lnwallet+funding: create CommitmentType enum

lnwallet/wallet.go

@@ -98,9 +98,9 @@ type InitFundingReserveMsg struct {
 	// output selected to fund the channel should satisfy.
 	MinConfs int32
 
-	// Tweakless indicates if the channel should use the new tweakless
-	// commitment format or not.
-	Tweakless bool
+	// CommitType indicates what type of commitment type the channel should
+	// be using, like tweakless or anchors.
+	CommitType CommitmentType
 
 	// ChanFunder is an optional channel funder that allows the caller to
 	// control exactly how the channel funding is carried out. If not
@@ -568,7 +568,7 @@ func (l *LightningWallet) handleFundingReserveRequest(req *InitFundingReserveMsg
 	reservation, err := NewChannelReservation(
 		capacity, localFundingAmt, req.CommitFeePerKw, l, id,
 		req.PushMSat, l.Cfg.NetParams.GenesisHash, req.Flags,
-		req.Tweakless, req.ChanFunder, req.PendingChanID,
+		req.CommitType, req.ChanFunder, req.PendingChanID,
 	)
 	if err != nil {
 		if fundingIntent != nil {