Transaction not yet indexed

521XC1SF3fUMfHACTmRN3eqrcdmjg8RwdYwNTLjhCUYFp1JVUv6Vgj5VPnnHoJ2uxTaMxkVp3G5featUL9aee8fr

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