diff --git a/corrlib/tools.py b/corrlib/tools.py
index 337912e..e8a9c18 100644
--- a/corrlib/tools.py
+++ b/corrlib/tools.py
@@ -17,3 +17,20 @@ def m2k(m):
 
 def k2m(k):
     return (1/(2*k))-4
+
+
+def record2name_key(record_path: str):
+    file = record_path.split("::")[0]
+    key = record_path.split("::")[1]
+    return file, key
+
+
+def name_key2record(name: str, key: str):
+    return name + "::" + key
+
+
+def make_version_hash(path, record):
+    file, key = record2name_key(record)
+    with open(os.path.join(path, file), 'rb') as fp:
+        file_hash = hashlib.file_digest(fp, 'sha1').hexdigest()
+    return file_hash