feat: add missing utilities used by celestia-node

share/namespace.go

@@ -138,8 +138,17 @@ func (n Namespace) ValidateForData() error {
 	if !n.IsUsableNamespace() {
 		return fmt.Errorf("invalid data namespace(%s): parity and tail padding namespace are forbidden", n)
 	}
-	if n.IsReserved() {
-		return fmt.Errorf("invalid data namespace(%s): reserved namespace is forbidden", n)
+	return nil
+}
+
+// // ValidateForBlob checks if the Namespace is valid blob namespace.
+func (n Namespace) ValidateForBlob() error {
+	if err := n.ValidateForData(); err != nil {
+		return err
+	}
+
+	if !slices.Contains(SupportedBlobNamespaceVersions, n.Version()) {
+		return fmt.Errorf("blob version %d is not supported", n.Version())
 	}
 	return nil
 }
@@ -219,19 +228,6 @@ func (n Namespace) Repeat(times int) []Namespace {
 	return ns
 }
 
-// IsBlobNamespace returns true if this namespace is a valid user-specifiable
-// blob namespace.
-func (n Namespace) IsBlobNamespace() bool {
-	if err := n.ValidateForData(); err != nil {
-		return false
-	}
-
-	if !slices.Contains(SupportedBlobNamespaceVersions, n.Version()) {
-		return false
-	}
-	return true
-}
-
 func (n Namespace) Equals(n2 Namespace) bool {
 	return bytes.Equal(n.data, n2.data)
 }
@@ -257,7 +253,7 @@ func (n Namespace) Compare(n2 Namespace) int {
 }
 
 // AddInt adds arbitrary int value to namespace, treating namespace as big-endian
-// implementation of int. It could be helpful for users to create an adjacent namespaces.
+// implementation of int. It could be helpful for users to create adjacent namespaces.
 func (n Namespace) AddInt(val int) (Namespace, error) {
 	if val == 0 {
 		return n, nil

share/random_namespace.go

@@ -37,7 +37,7 @@ func RandomBlobNamespace() Namespace {
 	for {
 		id := RandomBlobNamespaceID()
 		namespace := MustNewV0Namespace(id)
-		if namespace.IsBlobNamespace() {
+		if err := namespace.ValidateForBlob(); err == nil {
 			return namespace
 		}
 	}