Transaction not yet indexed

521YDJnuxphjMunLQhjqt9fBWFCPftMgpfUJDHz4Kmm3bjxRa4emdVGVybdEQSJEXrmoDSLf8yJLJqwnZ45ttMDM

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