Add methods for exporting/importing outputs and key images

monero/backends/jsonrpc.py

@@ -1,4 +1,3 @@
-import binascii
 from datetime import datetime
 import operator
 import json
@@ -263,6 +262,23 @@ class JSONRPCWallet(object):
             'blob': data.get('blob', None),
         })
 
+    def export_outputs(self):
+        return self.raw_request('export_outputs')['outputs_data_hex']
+
+    def import_outputs(self, outputs_hex):
+        return self.raw_request(
+            'import_outputs',
+            {'outputs_data_hex': outputs_hex})['num_imported']
+
+    def export_key_images(self):
+        return self.raw_request('export_key_images')['signed_key_images']
+
+    def import_key_images(self, key_images):
+        _data = self.raw_request(
+            'import_key_images',
+            {'signed_key_images': key_images})
+        return (_data['height'], from_atomic(_data['spent']), from_atomic(_data['unspent']))
+
     def transfer(self, destinations, priority, ringsize,
             payment_id=None, unlock_time=0, account=0,
             relay=True):
@@ -341,6 +357,7 @@ _err2exc = {
     -2: exceptions.WrongAddress,
     -5: exceptions.WrongPaymentId,
     -8: exceptions.TransactionNotFound,
+    -9: exceptions.SignatureCheckFailed,
     -16: exceptions.TransactionNotPossible,
     -17: exceptions.NotEnoughMoney,
     -20: exceptions.AmountIsZero,

monero/exceptions.py

@@ -35,3 +35,6 @@ class TransactionBroadcastError(BackendException):
 
 class TransactionNotFound(AccountException):
     pass
+
+class SignatureCheckFailed(MoneroException):
+    pass

monero/wallet.py

@@ -104,6 +104,40 @@ class Wallet(object):
         except TypeError:
             return 0
 
+    def export_outputs(self):
+        """
+        Exports outputs in hexadecimal format.
+
+        :rtype: str
+        """
+        return self._backend.export_outputs()
+
+    def import_outputs(self, outputs_hex):
+        """
+        Imports outputs in hexadecimal format. Returns number of imported outputs.
+
+        :rtype: int
+
+        """
+        return self._backend.import_outputs(outputs_hex)
+
+    def export_key_images(self):
+        """
+        Exports signed key images as a list of dicts.
+
+        :rtype: [dict, dict, ...]
+        """
+        return self._backend.export_key_images()
+
+    def import_key_images(self, key_images_hex):
+        """
+        Imports key images from a list of dicts. Returns tuple of (height, spent, unspent).
+
+        :rtype: (int, Decimal, Decimal)
+
+        """
+        return self._backend.import_key_images(key_images_hex)
+
     # Following methods operate on default account (index=0)
     def balances(self):
         """