Transaction not yet indexed

15kvTSk2NezX4gy2CEcpV5xTYwGASpYi2kkxijTmapo5u1mnhD5geVMEFHtGmtpn4vwCTwmTHSiqcL7rp6EAK54

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