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Replace OUR_MAX_HTLCS with config knob #2138

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swilliamson5
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@swilliamson5 swilliamson5 commented Mar 29, 2023

Add a config knob for holder_max_accepted_htlcs to replace the constant OUR_MAX_HTLCS.

resolves #1990

@swilliamson5 swilliamson5 changed the title Replace OUR_MAX_HTLCS with config knob [DRAFT] Replace OUR_MAX_HTLCS with config knob Mar 30, 2023
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You should add a config knob in ChannelHandshakeConfig in config.rs.

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codecov-commenter commented Apr 8, 2023

Codecov Report

Patch coverage: 94.11% and project coverage change: -0.03 ⚠️

Comparison is base (e1e3819) 91.35% compared to head (604eb91) 91.33%.

❗ Current head 604eb91 differs from pull request most recent head f656609. Consider uploading reports for the commit f656609 to get more accurate results

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Additional details and impacted files
@@            Coverage Diff             @@
##             main    #2138      +/-   ##
==========================================
- Coverage   91.35%   91.33%   -0.03%     
==========================================
  Files         102      102              
  Lines       50382    50389       +7     
  Branches    50382    50389       +7     
==========================================
- Hits        46027    46021       -6     
- Misses       4355     4368      +13     
Impacted Files Coverage Δ
lightning/src/util/config.rs 40.00% <0.00%> (-0.63%) ⬇️
lightning/src/ln/channel.rs 90.16% <100.00%> (+0.01%) ⬆️
lightning/src/ln/functional_tests.rs 98.25% <100.00%> (ø)

... and 3 files with indirect coverage changes

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Still needs more docs on the knob ( #2138 (comment) ) but the code looks good to me! When you do address that, feel free to rebase and squash so that its a clean set of non-merge commits based on upstream (see https://github.com/bitcoin/bitcoin/blob/master/CONTRIBUTING.md#rebasing-changes for how to).

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Probably can mark this non-draft too, when you get there :)

@swilliamson5 swilliamson5 changed the title [DRAFT] Replace OUR_MAX_HTLCS with config knob Replace OUR_MAX_HTLCS with config knob Apr 15, 2023
@swilliamson5 swilliamson5 marked this pull request as ready for review April 15, 2023 00:24
@swilliamson5 swilliamson5 force-pushed the replace-our-max-htlcs-constant branch 2 times, most recently from 54ca4fa to 09b9a19 Compare April 15, 2023 01:31
@swilliamson5 swilliamson5 force-pushed the replace-our-max-htlcs-constant branch from 09b9a19 to f8deb84 Compare April 15, 2023 01:34
@swilliamson5 swilliamson5 changed the title Replace OUR_MAX_HTLCS with config knob Replace OUR_MAX_HTLCS with config knob Apr 15, 2023
lightning/src/ln/channel.rs Outdated Show resolved Hide resolved
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@swilliamson5 swilliamson5 force-pushed the replace-our-max-htlcs-constant branch 2 times, most recently from c99da4c to 44ff074 Compare April 16, 2023 20:57
@swilliamson5 swilliamson5 force-pushed the replace-our-max-htlcs-constant branch from 44ff074 to fce8013 Compare April 16, 2023 21:56
TheBlueMatt
TheBlueMatt previously approved these changes Apr 16, 2023
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LGTM! We'll get another reviewer on this Monday, thanks!

lightning/src/ln/channel.rs Outdated Show resolved Hide resolved
holder_max_accepted_htlcs. Set upper bound of 483

Writes an even TLV if the value isn't 50
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looks good!

@TheBlueMatt TheBlueMatt merged commit 2ebbe6f into lightningdevkit:main Apr 17, 2023
k0k0ne pushed a commit to bitlightlabs/rust-lightning that referenced this pull request Sep 30, 2024
0.0.115 - Apr 24, 2023 - "Rebroadcast the Bugfixes"

API Updates
===========

 * The MSRV of the main LDK crates has been increased to 1.48 (lightningdevkit#2107).
 * Attempting to claim an un-expired payment on a channel which has closed no
   longer fails. The expiry time of payments is exposed via
   `PaymentClaimable::claim_deadline` (lightningdevkit#2148).
 * `payment_metadata` is now supported in `Invoice` deserialization, sending,
   and receiving (via a new `RecipientOnionFields` struct) (lightningdevkit#2139, lightningdevkit#2127).
 * `Event::PaymentFailed` now exposes a failure reason (lightningdevkit#2142).
 * BOLT12 messages now support stateless generation and validation (lightningdevkit#1989).
 * The `NetworkGraph` is now pruned of stale data after RGS processing (lightningdevkit#2161).
 * Max inbound HTLCs in-flight can be changed in the handshake config (lightningdevkit#2138).
 * `lightning-transaction-sync` feature `esplora-async-https` was added (lightningdevkit#2085).
 * A `ChannelPending` event is now emitted after the initial handshake (lightningdevkit#2098).
 * `PaymentForwarded::outbound_amount_forwarded_msat` was added (lightningdevkit#2136).
 * `ChannelManager::list_channels_by_counterparty` was added (lightningdevkit#2079).
 * `ChannelDetails::feerate_sat_per_1000_weight` was added (lightningdevkit#2094).
 * `Invoice::fallback_addresses` was added to fetch `bitcoin` types (lightningdevkit#2023).
 * The offer/refund description is now exposed in `Invoice{,Request}` (lightningdevkit#2206).

Backwards Compatibility
=======================

 * Payments sent with the legacy `*_with_route` methods on LDK 0.0.115+ will no
   longer be retryable via the LDK 0.0.114- `retry_payment` method (lightningdevkit#2139).
 * `Event::PaymentPathFailed::retry` was removed and will always be `None` for
    payments initiated on 0.0.115 which fail on an earlier version (lightningdevkit#2063).
 * `Route`s and `PaymentParameters` with blinded path information will not be
   readable on prior versions of LDK. Such objects are not currently constructed
   by LDK, but may be when processing BOLT12 data in a coming release (lightningdevkit#2146).
 * Providing `ChannelMonitorUpdate`s generated by LDK 0.0.115 to a
   `ChannelMonitor` on 0.0.114 or before may panic (lightningdevkit#2059). Note that this is
   in general unsupported, and included here only for completeness.

Bug Fixes
=========

 * Fixed a case where `process_events_async` may `poll` a `Future` which has
   already completed (lightningdevkit#2081).
 * Fixed deserialization of `u16` arrays. This bug may have previously corrupted
   the historical buckets in a `ProbabilisticScorer`. Users relying on the
   historical buckets may wish to wipe their scorer on upgrade to remove corrupt
   data rather than waiting on it to decay (lightningdevkit#2191).
 * The `process_events_async` task is now `Send` and can thus be polled on a
   multi-threaded runtime (lightningdevkit#2199).
 * Fixed a missing macro export causing
   `impl_writeable_tlv_based_enum{,_upgradable}` calls to not compile (lightningdevkit#2091).
 * Fixed compilation of `lightning-invoice` with both `no-std` and serde (lightningdevkit#2187)
 * Fix an issue where the `background-processor` would not wake when a
   `ChannelMonitorUpdate` completed asynchronously, causing delays (lightningdevkit#2090).
 * Fix an issue where `process_events_async` would exit immediately (lightningdevkit#2145).
 * `Router` calls from the `ChannelManager` now call `find_route_with_id` rather
   than `find_route`, as was intended and described in the API (lightningdevkit#2092).
 * Ensure `process_events_async` always exits if any sleep future returns true,
   not just if all sleep futures repeatedly return true (lightningdevkit#2145).
 * `channel_update` messages no longer set the disable bit unless the peer has
   been disconnected for some time. This should resolve cases where channels are
   disabled for extended periods of time (lightningdevkit#2198).
 * We no longer remove CLN nodes from the network graph for violating the BOLT
   spec in some cases after failing to pay through them (lightningdevkit#2220).
 * Fixed a debug assertion which may panic under heavy load (lightningdevkit#2172).
 * `CounterpartyForceClosed::peer_msg` is now wrapped in UntrustedString (lightningdevkit#2114)
 * Fixed a potential deadlock in `funding_transaction_generated` (lightningdevkit#2158).

Security
========

 * Transaction re-broadcasting is now substantially more aggressive, including a
   new regular rebroadcast feature called on a timer from the
   `background-processor` or from `ChainMonitor::rebroadcast_pending_claims`.
   This should substantially increase transaction confirmation reliability
   without relying on downstream `TransactionBroadcaster` implementations for
   rebroadcasting (lightningdevkit#2203, lightningdevkit#2205, lightningdevkit#2208).
 * Implemented the changes from BOLT PRs lightningdevkit#1031, lightningdevkit#1032, and lightningdevkit#1040 which resolve a
   privacy vulnerability which allows an intermediate node on the path to
   discover the final destination for a payment (lightningdevkit#2062).

In total, this release features 110 files changed, 11928 insertions, 6368
deletions in 215 commits from 21 authors, in alphabetical order:
 * Advait
 * Alan Cohen
 * Alec Chen
 * Allan Douglas R. de Oliveira
 * Arik Sosman
 * Elias Rohrer
 * Evan Feenstra
 * Jeffrey Czyz
 * John Cantrell
 * Lucas Soriano del Pino
 * Marc Tyndel
 * Matt Corallo
 * Paul Miller
 * Steven
 * Steven Williamson
 * Steven Zhao
 * Tony Giorgio
 * Valentine Wallace
 * Wilmer Paulino
 * benthecarman
 * munjesi
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Replace OUR_MAX_HTLCS constant with a config knob
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