Fix core too strongly bound to underlying nodes

ct-app/core/core.py

@@ -99,6 +99,12 @@ def subgraph_safes_balance_url(self, subgraph: SubgraphType) -> str:
 
     async def _retrieve_address(self):
         addresses = await self.api.get_address("all")
+        if not addresses:
+            self.warning("No address retrieved from node.")
+            return
+        if "hopr" not in addresses or "native" not in addresses:
+            self.warning("Invalid address retrieved from node.")
+            return
         self.address = Address(addresses["hopr"], addresses["native"])
 
     @flagguard
@@ -343,7 +349,8 @@ async def distribute_rewards(self):
     async def get_fundings(self):
         from_address = self.params.subgraph.from_address
         ct_safe_addresses = {
-            (await node.api.node_info()).node_safe for node in self.network_nodes
+            getattr(await node.api.node_info(), "node_safe", None)
+            for node in self.network_nodes
         }
 
         transactions = []

ct-app/core/node.py

@@ -245,7 +245,9 @@ async def fund_channels(self):
         ]
 
         low_balances = [
-            c for c in out_opens if int(c.balance)/1e18 <= self.params.channel.min_balance
+            c
+            for c in out_opens
+            if int(c.balance) / 1e18 <= self.params.channel.min_balance
         ]
 
         self.debug(f"Low balance channels: {len(low_balances)}")
@@ -255,7 +257,7 @@ async def fund_channels(self):
         for channel in low_balances:
             if channel.destination_peer_id in peer_ids:
                 ok = await self.api.fund_channel(
-                    channel.channel_id, self.params.channel.funding_amount*1e18
+                    channel.channel_id, self.params.channel.funding_amount * 1e18
                 )
                 if ok:
                     self.debug(f"Funded channel {channel.channel_id}")