A PSBT funding flow consists of multiple steps. We add new RPC
messages that can trigger the underlying state machine to transition
to a new state. We also add new response messages that tell the
API user what the current state is.
This commit extends the RPC interface with GetNodeMetrics will contain
all graph node metrics in the future. Currently only holds betweennes
centrality per node.
The pending closing channels field was present to cover an edge case
where coperatively closed channels were closed before upgrade and
confirmed after the upgrade. This commit deprecates the field and adds
a warning log to cover these edge cases.
As frozen channels can only be created via the non-default channel
assembler, we extend both the ShimIntent and CannedAssembler to also
accept and expose this new channel status along with the thaw height.
Preparation for anchor resolver. The recovered anchor amount should
still be included in the pending channel report even after it has been
resolved.
This also fixes an existing bug that in some cases caused the recovered
amount from an htlc resolver not to be included in the total.
This change adds a set of errors to the peer struct returned by list
peers. A latest error boolean is added to allow for more succinct
default lncli responses.
This commit adds each channel's short chan id to the `feereport` rpc.
Without this, it can be tedious to lookup more info about a particular
channel since most rpcs only accept short chan ids and not channel
points. For instance, now one can take a channel id from `feereport` and
look it up directly via `getchaninfo` to examine the policy in more
detail.
The synchronous call to get all channel backups also include
channels that are pending at the moment of the call. A previous
commit added pending channels to the file based backup as well. So
this is the last backup method that needs to be adjusted to also
contain unconfirmed channels.
This change instructs the REST proxy server to overwrite its default
JSON marshaler settings. That allows us to set EmitDefaults to true
which will result in all JSON fields returned in REST responses to
be fully populated, even if their values are falsey.
This commit adds PendingOpenChannel to SubscribeChannelEvents stream in
the gRPC API.
This is useful for keeping track of channel openings that Autopilot does.
It can also be used for the non-initator side of a channel opening to keep
track of channel openings.
Returning from the sendPayments method closes the underlying stream, so
we would risk payments still being in flight when returning.
We add the running goroutines to a waitgroup, such that we can wait for
them all to exit before exiting and closing the stream.
In case an error is encountered in the process, we will return directly,
which will close the `reqQuit` channel and prompt the gorpoutines to
shut down.
This commit fixes a problem that could arise when handling a continuous
stream of payIntents. We would risk the client sending a set of payment
intents and closing the stream, but we wouldn't be sure the sendLoop had
read all messages on the `payChan` before exiting with the nil error
from the `errChan`.
Instead, we close the `payChan` to indicate that no more payments are
going to be received.
This commit fixes a potential issue in the bidirectional sendPayment
case, where multiple goroutines could be sending on an errChan with
buffer 1. Instead we select on default as well, as it is enough to
handle the first error that was received.
Intead of checking for shutdown in the receive loop, we let the sendLoop
handle it, as it can return the error directly. This works since the
returning sendLoop will trigger a close of the `reqQuit` channel, which
will ensure the receive loop exits.
The default was increased for the main sendpayment RPC in commit
d3fa9767a9729756bab9b4a1121344b265410b1a. This commit sets the
same default for QueryRoutes, routerrpc.SendPayment and
router.EstimateRouteFee.
In this commit, we implement the currently defined transition methods
for the new `FundingStateStep` method. At this point, we're now able to
serve the "responder" of the externally initiated channel funding flow
by being able to register and cancel a funding flow according to its
expected pending channel ID.
In this commit, we update the `OpenChannel` method to observe the new
`funding_shim` field in the main open channel request. If this is
specified, and is a channel point shim, then we'll create a custom
`chanfunding.Assembler` for the wallet to use in place of the regular
funding workflow.
With this commit, the "initiator" of an external funding flow can now
delegate the remainder of the channel funding workflow to lnd.
In this commit, we start to expose some of the new external funding
functionality over the RPC interface.
First, we add a new `funding_shim` field to the regular `OpenChannel`
method. This can be used by a caller to express that certain parameters
of the funding flow have already been negotiated outside the protocol,
and should be used instead. For example, a shim can be provided to use a
particular key for the commitment key (ideally cold) rather than use one
this is generated by the wallet as normal, or signal that signing will
be carried out in an interactive manner (PSBT based).
Next, we add a brand new method: `FundingStateStep`. FundingStateStep is
an advanced funding related call that allows the caller to either
execute some preparatory steps for a funding workflow, or manually
progress a funding workflow. The primary way a funding flow is
identified is via its pending channel ID. As an example, this method can
be used to specify that we're expecting a funding flow for a particular
pending channel ID, for which we need to use specific parameters.
Alternatively, this can be used to interactively drive PSBT signing for
funding for partially complete funding transactions.
The new transition methods (funding state machine modifiers) in this
commit allow a party to register a funding intent that should be used
for a specified incoming pending channel ID. The "responder" to the
external channel flow should use this to prep lnd to be able to handle
the channel flow properly.
