Millisatoshi's inner representation expected to be an int, otherwise unwanted exceptions could occur
The following example raises: TypeError: __int__ returned non-int (type decimal.Decimal)
from lightning import Millisatoshi
one_sat = Millisatoshi("1sat")
two_sats = one_sat * 2
The old value of 1000 sat was too small to cover the dust reserves.
This lead to the situation when trying to open a channel with minimal
amount, the channels got refused because they were not able cover the
commitment fees.
For this reason the minimal capacity should be increased to i.e. 10k
satoshi, as the technical minimum that also accounts for fees and
reserves is somewhere around 6k sat.
The spec says not to send a commitment_signed without any changes, but LND
does this. To understand why, you have to understand how LND works. I
haven't read the code, but I'm pretty sure it works like this:
1. lnd slows down to do garbage collection, because it's in Go.
2. When an alert timer goes off, noticing it's not making process, it
sends a twitter message to @roasbeef.
3. @roasbeef sshs into the user's machine and binary patches lnd to send
a commitment_signed message.
4. Unfortunately he works so fast that various laws of causality are broken,
meaning sometimes the commitment_signed is sent before any of thes
other things happen.
I'm fairly sure that this will stop as @roasbeef ages, or lnd introduces
some kind of causality enforcement fix.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Refactored the weighted-reservoir-sampling algo to make it more straightforward.
It now uses the excess as fraction of capacity as weight. This favors channels that
are more _relatively_ unbalanced to be used for incoming payment.
Now passes test_invoice_routeboost_private() when using max fundamount=16777215.
This fixes block parsing on testnet; specifically, non-standard tx versions.
We hit a type bug in libwally (wallt_get_secp_context()) which I had to
work around for the moment, and the updated libsecp adds an optional hash
function arg to the ECDH function.
Fixes: #2563
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
make it easier to fire up a local test environment to try out
c-lightning.
requires bitcoind to be installed. to use, you have to run it
via `source contrib/startup_regtest.sh`, so that the aliases
are set correctly.
make it a bit easier to track mutual channel closures by
adding broadcast txid to the listpeers billboard.
since lightningd manages the 'identity' of the closing tx we need
to send it back to closingd so it can update the billboard
appropriately.
This also allows plugins to do "hold invoices" a-la LND, useful for
just-in-time inventory handling.
We're careful to handle the invoice getting paid behind our backs, and
the incoming HTLC going away.
Once @cdecker's sphinx rework is in, we can also hand the raw payload
to the invoice_payment_hook, for special effects.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We're going to make it async, so start by moving the core code into
invoice.c and having that directly call fail/success functions for the
htlc.
We add an extra check in fulfill_htlc() that the HTLC state is correct:
that can't happen now, but may once we're async.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
When we compact the store, we need to adjust the broadast index for
peers so they know where they're up to.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This requires some trickiness when we want to re-add unannounced channels
to the store after compaction, so we extract a common "copy_message" to
transfer from old store to new.
MCP results from 5 runs, min-max(mean +/- stddev):
store_load_msec:36034-37853(37109.8+/-5.9e+02)
vsz_kb:577456
store_rewrite_sec:12.490000-13.250000(12.862+/-0.27)
listnodes_sec:1.250000-1.480000(1.364+/-0.09)
listchannels_sec:30.820000-31.480000(31.068+/-0.24)
routing_sec:26.940000-27.990000(27.616+/-0.39)
peer_write_all_sec:65.690000-68.600000(66.698+/-0.99)
MCP notable changes from previous patch (>1 stddev):
-vsz_kb:1202316
+vsz_kb:577456
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The next patch causes us to access the store while loading (we read
channel_updates for local peers), which messes up loading due to the
lseek involved.
Using pread() is atomic with seek & read, and also a bit more
efficient. Make the header contiguous too, while we're here.
We don't need pwrite: we always open with O_APPEND which means the
seek-to-end is implicit.
MCP results from 5 runs, min-max(mean +/- stddev):
store_load_msec:36771-38289(37529.6+/-5.3e+02)
vsz_kb:1202316
store_rewrite_sec:12.460000-13.280000(12.784+/-0.29)
listnodes_sec:1.240000-1.410000(1.34+/-0.058)
listchannels_sec:29.850000-31.840000(30.908+/-0.69)
routing_sec:27.800000-31.790000(28.822+/-1.5)
peer_write_all_sec:66.200000-68.720000(67.44+/-0.84)
MCP notable changes from previous patch (>1 stddev):
-store_load_msec:39207-45089(41374.6+/-2.2e+03)
+store_load_msec:36771-38289(37529.6+/-5.3e+02)
-store_rewrite_sec:15.090000-16.790000(15.654+/-0.63)
+store_rewrite_sec:12.460000-13.280000(12.784+/-0.29)
-peer_write_all_sec:66.830000-76.850000(71.976+/-3.6)
+peer_write_all_sec:66.200000-68.720000(67.44+/-0.84)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
When we no longer keep channel_updates in memory, there's a path where
we access them on load: when we promote a local channel to an
announced channel.
This breaks at the moment, since gs->fd == -1; change it to a writable
flag instead.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The txout_script field is unused; the local_disable only applies to
the handful of local channels, so move that into a hash table.
MCP results from 5 runs, min-max(mean +/- stddev):
store_load_msec:39207-45089(41374.6+/-2.2e+03)
vsz_kb:1202316
store_rewrite_sec:15.090000-16.790000(15.654+/-0.63)
listnodes_sec:1.290000-3.790000(1.938+/-0.93)
listchannels_sec:30.190000-32.120000(31.31+/-0.69)
routing_sec:28.220000-31.340000(29.314+/-1.2)
peer_write_all_sec:66.830000-76.850000(71.976+/-3.6)
MCP notable changes from previous patch (>1 stddev):
-store_load_msec:35107-37944(36686+/-1e+03)
+store_load_msec:39207-45089(41374.6+/-2.2e+03)
-vsz_kb:1218036
+vsz_kb:1202316
-listchannels_sec:28.510000-30.270000(29.6+/-0.6)
+listchannels_sec:30.190000-32.120000(31.31+/-0.69)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We used to have a `struct chan` while we're waiting for an update; now we
keep that internally. So a `struct chan` without a channel_announcement
in the store is private, and other is public.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Reload them from disk if they do listnodes.
MCP results from 5 runs, min-max(mean +/- stddev):
store_load_msec:35390-38659(37336.4+/-1.3e+03)
vsz_kb:1780516
store_rewrite_sec:13.800000-16.800000(15.02+/-0.98)
listnodes_sec:1.280000-1.530000(1.382+/-0.096)
listchannels_sec:28.700000-30.440000(29.34+/-0.68)
routing_sec:30.120000-31.080000(30.526+/-0.35)
peer_write_all_sec:65.910000-76.850000(69.462+/-4.1)
MCP notable changes from previous patch (>1 stddev):
-vsz_kb:1792996
+vsz_kb:1780516
-listnodes_sec:1.030000-1.120000(1.068+/-0.032)
+listnodes_sec:1.280000-1.530000(1.382+/-0.096)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We currently create a struct chan when we receive a `channel_announcement`,
but we can only broadcast once we have a `channel_update` (since that
provides the timestamp).
This means a `struct chan` can be in a weird state where it exists,
but is unusable (can't use without an update), and also means we need to
keep the channel_announcement message around until an update arrives, so
we can put it in the gossip_store.
Instead, keep track of these "unupdated" channels separately, and check
for them in all the places we search for a specific channel to update.
MCP results from 5 runs, min-max(mean +/- stddev):
store_load_msec:30640-33236(32202+/-8.7e+02)
vsz_kb:1812956
store_rewrite_sec:13.410000-16.970000(14.438+/-1.3)
listnodes_sec:0.590000-0.660000(0.62+/-0.033)
listchannels_sec:28.140000-29.560000(28.816+/-0.56)
routing_sec:29.530000-32.590000(30.352+/-1.1)
peer_write_all_sec:60.380000-61.320000(60.836+/-0.37)
MCP notable changes from previous patch (>1 stddev):
-vsz_kb:1812904
+vsz_kb:1812956
-store_rewrite_sec:21.390000-27.070000(23.596+/-2.4)
+store_rewrite_sec:13.410000-16.970000(14.438+/-1.3)
-listnodes_sec:1.120000-1.230000(1.176+/-0.044)
+listnodes_sec:0.590000-0.660000(0.62+/-0.033)
-listchannels_sec:38.900000-50.580000(44.716+/-3.9)
+listchannels_sec:28.140000-29.560000(28.816+/-0.56)
-routing_sec:45.080000-48.160000(46.814+/-1.1)
+routing_sec:29.530000-32.590000(30.352+/-1.1)
-peer_write_all_sec:58.780000-87.150000(72.278+/-9.7)
+peer_write_all_sec:60.380000-61.320000(60.836+/-0.37)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
If we have a channel_announcement, we catch any node_announcement for
either end while we validate the channel_announcement. But if we have
multiple channel_announcements and the first one failed to verify, it
would remove this catch, meaning we'd discard following node_announcements
even though there was a pending channel_announcement.
The answer is to use a simple reference count, and as a further
optimization, only place the `pending_node_announce` if there's no
node already.
We also move the process_pending_node_announcement() calls lower down,
so *any* new channel creation checks it. This is more robust, and
will prove useful for the next patch, where we can use the same
mechanism to handle node_announcements on channel_announcements which
are verified, but don't yet have a channel_update.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is currently done higher up, in handle_channel_update(), but
that's one reason why handle_channel_update() has to do a channel
lookup. Moving the check down means handle_channel_update() can do a
minimal "get node id for this channel" so it can check the signature.
This helps, because the chan lookup semantics are changing in the next
few patches.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
If we need the payload, pull it from the gossip store.
MCP results from 5 runs, min-max(mean +/- stddev):
store_load_msec:30189-52561(39416.4+/-8.8e+03)
vsz_kb:1812904
store_rewrite_sec:21.390000-27.070000(23.596+/-2.4)
listnodes_sec:1.120000-1.230000(1.176+/-0.044)
listchannels_sec:38.900000-50.580000(44.716+/-3.9)
routing_sec:45.080000-48.160000(46.814+/-1.1)
peer_write_all_sec:58.780000-87.150000(72.278+/-9.7)
MCP notable changes from previous patch (>1 stddev):
-vsz_kb:2288784
+vsz_kb:1812904
-store_rewrite_sec:38.060000-39.130000(38.426+/-0.39)
+store_rewrite_sec:21.390000-27.070000(23.596+/-2.4)
-listnodes_sec:0.750000-0.850000(0.794+/-0.042)
+listnodes_sec:1.120000-1.230000(1.176+/-0.044)
-listchannels_sec:30.740000-31.760000(31.096+/-0.35)
+listchannels_sec:38.900000-50.580000(44.716+/-3.9)
-routing_sec:29.600000-33.560000(30.472+/-1.5)
+routing_sec:45.080000-48.160000(46.814+/-1.1)
-peer_write_all_sec:49.220000-52.690000(50.892+/-1.3)
+peer_write_all_sec:58.780000-87.150000(72.278+/-9.7)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Instead of an arbitrary counter, we can use the file offset for our
partial ordering, removing a field. It takes some care when we compact
the store, however, as this field changes.
MCP results from 5 runs, min-max(mean +/- stddev):
store_load_msec:34271-35283(34789.6+/-3.3e+02)
vsz_kb:2288784
store_rewrite_sec:38.060000-39.130000(38.426+/-0.39)
listnodes_sec:0.750000-0.850000(0.794+/-0.042)
listchannels_sec:30.740000-31.760000(31.096+/-0.35)
routing_sec:29.600000-33.560000(30.472+/-1.5)
peer_write_all_sec:49.220000-52.690000(50.892+/-1.3)
MCP notable changes from previous patch (>1 stddev):
-store_load_msec:35685-38538(37090.4+/-9.1e+02)
+store_load_msec:34271-35283(34789.6+/-3.3e+02)
-vsz_kb:2288768
+vsz_kb:2288784
-peer_write_all_sec:51.140000-58.350000(55.69+/-2.4)
+peer_write_all_sec:49.220000-52.690000(50.892+/-1.3)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is more compact, but also required once we replace the arbitrary
"index" with an actual offset into the gossip store. That will let us
remove the in-memory variants entirely.
MCP results from 5 runs, min-max(mean +/- stddev):
store_load_msec:35685-38538(37090.4+/-9.1e+02)
vsz_kb:2288768
store_rewrite_sec:35.530000-41.230000(37.904+/-2.3)
listnodes_sec:0.720000-0.810000(0.762+/-0.041)
listchannels_sec:30.750000-35.990000(32.704+/-2)
routing_sec:29.570000-34.010000(31.374+/-1.8)
peer_write_all_sec:51.140000-58.350000(55.69+/-2.4)
MCP notable changes from previous patch (>1 stddev):
-vsz_kb:2621808
+vsz_kb:2288768
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We used an s64 so we could use -1 and save a check, but that's just
silly as we have adjacent non-u64 fields: wastes 7 bytes per node
and 16 per channel.
Interestingly, this seemed to make us a little slower for some reason.
MCP results from 5 runs, min-max(mean +/- stddev):
store_load_msec:35569-38776(37169.8+/-1.2e+03)
vsz_kb:2621808
store_rewrite_sec:35.870000-40.290000(38.14+/-1.6)
listnodes_sec:0.740000-0.800000(0.768+/-0.023)
listchannels_sec:29.820000-32.730000(30.972+/-0.99)
routing_sec:30.110000-30.590000(30.346+/-0.18)
peer_write_all_sec:52.420000-59.160000(54.692+/-2.5)
MCP notable changes from previous patch (>1 stddev):
-store_load_msec:32825-36365(34615.6+/-1.1e+03)
+store_load_msec:35569-38776(37169.8+/-1.2e+03)
-vsz_kb:2637488
+vsz_kb:2621808
-store_rewrite_sec:35.150000-36.200000(35.59+/-0.4)
+store_rewrite_sec:35.870000-40.290000(38.14+/-1.6)
-listnodes_sec:0.590000-0.710000(0.682+/-0.046)
+listnodes_sec:0.740000-0.800000(0.768+/-0.023)
-peer_write_all_sec:49.020000-52.890000(50.376+/-1.5)
+peer_write_all_sec:52.420000-59.160000(54.692+/-2.5)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Gálli Zoltán
Michael Schmoock
Rusty Russell
Simon Vrouwe
trueptolemy
lisa neigut