Transaction not yet indexed

668Xz31ZcLjMMS4QWrP8caL1oriiVDZBYMRKgMuseqt2oQxEcPYGNaTgoNUALUoRPLXMFFBxsExKuk5zSjeugMk2

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