Added network functions

moto/managedblockchain/utils.py

@@ -0,0 +1,23 @@
+import random
+import string
+
+from six.moves.urllib.parse import urlparse
+
+
+def region_from_managedblckchain_url(url):
+    domain = urlparse(url).netloc
+
+    if "." in domain:
+        return domain.split(".")[1]
+    else:
+        return "us-east-1"
+
+
+def networkid_from_managedblockchain_url(full_url):
+    return full_url.split("/")[-1]
+
+
+def get_network_id():
+    return "n-" + "".join(
+        random.choice(string.ascii_uppercase + string.digits) for _ in range(26)
+    )