Transaction not yet indexed

638Mb78xNdBX5ZqLFHecK4AuEHNvYqdjVQ84G2je6m9c6kKsWCWuk1vLpg1QfswvmNdwvx1PjX929bRDnZ92r2HA

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