Signature...

lib/ucoinpy/documents/__init__.py

@@ -24,7 +24,7 @@ class Document:
         '''
         self.signatures = []
         for k in keys:
-            self.signatures.append(k.sign(self.raw(), Base64Encoder))
+            self.signatures.append(k.signature(self.raw()))
 
     def signed_raw(self):
         '''

lib/ucoinpy/key/__init__.py

@@ -27,7 +27,6 @@ class SigningKey(NaclSigningKey):
         super().__init__(seed)
         self.pubkey = Base58Encoder.encoder(self.vk)
 
-
 class Base58Encoder(object):
     @staticmethod
     def encode(data):