Transaction not yet indexed

668dkwc7RgxmGsejcBdpLbAiPTNoug542BqbXcJxpXJ4uEF2LSrCmbvdfCnda1txuEpWGGbsMYZX2PfcLhtHiD7u

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