Elias Rohrer [Mon, 11 Sep 2023 11:50:10 +0000 (13:50 +0200)]
Probe up to second-to-last hop if last was provided by route hint
If the last hop was provided by route hint we assume it's not an announced channel.
If furthermore only a single route hint is provided we refrain from probing through
all the way to the end and instead probe up to the second-to-last channel.
Optimally we'd do this not based on above mentioned assumption but
rather by checking inclusion in our network graph. However, we don't
have access to our graph in `ChannelManager`.
Elias Rohrer [Mon, 28 Aug 2023 13:03:04 +0000 (15:03 +0200)]
Add preflight probing capabilities
We add a `ChannelManager::send_preflight_probes` method that can be used
to send pre-flight probes given some [`RouteParameters`]. Additionally,
we add convenience methods in for spontaneous probes and send pre-flight
probes for a given invoice.
As pre-flight probes might take up some of the available liquidity, we
here introduce that channels whose available liquidity is less than the
required amount times
`UserConfig::preflight_probing_liquidity_limit_multiplier` won't be used
to send pre-flight probes.
This commit is a more or less a carbon copy of the pre-flight
probing code recently added to LDK Node.
Elias Rohrer [Tue, 12 Sep 2023 13:51:37 +0000 (15:51 +0200)]
Include `maybe_announced` field in `RouteHop`
When sending preflight probes, we want to exclude last hops that are
possibly announced. To this end, we here include a new field in
`RouteHop` that will be `true` when we either def. know the hop to be
announced, or, if there exist public channels between the hop's
counterparties that this hop might refer to (i.e., be an alias for).
Elias Rohrer [Mon, 28 Aug 2023 11:57:29 +0000 (13:57 +0200)]
Set `payment_secret` when sending probes
Previously, we'd leave the payment secret field empty while sending
probes, which resulted in having them rejected
with `(PERM|invalid_onion_payload)` by Eclair nodes.
In order to mitigate the issue, we just set a random payment secret.
Matt Corallo [Wed, 5 Jul 2023 16:15:59 +0000 (16:15 +0000)]
Test monitor update completion actions on pre-startup completion
This adds a test for monitor update actions being completed on
startup if a monitor update completed "while we were shut down"
(or, really, the manager didn't get persisted after the update
completed).
Matt Corallo [Mon, 21 Aug 2023 18:44:22 +0000 (18:44 +0000)]
Update tests to test re-claiming of forwarded HTLCs on startup
Because some of these tests require connecting blocks without
calling `get_and_clear_pending_msg_events`, we need to split up
the block connection utilities to only optionally call
sanity-checks.
`expect_payment_forwarded` takes a bool to indicate that the
inbound channel on which we received a forwarded payment has been
closed, but then ignores it in favor of looking at the fee in the
event. While this is generally correct, in cases where we process
an event after a channel was closed, which was generated before a
channel closed this is incorrect.
Instead, we examine the bool we already passed and use that.
Matt Corallo [Thu, 7 Sep 2023 02:22:52 +0000 (02:22 +0000)]
Block the mon update removing a preimage until upstream mon writes
When we forward a payment and receive an `update_fulfill_htlc`
message from the downstream channel, we immediately claim the HTLC
on the upstream channel, before even doing a `commitment_signed`
dance on the downstream channel. This implies that our
`ChannelMonitorUpdate`s "go out" in the right order - first we
ensure we'll get our money by writing the preimage down, then we
write the update that resolves giving money on the downstream node.
This is safe as long as `ChannelMonitorUpdate`s complete in the
order in which they are generated, but of course looking forward we
want to support asynchronous updates, which may complete in any
order.
Thus, here, we enforce the correct ordering by blocking the
downstream `ChannelMonitorUpdate` until the upstream one completes.
Like the `PaymentSent` event handling we do so only for the
`revoke_and_ack` `ChannelMonitorUpdate`, ensuring the
preimage-containing upstream update has a full RTT to complete
before we actually manage to slow anything down.
Matt Corallo [Thu, 31 Aug 2023 19:06:34 +0000 (19:06 +0000)]
Clean up test handling of resending responding commitment_signed
When we need to rebroadcast a `commitment_signed` on reconnect in
response to a previous update (ie not one which contains any
updates) we previously hacked in support for it by passing a `-1`
for the number of expected update_add_htlcs. This is a mess, and
with the introduction of `ReconnectArgs` we can now clean it up
easily with a new bool.
Verify channel-monitor processes blocks with skipped best_block
This can happen due to races b/w client's call to block_connect
and adding newly created channel-monitor to chain-monitor using
watch_channel in funding_created.
Duncan Dean [Wed, 26 Jul 2023 09:20:08 +0000 (11:20 +0200)]
Introduce `ChannelPhase` enum
We introduce the `ChannelPhase` enum which will contain the different
channel structs wrapped by each of its variants so that we can place
these within a single `channel_by_id` map in `peer_state` in the
following commits. This will reduce the number of map lookup operations
we need to do in `ChannelManager`'s various methods. It will also make
certain channel counting logic easier to reason about with less risk of
forgetting to modify logic when new channels structs are introduced for
V2 channel establishment.
Replace a constant three retry attempts for BOLT 12 invoice payments
with a retry strategy specified when creating a pending outbound
payment. This is configured by users in a later commit when constructing
an InvoiceRequest or a Refund.
An upcoming commit requires serializing Retry, so use a type with a
fixed byte length. Otherwise, using eight bytes to serialize a usize
would fail to read on 32-bit machines.
Add a send_payment_for_bolt12_invoice method to OutboundPayments for
initiating payment of a BOLT 12 invoice. This will be called from an
OffersMessageHandler, after which any retries are handled using the
Retryable logic.
Consolidate the creation and insertion of onion_session_privs to the
PendingOutboundPayment::Retryable arm. In an upcoming commit, this
method will be reused for an initial BOLT 12 invoice payment. However,
onion_session_privs are created using a different helper.
Jeffrey Czyz [Wed, 30 Aug 2023 17:01:15 +0000 (12:01 -0500)]
Add PendingOutboundPayment::InvoiceReceived
When a BOLT 12 invoice has been received, a payment attempt is made and
any errors result in abandoning the PendingOutboundPayment. This results
in generating at PaymentFailed event, which has a PaymentHash. Thus,
when receiving an invoice, transition from AwaitingInvoice to a new
InvoiceReceived state, the latter of which contains a PaymentHash such
the abandon_payment helper can still be used.
When a BOLT 12 invoice has been requested, in order to guarantee
invoice payment idempotency the future payment needs to be tracked. Add
an AwaitingInvoice variant to PendingOutboundPayment such that only
requested invoices are paid only once. Timeout after a few timer ticks
if a request has not been received.
When an invoice is requested but either receives an error or never
receives a response, surface an event to indicate to the user that the
corresponding future payment has failed.
When receiving a BOLT 12 invoice originating from either an invoice
request or a refund, the invoice should only be paid once. To accomplish
this, require that the invoice includes an encrypted payment id in the
payer metadata. This allows ChannelManager to track a payment when
requesting but prior to receiving the invoice. Thus, it can determine if
the invoice has already been paid.
Jeffrey Czyz [Thu, 24 Aug 2023 20:16:53 +0000 (15:16 -0500)]
Add an encryption key to ExpandedKey for Offers
Metadata such as the PaymentId should be encrypted when included in an
InvoiceRequest or a Refund, as it is user data and is exposed to the
payment recipient. Add an encryption key to ExpandedKey for this purpose
instead of reusing offers_base_key.
InvoiceRequest::verify_and_respond_using_derived_keys takes a payment
hash. To avoid generating one for invoice requests that ultimately
cannot be verified, split the method into one for verifying and another
for responding.
Matt Corallo [Mon, 28 Aug 2023 18:39:04 +0000 (18:39 +0000)]
Drop dep `tokio`'s `io-util` feat as it broke MSRV and isn't useful
We use `tokio`'s `io-util` feature to provide the
`Async{Read,Write}Ext` traits, which allow us to simply launch a
read future or `poll_write` directly as well as `split` the
`TcpStream` into a read/write half. However, these traits aren't
actually doing much for us - they are really just wrapping the
`readable` future (which we can trivially use ourselves) and
`poll_write` isn't doing anything for us that `poll_write_ready`
can't.
Similarly, the split logic is actually just `Arc`ing the
`TcpStream` and busy-waiting when an operation is busy to prevent
concurrent reads/writes. However, there's no reason to prevent
concurrent access at the stream level - we aren't ever concurrently
writing or reading (though we may concurrently read and write,
which is fine).
Worse, the `io-util` feature broke MSRV (though they're likely to
fix this upstream) and carries two additional dependencies (only
one on the latest upstream tokio).
projects / rust-lightning / log