Transaction not yet indexed

5mttthnSEHgnJzdi3ybNvaBUqYqMJNVEjaKgvQ26q4X1Mw2MPKUbUfGMfowmmY1SAH9b1mtUf5aSuBjvYW6NUpv1

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