Add country data to display of service nodes.

To enable:

```
$ sudo apt install python3-geoip2  # or: 'pip install geoip2' for the latest
$ sudo apt install geoipupdate
```

If necessary, sign up for an account with MaxMind:

  https://www.maxmind.com/en/geolite2/signup

Edit `/etc/GeoIP.conf` with the details of your MaxMind account:

```
AccountID 123456
LicenseKey xxxxxxxxxxxxxxxx
EditionIDs GeoLite2-City GeoLite2-ASN
```

Edit `/etc/cron.d/geoipupdate`:

```
 # MaxMind database updates take place on Tuesdays and Fridays.
 #
00 12    * * 2,5   root    test -x /usr/bin/geoipupdate && grep -q '^AccountID .*[^0]\+' /etc/GeoIP.conf && /usr/bin/geoipupdate
```

Edit `./local_config.py`:

```
config.geoip_dir = '/var/lib/GeoIP'
```

local_config.py

@@ -6,3 +6,4 @@ from observer import config
 # Example config override:
 #config.blocks_per_page = 10
 
+config.geoip_dir = '/var/lib/GeoIP'

observer.py

@@ -26,6 +26,7 @@ import sha3
 import config
 import local_config
 from lmq import FutureJSON, omq_connection
+import geoip2.database
 
 # Make a dict of config.* to pass to templating
 conf = {x: getattr(config, x) for x in dir(config) if not x.startswith('__')}
@@ -47,7 +48,6 @@ class Hex64Converter(BaseConverter):
 
 app.url_map.converters['hex64'] = Hex64Converter
 
-
 @app.template_filter('format_datetime')
 def format_datetime(value, format='long'):
     return babel.dates.format_datetime(value, format, tzinfo=babel.dates.get_timezone('UTC'))
@@ -186,10 +186,11 @@ def get_sns_future(omq, oxend):
                     'last_reward_transaction_index', 'active', 'funded', 'earned_downtime_blocks',
                     'service_node_version', 'contributors', 'total_contributed', 'total_reserved',
                     'staking_requirement', 'portions_for_operator', 'operator_address', 'pubkey_ed25519',
-                    'last_uptime_proof', 'state_height', 'swarm_id') } })
+                    'last_uptime_proof', 'state_height', 'swarm_id', 'public_ip') } })
 
 def get_sns(sns_future, info_future):
     info = info_future.get()
+    geoip = geoip2.database.Reader(config.geoip_dir + '/GeoLite2-City.mmdb')
     awaiting_sns, active_sns, inactive_sns = [], [], []
     sn_states = sns_future.get()
     sn_states = sn_states['service_node_states'] if 'service_node_states' in sn_states else []
@@ -197,6 +198,7 @@ def get_sns(sns_future, info_future):
         sn['contribution_open'] = sn['staking_requirement'] - sn['total_reserved']
         sn['contribution_required'] = sn['staking_requirement'] - sn['total_contributed']
         sn['num_contributions'] = sum(len(x['locked_contributions']) for x in sn['contributors'] if 'locked_contributions' in x)
+        sn['country'] = geoip.city(sn['public_ip']).country.names['en']
 
         if sn['active']:
             active_sns.append(sn)
@@ -570,6 +572,8 @@ def show_sn(pubkey, more_details=False):
     hfinfo = FutureJSON(omq, oxend, 'rpc.hard_fork_info', 10)
     sn = sn_req(omq, oxend, pubkey).get()
     quos = get_quorums_future(omq, oxend, info.get()['height'])
+    geoip_c = geoip2.database.Reader(config.geoip_dir + '/GeoLite2-City.mmdb')
+    geoip_a = geoip2.database.Reader(config.geoip_dir + '/GeoLite2-ASN.mmdb')
 
 
     if 'service_node_states' not in sn or not sn['service_node_states']:
@@ -588,6 +592,11 @@ def show_sn(pubkey, more_details=False):
     sn['num_reserved_spots'] = sum(x["amount"] < x["reserved"] for x in sn["contributors"])
     # Available open contribution spots:
     sn['num_open_spots'] = 0 if sn['total_reserved'] >= sn['staking_requirement'] else max(0, 4 - sn['num_contributions'] - sn['num_reserved_spots'])
+    sn['country'] = geoip_c.city(sn['public_ip']).country.names['en']
+    city = geoip_c.city(sn['public_ip']).city
+    if city.names:
+        sn['city'] = city.names['en']
+    sn['asn'] = geoip_a.asn(sn['public_ip']).autonomous_system_organization
 
     if more_details:
         formatter = HtmlFormatter(cssclass="syntax-highlight", style="paraiso-dark")

templates/include/sn_active.html

@@ -8,6 +8,7 @@
             <td title="Can also be the height of the last activation, IP penalty, or recommission">Last Reward Height</td>
             <td>Last Uptime Proof</td>
             <td>Expiry Date UTC (Estimated)</td>
+            <td>Country</td>
         </tr>
     </thead>
 
@@ -28,6 +29,7 @@
                         Staking Infinitely
                     {%endif%}
                 </td>
+                <td>{{sn.country}}</td>
             </tr>
         {%endfor%}
     </tbody>

templates/include/sn_awaiting.html

@@ -9,6 +9,7 @@
             <td>Open For Contribution</td>
             <td>Min. Contribution</td>
             <td>Expiry Date UTC (Estimated)</td>
+            <td>Country</td>
         </tr>
     </thead>
 
@@ -35,6 +36,7 @@
                         Staking Infinitely
                     {%endif%}
                 </td>
+                <td>{{sn.country}}</td>
             </tr>
         {%endfor%}
         {%if limit_awaiting and (awaiting_sns | length) > limit_awaiting%}

templates/include/sn_inactive.html

@@ -7,6 +7,7 @@
             <td>Decommission Height</td>
             <td>Last Uptime Proof</td>
             <td>Blocks until Dereg.</td>
+            <td>Country</td>
         </tr>
     </thead>
 
@@ -19,6 +20,7 @@
                 <td>{%if sn.decomm_blocks_remaining > 0%}{{sn.decomm_blocks_remaining}} ({{(sn.decomm_blocks_remaining * 120) | reltime}})
                         {%-else%}None (deregistration imminent!)
                         {%-endif%}</td>
+                <td>{{sn.country}}</td>
             </tr>
         {%endfor%}
 

templates/sn.html

@@ -19,6 +19,11 @@
         <h4 style="margin:5px"><label>Lokinet Address:</label> {{sn.pubkey_ed25519 | base32z}}.snode</h4>
       {%endif%}
       <h4 style="margin:5px"><label>Operator Address:</label> {{sn.operator_address}}</h4>
+      <h4 style="margin:5px"><label>Country:</label> {{sn.country}}</h4>
+      {%if sn.city %}
+        <h4 style="margin:5px"><label>City:</label> {{sn.city}}</h4>
+      {%endif%}
+      <h4 style="margin:5px"><label>Network:</label> {{sn.asn}}</h4>
     </div>
     <img class="qr" src="/qr/{{sn.service_node_pubkey}}" title="{{sn.service_node_pubkey}}">
   </div>