Transaction not yet indexed

6688EUCdD8Mj7BHt85Qbnhvs7UPwbXDFaSn2nKgiPfzkGRhwn4a7XeshbM43nB5oTSbJZCvj38sNTYXi5t8p1oC2

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