ethereum/validator_check.py: for checking status

Useful to sort out slashed validators on Prater.

Signed-off-by: Jakub Sokołowski <jakub@status.im>

ethereum/validator_check.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+import os
+import sys
+import time
+import json
+import requests
+from optparse import OptionParser
+
+HELP_DESCRIPTION='This is a simple utility for querying CloudFlare for DNS entries.'
+HELP_EXAMPLE='Example: ./fqdns.py -d status.im -t CNAME'
+
+class BeaconChainAPI:
+
+    def __init__(self, token, url='https://prater.beaconcha.in/api/'):
+        self.token = token
+        self.url = url
+
+    def _req(self, method, path):
+        try:
+            rval = requests.request(method, self.url+path, headers={'apikey':self.token})
+            rval.raise_for_status()
+        except Exception as ex:
+            print(rval.text)
+            raise ex
+        return rval
+
+    def _get(self, path):
+        return self._req('GET', path)
+
+    def health(self):
+        return self._get('healthz').text
+
+    def validator(self, index):
+        return self._get('v1/validator/%s' % index).json()
+
+def parse_opts():
+    parser = OptionParser(description=HELP_DESCRIPTION, epilog=HELP_EXAMPLE)
+    parser.add_option('-u', '--url', default='https://prater.beaconcha.in/api/',
+                      help='format records as a csv file.')
+    parser.add_option('-t', '--token', default=os.environ['BEACON_CHAIN_TOKEN'],
+                      help='Beaconcha.in API token, sourced from BEACON_CHAIN_TOKEN env var.')
+    
+    return parser.parse_args()
+
+def main():
+    (opts, args) = parse_opts()
+
+    api = BeaconChainAPI(opts.token, opts.url)
+
+    for line in sys.stdin:
+        val_id = line.rstrip()
+        rval = api.validator(val_id)
+        print(json.dumps({
+            'id': val_id,
+            'status': rval['data']['status'],
+            'slashed': rval['data']['slashed'],
+            'balance': rval['data']['balance'],
+        }))
+        time.sleep(6)
+
+if __name__ == '__main__':
+    main()