Transaction not yet indexed

Um4xc8aEHoUphpoXPyzSyfxzCjsQ8aD59yHCHG6qRPwrh85iTXKm4sx8wXeZD3m6ThGWAHDoFqWhgiGeEznKUQ4

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