Transaction not yet indexed

668PfWbJrXrgwaTphM2ybA9VmMQ5mVS9XfqUsiZT8FU2jDevqqNcSLRhpcNWDWZnYpzq2yGfK1SFEMgtFCTDQDEF

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