rpc: minConfs and spendUnconfirmed for EstimateFee

lnwallet/btcwallet/btcwallet.go

@@ -519,7 +519,8 @@ 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, dryRun bool) (*txauthor.AuthoredTx, error) {
+	feeRate chainfee.SatPerKWeight, minConfs int32,
+	dryRun bool) (*txauthor.AuthoredTx, 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.
@@ -529,6 +530,12 @@ func (b *BtcWallet) CreateSimpleTx(outputs []*wire.TxOut,
 	if len(outputs) < 1 {
 		return nil, lnwallet.ErrNoOutputs
 	}
+
+	// Sanity check minConfs.
+	if minConfs < 0 {
+		return nil, lnwallet.ErrInvalidMinconf
+	}
+
 	for _, output := range outputs {
 		// When checking an output for things like dusty-ness, we'll
 		// use the default mempool relay fee rather than the target
@@ -544,7 +551,7 @@ func (b *BtcWallet) CreateSimpleTx(outputs []*wire.TxOut,
 	}
 
 	return b.wallet.CreateSimpleTx(
-		nil, defaultAccount, outputs, 1, feeSatPerKB, dryRun,
+		nil, defaultAccount, outputs, minConfs, feeSatPerKB, dryRun,
 	)
 }