Start BTC RPC Explorer after Electrs

rootfs/standard/etc/systemd/system/btc_rpc_explorer.service

@@ -8,6 +8,7 @@ After=bitcoind.service
 
 [Service]
 ExecStartPre=/usr/bin/wait_on_bitcoin.sh
+ExecStartPre=/usr/bin/wait_on_electrs.sh
 WorkingDirectory=/opt/mynode/btc-rpc-explorer
 ExecStart=/usr/bin/npm start
 

rootfs/standard/usr/bin/wait_on_electrs.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+set -x
+set -e
+
+# Wait to see if bitcoind is synced
+echo "Checking if electrum server is ready is synced..."
+while [ ! -f "/tmp/electrs_up_to_date" ]; do
+    echo "electrs not synced, sleeping 1m"
+    /bin/sleep 30s
+done
+
+exit 0

rootfs/standard/var/www/mynode/electrum_info.py

@@ -4,6 +4,7 @@ import subprocess
 import requests
 import socket
 import json
+import os
 
 
 electrum_server_current_block = None
@@ -15,6 +16,7 @@ def get_electrum_server_current_block():
 
 def update_electrs_info():
     global electrum_server_current_block
+    global electrs_active
 
     try:
         raw_data = requests.get("http://localhost:4224")
@@ -23,6 +25,12 @@ def update_electrs_info():
             for sample in family.samples:
                 if sample.name == "electrs_index_height":
                     electrum_server_current_block = int(sample.value)
+
+        bitcoin_block_height = get_bitcoin_block_height()
+        if electrum_server_current_block != None and bitcoin_block_height != None:
+            if electrum_server_current_block > bitcoin_block_height - 2:
+                os.system("touch /tmp/electrs_up_to_date")
+                electrs_active = True
     except:
         pass
 

rootfs/standard/var/www/mynode/mynode.py

@@ -299,11 +299,16 @@ def index():
         # Find btc-rpc-explorer status
         btcrpcexplorer_status = "BTC RPC Explorer"
         if is_btcrpcexplorer_enabled():
-            status = os.system("systemctl status btc_rpc_explorer --no-pager")
-            if status != 0:
-                btcrpcexplorer_status_color = "red"
+            if is_electrs_active():
+                status = os.system("systemctl status btc_rpc_explorer --no-pager")
+                if status != 0:
+                    btcrpcexplorer_status_color = "red"
+                else:
+                    btcrpcexplorer_status_color = "green"
+                    btcrpcexplorer_ready = True
             else:
                 btcrpcexplorer_status_color = "green"
+                btcrpcexplorer_status = "Waiting on electrs..."
 
         # Find explorer status
         explorer_status_color = electrs_status_color

rootfs/standard/var/www/mynode/templates/includes/apps_standard.html

@@ -59,9 +59,13 @@
         <div class="app_status">{{ btcrpcexplorer_status }}</div>
         <div class="app_contents">
             {% if btcrpcexplorer_enabled %}
-            <a class="ui-button ui-widget ui-corner-all mynode_button" href="#" id="btcrpcexplorer">Explorer</a>
+                {% if btcrpcexplorer_ready %}
+                    <a class="ui-button ui-widget ui-corner-all mynode_button" href="#" id="btcrpcexplorer">Explorer</a>
+                    <a class="ui-button ui-widget ui-corner-all mynode_button" href="#" id="toggle-btcrpcexplorer">Disable</a>
+                {% endif %}
+            {% else %}
+                <a class="ui-button ui-widget ui-corner-all mynode_button" href="#" id="toggle-btcrpcexplorer">Enable</a>
             {% endif %}
-            <a class="ui-button ui-widget ui-corner-all mynode_button" href="#" id="toggle-btcrpcexplorer">{% if btcrpcexplorer_enabled %}Disable{% else %}Enable{% endif %}</a>
         </div>
     </div>
     <div class="app_tile">