relax the restriction of delete latest version

Closes: cosmos#482
yihuang · Mar 11, 2022 · cbd14fa · cbd14fa
1 parent ccfb418
commit cbd14fa
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Showing 2 changed files with 2 additions and 5 deletions.
diff --git a/mutable_tree.go b/mutable_tree.go
@@ -566,9 +566,6 @@ func (tree *MutableTree) deleteVersion(version int64) error {
 	if version <= 0 {
 		return errors.New("version must be greater than 0")
 	}
-	if version == tree.version {
-		return errors.Errorf("cannot delete latest saved version (%d)", version)
-	}
 	if !tree.VersionExists(version) {
 		return errors.Wrap(ErrVersionDoesNotExist, "")
 	}

diff --git a/nodedb.go b/nodedb.go
@@ -281,8 +281,8 @@ func (ndb *nodeDB) DeleteVersionsRange(fromVersion, toVersion int64) error {
 	defer ndb.mtx.Unlock()
 
 	latest := ndb.getLatestVersion()
-	if latest < toVersion {
-		return errors.Errorf("cannot delete latest saved version (%d)", latest)
+	if latest+1 < toVersion {
+		return errors.Errorf("cannot delete future versions (..%d)", toVersion)
 	}
 
 	predecessor := ndb.getPreviousVersion(fromVersion)