feat: machine performance indicators

lib/plugins.js

@@ -289,6 +289,23 @@ function plugins (settings, deviceId) {
     ])
   }
 
+  function pruneMachinesHeartbeat () {
+    const sql = `DELETE 
+      FROM 
+        machine_network_heartbeat h
+      USING (SELECT
+                device_id,
+                max(created) as lastEntry
+              FROM 
+                machine_network_heartbeat
+              GROUP BY 
+                device_id) d
+      WHERE
+          d.device_id = h.device_id
+          AND h.created < d.lastEntry`
+    db.none(sql)
+  }
+
   function isHd (tx) {
     return wallet.isHd(settings, tx)
   }
@@ -795,7 +812,8 @@ function plugins (settings, deviceId) {
     sell,
     getNotificationConfig,
     notifyOperator,
-    fetchCurrentConfigVersion
+    fetchCurrentConfigVersion,
+    pruneMachinesHeartbeat
   }
 }