nip06 package for key derivation.

nip06/nip06.go

@@ -0,0 +1,56 @@
+package nip06
+
+import (
+	"encoding/hex"
+
+	"github.com/tyler-smith/go-bip32"
+	"github.com/tyler-smith/go-bip39"
+)
+
+func GenerateSeedWords() (string, error) {
+	entropy, err := bip39.NewEntropy(256)
+	if err != nil {
+		return "", err
+	}
+
+	words, err := bip39.NewMnemonic(entropy)
+	if err != nil {
+		return "", err
+	}
+
+	return words, nil
+}
+
+func SeedFromWords(words string) []byte {
+	return bip39.NewSeed(words, "")
+}
+
+func PrivateKeyFromSeed(seed []byte) (string, error) {
+	key, err := bip32.NewMasterKey(seed)
+	if err != nil {
+		return "", err
+	}
+
+	derivationPath := []uint32{
+		bip32.FirstHardenedChild + 44,
+		bip32.FirstHardenedChild + 1237,
+		bip32.FirstHardenedChild + 0,
+		0,
+		0,
+	}
+
+	next := key
+	for _, idx := range derivationPath {
+		var err error
+		next, err = next.NewChildKey(idx)
+		if err != nil {
+			return "", err
+		}
+	}
+
+	return hex.EncodeToString(next.Key), nil
+}
+
+func ValidateWords(words string) bool {
+	return bip39.IsMnemonicValid(words)
+}