Transaction not yet indexed

4C921yXndcdZzzDqL1z9SwXjsYqH6u9Zb2GvMcsL6LSzRQm3cYH6yipe1q6pxsMmCRGW3dWFSpRvLzxVJ3EECdQZ

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.