wallet: allow to create accounts from encrypted WIFs

pkg/wallet/account.go

@@ -150,6 +150,19 @@ func NewAccountFromWIF(wif string) (*Account, error) {
 	return newAccountFromPrivateKey(privKey), nil
 }
 
+// NewAccountFromEncryptedWIF creates a new Account from the given encrypted WIF.
+func NewAccountFromEncryptedWIF(wif string, pass string) (*Account, error) {
+	priv, err := keys.NEP2Decrypt(wif, pass)
+	if err != nil {
+		return nil, err
+	}
+
+	a := newAccountFromPrivateKey(priv)
+	a.EncryptedWIF = wif
+
+	return a, nil
+}
+
 // newAccountFromPrivateKey creates a wallet from the given PrivateKey.
 func newAccountFromPrivateKey(p *keys.PrivateKey) *Account {
 	pubKey := p.PublicKey()

pkg/wallet/account_test.go

@@ -49,6 +49,19 @@ func TestNewFromWif(t *testing.T) {
 	}
 }
 
+func TestNewAccountFromEncryptedWIF(t *testing.T) {
+	for _, tc := range keytestcases.Arr {
+		acc, err := NewAccountFromEncryptedWIF(tc.EncryptedWif, tc.Passphrase)
+		if tc.Invalid {
+			assert.Error(t, err)
+			continue
+		}
+
+		assert.NoError(t, err)
+		compareFields(t, tc, acc)
+	}
+}
+
 func TestContract_MarshalJSON(t *testing.T) {
 	var c Contract