display and encode only hex with OP_RETURN

gui/qt/paytoedit.py

@@ -66,17 +66,17 @@ class PayToEdit(ScanQRTextEdit):
         self.setStyleSheet("QWidget { background-color:#ffcccc;}")
 
     def parse_address_and_amount(self, line):
-        m = re.match('^OP_RETURN\s+"(.+)"$', line.strip())
+        m = re.match('^OP_RETURN\s+([0-9a-fA-F]+)$', line.strip())
         if m:
-            type = 'op_return'
-            address = m.group(1)
+            _type = 'op_return'
+            address = m.group(1).decode('hex')
             amount = 0
         else:
             x, y = line.split(',')
-            type = 'address'
+            _type = 'address'
             address = self.parse_address(x)
             amount = self.parse_amount(y)
-        return type, address, amount
+        return _type, address, amount
 
 
     def parse_amount(self, x):

lib/transaction.py

@@ -757,10 +757,7 @@ class Transaction:
             elif type == 'pubkey':
                 addr = public_key_to_bc_address(x.decode('hex'))
             elif type == 'op_return':
-                try:
-                    addr = 'OP_RETURN: "' + x.decode('utf8') + '"'
-                except:
-                    addr = 'OP_RETURN: "' + x.encode('hex') + '"'
+                addr = 'OP_RETURN ' + x.encode('hex')
             else:
                 addr = "(None)"
             o.append((addr,v))      # consider using yield (addr, v)