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channel: Queue a channel_update to the peer upon funding_locked 

Signed-off-by: Christian Decker <decker.christian@gmail.com>
ppa-0.6.1
Christian Decker 7 years ago
committed by Rusty Russell
parent
9cfd09dc4a
commit
7aa13cc949
2 changed files with 79 additions and 64 deletions
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  1. 96
      channeld/channel.c
  2. 47
      tests/test_lightningd.py

96
channeld/channel.c
View File

@ -298,11 +298,54 @@ static void enqueue_peer_msg(struct peer *peer, const u8 *msg TAKES)
msg_enqueue(&peer->peer_out, msg);
}
/* Send a temporary `channel_announcement` and `channel_update`. These
* are unsigned and mainly used to tell gossip about the channel
* before we have reached the `announcement_depth`, not being signed
* means they will not be relayed, but we can already rely on them for
* our own outgoing payments */
static u8 *create_channel_update(const tal_t *ctx,
struct peer *peer, bool disabled)
{
u32 timestamp = time_now().ts.tv_sec;
u16 flags;
u8 *cupdate, *msg;
/* Identical timestamps will be ignored. */
if (timestamp <= peer->last_update_timestamp)
timestamp = peer->last_update_timestamp + 1;
peer->last_update_timestamp = timestamp;
/* Set the signature to empty so that valgrind doesn't complain */
secp256k1_ecdsa_signature *sig =
talz(tmpctx, secp256k1_ecdsa_signature);
flags = peer->channel_direction | (disabled << 1);
cupdate = towire_channel_update(
tmpctx, sig, &peer->chain_hash,
&peer->short_channel_ids[LOCAL], timestamp, flags,
peer->cltv_delta, peer->conf[REMOTE].htlc_minimum_msat,
peer->fee_base, peer->fee_per_satoshi);
msg = towire_hsm_cupdate_sig_req(tmpctx, cupdate);
if (!wire_sync_write(HSM_FD, msg))
status_failed(STATUS_FAIL_HSM_IO,
"Writing cupdate_sig_req: %s",
strerror(errno));
msg = wire_sync_read(tmpctx, HSM_FD);
if (!msg || !fromwire_hsm_cupdate_sig_reply(ctx, msg, &cupdate))
status_failed(STATUS_FAIL_HSM_IO,
"Reading cupdate_sig_req: %s",
strerror(errno));
return cupdate;
}
/**
* Add a channel locally and send a channel update to the peer
*
* Send a local_add_channel message to gossipd in order to make the channel
* usable locally, and also tell our peer about our parameters via a
* channel_update message. The peer may accept the update and use the contained
* information to route incoming payments through the channel. The
* channel_update is not preceeded by a channel_announcement and won't make much
* sense to other nodes, so we don't tell gossipd about it.
*/
static void send_temporary_announcement(struct peer *peer)
{
u8 *msg;
@ -319,6 +362,11 @@ static void send_temporary_announcement(struct peer *peer)
peer->conf[REMOTE].htlc_minimum_msat, peer->fee_base,
peer->fee_per_satoshi);
wire_sync_write(GOSSIP_FD, take(msg));
/* Tell the other side what parameters we expect should they route
* through us */
msg = create_channel_update(NULL, peer, false);
enqueue_peer_msg(peer, take(msg));
}
static void send_announcement_signatures(struct peer *peer)
@ -383,44 +431,6 @@ static void send_announcement_signatures(struct peer *peer)
enqueue_peer_msg(peer, take(msg));
}
static u8 *create_channel_update(const tal_t *ctx,
struct peer *peer, bool disabled)
{
u32 timestamp = time_now().ts.tv_sec;
u16 flags;
u8 *cupdate, *msg;
/* Identical timestamps will be ignored. */
if (timestamp <= peer->last_update_timestamp)
timestamp = peer->last_update_timestamp + 1;
peer->last_update_timestamp = timestamp;
/* Set the signature to empty so that valgrind doesn't complain */
secp256k1_ecdsa_signature *sig =
talz(tmpctx, secp256k1_ecdsa_signature);
flags = peer->channel_direction | (disabled << 1);
cupdate = towire_channel_update(
tmpctx, sig, &peer->chain_hash,
&peer->short_channel_ids[LOCAL], timestamp, flags,
peer->cltv_delta, peer->conf[REMOTE].htlc_minimum_msat,
peer->fee_base, peer->fee_per_satoshi);
msg = towire_hsm_cupdate_sig_req(tmpctx, cupdate);
if (!wire_sync_write(HSM_FD, msg))
status_failed(STATUS_FAIL_HSM_IO,
"Writing cupdate_sig_req: %s",
strerror(errno));
msg = wire_sync_read(tmpctx, HSM_FD);
if (!msg || !fromwire_hsm_cupdate_sig_reply(ctx, msg, &cupdate))
status_failed(STATUS_FAIL_HSM_IO,
"Reading cupdate_sig_req: %s",
strerror(errno));
return cupdate;
}
/* Tentatively create a channel_announcement, possibly with invalid
* signatures. The signatures need to be collected first, by asking
* the HSM and by exchanging announcement_signature messages. */

47
tests/test_lightningd.py
View File

@ -1135,11 +1135,11 @@ class LightningDTests(BaseLightningDTests):
def test_pay(self):
l1, l2 = self.connect()
chanid = self.fund_channel(l1, l2, 10**6)
# Wait for route propagation.
self.wait_for_routes(l1, [chanid])
sync_blockheight([l1, l2])
inv = l2.rpc.invoice(123000, 'test_pay', 'description')['bolt11']
before = int(time.time())
@ -1311,7 +1311,9 @@ class LightningDTests(BaseLightningDTests):
wait_for(lambda: len(l1.getactivechannels()) == 2)
wait_for(lambda: len(l2.getactivechannels()) == 2)
billboard = l1.rpc.listpeers(l2.info['id'])['peers'][0]['channels'][0]['status']
assert billboard == ['CHANNELD_NORMAL:Funding transaction locked. Channel announced.']
# This may either be from a local_update or an announce, so just
# check for the substring
assert 'CHANNELD_NORMAL:Funding transaction locked.' in billboard[0]
# This should return with an error, then close.
self.assertRaisesRegex(ValueError,
@ -1918,8 +1920,8 @@ class LightningDTests(BaseLightningDTests):
# Now, this will get stuck due to l1 commit being disabled..
t = self.pay(l1, l2, 100000000, async=True)
assert len(l1.getactivechannels()) == 1
assert len(l2.getactivechannels()) == 1
assert len(l1.getactivechannels()) == 2
assert len(l2.getactivechannels()) == 2
# They should both have commitments blocked now.
l1.daemon.wait_for_log('=WIRE_COMMITMENT_SIGNED-nocommit')
@ -2346,6 +2348,7 @@ class LightningDTests(BaseLightningDTests):
bitcoind.generate_block(1)
wait_forget_channels(l2)
@unittest.skipIf(not DEVELOPER, "DEVELOPER=1 needed to speed up gossip propagation, would be too long otherwise")
def test_gossip_jsonrpc(self):
l1, l2 = self.connect()
self.fund_channel(l1, l2, 10**6)
@ -2354,21 +2357,22 @@ class LightningDTests(BaseLightningDTests):
assert not l1.daemon.is_in_log('peer_out WIRE_ANNOUNCEMENT_SIGNATURES')
# Channels should be activated locally
wait_for(lambda: [c['active'] for c in l1.rpc.listchannels()['channels']] == [True])
wait_for(lambda: len(l1.rpc.listchannels()['channels']) == 2)
wait_for(lambda: len(l2.rpc.listchannels()['channels']) == 2)
# Make sure we can route through the channel, will raise on failure
l1.rpc.getroute(l2.info['id'], 100, 1)
# Outgoing should be active, but not public.
channels = l1.rpc.listchannels()['channels']
assert len(channels) == 1
assert channels[0]['active'] is True
assert channels[0]['public'] is False
channels1 = l1.rpc.listchannels()['channels']
channels2 = l2.rpc.listchannels()['channels']
channels = l2.rpc.listchannels()['channels']
assert len(channels) == 1
assert channels[0]['active'] is True
assert channels[0]['public'] is False
assert [c['active'] for c in channels1] == [True, True]
assert [c['active'] for c in channels2] == [True, True]
# The incoming direction will be considered public, hence check for out
# outgoing only
assert len([c for c in channels1 if not c['public']]) == 2
assert len([c for c in channels2 if not c['public']]) == 2
# Now proceed to funding-depth and do a full gossip round
l1.bitcoin.generate_block(5)
@ -2516,13 +2520,12 @@ class LightningDTests(BaseLightningDTests):
def count_active(node):
chans = node.rpc.listchannels()['channels']
active = [c for c in chans if c['active']]
print(len(active), active)
return len(active)
# Channels should be activated
wait_for(lambda: count_active(l1) == 4)
wait_for(lambda: count_active(l2) == 4)
wait_for(lambda: count_active(l3) == 5) # 4 public + 1 local
wait_for(lambda: count_active(l3) == 6) # 4 public + 2 local
# l1 restarts and doesn't connect, but loads from persisted store
l1.restart()
@ -2538,7 +2541,7 @@ class LightningDTests(BaseLightningDTests):
wait_for(lambda: count_active(l1) == 2)
wait_for(lambda: count_active(l2) == 2)
wait_for(lambda: count_active(l3) == 3) # 2 public + 1 local
wait_for(lambda: count_active(l3) == 4) # 2 public + 2 local
# We should have one local-only channel
def count_non_public(node):
@ -2549,17 +2552,17 @@ class LightningDTests(BaseLightningDTests):
# The channel l3 -> l4 should be known only to them
assert count_non_public(l1) == 0
assert count_non_public(l2) == 0
wait_for(lambda: count_non_public(l3) == 1)
wait_for(lambda: count_non_public(l4) == 1)
wait_for(lambda: count_non_public(l3) == 2)
wait_for(lambda: count_non_public(l4) == 2)
# Finally, it should also remember the deletion after a restart
l3.restart()
l4.restart()
wait_for(lambda: count_active(l3) == 3) # 2 public + 1 local
wait_for(lambda: count_active(l3) == 4) # 2 public + 2 local
# Both l3 and l4 should remember their local-only channel
wait_for(lambda: count_non_public(l3) == 1)
wait_for(lambda: count_non_public(l4) == 1)
wait_for(lambda: count_non_public(l3) == 2)
wait_for(lambda: count_non_public(l4) == 2)
def ping_tests(self, l1, l2):
# 0-byte pong gives just type + length field.
@ -3032,6 +3035,7 @@ class LightningDTests(BaseLightningDTests):
chanid = self.fund_channel(l1, l2, 10**6)
self.wait_for_routes(l1, [chanid])
sync_blockheight([l1, l2])
amt = 200000000
inv = l2.rpc.invoice(amt, 'test_htlc_in_timeout', 'desc')['bolt11']
@ -4096,6 +4100,7 @@ class LightningDTests(BaseLightningDTests):
# Now make sure an HTLC works.
# (First wait for route propagation.)
self.wait_for_routes(l1, [chanid])
sync_blockheight([l1, l2])
# Make payments.
self.pay(l1, l2, 200000000)

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