This is useful when we wish to have a channel frozen for a specific
amount of blocks after its confirmation. This could also be done with an
absolute thaw height, but it does not suit cases where a strict block
delta needs to be enforced, as it's not possible to know for certain
when a channel will be included in the chain. To work around this, we
add a relative interpretation of the field, where if its value is below
500,000, then it's interpreted as a relative height. This approach
allows us to prevent further database modifications to account for a
relative thaw height.
Adds a new configuration flag to lnd that will keep keysend payments in
the accepted state. An application can then inspect the payment
parameters and decide whether to settle or cancel.
The on-the-fly inserted keysend invoices get a configurable expiry time.
This is a safeguard in case the application that should decide on the
keysend payments isn't active.
Avoids indexing the all-zeros pay addr, since it is still in use by
legacy keysend. Without this, the pay addr index will reject all but the
first keysend since they will be detected as duplicates within the set
id index.
SettleHodlInvoice and CancelInvoice both notifyClients after
notifyHodlSubscribers. This commit changes UpdateInvoice to follow the
same pattern so that we are consistent.
This was initially done as there were a few assertions throughout the
codebase requiring a channel's policy to be known. Now that these have
been addressed, we no longer need to store restored channels in the
graph, as their policies where incomplete anyway.
Modifies syncer.replyChanRangeQuery method to use the LastBlockHeight
method on the query. LastBlockHeight safely calculates the ending
block height and prevents an overflow of start_block + num_blocks.
Prior to this change, query messages that had a start_block +
num_blocks that overflows uint32_max would return zero results in the
reply message.
Tests are added to fix the bug and ensure proper start and end values
are supplied to the channel graph filter.
This fixes a decoding error when the list of short channel ids within a
QueryShortChanIDs message started with a zero sid.
BOLT-0007 specifies that lists of short channel ids should be sorted in
ascending order. Previously, this was checked within lnwire by comparing
two consecutive sids in the list, starting at the empty (zero) sid.
This meant that a list that started with a zero sid couldn't be decoded
since the first element would _not_ be greater than the last one
(namely: also zero).
Given that one can only check for ordering starting at the second
element, we add a check to ensure the proper behavior.
A unit test is also added to ensure no future regressions on this
behavior.
In this commit we add the ability to intercept forwarded htlc packets
straight from the RPC layer. The RPC layer handles a bidrectional stream
that comminucates to the client the intercepted packets and handles its
response by coordinating with the interceptable switch.
In this commit we implement a wrapper arround the switch, called
InterceptableSwitch. This kind of wrapper behaves like a proxy which
intercepts forwarded packets and allows an external interceptor to
signal if it is interested to hold this forward and resolve it
manually later or let the switch execute its default behavior.
This infrastructure allows the RPC layer to expose interceptor
registration API to the user and by that enable the implementation
of custom routing behavior.
As part of the preparation to the switch interceptor feature, this
function is changed to return error instead of error channel that
is closed automatically.
Returning an error channel has become complex to maintain and
implement when adding more asynchronous flows to the switch.
The change doesn't affect the current behavior which logs the
errors as before.
In this commit, we add an additional defense against starting up with an
invalid SCB state. With this commit, we'll now fail to start up if we're
unable to update or read the existing SCB state from disk. This will
prevent an lnd node from starting up with an invalid SCB file, an SCB
file it can't decrypt, or an SCB left over from another node.
In this commit, we fix a bug that could possibly cause a user's on disk
back up file to be wiped out, if they ever started _another_ lnd node
with different channel state. To remedy this, before we swap out the
channel state with what's on disk, we'll first read out the contents of
the on-disk SCB file and _combine_ that with what we have in memory.
Fixes#4377
This commit changes the verification of our code against the spec test
vectors to use a more black box approach. It exercises the channel state
machine via its external interface as much as possible, making this test
more robust. A consequence of this is that the test now runs from the
'root' data from which the test vectors are also derived, meaning that
more code is covered too.
Running from the root data is also a preparation for _producing_ test
vectors for the new anchor commitment format. This will be a matter of
changing the channel type and recording the produced commitment and htlc
txes.
Previously the success transaction was skipped during verification. With
this commit, the proper preimage insertion is carried out, allowing the
success tx to be checked too.
Introduces a new chancloser package which exposes a ChanCloser
struct that handles the cooperative channel closure negotiation
and is meant to replace chancloser.go in the lnd package. Updates
all references to chancloser.go to instead use chancloser package.
