multi: add coin selection strategy option to all on-chain rpcs

In this commit, we add the coin selection strategy option to the following
on-chain RPCs `fundpsbt`, `batchopenchannel`, `estimatefee`, `sendcoins`,
`sendmany`, and `sendoutputs`.

lnwallet/btcwallet/btcwallet.go

@@ -978,8 +978,8 @@ func (b *BtcWallet) ImportTaprootScript(scope waddrmgr.KeyScope,
 //
 // This is a part of the WalletController interface.
 func (b *BtcWallet) SendOutputs(outputs []*wire.TxOut,
-	feeRate chainfee.SatPerKWeight, minConfs int32,
-	label string) (*wire.MsgTx, error) {
+	feeRate chainfee.SatPerKWeight, minConfs int32, label string,
+	strategy base.CoinSelectionStrategy) (*wire.MsgTx, error) {
 
 	// Convert our fee rate from sat/kw to sat/kb since it's required by
 	// SendOutputs.
@@ -997,7 +997,7 @@ func (b *BtcWallet) SendOutputs(outputs []*wire.TxOut,
 
 	return b.wallet.SendOutputs(
 		outputs, nil, defaultAccount, minConfs, feeSatPerKB,
-		b.cfg.CoinSelectionStrategy, label,
+		strategy, label,
 	)
 }
 
@@ -1016,6 +1016,7 @@ func (b *BtcWallet) SendOutputs(outputs []*wire.TxOut,
 // This is a part of the WalletController interface.
 func (b *BtcWallet) CreateSimpleTx(outputs []*wire.TxOut,
 	feeRate chainfee.SatPerKWeight, minConfs int32,
+	strategy base.CoinSelectionStrategy,
 	dryRun bool) (*txauthor.AuthoredTx, error) {
 
 	// The fee rate is passed in using units of sat/kw, so we'll convert
@@ -1048,7 +1049,7 @@ func (b *BtcWallet) CreateSimpleTx(outputs []*wire.TxOut,
 
 	return b.wallet.CreateSimpleTx(
 		nil, defaultAccount, outputs, minConfs, feeSatPerKB,
-		b.cfg.CoinSelectionStrategy, dryRun,
+		strategy, dryRun,
 	)
 }
 

lnwallet/btcwallet/psbt.go

@@ -73,7 +73,8 @@ var (
 // This is a part of the WalletController interface.
 func (b *BtcWallet) FundPsbt(packet *psbt.Packet, minConfs int32,
 	feeRate chainfee.SatPerKWeight, accountName string,
-	changeScope *waddrmgr.KeyScope) (int32, error) {
+	changeScope *waddrmgr.KeyScope,
+	strategy wallet.CoinSelectionStrategy) (int32, error) {
 
 	// The fee rate is passed in using units of sat/kw, so we'll convert
 	// this to sat/KB as the CreateSimpleTx method requires this unit.
@@ -134,7 +135,7 @@ func (b *BtcWallet) FundPsbt(packet *psbt.Packet, minConfs int32,
 	// the partial TX information in the packet.
 	return b.wallet.FundPsbt(
 		packet, keyScope, minConfs, accountNum, feeSatPerKB,
-		b.cfg.CoinSelectionStrategy, opts...,
+		strategy, opts...,
 	)
 }
 

lnwallet/interface.go

@@ -345,7 +345,8 @@ type WalletController interface {
 	//
 	// NOTE: This method requires the global coin selection lock to be held.
 	SendOutputs(outputs []*wire.TxOut, feeRate chainfee.SatPerKWeight,
-		minConfs int32, label string) (*wire.MsgTx, error)
+		minConfs int32, label string,
+		strategy base.CoinSelectionStrategy) (*wire.MsgTx, error)
 
 	// CreateSimpleTx creates a Bitcoin transaction paying to the specified
 	// outputs. The transaction is not broadcasted to the network. In the
@@ -360,7 +361,8 @@ type WalletController interface {
 	//
 	// NOTE: This method requires the global coin selection lock to be held.
 	CreateSimpleTx(outputs []*wire.TxOut, feeRate chainfee.SatPerKWeight,
-		minConfs int32, dryRun bool) (*txauthor.AuthoredTx, error)
+		minConfs int32, strategy base.CoinSelectionStrategy,
+		dryRun bool) (*txauthor.AuthoredTx, error)
 
 	// GetTransactionDetails returns a detailed description of a transaction
 	// given its transaction hash.
@@ -465,7 +467,8 @@ type WalletController interface {
 	// to lock the inputs before handing them out.
 	FundPsbt(packet *psbt.Packet, minConfs int32,
 		feeRate chainfee.SatPerKWeight, account string,
-		changeScope *waddrmgr.KeyScope) (int32, error)
+		changeScope *waddrmgr.KeyScope,
+		strategy base.CoinSelectionStrategy) (int32, error)
 
 	// SignPsbt expects a partial transaction with all inputs and outputs
 	// fully declared and tries to sign all unsigned inputs that have all

lnwallet/mock.go

@@ -146,14 +146,16 @@ func (w *mockWalletController) ImportTaprootScript(waddrmgr.KeyScope,
 
 // SendOutputs currently returns dummy values.
 func (w *mockWalletController) SendOutputs([]*wire.TxOut,
-	chainfee.SatPerKWeight, int32, string) (*wire.MsgTx, error) {
+	chainfee.SatPerKWeight, int32, string,
+	base.CoinSelectionStrategy) (*wire.MsgTx, error) {
 
 	return nil, nil
 }
 
 // CreateSimpleTx currently returns dummy values.
 func (w *mockWalletController) CreateSimpleTx([]*wire.TxOut,
-	chainfee.SatPerKWeight, int32, bool) (*txauthor.AuthoredTx, error) {
+	chainfee.SatPerKWeight, int32, base.CoinSelectionStrategy,
+	bool) (*txauthor.AuthoredTx, error) {
 
 	return nil, nil
 }
@@ -214,7 +216,8 @@ func (w *mockWalletController) ListLeasedOutputs() (
 
 // FundPsbt currently does nothing.
 func (w *mockWalletController) FundPsbt(*psbt.Packet, int32,
-	chainfee.SatPerKWeight, string, *waddrmgr.KeyScope) (int32, error) {
+	chainfee.SatPerKWeight, string, *waddrmgr.KeyScope,
+	base.CoinSelectionStrategy) (int32, error) {
 
 	return 0, nil
 }

lnwallet/rpcwallet/rpcwallet.go

@@ -121,11 +121,11 @@ func (r *RPCKeyRing) NewAddress(addrType lnwallet.AddressType, change bool,
 //
 // NOTE: This method only signs with BIP49/84 keys.
 func (r *RPCKeyRing) SendOutputs(outputs []*wire.TxOut,
-	feeRate chainfee.SatPerKWeight, minConfs int32,
-	label string) (*wire.MsgTx, error) {
+	feeRate chainfee.SatPerKWeight, minConfs int32, label string,
+	strategy basewallet.CoinSelectionStrategy) (*wire.MsgTx, error) {
 
 	tx, err := r.WalletController.SendOutputs(
-		outputs, feeRate, minConfs, label,
+		outputs, feeRate, minConfs, label, strategy,
 	)
 	if err != nil && err != basewallet.ErrTxUnsigned {
 		return nil, err

lnwallet/test/test_interface.go

@@ -170,6 +170,7 @@ func sendCoins(t *testing.T, miner *rpctest.Harness,
 
 	tx, err := sender.SendOutputs(
 		[]*wire.TxOut{output}, feeRate, minConf, labels.External,
+		sender.Cfg.CoinSelectionStrategy,
 	)
 	require.NoError(t, err, "unable to send transaction")
 
@@ -1189,6 +1190,7 @@ func testListTransactionDetails(miner *rpctest.Harness,
 	burnOutput := wire.NewTxOut(outputAmt, outputScript)
 	burnTX, err := alice.SendOutputs(
 		[]*wire.TxOut{burnOutput}, 2500, 1, labels.External,
+		alice.Cfg.CoinSelectionStrategy,
 	)
 	require.NoError(t, err, "unable to create burn tx")
 	burnTXID := burnTX.TxHash()
@@ -1448,6 +1450,7 @@ func testTransactionSubscriptions(miner *rpctest.Harness,
 	burnOutput := wire.NewTxOut(outputAmt, outputScript)
 	tx, err := alice.SendOutputs(
 		[]*wire.TxOut{burnOutput}, 2500, 1, labels.External,
+		alice.Cfg.CoinSelectionStrategy,
 	)
 	require.NoError(t, err, "unable to create tx")
 	txid := tx.TxHash()
@@ -1636,6 +1639,7 @@ func newTx(t *testing.T, r *rpctest.Harness, pubKey *btcec.PublicKey,
 	}
 	tx, err := alice.SendOutputs(
 		[]*wire.TxOut{newOutput}, 2500, 1, labels.External,
+		alice.Cfg.CoinSelectionStrategy,
 	)
 	require.NoError(t, err, "unable to create output")
 
@@ -1951,6 +1955,7 @@ func testSignOutputUsingTweaks(r *rpctest.Harness,
 		}
 		tx, err := alice.SendOutputs(
 			[]*wire.TxOut{newOutput}, 2500, 1, labels.External,
+			alice.Cfg.CoinSelectionStrategy,
 		)
 		if err != nil {
 			t.Fatalf("unable to create output: %v", err)
@@ -2069,6 +2074,7 @@ func testReorgWalletBalance(r *rpctest.Harness, w *lnwallet.LightningWallet,
 	}
 	tx, err := w.SendOutputs(
 		[]*wire.TxOut{output}, 2500, 1, labels.External,
+		w.Cfg.CoinSelectionStrategy,
 	)
 	require.NoError(t, err, "unable to send outputs")
 	txid := tx.TxHash()
@@ -2293,6 +2299,7 @@ func testSpendUnconfirmed(miner *rpctest.Harness,
 	}
 	_, err = bob.SendOutputs(
 		[]*wire.TxOut{output}, txFeeRate, 0, labels.External,
+		bob.Cfg.CoinSelectionStrategy,
 	)
 	if err == nil {
 		t.Fatalf("should have not been able to pay due to insufficient balance: %v", err)
@@ -2319,6 +2326,7 @@ func testSpendUnconfirmed(miner *rpctest.Harness,
 	// using confirmed outputs only.
 	_, err = bob.SendOutputs(
 		[]*wire.TxOut{output}, txFeeRate, 1, labels.External,
+		bob.Cfg.CoinSelectionStrategy,
 	)
 	if err == nil {
 		t.Fatalf("should have not been able to pay due to insufficient balance: %v", err)
@@ -2559,7 +2567,8 @@ func testCreateSimpleTx(r *rpctest.Harness, w *lnwallet.LightningWallet,
 
 		// Now try creating a tx spending to these outputs.
 		createTx, createErr := w.CreateSimpleTx(
-			outputs, feeRate, minConfs, true,
+			outputs, feeRate, minConfs,
+			w.Cfg.CoinSelectionStrategy, true,
 		)
 		switch {
 		case test.valid && createErr != nil:
@@ -2578,6 +2587,7 @@ func testCreateSimpleTx(r *rpctest.Harness, w *lnwallet.LightningWallet,
 		// that the change output position might be different.
 		tx, sendErr := w.SendOutputs(
 			outputs, feeRate, minConfs, labels.External,
+			w.Cfg.CoinSelectionStrategy,
 		)
 		switch {
 		case test.valid && sendErr != nil: