Duncan Dean [Tue, 9 Jan 2024 07:07:01 +0000 (09:07 +0200)]
Remove `Outpoint::to_channel_id` method
To avoid confusion and for accuracy going forward, we remove this method
as it is inconsistent with channel IDs generated during V2 channel
establishment. If one wants to create a V1, funding outpoint-based
channel ID, then `ChannelId::v1_from_funding_outpoint` should be used
instead.
A large portion of the library has always made the assumption that having
the funding outpoint will always allow us to generate the channel ID.
This will not be the case anymore and we need to pass the channel ID along
where appropriate. All channels that could have been persisted up to this
point could only have used V1 establishment, so if some structures don't
store a channel ID for them they can safely fall back to the funding
outpoint-based version.
Jeffrey Czyz [Thu, 18 Jan 2024 21:34:19 +0000 (15:34 -0600)]
Fix panic when peer is mid-handshake
Peer::their_node_id is set to Some during the handshake process.
However, df3ab2ee2753e7f9ec02ddf1c8a51db77c50e35d accesses the field
unconditionally, causing a panic. This may be triggered if a gossip
message is received mid-handshake from another peer or if the user calls
broadcast_node_announcement during this time. The latter tends to be
executed on a timer.
Ensure that Peer::their_node_id is only accessed once the handshake is
complete.
Matt Corallo [Mon, 22 Jan 2024 20:26:32 +0000 (20:26 +0000)]
Fix deadlock when handling bad calls to `batch_funding.._generated`
When handling calls to `batch_funding_transaction_generated` which
were missing outputs for one of the batch channels, we'd previously
deadlock when trying to clean up the now-closed channels. This
fixes that and adds a new test case for it.
Jeffrey Czyz [Thu, 11 Jan 2024 19:13:12 +0000 (13:13 -0600)]
Use consistent cltv_expiry_delta in ForwardTlvs
When converting from CounterpartyForwardingInfo to PaymentRelay, the
cltv_expiry_delta is copied. Then, when forming a blinded payment path,
the value is mutated so that esoteric values don't reveal information
about the path. However, the value was only used in computing
PaymentConstraints and wasn't actually updated in PaymentRelay. Move the
logic for modifying the cltv_expiry_delta to the conversion code to
avoid this inconsistency.
Fix sender double-including shadow offset in CLTV expiry height.
The excess delta is included in the final RouteHop::cltv_expiry_delta, so by
adding it explicitly to cur_cltv we were erroneously including it twice in the
total cltv expiry.
This could've add up to an extra MAX_SHADOW_CLTV_DELTA_OFFSET (432) blocks to
the total cltv expiry.
Matt Corallo [Mon, 15 Jan 2024 01:25:10 +0000 (01:25 +0000)]
Move cryptographic algorithms and utilities to a new `crypto` mod
As we'd generally like the `lightning` crate to, over time, have
more modules rather than being very monolithic, we should move the
cryptographic things into their own module, which we do here.
We also take this opportunity to move stream adapters into their
own module and make clear that the ChaChaPoly `decrypt` method is
variable time.
Jeffrey Czyz [Tue, 31 Oct 2023 19:27:29 +0000 (14:27 -0500)]
Functional tests for BOLT 12 Offers payment flow
ChannelManager provides utilities to create offers and refunds along
with utilities to initiate and request payment for them, respectively.
It also manages the payment flow via implementing OffersMessageHandler.
Test that functionality, including the resulting event generation.
Jeffrey Czyz [Thu, 4 Jan 2024 16:30:51 +0000 (10:30 -0600)]
Remove "no-std" feature checks
An upcoming rust-bitcoin release will remove the "no-std" feature.
Replace "no-std" in feature checks with "std", negating as needed. Using
a single feature flag makes the checks more consistent across modules.
Jeffrey Czyz [Thu, 14 Dec 2023 16:25:10 +0000 (10:25 -0600)]
Have TestRouter wrap DefaultRouter
TestRouter checks route and scoring expectations before delegating to
the standalone find_route function. Refactor it to wrap DefaultRouter
and delegate to it instead. This allows TestRouter to implement
create_blinded_payment_paths by delegating to DefaultRouter.
Jeffrey Czyz [Fri, 27 Oct 2023 18:27:55 +0000 (13:27 -0500)]
Support OnionMessenger in functional_test_utils
OnionMessenger is needed to write functional tests for ChannelManager's
OffersMessageHandler implementation. Also adds a TestMessageRouter,
which simply wraps DefaultMessageRouter for now.
Jeffrey Czyz [Wed, 3 Jan 2024 21:41:00 +0000 (15:41 -0600)]
DRY up EntropySource implementation
The ChaCha20-based EntropySource implementation is duplicated within the
sign module. Refactor those into a RandomBytes implementation so that it
may be reused both there. Also useful as a standalone EntropySource
implementation for tests where an independent EntropySource is needed to
ensure that backwards-compatibility testing is not broken.
Jeffrey Czyz [Wed, 1 Nov 2023 18:12:44 +0000 (13:12 -0500)]
Add peel_onion_message method to OnionMessenger
When testing OnionMessenger in functional tests, it would be useful to
examine the contents of an OnionMessage response. Expose the standalone
peel_onion_message on OnionMessenger to facilitate this.
Previously, we were setting the final blinded hop's CLTV expiry height to
best_block_height + total_blinded_path_cltv_delta + shadow_cltv_offset. This is
incorrect, it should instead be set to best_block_height + shadow_cltv_offset
only -- it doesn't make sense to include the delta for the other blinded hops
in the final hop's expiry.
The reason this too-high final cltv value didn't cause test failures previously
is because of a 2nd bug that is fixed in an upcoming commit where the sender
adds the shadow offset twice to the total path CLTV expiry. This 2nd offset
meant that intermediate nodes had some buffer CLTV to subtract their delta from
while still (usually) have enough leftover to meet the expiry in the final hop's
onion.
Matt Corallo [Wed, 10 Jan 2024 18:27:57 +0000 (18:27 +0000)]
Expose `onion_message` items directly rather than via re-exports
When we originally added the `onion_message` module, there weren't
a lot of public items in it, and it didn't make a lot of sense to
export the whole sub-module structure publicly. So, instead, we
exported the public items via re-exports directly in the
`onion_message` top-level module. However, as time went on, more
and more things entered the module, which left the top-level module
rather cluttered.
Worse, in 0.0.119, we exposed
`onion_message::messenger::SendSuccess` via the return type of
`send_message`, but forgot to re-export the enum itself, making
it impossible to actually use from external code.
Here we address both issues and simply replace the re-export with
the underlying sub-module structure.
Matt Corallo [Wed, 10 Jan 2024 22:24:43 +0000 (22:24 +0000)]
Drop `PeerManager` type bound on `UtxoLookup` entirely
In 67659677d4fdb6bf418d66dfa37c61706425232b we relaxed the bounds
set on `UtxoLookup` to enable those using `RoutingMessageHandler`
other than `P2PGossipSync` to use `UtxoLookup`. Sadly, because this
requires having a concrete `PeerManager` type which does *not* use
`UtxoLookup` in the `RoutingMessageHandler` type, this broke users
who were directly using `P2PGossipSync`.
We could split `UtxoLookup` into two, with different bounds, for
the two use-cases, but instead here we simply switch to storing a
reference to the `PeerManager` via a `dyn Fn` which allows us to
wake the `PeerManager` when we need to.