Transaction not yet indexed

668ChmGucmhCjedCrBmaKk8VDbBFco3Gt3j293QGj2vfSGEhSqD3UMYUNYcjt9HBybShPjA4EfVG14sWp9CEFvhi

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