[monitor] Add uptime

main.py

@@ -161,6 +161,9 @@ def create_tasks(client, window):
                     monitorview.on_estimatesmartfee, 15.0, params=[5]),
         poll_client(client, "estimatesmartfee",
                     monitorview.on_estimatesmartfee, 15.0, params=[10]),
+        # This is a bit lazy because we could just do it once and calculate it.
+        poll_client(client, "uptime",
+                    monitorview.on_uptime, 5.0, params=[10]),
         tick(on_tick, 1.0),
         handle_hotkeys(window, footerview.on_mode_change, on_window_resize)
     ]

monitor.py

@@ -27,6 +27,7 @@ class MonitorView(object):
         self._mempoolinfo = None  # raw mempoolinfo
         self._estimatesmartfee = {} # blocks -> feerate/kB
         self._dt = None
+        self._uptime = None # raw uptime from bitcoind (seconds)
 
         self._window_size = MIN_WINDOW_SIZE
 
@@ -128,6 +129,9 @@ class MonitorView(object):
             )
             self._pad.addstr(11, 1, "estimatesmartfee: {}".format(estimates))
 
+        if self._uptime:
+            self._pad.addstr(13, 1, "uptime: {}".format(datetime.timedelta(seconds=self._uptime)))
+
         self._draw_pad_to_screen()
 
     def _draw_pad_to_screen(self):
@@ -193,6 +197,15 @@ class MonitorView(object):
         if self._visible:
             await self.draw()
 
+    async def on_uptime(self, key, obj):
+        try:
+            self._uptime = obj["result"]
+        except KeyError:
+            return
+
+        if self._visible:
+            await self.draw()
+
     async def on_mode_change(self, newmode):
         if newmode != "monitor":
             self._visible = False