fix plot.py

fixes https://github.com/spesmilo/electrum/issues/9058

electrum/plot.py

@@ -1,6 +1,7 @@
 # note: This module takes 1-2 seconds to import. It should be imported *on-demand*.
 
 import datetime
+from decimal import Decimal
 from collections import defaultdict
 
 import matplotlib
@@ -20,15 +21,15 @@ class NothingToPlotException(Exception):
 def plot_history(history):
     if len(history) == 0:
         raise NothingToPlotException()
-    hist_in = defaultdict(int)
-    hist_out = defaultdict(int)
+    hist_in = defaultdict(Decimal)
+    hist_out = defaultdict(Decimal)
     for item in history:
         is_lightning = item.get("lightning", False)
         if not is_lightning and not item['confirmations']:
             continue
         if item['timestamp'] is None:
             continue
-        value = item['value'].value/COIN
+        value = Decimal(item['value'].value)/COIN
         date = item['date']
         datenum = int(md.date2num(datetime.date(date.year, date.month, 1)))
         if value > 0:

electrum/util.py

@@ -238,6 +238,7 @@ class Satoshis(object):
     def __new__(cls, value):
         self = super(Satoshis, cls).__new__(cls)
         # note: 'value' sometimes has msat precision
+        assert isinstance(value, (int, Decimal)), f"unexpected type for {value=!r}"
         self.value = value
         return self
 

electrum/wallet.py

@@ -1389,6 +1389,7 @@ class Abstract_Wallet(ABC, Logger, EventListener):
                         'value': Satoshis(0),
                         'children': [],
                         'timestamp': 0,
+                        'date': timestamp_to_datetime(0),
                         'fee_sat': 0,
                     }
                     transactions[key] = parent
@@ -1403,6 +1404,7 @@ class Abstract_Wallet(ABC, Logger, EventListener):
                     parent['lightning'] = False
                     parent['txid'] = tx_item['txid']
                     parent['timestamp'] = tx_item['timestamp']
+                    parent['date'] = timestamp_to_datetime(tx_item['timestamp'])
                     parent['height'] = tx_item['height']
                     parent['confirmations'] = tx_item['confirmations']
                 parent['children'].append(tx_item)