Transaction not yet indexed

ykCMEYVCSsNBC3zCCZUEq9ynKrTLE6Jxv5niG6xD6x9Tss2b9LPhHwSpXnpkoRxTtJCgCJZHjXAu4pejdBafyc1

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