Transaction not yet indexed

521hk7DouusVLTN5VRCBgD5FuUezTZnGw8vB8TdCPp23Ebumqrrao4HQtX8YGzp3wnDom5AohJoE4YT2Et2TRTYQ

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