partial commit to fix wallet utils

this commit provide a lot of changes in will-settings including export to ics calendar file.

bal.py

@@ -1,14 +1,13 @@
 import os
-
+from datetime import date, datetime, timedelta
+import platform
 # import random
 # import zipfile as zipfile_lib
-
-from electrum import json_db
+from electrum import constants, json_db
 from electrum.logging import get_logger
 from electrum.plugin import BasePlugin
 from electrum.transaction import tx_from_any
 
-
 _logger = get_logger(__name__)
 def get_will_settings(x):
     # print(x)
@@ -50,6 +49,12 @@ class BalConfig:
 class BalPlugin(BasePlugin):
     _version=None
     __version__ = "0.2.8" #AUTOMATICALLY GENERATED DO NOT EDIT
+    default_app={
+            "Linux":"xdg-open",
+            "Window":"start",
+            "Darwin":"open"
+    }
+    chainname = constants.net.NET_NAME if constants.net.NET_NAME != "mainnet" else "bitcoin"
     def version(self):
         if not self._version:
             try:
@@ -60,7 +65,7 @@ class BalPlugin(BasePlugin):
             except Exception as e:
                 _logger.error(f"failed to get version: {e}")
                 self._version="unknown"
-        return self._version        
+        return self._version
 
     SIZE = (159, 97)
 
@@ -101,6 +106,7 @@ class BalPlugin(BasePlugin):
         self.HIDE_INVALIDATED = BalConfig(config, "bal_hide_invalidated", True)
         self.ALLOW_REPUSH = BalConfig(config, "bal_allow_repush", True)
         self.FIRST_EXECUTION = BalConfig(config, "bal_first_execution", True)
+        self.WELIST_SERVER = BalConfig(config,"bal_welist_server","https://welist.bitcoin-after.life/")
         self.WILLEXECUTORS = BalConfig(
             config,
             "bal_willexecutors",
@@ -123,18 +129,33 @@ class BalPlugin(BasePlugin):
                         "selected": True,
                     }
                 },
+                "testnet4": {
+                    "https://we.bitcoin-after.life": {
+                        "base_fee": 100000,
+                        "status": "New",
+                        "info": "Bitcoin After Life Will Executor",
+                        "address": "bcrt1qa5cntu4hgadw8zd3n6sq2nzjy34sxdtd9u0gp7",
+                        "selected": True,
+                    }
+                },
+                "regtest": {
+                    "https://we.bitcoin-after.life": {
+                        "base_fee": 100000,
+                        "status": "New",
+                        "info": "Bitcoin After Life Will Executor",
+                        "address": "bcrt1qa5cntu4hgadw8zd3n6sq2nzjy34sxdtd9u0gp7",
+                        "selected": True,
+                    }
+                },
             },
         )
         self.WILL_SETTINGS = BalConfig(
             config,
             "bal_will_settings",
-            {
-                "baltx_fees": 100,
-                "threshold": "180d",
-                "locktime": "1y",
-            },
+            BalPlugin.default_will_settings(),
         )
-
+        self.system = platform.system()
+        self.CALENDAR_APP = BalConfig(config,"bal_open_app",self.default_app[self.system])
         self._hide_invalidated = self.HIDE_INVALIDATED.get()
         self._hide_replaced = self.HIDE_REPLACED.get()
 
@@ -150,15 +171,22 @@ class BalPlugin(BasePlugin):
         self.HIDE_REPLACED.set(self._hide_replaced)
 
     def validate_will_settings(self, will_settings):
+        defaults=BalPlugin.default_will_settings()
         if not will_settings:
             will_settings=[]
-        if int(will_settings.get("baltx_fees", 1)) < 1:
-            will_settings["baltx_fees"] = 1
+        if int(will_settings.get("baltx_fees", 0)) < 1:
+            will_settings["baltx_fees"] = defaults['baltx_fees']
         if not will_settings.get("threshold"):
-            will_settings["threshold"] = "180d"
+            will_settings["threshold"] = defaults['threshold']
         if not will_settings.get("locktime"):
-            will_settings["locktime"] = "1y"
+            will_settings["locktime"] = defaults['locktime']
         return will_settings
 
-    def default_will_settings(self):
-        return {"baltx_fees": 100, "threshold": "180d", "locktime": "1y"}
+    @staticmethod
+    def default_will_settings():
+        today = date.today()
+        dt = datetime(today.year, today.month, today.day, 0, 0, 0)
+        threshold =(dt + timedelta(days=180)).timestamp()
+        locktime =(dt + timedelta(days=365)).timestamp()
+
+        return {"baltx_fees": 100, "threshold": threshold, "locktime": locktime}