Transaction not yet indexed

a888FAmU9ats21pax9xEkXks9MoxHauPhxYUqhx1itXuFxwhdNLn7Hpp2U2a5nnHmi7f8RXTsUWUDBsZAvb1QL2

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