Transaction not yet indexed

21Kp6UneEUTQe4snWsUFUdqRLYUsTPFLaU4fVJMVVHHaCffd2oFomjf9s1ffmmwRjEn1gFiEnFyQu51RPCARpUPA

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