Transaction not yet indexed

21d6CvFDK8jX3P3ZP9oUE9ArTy3Z5nGfhyVqFsefeSu2Qj5ftdJRQYaPvhaqTpGH9wRyAunTFw2YKeDRAuU3cD6y

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