Transaction not yet indexed

668DMkfswAyGHuZGSPDNwJrYjYfS4cfKo8B5vazuoHfuR4sdmhHjfJBQZ7xNnZXjg3kTf28mFnRmhbUQN529ERTU

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