channeldb+lnwallet: don't pass isRestoredChan to ChanSyncMsg

Since we have access to the internal state of the channel, we can
instead get it directly instead of passing it in as a parameter.

channeldb/channel.go

@@ -803,13 +803,10 @@ func (c *OpenChannel) MarkBorked() error {
 //   3. We didn't get the last RevokeAndAck message they sent, so they'll
 //      re-send it.
 //
-// The isRestoredChan bool indicates if we need to craft a chan sync message
+// If this is a restored channel, having status ChanStatusRestored, then we'll
-// for a channel that's been restored. If this is a restored channel, then
+// modify our typical chan sync message to ensure they force close even if
-// we'll modify our typical chan sync  message to ensure they force close even
+// we're on the very first state.
-// if we're on the very first state.
+func (c *OpenChannel) ChanSyncMsg() (*lnwire.ChannelReestablish, error) {
-func (c *OpenChannel) ChanSyncMsg(
-	isRestoredChan bool) (*lnwire.ChannelReestablish, error) {
-
 	c.Lock()
 	defer c.Unlock()
 
@@ -853,7 +850,7 @@ func (c *OpenChannel) ChanSyncMsg(
 	// If we've restored this channel, then we'll purposefully give them an
 	// invalid LocalUnrevokedCommitPoint so they'll force close the channel
 	// allowing us to sweep our funds.
-	if isRestoredChan {
+	if c.hasChanStatus(ChanStatusRestored) {
 		currentCommitSecret[0] ^= 1
 	}
 

contractcourt/chain_watcher.go

@@ -731,9 +731,7 @@ func (c *chainWatcher) dispatchCooperativeClose(commitSpend *chainntnfs.SpendDet
 	}
 
 	// Attempt to add a channel sync message to the close summary.
-	chanSync, err := c.cfg.chanState.ChanSyncMsg(
+	chanSync, err := c.cfg.chanState.ChanSyncMsg()
-		c.cfg.chanState.HasChanStatus(channeldb.ChanStatusRestored),
-	)
 	if err != nil {
 		log.Errorf("ChannelPoint(%v): unable to create channel sync "+
 			"message: %v", c.cfg.chanState.FundingOutpoint, err)
@@ -810,9 +808,7 @@ func (c *chainWatcher) dispatchLocalForceClose(
 	}
 
 	// Attempt to add a channel sync message to the close summary.
-	chanSync, err := c.cfg.chanState.ChanSyncMsg(
+	chanSync, err := c.cfg.chanState.ChanSyncMsg()
-		c.cfg.chanState.HasChanStatus(channeldb.ChanStatusRestored),
-	)
 	if err != nil {
 		log.Errorf("ChannelPoint(%v): unable to create channel sync "+
 			"message: %v", c.cfg.chanState.FundingOutpoint, err)
@@ -996,9 +992,7 @@ func (c *chainWatcher) dispatchContractBreach(spendEvent *chainntnfs.SpendDetail
 	}
 
 	// Attempt to add a channel sync message to the close summary.
-	chanSync, err := c.cfg.chanState.ChanSyncMsg(
+	chanSync, err := c.cfg.chanState.ChanSyncMsg()
-		c.cfg.chanState.HasChanStatus(channeldb.ChanStatusRestored),
-	)
 	if err != nil {
 		log.Errorf("ChannelPoint(%v): unable to create channel sync "+
 			"message: %v", c.cfg.chanState.FundingOutpoint, err)

htlcswitch/link.go

@@ -609,9 +609,7 @@ func (l *channelLink) syncChanStates() error {
 	// side. Based on this message, the remote party will decide if they
 	// need to retransmit any data or not.
 	chanState := l.channel.State()
-	localChanSyncMsg, err := chanState.ChanSyncMsg(
+	localChanSyncMsg, err := chanState.ChanSyncMsg()
-		chanState.HasChanStatus(channeldb.ChanStatusRestored),
-	)
 	if err != nil {
 		return fmt.Errorf("unable to generate chan sync message for "+
 			"ChannelPoint(%v)", l.channel.ChannelPoint())

lnwallet/channel.go

@@ -5089,9 +5089,7 @@ func NewUnilateralCloseSummary(chanState *channeldb.OpenChannel, signer input.Si
 	}
 
 	// Attempt to add a channel sync message to the close summary.
-	chanSync, err := chanState.ChanSyncMsg(
+	chanSync, err := chanState.ChanSyncMsg()
-		chanState.HasChanStatus(channeldb.ChanStatusRestored),
-	)
 	if err != nil {
 		walletLog.Errorf("ChannelPoint(%v): unable to create channel sync "+
 			"message: %v", chanState.FundingOutpoint, err)

lnwallet/channel_test.go

@@ -2530,7 +2530,7 @@ func assertNoChanSyncNeeded(t *testing.T, aliceChannel *LightningChannel,
 
 	_, _, line, _ := runtime.Caller(1)
 
-	aliceChanSyncMsg, err := aliceChannel.channelState.ChanSyncMsg(false)
+	aliceChanSyncMsg, err := aliceChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("line #%v: unable to produce chan sync msg: %v",
 			line, err)
@@ -2545,7 +2545,7 @@ func assertNoChanSyncNeeded(t *testing.T, aliceChannel *LightningChannel,
 			"instead wants to send: %v", line, spew.Sdump(bobMsgsToSend))
 	}
 
-	bobChanSyncMsg, err := bobChannel.channelState.ChanSyncMsg(false)
+	bobChanSyncMsg, err := bobChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("line #%v: unable to produce chan sync msg: %v",
 			line, err)
@@ -2778,11 +2778,11 @@ func TestChanSyncOweCommitment(t *testing.T) {
 	// Bob doesn't get this message so upon reconnection, they need to
 	// synchronize. Alice should conclude that she owes Bob a commitment,
 	// while Bob should think he's properly synchronized.
-	aliceSyncMsg, err := aliceChannel.channelState.ChanSyncMsg(false)
+	aliceSyncMsg, err := aliceChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
-	bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg(false)
+	bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
@@ -3092,11 +3092,11 @@ func TestChanSyncOweRevocation(t *testing.T) {
 	// If we fetch the channel sync messages at this state, then Alice
 	// should report that she owes Bob a revocation message, while Bob
 	// thinks they're fully in sync.
-	aliceSyncMsg, err := aliceChannel.channelState.ChanSyncMsg(false)
+	aliceSyncMsg, err := aliceChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
-	bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg(false)
+	bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
@@ -3261,11 +3261,11 @@ func TestChanSyncOweRevocationAndCommit(t *testing.T) {
 	// If we now attempt to resync, then Alice should conclude that she
 	// doesn't need any further updates, while Bob concludes that he needs
 	// to re-send both his revocation and commit sig message.
-	aliceSyncMsg, err := aliceChannel.channelState.ChanSyncMsg(false)
+	aliceSyncMsg, err := aliceChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
-	bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg(false)
+	bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
@@ -3472,11 +3472,11 @@ func TestChanSyncOweRevocationAndCommitForceTransition(t *testing.T) {
 	// Now if we attempt to synchronize states at this point, Alice should
 	// detect that she owes nothing, while Bob should re-send both his
 	// RevokeAndAck as well as his commitment message.
-	aliceSyncMsg, err := aliceChannel.channelState.ChanSyncMsg(false)
+	aliceSyncMsg, err := aliceChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
-	bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg(false)
+	bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
@@ -3677,11 +3677,11 @@ func TestChanSyncFailure(t *testing.T) {
 	assertLocalDataLoss := func(aliceOld *LightningChannel) {
 		t.Helper()
 
-		aliceSyncMsg, err := aliceOld.channelState.ChanSyncMsg(false)
+		aliceSyncMsg, err := aliceOld.channelState.ChanSyncMsg()
 		if err != nil {
 			t.Fatalf("unable to produce chan sync msg: %v", err)
 		}
-		bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg(false)
+		bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg()
 		if err != nil {
 			t.Fatalf("unable to produce chan sync msg: %v", err)
 		}
@@ -3755,7 +3755,7 @@ func TestChanSyncFailure(t *testing.T) {
 	// If we remove the recovery options from Bob's message, Alice cannot
 	// tell if she lost state, since Bob might be lying. She still should
 	// be able to detect that chains cannot be synced.
-	bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg(false)
+	bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
@@ -3769,7 +3769,7 @@ func TestChanSyncFailure(t *testing.T) {
 	// If Bob lies about the NextLocalCommitHeight, making it greater than
 	// what Alice expect, she cannot tell for sure whether she lost state,
 	// but should detect the desync.
-	bobSyncMsg, err = bobChannel.channelState.ChanSyncMsg(false)
+	bobSyncMsg, err = bobChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
@@ -3782,7 +3782,7 @@ func TestChanSyncFailure(t *testing.T) {
 
 	// If Bob's NextLocalCommitHeight is lower than what Alice expects, Bob
 	// probably lost state.
-	bobSyncMsg, err = bobChannel.channelState.ChanSyncMsg(false)
+	bobSyncMsg, err = bobChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
@@ -3795,7 +3795,7 @@ func TestChanSyncFailure(t *testing.T) {
 
 	// If Alice and Bob's states are in sync, but Bob is sending the wrong
 	// LocalUnrevokedCommitPoint, Alice should detect this.
-	bobSyncMsg, err = bobChannel.channelState.ChanSyncMsg(false)
+	bobSyncMsg, err = bobChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
@@ -3824,7 +3824,7 @@ func TestChanSyncFailure(t *testing.T) {
 	// when there's a pending remote commit.
 	halfAdvance()
 
-	bobSyncMsg, err = bobChannel.channelState.ChanSyncMsg(false)
+	bobSyncMsg, err = bobChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
@@ -3912,11 +3912,11 @@ func TestChannelRetransmissionFeeUpdate(t *testing.T) {
 	// Bob doesn't get this message so upon reconnection, they need to
 	// synchronize. Alice should conclude that she owes Bob a commitment,
 	// while Bob should think he's properly synchronized.
-	aliceSyncMsg, err := aliceChannel.channelState.ChanSyncMsg(false)
+	aliceSyncMsg, err := aliceChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
-	bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg(false)
+	bobSyncMsg, err := bobChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to produce chan sync msg: %v", err)
 	}
@@ -4361,11 +4361,11 @@ func TestChanSyncInvalidLastSecret(t *testing.T) {
 	}
 
 	// Next, we'll produce the ChanSync messages for both parties.
-	aliceChanSync, err := aliceChannel.channelState.ChanSyncMsg(false)
+	aliceChanSync, err := aliceChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to generate chan sync msg: %v", err)
 	}
-	bobChanSync, err := bobChannel.channelState.ChanSyncMsg(false)
+	bobChanSync, err := bobChannel.channelState.ChanSyncMsg()
 	if err != nil {
 		t.Fatalf("unable to generate chan sync msg: %v", err)
 	}

peer.go

@@ -454,7 +454,7 @@ func (p *peer) loadActiveChannels(chans []*channeldb.OpenChannel) (
 			// channel reestablish message sent from the peer, but
 			// that's okay since the assumption is that we did when
 			// marking the channel borked.
-			chanSync, err := dbChan.ChanSyncMsg(false)
+			chanSync, err := dbChan.ChanSyncMsg()
 			if err != nil {
 				peerLog.Errorf("Unable to create channel "+
 					"reestablish message for channel %v: "+