Transaction not yet indexed

668HdZnZCwCEGtyWL1YcfRbf92SoyduSemQVy61CWJqzWoJjfhhPBjr44rtWc1kf9UPY3mqekpvRCMtaUdkdpDnv

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