Transaction not yet indexed

521hC5vm4422CSimBpWwQ49MJUdZfdktPhHgJGcWAwJ25dMiAfmE8DX2epMgYphExPzxEPxSM2qHCJFRwgQXNEXc

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