Skip to content

Commit 65c8476

Browse files
carlaKCcarlaKC
committed
multi: add preimage push to loop out after sweep attempt
Once we have revealed our preimage to the world with a sweep attempt, we can safely push our preimage to the server to speed up on chain claim. Rather than rely on the server, we use the state of our invoice in lnd to determine whether we should continue trying to push the preimage to the server.
1 parent 488df78 commit 65c8476

File tree

11 files changed

+600
-72
lines changed

11 files changed

+600
-72
lines changed

‎client_test.go

Lines changed: 13 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -12,7 +12,9 @@ import (
1212
"github.com/lightninglabs/loop/lndclient"
1313
"github.com/lightninglabs/loop/loopdb"
1414
"github.com/lightninglabs/loop/test"
15+
"github.com/lightningnetwork/lnd/lnrpc"
1516
"github.com/lightningnetwork/lnd/lntypes"
17+
"github.com/stretchr/testify/require"
1618
)
1719

1820
var (
@@ -261,6 +263,10 @@ func testSuccess(ctx *testContext, amt btcutil.Amount, hash lntypes.Hash,
261263

262264
ctx.AssertRegisterSpendNtfn(confIntent.PkScript)
263265

266+
// Assert that a call to track payment was sent, and respond with status
267+
// in flight so that our swap will push its preimage to the server.
268+
ctx.trackPayment(lnrpc.Payment_IN_FLIGHT)
269+
264270
// Publish tick.
265271
ctx.expiryChan <- testTime
266272

@@ -287,6 +293,13 @@ func testSuccess(ctx *testContext, amt btcutil.Amount, hash lntypes.Hash,
287293
ctx.T.Fatalf("incorrect preimage")
288294
}
289295

296+
// Since we successfully published our sweep, we expect the preimage to
297+
// have been pushed to our mock server.
298+
preimage, err := lntypes.MakePreimage(clientPreImage)
299+
require.NoError(ctx.T, err)
300+
301+
ctx.assertPreimagePush(preimage)
302+
290303
// Simulate server pulling payment.
291304
signalSwapPaymentResult(nil)
292305

‎go.mod

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -13,6 +13,7 @@ require (
1313
github.com/lightninglabs/protobuf-hex-display v1.3.3-0.20191212020323-b444784ce75d
1414
github.com/lightningnetwork/lnd v0.10.0-beta.rc6.0.20200603030653-09bb9db78246
1515
github.com/lightningnetwork/lnd/queue v1.0.4
16+
github.com/stretchr/testify v1.4.0
1617
github.com/urfave/cli v1.20.0
1718
golang.org/x/net v0.0.0-20191002035440-2ec189313ef0
1819
golang.org/x/text v0.3.2 // indirect

‎go.sum

Lines changed: 0 additions & 15 deletions
Original file line numberDiff line numberDiff line change
@@ -1,14 +1,10 @@
11
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
2-
git.schwanenlied.me/yawning/bsaes.git v0.0.0-20180720073208-c0276d75487e h1:F2x1bq7RaNCIuqYpswggh1+c1JmwdnkHNC9wy1KDip0=
32
git.schwanenlied.me/yawning/bsaes.git v0.0.0-20180720073208-c0276d75487e/go.mod h1:BWqTsj8PgcPriQJGl7el20J/7TuT1d/hSyFDXMEpoEo=
43
github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
54
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
6-
github.com/NebulousLabs/fastrand v0.0.0-20181203155948-6fb6489aac4e h1:n+DcnTNkQnHlwpsrHoQtkrJIO7CBx029fw6oR4vIob4=
75
github.com/NebulousLabs/fastrand v0.0.0-20181203155948-6fb6489aac4e/go.mod h1:Bdzq+51GR4/0DIhaICZEOm+OHvXGwwB2trKZ8B4Y6eQ=
8-
github.com/NebulousLabs/go-upnp v0.0.0-20180202185039-29b680b06c82 h1:MG93+PZYs9PyEsj/n5/haQu2gK0h4tUtSy9ejtMwWa0=
96
github.com/NebulousLabs/go-upnp v0.0.0-20180202185039-29b680b06c82/go.mod h1:GbuBk21JqF+driLX3XtJYNZjGa45YDoa9IqCTzNSfEc=
107
github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
11-
github.com/Yawning/aez v0.0.0-20180114000226-4dad034d9db2 h1:2be4ykKKov3M1yISM2E8gnGXZ/N2SsPawfnGiXxaYEU=
128
github.com/Yawning/aez v0.0.0-20180114000226-4dad034d9db2/go.mod h1:9pIqrY6SXNL8vjRQE5Hd/OL5GyK/9MrGUWs87z/eFfk=
139
github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da h1:KjTM2ks9d14ZYCvmHS9iAKVt9AyzRSqNU1qabPih5BY=
1410
github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da/go.mod h1:eHEWzANqSiWQsof+nXEI9bUVUyV6F53Fp89EuCh2EAA=
@@ -23,14 +19,12 @@ github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0=
2319
github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
2420
github.com/btcsuite/btcd v0.0.0-20190629003639-c26ffa870fd8/go.mod h1:3J08xEfcugPacsc34/LKRU2yO7YmuT8yt28J8k2+rrI=
2521
github.com/btcsuite/btcd v0.0.0-20190824003749-130ea5bddde3/go.mod h1:3J08xEfcugPacsc34/LKRU2yO7YmuT8yt28J8k2+rrI=
26-
github.com/btcsuite/btcd v0.20.1-beta h1:Ik4hyJqN8Jfyv3S4AGBOmyouMsYE3EdYODkMbQjwPGw=
2722
github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
2823
github.com/btcsuite/btcd v0.20.1-beta.0.20200513120220-b470eee47728/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
2924
github.com/btcsuite/btcd v0.20.1-beta.0.20200515232429-9f0179fd2c46 h1:QyTpiR5nQe94vza2qkvf7Ns8XX2Rjh/vdIhO3RzGj4o=
3025
github.com/btcsuite/btcd v0.20.1-beta.0.20200515232429-9f0179fd2c46/go.mod h1:Yktc19YNjh/Iz2//CX0vfRTS4IJKM/RKO5YZ9Fn+Pgo=
3126
github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f h1:bAs4lUbRJpnnkd9VhRV3jjAVU7DJVjMaK+IsvSeZvFo=
3227
github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA=
33-
github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d h1:yJzD/yFppdVCf6ApMkVy8cUxV0XrxdP9rVf6D87/Mng=
3428
github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg=
3529
github.com/btcsuite/btcutil v1.0.2 h1:9iZ1Terx9fMIOtq1VrwdqfsATL9MC2l8ZrUY6YZ2uts=
3630
github.com/btcsuite/btcutil v1.0.2/go.mod h1:j9HUFwoQRsZL3V4n+qG+CUnEGHOarIxfC3Le2Yhbcts=
@@ -48,7 +42,6 @@ github.com/btcsuite/btcwallet/walletdb v1.0.0/go.mod h1:bZTy9RyYZh9fLnSua+/CD48T
4842
github.com/btcsuite/btcwallet/walletdb v1.2.0/go.mod h1:9cwc1Yyg4uvd4ZdfdoMnALji+V9gfWSMfxEdLdR5Vwc=
4943
github.com/btcsuite/btcwallet/walletdb v1.3.1 h1:lW1Ac3F1jJY4K11P+YQtRNcP5jFk27ASfrV7C6mvRU0=
5044
github.com/btcsuite/btcwallet/walletdb v1.3.1/go.mod h1:9cwc1Yyg4uvd4ZdfdoMnALji+V9gfWSMfxEdLdR5Vwc=
51-
github.com/btcsuite/btcwallet/wtxmgr v1.0.0 h1:aIHgViEmZmZfe0tQQqF1xyd2qBqFWxX5vZXkkbjtbeA=
5245
github.com/btcsuite/btcwallet/wtxmgr v1.0.0/go.mod h1:vc4gBprll6BP0UJ+AIGDaySoc7MdAmZf8kelfNb8CFY=
5346
github.com/btcsuite/btcwallet/wtxmgr v1.1.1-0.20200515224913-e0e62245ecbe h1:yQbJVYfsKbdqDQNLxd4hhiLSiMkIygefW5mSHMsdKpc=
5447
github.com/btcsuite/btcwallet/wtxmgr v1.1.1-0.20200515224913-e0e62245ecbe/go.mod h1:OwC0W0HhUszbWdvJvH6xvgabKSJ0lXl11YbmmqF9YXQ=
@@ -135,9 +128,7 @@ github.com/grpc-ecosystem/grpc-gateway v1.12.2 h1:D0EVSTwQoQOyfY35QNSuPJA4jpZRtk
135128
github.com/grpc-ecosystem/grpc-gateway v1.12.2/go.mod h1:8XEsbTttt/W+VvjtQhLACqCisSPWTxCZ7sBRjU6iH9c=
136129
github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
137130
github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
138-
github.com/jackpal/gateway v1.0.5 h1:qzXWUJfuMdlLMtt0a3Dgt+xkWQiA5itDEITVJtuSwMc=
139131
github.com/jackpal/gateway v1.0.5/go.mod h1:lTpwd4ACLXmpyiCTRtfiNyVnUmqT9RivzCDQetPfnjA=
140-
github.com/jackpal/go-nat-pmp v0.0.0-20170405195558-28a68d0c24ad h1:heFfj7z0pGsNCekUlsFhO2jstxO4b5iQ665LjwM5mDc=
141132
github.com/jackpal/go-nat-pmp v0.0.0-20170405195558-28a68d0c24ad/go.mod h1:QPH045xvCAeXUZOxsnwmrtiCoxIr9eob+4orBN1SBKc=
142133
github.com/jedib0t/go-pretty v4.3.0+incompatible/go.mod h1:XemHduiw8R651AF9Pt4FwCTKeG3oo7hrHJAoznj9nag=
143134
github.com/jessevdk/go-flags v0.0.0-20141203071132-1679536dcc89/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
@@ -178,7 +169,6 @@ github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
178169
github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
179170
github.com/lightninglabs/gozmq v0.0.0-20191113021534-d20a764486bf h1:HZKvJUHlcXI/f/O0Avg7t8sqkPo78HFzjmeYFl6DPnc=
180171
github.com/lightninglabs/gozmq v0.0.0-20191113021534-d20a764486bf/go.mod h1:vxmQPeIQxPf6Jf9rM8R+B4rKBqLA2AjttNxkFBL2Plk=
181-
github.com/lightninglabs/neutrino v0.11.0 h1:lPpYFCtsfJX2W5zI4pWycPmbbBdr7zU+BafYdLoD6k0=
182172
github.com/lightninglabs/neutrino v0.11.0/go.mod h1:CuhF0iuzg9Sp2HO6ZgXgayviFTn1QHdSTJlMncK80wg=
183173
github.com/lightninglabs/neutrino v0.11.1-0.20200316235139-bffc52e8f200 h1:j4iZ1XlUAPQmW6oSzMcJGILYsRHNs+4O3Gk+2Ms5Dww=
184174
github.com/lightninglabs/neutrino v0.11.1-0.20200316235139-bffc52e8f200/go.mod h1:MlZmoKa7CJP3eR1s5yB7Rm5aSyadpKkxqAwLQmog7N0=
@@ -191,7 +181,6 @@ github.com/lightningnetwork/lnd v0.10.0-beta.rc6.0.20200603030653-09bb9db78246/g
191181
github.com/lightningnetwork/lnd/cert v1.0.2/go.mod h1:fmtemlSMf5t4hsQmcprSoOykypAPp+9c+0d0iqTScMo=
192182
github.com/lightningnetwork/lnd/clock v1.0.0 h1:U9uknV7DwBsNUzc+x11tx1bPvoXiEYcJ9wrIemRibKE=
193183
github.com/lightningnetwork/lnd/clock v1.0.0/go.mod h1:KnQudQ6w0IAMZi1SgvecLZQZ43ra2vpDNj7H/aasemg=
194-
github.com/lightningnetwork/lnd/queue v1.0.1 h1:jzJKcTy3Nj5lQrooJ3aaw9Lau3I0IwvQR5sqtjdv2R0=
195184
github.com/lightningnetwork/lnd/queue v1.0.1/go.mod h1:vaQwexir73flPW43Mrm7JOgJHmcEFBWWSl9HlyASoms=
196185
github.com/lightningnetwork/lnd/queue v1.0.4 h1:8Dq3vxAFSACPy+pKN88oPFhuCpCoAAChPBwa4BJxH4k=
197186
github.com/lightningnetwork/lnd/queue v1.0.4/go.mod h1:YTkTVZCxz8tAYreH27EO3s8572ODumWrNdYW2E/YKxg=
@@ -256,7 +245,6 @@ github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81P
256245
github.com/tidwall/pretty v1.0.0/go.mod h1:XNkn88O1ChpSDQmQeStsy+sBenx6DDtFZJxhVysOjyk=
257246
github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5 h1:LnC5Kc/wtumK+WB441p7ynQJzVuNRJiqddSIE3IlSEQ=
258247
github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
259-
github.com/tv42/zbase32 v0.0.0-20160707012821-501572607d02 h1:tcJ6OjwOMvExLlzrAVZute09ocAGa7KqOON60++Gz4E=
260248
github.com/tv42/zbase32 v0.0.0-20160707012821-501572607d02/go.mod h1:tHlrkM198S068ZqfrO6S8HsoJq2bF3ETfTL+kt4tInY=
261249
github.com/urfave/cli v1.18.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
262250
github.com/urfave/cli v1.20.0 h1:fDqGv3UG/4jbVl/QkFwEdddtEDjh/5Ov6X+0B/3bPaw=
@@ -280,7 +268,6 @@ golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnf
280268
golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
281269
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
282270
golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
283-
golang.org/x/crypto v0.0.0-20200115085410-6d4e4cb37c7d h1:2+ZP7EfsZV7Vvmx3TIqSlSzATMkTAKqM14YGFPoSKjI=
284271
golang.org/x/crypto v0.0.0-20200115085410-6d4e4cb37c7d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
285272
golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37 h1:cg5LA/zNPRzIXIWSCxQW10Rvpy94aQh3LT/ShoCpkHw=
286273
golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
@@ -320,7 +307,6 @@ golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5h
320307
golang.org/x/sys v0.0.0-20190209173611-3b5209105503/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
321308
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
322309
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
323-
golang.org/x/sys v0.0.0-20190904154756-749cb33beabd h1:DBH9mDw0zluJT/R+nGuV3jWFWLFaHyYZWD4tOT+cjn0=
324310
golang.org/x/sys v0.0.0-20190904154756-749cb33beabd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
325311
golang.org/x/sys v0.0.0-20200116001909-b77594299b42 h1:vEOn+mP2zCOVzKckCZy6YsCtDblrpj/w7B9nxGNELpg=
326312
golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -373,7 +359,6 @@ gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkep
373359
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
374360
gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
375361
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
376-
gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
377362
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
378363
gopkg.in/yaml.v2 v2.2.3 h1:fvjTMHxHEw/mxHbtzPi3JCcKXQRAnQTBRo6YCJSVHKI=
379364
gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

‎loopout.go

Lines changed: 79 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -706,6 +706,20 @@ func (s *loopOutSwap) waitForHtlcSpendConfirmed(globalCtx context.Context,
706706
return nil, fmt.Errorf("register spend ntfn: %v", err)
707707
}
708708

709+
// Track our payment status so that we can detect whether our off chain
710+
// htlc is settled. We track this information to determine whether it is
711+
// necessary to continue trying to push our preimage to the server.
712+
trackChan, trackErrChan, err := s.lnd.Router.TrackPayment(
713+
ctx, s.hash,
714+
)
715+
if err != nil {
716+
return nil, fmt.Errorf("track payment: %v", err)
717+
}
718+
719+
// paymentComplete tracks whether our payment is complete, and is used
720+
// to decide whether we need to push our preimage to the server.
721+
var paymentComplete bool
722+
709723
timerChan := s.timerFactory(republishDelay)
710724
for {
711725
select {
@@ -719,6 +733,45 @@ func (s *loopOutSwap) waitForHtlcSpendConfirmed(globalCtx context.Context,
719733
case err := <-spendErr:
720734
return nil, err
721735

736+
// Receive status updates for our payment so that we can detect
737+
// whether we've successfully pushed our preimage.
738+
case status, ok := <-trackChan:
739+
// If our channel has been closed, indicating that the
740+
// server is finished providing updates because the
741+
// payment has reached a terminal state, we replace
742+
// the closed channel with nil so that we will no longer
743+
// listen on it.
744+
if !ok {
745+
trackChan = nil
746+
continue
747+
}
748+
749+
if status.State == lnrpc.Payment_SUCCEEDED {
750+
s.log.Infof("Off chain payment succeeded")
751+
752+
paymentComplete = true
753+
}
754+
755+
// If we receive a track payment error that indicates that the
756+
// server stream is complete, we ignore it because we want to
757+
// continue this loop beyond the completion of the payment.
758+
case err, ok := <-trackErrChan:
759+
// If our channel has been closed, indicating that the
760+
// server is finished providing updates because the
761+
// payment has reached a terminal state, we replace
762+
// the closed channel with nil so that we will no longer
763+
// listen on it.
764+
if !ok {
765+
trackErrChan = nil
766+
continue
767+
}
768+
769+
// Otherwise, if we receive a non-nil error, we return
770+
// it.
771+
if err != nil {
772+
return nil, err
773+
}
774+
722775
// New block arrived, update height and restart the republish
723776
// timer.
724777
case notification := <-s.blockEpochChan:
@@ -733,13 +786,39 @@ func (s *loopOutSwap) waitForHtlcSpendConfirmed(globalCtx context.Context,
733786
return nil, err
734787
}
735788

789+
// If our off chain payment is not yet complete, we
790+
// try to push our preimage to the server.
791+
if !paymentComplete {
792+
s.pushPreimage(ctx)
793+
}
794+
736795
// Context canceled.
737796
case <-globalCtx.Done():
738797
return nil, globalCtx.Err()
739798
}
740799
}
741800
}
742801

802+
// pushPreimage pushes our preimage to the server if we have already revealed
803+
// our preimage on chain with a sweep attempt.
804+
func (s *loopOutSwap) pushPreimage(ctx context.Context) {
805+
// If we have not yet revealed our preimage through a sweep, we do not
806+
// push the preimage because we may choose to never sweep if fees are
807+
// too high.
808+
if s.state != loopdb.StatePreimageRevealed {
809+
return
810+
}
811+
812+
s.log.Infof("Pushing preimage to server")
813+
814+
// Push the preimage to the server, just log server errors since we rely
815+
// on our payment state rather than the server response to judge the
816+
// outcome of our preimage push.
817+
if err := s.server.PushLoopOutPreimage(ctx, s.Preimage); err != nil {
818+
s.log.Warnf("Could not push preimage: %v", err)
819+
}
820+
}
821+
743822
// sweep tries to sweep the given htlc to a destination address. It takes into
744823
// account the max miner fee and marks the preimage as revealed when it
745824
// published the tx.

0 commit comments

Comments
 (0)