lnwallet: use P2TR addresses for change outputs for funding coin select

lnwallet/test/test_interface.go

@@ -2708,6 +2708,14 @@ var walletTests = []walletTestCase{
 		name: "change output spend confirmation",
 		test: testChangeOutputSpendConfirmation,
 	},
+	{
+		// TODO(guggero): this test should remain second until dual
+		// funding can properly exchange full UTXO information and we
+		// can use P2TR change outputs as the funding inputs for a dual
+		// funded channel.
+		name: "dual funder workflow",
+		test: testDualFundingReservationWorkflow,
+	},
 	{
 		name: "spend unconfirmed outputs",
 		test: testSpendUnconfirmed,
@@ -2744,10 +2752,6 @@ var walletTests = []walletTestCase{
 		name: "single funding workflow external funding tx",
 		test: testSingleFunderExternalFundingTx,
 	},
-	{
-		name: "dual funder workflow",
-		test: testDualFundingReservationWorkflow,
-	},
 	{
 		name: "output locking",
 		test: testFundingTransactionLockedOutputs,

lnwallet/wallet.go

@@ -775,7 +775,7 @@ func (l *LightningWallet) handleFundingReserveRequest(req *InitFundingReserveMsg
 			FeeRate:      req.FundingFeePerKw,
 			ChangeAddr: func() (btcutil.Address, error) {
 				return l.NewAddress(
-					WitnessPubKey, true, DefaultAccountName,
+					TaprootPubkey, true, DefaultAccountName,
 				)
 			},
 		}