lnwallet: support transactions and scripts for new commitment type

This commit modifies the channel state machine to be able to derive the
proper commitment and second-level HTLC output scripts required by the
new script-enforced leased channel commitment type.

lnwallet/test_utils.go

@@ -119,6 +119,7 @@ func CreateTestChannels(chanType channeldb.ChannelType) (
 	channelBal := channelCapacity / 2
 	csvTimeoutAlice := uint32(5)
 	csvTimeoutBob := uint32(4)
+	isAliceInitiator := true
 
 	prevOut := &wire.OutPoint{
 		Hash:  chainhash.Hash(testHdSeed),
@@ -223,7 +224,7 @@ func CreateTestChannels(chanType channeldb.ChannelType) (
 
 	aliceCommitTx, bobCommitTx, err := CreateCommitmentTxns(
 		channelBal, channelBal, &aliceCfg, &bobCfg, aliceCommitPoint,
-		bobCommitPoint, *fundingTxIn, chanType,
+		bobCommitPoint, *fundingTxIn, chanType, isAliceInitiator, 0,
 	)
 	if err != nil {
 		return nil, nil, nil, err
@@ -318,7 +319,7 @@ func CreateTestChannels(chanType channeldb.ChannelType) (
 		FundingOutpoint:         *prevOut,
 		ShortChannelID:          shortChanID,
 		ChanType:                chanType,
-		IsInitiator:             true,
+		IsInitiator:             isAliceInitiator,
 		Capacity:                channelCapacity,
 		RemoteCurrentRevocation: bobCommitPoint,
 		RevocationProducer:      alicePreimageProducer,
@@ -336,7 +337,7 @@ func CreateTestChannels(chanType channeldb.ChannelType) (
 		FundingOutpoint:         *prevOut,
 		ShortChannelID:          shortChanID,
 		ChanType:                chanType,
-		IsInitiator:             false,
+		IsInitiator:             !isAliceInitiator,
 		Capacity:                channelCapacity,
 		RemoteCurrentRevocation: aliceCommitPoint,
 		RevocationProducer:      bobPreimageProducer,