handle empty result

web3_proxy/src/bin/web3_proxy_cli/sentryd/compare.rs

@@ -184,11 +184,15 @@ async fn check_rpc(
         Ok(abbreviated)
     } else if let Some(result) = response.error {
         Err(anyhow!(
-            "Failed parsing response from {} as JSON: {:?}",
+            "jsonrpc error during check_rpc from {}: {:#}",
             rpc,
-            result
+            json!(result),
         ))
     } else {
-        unimplemented!("{:?}", response)
+        Err(anyhow!(
+            "empty result during check_rpc from {}: {:#}",
+            rpc,
+            json!(response)
+        ))
     }
 }

web3_proxy/src/bin/web3_proxy_cli/sentryd/mod.rs

@@ -152,7 +152,14 @@ impl SentrydSubCommand {
         }
         // check any other web3-proxy /health endpoints
         for other_web3_proxy in other_proxy.iter() {
-            let url = format!("{}/health", other_web3_proxy);
+            let url = if other_web3_proxy.contains("/rpc/") {
+                let x = other_web3_proxy.split("/rpc/").next().unwrap();
+
+                format!("{}/health", x)
+            } else {
+                format!("{}/health", other_web3_proxy)
+            };
+
             let error_sender = error_sender.clone();
 
             let loop_f = a_loop(