Index validation fix (#179)

* correct blob path

* update changelog

* don't return error on non-existent blob

* Add number of pull request to CHANGELOG.md

CHANGELOG.md

@@ -9,8 +9,8 @@ Pearl changelog
 #### Changed
 - Update rust edition (#175)
 
-
 #### Fixed
+- Correct blob size comparison in index validation (#179)
 - Returning error when validating blob with corrupted records (#180)
 
 #### Updated

src/tools/validation.rs

@@ -20,7 +20,18 @@ where
 
     static_assertions::const_assert_eq!(HEADER_VERSION, 5);
     let header = read_index_header(path)?;
-    let blob_size = path.metadata()?.len();
+    let blob_path = path.with_extension("blob");
+    let blob_size = 
+        if blob_path.exists() {
+            blob_path.metadata()?.len()
+        } else {
+            if let Some(path) = path.to_str() {
+                warn!("blob file doesn't exist for {}", path);
+            } else {
+                warn!("blob file doesn't exist for index");
+            }
+            header.blob_size()
+        };
     let headers = if header.version() < HEADER_VERSION {
         return Err(Error::index_header_validation_error(format!(
             "Index version is outdated. Passed version: {}, latest version: {}",