But if a later step—fetching the change address or the previous transaction—failed, …
Resource lock leak on error pathUTXO lock state inconsistency between selection and confirmationDenial-of-service/funds-unavailability risk from persistent UTXO locks
This commit rewrites how a Lightning wallet talks to Esplora block-explorer servers so that many status checks happen in parallel instead of one at a time. It is a performance/refactoring change. There is no direct evidence in the commit t…
Concurrency/timing change in transaction confirmation logicNew inconsistency check preserved when a previously-confirmed tx is reported unconfirmedAdded defensive error path for missing pre-fetched block status
This change stops the Electrum-based transaction sync client from downloading the very transaction that created an output it is watching. Previously, the client could request that transaction from Electrum, even though a transaction can ne…
Avoids unnecessary Electrum transaction.get requests for watched outputsReduces information disclosure to Electrum server about watched outpointsAdds regression test verifying request suppression
This change improves how the Lightning Dev Kit's Electrum and Esplora transaction-sync clients track watched Bitcoin transactions. Previously, the code ignored the script pubkey (the 'address' associated with a transaction) supplied when r…
Previously ignored `script_pubkey` argument in `register_tx` for transaction watchersElectrum script-history queries previously used an arbitrary transaction output, which could be OP_RETURN and therefore unindexed by some Electrum serversNew logic prefers caller-supplied script pubkey and falls back to non-OP_RETURN outputs
This commit changes how LDK stores pending event notifications. It adds serialization support for several event types that previously were not fully saved to disk, and introduces a helper method so the code can decide which events are wort…
Data-loss prevention: previously non-round-trippable event variants are now fully serialized, avoiding accidental event loss when users serialize Event queues themselvesState-consistency hardening: ChannelManager now explicitly skips events that describe non-surviving restart state, preventing replay of stale eventsDefensive assertion: debug builds assert that every persisted event round-trips to Some(event), catching serialization mismatches
This commit only adds documentation comments to two source files. It explains that certain funding-signing events can become stale if the underlying negotiation fails, and that callers may see specific harmless errors as a result. No code …
This commit fixes a design flaw in LDK's built-in wallet helper where coins selected for a splice-in (or other unclaimed funding) were permanently reserved in memory if the transaction was abandoned. Over repeated failed splices, all spend…
Denial-of-service via UTXO exhaustion from repeated failed splice negotiationsRisk of inability to broadcast fee-bumping/claim transactions due to lack of available UTXOsNew API surface (release_utxos) introduced to mitigate resource leak
This commit removes a fixed-version pin for the honggfuzz fuzzing tool in a continuous-integration script. The project now uses the current release of honggfuzz instead of an older pinned version. There is no change to the actual Lightning…
This commit changes the Rust toolchain used in the continuous integration (CI) fuzzing job from a fixed older version (1.75) to the latest stable release. It is purely a build/test infrastructure change to fix a dependency compatibility is…
This commit makes a previously internal helper function public so that outside developers can build dummy-hop tails for blinded payment paths without recreating the logic themselves. It is an API usability change, not a fix for a known sec…
No security-relevant behavior change in the diffAPI visibility broadened from crate-public to publicCLTV expiry overflow check already present and unchanged
This change adds a safety check in a Bitcoin Lightning Network library (LDK). Previously, if the software tried to verify a peer's commitment signature before it had learned the peer's channel parameters, it could crash with a panic. Now i…
Defensive check added on peer-driven code path to prevent panicMissing counterparty_parameters could previously cause panic during commitment transaction constructionChannel closure returned instead of panic
This commit only changes the wording of an error message sent to peers when a commitment transaction fails validation. It replaces the vague phrase 'Failed to validate our commitment' with the clearer 'Received commitment failed validation…
This commit moves the checks that validate a counterparty's signatures on the holder's commitment and HTLC transactions out of the general channel code and into the signer module (InMemorySigner). Previously, these signature checks were do…
Moved signature validation from channel state machine into signer moduleAdded new tests that corrupt signatures and verify rejectionChanged error message from 'Invalid commitment tx signature from peer' / 'Invalid funding_created signature from peer' to 'Failed to validate our commitment'
This change fixes a Lightning channel splicing bug: when two peers temporarily disconnect during a splice, any half-finished signature the other side already sent is now discarded. Before the fix, that stale signature could be reused after…
State-invalidation bug in multi-step protocol (splice negotiation)Stale cryptographic signature not cleared on disconnectPotential reuse of old commitment state after reconnect
This fix prevents a Lightning channel from being accidentally force-closed. During a splice (a way to resize a payment channel), one side's initial signature could be kept in memory after the peers disconnected. If the peers later reconnec…
State inconsistency: in-memory buffered message not cleared on disconnectDuplicate message processing after reconnectionForce-close consequence for active Lightning channel
This commit is a simple rename of a public function from `matches_invoice_signing_pubkey` to `key_can_sign_invoice`, plus matching updates to its documentation, callers, tests, and changelog. No behavior changed. It is not a security fix.
This commit is a simple rename of a function and its documentation from matches_invoice_signing_pubkey to key_can_sign_invoice. No logic, behavior, or security properties changed. It is a follow-up code-review naming cleanup.
Expand any commit for its author, full message, clarity score, changed files, triage signals, analysis, and source link.
Lower-priorityln/test: add test coverage for accountable signal propagationby Carla Kirk-Cohen · 351bd3ce · Jan 9, 2026 · 2 filesMessage 60 · AdequateInformational 12Details
Commit message · Carla Kirk-Cohen
ln/test: add test coverage for accountable signal propagation
60/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Mentions testing or verification! No meaningful explanatory body
AI analysis · Informational 12/100
This commit only adds new test code to verify how an existing 'accountable' flag is forwarded between Lightning nodes. It does not change production logic, so it cannot introduce a new security vulnerability by itself. The tests check that the flag is correctly propagated (or not propagated) across a three-node payment path.
Remove unnecessary update_add clone on Channel ser
50/100 · ThinMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component! No meaningful explanatory body
AI analysis · Informational 15/100
This is a small code cleanup that removes an unnecessary clone (duplicate copy) of update_add data when serializing a Lightning channel to bytes. It changes the vector to hold references instead of owned copies, with no functional change to behavior or security.
Lower-priorityln: add accountable signal to OutboundHTLCOutputby Carla Kirk-Cohen · d3b58e3b · Jan 8, 2026 · 1 fileMessage 45 · ThinLow 27Details
Commit message · Carla Kirk-Cohen
ln: add accountable signal to OutboundHTLCOutput
45/100 · ThinMessage clarity
✓ Descriptive subject✓ Names a concrete action or component! No meaningful explanatory body
AI analysis · Low 27/100
This commit adds a new boolean flag called 'accountable' to outbound payment records (HTLCs) in a Lightning Network implementation. It ensures the flag is saved to disk and restored correctly when the node restarts. The change appears to be a data-model fix to support tracking which payments should be held financially accountable, likely as part of a larger feature. There is no direct evidence in the commit that this fixes an active security vulnerability, but incomplete state serialization can lead to incorrect behavior after a restart.
Lower-priorityln: add accountable signal to HTLCUpdateAwaitingACK::AddHTLCby Carla Kirk-Cohen · d084a9da · Jan 8, 2026 · 2 filesMessage 50 · ThinLow 45Details
Commit message · Carla Kirk-Cohen
ln: add accountable signal to HTLCUpdateAwaitingACK::AddHTLC
50/100 · ThinMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component! No meaningful explanatory body
AI analysis · Low 45/100
This commit adds a new 'accountable' flag to forwarded Lightning payments that is preserved when an HTLC is queued in a channel's holding cell. The flag appears intended to track whether a downstream node can be held financially responsible if a forwarded payment fails after the upstream side has already been settled. The change itself is a data plumbing patch; it does not contain an obvious active vulnerability, but it is part of a larger accountability mechanism whose security implications depend on how the flag is consumed elsewhere.
Lower-priorityln: add incoming_accountable to PendingHTLCInfoby Carla Kirk-Cohen · 413aa95c · Jan 8, 2026 · 2 filesMessage 80 · StrongLow 26Details
Commit message · Carla Kirk-Cohen
ln: add incoming_accountable to PendingHTLCInfo
Persist as a bool so that we don't need to use Option<bool> when we will just inevitably unwrap_or(false) the field. This means that we won't be able to distinguish between an incoming htlc that has no TLV set, and one that has the TLV set with a false value in it. We accept this loss of information for the sake of simplicity in the codebase.
80/100 · StrongMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Explains rationale or failure mode
AI analysis · Low 26/100
This commit adds a new boolean flag called incoming_accountable to an internal data structure (PendingHTLCInfo) used when routing Lightning payments. The flag records whether the node is expected to be 'accountable' for resolving an incoming payment on time. It is read from an optional TLV field in the incoming message and defaults to false when not present. The change is a straightforward plumbing/data-model update; it does not by itself fix or introduce a security flaw, but it is part of work that could affect how reputation and payment-timeout penalties are tracked in the future.
Lower-priorityln: add experimental accountable signal to update_add_htlcby Carla Kirk-Cohen · 46aa1cf8 · Jan 8, 2026 · 7 filesMessage 50 · ThinInformational 18Details
Commit message · Carla Kirk-Cohen
ln: add experimental accountable signal to update_add_htlc
50/100 · ThinMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component! No meaningful explanatory body
AI analysis · Informational 18/100
This commit adds a new experimental flag called 'accountable' to the Lightning update_add_htlc message. The flag is purely informational right now: it is sent and received, but the code does not use it to make any forwarding or security decisions. It is marked experimental and is not treated as authoritative. There is no obvious security vulnerability in the change itself.
Lower-priorityutil: add support for option with custom encodingby Carla Kirk-Cohen · b858b444 · Jan 8, 2026 · 1 fileMessage 45 · ThinInformational 17Details
Commit message · Carla Kirk-Cohen
util: add support for option with custom encoding
45/100 · ThinMessage clarity
✓ Descriptive subject✓ Names a concrete action or component! No meaningful explanatory body
AI analysis · Informational 17/100
This commit adds a missing macro rule in a Rust serialization helper so that optional fields can use a custom byte encoding. It is a feature addition with a regression test; there is no indication it fixes a security vulnerability.
Lower-priorityParallelize `ChannelMonitorUpdate` loadingby Matt Corallo · 6ef22bab · Jan 8, 2026 · 1 fileMessage 58 · ThinInformational 15Details
Commit message · Matt Corallo
Parallelize `ChannelMonitorUpdate` loading
When reading `ChannelMonitor`s from a `MonitorUpdatingPersister` on startup, we have to make sure to load any `ChannelMonitorUpdate`s and re-apply them as well. Now that we know which `ChannelMonitorUpdate`s to load from `list`ing the entries from the `KVStore` we can parallelize the reads themselves, which we do here.
Now, loading all `ChannelMonitor`s from an async `KVStore` requires only three full RTTs - one to list the set of `ChannelMonitor`s, one to both fetch the `ChanelMonitor` and list the set of `ChannelMonitorUpdate`s, and one to fetch all the `ChannelMonitorUpdate`s (with the last one skipped when there are no `ChannelMonitorUpdate`s to read).
This commit is a performance optimization, not a security fix. It changes how Lightning node data is loaded from storage when the program starts up. Previously, certain update records were read one at a time; now they are read in parallel. The commit message and code changes only describe speed improvements and reducing network round trips. There is no indication of a vulnerability being fixed.
AI review queuedAdd an option to deserialize monitors in parallel in async loadby Matt Corallo · 18f7a8f5 · Jan 8, 2026 · 1 fileMessage 85 · StrongInformational 15Details
Commit message · Matt Corallo
Add an option to deserialize monitors in parallel in async load
`MonitorUpdatingPersister::read_all_channel_monitors_with_updates` was made to do the IO operations in parallel in a previous commit, however in practice this doesn't provide material parallelism for large routing nodes. Because deserializing `ChannelMonitor`s is the bulk of the work (when IO operations are sufficiently fast), we end up blocked in single-threaded work nearly the entire time.
Here, we add an alternative option - a new `read_all_channel_monitors_with_updates_parallel` method which uses the `FutureSpawner` to cause the deserialization operations to proceed in parallel.
85/100 · StrongMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Explains rationale or failure mode
Why it was queued
second-pass: broader security terminology
AI analysis · Informational 15/100
This commit adds a new optional method that lets a Lightning node read its saved channel monitors in parallel, including the CPU-heavy step of turning stored data back into usable objects. It is a performance improvement, not a security fix. The existing single-threaded method remains available and unchanged in behavior.
Lower-priorityAvoid a storage RTT when loading `ChannelMonitor`s without updatesby Matt Corallo · 7471d05d · Jan 8, 2026 · 2 filesMessage 85 · StrongInformational 23Details
Commit message · Matt Corallo
Avoid a storage RTT when loading `ChannelMonitor`s without updates
When reading `ChannelMonitor`s from a `MonitorUpdatingPersister` on startup, we have to make sure to load any `ChannelMonitorUpdate`s and re-apply them as well. For users of async persistence who don't have any `ChannelMonitorUpdate`s (e.g. because they set `maximum_pending_updates` to 0 or, in the future, we avoid persisting updates for small `ChannelMonitor`s), this means two round-trips to the storage backend, one to load the `ChannelMonitor` and one to try to read the next `ChannelMonitorUpdate` only to have it fail.
Instead, here, we use `KVStore::list` to fetch the list of stored `ChannelMonitorUpdate`s, which for async `KVStore` users allows us to parallelize the list of update fetching and the `ChannelMonitor` loading itself. Then we know exactly when to stop reading `ChannelMonitorUpdate`s, including reading none if there are none to read. This also avoids relying on `KVStore::read` correctly returning `NotFound` in order to correctly discover when to stop reading `ChannelMonitorUpdate`s.
85/100 · StrongMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Explains rationale or failure mode
AI analysis · Informational 23/100
This commit is a performance and robustness improvement, not a fix for an active security bug. It changes how Lightning channel monitor data is loaded on startup so that the code lists available update files first, rather than repeatedly trying to read update files until it gets a 'not found' error. This removes one round-trip to storage for users with no pending updates and makes the loader no longer depend on storage backends correctly returning a specific 'not found' error. The old behavior could, in theory, cause a node to fail to start or misload state if a storage backend returned the wrong error kind, but the commit itself does not describe any such failure being exploited.
Lower-priorityAllow `FutureSpawner` to return the result of the spawned futureby Matt Corallo · b4eab2c7 · Jan 8, 2026 · 3 filesMessage 73 · AdequateInformational 18Details
Commit message · Matt Corallo
Allow `FutureSpawner` to return the result of the spawned future
`tokio::spawn` can be use both to spawn a forever-running background task or to spawn a task which gets `poll`ed independently and eventually returns a result which the callsite wants.
In LDK, we have only ever needed the first, and thus didn't bother defining a return type for `FutureSpawner::spawn`. However, in the next commit we'll start using `FutureSpawner` in a context where we actually do want the spawned future's result. Thus, here, we add a result output to `FutureSpawner::spawn`, mirroring the `tokio::spawn` API.
73/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context
AI analysis · Informational 18/100
This commit is a routine internal API change. It updates the FutureSpawner trait so that spawning a background future can return the future's result, similar to tokio::spawn. It does not fix a security bug and does not introduce obvious security flaws; it is preparation for a later feature.
Lower-priorityParallelize `ChannelMonitor` loading from async `KVStore`sby Matt Corallo · 5fbbd41d · Jan 8, 2026 · 2 filesMessage 85 · StrongInformational 11Details
Commit message · Matt Corallo
Parallelize `ChannelMonitor` loading from async `KVStore`s
Reading `ChannelMonitor`s on startup is one of the slowest parts of LDK initialization. Now that we have an async `KVStore`, there's no need for that, we can simply paralellize their loading, which we do here.
Sadly, because Rust futures are pretty unergonomic, we have to add some `unsafe {}` here, but arguing its fine is relatively straightforward.
85/100 · StrongMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Explains rationale or failure mode
AI analysis · Informational 11/100
This commit is a performance improvement, not a security fix. It changes how Lightning Dev Kit loads saved channel data on startup so that multiple pieces can be read at the same time rather than one after another. The change introduces a small amount of `unsafe` Rust code, but the included safety comment explains why the authors believe it is correct. There is no indication in the commit that this fixes a vulnerability or that it creates one.
Lower-priorityMake test hash map iteration order configurable for deterministic runsby Joost Jager · 075bc349 · Jan 8, 2026 · 2 filesMessage 96 · StrongInformational 15Details
Commit message · Joost Jager
Make test hash map iteration order configurable for deterministic runs
Add a `RandomState` hasher implementation for tests that supports deterministic behavior via the `LDK_TEST_DETERMINISTIC_HASHES=1` environment variable. When set, hash maps use fixed keys ensuring consistent iteration order across test runs.
By default, tests continue to use std's RandomState for random hashing, keeping test behavior close to production.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
96/100 · StrongMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Mentions testing or verification✓ Links an issue, advisory, or supporting reference✓ Names security-relevant behavior explicitly
AI analysis · Informational 15/100
This commit adds a test-only option to make hash map iteration order deterministic. It does not change production code and has no security relevance. It is purely a testing convenience for comparing test logs across runs.
Lower-priorityMake test block connect style configurable for deterministic runsby Joost Jager · 5b211158 · Jan 8, 2026 · 2 filesMessage 88 · StrongInformational 15Details
Commit message · Joost Jager
Make test block connect style configurable for deterministic runs
Tests previously selected a random block connect style to improve coverage. However, this randomness made test output non-deterministic and significantly cluttered diffs when comparing logs before and after changes.
To address this, an LDK_TEST_CONNECT_STYLE environment variable is added to override the random selection and enable deterministic test runs.
Note that broader coverage may be better achieved via targeted tests per connect style or a test matrix cycling through all styles, but this change focuses on improving reproducibility and debuggability.
88/100 · StrongMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Mentions testing or verification✓ Names security-relevant behavior explicitly
AI analysis · Informational 15/100
This change only affects internal test code. It adds an environment variable so developers can choose a fixed block-connect style during testing instead of having one picked at random. There is no production code change and no security impact.
Extract error message strings into local variables before constructing ChannelError return tuples, reducing nesting and improving readability.
68/100 · AdequateMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context
AI analysis · Informational 15/100
This commit is a pure code cleanup: it extracts long error message strings into local variables before building the same error return values. There is no functional change, no security fix, and no change to what the program does.
Lower-priorityConsume vectors in monitor_updating_pausedby Joost Jager · 88485d24 · Jan 8, 2026 · 1 fileMessage 62 · AdequateInformational 15Details
Commit message · Joost Jager
Consume vectors in monitor_updating_paused
Using extend is slightly cleaner because it doesn't require mut on the parameters.
62/100 · AdequateMessage clarity
✓ Descriptive subject✓ Provides an explanatory body✓ Explains rationale or failure mode
AI analysis · Informational 15/100
This is a minor internal code cleanup in the Lightning Dev Kit's channel handling. It changes how a function accepts several lists of pending actions, switching from mutable references that append into internal storage to a style that consumes the vectors directly. There is no user-visible behavior change and no security relevance.
AI review queuedRustfmt channel methodsby Joost Jager · 8ae40eed · Jan 8, 2026 · 1 fileMessage 28 · OpaqueInformational 15Details
Commit message · Joost Jager
Rustfmt channel methods
28/100 · OpaqueMessage clarity
✓ Subject identifies a change! No meaningful explanatory body
Why it was queued
second-pass: opaque commit message
AI analysis · Informational 15/100
This commit is purely a code-formatting cleanup. It removes `#[rustfmt::skip]` annotations from three methods in the Lightning channel code and lets rustfmt reformat the function signatures, calls, and log statements across multiple lines. No logic, behavior, or security checks were changed.
AI review queuedAdd logger to monitor_updating_pausedby Joost Jager · cafbd568 · Jan 8, 2026 · 2 filesMessage 35 · OpaqueInformational 14Details
Commit message · Joost Jager
Add logger to monitor_updating_paused
35/100 · OpaqueMessage clarity
✓ Descriptive subject! No meaningful explanatory body
Why it was queued
second-pass: opaque commit message
AI analysis · Informational 14/100
This commit only adds a logging parameter to an internal helper function and its callers. It does not change program logic, state handling, or security behavior. The change is purely for better observability when channel monitor updates are paused.
Lower-priorityAdd a pending changelog note for breaking invreq blinded pathsby Matt Corallo · d7b86e58 · Jan 6, 2026 · 1 fileMessage 50 · ThinInformational 15Details
Commit message · Matt Corallo
Add a pending changelog note for breaking invreq blinded paths
50/100 · ThinMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component! No meaningful explanatory body
Why it was queued
documentation-only discount
AI analysis · Informational 15/100
This commit only adds a pending changelog note. It documents that outbound payments waiting for a BOLT 12 invoice response will fail to complete after upgrading to version 0.3. There is no code change, no vulnerability, and no security fix in this commit itself.
Lower-prioritySplit `OffersContext::OutboundPayment` into `InRefund`/`InInvReq`by Matt Corallo · 92038188 · Jan 6, 2026 · 4 filesMessage 85 · StrongLow 26Details
Commit message · Matt Corallo
Split `OffersContext::OutboundPayment` into `InRefund`/`InInvReq`
Because they end up both being used to validate a `Bolt12Invoice`, we ended up with a single `OffersContext` both for inclusion in a `Refund` and an `InvoiceRequest`. However, this is ambiguous, and while it doesn't seem like an issue, it also seems like a nice property to only use a given `OffersContext` in one place.
Further, in the next commit, we use `OffersContext` to figure out what we're building a blinded path for and changing behavior based on it, so its nice to be unambiguous.
Thus, we split the single existing context into `OutboundPaymentInRefund` and `OutboundPaymentInInvReq`.
85/100 · StrongMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Explains rationale or failure mode
Why it was queued
defensive validation
AI analysis · Low 26/100
This commit refactors how the Lightning Dev Kit tracks whether a BOLT12 invoice is tied to a Refund versus a regular InvoiceRequest. Previously, one shared context type was used for both, which could lead to ambiguous handling. The change splits that shared context into two distinct variants and adds checks so that Refund-only contexts are only accepted for Refund invoices and InvoiceRequest contexts only for Offer invoices. It is a hardening/correctness change rather than a clear-cut security fix, but it removes ambiguity that could in principle be abused to trick the code into accepting an invoice in the wrong context.
Lower-priorityMake `DefaultMessageRouter` use the context to pad/compact pathsby Matt Corallo · 485ae4e0 · Jan 6, 2026 · 3 filesMessage 93 · StrongLow 35Details
Commit message · Matt Corallo
Make `DefaultMessageRouter` use the context to pad/compact paths
After much discussion in #3246 we mostly decided to allow downstream developers to override whatever decisions the `DefaultMessageRouter` makes regarding blinded path selection by providing easy overrides for the selected `OnionMessageRouter`. We did not, however, actually select good defaults for `DefaultMessageRouter`.
Here we add those defaults, taking advantage of the `MessageContext` we're given to detect why we're building a blinded path and selecting blinding and compaction parameters based on it.
Specifically, if the blinded path is not being built for an offers context, we always use a non-compact blinded path and always pad it to four hops (including the recipient).
However, if the blinded path is being built for an `Offers` context which implies it might need to fit in a QR code (or, worse, a payment onion), we reduce our padding and try to build a compact blinded path if possible.
We retain the `NodeIdMessageRouter` to disable compact blinded path creation but use the same path-padding heuristic as for `DefaultMessageRouter`.
93/100 · StrongMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Explains rationale or failure mode✓ Links an issue, advisory, or supporting reference
AI analysis · Low 35/100
This commit changes how Lightning Dev Kit builds private 'blinded paths' used to route messages without revealing the recipient's exact location. It makes the default router choose shorter, more compact paths when the message is part of a BOLT 12 offer that might be encoded in a QR code, and longer, padded paths otherwise. The goal is to balance privacy with fitting data into QR codes and payment onions. The change itself is a privacy-tuning improvement, not a direct security bug fix, though it touches code that affects how easily a recipient can be identified.
Lower-priorityAlways pad `BlindedMessagePath` hop data to a consistent lengthby Matt Corallo · c589389f · Jan 6, 2026 · 6 filesMessage 85 · StrongModerate 51Details
Commit message · Matt Corallo
Always pad `BlindedMessagePath` hop data to a consistent length
If we're building a blinded message path with extra dummy hops, we have to ensure we at least hide the length of the data in pre-final hops as otherwise the dummy hops are trivially obvious. Here we do so, taking an extra `bool` parameter to `BlindedMessagePath` constructors to decide whether to pad every hop to the existing `MESSAGE_PADDING_ROUND_OFF` or whether to only ensure that each non-final hop has an identical hop data length.
In cases where the `DefaultMessageRouter` opts to use compact paths, it now also selects compact padding, whether short channel IDs are available or not.
85/100 · StrongMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Explains rationale or failure mode
AI analysis · Moderate 51/100
This commit fixes a privacy leak in Lightning onion messages. When building a blinded path with fake 'dummy' hops, the program previously did not always hide the size of the data carried at each hop. That made the dummy hops easy to spot, defeating their purpose. The patch adds a new padding mode so that every non-final hop is padded to the same length, keeping dummy hops indistinguishable from real ones. It also lets compact paths use this same minimal padding instead of skipping padding entirely.
Lower-priorityAdd additional documentation on when to use `NodeIdMessageRouter`by Matt Corallo · dc623d3c · Jan 6, 2026 · 1 fileMessage 50 · ThinInformational 15Details
Commit message · Matt Corallo
Add additional documentation on when to use `NodeIdMessageRouter`
50/100 · ThinMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component! No meaningful explanatory body
AI analysis · Informational 15/100
This commit only adds a three-line documentation comment explaining when developers might want to use a specific message-routing helper. It does not change any code behavior, fix a bug, or alter security logic.
Lower-priorityAdd a trivial helper to LSPS5's `WebhookNotification`by Matt Corallo · c06aa96e · Jan 5, 2026 · 2 filesMessage 73 · AdequateInformational 15Details
Commit message · Matt Corallo
Add a trivial helper to LSPS5's `WebhookNotification`
`LSPS5ServiceEvent::SendWebhookNotification`'s docs say to send the `WebhookNotification` as the HTTP request body "as JSON", which is great, but it leaves the dev to figure out how to do that. Its nice to have a helper to do that, which is trivial so we provide it here.
73/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context
AI analysis · Informational 15/100
This commit adds a small convenience helper that converts an LSPS5 webhook notification into a JSON string. It is purely a developer-experience improvement and does not change any security behavior.
Lower-priorityRefactor payment_hash to return PaymentHashby psychemist · 9c802c25 · Jan 4, 2026 · 5 filesMessage 78 · AdequateInformational 18Details
Commit message · psychemist
Refactor payment_hash to return PaymentHash
This commit fixes the payment_hash function of Bolt11Invoice to return a PaymentHash type instead of a sha256 byte stream. Code and test files dependent on this function have also been modified to adhere to the updated changes.
78/100 · AdequateMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Mentions testing or verification
AI analysis · Informational 18/100
This is a routine code cleanup that changes how a BOLT 11 invoice exposes its payment hash. Previously the function returned a raw SHA-256 hash object; now it returns a typed PaymentHash wrapper. All callers are updated to use the new type. There is no security bug being fixed here and no behavior change to the Lightning protocol logic.