fix: edge case for no agent for service

app.py

@@ -60,12 +60,13 @@ def fetch_and_aggregate_transactions():
         for service_id in range(1, total_services + 1):
             service = service_registry.functions.getService(service_id).call()
             agent_ids = service[-1]
+            print('--------DEBUG 1-------', service_id)
             if 40 in agent_ids or 25 in agent_ids:
-                agent_instances = service_registry.functions.getAgentInstances(service_id).call()[1][0]
-                if not agent_instances:
-                    print(f"No agent address found for service ID: {service_id}")
-                    continue 
-                agent_address = agent_instances[0]
+                agent_instance_data = service_registry.functions.getAgentInstances(service_id).call()
+                agent_addresses = agent_instance_data[1]
+                if agent_addresses:
+                    agent_address = agent_addresses[0]
+                    print('--------DEBUG 2-------', service_id, agent_address)
                 response_transfers = get_transfers("valory", agent_address)
                 transfers = response_transfers.get("transfers", [])
                 
@@ -321,7 +322,7 @@ def create_visualizations():
             marker_color='blue'
         ),
         go.Bar(
-            name='Total Weekly Nr of Registered Agents',
+            name='Weekly Nr of Registered Agents',
             x=weekly_merged_df['date'],
             y=weekly_merged_df['weekly_agent_count'],
             opacity=0.7,
@@ -341,12 +342,15 @@ def create_visualizations():
             ticktext=[d.strftime("%b %d") for d in weekly_merged_df['date']],
             tickangle=-45
         ),
-        bargap=0.6,
+        bargap=0.3,
         height=600,
         width=1200,
-        margin=dict(l=50, r=50, t=50, b=50),
         showlegend=True,
-        template='plotly_white'
+        legend=dict(
+            yanchor="top",
+            xanchor="right",
+        ),
+        template='plotly_white',
     )
 
     return fig_swaps_chain, fig_bridges_chain, fig_agents_registered,fig_tvl