Transaction not yet indexed

6688ZZaHXD5mT3oz534YFPqjEThKWmgoLzcDsPnucawxD2DPffjjRtPE37HBH1VqL2dWQn9EEgdUpaFCyF31nY9H

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