Transaction not yet indexed

21515ZCmNwkhQwrPoQAcr2UbdPw7Xfw4c1R4dKTcTLmNaFyPath5VphLLcyMvK1dwgfvZ8b5qs1H75WgbPvnLWC7

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