Fall back to aezeed prompt if root key is missing

README.md

@@ -70,7 +70,7 @@ Usage:
   chantools [OPTIONS] derivekey [derivekey-OPTIONS]
 
 [derivekey command options]
-          --rootkey=     BIP32 HD root key to derive the key from.
+          --rootkey=     BIP32 HD root key to derive the key from. Leave empty to prompt for lnd 24 word aezeed.
           --path=        The BIP32 derivation path to derive. Must start with "m/".
           --neuter       Do not output the private key, just the public key.
 ```
@@ -93,7 +93,7 @@ Usage:
   chantools [OPTIONS] dumpbackup [dumpbackup-OPTIONS]
 
 [dumpbackup command options]
-          --rootkey=     BIP32 HD root key of the wallet that was used to create the backup.
+          --rootkey=     BIP32 HD root key of the wallet that was used to create the backup. Leave empty to prompt for lnd 24 word aezeed.
           --multi_file=  The lnd channel.backup file to dump.
 ```
 
@@ -133,7 +133,7 @@ Usage:
   chantools [OPTIONS] forceclose [forceclose-OPTIONS]
 
 [forceclose command options]
-          --rootkey=     BIP32 HD root key to use.
+          --rootkey=     BIP32 HD root key to use. Leave empty to prompt for lnd 24 word aezeed.
           --channeldb=   The lnd channel.db file to use for force-closing channels.
           --publish      Should the force-closing TX be published to the chain API?
 ```
@@ -168,7 +168,7 @@ Usage:
   chantools [OPTIONS] rescueclosed [rescueclosed-OPTIONS]
 
 [rescueclosed command options]
-          --rootkey=     BIP32 HD root key to use.
+          --rootkey=     BIP32 HD root key to use. Leave empty to prompt for lnd 24 word aezeed.
           --channeldb=   The lnd channel.db file to use for rescuing force-closed channels.
 ```
 
@@ -230,7 +230,7 @@ Usage:
   chantools [OPTIONS] sweeptimelock [sweeptimelock-OPTIONS]
 
 [sweeptimelock command options]
-          --rootkey=     BIP32 HD root key to use.
+          --rootkey=     BIP32 HD root key to use. Leave empty to prompt for lnd 24 word aezeed.
           --publish      Should the sweep TX be published to the chain API?
           --sweepaddr=   The address the funds should be sweeped to
           --maxcsvlimit= Maximum CSV limit to use. (default 2000)

cmd/chantools/derivekey.go

@@ -17,13 +17,21 @@ type deriveKeyCommand struct {
 func (c *deriveKeyCommand) Execute(_ []string) error {
 	setupChainParams(cfg)
 
-	// Check that root key is valid.
-	if c.RootKey == "" {
-		return fmt.Errorf("root key is required")
+	var (
+		extendedKey *hdkeychain.ExtendedKey
+		err error
+	)
+	
+	// Check that root key is valid or fall back to console input.
+	switch {
+	case c.RootKey != "":
+		extendedKey, err = hdkeychain.NewKeyFromString(c.RootKey)
+
+	default:
+		extendedKey, err = rootKeyFromConsole()
 	}
-	extendedKey, err := hdkeychain.NewKeyFromString(c.RootKey)
 	if err != nil {
-		return fmt.Errorf("error parsing root key: %v", err)
+		return fmt.Errorf("error reading root key: %v", err)
 	}
 
 	return deriveKey(extendedKey, c.Path, c.Neuter)

cmd/chantools/dumpbackup.go

@@ -11,20 +11,28 @@ import (
 )
 
 type dumpBackupCommand struct {
-	RootKey   string `long:"rootkey" description:"BIP32 HD root key of the wallet that was used to create the backup."`
+	RootKey   string `long:"rootkey" description:"BIP32 HD root key of the wallet that was used to create the backup. Leave empty to prompt for lnd 24 word aezeed."`
 	MultiFile string `long:"multi_file" description:"The lnd channel.backup file to dump."`
 }
 
 func (c *dumpBackupCommand) Execute(_ []string) error {
 	setupChainParams(cfg)
 
-	// Check that root key is valid.
-	if c.RootKey == "" {
-		return fmt.Errorf("root key is required")
+	var (
+		extendedKey *hdkeychain.ExtendedKey
+		err error
+	)
+
+	// Check that root key is valid or fall back to console input.
+	switch {
+	case c.RootKey != "":
+		extendedKey, err = hdkeychain.NewKeyFromString(c.RootKey)
+
+	default:
+		extendedKey, err = rootKeyFromConsole()
 	}
-	extendedKey, err := hdkeychain.NewKeyFromString(c.RootKey)
 	if err != nil {
-		return fmt.Errorf("error parsing root key: %v", err)
+		return fmt.Errorf("error reading root key: %v", err)
 	}
 
 	// Check that we have a backup file.

cmd/chantools/forceclose.go

@@ -19,20 +19,29 @@ import (
 )
 
 type forceCloseCommand struct {
-	RootKey   string `long:"rootkey" description:"BIP32 HD root key to use."`
+	RootKey   string `long:"rootkey" description:"BIP32 HD root key to use. Leave empty to prompt for lnd 24 word aezeed."`
 	ChannelDB string `long:"channeldb" description:"The lnd channel.db file to use for force-closing channels."`
 	Publish   bool   `long:"publish" description:"Should the force-closing TX be published to the chain API?"`
 }
 
 func (c *forceCloseCommand) Execute(_ []string) error {
-	// Check that root key is valid.
-	if c.RootKey == "" {
-		return fmt.Errorf("root key is required")
+	var (
+		extendedKey *hdkeychain.ExtendedKey
+		err error
+	)
+
+	// Check that root key is valid or fall back to console input.
+	switch {
+	case c.RootKey != "":
+		extendedKey, err = hdkeychain.NewKeyFromString(c.RootKey)
+
+	default:
+		extendedKey, err = rootKeyFromConsole()
 	}
-	extendedKey, err := hdkeychain.NewKeyFromString(c.RootKey)
 	if err != nil {
-		return fmt.Errorf("error parsing root key: %v", err)
+		return fmt.Errorf("error reading root key: %v", err)
 	}
+
 	// Check that we have a channel DB.
 	if c.ChannelDB == "" {
 		return fmt.Errorf("rescue DB is required")
@@ -43,7 +52,7 @@ func (c *forceCloseCommand) Execute(_ []string) error {
 	}
 
 	// Parse channel entries from any of the possible input files.
-	entries, err := parseInput(cfg)
+	entries, err := parseInputType(cfg)
 	if err != nil {
 		return err
 	}

cmd/chantools/main.go

@@ -1,12 +1,17 @@
 package main
 
 import (
+	"bufio"
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"github.com/btcsuite/btcutil/hdkeychain"
+	"github.com/lightningnetwork/lnd/aezeed"
+	"golang.org/x/crypto/ssh/terminal"
 	"io/ioutil"
 	"os"
 	"strings"
+	"syscall"
 
 	"github.com/btcsuite/btcd/chaincfg"
 	"github.com/guggero/chantools/dataformat"
@@ -38,7 +43,7 @@ var (
 )
 
 func main() {
-	err := Main()
+	err := runCommandParser()
 	if err == nil {
 		return
 	}
@@ -50,7 +55,7 @@ func main() {
 	os.Exit(0)
 }
 
-func Main() error {
+func runCommandParser() error {
 	setupLogging()
 
 	// Parse command line.
@@ -93,7 +98,7 @@ func Main() error {
 	return err
 }
 
-func parseInput(cfg *config) ([]*dataformat.SummaryEntry, error) {
+func parseInputType(cfg *config) ([]*dataformat.SummaryEntry, error) {
 	var (
 		content []byte
 		err     error
@@ -144,6 +149,57 @@ func readInput(input string) ([]byte, error) {
 	return ioutil.ReadFile(input)
 }
 
+func rootKeyFromConsole() (*hdkeychain.ExtendedKey, error) {
+	// We'll now prompt the user to enter in their 24-word mnemonic.
+	fmt.Printf("Input your 24-word mnemonic separated by spaces: ")
+	reader := bufio.NewReader(os.Stdin)
+	mnemonicStr, err := reader.ReadString('\n')
+	if err != nil {
+		return nil, err
+	}
+
+	// We'll trim off extra spaces, and ensure the mnemonic is all
+	// lower case, then populate our request.
+	mnemonicStr = strings.TrimSpace(mnemonicStr)
+	mnemonicStr = strings.ToLower(mnemonicStr)
+
+	cipherSeedMnemonic := strings.Split(mnemonicStr, " ")
+
+	fmt.Println()
+
+	if len(cipherSeedMnemonic) != 24 {
+		return nil, fmt.Errorf("wrong cipher seed mnemonic "+
+			"length: got %v words, expecting %v words",
+			len(cipherSeedMnemonic), 24)
+	}
+
+	// Additionally, the user may have a passphrase, that will also
+	// need to be provided so the daemon can properly decipher the
+	// cipher seed.
+	fmt.Printf("Input your cipher seed passphrase (press enter if " +
+		"your seed doesn't have a passphrase): ")
+	passphrase, err := terminal.ReadPassword(syscall.Stdin)
+	if err != nil {
+		return nil, err
+	}
+
+	var mnemonic aezeed.Mnemonic
+	copy(mnemonic[:], cipherSeedMnemonic[:])
+
+	// If we're unable to map it back into the ciphertext, then either the
+	// mnemonic is wrong, or the passphrase is wrong.
+	cipherSeed, err := mnemonic.ToCipherSeed(passphrase)
+	if err != nil {
+		return nil, fmt.Errorf("failed to decrypt seed with passphrase"+
+			": %v", err)
+	}
+	rootKey, err := hdkeychain.NewMaster(cipherSeed.Entropy[:], chainParams)
+	if err != nil {
+		return nil, fmt.Errorf("failed to derive master extended key")
+	}
+	return rootKey, nil
+}
+
 func setupChainParams(cfg *config) {
 	if cfg.Testnet {
 		chainParams = &chaincfg.TestNet3Params

cmd/chantools/rescueclosed.go

@@ -32,18 +32,26 @@ type cacheEntry struct {
 }
 
 type rescueClosedCommand struct {
-	RootKey   string `long:"rootkey" description:"BIP32 HD root key to use."`
+	RootKey   string `long:"rootkey" description:"BIP32 HD root key to use. Leave empty to prompt for lnd 24 word aezeed."`
 	ChannelDB string `long:"channeldb" description:"The lnd channel.db file to use for rescuing force-closed channels."`
 }
 
 func (c *rescueClosedCommand) Execute(_ []string) error {
-	// Check that root key is valid.
-	if c.RootKey == "" {
-		return fmt.Errorf("root key is required")
+	var (
+		extendedKey *hdkeychain.ExtendedKey
+		err error
+	)
+
+	// Check that root key is valid or fall back to console input.
+	switch {
+	case c.RootKey != "":
+		extendedKey, err = hdkeychain.NewKeyFromString(c.RootKey)
+
+	default:
+		extendedKey, err = rootKeyFromConsole()
 	}
-	extendedKey, err := hdkeychain.NewKeyFromString(c.RootKey)
 	if err != nil {
-		return fmt.Errorf("error parsing root key: %v", err)
+		return fmt.Errorf("error reading root key: %v", err)
 	}
 
 	// Check that we have a channel DB.
@@ -56,7 +64,7 @@ func (c *rescueClosedCommand) Execute(_ []string) error {
 	}
 
 	// Parse channel entries from any of the possible input files.
-	entries, err := parseInput(cfg)
+	entries, err := parseInputType(cfg)
 	if err != nil {
 		return err
 	}

cmd/chantools/showrootkey.go

@@ -1,65 +1,16 @@
 package main
 
 import (
-	"bufio"
 	"fmt"
-	"os"
-	"strings"
-	"syscall"
-
-	"github.com/btcsuite/btcutil/hdkeychain"
-	"github.com/lightningnetwork/lnd/aezeed"
-	"golang.org/x/crypto/ssh/terminal"
 )
 
 type showRootKeyCommand struct{}
 
 func (c *showRootKeyCommand) Execute(_ []string) error {
-	// We'll now prompt the user to enter in their 24-word mnemonic.
-	fmt.Printf("Input your 24-word mnemonic separated by spaces: ")
-	reader := bufio.NewReader(os.Stdin)
-	mnemonicStr, err := reader.ReadString('\n')
+	rootKey, err := rootKeyFromConsole()
 	if err != nil {
-		return err
-	}
-
-	// We'll trim off extra spaces, and ensure the mnemonic is all
-	// lower case, then populate our request.
-	mnemonicStr = strings.TrimSpace(mnemonicStr)
-	mnemonicStr = strings.ToLower(mnemonicStr)
-
-	cipherSeedMnemonic := strings.Split(mnemonicStr, " ")
-
-	fmt.Println()
-
-	if len(cipherSeedMnemonic) != 24 {
-		return fmt.Errorf("wrong cipher seed mnemonic "+
-			"length: got %v words, expecting %v words",
-			len(cipherSeedMnemonic), 24)
-	}
-
-	// Additionally, the user may have a passphrase, that will also
-	// need to be provided so the daemon can properly decipher the
-	// cipher seed.
-	fmt.Printf("Input your cipher seed passphrase (press enter if " +
-		"your seed doesn't have a passphrase): ")
-	passphrase, err := terminal.ReadPassword(syscall.Stdin)
-	if err != nil {
-		return err
-	}
-
-	var mnemonic aezeed.Mnemonic
-	copy(mnemonic[:], cipherSeedMnemonic[:])
-
-	// If we're unable to map it back into the ciphertext, then either the
-	// mnemonic is wrong, or the passphrase is wrong.
-	cipherSeed, err := mnemonic.ToCipherSeed(passphrase)
-	if err != nil {
-		return err
-	}
-	rootKey, err := hdkeychain.NewMaster(cipherSeed.Entropy[:], chainParams)
-	if err != nil {
-		return fmt.Errorf("failed to derive master extended key")
+		return fmt.Errorf("failed to read root key from console: %v",
+			err)
 	}
 	fmt.Printf("\nYour BIP32 HD root key is: %s\n", rootKey.String())
 	return nil

cmd/chantools/summary.go

@@ -14,7 +14,7 @@ type summaryCommand struct{}
 
 func (c *summaryCommand) Execute(_ []string) error {
 	// Parse channel entries from any of the possible input files.
-	entries, err := parseInput(cfg)
+	entries, err := parseInputType(cfg)
 	if err != nil {
 		return err
 	}

cmd/chantools/sweeptimelock.go

@@ -20,20 +20,28 @@ const (
 )
 
 type sweepTimeLockCommand struct {
-	RootKey     string `long:"rootkey" description:"BIP32 HD root key to use."`
+	RootKey     string `long:"rootkey" description:"BIP32 HD root key to use. Leave empty to prompt for lnd 24 word aezeed."`
 	Publish     bool   `long:"publish" description:"Should the sweep TX be published to the chain API?"`
 	SweepAddr   string `long:"sweepaddr" description:"The address the funds should be sweeped to"`
 	MaxCsvLimit int    `long:"maxcsvlimit" description:"Maximum CSV limit to use. (default 2000)"`
 }
 
 func (c *sweepTimeLockCommand) Execute(_ []string) error {
-	// Check that root key is valid.
-	if c.RootKey == "" {
-		return fmt.Errorf("root key is required")
+	var (
+		extendedKey *hdkeychain.ExtendedKey
+		err error
+	)
+
+	// Check that root key is valid or fall back to console input.
+	switch {
+	case c.RootKey != "":
+		extendedKey, err = hdkeychain.NewKeyFromString(c.RootKey)
+
+	default:
+		extendedKey, err = rootKeyFromConsole()
 	}
-	extendedKey, err := hdkeychain.NewKeyFromString(c.RootKey)
 	if err != nil {
-		return fmt.Errorf("error parsing root key: %v", err)
+		return fmt.Errorf("error reading root key: %v", err)
 	}
 
 	// Make sure sweep addr is set.
@@ -42,7 +50,7 @@ func (c *sweepTimeLockCommand) Execute(_ []string) error {
 	}
 
 	// Parse channel entries from any of the possible input files.
-	entries, err := parseInput(cfg)
+	entries, err := parseInputType(cfg)
 	if err != nil {
 		return err
 	}