hardware: store derivation instead of account_id

lib/base_wizard.py

@@ -176,8 +176,9 @@ class BaseWizard(object):
         self.account_id_dialog(run_next=f)
 
     def on_hardware_account_id(self, account_id):
-        from keystore import load_keystore
-        self.storage.put('account_id', int(account_id))
+        from keystore import load_keystore, bip44_derivation
+        derivation = bip44_derivation(int(account_id))
+        self.storage.put('derivation', derivation)
         name = self.storage.get('hardware_type')
         plugin = self.plugins.get_plugin(name)
         plugin.on_create_wallet(self.storage, self)

lib/keystore.py

@@ -644,6 +644,8 @@ is_any_key = lambda x: is_old_mpk(x) or is_xprv(x) or is_xpub(x) or is_address_l
 is_private_key = lambda x: is_xprv(x) or is_private_key_list(x)
 is_bip32_key = lambda x: is_xprv(x) or is_xpub(x)
 
+def bip44_derivation(account_id):
+    return "m/44'/0'/%d'"% int(account_id)
 
 def from_seed(seed, password):
     if is_old_seed(seed):

lib/storage.py

@@ -36,6 +36,7 @@ import stat
 from i18n import _
 from util import NotEnoughFunds, PrintError, profiler
 from plugins import run_hook, plugin_loaders
+from keystore import bip44_derivation
 
 class WalletStorage(PrintError):
 
@@ -188,7 +189,7 @@ class WalletStorage(PrintError):
                 storage2.put('accounts', {'0': x})
                 # need to save derivation and xpub too
                 storage2.put('master_public_keys', {'x/': xpub})
-                storage2.put('account_id', k)
+                storage2.put('derivation', bip44_derivation(k))
                 storage2.write()
                 result.append(new_path)
         else:
@@ -218,7 +219,7 @@ class WalletStorage(PrintError):
         self.put('hardware_type', wallet_type)
         xpub = self.get('master_public_keys')["x/0'"]
         self.put('master_public_keys', {'x/': xpub})
-        self.put('account_id', 0)
+        self.put('derivation', bip44_derivation(0))
 
     def convert_imported(self, test):
         # '/x' is the internal ID for imported accounts