lnwallet: funding revamp checkpoint

Need local+remote aux leaves now. The calls DescFromPendingID shift now
for bth remote+local party

Author: Roasbeef

lnwallet/reservation.go

@@ -218,10 +218,14 @@ type ChannelReservation struct {
 
 	fundingIntent chanfunding.Intent
 
-	// initAuxLeaves is an optional set of aux commitment leaves that'll
-	// modify the way we construct the commitment transaction, in
+	// localInitAuxLeaves is an optional set of aux commitment leaves
+	// that'll modify the way we construct the commitment transaction, in
 	// particular the tapscript leaves.
-	initAuxLeaves fn.Option[CommitAuxLeaves]
+	localInitAuxLeaves fn.Option[CommitAuxLeaves]
+
+	// remoteInitAuxLeaves is an optional set of aux commitment leaves for
+	// the remote party.
+	remoteInitAuxLeaves fn.Option[CommitAuxLeaves]
 
 	// nextRevocationKeyLoc stores the key locator information for this
 	// channel.

lnwallet/wallet.go

@@ -108,9 +108,13 @@ type AuxFundingDesc struct {
 	// first commitment entry for the remote party.
 	CustomRemoteCommitBlob tlv.Blob
 
-	// InitAuxLeaves is the set of aux leaves that'll be used for the very
-	// first commitment state.
-	InitAuxLeaves CommitAuxLeaves
+	// LocalInitAuxLeaves is the set of aux leaves that'll be used for our
+	// very first commitment state.
+	LocalInitAuxLeaves CommitAuxLeaves
+
+	// RemoteInitAuxLeaves is the set of aux leaves that'll be used for the
+	// very first commitment state for the remote party.
+	RemoteInitAuxLeaves CommitAuxLeaves
 }
 
 // InitFundingReserveMsg is the first message sent to initiate the workflow
@@ -1481,6 +1485,8 @@ func defaultCommitOpts() createCommitOpts {
 
 // WithAuxLeaves is a functional option that can be used to set the aux leaves
 // for a new commitment transaction.
+//
+// TODO(roasbeef): local+remote  leaves
 func WithAuxLeaves(leaves fn.Option[CommitAuxLeaves]) CreateCommitOpt {
 	return func(o *createCommitOpts) {
 		o.auxLeaves = leaves
@@ -2308,6 +2314,10 @@ func (l *LightningWallet) handleSingleFunderSigs(req *addSingleFunderSigsMsg) {
 	pendingReservation.Lock()
 	defer pendingReservation.Unlock()
 
+	// TODO(roasbeef): get funding desc
+	//  * set all blobs
+	//  * get the local+remote commitAux leaves for below commitment txns
+
 	chanState := pendingReservation.partialState
 	chanType := pendingReservation.partialState.ChanType
 	chanState.FundingOutpoint = *req.fundingOutpoint