infra: Add script for syncing headers

infra/misc/sync_headers.py

@@ -0,0 +1,26 @@
+#!/bin/python
+#
+# Traverses all headers for a single coin.
+
+import requests
+import sys
+
+base_url = 'https://xsnexplorer.io/api'
+
+def get_next(coin, last_seen_hash = ''):
+    url = base_url + '/' + coin + '/blocks/headers?limit=1000'
+    if last_seen_hash != '':
+        url = url + '&lastSeenHash=' + last_seen_hash
+    return requests.get(url).json()
+
+def get_all(coin, trace = '', last_seen_hash = ''):
+    print('getting from ' + trace)
+    data = get_next(coin, last_seen_hash)['data']
+    if len(data) == 0:
+        print('done\n')
+    else:
+        get_all(coin, str(data[-1]['height']), data[-1]['hash'])
+
+if __name__ == "__main__":
+    sys.setrecursionlimit(999999999)
+    get_all('ltc', '0')