sweep: allow sweeper to sweep P2TR inputs

Author: guggero

sweep/tx_input_set.go

@@ -355,25 +355,28 @@ func (t *txInputSet) tryAddWalletInputsIfNeeded() error {
 // createWalletTxInput converts a wallet utxo into an object that can be added
 // to the other inputs to sweep.
 func createWalletTxInput(utxo *lnwallet.Utxo) (input.Input, error) {
+	signDesc := &input.SignDescriptor{
+		Output: &wire.TxOut{
+			PkScript: utxo.PkScript,
+			Value:    int64(utxo.Value),
+		},
+		HashType: txscript.SigHashAll,
+	}
+
 	var witnessType input.WitnessType
 	switch utxo.AddressType {
 	case lnwallet.WitnessPubKey:
 		witnessType = input.WitnessKeyHash
 	case lnwallet.NestedWitnessPubKey:
 		witnessType = input.NestedWitnessKeyHash
+	case lnwallet.TaprootPubkey:
+		witnessType = input.TaprootPubKeySpend
+		signDesc.HashType = txscript.SigHashDefault
 	default:
 		return nil, fmt.Errorf("unknown address type %v",
 			utxo.AddressType)
 	}
 
-	signDesc := &input.SignDescriptor{
-		Output: &wire.TxOut{
-			PkScript: utxo.PkScript,
-			Value:    int64(utxo.Value),
-		},
-		HashType: txscript.SigHashAll,
-	}
-
 	// A height hint doesn't need to be set, because we don't monitor these
 	// inputs for spend.
 	heightHint := uint32(0)