Transaction not yet indexed

21EF51Qf29jdbWvMefMbb6zcNh7zb7uCWBozdTSTUNBubKr2sqnqAX9jQ2e7gsiKBArFhbcQpiiUUcEpZNnzFGkB

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