Transaction not yet indexed

42Ec51hAhRnDLNGr8dCwENi9bSXE8qP8TWmyauYNicbPbBtp75nt53Z2d2NJ1R3mbdbm2QQW2QeuYgcSPFRFPz1t

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