diff --git a/corrlib/tools.py b/corrlib/tools.py
index 44697cc..70eb518 100644
--- a/corrlib/tools.py
+++ b/corrlib/tools.py
@@ -1,5 +1,5 @@
-
-
+import hashlib
+import os
 
 def str2list(string):
     return string.split(",")
@@ -21,4 +21,11 @@ def k2m(k):
 def record2name_key(record_path: str):
     file = record_path.split("::")[0]
     key = record_path.split("::")[1]
-    return file, key
\ No newline at end of file
+    return file, 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