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Jeffrey Czyz

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177 commits1 monitored projects41 candidates0 high-risk analyses
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rust-lightningLightning Dev Kit177 commits41 candidates0 high risk
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Informational 15 AI analysisMessage 83 · Strong
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Test cross-version serialization of pending splices

This commit only adds new test code. It exercises how a newer version of LDK exchanges saved channel data with the older LDK 0.2 release when a channel has a pending splice. There is no change to production logic, no bug fix, and no securi…

0beadb3bby Jeffrey Czyz+208−01 file
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Informational 15 AI analysisMessage 78 · Adequate
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Use a builder for sign_interactive_funding_tx arguments

This commit is a code cleanup inside the project's test suite. It replaces a helper function with several hard-to-read positional arguments (like bare `false` and `None`) with a 'builder' pattern that names each option. This makes the test…

ed250c02by Jeffrey Czyz+116−861 file
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Low 46 AI analysisMessage 90 · Strong
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Remove nonce from outbound payment OffersContexts

This commit removes an old cryptographic nonce from the data carried inside Lightning "blinded paths" used when sending BOLT 12 offers and refunds. The nonce is no longer needed because a newer "payer metadata" field already carries the sa…

Removes a redundant nonce from blinded-path context, relying on payer metadata for invoice authenticationRetains and enforces payment_id matching to prevent cross-payment invoice delivery over captured blinded pathsMaintains backward-compatible persistence of the nonce for downgrade/retry scenarios
b910f8ebby Jeffrey Czyz+33−354 files
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Low 33 AI analysisMessage 86 · Strong
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Include payer nonce in payer metadata again

This commit changes how BOLT12 invoices are verified in the Lightning Dev Kit. Previously, some invoices could be verified using a nonce stored in the blinded reply path context. Now, the nonce is always included inside the encrypted payer…

BOLT12 invoice verification now depends only on data inside the invoice request/refund, reducing reliance on external contextRemoves a verification path (verify_using_payer_data) that used reply-path context instead of invoice-contained metadataBreaks backward compatibility for prior-version invoice requests/refunds with blinded paths, causing payment failures
404d8c64by Jeffrey Czyz+47−995 files
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Informational 18 AI analysisMessage 73 · Adequate
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Document script_pubkey-only matching in into_unique_contributions

This commit only adds a comment explaining existing behavior in a Bitcoin Lightning funding function. It does not change any code logic. The behavior being documented—filtering duplicate outputs based only on their script address—could the…

Documentation-only changeDescribes intentional script_pubkey-only matching behaviorNotes that multiple outputs sharing a script are dropped together
f4139dbfby Jeffrey Czyz+7−01 file
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Informational 24 AI analysisMessage 85 · Strong
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Simplify contribution pop in reset_pending_splice_state

This is a small code cleanup in the Lightning payment channel code that handles failed or aborted splice-in transactions. The change removes an unnecessary check when undoing a splice contribution, replacing it with an unconditional pop pl…

State rollback logic in a Bitcoin Lightning channel implementationRemoval of a conditional guard on popping splice contribution historyAddition of a debug-only assertion about feerate ordering
2eb939b1by Jeffrey Czyz+13−131 file
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Moderate 57 AI analysisMessage 88 · Strong
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Skip pre-splice announcement_signatures on reestablish

This commit fixes a bug in the Lightning Dev Kit where reconnecting after a channel 'splice' (a funding update) could cause one peer to send outdated channel announcement signatures. The peer receiving those stale signatures would reject t…

Force-close trigger from stale announcement signaturesState inconsistency between pre-splice and post-splice funding during reestablishSignature verification failure on counterparty due to mismatched short_channel_id/bitcoin key
21fed17cby Jeffrey Czyz+135−12 files
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Moderate 62 AI analysisMessage 86 · Strong
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Ignore stale announcement_signatures instead of force-closing

This change fixes a bug where a Lightning node would unnecessarily force-close a payment channel if its peer sent an outdated 'announcement_signatures' message referencing the old channel identifier after a splice (a channel funding update…

Force-close avoidance on stale but spec-compliant peer messageSplicing handoff edge case in BOLT #7 announcement signature handlingChannel availability / DoS mitigation
80528b15by Jeffrey Czyz+96−02 files
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Low 44 AI analysisMessage 68 · Adequate
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Clear disconnect timer when exiting quiescence

This commit fixes a bug in the Lightning Dev Kit where a timer meant to disconnect unresponsive peers could fire by mistake after a splice operation completed, was aborted, or after reconnecting. The fix makes sure the timer is cleared whe…

Spurious peer disconnection due to stale disconnect timerState cleanup inconsistency between quiescent flag and response timerRegression tests added for completed splice, aborted splice, and reconnect scenarios
d2f422bfby Jeffrey Czyz+200−42 files
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Low 44 AI analysisMessage 73 · Adequate
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Handle FeeRateAdjustmentError variants in splice acceptor path

This commit fixes how a Lightning node responds when a peer proposes a splice or RBF transaction fee rate that is too high for the node to afford. Previously, the node would silently drop its own contribution and continue, which could let …

Explicit rejection of unaffordable fee rates in splice/RBF acceptor pathReplacement of generic error swallowing with variant-specific handlingAddition of AbortReason::FeeRateTooHigh and corresponding tx_abort behavior
5e521ac1by Jeffrey Czyz+194−184 files
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Low 32 AI analysisMessage 90 · Strong
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Handle tx_ack_rbf on the initiator side

This commit adds support in the Lightning Dev Kit for handling a specific protocol message (tx_ack_rbf) when a channel participant initiates a fee-bump (RBF) of a pending splice transaction. Previously, receiving this message caused an err…

New message handler validates state before processing (awaiting_ack_context / take_awaiting_ack_context)WarnAndDisconnect returned on unexpected funding-negotiation states, reducing protocol desynchronization riskFixes false debug assertion from premature clearing of interactive_tx_signing_session during RBF
b07bfff8by Jeffrey Czyz+417−873 files
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Low 33 AI analysisMessage 68 · Adequate
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Contribute to splice as acceptor

This commit changes how the Lightning Dev Kit handles a rare situation where both sides of a channel try to splice funds at the same time. Previously, the node that lost the tie-breaker would sit out and start a second splice later. Now, t…

Fee re-estimation at a different feerate for acceptor inputs/outputsChange-output value adjustment when acceptor contribution is mergedAcceptor contribution dropped if counterparty feerate is below min, above max with higher fee, or exceeds fee buffer
d964be91by Jeffrey Czyz+491−943 files
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Low 44 AI analysisMessage 58 · Thin
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Adjust FundingContribution for acceptor

This commit fixes a fee-calculation bug in Lightning splicing. Previously, when both sides tried to splice at the same time, the loser of a tie-break (the 'acceptor') built their contribution as if they were going to pay for the whole shar…

Fee overpayment / economic griefing: acceptor previously paid fees estimated for the initiator roleInsufficient-fee risk: acceptor's selected UTXOs might not cover a higher counterparty feerateNew defensive validation: min_feerate > max_feerate is rejected at API entry
7942c745by Jeffrey Czyz+1120−606 files
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Low 37 AI analysisMessage 73 · Adequate
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Include change output weight in estimate_transaction_fee

This commit fixes a fee-estimation bug in rust-lightning's channel funding and splicing code. When building a transaction that creates a change output, the code previously forgot to include the change output's size/weight when estimating t…

Underestimation of transaction fees in funding/splicing transaction constructionPotential acceptance of under-funded contributions leading to invalid or non-broadcastable transactionsAdded defensive validation test (`test_validate_accounts_for_change_output_weight`)
d9327ba9by Jeffrey Czyz+129−172 files
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Low 35 AI analysisMessage 73 · Adequate
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Stop persisting QuiescentAction and remove legacy code

This commit removes old, no-longer-used code paths for splicing (a way to resize a Lightning channel). It stops saving a 'quiescent action' to disk because the only remaining variant cannot be serialized, and it drops legacy change-output …

Removal of persisted state that could not be serialized (FundingContribution inside QuiescentAction::Splice)Clearing awaiting_quiescence flag on deserialization to prevent a channel from being stuck in an unactionable quiescent stateBackwards-compatible deserialization that discards obsolete TLV 65 data
3e9dff9cby Jeffrey Czyz+36−4975 files
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Informational 15 AI analysisMessage 68 · Adequate
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Extract contributed_{inputs|outputs} iterators

This commit is a straightforward internal code cleanup in the Lightning Dev Kit's transaction-building code. It replaces a few methods that always built full lists of contributed inputs and outputs with new iterator methods that let caller…

a4f2ea27by Jeffrey Czyz+38−232 files
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Low 32 AI analysisMessage 68 · Adequate
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Use CoinSelection::change_output when splicing

This commit changes how Lightning Dev Kit handles 'change' money during Bitcoin channel splicing. Previously, the user could provide a change address or LDK would generate one itself. Now, the wallet's coin-selection logic decides whether …

Change output handling moved from caller-provided/generated script to wallet coin-selection resultLegacy fallback retained for older serialized SpliceInstruction without change scriptSerialization format changed: FundingContribution TLV field 9 now stores change_output (TxOut) instead of change_script (ScriptBuf)
96b9e6afby Jeffrey Czyz+186−2117 files
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Informational 18 AI analysisMessage 73 · Adequate
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Add a read closure to the `legacy` TLV variant

This commit is a small, internal refactoring of a Rust serialization macro used in the Lightning Dev Kit. It adds an optional read-time callback to the 'legacy' type-length-value (TLV) field variant so future code can validate or reject de…

Adds a read-time validation hook for legacy TLV fieldsAll existing read closures are no-ops (`|_| Ok(())`)Preserves backward compatibility with `static_value` and `default_value` expressions
e71ad81aby Jeffrey Czyz+29−255 files
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Low 34 AI analysisMessage 85 · Strong
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Use SignedAmount::unsigned_abs to avoid overflow

This commit fixes a potential integer overflow bug in the Lightning Dev Kit's channel splicing code. The bug occurs when converting a negative Bitcoin amount to its absolute value in debug builds, which could crash the program. The fix use…

Integer overflow in debug mode on signed-to-absolute conversionUse of safer unsigned_abs API to eliminate panic pathValidation of funding contributions in splicing logic
2d948fddby Jeffrey Czyz+4−41 file
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Low 32 AI analysisMessage 68 · Adequate
LDK Lightning Dev Kitrust-lightning BitcoinCryptographic librariesLightning Network

Account for grind_signatures in splice funding tx

This commit fixes a fee-estimation bug in LDK's experimental splicing code. When the optional `grind_signatures` feature is enabled, signatures are guaranteed to be one byte smaller than the normal maximum. The splice funding-transaction f…

Fee-estimation mismatch between assumed max signature size and actual signature size when `grind_signatures` is enabledSplicing code path affected (v2 channel funding / interactive transaction construction)Test-only signing utility updated to use low-R signatures consistently with the feature flag
46980261by Jeffrey Czyz+97−496 files
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