btc+lnd: allow to paste seed with numbers, dots and spaces from lnd backup output

btc/bip39.go

@@ -30,7 +30,7 @@ func ReadMnemonicFromTerminal(params *chaincfg.Params) (*hdkeychain.ExtendedKey,
 	fmt.Println()
 
 	// We'll trim off extra spaces, and ensure the mnemonic is all
-	// lower case, then populate our request.
+	// lower case.
 	mnemonicStr = strings.TrimSpace(mnemonicStr)
 	mnemonicStr = strings.ToLower(mnemonicStr)
 

lnd/aezeed.go

@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"fmt"
 	"os"
+	"regexp"
 	"strings"
 	"syscall"
 	"time"
@@ -14,6 +15,11 @@ import (
 	"golang.org/x/crypto/ssh/terminal"
 )
 
+var (
+	numberDotsRegex = regexp.MustCompile("[\\d.\\-\\n\\r\\t]*")
+	multipleSpaces  = regexp.MustCompile(" [ ]+")
+)
+
 func ReadAezeedFromTerminal(params *chaincfg.Params) (*hdkeychain.ExtendedKey,
 	time.Time, error) {
 
@@ -26,10 +32,17 @@ func ReadAezeedFromTerminal(params *chaincfg.Params) (*hdkeychain.ExtendedKey,
 	}
 
 	// We'll trim off extra spaces, and ensure the mnemonic is all
-	// lower case, then populate our request.
+	// lower case.
 	mnemonicStr = strings.TrimSpace(mnemonicStr)
 	mnemonicStr = strings.ToLower(mnemonicStr)
 
+	// To allow the tool to also accept the copy/pasted version of the
+	// backup text (which contains numbers and dots and multiple spaces),
+	// we do some more cleanup with regex.
+	mnemonicStr = numberDotsRegex.ReplaceAllString(mnemonicStr, "")
+	mnemonicStr = multipleSpaces.ReplaceAllString(mnemonicStr, " ")
+	mnemonicStr = strings.TrimSpace(mnemonicStr)
+	
 	cipherSeedMnemonic := strings.Split(mnemonicStr, " ")
 
 	fmt.Println()