This gives much better errors, and allows us to return the peer id.
Closes: #37
Reported-by: Glenn Willen
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is important when we put payments in the database: they need to be
updated atomically as the HTLC is.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is important when we put payments in the database: they need to be
updated atomically as the HTLC is.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We create a logging object when we connect, then carry it through. If
it comes from the database, we just use the peerid as the log prefix.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We stopped automatically retransmitting locally-generated add/removes
after a reconnect, but this breaks the "pay" interface as it stands.
The correct solution to this is to make the pay interface idempotent:
you can trigger it as many times as you want and it will only succeed
once.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It's not currently encrypted, but at least you get some idea now why
an HTLC failed. We (ab)use HTTP error codes for the moment.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
I originally overloaded struct htlc for this, as they go through the
same states, but separating them turned out to be clearer.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This makes more sense eventually: we may know the network addresses of
many peers, not just those we're connecting to. So keep a mapping, and
update it when we successfully connect outwards.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
1. Fix #ifdef DEBUG code in signature.c so it compiles.
2. Don't set peer->closing.our_script in queue_pkt_close_shutdown: it's
assigned in caller already.
3. Wrap setting of htlc's rval in set_htlc_rval() function.
4. Log where we were when unexpected packet comes in.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
More of a pure allocator, for when we load peers from db. Also moves
shachain_init out of secrets and into new_peer where it logically
belongs.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This gives us a clear way to indicate "invalid", and also sqlite3 stores
signed 64-bit numbers, so it's clearer this way.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is dumb, since one side will never succeed. But in future when
there is a method for nodes to broadcast their public address (or send
their address inline to connected nodes), either side should try to
connect.
Importantly though, there are places which will queue packets at
various times (eg. HTLC timeout), so we need to clear the queue just
before re-transmitting, not when disconnecting.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
To do this we keep an order counter so we know how to retransmit. We
could simply keep old packets, but this is a little clearer for now.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We no longer need it anywhere. This simplifies things to the point where
we might as well just not include dust outputs as we go, rather than
explicitly removing them, which gets rid of remove_dust.c as well.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Similar to the way we derive which outputs are which for old transactions
we steal, we derive them even for their current transaction.
We keep track of this information in peer->closing.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We want to stop keeping old commitment information (except the minimal
txid to commitment-number mapping). One place we currently use it is
after sending a commitment signature, and before we've received the
revocation for the old commitment. For this duration, there are two
valid commitment transactions.
So we store "their_prev_revocation_hash" explicitly for this duration.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It's a data-leak to send ack before we have verified identity of peer.
Plus, we can't send it until we know which peer it is, anyway!
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
And use this to resolve old transactions by comparing outputs with
HTLCs.
Rather than remembering the output ordering for every one of their
previous commitment transactions, we just remember the commitment
number for each commitment txid, and when we see it, derive all the
HTLC scriptpubkeys and the to-us and to-them scriptpubkeys, and figure
out which is which.
This avoids us having to save information on disk, except for the
txid->commitment-number mapping (and the shachain).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This makes it explicit, which is better for storing in a database (before
it was just what watch callback, plus peer->local.mindepth).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Move other logic into caller: it grew this way because we used to have
a centralized "state" machine which knew nothing of these internal
details. But now we want to re-queue packets on reconnect, we really
want these routines to be idempotent.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Not separate "locally-offered" and "remotely-offered" ones; we can
distinguish them by htlc->state now.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Since we only care about the latest commits, we can simply associate a
state with each HTLC, rather than using queues of HTLCs associated
with each commitment transaction.
This works far better in the context of a database.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
From doing a code walkthrough with Christian Decker; unnecessary const in
bitcoin/tx.c, an erroneous FIXME, a missing comment, and an unused struct.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is the command an actual user would use: it figures out the fee
and route, and pays it if it can.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
If a block triggers two peers to close, we ran io_break() on both of them; the
second overrode the first and we didn't end up freeing that one.
Rather than chase such bugs in future, simply iterate to see if any
peers need freeing.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Note that the base fee is in millisatoshi, the proportional fee is
in microsatoshi per satoshi. ie. 1,000,000 means charge 1 satoshi for
every satoshi carried.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Most HTLCs we offer are triggered by an incoming HTLC from a different
peer. Save this "source" htlc, so we can fail/fulfill it when we
fail/fulfill this one.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
No more copies!
I tried changing the cstate->side[].htlcs to htlc_map rather than a
simple pointer array, but we rely on those array indices heavily for
permutation mapping, and it turned into a major rewrite (especially
for the steal case).
Eventually, we're going to want to reconstruct the commit info for
older commit txs rather than keeping all the permutation and
per-commit-info HTLC information in memory, so we can do the work
then.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It's a more logical name, and a more logical place. We change
"funding" to "channel" in the remaining exposed symbols, too.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is the more normal case; find by ID. The low-level json commands are
really just for testing.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The protocol still supports both, but we now only support blocks.
It's hard to do risk management with timeouts in seconds, given block
variance. This is also signficantly simpler, as HTLC timeouts are
always fired in response to blocks, not wall-clock times.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We need to know when changes are fully committed by both sides:
1) For their HTLC_ADDs, this is when we can fulfill/fail/route.
2) For their HTLC_FAILs, this is when we can fail incoming.
For HTLC_FULFULL we don't need to wait: as soon as we know the preimage
we can propogate it.
For the moment, we simply log and assert; acting on it comes later.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We've been stuffing these into sha256s, but they're actually nonces.
Create a new structure for that for clarity.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell