Sadly the connected-in-order tests have to be skipped in our normal
test suite as many tests violate it. Luckily we can still enforce
it in the tests which run in other crates.
Co-authored-by: Matt Corallo <git@bluematt.me>
Co-authored-by: Jeffrey Czyz <jkczyz@gmail.com>
Useful for constructing route hints for private channels in invoices.
Co-authored-by: Valentine Wallace <vwallace@protonmail.com>
Co-authored-by: Antoine Riard <ariard@student.42.fr>
We currently only use it to override the graph-specific features
returned in the route, though we should also use it to enable or
disable MPP.
Note that tests which relied on MPP behavior have had all of their
get_route calls upgraded to provide the MPP flag.
When ChannelMonitors are persisted, they need to store the most recent
block hash seen. However, for newly created channels the default block
hash is used. If persisted before a block is connected, the funding
output may be missed when syncing after a restart. Instead, initialize
ChannelManager with a "birthday" hash so it can be used later when
creating channels.
If the ChannelManager never receives any blocks, it'll return a default blockhash
on deserialization. It's preferable for this to be an Option instead.
ChainMonitor accesses a set of ChannelMonitors behind a single Mutex.
As a result, update_channel operations cannot be parallelized. It also
requires using a RefCell around a ChannelMonitor when implementing
chain::Listen.
Moving the Mutex into ChannelMonitor avoids these problems and aligns it
better with other interfaces. Note, however, that get_funding_txo and
get_outputs_to_watch now clone the underlying data rather than returning
references.
The `ChannelKeys` object really isn't about keys at all anymore,
its all about signing. At the same time, we rename the type aliases
used in traits from both `ChanKeySigner` and `Keys` to just
`Signer` (or, in contexts where Channel isnt clear, `ChanSigner`).
Instead of `key_derivation_params` being a rather strange type, we
call it `channel_keys_id` and give it a generic 32 byte array. This
should be much clearer for users and also more flexible.
The only API change outside of additional derives is to change
the inner field in `DecodeError::Io()` to an `std::io::ErrorKind`
instead of an `std::io::Error`. While `std::io::Error` obviously
makes more sense in context, it doesn't support Clone, and the
inner error largely doesn't have a lot of value on its own.
ChannelManager::force_close_channel does not fail if a non-existing channel id is being passed, making it hard to catch from an API point of view.
Makes force_close_channel return in the same way close_channel does so the user calling the method with an unknown id can be warned.
This drops any direct calls to a generic `ChannelKeys::read()` and
replaces it with the new `KeysInterface::read_chan_signer()`. Still,
under the hood all of our own `KeysInterface::read_chan_signer()`
implementations simply call out to a `Readable::read()` implemention.
This adds a new method to the general cross-channel `KeysInterface`
which requires it to handle the deserialization of per-channel
signer objects. This allows the deserialization of per-channel
signers to have more context available, which, in the case of the
C bindings, includes the actual KeysInterface information itself.
There's no reason to have ChannelMonitor::write_for_disk instead of
just using the Writeable trait anymore. Previously, it was used to
differentiate with `write_for_watchtower`, but support for
watchtower-mode ChannelMonitors was never completed and the partial
bits were removed long ago.
This has the nice benefit of hitting the custom Writeable codepaths
in C bindings instead of trying to hit trait-generics paths.
This changes adds the genesis block hash as a BlockHash to the
NetworkGraph struct. Making the NetworkGraph aware allows the message
handler to validate the chain_hash for received messages. This change
also adds the hash value to the Writeable and Readable methods.
This takes the now-public `NetworkGraph` message handling functions
and splits them all into two methods - one which takes a required
Secp256k1 context and verifies signatures and one which takes only
the unsigned part of the message and does not take a Secp256k1
context.
This both clarifies the public API as well as simplifies it, all
without duplicating code.
Finally, this adds an assertion in the Router fuzzer to make sure
the constants used for message deserialization are correct.
This makes the public utility methods in `NetworkGraph` able to do
UTXO lookups ala `NetworkMsgHandler`'s `RoutingMessageHandler`
implementation, slightly simplifying the public interface.
We also take this opportunity to verify signatures before calling
out to UTXO lookups, under the "do actions in order of
cheapest-to-most-expensive to reduce DoS surface" principle.
It turns out (somewhat obviously) that expecting a fuzzer to
correctly build multiple signatures which verify against multiple
public keys in the same message was a bit too daunting, so we now
skip message signatures in routing messages.
We also take this opportunity to simplify the target itself somewhat,
avoiding reading public keys over and over and instead generating
routes to all the public keys that appeared in messages while running.
This adds a new command string in the chanmon_consistency fuzzer
which tests that, once all pending HTLCs are settled, at least one
side of a channel can still send funds.
While this should have caught the recent(ish) spec bug where
channels could get stuck, I did not attempt to reproduce said bug
with this patch.
In previous versions of related commits, the macros in
chanmon_consistency ended up blowing up rustc a bit resulting in
20+GB memory usage and long compile times. Shorter function bodies
by avoiding macros where possible fix this.
This should make it a bit easier for the fuzzer to hit any given
balance breakdown during run as well as tweaks the command strings
to be more bit-pattern friendly.
Instead of simply always considering a payment-send failure as
acceptable (and aborting fuzzing), we check that a payment send
failure is from a list of errors that we know we can hit, mostly
around maxing out our channel balance.
Critically, we keep going after hitting an error, as there's no
reason channels should get out of sync even if a send fails.
Helpful for debugging. I also included the change in the provide_preimage method
signature which will be used in an upcoming commit, because commit-wise it was
easier to combine the changes.
- The ChainMonitor should:
Whenever a new channel is added or updated, these updates
should be conveyed to the persister and persisted to disk.
Even if the update errors while it's being applied, the
updated monitor still needs to be persisted.
Given the chain::Watch interface is defined in terms of ChannelMonitor
and ChannelMonitorUpdateErr, move channelmonitor.rs from the ln module
to the chain module.
WatchEventProvider served as a means for replacing ChainWatchInterface.
However, it requires users to explicitly fetch WatchEvents, even if not
interested in them. Replace WatchEventProvider by chain::Filter, which
is an optional member of ChainMonitor. If set, interesting transactions
and output spends are registered such that blocks containing them can be
retrieved from a chain source in an efficient manner.
This is useful when the chain source is not a full node. For Electrum,
it allows for pre-filtered blocks. For BIP157/158, it serves as a means
to match against compact filters.
BlockNotifier was removed in the previous commit, thus ChainListener is
no longer needed. Instead, anything needing chain events should be
notified directly.
ChainMonitor's template Key parameter was meant to allow supporting
both local monitoring, where Key=OutPoint, and watchtowers, where Key=
(PublicKey, u32). Use OutPoint directly since the watchtower case will
not be supported this way.
ManyChannelMonitor was renamed chain::Watch in the previous commit. Use
a more concise name for an implementation that monitors the chain for
channel activity. Future work will parameterize the struct to allow for
different varieties of persistence. Thus, users usually will be able to
use ChainMonitor directly rather than implementing a chain::Watch that
wraps it.
Rename ManyChannelMonitor to chain::Watch and move to chain/mod.rs,
where chain-related interfaces live. Update the documentation for
clarity and to conform to rustdoc formatting.
ChainWatchInterface was intended as an interface for watching rather
than accessing the chain. Remove get_chain_utxo and add chain::Access
trait for this behavior. Wrap it with an Option in NetGraphMsgHandler in
order to simplify the error interface.
Use of ChainWatchInterface was replaced with WatchEvent in the previous
commit. Remove it from the parameterization of SimpleManyChannelMonitor
since it is no longer needed.
ChainListeners should be independent of each other, but in practice this
is not the case because ChainWatchInterface introduces a dependency
between them. Push ChainWatchInterface down into the ChainListener
implementations where needed. Update ChainListener's block_connected
method to take a slice of the form &[(usize, &Transaction)] where each
transaction is paired with its position within the block.
