We used to send our tx_sigs before we got to channeld existing. We
changed how this worked so that multifundchannel could live, but failed
to clean up the logic of what "having a psbt around" means wrt channeld
and messaging our peer.
The general idea is that we want to send `tx_signatures` to our peer on
reconnect until they've sent us `funding_locked`.
Note that it's an error to
- send `funding_locked` without having sent `tx_signatures`
- send `tx_signatures` after sending `funding_locked`
We use the 'finalized' state of the peer's inputs/outputs to help signal
where we are in receiving their sigs -- but this doesn't work at all for
opens where the peer doesn't contribute inputs at all.
This isn't really a huge deal, but it does mean that if we receive a
peer's `tx_sigs` more than once (will happen for a reconnect before
`funding_locked`), then we'll issue a notification about receiving their
sigs multiple times. /shrug
Prior to this patch update, we expected a client to call
`openchannel_signed` before checking for peer's tx-sigs messages on the
wire.
When moving to a 'multifundchannel' approach, we'll need to be able to
collect sigs from our peers before sending our tx_sigs message. There's
no strict ordering on when tx-sigs messages are sent/received, so this
is fine.
To do this, we go ahead and start up channeld as soon as
commitment_sigs are secured, so that we process incoming tx-sigs from
our peers as soon as we get them.
We're about to totally upset the order that sigs are set on our PSBTs
for new channel opens, making it such that our peer's sigs may arrive
before ours do.
We can no longer rely on the 'set witness means this is our input' since
there's no guarantee that our input sigs have been added yet, so we
check the serial_id and only set the stack on their (odd) inputs.
Instead of a boutique message, use a "real" channel_announcement for
private channels (with fake sigs and pubkeys). This makes it far
easier for gossmap to handle local channels.
Backwards compatible update, since we update old stores.
We also fix devtools/dump-gossipstore to know about the tombstone markers.
Since we increment our channel_announce count for local channels now,
the stats in the tests changed too.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
There's a few structs/wire calls that only exist under experimental features.
These were in a common file that was shared/used a bunch of places but
this causes problems. Here we move one of the problematic methods back
into `openingd`, as it's only used locally and then isolate the
references to the `witness_stack` in a new `common/psbt_internal` file.
This lets us remove the iff EXP_FEATURES inclusion switches in most of
the Makefiles.
...right time.
We re-send the tx_sigs on start/init/reconnect until we've gotten a
funding_locked from our peer. We also build it in channeld now, instead
of in dualopend, and don't pass in a message for them anymore
We need the PSBT to create the finalized tx from once the peer's
tx_signatures are received. Since we're passing the PSBT, we no longer
need the secondary message to be passed, as it was derived from the
PSBT.
Also removes now unused witness serialization code
We had one report of this, and then Eugene and Roasbeef of Lightning
Labs confirmed it; they saw misordered HTLCs on reconnection too.
Since we didn't enforce this when we receive HTLCs, we never noticed :(
Fixes: #3920
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Fixed: Protocol: fixed retransmission order of multiple new HTLCs (causing channel close with LND)
We didn't care, but other implementations (particularly lnd) do. And it
does violate the spec.
(We need to use skip not xfail on the test which catches this, since
xfail doesn't seem to stop errors reported by cleanup)
(Includes Christian's typo fix!)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
1. Rename memleak_enter_allocations to memleak_find_allocations.
2. Unify scanning for pointers into memleak_remove_region / memleak_remove_pointer.
3. Document the functions.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
dual funding needs the max-witness-len and utxo fields set for every
input. we should add them when we create a 'fundpsbt', so that every
psbt that c-lightning generates is dual-funding ready
v2 of channel establishment, in the accpeter case, now sends 2 messages
to our peer after saving the information to disk (our commitment
signatures and our funding transaction signatures)
v2 channel open uses a different method to derive the channel_id, so now
we save it to the database so that we dont have to remember how to
derive it for each.
includes a migration for existing channels
There's a lot of it, and it means we can't `make check-source` on
these files.
Also bring bolt quotes up-to-date.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This avoids overwriting the ones in git, and generally makes things neater.
We have convenience headers wire/peer_wire.h and wire/onion_wire.h to
avoid most #ifdefs: simply include those.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We're going to make experimental versions of these completely separate files.
Also remove the dependency on the Makefile itself: it simply causes
unnecessary churn. We can always force-rebuild when we change a rule.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We create ALL_PROGRAMS, ALL_TEST_PROGRAMS, ALL_C_SOURCES and
ALL_C_HEADERS. Then the toplevel Makefile knows which are
autogenerated (by wildcard), so it can have all the rules to clean
them or check the source as necessary.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Fixes: #3608
Changelog-Changed: protocol: Ignore (and log as "unusual") repeated `WIRE_CHANNEL_REESTABLISH` messages, to be compatible with buggy peer software that sometimes does this.
Note that other directories were explicitly depending on the generated
file, instead of relying on their (already existing) dependency on
$(LIGHTNINGD_HSM_CLIENT_OBJS), so we remove that.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This means some files get renamed, and I took the opportunity to clarify
our naming (the *d* is important!)
1. channeld/channel_wire.csv -> channeld/channeld_wire.csv
2. channeld/gen_channel_wire.h -> channeld/channeld_wiregen.h
3. enum channel_wire_type -> enum channeld_wire
4. WIRE_CHANNEL_FUNDING_DEPTH -> WIRE_CHANNELD_FUNDING_DEPTH.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This also means we subtract 660 satoshis more everywhere we subtract
the base fee (except for mutual close, where the base fee is still
used).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is best done by passing `struct bitcoin_signature` around instead
of raw signatures. We still save raw sigs to the db, and of course the
wire protocol uses them.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
HTLC fees increase (larger weight), and the fee paid by the opener
has to include the anchor outputs (i.e. 660 sats).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Includes:
psbt: Use renamed functions for new wally version
psbt: Set the transaction directly to avoid script workarounds
psbt: Use low-S grinding when computing signatures
tx: Use wally_tx_clone from libwally now that its exported
Signed-off-by: Jon Griffiths <jon_p_griffiths@yahoo.com>
The main change here is that the previously-optional open/accept
fields and reestablish fields are now compulsory (everyone was
including them anyway). In fact, the open/accept is a TLV
because it was actually the same format.
For more details, see lightning-rfc/f068dd0d8dfa5ae75feedd99f269e23be4777381
Changelog-Removed: protocol: support for optioned form of reestablish messages now compulsory.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
niftynei
Rusty Russell
Matt Whitlock
ZmnSCPxj jxPCSnmZ
Jon Griffiths