When sending an onion message to a blinded path, the short channel id
between hops isn't need in each hop's encrypted_payload since it is not
a payment. However, using the short channel id instead of the node id
gives a more compact representation. Update BlindedPath::new_for_message
to allow for this.
Matt Corallo [Sun, 19 May 2024 18:35:04 +0000 (18:35 +0000)]
Log how many nodes/channels we have synced when we try to route
A common issue in LN is not having fully synced the network graph
when we attempt to send a payment. This should be improved
substantially with gossip v1.5, but for now we should improve our
debugability by logging how many nodes we have in our graph when
we attempt to find a route.
Filip Gospodinov [Fri, 17 May 2024 15:00:44 +0000 (17:00 +0200)]
Re-export bitcoin crate
For the same reason the `bitcoin` crate is re-exporting
the `secp256k1` crate the `lightning` crate should
re-export the `bitcoin` crate: to ease the burden on
calling code to maintain compatible `bitcoin` versions.
The `lightning` crate makes heavy use of types defined in
(or re-exported by) the `bitcoin` crate. Compilation will
fail if e.g. comparisons or `match` expressions are done with
types from `bitcoin` crate versions with a non-equal minor
version. This forces calling code to depend on a `bitcoin`
crate with a compatible version. This becomes a maintenance
nightmare once two or more crates, that use `bitcoin` types
in their public API, are used in calling code simultaneously.
Matt Corallo [Mon, 13 May 2024 14:36:01 +0000 (14:36 +0000)]
impl `Clone` on various public (mostly BOLT12) types
This is required for bindings as passing types from Rust to GC'd
languages can't map the concept of a type that has a lifetime of
the called function but instead needs to clone for safety.
Matt Corallo [Sat, 11 May 2024 18:51:48 +0000 (18:51 +0000)]
Make `offers::Amount` `Copy` and export it in bindings
`Amount` is less than two pointers long, so there's no reason it
shouldn't be `Copy`. Further, because its an enum, bindings can't
map a reference to it in an `Option`. Thus, here, we simply make it
`Copy` and return it in `Option`s rather than a reference to it.
Jeffrey Czyz [Fri, 10 May 2024 18:58:41 +0000 (13:58 -0500)]
Stop writing EcdsaChannelSigner
EcdsaChannelSigner is no longer deserialized as of version 0.0.113 and
downgrades before version 0.0.113 are no longer supported as of version
0.0.119.
Matt Corallo [Mon, 6 May 2024 01:23:56 +0000 (01:23 +0000)]
Ignore partially-pruned channels during routing
If we prune one side of a channel's `ChannelUpdateInfo` that means
the node hasn't been online for two weeks (as they haven't
generated a new `channel_update` in that time). In such cases, even
if we haven't yet pruned the channel entirely, we should definitely
not be treating these channels as candidates for routing.
Note that this requires some additional `channel_update`s in the
router tests, but all of the new ones are added as disabled
channels.
Matt Corallo [Tue, 30 Apr 2024 17:11:54 +0000 (17:11 +0000)]
Use consistent byte/char offsets when parsing invoice HRPs
When parsing lightning-invoice HRPs we want to read them
char-by-char, tracking at which offset different fields were. Prior
to this commit this was done first by reading char-by-char and then
by indexing using the byte offset which works for ASCII strings but
fails on multi-byte characters.
This commit fixes this issue by simply always walking byte-by-byte
and rejecting multi-byte characters which don't belong in HRPs.
Matt Corallo [Tue, 7 May 2024 16:34:36 +0000 (16:34 +0000)]
Fix the `full_stack_target` breakage test and doc feerate requests
When we added the additional deust exposure checks in 702196819e6445048b803574fcacef77d5ce8c9c we added several
additional feerate fetches which broke the `full_stack_target`
change-detection test.
This updates the hard-coded test to support the new feerate fetches
and also includes a comment on `FeeEstimator` to indicate that
users really need to be caching feerates as otherwise they'll slow
us down.
Matt Corallo [Sun, 5 May 2024 00:44:07 +0000 (00:44 +0000)]
Update default dust exposure limit and the documentation thereof
Now that we're including excess counterparty commitment transaction
fees in our dust calculation, we need to update the docs
accordingly. We do so here, describing some of the considerations
and risks that come with the new changes.
We also take this opportunity to double the default value, as users
have regularly complained that non-anchor channels fail to send
HTLCs with the default settings with some feerates.
Matt Corallo [Tue, 30 Apr 2024 20:42:36 +0000 (20:42 +0000)]
Include excess commitment transaction fees in dust exposure
Transaction fees on counterparty commitment transactions are
ultimately not our money and thus are really "dust" from our PoV -
they're funds that may be ours during off-chain updates but are not
ours once we go on-chain.
Thus, here, we count any such fees in excess of our own fee
estimates towards dust exposure. We don't bother to make an
inbound/outbound channel distinction here as in most cases users
will use `MaxDustExposure::FeeRateMultiplier` which will scale
with the fee we set on outbound channels anyway.
Note that this also enables the dust exposure checks on anchor
channels during feerate updates. We'd previously elided these as
increases in the channel feerates do not change the HTLC dust
exposure, but now do for the fee dust exposure.
Matt Corallo [Sun, 5 May 2024 19:52:58 +0000 (19:52 +0000)]
Provide more color in filter registration methods
A few years ago we had repeated user confusion dealing with the
`Filter` methods and exactly how they differ. Here we try to add a
bit more color in several ways as suggested by users in a few
places - listing examples of why the methods are used as well as
ensuring its clearly communicated that not all parameters need be
used.
shaavan [Mon, 25 Mar 2024 08:42:47 +0000 (14:12 +0530)]
Introduce ResponseInstructions for OnionMessage Handling
- Currently, handle_message (or handle_custom_message) only exposes
the generated response for an OnionMessage, lacking the necessary
reply_path for asynchronous responses.
- This commit introduces a new flow for OnionMessage handling.
- Instead of solely taking the message as input, handle_message now accepts
an Optional `responder`, returning a `ResponseInstruction` containing both
the response and the reply_path.
- `ResponseInstruction` utilizes different enum variants to indicate how
`handle_onion_message_response` should handle the response.
- This enhancement enables exposing the reply_path alongside the response
and allows for more complex response mechanisms, such as responding with
an added reply_path.
- The commit introduces the foundational framework (structs & enums) for this new flow.
Jeffrey Czyz [Thu, 2 May 2024 16:43:04 +0000 (11:43 -0500)]
Only require description when offer has an amount
The spec was changed to allow excluding an offer description if the
offer doesn't have an amount. However, it is still required when the
amount is set.
Matt Corallo [Wed, 1 May 2024 21:56:04 +0000 (21:56 +0000)]
Swap `UserConfig::default()` for `test_default_channel_config`
As LDK changes, `UserConfig::default()` may imply marginally
different behavior, whereas `test_default_channel_config` is
intended to tweak defaults to provide a stable behavior for test
contexts.
This commit changes a few uses of `UserConfig::default()` to
`test_default_channel_config` in cases that will fail over the
coming commits due to dust changes.
Matt Corallo [Wed, 27 Mar 2024 02:14:50 +0000 (02:14 +0000)]
Unify `get_{inbound,outbound}_pending_htlc_stats`
In most cases we already call both in a pair, and in fact always
consolidate some of the returned values across both accessors, so
there's not much reason to have them be separate methods.
Matt Corallo [Tue, 30 Apr 2024 21:30:26 +0000 (21:30 +0000)]
Wake `background-processor` from `ChainMonitor` on new blocks
When we receive a new block we may generate
`Event::SpendableOutputs` in `ChannelMonitor`s which then need to
be processed by the background processor. While it will do so
eventually when its normal loop goes around, this may cause user
tests to be delayed in finding events, so we should notify the BP
immediately to wake it on new blocks.
We implement that here, unconditionally notifying the
`background-processor` whenever we receive a new block or confirmed
transactions.
Matt Corallo [Wed, 1 May 2024 15:49:59 +0000 (15:49 +0000)]
Move `[u8; 32]` wrapper types to a common module
The `PaymentHash`, `PaymentSecret`, `PaymentPreimage`, and
`ChannelId` types are all small wrappers around `[u8; 32]` and are
used throughout the codebase but were defined in the top-level
`ln/mod.rs` file and the relatively sparsely-populated
`ln/channel_id.rs` file.
Here we move them to a common `types` module and go ahead and
update all our in-crate `use` statements to refer to the new
module for bindings. We do, however, leave a `pub use` alias for
the old paths to avoid upgrade hassle for users.
Matt Corallo [Wed, 1 May 2024 15:19:20 +0000 (15:19 +0000)]
Add bindings no-export tags to doc test types
We don't actually intend these to be public as they're just for
docs but the bindings don't currently parse `#[doc(hidden)]` as
"no-export" so we add manual no-export tags as well.
Matt Corallo [Tue, 23 Apr 2024 15:56:13 +0000 (15:56 +0000)]
Rename and expose message-specific `NextHop`
`onion::message::messenger::PeeledOnion` is a public enum which
included the private enum `NextHop`, which is not acceptable. Thus,
we here expose `NextHop` but rename it `NextMessageHop` to make
clear that it is specific to messages.
Matt Corallo [Tue, 30 Apr 2024 13:45:45 +0000 (13:45 +0000)]
Fix new rustc `#[macro_export]` warning in doctests
rustc now warns any time a `#[macro_export]` is used inside a
function as it generates surprising results. Because doctests are
run inside implicit test functions this means any use of
`#[macro_export]` inside a doctest will now warn. We do this in
`lightning-custom-message` to demonstrated how to use the crate,
which now fails to compile.
Here we fix this by adding an `fn main() {}` to the doctest, which
causes doctests to be compiled as freestanding code rather than
inside a test function.
Note that while discussing this upstream it came up that rustc is
also planning on changing the way doctests are compiled to compile
an entire crate's doctests in one go rather than in separate
crates, causing doctests to have a shared namespace which may
generate future surprising outcomes.
Matt Corallo [Mon, 29 Apr 2024 21:05:52 +0000 (21:05 +0000)]
Send peers error messages for failures due to invalid batch funding
If we fail to fund a batch open we'll force-close all channels in
the batch, however would previously fail to send error messages to
our peers for any channels we were due to test after the one that
failed.
This commit fixes that issue, sending the required error messages
to allow our peers to clean up their state.
Matt Corallo [Mon, 29 Apr 2024 18:12:59 +0000 (18:12 +0000)]
Close channels when `find_funding_output` fails to find an output
In `funding_transaction_generated_intern`, if `find_funding_output`
fails (e.g. due to the require output not being present in the
provided funding transaction) we'd previously not generated a
`ChannelClosed` event which leaves users possibly in a confused
state.
Here we fix this, also fixing the relevant tests to check for the
new event.
InvoiceRequestFeatures may contain a large, odd bit. Including this in
InvoiceRequestFields, which is in each BlindedPath of a Bolt12Invoice,
could cause the invoice's onion message to exceed the maximum size. The
features are already checked before sending an invoice.
Event::PaymentClaimable and Event::PaymentClaimed already contain the
paid amount, so there's no need to included the requested amount in
InvoiceRequestFields.
PaymentContext is already stored in ClaimablePayment via PaymentPurpose,
so there is no need to repeat it in each ClaimableHTLC via OnionPayload.
This avoids cloning the PaymentContext each time an HTLC is received,
other than for the first HTLC for a payment.