Trezor: all four available device initializations

Trezor and KeepKey devices can now be initialized by:
- device-generated seed
- existing seed
- BIP39 mnemonic
- master private key

lib/wizard.py

@@ -48,7 +48,7 @@ class WizardBase(PrintError):
         ('multisig',  _("Multi-signature wallet")),
         ('hardware',  _("Hardware wallet")),
     ]
-
+    TIM_NEW, TIM_RECOVER, TIM_MNEMONIC, TIM_PRIVKEY = range(0, 4)
 
     # Derived classes must set:
     #   self.language_for_seed
@@ -103,14 +103,21 @@ class WizardBase(PrintError):
         dynamic feedback.  If not provided, Wallet.is_any is used."""
         raise NotImplementedError
 
-    def request_trezor_reset_settings(self, device):
-        """Ask the user how they want to initialize a trezor compatible
-        device.  device is the device kind, e.g. "Keepkey", to be used
-        in dialog messages.  Returns a 4-tuple: (strength, label,
-        pinprotection, passphraseprotection).  Strength is 0, 1 or 2
-        for a 12, 18 or 24 word seed, respectively.  Label is a name
-        to give the device.  PIN protection and passphrase protection
-        are booleans and should default to True and False respectively."""
+    def request_trezor_init_settings(self, method, device):
+        """Ask the user for the information needed to initialize a trezor-
+        compatible device.  Method is one of the TIM_ trezor init
+        method constants.  TIM_NEW and TIM_RECOVER should ask how many
+        seed words to use, and return 0, 1 or 2 for a 12, 18 or 24
+        word seed respectively.  TIM_MNEMONIC should ask for a
+        mnemonic.  TIM_PRIVKEY should ask for a master private key.
+        All four methods should additionally ask for a name to label
+        the device, PIN information and whether passphrase protection is
+        to be enabled (True/False, default to False).  For TIM_NEW and
+        TIM_RECOVER, the pin information is whether pin protection
+        is required (True/False, default to True); for TIM_MNEMONIC and
+        TIM_PRIVKEY is is the pin as a string of digits 1-9.
+        The result is a 4-tuple: (TIM specific data, label, pininfo,
+        passphraseprotection)."""
         raise NotImplementedError
 
     def request_many(self, n, xpub_hot=None):