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lightningdevkit / rust-lightning Public

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Full Trampoline Support#4414

Draft

carlaKC wants to merge 64 commits intolightningdevkit:mainlightningdevkit/rust-lightning:mainfrom

carlaKC:2299-end-to-endcarlaKC/rust-lightning:2299-end-to-endCopy head branch name to clipboard

Conversation Commits64 (64)Checks Files changed

Draft

Full Trampoline Support#4414
carlaKC wants to merge 64 commits intolightningdevkit:mainfrom
carlaKC:2299-end-to-end

Commits

Commits on Feb 24, 2026

Use HTLC CLTV instead of onion CLTV values for payment claim timer
TheBlueMatt
committed
Fix trampoline onion encoding to match doc-declared CLTV rules
TheBlueMatt
committed
Clarify CLTV value selection in the first blinded hop marginally
TheBlueMatt
committed
Add a `Path::total_cltv_expiry_delta` accessor
TheBlueMatt
committed
Validate CLTV somewhat in `Route::debug_assert_route_meets_params`
TheBlueMatt
committed
Rename `starting_htlc_offset` `cur_block_height` in onion building
TheBlueMatt
committed

Commits on Feb 25, 2026

ln/events: multiple htlcs in/out for trampoline PaymentForwarded
carlaKC
committed
f note 0.3 and above downgrade information loss in event reporting
carlaKC
committed
f downgrade note should be inclusive of 0.0.123
carlaKC
committed
[upstream] f Test failure belongs on upstream rebase
carlaKC
committed
ln: make event optional in EmitEventAndFreeOtherChannel
carlaKC
committed
ln/refactor: rename EmitEventAndFreeOtherChannel to note optional event
carlaKC
committed
ln+events: allow multiple prev_channel_id in HTLCHandlingFailed
carlaKC
committed
events: add TrampolineForward variant to HTLCHandlingFailureType
carlaKC
committed
ln: add TrampolineForward SendHTLCId variant
carlaKC
committed
ln: add TrampolineForward variant to HTLCSource enum

authored and
carlaKC
committed
f do not allow read of HTLCSource::TrampolineForward
carlaKC
committed
f note that trampoline SendHTLCId will be distinct for TrampolineForward
carlaKC
committed
f note that TrampolineDispatch is just a single MPP part, not payment
carlaKC
committed
ln: add failure_type helper to HTLCSource for HTLCHandlingFailureType
carlaKC
committed
ln/refactor: add claim funds for htlc forward helper

committed
ln/refactor: pass closure to create PaymentForwarded event
carlaKC
committed
ln: add trampoline routing payment claiming

committed
ln/refactor: add blinded forwarding failure helper function

committed
ln: add trampoline routing failure handling

committed
ln/refactor: extract channelmonitor recovery to external helper

committed
ln: add channel monitor recovery for trampoline forwards
carlaKC
committed
ln/refactor: move outgoing payment replay code into helper function
carlaKC
committed
ln: handle trampoline claims on restart
carlaKC
committed
ln: store incoming mpp data in PendingHTLCRouting
carlaKC
committed
ln: use total_msat to calculate the amount for our next trampoline
carlaKC
committed
ln: use outer onion cltv values in PendingHTLCInfo for trampoline
carlaKC
committed
ln: store next trampoline amount and cltv in PendingHTLCRouting
carlaKC
committed
ln: use outer onion values for trampoline NextPacketDetails
carlaKC
committed
ln/refactor: move mpp timeout check into helper function
carlaKC
committed
ln/refactor: move on chain timeout check into claimable htlc
carlaKC
committed
[wip]: add Trampoline variant to OnionPayload
carlaKC
committed
[wip]: add awaiting_trampoline_forwards to accumulate inbound MPP
carlaKC
committed
ln/refactor: move checks on incoming mpp accumulation into method
carlaKC
committed
ln: handle claimable htlcs for payments in dedicated method
carlaKC
committed
ln: move receive-specific failures into fail_htlc macro
carlaKC
committed
ln: add trampoline mpp accumulation and with rejection of forwards
carlaKC
committed
ln/refactor: pass minimum delta into check_incoming_htlc_cltv
carlaKC
committed
ln: process added trampoline htlcs with CLTV validation
carlaKC
committed
ln: add trampoline forward info to PendingOutboundPayment::Retryable
carlaKC
committed
ln: thread trampoline routing information through payment methods
carlaKC
committed
ln: add blinding point to new_trampoline_entry
carlaKC
committed
ln function to build trampoline forwarding onions
carlaKC
committed
ln: support trampoline in send_payment_along_path
carlaKC
committed
ln: add send trampoline payment functionality
carlaKC
committed
ln/refactor: surface error data in DecodedOnionData for Trampolines
carlaKC
committed
[wip] ln: add trampoline htlc failure logic to outbound payments
carlaKC
committed
ln: add claim_trampoline_forward to mark trampoline complete
carlaKC
committed
ln: handle trampoline payments in finalize_claims
carlaKC
committed
ln: block on inbound claim for trampoline update_fulfill_htlc
carlaKC
committed
ln: de-duplicate trampoline forwards with failed_htlcs
carlaKC
committed
ln: only fail trampoline payments backwards when payment state ready
carlaKC
committed
ln: claim trampoline payment on completion
carlaKC
committed
ln: use correct blinding point for trampoline payload decodes
carlaKC
committed
ln: allow reading HTLCSource::TrampolineForward
carlaKC
committed
ln: add trampoline payment dispatch after inbound accumulation
carlaKC
committed
ln/test: only use replacement onion in trampoline tests when needed
carlaKC
committed
[deleteme]: remove assertion that fails on unblinded test
carlaKC
committed
ln/test: add coverage for blinded and unblinded trampoline forwarding
carlaKC
committed

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