Transaction not yet indexed

518RXFRMmfmFRou3fgnRgyfDoGh7eSZrZRFBef4T1LvEnjiXKn9idiUHyqwCPo3TiFfYRHRQV5R2HXr5eZqtkeG8

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