fix ledger signing. fix dbb 2fa. follow-up partial txn ser change (#4405)

plugins/digitalbitbox/digitalbitbox.py

@@ -559,7 +559,7 @@ class DigitalBitbox_KeyStore(Hardware_KeyStore):
                             # expected serialization though, so we leave it here until we activate it.
                             return '00' + push_script(Transaction.get_preimage_script(txin))
                         raise Exception("unsupported type %s" % txin['type'])
-                tx_dbb_serialized = CustomTXSerialization(tx.serialize()).serialize()
+                tx_dbb_serialized = CustomTXSerialization(tx.serialize()).serialize_to_network()
             else:
                 # We only need this for the signing echo / verification.
                 tx_dbb_serialized = None

plugins/ledger/ledger.py

@@ -429,7 +429,7 @@ class Ledger_KeyStore(Hardware_KeyStore):
             # Sign all inputs
             firstTransaction = True
             inputIndex = 0
-            rawTx = tx.serialize()
+            rawTx = tx.serialize_to_network()
             self.get_client().enableAlternate2fa(False)
             if segwitTransaction:
                 self.get_client().startUntrustedTransaction(True, inputIndex,