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main.go
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main.go
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package main
import (
"flag"
"fmt"
"os"
"strconv"
"strings"
"github.com/manifoldco/promptui"
"github.com/tyler-smith/go-bip39"
"github.com/tyler-smith/go-bip39/wordlists"
)
func exitError(message string, code int) {
fmt.Fprintln(os.Stderr, message)
os.Exit(code)
}
func ordinal(x int) string {
suffix := "th"
switch x % 10 {
case 1:
if x%100 != 11 {
suffix = "st"
}
case 2:
if x%100 != 12 {
suffix = "nd"
}
case 3:
if x%100 != 13 {
suffix = "rd"
}
}
return strconv.Itoa(x) + suffix
}
func main() {
lang := flag.String("lang", "english", "Select mnemonic language (english chinese_simplified chinese_traditional french italian japanese, korean, spanish)")
list := flag.Bool("list", false, "List avaliable words")
build := flag.Bool("build", false, "Build a mnemonic")
flag.Parse()
switch *lang {
case "english":
case "chinese_simplified":
bip39.SetWordList(wordlists.ChineseSimplified)
case "chinese_traditional":
bip39.SetWordList(wordlists.ChineseTraditional)
case "french":
bip39.SetWordList(wordlists.French)
case "italian":
bip39.SetWordList(wordlists.Italian)
case "japanese":
bip39.SetWordList(wordlists.Japanese)
case "korean":
bip39.SetWordList(wordlists.Korean)
case "spanish":
bip39.SetWordList(wordlists.Spanish)
default:
exitError("supported languages: english chinese_simplified chinese_traditional french italian japanese korean spanish", 3)
}
if *list {
fmt.Println(strings.Join(bip39.GetWordList(), " "))
}
if *build {
doBuild()
}
if !*list && !*build {
flag.Usage()
}
}
func doBuild() {
fmt.Println(
`To build your mnemonic, you can hand pick first 23 words of the mnemonic.
List word can be chosen from shorter list, to match correct checksum of your mnemonic.`)
wordlist := bip39.GetWordList()
words := make([]string, 23)
prompt := promptui.Select{
Items: wordlist,
Size: 30,
}
for i := range words {
prompt.Label = fmt.Sprintf("Select %s word", ordinal(i+1))
_, word, err := prompt.Run()
if err != nil {
exitError(err.Error(), 1)
}
words[i] = word
}
first23 := strings.Join(words, " ")
items := make([]string, 0, 8)
for _, word := range wordlist {
_, err := bip39.MnemonicToByteArray(first23 + " " + word)
if err == nil {
items = append(items, word)
}
}
prompt.Label = "Select last word"
prompt.Items = items
_, word, err := prompt.Run()
if err != nil {
exitError(err.Error(), 2)
}
words = append(words, word)
fmt.Println("Your mnemonic:")
fmt.Println(strings.Join(words, " "))
}