Transaction not yet indexed

21b6jHwLcAeuWt9Me6jSygWT9ehSuufK4dP6LLVFZ2A2LE1uhdnRrHdL7q8fBtCbd5SCPFxHYzbksMx2fDvptin3

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