Transaction not yet indexed

66mc4NXkhwkSq1QuDpWpQvuJBbNMB2kAVdUjiAEP28BEX51sSNZhcS9hKxkmUxaYLffM25XZ5JTmxKEA6FWH4Bv2

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