Add Experimental Endorsement Signalling #8390

carlaKC · 2024-01-17T16:11:26Z

This PR adds the ability for LND to set and relay an experimental range endorsement field with UpdateAddHTLC.

Fixes #7883.

~~Depends on #9049, uses custom records added to payload descriptor!~~

coderabbitai · 2024-01-17T16:11:34Z

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carlaKC · 2024-05-22T14:46:35Z

Updated to depend on some of the new APIS, depends on #8660 so only the last 4 commits are relevant.

carlaKC · 2024-05-29T16:37:40Z

Opening this up for a high level conceptual review - code now matches what's outlined in the blip.

carlaKC · 2024-06-17T13:33:42Z

Updated feature bit values to match update to blip.

carlaKC · 2024-09-11T20:27:08Z

Rebased on master!

ellemouton

the testForwardInterceptorWireRecords itest which tests that custom records are set just needs to be adjusted to account for the new endorsed bit. Either explicitly checking that it is set too or just starting those itest nodes with the protocol.no-experimental-endorsement=false flag.

Other than that, this is g2g!

ellemouton · 2024-09-23T02:26:00Z

needs rebase and then we g2g I think

carlaKC · 2024-10-15T18:38:25Z

Haven't abandoned this - just ran into some itest issues, pushed with existing failures

We don't resolve incoming HTLCs if they have any custom records present, which means that on-chain resolution breaks for any HTLC which has an endorsement record attached which is ... bad.

Two possible approaches here:

Wait on completion of blocking TODO so that HTLCs with custom records can resolve
Turn off endorsement on itests

If (1) will be included in 19, I think it's slightly preferable to having to make changes to totally unrelated itests but open to opinions!

Roasbeef · 2024-10-17T21:55:15Z

Circling back on this, you can get the CI to pass if you change that check to instead checking for the TapscriptRoot channel type instead. There's an unmerged PR (#9194) that'll remove that block.

carlaKC · 2024-10-22T13:32:58Z

Circling back on this, you can get the CI to pass if you change that check to instead checking for the TapscriptRoot channel type instead. There's an unmerged PR (#9194) that'll remove that block.

Great! By this, do you mean:

Let's wait for the linked PR to merge then follow with this one
-> If yes, I'll rebase this + happy to help out with review once it's out of draft if that's helpful.
Let's update the CustomRecords check to unblock this PR:
-> If yes, I went ahead and pulled out the check in contractcourt: only halt resolution for TapscriptRoot channels #9208

Either option works for me!

carlaKC · 2024-11-01T17:50:17Z

Rebased on new dependent PRs!

Depends on #9240: with this change we need fewer workarounds in itests for the API peculiarity (described in #9166), and the tests that include endorsement give us coverage for testing merging of existing custom records and MODIFY records.

Depends on #9208: workaround to make itests run for channels that have custom records that aren't TapscriptRoot type.

ellemouton

Very nice - g2g once the dependant PRs are in. Also just one question about a case in the link where maybe we need to set the endorsement field (could be a misunderstanding on my part though)

htlcswitch/link.go

lntest/utils.go

itest/lnd_experimental_endorsement.go

ellemouton

LGTM once dependent PR is in! 🚢

lightninglabs-deploy · 2024-11-22T07:37:20Z

@carlaKC, remember to re-request review from reviewers when ready

Before we have sufficient signaling in the network to relay this signal, set a zero value experimental endorsement value on the sender's outgoing htlc. Once the network is relaying this signal and a flag day has been set, we'll be able to set a non-zero value here.

carlaKC · 2024-11-25T18:31:49Z

Rebased on dependent PRs / itest failures unrelated (listsweeps x2 + windows borked) - should be good to go!

carlaKC added the channel jamming Issues related to channel jamming mitigation label Jan 17, 2024

carlaKC force-pushed the 7883-experimental-endorsement branch from 294acee to 2e980c9 Compare May 22, 2024 14:45

carlaKC changed the base branch from master to 0-19-staging May 22, 2024 14:45

carlaKC force-pushed the 7883-experimental-endorsement branch 9 times, most recently from d07cd38 to d1bc9f7 Compare May 28, 2024 19:22

carlaKC marked this pull request as ready for review May 29, 2024 16:36

carlaKC force-pushed the 7883-experimental-endorsement branch from d1bc9f7 to 0cbce93 Compare June 17, 2024 13:32

saubyk assigned carlaKC Jun 27, 2024

saubyk added this to the 0.19.0 milestone Jun 27, 2024

carlaKC force-pushed the 7883-experimental-endorsement branch from 0cbce93 to 21af106 Compare June 28, 2024 18:04

carlaKC force-pushed the 7883-experimental-endorsement branch from 21af106 to ab99ae1 Compare August 12, 2024 19:30

carlaKC changed the base branch from 0-19-staging to 0-19-staging-rebased August 12, 2024 19:31

guggero force-pushed the 0-19-staging-rebased branch 4 times, most recently from 748cb42 to fdf9566 Compare August 22, 2024 13:29

saubyk requested review from ProofOfKeags and ellemouton August 22, 2024 17:10

carlaKC added the size/kilo medium, proper context needed, less than 1000 lines label Aug 22, 2024

ellemouton reviewed Sep 12, 2024

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carlaKC force-pushed the 7883-experimental-endorsement branch from eff8ab5 to e21cdd0 Compare September 12, 2024 12:26

ellemouton self-requested a review September 12, 2024 12:49

carlaKC force-pushed the 7883-experimental-endorsement branch from e21cdd0 to 36b5313 Compare September 12, 2024 13:39

carlaKC mentioned this pull request Oct 7, 2024

[API]: ForwardInterceptor overwrites existing CustomRecords #9166

Closed

carlaKC force-pushed the 7883-experimental-endorsement branch from 36b5313 to b80cdba Compare October 15, 2024 18:30

carlaKC force-pushed the 7883-experimental-endorsement branch from b80cdba to 50a8dda Compare October 22, 2024 13:30

carlaKC mentioned this pull request Oct 22, 2024

contractcourt: only halt resolution for TapscriptRoot channels #9208

Closed

carlaKC mentioned this pull request Nov 1, 2024

htlcswitch: merge htlc custom records on modify #9240

Merged

carlaKC force-pushed the 7883-experimental-endorsement branch from 50a8dda to 9de1365 Compare November 1, 2024 17:47

ellemouton reviewed Nov 7, 2024

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htlcswitch/link.go Show resolved Hide resolved

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lntest/utils.go Outdated Show resolved Hide resolved

itest/lnd_experimental_endorsement.go Show resolved Hide resolved

carlaKC force-pushed the 7883-experimental-endorsement branch from 9de1365 to ef51601 Compare November 7, 2024 20:38

ellemouton approved these changes Nov 8, 2024

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carlaKC added 5 commits November 22, 2024 09:16

htlcswitch: relay experimental endorsement signal with update_add_htlc

774bfa7

multi: add experimental endorsement feature bit and disable option

f02bb58

itest: add coverage for experimental endorsement

7a876e8

docs: add experimental endorsement

a8c159b

carlaKC force-pushed the 7883-experimental-endorsement branch from ef51601 to a8c159b Compare November 22, 2024 14:33

ellemouton merged commit fbeab72 into lightningnetwork:master Nov 26, 2024
28 of 34 checks passed

carlaKC mentioned this pull request Jan 10, 2025

Project Updates: Hybrid Channel Jamming Mitigation lightning/bolts#1218

Open

23 tasks

ziggie1984 mentioned this pull request Aug 3, 2025

bugfix payment lifecycle payment attempts #10125

Merged

Add Experimental Endorsement Signalling #8390

Add Experimental Endorsement Signalling #8390

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