Transaction not yet indexed

21C6M15pEmTHPdgAowyWKXZek1VSyMsHdmatbK6exwZr7BZ9m5b6bmw9YN1XGF1NnS3RuaVPHPCCFqBNpdkfcrkp

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