Merge pull request ethereum#43 from ethersphere/develop

inline mnemonic wordlist to support binary builds without extra asset

ethcrypto/mnemonic.go

@@ -2,37 +2,9 @@ package ethcrypto
 
 import (
 	"fmt"
-	"io/ioutil"
-	"os"
-	"path"
-	"path/filepath"
 	"strconv"
-	"strings"
 )
 
-func InitWords(wordsPath string) {
-	filename := path.Join(wordsPath, "mnemonic.words.lst")
-	if _, err := os.Stat(filename); os.IsNotExist(err) {
-		dir := path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "eth-go", "ethcrypto")
-		filename = path.Join(dir, "mnemonic.words.lst")
-		if _, err := os.Stat(filename); os.IsNotExist(err) {
-			dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
-			if err != nil {
-				panic(fmt.Errorf("problem getting current folder: ", err))
-			}
-			filename = path.Join(dir, "mnemonic.words.lst")
-		}
-	}
-
-	content, err := ioutil.ReadFile(filename)
-	if err != nil {
-		panic(fmt.Errorf("All options for finding the mnemonic word list file 'mnemonic.words.lst' failed: ", err))
-	}
-	words = strings.Split(string(content), "\n")
-}
-
-var words []string
-
 // TODO: See if we can refactor this into a shared util lib if we need it multiple times
 func IndexOf(slice []string, value string) int64 {
 	for p, v := range slice {
@@ -45,30 +17,30 @@ func IndexOf(slice []string, value string) int64 {
 
 func MnemonicEncode(message string) []string {
 	var out []string
-	n := int64(len(words))
+	n := int64(len(MnemonicWords))
 
 	for i := 0; i < len(message); i += (len(message) / 8) {
 		x := message[i : i+8]
 		bit, _ := strconv.ParseInt(x, 16, 64)
 		w1 := (bit % n)
 		w2 := ((bit / n) + w1) % n
 		w3 := ((bit / n / n) + w2) % n
-		out = append(out, words[w1], words[w2], words[w3])
+		out = append(out, MnemonicWords[w1], MnemonicWords[w2], MnemonicWords[w3])
 	}
 	return out
 }
 
 func MnemonicDecode(wordsar []string) string {
 	var out string
-	n := int64(len(words))
+	n := int64(len(MnemonicWords))
 
 	for i := 0; i < len(wordsar); i += 3 {
 		word1 := wordsar[i]
 		word2 := wordsar[i+1]
 		word3 := wordsar[i+2]
-		w1 := IndexOf(words, word1)
-		w2 := IndexOf(words, word2)
-		w3 := IndexOf(words, word3)
+		w1 := IndexOf(MnemonicWords, word1)
+		w2 := IndexOf(MnemonicWords, word2)
+		w3 := IndexOf(MnemonicWords, word3)
 
 		y := (w2 - w1) % n
 		z := (w3 - w2) % n