labels plugin: no need for 'proxy_set' callback

electrum/plugins/labels/labels.py

@@ -10,6 +10,8 @@ from electrum.plugin import BasePlugin, hook
 from electrum.crypto import aes_encrypt_with_iv, aes_decrypt_with_iv
 from electrum.i18n import _
 from electrum.util import log_exceptions, ignore_exceptions, make_aiohttp_session
+from electrum.network import Network
+
 
 class LabelsPlugin(BasePlugin):
 
@@ -17,7 +19,6 @@ class LabelsPlugin(BasePlugin):
         BasePlugin.__init__(self, parent, config, name)
         self.target_host = 'labels.electrum.org'
         self.wallets = {}
-        self.proxy = None
 
     def encode(self, wallet, msg):
         password, iv, wallet_id = self.wallets[wallet]
@@ -65,13 +66,17 @@ class LabelsPlugin(BasePlugin):
 
     async def do_get(self, url = "/labels"):
         url = 'https://' + self.target_host + url
-        async with make_aiohttp_session(self.proxy) as session:
+        network = Network.get_instance()
+        proxy = network.proxy if network else None
+        async with make_aiohttp_session(proxy) as session:
             async with session.get(url) as result:
                 return await result.json()
 
     async def do_post(self, url = "/labels", data=None):
         url = 'https://' + self.target_host + url
-        async with make_aiohttp_session(self.proxy) as session:
+        network = Network.get_instance()
+        proxy = network.proxy if network else None
+        async with make_aiohttp_session(proxy) as session:
             async with session.post(url, json=data) as result:
                 try:
                     return await result.json()
@@ -160,14 +165,6 @@ class LabelsPlugin(BasePlugin):
         self.wallets[wallet] = (password, iv, wallet_id)
         # If there is an auth token we can try to actually start syncing
         asyncio.run_coroutine_threadsafe(self.pull_safe_thread(wallet, False), wallet.network.asyncio_loop)
-        self.proxy = wallet.network.proxy
-        wallet.network.register_callback(self.set_proxy, ['proxy_set'])
 
     def stop_wallet(self, wallet):
-        if not wallet.network: return  # 'offline' mode
-        wallet.network.unregister_callback('proxy_set')
         self.wallets.pop(wallet, None)
-
-    def set_proxy(self, evt_name, new_proxy):
-        self.proxy = new_proxy
-        self.print_error("proxy set")